Autologous micro-fragmented adipose tissue for the treatment of diffuse degenerative knee osteoarthritis: an update at 3 year follow-up

Background.

The management of chondral disease is challenging because of its intrinsic poor healing potential. Biomechanical and biological changes may lead to the loss of tissue homoeostasis, resulting in an accelerated degeneration of the articular surface, eventually leading to end-stage osteoarthritis (OA).

Conservative therapies for the treatment of knee degenerative processes, such as non-pharmacological interventions, systemic drug treatment and intra-articular therapies are used before resorting to surgery; nonetheless, they may offer only short-term benefits. Encouraging preliminary results have been reported using mesenchymal stem cells (MSCs), either alone or in association with surgery. Among the many sources of MSCs, adipose tissue has created a huge interest in the context of cartilage regeneration (Pak et al. 2016; Ruetze and Richter 2014), due to its wide availability, ease to harvest and richness in mesenchymal cell elements within the so called stromal vascular fraction (De Girolamo et al. 2016; Caplan 2008; Caplan and Correa 2011; Caplan and Dennis 2006). Moreover, MSCs from adipose tissue are characterized by marked anti-inflammatory and regenerative properties, which make them an excellent tool for regenerative medicine purposes (De Girolamo et al. 2016; Caplan 2008; Caplan and Correa 2011; Caplan and Dennis 2006). Nevertheless, preparation of autologous MSCs for injection requires ex vivo culture from a good manufacturing practice facility, which makes the process laborious and expensive (Ährlund-Richter et al. 2009; Arcidiacono et al. 2012; Sensebé et al. 2010). An increasing number of adipose tissue-derived cell isolation systems, allowing for minimal manipulation, have been developed in the last years. We previously reported the safety and feasibility of autologous micro-fragmented adipose tissue as adjuvant for the surgical treatment of diffuse degenerative chondral lesions at 1 year follow-up (Russo et al. 2017). Here we present the outcomes of the same cohort of patients evaluated at 3 year follow-up.

Methods.

The original study was approved by the Ethics Committee of Verona and Rovigo – Italy (protocol n° 10,227, March 1st, 2016). An extension of the study protocol has been conceded by the same authority to evaluate the results at 3 years (protocol n° 14,505, March 14th 2018) and written informed consent was obtained from all patients.

Study design and population, surgical techniques, post-op rehabilitation protocol, safety and clinical evaluation were previously described (Russo et al. 2017). Briefly, 30 patients, affected by diffuse degenerative chondral lesions of different degrees of severity, were treated with autologous and micro-fragmented adipose tissue between 1stJanuary 2014 and 31st December 2014. Of these 30 patients, 24 (80%) also had an associated surgery (ACL/LCL reconstruction, high tibial osteotomy, meniscectomy), while six (20%) underwent arthroscopy alone. For the 3 year follow-up all the patients were re-contacted and clinically evaluated by the same clinicians.

Findings.

Of the 30 patients treated with autologous micro-fragmented adipose tissue, eight also had meniscal surgery, five plate removal, three osteotomy, two ligament surgery, two microfractures, and four other surgical procedures. The remaining six had arthroscopy alone. Despite the heterogeneity of the associated surgical procedures all the patients shared the presence of chondral lesions of different degrees of severity (Russo et al. 2017).

At 3 years follow-up, one patient was lost, and seven (23%) received additional treatments in the period of observation, and therefore have been considered failures. In detail, between 18 and 30 months, one patient had three injections of hyaluronic acid and the other six had multiple injections of platelet rich plasma. Background data on this subpopulation is reported in Table 1.

Table 1: Background data of the failures (n = 7)

Age y/o
 Mean 36.3
 Standard deviation 7.3.
Type chondropathy
 FC 4 (57%)
 TP 2 (29%)
 PF 6 (86%)
 Three-compartment 2 (29%)
Associated surgery
 YES 5 (71%)
 NO 2 (29%)

FC femoral condyle, TP tibial plateau, PF patellofemoral.

No adverse events, lipodystrophy cases at the harvesting site nor atypical inflammatory reactions at the joint level were reported in the 3 year period for all the 29 patients.

On average, the 22 patients that had no other treatments in the 3 year period (Table 2) showed that the results observed at 1 year were maintained (T36 vs. T12, p > 0.05). Moreover, 41, 55, 55 and 64% of the patients improved with respect to the 1-year follow-up in the Tegner Lysholm Knee, VAS, IKDC-subjective and total KOOS, respectively.
Table 2: Background data of the population (n = 22)
Age y/o
 Mean 44.7
 Standard deviation 11.4
Gender
 M 14 (64%)
 F 8 (36%)
BMI
    Mean 25.9
 SD 3.3
Sport
 Profesionals 1 (4%)
 Amateurs 9 (41%)
 Occasional 5 (23%)
 Inactive 7 (32%)
Grade chondropathy (ICRS classification)
 II 7 (32%)
 III 6 (27%)
 IV 9 (41%)
Type chondropathy
 FC 17 (77%)
 TP 14 (64%)
 PF 14 (64%)
 Three-compartment 9 (41%)
Associated surgery
 Yes 18 (82%)
 No 4 (18%)

FC femoral condyle, TP tibial plateau, PF patellofemoral.

Compared to pre-operative values, more than 50% of the patients improved at least 20 points in all the considered scores, and, surprisingly, 55% of the patients improved at least 30 points in the VAS pain scale. A summary of the results is reported in Figure 1.
Figure 1
Trend of functional improvements of Tegner Lysholm knee, VAS pain, IKDC subjective and total KOOS pre-operatively (white bars), at 12 (grey bars) and 36 months (black bars) after micro-fragmented adipose tissue injection. Results are expressed as mean and standard error.

Discussion

The main finding of this study is that the beneficial effect of autologous micro-fragmented adipose tissue as adjuvant for the treatment of diffuse degenerative chondral lesions is maintained in the mid-term. In addition, no complications were observed in the 3 year period showing the safety profile of this procedure. No patient, including the seven patients who received additional treatments, worsened compared to the pre-operative condition.

Despite the heterogeneity of the associated surgical procedures all the patients shared the presence of chondral lesions of different degrees of severity, which may have been responsible for the impairment in function and pain.

As reported in literature, articular surface damages, especially when diffused (three compartment OA), positively correlate with a decay in the outcomes in patients who received knee surgery for other reasons (Bonasia et al. 2014; Røtterud et al. 2012; Saithna et al. 2014; Su et al. 2018; Verdonk et al. 2016). Published data shows a decline in the clinical results in the mid to long-term for arthroscopic and chondral debridement procedures in cases of initial knee OA (Su et al. 2018). Some authors assessed the effectiveness of the arthroscopic or conservative treatments in patients diagnosed with knee OA (Kellgren-Lawrence grade 2 to 4) with 5 years of follow-up, concluding that arthroscopy provided no benefit in decreasing or delaying arthroplasty and that it can relieve symptoms only up to 2 years (Su et al. 2018). The same observation has been reported for ligament reconstruction, where the short and mid to long-term benefits are inferior in patients who have cartilage lesions. In a study of a cohort of ACL-injured patients with full-thickness cartilage lesions (ICRS grade III–IV), the authors showed that ACL-injured patients with full-thickness cartilage lesions reported worse outcomes and minor improvement after ACL reconstruction compared to patients without cartilage lesions at 2–5 years follow-up, although no significant differences between the two groups at the time of ACL reconstruction were present. This means that the observed differences between the groups must have occurred during the follow-up period (Røtterud et al. 2012). Furthermore, the outcomes of osteotomy procedures in patients with diffuse degenerative knee chondropathy worsen in the mid to long-term (Bonasia et al. 2014; Saithna et al. 2014). In a study reporting the results of a case series of opening wedge distal femoral varus osteotomies for valgus lateral knee OA, it is shown that re-operation for non-arthroplasty related surgery was common due, besides others, to infection and persistence of symptoms (Saithna et al. 2014). With regard to meniscectomy, in a recently published paper it is concluded that meniscus therapy including partial meniscectomy, meniscus suture, and meniscus replacement has proven beneficial effects in long-term studies in patients without cartilage damage, supporting the hypothesis that meniscectomy increases the risk of cartilage degeneration (Verdonk et al. 2016).

Based on the aforementioned published evidences, we should have expected, in the mid-term, a decay of the outcomes. Notably, the results have been maintained with no significant differences in all the evaluated parameters with respect to the 1 year follow-up assessment. Furthermore, in line with that already observed at 1 year, the patients with lesions in more than one compartment had higher and statistically significant improvements compared to patients with lesions in only one compartment (p < 0.01). This finding supports our hypothesis of using micro-fragmented adipose tissue for the treatment of the diffuse degenerative knee pathology as an adjuvant of the surgical procedures. Indeed, the maintenance of stable results at the last follow-up leads to hypothesize a protective role of micro-fragmented adipose tissue in a further chondral degeneration.

The seven patients who received additional biological therapies in the 3-year period, were young (mean age 36.3 ± 7.3 vs. 44.7 ± 11.4), very active in sport and 6 out of 7 had a patellofemoral chondropathy. Their conditions after 1 year did not worsen, but they probably needed an additional biological treatment because of their high functional demands and the presence of the patellofemoral chondropathy, which is a negative prognostic element, even if the small number of patients does not allow for any statistical correlation.

References.

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Autologous mesenchymal stem cell application for cartilage defect in recurrent patellar dislocation: A case report

Introduction.

Recurrent patellar dislocation is a repeated dislocation that follows from an initial episode of minor trauma dislocation . Conservative management gives a minimal result in re-dislocation, with persistent symptoms of anterior knee pain, instability and activity limitation. Meanwhile, there is no gold standard treatment of realignment procedures. This can further cause cartilage lesion in the patella and femoral condyle, and consequently increase the risk of re-dislocation. Mesenchymal stem cells (MSCs) have been widely explored for treating cartilage defect due to their potency of chondrogenic differentiation. We present a novel approach of treating cartilage lesions in recurrent patellar dislocation by combining of arthroscopic microfracture and autologous bone marrow derived MSCs (BM-MSCs) after Fulkerson osteotomy.

Presentation of case.

A 21-year-old male presented with left knee discomfort. Ten years ago, the patient felt discomfort on the medial side of the knee and felt his knee cap slide out laterally. The patient experienced several episodes of instability ranging from a feeling of “giving away” until a prominent lateral sliding-off of his knee cap. Anterior knee pain has also occurred during activities such as climbing stairs or exercising.

Physical examination revealed slight pain on the anterior side of the patella, but no atrophy or squinting patella. Knee range of motion (ROM) was normal when the knee cap position was normal, but was limited when it was dislocated (0–20°). Lateral subluxation of the patella was found when the knee was extended from 90° flexion position (J-sign positive), positive patellar apprehension test, with medial patella elasticity/patellar glide >2 quadrants. The Q angle, in the 90° flexed knee position, was 10°, which was still normal. The plain radiograph imaging showed no abnormality. Insall-Salvati index was 1.12. The patient was diagnosed with recurrent patellar dislocation, with suspected cartilage lesion of the left knee.

The first surgery was an arthroscopy diagnostic and distal realignment procedure (lateral retinaculum release, percutaneous medial retinaculum plication, and antero-medialization of tibia tubercle/Fulkerson osteotomy). We found articular cartilagedefects on the lateral condyle of the femur with a diameter of 3 cm (Figure. 1A), and on the postero-medial with a diameter of 2.5 cm (Figure. 1B), and the depth of both was more than 50% of the cartilage thickness. We determined that the articular defect was Grade 3 according to International Cartilage Regeneration & Joint Preservation Society (ICRS). We performed a dissection of lateral retinaculum (lateral release) (Figure. 1C) using an electrocautery, continued by incising the medial side of tibia tuberosity and detaching the patellar tendon by using an oblique osteotomy procedure on tibia tuberosity, where the fragment slide 1 cm antero-medially and fixed with two 3.5 mm (length 40 mm) partial threaded cancellous screw, followed by percutaneous plication on the medial side of the patella using non-absorbable string (Figure. 2A). Post-operative ROM was 90° flexion without any dislocation (Figure. 2B) and the position of the screws was good (Figure. 2C).

Figure 1.A. Cartilage defect on the femoral lateral condyle with a diameter of 3 cm (pointed by the arrow). B. Articular cartilage defect on posteromedial patella with a diameter of 2.5 cm (pointed by the arrow). C. Lateral retinaculum dissection/lateral release using an electrocautery (pointed by the arrow).

Figure 2.A. Percutaenous medial plication using non-absorbable string no.2. B. Post-operative anteroposterior and lateral projection of plain radiograph imaging. C. Post-operative CT scan.

One month after surgery, full ROM and weight bearing exercises were started, including knee exercise until maximum flexion was reached along with quadriceps muscle exercise. Eighteen month after that surgery, we performed an iliac crestbone marrow aspiration; arthroscopic microfracture by using an awl until 4 mm depth was reached on the site located ±3–4 mm from the articular cartilage defect on the posteromedial patella and femoral lateral condyle (Fig. 3A); and tibial tuberosity screw removal.

 

Figure 3.A. Arthroscopic microfracture on cartilage defect using an awl, with a depth of ±4 cm. B. The mesenchymal stem cell culture after day 22 showing fibroblast-like cell/spindle shaped cells that 100% confluent.Approximately 30 mL of bone marrow was aspirated from the posterior iliac crest. Bone marrow aspirate was diluted in phosphate-buffered saline (PBS) and centrifuged at room temperature. The buffy coat was washed and cultivated for 3–4 weeks until reaching the required amount (107 MSCs/mL) (Figure. 3B). The cells were harvested and characterized with flow cytometer. The MSCs, having negative bacteria and fungi tests, were injected intra-articularly into the left knee. Then, 2 mL HA were injected weekly for 3 weeks. Non-weight bearing exercise was conducted for 6 weeks.

Outcomes were assessed by using International Knee Documentation Committee (IKDC) score, visual analog scale (VAS) score and imaging. Baseline IKDC score was 52.9 and VAS score was 8. Nineteen months after the first surgery, IKDC score was improved to 93.1, while the VAS score decreased to 2. Six months after MSCs implantation, evaluation by MRI FSE cor T2-weighted signal (cartilage sequence) showed a significant growth of articular cartilage covering most of the defect (Figure. 4). Two years after the MSCs implantation, there was no complaint and full ROM was reached.

Figure 4.MRI FSE cor T2-weighted signal in different slice. Left image showing cartilage defect (pointed by the arrow). Right image showing cartilage growth was found in the defect (pointed by the arrow).

Discussion

Recurrent patellar dislocation are uncommon problem, with recurrence rate 15%–44% after conservative management, while cartilage lesions following recurrent patellar dislocations are quite common, but still no gold standard or consensus on the management. This patient was diagnosed as chondromalacia Grade 3 Outerbridge classification and Grade 3 ICRS. One of the suitable procedures for recurrent patellar dislocation with chondromalacia, especially Grade 3 or 4, was Oblique Fulkerson-type osteotomy, with or without the release of lateral retinaculum. This distal realignment procedure could decrease patellofemoral pain by anteriorization of tibial tuberosity, decreasing articular contact pressure and at the same time medializing knee extensor mechanism. Therefore, we performed the Fulkerson-type osteotomy with lateral retinacular release, combined with percutaneous medial plication since the patient was already 21 years of age and the bone was expected to be mature so that the risk of premature physeal closure in proximal tibia can be avoided. This technique has demonstrated good results (86%), although it had a risk of tibial stress fracture in the healing process. The lateral retinacular release is an adjuvant after tibial tubercle medialization to re-center the patella. It was reported that isolated lateral retinacular release significantly gives an inferior long-term result compared to medial reefing. Percutaneous plication of medial patella procedure was indicated to build a strong construct by shortening the patellofemoral ligament, in order to prevent lateral sliding of the patella.

Treatment of articular cartilage defect remains challenging since it has limited self-healing capacity. Lesions that do not reach the subchondral zone will be unlikely to heal and usually progress to a cartilage degeneration. Limited blood supply in the cartilage and low chondrocyte metabolic activity disrupt natural healing that is supposed to fill the defect by increasing hyaline cartilage synthesis activity or stem cell mobilization from bone marrow to site of injury. The proper initial procedure for chondral lesion >4 cm2 was marrow stimulation by mosaicplasty or microfracture; and for a lesion <4 cm2 and >12 cm2 accompanied with symptoms, autologous cartilage implantation (ACI) beneath a sutured periosteal flap was promising. This procedure could not regenerate cartilage in the long term, due to loss of flap or cell suspensions. A scaffold (e.g. HA) was then used to act as an anchorage for chondrocytes adherence on cartilage defects and to promote the secretion of chondrocyte extracellular matrix. The BM-MSCs implantation could be an alternative source of the chondrocytes. Human BM-MSCs are relatively easy to isolate and to be cultured in such a condition that may retain their capability to differentiate into chondrocytes.

The MSCs effect was reported as effective as ACI and even had the advantage over ACI in terms of the number cells obtained, better proliferation capacity and less damage in the donor site. Treating large cartilage defects by using BM-MSCs showed good outcome, but the transplantation procedure was invasive. Wong et al. conducted a clinical study of the BM-MSCs intra-articular injection in combination with high tibial osteotomy (HTO) and microfracture for treating cartilage defect with varus knee. They reported that intra-articular MSCs injection improved the outcomes in the patients undergoing HTO and microfracture. Here we performed also a less invasive approach by injecting the autologous BM-MSCs intra-articularly, following the arthroscopic microfracture using an awl to penetrate the subchondral bone plate in the cartilage defects, which led to clot formation. This clot contains progenitor cells, cytokines, growth factors and pluripotent, marrow-derived mesenchymal stem cells, which produce a fibrocartilage repair with varying amounts of type-II collagen content. Cytokine within the fibrin clot will attract the injectable stem cells to the cartilage lesions.

The HA injection in this patient was aimed to suspend the MSCs and to support regenerative potency of MSCs with chondroinductive and chondroprotective potency of HA. Intraarticular injection of MSCs suspended in HA could be an alternative treatment for large cartilage defect. Supporting microfracture technique by intra-articular HA injections had a positive effect on the repair tissue formation within the chondral defect. The MRI showed that there was a growth of articular cartilage covering most of the defect even though it was not perfect as yet.

Conclusion

This case report demonstrated that combining Fulkerson osteotomy with the lateral retinacular release and percutaneous medial plication was effective in treating chronic patellar instability. The combination of microfracture and MSCs implantation was safe and could regenerate the articular cartilage in this patient.

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Focus on Mesenchymal Stem Cell-Derived Exosomes: Opportunities and Challenges in Cell-Free Therapy

Lin Cheng,1 Kun Zhang,2  Shuying Wu,1  Manhua Cui,1 and  Tianmin Xu1

1Gynecology and Oncology Department of the Second Hospital of Jilin University, Ziqiang Street 218, Changchun 130000, China
2Medical Research Center, Second Clinical College, Jilin University, Ziqiang Street 218, Changchun 130000, China

Received 11 August 2017; Revised 5 November 2017; Accepted 22 November 2017; Published 19 December 2017

Academic Editor: Changwon Park

Abstract

Mesenchymal stem cells have been at the forefront of regenerative medicine for many years. Exosomes, which are nanovesicles involved in intercellular communication and the transportation of genetic material transportation that can be released by mesenchymal stem cells, have been recently reported to play a role in cell-free therapy of many diseases, including myocardial infarction, drug addiction, and status epilepticus. They are also thought to help ameliorate inflammation-induced preterm brain injury, liver injury, and various types of cancer. This review highlights recent advances in the exploration of mesenchymal stem cell-derived exosomes in therapeutic applications. The natural contents, drug delivery potency, modification methods, and drug loading methods of exosomes are also discussed.

1. Introduction

Mesenchymal stem cells (MSCs) originate from the mesoderm of many tissues, including bone marrow, liver, spleen, peripheral blood, adipose, placenta, and umbilical cord blood, and have the capacity to self-renew and the ability to generate differentiated cells. Over the last decade, MSCs have emerged as a popular research topic because of their potential role in regenerative medicine, immunoregulation, neuroprotection, and antitumor effects originally attributed to direct cell replacement. However, experimental data indicates that most MSCs are largely cleared, while a small proportion will integrate into injured tissue after intravenous injection [1]. Furthermore, the “cell replacement theory” does not account for the sufficient durations in a variety of disease models [2, 3]. Recently, several mechanisms have been put forward regarding the therapeutic potential of MSCs, including (1) paracrine factors involving proteins/peptides and hormones and (2) the transfer of mitochondria or exosomes/microvesicles packaging multitudinous molecules [4].

Exosomes are a family of nanoparticles with a diameter in the range of 40–100 nm that are generated inside multivesicular endosomes or multivesicular bodies (MVBs) and are secreted when these compartments fuse with plasma membrane [5]. Exosomes are enriched in endosome-derived components as well as many bioactive molecules such as proteins, lipids, mRNAs, microRNAs (miRNAs), long noncoding RNAs (lncRNAs), transfer RNA (tRNA), genomic DNA, cDNA, and mitochondrial DNA (mtDNA) [6–12]. It has also been reported that exosomes may be released from multiple cell types, including reticulocytes [13], immunocytes, tumor cells, and MSCs [14]. This suggests that the secretion of exosomes is a general cellular function that plays an important role in the intercellular transfer of information.

In this review, we focus on the mechanisms of exosomes/microvesicles, covering the current knowledge on biological characteristics and their potential cell-free therapeutic applications for MSC-derived exosomes.

2. Characterization and Isolation of Exosomes

Exosomes were first discovered by Harding’s group as “a garbage can” in maturing sheep reticulocytes [13]. Originally, they were thought to have a typical “cup-shaped” or “saucer-like” morphology when analyzed by electron morphology [15, 16]. Zabeo’s group revealed a wide diversity in exosome morphology when purified from homogeneous cell types (the human mast cell line HMC-1). They classified exosome morphology into nine categories: (1) single vesicle; (2) double vesicle; (3) triple vesicle or more; (4) small double vesicle; (5) oval vesicle; (6) small tubule; (7) large tubule; (8) incomplete vesicle; and (9) pleomorphic vesicle [17]. This categorization suggested that different morphologies of exosomes may be accompanied by various and specific functions. Exosomes also contain surface proteins unique to the endosomal pathway, which are generally used to characterize exosomes and distinguish them from microvesicles (MVs), apoptotic bodies, and other vesicles (Table 1), such as tetraspanins (CD63, CD81, and CD9), heat shock proteins (Hsc70), lysosomal proteins (Lamp2b), the tumor-sensitive gene 101 (Tsg101), and fusion proteins (CD9, flotillin, and annexin) [12, 18]. Exosomes are released in almost all types of extracellular fluids, including blood, urine, amniotic fluid, ascites, hydrothorax, saliva, breast milk, seminal fluid, and cerebrospinal fluid. Exosomal content greatly depends on cellular origin. For example, exosomes derived from B lymphocytes that bring functional MHCI, MHCII, and T cell costimulatory molecules can stimulate T cell proliferation [19]. Furthermore, cancer cell-derived exosomes contain gelatinolytic enzymes and other cell adhesion-related molecules to help tumor progression and metastasis [20]. Importantly, these cancer cell-derived exosomes are actively incorporated by MSCs in vitro and in vivo, in that the transfer of exosomal proteins and miRNAs acquire the physical and functional characteristics of tumor-supporting fibroblasts [21, 22]. For more details on the molecular cargos and extracellular signal transmission pathway of exosomes, the reader may refer to ExoCarta (http://www.exocarta.org) or EVpedia (http://evpedia.info), as well as the American Society for Exosomes and Microvesicles (http://www.asemv.org), for an in-depth exploration.

Table 1: Characterization of various extracellular vesicles.

Ultracentrifugation and a commercial kit rooted in polymer-based precipitation are the most well-established purification protocols [16]. Other conventional validated isolation methods described in the literature include ultrafiltration, chromatography, and affinity capture [23]. New protocols have been established in order to facilitate the large-scale and high-purity manufacture of exosomes. Microfluidic techniques [24] are based on electrochemical, electromechanical, viscoelastic [25], optical, nonoptical, and other principles, yet the isolation is a mixed population of small nanoparticles without further demonstration of their intracellular origin. Thus, we use the term exosomes in this review to refer to extracellular vesicles characterized by exosome-specific surface markers, regardless of the primitive appellations in the published data.

3. Cargos and Functions of MSC-Derived Exosomes

The abundance of cargos identified from MSC-derived exosomes attracts broad attention because of their therapeutic potential in cardiovascular disease, tissue (kidney, liver, skin, and cornea) repair, immune disease, tumor inhibition, and neurological disease (Figure 1). They function largely via the constant transfer of miRNAs and proteins, resulting in the alteration of a variety of activities in target cells via different pathways.

Figure 1: The main functions of MSC-derived exosomes. The external bilayer (green circle) is the membrane and the internal bilayer (white circle) is packed with various bioactive compounds.
3.1. Protein

Over 900 species of proteins have been collected from MSC-derived exosomes according to ExoCarta. With the exception of some common proteins involved in cell metabolism and the cytoskeleton, many proteins have been found in different tissue sources of MSC-derived exosomes. Proteomic studies by Kang’s group identified 103 proteins from neural stem cell-derived exosomes. For example, the presence of polymyositis/scleroderma autoantigen 2 (PM/Scl2), a highly specific nuclear autoantigen, indicates that exosomes may be involved in triggering autoimmunity. They also found an imparity between exosomes larger than the baseline (50 nm) and those of smaller morphology [26]. These findings may explain the phenomenon recently observed by Caponnetto et al. regarding size-dependent cellular uptake of exosomes by target cells [27]. Intriguingly, all enzymes involved in the ATP synthesis of glycolysis (glyceraldehyde 3-phosphate dehydrogenase (GAPDH), phosphoglycerate kinase (PGK), phosphoglucomutase (PGM), enolase (ENO), and pyruvate kinase m2 isoform (PKm2)), as well as the rate-limiting glycolytic enzyme phosphorylated PFKFB3 that upregulates phosphofructose kinase, were identified in MSC-derived exosomes. Furthermore, oxidative stress was reduced via peroxiredoxins and glutathione S-transferases in MSC-derived exosomes [28], which suggests that replenishing glycolytic enzymes to increase ATP production, as well as additional proteins to reduce oxidative stress through exosomal transportation, may help reduce cell death in myocardial ischemia/reperfusion injury. Comparable levels of VEGF, extracellular matrix metalloproteinase inducer (EMMPRIN), and MMP-9 have also been reported in MSC-derived exosomes.

These three proteins play a vital role in stimulating angiogenesis [29], which could be fundamental for tissue repair. Recent experimental evidence summarized by Burrello suggests that transcriptional factors, such as Nanog, octamer-binding transcription factor 4 (Oct-4), HoxB4, and Rex-1, play an important role in the immune system [30]. For example, HoxB4 has been shown to affect DC maturation and T-cell proliferation, differentiation, and activation through WNT signaling. Interestingly, membrane proteins and exosome-specific surface markers, such as CD81, CD63, and CD9, may affect the immune response by regulating cell adhesion, motility, activation, and signal transduction [31]. Several studies have also shown that exosomes derived from MSCs harbor cytokines and growth factors, such as TGFβ1, interleukin-6 (IL-6), IL-10, and hepatocyte growth factor (HGF), which have been proven to contribute to immunoregulation [30].

3.2. miRNAs

miRNAs consist of a class of small noncoding RNAs that regulate gene expression posttranscriptionally by targeting mRNAs to induce suppression of protein expression or cleavage [32]. Many miRNAs have been found in MSC-derived exosomes and are reportedly involved in both physiological and pathological processes such as organism development, epigenetic regulation, immunoregulation, tumorigenesis, and tumor progression. Notably, exosomes with membrane structure act as preservers and deliverers of miRNAs, transferring functional miRNAs into recipient cells. It has been reported that exosomal miR-23b, miR-451, miR-223, miR-24, miR-125b, miR-31, miR-214, and miR-122 [33, 34] may inhibit tumor growth and stimulate apoptosis through different pathways. For instance, miR-23b promotes dormancy in metastatic breast cancer cells via the suppression of the target gene MARCKS, which encodes a protein that promotes cell cycling and motility [34]. MiR-16, shuttled by MSC-derived exosomes, has also been found to suppress angiogenesis by downregulating VEGF expression in breast cancer cells [35].

Recently, let-7f, miR-145, miR-199a, and miR-221, which are released from umbilical MSC-derived exosomes, have been found to largely contribute to the suppression of hepatitis C virus (HCV) RNA replication [36]. Di Trapani’s group evaluated the immunomodulatory effects exerted by MSC-derived exosomes on unfractionated peripheral blood mononuclear cells and purified T, B, and NK cells. They observed that exosomes had higher levels of miRNAs compared to MSCs and could also induce inflammatory priming via increasing levels of miR-155 and miR-146, which are two miRNAs involved in the activation and inhibition of inflammatory reactions [37]. Similar immunosuppressive functions have also been reported in animal experiments by Cui et al. [38]. Exosomes from MSCs effectively increased the level of miR-21 in the brain of AD mice. Additionally, replenishment of miR-21 restored the cognitive deficits in APP/PS1 mice and prevented pathologic features by regulating inflammatory responses and restoring synaptic dysfunction [38]. Recent studies have also shown that aging is substantially controlled by hypothalamic stem cells, partially through the release of exosomal miRNAs [39]. However, contradictions regarding these outcomes remain. A quantitative analysis of exosomal miRNA abundance and stoichiometry by Chevillet’s group quantified both the number of exosomes and the number of miRNA molecules in replicate samples isolated from diverse sources. Regardless of the source, the study indicated that, on average, over 100 exosomes would need to be examined to observe one copy of a given abundant miRNA, suggesting that most individual exosomes do not carry biologically significant numbers of miRNAs and are thus unlikely to be functional individually as vehicles for miRNA-based communication [40].

3.3. Others

In 2006, MSC-derived exosomes that could modulate the phenotype of target cells, supporting self-renewal of hematopoietic progenitors and multipotency by transfer of growth factors and mRNA, were first reported. For instance, exosomal SOX2 was found to initiate innate responses against microbial infection through neutrophil activation [41]. Although MSC-derived exosomes have the same morphology as exosomes from other cells and carry typical markers, they are quite different in regard to compartmentalization and protein and RNA composition. For example, studies have indicated that not all MSC-derived exosomes are equivalent [42]. Baglio’s group [6] characterized the small RNAome of exosomes released by early passage adipose-MSCs (ASC) and bone marrow-MSCs (BMSCs). They found a large discrepancy in the proportion of miRNAs in total small RNA content between cells (19–49%) and exosomes (2–5%), suggesting that the miRNAs in exosomes do not merely reflect the cellular content. Further studies regarding the overrepresentation of small RNA content-tRNAs revealed a similar outcome. The most abundant tRNA in ASC exosomes, tRNA GCC (Gly), represented only a small fraction (5%) of the total cellular tRNA. Importantly, the authors also determined that the striking differences in tRNA species seemed to be associated with the differentiation status of MSCs. Recent research has shown that the stability of exosome composition is susceptible to localized environmental conditions. For example, hypoxia and inflammatory signals, such as lipopolysaccharides, may be strong interference factors [43].

4. Exosomes as Drug Delivery Vehicles

Optimal features of drug delivery vehicles may be applied to improve carrier qualities, including cellular tropism, efficient therapeutic cargos, appropriate physicochemical properties, and sufficient immune tolerance. Among the many drug platforms, liposomes have been the preferred pharmaceutical vehicles for drug delivery. A wide range of liposome products have been approved for the treatment of diseases, including fungal infections, pain management, hepatitis A, influenza, and various types of cancer [44, 45]. In contrast to liposomes, exosomes are optimal for drug delivery because of their natural properties and plasticity with minor modifications. Here, we compare exosomes and liposomes and suggest that exosomes may be a promising star for drug delivery.

4.1. Exosomes versus Liposomes

Exosomes and liposomes are both coated with a phospholipid membrane. The membrane structure of exosomes is inlayed with multiple natural biomolecules, such as surface proteins and MHCs, while liposomes may be modified with targeting ligands or inert polymeric molecules such as oligosaccharides, glycoproteins, polysaccharides, and synthetic polymers [45]. The size of liposomes is in the range of 30 nm to several microns [46]. Smaller liposomes (as small as exosomes) display a prolonged circulation time compared to larger ones, but the capacity for optimal drug reservation and release profiles is partly lost. For more details regarding circulation time and biodistribution, readers can refer to other sources [46]. Regarding cellular interactions and uptake, liposomes can be equipped with targeting ligands, which can bind to receptors or other molecules that are specific or overexpressed by target cells for interactions and the intracellular delivery of drugs [46]. However, the drug delivery of liposomes is not efficient, since many modifications have been designed to minimize clearance and poisonousness. In general, liposomes accumulate in the macrophages of the liver and spleen after intravenous injection. Few liposomes are interspersed in other tissues, which may be due to the lack of immunocompatibility. On the other hand, exosomes are born with many features of an ideal drug delivery vehicle. For example, they exhibit lower toxicity compared to liposomes. In addition, they are well tolerated by the immune system, even across the blood-brain barrier, avoiding phagocytosis or degradation by macrophages [47]. Exosomes exhibit an innate targeting tendency. For instance, MSC-derived exosomes home preferentially to inflamed tissues and tumor tissues [48]. Furthermore, abundant bioactive materials within exosomes or on the surface provide primitive treatment potential, and there are abundant modification methods for membrane targeting and drug loading. Alvarez-Erviti et al. engineered dendritic cells to express Lamp2b, an exosomal membrane protein, fused to the neuron-specific RVG peptide and loaded these modified exosomes with siRNAs by electroporation. These intravenously injected exosomes showed a strong knockdown of BACE1 (mRNA (60%) and protein (62%)), a therapeutic target of Alzheimer’s disease, in wild-type mice [49].

4.2. Exosomal Modification and Cargo Loading

To amplify the therapeutic effects, many studies try to modify and load various treatment factors into exosomes via various methods. To date, these methods can be classified into two categories: (1) loading after isolation and (2) loading exosomes during biogenesis.

The first approach has been applied to load chemotherapeutic agents, siRNAs, and miRNAs. To reduce immunogenicity and toxicity of doxorubicin, Tian’s group facilitated exosomal tumor targeting by engineering mouse immature dendritic cells (imDCs) to express a well-characterized exosomal membrane protein (Lamp2b) fused to a breast cancer-specific iRGD peptide (CRGDKGPDC). Chemotherapeutic agents were loaded via electroporation. The results showed an encapsulation efficiency of up to 20% and exosomal-delivered doxorubicin specific to breast cancer cells in vitro, leading to strong antiproliferative activity without overt toxicity after intravenous injection of BALB/c nude mice [50]. For nucleic acid, electroporation method has also been the first-rank used reported in several studies [49, 51]. Although these studies provided positive delivery outcomes, debates remain. Some studies indicate that siRNA encapsulation is an illusion caused by nonspecific aggregate formation, independent of the exosomes. In addition, no significant encapsulation of siRNA could be measured when aggregate formation was blocked [52]. Therefore, it is necessary to establish multiple protocols for loading exosomes with nucleic acid.

The second approach is based on transfection methods to package active proteins, nucleic acid, and other active molecules into exosomes, where cells are transfected with an engineered effector-expressing vector. Liu’s group used this method to load cells with opioid receptor Mu (MOR) siRNA in order to treat drug addiction via downregulating the expression of MOR, the primary target for opioid analgesics used clinically, including morphine, fentanyl, and methadone. This novel study provided a new strategy for the treatment of drug addiction [53]. Similarly, synthesized RNA oligonucleotides were transferred to MSCs in order to produce miR-143-rich exosomes, inhibiting the migratory potential of osteosarcoma cells [54]. Akt was transfected into umbilical cord-derived MSCs by using an adenovirus transfection system that improved cardiac function in animals treated with modified exosomes [55]. In addition, Pascucci reported that MSCs can acquire strong antitumor properties after incubation with paclitaxel (PTX), including the uptake of high drug doses followed by release into exosomes, inhibiting tumor growth activity. This method provides the possibility of using MSCs for the development of drugs with a higher cell-target specificity [56]. Sterzenbach reported the usage of the evolutionarily conserved late-domain (L-domain) pathway as a mechanism for loading exogenous proteins into exosomes [57]. They labeled an intracellular target protein with a WW tag, which was recognized by the L-domain motifs on Ndfip1, resulting in the loading of the target protein into exosomes.

For better tissue-targeting and an enhanced exosomal therapeutic effect, surface modification of exosomes was recently attempted by many groups using gene transfection techniques. The conventional method for surface protein loading was the expression of a genetic fusion between the targeted peptide and a protein that natively localized on the exosomal surface, such as Lamp2 [50]. Similarly, Ohno and colleagues engineered donor cells to express the transmembrane domain of platelet-derived growth factor receptor fused to the GE11 peptide, which efficiently delivered let-7a miRNA to epidermal growth factor receptor- (EGFR-) expressing breast cancer cells [58]. Furthermore, Tamura modified the exosomal surface by a simple mixing of original exosomes and cationized pullulan through an electrostatic interaction of both substances, thus targeting injured liver tissue and enhancing the therapeutic effects [59].

The fate of nucleic acid cargos in target cells remains controversial. For example, Kanada et al. suggests that exosomes cannot deliver functional nucleic acids to target cells by detecting differential fates of transfection-loaded biomolecules (plasmid DNA (pDNA), mRNA, and siRNA) delivered to target cells [60].

4.3. MSCs as an Ideal Source of Exosomes for Drug Delivery

Despite the fact that the properties of natural MSC-derived exosomes are disputed and distinctive of different origins, the use of MSC-derived exosomes has been confirmed for the cell type-specific targeting of drug delivery as a better alternative because of several features. First, exosomes do not elicit acute immune rejection, and there is no risk for tumor formation [61]. Second, MSCs are efficient mass producers of exosomes, which can be manufactured large scale in culture [62], providing support for individualized therapy. Third, the safety of exosomes has been confirmed in vivo by different animal models [63, 64]. To achieve cell-specific targeted drug delivery, several studies have tested donor cells, loading methods, and therapeutic cargos of MSC-derived exosomes. Bone marrow stem cells are typically used as the donor cells, and miRNAs are typically used for therapeutic cargos (Table 2). A phase II-III study has also been processed by a group in Egypt, who hypothesized that intravenous infusion of cell-free umbilical cord blood-derived MSC microvesicles may reduce the inflammatory state, thus improving the β-cell mass and glycemic control in patients with type 1 diabetes (T1DM). However, these outcomes remain controversial, particularly in reference to dose responses. The data reported in several studies is highly dependent on the drug-loading of exosomes, not the quantity of exosomes.

Table 2: Studies focusing on MSC-derived exosomes, their loading methods, therapeutic cargos, and biological function.

5. Exosomes for Cell-Free Therapy

Currently, the use of exosomes as early diagnostic tools for various types of cancer is underway. In addition, the use of exosomes as diagnostics for prostate cancer is undergoing FDA-approved tests. While complexities surrounding the therapeutic potential of exosomes continue to unravel, several clinical trials (Table 3, data from http://clinicaltrials.gov) have been completed or are underway in order to evaluate this therapeutic potential. In these trials, largely modified exosomes were used rather than native exosomes.

Table 3: Clinical trials of exosome–based therapies.

6. Conclusion and Perspective

The therapeutic potential of exosomes presents exciting new avenues for intervention in many diseases. The ability instinct to transport genetic messages and to protect the cargos to natural preferential recipient cells has drawn a rapid rise in attention. Therefore, specialized journals and websites have been established to disseminate this continuously unraveling information. While various clinical trials are underway to evaluate the safety and effectiveness of exosomes as therapeutic targets, many issues still remain. Questions regarding how clinical-grade exosomes can be produced in quantity and how various loading and isolation strategies impact the potency of exosome-based drug delivery remain unanswered. Therefore, there is an urgent need to closely examine the following aspects of exosomes: (1) natural therapeutic potential; (2) biogenesis mechanism; and (3) circulation kinetics and biodistribution. There is still a long road ahead, from promising phenomenological observations to clinical applications.

Conflicts of Interest

The authors declare that there is no conflict of interest regarding the publication of this article.

Acknowledgments

This study was supported by grants from the National Natural Science Foundation of China (81302242), Jilin Province Science and Technology Funds (20150204007YY and 20140204022YY), and Jilin Province Development and Reform Commission funds (2014G073 and 2016C046-2).

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Stem Cells Offer Hope for Hair Growth

UCLA researchers have discovered a new way to activate the stem cells in the hair follicle to make hair grow. The research may lead to new drugs that could promote hair growth for people with baldness or alopecia, which is hair loss associated with such factors as hormonal imbalance, stress, aging or chemotherapy. Hair follicle stem cells are long-lived cells in the hair follicle that are present in the skin and produce hair throughout a person’s lifetime. They are quiescent, meaning they are normally inactive, but they quickly activate during a new hair cycle, which is when new hair growth occurs. The quiescence of hair follicle stem cells is regulated by many factors. In certain cases, they fail to activate, which is what causes hair loss.

The study by Heather Christofk, PhD, and William Lowry, PhD, both of the Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research at UCLA, found that hair follicle stem cell metabolism is different from other cells of the skin. Cellular metabolism involves the breakdown of the nutrients needed for cells to divide, make energy and respond to their environment. The process of metabolism uses enzymes that alter these nutrients to produce metabolites. As hair follicle stem cells consume the nutrient glucose — a form of sugar — from the bloodstream, they process the glucose to eventually produce a metabolite called pyruvate. The cells then can send pyruvate to their mitochondria — the part of the cell that creates energy — or convert pyruvate into another metabolite called lactate.

The research team first blocked the production of lactate genetically in mice and showed that this prevented hair follicle stem cell activation. Conversely, in collaboration with the Rutter lab at the University of Utah, they increased lactate production genetically in the mice, which accelerated hair follicle stem cell activation, increasing the hair cycle.

The team identified two drugs that, when applied to the skin of mice, influenced hair follicle stem cells in distinct ways to promote lactate production. The first drug, called RCGD423, activates a cellular signaling pathway called JAK-Stat, which transmits information from outside the cell to the nucleus of the cell. The research showed that JAK-Stat activation leads to the increased production of lactate, and this in turn drives hair follicle stem cell activation and quicker hair growth. The other drug, called UK5099, blocks pyruvate from entering the mitochondria, which forces the production of lactate in the hair follicle stem cells and accelerates hair growth in mice.

“Lactate Dehydrogenase Activity Drives Hair Follicle Stem Cell Activation,” Nature Cell Biology, August 14, 2017

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ISSCA introduces new stem cell training courses web page for regenerative medicine practitioners

ISSCA has launched a new stem cell training web page designed to offer free information and resources to help physicians choose a training program best suited to their unique needs.

MIAMI, June 26, 2018—The International Society for Stem Cell Application (ISSCA) has launched a new stem cell training course web page, coordinated by Global Stem Cells Group affiliate Stem Cell Training, designed to help physicians access free information and resources on the newest instruction and training options in regenerative medicine training.

The new web page is designed to help physicians interested in adding stem cell procedures to grow their medical practice or enhance career advancement opportunities find stem cell training program options to enable them to find a training program best suited to their individual needs.  ISSCA’s variety of stem cell training opportunities include:

• Online stem cell training course, ISSCA’s cutting-edge online course that teaches physicians everything they need to know to add adult stem cell-based procedures to their existing practice, or confidently transition to a regenerative medicine center. Offering the convenience of training from a home or office computer, this course prepares physicians in all the theoretical and practical knowledge needed to effectively and expertly administer stem cell therapies to patients, including harvesting and isolating stem cells.

ISSCA’s online training positions physicians to open their own stem cell center practice and join ISSCA’s expansive network. Successful completion of the online training course allows physicians to immediately begin offering cutting-edge regenerative medicine procedures to patients, establish themselves as experts in their fields, and enjoy the benefits of the growing regenerative medicine industry.

• Hands-on stem cell certification training courses, ISCCA’s intensive, two-day hands-on training course scheduled at various international locations provides attending physicians with expert instruction on autologous stem cell therapies in the field of regenerative medicine. Participants learn techniques and protocols for harvesting and isolating stem and regenerative cells from adipose tissue, bone marrow, and /or peripheral blood from live patients and administering the cells back to the patient

Course curriculum consists of comprehensive theoretical lectures and home study education, and two days of didactic and clinical experience. One day of post-educational on-site clinical assistance is also available upon request.

• Onsite training, ISSCA’s personalized, hands-on, onsite stem cell training brings stem cell specialists to your practice or clinic, anywhere in the world, to provide one-on-one training tailored to your practice’s specific requirements—saving time and money. The onsite training program offers participants a unique opportunity to grow their practice and achieve their specific practice goals by offering practice-specific regenerative medicine treatments to patients in their medical office or clinical setting.

The onsite training course provides participating practices with personalized theoretical information and hands-on training along with ongoing support for their clinical practice. Applications and protocols are provided by a Stem Cells Training faculty member with extensive experience in laboratory and clinical practice.

ISSCA’s onsite training specifications include:
1. Equipment and supply delivery. The Stem Cell Training team
delivers and sets up all equipment and supplies necessary for the            training session to take place and will leave the physician’s team
fully qualified to start its own stem cell treatment practice.

2. Expert trainers. ISSCA’s onsite stem cell training course takes a highly visual and interactive approach. Expert trainers teach and supervise the hands-on process using live patients and different protocols for the extraction, isolation, and application of PRP, adipose- and bone marrow-derived stem cells.

3. Multimedia access. ISSCA provides physicians participating in its onsite training program access to its library of high-resolution, step-by-step procedure videos and ongoing online and telephone support for clinical equipment, inquiries or concerns for the practice’s future use and reference.

• Fellowship in cell therapy and tissue engineering. Recognizing the need for knowledge of stem cell protocols among physicians and healthcare professionals, ISSCA and Stem Cell Training created the Fellowship of Stem Cell Therapy and Tissue Engineering program. The fellowship focuses on stem cell therapies involving the potential replacement of cells or organs that are diseased, injured, infirmed, ailing or aged

In this modular training program, a group of experienced academic scholars involved in stem cell transplantation present a series of topics covering the general principles and practices of stem cell
biology and evidence-based treatments that physicians can apply to optimize the health of their patients. Fellowship course details and objectives include:

• A detailed program offering hands-on experience in stem cell characterization and laboratory applications
• An opportunity to learn cell culture processes including plating, trypsinization, harvesting, and cryopreservation
• Gaining the ability to understand and apply quality control tests including cell count, viability, flow cytometry, endotoxin, mycoplasma, and sterility
• Learning to perform CGMP functions including clean room maintenance, gowning, and environmental monitoring
• Establishing insight on relevant applications of stem cell processing and regulations that apply to a certified facility
• Receiving the tools necessary to implement regulatory and clinical guidelines when setting up a GMP facility
• Providing participants with copies of presentations, procedural protocols, and all forms associated with a GMP facility, as well as case books and full protocols for approximately 30 indications
• Demonstrating the ability to perform clinical procedures including lipoaspirate and bone marrow isolation, and reintroduction of stem cells for various indications

The new ISSCA stem cell training web page also features an informative blog that publishes four new articles in the field of regenerative medicine weekly.

To learn more, visit the ISSCA stem cell training web page, email info@stemcellsgroup.com, or call 305-560-5337.

About ISSCA:

The International Society for Stem Cell Application (ISSCA) is a multidisciplinary community of scientists and physicians, all of whom aspire to treat diseases and lessen human suffering through advances in science, technology and the practice of regenerative medicine. ISSCA serves its members through advancements made in the specialty of regenerative medicine.

The ISSCA’s vision is to take a leadership position in promoting excellence and setting standards in the regenerative medicine fields of publication, research, education, training, and certification.

As a medical specialty, regenerative medicine standards and certifications are essential, which is why ISSCA offers certification training in cities all over the world. The goal is to encourage more physicians to practice regenerative medicine and make it available to benefit patients both nationally and globally. Incorporated under the Republic of Korea as a non-profit entity, ISSCA is focused on promoting excellence and standards in the field of regenerative medicine.

Stem cell training web page launch

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Adimarket announces launch of Cellgenic stem cell protein extract hair restoration product

GSCG affiliate Adimarket announces the launch of the Cellgenic adipose-derived stem cell hair restoration application that maximizes the skin and hair follicles’ own revitalizing capabilities.

MIAMI, June 26, 2018—Global Stem Cells Group (GSCG) affiliate Adimarket announces the launch of the Cellgenic adipose-derived stem cells protein extract (CADPE) hair restoration application product.

CADPE combines refined growth factor proteins extracted from human adipose-derived stem cells in a conditioned media and a unique protein formula, to maximize the revitalizing characteristic of skin and hair follicles.

CADPE increases the reproduction of human follicles’ dermal papilla cells, which consist of a distinct population of specialized fibroblasts important in morphogenesis (differentiation and growth) of the hair follicle structure and control of the hair growth cycle, CADPE works by turning over dying skin cells at twice the frequency of normal skin,

CADPE benefits:

• Use of active proteins derived from human sources eliminates concerns with allergic reactions and skin irritation

• The natural composition of the product’s various growth factors acquired from adipose-derived stem cells can provide exceptional biological activity

• CADPE is multi-functioning, exhibiting anti-oxidation and hair re-growth effects

• Each growth factor has a pharmacological effect, but the combination of growth factors has a synergistic effect that can enhance the pharmacological action of single proteins.

• No special training is needed to learn how to use CADPE

• The CADPE application procedure is shorter than other hair restoration protocols, which can take up to eight hours per patient

• CADPE is supported by scientific evidence

When used by aesthetic practitioners, CADPE provides safe, cutting-edge hair thickening and hair follicle proliferation results that are CTFA-approved, take less application time than other hair restoration processes, and is backed by medical research.

Cellgenic adipose-derived stem cells protein extract can be purchased online at the Adimarket online store. For more information, visit the Adimarket website, email info@stemcellsgroup.com, or call 305-560-5337.

About Adimarket:
AAPE productsAdimarket, Inc., a division of the Global Stem Cells Group, is a one-stop, cost-competitive online marketplace for quality regenerative medicine equipment and supplies for physicians and healthcare professionals.

Adimarket was founded to provide practitioners the tools they need to practice regenerative medicine in a medical office setting. Motivated by a firm belief in the impact stem cell medicine can have when dispensed in a doctor’s office, Adimarket provides physicians with the tools they need to provide patients with cutting-edge treatments.

About Global Stem Cells Group:
Global Stem Cells Group (GSCG) is a worldwide network that combines seven major medical corporations. Each corporation is focused on furthering scientific and technological advancements in cutting-edge stem cell research, development, treatment, and training. The united efforts of GSCG’s affiliate companies provide medical practitioners with a one-stop epicenter for stem cell solutions that adhere to the highest medical standards.

Global stem cell’s mission is to be the largest recognized stem cell and regenerative medicine network in the world.

CADPE stem cell hair restoration application

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Global Stem Cells Group to sponsor the American Association of Stem Cell Physicians summit in Miami

Global Stem Cells Group will sponsor the American Association of Stem Cell Physicians summit in Miami August 10 – 12, 2018.

MIAMI, June 18, 2018—Global Stem Cells Group (GSCG), a world leader in regenerative medicine, announces its sponsorship of the American Association of Stem Cell Physicians (AAOSCP) summit in Miami, August 12-14, 2018. The conference will offer three days of educational, workshop, and networking events with physicians and researchers from around the world in the fields of stem cell and regenerative medicine. Attending physicians can earn up to 24 CME credits.

Summit attendees will have the opportunity to learn about Adimarket, GSCG’S fast-growing online store for regenerative medicine practitioners to conveniently purchase products, supplies, and equipment that meets their specific clinical needs.

GSCG affiliate Stem Cell Training, Inc. (SCT) will also be on hand to provide qualified Summit attendees with personalized, hands-on regenerative medicine training course at the summit, which will be conducted by expert instructors who guide qualified physicians through the intensive, two-day certification program. Benefits of this stem cell training course include:

  • Stem Cell Training’s state-of-the-art, one-on-one regenerative medicine training on the latest stem cell procedures and protocols to use immediately in private clinical practice
  • Access to SCT’s online resources, personalized theoretical information, and hands-on training with live patients, as well as ongoing support for each participating physician’s clinical practice
  • Stem cell applications and protocols demonstrated by an SCT faculty member with extensive experience in laboratory and clinical practices

Physicians and businesses professionals in the field of regenerative medicine, the AAOSCP summit offers an outstanding opportunity to connect with others in the industry, explore, learn, and make connections while learning about the latest groundbreaking treatments and technologies. Medical students and those seeking careers on the business side of the regenerative medicine market can take advantage of the valuable opportunity the summit offers to network with potential employers while learning about groundbreaking treatments and therapies.

Since 2014, Global Stem Cells Group has worked with some of the most prestigious regenerative medicine practitioners in the U.S., South America, and Asia as it focuses on growing its services throughout the global community. Stem cell therapies continue to revolutionize the healthcare industry while offering new hope for sufferers of chronic, debilitating conditions.

For more information and to register for the summit, visit the AAOSCP website, email info@stemcellsgroup.com, or call 305-560-5337.

About Global Stem Cells Group

Global Stem Cells Group (GSCG)  is a worldwide network that combines seven major medical corporations. Each corporation is focused on furthering scientific and technological advancements in cutting-edge stem cell research, development, treatment, and training. The united efforts of GSCG’s affiliate companies provide medical practitioners with a one-stop epicenter for stem cell solutions that adhere to the highest medical standards.

Global stem cell’s mission is to be the largest recognized stem cell and regenerative medicine network in the world.

American Association of  Stem Cell Physicians summit

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ISSCA to sponsor XX International Congress of Aesthetic Medicine, Aesthetic Surgery and Obesity in Mexico City

ISSCA will sponsor the XX International Congress of Aesthetic Medicine, Aesthetic Surgery and Obesity in Mexico City July 13, 14 and 15, 2018. This will mark the international stem cell organization’s third consecutive year sponsoring the event.

MIAMI, June 18, 2018—The International Society for Stem Cell Application (ISSCA), will sponsor the XX International Congress of Aesthetic Medicine, Aesthetic Surgery and Obesity in Mexico City July 13, 14 and 15, 2018. The event marks ISSCA’s third consecutive year of sponsorship for the event, expected to attract aesthetic and regenerative medicine physicians from around the world.

ISSCA affiliate Global Stem Cells Group (GSCG) will launch its newest regenerative medicine products for the aesthetic market and present master classes for Congress attendees in clinical stem cell applications digital marketing for aesthetic practices:
• Clinical Stem Cell Applications master class conducted by GSCG Research Director Maritza Novas, stem cell application and anti-aging specialist.
• Social Media marketing master class Digital Marketing: A New Challenge to the Aesthetic Market, conducted by Benito Novas, Global Stem Cells Group CEO, and medical marketing specialist.

Global Stem Cells Group will also launch its Cellgenic Hair adipose-derived stem cell (ADSC) proteins extract (AAPE). Containing a mixture of refined growth factor proteins extracted from human stem cells, AAPE’s conditioned media offers a unique protein formula that maximizes the revitalizing capabilities in skin and hair follicles.

Key factors of AAPE include:

  • Human proteins
  • Active proteins are derived from human sources with no risk of allergic reactions or skin irritation
  • The natural composition of assorted growth factors derived from ADSCs can provide the best biological activity
  • Synergistic effect: each growth factor has a unique pharmacological effect, and the combination AAPE’s of growth factors may enhance the pharmacological action of a single protein.
  • Multi-function: AAPE demonstrates anti-oxidation, skin whitening, and hair regrowth capabilities.

The conference will be held at the Hotel Fiesta Americana Reforma in Mexico City.

To learn more about registering to attend, please visit the XX International Congress of Aesthetic Medicine, Aesthetic Surgery, and Obesity website, email mailto:info@stemcellsgroup.com, or call 305-560-5337.

About ISSCA:

The International Society for Stem Cell Application (ISSCA) is a multidisciplinary community of scientists and physicians, all of whom aspire to treat diseases and lessen human suffering through advances in science, technology and the practice of regenerative medicine. ISSCA serves its members through advancements made to the specialty of regenerative medicine.

The ISSCA’s vision is to take a leadership position in promoting excellence and setting standards in the regenerative medicine fields of publication, research, education, training, and certification.

As a medical specialty, regenerative medicine standards and certifications are essential, which is why ISSCA offers certification training in cities all over the world. The goal is to encourage more physicians to practice regenerative medicine and make it available to benefit patients both nationally and globally. Incorporated under the Republic of Korea as a non-profit entity, the ISSCA is focused on promoting excellence and standards in the field of regenerative medicine.

About Global Stem Cells Group:

Global Stem Cells Group (GSCG) is a worldwide network that combines seven major medical corporations, each focused on furthering scientific and technological advancements to lead cutting-edge stem cell development, treatments, and training. The united efforts of GSCG’s affiliate companies provide medical practitioners with a one-stop hub for stem cell solutions that adhere to the highest medical standards.

Global Stem Cell’s mission is to be the largest recognized stem cell and regenerative medicine network in the world.

XX International Congress of Aesthetic Medicine, Aesthetic Surgery and Obesity

 

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ISSCA to conduct second stem cell certification training course in Lima, Peru

ISSCA to conduct a second hands-on regenerative medicine certification training course in Lima, Peru, Peru August 31, 2018.

MIAMI, June 7, 2018—In response to the success of a recent stem cell certification course in Lima, Peru, the International Society for Stem Cell Application (ISSCA) has announced plans to hold a second stem cell certification training course for qualified physicians in Lima on August 31, 2018.

ISSCA, the only stem cells organization able to travel around the world to teach stem cell harvesting protocols to physicians, conducted the first course in Lima in May. Eight Peruvian physicians were provided highly personalized, hands-on training in harvesting and isolating adipose- and bone marrow-derived stem cells from four live patients under the guidance of stem cell training experts.

Each participating physician obtains the intellectual property of 22 proprietary protocols that will them to treat degenerative and aesthetic diseases and conditions in their offices. Step-by-step videos of each protocol are provided to physicians for later referral.

Participating physicians acquire the skills necessary to offer an alternative therapy to patients with medical conditions for which no solution is currently available. ISSCA’s stem cell training course allows qualified physicians who earn certification to offer sought-after alternative treatments.

Successful completion of the ISSCA regenerative medicine certification course allows physicians to join a select group of practitioners at the forefront of medical science. Only 5 percent of physicians worldwide access to stem cell therapy studies, and so far only 0.01 percent are practicing these therapies.

The course also provides participating physicians with access to ISSCA’s online stem cell training course to review all content and procedures introduced during the two-day clinical training course, as well as patient forms and guidelines, procedures, informed consent forms, didactic lectures, training booklets, and more,

The ISSCA’s regenerative medicine protocols training course was developed for physicians and high-level practitioners to learn techniques in harvesting and reintegrating stem cells derived from patients’ adipose tissue and bone marrow.

Seating is limited to eight participants. Register today at the Lima Peru course website to secure a seat,  email info@stemcellsgroup.com, or call 305-560-5337.

About ISSCA:

The International Society for Stem Cell Application (ISSCA) is a multidisciplinary community of scientists and physicians, all of whom aspire to treat diseases and lessen human suffering through advances in science, technology and the practice of regenerative medicine. ISSCA serves its members through advancements made in the specialty of regenerative medicine.

The ISSCA’s vision is to take a leadership position in promoting excellence and setting standards in the regenerative medicine fields of publication, research, education, training, and certification.

As a medical specialty, regenerative medicine standards and certifications are essential, which is why ISSCA offers certification training in cities all over the world. The goal is to encourage more physicians to practice regenerative medicine and make it available to benefit patients both nationally and globally. Incorporated under the Republic of Korea as a non-profit entity, the ISSCA is focused on promoting excellence and standards in the field of regenerative medicine.

Stem cell training Lima Peru

 

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Global Stem Cells Group Announces the First International Meeting on Marketing in Aesthetic Medicine

Global Stem Cells Group announces the first international meeting on marketing in aesthetic medicine August 24, 2018 in Buenos Aires, Argentina.

MIAMI, April 19, 2018—Global Stem Cells Group founder Benito Novas announces the first international meeting on marketing in aesthetic medicine, to be held at the Medicine Faculty of Universidad de Buenos Aires August 24, 2018.

Marketing for aesthetic medicine practices

Novas, a global entrepreneur and medical marketing strategist in the fields of biotechnology, life sciences, and healthcare development, will lead a team of experts who will share strategies for marketing an aesthetic medicine practice.

The meeting agenda will provide attendees with tools and insights for promoting their practices, with topics including:
 
 

  • How to manage social media to recruit more patients
  • How to use Instagram and email marketing
  • How to use content marketing to attract target audiences
  • Promoting an aesthetic clinic in the digital era
  • Influencer marketing

Novas, CEO of Global Stem Cells Group and Aesthetic Marketing Group, will be the event’s keynote speaker. He will share his expertise in digital marketing, the latest marketing tools for managing an aesthetic medicine practice, and other strategies for promoting physician practices.

“Consumers spend at least three hours per day on social media sites, which makes social media a valuable tool for attracting patients,” Novas says. “Physicians and medical practice administrators who participate in this meeting can learn how to leverage the power of online resources like Twitter, Facebook, and Instagram to reach target audiences, increase leads, and effectively recruit new patients.

Attendees will also learn about consumer behavior patterns in their search for products and services in the digital age. Most potential patients search Google to find an aesthetic medicine practice that offers the products and procedures they are looking for.

Content marketing and other strategies presented at this meeting will help aesthetic practices maximize opportunities to attract potential patients by enhancing online visibility and increasing engagement with target audiences.

Additional speakers will include:

  • Hector Portilla, communications and advertising specialist and director of Medestica Digital Portal, who will discuss marketing strategies 
    for the development of cosmetic and aesthetic medicine centers
  • Tamara Paez, Espana, business consultant and author of Marketing Digital en su clinica Estetica (co-authored by Novas)
  • Andrea Lapeire, plastic surgeon, Argentina  
  • Dario Parada, owner, and founder of Grupo NOTO S.A., Argentina
  • Alex Novas, Chief Marketing Officer, Global Stem Cells Group U.S.

To learn more about attending Global Stem Cells Group’s first international meeting on marketing in aesthetic medicine email info@stemcellsgroup.com, or send a text via WhatsApp to +1 786 238 2170

About Global Stem Cells Group:

Global Stem Cells Group (GSCG) is a worldwide network that combines seven major medical corporations, each focused on furthering scientific and technological advancements to lead cutting-edge stem cell development, treatments, and training. The united efforts of GSCG’s affiliate companies provide medical practitioners with a one-stop hub for stem cell solutions that adhere to the highest medical standards.
                                                    
Global stem cell’s mission is to be the largest recognized stem cell and regenerative medicine network in the world.

Marketing for aesthetic medicine practices

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