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Zhou J, Cui H, Lu H, Xu Z, Feng W, Chen L, Jin X, Yang X, Qi Z. Muscle-derived stem cells in peripheral nerve regeneration: reality or illusion? Regen Med 2017. [PMID: 28621200 DOI: 10.2217/rme-2016-0165] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Owing to the complicated and time-consuming regenerative process, the repair of injured peripheral nerves depends largely on ongoing stem-cell therapy. Decades ago, researchers successfully isolated and identified muscle-derived stem cells (MDSCs) and discovered their potential for multidifferentiation. MDSCs play an important role in trauma repair associated with neuromuscular and vascular injury by simultaneously promoting tissue regrowth via direct differentiation and systematic secretion under physiological conditions. However, the isolation, culture, induction and application of MDSCs require further methodological analysis before clinical application. In this review, we comprehensively discuss the challenges associated with neural regeneration and reviewed the progress of stem cell based regenerative medicine, in an effort to realize the potential of MDSCs in nerve regeneration.
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Affiliation(s)
- Jing Zhou
- Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100730, PR China
| | - Haiyan Cui
- Department of Plastic & Reconstructive Surgery, Shanghai 9th People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, PR China
| | - Haibin Lu
- Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100730, PR China
| | - Zhuqiu Xu
- Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100730, PR China
| | - Weifeng Feng
- Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100730, PR China
| | - Lulu Chen
- Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100730, PR China
| | - Xiaolei Jin
- Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100730, PR China
| | - Xiaonan Yang
- Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100730, PR China
| | - Zuoliang Qi
- Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100730, PR China
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Kannaiyan J, Muthukutty P, Iqbal MDT, Paulraj B. Villous Chorion: A Potential Source for Pluripotent-like Stromal Cells. J Nat Sci Biol Med 2017; 8:221-228. [PMID: 28781492 PMCID: PMC5523533 DOI: 10.4103/0976-9668.210011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Context: Multipotent stromal cells are isolated from various fetal sources and studied for their phenotypic characterization and ability to differentiate into different lineages. Aims: In this study, we aimed to isolate mesenchymal stem or stromal cells (MSCs) from villous chorion, expand under clinical scale level, compared the potency with other source of fetal-derived MSCs and studied their differentiation capabilities to form all three germ layers. Subjects and Methods: Placenta obtained from C-section was used to isolate villous chorion-MSCs (VC-MSCs) were expanded up to tenth passage and their characteristics were assessed by proliferation rate and phenotypic characterization using fluorescence-activated cell sorting and also expanded MSCs were analyzed for differentiated into all three germ layers by cytochemical staining. Results: Stem cell isolated from VC yielded up to 2.16 × 109 cells at second passage and 3.06–4.23 × 104 cells/cm2 at tenth passage. The total yield of cells with all three sources analysis showed that VC has a low yield at second passage compared to amniotic membrane and Wharton's jelly, but the VC-MSCs yield significant amount in lesser days. The phenotypic characterization revealed positive for CD73, CD90, and CD105 and negative for CD79, CD34, CD45, human leukocyte antigen-DR proving their stemness even at tenth passage. They can able to differentiate into ectodermic neural cells, endodermic hepatocytes, and mesodermal differentiation of chondrocytes, adipocytes, and osteogenic cells proving their ability to differentiate into all three germ layers. Conclusions: This result suggests that the VC-MSCs are ideal source of stem cells with similar characteristics such as other adult stem cells. Thus, VC-derived MSCs can be potential clinical source in regenerative medicine.
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Affiliation(s)
| | - Palaniyandi Muthukutty
- Department of Tissue Culture, Stem Cell Division, Unistem Biosciences Pvt. Ltd., Gurgaon, Haryana, India
| | - M D Tabish Iqbal
- Department of Tissue Culture, Stem Cell Division, Unistem Biosciences Pvt. Ltd., Gurgaon, Haryana, India
| | - Balaji Paulraj
- Department of Biotechnology, M.G.R College, Hosur, Tamil Nadu, India
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Jung AR, Kim RY, Kim HW, Shrestha KR, Jeon SH, Cha KJ, Park YH, Kim DS, Lee JY. Nanoengineered Polystyrene Surfaces with Nanopore Array Pattern Alters Cytoskeleton Organization and Enhances Induction of Neural Differentiation of Human Adipose-Derived Stem Cells. Tissue Eng Part A 2016; 21:2115-24. [PMID: 25919423 DOI: 10.1089/ten.tea.2014.0346] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Human adipose-derived stem cells (hADSCs) can differentiate into various cell types depending on chemical and topographical cues. One topographical cue recently noted to be successful in inducing differentiation is the nanoengineered polystyrene surface containing nanopore array-patterned substrate (NP substrate), which is designed to mimic the nanoscale topographical features of the extracellular matrix. In this study, efficacies of NP and flat substrates in inducing neural differentiation of hADSCs were examined by comparing their substrate-cell adhesion rates, filopodia growth, nuclei elongation, and expression of neural-specific markers. The polystyrene nano Petri dishes containing NP substrates were fabricated by a nano injection molding process using a nickel electroformed nano-mold insert (Diameter: 200 nm. Depth of pore: 500 nm. Center-to-center distance: 500 nm). Cytoskeleton and filopodia structures were observed by scanning electron microscopy and F-actin staining, while cell adhesion was tested by vinculin staining after 24 and 48 h of seeding. Expression of neural specific markers was examined by real-time quantitative polymerase chain reaction and immunocytochemistry. Results showed that NP substrates lead to greater substrate-cell adhesion, filopodia growth, nuclei elongation, and expression of neural specific markers compared to flat substrates. These results not only show the advantages of NP substrates, but they also suggest that further study into cell-substrate interactions may yield great benefits for biomaterial engineering.
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Affiliation(s)
- Ae Ryang Jung
- 1 Department of Urology, Seoul St. Mary's Hospital, The Catholic University of Korea , Seoul, Korea
| | - Richard Y Kim
- 1 Department of Urology, Seoul St. Mary's Hospital, The Catholic University of Korea , Seoul, Korea
| | - Hyung Woo Kim
- 2 Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH) , Pohang, Korea
| | - Kshitiz Raj Shrestha
- 1 Department of Urology, Seoul St. Mary's Hospital, The Catholic University of Korea , Seoul, Korea
| | - Seung Hwan Jeon
- 1 Department of Urology, Seoul St. Mary's Hospital, The Catholic University of Korea , Seoul, Korea
| | - Kyoung Je Cha
- 2 Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH) , Pohang, Korea
| | - Yong Hyun Park
- 1 Department of Urology, Seoul St. Mary's Hospital, The Catholic University of Korea , Seoul, Korea
| | - Dong Sung Kim
- 2 Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH) , Pohang, Korea
| | - Ji Youl Lee
- 1 Department of Urology, Seoul St. Mary's Hospital, The Catholic University of Korea , Seoul, Korea
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Sriramoju B, Kanwar RK, Kanwar JR. Nanoformulated Mutant SurR9-C84A: a Possible Key for Alzheimer’s and its Associated Inflammation. Pharm Res 2015; 32:2787-97. [DOI: 10.1007/s11095-015-1664-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2015] [Accepted: 03/02/2015] [Indexed: 01/25/2023]
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Lavasani M, Thompson SD, Pollett JB, Usas A, Lu A, Stolz DB, Clark KA, Sun B, Péault B, Huard J. Human muscle-derived stem/progenitor cells promote functional murine peripheral nerve regeneration. J Clin Invest 2014; 124:1745-56. [PMID: 24642464 DOI: 10.1172/jci44071] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2012] [Accepted: 01/16/2014] [Indexed: 12/16/2022] Open
Abstract
Peripheral nerve injuries and neuropathies lead to profound functional deficits. Here, we have demonstrated that muscle-derived stem/progenitor cells (MDSPCs) isolated from adult human skeletal muscle (hMDSPCs) can adopt neuronal and glial phenotypes in vitro and ameliorate a critical-sized sciatic nerve injury and its associated defects in a murine model. Transplanted hMDSPCs surrounded the axonal growth cone, while hMDSPCs infiltrating the regenerating nerve differentiated into myelinating Schwann cells. Engraftment of hMDSPCs into the area of the damaged nerve promoted axonal regeneration, which led to functional recovery as measured by sustained gait improvement. Furthermore, no adverse effects were observed in these animals up to 18 months after transplantation. Following hMDSPC therapy, gastrocnemius muscles from mice exhibited substantially less muscle atrophy, an increase in muscle mass after denervation, and reorganization of motor endplates at the postsynaptic sites compared with those from PBS-treated mice. Evaluation of nerve defects in animals transplanted with vehicle-only or myoblast-like cells did not reveal histological or functional recovery. These data demonstrate the efficacy of hMDSPC-based therapy for peripheral nerve injury and suggest that hMDSPC transplantation has potential to be translated for use in human neuropathies.
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Lavasani M, Pollett JB, Usas A, Thompson SD, Pollett AF, Huard J. The microenvironment-specific transformation of adult stem cells models malignant triton tumors. PLoS One 2013; 8:e82173. [PMID: 24349213 PMCID: PMC3857244 DOI: 10.1371/journal.pone.0082173] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Accepted: 10/31/2013] [Indexed: 11/25/2022] Open
Abstract
Here, we demonstrated the differentiation potential of murine muscle-derived stem/progenitor cells (MDSPCs) toward myogenic, neuronal, and glial lineages. MDSPCs, following transplantation into a critical-sized sciatic nerve defect in mice, showed full regeneration with complete functional recovery of the injured peripheral nerve at 6 weeks post-implantation. However, several weeks after regeneration of the sciatic nerve, neoplastic growths were observed. The resulting tumors were malignant peripheral nerve sheath tumors (MPNSTs) with rhabdomyoblastic differentiation, expressing myogenic, neurogenic, and glial markers, common markers of human malignant triton tumors (MTTs). No signs of tumorigenesis were observed 17 weeks post-implantation of MDSPCs into the gastrocnemius muscles of dystrophic/mdx mice, or 1 year following subcutaneous or intravenous injection. While MDSPCs were not oncogenic in nature, the neoplasias were composed almost entirely of donor cells. Furthermore, cells isolated from the tumors were serially transplantable, generating tumors when reimplanted into mice. However, this transformation could be abrogated by differentiation of the cells toward the neurogenic lineage prior to implantation. These results establish that MDSPCs participated in the regeneration of the injured peripheral nerve but transformed in a microenvironment- and time-dependent manner, when they likely received concomitant neurogenic and myogenic differentiation signals. This microenvironment-specific transformation provides a useful mouse model for human MTTs and potentially some insight into the origins of this disease.
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Affiliation(s)
- Mitra Lavasani
- Stem Cell Research Center, Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- * E-mail: (JH); (ML)
| | - Jonathan B. Pollett
- Stem Cell Research Center, Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- Allegheny-Singer Research Institute, Pittsburgh, Pennsylvania, United States of America
| | - Arvydas Usas
- Stem Cell Research Center, Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Seth D. Thompson
- Stem Cell Research Center, Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Aaron F. Pollett
- Pathology and Laboratory Medicine, Mount Sinai Hospital, Toronto, Ontario, Canada
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
| | - Johnny Huard
- Stem Cell Research Center, Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- Department of Molecular Genetics and Biochemistry, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- * E-mail: (JH); (ML)
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Derivation of neural stem cells from human adult peripheral CD34+ cells for an autologous model of neuroinflammation. PLoS One 2013; 8:e81720. [PMID: 24303066 PMCID: PMC3841177 DOI: 10.1371/journal.pone.0081720] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Accepted: 10/23/2013] [Indexed: 12/31/2022] Open
Abstract
Proinflammatory factors from activated T cells inhibit neurogenesis in adult animal brain and cultured human fetal neural stem cells (NSC). However, the role of inhibition of neurogenesis in human neuroinflammatory diseases is still uncertain because of the difficulty in obtaining adult NSC from patients. Recent developments in cell reprogramming suggest that NSC may be derived directly from adult fibroblasts. We generated NSC from adult human peripheral CD34+ cells by transfecting the cells with Sendai virus constructs containing Sox2, Oct3/4, c-Myc and Klf4. The derived NSC could be differentiated to glial cells and action potential firing neurons. Co-culturing NSC with activated autologous T cells or treatment with recombinant granzyme B caused inhibition of neurogenesis as indicated by decreased NSC proliferation and neuronal differentiation. Thus, we have established a unique autologous in vitro model to study the pathophysiology of neuroinflammatory diseases that has potential for usage in personalized medicine.
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Intrinsic ability of adult stem cell in skeletal muscle: an effective and replenishable resource to the establishment of pluripotent stem cells. Stem Cells Int 2013; 2013:420164. [PMID: 23818907 PMCID: PMC3684130 DOI: 10.1155/2013/420164] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2012] [Revised: 04/03/2013] [Accepted: 05/07/2013] [Indexed: 02/06/2023] Open
Abstract
Adult stem cells play an essential role in mammalian organ maintenance and repair throughout adulthood since they ensure that organs retain their ability to regenerate. The choice of cell fate by adult stem cells for cellular proliferation, self-renewal, and differentiation into multiple lineages is critically important for the homeostasis and biological function of individual organs. Responses of stem cells to stress, injury, or environmental change are precisely regulated by intercellular and intracellular signaling networks, and these molecular events cooperatively define the ability of stem cell throughout life. Skeletal muscle tissue represents an abundant, accessible, and replenishable source of adult stem cells. Skeletal muscle contains myogenic satellite cells and muscle-derived stem cells that retain multipotent differentiation abilities. These stem cell populations have the capacity for long-term proliferation and high self-renewal. The molecular mechanisms associated with deficits in skeletal muscle and stem cell function have been extensively studied. Muscle-derived stem cells are an obvious, readily available cell resource that offers promise for cell-based therapy and various applications in the field of tissue engineering. This review describes the strategies commonly used to identify and functionally characterize adult stem cells, focusing especially on satellite cells, and discusses their potential applications.
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Lavasani M, Lu A, Thompson SD, Robbins PD, Huard J, Niedernhofer LJ. Isolation of muscle-derived stem/progenitor cells based on adhesion characteristics to collagen-coated surfaces. Methods Mol Biol 2013; 976:53-65. [PMID: 23400434 DOI: 10.1007/978-1-62703-317-6_5] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Our lab developed and optimized a method, known as the modified pre-plate technique, to isolate stem/progenitor cells from skeletal muscle. This method separates different populations of myogenic cells based on their propensity to adhere to a collagen I-coated surface. Based on their surface markers and stem-like properties, including self-renewal, multi-lineage differentiation, and ability to promote tissue regeneration, the last cell fraction or slowest to adhere to the collagen-coated surface (pre-plate 6; pp6) appears to be early, quiescent progenitor cells termed muscle-derived stem/progenitor cells (MDSPCs). The cell fractions preceding pp6 (pp1-5) are likely populations of more committed (differentiated) cells, including fibroblast- and myoblast-like cells. This technique may be used to isolate MDSPCs from skeletal muscle of humans or mice regardless of age, sex or disease state, although the yield of MDSPCs varies with age and health. MDSPCs can be used for regeneration of a variety of tissues including bone, articular cartilage, skeletal and cardiac muscle, and nerve. MDSPCs are currently being tested in clinical trials for treatment of urinary incontinence and myocardial infarction. MDSPCs from young mice have also been demonstrated to extend life span and healthspan in mouse models of accelerated aging through an apparent paracrine/endocrine mechanism. Here we detail methods for isolation and characterization of MDSPCs.
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Affiliation(s)
- Mitra Lavasani
- Department of Orthopaedic Surgery, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
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10
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Huang M, Guo Z, Liu K, Mei X, Fang S, Zeng J, Wang Y, Yuan Y. Protein hairy enhancer of split-1 expression during differentiation of muscle-derived stem cells into neuron-like cells. Neural Regen Res 2012; 7:2182-7. [PMID: 25538738 PMCID: PMC4268716 DOI: 10.3969/j.issn.1673-5374.2012.028.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2012] [Accepted: 07/24/2012] [Indexed: 11/25/2022] Open
Abstract
Muscle-derived stem cells were isolated from the skeletal muscle of Sprague-Dawley neonatal rats aged 3 days old. Cells at passage 5 were incubated in Dulbecco's modified Eagle's medium supplemented with 10% (v/v) fetal bovine serum, 20 μg/L nerve growth factor, 20 μg/L basic fibroblast growth factor and 1% (v/v) penicillin for 6 days. Cells presented with long processes, similar to nerve cells. Connections were formed between cell processes. Immunocytochemical staining with neuron specific enolase verified that cells differentiated into neuron-like cells. Immunofluorescence cytochemistry and western blot results revealed that the expression of protein hairy enhancer of split-1 was significantly reduced. These results indicate that low expression of protein hairy enhancer of split-1 participates in the differentiation of muscle-derived stem cells into neuron-like cells.
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Affiliation(s)
- Mina Huang
- Department of Nursing College, Liaoning Medical College, Jinzhou 121000, Liaoning Province, China
| | - Zhanpeng Guo
- Department of Orthopedics, First Affiliated Hospital of Liaoning Medical College, Jinzhou 121000, Liaoning Province, China
| | - Kun Liu
- Department of Nursing College, Liaoning Medical College, Jinzhou 121000, Liaoning Province, China
| | - Xifan Mei
- Department of Orthopedics, First Affiliated Hospital of Liaoning Medical College, Jinzhou 121000, Liaoning Province, China
| | - Shiqiang Fang
- Department of Orthopedics, First Affiliated Hospital of Liaoning Medical College, Jinzhou 121000, Liaoning Province, China
| | - Jinhao Zeng
- Department of Orthopedics, First Affiliated Hospital of Liaoning Medical College, Jinzhou 121000, Liaoning Province, China
| | - Yansong Wang
- Department of Orthopedics, First Affiliated Hospital of Liaoning Medical College, Jinzhou 121000, Liaoning Province, China
| | - Yajiang Yuan
- Department of Orthopedics, First Affiliated Hospital of Liaoning Medical College, Jinzhou 121000, Liaoning Province, China
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Lee JY, Piao S, Kim IG, Byun SS, Hwang JH, Hong SH, Kim SW, Hwang TK, Lee JY. Effect of human muscle-derived stem cells on cryoinjured mouse bladder contractility. Urology 2012; 80:224.e7-11. [PMID: 22748891 DOI: 10.1016/j.urology.2012.03.037] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2011] [Revised: 02/29/2012] [Accepted: 03/29/2012] [Indexed: 01/26/2023]
Abstract
OBJECTIVE To investigate the effect of human muscle-derived stem cells (hMDSCs) on ameliorating impaired detrusor contractility in a cryoinjured bladder murine model. METHODS The hMDSCs were isolated and cultured by modified preplate technique, and only CD34-positive hMDSCs were extracted by Mini-MACS kits. Isolated hMDSCs were prelabeled with PKH26 and injected into the cryoinjured bladder to observe the pattern and characteristics. The nude mice were subdivided into three groups: normal group (N), cryoinjury bladder group with saline injection (C), and hMDSCs injection group after cryoinjury (M). At 2 weeks after injecting hMDSCs, we compared the contractility of bladder muscle strip stimulated by electrical field stimulation (EFS), acetylcholine (Ach.), and adenosine triphosphate (ATP), and the bladder smooth muscle tissue was examined by immunohistochemistry. RESULTS The contractile powers of bladder muscle strip in the C group were more decreased than the N group after EFS, Ach, and ATP treatment (P < .05). The bladder contractility of the M group was more increased than in the C group (P < .05), but was lower than the N group after EFS and Ach treatment. However, there was no significant difference of contractile power between the C and M groups after ATP stimulation. In immunohistochemical staining, the thickness of the bladder smooth muscle layer in the M group was significantly increased compared with the C group, and PKH26-labeled implanted cells were positive for smooth muscle cell differentiation marker (α-SMA) in the injected region. CONCLUSION hMDSCs injection increased cholinergic bladder contractile power but not the purinergic component of bladder contraction after cryoinjury.
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Affiliation(s)
- Ji Young Lee
- Department of Urology, College of Medicine, Catholic University of Korea, Seoul, Korea
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Redshaw Z, Loughna PT. Oxygen concentration modulates the differentiation of muscle stem cells toward myogenic and adipogenic fates. Differentiation 2012; 84:193-202. [PMID: 22790207 DOI: 10.1016/j.diff.2012.06.001] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Revised: 03/23/2012] [Accepted: 06/05/2012] [Indexed: 01/08/2023]
Abstract
The physiological oxygen concentration of many tissues is far lower than that in which cells are typically cultured in vitro and this may inadvertently influence the proliferation and differentiation potential of many cell types. Muscle derived stem cells, known as satellite cells are responsible for the maintenance and repair of muscle tissue post-natally and in vivo would be exposed to oxygen concentrations of ∼2-5%. Relatively few studies describe the function of these cells in large animal models and here we investigate the influence oxygen concentration has on modulating porcine muscle derived stem cell fate. We compared cells derived from two metabolically distinct muscles, the diaphragm and the hind limb semi-membranosus (SM) muscle. The two sub-populations responded differently to culture at atmospheric (∼20%) and physiological (∼5%) oxygen concentration. While myogenesis was enhanced in both populations at low oxygen, noticeably diaphragm derived cells exhibited greater myotube formation, than those from SM. The trans-differentiation of cells derived from these two sources was similarly affected, with considerable differences seen in adipogenic and neuronal tendencies. In addition to the effect of oxygen on cell phenotype, the expression of key signalling proteins varied between the two sub-populations during early time-points of induced differentiation, suggesting altered regulation of muscle specific stem cells under these conditions. While differences in muscle stem cell potential requires further investigation, the culture of cells in physiological oxygen concentration appears as fundamental to recreating the micro-environmental niche as routinely used factors such as cytokines, substrata and matrices.
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Affiliation(s)
- Zoe Redshaw
- The University of Nottingham, School of Veterinary Medicine and Science, Sutton Bonington Campus, Sutton Bonington, Leics LE12 5RD, United Kingdom.
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Jiao F, Wang J, Dong ZL, Wu MJ, Zhao TB, Li DD, Wang X. Human mesenchymal stem cells derived from limb bud can differentiate into all three embryonic germ layers lineages. Cell Reprogram 2012; 14:324-33. [PMID: 22775353 DOI: 10.1089/cell.2012.0004] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Mesenchymal stem cells (MSCs) have been isolated from many sources, including adults and fetuses. Previous studies have demonstrated that, compared with their adult counterpart, fetal MSCs with several remarkable advantages may be a better resource for clinical applications. In this study, we successfully isolated a rapidly proliferating cell population from limb bud of aborted fetus and termed them "human limb bud-derived mesenchymal stem cells" (hLB-MSCs). Characteristics of their morphology, phenotype, cell cycle, and differentiation properties were analyzed. These adherent cell populations have a typically spindle-shaped morphology. Flow cytometry analysis showed that hLB-MSCs are positive for CD13, CD29, CD90, CD105, and CD106, but negative for CD3, CD4, CD5, CD11b, CD14, CD15, CD34, CD45, CD45RA, and HLA-DR. The detection of cell cycle from different passages indicated that hLB-MSCs have a similar potential for propagation during long culture in vitro. The most novel finding here is that, in addition to their mesodermal differentiation (osteoblasts and adipocytes), hLB-MSCs can also differentiated into extramesenchymal lineages, such as neural (ectoderm) and hepatic (endoderm) progenies. These results indicate that hLB-MSCs have a high level of plasticity and can differentiate into cell lineages from all three embryonic layers in vitro.
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Affiliation(s)
- Fei Jiao
- Department of Biochemistry and Molecular Biology, Binzhou Medical College, Yantai, Shandong Province, People's Republic of China
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Yang J, Wang X, Wang Y, Guo ZX, Luo DZ, Jia J, Wang XM. Dopaminergic neuronal conversion from adult rat skeletal muscle-derived stem cells in vitro. Neurochem Res 2012; 37:1982-92. [PMID: 22723079 DOI: 10.1007/s11064-012-0819-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2012] [Revised: 05/09/2012] [Accepted: 05/28/2012] [Indexed: 11/26/2022]
Abstract
Muscle-derived stem cells reside in the skeletal muscle tissues and are known for their multipotency to differentiate toward the mesodermal lineage. Recent studies have demonstrated their capacity of neuroectodermal differentiation, including neurons and astrocytes. In this study, we investigated the possibility of dopaminergic neuronal conversion from adult rat skeletal muscle-derived stem cells. Using a neurosphere protocol, muscle-derived stem cells form neurosphere-like cell clusters after cultivation as a suspension, displaying an obvious expression of nestin and a remarkable down-regulation of myogenic associated factors desmin, MyoD, Myf5 and myogenin. Subsequently, these neurosphere-like cell clusters were further directed to dopaminergic differentiation through two major induction steps, patterning to midbrain progenitors with sonic hedgehog and fibroblast growth factor 8, followed by the differentiation to dopaminergic neurons with neurotrophic factors (glial cell line-derived neurotrophic factor) and chemicals (ascorbic acid, forskolin). After the differentiation, these cells expressed tyrosine hydroxylase, dopamine transporter, dopamine D1 receptor and synapse-associated protein synapsin I. Several genes, Nurr1, Lmx1b, and En1, which are critically related with the development of dopaminergic neurons, were also significantly up-regulated. The present results indicate that adult skeletal muscle-derived stem cells could provide a promising cell source for autologous transplantation for neurodegenerative diseases in the future, especially the Parkinson's disease.
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Affiliation(s)
- Jian Yang
- Key Laboratory for Neurodegenerative Disease of Education Ministry, Department of Physiology and Neurobiology, Capital Medical University, 10# Youanmen, Beijing 100069, People's Republic of China
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Kwon EB, Lee JY, Piao S, Kim IG, Ra JC, Lee JY. Comparison of human muscle-derived stem cells and human adipose-derived stem cells in neurogenic trans-differentiation. Korean J Urol 2011; 52:852-7. [PMID: 22216399 PMCID: PMC3246519 DOI: 10.4111/kju.2011.52.12.852] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2011] [Accepted: 10/10/2011] [Indexed: 12/23/2022] Open
Abstract
PURPOSE Erectile dysfunction (ED) remains a major complication from cavernous nerve injury during radical prostatectomy. Recently, stem cell treatment for ED has been widely reported. This study was conducted to investigate the availability, differentiation into functional cells, and potential of human muscle-derived stem cells (hMDSCs) and human adipose-derived stem cells (hADSCs) for ED treatment. MATERIALS AND METHODS We compared the neural differentiation of hMDSCs and hADSCs. Human muscle and adipose tissues were digested with collagenase, followed by filtering and centrifugation. For neural induction, isolated hMDSCs and hADSCs were incubated in neurobasal media containing forskolin, laminin, basic-fibroblast growth factor, and epidermal growth factor for 5 days. Following neural induction, hMDSCs and hADSCs were differentiated into neural cells, including neurons and glia, in vitro. RESULTS In neural differentiated hMDSCs (d-hMDSCs) and differentiated hADSCs (d-hADSCs), neural stem cell marker (nestin) showed a significant decrease by immunocytochemistry, and neuronal marker (β-tubulin III) and glial marker (GFAP) showed a significant increase, compared with primary hMDSCs and hADSCs. Real-time chain reaction analysis and Western blotting demonstrated significantly elevated levels of mRNA and protein of β-tubulin III and GFAP in d-hADSCs compared with d-hMDSCs. CONCLUSIONS We demonstrated that hMDSCs and hADSCs can be induced to undergo phenotypic and molecular changes consistent with neurons. The neural differentiation capacity of hADSCs was better than that of hMDSCs.
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Affiliation(s)
- Eun Bi Kwon
- Department of Urology, College of Medicine, The Catholic University of Korea, Ltd. Seoul, Korea
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Birbrair A, Wang ZM, Messi ML, Enikolopov GN, Delbono O. Nestin-GFP transgene reveals neural precursor cells in adult skeletal muscle. PLoS One 2011; 6:e16816. [PMID: 21304812 PMCID: PMC3033412 DOI: 10.1371/journal.pone.0016816] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2010] [Accepted: 01/11/2011] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Therapy for neural lesions or degenerative diseases relies mainly on finding transplantable active precursor cells. Identifying them in peripheral tissues accessible for biopsy, outside the central nervous system, would circumvent the serious immunological and ethical concerns impeding cell therapy. METHODOLOGY/PRINCIPAL FINDINGS In this study, we isolated neural progenitor cells in cultured adult skeletal muscle from transgenic mice in which nestin regulatory elements control GFP expression. These cells also expressed the early neural marker Tuj1 and light and heavy neurofilament but not S100β, indicating that they express typical neural but not Schwann cell markers. GFP+/Tuj1+ cells were also negative for the endothelial and pericyte markers CD31 and α-smooth muscle actin, respectively. We established their a) functional response to glutamate in patch-clamp recordings; b) interstitial mesenchymal origin; c) replicative capacity; and d) the environment necessary for their survival after fluorescence-activated cell sorting. CONCLUSIONS/SIGNIFICANCE We propose that the decline in nestin-GFP expression in muscle progenitor cells and its persistence in neural precursor cells in muscle cultures provide an invaluable tool for isolating a population of predifferentiated neural cells with therapeutic potential.
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Affiliation(s)
- Alexander Birbrair
- Department of Internal Medicine-Gerontology, Wake Forest University School of Medicine, Winston-Salem, North Carolina, United States of America
- Neuroscience Program, Wake Forest University School of Medicine, Winston-Salem, North Carolina, United States of America
| | - Zhong-Min Wang
- Department of Internal Medicine-Gerontology, Wake Forest University School of Medicine, Winston-Salem, North Carolina, United States of America
| | - Maria Laura Messi
- Department of Internal Medicine-Gerontology, Wake Forest University School of Medicine, Winston-Salem, North Carolina, United States of America
| | - Grigori N. Enikolopov
- Cold Spring Harbor Laboratory, Cold Spring Harbor, New York, United States of America
| | - Osvaldo Delbono
- Department of Internal Medicine-Gerontology, Wake Forest University School of Medicine, Winston-Salem, North Carolina, United States of America
- Neuroscience Program, Wake Forest University School of Medicine, Winston-Salem, North Carolina, United States of America
- * E-mail:
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Redshaw Z, McOrist S, Loughna P. Muscle origin of porcine satellite cells affects in vitro differentiation potential. Cell Biochem Funct 2010; 28:403-11. [PMID: 20589736 DOI: 10.1002/cbf.1670] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Post-natal muscle regeneration relies on the activation of tissue stem cells known as satellite cells, to repair damage following exercise trauma and disease. Satellite cells from individual muscles are known to be heterogeneous with regard to proliferation, fusion and transplantation abilities, although the muscle origin has rarely been considered pertinent to their differentiation capabilities. In this study we compared the potential of two functionally distinct skeletal muscle satellite cell populations from porcine diaphragm and hind-limb semi-membranosus muscles. These two muscles were chosen primarily for differences in metabolic and contractile properties: the diaphragm is more continuously active and has a greater oxidative capacity. Cells were induced to differentiate towards myogenic and adipogenic lineages, and here we have shown that cells from diaphragm exhibit a significantly greater degree of myogenesis compared with those from semi-membranosus, while the converse was true for adipogenesis. Unexpectedly, both conditions generated small numbers of cells with neuronal characteristics for both muscle types, although more so in cells derived from the diaphragm. With increased interest in muscle adiposity with age and disease, these findings suggest that muscle origin of satellite cells does affect lineage fate, however whether differences in developmental origin or metabolic activity of the parent tissue govern this, remains to be determined.
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Affiliation(s)
- Zoe Redshaw
- School of Veterinary Medicine and Science, The University of Nottingham, Sutton Bonington, Leicestershire, UK.
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18
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Wu X, Wang S, Chen B, An X. Muscle-derived stem cells: isolation, characterization, differentiation, and application in cell and gene therapy. Cell Tissue Res 2010; 340:549-67. [DOI: 10.1007/s00441-010-0978-4] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2009] [Accepted: 04/06/2010] [Indexed: 01/06/2023]
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19
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Sarig R, Fuchs O, Tencer L, Panski A, Nudel U, Yaffe D. Cloned myogenic cells can transdifferentiate in vivo into neuron-like cells. PLoS One 2010; 5:e8814. [PMID: 20098686 PMCID: PMC2809103 DOI: 10.1371/journal.pone.0008814] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2009] [Accepted: 12/16/2009] [Indexed: 12/14/2022] Open
Abstract
Background The question of whether intact somatic cells committed to a specific differentiation fate, can be reprogrammed in vivo by exposing them to a different host microenvironment is a matter of controversy. Many reports on transdifferentiation could be explained by fusion with host cells or reflect intrinsic heterogeneity of the donor cell population. Methodology/Principal Findings We have tested the capacity of cloned populations of mouse and human muscle progenitor cells, committed to the myogenic pathway, to transdifferentiate to neurons, following their inoculation into the developing brain of newborn mice. Both cell types migrated into various brain regions, and a fraction of them gained a neuronal morphology and expressed neuronal or glial markers. Likewise, inoculated cloned human myogenic cells expressed a human specific neurofilament protein. Brain injected donor cells that expressed a YFP transgene controlled by a neuronal specific promoter, were isolated by FACS. The isolated cells had a wild-type diploid DNA content. Conclusions These and other results indicate a genuine transdifferentiation phenomenon induced by the host brain microenvironment and not by fusion with host cells. The results may potentially be relevant to the prospect of autologous cell therapy approach for CNS diseases.
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Affiliation(s)
- Rachel Sarig
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel
| | - Ora Fuchs
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel
| | - Lilach Tencer
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel
| | - Avi Panski
- Department of Orthopedics, Kaplan Hospital, Rehovot, Israel
| | - Uri Nudel
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel
| | - David Yaffe
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel
- * E-mail:
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20
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Tropepe V, Alton K, Sachewsky N, Cheng V, Kuo C, Morshead CM. Neurogenic Potential of Isolated Precursor Cells from Early Post-Gastrula Somitic Tissue. Stem Cells Dev 2009; 18:1533-42. [DOI: 10.1089/scd.2008.0359] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Vincent Tropepe
- Department of Cell and Systems Biology, Centre for the Analysis of Genome Evolution and Function, University of Toronto, Toronto, Canada
| | - Kaylee Alton
- Division of Anatomy, Department of Surgery, Terrence Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Canada
| | - Nadia Sachewsky
- Division of Anatomy, Department of Surgery, Terrence Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Canada
| | - Vincent Cheng
- Division of Anatomy, Department of Surgery, Terrence Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Canada
| | - Claire Kuo
- Department of Cell and Systems Biology, Centre for the Analysis of Genome Evolution and Function, University of Toronto, Toronto, Canada
| | - Cindi M. Morshead
- Division of Anatomy, Department of Surgery, Terrence Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Canada
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Transplanted myogenic progenitor cells express neuronal markers in the CNS and ameliorate disease in Experimental Autoimmune Encephalomyelitis. J Neuroimmunol 2009; 215:73-83. [DOI: 10.1016/j.jneuroim.2009.08.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2009] [Revised: 08/23/2009] [Accepted: 08/24/2009] [Indexed: 12/27/2022]
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22
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Andriamanalijaona R, Duval E, Raoudi M, Lecourt S, Vilquin JT, Marolleau JP, Pujol JP, Galera P, Boumediene K. Differentiation potential of human muscle-derived cells towards chondrogenic phenotype in alginate beads culture. Osteoarthritis Cartilage 2008; 16:1509-18. [PMID: 18554936 DOI: 10.1016/j.joca.2008.04.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2008] [Accepted: 04/19/2008] [Indexed: 02/02/2023]
Abstract
OBJECTIVE The aim of this study was to evaluate the differentiation potential of two populations of muscle-derived cells (CD56- and CD56+) towards chondrogenic phenotype in alginate beads culture and to compare the effect of transforming growth factor beta 1 (TGFbeta1) on the differentiation process in these populations. METHODS Muscle CD56- and CD56+ cells were cultured in alginate beads, in a chondrogenic medium, containing or not TGFbeta1 (10 ng/ml). Cultures were maintained for 3, 7, 14 or 21 days in a humidified culture incubator. At harvest, one culture of each set was fixed for alcian blue staining and aggrecan detection. The steady-state level of matrix macromolecules mRNA was assessed by real-time polymerase chain reaction (PCR). Protein detection was performed by western-blot analysis. The binding activity of nuclear extracts to Cbfa1 DNA sequence was also evaluated by electrophoretic mobility shift assays (EMSA). RESULTS Chondrogenic differentiation of both CD56+ and CD56- muscle-derived cells was improved in alginate scaffold, even without growth factor, as suggested by increased chondrogenesis markers expression during the culture. Furthermore, TGFbeta1 enhanced the differentiation process and allowed to maintain a high expression of markers of mature chondrocytes. Of importance, the combination of alginate and TGFbeta1 treatment resulted in a further down-regulation of collagen type I and type X, as well as Cbfa1 both expression and binding activity. CONCLUSIONS Thus, alginate scaffold and chondrogenic medium are sufficient to lead both populations CD56+ and CD56- towards chondrogenic differentiation. Moreover, TGFbeta1 enhances this process and allows to maintain the chondrogenic phenotype by inhibiting terminal differentiation, particularly for CD56- cells.
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Affiliation(s)
- R Andriamanalijaona
- Laboratory of Extracellular Matrix and Pathology, EA 3214, IFR 146 ICORE, University of Caen Basse-Normandie, Caen Cedex, France
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23
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Arsic N, Mamaeva D, Lamb NJ, Fernandez A. Muscle-derived stem cells isolated as non-adherent population give rise to cardiac, skeletal muscle and neural lineages. Exp Cell Res 2008; 314:1266-80. [DOI: 10.1016/j.yexcr.2008.01.009] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2007] [Revised: 01/02/2008] [Accepted: 01/06/2008] [Indexed: 10/22/2022]
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Li HY, Zhou XF. Potential conversion of adult clavicle-derived chondrocytes into neural lineage cells in vitro. J Cell Physiol 2008; 214:630-44. [PMID: 17786944 DOI: 10.1002/jcp.21251] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Neural stem cells (NSC) can be isolated from a variety of adult tissues and become a valuable cell source for the repair of peripheral and central nervous diseases. However, their origin and identity remain controversial because of possible de-differentiation/trans-differentiation or contaminations by hematopoietic stem cells (HSCs) or mesenchymal stem cells (MSCs). We hypothesize that the commonly used NSC culture medium can induce committed cartilage chondrocytes to de-differentiate and/or trans-differentiate into neural cell lineages. Using a biological isolation and purification method with explants culture, we here show that adult rat clavicle cartilage chondrocytes migrate out from tissue blocks, form sphere-like structures, possess the capability of self-renewal, express nestin and p75NTR, markers for neural crest progenitors, and differentiate into neurons, glia, and smooth muscle cells. Comparing with adult cartilage, the spherical-forming neural crest cell-like cells downregulate the chondrocytic marker genes, including collagen II, collagen X, and sox9, as well as neural-lineage repressors/silencers REST and coREST, but upregulate a set of well-defined genes related to neural crest cells and pro-neural potential. Nerve growth factor (NGF) and glial growth factor (GGF) increase glial and neuronal differentiation, respectively. These results suggest that chondrocytes derived from adult clavicle cartilage can become neural crest stem-like cells and acquire neuronal phenotypes in vitro. The possible de-differentiation/trans-differentiation mechanisms underlying the conversion were discussed.
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Affiliation(s)
- Hong-Yun Li
- Department of Human Physiology, School of Medicine, Flinders University of South Australia, Adelaide, South Australia, Australia
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Abstract
Craniofacial skeletal muscles (CskM), including the masticatory (MM), extraocular (EOM) and laryngeal muscles (LM), have a number of properties that set them apart from the majority of skeletal muscles (SkM). They have embryological origins that are distinct from musculature elsewhere in the body, they express a number of immature myosin heavy chain isoforms and maintain increased and distinct expression of a number of myogenic growth factors and their receptors from other adult SkMs. Furthermore, it has recently been demonstrated that unlike limb SkM, normal adult EOM and LM retain a population of activated satellite cells, the regenerative cell in adult SkM. In order to maintain this proliferative pool throughout life, CSkM may contain more satellite cells and/or more multipotent precursor cells that may be more resistant to apoptosis than those found in limb muscle. A further exciting question is whether this potentially more active muscle precursor cell population could be utilized not only for SkM repair, but be harnessed for repair or reconstruction of other tissues, such as nervous tissue or bone. This is a highly attractive speculation as the innate regenerative capacity of craniofacial muscles would ensure the donor tissue would not have compromised future function.
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Affiliation(s)
- L K McLoon
- Department of Ophthalmology, University of Minnesota, Minneapolis, MN, USA
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26
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Sergent-Tanguy S, Véziers J, Bonnamain V, Boudin H, Neveu I, Naveilhan P. Cell surface antigens on rat neural progenitors and characterization of the CD3 (+)/CD3 (-) cell populations. Differentiation 2007; 74:530-41. [PMID: 17177850 DOI: 10.1111/j.1432-0436.2006.00098.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
While the hematopoietic lineage has been extensively studied using cluster of differentiation (CD) antibodies, very few data are available on the extracellular epitopes expressed by rat neural progenitors (rNPC) and their derivatives. In the present study, we used flow cytometry to screen 47 cell surface antigens, initially known as immune markers. The quantitative analyses were performed on rat neurospheres and compared with primary cultures of astroglial cells or cerebellar neurons. Several antigens such as CD80 or CD86 were clearly undetectable while others, like CD26 or CD161, showed a weak expression. Interestingly, 10% and 15% of the cells were immunopositive for CD172a and CD200, two immunoglobulin superfamily members preferentially expressed by glial or neuronal cells, respectively. Over 40% of the cells were immunopositive for CD3, CD71, or MHCI. The biological significance of the latter markers in rNPC remains to be determined but analyses of the CD3(-)/CD3(+) populations isolated by magnetic cell separation revealed differences in their cell fate. Indeed, CD3(+) cells did not establish neurospheres and differentiated mostly into GFAP(+) cells while CD3(-) cells were able to generate neurospheres upon mitogen treatment and gave rise to GFAP(+), A2B5(+), Tuj-1(+), and RIP(+) cells under differentiating conditions. In contrast, CD71(-)/CD71(+) cells did not show any significant difference in their proliferating and differentiating potentials. Finally, it is worth noting that an subpopulation of cells in rat neurospheres exhibit an immunoreactivity against anti-CD25 (IL2 receptor) and anti-CD62L (L-selectin) antibodies. The results reveal particular surface antigen profiles, giving new perspectives on the properties of rat brain-derived cells.
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Nomura T, Ashihara E, Tateishi K, Asada S, Ueyama T, Takahashi T, Matsubara H, Oh H. Skeletal myosphere-derived progenitor cell transplantation promotes neovascularization in delta-sarcoglycan knockdown cardiomyopathy. Biochem Biophys Res Commun 2006; 352:668-74. [PMID: 17150187 DOI: 10.1016/j.bbrc.2006.11.097] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2006] [Accepted: 11/14/2006] [Indexed: 12/15/2022]
Abstract
Bone marrow cells have been shown to contribute to neovascularization in ischemic hearts, whereas their impaired maturation to restore the delta-sarcoglycan (delta-SG) expression responsible for focal myocardial degeneration limits their utility to treat the pathogenesis of cardiomyopathy. Here, we report the isolation of multipotent progenitor cells from adult skeletal muscle, based on their ability to generate floating-myospheres. Myosphere-derived progenitor cells (MDPCs) are distinguishable from myogenic C2C12 cells and differentiate into vascular smooth muscle cells and mesenchymal progeny. The mutation in the delta-SG has been shown to develop vascular spasm to affect sarcolemma structure causing cardiomyopathy. We originally generated delta-SD knockdown (KD) mice and transplanted MDPCs into the hearts. MDPCs enhanced neoangiogenesis and restored delta-SG expression in impaired vasculatures through trans-differentiation, leading to improvement of cardiac function associated with paracrine effectors secretion. We propose that MDPCs may be the promising progenitor cells in skeletal muscle to treat delta-sarcoglycan complex mutant cardiomyopathy.
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Affiliation(s)
- Tetsuya Nomura
- Department of Experimental Therapeutics, Translational Research Center, Kyoto University Hospital, Kyoto 606-8507, Japan
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Abstract
Skeletal muscle is one of the few adult tissues that possesses the capacity for regeneration (restoration of lost functional tissue) as opposed to repair. This capacity is due to the presence of 'muscle stem cells' known as satellite cells. Detailed investigation of these cells over the past 50 years has revealed that both these and other cells within the skeletal muscle complex are capable of regenerating both muscle and other cell types as well. Here, we review this information, and suggest that skeletal muscle is an exciting reservoir of cells for regenerating skeletal muscle itself, as well as other cell types.
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Affiliation(s)
- Andrea C M Sinanan
- Division of Biomaterials and Tissue Engineering, Eastman Dental Institute, University College London, 256 Gray's Inn Road, London WC1X 8LD, UK
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29
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Snykers S, Vanhaecke T, Papeleu P, Luttun A, Jiang Y, Vander Heyden Y, Verfaillie C, Rogiers V. Sequential exposure to cytokines reflecting embryogenesis: the key for in vitro differentiation of adult bone marrow stem cells into functional hepatocyte-like cells. Toxicol Sci 2006; 94:330-41; discussion 235-9. [PMID: 16840566 DOI: 10.1093/toxsci/kfl058] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Differentiation of adult bone marrow stem cells (BMSC) into hepatocyte-like cells is commonly performed by continuous exposure to a cytokines-cocktail. Here, it is shown that the differentiation efficacy in vitro can be considerably enhanced by sequential addition of liver-specific factors (fibroblast growth factor-4, hepatocyte growth factor, insulin-transferrin-sodium selenite, and dexamethasone) in a time-dependent order that closely resembles the secretion pattern during in vivo liver embryogenesis. Quantitative RT-PCR analysis and immunocytochemistry showed that, upon sequential exposure to liver-specific factors, different stages of hepatocyte differentiation, as seen during liver embryogenesis, can be mimicked. Indeed, expression of the early hepatocyte markers alpha-fetoprotein and hepatocyte nuclear factor (HNF)3beta decreased as differentiation progressed, whereas levels of the late liver-specific markers albumin (ALB), cytokeratin (CK)18, and HNF1alpha were gradually upregulated. In contrast, cocktail treatment did not significantly alter the expression pattern of the hepatic markers. Moreover, sequentially exposed cells featured highly differentiated hepatic functions, including ALB secretion, glycogen storage, urea production, and inducible cytochrome P450-dependent activity, far more efficiently compared to the cocktail condition. In conclusion, sequential induction of the differentiation process, analogous to in vivo liver development, is crucial for in vitro differentiation of adult rat BMSC into functional hepatocyte-like cells. This model may not only be applicable for in vitro studies of endoderm differentiation but it also provides a "virtually unlimited" source of functional hepatocytes, suitable for preclinical pharmacological research and testing, and cell and organ development.
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Affiliation(s)
- Sarah Snykers
- Department of Toxicology, Vrije Universiteit Brussel, B-1090 Brussels, Belgium.
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Gonzalez P, Epstein DL, Luna C, Liton PB. Characterization of free-floating spheres from human trabecular meshwork (HTM) cell culture in vitro. Exp Eye Res 2006; 82:959-67. [PMID: 16310191 PMCID: PMC3143838 DOI: 10.1016/j.exer.2005.10.006] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2005] [Revised: 09/28/2005] [Accepted: 10/06/2005] [Indexed: 11/21/2022]
Abstract
It has been observed in several tissues that direct isolation of cells in serum-free media and on nonadhesive substrates results in the formation of spherical clusters of cells known as free-floating spheres. Such free-floating spheres have been hypothesized to contain undifferentiated multipotent progenitor cells. Our goal was to isolate and characterize such free-floating spheres from HTM cell primary cultures. For this purpose, HTM cells were incubated in serum-free media and on a nonadhesive substrate. Individual free-floating spheres generated in these conditions were isolated in 96-well plates, and their proliferative capacity was evaluated by monitoring their size increase over time. The expression of the TM markers, MGP and CHI3L1, was examined using recombinant adenoviruses containing the respective promoters. Morphology of the free-floating spheres was analysed in semithin sections, and the gene expression profile was obtained using Human Genome U133 Plus 2.0 Affymetrix microarrays. HTM cells incubated in serum-free media and on nonadhesive substrate generated free-floating spheres that could be grown for more than 3 months. Addition of serum to the culture media promoted the attachment of the spheres to the substrate, migration of cells from the spheres, and differentiation into cells phenotypically similar to normal TM cells. Gene profiling analysis demonstrated strong similarities between the gene expression profiles of the spheres and HTM cell monolayers. Both infection with the recombinant adenoviruses and gene array analysis demonstrated the expression of CHI3L1 and MGP, indicating that free-floating spheres likely originate from HTM cells. Gene array analysis also showed expression of the marker for neural precursor cells nestin, as well as leukemia inhibitory factor, a gene involved in the maintenance of the undifferentiated state of progenitor cells. Analysis of semithin sections indicated that these TM free-floating spheres were highly dynamic structures demonstrating a distinct radial gradient of cell proliferation, survival, and apoptosis. Extensive up- and down-regulation of gene expression was associated with the processes of sphere attachment and cell migration after the addition of serum. These results suggest that HTM primary cultures might contain relatively undifferentiated or progenitor cells. The availability of TM progenitor cell cultures could constitute a useful tool to investigate cell therapy approaches targeting the TM in glaucoma.
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Affiliation(s)
- P Gonzalez
- Department of Ophthalmology, Duke University, Erwin Road, Box 3802, Durham NC 27710, USA.
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31
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Nakamura Y, Muguruma Y, Yahata T, Miyatake H, Sakai D, Mochida J, Hotta T, Ando K. Expression of CD90 on keratinocyte stem/progenitor cells. Br J Dermatol 2006; 154:1062-70. [PMID: 16704635 DOI: 10.1111/j.1365-2133.2006.07209.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND The identification and purification of keratinocyte stem cells (KSCs) that are capable of self-renewal and maintenance of differentiating cell populations could contribute both to our understanding of the biology of these cells, and to significant clinical applications, such as the culturing of keratinocytes for transplantation to severe burn wounds. Here, we report the detection of CD90(+) cells in cultured normal human epidermal keratinocytes and adult skin. OBJECTIVES To investigate the biological function of CD90(+) and CD90(-) keratinocytes. METHODS CD90(+) and CD90(-) keratinocytes were purified from adult skin and cultured keratinocytes using fluorescent activated cell sorting, and their biological abilities were analysed using both in vitro and in vivo assays. RESULTS Flow cytometry (FCM) analysis identified approximately 18% of post-primary neonatal keratinocytes as CD90(+). However, during expansion of the culture, the expression level of CD90 rapidly decreased to about 2.5% at passage 10, while most of the keratinocytes maintained expression of alpha6 integrin. Purified CD90(+) keratinocytes demonstrated a sixfold higher cell growth rate than CD90(-) cells and the ability to form large (over 3 mm in diameter) colonies. We then quantitatively evaluated both populations using a previously described in vivo human epidermal cyst formation assay. Enhanced green fluorescent protein (EGFP)-labelled CD90(+) or CD90(-) keratinocytes were subcutaneously injected into nonobese diabetic/severe combined immunodeficient (NOD/SCID) mice. Six weeks after transplantation, EGFP(+) cell clusters in human epidermal cysts were evaluated using image analysis software. EGFP(+) cell cluster areas in the basal layer, derived from EGFP(+) CD90(+) cells, were eightfold larger than clusters of EGFP(+) CD90(-) cells. Furthermore, immunohistochemical staining and FCM analysis indicated that CD90 was expressed in most of the basal layer of the normal human epidermis. CONCLUSIONS These results indicated that CD90 is a useful marker for the detection of human KSC-enriched populations in cultured human keratinocytes.
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Affiliation(s)
- Y Nakamura
- Division of Hematopoiesis, Research Center for Regenerative Medicine, Tokai University School of Medicine, Isehara, Kanagawa 259-1193, Japan.
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Rieske P, Krynska B, Azizi SA. Human fibroblast-derived cell lines have characteristics of embryonic stem cells and cells of neuro-ectodermal origin. Differentiation 2005; 73:474-83. [PMID: 16351691 DOI: 10.1111/j.1432-0436.2005.00050.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Fibroblasts are the most ubiquitous cells in complex organisms. They are the main cells of stromal tissue and play an important role in repair and healing of damaged organs. Here we report new data-initially serendipitous findings-that fibroblast-derived cell line (human fetal lung derived cells, MRC-5) have the morphology, growth rate and gene expression pattern characteristic of embryonic stem cells and cells of neuro-ectodermal origin. We have developed a serum-free culture system to maintain these cells in proliferative state. We discovered that, at proliferative state, these cells express transcription factors of pluripotent cells, OCT-3/4 and REX-1, and embryonic cell surface antigens SSEA-1, SSEA-3, and SSEA-4, as well as TRA-1-60 and TRA-1-81. In addition to embryonic cell markers, the fibroblasts expressed neuroectodermal genes: Musashi-1, nestin, medium neurofilament, and beta-III tubulin. RT-PCR data revealed that mesencephalic transcription factors, Nurr-1 and PTX-3, were also expressed in MRC-5 cells, and that these cells could be induced to express tyrosine hydroxylase (TH). Expression of TH followed down-regulation of genes associated with cell proliferation, OCT-3/4, REX-1, and beta-catenin. These data indicate that the cells commonly known as fibroblasts have some of the characteristics of stem cells, and can be induced to become neuroectodermal cells and perhaps even mature neurons.
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Affiliation(s)
- Piotr Rieske
- Department of Neurology, Temple University School of Medicine, 3401 N Broad St. 558 Parkinson Pavilion, Philadelphia, PA 19140, USA
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Funderburgh ML, Du Y, Mann MM, SundarRaj N, Funderburgh JL. PAX6 expression identifies progenitor cells for corneal keratocytes. FASEB J 2005; 19:1371-3. [PMID: 15901670 PMCID: PMC2876310 DOI: 10.1096/fj.04-2770fje] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Keratocytes of the corneal stroma produce a transparent extracellular matrix required for vision. During wound-healing and in vitro, keratocytes proliferate, becoming fibroblastic, and lose biosynthesis of unique corneal matrix components. This study sought identification of cells in the corneal stroma capable of assuming a keratocyte phenotype after extensive proliferation. About 3% of freshly isolated bovine stromal cells exhibited clonal growth. In low-mitogen media, selected clonal cultures displayed dendritic morphology and expressed high levels of keratan sulfate, aldehyde dehydrogenase 3A1, and keratocan, molecular markers of keratocyte phenotype. In protein-free media, both primary keratocytes and selected clonal cells aggregated to form attachment-independent spheroids expressing elevated levels of those marker molecules. The selected clonal cells exhibited normal karyotype and underwent replicative senescence after 65-70 population doublings; however, they continued expression of keratocyte phenotypic markers throughout their replicative life span. The progenitor cells expressed elevated mRNA for several genes characteristic of stem cells and also for genes expressed during ocular development PAX6, Six2, and Six3. PAX6 protein was detected in the cultured progenitor cells and a small number of stromal cells in intact tissue but was absent in cultured keratocytes and fibroblasts. Cytometry demonstrated PAX6 protein in 4% of freshly isolated stromal cells. These results demonstrate the presence of a previously unrecognized population of PAX6-positive cells in adult corneal stroma that maintain the potential to assume a keratocyte phenotype even after extensive replication. The presence of such progenitor cells has implications for corneal biology and for cell-based therapies targeting corneal scarring.
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Affiliation(s)
- Martha L Funderburgh
- Department of Ophthalmology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
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Vourc'h P, Lacar B, Mignon L, Lucas PA, Young HE, Chesselet MF. Effect of neurturin on multipotent cells isolated from the adult skeletal muscle. Biochem Biophys Res Commun 2005; 332:215-23. [PMID: 15896320 DOI: 10.1016/j.bbrc.2005.04.104] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2005] [Revised: 02/25/2005] [Indexed: 12/21/2022]
Abstract
Ligands of the glial cell line-derived neurotrophic factors (GDNF)-family are trophic factors for the development and survival of multiple cell types, however their effects on non-neuronal stem cells are unknown. We examined the action of neurturin on a candidate stem cell population isolated from adult skeletal muscles. When grown as spheres, these cells expressed mRNAs for GDNF, persephin, GFR-alpha2, GFR-alpha4 (neurturin receptor), and Ret. Exposure of these cells to neurturin significantly augmented cell numbers via increased cell proliferation. After addition of retinoic acid, the cells exited the cell cycle, developed thin processes, and became immunoreactive for betaIII-tubulin, while Ret mRNA expression decreased, without changes in the level of GFR-alpha2 mRNA. Neurturin induced an outgrowth of processes on these betaIII-tubulin positive cells. Neurturin may therefore be beneficial in the use of these multipotent cells isolated from adult muscles for autologous transplants in neurological applications.
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Affiliation(s)
- Patrick Vourc'h
- Department of Neurology, Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA , USA
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Young HE, Duplaa C, Katz R, Thompson T, Hawkins KC, Boev AN, Henson NL, Heaton M, Sood R, Ashley D, Stout C, Morgan JH, Uchakin PN, Rimando M, Long GF, Thomas C, Yoon JI, Park JE, Hunt DJ, Walsh NM, Davis JC, Lightner JE, Hutchings AM, Murphy ML, Boswell E, McAbee JA, Gray BM, Piskurich J, Blake L, Collins JA, Moreau C, Hixson D, Bowyer FP, Black AC. Adult-derived stem cells and their potential for use in tissue repair and molecular medicine. J Cell Mol Med 2005; 9:753-69. [PMID: 16202227 PMCID: PMC6741352 DOI: 10.1111/j.1582-4934.2005.tb00510.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
This report reviews three categories of precursor cells present within adults. The first category of precursor cell, the epiblast-like stem cell, has the potential of forming cells from all three embryonic germ layer lineages, e.g., ectoderm, mesoderm, and endoderm. The second category of precursor cell, the germ layer lineage stem cell, consists of three separate cells. Each of the three cells is committed to form cells limited to a specific embryonic germ layer lineage. Thus the second category consists of germ layer lineage ectodermal stem cells, germ layer lineage mesodermal stem cells, and germ layer lineage endodermal stem cells. The third category of precursor cells, progenitor cells, contains a multitude of cells. These cells are committed to form specific cell and tissue types and are the immediate precursors to the differentiated cells and tissues of the adult. The three categories of precursor cells can be readily isolated from adult tissues. They can be distinguished from each other based on their size, growth in cell culture, expressed genes, cell surface markers, and potential for differentiation. This report also discusses new findings. These findings include the karyotypic analysis of germ layer lineage stem cells; the appearance of dopaminergic neurons after implantation of naive adult pluripotent stem cells into a 6-hydroxydopamine-lesioned Parkinson's model; and the use of adult stem cells as transport mechanisms for exogenous genetic material. We conclude by discussing the potential roles of adult-derived precursor cells as building blocks for tissue repair and as delivery vehicles for molecular medicine.
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Affiliation(s)
- Henry E Young
- Division of Basic Medical Sciences, Department of Pediatrics, Mercer University School of Medicine, Macon, GA 31207, USA.
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Mignon L, Vourc'h P, Romero-Ramos M, Osztermann P, Young HE, Lucas PA, Chesselet MF. Transplantation of multipotent cells extracted from adult skeletal muscles into the subventricular zone of adult rats. J Comp Neurol 2005; 491:96-108. [PMID: 16127692 DOI: 10.1002/cne.20685] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Stem cells isolated from adult tissues may be useful for autologous cell therapy in the nervous system. In the present study we tested the ability of multipotent stem cells isolated from adult muscle to survive and respond to migratory and differentiating cues when transplanted into the adult subventricular zone (SVZ). Prior to transplantation the cells were grown as spheres that expressed doublecortin, nestin, and betaIII-tubulin, as well as the mRNAs for the receptor EphA4 and the ligands ephrin B1, ephrin B2, but not ephrin B3. Four weeks after transplantation into the anterior part of the SVZ in adult rats, surviving cells were observed along the ventricular wall, in the SVZ, and in the posterior rostral migratory stream (RMS). None of these cells stained for betaIII-tubulin or doublecortin, which are molecules expressed by migrating neuroblasts, and none were present in the more rostral regions of the RMS or the olfactory bulb. However, most surviving transplanted cells were integrated into the wall of the lateral ventricle and expressed vimentin, a marker also expressed by ependymocytes. No tumors were observed 4 weeks posttransplantation. Our results suggest that multipotent stem cells isolated from adult muscle, which can be easily and safely isolated from patients and rapidly expanded ex vivo, may provide autologous vectors for the local delivery of secreted factors to the ventricles or nearby regions.
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Affiliation(s)
- Laurence Mignon
- Department of Neurology, David Geffen School of Medicine at University of California Los Angeles, Los Angeles, California 90095, USA
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Alessandri G, Pagano S, Bez A, Benetti A, Pozzi S, Iannolo G, Baronio M, Invernici G, Caruso A, Muneretto C, Bisleri G, Parati E. Isolation and culture of human muscle-derived stem cells able to differentiate into myogenic and neurogenic cell lineages. Lancet 2004; 364:1872-83. [PMID: 15555667 DOI: 10.1016/s0140-6736(04)17443-6] [Citation(s) in RCA: 151] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND Skeletal-muscle-derived stem cells seem to be a distinct population of immature progenitors of satellite cells, but their functional properties remain unclear, especially in human adult tissue. We investigated their differentiation in samples of skeletal muscle obtained from adults undergoing cardiovascular surgery. METHODS Samples were obtained from the brachioradialis muscle of 12 patients in whom the radial artery was the conduit for myocardial revascularisation. The stem cells were isolated by a procedure similar to that used for rat gastrocnemius and cultured in medium optimised for growth of neural stem cells. Cytometry was used for phenotypic characterisation and immunocytochemistry and RT-PCR to assess differentiation. Immunohistochemistry was used to examine engraftment of skeletal-muscle-derived stem cells into injured rat spinal cord. FINDINGS The skeletal-muscle stem cells consisted of two distinct types: one with the typical spindle morphology of satellite cells, the other of rounded cells. Some cultures could be maintained for longer than 6 months. The cells were mainly positive for desmin and to a lesser extent CD105, vimentin, and AC133/CD133, but negative for FLK-1/KDR, CD34, CD31, CD45, von Willebrand factor, Ve-cadherins, and BCL2. After in-vitro differentiation, the cells were able to organise skeletal-muscle fibres and stained positively for striated-muscle actin, smooth-muscle actin, and desmin. Moreover, they differentiated into astrocytes and neurons, as confirmed by positive staining for characteristic proteins. INTERPRETATION Adult human skeletal muscle includes a population of progenitor stem cells that can generate cells of the same lineage and cells with neurogenic properties. Muscle may therefore be a tissue source for the isolation of pluripotent stem cells for development of cell-based therapies for human myogenic and neurogenic diseases.
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Affiliation(s)
- Giulio Alessandri
- Laboratory of Neurobiology and Neuroregenerative Therapies, Carlo Besta Neurological Institute, Via Celoria 11, 20131 Milan, Italy.
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