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Flores A, Fernández-Sánchez L, Kutsyr O, Lax P, Yáñez A, Gil ML, Gozalbo D, Maneu V. Non-haematopoietic Sca-1 + Cells in the Retina of Adult Mice Express Functional TLR2. Stem Cell Rev Rep 2024; 20:845-851. [PMID: 38183535 DOI: 10.1007/s12015-023-10674-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/26/2023] [Indexed: 01/08/2024]
Abstract
The mammal retina does not have the capacity to regenerate throughout life, although some stem and progenitor cells persist in the adult retina and might retain multipotentiality, as previously described in many tissues. In this work we demonstrate the presence of a small lineage- Sca-1+ cell population in the adult mouse retina which expresses functional TLR2 receptors as in vitro challenge with the pure TLR2 agonist Pam3CSK4 increases cell number and upregulates TLR2. Therefore, this population could be of interest in neuroregeneration studies to elucidate its role in these processes.
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Affiliation(s)
- Ana Flores
- Departamento de Microbiología y Ecología, Universitat de València, Valencia, Spain
| | | | - Oksana Kutsyr
- Departamento de Óptica, Farmacología y Anatomía, Universidad de Alicante, Alicante, Spain
| | - Pedro Lax
- Departamento de Fisiología, Genética y Microbiología, Universidad de Alicante, Alicante, Spain
| | - Alberto Yáñez
- Departamento de Microbiología y Ecología, Universitat de València, Valencia, Spain
| | - María Luisa Gil
- Departamento de Microbiología y Ecología, Universitat de València, Valencia, Spain
| | - Daniel Gozalbo
- Departamento de Microbiología y Ecología, Universitat de València, Valencia, Spain
| | - Victoria Maneu
- Departamento de Óptica, Farmacología y Anatomía, Universidad de Alicante, Alicante, Spain.
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2
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Kasturi M, Mathur V, Gadre M, Srinivasan V, Vasanthan KS. Three Dimensional Bioprinting for Hepatic Tissue Engineering: From In Vitro Models to Clinical Applications. Tissue Eng Regen Med 2024; 21:21-52. [PMID: 37882981 PMCID: PMC10764711 DOI: 10.1007/s13770-023-00576-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 07/07/2023] [Accepted: 07/11/2023] [Indexed: 10/27/2023] Open
Abstract
Fabrication of functional organs is the holy grail of tissue engineering and the possibilities of repairing a partial or complete liver to treat chronic liver disorders are discussed in this review. Liver is the largest gland in the human body and plays a responsible role in majority of metabolic function and processes. Chronic liver disease is one of the leading causes of death globally and the current treatment strategy of organ transplantation holds its own demerits. Hence there is a need to develop an in vitro liver model that mimics the native microenvironment. The developed model should be a reliable to understand the pathogenesis, screen drugs and assist to repair and replace the damaged liver. The three-dimensional bioprinting is a promising technology that recreates in vivo alike in vitro model for transplantation, which is the goal of tissue engineers. The technology has great potential due to its precise control and its ability to homogeneously distribute cells on all layers in a complex structure. This review gives an overview of liver tissue engineering with a special focus on 3D bioprinting and bioinks for liver disease modelling and drug screening.
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Affiliation(s)
- Meghana Kasturi
- Manipal Centre for Biotherapeutics Research, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Vidhi Mathur
- Manipal Centre for Biotherapeutics Research, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Mrunmayi Gadre
- Manipal Centre for Biotherapeutics Research, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Varadharajan Srinivasan
- Department of Civil Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Kirthanashri S Vasanthan
- Manipal Centre for Biotherapeutics Research, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India.
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Caradonna E, Mormone E, Centritto EM, Mazzanti A, Papini S, Fanelli M, Petrella L, Petruzziello A, Farina MA, Farina E, Amato B, De Filippo CM, Vanoli E. Different methods of bone marrow harvesting influence cell characteristics and purity, affecting clinical outcomes. JVS Vasc Sci 2023; 4:100130. [PMID: 38058747 PMCID: PMC10696233 DOI: 10.1016/j.jvssci.2023.100130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 09/17/2023] [Indexed: 12/08/2023] Open
Abstract
Background Bone marrow (BM)-derived stem cells were implanted to induce angiogenesis in patients with no-option critical limb-threatening ischemia. Considering the potential for this therapy, conflicting results related to BM harvesting methods have been reported that could affect stem cell concentrations and quality. Methods A total of 75 patients with no-option critical limb-threatening ischemia were treated with BM implantation. For 58 patients, BM was harvested using a BM aspirate concentrate system (Harvest Technologies; group HT) with a standard aspiration needle, followed by an automated centrifugation process, to produce BM aspirate concentrate. For 17 patients, BM was harvested using the Marrow Cellution system (Aspire Medical Innovation; group MC). CD34+ cells/mL, CD117+ cells/mL, CD133+ cells/mL, CD309+ cells/mL, hematocrit, and BM purity were compared between the two BM preparations. Results The retrospective analysis of a subset group after adjustment for age shows that the quality of BM obtained using the Marrow Cellution system is better, in terms of purity, than the classic harvesting method before centrifugation. Harvested BM before centrifugation is characterized by a higher percentage of CD133+ cells compared with BM after centrifugation. In contrast, the MC aspirate had a larger amount of very small embryonic-like cells, as indicated by the higher percentage of CD133+, CD34+, and CD45- cells. These differences translated into an increased occurrence of leg amputations in group HT than in group MC and an increase in transcutaneous oxygen pressure in patients treated with BM aspirated using MC. Conclusions BM manipulation, such as centrifugation, affects the quality and number of stem cells, with detrimental consequences on clinical outcomes, as reflected by the different amputation rates between the two groups.
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Affiliation(s)
| | - Elisabetta Mormone
- Institute for Stem-Cell Biology, Regenerative Medicine and Innovative Therapies, Fondazione IRCCS Casa Sollievo della Sofferenza, Foggia, Italy
| | | | - Andrea Mazzanti
- Department of Molecular Medicine, University of Pavia, Pavia, Italy
- Unit of Molecular Cardiology, ICS Maugeri, Pavia, Italy
| | - Stefano Papini
- Clinical and Research Laboratory, Gemelli Molise S.p.A., Campobasso, Italy
| | - Mara Fanelli
- Laboratorio di Diagnostica Molecolare, Gemelli Molise S.p.A., Campobasso, Italy
| | - Lella Petrella
- Laboratorio di Diagnostica Molecolare, Gemelli Molise S.p.A., Campobasso, Italy
| | - Arnolfo Petruzziello
- UOC Patologia Clinica, Dipartimento dei Servizi Sanitari, AORN CASERTA, Caserta, Italy
| | | | | | - Bruno Amato
- Department of Public Health, University of Naples Federico II, Naples, Italy
| | | | - Emilio Vanoli
- Department of Molecular Medicine, University of Pavia, Pavia, Italy
- Cardiology Unit, Sacra Famiglia Hospital, Erba, Italy
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4
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Evidence of Stem Cells Mobilization in the Blood of Patients with Pancreatitis: A Potential Link with Disease Severity. Stem Cells Int 2022; 2022:5395248. [PMID: 35846982 PMCID: PMC9286984 DOI: 10.1155/2022/5395248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Accepted: 06/27/2022] [Indexed: 11/17/2022] Open
Abstract
A growing number of studies indicate the potential involvement of various populations of bone marrow-derived stem cells (BMSCs) in tissue repair. However, the mobilization of BMSCs to the peripheral blood (PB) in acute and chronic pancreatitis (AP and CP) has not been investigated. A total of 78 patients were assigned into AP, CP, and healthy control groups in this study. Using flow cytometry, we found that VSELs, EPCs, and CD133+SCs were mobilized to the PB of patients with both AP and CP. Interestingly, AP and CP patients exhibited lower absolute number of circulating MSCs in the PB compared to healthy individuals. SC mobilization to the PB was more evident in patients with AP than CP and in patients with moderate/severe AP than mild AP. Using ELISA, we found a significantly increased HGF concentration in the PB of patients with AP and SDF1α in the PB of patients with CP. We noted a significant positive correlation between SDF1α concentration and the mobilized population of CD133+SCs in AP and between C5a and the mobilized population of VSELs moderate/severe AP. Thus, bone marrow-derived SCs may play a role in the regeneration of pancreatic tissue in both AP and CP, and mobilization of VSELs to the PB depends on the severity of AP.
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Molecular Insights into Endometrial Cancer in Mice. Stem Cell Rev Rep 2022; 18:1702-1717. [PMID: 35389139 DOI: 10.1007/s12015-022-10367-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/10/2022] [Indexed: 10/18/2022]
Abstract
Pluripotent, very small embryonic-like stem cells (VSELs) and the 'progenitors' endometrial stem cells (EnSCs) along with associated molecular changes in endometrial cancer, that developed seven months after neonatal exposure to estradiol in one of the sixty mice, were studied in the present study. Endocrine disruption affected both endometrium and myometrium, there was accumulation of endometrial fluid and significant hyperplasia. Disrupted endometrial-myometrial junction resulted in mobilization of myometrial cells into endometrium and epithelial and stromal cells into myometrium suggestive of adenomyosis. Markers specific for VSELs/ EnSCs (OCT-4, NANOG, SSEA-1, SCA-1, c-KIT) showed increased expression in uterine sections and marked upregulation of corresponding transcripts (Oct-4A, Oct-4, Sox-2, Nanog, Sca-1, c-Kit) was noted in RNA extracted from both uterine tissue and stem cells enriched from endometrial fluid. Hormonal receptors (ER-α, ER-β, PR, FSHR) were upregulated in both tumor sections and in endometrial fluid. ER-β and FSHR (Fshr3) expression was prominent suggesting a major role in endometrial cancer. Cancer cells showed global hypomethylation (reduced expression of 5-methyl cytosine), reduced expression of tumor suppressor gene (PTEN) and increased expression of cancer stem cells marker (CD166) which suggested dysregulation and aberrant oncogenic events. Increased expression of PCNA, Ki67, SOX-9 suggested excessive proliferation and hyperplasia which are predominant signs of endometrial cancer. Results suggest that VSELs increase in numbers and possibly transform into cancer stem cells (co-express CD166 and OCT-4) in endometrial cancer. Expression of OCT-4, CD133, ALDHA1 and CD166 in side-population cells from human endometrial cancer samples suggests a possible role of VSELs in human endometrial cancer as well.
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Ciechanowicz AK, Sielatycka K, Cymer M, Skoda M, Suszyńska M, Bujko K, Ratajczak MZ, Krause DS, Kucia M. Bone Marrow-Derived VSELs Engraft as Lung Epithelial Progenitor Cells after Bleomycin-Induced Lung Injury. Cells 2021; 10:1570. [PMID: 34206516 PMCID: PMC8303224 DOI: 10.3390/cells10071570] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 06/13/2021] [Accepted: 06/15/2021] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Alveolar type 2 (AT2) cells and bronchioalveolar stem cells (BASC) perform critical regenerative functions in response to lung damage. Published data show that nonhematopoietic, bone marrow-derived "very small embryonic-like stem cells" (VSELs) can differentiate in vivo into surfactant protein C (SPC)-producing AT2 cells in the lung. Here, we test directly whether VSEL-derived BASC and AT2 cells function to produce differentiated progeny. METHODS using a reporter mouse in which the H2B-GFP fusion protein is driven from the murine SPC promoter, we tested whether bone marrow-derived VSELs or non-VSEL/nonhematopoietic stem cells (non-VSEL/non-HSCs) can differentiate into AT2 and BASC cells that function as progenitor cells. Immediately following bleomycin administration, WT recipient mice underwent intravenous administration of VSELs or non-VSEL/non-HSCs from SPC H2B-GFP mice. GFP+ AT2 and BASC were isolated and tested for progenitor activity using in vitro organoid assays. RESULTS after 21 days in vivo, we observed differentiation of VSELs but not non-VSEL/non-HSCs into phenotypic AT2 and BASC consistent with previous data in irradiated recipients. Subsequent in vitro organoid assays revealed that VSEL-derived AT2 and BASC maintained physiological potential for differentiation and self-renewal. CONCLUSION these findings prove that VSELs produce functional BASC and AT2 cells, and this may open new avenues using VSELs to develop effective cell therapy approaches for patients with lung injury.
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Affiliation(s)
- Andrzej K. Ciechanowicz
- Department of Regenerative Medicine, Center for Preclinical Research and Technology, Medical University of Warsaw, 02-097 Warsaw, Poland; (A.K.C.); (M.C.); (M.S.); (M.Z.R.)
| | - Katarzyna Sielatycka
- Institute of Biology, Faculty of Exact and Natural Sciences, University of Szczecin, 71-415 Szczecin, Poland;
| | - Monika Cymer
- Department of Regenerative Medicine, Center for Preclinical Research and Technology, Medical University of Warsaw, 02-097 Warsaw, Poland; (A.K.C.); (M.C.); (M.S.); (M.Z.R.)
| | - Marta Skoda
- Department of Regenerative Medicine, Center for Preclinical Research and Technology, Medical University of Warsaw, 02-097 Warsaw, Poland; (A.K.C.); (M.C.); (M.S.); (M.Z.R.)
| | - Malwina Suszyńska
- Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, Louisville, KY 40202, USA; (M.S.); (K.B.)
| | - Kamila Bujko
- Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, Louisville, KY 40202, USA; (M.S.); (K.B.)
| | - Mariusz Z. Ratajczak
- Department of Regenerative Medicine, Center for Preclinical Research and Technology, Medical University of Warsaw, 02-097 Warsaw, Poland; (A.K.C.); (M.C.); (M.S.); (M.Z.R.)
- Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, Louisville, KY 40202, USA; (M.S.); (K.B.)
| | - Diane S. Krause
- Departments of Laboratory Medicine, Cell Biology and Pathology and the Yale Stem Cell Center, Yale University School of Medicine, New Haven, CT 06509, USA;
| | - Magdalena Kucia
- Department of Regenerative Medicine, Center for Preclinical Research and Technology, Medical University of Warsaw, 02-097 Warsaw, Poland; (A.K.C.); (M.C.); (M.S.); (M.Z.R.)
- Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, Louisville, KY 40202, USA; (M.S.); (K.B.)
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7
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Pluripotent Stem (VSELs) and Progenitor (EnSCs) Cells Exist in Adult Mouse Uterus and Show Cyclic Changes Across Estrus Cycle. Reprod Sci 2020; 28:278-290. [PMID: 32710237 DOI: 10.1007/s43032-020-00250-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 06/11/2020] [Accepted: 06/30/2020] [Indexed: 12/19/2022]
Abstract
We have earlier reported pluripotent, very small embryonic-like stem cells (VSELs) and slightly bigger endometrial stem cells (EnSCs) in adult mouse uterus and their regulation by gonadotropin and steroid hormones. VSELs can differentiate into cells of all three lineages in vitro; however, they neither expand readily in vitro nor compliment a developing embryo. In the present study, a robust protocol is described to enrich uterine stem/progenitor cells along with their characterization and variation across estrus cycle. After enzymatic digestion of adult mouse uterus, single-cell suspension obtained was spun at 1000 rpm (250 g) to pellet majority of cells. Stem cells remain buoyant at this speed and were pelleted by spinning supernatant at 3000 rpm (1000 g). Spherical, darkly stained VSELs (2-6 μm) with high nucleo-cytoplasmic ratio and EnSCs (> 6 μm) expressed OCT-4, NANOG, SSEA-1, SCA-1, and c-KIT. OCT-4-positive cells co-expressed SSEA-1, ERα, ERβ, PR, and FSHR. Transcripts specific for pluripotent state (Oct-4, Oct-4a, Sox-2, Nanog), primordial germ cells (Stella, Fragilis), and receptors for pituitary and steroid hormones (ERα, ERβ, PR, FSHR 1 and 3) were studied by RT-PCR in 3000 rpm pellet. Cell pellet collected at 3000 rpm showed 10-fold enrichment of VSELs (2-6 μm, viable cells with surface phenotype of LIN-CD45-SCA-1+) by flow cytometry and upregulation of pluripotent transcripts by qRT-PCR compared with 1000 rpm pellet. VSELs were maximal during estrus and metestrus phases of estrus cycle. To conclude, VSELs/EnSCs can be enriched from adult uterus using the strategy described here, vary in numbers across estrus cycle, and are vulnerable to endocrine disruption as they express steroid receptors.
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8
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Arjmand B, Sarvari M, Alavi-Moghadam S, Payab M, Goodarzi P, Gilany K, Mehrdad N, Larijani B. Prospect of Stem Cell Therapy and Regenerative Medicine in Osteoporosis. Front Endocrinol (Lausanne) 2020; 11:430. [PMID: 32719657 PMCID: PMC7347755 DOI: 10.3389/fendo.2020.00430] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 06/01/2020] [Indexed: 12/13/2022] Open
Abstract
The field of cell therapy and regenerative medicine can hold the promise of restoring normal tissues structure and function. Additionally, the main targets of stem cell-based therapies are chronic diseases and lifelong disabilities without definite cures such as osteoporosis. Osteoporosis as one of the important causes of morbidity in older men and post-menopausal women is characterized by reduced bone quantity or skeletal tissue atrophy that leads to an increased risk of osteoporotic fractures. The common therapeutic methods for osteoporosis only can prevent the loss of bone mass and recover the bone partially. Nevertheless, stem cell-based therapy is considered as a new approach to regenerate the bone tissue. Herein, mesenchymal stem cells as pivotal candidates for regenerative medicine purposes especially bone regeneration are the most common type of cells with anti-inflammatory, immune-privileged potential, and less ethical concerns than other types of stem cells which are investigated in osteoporosis. Based on several findings, the mesenchymal stem cells effectiveness near to a great extent depends on their secretory function. Indeed, they can be involved in the establishment of normal bone remodeling via initiation of specific molecular signaling pathways. Accordingly, the aim herein was to review the effects of stem cell-based therapies in osteoporosis.
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Affiliation(s)
- Babak Arjmand
- Cell Therapy and Regenerative Medicine Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
- Metabolomics and Genomics Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Masoumeh Sarvari
- Metabolomics and Genomics Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Sepideh Alavi-Moghadam
- Cell Therapy and Regenerative Medicine Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Moloud Payab
- Obesity and Eating Habits Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Parisa Goodarzi
- Brain and Spinal Cord Injury Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Kambiz Gilany
- Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
- Integrative Oncology Department, Breast Cancer Research Center, Motamed Cancer Institute, Academic Center for Education, Culture and Research (ACER), Tehran, Iran
- Reproductive Immunology Research Center, Avicenna Research Institute, Academic Center for Education, Culture and Research (ACER), Tehran, Iran
| | - Neda Mehrdad
- Elderly Health Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Bagher Larijani
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
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Rai N, Singh AK, Singh SK, Gaurishankar B, Kamble SC, Mishra P, Kotiya D, Barik S, Atri N, Gautam V. Recent technological advancements in stem cell research for targeted therapeutics. Drug Deliv Transl Res 2020; 10:1147-1169. [DOI: 10.1007/s13346-020-00766-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Rožman P. How Could We Slow or Reverse the Human Aging Process and Extend the Healthy Life Span with Heterochronous Autologous Hematopoietic Stem Cell Transplantation. Rejuvenation Res 2019; 23:159-170. [PMID: 31203790 DOI: 10.1089/rej.2018.2164] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The senescence of the immune system contributes considerably to the age-related diseases that are the main causes of death after the age of 65. In this study, we present an appealing option for the prevention of immune senescence and slowing or reversing the aging process, which can be achieved by heterochronous autologous hematopoietic stem cell transplantation (haHSCT), where healthy autologous bone marrow stem cells are collected from donors while young, cryopreserved and stored for a long period, and reinfused at a later time when indicated. After reinfusion and homing, these young HSCs could participate in normal hemato- and immunopoiesis and improve several immune functions by expanding the immune- as well as hematopoietic cell repertoire. Several animal studies have already confirmed the feasibility of this procedure, which extended the longevity of the treated animals. If translated to human medicine, haHSCT could prevent or mitigate age-related immune defects and extend the healthy life span. In this review, we describe the concept of haHSCT, recent studies that confirm its feasibility, and discuss the further research needed to translate this heterochronous methodology.
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Affiliation(s)
- Primož Rožman
- Immunohaematology Department, Blood Transfusion Centre of Slovenia, Ljubljana, Slovenia
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11
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Stem cells in Osteoporosis: From Biology to New Therapeutic Approaches. Stem Cells Int 2019; 2019:1730978. [PMID: 31281368 PMCID: PMC6589256 DOI: 10.1155/2019/1730978] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2019] [Revised: 04/21/2019] [Accepted: 04/23/2019] [Indexed: 12/11/2022] Open
Abstract
Osteoporosis is a systemic disease that affects the skeleton, causing reduction of bone density and mass, resulting in destruction of bone microstructure and increased risk of bone fractures. Since osteoporosis is a disease affecting the elderly and the aging of the world's population is constantly increasing, it is expected that the incidence of osteoporosis and its financial burden on the insurance systems will increase continuously and there is a need for more understanding this condition in order to prevent and/or treat it. At present, available drug therapy for osteoporosis primarily targets the inhibition of bone resorption and agents that promote bone mineralization, designed to slow disease progression. Safe and predictable pharmaceutical means to increase bone formation have been elusive. Stem cell therapy of osteoporosis, as a therapeutic strategy, offers the promise of an increase in osteoblast differentiation and thus reversing the shift towards bone resorption in osteoporosis. This review is focused on the current views regarding the implication of the stem cells in the cellular and physiologic mechanisms of osteoporosis and discusses data obtained from stem cell-based therapies of osteoporosis in experimental animal models and the possibility of their future application in clinical trials.
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Smadja DM. Bone Marrow Very Small Embryonic-Like Stem Cells: New Generation of Autologous Cell Therapy Soon Ready for Prime Time? Stem Cell Rev Rep 2019; 13:198-201. [PMID: 28101702 DOI: 10.1007/s12015-017-9718-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Very small embryonic-like stem cells (VSELs) are major pluripotent stem cells described in human and mouse. In this issue of Stem Cell Reviews and Reports, Shaikh and colleagues show in a valuable work that mouse bone marrow collected after 5FU treatment contains VSELs able to undergo in vitro multi-lineage differentiation into cells from all three germ layers and also in germ and hematopoietic cells. These findings are robust since no confounding factor such as feeder cell fusion with VSELs can occur here. This paper allows one to better appreciate bone marrow-VSELs differentiation potential and opens new perspectives for autologous cell therapy. Furthermore, it might help explaining lots of contradictive data from the past 20 years, in particular related to ability of bone marrow cells to differentiate into cardiomyocytes.
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Affiliation(s)
- David M Smadja
- Hematology Department, AP-HP, European Georges Pompidou Hospital, 20 rue Leblanc, 75015, Paris, France. .,Université Paris Descartes, Sorbonne Paris Cité, Paris, France. .,Inserm UMR-S1140, Paris, France.
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13
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Abstract
Immunomodulators regulate stem cell activity at all stages of development as well as during adulthood. Embryonic stem cell (ESC) proliferation as well as neurogenic processes during embryonic development are controlled by factors of the immune system. We review here immunophenotypic expression patterns of different stem cell types, including ESC, neural (NSC) and tissue-specific mesenchymal stem cells (MSC), and focus on immunodulatory properties of these cells. Immune and inflammatory responses, involving actions of cytokines as well as toll-like receptor (TLR) signaling are known to affect the differentiation capacity of NSC and MSC. Secretion of pro- and anti-inflammatory messengers by MSC have been observed as the consequence of TLR and cytokine activation and promotion of differentiation into specified phenotypes. As result of augmented differentiation capacity, stem cells secrete angiogenic factors including vascular endothelial growth factor, resulting in multifactorial actions in tissue repair. Immunoregulatory properties of tissue specific adult stem cells are put into the context of possible clinical applications.
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Golipoor Z, Mehraein F, Zafari F, Alizadeh A, Ababzadeh S, Baazm M. Migration of Bone Marrow-Derived Very Small Embryonic-Like Stem Cells toward An Injured Spinal Cord. CELL JOURNAL 2016; 17:639-47. [PMID: 26862523 PMCID: PMC4746414 DOI: 10.22074/cellj.2016.3836] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Accepted: 10/08/2014] [Indexed: 11/04/2022]
Abstract
OBJECTIVE Bone marrow (BM) is one of the major hematopoietic organs in postnatal life that consists of a heterogeneous population of stem cells which have been previously described. Recently, a rare population of stem cells that are called very small embryonic-like (VSEL) stem cells has been found in the BM. These cells express several developmental markers of pluri- potent stem cells and can be mobilized into peripheral blood (PB) in response to tissue injury. In this study we have attempted to investigate the ability of these cells to migrate toward an injured spinal cord after transplantation through the tail vein in a rat model. MATERIALS AND METHODS In this experimental study, VSELs were isolated from total BM cells using a fluorescent activated cell sorting (FACS) system and sca1 and stage specific embryonic antigen (SSEA-1) antibodies. After isolation, VSELs were cultured for 7 days on C2C12 as the feeder layer. Then, VSELs were labeled with 1,1´-dioctadecyl-3,3,3´,3´- tetramethylindocarbocyanine perchlorate (DiI) and transplanted into the rat spinal cord injury (SCI) model via the tail vein. Finally, we sought to determine the presence of VSELs in the lesion site. RESULTS We isolated a high number of VSELs from the BM. After cultivation, the VSELs colonies were positive for SSEA-1, Oct4 and Sca1. At one month after transplantation, real-time polymerase chain reaction analysis confirmed a significantly increased expres- sion level of Oct4 and SSEA-1 positive cells at the injury site. CONCLUSION VSELs have the capability to migrate and localize in an injured spinal cord after transplantation.
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Affiliation(s)
- Zoleikha Golipoor
- Department of Anatomy, Faculty of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Fereshteh Mehraein
- Department of Anatomy, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Fariba Zafari
- Department of Anatomy, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Akram Alizadeh
- Department of Tissue Engineering, Faculty of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Shima Ababzadeh
- Department of Anatomy, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Maryam Baazm
- Department of Anatomy, Faculty of Medicine, Arak University of Medical Sciences, Arak, Iran
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15
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Abouzaripour M, Pasbakhsh P, Atlasi N, Shahverdi AH, Mahmoudi R, Kashani IR. In Vitro Differentiation of Insulin Secreting Cells from Mouse Bone Marrow Derived Stage-Specific Embryonic Antigen 1 Positive Stem Cells. CELL JOURNAL 2016; 17:701-10. [PMID: 26862529 PMCID: PMC4746420 DOI: 10.22074/cellj.2016.3842] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Accepted: 02/02/2015] [Indexed: 01/08/2023]
Abstract
OBJECTIVE Bone marrow has recently been recognized as a novel source of stem cells for the treatment of wide range of diseases. A number of studies on murine bone mar- row have shown a homogenous population of rare stage-specific embryonic antigen 1 (SSEA-1) positive cells that express markers of pluripotent stem cells. This study focuses on SSEA-1 positive cells isolated from murine bone marrow in an attempt to differentiate them into insulin-secreting cells (ISCs) in order to investigate their differentiation potential for future use in cell therapy. MATERIALS AND METHODS This study is an experimental research. Mouse SSEA-1 positive cells were isolated by Magnetic-activated cell sorting (MACS) followed by characteriza- tion with flow cytometry. Induced SSEA-1 positive cells were differentiated into ISCs with specific differentiation media. In order to evaluate differentiation quality and analysis, dithizone (DTZ) staining was use, followed by reverse transcription polymerase chain reaction (RT-PCR), immunocytochemistry and insulin secretion assay. Statistical results were analyzed by one-way ANOVA. RESULTS The results achieved in this study reveal that mouse bone marrow contains a population of SSEA-1 positive cells that expresses pluripotent stem cells markers such as SSEA-1, octamer-binding transcription factor 4 (OCT-4) detected by immunocytochem- istry and C-X-C chemokine receptor type 4 (CXCR4) and stem cell antigen-1 (SCA-1) detected by flow cytometric analysis. SSEA-1 positive cells can differentiate into ISCs cell clusters as evidenced by their DTZ positive staining and expression of genes such as Pdx1 (pancreatic transcription factors), Ngn3 (endocrine progenitor marker), Insulin1 and Insulin2 (pancreaticβ-cell markers). Additionally, our results demonstrate expression of Pdx1 and Glut2 protein and insulin secretion in response to a glucose challenge in the differentiated cells. CONCLUSION Our study clearly demonstrates the potential of SSEA-1 positive cells to differentiate into insulin secreting cells in defined culture conditions for clinical ap- plications.
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Affiliation(s)
- Morteza Abouzaripour
- Department of Anatomical Sciences, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Parichehr Pasbakhsh
- Department of Anatomical Sciences, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Nader Atlasi
- Department of Anatomical Sciences, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Abdol Hossein Shahverdi
- Department of Embryology, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Medicine, ACECR, Tehran, Iran
| | - Reza Mahmoudi
- Cellular and Molecular Research Center, Yasuj University of Medical Sciences, Yasuj, Iran
| | - Iraj Ragerdi Kashani
- Department of Anatomical Sciences, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
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16
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Seymour T, Twigger AJ, Kakulas F. Pluripotency Genes and Their Functions in the Normal and Aberrant Breast and Brain. Int J Mol Sci 2015; 16:27288-301. [PMID: 26580604 PMCID: PMC4661882 DOI: 10.3390/ijms161126024] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 11/05/2015] [Accepted: 11/06/2015] [Indexed: 12/11/2022] Open
Abstract
Pluripotent stem cells (PSCs) attracted considerable interest with the successful isolation of embryonic stem cells (ESCs) from the inner cell mass of murine, primate and human embryos. Whilst it was initially thought that the only PSCs were ESCs, in more recent years cells with similar properties have been isolated from organs of the adult, including the breast and brain. Adult PSCs in these organs have been suggested to be remnants of embryonic development that facilitate normal tissue homeostasis during repair and regeneration. They share certain characteristics with ESCs, such as an inherent capacity to self-renew and differentiate into cells of the three germ layers, properties that are regulated by master pluripotency transcription factors (TFs) OCT4 (octamer-binding transcription factor 4), SOX2 (sex determining region Y-box 2), and homeobox protein NANOG. Aberrant expression of these TFs can be oncogenic resulting in heterogeneous tumours fueled by cancer stem cells (CSC), which are resistant to conventional treatments and are associated with tumour recurrence post-treatment. Further to enriching our understanding of the role of pluripotency TFs in normal tissue function, research now aims to develop optimized isolation and propagation methods for normal adult PSCs and CSCs for the purposes of regenerative medicine, developmental biology, and disease modeling aimed at targeted personalised cancer therapies.
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Affiliation(s)
- Tracy Seymour
- School of Chemistry and Biochemistry, Faculty of Science, the University of Western Australia, Perth, Western Australia 6009, Australia.
- School of Medicine and Pharmacology, Faculty of Medicine, Dentistry and Health Sciences, the University of Western Australia, Perth, Western Australia 6009, Australia.
| | - Alecia-Jane Twigger
- School of Chemistry and Biochemistry, Faculty of Science, the University of Western Australia, Perth, Western Australia 6009, Australia.
| | - Foteini Kakulas
- School of Chemistry and Biochemistry, Faculty of Science, the University of Western Australia, Perth, Western Australia 6009, Australia.
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17
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Human Very Small Embryonic-Like Stem Cells Are Present in Normal Peripheral Blood of Young, Middle-Aged, and Aged Subjects. Stem Cells Int 2015; 2016:7651645. [PMID: 26633977 PMCID: PMC4655065 DOI: 10.1155/2016/7651645] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Accepted: 03/27/2015] [Indexed: 01/10/2023] Open
Abstract
The purpose of our study was to determine whether the number of human very small embryonic-like stem cells (huVSELs) would vary depending on the age of humans. HuVSELs frequency was evaluated into the steady-state (SS) peripheral blood (PB) of healthy volunteers using flow cytometry analysis. Their numbers were compared with volunteers' age. Blood samples were withdrawn from 28 volunteers (age ranging from 20 to 70 years), who were distributed among three groups of age: “young” (mean age, 27.8 years), “middle” (mean age, 49 years), and “older” (mean age, 64.2 years). Comparing the three groups, we did not observe any statistically significant difference in huVSELs numbers between them. The difference in mRNA expression for PSC markers as SSEA-4, Oct-4, Nanog, and Sox2 between the three groups of age was not statistically significant. A similar frequency of huVSELs into the SS-PB of young, middle-aged, and aged subjects may indicate that the VSELs pool persists all along the life as a reserve for tissue repair in case of minor injury and that there is a continuous efflux of these cells from the BM into the PB.
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18
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Maj M, Schneider G, Ratajczak J, Suszynska M, Kucia M, Ratajczak MZ. The cell cycle- and insulin-signaling-inhibiting miRNA expression pattern of very small embryonic-like stem cells contributes to their quiescent state. Exp Biol Med (Maywood) 2015; 240:1107-11. [PMID: 25966979 DOI: 10.1177/1535370215584940] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Accepted: 03/23/2015] [Indexed: 11/15/2022] Open
Abstract
Murine Oct4(+), very small embryonic-like stem cells (VSELs), are a quiescent stem cell population that requires a supportive co-culture layer to proliferate and/or to differentiate in vitro. Gene expression studies have revealed that the quiescence of these cells is due to changes in expression of parentally imprinted genes, including genes involved in cell cycle regulation and insulin and insulin-like growth factor signaling (IIS). To investigate the role of microRNAs (miRNAs) in VSEL quiescence, we performed miRNA studies in highly purified VSELs and observed a unique miRNA expression pattern in these cells. Specifically, we observed significant differences in the expression of certain miRNA species (relative to a reference cell population), including (i) miRNA-25_1 and miRNA-19 b, whose downregulation has the effect of upregulating cell cycle checkpoint genes and (ii) miRNA-675-3 p and miRNA-675-5 p, miRNA-292-5 p, miRNA-184, and miRNA-125 b, whose upregulation attenuates IIS. These observations are important for understanding the biology of these cells and for developing efficient ex vivo expansion strategies for VSELs isolated from adult tissues.
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Affiliation(s)
- Magdalena Maj
- Stem Cell Institute, James Graham Brown Cancer Center, University of Louisville, Louisville, KY 40202, USA
| | - Gabriela Schneider
- Stem Cell Institute, James Graham Brown Cancer Center, University of Louisville, Louisville, KY 40202, USA
| | - Janina Ratajczak
- Stem Cell Institute, James Graham Brown Cancer Center, University of Louisville, Louisville, KY 40202, USA
| | - Malwina Suszynska
- Stem Cell Institute, James Graham Brown Cancer Center, University of Louisville, Louisville, KY 40202, USA
| | - Magda Kucia
- Stem Cell Institute, James Graham Brown Cancer Center, University of Louisville, Louisville, KY 40202, USA Department of Regenerative Medicine, Warsaw Medical University, Warsaw 02-091, Poland
| | - Mariusz Z Ratajczak
- Stem Cell Institute, James Graham Brown Cancer Center, University of Louisville, Louisville, KY 40202, USA Department of Regenerative Medicine, Warsaw Medical University, Warsaw 02-091, Poland
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19
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Guerin CL, Loyer X, Vilar J, Cras A, Mirault T, Gaussem P, Silvestre JS, Smadja DM. Bone-marrow-derived very small embryonic-like stem cells in patients with critical leg ischaemia: evidence of vasculogenic potential. Thromb Haemost 2015; 113:1084-94. [PMID: 25608764 DOI: 10.1160/th14-09-0748] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Accepted: 12/07/2014] [Indexed: 12/21/2022]
Abstract
Very small embryonic-like stem cells (VSELs) are multipotent stem cells localised in adult bone marrow (BM) that may be mobilised into peripheral blood (PB) in response to tissue injury. We aimed to quantify VSELs in BM and PB of patients with critical limb ischaemia (CLI) and to test their angiogenic potential in vitro as well as their therapeutic capacity in mouse model of CLI. We isolated BM VSELs from patients with CLI and studied their potential to differentiate into vascular lineages. Flow and imaging cytometry showed that VSEL counts were lower in BM (p< 0.001) and higher (p< 0.001) in PB from CLI patients compared to healthy controls, suggesting that ischaemia may trigger VSELs mobilisation in this patient population. Sorted BM-VSELs cultured in angiogenic media acquired a mesenchymal phenotype (CD90+, Thy-1 gene positive expression). VSEL-derived cells had a pattern of secretion similar to that of endothelial progenitor cells, as they released low levels of VEGF-A and inflammatory cytokines. Noteworthy, VSELs triggered post-ischaemic revascularisation in immunodeficient mice (p< 0.05 vs PBS treatment), and acquired an endothelial phenotype either in vitro when cultured in the presence of VEGF-B (Cdh-5 gene positive expression), or in vivo in Matrigel implants (human CD31+ staining in neo-vessels from plug sections). In conclusion, VSELs are a potential new source of therapeutic cells that may give rise to cells of the endothelial lineage in humans.
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Affiliation(s)
| | | | | | | | | | | | | | - David M Smadja
- Prof. David Smadja, European Georges Pompidou Hospital, Hematology Department, 20 rue Leblanc, 75015 Paris, France, Tel.: +31 56093933, Fax: +31 56093393, E-mail:
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20
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Stem Cells in Regenerative Therapy. Bioengineering (Basel) 2015. [DOI: 10.1007/978-3-319-10798-1_9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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21
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Bhartiya D, Hinduja I, Patel H, Bhilawadikar R. Making gametes from pluripotent stem cells--a promising role for very small embryonic-like stem cells. Reprod Biol Endocrinol 2014; 12:114. [PMID: 25421462 PMCID: PMC4255929 DOI: 10.1186/1477-7827-12-114] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Accepted: 09/01/2014] [Indexed: 01/15/2023] Open
Abstract
The urge to have one's own biological child supersedes any desire in life. Several options have been used to obtain gametes including pluripotent stem cells (embryonic ES and induced pluripotent iPS stem cells); gonadal stem cells (spermatogonial SSCs, ovarian OSCs stem cells), bone marrow, mesenchymal cells and fetal skin. However, the field poses a huge challenge including inefficient existing protocols for differentiation, epigenetic and genetic changes associated with extensive in vitro manipulation and also ethical/regulatory constraints. A tremendous leap in the field occurred using mouse ES and iPS cells wherein they were first differentiated into epiblast-like cells and then primordial germ cell-like cells. These on further development produced sperm, oocytes and live offspring (had associated genetic problems). Evidently differentiating pluripotent stem cells into primordial germ cells (PGCs) remains a major bottleneck. Against this backdrop, we propose that a novel population of pluripotent stem cells termed very small embryonic-like stem cells (VSELs) may serve as an alternative, potential source of autologus gametes, keeping in mind that they are indeed PGCs surviving in adult mammalian ovaries and testes. Both VSELs and PGCs are pluripotent, relatively quiescent because of epigenetic modifications of parentally imprinted genes loci like Igf2-H19 and KCNQ1p57, share several markers like Stella, Fragilis, Mvh, Dppa2, Dppa4, Sall4, Blimp1 and functional receptors. VSELs are localized in the basement membrane of seminiferous tubules in testis and in the ovary surface epithelium. Ovarian stem cells from mouse, rabbit, sheep, marmoset and humans (menopausal women and those with premature ovarian failure) spontaneously differentiate into oocyte-like structures in vitro with no additional requirement of growth factors. Thus a more pragmatic option to obtain autologus gametes may be the pluripotent VSELs and if we could manipulate them in vivo - existing ethical and epigenetic/genetic concerns associated with in vitro culture may also be minimized. The field of oncofertility may undergo a sea-change and existing strategies of cryopreservation of gametes and gonadal tissue for fertility preservation in cancer patients will necessitate a revision. However, first the scientific community needs to arrive at a consensus about VSELs in the gonads and then work towards exploiting their potential.
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Affiliation(s)
- Deepa Bhartiya
- />Stem Cell Biology Department, National Institute for Research in Reproductive Health (ICMR), Mumbai, 400 012 India
| | - Indira Hinduja
- />Hinduja IVF Centre, PD Hinduja Hospital and Medical Research Centre, Veer Savarkar Marg, Mumbai, 400 016 India
| | - Hiren Patel
- />Stem Cell Biology Department, National Institute for Research in Reproductive Health (ICMR), Mumbai, 400 012 India
| | - Rashmi Bhilawadikar
- />Hinduja IVF Centre, PD Hinduja Hospital and Medical Research Centre, Veer Savarkar Marg, Mumbai, 400 016 India
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22
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Skowron K, Tomsia M, Czekaj P. An experimental approach to the generation of human embryonic stem cells equivalents. Mol Biotechnol 2014; 56:12-37. [PMID: 24146427 DOI: 10.1007/s12033-013-9702-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Recently, particular attention has been paid to the human embryonic stem cells (hESC) in the context of their potential application in regenerative medicine; however, ethical concerns prevent their clinical application. Induction of pluripotency in somatic cells seems to be a good alternative for hESC recruitment regarding its potential use in tissue regeneration, disease modeling, and drug screening. Since Yamanaka's team in 2006 restored pluripotent state of somatic cells for the first time, a significant progress has been made in the area of induced pluripotent stem cells (iPSC) generation. Here, we review the current state of knowledge in the issue of techniques applied to establish iPSC. Somatic cell nuclear transfer, cell fusion, cell extracts reprogramming, and techniques of direct reprogramming are described. Retroviral and lentiviral transduction are depicted as ways of cell reprogramming with the use of integrating vectors. Contrary to them, adenoviruses, plasmids, single multiprotein expression vectors, and PiggyBac transposition systems are examples of non-integrative vectors used in iPSC generation protocols. Furthermore, reprogramming with the delivery of specific proteins, miRNA or small chemical compounds are presented. Finally, the changes occurring during the reprogramming process are described. It is concluded that subject to some limitations iPSC could become equivalents for hESC in regenerative medicine.
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Affiliation(s)
- Katarzyna Skowron
- Students Scientific Society, Medical University of Silesia, Katowice, Poland
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23
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Yuan J, Zhang D, Wang L, Liu M, Mao J, Yin Y, Ye X, Liu N, Han J, Gao Y, Cheng T, Keefe DL, Liu L. No evidence for neo-oogenesis may link to ovarian senescence in adult monkey. Stem Cells 2014; 31:2538-50. [PMID: 23897655 DOI: 10.1002/stem.1480] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Revised: 06/18/2013] [Accepted: 07/05/2013] [Indexed: 12/15/2022]
Abstract
Female germline or oogonial stem cells transiently residing in fetal ovaries are analogous to the spermatogonial stem cells or germline stem cells (GSCs) in adult testes where GSCs and meiosis continuously renew. Oocytes can be generated in vitro from embryonic stem cells and induced pluripotent stem cells, but the existence of GSCs and neo-oogenesis in adult mammalian ovaries is less clear. Preliminary findings of GSCs and neo-oogenesis in mice and humans have not been consistently reproducible. Monkeys provide the most relevant model of human ovarian biology. We searched for GSCs and neo-meiosis in ovaries of adult monkeys at various ages, and compared them with GSCs from adult monkey testis, which are characterized by cytoplasmic staining for the germ cell marker DAZL and nuclear expression of the proliferative markers PCNA and KI67, and pluripotency-associated genes LIN28 and SOX2, and lack of nuclear LAMIN A, a marker for cell differentiation. Early meiocytes undergo homologous pairing at prophase I distinguished by synaptonemal complex lateral filaments with telomere perinuclear distribution. By exhaustive searching using comprehensive experimental approaches, we show that proliferative GSCs and neo-meiocytes by these specific criteria were undetectable in adult mouse and monkey ovaries. However, we found proliferative nongermline somatic stem cells that do not express LAMIN A and germ cell markers in the adult ovaries, notably in the cortex and granulosa cells of growing follicles. These data support the paradigm that adult ovaries do not undergo germ cell renewal, which may contribute significantly to ovarian senescence that occurs with age.
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Affiliation(s)
- Jihong Yuan
- State Key Laboratory of Medicinal Chemical Biology, The 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics and College of Life Sciences, Nankai University, Tianjin, China; Key Laboratory of Ministry of Health on Hormones and Development, Metabolic Diseases Hospital, Tianjin Medical University, Tianjin, China
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24
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Ratajczak MZ, Marycz K, Poniewierska-Baran A, Fiedorowicz K, Zbucka-Kretowska M, Moniuszko M. Very small embryonic-like stem cells as a novel developmental concept and the hierarchy of the stem cell compartment. Adv Med Sci 2014; 59:273-80. [PMID: 25170822 DOI: 10.1016/j.advms.2014.08.001] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 07/06/2014] [Accepted: 08/04/2014] [Indexed: 01/14/2023]
Abstract
Our current understanding of stem cells suffers from a lack of precision, as the stem cell compartment is a broad continuum between early stages of development and adult postnatal tissues, and it is not fully understood how this transition occurs. The definition of stem cell pluripotency is adapted from embryology and excludes the possibility that some early-development stem cells with pluri- and/or multipotential differentiation potential may reside in postnatal tissues in a dormant state in which they are protected from uncontrolled proliferation and thus do not form teratomas or have the ability to complement blastocyst development. We will discuss the concept that a population of very small embryonic-like stem cells (VSELs) could be a link between early-development stages and adult stem cell compartments and reside in a quiescent state in adult tissues. The epigenetic mechanism identified that changes expression of certain genes involved in insulin/insulin-like growth factor signaling (IIS) in VSELs, on the one hand, keeps these cells quiescent in adult tissues and, on the other hand, provides a novel view of the stem cell compartment, IIS, tissue/organ rejuvenation, aging, and cancerogenesis.
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Affiliation(s)
- Mariusz Z Ratajczak
- Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, Louisville, KY, USA; Department of Physiology, Pomeranian Medical University, Szczecin, Poland.
| | - Krzysztof Marycz
- University of Environmental and Life Sciences, Electron Microscopy Laboratory, Wroclaw, Poland; Wroclaw Research Centre EIT+, Wroclaw, Poland
| | - Agata Poniewierska-Baran
- Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, Louisville, KY, USA; Department of Physiology, Pomeranian Medical University, Szczecin, Poland
| | | | - Monika Zbucka-Kretowska
- Department of Reproduction and Gynecological Endocrinology, Medical University of Bialystok, Bialystok, Poland
| | - Marcin Moniuszko
- Department of Regenerative Medicine and Immune Regulation, Medical University of Bialystok, Bialystok, Poland; Department of Allergology and Internal Medicine, Medical University of Bialystok, Bialystok, Poland
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25
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Lee SJ, Park SH, Kim YI, Hwang S, Kwon PM, Han IS, Kwon BS. Adult stem cells from the hyaluronic acid-rich node and duct system differentiate into neuronal cells and repair brain injury. Stem Cells Dev 2014; 23:2831-40. [PMID: 25027245 DOI: 10.1089/scd.2014.0142] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The existence of a hyaluronic acid-rich node and duct system (HAR-NDS) within the lymphatic and blood vessels was demonstrated previously. The HAR-NDS was enriched with small (3.0-5.0 μm in diameter), adult stem cells with properties similar to those of the very small embryonic-like stem cells (VSELs). Sca-1(+)Lin(-)CD45(-) cells were enriched approximately 100-fold in the intravascular HAR-NDS compared with the bone marrow. We named these adult stem cells "node and duct stem cells (NDSCs)." NDSCs formed colonies on C2C12 feeder layers, were positive for fetal alkaline phosphatase, and could be subcultured on the feeder layers. NDSCs were Oct4(+)Nanog(+)SSEA-1(+)Sox2(+), while VSELs were Oct4(+)Nanog(+)SSEA-1(+)Sox2(-). NDSCs had higher sphere-forming efficiency and proliferative potential than VSELs, and they were found to differentiate into neuronal cells in vitro. Injection of NDSCs into mice partially repaired ischemic brain damage. Thus, we report the discovery of potential adult stem cells that may be involved in tissue regeneration. The intravascular HAR-NDS may serve as a route that delivers these stem cells to their target tissues.
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Affiliation(s)
- Seung J Lee
- 1 Cancer Immunology Branch, National Cancer Center , Ilsan, Gyeonggi, Korea
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26
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Bui HT, Van Thuan N, Kwon DN, Choi YJ, Kang MH, Han JW, Kim T, Kim JH. Identification and characterization of putative stem cells in the adult pig ovary. Development 2014; 141:2235-44. [DOI: 10.1242/dev.104554] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Recently, the concept of ‘neo-oogenesis’ has received increasing attention, since it was shown that adult mammals have a renewable source of eggs. The purpose of this study was to elucidate the origin of these eggs and to confirm whether neo-oogenesis continues throughout life in the ovaries of the adult mammal. Adult female pigs were utilized to isolate, identify and characterize, including their proliferation and differentiation capabilities, putative stem cells (PSCs) from the ovary. PSCs were found to comprise a heterogeneous population based on c-kit expression and cell size, and also express stem and germ cell markers. Analysis of PSC molecular progression during establishment showed that these cells undergo cytoplasmic-to-nuclear translocation of Oct4 in a manner reminiscent of gonadal primordial germ cells (PGCs). Hence, cells with the characteristics of early PGCs are present or are generated in the adult pig ovary. Furthermore, the in vitro establishment of porcine PSCs required the presence of ovarian cell-derived extracellular regulatory factors, which are also likely to direct stem cell niche interactions in vivo. In conclusion, the present work supports a crucial role for c-kit and kit ligand/stem cell factor in stimulating the growth, proliferation and nuclear reprogramming of porcine PSCs, and further suggests that porcine PSCs might be the culture equivalent of early PGCs.
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Affiliation(s)
- Hong-Thuy Bui
- Department of Animal Biotechnology, College of Animal Bioscience & Biotechnology, Konkuk University, Seoul 143-701, Korea
- Department of Biotechnology, School of Biotechnology, International University, Vietnam National University, Ho Chi Minh City 70000, Vietnam
- School of Biotechnology, Tan Tao University, Long An 81000, Vietnam
| | - Nguyen Van Thuan
- Department of Biotechnology, School of Biotechnology, International University, Vietnam National University, Ho Chi Minh City 70000, Vietnam
- School of Biotechnology, Tan Tao University, Long An 81000, Vietnam
| | - Deug-Nam Kwon
- Department of Animal Biotechnology, College of Animal Bioscience & Biotechnology, Konkuk University, Seoul 143-701, Korea
| | - Yun-Jung Choi
- Department of Animal Biotechnology, College of Animal Bioscience & Biotechnology, Konkuk University, Seoul 143-701, Korea
| | - Min-Hee Kang
- Department of Animal Biotechnology, College of Animal Bioscience & Biotechnology, Konkuk University, Seoul 143-701, Korea
| | - Jae-Woong Han
- Department of Animal Biotechnology, College of Animal Bioscience & Biotechnology, Konkuk University, Seoul 143-701, Korea
| | - Teoan Kim
- Department of Physiology, Catholic University of Daegu School of Medicine, Daegu 705718, Korea
| | - Jin-Hoi Kim
- Department of Animal Biotechnology, College of Animal Bioscience & Biotechnology, Konkuk University, Seoul 143-701, Korea
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27
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Kashani IR, Zarnani AH, Soleimani M, Abdolvahabi MA, Nayernia K, Shirazi R. Retinoic acid induces mouse bone marrow-derived CD15⁺, Oct4⁺ and CXCR4⁺ stem cells into male germ-like cells in a two-dimensional cell culture system. Cell Biol Int 2014; 38:782-9. [PMID: 24677291 DOI: 10.1002/cbin.10260] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Accepted: 01/27/2014] [Indexed: 11/06/2022]
Abstract
We have examined the effect of retinoic acid (RA) on differentiation of bone marrow-derived CD15(+) , Oct4(+) and CXCR4(+) cells into male germ cells. Bone marrow stem cells (BMSCs) were isolated from the femur of 3-4-week-old male C57BL/6 mice. Magnetic-activated cell sorting (MACS) system was used to sort CD15(+) , Oct4(+) and CXCR4(+) cells. RT-PCR was used to follow the expression of pluripotency markers. Sorted CD15(+) , Oct4(+) and CXCR4(+) cells were cultured in an undifferentiated condition on a feeder layer of mitomycin C-inactivated C2C12. The embryoid-like bodies were differentiated into male germ cells by retinoic acid. To identify the expression of male germ specific markers, differentiated cells were analysed by means of reverse transcriptase polymerase chain reaction (RT-PCR) and immunofluorescence staining. RT-PCR and immunofluorescence show that bone marrow-derived CD15(+) , Oct4(+) and CXCR4(+) cells express pluripotency markers, Oct4, Nanog, Rex-1, SOX-2 and AP. The purified CD15(+) , Oct4(+) and CXCR4(+) formed structures like embryoid bodies when plated over a feeder layer; these bodies were alkaline phosphatase positive. When cells were induced by RA, bone marrow-derived CD15(+) , Oct4(+) and CXCR4(+) were positive for Mvh, Dazl, Piwil2, Dppa3 and Stra8, that known molecular markers of male germ cells. Thus RA can induce differentiation of mouse bone marrow-derived CD15(+) , Oct4(+) and CXCR4(+) cells into male germ cells in vitro. Negative results for the gene expression analysis of female germ cells markers, GDF9 and ZP3, confirmed this conclusion.
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Affiliation(s)
- Iraj Ragerdi Kashani
- Department of Anatomical Sciences, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
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Sheen YT, Lin TM, Chang KP, Lai CS, Lin SD, Lee SS. Commercially available materials as scaffold candidates for adipose-derived stromal/progenitor cell tissue engineering. FORMOSAN JOURNAL OF SURGERY 2014. [DOI: 10.1016/j.fjs.2013.06.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Igura K, Okada M, Kim HW, Ashraf M. Identification of small juvenile stem cells in aged bone marrow and their therapeutic potential for repair of the ischemic heart. Am J Physiol Heart Circ Physiol 2013; 305:H1354-62. [PMID: 23997098 DOI: 10.1152/ajpheart.00379.2013] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Stem cell-mediated cardiac regeneration is impaired with age. In this study, we identified a novel subpopulation of small juvenile stem cells (SJSCs) isolated from aged bone marrow-derived stem cells (BMSCs) with high proliferation and differentiation potential. SJSCs expressed mesenchymal stem cell markers, CD29(+)/CD44(+)/CD59(+)/CD90(+), but were negative for CD45(-)/CD117(-) as examined by flow cytometry analysis. SJSCs showed higher proliferation, colony formation, and differentiation abilities compared with BMSCs. We also observed that SJSCs significantly expressed cardiac lineage markers (Gata-4 and myocyte-specific enhancer factor 2C) and pluripotency markers (octamer-binding transcription factor 4, sex-determining region Y box 2, stage-specific embryonic antigen 1, and Nanog) as well as antiaging factors such as telomerase reverse transcriptase and sirtuin 1. Interestingly, SJSCs either from young or aged animals showed significantly longer telomere length as well as lower senescence-associated β-galactosidase expression, suggesting that SJSCs possess antiaging properties, whereas aged BMSCs have limited potential for proliferation and differentiation. Furthermore, transplantation of aged SJSCs into the infarcted rat heart significantly reduced the infarction size and improved left ventricular function, whereas transplantation of aged BMSCs was less effective. Moreover, neovascularization as well as cardiomyogenic differentiation in the peri-infarcted area were significantly increased in the SJSC-transplanted group compared with the BMSC-transplated group, as evaluated by immunohistochemical analysis. Taken together, these findings demonstrate that SJSCs possess characteristics of antiaging, pluripotency, and high proliferation and differentiation rates, and, therefore, these cells offer great therapeutic potential for repair of the injured myocardium.
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Affiliation(s)
- Koichi Igura
- Department of Pathology and Lab of Medicine, University of Cincinnati Medical Center, Cincinnati, Ohio
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Miyanishi M, Mori Y, Seita J, Chen JY, Karten S, Chan CKF, Nakauchi H, Weissman IL. Do pluripotent stem cells exist in adult mice as very small embryonic stem cells? Stem Cell Reports 2013; 1:198-208. [PMID: 24052953 PMCID: PMC3757755 DOI: 10.1016/j.stemcr.2013.07.001] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2013] [Revised: 07/02/2013] [Accepted: 07/03/2013] [Indexed: 02/03/2023] Open
Abstract
Very small embryonic-like stem cells (VSELs) isolated from bone marrow (BM) have been reported to be pluripotent. Given their nonembryonic source, they could replace blastocyst-derived embryonic stem cells in research and medicine. However, their multiple-germ-layer potential has been incompletely studied. Here, we show that we cannot find VSELs in mouse BM with any of the reported stem cell potentials, specifically for hematopoiesis. We found that: (1) most events within the "VSEL" flow-cytometry gate had little DNA and the cells corresponding to these events (2) could not form spheres, (3) did not express Oct4, and (4) could not differentiate into blood cells. These results provide a failure to confirm the existence of pluripotent VSELs.
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Affiliation(s)
- Masanori Miyanishi
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
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31
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Stimpfel M, Skutella T, Cvjeticanin B, Meznaric M, Dovc P, Novakovic S, Cerkovnik P, Vrtacnik-Bokal E, Virant-Klun I. Isolation, characterization and differentiation of cells expressing pluripotent/multipotent markers from adult human ovaries. Cell Tissue Res 2013; 354:593-607. [PMID: 23820736 DOI: 10.1007/s00441-013-1677-8] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Accepted: 05/28/2013] [Indexed: 01/19/2023]
Abstract
Pluripotent stem cells are still generally accepted not to exist in adult human ovaries, although increasing studies confirm the presence of pluripotent/multipotent stem cells in adult mammalian ovaries, including those of humans. The aim of this study is to isolate, characterize and differentiate in vitro stem cells that originate from the adult human ovarian cortex and that express markers of pluripotency/multipotency. After enzymatic degradation of small ovarian cortex biopsies retrieved from 18 women, ovarian cell cultures were successfully established from 17 and the formation of cell colonies was observed. The presence of cells/colonies expressing some markers of pluripotency (alkaline phosphatase, surface antigen SSEA-4, OCT4, SOX-2, NANOG, LIN28, STELLA), germinal lineage (DDX4/VASA) and multipotency (M-CAM/CD146, Thy-1/CD90, STRO-1) was confirmed by various methods. Stem cells from the cultures, including small round SSEA-4-positive cells with diameters of up to 4 μm, showed a relatively high degree of plasticity. We were able to differentiate them in vitro into various types of somatic cells of all three germ layers. However, these cells did not form teratoma when injected into immunodeficient mice. Our results thus show that ovarian tissue is a potential source of stem cells with a pluripotent/multipotent character for safe application in regenerative medicine.
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Affiliation(s)
- Martin Stimpfel
- Reproductive Unit, Department of Obstetrics and Gynaecology, University Medical Centre Ljubljana, Slajmerjeva 3, 1000, Ljubljana, SI, Slovenia
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Mierzejewska K, Heo J, Kang JW, Kang H, Ratajczak J, Ratajczak MZ, Kucia M, Shin DM. Genome-wide analysis of murine bone marrow‑derived very small embryonic-like stem cells reveals that mitogenic growth factor signaling pathways play a crucial role in the quiescence and ageing of these cells. Int J Mol Med 2013; 32:281-90. [PMID: 23708325 PMCID: PMC3776718 DOI: 10.3892/ijmm.2013.1389] [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: 02/28/2013] [Accepted: 05/14/2013] [Indexed: 01/01/2023] Open
Abstract
It has been postulated that the most primitive population of stem cells, Oct4+Sca-1+Lin−CD45− very small embryonic-like stem cells (VSELs), differentiate into tissue-committed stem cells in adult mice. However, Oct4+ VSELs remain quiescent in adult tissues and do not form teratomas. In thi study, we report the characteristics of the VSEL transcriptome by gene set enrichment analysis employing a microarray database established from 20 murine bone marrow-derived, FACS-sorted VSELs in comparison with hematopoietic stem cells and embryonic stem cells. In the Oct4+ VSELs, we observed the upregulation of tissue-specific gene sets and a gene set encoding the complement-coagulation cascade. By contrast, in the VSELs, we observed the downregulation of genes involved in the UV radiation response, mRNA processing and mitogenic growth factor signaling [e.g., insulin-like growth factor-1 (IGF-1) and neurotrophic tyrosine kinase receptor A (TRKA), as well as the ERK and PI3K pathways]. Employing leading-edge subset analysis and real-time PCR assays, we observed that several genes, such as growth factor receptor-bound protein 2 (GRB2), son of sevenless homolog 1 (SOS1), SHC (Src homology 2 domain containing) transforming protein 1 (SHC1), mitogen-activated protein kinase kinase 1 (MAP2K1), v-akt murine thymoma viral oncogene homolog 3 (AKT3), ELK1, ribosomal protein S6 kinase, 90kDa, polypeptide 3 (RPS6KA3), glycogen synthase kinase 3β (GSK3β) and casein kinase 2, alpha 1 polypeptide (CSNK2A1), which are involved in mitogenic growth factor signaling pathways, were commonly downregulated in the VSELs. Notably, this repression was reversed in the VSELs co-cultured over a C2C12 supportive cell-line, whereby they are induced to form VSEL-derived spheres (VSEL-DSs); thus, they are enriched, forming more differentiated stem cells. Therefore, we suggest that the repression of mitogenic growth factor signaling (e.g., through the IGF-1 receptor) may prevent uncontrolled Oct4+ VSEL proliferation and teratoma formation. Thus, restoring the responsiveness to mitogenic growth factors may be a crucial step in employing these cells in regenerative medicine.
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Affiliation(s)
- Katarzyna Mierzejewska
- Stem Cell Institute at the James Graham Brown Cancer Center, University of Louisville, Louisville, KY, USA
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Rennert RC, Sorkin M, Garg RK, Gurtner GC. Stem cell recruitment after injury: lessons for regenerative medicine. Regen Med 2013; 7:833-50. [PMID: 23164083 DOI: 10.2217/rme.12.82] [Citation(s) in RCA: 116] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Tissue repair and regeneration are thought to involve resident cell proliferation as well as the selective recruitment of circulating stem and progenitor cell populations through complex signaling cascades. Many of these recruited cells originate from the bone marrow, and specific subpopulations of bone marrow cells have been isolated and used to augment adult tissue regeneration in preclinical models. Clinical studies of cell-based therapies have reported mixed results, however, and a variety of approaches to enhance the regenerative capacity of stem cell therapies are being developed based on emerging insights into the mechanisms of progenitor cell biology and recruitment following injury. This article discusses the function and mechanisms of recruitment of important bone marrow-derived stem and progenitor cell populations following injury, as well as the emerging therapeutic applications targeting these cells.
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Affiliation(s)
- Robert C Rennert
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic & Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, 257 Campus Drive West, Hagey Building GK-201, Stanford, CA 94305-5148, USA
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Tsao J, Vernet DA, Gelfand R, Kovanecz I, Nolazco G, Bruhn KW, Gonzalez-Cadavid NF. Myostatin genetic inactivation inhibits myogenesis by muscle-derived stem cells in vitro but not when implanted in the mdx mouse muscle. Stem Cell Res Ther 2013; 4:4. [PMID: 23295128 PMCID: PMC3706886 DOI: 10.1186/scrt152] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2012] [Accepted: 01/03/2013] [Indexed: 01/07/2023] Open
Abstract
Introduction Stimulating the commitment of implanted dystrophin+ muscle-derived stem cells (MDSCs) into myogenic, as opposed to lipofibrogenic lineages, is a promising therapeutic strategy for Duchenne muscular dystrophy (DMD). Methods To examine whether counteracting myostatin, a negative regulator of muscle mass and a pro-lipofibrotic factor, would help this process, we compared the in vitro myogenic and fibrogenic capacity of MDSCs from wild-type (WT) and myostatin knockout (Mst KO) mice under various modulators, the expression of key stem cell and myogenic genes, and the capacity of these MDSCs to repair the injured gastrocnemius in aged dystrophic mdx mice with exacerbated lipofibrosis. Results Surprisingly, the potent in vitro myotube formation by WT MDSCs was refractory to modulators of myostatin expression or activity, and the Mst KO MDSCs failed to form myotubes under various conditions, despite both MDSC expressing Oct 4 and various stem cell genes and differentiating into nonmyogenic lineages. The genetic inactivation of myostatin in MDSCs was associated with silencing of critical genes for early myogenesis (Actc1, Acta1, and MyoD). WT MDSCs implanted into the injured gastrocnemius of aged mdx mice significantly improved myofiber repair and reduced fat deposition and, to a lesser extent, fibrosis. In contrast to their in vitro behavior, Mst KO MDSCs in vivo also significantly improved myofiber repair, but had few effects on lipofibrotic degeneration. Conclusions Although WT MDSCs are very myogenic in culture and stimulate muscle repair after injury in the aged mdx mouse, myostatin genetic inactivation blocks myotube formation in vitro, but the myogenic capacity is recovered in vivo under the influence of the myostatin+ host-tissue environment, presumably by reactivation of key genes originally silenced in the Mst KO MDSCs.
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Bartke A, Westbrook R, Sun L, Ratajczak M. Links between growth hormone and aging. ENDOKRYNOLOGIA POLSKA 2013; 64:46-52. [PMID: 23450447 PMCID: PMC3647466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Studies in mutant, gene knock-out and transgenic mice have demonstrated that growth hormone (GH) signalling has a major impact on ageing and longevity. Growth hormone-resistant and GH-deficient animals live much longer than their normal siblings, while transgenic mice overexpressing GH are short lived. Actions of GH in juvenile animals appear to be particularly important for life extension and responsible for various phenotypic characteristics of long-lived hypopituitary mutants. Available evidence indicates that reduced GH signalling is linked to extended longevity by multiple interacting mechanisms including increased stress resistance, reduced growth, altered profiles of cytokines produced by the adipose tissue, and various metabolic adjustments such as enhanced insulin sensitivity, increased oxygen consumption (VO2/g) and reduced respiratory quotient. The effects of removing visceral fat indicate that increased levels of adiponectin and reduced levels of pro-inflammatory cytokines in GH-resistant mice are responsible for their increased insulin sensitivity. Increased VO2 apparently represents increased energy expenditure for thermogenesis, because VO2 of mutant and normal mice does not differ at thermoneutral temperature. Recent studies identified GH- and IGF-1-dependent maintenance of bone marrow populations of very small embryonic-like stem cells (VSELs) as another likely mechanism of delayed ageing and increased longevity of GH-deficient and GH-resistant animals. Many of the physiological characteristics of long-lived, GH-related mouse mutants are shared by exceptionally long-lived people and by individuals genetically predisposed to longevity.
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Affiliation(s)
- Andrzej Bartke
- Department of Internal Medicine, Southern Illinois University School of Medicine, Springfield, IL 62794, United States.
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36
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Acupuncture Stimulation Induces Neurogenesis in Adult Brain. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2013; 111:67-90. [DOI: 10.1016/b978-0-12-411545-3.00004-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Celik O, Celik E, Turkcuoglu I, Yilmaz E, Simsek Y, Tiras B. Germline cells in ovarian surface epithelium of mammalians: a promising notion. Reprod Biol Endocrinol 2012; 10:112. [PMID: 23245287 PMCID: PMC3566967 DOI: 10.1186/1477-7827-10-112] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2012] [Accepted: 12/14/2012] [Indexed: 01/03/2023] Open
Abstract
It is a long held doctrine in reproductive biology that women are born with a finite number of oocytes and there is no oogenesis during the postnatal period. However, recent evidence challenges this by showing the presence of germ line stem cells in the human ovarian surface epithelium (OSE), which can serve as a source of germ cells, and differentiate into oocyte like structures. Postnatal renewal of oocytes may have enormous therapeutic potential especially in women facing the risk of premature ovarian failure idiopathically or iatrogenically after exposure to gonadotoxic chemotherapy and radiation for cancer therapy.This article reviews current knowledge on germ line stem cells in human OSE.
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Affiliation(s)
- Onder Celik
- Department of Obstetrics and Gynecology, Inonu University, Medical Faculty, Malatya, Turkey
| | - Ebru Celik
- Department of Obstetrics and Gynecology, Inonu University, Medical Faculty, Malatya, Turkey
| | - Ilgin Turkcuoglu
- Department of Obstetrics and Gynecology, Inonu University, Medical Faculty, Malatya, Turkey
| | - Ercan Yilmaz
- Department of Obstetrics and Gynecology, Inonu University, Medical Faculty, Malatya, Turkey
| | - Yavuz Simsek
- Department of Obstetrics and Gynecology, Inonu University, Medical Faculty, Malatya, Turkey
| | - Bulent Tiras
- Department of Obstetric and Gynecology, Acibadem University, School of Medicine, Istanbul, Turkey
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Peripheral blood stem cells: phenotypic diversity and potential clinical applications. Stem Cell Rev Rep 2012; 8:917-25. [PMID: 22451417 DOI: 10.1007/s12015-012-9361-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A small proportion of cells in peripheral blood are actually pluripotent stem cells. These peripheral blood stem cells (PBSCs) are thought to be heterogeneous and could be exploited for a variety of clinical applications. The exact number of distinct populations is unknown. It is likely that individual PBSC populations detected by different experimental strategies are similar or overlapping but have been assigned different names. In this mini review, we divide PBSCs into seven groups: hematopoietic stem cells (HSCs), CD34- stem cells, CD14+ stem cells, mesenchymal stem cells (MSCs), very small embryonic-like (VSEL) stem cells, endothelial progenitor cells (EPCs), and other pluripotent stem cells. We review the major characteristics of these stem/progenitor cell populations and their potential applications in ophthalmology.
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Ratajczak MZ, Shin DM, Schneider G, Ratajczak J, Kucia M. Parental imprinting regulates insulin-like growth factor signaling: a Rosetta Stone for understanding the biology of pluripotent stem cells, aging and cancerogenesis. Leukemia 2012; 27:773-9. [PMID: 23135355 DOI: 10.1038/leu.2012.322] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
In recent years, solid evidence has accumulated that insulin-like growth factor-1 (IGF-1) and 2 (IGF-2) regulate many biological processes in normal and malignant cells. Recently, more light has been shed on the epigenetic mechanisms regulating expression of genes involved in IGF signaling (IFS) and it has become evident that these mechanisms are crucial for initiation of embryogenesis, maintaining the quiescence of pluripotent stem cells deposited in adult tissues (for example, very-small embryonic-like stem cells), the aging process, and the malignant transformation of cells. The expression of several genes involved in IFS is regulated at the epigenetic level by imprinting/methylation within differentially methylated regions (DMRs), which regulate their expression from paternal or maternal chromosomes. The most important role in the regulation of IFS gene expression is played by the Igf-2-H19 locus, which encodes the autocrine/paracrine mitogen IGF-2 and the H19 gene, which gives rise to a non-coding RNA precursor of several microRNAs that negatively affect cell proliferation. Among these, miR-675 has recently been demonstrated to downregulate expression of the IGF-1 receptor. The proper imprinting of DMRs at the Igf-2-H19 locus, with methylation of the paternal chromosome and a lack of methylation on the maternal chromosome, regulates expression of these genes so that Igf-2 is transcribed only from the paternal chromosome and H19 (including miR-675) only from the maternal chromosome. In this review, we will discuss the relevance of (i) proper somatic imprinting, (ii) erasure of imprinting and (iii) loss of imprinting within the DMRs at the Igf-2-H19 locus to the expression of genes involved in IFS, and the consequences of these alternative patterns of imprinting for stem cell biology.
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Affiliation(s)
- M Z Ratajczak
- Stem Cell Biology Program at the James Graham Brown Cancer Center, University of Louisville, Louisville, KY, USA
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40
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Havens AM, Shiozawa Y, Jung Y, Sun H, Wang J, McGee S, Mishra A, Taichman LS, Danciu T, Jiang Y, Yavanian G, Leary E, Krebsbach PH, Rodgerson D, Taichman RS. Human very small embryonic-like cells generate skeletal structures, in vivo. Stem Cells Dev 2012; 22:622-30. [PMID: 23020187 DOI: 10.1089/scd.2012.0327] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Human very small embryonic-like (hVSEL) cells are a resident population of multipotent stem cells in the bone marrow involved in the turnover and regeneration of tissues. The levels of VSEL cells in blood are greatly increased in response to injury, and they have been shown to repair injured tissues. Adult hVSEL cells, SSEA-4(+)/CD133(+)/CXCR4(+)/Lin(-)/CD45(-), express the pluripotency markers (Oct-4 and Nanog) and may be able to differentiate into cells from all 3 germ lineages. hVSEL cells isolated from blood by apheresis following granulocyte-colony-stimulating factor mobilization were fractionated and enriched by elutriation and fluorescence activated cell sorting. Collagen sponge scaffolds containing 2,000-30,000 hVSEL cells were implanted into cranial defects generated in SCID mice. Analysis by microcomputed tomography showed that a cell population containing VSEL cells produced mineralized tissue within the cranial defects compared with controls at 3 months. Histologic studies showed significant bone formation and cellular organization within the defects compared with cellular or scaffold controls alone. Antibodies to human leukocyte antigens demonstrated that the newly generated tissues were of human origin. Moreover, human osteocalcin was identified circulating in the peripheral blood. There was evidence that some level of hVSEL cells migrated away from the defect site, using quantitative real-time polymerase chain reaction to detect for human-specific Alu sequences. This study demonstrates that hVSEL cells are able to generate human bone tissue in a mouse model of skeletal repair. These studies lay the foundation for future cell-based regenerative therapies for osseous and connective tissue disorders, including trauma and degenerative conditions, such as osteoporosis, fracture repair, and neoplastic repair.
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Affiliation(s)
- Aaron M Havens
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, Michigan 48109-1078, USA
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Ratajczak MZ, Shin DM, Liu R, Mierzejewska K, Ratajczak J, Kucia M, Zuba-Surma EK. Very small embryonic/epiblast-like stem cells (VSELs) and their potential role in aging and organ rejuvenation--an update and comparison to other primitive small stem cells isolated from adult tissues. Aging (Albany NY) 2012; 4:235-46. [PMID: 22498452 PMCID: PMC3371759 DOI: 10.18632/aging.100449] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Very small embryonic-like stem cells (VSELs) are a population of developmentally early stem cells residing in adult tissues. These rare cells, which are slightly smaller than red blood cells, i) become mobilized during stress situations into peripheral blood, ii) are enriched in the Sca1+Lin−CD45− cell fraction in mice and the CD133+ Lin−CD45− cell fraction in humans, iii) express markers of pluripotent stem cells (e.g., Oct4, Nanog, and SSEA), and iv) display a distinct morphology characterized by a high nuclear/cytoplasmic ratio and undifferentiated chromatin. Recent evidence indicates that murine VSELs are kept quiescent in adult tissues and protected from teratoma formation by epigenetic modification of imprinted genes that regulate insulin/insulin like growth factor signaling (IIS). The successful reversal of these epigenetic changes in VSELs that render them quiescent will be crucial for efficient expansion of these cells. The most recent data in vivo from our and other laboratories demonstrated that both murine and human VSELs exhibit some characteristics of long-term repopulating hematopoietic stem cells (LT-HSCs), are at the top of the hierarchy in the mesenchymal lineage, and may differentiate into organ-specific cells (e.g., cardiomyocytes). Moreover, as recently demonstrated the number of these cells positively correlates in several murine models with longevity. Finally, while murine BM-derived VSELs have been extensively characterized more work is needed to better characterize these small cells at the molecular level in humans.
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Affiliation(s)
- Mariusz Z Ratajczak
- Stem Cell Biology Program at the James Graham Brown Cancer Center, University of Louisville, Louisville, KT, USA.
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Abstract
One of the most intriguing questions in stem cell biology is whether pluripotent stem cells exist in adult tissues. Several groups of investigators employing i) various isolation protocols, ii) detection of surface markers, and iii) experimental in vitro and in vivo models, have reported the presence of cells that possess a pluripotent character in adult tissues. Such cells were assigned various operational abbreviations and names in the literature that added confusion to the field and raised the basic question of whether these are truly distinct or overlapping populations of the same primitive stem cells. Unfortunately, these cells were never characterized side-by-side to address this important issue. Nevertheless, taking into consideration their common features described in the literature, it is very likely that various investigators have described overlapping populations of developmentally early stem cells that are closely related. These different populations of stem cells will be reviewed in this paper.
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Abstract
A critical comparison of the attributes of several types of stem cells is presented, with particular emphasis on properties that are critical for the application of these cells for therapeutic purposes. The importance of an autologous source of pluripotent stem cells is stressed. It is apparent that two sources currently exist for non-embryonic pluripotent stem cells--very small embryonic-like stem cells (VSELs) and induced pluripotent stem cells (iPS). The impact of the emerging iPS research on therapy is considered.
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Affiliation(s)
- Denis O Rodgerson
- NeoStem, Inc., 420 Lexington Avenue, Suite 450, New York, NY 10170, USA.
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Shao H, Xu Q, Wu Q, Ma Q, Salgueiro L, Wang J, Eton D, Webster KA, Yu H. Defective CXCR4 expression in aged bone marrow cells impairs vascular regeneration. J Cell Mol Med 2012; 15:2046-56. [PMID: 21143386 PMCID: PMC3076550 DOI: 10.1111/j.1582-4934.2010.01231.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
The chemokine stromal cell-derived factor-1 (SDF-1) plays a critical role in mobilizing precursor cells in the bone marrow and is essential for efficient vascular regeneration and repair. We recently reported that calcium augments the expression of chemokine receptor CXCR4 and enhances the angiogenic potential of bone marrow derived cells (BMCs). Neovascularization is impaired by aging therefore we suggested that aging may cause defects of CXCR4 expression and cellular responses to calcium. Indeed we found that both the basal and calcium-induced surface expression of CXCR4 on BMCs was significantly reduced in 25-month-old mice compared with 2-month-old mice. Reduced Ca-induced CXCR4 expression in BMC from aged mice was associated with defective calcium influx. Diminished CXCR4 surface expression in BMC from aged mice correlated with diminished neovascularization in an ischemic hindlimb model with less accumulation of CD34+ progenitor cells in the ischemic muscle with or without local overexpression of SDF-1. Intravenous injection of BMCs from old mice homed less efficiently to ischemic muscle and stimulated significantly less neovascularization compared with the BMCs from young mice. Transplantation of old BMCs into young mice did not reconstitute CXCR4 functions suggesting that the defects were not reversible by changing the environment. We conclude that defects of basal and calcium-regulated functions of the CXCR4/SDF-1 axis in BMCs contribute significantly to the age-related loss of vasculogenic responses.
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Affiliation(s)
- Hongwei Shao
- Vascular Biology Institute, University of Miami, Miller School of Medicine, Miami, FL, USA
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45
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Borlongan CV, Glover LE, Tajiri N, Kaneko Y, Freeman TB. The great migration of bone marrow-derived stem cells toward the ischemic brain: therapeutic implications for stroke and other neurological disorders. Prog Neurobiol 2011; 95:213-28. [PMID: 21903148 PMCID: PMC3185169 DOI: 10.1016/j.pneurobio.2011.08.005] [Citation(s) in RCA: 163] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2011] [Revised: 08/10/2011] [Accepted: 08/15/2011] [Indexed: 02/08/2023]
Abstract
Accumulating laboratory studies have implicated the mobilization of bone marrow (BM)-derived stem cells in brain plasticity and stroke therapy. This mobilization of bone cells to the brain is an essential concept in regenerative medicine. Over the past ten years, mounting data have shown the ability of bone marrow-derived stem cells to mobilize from BM to the peripheral blood (PB) and eventually enter the injured brain. This homing action is exemplified in BM stem cell mobilization following ischemic brain injury. Various BM-derived cells, such as hematopoietic stem cells (HSCs), mesenchymal stem cells (MSCs), endothelial progenitor cells (EPCs) and very small embryonic-like cells (VSELs) have been demonstrated to exert therapeutic benefits in stroke. Here, we discuss the current status of these BM-derived stem cells in stroke therapy, with emphasis on possible cellular and molecular mechanisms of action that mediate the cells' beneficial effects in the ischemic brain. When possible, we also discuss the relevance of this therapeutic regimen in other central nervous system (CNS) disorders.
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Affiliation(s)
- Cesar V Borlongan
- Department of Neurosurgery and Brain Repair, University of South Florida College of Medicine, 12901 Bruce B. Downs Blvd, Tampa, FL 33612, USA.
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Zuba-Surma EK, Wojakowski W, Ratajczak MZ, Dawn B. Very small embryonic-like stem cells: biology and therapeutic potential for heart repair. Antioxid Redox Signal 2011; 15:1821-34. [PMID: 21194389 PMCID: PMC3159118 DOI: 10.1089/ars.2010.3817] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Very small embryonic-like stem cells (VSELs) represent a population of extremely small nonhematopoietic pluripotent cells that are negative for lineage markers and express Sca-1 in mice and CD133 in humans. Their embryonic-like characteristics include the expression of markers of pluripotency; the ability to give rise to cellular derivatives of all three germ-layers; and the ability to form embryoid-like bodies. Indeed, quiescent VSELs may represent the remnants of epiblast-derived cells in adult organs. After tissue injury, including acute myocardial infarction (MI), bone marrow-derived VSELs are mobilized into the peripheral blood and home to the damaged organ. Given the ability of VSELs to differentiate into cardiomyocytes and endothelial cells, and their ability to secrete various cardioprotective growth factors/cytokines, VSELs may serve as an ideal cellular source for cardiac repair. Consistently, transplantation of VSELs after an acute MI improves left ventricular (LV) structure and function, and these benefits remain stable during long-term follow-up. Although the mechanisms remain under investigation, effects of secreted factors, regeneration of cellular constituents, and stimulation of endogenous stem/progenitors may play combinatorial roles. The purpose of this review is to summarize the current evidence regarding the biologic features of VSELs, and to discuss their potential as cellular substrates for therapeutic cardiac repair.
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Affiliation(s)
- Ewa K Zuba-Surma
- Department of Medical Biotechnology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
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Nam MH, Yin CS, Soh KS, Choi SH. Adult Neurogenesis and Acupuncture Stimulation at ST36. J Acupunct Meridian Stud 2011; 4:153-8. [DOI: 10.1016/j.jams.2011.09.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2011] [Accepted: 06/21/2011] [Indexed: 10/17/2022] Open
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Virant-Klun I, Skutella T, Cvjeticanin B, Stimpfel M, Sinkovec J. Serous papillary adenocarcinoma possibly related to the presence of primitive oocyte-like cells in the adult ovarian surface epithelium: a case report. J Ovarian Res 2011; 4:13. [PMID: 21827672 PMCID: PMC3174112 DOI: 10.1186/1757-2215-4-13] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2011] [Accepted: 08/09/2011] [Indexed: 11/10/2022] Open
Abstract
INTRODUCTION The presence of oocytes in the ovarian surface epithelium has already been confirmed in the fetal ovaries. We report the presence of SSEA-4, SOX-2, VASA and ZP2-positive primitive oocyte-like cells in the adult ovarian surface epithelium of a patient with serous papillary adenocarcinoma. CASE PRESENTATION Ovarian tissue was surgically retrieved from a 67-year old patient. Histological analysis revealed serous papillary adenocarcinoma. A proportion of ovarian cortex sections was deparaffinized and immunohistochemically stained for the expression of markers of pluripotency SSEA-4 and SOX-2 and oocyte-specific markers VASA and ZP2. The analysis confirmed the presence of round, SSEA-4, SOX-2, VASA and ZP2-positive primitive oocyte-like cells in the ovarian surface epithelium. These cells were possibly related to the necrotic malignant tissue. CONCLUSION Primitive oocyte-like cells present in the adult ovarian surface epithelium persisting probably from the fetal period of life or developed from putative stem cells are a pathological condition which is not observed in healthy adult ovaries, and might be related to serous papillary adenocarcinoma manifestation in the adult ovarian surface epithelium. This observation needs attention to be further investigated.
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Affiliation(s)
- Irma Virant-Klun
- Department of Obstetrics and Gynecology, University Medical Centre Ljubljana, Slovenia.
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A novel insight into aging: are there pluripotent very small embryonic-like stem cells (VSELs) in adult tissues overtime depleted in an Igf-1-dependent manner? Aging (Albany NY) 2011; 2:875-83. [PMID: 21084728 PMCID: PMC3006029 DOI: 10.18632/aging.100231] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Tissue and organ rejuvenation and senescence/aging are closely related to the function of stem cells. Recently, we demonstrated that a population of pluripotent Oct-4+ SSEA-1+Sca-1+Lin-CD45- very small embryonic-like stem cells (VSELs) resides in the adult murine bone marrow (BM) and other murine tissues. We hypothesize that these pluripotent stem cells play an important role in tissue/organ rejuvenation, and have demonstrated that their proliferation and potentially premature depletion is negatively controlled by epigenetic changes of some imprinted genes that regulate insulin factor signaling (Igf2-H19 locus, Igf2R and RasGRF1). Since the attenuation of insulin/insulin growth factor (Ins/Igf) signaling positively correlates with longevity, we propose, based on our experimental data, that gradual decrease in the number of VSELs deposited in adult tissues, which occurs throughout life in an Ins/Igf signaling-dependent manner is an important mechanism of aging. In contrast, a decrease in Ins/Igf stimulation of VSELs that extends the half life of these cells in adult organs would have a beneficial effect on life span. Our preliminary data in long-living Igf-1-signaling-deficient mice show that these animals possess a 3-4 times higher number of VSELs deposited in adult BM, lending support to this novel hypothesis.
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Ratajczak MZ, Liu R, Ratajczak J, Kucia M, Shin DM. The role of pluripotent embryonic-like stem cells residing in adult tissues in regeneration and longevity. Differentiation 2011; 81:153-61. [PMID: 21339038 DOI: 10.1016/j.diff.2011.01.006] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2010] [Revised: 12/01/2010] [Accepted: 01/11/2011] [Indexed: 02/01/2023]
Abstract
From the point of view of regenerative potential, the most important cells are pluripotent stem cells (PSCs). Such cells must fulfill certain in vitro as well as in vivo criteria that have been established by work with PSCs isolated from embryos, which are known as embryonic stem cells (ESCs). According to these criteria, pluripotent stem cells should: (i) give rise to cells from all three germ layers, (ii) complete blastocyst development, and (iii) form teratomas after inoculation into experimental animals. Unfortunately, in contrast to immortalized embryonic ESC lines or induced PSCs (iPSCs), these last two criteria have thus far not been obtained in a reproducible manner for any potential PSC candidates isolated from adult tissues. There are two possible explanations for this failure. The first is that PSCs isolated from adult tissues are not fully pluripotent; the second is that there are some physiological mechanisms involved in keeping these cells quiescent in adult tissues that preclude their "unleashed proliferation", thereby avoiding the risk of teratoma formation. In this review we present an evidence that adult tissues contain remnants from development; a population of PSCs that is deposited in various organs as a backup for primitive stem cells, plays a role in rejuvenation of the pool of more differentiated tissue-committed stem cells (TCSCs), and is involved in organ regeneration. These cells share several markers with epiblast/germ line cells and have been named very small embryonic-like stem cells (VSELs). We suggest that, on one hand, VSELs maintain mammalian life span but, on the other hand, they may give rise to several malignancies if they mutate. We provide an evidence that the quiescent state of these cells in adult tissues, which prevents teratoma formation, is the result of epigenetic changes in some of the imprinted genes.
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Affiliation(s)
- Mariusz Z Ratajczak
- Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, Louisville, KY 40202, USA
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