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Proteomic Analysis of Murine Bone Marrow Very Small Embryonic-like Stem Cells at Steady-State Conditions and after In Vivo Stimulation by Nicotinamide and Follicle-Stimulating Factor Reflects their Germ-Lineage Origin and Multi Germ Layer Differentiation Potential. Stem Cell Rev Rep 2023; 19:120-132. [PMID: 35986128 PMCID: PMC9823037 DOI: 10.1007/s12015-022-10445-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/09/2022] [Indexed: 01/29/2023]
Abstract
Very small embryonic-like stem cells (VSELs) are a dormant population of development early stem cells deposited in adult tissues that as demonstrated contribute to tissue/organ repair and regeneration. We postulated developmental relationship of these cells to migrating primordial germ cells (PGCs) and explained the quiescent state of these cells by the erasure of differently methylated regions (DMRs) at some of the paternally imprinted genes involved in embryogenesis. Recently, we reported that VSELs began to proliferate and expand in vivo in murine bone marrow (BM) after exposure to nicotinamide (NAM) and selected pituitary and gonadal sex hormones. In the current report, we performed proteomic analysis of VSELs purified from murine bone marrow (BM) after repeated injections of NAM + Follicle-Stimulating Hormone (FSH) that in our previous studies turned out to be an effective combination to expand these cells. By employing the Gene Ontology (GO) resources, we have performed a combination of standard GO annotations (GO-CAM) to produce a network between BM steady-state conditions VSELs (SSC-VSELS) and FSH + NAM expanded VSELs (FSH + NAM VSELs). We have identified several GO biological processes regulating development, organogenesis, gene expression, signal transduction, Wnt signaling, insulin signaling, cytoskeleton organization, cell adhesion, inhibiting apoptosis, responses to extra- and intracellular stimuli, protein transport and stabilization, protein phosphorylation and ubiquitination, DNA repair, immune response, and regulation of circadian rhythm. We report that VSELs express a unique panel of proteins that only partially overlapped with the proteome of BM - derived hematopoietic stem cells (HSCs) and hematopoietic mononuclear cells (MNCs) and respond to FSH + NAM stimulation by expressing proteins involved in the development of all three germ layers. Thus, our current data supports further germ-lineage origin and multi germ layer differentiation potential of these cells.
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Xie DM, Li YL, Li J, Li Q, Lu G, Zhai Y, Zhang J, Huang Z, Gao X. CD51 distinguishes a subpopulation of bone marrow mesenchymal stem cells with distinct migratory potential: a novel cell-based strategy to treat acute myocardial infarction in mice. Stem Cell Res Ther 2019; 10:331. [PMID: 31747966 PMCID: PMC6865070 DOI: 10.1186/s13287-019-1439-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 09/20/2019] [Accepted: 10/01/2019] [Indexed: 11/22/2022] Open
Abstract
Background Experimental and clinical trials have demonstrated the efficiency of bone marrow-derived mesenchymal stromal/stem cells (bMSCs) in the treatment of myocardial infarction. However, after intravenous injection, the ineffective migration of engrafted bMSCs to the hearts remains an obstacle, which has an undesirable impact on the efficiency of cell-based therapy. Therefore, we attempted to identify a marker that could distinguish a subpopulation of bMSCs with a promising migratory capacity. Methods Here, CD51-negative and CD51-positive cells were isolated by flow cytometry from Ter119−CD45−CD31−bMSCs and cultured in specifically modified medium. The proliferation ability of the cells was evaluated by 5-ethynyl-2′-deoxyuridine (EdU) staining or continuously monitored during culture, and the differentiation potential was assessed by culturing the cells in the appropriate conditioned media. Wound healing assays, transwell assays and quantitative polymerase chain reaction (qPCR) were used to measure the migratory ability. The mice were subjected to a sham operation or myocardial infarction (MI) by permanently occluding the coronary artery, and green fluorescent protein (GFP)-labelled cells were transplanted into the mice via intravenous infusion immediately after MI. Heart function was measured by echocardiography; infarct myocardium tissues were detected by triphenyl tetrazolium chloride (TTC) staining. Additionally, immunofluorescence staining was used to verify the characteristics of CD51+bMSCs and inflammatory responses in vivo. Statistical comparisons were performed using a two-tailed Student’s t test. Results In this study, the isolated CD51−bMSCs and CD51+bMSCs, especially the CD51+ cells, presented a favourable proliferative capacity and could differentiate into adipocytes, osteocytes and chondrocytes in vitro. After the cells were transplanted into the MI mice by intravenous injection, the therapeutic efficiency of CD51+bMSCs in improving left ventricular ejection fraction (LVEF) and left ventricular fractional shortening (LVFS) was better than that of CD51−bMSCs. Compared with CD51−bMSCs, CD51+bMSCs preferentially migrated to and were retained in the infarcted hearts at 48 h and 8 days after intravenous injection. Accordingly, the migratory capacity of CD51+bMSCs exceeded that of CD51−bMSCs in vitro, and the former cells expressed higher levels of chemokine receptors or ligands. Interestingly, the retained CD51+bMSCs retained in the myocardium possessed proliferative potential but only differentiated into endothelial cells, smooth muscle cells, fibroblasts or cardiomyocytes. Transplantation of CD51+bMSCs partially attenuated the inflammatory response in the hearts after MI, while the potential for inflammatory suppression was low in CD51−bMSC-treated mice. Conclusions These findings indicated that the CD51-distinguished subpopulation of bMSCs facilitated proliferation and migration both in vitro and in vivo, which provided a novel cell-based strategy to treat acute MI in mice by intravenous injection.
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Affiliation(s)
- Dong-Mei Xie
- Department of Cardiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China.,NHC Key Laboratory of Assisted Circulation (Sun Yat-sen University), Guangzhou, 510080, China
| | - Yuan-Long Li
- Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, 510080, China
| | - Jie Li
- Department of Cardiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China.,NHC Key Laboratory of Assisted Circulation (Sun Yat-sen University), Guangzhou, 510080, China
| | - Qinglang Li
- Department of Cardiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China.,NHC Key Laboratory of Assisted Circulation (Sun Yat-sen University), Guangzhou, 510080, China
| | - Guihua Lu
- NHC Key Laboratory of Assisted Circulation (Sun Yat-sen University), Guangzhou, 510080, China
| | - Yuansheng Zhai
- Department of Cardiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China.,NHC Key Laboratory of Assisted Circulation (Sun Yat-sen University), Guangzhou, 510080, China
| | - Juhong Zhang
- Department of Cardiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China.,NHC Key Laboratory of Assisted Circulation (Sun Yat-sen University), Guangzhou, 510080, China
| | - Zhibin Huang
- Department of Cardiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China.
| | - Xiuren Gao
- Department of Cardiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China. .,NHC Key Laboratory of Assisted Circulation (Sun Yat-sen University), Guangzhou, 510080, China.
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Saito A, Nagaishi K, Iba K, Mizue Y, Chikenji T, Otani M, Nakano M, Oyama K, Yamashita T, Fujimiya M. Umbilical cord extracts improve osteoporotic abnormalities of bone marrow-derived mesenchymal stem cells and promote their therapeutic effects on ovariectomised rats. Sci Rep 2018; 8:1161. [PMID: 29348535 PMCID: PMC5773568 DOI: 10.1038/s41598-018-19516-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Accepted: 01/04/2018] [Indexed: 02/06/2023] Open
Abstract
Bone marrow-derived mesenchymal stem cells (BM-MSCs) are the most valuable source of autologous cells for transplantation and tissue regeneration to treat osteoporosis. Although BM-MSCs are the primary cells responsible for maintaining bone metabolism and homeostasis, their regenerative ability may be attenuated in postmenopausal osteoporosis patients. Therefore, we first examined potential abnormalities of BM-MSCs in an oestrogen-deficient rat model constructed by ovariectomy (OVX-MSCs). Cell proliferation, mobilisation, and regulation of osteoclasts were downregulated in OVX-MSCs. Moreover, therapeutic effects of OVX-MSCs were decreased in OVX rats. Accordingly, we developed a new activator for BM-MSCs using human umbilical cord extracts, Wharton’s jelly extract supernatant (WJS), which improved cell proliferation, mobilisation and suppressive effects on activated osteoclasts in OVX-MSCs. Bone volume, RANK and TRACP expression of osteoclasts, as well as proinflammatory cytokine expression in bone tissues, were ameliorated by OVX-MSCs activated with WJS (OVX-MSCs-WJ) in OVX rats. Fusion and bone resorption activity of osteoclasts were suppressed in macrophage-induced and primary mouse bone marrow cell-induced osteoclasts via suppression of osteoclast-specific genes, such as Nfatc1, Clcn7, Atp6i and Dc-stamp, by co-culture with OVX-MSCs-WJ in vitro. In this study, we developed a new activator, WJS, which improved the functional abnormalities and therapeutic effects of BM-MSCs on postmenopausal osteoporosis.
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Affiliation(s)
- Akira Saito
- Department of Orthopaedic Surgery, Sapporo Medical University, Sapporo, Japan
| | - Kanna Nagaishi
- Second Department of Anatomy, Sapporo Medical University, Sapporo, Japan. .,Department of Diabetic Cellular Therapeutics, Sapporo Medical University, Sapporo, Japan.
| | - Kousuke Iba
- Department of Orthopaedic Surgery, Sapporo Medical University, Sapporo, Japan
| | - Yuka Mizue
- Second Department of Anatomy, Sapporo Medical University, Sapporo, Japan.,Department of Diabetic Cellular Therapeutics, Sapporo Medical University, Sapporo, Japan
| | - Takako Chikenji
- Second Department of Anatomy, Sapporo Medical University, Sapporo, Japan.,Department of Diabetic Cellular Therapeutics, Sapporo Medical University, Sapporo, Japan
| | - Miho Otani
- Department of Diabetic Cellular Therapeutics, Sapporo Medical University, Sapporo, Japan
| | - Masako Nakano
- Second Department of Anatomy, Sapporo Medical University, Sapporo, Japan
| | - Kazusa Oyama
- Second Department of Anatomy, Sapporo Medical University, Sapporo, Japan
| | - Toshihiko Yamashita
- Department of Orthopaedic Surgery, Sapporo Medical University, Sapporo, Japan
| | - Mineko Fujimiya
- Second Department of Anatomy, Sapporo Medical University, Sapporo, Japan.,Department of Diabetic Cellular Therapeutics, Sapporo Medical University, Sapporo, Japan
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Nagaishi K, Mizue Y, Chikenji T, Otani M, Nakano M, Saijo Y, Tsuchida H, Ishioka S, Nishikawa A, Saito T, Fujimiya M. Umbilical cord extracts improve diabetic abnormalities in bone marrow-derived mesenchymal stem cells and increase their therapeutic effects on diabetic nephropathy. Sci Rep 2017; 7:8484. [PMID: 28814814 PMCID: PMC5559488 DOI: 10.1038/s41598-017-08921-y] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Accepted: 07/20/2017] [Indexed: 01/04/2023] Open
Abstract
Bone marrow-derived mesenchymal stem cells (BM-MSC) has been applied as the most valuable source of autologous cell transplantation for various diseases including diabetic complications. However, hyperglycemia may cause abnormalities in intrinsic BM-MSC which might lose sufficient therapeutic effects in diabetic patients. We demonstrated the functional abnormalities in BM-MSC derived from both type 1 and type 2 diabetes models in vitro, which resulted in loss of therapeutic effects in vivo in diabetic nephropathy (DN). Then, we developed a novel method to improve abnormalities in BM-MSC using human umbilical cord extracts, namely Wharton’s jelly extract supernatant (WJs). WJs is a cocktail of growth factors, extracellular matrixes and exosomes, which ameliorates proliferative capacity, motility, mitochondrial degeneration, endoplasmic reticular functions and exosome secretions in both type 1 and type 2 diabetes-derived BM-MSC (DM-MSC). Exosomes contained in WJs were a key factor for this activation, which exerted similar effects to complete WJs. DM-MSC activated by WJs ameliorated renal injury in both type 1 and type 2 DN. In this study, we developed a novel activating method using WJs to significantly increase the therapeutic effect of BM-MSC, which may allow effective autologous cell transplantation.
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Affiliation(s)
- Kanna Nagaishi
- Second Department of Anatomy, Sapporo Medical University, Sapporo, Japan. .,Department of Diabetic Cellular Therapeutics, Sapporo Medical University, Sapporo, Japan.
| | - Yuka Mizue
- Second Department of Anatomy, Sapporo Medical University, Sapporo, Japan.,Department of Diabetic Cellular Therapeutics, Sapporo Medical University, Sapporo, Japan
| | - Takako Chikenji
- Second Department of Anatomy, Sapporo Medical University, Sapporo, Japan.,Department of Diabetic Cellular Therapeutics, Sapporo Medical University, Sapporo, Japan
| | - Miho Otani
- Department of Diabetic Cellular Therapeutics, Sapporo Medical University, Sapporo, Japan
| | - Masako Nakano
- Second Department of Anatomy, Sapporo Medical University, Sapporo, Japan
| | - Yusaku Saijo
- Second Department of Anatomy, Sapporo Medical University, Sapporo, Japan
| | - Hikaru Tsuchida
- Second Department of Anatomy, Sapporo Medical University, Sapporo, Japan
| | - Shinichi Ishioka
- Department of Obstetrics and Gynecology, Sapporo Medical University, Sapporo, Japan
| | - Akira Nishikawa
- Department of Gynecology and Obstetrics, NTT Sapporo Hospital, Sapporo, Japan
| | - Tsuyoshi Saito
- Department of Obstetrics and Gynecology, Sapporo Medical University, Sapporo, Japan
| | - Mineko Fujimiya
- Second Department of Anatomy, Sapporo Medical University, Sapporo, Japan.,Department of Diabetic Cellular Therapeutics, Sapporo Medical University, Sapporo, Japan
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Hu ZL, Li N, Wei X, Tang L, Wang TH, Chen XM. Neuroprotective effects of BDNF and GDNF in intravitreally transplanted mesenchymal stem cells after optic nerve crush in mice. Int J Ophthalmol 2017; 10:35-42. [PMID: 28149774 DOI: 10.18240/ijo.2017.01.06] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Accepted: 09/04/2016] [Indexed: 02/05/2023] Open
Abstract
AIM To assess the neuro-protective effect of bone marrow mesenchymal stem cells (BMSCs) on retinal ganglion cells (RGCs) following optic nerve crush in mice. METHODS C56BL/6J mice were treated with intravitreal injection of PBS, BMSCs, BDNF-interference BMSCs (BIM), and GDNF-interference BMSCs (GIM) following optic nerve crush, respectively. The number of surviving RGCs was determined by whole-mount retinas and frozen sections, while certain mRNA or protein was detected by q-PCR or ELISA, respectively. RESULTS The density (cell number/mm2) of RGCs was 410.77±56.70 in the retina 21d after optic nerve crush without any treatment, compared to 1351.39±195.97 in the normal control (P<0.05). RGCs in BMSCs treated eyes was 625.07±89.64/mm2, significantly higher than that of no or PBS treatment (P<0.05). While RGCs was even less in the retina with intravitreal injection of BIM (354.07+39.77) and GIM (326.67+33.37) than that without treatment (P<0.05). BMSCs injection improved the internal BDNF expression in retinas. CONCLUSION Optic nerve crush caused rust loss of RGCs and intravitreally transplanted BMSCs at some extent protected RGCs from death. The effect of BMSCs and level of BDNF in retinas are both related to BDNF and GDNF expression in BMSCs.
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Affiliation(s)
- Zong-Li Hu
- Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Ni Li
- Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Xin Wei
- Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Li Tang
- Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Ting-Hua Wang
- Institute of Neurological Disease, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Xiao-Ming Chen
- Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
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Liu Z, Li S, Liu L, Guo Z, Wang P. Internal associations and dynamic expression of c-kit and nanog genes in ventricular remodelling induced by adriamycin. Exp Ther Med 2016; 12:1657-1662. [PMID: 27588087 PMCID: PMC4998031 DOI: 10.3892/etm.2016.3522] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Accepted: 03/15/2016] [Indexed: 12/17/2022] Open
Abstract
The present study aimed to investigate the dynamic expression of the c-kit and nanog genes in rats with left ventricular remodelling induced by adriamycin (ADR), and explore its internal association and mechanism of action. Sprague-Dawley male rats were randomly divided into a normal control group and a heart failure model group. Heart failure was induced by a single intraperitoneal injection of ADR (4 mg/kg) weekly for six weeks. The normal control group was given the same amount of saline. At the eighth week, rat cardiac function was examined to demonstrate the formation of heart failure. The rat hearts were harvested frozen and sectioned, and the expression levels of the nanog and c-kit genes in the myocardial tissue samples were detected using immunohistochemistry, immunofluorescence and reverse transcription-polymerase chain reaction (RT-PCR). Hematoxylin and eosin staining demonstrated various pathological changes in the myocardial cells in the heart failure model group, whereas myocardial infarction was not observed in the normal control group. Immunohistochemistry and immunofluorescence demonstrated that nanog-positive cells were predominantly expressed in the vascular endothelium, with a few myocardial cells and stem cells in normal myocardium. The expression levels of c-kit and nanog in the myocardium of the rats with heart failure decreased significantly. c-kit-positive cells clustered together in the epicardium and its vicinity, and c-kit expression significantly decreased in the myocardium of rats with heart failure, as compared with normal rats. In both groups, some cells co-expressed both the c-kit and nanog genes. The RT-PCR results demonstrated that the expression levels of the two genes in the heart failure model group were significantly lower compared with those in the normal control group (P<0.05). In conclusion, the c-kit- and nanog-positive stem cells decreased in the myocardium of the rats with left ventricular remodelling induced by ADR. Their abnormal expression was significantly correlated with left ventricular remodelling, thereby indicating an internal association (influences of two indexes in the experimental group and control group) between them.
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Affiliation(s)
- Zhen Liu
- Department of Cardiology, Xinxiang Central Hospital, Xinxiang, Henan 453003, P.R. China
| | - Shuo Li
- Department of Cardiology, Xinxiang Central Hospital, Xinxiang, Henan 453003, P.R. China
| | - Lingling Liu
- Department of Cardiology, Xinxiang Central Hospital, Xinxiang, Henan 453003, P.R. China
| | - Zhikun Guo
- Key Laboratory for Medical Tissue Regeneration, Xinxiang Medical University, Xinxiang, Henan 453003, P.R. China
| | - Pengfei Wang
- Department of Cardiology, Xinxiang Central Hospital, Xinxiang, Henan 453003, P.R. China
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Kondo H, Kim HW, Wang L, Okada M, Paul C, Millard RW, Wang Y. Blockade of senescence-associated microRNA-195 in aged skeletal muscle cells facilitates reprogramming to produce induced pluripotent stem cells. Aging Cell 2016; 15:56-66. [PMID: 26637971 PMCID: PMC4717278 DOI: 10.1111/acel.12411] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/09/2015] [Indexed: 12/25/2022] Open
Abstract
The low reprogramming efficiency in cells from elderly patients is a challenge that must be overcome. Recently, it has been reported that senescence‐associated microRNA (miR)‐195 targets Sirtuin 1 (SIRT1) to advance cellular senescence. Thus, we hypothesized that a blockade of miR‐195 expression could improve reprogramming efficiency in old skeletal myoblasts (SkMs). We found that miR‐195 expression was significantly higher in old SkMs (24 months) isolated from C57BL/6 mice as compared to young SkMs (2 months, 2.3‐fold). Expression of SIRT1 and telomerase reverse transcriptase (TERT) was downregulated in old SkMs, and transduction of old SkMs with lentiviral miR‐195 inhibitor significantly restored their expression. Furthermore, quantitative in situ hybridization analysis demonstrated significant telomere elongation in old SkMs transduced with anti‐miR‐195 (1.7‐fold increase). It is important to note that blocking miR‐195 expression markedly increased the reprogramming efficiency of old SkMs as compared to scramble (2.2‐fold increase). Transduction of anti‐miR‐195 did not alter karyotype or pluripotency marker expression. Induced pluripotent stem cells (iPSCs) from old SkMs transduced with anti‐miR‐195 successfully formed embryoid bodies that spontaneously differentiated into three germ layers, indicating that deletion of miR‐195 does not affect pluripotency in transformed SkMs. In conclusion, this study provided novel evidence that the blockade of age‐induced miR‐195 is a promising approach for efficient iPSC generation from aging donor subjects, which has the potential for autologous transplantation of iPSCs in elderly patients.
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Affiliation(s)
- Hideyuki Kondo
- Department of Pathology and Lab Medicine University of Cincinnati 231 Albert Sabin Way Cincinnati OH 45267 USA
| | - Ha Won Kim
- Department of Pathology and Lab Medicine University of Cincinnati 231 Albert Sabin Way Cincinnati OH 45267 USA
| | - Lei Wang
- Department of Pathology and Lab Medicine University of Cincinnati 231 Albert Sabin Way Cincinnati OH 45267 USA
| | - Motoi Okada
- Department of Pathology and Lab Medicine University of Cincinnati 231 Albert Sabin Way Cincinnati OH 45267 USA
| | - Christian Paul
- Department of Pathology and Lab Medicine University of Cincinnati 231 Albert Sabin Way Cincinnati OH 45267 USA
| | - Ronald W. Millard
- Department of Pathology and Lab Medicine University of Cincinnati 231 Albert Sabin Way Cincinnati OH 45267 USA
| | - Yigang Wang
- Department of Pathology and Lab Medicine University of Cincinnati 231 Albert Sabin Way Cincinnati OH 45267 USA
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Okada M, Kim HW, Matsu-ura K, Wang YG, Xu M, Ashraf M. Abrogation of Age-Induced MicroRNA-195 Rejuvenates the Senescent Mesenchymal Stem Cells by Reactivating Telomerase. Stem Cells 2015; 34:148-59. [PMID: 26390028 DOI: 10.1002/stem.2211] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 08/19/2015] [Accepted: 08/24/2015] [Indexed: 12/14/2022]
Abstract
Previously, we reported that a novel subpopulation of young mesenchymal stem cells (YMSCs) existed in old bone marrow, which possessed high antiaging properties as well as excellent efficacy for cardiac repair. MicroRNAs (miRNAs) have emerged as key regulators in post-transcriptional gene expression programs, and however, it is unknown whether miRNAs directly control stem cell senescence. Here we present the first evidence that miR-195 overexpressed in old MSCs (OMSCs) induces stem cell senescence deteriorating their regenerative ability by directly deactivating telomerase reverse transcriptase (Tert), and abrogation of miR-195 can reverse stem cell aging. MiRNAs profiling analysis in YMSCs and OMSCs by microarray showed that miR-140, miR-146a/b, and miR-195 were significantly upregulated in OMSCs, which led us to hypothesize that these are age-induced miRNAs involved in stem cell senescence. Of these miRNAs, we found miR-195 directly targeted 3'-untranslated region of Tert gene by computational target prediction analysis and luciferase assay, and knockdown of miR-195 significantly increased Tert expression in OMSCs. Strikingly, miR-195 inhibition significantly induced telomere relengthening in OMSCs along with reduced expression of senescence-associated β-galactosidase. Moreover, silencing miR-195 in OMSCs by transfection of miR-195 inhibitor significantly restored antiaging factors expression including Tert and Sirt1 as well as phosphorylation of Akt and FOXO1. Notably, abrogation of miR-195 markedly restored proliferative abilities in OMSCs. Transplantation of OMSCs with knocked out miR-195 reduced infarction size and improved LV function. In conclusion, rejuvenation of aged stem cells by miR-195 inhibition would be a promising autologous therapeutic strategy for cardiac repair in the elderly patients.
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Affiliation(s)
- Motoi Okada
- Department of Pathology and Lab of Medicine, University of Cincinnati Medical Center, Cincinnati, Ohio, 45267, USA
| | - Ha Won Kim
- Department of Pathology and Lab of Medicine, University of Cincinnati Medical Center, Cincinnati, Ohio, 45267, USA
| | - Kaoru Matsu-ura
- Department of Pathology and Lab of Medicine, University of Cincinnati Medical Center, Cincinnati, Ohio, 45267, USA
| | - Yi-Gang Wang
- Department of Pathology and Lab of Medicine, University of Cincinnati Medical Center, Cincinnati, Ohio, 45267, USA
| | - Meifeng Xu
- Department of Pathology and Lab of Medicine, University of Cincinnati Medical Center, Cincinnati, Ohio, 45267, USA
| | - Muhammad Ashraf
- Department of Pathology and Lab of Medicine, University of Cincinnati Medical Center, Cincinnati, Ohio, 45267, USA
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