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Marycz K, Wiatrak B, Irwin-Houston JM, Marcinkowska K, Mularczyk M, Bourebaba L. Sex hormone binding globulin (SHBG) modulates mitochondrial dynamics in PPARγ-depleted equine adipose derived stromal cells. J Mol Med (Berl) 2024; 102:1015-1036. [PMID: 38874666 PMCID: PMC11269461 DOI: 10.1007/s00109-024-02459-z] [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: 06/27/2023] [Revised: 03/28/2024] [Accepted: 06/05/2024] [Indexed: 06/15/2024]
Abstract
Peroxisome proliferator-activated receptor gamma (PPARγ) is a transcription factor that promotes adipogenesis, lipid uptake and storage, insulin sensitivity, and glucose metabolism. Hence, defects in PPARγ have been associated to the development of metabolic disorders. Sex hormone-binding globulin (SHBG) is a glycoprotein primarily produced in the liver that regulates the bioavailability of sex hormones. Alike PPARγ, low SHBG levels have been correlated with insulin resistance and associated endocrine abnormalities. Therefore, this study aimed to verify whether SHBG may restore depleted PPARγ functions and thus serve as a new candidate for the management of metabolic conditions. A model of equine adipose-derived stromal cells (EqASCs) has been used, in which a PPARγ silencing and SHBG treatment have been achieved to determine the changes in cell viability, premature senescence, oxidative stress, and mitochondrial functions. Obtained data demonstrated that loss in PPARγ triggers cell apoptosis which is not reversed by SHBG application. Moreover, PPARγ knockdown cells exhibited premature senescence, which has been substantially alleviated by SHBG concomitantly to increased BAX/BCL2 ratio, suggesting a possible effect on senescence-induced apoptosis resistance. Interestingly, PPARγ silencing induced a significant alteration in mitochondrial membrane potential as well as the expression of dynamics and metabolism-related markers. SHBG treatment enabled to ameliorate the transmembrane potential, to normalize the expression levels of key dynamics and metabolism mediators, and to restore the protein levels of PINK, which is critically involved in mitochondria recycling machinery. Presented data suggest that SHBG may provide new mechanistic insights into the regulation of PPARγ functions, and thus offers a preliminary picture on a possible SHBG-PPARγ metabolic crosstalk. KEY MESSAGES : PPARγ is a transcription factor that tightly regulates cell metabolism. Low SHBG levels correlate with insulin resistance and associated endocrine abnormalities. PPARγ silencing reduces cell viability, triggers premature senescence and profound mitochondrial failure in equine ASCs. SHBG protein reverses senescent phenotype and apoptosis resistance of PPARγ- ASCs. SHBG improves mitochondrial dynamics and metabolism following PPARγ knockdown. SHBG might serve as a PPARγ potential mimicking agent for the modulation of ASCs metabolic processes.
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Affiliation(s)
- Krzysztof Marycz
- Department of Experimental Biology, Faculty of Biology and Animal Science, Wrocław University of Environmental and Life Sciences, Norwida 27B, 50-375, Wrocław, Poland
- International Institute of Translational Medicine, Jesionowa 11, Malin, 55-114, Wisznia Mała, Poland
- Department of Medicine and Epidemiology, School of Veterinary Medicine, University of California, Davis, Davis, CA, 95516, USA
| | - Benita Wiatrak
- Department of Experimental Biology, Faculty of Biology and Animal Science, Wrocław University of Environmental and Life Sciences, Norwida 27B, 50-375, Wrocław, Poland
| | - Jennifer M Irwin-Houston
- Department of Experimental Biology, Faculty of Biology and Animal Science, Wrocław University of Environmental and Life Sciences, Norwida 27B, 50-375, Wrocław, Poland
| | - Klaudia Marcinkowska
- Department of Experimental Biology, Faculty of Biology and Animal Science, Wrocław University of Environmental and Life Sciences, Norwida 27B, 50-375, Wrocław, Poland
| | - Malwina Mularczyk
- Department of Experimental Biology, Faculty of Biology and Animal Science, Wrocław University of Environmental and Life Sciences, Norwida 27B, 50-375, Wrocław, Poland
- International Institute of Translational Medicine, Jesionowa 11, Malin, 55-114, Wisznia Mała, Poland
| | - Lynda Bourebaba
- Department of Experimental Biology, Faculty of Biology and Animal Science, Wrocław University of Environmental and Life Sciences, Norwida 27B, 50-375, Wrocław, Poland.
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Ponsuksili S, Siengdee P, Li S, Kriangwanich W, Oster M, Reyer H, Wimmers K. Effect of metabolically divergent pig breeds and tissues on mesenchymal stem cell expression patterns during adipogenesis. BMC Genomics 2024; 25:407. [PMID: 38664635 PMCID: PMC11044395 DOI: 10.1186/s12864-024-10308-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 04/15/2024] [Indexed: 04/29/2024] Open
Abstract
BACKGROUND Unraveling the intricate and tightly regulated process of adipogenesis, involving coordinated activation of transcription factors and signaling pathways, is essential for addressing obesity and related metabolic disorders. The molecular pathways recruited by mesenchymal stem cells (MSCs) during adipogenesis are also dependent on the different sources of the cells and genetic backgrounds of donors, which contribute to the functional heterogeneity of the stem cells and consequently affect the developmental features and fate of the cells. METHODS In this study, the alteration of transcripts during differentiation of synovial mesenchymal stem cells (SMSCs) derived from fibrous synovium (FS) and adipose synovial tissue (FP) of two pig breeds differing in growth performance (German Landrace (DL)) and fat deposition (Angeln Saddleback (AS)) was investigated. SMSCs from both tissues and breeds were stimulated to differentiate into adipocytes in vitro and sampled at four time points (day 1, day 4, day 7 and day 14) to obtain transcriptomic data. RESULTS We observed numerous signaling pathways related to the cell cycle, cell division, cell migration, or cell proliferation during early stages of adipogenesis. As the differentiation process progresses, cells begin to accumulate intracellular lipid droplets and changes in gene expression patterns in particular of adipocyte-specific markers occur. PI3K-Akt signaling and metabolic pathways changed most during adipogenesis, while p53 signaling and ferroptosis were affected late in adipogenesis. When comparing MSCs from FS and FP, only a limited number of differentially expressed genes (DEGs) and enriched signaling pathways were identified. Metabolic pathways, including fat, energy or amino acid metabolism, were highly enriched in the AS breed SMSCs compared to those of the DL breed, especially at day 7 of adipogenesis, suggesting retention of the characteristic metabolic features of their original source, demonstrating donor memory in culture. In contrast, the DL SMSCs were more enriched in immune signaling pathways. CONCLUSIONS Our study has provided important insights into the dynamics of adipogenesis and revealed metabolic shifts in SMSCs associated with different cell sources and genetic backgrounds of donors. This emphasises the critical role of metabolic and genetic factors as important indications and criteria for donor stem cell selection.
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Affiliation(s)
- Siriluck Ponsuksili
- Research Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196, Dummerstorf, Germany.
| | - Puntita Siengdee
- Research Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196, Dummerstorf, Germany
- Program in Applied Biological Sciences: Environmental Health, Chulabhorn Graduate Institute, Kamphaeng Phet 6 Road, Laksi, 10210, Bangkok, Thailand
| | - Shuaichen Li
- Research Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196, Dummerstorf, Germany
| | - Wannapimol Kriangwanich
- Research Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196, Dummerstorf, Germany
- Department of Veterinary Biosciences and Public Health, Faculty of Veterinary Medicine, Chiang Mai University, 50100, Chiang Mai, Thailand
| | - Michael Oster
- Research Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196, Dummerstorf, Germany
| | - Henry Reyer
- Research Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196, Dummerstorf, Germany
| | - Klaus Wimmers
- Research Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196, Dummerstorf, Germany
- Faculty of Agricultural and Environmental Sciences, University Rostock, 18059, Rostock, Germany
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Qin H, Niu Y, Luan H, Li M, Zheng L, Pan Y, Liu W. Effects of legacy and emerging per- and polyfluoroalkyl substances on PPARα/β/γ regulation and osteogenic/adipogenic differentiation. ENVIRONMENT INTERNATIONAL 2022; 170:107584. [PMID: 36265359 DOI: 10.1016/j.envint.2022.107584] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 09/24/2022] [Accepted: 10/11/2022] [Indexed: 06/16/2023]
Abstract
As the primary molecular target, there is still a gap between the peroxisome proliferator-activated receptors (PPARs) regulation and the adverse health effects caused by per- and polyfluoroalkyl substances (PFASs). The effects of PFASs on cellular differentiation regulated by PPARs is likely significant given the association of PFASs exposure with obesity and decreased bone density. Human mesenchymal stem cells (hMSCs) were used as an in vitro model to assess the roles of PPAR subtypes in the multipotent differentiation of hMSCs affected by perfluorooctanesulfonate (PFOS), perfluorooctanoic acid (PFOA) and their replacement compounds. PFASs increased the expression of three PPAR subtypes in proliferating and differentiating hMSCs. Meanwhile, PFOS and PFOA decreased osteogenesis, enhanced adipogenesis, and increased bone turnover in hMSCs. Similarly, PFOA alternatives, hexafluoropropylene oxide dimer acid (HFPO-DA) and hexafluoropropylene oxide trimer acid (HFPO-TA), exhibited similar or even higher potency in affecting stem cell differentiation compared with PFOA. Perfluorohexanesulfonate (PFHxS) inhibited osteogenesis with comparable potency to PFOS. In contrast, 6:2 chlorinated poly-fluoroalkyl ether sulfonate (6:2Cl-PFESA) enhanced osteogenesis. PPARβ expression is significantly positively correlated with osteogenesis and osteoprotegerin (OPG) secretion in 6:2Cl-PFESA treated cells. shRNA knockdown of PPARβ remarkably reversed the osteogenic effects of 6:2Cl-PFESA and enhanced the adipogenic effects of the six chemicals. The results suggested that the adverse effects and relative potency of PFASs on the multipotent differentiation of hMSCs were dependent on the integrated action of the three PPAR subtypes, which facilitates a better understanding of the molecular initiating events of PFASs. The present study may well explain the mechanism of the decreased bone density and increased obesity incidence among those exposed to legacy PFASs, and indicates the necessity of further health risk assessment for the alternatives.
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Affiliation(s)
- Hui Qin
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Yuxin Niu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Haiyang Luan
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Minghan Li
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Lu Zheng
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Yifan Pan
- College of Life Sciences, Hebei University, Baoding 071002, China
| | - Wei Liu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
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Wu Z, Liu L. The protective activity of genistein against bone and cartilage diseases. Front Pharmacol 2022; 13:1016981. [PMID: 36160403 PMCID: PMC9492956 DOI: 10.3389/fphar.2022.1016981] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 08/25/2022] [Indexed: 11/13/2022] Open
Abstract
Genistein, a natural isoflavone rich in soybean and leguminous plants, has been shown various biological effects, such as anti-inflammation, anti-oxidation, anti-cancer, and bone/cartilage protection. Due to the structural similarity to estrogen, genistein exhibits estrogen-like activity in protecting against osteoporosis and osteoarthritis. Furthermore, genistein has been considered as an inhibitor of tyrosine kinase, which has been found to be dysregulated in the pathological development of osteoporosis, osteoarthritis, and intervertebral disc degeneration (IDD). Many signaling pathways, such as MAPK, NF-κB, and NRF2/HO-1, are involved in the regulatory activity of genistein in protecting against bone and cartilage diseases. The potential molecular mechanisms of genistein in therapeutic management of bone and cartilage diseases have been investigated, but remain to be fully understood. In this article, we mainly discuss the current knowledge of genistein in protecting against bone and cartilage diseases, such as osteoporosis, osteoarthritis, rheumatoid arthritis (RA), and IDD.
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Affiliation(s)
- Zhenyu Wu
- First Affiliated Hospital of Gannan Medical University, Ganzhou, China
- First Clinical Medical College of Gannan Medical University, Ganzhou, China
- *Correspondence: Zhenyu Wu,
| | - Luying Liu
- First Clinical Medical College of Gannan Medical University, Ganzhou, China
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Guillemet D, Belles C, Gomes A, Azalbert V, André M, Faresse N, Burcelin R, Lagarde JM, Lacasa D, Kéophiphath M. Screening for anti-adipogenic, pro-lipolytic and thermogenic plant extracts by models associating intestinal epithelial cells with human adipose cells. Eur J Nutr 2022; 61:2201-2215. [PMID: 35092460 PMCID: PMC9106611 DOI: 10.1007/s00394-021-02794-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 12/21/2021] [Indexed: 12/17/2022]
Abstract
Purpose Excessive fat mass accumulation in obesity leads to diverse metabolic disorders, increased risks of cardiovascular diseases and in some cases, mortality. The aim of this study was to screen the actions of botanical extracts intended for oral use on human adipose tissue, using an in vitro screening model combining human intestinal cells with human adipose cells. This was to find the most effective extracts on lipid accumulation, UCP1 expression and ATP production in pre-adipocytes and on adipocyte lipolysis. Methods In this study, 25 individual plant extracts were screened for their effects on human adipose cells. Consequently, an original in vitro model was set up using the Caco-2 cell line, to mimic the intestinal passage of the extracts and then exposing human adipose cells to them. The biological actions of extracts were thus characterized, and compared with a coffee extract standard. The most effective extracts, and their combinations, were retained for their actions on lipid accumulation, the expression of the thermogenic effector UCP1 and ATP production in pre-adipocytes as well as on lipolysis activity of mature adipocytes. Results The biphasic culture system combining human Caco-2 cells with human adipose cells was verified as functional using the green coffee extract standard. Out of the 25 plant extracts studied, only 7 and their combinations were retained due to their potent effects on adipose cells biology. The data showed that compared to the coffee extract standard, Immortelle, Catechu, Carrot and Rose hip extracts were the most effective in reducing lipid accumulation and increased UCP1 expression in human pre-adipocytes. Conclusion This study reveals the potential inhibitory effects on lipid accumulation and thermogenic activity of Immortelle, Catechu, Carrot and Rose hip extracts, and for the first time synergies in their combinations, using an in vitro model mimicking as closely as possible, human intestinal passage linked to adipose cells. These findings need to be confirmed by in vivo trials. Supplementary Information The online version contains supplementary material available at 10.1007/s00394-021-02794-8.
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Affiliation(s)
| | - Chloé Belles
- Centre Pierre Potier, D.I.V.A. Expertise, 1 place Pierre Potier, 31100, Toulouse, France
| | - Aurélie Gomes
- Centre Pierre Potier, Imactiv 3D, 1 place Pierre Potier, 31100, Toulouse, France
| | - Vincent Azalbert
- Institute of Cardiovascular and Metabolic Diseases, 1 avenue du Professeur Jean Poulhès, 31432, Toulouse, France
| | - Mathilde André
- Centre Pierre Potier, D.I.V.A. Expertise, 1 place Pierre Potier, 31100, Toulouse, France
| | - Nourdine Faresse
- Centre Pierre Potier, D.I.V.A. Expertise, 1 place Pierre Potier, 31100, Toulouse, France
| | - Rémy Burcelin
- Institute of Cardiovascular and Metabolic Diseases, 1 avenue du Professeur Jean Poulhès, 31432, Toulouse, France
| | - Jean-Michel Lagarde
- Centre Pierre Potier, Imactiv 3D, 1 place Pierre Potier, 31100, Toulouse, France
| | - Danièle Lacasa
- Centre Pierre Potier, D.I.V.A. Expertise, 1 place Pierre Potier, 31100, Toulouse, France
| | - Mayoura Kéophiphath
- Centre Pierre Potier, D.I.V.A. Expertise, 1 place Pierre Potier, 31100, Toulouse, France.
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Cheng C, Zhang H, Zheng J, Jin Y, Wang D, Dai Z. METTL14 benefits the mesenchymal stem cells in patients with steroid-associated osteonecrosis of the femoral head by regulating the m6A level of PTPN6. Aging (Albany NY) 2021; 13:25903-25919. [PMID: 34910686 PMCID: PMC8751613 DOI: 10.18632/aging.203778] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 11/22/2021] [Indexed: 12/16/2022]
Abstract
Imbalanced osteogenic/adipogenic differentiation of bone marrow mesenchymal stem cells (BMSCs) is considered the core pathological characteristic of steroid-associated osteonecrosis of the femoral head (SONFH). N6-Methyladenosine (m6A) is the most common type of RNA modification in eukaryotic cells and participates in various physiological and pathological processes. However, the relationship between m6A modification and SONFH has not been reported. In the present study, we aimed to explore the roles of m6A modifications and methyltransferase METTL14 in SONFH. Our results showed that the m6A levels were down-regulated in femoral head tissues and BMSCs from SONFH patients, and this effect was attributed to the reduction of METTL14. Furthermore, METTL14 overexpression in BMSCs from SONFH patients enhanced cell proliferation and osteogenic differentiation. We further identified PTPN6 as the downstream target of METTL14 by mRNA sequencing. Mechanistically, METTL14 regulated PTPN6 expression by increasing PTPN6 mRNA stability in an m6A-dependent manner. Moreover, PTPN6 knockdown abrogated the beneficial effects of METTL14 overexpression on BMSCs. Additionally, we found that METTL14 activated the Wnt signaling pathway, and this effect was caused by the interaction of PTPN6 and GSK-3β. In conclusion, we elucidated the functional roles of METTL14 and m6A methylation in SONFH BMSCs and identified a novel RNA regulatory mechanism, providing a potential therapeutic target for SONFH.
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Affiliation(s)
- Cheng Cheng
- Department of Orthopedics, Henan Provincial People's Hospital, Zhengzhou, Henan, China
| | - Haoping Zhang
- Department of Mini-invasive Spinal Surgery, Third Hospital of Henan Province, Zhengzhou, Henan, China
| | - Jia Zheng
- Department of Orthopedics, Henan Provincial People's Hospital, Zhengzhou, Henan, China
| | - Yi Jin
- Department of Orthopedics, Henan Provincial People's Hospital, Zhengzhou, Henan, China
| | - Donghui Wang
- Department of Orthopedics, Henan Provincial People's Hospital, Zhengzhou, Henan, China
| | - Zhipeng Dai
- Department of Orthopedics, Henan Provincial People's Hospital, Zhengzhou, Henan, China
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Balera Brito VG, Patrocinio MS, Alves Barreto AE, Tfaile Frasnelli SC, Lara VS, Santos CF, Penha Oliveira SH. Telmisartan impairs the in vitro osteogenic differentiation of mesenchymal stromal cells from spontaneously hypertensive male rats. Eur J Pharmacol 2021; 912:174609. [PMID: 34743978 DOI: 10.1016/j.ejphar.2021.174609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 10/20/2021] [Accepted: 10/26/2021] [Indexed: 11/19/2022]
Abstract
Telmisartan (TELM) is an angiotensin II (Ang II) type 1 receptor (Agtr1) antagonist, with partial agonism for Pparg, and has been shown to affect bone metabolism. Therefore, the aim of this study was to investigate the effects of TELM in the in vitro osteogenic differentiation of bone marrow-derived mesenchymal stromal cells (BMSC) from spontaneously hypertensive rats (SHRs). BMSC were obtained from male SHR, and the osteogenic medium (OM) was added to the cells concomitantly with TELM (0.005, 0.05, and 0.5 μM). Undifferentiated BMSC, in control medium (CM), showed an increased viability, while the addition of OM reduced this parameter, and TELM did not show cytotoxicity in the concentrations used. BMSC in OM had an alkaline phosphatase (ALP) activity peak at d10, which decreased at d14 and d21, and TELM reduced ALP at d10 in a dose-dependent manner. Mineralization was observed in the OM at d14, which intensified at d21, but was inhibited by TELM. Agtr1b was increased in the OM, and TELM inhibited its expression. TELM reduced Opn, Ocn, and Bsp and increased Pparg expression, and at the higher concentration TELM also increased the expression of adipogenic markers, Fabp4 and Adipoq. In addition, TELM 0.5 μM increased Irs1 and Glut4, insulin and glucose metabolism markers, known to be regulated by Pparg and to be related to adipogenic phenotype. Our data shows that TELM inhibited the osteogenic differentiation and mineralization of SHR BMSC, by favoring an adipogenic prone phenotype due to Pparg upregulation.
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Affiliation(s)
- Victor Gustavo Balera Brito
- Department of Basic Sciences, São Paulo State University (UNESP), School of Dentistry, Araçatuba, SP, Brazil; Multicenter Postgraduate Program in Physiological Sciences, Brazilian Society of Physiology, São Paulo State University (UNESP), School of Dentistry, Araçatuba, SP, Brazil
| | - Mariana Sousa Patrocinio
- Department of Basic Sciences, São Paulo State University (UNESP), School of Dentistry, Araçatuba, SP, Brazil
| | - Ayná Emanuelli Alves Barreto
- Department of Basic Sciences, São Paulo State University (UNESP), School of Dentistry, Araçatuba, SP, Brazil; Multicenter Postgraduate Program in Physiological Sciences, Brazilian Society of Physiology, São Paulo State University (UNESP), School of Dentistry, Araçatuba, SP, Brazil
| | | | - Vanessa Soares Lara
- Department of Stomatology, Bauru School of Dentistry, University of São Paulo (USP), SP, Brazil
| | - Carlos Ferreira Santos
- Department of Biological Science, Bauru School of Dentistry, University of São Paulo (USP), SP, Brazil
| | - Sandra Helena Penha Oliveira
- Department of Basic Sciences, São Paulo State University (UNESP), School of Dentistry, Araçatuba, SP, Brazil; Multicenter Postgraduate Program in Physiological Sciences, Brazilian Society of Physiology, São Paulo State University (UNESP), School of Dentistry, Araçatuba, SP, Brazil.
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Qin A, Chen S, Wang P, Huang X, Zhang Y, Liang L, Du LR, Lai DH, Ding L, Yu X, Xiang AP. Knockout of NOS2 Promotes Adipogenic Differentiation of Rat MSCs by Enhancing Activation of JAK/STAT3 Signaling. Front Cell Dev Biol 2021; 9:638518. [PMID: 33816486 PMCID: PMC8017136 DOI: 10.3389/fcell.2021.638518] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 02/08/2021] [Indexed: 12/14/2022] Open
Abstract
Mesenchymal stromal cells (MSCs) are a heterogeneous population of cells that possess multilineage differentiation potential and extensive immunomodulatory properties. In mice and rats, MSCs produce nitric oxide (NO), as immunomodulatory effector molecule that exerts an antiproliferative effect on T cells, while the role of NO in differentiation was less clear. Here, we investigated the role of NO synthase 2 (NOS2) on adipogenic and osteogenic differentiation of rat MSCs. MSCs isolated from NOS2-null (NOS2–/–) and wild type (WT) Sprague–Dawley (SD) rats exhibited homogenous fibroblast-like morphology and characteristic phenotypes. However, after induction, adipogenic differentiation was found significantly promoted in NOS2–/– MSCs compared to WT MSCs, but not in osteogenic differentiation. Accordingly, qRT-PCR revealed that the adipogenesis-related genes PPAR-γ, C/EBP-α, LPL and FABP4 were markedly upregulated in NOS2–/– MSCs, but not for osteogenic transcription factors or marker genes. Further investigations revealed that the significant enhancement of adipogenic differentiation in NOS2–/– MSCs was due to overactivation of the STAT3 signaling pathway. Both AG490 and S3I-201, small molecule inhibitors that selectively inhibit STAT3 activation, reversed this adipogenic effect. Furthermore, after high-fat diet (HFD) feeding, knockout of NOS2 in rat MSCs resulted in significant obesity. In summary, NOS2 is involved in the regulation of rat MSC adipogenic differentiation via the STAT3 signaling pathway.
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Affiliation(s)
- Aiping Qin
- Key Laboratory of Molecular Target and Clinical Pharmacology, State Key Laboratory of Respiratory Disease, The Fifth Affiliated Hospital, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, China.,Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Sheng Chen
- Key Laboratory of Molecular Target and Clinical Pharmacology, State Key Laboratory of Respiratory Disease, The Fifth Affiliated Hospital, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, China
| | - Ping Wang
- Key Laboratory of Molecular Target and Clinical Pharmacology, State Key Laboratory of Respiratory Disease, The Fifth Affiliated Hospital, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, China
| | - Xiaotao Huang
- Key Laboratory of Molecular Target and Clinical Pharmacology, State Key Laboratory of Respiratory Disease, The Fifth Affiliated Hospital, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, China
| | - Yu Zhang
- Key Laboratory of Molecular Target and Clinical Pharmacology, State Key Laboratory of Respiratory Disease, The Fifth Affiliated Hospital, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, China
| | - Lu Liang
- Key Laboratory of Molecular Target and Clinical Pharmacology, State Key Laboratory of Respiratory Disease, The Fifth Affiliated Hospital, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, China
| | - Ling-Ran Du
- Key Laboratory of Molecular Target and Clinical Pharmacology, State Key Laboratory of Respiratory Disease, The Fifth Affiliated Hospital, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, China
| | - De-Hua Lai
- Center for Parasitic Organisms, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Li Ding
- Department of Pathology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Xiyong Yu
- Key Laboratory of Molecular Target and Clinical Pharmacology, State Key Laboratory of Respiratory Disease, The Fifth Affiliated Hospital, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, China
| | - Andy Peng Xiang
- Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-sen University, Guangzhou, China
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Shim KS, Hwang YH, Jang SA, Kim T, Ha H. Ethanol Extract of Amomum tsao-ko Ameliorates Ovariectomy-Induced Trabecular Loss and Fat Accumulation. Molecules 2021; 26:molecules26040784. [PMID: 33546367 PMCID: PMC7913548 DOI: 10.3390/molecules26040784] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/22/2021] [Accepted: 01/29/2021] [Indexed: 02/07/2023] Open
Abstract
In Asia, Amomum tsao-ko has long been used as a spice or seasoning in food to stimulate digestion. In the present study, we evaluated the effects of ethanol extract of Amomum tsao-ko (EEAT) on menopausal osteoporosis and obesity. After the administration of EEAT in ovariectomy (OVX) mice models for five weeks, microcomputed tomography and a histological analysis were performed to assess, respectively, the trabecular structure and the fat accumulation in adipose, liver, and bone tissues. We also examined the effects of EEAT on a bone marrow macrophage model of osteoclastogenesis by in vitro stimulation from the receptor activator of nuclear factor-kappa Β ligand (RANKL) through real-time PCR and Western blot analysis. In addition, ultrahigh performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) with authentic standards was applied to characterize the phytochemical profiling of EEAT. We found that EEAT significantly decreased OVX-induced body weight gain and fat accumulation, significantly prevented OVX-induced deterioration of bone mineral density and microstructure of trabecular tissues, and significantly inhibited osteoclast differentiation by downregulating NF-κB/Fos/NFATc1 signaling in osteoclasts. Furthermore, UHPLC-MS/MS identified eight beneficial phytochemicals in EEAT. Collectively, these results suggest that EEAT might be an effective nutraceutical candidate to attenuate menopausal osteoporosis by inhibiting osteoclastogenesis and to prevent obesity by suppressing fat accumulation.
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Affiliation(s)
- Ki-Shuk Shim
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Yuseong-daero 1672, Yuseong-gu, Daejeon 34054, Korea; (K.-S.S.); (Y.-H.H.); (S.-A.J.); (T.K.)
| | - Youn-Hwan Hwang
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Yuseong-daero 1672, Yuseong-gu, Daejeon 34054, Korea; (K.-S.S.); (Y.-H.H.); (S.-A.J.); (T.K.)
- University of Science & Technology (UST), Korean Convergence Medicine Major KIOM, 1672 Yuseongdae-ro, Yuseong-gu, Daejeon 34054, Korea
| | - Seon-A Jang
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Yuseong-daero 1672, Yuseong-gu, Daejeon 34054, Korea; (K.-S.S.); (Y.-H.H.); (S.-A.J.); (T.K.)
| | - Taesoo Kim
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Yuseong-daero 1672, Yuseong-gu, Daejeon 34054, Korea; (K.-S.S.); (Y.-H.H.); (S.-A.J.); (T.K.)
| | - Hyunil Ha
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Yuseong-daero 1672, Yuseong-gu, Daejeon 34054, Korea; (K.-S.S.); (Y.-H.H.); (S.-A.J.); (T.K.)
- Correspondence: ; Tel.: +82-42-868-9367
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10
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Cao J, Ding K, Pan G, Rosario R, Su Y, Bao Y, Zhou H, Xu J, McGee Lawrence ME, Hamrick MW, Isales CM, Shi X. Deletion of PPARγ in Mesenchymal Lineage Cells Protects Against Aging-Induced Cortical Bone Loss in Mice. J Gerontol A Biol Sci Med Sci 2021; 75:826-834. [PMID: 32060555 DOI: 10.1093/gerona/glaa049] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Indexed: 02/06/2023] Open
Abstract
Bone loss in aging is linked with chronic low-grade inflammation and the accumulation of marrowfat in animals and humans. Peroxisome proliferator-activated receptor gamma (PPARγ), an adipogenic regulator, plays key roles in these biological processes. However, studies of the roles of PPARγ in age-related bone loss and inflammation are lacking. We hypothesized that deletion of PPARγ in bone marrow mesenchymal lineage cells would reduce bone loss with aging, potentially through a reduction in fat-generated inflammatory responses and an increase in osteoblastic activity. In the present study, we show that mice deficient of PPARγ in Dermo1-expressing mesenchymal lineage cells (Dermo1-Cre:PPARγ fl/fl) have reduced fat mass and increased cortical bone thickness but that deficiency of PPARγ had limited effect on protection of trabecular bone with aging as demonstrated by dual-energy X-ray absorptiometry, µCT, and histomorphometric analyses. Conditional knockout of PPARγ reduced serum concentrations of adipokines, including adiponectin, resistin, and leptin, and reduced marrow stromal cell expression levels of inflammation-related genes. Inflammation genes involved in the interferon signaling pathway were reduced the most. These results demonstrate that disruption of the master adipogenic regulator, PPARγ, has a certain protective effect on aging-induced bone loss, suggesting that regulation of adipose function and modulation of interferon signaling are among the key mechanisms by which PPARγ regulates bone homeostasis during aging process.
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Affiliation(s)
- Jay Cao
- USDA-ARS Grand Forks Human Nutrition Research Center, Grand Forks, North Dakota
| | - Kehong Ding
- Center for Healthy Aging, Augusta University, Georgia.,Department of Neuroscience and Regenerative Medicine, Augusta University, Georgia
| | - Guodong Pan
- Department of Neuroscience and Regenerative Medicine, Augusta University, Georgia
| | - Raysa Rosario
- Department of Neuroscience and Regenerative Medicine, Augusta University, Georgia
| | - Yun Su
- Center for Healthy Aging, Augusta University, Georgia.,Department of Neuroscience and Regenerative Medicine, Augusta University, Georgia
| | - Yonggang Bao
- Department of Neuroscience and Regenerative Medicine, Augusta University, Georgia
| | - Hongyan Zhou
- Department of Neuroscience and Regenerative Medicine, Augusta University, Georgia
| | - Jianru Xu
- Center for Healthy Aging, Augusta University, Georgia.,Department of Neuroscience and Regenerative Medicine, Augusta University, Georgia
| | - Meghan E McGee Lawrence
- Center for Healthy Aging, Augusta University, Georgia.,Department of Cell Biology and Anatomy, Augusta University, Georgia
| | - Mark W Hamrick
- Center for Healthy Aging, Augusta University, Georgia.,Department of Cell Biology and Anatomy, Augusta University, Georgia
| | - Carlos M Isales
- Center for Healthy Aging, Augusta University, Georgia.,Department of Neuroscience and Regenerative Medicine, Augusta University, Georgia.,Department of Medicine, Augusta University, Georgia
| | - Xingming Shi
- Center for Healthy Aging, Augusta University, Georgia.,Department of Neuroscience and Regenerative Medicine, Augusta University, Georgia.,Department of Medicine, Augusta University, Georgia
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11
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Hongfang G, Khan R, Raza SHA, Nurgulsim K, Suhail SM, Rahman A, Ahmed I, Ijaz A, Ahmad I, Linsen Z. Transcriptional regulation of adipogenic marker genes for the improvement of intramuscular fat in Qinchuan beef cattle. Anim Biotechnol 2020; 33:776-795. [PMID: 33151113 DOI: 10.1080/10495398.2020.1837847] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The intramuscular fat content plays a crucial role in meat quality traits. Increasing the degree of adipogenesis in beef cattle leads to an increase in the content of intramuscular fat. Adipogenesis a complex biochemical process which is under firm genetic control. Over the last three decades, the Qinchuan beef cattle have been extensively studied for the improvement of meat production and quality traits. In this study, we reviewed the literature regarding adipogenesis and intramuscular fat deposition. Then, we summarized the research conducted on the transcriptional regulation of key adipogenic marker genes, and also reviewed the roles of adipogenic marker genes in adipogenesis of Qinchuan beef cattle. This review will elaborate our understanding regarding transcriptional regulation which is a vital physiological process regulated by a cascade of transcription factors (TFs), key target marker genes, and regulatory proteins. This synergistic action of TFs and target genes ensures the accurate and diverse transmission of the genetic information for the accomplishment of central physiological processes. This information will provide an insight into the transcriptional regulation of the adipogenic marker genes and its role in bovine adipogenesis for the breed improvement programs especially for the trait of intramuscular fat deposition.
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Affiliation(s)
- Guo Hongfang
- Medical College of Xuchang University, Xuchang City, Henan Province, P. R. China
| | - Rajwali Khan
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P. R. China.,Department of Livestock Management, Breeding and Genetics, The University of Agriculture, Peshawar, Pakistan
| | - Sayed Haidar Abbas Raza
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P. R. China
| | - Kaster Nurgulsim
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P. R. China
| | - Syed Muhammad Suhail
- Department of Livestock Management, Breeding and Genetics, The University of Agriculture, Peshawar, Pakistan
| | - Abdur Rahman
- Department of Livestock Management, Breeding and Genetics, The University of Agriculture, Peshawar, Pakistan
| | - Ijaz Ahmed
- Department of Livestock Management, Breeding and Genetics, The University of Agriculture, Peshawar, Pakistan
| | - Asim Ijaz
- Department of Livestock Management, Breeding and Genetics, The University of Agriculture, Peshawar, Pakistan
| | - Iftikhar Ahmad
- Department of Livestock Management, Breeding and Genetics, The University of Agriculture, Peshawar, Pakistan
| | - Zan Linsen
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, P. R. China
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12
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Influence of the TGF-β Superfamily on Osteoclasts/Osteoblasts Balance in Physiological and Pathological Bone Conditions. Int J Mol Sci 2020; 21:ijms21207597. [PMID: 33066607 PMCID: PMC7589189 DOI: 10.3390/ijms21207597] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 10/09/2020] [Accepted: 10/10/2020] [Indexed: 12/19/2022] Open
Abstract
The balance between bone forming cells (osteoblasts/osteocytes) and bone resorbing cells (osteoclasts) plays a crucial role in tissue homeostasis and bone repair. Several hormones, cytokines, and growth factors-in particular the members of the TGF-β superfamily such as the bone morphogenetic proteins-not only regulate the proliferation, differentiation, and functioning of these cells, but also coordinate the communication between them to ensure an appropriate response. Therefore, this review focuses on TGF-β superfamily and its influence on bone formation and repair, through the regulation of osteoclastogenesis, osteogenic differentiation of stem cells, and osteoblasts/osteoclasts balance. After introducing the main types of bone cells, their differentiation and cooperation during bone remodeling and fracture healing processes are discussed. Then, the TGF-β superfamily, its signaling via canonical and non-canonical pathways, as well as its regulation by Wnt/Notch or microRNAs are described and discussed. Its important role in bone homeostasis, repair, or disease is also highlighted. Finally, the clinical therapeutic uses of members of the TGF-β superfamily and their associated complications are debated.
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13
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Han S, Kim J, Lee G, Kim D. Mechanical Properties of Materials for Stem Cell Differentiation. ACTA ACUST UNITED AC 2020; 4:e2000247. [DOI: 10.1002/adbi.202000247] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 09/28/2020] [Indexed: 12/16/2022]
Affiliation(s)
- Seong‐Beom Han
- KU‐KIST Graduate School of Converging Science and Technology Korea University 145, Anam‐ro, Seongbuk‐gu Seoul 02841 Republic of Korea
| | - Jeong‐Ki Kim
- KU‐KIST Graduate School of Converging Science and Technology Korea University 145, Anam‐ro, Seongbuk‐gu Seoul 02841 Republic of Korea
| | - Geonhui Lee
- KU‐KIST Graduate School of Converging Science and Technology Korea University 145, Anam‐ro, Seongbuk‐gu Seoul 02841 Republic of Korea
| | - Dong‐Hwee Kim
- KU‐KIST Graduate School of Converging Science and Technology Korea University 145, Anam‐ro, Seongbuk‐gu Seoul 02841 Republic of Korea
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14
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Wu F, Huang W, Yang Y, Liu F, Chen J, Wang G, Sun Z. miR-155-5p regulates mesenchymal stem cell osteogenesis and proliferation by targeting GSK3B in steroid-associated osteonecrosis. Cell Biol Int 2020; 45:83-91. [PMID: 32991030 DOI: 10.1002/cbin.11470] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 09/14/2020] [Accepted: 09/26/2020] [Indexed: 01/31/2023]
Abstract
microRNAs (miRNAs) have recently been recognized as playing an important role in bone-associated diseases. This study investigated whether the reduced miR-155-5p in steroid-associated osteonecrosis of the femoral head (ONFH) attenuated osteogenic differentiation and cell proliferation by targeting GSK3B. Bone marrow was collected from the proximal femurs of patients with steroid-associated ONFH (n = 10) and patients with new femoral neck fracture (n = 10) and mesenchymal stem cells (MSCs) were isolated. The expression profile, the biological function of miR-155-5p, and the interaction between miR-155-5p and GSK3B were investigated by cell viability measurement, western blot, real-time polymerase chain reaction, luciferase reporter assay, and Alizarin Red S (ARS) staining of MSCs. The MSCs that were obtained from the femoral neck fracture group and from the steroid-associated ONFH group were transfected with or without miR-155-5p. We found that, in ONFH samples, the level of mature miR-155-5p was significantly lower than that of control samples. By inhibiting GSK3B, miR-155-5p promoted the nuclear translocation of β-catenin, increased the expression of osteogenesis-related genes, and facilitated the proliferation and differentiation of MSCs. Restoring the expression of GSK3B in MSCs partially reversed the effect of miR-155-5p. These findings suggest that reduced miR-155-5p in steroid-associated ONFH attenuates osteogenic differentiation and cell proliferation by increased levels of GSK3B and inhibition of Wnt signaling.
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Affiliation(s)
- Fei Wu
- Department of Orthopedics, Renmin Hospital, Wuhan University, Wuhan, Hubei, China
| | - Wei Huang
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Yue Yang
- Department of Orthopedics, Renmin Hospital, Wuhan University, Wuhan, Hubei, China
| | - Feng Liu
- Department of Orthopedics, Renmin Hospital, Wuhan University, Wuhan, Hubei, China
| | - Jin Chen
- Department of Orthopedics, Yiling Hospital, Yichang, Hubei, China
| | - Guangyong Wang
- Department of Orthopedics, Yiling Hospital, Yichang, Hubei, China
| | - Zhibo Sun
- Department of Orthopedics, Renmin Hospital, Wuhan University, Wuhan, Hubei, China
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15
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Hu Y, Wang C, Ha S, Zhu N, Cao Z, Song Y. Peroxisome proliferator activated receptor γ promotes mineralization and differentiation in cementoblasts via inhibiting Wnt/β-catenin signaling pathway. J Cell Biochem 2020; 121:3700-3710. [PMID: 31709625 DOI: 10.1002/jcb.29509] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 10/10/2019] [Indexed: 01/24/2023]
Abstract
Peroxisome proliferator activated receptor γ (PPARγ) is a member of the nuclear receptor family of transcription factors, which involved in inflammation regulating and bone remodeling. Rare studies explored the effects of PPARγ on mineralization and differentiation in cementoblasts. To explore the potential approaches to repair the damaged periodontal tissues especially for cementum, the present study aims to investigate the effects and the regulating mechanism of PPARγ on mineralization and differentiation in cementoblasts. Murine cementoblast cell lines (OCCM-30) were cultured in basic medium for 24 hours/48 hours or in mineralization medium for 3/7/10 days, respectively at addition of dimethyl sulphoxide, rosiglitazone (PPARγ agonist), GW9662 (PPARγ antagonist), lithium chloride (LiCl), tumor necrosis factor-α (TNF-α), or respective combination. Expression of mineralization genes alkaline phosphatase (ALP), runt related transcription factors 2 (RUNX2), and osteocalcin (OCN) were detected by quantitative real-time polymerase chain reaction or/and Western blot. ALP staining and alizarin red staining were used to evaluate the mineralization in OCCM-30 cells. The change of β-catenin expression and translocation in cytoplasm/nucleus was analyzed by Western blot and immunofluorescence. The results showed that PPARγ agonist rosiglitazone improved the expression of ALP, RUNX2, and OCN, deepened ALP staining, increased mineralized nodules formation, and decreased β-catenin expression in the nucleus. LiCl, an activator of the Wnt signaling pathway, inhibited the expression of mineralization genes and reversed the upregulated expression of mineralization genes resulted from rosiglitazone. Under inflammatory microenvironment, rosiglitazone not only suppressed the expression of interleukin-1β caused by TNF-α, but improved the expression of mineralization genes in OCCM-30 cells. In conclusion, PPARγ could promote mineralization and differentiation in cementoblasts via inhibiting the Wnt/β-catenin signaling pathway, which would shed new light on the treatment of periodontitis and periodontal tissue regeneration.
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Affiliation(s)
- Yingying Hu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory for Oral Biomedicine Ministry of Education, Wuhan University, Wuhan, Hubei, China
| | - Changning Wang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory for Oral Biomedicine Ministry of Education, Wuhan University, Wuhan, Hubei, China
| | - Shanshan Ha
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory for Oral Biomedicine Ministry of Education, Wuhan University, Wuhan, Hubei, China
| | - Ningjing Zhu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory for Oral Biomedicine Ministry of Education, Wuhan University, Wuhan, Hubei, China
| | - Zhengguo Cao
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory for Oral Biomedicine Ministry of Education, Wuhan University, Wuhan, Hubei, China
| | - Yaling Song
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory for Oral Biomedicine Ministry of Education, Wuhan University, Wuhan, Hubei, China
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16
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Sun Z, Wu F, Yang Y, Liu F, Mo F, Chen J, Wang G, Zhang B. MiR-144-3p Inhibits BMSC Proliferation and Osteogenic Differentiation Via Targeting FZD4 in Steroid-Associated Osteonecrosis. Curr Pharm Des 2020; 25:4806-4812. [PMID: 31566128 DOI: 10.2174/1381612825666190930094019] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Accepted: 09/26/2019] [Indexed: 01/20/2023]
Abstract
BACKGROUND MicroRNAs have recently been recognized to be engaged in the development of bone diseases. OBJECTIVE This study was performed to elucidate the effects of miR-144-3p on proliferation and osteogenesis of mesenchymal stem cells (MSCs) from the patients with steroid-associated osteonecrosis (ONFH) and its related mechanism. METHOD The expression level of miR-144-3p in the MSCs from the proximal femur of the patients was examined by Real-time PCR. The cell proliferation ability was assayed by MTT. The differentiation ability of MSCs was assayed by Alizarin Red S (ARS) staining. The interaction between miR-144-3p and frizzled4 (FZD4) was investigated by Real-time PCR, western blot and luciferase reporter assay. RESULTS ONFH samples had the obviously high expression of miR-144-3p compared to the control. MiR-144-3p had a negative effect on the proliferation and osteogenesis of MSCs. Via targeting FZD4, miR-144-3p decreased β-catenin nuclear translocation, the transcription of RUNX2 and COL1A1. Over-expression of FZD4 partially reversed miR-144-3p-induced decrease in the proliferation and osteogenesis of MSCs. CONCLUSION MiR-144-3p might play an important role in the development of ONFH and might be used as a novel class of therapeutic targets for this disease.
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Affiliation(s)
- Zhibo Sun
- Department of Orthopedics, Renmin Hospital, Wuhan University, Wuhan, China
| | - Fei Wu
- Department of Orthopedics, Renmin Hospital, Wuhan University, Wuhan, China
| | - Yue Yang
- Department of Orthopedics, Renmin Hospital, Wuhan University, Wuhan, China
| | - Feng Liu
- Department of Orthopedics, Renmin Hospital, Wuhan University, Wuhan, China
| | - Fengbo Mo
- Department of Orthopedics, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Jin Chen
- Department of Orthopedics, Yiling Hospital, Yichang, China
| | - Guangyong Wang
- Department of Orthopedics, Yiling Hospital, Yichang, China
| | - Bo Zhang
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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17
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Senile Osteoporosis: The Involvement of Differentiation and Senescence of Bone Marrow Stromal Cells. Int J Mol Sci 2020; 21:ijms21010349. [PMID: 31948061 PMCID: PMC6981793 DOI: 10.3390/ijms21010349] [Citation(s) in RCA: 125] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 12/26/2019] [Accepted: 12/31/2019] [Indexed: 12/12/2022] Open
Abstract
Senile osteoporosis has become a worldwide bone disease with the aging of the world population. It increases the risk of bone fracture and seriously affects human health. Unlike postmenopausal osteoporosis which is linked to menopause in women, senile osteoporosis is due to aging, hence, affecting both men and women. It is commonly found in people with more than their 70s. Evidence has shown that with age increase, bone marrow stromal cells (BMSCs) differentiate into more adipocytes rather than osteoblasts and undergo senescence, which leads to decreased bone formation and contributes to senile osteoporosis. Therefore, it is necessary to uncover the molecular mechanisms underlying the functional changes of BMSCs. It will benefit not only for understanding the senile osteoporosis development, but also for finding new therapies to treat senile osteoporosis. Here, we review the recent advances of the functional alterations of BMSCs and the related mechanisms during senile osteoporosis development. Moreover, the treatment of senile osteoporosis by aiming at BMSCs is introduced.
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18
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Naji A, Eitoku M, Favier B, Deschaseaux F, Rouas-Freiss N, Suganuma N. Biological functions of mesenchymal stem cells and clinical implications. Cell Mol Life Sci 2019; 76:3323-3348. [PMID: 31055643 PMCID: PMC11105258 DOI: 10.1007/s00018-019-03125-1] [Citation(s) in RCA: 295] [Impact Index Per Article: 59.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 04/19/2019] [Accepted: 04/30/2019] [Indexed: 02/06/2023]
Abstract
Mesenchymal stem cells (MSCs) are isolated from multiple biological tissues-adult bone marrow and adipose tissues and neonatal tissues such as umbilical cord and placenta. In vitro, MSCs show biological features of extensive proliferation ability and multipotency. Moreover, MSCs have trophic, homing/migration and immunosuppression functions that have been demonstrated both in vitro and in vivo. A number of clinical trials are using MSCs for therapeutic interventions in severe degenerative and/or inflammatory diseases, including Crohn's disease and graft-versus-host disease, alone or in combination with other drugs. MSCs are promising for therapeutic applications given the ease in obtaining them, their genetic stability, their poor immunogenicity and their curative properties for tissue repair and immunomodulation. The success of MSC therapy in degenerative and/or inflammatory diseases might depend on the robustness of the biological functions of MSCs, which should be linked to their therapeutic potency. Here, we outline the fundamental and advanced concepts of MSC biological features and underline the biological functions of MSCs in their basic and translational aspects in therapy for degenerative and/or inflammatory diseases.
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Affiliation(s)
- Abderrahim Naji
- Department of Environmental Medicine, Cooperative Medicine Unit, Research and Education Faculty, Medicine Science Cluster, Kochi Medical School, Kochi University, Kohasu, Oko-Cho, Nankoku, Kochi, 783-8505, Japan.
| | - Masamitsu Eitoku
- Department of Environmental Medicine, Cooperative Medicine Unit, Research and Education Faculty, Medicine Science Cluster, Kochi Medical School, Kochi University, Kohasu, Oko-Cho, Nankoku, Kochi, 783-8505, Japan
| | - Benoit Favier
- CEA, DRF-IBFJ, IDMIT, INSERM U1184, Immunology of Viral Infections and Autoimmune Diseases, Paris-Sud University, Fontenay-aux-Roses, France
| | - Frédéric Deschaseaux
- STROMALab, Etablissement Français du Sang Occitanie, UMR 5273 CNRS, INSERM U1031, Université de Toulouse, Toulouse, France
| | - Nathalie Rouas-Freiss
- CEA, DRF-Francois Jacob Institute, Research Division in Hematology and Immunology (SRHI), Saint-Louis Hospital, IRSL, UMRS 976, Paris, France
| | - Narufumi Suganuma
- Department of Environmental Medicine, Cooperative Medicine Unit, Research and Education Faculty, Medicine Science Cluster, Kochi Medical School, Kochi University, Kohasu, Oko-Cho, Nankoku, Kochi, 783-8505, Japan
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19
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Wang C, Tanjaya J, Shen J, Lee S, Bisht B, Pan HC, Pang S, Zhang Y, Berthiaume EA, Chen E, Da Lio AL, Zhang X, Ting K, Guo S, Soo C. Peroxisome Proliferator-Activated Receptor-γ Knockdown Impairs Bone Morphogenetic Protein-2-Induced Critical-Size Bone Defect Repair. THE AMERICAN JOURNAL OF PATHOLOGY 2019; 189:648-664. [PMID: 30593824 PMCID: PMC6412314 DOI: 10.1016/j.ajpath.2018.11.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 10/13/2018] [Accepted: 11/13/2018] [Indexed: 12/15/2022]
Abstract
The Food and Drug Administration-approved clinical dose (1.5 mg/mL) of bone morphogenetic protein-2 (BMP2) has been reported to induce significant adverse effects, including cyst-like adipose-infiltrated abnormal bone formation. These undesirable complications occur because of increased adipogenesis, at the expense of osteogenesis, through BMP2-mediated increases in the master regulatory gene for adipogenesis, peroxisome proliferator-activated receptor-γ (PPARγ). Inhibiting PPARγ during osteogenesis has been suggested to drive the differentiation of bone marrow stromal/stem cells toward an osteogenic, rather than an adipogenic, lineage. We demonstrate that knocking down PPARγ while concurrently administering BMP2 can reduce adipogenesis, but we found that it also impairs BMP2-induced osteogenesis and leads to bone nonunion in a mouse femoral segmental defect model. In addition, in vitro studies using the mouse bone marrow stromal cell line M2-10B4 and mouse primary bone marrow stromal cells confirmed that PPARγ knockdown inhibits BMP2-induced adipogenesis; attenuates BMP2-induced cell proliferation, migration, invasion, and osteogenesis; and escalates BMP2-induced cell apoptosis. More important, BMP receptor 2 and 1B expression was also significantly inhibited by the combined BMP2 and PPARγ knockdown treatment. These findings indicate that PPARγ is critical for BMP2-mediated osteogenesis during bone repair. Thus, uncoupling BMP2-mediated osteogenesis and adipogenesis using PPARγ inhibition to combat BMP2's adverse effects may not be feasible.
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Affiliation(s)
- Chenchao Wang
- Department of Plastic Surgery, First Hospital of China Medical University, Shenyang, People's Republic of China; Dental and Craniofacial Research Institute and Section of Orthodontics, School of Dentistry, University of California, Los Angeles, Los Angeles, California; Division of Plastic and Reconstructive Surgery, Department of Orthopaedic Surgery, and Orthopaedic Hospital Research Center, University of California, Los Angeles, Los Angeles, California
| | - Justine Tanjaya
- Dental and Craniofacial Research Institute and Section of Orthodontics, School of Dentistry, University of California, Los Angeles, Los Angeles, California
| | - Jia Shen
- Dental and Craniofacial Research Institute and Section of Orthodontics, School of Dentistry, University of California, Los Angeles, Los Angeles, California
| | - Soonchul Lee
- Dental and Craniofacial Research Institute and Section of Orthodontics, School of Dentistry, University of California, Los Angeles, Los Angeles, California; Department of Orthopaedic Surgery, CHA Bundang Medical Center, CHA University, Seongnam, Republic of Korea
| | - Bharti Bisht
- Dental and Craniofacial Research Institute and Section of Orthodontics, School of Dentistry, University of California, Los Angeles, Los Angeles, California
| | - Hsin Chuan Pan
- Dental and Craniofacial Research Institute and Section of Orthodontics, School of Dentistry, University of California, Los Angeles, Los Angeles, California
| | - Shen Pang
- Dental and Craniofacial Research Institute and Section of Orthodontics, School of Dentistry, University of California, Los Angeles, Los Angeles, California
| | - Yulong Zhang
- Departments of Materials Science and Engineering, and Division of Advanced Prosthodontics, University of California, Los Angeles, Los Angeles, California
| | - Emily A Berthiaume
- David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California
| | - Eric Chen
- Dental and Craniofacial Research Institute and Section of Orthodontics, School of Dentistry, University of California, Los Angeles, Los Angeles, California
| | - Andrew L Da Lio
- Division of Plastic and Reconstructive Surgery, Department of Orthopaedic Surgery, and Orthopaedic Hospital Research Center, University of California, Los Angeles, Los Angeles, California
| | - Xinli Zhang
- Dental and Craniofacial Research Institute and Section of Orthodontics, School of Dentistry, University of California, Los Angeles, Los Angeles, California
| | - Kang Ting
- Dental and Craniofacial Research Institute and Section of Orthodontics, School of Dentistry, University of California, Los Angeles, Los Angeles, California
| | - Shu Guo
- Department of Plastic Surgery, First Hospital of China Medical University, Shenyang, People's Republic of China.
| | - Chia Soo
- Division of Plastic and Reconstructive Surgery, Department of Orthopaedic Surgery, and Orthopaedic Hospital Research Center, University of California, Los Angeles, Los Angeles, California.
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20
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Wu F, Jiao J, Liu F, Yang Y, Zhang S, Fang Z, Dai Z, Sun Z. Hypermethylation of Frizzled1 is associated with Wnt/β-catenin signaling inactivation in mesenchymal stem cells of patients with steroid-associated osteonecrosis. Exp Mol Med 2019; 51:1-9. [PMID: 30808872 PMCID: PMC6391470 DOI: 10.1038/s12276-019-0220-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 11/07/2018] [Accepted: 12/06/2018] [Indexed: 12/27/2022] Open
Abstract
The Wnt/β-catenin signaling pathway is associated with the pathogenesis of steroid-induced osteonecrosis. Our investigation studied whether aberrant CpG island hypermethylation of the FZD1 gene was present in patients with osteonecrosis of the femoral head (ONFH), which results in Wnt/β-catenin signaling inactivation and subsequent cell dysfunction. Bone marrow was collected from the proximal femurs of patients with steroid-associated ONFH (n = 21) and patients with new femoral neck fractures (n = 22), and then mesenchymal stem cells (MSCs) were isolated. We investigated cell viability, the transcription and translation levels of Wnt/β-catenin signaling-related genes, the extent of methylation at CpG islands of the FZD1 promoter, and the osteogenic and adipogenic differentiation abilities of MSCs from the control group and from the ONFH group treated with or without 5′-Aza-dC. According to the results, MSCs from the ONFH group showed a reduced proliferation ability, low transcription and translation levels of FZD1, inhibition of the Wnt/β-catenin signaling pathway, weakened osteogenesis and enhanced adipogenesis ability. Aberrant CpG island hypermethylation of FZD1 was observed in the ONFH group. Treatment with 5’-Aza-dC resulted in de novo FZD1 expression, reactivation of the Wnt/β-catenin signaling pathway and promotion of osteogenesis. Taken together, our study not only provides novel insights into the regulation of the Wnt/β-catenin signaling pathway in this disease but also reveals potential for the use of demethylating agents for the treatment of GC-associated ONFH. Studies of genetic and molecular signaling processes in the bone disease osteonecrosis, when it is associated with steroid use, reveal insights into disease development and suggest new approaches for treatment. Steroid drugs increase the risk of osteonecrosis, in which bone tissue dies due to insufficient blood supply, but the mechanism of this effect is unclear. Researchers in China, led by Zhibo Sun at Wuhan University, investigated a link between the aberrant addition of methyl groups (CH3) to the DNA of a specific gene and the onset of the disease. They identified an important molecular signaling pathway in cultured bone marrow cells from patients that is inhibited by the gene methylation. Treating these cells with a drug that inhibits methylation led to reactivation of the gene and the associated signalling pathway that promotes healthy bone formation.
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Affiliation(s)
- Fei Wu
- Department of Orthopedics, Renmin Hospital, Wuhan University, Wuhan, Hubei, China
| | - Jing Jiao
- Department of Orthopedics, Wuhan Fourth Hospital; Puai Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Feng Liu
- Department of Orthopedics, Renmin Hospital, Wuhan University, Wuhan, Hubei, China
| | - Yue Yang
- Department of Orthopedics, Renmin Hospital, Wuhan University, Wuhan, Hubei, China
| | - Shanfeng Zhang
- Department of Orthopedics, Wuhan Fourth Hospital; Puai Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Zhenhua Fang
- Department of Orthopedics, Wuhan Fourth Hospital; Puai Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Zhipeng Dai
- Department of Orthopedics, Henan Provincial People's Hospital, Zhengzhou, Henan, China
| | - Zhibo Sun
- Department of Orthopedics, Renmin Hospital, Wuhan University, Wuhan, Hubei, China. .,Department of Orthopedics, Wuhan Fourth Hospital; Puai Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.
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21
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Jeong JK, Lee JH, Kim SW, Hong JM, Seol JW, Park SY. Cellular prion protein regulates the differentiation and function of adipocytes through autophagy flux. Mol Cell Endocrinol 2019; 481:84-94. [PMID: 30513342 DOI: 10.1016/j.mce.2018.11.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 11/06/2018] [Accepted: 11/23/2018] [Indexed: 02/06/2023]
Abstract
The role of autophagy modulation in adipogenic differentiation and the possible autophagy modulators targeting adipogenesis remain unclear. In this study, we investigated whether normal cellular prion protein (PrP<C>) is involved in the modulation of autophagy and affects adipogenic differentiation in vivo and in vitro. Surprisingly, autophagy flux signals were activated in the adipose tissue of prion protein-deficient mice and PrP<C>-deleted 3T3-L1 adipocytes. The activation of autophagy flux mediated by PrP<C> deletion was confirmed in the adipose tissue via transmission electron microscopy. Adipocyte differentiation factors were highly induced in prion protein-deficient adipose tissue and 3T3-L1 adipocytes. In addition, deletion of prion protein significantly increased visceral fat volume, body fat weight, adipocyte cell size, and body weight gain in Prnp-knockout mice and increased lipid accumulation in PrP<C> siRNA-transfected 3T3-L1 cells. However, the overexpression of prion protein using adenovirus inhibited the autophagic flux signals, lipid accumulation, and the PPAR-γ and C/EBP-α mRNA and protein expression levels in comparison to those in the control cells. Our results demonstrated that deletion of normal prion protein accelerated adipogenic differentiation and lipid accumulation mediated via autophagy flux activation.
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Affiliation(s)
- Jae-Kyo Jeong
- Biosafety Research Institute, College of Veterinary Medicine, Chonbuk National University, Iksan, Jeonbuk, 54596, Republic of Korea
| | - Ju-Hee Lee
- Biosafety Research Institute, College of Veterinary Medicine, Chonbuk National University, Iksan, Jeonbuk, 54596, Republic of Korea
| | - Sung-Wook Kim
- Biosafety Research Institute, College of Veterinary Medicine, Chonbuk National University, Iksan, Jeonbuk, 54596, Republic of Korea
| | - Jeong-Min Hong
- Biosafety Research Institute, College of Veterinary Medicine, Chonbuk National University, Iksan, Jeonbuk, 54596, Republic of Korea
| | - Jae-Won Seol
- Biosafety Research Institute, College of Veterinary Medicine, Chonbuk National University, Iksan, Jeonbuk, 54596, Republic of Korea
| | - Sang-Youel Park
- Biosafety Research Institute, College of Veterinary Medicine, Chonbuk National University, Iksan, Jeonbuk, 54596, Republic of Korea.
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22
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Bae HK, Jung BD, Lee S, Park CK, Yang BK, Cheong HT. Correlation of spontaneous adipocyte generation with osteogenic differentiation of porcine skin-derived stem cells. J Vet Sci 2019; 20:16-26. [PMID: 30481989 PMCID: PMC6351758 DOI: 10.4142/jvs.2019.20.1.16] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 10/18/2018] [Accepted: 11/06/2018] [Indexed: 12/13/2022] Open
Abstract
The objective of this study was to examine effects of spontaneous adipocyte generation on osteogenic differentiation of porcine skin-derived stem cells (pSSCs). Correlation between osteogenic differentiation and adipocyte differentiation induced by osteocyte induction culture was determined using different cell lines. Osteogenic differentiation efficiency of pSSCs was then analyzed by controlling the expression of adipocyte-specific transcription factors during osteogenic induction culture. Among four cell lines, pSSCs-II had the lowest lipid droplet level but the highest calcium content (p < 0.05). It also expressed significantly low levels of peroxisome proliferator-activated receptor gamma 2 (PPARγ2) and adipocyte protein 2 (aP2) mRNAs but very high levels of runt-related transcription factor 2 (Runx2) and alkaline phosphatase (ALP) mRNAs as osteogenic makers (p < 0.05). Oil red O extraction was increased by 0.1 µM troglitazone (TGZ) treatment but decreased by 50 µM bisphenol A diglycidyl ether (BADGE) (p < 0.05). Calcium content was drastically increased after BADGE treatment compared to that in osteogenic induction control and TGZ-treated pSSCs (p < 0.05). Relative expression levels of PPARγ2 and aP2 mRNAs were increased by TGZ but decreased by BADGE. Expression levels of Rucx2 and ALP mRNAs, osteoblast-specific marker genes, were significantly increased by BADGE treatment (p < 0.05). The expression level of BCL2 like 1 was significantly higher in BADGE-treated pSSCs than that in TGZ-treated ones (p < 0.05). The results demonstrate that spontaneous adipocyte generation does not adversely affect osteogenic differentiation. However, reducing spontaneous adipocyte generation by inhibiting PPARγ2 mRNA expression can enhance in vitro osteogenic differentiation of pSSCs.
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Affiliation(s)
- Hyo-Kyung Bae
- College of Veterinaryy Medicine and Institute of Veterinary Science, Kangwon National University, Chuncheon 24341, Korea
| | - Bae-Dong Jung
- College of Veterinaryy Medicine and Institute of Veterinary Science, Kangwon National University, Chuncheon 24341, Korea
| | - Seunghyung Lee
- College of Animal Life Sciences, Kangwon National University, Chuncheon 24341, Korea
| | - Choon-Keun Park
- College of Animal Life Sciences, Kangwon National University, Chuncheon 24341, Korea
| | - Boo-Keun Yang
- College of Animal Life Sciences, Kangwon National University, Chuncheon 24341, Korea
| | - Hee-Tae Cheong
- College of Veterinaryy Medicine and Institute of Veterinary Science, Kangwon National University, Chuncheon 24341, Korea
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23
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Zhu X, Yu J, Du J, Zhong G, Qiao L, Lin J. LncRNA HOXA-AS2 positively regulates osteogenesis of mesenchymal stem cells through inactivating NF-κB signalling. J Cell Mol Med 2018; 23:1325-1332. [PMID: 30536618 PMCID: PMC6349193 DOI: 10.1111/jcmm.14034] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 10/04/2018] [Accepted: 10/27/2018] [Indexed: 12/14/2022] Open
Abstract
As is previously reported, mesenchymal stem cells have potential ability to differentiate into osteocytes. However, the underlying mechanism during this biological process is poorly understood. In the present study, we identify a novel long non-coding RNA named HOXA-AS2 as a critical regulator during the formation of osteogenesis. Attenuation of HOXA-AS2 can reduce the calcium deposition and repress the alkaline phosphatase activity. Moreover, the expressions of osteogenic marker genes are markedly downregulated after HOXA-AS2 depletion. Mechanistically, we found HOXA-AS2 can regulate the transcriptional activity of NF-κB, a critical inhibitor of osteogenesis. More importantly, HOXA-AS2 knockdown could result in the transcriptional repression of the osteogenic master transcription factor SP7 by a NF-κB/HDAC2-coordinated H3K27 deacetylation mechanism. Based on these studies, we conclude that HOXA-AS2 may serve as a promising therapeutic target for bone tissue repair and regeneration in the near future.
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Affiliation(s)
- Xinxing Zhu
- Henan Joint International Research Laboratory of Stem Cell Medicine, College of Biomedical Engineering, Xinxiang Medical University, Xinxiang, China.,Stem Cell and Biotherapy Engineering Research Center of Henan, College of Life Science and Technology, Xinxiang Medical University, Xinxiang, China
| | - Jinjin Yu
- School of Psychology, Xinxiang Medical University, Xinxiang, China
| | - Jiang Du
- Henan Joint International Research Laboratory of Stem Cell Medicine, College of Biomedical Engineering, Xinxiang Medical University, Xinxiang, China.,Stem Cell and Biotherapy Engineering Research Center of Henan, College of Life Science and Technology, Xinxiang Medical University, Xinxiang, China
| | - Genshen Zhong
- Henan Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang, China
| | - Liang Qiao
- Stem Cell and Biotherapy Engineering Research Center of Henan, College of Life Science and Technology, Xinxiang Medical University, Xinxiang, China
| | - Juntang Lin
- Henan Joint International Research Laboratory of Stem Cell Medicine, College of Biomedical Engineering, Xinxiang Medical University, Xinxiang, China.,Stem Cell and Biotherapy Engineering Research Center of Henan, College of Life Science and Technology, Xinxiang Medical University, Xinxiang, China
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24
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Dai Z, Jin Y, Zheng J, Liu K, Zhao J, Zhang S, Wu F, Sun Z. MiR-217 promotes cell proliferation and osteogenic differentiation of BMSCs by targeting DKK1 in steroid-associated osteonecrosis. Biomed Pharmacother 2018; 109:1112-1119. [PMID: 30551361 DOI: 10.1016/j.biopha.2018.10.166] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 10/26/2018] [Accepted: 10/26/2018] [Indexed: 12/18/2022] Open
Abstract
MicroRNAs (miRNAs) have recently been recognized to play an important role in bone-associated diseases. This study aims to explore the expression profile and biological function of miR-217, which is known to be related to tumor cell proliferation and migration, to the proliferation and osteogenic differentiation of MSCs from the patients with steroid-associated osteonecrosis (ONFH). Bone marrow was obtained from the proximal femur of 10 patients with ONFH and 10 patients with femoral neck fractures. Bone marrow-derived mesenchymal stem cells (MSCs) were isolated and cultured. The expression profile, biological function of miR-217 and the interaction between miR-217 and DKK1 were assayed using cell viability measurement, western blot, Real-time PCR, luciferase reporter assay, Alizarin Red S (ARS) staining. We noted that the expression level of miR-217 was significantly decreased in the ONFH samples compared to the control samples (P < 0.0001). By targeting DKK1, miR-217 promoted nuclear translocation of β-catenin, increased expression of RUNX2, COL1A1 and obviously promoted the proliferation and differentiation of MSCs. Restoring the expression of DKK1 in the MSCs partially reversed the role of miR-217. These findings suggest that miR-217 promotes cell proliferation and osteogenic differentiation by inhibiting DKK1 during the development of steroid-associated osteonecrosis.
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Affiliation(s)
- Zhipeng Dai
- Department of Orthopedics, Henan Provincial People's Hospital, Zhengzhou, Henan, China
| | - Yi Jin
- Department of Orthopedics, Henan Provincial People's Hospital, Zhengzhou, Henan, China.
| | - Jia Zheng
- Department of Orthopedics, Henan Provincial People's Hospital, Zhengzhou, Henan, China
| | - Ke Liu
- Department of Orthopedics, Henan Provincial People's Hospital, Zhengzhou, Henan, China
| | - Jiajun Zhao
- Department of Orthopedics, Henan Provincial People's Hospital, Zhengzhou, Henan, China
| | - Shanfeng Zhang
- Department of Orthopedics, Wuhan Fourth Hospital, Puai Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Fei Wu
- Department of Orthopedics, Renmin Hospital, Wuhan University, Wuhan, Hubei, China
| | - Zhibo Sun
- Department of Orthopedics, Renmin Hospital, Wuhan University, Wuhan, Hubei, China; Department of Orthopedics, Wuhan Fourth Hospital, Puai Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.
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25
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Effect of Leptin on Marrow Adiposity in Ovariectomized Rabbits Assessed by Proton Magnetic Resonance Spectroscopy. J Comput Assist Tomogr 2018; 42:588-593. [PMID: 29489596 DOI: 10.1097/rct.0000000000000725] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE Leptin acts to influence bone metabolism through indirect hypothalamic relay and direct peripheral pathways. Leptin enhances the differentiation of mesenchymal stem cells to the osteoblast rather than the adipocyte lineage, but the in vivo impacts of leptin on ovariectomy (OVX)-induced marrow adiposity are poorly understood. In this work, we aimed to address this question. METHODS Forty-five female New Zealand rabbits were divided into sham + vehicle, OVX + vehicle, and OVX + leptin for 5 months. Magnetic resonance spectroscopy and dual-energy x-ray absorptiometry were performed to longitudinally evaluate marrow fat fraction and bone density at 0, 2.5, and 5 months, respectively. At the end of experiment, quantitative parameters of marrow adipocytes were assessed by histopathology. RESULTS Estrogen-deficient rabbits markedly exhibited expansion of marrow fat in a time-dependent manner, with a variation of marrow fat fraction (+19.7%) at 2.5 months relative to baseline conditions, and it was maintained until 5 months (+49.2%; all P < 0.001), which was accompanied by diminished bone density. Adipocyte diameter, density, and adipocytes area percentage in the OVX controls was increased by 50.7%, 76.3%, and 135.5%, respectively, relative to the sham controls (all P < 0.001). These OVX-induced marrow adiposity and bone loss were partly restored by leptin treatment. Treatment with leptin prevented OVX-induced increases in bone turnover in rabbits. CONCLUSIONS Early leptin administration inhibits the adipogenic effect of estrogen deficiency in terms of reverting marrow fat expansion seen in OVX rabbits. Magnetic resonance spectroscopy may be a useful tool for longitudinal and interventional assessments in osteoporosis.
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26
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Novel Neohesperidin Dihydrochalcone Analogue Inhibits Adipogenic Differentiation of Human Adipose-Derived Stem Cells through the Nrf2 Pathway. Int J Mol Sci 2018; 19:ijms19082215. [PMID: 30060630 PMCID: PMC6121477 DOI: 10.3390/ijms19082215] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 07/12/2018] [Accepted: 07/24/2018] [Indexed: 12/12/2022] Open
Abstract
Obesity, characterized by excess lipid accumulation, has emerged as a leading public health problem. Excessive, adipocyte-induced lipid accumulation raises the risk of metabolic disorders. Adipose-derived stem cells (ASCs) are mesenchymal stem cells (MSCs) that can be obtained from abundant adipose tissue. High fat mass could be caused by an increase in the size (hypertrophy) and number (hyperplasia) of adipocytes. Reactive oxygen species (ROS) are involved in the adipogenic differentiation of human adipose-derived stem cells (hASCs). Lowering the level of ROS is important to blocking or retarding the adipogenic differentiation of hASCs. Nuclear factor erythroid 2-related factor-2 (Nrf2) is a transcription factor that mediates various antioxidant enzymes and regulates cellular ROS levels. Neohesperidin dihydrochalcone (NHDC), widely used as artificial sweetener, has been shown to have significant free radical scavenging activity. In the present study, (E)-3-(4-chlorophenyl)-1-(2,4,6-trimethoxyphenyl)prop-2-en-1-one (CTP), a novel NHDC analogue, was synthesized and examined to determine whether it could inhibit adipogenic differentiation. The inhibition of adipogenic differentiation in hASCs was tested using NHDC and CTP. In the CTP group, reduced Oil Red O staining was observed compared with the differentiation group. CTP treatment also downregulated the expression of PPAR-γ and C/EBP-α, adipogenic differentiation markers in hASCs, compared to the adipogenic differentiation group. The expression of FAS and SREBP-1 decreased in the CTP group, along with the fluorescent intensity (amount) of ROS. Expression of the Nrf2 protein was slightly decreased in the differentiation group. Meanwhile, in both the NHDC and CTP groups, Nrf2 expression was restored to the level of the control group. Moreover, the expression of HO-1 and NQO-1 increased significantly in the CTP group. Taken together, these results suggest that CTP treatment suppresses the adipogenic differentiation of hASCs by decreasing intracellular ROS, possibly through activation of the Nrf2 cytoprotective pathway. Thus, the use of bioactive substances such as CTP, which activates Nrf2 to reduce the cellular level of ROS and inhibit the adipogenic differentiation of hASCs, could be a new strategy for overcoming obesity.
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27
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Bolamperti S, Signo M, Spinello A, Moro G, Fraschini G, Guidobono F, Rubinacci A, Villa I. GH prevents adipogenic differentiation of mesenchymal stromal stem cells derived from human trabecular bone via canonical Wnt signaling. Bone 2018; 112:136-144. [PMID: 29694926 DOI: 10.1016/j.bone.2018.04.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 04/16/2018] [Accepted: 04/16/2018] [Indexed: 10/17/2022]
Abstract
The imbalance between osteogenesis and adipogenesis, which naturally accompanies bone marrow senescence, may contribute to the development of bone-associated diseases, like osteoporosis. In the present study, using primary human mesenchymal stromal cells (hMSCs) isolated from trabecular bone, we assessed the possible effect of GH on hMSC differentiation potential into adipocytes. GH (5 ng/ml) significantly inhibited the lipid accumulation in hMSCs cultured for 14 days in lipogenic medium. GH decreased the expression of the adipogenic genes, CCAAT/enhancer-binding protein alpha (C/EBPα) and adiponectin (ADN) as well as the expression of two lipogenesis-related enzymes, lipoprotein lipase (LPL) and acethylCoA carboxylase (ACACA). In parallel, GH induced an increase in the gene expression and protein levels of osterix (OSX) and osteoprotegerin (OPG). These effects were ascribed to enhanced Wnt signaling as GH significantly reduced Wnt inhibitors, Dickkopf 1 (DKK1) and the secreted frizzled protein 2 (SFRP2), and increased the expression of an activator of Wnt, Wnt3. Accordingly, the expression of β-catenin and its nuclear levels were raised. Wnt involvement in GH anti-adipogenic effect was further confirmed by the silencing of β-catenin. In silenced hMSC, both the inhibitory effect of GH on the expression of the adipogenic genes, ADN and C/EBPα and the lipogenesis enzymes LPL and ACACA, were prevented together with the stimulatory effect of GH on the osteogenic genes OSX and OPG. The present study supports the hypothesis that when GH secretion declines as in aging, the fat in the bone-marrow cavities increases and the osteogenic capacity of the MSC pool is reduced due to a decrease in Wnt signaling.
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Affiliation(s)
- Simona Bolamperti
- Bone Metabolism Unit, Division of Genetics and Cell Biology, San Raffaele Scientific Institute, Milan, Italy
| | - Michela Signo
- Bone Metabolism Unit, Division of Genetics and Cell Biology, San Raffaele Scientific Institute, Milan, Italy
| | - Alice Spinello
- Bone Metabolism Unit, Division of Genetics and Cell Biology, San Raffaele Scientific Institute, Milan, Italy
| | - GianLuigi Moro
- Orthopaedic Unit, Dept of Surgery, San Raffaele Scientific Institute, Milan, Italy
| | - Gianfranco Fraschini
- Orthopaedic Unit, Dept of Surgery, San Raffaele Scientific Institute, Milan, Italy
| | - Francesca Guidobono
- Bone Metabolism Unit, Division of Genetics and Cell Biology, San Raffaele Scientific Institute, Milan, Italy
| | - Alessandro Rubinacci
- Bone Metabolism Unit, Division of Genetics and Cell Biology, San Raffaele Scientific Institute, Milan, Italy
| | - Isabella Villa
- Bone Metabolism Unit, Division of Genetics and Cell Biology, San Raffaele Scientific Institute, Milan, Italy.
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28
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Weske S, Vaidya M, Reese A, von Wnuck Lipinski K, Keul P, Bayer JK, Fischer JW, Flögel U, Nelsen J, Epple M, Scatena M, Schwedhelm E, Dörr M, Völzke H, Moritz E, Hannemann A, Rauch BH, Gräler MH, Heusch G, Levkau B. Targeting sphingosine-1-phosphate lyase as an anabolic therapy for bone loss. Nat Med 2018; 24:667-678. [PMID: 29662200 DOI: 10.1038/s41591-018-0005-y] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Accepted: 02/13/2018] [Indexed: 11/09/2022]
Abstract
Sphingosine-1-phosphate (S1P) signaling influences bone metabolism, but its therapeutic potential in bone disorders has remained unexplored. We show that raising S1P levels in adult mice through conditionally deleting or pharmacologically inhibiting S1P lyase, the sole enzyme responsible for irreversibly degrading S1P, markedly increased bone formation, mass and strength and substantially decreased white adipose tissue. S1P signaling through S1P2 potently stimulated osteoblastogenesis at the expense of adipogenesis by inversely regulating osterix and PPAR-γ, and it simultaneously inhibited osteoclastogenesis by inducing osteoprotegerin through newly discovered p38-GSK3β-β-catenin and WNT5A-LRP5 pathways. Accordingly, S1P2-deficient mice were osteopenic and obese. In ovariectomy-induced osteopenia, S1P lyase inhibition was as effective as intermittent parathyroid hormone (iPTH) treatment in increasing bone mass and was superior to iPTH in enhancing bone strength. Furthermore, lyase inhibition in mice successfully corrected severe genetic osteoporosis caused by osteoprotegerin deficiency. Human data from 4,091 participants of the SHIP-Trend population-based study revealed a positive association between serum levels of S1P and bone formation markers, but not resorption markers. Furthermore, serum S1P levels were positively associated with serum calcium , negatively with PTH , and curvilinearly with body mass index. Bone stiffness, as determined through quantitative ultrasound, was inversely related to levels of both S1P and the bone formation marker PINP, suggesting that S1P stimulates osteoanabolic activity to counteract decreasing bone quality. S1P-based drugs should be considered as a promising therapeutic avenue for the treatment of osteoporotic diseases.
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Affiliation(s)
- Sarah Weske
- Institute for Pathophysiology, West German Heart and Vascular Center, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Mithila Vaidya
- Institute for Pathophysiology, West German Heart and Vascular Center, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Alina Reese
- Institute for Pathophysiology, West German Heart and Vascular Center, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Karin von Wnuck Lipinski
- Institute for Pathophysiology, West German Heart and Vascular Center, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Petra Keul
- Institute for Pathophysiology, West German Heart and Vascular Center, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Julia K Bayer
- Institute of Pharmacology and Clinical Pharmacology, University of Düsseldorf, Düsseldorf, Germany
| | - Jens W Fischer
- Institute of Pharmacology and Clinical Pharmacology, University of Düsseldorf, Düsseldorf, Germany
| | - Ulrich Flögel
- Institute of Molecular Cardiology, University of Düsseldorf, Düsseldorf, Germany
| | - Jens Nelsen
- Institute of Inorganic Chemistry, University of Duisburg-Essen, Essen, Germany
| | - Matthias Epple
- Institute of Inorganic Chemistry, University of Duisburg-Essen, Essen, Germany
| | - Marta Scatena
- Department of Bioengineering, University of Washington, Seattle, WA, USA
| | - Edzard Schwedhelm
- Institute of Clinical Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.,German Centre for Cardiovascular Research (DZHK), partner site Hamburg, Hamburg, Germany
| | - Marcus Dörr
- DZHK, partner site Greifswald, Greifswald, Germany.,Department of Internal Medicine B, University Medicine Greifswald, Greifswald, Germany
| | - Henry Völzke
- Institute for Community Medicine, University Medicine Greifswald, Greifswald, Germany
| | - Eileen Moritz
- DZHK, partner site Greifswald, Greifswald, Germany.,Institute of Pharmacology, Department of General Pharmacology, University Medicine Greifswald, Greifswald, Germany
| | - Anke Hannemann
- Institute of Clinical Chemistry and Laboratory Medicine, University Medicine Greifswald, Greifswald, Germany
| | - Bernhard H Rauch
- DZHK, partner site Greifswald, Greifswald, Germany.,Institute of Pharmacology, Department of General Pharmacology, University Medicine Greifswald, Greifswald, Germany
| | - Markus H Gräler
- Institute of Pharmacology, Department of General Pharmacology, University Medicine Greifswald, Greifswald, Germany.,Department of Anesthesiology and Intensive Care Medicine, Center for Sepsis Control and Care, and Center for Molecular Biomedicine, University Hospital Jena, Jena, Germany
| | - Gerd Heusch
- Institute for Pathophysiology, West German Heart and Vascular Center, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Bodo Levkau
- Institute for Pathophysiology, West German Heart and Vascular Center, University Hospital Essen, University of Duisburg-Essen, Essen, Germany.
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29
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Ji Y, Cao M, Liu J, Chen Y, Li X, Zhao J, Qu C. Rock signaling control PPARγ expression and actin polymerization during adipogenesis. Saudi J Biol Sci 2018; 24:1866-1870. [PMID: 29551937 PMCID: PMC5851925 DOI: 10.1016/j.sjbs.2017.11.029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 11/09/2017] [Accepted: 11/09/2017] [Indexed: 11/25/2022] Open
Abstract
Aim: Adipogenesis is characterized by a strong interdependence between cell shape, cytoskeletal organization, and the onset of adipogenic gene expression. Here we investigated the role of the RhoA/ROCK pathway in adipogenesis. Result: High RhoA activity in the cell line C3H10T1/2 were generated (Named RhoA14V cells). Treatment of RhoA14V cells with Shield 1 following their differentiation into adipocytes resulted in the appearance of thick cortical actin filaments, and increased mRNA expression levels of RhoA, ROCK, p-MYPT1 and p-MLC, while PPARγ mRNA decreased. This resulted in decreased triglyceride synthesis and reduced expression of the adipogenic transcription factor PPARγ. These molecular changes were accompanied by reorganization of the actin cytoskeleton, during which ROCK signaling suppressed actin polymerization. Conclusion: ROCK signaling suppresses adipogenesis by controlling PPARγ expression and actin organization in adipocytes.
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Affiliation(s)
- Yuntao Ji
- School of Biology and Food Engineering, FuYang Normal University, Fuyang, Anhui 236041, China
| | - Meixia Cao
- School of Biology and Food Engineering, FuYang Normal University, Fuyang, Anhui 236041, China
| | - Jia Liu
- School of Biology and Food Engineering, FuYang Normal University, Fuyang, Anhui 236041, China
| | - Yanfei Chen
- School of Biology and Food Engineering, FuYang Normal University, Fuyang, Anhui 236041, China
| | - Xiaoli Li
- School of Biology and Food Engineering, FuYang Normal University, Fuyang, Anhui 236041, China
| | - Jing Zhao
- School of Biology and Food Engineering, FuYang Normal University, Fuyang, Anhui 236041, China
| | - Changqing Qu
- School of Biology and Food Engineering, FuYang Normal University, Fuyang, Anhui 236041, China
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Mesenchymal Stem Cells: Cell Fate Decision to Osteoblast or Adipocyte and Application in Osteoporosis Treatment. Int J Mol Sci 2018; 19:ijms19020360. [PMID: 29370110 PMCID: PMC5855582 DOI: 10.3390/ijms19020360] [Citation(s) in RCA: 250] [Impact Index Per Article: 41.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 01/13/2018] [Accepted: 01/22/2018] [Indexed: 12/11/2022] Open
Abstract
Osteoporosis is a progressive skeletal disease characterized by decreased bone mass and degraded bone microstructure, which leads to increased bone fragility and risks of bone fracture. Osteoporosis is generally age related and has become a major disease of the world. Uncovering the molecular mechanisms underlying osteoporosis and developing effective prevention and therapy methods has great significance for human health. Mesenchymal stem cells (MSCs) are multipotent cells capable of differentiating into osteoblasts, adipocytes, or chondrocytes, and have become the favorite source of cell-based therapy. Evidence shows that during osteoporosis, a shift of the cell differentiation of MSCs to adipocytes rather than osteoblasts partly contributes to osteoporosis. Thus, uncovering the molecular mechanisms of the osteoblast or adipocyte differentiation of MSCs will provide more understanding of MSCs and perhaps new methods of osteoporosis treatment. The MSCs have been applied to both preclinical and clinical studies in osteoporosis treatment. Here, we review the recent advances in understanding the molecular mechanisms regulating osteoblast differentiation and adipocyte differentiation of MSCs and highlight the therapeutic application studies of MSCs in osteoporosis treatment. This will provide researchers with new insights into the development and treatment of osteoporosis.
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31
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Chin KY, Pang KL, Mark-Lee WF. A Review on the Effects of Bisphenol A and Its Derivatives on Skeletal Health. Int J Med Sci 2018; 15:1043-1050. [PMID: 30013446 PMCID: PMC6036156 DOI: 10.7150/ijms.25634] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Accepted: 06/06/2018] [Indexed: 12/12/2022] Open
Abstract
Bisphenol A (BPA) is an endocrine disruptor which can bind to the oestrogen receptor. It also possesses oestrogenic, antiandrogenic, inflammatory and oxidative properties. Since bone responds to changes in sex hormones, inflammatory and oxidative status, BPA exposure could influence bone health in humans. This review aimed to summarize the current evidence on the relationship between BPA and bone health derived from cellular, animal and human studies. Exposure to BPA (0.5-12.5 µM) decreased the proliferation of osteoblast and osteoclast precursor cells and induce their apoptosis. Bisphenol AF (10 nM) enhanced transforming growth factor beta signalling but bisphenol S (10 nM) inhibited Wnt signalling involved in osteoblast differentiation in vitro. In animals, BPA and its derivatives demonstrated distinct effects in different models. In prenatal/postnatal exposure, BPA increased femoral bone mineral content in male rats (at 25 ug/kg/day) but decreased femoral mechanical strength in female mice (at 10 µg/kg/day). In oestrogen deficiency models, BPA improved bone mineral density and microstructures in aromatase knockout mice (at very high dose, 0.1% or 1.0% w/w diet) but decreased trabecular density in ovariectomized rats (at 37 or 370 ug/kg/day). In contrast, bisphenol A diglycidyl ether (30 mg/kg/day i.p.) improved bone health in normal male and female rodents and decreased trabecular separation in ovariectomized rodents. Two cross-sectional studies have been performed to examine the relationship between BPA level and bone mineral density in humans but they yielded negligible association. As a conclusion, BPA and its derivatives could influence bone health and a possible gender effect was observed in animal studies. However, its effects in humans await verification from more comprehensive longitudinal studies in the future.
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Affiliation(s)
- Kok-Yong Chin
- Department of Pharmacology, Faculty of Medicine, Universiti Kebangsaan Malaysia
| | - Kok-Lun Pang
- Biomedical Science Programme, School of Diagnostic and Applied Health Sciences, Faculty of Health Sciences, Universiti Kebangsaan Malaysia
| | - Wun Fui Mark-Lee
- School of Chemical Sciences and Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia
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32
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Ke Q, Li L, Yao X, Lai X, Cai B, Chen H, Chen R, Zhai Z, Huang L, Li K, Hu A, Mao FF, Xiang AP, Tao L, Li W. Enhanced generation of human induced pluripotent stem cells by ectopic expression of Connexin 45. Sci Rep 2017; 7:458. [PMID: 28352086 PMCID: PMC5428559 DOI: 10.1038/s41598-017-00523-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Accepted: 03/03/2017] [Indexed: 12/11/2022] Open
Abstract
Somatic cells can be successfully reprogrammed into pluripotent stem cells by the ectopic expression of defined transcriptional factors. However, improved efficiency and better understanding the molecular mechanism underlying reprogramming are still required. In the present study, a scrape loading/dye transfer assay showed that human induced pluripotent stem cells (hiPSCs) contained functional gap junctions partially contributed by Connexin 45 (CX45). We then found CX45 was expressed in human embryonic stem cells (hESCs) and human dermal fibroblasts (hDFs) derived hiPSCs. Then we showed that CX45 was dramatically upregulated during the reprogramming process. Most importantly, the ectopic expression of CX45 significantly enhanced the reprogramming efficiency together with the Yamanaka factors (OCT4, SOX2, KLF4, cMYC - OSKM), whereas knockdown of endogenous CX45 expression significantly blocked cellular reprogramming and reduced the efficiency. Our further study demonstrated that CX45 overexpression or knockdown modulated the cell proliferation rate which was associated with the reprogramming efficiency. In conclusion, our data highlighted the critical role of CX45 in reprogramming and may increase the cell division rate and result in an accelerated kinetics of iPSCs production.
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Affiliation(s)
- Qiong Ke
- Program of Stem Cells and Regenerative Medicine, Affiliated Guangzhou Women and Children's Hospital, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510623, China.,Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, China.,Department of Biology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Li Li
- Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China.,Lung Biology Laboratory, Department of Medicine, Division of Pulmonary, Allergy and Critical Care, Columbia University Medical Center, New York, New York, 10032, USA
| | - Xin Yao
- Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Xingqiang Lai
- Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Bing Cai
- Guangdong Key Laboratory of Reproductive Medicine, Guangzhou, Guangdong, 510080, China
| | - Hong Chen
- Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Rui Chen
- Center for Reproductive Medicine, Key Laboratory for Reproductive Medicine of Guangdong Province, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510140, China
| | - Zhichen Zhai
- Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Lihua Huang
- Program of Stem Cells and Regenerative Medicine, Affiliated Guangzhou Women and Children's Hospital, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510623, China
| | - Kai Li
- Department of Ultrasound, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510632, China
| | - Anbin Hu
- Department of General Surgery, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510080, China
| | - Frank Fuxiang Mao
- State Key Laboratory of Ophthalmology, Zhong Shan Ophthalmic Center, Sun Yat-sen University, Guangzhou, 510060, China
| | - Andy Peng Xiang
- Program of Stem Cells and Regenerative Medicine, Affiliated Guangzhou Women and Children's Hospital, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510623, China.,Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, China.,Guangdong Key Laboratory of Reproductive Medicine, Guangzhou, Guangdong, 510080, China.,Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Liang Tao
- Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China.
| | - Weiqiang Li
- Program of Stem Cells and Regenerative Medicine, Affiliated Guangzhou Women and Children's Hospital, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510623, China. .,Center for Stem Cell Biology and Tissue Engineering, Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Sun Yat-Sen University, Guangzhou, 510080, China. .,Department of Biochemistry, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China.
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33
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Li G, Xu Z, Hou L, Li X, Li X, Yuan W, Polat M, Chang S. Differential effects of bisphenol A diglicydyl ether on bone quality and marrow adiposity in ovary-intact and ovariectomized rats. Am J Physiol Endocrinol Metab 2016; 311:E922-E927. [PMID: 27756728 DOI: 10.1152/ajpendo.00267.2016] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Revised: 10/05/2016] [Accepted: 10/05/2016] [Indexed: 11/22/2022]
Abstract
Bisphenol A diglycidyl ether (BADGE), a PPARγ2 antagonist, has been shown to inhibit marrow adipogenesis and promote bone formation in intact animals. We investigated the impact of BADGE on a new and more clinically relevant physiological model, the ovariectomized (OVX) rat model. Forty female Wistar rats were divided into four treatment groups for 12 wk (n = 10/group): sham+vehicle, sham+BADGE, OVX+vehicle, and OVX+BADGE. Postmortem analyses included MRI, micro-CT, serological test, histomorphometry, biomechanical tests, RT-PCR, and Western blot. Overall, OVX induced a sequential marrow fat expansion accompanied by bone deterioration. Compared with OVX controls, BADGE reduced fat fraction of the distal femur by 36.3%, adipocyte density by 33.0%, adipocyte size by 28.6%, adipocyte volume percentage by 57.8%, and adipogenic markers PPARγ2 and C/EBPα by ∼50% in OVX rats. Similar results were observed in sham rats vs. vehicle. BADGE could promote bone quality in sham rats; however, BADGE did not significantly improve trabecular microarchitecture, biomechanical strength, and dynamic histomorphometric parameters except for trabecular separation in OVX rats. We concluded that early BADGE treatment at a dose of 30 mg/kg attenuates marrow adiposity in ovary-intact and OVX rats and stimulates bone formation in ovary-intact rats but does not significantly rescue bone quality in OVX rats.
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Affiliation(s)
- Guanwu Li
- Department of Radiology, Yueyang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China;
| | - Zheng Xu
- Xinzhuang Community Health Center, Shanghai, China
| | - Lingmi Hou
- Affiliated Hospital of North Sichuan Medical College, Sichuan, China
| | - Xuefeng Li
- Department of Radiology, Yueyang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xin Li
- Department of Gerontology, Yueyang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Wei Yuan
- Department of Spinal Disease Unit, Yueyang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China; and
| | - Maki Polat
- School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin
| | - Shixin Chang
- Department of Radiology, Yueyang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
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Nestin regulates neural stem cell migration via controlling the cell contractility. Int J Biochem Cell Biol 2016; 78:349-360. [PMID: 27477313 DOI: 10.1016/j.biocel.2016.07.034] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Revised: 07/11/2016] [Accepted: 07/28/2016] [Indexed: 12/17/2022]
Abstract
Neural stem cells (NSCs) migration is essential for neurogenesis and neuroregeneration after brain injury. Nestin, a widely used marker of NSCs, is expressed abundantly in several cancers, where it may correlate with tumor migration and invasion. However, it is not yet known whether nestin participates in NSC migration. Here, we show that nestin down-regulation significantly inhibits the migration and contraction of murine neural stem cells, but does not obviously influence the proliferation, filamentous actin (F-actin) content, distribution or focal adhesion assembly of these cells. Mechanistically, nestin knockdown was found to affect the phosphorylation state of myosin regulatory light chain (MRLC) and regulate the activity of myosin light chain kinase (MLCK). Co-immunoprecipitation experiments showed that it interacts with MLCK and MRLC. Together, our results indicate that nestin may increase NSC motility via elevating MLCK activity through direct binding and provide new insight into the roles of nestin in NSC migration and repair.
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35
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Simann M, Le Blanc S, Schneider V, Zehe V, Lüdemann M, Schütze N, Jakob F, Schilling T. Canonical FGFs Prevent Osteogenic Lineage Commitment and Differentiation of Human Bone Marrow Stromal Cells Via ERK1/2 Signaling. J Cell Biochem 2016; 118:263-275. [PMID: 27305863 DOI: 10.1002/jcb.25631] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Accepted: 06/14/2016] [Indexed: 12/21/2022]
Abstract
Controlling the adipo-osteogenic lineage decision of trabecular human bone marrow stromal cells (hBMSCs) in favor of osteogenesis represents a promising approach for osteoporosis therapy and prevention. Previously, Fibroblast Growth Factor 1 (FGF1) and its subfamily member FGF2 were scored as leading candidates to exercise control over skeletal precursor commitment and lineage decision albeit literature results are highly inconsistent. We show here that FGF1 and 2 strongly prevent the osteogenic commitment and differentiation of hBMSCs. Mineralization of extracellular matrix (ECM) and mRNA expression of osteogenic marker genes Alkaline Phosphatase (ALP), Collagen 1A1 (COL1A1), and Integrin-Binding Sialoprotein (IBSP) were significantly reduced. Furthermore, master regulators of osteogenic commitment like Runt-Related Transcription Factor 2 (RUNX2) and Bone Morphogenetic Protein 4 (BMP4) were downregulated. When administered under adipogenic culture conditions, canonical FGFs did not support osteogenic marker expression. Moreover despite the presence of osteogenic differentiation factors, FGFs even disabled the pro-osteogenic lineage decision of pre-differentiated adipocytic cells. In contrast to FGF Receptor 2 (FGFR2), FGFR1 was stably expressed throughout osteogenic and adipogenic differentiation and FGF addition. Moreover, FGFR1 and Extracellular Signal-Regulated Kinases 1 and 2 (ERK1/2) were found to be responsible for underlying signal transduction using respective inhibitors. Taken together, we present new findings indicating that canonical FGFR-ERK1/2 signaling entrapped hBMSCs in a pre-committed state and arrested further maturation of committed precursors. Our results might aid in unraveling and controlling check points relevant for ageing-associated aberrant adipogenesis with consequences for the treatment of degenerative diseases such as osteoporosis and for skeletal tissue engineering strategies. J. Cell. Biochem. 118: 263-275, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Meike Simann
- Department of Orthopedics, Orthopedic Center for Musculoskeletal Research, University of Würzburg, Würzburg, Germany
| | - Solange Le Blanc
- Department of Orthopedics, Orthopedic Center for Musculoskeletal Research, University of Würzburg, Würzburg, Germany
| | - Verena Schneider
- Chair Tissue Engineering & Regenerative Medicine, University Hospital Würzburg, Würzburg, Germany
| | - Viola Zehe
- Department of Orthopedics, Orthopedic Center for Musculoskeletal Research, University of Würzburg, Würzburg, Germany
| | - Martin Lüdemann
- Orthopedic Department König-Ludwig-Haus, Center for Musculoskeletal Research, University of Würzburg, Würzburg, Germany
| | - Norbert Schütze
- Department of Orthopedics, Orthopedic Center for Musculoskeletal Research, University of Würzburg, Würzburg, Germany
| | - Franz Jakob
- Department of Orthopedics, Orthopedic Center for Musculoskeletal Research, University of Würzburg, Würzburg, Germany
| | - Tatjana Schilling
- Department of Orthopedics, Orthopedic Center for Musculoskeletal Research, University of Würzburg, Würzburg, Germany
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36
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Almalki SG, Agrawal DK. Key transcription factors in the differentiation of mesenchymal stem cells. Differentiation 2016; 92:41-51. [PMID: 27012163 DOI: 10.1016/j.diff.2016.02.005] [Citation(s) in RCA: 275] [Impact Index Per Article: 34.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 02/15/2016] [Accepted: 02/25/2016] [Indexed: 11/15/2022]
Abstract
Mesenchymal stem cells (MSCs) are multipotent cells that represent a promising source for regenerative medicine. MSCs are capable of osteogenic, chondrogenic, adipogenic and myogenic differentiation. Efficacy of differentiated MSCs to regenerate cells in the injured tissues requires the ability to maintain the differentiation toward the desired cell fate. Since MSCs represent an attractive source for autologous transplantation, cellular and molecular signaling pathways and micro-environmental changes have been studied in order to understand the role of cytokines, chemokines, and transcription factors on the differentiation of MSCs. The differentiation of MSC into a mesenchymal lineage is genetically manipulated and promoted by specific transcription factors associated with a particular cell lineage. Recent studies have explored the integration of transcription factors, including Runx2, Sox9, PPARγ, MyoD, GATA4, and GATA6 in the differentiation of MSCs. Therefore, the overexpression of a single transcription factor in MSCs may promote trans-differentiation into specific cell lineage, which can be used for treatment of some diseases. In this review, we critically discussed and evaluated the role of transcription factors and related signaling pathways that affect the differentiation of MSCs toward adipocytes, chondrocytes, osteocytes, skeletal muscle cells, cardiomyocytes, and smooth muscle cells.
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Affiliation(s)
- Sami G Almalki
- Departments of Biomedical Sciences, Creighton University School of Medicine, Omaha, NE, USA
| | - Devendra K Agrawal
- Clinical and Translational Science, Creighton University School of Medicine, Omaha, NE, USA.
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37
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Zhai L, Sun N, Zhang B, Liu ST, Zhao Z, Jin HC, Ma XL, Xing GY. Effects of Focused Extracorporeal Shock Waves on Bone Marrow Mesenchymal Stem Cells in Patients with Avascular Necrosis of the Femoral Head. ULTRASOUND IN MEDICINE & BIOLOGY 2016; 42:753-762. [PMID: 26674675 DOI: 10.1016/j.ultrasmedbio.2015.10.021] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Revised: 10/09/2015] [Accepted: 10/26/2015] [Indexed: 06/05/2023]
Abstract
To observe the effect of extracorporeal shock waves (ESWs) on bone marrow mesenchymal stem cells (MSCs) in patients with avascular necrosis of the femoral head, we collected bone marrow donated by patients and then cultivated and passaged MSCs in vitro using density gradient centrifugation combined with adherence screening methods. The P3 generation MSCs were divided into the ESW group and the control group. The cell counting kit for MSCs detected some proliferation differences. Cytochemistry, alkaline phosphatase staining and Alizarin red staining were used to determine alkaline phosphatase content. Simultaneously, real-time polymerase factor α1, osteocalcin and peroxisome proliferator-activated receptor γ. Together, the results of our study first indicate that moderate ESW intensity, which is instrumental in enhancing MSC proliferation, inducing conversion of MSCs into osteoblasts, and inhibiting differentiation of MSCs into adipocytes from MSCs, is one of the effective mechanisms for treating avascular necrosis of the femoral head.
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Affiliation(s)
- Lei Zhai
- Department of Orthopaedic Surgery, The Affiliated Hospital of Logistics College of Chinese People's Armed Police Force, Hedong District, Tianjin 300162, P. R. China; Department of Orthopaedic Surgery, The General Hospital of Tianjin Medical University, Heping District, Tianjin 300052, P. R. China
| | - Nan Sun
- Department of Nephropathy, The Affiliated Hospital of Logistics College of Chinese People's Armed Police Force, Hedong District, Tianjin 300162, P. R. China
| | - Bo Zhang
- Department of Immunology, Tianjin Key Laboratory of Cellular and Molecular Immunology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China
| | - Shui-Tao Liu
- Department of Orthopaedic Surgery, The General Hospital of Tianjin Medical University, Heping District, Tianjin 300052, P. R. China
| | - Zhe Zhao
- Department of Orthopaedic Surgery, The General Hospital of Chinese People's Armed Police Force, Haidian District, Beijing 100039, P. R. China
| | - Hai-Chao Jin
- Department of Orthopaedic Surgery, The General Hospital of Tianjin Medical University, Heping District, Tianjin 300052, P. R. China
| | - Xin-Long Ma
- Department of Orthopaedic Surgery, Tianjin Hospital, No 406 Jiefang Nan Road, Hexi District, Tianjin 300211, P. R. China
| | - Geng-Yan Xing
- Department of Orthopaedic Surgery, The General Hospital of Chinese People's Armed Police Force, Haidian District, Beijing 100039, P. R. China.
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Chung JE, Park JH, Yun JW, Kang YH, Park BW, Hwang SC, Cho YC, Sung IY, Woo DK, Byun JH. Cultured Human Periosteum-Derived Cells Can Differentiate into Osteoblasts in a Perioxisome Proliferator-Activated Receptor Gamma-Mediated Fashion via Bone Morphogenetic Protein signaling. Int J Med Sci 2016; 13:806-818. [PMID: 27877072 PMCID: PMC5118751 DOI: 10.7150/ijms.16484] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Accepted: 09/13/2016] [Indexed: 01/02/2023] Open
Abstract
The differentiation of mesenchymal stem cells towards an osteoblastic fate depends on numerous signaling pathways, including activation of bone morphogenetic protein (BMP) signaling components. Commitment to osteogenesis is associated with activation of osteoblast-related signal transduction, whereas inactivation of this signal transduction favors adipogenesis. BMP signaling also has a critical role in the processes by which mesenchymal stem cells undergo commitment to the adipocyte lineage. In our previous study, we demonstrated that an agonist of the perioxisome proliferator-activated receptor γ (PPARγ), a master regulator of adipocyte differentiation, stimulates osteoblastic differentiation of cultured human periosteum-derived cells. In this study, we used dorsomorphin, a selective small molecule inhibitor of BMP signaling, to investigate whether BMP signaling is involved in the positive effects of PPARγ agonists on osteogenic phenotypes of cultured human periosteum-derived cells. Both histochemical detection and bioactivity of ALP were clearly increased in the periosteum-derived cells treated with the PPARγ agonist at day 10 of culture. Treatment with the PPARγ agonist also caused an increase in alizarin red S staining and calcium content in the periosteum-derived osteoblasts at 2 and 3 weeks of culture. In contrast, dorsomorphin markedly decreased ALP activity, alizarin red S staining and calcium content in both the cells treated with PPARγ agonist and the cells cultured in osteogenic induction media without PPARγ agonist during the culture period. In addition, the PPARγ agonist clearly increased osteogenic differentiation medium-induced BMP-2 upregulation in the periosteum-derived osteoblastic cells at 2 weeks of culture as determined by quantitative reverse transcriptase polymerase chain reaction (RT-PCR), immunoblotting, and immunocytochemical analyses. Although further study will be needed to clarify the mechanisms of PPARγ-regulated osteogenesis, our results suggest that the positive effects of a PPARγ agonist on the osteogenic phenotypes of cultured human periosteum-derived cells seem to be dependent on BMP signaling.
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Affiliation(s)
- Jin-Eun Chung
- Department of Oral and Maxillofacial Surgery, Gyeongsang National University School of Medicine and Gyeongsang National University Hospital, Institute of Health Sciences, Gyeongsang National University, Jinju 660-702, Republic of Korea
| | - Jin-Ho Park
- Department of Oral and Maxillofacial Surgery, Gyeongsang National University School of Medicine and Gyeongsang National University Hospital, Institute of Health Sciences, Gyeongsang National University, Jinju 660-702, Republic of Korea
| | - Jeong-Won Yun
- Department of Oral and Maxillofacial Surgery, Gyeongsang National University School of Medicine and Gyeongsang National University Hospital, Institute of Health Sciences, Gyeongsang National University, Jinju 660-702, Republic of Korea
| | - Young-Hoon Kang
- Department of Oral and Maxillofacial Surgery, Gyeongsang National University School of Medicine and Gyeongsang National University Hospital, Institute of Health Sciences, Gyeongsang National University, Jinju 660-702, Republic of Korea
| | - Bong-Wook Park
- Department of Oral and Maxillofacial Surgery, Gyeongsang National University School of Medicine and Gyeongsang National University Hospital, Institute of Health Sciences, Gyeongsang National University, Jinju 660-702, Republic of Korea
| | - Sun-Chul Hwang
- Department of Orthopaedic Surgery, Institute of Health Sciences, Gyeongsang National University School of Medicine, Jinju, Republic of Korea
| | - Yeong-Cheol Cho
- Department of Oral and Maxillofacial Surgery, College of Medicine, Ulsan University Hospital, University of Ulsan, Ulsan, Republic of Korea
| | - Iel-Yong Sung
- Department of Oral and Maxillofacial Surgery, College of Medicine, Ulsan University Hospital, University of Ulsan, Ulsan, Republic of Korea
| | - Dong Kyun Woo
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Gyeongsang National University, Jinju, Republic of Korea
| | - June-Ho Byun
- Department of Oral and Maxillofacial Surgery, Gyeongsang National University School of Medicine and Gyeongsang National University Hospital, Institute of Health Sciences, Gyeongsang National University, Jinju 660-702, Republic of Korea
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A Member of the Nuclear Receptor Superfamily, Designated as NR2F2, Supports the Self-Renewal Capacity and Pluripotency of Human Bone Marrow-Derived Mesenchymal Stem Cells. Stem Cells Int 2015; 2016:5687589. [PMID: 26783404 PMCID: PMC4691491 DOI: 10.1155/2016/5687589] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Revised: 08/11/2015] [Accepted: 08/12/2015] [Indexed: 12/25/2022] Open
Abstract
Mesenchymal stem cells are characterized with self-renewal capacity and pluripotency. NR2F2 is a nuclear receptor that has been detected in the mesenchymal compartment of developing organs. However, whether NR2F2 plays a role in the stemness maintenance of mesenchymal stem cells has not been explored yet. In this study, we investigated the function of NR2F2 in bone marrow-derived mesenchymal stem cells via shRNA-mediated knock-down of NR2F2. The suppression of NR2F2 impaired the colony-forming efficacy of mesenchymal stem cells. The inhibition of colony-forming capacity may be attributed to the acceleration of senescence through upregulation of P21 and P16. The downregulation of NR2F2 also suppressed both osteogenic and adipogenic differentiation processes. In conclusion, NR2F2 plays an important role in the stemness maintenance of bone marrow-derived mesenchymal stem cells.
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Anti-adipogenic effects of sesamol on human mesenchymal stem cells. Biochem Biophys Res Commun 2015; 469:49-54. [PMID: 26616060 DOI: 10.1016/j.bbrc.2015.11.070] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Accepted: 11/16/2015] [Indexed: 01/09/2023]
Abstract
Human mesenchymal stem cells (hMSCs) from adult bone marrow are able to differentiate into adipocytes, osteoblasts, chondrocytes and neuronal cells. Adipocytes in bone marrow are primarily responsible for the maintenance of bone structure by maintaining cell number balance with other stromal cells. However, the number of adipocytes in the bone marrow increases with age, leading to an imbalance of the bone marrow microenvironment, which results in a disruption of bone structure. In addition, the excessive number of adipocytes in bone marrow can cause diseases, such as osteoporosis or anemia. In this study, we investigated the effect of sesamol, a major natural phenolic compound of sesame oil, on the adipogenic differentiation of hMSCs. Numerous studies have reported the anti-oxidant property of sesamol, but its effect on cell differentiation has not yet been shown. We first found that sesamol treatment during adipogenic differentiation of hMSCs reduced intracellular lipid accumulation, which was unrelated to lipolysis. Interestingly, sesamol diminished the expression of genes responsible for adipogenesis, but increased the expression of osteogenic genes. In addition, sesamol decreased the expression of genes necessary for adipocyte maturation without affecting the expression of hMSC-specific genes. Studies concerning intracellular signaling in hMSCs showed that the extracellular signal-regulated kinase 1/2 (ERK1/2) was decreased by sesamol, which was similar with the effect of an ERK1/2 inhibitor. Overall, this study demonstrates that sesamol can attenuate the adipogenic differentiation of hMSCs without affecting its characteristics through the inhibition of ERK1/2 pathway. Herein, this study reports for the first time the effect of sesamol on hMSC differentiation and suggests the possibility of using sesamol as a therapeutic agent to treat intraosseous disruption triggered by the excessive adipogenesis of hMSCs.
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Synergistic Effects of BMP9 and miR-548d-5p on Promoting Osteogenic Differentiation of Mesenchymal Stem Cells. BIOMED RESEARCH INTERNATIONAL 2015; 2015:309747. [PMID: 26609524 PMCID: PMC4644537 DOI: 10.1155/2015/309747] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Accepted: 06/17/2015] [Indexed: 01/13/2023]
Abstract
Various stimulators have been reported to promote MSC osteogenic differentiation via different pathways such as bone morphogenetic protein 9 (BMP9) through influencing COX-2 and miR-548d-5p through targeting peroxisome proliferator-activated receptor-γ (PPARγ). Whether synergistic effects between BMP9 and miR-548d-5p existed in promoting osteogenesis from MSCs was unclear. In the study, the potential synergistic effects of BMP9 and miR-548d-5p on human MSC differentiation were investigated. Osteogenic differentiation of MSCs treated with BMP9 or miR-548d-5p was detected with multimodality of methods. The results demonstrated that BMP9 and miR-548d-5p significantly influenced COX-2 and PPARγ, respectively. BMP9 also influenced the expression of PPARγ, but no significant effect of miR-548d-5p on COX-2 was observed. When BMP9 and miR-548d-5p were combined, more potent effects on both COX-2 and PPARγ were observed than BMP9 or miR-548d-5p alone. Consistently, osteogenic analysis at different timepoints demonstrated that osteogenic genes, ALP activity, calcium deposition, OPN protein, and matrix mineralization were remarkably upregulated by BMP9/miR-548d-5p compared with BMP9 or miR-548d-5p alone, indicating the synergetic effects of BMP9 and miR-548d-5p on osteogenic differentiation of MSCs. Our study demonstrated that regulating different osteogenic regulators may be an effective strategy to promote bone tissue regeneration for bone defects.
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Erndt-Marino JD, Munoz-Pinto DJ, Samavedi S, Jimenez-Vergara AC, Diaz-Rodriguez P, Woodard L, Zhang D, Grunlan MA, Hahn MS. Evaluation of the Osteoinductive Capacity of Polydopamine-Coated Poly( ε-caprolactone) Diacrylate Shape Memory Foams. ACS Biomater Sci Eng 2015; 1:1220-1230. [PMID: 33304994 DOI: 10.1021/acsbiomaterials.5b00445] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Recently, a novel shape memory polymer foam based on the photopolymerization of poly(ε-caprolactone) diacrylate (PCLDA) has been developed. These PCLDA foams enter a temporary softened state when briefly treated with warm saline (T saline > T m of PCLDA), allowing them to conform to irregular bone defect "boundaries" prior to shape setting. When coated with a mechanically stable polydopamine (PD) layer, these PCLDA foams have previously been demonstrated to induce hydroxyapatite deposition. In the present study, the osteoinductivity of these "self-fitting" PD-coated PCLDA (PD-PCLDA) materials was evaluated relative to uncoated PCLDA (U-PCLDA) controls using bone marrow-derived human mesenchymal stem cells (h-MSCs). When cultured in the absence of osteogenic media supplements, PD-PCLDA scaffolds expressed similar levels of Runx2, alkaline phosphatase, and osteopontin protein as U-PCLDA scaffolds cultured in the presence of osteogenic media supplements. In addition, PD-PCLDA scaffolds cultured without osteogenic supplements did not significantly promote undesired lineage progression (e.g., adipogenesis or chondrogenesis) of h-MSCs. Cumulatively, these data indicate that PD-PCLDA materials display increased osteoinductivity relative to U-PCLDA substrates. Future studies will examine tethered osteogenic factors or peptides toward augmenting the osteoinductive properties of the PD-PCLDA foams.
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Affiliation(s)
- Joshua D Erndt-Marino
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Dany J Munoz-Pinto
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Satyavrata Samavedi
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Andrea C Jimenez-Vergara
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Patricia Diaz-Rodriguez
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Lindsay Woodard
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Dawei Zhang
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Melissa A Grunlan
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843, United States.,Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Mariah S Hahn
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
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Islam MS, Stemig ME, Takahashi Y, Hui SK. Radiation response of mesenchymal stem cells derived from bone marrow and human pluripotent stem cells. JOURNAL OF RADIATION RESEARCH 2015; 56:269-277. [PMID: 25425005 PMCID: PMC4380046 DOI: 10.1093/jrr/rru098] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Revised: 08/30/2014] [Accepted: 09/29/2014] [Indexed: 06/04/2023]
Abstract
Mesenchymal stem cells (MSCs) isolated from human pluripotent stem cells are comparable with bone marrow-derived MSCs in their function and immunophenotype. The purpose of this exploratory study was comparative evaluation of the radiation responses of mesenchymal stem cells derived from bone marrow- (BMMSCs) and from human embryonic stem cells (hESMSCs). BMMSCs and hESMSCs were irradiated at 0 Gy (control) to 16 Gy using a linear accelerator commonly used for cancer treatment. Cells were harvested immediately after irradiation, and at 1 and 5 days after irradiation. Cell cycle analysis, colony forming ability (CFU-F), differentiation ability, and expression of osteogenic-specific runt-related transcription factor 2 (RUNX2), adipogenic peroxisome proliferator-activated receptor gamma (PPARγ), oxidative stress-specific dismutase-1 (SOD1) and Glutathione peroxidase (GPX1) were analyzed. Irradiation arrested cell cycle progression in BMMSCs and hESMSCs. Colony formation ability of irradiated MSCs decreased in a dose-dependent manner. Irradiated hESMSCs showed higher adipogenic differentiation compared with BMMSCs, together with an increase in the adipogenic PPARγ expression. PPARγ expression was upregulated as early as 4 h after irradiation, along with the expression of SOD1. More than 70% downregulation was found in Wnt3A, Wnt4, Wnt 7A, Wnt10A and Wnt11 in BMMSCs, but not in hESMSCs. hESMSCs are highly proliferative but radiosensitive compared with BMMSCs. Increased PPARγ expression relative to RUNX2 and downregulation of Wnt ligands in irradiated MSCs suggest Wnt mediated the fate determination of irradiated MSCs.
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Affiliation(s)
- Mohammad S Islam
- School of Dentistry, University of Minnesota, 420 Delaware Street SE, Mayo Mail Code 494, Minneapolis, MN 55455, USA
| | - Melissa E Stemig
- School of Dentistry, University of Minnesota, 420 Delaware Street SE, Mayo Mail Code 494, Minneapolis, MN 55455, USA
| | - Yutaka Takahashi
- Masonic Cancer Center, University of Minnesota, 420 Delaware Street SE, Mayo Mail Code 494, Minneapolis, MN 55455, USA
| | - Susanta K Hui
- Masonic Cancer Center, University of Minnesota, 420 Delaware Street SE, Mayo Mail Code 494, Minneapolis, MN 55455, USA Department of Therapeutic Radiology, University of Minnesota, 420 Delaware Street SE, Mayo Mail Code 494, Minneapolis, MN 55455, USA
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Zhao XY, Chen XY, Zhang ZJ, Kang Y, Liao WM, Yu WH, Xiang AP. Expression patterns of transcription factor PPARγ and C/EBP family members during in vitro adipogenesis of human bone marrow mesenchymal stem cells. Cell Biol Int 2015; 39:457-65. [PMID: 25523390 DOI: 10.1002/cbin.10415] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Accepted: 12/13/2014] [Indexed: 12/17/2022]
Affiliation(s)
- Xiao-Yi Zhao
- Department of Orthopedics; First Affiliated Hospital of Sun Yat-sen University; Guangzhou 510080 Guangdong China
| | - Xiao-Yong Chen
- Center for Stem Cell Biology and Tissue Engineering; The Key Laboratory for Stem Cells and Tissue Engineering; Ministry of Education; Sun Yat-Sen University; Guangzhou 510080 Guangdong China
| | - Zi-Ji Zhang
- Department of Orthopedics; First Affiliated Hospital of Sun Yat-sen University; Guangzhou 510080 Guangdong China
| | - Yan Kang
- Department of Orthopedics; First Affiliated Hospital of Sun Yat-sen University; Guangzhou 510080 Guangdong China
| | - Wei-Ming Liao
- Department of Orthopedics; First Affiliated Hospital of Sun Yat-sen University; Guangzhou 510080 Guangdong China
| | - Wei-Hua Yu
- Center for Stem Cell Biology and Tissue Engineering; The Key Laboratory for Stem Cells and Tissue Engineering; Ministry of Education; Sun Yat-Sen University; Guangzhou 510080 Guangdong China
| | - Andy Peng Xiang
- Center for Stem Cell Biology and Tissue Engineering; The Key Laboratory for Stem Cells and Tissue Engineering; Ministry of Education; Sun Yat-Sen University; Guangzhou 510080 Guangdong China
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Biver G, Wang N, Gartland A, Orriss I, Arnett TR, Boeynaems JM, Robaye B. Role of the P2Y13 receptor in the differentiation of bone marrow stromal cells into osteoblasts and adipocytes. Stem Cells 2015; 31:2747-58. [PMID: 23629754 DOI: 10.1002/stem.1411] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Revised: 03/07/2013] [Accepted: 03/26/2013] [Indexed: 12/16/2022]
Abstract
Accumulating evidence indicates that extracellular nucleotides, signaling through purinergic receptors, play a significant role in bone remodeling. Mesenchymal stem cells (MSCs) express functional P2Y receptors whose expression level is regulated during osteoblast or adipocyte differentiation. P2Y13 -deficient mice were previously shown to exhibit a decreased bone turnover associated with a reduction in the number of both osteoblasts and osteoclasts on the bone surfaces. We therefore examined whether P2Y13 R activation was involved in the osteogenic differentiation of MSC. Our study demonstrated that ADP stimulation of P2Y13 R(+/+) (but not P2Y13 R(-/-) ) adherent bone marrow stromal cells (BMSCs) increased significantly the formation of alkaline phosphatase-colony-forming units (CFU-ALP) as well as the expression of osteoblastic markers (osterix, alkaline phosphatase, and collagen I) involved in the maturation of preosteoblasts into osteoblasts. The number of CFU-ALP obtained from P2Y13 R(-/-) BMSC and the level of osteoblastic gene expression after osteogenic stimulation were strongly reduced compared to those obtained in wild-type cell cultures. In contrast, when P2Y13 R(-/-) BMSCs were incubated in an adipogenic medium, the number of adipocytes generated and the level of adipogenic gene expression (PPARγ2 and Adipsin) were higher than those obtained in P2Y13 R(+/+) MSC. Interestingly, we observed a significant increase of the number of bone marrow adipocytes in tibia of P2Y13 R(-/-) mice. In conclusion, our findings indicate that the P2Y13 R plays an important role in the balance of osteoblast and adipocyte terminal differentiation of bone marrow progenitors. Therefore, the P2Y13 receptor can be considered as a new pharmacological target for the treatment of bone diseases like osteoporosis. STEM Cells 2013;31:2747-2758.
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Affiliation(s)
- Galadrielle Biver
- Institute of Interdisciplinary Research, Institut de Recherche Interdisciplinaire en Biologie Humaine et Moléculaire, Université Libre de Bruxelles, Gosselies, Belgium
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Sun ZB, Wang JW, Xiao H, Zhang QS, Kan WS, Mo FB, Hu S, Ye SN. Icariin may benefit the mesenchymal stem cells of patients with steroid-associated osteonecrosis by ABCB1-promoter demethylation: a preliminary study. Osteoporos Int 2015; 26:187-97. [PMID: 25112719 DOI: 10.1007/s00198-014-2809-z] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Accepted: 07/02/2014] [Indexed: 12/25/2022]
Abstract
UNLABELLED In this study, we found out a previously undefined function of icariin which restored the dynamic balance between osteogenic and adipogenic differentiation of mesenchymal stem cells (MSCs) in patients with osteonecrosis of femoral head (ONFH) via ABCB1-promoter demethylation. These findings provided important information regarding potential implication of icariin targeting epigenetic changes for the treatment of steroid -associated ONFH. INTRODUCTION Here, we investigated whether icariin can also exert a beneficial role in the reactivation of MSCs in the patients with steroid-associated ONFH via ABCB1-promoter demethylation. METHODS Bone marrow was collected from the proximal femur in patients with steroid-associated ONFH (n = 20) and patients with new femoral neck fractures (n = 22), and then MSCs were isolated. We investigated cell viability, intracellular reactive oxygen species (ROS) level, mitochondrial membrane potential (MMP), P-glycoprotein (P-gp) activity, the transcript levels of ABCB1 and oxidative stress-related genes, methylation extent at CpG islands of ABCB1 promoter, and osteogenic and adipogenic differentiation ability of MSCs from the femoral neck fractures group and from the steroid-associated ONFH group treated with or without icariin. RESULTS We observed that MSCs from the steroid-associated ONFH group showed reduced proliferation ability, elevated ROS level, depressed MMP, weakened osteogenesis, and enhanced adipogenesis while low P-gp activity, transcription level of ABCB1, and oxidative stress-related genes as well as aberrant CpG islands hypermethylation of ABCB1 were also noted in steroid-associated ONFH group. Treatment with icariin obviously induced de novo P-gp expression, decreased oxidative stress, and promoted osteogenesis. CONCLUSION Icariin may be a potential drug targeting epigenetic changes for the treatment of steroid-associated ONFH.
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Affiliation(s)
- Z-B Sun
- Department of Orthopedics, Pu-Ai Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
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Piccinin MA, Khan ZA. Pathophysiological role of enhanced bone marrow adipogenesis in diabetic complications. Adipocyte 2014; 3:263-72. [PMID: 26317050 DOI: 10.4161/adip.32215] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2014] [Revised: 07/16/2014] [Accepted: 07/30/2014] [Indexed: 12/12/2022] Open
Abstract
Diabetes leads to complications in select organ systems primarily by disrupting the vasculature of the target organs. These complications include both micro- (cardiomyopathy, retinopathy, nephropathy, and neuropathy) and macro-(atherosclerosis) angiopathies. Bone marrow angiopathy is also evident in both experimental models of the disease as well as in human diabetes. In addition to vascular disruption, bone loss and increased marrow adiposity have become hallmarks of the diabetic bone phenotype. Emerging evidence now implicates enhanced marrow adipogenesis and changes to cellular makeup of the marrow in a novel mechanistic link between various secondary complications of diabetes. In this review, we explore the mechanisms of enhanced marrow adipogenesis in diabetes and the link between changes to marrow cellular composition, and disruption and depletion of reparative stem cells.
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Granéli C, Karlsson C, Brisby H, Lindahl A, Thomsen P. The effects of PPAR-γ inhibition on gene expression and the progression of induced osteogenic differentiation of human mesenchymal stem cells. Connect Tissue Res 2014; 55:262-74. [PMID: 24708348 DOI: 10.3109/03008207.2014.910198] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Mesenchymal stem cells (MSCs) can differentiate into several cell types, such as osteoblasts and adipocytes, both in vitro and in vivo. Although these two differentiation pathways are distinct from each other, cross-communication between cells of the two lineages exists both systemically and peripherally in the tissue. The transcription factor PPAR-γ, the main switch in adipogenic differentiation of MSCs, has previously been described to have a negative effect on osteogenic differentiation. The aim of this study was to investigate the effect of PPAR-γ inhibition on osteogenic differentiation of human MSCs, in vitro. Extracellular matrix analysis and quantification of osteogenic markers, revealed how these cells respond when the adipogenic differentiation pathway is blocked during induction of osteogenic differentiation. The inhibition leads to a significant increase in mineralization of the extracellular matrix, as well as an increased activity or up-regulated gene expression of alkaline phosphatase, the key enzyme involved in matrix mineralization. Furthermore, it was also demonstrated by microarray analysis, that PPAR-γ inhibition during osteogenic induction leads to a significant up-regulation of a number of genes related to both osteogenesis and adipogenesis such as c10orf10, leptin, GDF5 and KLF15. In conclusion, inhibition of PPAR-γ during induction of osteogenesis leads to increased osteogenic differentiation of human MSCs.
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Affiliation(s)
- Cecilia Granéli
- Department of Biomaterials, Institute of Clinical Sciences, Sahlgrenska Academy at University of Gothenburg , Gothenburg , Sweden
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Yeh LCC, Ford JJ, Lee JC, Adamo ML. Palmitate attenuates osteoblast differentiation of fetal rat calvarial cells. Biochem Biophys Res Commun 2014; 450:777-81. [PMID: 24955854 DOI: 10.1016/j.bbrc.2014.06.063] [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: 06/04/2014] [Accepted: 06/12/2014] [Indexed: 10/25/2022]
Abstract
Aging is associated with the accumulation of ectopic lipid resulting in the inhibition of normal organ function, a phenomenon known as lipotoxicity. Within the bone marrow microenvironment, elevation in fatty acid levels may produce an increase in osteoclast activity and a decrease in osteoblast number and function, thus contributing to age-related osteoporosis. However, little is known about lipotoxic mechanisms in intramembraneous bone. Previously we reported that the long chain saturated fatty acid palmitate inhibited the expression of the osteogenic markers RUNX2 and osteocalcin in fetal rat calvarial cell (FRC) cultures. Moreover, the acetyl CoA carboxylase inhibitor TOFA blocked the inhibitory effect of palmitate on expression of these two markers. In the current study we have extended these observations to show that palmitate inhibits spontaneous mineralized bone formation in FRC cultures in association with reduced mRNA expression of RUNX2, alkaline phosphatase, osteocalcin, and bone sialoprotein and reduced alkaline phosphatase activity. The effects of palmitate on osteogenic marker expression were inhibited by TOFA. Palmitate also inhibited the mRNA expression of fatty acid synthase and PPARγ in FRC cultures, and as with osteogenic markers, this effect was inhibited by TOFA. Palmitate had no effect on FRC cell proliferation or apoptosis, but inhibited BMP-7-induced alkaline phosphatase activity. We conclude that palmitate accumulation may lead to lipotoxic effects on osteoblast differentiation and mineralization and that increases in fatty acid oxidation may help to prevent these lipotoxic effects.
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Affiliation(s)
- Lee-Chuan C Yeh
- Department of Biochemistry, The University of Texas Health Science Center at San Antonio, TX, United States
| | - Jeffery J Ford
- Department of Biochemistry, The University of Texas Health Science Center at San Antonio, TX, United States
| | - John C Lee
- Department of Biochemistry, The University of Texas Health Science Center at San Antonio, TX, United States; The Sam and Ann Barshop Institute for Longevity and Aging Studies, The University of Texas Health Science Center at San Antonio, TX, United States
| | - Martin L Adamo
- Department of Biochemistry, The University of Texas Health Science Center at San Antonio, TX, United States; The Sam and Ann Barshop Institute for Longevity and Aging Studies, The University of Texas Health Science Center at San Antonio, TX, United States.
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Sun H, Kim JK, Mortensen R, Mutyaba LP, Hankenson KD, Krebsbach PH. Osteoblast-targeted suppression of PPARγ increases osteogenesis through activation of mTOR signaling. Stem Cells 2014; 31:2183-92. [PMID: 23766271 DOI: 10.1002/stem.1455] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2012] [Revised: 05/03/2013] [Accepted: 05/21/2013] [Indexed: 01/21/2023]
Abstract
Nuclear receptor peroxisome proliferator-activated receptor-γ (PPARγ) is an essential transcription factor for adipocyte differentiation. In mesenchymal stem cells, PPARγ has been assumed to play a negative role in osteoblastic differentiation, by working in an adipogenesis dependent manner, due to the reciprocal relationship between osteoblast and adipocyte differentiation. However, the direct role of PPARγ in osteoblast function is not fully understood, due in part to inadequate model systems. Here, we describe an adenoviral-mediated PPARγ knockout system in which suppression of PPARγ in mesenchymal stem cells enhanced osteoblast differentiation and inhibited adipogenesis in vitro. Consistent with this in vitro observation, lipoatrophic A-ZIP/F1 mice, which do not form adipocytes, displayed a phenotype in which both cortical and trabecular bone was significantly increased compared with wild-type mice. We next developed an inducible osteoblast-targeted PPARγ knockout (Osx Cre/flox- PPARγ) mouse to determine the direct role of PPARγ in bone formation. Data from both in vitro cultures of mesenchymal stem cells and in vivo µCT analysis of bones suggest that suppression of PPARγ activity in osteoblasts significantly increased osteoblast differentiation and trabecular number. Endogenous PPARγ in mesenchymal stem cells and osteoblasts strongly inhibited Akt/mammalian target of rapamycin (mTOR)/p70S6k activity and led to decreased osteoblastic differentiation. Therefore, we conclude that PPARγ modulates osteoblast differentiation and bone formation through both direct and indirect mechanisms. The direct mode, as shown here, involves PPARγ regulation of the mTOR pathway, while the indirect pathway is dependent on the regulation of adipogenesis.
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Affiliation(s)
- Hongli Sun
- Department of Biologic and Materials Sciences, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
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