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Tang L, Zhang YY, Liu WJ, Fu Q, Zhao J, Liu YB. DNA methylation of promoter region inhibits galectin-1 expression in BMSCs of aged mice. Am J Physiol Cell Physiol 2024; 326:C429-C441. [PMID: 38105757 DOI: 10.1152/ajpcell.00334.2023] [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: 07/24/2023] [Revised: 12/01/2023] [Accepted: 12/14/2023] [Indexed: 12/19/2023]
Abstract
Senile osteoporosis increases fracture risks. Bone marrow stromal cells (BMSCs) are sensitive to aging. Deep insights into BMSCs aging are vital to elucidate the mechanisms underlying age-related bone loss. Recent advances showed that osteoporosis is associated with aberrant DNA methylation of many susceptible genes. Galectin-1 (Gal-1) has been proposed as a mediator of BMSCs functions. In our previous study, we showed that Gal-1 was downregulated in aged BMSCs and global deletion of Gal-1 in mice caused bone loss via impaired osteogenesis potential of BMSCs. Gal-1 promoter is featured by CpG islands. However, there are no reports concerning the DNA methylation status in Gal-1 promoter during osteoporosis. In the current study, we sought to investigate the role of DNA methylation in Gal-1 downregulation in aged BMSCs. The potential for anti-bone loss therapy based on modulating DNA methylation is explored. Our results showed that Dnmt3b-mediated Gal-1 promoter DNA hypermethylation plays an important role in Gal-1 downregulation in aged BMSCs, which inhibited β-catenin binding on Gal-1 promoter. Bone loss of aged mice was alleviated in response to in vivo deletion of Dnmt3b from BMSCs. Finally, when bone marrow of young wild-type (WT) mice or young Dnmt3bPrx1-Cre mice was transplanted into aged WT mice, Gal-1 level in serum and trabecular bone mass were elevated in recipient aged WT mice. Our study will benefit for deeper insights into the regulation mechanisms of Gal-1 expression in BMSCs during osteoporosis development, and for the discovery of new therapeutic targets for osteoporosis via modulating DNA methylation status.NEW & NOTEWORTHY There is Dnmt3b-mediated DNA methylation in Gal-1 promoter in aged bone marrow stromal cell (BMSC). DNA methylation causes Gal-1 downregulation and osteogenesis attenuation of aged BMSC. DNA methylation blocks β-catenin binding on Gal-1 promoter. Bone loss of aged mice is alleviated by in vivo deletion of Dnmt3b from BMSC.
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Affiliation(s)
- Liang Tang
- Department of Orthopedic Surgery, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Yang-Yang Zhang
- Department of Orthopedic Surgery, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Wen-Jun Liu
- Department of Orthopedic Surgery, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Qiang Fu
- Department of Orthopedics, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Jian Zhao
- Department of Orthopedics, Second Affiliated Hospital of Naval Medical University, Shanghai, People's Republic of China
| | - Yan-Bin Liu
- Department of Orthopedics, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
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Liu Z, Lu T, Ma L, Zhang Y, Li D. DNA demethylation of promoter region orchestrates SPI-1-induced ADAMTS-5 expression in articular cartilage of osteoarthritis mice. J Cell Physiol 2024; 239:e31170. [PMID: 38149721 DOI: 10.1002/jcp.31170] [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: 07/15/2023] [Revised: 11/19/2023] [Accepted: 11/30/2023] [Indexed: 12/28/2023]
Abstract
Osteoarthritis (OA) is one of the most prevalent joint diseases in aged people and characterized by articular cartilage degeneration, synovial inflammation, and abnormal bone remodeling. Recent advances in OA research have clearly shown that OA development is associated with aberrant DNA methylation status of many OA-related genes. As one of most important cartilage degrading proteases in OA, a disintegrin and metalloproteinase with thrombospondin motifs subtype 5 (ADAMTS-5) is activated to mediate cartilage degradation in human OA and experimental murine OA models. The pathological factors and signaling pathways mediating ADAMTS-5 activation during OA development are not well defined and have been a focus of intense research. ADAMTS-5 promoter is featured by CpG islands. So far there have been no reports concerning the DNA methylation status in ADAMTS-5 promoter during OA development. In this study, we sought to investigate DNA methylation status in ADAMTS-5 promoter, the role of DNA methylation in ADAMTS-5 activation in OA, and the underlying mechanisms. The potential for anti-OA intervention therapy which is based on modulating DNA methylation is also explored. Our results showed that DNA methyltransferases 1 (Dnmt1) downregulation-associated ADAMTS-5 promoter demethylation played an important role in ADAMTS-5 activation in OA, which facilitated SPI-1 binding on ADAMTS-5 promoter to activate ADAMTS-5 expression. More importantly, OA pathological phenotype of mice was alleviated in response to Dnmt1-induced DNA methylation of ADAMTS-5 promoter. Our study will benefit not only for deeper insights into the functional role and regulation mechanisms of ADAMTS-5 in OA, but also for the discovery of disease-modifying OA drugs on the basis of ADAMTS-5 via modulating DNA methylation status.
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Affiliation(s)
- Zhixin Liu
- Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, China
| | - Tongxin Lu
- Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, China
| | - Liang Ma
- Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, China
| | - Yuankai Zhang
- Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, China
| | - Deqiang Li
- Department of Orthopedics, Qilu Hospital of Shandong University, Jinan, China
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Yu D, Zhang S, Ma C, Huang S, Xu L, Liang J, Li H, Fan Q, Liu G, Zhai Z. CCL3 in the bone marrow microenvironment causes bone loss and bone marrow adiposity in aged mice. JCI Insight 2023; 8:159107. [PMID: 36378535 PMCID: PMC9870077 DOI: 10.1172/jci.insight.159107] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 11/09/2022] [Indexed: 11/16/2022] Open
Abstract
The central physiological role of the bone marrow renders bone marrow stromal cells (BMSCs) particularly sensitive to aging. With bone aging, BMSCs acquire a differentiation potential bias in favor of adipogenesis over osteogenesis, and the underlying molecular mechanisms remain unclear. Herein, we investigated the factors underlying age-related changes in the bone marrow and their roles in BMSCs' differentiation. Antibody array revealed that CC chemokine ligand 3 (CCL3) accumulation occurred in the serum of naturally aged mice along with bone aging phenotypes, including bone loss, bone marrow adiposity, and imbalanced BMSC differentiation. In vivo Ccl3 deletion could rescue these phenotypes in aged mice. CCL3 improved the adipogenic differentiation potential of BMSCs, with a positive feedback loop between CCL3 and C/EBPα. CCL3 activated C/EBPα expression via STAT3, while C/EBPα activated CCL3 expression through direct promoter binding, facilitated by DNA hypomethylation. Moreover, CCL3 inhibited BMSCs' osteogenic differentiation potential by blocking β-catenin activity mediated by ERK-activated Dickkopf-related protein 1 upregulation. Blocking CCL3 in vivo via neutralizing antibodies ameliorated trabecular bone loss and bone marrow adiposity in aged mice. This study provides insights regarding age-related bone loss and bone marrow adiposity pathogenesis and lays a foundation for the identification of new targets for senile osteoporosis treatment.
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Affiliation(s)
- Degang Yu
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Shuhong Zhang
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chao Ma
- Department of Orthopedics, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University; Xuzhou Central Hospital Affiliated to Nanjing University of Chinese Medicine, The Xuzhou School of Clinical Medicine of Nanjing Medical University; and Xuzhou Central Hospital Affiliated to Medical School of Southeast University, Xuzhou, China
| | - Sen Huang
- Department of Orthopedics, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University; Xuzhou Central Hospital Affiliated to Nanjing University of Chinese Medicine, The Xuzhou School of Clinical Medicine of Nanjing Medical University; and Xuzhou Central Hospital Affiliated to Medical School of Southeast University, Xuzhou, China
| | - Long Xu
- Department of Orthopedics, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University; Xuzhou Central Hospital Affiliated to Nanjing University of Chinese Medicine, The Xuzhou School of Clinical Medicine of Nanjing Medical University; and Xuzhou Central Hospital Affiliated to Medical School of Southeast University, Xuzhou, China
| | - Jun Liang
- Department of Orthopedics, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University; Xuzhou Central Hospital Affiliated to Nanjing University of Chinese Medicine, The Xuzhou School of Clinical Medicine of Nanjing Medical University; and Xuzhou Central Hospital Affiliated to Medical School of Southeast University, Xuzhou, China
| | - Huiwu Li
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qiming Fan
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Guangwang Liu
- Department of Orthopedics, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University; Xuzhou Central Hospital Affiliated to Nanjing University of Chinese Medicine, The Xuzhou School of Clinical Medicine of Nanjing Medical University; and Xuzhou Central Hospital Affiliated to Medical School of Southeast University, Xuzhou, China
| | - Zanjing Zhai
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Chen P, Hong W, Chen Z, Gordillo-Martinez F, Wang S, Fan H, Liu Y, Dai Y, Wang B, Jiang L, Yu H, He P. CCAAT/Enhancer-Binding Protein Alpha Is a Novel Regulator of Vascular Smooth Muscle Cell Osteochondrogenic Transition and Vascular Calcification. Front Physiol 2022; 13:755371. [PMID: 35295585 PMCID: PMC8918665 DOI: 10.3389/fphys.2022.755371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 01/10/2022] [Indexed: 11/13/2022] Open
Abstract
AimsVascular calcification is a common clinical complication of chronic kidney disease (CKD), atherosclerosis (AS), and diabetes, which is associated with increased cardiovascular morbidity and mortality in patients. The transdifferentiation of vascular smooth muscle cells (VSMCs) to an osteochondrogenic phenotype is a crucial step during vascular calcification. The transcription factor CCAAT/enhancer-binding protein alpha (C/EBPα) plays an important role in regulating cell proliferation and differentiation, but whether it regulates the calcification of arteries and VSMCs remains unclear. Therefore, this study aims to understand the role of C/EBPα in the regulation of vascular calcification.Methods and ResultsBoth mRNA and protein expression levels of C/EBPα were significantly increased in calcified arteries from mice treated with a high dose of vitamin D3 (vD3). Upregulation of C/EBPα was also observed in the high phosphate- and calcium-induced VSMC calcification process. The siRNA-mediated knockdown of C/EBPα significantly attenuated VSMC calcification in vitro. Moreover, C/EBPα depletion in VSMCs significantly reduced the mRNA expression of the osteochondrogenic genes, e.g., sex-determining region Y-box 9 (Sox9). C/EBPα overexpression can induce SOX9 overexpression. Similar changes in the protein expression of SOX9 were also observed in VSMCs after C/EBPα depletion or overexpression. In addition, silencing of Sox9 expression significantly inhibited the phosphate- and calcium-induced VSMC calcification in vitro.ConclusionFindings in this study indicate that C/EBPα is a key regulator of the osteochondrogenic transdifferentiation of VSMCs and vascular calcification, which may represent a novel therapeutic target for vascular calcification.
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Affiliation(s)
- Pengyuan Chen
- Department of Cardiology, Guangdong Provincial People’s Hospital’s Nanhai Hospital, The Second Hospital of Nanhai District Foshan City, Foshan, China
- Institute of Cardiovascular Disease, Guangdong Key Laboratory of Vascular Diseases, State Key Laboratory of Respiratory Disease, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Wanzi Hong
- Institute of Cardiovascular Disease, Guangdong Key Laboratory of Vascular Diseases, State Key Laboratory of Respiratory Disease, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
- School of Medicine, Guangdong Provincial People’s Hospital, South China University of Technology, Guangzhou, China
| | - Ziying Chen
- Department of Pathology, The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan People’s Hospital, Qingyuan, China
| | | | - Siying Wang
- Institute of Cardiovascular Disease, Guangdong Key Laboratory of Vascular Diseases, State Key Laboratory of Respiratory Disease, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Hualin Fan
- School of Medicine, Guangdong Provincial People’s Hospital, South China University of Technology, Guangzhou, China
| | - Yuanhui Liu
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Yining Dai
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Bo Wang
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Lei Jiang
- School of Medicine, Guangdong Provincial People’s Hospital, South China University of Technology, Guangzhou, China
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
- *Correspondence: Lei Jiang,
| | - Hongjiao Yu
- Department of Biochemistry and Molecular Biology, Guangzhou Medical University-Guangzhou Institutes of Biomedicine and Health Joint School of Life Sciences, Guangzhou Medical University, Guangzhou, China
- Hongjiao Yu,
| | - PengCheng He
- School of Medicine, Guangdong Provincial People’s Hospital, South China University of Technology, Guangzhou, China
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
- School of Medicine, The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China
- PengCheng He,
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Huang M, Liu H, Zhu L, Li X, Li J, Yang S, Liu D, Song X, Yokota H, Zhang P. Mechanical loading attenuates breast cancer-associated bone metastasis in obese mice by regulating the bone marrow microenvironment. J Cell Physiol 2021; 236:6391-6406. [PMID: 33554336 PMCID: PMC8222149 DOI: 10.1002/jcp.30314] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 01/21/2021] [Accepted: 01/25/2021] [Indexed: 12/12/2022]
Abstract
Breast cancer, a common malignancy for women, preferentially metastasizes to bone and obesity elevates the chance of its progression. While mechanical loading can suppress obesity and tumor-driven osteolysis, its effect on bone-metastasized obese mice has not been investigated. Here, we hypothesized that mechanical loading can lessen obesity-associated bone degradation in tumor-invaded bone by regulating the fate of bone marrow-derived cells. In this study, the effects of mechanical loading in obese mice were evaluated through X-ray imaging, histology, cytology, and molecular analyses. Tumor inoculation to the tibia elevated body fat composition, osteolytic lesions, and tibia destruction, and these pathologic changes were stimulated by the high-fat diet (HFD). However, mechanical loading markedly reduced these changes. It suppressed osteoclastogenesis by downregulating receptor activator of nuclear factor Kappa-B ligand and cathepsin K and promoted osteogenesis, which was associated with the upregulation of OPG and downregulation of C/enhancer-binding protein alpha and proliferator-activated receptor gamma for adipogenic differentiation. Furthermore, it decreased the levels of tumorigenic genes such as Rac1, MMP9, and interleukin 1β. In summary, this study demonstrates that although a HFD aggravates bone metastases associated with breast cancer, mechanical loading significantly protected tumor-invaded bone by regulating the fate of bone marrow-derived cells. The current study suggests that mechanical loading can provide a noninvasive, palliative option for alleviating breast cancer-associated bone metastasis, in particular for obese patients.
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Affiliation(s)
- Menglu Huang
- Department of Anatomy and Histology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
- Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Medical University, Tianjin 300070, China
| | - Hong Liu
- Department of Breast Surgery, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin 300060, China
- Key Laboratory of Cancer Prevention and Therapy, Tianjin 300060, China
- Tianjin’s Clinical Research Center for Cancer, Tianjin 300060, China
- Key Laboratory of Cancer Prevention and Therapy, Tianjin Medical University, Ministry of Education, Tianjin 300060, China
| | - Lei Zhu
- Key Laboratory of Cancer Prevention and Therapy, Tianjin 300060, China
- Department of Molecular Imaging and Nuclear Medicine, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin 300060, China
| | - Xinle Li
- Department of Anatomy and Histology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
- Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Medical University, Tianjin 300070, China
| | - Jie Li
- Department of Anatomy and Histology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
- Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Medical University, Tianjin 300070, China
| | - Shuang Yang
- Department of Anatomy and Histology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
- Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Medical University, Tianjin 300070, China
| | - Daquan Liu
- Department of Anatomy and Histology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
- Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Medical University, Tianjin 300070, China
| | - Xiaomeng Song
- Department of Anatomy and Histology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
| | - Hiroki Yokota
- Department of Biomedical Engineering, Indiana University-Purdue University Indianapolis, IN 46202, USA
| | - Ping Zhang
- Department of Anatomy and Histology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China
- Key Laboratory of Hormones and Development (Ministry of Health), Tianjin Key Laboratory of Metabolic Diseases, Tianjin Medical University, Tianjin 300070, China
- Department of Biomedical Engineering, Indiana University-Purdue University Indianapolis, IN 46202, USA
- Tianjin Key Laboratory of Spine and Spinal Cord, Tianjin Medical University, Tianjin 300052, China
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Xu W, Ni C, Wang Y, Zheng G, Zhang J, Xu Y. Age-related trabecular bone loss is associated with a decline in serum Galectin-1 level. BMC Musculoskelet Disord 2021; 22:394. [PMID: 33906620 PMCID: PMC8080405 DOI: 10.1186/s12891-021-04272-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Accepted: 04/16/2021] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Senile osteoporosis with age-related bone loss is diagnosed depending on radiographic changes of bone and bone mineral density (BMD) measurement. However, radiographic alterations are usually signs of medium-late stage osteoporosis. Therefore, biomarkers have been proposed as indicators of bone loss. In the current study, Galectin-1 (Gal-1) showed age-related decline in mice serum. The role of Gal-1 in osteoporosis has not been investigated so far. Hence, the current study illustrated the relationship of serum Gal-1 level with bone loss. METHODS We employed 6- and 18-month-old mice to establish an animal model of age-related trabecular bone loss, whose bone density and microstructure were investigated by micro-CT. ELISA was used to measure the levels of Gal-1 in serum. The correlation analysis was performed to illustrate the relationship between serum Gal-1 levels and trabecular bone loss. In addition, immunohistochemistry was used to investigate the abundance of Gal-1 in bone marrow of mice. ELISA and western blot were performed to measure the secretion ability and protein expression of Gal-1 in bone marrow stromal cells (BMSC), hematopoietic stem cells (HSC) and myeloid progenitor (MP) respectively. Flow cytometry was used to measure BMSC number in bone marrow. Finally, male volunteers with age-related BMD decrease were recruited and the relationship between serum Gal-1 and BMD was analyzed. RESULTS Gal-1 showed age-related decline in mice serum. Serum Gal-1 was positively associated with BV/TV of femur, tibia and L1 vertebrae in mice. BMSC secreted more Gal-1 compared with HSC and MP. BMSC number in bone marrow was significantly lower in aged mice compared with young mice. Significant attenuation of Gal-1 protein expression was observed in BMSC and HSC from aged mice compared with young mice. Further, we found a decline in serum Gal-1 levels in men with age-related BMD decrease. There was positive correlation between BMD and serum Gal-1 levels in these men. CONCLUSIONS Age-related trabecular bone loss is associated with a decline in serum Gal-1 level in mice and men. Our study suggested Gal-1 had great potential to be a biomarker for discovering BMSC senescence, diagnosing early osteoporosis and monitoring trabecular bone loss.
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Affiliation(s)
- Wenting Xu
- Department of Orthopaedics, The Second Affiliated Hospital of Soochow University, Suzhou, 215004, Jiangsu, China.,Department of Orthopaedics, Shanghai Jiangong Hospital, Shanghai, 200083, China
| | - Cheng Ni
- Department of Orthopaedics, Shanghai Jiangong Hospital, Shanghai, 200083, China
| | - Yuxuan Wang
- Department of Orthopaedics, Shanghai Jiangong Hospital, Shanghai, 200083, China
| | - Guoqing Zheng
- Department of Orthopaedics, Shanghai Jiangong Hospital, Shanghai, 200083, China
| | - Jinshan Zhang
- Department of Orthopaedics, The Second Affiliated Hospital of Soochow University, Suzhou, 215004, Jiangsu, China
| | - Youjia Xu
- Department of Orthopaedics, The Second Affiliated Hospital of Soochow University, Suzhou, 215004, Jiangsu, China.
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Ma R, Li Y, Wang J, Yang P, Wang K, Wang W. Incorporation of nanosized calcium silicate improved osteointegration of polyetheretherketone under diabetic conditions. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2020; 31:98. [PMID: 33130931 DOI: 10.1007/s10856-020-06435-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 09/24/2020] [Indexed: 06/11/2023]
Abstract
Diabetes can impair osteoblastic functions and negatively interfere with osteointegration at the bone/implant interface. Previously, we prepared a nanosized calcium silicate (CS) incorporated-polyetheretherketone (PK) biocomposite (CS/PK) and found that the CS/PK composite exhibited enhanced osteoblast functions in vitro and osteointegration in vivo, but its bioperformance under diabetic conditions remained elusive. In this study, MC3T3-E1 cells incubated on CS/PK and PK samples were subjected to diabetic serum (DS) and normal serum (NS); cell attachment, morphology, spreading, proliferation, and osteogenic differentiation were compared to assess in vitro osteoblastic functions on the surfaces of different materials. An in vivo test was performed on diabetic rabbits implanted with CS/PK or PK implants into the cranial bone defect to assess the osteointegration ability of the implants. In vitro results showed that diabetes inhibited osteoblastic functions evidenced by impaired morphology and spreading, and decreased attachment, proliferation, and osteogenic differentiation compared with the findings under normal conditions. Notably, CS/PK ameliorated osteoblastic disfunction under diabetic conditions in vitro. In vivo results from micro-CT and histologic examinations revealed that rabbits with CS/PK implants exhibited improved osteointegration at the bone/implant interface under diabetic conditions compared with PK. Therefore, the CS/PK composite improved the impaired osteointegration induced by diabetes and is a promising orthopedic or craniofacial implant material that may obtain good clinical performance in diabetic patients.
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Affiliation(s)
- Rui Ma
- Department of Bone and Joint Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710004, Shanxi, China
| | - Yongwei Li
- Department of Bone and Joint Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710004, Shanxi, China
| | - Jialin Wang
- Department of Bone and Joint Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710004, Shanxi, China
| | - Pei Yang
- Department of Bone and Joint Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710004, Shanxi, China
| | - Kunzheng Wang
- Department of Bone and Joint Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710004, Shanxi, China.
| | - Wei Wang
- Department of Bone and Joint Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710004, Shanxi, China.
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Yang XJ, Wang FQ, Lu CB, Zou JW, Hu JB, Yang Z, Sang HX, Zhang Y. Modulation of bone formation and resorption using a novel zoledronic acid loaded gelatin nanoparticles integrated porous titanium scaffold: an in vitro and in vivo study. ACTA ACUST UNITED AC 2020; 15:055013. [PMID: 32252046 DOI: 10.1088/1748-605x/ab8720] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Osteoporotic bone defects are a major challenge in clinics for bone regeneration. With the condition of osteoporosis, excessive bone absorption and impaired osteogenesis result in unexpectedly long healing procedures for defects. In order to simultaneously enhance bone formation and reduce bone resorption, a polydopamine-coated porous titanium scaffold was designed, to be integrated with anti-catabolic drug zoledronic acid nanoparticles (ZOL loaded gelatin NPs), which was able to achieve a local sustained release of ZOL as expected. The in vitro study demonstrated that extracts of the composite scaffolds would stimulate osteoblast differentiation; they also inhibited osteoclastogenesis at a ZOL loading concentration of 50 μmol l-1. In the subsequent in vivo study, the composite scaffolds were implanted into ovariectomy-induced osteoporotic rabbits suffering from femoral condyles defects. The results indicated that the composite scaffolds without ZOL loaded gelatin NPs only induced callus formation, mainly at the interface margin between the implant and bone, whereas the composite scaffolds with ZOL loaded gelatin NPs were capable of further enhancing osteogenesis and bone growth into the scaffolds. Moreover, the research proved that the promoting effect was optimal at a ZOL loading concentration of 50 μmol l-1. In summary, the present research indicated that a new type of porous titanium scaffold integrated with ZOL loaded gelatin NPs inherited a superior biocompatibility and bone regeneration capability. It would be an optimal alternative for the reconstruction of osteoporosis-related defects compared to a traditional porous titanium implant; in other words, the new type of scaffold offers a new effective and practical procedure option for patients suffering from osteoporotic bone defects.
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Affiliation(s)
- Xiao-Jiang Yang
- Department of Orthopaedic Surgery, Xijing Hospital, The Air Force Medical University, Xi'an, Shaanxi 710032, People's Republic of China. These four authors contributed equally to this work
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Muruganandan S, Ionescu AM, Sinal CJ. At the Crossroads of the Adipocyte and Osteoclast Differentiation Programs: Future Therapeutic Perspectives. Int J Mol Sci 2020; 21:ijms21072277. [PMID: 32224846 PMCID: PMC7177886 DOI: 10.3390/ijms21072277] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 03/24/2020] [Accepted: 03/25/2020] [Indexed: 01/01/2023] Open
Abstract
The coordinated development and function of bone-forming (osteoblasts) and bone-resorbing (osteoclasts) cells is critical for the maintenance of skeletal integrity and calcium homeostasis. An enhanced adipogenic versus osteogenic potential of bone marrow mesenchymal stem cells (MSCs) has been linked to bone loss associated with diseases such as diabetes mellitus, as well as aging and postmenopause. In addition to an inherent decrease in bone formation due to reduced osteoblast numbers, recent experimental evidence indicates that an increase in bone marrow adipocytes contributes to a disproportionate increase in osteoclast formation. Therefore, a potential strategy for therapeutic intervention in chronic bone loss disorders such as osteoporosis is to interfere with the pro-osteoclastogenic influence of marrow adipocytes. However, application of this approach is limited by the extremely complex regulatory processes in the osteoclastogenic program. For example, key regulators of osteoclastogenesis such as the receptor activator of nuclear factor-kappaB ligand (RANKL) and the soluble decoy receptor osteoprotegerin (OPG) are not only secreted by both osteoblasts and adipocytes, but are also regulated through several cytokines produced by these cell types. In this context, biologically active signaling molecules secreted from bone marrow adipocytes, such as chemerin, adiponectin, leptin, visfatin and resistin, can have a profound influence on the osteoclast differentiation program of hematopoietic stem cells (HSCs), and thus, hold therapeutic potential under disease conditions. In addition to these paracrine signals, adipogenic transcription factors including CCAAT/enhancer binding protein alpha (C/EBPα), C/EBP beta (C/EBPβ) and peroxisome proliferator-associated receptor gamma (PPARγ) are also expressed by osteoclastogenic cells. However, in contrast to MSCs, activation of these adipogenic transcription factors in HSCs promotes the differentiation of osteoclast precursors into mature osteoclasts. Herein, we discuss the molecular mechanisms that link adipogenic signaling molecules and transcription factors to the osteoclast differentiation program and highlight therapeutic strategies targeting these mechanisms for promoting bone homeostasis.
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Affiliation(s)
- Shanmugam Muruganandan
- Department of Developmental Biology, Harvard School of Dental Medicine, 188 Longwood Avenue, Boston, MA 02115, USA;
- Correspondence: ; Tel.: +614-971-0412
| | - Andreia M. Ionescu
- Department of Developmental Biology, Harvard School of Dental Medicine, 188 Longwood Avenue, Boston, MA 02115, USA;
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Concise Review: The Regulatory Mechanism of Lysine Acetylation in Mesenchymal Stem Cell Differentiation. Stem Cells Int 2020; 2020:7618506. [PMID: 32399051 PMCID: PMC7204305 DOI: 10.1155/2020/7618506] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Accepted: 01/02/2020] [Indexed: 12/30/2022] Open
Abstract
Nowadays, the use of MSCs has attracted considerable attention in the global science and technology field, with the self-renewal and multidirectional differentiation potential for diabetes, obesity treatment, bone repair, nerve repair, myocardial repair, and so on. Epigenetics plays an important role in the regulation of mesenchymal stem cell differentiation, which has become a research hotspot in the medical field. This review focuses on the role of lysine acetylation modification on the determination of MSC differentiation direction. During this progress, the recruitment of lysine acetyltransferases (KATs) and lysine deacetylases (KDACs) is the crux of transcriptional mechanisms in the dynamic regulation of key genes controlling MSC multidirectional differentiation.
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Ma R, Guo D. Evaluating the bioactivity of a hydroxyapatite-incorporated polyetheretherketone biocomposite. J Orthop Surg Res 2019; 14:32. [PMID: 30683125 PMCID: PMC6347847 DOI: 10.1186/s13018-019-1069-1] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 01/15/2019] [Indexed: 12/16/2022] Open
Abstract
Background Polyetheretherketone (PEEK) exhibits stable chemical properties, excellent biocompatibility, and rational mechanical properties that are similar to those of human cortical bone, but the lack of bioactivity impedes its clinical application. Methods In this study, hydroxyapatite (HA) was incorporated into PEEK to fabricate HA/PEEK biocomposite using a compounding and injection-molding technique. The tensile properties of the prepared HA/PEEK composites (HA content from 0 to 40 wt%) were tested to choose an optimal HA content. To evaluate the bioactivity of the composite, the cell attachment, proliferation, spreading and alkaline phosphatase (ALP) activity of MC3T3-E1 cells, and apatite formation after immersion in simulated body fluid (SBF), and osseointegration in a rabbit cranial defect model were investigated. The results were compared to those from ultra-high molecular weight polyethylene (UHMWPE) and pure PEEK. Results By evaluating the tensile properties and elastic moduli of PEEK composite samples/PEEK composites with different HA contents, the 30 wt% HA/PEEK composite was chosen for use in the subsequent tests. The results of the cell tests demonstrated that PEEK composite samples/PEEK composite exhibited better cell attachment, proliferation, spreading, and higher ALP activity than those of UHMWPE and pure PEEK. Apatite islands formed on the HA/PEEK composite after immersion in SBF for 7 days and grew continuously with longer time periods. Animal tests indicated that bone contact and new bone formation around the HA/PEEK composite were more obvious than those around UHMWPE and pure PEEK. Conclusions The HA/PEEK biocomposite created by a compounding and injection-molding technique exhibited enhanced osteogenesis and could be used as a candidate of orthopedic implants.
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Affiliation(s)
- Rui Ma
- Department of Orthopedics, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710004, Shaanxi, China.
| | - Dagang Guo
- State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China
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Li J, Zuo B, Zhang L, Dai L, Zhang X. Osteoblast versus Adipocyte: Bone Marrow Microenvironment-Guided Epigenetic Control. CASE REPORTS IN ORTHOPEDIC RESEARCH 2018. [DOI: 10.1159/000489053] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The commitment and differentiation of bone marrow mesenchymal stem cells (MSCs) is tightly controlled by the local environment ensuring lineage differentiation balance and bone homeostasis. However, pathological conditions linked with osteoporosis have changed the bone marrow microenvironment, shifting MSCs’ fate to favor adipocytes over osteoblasts, and consequently leading to decreased bone mass with marrow fat accumulation. Multiple questions related to the underlying mechanisms remain to be answered. As recent findings have confirmed the fundamental role of the epigenetic mechanism in connecting environmental signals with gene expression and stem cell differentiation, a regulatory network in the bone marrow microenvironment, epigenetic modulation, gene expression, and MSC differentiation begins to emerge. This review discusses how pathological environmental factors affect MSCs’ fate by epigenetic modulating lineage-specific genes. We conclude that manipulating local environments and/or the epigenetic regulatory machinery that target the adipocyte differentiation pathway might be a therapeutic implication of bone loss diseases such as osteoporosis.
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Li G, Zhang L, Wang L, Yuan G, Dai K, Pei J, Hao Y. Dual modulation of bone formation and resorption with zoledronic acid-loaded biodegradable magnesium alloy implants improves osteoporotic fracture healing: An in vitro and in vivo study. Acta Biomater 2018; 65:486-500. [PMID: 29079514 DOI: 10.1016/j.actbio.2017.10.033] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 10/02/2017] [Accepted: 10/23/2017] [Indexed: 01/08/2023]
Abstract
Osteoporotic fracture (OPF) remains a major clinical challenge for skeletal regeneration. Impaired osteogenesis and excessive remodeling result in prolonged and poor quality of fracture healing. To augment bone formation and inhibit excessive resorption simultaneously, we constructed a biodegradable magnesium-based implant integrated with the anti-catabolic drug zoledronic acid (ZA); this implant exhibits controllable, sustained release of magnesium degradation products and ZA in vitro. The extracts greatly stimulate the osteogenic differentiation of rat-bone marrow-derived mesenchymal stem cells (rBMSCs), while osteoclastogenesis is inhibited by ZA. Implantation of intramedullary nails to fix femur fracture in ovariectomy-induced osteoporotic rats for up to 12 weeks demonstrates magnesium implants alone can enhance OPF repair through promoting callus formation compared to conventional stainless steel, while the combinatory treatment with local ZA release from implant coating further increases bone regeneration rate and callus size, remarkably improves bone quality and mechanical strength and suppresses osteoclasts and bone remodeling, due to the synergistic effect of both agents. The slow and uniform degradation of the implant ensures a steady decrease in bending force, which meets clinical requirements. In summary, biodegradable magnesium-based implants can locally co-deliver magnesium degradation products and zoledronic acid in a controlled manner, and can be superior alternatives for the reconstruction of osteoporosis-related fracture. STATEMENT OF SIGNIFICANCE Management of osteoporotic fracture has posed a major challenge in orthopedics, as the imbalance between diminished osteogenesis and excessive bone remodeling often leads to delayed and compromised fracture repair. Among various efforts expended on augmenting osteoporotic fracture healing, herein we reported a new strategy by engineering and utilizing a biodegradable magnesium-based implant integrated with local drug delivery, specifically, zoledronic acid (ZA)-loaded polylactic acid/brushite bilayer coating on a biodegradable Mg-Nd-Zn-Zr alloy (denoted as Mg/ZA/CaP), aiming to combine the favorable properties of Mg and zoledronic acid for simultaneous modulation of bone formation and bone resorption. In vitro and in vivo studies demonstrated its superior treatment efficacy along with adequate degradation. It stimulated new bone formation while suppressing remodeling, ascribed to the local release of magnesium degradation products and zoledronic acid. To our knowledge, the enhanced fracture repair capability of Mg-based implants was for the first time demonstrated in an osteoporotic fracture animal model. This innovative biodegradable Mg-based orthopedic implant presents great potential as a superior alternative to current internal fixation devices for treating osteoporotic fracture.
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Affiliation(s)
- Guoyuan Li
- Department of Orthopaedics, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, People's Republic of China
| | - Lei Zhang
- National Engineering Research Center of Light Alloy Net Forming & State Key Laboratory of Metal Matrix Composite, Shanghai 200240, People's Republic of China
| | - Lei Wang
- Department of Orthopaedics, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, People's Republic of China
| | - Guangyin Yuan
- National Engineering Research Center of Light Alloy Net Forming & State Key Laboratory of Metal Matrix Composite, Shanghai 200240, People's Republic of China
| | - Kerong Dai
- Department of Orthopaedics, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, People's Republic of China
| | - Jia Pei
- National Engineering Research Center of Light Alloy Net Forming & State Key Laboratory of Metal Matrix Composite, Shanghai 200240, People's Republic of China.
| | - Yongqiang Hao
- Department of Orthopaedics, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, People's Republic of China.
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Yang Y, Yang S, Wang Y, Yu Z, Ao H, Zhang H, Qin L, Guillaume O, Eglin D, Richards RG, Tang T. Anti-infective efficacy, cytocompatibility and biocompatibility of a 3D-printed osteoconductive composite scaffold functionalized with quaternized chitosan. Acta Biomater 2016; 46:112-128. [PMID: 27686039 DOI: 10.1016/j.actbio.2016.09.035] [Citation(s) in RCA: 90] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2016] [Revised: 09/01/2016] [Accepted: 09/24/2016] [Indexed: 12/15/2022]
Abstract
Contaminated or infected bone defects remain serious challenges in clinical trauma and orthopaedics, and a bone substitute with both osteoconductivity and antibacterial properties represents an improvement for treatment strategy. In this study, quaternized chitosan (hydroxypropyltrimethyl ammonium chloride chitosan, HACC) was grafted to 3D-printed scaffolds composed of polylactide-co-glycolide (PLGA) and hydroxyapatite (HA), in order to design bone engineering scaffolds endowed with antibacterial and osteoconductive properties. We found that both the PLGA/HA/HACC and PLGA/HACC composite scaffolds decreased bacterial adhesion and biofilm formation under in vitro and in vivo conditions. Additionally, ATP leakage assay indicated that immobilizing HACC on the scaffolds could effectively disrupt microbial membranes. Using human bone marrow-derived mesenchymal stem cells (hBMSCs), we demonstrated that HA incorporated scaffolds, including PLGA/HA and PLGA/HA/HACC, favoured cell attachment, proliferation, spreading and osteogenic differentiation compared to HA-free PLGA or PLGA/HACC scaffolds. Finally, an in vivo biocompatibility assay conducted on rats, showed that HA incorporated scaffolds (including PLGA/HA and PLGA/HA/HACC scaffolds) exhibited good neovascularization and tissue integration. Taken together, our findings support the approach for developing porous PLGA/HA/HACC composite scaffold with potential clinical application in the treatment of infected bone. STATEMENT OF SIGNIFICANCE Although plenty of conductive scaffold biomaterials have been exploited to improve bone regeneration under infection, potential tissue toxicity under high concentration and antibiotic-resistance are their main deficiencies. This study indicated that HACC-grafted PLGA/HA composite scaffold prepared using an innovative 3D-printing technique and covalent grafting strategy showed significantly enhanced antibacterial activities, especially against the antibiotic-resistant strains, together with good osteogenic activity and biocompatibility. Therefore, it provides an effective porous composite scaffold to combat the infected bone defect in clinic with decreased risks of bacterial resistance and open a feasible strategy for the modification of scaffold interfaces involved in the bone regeneration and anti-infection.
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Liu Y, Zhang XL, Chen L, Lin X, Xiong D, Xu F, Yuan LQ, Liao EY. Epigenetic mechanisms of bone regeneration and homeostasis. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2016; 122:85-92. [DOI: 10.1016/j.pbiomolbio.2016.01.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Revised: 12/24/2015] [Accepted: 01/06/2016] [Indexed: 01/08/2023]
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Chen W, Tian B, Lei Y, Ke QF, Zhu ZA, Guo YP. Hydroxyapatite coatings with oriented nanoplate and nanorod arrays: Fabrication, morphology, cytocompatibility and osteogenic differentiation. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 67:395-408. [DOI: 10.1016/j.msec.2016.04.106] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2015] [Revised: 03/28/2016] [Accepted: 04/27/2016] [Indexed: 11/30/2022]
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Wang YG, Han XG, Yang Y, Qiao H, Dai KR, Fan QM, Tang TT. Functional differences between AMPK α1 and α2 subunits in osteogenesis, osteoblast-associated induction of osteoclastogenesis, and adipogenesis. Sci Rep 2016; 6:32771. [PMID: 27600021 PMCID: PMC5013406 DOI: 10.1038/srep32771] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Accepted: 08/15/2016] [Indexed: 12/21/2022] Open
Abstract
The endocrine role of the skeleton-which is impaired in human diseases including osteoporosis, obesity and diabetes-has been highlighted previously. In these diseases, the role of AMPK, a sensor and regulator of energy metabolism, is of biological and clinical importance. Since AMPK’s main catalytic subunit α has two isoforms, it is unclear whether functional differences between them exist in the skeletal system. The current study overexpressed AMPKα1 and α2 in MC3T3-E1 cells, primary osteoblasts and mouse BMSCs by lentiviral transduction. Cells overexpressing AMPKα2 showed higher osteogenesis potential than AMPKα1, wherein androgen receptor (AR) and osteoactivin played important roles. RANKL and M-CSF were secreted at lower levels from cells overexpressing α2 than α1, resulting in decreased osteoblast-associated osteoclastogenesis. Adipogenesis was inhibited to a greater degree in 3T3-L1 cells overexpressing α2 than α1, which was modulated by AR. An abnormal downregulation of AMPKα2 was observed in human BMSCs exhibiting the fibrous dysplasia (FD) phenotype. Overexpression of AMPKα2 in these cells rescued the defect in osteogenesis, suggesting that AMPKα2 plays a role in FD pathogenesis. These findings highlight functional differences between AMPKα1 and α2, and provide a basis for investigating the molecular mechanisms of diseases associated with impaired functioning of the skeletal system.
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Affiliation(s)
- Yu-Gang Wang
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, People's Republic of China
| | - Xiu-Guo Han
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, People's Republic of China
| | - Ying Yang
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, People's Republic of China
| | - Han Qiao
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, People's Republic of China
| | - Ke-Rong Dai
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, People's Republic of China
| | - Qi-Ming Fan
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, People's Republic of China
| | - Ting-Ting Tang
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, People's Republic of China
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Tian B, Chen W, Yu D, Lei Y, Ke Q, Guo Y, Zhu Z. Fabrication of silver nanoparticle-doped hydroxyapatite coatings with oriented block arrays for enhancing bactericidal effect and osteoinductivity. J Mech Behav Biomed Mater 2016; 61:345-359. [DOI: 10.1016/j.jmbbm.2016.04.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Revised: 03/30/2016] [Accepted: 04/01/2016] [Indexed: 12/24/2022]
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Wang YG, Qu XH, Yang Y, Han XG, Wang L, Qiao H, Fan QM, Tang TT, Dai KR. AMPK promotes osteogenesis and inhibits adipogenesis through AMPK-Gfi1-OPN axis. Cell Signal 2016; 28:1270-1282. [PMID: 27283242 DOI: 10.1016/j.cellsig.2016.06.004] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2016] [Revised: 05/27/2016] [Accepted: 06/05/2016] [Indexed: 12/16/2022]
Abstract
Several metabolic, genetic and oncogenic bone diseases share the common pathological phenotype of defective bone marrow stromal cell (BMSC) differentiation. Many reports in bone science in the past several years have suggested that the skeleton also has an endocrine role. The role of AMP-activated protein kinase (AMPK) as an energy metabolism sensor and how it regulates BMSC differentiation is largely unknown. In the current study, we used AMPK agonists to activate AMPK in MC3T3-E1 cells to investigate the functional roles of AMPK in osteogenesis. However, metformin and AICAR failed to activate AMPK consistently. Therefore, we established MC3T3-E1 and 3T3-L1 cell models of AMPK α subunit overexpression through lentivirus vector, in which AMPK was overactivated. AMPK hyperactivation stimulated MC3T3-E1 cell osteogenesis and inhibited 3T3-L1 cell adipogenesis. Osteopontin (OPN) mediated AMPK regulation of osteogenesis and adipogenesis. Furthermore, we provided evidence that the transcriptional repressor growth factor independence-1 (Gfi1) was downregulated and disassociated from the OPN promoter in response to AMPK activation, resulting in the upregulation of OPN. Overexpression of wild-type and dominant-negative Gfi1 modulated MC3T3-E1 osteogenesis and 3T3-L1 adipogenesis. Further evidence suggested that AMPK enhanced ectopic bone formation of MC3T3-E1 cells through the AMPK-Gfi1-OPN axis. In conclusion, AMPK was sufficient to stimulate osteogenesis of MC3T3-E1 cells and inhibit adipogenesis of 3T3-L1 cells through the AMPK-Gfi1-OPN axis. These findings helped elucidate the molecular mechanisms underlying AMPK regulation of osteogenesis and adipogenesis.
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Affiliation(s)
- Yu-Gang Wang
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, People's Republic of China
| | - Xin-Hua Qu
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, People's Republic of China
| | - Ying Yang
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, People's Republic of China
| | - Xiu-Guo Han
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, People's Republic of China
| | - Lei Wang
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, People's Republic of China
| | - Han Qiao
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, People's Republic of China
| | - Qi-Ming Fan
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, People's Republic of China.
| | - Ting-Ting Tang
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, People's Republic of China.
| | - Ke-Rong Dai
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, 639 Zhizaoju Road, Shanghai 200011, People's Republic of China; The Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai JiaoTong University School of Medicine (SJTUSM) & Shanghai Institutes for Biological Sciences (SIBS), Chinese Academy of Sciences (CAS), Shanghai 200025, China.
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Tian B, Chen W, Dong Y, Marymont JV, Lei Y, Ke Q, Guo Y, Zhu Z. Silver nanoparticle-loaded hydroxyapatite coating: structure, antibacterial properties, and capacity for osteogenic induction in vitro. RSC Adv 2016. [DOI: 10.1039/c5ra25391h] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
AgNP-HAC has the potential to be used on the surfaces of orthopedic and dental implants for infection prophylaxis.
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Affiliation(s)
- Bo Tian
- Shanghai Key Laboratory of Orthopedic Implant
- Department of Orthopedic Surgery
- Shanghai Ninth People's Hospital
- Shanghai Jiao Tong University School of Medicine
- Shanghai 200011
| | - Wei Chen
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials
- Shanghai Normal University
- Shanghai 200234
- China
| | - Yufeng Dong
- Department of Orthopaedic Surgery
- Louisiana State University Health Sciences Center
- Shreveport
- USA
| | - John V. Marymont
- Department of Orthopaedic Surgery
- Louisiana State University Health Sciences Center
- Shreveport
- USA
| | - Yong Lei
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials
- Shanghai Normal University
- Shanghai 200234
- China
| | - Qinfei Ke
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials
- Shanghai Normal University
- Shanghai 200234
- China
| | - Yaping Guo
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials
- Shanghai Normal University
- Shanghai 200234
- China
| | - Zhenan Zhu
- Shanghai Key Laboratory of Orthopedic Implant
- Department of Orthopedic Surgery
- Shanghai Ninth People's Hospital
- Shanghai Jiao Tong University School of Medicine
- Shanghai 200011
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Epigenetic landscape in PPARγ2 in the enhancement of adipogenesis of mouse osteoporotic bone marrow stromal cell. Biochim Biophys Acta Mol Basis Dis 2015; 1852:2504-16. [DOI: 10.1016/j.bbadis.2015.08.020] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Revised: 08/21/2015] [Accepted: 08/24/2015] [Indexed: 11/21/2022]
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Gao Y, Sun Y, Duan K, Shi H, Wang S, Li H, Wang N. CpG site DNA methylation of theCCAAT/enhancer-binding protein, alphapromoter in chicken lines divergently selected for fatness. Anim Genet 2015; 46:410-7. [DOI: 10.1111/age.12326] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/27/2015] [Indexed: 11/30/2022]
Affiliation(s)
- Yuan Gao
- Key Laboratory of Chicken Genetics and Breeding; Ministry of Agriculture; Key Laboratory of Animal Genetics, Breeding and Reproduction; Education Department of Heilongjiang Province; College of Animal Science and Technology; Northeast Agricultural University; Harbin Heilongjiang 150030 China
| | - Yingning Sun
- Key Laboratory of Chicken Genetics and Breeding; Ministry of Agriculture; Key Laboratory of Animal Genetics, Breeding and Reproduction; Education Department of Heilongjiang Province; College of Animal Science and Technology; Northeast Agricultural University; Harbin Heilongjiang 150030 China
- College of Life Science and Agriculture Forestry; Qiqihar University; Qiqihar Heilongjiang 161006 China
| | - Kui Duan
- Key Laboratory of Chicken Genetics and Breeding; Ministry of Agriculture; Key Laboratory of Animal Genetics, Breeding and Reproduction; Education Department of Heilongjiang Province; College of Animal Science and Technology; Northeast Agricultural University; Harbin Heilongjiang 150030 China
| | - Hongyan Shi
- Key Laboratory of Chicken Genetics and Breeding; Ministry of Agriculture; Key Laboratory of Animal Genetics, Breeding and Reproduction; Education Department of Heilongjiang Province; College of Animal Science and Technology; Northeast Agricultural University; Harbin Heilongjiang 150030 China
| | - Shouzhi Wang
- Key Laboratory of Chicken Genetics and Breeding; Ministry of Agriculture; Key Laboratory of Animal Genetics, Breeding and Reproduction; Education Department of Heilongjiang Province; College of Animal Science and Technology; Northeast Agricultural University; Harbin Heilongjiang 150030 China
| | - Hui Li
- Key Laboratory of Chicken Genetics and Breeding; Ministry of Agriculture; Key Laboratory of Animal Genetics, Breeding and Reproduction; Education Department of Heilongjiang Province; College of Animal Science and Technology; Northeast Agricultural University; Harbin Heilongjiang 150030 China
| | - Ning Wang
- Key Laboratory of Chicken Genetics and Breeding; Ministry of Agriculture; Key Laboratory of Animal Genetics, Breeding and Reproduction; Education Department of Heilongjiang Province; College of Animal Science and Technology; Northeast Agricultural University; Harbin Heilongjiang 150030 China
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Zhang YX, Sun HL, Liang H, Li K, Fan QM, Zhao QH. Dynamic and distinct histone modifications of osteogenic genes during osteogenic differentiation. J Biochem 2015; 158:445-57. [PMID: 26078467 DOI: 10.1093/jb/mvv059] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Accepted: 05/05/2015] [Indexed: 12/20/2022] Open
Abstract
Many skeletal diseases have common pathological phenotype of defective osteogenesis of bone marrow stromal cells (BMSCs), in which histone modifications play an important role. However, few studies have examined the dynamics of distinct histone modifications during osteogenesis. In this study, we examined the dynamics of H3K9/K14 and H4K12 acetylation; H3K4 mono-, di- and tri-methylation; H3K9 di-methylation and H3K27 tri-methylation in osteogenic genes, runt-related transcription factor 2 (Runx2), osterix (Osx), alkaline phosphatase, bone sialoprotein and osteocalcin, during C3H10T1/2 osteogenesis. H3 and H4 acetylation and H3K4 di-methylation were elevated, and H3K9 di-methylation and H3K27 tri-methylation were reduced in osteogenic genes during C3H10T1/2 osteogenesis. C3H10T1/2 osteogenesis could be modulated by altering the patterns of H3 and H4 acetylation and H3K27 tri-methylation. In a glucocorticoid-induced osteoporosis mouse model, we observed the attenuation of osteogenic potential of osteoporotic BMSCs in parallel with H3 and H4 hypo-acetylation and H3K27 hyper-tri-methylation in Runx2 and Osx genes. When H3 and H4 acetylation was elevated, and H3K27 tri-methylation was reduced, the attenuated osteogenic potential of osteoporotic BMSCs was rescued effectively. These observations provide a deeper insight into the mechanisms of osteogenic differentiation and the pathophysiology of osteoporosis and can be used to design new drugs and develop new therapeutic methods to treat skeletal diseases.
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Affiliation(s)
- Yong-Xing Zhang
- Department of Orthopedics, Shanghai First People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, China
| | - Hai-Lang Sun
- Department of Orthopedics, Huai'an First People's Hospital, Nanjing Medical University, Huai'an 223300, China; and
| | - He Liang
- Department of Orthopedics, Shanghai First People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, China
| | - Kai Li
- Department of Orthopedics, Shanghai First People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, China
| | - Qi-Ming Fan
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
| | - Qing-Hua Zhao
- Department of Orthopedics, Shanghai First People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, China;
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Isolation and characterization of mesenchymal stem-like cells from human nucleus pulposus tissue. SCIENCE CHINA-LIFE SCIENCES 2015; 58:509-11. [PMID: 25833805 DOI: 10.1007/s11427-015-4839-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2014] [Accepted: 02/11/2015] [Indexed: 10/23/2022]
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25
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Lu Y, Wang J, Yan J, Yang Y, Sun Y, Huang Y, Hu R, Zhang Y, Jiang H. Sevoflurane attenuate hypoxia-induced VEGF level in tongue squamous cell carcinoma cell by upregulating the DNA methylation states of the promoter region. Biomed Pharmacother 2015; 71:139-45. [PMID: 25960229 DOI: 10.1016/j.biopha.2015.02.032] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Accepted: 02/21/2015] [Indexed: 12/12/2022] Open
Abstract
Anaesthetic agents were confirmed to play a role on the tumor angiogenesis. The effect of sevoflurane on tongue squamous cell carcinoma (TSCC) cell has not been investigated. SCC-4 cells were exposed to sevoflurane after simulating hypoxia. Then, both the mRNA and protein level of hypoxia-inducible factor (HIF)-1α and VEGF were detected. The methylation states of the VEGF promoter region were also assessed to reveal the underlying mechanism. Finally, the DNA methyltransferase inhibitor 5-aza-2'-deoxycytidine (5-Aza) was administrated to reveal the relationship of DNA methylation on the regulation of the VEGF level. Results showed that sevoflurane attenuated the hypoxia-induced VEGF level without altering the HIF-1α after exposure for 24 and 72 h. Sevoflurane increased the DNA methylation of the VEGF promoter region. The attenuation effect of sevoflurane on hypoxia-induced VEGF level could be blocked by 5-Aza. We concluded that sevoflurane attenuates hypoxia-induced VEGF level via DNA methylation of the promoter region in TSCC cell.
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Affiliation(s)
- Yi Lu
- Department of Anaesthesiology, Department of plastic and reconstructive surgery, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Jing Wang
- Department of Anaesthesiology, Department of plastic and reconstructive surgery, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Jia Yan
- Department of Anaesthesiology, Department of plastic and reconstructive surgery, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Yaqiong Yang
- Department of Anaesthesiology, Department of plastic and reconstructive surgery, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Yu Sun
- Department of Anaesthesiology, Department of plastic and reconstructive surgery, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Yan Huang
- Department of Anaesthesiology, Department of plastic and reconstructive surgery, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Rong Hu
- Department of Anaesthesiology, Department of plastic and reconstructive surgery, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Ying Zhang
- Department of Anaesthesiology, Department of plastic and reconstructive surgery, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China
| | - Hong Jiang
- Department of Anaesthesiology, Department of plastic and reconstructive surgery, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University, School of Medicine, Shanghai, China.
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26
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Guan JJ, Tian B, Tang S, Ke QF, Zhang CQ, Zhu ZA, Guo YP. Hydroxyapatite coatings with oriented nanoplate arrays: synthesis, formation mechanism and cytocompatibility. J Mater Chem B 2015; 3:1655-1666. [DOI: 10.1039/c4tb02085e] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel strategy has been developed to fabricate hydroxyapatite coatings with oriented nanoplate arrays for implants of human hard tissues.
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Affiliation(s)
- Jun-Jie Guan
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials
- Shanghai Normal University
- Shanghai 200234
- China
- Department of Orthopedics Surgery
| | - Bo Tian
- Shanghai Key Laboratory of Orthopedic Implant
- Department of Orthopedic Surgery
- Shanghai Ninth People's Hospital
- Shanghai Jiao Tong University School of Medicine
- Shanghai 200011
| | - Sha Tang
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials
- Shanghai Normal University
- Shanghai 200234
- China
| | - Qin-Fei Ke
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials
- Shanghai Normal University
- Shanghai 200234
- China
| | - Chang-Qing Zhang
- Department of Orthopedics Surgery
- Shanghai Sixth People's Hospital
- Shanghai Jiaotong University
- Shanghai 20200233
- China
| | - Zhen-An Zhu
- Shanghai Key Laboratory of Orthopedic Implant
- Department of Orthopedic Surgery
- Shanghai Ninth People's Hospital
- Shanghai Jiao Tong University School of Medicine
- Shanghai 200011
| | - Ya-Ping Guo
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials
- Shanghai Normal University
- Shanghai 200234
- China
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27
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Ma R, Tang S, Tan H, Lin W, Wang Y, Wei J, Zhao L, Tang T. Preparation, characterization, and in vitro osteoblast functions of a nano-hydroxyapatite/polyetheretherketone biocomposite as orthopedic implant material. Int J Nanomedicine 2014; 9:3949-61. [PMID: 25170265 PMCID: PMC4145828 DOI: 10.2147/ijn.s67358] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
A bioactive composite was prepared by incorporating 40 wt% nano-hydroxyapatite (nHA) into polyetheretherketone (PEEK) through a process of compounding, injection, and molding. The mechanical and surface properties of the nHA/PEEK composite were characterized, and the in vitro osteoblast functions in the composite were investigated. The mechanical properties (elastic modulus and compressive strength) of the nHA/PEEK composite increased significantly, while the tensile strength decreased slightly as compared with PEEK. Further, the addition of nHA into PEEK increased the surface roughness and hydrophilicity of the nHA/PEEK composite. In cell tests, compared with PEEK and ultra-high-molecular-weight polyethylene, it was found that the nHA/PEEK composite could promote the functions of MC3T3-E1 cells, including cell attachment, spreading, proliferation, alkaline phosphatase activity, calcium nodule formation, and expression of osteogenic differentiation-related genes. Incorporation of nHA into PEEK greatly improved the bioperformance of PEEK. The nHA/PEEK composite might be a promising orthopedic implant material.
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Affiliation(s)
- Rui Ma
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, People's Republic of China
| | - Songchao Tang
- Key Laboratory for Ultrafine Materials of Ministry of Education and The State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, People's Republic of China
| | - Honglue Tan
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, People's Republic of China
| | - Wentao Lin
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, People's Republic of China
| | - Yugang Wang
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, People's Republic of China
| | - Jie Wei
- Key Laboratory for Ultrafine Materials of Ministry of Education and The State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, People's Republic of China
| | - Liming Zhao
- Key Laboratory for Ultrafine Materials of Ministry of Education and The State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, People's Republic of China
| | - Tingting Tang
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, People's Republic of China
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28
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Ma R, Tang S, Tan H, Qian J, Lin W, Wang Y, Liu C, Wei J, Tang T. Preparation, characterization, in vitro bioactivity, and cellular responses to a polyetheretherketone bioactive composite containing nanocalcium silicate for bone repair. ACS APPLIED MATERIALS & INTERFACES 2014; 6:12214-12225. [PMID: 25013988 DOI: 10.1021/am504409q] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this study, a nanocalcium silicate (n-CS)/polyetheretherketone (PEEK) bioactive composite was prepared using a process of compounding and injection-molding. The mechanical properties, hydrophilicity, and in vitro bioactivity of the composite, as well as the cellular responses of MC3T3-E1 cells (attachment, proliferation, spreading, and differentiation) to the composite, were investigated. The results showed that the mechanical properties and hydrophilicity of the composites were significantly improved by the addition of n-CS to PEEK. In addition, an apatite-layer formed on the composite surface after immersion in simulated body fluid (SBF) for 7 days. In cell culture tests, the results revealed that the n-CS/PEEK composite significantly promoted cell attachment, proliferation, and spreading compared with PEEK or ultrahigh molecular weight polyethylene (UHMWPE). Moreover, cells grown on the composite exhibited higher alkaline phosphatase (ALP) activity, more calcium nodule-formation, and higher expression levels of osteogenic differentiation-related genes than cells grown on PEEK or UHMWPE. These results indicated that the incorporation of n-CS to PEEK could greatly improve the bioactivity and biocompatibility of the composite. Thus, the n-CS/PEEK composite may be a promising bone repair material for use in orthopedic clinics.
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Affiliation(s)
- Rui Ma
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine , Shanghai 200011, China
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29
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Tomaru Y, Hasegawa R, Suzuki T, Sato T, Kubosaki A, Suzuki M, Kawaji H, Forrest ARR, Hayashizaki Y, Shin JW, Suzuki H. A transient disruption of fibroblastic transcriptional regulatory network facilitates trans-differentiation. Nucleic Acids Res 2014; 42:8905-13. [PMID: 25013174 PMCID: PMC4132712 DOI: 10.1093/nar/gku567] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Revised: 06/11/2014] [Accepted: 06/11/2014] [Indexed: 12/15/2022] Open
Abstract
Transcriptional Regulatory Networks (TRNs) coordinate multiple transcription factors (TFs) in concert to maintain tissue homeostasis and cellular function. The re-establishment of target cell TRNs has been previously implicated in direct trans-differentiation studies where the newly introduced TFs switch on a set of key regulatory factors to induce de novo expression and function. However, the extent to which TRNs in starting cell types, such as dermal fibroblasts, protect cells from undergoing cellular reprogramming remains largely unexplored. In order to identify TFs specific to maintaining the fibroblast state, we performed systematic knockdown of 18 fibroblast-enriched TFs and analyzed differential mRNA expression against the same 18 genes, building a Matrix-RNAi. The resulting expression matrix revealed seven highly interconnected TFs. Interestingly, suppressing four out of seven TFs generated lipid droplets and induced PPARG and CEBPA expression in the presence of adipocyte-inducing medium only, while negative control knockdown cells maintained fibroblastic character in the same induction regime. Global gene expression analyses further revealed that the knockdown-induced adipocytes expressed genes associated with lipid metabolism and significantly suppressed fibroblast genes. Overall, this study reveals the critical role of the TRN in protecting cells against aberrant reprogramming, and demonstrates the vulnerability of donor cell's TRNs, offering a novel strategy to induce transgene-free trans-differentiations.
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Affiliation(s)
- Yasuhiro Tomaru
- RIKEN Omics Science Center, 1-7-22 Suehiro-cho, Tsurumi-Ku, Yokohama 230-0045, Japan
| | - Ryota Hasegawa
- RIKEN Center for Life Science Technologies, Division of Genomic Technologies, 1-7-22 Suehiro-cho, Tsurumi-Ku, Yokohama 230-0045, Japan Division of Genomic Information Resources, International Graduate School of Arts and Sciences, Yokohama City University, Yokohama 230-0045, Japan
| | - Takahiro Suzuki
- RIKEN Omics Science Center, 1-7-22 Suehiro-cho, Tsurumi-Ku, Yokohama 230-0045, Japan RIKEN Center for Life Science Technologies, Division of Genomic Technologies, 1-7-22 Suehiro-cho, Tsurumi-Ku, Yokohama 230-0045, Japan
| | - Taiji Sato
- Discovery Pharmacology Department 1, Research Division, Chugai Pharmaceutical Co., Ltd, 1-135 Komakado, Gotemba, Shizuoka 412-8513, Japan
| | - Atsutaka Kubosaki
- RIKEN Omics Science Center, 1-7-22 Suehiro-cho, Tsurumi-Ku, Yokohama 230-0045, Japan
| | - Masanori Suzuki
- RIKEN Omics Science Center, 1-7-22 Suehiro-cho, Tsurumi-Ku, Yokohama 230-0045, Japan Division of Genomic Information Resources, International Graduate School of Arts and Sciences, Yokohama City University, Yokohama 230-0045, Japan
| | - Hideya Kawaji
- RIKEN Omics Science Center, 1-7-22 Suehiro-cho, Tsurumi-Ku, Yokohama 230-0045, Japan RIKEN Center for Life Science Technologies, Division of Genomic Technologies, 1-7-22 Suehiro-cho, Tsurumi-Ku, Yokohama 230-0045, Japan RIKEN Preventive Medicine and Diagnosis Innovative Program, Wako, Saitama 351-0198, Japan
| | - Alistair R R Forrest
- RIKEN Omics Science Center, 1-7-22 Suehiro-cho, Tsurumi-Ku, Yokohama 230-0045, Japan RIKEN Center for Life Science Technologies, Division of Genomic Technologies, 1-7-22 Suehiro-cho, Tsurumi-Ku, Yokohama 230-0045, Japan
| | - Yoshihide Hayashizaki
- RIKEN Omics Science Center, 1-7-22 Suehiro-cho, Tsurumi-Ku, Yokohama 230-0045, Japan RIKEN Preventive Medicine and Diagnosis Innovative Program, Wako, Saitama 351-0198, Japan
| | - Jay W Shin
- RIKEN Omics Science Center, 1-7-22 Suehiro-cho, Tsurumi-Ku, Yokohama 230-0045, Japan RIKEN Center for Life Science Technologies, Division of Genomic Technologies, 1-7-22 Suehiro-cho, Tsurumi-Ku, Yokohama 230-0045, Japan
| | - Harukazu Suzuki
- RIKEN Omics Science Center, 1-7-22 Suehiro-cho, Tsurumi-Ku, Yokohama 230-0045, Japan RIKEN Center for Life Science Technologies, Division of Genomic Technologies, 1-7-22 Suehiro-cho, Tsurumi-Ku, Yokohama 230-0045, Japan
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Li J, Zhang N, Huang X, Xu J, Fernandes JC, Dai K, Zhang X. Dexamethasone shifts bone marrow stromal cells from osteoblasts to adipocytes by C/EBPalpha promoter methylation. Cell Death Dis 2013; 4:e832. [PMID: 24091675 PMCID: PMC3824658 DOI: 10.1038/cddis.2013.348] [Citation(s) in RCA: 130] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Revised: 08/01/2013] [Accepted: 08/12/2013] [Indexed: 01/09/2023]
Abstract
Dexamethasone (Dex)-induced osteoporosis has been described as the most severe side effect in long-term glucocorticoid therapy. The decreased bone mass and the increased marrow fat suggest that Dex possibly shifts the differentiation of bone marrow stromal cells (BMSCs) to favor adipocyte over osteoblast, but the underlying mechanisms are still unknown. In this paper, we established a Dex-induced osteoporotic mouse model, and found that BMSCs from Dex-treated mice are more likely to differentiate into adipocyte than those from control mice, even under the induction of bone morphogenetic protein-2 (BMP2). We also discovered both in vitro and in vivo that the expression level of adipocyte regulator CCAAT/enhancer-binding protein alpha (C/EBPalpha) is significantly upregulated in Dex-induced osteoporotic BMSCs during osteoblastogenesis by a mechanism that involves inhibited DNA hypermethylation of its promoter. Knockdown of C/EBPalpha in Dex-induced osteoporotic cells rescues their differentiation potential, suggesting that Dex shifts BMSC differentiation by inhibiting C/EBPalpha promoter methylation and upregulating its expression level. We further found that the Wnt/beta-catenin pathway is involved in Dex-induced osteoporosis and C/EBPalpha promoter methylation, and its activation by LiCl rescues the effect of Dex on C/EBPalpha promoter methylation and osteoblast/adipocyte balance. This study revealed the C/EBPalpha promoter methylation mechanism and evaluated the function of Wnt/beta-catenin pathway in Dex-induced osteoporosis, providing a useful therapeutic target for this type of osteoporosis.
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Affiliation(s)
- J Li
- The Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Institutes for Biological Sciences (SIBS), Chinese Academy of Sciences (CAS), Shanghai Jiao Tong University School of Medicine (SJTUSM), China
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31
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Zhao QH, Wang SG, Liu SX, Li JP, Zhang YX, Sun ZY, Fan QM, Tian JW. PPARγ forms a bridge between DNA methylation and histone acetylation at the C/EBPα gene promoter to regulate the balance between osteogenesis and adipogenesis of bone marrow stromal cells. FEBS J 2013; 280:5801-14. [PMID: 23981481 DOI: 10.1111/febs.12500] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Revised: 07/07/2013] [Accepted: 08/16/2013] [Indexed: 11/28/2022]
Abstract
The balance between osteogenesis and adipogenesis of bone marrow stromal cells is impaired in many human diseases. Knowledge of how to fine-tune this balance is of medical importance. CCAAT/enhancer binding protein α (C/EBPα) has been shown to regulate the balance between osteogenesis and adipogenesis of C3H10T1/2 cells, with epigenetic modifications of the C/EBPα promoter playing an important role. The present study aimed to elucidate the underlying molecular mechanisms. The results showed that peroxisome proliferator-activated receptor γ (PPARγ) binds the -1286 bp/-1065 bp region of the C/EBPα promoter to activate C/EBPα expression during osteogenesis and adipogenesis of C3H10T1/2 cells. DNA hypermethylation in the -1286 bp/-1065 bp region, observed at the terminal stage of osteogenesis, prevented PPARγ binding, and then histone deacetylase 1 (HDAC1) occupied this region to reduce the level of histone acetylation. We regulated the balance between osteogenesis and adipogenesis of mouse bone marrow stromal cells through modulation of DNA methylation and histone acetylation status. In addition, in bone marrow stromal cells from the glucocorticoid-induced osteoporosis (GIO) mouse, hypomethylation of CpG sites, higher binding of PPARγ, acetylated histones 3 and 4, and reduced binding of HDAC1 in the -1286 bp/-1065 bp region of C/EBPα promoter were observed, compared with normal mice. This study provides a deeper insight into the molecular mechanisms underlying the balance between osteogenesis and adipogenesis regulated by C/EBPα in synergy with PPARγ, and suggests a molecular model for how DNA methylation and histone acetylation are linked by PPARγ to regulate differentiation of bone marrow stromal cells.
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Affiliation(s)
- Qing-Hua Zhao
- Department of Orthopaedics, Shanghai First People's Hospital, School of Medicine, Shanghai Jiaotong University, China
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32
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Feng J, Yang G, Yuan G, Gluhak-Heinrich J, Yang W, Wang L, Chen Z, Schulze McDaniel J, Donly KJ, Harris SE, Macdougall M, Chen S. Abnormalities in the enamel in bmp2-deficient mice. Cells Tissues Organs 2011; 194:216-21. [PMID: 21597270 DOI: 10.1159/000324644] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Tooth development is regulated by epithelial-mesenchymal interactions and their reciprocal molecular signaling. Bone morphogenetic protein 2 (Bmp2) is essential for tooth formation. However, the role of Bmp2 during enamel formation remains unknown in vivo. In this study, the role of Bmp2 in the regulation of postnatal enamel formation was investigated via the conditional ablation of Bmp2 in enamel using the (Osx-Cre) mouse. Bmp2 gene ablation was confirmed by PCR analysis in Osx-Cre, Bmp2(flox/flox) mice. Bmp2-null mice displayed a severe and profound tooth phenotype with asymmetric and open forked incisors. Microradiographs revealed broken incisor tips and dental pulp chamber exposure. The enamel layer of incisors and molars was thin with hypomineralization. Scanning electron microscopy analysis showed that the enamel surface was rough with chipping and the enamel lacked a typical prismatic architecture. These results demonstrate that Bmp2 is essential for enamel formation.
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Affiliation(s)
- Junsheng Feng
- The University of Texas Health Science Center at San Antonio, San Antonio, Tex., USA
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Cheng H, Qiu L, Zhang H, Cheng M, Li W, Zhao X, Liu K, Lei L, Ma J. Arsenic trioxide promotes senescence and regulates the balance of adipogenic and osteogenic differentiation in human mesenchymal stem cells. Acta Biochim Biophys Sin (Shanghai) 2011; 43:204-9. [PMID: 21257625 DOI: 10.1093/abbs/gmq130] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Arsenic trioxide (ATO) as an anti-tumor drug could induce differentiation and apoptosis in tumor cells. Mesenchymal stem cells (MSCs) play important roles in the hematogenesis of bone marrow. Many reports have shown that the disorder of MSC adipogenic and osteogenic differentiation occurs in some diseases. However, reports about the effects of ATO on MSCs are limited. In this study, we found that 1 μM ATO promoted MSC senescence mainly through p21, although it had no effect on apoptosis at this dose. Furthermore, ATO promoted adipogenic differentiation, but inhibited osteogenic differentiation in MSCs. Our study also showed that CCAAT/enhancer-binding protein alpha C/EBPα and peroxisome proliferator-activated receptor gamma PPARγ might be involved in the regulation of adipogenic and osteogenic differentiation induced by ATO. Our results indicated that ATO may exert an anti-tumor effect by influencing bone marrow micro-environment. Moreover, it may regulate the adipogenic and osteogenic differentiation of MSCs.
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Affiliation(s)
- Huanchen Cheng
- Department of Histology and Embryology, Harbin Medical University, Harbin, China
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Replicative senescence of human bone marrow and umbilical cord derived mesenchymal stem cells and their differentiation to adipocytes and osteoblasts. Mol Biol Rep 2010; 38:5161-8. [PMID: 21188535 DOI: 10.1007/s11033-010-0665-2] [Citation(s) in RCA: 111] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2010] [Accepted: 11/08/2010] [Indexed: 12/19/2022]
Abstract
Mesenchymal stem cells (MSC) which have self-renewal and multiple differentiation potential in vitro play important roles in regenerative medicine and tissue engineering. However, long-term culture in vitro leads to senescence which results in the growth arrest and reduction of differentiation. In this study, MSC derived from human bone-marrow (BM-MSC) and umbilical cord (UC-MSC) were cultured in vitro lasted to senescence. Senescence and apoptosis detection showed that the senescent cells increased significantly but the increase of apoptosis was not significant in the long term culture. Senescence related genes p16, p21 and p53 increased gradually in BM-MSC. However, p16 and p53 reduced and then increased but with the gradual increase of p21 in UC-MSC. Adipogenic differentiation decreased whereas the propensity for osteogenic differentiation increased in senescent MSC. Real time RT-PCR demonstrated that both C/EBPα and PPARγ decreased in senescent BM-MSC. However, in UC-MSC, PPARγ decreased but C/EBPα increased in late phase compared to early phase. The study demonstrated p21 was important in the senescence of BM-MSC and UC-MSC. C/EBPα and PPARγ could regulate the balance of adipogenic differentiation in BM-MSC but only PPARγ not C/EBPα was involved in the adipogenic differentiation in UC-MSC.
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35
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Prokesch A, Bogner-Strauss JG, Hackl H, Rieder D, Neuhold C, Walenta E, Krogsdam A, Scheideler M, Papak C, Wong WC, Vinson C, Eisenhaber F, Trajanoski Z. Arxes: retrotransposed genes required for adipogenesis. Nucleic Acids Res 2010; 39:3224-39. [PMID: 21177646 PMCID: PMC3082915 DOI: 10.1093/nar/gkq1289] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Retrotransposed sequences arise from messenger RNAs (mRNAs) that have been reinserted into genomic DNA by reverse transcription. Usually, these sequences are embedded in dormant regions, collect missense mutations over time and constitute processed, nonfunctional pseudogenes. There are thousands of processed pseudogenes in the mouse and human genome. Here, we report evidence for two paralog genes (termed Arxes1 and Arxes2), which arose by retrotransposition of the signal peptidase Spcs3 followed by a segmental duplication event. They gained a functional promoter that we show to be transactivated by adipogenic transcription factors. We further show that the Arxes mRNAs are highly expressed in adipose tissue and strongly upregulated during adipogenesis in different cell models. Additionally, their expression is elevated by an anti-diabetic agent in vitro and in vivo. Importantly, we provide evidence that the Arxes genes are translated and that the proteins are located in the endoplasmic reticulum. Although the sequence similarity and subcellular location are reminiscent of their parental gene, our data suggest that the Arxes have developed a different function, since their expression is required for adipogenesis, whereas Spcs3 is dispensable. In summary, we report retrotransposed-duplicated genes that evolved from a parental gene to function in a tissue and adipogenesis-specific context.
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Affiliation(s)
- Andreas Prokesch
- Institute for Genomics and Bioinformatics, Graz University of Technology, Biocenter, Austria.
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