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Hadjicharalambous C, Alpantaki K, Chatzinikolaidou M. Effects of NSAIDs on pre-osteoblast viability and osteogenic differentiation. Exp Ther Med 2021; 22:740. [PMID: 34046094 DOI: 10.3892/etm.2021.10172] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Accepted: 10/28/2020] [Indexed: 12/13/2022] Open
Abstract
Non-steroidal anti-inflammatory drugs (NSAIDs) are widely used in the treatment of a variety of musculoskeletal conditions, injuries and after surgery for postoperative pain management. Their use has been associated with impaired bone healing, possibly due to a multifactorial function, which may include inhibition of osteoblast recruitment and differentiation. However, up to date, there is no consensus regarding the impact of NSAIDs on bone-healing. The aim of the current study was to investigate the effects of five NSAIDs on the cellular functions of mouse MC3T3-E1 pre-osteoblasts. Cells were treated with the non-selective COX inhibitors lornoxicam and diclofenac, the COX-2 selective inhibitors parecoxib, meloxicam and paracetamol, as well as steroidal prednisolone at different doses and exposure times. The PrestoBlue™ technique was used to measure cell viability, an enzymatic assay was employed for alkaline phosphatase (ALP) activity and alizarin red S mineral staining was used to determine osteogenic differentiation. All drugs had a negative impact on pre-osteoblast cell growth, with the exception of paracetamol. Lornoxicam, diclofenac and meloxicam reduced ALP activity, while the other NSAIDs had no effect and prednisolone strongly increased ALP activity. In contrast, calcium deposits were either unaffected or increased by NSAID treatments but were significantly decreased by prednisolone. These results provide evidence that NSAIDs may adversely affect the viability of mouse pre-osteoblast cells but their actions on the osteogenic differentiation are drug-specific. The direct comparison of the effects of different NSAIDs and prednisolone on pre-osteoblasts may serve to place some NSAIDs in a preferential position for analgesic and anti-inflammatory therapy during bone repair.
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Affiliation(s)
- Chrystalleni Hadjicharalambous
- Department of Materials Science and Technology, University of Crete, Heraklion 70013, Greece.,Department of Chemistry, University of Crete, Heraklion 70013, Greece
| | - Kalliopi Alpantaki
- Department of Orthopedics and Trauma, Venizeleion General Hospital of Heraklion, Heraklion 71409, Greece
| | - Maria Chatzinikolaidou
- Department of Materials Science and Technology, University of Crete, Heraklion 70013, Greece.,Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology Hellas (FORTH), Heraklion 70013, Greece
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Shi J, Wang L, Zhang H, Jie Q, Li X, Shi Q, Huang Q, Gao B, Han Y, Guo K, Liu J, Yang L, Luo Z. Glucocorticoids: Dose-related effects on osteoclast formation and function via reactive oxygen species and autophagy. Bone 2015; 79:222-32. [PMID: 26115910 DOI: 10.1016/j.bone.2015.06.014] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 06/15/2015] [Accepted: 06/17/2015] [Indexed: 01/09/2023]
Abstract
Whether glucocorticoids directly enhance or interrupt osteoclastogenesis is still a controversial subject. In this study, we ascertained the dose-dependent positive effects of glucocorticoids on osteoclastogenesis in vivo and in vitro as well as investigated the mechanism in vitro. As the dose of glucocorticoids increased, osteoclastogenesis was stimulated at 0.1 μM, a peak was achieved at 1 μM and a corresponding decrease occurred at 10 μM. Reactive oxygen species (ROS), which play a crucial role in osteoclastogenesis, and autophagy flux activity, a cellular recycling process, were consistently up-regulated along with the dose-dependent effects of the glucocorticoids on osteoclast formation and function. N-acetyl-cysteine (NAC), a ROS scavenger, abrogated the effects of the glucocorticoids on autophagy and osteoclastogenesis. Moreover, 3-methyladenine (3-MA), an autophagy inhibitor, interrupted osteoclastogenesis stimulation by the glucocorticoids. These results implied that with glucocorticoid administration, ROS and autophagy, as a downstream factor of ROS, played vital roles in osteoclast formation and function. 3-MA administration did not enhance ROS accumulation, so that autophagy had no effect on ROS induced by glucocorticoids. Our investigation demonstrated that glucocorticoids had dose-dependent positive effects on osteoclast formation and function via ROS and autophagy. These results provide support for ROS and autophagy as therapeutic targets in glucocorticoid-related bone loss diseases such as glucocorticoid-induced osteoporosis.
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Affiliation(s)
- Jun Shi
- Institute of Orthopedics, Xijing Hospital, Fourth Military Medical University, China
| | - Long Wang
- Institute of Orthopedics, Xijing Hospital, Fourth Military Medical University, China
| | - Hongyang Zhang
- Institute of Orthopedics, Xijing Hospital, Fourth Military Medical University, China
| | - Qiang Jie
- Institute of Orthopedics, Xijing Hospital, Fourth Military Medical University, China
| | - Xiaojie Li
- Institute of Orthopedics, Xijing Hospital, Fourth Military Medical University, China
| | - Qiyue Shi
- Institute of Orthopedics, Xi'an Chinese Medicine Hospital, China
| | - Qiang Huang
- Institute of Orthopedics, Xijing Hospital, Fourth Military Medical University, China
| | - Bo Gao
- Institute of Orthopedics, Xijing Hospital, Fourth Military Medical University, China
| | - Yuehu Han
- Institute of Orthopedics, Xijing Hospital, Fourth Military Medical University, China
| | - Kai Guo
- Institute of Orthopedics, Xijing Hospital, Fourth Military Medical University, China
| | - Jian Liu
- Institute of Orthopedics, Xijing Hospital, Fourth Military Medical University, China.
| | - Liu Yang
- Institute of Orthopedics, Xijing Hospital, Fourth Military Medical University, China.
| | - Zhuojing Luo
- Institute of Orthopedics, Xijing Hospital, Fourth Military Medical University, China.
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Hong MH, Choi HJ, Ko YM, Lee YK. Engineered microstructure granules for tailored drug release rate. Biotechnol Bioeng 2015; 112:1936-47. [DOI: 10.1002/bit.25595] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Revised: 02/24/2015] [Accepted: 03/04/2015] [Indexed: 12/19/2022]
Affiliation(s)
- Min-Ho Hong
- Department of Materials Science and Engineering; Yonsei University; Seodaemun-gu Seoul Korea
| | - Heon-Jin Choi
- Department of Materials Science and Engineering; Yonsei University; Seodaemun-gu Seoul Korea
| | - Yeong-Mu Ko
- Research Center for Oral Disease Regulation of the Aged; Chosun University School of Dentistry; 309 Pilmun-daero Dong-gu Gwangju 501-759 Korea
| | - Yong-Keun Lee
- Research Center for Oral Disease Regulation of the Aged; Chosun University School of Dentistry; 309 Pilmun-daero Dong-gu Gwangju 501-759 Korea
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Shi C, Huang P, Kang H, Hu B, Qi J, Jiang M, Zhou H, Guo L, Deng L. Glucocorticoid inhibits cell proliferation in differentiating osteoblasts by microRNA-199a targeting of WNT signaling. J Mol Endocrinol 2015; 54:325-37. [PMID: 25878056 DOI: 10.1530/jme-14-0314] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/15/2015] [Indexed: 11/08/2022]
Abstract
The inhibition of osteoblast proliferation by glucocorticoids (GCs) is very important in the etiology of GC-induced osteoporosis. The mechanisms of this process are still not fully understood. The results of recent studies have indicated an important role for microRNAs in GC-mediated responses in various cellular processes, including cell proliferation and apoptosis. Therefore, we developed the hypothesis that these regulatory molecules might be involved in GC-decreased osteoblast proliferation. Western blotting, quantitative real-time PCR, cell proliferation assays, and luciferase assays were employed to investigate the role of miRNAs in GC-inhibited osteoblast proliferation. microRNA-199a-5p was significantly increased in osteoblasts treated with dexamethasone (Dex). To delineate the role of microRNA-199a-5p, we silenced and overexpressed microRNA-199a-5p in osteoblasts. We found that overexpressing microRNA-199a-5p remarkably increased the inhibition effect of Dex on osteoblast proliferation, and depleting microRNA-199a-5p significantly attenuated Dex-inhibited osteoblast proliferation. Results of mechanistic studies indicated that microRNA-199a-5p inhibited FZD4 and WNT2 expression through a microRNA-199a-5p binding site within the 3'-UTR of FZD4 and WNT2. The post-transcriptional repression of FZD4 and WNT2 were further confirmed by luciferase reporter assay. These results indicated that microRNA-199a-5p may play a significant role in GC-inhibited osteoblast proliferation by regulating the WNT signaling pathway.
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Affiliation(s)
- Changgui Shi
- Shanghai Key Laboratory for Bone and Joint DiseasesShanghai Institute of Orthopaedics and Traumatology, Shanghai Ruijin Hospital, Shanghai Jiaotong University School of Medicine, No.197, The Second Ruijin Road, Luwan District, Shanghai 200025, People's Republic of ChinaDepartment of OrthopedicsChangzheng Hospital, The Second Military Medical University of China, Shanghai, People's Republic of China Shanghai Key Laboratory for Bone and Joint DiseasesShanghai Institute of Orthopaedics and Traumatology, Shanghai Ruijin Hospital, Shanghai Jiaotong University School of Medicine, No.197, The Second Ruijin Road, Luwan District, Shanghai 200025, People's Republic of ChinaDepartment of OrthopedicsChangzheng Hospital, The Second Military Medical University of China, Shanghai, People's Republic of China
| | - Ping Huang
- Shanghai Key Laboratory for Bone and Joint DiseasesShanghai Institute of Orthopaedics and Traumatology, Shanghai Ruijin Hospital, Shanghai Jiaotong University School of Medicine, No.197, The Second Ruijin Road, Luwan District, Shanghai 200025, People's Republic of ChinaDepartment of OrthopedicsChangzheng Hospital, The Second Military Medical University of China, Shanghai, People's Republic of China
| | - Hui Kang
- Shanghai Key Laboratory for Bone and Joint DiseasesShanghai Institute of Orthopaedics and Traumatology, Shanghai Ruijin Hospital, Shanghai Jiaotong University School of Medicine, No.197, The Second Ruijin Road, Luwan District, Shanghai 200025, People's Republic of ChinaDepartment of OrthopedicsChangzheng Hospital, The Second Military Medical University of China, Shanghai, People's Republic of China
| | - Bo Hu
- Shanghai Key Laboratory for Bone and Joint DiseasesShanghai Institute of Orthopaedics and Traumatology, Shanghai Ruijin Hospital, Shanghai Jiaotong University School of Medicine, No.197, The Second Ruijin Road, Luwan District, Shanghai 200025, People's Republic of ChinaDepartment of OrthopedicsChangzheng Hospital, The Second Military Medical University of China, Shanghai, People's Republic of China Shanghai Key Laboratory for Bone and Joint DiseasesShanghai Institute of Orthopaedics and Traumatology, Shanghai Ruijin Hospital, Shanghai Jiaotong University School of Medicine, No.197, The Second Ruijin Road, Luwan District, Shanghai 200025, People's Republic of ChinaDepartment of OrthopedicsChangzheng Hospital, The Second Military Medical University of China, Shanghai, People's Republic of China
| | - Jin Qi
- Shanghai Key Laboratory for Bone and Joint DiseasesShanghai Institute of Orthopaedics and Traumatology, Shanghai Ruijin Hospital, Shanghai Jiaotong University School of Medicine, No.197, The Second Ruijin Road, Luwan District, Shanghai 200025, People's Republic of ChinaDepartment of OrthopedicsChangzheng Hospital, The Second Military Medical University of China, Shanghai, People's Republic of China
| | - Min Jiang
- Shanghai Key Laboratory for Bone and Joint DiseasesShanghai Institute of Orthopaedics and Traumatology, Shanghai Ruijin Hospital, Shanghai Jiaotong University School of Medicine, No.197, The Second Ruijin Road, Luwan District, Shanghai 200025, People's Republic of ChinaDepartment of OrthopedicsChangzheng Hospital, The Second Military Medical University of China, Shanghai, People's Republic of China
| | - Hanbing Zhou
- Shanghai Key Laboratory for Bone and Joint DiseasesShanghai Institute of Orthopaedics and Traumatology, Shanghai Ruijin Hospital, Shanghai Jiaotong University School of Medicine, No.197, The Second Ruijin Road, Luwan District, Shanghai 200025, People's Republic of ChinaDepartment of OrthopedicsChangzheng Hospital, The Second Military Medical University of China, Shanghai, People's Republic of China
| | - Lei Guo
- Shanghai Key Laboratory for Bone and Joint DiseasesShanghai Institute of Orthopaedics and Traumatology, Shanghai Ruijin Hospital, Shanghai Jiaotong University School of Medicine, No.197, The Second Ruijin Road, Luwan District, Shanghai 200025, People's Republic of ChinaDepartment of OrthopedicsChangzheng Hospital, The Second Military Medical University of China, Shanghai, People's Republic of China
| | - Lianfu Deng
- Shanghai Key Laboratory for Bone and Joint DiseasesShanghai Institute of Orthopaedics and Traumatology, Shanghai Ruijin Hospital, Shanghai Jiaotong University School of Medicine, No.197, The Second Ruijin Road, Luwan District, Shanghai 200025, People's Republic of ChinaDepartment of OrthopedicsChangzheng Hospital, The Second Military Medical University of China, Shanghai, People's Republic of China
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Hrvačić B, Šitum K, Đurić K, Bošnjak B, Ferenčić Ž, Brajša K, Marković S, Glojnarić I. Relative potencies of three glucocorticoids to induce hypoplasia of the physis and concomitant biochemical alterations in the rat. Drug Chem Toxicol 2014; 38:272-7. [PMID: 25109225 DOI: 10.3109/01480545.2014.947502] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Although inhaled glucocorticoids are known to have systemic effects on bone metabolism, there is little comparative information on their relative potencies. The effects of three standard glucocorticoids in causing changes in bone metabolism and growth, therefore, were investigated in relation to other systemic effects in the rat. Given to male Sprague-Dawley rats, 4.5-5.5 weeks old, subcutaneously (s.c.), at doses of 0.3-10 mg/kg daily for 7 days, beclomethasone dipropionate, prednisolone and ciclesonide all dose-dependently inhibited thymus body mass index (BMI) (by 57%, 44% and 76% at 3 mg/kg). Ciclesonide, potently and prednisolone, less effectively, also repressed femoral bone growth (by 41% and 18% at 10 mg/kg), significantly reducing body weight gain (both by 100% at 10 mg/kg), and serum concentrations of acid phosphatase (ACP) and tartarate resistant acid phosphatase (TRACP) (by >30% at 10 mg/kg); both increased serum glucose and triglycerides levels. Serum alkaline phosphatase (ALP) was not affected. Beclomethasone dipropionate had little or no effect on these additional variables. In conclusion, ciclesonide showed pronounced bone growth inhibiting activity after s.c. administration to the rat while other two glucocorticoids showed differences in activity on bone metabolism. However, this model is sufficiently sensitive and specific for testing the effect of glucocorticoids on bone metabolism.
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Affiliation(s)
- Boška Hrvačić
- Galapagos Research Centre Zagreb Limited , Zagreb , Croatia
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Dexamethasone induces osteogenesis via regulation of hedgehog signalling molecules in rat mesenchymal stem cells. INTERNATIONAL ORTHOPAEDICS 2013; 37:1399-404. [PMID: 23645083 DOI: 10.1007/s00264-013-1902-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Accepted: 04/15/2013] [Indexed: 10/26/2022]
Abstract
PURPOSE Hedgehog signalling plays an important role during the development of tissues and organs, including bone and limb. Dexamethasone (DEX), a synthetic and widely used glucocorticoid, affects osteogenesis of bone marrow mesenchymal stem cells (MSCs), while the signalling pathway by which DEX affects osteoblast differentiation remains obscure. This study aimed to investigate expressions of hedgehog signalling molecules Shh, Ihh and Gli1 during DEX-induced osteogenesis of rat MSCs in vitro. METHODS DEX promoted osteoblast differentiation of MSCs at 10(-8) mol/L from seven days to 21 days, demonstrated by enhancing alkaline phosphatase (ALP) activity and osteoblast-associated marker type I collagen expression during osteoblastic differentiation. Gene and protein expressions of hedgehog signalling molecules, Shh, Ihh and Gli1 were tested by RT-PCR and western blot analysis during osteoblast differentiation. RESULTS Shh expression was increased compared to the control while Ihh and Gli1 expressions were decreased on both mRNA and protein level during DEX-induced osteoblast differentiation of MSCs from seven days to 21 days. Altogether, these data demonstrate that DEX can enhance Shh expression via a Gli1-independent mechanism during osteoblast differentiation of MSCs. CONCLUSIONS These results indicate that different patterns of hedgehog signalling are involved in DEX-induced osteogenesis and these findings provide insights into the mechanistic link between glucocorticoid-induced osteogenesis and hedgehog signalling pathway.
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Khojasteh A, Ghahremani MH, Ostad SN, Eslami M, Motahhary P, Morad G, Shidfar S. The effect of deproteinized bovine bone mineral on saos-2 cell proliferation. IRANIAN ENDODONTIC JOURNAL 2013; 8:118-22. [PMID: 23922573 PMCID: PMC3734514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Revised: 05/07/2013] [Accepted: 05/27/2013] [Indexed: 11/06/2022]
Abstract
INTRODUCTION Deproteinized bovine bone mineral (Bio-Oss) is a xenogenic bone substitute, widely used in maxillofacial bone regeneration. The aim of this in vitro study was to investigate its influence on the growth behavior of human osteosarcoma cell line, Saos-2 culture, and compare it with the physiologic dose of Dexamethasone, an inductive factor for osteoblasts. MATERIALS AND METHODS Human osteosarcoma cells, Saos-2, were cultured on Bio-Oss and their growth rate was compared to Saos-2 cultures treated with Dexamethasone 10(-7) M in contrast to cells cultivated in PBS, in the control group. Assessment of proliferation was performed after 24, 36, and 48 hours by counting cells using trypan blue exclusion method. Alkaline phosphatase was measured spectrophotometrically at 405 nm with paranitrophenol buffer. RESULTS After 48 hours, the number of Saos-2 cells increased significantly when subcultured with Bio-Oss. Bio-Oss was more effective on the enhancement of proliferation of Saos-2 cells when compared to the physiologic dose of Dexamethasone (P<0.05). Alkaline phosphatase activity increased in cells grown on Bio-Oss and dexamethasone 10(-7) M in contrast to cells cultivated in PBS control group. The greatest level of activity was observed in the group containing Bio-Oss after 48 hour. CONCLUSION The significant increase of cell proliferation and alkaline phosphatase activity in cells cultured on Bio-Oss, compared to Dexamethasone-treated cells, suggests the important role of this bone substitute in promoting bone regeneration.
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Affiliation(s)
- Arash Khojasteh
- Department of Oral and Maxillofacial Surgery, Research Institute of Dental Sciences, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Hossein Ghahremani
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Seyed Nasser Ostad
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Eslami
- Department of Oral and Maxillofacial Pathology, Tehran University of Medical Sciences, Tehran, Iran,Corresponding author: Arash Khojasteh; Dental Research Center, Dental School, Shahid Beheshti University of Medical Science, Daneshjou Boulevard, Evin, Tehran, Iran, P.O. 19839. Tel: +98-2122413897, Fax: +98-218850768, E-mail:
| | - Pourya Motahhary
- Department of Oral and Maxillofacial Pathology, Tehran University of Medical Sciences, Tehran, Iran
| | - Golnaz Morad
- Dental Research Center, Research Institute of Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Shireen Shidfar
- Gifted and Talented Dental Students Division, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Song X, Song SK, Zhao P, Wei LM, Jiao HS. β-methasone-containing biodegradable poly(lactide-co-glycolide) acid microspheres for intraarticular injection: effect of formulation parameters on characteristics andin vitrorelease. Pharm Dev Technol 2012; 18:1220-9. [DOI: 10.3109/10837450.2011.635152] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Azuma K, Urano T, Ouchi Y, Inoue S. Glucocorticoid-induced gene tripartite motif-containing 63 (TRIM63) promotes differentiation of osteoblastic cells. Endocr J 2010; 57:455-62. [PMID: 20173306 DOI: 10.1507/endocrj.k09e-290] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Glucocorticoids exert their function by regulating glucocorticoid-responsive genes through interaction with glucocorticoid receptor alpha (GRalpha), a nuclear receptor. Glucocorticoids also affect bone metabolism; this is evidenced by the fact that GRalpha is expressed in several kinds of cells in bone tissue, including osteoblasts, osteocytes, osteoclasts, mononuclear cells in bone marrow, and hypertrophic chondrocytes. Glucocorticoids are known to induce osteoblastic differentiation and bone formation. However, this effect of glucocorticoids on bone tissue is still controversial since long-term use of glucocorticoids results in osteoporosis in vivo. To identify glucocorticoid-regulated genes in human osteoblastic cells, SaOS2 cells were treated with dexamethasone (10(-8) M) for 6 hours, and were then subjected to microarray analysis. Genes such as C/EBPdelta, DUSP1, Per1 and TRIM63 were found to be induced by dexamethasone. The induction of mRNAs of these genes by dexamethasone (10(-8) M, 10(-7) M, and 10(-6) M) was confirmed by quantitative real-time polymerase chain reaction (PCR). TRIM63, also called muscle-specific ring finger protein 1 (MuRF1), was reported to be an E3 ubiquitin ligase expressed mainly in muscular tissue. SaOS2 cells overexpressing exogenous TRIM63 showed increased expression of an osteoblastic differentiation marker gene, alkaline phosphatase, with reduced proliferation. These results suggest that TRIM63 is a candidate for genes mediating the glucocorticoid-induced promotion of osteoblastic differentiation.
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Affiliation(s)
- Kotaro Azuma
- Department of Geriatric Medicine, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
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Hong D, Chen HX, Xue Y, Li DM, Wan XC, Ge R, Li JC. Osteoblastogenic effects of dexamethasone through upregulation of TAZ expression in rat mesenchymal stem cells. J Steroid Biochem Mol Biol 2009; 116:86-92. [PMID: 19460432 DOI: 10.1016/j.jsbmb.2009.05.007] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2008] [Revised: 05/04/2009] [Accepted: 05/08/2009] [Indexed: 11/24/2022]
Abstract
Transcriptional coactivator with PDZ-binding motif (TAZ), a beta-catenin-like molecule, drives mesenchymal stem cell (MSC) to differentiate into osteoblast lineage through co-activation of Runx2-dependent gene transcription and repression of peroxisome proliferator-activated receptorgamma (PPARgamma)-dependent gene transcription. Dexamethasone (DEX), a synthetic and widely used glucocorticoid, affects osteogenesis. However, the signaling pathway by which DEX affects osteoblastic differentiation remains obscure. In this study, we found that DEX at the concentration of 10(-8)M enhanced calcium deposition, TAZ, bone morphogenetic protein 2 (BMP-2) and alkaline phosphatase (ALP) expression during osteoblastic differentiation. RU486, an antagonist of glucocorticoid receptor, blocked the improvement of TAZ expression while MSCs were treated with 10(-8)M DEX. Moreover, higher concentration (10(-7)M) of DEX robustly suppressed TAZ and ALP expression in MSCs. These findings suggest that TAZ is not only involved in the signal pathway of BMP-2-induced osteoblastic differentiation, but also involved in the signaling pathway of DEX-induced osteoblastic differentiation, supporting the notion that TAZ is a convergence point of two signaling pathways, BMP-2 signaling pathway and Wnt-beta-catenin signaling pathway.
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Affiliation(s)
- Dun Hong
- Institute of Cell Biology, Medical College of Zhejiang University, 388 Yuhangtang Road, Hangzhou 310058, Zhejiang Province, China
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Bouvard B, Audran M, Legrand E, Chappard D. Ultrastructural characteristics of glucocorticoid-induced osteoporosis. Osteoporos Int 2009; 20:1089-92. [PMID: 19340501 DOI: 10.1007/s00198-009-0864-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- B Bouvard
- INSERM U922 Remodelage osseux et biomatériaux, Service de Rhumatologie CHU Angers, 49933 Angers, France
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