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Chen CH, Chen WC, Lin CY, Chen CH, Tsuang YH, Kuo YJ. Sintered dicalcium pyrophosphate treatment attenuates estrogen deficiency-associated disc degeneration in ovariectomized rats. DRUG DESIGN DEVELOPMENT AND THERAPY 2018; 12:3033-3041. [PMID: 30271118 PMCID: PMC6151093 DOI: 10.2147/dddt.s170816] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Background Estrogen deficiency is associated with musculoskeletal disorders. Sintered dicalcium pyrophosphate (SDCP) is a novel antiosteoporotic agent. In this study, we examined its use for restoration of bone quality and attenuation of disc degeneration in ovariectomy rats. Methods Sixty female Sprague Dawley rats were randomly divided into 3 groups, namely sham group undergoing sham surgery, ovariectomy (OVX) group receiving an equivalent volume of isotonic sodium chloride solution, and OVX/SDCP group orally administered with 0.25 mg/mL SDCP. Animals were sacrificed at 3 and 6 months post ovariectomy and lumbar vertebrae and intervertebral discs were harvested. Bone mineral density, micro-computed tomography analysis, and biomechanical testing were performed to assess bone quality. Histological analysis with hematoxylin and eosin, Alcian blue, and Masson’s trichrome stain were conducted to determine disc degeneration. Immunohistochemistry and real-time PCR were carried out to measure the expressions of aggrecan, type I collagen, type II collagen, and MMP-1, MMP-3, and MMP-13. Results SDCP improved bone quality as observed by the results of increased bone mineral density and stiffness in OVX rats. The improvement in disc degeneration induced by estrogen withdrawal was associated with reduced gene expressions of MMPs and increased production of collagen type II. Conclusion SDCP prevents osteoporosis and ameliorates disc degeneration in OVX rats. It represents a favorable therapeutic agent for osteoporotic and osteoarthritic conditions in clinical practice.
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Affiliation(s)
- Chia-Hsien Chen
- Department of Orthopedics, Shuang Ho Hospital, Taipei Medical University, New Taipei, Taiwan.,Department of Orthopedic Surgery, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan, .,School of Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei, Taiwan
| | - Wei-Chuan Chen
- Graduate School of Biotechnology and Bioengineering, Yuan Ze University, Taoyuan City, Taiwan
| | - Chun-Yi Lin
- Department of Orthopedic Surgery, Taipei Medical University Hospital, Taipei, Taiwan
| | - Chih-Hwa Chen
- Department of Orthopedics, Shuang Ho Hospital, Taipei Medical University, New Taipei, Taiwan.,Department of Orthopedic Surgery, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan, .,School of Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei, Taiwan
| | - Yang-Hwei Tsuang
- Department of Orthopedics, Shuang Ho Hospital, Taipei Medical University, New Taipei, Taiwan.,Department of Orthopedic Surgery, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan,
| | - Yi-Jie Kuo
- Department of Orthopedic Surgery, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan, .,Department of Orthopedic Surgery, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan,
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Tsai YF, Hsu LH, Wu CC, Cai WH, Yang KC, Fan FY. Long-Term Oral Toxicity and Anti-osteoporotic Effect of Sintered Dicalcium Pyrophosphate in Rat Model of Postmenopausal Osteoporosis. J Med Biol Eng 2017; 37:181-190. [PMID: 29930493 PMCID: PMC5990578 DOI: 10.1007/s40846-016-0197-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Accepted: 04/07/2016] [Indexed: 11/29/2022]
Abstract
Sintered dicalcium pyrophosphate (SDCP), a synthetic pyrophosphate analog, has shown potential for the management of osteoporosis. The long-term oral toxicity and anti-osteoporotic effect of SDCP in a postmenopausal osteoporosis rat model were evaluated in this study. SDCP was orally administered to bilateral ovariectomized (OVX) Wistar rats at a dose of 0.75 mg/kg daily for 24 weeks following by 2 weeks of observation. There were no abnormal findings in clinical signs of toxicity, food consumption, body weight, blood examination, necropsy, and histological inspection attributable to the ingestion of SDCP. The serum level of type I collagen fragments, a bone resorption marker, decreased in SDCP-treated rats, and the bone formation markers alkaline phosphatase, osteocalcin, and osteopontin significantly decreased. These findings indicate that the bone turnover rate decreased in SDCP-treated animals. Relative to OVX rats, the increase in serum tartrate-resistant acid phosphatase 5b level represents an increase in bony tissues in the SDCP-treated rats. Histological examinations of distal femoral metaphyses further revealed that the ingestion of SDCP improved the trabecular bone architecture and decreased bone porosity. Analysis of limb bone ashes showed a significant increase in bone mineral content. Our results show that SDCP inhibits bone resorption to restore bone mass in OVX rats without deleterious effects, and therefore that SDCP has potential in the management of osteoporosis.
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Affiliation(s)
- Yuh-Feng Tsai
- 1Department of Diagnostic Radiology, Shin-Kong Wu Ho-Su Memorial Hospital, Taipei City, 111 Taiwan.,2School of Medicine, Fu-Jen Catholic University, New Taipei City, 24205 Taiwan
| | - Li-Ho Hsu
- 3Department of Orthopedics, En Chu Kong Hospital, New Taipei City, 23702 Taiwan.,4Department of Orthopedics, College of Medicine, National Taiwan University Hospital, National Taiwan University, Taipei City, 10002 Taiwan
| | - Chang-Chin Wu
- 3Department of Orthopedics, En Chu Kong Hospital, New Taipei City, 23702 Taiwan.,4Department of Orthopedics, College of Medicine, National Taiwan University Hospital, National Taiwan University, Taipei City, 10002 Taiwan.,5Department of Biomedical Engineering, Yuanpei University of Medical Technology, Hsinchu, 30015 Taiwan
| | - Wei-Hua Cai
- 6School of Dental Technology, College of Oral Medicine, Taipei Medical University, 250 Wu-Hsing Street, Taipei City, 11031 Taiwan
| | - Kai-Chiang Yang
- 6School of Dental Technology, College of Oral Medicine, Taipei Medical University, 250 Wu-Hsing Street, Taipei City, 11031 Taiwan
| | - Fang-Yu Fan
- 6School of Dental Technology, College of Oral Medicine, Taipei Medical University, 250 Wu-Hsing Street, Taipei City, 11031 Taiwan
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Chen L, Yang L, Yao M, Cui XJ, Xue CC, Wang YJ, Shu B. Biomechanical Characteristics of Osteoporotic Fracture Healing in Ovariectomized Rats: A Systematic Review. PLoS One 2016; 11:e0153120. [PMID: 27055104 PMCID: PMC4824477 DOI: 10.1371/journal.pone.0153120] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Accepted: 03/23/2016] [Indexed: 11/19/2022] Open
Abstract
Biomechanical tests are widely used in animal studies on osteoporotic fracture healing. However, the biomechanical recovery process is still unknown, leading to difficulty in choosing time points for biomechanical tests and in correctly assessing osteoporotic fracture healing. To determine the biomechanical recovery process during osteoporotic fracture healing, studies on osteoporotic femur fracture healing with biomechanical tests in ovariectomized rat (OVX) models were collected from PUBMED, EMBASE, and Chinese databases. Quadratic curves of fracture healing time and maximum load were fitted with data from the analyzed studies. In the fitted curve for normal fractures, the predicted maximum load was 145.56 N, and the fracture healing time was 88.0 d. In the fitted curve for osteoporotic fractures, the predicted maximum load was 122.30 N, and the fracture healing time was 95.2 d. The maximum load of fractured femurs in OVX rats was also lower than that in sham rats at day 84 post-fracture (D84 PF). The fracture healing time was prolonged and maximum load at D84 PF decreased in OVX rats with closed fractures. The maximum load of Wister rats was higher than that of Sprague-Dawley (SD) rats, but the fracture healing time of SD and Wister rats was similar. Osteoporotic fracture healing was delayed in rats that were < = 12 weeks old when ovariectomized, and at D84 PF, the maximum load of rats < = 12 weeks old at ovariectomy was lower than that of rats >12 weeks old at ovariectomy. There was no significant difference in maximum load at D84 PF between rats with an osteoporosis modeling time <12 weeks and > = 12 weeks. In conclusion, fracture healing was delayed and biomechanical property decreased by osteoporosis. Time points around D95.2 PF should be considered for biomechanical tests of osteoporotic femur fracture healing in OVX rat models. Osteoporotic fracture healing in OVX rats was affected by the fracture type but not by the strain of the rat.
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Affiliation(s)
- Lin Chen
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Spine Research Institute, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Long Yang
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Spine Research Institute, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Min Yao
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Spine Research Institute, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xue-Jun Cui
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Spine Research Institute, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Chun-Chun Xue
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Spine Research Institute, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yong-Jun Wang
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Spine Research Institute, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Bing Shu
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Spine Research Institute, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- * E-mail:
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