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Chen C, Wu B, Yu H, Dai Z, Yan L, Cai D, Chen S, He L, Lin S, Yao J, Shi J, Lin X, Qiu J, Lin Y, Liu X, Wu W. Oral dehydroepiandrosterone supplementation enhances osteoporotic fracture healing in the OVX rats. Bone 2024; 187:117201. [PMID: 38996859 DOI: 10.1016/j.bone.2024.117201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 07/08/2024] [Accepted: 07/09/2024] [Indexed: 07/14/2024]
Abstract
Osteoporosis easily causes delayed fracture union, even non-union. It has been demonstrated that dehydroepiandrosterone (DHEA) supplementation can increase estrogen levels and improve bone mineral density (BMD) in the elderly, while the role of DHEA on fracture healing remains unknown. This study aimed to elucidate the impact of DHEA supplementation on osteoporotic fracture healing. Seventy-two female Sprague-Dawley rats were used. Forty-eight rats received ovariectomy (OVX), and the remaining rats received a sham OVX operation (sham group). A right transverse femoral osteotomy was performed in all rats at 12 weeks post-OVX. OVX rats were randomly allocated into 2 groups (n = 24 in each group): (i) ovariectomized rats (control group) and (ii) ovariectomized rats treated with DHEA (DHEA group, 5 mg/kg/day). The DHEA supplementation was initiated on the first day post-fracture for 3, 6, and 12 weeks. Fracture healing was evaluated by radiography, histology, biomechanical analysis, and dual-energy X-ray absorptiometry (DEXA). Serum biomarkers were analyzed using enzyme-linked immunosorbent assay (ELISA). At 3 and 6 weeks, radiographs revealed reduced calluses formation and lower radiographic scores in the control group than in other groups. The sham and DHEA groups showed higher BMD and bone mineral content (BMC) at the fracture site than the control group after fracture. Histological analysis revealed the fracture callus was remodeled better in the sham and DHEA groups than in the control group. At the early phase of healing, DHEA supplementation increased osteoblast number, callus area, and cartilage area than the control group. An increased bone area was observed in the DHEA group than in the control group at the late phase of healing. Additionally, improved biomechanical characteristics were observed in both the sham and DHEA groups than those in the control group post-fracture. ELISA showed higher levels of insulin-like growth factor-1 (IGF-1) and 17β-estradiol (E2) in the DHEA group than in the control group post-fracture. Furthermore, the DHEA group exhibited significantly elevated alkaline phosphatase (ALP) and osteocalcin (OC) levels compared to the control group at 6 and 12 weeks. The DHEA group and the control group did not exhibit a notable difference in TRAP-5b levels. The present study demonstrated that the DHEA treatment has a favorable impact on osteoporotic fracture healing by enhancing callus formation, consolidation, and strength in the OVX rats.
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Affiliation(s)
- Chonggang Chen
- Department of Orthopaedic Surgery, The Second Affiliated Hospital of Fujian Medical University, Quanzhou 362000, Fujian, PR China
| | - Baofang Wu
- Department of Orthopaedic Surgery, The Second Affiliated Hospital of Fujian Medical University, Quanzhou 362000, Fujian, PR China
| | - Haiming Yu
- Department of Orthopaedic Surgery, The Second Affiliated Hospital of Fujian Medical University, Quanzhou 362000, Fujian, PR China
| | - Zhangsheng Dai
- Department of Orthopaedic Surgery, The Second Affiliated Hospital of Fujian Medical University, Quanzhou 362000, Fujian, PR China
| | - Lisheng Yan
- Department of Radiology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou 362000, Fujian, PR China
| | - Donglu Cai
- Department of Radiology, The Second Affiliated Hospital of Fujian Medical University, Quanzhou 362000, Fujian, PR China
| | - Shoubo Chen
- Department of Orthopaedic Surgery, The Second Affiliated Hospital of Fujian Medical University, Quanzhou 362000, Fujian, PR China
| | - Lijiang He
- Department of Orthopaedic Surgery, The Second Affiliated Hospital of Fujian Medical University, Quanzhou 362000, Fujian, PR China
| | - Sanfu Lin
- Department of Orthopaedic Surgery, The Second Affiliated Hospital of Fujian Medical University, Quanzhou 362000, Fujian, PR China
| | - Jinzhi Yao
- Department of Orthopaedic Surgery, The Second Affiliated Hospital of Fujian Medical University, Quanzhou 362000, Fujian, PR China
| | - Jinnan Shi
- Department of Orthopaedic Surgery, The Second Affiliated Hospital of Fujian Medical University, Quanzhou 362000, Fujian, PR China
| | - Xiaocong Lin
- Department of Orthopaedic Surgery, The Second Affiliated Hospital of Fujian Medical University, Quanzhou 362000, Fujian, PR China
| | - Jinghu Qiu
- Department of Orthopaedic Surgery, The Second Affiliated Hospital of Fujian Medical University, Quanzhou 362000, Fujian, PR China
| | - Yuxi Lin
- Department of Orthopaedic Surgery, The Second Affiliated Hospital of Fujian Medical University, Quanzhou 362000, Fujian, PR China
| | - Xiaolin Liu
- Department of Orthopaedic Surgery, The Second Affiliated Hospital of Fujian Medical University, Quanzhou 362000, Fujian, PR China
| | - Wenhua Wu
- Department of Orthopaedic Surgery, The Second Affiliated Hospital of Fujian Medical University, Quanzhou 362000, Fujian, PR China.
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Wang H, Sanghvi G, Arefpour A, Alkhayyat A, Soheily A, Jabbarzare S, Salahshour S, Alizadeh A, Baghaei S. Using hardystonite as a biomaterial in biomedical and bone tissue engineering applications. Tissue Cell 2024; 91:102551. [PMID: 39255743 DOI: 10.1016/j.tice.2024.102551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 08/28/2024] [Accepted: 08/30/2024] [Indexed: 09/12/2024]
Abstract
Widespread adoption for substitutes of artificial bone grafts based on proper bioceramics has been generated in recent years. Among them, calcium-silicate-based bioceramics, which possess osteoconductive properties and can directly attach to biological organs, have attracted substantial attention for broad ranges of applications in bone tissue engineering. Approaches exist for a novel strategy to promote the drawbacks of bioceramics such as the incorporation of Zn2+, Mg2+, and Zr4+ ions into calcium-silicate networks, and the improvement of their physical, mechanical, and biological properties. Recently, hardystonite (Ca2ZnSi2O7) bioceramics, as one of the most proper calcium-silicate-based bioceramics, has presented excellent biocompatibility, bioactivity, and interaction. Due to its physical, mechanical, and biological behaviors and ability to be shaped utilizing a variety of fabrication techniques, hardystonite possesses the potential to be applied in biomedical and tissue engineering, mainly bone tissue engineering. A notable potential exists for the newly developed bioceramics to help therapies supply clinical outputs. The promising review paper has been presented by considering major aims to summarize and discuss the most applicable studies carried out for its physical, mechanical, and biological behaviors.
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Affiliation(s)
- Haoyu Wang
- Medical College, Xijing University, Xi'an, Shaanxi 710123, China; Department of Orthopedics, The Second Affiliated Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi 710004, China.
| | - Gaurav Sanghvi
- Marwadi University Research Center, Department of Microbiology, Faculty of Science, Marwadi University, Rajkot, Gujarat 360003, India
| | - Ahmadreza Arefpour
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Ahmad Alkhayyat
- Department of computers Techniques engineering, College of technical engineering, The Islamic University, Najaf, Iraq; Department of computers Techniques engineering, College of technical engineering, The Islamic University of Al Diwaniyah, Al Diwaniyah, Iraq; Department of computers Techniques engineering, College of technical engineering, The Islamic University of Babylon, Babylon, Iraq
| | - Ali Soheily
- Advanced Materials Research Center, Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
| | - Saeid Jabbarzare
- Advanced Materials Research Center, Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
| | - Soheil Salahshour
- Faculty of Engineering and Natural Sciences, Istanbul Okan University, Istanbul, Turkey; Faculty of Engineering and Natural Sciences, Bahcesehir University, Istanbul, Turkey; Department of Computer Science and Mathematics, Lebanese American University, Beirut, Lebanon
| | - As'ad Alizadeh
- Department of Mechanical Engineering, College of Engineering, Urmia University, Urmia, Iran
| | - Sh Baghaei
- Department of mechanical engineering, Khomeinishahr branch, Islamic Azad University, Khomeinishahr, Iran.
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Wu C, Xiao Y, Jiang Y. Associations of blood trace elements with bone mineral density: a population-based study in US adults. J Orthop Surg Res 2023; 18:827. [PMID: 37924110 PMCID: PMC10623864 DOI: 10.1186/s13018-023-04329-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 10/29/2023] [Indexed: 11/06/2023] Open
Abstract
BACKGROUND This study aimed to investigate the association between blood trace elements and bone mineral density (BMD) and to determine the association between blood trace elements and the risk of low BMD/osteoporosis among US adults. METHODS We performed a cross-sectional study using data from National Health and Nutrition Examination Survey (NHANES, 2011-2016). Multivariable linear regression models were employed to assess the associations of BMD in lumbar spine (LS-BMD), pelvic (PV-BMD) and total femur (TF-BMD) with blood trace elements, including Fe, Zn, Cu, Se, Mn, Cd, Pb, Hg. Additionally, the associations of low BMD/osteoporosis with blood trace elements were also evaluated using multivariable logistic regression. RESULTS Higher blood Pb levels were found associated with decreased LS-BMD (p for trend < 0.001), PV-BMD (p for trend = 0.007), and TF-BMD (p for trend = 0.003) in female, while higher blood Se levels were associated with increased PV-BMD in female (p for trend = 0.042); no linear association between BMD and other blood trace element was observed. Also, significant associations were found between Pb levels and the prevalence of low BMD (p for trend = 0.030) and the prevalence of osteoporosis (p for trend = 0.036), while association between other blood trace elements and low BMD/osteoporosis was not observed. CONCLUSION This study provides comprehensive insight into the association between blood trace elements and BMD and supports a detrimental effect of blood Pb levels on bone mass in women. Considering our analysis from a representative US general population, further study is warranted for the extreme levels of blood trace elements on bone metabolism.
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Affiliation(s)
- Chunli Wu
- Xiangya School of Nursing, Central South University, Changsha, 410008, Hunan, China
- Department of Endocrinology, Endocrinology Research Center, Xiangya Hospital of Central South University, Changsha, 410008, Hunan, China
- Department of Endocrinology and Metabolism, Guiqian International General Hospital, Guiyang, 550004, China
| | - Yao Xiao
- Department of Endocrinology, Endocrinology Research Center, Xiangya Hospital of Central South University, Changsha, 410008, Hunan, China
| | - Yuexia Jiang
- Xiangya School of Nursing, Central South University, Changsha, 410008, Hunan, China.
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Wang L, Wang Z, Luo P, Bai S, Chen Y, Chen W. Dietary Zinc Glycine Supplementation Improves Tibia Quality of Meat Ducks by Modulating the Intestinal Barrier and Bone Resorption. Biol Trace Elem Res 2023; 201:888-903. [PMID: 35320516 DOI: 10.1007/s12011-022-03207-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Accepted: 03/15/2022] [Indexed: 01/21/2023]
Abstract
Leg problems characterized by gait abnormity and bone structure destruction are associated with a high risk of fractures and continuous pain in poultry. Zinc (Zn) acts a pivotal part in normal bone homeostasis and has proven to be highly effective in alleviating leg problems. Therefore, the effects of graded concentration of Zn on bone quality were evaluated in this study. A total of 512 1-d-old male ducks were fed 4 basal diets added 30 mg/kg Zn, 60 mg/kg Zn, 90 mg/kg Zn, and 120 mg/kg Zn as Zn glycine for 35 d. Tibia Zn content, ash percentage, and breaking strength linearly increased with dietary elevated Zn level (P < 0.05). Broken-line analysis revealed that the recommended level of Zn from Zn glycine was 55.13 mg/kg and 64.48 mg/kg based on tibia ash and strength, respectively. To further confirm the role of dietary Zn glycine addition on bone characteristics, data from birds fed either 60 mg/kg Zn as Zn sulfate (ZnSO4), 30 mg/kg Zn, or 60 mg/kg Zn in the form of Zn glycine indicated that birds given 60 mg/kg Zn from Zn glycine diet exhibited higher tibia ash, strength, and trabecular volume compared to those fed the 30 mg/kg Zn diet (P < 0.05). Dietary 60 mg/kg Zn as Zn glycine addition decreased intestinal permeability, upregulated the mRNA expression of tight junction protein, and increased the abundance of Lactobacillus and Bifidobacterium, which was companied by declined the level of inflammatory cytokines in both the ileum and bone marrow. Regarding bone turnover, the diet with 60 mg/kg Zn from Zn glycine induced osteoprotegerin expression and thus decreased osteoclast number and serum bone resorption biomarker levels including serum tartrate-resistant acid phosphatase activity and C-terminal cross-linked telopeptide of type I collagen level when compared to 30 mg/kg Zn diet (P < 0.05). Except for the upregulation in runt-related transcription factor 2 transcription, the experimental treatments did not apparently change the bone formation biomarker contents in serum. Additionally, Zn glycine displayed a more efficient absorption rate, evidenced by higher serum Zn level, and thus had potentially greater a protective role in the intestine barrier and tibia mass as compared to ZnSO4. Collectively, the dietary supplementation of 60 mg/kg in the form of Zn glycine could suppress bone resorption mediated by osteoclast and consequently improve tibial quality of meat ducks, in which enhanced intestinal integrity and optimized gut microbiota might be involved.
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Affiliation(s)
- Leilei Wang
- College of Animal Science and Technology, Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, 450046, China
| | - Ziyang Wang
- College of Animal Science and Technology, Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, 450046, China
| | - Pengna Luo
- College of Animal Science and Technology, Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, 450046, China
| | - Shiping Bai
- Institute of Animal Nutrition, Key Laboratory for Animal Disease-Resistance Nutrition of China, Ministry of Education, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China
| | - Yu Chen
- College of Animal Science and Technology, Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, 450046, China
| | - Wen Chen
- College of Animal Science and Technology, Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture, Henan Agricultural University, Zhengzhou, 450046, China.
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Lin S, Yang F, Ling M, Fan Y. Association between bone trace elements and osteoporosis in older adults: a cross-sectional study. Ther Adv Musculoskelet Dis 2022; 14:1759720X221125984. [PMID: 36185074 PMCID: PMC9523847 DOI: 10.1177/1759720x221125984] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 08/26/2022] [Indexed: 11/16/2022] Open
Abstract
Objectives: Metal micronutrients deficiency may be one of the risk factors for the development of osteoporosis. This study aimed to measure the trace element contents in human bone tissue to analyze the relationship between micronutrients and osteoporosis. Design: A cross-sectional survey was performed on data from 51 elderly patients with proximal femoral fracture. Methods: The concentrations of calcium, phosphorus, manganese, iron, copper, and zinc in bone tissue samples from 51 elderly patients with proximal femoral fracture were determined by energy-dispersive X-ray fluorescence (EDX). Subjects were divided into osteoporosis and non-osteoporosis groups according to their bone mineral density (BMD) T-score values. The difference in metal elements concentrations in bone tissue between the two groups was compared, and the role of metal elements in osteoporosis was discussed. Results: There was no statistical difference in age, sex, body mass index (BMI), serum albumin, biochemical blood indices, and bone turnover markers between the two groups. The Mann–Whitney U test was used to compare the difference in metal elements concentrations in bone tissue samples between the two groups. The results showed that manganese, copper, and zinc concentrations in the cancellous bone were significantly higher in the non-osteoporosis group than in the osteoporosis group. Multivariate logistic regression analysis indicated that high bone zinc concentration [odds ratio = 0.26, 95% confidence interval (CI) = 0.075–0.928, p = 0.038] was negatively correlated with osteoporosis. Conclusion: Manganese, copper, and zinc play an essential role in bone mineralization and metabolism. Among them, zinc may be most closely related to osteoporosis and play a key role in bone development and maintenance of bone mass. Therefore, we believe that the design of zinc-rich compounds or nutrients as a new complementary factor to increase the intake of zinc for the elderly could be able to prevent and intervene in the occurrence of osteoporosis in the early stage.
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Affiliation(s)
- Shangjin Lin
- Department of Orthopaedic, Huadong Hospital Affiliated to Fudan University, Shanghai, China
| | - Fengjian Yang
- Department of Orthopaedic, Huadong Hospital Affiliated to Fudan University, Shanghai, China
| | - Ming Ling
- Department of Orthopaedic, Huadong Hospital Affiliated to Fudan University, Shanghai, China
| | - Yongqian Fan
- Department of Orthopaedic, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, China
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Ceylan MN, Akdas S, Yazihan N. Is Zinc an Important Trace Element on Bone-Related Diseases and Complications? A Meta-analysis and Systematic Review from Serum Level, Dietary Intake, and Supplementation Aspects. Biol Trace Elem Res 2021; 199:535-549. [PMID: 32451694 DOI: 10.1007/s12011-020-02193-w] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 05/10/2020] [Indexed: 12/21/2022]
Abstract
Bone-related diseases are very common problems, especially in the elderly population. Zinc takes part in the growth and maintenance of healthy bones. This meta-analysis aims to evaluate the effects of zinc supplementation or dietary zinc intake on serum zinc levels and bone turnover markers. A systematical research was performed with 2899 articles in PubMed, WoS, and Scopus for relevant articles in English which have mean/standard deviation values of serum zinc levels, dietary zinc intake/zinc supplementation (mg/day), and bone turnover markers up to February 2020. In the overall analysis, serum zinc level was significantly lower in patients with osteoporosis compared with controls (p 0.0002). Dietary zinc intake decreased in the fracture group compared with controls according to subgroup analysis patients with fracture (p 0.02). Zinc supplementation was effective on the femoral neck (p < 0.0001) and lumbar spine (p 0.05) bone mineral density (BMD). In the correlation analysis of the data obtained from all of the included studies, serum osteocalcin (p 0.0106, r - 0.9148) correlated with serum zinc level. In conclusion, serum zinc level and dietary zinc intake could have an essential role in preventing osteoporosis. Zinc supplementation might improve bone turnover markers for bone formation such as serum osteocalcin and serum alkaline phosphatase and also, BMD at the site of the femoral neck.
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Affiliation(s)
- Merve Nur Ceylan
- Institute of Health Sciences, Interdisciplinary Food, Metabolism and Clinical Nutrition Department, Ankara University, Ankara, Turkey
| | - Sevginur Akdas
- Institute of Health Sciences, Interdisciplinary Food, Metabolism and Clinical Nutrition Department, Ankara University, Ankara, Turkey
| | - Nuray Yazihan
- Institute of Health Sciences, Interdisciplinary Food, Metabolism and Clinical Nutrition Department, Ankara University, Ankara, Turkey.
- Faculty of Medicine, Internal Medicine, Department of Pathophysiology, Ankara University, Morfoloji Building, Sihhiye, 06100, Ankara, Turkey.
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Wu Z, Yuan Y, Tian J, Long F, Luo W. The associations between serum trace elements and bone mineral density in children under 3 years of age. Sci Rep 2021; 11:1890. [PMID: 33479410 PMCID: PMC7820346 DOI: 10.1038/s41598-021-81501-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 01/05/2021] [Indexed: 12/31/2022] Open
Abstract
We examined the associations of age and serum magnesium, iron, lead, copper, and zinc levels with bone mineral density (BMD) in 2412 children under 3 years of age in order to find a tool to monitor BMD in children without the use of expensive imaging techniques. One-way ANOVA and chi-square tests were used to determine the associations of age and serum trace elements with BMD. Multivariable logistic regression analysis was used to test the correlation of five serum trace elements with BMD after adjustments for potential confounding factors in children under 3 years of age. Significant associations between age and four serum trace elements and BMD were found. Compared to the group with the lowest serum levels detected, the adjusted odds ratio (OR) for the incidence of normal bone mineral density in the third magnesium concentration tertile, the third iron concentration tertile, the fifth copper concentration quintile, the third zinc concentration quintile, and the fifth zinc concentration quintile were 1.30 (95% confidence interval (CI) 1.02–1.67), 1.43 (95% CI 1.11–1.84), 1.42 (95% CI 1.04–1.94), 1.46 (95% CI 1.05–2.04), and 1.48 (95% CI 1.06–2.06), respectively. However, there was no significant correlation between serum lead level and BMD in this study. Age and serum magnesium, iron, copper, and zinc levels are positively associated with BMD in children under 3 years old.
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Affiliation(s)
- Ziyi Wu
- Department of Orthopaedics, Xiangya Hospital, Central South University, Changsha, 410008, China
| | - Yuhao Yuan
- Department of Orthopaedics, Xiangya Hospital, Central South University, Changsha, 410008, China
| | - Jian Tian
- Department of Orthopaedics, Xiangya Hospital, Central South University, Changsha, 410008, China
| | - Feng Long
- Department of Orthopaedics, Xiangya Hospital, Central South University, Changsha, 410008, China
| | - Wei Luo
- Department of Orthopaedics, Xiangya Hospital, Central South University, Changsha, 410008, China.
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Impact of Dehydroepiandrosterone (DHEA) on Bone Mineral Density and Bone Mineral Content in a Rat Model of Male Hypogonadism. Vet Sci 2020; 7:vetsci7040185. [PMID: 33238425 PMCID: PMC7711937 DOI: 10.3390/vetsci7040185] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 11/03/2020] [Accepted: 11/16/2020] [Indexed: 11/16/2022] Open
Abstract
Objectives: The present study examined the effect DHEA (dehydroepiandrosterone) on bone mineral content (BMC) and bone mineral density (BMD) and biomarkers of bone remodeling in orchidectomized male rats. Material and Methods: A total of 32 male rats were divided equally into four groups (n = 8): (i) control group (C), (ii) control treated with DHEA (Control + DHEA), (iii) orchidectomized (ORCH) group that underwent bilateral orchidectomy and (iv) orchidectomized (ORCH) rats treated with DHEA (ORCH+DHEA). DHEA treatment started 4 weeks after orchidectomy and continued for 12 weeks. After 12 weeks the bone mineral density (BMD) and bone mineral content (BMC) were assayed in the tibia and femur of the right hind limb of each rat. We also measured the serum levels of the bone turnover markers deoxypyridinoline (Dpd), N-telopeptide of type I collagen (NTx), alkaline phosphatase (ALP), tartrate-resistant acid phosphatase 5b (TRAP-5b) and osteocalcin (OC) as well as receptor activator of nuclear factor kappa B (RANK) and osteoprotegerin (OPG). Results: Orchidectomy in rats caused significant reduction in BMD, BMC, serum levels of testosterone, PTH (parathyroid hormone), OPG, OC and ALP with significant rise in serum levels of TRAP-5B, RANK, Dpd and NTx1 (p < 0.05). On the other hand, DHEA therapy for 12 weeks caused significant improvement in all studied parameters except NTx1 (p < 0.05). Conclusions: DHEA corrected hypogonadism-induced osteoporosis in male rats probably via inhibiting osteoclastogenesis, stimulating the activity of osteoblasts and stimulating the secretion of PTH and testosterone.
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Ren W, Gan D, Tan G, Xue H, Li N, Xu Z. CHANGES OF WNT/B-CATENIN SIGNALING AND DIFFERENTIATION POTENTIAL OF BONE MARROW MESENCHYMAL STEM CELLS IN PROCESS OF BONE LOSS IN OVARIECTOMIZED RATS. ACTA ENDOCRINOLOGICA-BUCHAREST 2020; 16:156-164. [PMID: 33029231 DOI: 10.4183/aeb.2020.156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Background In vitro studies of the changes about osteoblastogenesis and adipogenesis potential of BMSCs were not clear. As it is the critical pathway for osteogenic differentiation and bone formation, whether or not Wnt/β-catenin signalling is involved in the changes of osteogenic and adipogenic potential of BMSCs and participates in bone content decrease of ovariectomized (OVX)osteoporosis rats has been rarely reported. Material/Methods BMSCs from femurs of ovariectomzed rats were isolated and cultured in vitro. The proliferation potential of BMSCs was analysed by CCK-8 assays . Osteoblastic and adipogenic differentiation potential of the BMSCs was assessed by ALP activity assay, Alizarin red S staining, Oil red O staining and RT-PCR analysis. Results The results demonstrated that BMSCs from bilateral ovariectomization rats were endowed with lower proliferation and osteoblastic differentiation potential but higher adipogenic potential than the control group in vitro. In addition, β-catenin was found to have been decreased in OVX BMSCs, indicating that Wnt/β-catenin signalling pathways were suppressed in OVX BMSCs . Conclusions Results suggested that changes in the Wnt canonical signalling pathway may be related to imbalances of osteogenic and adipogenic potential of BMSCs, and this may be an important factor related to bone content decrease in ovariectomized osteoporosis rats.
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Bhardwaj P, Dhawan DK. Zinc treatment modulates hematological and morphological changes in rat erythrocytes following arsenic exposure. Toxicol Ind Health 2020; 35:593-603. [PMID: 31663452 DOI: 10.1177/0748233719878563] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The aim of this study was to understand the effects of zinc supplementation on antioxidant defense systems, hematological indices, and erythrocyte morphology in conditions of chronic arsenic toxicity. Male Wistar rats were segregated into four groups: control, arsenic treated, zinc supplemented, and arsenic + zinc treated. The animals in the arsenic-treated group were given arsenic orally in drinking water in the form of sodium arsenite at a dose level of 100 mg L-1, and zinc was administered to zinc-treated animals in the form of zinc sulfate orally in drinking water at a dose level of 227 mg L-1. The animals were subjected to different treatments for a period of 12 weeks, and various investigations were undertaken that included serum zinc content, activity of antioxidant enzymes, and hematological indices. Further, scanning electron microscopic (SEM) studies were performed to assess morphological changes in erythrocytes. Arsenic treatment significantly reduced serum zinc concentrations, which, however, were restored to near-normal levels upon zinc supplementation. The activities of enzymes involved in antioxidant defense systems were altered in the erythrocyte lysates of arsenic-treated rats, which interestingly revealed a significant improvement upon simultaneous zinc supplementation. A significant reduction in the counts of total leukocytes, neutrophils, and lymphocytes was observed following arsenic intoxication, which came back to near control levels following zinc supplementation. Also, protective effects of zinc were evident from SEM that revealed maintenance of topographical appearances of erythrocytes in conditions of arsenic toxicity. Thus, this study clearly shows the protection afforded by zinc on erythrocytes during arsenic-induced toxicity.
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Affiliation(s)
- Payal Bhardwaj
- Department of Biophysics, Panjab University, Chandigarh, India
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O’Connor JP, Kanjilal D, Teitelbaum M, Lin SS, Cottrell JA. Zinc as a Therapeutic Agent in Bone Regeneration. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E2211. [PMID: 32408474 PMCID: PMC7287917 DOI: 10.3390/ma13102211] [Citation(s) in RCA: 93] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 05/03/2020] [Accepted: 05/08/2020] [Indexed: 11/28/2022]
Abstract
Zinc is an essential mineral that is required for normal skeletal growth and bone homeostasis. Furthermore, zinc appears to be able to promote bone regeneration. However, the cellular and molecular pathways through which zinc promotes bone growth, homeostasis, and regeneration are poorly understood. Zinc can positively affect chondrocyte and osteoblast functions, while inhibiting osteoclast activity, consistent with a beneficial role for zinc in bone homeostasis and regeneration. Based on the effects of zinc on skeletal cell populations and the role of zinc in skeletal growth, therapeutic approaches using zinc to improve bone regeneration are being developed. This review focuses on the role of zinc in bone growth, homeostasis, and regeneration while providing an overview of the existing studies that use zinc as a bone regeneration therapeutic.
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Affiliation(s)
- J. Patrick O’Connor
- Department of Orthopaedics, Rutgers-New Jersey Medical School, Newark, NJ 07103, USA;
- School of Graduate Studies, Rutgers, the State University of New Jersey, 185 South Orange Avenue, Newark, NJ 07103, USA; (D.K.); (M.T.)
| | - Deboleena Kanjilal
- School of Graduate Studies, Rutgers, the State University of New Jersey, 185 South Orange Avenue, Newark, NJ 07103, USA; (D.K.); (M.T.)
| | - Marc Teitelbaum
- School of Graduate Studies, Rutgers, the State University of New Jersey, 185 South Orange Avenue, Newark, NJ 07103, USA; (D.K.); (M.T.)
| | - Sheldon S. Lin
- Department of Orthopaedics, Rutgers-New Jersey Medical School, Newark, NJ 07103, USA;
- School of Graduate Studies, Rutgers, the State University of New Jersey, 185 South Orange Avenue, Newark, NJ 07103, USA; (D.K.); (M.T.)
| | - Jessica A. Cottrell
- Department of Biological Sciences, Seton Hall University, 400 South Orange Avenue, South Orange, NJ 07079, USA;
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Qi S, He J, Zheng H, Chen C, Jiang H, Lan S. Zinc Supplementation Increased Bone Mineral Density, Improves Bone Histomorphology, and Prevents Bone Loss in Diabetic Rat. Biol Trace Elem Res 2020; 194:493-501. [PMID: 31363990 DOI: 10.1007/s12011-019-01810-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Accepted: 07/01/2019] [Indexed: 12/24/2022]
Abstract
Diabetic osteoporosis (DOP) is a complication of diabetes, with the characteristics of bone mineral density (BMD) reduction and bone structure destruction. Zinc was reported has a benefit effect on postmenopausal osteoporosise, it was also has hypoglycemic effect, whether zinc was beneficial on diabetes-induced osteoporosis has not been reported. So in the present study, we established a diabetic rat model by streptozotocin injection (60 mg/kg), and administered zinc sulfate by oral gavage to investigate the protective effects of zinc on DOP and the underline possible mechanism. Thirty six Sprague Dawley rats were divided into T1DM group (diabetic rats), control group (vehicle treatment), and T1DM-Zinc group (diabetic rats administered zinc sulfate 0.25 mg/kg by oral gavage). The bone histomorphological parameters, serum bone metabolism markers (including ALP, OPG, RUNX 2, and RANKL), BMD, and bone marrow adipocyte numbers were detected after eight weeks of zinc sulfate treatment. The results showed zinc sulfate administration (0.25 mg/kg/d) decreased blood glucose, increased the BMD, decreased serum ALP, and RANKL, increased serum OPG and RUNX 2 levels, as well as OPG/RANKL ratio of T1DM rats. Meanwhile, the bone histomorphological parameters, bone marrow adipocytes numbers were returned to be normal. The RUNX 2, and OPG mRNA expression levels in bone tissues of T1DM-Zinc group rats were increased after zinc sulfate treatment compared with the diabetic rats (P < 0.05). Those indicating that zinc sulfate can prevent DOP, the protective mechanism were mainly related to its hypoglycemic effect, bone marrow lipogenesis inhibition effect, OPG/RANKL ratio and RUNX 2 up-regulation effect.
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Affiliation(s)
- Shanshan Qi
- Vitamin D Research Institute, College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723000, Shaanxi, China
| | - Jia He
- Vitamin D Research Institute, College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723000, Shaanxi, China
| | - Hongxing Zheng
- Chinese-German Joint Laboratory for Natural Product Research, College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723000, China.
| | - Chen Chen
- Chinese-German Joint Laboratory for Natural Product Research, College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723000, China
| | - Hai Jiang
- Chinese-German Joint Laboratory for Natural Product Research, College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723000, China
| | - Shiqiang Lan
- Vitamin D Research Institute, College of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723000, Shaanxi, China
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Taniyama T, Saruta J, Mohammadzadeh Rezaei N, Nakhaei K, Ghassemi A, Hirota M, Okubo T, Ikeda T, Sugita Y, Hasegawa M, Ogawa T. UV-Photofunctionalization of Titanium Promotes Mechanical Anchorage in A Rat Osteoporosis Model. Int J Mol Sci 2020; 21:ijms21041235. [PMID: 32059603 PMCID: PMC7072956 DOI: 10.3390/ijms21041235] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 02/06/2020] [Accepted: 02/11/2020] [Indexed: 12/14/2022] Open
Abstract
Effects of UV-photofunctionalization on bone-to-titanium integration under challenging systemic conditions remain unclear. We examined the behavior and response of osteoblasts from sham-operated and ovariectomized (OVX) rats on titanium surfaces with or without UV light pre-treatment and the strength of bone-implant integration. Osteoblasts from OVX rats showed significantly lower alkaline phosphatase, osteogenic gene expression, and mineralization activities than those from sham rats. Bone density variables in the spine were consistently lower in OVX rats. UV-treated titanium was superhydrophilic and the contact angle of ddH2O was ≤5°. Titanium without UV treatment was hydrophobic with a contact angle of ≥80°. Initial attachment to titanium, proliferation, alkaline phosphatase activity, and gene expression were significantly increased on UV-treated titanium compared to that on control titanium in osteoblasts from sham and OVX rats. Osteoblastic functions compromised by OVX were elevated to levels equivalent to or higher than those of sham-operated osteoblasts following culture on UV-treated titanium. The strength of in vivo bone-implant integration for UV-treated titanium was 80% higher than that of control titanium in OVX rats and even higher than that of control implants in sham-operated rats. Thus, UV-photofunctionalization effectively enhanced bone-implant integration in OVX rats to overcome post-menopausal osteoporosis-like conditions.
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Affiliation(s)
- Takashi Taniyama
- Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA; (T.T.); (N.M.R.); (K.N.); (A.G.); (M.H.); (T.O.); (T.I.); (Y.S.); (M.H.); (T.O.)
- Department of Orthopedic Surgery, Yokohama City Minato Red Cross Hospital, 3-12-1 Shinyamashita, Yokohama 231-8682, Kanagawa, Japan
| | - Juri Saruta
- Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA; (T.T.); (N.M.R.); (K.N.); (A.G.); (M.H.); (T.O.); (T.I.); (Y.S.); (M.H.); (T.O.)
- Department of Oral Science, Graduate School of Dentistry, Kanagawa Dental University, 82 Inaoka, Yokosuka 238-8580, Kanagawa, Japan
- Correspondence: ; Tel./Fax: +81-46-822-9537
| | - Naser Mohammadzadeh Rezaei
- Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA; (T.T.); (N.M.R.); (K.N.); (A.G.); (M.H.); (T.O.); (T.I.); (Y.S.); (M.H.); (T.O.)
| | - Kourosh Nakhaei
- Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA; (T.T.); (N.M.R.); (K.N.); (A.G.); (M.H.); (T.O.); (T.I.); (Y.S.); (M.H.); (T.O.)
| | - Amirreza Ghassemi
- Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA; (T.T.); (N.M.R.); (K.N.); (A.G.); (M.H.); (T.O.); (T.I.); (Y.S.); (M.H.); (T.O.)
| | - Makoto Hirota
- Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA; (T.T.); (N.M.R.); (K.N.); (A.G.); (M.H.); (T.O.); (T.I.); (Y.S.); (M.H.); (T.O.)
- Department of Oral and Maxillofacial Surgery/Orthodontics, Yokohama City University Medical Center, 4-57 Urafune-cho, Yokohama 232-0024, Kanagawa, Japan
| | - Takahisa Okubo
- Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA; (T.T.); (N.M.R.); (K.N.); (A.G.); (M.H.); (T.O.); (T.I.); (Y.S.); (M.H.); (T.O.)
| | - Takayuki Ikeda
- Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA; (T.T.); (N.M.R.); (K.N.); (A.G.); (M.H.); (T.O.); (T.I.); (Y.S.); (M.H.); (T.O.)
| | - Yoshihiko Sugita
- Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA; (T.T.); (N.M.R.); (K.N.); (A.G.); (M.H.); (T.O.); (T.I.); (Y.S.); (M.H.); (T.O.)
| | - Masakazu Hasegawa
- Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA; (T.T.); (N.M.R.); (K.N.); (A.G.); (M.H.); (T.O.); (T.I.); (Y.S.); (M.H.); (T.O.)
| | - Takahiro Ogawa
- Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA; (T.T.); (N.M.R.); (K.N.); (A.G.); (M.H.); (T.O.); (T.I.); (Y.S.); (M.H.); (T.O.)
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Amin N, Clark CCT, Taghizadeh M, Djafarnejad S. Zinc supplements and bone health: The role of the RANKL-RANK axis as a therapeutic target. J Trace Elem Med Biol 2020; 57:126417. [PMID: 31653549 DOI: 10.1016/j.jtemb.2019.126417] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 09/20/2019] [Accepted: 10/05/2019] [Indexed: 01/19/2023]
Abstract
BACKGROUND To this day, empirical data suggests that zinc has important roles in matrix synthesis, bone turnover, and mineralization and its beneficial effects on bone could be mediated through different mechanisms. The influence of zinc on bone turnover could be facilitated via regulating RANKL/RANK/OPG pathway in bone tissue. Therefore, the aim of the study was to conduct a review to investigate the possible effect of the zinc mediated bone remodeling via RANKL/RANK/OPG pathway. METHODS A comprehensive systematic search was performed in MEDLINE/PubMed, Cochrane Library, SCOPUS, and Google Scholar to explore the studies investigating the effect of zinc as a bone remodeling factor via RANKL/RANK/OPG pathway regulation. Subsequently, the details of the pathway and the impact of zinc supplements on RANKL/RANK/OPG pathway regulation were discussed. RESULTS The pathway could play an important role in bone remodeling and any imbalance between RANKL/RANK/OPG components could lead to extreme bone resorption. Although the outcomes of some studies are equivocal, it is evident that zinc possesses protective properties against bone loss by regulating the RANKL/RANK/OPG pathway. There are several experiments where zinc supplementation resulted in upregulation of OPG expression or decreases RANKL level. However, the results of some studies oppose this. CONCLUSION It is likely that sufficient zinc intake will elicit positive effects on bone health by RANKL/RANK/OPG regulation. Although the outcomes of a few studies are equivocal, it seems that zinc can exert the protective properties against bone loss by suppressing osteoclastogenesis via downregulation of RANKL/RANK. Additionally, there are several experiments where zinc supplementation resulted in upregulation of OPG expression. However, the results of limited studies oppose this. Therefore, aside from the positive role zinc possesses in preserving bone mass, further effects of zinc in RANKL/RANK/OPG system requires further animal/human studies.
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Affiliation(s)
- Negin Amin
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Iran
| | - Cain C T Clark
- Centre for Sport, Exercise, and Life Sciences, Coventry University, Coventry, United Kingdom
| | - Mohsen Taghizadeh
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Iran
| | - Sadegh Djafarnejad
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Iran.
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Parveen B, Parveen A, Vohora D. Biomarkers of Osteoporosis: An Update. Endocr Metab Immune Disord Drug Targets 2019; 19:895-912. [DOI: 10.2174/1871530319666190204165207] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 11/16/2018] [Accepted: 01/19/2019] [Indexed: 02/06/2023]
Abstract
Background:
Osteoporosis, characterized by compromised bone quality and strength is
associated with bone fragility and fracture risk. Biomarkers are crucial for the diagnosis or prognosis
of a disease as well as elucidating the mechanism of drug action and improve decision making.
Objective:
An exhaustive description of traditional markers including bone mineral density, vitamin D,
alkaline phosphatase, along with potential markers such as microarchitectural determination, trabecular
bone score, osteocalcin, etc. is provided in the current piece of work. This review provides insight into
novel pathways such as the Wnt signaling pathway, neuro-osseous control, adipogenic hormonal imbalance,
gut-bone axis, genetic markers and the role of inflammation that has been recently implicated
in osteoporosis.
Methods:
We extensively reviewed articles from the following databases: PubMed, Medline and Science
direct. The primary search was conducted using a combination of the following keywords: osteoporosis,
bone, biomarkers, bone turnover markers, diagnosis, density, architecture, genetics, inflammation.
Conclusion:
Early diagnosis and intervention delay the development of disease and improve treatment
outcome. Therefore, probing for novel biomarkers that are able to recognize people at high risk for
developing osteoporosis is an effective way to improve the quality of life of patients and to understand
the pathomechanism of the disease in a better way.
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Affiliation(s)
- Bushra Parveen
- Department of Pharmacology, Pharmaceutical Medicine, School of Pharmaceutical Education and Research, Jamia Hamdard, New-Delhi-10062, India
| | - Abida Parveen
- Department of Clinical Research, School of Interdisciplinary Sciences, Jamia Hamdard, New-Delhi-10062, India
| | - Divya Vohora
- Department of Pharmacology, Pharmaceutical Medicine, School of Pharmaceutical Education and Research, Jamia Hamdard, New-Delhi-10062, India
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Sadeghzade S, Emadi R, Tavangarian F, Doostmohammadi A. The influence of polycaporolacton fumarate coating on mechanical properties and in vitro behavior of porous diopside-hardystonite nano-composite scaffold. J Mech Behav Biomed Mater 2019; 101:103445. [PMID: 31569038 DOI: 10.1016/j.jmbbm.2019.103445] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 06/05/2019] [Accepted: 09/22/2019] [Indexed: 12/19/2022]
Abstract
One of the significant challenges in bone tissue engineering is the fabrication of highly porous scaffolds with interconnected pores and appropriate mechanical properties. Artificial scaffolds which used in the field of medicine are usually made of single phase of polymer or ceramic. However, composition of these materials can produce the scaffolds with improve mechanical and biological properties.The aim of this study is to synthesize three-dimensional hardystonite-diopside (HT-Dio) porous scaffolds modified by polycaporolacton fumarate coating for low-load-bearing bone tissue engineering applications. The results showed that hardystonite scaffolds with 15 wt. % diopside and 6 w/v % polymer polycaporolacton fumarate (PCLF) had a significant bioactivity. The cell culture and cell attachment assay results revealed the well spreading of BMS cells on the surface of modified scaffolds which indicates the high biocompatibility of this scaffold. The modified scaffolds had a mean pore size, porosity, compressive strength, modules and toughness of 293.47 ± 5.51 μm, 74% ± 1.01, 3.37 ± 0.6 MPa, 151 ± 1.1 MPa and 31.3 ± 0.32 kJ/m3, respectively, which are in the appropriate range for spongy bone and hence can be a good candidate for bone tissue engineering applications.
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Affiliation(s)
- Sorour Sadeghzade
- Materials Research Group, Department of Materials Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran; Mechanical Engineering Program, School of Science, Engineering and Technology, Pennsylvania State University, Harrisburg, Middletown, PA, 17057, USA
| | - Rahmatollah Emadi
- Materials Research Group, Department of Materials Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Fariborz Tavangarian
- Mechanical Engineering Program, School of Science, Engineering and Technology, Pennsylvania State University, Harrisburg, Middletown, PA, 17057, USA.
| | - Ali Doostmohammadi
- Department of Mechanical Engineering, Lassonde School of Engineering, York University, Toronto, M3J1P3, Canada
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Potential of electrical impedance spectroscopy to differentiate between healthy and osteopenic bone. Clin Biomech (Bristol, Avon) 2018; 57:81-88. [PMID: 29960118 DOI: 10.1016/j.clinbiomech.2018.05.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 05/25/2018] [Accepted: 05/25/2018] [Indexed: 02/06/2023]
Abstract
UNLABELLED Osteoporosis involves loss of structural stability of bone due to an increase in bone porosity. Dual energy X-ray absorptometry is used to evaluate bone in terms of quantity. However, it does not give an evaluation of the patient's bone quality. For this, present study has been carried out to assess the structural deterioration of bone using electrical impedance spectroscopy. METHODS Electrical Impedance Spectroscopy has been applied to evaluate the structural and compositional changes of cortical bone in the frequency range of 50 Hz to 5 MHz for the ovariectomized rat model. Initially, bone resorption in the ovariectomized group has been confirmed by estimating tartaric resistant acid phosphatase levels; morphometric parameters; bone matrix components, hydroxyapatite crystallite size and bone micro architecture. The mid diaphyseal regions from the femora and tibiae of sixty days post ovariectomy and control rats were used for the measurement of dielectric parameters. A dispersion model based analysis has been developed by a complex least square fitting of the dielectric data. FINDINGS Increased tartaric resistant acid phosphatase levels, altered bone matrix components, hydroxyapatite crystallite size and disturbed microarchitecture in the ovariectomized group give us the confirmation of increased bone resorption following estrogen deficiency. These changes were shown to be reflected by single dispersion model based fitted parameters which shows the considerable change in all the parameters of ovariectomized group compared to the control. INTERPRETATION It has been demonstrated that the parameters of the dispersion model can reflect the bone structural and compositional changes.
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18
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Qi S. Synergistic Effects of Genistein and Zinc on Bone Metabolism and the Femoral Metaphyseal Histomorphology in the Ovariectomized Rats. Biol Trace Elem Res 2018; 183:288-295. [PMID: 28842860 DOI: 10.1007/s12011-017-1134-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Accepted: 08/14/2017] [Indexed: 10/19/2022]
Abstract
In this study, we evaluated the synergistic effects of genistein and zinc on bone metabolism, bone mineral density, and the femoral metaphyseal histomorphology in the ovariectomized rats. Sixty female Sprague-Dawley rats, aged 13 weeks, were divided into sham-operated group (SHAM), ovariectomized group (OVX), genistein-treated group (OVX-Gen), zinc-treated group (OVX-Zn), genistein combined zinc-treated group (OVX-Gen-Zn), and 17β-estradiol-treated group (OVX-E) (n = 10). Genistein, zinc, and 17β-estradiol injections were started immediately after OVX and continued for 10 weeks. The OVX-Gen group was subcutaneous injections of genistein (5 mg/kg once every day). The OVX-Zn group was given intragastric ZnSO4 (0.25 mg/kg once every day) after bilateral ovariectomy. The OVX-Gen-Zn group was subcutaneous injections of genistein (5 mg/kg), at the same time intragastric ZnSO4 (0.25 mg/kg once every day). OVX-E group were intraperitoneally injected with 17β-estradiol (10 μg/kg) once every other day. The results showed that genistein and zinc did not alter body weight in OVX rats. The soluble ZnSO4 had no effect to uterus weight loss. Genistein and zinc supplementation significantly increased the BMD of the femur and lumbar spine in OVX rats (P < 0.05, vs. OVX control group). The BMD of the lumbar spine and femur in the OVX-Gen-Zn group is higher than that in the OVX-Gen and OVX-Zn groups (P < 0.05), and there were no differences of BMD among the OVX-Gen-Zn, OVX-E, and SHAM groups (P > 0.05). The femoral metaphyseal morphology and bone histomorphometric parameters revealed that the trabecular volume and thickness in the OVX-Gen-Zn and OVX-E groups were similar to that of SHAM group, and the OVX-Gen-Zn group had more trabecular volume than the OVX-Gen and OVX-Zn groups. Serum zinc was found to be significantly reduced in the OVX group when compared with SHAM. Serum zinc levels were enhanced in the OVX-Zn, OVX-Gen-Zn, and OVX-E groups and restored to normal levels. Serum calcium and serum phosphorus in the OVX-Gen-Zn group was greater than that in the OVX-Gen and OVX-Zn groups (P < 0.05); the serum calcium, phosphorus, and ALP in the OVX-Gen-Zn group were similar to that of SHAM and OVX-E groups (P > 0.05). The OVX group had higher osteocalcin, CTX, and RANKL than the SHAM group (P < 0.01). They were lower in the OVX-Gen and OVX-Zn groups (P < 0.05), and they were significantly lower in the OVX-Gen-Zn and OVX-E groups, than in the OVX group. There were no significant differences of osteocalcin, CTX, and RANKL among the OVX-Gen-Zn, OVX-E, and SHAM groups (P > 0.05). OPG and OPG/RANKL ratios were significantly higher in the OVX-Gen and OVX-Zn groups than that in the OVX group (P < 0.05). The OPG and OPG/RANKL ratio in the OVX-Gen-Zn group is higher than that in the OVX-Gen and OVX-Zn groups (P < 0.05, vs. OVX-Gen group; P < 0.01, vs. OVX-Zn group). The differences of the OPG and OPG/RANKL ratios between the OVX-Gen-Zn, OVX-E, and the SHAM groups were not significant (P > 0.05). The results above indicate that the genistein and zinc have synergistic effects on both stimulation of bone formation and suppression of bone resorption in ovariectomized rats, thereby increasing bone mass.
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Affiliation(s)
- Shanshan Qi
- Vitamin D Research Institute, Shaanxi University of Technology, Chaoyang Road, Hantai District, Hanzhong City, Shaanxi Province, 723000, China.
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Beneficial role of biochanin A on cutaneous and renal tissues of ovariectomized rats treated with anastrozole. Life Sci 2018; 201:9-16. [DOI: 10.1016/j.lfs.2018.03.037] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Revised: 03/07/2018] [Accepted: 03/18/2018] [Indexed: 11/18/2022]
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20
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Xiong K, Wu T, Fan Q, Chen L, Yan M. Novel Reduced Graphene Oxide/Zinc Silicate/Calcium Silicate Electroconductive Biocomposite for Stimulating Osteoporotic Bone Regeneration. ACS APPLIED MATERIALS & INTERFACES 2017; 9:44356-44368. [PMID: 29211449 DOI: 10.1021/acsami.7b16206] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In the absence of external assistance, autogenous healing of bone fracture is difficult due to impaired regeneration ability under osteoporosis pathological conditions. In this study, a reduced graphene oxide/zinc silicate/calcium silicate (RGO/ZS/CS) conductive biocomposite with an optimal surface electroconductivity of 5625 S/m was prepared by a two-step spin-coating method. The presence of lamellar apatite nanocrystals on the surfaces of the biocomposite suggests that it has good in vitro biomineralization ability. The silicon and zinc released from the biocomposite induced a significant increase in the osteogenesis of mouse bone mesenchymal stem cells (mBMSCs). Furthermore, alkaline phosphatase activities were further promoted when 3 μA direct current was applied to stimulate the mBMSCs that were cultured on the RGO/ZS/CS surface. However, electrical stimulation failed to further upregulate the osteogenesis-related gene expression. Moreover, RGO/ZS/CS extracts were found to suppress the receptor activator of nuclear factor-κB ligand-induced osteoclastic differentiation of mouse leukemic monocyte macrophages (RAW264.7 cells). Although the zinc ions in the RGO/ZS/CS extracts showed an inhibitory role in human umbilical vein endothelial cell (HUVEC) proliferation, dilutions of the RGO/ZS/CS extracts (1/16, 1/32, and 1/64) promoted HUVEC proliferation, and their angiogenesis-related gene expression was also upregulated. On the basis of the results of the in vitro angiogenesis model, more interconnected tubes formed when the above dilutions of RGO/ZS/CS extracts were added to ECMatrix. The new RGO/ZS/CS electroconductive biocomposite has potential to be used for stimulating osteoporotic bone regeneration.
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Affiliation(s)
- Kun Xiong
- State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology , Mianyang 621010, China
| | - Tingting Wu
- Department of Bone and Joint Surgery, Institute of Orthopedic Diseases, The First Affiliated Hospital, Jinan University , Guangzhou 510630, China
| | - Qingbo Fan
- State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology , Mianyang 621010, China
| | - Lin Chen
- State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology , Mianyang 621010, China
| | - Minhao Yan
- State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology , Mianyang 621010, China
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Lim J, Hwang S. Identification of Osteoporosis-Associated Protein Biomarkers from Ovariectomized Rat Urine. CURR PROTEOMICS 2017; 14:130-137. [PMID: 28579927 PMCID: PMC5427775 DOI: 10.2174/1570164614666161228124801] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 12/16/2016] [Accepted: 12/21/2016] [Indexed: 12/11/2022]
Abstract
Objective: Osteoporotic fracture is one of the most common health risks and aggravates the quality of life among postmenopausal women worldwide. In this study, osteoporosis-associated protein biomarkers were identified from urine of osteoporotic female Sprague-Dawley rats developed by ovariectomy. Method: Four months after the operation, the bone mineral density of the femur of ovariectomized rats was significantly lowered in comparison with that of the sham operated rats. The protein profiles of the urine samples collected from the sham, ovariectomized (OVX) and 2 month-old non-operated (Young) rats were compared by 2-D gel and MS spectrometry. Results: Proteins consistently expressed between Young and sham but differentially expressed in OVX rats were selected and identified. One down-regulated 21 kDa protein, superoxide dismutase (SOD), and 1 up-regulated 53-54 kDa protein, alph-1-antitrypsin (A1AT), were selected from urine of the ovariectomized rats by 2-D gel analysis. Further, a total of 30 with 19 up-regulated and 11-down-regulated proteins were selected by LC-MS analysis with more than 2-fold differences in spectral counts. The fact that SOD and A1AT are also listed in the 30 differential proteins suggests that our biomarker isolation procedure suitably represents osteoporosis-associated proteins in urine. Conclusion: Supporting the facts, the differential expressions of SOD and A1AT in urine could be validated by Western blotting. These urinary osteoporosis-associated proteins have high potentials to become candidates for non-invasive diagnosis of osteoporosis from urine.
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Affiliation(s)
- Jinkyu Lim
- Major in Food Biomaterials, Institute of Agricultural Science and Technology, Kyungpook National University, Daegu, South Korea
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22
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Ferreira ECS, Bortolin RH, Freire-Neto FP, Souza KSC, Bezerra JF, Ururahy MAG, Ramos AMO, Himelfarb ST, Abreu BJ, Didone TVN, Pedrosa LFC, Medeiros AC, Doi SQ, Brandão-Neto J, Hirata RDC, Rezende LA, Almeida MG, Hirata MH, Rezende AA. Zinc supplementation reduces RANKL/OPG ratio and prevents bone architecture alterations in ovariectomized and type 1 diabetic rats. Nutr Res 2017; 40:48-56. [PMID: 28473060 DOI: 10.1016/j.nutres.2017.03.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 02/16/2017] [Accepted: 03/09/2017] [Indexed: 02/05/2023]
Abstract
Type 1 diabetes mellitus (T1DM) and estrogen deficiency are associated with several alterations in bone turnover. Zinc (Zn) is required for growth, development, and overall health. Zinc has been used in complementary therapy against bone loss in several diseases. We hypothesized that Zn supplementation represents a potential therapy against severe bone loss induced by the combined effect of estrogen deficiency and T1DM. We evaluated the protective effect of Zn against bone alterations in a chronic model of these disorders. Female Wistar rats were ramdomized into 3 groups (5 rats each): control, OVX/T1DM (ovariectomized rats with streptozotocin-induced T1DM), and OVX/T1DM+Zn (OVX/T1DM plus daily Zn supplementation). Serum biochemical, bone histomorphometric, and molecular analyses were performed. Histomorphometric parameters were similar between the control and OVX/T1DM+Zn groups, suggesting that Zn prevents bone architecture alterations. In contrast, the OVX/T1DM group showed significantly lower trabecular width and bone area as well as greater trabecular separation than the control. The OVX/T1DM and OVX/T1DM+Zn groups had significantly higher serum alkaline phosphatase activity than the control. The supplemented group had higher levels of serum-ionized calcium and phosphorus than the nonsupplemented group. The RANKL/OPG ratio was similar between the control and OVX/T1DM+Zn groups, whereas it was higher in the OVX/T1DM group. In conclusion, Zn supplementation prevents bone alteration in chronic OVX/T1DM rats, as demonstrated by the reduced RANKL/OPG ratio and preservation of bone architecture. The findings may represent a novel therapeutic approach to preventing OVX/T1DM-induced bone alterations.
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Affiliation(s)
- Elaine C S Ferreira
- Department of Clinical and Toxicological Analyses, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Raul H Bortolin
- Department of Clinical and Toxicological Analyses, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Francisco P Freire-Neto
- Department of Biochemistry, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Karla S C Souza
- Department of Clinical and Toxicological Analyses, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - João F Bezerra
- Department of Clinical and Toxicological Analyses, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Marcela A G Ururahy
- Department of Clinical and Toxicological Analyses, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Ana M O Ramos
- Department of Clinical Pathology, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Silvia T Himelfarb
- School of Pharmaceutical Science, University of São Paulo, São Paulo, Brazil
| | - Bento J Abreu
- Department of Morphology, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Thiago V N Didone
- School of Pharmaceutical Science, University of São Paulo, São Paulo, Brazil
| | - Lucia F C Pedrosa
- Department of Nutrition, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Aldo C Medeiros
- Department of Clinical Medicine, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Sonia Q Doi
- Department of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - José Brandão-Neto
- Department of Clinical Medicine, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Rosário D C Hirata
- School of Pharmaceutical Science, University of São Paulo, São Paulo, Brazil
| | - Luciana A Rezende
- Department of Chemistry, University of Ribeirão Preto, Ribeirão Preto, São Paulo, Brazil
| | - Maria G Almeida
- Department of Clinical and Toxicological Analyses, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil
| | - Mario H Hirata
- School of Pharmaceutical Science, University of São Paulo, São Paulo, Brazil
| | - Adriana A Rezende
- Department of Clinical and Toxicological Analyses, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte, Brazil.
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23
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Liu H, Li W, Ge X, Jia S, Li B. Coadministration of puerarin (low dose) and zinc attenuates bone loss and suppresses bone marrow adiposity in ovariectomized rats. Life Sci 2016; 166:20-26. [DOI: 10.1016/j.lfs.2016.09.024] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 09/17/2016] [Accepted: 09/28/2016] [Indexed: 01/09/2023]
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24
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Zinc inhibits ovariectomy induced microarchitectural changes in the bone tissue. JOURNAL OF NUTRITION & INTERMEDIARY METABOLISM 2016. [DOI: 10.1016/j.jnim.2015.12.333] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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25
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Li B, Liu H, Jia S. Zinc enhances bone metabolism in ovariectomized rats and exerts anabolic osteoblastic/adipocytic marrow effects ex vivo. Biol Trace Elem Res 2015; 163:202-7. [PMID: 25431298 DOI: 10.1007/s12011-014-0185-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Accepted: 11/17/2014] [Indexed: 01/09/2023]
Abstract
Investigations of bone mass and marrow adiposity are critical for defining the role of zinc (Zn) in bone metabolism. Rats used for study were grouped as follows: control (sham), ovariectomy (OVX), ovariectomy + estradiol (OVX-E), ovariectomy + Zn treatment (OVX-Zn). Bone mineral density (BMD) was quantified (microCT); serum osteocalcin, adiponectin, RANKL, and TRAP levels were assayed (ELISA); and biochemical determinations of serum alkaline phosphatase (ALP), calcium (Ca), and phosphorus (P) were done. Cells derived from bone mesenchymal stem cell (BMSC) isolates of respective test groups were compared, identifying primary osteoblasts by MTT assay and adipocytes by Oil Red O stain. Osteocalcin and adiponectin levels in culture supernatants were determined by ELISA. Zn supplementation resulted in a modest increase in BMD, but serum osteocalcin and ALP activity increased significantly (P < 0.01, both). Serum levels of RANKL and TRAP were lower in OVX-Zn (vs OVX) rats (P < 0.01), whereas serum concentrations of adiponectin, Ca, and P did not differ by group. Osteocalcin level was significantly upregulated ex vivo (P < 0.01) in the supernatant of cultured OVX-Zn (vs OVX) cells, accompanied by a slight upturn in osteoblastic differentiation. However, Oil Red O uptake and adiponectin level in supernatant were sharply diminished in cultured OVX-Zn (vs OVX) cells (P < 0.01). Overall, we concluded that Zn contributes to bone mass by marginally stimulating differentiation and proliferation of osteoblasts and by effectively inhibiting osteoclastic and adipocytic differentiation of BMSCs.
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Affiliation(s)
- Binbin Li
- Department of Oral Pathology, Peking University School and Hospital of Stomatology, 22 Zhongguancun Avenue South, Haidian District, Beijing, 100081, People's Republic of China,
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Kamal R, Bansal SC, Khandelwal N, Rai DV, Dhawan DK. Moderate zinc supplementation during prolonged steroid therapy exacerbates bone loss in rats. Biol Trace Elem Res 2014; 160:383-91. [PMID: 25022244 DOI: 10.1007/s12011-014-0063-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Accepted: 07/01/2014] [Indexed: 11/24/2022]
Abstract
The present study was conducted to understand the influence of zinc on bone mineral metabolism in prednisolone-treated rats. Disturbance in bone mineral metabolism was induced in rats by subjecting them to prednisolone treatment for a period of 8 weeks. Female rats aged 6-8 weeks weighing 150 to 200 g were divided into four treatment groups, viz., normal control, prednisolone-treated (40 mg/kg body weight orally, thrice a week), zinc-treated (227 mg/L in drinking water, daily), and combined prednisolone + zinc-treated groups. Parameters such as changes in mineral levels in the bone and serum, bone mineral density (BMD), bone mineral content (BMC), and bone 99m-technetium-labeled methylene diphosphonate ((99m)Tc-MDP) uptake were studied in various treatment groups. Prednisolone treatment caused an appreciable decrease in calcium levels both in the bone and serum and also in bone dry weight, BMC, and BMD in rats. Prednisolone-treated rats when supplemented with zinc showed further reduction in calcium levels, bone dry weight, BMD, and BMC. The study therefore revealed that moderate intake of zinc as a nutritional supplement during steroid therapy could enhance calcium deficiency in the body and accelerate bone loss.
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Affiliation(s)
- Rozy Kamal
- Centre for Nuclear Medicine, University Institute of Emerging Areas in Science and Technology (UIEAST), Panjab University, Chandigarh, 160014, India
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In vitro proliferation and differentiation potential of bone marrow-derived mesenchymal stem cells from ovariectomized rats. Tissue Cell 2014; 46:450-6. [PMID: 25257163 DOI: 10.1016/j.tice.2014.08.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Revised: 07/14/2014] [Accepted: 08/06/2014] [Indexed: 11/20/2022]
Abstract
Bone marrow-derived mesenchymal stem cells (BMMSCs) from the patients suffering from age-related osteoporosis were found to have numerous degeneration, such as decreased growth rate, impaired capacity of differentiating into local tissue, and repressed telomerase activity. However, it is not clear whether post-menopausal osteoporotic bone is either subject to such decline in cellular function. In the present study, bone marrow cells were harvested from ovariectomized (OVX) and Sham rats and cultured in vitro at 3 months post-surgery. MTT assay indicated that the proliferation potential of (OVX)BMMSCs was always higher than that of (Sham)BMMSCs, no matter cultured in basic, osteoblastic or adipogenic medium. Alkaline phosphatase activity assay, Alizarin red S staining, Oil red O staining and real-time RT-PCR analysis further demonstrated that bilateral ovariectomization positively influenced the osteoblastic and adipogenic differentiation potential of BMMSCs, this action may be partly mediated through up-regulation of osteoblastic special markers core binding factor a1, collagen type I and low-density lipoprotein receptor-related protein 5, as well as adipogenic special markers peroxisome proliferators activated receptor gamma, CCAAT/enhancer binding protein alpha and adipocyte lipid-binding protein 2. These results may hold great promise for using post-menopausal osteoporotic bone as an attractive autologous marrow source for tissue engineering and cell-based therapies.
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