1
|
Brain-Type Creatine Kinase Release from Cultured Osteoclasts Exposed to Neridronate in Children Affected by Osteogenesis Imperfecta Type 1. Biomedicines 2023; 11:biomedicines11020458. [PMID: 36830994 PMCID: PMC9953364 DOI: 10.3390/biomedicines11020458] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 01/28/2023] [Accepted: 02/02/2023] [Indexed: 02/09/2023] Open
Abstract
Brain-type creatine kinase (CK-BB) increases during osteoclastogenesis, with high circulating amounts in type I osteogenesis imperfecta (OI) following treatment with neridronate, a bisphosphonate able to inhibit osteoclast activity and survival. The aim of this study was to demonstrate the correlation between osteoclastogenesis and CK-BB release from OI patients' osteoclasts treated with different concentrations of neridronate. Our patients showed reduced bone quality, increased levels of CTX I, a marker of bone resorption, and decreased levels of OPG, an inhibitor of osteoclastogenesis. In OI patients, the presence of MCSF and RANKL determined an increased secretion of CK-BB from osteoclasts (p = 0.04) compared with control conditions without these cytokines; interestingly, in the absence of these factors, the secretion of CK-BB is significantly elevated at 3 µmol/L compared with 0.03 and 1 µmol/L (p = 0.007). In healthy donors' cultures, the higher concentration of CK-BB can be detected following stimulation with 3 µmol/L neridronate compared with the untreated condition both with and without MCSF and RANKL (p = 0.03 and p = 0.006, respectively). Consistently, in osteoclast cultures, neridronate treatment is associated with a decrease in multinucleated TRAP+ cells, together with morphology changes typical of apoptosis. Consistently, in the media of the same osteoclast cultures, we demonstrated a significant increase in caspase-3 levels. In conclusion, our findings support the idea that CK-BB levels increase in the serum of OI-treated patients.
Collapse
|
2
|
Wang S, Qian X, Shen C, Sun Q, Jing Y, Liu B, Zhang K, Li M, Wang J, Zhou H, Dong C. The protective effects of lipoxin A4 on type 2 diabetes mellitus: A Chinese prospective cohort study. Front Endocrinol (Lausanne) 2023; 14:1109747. [PMID: 36742389 PMCID: PMC9892446 DOI: 10.3389/fendo.2023.1109747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 01/09/2023] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND Several cellular and animal studies have suggested that lipoxin A4 (LXA4) has a protective effect on type 2 diabetes mellitus (T2DM) development. However, little is known about whether LXA4 influences T2DM development at the population level. METHODS We included 2755 non-diabetic participants from a cohort study in China who were followed for about seven years. Cox proportional hazards model was used to estimate hazard ratios (HRs) and 95% confidence intervals (CI) for the association between LXA4 and incident T2DM. Mediation models were used to examine how serum lipids as mediators impact the association between LXA4 and T2DM. RESULTS In total, 172 newly diagnosed T2DM cases were identified. Multivariate-adjusted HR for T2DM in the fourth compared with the first quartile of LXA4 was 0.62 (95% CI: 0.40-0.96). When used the optimal cutoff value determined by the receiver operating characteristic curve, the results showed participants with LXA4 > 2.84 ng/mL had a decreased T2DM risk compared to those with LXA4 ≤ 2.84 ng/mL (HR: 0.63, 95% CI: 0.45-0.89). The effect of LXA4 on incident T2DM was significantly modified by gender (P -interaction = 0.024) and family history of diabetes (P -interaction = 0.025). Additionally, the association between LXA4 and incident T2DM was partially suppressed by the TyG and TG/HDL-c ratio, with a suppression proportion of 22.2% and 16.0%, respectively. CONCLUSIONS Higher LXA4 levels are significantly associated with a lower risk of T2DM development. The present findings would be helpful in understanding the effect of LXA4 on T2DM development at the population level.
Collapse
Affiliation(s)
- Sudan Wang
- Department of Epidemiology and Statistics, School of Public Health, Medical College of Soochow University, Soochow, Jiangsu, China
| | - Xiaoyan Qian
- Division of non-communicable diseases, Suzhou Industrial Park Centers for Disease Control and Prevention, Soochow, China
| | - Chao Shen
- Division of non-communicable diseases, Suzhou Industrial Park Centers for Disease Control and Prevention, Soochow, China
| | - Qian Sun
- Department of Epidemiology and Statistics, School of Public Health, Medical College of Soochow University, Soochow, Jiangsu, China
| | - Yang Jing
- Division of non-communicable diseases, Suzhou Industrial Park Centers for Disease Control and Prevention, Soochow, China
| | - Bingyue Liu
- Department of Epidemiology and Statistics, School of Public Health, Medical College of Soochow University, Soochow, Jiangsu, China
| | - Kexin Zhang
- Department of Epidemiology and Statistics, School of Public Health, Medical College of Soochow University, Soochow, Jiangsu, China
| | - Mengyuan Li
- Department of Epidemiology and Statistics, School of Public Health, Medical College of Soochow University, Soochow, Jiangsu, China
| | - Junrong Wang
- Department of Epidemiology and Statistics, School of Public Health, Medical College of Soochow University, Soochow, Jiangsu, China
| | - Hui Zhou
- Division of non-communicable diseases, Suzhou Industrial Park Centers for Disease Control and Prevention, Soochow, China
- *Correspondence: Chen Dong, ; Hui Zhou,
| | - Chen Dong
- Department of Epidemiology and Statistics, School of Public Health, Medical College of Soochow University, Soochow, Jiangsu, China
- *Correspondence: Chen Dong, ; Hui Zhou,
| |
Collapse
|
3
|
Use of Network Pharmacology and Molecular Docking Technology to Analyze the Mechanism of Action of Velvet Antler in the Treatment of Postmenopausal Osteoporosis. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2021; 2021:7144529. [PMID: 34671409 PMCID: PMC8523247 DOI: 10.1155/2021/7144529] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 09/27/2021] [Accepted: 09/29/2021] [Indexed: 11/17/2022]
Abstract
Deer velvet antlers are the young horns of male deer that are not ossified and densely overgrown. Velvet antler and its preparations have been widely used in the treatment of postmenopausal osteoporosis (PMOP) in recent years, although its mechanism of action in the human body remains unclear. To screen the effective ingredients and targets of velvet antler in the treatment of PMOP using network pharmacology and to explore the potential mechanisms of velvet antler action in such treatments, we screened the active ingredients and targets of velvet antler in the BATMAN-TCM database. We also screened the relevant targets of PMOP in the GeneCards and OMIM databases and then compared the targets at the intersection of both velvet antler and PMOP. We used Cytoscape 3.7.2 software to construct a network diagram of "disease-drug-components-targets" and a protein-protein interaction (PPI) network through the STRING database and screened out the core targets; the R language was then used to analyze the shared targets between antler and PMOP for GO-enrichment analysis and KEGG pathway-annotation analysis. Furthermore, we used the professional software Maestro 11.1 to verify the predictive analysis based on network pharmacology. Hematoxylin-eosin (H&E) staining and micro-CT were used to observe the changes in trabecular bone tissue, further confirming the results of network pharmacological analysis. The potentially effective components of velvet antler principally include 17β-E2, adenosine triphosphate, and oestrone. These components act on key target genes such as AKT1, IL6, MAPK3, TP53, EGFR, SRC, and TNF and regulate the PI3K/Akt-signaling and MAPK-signaling pathways. These molecules participate in a series of processes such as cellular differentiation, apoptosis, metabolism, and inflammation and can ultimately be used to treat PMOP; they reflect the overall regulation, network regulation, and protein interactions.
Collapse
|
4
|
Khodabandeh Z, Haghighat S, Tanideh N, Zare S, Farrokhi F, Karandish M, Iraji A. Comparing the effects of Elaegnus Angustifolia, Hypericum Perforatum and Psidium Guajava extracts on metabolic activity of dental pulp-derived mesenchymal stem cells. Cell Tissue Bank 2021; 23:143-155. [PMID: 33843009 DOI: 10.1007/s10561-021-09923-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Accepted: 03/30/2021] [Indexed: 02/07/2023]
Abstract
Dental pulp derived-mesenchymal stem cells (DP-MSCs) is considered a suitable are candidate for tissue engineering techniques and osseous reconstruction. Based on the hypothesis that Hypericum perforatum, Elaeagnus Angustifolia and Psidium guajava extracts can be used in cell-based bone tissue engineering due to meagre cytotoxicity response in the cell culture medium, their effects on the viability and metabolic activity of DP-MSCs were investigated and compared with each extract. DP-MSCs were extracted from human dental pulp, characterized by flow cytometry, and differentiated into Osteogenic and adipogenic lineages which were then cultured in different concentrations of E. Angustifolia, H. perforatum and P. guajava extracts at different time intervals followed by MTT assay evaluation. The dental pulp mesenchymal stem cells were evaluated for their plastic adherence ability, fibroblast-like and spindle morphology. According to flow cytometry data, isolated cells from DP-MSCs expressed MSCs markers. A comparison of herbal extracts' concentrations revealed that 500 μg/ml was toxic to dental pulp stem cells, a guide to the toxic dose for DP-MSCs. The P.guajava bore low toxicity and increased dental pulp stem cell viability in comparison to the other two herbal extracts. The hydro-alcoholic extracts of E. Angustifolia, H. perforatum, and P. guajava were efficient in DP-MSCs viability, and therefore were concluded to be useful in maintaining structural and functional cell viability. It was also concluded that the co-culture of stem cells with herbal elements could stimulate endogenous factors to enhance the proliferation and viability of MSCs.
Collapse
Affiliation(s)
- Zahra Khodabandeh
- Stem Cells Technology Research Center, Shiraz University of Medical Science, Shiraz, Iran
| | - Sara Haghighat
- School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Nader Tanideh
- Stem Cells Technology Research Center, Shiraz University of Medical Science, Shiraz, Iran
- Pharmacology Department, Shiraz Medical School, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Shahrokh Zare
- Stem Cells Technology Research Center, Shiraz University of Medical Science, Shiraz, Iran
| | - Farnaz Farrokhi
- School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Maryam Karandish
- Orthodontic Department, Dental School, Shiraz University of Medical Sciences, Shiraz, Iran.
| | - Aida Iraji
- Medicinal and Natural Products Chemistry Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
- Central Research Laboratory, Shiraz University of Medical Sciences, Ghasrdasht St, Shiraz, Iran
| |
Collapse
|
5
|
Wei J, Li Y, Liu Q, Lan Y, Wei C, Tian K, Wu L, Lin C, Xu J, Zhao J, Yang Y. Betulinic Acid Protects From Bone Loss in Ovariectomized Mice and Suppresses RANKL-Associated Osteoclastogenesis by Inhibiting the MAPK and NFATc1 Pathways. Front Pharmacol 2020; 11:1025. [PMID: 32733253 PMCID: PMC7358641 DOI: 10.3389/fphar.2020.01025] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Accepted: 06/24/2020] [Indexed: 12/14/2022] Open
Abstract
Osteoclasts with elevated bone resorption are commonly present in postmenopausal osteoporosis, and other osteolytic pathologies. Therefore, suppressing osteoclast generation and function has been the main focus of osteoporosis treatment. Betulinic acid (BA) represents a triterpenoid mainly purified from the bark of Betulaceae. BA shows multiple biological activities, including antitumor and anti-HIV properties, but its effect on osteolytic conditions is unknown. Here, BA suppressed receptor activator of nuclear factor‐κB ligand (RANKL)‐associated osteoclastogenesis and bone resorptive function, as assessed by tartrate‐resistant acid phosphatase (TRAP) staining, fibrous actin ring generation, and hydroxyapatite resorption assays. Mechanistically, BA downregulated the expression of osteoclastic-specific genes. Western blot analysis revealed that BA significantly interrupted ERK, JNK and p38 MAPK activation as well as intracellular reactive oxygen species (ROS) production, thus altering c-Fos and NFATc1 activation. Corroborating the above findings in cell-based assays, BA prevented ovariectomy-associated bone loss in an animal model. In conclusion, these findings suggest that BA can inhibit osteoclast generation and function as well as the RANKL signaling pathway, and might be used for treating osteoclast-related osteoporosis.
Collapse
Affiliation(s)
- Jiyong Wei
- Research Centre for Regenerative Medicine, Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China.,Guangxi Collaborative Innovation Center for Biomedicine, Life Sciences Institute, Guangxi Medical University, Nanning, China.,Department of Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Guangxi Medical University, Nanning, China.,Department of Orthopedics, The First People's Hospital of Nanning, Nanning, China
| | - Yicheng Li
- Research Centre for Regenerative Medicine, Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China
| | - Qian Liu
- Research Centre for Regenerative Medicine, Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China.,School of Biomedical Sciences, The University of Western Australia, Perth, WA, Australia
| | - Yanni Lan
- Department of Pharmacy, People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, China
| | - Chengming Wei
- Research Centre for Regenerative Medicine, Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China
| | - Kun Tian
- Research Centre for Regenerative Medicine, Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China.,Guangxi Collaborative Innovation Center for Biomedicine, Life Sciences Institute, Guangxi Medical University, Nanning, China.,Department of Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Guangxi Medical University, Nanning, China
| | - Liwei Wu
- Research Centre for Regenerative Medicine, Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China.,Guangxi Collaborative Innovation Center for Biomedicine, Life Sciences Institute, Guangxi Medical University, Nanning, China.,Department of Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Guangxi Medical University, Nanning, China
| | - Chunbo Lin
- Orthopaedics, Langdong Hospital of Guangxi Medical University, Guangxi Medical University, Nanning, China
| | - Jiake Xu
- Research Centre for Regenerative Medicine, Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China.,School of Biomedical Sciences, The University of Western Australia, Perth, WA, Australia
| | - Jinmin Zhao
- Research Centre for Regenerative Medicine, Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China.,Guangxi Collaborative Innovation Center for Biomedicine, Life Sciences Institute, Guangxi Medical University, Nanning, China.,Department of Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Guangxi Medical University, Nanning, China
| | - Yuan Yang
- Research Centre for Regenerative Medicine, Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China.,Guangxi Collaborative Innovation Center for Biomedicine, Life Sciences Institute, Guangxi Medical University, Nanning, China.,Orthopaedics, Langdong Hospital of Guangxi Medical University, Guangxi Medical University, Nanning, China
| |
Collapse
|
6
|
Posritong S, Hong JM, Eleniste PP, McIntyre PW, Wu JL, Himes ER, Patel V, Kacena MA, Bruzzaniti A. Pyk2 deficiency potentiates osteoblast differentiation and mineralizing activity in response to estrogen or raloxifene. Mol Cell Endocrinol 2018; 474:35-47. [PMID: 29428397 PMCID: PMC6057828 DOI: 10.1016/j.mce.2018.02.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 02/07/2018] [Accepted: 02/07/2018] [Indexed: 02/07/2023]
Abstract
Bone remodeling is controlled by the actions of bone-degrading osteoclasts and bone-forming osteoblasts (OBs). Aging and loss of estrogen after menopause affects bone mass and quality. Estrogen therapy, including selective estrogen receptor modulators (SERMs), can prevent bone loss and increase bone mineral density in post-menopausal women. Although investigations of the effects of estrogen on osteoclast activity are well advanced, the mechanism of action of estrogen on OBs is still unclear. The proline-rich tyrosine kinase 2 (Pyk2) is important for bone formation and female mice lacking Pyk2 (Pyk2-KO) exhibit elevated bone mass, increased bone formation rate and reduced osteoclast activity. Therefore, in the current study, we examined the role of estrogen signaling on the mechanism of action of Pyk2 in OBs. As expected, Pyk2-KO OBs showed significantly higher proliferation, matrix formation, and mineralization than WT OBs. In addition we found that Pyk2-KO OBs cultured in the presence of either 17β-estradiol (E2) or raloxifene, a SERM used for the treatment of post-menopausal osteoporosis, showed a further robust increase in alkaline phosphatase (ALP) activity and mineralization. We examined the possible mechanism of action and found that Pyk2 deletion promotes the proteasome-mediated degradation of estrogen receptor α (ERα), but not estrogen receptor β (ERβ). As a consequence, E2 signaling via ERβ was enhanced in Pyk2-KO OBs. In addition, we found that Pyk2 deletion and E2 stimulation had an additive effect on ERK phosphorylation, which is known to stimulate cell differentiation and survival. Our findings suggest that in the absence of Pyk2, estrogen exerts an osteogenic effect on OBs through altered ERα and ERβ signaling. Thus, targeting Pyk2, in combination with estrogen or raloxifene, may be a novel strategy for the prevention and/or treatment of bone loss diseases.
Collapse
Affiliation(s)
- Sumana Posritong
- Department of Biomedical and Applied Sciences, Indiana University School of Dentistry, Indianapolis, IN, 46202, USA.
| | - Jung Min Hong
- Department of Biomedical and Applied Sciences, Indiana University School of Dentistry, Indianapolis, IN, 46202, USA.
| | - Pierre P Eleniste
- Department of Biomedical and Applied Sciences, Indiana University School of Dentistry, Indianapolis, IN, 46202, USA.
| | - Patrick W McIntyre
- Department of Biomedical and Applied Sciences, Indiana University School of Dentistry, Indianapolis, IN, 46202, USA.
| | - Jennifer L Wu
- Department of Biomedical and Applied Sciences, Indiana University School of Dentistry, Indianapolis, IN, 46202, USA.
| | - Evan R Himes
- Department of Orthopaedic Surgery, Indiana University School of Medicine, Indianapolis, IN, 46202, USA.
| | - Vruti Patel
- Department of Biomedical and Applied Sciences, Indiana University School of Dentistry, Indianapolis, IN, 46202, USA.
| | - Melissa A Kacena
- Department of Orthopaedic Surgery, Indiana University School of Medicine, Indianapolis, IN, 46202, USA.
| | - Angela Bruzzaniti
- Department of Biomedical and Applied Sciences, Indiana University School of Dentistry, Indianapolis, IN, 46202, USA.
| |
Collapse
|
7
|
Li J, Padwa BL, Zhou S, Mullokandova J, LeBoff MS, Glowacki J. Synergistic effect of 1α,25-dihydroxyvitamin D 3 and 17β-estradiol on osteoblast differentiation of pediatric MSCs. J Steroid Biochem Mol Biol 2018; 177:103-108. [PMID: 28765038 DOI: 10.1016/j.jsbmb.2017.07.032] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 07/18/2017] [Accepted: 07/25/2017] [Indexed: 12/24/2022]
Abstract
Vitamin D is essential for mineral homeostasis and contributes to bone metabolism by stimulating osteoblast differentiation of marrow stromal cells (MSCs). In this study, we used MSCs from pre-pubertal girls and boys to test the hypothesis that 1α,25(OH)2D and 17β-estradiol have synergistic effects on these MSCs, and what mechanism is involved. With IRB approval, we isolated MSCs from discarded excess iliac marrow graft from children undergoing alveolar cleft repair. Plasma was available from 8 female (9.3±0.2years) and 8 male (9.6±0.1years) subjects for hormone assays [25(OH)D, total testosterone, 17β-estradiol, estrone, DHEA-S, Growth Hormone, IGF-I]. RT-PCR was used for gene expression. Alkaline phosphatase (ALP) activity was used to measure osteoblast differentiation at day 7; alizarin red was used to measure matrix mineralization at day 21. All subjects were pre-pubertal based on their hormone levels. Serum 25(OH)D levels ranged from 13.1 to 26.4ng/mL, with 75% below 20ng/mL. Constitutive gene expression of VDR and ERα, β varied from subject to subject with no association with sex or serum chemistries. In osteoblastogenic medium, 1α,25(OH)2D3 (10nM) increased ALP activity by 36% (p<0.05) in MSCs; 10nM of E2 was not stimulatory but the combination of 1α,25(OH)2D3 and E2 increased ALP 151% (p<0.05 vs. control) and by 84.5% (p<0.05 vs. 1α,25(OH)2D3 alone). The combination of 1α,25(OH)2D3 and E2 significantly increased mineralization 11-fold, compared with either agent alone. Twenty-four hour treatment with 1α,25(OH)2D3 (10nM) or E2 (10nM) upregulated each other's receptor by as much as 5.8-fold for ERα and 2.9-fold for the VDR. In summary, 1α,25(OH)2D3 stimulated osteoblast differentiation and matrix mineralization with MSCs from pre-pubertal subjects, with a synergistic effect of E2, mediated by upregulated receptor levels, at least in part. These studies add new information about the regulation of human osteoblast differentiation, effects of 1α,25(OH)2D3 and E2 on MSCs, and the importance of vitamin D for skeletal health.
Collapse
Affiliation(s)
- Jing Li
- Department of Orthopedic Surgery, Brigham and Women's Hospital, Boston, MA, USA
| | - Bonnie L Padwa
- Department of Plastic and Oral Surgery, Boston Children's Hospital, Boston, MA, USA
| | - Shuanhu Zhou
- Department of Orthopedic Surgery, Brigham and Women's Hospital, Boston, MA, USA
| | - Julia Mullokandova
- Department of Orthopedic Surgery, Brigham and Women's Hospital, Boston, MA, USA
| | - Meryl S LeBoff
- Department of Medicine, Brigham and Women's Hospital, Boston, MA, USA
| | - Julie Glowacki
- Department of Orthopedic Surgery, Brigham and Women's Hospital, Boston, MA, USA.
| |
Collapse
|
8
|
Han Y, Wang X, Ma D, Wu X, Yang P, Zhang J. Ipriflavone promotes proliferation and osteogenic differentiation of periodontal ligament cells by activating GPR30/PI3K/AKT signaling pathway. DRUG DESIGN DEVELOPMENT AND THERAPY 2018; 12:137-148. [PMID: 29391778 PMCID: PMC5768194 DOI: 10.2147/dddt.s148457] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Objectives This study was performed to investigate the effects and mechanism of ipriflavone (IP) on the proliferation and osteoblastic differentiation of periodontal ligament cells in vitro and periodontal tissue remodeling following orthodontic tooth movement (OTM) in vivo. Materials and methods Human periodontal ligament cells (hPDLCs) were cultured in vitro and cell counting kit-8, alkaline phosphatase (ALP) activity assay, plate clone formation assay, and alizarin red staining were used to test proliferation and osteogenic differentiation of hPDLCs. What is more, the expression of ALP, Runx2, and GPR30 was examined by real-time polymerase chain reaction and Western blot. To find out if PI3K/AKT signaling pathway was involved in the process, AKT and p-AKT were examined by Western blot. LY294002 (PI3K signaling pathway inhibitor) and small interfering RNA targeting GPR30 mRNA (siGPR30) were used to verify the function of GPR30-mediated PI3K/AKT pathway in this process. Twenty-four male Wistar rats were randomized into 2 groups, the control group with force application and the IP group with force application plus IP. Morphological changes in the periodontal tissue between roots of teeth were investigated using hematoxylin and eosin (HE) staining and bone morphogenetic protein-2 was detected to assess bone remodeling by immunohistochemical staining. Results In vitro, 10−7 M IP was selected significantly promoting proliferation, ALP activity, colony forming efficiency, and mineral deposition (P<0.05) on hPDLCs. Gene expressions of ALP, Runx2, GPR30, and p-AKT were all upregulated than the control group (P<0.05). According to the mechanism, promotion of ALP and Runx2 interdicted by LY294002 and siGPR30 reduced the activation of PI3K/AKT signaling pathway. In addition, HE staining and immunohistochemical staining results showed that the IP group had more new bone formation in the periodontal tissue compared to the control group in vivo. Conclusion IP can promote the expression of ALP and Runx2 which was probably related to the GPR30-mediated PI3K/AKT signaling pathway. Moreover, IP coordination seemed to have the potential to prevent relapsing following OTM.
Collapse
Affiliation(s)
- Yuanyuan Han
- Department of Orthodontics, Faculty of Stomatology, Shandong University, Jinan.,Shandong Provincial Key Laboratory of Oral Tissue Regeneration, School of Stomatology, Shandong University, Jinan
| | - Xuxia Wang
- Shandong Provincial Key Laboratory of Oral Tissue Regeneration, School of Stomatology, Shandong University, Jinan.,Department of Oral and Maxillofacial Surgery, Faculty of Stomatology, Shandong University, Jinan, China
| | - Dan Ma
- Department of Orthodontics, Faculty of Stomatology, Shandong University, Jinan.,Shandong Provincial Key Laboratory of Oral Tissue Regeneration, School of Stomatology, Shandong University, Jinan
| | - Xiaoxiao Wu
- Department of Orthodontics, Faculty of Stomatology, Shandong University, Jinan.,Shandong Provincial Key Laboratory of Oral Tissue Regeneration, School of Stomatology, Shandong University, Jinan
| | - Panpan Yang
- Department of Orthodontics, Faculty of Stomatology, Shandong University, Jinan.,Shandong Provincial Key Laboratory of Oral Tissue Regeneration, School of Stomatology, Shandong University, Jinan
| | - Jun Zhang
- Department of Orthodontics, Faculty of Stomatology, Shandong University, Jinan.,Shandong Provincial Key Laboratory of Oral Tissue Regeneration, School of Stomatology, Shandong University, Jinan
| |
Collapse
|
9
|
Somjen D, Sharfman ZT, Katzburg S, Sharon O, Maman E, Salai M, Stern N, Dolkart O. Rivaroxaban significantly inhibits the stimulatory effects of bone-modulating hormones: In vitro study of primary female osteoblasts. Connect Tissue Res 2017; 58:215-220. [PMID: 27661794 DOI: 10.1080/03008207.2016.1220942] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
BACKGROUND Anticoagulant therapy is a mainstay of treatment subsequent to major orthopedic surgeries. Evidence linking anticoagulant therapy, osteoporosis, and delayed fracture healing is not conclusive. We have previously reported that rivaroxaban significantly inhibited cell growth and energy metabolism in a human osteoblastic cell line. This study analyzed the response of primary female osteoblast cells to rivaroxaban in combination with various bone-modulating hormones. METHODS Bone samples were taken from both premenopausal (pre-Ob) and postmenopausal (post-Ob) women. Cells were isolated from each sample and cultured to sub-confluence. Each sample was then treated with Rivaroxaban (10 µg/ml) in combination with the following hormones or with the hormones alone for 24 hours: 30nM estradiol-17β (E2), 390nM estrogen receptor α (ERα) agonist PPT, 420nM estrogen receptor β (ERβ) agonist DPN, 50nM parathyroid hormone (PTH), and 1nM of vitamin D analog JKF. RESULTS No effects were observed after exposure to rivaroxaban alone. When pre-Ob and post-Ob cells were exposed to the bone-modulating hormones as a control experiment, DNA synthesis and creatine kinase (CK)-specific activity was significantly stimulated with a greater response in the pre-Ob cells. When the cells were exposed to rivaroxaban in combination with bone-modulating hormones, the increased DNA synthesis and CK-specific activity previously observed were completely attenuated. CONCLUSIONS Rivaroxaban significantly inhibited the stimulatory effects of bone-modulating hormones in both pre-Ob and post-Ob primary human cell lines. This finding may have clinical relevance for patients at high risk of osteoporosis managed with rivaroxaban or other factor Xa inhibitors.
Collapse
Affiliation(s)
- Dalia Somjen
- a Institute of Endocrinology, Metabolism and Hypertension, Tel-Aviv Sourasky Medical Center and the Sackler Faculty of Medicine , Tel-Aviv University , Tel-Aviv , Israel
| | - Zachary T Sharfman
- b Division of Orthopedic Surgery, Tel-Aviv Sourasky Medical Center and the Sackler Faculty of Medicine , Tel-Aviv University , Tel-Aviv , Israel
| | - Sara Katzburg
- a Institute of Endocrinology, Metabolism and Hypertension, Tel-Aviv Sourasky Medical Center and the Sackler Faculty of Medicine , Tel-Aviv University , Tel-Aviv , Israel
| | - Orli Sharon
- a Institute of Endocrinology, Metabolism and Hypertension, Tel-Aviv Sourasky Medical Center and the Sackler Faculty of Medicine , Tel-Aviv University , Tel-Aviv , Israel
| | - Eran Maman
- b Division of Orthopedic Surgery, Tel-Aviv Sourasky Medical Center and the Sackler Faculty of Medicine , Tel-Aviv University , Tel-Aviv , Israel
| | - Moshe Salai
- b Division of Orthopedic Surgery, Tel-Aviv Sourasky Medical Center and the Sackler Faculty of Medicine , Tel-Aviv University , Tel-Aviv , Israel
| | - Naftali Stern
- a Institute of Endocrinology, Metabolism and Hypertension, Tel-Aviv Sourasky Medical Center and the Sackler Faculty of Medicine , Tel-Aviv University , Tel-Aviv , Israel
| | - Oleg Dolkart
- b Division of Orthopedic Surgery, Tel-Aviv Sourasky Medical Center and the Sackler Faculty of Medicine , Tel-Aviv University , Tel-Aviv , Israel
| |
Collapse
|
10
|
Maman E, Somjen D, Maman E, Katzburg S, Sharfman ZT, Stern N, Dolkart O. The response of cells derived from the supraspinatus tendon to estrogen and calciotropic hormone stimulations: in vitro study. Connect Tissue Res 2015; 57:124-30. [PMID: 26646255 DOI: 10.3109/03008207.2015.1114615] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
PURPOSE The most frequent complications after rotator cuff repair (RCR) are non-healing and re-tear. Age and gender are both proven risk factors for faulty RCR. This study analyzed the effects of female sex steroids and calciotropic hormones on tendon-derived cell characteristics. METHODS Tendon-derived cells from rat supraspinatus were treated with estradiol-17β (E2); soy isoflavones (daidzein, genistein, biochainin A); raloxifene and estrogen receptors α and β agonists and antagonists; and less-calcemic vitamin-D analog, parathyroid hormone, and vehicle control for 24 h. Cell proliferation and mRNA expression of estrogen receptor α and β, vitamin-D receptor (VDR), scleraxis, and collagen-1 were assessed. RESULTS E2, Biochainin A, raloxifene, and vitamin-D significantly increased tendon-derived cell proliferation. Estrogen receptor α antagonists neutralized tendon-derived cells response to estradiol 17-β; however, estrogen receptor β antagonists did not have an effect. Scleraxis expression decreased following estradiol 17-β and vitamin-D treatments. Vitamin-D significantly reduced collagen-1 expression, while estradiol 17-β had no effect. Vitamin-D and estradiol 17-β upregulated VDR expression. CONCLUSIONS Significant tendon-derived cell proliferation can be achieved with commonly prescribed female sex and calciotropic hormones. However, collagen-1 expression remained constant or decreased following the administration of these hormones. Female sex steroids and vitamin-D promoted tendon-derived cell proliferation via estrogen receptor α and VDR, not estrogen receptor β. Amplified cell proliferation was not associated with increased scleraxis and collagen-1 expression. These results have important implications to the properties of healing tendon and possible pharmaceutical therapies for patients with torn RC. Further research is warranted to expose the underling mechanisms of these effects.
Collapse
Affiliation(s)
- Eran Maman
- a Shoulder Unit, Division of Orthopedic Surgery, Tel-Aviv Medical Center and the Sackler Faculty of Medicine , Tel-Aviv University , Tel-Aviv , Israel
| | - Dalia Somjen
- b Institute of Endocrinology, Metabolism and Hypertension, Tel-Aviv Medical Center and the Sackler Faculty of Medicine , Tel-Aviv University , Tel-Aviv , Israel
| | - Ettie Maman
- c IVF unit, Department of Obstetrics and Gynecology , Sheba Medical Center, Tel Hashomer, Tel-Aviv University , Tel-Aviv , Israel
| | - Sarah Katzburg
- b Institute of Endocrinology, Metabolism and Hypertension, Tel-Aviv Medical Center and the Sackler Faculty of Medicine , Tel-Aviv University , Tel-Aviv , Israel
| | - Zachary T Sharfman
- a Shoulder Unit, Division of Orthopedic Surgery, Tel-Aviv Medical Center and the Sackler Faculty of Medicine , Tel-Aviv University , Tel-Aviv , Israel
| | - Naftali Stern
- b Institute of Endocrinology, Metabolism and Hypertension, Tel-Aviv Medical Center and the Sackler Faculty of Medicine , Tel-Aviv University , Tel-Aviv , Israel
| | - Oleg Dolkart
- a Shoulder Unit, Division of Orthopedic Surgery, Tel-Aviv Medical Center and the Sackler Faculty of Medicine , Tel-Aviv University , Tel-Aviv , Israel
| |
Collapse
|
11
|
Gao B, Huang Q, Jie Q, Wang L, Zhang HY, Liu J, Yang L, Luo ZJ. Dose-response estrogen promotes osteogenic differentiation via GPR40 (FFAR1) in murine BMMSCs. Biochimie 2015; 110:36-44. [DOI: 10.1016/j.biochi.2015.01.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Accepted: 01/01/2015] [Indexed: 12/11/2022]
|
12
|
Estrogen and phenol red free medium for osteoblast culture: study of the mineralization ability. Cytotechnology 2015; 68:1623-32. [PMID: 25634598 DOI: 10.1007/s10616-015-9844-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Accepted: 01/12/2015] [Indexed: 02/02/2023] Open
Abstract
To design an estrogen and phenol red free medium for cell culture and check its effectiveness and safety on osteoblast growth it is necessary to maintain the estrogen receptors free for tests. For this purpose, we tested some modifications of the traditional culture media: estrogen depleted fetal bovine serum; estrogen charcoal stripped fetal bovine serum and phenol red free α-MEM. The aim of this work is to examine the effects of its depletion in the proliferation, differentiation, and toxicity of mesenchymal stromal cells differentiated into osteoblasts to obtain an effective interference free culture medium for in vitro studies, focused on non-previously studied estrogen receptors. We performed viability tests using the following techniques: MTT, alkaline phosphatase specific activity, formation of mineralized matrix by Alizarin technique and analysis of SEM/EDX of mineralized nodules. The results showed that the culture media with estrogen free α-MEM + phenol red free α-MEM did not impact viability, alkaline phosphatase activity and mineralization of the osteoblasts culture compared to control. In addition, its nodules possess Ca/P ratio similar to hydroxyapatite nodules on the 14th and 21st day. In conclusion, the modified culture medium with phenol red free α-MEM with estrogen depleted fetal bovine serum can be safely used in experiments where the estrogen receptors need to be free.
Collapse
|
13
|
Martinkovich S, Shah D, Planey SL, Arnott JA. Selective estrogen receptor modulators: tissue specificity and clinical utility. Clin Interv Aging 2014; 9:1437-52. [PMID: 25210448 PMCID: PMC4154886 DOI: 10.2147/cia.s66690] [Citation(s) in RCA: 85] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Selective estrogen receptor modulators (SERMs) are a diverse group of nonsteroidal compounds that function as agonists or antagonists for estrogen receptors (ERs) in a target gene-specific and tissue-specific fashion. SERM specificity involves tissue-specific expression of ER subtypes, differential expression of co-regulatory proteins in various tissues, and varying ER conformational changes induced by ligand binding. To date, the major clinical applications of SERMs are their use in the prevention and treatment of breast cancer, the prevention of osteoporosis, and the maintenance of beneficial serum lipid profiles in postmenopausal women. However, SERMs have also been found to promote adverse effects, including thromboembolic events and, in some cases, carcinogenesis, that have proven to be obstacles in their clinical utility. In this review, we discuss the mechanisms of SERM tissue specificity and highlight the therapeutic application of well-known and emergent SERMs.
Collapse
Affiliation(s)
- Stephen Martinkovich
- Department of Basic Sciences, The Commonwealth Medical College, Scranton, PA, USA
| | - Darshan Shah
- Department of Basic Sciences, The Commonwealth Medical College, Scranton, PA, USA
| | - Sonia Lobo Planey
- Department of Basic Sciences, The Commonwealth Medical College, Scranton, PA, USA
| | - John A Arnott
- Department of Basic Sciences, The Commonwealth Medical College, Scranton, PA, USA
| |
Collapse
|
14
|
Fester L, Labitzke J, Hinz R, Behem C, Horling K, Bernhard T, Bader MI, Vollmer G, Rune GM. Estradiol responsiveness of synaptopodin in hippocampal neurons is mediated by estrogen receptor β. J Steroid Biochem Mol Biol 2013; 138:455-61. [PMID: 24076016 DOI: 10.1016/j.jsbmb.2013.09.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Revised: 08/14/2013] [Accepted: 09/05/2013] [Indexed: 10/26/2022]
Abstract
In the hippocampus, synaptic proteins, as studied so far, have been shown to be upregulated by 17β-estradiol, while inhibition of local estradiol synthesis consistently downregulates them. As an exception to this rule, we have previously shown that synaptopodin, an actin-associated postsynaptic protein, is downregulated in response to estradiol in dissociated cultured hippocampal neurons. In this study, we show, unexpectedly, that synaptopodin is downregulated in the hippocampus of aromatase knock-out mice and that inhibition of neuronal estradiol synthesis using the aromatase inhibitor letrozole also downregulates synaptopodin in these cultures. Moreover, the effects of estradiol and letrozole are additive, suggesting a subtle balance between available ligand and receptor. Using selective estrogen receptor agonists and antagonists, we consequently studied the effects of estrogen receptor subtypes on synaptopodin expression in our hippocampal cultures. We found that estradiol-induced downregulation of synaptopodin is mediated by estrogen receptor β. Estrogen receptor β in turn, is upregulated in response to intracellular estradiol ablation following inhibition of estradiol synthesis by letrozole in dissociated hippocampal cultures, as well as in the hippocampus of the aromatase knock-out mouse. Thus, it appears that both the application of estradiol, via binding to estrogen receptor β, and letrozole, via upregulation of estrogen receptor β, eventually result in a downregulation of synaptopodin. Our data show that the synaptic plasticity caused by estradiol is subject to a subtle balance of the levels of estrogen receptor subtypes regulated by the available ligands. In addition, both seem to be part of a homeostatic feedback mechanism.
Collapse
Affiliation(s)
- Lars Fester
- Institute of Neuroanatomy, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany
| | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Asl SZ, Khaksari M, Khachki AS, Shahrokhi N, Nourizade S. Contribution of estrogen receptors alpha and beta in the brain response to traumatic brain injury. J Neurosurg 2013; 119:353-61. [PMID: 23724987 DOI: 10.3171/2013.4.jns121636] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
OBJECT Although there is evidence that estradiol has neuroprotective effects after traumatic brain injury (TBI) in female rats, it is unclear which estrogen receptor (ER) subtype, ERα or ERβ, mediates this effect. The authors therefore examined the roles of the different ERs in this effect. Here the authors used the ERα selective agonist propyl pyrazole triol (PPT) and the ERβ selective agonist diarylpropionitrile (DPN) alone and in combination in female rats to investigate this question. METHODS Before the ovariectomized animals were injured using the Marmarou TBI technique, they were randomly divided into the following 9 groups: control, sham, TBI, vehicle, E1 (physiological dose of 17-β estradiol), E2 (pharmacological dose of 17-β estradiol), PPT, DPN, and PPT+DPN. Levels of blood-brain barrier (BBB) disruption (5 hours) and water content (24 hours) were evaluated after TBI. In groups receiving drugs or vehicle, treatment was administered as a single dose intraperitoneally 30 minutes after induction of TBI. RESULTS Results showed that brain edema or brain water content after TBI was lower (p < 0.001) in the E2, PPT, DPN, and PPT+DPN groups than it was in the vehicle group. After trauma, the Evans blue dye content or BBB permeability was significantly higher in the TBI and vehicle groups (p < 0.001) than in the E2, PPT, DPN, and PPT+DPN groups. The inhibitory effects of PPT+DPN on brain water content, neurological scores, and Evans blue dye content were the highest for all groups. Although both PPT and DPN increased neurological scores after TBI, PPT appears to be more effective in increasing neurological scores. CONCLUSIONS Neuroprotective effects of estradiol on brain edema, BBB permeability, and neurological scores are mediated through both ERα and ERβ. This may suggest a therapeutic potential in the brain trauma for ER-specific agonists.
Collapse
Affiliation(s)
- Saleh Zahedi Asl
- Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran
| | | | | | | | | |
Collapse
|
16
|
Somjen D, Katzburg S, Gigi R, Dolkart O, Sharon O, Salai M, Stern N. Rivaroxaban, a direct inhibitor of the coagulation factor Xa interferes with hormonal-induced physiological modulations in human female osteoblastic cell line SaSO2. J Steroid Biochem Mol Biol 2013; 135:67-70. [PMID: 23333933 DOI: 10.1016/j.jsbmb.2013.01.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2012] [Revised: 01/06/2013] [Accepted: 01/07/2013] [Indexed: 11/25/2022]
Abstract
The use of anticoagulants has been associated with systemic osteoporosis and increased risk for poor fracture healing but is inevitable following major orthopedic surgery of lower limbs. Rivaroxaban A (R) is an anticoagulant recently introduced in the clinical setting, which is a specific factor Xa inhibitor. We reported previously that R significantly inhibited cell growth, energy metabolism and alkaline phosphatase activity in human osteoblastic cell line SaOS2, with no effect on mineralization, indicating transient inhibition of bone formation. We now investigated the effects of R on SaOS2 response to osteoblast-modulating hormones. At sub-confluence cells were treated with: estradiol-17β (E2), the phytoestrogens daidzein (D) and biochainin A (BA), the carboxy-pytoestrogenic derivative carboxy-D (cD), the estrogen receptor α (ERα) agonist PPT, the estrogen receptor β (ERβ) agonist DPN, parathyroid hormone (PTH) and several vitamin D metabolites and analogs with/without R for 24h. All hormones tested stimulated significantly DNA synthesis (DNA), creatine kinase (CK) and alkaline phosphatase (ALP) specific activities, but all these stimulations were totally inhibited when given together with R. R had no effect on mRNA expression of ERα, ERβ and 25 Hydroxy-vitamin D3-1α hydroxylase (1OHase), but inhibited hormonal modulations of mRNA expressions. In conclusion R inhibited significantly hormonal stimulation of different parameters indicating inhibition of not only the early stages of bone formation, but also the stimulatory effects of bone modulating hormones with a yet unclear mechanism. The relevance of these findings to human bone physiology is yet to be investigated.
Collapse
Affiliation(s)
- Dalia Somjen
- Institute of Endocrinology, Metabolism and Hypertension, Tel-Aviv Sourasky Medical Center and the Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv 64239, Israel.
| | | | | | | | | | | | | |
Collapse
|
17
|
Ming LG, Chen KM, Xian CJ. Functions and action mechanisms of flavonoids genistein and icariin in regulating bone remodeling. J Cell Physiol 2013; 228:513-21. [PMID: 22777826 DOI: 10.1002/jcp.24158] [Citation(s) in RCA: 156] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2012] [Accepted: 07/02/2012] [Indexed: 12/12/2022]
Abstract
Increasingly natural products particularly flavonoids are being explored for their therapeutic potentials in reducing bone loss and maintaining bone health. This study has reviewed previous studies on the two better known flavonoids, genistein and icariin, their structures, functions, action mechanisms, relative potency, and potential application in regulating bone remodeling and preventing bone loss. Genistein, an isoflavone abundant in soy, has dual functions on bone cells, able to inhibit bone resorption activity of osteoclasts and stimulate osteogenic differentiation and maturation of bone marrow stromal progenitor cells (BMSCs) and osteoblasts. Genistein is an estrogen receptor (ER)-selective binding phytoestrogen, with a greater affinity to ERβ. Genistein inhibits tyrosine kinases and inhibits DNA topoisomerases I and II, and may act as an antioxidant. Genistein enhances osteoblastic differentiation and maturation by activation of ER, p38MAPK-Runx2, and NO/cGMP pathways, and it inhibits osteoclast formation and bone resorption through inducing osteoclastogenic inhibitor osteoprotegerin (OPG) and blocking NF-κB signaling. Icariin, a prenylated flavonol glycoside isolated from Epimedium herb, stimulates osteogenic differentiation of BMSCs and inhibits bone resorption activity of osteoclasts. Icariin, whose metabolites include icariside I, icariside II, icaritin, and desmethylicaritin, has no estrogenic activity. However, icariin is more potent than genistein in promoting osteogenic differentiation and maturation of osteoblasts. The existence of a prenyl group on C-8 of icariin molecular structure has been suggested to be the reason why icariin is more potent than genistein in osteogenic activity. Thus, the prenylflavonoids may represent a class of flavonoids with a higher osteogenic activity.
Collapse
Affiliation(s)
- Lei-Guo Ming
- Institute of Orthopaedics, Lanzhou General Hospital, Lanzhou Command of PLA, Lanzhou, People's Republic of China
| | | | | |
Collapse
|
18
|
Somjen D, Katzburg S, Kaye AM, Posner GH. Age-dependent responsiveness of human female bone cells to vitamin D analog and PTH. J Endocrinol Invest 2013; 36:118-22. [PMID: 23481611 DOI: 10.1007/bf03346746] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Vitamin D less-calcemic analog JKF 1624 F2-2 (JKF) and PTH 1-34 stimulate in human female cultured osteoblasts (Ob) DNA synthesis (DNA), creatine kinase specific activity (CK), 1α, 25 vitamin D hydroxylase mRNA (1OHase) expression and 1,25(OH)2D3 (1,25) production, estrogen receptors (ER) mRNA expression and intracellular and membranal estrogen binding. In the present study, cultured Ob from different ages were subjected to hormonal stimulations and analyzed for different parameters. We found: 1) ERα expression is higher and ERβ expression is lower in pre-meno - pausal Ob (prOb), with similar intracellular and membranal binding. 2) JKF and PTH up-regulated ERα and JKF downregulated ERβ in both Ob, while PTH stimulated it in post- (poOb) and inhibited it in prOb. 3) There is higher expression of 1OHase mRNA in prOb, but 1,25 production is similar. Both parameters were hormonally stimulated to higher extent in prOb. 4) Ob express 12 and 15 lipoxygenase (LO) mRNA and produce 12- and 15-hydroxyeicosatetraenoic acid (H). 12LO expression is higher and 15LO is lower in prOb, while 12H is higher in prOb and 15H is similar in both. JKF inhibited 12LO expression in prOb and stimulated in poOb, whereas PTH stimulated it to higher extent in prOb. JKF stimulated and PTH inhibited 15LO expression in both; 12 and 15H were stimulated by both hormones in both Ob. 5. PTH and JKF stimulated DNA and CK in both Ob. In conclusion Ob demonstrate some age-dependent response to calciotrophic hormones, but the mechanism and beneficial outcome for human is unclear.
Collapse
Affiliation(s)
- D Somjen
- Institute of Endocrinology, Metabolism and Hypertension, Tel-Aviv Sourasky Medical Centre and The Sackler Faculty of Medicine Tel-Aviv University, Tel-Aviv 64239, Israel.
| | | | | | | |
Collapse
|
19
|
Tyagi AM, Srivastava K, Kureel J, Kumar A, Raghuvanshi A, Yadav D, Maurya R, Goel A, Singh D. Premature T cell senescence in Ovx mice is inhibited by repletion of estrogen and medicarpin: a possible mechanism for alleviating bone loss. Osteoporos Int 2012; 23:1151-61. [PMID: 21562872 DOI: 10.1007/s00198-011-1650-x] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2011] [Accepted: 03/10/2011] [Indexed: 01/01/2023]
Abstract
UNLABELLED Presently the relationship between CD28, biological marker of senescence, and ovariectomy is not well understood. We show that ovariectomy leads to CD28 loss on T cells and estrogen (E2) repletion and medicarpin (Med) inhibits this effect. We thus propose that Med/E2 prevents bone loss by delaying premature T cell senescence. INTRODUCTION Estrogen deficiency triggers reproductive aging by accelerating the amplification of TNF-α-producing T cells, thereby leading to bone loss. To date, no study has been carried out to explain the relationship between CD4(+)CD28null T cells and ovariectomy or osteoporosis. We aim to determine the effect of Ovx on CD28 expression on T cells and effects of E2 and medicarpin (a pterocarpan phytoalexin) with proven osteoprotective effect on altered T cell responses. METHODS Adult, female Balb/c mice were taken for the study. The groups were: sham, Ovx, Ovx + Med or E2. Treatments were given daily by oral gavage. At autopsy bone marrow and spleen were flushed out and cells labelled with antibodies for FACS analysis. Serum was collected for ELISA. RESULTS In Ovx mice, Med/E2 at their respective osteoprotective doses resulted in thymus involution and lowered Ovx-induced increase in serum TNF-α level and its mRNA levels in the BM T cells. Med/E2 reduced BM and spleen CD4(+) T cell proliferation and prevented CD28 loss on CD4(+) T cells. Further, Med abrogated TNF-α-induced loss of CD28 expression in the BM T cells. CONCLUSIONS To our knowledge this is the first report to determine the mechanism of CD28 loss on T cells as a result of ovariectomy. Our study demonstrates that Ovx leads to the generation of premature senescent CD4(+)CD28null T cells, an effect inhibited by E2 and Med. We propose that one of the mechanisms by which Med/E2 alleviates Ovx-induced bone loss is by delaying T cell senescence and enhancing CD28 expression.
Collapse
Affiliation(s)
- A M Tyagi
- Division of Endocrinology, Central Drug Research Institute, Council of Scientific and Industrial Research, Chattar Manzil, PO Box 173, Lucknow, India
| | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Tamoxifen effects on respiratory chain complexes and creatine kinase activities in an animal model of mania. Pharmacol Biochem Behav 2011; 98:304-10. [DOI: 10.1016/j.pbb.2011.01.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2010] [Revised: 12/27/2010] [Accepted: 01/23/2011] [Indexed: 12/27/2022]
|