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Rahmani D, Faal B, Zali H, Tackallou SH, Niknam Z. The beneficial effects of simultaneous supplementation of Lactobacillus reuteri and calcium fluoride nanoparticles on ovariectomy-induced osteoporosis. BMC Complement Med Ther 2023; 23:340. [PMID: 37752485 PMCID: PMC10521537 DOI: 10.1186/s12906-023-04167-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Accepted: 09/12/2023] [Indexed: 09/28/2023] Open
Abstract
BACKGROUND The development of new strategies to inhibit and/or treat osteoporosis as a chronic systemic disease is one of the most crucial topics. The present study aimed to investigate the simultaneous effects of calcium fluoride nanoparticles (CaF2 NPs) and lactobacillus reuteri ATCC PTA 6475 (L. reuteri) against osteoporosis in an ovariectomized rat model (OVX). METHODS In this study, 18 matured Wistar female rats were randomly assigned into 6 groups, including control, OVX, sham, OVX + L. reuteri, OVX + CaF2 NPs, and OVX + L. reuteri + CaF2 NPs. We used OVX rats to simulate post-menopausal osteoporosis, and the treatments were begun two weeks before OVX and continued for four weeks. All groups' blood samples were collected, and serum biomarkers (estrogen, calcium, vitamin D3, and alkaline phosphatase (ALP)) were measured. The tibia and Femur lengths of all groups were measured. Histopathological slides of tibia, kidney, and liver tissues were analyzed using the Hematoxylin and Eosin staining method. RESULTS Our results revealed that dietary supplementation of L. reuteri and CaF2 NPs in low doses for 6 weeks did not show adverse effects in kidney and liver tissues. The tibial and femoral lengths of OVX rats as well as the population of osteoblasts and osteocytes and newly generated osteoid in the tibia remarkably increased in the combination therapy group. Moreover, there was a significant increase in serum estrogen levels and a significant decrease in serum calcium and alkaline phosphatase levels in combination treatment groups compared to the OVX groups not receiving the diet. CONCLUSIONS Our results suggest the favorable effects of the simultaneous supplementation of L. reuteri and CaF2 NP to reduce post-menopausal bone loss.
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Affiliation(s)
- Dibachehr Rahmani
- Department of Biology, Central Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Bahareh Faal
- Department of Biology, Central Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Hakimeh Zali
- Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | - Zahra Niknam
- Neurophysiology Research Center, Cellular and Molecular Medicine research Institute, Urmia University of Medical Sciences, Urmia, Iran.
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2
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Wank I, Niedermair T, Kronenberg D, Stange R, Brochhausen C, Hess A, Grässel S. Influence of the Peripheral Nervous System on Murine Osteoporotic Fracture Healing and Fracture-Induced Hyperalgesia. Int J Mol Sci 2022; 24:ijms24010510. [PMID: 36613952 PMCID: PMC9820334 DOI: 10.3390/ijms24010510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 12/16/2022] [Accepted: 12/20/2022] [Indexed: 12/29/2022] Open
Abstract
Osteoporotic fractures are often linked to persisting chronic pain and poor healing outcomes. Substance P (SP), α-calcitonin gene-related peptide (α-CGRP) and sympathetic neurotransmitters are involved in bone remodeling after trauma and nociceptive processes, e.g., fracture-induced hyperalgesia. We aimed to link sensory and sympathetic signaling to fracture healing and fracture-induced hyperalgesia under osteoporotic conditions. Externally stabilized femoral fractures were set 28 days after OVX in wild type (WT), α-CGRP- deficient (α-CGRP -/-), SP-deficient (Tac1-/-) and sympathectomized (SYX) mice. Functional MRI (fMRI) was performed two days before and five and 21 days post fracture, followed by µCT and biomechanical tests. Sympathectomy affected structural bone properties in the fracture callus whereas loss of sensory neurotransmitters affected trabecular structures in contralateral, non-fractured bones. Biomechanical properties were mostly similar in all groups. Both nociceptive and resting-state (RS) fMRI revealed significant baseline differences in functional connectivity (FC) between WT and neurotransmitter-deficient mice. The fracture-induced hyperalgesia modulated central nociception and had robust impact on RS FC in all groups. The changes demonstrated in RS FC in fMRI might potentially be used as a bone traumata-induced biomarker regarding fracture healing under pathophysiological musculoskeletal conditions. The findings are of clinical importance and relevance as they advance our understanding of pain during osteoporotic fracture healing and provide a potential imaging biomarker for fracture-related hyperalgesia and its temporal development. Overall, this may help to reduce the development of chronic pain after fracture thereby improving the treatment of osteoporotic fractures.
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Affiliation(s)
- Isabel Wank
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany
| | - Tanja Niedermair
- Institute of Pathology, University of Regensburg, 93053 Regensburg, Germany
| | - Daniel Kronenberg
- Department of Regenerative Musculoskeletal Medicine, Institute of Musculoskeletal Medicine (IMM), University Hospital Münster, 48149 Münster, Germany
| | - Richard Stange
- Department of Regenerative Musculoskeletal Medicine, Institute of Musculoskeletal Medicine (IMM), University Hospital Münster, 48149 Münster, Germany
| | | | - Andreas Hess
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany
| | - Susanne Grässel
- Centre for Medical Biotechnology (ZMB), Department of Orthopedic Surgery, Experimental Orthopedics, University of Regensburg, 93053 Regensburg, Germany
- Correspondence: ; Tel.: +49-941-943-5065
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3
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Jdidi H, Ghorbel Koubaa F, Aoiadni N, Elleuch A, Makni-Ayadi F, El Feki A. Effect of Medicago sativa compared To 17β-oestradiol on osteoporosis in ovariectomized mice. Arch Physiol Biochem 2022; 128:951-958. [PMID: 32193946 DOI: 10.1080/13813455.2020.1741644] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Phytoestrogens, with a wide range of beneficial effects, prevent bone loss caused by oestrogen deficiency.The purpose of this study was to evaluate the effect of Medicago sativa ethanol extract compared to 17β-oestradiol on osteoporosis in ovariectomized mice.The study was carried out on female mice, divided into five groups: control mice (GI), Medicago sativa treated mice (0.75 g/kg BW/day) (GII), ovariectomized mice (GIII) and ovariectomized mice treated either with Medicago sativa (GIV) or with 17β-oestradiol (50 µg/Kg BW/day) (GV).Our results showed that Medicago sativa or 17β-oestradiol treatments significantly attenuated perturbations of mineral levels, histological changes and oxidative stress in the femurs of ovariectomized mice.Medicago sativa prevented bone loss induced by oestrogen deficiency, which could be attributed to its richness in kaempferol, syringic acid, naringenin and myrictin. Its effects were more beneficial or similar compared to 17β-oestradiol.
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Affiliation(s)
- Hajer Jdidi
- Laboratory of Animal Ecophysiology Faculty of Sciences of Sfax, Sfax University, Sfax, Tunisia
| | - Fatma Ghorbel Koubaa
- Laboratory of Animal Ecophysiology Faculty of Sciences of Sfax, Sfax University, Sfax, Tunisia
| | - Nissaf Aoiadni
- Laboratory of Animal Ecophysiology Faculty of Sciences of Sfax, Sfax University, Sfax, Tunisia
| | - Aida Elleuch
- Biochemistry Laboratory, CHU H. Bourguiba, Sfax, Tunisia
| | | | - Abdelfattah El Feki
- Laboratory of Animal Ecophysiology Faculty of Sciences of Sfax, Sfax University, Sfax, Tunisia
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4
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Ouyang Z, Kang D, Li K, Liang G, Liu Z, Mai Q, Chen Q, Yao C, Wei R, Tan X, Bai X, Huang B, Li Q. DEPTOR exacerbates bone-fat imbalance in osteoporosis by transcriptionally modulating BMSC differentiation. Biomed Pharmacother 2022; 151:113164. [PMID: 35609371 DOI: 10.1016/j.biopha.2022.113164] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Revised: 05/17/2022] [Accepted: 05/17/2022] [Indexed: 11/28/2022] Open
Abstract
Bone marrow-derived mesenchymal stem cells (BMSCs) tend to differentiate into adipocytes rather than osteoblasts in osteoporosis and other pathological conditions. Understanding the mechanisms underlying the adipo-osteogenic imbalance greatly contributes to the ability to induce specific MSC differentiation for clinical applications. This study aimed to explore whether DEP-domain containing mTOR-interacting protein (DEPTOR) regulated MSC fate and bone-fat switch, which was indicated to be a key player in bone homeostasis. We found that DEPTOR expression decreased during the osteogenesis of BMSCs but increased during adipogenesis and the shift of cell lineage commitment of BMSCs to adipocytes in mice with osteoporosis. DEPTOR facilitated adipogenic differentiation while preventing the osteogenic differentiation of BMSCs. Deptor ablation in BMSCs alleviated bone loss and reduced marrow fat accumulation in mice with osteoporosis. Mechanistically, DEPTOR binds transcriptional coactivator with a PDZ-binding motif (TAZ) and inhibits its transactivation properties, thereby repressing the transcriptional activity of RUNX2 and elevating gene transcription by peroxisome-proliferator-activated receptor-gamma. TAZ knockdown in BMSCs abolished the beneficial role of Deptor ablation in bone-fat balance in mice. Together, our data indicate that DEPTOR is a molecular rheostat that modulates BMSC differentiation and bone-fat balance, and may represent a potential therapeutic target for age-related bone loss.
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Affiliation(s)
- Zhicong Ouyang
- Academy of Orthopedics, Guangdong Province, Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Department of Orthopedics, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, China
| | - Dawei Kang
- Academy of Orthopedics, Guangdong Province, Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Department of Orthopedics, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, China; Department of Orthopedics, Dazhou Second People's Hospital of Sichuan Province, Dazhou 635000, China
| | - Kai Li
- Academy of Orthopedics, Guangdong Province, Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Department of Orthopedics, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, China
| | - Guojun Liang
- Department of Orthopedics, Guangzhou Huaxin Orthopaedic Hospital of Shantou University, Guangzhou 510507, China
| | - Zezheng Liu
- Academy of Orthopedics, Guangdong Province, Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Department of Orthopedics, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, China
| | - Qiguang Mai
- Academy of Orthopedics, Guangdong Province, Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Department of Orthopedics, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, China
| | - Qingjing Chen
- Academy of Orthopedics, Guangdong Province, Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Department of Orthopedics, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, China
| | - Chenfeng Yao
- Academy of Orthopedics, Guangdong Province, Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Department of Orthopedics, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, China
| | - Ruiming Wei
- Academy of Orthopedics, Guangdong Province, Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Department of Orthopedics, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, China
| | - Xianchun Tan
- Department of Orthopedics, Dazhou Second People's Hospital of Sichuan Province, Dazhou 635000, China
| | - Xiaochun Bai
- Department of Cell Biology, School of Basic Medical Science, Southern Medical University, Guangzhou 510515, China
| | - Bin Huang
- Academy of Orthopedics, Guangdong Province, Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Department of Orthopedics, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, China.
| | - Qingchu Li
- Academy of Orthopedics, Guangdong Province, Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Department of Orthopedics, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, China.
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5
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Boer GA, Hunt JE, Gabe MBN, Windeløv JA, Sparre-Ulrich AH, Hartmann B, Holst JJ, Rosenkilde MM. GIP receptor antagonist treatment causes a reduction in weight gain in ovariectomised high fat diet-fed mice. Br J Pharmacol 2022; 179:4486-4499. [PMID: 35710141 PMCID: PMC9544171 DOI: 10.1111/bph.15894] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 04/04/2022] [Accepted: 05/17/2022] [Indexed: 11/29/2022] Open
Abstract
Background and purpose The incretin hormone, gastric inhibitory peptide/glucose‐dependent insulinotropic polypeptide (GIP), secreted by the enteroendocrine K‐cells in the proximal intestine, may regulate lipid metabolism and adiposity, but its exact role in these processes is unclear. Experimental approach We characterized in vitro and in vivo antagonistic properties of a novel GIP analogue, mGIPAnt‐1. We further assessed the in vivo pharmacokinetic profile of this antagonist, as well as its ability to affect high‐fat diet (HFD)‐induced body weight gain in ovariectomised mice during an 8‐week treatment period. Key results mGIPAnt‐1 showed competitive antagonistic properties to the GIP receptor in vitro as it inhibited GIP‐induced cAMP accumulation in COS‐7 cells. Furthermore, mGIPAnt‐1 was capable of inhibiting GIP‐induced glucoregulatory and insulinotropic effects in vivo and has a favourable pharmacokinetic profile with a half‐life of 7.2 h in C57Bl6 female mice. Finally, sub‐chronic treatment with mGIPAnt‐1 in ovariectomised HFD mice resulted in a reduction of body weight and fat mass. Conclusion and Implications mGIPAnt‐1 successfully inhibited acute GIP‐induced effects in vitro and in vivo and sub‐chronically induces resistance to HFD‐induced weight gain in ovariectomised mice. Our results support the development of GIP antagonists for the therapy of obesity.
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Affiliation(s)
- Geke Aline Boer
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.,Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Jenna Elizabeth Hunt
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.,Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Maria Buur Nordskov Gabe
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Johanne Agerlin Windeløv
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.,Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | | | - Bolette Hartmann
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.,Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Jens Juul Holst
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.,Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Mette Marie Rosenkilde
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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6
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Lin YY, Takemoto JY, Chang CWT, Peng CA. Mesobiliverdin IXα ameliorates osteoporosis via promoting osteogenic differentiation of mesenchymal stem cells. Biochem Biophys Res Commun 2022; 619:56-61. [PMID: 35738065 DOI: 10.1016/j.bbrc.2022.06.042] [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: 05/24/2022] [Revised: 06/10/2022] [Accepted: 06/14/2022] [Indexed: 11/16/2022]
Abstract
Heme oxygenase-1 (HO-1) expression promotes osteogenesis, but the mechanisms remain unclear and therapeutic strategies using it to target bone disorders such as osteoporosis have not progressed. Mesobiliverdin IXα is a naturally occurring bilin analog of HO-1 catalytic product biliverdin IXα. Inclusion of mesobiliverdin IXα in the feed diet of ovariectomized osteoporotic mice was observed to increase femur bone volume, trabecular thickness and osteogenesis serum markers osteoprotegrin and osteocalcin and to decrease bone resorption serum markers cross-linked N-teleopeptide and tartrate-resistant acid phosphatase 5b. Moreover, in vitro exposure of human bone marrow mesenchymal stem cells to mesobiliverdin IXα enhanced osteogenic differentiation efficiency by two-fold over non-exposed controls. Our results imply that mesobiliverdin IXα promotes osteogenesis in ways that reflect the potential therapeutic effects of induced HO-1 expression in alleviating osteoporosis.
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Affiliation(s)
- Yuan-Yu Lin
- Department of Animal Science and Technology, National Taiwan University, Taipei City, Taiwan
| | - Jon Y Takemoto
- Department of Biology, Utah State University, Logan, UT, United States
| | - Cheng-Wei T Chang
- Department of Chemistry and Biochemistry, Utah State University, Logan, UT, United States
| | - Ching-An Peng
- Department of Chemical and Biological Engineering, University of Idaho, Moscow, ID, United States.
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7
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Arioka M, Dawid IM, Cuevas PL, Coyac BR, Leahy B, Wang L, Yuan X, Li Z, Zhang X, Liu B, Helms JA. Accelerating Socket Repair via WNT3A Curtails Alveolar Ridge Resorption. J Dent Res 2021; 101:102-110. [PMID: 34157887 DOI: 10.1177/00220345211019922] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Tooth extraction triggers alveolar ridge resorption, and when this resorption is extensive, it can complicate subsequent reconstructive procedures that use dental implants. Clinical data demonstrate that the most significant dimensional changes in the ridge occur soon after tooth extraction. Here, we sought to understand whether a correlation existed between the rate at which an extraction socket heals and the extent of alveolar ridge resorption. Maxillary molars were extracted from young and osteoporotic rodents, and quantitative micro-computed tomographic imaging, histology, and immunohistochemistry were used to simultaneously follow socket repair and alveolar ridge resorption. Extraction sockets rapidly filled with new bone via the proliferation and differentiation of Wnt-responsive osteoprogenitor cells and their progeny. At the same time that new bone was being deposited in the socket, tartrate-resistant acid phosphatase-expressing osteoclasts were resorbing the ridge. Significantly faster socket repair in young animals was associated with significantly more Wnt-responsive osteoprogenitor cells and their progeny as compared with osteoporotic animals. Delivery of WNT3A to the extraction sockets of osteoporotic animals restored the number of Wnt-responsive cells and their progeny back to levels seen in young healthy animals and accelerated socket repair in osteoporotic animals back to rates seen in the young. In cases where the extraction socket was treated with WNT3A, alveolar ridge resorption was significantly reduced. These data demonstrate a causal link between enhancing socket repair via WNT3A and preserving alveolar ridge dimensions following tooth extraction.
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Affiliation(s)
- M Arioka
- Division of Plastic and Reconstructive Surgery, Department of Surgery, School of Medicine, Stanford University, Stanford, CA, USA.,Department of Clinical Pharmacology, Faculty of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - I M Dawid
- Division of Plastic and Reconstructive Surgery, Department of Surgery, School of Medicine, Stanford University, Stanford, CA, USA
| | - P L Cuevas
- Division of Plastic and Reconstructive Surgery, Department of Surgery, School of Medicine, Stanford University, Stanford, CA, USA
| | - B R Coyac
- Division of Plastic and Reconstructive Surgery, Department of Surgery, School of Medicine, Stanford University, Stanford, CA, USA
| | - B Leahy
- Division of Plastic and Reconstructive Surgery, Department of Surgery, School of Medicine, Stanford University, Stanford, CA, USA
| | - L Wang
- Division of Plastic and Reconstructive Surgery, Department of Surgery, School of Medicine, Stanford University, Stanford, CA, USA.,State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - X Yuan
- Division of Plastic and Reconstructive Surgery, Department of Surgery, School of Medicine, Stanford University, Stanford, CA, USA
| | - Z Li
- Division of Plastic and Reconstructive Surgery, Department of Surgery, School of Medicine, Stanford University, Stanford, CA, USA.,Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China
| | - X Zhang
- Division of Plastic and Reconstructive Surgery, Department of Surgery, School of Medicine, Stanford University, Stanford, CA, USA.,State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - B Liu
- Ankasa Regenerative Therapeutics, South San Francisco, CA, USA
| | - J A Helms
- Division of Plastic and Reconstructive Surgery, Department of Surgery, School of Medicine, Stanford University, Stanford, CA, USA
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8
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Impact of the Sensory and Sympathetic Nervous System on Fracture Healing in Ovariectomized Mice. Int J Mol Sci 2020; 21:ijms21020405. [PMID: 31936403 PMCID: PMC7013559 DOI: 10.3390/ijms21020405] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 12/23/2019] [Accepted: 12/31/2019] [Indexed: 12/24/2022] Open
Abstract
The peripheral nervous system modulates bone repair under physiological and pathophysiological conditions. Previously, we reported an essential role for sensory neuropeptide substance P (SP) and sympathetic nerve fibers (SNF) for proper fracture healing and bone structure in a murine tibial fracture model. A similar distortion of bone microarchitecture has been described for mice lacking the sensory neuropeptide α-calcitonin gene-related peptide (α-CGRP). Here, we hypothesize that loss of SP, α-CGRP, and SNF modulates inflammatory and pain-related processes and also affects bone regeneration during fracture healing under postmenopausal conditions. Intramedullary fixed femoral fractures were set to 28 days after bilateral ovariectomy (OVX) in female wild type (WT), SP-, α-CGRP-deficient, and sympathectomized (SYX) mice. Locomotion, paw withdrawal threshold, fracture callus maturation and numbers of TRAP-, CD4-, CD8-, F4/80-, iNos-, and Arg1-positive cells within the callus were analyzed. Nightly locomotion was reduced in unfractured SP-deficient and SYX mice after fracture. Resistance to pressure was increased for the fractured leg in SP-deficient mice during the later stages of fracture healing, but was decreased in α-CGRP-deficient mice. Hypertrophic cartilage area was increased nine days after fracture in SP-deficient mice. Bony callus maturation was delayed in SYX mice during the later healing stages. In addition, the number of CD 4-positive cells was reduced after five days and the number of CD 8-positive cells was additionally reduced after 21 days in SYX mice. The number of Arg1-positive M2 macrophages was higher in α-CGRP-deficient mice five days after fracture. The alkaline phosphatase level was increased in SYX mice 16 days after fracture. Absence of α-CGRP appears to promote M2 macrophage polarization and reduces the pain threshold, but has no effect on callus tissue maturation. Absence of SP reduces locomotion, increases the pain-threshold, and accelerates hypertrophic callus tissue remodeling. Destruction of SNF reduces locomotion after fracture and influences bony callus tissue remodeling during the later stages of fracture repair, whereas pain-related processes are not affected.
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9
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Vargas‐Muñoz VM, Martínez‐Martínez A, Muñoz‐Islas E, Ramírez‐Rosas MB, Acosta‐González RI, Jiménez‐Andrade JM. Chronic administration of Cl‐amidine, a pan‐peptidylarginine deiminase inhibitor, does not reverse bone loss in two different murine models of osteoporosis. Drug Dev Res 2019; 81:93-101. [DOI: 10.1002/ddr.21608] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 09/24/2019] [Accepted: 09/26/2019] [Indexed: 12/11/2022]
Affiliation(s)
- Virginia M. Vargas‐Muñoz
- Unidad Académica Multidisciplinaria Reynosa‐Aztlán, Universidad Autónoma de Tamaulipas Reynosa Tamaulipas Mexico
| | - Arisai Martínez‐Martínez
- Unidad Académica Multidisciplinaria Reynosa‐Aztlán, Universidad Autónoma de Tamaulipas Reynosa Tamaulipas Mexico
| | - Enriqueta Muñoz‐Islas
- Unidad Académica Multidisciplinaria Reynosa‐Aztlán, Universidad Autónoma de Tamaulipas Reynosa Tamaulipas Mexico
| | - Martha B. Ramírez‐Rosas
- Unidad Académica Multidisciplinaria Reynosa‐Aztlán, Universidad Autónoma de Tamaulipas Reynosa Tamaulipas Mexico
| | - Rosa I. Acosta‐González
- Unidad Académica Multidisciplinaria Reynosa‐Aztlán, Universidad Autónoma de Tamaulipas Reynosa Tamaulipas Mexico
| | - Juan M. Jiménez‐Andrade
- Unidad Académica Multidisciplinaria Reynosa‐Aztlán, Universidad Autónoma de Tamaulipas Reynosa Tamaulipas Mexico
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10
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Aeimlapa R, Wongdee K, Tiyasatkulkovit W, Kengkoom K, Krishnamra N, Charoenphandhu N. Anomalous bone changes in ovariectomized type 2 diabetic rats: inappropriately low bone turnover with bone loss in an estrogen-deficient condition. Am J Physiol Endocrinol Metab 2019; 317:E646-E657. [PMID: 31361547 DOI: 10.1152/ajpendo.00093.2019] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Estrogen deprivation accelerates bone resorption, leading to imbalance of bone remodeling and osteoporosis in postmenopausal women. In the elderly, type 2 diabetes mellitus (T2DM) frequently coexists as an independent factor of bone loss. However, little is known about the skeletal changes in a combined condition of estrogen deficiency and T2DM. Herein, we performed ovariectomy (OVX) in nonobese Goto-Kakizaki (GK) T2DM rats to examine changes associated with calcium and phosphate metabolism and bone microstructures and strength. As expected, wild-type (WT) rats subjected to ovariectomy (OVX-WT) had low trabecular bone volume and serum calcium with increased dynamic histomorphometric and serum bone markers, consistent with the high turnover state. T2DM in GK rats also led to low trabecular volume and serum calcium. However, the dynamic histomorphometric markers of bone remodeling were unaffected in these GK rats, indicating the distinct mechanism of T2DM-induced bone loss. Interestingly, OVX-GK rats were found to have anomalous and unique changes in bone turnover-related parameters, i.e., decreased osteoblast and osteoclast surfaces with lower COOH-terminal telopeptide of type I collagen levels compared with OVX-WT rats. Furthermore, the levels of calciotropic hormones, i.e., parathyroid hormone and 1,25(OH)2D3, were significantly decreased in OVX-GK rats. Although the OVX-induced bone loss did not further worsen in GK rats, a three-point bending test indicated that OVX-GK bones exhibited a decrease in bone elasticity. In conclusion, T2DM and estrogen deficiency both led to microstructural bone loss, the appearance of which did not differ from each factor alone. Nevertheless, the combination worsened the integrity and suppressed the turnover, which might eventually result in adynamic bone disease.
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Affiliation(s)
- Ratchaneevan Aeimlapa
- Center of Calcium and Bone Research, Faculty of Science, Mahidol University, Bangkok, Thailand
- Department of Physiology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Kannikar Wongdee
- Center of Calcium and Bone Research, Faculty of Science, Mahidol University, Bangkok, Thailand
- Faculty of Allied Health Sciences, Burapha University, Chonburi, Thailand
| | - Wacharaporn Tiyasatkulkovit
- Center of Calcium and Bone Research, Faculty of Science, Mahidol University, Bangkok, Thailand
- Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Kanchana Kengkoom
- National Laboratory Animal Center, Mahidol University, Nakhon Pathom, Thailand
| | - Nateetip Krishnamra
- Center of Calcium and Bone Research, Faculty of Science, Mahidol University, Bangkok, Thailand
- Department of Physiology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Narattaphol Charoenphandhu
- Center of Calcium and Bone Research, Faculty of Science, Mahidol University, Bangkok, Thailand
- Department of Physiology, Faculty of Science, Mahidol University, Bangkok, Thailand
- Institute of Molecular Biosciences, Mahidol University, Nakhon Pathom, Thailand
- The Academy of Science, The Royal Society of Thailand, Bangkok, Thailand
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11
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Liu Y, Li Z, Arioka M, Wang L, Bao C, Helms JA. WNT3A accelerates delayed alveolar bone repair in ovariectomized mice. Osteoporos Int 2019; 30:1873-1885. [PMID: 31338519 PMCID: PMC7007703 DOI: 10.1007/s00198-019-05071-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Accepted: 06/24/2019] [Indexed: 02/07/2023]
Abstract
Our goal was to evaluate alveolar bone healing in OVX mice, and to assess the functional utility of a WNT-based treatment to accelerate healing in mice with an osteoporotic-like bony phenotype. INTRODUCTION Is osteoporosis a risk factor for dental procedures? This relatively simple question is exceedingly difficult to answer in a clinical setting, for two reasons. First, as an age-related disease, osteoporosis is frequently accompanied by age-related co-morbidities that can contribute to slower tissue repair. Second, the intervals at which alveolar bone repair are assessed in a clinical study are often measured in months to years. This study aimed to evaluate alveolar bone repair in ovariectomized (OVX) mice and provide preclinical evidence to support a WNT-based treatment to accelerate alveolar bone formation. METHODS OVX was performed in young mice to produce an osteoporotic-like bone phenotype. Thereafter, the rate of extraction socket healing and osteotomy repair was assessed. A liposomal WNT3A treatment was tested for its ability to promote alveolar bone formation in this OVX-induced model of bone loss. RESULTS Bone loss was observed throughout the murine skeleton, including the maxilla, and mirrored the pattern of bone loss observed in aged mice. Injuries to the alveolar bone, including tooth extraction and osteotomy site preparation, both healed significantly slower than the same injuries produced in young controls. Given sufficient time, however, all injuries eventually healed. In OVX mice, osteotomies healed significantly faster if they were treated with L-WNT3A. CONCLUSIONS Alveolar bone injuries heal slower in OVX mice that exhibit an osteoporotic-like phenotype. The rate of alveolar bone repair in OVX mice can be significantly promoted with local delivery of L-WNT3A.
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Affiliation(s)
- Y Liu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, 14 Third Section, Renmin Nan Road, Chengdu, 610041, China
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, 1651 Page Mill Road, Palo Alto, CA, 94304, USA
| | - Z Li
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, 1651 Page Mill Road, Palo Alto, CA, 94304, USA
- Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, 300052, China
| | - M Arioka
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, 1651 Page Mill Road, Palo Alto, CA, 94304, USA
- Department of Clinical Pharmacology, Faculty of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| | - L Wang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, 14 Third Section, Renmin Nan Road, Chengdu, 610041, China
| | - C Bao
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, 14 Third Section, Renmin Nan Road, Chengdu, 610041, China
| | - J A Helms
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, 1651 Page Mill Road, Palo Alto, CA, 94304, USA.
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12
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Shih YRV, Liu M, Kwon SK, Iida M, Gong Y, Sangaj N, Varghese S. Dysregulation of ectonucleotidase-mediated extracellular adenosine during postmenopausal bone loss. SCIENCE ADVANCES 2019; 5:eaax1387. [PMID: 31457100 PMCID: PMC6703860 DOI: 10.1126/sciadv.aax1387] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Accepted: 07/12/2019] [Indexed: 05/25/2023]
Abstract
Adenosine and its receptors play a key role in bone homeostasis and regeneration. Extracellular adenosine is generated from CD39 and CD73 activity in the cell membrane, through conversion of adenosine triphosphate to adenosine monophosphate (AMP) and AMP to adenosine, respectively. Despite the relevance of CD39/CD73 to bone health, the roles of these enzymes in bona fide skeletal disorders remain unknown. We demonstrate that CD39/CD73 expression and extracellular adenosine levels in the bone marrow are substantially decreased in animals with osteoporotic bone loss. Knockdown of estrogen receptors ESR1 and ESR2 in primary osteoprogenitors and osteoclasts undergoing differentiation showed decreased coexpression of membrane-bound CD39 and CD73 and lower extracellular adenosine. Targeting the adenosine A2B receptor using an agonist attenuated bone loss in ovariectomized mice. Together, these findings suggest a pathological association of purine metabolism with estrogen deficiency and highlight the potential of A2B receptor as a target to treat osteoporosis.
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Affiliation(s)
- Yu-Ru V. Shih
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC 27710, USA
| | - Mengqian Liu
- Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA
| | - Seong Keun Kwon
- Department of Otorhinolaryngology–Head and Neck Surgery, Seoul National University Hospital, Seoul 03080, Republic of Korea
| | | | - Ya Gong
- Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA
| | - Nivedita Sangaj
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC 27710, USA
| | - Shyni Varghese
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC 27710, USA
- Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
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13
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Arioka M, Zhang X, Li Z, Tulu US, Liu Y, Wang L, Yuan X, Helms JA. Osteoporotic Changes in the Periodontium Impair Alveolar Bone Healing. J Dent Res 2019; 98:450-458. [PMID: 30626268 DOI: 10.1177/0022034518818456] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Osteoporosis is associated with decreased bone density and increased bone fragility, but how this disease affects alveolar bone healing is not clear. The objective of this study was to determine the extent to which osteoporosis affects the jaw skeleton and then to evaluate possible mechanisms whereby an osteoporotic phenotype might affect the rate of alveolar bone healing following tooth extraction. Using an ovariectomized mouse model coupled with micro-computed tomographic imaging, histologic, molecular, and cellular assays, we first demonstrated that the appendicular and jaw skeletons both develop osteoporotic phenotypes. Next, we demonstrated that osteoporotic mice exhibit atrophy of the periodontal ligament (PDL) and that this atrophy was accompanied by a reduction in the pool of osteoprogenitor cells in the PDL. The paucity of PDL-derived osteoprogenitor cells in osteoporotic mice was associated with significantly slower extraction socket healing. Collectively, these analyses demonstrate that the jaw skeleton is susceptible to the untoward effects of osteoporosis that manifest as thinner, more porous alveolar bone, PDL thinning, and slower bone repair. These findings have potential clinical significance for older osteopenic patients undergoing reconstructive procedures.
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Affiliation(s)
- M Arioka
- 1 Division of Plastic and Reconstructive Surgery, Department of Surgery, School of Medicine, Stanford University, Stanford, CA, USA.,2 Department of Clinical Pharmacology, Faculty of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - X Zhang
- 1 Division of Plastic and Reconstructive Surgery, Department of Surgery, School of Medicine, Stanford University, Stanford, CA, USA.,3 State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Z Li
- 1 Division of Plastic and Reconstructive Surgery, Department of Surgery, School of Medicine, Stanford University, Stanford, CA, USA.,4 Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, China
| | - U S Tulu
- 1 Division of Plastic and Reconstructive Surgery, Department of Surgery, School of Medicine, Stanford University, Stanford, CA, USA
| | - Y Liu
- 1 Division of Plastic and Reconstructive Surgery, Department of Surgery, School of Medicine, Stanford University, Stanford, CA, USA.,3 State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - L Wang
- 3 State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - X Yuan
- 1 Division of Plastic and Reconstructive Surgery, Department of Surgery, School of Medicine, Stanford University, Stanford, CA, USA
| | - J A Helms
- 1 Division of Plastic and Reconstructive Surgery, Department of Surgery, School of Medicine, Stanford University, Stanford, CA, USA
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Dimethylthiourea ameliorates carbon tetrachloride-induced acute liver injury in ovariectomized mice. Biomed Pharmacother 2018; 104:427-436. [PMID: 29787990 DOI: 10.1016/j.biopha.2018.05.065] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 04/24/2018] [Accepted: 05/14/2018] [Indexed: 12/11/2022] Open
Abstract
AIMS In order to clarify hepato-protective actions of estrogen, we examined the progress of carbon tetrachloride (CCl4)-induced acute liver injury (ALI) in sham and ovariectomized (ovx) mice and the effects of dimethylthiourea (DMTU), a hydroxyl radical scavenger, and meloxicam (Melo), a selective cox-2 inhibitor, on the development of CCl4-induced ALI. MAIN METHODS Female C57BL/6 J mice weighing 15-20 g were performed sham or ovx operation at 8 weeks of age. Blood and liver samples were collected 15 and 24 h after CCl4 administration. Sham and ovx mice were given DMTU, Melo or saline intraperitoneally 30 min before CCl4 or corn oil administration. KEY FINDINGS ALT levels in ovx mice were significantly increased compared to those in sham mice. DMTU reduced ALT levels in ovx mice to the same levels as those in sham mice after CCl4 injection. CCl4 upregulated TNF-α, IL-6, cox-2 and iNOS expression in ovx mice compared to the levels in sham mice. DMTU significantly reduced cox-2 and iNOS expression levels upregulated by CCl4 in ovx mice. However, pretreatment with Melo had no effects on ALT levels and the gene expression levels of TNF-α, IL-6 and HO-1 in either sham or ovx mice, indicating that cox-2 may not participate in increase of CCl4-induced ALI caused by estrogen deficiency. SIGNIFICANCE Ovariectomy accelerated the development of CCl4-induced acute liver injury, and DMTU reduced liver injury. These results suggest that estrogen may act as an antioxidant in the development CCl4-induced acute liver injury.
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15
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Azuma K, Zhou Q, Kubo KY. Morphological and molecular characterization of the senile osteoporosis in senescence-accelerated mouse prone 6 (SAMP6). Med Mol Morphol 2018; 51:139-146. [PMID: 29619545 DOI: 10.1007/s00795-018-0188-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Accepted: 03/31/2018] [Indexed: 12/16/2022]
Abstract
Although the understanding of the complex pathogenesis for osteoporosis is appreciable, the underlying mechanism is not yet fully elucidated. There is a great need to further characterize the available animal models in osteoporosis research. The senescence-accelerated mouse prone 6 (SAMP6) mice have been developed as the spontaneous experimental model for senile osteoporosis. Here, we provide a comprehensive overview of current research regarding the bone morphological and molecular alterations and the possible mechanisms involved in these changes. There were significant decrease in trabecular bone mass at the axial and appendicular skeletal sites, with no marked alterations of cortical bone. Decreased bone formation on the endosteal surface and trabecular bone, and increased bone marrow adiposity were observed in SAMP6 mice. The elevated expression level of proliferator activator gamma (PPARγ) in the bone marrow suggest that PPARγ might regulate osteoblastic bone formation negatively in SAMP6 mice. The expression level of secreted frizzled-related protein 4 (Sfrp4) was found to be higher in SAMP6 mice. Sfrp4 is considered to suppress osteoblastic proliferation mediated by inhibition of Wnt signaling pathway. These findings may help us to gain more insight into the potential mechanism of senile osteoporosis.
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Affiliation(s)
- Kagaku Azuma
- Department of Anatomy, School of Medicine, University of Occupational and Environmental Health, Yahatanishi-ku, Kitakyushu, 807-8555, Japan.
| | - Qian Zhou
- Department of Anatomy, School of Medicine, University of Occupational and Environmental Health, Yahatanishi-ku, Kitakyushu, 807-8555, Japan
| | - Kin-Ya Kubo
- Department of Food Science and Nutrition, Faculty of Human Life and Environmental Science, Nagoya Women's University, 3-40 Shioji-cho, Mizuho-ku, Nagoya, Aichi, 467-8610, Japan
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16
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Kong F, Shi X, Xiao F, Yang Y, Zhang X, Wang LS, Wu CT, Wang H. Transplantation of Hepatocyte Growth Factor-Modified Dental Pulp Stem Cells Prevents Bone Loss in the Early Phase of Ovariectomy-Induced Osteoporosis. Hum Gene Ther 2017; 29:271-282. [PMID: 28950723 DOI: 10.1089/hum.2017.091] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Investigations based on mesenchymal stem cells (MSCs) for osteoporosis have attracted attention recently. MSCs can be derived from various tissues, such as bone marrow, adipose, umbilical cord, placenta, and dental pulp. Among these, dental pulp-derived MSCs (DPSCs) and hepatocyte growth factor (HGF)-modified DPSCs (DPSCs-HGF) highly express osteogenic-related genes and have stronger osteogenic differentiation capacities. DPSCs have more benefits in treating osteoporosis. The purpose of this study was to investigate the roles of HGF gene-modified DPSCs in bone regeneration using a mouse model of ovariectomy (OVX)-induced bone loss. The HGF and luciferase genes were transferred into human DPSCs using recombinant adenovirus. These transduced cells were assayed for distribution or bone regeneration assay by transplantation into an OVX-induced osteoporosis model. By using bioluminogenic imaging, it was determined that some DPSCs could survive for >1 month in vivo. The DPSCs were mainly distributed to the lung in the early stage and to the liver in the late stage of OVX osteoporosis after administration, but they were scarcely distributed to the bone. The homing efficiency of DPSCs is higher when administrated in the early stage of a mouse OVX model. Micro-computed tomography indicated that DPSCs-Null or DPSCs-HGF transplantation significantly reduces OVX-induced bone loss in the trabecular bone of the distal femur metaphysis, and DPSCs-HGF show a stronger capacity to reduce bone loss. The data suggest that systemic infusion of DPSCs-HGF is a potential therapeutic approach for OVX-induced bone loss, which might be mediated by paracrine mechanisms.
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Affiliation(s)
- Fanxuan Kong
- 1 Department of Experimental Hematology, Beijing Institute of Radiation Medicine , Beijing, PR China .,2 Beijing Key Laboratory for Radiobiology , Beijing, PR China
| | - Xuefeng Shi
- 1 Department of Experimental Hematology, Beijing Institute of Radiation Medicine , Beijing, PR China .,3 Department of Respiration, Qinghai Provincial People's Hospital , Xining, PR China
| | - Fengjun Xiao
- 1 Department of Experimental Hematology, Beijing Institute of Radiation Medicine , Beijing, PR China .,2 Beijing Key Laboratory for Radiobiology , Beijing, PR China
| | - Yuefeng Yang
- 1 Department of Experimental Hematology, Beijing Institute of Radiation Medicine , Beijing, PR China .,2 Beijing Key Laboratory for Radiobiology , Beijing, PR China
| | - Xiaoyan Zhang
- 1 Department of Experimental Hematology, Beijing Institute of Radiation Medicine , Beijing, PR China .,2 Beijing Key Laboratory for Radiobiology , Beijing, PR China
| | - Li-Sheng Wang
- 1 Department of Experimental Hematology, Beijing Institute of Radiation Medicine , Beijing, PR China .,2 Beijing Key Laboratory for Radiobiology , Beijing, PR China
| | - Chu-Tse Wu
- 1 Department of Experimental Hematology, Beijing Institute of Radiation Medicine , Beijing, PR China .,2 Beijing Key Laboratory for Radiobiology , Beijing, PR China
| | - Hua Wang
- 1 Department of Experimental Hematology, Beijing Institute of Radiation Medicine , Beijing, PR China .,2 Beijing Key Laboratory for Radiobiology , Beijing, PR China
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17
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Xu X, Jia X, Mo L, Liu C, Zheng L, Yuan Q, Zhou X. Intestinal microbiota: a potential target for the treatment of postmenopausal osteoporosis. Bone Res 2017; 5:17046. [PMID: 28983411 PMCID: PMC5627629 DOI: 10.1038/boneres.2017.46] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Accepted: 07/24/2017] [Indexed: 02/08/2023] Open
Abstract
Postmenopausal osteoporosis (PMO) is a prevalent metabolic bone disease characterized by bone loss and structural destruction, which increases the risk of fracture in postmenopausal women. Owing to the high morbidity and serious complications of PMO, many efforts have been devoted to its prophylaxis and treatment. The intestinal microbiota is the complex community of microorganisms colonizing the gastrointestinal tract. Probiotics, which are dietary or medical supplements consisting of beneficial intestinal bacteria, work in concert with endogenous intestinal microorganisms to maintain host health. Recent studies have revealed that bone loss in PMO is closely related to host immunity, which is influenced by the intestinal microbiota. The curative effects of probiotics on metabolic bone diseases have also been demonstrated. The effects of the intestinal microbiota on bone metabolism suggest a promising target for PMO management. This review seeks to summarize the critical effects of the intestinal microbiota and probiotics on PMO, with a focus on the molecular mechanisms underlying the pathogenic relationship between bacteria and host, and to define the possible treatment options.
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Affiliation(s)
- Xin Xu
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xiaoyue Jia
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Longyi Mo
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Chengcheng Liu
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- Department of Periodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Liwei Zheng
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Quan Yuan
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- Department of Dental Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xuedong Zhou
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
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18
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Song M, Kim S, Kim T, Park S, Shin KH, Kang M, Park NH, Kim R. Development of a Direct Pulp-capping Model for the Evaluation of Pulpal Wound Healing and Reparative Dentin Formation in Mice. J Vis Exp 2017. [PMID: 28117776 DOI: 10.3791/54973] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Dental pulp is a vital organ of a tooth fully protected by enamel and dentin. When the pulp is exposed due to cariogenic or iatrogenic injuries, it is often capped with biocompatible materials in order to expedite pulpal wound healing. The ultimate goal is to regenerate reparative dentin, a physical barrier that functions as a "biological seal" and protects the underlying pulp tissue. Although this direct pulp-capping procedure has long been used in dentistry, the underlying molecular mechanism of pulpal wound healing and reparative dentin formation is still poorly understood. To induce reparative dentin, pulp capping has been performed experimentally in large animals, but less so in mice, presumably due to their small sizes and the ensuing technical difficulties. Here, we present a detailed, step-by-step method of performing a pulp-capping procedure in mice, including the preparation of a Class-I-like cavity, the placement of pulp-capping materials, and the restoration procedure using dental composite. Our pulp-capping mouse model will be instrumental in investigating the fundamental molecular mechanisms of pulpal wound healing in the context of reparative dentin in vivo by enabling the use of transgenic or knockout mice that are widely available in the research community.
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Affiliation(s)
- Minju Song
- The Shapiro Family Laboratory of Viral Oncology and Aging Research, The UCLA School of Dentistry
| | - Sol Kim
- The Shapiro Family Laboratory of Viral Oncology and Aging Research, The UCLA School of Dentistry
| | - Terresa Kim
- The Shapiro Family Laboratory of Viral Oncology and Aging Research, The UCLA School of Dentistry
| | - Sil Park
- The Shapiro Family Laboratory of Viral Oncology and Aging Research, The UCLA School of Dentistry
| | - Ki-Hyuk Shin
- The Shapiro Family Laboratory of Viral Oncology and Aging Research, The UCLA School of Dentistry; UCLA Jonsson Comprehensive Cancer Center
| | - Mo Kang
- The Shapiro Family Laboratory of Viral Oncology and Aging Research, The UCLA School of Dentistry; UCLA Jonsson Comprehensive Cancer Center
| | - No-Hee Park
- The Shapiro Family Laboratory of Viral Oncology and Aging Research, The UCLA School of Dentistry; UCLA Jonsson Comprehensive Cancer Center; David Geffen School of Medicine at UCLA
| | - Reuben Kim
- The Shapiro Family Laboratory of Viral Oncology and Aging Research, The UCLA School of Dentistry; UCLA Jonsson Comprehensive Cancer Center;
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Pang J, Ye M, Gu X, Cao Y, Zheng Y, Guo H, Zhao Y, Zhan H, Shi Y. Ovariectomy-Induced Osteopenia Influences the Middle and Late Periods of Bone Healing in a Mouse Femoral Osteotomy Model. Rejuvenation Res 2016; 18:356-65. [PMID: 25694054 DOI: 10.1089/rej.2015.1682] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
OBJECTIVE It is known that bone healing is delayed in the presence of osteoporosis in humans. However, due to the complexities of the healing of osteoporotic fractures, animal models may be more appropriate for studying the effects of osteoporosis in more detail and for testing drugs on the fracture repair process. The purpose of this study was to investigate the influence of ovariectomy-induced osteopenia in bone healing in an open femoral osteotomy model, and to test the feasibility of this model for evaluating the healing process under osteopenic conditions. METHODS Ovariectomized (OVX) mouse models were employed to assess the effects of osteopenia on fracture healing, A mid-shaft femur osteotomy model was also established 3 weeks after ovariectomy as an osteopenic fracture group (OVX group). Femurs were then harvested at 2 weeks and 6 weeks after fracture for X-ray radiography, micro-computed tomography (micro-CT), histology, and biomechanical analysis. A sham-operated group (sham group) was used for comparison. RESULTS The OVX mice had significantly lower bone volume density (BVF), volumetric bone mineral density (vBMD), and tissue mineral density (TMD) in the fracture calluses at 6 weeks (p<0.05), and similar trend was observed in 2 weeks. Additionally, larger calluses in OVX animals were observed via micro-CT and X-ray, but these did not result in better healing outcomes, as determined by biomechanical test at 6 weeks. Histological images of the healing fractures in the OVX mice found hastening of broken end resorption and delay of hard callus remodeling. The impaired biomechanical measurements in the OVX group (p<0.05) were consistent with micro-CT measurements and radiographic scoring, which also indicated delay in fracture healing of the OVX group. CONCLUSIONS This study provided evidence that ovariectomy-induced osteopenia impair the middle and late bone healing process. These data also supported the validity of the mouse femoral osteotomy model in evaluating the process of bone healing under osteopenic conditions.
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Affiliation(s)
- Jian Pang
- 1 Research Institute of Orthopaedics, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine , Shanghai, China .,3 Institute of Traumatology and Orthopaedics , Shanghai Academy of Traditional Chinese Medicine, Shanghai, China
| | - Meina Ye
- 2 Department of Breast Surgery, Longhua Hospital Affiliated to Shanghai University of Traditional Chinese Medicine , Shanghai, China
| | - Xinfeng Gu
- 3 Institute of Traumatology and Orthopaedics , Shanghai Academy of Traditional Chinese Medicine, Shanghai, China
| | - Yuelong Cao
- 1 Research Institute of Orthopaedics, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine , Shanghai, China
| | - Yuxin Zheng
- 1 Research Institute of Orthopaedics, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine , Shanghai, China
| | - Hailing Guo
- 1 Research Institute of Orthopaedics, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine , Shanghai, China
| | - Yongfang Zhao
- 1 Research Institute of Orthopaedics, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine , Shanghai, China
| | - Hongsheng Zhan
- 1 Research Institute of Orthopaedics, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine , Shanghai, China
| | - Yinyu Shi
- 1 Research Institute of Orthopaedics, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine , Shanghai, China
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Ardawi MSM, Badawoud MH, Hassan SM, Rouzi AA, Ardawi JMS, AlNosani NM, Qari MH, Mousa SA. Lycopene treatment against loss of bone mass, microarchitecture and strength in relation to regulatory mechanisms in a postmenopausal osteoporosis model. Bone 2016; 83:127-140. [PMID: 26549245 DOI: 10.1016/j.bone.2015.10.017] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Revised: 10/28/2015] [Accepted: 10/29/2015] [Indexed: 11/19/2022]
Abstract
Lycopene supplementation decreases oxidative stress and exhibits beneficial effects on bone health, but the mechanisms through which it alters bone metabolism in vivo remain unclear. The present study aims to evaluate the effects of lycopene treatment on postmenopausal osteoporosis. Six-month-old female Wistar rats (n=264) were sham-operated (SHAM) or ovariectomized (OVX). The SHAM group received oral vehicle only and the OVX rats were randomized into five groups receiving oral daily lycopene treatment (mg/kg body weight per day): 0 OVX (control), 15 OVX, 30 OVX, and 45 OVX, and one group receiving alendronate (ALN) (2μg/kg body weight per day), for 12weeks. Bone densitometry measurements, bone turnover markers, biomechanical testing, and histomorphometric analysis were conducted. Micro computed tomography was also used to evaluate changes in microarchitecture. Lycopene treatment suppressed the OVX-induced increase in bone turnover, as indicated by changes in biomarkers of bone metabolism: serum osteocalcin (s-OC), serum N-terminal propeptide of type 1 collagen (s-PINP), serum crosslinked carboxyterminal telopeptides (s-CTX-1), and urinary deoxypyridinoline (u-DPD). Significant improvement in OVX-induced loss of bone mass, bone strength, and microarchitectural deterioration was observed in lycopene-treated OVX animals. These effects were observed mainly at sites rich in trabecular bone, with less effect in cortical bone. Lycopene treatment down-regulated osteoclast differentiation concurrent with up-regulating osteoblast together with glutathione peroxidase (GPx) catalase (CAT) and superoxide dismutase (SOD) activities. These findings demonstrate that lycopene treatment in OVX rats primarily suppressed bone turnover to restore bone strength and microarchitecture.
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Affiliation(s)
- Mohammed-Salleh M Ardawi
- Center of Excellence for Osteoporosis Research, King Abdulaziz University, Jeddah, Saudi Arabia; Department of Clinical Biochemistry, King Abdulaziz University, Jeddah, Saudi Arabia; King Abdulaziz University Hospital, King Abdulaziz University, Jeddah, Saudi Arabia.
| | - Mohammed H Badawoud
- Center of Excellence for Osteoporosis Research, King Abdulaziz University, Jeddah, Saudi Arabia; Department of Anatomy, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Sherif M Hassan
- Center of Excellence for Osteoporosis Research, King Abdulaziz University, Jeddah, Saudi Arabia; Department of Anatomy, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Abdulrahim A Rouzi
- Center of Excellence for Osteoporosis Research, King Abdulaziz University, Jeddah, Saudi Arabia; Department of Obstetrics and Gynecology, King Abdulaziz University, Jeddah, Saudi Arabia; King Abdulaziz University Hospital, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Jumanah M S Ardawi
- Center of Excellence for Osteoporosis Research, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Nouf M AlNosani
- Center of Excellence for Osteoporosis Research, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Mohammed H Qari
- Center of Excellence for Osteoporosis Research, King Abdulaziz University, Jeddah, Saudi Arabia; Department of Haematology, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia; King Abdulaziz University Hospital, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Shaker A Mousa
- Center of Excellence for Osteoporosis Research, King Abdulaziz University, Jeddah, Saudi Arabia; Pharmaceutical Research Institute, Albany College of Pharmacy and Health Sciences, State of New York University, Rensselaer, NY, USA
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Effects of brown rice diets inoculated with Lactobacillus sakei Wikim001 having phytase activity on the osteoporosis in ovariectomized mice model. Food Sci Biotechnol 2015. [DOI: 10.1007/s10068-015-0178-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Kauschke V, Lips KS, Heiss C, Schnettler R. Expression of muscarinic acetylcholine receptors M3 and M5 in osteoporosis. Med Sci Monit 2014; 20:869-74. [PMID: 24866457 PMCID: PMC4049973 DOI: 10.12659/msm.890217] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Background Cholinergic signaling via muscarinic acetylcholine receptors (mAChR) is known to influence various physiological functions. In bone, M3 mAChR and M5 mAChR were identified on the membrane of osteoblast-like cells. M3 mAChR seems to be particularly relevant for bone physiology, as signaling via this receptor was reported to increase bone formation and decrease bone resorption. Thus, in the present study we investigated the relative mRNA expression of M3 and M5 mAChR in bones of a rat osteoporosis model. Material/Methods Osteoporosis was induced in Sprague-Dawley rats by bilateral ovariectomy and additional feeding of a diet deficient in calcium, vitamins C, D2, D3, and phosphorus, and free of soy and phytoestrogen. After a period of 3, 12, and 14 months, relative mRNA expression of M3 mAChR and M5 mAChR was analyzed in the 11th thoracic vertebra by real-time RT-PCR. Results Relative mRNA expression of M3 mAChR was significantly reduced in bones of osteoporotic rats compared to sham operated animals that served as controls. Further, M3 mAChR mRNA expression was significantly down-regulated when comparing 14-month osteoporotic rats to 3-month osteoporotic rats. Relative M5 mAChR mRNA was expressed to a lesser extent than M3 mAChR and did not show significant differences in mRNA expression level between the experimental groups. Conclusions M3 mAChR mRNA expression was reduced upon induction of osteoporosis and progression of disease was associated with further decrease of this receptor, indicating that M3 mAChR is involved in the development and regulation of osteoporosis.
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Affiliation(s)
- Vivien Kauschke
- Laboratory of Experimental Trauma Surgery, Justus-Liebig-University Giessen, Giessen, Germany
| | - Katrin Susanne Lips
- Laboratory of Experimental Trauma Surgery, Justus-Liebig-University Giessen, Giessen, Germany
| | - Christian Heiss
- Department of Trauma Surgery, University Hospital of Giessen-Marburg, Giessen, Germany
| | - Reinhard Schnettler
- Department of Trauma Surgery, University Hospital of Giessen-Marburg, Giessen, Germany
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Emmerson E, Campbell L, Davies FCJ, Ross NL, Ashcroft GS, Krust A, Chambon P, Hardman MJ. Insulin-like growth factor-1 promotes wound healing in estrogen-deprived mice: new insights into cutaneous IGF-1R/ERα cross talk. J Invest Dermatol 2012; 132:2838-48. [PMID: 22810305 DOI: 10.1038/jid.2012.228] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Although it is understood that endogenous IGF-1 is involved in the wound repair process, the effects of exogenous IGF-1 administration on wound repair remain largely unclear. In addition, the signaling links between IGF-1 receptor (IGF-1R) and estrogen receptors (ERs), which have been elucidated in other systems, have yet to be explored in the context of skin repair. In this study, we show that locally administered IGF-1 promotes wound repair in an estrogen-deprived animal model, the ovariectomized (Ovx) mouse, principally by dampening the local inflammatory response and promoting re-epithelialization. Using specific IGF-1R and ER antagonists in vivo, we reveal that IGF-1-mediated effects on re-epithelialization are directly mediated by IGF-1R. By contrast, the anti-inflammatory effects of IGF-1 are predominantly via the ERs, in particular ERα. Crucially, in ERα-null mice, IGF-1 fails to promote healing, and local inflammation is increased. Our findings illustrate the complex interactions between IGF-1 and estrogen in skin. The fact that IGF-1 may compensate for estrogen deficiency in wound repair, and potentially other contexts, is an important consideration for the treatment of postmenopausal pathology.
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Affiliation(s)
- Elaine Emmerson
- The Healing Foundation Centre, The University of Manchester, Manchester, UK
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Effect of estrogens on bone marrow adipogenesis and Sirt1 in aging C57BL/6J mice. Biogerontology 2009; 10:747-55. [DOI: 10.1007/s10522-009-9221-7] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2008] [Accepted: 03/17/2009] [Indexed: 10/21/2022]
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Abrams SA, Strewler GJ. Adolescence: How do we increase intestinal calcium absorption to allow for bone mineral mass accumulation? ACTA ACUST UNITED AC 2007. [DOI: 10.1138/20070260] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Borer KT. Physical activity in the prevention and amelioration of osteoporosis in women : interaction of mechanical, hormonal and dietary factors. Sports Med 2005; 35:779-830. [PMID: 16138787 DOI: 10.2165/00007256-200535090-00004] [Citation(s) in RCA: 226] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Osteoporosis is a serious health problem that diminishes quality of life and levies a financial burden on those who fear and experience bone fractures. Physical activity as a way to prevent osteoporosis is based on evidence that it can regulate bone maintenance and stimulate bone formation including the accumulation of mineral, in addition to strengthening muscles, improving balance, and thus reducing the overall risk of falls and fractures. Currently, our understanding of how to use exercise effectively in the prevention of osteoporosis is incomplete. It is uncertain whether exercise will help accumulate more overall peak bone mass during childhood, adolescence and young adulthood. Also, the consistent effectiveness of exercise to increase bone mass, or at least arrest the loss of bone mass after menopause, is also in question. Within this framework, section 1 introduces mechanical characteristics of bones to assist the reader in understanding their responses to physical activity. Section 2 reviews hormonal, nutritional and mechanical factors necessary for the growth of bones in length, width and mineral content that produce peak bone mass in the course of childhood and adolescence using a large sample of healthy Caucasian girls and female adolescents for reference. Effectiveness of exercise is evaluated throughout using absolute changes in bone with the underlying assumption that useful exercise should produce changes that approximate or exceed the absolute magnitude of bone parameters in a healthy reference population. Physical activity increases growth in width and mineral content of bones in girls and adolescent females, particularly when it is initiated before puberty, carried out in volumes and at intensities seen in athletes, and accompanied by adequate caloric and calcium intakes. Similar increases are seen in young women following the termination of statural growth in response to athletic training, but not to more limited levels of physical activity characteristic of longitudinal training studies. After 9-12 months of regular exercise, young adult women often show very small benefits to bone health, possibly because of large subject attrition rates, inadequate exercise intensity, duration or frequency, or because at this stage of life accumulation of bone mass may be at its natural peak. The important influence of hormones as well as dietary and specific nutrient abundance on bone growth and health are emphasised, and premature bone loss associated with dietary restriction and estradiol withdrawal in exercise-induced amenorrhoea is described. In section 3, the same assessment is applied to the effects of physical activity in postmenopausal women. Studies of postmenopausal women are presented from the perspective of limitations of the capacity of the skeleton to adapt to mechanical stress of exercise due to altered hormonal status and inadequate intake of specific nutrients. After menopause, effectiveness of exercise to increase bone mineral depends heavily on adequate availability of dietary calcium. Relatively infrequent evidence that physical activity prevents bone loss or increases bone mineral after menopause may be a consequence of inadequate calcium availability or low intensity of exercise in training studies. Several studies with postmenopausal women show modest increases in bone mineral toward the norm seen in a healthy population in response to high-intensity training. Physical activities continue to stimulate increases in bone diameter throughout the lifespan. These exercise-stimulated increases in bone diameter diminish the risk of fractures by mechanically counteracting the thinning of bones and increases in bone porosity. Seven principles of bone adaptation to mechanical stress are reviewed in section 4 to suggest how exercise by human subjects could be made more effective. They posit that exercise should: (i) be dynamic, not static; (ii) exceed a threshold intensity; (iii) exceed a threshold strain frequency; (iv) be relatively brief but intermittent; (v) impose an unusual loading pattern on the bones; (vi) be supported by unlimited nutrient energy; and (vii) include adequate calcium and cholecalciferol (vitamin D3) availability.
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Affiliation(s)
- Katarina T Borer
- Division of Kinesiology, The University of Michigan, Ann Arbor, Michigan 48109-2214, USA.
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27
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Miura M, Chen XD, Allen MR, Bi Y, Gronthos S, Seo BM, Lakhani S, Flavell RA, Feng XH, Robey PG, Young M, Shi S. A crucial role of caspase-3 in osteogenic differentiation of bone marrow stromal stem cells. J Clin Invest 2004; 114:1704-13. [PMID: 15599395 PMCID: PMC535063 DOI: 10.1172/jci20427] [Citation(s) in RCA: 191] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2003] [Accepted: 10/19/2004] [Indexed: 12/25/2022] Open
Abstract
Caspase-3 is a critical enzyme for apoptosis and cell survival. Here we report delayed ossification and decreased bone mineral density in caspase-3-deficient (Casp3(-/-) and Casp3(+/-)) mice due to an attenuated osteogenic differentiation of bone marrow stromal stem cells (BMSSCs). The mechanism involved in the impaired differentiation of BMSSCs is due, at least partially, to the overactivated TGF-beta/Smad2 signaling pathway and the upregulated expressions of p53 and p21 along with the downregulated expressions of Cdk2 and Cdc2, and ultimately increased replicative senescence. In addition, the overactivated TGF-beta/Smad2 signaling may result in the compromised Runx2/Cbfa1 expression in preosteoblasts. Furthermore, we demonstrate that caspase-3 inhibitor, a potential agent for clinical treatment of human diseases, caused accelerated bone loss in ovariectomized mice, which is also associated with the overactivated TGF-beta/Smad2 signaling in BMSSCs. This study demonstrates that caspase-3 is crucial for the differentiation of BMSSCs by influencing TGF-beta/Smad2 pathway and cell cycle progression.
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Affiliation(s)
- Masako Miura
- Craniofacial and Skeletal Diseases Branch, National Institute of Dental and Craniofacial Research (NIDCR), NIH, Bethesda, MD 20892, USA
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Kimura Y, Buddington KK, Buddington RK. The influence of estradiol and diet on small intestinal glucose transport in ovariectomized rats. Exp Biol Med (Maywood) 2004; 229:227-34. [PMID: 14988514 DOI: 10.1177/153537020422900302] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Although gender differences exist for intestinal absorption of nutrients and drugs, the possible role estradiol may play in modulating nutrient transport has not been established. Therefore, small intestine glucose transport was measured 1 week after administering estradiol to ovariectomized rats fed diets high in carbohydrate (C) or protein (P). Rats treated with estradiol ate 21% less (P<0.05) and lost body mass (7%; P<0.05) but did not have smaller intestines. Administration of estradiol increased rates of glucose transport, but only when the rats were fed the C diet. These findings indicate that estradiol causes a disconnect between food intake and the dimensions and nutrient transport capacities of the small intestine. Furthermore, the responses to estradiol are influenced by diet composition, are not of the same magnitude for rats and dogs, and can be predicted to affect systemic availability of nutrients and drugs.
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Affiliation(s)
- Yasuhiro Kimura
- Department of Biological Sciences, Mississippi State University, Mississippi State, Mississippi 39762, USA
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Van Cromphaut SJ, Rummens K, Stockmans I, Van Herck E, Dijcks FA, Ederveen AGH, Carmeliet P, Verhaeghe J, Bouillon R, Carmeliet G. Intestinal calcium transporter genes are upregulated by estrogens and the reproductive cycle through vitamin D receptor-independent mechanisms. J Bone Miner Res 2003; 18:1725-36. [PMID: 14584880 DOI: 10.1359/jbmr.2003.18.10.1725] [Citation(s) in RCA: 153] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
UNLABELLED 1alpha,25(OH)2-vitamin D strongly regulates the expression of the epithelial calcium channel CaT1. CaT1 expression is reduced in ERKOalpha mice and induced by estrogen treatment, pregnancy, or lactation in VDR WT and KO mice. Estrogens and vitamin D are thus independent potent regulators of the expression of this calcium influx mechanism, which is involved in active intestinal calcium absorption. INTRODUCTION Active duodenal calcium absorption consists of three major steps: calcium influx into, transfer through, and extrusion out of the enterocyte. These steps are carried out by the calcium transport protein 1 (CaT1), calbindin-D9K, and the plasma membrane calcium ATPase (PMCA1b), respectively. We investigated whether estrogens or hormonal changes during the female reproductive cycle influence the expression of these genes, and if so, whether these effects are vitamin D-vitamin D receptor (VDR) dependent. MATERIALS AND METHODS We evaluated duodenal expression patterns in estrogen receptor (ER)alpha and -beta knockout (KO) mice, as well as in ovariectomized, estrogen-treated, pregnant, and lactating VDR wild-type (WT) and VDR KO mice. RESULTS Expression of calcium transporter genes was not altered in ERKObeta mice. CaT1 mRNA expression was reduced by 55% in ERKOalpha mice, while the two other calcium transporter genes were not affected. Ovariectomy caused no change in duodenal expression pattern of VDR WT and KO mice, whereas treatment with a pharmacologic dose of estrogens induced CaT1 mRNA expression in VDR WT (4-fold) and KO (8-fold) mice. Pregnancy enhanced CaTI expression equally in VDR WT and KO mice (12-fold). Calbindin-D9K and PMCA1b expression increased to a lesser extent and solely in pregnant VDR WT animals. In lactating VDR WT and KO mice, CaT1 mRNA expression increased 13 times, which was associated with a smaller increase in calbindin-D9K protein content and PMCA1b mRNA expression. CONCLUSIONS Estrogens or hormonal changes during pregnancy or lactation have distinct, vitamin D-independent effects at the genomic level on active duodenal calcium absorption mechanisms, mainly through a major upregulation of the calcium influx channel CaT1. The estrogen effects seem to be mediated solely by ERalpha.
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Affiliation(s)
- S J Van Cromphaut
- Laboratory of Experimental Medicine and Endocrinology (Legendo), Katholieke Universiteit Leuven, Leuven, Belgium
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James P, Sabatier JP, Bureau F, Laroche D, Jauzac P, Arhan P, Bouglé D. Influence of dietary protein and phyto-oestrogens on bone mineralization in the young rat. Nutr Res 2002. [DOI: 10.1016/s0271-5317(01)00390-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Srivastava AK, Bhattacharyya S, Castillo G, Miyakoshi N, Mohan S, Baylink DJ. Development and evaluation of C-telopeptide enzyme-linked immunoassay for measurement of bone resorption in mouse serum. Bone 2000; 27:529-33. [PMID: 11033448 DOI: 10.1016/s8756-3282(00)00356-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
The mouse is increasingly being used as an animal model for the study of skeletal phenotypes in humans, mainly because of the ease of genetic manipulation. Biochemical markers of bone metabolism provide a valuable parameter for the assessment of skeletal metabolism. In the mouse model, assays for bone formation have been available for a long time; however, little is known about bone resorption markers. The present study describes the development of a serum C-telopeptide enzyme-linked immunoassay (ELISA), which measures degradation products of type I collagen that are generated by osteoclastic bone resorption. The C-telopeptide ELISA uses affinity-purified antibodies generated against human sequence DFSFLPQPPQEKAHDGGR. The epitope involves an amino acid sequence, which is identical in the mouse and human C-terminal peptide of type I collagen (alpha1 chain). Sensitivity of the ELISA used was <0.1 ng/mL. The average intra- (n = 10) and interassay (n = 8) coefficient of variation for two controls was <12%. The average dilution and spike recovery rates were 98% and 97%, respectively. Application of the ELISA to measure C-telopeptide in 3-4-week postovariectomized (ovx) C57BL/6J (B6) mice (n = 9 or 10) showed a 45% higher C-telopeptide concentration than the sham-operated mice. Treatment of ovx mice with estradiol (400 microg/kg body weight) or alendronate (1.0 mg/kg body weight) resulted in a 20%-50% decrease in C-telopeptide levels compared to the vehicle-treated ovx group. In addition, B6 mice fed a calcium-deficient diet (0.01% calcium) showed a 50% higher C-telopeptide concentration compared to the B6 mice receiving a normal diet (0.6% calcium). In conclusion, the C-telopeptide ELISA exhibited acceptable analytical performance and sufficient discriminatory power to show expected directional changes in the rate of bone resorption following ovariectomy, ovx plus estradiol or alendronate treatment, and administration of a calcium-deficient diet. Therefore, the ELISA developed in this study could be used for measuring bone resorption in the mouse model.
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Affiliation(s)
- A K Srivastava
- Musculoskeletal Disease Center, Jerry L. Pettis VA Medical Center and Loma Linda University, Loma Linda, CA 92357, USA
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Abstract
Previous reports indicate that peak bone density is significantly higher in C3H/HeJ (C3H) than in C57BL/6J (C57BL) mice, making these two inbred strains useful models for studying the genetic basis for peak bone density. The following study was undertaken to examine whether strain differences in the bone density of C3H and C57BL mice are associated with differences in intestinal calcium (Ca) absorption. Calcium absorption was measured by the balance technique and animals received two injections of fluorochromes 5 days apart before killing. Subsequently, the femurs were removed and, following measurement of volumetric density, the left femur was divided into three equal parts and the middle third served as the femoral cortical diaphysis. Femur diaphyseal volumetric bone density, ash, and Ca content were 10%, 29%, and 29% higher in C3H than in C57BL mice (p < 0.001), respectively. Bone length, periosteal mineral apposition rate, and periosteal bone formation rate of femoral diaphyseal cortical bone were not significantly different between the two strains of mice, but the marrow area of C57BL mice was almost twofold that of C3H mice (p < 0.0001). Intestinal Ca absorption and 1,25-dihydroxyvitamin D [1,25(OH)2D]-stimulated Ca2+ uptake by intestinal mucosal cells were 38% and 51% higher in C3H than in C57BL mice p < 0.001), respectively. Serum Ca and 1,25(OH)2D levels were 6% and 32% higher in C3H than in C57BL mice (p < 0.001), respectively, and the number of intestinal-occupied vitamin D receptors was 51% higher in C3H than in C57BL mice (p < 0.01). In a second experiment, three groups of C3H mice and three groups of C57BL mice were fed diets that contained 0.4%, 0.1%, or 0.02% Ca, and serum Ca, 1,25(OH)2D, parathyroid hormone (PTH), and intestinal Ca absorption measured. At all dietary Ca levels, C3H mice maintained positive Ca absorption and absorbed significantly more Ca than C57BL mice. In contrast, at low dietary Ca levels (0.1% and 0.02% Ca), C57BL mice maintained negative Ca absorption. Low dietary Ca increased serum PTH significantly in C57BL but not in C3H mice, and decreased serum 1,25(OH)2D and Ca levels in both strains of mice. Our findings indicate that the C57BL mice relied more on the mobilization of Ca from bone to maintain extracellular Ca homeostasis than the C3H mice. We conclude that strain differences in bone mass and density between C3H and C57BL mice is expressed, in part, through the vitamin D and PTH endocrine systems and their effects on the maintenance of extracellular Ca homeostasis.
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Affiliation(s)
- C Chen
- Department of Physiology, University of Texas Health Science Center at San Antonio, 78284-7756, USA
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