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Hansdah K, Lui JC. Emerging Insights into the Endocrine Regulation of Bone Homeostasis by Gut Microbiome. J Endocr Soc 2024; 8:bvae117. [PMID: 38957653 PMCID: PMC11215793 DOI: 10.1210/jendso/bvae117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Indexed: 07/04/2024] Open
Abstract
Gut microbiota plays an important role in the regulation of bone homeostasis and bone health. Recent studies showed that these effects could be mediated through microbial metabolites released by the microbiota like short-chain fatty acids, metabolism of endogenous molecules such as bile acids, or a complex interplay between microbiota, the endocrine system, and the immune system. Importantly, some studies showed a reciprocal relationship between the endocrine system and gut microbiota. For instance, postmenopausal estrogen deficiency could lead to dysbiosis of the gut microbiota, which could in turn affect various immune response and bone remodeling. In addition, evidence showed that shift in the indigenous gut microbiota caused by antibiotics treatment may also impact normal skeletal growth and maturation. In this mini-review, we describe recent findings on the role of microbiome in bone homeostasis, with a particular focus on molecular mechanisms and their interactions with the endocrine and immune system. We will also discuss the recent findings on estrogen deficiency and microbiota dysbiosis, and the clinical implications for the development of new therapeutic strategies for osteoporosis and other bone disorders.
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Affiliation(s)
- Kirtal Hansdah
- Section on Growth and Development, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA
| | - Julian C Lui
- Section on Growth and Development, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA
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Cao Y, Gao Y, Huang J. Perturbations in gut microbiota composition in osteoporosis: a systematic review and meta-analysis. J Bone Miner Metab 2024:10.1007/s00774-024-01517-3. [PMID: 38864923 DOI: 10.1007/s00774-024-01517-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Accepted: 05/08/2024] [Indexed: 06/13/2024]
Abstract
INTRODUCTION Osteoporosis (OP) is a chronic bone metabolic disease, which causes a great social and economic burden. The gut microbiota (GM) has become a recent topic of interest in the role of many disease states. Changes in the GM are correlated with the maintenance of bone mass and bone quality. However, research results in this field remain highly controversial. We performed a mate-analysis to explore and compare the alterations of GM in OP patients. MATERIALS AND METHODS According to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA), we comprehensively searched the databases of PubMed, Web of Science, Embase, Cochrane Library, CNKI, VIP, CBM, and Wanfang. In addition, we applied the Stata 17.0 software for data analysis. Bias controls were evaluated with the Newcastle-Ottawa scale (NOS), funnel plot analysis, and Egger's and Begg's tests. RESULTS This research ultimately considered 16 studies, which included the fecal GM data of 2340 people (664 with OP and 1676 healthy controls). The pooled estimate showed an increase of borderline significance on ACE index in patients with OP compared with control participants (SMD = 1.05; 95% CI 0.00-2.10; P = 0.05). There were no significant differences in Chao1, Shannon and Simpson indices. At the phylum level, no significant differences were observed between the OP patients and HCs in the overall analysis. At the genus level, the relative abundance of Blautia presented a decrease of borderline significance between OP and the control group (SMD = - 0.32, 95% CI - 0.65 to - 0.00, P = 0.05). CONCLUSION This systematic review and meta-analysis suggests that patients with OP may exhibit dysbiosis in their gut microbiota, characterized by a reduction in certain anti-inflammatory butyrate-producing bacteria and an enrichment of pro-inflammatory bacterial populations.
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Affiliation(s)
- Yun Cao
- Department of Traditional Chinese Medicine, Beijing Jishuitan Hospital, Capital Medical University, Beijing, China
| | - Yemei Gao
- Department of Traditional Chinese Medicine, Beijing Jishuitan Hospital, Capital Medical University, Beijing, China
| | - Jiaqin Huang
- Department of Traditional Chinese Medicine, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China.
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Li N, Wang H, Pei H, Wu Y, Li L, Ren Y, Wang S, Ma Y, Luo M, Yuan J, Li L, Qin D. Genus_Ruminococcus and order_Burkholderiales affect osteoporosis by regulating the microbiota-gut-bone axis. Front Microbiol 2024; 15:1373013. [PMID: 38835486 PMCID: PMC11148449 DOI: 10.3389/fmicb.2024.1373013] [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: 01/19/2024] [Accepted: 05/07/2024] [Indexed: 06/06/2024] Open
Abstract
Background This study aimed to clarify the relationship between the gut microbiota and osteoporosis combining Mendelian randomization (MR) analysis with animal experiments. Methods We conducted an analysis on the relationship between differential bacteria and osteoporosis using open-access genome-wide association study (GWAS) data on gut microbe and osteoporosis obtained from public databases. The analysis was performed using two-sample MR analysis, and the causal relationship was examined through inverse variance weighting (IVW), MR Egger, weighted median, and weighted mode methods. Bilateral oophorectomy was employed to replicate the mouse osteoporosis model, which was assessed by micro computed tomography (CT), pathological tests, and bone transformation indexes. Additionally, 16S rDNA sequencing was conducted on fecal samples, while SIgA and indexes of IL-6, IL-1β, and TNF-α inflammatory factors were examined in colon samples. Through immunofluorescence and histopathology, expression levels of tight junction proteins, such as claudin-1, ZO-1, and occludin, were assessed, and conduct correlation analysis on differential bacteria and related environmental factors were performed. Results A positive correlation was observed between g_Ruminococcus1 and the risk of osteoporosis, while O_Burkholderiales showed a negative correlation with the risk of osteoporosis. Furthermore, there was no evidence of heterogeneity or pleiotropy. The successful replication of the mouse osteoporosis model was assessed, and it was found that the abundance of the O_Burkholderiales was significantly reduced, while the abundance of g_Ruminococcus was significantly increased in the ovariectomized (OVX)-mice. The intestinal SIgA level of OVX mice decreased, the expression level of inflammatory factors increased, barrier damage occurred, and the content of LPS in the colon and serum significantly increased. The abundance level of O_Burkholderiales is strongly positively correlated with bone formation factors, gut barrier indicators, bone density, bone volume fraction, and trabecular bone quantity, whereas it was strongly negatively correlated with bone resorption factors and intestinal inflammatory factors, The abundance level of g_Ruminococcus shows a strong negative correlation with bone formation factors, gut barrier indicators, and bone volume fraction, and a strong positive correlation with bone resorption factors and intestinal inflammatory factors. Conclusion O_Burkholderiales and g_Ruminococcus may regulate the development of osteoporosis through the microbiota-gut-bone axis.
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Affiliation(s)
- Ning Li
- First Clinical Medical College, Yunnan University of Chinese Medicine, Kunming, China
- Key Laboratory of Integrated Chinese and Western Medicine for Chronic Disease Prevention and Control, Yunnan University of Chinese Medicine, Yunnan Province, Kunming, China
| | - Haiyang Wang
- First Clinical Medical College, Yunnan University of Chinese Medicine, Kunming, China
| | - Huan Pei
- Key Laboratory of Integrated Chinese and Western Medicine for Chronic Disease Prevention and Control, Yunnan University of Chinese Medicine, Yunnan Province, Kunming, China
| | - Yueying Wu
- Key Laboratory of Integrated Chinese and Western Medicine for Chronic Disease Prevention and Control, Yunnan University of Chinese Medicine, Yunnan Province, Kunming, China
| | - Lei Li
- Key Laboratory of Integrated Chinese and Western Medicine for Chronic Disease Prevention and Control, Yunnan University of Chinese Medicine, Yunnan Province, Kunming, China
| | - Yu Ren
- Key Laboratory of Integrated Chinese and Western Medicine for Chronic Disease Prevention and Control, Yunnan University of Chinese Medicine, Yunnan Province, Kunming, China
| | - Si Wang
- First Clinical Medical College, Yunnan University of Chinese Medicine, Kunming, China
- Key Laboratory of Integrated Chinese and Western Medicine for Chronic Disease Prevention and Control, Yunnan University of Chinese Medicine, Yunnan Province, Kunming, China
| | - Yuan Ma
- The Third People's Hospital of Yunnan Province, Kunming, China
| | - Miao Luo
- Kunming Municipal Hospital of Traditional Chinese Medicine, The Third Affiliated Hospital of Yunnan University of Chinese Medicine, Kunming, China
| | - Jiali Yuan
- Key Laboratory of Integrated Chinese and Western Medicine for Chronic Disease Prevention and Control, Yunnan University of Chinese Medicine, Yunnan Province, Kunming, China
| | - Lvyu Li
- Kunming Municipal Hospital of Traditional Chinese Medicine, The Third Affiliated Hospital of Yunnan University of Chinese Medicine, Kunming, China
| | - Dongdong Qin
- Key Laboratory of Integrated Chinese and Western Medicine for Chronic Disease Prevention and Control, Yunnan University of Chinese Medicine, Yunnan Province, Kunming, China
- Key Laboratory of Traditional Chinese Medicine for Prevention and Treatment of Neuropsychiatric Diseases, Yunnan University of Chinese Medicine, Kunming, China
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Zeng J, Qian Y, Yang J, Chen X, Fu C, Che Z, Feng Y, Yin J. Nutritional therapy bridges the critical cut-off point for the closed-loop role of type 2 diabetes and bone homeostasis: A narrative review. Heliyon 2024; 10:e28229. [PMID: 38689978 PMCID: PMC11059410 DOI: 10.1016/j.heliyon.2024.e28229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 03/08/2024] [Accepted: 03/13/2024] [Indexed: 05/02/2024] Open
Abstract
Currently, osteoporosis-related fractures become the most cutting-edge problem of diabetes-related complications. Rational diet is not only the basis of glycemic management in type 2 diabetes patients, but also the direction of diabetic bone health. This review highlights the importance of micronutrient supplementation (including calcium, magnesium, zinc, vitamin D, vitamin K, and vitamin C) for patients with T2DM, as well as describing the constructive intermediary role of gut flora between T2DM and bone through nutrients predominantly high in dietary fiber. In addition, it is recommended to combine the Mediterranean dietary pattern with other diversified management approaches to prevent OP. Therefore, this provides a theoretical basis for the potential role of islet β-cells in promoting bone health.
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Affiliation(s)
- Jia Zeng
- School of Public Health, Kunming Medical University, Kunming, 650500, China
| | - Ying Qian
- School of Public Health, Kunming Medical University, Kunming, 650500, China
| | - Jizhuo Yang
- School of Public Health, Kunming Medical University, Kunming, 650500, China
| | - Xinqiang Chen
- School of Public Health, Kunming Medical University, Kunming, 650500, China
| | - Chuanwen Fu
- School of Public Health, Kunming Medical University, Kunming, 650500, China
| | - Zhuohang Che
- School of Public Health, Kunming Medical University, Kunming, 650500, China
| | - Yuemei Feng
- School of Public Health, Kunming Medical University, Kunming, 650500, China
| | - Jianzhong Yin
- School of Public Health, Kunming Medical University, Kunming, 650500, China
- Baoshan College of Traditional Chinese Medicine, Baoshan, 678000, China
- Yunnan Provincial Key Laboratary of Public Health and Biosafety, Kunming, 650500, China
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Han D, Wang W, Gong J, Ma Y, Li Y. Microbiota metabolites in bone: Shaping health and Confronting disease. Heliyon 2024; 10:e28435. [PMID: 38560225 PMCID: PMC10979239 DOI: 10.1016/j.heliyon.2024.e28435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Revised: 02/16/2024] [Accepted: 03/19/2024] [Indexed: 04/04/2024] Open
Abstract
The intricate interplay between the gut microbiota and bone health has become increasingly recognized as a fundamental determinant of skeletal well-being. Microbiota-derived metabolites play a crucial role in dynamic interaction, specifically in bone homeostasis. In this sense, short-chain fatty acids (SCFAs), including acetate, propionate, and butyrate, indirectly promote bone formation by regulating insulin-like growth factor-1 (IGF-1). Trimethylamine N-oxide (TMAO) has been found to increase the expression of osteoblast genes, such as Runt-related transcription factor 2 (RUNX2) and bone morphogenetic protein-2 (BMP2), thus enhancing osteogenic differentiation and bone quality through BMP/SMADs and Wnt signaling pathways. Remarkably, in the context of bone infections, the role of microbiota metabolites in immune modulation and host defense mechanisms potentially affects susceptibility to infections such as osteomyelitis. Furthermore, ongoing research elucidates the precise mechanisms through which microbiota-derived metabolites influence bone cells, such as osteoblasts and osteoclasts. Understanding the multifaceted influence of microbiota metabolites on bone, from regulating homeostasis to modulating susceptibility to infections, has the potential to revolutionize our approach to bone health and disease management. This review offers a comprehensive exploration of this evolving field, providing a holistic perspective on the impact of microbiota metabolites on bone health and diseases.
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Affiliation(s)
- Dong Han
- Department of Trauma Orthopedics, Yantaishan Hospital, Yantai 264000, China
| | - Weijiao Wang
- Department of Otolaryngology, Yantaishan Hospital, Yantai 264000, China
| | - Jinpeng Gong
- Department of Trauma Orthopedics, Yantaishan Hospital, Yantai 264000, China
| | - Yupeng Ma
- Department of Trauma Orthopedics, Yantaishan Hospital, Yantai 264000, China
| | - Yu Li
- Department of Trauma Orthopedics, Yantaishan Hospital, Yantai 264000, China
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Granata V, Strina D, Schiavone ML, Bottazzi B, Mantovani A, Inforzato A, Sobacchi C. Genetic Deficiency of the Long Pentraxin 3 Affects Osteogenesis and Osteoclastogenesis in Homeostatic and Inflammatory Conditions. Int J Mol Sci 2023; 24:16648. [PMID: 38068970 PMCID: PMC10706359 DOI: 10.3390/ijms242316648] [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] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 11/13/2023] [Accepted: 11/20/2023] [Indexed: 12/18/2023] Open
Abstract
The long pentraxin 3 (PTX3) is a soluble glycoprotein made by immune and nonimmune cells endowed with pleiotropic functions in innate immunity, inflammation, and tissue remodeling. PTX3 has recently emerged as a mediator of bone turnover in both physiological and pathological conditions, with direct and indirect effects on osteoblasts and osteoclasts. This notwithstanding, its role in bone biology, with major regard to the osteogenic potential of osteoblasts and their interplay with osteoclasts, is at present unclear. Here, we investigated the contribution of this pentraxin to bone deposition in the osteogenic lineage by assessing collagen production, mineralization capacity, osteoblast maturation, extracellular matrix gene expression, and inflammatory mediators' production in primary osteoblasts from the calvaria of wild-type (WT) and Ptx3-deficient (Ptx3-/-) mice. Also, we evaluated the effect of PTX3 on osteoclastogenesis in cocultures of primary osteoblasts and bone marrow-derived osteoclasts. Our investigations were carried out both in physiological and inflammatory conditions to recapitulate in vitro aspects of inflammatory diseases of the bone. We found that primary osteoblasts from WT animals constitutively expressed low levels of the protein in osteogenic noninflammatory conditions, and genetic ablation of PTX3 in these cells had no major impact on collagen and hydroxyapatite deposition. However, Ptx3-/- osteoblasts had an increased RANKL/OPG ratio and CD44 expression, which resulted in in enhanced osteoclastogenesis when cocultured with bone marrow monocytes. Inflammation (modelled through administration of tumor necrosis factor-α, TNF-α) boosted the expression and accumulation of PTX3 and inflammatory mediators in WT osteoblasts. In these conditions, Ptx3 genetic depletion was associated with reduced collagen deposition and immune modulators' production. Our study shed light on the role of PTX3 in osteoblast and osteoclast biology and identified a major effect of inflammation on the bone-related properties of this pentraxin, which might be relevant for therapeutic and/or diagnostic purposes in musculoskeletal pathology.
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Affiliation(s)
- Valentina Granata
- IRCCS Humanitas Research Hospital, 20089 Rozzano, Italy; (V.G.); (D.S.); (M.L.S.); (B.B.); (A.M.)
| | - Dario Strina
- IRCCS Humanitas Research Hospital, 20089 Rozzano, Italy; (V.G.); (D.S.); (M.L.S.); (B.B.); (A.M.)
- Milan Unit, Institute for Genetic and Biomedical Research (IRGB), National Research Council (CNR), 20138 Milan, Italy
| | - Maria Lucia Schiavone
- IRCCS Humanitas Research Hospital, 20089 Rozzano, Italy; (V.G.); (D.S.); (M.L.S.); (B.B.); (A.M.)
| | - Barbara Bottazzi
- IRCCS Humanitas Research Hospital, 20089 Rozzano, Italy; (V.G.); (D.S.); (M.L.S.); (B.B.); (A.M.)
| | - Alberto Mantovani
- IRCCS Humanitas Research Hospital, 20089 Rozzano, Italy; (V.G.); (D.S.); (M.L.S.); (B.B.); (A.M.)
- Department of Biomedical Sciences, Humanitas University, 20072 Pieve Emanuele, Italy
- The William Harvey Research Institute, Queen Mary University of London, London EC1M 6BQ, UK
| | - Antonio Inforzato
- IRCCS Humanitas Research Hospital, 20089 Rozzano, Italy; (V.G.); (D.S.); (M.L.S.); (B.B.); (A.M.)
- Department of Biomedical Sciences, Humanitas University, 20072 Pieve Emanuele, Italy
| | - Cristina Sobacchi
- IRCCS Humanitas Research Hospital, 20089 Rozzano, Italy; (V.G.); (D.S.); (M.L.S.); (B.B.); (A.M.)
- Milan Unit, Institute for Genetic and Biomedical Research (IRGB), National Research Council (CNR), 20138 Milan, Italy
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Chen S, Han H, Sun X, Zhou G, Zhou Q, Li Z. Causal effects of specific gut microbiota on musculoskeletal diseases: a bidirectional two-sample Mendelian randomization study. Front Microbiol 2023; 14:1238800. [PMID: 37664120 PMCID: PMC10469765 DOI: 10.3389/fmicb.2023.1238800] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 08/03/2023] [Indexed: 09/05/2023] Open
Abstract
Background Recent observational studies and clinical trials demonstrated an association between gut microbiota and musculoskeletal (MSK) diseases. Nonetheless, whether the gut microbiota composition has a causal effect on the risk of MSK diseases remains unclear. Methods Based on large-scale genome-wide association studies (GWAS), we performed a two-sample Mendelian randomization (MR) analysis to investigate the causal relationship between gut microbiota and six MSK diseases, namely osteoporosis (OP), fracture, sarcopenia, low back pain (LBP), rheumatoid arthritis (RA), and ankylosing spondylitis (AS). Instrumental variables for 211 gut microbiota taxa were obtained from the largest available GWAS meta-analysis (n = 18,340) conducted by the MiBioGen consortium. And the summary-level data for six MSK diseases were derived from published GWAS. The inverse-variance weighted (IVW) method was conducted as a primary analysis to estimate the causal effect, and the robustness of the results was tested via sensitivity analyses using multiple methods. The Bonferroni-corrected test was used to determine the strength of the causal relationship between gut microbiota and various MSK diseases. Finally, a reverse MR analysis was applied to evaluate reverse causality. Results According to the IVW method, we found 57 suggestive causal relationships and 3 significant causal relationships between gut microbiota and MSK diseases. Among them, Genus Bifidobacterium (β: 0.035, 95% CI: 0.013-0.058, p = 0.0002) was associated with increased left handgrip strength, Genus Oxalobacter (OR: 1.151, 95% CI: 1.065-1.245, p = 0.0003) was correlated with an increased risk of LBP, and Family Oxalobacteraceae (OR: 0.792, 95% CI: 0.698-0.899, p = 0.0003) was linked with a decreased risk of RA. Subsequently, sensitivity analyses revealed no heterogeneity, directional pleiotropy, or outliers for the causal effect of specific gut microbiota on MSK diseases (p > 0.05). Reverse MR analysis showed fracture may result in a higher abundance of Family Bacteroidales (p = 0.030) and sarcopenia may lead to a higher abundance of Genus Sellimonas (p = 0.032). Conclusion Genetic evidence suggested a causal relationship between specific bacteria taxa and six MSK diseases, which highlights the association of the "gut-bone/muscle" axis. Further exploration of the potential microbiota-related mechanisms of bone and muscle metabolism might provide novel insights into the prevention and treatment of MSK diseases.
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Affiliation(s)
- Shuai Chen
- Department of Orthopaedics, The Second Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Huawei Han
- Department of Orthopaedics, The Second Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Xiaohe Sun
- Department of Oncology, Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Guowei Zhou
- Department of General Surgery, Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
| | - Qing Zhou
- Department of Ophthalmology, Children’s Hospital of Nanjing Medical University, Nanjing, China
| | - Zhiwei Li
- Department of Orthopaedics, The Second Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, China
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