8
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Gut microbiome and osteoporosis : a review

      research-article
      , MD 1 , , MD 1 , , PhD, MD 1 , , PhD, MD 1 , , PhD, MD 1 , , PhD, MD 1
      Bone & Joint Research
      The British Editorial Society of Bone & Joint Surgery
      Osteoporosis, Gut, Microbiota, Treatment

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Osteoporosis (OP) is a chronic metabolic bone disease characterized by the decrease of bone tissue per unit volume under the combined action of genetic and environmental factors, which leads to the decrease of bone strength, makes the bone brittle, and raises the possibility of bone fracture. However, the exact mechanism that determines the progression of OP remains to be underlined. There are hundreds of trillions of symbiotic bacteria living in the human gut, which have a mutually beneficial symbiotic relationship with the human body that helps to maintain human health. With the development of modern high-throughput sequencing (HTS) platforms, there has been growing evidence that the gut microbiome may play an important role in the programming of bone metabolism. In the present review, we discuss the potential mechanisms of the gut microbiome in the development of OP, such as alterations of bone metabolism, bone mineral absorption, and immune regulation. The potential of gut microbiome-targeted strategies in the prevention and treatment of OP was also evaluated.

          Cite this article: Bone Joint Res 2020;9(8):524–530.

          Related collections

          Most cited references42

          • Record: found
          • Abstract: found
          • Article: not found

          Sex steroid deficiency-associated bone loss is microbiota dependent and prevented by probiotics.

          A eubiotic microbiota influences many physiological processes in the metazoan host, including development and intestinal homeostasis. Here, we have shown that the intestinal microbiota modulates inflammatory responses caused by sex steroid deficiency, leading to trabecular bone loss. In murine models, sex steroid deficiency increased gut permeability, expanded Th17 cells, and upregulated the osteoclastogenic cytokines TNFα (TNF), RANKL, and IL-17 in the small intestine and the BM. In germ-free (GF) mice, sex steroid deficiency failed to increase osteoclastogenic cytokine production, stimulate bone resorption, and cause trabecular bone loss, demonstrating that the gut microbiota is central in sex steroid deficiency-induced trabecular bone loss. Furthermore, we demonstrated that twice-weekly treatment of sex steroid-deficient mice with the probiotics Lactobacillus rhamnosus GG (LGG) or the commercially available probiotic supplement VSL#3 reduces gut permeability, dampens intestinal and BM inflammation, and completely protects against bone loss. In contrast, supplementation with a nonprobiotic strain of E. coli or a mutant LGG was not protective. Together, these data highlight the role that the gut luminal microbiota and increased gut permeability play in triggering inflammatory pathways that are critical for inducing bone loss in sex steroid-deficient mice. Our data further suggest that probiotics that decrease gut permeability have potential as a therapeutic strategy for postmenopausal osteoporosis.
            Bookmark
            • Record: found
            • Abstract: found
            • Article: not found

            Fecal microbiota transplantation and emerging applications.

            Fecal microbiota transplantation (FMT) has been utilized sporadically for over 50 years. In the past few years, Clostridium difficile infection (CDI) epidemics in the USA and Europe have resulted in the increased use of FMT, given its high efficacy in eradicating CDI and associated symptoms. As more patients request treatment and more clinics incorporate FMT into their treatment repertoire, reports of applications outside of CDI are emerging, paving the way for the use of FMT in several idiopathic conditions. Interest in this therapy has largely been driven by new research into the gut microbiota, which is now beginning to be appreciated as a microbial human organ with important roles in immunity and energy metabolism. This new paradigm raises the possibility that many diseases result, at least partially, from microbiota-related dysfunction. This understanding invites the investigation of FMT for several disorders, including IBD, IBS, the metabolic syndrome, neurodevelopmental disorders, autoimmune diseases and allergic diseases, among others. The field of microbiota-related disorders is currently in its infancy; it certainly is an exciting time in the burgeoning science of FMT and we expect to see new and previously unexpected applications in the near future. Well-designed and well-executed randomized trials are now needed to further define these microbiota-related conditions.
              Bookmark
              • Record: found
              • Abstract: found
              • Article: not found

              Autonomic innervation and regulation of the immune system (1987-2007).

              Since 1987, only a few neuroanatomical studies have been conducted to identify the origin of innervation for the immune system. These studies demonstrated that all primary and secondary immune organs receive a substantial sympathetic innervation from sympathetic postganglionic neurons. Neither the thymus nor spleen receive any sensory neural innervation; however, there is evidence that lymph nodes and bone marrow may be innervated by sensory neurons located in dorsal root ganglia. There is no neuroanatomical evidence for a parasympathetic or vagal nerve supply to any immune organ. Thus, the primary pathway for the neural regulation of immune function is provided by the sympathetic nervous system (SNS) and its main neurotransmitter, norepinephrine (NE). Activation of the SNS primarily inhibits the activity of cells associated with the innate immune system, while it either enhances or inhibits the activity of cells associated with the acquired/adaptive immune system. Innate immune cells express both alpha and beta-adrenergic receptor subtypes, while T and B lymphocytes express adrenergic receptors of the beta2 subtype exclusively, except for murine Th2 cells that lack expression of any subtype. Via these adrenergic receptors, NE is able to regulate the level of immune cell activity by initiating a change in the level of cellular activity, which often involves a change in the level of gene expression for cytokines and antibodies.
                Bookmark

                Author and article information

                Contributors
                Role: Orthopaedic Surgeon
                Role: Orthopaedic Surgeon
                Role: Orthopaedic Surgeon
                Role: Orthopaedic Surgeon
                Role: Professor
                Role: Orthopaedic Surgeon
                Journal
                Bone Joint Res
                Bone Joint Res
                bjr
                Bone & Joint Research
                The British Editorial Society of Bone & Joint Surgery (London )
                2046-3758
                August 2020
                2 August 2020
                : 9
                : 8
                : 524-530
                Affiliations
                [1 ]org-divisionDepartment of Orthopaedic Surgery, The First Affiliated Hospital of Soochow University , Suzhou, China
                Author notes
                Correspondence should be sent to Bin Meng. E-mail: mengbinspine@ 123456163.com

                S. Li and Y. Mao contributed equally to this work.

                Article
                BJR-9-524
                10.1302/2046-3758.98.BJR-2020-0089.R1
                7468557
                32922760
                127bb625-90db-42c9-a09a-02db0875396e
                © 2020 Author(s) et al.

                This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives (CC BY-NC-ND 4.0) licence, which permits the copying and redistribution of the work only, and provided the original author and source are credited.

                History
                Categories
                Bone Biology
                bone-biology, Bone Biology
                Custom metadata
                First Affiliated Hospital of Soochow University, Suzhou, China

                osteoporosis,gut,microbiota,treatment
                osteoporosis, gut, microbiota, treatment

                Comments

                Comment on this article