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Harshan S, Dey P, Ragunathan S. Effects of rheumatoid arthritis associated transcriptional changes on osteoclast differentiation network in the synovium. PeerJ 2018; 6:e5743. [PMID: 30324023 PMCID: PMC6186409 DOI: 10.7717/peerj.5743] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 09/12/2018] [Indexed: 12/15/2022] Open
Abstract
Background Osteoclast differentiation in the inflamed synovium of rheumatoid arthritis (RA) affected joints leads to the formation of bone lesions. Reconstruction and analysis of protein interaction networks underlying specific disease phenotypes are essential for designing therapeutic interventions. In this study, we have created a network that captures signal flow leading to osteoclast differentiation. Based on transcriptome analysis, we have indicated the potential mechanisms responsible for the phenotype in the RA affected synovium. Method We collected information on gene expression, pathways and protein interactions related to RA from literature and databases namely Gene Expression Omnibus, Kyoto Encyclopedia of Genes and Genomes pathway and STRING. Based on these information, we created a network for the differentiation of osteoclasts. We identified the differentially regulated network genes and reported the signaling that are responsible for the process in the RA affected synovium. Result Our network reveals the mechanisms underlying the activation of the neutrophil cytosolic factor complex in connection to osteoclastogenesis in RA. Additionally, the study reports the predominance of the canonical pathway of NF-κB activation in the diseased synovium. The network also confirms that the upregulation of T cell receptor signaling and downregulation of transforming growth factor beta signaling pathway favor osteoclastogenesis in RA. To the best of our knowledge, this is the first comprehensive protein–protein interaction network describing RA driven osteoclastogenesis in the synovium. Discussion This study provides information that can be used to build models of the signal flow involved in the process of osteoclast differentiation. The models can further be used to design therapies to ameliorate bone destruction in the RA affected joints.
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Affiliation(s)
- Shilpa Harshan
- Institute of Bioinformatics and Applied Biotechnology, Bangalore, Karnataka, India
| | - Poulami Dey
- Institute of Bioinformatics and Applied Biotechnology, Bangalore, Karnataka, India.,Manipal Academy of Higher Education, Manipal, Karnataka, India
| | - Srivatsan Ragunathan
- Institute of Bioinformatics and Applied Biotechnology, Bangalore, Karnataka, India
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Abstract
The number of peer-reviewed articles published during the 2016 solar year and retrieved using the "autoimmunity" key word remained stable while gaining a minimal edge among the immunology articles. Nonetheless, the quality of the publications has been rising significantly and, importantly, acquisitions have become available through scientific journals dedicated to immunology or autoimmunity. Major discoveries have been made in the fields of systemic lupus erythematosus, rheumatoid arthritis, autoimmunity of the central nervous system, vasculitis, and seronegative spondyloarthrithritides. Selected examples include the role of IL17-related genes and long noncoding RNAs in systemic lupus erythematosus or the effects of anti-pentraxin 3 (PTX3) in the treatment of this paradigmatic autoimmune condition. In the case of rheumatoid arthritis, there have been reports of the role of induced regulatory T cells (iTregs) or fibrocytes and T cell interactions with exciting implications. The large number of studies dealing with neuroimmunology pointed to Th17 cells, CD56(bright) NK cells, and low-level TLR2 ligands as involved in multiple sclerosis, along with a high salt intake or the micriobiome-derived Lipid 654. Lastly, we focused on the rare vasculitides to which numerous studies were devoted and suggested that unsuspected cell populations, including monocytes, mucosal-associated invariant T cells, and innate lymphoid cells, may be crucial to ANCA-associated manifestations. This brief and arbitrary discussion of the findings published in 2016 is representative of a promising background for developments that will enormously impact the work of laboratory scientists and physicians at an exponential rate.
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Affiliation(s)
- Carlo Selmi
- Division of Rheumatology and Clinical Immunology, Humanitas Research Hospital, via A. Manzoni 56, 20089, Rozzano, Milan, Italy.
- Department of Medical Biotechnologies and Translational Medicine (BIOMETRA), University of Milan, Milan, Italy.
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Cui Y, Zhao X, Mei L, Pei J, Wang S, Shao Y, Tao Y, Zhang X, Jiang L. Osteon Myospalacem Baileyi attenuates osteoclast differentiation through RANKL induced NFAT pathways. JOURNAL OF ETHNOPHARMACOLOGY 2018; 213:65-71. [PMID: 29107144 DOI: 10.1016/j.jep.2017.10.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 10/05/2017] [Accepted: 10/09/2017] [Indexed: 06/07/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Osteon Myospalacem Baileyi, known as Sai long gu (Tibetan language, means "blind rat bone"), is the whole skeleton of Tibet plateau rodentia animal Myospalacem Baileyi. Osteon Myospalacem Baileyi had been widely used in the Tibet region as an anti-osteoporosis drug and since 1991 Osteon Myospalacem Baileyi has been listed in the Pharmacopoeia of People's Republic of China as the first-class animal new medical material. However, the mechanism of its anti-osteoporosis activities is still unclear. It is very desirable to solve this problem for further study. MATERIALS AND METHODS in this study, preparative chromatography was employed to produce the active fraction ET4 from Osteon Myospalacem Baileyi crude. Flow cytometry and MTT assay were used to evaluate the toxicities of ET4. BMM cells were separated from mouse bone marrow to test the inhibition effects of ET4 on osteoclastogenesis. Western blot was used to find out the pathways, through which ET4 could act on osteoclastogenesis. Q-PCR was used to test the osteoclastogenesis marker genes. At last, immunofluorescence confocal microscopy was used to test the osteoclastogenesis master protein NFATc1 nuclei translocation. RESULTS In this study we report that ET4, at the dose of 60μg/mL, significantly inhibited the formation of osteoclasts. Notably, ET4 did not affect the BMM viability at that dose. In addition, Osteon Myospalacem Baileyi could inhibit the expression of osteoclast marker genes, including cathepsin K (CTSK), nuclear factor of activated T cells cytoplasmic 1 (NFATc1), tartrate resistant acid phosphatase (TRAP, Acp5) dendrite cell-specific transmembrane protein (DC-STAMP), calcitonin receptor (CTR), osteoclast associated and immunoglobulin-like receptor (OSCAR). Mechanistically, ET4 dose- and time-dependently blocked the RANKL-induced activation of ERK and c-Fos as well as the induction of NFATc1 which is essential for OC formation. CONCLUSIONS These data suggest that ET4 might be a useful alternative therapy in preventing or treating osteolytic diseases.
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Affiliation(s)
- Yulei Cui
- Key Laboratory of Tibetan Medicine Research, Northwest Plateau Institute of Biology, Chinese Academy of Sciences, Xining 810001, China; University of Chinese Academy of Sciences, Beijing 100039, China
| | - Xiaoying Zhao
- The Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Jiao Tong University School of Medicine (SJTUSM) & Shanghai Institutes for Biological Sciences (SIBS), Chinese Academy of Sciences (CAS), Shanghai 200025, China; Department of Orthopedic Surgery, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (SJTUSM), Shanghai 200092, China
| | - Lijuan Mei
- Key Laboratory of Tibetan Medicine Research, Northwest Plateau Institute of Biology, Chinese Academy of Sciences, Xining 810001, China
| | - Jinjin Pei
- Key Laboratory of Tibetan Medicine Research, Northwest Plateau Institute of Biology, Chinese Academy of Sciences, Xining 810001, China; Shaanxi Key Laboratory of Bioresources and Biology, Shaanxi University of Technology, Hanzhong 723001, China
| | - Shuo Wang
- Key Laboratory of Tibetan Medicine Research, Northwest Plateau Institute of Biology, Chinese Academy of Sciences, Xining 810001, China; University of Chinese Academy of Sciences, Beijing 100039, China
| | - Yun Shao
- Key Laboratory of Tibetan Medicine Research, Northwest Plateau Institute of Biology, Chinese Academy of Sciences, Xining 810001, China
| | - Yanduo Tao
- Key Laboratory of Tibetan Medicine Research, Northwest Plateau Institute of Biology, Chinese Academy of Sciences, Xining 810001, China
| | - Xiaoling Zhang
- The Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Jiao Tong University School of Medicine (SJTUSM) & Shanghai Institutes for Biological Sciences (SIBS), Chinese Academy of Sciences (CAS), Shanghai 200025, China; Department of Orthopedic Surgery, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (SJTUSM), Shanghai 200092, China
| | - Lei Jiang
- Key Laboratory of Tibetan Medicine Research, Northwest Plateau Institute of Biology, Chinese Academy of Sciences, Xining 810001, China.
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Micro-structural bone changes in early rheumatoid arthritis persist over 1-year despite use of disease modifying anti-rheumatic drug therapy. BMC Musculoskelet Disord 2017; 18:521. [PMID: 29228959 PMCID: PMC5725933 DOI: 10.1186/s12891-017-1888-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 12/01/2017] [Indexed: 12/30/2022] Open
Abstract
Background We used High Resolution – peripheral Quantitative CT (HR-pQCT) imaging to examine peri-articular bone quality in early rheumatoid arthritis (RA) and explore whether bone quality improved over 12-months in individuals receiving care consistent with practice guidelines. Methods A 1-year longitudinal cohort study (Baseline and 12-months) evaluating individuals with early RA compared to age/sex-matched peers. Personal demographic and health and lifestyle information were collected for all. Whereas, active joint count (AJC28), functional limitation, and RA medications were also collected for RA participants. HR-pQCT imaging analyses quantified bone density and microstructure in the Metacarpal Head (MH) and Ultra-Ultra-Distal (UUD) radius at baseline and 12-months. Analyses included a General Linear Modelling repeated measures analyses examined main effects for disease, time, and interaction on bone quality. Results Participants (n = 60, 30 RA/30 NRA); 80% female, mean age 53 (varying from 21 to 74 years). At baseline, RA participants were on average 7.7 months since diagnosis, presenting with few active joints (AJC28: 30% none, remaining 70% Median 4 active joints) and minimal self-reported functional limitation (mHAQ-DI0–3: 0.56). At baseline, 29 of 30 RA participants had received one or more non-biologic disease-modifying anti-rheumatic drugs (DMARD);13 in combination with glucocorticoid and 1 in combination with a biologic medication. One participant only received glucocorticoid medication. Four RA participants withdrew leaving 26 pairs (n = 52) at 12-months; 23 pairs (n = 46) with UUD and 22 pairs (n = 44) with MH baseline and 12-month images to compare. Notable RA/NRA differences (p < 0.05) in bone quality at all three sites included lower trabecular bone density and volume, more rod-like trabeculae, and larger and more variable spaces between trabeculae; fewer trabeculae at the UUD and MH2 sites; and lower cortical bone density and volume in the MH sites. Rate of change over 12-months did not differ between RA/NRA participants which meant there was also no improvement over the year in RA bone quality. Conclusions Early changes in peri-articular bone density and microstructure seen in RA are consistent with changes more commonly seen in aging bone and are slow or resistant to recover despite well controlled inflammatory joint symptoms with early DMARD therapy. Electronic supplementary material The online version of this article (10.1186/s12891-017-1888-3) contains supplementary material, which is available to authorized users.
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Zhao X, Mei L, Pei J, Liu Z, Shao Y, Tao Y, Zhang X, Jiang L. Sophoridine from Sophora Flower Attenuates Ovariectomy Induced Osteoporosis through the RANKL-ERK-NFAT Pathway. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:9647-9654. [PMID: 29058425 DOI: 10.1021/acs.jafc.7b03666] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
An imbalance in osteogenesis and osteoclastogenesis is a crucial pathological factor in the development of osteoporosis. Osteoclasts (OCs) play a pivotal role in osteoporosis, whose new therapy exploration has been focused on the suppression of OC formation. Sophoridine is found from the Chinese traditional food sophora flower to exhibit anti-osteoporosis capacity by screening. This study is focused on its anti-osteoporosis mechanism evaluation. The anti-osteoporosis effect of sophoridine, (15 mg kg-1 body), was evaluated in ovariectomized (OVX) mice by monitoring changes in bone histomorphometry index, formation of osteoclasts from blood-derived mononuclear cells, and changes in the synthesis of pro-osteoclastogenic cytokines. Signal pathways were investigated by QPCR, Western blot, and immunofluorescence. Sophoridine has a significant anti-osteoporosis effect in vivo, which can inhibit RANKL-induced OC formation, the appearance of OC-specific marker genes, and OC marker protein in vitro. Mechanistically, sophoridine dose- and time-dependently blocks the RANKL-induced OC formation and the activation of ERK and c-Fos as well as the induction and nucleus translocation of NFATc1. Sophora flower might be a useful alternative functional food in preventing or treating osteoporosis.
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Affiliation(s)
- Xiaoying Zhao
- The Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Jiao Tong University School of Medicine (SJTUSM) & Shanghai Institutes for Biological Sciences (SIBS), Chinese Academy of Sciences (CAS) , Shanghai 200025, China
- Department of Orthopedic Surgery, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (SJTUSM) , Shanghai 200092, China
| | - Lijuan Mei
- Key Laboratory of Tibetan Medicine Research, Northwest Plateau Institute of Biology, Chinese Academy of Sciences , Xining 810001, P. R. China
| | - Jinjin Pei
- Key Laboratory of Tibetan Medicine Research, Northwest Plateau Institute of Biology, Chinese Academy of Sciences , Xining 810001, P. R. China
- Shaanxi Key Laboratory of Bioresources and Biology, Shaanxi University of Technology , Hanzhong 723001, P. R. China
| | - Zenggen Liu
- Key Laboratory of Tibetan Medicine Research, Northwest Plateau Institute of Biology, Chinese Academy of Sciences , Xining 810001, P. R. China
| | - Yun Shao
- Key Laboratory of Tibetan Medicine Research, Northwest Plateau Institute of Biology, Chinese Academy of Sciences , Xining 810001, P. R. China
| | - Yanduo Tao
- Key Laboratory of Tibetan Medicine Research, Northwest Plateau Institute of Biology, Chinese Academy of Sciences , Xining 810001, P. R. China
| | - Xiaoling Zhang
- The Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Jiao Tong University School of Medicine (SJTUSM) & Shanghai Institutes for Biological Sciences (SIBS), Chinese Academy of Sciences (CAS) , Shanghai 200025, China
- Department of Orthopedic Surgery, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (SJTUSM) , Shanghai 200092, China
| | - Lei Jiang
- Key Laboratory of Tibetan Medicine Research, Northwest Plateau Institute of Biology, Chinese Academy of Sciences , Xining 810001, P. R. China
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Kim M, Yoo SJ, Kang SW, Kwon J, Choi I, Lee CH. TNFα and IL-1β in the synovial fluid facilitate mucosal-associated invariant T (MAIT) cell migration. Cytokine 2017; 99:91-98. [DOI: 10.1016/j.cyto.2017.07.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 07/05/2017] [Accepted: 07/12/2017] [Indexed: 12/17/2022]
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Daily chemical evodiamine from Chinese prickly ash attenuates osteoclast differentiation through RANKL induced NFAT pathways. J Funct Foods 2017. [DOI: 10.1016/j.jff.2017.07.042] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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Generali E, Ceribelli A, Stazi MA, Selmi C. Lessons learned from twins in autoimmune and chronic inflammatory diseases. J Autoimmun 2017; 83:51-61. [PMID: 28431796 DOI: 10.1016/j.jaut.2017.04.005] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Accepted: 04/10/2017] [Indexed: 12/16/2022]
Abstract
Autoimmunity and chronic inflammation recognize numerous shared factors and, as a result, the resulting diseases frequently coexist in the same patients or respond to the same treatments. Among the convenient truths of autoimmune and chronic inflammatory diseases, there is now agreement that these are complex conditions in which the individual genetic predisposition provides a rate of heritability. The concordance rates in monozygotic and dizygotic twins allows to estimate the weight of the environment in determining disease susceptibility, despite recent data supporting that only a minority of immune markers depend on hereditary factors. Concordance rates in monozygotic and dizygotic twins should be evaluated over an observation period to minimize the risk of false negatives and this is well represented by type I diabetes mellitus. Further, concordance rates in monozygotic twins should be compared to those in dizygotic twins, which share 50% of their genes, as in regular siblings, but also young-age environmental factors. Twin studies have been extensively performed in several autoimmune conditions and cumulatively suggest that some diseases, i.e. celiac disease and psoriasis, are highly genetically determined, while rheumatoid arthritis or systemic sclerosis have a limited role for genetics. These observations are necessary to interpret data gathered by genome-wide association studies of polymorphisms and DNA methylation in MZ twins. New high-throughput technological platforms are awaited to provide new insights into the mechanisms of disease discordance in twins beyond strong associations such as those with HLA alleles.
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Affiliation(s)
- Elena Generali
- Division of Rheumatology and Clinical Immunology, Humanitas Research Hospital, Rozzano, Milan, Italy
| | - Angela Ceribelli
- Division of Rheumatology and Clinical Immunology, Humanitas Research Hospital, Rozzano, Milan, Italy
| | - Maria Antonietta Stazi
- Italian Twin Registry, Centre for Behavioural Sciences and Mental Health, Istituto Superiore di Sanità, Rome, Italy
| | - Carlo Selmi
- Division of Rheumatology and Clinical Immunology, Humanitas Research Hospital, Rozzano, Milan, Italy; BIOMETRA Department, University of Milan, Milan, Italy.
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Joost I, Kaasch A, Pausch C, Peyerl-Hoffmann G, Schneider C, Voll RE, Seifert H, Kern WV, Rieg S. Staphylococcus aureus bacteremia in patients with rheumatoid arthritis - Data from the prospective INSTINCT cohort. J Infect 2017; 74:575-584. [PMID: 28322887 DOI: 10.1016/j.jinf.2017.03.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 02/11/2017] [Accepted: 03/08/2017] [Indexed: 11/29/2022]
Abstract
OBJECTIVES Patients with rheumatoid arthritis (RA) are considered to be at increased risk of severe infections. We here describe the clinical characteristics, course and outcome of RA patients with Staphylococcus aureus bacteremia (SAB). METHODS We conducted a post hoc analysis of data from a German bi-center prospective SAB cohort study (period 2006-2014). Patients were followed-up for one year. Primary and secondary outcomes were survival time and osteoarticular infection (OAI). RESULTS A total of 1069 patients with SAB were analyzed, with 31 patients suffering from RA. RA patients showed significantly more often OAI (15/31 patients, 48% vs. 152/1038, 15%), disseminated infection (12/31, 39% vs. 164/1038, 16%) and severe sepsis/septic shock (12/31, 39% vs. 235/1038, 23%). Day-30 mortality in RA patients was 36% (vs. 19% in non-RA patients, p = 0.034), and day 90 mortality was 58% (vs. 32%, p = 0.003). Multivariate analyses confirmed RA to be an independent risk factor for death (HR 2.3, 95% CI 1.4-3.7) and OAI (OR 4.2, 95% CI 1.8-9.8). CONCLUSIONS Patients with RA exhibit a complicated SAB course and a high mortality, their management is challenging. Adequate antibiotic treatment, prompt invasive diagnostic and therapeutic procedures like joint lavage or surgery are of pivotal importance. Joint damage due to RA may confer a higher risk of acquiring OAI than immunosuppression.
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Affiliation(s)
- Insa Joost
- Division of Infectious Diseases, Department of Medicine II, University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, Hugstetter Str. 55, 79106, Germany.
| | - Achim Kaasch
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Goldenfelsstr. 19, 50937, Cologne, Germany
| | - Christine Pausch
- Institute for Medical Informatics, Statistics and Epidemiology, University of Leipzig, Härtelstraße 16-18, 04107, Leipzig, Germany
| | - Gabriele Peyerl-Hoffmann
- Division of Infectious Diseases, Department of Medicine II, University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, Hugstetter Str. 55, 79106, Germany
| | - Christian Schneider
- Institute of Microbiology and Hygiene, University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, Hugstetter Str. 55, 79106, Germany
| | - Reinhard E Voll
- Department of Rheumatology and Clinical Immunology, University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany
| | - Harald Seifert
- Institute for Medical Microbiology, Immunology and Hygiene, University of Cologne, Goldenfelsstr. 19, 50937, Cologne, Germany; German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, Germany
| | - Winfried V Kern
- Division of Infectious Diseases, Department of Medicine II, University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, Hugstetter Str. 55, 79106, Germany
| | - Siegbert Rieg
- Division of Infectious Diseases, Department of Medicine II, University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, Hugstetter Str. 55, 79106, Germany; Center for Chronic Immunodeficiency, University Medical Center Freiburg, Faculty of Medicine, University of Freiburg, Hugstetter Str. 55, 79106, Germany.
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Lim VY, Zehentmeier S, Fistonich C, Pereira JP. A Chemoattractant-Guided Walk Through Lymphopoiesis: From Hematopoietic Stem Cells to Mature B Lymphocytes. Adv Immunol 2017; 134:47-88. [PMID: 28413023 DOI: 10.1016/bs.ai.2017.02.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
B lymphocytes develop from hematopoietic stem cells (HSCs) in specialized bone marrow niches composed of rare mesenchymal lineage stem/progenitor cells (MSPCs) and sinusoidal endothelial cells. These niches are defined by function and location: MSPCs are mostly perisinusoidal cells that together with a small subset of sinusoidal endothelial cells express stem cell factor, interleukin-7 (IL-7), IL-15, and the highest amounts of CXCL12 in bone marrow. Though rare, MSPCs are morphologically heterogeneous, highly reticular, and form a vast cellular network in the bone marrow parenchyma capable of interacting with large numbers of hematopoietic cells. HSCs, downstream multipotent progenitor cells, and common lymphoid progenitor cells utilize CXCR4 to fine-tune access to critical short-range growth factors provided by MSPCs for their long-term maintenance and/or multilineage differentiation. In later stages, developing B lymphocytes use CXCR4 to navigate the bone marrow parenchyma, and predominantly cannabinoid receptor-2 for positioning within bone marrow sinusoids, prior to being released into peripheral blood circulation. In the final stages of differentiation, transitional B cells migrate to the spleen where they preferentially undergo further rounds of differentiation until selection into the mature B cell pool occurs. This bottleneck purges up to 97% of all developing B cells in a peripheral selection process that is heavily controlled not only by the intensity of BCR signaling and access to BAFF but also by the proper functioning of the B cell motility machinery.
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Affiliation(s)
- Vivian Y Lim
- Yale University School of Medicine, New Haven, CT, United States
| | | | - Chris Fistonich
- Yale University School of Medicine, New Haven, CT, United States
| | - João P Pereira
- Yale University School of Medicine, New Haven, CT, United States.
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Matsuura T, Ichinose S, Akiyama M, Kasahara Y, Tachikawa N, Nakahama KI. Involvement of CX3CL1 in the Migration of Osteoclast Precursors Across Osteoblast Layer Stimulated by Interleukin-1ß. J Cell Physiol 2017; 232:1739-1745. [PMID: 27579490 DOI: 10.1002/jcp.25577] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Accepted: 08/24/2016] [Indexed: 12/25/2022]
Abstract
The trigger for bone remodeling is bone resorption by osteoclasts. Osteoclast differentiation only occurs on the old bone, which needs to be repaired under physiological conditions. However, uncontrolled bone resorption is often observed in pro-inflammatory bone diseases, such as rheumatoid arthritis. Mature osteoclasts are multinuclear cells that differentiate from monocyte/macrophage lineage cells by cell fusion. Although Osteoclast precursors should migrate across osteoblast layer to reach bone matrix before maturation, the underlying mechanisms have not yet been elucidated in detail. We herein found that osteoclast precursors utilize two routes to migrate across osteoblast layer by confocal- and electro-microscopic observations. The osteoclast supporting activity of osteoblasts inversely correlated with osteoblast density and was positively related to the number of osteoclast precursors under the osteoblast layer. Osteoclast differentiation was induced by IL-1ß, but not by PGE2 in high-density osteoblasts. Osteoblasts and osteoclast precursors expressed CX3CL1 and CX3CR1, respectively, and the expression of CX3CL1 increased in response to interleukin-1ß. An anti-CX3CL1-neutralizing antibody inhibited the migration of osteoclast precursors and osteoclast differentiation. These results strongly suggest the involvement of CX3CL1 in the migration of osteoclast precursors and osteoclastogenesis, and will contribute to the development of new therapies for bone diseases. J. Cell. Physiol. 232: 1739-1745, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Tsuyoshi Matsuura
- Department of Cellular Physiological Chemistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan.,Oral Implantology and Regenerative Dental Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Shizuko Ichinose
- Research Center for Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Masako Akiyama
- Department of Cellular Physiological Chemistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Yuki Kasahara
- Department of Cellular Physiological Chemistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Noriko Tachikawa
- Oral Implantology and Regenerative Dental Medicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
| | - Ken-Ichi Nakahama
- Department of Cellular Physiological Chemistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan
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