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Krishnan RH, Sadu L, Das UR, Satishkumar S, Pranav Adithya S, Saranya I, Akshaya R, Selvamurugan N. Role of p300, a histone acetyltransferase enzyme, in osteoblast differentiation. Differentiation 2022; 124:43-51. [DOI: 10.1016/j.diff.2022.02.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 02/03/2022] [Accepted: 02/04/2022] [Indexed: 12/21/2022]
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Villegas-Ospina S, Aguilar-Jimenez W, Gonzalez SM, Rugeles MT. Vitamin D modulates the expression of HLA-DR and CD38 after in vitro activation of T-cells. Horm Mol Biol Clin Investig 2017; 29:93-103. [PMID: 28222027 DOI: 10.1515/hmbci-2016-0037] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2016] [Accepted: 12/29/2016] [Indexed: 12/23/2022]
Abstract
OBJECTIVE Vitamin D (VitD) is an anti-inflammatory hormone; however, some evidence shows that VitD may induce the expression of activation markers, such as CD38 and HLA-DR. We explored its effect on the expression of these markers on CD4+ and CD8+ T-cells in vitro, and their potential correlations in vivo. MATERIALS AND METHODS CD38 and HLA-DR expression was measured by flow cytometry in PHA/IL-2-activated mononuclear cells cultured under VitD precursors: three cholecalciferol (10-11M, 10-9M, 10-7M; n=11) and two calcidiol (40 ng/mL, 80 ng/mL; n=9) concentrations. The correlation between the expression of these markers in freshly isolated blood cells and serum levels of calcidiol was also explored (n=10). RESULTS Cholecalciferol at 10-7M increased the proportion of CD4+ CD38+ and CD8+ CD38+ cells, and decreased CD8+HLA-DR+ cells. As co-expression, it increased the CD38+HLA-DR- and decreased CD38-HLA-DR+ subpopulations in both CD4+ and CD8+ T-cells, and decreased CD4+CD38-HLA-DR- and CD8+ CD38+HLA-DR+; whereas both calcidiol concentrations decreased the proliferation of CD38-HLA-DR- and CD38-HLA-DR+ subpopulations. Both forms of VitD increased the number of CD38 molecules per cell. In contrast, there was a positive but non-significant correlation between serum calcidiol levels and the expression of CD38 and HLA-DR in CD4+ and CD8+ T-cells. CONCLUSION Although no significant correlations were observed in vivo in healthy subjects, VitD treatment in vitro modulated immune activation by increasing the expression of CD38 and decreasing the proliferation of HLA-DR+ and resting cells, which may correlate with improved effector and decreased proliferative capabilities. These results highlight the potential use of VitD as therapeutic strategy in immune disorders.
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Notomi T, Kuno M, Hiyama A, Ezura Y, Honma M, Ishizuka T, Ohura K, Yawo H, Noda M. Membrane depolarization regulates intracellular RANKL transport in non-excitable osteoblasts. Bone 2015. [PMID: 26211991 DOI: 10.1016/j.bone.2015.07.031] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Parathyroid hormone (PTH) and 1α,25-dihydroxyvitamin D3 (VD3) are important factors in Ca(2+) homeostasis, and promote osteoclastogenesis by modulating receptor activator of nuclear factor kappa-B ligand (RANKL) mRNA expression. However, their contribution to RANKL intracellular transport (RANKLiT), including the trigger for RANKL lysosomal vesicle (RANKL-lv) fusion to the cell membrane, is unclear. In neurons, depolarization of membrane potential increases the intracellular Ca(2+) level ([Ca(2+)]i) and promotes neurotransmitter release via fusion of the synaptic vesicles to the cell membrane. To determine whether membrane depolarization also regulates cellular processes such as RANKLiT in MC3T3-E1 osteoblasts (OBs), we generated a light-sensitive OB cell line and developed a system for altering their membrane potential via delivery of a blue light stimulus. In the membrane fraction of RANKL-overexpressing OBs, PTH and VD3 increased the membrane-bound RANKL (mbRANKL) level at 10 min after application without affecting the mRNA expression level, and depolarized the cell membrane while transiently increasing [Ca(2+)]i. In our novel OB line stably expressing the channelrhodopsin-wide receiver, blue light-induced depolarization increased the mbRANKL level, which was reversed by treatment of blockers for L-type voltage-gated Ca(2+) channels and Ca(2+) release from the endoplasmic reticulum. In co-cultures of osteoclast precursor-like RAW264.7 cells and light-sensitive OBs overexpressing RANKL, light stimulation induced an increase in tartrate-resistant acid phosphatase activity and promoted osteoclast differentiation. These results indicate that depolarization of the cell membrane is a trigger for RANKL-lv fusion to the membrane and that membrane potential contributes to the function of OBs. In addition, the non-genomic action of VD3-induced RANKL-lv fusion included the membrane-bound VD3 receptor (1,25D3-MARRS receptor). Elucidating the mechanism of RANKLiT regulation by PTH and VD3 will be useful for the development of drugs to prevent bone loss in osteoporosis and other bone diseases.
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Affiliation(s)
- Takuya Notomi
- Department of Pharmacology, Osaka Dental University, 8-1 Kuzuhahanazono-cho, Hirakata, Osaka 573-1121, Japan; Department of Molecular Pharmacology, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo, Tokyo 113-8510, Japan; Global Center of Excellence Program for Molecular Science for Tooth and Bone Diseases, Tokyo Medical and Dental University, Tokyo, Japan; Department of Physiology, Graduate School of Medicine, Osaka City University, 1-4-3 Asahimachi, Abeno, Osaka 545-8585, Japan.
| | - Miyuki Kuno
- Department of Physiology, Graduate School of Medicine, Osaka City University, 1-4-3 Asahimachi, Abeno, Osaka 545-8585, Japan
| | - Akiko Hiyama
- Department of Pharmacology, Osaka Dental University, 8-1 Kuzuhahanazono-cho, Hirakata, Osaka 573-1121, Japan
| | - Yoichi Ezura
- Department of Molecular Pharmacology, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo, Tokyo 113-8510, Japan
| | - Masashi Honma
- Department of Pharmacy, The University of Tokyo Hospital, Faculty of Medicine, The University of Tokyo, Tokyo 113-8655, Japan
| | - Toru Ishizuka
- Department of Developmental Biology and Neuroscience, Tohoku University Graduate School of Life Sciences, Sendai 980-8577, Japan
| | - Kiyoshi Ohura
- Department of Pharmacology, Osaka Dental University, 8-1 Kuzuhahanazono-cho, Hirakata, Osaka 573-1121, Japan
| | - Hiromu Yawo
- Department of Developmental Biology and Neuroscience, Tohoku University Graduate School of Life Sciences, Sendai 980-8577, Japan
| | - Masaki Noda
- Department of Molecular Pharmacology, Medical Research Institute, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo, Tokyo 113-8510, Japan; Global Center of Excellence Program for Molecular Science for Tooth and Bone Diseases, Tokyo Medical and Dental University, Tokyo, Japan.
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Poon CCW, Li RWS, Seto SW, Kong SK, Ho HP, Hoi MPM, Lee SMY, Ngai SM, Chan SW, Leung GPH, Kwan YW. In vitro vitamin K(2) and 1α,25-dihydroxyvitamin D(3) combination enhances osteoblasts anabolism of diabetic mice. Eur J Pharmacol 2015; 767:30-40. [PMID: 26452518 DOI: 10.1016/j.ejphar.2015.09.048] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Revised: 09/25/2015] [Accepted: 09/29/2015] [Indexed: 12/20/2022]
Abstract
In this study, we evaluated the anabolic effect and the underlying cellular mechanisms involved of vitamin K2 (10 nM) and 1α,25-dihydroxyvitamin D3 (1,25(OH)2D3) (10 nM), alone and in combination, on primary osteoblasts harvested from the iliac crests of C57BL/KsJ lean (+/+) and obese/diabetic (db/db) mice. A lower alkaline phosphatase (ALP) activity plus a reduced expression of bone anabolic markers and bone formation transcription factors (osteocalcin, Runx2, Dlx5, ATF4 and OSX) were consistently detected in osteoblasts of db/db mice compared to lean mice. A significantly higher calcium deposits formation in osteoblasts was observed in lean mice when compared to db/db mice. Co-administration of vitamin K2 (10 nM) and 1,25(OH)2D3 (10 nM) caused an enhancement of calcium deposits in osteoblasts in both strains of mice. Vitamins K2 and 1,25(OH)2D3 co-administration time-dependently (7, 14 and 21 days) increased the levels of bone anabolic markers and bone formation transcription factors, with a greater magnitude of increase observed in osteoblasts of db/db mice. Combined vitamins K2 plus 1,25(OH)2D3 treatment significantly enhanced migration and the re-appearance of surface microvilli and ruffles of osteoblasts of db/db mice. Thus, our results illustrate that vitamins K2 plus D3 combination could be a novel therapeutic strategy in treating diabetes-associated osteoporosis.
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Affiliation(s)
- Christina C W Poon
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong
| | - Rachel W S Li
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong; Department of Pharmacology and Pharmacy, Faculty of Medicine, The University of Hong Kong, Hong Kong
| | - Sai Wang Seto
- National Institute of Complementary Medicine, School of Science and Health, University of Western Sydney, Locked Bag 1797, Penrith, NSW 2751, Australia
| | - Siu Kai Kong
- School of Life Sciences, Faculty of Science, The Chinese University of Hong Kong, Hong Kong
| | - Ho Pui Ho
- Department of Electronic Engineering, Faculty of Engineering, The Chinese University of Hong Kong, Hong Kong
| | - Maggie P M Hoi
- Institute of Chinese Medical Sciences, The University of Macau, Macau, China
| | - Simon M Y Lee
- Institute of Chinese Medical Sciences, The University of Macau, Macau, China
| | - Sai Ming Ngai
- School of Life Sciences, Faculty of Science, The Chinese University of Hong Kong, Hong Kong
| | - Shun Wan Chan
- State Key Laboratory of Chinese Medicine and Molecular Pharmacology, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong
| | - George P H Leung
- Department of Pharmacology and Pharmacy, Faculty of Medicine, The University of Hong Kong, Hong Kong.
| | - Yiu Wa Kwan
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong.
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Yang WS, Kim HW, Lee JM, Han NJ, Lee MJ, Park SK. 1,25-Dihydroxyvitamin D3 Causes ADAM10-Dependent Ectodomain Shedding of Tumor Necrosis Factor Receptor 1 in Vascular Smooth Muscle Cells. Mol Pharmacol 2015; 87:533-42. [DOI: 10.1124/mol.114.097147] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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Widaa A, Brennan O, O'Gorman DM, O'Brien FJ. The osteogenic potential of the marine-derived multi-mineral formula aquamin is enhanced by the presence of vitamin D. Phytother Res 2013; 28:678-84. [PMID: 23873476 DOI: 10.1002/ptr.5038] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Revised: 06/23/2013] [Accepted: 06/25/2013] [Indexed: 12/24/2022]
Abstract
Bone degenerative diseases are on the increase globally and are often problematic to treat. This has led to a demand to identify supplements that aid bone growth and formation. Aquamin is a natural multi-mineral food supplement, derived from the red algae Lithothamnion species which contains calcium, magnesium and 72 other trace minerals. It has been previously reported to increase bone formation and mineralisation. This study aimed to investigate the 28 day in vitro osteogenic response of Aquamin supplemented with Vitamin D. The osteogenic potential of MC3T3-E1 osteoblast-like cells was analysed in standard osteogenic medium supplemented with Aquamin +/- Vitamin D3, and the controls consisted of osteogenic medium, +/- Vitamin D3. Proliferation of osteoblasts, metabolic activity and cell viability did not differ between Aquamin and the osteogenic control groups. Alkaline phosphatase (ALP) levels and mineralisation were increased by the supplementation of Aquamin, and the addition of Vitamin D3 increased mineralisation for all groups. The combination of Aquamin and Vitamin D3 yielded a significant increase in ALP and mineralisation over Aquamin alone and the standard osteogenic control +/- Vitamin D3. This study demonstrates that Aquamin aids osteogenesis, and that its osteogenic response can be enhanced by combining Aquamin with Vitamin D3.
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Affiliation(s)
- A Widaa
- Tissue Engineering Research Group (TERG), Dept. of Anatomy, Royal College of Surgeons in Ireland, 123 St. Stephen's Green, Dublin 2, Ireland; Trinity Centre for Bioengineering, Trinity College Dublin, Dublin 2, Ireland; Advanced Materials and Bioengineering Research (AMBER) Centre, RCSI & TCD, Ireland
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