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Guo Y, Li X, Geng C, Song S, Xie X, Wang C. Vitamin D receptor involves in the protection of intestinal epithelial barrier function via up-regulating SLC26A3. J Steroid Biochem Mol Biol 2023; 227:106231. [PMID: 36462760 DOI: 10.1016/j.jsbmb.2022.106231] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Revised: 05/13/2022] [Accepted: 07/15/2022] [Indexed: 12/05/2022]
Abstract
BACKGROUND Vitamin D receptor (VDR) and SLC26A3 (DRA) have been identified as pivotal protective factors in maintaining gut homeostasis in IBD patients. However, the specific mechanism underlying the increased intestinal susceptibility to inflammation induced by the loss of VDR and whether DRA participates in the role of VDR regulating intestinal epithelial barrier function are undefined. AIM The current study is undertaken to elucidate the regulatory effects of VDR on DRA and VDR prevents intestinal epithelial barrier dysfunction via up-regulating the expression of DRA. METHODS WT and VDR-/- mice are used as models for intestinal epithelial response. Paracellular permeability is measured by TEER and FD-4 assays. Immunohistochemistry, immunofluorescence, qPCR and immunoblotting are performed to determine the effects of VDR and DRA on gut epithelial barrier function. RESULTS VDR-/- mice exhibits significant hyperpermeability of intestine with greatly decreased levels of ZO-1 and Claudin1 proteins. DRA is located on the intestinal epithelial apical membrane and is tightly modulated by VDR in vivo and in vitro via activating ERK1/2 MAPK signaling pathway. Notably, the current study for the first time demonstrates that VDR maintains intestinal epithelial barrier integrity via up-regulating DRA expression and the lack of DRA induced by VDR knockdown leads to a more susceptive condition for intestine to DSS-induced colitis. CONCLUSION Our study provides evidence and deep comprehension regarding the role of VDR in modulating DRA expression in gut homeostasis and makes novel contributions to better generally understanding the links between VDR, DRA and intestinal epithelial barrier function.
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Affiliation(s)
- Yaoyu Guo
- Department of Gastroenterology, West China Hospital of Sichuan University, Chengdu, China
| | - Xiao Li
- Department of Gastroenterology, West China Hospital of Sichuan University, Chengdu, China
| | - Chong Geng
- Department of Gastroenterology, West China Hospital of Sichuan University, Chengdu, China
| | - Shuailing Song
- Department of Gastroenterology, West China Hospital of Sichuan University, Chengdu, China
| | - Xiaoxi Xie
- Department of Gastroenterology, West China Hospital of Sichuan University, Chengdu, China
| | - Chunhui Wang
- Department of Gastroenterology, West China Hospital of Sichuan University, Chengdu, China.
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2
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Kumar S, Nanduri R, Bhagyaraj E, Kalra R, Ahuja N, Chacko AP, Tiwari D, Sethi K, Saini A, Chandra V, Jain M, Gupta S, Bhatt D, Gupta P. Vitamin D3-VDR-PTPN6 axis mediated autophagy contributes to the inhibition of macrophage foam cell formation. Autophagy 2020; 17:2273-2289. [DOI: 10.1080/15548627.2020.1822088] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Affiliation(s)
- Sumit Kumar
- Molecular Biology, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Ravikanth Nanduri
- Molecular Biology, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Ella Bhagyaraj
- Molecular Biology, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Rashi Kalra
- Molecular Biology, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Nancy Ahuja
- Molecular Biology, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Anuja P. Chacko
- Molecular Biology, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Drishti Tiwari
- Molecular Biology, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Kanupriya Sethi
- Molecular Biology, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Ankita Saini
- Molecular Biology, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Vemika Chandra
- Molecular Biology, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Monika Jain
- Molecular Biology, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Shalini Gupta
- Molecular Biology, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Deepak Bhatt
- Molecular Biology, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Pawan Gupta
- Molecular Biology, CSIR-Institute of Microbial Technology, Chandigarh, India
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3
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Hossain MS, Rahaman SA, Hatai J, Saha M, Bandyopadhyay S. Switching the recognition ability of a photoswitchable receptor towards phosphorylated anions. Chem Commun (Camb) 2020; 56:4172-4175. [PMID: 32167107 DOI: 10.1039/d0cc00926a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
An azobenzene based photoswitchable macrocyclic receptor displays different binding affinities in its E and Z forms towards various phosphorylated coenzymes under physiological conditions with remarkable selectivity for ATP in the E-form and selectivity towards GTP in the photoisomerized Z-form. Linear discriminant analysis clearly separated the analytes using the E-form. An application of this method enabled monitoring the progress of enzymatic phosphorylation using a tyrosine kinase enzyme.
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Affiliation(s)
- Munshi Sahid Hossain
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, Nadia, West Bengal 741246, India.
| | - Sk Atiur Rahaman
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, Nadia, West Bengal 741246, India.
| | - Joydev Hatai
- Institute of Organic Chemistry, University of Duisburg-Essen, Universitatsstraße 745141, Essen, Germany.
| | - Monochura Saha
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, Nadia, West Bengal 741246, India.
| | - Subhajit Bandyopadhyay
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, Nadia, West Bengal 741246, India.
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4
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Stephan L, Bouchentouf M, Mills P, Lafreniere JF, Tremblay JP. 1,25-Dihydroxyvitamin D3 Increases the Transplantation Success of Human Muscle Precursor Cells in SCID Mice. Cell Transplant 2017; 16:391-402. [PMID: 17658129 DOI: 10.3727/000000007783464876] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Human muscle precursor cell (hMPC) transplantation is a potential therapy for severe muscle trauma or myopathies. Some previous studies demonstrated that 1,25-dihydroxyvitamin-D3 (1,25-D3) acted directly on myoblasts, regulating their proliferation and fusion. 1,25-D3 is also involved in apoptosis modulation of other cell types and may thus contribute to protect the transplanted hMPCs. We have therefore investigated whether 1,25-D3 could improve the hMPC graft success. The 1,25-D3 effects on hMPC proliferation, fusion, and survival were initially monitored in vitro. hMPCs were also grafted in the tibialis anterior of SCID mice treated or not with 1,25-D3 to determine its in vivo effect. Graft success, proliferation, and viability of transplanted hMPCs were evaluated. 1,25-D3 enhanced proliferation and fusion of hMPCs in vitro and in vivo. However, 1,25-D3 did not protect hMPCs from various proapoptotic factors (in vitro) or during the early posttransplantation period. 1,25-D3 enhanced hMPC graft success because the number of muscle fibers expressing human dystrophin was significantly increased in the TA sections of 1,25-D3-treated mice (166.75 ± 20.64) compared to the control mice (97.5 ± 16.58). This result could be partly attributed to the improvement of the proliferation and differentiation of hMPCs in the presence of 1,25-D3. Thus, 1,25-D3 administration could improve the clinical potential of hMPC transplantation currently developed for muscle trauma or myopathies.
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Affiliation(s)
- Lionel Stephan
- Unité de Génétique Humaine, Centre de Recherche du CHUL, Université Laval, Québec, Canada
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5
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Kim YJ, Tamadon A, Park HT, Kim H, Ku SY. The role of sex steroid hormones in the pathophysiology and treatment of sarcopenia. Osteoporos Sarcopenia 2016; 2:140-155. [PMID: 30775480 PMCID: PMC6372754 DOI: 10.1016/j.afos.2016.06.002] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 06/09/2016] [Accepted: 06/17/2016] [Indexed: 12/18/2022] Open
Abstract
Sex steroids influence the maintenance and growth of muscles. Decline in androgens, estrogens and progesterone by aging leads to the loss of muscular function and mass, sarcopenia. These steroid hormones can interact with different signaling pathways through their receptors. To date, sex steroid hormone receptors and their exact roles are not completely defined in skeletal and smooth muscles. Although numerous studies focused on the effects of sex steroid hormones on different types of cells, still many unexplained molecular mechanisms in both skeletal and smooth muscle cells remain to be investigated. In this paper, many different molecular mechanisms that are activated or inhibited by sex steroids and those that influence the growth, proliferation, and differentiation of skeletal and smooth muscle cells are reviewed. Also, the similarities of cellular and molecular pathways of androgens, estrogens and progesterone in both skeletal and smooth muscle cells are highlighted. The reviewed signaling pathways and participating molecules can be targeted in the future development of novel therapeutics.
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Affiliation(s)
- Yong Jin Kim
- Department of Obstetrics and Gynecology, Korea University Guro Hospital, South Korea
| | - Amin Tamadon
- Department of Obstetrics and Gynecology, College of Medicine, Seoul National University, Seoul, South Korea
| | - Hyun Tae Park
- Department of Obstetrics and Gynecology, Korea University Anam Hospital, Korea University College of Medicine, South Korea
| | - Hoon Kim
- Department of Obstetrics and Gynecology, College of Medicine, Seoul National University, Seoul, South Korea
| | - Seung-Yup Ku
- Department of Obstetrics and Gynecology, College of Medicine, Seoul National University, Seoul, South Korea
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Civelek GM, Pekyavas NO, Cetin N, Cosar SN, Karatas M. Association of vitamin D deficiency with muscle strength and quality of life in postmenopausal women. Climacteric 2014; 17:472-7. [DOI: 10.3109/13697137.2014.898265] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Barker T, Schneider ED, Dixon BM, Henriksen VT, Weaver LK. Supplemental vitamin D enhances the recovery in peak isometric force shortly after intense exercise. Nutr Metab (Lond) 2013; 10:69. [PMID: 24313936 PMCID: PMC4029611 DOI: 10.1186/1743-7075-10-69] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Accepted: 12/02/2013] [Indexed: 11/18/2022] Open
Abstract
Background Serum 25-hydroxyvitamin D (25(OH)D) concentrations associate with skeletal muscle weakness (i.e., deficit in skeletal muscle strength) after muscular injury or damage. Although supplemental vitamin D increases serum 25(OH)D concentrations, it is unknown if supplemental vitamin D enhances strength recovery after a damaging event. Methods Reportedly healthy and modestly active (30 minute of continuous physical activity at least 3 time/week) adult males were randomly assigned to a placebo (n = 13, age, 31(5) y; BMI, 26.9(4.2) kg/m2; serum 25(OH)D, 31.0(8.2) ng/mL) or vitamin D (cholecalciferol, 4000 IU; n = 15; age, 30(6) y; BMI, 27.6(6.0) kg/m2; serum 25(OH)D, 30.5(9.4) ng/mL) supplement. Supplements were taken daily for 35-d. After 28-d of supplementation, one randomly selected leg performed an exercise protocol (10 sets of 10 repetitive eccentric-concentric jumps on a custom horizontal plyo-press at 75% of body mass with a 20 second rest between sets) intended to induce muscle damage. During the exercise protocol, subjects were allowed to perform presses if they were unable to complete two successive jumps. Circulating chemistries (25(OH)D and alanine (ALT) and aspartate (AST) aminotransferases), single-leg peak isometric force, and muscle soreness were measured before supplementation. Circulating chemistries, single-leg peak isometric force, and muscle soreness were also measured before (immediately) and after (immediately, 1-h [blood draw only], 24-h, 48-h, 72-h, and 168-h) the damaging event. Results Supplemental vitamin D increased serum 25(OH)D concentrations (P < 0.05; ≈70%) and enhanced the recovery in peak isometric force after the damaging event (P < 0.05; ≈8% at 24-h). Supplemental vitamin D attenuated (P < 0.05) the immediate and delayed (48-h, 72-h, or 168-h) increase in circulating biomarkers representative of muscle damage (ALT or AST) without ameliorating muscle soreness (P > 0.05). Conclusions We conclude that supplemental vitamin D may serve as an attractive complementary approach to enhance the recovery of skeletal muscle strength following intense exercise in reportedly active adults with a sufficient vitamin D status prior to supplementation.
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Affiliation(s)
- Tyler Barker
- The Orthopedic Specialty Hospital, 5848 S, Fashion Blvd,, Murray, UT 84107, USA.
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8
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Plasma membrane Pdia3 and VDR interact to elicit rapid responses to 1α,25(OH)2D3. Cell Signal 2013; 25:2362-73. [DOI: 10.1016/j.cellsig.2013.07.020] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2013] [Accepted: 07/19/2013] [Indexed: 12/29/2022]
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Barker T, Henriksen VT, Martins TB, Hill HR, Kjeldsberg CR, Schneider ED, Dixon BM, Weaver LK. Higher serum 25-hydroxyvitamin D concentrations associate with a faster recovery of skeletal muscle strength after muscular injury. Nutrients 2013; 5:1253-75. [PMID: 23595134 PMCID: PMC3705346 DOI: 10.3390/nu5041253] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Revised: 03/18/2013] [Accepted: 03/29/2013] [Indexed: 12/16/2022] Open
Abstract
The primary purpose of this study was to identify if serum 25-hydroxyvitamin D (25(OH)D) concentrations predict muscular weakness after intense exercise. We hypothesized that pre-exercise serum 25(OH)D concentrations inversely predict exercise-induced muscular weakness. Fourteen recreationally active adults participated in this study. Each subject had one leg randomly assigned as a control. The other leg performed an intense exercise protocol. Single-leg peak isometric force and blood 25(OH)D, aspartate and alanine aminotransferases, albumin, interferon (IFN)-γ, and interleukin-4 were measured prior to and following intense exercise. Following exercise, serum 25(OH)D concentrations increased (p < 0.05) immediately, but within minutes, subsequently decreased (p < 0.05). Circulating albumin increases predicted (p < 0.005) serum 25(OH)D increases, while IFN-γ increases predicted (p < 0.001) serum 25(OH)D decreases. Muscular weakness persisted within the exercise leg (p < 0.05) and compared to the control leg (p < 0.05) after the exercise protocol. Serum 25(OH)D concentrations inversely predicted (p < 0.05) muscular weakness (i.e., control leg vs. exercise leg peak isometric force) immediately and days (i.e., 48-h and 72-h) after exercise, suggesting the attenuation of exercise-induced muscular weakness with increasing serum 25(OH)D prior to exercise. Based on these data, we conclude that pre-exercise serum 25(OH)D concentrations could influence the recovery of skeletal muscle strength after an acute bout of intense exercise.
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Affiliation(s)
- Tyler Barker
- The Orthopedic Specialty Hospital, Murray, UT 84107, USA; E-Mail:
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +1-801-314-4951; Fax: +1-801-314-4862
| | | | - Thomas B. Martins
- ARUP Laboratories, Institute for Clinical and Experimental Pathology, Salt Lake City, UT 84108, USA; E-Mails: (T.B.M.); (H.R.H.); (C.R.K.)
| | - Harry R. Hill
- ARUP Laboratories, Institute for Clinical and Experimental Pathology, Salt Lake City, UT 84108, USA; E-Mails: (T.B.M.); (H.R.H.); (C.R.K.)
- Department of Pathology, Pediatrics and Medicine, University of Utah, Salt Lake City, UT 84132, USA
| | - Carl R. Kjeldsberg
- ARUP Laboratories, Institute for Clinical and Experimental Pathology, Salt Lake City, UT 84108, USA; E-Mails: (T.B.M.); (H.R.H.); (C.R.K.)
- Department of Pathology, Pediatrics and Medicine, University of Utah, Salt Lake City, UT 84132, USA
| | - Erik D. Schneider
- USANA Health Sciences, Inc., Salt Lake City, UT 84120, USA; E-Mails: (E.D.S.); (B.M.D.)
| | - Brian M. Dixon
- USANA Health Sciences, Inc., Salt Lake City, UT 84120, USA; E-Mails: (E.D.S.); (B.M.D.)
| | - Lindell K. Weaver
- Hyperbaric Medicine, Intermountain Medical Center, Murray, UT 84107, USA; E-Mail:
- LDS Hospital, Salt Lake City, UT 84143, USA
- School of Medicine, University of Utah, Salt Lake City, UT 84132, USA
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10
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Vitamin d status and spine surgery outcomes. ISRN ORTHOPEDICS 2013; 2013:471695. [PMID: 24959360 PMCID: PMC4045309 DOI: 10.1155/2013/471695] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Accepted: 03/19/2013] [Indexed: 12/14/2022]
Abstract
There is a high prevalence of hypovitaminosis D in patients with back pain regardless of whether or not they require surgical intervention. Furthermore, the risk of hypovitaminosis D is not limited to individuals with traditional clinical risk factors. Vitamin D plays an essential role in bone formation, maintenance, and remodeling, as well as muscle function. Published data indicate that hypovitaminosis D could adversely affect bone formation and muscle function in multiple ways. The literature contains numerous reports of myopathy and/or musculoskeletal pain associated with hypovitaminosis D. In terms of spinal fusion outcomes, a patient may have a significant decrease in pain and the presence of de novo bone on an X-ray, yet their functional ability may remain severely limited. Hypovitaminosis D may be a contributing factor to the persistent postoperative pain experienced by these patients. Indeed, hypovitaminosis D is not asymptomatic, and symptoms can manifest themselves independent of the musculoskeletal pathological changes associated with conditions like osteomalacia. It appears that vitamin D status is routinely overlooked, and there is a need to raise awareness about its importance among all healthcare practitioners who treat spine patients.
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Boland RL. VDR activation of intracellular signaling pathways in skeletal muscle. Mol Cell Endocrinol 2011; 347:11-6. [PMID: 21664245 DOI: 10.1016/j.mce.2011.05.021] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Revised: 05/08/2011] [Accepted: 05/08/2011] [Indexed: 12/14/2022]
Abstract
The purpose of this article is to review the activation of signal transduction pathways in skeletal muscle cells by the hormone 1α,25(OH)(2)-vitamin D(3) [1α,25(OH)(2)D(3)], focusing on the role of the vitamin D receptor (VDR). The hormone induces fast, non transcriptional responses, involving stimulation of the transmembrane second messenger systems adenylyl cyclase/cAMP/PKA, PLC/DAG+IP(3)/PKC, Ca(2+) messenger system and MAPK cascades. Short treatment with 1α,25(OH)(2)D(3) induces reverse translocation of the VDR from the nucleus to plasma membranes. Accordingly, a complex is formed in the caveolae between the VDR and TRCP3, integral protein of capacitative Ca(2+) entry (CCE), suggesting an association between both proteins and a functional role of the VDR in 1α,25(OH)(2)D(3) activation of CCE. Stimulation of tyrosine phosphorylation cascades by 1α,25(OH)(2)D(3) have demonstrated the formation of complexes between Src and the VDR. Through these mechanisms, 1α,25(OH)(2)D(3) plays an important function in contractility and myogenesis.
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Affiliation(s)
- Ricardo L Boland
- Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, San Juan 670, 8000 Bahia Blanca, Argentina.
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Testerink J, Jaspers RT, Rittweger J, de Haan A, Degens H. Effects of alfacalcidol on circulating cytokines and growth factors in rat skeletal muscle. J Physiol Sci 2011; 61:525-35. [PMID: 21909988 PMCID: PMC10717088 DOI: 10.1007/s12576-011-0174-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2011] [Accepted: 08/18/2011] [Indexed: 12/12/2022]
Abstract
Supra-physiological levels of vitamin D induce skeletal muscle atrophy, which may be particularly detrimental in already sarcopaenic elderly. Neither the cause nor whether the atrophy is fibre type specific are known. To obtain supraphysiological levels of circulating vitamin D (1,25(OH)(2)D(3)) 27.5-month-old female Fischer(344) × Brown Norway F1 rats were orally treated for 6 weeks with vehicle or the vitamin D analogue alfacalcidol. Alfacalcidol treatment induced a 22% decrease in body mass and 17% muscle atrophy. Fibre atrophy was restricted to type IIb fibres in the low-oxidative part of the gastrocnemius medialis only (-22%; P < 0.05). There was a concomitant 1.6-fold increase in mRNA expression of the ubiquitin ligase MuRF-1 (P < 0.001), whereas those of insulin-like growth factor 1 and myostatin were not affected. Circulating IL-6 was unaltered, but leptin and adiponectin were decreased (-39%) and increased (64%), respectively. The treated rats also exhibited a reduced food intake. In conclusion, supraphysiological levels of circulating 1,25(OH)(2)D(3) cause preferential atrophy of type IIb fibres, which is associated with an increased expression of MuRF-1 without evidence of systemic inflammation. The atrophy and loss of body mass in the presence of supra-physiological levels of vitamin D are primarily due to a reduced food intake.
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Affiliation(s)
- Janwillem Testerink
- Institute for Biomedical Research into Human Movement and Health, Manchester Metropolitan University, John Dalton Building, Oxford Road, Manchester, M5 1GD UK
- Research Institute MOVE, Faculty of Human Movement Sciences, VU University Amsterdam, 1081 BT Amsterdam, The Netherlands
| | - Richard T. Jaspers
- Research Institute MOVE, Faculty of Human Movement Sciences, VU University Amsterdam, 1081 BT Amsterdam, The Netherlands
| | - Jörn Rittweger
- Institute for Biomedical Research into Human Movement and Health, Manchester Metropolitan University, John Dalton Building, Oxford Road, Manchester, M5 1GD UK
- Institute of Aerospace Medicine, German Aerospace Center, Cologne, Germany
| | - Arnold de Haan
- Institute for Biomedical Research into Human Movement and Health, Manchester Metropolitan University, John Dalton Building, Oxford Road, Manchester, M5 1GD UK
- Research Institute MOVE, Faculty of Human Movement Sciences, VU University Amsterdam, 1081 BT Amsterdam, The Netherlands
| | - Hans Degens
- Institute for Biomedical Research into Human Movement and Health, Manchester Metropolitan University, John Dalton Building, Oxford Road, Manchester, M5 1GD UK
- Institute of Aerospace Medicine, German Aerospace Center, Cologne, Germany
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13
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Puthucheary Z, Skipworth JR, Rawal J, Loosemore M, Van Someren K, Montgomery HE. Genetic Influences in Sport and Physical Performance. Sports Med 2011; 41:845-59. [DOI: 10.2165/11593200-000000000-00000] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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14
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Barker T, Martins TB, Hill HR, Kjeldsberg CR, Trawick RH, Weaver LK, Traber MG. Low Vitamin D Impairs Strength Recovery After Anterior Cruciate Ligament Surgery. J Evid Based Complementary Altern Med 2011. [DOI: 10.1177/2156587211413768] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The purpose of this study was to identify strength gains after an anterior cruciate ligament injury and surgery and during inflammatory challenge in participants with disparate vitamin D levels. Plasma samples were obtained from those who had not previously experienced an anterior cruciate ligament injury and from injured patients 2 weeks before and 3 months after anterior cruciate ligament surgery. Plasma 25-hydroxyvitamin D and cytokine concentrations were measured in each blood sample. Single-leg peak isometric forces were measured 2 weeks presurgery and 3 months postsurgery. Compared with noninjured participants, inflammatory cytokines were elevated prior to and following anterior cruciate ligament reconstruction. During this inflammatory challenge, the peak isometric force increases after surgery were significantly lower in those with plasma 25-hydroxyvitamin D concentrations <30 ng/mL compared with those with concentrations ≥30 ng/mL. The authors conclude that low vitamin D appears to hinder strength recovery after anterior cruciate ligament surgery and during inflammatory insult.
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Affiliation(s)
- Tyler Barker
- The Orthopedic Specialty Hospital, Murray, UT, USA
| | - Thomas B. Martins
- ARUP Laboratories, Institute for Clinical and Experimental Pathology, Salt Lake City, UT, USA
| | - Harry R. Hill
- ARUP Laboratories, Institute for Clinical and Experimental Pathology, Salt Lake City, UT, USA
- Department of Pathology, University of Utah, Salt Lake City, UT, USA
| | - Carl R. Kjeldsberg
- ARUP Laboratories, Institute for Clinical and Experimental Pathology, Salt Lake City, UT, USA
- Department of Pathology, University of Utah, Salt Lake City, UT, USA
| | - Roy H. Trawick
- The Orthopedic Specialty Hospital and Clinic, Murray, UT, USA
| | - Lindell K. Weaver
- Hyperbaric Medicine, Intermountain Medical Center, Murray, UT, USA and LDS Hospital, Salt Lake City, UT, USA
- University of Utah, School of Medicine, Salt Lake City, UT, USA
| | - Maret G. Traber
- Linus Pauling Institute and Department of Nutrition and Exercise Sciences, Oregon State University, Corvallis, OR, USA
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15
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Buitrago C, Costabel M, Boland R. PKC and PTPα participate in Src activation by 1α,25OH2 vitamin D3 in C2C12 skeletal muscle cells. Mol Cell Endocrinol 2011; 339:81-9. [PMID: 21459125 DOI: 10.1016/j.mce.2011.03.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2010] [Revised: 02/22/2011] [Accepted: 03/25/2011] [Indexed: 01/15/2023]
Abstract
We previously demonstrated that 1α,25(OH)(2)-vitamin D(3) [1α,25(OH)(2)D(3)] induces Src activation, which mediates the hormone-dependent ERK1/2 and p38 MAPK phosphorylation in skeletal muscle cells. In the present study, we have investigated upstream steps whereby 1α,25(OH)(2)D(3) may act to transmit its signal to Src. Preincubation with the PKC inhibitor Ro318220 demonstrated the participation of PKC in 1α,25(OH)(2)D(3)-dependent Src activation. Of interest, the hormone promoted the activation of δ the isoform of PKC. We also explored the role of PTPα in PKC-mediated Src stimulation. Silencing of PTPα with a specific siRNA suppressed Src activation induced by 1α,25(OH)(2)D(3). Hormone treatment increased PTPα (Tyr789) phosphorylation and PKC-dependent phosphatase activity. Accordingly, 1α,25(OH)(2)D(3) promoted serine phosphorylation of PTPα in a PKC-dependent manner. Confocal immunocytochemistry and co-immunoprecipitation assays revealed that the hormone induces the co-localization of Src and PTPα with PKC participation. Computational analysis revealed that the electrostatic interaction between Src and PTPα is favored when PTPα is phosphorylated in Tyr789. These data suggest that 1α,25(OH)(2)D(3) acts in skeletal muscle upstream on MAPK cascades sequentially activating PKC, PTPα and Src.
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Affiliation(s)
- Claudia Buitrago
- Departamento de Biología, Bioquímica & Farmacia, Universidad Nacional del Sur., San Juan 670, Bahía Blanca 8000, Argentina.
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Lajdova I, Chorvat D, Chorvatova A. Rapid effects of 1alpha,25(OH)2D3 in resting human peripheral blood mononuclear cells. Eur J Pharmacol 2008; 586:14-23. [PMID: 18353308 DOI: 10.1016/j.ejphar.2008.02.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2007] [Revised: 01/25/2008] [Accepted: 02/06/2008] [Indexed: 11/18/2022]
Abstract
The steroid hormone 1alpha,25(OH)2D3 produces biological responses via both genomic and nongenomic mechanisms. Stimulation of rapid, nongenomic responses by 1alpha,25(OH)2D3 has been postulated to result from interaction of the ligand with cell membrane 1alpha,25(OH)2D3 receptors and to involve membrane receptors. We examined the rapid effects of 1alpha,25(OH)2D3 on calcium mobilization and calcium entry into resting human peripheral blood mononuclear cells isolated from healthy volunteers. We also investigated the possible involvement of purinergic receptors in this action. 1alpha,25(OH)2D3 induced a time-dependent increase in intracellular calcium concentration ([Ca2+]i). The initial 1alpha,25(OH)2D3-stimulated calcium increment was sensitive to thapsigargin (Tg), indicating its origins in calcium release from intracellular stores. 2-Aminoethyldiphenyl borate (2APB), an inhibitor of capacitative calcium entry, caused a significant [Ca2+]i decrease in human cells treated with 1alpha,25(OH)2D3. Furthermore, in contrast to observations in osteoblasts and skeletal muscle cells, nifedipine had no effect on 1alpha,25(OH)2D3-induced calcium entry, suggesting that L-type calcium channels were not implicated in this action. Besides, 1alpha,25(OH)(2)D3 prevented the calcium entry induced by 3'-O-(4-benzoyl)benzoyl-adenosine 5'-triphosphate (BzATP), a specific agonist of purinergic P2X7 receptors. This finding was further confirmed by 1alpha,25(OH)2D3-induced reduction of BzATP- and 4-aminopyridine (4AP)-stimulated ethidium bromide fluorescence. The presented results demonstrate, for the first time in healthy, resting human peripheral blood mononuclear cells that 1alpha,25(OH)2D3 is capable of exerting a rapid, nongenomic effect on [Ca2+]i, while inhibiting of the P2X7 channel permeability.
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Hopkinson NS, Li KW, Kehoe A, Humphries SE, Roughton M, Moxham J, Montgomery H, Polkey MI. Vitamin D receptor genotypes influence quadriceps strength in chronic obstructive pulmonary disease. Am J Clin Nutr 2008; 87:385-90. [PMID: 18258629 DOI: 10.1093/ajcn/87.2.385] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Quadriceps weakness is an important complication of chronic obstructive pulmonary disease (COPD) and is associated with impaired exercise capacity and greater mortality. Its etiology is multifactorial, and evidence is growing that it is partly determined by genetic susceptibility. OBJECTIVE Using an established cohort, we tested whether quadriceps weakness in patients with COPD is influenced by common variations in the gene for the vitamin D receptor. DESIGN Vitamin D receptor FokI and BsmI genotypes and the (I/D) angiotensin-converting enzyme (ACE) and bradykinin receptor (+9/-9) genotypes were identified in 107 patients with stable COPD [x +/- SD forced expiratory volume in 1 s (FEV(1)): 34.5 +/- 16.5] and 104 healthy, age-matched control subjects. Quadriceps maximum voluntary contraction force and fat-free mass assessed by bioelectrical impedance analysis were measured. RESULTS After adjustment for covariables, both patients and control subjects who were homozygous for the C allele of the FokI polymorphism had less quadriceps strength than did those with > or =1 T allele [41.0 +/- 11.8 compared with 46.0 +/- 13.2 kg (P = 0.01) and 32.5 +/- 11.2 compared with 36.2 +/- 13.1 kg (P = 0.005), respectively]. The b allele of the BsmI polymorphism was associated with greater quadriceps strength in patients-37.0 +/- 13.3, 33.8 +/- 11.6, and 33.8 +/- 11.6 kg for bb, bB, and BB, respectively (P = 0.0005)-but had no effect in healthy control subjects. The effect of BsmI on quadriceps strength was least apparent in patients with the ACE II genotype (P = 0.003). CONCLUSIONS The FokI common variants in the VDR gene are associated with skeletal muscle strength in both patients and control subjects, whereas the BsmI polymorphism is associated with strength only in patients.
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Buitrago CG, Ronda AC, de Boland AR, Boland R. MAP kinases p38 and JNK are activated by the steroid hormone 1alpha,25(OH)2-vitamin D3 in the C2C12 muscle cell line. J Cell Biochem 2006; 97:698-708. [PMID: 16215981 DOI: 10.1002/jcb.20639] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
In chick skeletal muscle cell primary cultures, we previously demonstrated that 1alpha,25(OH)2-vitamin D3 [1alpha,25(OH)2D3], the hormonally active form of vitamin D, increases the phosphorylation and activity of the extracellular signal-regulated mitogen-activated protein (MAP) kinase isoforms ERK1 and ERK2, their subsequent translocation to the nucleus and involvement in DNA synthesis stimulation. In this study, we show that other members of the MAP kinase superfamily are also activated by the hormone. Using the muscle cell line C2C12 we found that 1alpha,25(OH)2D3 within 1 min phosphorylates and increases the activity of p38 MAPK. The immediately upstream mitogen-activated protein kinase kinases 3/6 (MKK3/MKK6) were also phosphorylated by the hormone suggesting their participation in p38 activation. 1Alpha,25(OH)2D3 was able to dephosphorylate/activate the ubiquitous cytosolic tyrosine kinase c-Src in C2C12 cells and studies with specific inhibitors imply that Src participates in hormone induced-p38 activation. Of relevance, 1alpha,25(OH)2D3 induced in the C2C12 line the stimulation of mitogen-activated protein kinase activating protein kinase 2 (MAPKAP-kinase 2) and subsequent phosphorylation of heat shock protein 27 (HSP27) in a p38 kinase activation-dependent manner. Treatment with the p38 inhibitor, SB203580, blocked p38 phosphorylation caused by the hormone and inhibited the phosphorylation of its downstrean substrates. 1Alpha,25(OH)2D3 also promotes the phosphorylation of c-jun N-terminal protein kinases (JNK 1/2), the response is fast (0.5-1 min) and maximal phosphorylation of the enzyme is observed at physiological doses of 1alpha,25(OH)2D3 (1 nM). The relative contribution of ERK-1/2, p38, and JNK-1/2 and their interrelationships in hormonal regulation of muscle cell proliferation and differentiation remain to be established.
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Affiliation(s)
- Claudia G Buitrago
- Departamento de Biología, Bioquímica & Farmacia, Universidad Nacional del Sur, San Juan 670, 8000 Bahía Blanca, Argentina
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19
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Abstract
A constant extracellular Ca2+ concentration is required for numerous physiological functions at tissue and cellular levels. This suggests that minor changes in Ca2+ will be corrected by appropriate homeostatic systems. The system regulating Ca2+ homeostasis involves several organs and hormones. The former are mainly the kidneys, skeleton, intestine and the parathyroid glands. The latter comprise, amongst others, the parathyroid hormone, vitamin D and calcitonin. Progress has recently been made in the identification and characterisation of Ca2+ transport proteins CaT1 and ECaC and this has provided new insights into the molecular mechanisms of Ca2+ transport in cells. The G-protein coupled calcium-sensing receptor, responsible for the exquisite ability of the parathyroid gland to respond to small changes in serum Ca2+ concentration was discovered about a decade ago. Research has focussed on the molecular mechanisms determining the serum levels of 1,25(OH)2D3, and on the transcriptional activity of the vitamin D receptor. The aim of recent work has been to elucidate the mechanisms and the intracellular signalling pathways by which parathyroid hormone, vitamin D and calcitonin affect Ca2+ homeostasis. This article summarises recent advances in the understanding and the molecular basis of physiological Ca2+ homeostasis.
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Affiliation(s)
- Indra Ramasamy
- Department of Chemical Pathology, Newham University Hospital, London, UK.
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Pardo VG, Boland R, de Boland AR. 1α,25(OH)2-Vitamin D3 stimulates intestinal cell p38 MAPK activity and increases c-Fos expression. Int J Biochem Cell Biol 2006; 38:1181-90. [PMID: 16483831 DOI: 10.1016/j.biocel.2005.12.018] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2005] [Revised: 11/14/2005] [Accepted: 12/21/2005] [Indexed: 11/20/2022]
Abstract
In intestinal cells, as in other target cells, the steroid hormone 1alpha,25(OH)(2)-Vitamin D(3) (1alpha,25(OH)(2)D(3)) regulates gene expression via the specific intracellular Vitamin D receptor and induces fast non-transcriptional responses involving stimulation of transmembrane signal transduction pathways. We have previously shown that the hormone activates the extracellular signal-regulated mitogen-activated protein (MAP) kinase isoforms ERK1 and ERK2 in rat intestinal cells. In the present study, we have demonstrated that 1alpha,25(OH)(2)D(3) also induces the phosphorylation and activation of p38 MAPK in these cells. The hormone effects were time and dose-dependent, with maximal stimulation at 2min (+3-fold) and 1nM. 1alpha,25(OH)(2)D(3)-dependent p38 phosphorylation was suppressed by SB 203580, a selective inhibitor of p38 MAPK. Ca(2+) chelation with EGTA, inhibition of the c-Src-tyrosine kinase family with PP1 or protein kinase A (PKA) with Rp-cAMP, attenuated hormone activation of p38 MAPK. The physiological significance of 1alpha,25(OH)(2)D(3)-dependent activation of ERK1/2 and p38 MAP kinases was addressed by monitoring c-Fos expression. Incubation of intestinal cells with the hormone was followed by a rapid induction of c-Fos expression which was blocked by SB 203580 and partially suppressed by the ERK1/2 inhibitor PD 98059. Our results suggest that 1alpha,25(OH)(2)D(3) activates p38 MAPK, involving Ca(2+), c-Src and PKA as upstream regulators, and that p38 MAPK has a central role in hormone-induction of the oncoprotein c-Fos in rat intestinal cells.
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Affiliation(s)
- Verónica González Pardo
- Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, 8000 Bahía Blanca, Argentina
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Boland R, Buitrago C, De Boland AR. Modulation of tyrosine phosphorylation signalling pathways by 1alpha,25(OH)2-vitamin D3. Trends Endocrinol Metab 2005; 16:280-7. [PMID: 16002300 DOI: 10.1016/j.tem.2005.06.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2005] [Revised: 04/11/2005] [Accepted: 06/23/2005] [Indexed: 12/15/2022]
Abstract
Hormonally active vitamin D(3), 1alpha,25(OH)(2)D(3), interacts with the classic vitamin D nuclear receptor that regulates gene transcription and with a putative cell membrane receptor that mediates rapid biological responses. 1alpha,25(OH)(2)D(3) actions on target tissues regulate: mineral metabolism and intracellular Ca(2+); protein kinase cascades leading to cell proliferation, differentiation and apoptosis; muscle growth and contractility; and the immune system. There is evidence for underlying 1alpha,25(OH)(2)D(3)-mediated protein tyrosine phosphorylation signalling in bone, intestine, muscle, epidermal and cancer cells. Extracellular-signal-regulated kinases-1/2, p38 and/or c-jun N-terminal kinase pathways play important roles in mediating 1alpha,25(OH)(2)D(3) actions. Studies to elucidate key regulatory metabolic steps and crosstalk sites in these pathways would enhance our understanding of the significance of tyrosine phosphorylation cascades in normal 1alpha,25(OH)(2)D(3) physiology, pathophysiology and pharmacology.
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Affiliation(s)
- Ricardo Boland
- Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, (8000) Bahía Blanca, Argentina.
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22
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Pardo VG, de Boland AR. Tyrosine phosphorylation signalling dependent on 1α,25(OH)2-vitamin D3 in rat intestinal cells: effect of ageing. Int J Biochem Cell Biol 2004; 36:489-504. [PMID: 14687927 DOI: 10.1016/j.biocel.2003.08.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In intestinal cells, as in other target cells, 1alpha,25(OH)(2)D(3) elicits long-term and short-term responses which involve genomic and non-genomic mode of actions, respectively. There is evidence indicating that activation of tyrosine phosphorylation pathways may participate in the responses induced by 1alpha,25(OH)(2)D(3) through its non-genomic mechanism. In this study we have evaluated the involvement of 1alpha,25(OH)(2)D(3) in the tyrosine phosphorylation of PLCgamma and MAPK (ERK1/2) in enterocytes from young (3 months) and aged (24 months) rats. Immunochemical analysis revealed that the hormone stimulates PLCgamma tyrosine phosphorylation in young rat enterocytes. Hormone effect on PLCgamma is rapid, peaking at 2 min (+100%), is dose-dependent (10(-10) to 10(-8)M) and decreases with ageing. 1alpha,25(OH)(2)D(3) also induces the phosphorylation and activation of the mitogen-activated-protein kinases ERK1 and ERK2, effect which was evident at 1 min (three-fold) and reached a maximum at 2 min (six-fold). Hormone-dependent ERK1 and ERK2 phosphorylation and activity is greatly reduced in enterocytes from old rats. In both, young and aged animals, 1alpha,25(OH)(2)D(3)-induced PLCgamma and ERK1/2 phosphorylation was effectively suppressed by the tyrosine kinase inhibitor genistein (100 uM) and suppressed to a great extent by PP1, an inhibitor of c-Src kinases. LY294002, a specific inhibitor of PI3 kinase (PI3K), enzyme with an important role in mitogenesis, did not affect hormone-dependent ERK1/2 phosphorylation, indicating that PI3K is not involved in 1alpha,25(OH)(2)D(3)-induced MAPK activation. In agreement with this data, enzyme activity assays and tyrosine phosphorylation of the regulatory subunit (p85) of PI3K showed that the hormone has no effect on the enzyme activity in rat enterocytes. Taken together, the present study suggest that in intestinal cells, tyrosine phosphorylation is an important mechanism of 1alpha,25(OH)(2)D(3) involved in PLCgamma and MAPK regulation and that this mechanism is impair with ageing.
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Affiliation(s)
- Verónica González Pardo
- Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur., 8000 Bahía Blanca, Argentina
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23
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Smythe GM, Eby JC, Disatnik MH, Rando TA. A caveolin-3 mutant that causes limb girdle muscular dystrophy type 1C disrupts Src localization and activity and induces apoptosis in skeletal myotubes. J Cell Sci 2003; 116:4739-49. [PMID: 14600260 DOI: 10.1242/jcs.00806] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Caveolins are membrane proteins that are the major coat proteins of caveolae, specialized lipid rafts in the plasma membrane that serve as scaffolding sites for many signaling complexes. Among the many signaling molecules associated with caveolins are the Src tyrosine kinases, whose activation regulates numerous cellular functions including the balance between cell survival and cell death. Several mutations in the muscle-specific caveolin, caveolin-3, lead to a form of autosomal dominant muscular dystrophy referred to as limb girdle muscular dystrophy type 1C (LGMD-1C). One of these mutations (here termed the `TFT mutation') results in a deletion of a tripeptide (ΔTFT(63-65)) that affects the scaffolding and oligomerization domains of caveolin-3. This mutation causes a 90-95% loss of caveolin-3 protein levels and reduced formation of caveolae in skeletal muscle fibers. However, the effects of this mutation on the specific biochemical processes and cellular functions associated with caveolae have not been elucidated. We demonstrate that the TFT caveolin-3 mutation in post-mitotic skeletal myotubes causes severely reduced localization of caveolin-3 to the plasma membrane and to lipid rafts, and significantly inhibits caveolar function. The TFT mutation reduced the binding of Src to caveolin-3, diminished targeting of Src to lipid rafts, and caused abnormal perinuclear accumulation of Src. Along with these alterations of Src localization and targeting, there was elevated Src activation in myotubes expressing the TFT mutation and an increased incidence of apoptosis in those cells compared with control myotubes. The results of this study demonstrate that caveolin-3 mutations associated with LGMD-1C disrupt normal cellular signal transduction pathways associated with caveolae and cause apoptosis in muscle cells, all of which may reflect pathogenetic pathways that lead to muscle degeneration in these disorders.
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Affiliation(s)
- Gayle M Smythe
- Department of Neurology and Neurological Science, Stanford University School of Medicine, Stanford, California 94305-5235, USA
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Schwartz Z, Shaked D, Hardin RR, Gruwell S, Dean DD, Sylvia VL, Boyan BD. 1alpha,25(OH)2D3 causes a rapid increase in phosphatidylinositol-specific PLC-beta activity via phospholipase A2-dependent production of lysophospholipid. Steroids 2003; 68:423-37. [PMID: 12798493 DOI: 10.1016/s0039-128x(03)00044-8] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
1alpha,25(OH)(2)D(3) activates protein kinase C (PKC) in rat growth plate chondrocytes via mechanisms involving phosphatidylinositol-specific phospholipase C (PI-PLC) and phospholipase A(2) (PLA(2)). The purpose of this study was to determine if 1alpha,25(OH)(2)D(3) activates PI-PLC directly or through a PLA(2)-dependent mechanism. We determined which PLC isoforms are present in the growth plate chondrocytes, and determined which isoform(s) of PLC is(are) regulated by 1alpha,25(OH)(2)D(3). Inhibitors and activators of PLA(2) were used to assess the inter-relationship between these two phospholipid-signaling pathways. PI-PLC activity in lysates of prehypertrophic and upper hypertrophic zone (growth zone) cells that were incubated with 1alpha,25(OH)(2)D(3), was increased within 30s with peak activity at 1-3 min. PI-PLC activity in resting zone cells was unaffected by 1alpha,25(OH)(2)D(3). 1beta,25(OH)(2)D(3), 24R,25(OH)(2)D(3), actinomycin D and cycloheximide had no effect on PLC in lysates of growth zone cells. Thus, 1alpha,25(OH)(2)D(3) regulation of PI-PLC enzyme activity is stereospecific, cell maturation-dependent, and nongenomic. PLA(2)-activation (mastoparan or melittin) increased PI-PLC activity to the same extent as 1alpha,25(OH)(2)D(3); PLA(2)-inhibition (quinacrine, oleyloxyethylphosphorylcholine (OEPC), or AACOCF(3)) reduced the effect of 1alpha,25(OH)(2)D(3). Neither arachidonic acid (AA) nor its metabolites affected PI-PLC. In contrast, lysophosphatidylcholine (LPC) and lysophosphatidylethanolamine (LPE) activated PI-PLC (LPE>LPC). 1alpha,25(OH)(2)D(3) stimulated PI-PLC and PKC activities via Gq; GDPbetaS inhibited activity, but pertussis toxin did not. RT-PCR showed that the cells express PLC-beta1a, PLC-beta1b, PLC-beta3 and PLC-gamma1 mRNA. Antibodies to PLC-beta1 and PLC-beta3 blocked the 1alpha,25(OH)(2)D(3) effect; antibodies to PLC-delta and PLC-gamma did not. Thus, 1alpha,25(OH)(2)D(3) regulates PLC-beta through PLA(2)-dependent production of lysophospholipid.
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Affiliation(s)
- Z Schwartz
- Department of Biomedical Engineering, Georgia Institute of Technology, 315 Ferst Drive, Atlanta, GA 30332, USA
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25
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Buitrago CG, Pardo VG, de Boland AR, Boland R. Activation of RAF-1 through Ras and protein kinase Calpha mediates 1alpha,25(OH)2-vitamin D3 regulation of the mitogen-activated protein kinase pathway in muscle cells. J Biol Chem 2003; 278:2199-205. [PMID: 12417593 DOI: 10.1074/jbc.m205732200] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We have previously shown that stimulation of proliferation of avian embryonic muscle cells (myoblasts) by 1alpha,25(OH)(2)-vitamin D(3) (1alpha,25(OH)(2)D(3)) is mediated by activation of the mitogen-activated protein kinase (MAPK; ERK1/2). To understand how 1alpha,25(OH)(2)D(3) up-regulates the MAPK cascade, we have investigated whether the hormone acts upstream through stimulation of Raf-1 and the signaling mechanism by which this effect might take place. Treatment of chick myoblasts with 1alpha,25(OH)(2)D(3) (1 nm) caused a fast increase of Raf-1 serine phosphorylation (1- and 3-fold over basal at 1 and 2 min, respectively), indicating activation of Raf-1 by the hormone. These effects were abolished by preincubation of cells with a specific Ras inhibitor peptide that involves Ras in 1alpha,25(OH)(2)D(3) stimulation of Raf-1. 1alpha,25(OH)(2)D(3) rapidly induced tyrosine de-phosphorylation of Ras-GTPase-activating protein, suggesting that inhibition of Ras-GTP hydrolysis is part of the mechanism by which 1alpha,25(OH)(2)D(3) activates Ras in myoblasts. The protein kinase C (PKC) inhibitors calphostin C, bisindolylmaleimide I, and Ro 318220 blocked 1alpha,25(OH)(2)D(3)-induced Raf-1 serine phosphorylation, revealing that hormone stimulation of Raf-1 also involves PKC. In addition, transfection of muscle cells with an antisense oligodeoxynucleotide against PKCalpha mRNA suppressed serine phosphorylation by 1alpha,25(OH)(2)D(3). The increase in MAPK activity and tyrosine phosphorylation caused by 1alpha,25(OH)(2)D(3) could be abolished by Ras inhibitor peptide, compound PD 98059, which prevents the activation of MEK by Raf-1, or incubation of cell lysates before 1alpha,25(OH)(2)D(3) exposure with an anti-Raf-1 antibody. In conclusion, these results demonstrate for the first time in a 1alpha,25(OH)(2)D(3) target cell that activation of Raf-1 via Ras and PKCalpha-dependent serine phosphorylation plays a central role in hormone stimulation of the MAPK-signaling pathway leading to muscle cell proliferation.
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Affiliation(s)
- Claudia Graciela Buitrago
- Departamento de Biología, Bioquímica and Farmacia, Universidad Nacional del Sur, San Juan 670, 8000 Bahia Blanca, Argentina
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Hara H, Yasunami Y, Adachi T. Alteration of cellular phosphorylation state affects vitamin D receptor-mediated CYP3A4 mRNA induction in Caco-2 cells. Biochem Biophys Res Commun 2002; 296:182-8. [PMID: 12147248 DOI: 10.1016/s0006-291x(02)00860-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Expression of cytochrome P450 3A4 (CYP3A4) is induced by 1,25-dihydroxyvitamin D(3)(1,25(OH)(2)D(3)) in Caco-2 cells. However, since a typical vitamin D responsive element has not been found in the 5(')-flanking region of the CYP3A4 gene, the mechanism of 1,25(OH)(2)D(3)-induced CYP3A4 mRNA expression is poorly understood. In the present study, we demonstrated that vitamin D receptor (VDR) is a critical factor for the induction using the antisense oligonucleotide technique. In addition, we found that treatment of Caco-2 cells with the protein kinase C (PKC) inhibitors, staurosporine and GF109203X, and the tyrosine kinase inhibitor, genistein, but not with the protein kinase A inhibitor, H-89, suppressed CYP3A4 mRNA induction by 1,25(OH)(2)D(3). The depletion of PKC by prolonged treatment with phorbol ester abolished the induction. On the other hand, protein kinase inhibitors used had no effects on the constitutive expression of VDR mRNA. Therefore, these observations suggest that 1,25(OH)(2)D(3)-induced CYP3A4 mRNA expression might be involved in phosphorylation events in addition to transcriptional regulation via VDR. However, 1,25(OH)(2)D(3) did not rapidly activate PKC in the Caco-2 cells used, while the treatment with staurosporine and GF109203X, but not genistein, decreased basal PKC activity by approximately 30% of the controls. Taken together, these findings suggest that the change in the phosphorylation state via PKC and tyrosine kinase might, at least in part, modulate 1,25(OH)(2)D(3)-induced CYP3A4 mRNA expression via VDR.
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Affiliation(s)
- Hirokazu Hara
- Laboratory of Clinical Pharmaceutics, Gifu Pharmaceutical University, 5-6-1 Mitahora-higashi, 502-8585, Gifu, Japan.
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Rebsamen MC, Sun J, Norman AW, Liao JK. 1alpha,25-dihydroxyvitamin D3 induces vascular smooth muscle cell migration via activation of phosphatidylinositol 3-kinase. Circ Res 2002; 91:17-24. [PMID: 12114317 DOI: 10.1161/01.res.0000025269.60668.0f] [Citation(s) in RCA: 115] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The steroid hormone 1alpha,25-dihydroxyvitamin D3 [1alpha, 25-(OH)2D3] promotes vascular smooth muscle cell (VSMC) growth and calcification, but the precise mechanism by which 1alpha, 25-(OH)2D3 regulates VSMC migration is unknown. In rat aortic SMCs, we found that 1alpha, 25-(OH)2D3 (0.1 to 100 nmol/L) induced a dose-dependent increase in VSMC migration. This response required the activation of phosphatidylinositol 3-kinase (PI3 kinase) because 1alpha, 25-(OH)2D3-induced migration was completely abolished by the PI3 kinase inhibitors, LY294002 (10 micromol/L) or wortmannin (30 nmol/L). Furthermore, the RNA polymerase inhibitor, 5,6-dichlorobenzimidazole riboside (50 micromol/L), did not affect 1alpha, 25-(OH)2D3-induced VSMC migration, suggesting that gene transcription is not involved in this rapid response. Using analogs of 1alpha, 25-(OH)2D3, which have been characterized for their abilities to induce either transcriptional or nontranscriptional responses of 1alpha, 25-(OH)2D3, we found that 1alpha,25-dihydroxylumisterol, which is a potent agonist of the rapid, nongenomic responses, was equipotent with 1alpha, 25-(OH)2D3 in inducing PI3 kinase activity and VSMC migration. Moreover, 1beta, 25-(OH)2D3, which specifically antagonizes the nongenomic actions of 1alpha, 25-(OH)2D3, abolished 1alpha, 25-(OH)2D3-induced PI3 kinase activity and VSMC migration, whereas the inhibitor of the genomic actions of vitamin D, (23S)-25-dehydro-1alpha-OH-D3-26,23-lactone, did not affect these responses. These results indicate that 1alpha, 25-(OH)2D3 induces VSMC migration independent of gene transcription via PI3 kinase pathway, and suggest a possible mechanism by which 1alpha, 25-(OH)2D3 may contribute to neointima formation in atherosclerosis and vascular remodeling.
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MESH Headings
- Animals
- Blotting, Western
- Calcitriol/pharmacology
- Cell Adhesion/drug effects
- Cell Movement/drug effects
- Cells, Cultured
- Dichlororibofuranosylbenzimidazole/pharmacology
- Dose-Response Relationship, Drug
- Enzyme Activation/drug effects
- Enzyme Inhibitors/pharmacology
- Ergosterol/analogs & derivatives
- Ergosterol/pharmacology
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/metabolism
- Osteopontin
- Phosphatidylinositol 3-Kinases/metabolism
- RNA Polymerase II/antagonists & inhibitors
- RNA Polymerase II/metabolism
- Rats
- Rats, Sprague-Dawley
- Sialoglycoproteins/biosynthesis
- Sialoglycoproteins/drug effects
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Affiliation(s)
- Michela C Rebsamen
- Vascular Medicine Research, Brigham and Women's Hospital and Harvard Medical School, Cambridge, Mass 02139, USA
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28
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Boland R, De Boland AR, Buitrago C, Morelli S, Santillán G, Vazquez G, Capiati D, Baldi C. Non-genomic stimulation of tyrosine phosphorylation cascades by 1,25(OH)(2)D(3) by VDR-dependent and -independent mechanisms in muscle cells. Steroids 2002; 67:477-82. [PMID: 11960624 DOI: 10.1016/s0039-128x(01)00182-9] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Studies with different cell types have shown that modulation of various of the fast as well as long-term responses to 1,25(OH)(2)D(3) depends on the activation of tyrosine kinase pathways. Recent investigations of our laboratory have demonstrated that 1,25(OH)(2)D(3) rapidly stimulates in muscle cells tyrosine phosphorylation of PLC-gamma and the growth-related proteins MAPK and c-myc. We have now obtained evidence using antisense technology indicating that VDR-dependent activation of Src mediates the fast stimulation of tyrosine phosphorylation of c-myc elicited by the hormone. This non-genomic action of 1,25(OH)(2)D(3) requires tyrosine phosphorylation of the VDR. Immunoprecipitation under native conditions coupled to Western blot analysis revealed 1,25(OH)(2)D(3)-dependent formation of complexes between Src and the VDR and c-myc. However, the activation of MAPK by the hormone was only partially mediated by the VDR and required in addition increased PKC and intracellular Ca(2+). Following its phosphorylation, MAPK translocates into the nucleus where it regulates c-myc transcription. Altogether these results indicate that tyrosine phosphorylation plays a role in the stimulation of muscle cell growth by 1,25(OH)(2)D(3). Data were also obtained involving tyrosine kinases and the VDR in hormone regulation of the Ca(2+) messenger system by mediating the stimulation of store-operated calcium (SOC; TRP) channels. Congruent with this action, 1,25(OH)(2)D(3) induces a rapid translocation of the VDR to the plasma cell membrane which can be blocked by tyrosine kinase inhibitors. Of mechanistic relevance, an association between the VDR and TRP proteins with the participation of the scaffold protein INAD was shown.
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Affiliation(s)
- Ricardo Boland
- Departamento de Biología, Bioquímica & Farmacia, Universidad Nacional del Sur, San Juan 670, (8000) Bahia Blanca, Argentina.
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29
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Buitrago C, González Pardo V, de Boland AR. Nongenomic action of 1 alpha,25(OH)(2)-vitamin D3. Activation of muscle cell PLC gamma through the tyrosine kinase c-Src and PtdIns 3-kinase. EUROPEAN JOURNAL OF BIOCHEMISTRY 2002; 269:2506-15. [PMID: 12027889 DOI: 10.1046/j.1432-1033.2002.02915.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We have previously demonstrated that the steroid hormone 1 alpha,25(OH)(2)-vitamin D(3)[1 alpha,25(OH)(2)D(3)] stimulates the production of inositol trisphosphate (InsP(3)), the breakdown product of phosphatidylinositol 4,5-biphosphate (PtdInsP(2)) by phospholipase C (PtdIns-PLC), and activates the cytosolic tyrosine kinase c-Src in skeletal muscle cells. In the present study we examined whether 1 alpha,25(OH)(2)D(3) induces the phosphorylation and membrane translocation of PLC gamma and the mechanism involved in this isozyme activation. We found that the steroid hormone triggers a significant phosphorylation on tyrosine residues of PLC gamma and induces a rapid increase in membrane-associated PLC gamma immunoreactivity with a time course that correlates with that of phosphorylation in muscle cells. Genistein, a tyrosine kinase inhibitor, blocked the phosphorylation of PLC gamma. Inhibition of 1 alpha,25(OH)(2)D(3)-induced c-Src activity by its specific inhibitor PP1 or muscle cell transfection with an antisense oligodeoxynucleotide directed against c-Src mRNA, prevented hormone stimulation of PLC gamma tyrosine phosphorylation. The isozyme phosphorylation is also blocked by both wortmannin and LY294002, two structurally different inhibitors of phosphatidyl inositol 3-kinase (PtdIns3K), the enzyme that produces PtdInsP(3) known to activate PLC gamma isozymes specifically by interacting with their SH2 and pleckstrin homology domains. The hormone also increases the physical association of c-Src and PtdIns3K with PLC gamma and induces a c-Src-dependent tyrosine phosphorylation of the p85 regulatory subunit of PtdIns3K. The time course of hormone-dependent PLC gamma phosphorylation closely correlates with the time course of its redistribution to the membrane, suggesting that phosphorylation and redistribution to the membrane of PLC gamma are two interdependent events. 1 alpha,25(OH)(2)D(3)-induced membrane translocation of PLC gamma was prevented to a great extent by c-Src and PtdIns3K inhibitors, PP1 and LY294002. Taken together, the present data indicates that the cytosolic tyrosine kinase c-Src and PtdIns 3-kinase play indispensable roles in 1 alpha,25(OH)(2)D(3) signal transduction cascades leading to PLC gamma activation.
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Affiliation(s)
- Claudia Buitrago
- Department Biología, Bioquímica & Farmacia. Universidad Nacional del Sur, San Juan Bahia Blanca, Argentina
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30
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Buitrago C, Vazquez G, De Boland AR, Boland R. The vitamin D receptor mediates rapid changes in muscle protein tyrosine phosphorylation induced by 1,25(OH)(2)D(3). Biochem Biophys Res Commun 2001; 289:1150-6. [PMID: 11741312 DOI: 10.1006/bbrc.2001.6072] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
It has been recently shown that the fast non-genomic responses of 1,25(OH)(2)-vitamin D(3) [1,25(OH)(2)D(3)] in skeletal muscle cells involve tyrosine phosphorylation of MAP kinase (ERK1/2), c-Src kinase and the oncoprotein c-myc. In the present work, blockade of vitamin D receptor (VDR) expression (> or =80%) by preincubation of chick embryonic muscle cells with three different antisense oligonucleotides against the VDR mRNA (AS-VDR ODNs) significantly reduced (-94%) 1,25(OH)(2)D(3) stimulation of c-myc tyrosine phosphorylation and inhibited c-Src tyrosine dephosphorylation implying lack of c-Src activation by the hormone. Coimmunoprecipitation experiments revealed that 1,25(OH)(2)D(3) induces the formation of complexes between c-Src and c-myc, in agreement with the above results and previous studies showing hormone-dependent association between c-Src and tyrosine phosphorylated VDR and c-Src mediated c-myc tyrosine phosphorylation. MAPK tyrosine phosphorylation by 1,25(OH)(2)D(3) was affected to a lesser extent (-35%) by transfection with AS-VDR ODNs implying that both VDR-dependent and VDR-independent signalling mediate hormone stimulation of MAPK. These are the first results providing direct evidence on the participation of the VDR in non-genomic 1,25(OH)(2)D(3) signal transduction. Activation of tyrosine phosphorylation cascades through this mechanism may contribute to hormone regulation of muscle growth.
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Affiliation(s)
- C Buitrago
- Departamento de Biología, Bioquímica and Farmacia, Universidad Nacional del Sur., Bahía Blanca, San Juan 670, 8000, Argentina
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31
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Buitrago C, Boland R, de Boland AR. The tyrosine kinase c-Src is required for 1,25(OH)2-vitamin D3 signalling to the nucleus in muscle cells. BIOCHIMICA ET BIOPHYSICA ACTA 2001; 1541:179-87. [PMID: 11755212 DOI: 10.1016/s0167-4889(01)00142-2] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
We have recently shown that the hormonal form of vitamin D3, 1,25(OH)2-vitamin D3 (1,25(OH)2D3), stimulates the enzymatic activity of the non-receptor protein tyrosine kinase c-Src in skeletal muscle cells. In this study we show that intracellular and extracellular Ca2+ chelation with BAPTA and EGTA, respectively, blocked hormone stimulation of c-Src activity/dephosphorylation, indicating that the calcium messenger system is an upstream activator of c-Src. Tyrosine phosphorylation and stimulation of the growth-related mitogen-activated protein kinase (MAPK) by 1,25(OH)2D3 was shown to be dependent on activation of c-Src, since pretreatment with the c-Src specific inhibitor PP1 or muscle cell transfection with an antisense oligodeoxynucleotide directed against c-Src mRNA markedly reduced hormone stimulation of MAPK phosphorylation. Evidence was obtained indicating that MAPK is then translocated to the cell nucleus in active phosphorylated form and induces the expression of c-myc oncoprotein, as the MAPK kinase (MEK) inhibitor PD98059 abolished stimulation of c-myc synthesis by 1,25(OH)2D3. In addition, the hormone rapidly stimulated tyrosine phosphorylation of c-myc. In cells pretreated with PP1 (4-amino-5-(4-methylphenyl)-7-(t-butyl)pyrazolo-D3,4-pyrimidine), the 1,25(OH)2D3-induced increase in tyrosine phosphorylation of c-myc was suppressed. Taken together, these results demonstrate that 1,25(OH)2D3 stimulates proliferation-associated signalling pathways in skeletal muscle cells and implicate c-Src kinase as mediator of this response.
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Affiliation(s)
- C Buitrago
- Departamento de Biologia, Bioquímica y Farmacia, Universidad Nacional del Sur, San Juan 670, 8000, Bahia Blanca, Argentina
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32
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Morelli S, Buitrago C, Boland R, de Boland AR. The stimulation of MAP kinase by 1,25(OH)(2)-vitamin D(3) in skeletal muscle cells is mediated by protein kinase C and calcium. Mol Cell Endocrinol 2001; 173:41-52. [PMID: 11223176 DOI: 10.1016/s0303-7207(00)00435-4] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In previous work we have demonstrated that the steroid hormone 1,25(OH)(2)-vitamin D(3) [1,25(OH)(2)D(3)] stimulates in skeletal muscle cells the phosphorylation and activity of the extracellular signal-regulated mitogen-activated protein (MAP) kinase isoforms ERK1 and ERK2. In the present study we evaluated the involvement of Ca(2+) and protein kinase C (PKC) on 1,25(OH)(2)D(3)-induced activation of MAP kinase. The hormone response was found to depend on PKC stimulation since it was attenuated by the PKC inhibitors calphostin C (100 nM) and bisindolylmaleimide I (30 nM) and PKC downregulation by prolonged treatment with the phorbol ester TPA (1 microM). Removal of external Ca(2+), chelation of intracellular Ca(2+) with BAPTA (5 microM), inhibition of phosphoinositide-phospholipase C (PLC) by neomycin, the calmodulin antagonist fluphenazine (50 microM) and the specific inhibitor of calmodulin kinase II, KN-62 (10 microM), significantly decreased 1,25(OH)(2)D(3)-activation of MAP kinase. In addition, the Ca(2+)-channel blocker verapamil (5 microM) suppressed hormone-induced MAP kinase activity in these cells. Furthermore, the Ca(2+)-mobilizing agent thapsigargin and the Ca(2+)-inophore A23187 paralleled the phosphorylation of MAP kinase observed with 1,25(OH)(2)D(3). Taken together, these results indicate that PKC and Ca(2+) are two upstream activators mediating the effects of 1,25(OH)(2)D(3) on MAP kinase in skeletal muscle cells.
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Affiliation(s)
- S Morelli
- Departamento de Biologia, Bioquímica and Farmacia, Universidad Nacional del Sur, San Juan 670, 8000, Bahia Blanca, Argentina
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