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Treiber G, Prietl B, Fröhlich-Reiterer E, Lechner E, Ribitsch A, Fritsch M, Rami-Merhar B, Steigleder-Schweiger C, Graninger W, Borkenstein M, Pieber TR. Cholecalciferol supplementation improves suppressive capacity of regulatory T-cells in young patients with new-onset type 1 diabetes mellitus - A randomized clinical trial. Clin Immunol 2015; 161:217-24. [PMID: 26277548 DOI: 10.1016/j.clim.2015.08.002] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Revised: 07/28/2015] [Accepted: 08/07/2015] [Indexed: 12/14/2022]
Abstract
It is unknown if cholecalciferol is able to modify defects in regulatory T cells (Tregs) in type 1 diabetes (T1D). In this randomized, double-blind, placebo controlled trial 30 young patients with new-onset T1D were assigned to cholecalciferol (70IU/kgbodyweight/day) or placebo for 12months. Tregs were determined by FACS-analysis and functional tests were assessed with ex vivo suppression co-cultures at months 0, 3, 6 and 12. Suppressive capacity of Tregs increased (p<0.001) with cholecalciferol from baseline (-1.59±25.6%) to 3 (30.5±39.4%), 6 (44.6±23.8%) and 12months (37.2±25.0%) and change of suppression capacity from baseline to 12months was significantly higher (p<0.05) with cholecalciferol (22.2±47.2%) than placebo (-16.6±21.1%). Serum calcium and parathormone stayed within normal range. This is the first study, which showed that cholecalciferol improved suppressor function of Tregs in patients with T1D and vitamin D could serve as one possible agent in the development of immunomodulatory combination therapies for T1D.
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Affiliation(s)
- Gerlies Treiber
- Division of Endocrinology and Metabolism, Medical University Graz, Auenbruggerplatz 15, 8036 Graz, Austria.
| | - Barbara Prietl
- Division of Endocrinology and Metabolism, Medical University Graz, Auenbruggerplatz 15, 8036 Graz, Austria.
| | - Elke Fröhlich-Reiterer
- Department of General Paediatrics, Medical University Graz, Auenbruggerplatz 34, 8036 Graz, Austria.
| | - Evelyne Lechner
- Division of Endocrinology and Metabolism, Medical University Graz, Auenbruggerplatz 15, 8036 Graz, Austria.
| | - Anja Ribitsch
- Division of Endocrinology and Metabolism, Medical University Graz, Auenbruggerplatz 15, 8036 Graz, Austria.
| | - Maria Fritsch
- Department of Paediatrics, Medical University Vienna, Währinger Gürtel 18-20, 1090 Wien, Austria.
| | - Birgit Rami-Merhar
- Department of Paediatrics, Medical University Vienna, Währinger Gürtel 18-20, 1090 Wien, Austria.
| | - Claudia Steigleder-Schweiger
- Department of Paediatrics, Paracelsus Medical University Salzburg, Müllner Hauptstraße 48, 5020 Salzburg, Austria.
| | - Winfried Graninger
- Division of Rheumatology and Immunology, Medical University Graz, Auenbruggerplatz 15, 8036 Graz, Austria.
| | - Martin Borkenstein
- Department of General Paediatrics, Medical University Graz, Auenbruggerplatz 34, 8036 Graz, Austria.
| | - Thomas R Pieber
- Division of Endocrinology and Metabolism, Medical University Graz, Auenbruggerplatz 15, 8036 Graz, Austria.
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102
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Jeffery LE, Qureshi OS, Gardner D, Hou TZ, Briggs Z, Soskic B, Baker J, Raza K, Sansom DM. Vitamin D Antagonises the Suppressive Effect of Inflammatory Cytokines on CTLA-4 Expression and Regulatory Function. PLoS One 2015; 10:e0131539. [PMID: 26134669 PMCID: PMC4489761 DOI: 10.1371/journal.pone.0131539] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Accepted: 06/03/2015] [Indexed: 12/12/2022] Open
Abstract
The immune suppressive protein CTLA-4 is constitutively expressed by Tregs and induced in effector T cells upon activation. Its crucial role in adaptive immunity is apparent from the fatal autoimmune pathology seen in CTLA-4 knockout mice. However, little is known regarding factors that regulate CTLA-4 expression and their effect upon its function to remove CD80 and CD86 from antigen presenting cells by transendocytosis. Th17 cells are emerging as significant players in autoimmunity as well as other diseases. Therefore, in this study we have examined the effects of Th17 polarising conditions on CTLA-4 expression and function in human T cells and show that Th17 conditions can suppress the expression of CTLA-4 and its transendocytic function. In contrast to Th17 cells, vitamin D is inversely associated with autoimmune disease. We have previously shown a striking ability of 1,25 dihydroxyvitamin D3 (1,25(OH)2D3) to enhance CTLA-4, however, its effects upon B7 transendocytosis and its activity in the context of inflammation remained unknown. Here we show that induction of CTLA-4 by 1,25(OH)2D3 can actually be enhanced in the presence of Th17 polarising cytokines. Furthermore, its transendocytic function was maintained such that T cells generated in the presence of Th17 conditions and 1,25(OH)2D3 were highly effective at capturing CTLA-4 ligands from antigen presenting cells and suppressing T cell division. Taken together, these data reveal an inhibitory effect of Th17 polarising conditions upon CTLA-4-mediated regulation and show that 1,25(OH)2D3 counteracts this effect. Given the importance of CTLA-4-mediated suppression in the control of autoimmune diseases, our novel data highlight the importance of vitamin D in inflammatory settings.
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Affiliation(s)
- Louisa E. Jeffery
- Medical Research Council Centre for Immune Regulation, School of Immunity and Infection, Institute of Biomedical Research, University of Birmingham Medical School, Birmingham, United Kingdom
| | - Omar S. Qureshi
- Medical Research Council Centre for Immune Regulation, School of Immunity and Infection, Institute of Biomedical Research, University of Birmingham Medical School, Birmingham, United Kingdom
| | - David Gardner
- Medical Research Council Centre for Immune Regulation, School of Immunity and Infection, Institute of Biomedical Research, University of Birmingham Medical School, Birmingham, United Kingdom
| | - Tie Z. Hou
- UCL Institute of Immunity and Transplantation, Royal Free Campus, University College London, London, United Kingdom
| | - Zoe Briggs
- Medical Research Council Centre for Immune Regulation, School of Immunity and Infection, Institute of Biomedical Research, University of Birmingham Medical School, Birmingham, United Kingdom
| | - Blagoje Soskic
- UCL Institute of Immunity and Transplantation, Royal Free Campus, University College London, London, United Kingdom
| | - Jennifer Baker
- Medical Research Council Centre for Immune Regulation, School of Immunity and Infection, Institute of Biomedical Research, University of Birmingham Medical School, Birmingham, United Kingdom
| | - Karim Raza
- Medical Research Council Centre for Immune Regulation, School of Immunity and Infection, Institute of Biomedical Research, University of Birmingham Medical School, Birmingham, United Kingdom
- Department of Rheumatology, Sandwell and West Birmingham Hospitals NHS Trust, Birmingham, United Kingdom
- * E-mail:
| | - David M. Sansom
- UCL Institute of Immunity and Transplantation, Royal Free Campus, University College London, London, United Kingdom
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103
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Sommer A, Fabri M. Vitamin D regulates cytokine patterns secreted by dendritic cells to promote differentiation of IL-22-producing T cells. PLoS One 2015; 10:e0130395. [PMID: 26107738 PMCID: PMC4480856 DOI: 10.1371/journal.pone.0130395] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Accepted: 05/20/2015] [Indexed: 12/17/2022] Open
Abstract
One central mechanism, by which vitamin D regulates human immune responses, is the direct modulation of dendritic cells (DCs). However, the effect of vitamin D on several key DC functions, such as the secretion of central inflammatory cytokines, remains controversial. Moreover, whether vitamin D treatment of DCs regulates their ability to promote differentiation of IL-17-/IL-22-producing T cell subsets, such as Th17 and Th22 cell, is not known. Here, we report that vitamin D treatment during differentiation of monocytes into DCs markedly enhanced their ability to secrete TNF-α, IL-6, IL-1β and IL-23. Cytokines secreted by vitamin D-treated DC were significantly more potent in driving differentiation of IL-22-producing T cells, but not IL-17-producing T cells, as compared to secreted cytokines of not-vitamin D-treated DCs. Finally, we found that the differentiation of IL-22-producing T cells mediated by supernatants of vitamin D-treated DCs was dependent on TNF-α IL-6 and IL-23. In summary, our study suggests a novel role of vitamin D in regulating DC-mediated immune responses in humans.
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Affiliation(s)
- Andrea Sommer
- Department of Dermatology, University of Cologne, Cologne, Germany
- Center for Molecular Medicine Cologne, University of Cologne, Cologne, Germany
| | - Mario Fabri
- Department of Dermatology, University of Cologne, Cologne, Germany
- Center for Molecular Medicine Cologne, University of Cologne, Cologne, Germany
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104
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Morris A, Shanmugasundaram R, McDonald J, Selvaraj RK. Effect of in vitro and in vivo 25-hydroxyvitamin D treatment on macrophages, T cells, and layer chickens during a coccidia challenge12. J Anim Sci 2015; 93:2894-903. [DOI: 10.2527/jas.2014-8866] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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105
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Modulation of the immune response to respiratory viruses by vitamin D. Nutrients 2015; 7:4240-70. [PMID: 26035247 PMCID: PMC4488782 DOI: 10.3390/nu7064240] [Citation(s) in RCA: 277] [Impact Index Per Article: 30.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Revised: 05/17/2015] [Accepted: 05/19/2015] [Indexed: 02/06/2023] Open
Abstract
Background: Vitamin D deficiency has been shown to be independently associated with increased risk of viral acute respiratory infection (ARI) in a number of observational studies, and meta-analysis of clinical trials of vitamin D supplementation for prevention of ARI has demonstrated protective effects. Several cellular studies have investigated the effects of vitamin D metabolites on immune responses to respiratory viruses, but syntheses of these reports are lacking. Scope: In this article, we review the literature reporting results of in vitro experiments investigating immunomodulatory actions of vitamin D metabolites in human respiratory epithelial cells infected with respiratory viruses. Key findings: Vitamin D metabolites do not consistently influence replication or clearance of rhinovirus, respiratory syncytial virus (RSV) or influenza A virus in human respiratory epithelial cell culture, although they do modulate expression and secretion of type 1 interferon, chemokines including CXCL8 and CXCL10 and pro-inflammatory cytokines, such as TNF and IL-6. Future research: More studies are needed to clarify the effects of vitamin D metabolites on respiratory virus-induced expression of cell surface markers mediating viral entry and bacterial adhesion to respiratory epithelial cells.
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106
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Vitamin D every day to keep the infection away? Nutrients 2015; 7:4170-88. [PMID: 26035244 PMCID: PMC4488779 DOI: 10.3390/nu7064170] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 05/13/2015] [Accepted: 05/15/2015] [Indexed: 02/07/2023] Open
Abstract
Within the last decade, vitamin D has emerged as a central regulator of host defense against infections. In this regard, vitamin D triggers effective antimicrobial pathways against bacterial, fungal and viral pathogens in cells of the human innate immune system. However, vitamin D also mediates potent tolerogenic effects: it is generally believed that vitamin D attenuates inflammation and acquired immunity, and thus potentially limits collateral tissue damage. Nevertheless, several studies indicate that vitamin D promotes aspects of acquired host defense. Clinically, vitamin D deficiency has been associated with an increased risk for various infectious diseases in epidemiological studies; yet, robust data from controlled trials investigating the use of vitamin D as a preventive or therapeutic agent are missing. In this review, we summarize the current knowledge regarding the effect of vitamin D on innate and acquired host defense, and speculate on the difficulties to translate the available molecular medicine data into practical therapeutic or preventive recommendations.
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107
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Maeda SS, Borba VZC, Camargo MBR, Silva DMW, Borges JLC, Bandeira F, Lazaretti-Castro M. Recommendations of the Brazilian Society of Endocrinology and Metabology (SBEM) for the diagnosis and treatment of hypovitaminosis D. ACTA ACUST UNITED AC 2015; 58:411-33. [PMID: 25166032 DOI: 10.1590/0004-2730000003388] [Citation(s) in RCA: 122] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Accepted: 06/18/2014] [Indexed: 12/14/2022]
Abstract
OBJECTIVE The objective is to present an update on the diagnosis and treatment of hypovitaminosis D, based on the most recent scientific evidence. MATERIALS AND METHODS The Department of Bone and Mineral Metabolism of the Brazilian Society of Endocrinology and Metabology (SBEM) was invited to generate a document following the rules of the Brazilian Medical Association (AMB) Guidelines Program. Data search was performed using PubMed, Lilacs and SciELO and the evidence was classified in recommendation levels, according to the scientific strength and study type. CONCLUSION A scientific update regarding hypovitaminosis D was presented to serve as the basis for the diagnosis and treatment of this condition in Brazil.
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Affiliation(s)
- Sergio Setsuo Maeda
- Disciplina de Endocrinologia, Universidade Federal de São Paulo, Escola Paulista de Medicina, São Paulo, SP, Brasil
| | - Victoria Z C Borba
- Departamento de Clínica Médica, Universidade Federal do Paraná, Curitiba, PR, Brasil
| | | | | | | | - Francisco Bandeira
- Disciplina de Endocrinologia, Hospital Agamenon Magalhães, Escola de Medicina, Universidade de Pernambuco, Recife, PE, Brasil
| | - Marise Lazaretti-Castro
- Disciplina de Endocrinologia, Universidade Federal de São Paulo, Escola Paulista de Medicina, São Paulo, SP, Brasil
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108
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Gröschel C, Tennakoon S, Kállay E. Cytochrome P450 Vitamin D Hydroxylases in Inflammation and Cancer. ADVANCES IN PHARMACOLOGY 2015; 74:413-58. [PMID: 26233913 DOI: 10.1016/bs.apha.2015.03.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Vitamin D insufficiency correlates with increased incidence of inflammatory disorders and cancer of the colon, breast, liver, and prostate. Preclinical studies demonstrated that the hormonally active form of vitamin D, 1,25(OH)2D3, has antiproliferative, proapoptotic, anti-inflammatory, and immunomodulatory effects. Tissue levels of 1,25(OH)2D3 are determined by expression and activity of specific vitamin D hydroxylases expressed at renal and extrarenal sites. In order to understand how perturbations in the vitamin D system affect human health, we need to understand the steps involved in the synthesis and catabolism of the active metabolite. This review provides an overview about recent findings on the altered vitamin D metabolism in inflammatory conditions and carcinogenesis. We will summarize existing data on the pathophysiological regulation of vitamin D hydroxylases and outline the role of adequate levels of 1,25(OH)2D3 on tissue homeostasis.
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Affiliation(s)
- Charlotte Gröschel
- Department of Pathophysiology and Allergy Research, Center of Pathophysiology, Infectiology & Immunology, Medical University of Vienna, Währinger Gürtel, Vienna, Austria
| | - Samawansha Tennakoon
- Department of Pathophysiology and Allergy Research, Center of Pathophysiology, Infectiology & Immunology, Medical University of Vienna, Währinger Gürtel, Vienna, Austria
| | - Enikö Kállay
- Department of Pathophysiology and Allergy Research, Center of Pathophysiology, Infectiology & Immunology, Medical University of Vienna, Währinger Gürtel, Vienna, Austria.
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109
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Kim YS, Sayers TJ, Colburn NH, Milner JA, Young HA. Impact of dietary components on NK and Treg cell function for cancer prevention. Mol Carcinog 2015; 54:669-78. [PMID: 25845339 DOI: 10.1002/mc.22301] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Revised: 12/09/2014] [Accepted: 01/21/2015] [Indexed: 01/11/2023]
Abstract
An important characteristic of cancer is that the disease can overcome the surveillance of the immune system. A possible explanation for this resistance arises from the ability of tumor cells to block the tumoricidal activity of host immune cells such as natural killer (NK) cells by inducing the localized accumulation of regulatory T (Treg) cells. Evidence exists that components in commonly consumed foods including vitamins A, D, and E, water-soluble constituents of mushrooms, polyphenolics in fruits and vegetables, and n-3 fatty acids in fish oil can modulate NK cell activities, Treg cell properties, and the interactions between those two cell types. Thus, it is extremely important for cancer prevention to understand the involvement of dietary components with the early stage dynamics of interactions among these immune cells. This review addresses the potential significance of diet in supporting the function of NK cells, Treg cells, and the balance between those two cell types, which ultimately results in decreased cancer risk.
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Affiliation(s)
- Young S Kim
- Nutritional Science Research Group, Division of Cancer Prevention, National Cancer Institute, Rockville, Maryland
| | - Thomas J Sayers
- Frederick National Laboratory, Center for Cancer Research, NCI, Frederick, Maryland
| | - Nancy H Colburn
- Frederick National Laboratory, Center for Cancer Research, NCI, Frederick, Maryland
| | - John A Milner
- Human Nutrition Research Center, USDA/ARS, Beltsville, Maryland
| | - Howard A Young
- Frederick National Laboratory, Center for Cancer Research, NCI, Frederick, Maryland
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110
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Nimitphong H, Sritara C, Chailurkit LO, Chanprasertyothin S, Ratanachaiwong W, Sritara P, Ongphiphadhanakul B. Relationship of vitamin D status and bone mass according to vitamin D-binding protein genotypes. Nutr J 2015; 14:29. [PMID: 25890042 PMCID: PMC4389666 DOI: 10.1186/s12937-015-0016-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Accepted: 03/03/2015] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Vitamin D-binding protein (DBP) may alter the biological activity of total 25-hydroxyvitamin D [25(OH)D]; this could influence on the effects of vitamin D in relation to bone mineral density (BMD) and fractures. Emerging data suggest that fetuin-A may be involved in bone metabolism. We aimed to investigate the influence of DBP gene polymorphism on the relationship of vitamin D status and fetuin-A levels to BMD and bone markers. METHODS This cross-sectional study was part of a health survey of employees of the Electricity Generating Authority of Thailand (1,734 healthy subjects, 72% male). Fasting blood samples were assayed for 25(OH)D, fetuin-A, N-terminal propeptides of type 1 procollagen (P1NP), C-terminal cross-linking telopeptides of type I collagen (CTx-I), and DBP rs2282679 genotypes. L1-L4 lumbar spine and femoral BMD were measured using dual-energy X-ray absorptiometry. RESULTS The DBP rs2282679 genotype distribution conformed to the Hardy-Weinberg equilibrium. There were no correlations between 25(OH)D levels and BMD and bone markers. But a trend of positive correlation was observed for the DBP genotypes with total hip BMD, and for the interaction between 25(OH)D and DBP genotypes with BMD at all femoral sites. We further analyzed data according to DBP genotypes. Only in subjects with the AA (common) genotype, 25(OH)D levels were positively related to BMD and bone markers, while fetuin-A was negatively related to total hip BMD, independently of age, gender and BMI. CONCLUSIONS The interaction between vitamin D status, as measured by circulating 25(OH)D and DBP rs2282679 genotypes, modified the association between 25(OH)D and BMD and bone markers. Differences in DBP genotypes additionally influenced the correlation of fetuin-A levels with femoral BMD.
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Affiliation(s)
- Hataikarn Nimitphong
- Department of Medicine and Research Center, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Rama VI Road, Ratchathewi, Bangkok, 10400, Thailand.
| | - Chanika Sritara
- Department of Radiology, Ramathibodi Hospital, Mahidol University, Rama VI Road, Ratchathewi, Bangkok, 10400, Thailand.
| | - La-Or Chailurkit
- Department of Medicine and Research Center, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Rama VI Road, Ratchathewi, Bangkok, 10400, Thailand.
| | - Suwannee Chanprasertyothin
- Department of Medicine and Research Center, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Rama VI Road, Ratchathewi, Bangkok, 10400, Thailand.
| | - Wipa Ratanachaiwong
- Health Office, Electricity Generating Authority of Thailand, Nonthaburi, 11130, Thailand.
| | - Piyamitr Sritara
- Department of Medicine and Research Center, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Rama VI Road, Ratchathewi, Bangkok, 10400, Thailand.
| | - Boonsong Ongphiphadhanakul
- Department of Medicine and Research Center, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Rama VI Road, Ratchathewi, Bangkok, 10400, Thailand.
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111
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Hayes CE, Hubler SL, Moore JR, Barta LE, Praska CE, Nashold FE. Vitamin D Actions on CD4(+) T Cells in Autoimmune Disease. Front Immunol 2015; 6:100. [PMID: 25852682 PMCID: PMC4364365 DOI: 10.3389/fimmu.2015.00100] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Accepted: 02/23/2015] [Indexed: 12/11/2022] Open
Abstract
This review summarizes and integrates research on vitamin D and CD4+ T-lymphocyte biology to develop new mechanistic insights into the molecular etiology of autoimmune disease. A deep understanding of molecular mechanisms relevant to gene–environment interactions is needed to deliver etiology-based autoimmune disease prevention and treatment strategies. Evidence linking sunlight, vitamin D, and the risk of multiple sclerosis and type 1 diabetes is summarized to develop the thesis that vitamin D is the environmental factor that most strongly influences autoimmune disease development. Evidence for CD4+ T-cell involvement in autoimmune disease pathogenesis and for paracrine calcitriol signaling to CD4+ T lymphocytes is summarized to support the thesis that calcitriol is sunlight’s main protective signal transducer in autoimmune disease risk. Animal modeling and human mechanistic data are summarized to support the view that vitamin D probably influences thymic negative selection, effector Th1 and Th17 pathogenesis and responsiveness to extrinsic cell death signals, FoxP3+CD4+ T-regulatory cell and CD4+ T-regulatory cell type 1 (Tr1) cell functions, and a Th1–Tr1 switch. The proposed Th1–Tr1 switch appears to bridge two stable, self-reinforcing immune states, pro- and anti-inflammatory, each with a characteristic gene regulatory network. The bi-stable switch would enable T cells to integrate signals from pathogens, hormones, cell–cell interactions, and soluble mediators and respond in a biologically appropriate manner. Finally, unanswered questions and potentially informative future research directions are highlighted to speed delivery of etiology-based strategies to reduce autoimmune disease.
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Affiliation(s)
- Colleen Elizabeth Hayes
- Department of Biochemistry, College of Agricultural and Life Sciences, University of Wisconsin-Madison , Madison, WI , USA
| | - Shane L Hubler
- Department of Statistics, College of Letters and Sciences, University of Wisconsin-Madison , Madison, WI , USA
| | - Jerott R Moore
- Department of Biochemistry, College of Agricultural and Life Sciences, University of Wisconsin-Madison , Madison, WI , USA
| | - Lauren E Barta
- Department of Biochemistry, College of Agricultural and Life Sciences, University of Wisconsin-Madison , Madison, WI , USA
| | - Corinne E Praska
- Department of Biochemistry, College of Agricultural and Life Sciences, University of Wisconsin-Madison , Madison, WI , USA
| | - Faye E Nashold
- Department of Biochemistry, College of Agricultural and Life Sciences, University of Wisconsin-Madison , Madison, WI , USA
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112
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Tamblyn JA, Hewison M, Wagner CL, Bulmer JN, Kilby MD. Immunological role of vitamin D at the maternal-fetal interface. J Endocrinol 2015; 224:R107-21. [PMID: 25663707 DOI: 10.1530/joe-14-0642] [Citation(s) in RCA: 122] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
During pregnancy, immune activity is tightly regulated so that antimicrobial protection of the mother and fetus is balanced with the need for immune tolerance to prevent fetal rejection. In this setting, the maternal-fetal interface, in the form of the uterine decidua, provides a heterogeneous immune cell population with the potential to mediate diverse activities throughout pregnancy. Recent studies have suggested that vitamin D may be a key regulator of immune function during pregnancy, with the fetal-maternal interface representing a prominent target. Among its non-classical actions are potent immunomodulatory effects, including induction of antibacterial responses and modulation of T-lymphocytes to suppress inflammation and promote tolerogenesis. Thus, vitamin D may play a pivotal role in normal decidual immune function by promoting innate responses to infection, while simultaneously preventing an over-elaboration of inflammatory adaptive immunity. Research to date has focused upon the potential role of vitamin D in preventing infectious diseases such as tuberculosis, as well as possibly suppressing of autoimmune disease. Nevertheless, vitamin D may also influence facets of immune function not immediately associated with primary innate responses. This review summarises our current understanding of decidual immune function with respect to the vitamin D metabolism and signalling, and as to how this may be affected by variations in maternal vitamin D status. There has recently been much interest in vitamin D supplementation of pregnant women, but our knowledge of how this may influence the function of decidua remains limited. Further insight into the immunomodulatory actions of vitamin D during pregnancy will help shed light upon this.
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Affiliation(s)
- J A Tamblyn
- College of Medical and Dental SciencesCentre for Women's and Children's HealthCollege of Medical and Dental SciencesCentre of Endocrinology, Diabetes and Metabolism (CEDAM), University of Birmingham, Edgbaston, Birmingham B15 2TT, UKDepartments of PediatricsBiochemistry, and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina 29425, USAReproductive and Vascular Biology GroupInstitute of Cellular Medicine, Newcastle University, Newcastle upon Tyne NE2 4HH, UKFetal Medicine CentreBirmingham Women's Foundation Trust, Birmingham B15 2TG, UK College of Medical and Dental SciencesCentre for Women's and Children's HealthCollege of Medical and Dental SciencesCentre of Endocrinology, Diabetes and Metabolism (CEDAM), University of Birmingham, Edgbaston, Birmingham B15 2TT, UKDepartments of PediatricsBiochemistry, and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina 29425, USAReproductive and Vascular Biology GroupInstitute of Cellular Medicine, Newcastle University, Newcastle upon Tyne NE2 4HH, UKFetal Medicine CentreBirmingham Women's Foundation Trust, Birmingham B15 2TG, UK
| | - M Hewison
- College of Medical and Dental SciencesCentre for Women's and Children's HealthCollege of Medical and Dental SciencesCentre of Endocrinology, Diabetes and Metabolism (CEDAM), University of Birmingham, Edgbaston, Birmingham B15 2TT, UKDepartments of PediatricsBiochemistry, and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina 29425, USAReproductive and Vascular Biology GroupInstitute of Cellular Medicine, Newcastle University, Newcastle upon Tyne NE2 4HH, UKFetal Medicine CentreBirmingham Women's Foundation Trust, Birmingham B15 2TG, UK
| | - C L Wagner
- College of Medical and Dental SciencesCentre for Women's and Children's HealthCollege of Medical and Dental SciencesCentre of Endocrinology, Diabetes and Metabolism (CEDAM), University of Birmingham, Edgbaston, Birmingham B15 2TT, UKDepartments of PediatricsBiochemistry, and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina 29425, USAReproductive and Vascular Biology GroupInstitute of Cellular Medicine, Newcastle University, Newcastle upon Tyne NE2 4HH, UKFetal Medicine CentreBirmingham Women's Foundation Trust, Birmingham B15 2TG, UK
| | - J N Bulmer
- College of Medical and Dental SciencesCentre for Women's and Children's HealthCollege of Medical and Dental SciencesCentre of Endocrinology, Diabetes and Metabolism (CEDAM), University of Birmingham, Edgbaston, Birmingham B15 2TT, UKDepartments of PediatricsBiochemistry, and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina 29425, USAReproductive and Vascular Biology GroupInstitute of Cellular Medicine, Newcastle University, Newcastle upon Tyne NE2 4HH, UKFetal Medicine CentreBirmingham Women's Foundation Trust, Birmingham B15 2TG, UK
| | - M D Kilby
- College of Medical and Dental SciencesCentre for Women's and Children's HealthCollege of Medical and Dental SciencesCentre of Endocrinology, Diabetes and Metabolism (CEDAM), University of Birmingham, Edgbaston, Birmingham B15 2TT, UKDepartments of PediatricsBiochemistry, and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina 29425, USAReproductive and Vascular Biology GroupInstitute of Cellular Medicine, Newcastle University, Newcastle upon Tyne NE2 4HH, UKFetal Medicine CentreBirmingham Women's Foundation Trust, Birmingham B15 2TG, UK College of Medical and Dental SciencesCentre for Women's and Children's HealthCollege of Medical and Dental SciencesCentre of Endocrinology, Diabetes and Metabolism (CEDAM), University of Birmingham, Edgbaston, Birmingham B15 2TT, UKDepartments of PediatricsBiochemistry, and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina 29425, USAReproductive and Vascular Biology GroupInstitute of Cellular Medicine, Newcastle University, Newcastle upon Tyne NE2 4HH, UKFetal Medicine CentreBirmingham Women's Foundation Trust, Birmingham B15 2TG, UK College of Medical and Dental SciencesCentre for Women's and Children's HealthCollege of Medical and Dental SciencesCentre of Endocrinology, Diabetes and Metabolism (CEDAM), University of Birmingham, Edgbaston, Birmingham B15 2TT, UKDepartments of PediatricsBiochemistry, and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina 29425, USAReproductive and Vascular Biology GroupInstitute of Cellular Medicine, Newcastle University, Newcastle upon Tyne NE2 4HH, UKFetal Medicine CentreBirmingham Women's Foundation Trust, Birmingham B15 2TG, UK
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113
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Grant WB, Wimalawansa SJ, Holick MF, Cannell JJ, Pludowski P, Lappe JM, Pittaway M, May P. Emphasizing the health benefits of vitamin D for those with neurodevelopmental disorders and intellectual disabilities. Nutrients 2015; 7:1538-64. [PMID: 25734565 PMCID: PMC4377865 DOI: 10.3390/nu7031538] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Revised: 01/16/2015] [Accepted: 02/05/2015] [Indexed: 02/06/2023] Open
Abstract
People with neurodevelopmental disorders and intellectual disabilities have much greater health care needs. Mainly staying indoors, such people generally have low 25-hydroxyvitamin D (25(OH)D) concentrations. The Vitamin D Task Force of the American Academy of Developmental Medicine and Dentistry (AADMD) reviewed the evidence of 25(OH)D concentrations that benefit the health of persons with developmental disabilities. Maintaining recommended optimal serum 25(OH)D concentrations year long will benefit skeletal development in infants, children, and adolescents, and benefit musculoskeletal health and neuromuscular coordination in adult patients, and decrease risk of falls. Maintaining optimal concentrations decreases risks and severities of autoimmune diseases, cardiovascular disease, many types of cancer, dementia, types 1 and 2 diabetes mellitus, and respiratory tract infections. Other benefits include improved dental and oral health and improved physical performance. The Task Force recommends that 25(OH)D concentrations for optimal health to be in the range of 75 to 125 nmol/L, which can be achieved using between 800 and 4000 IU/day vitamin D3 and sensible exposure to solar UVB radiation. The paper also discusses the potential risks of higher 25(OH)D concentrations, the evidence from and limitations of randomized controlled trials, and the recommendations by various groups and agencies.
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Affiliation(s)
- William B Grant
- Sunlight, Nutrition, and Health Research Center, PO Box 641603, San Francisco, CA 94164-1603, USA.
| | - Sunil J Wimalawansa
- Department of Medicine & Endocrinology, Cardio Metabolic Institute, Somerset, NJ 08873, USA.
| | - Michael F Holick
- Department of Medicine, Section of Endocrinology, Nutrition, and Diabetes, and the Vitamin D, Skin, and Bone Research Laboratory, Boston University Medical Center, Boston, MA 02118, USA.
| | - John J Cannell
- Vitamin D Council and San Luis Obispo Integrative Medicine, San Luis Obispo, CA 93401, USA.
| | - Pawel Pludowski
- Department of Biochemistry, Radioimmunology, and Experimental Medicine, The Children's Memorial Health Institute, 04-730 Warsaw, Poland.
| | - Joan M Lappe
- Creighton University School of Medicine, Omaha, NE 68131, USA.
| | - Mary Pittaway
- Global Clinical Advisor-Health Promotion, Special Olympics International and Affiliate Faculty, College of Education and Human Sciences, University of Montana, Missoula, MT 59812, USA.
| | - Philip May
- International Foundation for Chronic Disabilities, Inc., PO Box 166, Oxford, NJ 07863, USA.
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114
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Watkins RR, Lemonovich TL, Salata RA. An update on the association of vitamin D deficiency with common infectious diseases. Can J Physiol Pharmacol 2015; 93:363-8. [PMID: 25741906 DOI: 10.1139/cjpp-2014-0352] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Vitamin D plays an important role in modulating the immune response to infections. Deficiency of vitamin D is a common condition, affecting both the general population and patients in health care facilities. Over the last decade, an increasing body of evidence has shown an association between vitamin D deficiency and an increased risk for acquiring several infectious diseases, as well as poorer outcomes in vitamin D deficient patients with infections. This review details recent developments in understanding the role of vitamin D in immunity, the antibacterial actions of vitamin D, the association between vitamin D deficiency and common infections (like sepsis, pneumonia, influenza, methicillin-resistant Staphylococcus aureus, human immunodeficiency virus type-1 (HIV), and hepatitis C virus (HCV)), potential therapeutic implications for vitamin D replacement, and future research directions.
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Affiliation(s)
- Richard R Watkins
- Department of Internal Medicine, Northeast Ohio Medical University, Rootstown, OH 44272, USA., Division of Infectious Diseases, Akron General Medical Center, Akron, OH 44302, USA
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115
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Increased circulating levels of vitamin D binding protein in MS patients. Toxins (Basel) 2015; 7:129-37. [PMID: 25590278 PMCID: PMC4303818 DOI: 10.3390/toxins7010129] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Accepted: 01/05/2015] [Indexed: 11/29/2022] Open
Abstract
Vitamin D (vitD) low status is currently considered a main environmental factor in multiple sclerosis (MS) etiology and pathogenesis. VitD and its metabolites are highly hydrophobic and circulate mostly bound to the vitamin D binding protein (DBP) and with lower affinity to albumin, while less than 1% are in a free form. The aim of this study was to investigate whether the circulating levels of either of the two vitD plasma carriers and/or their relationship are altered in MS. We measured DBP and albumin plasma levels in 28 MS patients and 24 healthy controls. MS patients were found to have higher DBP levels than healthy subjects. Concomitant interferon beta therapy did not influence DBP concentration, and the difference with the control group was significant in both females and males. No significant correlation between DBP and albumin levels was observed either in healthy controls or in patients. These observations suggest the involvement of DBP in the patho-physiology of MS.
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116
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Jones A, D'Vaz N, Meldrum S, Palmer D, Zhang G, Prescott S. 25-hydroxyvitamin D3 status is associated with developing adaptive and innate immune responses in the first 6 months of life. Clin Exp Allergy 2014; 45:220-31. [DOI: 10.1111/cea.12449] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Revised: 10/27/2014] [Accepted: 10/31/2014] [Indexed: 12/23/2022]
Affiliation(s)
- A.P. Jones
- School of Paediatrics and Child Health; University of Western Australia; Perth WA Australia
- Telethon Kids Institute; University of Western Australia; Perth WA Australia
| | - N. D'Vaz
- School of Paediatrics and Child Health; University of Western Australia; Perth WA Australia
- Telethon Kids Institute; University of Western Australia; Perth WA Australia
| | - S. Meldrum
- School of Paediatrics and Child Health; University of Western Australia; Perth WA Australia
- Telethon Kids Institute; University of Western Australia; Perth WA Australia
| | - D.J. Palmer
- School of Paediatrics and Child Health; University of Western Australia; Perth WA Australia
- Telethon Kids Institute; University of Western Australia; Perth WA Australia
- ‘In-FLAME’ the International Inflammation Network; Worldwide Universities Network (WUN); Perth WA Australia
| | - G. Zhang
- School of Paediatrics and Child Health; University of Western Australia; Perth WA Australia
- School of Public Health; Curtin University of Technology; Perth WA Australia
| | - S.L. Prescott
- School of Paediatrics and Child Health; University of Western Australia; Perth WA Australia
- Telethon Kids Institute; University of Western Australia; Perth WA Australia
- ‘In-FLAME’ the International Inflammation Network; Worldwide Universities Network (WUN); Perth WA Australia
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117
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Proteomic Analysis in Serum of Rat Hind-Limb Allograft Tolerance Induced by Immunosuppressive Therapy with Adipose-Derived Stem Cells. Plast Reconstr Surg 2014; 134:1213-1223. [DOI: 10.1097/prs.0000000000000725] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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118
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Abstract
Vitamin D deficiency has been linked to an increased risk of a wide range of adverse health outcomes. The active form of vitamin D has an important role in calcium metabolism and in bone mineralisation, but the evidence for other health outcomes is mixed, with the strongest effects seen in the weakest epidemiological study designs. There are plausible pathways whereby vitamin D deficiency can impair immune function, resulting in both overactivity and increased risk of autoimmune disease, as well as immune suppression with poorer resistance to infection. Vitamin D status may influence the bacterial flora that constitute the microbiome and affect immune function through this route. Exposure of the skin to ultraviolet radiation causes the production of a range of chemicals, including vitamin D, and new research is exploring possible vitamin D-independent immunomodulatory pathways.
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Affiliation(s)
- Robyn M. Lucas
- Telethon Kids Institute, University of Western Australia100 Roberts Road, Subiaco, PerthAustralia 6008
- National Centre for Epidemiology and Population Health, The Australian National UniversityCanberraAustralia 0200
| | - Shelley Gorman
- Telethon Kids Institute, University of Western Australia100 Roberts Road, Subiaco, PerthAustralia 6008
| | - Sian Geldenhuys
- Telethon Kids Institute, University of Western Australia100 Roberts Road, Subiaco, PerthAustralia 6008
| | - Prue H. Hart
- Telethon Kids Institute, University of Western Australia100 Roberts Road, Subiaco, PerthAustralia 6008
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119
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The vitamin D to ameliorate multiple sclerosis (VIDAMS) trial: study design for a multicenter, randomized, double-blind controlled trial of vitamin D in multiple sclerosis. Contemp Clin Trials 2014; 39:288-93. [PMID: 25311447 DOI: 10.1016/j.cct.2014.10.004] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Revised: 09/30/2014] [Accepted: 10/04/2014] [Indexed: 02/07/2023]
Abstract
BACKGROUND Lower levels of vitamin D are associated with increased MS risk and with greater clinical and brain MRI activity in established relapsing MS. OBJECTIVE The VIDAMS trial (NCT01490502) is evaluating whether high-dose vitamin D supplementation reduces the risk of MS activity. DESIGN/METHODS Eligibility criteria include diagnosis of RRMS, age 18 to 50 years, and Expanded Disability Status Scale ≤4.0. Disease duration and activity requirements depend on whether 2005 or 2010 criteria are used for diagnosis. Enrollment is restricted based on prior MS therapy exposure and recent vitamin D use. After completing a one-month run-in of glatiramer acetate, 172 patients will be randomized 1:1 to oral vitamin D(3) 5000 IU versus 600 IU daily. Clinical visits occur every 12 weeks for 96 weeks. RESULTS Sixteen sites throughout the United States are participating in the trial. Complete enrollment is expected by late 2014, with follow-up through 2016. No interim analyses are planned. The primary outcome for the trial is the proportion of patients experiencing a relapse in each group. Other clinical, patient-reported, and MRI outcomes will be evaluated. CONCLUSIONS The VIDAMS trial will provide critical information about the safety and efficacy of vitamin D therapy in RRMS, with implications for MS patients worldwide.
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120
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Effect of cholecalciferol supplementation on inflammation and cellular alloimmunity in hemodialysis patients: data from a randomized controlled pilot trial. PLoS One 2014; 9:e109998. [PMID: 25296334 PMCID: PMC4190314 DOI: 10.1371/journal.pone.0109998] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Accepted: 09/02/2014] [Indexed: 12/15/2022] Open
Abstract
Background Memory T-cells are mediators of transplant injury, and no therapy is known to prevent the development of cross-reactive memory alloimmunity. Activated vitamin D is immunomodulatory, and vitamin D deficiency, common in hemodialysis patients awaiting transplantation, is associated with a heightened alloimmune response. Thus, we tested the hypothesis that vitamin D3 supplementation would prevent alloreactive T-cell memory formation in vitamin D-deficient hemodialysis patients. Methods and Findings We performed a 12-month single-center pilot randomized, controlled trial of 50,000 IU/week of cholecalciferol (D3) versus no supplementation in 96 hemodialysis patients with serum 25(OH)D<25 ng/mL, measuring effects on serum 25(OH)D and phenotypic and functional properties of T-cells. Participants were randomized 2∶1 to active treatment versus control. D3 supplementation increased serum 25(OH)D at 6 weeks (13.5 [11.2] ng/mL to 42.5 [18.5] ng/mL, p<0.001) and for the duration of the study. No episodes of sustained hypercalcemia occurred in either group. Results of IFNγ ELISPOT-based panel of reactive T-cell assays (PRT), quantifying alloreactive memory, demonstrated greater increases in the controls over 1 year compared to the treatment group (delta PRT in treatment 104.8+/−330.8 vs 252.9+/−431.3 in control), but these changes in PRT between groups did not reach statistical significance (p = 0.25). Conclusions D3 supplements are safe, effective at treating vitamin D deficiency, and may prevent time-dependent increases in T-cell alloimmunity in hemodialysis patients, but their effects on alloimmunity need to be confirmed in larger studies. These findings support the routine supplementation of vitamin D-deficient transplant candidates on hemodialysis and highlight the need for large-scale prospective studies of vitamin D supplementation in transplant candidates and recipients. Trial Registration Clinicaltrials.gov NCT01175798
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121
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Chun RF, Peercy BE, Orwoll ES, Nielson CM, Adams JS, Hewison M. Vitamin D and DBP: the free hormone hypothesis revisited. J Steroid Biochem Mol Biol 2014; 144 Pt A:132-7. [PMID: 24095930 PMCID: PMC3976473 DOI: 10.1016/j.jsbmb.2013.09.012] [Citation(s) in RCA: 299] [Impact Index Per Article: 29.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Revised: 09/20/2013] [Accepted: 09/24/2013] [Indexed: 12/21/2022]
Abstract
The last five years have witnessed a remarkable renaissance in vitamin D research and a complete re-evaluation of its benefits to human health. Two key factors have catalyzed these changes. First, it now seems likely that localized, tissue-specific, conversion of 25-hydroxyvitamin D (25OHD) to 1,25-dihydroxyvitamin D (1,25(OH)2D) drives many of the newly recognized effects of vitamin D on human health. The second key factor concerns the ongoing discussion as to what constitutes adequate or optimal serum vitamin D (25OHD) status, with the possibility that vitamin D-deficiency is common to communities across the globe. These two concepts appear to be directly linked when low serum concentrations of 25OHD compromise intracrine generation of 1,25(OH)2D within target tissues. But, is this an over-simplification? Pro-hormone 25OHD is a lipophilic molecule that is transported in the circulation bound primarily to vitamin D binding protein (DBP). While the association between 25OHD and DBP is pivotal for renal handling of 25OHD and endocrine synthesis of 1,25(OH)2D, what is the role of DBP for extra-renal synthesis of 1,25(OH)2D? We hypothesize that binding to DBP impairs delivery of 25OHD to the vitamin D-activating enzyme 1α-hydroxylase in some target cells. Specifically, it is unbound, 'free' 25OHD that drives many of the non-classical actions of vitamin D. Levels of 'free' 25OHD are dependent on the concentration of DBP and alternative serum binding proteins such as albumin, but will also be influenced by variations in DBP binding affinity for specific vitamin D metabolites. The aim of this review will be to discuss the merits of 'free 25OHD' as an alternative marker of vitamin D status, particularly in the context of non-classical responses to vitamin D. This article is part of a Special Issue entitled '16th Vitamin D Workshop'.
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Affiliation(s)
- Rene F Chun
- Orthopaedic Hospital Research Center, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Bradford E Peercy
- Department of Mathematics and Statistics, University of Maryland, Baltimore County, Baltimore, MD 21250, USA
| | - Eric S Orwoll
- Department of Public Health and Preventive Medicine, Oregon Health & Science University, Portland, OR 97201, USA
| | - Carrie M Nielson
- Department of Public Health and Preventive Medicine, Oregon Health & Science University, Portland, OR 97201, USA
| | - John S Adams
- Orthopaedic Hospital Research Center, University of California Los Angeles, Los Angeles, CA 90095, USA; Molecular Biology Institute, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Martin Hewison
- Orthopaedic Hospital Research Center, University of California Los Angeles, Los Angeles, CA 90095, USA; Molecular Biology Institute, University of California Los Angeles, Los Angeles, CA 90095, USA.
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122
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Todd JJ, Pourshahidi LK, McSorley EM, Madigan SM, Magee PJ. Vitamin D: Recent Advances and Implications for Athletes. Sports Med 2014; 45:213-29. [DOI: 10.1007/s40279-014-0266-7] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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123
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Vitamin D-binding protein controls T cell responses to vitamin D. BMC Immunol 2014; 15:35. [PMID: 25230725 PMCID: PMC4177161 DOI: 10.1186/s12865-014-0035-2] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Accepted: 08/29/2014] [Indexed: 12/24/2022] Open
Abstract
Background In vitro studies have shown that the active form of vitamin D3, 1α,25-dihydroxyvitamin D3 (1,25(OH)2D3), can regulate differentiation of CD4+ T cells by inhibiting Th1 and Th17 cell differentiation and promoting Th2 and Treg cell differentiation. However, the serum concentration of 1,25(OH)2D3 is far below the effective concentration of 1,25(OH)2D3 found in in vitro studies, and it has been suggested that 1,25(OH)2D3 must be produced locally from the inactive precursor 25-hydroxyvitamin D3 (25(OH)D3) to affect ongoing immune responses in vivo. Although it has been reported that activated T cells express the 25(OH)D-1α-hydroxylase CYP27B1 that converts 25(OH)D3 to 1,25(OH)2D3, it is still controversial whether activated T cells have the capacity to produce sufficient amounts of 1,25(OH)2D3 to affect vitamin D-responsive genes. Furthermore, it is not known how the vitamin D-binding protein (DBP) found in high concentrations in serum affects T cell responses to 25(OH)D3. Results We found that activated T cells express CYP27B1 and have the capacity to produce sufficient 1,25(OH)2D3 to affect vitamin D-responsive genes when cultured with physiological concentrations of 25(OH)D3 in serum-free medium. However, if the medium was supplemented with serum or purified DBP, DBP strictly inhibited the production of 1,25(OH)2D3 and 25(OH)D3-induced T cell responses. In contrast, DBP did not inhibit the effect of exogenous 1,25(OH)2D3. Actin, arachidonic acid and albumin did not affect the sequestration of 25(OH)D3 by DBP, whereas carbonylation of DBP did. Conclusions Activated T cells express CYP27B1 and can convert 25(OH)D3 to 1,25(OH)2D3 in sufficiently high concentrations to affect vitamin D-responsive genes when cultured in serum-free medium. However, DBP sequesters 25(OH)D3 and inhibits the production of 1,25(OH)2D3 in T cells. To fully exploit the immune-regulatory potential of vitamin D, future studies of the mechanisms that enable the immune system to exploit 25(OH)D3 and convert it to 1,25(OH)2D3in vivo are required. Electronic supplementary material The online version of this article (doi:10.1186/s12865-014-0035-2) contains supplementary material, which is available to authorized users.
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124
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Chambers ES, Suwannasaen D, Mann EH, Urry Z, Richards DF, Lertmemongkolchai G, Hawrylowicz CM. 1α,25-dihydroxyvitamin D3 in combination with transforming growth factor-β increases the frequency of Foxp3⁺ regulatory T cells through preferential expansion and usage of interleukin-2. Immunology 2014; 143:52-60. [PMID: 24673126 PMCID: PMC4137955 DOI: 10.1111/imm.12289] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Revised: 02/28/2014] [Accepted: 03/19/2014] [Indexed: 01/22/2023] Open
Abstract
A high prevalence of vitamin D insufficiency and deficiency exists worldwide, which is associated with an increased incidence and severity of a range of immune-mediated diseases. This has resulted in considerable interest in the immunodulatory functions of vitamin D. The active form of vitamin D, 1α,25-dihydroxyvitamin D3 [1,25(OH)2D3], has been shown to increase the frequency of Foxp3+ CD4+ T regulatory (Treg) cells when present at high concentrations or under strong T-cell stimulation in culture. Supporting evidence exists in vivo for a positive association between serum 25(OH)D and Foxp3+ Treg cell numbers in humans. The aim of this work was to identify the cytokine milieu required in vitro to promote Foxp3+ Treg cells in cultures containing 1,25(OH)2D3 at more moderate concentrations (10−7 m). Stimulation of human CD4+ T cells with a combination of 1,25(OH)2D3 and transforming growth factor-β (TGF-β) greatly increased the frequency of Foxp3+ Treg cells, which is proposed to result from the preferential expansion of Foxp3+ Treg cells, as compared with the Foxp3− effector T cells, in culture. The differential effect on proliferation may result from enhanced availability and usage of interleukin-2 by the Foxp3+ Treg cells compared with Foxp3− effector T cells. In summary, modulation of the cytokine environment to one high in TGF-β in the presence of 1,25(OH)2D3 (10−7 m) significantly increased Foxp3+ Treg cell frequency. These data provide additional evidence for the important immunomodulatory properties of 1,25(OH)2D3 that exist and may help to control inflammatory diseases.
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Affiliation(s)
- Emma S Chambers
- MRC and Asthma-UK Centre for Allergic Mechanisms in Asthma, King's College London, London, UK
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125
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Lowry MB, Guo C, Borregaard N, Gombart AF. Regulation of the human cathelicidin antimicrobial peptide gene by 1α,25-dihydroxyvitamin D3 in primary immune cells. J Steroid Biochem Mol Biol 2014; 143:183-91. [PMID: 24565560 PMCID: PMC4127358 DOI: 10.1016/j.jsbmb.2014.02.004] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Revised: 02/12/2014] [Accepted: 02/15/2014] [Indexed: 01/08/2023]
Abstract
Production of the human cathelicidin antimicrobial peptide gene (hCAP18/LL-37), is regulated by 1α,25-dihydroxyvitamin D3 (1,25D3) and is critical in the killing of pathogens by innate immune cells. In addition, secreted LL-37 binds extracellular receptors and modulates the recruitment and activity of both innate and adaptive immune cells. Evidence suggests that during infections activated immune cells locally produce increased levels of 1,25D3 thus increasing production of hCAP18/LL-37. The relative expression levels of hCAP18/LL-37 among different immune cell types are not well characterized. The aim of this study was to determine the relative levels of hCAP18/LL-37 in human peripheral blood immune cells and determine to what extent 1,25D3 increased its expression in peripheral blood-derived cells. We show for the first time, a hierarchy of expression of hCAP18 in freshly isolated cells with low levels in lymphocytes, intermediate levels in monocytes and the highest levels found in neutrophils. In peripheral blood-derived cells, the highest levels of hCAP18 following treatment with 1,25D3 were in macrophages, while comparatively lower levels were found in GM-CSF-derived dendritic cells and osteoclasts. We also tested whether treatment with parathyroid hormone in combination with 1,25D3 would enhance hCAP18 induction as has been reported in skin cells, but we did not find enhancement in any immune cells tested. Our results indicate that hCAP18 is expressed at different levels according to cell type and lineage. Furthermore, potent induction of hCAP18 by 1,25D3 in macrophages and dendritic cells may modulate functions of both innate and adaptive immune cells at sites of infection.
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Affiliation(s)
- Malcolm B Lowry
- Linus Pauling Institute, Oregon State University, Corvallis, OR 97331, USA; Department of Microbiology, Oregon State University, Corvallis, OR 97331, USA
| | - Chunxiao Guo
- Linus Pauling Institute, Oregon State University, Corvallis, OR 97331, USA; Department of Biochemistry and Biophysics, Oregon State University, Corvallis, OR 97331, USA
| | - Niels Borregaard
- Department of Hematology, Rigshospitalet-4042, University of Copenhagen, Copenhagen DK-1200, Denmark
| | - Adrian F Gombart
- Linus Pauling Institute, Oregon State University, Corvallis, OR 97331, USA; Department of Biochemistry and Biophysics, Oregon State University, Corvallis, OR 97331, USA.
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126
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Bratke K, Wendt A, Garbe K, Kuepper M, Julius P, Lommatzsch M, Virchow JC. Vitamin D binding protein and vitamin D in human allergen-induced endobronchial inflammation. Clin Exp Immunol 2014; 177:366-72. [PMID: 24730464 DOI: 10.1111/cei.12346] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/07/2014] [Indexed: 01/02/2023] Open
Abstract
Allergic asthma is a chronic disease of the airways associated with airway hyperresponsiveness, a variable degree of airflow obstruction, airway remodelling and a characteristic airway inflammation. Factors of the vitamin D axis, which include vitamin D metabolites and vitamin D binding protein (VDBP), have been linked to asthma, but only few data exist about their regulation in the lung during acute allergen-induced airway inflammation. Therefore, we analysed the regulation of factors of the vitamin D axis during the early- and late-phase reaction of allergic asthma. Fifteen patients with mild allergic asthma underwent segmental allergen challenge. VDBP was analysed in bronchoalveolar lavage fluid (BALF) and serum using the enzyme-linked immunosorbent assay (ELISA) technique. 25-hydroxyvitamin D(3)[25(OH)D(3)] and 1,25-dihydroxyvitamin D(3)[1,25(OH)(2)D(3)] were analysed by a commercial laboratory using the liquid chromatography-mass spectrometry (LC/MS) technique. VDBP (median 2·3, range 0·2-7·1 μg/ml), 25(OH)D(3) (median 0·060, range < 0·002-3·210 ng/ml) and 1,25(OH)(2)D(3) (median < 0·1, range < 0·1-2·8 pg/ml) were significantly elevated in BALF 24 h but not 10 min after allergen challenge. After correction for plasma leakage using the plasma marker protein albumin, VDBP and 25(OH)D(3) were still increased significantly while 1,25(OH)(2)D(3) was not. VDBP and 25(OH)D(3) were correlated with each other and with the inflammatory response 24 h after allergen challenge. Serum concentrations of all three factors were not influenced by allergen challenge. In conclusion, we report a significant increase in VDBP and 25(OH)D(3) in human BALF 24 h after allergen challenge, suggesting a role for these factors in the asthmatic late-phase reaction.
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Affiliation(s)
- K Bratke
- Department of Pneumology, University of Rostock, Rostock, Germany
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Gaurav R, Agrawal DK. Clinical view on the importance of dendritic cells in asthma. Expert Rev Clin Immunol 2014; 9:899-919. [PMID: 24128155 DOI: 10.1586/1744666x.2013.837260] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Allergic asthma is characterized by airway hyperresponsiveness and inflammation and may lead to airway remodeling in uncontrolled cases. Genetic predisposition to an atopic phenotype plays a major component in the pathophysiology of asthma. However, with tremendous role of epigenetic factors and environmental stimuli in precipitating an immune response, the underlying pathophysiological mechanisms are complicated. Dendritic cells are principal antigen-presenting cells and initiators of the immune response in allergic asthma. Their phenotype, guided by multiple factors may dictate the immune reaction to an allergic or tolerogenic response. Involvement of the local cytokine milieu, microbiome and interplay between immune cells add dimension to the fate of immune response. In addition to allergen exposure, these factors modulate DC phenotype and function. In this article, integration of many factors and pathways associated with the recruitment and activation of DCs in the pathophysiology of allergic asthma is presented in a clinical and translational manner.
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Affiliation(s)
- Rohit Gaurav
- Department of Biomedical Sciences and Center for Clinical and Translational Science, Creighton University School of Medicine, CRISS II Room 510, 2500 California Plaza Omaha, NE 68178, USA
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128
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Roy S, Shrinivas K, Bagchi B. A stochastic chemical dynamic approach to correlate autoimmunity and optimal vitamin-D range. PLoS One 2014; 9:e100635. [PMID: 24971516 PMCID: PMC4074107 DOI: 10.1371/journal.pone.0100635] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Accepted: 05/29/2014] [Indexed: 01/26/2023] Open
Abstract
Motivated by several recent experimental observations that vitamin-D could interact with antigen presenting cells (APCs) and T-lymphocyte cells (T-cells) to promote and to regulate different stages of immune response, we developed a coarse grained but general kinetic model in an attempt to capture the role of vitamin-D in immunomodulatory responses. Our kinetic model, developed using the ideas of chemical network theory, leads to a system of nine coupled equations that we solve both by direct and by stochastic (Gillespie) methods. Both the analyses consistently provide detail information on the dependence of immune response to the variation of critical rate parameters. We find that although vitamin-D plays a negligible role in the initial immune response, it exerts a profound influence in the long term, especially in helping the system to achieve a new, stable steady state. The study explores the role of vitamin-D in preserving an observed bistability in the phase diagram (spanned by system parameters) of immune regulation, thus allowing the response to tolerate a wide range of pathogenic stimulation which could help in resisting autoimmune diseases. We also study how vitamin-D affects the time dependent population of dendritic cells that connect between innate and adaptive immune responses. Variations in dose dependent response of anti-inflammatory and pro-inflammatory T-cell populations to vitamin-D correlate well with recent experimental results. Our kinetic model allows for an estimation of the range of optimum level of vitamin-D required for smooth functioning of the immune system and for control of both hyper-regulation and inflammation. Most importantly, the present study reveals that an overdose or toxic level of vitamin-D or any steroid analogue could give rise to too large a tolerant response, leading to an inefficacy in adaptive immune function.
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Affiliation(s)
- Susmita Roy
- SSCU, Indian Institute of Science, Bangalore, Karnataka, India
| | | | - Biman Bagchi
- SSCU, Indian Institute of Science, Bangalore, Karnataka, India
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Zhang Y, Leung DYM, Goleva E. Anti-inflammatory and corticosteroid-enhancing actions of vitamin D in monocytes of patients with steroid-resistant and those with steroid-sensitive asthma. J Allergy Clin Immunol 2014; 133:1744-52.e1. [PMID: 24418482 PMCID: PMC4040328 DOI: 10.1016/j.jaci.2013.12.004] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2013] [Revised: 12/04/2013] [Accepted: 12/06/2013] [Indexed: 01/11/2023]
Abstract
BACKGROUND Vitamin D is known for its anti-inflammatory effects. OBJECTIVE Vitamin D regulation of responses in patients with steroid-resistant (SR) versus steroid-sensitive (SS) asthma has not been studied. METHODS Peripheral blood cells from 11 patients with SR asthma and 8 patients with SS asthma were preincubated with 1,25-dihydroxyvitamin D (1,25[OH]2D [VitD]), followed by dexamethasone (DEX) treatment and LPS stimulation. LPS-induced phosphorylated p38 mitogen-activated protein kinase (p-p38) in monocytes was examined by means of flow cytometry. Mitogen-activated protein kinase phosphatase-1 (MKP-1) mRNA expression, which inhibits p-p38, was analyzed by means of real-time PCR. Glucocorticoid receptor (GR) binding and histone H4 acetylation in the glucocorticoid response element of the MKP-1 promoter in monocytes were analyzed by means of chromatin immunoprecipitation. RESULTS DEX significantly inhibited LPS-induced p-p38 in monocytes from patients with SS asthma but not those from patients with SR asthma (P < .01). VitD inhibited LPS-induced p-p38 in monocytes from both patient groups (P < .01) but enhanced DEX suppression of LPS-induced p-p38 only in monocytes from patients with SS asthma (P < .01). VitD induced MKP-1 expression and enhanced DEX induction of MKP-1 in both patients with SS asthma and patients with SR asthma. VitD/DEX-induced MKP-1 mRNA levels remained significantly lower in monocytes from patients with SR asthma (P < .05). DEX-stimulated recruitment of GR and histone H4 acetylation at the glucocorticoid response element 4.6 kbp upstream of the MKP-1 gene were significantly lower in monocytes from patients with SR asthma compared with those from patients with SS asthma. VitD pretreatment enhanced DEX-induced GR binding and histone acetylation in monocytes from both patient groups. However, GR binding and histone H4 acetylation remained significantly lower in monocytes from patients with SR asthma. CONCLUSION VitD demonstrated anti-inflammatory and corticosteroid-enhancing effects in monocytes of patients with SR asthma and patients with SS asthma. However, the responses to corticosteroids in patients with SR asthma remained significantly lower than those in patients with SS asthma.
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Affiliation(s)
- Yong Zhang
- Department of Pediatrics, National Jewish Health, Denver, Colo
| | - Donald Y M Leung
- Department of Pediatrics, National Jewish Health, Denver, Colo; Department of Pediatrics, University of Colorado Denver, Aurora, Colo
| | - Elena Goleva
- Department of Pediatrics, National Jewish Health, Denver, Colo.
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Augustine MV, Leonard MB, Thayu M, Baldassano RN, de Boer IH, Shults J, Denson LA, DeBoer MD, Herskovitz R, Denburg MR. Changes in vitamin D-related mineral metabolism after induction with anti-tumor necrosis factor-α therapy in Crohn's disease. J Clin Endocrinol Metab 2014; 99:E991-8. [PMID: 24617709 PMCID: PMC4037735 DOI: 10.1210/jc.2013-3846] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
CONTEXT Preclinical studies suggest that TNF-α suppresses PTH synthesis, inhibits renal 1α-hydroxylase activity, and impairs fibroblast growth factor 23 (FGF23) degradation. The impact of inflammation on vitamin D and mineral metabolism has not been well-characterized in Crohn's disease (CD). OBJECTIVE The objective of the study was to assess short-term changes in vitamin D-related mineral metabolism in CD after anti-TNF-α induction therapy. DESIGN/PARTICIPANTS Eighty-seven CD participants, aged 5-39 years, were assessed at the initiation of anti-TNF-α therapy and 10 weeks later. OUTCOMES Indices of clinical disease activity and serum concentrations of vitamin D metabolites, vitamin D-binding protein (DBP), calcium, PTH, FGF23, IL-6, and TNF-α were measured at each visit. A multivariable generalized estimating equation (GEE) regression analysis was used to examine the correlates of PTH and 1,25-dihydroxyvitamin D [1,25(OH)2D] concentrations at each visit. RESULTS After anti-TNF-α therapy, cytokines and inflammatory markers [IL-6, TNF-α, erythrocyte sedimentation rate (ESR), and C-reactive protein (CRP)] concentrations decreased (all P < .0001), and PTH and 1,25(OH)2D concentrations increased (median 21 vs 30 pg/mL, P < .0001, and median 41.7 vs 48.1 pg/mL, P = .014, respectively). Levels of 25-hydroxyvitamin D [25(OH)D], 24,25-dihydroxyvitamin D, DBP, and FGF23 did not change. In GEE analyses, higher IL-6, TNF-α, ESR, and CRP were associated with lower PTH concentrations (all P < .001), adjusted for corrected calcium and 25(OH)D levels. Higher PTH was associated with higher 1,25(OH)2D concentrations (P < .001) at each visit, independent of 25(OH)D concentrations. Higher levels of all inflammatory markers were associated with lower 1,25(OH)2D concentrations (all P < .05). However, when PTH was added to these models, the inflammatory markers (with the exception of CRP) were no longer significantly associated with 1,25(OH)2D. CONCLUSIONS Greater inflammation was associated with lower PTH and 1,25(OH)2D concentrations. After anti-TNF-α induction, PTH and 1,25(OH)2D concentrations increased without concomitant changes in 25(OH)D and FGF23, consistent with effects of inflammation on PTH and thereby renal conversion of 25(OH)D to 1,25(OH)2D.
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Affiliation(s)
- Marianne V Augustine
- The Children's Hospital of Philadelphia (M.V.A., M.B.L., M.T., R.N.B., J.S., R.H., M.R.D.), Perelman School of Medicine at the University of Pennsylvania (M.B.L., R.N.B., J.S., M.R.D.), Philadelphia, Pennsylvania 19104; Kidney Research Institute, University of Washington (I.H.d.B.), Seattle, Washington 98104; Department of Pediatrics, Cincinnati Children's Hospital Medical Center (L.A.D.), Cincinnati, Ohio 45229; and Department of Pediatrics, University of Virginia Health System (M.D.D.), Charlottesville, Virginia 22908
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Kongsbak M, von Essen MR, Boding L, Levring TB, Schjerling P, Lauritsen JPH, Woetmann A, Ødum N, Bonefeld CM, Geisler C. Vitamin D up-regulates the vitamin D receptor by protecting it from proteasomal degradation in human CD4+ T cells. PLoS One 2014; 9:e96695. [PMID: 24792400 PMCID: PMC4008591 DOI: 10.1371/journal.pone.0096695] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Accepted: 04/10/2014] [Indexed: 12/12/2022] Open
Abstract
The active form of vitamin D3, 1,25(OH)2D3, has significant immunomodulatory properties and is an important determinant in the differentiation of CD4+ effector T cells. The biological actions of 1,25(OH)2D3 are mediated by the vitamin D receptor (VDR) and are believed to correlate with the VDR protein expression level in a given cell. The aim of this study was to determine if and how 1,25(OH)2D3 by itself regulates VDR expression in human CD4+ T cells. We found that activated CD4+ T cells have the capacity to convert the inactive 25(OH)D3 to the active 1,25(OH)2D3 that subsequently up-regulates VDR protein expression approximately 2-fold. 1,25(OH)2D3 does not increase VDR mRNA expression but increases the half-life of the VDR protein in activated CD4+ T cells. Furthermore, 1,25(OH)2D3 induces a significant intracellular redistribution of the VDR. We show that 1,25(OH)2D3 stabilizes the VDR by protecting it from proteasomal degradation. Finally, we demonstrate that proteasome inhibition leads to up-regulation of VDR protein expression and increases 1,25(OH)2D3-induced gene activation. In conclusion, our study shows that activated CD4+ T cells can produce 1,25(OH)2D3, and that 1,25(OH)2D3 induces a 2-fold up-regulation of the VDR protein expression in activated CD4+ T cells by protecting the VDR against proteasomal degradation.
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Affiliation(s)
- Martin Kongsbak
- Department of International Health, Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Marina R. von Essen
- Department of International Health, Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Lasse Boding
- Department of International Health, Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Trine B. Levring
- Department of International Health, Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Peter Schjerling
- Institute of Sports Medicine, Department of Orthopedic Surgery M, Bispebjerg Hospital and Center for Healthy Aging, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Jens P. H. Lauritsen
- Department of International Health, Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Anders Woetmann
- Department of International Health, Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Niels Ødum
- Department of International Health, Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Charlotte M. Bonefeld
- Department of International Health, Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Carsten Geisler
- Department of International Health, Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- * E-mail:
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Rolf L, Muris AH, Hupperts R, Damoiseaux J. Vitamin D effects on B cell function in autoimmunity. Ann N Y Acad Sci 2014; 1317:84-91. [DOI: 10.1111/nyas.12440] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Linda Rolf
- School for Mental Health and Neuroscience; Maastricht University Medical Center; Maastricht the Netherlands
- Academic MS Center Limburg; Orbis Medical Center; Sittard the Netherlands
| | - Anne-Hilde Muris
- School for Mental Health and Neuroscience; Maastricht University Medical Center; Maastricht the Netherlands
- Academic MS Center Limburg; Orbis Medical Center; Sittard the Netherlands
| | - Raymond Hupperts
- School for Mental Health and Neuroscience; Maastricht University Medical Center; Maastricht the Netherlands
- Academic MS Center Limburg; Orbis Medical Center; Sittard the Netherlands
| | - Jan Damoiseaux
- Central Diagnostic Laboratory; Maastricht University Medical Center; Maastricht the Netherlands
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Chun RF, Liu PT, Modlin RL, Adams JS, Hewison M. Impact of vitamin D on immune function: lessons learned from genome-wide analysis. Front Physiol 2014; 5:151. [PMID: 24795646 PMCID: PMC4000998 DOI: 10.3389/fphys.2014.00151] [Citation(s) in RCA: 234] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Accepted: 03/30/2014] [Indexed: 12/19/2022] Open
Abstract
Immunomodulatory responses to the active form of vitamin D (1,25-dihydroxyvitamin D, 1,25D) have been recognized for many years, but it is only in the last 5 years that the potential role of this in normal human immune function has been recognized. Genome-wide analyses have played a pivotal role in redefining our perspective on vitamin D and immunity. The description of increased vitamin D receptor (VDR) and 1α-hydroxylase (CYP27B1) expression in macrophages following a pathogen challenge, has underlined the importance of intracrine vitamin D as key mediator of innate immune function. It is now clear that both macrophages and dendritic cells (DCs) are able to respond to 25-hydroxyvitamin D (25D), the major circulating vitamin D metabolite, thereby providing a link between the function of these cells and the variations in vitamin D status common to many humans. The identification of hundreds of primary 1,25D target genes in immune cells has also provided new insight into the role of vitamin D in the adaptive immune system, such as the modulation of antigen-presentation and T cells proliferation and phenotype, with the over-arching effects being to suppress inflammation and promote immune tolerance. In macrophages 1,25D promotes antimicrobial responses through the induction of antibacterial proteins, and stimulation of autophagy and autophagosome activity. In this way variations in 25D levels have the potential to influence both innate and adaptive immune responses. More recent genome-wide analyses have highlighted how cytokine signaling pathways can influence the intracrine vitamin D system and either enhance or abrogate responses to 25D. The current review will discuss the impact of intracrine vitamin D metabolism on both innate and adaptive immunity, whilst introducing the concept of disease-specific corruption of vitamin D metabolism and how this may alter the requirements for vitamin D in maintaining a healthy immune system in humans.
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Affiliation(s)
- Rene F. Chun
- Department of Orthopaedic Surgery, Orthopedic Hospital Research Center, David Geffen School of Medicine, University of California at Los AngelesLos Angeles, CA, USA
| | - Philip T. Liu
- Department of Orthopaedic Surgery, Orthopedic Hospital Research Center, David Geffen School of Medicine, University of California at Los AngelesLos Angeles, CA, USA
| | - Robert L. Modlin
- Division of Dermatology, Department of Medicine, David Geffen School of Medicine, University of California at Los AngelesLos Angeles, CA, USA
| | - John S. Adams
- Department of Orthopaedic Surgery, Orthopedic Hospital Research Center, David Geffen School of Medicine, University of California at Los AngelesLos Angeles, CA, USA
| | - Martin Hewison
- Department of Orthopaedic Surgery, Orthopedic Hospital Research Center, David Geffen School of Medicine, University of California at Los AngelesLos Angeles, CA, USA
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Mann EH, Chambers ES, Pfeffer PE, Hawrylowicz CM. Immunoregulatory mechanisms of vitamin D relevant to respiratory health and asthma. Ann N Y Acad Sci 2014; 1317:57-69. [PMID: 24738964 DOI: 10.1111/nyas.12410] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Vitamin D deficiency is prevalent among people with various immune-mediated conditions, including autoimmune diseases and asthma. Serum 25(OH)D levels inversely correlate with asthma severity, glucocorticoid responsiveness/dosage, and markers of pathogenesis, such as airway remodeling, IgE, and eosinophilia. Trials involving supplementation with active vitamin D or a precursor are beginning to emerge with variable results that, in part, reflect differences in study design. This review looks at the mechanisms by which vitamin D may protect against asthma, including increasing glucocorticoid responsiveness, skewing immune cells towards a regulatory phenotype, reducing the incidence of infections, airway remodeling, eosinophilia, and lowering the levels of IgE. Also discussed is the therapeutic potential for vitamin D, which is likely to be applicable to immune-mediated conditions beyond simply asthma.
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Affiliation(s)
- Elizabeth H Mann
- Medical Research Council (MRC) and Asthma U.K. Center for Allergic Mechanisms of Asthma, King's College London, London, United Kingdom
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Kundu R, Chain BM, Coussens AK, Khoo B, Noursadeghi M. Regulation of CYP27B1 and CYP24A1 hydroxylases limits cell-autonomous activation of vitamin D in dendritic cells. Eur J Immunol 2014; 44:1781-90. [DOI: 10.1002/eji.201344157] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 12/23/2013] [Accepted: 02/10/2014] [Indexed: 12/20/2022]
Affiliation(s)
- Rhiannon Kundu
- Division of Infection and Immunity; University College London; London UK
| | - Benjamin M. Chain
- Division of Infection and Immunity; University College London; London UK
| | - Anna K. Coussens
- Clinical Infectious Diseases Research Initiative; University of Cape Town; Cape Town South Africa
| | - Bernard Khoo
- Department of Endocrinology; University College London; London UK
| | - Mahdad Noursadeghi
- Division of Infection and Immunity; University College London; London UK
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Robinson C, Woo S, Nowak AK, Lake RA. Dietary vitamin D supplementation does not reduce the incidence or severity of asbestos-induced mesothelioma in a mouse model. Nutr Cancer 2014; 66:383-7. [PMID: 24564337 DOI: 10.1080/01635581.2013.878733] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Epidemiological studies suggest that vitamin and mineral intake is associated with cancer incidence. A prevention strategy based on diet or dietary supplementation could have enormous benefit, both directly, by preventing disease, and indirectly by alleviating fear in millions of people worldwide who have been exposed to asbestos. We have previously shown that dietary supplementation with the antioxidants vitamins A, E, and selenium does not affect overall survival nor the time to progression of asbestos-induced mesothelioma in MexTAg mice. Here we have extended our analysis to vitamin D. We compared survival of asbestos-exposed MexTAg mice provided with diets that were deficient or supplemented with 4500 IU/kg vitamin D (cholecalciferol). Survival of supplemented mice was significantly shorter than mice given a standard AIN93 diet containing 1000 IU/kg cholecalciferol (median survival was 29 and 32.5 weeks respectively). However, mice deficient in vitamin D had the same rate of mesothelioma development as control mice. Neither the latency time from asbestos exposure to diagnosis nor disease progression after diagnosis were significantly different between mice on these diets. We conclude that vitamin D is unlikely to moderate the incidence of disease in asbestos-exposed populations or to ameliorate the pathology in patients with established mesothelioma.
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Affiliation(s)
- Cleo Robinson
- a National Centre for Asbestos Related Diseases , University of Western Australia , QEII Medical Centre, Nedlands , Perth , Australia
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Mandell E, Seedorf G, Gien J, Abman SH. Vitamin D treatment improves survival and infant lung structure after intra-amniotic endotoxin exposure in rats: potential role for the prevention of bronchopulmonary dysplasia. Am J Physiol Lung Cell Mol Physiol 2014; 306:L420-8. [PMID: 24414254 DOI: 10.1152/ajplung.00344.2013] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Vitamin D (vit D) has anti-inflammatory properties and modulates lung growth, but whether vit D can prevent lung injury after exposure to antenatal inflammation is unknown. We hypothesized that early and sustained vit D treatment could improve survival and preserve lung growth in an experimental model of bronchopulmonary dysplasia induced by antenatal exposure to endotoxin (ETX). Fetal rats (E20) were exposed to ETX (10 μg), ETX + Vit D (1 ng/ml), or saline (control) via intra-amniotic (IA) injections and delivered 2 days later. Newborn pups exposed to IA ETX received daily intraperitoneal injections of vit D (1 ng/g) or saline for 14 days. Vit D treatment improved oxygen saturations (78 vs. 87%; P < 0.001) and postnatal survival (84% vs. 57%; P < 0.001) after exposure to IA ETX compared with IA ETX alone. Postnatal vit D treatment improved alveolar and vascular growth at 14 days by 45% and 25%, respectively (P < 0.05). Vit D increased fetal sheep pulmonary artery endothelial cell (PAEC) growth and tube formation by 64% and 44%, respectively (P < 0.001), and prevented ETX-induced reductions of PAEC growth and tube formation. Vit D directly increased fetal alveolar type II cell (ATIIC) growth by 26% (P < 0.001) and enhanced ATIIC growth in the presence of ETX-induced growth suppression by 73% (P < 0.001). We conclude that antenatal vit D therapy improved oxygenation and survival in newborn rat pups and enhanced late lung structure after exposure to IA ETX in vivo, which may partly be due to direct effects on vascular and alveolar growth.
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Affiliation(s)
- Erica Mandell
- Dept. of Pediatrics, The Children's Hospital, B395, 13123 East 16th Ave., Aurora, CO 80045.
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Federico G, Focosi D, Marchi B, Randazzo E, De Donno M, Vierucci F, Bugliani M, Campi F, Scatena F, Saggese G, Mathieu C, Marchetti P. Administering 25-hydroxyvitamin D3 in vitamin D-deficient young type 1A diabetic patients reduces reactivity against islet autoantigens. Clin Nutr 2014; 33:1153-6. [PMID: 24461876 DOI: 10.1016/j.clnu.2014.01.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2013] [Revised: 09/16/2013] [Accepted: 01/02/2014] [Indexed: 01/06/2023]
Abstract
BACKGROUND & AIMS We investigated whether improving 25-hydroxyvitamin D status in young type 1A diabetic patients reduces reactivity of peripheral blood mononuclear cells against islet autoantigens and associates with beta-cell functional changes. METHODS Eight patients with 25-hydroxyvitamin D deficiency (<20 ng/ml), out of 15 consecutive young type 1A diabetic subjects received 25-hydroxyvitamin D3 to achieve and maintain levels above 50 ng/ml for up to one year. Peripheral blood mononuclear cell reactivity (Interferon-γ spots) against beta-cell autoantigens (glutamic acid decarboxylase 65-kD isoform, proinsulin and tyrosine phosphatase-like protein IA-2) and C-peptide during mixed meal were assessed before and after 25-hydroxyvitamin D3 replenishment. RESULTS Target 25-hydroxyvitamin D blood levels were safely reached and maintained. Peripheral blood mononuclear cell reactivity against glutamic acid decarboxylase 65-kD isoform (3.8 ± 4.0 vs. 45 ± 16) and proinsulin (3.5 ± 3.2 vs. 75 ± 51) decreased significantly (p < 0.001 and p < 0.02) upon 25-hydroxyvitamin D3 replenishment, which was correlated with 25-hydroxyvitamin D concentrations. C-peptide values remained stable after one year of treatment. CONCLUSIONS Safely restored and maintained 25-hydroxyvitamin D levels associated with reduced peripheral blood mononuclear cell reactivity against beta-cell autoantigens with no significant decrease of beta-cell function in this cohort of patients.
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Affiliation(s)
- G Federico
- Sezione di Diabetologia Pediatrica, U.O. Pediatria Universitaria, Dipartimento Materno Infantile, Azienda Ospedaliero-Universitaria Pisana, Italy.
| | - D Focosi
- U.O. Medicina Trasfusionale e Biologia dei Trapianti, Dipartimento di Oncologia, dei Trapianti e delle Nuove Tecnologie, Azienda Ospedaliero-Universitaria Pisana, Italy
| | - B Marchi
- Sezione di Diabetologia Pediatrica, U.O. Pediatria Universitaria, Dipartimento Materno Infantile, Azienda Ospedaliero-Universitaria Pisana, Italy
| | - E Randazzo
- Sezione di Diabetologia Pediatrica, U.O. Pediatria Universitaria, Dipartimento Materno Infantile, Azienda Ospedaliero-Universitaria Pisana, Italy
| | - M De Donno
- U.O. Medicina Trasfusionale e Biologia dei Trapianti, Dipartimento di Oncologia, dei Trapianti e delle Nuove Tecnologie, Azienda Ospedaliero-Universitaria Pisana, Italy
| | - F Vierucci
- Sezione di Diabetologia Pediatrica, U.O. Pediatria Universitaria, Dipartimento Materno Infantile, Azienda Ospedaliero-Universitaria Pisana, Italy
| | - M Bugliani
- Sezione di Endocrinologia e Metabolismo dei Trapianti d'Organo e Cellulari, Dipartimento di Oncologia, dei Trapianti e delle Nuove tecnologie, Azienda Ospedaliero-Universitaria Pisana, Italy
| | - F Campi
- U.O. Malattie Metaboliche e Endocrinologia, Dipartimento di Area Medica, Azienda Ospedaliero-Universitaria Pisana, Pisa, Italy
| | - F Scatena
- U.O. Medicina Trasfusionale e Biologia dei Trapianti, Dipartimento di Oncologia, dei Trapianti e delle Nuove Tecnologie, Azienda Ospedaliero-Universitaria Pisana, Italy
| | - G Saggese
- Sezione di Diabetologia Pediatrica, U.O. Pediatria Universitaria, Dipartimento Materno Infantile, Azienda Ospedaliero-Universitaria Pisana, Italy
| | - C Mathieu
- Clinical and Experimental Endocrinology, Katholieke Universiteit Leuven, Leuven, Belgium
| | - P Marchetti
- Sezione di Endocrinologia e Metabolismo dei Trapianti d'Organo e Cellulari, Dipartimento di Oncologia, dei Trapianti e delle Nuove tecnologie, Azienda Ospedaliero-Universitaria Pisana, Italy
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Johnsen MS, Grimnes G, Figenschau Y, Torjesen PA, Almås B, Jorde R. Serum free and bio-available 25-hydroxyvitamin D correlate better with bone density than serum total 25-hydroxyvitamin D. Scand J Clin Lab Invest 2014; 74:177-83. [PMID: 24383929 DOI: 10.3109/00365513.2013.869701] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
In the circulation 25-hydroxyvitamin D (25(OH)D) is bound to vitamin D-binding protein (DBP) and albumin. Only a small fraction is in the unbound, free form. According to the 'free-hormone-hypothesis' only the free form is biologically active. Genetic differences in DBP may affect the binding to 25(OH)D and thereby the amount of free 25(OH)D. In the present study sera were obtained from 265 postmenopausal women with low bone mass density (BMD). Serum 25(OH)D, DBP and albumin were measured and the free and bio-available (free + albumin-bound) 25(OH)D calculated. Based on genotyping of the polymorphisms rs7041 and rs4588, the six common DBP phenotypes were identified and the free and bio-available 25(OH)D calculated according to the corresponding binding coefficients. Relations between measures of 25(OH)D and PTH and BMD were evaluated with linear regression adjusted for age and BMI. The calculated amount of free and bio-available 25(OH)D was 0.03% and 13.1%, respectively, of the measured total serum 25(OH)D. Adjusting for DBP phenotype affected the calculated free and bio-available 25(OH)D levels up to 37.5%. All measures of 25(OH)D correlated significantly with PTH, whereas a significant association with BMD was only seen for the free and bio-available 25(OH)D measures. Adjusting for the DBP phenotypes improved the associations. These relations were almost exclusively seen in subjects not using vitamin D and/or calcium supplements. In conclusion, the free and bio-available forms of 25(OH)D may be a more informative measure of vitamin D status than total 25(OH)D. Adjustment for DBP phenotype may improve this further.
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Affiliation(s)
- Martin S Johnsen
- Tromsø Endocrine Research Group, Department of Clinical Medicine, University of Tromsø , Tromsø
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141
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Carbone F, Montecucco F. The role of the intraplaque vitamin d system in atherogenesis. SCIENTIFICA 2013; 2013:620504. [PMID: 24459602 PMCID: PMC3888771 DOI: 10.1155/2013/620504] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Accepted: 12/10/2013] [Indexed: 06/03/2023]
Abstract
Vitamin D has been shown to play critical activities in several physiological pathways not involving the calcium/phosphorus homeostasis. The ubiquitous distribution of the vitamin D receptor that is expressed in a variety of human and mouse tissues has strongly supported research on these "nonclassical" activities of vitamin D. On the other hand, the recent discovery of the expression also for vitamin D-related enzymes (such as 25-hydroxyvitamin D-1 α -hydroxylase and the catabolic enzyme 1,25-dihydroxyvitamin D-24-hydroxylase) in several tissues suggested that the vitamin D system is more complex than previously shown and it may act within tissues through autocrine and paracrine pathways. This updated model of vitamin D axis within peripheral tissues has been particularly investigated in atherosclerotic pathophysiology. This review aims at updating the role of the local vitamin D within atherosclerotic plaques, providing an overview of both intracellular mechanisms and cell-to-cell interactions. In addition, clinical findings about the potential causal relationship between vitamin D deficiency and atherogenesis will be analysed and discussed.
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Affiliation(s)
- Federico Carbone
- Department of Internal Medicine, University of Genoa School of Medicine, IRCCS Azienda Ospedaliera Universitaria San Martino-IST Istituto Nazionale per la Ricerca sul Cancro, 6 Viale Benedetto XV, 16132 Genoa, Italy
- Cardiology Division, Foundation for Medical Researches, Department of Internal Medicine, University of Geneva, 64, Avenue de la Roseraie, 1211 Geneva, Switzerland
| | - Fabrizio Montecucco
- Department of Internal Medicine, University of Genoa School of Medicine, IRCCS Azienda Ospedaliera Universitaria San Martino-IST Istituto Nazionale per la Ricerca sul Cancro, 6 Viale Benedetto XV, 16132 Genoa, Italy
- Division of Laboratory Medicine, Department of Genetics and Laboratory Medicine, Geneva University Hospitals, 4 rue Gabrielle-Perret-Gentil, 1205 Geneva, Switzerland
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142
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Van Belle TL, Gysemans C, Mathieu C. Vitamin D and diabetes: the odd couple. Trends Endocrinol Metab 2013; 24:561-8. [PMID: 23972673 DOI: 10.1016/j.tem.2013.07.002] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2013] [Revised: 07/12/2013] [Accepted: 07/15/2013] [Indexed: 12/30/2022]
Abstract
The beneficial effects of vitamin D supplementation for several health-related issues, including the prevention of diabetes, are a topic of intense discussion. Data from epidemiological studies suggest a correlation between vitamin D deficiency and higher prevalence of both type 1 and type 2 diabetes (T1D and T2D). In animal models, vitamin D deficiency predisposes to diabetes whereas vitamin D supplementation prevents disease. Nevertheless, well-designed clinical intervention studies are lacking. We discuss here the evidence for a role of vitamin D in diabetes and propose that vitamin D deficiency should be avoided, especially in all at-risk people. This should be possible by implementing global guidelines and by focusing on daily dietary supplementation with small doses of vitamin D.
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Affiliation(s)
- Tom L Van Belle
- Clinical and Experimental Endocrinology, Katholieke Universiteit (KU) Leuven, Campus Gasthuisberg, O&N 1 Herestraat 49, Box 902, 3000 Leuven, Belgium
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143
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Abstract
PURPOSE OF REVIEW This update on childhood idiopathic inflammatory myopathies (IIMs) reviews recent progress in the field of translational science and clinical research over the past 12-18 months. RECENT FINDINGS Several new studies, including results from the international genome-wide association study, point to abnormalities of the adaptive immune system in childhood IIMs. Circulating T-follicular helper cells promote plasma cell differentiation and have been found in high levels in juvenile dermatomyositis (JDM), which may account the frequency of autoantibodies seen in this disease. One of the latest to be identified in JDM targets the protein NXP-2 and is associated with an increased risk of calcinosis in young patients. The first randomized controlled clinical trial in refractory adult and childhood IIMs was reported this year. B-cell depletion with the anti-CD20 antibody, rituximab, failed to achieve its primary end point, but patients with JDM did show good improvement in disease activity. A new international definition of disease remission in JDM has been agreed, which will aid disease assessment in future therapeutic trials. SUMMARY The challenges of studying a rare disease such as JDM have been overcome by several collaborative studies and have led to significant progress in understanding the cause, treatment and prognosis of childhood IIMs.
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Affiliation(s)
| | - Lucy R. Wedderburn
- Rheumatology Unit, UCL Institute for Child Health, London
- Arthritis Research UK Centre for Adolescent Rheumatology at UCL, UCLH and GOSH, UK
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144
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Bulman A, Neagu M, Constantin C. Immunomics in Skin Cancer - Improvement in Diagnosis, Prognosis and Therapy Monitoring. CURR PROTEOMICS 2013; 10:202-217. [PMID: 24228023 PMCID: PMC3821382 DOI: 10.2174/1570164611310030003] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Revised: 06/10/2013] [Accepted: 06/11/2013] [Indexed: 11/30/2022]
Abstract
This review will focus on the elements of the skin’s immune system, immune cells and/or non-immune cells that support immune mechanisms, molecules with immune origin and/or immune functions that are involved in skin
carcinogenesis. All these immune elements are compulsory in the development of skin tumors and/or sustainability of the neoplastic process. In this light, recent data gathered in this review will acknowledge all immune elements that contribute to skin tumorigenesis; moreover, they can serve as immune biomarkers. These immune markers can contribute to the
diagnostic improvement, prognosis forecast, therapy monitoring, and even personalized therapeutical approach in skin cancer. Immune processes that sustain tumorigenesis in non-melanoma and melanoma skin cancers are described in the framework of recent data.
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145
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Vitamin D and chronic obstructive pulmonary disease: hype or reality? THE LANCET RESPIRATORY MEDICINE 2013; 1:804-12. [PMID: 24461760 DOI: 10.1016/s2213-2600(13)70102-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Abundant laboratory findings show the important role vitamin D has in the innate and adaptive immune system. In human beings, observational studies have associated vitamin D deficiency with an increased risk for different inflammatory, infectious, and autoimmune diseases. With regard to chronic obstructive pulmonary disease (COPD), conflicting data have been reported. Most epidemiological studies have been restricted by their design, and larger longitudinal studies of population-based samples and of cohorts with COPD are warranted. An alternative explanation for the discordant results in COPD might be related to the complexity of the intracellular vitamin D signalling pathway, which is not shown in systemic levels of the precursor 25-hydroxyvitamin D. For COPD in particular, we speculate that local downregulation of vitamin D signalling from and beyond the receptor might clarify why pro-inflammatory processes in the airways are not or are insufficiently countered by vitamin D-dependent control mechanisms. In a disease already characterised by glucocorticoid resistance, the potential activation and reactivation of an intrinsic comprehensive system of immune control should attract more attention to design appropriate interventions with promising therapeutic potential.
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146
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Kongsbak M, Levring TB, Geisler C, von Essen MR. The vitamin d receptor and T cell function. Front Immunol 2013; 4:148. [PMID: 23785369 PMCID: PMC3684798 DOI: 10.3389/fimmu.2013.00148] [Citation(s) in RCA: 194] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Accepted: 05/29/2013] [Indexed: 12/14/2022] Open
Abstract
The vitamin D receptor (VDR) is a nuclear, ligand-dependent transcription factor that in complex with hormonally active vitamin D, 1,25(OH)2D3, regulates the expression of more than 900 genes involved in a wide array of physiological functions. The impact of 1,25(OH)2D3-VDR signaling on immune function has been the focus of many recent studies as a link between 1,25(OH)2D3 and susceptibility to various infections and to development of a variety of inflammatory diseases has been suggested. It is also becoming increasingly clear that microbes slow down immune reactivity by dysregulating the VDR ultimately to increase their chance of survival. Immune modulatory therapies that enhance VDR expression and activity are therefore considered in the clinic today to a greater extent. As T cells are of great importance for both protective immunity and development of inflammatory diseases a variety of studies have been engaged investigating the impact of VDR expression in T cells and found that VDR expression and activity plays an important role in both T cell development, differentiation and effector function. In this review we will analyze current knowledge of VDR regulation and function in T cells and discuss its importance for immune activity.
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Affiliation(s)
- Martin Kongsbak
- Department of International Health, Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen , Copenhagen , Denmark
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147
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Klug-Micu GM, Stenger S, Sommer A, Liu PT, Krutzik SR, Modlin RL, Fabri M. CD40 ligand and interferon-γ induce an antimicrobial response against Mycobacterium tuberculosis in human monocytes. Immunology 2013; 139:121-8. [PMID: 23289765 DOI: 10.1111/imm.12062] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2012] [Revised: 12/11/2012] [Accepted: 01/02/2013] [Indexed: 01/25/2023] Open
Abstract
The ability of T cells to activate antimicrobial pathways in infected macrophages is essential to host defence against many intracellular pathogens. Here, we compared the ability of two T-cell-mediated mechanisms to trigger antimicrobial responses against Mycobacterium tuberculosis in humans, CD40 activation and the release of interferon-γ (IFN-γ). Given that IFN-γ activates a vitamin D-dependent antimicrobial response, we focused on induction of the key components of this pathway. We show that activation of human monocytes via CD40 ligand (CD40L) and IFN-γ, alone, and in combination, induces the CYP27b1-hydroxylase, responsible for the conversion of 25-hydroxyvitamin D (25D) to the bioactive 1,25-dihydroxyvitamin D (1,25D), and the vitamin D receptor (VDR). The activation of the vitamin D pathway by CD40L and IFN-γ results in up-regulated expression of the antimicrobial peptides, cathelicidin and DEFB4, as well as induction of autophagy. Finally, activation of monocytes via CD40L and IFN-γ results in an antimicrobial activity against intracellular M. tuberculosis. Our data suggest that at least two parallel T-cell-mediated mechanisms, CD40L and IFN-γ, activate the vitamin D-dependent antimicrobial pathway and trigger antimicrobial activity against intracellular M. tuberculosis, thereby contributing to human host defence against intracellular infection.
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148
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Christakos S, Hewison M, Gardner DG, Wagner CL, Sergeev IN, Rutten E, Pittas AG, Boland R, Ferrucci L, Bikle DD. Vitamin D: beyond bone. Ann N Y Acad Sci 2013; 1287:45-58. [PMID: 23682710 PMCID: PMC3717170 DOI: 10.1111/nyas.12129] [Citation(s) in RCA: 197] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
In recent years, vitamin D has been received increased attention due to the resurgence of vitamin D deficiency and rickets in developed countries and the identification of extraskeletal effects of vitamin D, suggesting unexpected benefits of vitamin D in health and disease, beyond bone health. The possibility of extraskeletal effects of vitamin D was first noted with the discovery of the vitamin D receptor (VDR) in tissues and cells that are not involved in maintaining mineral homeostasis and bone health, including skin, placenta, pancreas, breast, prostate and colon cancer cells, and activated T cells. However, the biological significance of the expression of the VDR in different tissues is not fully understood, and the role of vitamin D in extraskeletal health has been a matter of debate. This report summarizes recent research on the roles for vitamin D in cancer, immunity and autoimmune diseases, cardiovascular and respiratory health, pregnancy, obesity, erythropoiesis, diabetes, muscle function, and aging.
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Affiliation(s)
- Sylvia Christakos
- Department of Biochemistry and Molecular Biology, UMDNJ-New Jersey Medical School, Newark, New Jersey, USA
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