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Ozlem Atan Sahin Department of Pediatrics, Acıbadem University School of Medicine, Atasehir, Istanbul, Turkey

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Damla Goksen Department of Pediatric Endocrinology, Faculty of Medicine, Ege University, Bornova, Izmir, Turkey

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Aysel Ozpinar Department of Biochemistry, Acıbadem University, School of Medicine, Atasehir, Istanbul, Turkey

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Muhittin Serdar Department of Biochemistry, Acıbadem University, School of Medicine, Atasehir, Istanbul, Turkey

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Huseyin Onay Department of Medical Genetics, Faculty of Medicine, Ege University, Bornova, Izmir, Turkey

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Introduction Type 1 diabetes (DM1) is a complex disease characterized by the autoimmune destruction of pancreatic β cells. Vitamin D is an immune regulatory hormone that exerts its effects through highly polymorphic VDR that belongs to

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June Young Choi Department of Surgery, Seoul National University Bundang Hospital, Seongnam-si, Korea

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Jin Wook Yi Department of Surgery, Seoul National University Hospital and College of Medicine, Seoul, Korea

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Jun Hyup Lee Department of Surgery, Seoul National University Hospital and College of Medicine, Seoul, Korea

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Ra-Yeong Song Department of Surgery, Seoul National University Hospital and College of Medicine, Seoul, Korea

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Hyeongwon Yu Department of Surgery, Seoul National University Bundang Hospital, Seongnam-si, Korea

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Hyungju Kwon Department of Surgery, Seoul National University Hospital and College of Medicine, Seoul, Korea

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Young Jun Chai Department of Surgery, Seoul National University Boramae Hospital, Seoul, Korea

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Su-jin Kim Department of Surgery, Seoul National University Hospital and College of Medicine, Seoul, Korea

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Kyu Eun Lee Department of Surgery, Seoul National University Hospital and College of Medicine, Seoul, Korea

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epidemiological reports show that higher levels of vitamin D3 are associated with a lower risk of developing cancer ( 3 ). The active form of vitamin D3, 1,25-dihydroxyvitamin D3 (1,25D) exerts antitumor activity by binding to the vitamin D receptor ( VDR ). The

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Lijuan Fu Department of Laboratory, Changyi People’s Hospital of Shandong Province, Changyi, Shandong, China

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Jinhuan Ma Department of Laboratory, Changyi Maternal and Child Health Hospital of Shandong Province, Changyi, Shandong, China

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Sumei Yan Department of Obstetrics, Changyi Maternal and Child Health Hospital of Shandong Province, Changyi, Shandong, China

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Qijun Si Department of Laboratory, Zhuji Affiliated Hospital of Shaoxing University, Zhuji, Zhejiang, China

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an important contributing factor to the development of postmenopausal osteoporosis ( 6 , 7 ). Considering that the action of vitamin D, one of the most crucial modulating factor of bone metabolism, is mediated by the vitamin D receptor (VDR), it is

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Melissa Braga Department of Internal Medicine, Charles R. Drew University of Medicine and Science, Los Angeles, California, USA

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Zena Simmons Department of Health & Life Sciences, Charles R. Drew University of Medicine and Science, Los Angeles, California, USA

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Keith C Norris Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California, USA

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Monica G Ferrini Department of Internal Medicine, Charles R. Drew University of Medicine and Science, Los Angeles, California, USA
Department of Health & Life Sciences, Charles R. Drew University of Medicine and Science, Los Angeles, California, USA
Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California, USA

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Jorge N Artaza Department of Internal Medicine, Charles R. Drew University of Medicine and Science, Los Angeles, California, USA
Department of Health & Life Sciences, Charles R. Drew University of Medicine and Science, Los Angeles, California, USA
Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California, USA

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level there is also evidence of VDR expression and direct effects of vitamin D on human skeletal muscle precursor cells ( 7 ), which provides a rationale for a direct role of vitamin D in muscle function. Furthermore, mice lacking VDR show an abnormal

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Amarjit Saini Division of Clinical Physiology, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
Unit of Clinical Physiology, Karolinska University Hospital, Stockholm, Sweden

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Linda Björkhem-Bergman Division of Clinical Geriatrics, Departments of Neurobiology, Care Sciences and Neurobiology, Karolinska Institutet, Stockholm, Sweden

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Johan Boström Division of Clinical Physiology, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
Unit of Clinical Physiology, Karolinska University Hospital, Stockholm, Sweden

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Mats Lilja Division of Clinical Physiology, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
Unit of Clinical Physiology, Karolinska University Hospital, Stockholm, Sweden

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Michael Melin Division of Clinical Physiology, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
Unit of Clinical Physiology, Karolinska University Hospital, Stockholm, Sweden
Unit of Cardiology, Karolinska University Hospital, Stockholm, Sweden

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Karl Olsson Division of Clinical Physiology, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
Unit of Clinical Physiology, Karolinska University Hospital, Stockholm, Sweden

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Lena Ekström Division of Clinical Pharmacology, Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden

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Peter Bergman Division of Clinical Microbiology, Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden

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Mikael Altun Division of Clinical Physiology, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
Unit of Clinical Physiology, Karolinska University Hospital, Stockholm, Sweden

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Eric Rullman Division of Clinical Physiology, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
Unit of Clinical Physiology, Karolinska University Hospital, Stockholm, Sweden
Unit of Cardiology, Karolinska University Hospital, Stockholm, Sweden

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Thomas Gustafsson Division of Clinical Physiology, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
Unit of Clinical Physiology, Karolinska University Hospital, Stockholm, Sweden

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receptor (VDR). A heterodimer, formed with retinoid X receptor (RXR), then binds specific genomic sequences (vitamin D response elements or VDREs) acting to influence gene transcription ( 13 ). VDREs have been found in several hundred genes that are

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Bingbing Wang Division of Maternal-Fetal Medicine, Department of Obstetrics, Gynecology and Reproductive Sciences, Rutgers Robert Wood Johnson Medical School, New Brunswick, New Jersey, USA

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Mayra Cruz Ithier Division of Maternal-Fetal Medicine, Department of Obstetrics, Gynecology and Reproductive Sciences, Rutgers Robert Wood Johnson Medical School, New Brunswick, New Jersey, USA

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Nataliya Parobchak Division of Maternal-Fetal Medicine, Department of Obstetrics, Gynecology and Reproductive Sciences, Rutgers Robert Wood Johnson Medical School, New Brunswick, New Jersey, USA

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Stacy M Yadava Division of Maternal-Fetal Medicine, Department of Obstetrics, Gynecology and Reproductive Sciences, Rutgers Robert Wood Johnson Medical School, New Brunswick, New Jersey, USA

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Jay Schulkin Department of Obstetrics, Gynecology, University of Washington, Seattle, Washington, USA

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Todd Rosen Division of Maternal-Fetal Medicine, Department of Obstetrics, Gynecology and Reproductive Sciences, Rutgers Robert Wood Johnson Medical School, New Brunswick, New Jersey, USA

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occurs via two pathways: non-genomic and genomic responses, both of which involve binding of 1,25-dihydroxyvitamin D (1,25(OH)2D), the active metabolite of vitamin D and the vitamin D receptor (VDR), a member of the superfamily of nuclear receptor for

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Jane Fletcher Nutrition Nurses, University Hospitals Birmingham NHS Trust, Queen Elizabeth Hospital Birmingham, Mindelsohn Way, Edgbaston, Birmingham, UK
School of Nursing, Institute of Clinical Sciences, University of Birmingham, Edgbaston, Birmingham, UK

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Emma L Bishop Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, UK

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Stephanie R Harrison Leeds Institute of Rheumatic and Musculoskeletal Medicine, Chapel Allerton Hospital, Leeds, UK

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Amelia Swift School of Nursing, Institute of Clinical Sciences, University of Birmingham, Edgbaston, Birmingham, UK

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Sheldon C Cooper Gastroenterology Department, University Hospitals Birmingham NHS Trust, Queen Elizabeth Hospital Birmingham, Mindelsohn Way, Edgbaston, Birmingham, UK

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Sarah K Dimeloe Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, UK

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Karim Raza Institute of Inflammation and Ageing, University of Birmingham, Birmingham, UK

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Martin Hewison Institute of Metabolism and Systems Research, University of Birmingham, Birmingham, UK

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-hydroxylase), with this activity occurring primarily in the proximal tubules of the kidney under positive and negative control by parathyroid hormone (PTH) and fibroblast growth factor 23 (FGF23) respectively. Binding to its cognate nuclear vitamin D receptor (VDR

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Alexander V Amram Department of Physiology, Cardiovascular Research Institute, University of California, San Francisco, San Francisco, California, USA
Eli and Edythe Broad Center for Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, California, USA

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Stephen Cutie Department of Physiology, Cardiovascular Research Institute, University of California, San Francisco, San Francisco, California, USA
Eli and Edythe Broad Center for Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, California, USA

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Guo N Huang Department of Physiology, Cardiovascular Research Institute, University of California, San Francisco, San Francisco, California, USA
Eli and Edythe Broad Center for Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, California, USA

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’s cognate receptor is vitamin D receptor (VDR) a ligand-dependent member of the nuclear receptor superfamily ( 35 , 38 ). Upon binding of vitamin D, VDR regulates transcription and cellular pathways by binding to vitamin D response elements located in the

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Mohammed S Razzaque Department of Pathology, Lake Erie College of Osteopathic Medicine, Erie, Pennsylvania, USA

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renal expression of 24-hydroxylase ( 2 ). The bioactive 1,25(OH) 2 D 3 interacts with the high-affinity vitamin D receptor (VDR) to exert its functions ( 3 ). VDR forms a heterodimer with the retinoid receptor to induce the transcription of vitamin D

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Glenville Jones Department of Biomedical and Molecular Sciences, Queen’s University, Kingston, Ontario, Canada

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witnessed the exciting realization that vitamin D has its own set of dedicated specialized machinery consisting of transport proteins, metabolic enzymes and vitamin D receptor (VDR) to mediate the actions of vitamin D, not only in bone but also in many other

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