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  • Title: Vitamin D analogs: novel therapeutic agents for cardiovascular disease?
    Author: Reinhart GA.
    Journal: Curr Opin Investig Drugs; 2004 Sep; 5(9):947-51. PubMed ID: 15503649.
    Abstract:
    Vitamin D3 plays a key role in regulating calcium and mineral homeostasis in support of normal development and maintenance of bone. The classic effects of vitamin D3 include promoting absorption of dietary calcium in the gut and, through its actions as a steroid endocrine hormone, regulating the synthesis and secretion of parathyroid hormone. The effects of the vitamin D3 system are mediated through the highly regulated generation of the potent, active metabolite 1,25-dihydroxyvitamin D3 (calcitriol). Vitamin D3 exerts its effects through the vitamin D3 receptor (VDR), a ligand-activated nuclear receptor expressed in a wide array of tissue and cell types. Studies performed in mice rendered deficient for VDR suggest that calcitriol and VDR may inhibit the renin-angiotensin system and reduce blood pressure in the long-term. Clinical studies suggest that administration of vitamin D3 analogs produces differential benefit with regards to mortality in dialysis patients; other studies suggest that vitamin D3 analogs may provide cardiovascular benefit in both dialysis and nondialysis patients. This paper reviews clinical and preclinical studies, which suggest that vitamin D3 analogs may provide therapeutic utility in the treatment of cardiovascular disease independent of those mechanisms typically associated with the vitamin D3 endocrine system.
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