Abstract：
:The role of vitamin D in obesity appears to be linked to vitamin D insufficient/deficient status. However, mechanistic understanding of the role of vitamin D in obesity is lacking. We have shown earlier that the vitamin D hormonal form, 1,25-dihydroxyvitamin D3 (1,25(OH)2D3), induces cell death by apoptosis in mature adipocytes. This effect of the hormone is mediated by the cellular Ca2+ signaling pathway: a sustained increase of intracellular (cytosolic) Ca2+ concentration followed by activation of Ca2+-dependent initiators and effectors of apoptosis. In recent animal studies, we demonstrated that low vitamin D status is observed in diet-induced obesity (DIO). High intake of vitamin D3 in DIO decreased the weight of white adipose tissue and improved biomarkers related to adiposity and Ca2+ regulation. The anti-obesity effect of vitamin D (1,25(OH)2D3) in DIO was determined by the induction of Ca2+-mediated apoptosis in mature adipocytes executed by Ca2+-dependent apoptotic proteases (calpains and caspases). Thus, a high intake of vitamin D in obesity increases vitamin D nutritional status and normalizes vitamin D hormonal status that is accompanied by the reduction of adiposity. Overall, our findings imply that vitamin D may contribute to the prevention of obesity and obesity-related diseases and that the mechanism of the anti-obesity effect of 1,25(OH)2D3 includes induction of Ca2+-mediated apoptosis in adipocytes.
journal_name
Nutrientsjournal_title
Nutrientsauthors
Sergeev INdoi
10.3390/nu12051392subject
Has Abstractpub_date
2020-05-13 00:00:00issue
5issn
2072-6643pii
nu12051392journal_volume
12pub_type
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