The Role of Vitamin D in Atherosclerosis Inflammation Revisited: More a Bystander than a Player?

The Role of Vitamin D in Atherosclerosis Inflammation Revisited: More a Bystander than a Player? Curr Vasc Pharmacol. 2013 Dec 9; Authors: Mangge H, Weghuber D, Prassl R, Haara A, Schnedl W, Postolache TT, Fuchs D Abstract Levels of 25-hydroxy vitamin D [25(OH)D] are reported to be decreased in cardiovascular disease (CVD) and in other chronic immunopathologies. Vitamin D (vitD) has been shown to be significantly linked to mortality, and is thought to be a predictor of survival. Therefore, supplementation with vitD has been suggested as an option to improve clinical outcomes. In contrast to the causal assumption, we hypothesize that the decreased vitD levels, seen in patients with CVD and chronic immunopathologies is secondary to inflammation and not as pathophysiologically relevant as currently suggested. Under these conditions, low vitD might be mainly caused by oxidative stress that results from chronic, immune-mediated vascular and systemic inflammation seen in patients with CVD. The oxidative environment most likely causes biodegradation of vitD and interferes with key enzymes, disturbing the biosynthesis of 25(OH)D and 1,25(OH)D. Thus far, no clear evidence of a beneficial effect of vitD supplements exists, beyond treating vitD deficiency to improve skeletal health. Moreover, a prolonged and/or high dose vitD supplementation, unless needed to correct actual vitD deficiency [levels of 25(OH)D<20 ng/ml)] may even be immunologically harm...
Source: Current Vascular Pharmacology - Category: Drugs & Pharmacology Authors: Tags: Curr Vasc Pharmacol Source Type: research