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Abstract Title:

Vitamin D supplementation improves cytokine profiles in patients with congestive heart failure: a double-blind, randomized, placebo-controlled trial.

Abstract Source:

Am J Clin Nutr. 2006 Apr;83(4):754-9. PMID: 16600924

Abstract Author(s):

Stefanie S Schleithoff, Armin Zittermann, Gero Tenderich, Heiner K Berthold, Peter Stehle, Reiner Koerfer

Abstract:

BACKGROUND: Elevated circulating concentrations of proinflammatory cytokines may contribute to the pathogenesis of congestive heart failure (CHF). In vitro studies suggest that vitamin D suppresses proinflammatory cytokines and increases antiinflammatory cytokines. OBJECTIVE: We evaluated the effect of vitamin D supplementation on the survival rate and different biochemical variables in patients with CHF. DESIGN: One hundred twenty-three patients randomly received either 50 mug vitamin D(3)/d plus 500 mg Ca/d [D(+) group] or placebo plus 500 mg Ca/d [D(-) group] for 9 mo. Biochemical variables were assessed at baseline and after 9 mo. The survival rate was calculated for a follow-up period of 15 mo. RESULTS: Ninety-three patients completed the study. Significant treatment effects were observed on logarithmic-transformed serum concentrations of 25-hydroxyvitamin D (P = 0.001), parathyroid hormone (P = 0.007), tumor necrosis factor alpha (P = 0.006), and interleukin 10 (P = 0.042). 25-Hydroxyvitamin D increased by 26.8 ng/mL in the D(+) group but increased only by 3.6 ng/mL in the D(-) group. Compared with baseline, parathyroid hormone was significantly lower and the antiinflammatory cytokine interleukin 10 was significantly higher in the D(+) group after 9 mo. The proinflammatory cytokine tumor necrosis factor alpha increased in the D(-) group but remained constant in the D(+) group. The survival rate did not differ significantly between the study groups during the follow-up period. CONCLUSIONS: Vitamin D(3) reduces the inflammatory milieu in CHF patients and might serve as a new antiinflammatory agent for the future treatment of the disease. Our data provide evidence for the involvement of an impaired vitamin D-parathyroid hormone axis in the progression of CHF.

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Sayer Ji
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