Evaluation of the Relation between Vitamin D and Serum Omentin and Vaspin Levels in Women

Introduction: Vitamin D deficiency is a common health problem seen worldwide. Adipokines released from adipose tissue play important roles in the control of appetite and satiety, modulation of body fat distribution, regulation of insulin sensitivity and secretion, control of blood pressure, and regulation of endothelial functions and inflammation. The aim of the present study is to investigate how vitamin D levels affect serum vaspin and omentin levels. Materials and methods: This is a cross-sectional study design. A total of 77 female volunteers were included in the study, and they were divided into 3 groups according to vitamin D levels. Relation of vitamin D with serum vaspin and omentin levels was determined in these groups. Results: Serum omentin, vaspin and parathyroid hormone (PTH) levels differed significantly between the groups (p < 0.001, p < 0.001, p = 0.001, respectively). Omentin levels correlated significantly and negatively with the vitamin D and vaspin levels, but there was a significant positive correlation between omentin and PTH (r = -0.626, p < 0.001; r = -0.867, p < 0.001; r = 0.461, P < 0.001, respectively). A significant positive correlation was detected between vaspin levels and vitamin D, whereas omentin and PTH levels correlated negatively and significantly (r = 0.374, p < 0.001; r = -0.867, p < 0.001; r = -0.374, p = 0.002, respectively). Conclusions: Vitamin D may affect the release of adipokines from the adipose tissue, and this effect may be in a negative or positive manner. This effect of vitamin D may probably be mediated via vitamin D receptors exhibited in the adipose tissue, or via mechanisms not identified yet. The results of this study suggested that there was a significant, positive correlation between serum vitamin D levels and vaspin, whereas a significant, negative correlation between vitamin D levels and omentin. Further studies on larger series are needed in order to confirm these results.