We have previously shown that the novel ATP-dependent chromatin-remodeling complex WINAC is required for the ligand-bound vitamin D receptor (VDR)-mediated transrepression of the 25(OH)D3 1alpha-hydroxylase (1alpha(OH)ase) gene. However, the molecular basis for VDR promoter association, which does not involve its binding to specific DNA sequences, remains unclear. To address this issue, we inve...

OBJECTIVE Adiponectin and its receptors are known to be expressed in osteoblasts and may have important functions in normal bone cells. The aim of this study was to investigate the effect of vitamin D therapy on serum adiponectin levels in children with vitamin D deficiency rickets (VDDR). METHODS 21 patients with VDDR were included in the study. Patients were treated with 300,000 U D3 (IM) a...

Background/Aim: Growing evidence suggests that vitamin D3 exerts anticancer effects. The present study aimed to evaluate 25-hydroxyvitamin (25(OH)D3) as a potential endocrine factor regulating proliferation and D receptor expression in LNCaP prostate cancer cells. Materials Methods: Cell counting after treatment was utilized assess the effect of 25(OH)D3 on cell...

Defensin is a generic name reserved for an endogenously synthesized antimicrobial agent. The purpose of this review is to describe a series of discoveries that led to the proposal that 25-hydroxylated metabolites of vitamin D are key, intracellular regulators of the synthesis and action of naturally occurring defensin molecules against bacterial antigens. The discussion will (1) highlight the b...

T he paper in PNAS by Martineau et al. (1) raises a key public health issue: how much vitamin D do you need to fight tuberculosis (TB)? Martineau et al. (1) found that there is a significant association of vitamin D deficiency with susceptibility to TB and that the impact is greater in HIV-infected than noninfected individuals. In addition, Martineau et al. (1) discover a striking temporal rela...

Anthracyclines such as doxorubicin are highly effective chemotherapy agents used to treat many common malignancies. However, their use is limited by cardiotoxicity. We previously identified visnagin as protecting against doxorubicin toxicity in cardiac but not tumor cells. In this study, we sought to develop more potent visnagin analogs in order to use these analogs as tools to clarify the mech...

BACKGROUND Antiarrhythmic action of flecainide is based on sodium channel blockade. Beta(1)-adrenoceptor (beta(1)AR) activation induces sodium channel inhibition, too. The aim of the present study was to evaluate the impact of different beta(1)AR genotypes on antiarrhythmic action of flecainide in patients with structural heart disease and atrial fibrillation. METHODOLOGY/PRINCIPAL FINDINGS I...