Effect of 1,25-Dihydroxy Vitamin D3 on Toll-like Receptor Gene Expression in Neutrophils of Pulmonary Tuberculosis
2014
We studied the effect of 1,25-dihydroxy vitamin D3 [1,25(OH) 2 D, 3 ] on toll-like receptor (TLR) gene expression in neutrophils cultured with Mycobacterium tuberculosis ( Mtb ) with or without 1,25(OH) 2 D 3 in pulmonary tuberculosis patients and healthy controls. 1,25(OH) 2 D 3 significantly increased the expression of TLR2, TLR9 and TIRAP genes compared to control cells in both the study groups (P < 0.05). In healthy controls, a significantly upregulated expression of TIRAP was observed in Mtb infected cells cultured with 1,25(OH) 2 D 3 compared to Mtb infected cells alone ( P < 0.05). In conclusion, 1,25(OH) 2 D 3 upregulated the expression of TLR and TIRAP genes, which could lead to the activation of TLR signalling pathways and augment the innate immunity to tuberculosis.
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