Inhibition of Intracellular Survival of Multi Drug Resistant ClinicalIsolates of Mycobacterium tuberculosis in Macrophages by Curcumin

摘要

Curcuma longa commonly known as turmeric has been used in Indian Ayurvedic medicine as a constituent totreat various disorders. It is by now clear that principal curcuminoid of turmeric; curcumin, a yellow pigment, is responsiblefor these beneficiary activities. The aim of the present study was to evaluate anti-mycobacterial effect of curcumin(CMN) on intracellular growth of MDR clinical isolates of Mycobacterium tuberculosis (MTB). Curcumin was evaluatedfor its efficacy to inhibit the intracellular growth of MTB H37Rv and two MDR clinical isolates in Raw 264.7 cell line usingCFU assay. Resazurin microtiter plate assay (REMA) was used to evaluate its direct anti-mycobacterial activity.Curcumin, though did not show direct anti-mycobacterial activity against three MTB strains, exhibited dose dependent inhibition of intracellular growth for MTB H37Rv as well as two MDR clinical isolates. These results suggest that CMNcould be a potential candidate for future, novel adjunctive anti-TB therapy.