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  • Title: Inhibition of phenolic glycolipid-I synthesis in extracellular Mycobacterium leprae as an indicator of antimicrobial activity.
    Author: Harris EB, Franzblau SG, Hastings RC.
    Journal: Int J Lepr Other Mycobact Dis; 1988 Dec; 56(4):588-91. PubMed ID: 3065422.
    Abstract:
    The effects of 22 antimicrobial agents on the incorporation of [U14C] palmitic acid ([U14C] PA) into the unique phenolic glycolipid-I (PGL-I) antigen of Mycobacterium leprae were studied. Nude-mouse-propagated M. leprae were incubated in a modified Dubos medium in the presence of antimicrobial agents for 4 days. [U14C] PA was then added and incubation was continued for 8 days. The antileprosy agents dapsone, rifampin, and clofazimine (2 micrograms/ml each) caused a significant reduction in [U14C] PA incorporation into PGL-I. Among other agents, the most active were erythromycin, chloramphenicol, and cerulenin. Low concentrations of ethionamide, tetracycline, and minocycline stimulated label incorporation. This system may prove useful in the evaluation of antileprosy agents.
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