Synergic activity of D-cycloserine and beta-chloro-D-alanine against Mycobacterium tuberculosis
Author(s) -
Susana David
Publication year - 2001
Publication title -
journal of antimicrobial chemotherapy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.124
H-Index - 194
eISSN - 1460-2091
pISSN - 0305-7453
DOI - 10.1093/jac/47.2.203
Subject(s) - peptidoglycan , cycloserine , microbiology and biotechnology , mycobacterium tuberculosis , in vivo , alanine , mycobacterium , toxicity , tuberculosis , in vitro , bacteria , antibiotics , chemistry , biology , pharmacology , biochemistry , medicine , amino acid , pathology , genetics , organic chemistry
D-Cycloserine (DCS) is a peptidoglycan inhibitor. Although very effective against Mycobacterium tuberculosis, it is seldom employed in the management of this infection due to its high toxicity. beta-Chloro-D-alanine (another peptidoglycan inhibitor) reduces the MIC of DCS from 50 to 2.5 mg/L at a concentration significantly below its MIC for this organism. A reduction in bacterial viability and significant growth inhibition (as quantified by the X/Y quotient for the Bactec radiometric procedure) were observed with subinhibitory concentrations of both drugs. It is suggested that this powerful synergic effect should be the object of in vivo and eventually clinical trials.
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