Inhibition of potassium transport and growth of mycobacteria exposed to clofazimine and B669 is associated with a calcium-independent increase in microbial phospholipase A2 activity.


Altered phospholipase A2 (PLA2) activity and its relationship to cation (K+, Ca2+) uptake and growth were investigated in mycobacteria exposed to the riminophenazine antimicrobial agents, clofazimine and B669 (0.15-2.5 mg/L). Microbial PLA2 activity was measured using a radiometric thin-layer chromatography procedure, whereas K+ and Ca2+ transport were… (More)


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