Effect of a Polyene Antibiotic on Growth and Phosphate Uptake by Candida albicans

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Abstract
The polyene antibiotic, amphotericin, inhibited phosphate uptake in C. albicans more strongly than it inhibited growth. Cultures grown from an inoculum of young (2 h) cells were more affected than those inoculated with old (24 h) cells. The polyene displays a double effect on C. albicans (and presumably on other eukaryotic cells): it interferes with membrane sterols and inhibits synthesis of a factor (or factors) during growth. Whether this factor(s) interferes with uptake of the polyene antibiotic or neutralizes its effect by reacting with it remains unsolved.