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Effect of Antibiotics on the Lipases of Corynebacterium acnes in Vitro
S. Madli Puhvel, PhD;
Ronald M. Reisner, MD
Arch Dermatol. 1972;106(1):45-49.
Abstract
The effect of various antibiotics on the hydrolytic activity of partially purified lipases from Corynebacterium acnes on tributyrin was studied by continuous potentiometric titration and by agar diffusion assays. Tetracycline hydrochloride, chlortetracycline hydrochloride, and demeclocycline hydrochloride inhibited C acnes lipase activity by 70% to 80% at concentrations of 500 µg/ml of substrate. Penicillin G potassium, erythromycin, neomycin sulfate, and streptomycin sulfate had no inhibitory effect on C acnes lipase activity.
However, the minimum concentration of tetracyclines which produced detectable lipase inhibition in vitro was higher than the concentrations of tetracyclines found in skin during the usual regimen of tetracycline therapy in acne vulgaris, and much higher than the minimum bacteriostatic levels of tetracyclines used on C acnes in vitro.
Author Affiliations
Los Angeles
From the Department of Medicine, Division of Dermatology, UCLA School of Medicine, Los Angeles (Drs. Puhvel and Reisner), and the Department of Medicine, Division of Dermatology, Harbor General Hospital, Torrance, Calif (Dr. Reisner).
Footnotes
Accepted for publication Oct 26, 1971.
Read before the national meeting of the American Society for Microbiology, Minneapolis, May 4, 1971.
Reprint requests to Department of Medicine, Division of Dermatology, UCLA School of Medicine, Los Angeles 90024 (Dr. Puhvel).
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