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Biological properties of acmycin, a new polyene antibiotic
Folia Microbiologica
|January 1, 1983
Abstract:
Acmycin, a new polyene antibiotic, was fungistatic at low and fungicidal at high concentrations. It produced malformations in conidia of Helminthosporium oryzae and Curvularia lunata and caused leakage of yeast cells. Acmycin was fairly nontoxic to germinating seeds. The intravenous LD50 was 300-400 and intraperitoneal maximum tolerated dose 100-500 mg/kg body mass of mice.
Insights
Acmycin, a novel polyene antibiotic, inhibits fungal growth and causes cell damage. While effective against fungi, it shows low toxicity to plant seeds and moderate toxicity in mice.
Area of Science:
- Microbiology
- Mycology
- Pharmacology
Background:
- Polyene antibiotics are crucial antifungal agents.
- Understanding novel antibiotic mechanisms is vital for combating fungal infections.
Purpose of the Study:
- To characterize the antifungal activity and toxicity of Acmycin.
- To investigate Acmycin's effects on fungal cell morphology and viability.
Main Methods:
- Assessing fungistatic and fungicidal concentrations.
- Microscopic examination of fungal conidia.
- Yeast cell leakage assays.
- Seed germination toxicity tests.
- Acute toxicity studies in mice (LD50 and MTD).
Main Results:
- Acmycin demonstrated fungistatic and fungicidal properties.
- Induced malformations in *Helminthosporium oryzae* and *Curvularia lunata* conidia.
- Caused significant yeast cell membrane leakage.
- Exhibited low toxicity to germinating seeds.
- Intravenous LD50 in mice was 300-400 mg/kg; intraperitoneal MTD was 100-500 mg/kg.
Conclusions:
- Acmycin is a potent polyene antibiotic with broad antifungal potential.
- Its mechanism involves cell membrane disruption, leading to fungal death.
- Acmycin presents a favorable toxicity profile for potential therapeutic applications.