Immunosuppressive Activity of Cepacidine A, a Novel Antifungal Antibiotic Produced by Pseudomonas cepacia

  • LEE, CHUL-HOON (Department of Medical Genetics, College of Medicine, Hanyang University) ;
  • JUNG-WOO SUH (R & D Center of Bioscience Institute of Science and Technology, Cheiljedang Corp.,) ;
  • YOUL-HEE CHO (Department of Medical Genetics, College of Medicine, Hanyang University)
  • Published : 1999.10.01

Abstract

Cepacidine A was first identified as a novel antifungal antibiotic which was isolated from the culture broth of Pseudomonas cepacia AF200l. It showed a potent in vitro antifungal activity against various pathogenic fungi, but did not show any activity against bacteria. Recently, the immunosuppressive action of cepacidine A was discovered using an in vitro screening system involving inhibition of the proliferation of murine lymphocytes stimulated by 2 mitogens, and also by in vivo mouse models involving inhibition of delayed type hypersensitivity and SRBC hemagglutination. Cepacidine A showed a significant activity of cellular immunosuppression (ED/sub 50/) at concentration levels of 1-3 ㎎/㎏, i.p.. Unfortunately, the delayed toxicity at a dose of above 3 ㎎/㎏ i.p. was apparent.

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