Madindoline, a novel inhibitor of IL-6 activity from Streptomyces sp. K93-0711. I. Taxonomy, fermentation, isolation and biological activities.
J Antibiot (Tokyo)
; 49(11): 1091-5, 1996 Nov.
Article
em En
| MEDLINE
| ID: mdl-8982336
ABSTRACT
Selective growth inhibition against IL-6-dependent cells was detected in fermentation extracts of a microbial strain, K93-0711, which was characterized as Streptomyces species. Active metabolite, termed madindoline A and B, were isolated, and the structure was determined to be 3a-hydroxy-indoline with diketocyclopentene at the N position. Madindoline A and B displayed dose-dependent inhibition of MH60 cells, an IL-6-dependent cell line, in presence of 0.1 U/ml IL-6. The IC50 for madindoline A and B against this cell line was 8 microM and 30 microM, respectively. These compounds did not inhibit the growth of cell lines which are not IL-6 dependent and the growth inhibition of the MH60 cell line was reversed by addition of excess, 0.4 U/ml, of IL-6 to the culture media. These compounds did not show any antimicrobial activity at a concentration of 1,000 micrograms/ml.
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Base de dados:
MEDLINE
Assunto principal:
Interleucina-6
/
Compostos Bicíclicos Heterocíclicos com Pontes
/
Indóis
Tipo de estudo:
Prognostic_studies
Limite:
Humans
Idioma:
En
Ano de publicação:
1996
Tipo de documento:
Article