title: A new anthracycline antibiotic, IT-62-B, converts the morphology of ras-transformed cells back to normal: taxonomy, fermentation, isolation, structure elucidation and biological characterization.
abstract: A new antibiotic, IT-62-B was isolated from the culture broth of Streptomyces sp. IT-62 by extraction with acetone and then with ethyl acetate, followed by conventional column chromatography using silica gel, Sephadex LH-20 and silica ODS. Its structure (C39H47NO15, MW 769) was determined by 1H, 13C NMR, MS, IR and UV spectrometric techniques to be a new member of the baumycin-group anthracyclines. It showed moderate activity against Gram-positive bacteria and had antitumor activity against various tumor cell lines. Further, antibiotic IT-62-B converted the morphology of ras-transformed NIH3T3 cells and T-cells back to normal at concentrations inhibiting cell growth by 30% or more.
authors.affiliation: Tokushima Research Center, Taiho Pharmaceutical Co., Ltd., Japan.
authors.forename: T
authors.initials: T
authors.lastname: Kawauchi
authors.forename: T
authors.initials: T
authors.lastname: Sasaki
authors.forename: K
authors.initials: K
authors.lastname: Yoshida
authors.forename: H
authors.initials: H
authors.lastname: Matsumoto
authors.forename: R X
authors.initials: RX
authors.lastname: Chen
authors.forename: M Y
authors.initials: MY
authors.lastname: Huang
authors.forename: K S
authors.initials: KS
authors.lastname: Tsuchiya
authors.forename: T
authors.initials: T
authors.lastname: Otani
mesh_terms: D000818:Animals; D018943:Anthracyclines; D000903:Antibiotics, Antineoplastic / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D000970:Antineoplastic Agents / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D005285:Fermentation; D011905:Genes, ras / Q000187:drug effects*; D006801:Humans; D007939:Leukemia L1210 / Q000188:drug therapy; D051379:Mice; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D013302:Streptomyces
chemical_list: D018943:Anthracyclines; D000903:Antibiotics, Antineoplastic; D000970:Antineoplastic Agents; C106747:IT 62-B