title: Modification of olivomycin A at the side chain of the aglycon yields the derivative with perspective antitumor characteristics.
abstract: A novel way of chemical modification of the antibiotic olivomycin A (1) at the side chain of the aglycon moiety was developed. Interaction of olivomycin A with the sodium periodate produced the key acid derivative olivomycin SA (2) in 86% yield. This acid was used in the reactions with different amines in the presence of benzotriazol-1-yl-oxy-trispyrrolidino-phosphonium hexafluorophosphate (PyBOP) or diphenylphosphoryl azide (DPPA) to give corresponding amides. Whereas olivomycin SA was two orders of magnitude less cytotoxic than the parent antibiotic, the amides of 2 demonstrated a higher cytotoxicity. In particular, N,N-dimethylaminoethylamide of olivomycin SA showed a pronounced antitumor effect against transplanted experimental lymphoma and melanoma and a remarkably high binding constant to double stranded DNA. The therapeutic effects of this derivative were achievable at tolerable concentrations, suggesting that modifications of the aglycon's side chain, namely, its shortening to methoxyacetic residue and blocking of free carboxyl group, are straightforward for the design of therapeutically applicable derivatives of olivomycin A.
authors.affiliation: Gause Institute of New Antibiotics, Russian Academy of Medical Sciences, 11 B. Pirogovskaya Street, Moscow 119021, Russian Federation.
authors.forename: Anna N
authors.initials: AN
authors.lastname: Tevyashova
authors.forename: Alexander A
authors.initials: AA
authors.lastname: Shtil
authors.forename: Eugenia N
authors.initials: EN
authors.lastname: Olsufyeva
authors.forename: Yury N
authors.initials: YN
authors.lastname: Luzikov
authors.forename: Marina I
authors.initials: MI
authors.lastname: Reznikova
authors.forename: Lyubov G
authors.initials: LG
authors.lastname: Dezhenkova
authors.forename: Elena B
authors.initials: EB
authors.lastname: Isakova
authors.forename: Vladimir M
authors.initials: VM
authors.lastname: Bukhman
authors.forename: Nikita A
authors.initials: NA
authors.lastname: Durandin
authors.forename: Alexander M
authors.initials: AM
authors.lastname: Vinogradov
authors.forename: Vladimir A
authors.initials: VA
authors.lastname: Kuzmin
authors.forename: Maria N
authors.initials: MN
authors.lastname: Preobrazhenskaya
mesh_terms: D000818:Animals; D000903:Antibiotics, Antineoplastic / Q000737:chemistry* / Q000494:pharmacology / Q000627:therapeutic use*; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D004247:DNA / Q000378:metabolism; D005260:Female; D006801:Humans; D008223:Lymphoma / Q000188:drug therapy; D008545:Melanoma / Q000188:drug therapy; D051379:Mice; D009848:Olivomycins / Q000737:chemistry / Q000494:pharmacology / Q000627:therapeutic use
chemical_list: D000903:Antibiotics, Antineoplastic; C025047:olivomycin A; D009848:Olivomycins; D004247:DNA