RNA cleavage and inhibition of protein synthesis by bleomycin.
Chem Biol
; 10(1): 45-52, 2003 Jan.
Article
em En
| MEDLINE
| ID: mdl-12573697
ABSTRACT
Bleomycin is a clinically used antitumor antibiotic long thought to function therapeutically at the level of DNA cleavage. Recently, it has become clear that bleomycin can also cleave selected members of all major classes of RNA. Using the computer program COMPARE to search the database established by the Anticancer Drug Screening Program of the National Cancer Institute, a possible mechanism-based correlation was found between onconase, an antitumor ribonuclease currently being evaluated in phase III clinical trials, and the chemotherapeutic agent bleomycin. Following these observations, experimentation revealed that bleomycin caused tRNA cleavage and DNA-independent protein synthesis inhibition in rabbit reticulocyte lysate and when microinjected into Xenopus oocytes. The correlation of protein synthesis inhibition to the previously reported site-specific RNA cleavage caused by bleomycin supports the thesis that RNA cleavage may constitute an important element of the mechanism of action of bleomycin.
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Base de dados:
MEDLINE
Assunto principal:
Biossíntese de Proteínas
/
Bleomicina
/
RNA
/
Inibidores da Síntese de Proteínas
/
Antineoplásicos
Limite:
Animals
/
Humans
Idioma:
En
Revista:
Chem Biol
Assunto da revista:
BIOLOGIA
/
BIOQUIMICA
/
QUIMICA
Ano de publicação:
2003
Tipo de documento:
Article
País de afiliação:
Estados Unidos