Mechanisms of all-trans retinoic acid-induced differentiation of acute promyelocytic leukemia cells.
J Biosci
;
2000 Sep; 25(3): 275-84
Artigo
em Inglês
| IMSEAR
| ID: sea-111298
ABSTRACT
Retinoic acids (RA) play a key role in myeloid differentiation through their agonistic nuclear receptors (RAR alpha/RXR) to modulate the expression of target genes. In acute promyelocytic leukemia (APL) cells with rearrangement of retinoic acid receptor a (RAR alpha) (including PML-RAR alpha, PLZF-RAR alpha, NPM-RAR alpha, NuMA- RAR alpha or STAT5b-RAR alpha) as a result of chromosomal translocations, the RA signal pathway is disrupted and myeloid differentiation is arrested at the promyelocytic stage. Pharmacologic dosage of all-trans retinoic acid (ATRA) directly modulates PML-RAR alpha and its interaction with the nuclear receptor co-repressor complex, which restores the wild-type RAR alpha/RXR regulatory pathway and induces the transcriptional expression of downstream genes. Analysing gene expression profiles in APL cells before and after ATRA treatment represents a useful approach to identify genes whose functions are involved in this new cancer treatment. A chronologically well coordinated modulation of ATRA-regulated genes has thus been revealed which seems to constitute a balanced functional network underlying decreased cellular proliferation, initiation and progression of maturation, and maintenance of cell survival before terminal differentiation.
Texto completo:
DisponíveL
Índice:
IMSEAR (Sudeste Asiático)
Assunto principal:
Proteínas Repressoras
/
Fatores de Transcrição
/
Transcrição Gênica
/
Translocação Genética
/
Tretinoína
/
Humanos
/
Proteínas Nucleares
/
Células Tumorais Cultivadas
/
Leucemia Promielocítica Aguda
/
Transdução de Sinais
Tipo de estudo:
Estudo prognóstico
Idioma:
Inglês
Revista:
J Biosci
Ano de publicação:
2000
Tipo de documento:
Artigo
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