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2.
Bull Cancer ; 97(11): 1231-9, 2010 Nov.
Artigo em Francês | MEDLINE | ID: mdl-21059489

RESUMO

Contrary to current belief, the concept of microRNA (miRNA) is quite old. Indeed, the first report on a small RNA able to control the translation of a specific messenger RNA (and therefore called translational control RNA or tcRNA) dates 35-year back. miRNAs waited until 1993 to be "rediscovered" and become the focus of an intense research activity which led to the discovery of several hundreds of them, to the unraveling of their biosynthesis and of their involvement in numerous physiological and pathological processes, notably in cancer. They represent another testimony to the crucial role plaid by RNA at all levels of gene expression regulation and dysregulation. If the old saying "the roots of cancer lie in our DNA" is still valid, one cannot anymore overlook, as has been the case for too long, that its role is not limited to the univocal expression of protein-coding messengers but rather that many downstream mechanisms exist to control and eventually dramatically alter their expression qualitatively (though alternative splicing) as well as quantitatively thanks to the miRNAs which are the topic of this review.


Assuntos
MicroRNAs/fisiologia , Neoplasias/genética , Regulação Neoplásica da Expressão Gênica/fisiologia , Genes Supressores de Tumor/fisiologia , Humanos , MicroRNAs/biossíntese , MicroRNAs/genética , Mutação/genética , Neoplasias/diagnóstico , Neoplasias/metabolismo , Oncogenes/fisiologia , Prognóstico
11.
Bull Cancer ; 87(6): 445, 2000 Jun.
Artigo em Francês | MEDLINE | ID: mdl-10903783
15.
Bull Cancer ; 87(1): 7, 2000 Jan.
Artigo em Francês | MEDLINE | ID: mdl-10673625
19.
Bull Cancer ; 86(7-8): 611-3, 1999.
Artigo em Francês | MEDLINE | ID: mdl-10477376

RESUMO

This paper summarizes the contradictory epidemiological data concerning the association between vegetal fibres intake and colorectal cancer incidence. The key to these discrepancies might reside in the different amounts and ratios of butyrate and other short chain fatty acids (SCFA) produced by colonic anaerobic bacteria during fermentation of fibers from different origins, wheat bran fibers being better producers and therefore more protective. Butyrate, an established histone deacetylase inhibitor, acts by favoring an active chromatin configuration of the P21WAF1/CIP1 gene which, as an inhibitor of cyclin-dependent protein-kinases, blocks the cell cycle.


Assuntos
Ácido Butírico/metabolismo , Neoplasias do Colo/prevenção & controle , Fibras na Dieta/administração & dosagem , Acetilação , Neoplasias do Colo/epidemiologia , Fibras na Dieta/metabolismo , Ácidos Graxos Voláteis/metabolismo , Histonas/metabolismo , Humanos
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