Retinoic acid induces TGFbeta-dependent autocrine fibroblast growth. - Archive ouverte HAL Access content directly
Journal Articles Oncogene Year : 2008

Retinoic acid induces TGFbeta-dependent autocrine fibroblast growth.

Abstract

To evaluate the role of murine TFIID subunit TAF4 in activation of cellular genes by all-trans retinoic acid (T-RA), we have characterized the T-RA response of taf4(lox/-) and taf4(-/-) embryonic fibroblasts. T-RA regulates almost 1000 genes in taf4(lox/-) cells, but less than 300 in taf4(-/-) cells showing that TAF4 is required for T-RA regulation of most, but not all cellular genes. We further show that T-RA-treated taf4(lox/-) cells exhibit transforming growth factor (TGF)beta-dependent autocrine growth and identify a set of genes regulated by loss of TAF4 and by T-RA corresponding to key mediators of the TGFbeta signalling pathway. T-RA rapidly and potently induces expression of connective tissue growth factor (CTGF) via a conserved DR2 type response element in its proximal promoter leading to serum-free autocrine growth. These results highlight the role of TAF4 as a cofactor in the cellular response to T-RA and identify the genetic programme of a novel cross talk between the T-RA and TGFbeta pathways that leads to deregulated cell growth.
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Dates and versions

hal-00282573 , version 1 (27-05-2008)

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Anas Fadloun, Dominique Kobi, Laurence Delacroix, Doulaye Dembélé, I. Michel, et al.. Retinoic acid induces TGFbeta-dependent autocrine fibroblast growth.. Oncogene, 2008, 27 (4), pp.477-89. ⟨10.1038/sj.onc.1210657⟩. ⟨hal-00282573⟩
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