Cell Regul. 1991 Sep;2(9):709-18.

Potential oncogenic effects of basic fibroblast growth factor requires cooperation between CUG and AUG-initiated forms.

Couderc B, Prats H, Bayard F, Amalric F.

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Centre de Recherche de Biochimie, Hôpital Rangueil, Toulouse, France.

Abstract

Normal adult bovine aortic endothelial cells were infected with various recombinant retroviruses expressing one, two, or three human basic fibroblast growth factor (bFGF) proteins normally synthesized by an alternative use of translation initiation codons. We show here that the constitutive expression of the AUG-initiated from (18 kDa) leads the transfected cells to form colonies in soft agar. The expression of the high molar weight (HMW) forms (22.5 and 21 kDa) initiated at one of the two CUG initiation codons allows cell immortalization, whereas the tumorigenic potential is reached when the three forms are constitutively expressed. Furthermore, we provide evidence that constitutive expression of (HMW) bFGF forms has a down-regulation effect on bFGF synthesis from the gene naturally active in parental endothelial cells.

PMID:: 1660310; [PubMed - indexed for MEDLINE]
PMCID:: PMC361865

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