2001
DOI: 10.1093/emboj/20.8.1952
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Embryonic lethality and fetal liver apoptosis in mice lacking the c-raf-1 gene

Abstract: The Raf kinases play a key role in relaying signals elicited by mitogens or oncogenes. Here, we report that c-raf-1(-/-) embryos are growth retarded and die at midgestation with anomalies in the placenta and in the fetal liver. Although hepatoblast proliferation does not appear to be impaired, c-raf-1(-/-) fetal livers are hypocellular and contain numerous apoptotic cells. Similarly, the poor proliferation of Raf-1(-/-) fibroblasts and hematopoietic cells cultivated in vitro is due to an increase in the apopto… Show more

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Cited by 274 publications
(302 citation statements)
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“…Fas activation stimulates the formation of Raf-1-ROCK2 complexes thereby down-regulating ROCK2 activity. This mechanism may contribute to the phenotype of Raf-1 deficient mice such as fetal liver apoptosis, embryonic lethality, and selective hypersensitivity to Fas-induced cell death [52,87].…”
Section: Substrates Of Rockmentioning
confidence: 99%
“…Fas activation stimulates the formation of Raf-1-ROCK2 complexes thereby down-regulating ROCK2 activity. This mechanism may contribute to the phenotype of Raf-1 deficient mice such as fetal liver apoptosis, embryonic lethality, and selective hypersensitivity to Fas-induced cell death [52,87].…”
Section: Substrates Of Rockmentioning
confidence: 99%
“…This timing in death of C-Raf Ϫ/ Ϫ embryos coincides with the period in which the developing liver becomes a well differentiated organ. The mutant mice display poorly vascularized placentas and increased apoptosis in embryonic tissues, especially in the liver (Mikula et al, 2001).…”
Section: C-raf (Raf-1)mentioning
confidence: 99%
“…L'invalidation de l'un ou l'autre de ces deux gènes cause une létalité embryonnaire. En l'absence de C-Raf, des niveaux d'apoptose importants sont observés dans plusieurs tissus, en particulier hépatique [14]. De la même façon, l'absence de B-Raf affecte la survie des cellules neuronales [15,16].…”
Section: Effets Anti-apoptotiques Des Kinases Rafunclassified