[Mitogenic action of factors secreted by avian erythroblastosis virus transformed cells].
We describe here the capacity of erythroid LSCC HD3 cells, transformed with a ts mutant of avian erythroblastosis virus, to grow in a chemically defined medium without serum at 36 degrees C, but not at 41 degrees C. At this latter temperature the activity of v-erbB oncogene is suppressed. However, cell growth at 41 degrees C could take place either by addition of the medium derived from LSCC HD3 cells grown at 36 degrees C (conditioned medium), or by addition of fetal calf serum. These results show that LSCC HD3 cells, maintained under conditions in which the v-erbB oncogene is active, secrete growth factor(s) which exhibit a mitogenic effect similar to that observed with calf serum.
D001355:Alpharetrovirus / Q000235:genetics*; D000818:Animals; D001354:Avian Leukosis Virus / Q000235:genetics*; D002455:Cell Division; D002460:Cell Line; D002472:Cell Transformation, Viral; D005814:Genes, Viral; D008934:Mitogens / Q000378:metabolism*; D009154:Mutation; D009857:Oncogenes; D014176:Protein Biosynthesis; D013997:Time Factors
D008934:Mitogens
Activité mitogène de facteurs secrétés par des cellules transformées par le virus de l'érythroblastose aviaire.