PMID- 7591288 OWN - NLM STAT- MEDLINE DCOM- 19951228 LR - 20190708 IS - 0020-7136 (Print) IS - 0020-7136 (Linking) VI - 63 IP - 5 DP - 1995 Nov 27 TI - Fibroblast growth factor 3 is tumorigenic for mouse mammary cells orthotopically implanted in nude mice. PG - 702-9 AB - Fibroblast growth factor-3 (Fgf-3) is involved in mouse mammary tumorigenesis since the Fgf-3 gene is a main target for mouse mammary tumor virus (MMTV) insertional activation. Its action has been correlated with the appearance of pregnancy-dependent tumors. We describe here the effects on normal mouse mammary EF43 cells of the short Fgf-3 protein form which enters the secretory pathway. The genes, Fgf-3 AUG or Fgf-4 for comparison, were introduced in the mammary cells by means of retroviral vectors. Fgf-3 expression did not modify EF43 cell morphology, had no effect on growth in soft agar nor on the inhibitory action exerted on cell growth by TGF-beta 1; however, it allowed the cells to grow under low serum conditions in the absence of insulin and EGF. The Fgf-3-expressing cells were not tumorigenic in nude mice when injected s.c., but tumors developed when the cells were implanted in the mammary gland. The tumors appeared after some latency; they had a slow growth phase followed by a phase of increased growth rate. An identical tumoral growth pattern was observed in ovariectomized nude mice. These results show that the secreted Fgf-3 form can initiate tumorigenesis and that the induced tumors are hormone-independent. The mammary-gland environment, however, is required for the EF43 cells to grow and differentiate. During that process, which resembles natural cell growth during mammary-gland development at pregnancy, the cells could pass through a stage which is specifically sensitive to Fgf-3. FAU - Hajitou, A AU - Hajitou A AD - Laboratory of Fundamental Virology, University of Liege, Belgium. FAU - Calberg-Bacq, C M AU - Calberg-Bacq CM LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Int J Cancer JT - International journal of cancer JID - 0042124 RN - 0 (Fgf3 protein, mouse) RN - 0 (Fibroblast Growth Factor 3) RN - 0 (Proto-Oncogene Proteins) RN - 62031-54-3 (Fibroblast Growth Factors) SB - IM MH - 3T3 Cells MH - Animals MH - Cell Division/drug effects MH - Cell Transformation, Neoplastic/*genetics MH - Cell Transplantation MH - Dogs MH - Female MH - Fibroblast Growth Factor 3 MH - Fibroblast Growth Factors/*genetics/physiology MH - Gene Expression MH - Mammary Glands, Animal/cytology MH - Mammary Neoplasms, Experimental/*genetics MH - Mice MH - Mice, Nude MH - Neoplasms, Hormone-Dependent/*genetics MH - Proto-Oncogene Proteins/*genetics/physiology MH - Transfection EDAT- 1995/11/27 00:00 MHDA- 1995/11/27 00:01 CRDT- 1995/11/27 00:00 PHST- 1995/11/27 00:00 [pubmed] PHST- 1995/11/27 00:01 [medline] PHST- 1995/11/27 00:00 [entrez] AID - 10.1002/ijc.2910630516 [doi] PST - ppublish SO - Int J Cancer. 1995 Nov 27;63(5):702-9. doi: 10.1002/ijc.2910630516.