PMID- 2043488 OWN - NLM STAT- MEDLINE DCOM- 19910717 LR - 20200128 IS - 0923-7534 (Print) IS - 0923-7534 (Linking) VI - 2 IP - 3 DP - 1991 Mar TI - Expression of transforming growth factor alpha (TGF alpha) in breast cancer. PG - 169-82 AB - Transforming growth factor alpha (TGF alpha) is one growth factor that has been circumstantially implicated in regulating the autocrine growth of breast cancer cells. Expression of TGF alpha can be modulated by activated cellular protooncogenes such as ras and by estrogens. For example, the epidermal growth factor (EGF)-responsive normal NOG-8 mouse and human MCF-10A mammary epithelial cell lines can be transformed with either a point-mutated c-Ha-ras protooncogene or with a normal or point-mutated c-neu (erbB-2) protooncogene. In ras transformed NOG-8 and MCF-10A cells but not in neu transformed cells there is a loss in or an attenuated response to the mitogenic effects of EGF. This response may be due in part to an enhanced production of endogenous TGF alpha that is coordinately and temporally linked to the expression of the activated ras gene and to the acquisition of transformation-associated properties in these cells. TGF alpha mRNA and TGF alpha protein can also be detected in approximately 50-70% of primary human breast tumors. In addition, approximately 2- to 3-fold higher levels of biologically active and immunoreactive TGF alpha can also be detected in the pleural effusions from breast cancer patients as compared with the TGF alpha levels in the serous effusions of noncancer patients. Over-expression of a full-length TGF alpha cDNA in NOG-8 and MCF-10A cells is capable of transforming these cells. Finally, expression of TGF alpha mRNA and production of biologically active TGF alpha protein is also found in normal rodent and human mammary epithelial cells. FAU - Ciardiello, F AU - Ciardiello F AD - Laboratory of Tumor Immunology and Biology, National Cancer Institute, National Institutes of Health, Bethesda. FAU - Kim, N AU - Kim N FAU - McGeady, M L AU - McGeady ML FAU - Liscia, D S AU - Liscia DS FAU - Saeki, T AU - Saeki T FAU - Bianco, C AU - Bianco C FAU - Salomon, D S AU - Salomon DS LA - eng PT - Journal Article PT - Review PL - England TA - Ann Oncol JT - Annals of oncology : official journal of the European Society for Medical Oncology JID - 9007735 RN - 0 (Transforming Growth Factor alpha) SB - IM MH - Animals MH - Breast Neoplasms/*metabolism MH - Cell Transformation, Neoplastic MH - Cells, Cultured MH - Gene Expression MH - Humans MH - Pleural Effusion/metabolism MH - Proto-Oncogenes/physiology MH - Transforming Growth Factor alpha/genetics/*metabolism RF - 112 EDAT- 1991/03/01 00:00 MHDA- 1991/03/01 00:01 CRDT- 1991/03/01 00:00 PHST- 1991/03/01 00:00 [pubmed] PHST- 1991/03/01 00:01 [medline] PHST- 1991/03/01 00:00 [entrez] AID - S0923-7534(20)31416-2 [pii] AID - 10.1093/oxfordjournals.annonc.a057897 [doi] PST - ppublish SO - Ann Oncol. 1991 Mar;2(3):169-82. doi: 10.1093/oxfordjournals.annonc.a057897.