PMID- 8175016 OWN - NLM STAT- MEDLINE DCOM- 19940603 LR - 20061115 IS - 0090-8258 (Print) IS - 0090-8258 (Linking) VI - 53 IP - 1 DP - 1994 Apr TI - Transforming growth factor alpha localization and role in surface epithelium of normal human ovaries and in ovarian carcinoma cells. PG - 17-23 AB - Transforming growth factor alpha (TGF alpha) has been localized by immunohistochemistry in the ovarian surface epithelial (OSE) cells of sections from normal human ovaries and in epithelial cells of surface crypts. An ovarian cancer cell line (HEY) derived from the surface epithelium of a human ovary also exhibited intense staining for the TGF alpha peptide. Using Northern analysis, HEY cells were shown to express a 4.5-kb transcript of TGF alpha, indicating that the TGF alpha peptide was synthesized by these cells and not taken up from the serum in the culture medium and sequestered by the cells. This was confirmed using a radioimmunoassay, which showed that HEY cells in culture secrete TGF alpha peptide, both as a soluble (0.12 +/- 0.02 ng/mg protein) and as a membrane-anchored (0.06 +/- 0.006 ng/mg protein) form. In both normal OSE cells and HEY cells, TGF alpha acted as a growth promoter: TGF alpha significantly stimulated [3H]thymidine incorporation into DNA of both primary cultures of normal OSE cells (2.7-fold) and of HEY cells (2-fold). This study provides the first demonstration of TGF alpha immunostaining in normal surface epithelial cells and in HEY cells, and suggests that TGF alpha, localized in normal and transformed OSE, is an autocrine growth promoter for these cells. FAU - Jindal, S K AU - Jindal SK AD - Banting & Best Department of Medical Research, University of Toronto, Ontario, Canada. FAU - Snoey, D M AU - Snoey DM FAU - Lobb, D K AU - Lobb DK FAU - Dorrington, J H AU - Dorrington JH LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Gynecol Oncol JT - Gynecologic oncology JID - 0365304 RN - 0 (Transforming Growth Factor alpha) SB - IM MH - Cell Division/physiology MH - Cell Transformation, Neoplastic/pathology MH - Cells, Cultured MH - Epithelium/physiology MH - Female MH - Humans MH - Immunohistochemistry MH - Ovarian Neoplasms/*chemistry/pathology/*physiopathology MH - Ovary/*chemistry/cytology/*physiology MH - Radioimmunoassay MH - Transforming Growth Factor alpha/*analysis/*physiology MH - Tumor Cells, Cultured EDAT- 1994/04/01 00:00 MHDA- 1994/04/01 00:01 CRDT- 1994/04/01 00:00 PHST- 1994/04/01 00:00 [pubmed] PHST- 1994/04/01 00:01 [medline] PHST- 1994/04/01 00:00 [entrez] AID - S0090-8258(84)71080-8 [pii] AID - 10.1006/gyno.1994.1080 [doi] PST - ppublish SO - Gynecol Oncol. 1994 Apr;53(1):17-23. doi: 10.1006/gyno.1994.1080.