title: Human interferon-gamma increases adhesion of cultured carcinoma cells to the substratum.
abstract: Effects of human recombinant-DNA derived interferon-gamma and -alpha 2 on the adhesion of cultured breast cancer cells (BT-20, ZR-75.1, MCF-7, 734-B and Hs-578-T), larynx carcinoma cells (HEP-2), epidermoid carcinoma cells (KB), lung carcinoma cells (CCL 185), and ovarian carcinoma cells (1847) to the surface of cell culture plastic dishes were studied. Layered cells were detached after a 3-day treatment with interferon either by trypsin-EDTA, trypsin, protease or cooling to 4 degrees C. Treatment with interferon-gamma (500 unit/ml) significantly increased the incubation time for trypsin-EDTA, EDTA and at 4 degrees C necessary to bring cells into suspension for the 4 cell lines BT-20, ZR-75.1, MCF-7 and HEP-2. Interferon-alpha 2 was not able to induce a similar effect. Reattachment of interferon-gamma treated ZR-75.1 cells was not increased after harvesting by trypsinization or EDTA action. Decreased adhesion of cultured cells is associated with transformation and the effects of interferon-gamma may be explained by reinforced normal phenotype. Interferon-gamma induced adhesion was not associated with other interferon effects especially the anti-proliferative activity or modulation of surface antigens.
mesh_terms: D001943:Breast Neoplasms / Q000473:pathology; D002294:Carcinoma, Squamous Cell / Q000473:pathology; D002448:Cell Adhesion / Q000187:drug effects*; D002460:Cell Line; D004274:DNA, Recombinant; D005260:Female; D006801:Humans; D007370:Interferon Type I / Q000494:pharmacology; D007371:Interferon-gamma / Q000494:pharmacology*; D007822:Laryngeal Neoplasms / Q000473:pathology; D008175:Lung Neoplasms / Q000473:pathology; D010051:Ovarian Neoplasms / Q000473:pathology; D014407:Tumor Cells, Cultured / Q000187:drug effects*
chemical_list: D004274:DNA, Recombinant; D007370:Interferon Type I; D007371:Interferon-gamma