title: Heat shock and cytokines modulate the expression of adhesion molecules on different human gastric-cancer cell lines.
abstract: In order to understand the expression and modulation of adhesion molecules (AMs) on the surface of different gastric cancers, we studied 4 gastric-cancer cell lines including SC-M1, KATO-III, AGS and AZ-521. The expression of E-cadherin, integrins (beta1, beta2 and beta3), ICAMs (1 and 2), and CD11 (a, b and c) on the cells was detected by flow cytometry. We found that E-cadherin was only expressed on SC-M1 and KATO-III. CD29 (beta1 integrin) could be found in cells of all 4 lines. CD54 (ICAM- 1) could not be detected in AZ-521. In contrast, CD18 (beta2 integrin), CD61 (beta3 integrin), ICAM-2, CD11a, CD11b and CD11c were all absent from these cells. Heat-shock treatment (42.5 degrees C, 60 min) enhanced the expression of E-cadherin, CD29 and CD54 on SC-M1, and of CD29 on AGS. In addition, TNF-alpha (50U/ml) and IL-1beta (10U/ml) modulated the expression of these AMs, like heat-shock treatment. The increment of these adhesion molecules caused by heat shock, TNF-alpha and IL-1beta stimulation on SC-M1 was also confirmed by Western blot analysis. Functionally, these treatments increased the binding between normal human mononuclear cells and SC-Ml cells. The heat-shock treatment could induce a significant amount of TNF-alpha and IL-1beta release from SC-M1 and KATO-III, but seemed irrelevant to the expression of AMs. These results suggest that limited adhesion molecules were expressed on the surface of different gastric cancer cells. Heat shock, IL-1beta and TNF-alpha may selectively modulate the expression of these 3 molecules on some of the cells, and this is probably related to their antitumor effect.
authors.affiliation: Department of Surgery, Veterans General Hospital-Taipei, National Yang-Ming University School of Medicine, Republic of China.
authors.forename: M C
authors.initials: MC
authors.lastname: Hsieh
authors.forename: C W
authors.initials: CW
authors.lastname: Wu
authors.forename: L H
authors.initials: LH
authors.lastname: Wu
authors.forename: W Y
authors.initials: WY
authors.lastname: Lui
authors.forename: F K
authors.initials: FK
authors.lastname: P'eng
authors.forename: C L
authors.initials: CL
authors.lastname: Yu
mesh_terms: D015703:Antigens, CD / Q000378:metabolism; D015153:Blotting, Western; D018845:CD11 Antigens / Q000378:metabolism; D015820:Cadherins / Q000378:metabolism; D015815:Cell Adhesion Molecules / Q000378:metabolism*; D016207:Cytokines / Q000494:pharmacology*; D005434:Flow Cytometry; D006358:Hot Temperature; D006801:Humans; D016023:Integrins / Q000378:metabolism; D018799:Intercellular Adhesion Molecule-1 / Q000378:metabolism; D007375:Interleukin-1 / Q000494:pharmacology; D013274:Stomach Neoplasms / Q000378:metabolism*; D014407:Tumor Cells, Cultured; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology
chemical_list: D015703:Antigens, CD; D018845:CD11 Antigens; D015820:Cadherins; D015815:Cell Adhesion Molecules; D016207:Cytokines; C065289:ICAM2 protein, human; D016023:Integrins; D007375:Interleukin-1; D014409:Tumor Necrosis Factor-alpha; D018799:Intercellular Adhesion Molecule-1