Hareyama M, Imai K, Oouchi A, Takahashi H, Hinoda Y, Tsujisaki M, Adachi M, Shonai T, Sakata K, Morita K. The effect of radiation on the expression of intercellular adhesion molecule-1 of human adenocarcinoma cells.
Int J Radiat Oncol Biol Phys 1998;
40:691-6. [PMID:
9486621 DOI:
10.1016/s0360-3016(97)00860-2]
[Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
PURPOSE
To investigate the changes in antigenic expression of intercellular adhesion molecule-1 (ICAM-1) caused by ionizing radiation of cultured human adenocarcinoma cells.
METHODS AND MATERIALS
Human colonic BM314 and gastric MKN45 adenocarcinoma cells were irradiated to investigate the expression of ICAM-1 on the cell membrane and in the supernatant. In addition, the ICAM-1 gene expression (mRNA) was analyzed using a ICAM-1 cDNA as a probe.
RESULTS
The expression of ICAM-1 on the membrane was found to increase by irradiation. This effect was also observed in the supernatant. In addition, the irradiated cell population showed slight, but clear increases in ICAM-1 mRNA expression.
CONCLUSIONS
These results show that the enhancement of expression of ICAM-1 by radiation takes place at the ICAM-1 gene expression (mRNA) level. The results suggest that the low dose radiation may be useful for accumulating LFA-1 positive cytotoxic T lymphocytes (CTL) at the local tumor tissue, by which tumor cells may be attacked.
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