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J Korean Cancer Assoc > Volume 27(1); 1995 > Article
Journal of the Korean Cancer Association 1995;27(1): 1-8.
사람 위암세포에 c-erbB-2 단백의 발현에 따른 자연살해세포의 세포독작용의 변화
박병우, 심강섭, 노성훈, 김충배, 이경식
Natural Killer ( NK ) Cell cytotoxicity According to the Expression of c-erbB-2 Protein in Human Gastric Cancer Cells
Byeong Woo Park, Kang Sup Shim, Sung Hoon Noh, Coong Bai Kim, Kyung Shik Lee
Although there is still controversy to the relationship between c-erbB-2 protein expression and prognosis of the gastric carcinoma, there were many reports about the poor prognosis with the expression of c-erbB-2 in gastric carcinoma. The mechanisms underlying this phenomenon are not known. However several possibilities such as acquired resistance to 5-Fluorouracil(5-FU) and resistance to the host immune system were suggested. So we performed this study to evaluate whether c-erbB-2 expression can alter the natural killeriNK) cell cytotoxic activity. Using single cell suspensions from primary gastric cancer tissues and malignant ascites due to stomach cancer, the immunohistochemical reactivity to c-cerB-2 protein was examined and we performed the tests for NK cell cytotoxic activity. The c-erbB-2(+) cancer cells were significantly more resistant to NK cell cytotoxic activity than c-erbB-2( ) cancer cells. However there was no significant difference in the resiatance to NK cell cytotoxic activity according to their immunohistochemical staining intensities. These results suggest that the resistance to the NK cel1 cytotoxicity may be one of the possi- ble mechanisms of the poorer prognosis of the c-erbB-2(+ ) gastric cancers.
Key words: c-erbB-2 protein, Gastric cancer ce11, NK cell cytotoxicity
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