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원발성폐암 환자에서 말초혈액과 국소림프절 단핵구의 NK 및 LAK 활성도에 관한 연구
이이형(Yi Hyeong Lee),김세규(Se Kyu Kim),김형일(Hyung Il Kim),정경영(Kyoung Young Chung),장준(Joon Chang),김성규(Sung Kyu Kim),이원영(Won Young Lee),한명호(Myung Ho Hahn),윤정구(Jung Ku Youn) 대한내과학회 1998 대한내과학회지 Vol.54 No.3
Background: Several lymphocytic populations, such as natural killer(NK) cells and lymphokine-activated killer(LAK) cells, are involved in immunosurveillance against tumors. Whereas the biological significance of the regional lymph node as a tumor barrier remains unclear, the clinical prognostic relevance of the neoplastic infiltration of these nodes is accepted. It appears that lymph node metastasis are more frequent in lung cancer than in other cancers because of impaired defensive mechanisms in the regional lymph nodes. However little is known about the immunologic function of regional lymph node lymphocytes in patients with lung cancer. Although there is general agreement that the NK and LAK activities of peripheral blood mononuclear cells(PBMC) decreases in patients with various solid and leukemic tumors, this decrease remains unclear with regard to the NK and LAK activities of their regional lymph node mononuclear cells(LNMC). We performed this study to determine the NK and LAK activities of regional lymph node, and to compare with those of peripheral blood in patients with lung cancer. Methods: We measured the NK and LAK activities of PBMC and LNMC that were extirpated at lung cancer operations in 17 patients with lung cancer by 4 hour 51Cr-release assay using K562, Raji cell and allogenous lung cancer cell line(NCIH1092) as a target cell. BT ratio were 12.5:1, 25:1, and 50:l. Results: 1. Recombinant interleukin-2 induced strong cytotoxic activities against various target cells in PBMC and LNMC. 2. In patients with lung cancer, NK and LAK activities against K562 and allogenous lung cancer cell line(NCIH 1092) were lower than those of PBMC. 3. Against Raji cell, NK activities were not significantly different between PBMC and LNMC, but LAK activities were significantly lower than those of PRMC. 4. NK activities against K562, Raji, and NCIH1092 cell were not significantly different between in patients with early stage and advanced stage lung cancer. 5. LAK activities of PBMC and LNMC against K562, Raji, and NCIH1(62 cell were significantly lower in patients with advanced stage than those in patients with early stage lung cancer. Conclusion: NK and LAK activities of LNMC in patients with lung cancer were lower than those of PBMC, but the cytotoxicity was markedly increased after culture with rIL-2.
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