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The effect of surgical stress and endotoxin‐induced sepsis on the NK‐cell activity, distribution and pulmonary clearance of YAC‐1 and melanoma cells
Author(s) -
TOFT P.,
DAGNÆSHANSEN F.,
TØNNESEN E.,
BASSE P. M.
Publication year - 1999
Publication title -
apmis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.909
H-Index - 88
eISSN - 1600-0463
pISSN - 0903-4641
DOI - 10.1111/j.1699-0463.1999.tb01565.x
Subject(s) - cytotoxicity , melanoma , medicine , spleen , interleukin 12 , cell , immunology , natural killer cell , sepsis , cancer research , biology , cytotoxic t cell , in vitro , biochemistry , genetics
Following surgery the activity of natural killer (NK) cells is decreased in the blood. It is possible that sepsis with release of endotoxin will further decrease the NK‐cell activity. The purpose of the present study was to investigate the NK‐cell cytotoxicity, the clearance in the lungs of YAC‐1 and melanoma cells, as well as the distibution of NK‐cells in the liver, following abdominal surgery and intraperitoneally (i.p.) administered endotoxin. Ten mice in each group were allocated to abdominal surgery, i.p. endotoxin or anaesthesia alone. Following abdominal surgery, the cytotoxicity of NK‐cells isolated from the spleen was decreased and 4 h after injection the clearance of YAC‐1 cells from the lungs was only 79.5±6.1% compared to 99.5±0.3% in the control group. The number of NK‐cells in the liver was also significantly reduced following abdominal surgery. In contrast, i.p. endotoxin increased the activity of NK‐cells by 28.5% compared to 11.8% in the control group and 8.1% in the surgery group, lowered the number of melanoma metastases in extrapulmonary organs and significantly increased the number of NK‐cells in the liver. Following abdominal surgery, activity of NK‐cells, pulmonary clearance and number of NK‐cells in the liver were decreased. The number of NK‐cells in the liver correlated with the NK‐cell activity throughout the study. The increased NK‐cell cytotoxicity and the increased number of NK‐cells in the liver following i.p. administered endotoxin might initially be an appropriate measure against intra‐abdomnal infection.