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*Department of Anesthesiology and First Department of Surgery, University of Occupational and Environmental Health, School of Medicine, Kitakyushu, Japan
Address correspondence and reprint requests to Masanori Ogata, MD, Department of Anesthesiology, University of Occupational and Environmental Health, 1-1-1 Iseigaoka, Yahatanishiku, Kitakyushu, 807-0555, JAPAN. Address e-mail to mogata{at}med.uoeh-u.ac.jp
It is generally accepted that major surgery is associated with severe alterations of the host-defense mechanisms. We investigated the effect of surgical stress on the immune system. Specifically, we studied the relationship between perioperative lipopolysaccharide (LPS) hyporesponsiveness and monocyte human leukocyte antigen-DR (HLA-DR) and CD14 expression during the perioperative period in 20 patients who underwent partial gastrectomy. This study demonstrated that surgical stress rapidly depressed monocyte mCD14 and HLA-DR expression in comparison with preanesthesia levels. Monocyte mCD14 expression recovered to preoperative levels on the first postoperative day, and monocyte HLA-DR expression recovered by the seventh postoperative day. Consistent with our previous study, LPS-induced tumor necrosis factor (TNF)-
production ex vivo was significantly suppressed from the beginning of the operation. On the contrary, the plasma interleukin-10 concentration started to increase after the surgical incision was made. LPS hyporesponsiveness was least at the end of the operation and returned to preoperative levels on the first postoperative day. In conclusion, the present study demonstrated that LPS responsiveness, plasma interleukin-10 concentration, and monocytes mCD14 and HLA-DR expression altered from the early period of surgery. These alterations may be related to the impairment of the immune system during the perioperative period.
Implications: Recent studies demonstrate that surgical stress induces immune dysfunction. We found that surgical stress rapidly decreased monocyte mCD14 and human leukocyte antigen-DR expression, and endotoxin responsiveness. These findings suggest that early changes of the immune system caused by surgical stress contribute to postoperative complications such as sepsis and multiple organ failure.
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