Cytokine release during hypoxia reoxygenation by Kupffer cells in rats with obstructive jaundice.
The release of cytokine by Kupffer cells during hypoxia/reoxygenation was studied in vitro in male Wistar rats with obstructive jaundice to investigate the kinetics of interleukin-8 (IL-8) release by Kupffer cells during hypoxia/reoxygenation, and to study the influence of endotoxin during the reoxygenation period. The rats were divided into two groups: one that underwent bile duct ligation (group OJ), and one that underwent a sham operation (group C). Kupffer cells were isolated by collagenase digestion and centrifugal elutriation. The cells were first subjected to hypoxia as 95% nitrogen, after which they were given reoxygenation as 95% oxygen. In addition, they were stimulated with lipopolysaccharide (LPS) 0, 1, and 10 ng/ml. In both groups, the levels of IL-8 became increased during the period of hypoxia/reoxygenation, and reoxygenation after hypoxia further intensified IL-8 production. During the period of hypoxia, the IL-8 levels in group OJ were significantly increased compared with those in group C. With the LPS challenge, there was no significant difference in IL-8 levels in either group. In conclusion, obstructive jaundice induces the activation of Kupffer cells, resulting in increased IL-8 production during hypoxia/reoxygenation.
Okamura
K
K
First Department of Surgery, Yamaguchi University School of Medicine, Kogushi, Ube, Japan.
Noshima
S
S
Esato
K
K
D000704:Analysis of Variance; D000818:Animals; D001652:Bile Ducts / Q000601:surgery; D015687:Cell Hypoxia; D002779:Cholestasis / Q000378:metabolism*; D004195:Disease Models, Animal; D004797:Enzyme-Linked Immunosorbent Assay; D066298:In Vitro Techniques; D016209:Interleukin-8 / Q000378:metabolism*; D007728:Kupffer Cells / Q000378:metabolism*; D008026:Ligation; D008070:Lipopolysaccharides; D008297:Male; D051381:Rats; D017208:Rats, Wistar
D016209:Interleukin-8; D008070:Lipopolysaccharides