Characterization of the Kupffer cell response to exogenous endotoxin in a rodent model of obstructive jaundice

• Published in: British journal of surgery 1999-05, Vol.86 (5), p.628-633
• Main Authors: Kennedy, J. A., Clements, W. D. B., Kirk, S. J., McCaigue, M. D., Campbell, G. R., Erwin, P. J., Halliday, M. I., Rowlands, B. J.
• Format: Article
• Language: English
• Subjects: Animals; Bile Ducts; Biological and medical sciences; Cholestasis - metabolism; Endotoxemia - etiology; Endotoxins - pharmacokinetics; Gastroenterology. Liver. Pancreas. Abdomen; Interleukin-6 - secretion; Kupffer Cells - metabolism; Ligation; Liver. Biliary tract. Portal circulation. Exocrine pancreas; Male; Medical sciences; Other diseases. Semiology; Random Allocation; Rats; Rats, Wistar; Tumor Necrosis Factor-alpha - secretion
• ISSN: 0007-1323; 1365-2168
• DOI: 10.1046/j.1365-2168.1999.01114.x

Background: Sepsis and endotoxaemia occur frequently in biliary obstruction. Impaired Kupffer cell endocytosis is implicated in these events. Tumour necrosis factor and interleukin 6, secreted by Kupffer cells, are important mediators of sepsis. Kupffer cell clearance of endotoxin and secretion of cytokines in experimental obstructive jaundice were investigated. Methods: Wistar rats were randomized to bile duct ligation, sham operation or control. Groups (n = 8) were studied 1 and 3 weeks after operation. Kupffer cell function was assessed using in situ hepatic perfusion. Results: Clearance of endotoxin was significantly depressed 1 week (median (interquartile range) 20·3 (10·5–27·1) per cent) and 3 weeks (22·1 (20·2–23·2) per cent) after bile duct ligation compared with that in respective sham animals (35·5 (29·9–41·6) and 40·9 (37·7–47·0) per cent) and controls (39·5 (37·3–46·8) per cent). Secretion of tumour necrosis factor was significantly greater 1 week (1113·7 (706·5–1436·8) pg/ml) and 3 weeks (1118·2 (775·7–1484·1) pg/ml) following bile duct ligation compared with that in respective sham animals (114·3 (0–178·5) and 107·6 (63·7–166·4) pg/ml) and controls (0 (0–20·7) pg/ml). Interleukin 6 was not secreted by sham or control animals but was present in the perfusate from jaundiced animals at 1 and 3 weeks (52·5 (9·9–89·5) and 66·2 (60·2–193·1) pg/ml). Conclusion: These data demonstrate simultaneous impairment of Kupffer cell clearance of endotoxin and increased secretion of proinflammatory cytokines in experimental obstructive jaundice. These diverse responses may contribute to the development of sepsis‐related complications in biliary obstruction. © 1999 British Journal of Surgery Society Ltd