Sex differences in inflammatory cytokine production in hepatic ischemia-reperfusion

被引:22
|
作者
Crockett E.T. [1 ]
Spielman W. [1 ]
Dowlatshahi S. [1 ]
He J. [1 ]
机构
[1] Department of Physiology, College of Human Medicine, Michigan State University, East Lansing, MI
关键词
Hepatic Injury; Neutrophil Infiltration; Plasma Cytokine; Hepatocellular Injury; Hepatic Ischemia;
D O I
10.1186/1476-9255-3-16
中图分类号
学科分类号
摘要
Background: The inflammatory response to hepatic ischemia-reperfusion (I/R) is associated with an increase in cytokine production. Studies have documented that sex hormones modulate both the innate and adaptive immune responses, and that females are more robust than males. The aim of this study was to determine whether a sex difference in cytokine response to hepatic I/R exists under normal pathophysiologic condition without hormone intervention. Methods: Adult C57BL/6 mice underwent 90 min of hepatic ischemia followed by various reperfusion periods (0, 1.5, 3, 6 hr). Plasma cytokine TNF-α, IL-6, MIP-2, and KC were measured. Liver injury was assessed by plasma alanine transaminase (ALT) levels and liver histopathology. Results: A reperfusion time-dependent increase in hepatocellular injury was observed in both males and females, as indicated by increasing levels of plasma ALT and liver histopathology. The plasma cytokines were significantly increased in both female and male I/R groups compared to their respective sham counterparts. However, there was a significant difference in cytokine kinetics between the female and male I/R groups. Female mice initially had a higher level of IL-6, KC, and MIP-2 in response to I/R, which began to decline after 3 hr of reperfusion and were significantly lower than the male I/R counterparts by 6 hr of reperfusion. In contrast, the hepatocellular injur y and TNF production were only moderately lower in female IR than male IR. Conclusion: The study underscores role of the gender in differential inflammatory cytokine expression in response to hepatic I/R, which may reflect the host response outcome. © 2006 Crockett et al; licensee BioMed Central Ltd.
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