Neutralization of IL-10 Exacerbates Cycloheximide-Induced Hepatocellular Apoptosis and Necrosis

作者：Kumagai Kazuyoshi^*; Ito Kazumi; Ando Yosuke; Hakamata Shinobu; Teranishi Munehiro; Nakayama Hiroyuki; Manabe Sunao

来源：Toxicologic Pathology, 2009, 37(4): 536-546.

DOI：10.1177/0192623309336153

• cycloheximide
• interleukin-10
• apoptosis
• neutralizing antibody
• liver

Cycloheximide (CHX)-induced liver injury in rats has been characterized by hepatocellular apoptosis and necrosis. We previously reported that Kupffer cell inactivation causes a reduction of IL-10 production, resulting in the exacerbation of CHX-induced liver injury. In this study, we directly evaluate the role of IL-10 in liver injury by a pretreatment with anti-IL-10 neutralizing antibody (IL-10Ab). Rats were given goat IgG or IL-10Ab before being treated with CHX (CHX group or IL-10Ab/CHX group). In the CHX group, the CHX treatment markedly induced hepatic mRNA and serum protein levels of IL-10. The up-regulation of IL-10 was significantly suppressed in the IL-10Ab/CHX group. Blocking IL-10 in the IL-10Ab/CHX group led to greater increases in hepatic mRNA and serum levels of proinflammatory cytokines, such as TNF-alpha and IL-6. The IL-10Ab/CHX group developed more severe hepatocellular apoptosis, neutrophil transmigration, and necrotic change of hepatocytes compared with the CHX group. The caspase activities and mRNA levels of Cc120, LOX-1, and E-selectin in the livers were significantly higher in the IL-10Ab/CHX group than the CHX group. These results demonstrate that IL-10 plays an important role in counteracting the effect of proinflammatory cytokines, such as a TNF signaling cascade, and in attenuating the CHX-induced liver injury.

• 出版日期2009-6