Palin Karine, Bluthé Rose-Marie, McCusker Robert H, Moos Françoise, Dantzer Robert, Kelley Keith W
Department of Animal Sciences, Integrative Immunology and Behavior Program, Laboratory of Integrative Immunophysiology, University of Illinois at Urbana--Champaign, IL, USA.
J Neuroimmunol. 2007 Jul;187(1-2):55-60. doi: 10.1016/j.jneuroim.2007.04.011. Epub 2007 May 18.
A variety of pathogenic insults cause synthesis of tumor necrosis factor (TNF)alpha in the brain, resulting in sickness behavior. Here we used TNF-receptor (TNF-R)2-deficient and wild-type mice to demonstrate that the reduction in social exploration of a novel juvenile, the increase in immobility and the loss of body weight caused by central TNFalpha (i.c.v., 50 ng/mouse) are blocked by central pre-treatment with the multifunctional peptide, insulin-like growth factor (IGF-I; i.c.v., 300 ng/mouse). These results establish that sickness behavior induced by central TNFalpha via the TNF-R1 (p55) is directly opposed by IGF-I in the brain.
多种致病性损伤会导致大脑中肿瘤坏死因子(TNF)α的合成,从而引发疾病行为。在此,我们使用肿瘤坏死因子受体(TNF-R)2缺陷型和野生型小鼠来证明,中枢注射TNFα(脑室内注射,50 ng/只小鼠)所导致的对陌生幼鼠社交探索行为的减少、不动时间的增加以及体重的减轻,可被多功能肽胰岛素样生长因子(IGF-I;脑室内注射,300 ng/只小鼠)的中枢预处理所阻断。这些结果表明,中枢TNFα通过TNF-R1(p55)诱导的疾病行为在大脑中直接受到IGF-I的对抗。