Lane J R, Neumann D A, Lafond-Walker A, Herskowitz A, Rose N R
Department of Immunology and Infectious Diseases, Johns Hopkins University School of Hygiene and Public Health, Baltimore, Maryland 21205.
J Exp Med. 1992 Apr 1;175(4):1123-9. doi: 10.1084/jem.175.4.1123.
We have previously demonstrated that bacterial lipopolysaccharide (LPS) is capable of promoting Coxsackie B3 (CB3)-induced myocarditis in genetically resistant B10.A mice. Because LPS is known to increase production of various cytokines, we tested CB3-infected, LPS-treated mice for the presence of interleukin 1 (IL-1) and tumor necrosis factor (TNF). We found significantly increased amounts of both cytokines in the sera of CB3/LPS-treated mice compared with animals treated only with LPS. We also found immunohistochemical evidence for local production of these cytokines in the cardiac tissue of CB3/LPS-treated mice. Treatment with IL-1 or TNF alone promoted CB3-induced autoimmune myocarditis in resistant B10.A mice. Myocarditis was also observed when uninfected mice were immunized with syngeneic heart extract in the presence of IL-1 or TNF.
我们之前已经证明,细菌脂多糖(LPS)能够在基因抗性B10.A小鼠中促进柯萨奇B3(CB3)诱导的心肌炎。由于已知LPS会增加多种细胞因子的产生,我们检测了感染CB3且经LPS处理的小鼠体内白细胞介素1(IL-1)和肿瘤坏死因子(TNF)的存在情况。我们发现,与仅用LPS处理的动物相比,经CB3/LPS处理的小鼠血清中这两种细胞因子的含量显著增加。我们还发现了免疫组化证据,证明在经CB3/LPS处理的小鼠心脏组织中这些细胞因子是局部产生的。单独用IL-1或TNF处理可促进抗性B10.A小鼠发生CB3诱导的自身免疫性心肌炎。当未感染的小鼠在存在IL-1或TNF的情况下用同基因心脏提取物免疫时,也观察到了心肌炎。