THERAPEUTIC EFFECT OF ANTITUMOR NECROSIS FACTOR-ALPHA ANTIBODY ON THE MURINE MODEL OF VIRAL MYOCARDITIS INDUCED BY ENCEPHALOMYOCARDITIS VIRUS

被引：123

作者：

YAMADA, T ^{[1
]}

MATSUMORI, A ^{[1
]}

SASAYAMA, S ^{[1
]}

机构：

[1] KYOTO UNIV,FAC MED,DEPT INTERNAL MED,DIV 3,SAKYO KU,KYOTO 606,JAPAN

来源：

CIRCULATION | 1994年 / 89卷 / 02期

关键词：

MYOCARDITIS; VIRUSES; ANTIBODIES;

D O I：

10.1161/01.CIR.89.2.846

中图分类号：

R5 [内科学];

学科分类号：

1002 ; 100201 ;

摘要：

Background Tumor necrosis factor-alpha (TNF-alpha) has been reported to have an antiviral effect in vitro; however, its in vivo effect remains to be clarified. Methods and Results To investigate the role of TNF-alpha in viral myocarditis using a murine model induced by encephalomyocarditis virus (EMCV), we evaluated (1) plasma TNF-alpha levels by enzyme-linked immunosorbent assay (ELISA), (2) the effect of recombinant human TNF-alpha for its possible antiviral effect in vivo, and (3) the effect of anti-murine TNF-alpha monoclonal antibody (mAb) in vivo. Four-week-old DBA/2 mice were inoculated intraperitoneally with EMCV (day 0). Mice were injected intravenously daily with 1 mu g of TNF-alpha or 2x10(3) units of anti-TNF-alpha mAb starting on day -1, day 0, or day 1 until day 2 (TNF-alpha study) or day 4 (anti-TNF-alpha mAb study). A portion of the mice were killed on day 5 (protocol 1); their hearts were removed, and plaque assays were performed to demonstrate the myocardial virus content. The remaining mice were killed on day 14 (protocol 2); myocardial lesions were examined histopathologically in terms of severity, and their survival rates were determined. Plasma TNF-alpha concentration was elevated in the blood of infected mice compared with uninfected mice 3, 5, and 7 days after virus inoculation. The myocardial virus content was higher in the TNF-alpha-treated group than in the control group. Histopathological analysis revealed that myocardial necrosis and cellular infiltration were more prominent in the TNF-alpha group than in the control group. The anti-TNF-alpha mAb improved survival and myocardial lesions when its treatment was started 1 day before virus inoculation. However, it showed no therapeutic effect when administered simultaneously with the inoculation or on day 1. Conclusions TNF-alpha may play an important role in the very early stage of the immune response, and anti-TNF-alpha mAb may prevent the early pathway of acute viral myocarditis.

引用

页码：846 / 851

页数：6

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