© 2007 European Society of Cardiology
Prognostic role of myocardial tumor necrosis factor-alpha and terminal complement complex expression in patients with dilated cardiomyopathy
a Department of Internal Medicine II–Cardiology, University of Ulm Robert-Koch-Str. 8, 89081 Ulm, Germany
b Center for Cell and Gene Therapy and Department of Molecular and Cellular Biology, Baylor College of Medicine Houston, TX 77030, USA
c Department of Internal Medicine II Klinikum Bayreuth, 95445 Bayreuth, Germany
* Corresponding author. Tel.: +49 731 500 0; fax: +49 731 500 24442. E-mail address: oliver.zimmermann{at}medizin.uni-ulm.de
| Abstract |
|---|
Background: In patients with dilated cardiomyopathy (DCM), elevated plasma levels of tumor necrosis factor-
(TNF-
) are associated with poor prognosis. The terminal complement complex (C5b-9) stimulates myocardial TNF-
expression.
Aims: To investigate whether myocardial TNF-
and C5b-9 expression correlate with clinical outcome in DCM.
Methods and results: 71 patients with DCM underwent myocardial biopsy. Biopsies were analyzed for TNF-
, C5b-9, markers of inflammation and for viral genome. Patients were divided into three groups according to biopsy results: group A: no TNF-
and no C5b-9; group B: TNF-
or C5b-9; and group C: TNF-
and C5b-9. NYHA classification, ECG and echocardiography were documented. Patients received conventional treatment of heart failure and, in a few cases, additional treatment with interferon β1b (virus positive) or prednisolone (inflammatory DCM).
There were 13 patients (18%) in group A, 19 patients (27%) in group B, and 39 patients (55%) in group C. All groups had a similar and significant improvement in NYHA classification and echocardiographic parameters. TNF-
and C5b-9 did not significantly correlate with the presence of viral genome or with markers of inflammation.
Conclusion: TNF-
and C5b-9 are widely distributed in the myocardium of DCM patients. Neither of the antigens correlates with clinical outcome. Myocardial TNF-
may not be a useful prognostic marker in DCM.
Key Words: Dilated cardiomyopathy Biopsy Heart failure TNF-
Terminal complement complex
Received September 8, 2005; Revised February 2, 2006; Accepted April 3, 2006