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Genotypic and serotypic profile in dilated cardiomyopathy
L Wesslén1, A Waldenström, B Lindblom
1Department of Infectious Diseases, University Hospital, Uppsala, Sweden.
Scandinavian Journal of Infectious Diseases. Supplementum
|January 1, 1993
Summary
Dilated cardiomyopathy (DCM) may be linked to Coxsackie B virus infections and specific human leukocyte antigen (HLA) genotypes. This study suggests a dual dependence of host genotype and virus serotype in DCM pathogenesis.
Area of Science:
- Cardiology
- Virology
- Immunogenetics
Background:
- Dilated cardiomyopathy (DCM) is a complex heart condition with unclear etiology.
- Viral infections, particularly Coxsackie B viruses, are suspected contributors to DCM.
- Genetic predisposition may play a role in DCM development.
Purpose of the Study:
- To investigate the potential role of Coxsackie B virus serology and human leukocyte antigen (HLA) genotypes in the pathogenesis of DCM.
- To explore the relationship between viral infections, host genetics, and DCM development.
Main Methods:
- Enrolled 18 patients diagnosed with DCM.
- Conducted conventional clinical investigations, including imaging and biopsy.
- Performed serological tests for Coxsackie B viruses and DNA-based tissue typing for HLA genotypes (DQB1).
Main Results:
- High IgM titers against Coxsackie viruses were found in 6/8 patients with idiopathic DCM.
- A significant association was observed between DCM and the HLA-DQB1:4 genotype (6/12 patients vs. 17% controls).
- The HLA-DQB1:2 genotype showed a protective effect, occurring in only 1/12 DCM patients versus 19% in controls.
Conclusions:
- The findings support a dual dependence of host genotype and virus serotype in DCM pathogenesis, aligning with the Doherty-Zinkernagel hypothesis.
- Suggests a virus-immune hypothesis for the enigmatic pathogenesis of DCM.
- Highlights the potential protective role of the HLA-DQB1:2 genotype in DCM.