Related Experiment Videos
Adenine nucleotide translocator in dilated cardiomyopathy: pathophysiological alterations in expression and function
1Department of Cardiology, Benjamin Franklin Hospital, Free University of Berlin, Germany.
Molecular and Cellular Biochemistry
|October 6, 1997
Summary
Dilated cardiomyopathy (DCM) impairs heart energy supply due to reduced adenine nucleotide translocator (ANT) function. This impacts ATP/ADP transport, leading to decreased heart function in DCM patients.
Area of Science:
- Cardiology
- Molecular Biology
- Biochemistry
Background:
- Dilated cardiomyopathy (DCM) is associated with impaired cardiac energy metabolism.
- The adenine nucleotide translocator (ANT) is crucial for cellular energy transport (ATP/ADP).
Purpose of the Study:
- To investigate the role of ANT function and expression in the pathogenesis of DCM.
- To explore the impact of viral and autoimmune factors on ANT function in DCM.
Main Methods:
- Analysis of ANT transport capacity and protein/transcript expression in human DCM hearts.
- Comparison with hearts from patients with ischemic or valvular heart disease.
- Infection of mice with Coxsackie B3 virus and immunization of guinea pigs with ANT to study effects on myocardial ANT function.
Main Results:
- Reduced ANT transport capacity and elevated total ANT protein (primarily ANT 1 isoform) in DCM hearts.
- Decreased ANT 2 transcripts observed in DCM.
- Viral infection (Coxsackie B3) and ANT immunization in animal models reduced ANT function, induced autoimmunity, and impaired cardiac energy metabolism.
Conclusions:
- Impaired ANT function is a disease-specific finding in DCM, contributing to energy supply deficits.
- Autoimmune reactions against ANT, potentially triggered by viral infections, play a role in DCM pathogenesis.
- Findings highlight ANT dysfunction as a key factor in DCM-related cardiac energy imbalance.