Autoantibodies against ADP/ATP carrier from patients with dilated cardiomyopathy increase activity of voltage-dependent Ca channels in isolated cardiac myocytes.
Blood Press Suppl
; 3: 41-4, 1996.
Article
in En
| MEDLINE
| ID: mdl-8973768
ABSTRACT
The effects of autoantibodies against the ADP/ATP carrier, from sera of patients with dilated cardiomyopathy, on calcium channel current (ICa) were studied in enzymatically-isolated guinea pig ventricular myocytes by using a whole cell patch-clamp method. The results showed that the autoantibodies enhanced ICa in a concentration-dependent manner. Verapamil inhibited enhancement of ICa induced by the autoantibodies. Control sera (without the autoantibodies) did not affect ICa. This study suggests that anti-ADP/ATP carrier autoantibodies from sera of patients with dilated cardiomyopathy may enhance ICa and cause calcium overload. Disturbing Ca-channel gating by autoantibodies may contribute to the pathogenesis of dilated cardiomyopathy.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Autoantibodies
/
Mitochondrial ADP, ATP Translocases
/
Cardiomyopathy, Dilated
/
Calcium Channels
/
Myocardium
Limits:
Animals
Language:
En
Journal:
Blood Press Suppl
Journal subject:
ANGIOLOGIA
Year:
1996
Document type:
Article
Affiliation country: