Abstract
Eighteen month old spontaneously hypertensive rats (SHR-rats) showed myocardial dysfunction and autoantibodies directed against the β1-adrenoceptor similarly as known in human dilated cardiomyopathy or Chagas' disease. The agonist-like antibodies were able to activate the β1-adrenoceptor mediated signal transduction cascade in cultured rat cardiomyocytes and induced a long-lasting stimulatory effect resulting in a harmful adrenergic overdrive. The antibodies recognized an epitope of the second extracellular loop of the β1-adrenoceptor identical to that epitope identified in Chagas' disease. In conclusion, our assumption is supported that old SHR-rat are an useful animal model for investigating the role of anti-β1-adrenoceptor antibodies in the induction of human cardiomyopathy.
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Wallukat, G., Podlowski, S., Nissen, E. et al. Functional and structural characterization of anti-β1-adrenoceptor autoantibodies of spontaneously hypertensive rats. Mol Cell Biochem 251, 67–75 (2003). https://doi.org/10.1023/A:1025469515963
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DOI: https://doi.org/10.1023/A:1025469515963