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Trastuzumab cardiotoxicity: Speculations regarding pathophysiology and targets for further study

Item Type:Review
Title:Trastuzumab cardiotoxicity: Speculations regarding pathophysiology and targets for further study
Creators Name:Schneider, J.W. and Chang, A.Y. and Garratt, A.
Abstract:Trastuzumab, a monoclonal antibody that is selective for cells that overexpress the erbB2 receptor protein tyrosine kinase, is a promising targeted therapy for the treatment of breast cancer. Surprisingly, toxic cardiovascular side effects were discovered in late-phase clinical trials, and these effects were most prominent when trastuzumab was combined with anthracycline chemotherapy. We review recent data focusing on how erbB2 monoclonal antibodies could exert a cardiotoxic effect through unique cardiomyocyte cell surface and intracellular structural features, and how an individual's cardiac susceptibility to erbB2 monoclonal antibodies may be dictated by the ability of erbB2 monoclonal antibodies to bind cardiomyocytes. In addition, we discuss ways that anthracyclines may also affect erbB2/erbB4/neuregulin receptor signaling, explaining the apparent synergistic effect. Further investigation of the role of normal and aberrant erbB2 signaling in the development of cardiac dysfunction could lead to an improved understanding of the pathophysiology of cardiac dysfunction and may lead to novel therapies for the treatment of heart failure, regardless of etiology. Understanding the nature and specificity of trastuzumab's cardiotoxic effects is important in better defining clinical criteria for inclusion and exclusion of patients who can safely receive trastuzumab for the treatment of breast cancer, or possibly other malignancies.
Keywords:Catecholamines, Heart Failure, Molecular Biology, Prognosis, Recurrence, Risk Assessment, Severity of Illness Index, Sympathetic Nervous System, Ventricular Tachycardia
Source:Seminars in Oncology
Page Range:22-28
Date:June 2002
Official Publication:https://doi.org/10.1016/S0093-7754(02)70123-1
PubMed:View item in PubMed

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