Key result
Screening of 140 kinase inhibitors using a novel machine learning method identified PI3Kα, mTOR, and IGF1R as key kinases mediating cardiotoxicity in cultured neonatal cardiomyocytes.
Why the study?
Small molecule kinase inhibitors used to treat cancer can cause cardiotoxicity, creating an unmet need for methods to predict this toxicity.
A novel computational method combining toxicity screening and kinase profiling identified PI3Kα, mTOR, and IGF1R as crucial for cardiomyocyte viability, offering a potential tool to predict kinase inhibitor cardiotoxicity.
May aid kinase inhibitor cardiotoxicity prediction; hypothesis-generating in animal models, human validation needed.
Background Small molecule kinase inhibitors (KIs) are a class of agents currently used for treatment of various cancers. Unfortunately, treatment of cancer patients with some of the KIs is associated with cardiotoxicity, and there is an unmet need for methods to predict their cardiotoxicity. Here, we utilized a novel computational method to identify protein kinases crucial for cardiomyocyte viability. Methods and Results One hundred forty KIs were screened for their toxicity in cultured neonatal cardiomyocytes. The kinase targets of KIs were determined based on integrated data from binding assays. The key kinases mediating the toxicity of KIs to cardiomyocytes were identified by using a novel machine learning method for target deconvolution that combines the information from the toxicity screen and from the kinase profiling assays. The top kinases identified by the model were phosphoinositide 3-kinase catalytic subunit alpha, mammalian target of rapamycin, and insulin-like growth factor 1 receptor. Knockdown of the individual kinases in cardiomyocytes confirmed their role in regulating cardiomyocyte viability. Conclusions Combining the data from analysis of KI toxicity on cardiomyocytes and KI target profiling provides a novel method to predict cardiomyocyte toxicity of KIs.
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Elmadani et al. (2019) studied Cardiotoxicity. Small molecule kinase inhibitors was evaluated on Cardiomyocyte viability and toxicity. Screening of 140 kinase inhibitors using a novel machine learning method identified PI3Kα, mTOR, and IGF1R as key kinases mediating cardiotoxicity in cultured neonatal cardiomyocytes.
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