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3 protocols using quinidine

1

Cardiotoxicity Screening using iPSC-CMs

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Cisapride monohydrate and quinine were obtained from Sigma Aldrich (Saint Louis, MO). Verapamil hydrochloride was obtained from MP Biomedicals (Solon, OH). Quinidine was obtained from Tocris (Bristol, UK). Frozen stocks of human iPSC-CMs from a healthy individual (SCVI-480CM) were obtained from Joseph C. Wu, MD, PhD at the Stanford Cardiovascular Institute Biobank. The iPSC-CM line was derived from an African American female donor, and was approved by Stanford University Human Subjects Research Institutional Review Board. The cells were differentiated to cardiomyocytes as described previously (Churko et al., 2013 (link); Burridge et al., 2014 (link)). HEK-HCN1 (CT6114) cells were obtained from Charles River (Wilmington, MA).
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2

Cardiac Ion Channel Pharmacology Assay

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Bay K 8644, veratridine, terfenadine, cisapride, anti-cTnT (1:400) antibody, E-4031 and verapamil were purchased from Abcam (Cambridge, MA, USA). Quinidine was from Tocris Bioscience (Bristol, UK). Nifedipine, 4-aminopyridine, fetal bovine serum (FBS), cytosine β-D-arabinofuranoside (ARA-C), poly-D-lysine and epinephrine, FLA-365, ryanodine, lamotrigine, carbamazepine, phenytoin and all inorganic salts were purchased from Sigma-Aldrich (St. Louis, MO, USA). Bovine serum albumin, DMEM/F12, Triton™ X-100, Alexa Fluor® 488-conjugated goat anti-rabbit were from ThermoFisher Scientific (Waltham, MA). The Ca2+ dye Fluo-8/AM was from TEFLab (Austin, TX, USA).
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3

Pharmacological Evaluation of Human iPSC-Cardiomyocytes

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Cisapride monohydrate and quinine were obtained from Sigma Aldrich (Saint Louis, MO). Verapamil hydrochloride was obtained from MP Biomedicals (Solon, OH). Quinidine was obtained from Tocris (Bristol, UK). Frozen stocks of human iPSC‐CMs from a healthy individual (SCVI‐480CM) were obtained from Joseph C. Wu, MD, PhD, at the Stanford Cardiovascular Institute Biobank. The iPSC‐CM line was derived from an African‐American female donor and was approved by Stanford University Human Subjects Research Institutional Review Board. The cells were differentiated to cardiomyocytes as described previously (Burridge et al., 2014 (link); Churko et al., 2013 (link)). HEK‐HCN1 (CT6114) cells were obtained from Charles River (Wilmington, MA).
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