RNA sequence analysis of inducible pluripotent stem cell-derived cardiomyocytes reveals altered expression of DNA damage and cell cycle genes in response to doxorubicin

Toxicology and Applied Pharmacology
Monica E ReyesMichelle A T Hildebrandt

Abstract

Anthracyclines, such as doxorubicin, are highly effective chemotherapeutic agents, yet are associated with increased risk of cardiotoxicity. The genes and pathways involved in the development of heart damage following doxorubicin exposure in humans remain elusive. Our objective was to explore time- and dose-dependent changes in gene expression via RNA sequence (RNAseq) that mediate doxorubicin response in human iPSC-cardiomyocytes following 50, 150, or 450 nM exposure for 2, 7, or 12 days. Clustering and differential expression analyses were conducted to identify genes with altered expression. Samples clustered in dose and time-dependent manners, and MCM5, PRC1, NUSAP1, CENPF, CCNB1, MELK, AURKB, and RACGAP1 were consistently significantly differentially expressed between untreated and treated conditions. These genes were also significantly downregulated in pairwise analyses, which was validated by reverse transcription polymerase chain reaction (RT-PCR). Pathway analysis identified the top canonical pathways involved in response, implicating DNA damage repair response and the cell cycle as having roles in the development of doxorubicin-induced cardiotoxicity in the human cardiomyocyte.

Citations

Nov 22, 2018·Clinical Pharmacology and Therapeutics·Anne TripaydonisDavid A Elliott
Jan 29, 2019·Cardiovascular Research·Emily A PinheiroPaul W Burridge
Jun 25, 2019·Cell Death Discovery·K Melodi McSweeneyBaolin Zhang
Aug 17, 2020·Current Opinion in Pediatrics·Erika N ScottColin J D Ross
Apr 11, 2021·Communications Biology·Madeleine HartViji M Draviam
Jun 21, 2021·Experimental Gerontology·Alyssa N CavalierThomas J LaRocca

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