iScience (May 2023)

Large-scale microRNA functional high-throughput screening identifies miR-515-3p and miR-519e-3p as inducers of human cardiomyocyte proliferation

  • Harsha V. Renikunta,
  • Katina Lazarow,
  • Yiqi Gong,
  • Praphulla Chandra Shukla,
  • Vanasa Nageswaran,
  • Hector Giral,
  • Adelheid Kratzer,
  • Lennart Opitz,
  • Felix B. Engel,
  • Arash Haghikia,
  • Sarah Costantino,
  • Francesco Paneni,
  • Jens Peter von Kries,
  • Katrin Streckfuss-Bömeke,
  • Ulf Landmesser,
  • Philipp Jakob

Journal volume & issue
Vol. 26, no. 5
p. 106593

Abstract

Read online

Summary: Ischemic cardiomyopathy, driven by loss of cardiomyocytes and inadequate proliferative response, persists to be a major global health problem. Using a functional high-throughput screening, we assessed differential proliferative potential of 2019 miRNAs after transient hypoxia by transfecting both miR-inhibitor and miR-mimic libraries in human iPSC-CM. Whereas miR-inhibitors failed to enhance EdU uptake, overexpression of 28 miRNAs substantially induced proliferative activity in hiPSC-CM, with an overrepresentation of miRNAs belonging to the primate-specific C19MC-cluster. Two of these miRNAs, miR-515-3p and miR-519e-3p, increased markers of early and late mitosis, indicative of cell division, and substantially alter signaling pathways relevant for cardiomyocyte proliferation in hiPSC-CM.

Keywords