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Article

Novel Identified Circular Transcript of RCAN2, circ-RCAN2, Shows Deviated Expression Pattern in Pig Reperfused Infarcted Myocardium and Hypoxic Porcine Cardiac Progenitor Cells In Vitro

1
Department of Internal Medicine II, Division of Cardiology, Medical University of Vienna, 1090 Vienna, Austria
2
Institute of Information Systems Engineering, Research Unit of Information and Software Engineering, Vienna University of Technology, 1040 Vienna, Austria
*
Author to whom correspondence should be addressed.
Academic Editors: Ioanna Andreadou and Derek Hausenloy
Int. J. Mol. Sci. 2021, 22(3), 1390; https://doi.org/10.3390/ijms22031390
Received: 23 December 2020 / Revised: 27 January 2021 / Accepted: 28 January 2021 / Published: 30 January 2021
Circular RNAs (circRNAs) are crucial in gene regulatory networks and disease development, yet circRNA expression in myocardial infarction (MI) is poorly understood. Here, we harvested myocardium samples from domestic pigs 3 days after closed-chest reperfused MI or sham surgery. Cardiac circRNAs were identified by RNA-sequencing of rRNA-depleted RNA from infarcted and healthy myocardium tissue samples. Bioinformatics analysis was performed using the CIRIfull and KNIFE algorithms, and circRNAs identified with both algorithms were subjected to differential expression (DE) analysis and validation by qPCR. Circ-RCAN2 and circ-C12orf29 expressions were significantly downregulated in infarcted tissue compared to healthy pig heart. Sanger sequencing was performed to identify the backsplice junctions of circular transcripts. Finally, we compared the expressions of circ-C12orf29 and circ-RCAN2 between porcine cardiac progenitor cells (pCPCs) that were incubated in a hypoxia chamber for different time periods versus normoxic pCPCs. Circ-C12orf29 did not show significant DE in vitro, whereas circ-RCAN2 exhibited significant ischemia-time-dependent upregulation in hypoxic pCPCs. Overall, our results revealed novel cardiac circRNAs with DE patterns in pCPCs, and in infarcted and healthy myocardium. Circ-RCAN2 exhibited differential regulation by myocardial infarction in vivo and by hypoxia in vitro. These results will improve our understanding of circRNA regulation during acute MI. View Full-Text
Keywords: circRNA; circ-RCAN2; AMI; porcine model of myocardial infarction; pCPCs circRNA; circ-RCAN2; AMI; porcine model of myocardial infarction; pCPCs
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MDPI and ACS Style

Mester-Tonczar, J.; Einzinger, P.; Winkler, J.; Kastner, N.; Spannbauer, A.; Zlabinger, K.; Traxler, D.; Lukovic, D.; Hasimbegovic, E.; Goliasch, G.; Pavo, N.; Gyöngyösi, M. Novel Identified Circular Transcript of RCAN2, circ-RCAN2, Shows Deviated Expression Pattern in Pig Reperfused Infarcted Myocardium and Hypoxic Porcine Cardiac Progenitor Cells In Vitro. Int. J. Mol. Sci. 2021, 22, 1390. https://doi.org/10.3390/ijms22031390

AMA Style

Mester-Tonczar J, Einzinger P, Winkler J, Kastner N, Spannbauer A, Zlabinger K, Traxler D, Lukovic D, Hasimbegovic E, Goliasch G, Pavo N, Gyöngyösi M. Novel Identified Circular Transcript of RCAN2, circ-RCAN2, Shows Deviated Expression Pattern in Pig Reperfused Infarcted Myocardium and Hypoxic Porcine Cardiac Progenitor Cells In Vitro. International Journal of Molecular Sciences. 2021; 22(3):1390. https://doi.org/10.3390/ijms22031390

Chicago/Turabian Style

Mester-Tonczar, Julia, Patrick Einzinger, Johannes Winkler, Nina Kastner, Andreas Spannbauer, Katrin Zlabinger, Denise Traxler, Dominika Lukovic, Ena Hasimbegovic, Georg Goliasch, Noemi Pavo, and Mariann Gyöngyösi. 2021. "Novel Identified Circular Transcript of RCAN2, circ-RCAN2, Shows Deviated Expression Pattern in Pig Reperfused Infarcted Myocardium and Hypoxic Porcine Cardiac Progenitor Cells In Vitro" International Journal of Molecular Sciences 22, no. 3: 1390. https://doi.org/10.3390/ijms22031390

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