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Transcriptional sex and regional differences in paired human atrial and ventricular cardiac biopsies collected in vivo
University of Skövde, School of Bioscience. University of Skövde, Systems Biology Research Environment. (Translationell bioinformatik, Translational Bioinformatics)ORCID iD: 0000-0003-4697-0590
Department of Laboratory Medicine, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Sweden.
SciCross AB, Sweden.ORCID iD: 0000-0002-4613-2952
Department of Laboratory Medicine, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Sweden.
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2020 (English)In: Physiological Genomics, ISSN 1094-8341, E-ISSN 1531-2267, Vol. 52, no 2, p. 110-120Article in journal (Refereed) Published
Abstract [en]

Transcriptional studies of the human heart provide insight into physiological and pathophysiological mechanisms, essential for understanding the fundamental mechanisms of normal cardiac function and how they are altered by disease. To improve the understanding of why men and women may respond differently to the same therapeutic treatment it is crucial to learn more about sex-specific transcriptional differences. In this study the transcriptome of right atrium and left ventricle was compared across sex and regional location. Paired biopsies from five male and five female patients undergoing aortic valve replacement or coronary artery bypass grafting were included. Gene expression analysis identified 620 differentially expressed transcripts in atrial and ventricular tissue in men and 471 differentially expressed transcripts in women. In total 339 of these transcripts overlapped across sex but notably, 281 were unique in the male tissue and 162 in the female tissue, displaying marked sex differences in the transcriptional machinery. The transcriptional activity was significantly higher in atrias than in ventricles as 70% of the differentially expressed genes were upregulated in the atrial tissue. Furthermore, pathway- and functional annotation analyses performed on the differentially expressed genes showed enrichment for a more heterogeneous composition of biological processes in atrial compared with the ventricular tissue, and a dominance of differentially expressed genes associated with infection disease was observed. The results reported here provide increased insights about transcriptional differences between the cardiac atrium and ventricle but also reveal transcriptional differences in the human heart that can be attributed to sex.

Place, publisher, year, edition, pages
American Physiological Society , 2020. Vol. 52, no 2, p. 110-120
Keywords [en]
cardiac tissue, differentially expressed genes, gender, gene expression, left ventricle, microarray, right atrium, sex, transcription
National Category
Medical Genetics Biochemistry and Molecular Biology Genetics
Research subject
Bioinformatics
Identifiers
URN: urn:nbn:se:his:diva-18213DOI: 10.1152/physiolgenomics.00036.2019ISI: 000514831200004PubMedID: 31869284Scopus ID: 2-s2.0-85079250310OAI: oai:DiVA.org:his-18213DiVA, id: diva2:1395030
Available from: 2020-02-20 Created: 2020-02-20 Last updated: 2020-03-13Bibliographically approved

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Synnergren, JaneDönnes, Pierre

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