Abstract:
:Cardiac microvascular endothelial cells (CMVECs) are the most numerous cells in the myocardium and orchestrate cardiogenesis during development, regulate adult cardiac function, and modulate pathophysiology of heart failure. It has been shown that the transcriptome of CMVECs differs from other endothelial cell types, but transcriptomic changes in cardiac endothelial cells during cardiac maturation and cardiac remodeling have not been studied. CMVECs were isolated from rat hearts based on CD31 expression and were immediately processed for RNA sequencing. We compared gene expression levels from primary CMVECs of neonatal hearts, normal adult hearts, and infarcted hearts. Between neonatal and adult CMVECs, 6,838 genes were differentially expressed, indicating that CMVECs undergo a substantial transformation during postnatal cardiac growth. A large fraction of genes upregulated in neonatal CMVECs are part of mitosis pathways, whereas a large fraction of genes upregulated in adult CMVECs are part of cellular response, secretory, signaling, and cell adhesion pathways. Between CMVECs of normal adult hearts and infarcted hearts, 159 genes were differentially expressed. We found a limited degree of overlap (55 genes) between the differentially expressed genes in neonatal and infarcted-hearts. Of 46 significantly upregulated genes in the infarcted heart, 46% were also upregulated in neonatal hearts relative to sham. Of 113 significantly downregulated genes in the infarcted-hearts, 30% were also downregulated in neonatal hearts relative to sham. These data demonstrate that CMVECs undergo dramatic changes from neonatal to adult and more subtle changes between normal state and cardiac remodeling.
journal_name
Physiol Genomicsjournal_title
Physiological genomicsauthors
Vermeulen Z,Mateiu L,Dugaucquier L,De Keulenaer GW,Segers VFMdoi
10.1152/physiolgenomics.00002.2019subject
Has Abstractpub_date
2019-06-01 00:00:00pages
186-196issue
6eissn
1094-8341issn
1531-2267journal_volume
51pub_type
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