Abstract
Emerging evidence suggests that long non-coding RNAs (lncRNAs) represent a cellular hub coordinating various cellular processes that are critical in health and disease. Mechanical stress triggers changes in vascular smooth muscle cells (VSMCs) that in turn contribute to pathophysiological changes within the vasculature. We sought to evaluate the role that lncRNAs play in mechanical stretch-induced alterations of human aortic smooth muscle cells (HASMCs). RNA (lncRNA and mRNA) samples isolated from HASMCs that had been subjected to 10 or 20% elongation (1 Hz) for 24 h were profiled with the Arraystar Human LncRNA Microarray V3.0. LncRNA expression was quantified in parallel via qRT-PCR. Of the 30,586 human lncRNAs screened, 580 were differentially expressed (DE, P < 0.05) in stretched HASMCs. Amongst the 26,109 protein-coding transcripts evaluated, 25 of those DE were associated with 25 of the aforementioned DE lncRNAs (P < 0.05). Subsequent Kyoto Encyclopedia of Genes and Genomes analysis revealed that the DE mRNAs were largely associated with the tumor necrosis factor signaling pathway and inflammation. Gene Ontology analysis indicated that the DE mRNAs were associated with cell differentiation, stress response, and response to external stimuli. We describe the first transcriptome profile of stretch-induced changes in HASMCs and provide novel insights into the regulatory switches that may be fundamental in governing aberrant VSMC remodeling.
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Abbreviations
- AVIC:
-
Aortic valve interstitial cell
- CAD:
-
Coronary artery disease
- cDNA:
-
Complementary DNA
- CHRF:
-
Cardiac hypertrophy-related factor
- DE:
-
Differentially expressed
- EC:
-
Endothelial cell
- ECM:
-
Extracellular matrix
- FBN-1:
-
Fibrillin-1
- FBSS:
-
Fetal bovine serum
- GO:
-
Gene ontology
- HASMC:
-
Human aortic smooth muscle cell
- KEGG:
-
Kyoto Encyclopedia of Genes and Genomes
- lncRNA:
-
Long non-coding RNA
- Mhrt:
-
Myosin heavy chain-associated RNA transcripts
- ncRNA:
-
Non-coding RNA
- PAD:
-
Peripheral artery disease
- qRT-PCR:
-
Quantitative real-time PCR
- RA:
-
Rheumatoid arthritis
- TNF:
-
Tumor necrosis factor
- VSMC:
-
Vascular smooth muscle cell
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Acknowledgements
This work was supported by in part by a grant from the Heart and Stroke Foundation of Canada to S. Verma. L. E. Mantella was the recipient of a Canada Graduate Scholarships-Master’s (CGS M) Award and a University of Toronto Fellowship. S. Verma is the Canada Research Chair in Atherosclerosis at the University of Toronto.
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LEM, KKS, MA-O, RPJ, and SV designed the studies and the experiments. LEM, PS, CK, and AR conducted the experiments. LEM, AQ, and SM drafted the manuscript. LEM, KKS, NK, JEF, and SV analyzed and interpreted the data. All authors critically edited the manuscript, read and approved the final manuscript.
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Mantella, LE., Singh, K.K., Sandhu, P. et al. Fingerprint of long non-coding RNA regulated by cyclic mechanical stretch in human aortic smooth muscle cells: implications for hypertension. Mol Cell Biochem 435, 163–173 (2017). https://doi.org/10.1007/s11010-017-3065-2
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DOI: https://doi.org/10.1007/s11010-017-3065-2