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Open Access Green möglich sobald Postprint bei der ZB eingereicht worden ist.
miR-21, miR-210, miR-34a, and miR-146a/b are up-regulated in human atherosclerotic plaques in the Tampere Vascular Study.
Atherosclerosis 219, 211-217 (2011)
OBJECTIVE: MicroRNAs are small non-coding RNAs that inversely regulate their target gene expression. The whole miRNA profile of human atherosclerotic plaques has not been studied previously. The aim of this study was to investigate the miRNA expression profile in human atherosclerotic plaques as compared to non-atherosclerotic left internal thoracic arteries (LITA), and to connect this expression to the processes in atherosclerosis. METHODS: The miRNA expression profiles of six LITAs and 12 atherosclerotic plaques obtained from aortic, carotid, and femoral atherosclerotic arteries from Tampere Vascular Study were analyzed. The analyses were performed with Agilent's miRNA Microarray. The expression levels of over 4-fold up-regulated miRNAs were verified with qRT-PCR from a larger population (n=50). Messenger RNA levels were analyzed with Illumina's Expression BeadChip to study miRNA target expression. RESULTS: Ten miRNAs were found to be differently expressed in atherosclerotic plaques when compared to controls (p<0.05). The expression of miR-21, -34a, -146a, -146b-5p, and -210 was verified and found to be significantly up-regulated in atherosclerotic arteries versus LITAs (p<0.001, fold changes 4.61, 2.55, 2.87, 2.82, and 3.92, respectively). Several predicted targets of these miRNAs were down-regulated, and gene set enrichment analysis showed several pathways which could be differently expressed due to this miRNA profile. CONCLUSIONS: The microRNA expression profile differs significantly between atherosclerotic plaques and control arteries. The most up-regulated miRNAs are involved in processes known to be connected to atherosclerosis. Interfering with the miRNA expression in the artery wall is a potential way to affect atherosclerotic plaque and cardiovascular disease development.
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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
Schlagwörter
miRNA; Atherosclerosis; Expression; Target; Plaque
ISSN (print) / ISBN
0021-9150
e-ISSN
1879-1484
Zeitschrift
Atherosclerosis
Quellenangaben
Band: 219,
Heft: 1,
Seiten: 211-217
Verlag
Elsevier
Verlagsort
Amsterdam
Begutachtungsstatus
Peer reviewed
Institut(e)
Research Unit Molecular Epidemiology (AME)