医学
无症状的
小RNA
病理
发病机制
颈动脉内膜切除术
颈动脉分叉
易损斑块
颈动脉
纤维帽
内科学
基因
生物
遗传学
作者
Ellen Caparosa,Andrew J. Sedgewick,Georgios A. Zenonos,Zhinan Yin,Diane L. Carlisle,Lucia Ştefăneanu,Brian T. Jankowitz,Paul A. Gardner,Yue‐Fang Chang,William R. Lariviere,William A. LaFramboise,Panayiotis V. Benos,Robert M. Friedlander
出处
期刊:Neurosurgery
[Oxford University Press]
日期:2018-10-17
卷期号:85 (2): E284-E293
被引量:14
标识
DOI:10.1093/neuros/nyy470
摘要
Abstract BACKGROUND Many studies have explored molecular markers of carotid plaque development and vulnerability to rupture, usually having examined whole carotid plaques. However, there are regional differences in plaque morphology and known shear-related mechanisms in areas surrounding the lipid core. OBJECTIVE To determine whether there are regional differences in protein expression along the long axis of the carotid plaque and how that might produce gaps in our understanding of the carotid plaque molecular signature. METHODS Levels of 7 inflammatory cytokines (IL-1β, IL-6, IL-8, IL-10, IL-12 p70, IFN-γ, and TNF-α) and caspase-3 were analyzed in prebifurcation, bifurcation, and postbifurcation segments of internal carotid plaques surgically removed from symptomatic and asymptomatic patients. Expression profiles of miRNAs and mRNAs were determined with microarrays for the rupture-prone postbifurcation segment for comparison with published whole plaque results. RESULTS Expression levels of all proteins examined, except IL-10, were lowest in the prebifurcation segment and significantly higher in the postbifurcation segment. Patient group differences in protein expression were observed for the prebifurcation segment; however, no significant differences were observed in the postbifurcation segment between symptomatic and asymptomatic patients. Expression profiles from postbifurcation carotid plaques identified 4 novel high priority miRNAs differentially expressed between patient groups (miR-214, miR-484, miR-942, and miR-1287) and 3 high-confidence miRNA:mRNA targets, including miR-214: APOD , miR-484: DACH1 , and miR-942: GPR56 . CONCLUSION The results demonstrate regional differences in protein expression for the first time and show that focus on the rupture-prone postbifurcation region leads to prioritization for further study of novel miRNA gene regulation mechanisms.
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