期刊
GENE THERAPY
卷 22, 期 12, 页码 1000-1006出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/gt.2015.59
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资金
- National Natural Science Foundation of China [81260042]
The programmed cell death 4/nuclear factor-kappa B/tumor necrosis factor a (PDCD4/NF-kappa B/TNF-alpha) signaling pathway has an important role in coronary microembolization (CME)-induced inflammation. microRNA-21 protects myocardium mainly via regulation of its target gene PDCD4. Therefore, in this study we investigated the effect of ultrasound-guided microbubblemediated microRNA-21 transfection on cardiac function in CME pig model and determined the potential mechanisms involved. The pig CME model was established by microcatheter-mediated injection of microembolization beads into the left anterior descending artery. The CME with microRNA transfection group was injected with plasmid-microbubble mixture through the marginal ear vein 4 days before CME treatment, along with ultrasound to the myocardium. Cardiac function indices were examined by cardiac ultrasound; infarct area was measured by hematoxylin-eosin and hematoxylin-basic Fuchsin-picric acid staining of tissue pathological sections; green fluorescent protein-labeled gene expression levels were evaluated by fluorescent microscopy in frozen sections; myocardial PDCD4 and TNF-alpha mRNA levels were measured by fluorescent quantitative PCR and protein levels were measured by western blotting; and NF-kappa B activity was tested by electrophoretic mobility shift assay. Compared with the CME group, the CME with ultrasound-mediated microRNA transfection group demonstrated improved CME-induced cardiac dysfunction (P<0.05). Compared with the CME group, the CME with ultrasound-mediated microRNA transfection group showed significantly lower PDCD4 expression and NF-kappa B activity (Po0.05). Ultrasound microbubblemediated microRNA-21 transfection effectively improved CME-induced cardiac dysfunction via inhibition of PDCD4/NF-kappa B/TNF-alpha signal transduction pathway.
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