Abstract |
Acute ischemic stroke (AIS) is a major public health problem in China. Impaired angiogenesis plays crucial roles in the development of ischemic cerebral injury. Recent studies have identified that microRNAs ( miRNAs) are important regulators of angiogenesis, but little is known the exact effects of angiogenesis-associated miRNAs in AIS. In the present study, we detected the expression levels of angiogenesis-associated miRNAs in AIS patients, middle cerebral artery occlusion (MCAO) rats, and oxygen- glucose deprivation/reoxygenation (OGD/R) human umbilical vein endothelial cells (HUVECs). MiR-191 was increased in the plasma of AIS patients, OGD/R HUVECs, and the plasma and brain of MCAO rats. Over-expression of miR-191 promoted apoptosis, but reduced the proliferation, migration, tube-forming and spheroid sprouting activity in HUVECs OGD/R model. Mechanically, vascular endothelial zinc finger 1 (VEZF1) was identified as the direct target of miR-191, and could be regulated by miR-191 at post-translational level. In vivo studies applying miR-191 antagomir demonstrated that inhibition of miR-191 reduced infarction volume in MCAO rats. In conclusion, our data reveal a novel role of miR-191 in promoting ischemic brain injury through inhibiting angiogenesis via targeting VEZF1. Therefore, miR-191 may serve as a biomarker or a therapeutic target for AIS.
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Authors | Kang Du, Can Zhao, Li Wang, Yue Wang, Kang-Zhen Zhang, Xi-Yu Shen, Hui-Xian Sun, Wei Gao, Xiang Lu |
Journal | Aging
(Aging (Albany NY))
Vol. 11
Issue 9
Pg. 2762-2786
(05 07 2019)
ISSN: 1945-4589 [Electronic] United States |
PMID | 31064890
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Biomarkers
- DNA-Binding Proteins
- MIRN191 microRNA, human
- MicroRNAs
- Transcription Factors
- VEZF1 protein, human
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Topics |
- Aged
- Animals
- Biomarkers
- Brain Ischemia
(metabolism, pathology)
- DNA-Binding Proteins
(metabolism)
- Female
- Gene Expression Regulation
(drug effects)
- Human Umbilical Vein Endothelial Cells
- Humans
- Infarction, Middle Cerebral Artery
- Male
- MicroRNAs
(antagonists & inhibitors, genetics, metabolism)
- Neovascularization, Physiologic
(physiology)
- Rats
- Rats, Sprague-Dawley
- Signal Transduction
- Spheroids, Cellular
- Stroke
(metabolism, pathology)
- Transcription Factors
(metabolism)
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