Potential role of microRNA-181b on atherosclerosis / 中华心血管病杂志
Chinese Journal of Cardiology
;
(12): 516-520, 2015.
Article
in Chinese
| WPRIM
| ID: wpr-328745
ABSTRACT
<p><b>OBJECTIVE</b>To observe the serum expression of miR-181b in atherosclerotic patients and the in vitro effects of miR-181b on vascular smooth muscle cell growth and migration.</p><p><b>METHODS</b>Fifty patients (mean age (78.1 ± 8.9) years old) with carotid ultrasound examination evidenced atherosclerotic plaque were enrolled as the atherosclerosis group and 50 healthy (mean age (72.5 ± 10.7) years old) subjects serve as control group. Stem-loop real time RT-PCR was used to detect the serum expression of miR-181b. Importin-α3 was predicted to be a direct target of miR-181b by Targetscan and Pictar. Western-blot was employed to detect the in vitro effects of miR-181b on the expression of Importin-α3 in endothelial cells. Luciferase reporter assay was employed to testify the prediction. The effects of miR-181b on vascular smooth muscle cell growth, migration abilities were respectively examined by CCK8 assay and Matrigel migration assay.</p><p><b>RESULTS</b>Compared with healthy controls, serum expression of miR-181b was significantly down-regulated in patients with atherosclerosis (31.69 ± 0.96 vs. 82.28 ± 5.95, P < 0.05); Importin-α3 was predicted and proved to be a direct target of miR-181b by Western-blot and luciferase reporter assay. The proliferation and migration of vascular smooth muscle cell were significantly downregulated by forced expression of miR-181b (1.57 ± 0.18 vs. 2.66 ± 0.16, P < 0.05; 8.7 ± 1.1 vs. 21.4 ± 2.3, P < 0.05), while these effects could be abolished by inhibition of miR-181b (2.88 ± 0.09 vs. 2.04 ± 0.11, P < 0.05; 15.2 ± 1.5 vs. 8.4 ± 1.3, P < 0.05).</p><p><b>CONCLUSION</b>The serum miR-181b level was significantly reduced in patients with atherosclerosis. miR-181b may function as an atherosclerosis suppressor by interupting the NF-κB pathway in endothelial cells and inhibiting the proliferation and migration of vascular smooth muscle cells.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Down-Regulation
/
Cell Cycle
/
NF-kappa B
/
MicroRNAs
/
Endothelial Cells
/
Cell Proliferation
/
Atherosclerosis
/
Muscle, Smooth, Vascular
Type of study:
Prognostic study
Limits:
Aged
/
Aged80
/
Humans
Language:
Chinese
Journal:
Chinese Journal of Cardiology
Year:
2015
Type:
Article
Similar
MEDLINE
...
LILACS
LIS