miR-1290 promotes IL-8-mediated vascular endothelial cell adhesion by targeting GSK-3β.

Background: MicroRNA-1290 (miR-1290) has been reported to be involved in many diseases and play a key role during the development process. However, the role of miR-1290 in atherosclerosis (AS) is still unclear.

Methods And Results: The current study showed that the expressions of miR-1290 were high in serum of patients with hyperlipidemia. The functional role of miR-1290 were then investigated in human umbilical vein endothelial cells (HUVECs). Here, we found that miR-1290 expressions were notably enhanced in HUVECs mediated by IL-8. miR-1290 inhibitor repressed monocytic THP-1 cells adhesion to HUVECs by regulating ICAM-1 and VCAM-1, inhibited proliferation through regulating cyclinD1 and PCNA, and inhibited inflammatory response by regulating IL-1β. Mechanistically, we verified that miR-1290 mimic was able to directly target the 3'-UTR of GSK-3β mRNA using luciferase reporter assay. Knockdown of GSK-3β (si-GSK-3β) promoted HUVECs adhesion and the expression of IL-1β, and partially restore the depression effect of miR-1290 inhibitor on HUVECs adhesion and inflammation. In contrast, si-GSK-3β inhibited the proliferation of HUVECs and the expression of cyclinD1 and PCNA.

Conclusions: In summary, our study revealed that miR-1290 promotes IL-8-mediated the adhesion of HUVECs by targeting GSK-3β. However, GSK-3β is not the target protein for miR-1290 to regulate the proliferation of HUVECs. Our findings may provide potential target in atherosclerosis treatment.