OGR1 mediates the inhibitory effects of acidic environment on proliferation and angiogenesis of endothelial progenitor cells.

This study attempted to whether OGR1 mediates the effects of acid on proliferation, migration, and angiogenesis in EPCs. FITC-UEA-I and Dil-Ac-LDL double-staining methods were used to identify EPCs. Expression of OGR1 was analyzed by RT-PCR and western blot after incubation in media ranging in pH, cell counting kit-8 and cell cycle analysis were used to analyze proliferation and cell cycle distribution. Scratch test, transwell migration assay, and tube formation experiments were performed to analyze migration and vascularization of EPCs after silencing OGR1 with siRNA. The result show EPCs were positive for FITC-UEA-I and Dil-Ac-LDL double-staining, and expressed OGR1. Expression of OGR1 increased gradually with decreased pH, and was highest in pH 6.4 medium. Incubation in pH 6.4 medium inhibited proliferation of EPCs and caused cell cycle arrest. Silencing of OGR1 using siRNA partially reversed the effect of acidic environment on EPCs. Migration and angiogenesis of EPCs were inhibited in pH 6.4 medium, and silencing of OGR1 partially reversed this effect. The results demonstrated expression of OGR1 in EPCs, and the OGR1 mediated the effects of acidic environment on proliferation, migration, and angiogenesis of EPCs. This article is protected by copyright. All rights reserved. PMID: 31115941 [PubMed - as supplied by publisher]
Source: Cell Biology International - Category: Cytology Authors: Tags: Cell Biol Int Source Type: research