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GPR174 knockdown enhances blood flow recovery in hindlimb ischemia mice model by upregulating AREG expression
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GPR174 knockdown enhances blood flow recovery in hindlimb ischemia mice model by upregulating AREG expression
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GPR174 knockdown enhances blood flow recovery in hindlimb ischemia mice model by upregulating AREG expression
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Journal Article
GPR174 knockdown enhances blood flow recovery in hindlimb ischemia mice model by upregulating AREG expression
2022
Overview
Regulatory T cells (Tregs) are critically involved in neovascularization, an important compensatory mechanism in peripheral artery disease. The contribution of G protein coupled receptor 174 (GPR174), which is a regulator of Treg function and development, in neovascularization remains elusive. Here, we show that genetic deletion of GPR174 in Tregs potentiated blood flow recovery in mice after hindlimb ischemia. GPR174 deficiency upregulates amphiregulin (AREG) expression in Tregs, thereby enhancing endothelial cell functions and reducing pro-inflammatory macrophage polarization and endothelial cell apoptosis. Mechanically, GPR174 regulates AREG expression by inhibiting the nuclear accumulation of early growth response protein 1 (EGR1) via Gαs/cAMP/PKA signal pathway activation. Collectively, these findings demonstrate that GPR174 negatively regulates angiogenesis and vascular remodeling in response to ischemic injury and that GPR174 may be a potential molecular target for therapeutic interventions of ischemic vascular diseases.
Gpr174
is a regulator of regulatory T cells, which play an important role in angiogenesis after hindlimb ischemia. Here, the authors show GPR174-deficient Tregs promote AREG expression by inhibiting Gαs/cAMP/PKA signal pathway and increasing EGR1 nuclear accumulation to improve angiogenesis and vascular remodeling in response to ischemic injury.
