Abstract
Macrophages play an important role in the pathogenesis of proliferative vitreoretinopathy (PVR). M2 macrophages can promote tissue remodeling and repair. In this study, CD206 positive M2 type macrophages were found in preretinal fibrous membranes of the mouse model of PVR induced by the intravitreal injection of retinal pigment epithelial (RPE) cells. Notch signaling determines M2 macrophage polarization. The specific inhibition of Notch signaling pathway by the intravitreal injection of γ-secretase inhibitor DAPT attenuated RPE cells-induced PVR formation as demonstrated by the decreased expression of α-SMA, and inhibited M2 type macrophage infiltation as demonstrated by the decreased expression of Arg-1. Notch signaling may modulate PVR formation by regulating M2 type macrophage polarization.
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