N-CAM exhibits a regulatory function in pathological angiogenesis in oxygen induced retinopathy |
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Authors: | Håkansson Joakim Ståhlberg Anders Wolfhagen Sand Fredrik Gerhardt Holger Semb Henrik |
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Institution: | Department of Medical Biochemistry, Sahlgrenska Academy at Gothenburg University, G?teborg, Sweden. |
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Abstract: | BackgroundDiabetic retinopathy and retinopathy of prematurity are diseases caused by pathological angiogenesis in the retina as a consequence of local hypoxia. The underlying mechanism for epiretinal neovascularization (tuft formation), which contributes to blindness, has yet to be identified. Neural cell adhesion molecule (N-CAM) is expressed by Müller cells and astrocytes, which are in close contact with the retinal vasculature, during normal developmental angiogenesis.Methodology/Principal FindingsNotably, during oxygen induced retinopathy (OIR) N-CAM accumulated on astrocytes surrounding the epiretinal tufts. Here, we show that N-CAM ablation results in reduced vascular tuft formation due to reduced endothelial cell proliferation despite an elevation in VEGFA mRNA expression, whereas retinal developmental angiogenesis was unaffected.Conclusion/SignificanceWe conclude that N-CAM exhibits a regulatory function in pathological angiogenesis in OIR. This is a novel finding that can be of clinical relevance in diseases associated with proliferative vasculopathy. |
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