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(Pro)renin receptor is associated with angiogenic activity in proliferative diabetic retinopathy.

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Title: (Pro)renin receptor is associated with angiogenic activity in proliferative diabetic retinopathy.
Authors: Kanda, A. Browse this author
Noda, K. Browse this author
Saito, W. Browse this author
Ishida, S. Browse this author
Keywords: Angiogenesis
Diabetic retinopathy
(Pro)renin receptor
Receptor-associated prorenin system
Renin–angiotensin system
Vascular endothelial growth factor
Issue Date: Nov-2012
Publisher: Berlin Springer Verlag
Journal Title: Diabetologia
Volume: 55
Issue: 11
Start Page: 3104
End Page: 3113
Publisher DOI: 10.1007/s00125-012-2702-2
PMID: 22930161
Abstract: AIMS/HYPOTHESIS: The renin-angiotensin system (RAS) potentially has a role in the development of end-organ damage, and tissue RAS activation has been suggested as a risk factor for diabetic retinopathy. We have recently shown significant involvement of (pro)renin receptor ([P]RR) in retinal inflammation in a rodent model of early diabetes. In this study we aim to elucidate the (P)RR-associated pathogenesis of fibrovascular proliferation, a late-stage angiogenic complication in human diabetic retinopathy. METHODS: Vitreous fluids from 23 eyes of patients with proliferative diabetic retinopathy (PDR) and 16 eyes of controls with non-diabetic, idiopathic macular diseases (macular hole and epiretinal membrane) were collected. Protein levels of soluble (P)RR were measured by ELISA, and immunofluorescence was performed to assess the localisation of (P)RR and related molecules in fibrovascular tissues from PDR eyes. RESULTS: (P)RR immunoreactivity was detected in neovascular endothelial cells, colocalised with prorenin, phosphorylated extracellular signal-regulated kinase (ERK) and vascular endothelial growth factor (VEGF). Prorenin application to human retinal microvascular endothelial cells significantly upregulated mRNA expression of VEGF, especially the VEGF165 isoform, which was abolished by (P)RR or ERK signalling blockade. Proteases known to cleave (P)RR, including furin, were positive in endothelial cells in fibrovascular tissues. Protein levels of soluble (P)RR in vitreous fluids were higher in PDR eyes than in non-diabetic control eyes, and correlated significantly with vitreous prorenin and VEGF levels and the vascular density of fibrovascular tissues. CONCLUSIONS/INTERPRETATION: Our data using human samples provide the first evidence that (P)RR is associated with angiogenic activity in PDR.
Rights: The final publication is available at
Type: article (author version)
Appears in Collections:医学院・医学研究院 (Graduate School of Medicine / Faculty of Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 神田 敦宏

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