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diabetic retinopathy/protease

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Upregulation of Thrombin/Matrix Metalloproteinase-1/Protease-Activated Receptor-1 Chain in Proliferative Diabetic Retinopathy.

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Selective proteolytic activation of protease-activated receptor-1 (PAR1) by thrombin and matrix metalloproteinase-1 (MMP-1) plays a central role in enhancing angiogenesis. We investigated the expression levels of thrombin, MMP-1, and PAR1 and correlated these levels with vascular endothelial growth

[The changes of histology and biochemical parameters in retina of the patient with diabetic retinopathy].

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OBJECTIVE To observe and estimate the distribution the changes of histology and biochemical parameters in retina of the patient with diabetic retinopathy. METHODS Retinas were divided into quadrants and the lesions of diabetic retinopathy were compared among quadrants. the vasculature was isolated

Molecular mechanism of the role of carbamyl erythropoietin in treating diabetic retinopathy rats.

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The aim of the present study was to investigate the therapeutic effects of carbamyl erythropoietin (CEPO) and safflor yellow (SY) in the treatment of rats with diabetic retinopathy (DR) as well as exploring the mechanism of action. Male SD rats were used to establish a diabetes model and

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

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OBJECTIVE 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

Circulating dipeptidyl peptidase-4 activity is associated with diabetic retinopathy in type 1 diabetic patients.

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OBJECTIVE Diabetic retinopathy (DR) is the most frequent complication among patients with type 1 diabetes mellitus (T1DM). Dipeptidyl peptidase-4 (DPP4) is a protease with elevated activity in patients with T1DM. Several studies indicate that DPP4 inhibitors might have beneficial effect on

Elevated neprilysin activity in vitreous of patients with proliferative diabetic retinopathy.

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OBJECTIVE Diabetic retinopathy (DR) is the leading cause of blindness in the industrialized world. Hyperglycemia induces retinal hypoxia, which upregulates a range of vasoactive factors that may lead to macular edema and/or angiogenesis, and hence potentially to sight-threatening retinopathy. The

Diabetic retinopathy is associated with decreased serum levels of free IGF-I and changes of IGF-binding proteins.

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In patients with diabetic retinopathy, elevated serum levels of total circulating insulin-like growth factor-I (IGF-I) have been implicated as an important mediator of the disease. There is no study, however, measuring free IGF-I levels in patients with diabetic retinopathy which mediate the

The role of growth factors in the pathogenesis of diabetic retinopathy.

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Diabetic retinopathy (DR) is the most severe of several ocular complications of diabetes. The earliest clinical signs of DR are microaneurysms and haemorrhages. Later signs include dilated, tortuous irregular veins and retinal non-profusion, leading to retinal ischaemia that ultimately results in

Cathepsin S Cleavage of Protease-Activated Receptor-2 on Endothelial Cells Promotes Microvascular Diabetes Complications.

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Endothelial dysfunction is a central pathomechanism in diabetes-associated complications. We hypothesized a pathogenic role in this dysfunction of cathepsin S (Cat-S), a cysteine protease that degrades elastic fibers and activates the protease-activated receptor-2 (PAR2) on endothelial cells. We

Diabetic retinopathy: could the alpha-1 antitrypsin be a therapeutic option?

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Diabetic retinopathy is one of the most important causes of blindness. The underlying mechanisms of this disease include inflammatory changes and remodeling processes of the extracellular-matrix (ECM) leading to pericyte and vascular endothelial cell damage that affects the retinal circulation. In

Neutrophil elastase contributes to the pathological vascular permeability characteristic of diabetic retinopathy.

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Levels of neutrophil elastase, a serine protease secreted by neutrophils, are elevated in diabetes. The purpose of this study was to determine whether neutrophil elastase (NE) contributes to the diabetes-induced increase in retinal vascular permeability in mice with

Growth factors in retinal diseases: proliferative vitreoretinopathy, proliferative diabetic retinopathy, and retinal degeneration.

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The goal of this review is to present the current knowledge on specific growth factor involvement in posterior segment eye disease. Growth factors can be defined as multifunctional signals which modify cell growth or proliferation, alone or in concert, by binding to specific cell surface receptors.

Quantitative Proteomics Analysis of Vitreous Humor from Diabetic Retinopathy Patients.

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Initial triggers for diabetic retinopathy (DR) are hyperglycemia-induced oxidative stress and advanced glycation end-products. The most pathological structural changes occur in retinal microvasculature, but the overall development of DR is multifactorial, with a complex interplay of microvascular,

Poly(lactic-co-glycolic acid) nanoparticle-mediated interleukin-12 delivery for the treatment of diabetic retinopathy.

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Diabetic retinopathy (DR) is a complication of diabetes that affects the eyes and vision. It is a leading cause of visual impairment and blindness in working-age people. Vascular endothelial growth factor-A (VEGF-A) is a primary initiator and potential mediator of DR. Matrix

The kallikrein-kinin system in diabetic retinopathy.

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Diabetic retinopathy (DR) is a major microvascular complication associated with type 1 and type 2 diabetes mellitus, which can lead to visual impairment and blindness. Current treatment strategies for DR are mostly limited to laser therapies, steroids, and anti-VEGF agents, which are often
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