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Related Concept Videos

Diabetic Retinopathy01:27

Diabetic Retinopathy

DefinitionDiabetic retinopathy is a microvascular complication of diabetes affecting the retinal blood vessels.Risk FactorsDiabetic retinopathy is present in almost all individuals with type 1 diabetes and more than 60% of those with type 2 diabetes after two decades of disease.The risk increases with poor glycemic control, hypertension, dyslipidemia, smoking, pregnancy, and puberty.Although cataracts and glaucoma are also more frequent in people with diabetes, retinopathy remains the leading...
Diabetic Nephropathy01:28

Diabetic Nephropathy

Definition Diabetic nephropathy is a chronic kidney complication that results from prolonged hyperglycemia.Prevalence It is the most common cause of chronic kidney disease (CKD) and end-stage renal disease (ESRD) worldwide, affecting up to half of individuals with diabetes.Pathophysiology • Sustained hyperglycemia triggers multiple hemodynamic and metabolic changes in the kidney. • Early in the disease, increased renal blood flow and glomerular hyperfiltration occur due to afferent arteriolar...
Diabetic Neuropathy01:22

Diabetic Neuropathy

DefinitionDiabetic neuropathy is nerve damage caused by long-standing diabetes mellitus. It results directly from prolonged high blood sugar levels.PathophysiologyThe pathophysiology of diabetic neuropathy involves both metabolic and vascular disturbances triggered by chronic hyperglycemia.Metabolic injury: Elevated glucose levels activate the polyol pathway within nerve cells, leading to the accumulation of sorbitol and fructose. This increases oxidative stress, disrupts normal nerve...

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Related Experiment Video

Updated: May 31, 2026

An Assay to Detect Protection of the Retinal Vasculature from Diabetes-Related Death in Mice
04:36

An Assay to Detect Protection of the Retinal Vasculature from Diabetes-Related Death in Mice

Published on: January 12, 2024

RBP4 Aggravates Diabetic Retinopathy by Inducing Microglial Activation and Endothelial Inflammation.

Ying Shi1,2, Congjuan Mao1, Di Zhang1

  • 1Tianjin Key Laboratory of Inflammation Biology, Province and Ministry Co-sponsored Collaborative Innovation Center for Medical Epigenetics, Department of Pharmacology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin, China.

Diabetes
|May 28, 2026
PubMed
Summary
This summary is machine-generated.

Elevated Retinol-binding protein 4 (RBP4) worsens diabetic retinopathy (DR) by damaging eye vessels and nerves. Reducing RBP4 or inhibiting microglia may protect against DR-related vision loss.

More Related Videos

Retinal Pathophysiological Evaluation in a Rat Model
09:11

Retinal Pathophysiological Evaluation in a Rat Model

Published on: May 6, 2022

Related Experiment Videos

Last Updated: May 31, 2026

An Assay to Detect Protection of the Retinal Vasculature from Diabetes-Related Death in Mice
04:36

An Assay to Detect Protection of the Retinal Vasculature from Diabetes-Related Death in Mice

Published on: January 12, 2024

Retinal Pathophysiological Evaluation in a Rat Model
09:11

Retinal Pathophysiological Evaluation in a Rat Model

Published on: May 6, 2022

Area of Science:

  • Ophthalmology
  • Endocrinology
  • Molecular Biology

Background:

  • Retinol-binding protein 4 (RBP4) is elevated in the vitreous humor of diabetic retinopathy (DR) patients.
  • Increased RBP4 exacerbates vascular and neuronal deficits in DR models.

Purpose of the Study:

  • To investigate the role of RBP4 in DR pathogenesis.
  • To explore the mechanisms by which RBP4 affects retinal cells and contributes to DR.

Main Methods:

  • Utilized streptozotocin-induced diabetic mice and RBP4 transgenic mice.
  • Examined the effects of hyperglycemia and RBP4 on retinal microvascular endothelial cells.
  • Investigated the RBP4-mediated activation of retinal microglia via the TLR4/NF-κB/MAPK pathway.
  • Assessed the impact of microglial depletion or inhibition on RBP4-induced neurodegeneration.

Main Results:

  • Elevated vitreous RBP4 worsened vascular and neuronal deficits in diabetic mice.
  • Hyperglycemia amplified RBP4-induced inflammation in retinal endothelial cells, worsening vascular pathology.
  • RBP4 activated retinal microglia through the TLR4/NF-κB/MAPK pathway.
  • Microglial inhibition or depletion ameliorated RBP4-induced retinal neurodegeneration.

Conclusions:

  • RBP4 plays a significant role in exacerbating both vascular and neuronal damage in diabetic retinopathy.
  • The inflammatory response in retinal microvascular endothelial cells and microglial activation are key mechanisms mediating RBP4's detrimental effects in DR.
  • Targeting RBP4 or microglial activation presents a potential therapeutic strategy for managing diabetic retinopathy.