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ALDH2 attenuates early-stage STZ-induced aged diabetic rats retinas damage via Sirt1/Nrf2 pathway

Mengshan He1, Pan Long2, Weiming Yan2

  • 1Department of Chinese Material Medical and Natural Medicines, Air Force Medical University, Xi'an, Shaanxi, China.

Life Sciences
|October 14, 2018
PubMed
Abstract

Insights

Acetaldehyde dehydrogenase 2 (ALDH2) activation protected aged diabetic rat retinas from damage. This suggests ALDH2 may be a therapeutic target for diabetic retinopathy, potentially by increasing Sirt1 and Nrf2 expression.

Area of Science:

  • Biochemistry
  • Ophthalmology
  • Pharmacology

Background:

  • Acetaldehyde dehydrogenase 2 (ALDH2) is known for protective effects against myocardial damage, stroke, and neurodegeneration.
  • The role of ALDH2 in modulating diabetic retinopathy remains largely unexplored.
  • Diabetic retinopathy is a significant complication of diabetes, leading to vision loss.

Purpose of the Study:

  • To evaluate the protective effects of ALDH2 on retinal damage in streptozocin (STZ)-induced aged diabetic rats.
  • To investigate the underlying mechanisms by which ALDH2 influences diabetic retinal injury.

Main Methods:

  • Aged male Sprague-Dawley rats were induced with diabetes using streptozocin (STZ).
  • Rats were treated with the ALDH2 activator Alda1 or a vehicle control (DMSO).
  • Retinal structural, functional, and molecular changes were assessed at 1, 7, and 30 days post-STZ injection.

Main Results:

  • Alda1 treatment preserved retinal thickness and improved electroretinogram function.
  • Alda1 reduced inflammatory markers (TNF-α, IL-6) and increased antioxidant activity (SOD).
  • Alda1 upregulated ALDH2, Sirt1, and Nrf2 expression while decreasing VEGF-α levels.

Conclusions:

  • ALDH2 activation ameliorates early-stage diabetic retinal damage in aged rats.
  • The protective mechanism may involve the upregulation of Sirt1 and Nrf2 pathways.
  • ALDH2 represents a potential therapeutic target for managing diabetic retinopathy.
Keywords:
ALDH2Aged ratsNrf2STZ-induced diabetesSirt1VEGF-α

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