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Retinal Neurovascular Coupling in Diabetes.

Gerhard Garhöfer1, Jacqueline Chua2,3,4, Bingyao Tan2,4

  • 1Department of Clinical Pharmacology, Medical University Vienna, 1090 Vienna, Austria.

Journal of Clinical Medicine
|September 5, 2020
PubMed
Summary

Neurovascular coupling, or functional hyperemia, is vital for brain blood flow. Its impairment in diabetes may precede diabetic retinopathy, suggesting a role in disease progression.

Keywords:
diabetesfunctional hyperemianeurovascular couplingocular blood flow regulationretina

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Area of Science:

  • Neuroscience
  • Ophthalmology
  • Physiology

Background:

  • Neurovascular coupling (functional hyperemia) regulates blood flow in neural tissues.
  • In the retina, neural activity causes arteriole dilation and increased blood flow.
  • This process ensures adequate nutrient supply for metabolic demands.

Purpose of the Study:

  • To review evidence of impaired neurovascular coupling in diabetes.
  • To cover molecular mechanisms of functional hyperemia in health and disease.
  • To discuss the potential of neurovascular coupling in monitoring diabetic retinopathy.

Main Methods:

  • Review of current scientific literature on neurovascular coupling and diabetes.
  • Analysis of molecular mechanisms underlying functional hyperemia.
  • Discussion of clinical implications for disease monitoring.

Main Results:

  • Impaired neurovascular coupling is an early event in diabetes.
  • Alterations in neurovascular coupling precede visible signs of diabetic retinopathy.
  • Breakdown of functional hyperemia may contribute to diabetic retinopathy and macular edema.

Conclusions:

  • Neurovascular coupling is significantly impaired in diabetic patients.
  • Understanding these mechanisms is crucial for managing diabetic eye disease.
  • Neurovascular coupling offers potential for early disease detection and risk stratification.