Investigating the role of nitric oxide in regulating blood flow and oxygen delivery from in vivo electrochemical measurements in eye and brain

Donald G. Buerk, Dmitriy N. Atochin, Charles E. Riva

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We have previously shown from direct, in vivo measurements of NO in cats with recessed electrochemical microsensors that NO mediates increases in ONH blood flow during functional activation of the eye by flickering light. We have also reported that there are low frequency (<15 cycles/min) spontaneous oscillations in NO that appear to be passively coupled to oscillations in blood flow at similar frequencies in the cat ONH. In this paper, we describe similarities between in vivo measurements of NO in the ONH of the cat eye and in the cortex of the rat brain. These data are consistent with a role for NO in the coupling of blood flow with increases in neuronal activity, autoregulation of blood flow, hyperemia, and vasodilation during hypoxia and hypercapnia.

Original languageEnglish
Pages (from-to)359-370
Number of pages12
JournalAdvances in Experimental Medicine and Biology
Volume530
Publication statusPublished - 2003
Externally publishedYes

Fingerprint

Brain
Nitric Oxide
Blood
Oxygen
Cats
Flickering
Microsensors
Hypercapnia
Hyperemia
Vasodilation
Rats
Homeostasis
Chemical activation
Light

Keywords

  • Autoregulation
  • Blood flow
  • Brain
  • Electrochemical microsensor
  • Functional activation
  • Hypercapnia
  • Nitric oxide
  • Optic nerve
  • Oxygen
  • Somatosensory cortex

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

Cite this

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AU - Buerk, Donald G.

AU - Atochin, Dmitriy N.

AU - Riva, Charles E.

PY - 2003

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KW - Blood flow

KW - Brain

KW - Electrochemical microsensor

KW - Functional activation

KW - Hypercapnia

KW - Nitric oxide

KW - Optic nerve

KW - Oxygen

KW - Somatosensory cortex

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