Angiotensin II receptor subtypes in the human central nervous system

Brain Res. 1995 Mar 27;675(1-2):231-40. doi: 10.1016/0006-8993(95)00076-3.

Abstract

The distribution of the AT1 and AT2 subtypes of angiotensin II receptor was mapped in the adult human central nervous system using quantitative in vitro autoradiography. Binding in all forebrain, midbrain, pontine, medullary and spinal cord sites where angiotensin II receptors have previously been described is of the AT1 subtype, as is binding in the small and large arteries in the adjacent meninges and in choroid plexus. By contrast, both AT1 and AT2 receptors occur in the molecular layer of the cerebellum. Angiotensin II AT1 receptors in the brain show a moderate degree of conservation across mammalian species studied so far, whereas expression of AT2 receptors is more variable, and is more restricted in the human CNS than in many other mammals. These differences between the subtype distributions in humans and other animals indicate the need for care when extrapolating the results of animal studies involving the brain angiotensin system.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aged
  • Aged, 80 and over
  • Angiotensin II / antagonists & inhibitors
  • Angiotensin II / metabolism*
  • Angiotensin Receptor Antagonists
  • Autoradiography
  • Biphenyl Compounds / pharmacology
  • Brain / drug effects
  • Brain / metabolism
  • Central Nervous System / drug effects
  • Central Nervous System / metabolism*
  • Female
  • Humans
  • Imidazoles / pharmacology
  • Losartan
  • Male
  • Pyridines / pharmacology
  • Radioligand Assay
  • Receptors, Angiotensin / agonists
  • Receptors, Angiotensin / metabolism*
  • Spinal Cord / drug effects
  • Spinal Cord / metabolism
  • Tetrazoles / pharmacology

Substances

  • Angiotensin Receptor Antagonists
  • Biphenyl Compounds
  • Imidazoles
  • Pyridines
  • Receptors, Angiotensin
  • Tetrazoles
  • Angiotensin II
  • PD 123177
  • Losartan