5-HT1B receptor binding in degenerative movement disorders

Brain Res. 1998 Apr 20;790(1-2):323-8. doi: 10.1016/s0006-8993(97)01566-7.

Abstract

Using [3H]sumatriptan as a radioligand, 5-hydroxytryptamine (5-HT)1B receptors were examined in posterior striatum and midbrain post-mortem tissue sections of 12 patients who had died from representative degenerative movement disorders as compared to nine controls. In the control human basal ganglia, the highest densities of [3H]sumatriptan binding were observed in the globus pallidus and substantia nigra. No significant change in the density of [3H]sumatriptan binding sites was found in the striatum and substantia nigra of the six Parkinson's disease brains. In the two brains from patients with progressive supranuclear palsy an increase was found in the densities of [3H]sumatriptan binding sites, most marked in the substantia nigra. In contrast, [3H]sumatriptan labelling was almost absent in the striatonigral degeneration brain and was markedly reduced in the three Huntington's disease brains. This study indicates that the status of 5-HT1B receptors is different in each degenerative movement disorder and suggests that human 5-HT1B receptors are located somatodendritically on GABAergic and peptidergic caudate-putamen neurons which project to the substantia nigra and globus pallidus, where these receptors are presynaptic.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aged
  • Aged, 80 and over
  • Corpus Striatum / chemistry*
  • Corpus Striatum / pathology
  • Female
  • Humans
  • Huntington Disease / metabolism
  • Huntington Disease / pathology
  • Male
  • Middle Aged
  • Movement Disorders / metabolism*
  • Movement Disorders / pathology
  • Nerve Degeneration / metabolism
  • Nerve Degeneration / pathology
  • Parkinson Disease / metabolism
  • Parkinson Disease / pathology
  • Radioligand Assay
  • Receptor, Serotonin, 5-HT1B
  • Receptors, Serotonin / analysis*
  • Receptors, Serotonin / metabolism*
  • Serotonin Receptor Agonists / metabolism
  • Serotonin Receptor Agonists / pharmacology
  • Substantia Nigra / chemistry*
  • Substantia Nigra / pathology
  • Sumatriptan / metabolism
  • Sumatriptan / pharmacology
  • Supranuclear Palsy, Progressive / metabolism
  • Supranuclear Palsy, Progressive / pathology
  • Tritium

Substances

  • HTR1B protein, human
  • Receptor, Serotonin, 5-HT1B
  • Receptors, Serotonin
  • Serotonin Receptor Agonists
  • Tritium
  • Sumatriptan