Alterations in TRH receptors in temporal lobe of schizophrenics: A quantitative autoradiographic study

Nedra Lexow, Jeffery N. Joyce, Soo Jin Kim, Jennifer Phillips, Manuel F. Casanova, Edward D. Bird, Joel E. Kleinman, Andrew Winokur

Research output: Contribution to journalArticlepeer-review

Abstract

We utilized quantitative autoradiography to determine the distribution of receptors for thyrotropin‐releasing hormone (TRH) throughout the human temporal lobe and to examine the distribution of these receptors in discrete subregions of the temporal lobe from patients diagnosed premortem with schizophrenia. When compared to non‐neurologic controls, schizophrenic patients demonstrated an increase of 51% in the concentration of TRH receptors in the molecular layer of the dentate gyrus. Within nuclei of the schizophrenic amygdala, marked decreases were found in the central (44%), medial (38%), cortical (36%), accessory cortical (52%), lateral (54%), and medial basal (22%) nuclei. We also examined postmortem brain samples from patients with Huntington's disease, amyotrophic lateral sclerosis, and Alzheimer's disease for alterations in the distribution of TRH receptors. No significant differences from non‐neuropsychiatric controls were noted within the hippocampus in any of these disease states; however, slight alterations were noted in the central and medial basal amygdala in Huntington's disease and in the cortical amygdala in Alzheimer's disease. These disease‐specific findings suggest that TRH may play a role in the neurochemical dysfunction of schizophrenia. © 1994 Wiley‐Liss, Inc.

Original languageEnglish (US)
Pages (from-to)315-327
Number of pages13
JournalSynapse
Volume18
Issue number4
DOIs
StatePublished - Dec 1994
Externally publishedYes

Keywords

  • Alzheimer's disease Amyotrophic lateral sclerosis
  • Amygdala
  • Hippocampus
  • Huntington's disease
  • Thyrotropin‐releasing hormone

ASJC Scopus subject areas

  • Cellular and Molecular Neuroscience

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