Alz-50 immunoreactivity in the thalamic reticular nucleus in Alzheimer's disease

Warren G. Tourtellotte, Gary W. Van Hoesen*, Bradley T. Hyman, Ravinder K. Tikoo, Antonio R. Damasio

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


Examination of the thalamic reticular nucleus (Rt) with the monoclonal antibody Alz-50 in brains of Alzheimer's disease patients reveals dense extracellular and terminal-like immunoreactivity in the absence of neurofibrillary tangles or neuritic plaques. Similar terminal-like immunoreactivity is not present in other thalamic nuclei of AD brains or in the brains of controls. Based on (1) an immunocytochemical and histopathological analysis of areas known to project to the Rt, (2) that Alz-50 immunocytochemistry reveals immunoreactive nuerons, neurofibrillary tangles and neuritic plaques, and (3) evidence that Alz-50 immunoreactivity can be demonstrated in the terminal fields of immunoreactive neurons, the terminal-like immunoreactivity in the Rt probably corresponds to altered preterminal axons and terminals from degenerating basal forebrain neurons. Given the presumed physiological role of the Rt, these selective lesions could alter thalamocortical processing and contribute to the cognitive impairment in Alzheimer's disease.

Original languageEnglish (US)
Pages (from-to)227-234
Number of pages8
JournalBrain research
Issue number1-2
StatePublished - May 7 1990


  • Acetylcholine
  • Alz-50
  • Alzheimer's disease
  • Nucleus Basalis of Meynert
  • Reticular nucleus
  • Terminal
  • Thalamus

ASJC Scopus subject areas

  • General Neuroscience
  • Molecular Biology
  • Clinical Neurology
  • Developmental Biology


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