Loss of calbindin-D28K is associated with the full range of tangle pathology within basal forebrain cholinergic neurons in Alzheimer's disease

Saman S. Ahmadian, Aras Rezvanian, Melanie Peterson, Sandra Weintraub, Eileen H. Bigio, Marek Marsel Mesulam, Changiz Geula*

*Corresponding author for this work

Research output: Contribution to journalArticle

18 Scopus citations

Abstract

Basal forebrain cholinergic neurons (BFCN) are selectively vulnerable in Alzheimer's disease (AD). We have shown that most of the BFCN in the human brain contain the calcium-binding protein calbindin-D28K (CB), a large proportion lose their CB in the course of normal aging, and the BFCN which degenerate in AD lack CB. Here, we investigated the relationship between CB in the BFCN and the process of tangle formation in AD using antibodies to tau epitopes that appear early, intermediate or late in the process of tangle formation. Very small percentages (0%-3.7%) of CB-positive BFCN contained pretangles and/or tangles, and very small percentages (0%-5%) of the total BFCN pretangles and/or tangles were in CB-immunoreactive neurons. The number of CB-positive BFCN which contained tau immunoreactivity was highest for the early epitope and lower for intermediate epitopes. A late appearing epitope was absent from CB-positive BFCN. Age-related loss of CB appears to coincide with tangle formation in the BFCN and is associated with the full range of tau pathology, including late appearing epitopes.

Original languageEnglish (US)
Pages (from-to)3163-3170
Number of pages8
JournalNeurobiology of Aging
Volume36
Issue number12
DOIs
StatePublished - Dec 2015

Keywords

  • Alzheimer's disease
  • Basal forebrain cholinergic neurons
  • Calbindin-D
  • Selective neuronal vulnerability
  • Tangles
  • Tau epitope

ASJC Scopus subject areas

  • Neuroscience(all)
  • Aging
  • Clinical Neurology
  • Developmental Biology
  • Geriatrics and Gerontology

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