Reduction of cortical TrkA but not p75 NTR protein in early-stage Alzheimer's disease

Scott E. Counts, Muhammad Nadeem, Joanne Wuu, Stephen D. Ginsberg, H. Uri Saragovi, Elliott J. Mufson

Research output: Contribution to journalArticle

148 Citations (Scopus)

Abstract

Degeneration of cholinergic nucleus basalis (NB) cortical projection neurons is associated with cognitive decline in late-stage Alzheimer's disease (AD). NB neuron survival is dependent on coexpression of the nerve growth factor (NGF) receptors p75 NTR and TrkA, which bind NGF in cortical projection sites. We have shown previously a significant reduction of NB perikarya expressing p75 NTR and TrkA protein during the early stages of AD. Whether there is a concomitant reduction in cortical levels of these receptors during the progression of AD is unknown. p75 NTR and TrkA protein was evaluated by quantitative immunoblotting in five cortical regions (anterior cingulate, superior frontal, superior temporal, inferior parietal, and visual cortex) of individuals clinically diagnosed with no cognitive impairment (NCI), mild cognitive impairment (MCI), mild/moderate AD, or severe AD. Cortical p75 NTR levels were stable across the diagnostic groups. In contrast, TrkA levels were reduced approximately 50% in mild/moderate and severe AD compared with NCI and MCI in all regions except visual cortex. Mini-Mental Status Examination scores correlated with TrkA levels in anterior cingulate, superior frontal, and superior temporal cortex. The selective reduction of cortical TrkA levels relative to p75 NTR may have important consequences for cholinergic NB function during the transition from MCI to AD.

Original languageEnglish
Pages (from-to)520-531
Number of pages12
JournalAnnals of Neurology
Volume56
Issue number4
DOIs
StatePublished - Oct 1 2004
Externally publishedYes

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Alzheimer Disease
Proteins
Gyrus Cinguli
Visual Cortex
Cholinergic Agents
Neurons
Nerve Growth Factor Receptor
Parietal Lobe
Nerve Growth Factor
Temporal Lobe
Immunoblotting
Cognitive Dysfunction

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

Counts, S. E., Nadeem, M., Wuu, J., Ginsberg, S. D., Saragovi, H. U., & Mufson, E. J. (2004). Reduction of cortical TrkA but not p75 NTR protein in early-stage Alzheimer's disease. Annals of Neurology, 56(4), 520-531. https://doi.org/10.1002/ana.20233

Reduction of cortical TrkA but not p75 NTR protein in early-stage Alzheimer's disease. / Counts, Scott E.; Nadeem, Muhammad; Wuu, Joanne; Ginsberg, Stephen D.; Saragovi, H. Uri; Mufson, Elliott J.

In: Annals of Neurology, Vol. 56, No. 4, 01.10.2004, p. 520-531.

Research output: Contribution to journalArticle

Counts, SE, Nadeem, M, Wuu, J, Ginsberg, SD, Saragovi, HU & Mufson, EJ 2004, 'Reduction of cortical TrkA but not p75 NTR protein in early-stage Alzheimer's disease', Annals of Neurology, vol. 56, no. 4, pp. 520-531. https://doi.org/10.1002/ana.20233
Counts, Scott E. ; Nadeem, Muhammad ; Wuu, Joanne ; Ginsberg, Stephen D. ; Saragovi, H. Uri ; Mufson, Elliott J. / Reduction of cortical TrkA but not p75 NTR protein in early-stage Alzheimer's disease. In: Annals of Neurology. 2004 ; Vol. 56, No. 4. pp. 520-531.
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