Increased expression of TrkB and Capzb2 accompanies preserved cognitive status in early alzheimer disease pathology
Journal of Neuropathology and Experimental Neurology, ISSN: 0022-3069, Vol: 71, Issue: 7, Page: 654-664
2012
- 23Citations
- 59Captures
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Metrics Details
- Citations23
- Citation Indexes23
- 23
- CrossRef13
- Captures59
- Readers59
- 59
Article Description
Brain-derived neurotrophic factor (BDNF) and its receptor tyrosine kinase B (TrkB) may influence brain reserve, the ability of the brain to tolerate pathological changes without significant decline in function. Here, we explore whether a specifically vulnerable population of human neurons shows a compensatory response to the neuropathological changes of Alzheimer disease (AD) and whether that response depends on an upregulation of the BDNF pathway. We observed increased neuronal TrkB expression associated with early-stage AD pathology (Braak and Braak stages I-II) in hippocampal CA1 region samples from cognitively intact Framingham Heart Study subjects (n = 5) when compared with cognitively intact individuals with no neurofibrillary tangles (n = 4). Because BDNF/TrkB signaling affects memory formation and retention through modification of the actin cytoskeleton, we examined the expression of actin capping protein β2 (Capzb2), a marker of actin cytoskeleton reorganization. Capzb2 expression was also significantly increased in CA1 hippocampal neurons of cognitively intact subjects with early-stage AD pathology. Our data suggest that increased expression of TrkB and Capzb2 accompanies adequate brain reserve in the initial stages of AD pathology. In subsequent stages of AD, the higher levels of TrkB and Capzb2 expression achieved may not be sufficient to prevent cognitive decline. © 2012 by the American Association of Neuropathologists, Inc.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84862903771&origin=inward; http://dx.doi.org/10.1097/nen.0b013e31825d06b7; http://www.ncbi.nlm.nih.gov/pubmed/22710966; https://academic.oup.com/jnen/article-lookup/doi/10.1097/NEN.0b013e31825d06b7; https://dx.doi.org/10.1097/nen.0b013e31825d06b7; https://academic.oup.com/jnen/article/71/7/654/2917449; https://academic.oup.com/jnen/article-pdf/71/7/654/9562036/71-7-654.pdf; http://jnen.oxfordjournals.org/lookup/doi/10.1097/NEN.0b013e31825d06b7; http://jnen.oxfordjournals.org/cgi/doi/10.1097/NEN.0b013e31825d06b7; http://jnen.oxfordjournals.org/content/71/7/654
Oxford University Press (OUP)
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