Massive deposition of amyloid β peptides (Aβ) as senile plaques (SP) characterizes the brain pathology of Alzheimer’s disease (AD). SPs exhibit a variety of morphologies, although little is known about the SP components that determine their morphology. Collagenous Alzheimer amyloid plaque component (CLAC) is one of the major non-Aβ proteinaceous components of SP amyloid in AD brains. Here we show that overexpression of CLAC precursor (CLAC-P) in the brains of APP transgenic mice results in a significant remodeling of amyloid pathology, i.e., reduction in diffuse-type amyloid plaques and an increase in compact plaques laden with thioflavin S-positive amyloid cores. In vivo microdialysis revealed a significant decrease in Aβ in the brain interstitial fluid of CLAC-P/APP double transgenic mice compared with APP transgenic mice. These findings implicate CLAC in the compaction of Aβ in amyloid plaques and the brain dynamics of Aβ.
CITATION STYLE
Hashimoto, T., Fujii, D., Naka, Y., Kashiwagi-Hakozaki, M., Matsuo, Y., Matsuura, Y., … Iwatsubo, T. (2020). Collagenous Alzheimer amyloid plaque component impacts on the compaction of amyloid-β plaques. Acta Neuropathologica Communications, 8(1). https://doi.org/10.1186/s40478-020-01075-5
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