title: Binding of curcumin to senile plaques and cerebral amyloid angiopathy in the aged brain of various animals and to neurofibrillary tangles in Alzheimer's brain.
abstract: The binding of curcumin to senile plaques (SPs) and cerebral amyloid angiopathy (CAA) was examined in the aged brain of various animal species and a human patient with Alzheimer's disease (AD), together with its binding to neurofibrillary tangles (NFTs). Brain sections were immunostained with anti-amyloid β protein 1-42 (Aβ42) and anti-amyloid β protein 1-40 (Aβ40) antibodies. These sections were also stained with alkaline Congo red, periodic acid-methenamine silver (PAM), and curcumin (0.009% curcumin solution) with or without formic acid pretreatment. The sections from the AD brain were also immunostained for anti-paired helical filament-tau (PHF-tau), and were stained with Gallyas silver for NFTs. Some SPs in the AD, monkey, dog, bear, and amyloid precursor protein transgenic mouse (APP Tg-mouse) brains contained congophilic materials, and were intensely positive for curcumin. In addition, curcumin labeled some diffuse SPs negative for Congo red in the AD, monkey, bear, and APP Tg-mouse brains. In all animals, CAA was intensely positive for both Congo red and curcumin. The specific curcumin staining activity was lost by formic acid pretreatment. In the AD brain, NFTs positive for PHF-tau and Gallyas silver were moderately stained with curcumin. These findings indicate that curcumin specifically binds to the aggregated Aβ molecules in various animals, and further to phosphorylated tau protein, probably according to its conformational nature.
authors: Department of Veterinary Pathology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Japan.
authors: Mayu
authors: M
authors: Mutsuga
authors: James Kenn
authors: JK
authors: Chambers
authors: Kazuyuki
authors: K
authors: Uchida
authors: Meina
authors: M
authors: Tei
authors: Takao
authors: T
authors: Makibuchi
authors: Tatsuya
authors: T
authors: Mizorogi
authors: Akihiko
authors: A
authors: Takashima
authors: Hiroyuki
authors: H
authors: Nakayama
mesh_terms: D000375:Aging; D000544:Alzheimer Disease / Q000378:metabolism* / Q000473:pathology; D000818:Animals; D001717:Birds / Q000378:metabolism; D001921:Brain / Q000378:metabolism / Q000473:pathology; D016657:Cerebral Amyloid Angiopathy / Q000378:metabolism*; D003474:Curcumin / Q000378:metabolism*; D006801:Humans; D008322:Mammals / Q000378:metabolism; D016874:Neurofibrillary Tangles / Q000378:metabolism*; D058225:Plaque, Amyloid / Q000378:metabolism*; D011485:Protein Binding
chemical_list: D003474:Curcumin