title: Altered free amino acid levels in brain cortex tissues of mice with Alzheimer's disease as their N(O,S)-ethoxycarbonyl/tert-butyldimethylsilyl derivatives.
abstract: The altered amino acid (AA) levels as neurotransmitter closely correlate to neurodegenerative conditions including Alzheimer's disease (AD). Target profiling analysis of nineteen AAs in brain cortex samples from three Tg2576 mice as AD model and three littermate mice as control model was achieved as their N(O,S)-ethoxycarbonyl/tert-butyldimethylsilyl derivatives by gas chromatography. Subsequently, star pattern recognition analysis was performed on the brain AA levels of AD mice after normalization to the corresponding control median values. As compared to control mice, gamma-aminobutyric acid among ten AAs found in brain samples was significantly reduced (P 0.01) while leucine was significantly elevated (P 0.02) in AD mice. The normalized AA levels of the three AD mice were transformed into distorted star patterns which was different from the decagonal shape of control median. The present method allowed visual discrimination of the three AD mice from the controls based on the ten normalized AA levels.
authors.affiliation: Institute for Neureregeneration and Stem Cell Research, School of Medicine, Ajou University, Suwon, Korea.
authors.forename: Man-Jeong
authors.initials: MJ
authors.lastname: Paik
authors.forename: In-Seon
authors.initials: IS
authors.lastname: Cho
authors.forename: Inhee
authors.initials: I
authors.lastname: Mook-Jung
authors.forename: Gwang
authors.initials: G
authors.lastname: Lee
authors.forename: Kyoung-Rae
authors.initials: KR
authors.lastname: Kim
mesh_terms: D000544:Alzheimer Disease / Q000175:diagnosis; D000596:Amino Acids / Q000032:analysis*; D000818:Animals; D002255:Carbonic Acid / Q000737:chemistry; D002540:Cerebral Cortex / Q000737:chemistry* / Q000473:pathology; D004129:Dimethylpolysiloxanes / Q000737:chemistry*; D004195:Disease Models, Animal; D005019:Ethyl Ethers / Q000737:chemistry; D006801:Humans; D051379:Mice; D008822:Mice, Transgenic; D011237:Predictive Value of Tests
chemical_list: D000596:Amino Acids; D004129:Dimethylpolysiloxanes; D005019:Ethyl Ethers; D002255:Carbonic Acid