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Ze-Ping Hu; Edward R. Browne; Tao Liu; Thomas E Angel; Paul C. Ho; Eric Chun Yong Chan(Profiled Author: Zeping Hu)
Journal of Proteome Research. 2012;11(12):5903-5913.Abstract
Identification of molecular mechanisms underlying early stage Alzheimer's disease (AD) is important for the development of new therapies against and diagnosis of AD. In this study, nontargeted metabonomics of TASTPM transgenic AD mice was performed. The metabolic profiles of both brain and plasma of TASTPM mice were characterized using gas chromatography-mass spectrometry and compared to those of wild-type C57BL/6J mice. TASTPM mice were metabolically distinct compared to wild-type mice (Q2Y = 0.587 and 0.766 for PLS-DA models derived from brain and plasma, respectively). A number of metabolites were found to be perturbed in TASTPM mice in both brain (d-fructose, l-valine, l-serine, l-threonine, zymosterol) and plasma (d-glucose, d-galactose, linoleic acid, arachidonic acid, palmitic acid and d-gluconic acid). In addition, enzyme immunoassay confirmed that selected endogenous steroids were significantly perturbed in brain (androstenedione and 17-OH-progesterone) and plasma (cortisol and testosterone) of TASTPM mice. Ingenuity pathway analysis revealed that perturbations related to amino acid metabolism (brain), steroid biosynthesis (brain), linoleic acid metabolism (plasma) and energy metabolism (plasma) accounted for the differentiation of TASTPM and wild-type mice. Our results provided insights on the pathogenesis of APP-induced AD and reinforced the role of TASTPM in drug and biomarker development. © 2012 American Chemical Society.
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