Study on Urine Metabolic Profile of Aβ25–35-Induced Alzheimer's Disease Using UHPLC-Q-TOF-MS

Publication date: Available online 11 October 2018Source: NeuroscienceAuthor(s): Yuanyuan Liu, Mengying Wei, Kexin Yue, Mingxin Hu, Shizhe Li, Lihui Men, Zifeng Pi, Zhiqiang Liu, Zhongying LiuAbstractAlzheimer’s disease (AD) is a progressive neurodegenerative disorder, with no effective method for its treatment so far. The pathogenesis of AD has been reported, but the endogenous metabolic profile and disease-related biomarkers are still not clear. To better understand AD, an AD model induced by injecting β-amyloid 25–35 (Aβ 25–35) solution into bilateral hippocampus was developed on Sprague–Dawley rats. After 8 weeks of modeling, the impairment of spatial learning and memory ability in AD rats were assessed by Morris water maze task. Hematoxylin and eosin staining and immunohistochemistry were used to investigate the pathological changes of hippocampus. The neurotransmitter concentrations in the hippocampus were measured using UHPLC-TQ-MS. Urinary metabolomics based on UHPLC-Q-TOF-MS was established to delineate the alterations of endogenous metabolites in AD rats. The results showed that compared with healthy control rats, AD rats suffered from cognitive dysfunction, hippocampus damage, Aβ formation and tau phosphorylation at 8 weeks after surgery, suggesting that the Aβ25–35-induced AD model was successfully established. In addition, the levels of γ-aminobutyric acid, acetylcholine, glycine, norepinephrine, serotonin, taurine and dopamine decreased and gl...
Source: Neuroscience - Category: Neuroscience Source Type: research