Expression of Iron Transporters and Pathological Hallmarks of Parkinson's and Alzheimer's Diseases in the Brain of Young, Adult, and Aged Rats
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摘要Iron accumulates progressively in the brain with age; however, the cause is unknown. We hypothesized that iron accumulation may be associated with the age-induced changes in the expression of iron metabolism proteins in the brain. Here, we systematically investigated iron content and the expression of two major iron importers, transferrin receptor 1 (TfR1) and divalent metal transporter (DMT1), two iron exporters, ferroportin 1 (Fpn1) and ceruloplasmin (CP), and hepcidin, along with the pathological hallmarks of Parkinson’s (PD) and Alzheimer’s diseases (AD) in the brain of young (3 months), adult (12 months), and aged (24 months) rats. We demonstrated that age has a region-specific effect on iron transport proteins along with iron content in the cortex, striatum, hippocampus, and substantia nigra. We also found an age-dependent increase in hyperphosphorylated tau, total beta-amyloid, and neurotoxic oligomeric aggregates in the cortex and hippocampus as well as an increase in α-synuclein and a decrease in tyrosine hydroxylase positive neurons in the substantia nigra. Our findings suggest that the age-dependent increase in brain iron may be partly due to the age-induced increase in DMT1 expression, rather than TfR1 and Fpn1 expression, and also imply that the increased brain iron is associated with expression of the pathological hallmarks of AD and PD.
著者Li-Na Lu, Zhong-Ming Qian, Ka-Chun Wu, Wing-Ho Yung, Ya Ke
期刊名稱Molecular Neurobiology
出版年份2017
月份9
卷號54
期次7
頁次5213 - 5224
國際標準期刊號0893-7648
語言英式英語

上次更新時間 2020-18-10 於 02:27