alexa Human serum transthyretin levels correlate inversely with Alzheimer's disease.


Journal of Alzheimers Disease & Parkinsonism

Author(s): Han SH, Jung ES, Sohn JH, Hong HJ, Hong HS,

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Abstract Alzheimer's disease (AD) is the fastest growing neurodegenerative disease in the elderly population, and the search for therapeutic targets and diagnostic AD biomarkers is an exigent issue. Because amyloid-β (Aβ) aggregation constitutes the epicenter of AD pathology, Aβ-binding proteins that regulate Aβ aggregation, such as transthyretin (TTR), have attracted much attention. TTR binds to Aβ, prevents its aggregation, and consequently inhibits Aβ-induced cellular toxicity. Decreased TTR levels in cerebrospinal fluid (CSF) from AD patients suggest that TTR is a biomarker of AD. But, studies on TTR as a biomarker have focused on CSF; no study has evaluated peripheral levels of TTR in AD. Here, we examined the relationship between serum TTR levels and AD. We measured TTR levels in serum samples from 90 nondemented controls and 111 AD patients and observed significantly lower serum TTR levels in AD (p < 0.001). Notably, females in the control group had lower serum TTR levels compared with male in the control (p = 0.006), while no difference in gender was noted in the AD group. There were no age-related changes in serum TTR levels. Thus, this study demonstrates a clear negative correlation between serum TTR levels and AD, suggesting that TTR is not only involved in AD pathological process but also suggested as possible peripheral biomarker for AD diagnosis in serum level. This article was published in J Alzheimers Dis and referenced in Journal of Alzheimers Disease & Parkinsonism

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