cis pT231-Tau Drives Neurodegeneration in Bipolar Disorder.

Abstract:

:Bipolar disorder is a complex neuropsychiatric disorder, characterized by intermittent episodes of mania and depression. Recent studies have indicated argyrophilic grains, composed of hyperphosphorylated tau, are observable in postmortem brains of bipolar patients. It remains uncertain how tau hyperphosphorylation results in neurodegeneration upon the disease. Recent studies have demonstrated that phosphorylated tau at Thr231 exists in two distinct cis and trans conformations, in which cis pT231-tau is highly neurotoxic and acts as an early driver of tauopathy in several neurodegenerative diseases. We herein employed an in vitro model, which resembles some aspects of bipolar disorder, to study the cis p-tau mediatory role. We established GSK3β overexpressing SH-SY5Y cells and examined cell viability, cis p-tau formation, and lithium effects by immunofluorescence and flow cytometry. We found an increase in cis p-tau levels as well as viability decrease in the cell model. Furthermore, we discovered that lithium treatment inhibits cis p-tau formation, resulting in diminished cell death. We also examined BD and healthy human brain samples and detected cis p-tau in the patients' brains. Our results show that tauopathy, observed in bipolar disorder, is being mediated through cis p-tau and that a conformer could be the cause of neurodegeneration upon the disease. Our findings would suggest novel therapeutic target to fight the devastating disorder.

journal_name

ACS Chem Neurosci

authors

Naserkhaki R,Zamanzadeh S,Baharvand H,Nabavi SM,Pakdaman H,Shahbazi S,Vosough M,Ghaedi G,Barzegar A,Mirtorabi D,Hedayatshodeh M,Ehsani E,Falahati M,Hajipour MJ,Shahpasand K

doi

10.1021/acschemneuro.8b00629

subject

Has Abstract

pub_date

2019-03-20 00:00:00

pages

1214-1221

issue

3

issn

1948-7193

journal_volume

10

pub_type

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