Seed-competent tau monomer initiates pathology in a tauopathy mouse model.
Seed-competent tau monomer initiates pathology in a tauopathy mouse model.
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DOI:
10.1016/j.jbc.2022.102163
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发表时间:
2022-08
影响因子:
4.8
通讯作者:
Diamond, Marc, I
中科院分区:
文献类型:
--
作者:
Mirbaha, Hilda;Chen, Dailu;Mullapudi, Vishruth;Terpack, Sandi Jo;White, Charles L.;Joachimiak, Lukasz A.;Diamond, Marc, I
Tau aggregation into ordered assemblies causes neurodegenerative tauopathies. We previously reported that tau monomer exists in either inert (Mi) or seed-competent (Ms) conformational ensembles and that Ms encodes strains, that is, unique, self-replicating, biologically active assemblies. It is unknown if disease begins with Ms formation followed by fibril assembly or if Ms derives from fibrils and is therefore an epiphenomenon. Here, we studied a tauopathy mouse model (PS19) that expresses full-length mutant human (1N4R) tau (P301S). Insoluble tau seeding activity appeared at 2 months of age and insoluble tau protein assemblies by immunoblot at 3 months. Tau monomer from mice aged 1 to 6 weeks, purified using size-exclusion chromatography, contained soluble seeding activity at 4 weeks, before insoluble material or larger assemblies were observed, with assemblies ranging from n = 1 to 3 tau units. By 5 to 6 weeks, large soluble assemblies had formed. This indicated that the first detectable pathological forms of tau were in fact Ms. We next examined posttranslational modifications of tau monomer from 1 to 6 weeks. We detected no phosphorylation unique to Ms in PS19 or human Alzheimer’s disease brains. We conclude that tauopathy begins with formation of the Ms monomer, whose activity is phosphorylation independent. Ms then self assembles to form oligomers before it forms insoluble fibrils. The conversion of tau monomer from Mi to Ms thus constitutes the first detectable step in the initiation of tauopathy in this mouse model, with obvious implications for the origins of tauopathy in humans.
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影响因子:
16.2
作者:
Kaufman SK;Sanders DW;Thomas TL;Ruchinskas AJ;Vaquer-Alicea J;Sharma AM;Miller TM;Diamond MI
通讯作者:
Diamond MI
影响因子:
16.6
作者:
Ambadipudi S;Biernat J;Riedel D;Mandelkow E;Zweckstetter M
通讯作者:
Zweckstetter M
影响因子:
1.2
作者:
Furman, Jennifer L.;Holmes, Brandon B.;Diamond, Marc I.
通讯作者:
Diamond, Marc I.
影响因子:
4.8
作者:
Mirbaha, Hilda;Holmes, Brandon B.;Diamond, Marc I.
通讯作者:
Diamond, Marc I.
影响因子:
16.2
作者:
Sanders DW;Kaufman SK;DeVos SL;Sharma AM;Mirbaha H;Li A;Barker SJ;Foley AC;Thorpe JR;Serpell LC;Miller TM;Grinberg LT;Seeley WW;Diamond MI
通讯作者:
Diamond MI