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FEBS Lett. 2008 Aug 20;582(19):2899-904. doi: 10.1016/j.febslet.2008.07.027. Epub 2008 Jul 24.

Abnormal phosphorylation of Ser409/410 of TDP-43 in FTLD-U and ALS.

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Department of Molecular Neurobiology, Tokyo Institute of Psychiatry, Tokyo Metropolitan Organization for Medical Research, 2-1-8 Kamikitazawa, Setagaya-ku, Tokyo 156-8585, Japan.


A monoclonal antibody specific for phosphoserines 409 and 410 of TDP-43 (mAb pS409/410) has been produced. It strongly stained TDP-43-positive inclusions in brain of patients with frontotemporal lobar degeneration and amyotrophic lateral sclerosis, but did not stain nuclei, in which normal TDP-43 is localized. It did not recognize TDP-43 rapidly extracted from brains of rats at various developmental stages, strongly suggesting that phosphorylation of Ser409/410 is an abnormal event. Analysis of postmortem changes of TDP-43 revealed that the amounts of Sarkosyl-insoluble, urea-soluble full-length TDP-43 and a 35kDa N-terminal fragment increased time-dependently.

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