Updated TDP-43 in Alzheimer's disease staging scheme

Acta Neuropathologica
Keith A JosephsDennis W Dickson

Abstract

In this study, we update the TDP-43 in Alzheimer's disease staging scheme by assessing the topography of TDP-43 in 193 cases of Alzheimer's disease, in 14 different brain regions (eight previously described plus six newly reported) and use conditional probability to model the spread of TDP-43 across the 14 brain regions. We show that in addition to the eight original regions we previously reported [amygdala, entorhinal cortex, subiculum, dentate gyrus of the hippocampus, occipitotemporal cortex, inferior temporal cortex, middle frontal cortex and basal ganglia (putamen/globus pallidum)] that TDP-43 is also deposited in the insular cortex, ventral striatum, basal forebrain, substantia nigra, midbrain tectum, and the inferior olive of the medulla oblongata, in Alzheimer's disease. The conditional probability analysis produced six significantly different stages (P < 0.01), and suggests that TDP-43 deposition begins in the amygdala (stage 1), then moves to entorhinal cortex and subiculum (stage 2); to the dentate gyrus of the hippocampus and occipitotemporal cortex (stage 3); insular cortex, ventral striatum, basal forebrain and inferior temporal cortex (stage 4); substantia nigra, inferior olive and midbrain tectum (stage 5); and ...Continue Reading

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