期刊
JOURNAL OF NEUROPATHOLOGY AND EXPERIMENTAL NEUROLOGY
卷 67, 期 10, 页码 963-975出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/NEN.0b013e318187a80f
关键词
dementia; frontotemporal lobar degeneration; tau; tauopathy; white matter
资金
- European Union [FP6, BNEII, LSHM-CT-2004-503039]
- United Kingdom Medical Research Council
- National Institutes of Health Public Health Service [AG 10133]
- MRC [MC_U105184291, MC_U105184319] Funding Source: UKRI
- Medical Research Council [MC_U105184319, MC_U105184291] Funding Source: researchfish
Frontotemporal lobar degenerations are a group of disorders characterized by circumscribed degeneration of the frontal and temporal lobes and diverse histopathologic features. We report clinical, neuropathologic, ultrastructural, biochemical, and genetic data on 7 individuals with a 4-repeat tauopathy characterized by the presence of globular glial inclusions (GGIs) in brain white matter. Clinical manifestations were compatible with the behavioral variant of frontotemporal dementia and included motor neuron symptoms; there was prominent neuronal loss in the frontal and temporal cortex, subiculum, and amygdala. The Surrounding white matter showed abundant GGIs composed of abnormal filaments present mostly in oligodendrocytes. The severity of white matter tau abnormalities correlated with it reduction in myelin and axons and with microglial activation. Western blotting of sarkosyl-insoluble tau demonstrated the presence of 2 major tau bands of 64 and 68 kd. No mutations in the microtubule-associated protein tau gene were detected in 2 affected individuals. We propose that 4-repeat tau-immunoreactive GGIs are the neuroropathologic hallmark of a distinct sporadic tauopathy with variable clinical presentations that include frontotemporal dementia and occasionally upper motor neuron disease. This type of tauopathy with GGIs expands the group of neurodegenerative disorders in which oligodendroglial pathology predominates, beyond the synucleinopathy multiple system atrophy disorders.
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