Brain, Vol. 118, No. 1, 119-129, 1995
© 1995 Oxford University Press
research-article |
Neurofibrillary tangles in NiemannPick disease type C
1Department of Neuropathology, Frenchay Hospital Bristol 2Department of Pathology, Southmead Hospital Bristol 3Department of Neuropathology, University of Leeds Leeds, UK
Correspondence to:
Dr S. Love, Department of Neuropathology, Frenchay Hospital, Bristol BS16 ILE, UK
Post-mortem neuropathological examination of five cases of Niemann-Pick disease type C revealed neurofibrillary tangles in many parts of the brain. Tangles were a consistent finding in the hippocampus, hypothalamus, substantia innominata, midbrain pons and medulla. Other regions of the brain in which tangles were present included neocortex, basal ganglia, thalamus, cerebellar cortex in one case, and dentate nucleus in another. The tangles were argyrophilic, fluoresced under ultraviolet light when stained with thioflavin S, and reacted strongly with antibody to tau protein. Some of the tangles could be immunostained for ubiquitin. Electron microscopy, performed in one of the cases, showed the tangles to consist of paired helical filaments ultrastructurally identical to those of Alzheimer's disease. The distribution of the tangles in the central nervous system as a whole and also within many individual neurons corresponded fairly closely with that of the abnormal storage material. Both the tangles and the storage material extended into, and distended, the proximal parts of many dendrites and axons. No A4/ß protein, either in the form of plaques or in the walls of blood vessels, was detected in any of the cases. Our findings suggest that neurofibrillary tangles are a common feature of Niemann-Pick disease type C and that their formation may be a reaction to the abnormal storage material.
Niemann-Pick disease type C; neurofibrillary tangles; paired helical filaments; tau protein
Received July 13, 1994. Revised September 29, 1994. Accepted October 10, 1994.
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