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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
Neuronal intranuclear inclusions (NIIs) are a pathological hallmark of CAG repeat diseases. To elucidate the influence of NII formation on intranuclear substructures, we investigated the relationship of NIIs with nuclear bodies in brains of dentatorubral-pallidoluysian atrophy and Machado-Joseph disease. In both diseases, promyelocytic leukemia protein, a major component of the promyelocytic leukemia protein nuclear bodies, altered the normal distribution and was rearranged around NII, forming a single capsular structure. We further demonstrated that NIIs were present in close contact with coiled bodies, a highly dynamic domain that may be involved in the biogenesis of small nuclear ribonucleoproteins. The preferential association of intranuclear polyglutamine aggregates with coiled bodies was also confirmed in the dentatorubral-pallidoluysian atrophytransgenic mouse brain and culture cells expressing mutant atrophin-1. The results suggest that the interaction between NIIs and nuclear bodies may play a role in the pathogenesis of CAG repeat diseases.[1]
