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Learn MoreLamins, the major structural proteins within the nuclear lamina, are crucial for the functionality of cellular nucleus and their alterations are involved in the so-called laminopathies. We previously found that Huntingtons disease (HD), a hereditary neurodegenerative disorder caused by an expansion of a CAG repeat in the huntingtin (htt) gene, courses with increased lamin B protein levels in specific brain regions in both mouse models and patients. We now show that these changes are mostly restricted to lamin B1, occur in striatal medium-sized spiny neurons and CA1 hippocampal neurons, and are accompanied by altered nuclear morphology, nucleocytoplasmic transport disruption and un-structuring of lamin-associated chromatin domains. Normalization of lamin B1 levels by betulinic acid administration in the R6/1 mouse model of HD results in beneficial restoring of nuclear lamina homeostasis and prevention of motor and cognitive dysfunction, opening a window for a new therapeutic approach for HD and other B1-type laminophaties. SOURCE: Enrique Blanco (enrique.blanco@crg.eu) - Epigenetic Events in Cancer (L. Di Croce's lab) Center for Genomic Regulation (CRG)
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