Hongene Biotech Corporation’s Post

📢 Researchers from UC San Diego have revealed the pathway leading to protein aggregation in the cytoplasm of motor neurons in individuals with amyotrophic lateral sclerosis (ALS). ALS is a progressive #neurodegenerativedisease characterized by the progressive loss of motor neurons. The buildup of TDP-43, a nucleus-bound gene-expression regulatory protein, is a sign of ALS. The aggregation of TDP-43 in the cytoplasm is caused by abnormal nuclear accumulation of charged multivesicular body protein 7 (CHMP7). In this current study, researchers investigated the possible triggers for CHMP7 aggregation in the nucleus. They used a CRISPR-based microRaft followed by gRNA identification (CRaft-ID) to discover 55 RNA-binding proteins that influence CHMP7 localization. Specifically, they identified an RNA-splicing associated protein called SmD1. They employed IP-MS and enhanced CLIP analyses to reveal CHMP7’s interactions with SmD1. When inhibited, SmD1 significantly increased CHMP7 aggregation in the nucleus. Boosting SmD1 expression kept CHMP7 in the cytoplasm, preserving nucleoporins and keeping TDP-43 in the nucleus for proper gene regulation. Since SMN dysfunction is implicated in spinal muscular dystrophy, and therapeutics like risdiplam exist for this disorder, the researchers are exploring whether risdiplam could be repurposed to treat ALS by enhancing the SMN complex and preventing CHMP7 nuclear buildup. The study suggests that the SMN complex plays a crucial role in the onset of ALS, paving the way for repurposing existing medications or developing new therapeutics for ALS. Congratulations to all contributors🎉 Gene Yeo Norah Al-Azzam, PhD Image credit to original article: https://lnkd.in/epdXq95p #RNA #neurobiology #RNAtherapeutics #ALS #neurodegenerative #geneedtiting

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