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• W2891665599 endingPage "10245" @default.
• W2891665599 startingPage "10225" @default.
• W2891665599 abstract "RNase H1-dependent, phosphorothioate-modified antisense oligonucleotides (PS-ASOs) can enter cells through endocytic pathways and need to be released from the membrane-enclosed organelles, a limiting step for antisense activity. Accumulating evidence has suggested that productive PS-ASO release mainly occurs from late endosomes (LEs). However, how PS-ASOs escape from LEs is not well understood. Here, we report that upon PS-ASO incubation, COPII vesicles, normally involved in ER–Golgi transport, can re-locate to PS-ASO-containing LEs. Reduction of COPII coat proteins significantly decreased PS-ASO activity, without affecting the levels of PS-ASO uptake and early-to-late endosome transport, but caused slower PS-ASO release from LEs. COPII co-localization with PS-ASOs at LEs does not require de novo assembly of COPII at ER. Interestingly, reduction of STX5 and P115, proteins involved in tethering and fusion of COPII vesicles with Golgi membranes, impaired COPII re-localization to LEs and decreased PS-ASO activity. STX5 can re-locate to LEs upon PS-ASO incubation, can bind PS-ASOs, and the binding appears to be required for this pathway. Our study reveals a novel release pathway in which PS-ASO incubation causes LE re-localization of STX5, which mediates the recruitment of COPII vesicles to LEs to facilitate endosomal PS-ASO release, and identifies another key PS-ASO binding protein." @default.
• W2891665599 created "2018-09-27" @default.
• W2891665599 creator A5011045240 @default.
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• W2891665599 creator A5077755519 @default.
• W2891665599 date "2018-09-20" @default.
• W2891665599 modified "2023-09-26" @default.
• W2891665599 title "COPII vesicles can affect the activity of antisense oligonucleotides by facilitating the release of oligonucleotides from endocytic pathways" @default.
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• W2891665599 doi "https://doi.org/10.1093/nar/gky841" @default.
• W2891665599 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6212795" @default.
• W2891665599 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30239896" @default.
• W2891665599 hasPublicationYear "2018" @default.
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