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• W3130015275 endingPage "1272" @default.
• W3130015275 startingPage "1261" @default.
• W3130015275 abstract "The ability for biologics to access intracellular targets hinges on the translocation of active, unmodified proteins. This is often achieved using nanoscale formulations, which enter cells through endocytosis. This uptake mechanism often limits the therapeutic potential of the biologics, as the propensity of the nanocarrier to escape the endosome becomes the key determinant. To appropriately evaluate and compare competing delivery systems of disparate compositions, it is therefore critical to assess endosomal escape efficiencies. Unfortunately, quantitative tools to assess endosomal escape are lacking, and standard approaches often lead to an erroneous interpretation of cytosolic localization. In this study we use a split-complementation endosomal escape (SEE) assay to evaluate levels of cytosolic caspase-3 following delivery by polymer nanogels and mesoporous silica nanoparticles. In particular, we use SEE as a means to enable the systematic investigation of the effect of polymer composition, polymer architecture (random vs block), hydrophobicity, and surface functionality. Although polymer structure had little influence on endosomal escape, nanogel functionalization with cationic and pH-sensitive peptides significantly enhanced endosomal escape levels and, further, significantly increased the amount of nanogel per endosome. This work serves as a guide for developing an optimal caspase-3 delivery system, as this caspase-3 variant can be easily substituted for a therapeutic caspase-3 cargo in any system that results in cytosolic accumulation and cargo release. In addition, these data provide a framework that can be readily applied to a wide variety of protein cargos to assess the independent contributions of both uptake and endosomal escape of a wide range of protein delivery vehicles." @default.
• W3130015275 created "2021-03-01" @default.
• W3130015275 creator A5004556923 @default.
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• W3130015275 creator A5071204998 @default.
• W3130015275 creator A5089082573 @default.
• W3130015275 date "2021-02-16" @default.
• W3130015275 modified "2023-10-18" @default.
• W3130015275 title "Evaluating Endosomal Escape of Caspase-3-Containing Nanomaterials Using Split GFP" @default.
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• W3130015275 doi "https://doi.org/10.1021/acs.biomac.0c01767" @default.
• W3130015275 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8477791" @default.
• W3130015275 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33591168" @default.
• W3130015275 hasPublicationYear "2021" @default.
• W3130015275 type Work @default.
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