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- W2246108992 abstract "Proceedings: AACR 106th Annual Meeting 2015; April 18-22, 2015; Philadelphia, PAIntracellular delivery and endosomal escape of functional small interfering RNAs (siRNAs) remain major barriers limiting the clinical translation of RNA interference (RNAi)-based therapeutics. Recently, we demonstrated that a endosome-disruptive peptide we synthesized termed, 599, could enhance the intracellular delivery and bioavailability of siRNAs designed to target the CIP2A oncoprotein (siCIP2A) into oral cancer cells and consequently inhibit oral cancer cell invasiveness and anchorage-independent growth in vitro. Thus, to further assess the therapeutic potential of the 599 peptide in mediating RNAi-based therapeutics for oral cancer and its prospective applicability in clinical settings, the objective of the current study was to determine whether intratumoral dosing of the 599+siCIP2A complex could induce silencing of CIP2A and consequently impair tumor growth using a xenograft oral cancer mouse model. Our results demonstrated that the 599 peptide was able to protect siRNAs from degradation by serum and ribonucleases in vitro, confirming the stability of the 599+siRNA complex and its potential for in vivo utility. Moreover, 599 peptide-mediated delivery of siCIP2A to tumor tissue induced CIP2A silencing without any associated toxicity, consequently resulting in reduction of the mitotic index and significant inhibition of tumor growth. Together, these data suggest that the 599 peptide carrier could be a clinically effective mediator of RNAi-based cancer therapeutics.Citation Format: Angela Alexander-Bryant, Anca Dumitriu, Christopher Attaway, Hong Yu, Andrew Jakymiw. Fusogenic-oligoarginine peptide-mediated silencing of the CIP2A oncogene suppresses oral cancer tumor growth in vivo. [abstract]. In: Proceedings of the 106th Annual Meeting of the American Association for Cancer Research; 2015 Apr 18-22; Philadelphia, PA. Philadelphia (PA): AACR; Cancer Res 2015;75(15 Suppl):Abstract nr LB-106. doi:10.1158/1538-7445.AM2015-LB-106" @default.
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- W2246108992 date "2015-08-01" @default.
- W2246108992 modified "2023-09-25" @default.
- W2246108992 title "Abstract LB-106: Fusogenic-oligoarginine peptide-mediated silencing of the CIP2A oncogene suppresses oral cancer tumor growth in vivo" @default.
- W2246108992 doi "https://doi.org/10.1158/1538-7445.am2015-lb-106" @default.
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