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- W2997334145 abstract "// Caroline K. Søgaard 1 , 2 , Anala Nepal 1 , Voin Petrovic 1 , Animesh Sharma 3 , Nina-Beate Liabakk 1 , Tonje S. Steigedal 1 and Marit Otterlei 1 , 2 , 4 1 Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology (NTNU), Trondheim, Norway 2 Clinic of Surgery, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway 3 Proteomics and Modomics Experimental Core Facility (PROMEC), NTNU, Trondheim, Norway 4 APIM Therapeutics A/S, Trondheim, Norway Correspondence to: Marit Otterlei, email: marit.otterlei@ntnu.no Keywords: APIM; multi-targeting therapy; signaling pathways; autophagy; cancer Received: May 30, 2019 Accepted: September 24, 2019 Published: December 31, 2019 ABSTRACT Receptor tyrosine kinases (RTKs), such as HER2 and/or EGFR are important therapeutic targets in multiple cancer cells. Low and/or short response to targeted therapies are often due to activation of compensatory signaling pathways, and therefore a combination of kinase inhibitors with other anti-cancer therapies have been proposed as promising strategies. PCNA is recently shown to have non-canonical cytosolic roles, and targeting PCNA with a cell-penetrating peptide containing the PCNA-interacting motif APIM is shown to mediate changes in central signaling pathways such as PI3K/Akt and MAPK, acting downstream of multiple RTKs. In this study, we show how targeting PCNA increased the anti-cancer activity of EGFR/HER2/VEGFR inhibition in vitro as well as in vivo. The combination treatment resulted in reduced tumor load and increased the survival compared to either single agent treatments. The combination treatment affected multiple cellular signaling responses not seen by EGFR/HER2/VEGFR inhibition alone, and changes were seen in pathways determining protein degradation, ER-stress, apoptosis and autophagy. Our results suggest that targeting the non-canonical roles of PCNA in cellular signaling have the potential to improve targeted therapies." @default.
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- W2997334145 date "2019-12-31" @default.
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- W2997334145 title "Targeting the non-canonical roles of PCNA modifies and increases the response to targeted anti-cancer therapy" @default.
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- W2997334145 doi "https://doi.org/10.18632/oncotarget.27267" @default.
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