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- W2916780874 abstract "Tetraspanin protein CD151 has typically been studied as binding partner and functional regulator of laminin-binding integrins. However, we show here that CD151 supports anti-cancer drug resistance independent of integrins. CD151 ablation sensitized multiple tumor cell types to several anti-cancer drugs (e.g., gefitinib and camptothecin), thus increasing apoptosis, as seen using cleaved caspase-3, cleaved PARP (poly (ADP-ribose) polymerase), annexin V, and propidium iodide staining assays. Drug sensitization due to CD151 ablation is integrin-independent, because, (1) effects occurred in cells when integrins were unengaged with ligand, (2) integrin ablation (α3 and α6 subunits) did not mimic effects of CD151 ablation, (3) the CD151QRD mutant, with diminished integrin association, and CD151WT (unmutated CD151) similarly reconstituted drug protection, and (4) treatment with anti-cancer drugs selectively upregulated intracellular nonintegrin-associated CD151 (NIA-CD151), consistent with its role in drug resistance. Together, these results suggest that upregulated CD151 expression may support not only typical integrin-dependent functions, but also integrin-independent survival of circulating (and possibly metastatic) cancer cells during anti-cancer drug therapy." @default.
- W2916780874 created "2019-03-02" @default.
- W2916780874 creator A5044165924 @default.
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- W2916780874 date "2019-02-18" @default.
- W2916780874 modified "2023-10-12" @default.
- W2916780874 title "Integrin-independent support of cancer drug resistance by tetraspanin CD151" @default.
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- W2916780874 doi "https://doi.org/10.1007/s00018-019-03014-7" @default.
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