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Genomically informed small-molecule drugs overcome resistance to a sustained-release formulation of an engineered death receptor agonist in patient-derived tumor …

SCIENCE ADVANCES. 2019; 
Mandana T. Manzari, Grace R. Anderson, Kevin H. Lin, Ryan S. Soderquist, Merve Çakir, Mitchell Zhang, Chandler E. Moore, Rachel N. Skelton, Maréva Fèvre, Xinghai Li, Joseph J. Bellucci, Suzanne E. Wardell, Simone A. Costa, Kris C. Wood and Ashutosh Chilkoti
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Recombinant Proteins All proteins used for the in vivo studies were endotoxin purified using Pall Mustang E Membrane sterile/endotoxin filters and tested using the GenScript ToxinSensor Single Test Kit endotoxin test to ensure levels below the U.S. Food and Drug Administration–recommended limit of 0.25 EU/ml (47). Get A Quote

摘要

Extrinsic pathway agonists have failed repeatedly in the clinic for three core reasons: Inefficient ligand-induced receptor multimerization, poor pharmacokinetic properties, and tumor intrinsic resistance. Here, we address these factors by (i) using a highly potent death receptor agonist (DRA), (ii) developing an injectable depot for sustained DRA delivery, and (iii) leveraging a CRISPR-Cas9 knockout screen in DRA-resistant colorectal cancer (CRC) cells to identify functional drivers of resistance. Pharmacological blockade of XIAP and BCL-XL by targeted small-molecule drugs strongly enhanced the antitumor activity of DRA in CRC cell lines. Recombinant fusion of the DRA to a thermally responsive elastin-like po... More

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