Abstract
Elucidating resistance mechanisms for therapeutic monoclonal antibodies (MAbs) is challenging, because they are difficult to study in non-human models. We therefore developed a strategy to genetically map in vitro drug sensitivity, identifying genes that alter responsiveness to rituximab, a therapeutic anti-CD20 MAb that provides significant benefit to patients with B-cell malignancies. We discovered novel loci with genome-wide mapping analyses and functionally validated one of these genes, CBLB, which causes rituximab resistance when knocked down in lymphoma cells. This study demonstrates the utility of genome-wide mapping to discover novel biological mechanisms of potential clinical advantage.
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Acknowledgements
This work was supported a Mentored Research Scholar Grant in Applied and Clinical Research (MSRG-12-086-01-TBG) from the American Cancer Society, an R01 Grant (5R01 CA185372) from the National Cancer Institute to KLR and an RO1 (5R01CA161608) from the National Cancer Institute to AMR and HLM.
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Jack, J., Small, G., Brown, C. et al. Gene expression and linkage analysis implicate CBLB as a mediator of rituximab resistance. Pharmacogenomics J 18, 467–473 (2018). https://doi.org/10.1038/tpj.2017.41
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DOI: https://doi.org/10.1038/tpj.2017.41