2024
Positive selection CRISPR screens reveal a druggable pocket in an oligosaccharyltransferase required for inflammatory signaling to NF-κB
Lampson B, Ramίrez A, Baro M, He L, Hegde M, Koduri V, Pfaff J, Hanna R, Kowal J, Shirole N, He Y, Doench J, Contessa J, Locher K, Kaelin W. Positive selection CRISPR screens reveal a druggable pocket in an oligosaccharyltransferase required for inflammatory signaling to NF-κB. Cell 2024, 187: 2209-2223.e16. PMID: 38670073, PMCID: PMC11149550, DOI: 10.1016/j.cell.2024.03.022.Peer-Reviewed Original ResearchConceptsWhole-genome CRISPR-Cas9 screenCRISPR-Cas9 screensCryoelectron microscopy studiesCell surface localizationLipopolysaccharide receptor Toll-like receptor 4OST complexToll-like receptor 4CRISPR screensNF-kBCatalytic subunitN-glycosylationActivate NF-kBBase editorsUncompetitive inhibition mechanismNGI-1Molecular mechanismsCatalytic siteLPS-treated cellsOligosaccharyltransferaseDruggable pocketSTT3AReceptor Toll-like receptor 4Drug mechanism of actionStructural studiesInflammatory signaling
2019
Oligosaccharyltransferase Inhibition Reduces Receptor Tyrosine Kinase Activation and Enhances Glioma Radiosensitivity
Baro M, Sambrooks C, Quijano A, Saltzman WM, Contessa J. Oligosaccharyltransferase Inhibition Reduces Receptor Tyrosine Kinase Activation and Enhances Glioma Radiosensitivity. Clinical Cancer Research 2019, 25: 784-795. PMID: 29967251, PMCID: PMC6314911, DOI: 10.1158/1078-0432.ccr-18-0792.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAntineoplastic AgentsCell Cycle CheckpointsCell Line, TumorCell SurvivalDisease Models, AnimalDose-Response Relationship, DrugDose-Response Relationship, RadiationErbB ReceptorsGliomaHexosyltransferasesHumansMembrane ProteinsMiceRadiation ToleranceRadiation-Sensitizing AgentsReceptor Protein-Tyrosine KinasesSignal TransductionXenograft Model Antitumor AssaysConceptsNGI-1Cell cycle arrestDNA damageReceptor tyrosine kinase activationTyrosine kinase activationReceptor tyrosine kinasesSmall molecule inhibitorsEGFR family receptorsRTK signalingRTK activationXenograft tumor growthGlycosylation stateKinase activationTumor cell radiosensitivityExpression profilesProtein NTyrosine kinaseGlioma radiosensitivityParallel signalingTumor growthFamily activationCellular radiosensitivityFamily receptorsMechanistic roleProtein levels
2018
Oligosaccharyltransferase Inhibition Overcomes Therapeutic Resistance to EGFR Tyrosine Kinase Inhibitors
Lopez Sambrooks C, Baro M, Quijano A, Narayan A, Cui W, Greninger P, Egan R, Patel A, Benes CH, Saltzman WM, Contessa JN. Oligosaccharyltransferase Inhibition Overcomes Therapeutic Resistance to EGFR Tyrosine Kinase Inhibitors. Cancer Research 2018, 78: canres.0505.2018. PMID: 30026325, PMCID: PMC6125176, DOI: 10.1158/0008-5472.can-18-0505.Peer-Reviewed Original ResearchConceptsMutant NSCLCMutant non-small cell lung cancerNon-small cell lung cancerSignificant tumor growth delayEGFR-TKI treatmentCell lung cancerTyrosine kinase inhibitor resistanceEGFR tyrosine kinase inhibitor resistanceLung cancer cell linesNGI-1Tumor growth delayEffective therapeutic targetCell linesKinase inhibitor resistanceTumor cell viabilityH1975 xenograftsCancer cell linesTKI treatmentComplex transmembrane proteinsEGFR-TKILung cancerTumor responseCell cycle arrestPreclinical modelsTherapeutic strategies