2022
Reply to: Letter to editor on the article “Choice of PD-L1 immunohistochemistry assay influences clinical eligibility for gastric cancer immunotherapy”
Yeong J, Teo C, Tay R, Tan B, Chan Y, Smyth E, Sundar R. Reply to: Letter to editor on the article “Choice of PD-L1 immunohistochemistry assay influences clinical eligibility for gastric cancer immunotherapy”. Gastric Cancer 2022, 25: 1133-1135. PMID: 36152122, DOI: 10.1007/s10120-022-01343-4.Peer-Reviewed Original ResearchChoice of PD-L1 immunohistochemistry assay influences clinical eligibility for gastric cancer immunotherapy
Yeong J, Lum H, Teo C, Tan B, Chan Y, Tay R, Choo J, Jeyasekharan A, Miow Q, Loo L, Yong W, Sundar R. Choice of PD-L1 immunohistochemistry assay influences clinical eligibility for gastric cancer immunotherapy. Gastric Cancer 2022, 25: 741-750. PMID: 35661944, PMCID: PMC9226082, DOI: 10.1007/s10120-022-01301-0.Peer-Reviewed Original ResearchMeSH KeywordsB7-H1 AntigenBiomarkers, TumorCross-Sectional StudiesHumansImmunohistochemistryImmunotherapyStomach NeoplasmsConceptsCombined positive scorePD-L1 combined positive scoreTumor proportion scorePD-L1Gastric cancerImmune cellsPD-L1 immunohistochemistry assaysProgrammed death-ligand 1Resection of gastric cancerStandard-of-care treatmentBackgroundImmune checkpoint inhibitorsGastric cancer immunotherapyPD-L1 positivityPD-L1 scoringPD-L1 immunohistochemistryDeath-ligand 1Metastatic gastric cancerPD-L1-positive samplesInter-assay concordanceCheckpoint inhibitorsDako 22C3ICI therapyCross-sectional studyCancer immunotherapyPatient selection
2020
Profiling of gastric cancer cell-surface markers to achieve tumour–normal discrimination
Toh J, Hoppe M, Thakur T, Yang H, Tan K, Pang B, Ho S, Roy R, Ho K, Yeoh K, Tan P, Sundar R, Jeyasekharan A. Profiling of gastric cancer cell-surface markers to achieve tumour–normal discrimination. BMJ Open Gastroenterology 2020, 7: e000452. PMID: 32816956, PMCID: PMC7437876, DOI: 10.1136/bmjgast-2020-000452.Peer-Reviewed Original ResearchMeSH KeywordsAdenocarcinomaAntigens, CDAntigens, Tumor-Associated, CarbohydrateCA-19-9 AntigenCarcinoembryonic AntigenCell Adhesion MoleculesClaudin-4ClaudinsEpithelial Cell Adhesion MoleculeEvaluation Studies as TopicExome SequencingGenomicsGPI-Linked ProteinsHumansImmunohistochemistryMembrane ProteinsROC CurveSensitivity and SpecificitySingaporeStomach NeoplasmsUp-RegulationConceptsWhole-transcriptome sequencingCell surface markersMultispectral immunohistochemistryPutative cell surface proteinGastric cancerNormal tissuesMatched normal samplesCA72-4Cell surface proteinsTumor tissuesLive imaging approachesAnalysis of cell surface markersMolecular profiling of cancersHighest diagnostic validityIdentification of tumor tissueTranscriptome sequencingCancer Genome AtlasProfile of cancerProtein transcriptsCancer cell surface markersCA19-9Genome AtlasDifferentiated tumorsTissue microarrayTCGA data
2018
Transcriptional analysis of immune genes in Epstein–Barr virus-associated gastric cancer and association with clinical outcomes
Sundar R, Qamra A, Tan A, Zhang S, Ng C, Teh B, Lee J, Kim K, Tan P. Transcriptional analysis of immune genes in Epstein–Barr virus-associated gastric cancer and association with clinical outcomes. Gastric Cancer 2018, 21: 1064-1070. PMID: 29915957, DOI: 10.1007/s10120-018-0851-9.Peer-Reviewed Original ResearchMeSH KeywordsAdultAgedB7-H1 AntigenBiomarkers, TumorCD8 AntigensCohort StudiesDisease-Free SurvivalEpstein-Barr Virus InfectionsFemaleGene Expression ProfilingGene Expression Regulation, NeoplasticHerpesvirus 4, HumanHumansImmunohistochemistryLymphocytes, Tumor-InfiltratingMaleMiddle AgedPerforinProgrammed Cell Death 1 ReceptorStomach NeoplasmsConceptsPD-L1PD-L1highPD-L1lowEBVaGC samplesImmune-related genesAssociated with worse disease-free survivalGastric cancerPD-L1 immunohistochemistry expressionPD-L1 transcript expressionExpression of PD-L1Levels of PD-L1Epstein-Barr virus-associated gastric cancerTumour-infiltrating lymphocyte patternPD-L1 expressionPD-L1 immunohistochemistryPrimary tumor resectionDisease-free survivalAssociated with higher expressionCases of EBVaGCGastric cancer patientsEBV-negative samplesSamsung Medical CentreAsian Cancer Research GroupImmune genesCancer Research Group
2016
Phase Ib/II randomized, open-label study of doxorubicin and cyclophosphamide with or without low-dose, short-course sunitinib in the pre-operative treatment of breast cancer
Wong A, Sundar R, Wang T, Ng T, Zhang B, Tan S, Soh T, Pang A, Tan C, Ow S, Wang L, Mogro J, Ho J, Jeyasekharan A, Huang Y, Thng C, Chan C, Hartman M, Iau P, Buhari S, Goh B, Lee S. Phase Ib/II randomized, open-label study of doxorubicin and cyclophosphamide with or without low-dose, short-course sunitinib in the pre-operative treatment of breast cancer. Oncotarget 2016, 7: 64089-64099. PMID: 27577069, PMCID: PMC5325427, DOI: 10.18632/oncotarget.11596.Peer-Reviewed Original ResearchMeSH KeywordsAdultAgedAnthracyclinesAntineoplastic AgentsBiomarkers, TumorBreast NeoplasmsContrast MediaCyclophosphamideDisease-Free SurvivalDoxorubicinDrug Administration ScheduleFemaleHumansImmunohistochemistryIndolesMagnetic Resonance ImagingMiddle AgedNeoadjuvant TherapyPreoperative PeriodPyrrolesSunitinibTreatment OutcomeConceptsPathological complete responseVascular normalization indexChemotherapy dose delaysLow-doseDose delaysDCE-MRIPhase IbDecreased lymphatic vessel densityIntra-tumoral drug deliveryPathologic complete response rateRecommended phase II dosePhase II doseDose of sunitinibTreatment of breast cancerDCE-MRI parametersPre-operative treatmentAnthracycline-based chemotherapyOpen-label studyRandomized to chemotherapyTumor vessel normalizationLymphatic vessel densityEnhance chemotherapy efficacyBreast cancer patientsFunctional imaging biomarkersPharmacodynamic evidence