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An unmet need exists for effective, well-tolerated, and convenient treatment (tx) options in patients (pts) with high-risk relapsed/refractory (R/R) follicular lymphoma (FL), including double refractory pts (refractory to anti-CD20 tx and an alkylating agent) and pts with disease progression within 2 y of first-line (1L) immunochemotherapy (POD24). Epcoritamab, a subcutaneous (SC) CD3xCD20 bispecific antibody, is approved in the US for adults with R/R diffuse large B-cell lymphoma (DLBCL), not otherwise specified, including DLBCL arising from indolent lymphoma, and high-grade B-cell lymphoma after ≥2 lines of systemic tx. We present initial results from the FL dose-expansion cohort of the EPCORE™ NHL-1 trial (NCT03625037; phase 1/2).

Apoptosis induction by death receptor (DR)-specific agonistic antibodies is a potentially effective antitumor therapy. Nonetheless, to date, all conventional DR-targeting antibodies that induce apoptosis via FcγR-dependent DR clustering failed to show clinical efficacy. HexaBody-DR5/DR5 (GEN1029) has been developed to overcome full FcγR dependence. HexaBody-DR5/DR5 is a mixture of 2 noncompeting DR5-specific immunoglobulin G1 (IgG1) antibodies, each with an E430G mutation in the Fc domain. This mutation enhances Fc-Fc interactions, resulting in antibody hexamerization, followed by FcγR-independent clustering of DR5 molecules. This unique combination of dual epitope targeting and increased IgG hexamerization resulted in potent preclinical antitumor activity in various solid cancers. In this study, we explored the preclinical activity of HexaBody-DR5/DR5 in multiple myeloma (MM), because MM cells are known to express DR5. In bone marrow samples from 48 MM patients, HexaBody-DR5/DR5 induced potent cytotoxicity of primary MM cells. Importantly, HexaBody-DR5/DR5 mediated the highest cytotoxic activity in samples from relapsed/refractory MM patients, including those who are refractory to daratumumab. This improved cytotoxic activity was observed only in patients who received their last anti-MM treatment <1 month ago, suggesting that anti-MM drugs sensitized MM cells to HexaBody-DR5/DR5. Supporting this, bortezomib combined with HexaBody-DR5/DR5 synergistically increased cytotoxicity in MM cells in 7 of 11 newly diagnosed patients. Lenalidomide also synergized with HexaBody-DR5/DR5, but only via its immunomodulatory effects, presumably by enhancing the antibody-dependent cellular cytotoxicity activity of HexaBody-DR5/DR5. Daratumumab showed additive effects when combined with HexaBody-DR5/DR5. In conclusion, the results of this preclinical study indicate a therapeutic potential for HexaBody-DR5/DR5, especially in recently treated relapsed/refractory MM patients.

Novel strategies, such as chemosensitization with targeted agents, that build on the success of standard immunochemotherapy show promise for the treatment of non-Hodgkin lymphoma (NHL). Here, we report a phase 1b study investigating dose escalation of the BCL2 inhibitor, venetoclax, in combination with rituximab or obinutuzumab and cyclophosphamide, doxorubicin, vincristine, and prednisone (R-/G-CHOP) chemotherapy in B-cell NHL. Objectives included safety assessment and determination of a recommended phase 2 dose (RP2D). Fifty-six patients were enrolled, most with follicular lymphoma (43%) or diffuse large B-cell lymphoma (DLBCL; 32%). Dose-limiting toxicities were reported in 3/14 patients at the first venetoclax dose (200 mg/d), after which dosing was changed from daily to 10 days per cycle and escalated to 800 mg. A further reduction to 5 days per cycle occurred at the 800-mg dose level in the G-CHOP arm. Cytopenias were predominant among grade 3/4 events and reported at a higher rate than expected, particularly in the G-CHOP arm; however, safety was manageable. Overall response rates were 87.5% (R-CHOP and G-CHOP combinations); complete response (CR) rates were 79.2% and 78.1%, respectively. Most double-expressor (BCL2+and MYC+) DLBCL patients (87.5%; n = 7/8) achieved CR. Although the maximum tolerated dose was not reached, the RP2D for venetoclax with R-CHOP was established at 800 mg days 4 to 10 of cycle 1 and days 1 to 10 of cycles 2 to 8; higher doses were not explored, and this dosing schedule demonstrated an acceptable safety profile. This regimen is subsequently being evaluated in first-line DLBCL in the phase 2 portion of the study. This trial was registered at www.clinicaltrials.govas #NCT02055820.

Introduction

Background:Despite recent therapeutic advances, an unmet need exists for efficacious, well-tolerated, and convenient treatment (tx) options for patients (pts) with relapsed/refractory (R/R) follicular lymphoma (FL). In particular, pts with high-risk disease, including those refractory to both anti-CD20 tx and an alkylating agent (double refractory) and those with disease progression within 2 y of first-line (1L) immunochemotherapy (POD24), require more effective options. Epcoritamab, a subcutaneous (SC) CD3xCD20 bispecific antibody, was recently approved by the US FDA for the tx of adults with R/R diffuse large B-cell lymphoma (DLBCL), not otherwise specified, including DLBCL arising from indolent lymphoma, and high-grade B-cell lymphoma after ≥2 lines of systemic tx. Here we present initial results from the FL dose-expansion cohort of the EPCORE™ NHL-1 trial (NCT03625037; phase 1/2).

Background:

Background:Epcoritamab SC, a CD3xCD20 T-cell-engaging bispecific antibody, has recently been approved by the US FDA for the treatment of adults with relapsed/refractory (R/R) diffuse large B-cell lymphoma (DLBCL), not otherwise specified, including DLBCL arising from indolent lymphoma, and high-grade B-cell lymphoma after ≥2 lines of systemic therapy. As a single agent, epcoritamab SC has demonstrated deep, durable responses with a manageable safety profile in patients with R/R large B-cell lymphoma in the expansion portion of the phase 1/2 EPCORE ™ NHL-1 trial (NCT03625037). Cytokine release syndrome (CRS) events in the dose expansion part of the trial were primarily low grade (49.7% overall; 31.8% grade [G] 1, 15.3% G2, 2.5% G3); timing was predictable, and the majority of events occurred following the first full dose at cycle 1 day 15 (C1D15). To mitigate CRS in dose expansion, subcutaneous administration, step-up dosing, and premedication, including prednisolone, were used. Here, we present preliminary results from a DLBCL optimization cohort of the EPCORE NHL-1 trial that further investigates mitigating the risk of CRS in patients treated with epcoritamab SC monotherapy.

We investigated whether the outcome prediction of patients with aggressive B-cell lymphoma can be improved by combining clinical, molecular genotype, and radiomics features. MYC, BCL2, and BCL6rearrangements were assessed using fluorescence in situ hybridization. Seventeen radiomics features were extracted from the baseline positron emission tomography–computed tomography of 323 patients, which included maximum standardized uptake value (SUVmax), SUVpeak, SUVmean, metabolic tumor volume (MTV), total lesion glycolysis, and 12 dissemination features pertaining to distance, differences in uptake and volume between lesions, respectively. Logistic regression with backward feature selection was used to predict progression after 2 years. The predictive value of (1) International Prognostic Index (IPI); (2) IPI plus MYC; (3) IPI, MYC, and MTV; (4) radiomics; and (5) MYCplus radiomics models were tested using the cross-validated area under the curve (CV-AUC) and positive predictive values (PPVs). IPI yielded a CV-AUC of 0.65 ± 0.07 with a PPV of 29.6%. The IPI plus MYCmodel yielded a CV-AUC of 0.68 ± 0.08. IPI, MYC, and MTV yielded a CV-AUC of 0.74 ± 0.08. The highest model performance of the radiomics model was observed for MTV combined with the maximum distance between the largest lesion and another lesion, the maximum difference in SUVpeakbetween 2 lesions, and the sum of distances between all lesions, yielding an improved CV-AUC of 0.77 ± 0.07. The same radiomics features were retained when adding MYC(CV-AUC, 0.77 ± 0.07). PPV was highest for the MYCplus radiomics model (50.0%) and increased by 20% compared with the IPI (29.6%). Adding radiomics features improved model performance and PPV and can, therefore, aid in identifying poor prognosis patients.

Because of severe bleeding complications, patients with acute promyelocytic leukemia (APL) have to be treated with all-transretinoic acid immediately following diagnosis. In addition to morphology, flow cytometry contributes to a rapid detection of APL according to phenotypic characteristics of leukemic cells. In some patients, these analyses are inconclusive or even contradictory to diagnosis. Previously, we showed the clinical and functional impact of class II–associated invariant chain peptide (CLIP) in acute myeloid leukemia (AML). This study focuses on the analysis of CLIP expression on leukemic cells to characterize HLA-DR–negative AML, including APL. We demonstrate exclusive and significant CLIP expression in all cases of typical and variant APL, as compared to other HLA-DR–negative non–APL-type AML. CLIP appears to be a highly sensitive and specific flow cytometric marker, resolving discrepant identification of both genetic subgroups. Our findings show the additive value of CLIP analysis for a fast and unequivocal recognition of APL by flow cytometry in conjunction with morphology.

Myelodysplastic syndromes (MDS) are a group of clonal disorders of the bone marrow characterized by peripheral cytopenias. Standard treatment in low- and intermediate-I–risk MDS is supportive therapy consisting of regular transfusions and growth factors, that is, erythropoietin (Epo) and granulocyte-colony-stimulating factor (G-CSF). Because flow cytometric analysis of MDS bone marrow samples can identify clinically relevant subgroups regarding transfusion dependency and disease progression, we addressed the question whether flow cytometry (FCM) was instrumental in predicting response. In 46 patients with low- and intermediate-I–risk MDS that were treated with Epo/G-CSF, low Epo level and low transfusion need were associated with response to Epo/G-CSF. Interestingly, aberrant phenotype of myeloblasts identified nonresponders among patients with the greatest response probability according to the predictive model of Hellström-Lindberg et al. Moreover, aberrant FCM of myeloblasts acted as a significant biomarker for treatment failure in multivariate analysis. A new predictive model based on the basis FCM combined with previously validated Epo levels is proposed defining 3 subgroups with 94%, 17%, and 11% response probability. In conclusion, FCM may add significantly to well-known predictive parameters in selecting MDS patients eligible for Epo/G-CSF treatment. This is of relevance regarding prevention of treatment failure.

Introduction:Despite advances in the treatment of B-cell non-Hodgkin lymphoma (B-NHL), more efficacious, less toxic, off-the-shelf therapies are needed for patients (pts) with relapsed or refractory (R/R) disease. Epcoritamab is a novel, subcutaneously (SC) administered bispecific antibody (bsAb) that simultaneously binds to CD3 on T cells and CD20 on B cells, inducing activation and cytotoxic activity of T cells for killing of target lymphoma cells. In an open-label, phase 1/2 trial (NCT03625037), initial data demonstrated an encouraging safety profile and potent single-agent clinical activity, even at low doses, in heavily pretreated pts with R/R B-NHL (Hutchings M. EHA 2020, Poster EP1218). Herein, we present updated dose-escalation data, including initial results for the 48-mg recommended phase 2 dose (RP2D) and for pts with mantle cell lymphoma (MCL).

Hutchings: Celgene, Genmab, Janssen, Novartis, F. Hoffmann-La Roche, Takeda: Research Funding; Genmab, F. Hoffmann-La Roche, Takeda: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees. Mous:Gilead Sciences: Consultancy, Honoraria, Research Funding; Janssen-Cilag: Consultancy, Honoraria, Research Funding; Bristol-Myers Squibb: Honoraria; Celgene: Honoraria; Sandoz: Honoraria; Takeda: Honoraria; MSD Brazil: Honoraria; Roche: Honoraria; AbbVie: Honoraria. Clausen:AbbVie: Other: Travel expenses. Johnson:Incyte: Honoraria; Kite Pharma: Honoraria; Kymera: Honoraria; MorphoSys: Honoraria; Takeda: Honoraria; Genmab: Honoraria; Celgene: Honoraria; Bristol-Myers: Honoraria; Oncimmune: Consultancy; Janssen: Consultancy; Oncimmune: Consultancy; Epizyme: Consultancy, Research Funding; Janssen: Consultancy; Boehringer Ingelheim: Consultancy; Epizyme: Consultancy, Research Funding; Novartis: Honoraria. Linton:Takeda: Honoraria; Celgene: Membership on an entity's Board of Directors or advisory committees; Karyopharm: Membership on an entity's Board of Directors or advisory committees; Gilead: Membership on an entity's Board of Directors or advisory committees; Roche: Consultancy; Beigene: Membership on an entity's Board of Directors or advisory committees; Janssen: Other: Travel, accommodations, expenses ; Celgene: Other: Travel, accommodations, expenses. Chamuleau:Celgene: Membership on an entity's Board of Directors or advisory committees, Research Funding; Bristol-Myers Squibb: Research Funding; Genmab: Research Funding; Gilead: Membership on an entity's Board of Directors or advisory committees, Research Funding. Sureda Balari:Gilead/Kite: Consultancy, Honoraria; Novartis: Consultancy, Honoraria; BMS: Speakers Bureau; Celgene: Consultancy, Honoraria; Incyte: Consultancy; Janssen: Consultancy, Honoraria; Sanofi: Consultancy, Honoraria; Merck Sharpe and Dohme: Consultancy, Honoraria, Speakers Bureau; Celgene/Bristol-Myers Squibb: Consultancy, Honoraria; Takeda: Consultancy, Honoraria, Speakers Bureau; Roche: Honoraria. Cunningham:Bayer: Research Funding; AstraZeneca: Research Funding; Merrimack: Research Funding; Celgene: Research Funding; Amgen: Research Funding; Merck: Research Funding; Sanofi: Research Funding; MedImmune: Research Funding; OVIBIO: Membership on an entity's Board of Directors or advisory committees; Lilly: Research Funding; Janssen: Research Funding; Clovis Oncology: Research Funding; 4SC: Research Funding. Oliveri:Genmab: Current Employment, Current equity holder in publicly-traded company. DeMarco:Genmab: Current Employment, Current equity holder in publicly-traded company. Elliott:Genmab: Current Employment. Chen:Genmab: Current Employment. Lugtenburg:Servier: Honoraria, Research Funding; Takeda: Honoraria, Research Funding; Roche: Research Funding; Genentech: Honoraria; Genmab: Honoraria; Celgene: Honoraria; Incyte: Honoraria.Epcoritamab is an investigational agent undergoing evaluation in patients with relapsed/refractory B-cell non-Hodgkin lymphoma.

Introduction:Immune checkpoint blockade of programmed death-1 (PD-1) receptor and its ligand (PD-L1) has contributed to efficacy in many tumor types, with clinical responses observed in a proportion of patients (pts) with Hodgkin lymphoma and rare non-Hodgkin lymphoma subtypes. A recent study demonstrated that combination treatment with anti-PD-L1 and anti-CD38 agents contributed to a stronger anti-tumor immune response compared with anti-PD-L1 monotherapy. Isatuximab, an anti-CD38 monoclonal antibody, is approved for use in multiple myeloma. Cemiplimab, an anti-PD-1 monoclonal antibody, is approved for use in cutaneous squamous cell carcinoma, basal cell carcinoma, and non-small cell lung cancer.

Introduction

Introduction

Chamuleau: Gilead: Research Funding; Genmab: Research Funding; Celgene: Research Funding. Lugtenburg: Incyte: Honoraria; Regeneron: Honoraria; Genmab: Honoraria; Servier: Honoraria, Research Funding; Takeda: Honoraria, Research Funding; Celgene: Honoraria, Other: Non-financial support; Travel support; Roche: Honoraria, Research Funding. Dührsen: CPT Cellex Patient Treatment: Honoraria, Membership on an entity's Board of Directors or advisory committees; Amgen: Honoraria, Membership on an entity's Board of Directors or advisory committees. Hüttmann: Celgene: Honoraria; Gilead: Honoraria; Lead Discovery Center GmbH: Consultancy; Takeda: Honoraria, Membership on an entity's Board of Directors or advisory committees. Richter: HTG Molecular Diagnostics, Inc.: Current Employment, Research Funding. Klapper: Regeneron: Consultancy, Research Funding; Amgen: Research Funding; Roche: Consultancy, Research Funding; Takeda: Consultancy, Research Funding. Zijlstra: Takeda: Research Funding.

Carlo-Stella: ADC Therapeutics: Membership on an entity's Board of Directors or advisory committees, Research Funding; AstraZeneca: Honoraria; Bristol-Myers Squibb: Honoraria, Membership on an entity's Board of Directors or advisory committees; Incyte: Honoraria; Roche: Membership on an entity's Board of Directors or advisory committees, Research Funding; Janssen Oncology: Honoraria; Celgene: Membership on an entity's Board of Directors or advisory committees; Karyopharm Therapeutics: Membership on an entity's Board of Directors or advisory committees; Sanofi: Consultancy, Research Funding. Zinzani: TG Therapeutics Inc: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Kyowa Kirin: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Novartis: Consultancy, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Roche: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Bristol Myers Squibb: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Sandoz: Consultancy, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Celgene: Consultancy, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; ImmuneDesign: Consultancy, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Takeda: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Incyte: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Verastem: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Servier: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Janssen-Cilag: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Gilead: Consultancy, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Celltrion: Consultancy, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Merck Sharp & Dohme: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; EUSA Pharma: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; ADC Therapeutics: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; BeiGene: Consultancy, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Portola: Consultancy, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau; Sanofi: Consultancy, Membership on an entity's Board of Directors or advisory committees; Abbvie: Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau. Sureda: Novartis: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Takeda: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Other: Support for attending meetings and/or travel, Research Funding, Speakers Bureau; GSK: Consultancy, Honoraria, Speakers Bureau; Roche: Other: Support for attending meetings and/or travel; Bluebird: Membership on an entity's Board of Directors or advisory committees; Mundipharma: Consultancy; Kite, a Gilead Company: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Janssen: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Amgen: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; MSD: Consultancy, Honoraria, Speakers Bureau; BMS/Celgene: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Other: Support for attending meetings and/or travel, Speakers Bureau; Sanofi: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau. Casasnovas: TAKEDA: Consultancy, Research Funding; Gilead/Kite: Consultancy, Research Funding; BMS: Consultancy; Janssen: Consultancy; Amgen: Consultancy; ROCHE: Consultancy, Research Funding. Carpio: Regeneron, TAKEDA, Celgene, Novartis: Consultancy, Membership on an entity's Board of Directors or advisory committees, Other: Travels and accommodation. Bouabdallah: Abbvie: Honoraria; Sandoz: Consultancy, Honoraria; Kite/Gilead: Consultancy, Honoraria, Other: Travel/Accommodations/Expenses; Roche: Consultancy, Honoraria, Other: Travel/Accommodations/Expenses; Takeda: Consultancy, Honoraria, Other: Travel/Accommodations/Expenses. Cartron: Roche, Celgene-BMS: Consultancy; Danofi, Gilead, Novartis, Jansen, Roche, Celgene-BMS, Abbvie, Takeda: Honoraria. Kim: Celltrion: Research Funding; Dong-A Pharmaceutical: Research Funding; Kyowa Kirin: Research Funding; Sanofi: Research Funding; IGM Biosciences: Research Funding; Eisai: Research Funding; Johnson & Johnson: Research Funding; Roche: Research Funding. Cordoba: Incyte: Membership on an entity's Board of Directors or advisory committees; Pfizer: Research Funding; Kyowa-Kirin: Membership on an entity's Board of Directors or advisory committees; Janssen: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Kite: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; BMS: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Roche: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; ADCTherapeutics: Membership on an entity's Board of Directors or advisory committees; AbbVie: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Takeda: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau. Koh: Pfizer: Consultancy; Jassen: Honoraria; AstraZeneca: Honoraria; Novartis: Honoraria; GSK: Honoraria; Roche: Honoraria; Takeda: Honoraria. Alves: Janssen, Cilag, Gilead, Takeda, Astrazeneca, Roche, Abbvie: Consultancy, Honoraria. Chamuleau: Gilead: Research Funding; Genmab: Research Funding; Celgene: Research Funding. Lopez-Guillermo: Roche, Gilead/Kite, Celgene, Novartis, Janssen, AbbVie, Spectrum: Consultancy, Honoraria, Research Funding. Van Der Poel: Roche, Janssen, Abbvie: Honoraria. Abbadessa: Sanofi: Current Employment. Meng: Sanofi: Current Employment. Ji: Sanofi: Current Employment. Lepine: Sanofi: Other: Contractual relationship. Saleem: Sanofi: Current Employment. Ribrag: PharmaMar: Honoraria, Membership on an entity's Board of Directors or advisory committees; GSK: Research Funding; Epizyme: Honoraria, Research Funding; Servier: Consultancy, Membership on an entity's Board of Directors or advisory committees; Roche: Membership on an entity's Board of Directors or advisory committees; MSD Pharmaceuticals: Membership on an entity's Board of Directors or advisory committees; Argen-X: Research Funding; AstraZeneca: Membership on an entity's Board of Directors or advisory committees; Roche: Membership on an entity's Board of Directors or advisory committees; Incyte: Membership on an entity's Board of Directors or advisory committees; Nanostring: Membership on an entity's Board of Directors or advisory committees; Bristol Myers Squibb: Membership on an entity's Board of Directors or advisory committees; Astex Pharmaceuticals: Research Funding; Infinity Pharmaceuticals: Membership on an entity's Board of Directors or advisory committees; Gilead: Membership on an entity's Board of Directors or advisory committees.Based on the Phase III ICARIA-MM study, isatuximab (Sarclisa) is approved in a number of countries in combination with pomalidomide and dexamethasone for the treatment of adult patients with relapsed/refractory multiple myeloma who have received at least two prior therapies, including lenalidomide and a proteasome inhibitor. Based on the Phase III IKEMA study, isatuximab in combination with carfilzomib and dexamethasone is approved in the United States for the treatment of adult patients with relapsed or refractory multiple myeloma who have received one to three prior lines of therapy, and in the European Union for the treatment of adult patients with multiple myeloma who have received at least one prior therapy. Cemiplimab (Libtayo) is an anti-PD-1 antibody approved for the treatment of the following: 1) patients with metastatic cutaneous squamous cell carcinoma or locally advanced cutaneous squamous cell carcinoma who are not candidates for curative surgery or curative radiation; 2) patients with locally advanced or metastatic basal cell carcinoma previously treated with a hedgehog pathway inhibitor or for whom a hedgehog pathway inhibitor is not appropriate; and 3) patients with NSCLC and high tumor PD-L1 expression as determined by an FDA-approved test, with no EGFR, ALK, or ROS1 aberrations, and is locally advanced where patients are not candidates for surgical resection or definitive chemoradiation or metastatic.

Nijland: Roche: Research Funding; Nordic Nanovector: Research Funding; Takeda: Research Funding. Van Der Poel: Roche, Janssen, Abbvie: Honoraria. Klerk: Van Lanschot Kempen: Other: I have an investment porfolio which is managed by Van Lanschot Kempen as a portfolio manager (vermogensbeheerder). Van Lanschot Kempen invests on my behalf, and takes investment decisions on a discretionary basis. I am not involved in the investment decis. Pegtel: Exbiome BV: Current holder of individual stocks in a privately-held company; Takeda: Other: Travel compensation. Mutis: Novartis: Research Funding; ONK Therapeutics: Research Funding; Janssen: Honoraria; Takeda: Research Funding; Genmab: Research Funding. Zijlstra: Takeda: Research Funding. Kersten: BMS/Celgene: Consultancy; Kite/Gilead: Consultancy, Honoraria, Research Funding; Milteny Biotech: Consultancy; Novartis: Consultancy, Honoraria; Roche: Honoraria; Takeda: Consultancy. Chamuleau: Gilead: Research Funding; Genmab: Research Funding; Celgene: Research Funding.Nivolumab as immune checkpoint inhibitor (inhibiting PD-1) in consolidation phase for the treatment of DH/TH-HGBL patients.

In this overview, we discuss the role of class II-associated invariant chain peptide (CLIP) in acute myeloid leukemia (AML), one of the few tumors expressing HLA class II. The clinical impact, function and regulation of CLIP expression on leukemic cells is addressed, indicating its potential as immunotherapeutic target in AML.

Van Der Horst: Genmab: Other: Financial Support. Hiemstra:Genmab: Employment, Equity Ownership, Other: Warrants. de Jong:Genmab: Research Funding; BMS: Membership on an entity's Board of Directors or advisory committees; Celgene: Membership on an entity's Board of Directors or advisory committees; Takeda: Membership on an entity's Board of Directors or advisory committees. Chamuleau:Genmab: Research Funding. Zweegman:Celgene: Membership on an entity's Board of Directors or advisory committees, Research Funding; Takeda: Membership on an entity's Board of Directors or advisory committees, Research Funding; Janssen Pharmaceuticals: Membership on an entity's Board of Directors or advisory committees, Research Funding. Breij:Genmab: Employment, Other: Warrants. Roemer:Genmab: Research Funding. Mutis:Celgene: Research Funding; Janssen Research and Development: Research Funding; Onkimmune: Research Funding; Genmab: Research Funding.

Lugtenburg: Janssen Cilag: Honoraria; Roche: Consultancy, Honoraria, Research Funding, Speakers Bureau; Celgene: Consultancy, Honoraria; Servier: Consultancy, Honoraria, Research Funding; Genmab: Consultancy, Honoraria; BMS: Consultancy; Takeda: Consultancy, Honoraria, Research Funding. Mous:Bristol-Myers Squibb: Honoraria; Celgene: Honoraria; Sandoz: Honoraria; Roche: Honoraria; Abbvie: Honoraria; Takeda: Honoraria, Research Funding; Janssen Cilag: Consultancy, Honoraria; MSD: Honoraria; Gilead: Consultancy, Honoraria, Research Funding. Clausen:Abbvie: Other: Travel grant to attend ASH 2019. Johnson:Boehringer Ingelheim: Honoraria; Janssen: Consultancy, Honoraria, Research Funding; Celgene: Honoraria; Epizyme: Honoraria, Research Funding; Incyte: Honoraria; Takeda: Honoraria; Genmab: Honoraria; Bristol-Myers Squibb: Honoraria; Kite: Honoraria; Novartis: Honoraria. Rule:Janssen: Consultancy, Honoraria, Research Funding; Roche: Consultancy, Honoraria, Research Funding; Astra-Zeneca: Consultancy, Honoraria; Celgene: Consultancy, Honoraria; Pharmacyclics: Consultancy, Honoraria; Gilead: Consultancy, Honoraria; Sunesis: Consultancy, Honoraria; TG Therapeutics: Consultancy, Honoraria; Napp: Consultancy; Kite: Consultancy. Oliveri:Genmab: Employment, Equity Ownership. DeMarco:Genmab: Employment, Equity Ownership. Hiemstra:Genmab: Employment, Equity Ownership, Other: Warrants. Chen:Genmab: Employment. Azaryan:Genmab: Employment. Gupta:Genmab: Employment, Equity Ownership. Ahmadi:Genmab Inc: Employment, Other: stock and/or warrants. Hutchings:Incyte: Research Funding; Roche: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Takeda: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Novartis: Research Funding; Genmab: Membership on an entity's Board of Directors or advisory committees, Research Funding; Celgene: Research Funding; Janssen: Research Funding; Pfizer: Research Funding.

DuoBody-CD3xCD20 (GEN3013) is a novel clinical-stage CD3 bispecific antibody (bsAb) targeting CD20-positive tumor cells. GEN3013 was previously shown to induce potent T cell-mediated cytotoxicity towards B cell Non-Hodgkin lymphoma (B-NHL) cell lines in vitroand in vivo. Here, we investigated the cytotoxic activity of GEN3013 in tumor cells obtained from lymph node (LN) biopsies of B-NHL patients, who were newly diagnosed (ND) or relapsed from/refractory to (RR) treatment regimens containing CD20 monoclonal antibodies. Moreover, we explored whether specific tumor microenvironment characteristics could be associated with sensitivity to GEN3013.

Introduction:CD20-specific monoclonal antibodies (mAbs) have demonstrated efficacy in the treatment of B-cell non-Hodgkin lymphomas (B-NHL); however, a significant proportion of patients (pts) present with refractory disease or will experience relapse. GEN3013 (DuoBody®-CD3×CD20) is the first subcutaneously administered IgG1 bispecific antibody (bsAb) that targets the T-cell surface antigen CD3 and the B-cell surface antigen CD20, triggering T-cell-mediated killing of B cells. In vitro,GEN3013 efficiently activates and induces cytotoxic activity of CD4+ and CD8+ T cells in the presence of B cells (Hiemstra et al. Blood2018), and results in long-lasting depletion of B cells in cynomolgus monkeys. Subcutaneous (SC) GEN3013 in cynomolgus monkeys resulted in lower plasma cytokine levels, and similar bioavailability and B-cell depletion, compared with intravenous administration. GEN3013 has higher potency in vitrothan most other CD3×CD20 bsAbs in clinical development (Hiemstra et al. HemaSphere2019). SC GEN3013 in pts with B-NHL is being evaluated in a first-in-human, Phase 1/2 trial (NCT03625037), which comprises a dose-escalation part and a dose-expansion part. Here we report preliminary dose-escalation data.

Kersten: Gilead: Honoraria; Novartis: Honoraria; Roche: Honoraria, Research Funding; Celgene: Honoraria, Research Funding; Bristol-Myers Squibb: Honoraria, Research Funding; Amgen: Honoraria, Research Funding; Takeda Oncology: Research Funding; Kite Pharma: Honoraria, Research Funding; Miltenyi: Honoraria; Mundipharma: Honoraria, Research Funding. Minnema:Jansen Cilag: Honoraria; Celgene Corporation: Honoraria, Research Funding; Gilead: Honoraria; Amgen: Honoraria; Servier: Honoraria. Vos:Celgene: Honoraria. Kastritis:Genesis: Honoraria; Amgen: Honoraria, Research Funding; Janssen: Honoraria, Research Funding; Takeda: Honoraria; Pfizer: Honoraria; Prothena: Honoraria. Chamuleau:Genmab: Research Funding. Deeren:Alexion, Amgen, Janssen, Roche, Sunesis, Takeda, Sanofi: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding. Doorduijn:Roche: Honoraria, Research Funding. Dimopoulos:Sanofi Oncology: Research Funding.Ixazomib in Waldenstrom's Macroglobulinemia

Van Der Horst: Genmab: Research Funding. Oostindie:Genmab: Employment, Equity Ownership. Overdijk:Genmab: Employment, Equity Ownership. Chamuleau:Gilead: Research Funding; Genmab: Research Funding; celgene: Research Funding; BMS: Research Funding. Breij:Genmab: Employment, Equity Ownership. Mutis:Celgene: Research Funding; Novartis: Research Funding; Gilead: Research Funding; OnkImmune: Research Funding; Janssen: Membership on an entity's Board of Directors or advisory committees, Research Funding; Genmab: Research Funding.

Oostindie: Genmab: Employment, Equity Ownership. Van Der Horst:Genmab: Research Funding. Overdijk:Genmab: Employment, Equity Ownership. Strumane:Genmab: Employment, Equity Ownership. Verploegen:Genmab: Employment, Equity Ownership. Lindorfer:Genmab: Research Funding. Cook:Genmab: Research Funding. Chamuleau:Gilead: Research Funding; BMS: Research Funding; celgene: Research Funding; Genmab: Research Funding. Mutis:Gilead: Research Funding; Celgene: Research Funding; Janssen: Membership on an entity's Board of Directors or advisory committees, Research Funding; Genmab: Research Funding; Novartis: Research Funding; OnkImmune: Research Funding. Schuurman:Genmab: Employment, Other: Warrants. Sasser:Genmab: Employment, Equity Ownership. Taylor:Genmab: Research Funding. Parren:Genmab: Equity Ownership; Lava Therapeutics: Employment. Beurskens:Genmab: Employment, Equity Ownership. Breij:Genmab: Employment, Equity Ownership.