ALBERT

Description: Dependence on the 26S proteasome is an Achilles’ heel for triple-negative breast cancer (TNBC) and multiple myeloma (MM). The therapeutic proteasome inhibitor, bortezomib, successfully targets MM but often leads to drug-resistant disease relapse and fails in breast cancer. Here we show that a 26S proteasome-regulating kinase, DYRK2, is a therapeutic target for both MM and TNBC. Genome editing or small-molecule mediated inhibition of DYRK2 significantly reduces 26S proteasome activity, bypasses bortezomib resistance, and dramatically delays in vivo tumor growth in MM and TNBC thereby promoting survival. We further characterized the ability of LDN192960, a potent and selective DYRK2-inhibitor, to alleviate tumor burden in vivo. The drug docks into the active site of DYRK2 and partially inhibits all 3 core peptidase activities of the proteasome. Our results suggest that targeting 26S proteasome regulators will pave the way for therapeutic strategies in MM and TNBC.

Description: P-BCMA-101 is a novel chimeric antigen receptor (CAR)-T cell product targeting B Cell Maturation Antigen (BCMA). P-BCMA-101 is produced using the piggyBac® (PB) DNA Modification System instead of the viral vector that is used with most CAR-T cells, requiring only plasmid DNA and mRNA. This makes it less costly and produces cells with a high percentage of the favorable T stem cell memory phenotype (TSCM). The higher cargo capacity of PB permits the incorporation of multiple genes in addition to CAR(s), including a safety switch allowing for rapid CAR-T cell elimination with a small molecule drug infusion in patients if desired, and a selection gene allowing for enrichment of CAR+ cells. Rather than using a traditional antibody-based binder, P-BCMA-101 has a Centyrin™ fused to a CD3ζ/4-1BB signaling domain. Centyrins are fully human proteins with high specificity and a large range of binding affinities, but are smaller, more stable and potentially less immunogenic than traditional scFv. Cumulatively, these features are predicted to result in a greater therapeutic index. A Phase 1, 3+3 dose escalation from 0.75 to 15 x 106 P-BCMA-101 CAR-T cells/kg (RP2D 6-15 x 106 cells/kg) was conducted in patients with r/r MM (Blood 2018 132:1012) demonstrating excellent efficacy and safety of P-BCMA-101, including notably low rates and grades of CRS and neurotoxicity (maximum Grade 2 without necessitating ICU admission, safety switch activation or other aggressive measures). These results supported FDA RMAT designation and initiation of a pivotal Phase 2 study. A Phase 2 pivotal portion of this study has recently been designed and initiated (PRIME; NCT03288493) in r/r MM patients who have received at least 3 prior lines of therapy. Their therapy must have contained a proteasome inhibitor, an IMiD, and CD38 targeted therapy with at least 2 of the prior lines in the form of triplet combinations. They must also have undergone ≥2 cycles of each line unless PD was the best response, refractory to the most recent line of therapy, and undergone autologous stem cell transplant or not be a candidate. Patients are required to be 〉=18 years old, have measurable disease by International Myeloma Working Group criteria (IMWG; Kumar 2016), adequate vital organ function and lack significant autoimmune, CNS and infectious diseases. No pre-specified level of BCMA expression is required, as this has not been demonstrated to correlate with clinical outcomes for P-BCMA-101 and other BCMA-targeted CAR-T products. Interestingly, unlike most CAR-T products patients may receive P-BCMA-101 after prior CAR-T cells or BCMA targeted agents, and may be multiply infused with P-BCMA-101. Patients are apheresed to harvest T cells, P-BCMA-101 is then manufactured and administered to patients as a single intravenous (IV) dose (6-15 x 106 P-BCMA-101 CAR-T cells/kg) after a standard 3-day cyclophosphamide (300 mg/m2/day) / fludarabine (30 mg/m2/day) conditioning regimen. One hundred patients are planned to be treated with P-BCMA-101. Uniquely, given the safety profile demonstrated during Phase 1, no hospital admission is required and patients may be administered P-BCMA-101 in an outpatient setting. The primary endpoints are safety and response rate by IMWG criteria. With a 100-subject sample, the Phase 2 part of the trial will have 90% power to detect a 15-percentage point improvement over a 30% response rate (based on that of the recently approved anti-CD38 antibody daratumumab), using an exact test for a binomial proportion with a 1-sided 0.05 significance level. Multiple biomarkers are being assessed including BCMA and cytokine levels, CAR-T cell kinetics, immunogenicity, T cell receptor diversity, CAR-T cell and patient gene expression (e.g. Nanostring) and others. Overall, the PRIME study is the first pivotal study of the unique P-BCMA-101 CAR-T product, and utilizes a number of novel design features. Studies are being initiated in combination with approved therapeutics and earlier lines of therapy with the intent of conducting Phase 3 trials. Funding by Poseida Therapeutics and the California Institute for Regenerative Medicine (CIRM). Disclosures Costello: Takeda: Honoraria, Research Funding; Janssen: Research Funding; Celgene: Consultancy, Honoraria, Research Funding. Gregory:Poseida: Research Funding; Celgene: Speakers Bureau; Takeda: Speakers Bureau; Amgen: Speakers Bureau. Ali:Celgene: Research Funding; Poseida: Research Funding. Berdeja:Amgen Inc, BioClinica, Celgene Corporation, CRISPR Therapeutics, Bristol-Myers Squibb Company, Janssen Biotech Inc, Karyopharm Therapeutics, Kite Pharma Inc, Prothena, Servier, Takeda Oncology: Consultancy; AbbVie Inc, Amgen Inc, Acetylon Pharmaceuticals Inc, Bluebird Bio, Bristol-Myers Squibb Company, Celgene Corporation, Constellation Pharma, Curis Inc, Genentech, Glenmark Pharmaceuticals, Janssen Biotech Inc, Kesios Therapeutics, Lilly, Novartis, Poseida: Research Funding; Poseida: Research Funding. Patel:Oncopeptides, Nektar, Precision Biosciences, BMS: Consultancy; Takeda, Celgene, Janssen: Consultancy, Research Funding; Poseida Therapeutics, Cellectis, Abbvie: Research Funding. Shah:University of California, San Francisco: Employment; Genentech, Seattle Genetics, Oncopeptides, Karoypharm, Surface Oncology, Precision biosciences GSK, Nektar, Amgen, Indapta Therapeutics, Sanofi: Membership on an entity's Board of Directors or advisory committees; Indapta Therapeutics: Equity Ownership; Celgene, Janssen, Bluebird Bio, Sutro Biopharma: Research Funding; Poseida: Research Funding; Bristol-Myers Squibb: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; Amgen: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; Nkarta: Consultancy, Membership on an entity's Board of Directors or advisory committees; Kite: Consultancy, Membership on an entity's Board of Directors or advisory committees; Teneobio: Consultancy, Membership on an entity's Board of Directors or advisory committees. Ostertag:Poseida Therapeutics, Inc.: Employment, Equity Ownership. Martin:Poseida Therapeutics, Inc.: Employment, Equity Ownership. Ghoddusi:Poseida Therapeutics, Inc.: Employment, Equity Ownership. Shedlock:Poseida Therapeutics, Inc.: Employment, Equity Ownership. Spear:Poseida Therapeutics, Inc.: Employment, Equity Ownership. Orlowski:Poseida Therapeutics, Inc.: Research Funding. Cohen:Poseida Therapeutics, Inc.: Research Funding.

Description: Advances in novel agents and treatment combinations have improved prognosis and increased disease-free and overall survival for patients (pts) with multiple myeloma (MM). However, currently available data on disease presentation, treatment patterns, and outcomes for real-world MM pts at the global level are limited. This is due to several factors, including the overrepresentation of medically fit pts in clinical trials making generalization of outcomes challenging, the large number of treatment combinations, and varying global access/practice patterns. INSIGHT-MM (NCT02761187) is a global, prospective, non-interventional, observational study which aims to further understand disease and pt characteristics at presentation, treatment and clinical outcomes of real-world MM pts, as well as the association of treatment with tolerability, effectiveness, health-related quality of life (HRQoL), and healthcare resource utilization (HRU), on both a country-specific and global basis. As this is an observational study, no formal hypothesis will be tested. The INSIGHT-MM objectives are summarized in the Table. At least 5000 pts aged ≥18 yrs with newly diagnosed or relapsed/refractory MM will be enrolled over a 3-yr period and followed prospectively for ≥5 yrs, until death or end of study, whichever comes first. Pts not available for data collection for 〉9 mos will have follow-up for survival. No study drug or medications will be provided; no modification of standard of care pt management will be assigned per protocol. Choice of therapy for all pts will be decided by the treating healthcare provider independent of study participation. Baseline pt and MM-specific characteristics, diagnosis, comorbidities, and prior therapies will be recorded based on review of hospital/clinic records. MM management, disease status and safety data will be obtained as part of routine office visits and recorded quarterly by each site in electronic case report forms. Quarterly assessment of MM management will be done based on prior and current treatment and recorded reason for treatment changes. Effectiveness of therapy will be assessed based on response, progression status, time to next therapy, vital status, and date and cause of death. Treatment tolerability will be assessed based on serious and non-serious adverse events leading to treatment discontinuation or dose modification. Incidence of second primary malignancies will be recorded. HRQoL, a specific type of patient reported outcome (PRO), will be collected at study entry and at predefined intervals following initiation of therapy using a secure electronic data collection system. HRQoL will be collected using the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire (EORTC QLQ-C30) and the MM module (EORTC QLQ-MY20). To capture pt satisfaction with MM-directed therapy, including the dimension of convenience, the 9-item Treatment Satisfaction Questionnaire for Medication will be used. The 5-dimension, 5-level EuroQol (EQ-5D-5L) PRO instrument will capture self-reported preference-based measures of health status suitable for calculating quality-adjusted life year (QALY) data to inform health economic evaluations. Frailty will be assessed using the Charlson Comorbidity Index, the Katz Index of Independence in Activities of Daily Living, and the Lawton Instrumental Activities of Daily Living. HRU will be evaluated using inpatient and intensive care unit admissions, length of stay, outpatient clinic visits, and emergency room visits. Data for all participating pts will be extracted by healthcare professionals at the site level and entered into a central database; descriptive statistical analyses will be done to address the study objectives. Interim analyses are planned after 1000 and 5000 pts have been enrolled and a final analysis will be conducted within 1 year after the last pt entered has completed ≥5 yrs follow-up. Data will be analyzed biannually to address emerging clinical questions identified by investigators to increase understanding of real-world treatment patterns. INSIGHT-MM aims to promote better understanding of contemporary demographics, patterns of care, and outcomes for real-world MM pts to inform treatment practice, supportive care, and pt outcomes. The study is currently ongoing and recruiting pts; further details regarding study rationale and protocol will be provided. Table 1 Table 1. Disclosures Davies: Takeda: Consultancy, Honoraria; Celgene: Consultancy, Honoraria; Janssen: Consultancy, Honoraria. Palumbo:Janssen Cilag: Honoraria; Takeda: Employment, Honoraria. Zonder:Bristol Myers Squibb: Consultancy, Honoraria; Celgene: Consultancy, Honoraria, Research Funding; Takeda: Consultancy, Honoraria; Janssen: Consultancy, Honoraria; Prothena: Consultancy, Honoraria; Seattle Genetics: Consultancy, Honoraria; Pharmacyclics: Other: DSMC membership. Girnius:Takeda: Consultancy, Membership on an entity's Board of Directors or advisory committees; Celgene: Speakers Bureau. Costello:Takeda: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Janssen: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau; Celgene: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding. Usmani:Array: Research Funding; Celgene: Consultancy, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau; Amgen: Consultancy, Research Funding, Speakers Bureau; Takeda: 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, Research Funding, Speakers Bureau; Millenium: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Onyx: Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau; Janssen: Membership on an entity's Board of Directors or advisory committees, Research Funding; BioPharma: Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau; Pharmacyclics: Research Funding; Britsol-Myers Squibb: Consultancy, Research Funding; Skyline: Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; Novartis: Speakers Bureau. Berdeja:Abbvie, Acetylon, Amgen, Bluebird, BMS, Calithera, Celgene, Constellation, Curis, Epizyme, Janssen, Karyopharm, Kesios, Novartis, Onyx, Takeda, Tragara: Research Funding. Omel:Takeda: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Other: Member of Takeda's "Patient Leadership Council". Token payment. Thompson:Celgene: Membership on an entity's Board of Directors or advisory committees, Other: MDS/AML Registry; Bristol-Myers Squibb: Membership on an entity's Board of Directors or advisory committees; AIM Specialty Health: Membership on an entity's Board of Directors or advisory committees; VIA Oncology: Membership on an entity's Board of Directors or advisory committees; Takeda: Membership on an entity's Board of Directors or advisory committees, Other: Multiple Myeloma International Registry; Doximity: Equity Ownership, Membership on an entity's Board of Directors or advisory committees. Shah:Array: Research Funding; Novartis: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Amgen: Honoraria, Research Funding; Bristol-Myers Squibb: Research Funding; Takeda: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Celgene: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding. Schwartz:Bayer: Consultancy; Blue Cross and Blue Shield Associations: Consultancy; Pfizer: Consultancy; Takeda: Consultancy. Hajek:Takeda: Honoraria, Membership on an entity's Board of Directors or advisory committees. Terpos:Amgen: Consultancy, Honoraria, Research Funding; Celgene: Honoraria; Bristol-Myers Squibb: Consultancy, Honoraria; Janssen: Consultancy, Honoraria, Research Funding; Takeda: Consultancy, Honoraria; Genesis: Consultancy, Honoraria, Research Funding; Novartis: Honoraria. Hungria:Takeda: Consultancy; Roche: Consultancy; International Myeloma Foundation Latin America: Membership on an entity's Board of Directors or advisory committees; Janssen: Consultancy, Speakers Bureau; Bristol: Consultancy; Amgen: Consultancy. Mateos:Takeda: Honoraria; Amgen: Honoraria; Janssen: Honoraria; Celgene: Honoraria. Cook:Bristol-Myers Squibb: Consultancy, Honoraria; Amgen: Consultancy, Honoraria, Research Funding, Speakers Bureau; Takeda: Consultancy, Honoraria, Research Funding, Speakers Bureau; Glycomimetics: Consultancy, Honoraria; Celgene: Consultancy, Honoraria, Research Funding, Speakers Bureau; Sanofi: Consultancy, Honoraria, Speakers Bureau; Janssen: Consultancy, Honoraria, Research Funding, Speakers Bureau. Leleu:Novartis: Honoraria; LeoPharma: Honoraria; Pierre Fabre: Honoraria; Amgen: Honoraria; Bristol-Myers Squibb: Honoraria; Takeda: Honoraria; Celgene: Honoraria; Janssen: Honoraria; TEVA: Membership on an entity's Board of Directors or advisory committees. Goldschmidt:Celgene: Membership on an entity's Board of Directors or advisory committees, Research Funding; Bristol-Myers Squibb: Membership on an entity's Board of Directors or advisory committees, Research Funding; Chugai: Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau; Janssen: Membership on an entity's Board of Directors or advisory committees, Research Funding; Novartis: Membership on an entity's Board of Directors or advisory committees, Research Funding; Millennium: Membership on an entity's Board of Directors or advisory committees, Research Funding; Onyx: Honoraria, Membership on an entity's Board of Directors or advisory committees; Takeda: Membership on an entity's Board of Directors or advisory committees; Amgen: Membership on an entity's Board of Directors or advisory committees. Seal:Millennium Pharmaceuticals, Inc., a wholly owned subsidiary of Takeda Pharmaceutical Company Limited: Employment, Equity Ownership. Pashos:Millennium Pharmaceuticals, Inc., Cambridge, MA, USA, a wholly owned subsidiary of Takeda Pharmaceutical Company Limited: Employment. Stull:Millennium Pharmaceuticals, Inc., Cambridge, MA, USA, a wholly owned subsidiary of Takeda Pharmaceutical Company Limited: Employment. Romanus:Millennium Pharmaceuticals, Inc., Cambridge, MA, USA, a wholly owned subsidiary of Takeda Pharmaceutical Company Limited: Employment. Cacioppo:Millennium Pharmaceuticals, Inc., Cambridge, MA, USA, a wholly owned subsidiary of Takeda Pharmaceutical Company Limited: Employment. Bell:Millennium Pharmaceuticals, Inc., a wholly owned subsidiary of Takeda Pharmaceutical Company Limited: Employment, Equity Ownership. Yu:Takeda Restricted Stock Unit (RSU), a publicly traded company: Equity Ownership; Takeda Development Center Americas, Inc., Deerfield, IL, USA, a wholly owned subsidiary of Takeda Pharmaceutical Company Limited: Employment. Luptakova:Takeda Oncology: Employment. Niculescu:Millennium Pharmaceuticals, Inc., Cambridge, MA, USA, a wholly owned subsidiary of Takeda Pharmaceutical Company Limited: Employment. Noga:Millennium Pharmaceuticals, Inc., Cambridge, MA, USA, a wholly owned subsidiary of Takeda Pharmaceutical Company Limited: Employment, Equity Ownership. Skacel:Millennium Pharmaceuticals, Inc., Cambridge, MA, USA, a wholly owned subsidiary of Takeda Pharmaceutical Company Limited: Employment. Chari:Array Biopharma: Consultancy, Research Funding; Amgen Inc.: Honoraria, Research Funding; Celgene: Consultancy, Research Funding; Takeda: Consultancy, Research Funding; Pharmacyclics: Research Funding; Novartis: Consultancy, Research Funding; Janssen: Consultancy, Research Funding.

Description: Background Multiple groups of pts, including elderly/frail pts and those with comorbidities, are typically under-represented in randomized controlled trials (RCTs). A recent study found an average of 16 eligibility criteria per cancer trial, 60% of which were related to comorbidity or performance status (PS; Unger, JNCI 2014). Phase 3 RCTs in MM have similar extensive eligibility criteria, resulting in populations that are not reflective of RW MM pts. Data from CONNECT-MM (Shah, CLML, 2017) and CoMMpass (Fiala, IMW 2017) suggest that 22-40% of RW pts are ineligible for MM RCTs, and an analysis of US RW relapsed/refractory MM (RRMM) pts showed that only 25-47% of pts would have been eligible for the phase 3 ASPIRE, TOURMALINE-MM1, ELOQUENT-2, and POLLUX studies, based on their differing eligibility criteria (Chari, EHA 2018). Further, data from CONNECT MM show that clinical trial ineligibility is associated with poorer long-term outcome (Shah, CLML, 2017). Thus, it is important to characterize RW MM pts and understand the discrepancies vs RCT populations. INSIGHT MM (NCT02761187) is the largest prospective, observational study in MM to date, following ~4,200 pts from 15 countries. Here we analyze RCT eligibility in INSIGHT MM pts, with a focus on the treatment of frail MM pts in the real world. Methods INSIGHT MM is following newly diagnosed (≤3 mos since treatment initiation) MM (NDMM) and RRMM (≤3 prior lines) pts. Demographics and disease characteristics, including medical history, comorbidities, PS, and frailty status (per IMWG Frailty Index criteria, Palumbo, JCO 2015), are collected using electronic case report forms at study baseline visit. For this analysis, pt data were reviewed vs 20 standard RCT eligibility criteria, using a conservative approach of classifying 'not available' data as 'eligible'; laboratory/PS and medical history exclusion criteria are summarized in the Table. Presence of hypertension was reviewed but omitted, as INSIGHT MM only collected data on 'hypertension requiring treatment' vs the standard RCT exclusion criterion of 'uncontrolled hypertension'. Results Data from 3,201 pts (1,761 NDMM, 1,440 RRMM) were analyzed. The proportions of pts who would be ineligible for RCTs based on each individual parameter, and the overall rate of ineligible pts, are shown in the Table. Overall, 39.2% of pts would have been ineligible for RCTs based on not meeting at least one of the 20 standard eligibility criteria included in this analysis, including 38.8% of NDMM and 39.7% of RRMM pts. The most common criteria excluding pts overall were another prior malignancy (7.5%), CrCl ≤30 mL/min (6.4%), cardiac arrhythmias (5.4%), platelets ≤75,000/mm3 (5.1%), and hemoglobin

Description: Background Ixazomib, the first oral proteasome inhibitor, has been approved for 〉3 years in 〉70 countries, for the treatment of RRMM pts who have received ≥1 prior therapy, on the basis of the TOURMALINE-MM1 study, which reported an overall response rate (ORR) of 78% and median progression free survival (PFS) of 20.6 mos. Although outcomes and tolerability in routine clinical practice often differ from data reported in clinical trials, growing evidence suggest that outcomes in patients treated with ixazomib-based regimens are comparable to those in the Phase 3 TOURMALINE-MM1 trial. We report on an expanded pooled analysis with longer follow-up of IRd therapy from the INSIGHT MM study (NCT02761187) and the Czech Registry of Monoclonal Gammopathies (RMG) to evaluate the effectiveness of IRd in RRMM pts in routine clinical practice. Methods INSIGHT MM is a large, prospective, observational study which has enrolled over 4,200 adult pts with MM from Europe (plus Israel, EUR), the US, Asia, and Latin America, with a planned follow-up of ≥5 years. The RMG comprises clinical data for 〉6,000 MM pts enrolled at 19 Czech and 4 Slovak centers. Eligible pts had 1-3 (INSIGHT) or ≥1 prior therapy (RMG) including an IR-based regimen. Individual pt level data on demographics, disease characteristics, treatment history, effectiveness, and safety from INSIGHT and RMG were integrated and analyzed. Best response or time to first response and PFS were determined as per investigator assessment, using IMWG criteria. PFS, duration of treatment (DOT), and overall survival (OS) were estimated using Kaplan Meier (KM) methodology, applying an exclusion criterion to account for immortal time bias (INSIGHT only). Results At data cutoff of 22 Nov 2018, 217 pts (83 in INSIGHT and 134 in RMG) from 11 countries had been included: 191 (88%) from EUR, 17 (8%) from the US, and 9 (4%) from Taiwan; 89% of pts were treated in an academic facility. At diagnosis, 32% of pts had ISS Stage III disease, 78% had bone lesions, 46% had anemia, and 12% had elevated creatinine. At study start, median age was 67 years with 12% 〉75 years; 58%/14% of pts had ECOG performance status 1/2. The distribution of immunoglobulin (Ig) heavy and light chain MM was as expected; 69% of pts had IgG MM. Overall, 21% of pts had extramedullary disease. Prior therapies included: bortezomib (90%), stem cell transplant (60%), thalidomide (47%), lenalidomide (26%), carfilzomib (8%), daratumumab (6%), and pomalidomide (2%). Median time from diagnosis to start of IRd therapy was 42.1 mos; 43%/35%/22% of pts received IRd at 2nd/3rd/≥4th line. The most common reasons for starting IRd were relapse/progression (87%) and insufficient response (10%). The most common CRAB criteria present were bone lesions (48%) and anemia (18%). Median duration of follow-up was 12.6 mos in all pts. At data cutoff, 117 (54%) pts had discontinued IRd; median DOT was 11.9 (95% CI: 9.4-15.2) mos; at 12 mos, 49% (41.3-56.2) of pts were still on treatment (KM estimates). Data on best response to therapy were available for 152 pts. The ORR was 74%, with 36% ≥VGPR; ORR with IRd at 2nd/3rd/ ≥4th-line therapy was 82%/71%/59%, including 43%/37%/17% ≥VGPR. Median time to first response was 1.2 mos (RMG); median time to best response was 3.7 mos (INSIGHT). Median PFS was 21.6 (95% CI: 13.6-26.7) mos across all lines. PFS rate at 12 mos was 62%, and 86 (40%) pts had progressed at data cutoff. Median time to next therapy (TTNT) was 31.5 (95% CI: 24.5-35.9) mos, with a 12-month rate of 74% across all lines. Overall, 60 (28%) pts received subsequent therapies including daratumumab (22%), pomalidomide (22%), bortezomib (20%), carfilzomib (17%), lenalidomide (15%), and thalidomide (12%). At data cutoff, 53 (24%) pts had died. Median OS was 36.7 (95% CI: 24.4-NR) mos, with 79% of pts alive at 12 mos (Figure). Regarding safety, ixazomib and lenalidomide dose reductions were required in 16% and 36% of pts, respectively, including 10% and 21% who required dose reductions due to AEs. Conclusions These findings show that the effectiveness of IRd in routine clinical practice (ORR 74%, median PFS 21.6 mos) is comparable to the efficacy of IRd reported in the registrational TOURMALINE MM1 trial (ORR 78%, median PFS 20.6 mos). IRd is well tolerated with no new safety signals, and low rates of dose reductions due to AEs for ixazomib (10%) and lenalidomide (21%). Outcomes should be interpreted with caution due to limited maturity of data. Disclosures Hajek: Janssen: Honoraria, Other: Consultant or advisory relationship, Research Funding; Amgen: Honoraria, Other: Consultant or advisory relationship, Research Funding; Celgene: Honoraria, Other: Consultant or advisory relationship, Research Funding; AbbVie: Other: Consultant or advisory relationship; Bristol-Myers Squibb: Honoraria, Other: Consultant or advisory relationship, Research Funding; Novartis: Other: Consultant or advisory relationship, Research Funding; PharmaMar: Honoraria, Other: Consultant or advisory relationship; Takeda: Honoraria, Other: Consultant or advisory relationship, Research Funding. Minarik:Celgene: Consultancy, Honoraria, Research Funding; Amgen, BMS, Janssen-Cilag, Takeda: Consultancy, Honoraria. Straub:Amgen, Takeda, Celgene: Consultancy. Berdeja:Amgen Inc, BioClinica, Celgene Corporation, CRISPR Therapeutics, Bristol-Myers Squibb Company, Janssen Biotech Inc, Karyopharm Therapeutics, Kite Pharma Inc, Prothena, Servier, Takeda Oncology: Consultancy; AbbVie Inc, Amgen Inc, Acetylon Pharmaceuticals Inc, Bluebird Bio, Bristol-Myers Squibb Company, Celgene Corporation, Constellation Pharma, Curis Inc, Genentech, Glenmark Pharmaceuticals, Janssen Biotech Inc, Kesios Therapeutics, Lilly, Novartis, Poseida: Research Funding; Poseida: Research Funding. Boccadoro:AbbVie: Honoraria; Mundipharma: Research Funding; Novartis: Honoraria, Research Funding; Bristol-Myers Squibb: Honoraria, Research Funding; Sanofi: Honoraria, Research Funding; Celgene: Honoraria, Research Funding; Amgen: Honoraria, Research Funding; Janssen: Honoraria, Research Funding. Spencer:AbbVie: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Celgene: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau; Haemalogix: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; Takeda: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau; Secura Bio: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; Servier: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; Specialised Therapeutics Australia: Consultancy, Honoraria; Sanofi: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; Janssen Oncology: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau; Amgen: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding. van Rhee:Karyopharm Therapeutics: Consultancy; Kite Pharma: Consultancy; Adicet Bio: Consultancy; EUSA: Consultancy; Castleman Disease Collaborative Network: Consultancy; Takeda: Consultancy; Sanofi Genzyme: Consultancy. Thompson:Takeda: Membership on an entity's Board of Directors or advisory committees, Research Funding; VIA Oncology: Membership on an entity's Board of Directors or advisory committees; Adaptive: Membership on an entity's Board of Directors or advisory committees; UpToDate: Patents & Royalties: Myeloma reviewer; GSK: Membership on an entity's Board of Directors or advisory committees; Celgene: Membership on an entity's Board of Directors or advisory committees; Doximity: Equity Ownership, Membership on an entity's Board of Directors or advisory committees; AbbVie: Research Funding; BMS: Research Funding; Lynx Bio: Research Funding. Abonour:BMS: Consultancy; Celgene: Consultancy, Research Funding; Takeda: Consultancy, Research Funding; Janssen: Consultancy, Research Funding. Chari:Amgen: Consultancy, Membership on an entity's Board of Directors or advisory committees, Research Funding; Oncoceutics: Research Funding; Novartis Pharmaceuticals: Research Funding; GlaxoSmithKline: Research Funding; Array Biopharma: Research Funding; Karyopharm: Consultancy, Membership on an entity's Board of Directors or advisory committees; Janssen: Consultancy, Membership on an entity's Board of Directors or advisory committees, Research Funding; Millennium/Takeda: Consultancy, Membership on an entity's Board of Directors or advisory committees, Research Funding; Celgene: Consultancy, Membership on an entity's Board of Directors or advisory committees, Research Funding; Bristol-Myers Squibb: Consultancy; Pharmacyclics: Research Funding; Seattle Genetics: Membership on an entity's Board of Directors or advisory committees, Research Funding; Sanofi: Membership on an entity's Board of Directors or advisory committees. Cook:Karyopharm: Consultancy, Honoraria, Speakers Bureau; Celgene: Consultancy, Honoraria, Research Funding, Speakers Bureau; Sanofi: Consultancy, Honoraria, Speakers Bureau; Takeda: Consultancy, Honoraria, Research Funding, Speakers Bureau; Janssen: Consultancy, Honoraria, Research Funding, Speakers Bureau. Costello:Takeda: Honoraria, Research Funding; Janssen: Research Funding; Celgene: Consultancy, Honoraria, Research Funding. Davies:Amgen, Celgene, Janssen, Oncopeptides, Roche, Takeda: Membership on an entity's Board of Directors or advisory committees, Other: Consultant/Advisor; Janssen, Celgene: Other: Research Grant, Research Funding. Hungria:Janssen: 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, Speakers Bureau; Celgene: 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; BMS: Consultancy, Honoraria, Speakers Bureau; Celgene: 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; Takeda: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau; BMS: Consultancy, Honoraria, Speakers Bureau; Abbvie: Consultancy, Membership on an entity's Board of Directors or advisory committees; Abbvie: Consultancy, Membership on an entity's Board of Directors or advisory committees; Amgen: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Speakers Bureau. Lee:Amgen: Consultancy, Research Funding; GlaxoSmithKline plc: Research Funding; Sanofi: Consultancy; Daiichi Sankyo: Research Funding; Celgene: Consultancy, Research Funding; Takeda: Consultancy, Research Funding; Janssen: Consultancy, Research Funding. Leleu:Sanofi: Honoraria; Takeda: Honoraria; Oncopeptide: Honoraria; Karyopharm: Honoraria; Amgen: Honoraria; Carsgen: Honoraria; Incyte: Honoraria; Novartis: Honoraria; Celgene: Honoraria; Janssen: Honoraria; BMS: Honoraria; Merck: Honoraria. Puig:Takeda: Consultancy, Honoraria; The Binding Site: Honoraria; Janssen: Consultancy, Honoraria, Research Funding; Celgene: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau. Rifkin:Takeda: Membership on an entity's Board of Directors or advisory committees; Celgene: Membership on an entity's Board of Directors or advisory committees; Amgen: Membership on an entity's Board of Directors or advisory committees. Terpos:Celgene: Honoraria; Takeda: Honoraria, Other: Travel expenses, Research Funding; Medison: Honoraria; Janssen: Honoraria, Other: Travel expenses, Research Funding; Amgen: Honoraria, Research Funding; Genesis: Honoraria, Other: Travel expenses, Research Funding. Usmani:Bristol-Myers Squibb: Consultancy, Research Funding; Sanofi: Patents & Royalties, Research Funding, Speakers Bureau; Janssen: Consultancy, Patents & Royalties, Research Funding, Speakers Bureau; Takeda: Consultancy, Patents & Royalties, Research Funding, Speakers Bureau; Celgene: Consultancy, Patents & Royalties, Research Funding, Speakers Bureau; Merck: Consultancy, Research Funding; Pharmacyclics: Patents & Royalties, Research Funding; Amgen: Consultancy, Patents & Royalties, Research Funding, Speakers Bureau; Array Biopharma: Patents & Royalties, Research Funding; Skyline DX: Consultancy. Weisel:Sanofi: Consultancy, Honoraria, Research Funding; Juno: Consultancy; GSK: Honoraria; Takeda: Consultancy, Honoraria; Amgen: Consultancy, Honoraria, Research Funding; Bristol-Myers Squibb: Consultancy, Honoraria; Celgene Corporation: Consultancy, Honoraria, Research Funding; Adaptive Biotech: Consultancy, Honoraria; Janssen: Consultancy, Honoraria, Research Funding. Zonder:Celgene Corporation: Consultancy, Honoraria, 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; Amgen: Consultancy, Membership on an entity's Board of Directors or advisory committees; Intellia: Consultancy, Membership on an entity's Board of Directors or advisory committees; Caelum: Consultancy, Membership on an entity's Board of Directors or advisory committees; Alnylam: Consultancy, Membership on an entity's Board of Directors or advisory committees; BMS: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Janssen: Consultancy, Membership on an entity's Board of Directors or advisory committees; Oncopeptides: Consultancy, Membership on an entity's Board of Directors or advisory committees. Skacel:Millennium Pharmaceuticals, Inc., subsidiary of Takeda Pharmaceutical Company Limited: Employment. Elliott:Takeda: Employment. Demers:Takeda: Employment. Stull:Takeda: Employment. Ren:Takeda: Employment. Maisnar:Janssen, Amgen, Celgene, Takeda, BMS: Consultancy, Honoraria.

Description: Background Ixazomib (ixa), the first oral proteasome inhibitor, is approved in combination with lenalidomide (len)-dexamethasone in 〉50 countries globally, including the US and EU, for the treatment of relapsed/refractory MM (RRMM) pts who have received ≥1 prior therapy. Outcomes and tolerability in routine clinical practice often differ from data reported in clinical trials for novel-agent-based MM therapies; however, data directly comparing efficacy in clinical trials with effectiveness in routine clinical practice of new MM agents and regimens are currently limited. To evaluate the effectiveness of IRd in RRMM pts in routine clinical practice, we performed a pooled analysis of individual pt-level data for IRd-treated RRMM pts from the ongoing INSIGHT MM (NCT02761187) study and from the Czech RMG. INSIGHT MM is the largest global, prospective, observational MM study conducted to date, which is currently enrolling ~4200 adult pts with newly diagnosed MM or RRMM from Europe (EUR), the US, Asia, and Latin America. The Czech RMG was established by the Czech Myeloma Group in 2007 and comprises clinical data for 〉6000 MM pts enrolled at 19 Czech and 4 Slovak centers. Methods RRMM pts with 1-3 (INSIGHT MM) or ≥1 (RMG) prior therapies who had been treated with IRd were identified. INSIGHT MM pts required prospectively collected data on IRd therapy; pts who received another regimen or additional treatment within the same line of therapy as IRd were excluded. RMG pts from Czech centers who received IRd were included using the same eligibility criteria as the INSIGHT MM study. Individual pt-level data on demographics, disease characteristics, treatment history, effectiveness, and safety for IRd-treated RRMM pts from INSIGHT MM and the Czech RMG were integrated and analyzed. Best response and PFS were determined as per the assessment of the treating physician or local investigator, utilizing IMWG criteria. Descriptive analyses were performed on the integrated data as well as on data from INSIGHT MM and from the Czech RMG. PFS, TTNT, DOT, and OS were estimated using Kaplan Meier methodology. Results Overall, 163 IRd-treated RRMM pts from 9 countries were included in the analysis (50 INSIGHT MM, 113 Czech RMG); of these, 146 (90%) were from EUR, 16 (10%) from the US, and 1 (1%) from Taiwan. Median age was 67 (range 39-84) yrs, with 23 (14%) pts aged 〉75 yrs; 86 (53%) pts were male. At initial diagnosis, 38%/36%/26% of pts had ISS Stage I/II/III disease; median time from diagnosis to initiation of IRd treatment was 42.6 mos; 71% of pts had ECOG PS ≥1. Most pts (65%) had IgG MM, and 14% had extramedullary disease. Overall, 50%/30%/20% of pts received IRd as 2nd/3rd/≥4th-line therapy. The most common reasons for starting IRd therapy were relapse/progression (90%), including bone lesions (53%), and anemia (14%). Overall, 61% of pts had received prior stem cell transplant; prior therapies included bortezomib (bor) in 89% of pts, thalidomide (thal) in 42%, len in 21%, carfilzomib (car) in 11%, daratumumab (dara) in 3%, and pomalidomide (pom) in 2%. Median DOT was 14.0 mos; 101 (62%) pts were on treatment at data cut-off. Data on best response to therapy were available for 105 pts; among these, ORR (partial response or better) was 74%, with 31% ≥VGPR (Table); ORR with IRd as 2nd/3rd/≥4th-line therapy was 91%/57%/47%, including 41%/25%/11% ≥VGPR. Median time to first response was 1.1 mos for Czech RMG pts; median time to best response was 3.7 mos for INSIGHT MM pts. Overall, median PFS was 20.9 (95% CI: 13.0-28.7) mos, with a 12-mo rate of 65% (Table). Median PFS with 2nd/3rd/4th/〉4th-line therapy was NR/23.2/14.2/5.1 mos. Median TTNT was 26.2 (95% CI: 9.6-42.8) mos, with a 12-mo rate of 73% (Table). Overall, 37 (23%) pts received subsequent therapies including bor (24%), pom (24%), thal (16%), dara (16%), car (14%), or len (8%). Median OS was not reached, with 81% of pts alive at 12 mos (Table). Ixa and len dose reductions were required in 15% and 30% of pts, respectively, with 11% and 21% of pts, respectively, requiring dose reductions due to AEs (Table). Conclusions These findings show that the effectiveness of IRd in routine clinical practice, including an ORR of 74% and a median PFS of 20.9 mos, is comparable to the efficacy of IRd reported in the TOURMALINE-MM1 trial (ORR 78%, median PFS 20.6 mos). IRd is well tolerated in RRMM pts treated in routine clinical practice, with low rates of dose reductions due to AEs for ixa (11%) and len (21%). Table. Table. Disclosures Hajek: Bristol-Myers Squibb: Consultancy, Honoraria, Research Funding; Celgene: Consultancy, Honoraria, Research Funding; Takeda: Consultancy, Honoraria, Research Funding; Janssen: Consultancy, Honoraria, Research Funding; Amgen: Consultancy, Honoraria, Research Funding. Terpos:Novartis: Honoraria; Celgene: Honoraria, Membership on an entity's Board of Directors or advisory committees; Takeda: Honoraria, Membership on an entity's Board of Directors or advisory committees, Other: Travel Grant, Patents & Royalties; Genesis: Honoraria, Membership on an entity's Board of Directors or advisory committees, Other: Travel Grant, Research Funding; Janssen: Honoraria, Membership on an entity's Board of Directors or advisory committees, Other: Travel Grant, Patents & Royalties; Amgen: Honoraria, Membership on an entity's Board of Directors or advisory committees, Other: Travel Grant, Research Funding. Lee:Celgene: Consultancy, Membership on an entity's Board of Directors or advisory committees; Adaptive Biotechnologies Corporation: Consultancy; Amgen: Consultancy, Membership on an entity's Board of Directors or advisory committees; Chugai Biopharmaceuticals: Consultancy; Takeda Oncology: Consultancy, Membership on an entity's Board of Directors or advisory committees; Kite Pharma: Consultancy, Membership on an entity's Board of Directors or advisory committees. Chari:Celgene: Consultancy, Membership on an entity's Board of Directors or advisory committees, Research Funding; Adaptive Biotechnology: Membership on an entity's Board of Directors or advisory committees; Novartis: Consultancy, Membership on an entity's Board of Directors or advisory committees, Research Funding; Amgen: Consultancy, Membership on an entity's Board of Directors or advisory committees, Research Funding; Takeda: Consultancy, Membership on an entity's Board of Directors or advisory committees, Research Funding; Janssen: Consultancy, Membership on an entity's Board of Directors or advisory committees, Research Funding; Bristol Myers Squibb: Consultancy; Pharmacyclics: Research Funding; Seattle Genetics: Membership on an entity's Board of Directors or advisory committees; The Binding Site: Consultancy; Array Biopharma: Research Funding. Costello:Poseida Therapeutics, Inc.: Research Funding; Takeda: Consultancy; Celgene: Consultancy. Puig:Takeda: Consultancy, Honoraria; Celgene: Honoraria, Research Funding; Janssen: Consultancy, Honoraria, Research Funding. Leleu:Celgene: Honoraria, Other: steering committee membership ; Janssen: Honoraria, Other; BMS: Honoraria, Other: steering committee membership ; Merk: Honoraria, Other: steering committee membership ; Takeda: Honoraria, Other: steering committee membership ; Amgen: Honoraria, Other: steering committee membership ; Sanofi: Honoraria, Other: steering committee membership steering committee membership ; Novartis: Honoraria, Other: steering committee membership ; Roche: Honoraria; Gilead: Honoraria; Incyte: Honoraria, Other: steering committee membership ; Karyopharm: Honoraria. Berdeja:Celgene: Research Funding; Sanofi: Research Funding; Glenmark: Research Funding; Bristol-Myers Squibb: Research Funding; Amgen: Research Funding; Takeda: Research Funding; Janssen: Research Funding; Novartis: Research Funding; Genentech: Research Funding; Bluebird: Research Funding; Teva: Research Funding; Poseida Therapeutics, Inc.: Research Funding. Davies:Takeda: Consultancy, Membership on an entity's Board of Directors or advisory committees; Janssen: Consultancy, Honoraria; Abbvie: Consultancy; Amgen: Consultancy, Membership on an entity's Board of Directors or advisory committees; MMRF: Honoraria; ASH: Honoraria; TRM Oncology: Honoraria; Celgene: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees. Weisel:Amgen, BMS, Celgene, Janssen, and Takeda: Honoraria; Amgen, Celgene, Janssen, and Sanofi: Research Funding; Amgen, BMS, Celgene, Janssen, Juno, Sanofi, and Takeda: Consultancy, Membership on an entity's Board of Directors or advisory committees. Usmani:Abbvie, Amgen, Celgene, Genmab, Merck, MundiPharma, Janssen, Seattle Genetics: Consultancy; Amgen, BMS, Celgene, Janssen, Merck, Pharmacyclics,Sanofi, Seattle Genetics, Takeda: Research Funding. Hungria:Janssen: Honoraria; Amgen: Honoraria; Takeda: Honoraria; Celgene: Honoraria. Boccadoro:Amgen: Honoraria, Research Funding; Sanofi: Honoraria, Research Funding; Janssen: Honoraria, Research Funding; Novartis: Honoraria, Research Funding; AbbVie: Honoraria; Bristol-Myers Squibb: Honoraria, Research Funding; Mundipharma: Research Funding; Celgene: Honoraria, Research Funding. Rifkin:McKesson: Equity Ownership; Boehringer Ingelheim: Consultancy; EMD Serono: Consultancy; Celgene: Consultancy; Takeda: Consultancy; Sandoz: Consultancy; Amgen: Consultancy. Zonder:Takeda: Honoraria; Pharmacyclics: Other: DSMC; Alnylam: Honoraria; Coelum: Honoraria; BMS: Research Funding; Janssen: Honoraria; Celgene: Consultancy, Honoraria. Cook:Amgen, Bristol-Myers Squibb, GlycoMimetics, Celgene, Janssen and Takeda and Sanofi: Honoraria; Celgene, Janssen and Takeda: Research Funding. Ren:Takeda Pharmaceuticals International Co.: Employment. Cacioppo:Millennium Pharmaceuticals, Inc., Cambridge, MA, USA, a wholly owned subsidiary of Takeda Pharmaceutical Company Limited: Employment. Skacel:Millennium Pharmaceuticals, Inc., Cambridge, MA, USA, a wholly owned subsidiary of Takeda Pharmaceutical Company Limited: Employment; Department of Hematology, Charles University General Hospital, Prague, Czech Republic: Other: Affiliation. Stull:Millennium Pharmaceuticals, Inc., Cambridge, MA, USA, a wholly owned subsidiary of Takeda Pharmaceutical Company Limited: Employment. Maisnar:Janssen: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; Celgene: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; Takeda: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; Amgen: Consultancy, Honoraria, Membership on an entity's Board of Directors or advisory committees; BMS: Membership on an entity's Board of Directors or advisory committees.

Description: Abstract 3099 Background: The development of a risk-stratification model that relies on molecular cytogenetic markers to assess disease aggressiveness and provide therapeutic guidance would be beneficial for the management of patients with multiple myeloma (MM). High-risk cytogenetic abnormalities, including deletion 17p (del17p), are known to confer a poor prognosis. Intensified consolidation with high-dose therapy (HDT) and autologous stem cell transplantation (ASCT) following induction therapy has been proposed as the preferred initial treatment for high-risk MM, such as del17p. With this background, we report the impact of del17p on the timing and outcome of transplant in patients with MM. Methods: We performed a retrospective review of 226 patients with MM who underwent HDT/ASCT at the University of California, San Diego Moores Cancer Center between 1/2000 and 7/2011. Conventional cytogenetic analyses were utilized for all patients either at diagnosis or at relapse, but prior to ASCT. Fluorescence in situ hybridization was also assessed when available. The primary objective was to evaluate the impact of del17p, a known high-risk chromosomal abnormality, on the overall survival (OS) and progression-free survival (PFS) after ASCT, compared with patients without chromosomal abnormalities. A secondary objective was to assess the OS and PFS for patients with del17p who received ASCT within a year of diagnosis, compared with those who underwent ASCT more than 12 months from diagnosis. Results: In 226 patients with conventional cytogenetic data prior to ASCT, chromosomal abnormalities were noted in 82 (36%) patients. Of these, 21 (25%) patients harbored a del17p abnormality. Table 1 shows the patient characteristics and ASCT outcomes. Prior to undergoing ASCT, 4 (19%)patients with del17p achieved a complete remission (CR) or stringent complete remission (sCR), and 6 (29%) achieved a CR or sCR after ASCT. In patients without chromosomal abnormalities, 19 (13%) achieved CR or sCR prior to ASCT, and 45 (31%) achieved it after ASCT. Median follow-up of surviving patients was 47 months (range 5–283). Median PFS after ASCT in patients with del17p and normal cytogenetics were 8.3 months (95%CI: 4.6-N/A) and 33 months (95%CI: 21.7–61.8), respectively (HR 2.15, 95%CI: 1.19–3.89; p=0.011) (Figure 1). Median OS after ASCT in patients with del17p and normal cytogenetics were 47.5 months (95%CI: 19.9-N/A) and 68 months (95%CI 51.1-N/A), respectively (HR: 2.27, 95%CI 1.15–4.48; p=0.018) (Figure 2). Median PFS in patients with del17p who received an ASCT after 12 months and within 12 months from diagnosis was 6.13 months (95%CI: 2.7-NA) and 22.6 months (95%CI: 5.4-NA), respectively (HR=1.22, 95%CI 0.40–3.82; p=0.71). Median OS in del17p patients who received an ASCT after 12 months and within 12 months from diagnosis was 65.6 months (95%CI: 19.3-NA) and 47.5 months (95%CI: 19.9-NA), respectively (HR=0.97, 95%CI 0.26–3.62; p=0.96). Conclusions: In this single center study with long follow up, we demonstrate that a del17p abnormality in MM confers a shorter PFS and OS after ASCT. Furthermore, the use of HDT/ASCT as part of the upfront treatment plan within 12 months of diagnosis does not significantly affect the outcome in patients with a del17p abnormality. Further studies are required to better define a risk-stratified treatment plan for this subset of high-risk multiple myeloma. Disclosures: No relevant conflicts of interest to declare.

Description: Introduction Both blinatumomab and lenalidomide have proven, but limited, efficacy in relapsed/refractory (R/R) non-Hodgkin's lymphoma (NHL). Failure of blinatumomab to mediate durable responses is due to its inability to recruit competent cytotoxic T cells which leads to eventual T cell exhaustion. Lenalidomide has been shown to improve efficacy of rituximab through T and NK cell activation even in patients who have previously failed rituximab containing regimens. Based on this, we hypothesized that lenalidomide, when combined with blinatumomab, will enhance its efficacy. We report safety, efficacy and correlative analysis of blinatumomab and lenalidomide in R/R NHL. Methods We conducted a phase I, open-label trial involving patients 18 years and older with R/R CD19+ NHL who have received at least two prior chemotherapeutic or biologic regimens and were not eligible for standard curative options at time of enrollment. Previous CD19-targeted therapy was allowed. Study consisted of a dose escalation followed by a dose expansion phase once the maximum tolerated dose (MTD)/ recommended phase II dose (RP2D) was established using a Phase I Queue modified 3+3 design. The escalation phase has been completed and consisted of blinatumomab continuous infusion (level 1 and 2: 9 mcg/day to 112 mcg/day) from days 1-56 and lenalidomide (level 1: 10 mg and level 2: 20 mg daily) days 29-49 of a 56-day induction cycle. Patients who responded underwent consolidation with blinatumomab continuous infusion days 1-7 and lenalidomide days 1-21 of a 28-day cycle for a maximum of 6 cycles followed by lenalidomide maintenance for 2 years or until unacceptable toxicity or disease progression. Dose limiting toxicities (DLT) included any grade 3/4 drug related adverse events (AE) observed during and up to 7 days after blinatumomab/lenalidomide simultaneous administration. Additional patients were accrued to replace patients who had grade 3/4 AE or progressed before receiving lenalidomide for dose-finding purposes. Primary endpoints included toxicity and determination of the MTD/RP2D during the first 8 weeks of blinatumomab/ lenalidomide induction. Secondary endpoints included overall response rate (ORR), complete response (CR) rate, progression free survival (PFS) which was censored at time of transplant and immune response biomarkers. Results As of July 17, 2019, 18 patients initiated therapy; 7 with diffuse large B cell lymphoma, 3 with mantle cell lymphoma, 3 with follicular lymphoma, 2 with nonspecified B cell lymphoma and 1 each with marginal zone lymphoma, Burkitt's lymphoma and small lymphocytic lymphoma. Median age was 58 (range 30-84) years and the median number of prior regimens was 2.5 (range 2-5); 5 patients had previous stem cell transplant (SCT). 6 patients had disease progression prior to starting lenalidomide. 3 patients received blinatumomab/lenalidomide at dose level 1 with no DLT noted. 9 patients received blinatumomab/lenalidomide at dose level 2 with 4 requiring blinatumomab dose reduction prior to starting lenalidomide. Due to favorable safety profiles with the combination using the MTD/RP2D of lenalidomide 20 daily, upfront doublet therapy was initiated as part of the planned expansion phase. Most common grade 3/4 adverse events were lymphopenia (39%), hypophosphatemia (22%) and hyponatremia (11%). 1 patient (5.5%) experienced grade 3 neurotoxicity. No grade 3/4 cytokine release syndrome or treatment related deaths were seen. At time of data cutoff, three patients remain on active treatment. At a median follow-up time of 14.3 months, ORR was 56% for all patients and 83% (50% CR) for those who received blinatumomab/lenalidomide combination therapy. Median PFS was 3.8 months (95% CI, 1.1 to NR) for all patients and 8.3 months (95% CI, 2.2 to NR) for those who received blinatumomab/lenalidomide combination therapy. 3 patients who achieved response underwent allogeneic SCT and remained in remission for 14.2 to 22.3 months thereafter. Correlative studies are pending and will be reported at time of presentation. Conclusions The combination of blinatumomab and lenalidomide, given at the RP2D dose of 20 mg daily, is safe and well tolerated. This regimen demonstrates encouraging efficacy in this heavily pretreated patient population and is a promising alternative treatment option for R/R NHL patients who are not candidates for aggressive cytotoxic chemotherapy or as a bridge to allogeneic SCT. Disclosures Abedi: Abbie: Speakers Bureau; Takeda: Speakers Bureau; BMS: Speakers Bureau; Celgene: Speakers Bureau; Gilead: Speakers Bureau. Costello:Takeda: Honoraria, Research Funding; Janssen: Research Funding; Celgene: Consultancy, Honoraria, Research Funding. Zain:Seattle Genetics: Consultancy; Spectrum: Consultancy. Budde:F. Hoffmann-La Roche Ltd: Consultancy. William:Defined Health: Consultancy; Techspert: Consultancy; Celgene Corporation: Consultancy; Kyowa Kirin, Inc.: Consultancy; Guidepoint Global: Consultancy. Foss:Spectrum: Other: fees for non-CME/CE services ; Acrotech: Consultancy; miRagen: Consultancy; Eisai: Consultancy; Mallinckrodt: Consultancy; Seattle Genetics: Consultancy, Other: fees for non-CME/CE services . Jonas:AbbVie, Accelerated Medical Diagnostics, AROG, Celgene, Daiichi Sankyo, Esanex, Forma, Genentech/Roche, GlycoMimetics, Incyte, LP Therapeutics, Pharmacyclics: Research Funding; AbbVie, Amgen, Celgene, GlycoMimetics, Jazz, Pharmacyclics, Tolero: Consultancy, Membership on an entity's Board of Directors or advisory committees; AbbVie, Amgen, GlycoMimetics: Other: Travel expenses. Rosenberg:Amgen: Consultancy, Research Funding. Tuscano:Seattle Genetics: Honoraria; Amgen: Honoraria; Celgene: Honoraria, Research Funding; Novartis: Research Funding; Spectrum: Research Funding; Takada: Research Funding; Abbvie: Research Funding; Genentech: Research Funding; Pharmacyclics: Research Funding. OffLabel Disclosure: The use of blinatumomab and lenalidomide in patients with aggressive lymphoma

Description: INTRODUCTION Representing ten percent of all hematologic malignancies, multiple myeloma (MM) is typified by clonal plasma cell proliferation in the bone marrow (BM) and may progress to a therapy-resistant stage characterized by circulating malignant plasma cells, which is termed plasma cell leukemia, (PCL). Notably, copy number amplification involving the myeloid cell leukemia (MCL)-1 locus, and translocations at the BCL2 locus have been described in high-risk MM. Moreover, BCL2 family members, including both MCL1 and BCL2, are highly expressed in relapsed MM. Finally, downregulation of BCL2 family members was reported to increase sensitivity to lenalidomide, a standard treatment for MM, suggesting that BCL2-targeted treatments may obviate therapeutic resistance.Sabutoclax, a potent small molecule inhibitor of 6 anti-apoptotic BCL2 family proteins, was shown to inhibit cancer stem cell (CSC) survival in chronic myeloid leukemia (CML) (Goff et al Cell Stem Cell 2013). Thus, we investigated BCL2 pro-survival splice isoform expression in therapy-resistant MM and PCL and evaluated whether Sabutoclax reduces malignant plasma cell burden in humanized primagraft assays. METHODS AND RESULTS BCL2 pro survival expression in primary myeloma samples Mononuclear cells from MM or PCL samples were isolated by Ficoll-Paque density gradient separation and collected for RNA extraction or FACS Aria purified into CD138+ or CD34-/CD138- cancer stem cells (CSC) subsets. To evaluate BCL2 pro-survival family member expression, splice isoform-specific quantitative PCR was performed to measure expression of pro-survival long isoforms compared with short splice isoforms, which are pro-apoptotic. Interestingly, MM and PCL patients displayed higher levels of BCL2-L, MCL1-L, BCLX-L and BLF1-L compared to normal controls. Moreover, prolonged lenalidomide exposure increased BCL2-L and MCL1-L expression in the myeloma cell line H929, compared to untreated cells. Sabutoclax Treatment of a Novel Humanized Plasma Cell Leukemia Primagraft Model Mononuclear cells from three primary PCL patient samples were stably transduced with a GFP-luciferase lentiviral vector and transplanted intrahepatically in newborn RAG2γ-/- c-/- mice. Engraftment was monitored by peripheral blood free light chain ELISA assays. Flow cytometric analyses revealed robust engraftment of PCL cells in bone marrow, spleen, liver and peripheral blood. Once transplanted mice displayed significant tumor burden above background free light chain levels, animals were randomized by ELISA values in vehicle versus Sabutoclax groups. Sabutoclax was selected because this pan-BCL2 targeted compound, unlike related BCL2 inhibitors such as ABT-199, also inhibits MCL1. Sabutoclax (10mg/kg) was administered intravenously twice weekly for two to four doses. Sabutoclax treated PCL mice showed reduced human plasma cell burden in bone marrow and spleen tissues compared to vehicle controls. CONCLUSION Expression of pro-survival BCL2 splice isoforms, including BCL2-L and MCL1-L, portends PCL engraftment in immunocompromised mice. Treatment of human PCL engrafted mice with Sabutoclax reduces malignant plasma cell survival in hematopoietic tissues. Thus, selective targeting of pro-survival isoform expressing CSC with a pan-BCL2 inhibitor may abolish BCL2 and MCL1-dependent therapeutic resistance in MM and PCL. Disclosures Jamieson: GlaxoSmithKline: Research Funding; Johnson & Johnson: Research Funding.

Description: Introduction: The rapid technological advances in next generation sequencing (NGS) have allowed oncologists to sequence tumorexomesin a clinically meaningful period of time. NGS allows for identification of alterations that may be potentially targetable by already available Food and Drug Administration (FDA) approved drugs, providing a biologic rational for consideration of therapies and/or experimental treatments (clinical trials) that would not have otherwise been contemplated. Here we report our experience using NGS in a cohort of 60 patients with various lymphoid malignancies. Methods: We retrospectively reviewed the medical charts of 60 patients with various lymphoid malignancies who had undergone NGS. Patients were seen at the UCSD Moores Cancer Center (La Jolla, CA) from October 2012 until March 2016. We collected tumor samples from tissue (Table 1) or peripheral blood from 60 patients that were submitted for testing to Foundation Medicine, a clinical laboratory improvement amendments (CLIA)-certified lab. Hybrid capture based NGS (405 gene panel) was performed (http://www.foundationone.com/). The methods used in this assay have been described in detail in a previous report (He, J. et al. Integrated genomic DNA/RNA profiling of hematologic malignancies in the clinical setting. Blood. 2016. 127:3004-3014.). Results: Sixty patients including 35 men (58%) and 25 women (42%), were identified with lymphoid malignancies (Table 1). A total of 224 alterations were found by NGS in the entire cohort of 60 individuals. Types of alterations identified included substitutions, indels, copy number alterations (CNAs), and gene fusions. Figure 1 demonstrates the 15 most frequent alterations among the cohort: TP53 mutations (10 patients), IGH rearrangements (9 patients), loss of CDKN2A/B (8 patients), and BCL2 mutations (8 patients). The median number of alterations detected per patient was 3 (range, 0 to 14). Shown in Figure 2, 7 patients (12%) had no reportable alterations, 10 patients (17%) had 1 alteration, and 43 (71%) patients had 2 or more alterations. The maximum number of alterations identified was 14, which occurred in two patients (3%), one with chronic lymphocytic leukemia (CLL) and the other with diffuse large B-cell lymphoma (DLBCL). A total of 49 patients (82%) had potentially actionable alterations using FDA approved drugs and/or experimental therapies (clinical trials) while 11 patients (18%) had no theoretically actionable alterations. Only 3 patientshad an alteration for which an approved drug in the disease is available (on-label) while 45 patients (75%) had an alteration for which an approved drug is available in another disease (off-label). Twenty-three patients (38%), 12 patients (20%), and 10 patients (17%) had 1, 2 and³ 3 FDA targetable alterations, respectively. The median number of theoretical FDA actionable alterations was 1. Conclusions:Most patients with lymphoid malignancies will have alterations that are potentially pharmacologically identified by NGS; however, only a minority of patients will have alterations for which an approved drug in the disease is available (on-label). Patients with lymphoid malignancies who have exhausted standard therapy or who are unable to tolerate chemotherapy may be excellent candidates for matched targeted therapies, ideally administered in the context of a clinical trial. Figure 1 The blue bars represent the number of patients with the designated number of total alterations. The red bars represent the number of patients with the designated number of potentially actionable alterations by an FDA approved drug (on or off label). Figure 1. The blue bars represent the number of patients with the designated number of total alterations. The red bars represent the number of patients with the designated number of potentially actionable alterations by an FDA approved drug (on or off label). Figure 2 Figure 2. Disclosures Goodman: Pfizer: Other: Fellowship funding. Costello:Takeda: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding; Janssen: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding, Speakers Bureau; Celgene: Honoraria, Membership on an entity's Board of Directors or advisory committees, Research Funding. Kurzrock:Serono: Research Funding; Pfizer: Research Funding; Merck: Research Funding; Actuate Therapeutics: Research Funding; Sequenom: Research Funding; X Biotech: Research Funding; Genentech: Research Funding; Curematch: Equity Ownership; Novena: Equity Ownership.