scholarly journals ATG-010 Plus Low-Dose Dexamethasone (Sd) in Chinese Relapsed/Refractory Multiple Myeloma (RRMM) Patients Previously Received Chimeric Antigen Receptor T-Cell (CAR-T)

Blood ◽  
2021 ◽  
Vol 138 (Supplement 1) ◽  
pp. 4778-4778
Author(s):  
Weijun Fu ◽  
Lugui Qiu ◽  
Zhongjun Xia ◽  
Zhengzheng Fu ◽  
Wenming Chen ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
T Cell ◽  
Adverse Events ◽  
Disease Progression ◽  
Median Duration ◽  
Nuclear Export ◽  
Low Dose ◽  
Small Sample ◽  
T Cell Therapy ◽  
Car T

Abstract Background: There are limited treatment options for multiple myeloma (MM) patients who have a disease progression after CAR-T therapy. ATG-010 (selinexor) is a novel, oral selective inhibitor of nuclear export, inhibiting exportin 1. US FDA has approved selinexor plus low dose dexamethasone (Sd) to treat patients (pts) with penta-refractory MM. MARCH study, a single arm, Phase 2, registrational study evaluating Sd in Chinese RRMM pts, achieved an overall response rate (ORR) of 29.3% (95% CI: 19.7, 40.4), rejecting the null hypothesis of the study. Given its unique and novel mechanism of action, Sd preserves anti-tumor activity regardless of specific prior therapies. In the MARCH study, encouraging activity was demonstrated in a small group of Chinese RRMM pts previously exposed to CAR-T therapy. Methods: The study enrolled 82 pts previously exposed and refractory to a proteasome inhibitor (PI), an immunomodulatory agent (IMiD), and last line of therapy. Among them, 10 had received lymphodepleting conditioning followed by CAR-T cell therapy before study screening. ATG-010 (80mg) plus dexamethasone (20mg) was administered orally twice weekly. Response was assessed by an independent review committee. Results: Among 10 pts, 8 were male and 2 were female. Median age was 58.5 years. Median duration from MM initial diagnosis was 5.2 years. A total of 6 pts (60.0%) had high-risk cytogenetic abnormalities, including 4 pts (40.0%) with del (17p). Three pts had baseline plasmacytoma. Five pts (50%) experienced very rapid disease progression as indicated by a median of 46.2% increase of tumor burden from screening to Cycle 1 Day 1. Patients were heavily pre-treated with a median of 9.5 prior regimens (range: 5-12), with 8 receiving more than 6 regimens. Four pts were exposed to daratumumab (triple-class exposure). ORR was 50% including 1 very good partial response and 4 partial responses. Disease control rate defined as SD and above was 70%. Median duration of response was 1.4 months (mo) (95% CI: 0.96, NE). Median progression free survival was 1.9 mo (95% CI: 0.93, 3.74). xx pts (xx%) pts died; median overall survival was not reached, and estimated 12-mo OS rate was 68.6%. Adverse events were consistent with those events previously reported with Sd regimen in RRMM patients. The most common grade≥3 treatment emergent adverse events (TEAEs) included anemia, thrombocytopenia, neutropenia and nausea. Most events were manageable with appropriate supportive care or dose modification. Four pts (40%) experienced TESAEs, including anemia, pneumonia, neutropenia, and upper gastrointestinal hemorrhage. There were no TEAEs leading to treatment discontinuation or death. Conclusions: Sd was able to induce an encouraging response with a manageable safety profile for a group of Chinese RRMM patients desperately needing treatment after failing CAR-T therapy. With the small sample size, further investigation is warranted, including using ATG-010 in combination with other anti-MM therapies to potentially enhance and prolong therapeutic benefit. Disclosures Yu: Antengene Therapeutics Ltd.: Current Employment. Wang: Antengene Therapeutics Ltd.: Current Employment. Yu: Antengene Therapeutics Ltd.: Current Employment. Yang: Antengene Therapeutics Ltd.: Current Employment. Lynch: Antengene Therapeutics Ltd.: Current Employment.

137 Genomics of multiple myeloma influences the expression of CAR T-cell targets

2020 ◽  
Vol 8 (Suppl 3) ◽  
pp. A150-A150
Author(s):  
Christina Yu ◽  
Brian Walker ◽  
G David Roodman ◽  
Kun Huang ◽  
Michel Sadelain ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
T Cell ◽  
High Risk ◽  
Cell Surface ◽  
T Cell Therapy ◽  
Genomic Features ◽  
Car T Cell ◽  
Car T Cell Therapy ◽  
Car T ◽  
Risk Patients

BackgroundMultiple Myeloma (MM) is an incurable disease, with a particularly poor prognosis for patients with refractory/relapsed MM or high-risk cytogenetics. Chimeric Antigen Receptor (CAR) T-cell therapy targeting BCMA can induce deep responses in highly pretreated RRMM; however, remissions are not sustained, and the majority of patients eventually relapse. We hypothesized that genomic determinants of MM play a role in dictating the expression of surface targets that can be of use for immune targeting.MethodsWe analyzed the gene expression of 24 immunotherapeutic targets in a combined dataset of 1900 MM patients from three independent expression datasets obtained from the Multiple Myeloma Research Foundation CoMMpass study and Gene Expression Omnibus. Given that CAR T-cell therapy may be especially important for patients with high-risk myeloma, we defined the expression of each target in high-risk MM patients by stratifying patients based on several genomic features impacting prognosis. Additionally, we conducted a gene co-expression network analysis and identified 30 gene modules highly correlated with 16 cell surface targets from our panel, further suggesting that genetic determinants of MM may shape a targetable cell surfaceome. In order to determine whether targeting any of these candidate antigens might cause major toxicity to normal cells, we utilized several repositories providing protein data1 to annotate their expression in several normal cell types.ResultsWe determined that a number of genomic factors could stratify the 24 targets into three general groups: 1) targets that show consistent overexpression in high-risk patients: IGF1R, ITGB7, GPRC5D and CD70, and are thus suitable for most high-risk patients; 2) targets that are down-regulated in patients with high-risk genomic features: CD200, CD19, CD40, CD1D and IGKC, perhaps playing a role in cancer immune escape; and 3) targets associated with one specific genetic abnormality, i.e. t(4;14): FUT3, SLAMF7, CD56, CD138 and BCMA, thus of use for precision CAR therapy in this high-risk patient subset.ConclusionsOur work provides a means of target selection for precision CAR therapy, by considering both patient genomic backgrounds and cancer cell surface profiles. Furthermore, our results provide a roadmap for immunotherapy of MM by unbiasedly comparing the expression of top MM cell surface targets in patient data and normal cells and suggest that the genetic landscape of MM may predict the expression of specific targets for precision immunotherapy. The quest for novel MM targets for immunotherapies remains open, and CAR target discovery driven by specific genetic events remains an active area of investigation.ReferencePerna F, Berman SH, Soni RK, et al. Integrating proteomics and transcriptomics for systematic combinatorial chimeric antigen receptor therapy of AML. Cancer Cell 2017;32(4):506–19.

scholarly journals GPRC5D is a target for the immunotherapy of multiple myeloma with rationally designed CAR T cells

2019 ◽  
Vol 11 (485) ◽  
pp. eaau7746 ◽  
Author(s):  
Eric L. Smith ◽  
Kim Harrington ◽  
Mette Staehr ◽  
Reed Masakayan ◽  
Jon Jones ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
T Cells ◽  
T Cell ◽  
Cell Therapy ◽  
B Cell ◽  
T Cell Therapy ◽  
Car T Cells ◽  
Car T Cell Therapy ◽  
Car T

Early clinical results of chimeric antigen receptor (CAR) T cell therapy targeting B cell maturation antigen (BCMA) for multiple myeloma (MM) appear promising, but relapses associated with residual low-to-negative BCMA-expressing MM cells have been reported, necessitating identification of additional targets. The orphan G protein–coupled receptor, class C group 5 member D (GPRC5D), normally expressed only in the hair follicle, was previously identified as expressed by mRNA in marrow aspirates from patients with MM, but confirmation of protein expression remained elusive. Using quantitative immunofluorescence, we determined that GPRC5D protein is expressed on CD138+ MM cells from primary marrow samples with a distribution that was similar to, but independent of, BCMA. Panning a human B cell–derived phage display library identified seven GPRC5D-specific single-chain variable fragments (scFvs). Incorporation of these into multiple CAR formats yielded 42 different constructs, which were screened for antigen-specific and antigen-independent (tonic) signaling using a Nur77-based reporter system. Nur77 reporter screen results were confirmed in vivo using a marrow-tropic MM xenograft in mice. CAR T cells incorporating GPRC5D-targeted scFv clone 109 eradicated MM and enabled long-term survival, including in a BCMA antigen escape model. GPRC5D(109) is specific for GPRC5D and resulted in MM cell line and primary MM cytotoxicity, cytokine release, and in vivo activity comparable to anti-BCMA CAR T cells. Murine and cynomolgus cross-reactive CAR T cells did not cause alopecia or other signs of GPRC5D-mediated toxicity in these species. Thus, GPRC5D(109) CAR T cell therapy shows potential for the treatment of advanced MM irrespective of previous BCMA-targeted therapy.

A phase 1 multicenter study evaluating KITE-585, an autologous anti-BCMA CAR T-cell therapy, in patients with relapsed/refractory multiple myeloma.

2018 ◽  
Vol 36 (15_suppl) ◽  
pp. TPS3103-TPS3103 ◽  
Author(s):  
Robert F. Cornell ◽  
Frederick Lundry Locke ◽  
Michael Russell Bishop ◽  
Robert Z. Orlowski ◽  
Sarah Marie Larson ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
T Cell ◽  
Cell Therapy ◽  
Multicenter Study ◽  
Phase 1 ◽  
T Cell Therapy ◽  
Refractory Multiple Myeloma ◽  
Car T Cell ◽  
Car T Cell Therapy ◽  
Car T

scholarly journals XPO1 Inhibitor (ATG-010) Plus Chemotherapy per Investigator's Choice for Heavily Pretreated Patients with Relapsed or Refractory (R/R) Peripheral T-Cell Lymphoma (PTCL) and Extranodal NK/T-Cell Lymphoma (ENKTL)：Preliminary Results from a Multicenter, Single-Arm, Phase Ib Study (TOUCH Trial)

Blood ◽  
2021 ◽  
Vol 138 (Supplement 1) ◽  
pp. 2452-2452
Author(s):  
Huiqiang Huang ◽  
Yan Gao ◽  
Huilai Zhang ◽  
Keshu Zhou ◽  
Jianqiu Wu ◽  
...  
Keyword(s):  
T Cell ◽  
Adverse Events ◽  
Disease Progression ◽  
Nuclear Export ◽  
Cell Lymphoma ◽  
Fatal Outcome ◽  
T Cell Lymphoma ◽  
Clinical Activity ◽  
Heavily Pretreated ◽  
Grade 3

Abstract Background The prognosis of R/R PTCL and ENKTL remains poor. Current therapeutic options are limited, highlighting the need for novel approaches. ATG-010 (selinexor) is a novel, oral selective inhibitor of nuclear export, which blocks exportin 1. It has demonstrated clinical activity in different hematological malignancies. Preclinical synergistic anti-tumor effects are confirmed when combined with gemcitabine, cisplatin, or etoposide. Method The aim of this study was to evaluate safety and efficacy of ATG-010 plus GemOx or ICE regimen followed by ATG-010 maintenance in patients (pts) with R/R PTCL or ENKTL in China. The study planned to enroll 30 pts with PTCL-NOS, AITL, ALCL, PTCL-TFH, FTL and ENKTL. Pts must have had prior exposure to an anthracycline-based regimen for PTCL or an asparaginase-based regimen for ENKTL, and were relapsed or refractory from the last therapy. ATG-010 was administered orally (60 mg day 1, 8) plus standard-dose of either ICE or GemOx regimen every 3 weeks as per investigator's choice. If response was achieved after initial 2-6 cycles, pts continued to receive ATG-010 maintenance at the dose of 60 mg weekly until disease progression, intolerability or withdrawal of consent. Primary endpoints included safety according to the NCI CTCAE 5.0 and overall response rate (ORR) evaluated by investigators according to the Lugano criteria (2014). Secondary endpoints included duration of response (DOR), progression-free survival (PFS) and overall survival (OS). This trial was registered at ClinicalTrials.gov (NCT04425070). Results From Aug 18, 2020 to June 25, 2021, 24 pts (20 in GemOx cohort, 4 in ICE cohort) were enrolled and received at least one cycle of treatment. In this abstract, we report results of the GemOx cohort with 9 (45%) PTCL-NOS, 6 (30%) ENKTL, 4 (20%) AITL, and 1 (5%) ALCL ALK-. At study entry, median age was 55 years (range 35-69); 17 (85%) had stage III/IV disease. Five (36%) pts with PTCL had IPI score ≥3, and 5 (83%) ENKTL pts with had PINK-E score ≥2. Median number of prior regimens was 3.5 (range 1-7) with 5.5 for ENKTL and 2 for PTCL. All pts were refractory from last therapy; 11 (55%) pts had received gemcitabine-based regimens. Median time from last-line therapy to this trial was 1.5 months (range 1.0-16.7). The most common treatment-emergent adverse events (TEAEs) were hematological toxicities. All grade hematological TEAEs were neutropenia (90%), thrombocytopenia (90%) and anemia (85%). Grade≥3 hematological TEAEs included neutropenia (85%), thrombocytopenia (80%) and anemia (40.0%). The most common (>30%) non-hematological TEAEs were nausea (70%), diarrhea (65%), decreased appetite (65%), asthenia/fatigue (60%), vomiting (50%), pyrexia (40%), and hyponatremia (35%). Grade≥3 non-hematological TEAEs (≥10%) were diarrhea (15%) and pyrexia (10%). Serious TEAEs occurred in 7 (35%) pts with the most common being thrombocytopenia (20%). Three (15%) pts discontinued treatment due to TEAEs. TEAEs with a fatal outcome occurred in 1(5%) patient, who experienced rapid disease progression before death. The majority of adverse events were manageable by dose modification and supportive care. Of 17 efficacy evaluable pts, ORR was 52.9% (9/17), and CR rate was 35.3% (6/17). ORR of PTCL-NOS, ENKTL, AITL, ALCL were 62.5% (5/8), 60% (3/5), 0 (0/3), 100% (1/1); CR rate were 37.5%, 40%, 0, 100%, respectively. At a median follow-up of 6.1months, median PFS, DOR and OS of the whole cohort was 2.9, 3.1 months, and not reached (6-month OS rate 68.9%), respectively. Patients with ENKTL enjoyed a relatively longer median PFS (4.7 months). Conclusions ATG-010 plus GemOx regimen showed a manageable safety profile, and favorable activity with impressive CR rate in refractory pts, potentially offering a new therapeutic option for heavily pretreated pts with refractory PTCL or ENKTL. Disclosures Lou: Antengene Therapeutics Ltd.: Current Employment. Fei: Antengene Therapeutics Ltd.: Current Employment. Wang: Antengene Therapeutics Ltd.: Current Employment. Lynch: Antengene Therapeutics Ltd.: Current Employment.

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