Leukemia is a type of blood cancer of the bone marrow and blood-forming cells. The result is the production of abnormal blood cells, mostly the white blood cells. Leukemia is divided into several types based on the speed of growth and the types of cells the cancer starts in (myeloid cells vs lymphoid cells). Fast-growing leukemias are considered to be acute. Slower growing leukemias are considered to be chronic. The classifications of leukemias include acute lymphocytic leukemia (ALL), acute myelogenous leukemia (AML), chronic lymphocytic leukemia (CLL), and chronic myelogenous leukemia (CML). ALL and AML are the two most common types of leukemia found in children. AML and CLL are the two most common types of leukemia found in adults. Treatment includes a combination of chemotherapy, biologicals, radiation therapy, and hematopoietic stem cell transplantation (HSCT).
Lymphoma is also a blood cancer, but is a cancer of the lymphatic system. Lymphomas account for approximately half of all blood cancers that occur yearly. Lymphomas are divided into two categories: Hodgkin lymphomas (HLs) and non-Hodgkin lymphomas (NHLs). NHLs are differentiated as being T-cell lymphomas or B-cell lymphomas (BCLs). The majority of NHLs are BCLs and can be categorized as either high-grade cancers that grow quickly or low-grade cancers that grow slowly. The list of BCLs is numerous and includes diffuse large B-cell lymphoma (DLBCL), primary mediastinal BCL, follicular lymphoma (FL), small lymphocytic lymphoma (SLL; this type of cancer is so closely related to CLL that they are treated the same), mantle cell lymphoma (MCL), and marginal zone lymphoma (MZL; these include extranodal marginal zone BCL [also known as mucosa-associated lymphoid tissue lymphoma or MALT; can either be gastric or non-gastric], nodal marginal zone BCL, or splenic marginal zone BCL). Like leukemias, treatment includes a combination of chemotherapy, biologicals, radiation therapy, and HSCT.
Axicabtagene ciloleucel (Yescarta), brexucabtagene autoleucel (Tecartus), lisocabtagene maraleucel (Breyanzi), tisagenlecleucel (Kymriah), and obecabtagene autoleucel (Aucatzyl) are all autologous, cluster of differentiation (CD)19-directed chimeric antigen receptor T-cell (CART) therapies. CART therapy is a method whereby the T cells (a type of white blood cell) are altered in a laboratory to enable them to find and destroy cancer cells or other disease-producing cells. Each dose of CART is customized to the individual and their cancer or disease. The individual's T cells are collected during a process called leukapheresis; the cells are then sent to a manufacturing center where they are genetically modified to include a new chimerica antigen receptor (CAR) gene. The modified T cells target and bind to the specific protein on the surface of the antigen causing the cancer or disease and trigger the individual’s own immune system to help destroy the target. Prior to initiating the CART infusion, individuals undergo lymphodepleting chemotherapy to reduce the level of white blood cells and help the body accept the reprogrammed CAR T cells.
AXICABTAGENE CILOLEUCEL (YESCARTA)
On October 18, 2017, the US Food and Drug Administration (FDA) approved axicabtagene ciloleucel (Yescarta) for the treatment of adult individuals with relapsed or refractory (R/R) large B-cell lymphoma after two or more lines of therapy. Axicabtagene ciloleucel (Yescarta) is the second cluster of differentiation (CD)19-directed genetically modified autologous T-cell immunotherapy available in the United States. Like tisagenlecleucel (Kymriah), axicabtagene ciloleucel (Yescarta) is customized to the individual after the T cells are harvested. The T cells are genetically modified to express a chimeric antigen receptor that targets CD19-expressing cells.
The safety and efficacy of axicabtagene ciloleucel (Yescarta) for the treatment of adult individuals with R/R B-cell NHL were evaluated in a single arm, open-label, multicenter trial, phase 1/2 trial (ZUMA-1; NCT02348216). Individuals eligible for the trial had refractory disease to the most recent therapy or relapse within 1 year of autologous HSCT. The primary endpoint was objective response rate (ORR). Key secondary endpoints included duration of response (DOR) and safety data. Of the 101 individuals who received the axicabtagene ciloleucel (Yescarta) infusion, the ORR was 82% (95% confidence interval [CI], 73–89) with 54% achieving a complete remission (CR) and 28% achieving a partial remission (PR). At the median follow-up of 7.9 months, individuals in CR had not reached the estimated DOR. Grade 3 or higher adverse events occurred in 95% of the individuals. Grade 3 or higher cytokine-release syndrome (CRS) occurred in 17% of individuals and grade 3 or higher neurologic events occurred in 28% of individuals. There were four deaths, two of which were believed to be related to the infusion. A long-term follow-up for a median of 27.1 months (range, 25.7–28.8) was also published. The ORR was now 83%, with a CR of 58% and PR of 25%. The median DOR was 11.1 months (95% CI, 4 to not estimable). The median PFS was 5.9 months (95% CI, 3.3–15.0). The median overall survival (OS) was not reached (95% CI, 12.8 to not estimable). No participants were lost to follow-up.
The safety and efficacy of axicabtagene ciloleucel (Yescarta) for the treatment of adult individuals with R/R indolent NHL, including FL and MZL, were evaluated in a single-arm, open-label, multicenter, phase 2 trial (ZUMA-5; NCT03105336). Individuals eligible for the trial had indolent NHL, including FL and nodal or extranodal MZL, that was R/R after two or more previous lines of therapy. Exclusion criteria included autologous HSCT within the previous 6 months, previous allogeneic HSCT, previous CD19-targeted therapy, or previous CART therapy. Disease assessments via positron emission tomography–computed tomography (PET-CT) or CT were performed by the investigators and an independent review committee. The primary endpoint of the trial was ORR. Key secondary endpoints included DOR, PFS, OS, and safety. A total of 153 individuals underwent leukapheresis and 148 were transfused with axicabtagene ciloleucel (Yescarta). The median follow-up was 17.5 months (range, 14.1–22.6). Of 109 individuals who were able to be assessed in the updated analysis, the ORR was 92% [95% CI, 85–97]) with 83 individuals (76%) having a CR. At a cutoff of 18 months, the estimated PFS rate was 64.8% (95% CI, 54.2–73.5). DOR was not reached. At the 18-month cutoff, the OS rate was 87.4% (95% CI, 79.2–92.5). Among all individuals who were transfused with axicabtagene ciloleucel (Yescarta), 147 (99%) experienced treatment-emergent adverse events with 128 (86%) experiencing grade 3 or higher events. CRS occurred in 121 individuals (82%) with grade 3 or higher occurring in 10 individuals (7%). Neurological events occurred in 87 individuals (59%) with grade 3 or higher occurring in 28 individuals (19%). Nineteen individuals died after transfusion with axicabtagene ciloleucel (Yescarta), but only one death was believed to be caused by the infusion.
The safety and efficacy of axicabtagene ciloleucel (Yescarta) for the treatment of adult individuals with R/R large B-cell lymphoma versus standard of care (SOC) were evaluated in a randomized, open-label, multicenter, phase 3 trial (ZUMA-7; NCT03391466). Individuals with large B-cell lymphoma that had become R/R after no more than 12 months after receiving first-line chemoimmunotherapy were randomly assigned in a 1:1 ratio to receive either axicabtagene ciloleucel (Yescarta) or SOC therapy (two or three cycles of investigator-selected, protocol-defined chemoimmunotherapy; if the individual responded to the chemoimmunotherapy, they received high-dose chemotherapy and autologous HSCT). The primary endpoint of the trial was event-free survival (EFS) based on assessment by a blinded central reviewer. Key secondary endpoints included OS and response to the treatment. In the trial, 180 individuals were randomly assigned to the axicabtagene ciloleucel (Yescarta) cohort and 179 individuals into the SOC cohort. At a median follow-up of 24.9 months, the median EFS in the axicabtagene ciloleucel (Yescarta) cohort was 8.3 months versus 2.0 months in the SOC cohort. The 24-month EFS was 41% in the axicabtagene ciloleucel (Yescarta) cohort versus 16% in the SOC cohort (hazard ratio [HR] for event/death, 0.40; 95% CI, 0.31–0.51; P<0.001). The OS rate at 24 months was 61% in the axicabtagene ciloleucel (Yescarta) cohort and 52% in the SOC cohort. A response occurred in 83% of individuals in the axicabtagene ciloleucel (Yescarta) cohort and 50% of individuals in the SOC cohort, with a complete response occurring in 65% of individuals in the axicabtagene ciloleucel (Yescarta) cohort versus 32% in the SOC cohort. Grade 3 or higher adverse events occurred in 91% of individuals in the axicabtagene ciloleucel (Yescarta) cohort and 83% of the SOC cohort. Grade 3 or higher CRS occurred in 6% and grade 3 or higher neurological event occurred in 21% of individuals receiving axicabtagene ciloleucel (Yescarta), but no deaths related to either CRS or neurologic events were reported.
BREXUCABTAGENE AUTOLEUCEL (TECARTUS)
On July 24, 2020, the FDA approved brexucabtagene autoleucel (Tecartus) for the treatment of adult individuals with R/R MCL. Brexucabtagene autoleucel (Tecartus) is a CD19-directed genetically modified autologous T-cell immunotherapy that is customized to the individual after the T cells are harvested. The T cells are genetically modified to express a chimeric antigen receptor that targets CD19-expressing cells.
The safety and efficacy of brexucabtagene autoleucel (Tecartus) for the treatment of adult individuals with R/R MCL, who had previously received anthracycline- or bendamustine-containing chemotherapy, an anti-CD20 antibody, and a Bruton tyrosine kinase (BTK) inhibitor (ibrutinib or acalabrutinib), were evaluated in a single-arm, open-label, multicenter phase 2 trial (ZUMA-2; NCT02601313). Eligible individuals had disease progression after their last regimen or refractory disease to their most recent therapy. Seventy-four individuals were enrolled. Brexucabtagene autoleucel (KTE-X19) was manufactured for 71 individuals and administered to 68. The primary efficacy analysis showed that 93% (95% CI, 84–98) had an objective response as assessed by an independent radiologic review committee, with 67% (95% CI, 53–78) having a CR. At a median follow-up of 12.3 months (range, 7.0–32.3), 57% of the 60 individuals in the primary efficacy analysis were in remission. At 12 months, the estimated PFS and OS were 61% and 83%, respectively. Common adverse events of grade 3 or higher were cytopenias (in 94% of the individuals) and infections (in 32%). Grade 3 or higher CRS and neurologic events occurred in 15% and 31% of individuals, respectively; none were fatal.
The safety and efficacy of brexucabtagene autoleucel (Tecartus) for the treatment of adult individuals with ALL were evaluated in a single-arm, open-label, multicenter, phase 1/2 trial (ZUMA-3; NCT02614066). Individuals were eligible for treatment if they had primary refractory ALL, had a first relapse after a remission that lasted 1 year or less, had R/R ALL after second- or higher line of therapy, or R/R ALL 100 days or more after allogeneic HSCT). Seventy-one individuals were enrolled. Brexucabtagene autoleucel (KTE-X19) was manufactured for 65 individuals and administered to 55. The primary endpoint was the rate of overall CR or CR with incomplete hematological recovery by central assessment. Fifty-six percent of the individuals achieved a CR (95% CI, 37.8–65.7) and 15% of the individuals achieved a CR with incomplete hematological recovery. Median OS was 18.2 months in the treated individuals and was not reached in individuals who responded to the treatment. All the treated individuals experienced at least one adverse event. Grade 3 or higher cytopenia occurred in 76% of individuals, CRS occurred in 89% of individuals, and neurological events occurred in 60% of individuals. Six of the treated individuals (11%) died secondary to grade 5 adverse events, with two of these believed to be treatment related.
LISOCABTAGENE MARALEUCEL (BREYANZI)
On February 5, 2021, the FDA approved lisocabtagene maraleucel (Breyanzi) for the treatment of adult individuals with R/R large B-cell lymphoma after two or more lines of systemic therapy, including DLBCL not otherwise specified (including DLBCL arising from indolent lymphoma), high-grade B-cell lymphoma, primary mediastinal large B-cell lymphoma, and FL grade 3B. Lisocabtagene maraleucel (Breyanzi) is a CD19-directed genetically modified autologous T-cell immunotherapy. During the lisocabtagene maraleucel (Breyanzi) manufacturing process, CD8+ and CD4+ T cells are selected from leukapheresis material and then independently activated, transduced, and expanded. Both of these are then infused into the individual.
The safety and efficacy of lisocabtagene maraleucel (Breyanzi) for the treatment of adult individuals with R/R large B-cell lymphoma after two or more lines of systemic therapy were evaluated in a single-arm, open-label, multicenter phase 1 trial (TRANSCEND-NHL-001; NCT02631044). Primary endpoints were ORR assessed by an independent review committee, adverse events, and dose-limiting toxicities. A total of 344 individuals underwent leukapheresis, with 269 individuals being transfused with target doses of 50 ×106 CAR T cells (one or two doses), 100 × 106 CAR T cells, or 150 × 106 CAR T cells and 25 individuals received an infusion of a nonconforming CAR T-cell product (i.e., one component did not meet criteria). At a median follow-up of 18.8 months (95% CI, 15.0–19.3) an ORR was achieved by 186 individuals (73%; 95% CI, 66.8–78.0; P<0.0001) in the efficacy-evaluable set (256 individuals who had received the infusion and had PET-positive disease) with a CR being achieved in 136 individuals (53%; 95% CI, 46.8–59.4; P<0.0001). The median DOR was not reached at a median follow-up of 12 months (95% CI, 11.2 to 16.7). The median PFS was 6.8 months (95% CI, 3.3 to 14.1) after a median follow up of 12.3 months. Median OS was 21.1 months (95% CI, 13.3 to not estimable) after a median follow-up of 17.5 months (95% CI, 12.9–17.8). CRS occurred in 113 individuals (42%) with grade 3 or higher occurring in six individuals (2%). Nine individuals (6%) experienced a dose-limiting toxicity including one individual who died from diffuse alveolar damage after receiving a dose of 50 × 106 CAR T cells. Seven individuals (3%) of the total individuals who were infused died from treatment-emergent events.
On June 24, 2022, the FDA approved lisocabtagene maraleucel (Breyanzi) for the treatment of adult individuals with refractory large B-cell lymphoma to first-line chemoimmunotherapy or relapse within 12 months of first-line chemoimmunotherapy who were eligible for autologous HSCT. This approval was based on a randomized, parallel-group, open-label, multicenter phase 3 trial (TRANSFORM; NCT03575351). A total of 184 individuals were divided 1:1 into two cohorts. One cohort received a SOC regimen, and the other cohort received lisocabtagene maraleucel (Breyanzi). The primary endpoint was EFS. Secondary endpoints were CRR, PFS, OS, ORR, DOR, and adverse events. At the interim data analysis, the median EFS for the lisocabtagene maraleucel (Breyanzi) cohort was 10.1 months (95% CI, 6.1 to not reached) compared to 2.3 months (95% CI, 2.2–4.3) for the SOC cohort; P<0.0001. The CRR for the lisocabtagene maraleucel (Breyanzi) cohort was 66% (95% CI, 56–76) versus 39% (95% CI, 29–50) for the SOC cohort. The ORR in the lisocabtagene maraleucel (Breyanzi) cohort was 85% (95% CI, 77–92) versus 48% (95% CI, 37–59) in the SOC cohort. The most common grade 3 or worse adverse event was neutropenia in 80% of the lisocabtagene maraleucel (Breyanzi) cohort and 51% of the SOC cohort. Grade 3 CRS occurred in 1%, and neurological events occurred in 4% of individuals treated with lisocabtagene maraleucel (Breyanzi). There were no treatment-related deaths in the lisocabtagene maraleucel (Breyanzi) cohort and one treatment-related death in the SOC cohort.
The safety and efficacy of lisocabtagene maraleucel (Breyanzi) in adult individuals with R/R large B-cell lymphoma after first-line treatment and who were ineligible for HSCT (based on age, performance status, and/or comorbidities) were studied in TRANSCEND-PILOT (NCT03483103). This was a single-arm, open-label, multicenter phase 2 study that enrolled 61 participants. The primary endpoint was ORR. The secondary endpoints were CRR, DOR, PFS, EFS, OS, and adverse events. The ORR was 80% (95% CI, 68–89); P<0.0001). At a median follow-up of 13.0 months, the median PFS was 9.03 months (95% CI, 4.17 to not reached). At a median follow up of 15.5 months, the median DOR was 12.09 months (95% CI, 6.24 to not reached). In the intention-to-treat population, the CRR was 46% (95% CI, 34–58). In this same group, the median EFS was 8.15 months (95% CI, 4.37–13.34). Median OS was not reached. CRS occurred in 38% (one grade 3) of participants and neurological events occurred in 31% (three grade 3) of individuals. There were no grade 4 events and no deaths.
The safety and efficacy of lisocabtagene maraleucel (Breyanzi) in adult individuals with R/R CLL or SLL after two or more lines of therapy for individuals with high-risk features, or after three or more lines of therapy for individuals with standard-risk features was studied in a phase 1/2 open-label study (TRANSCEND CLL 004; NCT03331198). The individuals were required to have received a Bruton tyrosine kinase (BTK) inhibitor and a BCL2 inhibitor as part of their prior therapy. The phase 1 portion of the study was the dose-finding portion of the study that determined the dose of lisocabtagene maraleucel (Breyanzi) that would be used in the phase 2 portion of the study. The primary endpoint of the phase 2 portion of the study was the ORR or remission at 24 months. Key secondary endpoints were DOR, PFS, and OS. Of the 113 individuals who underwent leukapheresis, 94 received lisocabtagene maraleucel (Breyanzi). The ORR was 45%. The median DOR was 35.3 months. The median PFS was 11.9 months. The median OS was 30.3 months. In individuals who received lisocabtagene maraleucel (Breyanzi), 9% experienced grade 3 CRS; none experienced grade 4 or 5. One death from macrophage activation syndrome–hemophagocytic lymphohistiocytosis (MAS/HLH) was believed to be related to treatment. There was a higher incidence of CRS and neurological events in treated individuals, which is consistent with other studies in individuals with CLL.
The safety and efficacy of lisocabtagene maraleucel (Breyanzi) in adult individuals with R/R FL after two or more lines of therapy were studied in a phase 2 open label study (TRANSCEND FL; NCT04245839). The individuals were required to have received an anti-CD20 and alkylating agent as part of their prior therapy. The primary endpoint was ORR. Key secondary endpoints included the percentage of CRs and DOR. Of the 114 individuals who underwent leukapheresis, 107 received lisocabtagene maraleucel (Breyanzi). The ORR was 95.7%. The CR rate was 73.4%. At a median of 18 months, the DOR has not been reached. CRS occurred in 58% of treated individuals, but only 1% was grade 3 with none being grade 4 or 5. Two deaths were believed to be treatment related. One was from MAS/HLH, and the other was due to progressive multifocal leukoencephalopathy after the 90-day treatment-emergent period.
The safety and efficacy of lisocabtagene maraleucel (Breyanzi) in adult individuals with R/R MCL after two or more lines of therapy was studied in a phase 1 open label study (TRANSCEND-NHL 001, MCL cohort; NCT NCT02631044). The individuals were required to have received an alkylating agent, a BTK inhibitor, and either rituximab or other CD20-targeted agent as part of their prior therapy. A key primary endpoint included ORR at 24 months. Key secondary endpoints included percentage of CRs and DOR. Of the 89 individuals who underwent leukapheresis, 71 received lisocabtagene maraleucel (Breyanzi). The ORR was 85.3%. The CR rate was 67.6%. The median DOR was 13.3 months. CRS was reported in 61% of treated individuals with 1% being grade 4, and none being grade 3 or 5. Only one death was considered to be treatment related.
The trial evaluating lisocabtagene maraleucel (Breyanzi) in R/R marginal zone lymphoma (MZL) was the TRANSCEND FL‑MZL Cohort, registered as NCT04245839. This was an open-label, multicenter, single-arm Phase II study in adults with MZL who had relapsed after two or more lines of systemic therapy or after a hematopoietic stem cell transplant. Participants underwent leukapheresis to collect T cells, received lymphodepleting chemotherapy (fludarabine + cyclophosphamide), then a single infusion of lisocabtagene maraleucel (Breyanzi) 2 to 7 days later. Of the 77 leukapheresed individuals, 66 received the planned infusion. The ORR was 95.5%, with 62.1% achieving a CR on imaging. Responses were durable, with median follow-up of 21.6 months, and DOR was not reached.
TISAGENLECLEUCEL (KYMRIAH)
On August 30, 2017, the FDA approved tisagenlecleucel (Kymriah) for the treatment of individuals up to 25 years old with B-cell precursor ALL that is refractory or in second- or later stage relapse. Tisagenlecleucel (Kymriah) is a CD19-directed genetically modified autologous T-cell immunotherapy.The efficacy and safety of tisagenlecleucel (Kymriah) in pediatric and young adult individuals with R/R B-cell ALL were evaluated in a single-arm, open-label, multicenter, phase 2 study (ELIANA; NCT02435849). Enrolled individuals had to have received at least one prior line of therapy. The primary outcome of this trial is the ORR within 3 months of infusion of tisagenlecleucel (Kymriah). Secondary outcomes included DOR, EFS, OS, and safety. Of 92 individuals who were enrolled, 75 received an infusion. Of the 75 individuals infused with tisagenlecleucel (Kymriah) and who had at least 3 months of follow-up, the ORR was 81% (95% CI, 71–89) with 45 individuals (60%) achieving CR and 16 individuals (21%) having CR with incomplete hematologic recovery and all of them were minimal residual disease (MRD) negative. DOR was defined as the time since onset of CR to relapse or death due to underlying cancer, whichever is earlier. A median duration of remission DOR was not reached by any of the 61 individuals who achieved a CR or CR with incomplete hematologic recovery. The rate of relapse-free survival was 80% (95% CI, 65–89) at 6 months and 59% (95% CI, 41–73) at 12 months. The rate of EFS at 6 months was 73% (95% CI, 60–82) and at 12 months was 50% (95% CI, 35–64) with median EFS not being achieved. The rate of OS for all 75 individuals who received an infusion was 90% (95% CI, 81–95) at 6 months and 76% (95% CI, 63–86) at 12 months. Of the 75 individuals who received an infusion, 71 (95%) experienced an adverse event that was believed to be related to the infusion. CRS occurred in 77% of the individuals who received an infusion, and neurologic events occurred in 40%. Nineteen individuals died after receiving an infusion, but only three of the deaths were believed to be caused by the infusion.On May 1, 2018, the FDA approved tisagenlecleucel (Kymriah) for the treatment of adults with R/R DLBCL after at least two prior lines of therapy. The efficacy and safety of tisagenlecleucel (Kymriah) were evaluated in an open-label, single-arm multicenter, Phase 2 trial (JULIET; NCT02445248). The study included adults with R/R DLBCL who had received two or more lines of chemotherapy, including rituximab and anthracycline, or were ineligible for autologous HSCT or had relapsed following autologous HSCT. The primary endpoint was ORR. Key secondary endpoints included DOR, OS, and safety data. A total of 165 individuals were enrolled and 111 received an infusion. Of the 93 individuals in the efficacy analysis set (individuals who had received an infusion and who were able to be followed for at least 3 months after), the ORR was 52% (95% CI, 41–62) with 40% obtaining a CR and 12% a PR. The median DOR was not reached (95% CI, 10 months to not estimable). The estimated rate of PFS at 12 months was 83%. The median OS among individuals who had received an infusion was 12 months (95% CI, 7 months to not reached). The percentage of individuals who received an infusion who experienced grade 3 or higher CRS was 22%. The percentage of these individuals who experienced a neurologic event of grade 3 or higher was 12%. Although three individuals died after receiving an infusion, none of these were due to the infusion but were from disease progression. On May 27, 2022, the FDA approved tisagenlecleucel (Kymriah) for the treatment of adults with R/R FL after two or more lines of systemic therapy. This indication was approved under accelerated approval and continued approval may be contingent upon verification and description of clinical benefit in confirmatory trials. The efficacy and safety of tisagenlecleucel (Kymriah) were evaluated in an open-label, single-arm multicenter, Phase 2 trial (ELARA; NCT03568461). The study included 98 adults with R/R FL grades 1 to 2 who had previously received two or more lines of treatment or had relapsed after autologous HSCT. Individuals were not eligible for the study if they had previously undergone allogeneic HSCT or had active CNS malignancy. The primary endpoint was CRR. Key secondary endpoints included ORR, DOR, PFS, OS, and safety. Based on interim data, the CRR was 69.1% (95% CI, 58.8–78.3). The ORR was 86.2% (95% CI, 77.5–92.4). The data for the other secondary endpoints has not matured yet. At the time of the publication of the data, the rate of CRS was 48.5% (with none grade 3 or higher) and the rate of neurological events was 37.1% (3% were grade 3 or higher). There have not been any treatment-related deaths.
Aucatzyl (obecabtagene autoleucel)
The Phase 1b/2 FELIX trial (NCT04404660) was an open‑label, multicenter, single‑arm study evaluating Aucatzyl (obecabtagene autoleucel) in adults with relapsed or refractory B‑cell acute lymphoblastic leukemia (ALL). Participants received a lymphodepleting chemotherapy regimen, followed by a bone marrow burden–adjusted split dose totaling 410 × 10⁶ CD19-positive CAR T cells on Day 1 and Day 10 (±2 days). Among the 94 efficacy-evaluable participants in the pivotal cohort, 55% achieved CR, and the overall remission rate (CR or CR with incomplete hematologic recovery) was 77%. The median duration of response was 14.1 months.
OFF-LABEL INDICATIONS
There may be additional indications contained in the Policy section of this document due to evaluation of criteria highlighted in the Company’s off-label policy, and/or review of clinical guidelines issued by leading professional organizations and government entities.