Study Evaluating the Safety and Efficacy of KTE-C19 in Adult Participants With Refractory Aggressive Non-Hodgkin Lymphoma

DLT was defined as axicabtagene ciloleucel-related events with onset within first 30 days following infusion:

• Grade (GR) 4 neutropenia lasting > 21 days and GR 4 thrombocytopenia lasting > 35 days from day of cell transfer;
• Any axicabtagene ciloleucel-related AE requiring intubation;
• All other GR 3 toxicities lasting > 3 days and all GR 4 toxicities, with exception of following conditions which were not considered DLTs: aphasia/dysphasia or confusion/cognitive disturbance which resolved to GR ≤ 1 within 2 weeks and to baseline within 4 weeks; fever GR 3; myelosuppression defined as lymphopenia, decreased hemoglobin, neutropenia and thrombocytopenia unless neutropenia and thrombocytopenia met DLT definition described above; immediate hypersensitivity reactions occurring within 2 hours of cell infusion that were reversible to a ≤ GR 2 within 24 hours of cell administration with standard therapy; hypogammaglobulinemia GR 3 or 4.

ORR was defined as the percentage of participants achieving either a complete response (CR) or a partial response (PR), as assessed by the study investigators using revised IWG Response Criteria for Malignant Lymphoma (Cheson et al, 2007). CR: complete disappearance of all detectable clinical evidence of disease and disease-related symptoms; all lymph nodes and nodal masses must have regressed to normal size; spleen and/or liver must be normal size, not be palpable, and no nodules; bone marrow aspirate and biopsy must show no evidence of disease. PR: a ≥ 50% decrease in sum of the product of the diameters (SPD) of up to 6 of the largest dominant nodes or nodal masses; no increase in size of nodes, liver or spleen and no new sites of disease; multiple splenic and hepatic nodules (if present) must regress by ≥ 50% in the SPD; > 50% decrease in the greatest transverse diameter for single nodules. 95% confidence interval (CI) was calculated by Clopper-Pearson method.

TEAE was defined as any AE with onset on or after the start of treatment. CRS events were graded by Lee et al 2014. Grade 1 : No life threatening symptoms and require symptomatic treatment only; Grade 2: Symptoms require and respond to moderate intervention; Grade 3: Symptoms require and respond to aggressive intervention; Grade 4: Life-threatening symptoms and requirements for ventilator support or continuous venovenous hemodialysis (CVVHD), and Grade 5: Death. Neurologic toxicities were graded by Common Terminology Criteria for Adverse Events (CTCAE) version 4.03. Grade 1: Mild, asymptomatic or mild symptoms and intervention not indicated; Grade 2: Moderate and minimal, local or noninvasive intervention indicated; Grade 3: Severe or medically significant but not immediately life-threatening, hospitalization or prolongation of hospitalization indicated; Grade 4: Life-threatening and urgent intervention indicated; Grade 5: Death related to AE.

TEAE was defined as any AE with onset on or after the start of treatment. CRS events were graded by Lee et al 2014. Grade 1 : No life threatening symptoms and require symptomatic treatment only; Grade 2: Symptoms require and respond to moderate intervention; Grade 3: Symptoms require and respond to aggressive intervention; Grade 4: Life-threatening symptoms and requirements for ventilator support or CVVHD, and Grade 5: Death. Neurologic toxicities were graded by CTCAE version 4.03. Grade 1: Mild, asymptomatic or mild symptoms and intervention not indicated; Grade 2: Moderate and minimal, local or noninvasive intervention indicated; Grade 3: Severe or medically significant but not immediately life-threatening, hospitalization or prolongation of hospitalization indicated; Grade 4: Life-threatening and urgent intervention indicated; Grade 5: Death related to AE.

TEAE was defined as any AE with onset on or after the start of treatment. CRS events were graded by Lee et al 2014. Grade 1 : No life threatening symptoms and require symptomatic treatment only; Grade 2: Symptoms require and respond to moderate intervention; Grade 3: Symptoms require and respond to aggressive intervention; Grade 4: Life-threatening symptoms and requirements for ventilator support or CVVHD, and Grade 5: Death. Neurologic toxicities were graded by CTCAE version 4.03. Grade 1: Mild, asymptomatic or mild symptoms and intervention not indicated; Grade 2: Moderate and minimal, local or noninvasive intervention indicated; Grade 3: Severe or medically significant but not immediately life-threatening, hospitalization or prolongation of hospitalization indicated; Grade 4: Life-threatening and urgent intervention indicated; Grade 5: Death related to AE.

TEAE was defined as any AE with onset on or after the start of treatment. CRS events were graded by Lee et al 2014. Grade 1 : No life threatening symptoms and require symptomatic treatment only; Grade 2: Symptoms require and respond to moderate intervention; Grade 3: Symptoms require and respond to aggressive intervention; Grade 4: Life-threatening symptoms and requirements for ventilator support or CVVHD, and Grade 5: Death. Neurologic toxicities were graded by CTCAE version 4.03. Grade 1: Mild, asymptomatic or mild symptoms and intervention not indicated; Grade 2: Moderate and minimal, local or noninvasive intervention indicated; Grade 3: Severe or medically significant but not immediately life-threatening, hospitalization or prolongation of hospitalization indicated; Grade 4: Life-threatening and urgent intervention indicated; Grade 5: Death related to AE.

Among participants who experience an objective response (OR), DOR was defined as the date of their first objective response (CR or PR which was subsequently confirmed) to disease progression per the revised IWG Response Criteria for Malignant Lymphoma or death regardless of cause. CR and PR as defined in outcome measure 2. Disease progression (PD) was defined by at least one of the following: ≥ 50% increase from nadir in the sum of the products of at least 2 lymph nodes, or at least a 50% increase in the product of the diameters of a single lymph node; appearance of a new lesion > 1.5 cm in any axis; ≥ 50% increase in size of splenic or hepatic nodules; ≥ 50% increase in the longest diameter of any single previously identified node > 1 cm in its short axis. Kaplan-Meier (KM) estimates was used for analyses.

ORR was defined as the percentage of participants achieving either a CR or a PR, as assessed by the study investigators using revised IWG Response Criteria for Malignant Lymphoma (Cheson et al, 2007). CR: complete disappearance of all detectable clinical evidence of disease and disease-related symptoms; all lymph nodes and nodal masses must have regressed to normal size; spleen and/or liver must be normal size, not be palpable, and no nodules; bone marrow aspirate and biopsy must show no evidence of disease. PR: a ≥ 50% decrease in SPD of up to 6 of the largest dominant nodes or nodal masses; no increase in size of nodes, liver or spleen and no new sites of disease; multiple splenic and hepatic nodules (if present) must regress by ≥ 50% in the SPD; > 50% decrease in the greatest transverse diameter for single nodules.

ORR was defined as the percentage of participants achieving either a CR or a PR, as assessed by the IRRC using revised IWG Response Criteria for Malignant Lymphoma. CR: complete disappearance of all detectable clinical evidence of disease and disease-related symptoms; all lymph nodes and nodal masses must have regressed to normal size; spleen and/or liver must be normal size, not be palpable, and no nodules; bone marrow aspirate and biopsy must show no evidence of disease. PR: a ≥ 50% decrease in SPD of up to 6 of the largest dominant nodes or nodal masses; no increase in size of nodes, liver or spleen and no new sites of disease; multiple splenic and hepatic nodules (if present) must regress by ≥ 50% in the SPD; > 50% decrease in the greatest transverse diameter for single nodules. 95% CI was calculated by Clopper-Pearson method.

ORR was defined as the percentage of participants achieving either a CR or a PR, as assessed by the study investigators using revised IWG Response Criteria for Malignant Lymphoma (Cheson et al, 2007). CR: complete disappearance of all detectable clinical evidence of disease and disease-related symptoms; all lymph nodes and nodal masses must have regressed to normal size; spleen and/or liver must be normal size, not be palpable, and no nodules; bone marrow aspirate and biopsy must show no evidence of disease. PR: a ≥ 50% decrease in SPD of up to 6 of the largest dominant nodes or nodal masses; no increase in size of nodes, liver or spleen and no new sites of disease; multiple splenic and hepatic nodules (if present) must regress by ≥ 50% in the SPD; > 50% decrease in the greatest transverse diameter for single nodules. 95% CI was calculated by Clopper-Pearson method.

PFS was defined as the time from the axicabtagene ciloleucel infusion date to the date of disease progression per the revised IWG Response Criteria for Malignant Lymphoma (Cheson et al, 2007) or death from any cause. Participants not meeting the criteria for progression by the analysis data cutoff date were censored at their last evaluable disease assessment date. Disease progression was defined by at least one of the following: ≥ 50% increase from nadir in the sum of the products of at least 2 lymph nodes, or at least a 50% increase in the product of the diameters of a single lymph node; appearance of a new lesion > 1.5 cm in any axis; ≥ 50% increase in size of splenic or hepatic nodules; ≥ 50% increase in the longest diameter of any single previously identified node > 1 cm in its short axis. KM estimates was used for analyses.

OS was defined as the time from axicabtagene ciloleucel infusion to the date of death. Participants who did not die by the analysis data cutoff date were censored at their last contact date. KM estimates was used for analyses.

Among participants who experience an objective response, DOR was defined as the date of their first objective response (CR or PR which was subsequently confirmed) to PD, as assessed by the IRRC using revised IWG Response Criteria for Malignant Lymphoma (Cheson et al, 2007) or death regardless of cause. CR and PR as defined in outcome measure 2. PD was defined by at least one of the following: ≥ 50% increase from nadir in the sum of the products of at least 2 lymph nodes, or at least a 50% increase in the product of the diameters of a single lymph node; appearance of a new lesion > 1.5 cm in any axis; ≥ 50% increase in size of splenic or hepatic nodules; ≥ 50% increase in the longest diameter of any single previously identified node > 1 cm in its short axis. Kaplan-Meier (KM) estimates was used for analyses.

The best overall response for each participant was based on the assessments of response (CR, PR, stable disease [SD], PD, and not done [ND]) made by the the IRRC using IWG 2007 criteria (Cheson et al, 2007). CR and PR as defined in outcome measure 2. PD defined by at least one of the following: ≥ 50% increase from nadir in the sum of the products of at least 2 lymph nodes, or at least a 50% increase in the product of the diameters of a single lymph node; appearance of a new lesion > 1.5 cm in any axis; ≥ 50% increase in size of splenic or hepatic nodules; ≥ 50% increase in the longest diameter of any single previously identified node > 1 cm in its short axis. SD: Neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for PD. Percentage of participants with best overall response of CR, PR, SD, PD, and ND was reported.

PFS was defined as the time from the axicabtagene ciloleucel infusion date to the date of disease progression as assessed by the IRRC using revised IWG Response Criteria for Malignant Lymphoma (Cheson et al, 2007) or death from any cause. Participants not meeting the criteria for progression by the analysis data cutoff date were censored at their last evaluable disease assessment date. PD defined by at least one of the following: ≥ 50% increase from nadir in the sum of the products of at least 2 lymph nodes, or at least a 50% increase in the product of the diameters of a single lymph node; appearance of a new lesion > 1.5 cm in any axis; ≥ 50% increase in size of splenic or hepatic nodules; ≥ 50% increase in the longest diameter of any single previously identified node > 1 cm in its short axis. KM estimates was used for analyses.

An adverse event was defined as any untoward medical occurrence in a clinical trial participants. The event did not necessarily have a relationship with study treatment. Adverse events included worsening of a pre-existing medical condition. Worsening indicated that the pre-existing medical condition had increased in severity, frequency, and/or duration or had an association with a worse outcome. A pre-existing condition that had not worsened during the study or involved an intervention such as elective cosmetic surgery or a medical procedure while on study, was not considered an adverse event. TEAE was defined as any AE with onset on or after the start of treatment.

Grading categories were determined by Common Terminology Criteria for Adverse Events (CTCAE) version 4.03. Grade 1: mild, Grade 2: moderate, Grade 3: severe or medically significant, Grade 4: life-threatening.

Peak was defined as the maximum number of CAR T cells measured post-infusion.

Peak was defined as the maximum post-baseline level of the cytokine. Following key cytokines were measured: interferon-gamma induced protein 10 (IP-10), ferritin, granzyme B, intercellular adhesion molecule (ICAM-1), interferon-gamma (IFN-gamma), interleukin-1 receptor antagonist (IL-1RA), IL-2, interleukin-2 receptor alpha (IL-2 R alpha), IL-6, IL-7, IL-8, IL-10, IL-15, perforin, tumor necrosis factor alpha (TNF alpha), and vascular cell adhesion molecule- 1 (VCAM-1).

Peak was defined as the maximum post-baseline level of the cytokine. Following key cytokines were measured: IP-10, granzyme B, IFN-gamma, IL-1 RA, IL-2, IL-6, IL-7, IL-8, IL-10, IL-15, TNF alpha, and granulocyte-macrophage colony-stimulating factor (GM-CSF).

Peak was defined as the maximum post-baseline level of the cytokine. Following key cytokines were measured: Ferritin, ICAM-1, IL-2 R, Perforin, and VCAM-1.

Peak was defined as the maximum post-baseline level of the cytokine.

Peak was defined as the maximum post-baseline level of the cytokine.

Peak was defined as the maximum post-baseline level of the cytokine.

RCR was analyzed in blood samples by central laboratory. Because axicabtagene ciloleucel comprised retroviral vector transduced T cells, the presence of RCR in the blood of treated participants was reported.

EQ-5D is a self-reported questionnaire used for assessing the overall health status of a participant scoring 5 dimensions of health: mobility, self-care, usual activities, pain/discomfort and anxiety/depression. Each dimension was divided into 5 levels of severity: "No problem", "Slight problems", "Moderate problems", "Severe problems", and "Extreme problems (unable to perform)". EQ-5D health states, defined by the EQ-5D descriptive system, are converted into a single summary index by applying a formula that attaches values (also called QOL weights or QOL utilities) to each of the levels in each dimension. EQ-5D Summary Index values range from -0.11 (worst health state) to 1.00 (perfect health state).

EQ-5D is a self-reported questionnaire used for assessing the overall health status of a participant. The EQ-5D-VAS records the participant's self-rated health on a vertical visual analogue scale and is asked to make a global assessment of their current state of health with 0 indicating the worst health they can imagine and 100 indicating the best health they can imagine.