Trial Outcomes & Findings for Efficacy and Safety of Tisagenlecleucel in Adult Patients With Refractory or Relapsed Follicular Lymphoma (NCT NCT03568461)

90 participants were planned, 98 patients were enrolled and 97 participants were infused with tisagenlecleucel.

During the Screening phase and prior to enrolment into the study, participants' white blood cells were collected via leukapheresis.

Efficacy and Safety of Tisagenlecleucel in Adult Patients With Refractory or Relapsed Follicular Lymphoma

Complete response rate was defined as the percentage of participants with a best overall response (BOR) of complete response (CR) recorded from tisagenlecleucel infusion until progressive disease or start of new anticancer therapy, whichever came first. CRR was determined by an independent review committee (IRC) and was based on Lugano 2014 classification response criteria. The radiological response is first obtained from CT and PET studies according to the Lugano 2014 criteria. CT response is based on anatomical measurements of index/non-index/new lesions and spleen length. The possible response outcomes are complete response (CR), partial response (PR), stable disease (SD), or progressive disease (PD). PET response based on a 5-point scale (5PS) or Deauville score. The possible outcomes for PET response are complete metabolic response (CMR), partial metabolic response (PMR), no metabolic response (NMR), or progressive metabolic disease (PMD).

Overall response rate is defined as the percentage of participants with a best overall disease response of complete response (CR) or partial response (PR). Response was evaluated per Lugano 2014 classification response criteria. The radiological response is first obtained from CT and PET studies according to the Lugano 2014 criteria. CT response is based on anatomical measurements of index/non-index/new lesions and spleen length. The possible response outcomes are complete response (CR), partial response (PR), stable disease (SD), or progressive disease (PD). PET response based on a 5-point scale (5PS) or Deauville score. The possible outcomes for PET response are complete metabolic response (CMR), partial metabolic response (PMR), no metabolic response (NMR), or progressive metabolic disease (PMD).

Duration of response (DOR) applied only to participants whose best overall disease response was CR or PR. It is defined as the time from the date of first documented disease response (CR or PR) to the date of first documented progression or death due to follicular lymphoma (FL). DOR was estimated using the Kaplan-Meier method.

Duration of response (DOR) applied only to participants whose best overall disease response was complete response (CR) only. It is defined as the time from the date of first documented disease response (CR only) to the date of first documented progression or death due to follicular lymphoma (FL). DOR was estimated using the Kaplan-Meier method.

Progression free survival is the time from tisagenlecleucel infusion to first documented disease progression or death due to any cause. PFS was estimated using the Kaplan-Meier method.

Overall Survival is the time from tisagenlecleucel infusion to death due to any cause. OS was estimated using the Kaplan-Meier method.

This is the summary of cellular kinetic concentrations for tisagenlecleucel (CTL019) transgene levels in peripheral blood and bone marrow following infusion.

Cmax is the maximum (peak) observed in peripheral blood after single dose administration. Actual sampling times were taken into consideration for the calculation of cellular kinetic parameters parameters.

Tmax is the time to reach maximum (peak) peripheral blood after single dose administration (days). Actual sampling times were taken into consideration for the calculation of cellular kinetic parameters.

AUC0-28 is the area under curve (AUC) from time zero to day 28 in peripheral blood. AUC0-84d is the AUC from time zero to day 84 in peripheral blood. Actual sampling times were taken into consideration for the calculation of cellular kinetic parameters.

Exposure is summarized as area under the curve (AUC) from time 0 to 28 days (AUC0-28d) and from time to 84 days (AUC0-84d). The cellular kinetic parameters were estimated from the percentages of CD3+/CTL019+ cells obtained from flow cytometry. Flow cytometry measures the surface expression of chimeric antigen receptors (CARs) on T cells.

Cmax is the maximum (peak) observed in peripheral blood after single dose administration. Actual sampling times were taken into consideration for the calculation of cellular kinetic parameters parameters.

In vivo cellular kinetics of CD3+/CTL019+ levels tisagenlecleucel cells detected by flow cytometry base on best overall response (BOR). The cellular kinetic parameters were estimated from the percentages of CD3+/CTL019+ cells obtained from flow cytometry. Flow cytometry measures the surface expression of chimeric antigen receptors (CARs) on T cells.

Antibody titers specific to the tisagenlecleucel molecule prior to and following infusion. Percentage of participants who tested positive for anti-mCAR19 antibodies at any time post-baseline. A participant was only defined as positive for tisagenlecleucel treatment-induced or -boosted anti-mCAR19 antibodies when the anti-mCAR19 antibody median fluorescence intensity (MFI) at any time post-infusion was at least 2.28-fold higher than pre-infusion levels for patients whose baseline status was positive (boosted) or if the baseline status was negative, but any post-baseline interpretation was positive (induced).

Activation of T-cells in peripheral blood mononuclear cells collected from participants in response to mCAR19-derived peptides was used to assess the cellular immunogenicity against tisagenlecleucel. T-cell activation was measured by the percentage of interferon gamma (IFNg+) cells by flow cytometry. Cellular responses to mCART peptides were measured pre-infusion (enrollment) and post-tisagenlecleucel infusion. Pool 1 and Pool 2 are a pool of 60 peptides (peptides 1-60) and 59 peptides (peptides 61-119) , respectively, corresponding to the CTL019 transgene product. Together, they comprised 119 peptides spanning the CTL019 transgene product and were used to stimulate PBMCs to detect antigen-specific T cell responses via intracellular cytokine staining.

Effect of tisagenlecleucel therapy on patient reported outcomes were reported using the Short Form Health Survey (SF-36) v2 form. The SF-36 v2 is a widely used and extensively studied instrument to measure health-related quality of life among healthy patients and patients with acute and chronic conditions. It consists of eight subscales that can be scored individually: Physical Functioning, Role-Physical, Bodily Pain, General Health, Vitality, Social Functioning, Role-Emotional, and Mental Health. Two overall summary scores, the Physical Component Summary (PCS) and the Mental Component Summary (MCS) were computed by summing the item responses on the questions for each domain in accordance with the respective scoring method provided by the developers. Each item is scored on a 0 to 100 range so that the lowest and highest possible scores are 0 and 100, respectively. A high score defines a more favorable health state.

Effect of tisagenlecleucel therapy on patient reported outcomes were reported using the Short Form Health Survey (SF-36) v2 form. The SF-36 v2 is a widely used and extensively studied instrument to measure health-related quality of life among healthy patients and patients with acute and chronic conditions. It consists of eight subscales that can be scored individually: Physical Functioning, Role-Physical, Bodily Pain, General Health, Vitality, Social Functioning, Role-Emotional, and Mental Health. Two overall summary scores, the Physical Component Summary (PCS) and the Mental Component Summary (MCS) were computed by summing the item responses on the questions for each domain in accordance with the respective scoring method provided by the developers. Each item is scored on a 0 to 100 range so that the lowest and highest possible scores are 0 and 100, respectively. A high score defines a more favorable health state.

Effect of tisagenlecleucel therapy on patient-reported outcomes was assessed using the EuroQol 5-Dimension, 3-Level instrument (EQ-5D-3L). The EQ-5D-3L is a widely used, self-administered questionnaire designed to evaluate health status in adults. It consists of two sections. The first includes one item for each of the five dimensions (mobility, self-care, usual activities, pain/discomfort, and anxiety/depression). Patients rate each dimension as "no problems" (level 1), "some problems" (level 2), or "extreme problems" (level 3). This record summarizes, for each of the five dimensions, the number of patients falling into each response level.

Effect of tisagenlecleucel therapy on patient reported outcomes were reported using the EQ-VAS (EuroQol Visual Analogue Scale). The EQ-VAS is a 20 cm vertical, 0-100 numerical scale used alongside the EQ-5D questionnaire to measure a patient's self-rated health. It anchors "best imaginable health" (100) at the top and "worst imaginable health" (0) at the bottom, providing a quick, subjective, quantitative, and global assessment of health status on the day of survey. The second section of the questionnaire measures self-rated (global) health status utilizing a vertically oriented visual analogue scale where 100 represents the "best possible health state" and 0 represents the "worst possible health state."

Effect of tisagenlecleucel therapy on patient reported outcomes were reported using the EQ-VAS (EuroQol Visual Analogue Scale). The EQ-VAS is a 20 cm vertical, 0-100 numerical scale used alongside the EQ-5D questionnaire to measure a patient's self-rated health. It anchors "best imaginable health" (100) at the top and "worst imaginable health" (0) at the bottom, providing a quick, subjective, quantitative, and global assessment of health status on the day of survey

The effect of tisagenlecleucel therapy on patient-reported outcomes was assessed using the Functional Assessment of Cancer Therapy-Lymphoma (FACT-Lym) questionnaire, which measures quality of life in participants with lymphoma. FACT-Lym is composed of the FACT-G (27 items across Physical, Social/Family, Emotional, and Functional Well-Being, plus Additional Concerns) and a 15-item lymphoma-specific subscale. All items use a five-point self-administered response scale (0-4), with higher scores indicating better quality of life. The possible score ranges are as follows: - Physical Well-Being (PWB): 0-28 - Social/Family Well-Being (SWB): 0-28 - Emotional Well-Being (EWB): 0-24 - Functional Well-Being (FWB): 0-28 - Lym Subscale (15 items): 0-60 - Lymphoma Trial Outcome Index (TOI: PWB + FWB + Lym): 0-116 - FACT-G Total (PWB + SWB + EWB + FWB): 0-108 - FACT-Lym Total (FACT-G + Lym): 0-168 In all cases, higher scores indicate better outcomes within the corresponding domain.

The effect of tisagenlecleucel therapy on patient-reported outcomes was assessed using the Functional Assessment of Cancer Therapy-Lymphoma (FACT-Lym) questionnaire, which measures quality of life in participants with lymphoma. FACT-Lym is composed of the FACT-G (27 items across Physical, Social/Family, Emotional, and Functional Well-Being, plus Additional Concerns) and a 15-item lymphoma-specific subscale. All items use a five-point self-administered response scale (0-4), with higher scores indicating better quality of life. The possible score ranges are as follows: - Physical Well-Being (PWB): 0-28 - Social/Family Well-Being (SWB): 0-28 - Emotional Well-Being (EWB): 0-24 - Functional Well-Being (FWB): 0-28 - Lym Subscale (15 items): 0-60 - Lymphoma Trial Outcome Index (TOI: PWB + FWB + Lym): 0-116 - FACT-G Total (PWB + SWB + EWB + FWB): 0-108 - FACT-Lym Total (FACT-G + Lym): 0-168 In all cases, higher scores indicate better outcomes within the corresponding domain.