The efficacy of lenalidomide with rituximab in patients with relapsed or refractory follicular and marginal zone lymphoma was evaluated in the AUGMENT (NCT01938001) and MAGNIFY (NCT01996865) trials.
AUGMENT is a randomized, double-blind, multicenter trial (n=358) in which patients with relapsed or refractory follicular or marginal zone lymphoma were randomized 1:1 to receive lenalidomide and rituximab or rituximab and placebo. AUGMENT included patients diagnosed with Grade 1, 2, or 3a follicular lymphoma, who received at least 1 prior systemic therapy, were refractory or relapsed, not rituximab-refractory, had at least one measurable nodal or extranodal lesion by CT or MRI scan, and had adequate bone marrow, liver, and renal function. Randomization was stratified by follicular versus marginal zone lymphoma, previous rituximab therapy, and time since other anti-lymphoma therapy. In AUGMENT, lenalidomide was administered orally 20 mg once daily for Days 1 to 21 of repeating 28-day cycles for a maximum of 12 cycles or until unacceptable toxicity. The dose of rituximab was 375 mg/m2 every week in Cycle 1 (Days 1, 8, 15, and 22) and on Day 1 of every 28-day cycle from Cycles 2 through 5. All dosage calculations for rituximab were based on the patient’s body surface area (BSA), using actual patient weight. Dose adjustments for lenalidomide were allowed based on clinical and laboratory findings. A patient with moderate renal insufficiency (≥30 to <60 mL/minute) received a lower lenalidomide starting dose of 10 mg daily on the same schedule. After 2 cycles, the lenalidomide dose could be increased to 15 mg once daily on Days 1 to 21 of each 28-day cycle if the patient tolerated the medication.
MAGNIFY is an open-label, multicenter trial (n=232) in which patients with relapsed or refractory follicular, marginal zone, or mantle cell lymphoma received 12 induction cycles of lenalidomide and rituximab. MAGNIFY included patients diagnosed with Grade 1, 2,3a, 3b follicular (including transformed), marginal zone, or mantle cell lymphoma Stage I to IV who were previously treated for their lymphoma, had been refractory or had a relapse after their last treatment, had at least one measurable nodal or extranodal lesion by CT or MRI scan, and had adequate bone marrow, liver, and renal function. Patients refractory to rituximab were also included. The information from the subjects who received at least 1 dose of initial therapy in the first 12 induction cycles (n=222) in the MAGNIFY trial was included in the evaluation of the efficacy of lenalidomide/rituximab in patients with relapsed or refractory follicular and marginal zone lymphoma. In MAGNIFY, lenalidomide 20 mg was given on Days 1-21 of repeated 28-day cycles for up to 12 cycles or until unacceptable toxicity, progression, or withdrawal of consent. The dose of rituximab was 375 mg/m2 every week in Cycle 1 (Days 1, 8, 15, and 22) and on Day 1 of every other 28-day cycle (Cycles 3,5,7,9, and 11) up to 12 cycles therapy. All dosage calculations for rituximab were based on the patient BSA and actual weight. Dose adjustments were allowed based on clinical and laboratory findings.
The demographic and disease-related baseline characteristics in the AUGMENT and MAGNIFY trials are shown in the following table.
Table 21: Baseline Demographics and Disease-Related Characteristics of Patients with FL and MZL in AUGMENT and MAGNIFY Trials
Parameter | AUGMENT Trial | MAGNIFY Trial |
Lenalidomide + Rituximab (N=178) | Rituximab + Placebo (Control Arm) (N=180) | Lenalidomide + Rituximab (N=222) |
Age (years) | | | |
Median (Max, Min) | 64 (26, 86) | 62 (35, 88) | 65 (35, 91) |
Age distribution, n (%) | | | |
<65 years | 96 (54) | 107 (59) | 103 (46) |
≥65 years | 82 (46) | 73 (41) | 119 (54) |
Sex, n (%) | | | |
Male | 75 (42) | 97 (54) | 122 (55) |
Female | 103 (58) | 83 (46) | 100 (45) |
Race | | | |
White | 118 (66) | 115 (64) | 206 (93) |
Other races | 54 (30) | 64 (36) | 14 (6) |
Not collected or reported | 6 (3) | 1 (0.6) | 2 (1) |
Body Surface Area (BSA, m2) | | | |
Median (Max, Min) | 1.8 (1.4, 3.1) | 1.8 (1.3, 2.7) | 2 (1.3, 2.6) |
Disease Type FL or MZL | | | |
Follicular lymphoma | 147 (83) | 148 (82) | 177 (80) |
Marginal zone lymphoma | 31 (17) | 32 (18) | 45 (20) |
MZL subtype at diagnosis (investigator), n (%) | | | |
MALT | 14 (45) | 16 (50) | 10 (22) |
Nodal | 8 (26) | 10 (31) | 25 (56) |
Splenic | 9 (29) | 6 (19) | 10 (22) |
FL stage at diagnosis (investigator), n (%) | | | |
FL Grade 1-2 | 125 (85) | 123 (83) | 149 (84) |
FL Grade 3a | 22 (15) | 25 (17) | 28 (16) |
FLIPI score at baseline (calculated), n (%) | | | Not Collected |
Low risk (0,1) | 52 (29) | 67 (37) | |
Intermediate risk (2) | 55 (31) | 58 (32) |
High risk (≥3) | 69 (39) | 54 (30) |
Missing | 2 (1) | 1 (0.6) |
ECOG score at baseline, n (%) | | | |
0 | 116 (65) | 128 (71) | 102 (46) |
1 | 60 (34) | 50 (28) | 113 (51) |
2 | 2 (1) | 2 (1) | 7 (3) |
High tumor burdena at baseline, n (%) | | | |
Yes | 97 (54) | 86 (48) | 148 (67) |
No | 81 (46) | 94 (52) | 74 (33) |
Number of prior systemic antilymphoma therapies | | | |
1 | 102 (57) | 97 (54) | 94 (42)b |
>1 | 76 (43) | 83 (46) | 128 (58) |
Data Cutoff: 22 June 2018 (AUGMENT) and 1 May 2017 (MAGNIFY).
a Defined by GELF criteria.
b Patient had either 0 (n=2) or 1 prior systemic therapy.
ECOG = Eastern Cooperative Oncology Group; FLIPI = follicular lymphoma international prognostic index
In AUGMENT, efficacy was established in the intent-to-treat (ITT) population based on progression-free survival by Independent Review Committee using modified 2007 International Working Group response criteria. Efficacy results are summarized in Table 22.
Table 22: Efficacy Results for Patients in the AUGMENT Trial (ITT FL and MZL Population)
Parameter | Lenalidomide + Rituximab (N = 178) | Rituximab + Placebo (N = 180) |
PFS | | |
Patients with event, n (%) | 68 (38.2) | 115 (63.9) |
Death | 6 (8.8) | 2 (1.7) |
Progression of disease | 62 (91.2) | 113 (98.3) |
PFS, median a [95% CI] (months) | 39.4 [ 22.9, NE] | 14.1 [11.4, 16.7] |
HR b[95% CI] | 0.46 [ 0.34, 0.62] |
p-value c | <0.0001 |
Objective response (CR+PR), n(%) [95% CI]d | 138 (77.5) [70.7, 83.4] | 96 (53.3) [45.8, 60.8] |
a Median estimate is from Kaplan-Meier analysis.
b hazard ratio and its CI were estimated from Cox proportional hazard model adjusting for the stratification 3: previous rituximab treatment (yes, no), time since last antilymphoma therapy (≤ 2, > 2 years), and disease histology (FL, MZL).
c p-value from log-rank test stratified by 3 factors noted above: previous rituximab treatment (yes, no), time since last antilymphoma therapy (≤ 2, > 2 years), and disease histology (FL, MZL).
d Exact confidence interval for binomial distribution.
Kaplan-Meier Curves of Progression-free Survival by IRC Assessment Between Arms in AUGMENT Trial (ITT FL and MZL Population)
a = Stratification factors included: previous rituximab treatment (y/n), time since last anti-lymphoma therapy (≤2 years, >2years), and disease histology (FL or MZL).
CI = confidence interval; HR = hazard ratio; KM = Kaplan-Meier; PFS = progression-free survival
Follicular Lymphoma
In AUGMENT, the objective response by IRC assessment for patients with follicular lymphoma was 80% (118/147) [95% CI: 73%, 86%]) in lenalidomide with rituximab arm compared to 55% (82/148) [95% CI: 47, 64] in control arm.
In MAGNIFY, the overall response by investigator assessment was 59% (104/177) [95% CI: 51, 66] for patients with follicular lymphoma. Median duration of response was not reached with a median follow-up time of 7.9 months [95% CI: 4.6, 9.2].
Marginal Zone Lymphoma
In AUGMENT, the objective response by IRC assessment for patients with marginal zone lymphoma was 65% (20/31) [95% CI: 45%, 81%] in lenalidomide with rituximab arm compared to 44% (14/32) [95% CI: 26%, 62%] in control arm.
In MAGNIFY, the overall response by investigator assessment was 51% (23/45) [95% CI: 36, 66] for patients with marginal zone lymphoma. Median duration of response was not reached with a median follow-up time of 11.5 months [95% CI: 8.0, 18.9].