Comparative double-blind randomized trial of 2 rituximab products in patients with CD20+ diffuse large B-cell lymphoma (DLBCL).
Bibliographic record
Abstract
7550 Background: DRL-Rituximab (T) is a proposed biosimilar of the innovator reference rituximab (USA: Rituxan; EU: MabThera). Physicochemical analyses and nonclinical studies have shown T to be comparable with innovator Rituximab. This study evaluated the pharmacokinetics (PK), pharmacodynamics (PD), efficacy, safety and immunogenicity of T with EU sourced MabThera (R) in DLBCL patients. Methods: Multicentre randomized double-blind 2-arm parallel study conducted in patients aged 18-60 yrs, with a centrally confirmed newly diagnosed CD20+ DLBCL, as first line of treatment. Patients received 6 cycles (C), every 21 days, of either T or R at 375 mg/m2 + CHOP. Primary objective was to compare C1 PK (AUC0-21d & Cmax). Overall Response Rate (ORR) was the key secondary objective, with C6 PK parameters, PD parameters (B-cells measured as CD19+ positive cells in peripheral blood- depletion & repletion), treatment-emergent adverse events (TEAEs), and anti-drug antibodies (ADA) as other secondary objectives. PK similarity criterion was 90% CI of geometric mean ratios (GMRs) of AUC0-21d and Cmax in C1, within 80-125%. Results: 151 patients were randomized (T, 76; R, 75). PK similarity criterion was met. The GMR T/R ratios with 90% CIs for AUC0-21d & Cmax were 100.0% (87.7, 114.0) & 96.2% (88.7, 104.4), respectively. Per protocol, ORR with 95% CI was 82.1% (69.6, 91.1) with T and 87.1% (76.1, 94.3) with R. Trough concentration (C5/C6) GMR (90% CI) of 91.3% (86.3, 96.7) for T & 94.0% (88.9, 99.5) for R indicated steady state. C6 AUC0-21d & Cmax GMR (T/R [90% CI]) were 88.9% (80.3, 98.5) and 94.6% (88.1, 101.7), respectively. T and R led to comparable B-cell depletion and repletion. Incidence of all grades of TEAEs were comparable. TEAEs ≥Grade 3 were 80.3% in T (n = 61) and 88.0% R (n = 66). Neutropenia was the most common TEAE (overall: T, 75.0%; R, 73.3% & ≥ grade 3: T, 64.5%; R, 64.0%). No neutralizing antibodies were observed in either of the arms. Conclusions: These data demonstrate that DRL-Rituximab has comparable PK, PD, efficacy, safety and immunogenicity to MabThera. MabThera already has an established efficacy in longer term follow-up. Clinical trial information: CTRI/2012/11/003129.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.003 | 0.003 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.005 | 0.002 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.001 | 0.002 |
| Scholarly communication | 0.001 | 0.002 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.003 | 0.003 |
| Insufficient payload (model declined to judge) | 0.012 | 0.002 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".