Anti-CD19 immunotherapy tafasitamab is used in combination with lenalidomide in patients with relapsed/refractory diffuse large B-cell lymphoma (DLBCL) who are ineligible for autologous stem cell transplant. Open-label, phase 1b, First-MIND study assessed safety and preliminary efficacy of tafasitamab + R-CHOP (rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone) ± lenalidomide as first-line therapy in patients with DLBCL. From December 2019 to August 2020, 83 adults with untreated DLBCL (International Prognostic Index 2-5) were screened and 66 were randomly assigned (33 per arm) to R-CHOP-tafasitamab (arm T) or R-CHOP-tafasitamab-lenalidomide (arm T/L) for 6 cycles. Primary end point was safety; secondary end points included end-of-treatment (EoT) overall response rate (ORR) and complete response (CR) rate. All patients had ≥1 treatment-emergent adverse event, mostly grade 1 or 2. Grade ≥3 neutropenia and thrombocytopenia occurred, respectively, in 57.6% and 12.1% (arm T) and 84.8% and 36.4% (arm T/L) of patients. Nonhematologic toxicities occurred at similar rates among arms. R-CHOP mean relative dose intensity was ≥89% in both arms. EoT ORR was 75.8% (CR 72.7%) in arm T and 81.8% (CR 66.7%) in arm T/L; best ORR across visits was 90.0% and 93.9%. Eighteen-month duration of response and of CR rates were 72.7% and 74.5% (arm T) and 78.7% and 86.5% (arm T/L); 24-month progression-free and overall survival rates were 72.7% and 90.3% (arm T) and 76.8% and 93.8% (arm T/L). Manageable safety and promising signals of efficacy were observed in both arms. Potential benefit of adding tafasitamab + lenalidomide to R-CHOP is being investigated in phase 3 frontMIND (NCT04824092). This study is registered at www.clinicaltrials.gov as #NCT04134936.

• MeSH
• cyklofosfamid škodlivé účinky   MeSH
• difúzní velkobuněčný B-lymfom * patologie   MeSH
• dospělí MeSH
• doxorubicin škodlivé účinky   MeSH
• lenalidomid terapeutické užití   MeSH
• lidé MeSH
• myší monoklonální protilátky škodlivé účinky   MeSH
• prednison škodlivé účinky   MeSH
• protokoly antitumorózní kombinované chemoterapie škodlivé účinky   MeSH
• rituximab škodlivé účinky   MeSH
• vinkristin škodlivé účinky   MeSH
• Check Tag
• dospělí MeSH
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• klinické zkoušky, fáze I MeSH
• práce podpořená grantem MeSH
• randomizované kontrolované studie MeSH

CONTEXT: The chemo-free immunotherapy tafasitamab + lenalidomide was granted accelerated approval in the United States (2020) and conditional approval in Canada and Europe (2021) for relapsed/refractory diffuse large B-cell lymphoma (DLBCL) in autologous stem cell transplant-ineligible adult patients. We report pharmacokinetics, pharmacodynamics, and immunogenicity in patients with newly diagnosed DLBCL after adding tafasitamab ± lenalidomide to rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone (R-CHOP) as first-line treatment. OBJECTIVE: To study the pharmacokinetics, pharmacodynamics, and immunogenicity of tafasitamab. DESIGN: Open-label, randomized, multicenter. SETTING: Fifty sites in North America and Europe. PATIENTS: Eligible patients were ≥18 years with treatment-naïve DLBCL, IPI 2-5, and ECOG PS 0-2. INTERVENTIONS: Patients were randomized 1:1 to six 21-day (D) cycles (C) of either R-CHOP (R-CHO, D1; P, D1-5) + tafasitamab (12 mg/kg IV, D1, 8, 15) (Arm A) or R-CHOP + tafasitamab + lenalidomide (25 mg orally, D1-10) (Arm B). OUTCOME MEASURES: Tafasitamab serum concentration and the number and percentage of patients developing anti-tafasitamab antibodies were secondary endpoints. NK-cell, T-cell, and B-cell counts in peripheral blood were exploratory endpoints. RESULTS: Tafasitamab serum concentrations reached steady state by C3 (geometric mean trough concentrations: Arm A, 186.40-216.55 μg/mL; Arm B, 171.77-201.54 μg/mL) and steadily declined after treatment completion. Anti-tafasitamab antibodies were detected in 1/65 (1.5%) patients and decreased during treatment. Median NK-cell counts decreased from baseline at C1D8 but were at baseline or higher levels by end-of-treatment (EoT) visit (Arm A) and C1D15 (Arm B). T-cell counts decreased from baseline at C1D8 in both arms but were at baseline or higher by C1D15 (Arm A) and EoT visit (Arm B). Median B-cell counts decreased from baseline to 0 cells/μL (Arm A, C1D15; Arm B, C1D8); at 6-month follow-up after EoT visit, B-cell counts recovered to measurable levels in ~50% of patients. CONCLUSIONS: Tafasitamab serum concentration reached and maintained a therapeutic dose level and declined after treatment completion. No patients developed treatment-induced or treatment-boosted anti-tafasitamab antibodies. Median cell counts for NK cells, T cells, and B cells were comparable between treatment arms in all cycles. FUNDING: MorphoSys AG.

• MeSH
• cyklofosfamid farmakologie   terapeutické užití   MeSH
• difúzní velkobuněčný B-lymfom * patologie   MeSH
• dospělí MeSH
• doxorubicin farmakologie   terapeutické užití   MeSH
• lenalidomid farmakologie   terapeutické užití   MeSH
• lidé MeSH
• myší monoklonální protilátky terapeutické užití   MeSH
• prednison farmakologie   terapeutické užití   MeSH
• protokoly antitumorózní kombinované chemoterapie * farmakologie   terapeutické užití   MeSH
• rituximab farmakologie   terapeutické užití   MeSH
• vinkristin farmakologie   terapeutické užití   MeSH
• výsledek terapie MeSH
• Check Tag
• dospělí MeSH
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• klinické zkoušky, fáze I MeSH
• multicentrická studie MeSH
• randomizované kontrolované studie MeSH