1. Sintilimab (anti-PD-1 antibody) plus chidamide (histone deacetylase inhibitor) in relapsed or refractory extranodal natural killer T-cell lymphoma (SCENT): a phase Ib/II study.
- Author
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Gao Y, He H, Li X, Zhang L, Xu W, Feng R, Li W, Xiao Y, Liu X, Chen Y, Wang X, Bai B, Wu H, Cai Q, Li Z, Li J, Lin S, He Y, Ping L, Huang C, Mao J, Chen X, Zhao B, and Huang H
- Subjects
- Humans, Male, Female, Middle Aged, Aged, Adult, Programmed Cell Death 1 Receptor antagonists & inhibitors, Programmed Cell Death 1 Receptor immunology, Benzamides administration & dosage, Benzamides therapeutic use, Benzamides adverse effects, Lymphoma, Extranodal NK-T-Cell drug therapy, Lymphoma, Extranodal NK-T-Cell pathology, Histone Deacetylase Inhibitors therapeutic use, Histone Deacetylase Inhibitors administration & dosage, Histone Deacetylase Inhibitors adverse effects, Antibodies, Monoclonal, Humanized therapeutic use, Antibodies, Monoclonal, Humanized administration & dosage, Antibodies, Monoclonal, Humanized adverse effects, Aminopyridines administration & dosage, Aminopyridines adverse effects, Antineoplastic Combined Chemotherapy Protocols therapeutic use, Antineoplastic Combined Chemotherapy Protocols adverse effects
- Abstract
Anti-PD-1 antibodies are a favorable treatment for relapsed or refractory extranodal natural killer T cell lymphoma (RR-ENKTL), however, the complete response (CR) rate and the duration of response (DOR) need to be improved. This phase 1b/2 study investigated the safety and efficacy of sintilimab, a fully human anti-PD-1 antibody, plus chidamide, an oral subtype-selective histone deacetylase inhibitor in 38 patients with RR-ENKTL. Expected objective response rate (ORR) of combination treatment was 80%. Patients received escalating doses of chidamide, administered concomitantly with fixed-dose sintilimab in 21-days cycles up to 12 months. No dose-limiting events were observed, RP2D of chidamide was 30 mg twice a week. Twenty-nine patients were enrolled in phase 2. In the intention-to-treat population (n = 37), overall response rate was 59.5% with a complete remission rate of 48.6%. The median DOR, progression-free survival (PFS), and overall survival (OS) were 25.3, 23.2, and 32.9 months, respectively. The most common grade 3 or higher treatment-emergent adverse events (AEs) were neutropenia (28.9%) and thrombocytopenia (10.5%), immune-related AEs were reported in 18 (47.3%) patients. Exploratory biomarker assessment suggested that a combination of dynamic plasma ctDNA and EBV-DNA played a vital prognostic role. STAT3 mutation shows an unfavorable prognosis. Although outcome of anticipate ORR was not achieved, sintilimab plus chidamide was shown to have a manageable safety profile and yielded encouraging CR rate and DOR in RR-ENKTL for the first time. It is a promising therapeutic option for this population., (© 2024. The Author(s).)
- Published
- 2024
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