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Sancho JM, Abrisqueta P, Kumar A, Cordoba R, Tani M, Langmuir P, Rappold E, Liu T, Lopez-Guillermo A. Safety and efficacy of parsaclisib in combination with rituximab, bendamustine + rituximab, or ibrutinib in patients with previously treated B-cell lymphoma: analysis of a phase 1 dose-finding study (CITADEL‑112). Leuk Lymphoma 2024; 65:911-921. [PMID: 38598516 DOI: 10.1080/10428194.2024.2331626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 02/14/2024] [Indexed: 04/12/2024]
Abstract
Parsaclisib, a potent and highly selective phosphoinositide 3-kinase δ inhibitor, has shown clinical activity in relapsed/refractory (R/R) B-cell lymphoma. The phase 1 CITADEL-112 (NCT03424122) study assessed safety and efficacy of parsaclisib in combination with investigator choice standard of care (SOC; rituximab [Treatment A], rituximab plus bendamustine [Treatment B], or ibrutinib [Treatment C]) in 50 patients with R/R B-cell lymphoma. The most common treatment-emergent adverse events included neutropenia (62.5%, 50.0%, and 50.0% of patients in Treatments A, B, and C, respectively); diarrhea (37.5%) and anemia (31.3%) in Treatment A; abdominal pain, asthenia, diarrhea, and nausea (each 33.3%) in Treatment B; and increased alanine and aspartate aminotransferase (each 37.5%) in Treatment C. Objective responses were observed in 13 patients (81.3%) in Treatment A, 10 (55.6%) in Treatment B, and 8 (50.0%) in Treatment C. Parsaclisib combined with SOC therapies had an expected safety profile and promising efficacy in patients with R/R B-cell lymphomas.
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Affiliation(s)
- Juan-Manuel Sancho
- Clinical Hematology Department, IJC, Hospital Germans Trias i Pujol, Institut Català d'Oncologia, Barcelona, Spain
| | - Pau Abrisqueta
- Department of Hematology, Vall d'Hebron Institute of Oncology (VHIO), Hospital Universitari Vall d'Hebron, Barcelona, Spain
| | | | - Raul Cordoba
- Lymphoma Unit, Department of Hematology, Fundacion Jimenez Diaz University Hospital, Health Research Institute IIS-FJD, Madrid, Spain
| | - Monica Tani
- Haematology Unit Santa Maria delle Croci Hospital, Ravenna, Italy
| | | | | | - Teng Liu
- Incyte Corporation, Wilmington, DE, USA
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Phillips TJ, Avigdor A, Gurion R, Patti C, Corradini P, Tani M, Mehta A, Lossos IS, Zinzani PL, Thieblemont C, Jurczak W, Zheng F, Rappold E, Zhao W, Jiang P, Johnson P. A phase 2 study of the PI3Kδ inhibitor parsaclisib in relapsed and refractory marginal zone lymphoma (CITADEL-204). Blood Adv 2024; 8:867-877. [PMID: 38113459 PMCID: PMC10875254 DOI: 10.1182/bloodadvances.2023010648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 11/02/2023] [Accepted: 11/07/2023] [Indexed: 12/21/2023] Open
Abstract
ABSTRACT Parsaclisib, a potent and highly selective PI3Kδ inhibitor, has shown clinical benefit in patients with relapsed or refractory (R/R) B-cell lymphomas. The phase 2 CITADEL-204 study (NCT03144674, EudraCT 2017-000970-12) assessed efficacy and safety of parsaclisib in Bruton tyrosine kinase (BTK) inhibitor-experienced (cohort 1) or BTK inhibitor-naive (cohort 2) patients with R/R marginal zone lymphoma (MZL). Patients aged ≥18 years with histologically confirmed R/R MZL, treated with ≥1 prior systemic therapy (including ≥1 anti-CD20 antibody) received parsaclisib 20 mg once daily for 8 weeks then 20 mg once weekly (weekly dosing group [WG]) or parsaclisib 20 mg once daily for 8 weeks then 2.5 mg once daily (daily dosing group [DG]); DG was selected for further assessment. Primary end point of the study was objective response rate (ORR). Owing to slower than expected recruitment, cohort 1 was closed with 10 patients (WG, n = 4; DG, n = 6) enrolled. Based on a planned interim analysis in cohort 2, the futility boundary was not crossed, and enrollment continued to study completion. At data cutoff (15 January 2021), 100 patients were enrolled and treated in cohort 2 (WG, n = 28; DG, n = 72). In the DG, the ORR was 58.3% (95% confidence interval [CI], 46.1-69.8), with a complete response rate of 4.2% (95% CI, 0.9-11.7); the lower bound of the ORR 95% CI exceeded the protocol-defined threshold of 40%. The median duration of response was 12.2 months (95% CI, 8.1-17.5) and progression-free survival was 16.5 months (95% CI, 11.5-20.6); median overall survival was not reached. The most common treatment-emergent adverse events (TEAEs) among all patients were diarrhea (47.0%), cough (23.0%), and rash (18.0%); the most common grade ≥3 TEAEs included diarrhea (12.0%), neutropenia, and pneumonia (9.0% each). TEAEs led to dose interruptions, reductions, and discontinuations in 56.0%, 16.0%, and 29.0% of all patients, respectively. Durable responses and an overall manageable safety profile were demonstrated in patients with R/R MZL treated with parsaclisib monotherapy.
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Affiliation(s)
| | - Abraham Avigdor
- Institute of Hematology, Sheba Medical Center, Ramat Gan, Israel
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Ronit Gurion
- Institute of Hematology, Rabin Medical Center & Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Caterina Patti
- Department of Hematology I, Azienda Ospedali Riuniti Villa Sofia-Cervello, Palermo, Italy
| | - Paolo Corradini
- University of Milano Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Monica Tani
- Ospedale di Ravenna, Azienda Unità Sanitaria Locale della Romagna, Ravenna, Italy
| | | | - Izidore S. Lossos
- Sylvester Comprehensive Cancer Center, University of Miami, Miami, FL
| | - Pier Luigi Zinzani
- IRCCS Azienda Ospedaliero-Universitaria di Bologna, Istituto di Ematologia “Seràgnoli,” Bologna, Italy
- Dipartimento di Medicina Specialistica, Diagnostica e Sperimentale, Università di Bologna, Bologna, Italy
| | - Catherine Thieblemont
- Université de Paris; APHP, Hôpital Saint-Louis, Hémato-oncologie, Paris Diderot, Paris, France
| | - Wojciech Jurczak
- Maria Sklodowska-Curie National Research Institute of Oncology, Kraków, Poland
| | | | | | | | | | - Peter Johnson
- School of Cancer Sciences, University of Southampton, Southampton, United Kingdom
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