A retrospective observational study to evaluate the clinical outcomes and routine management of patients with chronic lymphocytic leukaemia treated with idelalisib and rituximab in the UK and Ireland (RETRO‐idel)

Summary Idelalisib (IDL) is an oral first‐in‐class phosphatidylinositol 3‐kinase delta (PI3Kδ) inhibitor approved for chronic lymphocytic leukaemia (CLL) alongside rituximab (R) since 2014. However, little data exist on routine practice. The RETRO‐idel was a protocol‐led, retrospective study of 110...

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Veröffentlicht in:British journal of haematology 2021-07, Vol.194 (1), p.69-77
Hauptverfasser: Eyre, Toby A., Preston, Gavin, Kagdi, Huseini, Islam, Amin, Nicholson, Toby, Smith, Harry W., Cursley, Adam P., Ramroth, Heribert, Xing, Guan, Gu, Lin, Rajakumaraswamy, Nishanthan, Fegan, Christopher
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container_issue 1
container_start_page 69
container_title British journal of haematology
container_volume 194
creator Eyre, Toby A.
Preston, Gavin
Kagdi, Huseini
Islam, Amin
Nicholson, Toby
Smith, Harry W.
Cursley, Adam P.
Ramroth, Heribert
Xing, Guan
Gu, Lin
Rajakumaraswamy, Nishanthan
Fegan, Christopher
description Summary Idelalisib (IDL) is an oral first‐in‐class phosphatidylinositol 3‐kinase delta (PI3Kδ) inhibitor approved for chronic lymphocytic leukaemia (CLL) alongside rituximab (R) since 2014. However, little data exist on routine practice. The RETRO‐idel was a protocol‐led, retrospective study of 110 patients [n = 27 front‐line (1L)] who received IDL‐R. The primary end‐point was clinical overall response rate (ORR). The median (range) follow‐up of the whole cohort was 30·2 (0·1–51·9) months. The median (range) age was 72 (48–89) years. Tumour protein p53‐disruption was common [100% 1L, 32·5% relapsed/refractory (R/R)]. The best ORR (intention‐to‐treat) was 88·2% (1L 96·3%, R/R 85·5%). Overall, the median event‐free survival (mEFS) was 20·3 months and time‐to‐next treatment was 29·2 months. The mEFS for 1L patients was 18·7 months and R/R patients was 21·7 months. The 3‐year overall survival was 56·1% (95% confidence interval 45·7–65·3). IDL was discontinued in 87·3% (n = 96). More patients discontinued due to adverse events in the front‐line setting (1L 63·0% vs. R/R 44·6%) and due to progressive disease in R/R patients (20·5% vs. 3·7% in 1L). Lower respiratory tract infection/pneumonia were reported in 34·5% (Grade ≥3, 19·1%), diarrhoea in 30·9% (Grade ≥3, 6·4%), and colitis in 9·1% (Grade ≥3, 5·5%). Overall, these data describe clear efficacy for IDL‐R in routine practice. No new safety signals were identified, although careful management of known toxicities is required.
doi_str_mv 10.1111/bjh.17475
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Lower respiratory tract infection/pneumonia were reported in 34·5% (Grade ≥3, 19·1%), diarrhoea in 30·9% (Grade ≥3, 6·4%), and colitis in 9·1% (Grade ≥3, 5·5%). Overall, these data describe clear efficacy for IDL‐R in routine practice. 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Lower respiratory tract infection/pneumonia were reported in 34·5% (Grade ≥3, 19·1%), diarrhoea in 30·9% (Grade ≥3, 6·4%), and colitis in 9·1% (Grade ≥3, 5·5%). Overall, these data describe clear efficacy for IDL‐R in routine practice. 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However, little data exist on routine practice. The RETRO‐idel was a protocol‐led, retrospective study of 110 patients [n = 27 front‐line (1L)] who received IDL‐R. The primary end‐point was clinical overall response rate (ORR). The median (range) follow‐up of the whole cohort was 30·2 (0·1–51·9) months. The median (range) age was 72 (48–89) years. Tumour protein p53‐disruption was common [100% 1L, 32·5% relapsed/refractory (R/R)]. The best ORR (intention‐to‐treat) was 88·2% (1L 96·3%, R/R 85·5%). Overall, the median event‐free survival (mEFS) was 20·3 months and time‐to‐next treatment was 29·2 months. The mEFS for 1L patients was 18·7 months and R/R patients was 21·7 months. The 3‐year overall survival was 56·1% (95% confidence interval 45·7–65·3). IDL was discontinued in 87·3% (n = 96). More patients discontinued due to adverse events in the front‐line setting (1L 63·0% vs. R/R 44·6%) and due to progressive disease in R/R patients (20·5% vs. 3·7% in 1L). Lower respiratory tract infection/pneumonia were reported in 34·5% (Grade ≥3, 19·1%), diarrhoea in 30·9% (Grade ≥3, 6·4%), and colitis in 9·1% (Grade ≥3, 5·5%). Overall, these data describe clear efficacy for IDL‐R in routine practice. No new safety signals were identified, although careful management of known toxicities is required.</abstract><cop>England</cop><pub>Blackwell Publishing Ltd</pub><pmid>34121184</pmid><doi>10.1111/bjh.17475</doi><tpages>9</tpages><orcidid>https://orcid.org/0000-0002-6631-9749</orcidid><orcidid>https://orcid.org/0000-0002-0575-8844</orcidid><orcidid>https://orcid.org/0000-0001-9685-0621</orcidid><oa>free_for_read</oa></addata></record>
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1365-2141
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source MEDLINE; Wiley Online Library Journals Frontfile Complete; Wiley Online Library Free Content
subjects Adverse events
Aged
Antineoplastic Combined Chemotherapy Protocols - adverse effects
Antineoplastic Combined Chemotherapy Protocols - therapeutic use
B‐cell receptor inhibitor
chronic lymphocytic leukaemia
Chronic lymphocytic leukemia
Colitis
Diarrhea
Enzyme inhibitors
Female
Gastrointestinal Diseases - chemically induced
Haematological malignancy ‐ Clinical
Hematologic Diseases - chemically induced
Hematology
Humans
idelalisib
Ireland - epidemiology
Kaplan-Meier Estimate
Kinases
Leukemia
Leukemia, Lymphocytic, Chronic, B-Cell - drug therapy
Leukemia, Lymphocytic, Chronic, B-Cell - epidemiology
Male
Middle Aged
Observational studies
p53 Protein
Patients
Phosphoinositide-3 Kinase Inhibitors - administration & dosage
PI3K
Progression-Free Survival
Purines - administration & dosage
Purines - adverse effects
Quinazolinones - administration & dosage
Quinazolinones - adverse effects
Research Paper
Respiratory tract diseases
Respiratory Tract Diseases - chemically induced
retrospective
Retrospective Studies
Rituximab
Rituximab - administration & dosage
Rituximab - adverse effects
Salvage Therapy
Survival
Treatment Outcome
Tumors
United Kingdom - epidemiology
title A retrospective observational study to evaluate the clinical outcomes and routine management of patients with chronic lymphocytic leukaemia treated with idelalisib and rituximab in the UK and Ireland (RETRO‐idel)
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