NCT04771507

A Pilot Study on Intermittent Ibrutinib in Patients With Advanced-phase Chronic Lymphocytic Leukemia (CLL)

A Pilot Study on Intermittent and Repeated Dosing of Ibrutinib in the Treatment of Patients With Advanced-phase Chronic Lymphocytic Leukemia (CLL)

• Status: Recruiting
• Phase: Phase 1 / Phase 2
• Study type: Interventional
• Enrollment: 50 (estimated)
• Sponsor: Jeanette Lundin · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

Ibrutinib, an inhibitor of Bruton´s tyrosine kinase (BTK) is approved in CLL as continuous, daily administration of 420 mg orally until progression. Ibrutinib drug costs in health care are rapidly increasing and are difficult to predict, as long-term follow up analyses have shown that many patients remain on therapy for several years, in some cases even many years. It has been observed that patients who stop ibrutinib due to side effects may often remain with continued CLL disease control i.e. in stable partial remission even when off ibrutinib therapy. There are also emerging data on mutations within BTK, with loss of efficacy of ibrutinib, during long-term continuous administration. These observations raise the question whether alternative dosing strategies may be feasible. This pilot study will explore intermittent and repeated dosing of ibrutinib, until alternative therapy is required due to resistance or intolerance to ibrutinib. An "ON-OFF" dosing strategy will be applied, where advanced-phase CLL patients who have received at least 6 months of ibrutinib and who have achieved a stable PR will stop ibrutinib and be followed off therapy until clinical progression, at which ibrutinib will be re-instituted. Such "ON-OFF" ibrutinib cycles may be repeated until non-tolerability or resistance, or need of continuous dosing of ibrutinib (i.e. early progression when off the drug). If successful, the study will indicate a way forward towards reducing ibrutinib drug costs in health care without affecting long-term disease control, possibly also with fewer ibrutinib-related side effects due to a lower cumulative dose of ibrutinib. Long-term effects on potential mutations within BTK and its downstream signaling molecules will also be analysed.

Conditions

• Chronic Lymphocytic Leukemia
• Small Lymphocytic Lymphoma

Interventions

Type	Name	Description
DRUG	Ibrutinib	Ibrutinib will be stopped at inclusion in the and the patient will be followed OFF therapy. At clinical progress, ibrutinib will be restarted (ON period) at the same standard dose as used at inclusion. When the patient achieve at least partial response again, a new OFF period is started, and so on.

Timeline

• Start date: 2018-02-23
• Primary completion: 2023-04-01
• Completion: 2027-12-01
• First posted: 2021-02-25
• Last updated: 2021-02-25

Locations

9 sites across 2 countries: Norway, Sweden