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A Study Evaluating the Efficacy and Safety of Pirtobrutinib in Participants With Relapsed or Refractory Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma

A Phase 2, Open-Label, Randomized Study Evaluating the Efficacy and Safety of 3 Doses of Pirtobrutinib in Participants With Relapsed or Refractory Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma Who Previously Received Treatment With a Covalent Bruton Tyrosine Kinase Inhibitor

Status
Recruiting
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06588478
Enrollment
249
Registered
2024-09-19
Start date
2025-01-03
Completion date
2028-12-01
Last updated
2026-05-19

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Chronic Lymphocytic Leukemia, Small Lymphocytic Lymphoma

Brief summary

The main purpose of Part 1 of this study is to assess the efficacy and safety of 3 dose levels of Pirtobrutinib in participants with chronic lymphocytic leukemia (CLL) or small lymphocytic lymphoma (SLL), who have received 1-3 lines of treatment including a covalent Bruton tyrosine kinase (BTK) inhibitor. The purpose of Part 2 of this study is to evaluate pirtobrutinib monotherapy in participants with treatment-naïve CLL/SLL with 17p deletions. Participation in Part 1 is expected to last approximately 3 years. Participation in Part 2 is expected to last up to 2 years.

Interventions

DRUGPirtobrutinib

Administered Orally.

Sponsors

Loxo Oncology, Inc.
Lead SponsorINDUSTRY
Eli Lilly and Company
CollaboratorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Masking description

Part 2 is non-randomized

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Have confirmed diagnosis of CLL/SLL as defined by iwCLL 2018 criteria. * Part 1: Have received prior CLL/SLL treatment * Have received at least 1, but not more than 3 lines of prior treatment for CLL/SLL * Have received a covalent BTK inhibitor * Part 2: Have received no prior treatment for CLL/SLL * Part 1 - Known 17p deletion status (positive or negative) * Part 2 - Must have 17p deletion (positive) * Have a requirement for therapy consistent with iwCLL 2018 criteria for initiation of therapy * Capable of swallowing oral study medication. * Have an Eastern Cooperative Oncology Group Performance Status (ECOG) score of 0 to 2.

Exclusion criteria

* Have received prior treatment with a BTK degrader or a noncovalent BTK inhibitor * Have a history of greater than or equal to (\>=) Grade 3 bleeding due to treatment with a BTK inhibitor * Have known or suspected Richter's transformation * Have known or suspected history of central nervous system involvement by CLL/SLL * Previous or concurrent cancer distinct from CLL/SLL within 3 years before randomization. Exceptions may occur with documented sponsor approval. Examples include: * nonmelanoma skin cancer or lentigo malignant melanoma * cervical carcinoma in situ * localized prostate cancer undergoing active surveillance, and * localized (for example, lymph node negative) breast cancer with no evidence of active disease present for more than 3 years. Individual may be receiving adjuvant hormonal therapy

Design outcomes

Primary

MeasureTime frameDescription
Overall Response RateBaseline up to 3 yearsOverall response rate is defined as the proportion of participants who achieve the best overall response at or before the initiation of subsequent anticancer therapy of CR, CRi, nPR, or PR. ORR will be assessed using International Workshop on Chronic Lymphocytic Leukemia (iwCLL) 2018 response criteria.

Secondary

MeasureTime frameDescription
Duration of ResponseBaseline up to 3 yearsDuration of response is defined as the time from the date of the first documented CR, CRi, nPR, or PR to disease progression (per iwCLL 2018) or death from any cause.

Countries

Australia, Belgium, Canada, Czechia, Denmark, France, Germany, Greece, Hungary, Italy, Poland, Romania, Slovakia, South Korea, Spain, Turkey (Türkiye), United Kingdom, United States

Contacts

CONTACTTrial questions or participation questions: 1-877-CTLILLY (1-877-285-4559) or
LillyTrials@Lilly.com1-317-615-4559
CONTACTPhysicians interested in becoming principal investigators please contact
clinical_inquiry_hub@lilly.com
STUDY_DIRECTORCall 1-877-CTLILLY (1-877-285-4559) or 1-317-615-4559 Mon - Fri 8 AM - 8 PM Eastern time (UTC/GMT - 5 hours, EST)

Eli Lilly and Company

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: May 20, 2026