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Dose Determining Study of EXS73565 in Participants With Relapsed or Refractory B-Cell Malignancies

A Phase 1 Open-label, Multicenter, Dose Escalation Study to Assess the Safety, Tolerability, Pharmacokinetics, Pharmacodynamics, and Preliminary Efficacy of EXS73565 in Participants With Relapsed or Refractory B-cell Malignancies

Status
Recruiting
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06980116
Enrollment
85
Registered
2025-05-20
Start date
2025-03-31
Completion date
2028-12-01
Last updated
2026-08-13

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 (CLL/SLL), Diffuse-large B-cell Lymphoma (DLBCL), Follicular Lymphoma (FL), Mantle Cell Lymphoma (MCL), Marginal Zone Lymphoma (MZL), Relapsed or Refractory B-cell Malignancies, Waldenstrom's Macroglobulinemia (WM)

Keywords

B-cell Malignancies, Chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL), Follicular Lymphoma (FL), Marginal Zone Lymphoma (MZL), Mantle Cell Lymphoma (MCL), Diffuse-large B-cell Lymphoma (DLBCL), Waldenstrom's Macroglobulinemia (WM), MALT1

Brief summary

The purpose of this study is to characterize the safety, tolerability, pharmacokinetics, pharmacodynamics, and preliminary antitumor activity of EXS73565 administered orally as a single agent in participants with relapsed/refractory B-cell malignancies.

Interventions

DRUGEXS73565

EXS73565 oral administration

Sponsors

Exscientia AI Ltd., a wholly owned subsidiary of Recursion Pharmaceuticals, Inc.
Lead SponsorINDUSTRY

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

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

Inclusion criteria

Key Inclusion Criteria: * Age ≥18 years at the time of signing the informed consent. * Eastern Cooperative Oncology Group (ECOG) performance status of 0-1. * Histologically confirmed diagnosis of one of the following B-cell malignancies: chronic lymphocytic leukemia (CLL), including Richter's transformation from CLL, mantle-cell lymphoma, diffuse large B-cell lymphoma, follicular lymphoma, marginal zone lymphoma, or waldenström macroglobulinaemia. * Participants that have relapsed after standard of care or have progressed during standard of care or are not suitable for standard of care therapy Key

Exclusion criteria

* Any medical or psychiatric condition that, in the view of the Principal Investigator, could jeopardize or would compromise the participant's safety or ability to participate in the study. * Known central nervous system (CNS) malignancy or primary CNS lymphoma. * Concurrent active or previous malignancy (other than the primary lymphoma/CLL for which the participant will be treated on this protocol within 5 years prior to randomization; participants with prior cancers may be enrolled with documented Sponsor approval. * Received anticancer therapy, including chemotherapy, immunotherapy, radiation therapy (with the exception of palliative radiotherapy), biologic therapy, cancer-related hormonal therapy, or any investigational therapy within 14 days or 5 half-lives (whichever is shorter) before the first dose of the study treatment.

Design outcomes

Primary

MeasureTime frame
Number of Participants with Treatment-emergent Adverse Events (TEAEs)Up to 282 days
Number of Participants With Dose-limiting toxicities (DLTs)Up to 28 days

Secondary

MeasureTime frame
Time to Maximum Concentration (Tmax) of EXS73565-001Up to 253 days
Area Under the Concentration-time Curve from Time Zero to the Time of the Last Quantifiable Concentration AUC(0-last) of EXS73565-001Up to 253 days
Maximum Concentration (Cmax) of EXS73565-001Up to 253 days
Overall Response Rate (ORR)Up to 434 days
Progression Free SurvivalUp to 434 days
Duration of ResponseUp to 434 days
Time to RespondUp to 434 days
Time to ProgressionUp to 434 days
Overall Survival12 and 24 months

Countries

Georgia, Greece, Moldova, Poland, Spain, Ukraine, United Kingdom

Contacts

CONTACTExscientia AI Ltd.
clinicaltrials@recursion.com385-374-1724

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Aug 14, 2026