Testing EXS73565 for patients with relapsed or refractory B-cell cancers

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

Phase 1 Interventional Exscientia AI Limited · NCT06980116

This study is testing a new oral medication called EXS73565 to see if it can help adults with B-cell cancers that haven't responded to other treatments.

Quick facts

PhasePhase 1
Study typeInterventional
Enrollment50 (estimated)
Ages18 Years and up
SexAll
SponsorExscientia AI Limited Industry-sponsored
Drugs / interventionschemotherapy, immunotherapy, radiation
Locations4 sites (Madrid and 3 other locations)
Trial IDNCT06980116 on ClinicalTrials.gov

What this trial studies

This study aims to evaluate the safety, tolerability, pharmacokinetics, pharmacodynamics, and preliminary antitumor activity of the oral medication EXS73565 in patients with relapsed or refractory B-cell malignancies. Participants will be adults aged 18 and older who have been diagnosed with specific types of B-cell cancers and have not responded to standard treatments. The study will involve administering EXS73565 as a single agent to assess its effects on the targeted malignancies.

Who should consider this trial

Good fit: Ideal candidates are adults with relapsed or refractory B-cell malignancies who have exhausted standard treatment options.

Not a fit: Patients with active central nervous system malignancies or those with concurrent malignancies may not benefit from this study.

Why it matters

Potential benefit: If successful, this treatment could provide a new therapeutic option for patients with difficult-to-treat B-cell malignancies.

How similar studies have performed: Other studies have shown promise with similar approaches in targeting B-cell malignancies, but this specific treatment is novel.

Eligibility criteria

Show full inclusion / exclusion 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, or marginal zone lymphoma.
* 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 21 days or 5 half-lives (whichever is longer) before the first dose of the study treatment.

Where this trial is running

Madrid and 3 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Relapsed or Refractory B-cell Malignancies
Last reviewed 2026-06-09 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.