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

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.

Eligibility

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.

Conditions2

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