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TTI-622 in Combination With Pembrolizumab for the Treatment of Relapsed or Refractory Diffuse Large B-Cell Lymphoma
NCT05507541 · View on ClinicalTrials.gov ↗
Study Summary
This phase II trial tests the safety, side effects, and best dose of TTI-621 (closed to enrollment) or TTI-622 in combination with pembrolizumab in treating patients with diffuse large B-cell lymphoma that has come back after a period of improvement (relapsed) or that does not respond to treatment (refractory). TTI-621 and TTI-622 are called fusion proteins. A fusion protein includes two specialized proteins that are joined together. In TTI-621 and TTI-622, one of the proteins binds with other proteins found on the surface of certain cells that are part of the immune system. The other protein targets and blocks a protein called CD47. CD47 is present on cancer cells and is used by those cells to hide from the body's immune system. By blocking CD47, TTI-621 and TTI-622 may help the immune system find and destroy cancer cells. Pembrolizumab is a monoclonal antibody directed against human cell surface receptor PD-1 (programmed death-1 or programmed cell death-1) that works by helping the body\'s immune system attack the cancer and may interfere with the ability of cancer cells to grow and spread. Giving TTI-621 (closed to enrollment) or TTI-622 in combination with pembrolizumab may kill more cancer cells in patients with relapsed or refractory diffuse large B-cell lymphoma.
Conditions Studied
Interventions
- BIOLOGICAL Pembrolizumab
- PROCEDURE Biospecimen Collection
- PROCEDURE Computed Tomography
- PROCEDURE Positron Emission Tomography
- DRUG Ontorpacept
Study Locations (2)
Iowa
- University of Iowa — Iowa City
Minnesota
- Mayo Clinic — Rochester
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 10 participants |
| Start Date | 2023-04-19 |
| Est. Completion | 2027-07-30 |
| Phase | Phase 2 |
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Full Details on ClinicalTrials.gov ↗What the Registry Record Tells You About NCT05507541
The ClinicalTrials.gov registry entry for NCT05507541 describes a study currently listed as active not recruiting. It is categorized as Phase 2, which is the standard way researchers label where a study sits along the investigational pathway from early safety work through later efficacy and post-marketing evaluation. The registered enrollment target is 10 participants, a figure that helps gauge the scale of data the investigators plan to collect. The listed sponsor is Mayo Clinic, which has 3,246 total studies on file at ClinicalTrials.gov, and sponsors are the parties responsible for study design, oversight, and regulatory filings.
The record links to 10 conditions, with Recurrent B-Cell Non-Hodgkin Lymphoma appearing as the primary indexed condition, and to 5 interventions — of which Pembrolizumab is the first listed. Interventions can include drugs, devices, procedures, behavioral programs, or observational arms, and each is tracked as a separate registry field so that downstream queries can filter accurately. When a trial lists multiple interventions, it usually reflects a multi-arm design or a comparison protocol rather than a single treatment being tested in isolation. The brief summary published in the registry is the clearest source of protocol intent and should be read before drawing conclusions from any sidebar tags.
Geographic footprint matters for practical reasons: NCT05507541 reports 2 study locations spanning 2 distinct geographic areas — top geographies include Iowa, Minnesota. A larger site network tends to correlate with broader recruitment capacity, but it does not imply anything about study quality, and site-level enrollment status can diverge from the overall registry status shown above. Every data point on this page comes from the public ClinicalTrials.gov dataset and is reproduced here for reference only; it is not a medical recommendation, an endorsement of the sponsor, or an invitation to enroll. Verify current status, eligibility criteria, and contact details directly at ClinicalTrials.gov, and discuss any participation decision with your own healthcare provider.
Frequently Asked Questions
What is clinical trial NCT05507541 about?
NCT05507541 is a clinical study titled "TTI-622 in Combination With Pembrolizumab for the Treatment of Relapsed or Refractory Diffuse Large B-Cell Lymphoma". This phase II trial tests the safety, side effects, and best dose of TTI-621 (closed to enrollment) or TTI-622 in combination with pembrolizumab in treating patients with diffuse large B-cell lymphoma that has come back after a period of improvement (relapsed) or that does not respond to treatment (...
What is the current status of trial NCT05507541?
This trial is currently active not recruiting. It is a Phase 2 study. The enrollment target is 10 participants. The study started on 2023-04-19. Estimated completion is 2027-07-30.
What conditions does trial NCT05507541 study?
This clinical trial studies the following conditions: Recurrent B-Cell Non-Hodgkin Lymphoma, Recurrent Diffuse Large B-Cell Lymphoma, Not Otherwise Specified, Recurrent Grade 3b Follicular Lymphoma, Recurrent High Grade B-Cell Lymphoma, Recurrent High Grade B-Cell Lymphoma With MYC and BCL2 or BCL6 Rearrangements. These conditions were identified from the trial registry and reflect the primary focus areas of the research.
What interventions are being tested in trial NCT05507541?
The interventions under investigation include: Pembrolizumab (BIOLOGICAL), Biospecimen Collection (PROCEDURE), Computed Tomography (PROCEDURE), Positron Emission Tomography (PROCEDURE), Ontorpacept (DRUG). Each intervention is being evaluated for safety and efficacy as part of this clinical study.
Who is sponsoring clinical trial NCT05507541?
This trial is sponsored by Mayo Clinic, which has 3,246 total clinical trials registered on ClinicalTrials.gov. The sponsor is responsible for the study's design, funding, and regulatory compliance.
Where is trial NCT05507541 being conducted?
This trial has 2 study locations across Iowa, Minnesota. Contact the study sites directly through ClinicalTrials.gov for enrollment availability.
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