Last updated on May 2019

A Trial of TTI-621 for Patients With Hematologic Malignancies and Selected Solid Tumors


Brief description of study

Multicenter, open-label, phase 1a/1b trial of TTI-621 in subjects with relapsed or refractory hematologic malignancies and selected solid tumors.

Detailed Study Description

This is a trial of TTI-621 in subjects with relapsed or refractory hematologic malignancies and selected solid tumors.

TTI-621 (SIRPFc) is a soluble recombinant fusion protein created by directly linking the sequences encoding the N-terminal CD47 binding domain of human SIRP with the Fc domain of human immunoglobulin (IgG1). TTI-621 acts by binding human CD47 and preventing it from delivering an inhibitory "do not eat" (anti phagocytic) signal to macrophages.

This trial will be conducted in 2 phases and 4 parts: Phase 1a Part 1 (escalation phase) and Phase 1b Parts 2-4 (expansion phase).

In the dose Escalation Phase (phase 1a Part 1), subjects with lymphoma will be enrolled in sequential dose cohorts to receive TTI-621 to characterize safety, tolerability, pharmacokinetics, and the maximum-tolerated dose (MTD).

In the Expansion Phase (phase 1b Parts 2-4), TTI-621 will be given to subjects with a variety of hematologic malignancies and selected solid tumors to further define safety and to characterize efficacy. In the Expansion Phase Part 2, the safety and efficacy of TTI-621 will also be assessed when it is given in combination with other anti-cancer drugs. The dose of TTI-621 to be delivered in the Expansion Phase Parts 2-3 of the study may be increased or decreased based on the subject's tolerability and on the subject's response to treatment.

In the phase 1b dose optimization of the study (Part 4), further dose escalation of TTI-621, beyond the dose determined during phase 1a dose escalation, will be pursued in patients with relapsed and/or refractory CTCL following a 3+3 escalation design and using a revised DLT criteria to further evaluate the safety and tolerability of TTI-621 at dose levels higher than the initially recommended phase 1b Parts 2-3.

Secondary objectives include further characterization of the pharmacokinetics, pharmacodynamics, and development of ADA; and to gain preliminary evidence of the anti-tumor activity of TTI-621 in subjects with a variety of hematologic malignancies and selected solid tumors. In addition, the safety of TTI-621 will be evaluated in combination with other anti-cancer agents.

Clinical Study Identifier: NCT02663518

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Columbia Univeristy

New York, NY United States
8.94miles
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Memorial Sloan Kettering Cancer Center

New York, NY United States
8.95miles
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Recruitment Status: Open


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