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A Study to Learn About the Study Medicine (Called Maplirpacept (PF-07901801)) in Japanese With Hematologic Malignancies

A PHASE I, OPEN LABEL STUDY TO EVALUATE THE SAFETY, TOLERABILITY AND PHARMACOKINETICS OF TTI-622 (PF-07901801), A SINGLE AGENT IN JAPANESE PARTICIPANTS WITH RELAPSED OR REFRACTORY LYMPHOMA

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05567887
Enrollment
7
Registered
2022-10-05
Start date
2022-11-02
Completion date
2024-10-02
Last updated
2024-11-06

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Lymphoma, Multiple Myeloma

Keywords

Lymphoma, multiple myeloma, maplirpacept, TTI-622, PF-07901801, C4971009, Phase 1, Japan

Brief summary

The purpose of this clinical trial is to learn about how safe and tolerable is the study medicine (called maplirpacept (PF-07901801)) when taken for the treatment of lymphoma or multiple myeloma (a type of cancer that affects your body's infection-fighting cells, lymphocytes or plasma cell). This study is seeking participants who: * are 18 years of age or older * have worsening and difficult to manage type of lymphoma or multiple myeloma * Have adequately functioning organs * are not on long term use of steroids which are given either by mouth or as shots * have no major heart related disease etc. All participants in this study will receive maplirpacept (PF-07901801) as an IV infusion (given directly into a vein) at the study clinic every week. Participants will continue to receive maplirpacept (PF-07901801) until their progress of cancer worsens or the participants do not wish to take the study medicine. The experiences of the people receiving the study medicine will be collected. This will help to understand if the study medicine maplirpacept (PF-07901801), is safe and can be given to Japanese people.

Detailed description

CD47 is a cell-surface protein expressed on multiple normal cell types and often at high levels on many malignant tumor cells. Maplirpacept (PF-07901801) is a soluble recombinant fusion protein created by directly linking the sequences encoding the CD47 binding domain of human Signal Regulatory Protein alpha with the fragment crystallizable domain of human Immunoglobulin 4. maplirpacept (PF-07901801) functions as a soluble decoy receptor, preventing CD47 from delivering its antiphagocytic signal. Neutralization of the inhibitory CD47 signal enables macrophage activation and anti-tumor effects by pro-phagocytic signals present on the tumor cells. The objective of this study is to confirm safety and tolerability of single agent maplirpacept (PF-07901801) at the recommended phase 3 dose in Japanese participants with relapsed or refractory lymphoma or multiple myeloma.

Interventions

maplirpacept (PF-07901801)

Sponsors

Pfizer
Lead SponsorINDUSTRY

Study design

Allocation
NA
Intervention model
SEQUENTIAL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

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

Inclusion criteria

* Relapsed or refractory lymphoma (Hodgkin's or non-Hodgkin's) or multiple myeloma * Disease must have progressed with standard anticancer therapies * measurable disease * Capable of giving signed informed consent * Eastern cooperative oncology group performance status 0 or 1 * Adequate organ functions

Exclusion criteria

* Known, current central nervous system or interstitial lung disease involvement * History of hemolytic anemia or positive direct antiglobulin test or active bleeding disorder * Chronic use of systemic corticosteroids of more than 20 mg/day of prednisone or equivalent * Significant cardiovascular disease * Other significant medical condition unrelated to the primary malignancy * Radiation therapy within 14 days of study treatment administration * Hematopoietic stem cell transplant within 90 days before the planned start of study treatment * Antiplatelet/anticoagulant agents within 14 days before planned start of study treatment * Patients sustaining major surgery at least 4 weeks prior to study enrollment * Use of any investigational agent or any anticancer drug within 14 days before planned start of study treatment * Prior anti-CD47 and anti-Signal Regulatory Protein alpha therapy * Active, uncontrolled bacterial, fungal, or viral infection * Investigator site staff directly involved in the conduct of the study and their family members

Design outcomes

Primary

MeasureTime frameDescription
Number of Participants with Dose Limiting Toxicity (DLT) in lymphomaup to 21 daysNumber of participants with DLTs

Secondary

MeasureTime frameDescription
Number of participants with severe thrombocytopenia and anemia in R/R multiple myelomaThrough study completion, up to 18 monghsoverll safety profile of maplirpacept (PF-07901801)
Number of adverse events as characterized by typeThrough study completion, up to 18 monthsoverall safety profile of maplirpacept (PF-07901801)
Number of adverse events as characterized by frequencyThrough study completion, up to 18 monthsoverall safety profile of maplirpacept (PF-07901801)
Number of adverse events as characterized by severityThrough study completion, up to 18 monthsoverall safety profile of maplirpacept (PF-07901801)
Number of adverse events as characterized by timingThrough study completion, up to 18 monthsoverall safety profile of maplirpacept (PF-07901801)
Number of adverse events as characterized by relationship to maplirpacept (PF-07901801)Through study completion, up to 18 monthsoverall safety profile of maplirpacept (PF-07901801)
Number of adverse events as characterized by seriousnessThrough study completion, up to 18 monthsoverall safety profile of maplirpacept (PF-07901801)
Number of participants with clinically significant change from baseline in laboratory abnormalities as characterized by typeThrough study completion, up to 18 monthsoverall safety profile of maplirpacept (PF-07901801)
Number of participants with clinically significant change from baseline in laboratory abnormalities as characterized by frequencyThrough study completion, up to 18 monthsoverall safety profile of maplirpacept (PF-07901801)
Number of participants with clinically significant change from baseline in laboratory abnormalities as characterized by severityThrough study completion, up to 18 monthsoverall safety profile of maplirpacept (PF-07901801)
maximum observed concentration, steady state (ss) of maplirpacept (PF-07901801)Through study completion, up to 18 monthspharmacokinetics of maplirpacept (PF-07901801)
time to maximum concentration,ss of maplirpacept (PF-07901801)Through study completion, up to 18 monthspharmacokinetics of maplirpacept (PF-07901801)
area under the curve last,ss of maplirpacept (PF-07901801)Through study completion, up to 18 monthspharmacokinetics of maplirpacept (PF-07901801)
area under the curve tau,ss of maplirpacept (PF-07901801)Through study completion, up to 18 monthspharmacokinetics of maplirpacept (PF-07901801)
time to maximum concentration of maplirpacept (PF-07901801)Through study completion, up to 18 monthspharmacokinetics of maplirpacept (PF-07901801)
Number of participants with clinically significant change from baseline in laboratory abnormalities as characterized by timingThrough study completion, up to 18 monthsoverall safety profile of maplirpacept (PF-07901801)
area under the curve last of maplirpacept (PF-07901801)Through study completion, up to 18 monthspharmacokinetics of maplirpacept (PF-07901801)
clearance of maplirpacept (PF-07901801)Through study completion, up to 18 monthspharmacokinetics of maplirpacept (PF-07901801)
area under the curve tau of maplirpacept (PF-07901801)Through study completion, up to 18 monthspharmacokinetics of maplirpacept (PF-07901801)
volume of distribution at steady-state of maplirpacept (PF-07901801)Through study completion, up to 18 monthspharmacokinetics of maplirpacept (PF-07901801)
area under the curve tau,ss/area under the curve tau,sd of maplirpacept (PF-07901801)Through study completion, up to 18 monthspharmacokinetics of maplirpacept (PF-07901801)
area under the curve inf of maplirpacept (PF-07901801)Through study completion, up to 18 monthspharmacokinetics of maplirpacept (PF-07901801)
terminal elimination half-life off maplirpacept (PF-07901801)Through study completion, up to 18 monthspharmacokinetics of maplirpacept (PF-07901801)
maximum observed concentration of maplirpacept (PF-07901801)Through study completion, up to 18 monthspharmacokinetics of maplirpacept (PF-07901801)
Incidence and titers of anti-drug antibodies against maplirpacept (PF-07901801)Through study completion, up to 18 monthsimmunogenicity of maplirpacept (PF-07901801)
Incidence and titers of neutralizing antibodies against maplirpacept (PF-07901801)Through study completion, up to 18 monthsimmunogenicity of maplirpacept (PF-07901801)
overall response rateFrom date of registration until the date of first documented progression or date of death from any cause, cause, whichever comes first, assessed up to 18 monthspreliminary antitumor activity of maplirpacept (PF-07901801)
progression free survivalFrom date of registration until the date of first documented progression or date of death from any cause, cause, whichever comes first, assessed up to 18 monthspreliminary antitumor activity of maplirpacept (PF-07901801)
time to responseFrom date of registration until the date of first documented progression or date of death from any cause, cause, whichever comes first, assessed up to 18 monthspreliminary antitumor activity of maplirpacept (PF-07901801)
duration of responseFrom date of registration until the date of first documented progression or date of death from any cause, cause, whichever comes first, assessed up to 18 monthspreliminary antitumor activity of maplirpacept (PF-07901801)
trough concentration of maplirpacept (PF-07901801)Through study completion, up to 18 monthspharmacokinetics of maplirpacept (PF-07901801)

Countries

Japan

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026