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

Study Overview
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Brief Summary
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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
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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.

Official Title
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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 HEMATOLOGIC MALIGNANCIES

Conditions
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Lymphoma, Multiple Myeloma

Intervention / Treatment
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* Drug: maplirpacept (PF-07901801)


Participation Criteria
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Eligibility Criteria
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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

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Intervention Model: Sequential Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: maplirpacept (PF-07901801)<br>maplirpacept (PF-07901801) | Drug: maplirpacept (PF-07901801)<br>* maplirpacept (PF-07901801)<br>* Other names: TTI-622;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of Participants with Dose Limiting Toxicity (DLT) in lymphoma | Number of participants with DLTs | up to 21 days | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of adverse events as characterized by type | overall safety profile of maplirpacept (PF-07901801) | Through study completion, up to 18 months | 
| Number of adverse events as characterized by frequency | overall safety profile of maplirpacept (PF-07901801) | Through study completion, up to 18 months | 
| Number of adverse events as characterized by severity | overall safety profile of maplirpacept (PF-07901801) | Through study completion, up to 18 months | 
| Number of adverse events as characterized by timing | overall safety profile of maplirpacept (PF-07901801) | Through study completion, up to 18 months | 
| Number of adverse events as characterized by relationship to maplirpacept (PF-07901801) | overall safety profile of maplirpacept (PF-07901801) | Through study completion, up to 18 months | 
| Number of adverse events as characterized by seriousness | overall safety profile of maplirpacept (PF-07901801) | Through study completion, up to 18 months | 
| Number of participants with clinically significant change from baseline in laboratory abnormalities as characterized by type | overall safety profile of maplirpacept (PF-07901801) | Through study completion, up to 18 months | 
| Number of participants with clinically significant change from baseline in laboratory abnormalities as characterized by frequency | overall safety profile of maplirpacept (PF-07901801) | Through study completion, up to 18 months | 
| Number of participants with clinically significant change from baseline in laboratory abnormalities as characterized by severity | overall safety profile of maplirpacept (PF-07901801) | Through study completion, up to 18 months | 
| Number of participants with clinically significant change from baseline in laboratory abnormalities as characterized by timing | overall safety profile of maplirpacept (PF-07901801) | Through study completion, up to 18 months | 
| Number of participants with severe thrombocytopenia and anemia in R/R multiple myeloma | overll safety profile of maplirpacept (PF-07901801) | Through study completion, up to 18 monghs | 
| maximum observed concentration, steady state (ss) of maplirpacept (PF-07901801) | pharmacokinetics of maplirpacept (PF-07901801) | Through study completion, up to 18 months | 
| time to maximum concentration,ss of maplirpacept (PF-07901801) | pharmacokinetics of maplirpacept (PF-07901801) | Through study completion, up to 18 months | 
| area under the curve last,ss of maplirpacept (PF-07901801) | pharmacokinetics of maplirpacept (PF-07901801) | Through study completion, up to 18 months | 
| area under the curve tau,ss of maplirpacept (PF-07901801) | pharmacokinetics of maplirpacept (PF-07901801) | Through study completion, up to 18 months | 
| time to maximum concentration of maplirpacept (PF-07901801) | pharmacokinetics of maplirpacept (PF-07901801) | Through study completion, up to 18 months | 
| trough concentration of maplirpacept (PF-07901801) | pharmacokinetics of maplirpacept (PF-07901801) | Through study completion, up to 18 months | 
| area under the curve last of maplirpacept (PF-07901801) | pharmacokinetics of maplirpacept (PF-07901801) | Through study completion, up to 18 months | 
| clearance of maplirpacept (PF-07901801) | pharmacokinetics of maplirpacept (PF-07901801) | Through study completion, up to 18 months | 
| area under the curve tau of maplirpacept (PF-07901801) | pharmacokinetics of maplirpacept (PF-07901801) | Through study completion, up to 18 months | 
| volume of distribution at steady-state of maplirpacept (PF-07901801) | pharmacokinetics of maplirpacept (PF-07901801) | Through study completion, up to 18 months | 
| area under the curve tau,ss/area under the curve tau,sd of maplirpacept (PF-07901801) | pharmacokinetics of maplirpacept (PF-07901801) | Through study completion, up to 18 months | 
| area under the curve inf of maplirpacept (PF-07901801) | pharmacokinetics of maplirpacept (PF-07901801) | Through study completion, up to 18 months | 
| terminal elimination half-life off maplirpacept (PF-07901801) | pharmacokinetics of maplirpacept (PF-07901801) | Through study completion, up to 18 months | 
| maximum observed concentration of maplirpacept (PF-07901801) | pharmacokinetics of maplirpacept (PF-07901801) | Through study completion, up to 18 months | 
| Incidence and titers of anti-drug antibodies against maplirpacept (PF-07901801) | immunogenicity of maplirpacept (PF-07901801) | Through study completion, up to 18 months | 
| Incidence and titers of neutralizing antibodies against maplirpacept (PF-07901801) | immunogenicity of maplirpacept (PF-07901801) | Through study completion, up to 18 months | 
| overall response rate | preliminary antitumor activity of maplirpacept (PF-07901801) | From 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 months | 
| progression free survival | preliminary antitumor activity of maplirpacept (PF-07901801) | From 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 months | 
| time to response | preliminary antitumor activity of maplirpacept (PF-07901801) | From 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 months | 
| duration of response | preliminary antitumor activity of maplirpacept (PF-07901801) | From 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 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Lymphoma, multiple myeloma, maplirpacept, TTI-622, PF-07901801, C4971009, Phase 1, Japan