A Phase I Clinical Study of HMPL-A83 in Patients With Advanced Malignant Neoplasm

Study Overview
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Brief Summary
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This is an open-label, first-in-human (FIH) Phase I study to evaluate the safety, tolerability, and preliminary efficacy of a humanized anti-CD47 monoclonal antibody (HMPL-A83) in patients with advanced malignant neoplasm.

Detailed Description
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This is an open-label, first-in-human (FIH) Phase I study to evaluate the safety, tolerability, and preliminary efficacy of a humanized anti-CD47 monoclonal antibody (HMPL-A83) in patients with advanced malignant neoplasm. The sample size of this study is mainly based on the design of classical 3 + 3 combined accelerated titration dose escalation with a total of 6 dose groups, and approximately 31-84 patients are expected to be enrolled. During the dose escalation, DLT-nonevaluable patients will be replaced, or the actual number of patients enrolled may exceed the planned one due to adjustment of escalation schedule during the dose escalation. It is expected that no more than 99 patients will be enrolled.

Official Title
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A Phase I, Multicenter, Open-label Clinical Study to Evaluate the Safety, Tolerability, Pharmacokinetics and Preliminary Efficacy of HMPL-A83 in Patients With Advanced Malignant Neoplasm

Conditions
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Advanced Tumors

Intervention / Treatment
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* Drug: HMPL-A83 injection


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Solid tumors/lymphomas/AML/MDS with confirmed per study protocol; Is willing and able to provide informed consent; Aged 18-75 years (inclusive); Life expectancy ≥12 weeks as judged by the investigator; Female patients of childbearing potential and male patients with partners of childbearing potential agree to use a highly effective form(s) of contraception per study protocol. Exclusion Criteria: Previous exposure to any agent targeting the CD47/SIRP alpha axis. Those concurrently participating in another interventional clinical study, excluding those concurrently participating in an observational (non-interventional) clinical study, or in the survival follow-up phase of an interventional study. Those have received any investigational drug within 4 weeks prior to the first dose of study drug (note: investigational drug refers to the drug that has not been approved for marketing in China). Those with prior anti-tumor therapy-induced toxicity (excluding alopecia or fatigue) not recovered to Grade 0 or 1 as defined by NCI CTCAE v5.0, including immune-related adverse events (irAEs) that have not recovered following immunotherapy, prior to the first dose of study treatment (≥ 4 weeks); Those expected to require other systemic anti-tumor therapies such as chemotherapy, immunotherapy, biotherapy, or hormonal therapy (except palliative radiotherapy) during the study. Those who have received prior immunotherapy such as anti-PD- (L) 1 antibody and discontinued due to ≥ Grade 3 irAEs. Those with known hereditary or acquired bleeding disorder; uncontrolled active bleeding, coagulopathy; prior history of chronic haemolytic anaemia or positive hemolysis test at screening. Patients with a history of deep venous thrombosis, pulmonary embolism, or any other serious thromboembolism within two years prior to enrollment, or those currently requiring anticoagulant or thrombolytic therapy as a therapeutic use. Those have received immunosuppressive drugs within 4 weeks prior to the first dose of study drug Those requiring long-term systemic hormonal therapy or any other immunosuppressive medication (excluding inhaled corticosteroid therapy or treatment at equivalent physiological doses). Those have received live attenuated vaccines within 4 weeks prior to the first dose of study drug or planned to receive live attenuated vaccines during the study (for solid tumors)/any type of vaccine (for lymphoma, AML, MDS). Those who have received any major surgical operation or uncured wound, ulcer or bone fracture within 4 weeks prior to the first dose of study drug.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 75 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: Other
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Other: HMPL-A83<br>Drug: HMPL-A83 The starting dose of HMPL-A83 is 0.3 mg/kg IV QW with escalating dose levels of 1, 3, 10, 20, and 30 mg/kg IV QW, in 28-day treatment cycles. | Drug: HMPL-A83 injection<br>* Day 1,8,15,22 dose; 28 day treatment cycles.<br>* Other names: HMPL-A83;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| safety information/AE,SAE | To evaluate the safety and tolerability of HMPL-A83 in patients with advanced tumors | up to 3 years | 
| MTD and RP2D | To determine the maximum tolerated dose (MTD) and/or the recommended phase II dose (RP2D) of HMPL-A83 in patients with advanced tumors. | up to 2 years | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| PK endpoints | To investigate the pharmacokinetic (PK) profile of HMPL-A83 in patients with advanced tumors, including but not limited to the maximum plasma concentration (Cmax), trough concentration (Ctrough or Cmin), elimination half-life (t1/2), area under the plasma concentration-time curve (AUC0-t, AUC0-∞, AUC0-τ), apparent clearance (CL), apparent volume of distribution at steady state (Vss), etc. | up to 3 years | 
| Efficacy endpoints | objective response rate (ORR) | up to 3 years | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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CD47, HMPL-A83