TJ202 Combined With Dexamethasone in Subjects With Relapsed or Refractory Multiple Myeloma

Study Overview
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Brief Summary
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This trial is a multi-center, single-arm phase 2 study to evaluate the efficacy and safety of TJ202 combined with dexamethasone in subjects with relapsed or refractory multiple myeloma (RRMM) who received at least 2 prior lines of treatment.

Detailed Description
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A total of 82 subjects with relapsed or refractory multiple myeloma (RRMM) who have received at least 2 prior lines of treatment will be enrolled in this study. Prior lines of treatment must include a proteasome inhibitor (PI) and an immunomodulator (IMiD). All subjects will receive TJ202 and dexamethasone (DEX) in the study. The treatment will continue until endpoint events such as intolerance or progressive disease (PD).

Official Title
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A Phase 2, Multi-center, Single-arm Study of TJ202 Combined With Dexamethasone in Subjects With Relapsed or Refractory Multiple Myeloma Who Received at Least 2 Prior Lines of Treatment

Conditions
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Multiple Myeloma in Relapse, Refractory Multiple Myeloma

Intervention / Treatment
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* Drug: TJ202 and Dexamethasone


Participation Criteria
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Eligibility Criteria
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Inclusion criteria: Age ≥ 18, male or female; Subject must have had documented MM; At screening phase, subject must have measurable disease; Subject is in a state of progressive disease (PD); Subject must have life expectancy of no less than 6 months; Subject must have an ECOG (Eastern Cooperative Oncology Group) performance status score of 0 2; Exclusion criteria: Subject has received anti-CD38 monoclonal antibody treatment previously; Subject has received CAR-T cell therapy previously; Subject has previously received allogenic stem cell transplant, or subject has received autologous stem cell transplant within 3 months before administration of the study agent; Primary refractory multiple myeloma (subject failed to generate any minimal response or any degree of response to any therapy); Subject has received anti-myeloma treatment (radiotherapy is excluded) within 4 weeks or 5 PK half-lives of the treatment, whichever longer, before the first study agent administration.

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: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: TJ202<br> | Drug: TJ202 and Dexamethasone<br>* one dose of TJ202 16 mg/kg or an adjusted dose will be administered on Day 1 and Day 4 of Week 1, then every week from Week 2 to Week 12, then every 2 weeks from Week 13 to Week 24 and then every 4 weeks thereafter, until the subjects experience an onset of endpoint events like intolerance or PD. DEX 40 mg will be administered on Day 1 and Day 4 of Week 1, respectively and then 40mg weekly thereafter.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Overall response rate (ORR) | defined as the proportion of subjects achieving stringent complete response (sCR), complete response (CR), very good partial response (VGPR) and partial response (PR) | end of study [ Time Frame: Approximately up to 2 years ] | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Clinical benefit rate (CBR) |  | end of study [ Time Frame: Approximately up to 2 years ] | 
| Duration of response (DOR) |  | end of study [ Time Frame: Approximately up to 2 years ] | 
| Time to progression (TTP) |  | end of study [ Time Frame: Approximately up to 2 years ] | 
| Time to response (TTR) |  | end of study [ Time Frame: Approximately up to 2 years ] | 
| Progression-free survival (PFS) |  | end of study [ Time Frame: Approximately up to 2 years ] | 
| Overall survival (OS) |  | end of study [ Time Frame: Approximately up to 2 years ] |