Camrelizumab for Patients With Recurrent Primary Central Nervous System Lymphoma (PCNSL)

Study Overview
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Brief Summary
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This study is intend to improve the objective response rate in treatment of camrelizumab in recurrent primary central nervous system lymphoma patients.

Detailed Description
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Primary CNS lymphoma (PCNSL) is a rare B-cell variant of non-Hodgkin lymphoma that is confined to the brain, leptomeninges, spinal cord, and eyes. The optimum treatment for patients with recurrent PCNSL remains challenging and at present there is no universally accepted therapeutic approach . The purpose of this study is to evaluate the efficacy and safety of camrelizumab [a programmed cell death 1 (PD-1) inhibitor] for recurrent patients with primary CNS lymphoma.

Official Title
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An Exploratory Study on Camrelizumab（SHR-1210）for Recurrent Primary Central Nervous System Lymphoma (PCNSL)

Conditions
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Primary Central Nervous System Lymphoma

Intervention / Treatment
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* Drug: Camrelizumab


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: The initial diagnosis was primary diffuse large B-cell lymphoma of the central nervous system confirmed by histopathology; Prior to first-line treatment based on methotrexate (with or without radiotherapy), tumor recurrence was confirmed by MRI; Measurable focus in MRI (>10x10mm); Aged > 18 years; Life expectancy of at least 12 weeks; The patient has a Karnofsky performance status of at least 50%; Main organs function normally, without serious blood, heart, lung, liver, kidney and immune deficiency diseases. Specific assay indicators requirements： White blood cells>3.0×10^9/L;platelet>80×10^9/L;hemoglobin>10g/dL;serum bilirubin ≤ 1.5×ULN;ALT and AST ≤ 2×ULN;serum creatinine≤1.5mg/dL; Female subjects of childbearing age must exclude pregnancy and are willing to use a medically approved high-efficiency contraceptive (eg, IUD, contraceptive or condom) during the study period and within 3 months of the last study drug administration; The subject should be aware of the purpose of the study and the operations required by the study and volunteer to participate in the study before sign the informed consent form; Exclusion Criteria: Concurrent administration of any other antitumor therapy； Allergic to the ingredients of research drugs； Has received prior therapy with an anti-PD-1, anti-PD-L1, or anti-PD-L2 agent； Any active autoimmune diseases or a history of autoimmune diseases (including but not limited to: autoimmune hepatitis, interstitial pneumonia, uveitis, enteritis, hepatitis, pituitary inflammation, vasculitis, nephritis, hyperthyroidism, decreased thyroid function； Systemic steroid therapy or any other form of immunosuppressive therapy within 7 days prior to the first dose of trial treatment, except for a maximum dose of 4 mg/day dexamethasone or equivalent doses of other corticosteroids or control of brain edema, which has been stable or decreased for at least 1 week prior to inclusion; Active infection; Risk of bleeding; HIV positivity; Pregnancy and lactation;

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: Camrelizumab<br>Camrelizumab(SHR-1210) 200mg, once every 2 weeks, each 4 weeks is 1cycle. | Drug: Camrelizumab<br>* Camrelizumab(SHR-1210) 200mg, once every 2 weeks, each 4 weeks is 1cycle.<br>* Other names: SHR-1210;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| ORR(objective response rate) | the proportion of patients with tumor size reduction of a predefined amount and for a minimum time period | Up to three years | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The best therapeutic response of CR(complete response)、PR(partial response)、SD(stable response) and PD(progressive disease) | Describe the best therapeutic response of patients treated with Camrelizumab | Up to three years | 
| PFS(progression free survival) | the time from randomization until objective tumor progression or death | Up to three years | 
| OS(overall survival) | the time from randomization until death from any cause and is measured in the intent-to-treat population | Up to three years | 
| ADEs( adverse events) | Adverse events at each visit with the NCI CTCAE v5.0 used as a guide for the grading of severity. | Up to three years | 
| KPS(Karnofsky Performance Status) | Duration of stabilization/improvement of Karnofsky Performance Status | Up to three years |