Pamiparib for Consolidation Treatment of Unprogressed LS-SCLC After Concurrent Chemoradiotherapy

Study Overview
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Brief Summary
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This study is a prospective, single-arm, phase II clinical trial, with 1-year PFS as the endpoint, to evaluate the efficacy and associated toxicity of Pamiparib as single-agent consolidation treatment in patients with limited-stage small cell lung cancer(LS-SCLC) patients who have not progressed following platinum-based concurrent chemoradiotherapy(cCRT) .

Official Title
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A Prospective, Phase II, Single-arm Study Evaluating the Efficacy and Safety of Pamiparib in Consolidation Therapy for Limited-stage Small Cell Lung Cancer That Has Not Progressed After Concurrent Chemoradiotherapy

Conditions
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Limited Stage Small Cell Lung Cancer

Intervention / Treatment
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* Drug: Pamiparib


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: The patient or a legally authorized representative must provide study-specific informed consent prior to study entry, had good compliance and cooperated with the follow-up. Age at least 18 years Pathologically (histologically or cytologically) proven diagnosis of limited stage small cell lung cancer (Stage Tx, T1-T4, N0-3, M0, American Joint Committee on Cancer [AJCC] staging, 8th edition [Ed.]), within 60 days prior to registration Patients must have had measurable disease (per Response Evaluation Criteria in Solid Tumors [RECIST], version 1.1) prior to the required cycle of cCRT Patients must be free of disease progression and not be able to receive other antitumor therapy within 6 weeks of completion of cCRT Patients must submit archived or freshly biopsied tumor tissue (formalin-fixed, paraffin-embedded tissue block or approximately 15 unstained sections [must have >8 sections]) along with the relevant pathology report. Eastern Cooperative Oncology Group (ECOG) performance status of 0-2 within 30 days prior to registration Patient life expectancy must be >12 weeks Exclusion Criteria: Mixed SCLC or NSCLC confirmed by histology Previous tumor resection for LS-SCLC Any patient treatable by surgery or stereotactic body radiation therapy/stereotactic ablative radiation therapy should be excluded Expected to receive any other form of anti-tumor therapy during the study period Previous treatment with PARP inhibitor drugs Any active malignancy within 2 years prior to enrollment, excluding the specific cancers being studied in this study and locally recurrent cancers that have been cured (eg, resected basal or squamous cell skin cancer, superficial bladder cancer, cervical cancer carcinoma in situ or carcinoma in situ of the breast) Women who are pregnant, breastfeeding, or planning to become pregnant during the study Concurrent participation in another therapeutic clinical trial

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: Pamiparib monoagent<br>Drug: Pamiparib 40mg bid orally | Drug: Pamiparib<br>* Patients will receive Pamiparib 40 mg bid every 3 weeks after cCRT up to 1 year or disease progression according to RECIST v1.1 occur.<br>* Other names: BGB-290;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| 1-year Progression Free Survival Rate | One-year PFS rate was define as the percentage of patients who did not experience disease progression as defined by response evaluation criteria in solid tumors (RECIST) v1.1 or death due to any cause within 1 year from the date cCRT treatment ended. | One year after the start of intervention | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Progression Free Survival | Progression-free survival according to RECIST v1.1 from date of cCRT treatment ended until the date of first documented progression or date of death from any cause, whichever came first, assessed up to 24 months. For patients whose disease did not progress, PFS was evaluated by censoring patients at their most recent imaging. | Two years | 
| Overall Survival | Overall survival from date of cCRT treatment ended until the date of end of treatment visit or date of death from any cause, whichever came first, assessed up to 24 months. Participants still alive at the time of data analysis will be censored at the date of last follow-up. | Two years | 
| AEs/SAEs | The level of AEs defined by NCI-CTCAE v5.0. Safety assessments will be assessed and documented after initiation of study drug, regardless of relationship to study drug. | Baseline up to 30 days after the last dose of study drug or before initiation of a new antitumor treatment, whichever occurred first |