RecruitingPhase 2NCT07583550

Low-dose Thoracic Radiotherapy Followed by Adebrelimab Plus Chemotherapy, and Then Sequential Maintenance Therapy With Adebrelimab for Extensive-stage Small Cell Lung Cancer

Efficacy and Safety of Low-dose Thoracic Radiotherapy Followed by Adebrelimab Plus Chemotherapy and Sequential Adebrelimab Maintenance Therapy for Extensive-stage Small Cell Lung Cancer: A Prospective, Multicenter Phase II Study

Sponsor

Jiangmen Central Hospital

Enrollment

43 participants

Start Date

Jul 20, 2026

Study Type

INTERVENTIONAL

Conditions

Radiotherapy Lung

Summary

This study is a multicenter, prospective investigation aiming to evaluate the efficacy and safety of low-dose radiotherapy (15Gy/1.5 Gy bid × 10 fractions) combined with 4-6 cycles of systemic chemotherapy concurrently with Adebrelimab, followed by Adebrelimab maintenance therapy for up to two years, in subjects with extensive-stage small cell lung cancer (ES-SCLC). Additionally, immunohistochemical detection of the expression levels of four key transcriptional proteins-YAP1, NEUROD1, ASCL1, and POU2F3-will be performed to guide the molecular subtyping of SCLC. Based on these findings, we will explore the differential therapeutic outcomes of this regimen across distinct molecular subtypes (A/N/P/Y/I/AN/QN), with the goal of identifying the subject population most likely to benefit from this treatment modality, thereby optimizing clinical decision-making.

Eligibility

Min Age: 18 YearsMax Age: 75 Years

Plain Language Summary

Simplified for easier understanding

This clinical trial is studying a drug called Adebrelimab, a drug called Carboplatin, and others for people with lung and radiotherapy. The study is currently recruiting participants at 1 location. People eligible for this study include aged 18 Years to 75 Years.

This summary was AI-generated to explain the trial in plain language. It is not medical advice. Always discuss eligibility with your doctor before enrolling in a clinical trial.

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Interventions

DRUGEtoposide

Etoposide 100 mg/m² on days 1-3 plus cisplatin 25 mg/m² on days 1-3, every 3 weeks (q3w), or etoposide 100 mg/m² on days 1-3 plus carboplatin AUC 5 on day 1, every 3 weeks (q3w).

DRUGCisplatin

Etoposide (100 mg/m²) and cisplatin (25 mg/m²) were administered on days 1-3 of each 3-week cycle.

DRUGCarboplatin

Etoposide (100 mg/m²) was given on days 1-3 and carboplatin (AUC 5) on day 1 of each 3-week cycle.

DRUGAdebrelimab

20 mg/kg intravenously on day 1, repeated every 21 days (q3w). Administered concurrently with chemotherapy for 4-6 cycles, followed by maintenance monotherapy for up to 2 years.

RADIATIONThoracic Radiotherapy

All subjects will first receive low-dose radiotherapy (DT 15 Gy, 1.5 Gy per fraction × 10 fractions, BID). Within one week after radiotherapy completion, they will receive 4-6 cycles of systemic chemotherapy (EP or EC regimen) combined concurrently with adebrelimab. Following the 4-6 cycles of chemo-immunotherapy, adebrelimab maintenance therapy will be continued for two years.