A Prospective, Single-Arm, Single-Center Phase II Study Evaluating the Efficacy and Safety of Chidamide Tablets Combined With PD-L1 Inhibitor, Carboplatin, and Etoposide as First-Line Treatment in Patients With Extensive-Stage Small-Cell Lung Cancer (ES-SCLC)
This is a Phase II, single-arm, single-center study evaluating Chidamide combined with a PD-L1 inhibitor, carboplatin, and etoposide as first-line therapy in extensive-stage small-cell lung cancer (ES-SCLC) patients. The primary objective is to assess Progression-Free Survival (PFS) per RECIST v1.1. Secondary objectives include Objective Response Rate (ORR), Disease Control Rate (DCR), Duration of Response (DOR), Overall Survival (OS), and safety. Approximately 36 participants will receive induction therapy (Chidamide + chemotherapy + PD-L1 inhibitor) for 4 cycles, followed by Chidamide maintenance until progression or unacceptable toxicity.
• Age ≥18 and ≤75 years.
• Histologically confirmed ES-SCLC, unsuitable for local radical therapy.
• No prior systemic therapy for ES-SCLC.
• ECOG performance status 0-1.
• At least one measurable lesion per RECIST v1.1.
• Expected survival ≥3 months.
• Adequate organ function (hematological, hepatic, renal, cardiac).
• Effective contraception from consent until 180 days after last dose.
• For active HBV infection: HBV DNA \<2000 IU/mL within 28 days before treatment and on stable antiviral therapy.
• Recovery from prior therapy toxicities to ≤ Grade 1 (except alopecia).
• Signed informed consent.