Single-arm, Prospective Clinical Study of PD-L1 Inhibitor Combined With Apatinib as First-line Maintenance Treatment for Extensive-stage Small Cell Lung Cancer
This is a prospective, single-arm clinical study designed to evaluate the 6-month progression-free survival rate (6-month PFS rate) of a PD-L1 inhibitor combined with apatinib as first-line maintenance treatment for extensive-stage small cell lung cancer (ES-SCLC). The study plans to recruit 40 patients. After receiving 4-6 cycles of induction therapy, patients whose efficacy is evaluated as CR, PR or SD (according to RECIST 1.1) will enter maintenance therapy with PD-L1 inhibitor + apatinib 250 mg po qd. , the selection of PD-L1 inhibitors in the maintenance phase is consistent with the first-line standard treatment in the induction phase. Efficacy was assessed using RECISIT 1.1, with imaging evaluations every 6 weeks (±7 days) for 48 weeks after the first dose and every 9 weeks (±7 days) after week 48, regardless of treatment delays or interruptions, until Disease progression or study termination, whichever occurs first. The primary efficacy endpoint of this study is 6-month PFS rate, and secondary efficacy endpoints include median PFS, median OS and safety.
• Aged 18-75 years old, both men and women are welcome;
• Extensive-stage small cell lung cancer confirmed by histology or cytology (staging according to the American Veterans Lung Cancer Association, VALG);
• Patients whose induction therapy must receive the first-line standard treatment regimen of PD-L1 monoclonal antibody combined with chemotherapy, and whose efficacy evaluation is CR, PR or SD (according to RECIST 1.1); patients who have previously undergone surgical treatment and receive curative adjuvant therapy such as radiotherapy , chemotherapy patients, there is a treatment-free interval of at least 6 months from the last chemotherapy, radiotherapy or chemoradiotherapy to the diagnosis of extensive-stage SCLC;
• Expected survival time ≥12 weeks;
• ECOG physical status score 0\
∙ 1 points;
• Before the first dose of study drug, laboratory test values must meet the following conditions:
‣ Blood routine (no blood transfusion or correction with hematopoietic stimulating factor drugs within 14 days before screening): WBC ≥3.0 × 109/L; ANC ≥1.5 × 109/L; PLT ≥100 × 109/L; HGB ≥90 g/L;
⁃ Liver function: AST ≤2.5 × ULN in subjects without liver metastasis; ALT ≤2.5 × ULN; ALT and AST in subjects with liver metastasis ≤5 × ULN; TBIL ≤1.5 × ULN;
⁃ Renal function: serum Cr ≤1.5 × ULN or CrCl ≥50 mL/min (using Cockcroft/Gault formula);
⁃ Coagulation function: INR ≤1.5 × ULN, APTT ≤1.5 × ULN (only applicable to patients who are not currently receiving anticoagulation therapy);
• Women of childbearing age must have a serum pregnancy test within 7 days before taking the drug for the first time, and the result is negative. Female subjects of childbearing age and male subjects whose partners are women of childbearing age must agree to use contraception within 24 weeks from signing the informed consent form to the last administration of the study drug;
• The subjects voluntarily joined this study, signed the informed consent form, had good compliance, and cooperated with the follow-up.