Xingbai Ji Formula Combined with Chemotherapy and Sintilimab in Metastatic Multi-Target Mutation-Negative Non-Small Cell Lung Cancer: a Clinical Trial

Randomized Clinical Trial on Xingbaiji Formula Combined with Chemotherapy and Sintilimab as First-Line Treatment for Recurrent/Metastatic Stage IIIB-IV EGFR/ALK/ROS-1 Mutation-Negative Non-Small Cell Lung Cancer Primary Objective: To evaluate efficacy by measuring Objective Response Rate (ORR) in patients receiving Xingbaiji Formula combined with chemotherapy and Sintilimab.

Secondary Objectives: To assess Progression-Free Survival (PFS), Quality of Life (QoL), immune-related biomarkers, safety, and adverse event rates.

Study Arms Control Group

Non-squamous NSCLC:

Sintilimab 200mg + Pemetrexed + Cisplatin/Carboplatin (IV, Q3W for 4 cycles). After induction, maintenance with Sintilimab 200mg Q3W (≤24 months) + Pemetrexed Q3W until disease progression, toxicity, or withdrawal.

Squamous NSCLC:

Sintilimab 200mg + Gemcitabine + Cisplatin/Carboplatin (IV, Q3W for 4-6 cycles). Maintenance with Sintilimab 200mg Q3W until progression or maximum 2 years.

Experimental Group

Control Regimen + Xingbaiji Formula:

Xingbaiji Granule 1 (10g/sachet): Dissolved in warm water, 1 sachet twice daily (morning/evening, post-meal).

Xingbaiji Granule 2 (5g/sachet): Dissolved in warm water, 1 sachet twice daily (morning/evening, post-meal).

Duration: Concurrent with chemotherapy for 6 months, then discontinued.

Inclusion criteria

• Signed written informed consent.
• Age: 18-75 years, regardless of gender.
• Histologically or cytologically confirmed non-small cell lung cancer (NSCCC), including adenocarcinoma, squamous cell carcinoma, or large cell carcinoma, with negative EGFR, ALK, and ROS-1 mutations confirmed by next-generation sequencing (NGS). Stage IIIB-IV NSCLC as per AJCC 8th edition staging criteria (required evaluations: neck contrast-enhanced CT or ultrasound, chest contrast-enhanced CT, abdominal contrast-enhanced CT or ultrasound, brain contrast-enhanced MRI, bone scan, or whole-body PET/CT).
• ECOG performance status ≤2 and life expectancy ≥3 months.
• Histologically or cytologically documented ineligibility for EGFR, ALK, or ROS-1 targeted therapies (written evidence required).
• At least one measurable lesion per RECIST v1.1. Lesions within prior radiation fields or post-local treatment may be selected if progression is confirmed.
• No prior systemic anti-tumor therapy for advanced disease. Adjuvant chemotherapy is permitted if ≥6 months have elapsed between recurrence and the last dose.

Exclusion criteria

• History of or concurrent other malignancies (excluding non-invasive tumors such as cured basal cell carcinoma of the skin, cervical carcinoma in situ, etc.);
• Individuals with allergic reactions to the Xingbaiji formula;
• Patients with mixed small cell lung cancer or those with a small cell lung cancer component;
• Severe mental illness or cognitive impairment that would impede compliance with study protocols or follow-up requirements;
• Pregnant or lactating women (a pregnancy test must be performed to exclude pregnancy; women of childbearing age must agree to use effective contraception during the study);
• Presence of any major illness or significant laboratory abnormalities that may interfere with receiving Xingbaiji formula, chemotherapy, or immunotherapy; 7Any other conditions deemed by the investigators to render participation in the trial inappropriate.