Benmelstobart Plus Anlotinib, Chemotherapy and Thoracic Radiation for Limited-Stage Small Cell Lung Cancer

NCT07538258 | Not Yet Recruiting Phase 2

• 2 other identifiers: 2025LY12113MR-31-26-022322
• Study Type: interventional
• Target: 27
• Locations: 0 countries
• Sites: N/A

Brief Summary

This is a single-arm, single-center, exploratory clinical study conducted at Shanghai Pulmonary Hospital, Tongji University. The study evaluates the effectiveness and safety of first-line treatment with benmelstobart (an immunotherapy), anlotinib (an anti-angiogenic drug), platinum-etoposide chemotherapy, and concurrent thoracic radiotherapy in participants with previously untreated, unresectable limited-stage small cell lung cancer (LS-SCLC). Eligible participants are aged 18 to 75 years, with histologically or cytologically confirmed limited-stage SCLC (VALG staging), no prior systemic treatment for lung cancer, measurable lesions by RECIST 1.1, ECOG performance status 0-1, and adequate organ function. Participants receive 4 cycles of induction therapy (21 days per cycle), including benmelstobart intravenously every 3 weeks, anlotinib orally for 2 weeks on / 1 week off, and chemotherapy with carboplatin or cisplatin plus etoposide. Thoracic radiotherapy (60-70 Gy in 30-35 fractions) is given concurrently with chemotherapy cycles 1-3. After induction, participants receive maintenance therapy with benmelstobart plus anlotinib for up to 2 years or until disease progression or unacceptable side effects. The primary objective is to assess the Objective Response Rate (ORR) as evaluated by investigators using RECIST 1.1. Secondary objectives include progression-free survival (PFS), overall survival (OS), disease control rate (DCR), duration of response (DOR), and safety assessments of adverse events graded by CTCAE 5.0. A total of 27 participants will be enrolled. The study is expected to start in March 2026, complete enrollment by September 2027, and end in March 2029. All participants will be regularly followed for efficacy and safety.

Conditions

Limited-stage Small Cell Lung Cancer (LS-SCLC)

Keywords

Limited-stage small cell lung cancer; benmelstobart; anlotinib; chemotherapy

Outcome Measures

Primary Outcomes (1)

• Investigator-Assessed Objective Response Rate

  According to RECIST 1.1 criteria, investigator assesses target lesion changes via imaging; calculates the proportion of subjects achieving complete response (CR) or partial response (PR)

  Baseline at screening, after every 2 treatment cycles (each cycle is 21 days), end of treatment, up to disease progression, assessed up to approximately 24 months

Secondary Outcomes (11)

• Serious Adverse Event (SAE)

  from date of first study drug administration, follow-up until resolution or stabilization, assessed up to approximately 24 months

• 6-Month Progression-Free Survival Rate

  6-month time point after first treatment, follow-up cutoff

• Immune-Related Adverse Event (irAE)

  From date of first study drug administration through 90 days after the last dose of study drug; assessed at baseline, each cycle visit, and unscheduled visits for suspected irAEs; graded per CTCAE 5.0 and irAE-specific criteria.

• Progression-Free Survival (PFS)

  From date of first study drug administration until the date of first documented disease progression (per RECIST v1.1) or death from any cause, whichever occurs first; assessed up to 24 months (maximum follow-up period).

• 18-Month Overall Survival Rate

  18-month time point after first treatment, follow-up cutoff

Study Arms (1)

Benmelstobart combined with anlotinib and chemotherapy concurrent with thoracic radiotherapy

EXPERIMENTAL

Benmelstobart combined with anlotinib plus chemotherapy concurrent with thoracic radiotherapy for limited-stage small cell lung cancer. Benmelstobart Injection: 1200 mg/dose, Q21D (1 cycle), IV infusion. Anlotinib Hydrochloride Capsules: 12 mg/day, oral (2 weeks on/1 week off, repeated Q3W), taken with water at fixed time. Chemotherapy: Carboplatin: Day 1, AUC 5 mg/mL/min (max 750 mg), IV infusion; Cisplatin: Day 1, 75-80 mg/m², IV infusion; Etoposide: Days 1-3, 100 mg/m², IV infusion. Concurrent Thoracic Radiation: Initiated with Cycle 1 of chemotherapy; IMRT, 60-70 Gy in 30-35 fractions (1.8-2.0 Gy/fraction, once daily); target volumes: primary tumor + lymph nodes delineated on post-chemotherapy CT, investigator-adjusted individually.

Drug: Benmelstobart; Drug: Anlotinib; Drug: Cisplatin or carboplatin; Drug: Etoposide; Radiation: Thoracic Radiation Therapy

Interventions

Anlotinib DRUG

Small molecule multi-target anti-angiogenic agent.12 mg/day, oral (2 weeks on/1 week off, repeated Q3W), taken with water at fixed time.

Also known as: AL3818

Benmelstobart combined with anlotinib and chemotherapy concurrent with thoracic radiotherapy

Etoposide DRUG

Chemotherapy agent. Days 1-3, 100 mg/m², IV infusion.

Benmelstobart combined with anlotinib and chemotherapy concurrent with thoracic radiotherapy

Benmelstobart DRUG

Anti-PD-L1 monoclonal antibody, immunotherapy.1200 mg/dose, Q21D (1 cycle), IV infusion.

Also known as: TQB2450, Andewei

Benmelstobart combined with anlotinib and chemotherapy concurrent with thoracic radiotherapy

Thoracic Radiation Therapy RADIATION

External beam intensity-modulated radiotherapy (IMRT) targeting the primary thoracic tumor, ipsilateral hilum, and mediastinal lymph node stations (per LS-SCLC staging guidelines). Initiated with Cycle 1 of chemotherapy; IMRT, 60-70 Gy in 30-35 fractions (1.8-2.0 Gy/fraction, once daily); target volumes: primary tumor + lymph nodes delineated on post-chemotherapy CT, investigator-adjusted individually.

Benmelstobart combined with anlotinib and chemotherapy concurrent with thoracic radiotherapy

Cisplatin or carboplatin DRUG

Chemotherapy agent.Carboplatin: Day 1, AUC 5 mg/mL/min (max 750 mg), IV infusion; Cisplatin: Day 1, 75-80 mg/m², IV infusion.

Benmelstobart combined with anlotinib and chemotherapy concurrent with thoracic radiotherapy

Eligibility Criteria

• Age: 18 Years - 75 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• : Histologically or cytologically confirmed inoperable limited-stage small cell lung cancer (LS-SCLC) (per VALG staging).
• : No prior systemic therapy for limited-stage small cell lung cancer
• : Presence of measurable lesions as defined by RECIST 1.1. A previously irradiated lesion may be considered measurable only if it has demonstrated clear progression after radiotherapy and is not the sole lesion
• : Age ≥ 18 and ≤ 75 years
• : ECOG performance status: 0-1
• : Expected survival ≥ 3 months
• : Adequate hematologic and organ function, defined as meeting the following criteria: a) Hematologic function (no transfusion of blood or blood products, no G-CSF or other hematopoietic growth factors within 14 days): i. Absolute neutrophil count (ANC) ≥ 1.5 × 10⁹/L (1,500/mm³); ii. Platelet count (PLT) ≥ 100 × 10⁹/L (100,000/mm³); iii. Hemoglobin (HB) ≥ 80 g/L. b) Renal function: i. Calculated creatinine clearance (CrCl) ≥ 50 mL/min; ii. Urine protein \< 2+ or 24-hour urine protein quantification \< 1.0 g. c) Hepatic function: i. Serum total bilirubin (TBil) ≤ 1.5 × ULN; ii. AST and ALT ≤ 2.5 × ULN; iii. Serum albumin (ALB) ≥ 28 g/L. d) Coagulation function: i. International normalized ratio (INR) and activated partial thromboplastin time (APTT) ≤ 1.5 × ULN. e) Cardiac function: i. Left ventricular ejection fraction (LVEF) ≥ 50%.
• : Subjects voluntarily participate in this study, provide written informed consent, demonstrate good compliance, and agree to comply with follow-up procedures.

You may not qualify if:

• : Prior use of anti-angiogenic agents such as anlotinib, apatinib, bevacizumab, or related immunotherapeutic agents targeting PD-1, PD-L1, etc
• : Presence of multiple factors affecting oral medication absorption (e.g., inability to swallow, status post gastrointestinal resection, chronic diarrhea, intestinal obstruction, etc.).
• : Uncontrolled pleural effusion, pericardial effusion, or ascites requiring repeated drainage.
• : Patients with imaging evidence of tumor invasion adjacent to major blood vessels, or judged by the investigator to have a high risk of fatal massive hemorrhage due to tumor invasion of major blood vessels during the subsequent study period.
• : History of severe bleeding tendency or coagulopathy, including but not limited to: clinically significant hemoptysis (more than one tablespoon per day) within 3 months prior to enrollment; or clinically significant bleeding symptoms or bleeding diathesis within 4 weeks prior to randomization, such as gastrointestinal bleeding, hemorrhagic gastric ulcer (including gastrointestinal perforation and/or fistula; however, patients with surgically repaired gastrointestinal perforation or fistula may be eligible), unhealed wounds, ulcers, or fractures, etc.
• : Undergoing major surgical treatment, incisional biopsy, or significant traumatic injury within 28 days prior to randomization.
• : History of arterial/venous thrombotic events within 6 months prior to randomization, such as cerebrovascular accident (including transient ischemic attack), deep vein thrombosis, and pulmonary embolism.
• : Development of active autoimmune disease requiring systemic therapy (e.g., disease-modifying agents, corticosteroids, or immunosuppressants) within 2 years prior to the first dose.
• : Any other conditions that, in the judgment of the investigator, would render the patient ineligible for study enrollment.

Sponsors & Collaborators

• Yayi He: lead

MeSH Terms

Conditions

Small Cell Lung Carcinoma

Interventions

anlotinib; Cisplatin; Carboplatin; Etoposide

Condition Hierarchy (Ancestors)

Carcinoma, Bronchogenic; Bronchial Neoplasms; Lung Neoplasms; Respiratory Tract Neoplasms; Thoracic Neoplasms; Neoplasms by Site; Neoplasms; Lung Diseases; Respiratory Tract Diseases

Intervention Hierarchy (Ancestors)

Chlorine Compounds; Inorganic Chemicals; Nitrogen Compounds; Platinum Compounds; Coordination Complexes; Organic Chemicals; Podophyllotoxin; Tetrahydronaphthalenes; Naphthalenes; Polycyclic Aromatic Hydrocarbons; Hydrocarbons, Aromatic; Hydrocarbons, Cyclic; Hydrocarbons; Polycyclic Compounds; Glucosides; Glycosides; Carbohydrates

Central Study Contacts

Yayi He, MD

CONTACT

021-65115006-2393; yayi.he@tongji.edu.cn

Study Design

• Study Type: interventional
• Phase: phase 2
• Allocation: NA
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: SINGLE GROUP
• Sponsor Type: OTHER
• Responsible Party: SPONSOR INVESTIGATOR
• PI Title: Professor

Study Record Dates

• First Submitted: March 27, 2026
• First Posted: April 20, 2026
• Study Start: April 20, 2026
• Primary Completion (Estimated): September 30, 2027
• Study Completion (Estimated): March 31, 2029
• Last Updated: April 20, 2026

Record last verified: 2026-03