Tislelizumab Combined With Chemotherapy Followed by Thoracic Consolidation Radiotherapy in the First-line Treatment of Extensive Stage Small Cell Lung Cancer

NCT07425795 | Recruiting Phase 2

• 1 other identifier: CZLS2025121-A
• Study Type: interventional
• Target: 36
• Locations: 1 country
• Sites: 1

Brief Summary

This study is a prospective, single arm, phase II clinical trial. We plan to include 36 newly diagnosed ES-SCLC patients who meet the inclusion criteria and receive induction therapy (tislelizumab+EP regimen, 4-6 cycles). After completing the induction therapy, efficacy evaluation will be conducted. Patients with remission will receive tislelizumab combined with consolidation chest radiotherapy (TRT) sequentially. After the consolidation therapy is completed, they will receive tislelizumab maintenance therapy until disease progression, intolerable toxicity, or withdrawal of informed consent occurs, whichever occurs first. The treatment duration will not exceed 2 years.

Conditions

Extensive Stage Small Cell Lung Cancer (ES-SCLC)

Keywords

Extensive stage small cell lung cancer; tislelizumab; thoracic consolidation radiotherapy; first-line treatment

Outcome Measures

Primary Outcomes (1)

• progression-free survival

  Progression free survival (PFS): defined as the period from enrollment to the date of the first recorded tumor progression (assessed according to RECIST v1.1 criteria, regardless of whether treatment is continued or not) or the date of death from any cause, whichever occurs first, assessed up to 24 months.

  From enrollment to the date of the first recorded tumor progression (assessed according to RECIST v1.1 criteria, regardless of whether treatment is continued or not) or the date of death from any cause, whichever occurs first, assessed up to 24 months.

Secondary Outcomes (4)

• Objective response rate

  The proportion of patients with BOR rated as CR or PR according to RECIST v1.1 criteria from the start of enrollment to progressive disease, assessed up to 24 months.

• Disease control rate

  The proportion of patients who, from enrollment to progressive disease, assessed up to 24 months

• Duration of remission

  From enrollment to the first recorded objective remission to recurrence or death for any reason, as determined by the researcher based on RECIST v1.1, whichever occurs first, assessed up to 24 months.

• Overall survival

  The time between enrollment and death from any cause, assessed up to 24 months.

Other Outcomes (1)

• the incidence of treatment-emergent adverse events

  Adverse event occurrence from enrollment to completion of patient treatment, assessed up to 24 months.

Study Arms (1)

Experimental group

EXPERIMENTAL

Drug: Tislelizumab Combined With Chemotherapy

Interventions

Tislelizumab Combined With Chemotherapy DRUG

Patients with newly diagnosed ES-SCLC receive induction therapy (tislelizumab+EP regimen, 4-6 cycles). After completing the induction therapy, efficacy evaluation is conducted. Those who experience remission are sequentially treated with tislelizumab combined with consolidation chest radiotherapy (TRT). After the consolidation therapy is completed, tislelizumab maintenance therapy is received until disease progression, intolerable toxicity, or withdrawal of informed consent occurs, whichever occurs first. The maximum duration of treatment is 2 years.

Also known as: thoracic consolidation radiotherapy

Experimental group

Eligibility Criteria

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

You may qualify if:

• Signed informed consent;
• Age 18-75 years;
• According to the judgment of the investigator, the patient was able to comply with the study protocol;
• Histologically or cytologically confirmed extensive stage small cell lung cancer (es-sclc) (according to the Veterans Administration lung cancer association \[valg\] staging system);
• No previous systemic treatment for ES-SCLC;
• With measurable lesions assessed by the investigator according to RECIST version 1.1;
• ECOG physical status score was 0 or 1;
• Life expectancy ≥ 3 months;
• Adequate hematology and end organ function, as defined by the following laboratory findings, which should be obtained within 14 days before the first study treatment: absolute neutrophil count (ANC) ≥ 1.5 × 10\^9/l (without granulocyte colony-stimulating factor treatment); Lymphocyte count ≥ 0.5 × 10\^9/l (500 / μ L); Platelet count ≥ 100 × 10\^9/l (100000 / μ L); Hemoglobin ≥ 90g/l (9.0g/dl); Aspartate aminotransferase (AST), alanine aminotransferase (ALT) and alkaline phosphatase (ALP) ≤ 2.5 × upper limit of normal (ULN), with the following exceptions: Patients with confirmed liver metastasis: AST and alt ≤ 5 × ULN; Patients with confirmed liver or bone metastasis: ALP ≤ 5 × ULN; Total bilirubin ≤ 1.5 × ULN, with the following exceptions: patients known to have Gilbert syndrome: total bilirubin ≤ 3 × ULN; Creatinine clearance ≥ 60ml/min (calculated by Cockcroft Gault formula); Albumin ≥ 25g/l (2.5g/dl).

You may not qualify if:

• Symptomatic, untreated, or actively progressive central nervous system (CNS) metastases; ·Patients with CNS lesions who were treated and asymptomatic were eligible for this study if they met all of the following criteria: measurable lesions that met the recistv1.1 definition were outside the CNS; The patient had no history of intracranial hemorrhage or spinal cord hemorrhage; Patients did not receive stereotactic radiotherapy within 7 days before the start of study treatment, whole brain radiotherapy within 14 days before the start of study treatment, or neurosurgical resection within 28 days before the start of study treatment; Patients do not need to continue to receive corticosteroids for CNS disease. Treatment with stable doses of anticonvulsants was allowed. Metastasis was limited to the cerebellum or supratentorial region (i.e., not to the midbrain, pons, medulla oblongata, or spinal cord); There was no evidence of progression between the completion of CNS local therapy and the initiation of study therapy asymptomatic patients with CNS metastases who could be enrolled according to the assessment of other investigators could be enrolled;
• History of leptomeningeal disease;
• Poorly controlled pleural effusion, pericardial effusion or ascites requiring repeated drainage (once a month or more frequently);
• Poorly controlled or symptomatic hypercalcemia (ionized calcium \>1.5mmol/l, calcium \>12mg/dl or corrected calcium \>uln);
• Have active or ever suffered from autoimmune disease or immunodeficiency;
• Have a history of idiopathic pulmonary fibrosis, organized pneumonia (such as bronchiolitis obliterans), drug-induced pneumonia or idiopathic pneumonia;
• Active pulmonary tuberculosis;
• Untreated chronic hepatitis B patients, chronic hepatitis B virus carriers with HBV DNA ≥ 500 iu/ml (2500 copies /ml), active hepatitis C patients: inactive HBsAg carriers, patients with stable active HBV infection after drug treatment (HBV dna\<500 iu/ml (2500 copies /ml)) can be enrolled. HBV DNA testing was only performed in patients who tested positive for hepatitis B core antibody (anti HBC antibody). Patients with negative hepatitis C virus (HCV) antibody test at screening, or patients with positive HCV antibody and negative HCV RNA test at screening can be enrolled in the study. HCV RNA testing will only be performed in patients with positive hepatitis C virus (HCV) antibody. Note: Patients with detectable hepatitis B surface antigen (HBsAg) or detectable HBV DNA should be treated according to treatment guidelines. Patients treated with antiviral drugs at the time of screening should have been treated for \>2 weeks before enrollment and continue to be treated for 6 months after termination of study drug treatment.

Sponsors & Collaborators

• Chongqing University Cancer Hospital: lead

Study Sites (1)

Chongqing University Affiliated Cancer Hospital

Chongqing, Chongqing Municipality, 400000, China

RECRUITING

Related Publications (1)

• Chen D, Zou B, Li B, Gao A, Huang W, Shao Q, Meng X, Zhang P, Tang X, Hu X, Zhang Y, Guo J, Zhao C, Yuan J, Li Q, Zhu C, Yu J, Wang L. Adebrelimab plus chemotherapy and sequential thoracic radiotherapy as first-line therapy for extensive-stage small-cell lung cancer (ES-SCLC): a phase II trial. EClinicalMedicine. 2024 Aug 21;75:102795. doi: 10.1016/j.eclinm.2024.102795. eCollection 2024 Sep.

  PMID: 39252865 RESULT

MeSH Terms

Interventions

Drug Therapy

Intervention Hierarchy (Ancestors)

Therapeutics

Central Study Contacts

Wei Zhou, Professor

CONTACT

86-13883465672; 1052308491@qq.com

Study Design

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

Study Record Dates

• First Submitted: September 8, 2025
• First Posted: February 23, 2026
• Study Start: October 10, 2025
• Primary Completion (Estimated): December 31, 2027
• Study Completion (Estimated): July 31, 2028
• Last Updated: February 23, 2026

Record last verified: 2026-02

Data Sharing

• IPD Sharing: Will not share

Locations

CN (1)