NCT07413042

A Phase I Study to Evaluate the Safety and Preliminary Efficacy of [225Ac]Ac-DOTATATE Injection Combined With Tislelizumab in the Maintenance Treatment Period for Patients of Extensive-stage Small Cell Lung Cancer (ES-SCLC) With Somatostatin Receptors (SSTR)+ as First-line Treatment

• Status: Recruiting
• Phase: Phase 1
• Study type: Interventional
• Enrollment: 24 (estimated)
• Sponsor: Peking University Cancer Hospital & Institute · Academic / Other
• Sex: All
• Age: 18 Years – 80 Years
• Healthy volunteers: Not accepted

Summary

This is a phase I study to evaluate the safety and preliminary efficacy of \[225Ac\]Ac-DOTATATE injection combined with tislelizumab in the maintenance treatment period for patients of extensive-stage small cell lung cancer (ES-SCLC) with somatostatin receptors (SSTR)+ as first-line treatment.Patients with ES-SCLC who have completed the induction therapy of first-line standard treatment and are yet to enter the maintenance treatment period are planned to be enrolled.

Conditions

• SCLC, Extensive Stage

Interventions

Type	Name	Description
DRUG	[225Ac]Ac-DOTATATE	During the dose escalation phase, the "3+3" dose escalation method was adopted. There were two dose groups: the single-dose administration dose of the first dose group was 90 kBq/kg, and that of the second dose group was 120 kBq/kg.During the dose expansion phase, the subjects received the RP2D dose of the \[225Ac\]Ac-DOTATATE injection. The administration method, combination therapy, etc. were all the same as those in the dose escalation phase.

Timeline

• Start date: 2026-01-20
• Primary completion: 2026-12-31
• Completion: 2028-06-30
• First posted: 2026-02-17
• Last updated: 2026-02-17

Locations

1 site across 1 country: China