NCT05477264

Concurrent Tislelizumab and Radiotherapy in Newly Diagnosed Extranodal NK/T-cell Lymphoma, Nasal Type

Phase II Study of Concurrent Tislelizumab and Radiotherapy for Treatment-naïve, Newly Diagnosed Low-risk Extranodal NK/T-cell Lymphoma, Nasal Type

• Status: Recruiting
• Phase: Phase 2
• Study type: Interventional
• Enrollment: 38 (estimated)
• Sponsor: Won Seog Kim · Academic / Other
• Sex: All
• Age: 19 Years
• Healthy volunteers: Not accepted

Summary

This clinical trial intends to analyze the efficacy of PD-1 inhibitor combined with radiotherapy for newly diagnosed NK/T-cell lymphoma. The investigational product in this clinical trial is tislelizumab, a PD-1 inhibitor. As a rationale for using PD-1 inhibitors in patients with NK/T-cell lymphoma, their efficacy has been proved several times mostly in patients with relapsed NK/T-cell lymphoma. Patients with low-stage NK/T-cell lymphoma usually receive high-concentration cytotoxic chemotherapy combined with radiotherapy, with treatment response rates of approximately 60 to 80%, but 80-90% of them experience hematological and non-hematologic toxicities during treatment. Therefore, this study intends to determine the efficacy and safety of PD-1 inhibitor(Tislelizumab) combined with radiotherapy as a first-line therapy compared with pre-existing cytotoxic chemotherapy combined with radiotherapy in patients with NK/T-cell lymphoma with low stage and International Prognostic Index.

Detailed description

This clinical trial intends to analyze the efficacy of PD-1 inhibitor combined with radiotherapy for newly diagnosed NK/T-cell lymphoma. The investigational product in this clinical trial is tislelizumab, a PD-1 inhibitor. As a rationale for using PD-1 inhibitors in patients with NK/T-cell lymphoma, their efficacy has been proved several times mostly in patients with relapsed NK/T-cell lymphoma. However, a tumor-immune microenvironment(TIME) analysis at our institution confirmed that patients with relapsed or refractory NK/T-cell lymphoma had a peritumoral microenvironment with suppressed activity of T cells and macrophages (immune suppression, IS), in which case the efficacy of PD-1 inhibitor decreased compared to a more immune-active microenvironment (immune evasion or immune tolerance, IE or IT). On the other hand, most patients who were newly diagnosed with NK/T-cell lymphoma had a peritumoral microenvironment with active T cells and macrophages(IE or IT). Patients with low-stage(Stage IE or IIE) NK/T-cell lymphoma usually receive high-concentration cytotoxic chemotherapy combined with radiotherapy, with treatment response rates of approximately 60 to 80%, but 80-90% of them experience grade 3 or 4 hematological and non-hematologic toxicities during treatment. Therefore, based on the tumor microenvironment of NK/T-cell lymphoma, this study intends to determine the efficacy and safety of PD-1 inhibitor(Tislelizumab) combined with radiotherapy as a first-line therapy compared with pre-existing cytotoxic chemotherapy combined with radiotherapy in patients with NK/T-cell lymphoma with low stage and International Prognostic Index.

Conditions

• Lymphoma

Interventions

Type	Name	Description
DRUG	Tislelizumab	Induction therapy: Tislelizumab combined with radiation * Tislelizumab: 200mg, IV at 3-week intervals combined with radiotherapy. * Radiotherapy: 400Gy/20 fractions Maintenance therapy(after termination of combination therapy) * Tislelizumab: 200mg IV at 3-week intervals for up to 2 years until disease progression or intolerance.

Timeline

• Start date: 2023-03-02
• Primary completion: 2026-12-31
• Completion: 2026-12-31
• First posted: 2022-07-28
• Last updated: 2024-04-03

Locations

1 site across 1 country: South Korea