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Chemo-immunotherapy Plus Thoracic Radiotherapy in Extensive Stage Small-cell Lung Cancer

Randomized Phase III Trial Investigating the Survival Benefit of Adding Thoracic Radiotherapy to Durvalumab (MEDI4736) Immunotherapy Plus Chemotherapy in Extensive Stage Small-cell Lung Cancer

Status
Terminated
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05223647
Acronym
TRIPLEX
Enrollment
239
Registered
2022-02-04
Start date
2022-01-11
Completion date
2025-09-04
Last updated
2026-01-28

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Small-cell Lung Cancer

Keywords

cancer, chemotherapy, radiotherapy, immunotherapy

Brief summary

Studies have shown that combining chemotherapy and immune checkpoint inhibitors (ICI) prolongs survival compared with chemotherapy alone in extensive stage small-cell lung cancer (ES SCLC), but the survival benefit is modest. The main aim of this trial is to investigate whether there is a synergistic/additive effect of concurrent thoracic radiotherapy in ES SCLC patients receiving carboplatin/etoposide/durvalumab.

Detailed description

Studies show that adding ICI therapy to standard chemotherapy prolongs survival in ES SCLC. The survival benefit, however, is modest, and there is a need for more effective therapy. It has been hypothesized that there is a synergistic effect of combining ICI with radiotherapy. In this randomized phase III study, the main aim is to investigate whether concurrent thoracic radiotherapy of 30 Gy/10 fractions improves survival in ES SCLC patients receiving carboplatin/etoposide/durvalumab. It is currently not possible to classify the patients who benefit from ICIs in SCLC. In this study, biological material (tissue, blood, feces) which will be analyzed for potential predictive and prognostic biomarkers. Prophylactic cranial irradiation in ES SCLC is debated, mainly due to the potentially detrimental effect on cognition. Thus, frequency and timing of brain metastases and cognitive function will be assessed before, during and after study treatment.

Interventions

PROCEDUREThoracic radiotherapy

30Gy/10 fractions thoracic radiotherapy given between 2nd and 3rd course of chemo-immunotherapy.

Four courses of carboplatin/etoposide/durvalumab every 3 weeks followed by durvalumab every 4 weeks until intolerable toxicity, progressive disease leading to a need for other treatment, or until the patient no longer wishes to continue treatment.

Sponsors

Norwegian University of Science and Technology
Lead SponsorOTHER
St. Olavs Hospital
CollaboratorOTHER
Haukeland University Hospital
CollaboratorOTHER
University Hospital of North Norway
CollaboratorOTHER
Alesund Hospital
CollaboratorOTHER
Helse Stavanger HF
CollaboratorOTHER_GOV
Oslo University Hospital
CollaboratorOTHER
Helse Nord-Trøndelag HF
CollaboratorOTHER
Helse Fonna
CollaboratorOTHER
Drammen sykehus
CollaboratorOTHER
University Hospital, Akershus
CollaboratorOTHER
Erasmus Medical Center
CollaboratorOTHER
Sahlgrenska University Hospital
CollaboratorOTHER
Karolinska University Hospital
CollaboratorOTHER
Gävle Hospital
CollaboratorOTHER
Sykehuset Innlandet HF
CollaboratorOTHER
North Estonia Medical Centre
CollaboratorOTHER
Nordlandssykehuset HF
CollaboratorOTHER
Landspitali University Hospital
CollaboratorOTHER
Lund University Hospital
CollaboratorOTHER
University Hospital, Linkoeping
CollaboratorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

1. Age \> 18 years at time of study entry 2. ECOG performance status of 0 or 1 3. Body weight \>30 kg 4. Adequate bone marrow, liver and kidney function 5. Life expectancy of at least 3 months 6. At least one measurable (RECIST 1.1), thoracic lesion that can be irradiated with 30 Gy/10 fractions 7. Histologically or cytologically confirmed SCLC 8. Stage III-IV disease (TNM v8) 9. FEV1 \>1 L or \>30 % of predicted value and DLCO \>30 % of predicted value 10. Patients with brain metastases are eligible provided they are asymptomatic or treated and stable on steroids and/or anticonvulsants prior to the start of treatment

Exclusion criteria

1. Previous chemo-, immuno- or radiotherapy for SCLC 2. Major surgical procedure last 28 days 3. History of allogenic organ transplantation, autoimmune disease, immunodeficiency, hepatitis or HIV 4. Uncontrolled intercurrent illness 5. Other active malignancy 6. Leptomeningeal carcinomatosis 7. Immunosuppressive medication 8. Pregnant or breastfeeding women

Design outcomes

Primary

MeasureTime frameDescription
Change in 1-year overall survival14 months after last patient entryThe Cox proportional hazards method will be used to compare survival between the treatment groups.

Secondary

MeasureTime frameDescription
Change in 2-, 3-, 4- and 5-year survival rate2, 3, 4 and 5 years after last patient entryThe Cox proportional hazards method will be used to compare survival between the treatment groups.
Frequency and severity of adverse eventsThrough study completion, an average of 1 year after last patient entryAdverse events will be compared between the treatment arms using the Pearson's Chi-square and Fisher's exact test.
Change in progression free survival (PFS)Through study completion, an average of 1 year after last patient entryPFS will be estimated using the Kaplan-Meier method and compared using the log-rank test. A Cox-model adjusting for baseline characteristics will be used for multivariable analyses.
Change in overall response ratesThrough study completion, an average of 1 year after last patient entryResponse rates are compared using Pearson's Chi-square test.
Change in response rates in non-irradiated lesionsThrough study completion, an average of 1 year after last patient entryResponse rates are compared using Pearson's Chi-square test.
Local control rates in the thoraxThrough study completion, an average of 1 year after last patient entryLocal control rates are compared using Pearson's Chi-square test.
Health-related quality of life (HRQoL)Through study completion, an average of 1 year after last patient entryAll HRQoL scores will be transformed to a scale of 0-100 according to the EORTC QLQ scoring manual. Mean scores will be compared at each assessment timepoint, and a difference of 10 points is considered clinically relevant.

Countries

Estonia, Iceland, Netherlands, Norway, Sweden

Contacts

STUDY_DIRECTORMagnus Steigedal, PhD

Department of Clinical and Molecular Medicine, NTNU

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026