Anti-PD-1 Re-challenge After Immune Priming by Ipilimumab and Immune Boosting by Radiotherapy in Advanced NSCLC (RAD-IO)

Still many advanced non-small cell lung cancer (NSCLC) patients do not benefit from PD-(L)1 inhibition or will eventually develop progression through secondary resistance. Inhibition of CTLA-4, application of radiotherapy together with PD-1 inhibition showed synergistic effects and is deemed safe.

Study Overview

• Status: Active, not recruiting
• Conditions: Carcinoma, Non-Small-Cell Lung
• Intervention / Treatment: Drug: Ipilimumab; Drug: Cemiplimab; Radiation: SBRT

Detailed Description

Still many advanced non-small cell lung cancer (NSCLC) patients do not benefit from PD-(L)1 inhibition or will eventually develop progression through secondary resistance. The aim of this study is to investigate whether the combining of T cell priming by CTLA-4 inhibition (ipilimumab) ad subsequent immune boosting by stereotactic body radiotherapy (SBRT) on 1-4 tumor lesions can re-invigorate the response on PD-1 inhibition (cemiplimab) after initial non-response or secondary resistance to anti-PD-(L)1 treatment. Elaborate translational research by repeat biopsies in combination with blood collection during the different stages of treatment will help improve understanding of the joint effort of these different interventions.

• Study Type: Interventional
• Enrollment (Estimated): 54
• Phase: Phase 2

Contacts and Locations

Study Locations

• Netherlands
  • North Holland
    • Amsterdam, North Holland, Netherlands, 1066 CX
      • Antoni van Leeuwenhoek - Netherlands Cancer Institute

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

1. Have proven diagnosis of recurrent advanced NSCLC, irrespective of histological subtype.
2. Be willing and able to provide written informed consent/assent for the trial.
3. Must still have measurable disease based on RECIST 1.1 after application of study SBRT. Lesions that were irradiated prior to the study, but have progressed since irradiation but prior to study inclusion will be allowed as measurable disease.
4. Must provide newly obtained tissue from a core or excisional biopsy of a tumor lesion and are willing to have a second biopsy performed from any non-irradiated lesion after the radiation and immune-modulating treatment. This lesion may be used for RECIST measurements.
5. Have a performance status of 0 or 1 on the ECOG Performance Scale.
6. Stage IV NSCLC treated with at least PD-(L)1 blockade. There is no maximum number of previous lines of systemic treatment. Patients with both primary or acquired resistance to PD-(L)1 inhibition may be considered eligible. However, in the 1st stage ≥4 of 12 patients, in the 2nd stage a total of ≥8 of 25 patients and in the 3rd stage a total of ≥27 of 54 patients need to fulfill the definition of acquired resistance. Also, a maximum of 27 patients with a PD-L1 negative tumor will be included.
7. Have at least 2 separate (metastatic) lesions of which one is eligible for irradiation and another for biopsy and RECIST tumor evaluation.
8. Demonstrate adequate organ function. All screening labs should be performed within 14 days of treatment initiation.
9. Female subject of childbearing potential should have a negative serum pregnancy test within 72 hours prior to receiving the 1st dose of study medication. If the urine test is positive or cannot be confirmed as negative, a serum pregnancy test will be required.
10. Female subjects of childbearing potential should be willing to use 2 methods of birth control or be surgically sterile, or abstain from heterosexual activity for the course of the study through 6 months after the last dose of study medication. Subjects of childbearing potential are those who have not been surgically sterilized or have not been free from menses for > 1 year.
11. Male subjects should agree to use an adequate method of contraception starting with the 1st dose of study therapy through 6 months after the last dose of study therapy

Exclusion Criteria:

The subject must be excluded from participating in the trial if the subject:

1. Has a non-smoking-related targetable driver mutation, e.g. EGFR, ALK, RET or ROS1. Patients with advanced NSCLC with a smoking-related targetable driver mutation, e.g. KRAS or BRAF, may be found eligible if they have a history of ≥10 PY, but only when all options for targeted therapy have been exhausted and when progression on previous PD-(L)1 blockade has occurred.
2. Is currently participating in or has participated in a study of an investigational agent or using an investigational device within 4 weeks of the 1st dose of treatment.

3. Has not recovered (i.e. ≤ Grade 1 or at baseline) from adverse events due to a previously administered agent.

   • Note: Subjects with ≤ Grade 2 neuropathy are an exception to this criterion and may qualify for the study.
   • Note: Patients who experienced significant autoimmune side effects related to previous PD-(L)1 checkpoint inhibition, i.e. requiring use of steroids or other anti-inflammatory drugs and/or the need to (temporarily) withhold PD-(L)1 checkpoint inhibition, may be considered eligible after discussion with the coordinating investigator if adverse events have recovered, i.e. ≤ Grade 1 or at baseline.
   • Note: If subjects received major surgery (defined as surgical intervention requiring general or spinal anesthesia and hospital admission), they must have recovered adequately from the toxicity and/or complications from the intervention prior to starting therapy. Major surgery within 14 days prior to start of study treatment is not allowed.
4. Has had previous radical radiation to any tumor site within 3 months prior to study Day 1. Previous palliative radiation to any tumor site is not considered an exclusion criterion; however, this site will not be eligible for SBRT, biopsy location or RECIST tumor evaluation within this study.
5. Has received prior therapy with any antibody or drug specifically targeting T-cell co-stimulation or checkpoint pathways other than PD-(L)1 blockade, e.g. anti-CD137 or a CTLA-4 antibody.

6. Patients who have uncontrolled central nervous system (CNS) metastases. Patients who have untreated asymptomatic CNS metastases no greater than 2cm before start of treatment may be eligible. Patients who have any CNS lesion that is symptomatic, greater than 2cm, show significant surrounding edema on MRI scan or have leptomeningeal disease will not be eligible. Patients who have previously been treated for CNS metastases are eligible when they comply with the hereby mentioned criteria.

   NB. A brain lesion is not amendable for study SBRT.

7. Has a known additional malignancy that is progressing or requires active treatment.
8. Has an active autoimmune disease or a documented history of clinically severe autoimmune disease or syndrome that requires systemic steroids or immunosuppressive agents. Subjects who require intermittent use of bronchodilators or local steroid injections would not be excluded from the study. Patients with an active or history of autoimmune disease or syndrome who underwent previous PD-(L)1 checkpoint inhibition without significant side effects, i.e. not requiring use of steroids or other anti-inflammatory drugs and/or the need to (temporarily) withhold PD-(L)1 checkpoint inhibition, may be considered eligible for this trial after discussion with the coordinating investigator. Requirement for immunosuppressive doses of systemic corticosteroids ≤10 mg/day prednisone or equivalent may be considered eligible after discussion as well.
9. Has evidence of symptomatic interstitial lung disease or an active, non-infectious pneumonitis.
10. Has an active infection requiring systemic therapy.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm

Intervention / Treatment

Experimental: Anti-CTLA-4, SBRT and PD1; Participants will receive 1 dose of ipilimumab (1mg/kg intravenously) on day 1. After 1 week the participants will receive SBRT (3x8Gy) on at least 1 but no more than 4 tumor lesions. Within 1 week of the last radiation fraction participants will start with cemiplimab (350mg intravenously every 3 weeks) until disease progression, unacceptable toxicity, patient request for discontinuation, or up to 2 years of treatment

Drug: Ipilimumab; Anti-CTLA-4; Drug: Cemiplimab; PD-1 inhibition; Radiation: SBRT; Stereotactic Body Radiotherapy

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Clinical Benefit Rate	Number of participants with complete response or partial response within the first 6 months or stable disease lasting for minimum 6 months	Through study completion, an average of 1 year

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Objective Response Rate	Number of participants with complete response or partial response	12 weeks after re-introduction of PD-1 inhibition (day 1 of week 15)
Disease Control Rate	Number of participants with complete response, partial response, or stable disease	12 weeks after re-introduction of PD-1 inhibition (day 1 of week 15)
Best overall response	Best overall response at any time point	Through study completion, an average of 1 year
Progression Free Survival	Time between start of treatment and progressive disease or death	From date of start of treatment until first documented progression or the date of death assessed up to 100 months
Overall Survival	Time between start of treatment and death	From date of start of treatment until the date of death assessed up to 100 months
Safety of the study procedure	Number of participants with treatment-related adverse events as assessed by CTCAE v5.0	Up to 90 days after last study drug intake

Other Outcome Measures

Outcome Measure	Measure Description	Time Frame
Genetic characteristics and signatures of responders vs non-responders 1	Whole Exome Sequencing of tumor biopsies	At baseline and week 3 (before initiation of PD-1 inhibition)
Genetic characteristics and signatures of responders vs non-responders 2	RNA sequencing of tumor biopsies	At baseline and week 3 (before initiation of PD-1 inhibition)
Changes in TCR repertoire	Changes in TCR repertoire at baseline versus on-treatment tumor biopsies	At baseline and week 3 (before initiation of PD-1 inhibition)
Changes in protein expression	Multi-staining immunohistochemistry analysis at baseline versus on-treatment tumor biopsies	At baseline and week 3 (before initiation of PD-1 inhibition)
Changes in blood proteomics profile	Changes in blood proteomics profile during treatment	At baseline, week 2, 3 and 5 on treatment and at end-of-treatment (an average of 1 year)
Changes in ctDNA	Changes in ctDNA during treatment	At baseline, week 2, 3 and 5 on treatment and at end-of-treatment (an average of 1 year)

Collaborators and Investigators

• Sponsor: The Netherlands Cancer Institute
• Collaborators: Genzyme, a Sanofi Company
• Investigators: Principal Investigator: W.S.M.E Theelen, MD,PhD, NKI-AvL

Study record dates

Study Major Dates

• Study Start (Actual): January 3, 2023
• Primary Completion (Actual): November 15, 2024
• Study Completion (Estimated): June 1, 2026

Study Registration Dates

• First Submitted: May 17, 2022
• First Submitted That Met QC Criteria: May 30, 2022
• First Posted (Actual): June 2, 2022

Study Record Updates

• Last Update Posted (Actual): March 12, 2026
• Last Update Submitted That Met QC Criteria: March 11, 2026
• Last Verified: March 1, 2026

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Neoplasms by Site; Neoplasms; Respiratory Tract Diseases; Lung Diseases; Respiratory Tract Neoplasms; Thoracic Neoplasms; Lung Neoplasms; Carcinoma, Bronchogenic; Bronchial Neoplasms; Carcinoma, Non-Small-Cell Lung; Amino Acids, Peptides, and Proteins; Proteins; Antibodies, Monoclonal, Humanized; Antibodies, Monoclonal; Antibodies; Immunoglobulins; Immunoproteins; Blood Proteins; Serum Globulins; Globulins; Ipilimumab; cemiplimab
• Other Study ID Numbers: M21RAD

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No