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Study of PULSAR-ICI +/- IMSA101 in Patients With Oligometastatic NSCLC and RCC

Phase 2 Randomized Clinical Trial Comparing the Safety and Efficacy of PULSAR-Integrated Radiotherapy + Pembrolizumab or Nivolumab Administered With or Without STING-Agonist IMSA101 in Patients With Oligometastatic NSCLC and RCC

Status
Terminated
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05846646
Enrollment
6
Registered
2023-05-06
Start date
2023-06-28
Completion date
2024-09-16
Last updated
2025-10-20

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

Conditions

Oligometastatic Disease

Keywords

Non-small cell lung cancer (NSCLC), Renal cell carcinoma (RCC), Adult

Brief summary

Phase 2, open-label, multicenter, randomized study comparing the safety and efficacy of personalized ultra-fractionated stereotactic adaptive radiotherapy (PULSAR) combined with immune checkpoint inhibitor (ICI) immunotherapy (PULSAR-ICI) + IMSA101 and PULSAR-ICI alone in patients with NSCLC or RCC

Detailed description

Patients shall be enrolled in 2 treatment arms as follows: 1. 20 patients in the control arm (PULSAR-ICI alone) 2. 20 patients in the experimental arm (PULSAR-ICI + IMSA101) Patients will be stratified by histology (NSCLC and RCC) in the randomized portion. PULSAR-ICI with or without IMSA101 treatment will be administered to the patients in Cycles 1, 2, and 3, and thereafter only standard of care ICI monotherapy will be administered to all patients. Each treatment cycle will be 28 days in duration for Cycles 1, 2 and 3, then per standard of care monotherapy thereafter based on the product labels of the prescribed ICI. The study will start with a safety run-in portion at 2 dose levels for the experimental arm, followed by a randomized portion for both treatment arms. The safety run-in shall employ a 3+3 safety run-in component. All patients will be followed throughout the study for drug tolerability and safety by collecting clinical and laboratory data, including adverse events (AEs) using Common Terminology Criteria for Adverse Events (CTCAE) Version 5.0 criteria, SAEs, concomitant medications, and vital signs. All patients will be assessed for anti-tumor efficacy at screening, prior to the end of Cycle 3, and at 8-week intervals thereafter based on radiographic assessments (all outcome measures per RECIST Version 1.1 and iRECIST). All patients will continue to receive their assigned treatment throughout the study until the occurrence of disease progression (based on iRECIST), death, or other unacceptable treatment-related toxicity, or until the study is closed by the sponsor.

Interventions

Intra-tumoral administration once weekly for the first three weeks of Cycle 1 (Days 1, 8 and 15) and then on Day 1 of Cycles 2 and 3.

DRUGImmune checkpoint inhibitor

1st infusion on Cycle 1 Day 2, and then thereafter as per product label

RADIATIONPULSAR

1st day of Cycles 1, 2 and 3.

Sponsors

ImmuneSensor Therapeutics Inc.
Lead SponsorINDUSTRY

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. Male or female patients ≥ 18 years of age 2. Signed informed consent and mental capability to understand the informed consent 3. Histologically or cytologically documented NSCLC or RCC with radiographically documented presence of ≤ 6 metastatic lesions consistent with the diagnosis of oligometastatic disease 4. Patient's disease must be evaluable per RECIST Version 1.1 5. All metastatic lesions amenable to administration of radiotherapy, at the discretion of the investigator 6. Must have at least one single pre-defined lesion/lesion site (longest diameter ≥ 10 mm and ≤ 50 mm) suitable for intra-tumoral injection 7. Eastern Cooperative Oncology Group (ECOG) performance status of ≤ 1 8. Electrocardiogram (ECG) without evidence of clinically significant conduction abnormalities or active ischemia as determined by the investigator 9. Acceptable organ and marrow function as defined below: * Absolute neutrophil count (ANC) \> 1,500 cells/μL * Platelets \> 50,000 cells/μL * Total bilirubin ≤ 1.5 times (×) the upper limit of normal (ULN) * Aspartate aminotransferase (AST)/alanine aminotransferase (ALT) ≤ 2.5 × ULN. If liver metastases are present, AST/ALT \< 5 × ULN * Serum creatinine \< 1.5 mg/dL and a measured creatinine clearance ≥ 50 mL/min using the Cockcroft-Gault formula * Prothrombin time (PT)/partial thromboplastin time (PTT) ≤ 1.5 × ULN 10. Women of child-bearing potential (defined as a female who has experienced menarche and who has not undergone successful surgical sterilization \[hysterectomy, bilateral salpingectomy, or bilateral oophorectomy\]) or is not postmenopausal (defined as amenorrhea for at least 12 consecutive months with an appropriate clinical profile at the appropriate age, eg, greater than 45 years) must have a negative serum pregnancy test prior to first dose of study treatment 11. Male and female patients with reproductive potential must agree to use two forms of highly effective contraception throughout the study

Exclusion criteria

1. Prior disease progression through programmed cell death ligand 1 (PD-L1 or PD-1)-targeted immunotherapy 2. Prior receipt of stimulator of interferon genes (STING) agonist 3. Prior receipt of therapeutic radiotherapy to the lesions intended for PULSAR treatment 4. Anti-cancer therapy, except pembrolizumab and nivolumab, within 4 weeks or \< 5 half-lives of the first dose of study treatment 5. Existence of primary tumor that requires therapeutic treatment beyond the provided immune checkpoint inhibitor drug 6. Failure to recover, to Grade 1 or less, from clinically significant AEs due to prior anti-cancer therapy, as judged by the investigator 7. Previous life-threatening (Grade 4) immune-related adverse event (irAE) 8. Existence of actionable mutations that may be eligible for mutation-targeted drug that represents standard-of-care therapy 9. Presence of brain metastases 10. Baseline prolongation of QT/corrected QT (QTc) interval (QTc interval \> 470) 11. Uncontrolled intercurrent illness (including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations) that in the opinion of the investigator would limit compliance with study requirements 12. Women who are pregnant or breastfeeding 13. Sponsor reserves the right to exclude any patient from the study on the basis of pre-study medical histories, physical examination findings, clinical laboratory results, prior medications, or other entrance criteria

Design outcomes

Primary

MeasureTime frameDescription
Anti-tumor Effects18 monthsProgression-free rate at 18 months

Secondary

MeasureTime frameDescription
Number of Participants With Treatment-related Adverse EventsEnrolment through end of study period (1 year, 3 months). AE data captured continually.Occurrence of treatment-related adverse events
Anti-tumor Effects6 to 22 monthsProgression-free at 8-week intervals from 6 months to 22 months
Quality of Life (QoL)upon enrolment through end of study period (2 years)Patient reported outcome on FACT-G questionnaire

Countries

United States

Participant flow

Recruitment details

Study was terminated early by sponsor due to change in corporate strategy.

Participants by arm

ArmCount
Experimental Arm (800 mcg)
PULSAR-ICI + IMSA101 (800 mcg)
3
Experimental Arm (1200 mcg)
PULSAR-ICI + IMSA101 (1200 mcg)
3
Control Arm
PULSAR - ICI
0
Total6

Withdrawals & dropouts

PeriodReasonFG000FG001FG002
Overall StudyEarly Study Termination120
Overall StudyLack of Efficacy110
Overall StudyPhysician Decision100

Baseline characteristics

CharacteristicExperimental Arm (800 mcg)Experimental Arm (1200 mcg)Control ArmTotal
Age, Categorical
<=18 years
0 Participants0 Participants0 Participants0 Participants
Age, Categorical
>=65 years
3 Participants2 Participants0 Participants5 Participants
Age, Categorical
Between 18 and 65 years
0 Participants1 Participants0 Participants1 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
1 Participants0 Participants0 Participants1 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
2 Participants3 Participants0 Participants5 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Asian
1 Participants0 Participants0 Participants1 Participants
Race (NIH/OMB)
Black or African American
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
White
2 Participants3 Participants0 Participants5 Participants
Sex: Female, Male
Female
2 Participants1 Participants0 Participants3 Participants
Sex: Female, Male
Male
1 Participants2 Participants0 Participants3 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
deaths
Total, all-cause mortality
0 / 30 / 30 / 0
other
Total, other adverse events
3 / 33 / 30 / 0
serious
Total, serious adverse events
2 / 31 / 30 / 0

Outcome results

Primary

Anti-tumor Effects

Progression-free rate at 18 months

Time frame: 18 months

Population: Data were not collected due to study termination prior to participants' assessment at the 18-month time point

Secondary

Anti-tumor Effects

Progression-free at 8-week intervals from 6 months to 22 months

Time frame: 6 to 22 months

Population: Data were not collected due to study termination prior to participants' assessment at the 18-month time point

Secondary

Anti-tumor Effects

Time to progression

Time frame: upon enrolment through end of study period (2 years)

Population: Data were not collected due to study termination prior to participants' assessment at the 18-month time point

Secondary

Anti-tumor Effects

Overall response rate, duration of response, progression-free survival

Time frame: upon enrolment through end of study period (2 years)

Population: Data were not collected due to study termination prior to participants' assessment at the 18-month time point

Secondary

Number of Participants With Treatment-related Adverse Events

Occurrence of treatment-related adverse events

Time frame: Enrolment through end of study period (1 year, 3 months). AE data captured continually.

Population: Zero patients enrolled to Control Arm during Safety Run In period.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Experimental Arm (800 mcg)Number of Participants With Treatment-related Adverse Events3 Participants
Experimental Arm (1200 mcg)Number of Participants With Treatment-related Adverse Events3 Participants
Control ArmNumber of Participants With Treatment-related Adverse Events0 Participants
Secondary

Quality of Life (QoL)

Patient reported outcome on FACT-G questionnaire

Time frame: upon enrolment through end of study period (2 years)

Population: Data were not collected due to study termination prior to participants' assessment at the 18-month time point

Source: ClinicalTrials.gov · Data processed: Feb 6, 2026