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SABR-ATAC: A Trial of TGF-beta Inhibition and Stereotactic Ablative Radiotherapy for Early Stage Non-small Cell Lung Cancer

Fresolimumab and Stereotactic Ablative Radiotherapy in Early Stage Non-small Cell Lung Cancer

Status
Completed
Phases
Phase 1Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT02581787
Enrollment
28
Registered
2015-10-21
Start date
2016-08-31
Completion date
2023-03-02
Last updated
2024-03-27

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

Conditions

Stage IA Non-Small Cell Lung Carcinoma, Stage IB Non-Small Cell Lung Carcinoma

Brief summary

The SABR-ATAC trial (Stereotactic Ablative Radiotherapy and anti-TGFB Antibody Combination) is a phase I/II trial that studies the side effects and efficacy of fresolimumab, an anti-transforming growth factor beta (TGFB) antibody, when given with stereotactic ablative radiotherapy in patients with stage IA-IB non-small cell lung cancer. Fresolimumab may inhibit radiation side effects and block tumor growth through multiple mechanisms. Stereotactic ablative radiotherapy (SABR), also known as stereotactic body radiotherapy (SBRT), is a specialized form of radiation therapy that precisely delivers high dose radiation directly to tumors, thus killing tumor cells and minimizing damage to normal tissue. Giving fresolimumab with SABR may work better in treating patients with early stage non-small cell lung cancer than treating with SABR alone.

Detailed description

PRIMARY OBJECTIVES: Phase 1: Evaluate the safe dose of fresolimumab in combination with stereotactic ablative radiotherapy (SABR) in patients. Phase 2. Evaluate the rate of radiation induced pulmonary fibrosis after SABR plus fresolimumab. SECONDARY OBJECTIVES: I. Evaluate potential adverse events in patients receiving fresolimumab plus SABR. (Phase I) II. Evaluate post treatment changes in pulmonary function. (Phase I) III. Evaluate recurrence rates and progression free survival. (Phase I) IV. Assess pharmacokinetics (PK) of fresolimumab in combination with SABR (optional for patient). (Phase I) V. Evaluate the rate and severity of radiation induced pulmonary fibrosis after SABR plus fresolimumab. (Phase I) VI. Evaluate the severity of radiation induced pulmonary fibrosis after SABR plus fresolimumab. (Phase II) VII. Evaluate potential adverse events in patients receiving fresolimumab plus SABR. (Phase II) VIII. Evaluate post treatment changes in pulmonary function. (Phase II) IX. Evaluate recurrence rates and progression free survival. (Phase II) OUTLINE: This is a phase I, dose escalation study of fresolimumab followed by a phase II study. * Phase 1: A cohort of 5 patients receive the pre-selected dose of 3mg/kg of fresolimumab. If one patient experiences a DLT, an additional 5 patients will be enrolled at 3 mg/kg. If no more patients experience a DLT, then 3 mg/kg will be the dose for the Phase 2 component. If 2 or more patients experience a DLT in the total expanded cohort (or 2 or more patients in the initial cohort experience DLT), then the investigational dose of fresolimumab will be changed to 1 mg/kg. If 2 or more patients in the initial cohort experience DLT before all 5 patients have been enrolled, the remaining patients will receive the lower dose of 1 mg/kg. * Phase 2: Patients receive fresolimumab intravenously (IV) on days 1, 15, and 36 and undergo SABR in 4 fractions between days 8 and 12. After completion of study treatment, patients are followed up at 3, 6, and 12 months.

Interventions

BIOLOGICALFresolimumab

Given IV

RADIATIONStereotactic Body Radiation Therapy

Undergo SABR

Sponsors

Varian Medical Systems
CollaboratorINDUSTRY
Maximilian Diehn
Lead SponsorOTHER

Study design

Allocation
NON_RANDOMIZED
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

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

Inclusion criteria

* Newly diagnosed, histologically proven (or strongly suspected, see below) T1-T2aN0M0 (Stage IA-IB) non-small cell lung cancer (NSCLC), with maximum tumor diameter =\< 5 cm under consideration for stereotactic ablative body radiotherapy (SABR) as definitive primary treatment * Patient judged to be inoperable or at high surgical risk by a board qualified thoracic cancer surgeon who has evaluated the subject within the prior 12 weeks, or the patient's case has been discussed at a multidisciplinary tumor board with a thoracic cancer surgeon in attendance, or a patient who refuses surgery or declines to be evaluated for surgery. * Able to give informed consent * Eastern Cooperative Oncology Group (ECOG) performance status (PS) 0 to 2 * Men or women of child bearing potential must agree to use an acceptable method of birth control (hormonal or barrier method of birth control; abstinence) to avoid pregnancy for at least 90 days after last study treatment (radiation or fresolimumab)

Exclusion criteria

* Significant anemia (hemoglobin below 9.0 g/dL) or neutropenia (absolute neutrophil count \[ANC\] \< 1000/mm\^3) * Prior history of multifocal adenocarcinoma in situ (ie, classic or pure bronchioloalveolar carcinoma) * Prior history of keratoacanthoma (well differentiated squamous cell skin cancer variant, often centrally ulcerated); history of basal cell cancer is allowed * Pre malignant skin lesion(s) noted on prescreening skin exam, except for actinic (solar) keratosis * Prior radiotherapy overlapping with high dose region of planned SABR course * Prior history of head and neck; oral; or bladder cancer * Prior receipt of systemic treatment (chemotherapy, targeted therapy, or immunotherapy) for the lesion under consideration of treatment * Uncontrolled, inter current or recent illness that in the investigator's opinion precludes participation in the study, including those undergoing therapy for a separate invasive malignancy * Contraindication to receiving radiotherapy * Known allergy to components of fresolimumab * Pregnant or breastfeeding. All women of child bearing potential (last menstrual period within the previous 12 months and not surgically sterile) will be tested for pregnancy at pre entry.

Design outcomes

Primary

MeasureTime frameDescription
Number of Participants Experiencing Dose Limiting Toxicities (DLTs) of Fresolimumab When Combined With SABR (Phase I)Up to 30 daysDLT is defined as CTCAE grade 3 or higher radiation pneumonitis or bronchopulmonary hemorrhage.
Number of Participants With Late Radiation Induced Fibrosis12 monthsPresence of radiation induced pulmonary fibrosis is defined as presence of a moderate-to-severe level of fibrosis. This outcome is primary in phase 2 patients.

Secondary

MeasureTime frameDescription
Number of Participants With Late Radiation Induced Fibrosis (Phase 1 Patients)12 monthsPresence of radiation induced pulmonary fibrosis is defined as presence of a moderate-to-severe level of fibrosis. This outcome is secondary for phase 1 patients.

Countries

United States

Participant flow

Pre-assignment details

28 participants signed consent; 24 were allocated to treatment.

Participants by arm

ArmCount
(Phase 1) Fresolimumab 3 mg/kg
Patients receive fresolimumab 3 mg/kg IV on days 1, 15, and 36 and undergo SABR in 4 fractions between days 8 and 12.
5
(Phase 2) Fresolimumab
Fresolimumab will be administered IV at the dose selected in the preceding Phase 1 on Days 1, 15 and 36 and SABR will be administered in 4 fractions between Days 8 and 12.
19
Total24

Baseline characteristics

Characteristic(Phase 1) Fresolimumab 3 mg/kg(Phase 2) FresolimumabTotal
Age, Customized
50-59 years
0 Participants1 Participants1 Participants
Age, Customized
60-69 years
2 Participants4 Participants6 Participants
Age, Customized
70-79 years
3 Participants9 Participants12 Participants
Age, Customized
80-89 years
0 Participants5 Participants5 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
0 Participants0 Participants0 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
5 Participants19 Participants24 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Asian
0 Participants2 Participants2 Participants
Race (NIH/OMB)
Black or African American
0 Participants2 Participants2 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants1 Participants1 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants
Race (NIH/OMB)
White
5 Participants14 Participants19 Participants
Region of Enrollment
United States
5 Participants19 Participants24 Participants
Sex: Female, Male
Female
3 Participants8 Participants11 Participants
Sex: Female, Male
Male
2 Participants11 Participants13 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
4 / 55 / 19
other
Total, other adverse events
5 / 515 / 19
serious
Total, serious adverse events
0 / 56 / 19

Outcome results

Primary

Number of Participants Experiencing Dose Limiting Toxicities (DLTs) of Fresolimumab When Combined With SABR (Phase I)

DLT is defined as CTCAE grade 3 or higher radiation pneumonitis or bronchopulmonary hemorrhage.

Time frame: Up to 30 days

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
(Phase 1) Fresolimumab 3 mg/kgNumber of Participants Experiencing Dose Limiting Toxicities (DLTs) of Fresolimumab When Combined With SABR (Phase I)0 Participants
Primary

Number of Participants With Late Radiation Induced Fibrosis

Presence of radiation induced pulmonary fibrosis is defined as presence of a moderate-to-severe level of fibrosis. This outcome is primary in phase 2 patients.

Time frame: 12 months

Population: Patients who met criteria to be considered for endpoint analysis.

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
(Phase 1) Fresolimumab 3 mg/kgNumber of Participants With Late Radiation Induced Fibrosis5 Participants
Secondary

Number of Participants With Late Radiation Induced Fibrosis (Phase 1 Patients)

Presence of radiation induced pulmonary fibrosis is defined as presence of a moderate-to-severe level of fibrosis. This outcome is secondary for phase 1 patients.

Time frame: 12 months

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
(Phase 1) Fresolimumab 3 mg/kgNumber of Participants With Late Radiation Induced Fibrosis (Phase 1 Patients)1 Participants

Source: ClinicalTrials.gov · Data processed: Feb 7, 2026