Captopril in Treating Patients With Non-Small Cell Lung Cancer or Limited-Stage Small Cell Lung Cancer That Has Been Previously Treated With Radiation Therapy With or Without Chemotherapy

Study Overview
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Brief Summary
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RATIONALE: Captopril is a drug that may be able to decrease side effects caused by radiation therapy, and may improve the quality of life of patients with non-small cell lung cancer or limited-stage small cell lung cancer. PURPOSE: This randomized phase II trial is studying how well captopril works in decreasing side effects and improving the quality of life in patients who have received radiation therapy with or without chemotherapy for stage I, stage II, or stage IIIB non-small cell lung cancer or limited-stage small cell lung cancer.

Detailed Description
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OBJECTIVES: Determine the effect of captopril on the incidence of pulmonary damage at 12 months after radiotherapy with or without chemotherapy in patients with stage II-IIIB non-small cell lung cancer, stage I central non-small cell lung cancer, or limited stage small cell lung cancer. Compare the quality of life of patients treated with captopril vs patients who undergo post-radiotherapy observation only. Determine the persistence of captopril's effect on pulmonary toxicity in these patients. OUTLINE: This is a randomized, multicenter study. Patients are stratified according to participating center, total lung irradiated (< 25% vs 25-37% vs more than 37%), prior surgery (yes vs no), and prior chemotherapy (yes vs no). Patients are randomized to 1 of 2 treatment arms. Arm I: Patients receive oral captopril 3 times daily for 1 year in the absence of disease progression or unacceptable toxicity. Arm II: Patients undergo observation only for 1 year. Quality of life is assessed at baseline and at months 3, 6, 12, and 18. Patients are followed every 3 months for 1 year, every 6 months for 2 years, and then annually thereafter. PROJECTED ACCRUAL: A total of 205 patients will be accrued for this study within 18 months.

Official Title
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A Phase II Randomized Trial With Captopril In Patients Who Have Received Radiation Therapy +/- Chemotherapy For Stage II-IIIB Non-Small Cell Lung Cancer, Stage I Central Non-Small Cell Lung Cancer, Or Limited-Stage Small-Cell Lung Cancer

Conditions
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Lung Cancer, Pulmonary Complications, Radiation Fibrosis

Intervention / Treatment
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* Drug: captopril


Participation Criteria
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Eligibility Criteria
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DISEASE CHARACTERISTICS: One of the following histologically or cytologically confirmed diagnoses: Stage II-IIIB non-small cell lung cancer (NSCLC) Stage I central NSCLC No peripheral coin lesions Limited stage small cell lung cancer Nonmetastatic disease that is receiving radiotherapy and the target is confined to a single radiotherapy treatment area Planning to receive radiotherapy At least 45 Gy to be delivered to the target volume More than 25% of total lung volume to receive > 20 Gy if receiving radiotherapy alone PATIENT CHARACTERISTICS: Age 18 and over Performance status Zubrod 0-1 Hematopoietic Absolute granulocyte count greater than 1,000/mm^3 Platelet count greater than 75,000/mm^3 Hemoglobin greater than 9.0 g/dL (transfusion allowed) Hepatic Bilirubin less than 1.5 mg/dL Serum glutamate oxaloacetate transaminase (SGOT) less than 2 times normal Renal Blood urea nitrogen (BUN) less than 25 mg/dL Creatinine less than 1.6 mg/dL Urine protein less than 10 mg/dL Urine glucose negative Cardiovascular Systolic blood pressure greater than 110 mm Hg Diastolic blood pressure greater than 60 mm Hg Other Not pregnant or nursing Negative pregnancy test Fertile patients must use effective contraception Sodium normal Potassium normal No collagen vascular disease (e.g., lupus or scleroderma) Rheumatoid arthritis allowed No known hypersensitivity to ACE inhibitors PRIOR CONCURRENT THERAPY: Biologic therapy Not specified Chemotherapy Induction or concurrent chemotherapy allowed either during radiotherapy or during therapy with captopril No concurrent methotrexate Endocrine therapy Not specified Radiotherapy See Disease Characteristics Surgery Prior pulmonary lobectomy or segmentectomy allowed No prior pneumonectomy Other No concurrent angiotensin-converting enzyme (ACE) inhibitors or angiotensin II receptor antagonists for hypertension or congestive heart failure No concurrent lithium No concurrent procainamide

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Supportive Care
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| No Intervention: Observation<br>Clinical observation | |
| Experimental: Captopril<br>Captopril | Drug: captopril<br>* Captopril 12.5 mg t.i.d. for first two weeks, increased to 25 mg t.i.d. for the second two weeks of therapy. Thereafter, the dose will be increased to 50 mg t.i.d. for the remainder of the one-year of therapy (52 total weeks of drug administration).<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Incidence of Therapy-induced Lung Toxicity | Incidence of Grade 2+ radiation-induced pulmonary toxicity within 1 year after completion of radiation. Assuming that the incidence of pulmonary toxicity would be 50%, based on Fisher's exact test with a one-sided significance level of 0.05,168 randomized patients would be required to have 80% statistical power to detect a 40% relative reduction (from 50% to 30%) in the incidence of pulmonary toxicity while receiving captopril. Assuming that 15% of cases would not continue to the randomization stage and 5% of patients would be found ineligible, the target sample size was 205 patients. Given the actual sample size, power would be 25% and therefore p-values were not reported. | Once all patients have been followed for at least 12 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Correlation of Lung Toxicities With Biochemical Markers | Biomarker data will not be generated from these tissue specimens, therefore this analysis will not take place. | Once all patients have been followed for at least 12 months | 
| Correlation of Quality of Life With Late Effects as Measured by European Organization for Research and Treatment of Cancer (EORTC) C-30 or EORTC Lung Cancer Module (LC-13) | Only 2 patients have the required data- only 1.2% of the planned enrollment and 2.5% of the actual enrollment- which is extremely problematic as this data cannot be generalized, leads to selection bias, and is not representative of the patient population. Therefore the analysis was not conducted. | Baseline to 18 months post treatment | 
| Persistence of Pulmonary Toxicity at 2 Years After Completion of Study Treatment | Patients who experienced a Grade 2+ radiation-induced pulmonary toxicity within 1 year after completion of radiation were assessed to determine if the toxicity persisted for 2 years. | 2 years from completion of study treatment | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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radiation fibrosis, pulmonary complications, limited stage small cell lung cancer, stage II non-small cell lung cancer, stage IIIA non-small cell lung cancer, stage IIIB non-small cell lung cancer, stage I non-small cell lung cancer