A Randomized Study of the Effect of Alpha-tocopherol (AT) on 13-cis-retinoic Acid (13-cRA) Toxicity in a Preliminary Chemoprevention Trial in Former and Current Smokers
Vitamin E (AT)
+ Isotretinoin
+ Isotretinoin
Bronchial Neoplasms+8
+ Carcinoma, Bronchogenic
+ Lung Diseases
Prevention Study
Summary
OBJECTIVES: I. Determine whether the addition of alpha-tocopherol (AT; vitamin E) to isotretinoin decreases the incidence of Grade II and higher toxicity of isotretinoin when administered to former and current smokers. II. Determine the compliance rate of isotretinoin of smoker and former smokers with or without AT over a six month period. III. Determine the feasibility of recruiting former and current smokers with or without AT over a six month period. IV. Determine the effect of isotretinoin administration on serum retinol and retinol-binding protein levels in these patients. OUTLINE: This is randomized, placebo controlled study. Patients are stratified by smoking status (current smoker vs former smoker) and age (less than 50 vs 50 and over). Patients are randomized to be take alpha-tocopherol (AT) orally and isotretinoin orally daily (arm I) or isotretinoin orally plus AT placebo orally daily (arm II). Treatment in each arm continues for 6 months. Patients are followed at 1, 3, 6, and 7 months from start of treatment. PROJECTED ACCRUAL: There will be 300 patients (150 per arm) accrued into this study over an estimated 9 months.
Protocol
This section provides details of the study plan, including how the study is designed and what the study is measuring.Prevention Study
Eligibility
Researchers look for people who fit a certain description, called eligibility criteria: person's general health condition or prior treatments.Any sex
Biological sex of participants that are eligible to enroll.Over 18 Years
Range of ages for which participants are eligible to join.Healthy volunteers not allowed
If individuals who are healthy and do not have the condition being studied can participate.Conditions
Pathology
Criteria
DISEASE CHARACTERISTICS: Current smokers with 20+ packs per year history of smoking OR Former smokers who discontinued smoking 1 year prior to registration (less than 5 cigarettes in the prior year) and had a 20+ packs per year history prior to discontinuing smoking PATIENT CHARACTERISTICS: Age: 18 and over Performance status: Not specified Life expectancy: Not specified Hematopoietic: WBC greater than 3,000/mm3 Platelet count greater than 100,000/mm3 Hepatic: Bilirubin less than 1.5 mg/dL SGOT less than 40 IU/mL OR SGPT less than IU/mL Renal: Not specified Other: Fasting triglycerides less than 320 mg/dL No prior malignancy in the past 5 years except nonmelanoma skin cancer or noninvasive cervical cancer No history of malabsorption syndrome Not pregnant Effective contraception required of all fertile persons PRIOR CONCURRENT THERAPY: Biologic therapy: Not specified Chemotherapy: No prior isotretinoin Endocrine therapy: Not specified Radiotherapy: Not specified Surgery: Not specified Other: No prior warfarin or its derivatives At least 3 months since megadose vitamin A (greater than 25,000 IU/day) or beta-carotene greater than 30 mg/day or alpha-tocopherol at least 400 IU daily No concurrent megadose vitamin A (greater than 25,000 IU/day), beta-carotene greater than 30 mg/day, alpha-tocopherol at least 400 IU daily, or other daily supplements and tonics
Study Plan
Find out more about all the medication administered in this study, their detailed description and what they involve.2 intervention groups are designated in this study
This study does not include a placebo group
Treatment Groups
Group I
ExperimentalGroup II
ExperimentalStudy Objectives
Primary Objectives