Clinical trial NCT00005884: Eflornithine to Prevent Skin Cancer in Patients With Previously Treated Early Stage Skin Cancer
Official title: Chemoprevention of Skin Cancers With DFMO: A Controlled, Randomized Clinical Trial
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: PHASE3
Conditions: Non-melanomatous Skin Cancer
Keywords: basal cell carcinoma of the skin
squamous cell carcinoma of the skin
Lead sponsor: University of Wisconsin, Madison
Sponsor class: OTHER
Collaborators: name: National Cancer Institute (NCI)
First posted: 2004-07-26
Sex: ALL
Minimum age (years): 21
Maximum age (years): 120
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Primary purpose: PREVENTION

Brief summary: RATIONALE: Chemoprevention therapy is the use of certain drugs to try to prevent the development or recurrence of cancer. The use of eflornithine may be an effective way to prevent the recurrence of or further development of skin cancer.

PURPOSE: Randomized phase III trial to determine the effectiveness of eflornithine in preventing skin cancer in patients who have previously received treatment for early stage skin cancer.

Detailed description: OBJECTIVES: I. Compare the rate of new skin cancer in patients with previously treated stage 0, I, or II basal or squamous cell skin cancer treated with eflornithine (DFMO) vs placebo. II. Determine whether inhibition of TPA-induced ornithine decarboxylase activity serves as an intermediary marker for response to DFMO in these patients. III. Determine whether inhibition of skin polyamine levels serves as an intermediary marker for response to DFMO in these patients. IV. Assess the long term toxic effects of this treatment in these patients.

OUTLINE: This a randomized, double blind, placebo controlled, multicenter study. Patients receive oral placebo daily for the first 4 weeks. Patients who comply with taking 80-100% of placebo are randomized to one of two treatment arms. Arm I: Patients receive oral eflornithine (DFMO) daily. Arm II: Patients receive an oral placebo daily. Treatment continues for 3-5 years in the absence of unacceptable toxicity. Patients who develop skin cancer during study undergo surgical excision and continue treatment on the arm to which they were originally randomized. Patients are followed every 6 months through year 5.

PROJECTED ACCRUAL: A total of 334 patients (167 per arm) will be accrued for this study over 2 years.

Eligibility criteria: DISEASE CHARACTERISTICS: Histologically proven previously treated stage 0, I, or II basal or squamous cell skin cancer

PATIENT CHARACTERISTICS: Age: 21 and over Performance status: ECOG 0-1 Life expectancy: Not specified Hematopoietic: WBC at least 3,500/mm3 Platelet count at least 100,000/mm3 Hemoglobin at least 11.0 g/dL Hepatic: Bilirubin no greater than 2 mg/dL SGOT less than 3 times normal Renal: Creatinine less than 2.0 mg/dL Other: Not pregnant or nursing Negative pregnancy test Fertile patients must use effective contraception No significant clinical hearing loss or use of hearing aid No family history of early retinal blindness or ornithine diaminotransferase deficiency

PRIOR CONCURRENT THERAPY: Biologic therapy: No prior bone marrow transplant No concurrent tamoxifen for cancer treatment or prophylaxis Chemotherapy: Greater than 4 weeks since prior chemotherapy No concurrent cytotoxic chemotherapy Endocrine therapy: Greater than 4 weeks since prior hormonal therapy for cancer No concurrent prednisone No concurrent hormonal therapy for cancer treatment or prophylaxis Radiotherapy: Greater than 4 weeks since prior radiotherapy Surgery: Greater than 4 weeks since prior major surgery No prior solid organ transplant Other: At least 4 weeks since prior topical medications (e.g., tretinoin, isotretinoin, psoralen ultraviolet light therapy, or fluorouracil) for skin cancer No concurrent antiseizure medication

Primary outcomes:
Secondary outcomes:
Other outcomes:
Locations:
Study officials:
affiliation: University of Wisconsin, Madison
name: Paul P. Carbone, MD
role: STUDY_CHAIR
References: