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Calcitriol and Temozolomide in Treating Patients With Metastatic Melanoma

2014-08-27 03:45:44 | BioPortfolio

Summary

RATIONALE: Drugs used in chemotherapy, such as temozolomide, work in different ways to stop the growth of tumor cells, either by killing the cells or by stopping them from dividing. Calcitriol may help temozolomide kill more tumor cells by making them more sensitive to the drug. Calcitriol may also stop the growth of melanoma by blocking blood flow to the tumor.

PURPOSE: This phase I/II trial is studying the best dose of calcitriol, the side effects of calcitriol when given together with temozolomide, and to see how well they work in treating patients with metastatic stage IV melanoma.

Description

OBJECTIVES:

Primary

- Determine the maximum tolerate dose of high-dose calcitriol when administered with temozolomide in patients with metastatic melanoma.

- Assess toxicity of seven-day on/seven-day off temozolomide in combination with high-dose calcitriol.

Secondary

- Determine tumor response and time to progression.

- Investigate the relationship between vitamin D-receptor gene polymorphisms and tumor response.

OUTLINE: This is a dose-escalation study of calcitriol followed by a phase II study.

- Phase I: Patients receive oral calcitriol on days 1 and 15 and oral temozolomide on days 2-8 and 16-22. Treatment repeats every 28 days for 2 courses in the absence of unacceptable toxicity. Responding patients continue therapy for up to 6 courses in the absence of unacceptable toxicity.

Cohorts of 3-6 patients receive escalating doses of calcitriol until the maximum tolerated dose (MTD) is determined. The MTD is defined as the dose preceding that at which 2 of 6 patients experience dose limiting toxicity.

- Phase II: Patients receive temozolomide and calcitriol at the MTD as in phase I.

After completion of study treatment, patients are followed every 3 months.

PROJECTED ACCRUAL: A total of 28 patients will be accrued for this study.

Study Design

Primary Purpose: Treatment

Conditions

Intraocular Melanoma

Intervention

calcitriol, temozolomide

Location

Robert H. Lurie Comprehensive Cancer Center at Northwestern University
Chicago
Illinois
United States
60611-3013

Status

Recruiting

Source

National Cancer Institute (NCI)

Results (where available)

View Results

Links

Published on BioPortfolio: 2014-08-27T03:45:44-0400

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Medical and Biotech [MESH] Definitions

An unpigmented malignant melanoma. It is an anaplastic melanoma consisting of cells derived from melanoblasts but not forming melanin. (Dorland, 27th ed; Stedman, 25th ed)

Proteins, usually found in the cytoplasm, that specifically bind calcitriol, migrate to the nucleus, and regulate transcription of specific segments of DNA with the participation of D receptor interacting proteins (called DRIP). Vitamin D is converted in the liver and kidney to calcitriol and ultimately acts through these receptors.

Experimentally induced tumor that produces MELANIN in animals to provide a model for studying human MELANOMA.

The physiologically active form of vitamin D. It is formed primarily in the kidney by enzymatic hydroxylation of 25-hydroxycholecalciferol (CALCIFEDIOL). Its production is stimulated by low blood calcium levels and parathyroid hormone. Calcitriol increases intestinal absorption of calcium and phosphorus, and in concert with parathyroid hormone increases bone resorption.

A cellular subtype of malignant melanoma. It is a pigmented lesion composed of melanocytes occurring on sun-exposed skin, usually the face and neck. The melanocytes are commonly multinucleated with a "starburst" appearance. It is considered by many to be the in situ phase of lentigo maligna melanoma.

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