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Calcitriol Plus Paclitaxel in Treating Patients With Advanced Solid Tumors

2014-08-27 03:57:10 | BioPortfolio

Summary

RATIONALE: Drugs used in chemotherapy use different ways to stop tumor cells from dividing so they stop growing or die. Calcitriol may increase the effectiveness of paclitaxel by making tumor cells more sensitive to the drug.

PURPOSE: Phase I trial to study the effectiveness of combining calcitriol with paclitaxel in treating patients who have advanced solid tumors.

Description

OBJECTIVES:

- Determine the toxic effects and maximum tolerated dose of calcitriol when combined with paclitaxel in patients with advanced solid tumors.

- Determine the effect of administration of calcitriol on the pharmacokinetics of paclitaxel in these patients.

- Determine the effect of administration of paclitaxel on the pharmacokinetics of calcitriol in these patients.

OUTLINE: This is a dose-escalation study of calcitriol.

During course 1, patients receive oral calcitriol daily on days 1-3 of weeks 1-6 and paclitaxel IV over 1 hour on day 1 of week 1 and day 3 of weeks 2-6. During course 2 and subsequent courses, patients receive oral calcitriol daily on days 1-3 and paclitaxel IV over 1 hour on day 3 of weeks 1-6. Treatment continues every 8 weeks in the absence of disease progression or 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 highest dose giving an estimated probability of dose-limiting toxicity of no more than 0.30.

PROJECTED ACCRUAL: A total of 60 patients will be accrued for this study.

Study Design

Primary Purpose: Treatment

Conditions

Unspecified Adult Solid Tumor, Protocol Specific

Intervention

calcitriol, paclitaxel

Location

University of Pittsburgh Cancer Institute
Pittsburgh
Pennsylvania
United States
15213-3489

Status

Completed

Source

National Cancer Institute (NCI)

Results (where available)

View Results

Links

Published on BioPortfolio: 2014-08-27T03:57:10-0400

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Medical and Biotech [MESH] Definitions

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.

An injectable formulation of albumin-bound paclitaxel NANOPARTICLES.

A solid, unencapsulated tumor of the KIDNEY composed of spindle mesenchymal cells that resemble FIBROBLASTS or muscle cells. The homogeneous mass typically extends into the renal parenchyma and replaces most of the kidney. In most cases, mesoblastic nephroma is benign and occurs in the fetus or newborn, and rarely in the older child or the adult.

A transplantable, poorly differentiated malignant tumor which appeared originally as a spontaneous breast carcinoma in a mouse. It grows in both solid and ascitic forms.

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.

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