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Evaluation of toxicity and single-dose pharmacokinetics of intravenous ursolic acid liposomes in healthy adult volunteers and patients with advanced solid tumors.

06:00 EST 9th November 2012 | BioPortfolio

Summary of "Evaluation of toxicity and single-dose pharmacokinetics of intravenous ursolic acid liposomes in healthy adult volunteers and patients with advanced solid tumors."

Objective: The purpose of this study was to investigate the maximum tolerated dose (MTD), dose-limiting toxicity (DLT), and pharmacokinetics of ursolic acid liposomes (UAL), as a new drug, in healthy adult volunteers and patients with advanced solid tumors. Methods: All subjects received a single-dose of UAL (11, 22, 37, 56, 74, 98, and 130 mg/m(2)) administered as a 4-h intravenous infusion. Toxicity was assessed and plasma samples were analyzed using validated ultra-performance liquid chromatograph/tandem mass spectroscopy method. Results: A total of 63 subjects including 4 patients and 35 healthy adult volunteers for toxicity study and 24 healthy adult volunteers for pharmacokinetic study were enrolled in this trial. The DLT was encountered at 74, 98, and 130 mg/m(2), and consisted of hepatotoxicity and diarrhea. Other adverse events included grade 1 nausea, grade 2 abdominal distention, grade 1 microscopic hematuria, grade 2 elevated serum sodium, grade 1 vascular stimulation, and grade 1 skin rash. The MTD was 98 mg/m(2). The single-dose pharmacokinetic parameters revealed a linear relationship between C(max), AUC(0→24 h), or AUC(0→∞) and escalated doses. Conclusions: The clinical data reported for the first time that UAL had manageable toxicities with MTD of 98 mg/m(2). The DLT were hepatotoxicity and diarrhea. Meanwhile, UAL had a linear pharmacokinetic profile. The registration number of this trial is ChiCTR-ONC-12002385.

Affiliation

Tianjin Medical University, Tianjin Medical University Cancer Hospital and Institute, Sino-US Center for Lymphoma and Leukemia, Department of Lymphoma, Key Laboratory of Cancer Prevention and Therapy , Tiyuanbei, Huanhuxi Road, Hexi District, Tianjin 3000

Journal Details

This article was published in the following journal.

Name: Expert opinion on drug metabolism & toxicology
ISSN: 1744-7607
Pages:

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Medical and Biotech [MESH] Definitions

A pentacyclic triterpene that occurs widely in many PLANTS as the free acid or the aglycone for many SAPONINS. It is biosynthesized from lupane. It can rearrange to the isomer, ursolic acid, or be oxidized to taraxasterol and amyrin.

The dose amount of poisonous or toxic substance or dose of ionizing radiation required to kill 50% of the tested population.

A plant genus of the family VALERIANACEAE. Members contain ursolic acid and oleanolic acid glycosides, sulfapatrinosides (triterpenoid glycosides), and patriscabrol (iridolactone).

A plant genus in the family CAPRIFOLIACEAE. The common name derives from its traditional use for menstrual cramps. It is a source of viburnine, valerianic acid, vibsanin, and ursolic acid. Note that true cranberry is VACCINIUM MACROCARPON.

Mice selectively bred for hypersusceptibility to two-stage chemical skin carcinogenesis. They are also hypersusceptible to UV radiation tumorigenesis with single high-dose, but not chronic low-dose, exposures. SENCAR (SENsitive to CARcinogenesis) mice are used in research as an animal model for tumor production.

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