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Study of Individualized Amonafide to Treat Prostate Cancer

2014-08-27 03:54:12 | BioPortfolio

Summary

The purpose of this study is to assess the safety and efficacy of Amonafide in men with androgen-independent prostate cancer, assigned to individualized doses of Amonafide based on acetylator phenotype information (doses adjusted on individual metabolism).

Description

This is an open-label, Phase I/II, multicenter study of Amonafide in subjects with androgen-independent metastatic prostate cancer.

Amonafide is metabolized by N-acetylation to an active metabolite, N-acetyl-Amonafide. Inter-subject differences in N-acetylation can explain the variability in Amonafide-induced myelosuppression. This dose-defining protocol has been designed to assess safety and efficacy of Amonafide in men with androgen-independent prostate cancer, assigned to individualized doses based on acetylator phenotype information.

The total duration of this study will be approximately 12 - 16 months: approximately 6 - 10 months for enrollment, and approximately 6 months for subject screening, treatment, and follow up per protocol. Subjects will be treated until PSA progression, disease progression, or unacceptable toxicity.

Subjects may continue participation in the study after Cycle 5 at the investigator's discretion if PSA progression, disease progression, or unacceptable toxicities are not reported. If a subject fulfills a criterion of PSA progression or disease progression, yet in the opinion of the investigator, the subject appears to be deriving clinical benefit from the study medication, a request may be made to the Xanthus medical monitor to allow that subject to continue study participation on a compassionate basis.

A follow-up evaluation for all subjects will be done 30 - 35 days after receiving the last dose of Amonafide. Subjects will be contacted every 3 months for survival after completion of the active phase of the study, until death.

PSA response will be reported for all subjects receiving Amonafide treatment. PSA levels will be measured at Screening and once per treatment cycle thereafter (at Day 1 of each cycle). A PSA responder will be defined as a subject experiencing a 50% decrease in PSA level, confirmed four or more weeks later, with no demonstration of clinical or radiographic evidence of disease progression prior to the second PSA measurement. Duration PSA response and time to PSA progression will also be reported.

In addition to PSA endpoints, traditional response criteria such as overall tumor response rate (complete + partial tumor response), duration of tumor response, and time to tumor progression will be captured for all subjects with measurable lesions. All complete and partial responses must be confirmed by repeat assessments that should be performed no less than 4 weeks after the criteria for response are met.

Subsequently, in order to evaluate safety, all subjects will be assessed for signs of adverse events according to the Common Terminology Criteria for Adverse Events (CTCAE) version 3 dated June 10, 2003.

All serious adverse events (SAEs) and grade ¾ toxicities will be reviewed by the Sponsor's medical monitor. Appropriate action may be taken to terminate or put the study on hold if warranted by unanticipated toxicity.

Study Design

Allocation: Non-Randomized, Control: Uncontrolled, Endpoint Classification: Pharmacokinetics Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment

Conditions

Prostate Cancer

Intervention

Amonafide L-malate (drug)

Location

USC Norris Comprehensive Cancer Center
Los Angeles
California
United States
90033

Status

Completed

Source

Xanthus Pharmaceuticals, Inc.

Results (where available)

View Results

Links

Published on BioPortfolio: 2014-08-27T03:54:12-0400

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Medical and Biotech [MESH] Definitions

A glycoprotein that is a kallikrein-like serine proteinase and an esterase, produced by epithelial cells of both normal and malignant prostate tissue. It is an important marker for the diagnosis of prostate cancer.

An enzyme that catalyzes the conversion of (S)-malate and NAD+ to oxaloacetate and NADH. EC 1.1.1.37.

A light-activated enzyme that catalyzes the oxidation of (S)-malate to OXALOACETATE. It is involved in PYRUVATE metabolism and CARBON fixation.

An important enzyme in the glyoxylic acid cycle which reversibly catalyzes the synthesis of L-malate from acetyl-CoA and glyoxylate. This enzyme was formerly listed as EC 4.1.3.2.

A synthetic retinoid that is used orally as a chemopreventive against prostate cancer and in women at risk of developing contralateral breast cancer. It is also effective as an antineoplastic agent.

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