Phase I Trial of S-1153 in Patients With HIV Infection

To assess the toxicity profile and determine the maximum tolerated dose (MTD), if possible, of S-1153 administered orally 3 times daily for 14 days. To investigate the clinical pharmacokinetic parameters for S-1153. To assess anti-HIV activity associated with S-1153 administration through evaluation of CD4 and viral load measurements.

Study Overview

• Status: Completed
• Conditions: HIV Infections
• Intervention / Treatment: Drug: Capravirine

Detailed Description

Two separate schedules of S-1153 are administered on this study: single dose (2 dose levels/cohorts) and repeated dose administration over 14 days (escalation through 4 dose levels/cohorts). All doses are determined by body weight.

Single-dose study (Cohort 1):

(4 patients) low-dose po, following a standardized morning meal. (4 patients) low-dose po, fasting.

Single-dose study (Cohort 2), administered during the first 3 levels of the repeated dose study and prior to the initiation of the 4th repeated dose level:

(4 patients): intermediate-dose po, following a standardized morning meal. (4 patients): intermediate-dose po, fasted. Following treatment with S-1153, all single-dose patients (Cohorts 1and 2) are observed for 21 days.

Repeated dose (escalation) study:

All doses are administered for 14 days. Three patients are entered at the starting dose of S-1153. In the absence of dose-limiting toxicity (DLT), subsequent 3-patient cohorts are entered at 3 escalating doses.

The last patient at any given dose level must be observed for 21 days prior to entry of patient at the next dose. If 1 of the initial 3 patients experiences DLT at a given level, 3 additional patients will be added at that dose; if no additional toxicity occurs, escalation resumes. If 2 or more patients at a given dose exhibit DLT, the previous dose is declared the maximum tolerated dose (MTD) and 3 additional patients (6 total) are treated at that dose.

• Study Type: Interventional
• Enrollment: 40
• Phase: Phase 1

Contacts and Locations

Study Locations

• United States
  • Massachusetts
    • Boston, Massachusetts, United States, 02215
      • Beth Israel Deaconess Med Ctr

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 70 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria

Concurrent Medication:

1. Required for patients with CD4 cell count lower than 200:

• PCP prophylaxis with aerosolized pentamidine, trimethoprim/sulfamethoxazole, mepron, or dapsone.
• Allowed:
• Continuation on an approved antiretroviral agent other than non-nucleoside reverse transcriptase inhibitors (e.g., Nevirapine) or other specifically excluded prior medications, if received without complications for at least 4 weeks prior to study entry.

Patients must have:

• Serologically documented HIV infection.
• Single-dose patients:
• CD4 cell count greater than 50 (no upper limit for single-dose cohorts). Repeated-dose patients:
• CD4 count from 50 to 500 within 35 days prior to entrance on study.
• No active opportunistic infection.

Prior Medication:

Allowed for entry onto multiple-dose study:

• Single-dose portion of S-1153 study, provided all study visits and evaluations are completed, all eligibility criteria are met, and a minimum of 30 days has elapsed before Day 1 of the repeated-dose administration.

Exclusion Criteria

Co-existing Condition:

Patients with the following symptoms or conditions are excluded:

Active opportunistic infection.

Concurrent Medication:

Excluded:

Concomitant use (within 5 half-lives prior to administration and for at least 24 hours following cessation of treatment with S-1153) of highly plasma-bound drugs with narrow therapeutic indices, including but not limited to coumadin and dilantin.

Prior Medication:

1. Investigational new drugs.

• Excluded within 30 days prior to study entry:
• Chronic (greater than 7 days) use of drugs known to affect or be extensively metabolized by cytochromes P450, including but not limited to ketoconazole, fluconazole, itraconazole, isoniazid, rifampin, rifabutin, astemizole, terfenadine, or protease inhibitors.

Prior Treatment:

Excluded within 3 weeks prior to study entry:

• Cytotoxic chemotherapy.
• Interferon treatment.
• Radiation therapy.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment

Collaborators and Investigators

• Sponsor: Lexigen Pharmaceuticals

Study record dates

Study Registration Dates

• First Submitted: November 2, 1999
• First Submitted That Met QC Criteria: August 30, 2001
• First Posted (Estimate): August 31, 2001

Study Record Updates

• Last Update Posted (Estimate): June 24, 2005
• Last Update Submitted That Met QC Criteria: June 23, 2005
• Last Verified: July 1, 1998

More Information

Terms related to this study

• Keywords: Reverse Transcriptase Inhibitors; Dose-Response Relationship, Drug
• Additional Relevant MeSH Terms: Pathologic Processes; RNA Virus Infections; Virus Diseases; Blood-Borne Infections; Sexually Transmitted Diseases, Viral; Sexually Transmitted Diseases; Lentivirus Infections; Retroviridae Infections; Immunologic Deficiency Syndromes; Immune System Diseases; Disease Attributes; Slow Virus Diseases; HIV Infections; Infections; Communicable Diseases; Acquired Immunodeficiency Syndrome; Molecular Mechanisms of Pharmacological Action; Anti-Infective Agents; Antiviral Agents; Reverse Transcriptase Inhibitors; Nucleic Acid Synthesis Inhibitors; Enzyme Inhibitors; Anti-HIV Agents; Anti-Retroviral Agents; Capravirine
• Other Study ID Numbers: 286A; 9616T0311; 51,197