Description Module
The Description Module contains narrative descriptions of the clinical trial, including a brief summary and detailed description. These descriptions provide important information about the study's purpose, methodology, and key details in language accessible to both researchers and the general public.
Description Module path is as follows:
Study -> Protocol Section -> Description Module
Description Module
Ignite Creation Date:
2025-12-24 @ 5:24 PM
Ignite Modification Date:
2025-12-24 @ 5:24 PM
NCT ID:
NCT01717950
Brief Summary:
Hookworms digest hemoglobin from erythrocytes for use as an energy source via a proteolytic cascade that begins with the aspartic protease, APR-1. Vaccination with recombinant APR-1 has protected animals from infection in challenge studies. This study will evaluate the safety and immunogenicity of two formulations of Na-APR-1 (M74) in healthy adult volunteers when co-administered with different concentrations of the immunostimulant GLA-AF.
Detailed Description:
Open-label, dose-escalation phase 1 clinical trial in healthy, hookworm-naïve adults:
* Study site: George Washington Medical Faculty Associates, Washington, DC
* Number of participants: 40 in 2 cohorts of 20.
In Cohort 1 five (5) volunteers will receive 30 µg Na-APR-1 (M74) /Alhydrogel®, five (5) will receive 30 µg Na-APR-1 (M74)/Alhydrogel® plus 2.5 µg GLA-AF, and ten (10) will receive 30 µg Na-APR-1 (M74) /Alhydrogel® plus 5 µg GLA-AF. In Cohort 2 five (5) volunteers will receive 100 µg Na-APR-1 (M74)/Alhydrogel®, five (5) will receive 100 µg Na-APR-1 (M74) /Alhydrogel® plus 2.5 µg GLA-AF, and ten (10) will receive 100 µg Na-APR-1 (M74)/Alhydrogel® plus 5 µg GLA-AF.
The cohorts will be enrolled in a staggered fashion with safety data assessed prior to the Na-APR-1 dose escalation from 30 to 100 µg. In addition, within each cohort, vaccinations will be staggered such that formulations containing 0, 2.5, and 5 µg GLA-AF will be tested sequentially: for example, those receiving Na-APR-1 (M74)/Alhydrogel® in combination with 2.5 µg GLA-AF will be vaccinated no sooner than 3 days after the last volunteer is vaccinated with the formulation containing no GLA-AF, whereas those vaccinated with Na-APR-1 (M74)/Alhydrogel® plus 5 µg GLA-AF will be vaccinated no sooner than 7 days after the last one receives the 2.5 µg GLA-AF formulation.
* Immunization schedule: Study days 0, 56 and 112.
* Route: IM in the deltoid muscle.
* Doses of Na-APR-1 (M74) to be tested: 30 and 100 µg.
* Doses of Alhydrogel®: 240 and 800 µg for the 30 and 100 µg doses of Na-APR-1 (M74), respectively.
* Doses of GLA-AF to be tested: 2.5 µg and 5 µg.
* Study duration: 44 weeks (10 months) per study participant; total duration of the study estimated at approximately 13 months.
Study:
NCT01717950
Study Brief:
Protocol Section:
NCT01717950