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Clinical Trial Details — Status: Recruiting

Administrative data

NCT number NCT04073953
Other study ID # PQ Study 3
Secondary ID
Status Recruiting
Phase Phase 1
First received
Last updated
Start date September 1, 2020
Est. completion date September 1, 2022

Study information

Verified date October 2020
Source University of Mississippi, Oxford
Contact Larry Walker, Ph.D.
Phone 662-915-1005
Email lwalker@olemiss.edu
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

This study is a single center, prospective, cross-over phase 1 trial. Eighteen subjects will be enrolled in the study evaluating the metabolism, pharmacokinetic behavior and tolerability of primaquine enantiomers and placebo over the course of 5 days.


Description:

Each subject will receive a 15 mg dose of one enantiomer (SPQ or RPQ or Placebo) daily for up to 5 days, with careful monitoring of hematological parameters before and after each dose. In addition to the general CMP14 safety criteria, any subject who displays a fractional hemoglobin drop of 15% below his/her baseline value, then drug administration will stop (e.g. for baseline Hgb of 14 g/dL, if there is at any point a decrease of 2.1 g/dL). Hematocrit will be similarly monitored, with proportional stop criteria. Elevation in total bilirubin to 2.0 mg/dL or greater will also be used as a stopping criterion. After stopping drug administration (5 days or whenever stop criteria are met), subjects will have a 3-week washout period, and the study repeated with the other enantiomer, and similarly with Placebo.


Recruitment information / eligibility

Status Recruiting
Enrollment 18
Est. completion date September 1, 2022
Est. primary completion date September 1, 2021
Accepts healthy volunteers Accepts Healthy Volunteers
Gender All
Age group 18 Years to 65 Years
Eligibility Inclusion Criteria: - G6PD deficient, otherwise normal healthy adults aged 18 to 65 Exclusion Criteria: - Known history of liver, kidney or hematological disease (other than G6PD deficiency) - Known history of cardiac disease, non-sinus rhythm arrhythmia or QT prolongation - Autoimmune disorders - Report of an active infection - Subject is pregnant or breast-feeding, or is expecting to conceive during the study.

Study Design


Related Conditions & MeSH terms


Intervention

Drug:
RPQ
The study will compare the individual enantiomers of Primaquine -R-(-)-PQ, S-(+)-PQ, and Placebo.
SPQ
The study will compare the individual enantiomers of Primaquine -R-(-)-PQ, S-(+)-PQ, and Placebo.
Placebo
The study will compare the individual enantiomers of Primaquine -R-(-)-PQ, S-(+)-PQ, and Placebo.

Locations

Country Name City State
United States University of Mississippi University Mississippi

Sponsors (3)

Lead Sponsor Collaborator
University of Mississippi, Oxford Southern Research Institute, University of Colorado, Denver

Country where clinical trial is conducted

United States, 

Outcome

Type Measure Description Time frame Safety issue
Primary Change in Methemoglobin concentration in blood from baseline Change in Methemoglobin concentration in blood from baseline (% hemoglobin) Days 0, 3, 5
Secondary Primaquine Plasma Concentration, ng/mL Plasma concentrations of parent drug Days 0, 3, 5
Secondary Carboxy-Primaquine Plasma Contration, ng/mL Plasma concentrations of carboxy-primaquine metabolite Days 0, 3, 5
Secondary Primaquine N-carbamoyl-glucuronide Plasma contration, ng/mL Plasma concentrations of Primaquine N-carbamoyl-glucuronide metabolite Days 0, 3, 5
Secondary Primaquine Orthoquinone Plasma concentration, ng/mL Plasma concentrations of Primaquine Orthoquinone metabolite Days 0, 3, 5
Secondary Change in Hematocrit (%) compared to baseline Change in Hematocrit (%) compared to baseline Days 0, 3, 5
Secondary Change in Hemoglobin (g/dL) compared to baseline Change in Hemoglobin (g/dL) compared to baseline Days 0, 3, 5
Secondary Change is AST (U/L) compared to baseline Change is AST (U/L) compared to baseline; used to monitor liver function Days 0, 3, 5
Secondary Change in ALT (U/L) compared to baseline Change in ALT (U/L) compared to baseline; used to monitor liver function Days 0, 3, 5
Secondary Change in total Bilirubin (mg/dL) compared to baseline Change in total Bilirubin (mg/dL) compared to baseline; used to monitor liver function and red cell integrity Days 0, 3, 5
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