Sponsor
HHSN272201500006I/Foundation for the National Institutes of Health
Published In
Infectious Diseases and Therapy
Document Type
Article
Publication Date
2-2022
Subjects
Malaria -- Prevention -- Research
Abstract
Introduction: There is an urgent need to develop new drugs to treat malaria due to increasing resistance to first-line therapeutics targeting the causative organism, Plasmodium falciparum (P. falciparum). One drug candidate is DM1157, a small molecule that inhibits the formation of hemozoin, which protects P. falciparum from heme toxicity. We describe a first-in-human, phase 1 trial of DM1157 in healthy adult volunteers that was halted early because of significant toxicity.
Methods: Adverse events were summarized using descriptive statistics. We used pharmacokinetic modeling to quantitatively assess whether the DM1157 exposure needed for P. falciparum inhibition was achievable at safe doses.
Results: We found that there was no dose where both the safety and efficacy target were simultaneously achieved; conversely, the model predicted that 27 mg was the highest dosage at which patients would consistently maintain safe exposure with multiple dosing. By pre-defining dose escalation stopping rules and conducting an interim pharmacokinetic/pharmacodynamic analysis, we determined that the study would be unable to safely achieve a dosage needed to observe an anti-malarial effect, thereby providing strong rationale to halt the study.
Conclusion: This study provides an important example of the risks and challenges of conducting early phase research as well as the role of modeling and simulation to optimize participant safety (ClinicalTrials.gov, NCT03490162).
Rights
Copyright (c) 2022 The Authors
This work is licensed under a Creative Commons Attribution 4.0 International License.
Locate the Document
DOI
10.1007/s40121-022-00605-z
Persistent Identifier
https://archives.pdx.edu/ds/psu/37113
Citation Details
Balevic, S. J., Raja, S. M., Randell, R., Deye, G. A., Conrad, T., Nakamura, A., ... & Guptill, J. T. (2022). Adverse Reactions in a Phase 1 Trial of the Anti-Malarial DM1157: An Example of Pharmacokinetic Modeling and Simulation Guiding Clinical Trial Decisions. Infectious Diseases and Therapy, 1-12.