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Building a Better Mosquito: Identifying the Genes Enabling Malaria and Dengue Fever Resistance in A. gambiae and A. aegypti Mosquitoes
Published on: July 4, 2007
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ELQ-331 as a prototype for extremely durable chemoprotection against malaria.
Martin J Smilkstein1, Sovitj Pou2, Alina Krollenbrock3
1VA Portland Health Care System Research and Development Service, 3710 SW US Veterans Hospital Road, RD-33, Portland, OR, 97239, USA. smilkste@ohsu.edu.
Malaria Journal
|August 29, 2019
Summary
Long-acting injectable chemoprotection (LAI-C) shows promise for malaria prevention. ELQ-331, a novel drug, provided sustained protection in mice for over 4 months, suggesting its potential for malaria LAI-C.
Area of Science:
- Pharmacology
- Infectious Diseases
- Drug Development
Background:
- Long-acting injectable chemoprotection (LAI-C) is emerging as a vital strategy for malaria prevention.
- ELQ-331, a prodrug of ELQ-300, was investigated for its potential as an LAI-C agent due to its favorable pharmacokinetic and pharmacodynamic properties.
Purpose of the Study:
- To evaluate the pharmacokinetics and efficacy of ELQ-331 as a long-acting injectable chemoprotection (LAI-C) against malaria in a mouse model.
- To determine the duration of protective effect and safety profile of ELQ-331 following a single intramuscular injection.
Main Methods:
- Four trials involving single intramuscular injections of ELQ-331 and other ELQ-300 prodrugs in mice.
- Efficacy assessed via challenge with Plasmodium yoelii sporozoites and whole-body live animal imaging.
- Pharmacokinetic analysis of ELQ-331 and ELQ-300 plasma concentrations over time.
Main Results:
- A single dose of ELQ-331 protected mice against P. yoelii sporozoite challenge for at least 4.5 months.
- ELQ-331 demonstrated rapid conversion to ELQ-300, achieving sustained therapeutic concentrations for 4-5 months.
- Pharmacokinetic modeling revealed a tissue compartment facilitating slow redistribution of ELQ-300, maintaining protective levels.
Conclusions:
- ELQ-331 shows significant potential to meet and exceed current duration-of-effect goals for anti-malarial LAI-C.
- The unique pharmacokinetic profile of ELQ-300 derived from ELQ-331 may offer durable malaria protection.
- ELQ-331 is a promising candidate for further development as a leading anti-malarial LAI-C agent.
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