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Microscale Vortex-assisted Electroporator for Sequential Molecular Delivery
Published on: August 7, 2014
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Atovaquone oral bioavailability enhancement using electrospraying technology.
Aditya Darade1, Sulabha Pathak2, Shobhona Sharma2
1Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, N.P. Marg, Matunga, Mumbai 400019, India.
Summary
This study developed atovaquone nanoparticles for malaria treatment, significantly improving bioavailability and reducing the required dose compared to existing medications. The new formulation enhances therapeutic efficacy and patient compliance while minimizing side effects.
Area of Science:
- Pharmaceutical Sciences
- Nanotechnology
- Malaria Therapeutics
Background:
- Atovaquone, used with proguanil hydrochloride for malaria, faces challenges with high dosage requirements and poor oral bioavailability.
- Existing treatments like Malarone® tablets and Mepron® suspension have limitations in efficacy and patient adherence.
Purpose of the Study:
- To develop and characterize atovaquone nanoparticles using electrospraying technology.
- To evaluate the enhanced bioavailability and therapeutic efficacy of the novel atovaquone nanoparticle formulation.
- To compare the nanoparticle formulation against Malarone® tablets and Mepron® suspension.
Main Methods:
- Atovaquone nanoparticles were fabricated using custom-designed electrospraying equipment.
- Nanoparticles were characterized for physical properties (particle size, flow), thermal analysis (DSC), crystallinity (XRD), and chemical structure (FTIR).
- In vitro release, in vivo pharmacokinetic studies in rats, and therapeutic efficacy tests in Plasmodium berghei-infected mice were conducted.
Main Results:
- Electrospraying successfully produced solid atovaquone nanoparticles with favorable characteristics.
- The nanoparticle formulation demonstrated 2.9-fold and 1.8-fold improved bioavailability in rats compared to Malarone® and Mepron®, respectively.
- Significant dose reductions (128-fold and 32-fold) were observed in efficacy studies, with improved therapeutic outcomes.
Conclusions:
- The developed atovaquone nanoparticle formulation offers a promising alternative for malaria treatment due to enhanced bioavailability and efficacy.
- The reduced dosage and improved compliance potential of the nanoparticle formulation could lead to fewer side effects and better patient outcomes.
- Electrospraying is a viable method for producing effective nanoparticle drug delivery systems for antimalarial agents.
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