Increased Body Exposure to New Anti-Trypanosomal Through Nanoencapsulation.

Abstract

Lychnopholide, a lipophilic sesquiterpene lactone, is efficacious in mice at the acute and chronic phases of Chagas disease. Conventional poly-ε-caprolactone (PCL) and long-circulating poly(D,L-lactide)-block-polyethylene glycol (PLA-PEG) nanocapsules containing lychnopholide were developed and characterized. Lychnopholide presented high association efficiency (>90%) with the nanocapsules. A new, fast and simple HPLC-UV-based bioanalytical method was developed, validated in mouse plasma and applied to lychnopholide quantification in in vitro release kinetics and pharmacokinetics. The nanocapsules had mean hydrodynamic diameters in the range of 100-250 nm, negative zeta potentials (-30 mV to -57 mV), with good physical stability under storage. Atomic force microscopy morphological analysis revealed spherical monodispersed particles and the absence of lychnopholide crystallization or aggregation. Association of lychnopholide to PLA-PEG nanocapsules resulted in a 16-fold increase in body exposure, a 26-fold increase in plasma half-life and a dramatic reduction of the lychnopholide plasma clearance (17-fold) in comparison with free lychnopholide. The improved pharmacokinetic profile of lychnopholide in long-circulating nanocapsules is in agreement with the previously reported improved efficacy observed in Trypanosoma cruzi-infected mice. The present lychnopholide intravenous dosage form showed great potential for further pre-clinical and clinical studies in Chagas disease and cancer therapies.

• Authors: Renata Tupinambá Branquinho, Gwenaelle Pound-Lana, Matheus Marques Milagre, Dênia Antunes Saúde-Guimarães, José Mário Carneiro Vilela, Margareth Spangler Andrade, Marta de Lana, Vanessa Carla Furtado Mosqueira
• Journal: Scientific reports (Sci Rep) Vol. 7 Issue 1 Pg. 8429 (08 16 2017) ISSN: 2045-2322 [Electronic] England
• PMID: 28814794 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Lactones
• Polyesters
• Sesquiterpenes
• Trypanocidal Agents
• lychnopholide
• monomethoxypolyethyleneglycol-polylactide block copolymer
• polycaprolactone
• Polyethylene Glycols

Topics

• Administration, Intravenous
• Animals
• Chromatography, High Pressure Liquid
• Drug Compounding (methods)
• Drug Liberation
• Drug Stability
• Drug Storage
• Female
• Lactones (administration & dosage, analysis, pharmacokinetics)
• Mice
• Microscopy, Atomic Force
• Nanostructures (administration & dosage, chemistry)
• Polyesters (chemistry)
• Polyethylene Glycols (chemistry)
• Reproducibility of Results
• Sesquiterpenes (administration & dosage, analysis, pharmacokinetics)
• Trypanocidal Agents (administration & dosage, analysis, pharmacokinetics)