nanodisk containing super aggregated amphotericin b: a high therapeutic index antifungal formulation with enhanced potency
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2013
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Abstract
Braydon L Burgess,1,2 Yumin He,1 Mandie M Baker,1,2 Bing Luo,2 Stephen F Carroll,2 Trudy M Forte,2 Michael N Oda11Children's Hospital Oakland Research Institute, Oakland, CA, USA; 2Lypro Biosciences, Berkeley, CA, USAObjectives: NanoDisk–amphotericin B (ND-AMB) is a protein-phospholipid bioparticle containing a “super aggregate” form of antifungal AMB. While lipid-based formulations of AMB, including liposomal AMB (L-AMB), are safer than the deoxycholate (DOC) solubilized form (DOC-AMB), the potency of lipid-based formulations is attenuated. We have developed an AMB-based therapy that is both well tolerated and fully efficacious.Methods: Potency was determined using broth culture growth-inhibition assays and candidacidal kinetics by quantitative culture plating. Toxicology studies were performed in healthy mice. Efficacy was assessed using both immune-competent and leukopenic murine models of systemic Candida albicans infection.Results: ND-AMB C. albicans and Aspergillus fumigatus minimum inhibitory concentrations were fourfold and sixfold lower, respectively, than that observed for L-AMB. ND-AMB exhibited candidacidal activity at 0.125 mg/L, 16-fold lower than L-AMB. In mice, ND-AMB produced no statistically significant kidney or liver toxicity at 15 mg/kg, the highest dose tested. When evaluated in immune-competent mice infected with C. albicans, ND-AMB was at least as effective as DOC-AMB or L-AMB. In a leukopenic model of candidiasis, the 50% effective dose of ND-AMB was around threefold lower than L-AMB.Conclusion: These results indicate that ND-AMB exhibits a more favorable safety profile while maintaining uncompromised antifungal properties compared to both DOC-AMB and L-AMB. ND-AMB is a promising therapy for the treatment of invasive fungal infections.Keywords: nanoparticles, infectious diseases, drug delivery, candidiasis, apolipoprotein A-I
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bl2013internationalnanodisk
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| Authors | ;Burgess BL;He Y;Baker MM;Luo B;Carroll SF;Forte TM;Oda MN |
| Journal | nonlinear analysis: real world applications |
| Year | 2013 |
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