Biodegradable nanoparticles improve oral bioavailability of Amphotericin B and shows reduced nephrotoxicity against intravenous Fungizone®

J.L. Italia, M.M. Yahya, D. Singh, M.N.V. Ravi Kumar

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Abstract

Amphotericin B (AMB), an effective antifungal and antileishmanial agent associated with low oral bioavailability (0.3%) and severe nephrotoxicity, was entrapped into poly(lactide-co-glycolide) (PLGA) nanoparticles to improve the oral bioavailability and to minimize the adverse effects associated with it. The AMB-nanoparticles (AMB-NP) were prepared by nanoprecipitation method employing Vitamin E-TPGS as a stabilizer. In vitro release was carried out using membrane dialysis method. The in vitro hemolytic activity of AMB-NP was evaluated by incubation with red blood cells (RBCs). The acute nephrotoxicity profile and oral bioavailability of AMB-NP were evaluated in rats. The prepared AMB-NP formulation contained monodispersed particles in the size range of 165.6 ± 2.9 nm with 34.5 ± 2.1% entrapment at 10% w/w initial drug loading. AMB-NP formulation showed biphasic drug release, an initial rapid release followed by a sustained release. The AMB-NP formulation exerted lower hemolysis and nephrotoxicity as compared to Fungizone®. The relative oral bioavailability of the AMB-NP was found to be ∼800% as compared to Fungizone®. Together, these results offer a possibility of treating systemic fungal infection and leishmaniasis with oral AMB-NP, which could revolutionize the infectious disease treatment modalities.
Original languageEnglish
Pages (from-to)1324-1331
Number of pages7
JournalPharmaceutical Research
Volume26
Issue number6
DOIs
Publication statusPublished - 2009

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Keywords

  • amphotericin B
  • bioavailability
  • biodegradable
  • nephrotoxicity
  • oral delivery
  • pharmacology

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