Oral administration of amphotericin B nanoparticles: antifungal activity, bioavailability and toxicity in rats

Drug Delivery

Mahasen A. Radwan¹  Bushra T. AlQuadeib²  Matthew C. Wright³  Lidija Šiller⁴  Benjamin Horrocks⁴ 

[1] Department of Pharmaceutical Practice, College of Pharmacy, Princess Nourah bint Abdelrahman University, Riyadh, Saudi Arabia;Department of Pharmaceutics and Pharmaceutical Technology, College of Pharmacy, Egyptian Russian University, Bader City, Egypt;Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia;Institute of Cellular Medicine, Leech Building, Medical School, Newcastle University, Newcastle upon Tyne, U;School of Chemical Engineering and Advanced Materials, Herschel Building, Newcastle University, Newcastle upon Tyne, UK, an;

关键词: Amphotericin B;    oral delivery;    nanoparticles;    bioavailability;    PLGA-PEG;    efficacy;    nephrotoxicity;   

DOI  :  10.1080/10717544.2016.1228715

来源: Taylor & Francis

【 摘 要 】

Amphotericin B (AMB) is used most commonly in severe systemic life-threatening fungal infections. There is currently an unmet need for an efficacious (AMB) formulation amenable to oral administration with better bioavailability and lower nephrotoxicity. Novel PEGylated polylactic-polyglycolic acid copolymer (PLGA-PEG) nanoparticles (NPs) formulations of AMB were therefore studied for their ability to kill Candida albicans (C. albicans). The antifungal activity of AMB formulations was assessed in C. albicans. Its bioavalability was investigated in nine groups of rats (n = 6). Toxicity was examined by an in vitro blood hemolysis assay, and in vivo nephrotoxicity after single and multiple dosing for a week by blood urea nitrogen (BUN) and plasma creatinine (PCr) measurements. The MIC of AMB loaded to PLGA-PEG NPs against C. albicans was reduced two to threefold compared with free AMB. Novel oral AMB delivery loaded to PLGA-PEG NPs was markedly systemically available compared to Fungizone® in rats. The addition of 2% of GA to the AMB formulation significantly (p < 0.05) improved the bioavailability from 1.5 to 10.5% and the relative bioavailability was > 790% that of Fungizone®. The novel AMB formulations showed minimal toxicity and better efficacy compared to Fungizone®. No nephrotoxicity in rats was detected after a week of multiple dosing of AMB NPs based on BUN and PCr, which remained at normal levels. An oral delivery system of AMB-loaded to PLGA-PEG NPs with better efficacy and minimal toxicity was formulated. The addition of glycyrrhizic acid (GA) to AMB NPs formulation resulted in a significant oral absorption and improved bioavailability in rats.

【 授权许可】

CC BY