Improvising anti-leishmanial activity of Amphotericin B and Paromomycin using co-delivery in D-α-tocopheryl polyethylene glycol 1000 succinate (TPGS) tailored Nano-lipid carrier system

Abstract In the current study, we have focused on the design, development and in-vitro evaluation of D-α-tocopheryl polyethylene glycol 1000 succinate modified amphotericin B (AmB) and paromomycin (PM) loaded solid lipid nanoparticles (TPGS-SLNPs) by emulsion-solvent evaporation method. The optimized TPGS-SLNPs had a mean particle size of 199.4 ± 18.9 nm with a polydispersity index of 0.22 ± 0.14 and entrapment efficiency for AmB and PM was found to be 94 ± 1.5 % and 89 ± 0.50 % respectively. The prepared lipid nanoparticles were characterized by Powdered X-ray diffraction study, Fourier transform infrared spectroscopy, Nuclear magnetic resonance spectroscopy to confirm the absence of any interaction between lipids and drugs. The developed formulation showed a sustained drug release over a period of 48 hr and were stable at different temperatures. Finally, TPGS-SLNPs (1 µg/ml) was found to significantly (P