Abstract
Herein, carboxymethyl chitosan (CMC) grafted lipid nanoformulations were facilely prepared by thin-film hydration method as a highly efficient biocompatible anti-leishmanial carrier encapsulating amphotericin B (AmB). Nanoformulations were characterized for their physicochemical characteristics wherein TEM analysis confirmed the spherical structure, whereas FTIR analysis revealed the conjugation of CMC onto nanoformulations and confirmed the free state of AmB. Furthermore, the wettability study confirmed the presence of CMC on the surface of nanoformulations attributed to the enhanced hydrophilicity. Surface hydrophilicity additionally contributes towards consistent mucin retention ability for up to 6 h, superior mucoadhesiveness, and hence enhanced bioavailability. The proposed nanoformulations with high encapsulation and drug loading properties displayed controlled drug release in the physiological microenvironment. In vitro, antileishmanial results showed an astounding 97% inhibition in amastigote growth. Additionally, in vivo studies showed that treatment with nanoformulations significantly reduced the liver parasitic burden (93.5%) without causing any toxicity when given orally.
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