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Chitosan oligosaccharide enhances binding of nanostructured lipid carriers to ocular mucins: Effect on ocular disposition.

Abstract：

:The objective of the study was to assess the effect of enhanced mucoadhesion of a cationic mucoadhesive nanostructured lipid carrier (NLC) on its ocular disposition after topical administration. The NLC was made mucoadhesive by surface coating with chitosan oligosaccharide (COS), a low molecular weight derivate of chitosan which is more suitable for drug delivery applications as compared to the native chitosan. The NLC was characterised by surface evaluating techniques like SANS and XPS for confirming coating of COS over the surface of NLC. In order to assess the effect of COS coating on in vivo ocular mucoadhesion, coumarin loaded NLC were topically administered to rats and the sagittal sections of the eyes were imaged using confocal microscopy. The COS coated NLC were seen to adhere more around the ocular surface than the uncoated NLC during the 4-h study. The improved ocular retention for COS-NLC reflected on the content of Etoposide within the eye, which showed a higher concentration of Etoposide, as compared to the uncoated NLC. The NLC was also assessed for any ocular irritancy in rabbits and repeat dose toxicity in rats and found to be relatively non-irritant and non-toxic as compared to appropriate controls. Thus, the study asserts that to achieve higher concentration of therapeutics within the eye, the formulations like NLC are not just required to be permeating but also retentive on the surface of the eye to achieve appreciable concentrations.

journal_name

Int J Pharm

journal_title

International journal of pharmaceutics

authors

Pai RV,Vavia PR

doi

10.1016/j.ijpharm.2020.119095

subject

Has Abstract

pub_date

2020-03-15 00:00:00

pages

119095

eissn

0378-5173

issn

1873-3476

pii

S0378-5173(20)30079-X

journal_volume

577

pub_type

杂志文章

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