<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Oil-in-water nanoemulsions (NEs) represent one of the formulation approaches to improve eye-related bio-availability of lipophilic drugs. The potential of cationic NEs is pronounced due to the electrostatic interaction of positively charged droplets with negatively charged mucins present in the tear film, providing prolonged formulation residence at the ocular surface. The aim of this study was to develop a cationic ophthalmic NE with cationic lipid stearylamine (SA) as a carrier of a positive charge. The addition of a nonionic surfactant provided the dual electro-steric stabilization of NEs and enabled tuning of SA concentration to achieve an optimal balance between its interaction with mucins and biocompatibility. Physicochemical characterization, stability profile, <italic>in vitro</italic> mucoadhesion study and biocompatibility study employing 3D HCE-T cell-based model of corneal epithelium pointed out the NE with 0.05 % (<italic>m/m</italic>) SA as the leading formulation. Minimizing SA content while retaining droplet/mucin interactions is of great importance for efficacy and safety of future ophthalmic drug products.</p></abstract>

Oil-in-water nanoemulsions (NEs) represent one of the formulation approaches to improve eye-related bio-availability of lipophilic drugs. The potential of cationic NEs is pronounced due to the electrostatic interaction of positively charged droplets with negatively charged mucins present in the tear film, providing prolonged formulation residence at the ocular surface. The aim of this study was to develop a cationic ophthalmic NE with cationic lipid stearylamine (SA) as a carrier of a positive charge. The addition of a nonionic surfactant provided the dual electro-steric stabilization of NEs and enabled tuning of SA concentration to achieve an optimal balance between its interaction with mucins and biocompatibility. Physicochemical characterization, stability profile, in vitro mucoadhesion study and biocompatibility study employing 3D HCE-T cell-based model of corneal epithelium pointed out the NE with 0.05 % (m/m) SA as the leading formulation. Minimizing SA content while retaining droplet/mucin interactions is of great importance for efficacy and safety of future ophthalmic drug products.

<italic>In vitro</italic> evaluation of stearylamine cationic nanoemulsions for improved ocular drug delivery

Faculty of Pharmacy and Biochemistry, Department of Pharmaceutical Technology

Acta Pharmaceutica

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

 evaluation of stearylamine cationic nanoemulsions for improved ocular drug delivery

Oil-in-water nanoemulsions (NEs) represent one of the formulation approaches to improve eye-related bio-availability of lipophilic drugs. The potential of...

In vitro evaluation of stearylamine cationic nanoemulsions for improved ocular drug delivery

Published Online: Oct 21, 2019

Page range: 621 - 634

Accepted: Jul 10, 2019

DOI: https://doi.org/10.2478/acph-2019-0054

Keywords
cationic nanoemulsions, stearylamine, ophthalmic drug delivery, biocompatibility, mucoadhesion

© 2019 Bisera Jurišić Dukovski et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

In vitro evaluation of stearylamine cationic nanoemulsions for improved ocular drug delivery

Published Online: Oct 21, 2019

Page range: 621 - 634

Accepted: Jul 10, 2019

DOI: https://doi.org/10.2478/acph-2019-0054

Keywordscationic nanoemulsions, stearylamine, ophthalmic drug delivery, biocompatibility, mucoadhesion

© 2019 Bisera Jurišić Dukovski et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
cationic nanoemulsions, stearylamine, ophthalmic drug delivery, biocompatibility, mucoadhesion