Synergistically dual-functional nano eye-drops for simultaneous anti-inflammatory and anti-oxidative treatment of dry eye disease

Nanoscale. 2019 Mar 21;11(12):5580-5594. doi: 10.1039/c9nr00376b.

Abstract

We have developed a rapid and straightforward topical treatment method for dry eye disease (DED) using poly(catechin) capped-gold nanoparticles (Au@Poly-CH NPs) carrying amfenac [AF; a nonsteroidal anti-inflammatory drug (NSAID)] through effective attenuation of ocular surface tissue damage in dry eyes. A dual-targeted strategy based on ocular therapeutics was adopted to simultaneously block the cyclooxygenase enzymes-induced inflammation and reactive oxygen species (ROS)-induced oxidative stress, the primary two causes of DED. The self-assembled core-shell Au@Poly-CH NPs synthesized via a simple reaction between tetrachloroaurate(iii) and catechin possess a poly(catechin) shell (∼20 nm) on the surface of each Au NP (∼60 nm). The anti-oxidant and anti-inflammatory properties of AF/Au@Poly-CH NPs were evaluated by DCFH-DA and prostaglandin E2/VEGF assays, respectively. Our results demonstrate that Au@Poly-CH NPs not only act as an anti-oxidant to suppress ROS-mediated processes, but also serve as a drug carrier of AF for a synergistic effect on anti-inflammation. In vivo biocompatibility studies show good tolerability of AF/Au@Poly-CH NPs for potential use in the treatment of ocular surface pathologies. The dual-targeted therapeutic effects of AF/Au@Poly-CH NPs lead to rapid recovery from DED in a rabbit model. Au@Poly-CH NPs loaded with NSAIDs is a promising multifunctional nanocomposite for treating various inflammation- and oxidative stress-related diseases.

MeSH terms

  • Animals
  • Anti-Inflammatory Agents / chemistry*
  • Anti-Inflammatory Agents / pharmacology
  • Anti-Inflammatory Agents / therapeutic use
  • Antioxidants / chemistry*
  • Biocompatible Materials / chemistry
  • Catechin / chemistry
  • Cell Line
  • Cornea / cytology
  • Cornea / metabolism
  • Cornea / pathology
  • Drug Liberation
  • Dry Eye Syndromes / drug therapy
  • Dry Eye Syndromes / pathology
  • Gold / chemistry
  • Metal Nanoparticles / chemistry*
  • Microscopy, Fluorescence
  • Mucin 5AC / metabolism
  • Ophthalmic Solutions / chemistry
  • Ophthalmic Solutions / pharmacology
  • Ophthalmic Solutions / therapeutic use
  • Oxidative Stress / drug effects
  • Phenylacetates / chemistry
  • Phenylacetates / pharmacology
  • Phenylacetates / therapeutic use
  • Prostaglandin-Endoperoxide Synthases / chemistry
  • Prostaglandin-Endoperoxide Synthases / metabolism
  • Rabbits
  • Reactive Oxygen Species / metabolism
  • Vascular Endothelial Growth Factor A / metabolism

Substances

  • Anti-Inflammatory Agents
  • Antioxidants
  • Biocompatible Materials
  • Mucin 5AC
  • Ophthalmic Solutions
  • Phenylacetates
  • Reactive Oxygen Species
  • Vascular Endothelial Growth Factor A
  • amfenac
  • Gold
  • Catechin
  • Prostaglandin-Endoperoxide Synthases