Title

Sustained Inhibition Of Neovascularization In Vldlr-/- Mice Following Intravitreal Injection Of Cerium Oxide Nanoparticles And The Role Of The Ask1-P38/Jnk-Nf-Κb Pathway

Keywords

Nanoceria; Neovascularization; Retinal degeneration; Signal transduction; Vldlr mouse -/-

Abstract

Cerium oxide nanoparticles (nanoceria) are direct antioxidants; they inhibit pathological neovascularization following a single intravitreal injection into new born very low density lipoprotein receptor knockout (vldlr-/-) mice. However, the long-term therapeutic effects and mechanisms of nanoceria action on regression of the existing pathologic neovascularization in the eyes are unknown. We intravitreally injected P28 vldlr-/- mice and extended the endpoint for analysis until P70. The data demonstrate that nanoceria sustained their therapeutic function up to 6 weeks. Multiple parameters for nanoceria effects were examined including: regression of existing abnormal blood vessels, reduction of vascular leakage, down-regulation of the expression of vascular endothelial growth factor (VEGF), acrolein, glial fibrillary acidic protein (GFAP) and caspase 3 as well as up-regulation of the expression of rod- and cone-opsin genes. Regulation of ASK1-P38/JNK-NF-κB signaling pathway by nanoceria was investigated. Our data demonstrated that a single intravitreal injection of nanoceria in P28 vldlr-/- mice produced sustained regression of existing oxidative stress-induced neovascularizations, prevented blood vessel leakage and inhibited apoptosis via down-regulation of the ASK1-P38/JNK-NF-κB signaling pathway. © 2013 Elsevier Ltd.

Publication Date

1-1-2014

Publication Title

Biomaterials

Volume

35

Issue

1

Number of Pages

249-258

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.biomaterials.2013.10.022

Socpus ID

84887025605 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84887025605

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