Neurotrophin-conjugated nanoparticles prevent retina damage induced by oxidative stress

Cellular and Molecular Life Sciences : CMLS
Martina GiannacciniVittoria Raffa

Abstract

Glaucoma and other optic neuropathies are characterized by a loss of retinal ganglion cells (RGCs), a cell layer located in the posterior eye segment. Several preclinical studies demonstrate that neurotrophins (NTs) prevent RGC loss. However, NTs are rarely investigated in the clinic due to various issues, such as difficulties in reaching the retina, the very short half-life of NTs, and the need for multiple injections. We demonstrate that NTs can be conjugated to magnetic nanoparticles (MNPs), which act as smart drug carriers. This combines the advantages of the self-localization of the drug in the retina and drug protection from fast degradation. We tested the nerve growth factor and brain-derived neurotrophic factor by comparing the neuroprotection of free versus conjugated proteins in a model of RGC loss induced by oxidative stress. Histological data demonstrated that the conjugated proteins totally prevented RGC loss, in sharp contrast to the equivalent dose of free proteins, which had no effect. The overall data suggest that the nanoscale MNP-protein hybrid is an excellent tool in implementing ocular drug delivery strategies for neuroprotection and therapy.

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Citations

Nov 28, 2019·Expert Opinion on Drug Delivery·Giovanni TosiJörg Kreuter
Jun 6, 2020·Molecular Pharmaceutics·Qingqing LiShing Fung Chow
Nov 1, 2020·International Journal of Molecular Sciences·Sara De VincentiisVittoria Raffa
Apr 4, 2021·Cells·Salvatore L StellaStephanie L Grillo

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Methods Mentioned

BETA
dynamic light scattering

Clinical Trials Mentioned

NCT02862938
NCT01530659
NCT03071965
NCT01544192
NCT01409694

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