Near-Infrared Switchable Fullerene-Based Synergy Therapy for Alzheimer's Disease

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Zhi DuXiaogang Qu

Abstract

C60 has a special dual function; it can act as both a powerful reactive oxygen species (ROS) producer under UV or visible light and an ROS scavenger in the dark. However, ROS has double-edged effects in living systems. It is still a great challenge for biomedical application to switch and adjust the two opposite properties of C60 in one system. Herein, UCNP@C60 -pep (UCNP: upconversion nanoparticle, pep: Aβ-target peptide KLVFF) is designed as a near-infrared-switchable nanoplatform for synergy therapy of Alzheimer's disease (AD). Under near-infrared (NIR) light, the Aβ-targeting hybrid nanoparticles produce ROS and result in Aβ photooxygenation, which can hinder Aβ aggregation and mitigate the attendant cytotoxicity. In the dark, UCNP@C60 -pep shows protective effects against the increased oxidative stress. The ROS-generating and ROS-quenching abilities of UCNP@C60 -pep are both beneficial for decreasing Aβ-induced neurotoxicity and extending the longevity of the commonly used transgenic AD model Caenorhabditis elegans CL2006. Moreover, UCNP@C60-pep can also be used for upconversion luminescence (UCL) and magnetic resonance imaging (MRI), which has benefits for "image-guided therapy." This study may offer a new perspective for...Continue Reading

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Jul 23, 2019·Advanced Materials·Bowen YangJianlin Shi
May 24, 2019·Chemical Society Reviews·Dawei JiangWeibo Cai
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