Peter MuReading Journal

February 16, 2024

Bio-Clickable, Small Extracellular Vesicles-Cocktail Therapy for Ischemic Stroke
生物可点击的细胞外小泡-缺血性卒中的鸡尾酒疗法

Bio-Clickable, Small Extracellular Vesicles-Cocktail Therapy for Ischemic Stroke 生物可点击的细胞外小泡-缺血性卒中的鸡尾酒疗法

sciencedirect.com

First, we confirmed the *in vitro* cytocompatibility by incubating sEV formulations (NR2B9c Conc, 25, 50, 100, 200 nM) with primary neurons.

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sEV cellular internalization was first studied in Neuro-2a cells

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RVG29 conjugation increased the cellular uptake characteristics of sEVs compared with naïve sEVs

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RVG29 is the only rabies virus protein that attaches to the *N*-acetyl choline receptor [[46](https://www.sciencedirect.com/science/article/pii/S0168365923006533?via%3Dihub=#bb0230)] abundantly present on neuron

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confirm the neuron targeting potential of RVG-sEVs

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click chemistry technique effectively conjugates RVG29 to sEVs surface, resulting in efficient sEV neurons targeting.

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Near-infrared [fluorescent dye](https://www.sciencedirect.com/topics/pharmacology-toxicology-and-pharmaceutical-science/fluorescent-dye), DiR labeled free sEVs, RVG-sEVs, and free DiR were i.v. injected to track sEVs *in vivo* and *ex vivo* in tMCAO mice using *In Vivo* Imaging system (IVIS).

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sEVs based brain targeted cargo delivery system

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delivery of neuroprotective peptide (NR2B9c) to the brain, overcoming BBB, targeting neurons, increased biodistribution, and bioavailability.

4:53 AM

We engineered sEVs with neuron-targeting peptide RVG29 *via* click reactions and used them for specific delivery of NR2B9c with higher efficiency to ischemic neurons for prevention of excessive ROS production during brain ischemia

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