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Isolating Astrocyte-Derived Extracellular Vesicles From Urine
Xin-Hui Xie1, Mian-Mian Chen1, Shu-Xian Xu1
1Department of Psychiatry, Renmin Hospital of Wuhan University, Wuhan, Hubei, People's Republic of China.
International Journal of Nanomedicine
|March 3, 2025
Summary
Researchers developed a non-invasive method to isolate astrocyte-derived extracellular vesicles from urine. This technique allows for frequent sampling to study central nervous system diseases without invasive procedures.
Area of Science:
- Neuroscience
- Biochemistry
- Biotechnology
Background:
- Brain-derived extracellular vesicles (BDEVs) circulate in the periphery, offering insights into central nervous system (CNS) pathobiology.
- Current methods for BDEV analysis often require invasive procedures like daily venipuncture, which is unfeasible for studying rapidly evolving CNS diseases.
Purpose of the Study:
- To develop a novel, non-invasive method for isolating astrocyte-derived extracellular vesicles from urine (uADEVs).
- To enable high-frequency sampling for monitoring CNS pathobiology in vivo.
Main Methods:
- Urine concentration and ultracentrifugation were used to isolate total extracellular vesicles (EVs).
- Glutamate-aspartate transporter (GLAST) positive EVs were isolated using an anti-GLAST antibody, yielding uADEVs.
Main Results:
- The identity of GLAST+EVs as uADEVs was confirmed through transmission electron microscopy and nanoparticle tracking analysis.
- Western blotting and assessment of astrocyte-related neurotrophins further validated the isolated uADEVs.
Conclusions:
- The non-invasive uADEV approach provides a convenient and accessible tool for high-frequency sampling.
- This method facilitates the investigation of rapidly evolving CNS diseases by analyzing peripherally circulating BDEVs.
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