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Updated: Jun 8, 2025
Extraction of Extracellular Vesicles from Whole Tissue
Published on: February 7, 2019
Isolation and Comprehensive Analysis of Cochlear Tissue-Derived Small Extracellular Vesicles.
Pei Jiang1,2, Xiangyu Ma1, Xinlin Wang1
1State Key Laboratory of Digital Medical Engineering, Department of Otolaryngology Head and Neck Surgery, Zhongda Hospital, School of Life Sciences and Technology, Advanced Institute for Life and Health, Jiangsu Province High-Tech Key Laboratory for Bio-Medical Research, Southeast University, Nanjing, 210096, China.
Researchers optimized methods for isolating cochlear tissue-derived small extracellular vesicles (sEVs). These vesicles contain crucial molecules for hearing, with FGFR1 potentially protecting cochlear hair cells.
Area of Science:
- Otolaryngology
- Cell Biology
- Extracellular Vesicles
Background:
- Small extracellular vesicles (sEVs) are key mediators of intercellular communication.
- Tissue-derived sEVs offer more accurate in vivo signaling insights than in vitro sources.
- Previous cochlear sEV research primarily used in vitro models.
Purpose of the Study:
- To evaluate and optimize methods for isolating cochlear tissue-derived sEVs (CDsEVs).
- To comprehensively analyze the molecular contents and cellular origins of CDsEVs.
- To investigate the role of CDsEVs in maintaining auditory function.
Main Methods:
- Evaluated three cochlear tissue digestion and CDsEV isolation techniques.
- Optimized isolation using collagenase D, DNase I, and sucrose density gradient centrifugation.
- Performed small RNA sequencing and proteomics on CDsEVs; utilized single-cell RNA sequencing for origin tracing.
Main Results:
- Identified an optimal method for isolating CDsEVs.
- Revealed that CDsEVs contain miRNAs and proteins vital for auditory function.
- FGFR1 within CDsEVs may support cochlear hair cell survival.
- Kölliker's organ cells and supporting cells were identified as major contributors to CDsEV secretion.
Conclusions:
- Established an effective method for isolating cochlear tissue-derived sEVs.
- Demonstrated the significance of CDsEVs and their molecular cargo in auditory health.
- Provided insights into the cellular origins of cochlear sEVs, enhancing understanding of cochlear biology.
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