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Updated: Aug 22, 2025
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Isolation and Analysis of Traceable and Functionalized Extracellular Vesicles from the Plasma and Solid Tissues
Published on: October 17, 2022
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pSILAC-Based Determination of Cellular Protein Sorting into Extracellular Vesicles
So-Fong Cam Ngan1, Neil E McCarthy2, Siu Kwan Sze3
1Department of Health Sciences, Brock University, St Catharines, ON, Canada.
Methods in Molecular Biology (Clifton, N.J.)
|November 12, 2022
Summary
Extracellular vesicles (EVs) carry proteins that affect cell communication. Understanding how environmental cues alter EV protein loading is key to studying intercellular communication.
Area of Science:
- Cell Biology
- Biochemistry
- Molecular Biology
Background:
- Extracellular vesicles (EVs) are crucial mediators of intercellular communication.
- The protein composition of EVs dictates their function and impact on recipient cells.
- EV protein loading is influenced by environmental cues through various cellular pathways.
Purpose of the Study:
- To investigate how environmental stimuli influence protein sorting into EVs.
- To understand the dynamic origins of EV protein cargo.
- To provide insights into EV biology and intercellular communication.
Main Methods:
- Utilized stable isotope labeling by amino acids in cell culture (SILAC) techniques.
- Employed pulsed SILAC (pSILAC) to trace protein origins within EVs.
- Analyzed protein sorting mechanisms under defined stimuli.
Main Results:
- Demonstrated that environmental cues can alter EV protein content.
- Identified distinct pathways contributing to EV protein loading (endocytosis, cytosolic pool, trans-Golgi network).
- pSILAC effectively traced the dynamic sourcing of EV proteins.
Conclusions:
- Environmental stimuli significantly modulate the protein cargo of extracellular vesicles.
- Understanding EV protein sorting pathways is essential for deciphering intercellular communication.
- pSILAC is a valuable tool for studying EV biogenesis and function.
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