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TEMIS: A temperature-controlled microwave irradiation system for enhancing extracellular vesicle secretion
Haruki Odaka1, Sho Nakazora2, Hirofumi Soga2
1Cellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8566, Japan.
Temperature-controlled microwave irradiation significantly boosts extracellular vesicle (EV) secretion from cells by 2-3 fold without altering EV molecular characteristics. This method offers a promising approach for enhanced EV production in regenerative medicine and diagnostics.
Area of Science:
- Biotechnology
- Cell Biology
- Regenerative Medicine
Background:
- Extracellular vesicles (EVs) are crucial for disease biomarkers and regenerative medicine.
- Efficient methods for enhancing EV secretion are needed.
- Conventional microwave irradiation can harm cells due to heat.
Purpose of the Study:
- To investigate the effect of a temperature-controlled microwave irradiation system (TEMIS) on EV secretion.
- To determine if TEMIS enhances EV production without compromising cell viability or EV characteristics.
Main Methods:
- HEK293T cells were subjected to microwave irradiation using TEMIS, maintaining a 37°C medium temperature.
- EVs were isolated and quantified.
- Cell viability, particle size distribution, proteome, and miRNA expression of EVs were analyzed.
Main Results:
- TEMIS-treated cells showed a 2- to 3-fold increase in EV secretion compared to controls.
- Cell viability remained unchanged after irradiation.
- Isolated EVs exhibited no significant differences in particle size, proteome, or miRNA profiles.
Conclusions:
- Temperature-controlled microwave irradiation (TEMIS) effectively enhances EV secretion.
- This method preserves EV molecular integrity and avoids cellular damage.
- TEMIS presents a practical technology for increasing EV production for therapeutic and diagnostic applications.
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