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Updated: May 6, 2026

Highly Efficient Transfection of Human THP-1 Macrophages by Nucleofection
Published on: September 2, 2014
Harnessing Extracellular Vesicles for Stabilized and Functional IL-10 Delivery in Macrophage Immunomodulation
Najla A Saleh1, Matthew A Gagea1,2, Xheneta Vitija1,3
1Institute for Quantitative Health Science and Engineering (IQ), Michigan State University, East Lansing, Michigan, USA.
Engineered extracellular vesicles (EVs) efficiently deliver interleukin-10 (IL-10) for enhanced stability and immune modulation. Naïve EVs also show anti-inflammatory effects, highlighting complex EV functions.
Area of Science:
- Biotechnology
- Immunology
- Cell Biology
Background:
- Extracellular vesicles (EVs) are emerging as potent carriers for therapeutic cargo, particularly for immune modulation.
- Interleukin-10 (IL-10) is a critical anti-inflammatory cytokine with therapeutic potential.
Purpose of the Study:
- To investigate the use of HEK293FT cell-derived EVs for stabilizing and delivering IL-10.
- To characterize the biophysical properties and functional immunomodulatory effects of IL-10-loaded EVs.
Main Methods:
- Overexpression of IL-10 using minicircle (MC) DNA vectors for EV loading.
- Biophysical characterization (surface/encapsulated forms) and functional assays on pro-inflammatory macrophages.
- Size-based fractionation (lEVs, sEVs, NVEPs) and anion exchange chromatography for purification and analysis.
Main Results:
- IL-10+ EVs demonstrated superior stability compared to free IL-10 protein.
- IL-10+ EVs suppressed inflammatory cytokine expression in macrophages.
- Naïve EVs exhibited intrinsic anti-inflammatory effects, indicating complex EV bioactivity.
- IL-10 was present in various EV fractions, with activity distributed across subpopulations.
Conclusions:
- Engineered EVs offer a stable platform for IL-10 delivery and immunomodulation.
- The intrinsic cargo of EVs contributes significantly to their immunomodulatory functions, complicating direct cytokine effect attribution.
- Further research is needed to differentiate engineered cytokine effects from endogenous EV components for therapeutic applications.
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