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Prolonged Immunomodulator Delivery Boosts Monocyte Exosome Secretion and Elevates Cathelicidin/LL-37 Content
Dezun Ma1, Yajuan Su1, Navatha Shree Sharma1
1Department of Surgery-Transplant and Mary & Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States.
ACS Applied Materials & Interfaces
|December 19, 2024
Summary
Researchers developed engineered exosomes loaded with human cathelicidin LL-37 to improve therapeutic potential. This novel approach enhances LL-37 levels and exosome production for wound healing and infectious disease treatments.
Area of Science:
- Biomedical Engineering
- Immunology
- Nanotechnology
Background:
- Human cathelicidin LL-37 exhibits therapeutic potential for immune support and disease treatment.
- Its clinical application is limited by low activity and instability in physiological conditions.
- Exosomes are promising nanocarriers for drug delivery and regenerative medicine.
Purpose of the Study:
- To enhance LL-37 content and production of exosomes derived from THP-1 monocytes.
- To investigate the therapeutic potential of engineered exosomes for wound healing, tissue regeneration, and infectious diseases.
Main Methods:
- Incubating THP-1 monocytes with electrospun nanofibers loaded with immunomodulators (1α,25-dihydroxyvitamin D3 and VID400).
- Characterizing the engineered exosomes for LL-37 content and production yield.
- Evaluating the biological activities of engineered exosomes, including effects on skin cells, endothelial cells, and antibacterial properties.
Main Results:
- Immunomodulator-loaded nanofibers significantly increased LL-37 levels within exosomes.
- Exosome production yield was substantially enhanced by the nanofiber treatment.
- Engineered exosomes promoted skin cell proliferation and migration, enhanced endothelial cell tube formation, and demonstrated antibacterial activity.
Conclusions:
- This study presents an effective strategy to boost LL-37 content and yield of engineered exosomes.
- These engineered exosomes show significant therapeutic potential for wound healing, tissue regeneration, and infectious disease treatment.
- The approach offers a promising avenue for developing advanced nanomedicines.
