Matrix-Bound Nanovesicles as Tissue-Specific Signaling Hubs for Immunomodulation and Precision Regenerative Medicine

Area of Science:

• Regenerative Medicine
• Biomaterials Science
• Immunology

Background:

• The extracellular matrix (ECM) is evolving from a scaffold to a bioactive signaling hub in regenerative medicine.
• Matrix-bound nanovesicles (MBVs), a subclass of extracellular vesicles (EVs) within collagen fibers, are critical drivers of ECM bioactivity.
• MBVs possess unique release kinetics and tissue-specific signatures influencing therapeutic outcomes.

Purpose of the Study:

• To review the biogenesis, isolation, and cellular tropism of MBVs.
• To highlight the role of macrophages in mediating MBV immunomodulatory effects.
• To propose a precision medicine framework for MBV application in regenerative therapy.

Main Methods:

• Literature review of MBV research.
• Analysis of MBV biogenesis and isolation techniques.
• Evaluation of macrophage-mediated immunomodulation by MBVs.

Main Results:

• MBVs exhibit distinct properties compared to fluid-phase EVs, including matrix-degradation-triggered release.
• Macrophages are central to the immunomodulatory functions of MBVs.
• Tissue source of MBVs (e.g., small intestinal submucosa vs. cartilage) dictates their pro- or anti-angiogenic potential.

Conclusions:

• MBVs represent a promising cell-free platform for regenerative therapy.
• A precision medicine approach matching MBV tissue sources to injury requirements is proposed.
• Post-harvest engineering strategies can enhance MBV targeting and potency, addressing translational hurdles.