Peer-reviewed veterinary case report
How do nanovesicles help with abdominal hernia repair?
By Zhang B et al.·2026·Department of General Surgery, China·View original on Europe PMC →
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Original publication title: Tissue-specific matrix-bound nanovesicles regulate the immunoregulatory progress of biological mesh-aided abdominal hernia repair.
- Species:
- rodent
Plain-English summary
In this study, researchers looked at how tiny particles called matrix-bound nanovesicles (MBVs), found in certain types of biological mesh used for repairing abdominal hernias, affect the healing process. They discovered that MBVs from small intestinal mesh helped with new blood vessel formation, while those from urinary bladder mesh encouraged a calming immune response. When tested in a rat model, the urinary bladder mesh caused less early inflammation compared to the small intestinal mesh, but over time, the benefits of the bladder mesh were reduced when it was mixed with the intestinal mesh. The small intestinal mesh initially caused more inflammation but eventually helped the healing process by promoting tissue integration after several weeks. Overall, the study suggests that understanding these MBVs could lead to better treatments for hernia repairs.
Abstract
Consensus on abdominal hernia treatment with biological meshes remains elusive, largely due to variable and dynamic responses that dictate extracellular matrix (ECM) remodeling outcomes. Matrix-bound nanovesicles (MBVs) are ECM-embedded bioactive cues that govern cell-mesh crosstalk, whereas their tissue-specific functions in immunomodulatory repair remain poorly understood. Herein, MBVs were isolated from clinically used small intestinal submucosa (SIS) and urinary bladder matrix (UBM)-SIS (UBM-SIS) meshes to investigate their differential immunomodulation during hernia repair. SIS MBVs promoted angiogenesis via ERK1/2 activation, while UBM MBVs favored anti-inflammatory macrophage polarization through transforming growth factor-β1(TGF-β1) signaling pathways, showing synergistic effects in combination. In the repair of a full-thickness rat model, UBM-SIS meshes elicited milder early inflammation than SIS meshes. However, the superior immunomodulation of UBM was compromised with the progressive exposure of SIS interlayer. Conversely, SIS meshes initially triggered pronounced inflammation but switched to an anti-inflammatory state after 4 weeks, facilitating tissue integration over 8 weeks through prevailing neovascularization. The ECM-driven response in distinct microenvironments closely aligned with the spatiotemporal release of respective MBVs, with mechanistic analyses corroborating their functional relevance in orchestrating reciprocal pro/anti-inflammatory and remodeling signals. Investigating tissue-specific MBVs offers insights into their roles in hernia repair and highlights emerging therapeutic potential in regenerative applications.
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Search related cases →Original publication on Europe PMC: https://europepmc.org/article/MED/41909505