Mesenchymal stem cell-derived small extracellular vesicles facilitate repair of acute obstruction-induced colonic anastomosis injury by modulating early-stage inflammation in rats

Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.

• Level A · Stronger Clinical Evidence
• Level B · Emerging clinical evidence with positive signals
• Level C · Early human research exploring benefits
• Level D · Scientific groundwork from lab and animal studies
• Emerging · Emerging topic under active research

Abstract (original English)

Background Anastomotic leakage (AL), a major complication of colonic anastomoses, leads to prolonged hospital stays and increased mortality. Despite various interventions, AL incidence remains high at approximately 8%. Mesenchymal stem cells-derived small extracellular vesicles (MSCs-sEVs) have emerged as promising therapeutic agents because of their ability to exert immunoregulatory effects and promote tissue repair. Therefore, in this study, we investigated the role of MSC-sEVs in the healing of colonic anastomoses and elucidated the underlying mechanisms. Methods In the preliminary experiments, male Sprague-Dawley rats were assigned to either a colonic obstruction or a sham surgery group, and the impact of acute colonic obstruction on colonic anastomosis healing was assessed, using an anastomotic complication score system. Based on observed impairment in ​healing progression, MSC-sEVs were administered topically in the subsequent experiments, and their therapeutic effects on anastomotic healing were analysed. Results Acute bowel obstruction impaired colonic anastomosis healing on postoperative day four; however, the topical administration of MSC-sEVs significantly improved healing. This was mainly demonstrated by reduced immune cell infiltration, downregulation of pro-inflammatory pathways, and decreased expression of inflammatory factors, effectively controlling excessive i

Evidence level

Evidence from laboratory and animal studies provides groundwork for understanding mechanisms and potential before human studies continue.

Browse all related research

Filter the research library by this study's title keywords, author, or publication year.