An Injectable Zwitterionic Hydrogels with Multiple Intermolecular Interactions for Effective Prevention of Abdominal Adhesions.
Summary
An injectable zwitterionic hydrogel (PSA-ZnO) prevented postoperative peritoneal adhesions in rats at 7 and 14 days and outperformed a commercial hyaluronic acid barrier. It combined antifouling, antibacterial, hemostatic, and pro-healing effects while limiting fibrin organization and foreign body response.
Key Findings
- Complete prevention or full reduction of peritoneal adhesion severity in rats at 7 and 14 days post-surgery.
- Outperformed commercial hyaluronic acid gel; antibacterial clearance >95% for E. coli and S. aureus.
- Rapid hemostasis (55 s) and favorable wound-healing milieu (reduced IL-6/TNF-α, increased VEGF).
- Inhibited blood clot organization and pathologic fibrin accumulation, limiting foreign body response.
Clinical Implications
If safety and efficacy translate to humans, PSA-ZnO could reduce postoperative adhesions across abdominopelvic and aesthetic surgeries, lowering reoperations, pain, and bowel obstruction risk.
Why It Matters
This multifunctional material strategy addresses a long-standing unmet need in surgery by preventing adhesions without compromising inflammation control, with clear translational potential.
Limitations
- Preclinical animal study without human data
- Short follow-up (up to 14 days) and no large-animal validation; biocompatibility and degradation kinetics in humans unknown
Future Directions
Evaluate long-term performance, dosing, and degradation in large-animal models, followed by early-phase clinical trials assessing adhesion scores and safety.
Study Information
- Study Type
- Basic/mechanistic research
- Research Domain
- Prevention
- Evidence Level
- V - Preclinical in vivo rat study with supportive in vitro data
- Study Design
- OTHER