Injectable, Antibacterial, and Hemostatic Tissue Sealant Hydrogels

Area of Science:

• Biomaterials Science
• Nanotechnology
• Wound Healing

Background:

• Surgical wound management faces challenges from bleeding and bacterial infections.
• Current bioadhesives often lack adequate hemostatic and antibacterial functions.
• Weak sealing efficacy on stretchable organs necessitates improved sealant technology.

Purpose of the Study:

• To engineer a mechanically robust, injectable hydrogel sealant with hemostatic and antibacterial properties.
• To address the unmet need for effective sealants in complex wound closure.
• To create a versatile sealant for challenging anatomical locations.

Main Methods:

• Nanoengineering of a gelatin methacryloyl (GelMA) hydrogel.
• Incorporation of zinc ferrite (ZF) nanoparticles for antibacterial effects.
• Addition of silicate nanoplatelets (SNs) for enhanced hemostasis and mechanical properties.

Main Results:

• The GelMA-based hydrogel demonstrated over 90% reduction in Staphylococcus aureus viability.
• Addition of SNs and ZF nanoparticles improved lung burst pressure by over 40%.
• The sealant showed a ~250% improvement in tissue sealing compared to a commercial sealant and reduced bleeding by ~50% in rat models.

Conclusions:

• The nanoengineered hydrogel sealant offers a promising solution for complex wounds.
• The material combines mechanical flexibility, infection control, and hemostasis.
• This innovation presents potential translational opportunities in surgical sealant applications.