ECM hydrogel coating mitigates the chronic inflammatory response to polypropylene mesh

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Surgical Innovation

Background:

• Polypropylene surgical mesh is widely used for hernia and prolapse repair, offering mechanical strength but causing chronic inflammation and fibrosis.
• Current mesh designs aim to reduce inflammatory responses and improve tissue integration.
• Extracellular matrix (ECM) scaffolds show promise for constructive tissue remodeling with minimal fibrosis.

Purpose of the Study:

• To evaluate the long-term effects of an ECM hydrogel coating on the host tissue response to polypropylene mesh.
• To assess the impact of ECM coating on inflammation and fibrosis in a rodent model of abdominal muscle injury.

Main Methods:

• Polypropylene mesh devices were coated with an ECM hydrogel and implanted in a rodent model.
• Host tissue response was analyzed at 14 and 180 days post-implantation.
• Inflammatory markers (M1 macrophages) and collagen deposition (density and type) were quantified.

Main Results:

• ECM-coated polypropylene mesh exhibited a reduced inflammatory response at 14 days, with fewer M1 macrophages compared to uncoated mesh.
• At 180 days, ECM-coated mesh showed decreased collagen density and less mature type I collagen deposition.
• The ECM coating effectively mitigated the chronic inflammatory and fibrotic responses typically associated with polypropylene mesh.

Conclusions:

• ECM hydrogel coating is a viable strategy to improve the biocompatibility of polypropylene surgical mesh.
• This coating reduces the foreign body response, leading to less scar tissue formation.
• ECM-coated polypropylene mesh demonstrates potential for enhanced tissue integration and improved clinical outcomes in hernia and prolapse repair.