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Macrophage response to experimental implantation of polypropylene prostheses
J M Bellón1, J Bujan, L Contreras
1Department of Morphological Sciences and Surgery, Faculty of Medicine, University of Alcala de Henares, Madrid, Spain.
Abstract:
We have assessed the macrophage response to polypropylene mesh (Marlex) implanted into the abdominal wall of New Zealand white rabbits, using RAM-11, a monoclonal antibody specific for rabbit macrophages. The response diminishes during the course of the first 90 days after implantation, although the presence of other cell types typical of foreign-body reactions increases. We have also confirmed the high degree of integration of the biomaterial into the wall achieved after 9 weeks. This has been determined using light and scanning electron microscopy. Likewise, we have observed the formation of numerous adhesions between the polypropylene mesh and the viscera of the abdominal cavity.
Insights
Macrophage response to polypropylene mesh decreases over 90 days in rabbits. Despite this, the mesh integrates well, but adhesions to abdominal organs form.
Area of Science:
- Biomaterials Science
- Immunology
- Surgical Research
Background:
- Polypropylene mesh (Marlex) is widely used in abdominal wall reconstruction.
- Understanding the host's biological response to implanted meshes is crucial for optimizing surgical outcomes.
- Macrophage activity is a key component of the foreign-body response to biomaterials.
Purpose of the Study:
- To evaluate the temporal macrophage response to polypropylene mesh implanted in rabbit abdominal walls.
- To assess the integration of the mesh into the abdominal wall.
- To identify any associated complications, such as adhesions.
Main Methods:
- Implantation of polypropylene mesh into the abdominal wall of New Zealand white rabbits.
- Immunohistochemical analysis using RAM-11 monoclonal antibody to identify macrophages.
- Light and scanning electron microscopy to evaluate tissue integration and morphology.
- Observation of adhesions between the mesh and abdominal viscera.
Main Results:
- The macrophage response, identified by RAM-11, significantly diminished within 90 days post-implantation.
- Concurrent increase in other cell types characteristic of foreign-body reactions was observed.
- High-degree integration of the polypropylene mesh into the abdominal wall was confirmed by 9 weeks.
- Numerous adhesions between the mesh and abdominal viscera were noted.
Conclusions:
- The acute macrophage response to polypropylene mesh subsides over time, suggesting adaptation.
- While mesh integration is robust, the formation of adhesions presents a potential clinical concern.
- Further research may focus on mitigating adhesion formation while maintaining mesh integration.