Systematic Investigation of Polyurethane Biomaterial Surface Roughness on Human Immune Responses in vitro

• Published in: BioMed research international Vol. 2020; pp. 3481549 - 15
• Main Authors: Segan, Sören, Jakobi, Meike, Khokhani, Paree, Klimosch, Sascha, Billing, Florian, Schneider, Markus, Martin, Dagmar, Metzger, Ute, Biesemeier, Antje, Xiong, Xin, Mukherjee, Ashutosh, Steuer, Heiko, Keller, Bettina-Maria, Joos, Thomas, Schmolz, Manfred, Rothbauer, Ulrich, Hartmann, Hanna, Burkhardt, Claus, Lorenz, Günter, Schneiderhan-Marra, Nicole, Shipp, Christopher
• Format: Journal Article
• Language: English
• Published: United States Hindawi 2020; John Wiley & Sons, Inc; Hindawi Limited
• Subjects: Anti-Inflammatory Agents - immunology; Biocompatibility; Biocompatible Materials - chemistry; Biological products; Biomaterials; Biomedical materials; Blood; CD16 antigen; CD163 antigen; CD86 antigen; Cell adhesion & migration; Cell culture; Cell morphology; Cell spreading; Cell surface; Contact angle; Cytokines; Cytokines - metabolism; Cytology; Elongation; Histocompatibility antigen HLA; HLA-DR Antigens - metabolism; Humans; Immune response; Immune system; Immunity; Immunology; Inflammation; Injection molding; Killer cells; Leukocytes (mononuclear); Leukocytes, Mononuclear - immunology; Leukocytes, Mononuclear - ultrastructure; Lymphocytes; Lymphocytes T; Macrophages; Macrophages - immunology; Macrophages - ultrastructure; Male; Medical equipment; Microscopy, Confocal; Microscopy, Electron, Scanning; Monocytes; Monocytes - immunology; Monocytes - ultrastructure; Morphology; Peripheral blood mononuclear cells; Polyurethane; Polyurethane resins; Polyurethanes - chemistry; Proteins; Scanning electron microscopy; Scanning microscopy; Studies; Surface Properties; Surface roughness; T cells; T-Lymphocytes - immunology; T-Lymphocytes - ultrastructure; THP-1 Cells; Topography; Transplants & implants; Wound healing; Germany
• ISSN: 2314-6133; 2314-6141
• DOI: 10.1155/2020/3481549

It has been widely shown that biomaterial surface topography can modulate host immune response, but a fundamental understanding of how different topographies contribute to pro-inflammatory or anti-inflammatory responses is still lacking. To investigate the impact of surface topography on immune response, we undertook a systematic approach by analyzing immune response to eight grades of medical grade polyurethane of increasing surface roughness in three in vitro models of the human immune system. Polyurethane specimens were produced with defined roughness values by injection molding according to the VDI 3400 industrial standard. Specimens ranged from 0.1 μm to 18 μm in average roughness (Ra), which was confirmed by confocal scanning microscopy. Immunological responses were assessed with THP-1-derived macrophages, human peripheral blood mononuclear cells (PBMCs), and whole blood following culture on polyurethane specimens. As shown by the release of pro-inflammatory and anti-inflammatory cytokines in all three models, a mild immune response to polyurethane was observed, however, this was not associated with the degree of surface roughness. Likewise, the cell morphology (cell spreading, circularity, and elongation) in THP-1-derived macrophages and the expression of CD molecules in the PBMC model on T cells (HLA-DR and CD16), NK cells (HLA-DR), and monocytes (HLA-DR, CD16, CD86, and CD163) showed no influence of surface roughness. In summary, this study shows that modifying surface roughness in the micrometer range on polyurethane has no impact on the pro-inflammatory immune response. Therefore, we propose that such modifications do not affect the immunocompatibility of polyurethane, thereby supporting the notion of polyurethane as a biocompatible material.