Improving the biocompatibility of biomaterial constructs and constructs delivering cells for the pelvic floor.

Purpose of review Interactions between biomaterials and biomaterial-delivering cells and the host tissues are complexly affected by the material itself, the ultrastructure of the overall construct and cells and other bioactive factors involved. The aim of this review is to review the current understanding on the definitions of biocompatibility and current advances in improving biocompatability of tissue-engineered constructs. Recent findings Some synthetic materials are associated with more foreign body reactions compared with natural materials; however, they allow fabrication of materials with a great diversity of physical and mechanical properties. Material design strategies can be tailored to mimic the natural extracellular matrix topography. There are also advancements in the pharmacological functionalization of materials with improved angiogenic potential that can lead to better tissue response. Stem cells are also used to improve the tissue response of tissue-engineered materials; however, the recent regulations on regenerative medicine products necessitate significant regulatory approval processes for these. Summary The biggest challenge faced in translation of tissue-engineered constructs into clinical practice relates to their engraftment and poor tissue integration into the challenging wound bed of the pelvic floor. Biocompatibility of tissue engineered constructs can theoretically be improved by the incorporation of bioactive agents, such as vitamins C or oestradiol.