Abstract
Introduction and hypothesis
To investigate the tissue reactions of a novel porcine-derived urinary bladder matrix/small intestinal submucosa (UBM/SIS) biological mesh and SIS mesh implanted in a rabbit vaginal defect model.
Methods
Thirty-two rabbits were implanted with UBM/SIS mesh (Group A) and SIS mesh (Group B), respectively. Rabbits were sacrificed at 7, 14, 60, and 180 days after implantation. The tensile strength, elongation at break, and elastic modulus of the tissue were measured using biomechanical methods. The inflammatory response, cell infiltration, vascularization, and collagen fibers were observed.
Results
Compared with Group B, the tensile strength and elongation at break of group A was higher at 14, 60, and 180 days. The elastic modulus of group A was lower at 180 days. Inflammatory response of group A was milder at 14, 60, and 180 days. There was more cell infiltration in group A at 7 and 14 days. Vascularization was higher in group A at 7 days and 14 days. The order of collagen in group A was better at 14, 60, and 180 days. The proportion of thick red fibers in both groups showed an increasing trend. At 14 days, group A had more thick red fibers.
Conclusions
The novel UBM/SIS composite mesh had a milder inflammatory response; earlier induction of cell infiltration, angiogenesis, and collagen regeneration. Collagen fibers had a better order. It has a higher tensile strength and greater elongation at break, and can be used as a potential material for the treatment of pelvic organ prolapse.
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Acknowledgements
The present work was supported by Peking University Clinical Medicine +X Youth Special Project (A 82504-03)
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Peking University Clinical Medicine + X Youth Special Project,A82504-03,Yiting Wang
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Yiting Wang: experiments on animals, data collection, manuscript writing.
Kun Zhang: experiments on animals
Junfang Yang: experiments on animals
Ying Yao: experiments on animals
Yiqi Guan: experiments on animals
Wenyue Cheng: data collection
**song Han: project development
Jian Zhang: project development
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Wang, Y., Zhang, K., Yang, J. et al. Outcome of a novel porcine-derived UBM/SIS composite biological mesh in a rabbit vaginal defect model. Int Urogynecol J 34, 1501–1511 (2023). https://doi.org/10.1007/s00192-022-05400-5
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DOI: https://doi.org/10.1007/s00192-022-05400-5