Citation: | SUN Lei, YUAN Yuan, NIU Rui, et al. Comparative study on immunoreactions of small intestinal submucosa by irradiation and ethylene oxide sterilization treatments[J]. Journal of Beijing University of Aeronautics and Astronautics, 2020, 46(12): 2245-2252. doi: 10.13700/j.bh.1001-5965.2019.0621(in Chinese) |
Foreign body reaction is one of the key factors limiting the application of implantable biomaterials. This study evaluates the in vivo immune response of acellular Small Intestinal Submucosa (SIS) materials treated with irradiation and Ethylene Oxide (EO) sterilization technology for providing a basis for clinical trials. The sterilized materials are subcutaneously implanted into BALB/c mice for 14 or 28 days. Compared with negative controlgroup, there is no difference in the size, weight, cell numbers, lymphocytes proliferation and enzyme-linked immunosorbent assay of the immune organs for two sterilized materials on mice. These results prove that the SIS materials treated by two sterilization methods do not cause obvious inflammatory reaction. Flow cytometry analysis and H&E staining results show that the materials sterilized by EO have less immune stimulation to mice. It means that EO treatment is a safer and more reliable sterilization method for SIS material, providing a prospect for sterilization procedure and clinical application of acellular SIS materials.
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