The Impact of γ-Irradiation and EtO Degassing on Tissue Remodeling of Collagen-based Hybrid Tubular Templates.

Autor:	Sloff M; Department of Urology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Geert Grooteplein 28 Zuid, 6525 GA Nijmegen, The Netherlands., Janke HP; Department of Urology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Geert Grooteplein 28 Zuid, 6525 GA Nijmegen, The Netherlands., de Jonge PKJD; Department of Urology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Geert Grooteplein 28 Zuid, 6525 GA Nijmegen, The Netherlands., Tiemessen DM; Department of Urology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Geert Grooteplein 28 Zuid, 6525 GA Nijmegen, The Netherlands., Kortmann BBM; Department of Urology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Geert Grooteplein 28 Zuid, 6525 GA Nijmegen, The Netherlands.; Radboudumc Amalia Children's Hospital, Radboud University Medical Center, Geert Grooteplein 10 Zuid, 6525 GA Nijmegen, The Netherlands., Mihaila SM; Department of Urology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Geert Grooteplein 28 Zuid, 6525 GA Nijmegen, The Netherlands., Geutjes PJ; Department of Urology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Geert Grooteplein 28 Zuid, 6525 GA Nijmegen, The Netherlands., Feitz WFJ; Department of Urology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Geert Grooteplein 28 Zuid, 6525 GA Nijmegen, The Netherlands.; Radboudumc Amalia Children's Hospital, Radboud University Medical Center, Geert Grooteplein 10 Zuid, 6525 GA Nijmegen, The Netherlands., Oosterwijk E; Department of Urology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Geert Grooteplein 28 Zuid, 6525 GA Nijmegen, The Netherlands.
Jazyk:	angličtina
Zdroj:	ACS biomaterials science & engineering [ACS Biomater Sci Eng] 2018 Sep 10; Vol. 4 (9), pp. 3282-3290. Date of Electronic Publication: 2018 Jul 25.
DOI:	10.1021/acsbiomaterials.8b00369
Abstrakt:	Clinical implementation of novel products for tissue engineering and regenerative medicine requires a validated sterilization method. In this study, we investigated the effect of γ-irradiation and EtO degassing on material characteristics in vitro and the effect on template remodeling of hybrid tubular constructs in a large animal model. Hybrid tubular templates were prepared from type I collagen and Vicryl polymers and sterilized by 25 kGray of γ-irradiation or EtO degassing. The in vitro characteristics were extensively studied, including tensile strength analysis and degradation studies. For in vivo evaluation, constructs were subcutaneously implanted in goats for 1 month to form vascularized neo-tissue. Macroscopic and microscopic appearances of the γ- and EtO-sterilized constructs slightly differed due to additional processing required for the COL-Vicryl-EtO constructs. Regardless of the sterilization method, incubation in urine resulted in fast degradation of the Vicryl polymer and decreased strength (<7 days). Incubation in SBF was less invasive, and strength was maintained for at least 14 days. The difference between the two sterilization methods was otherwise limited. In contrast, subcutaneous implantation showed that the effect of sterilization was considerable. A well-vascularized tube was formed in both cases, but the γ-irradiated construct showed an organized architecture of vasculature and was mechanically more comparable to the native ureter. Moreover, the γ-irradiated construct showed advanced tissue remodeling as shown by enhanced ECM production. This study shows that the effect of sterilization on tissue remodeling cannot be predicted by in vitro analyses alone. Thus, validated sterilization methods should be incorporated early in the development of tissue engineered products, and this requires both in vitro and in vivo analyses. Competing Interests: The authors declare no competing financial interest.
Databáze:	MEDLINE
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