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• W4283825196 endingPage "204173142211026" @default.
• W4283825196 startingPage "204173142211026" @default.
• W4283825196 abstract "The primary objective was to evaluate performance of low concentration SDS decellularised porcine pulmonary roots in the right ventricular outflow tract of juvenile sheep. Secondary objectives were to explore the cellular population of the roots over time. Animals were monitored by echocardiography and roots explanted at 1, 3, 6 ( n = 4) and 12 months ( n = 8) for gross analysis. Explanted roots were subject to histological, immunohistochemical and quantitative calcium analysis ( n = 4 at 1, 3 and 12 months) and determination of material properties ( n = 4; 12 months). Cryopreserved ovine pulmonary root allografts ( n = 4) implanted for 12 months, and non-implanted cellular ovine roots were analysed for comparative purposes. Decellularised porcine pulmonary roots functioned well and were in very good condition with soft, thin and pliable leaflets. Morphometric analysis showed cellular population by 1 month. However, by 12 months the total number of cells was less than 50% of the total cells in non-implanted native ovine roots. Repopulation of the decellularised porcine tissues with stromal (α-SMA+; vimentin+) and progenitor cells (CD34+; CD271+) appeared to be orchestrated by macrophages (MAC 387+/ CD163 low and CD163+/MAC 387−). The calcium content of the decellularised porcine pulmonary root tissues increased over the 12-month period but remained low (except suture points) at 401 ppm (wet weight) or below. The material properties of the decellularised porcine pulmonary root wall were unchanged compared to pre-implantation. There were some changes in the leaflets but importantly, the porcine tissues did not become stiffer. The decellularised porcine pulmonary roots showed good functional performance in vivo and were repopulated with ovine cells of the appropriate phenotype in a process orchestrated by M2 macrophages, highlighting the importance of these cells in the constructive tissue remodelling of cardiac root tissues." @default.
• W4283825196 created "2022-07-07" @default.
• W4283825196 creator A5004422183 @default.
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• W4283825196 date "2022-01-01" @default.
• W4283825196 modified "2023-10-10" @default.
• W4283825196 title "Repopulation of decellularised porcine pulmonary valves in the right ventricular outflow tract of sheep: Role of macrophages" @default.
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