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- W2553358428 abstract "Introduction Bronchiolitis obliterans (BO) is the major cause of death in lung transplantation after 1 year. On the other hand, mesenchymal stem cells (MSC) have shown to participate in reparative processes. Objectives To reproduce a BO animal model and assess the effect of MSC for preventing the histologic lesion. Methods We developed an heterotopic tracheal transplantation rat model of BO. BO lesion was successfully reproduced at day 21 (control group). Then, we transplanted in 45 rats bone marrow-derived MSC through 3 routes (topical, endotracheal, endovascular) and at 3 time points (same day of tracheal grafting, at day 7 and 14) [5 individuals each group]. Variables: grade of tracheal lumen obliteration, fibrosis, neovascularization, histologic pattern. Flourescence In Situ Hibridation (FISH) and Inmunohistochemistry (IHQ) were used to detect MSC. Results All MSC groups had significant differences in histologic pattern with regard to control group (p 0.006), showing more neovessels and less fibrosis. The group who received MSC at day 7 presented less fibrosis (p 0.033), and the subgroup who received MSC at day 7 by endotracheal route showed less fibrosis and grade of lumen obliteration (p 0.048). FISH-IHQ showed MSC expressing type II neumocite markers and were localized into a neoformed alveolar-like tissue. Conclusions Reproducibility of a BO animal model is feasible. MSC transplanted in that model are able to modify the typical BO lesion, so a reparative effect might be attributed to MSC. Expression of a neumocite marker by MSC localized in neo alveolar-like tissue shows a certain degree of regenerative effect. Endotracheal route appears to be the best one to MSC transplantation." @default.
- W2553358428 created "2016-11-30" @default.
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- W2553358428 date "2016-09-01" @default.
- W2553358428 modified "2023-09-27" @default.
- W2553358428 title "Bone marrow-derived mesenchymal stem cells transplantation in a model of bronchiolitis obliterans" @default.
- W2553358428 doi "https://doi.org/10.1183/13993003.congress-2016.pa4630" @default.
- W2553358428 hasPublicationYear "2016" @default.
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