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Título: Immune response to the long-term grafting of cryopreserved small-diameter arterial allografts
Fecha de publicación: 2012
Editorial: F. Hernández y Juan F. Madrid. Universidad de Murcia. Departamento de Biología Celular e Histología
Cita bibliográfica: Histology and histopathology, Vol. 27, nº 7 (2012)
ISSN: 1699-5848
Materias relacionadas: CDU::6 - Ciencias aplicadas::61 - Medicina::617 - Cirugía. Ortopedia. Oftalmología
Palabras clave: Cryopreservation
Inflammatory cells
Resumen: Introduction. The viability and immunological response induced by cryopreserved arterial allografts remain unclear. This study examines the post-graft behaviour of this type of vessel substitute. Materials and methods. Both iliac arteries were extracted from Lewis rats (donors) and used to establish groups of allogeneic fresh (group I) or cryopreserved (group II) grafts in Fisher-344 rats (recipients). Cryopreserved segments for grafting were prepared by automated controlled freezing at a cooling rate of 1°C/min followed by storage in liquid nitrogen vapour at -145°C for 30 days. Before grafting, the vessels were slowly thawed. Animals were sacrificed at 14, 30, 90 and 180 days post-surgery when graft specimens were obtained for light and electron microscopy and immunohistochemical detection of inflammatory cells (CD45, ED1, CD4, CD8). Results. After surgery, 85.71% of the grafts in group I and 82.14% in group II were patent. Following long-term implant, both the fresh and cryopreserved allografts showed complete loss of the muscle compartment of the media. Inflammatory or CD45-positive cells (mainly macrophages and CD8 T-lymphocytes) were detected at earlier time points in suture zones and adventitia. In the fresh allografts, the number of immunolabelled cells steadily increased until they were seen to occupy the entire adventitia at 90 days, with high numbers persisting at 6 months. In the cryopreserved allografts, this adventitial inflammatory infiltrate was significantly reduced. Conclusions. The cryopreservation/slow thawing protocol used diminished the immune response induced by fresh arterial allografts improving their behaviour after grafting.
Autor/es principal/es: Rodríguez, M.
Pascual, G.
Pérez-Köhler, B.
Cifuentes, A.
Garcia-Honduvilla, N.
Bellón, J.M.
Buján, J.
URI: http://hdl.handle.net/10201/54071
Tipo de documento: info:eu-repo/semantics/article
Número páginas / Extensión: 12
Derechos: info:eu-repo/semantics/openAccess
Aparece en las colecciones:Vol.27, nº 7 (2012)

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