Canine tracheal cartilage cryopreservation: Freezing injury is not related to caspase-3 expression
Por:
Sotres-Vega A., Santibanez-Salgado, JA, Villalba-Caloca J., Gaxiola-Gaxiola M., Ramos-Abraham C., Rosales-Torres A.M., Jiménez-García L.F.
Publicada:
1 feb 2013
Resumen:
Currently, there are no surgical strategies to treat tracheal lesions longer than 7 cm. Such patients are not candidates for tracheal resection or end-to-end anastomosis and are thus left with only repeated palliative procedures to relieve their respiratory insufficiency. Experimental studies using cryopreserved trachea have produced contradictory results, limiting the clinical application of this technique. We evaluated caspase-3 expression and the histological integrity of canine tracheal cartilage cryopreserved using two different solutions, two temperatures, and varying lengths of storage time. Thirty canine tracheal segments of 5 rings were studied. Group 1: Control without cryopreservation. Groups 2 and 4: Cryopreserved in F12K media with 20% fetal bovine serum (FBS) at -70 °C for 48 hours. Groups 3 and 5: Cryopreserved in 90% FBS at -70 °C for 48 hours. Groups 4 and 5 were then stored for 15 days in liquid nitrogen. All of the segments were thawed, fixed in wax, and cut into rings. Three rings were selected for caspase-3 expression and histological evaluation. Staining of cartilage matrices was significantly modified in the tracheal segments of Group 5. The central region of the cartilage ring was more vulnerable to the effects of freezing than the edges. Under the same cryopreservation temperature and storage time, tracheal cartilage integrity is better preserved when F12K media is used. Caspase-3 expression is not related to cartilage injury from the cryopreservation process. Copyright © 2013, Mary Ann Liebert, Inc. 2013.
Filiaciones:
Sotres-Vega A.:
Lung Transplantation Research Unit, National Institute of Respiratory Diseases Ismael Cosio Villegas, Tlalpan, Mexico
Autonomous Metropolitan University-Xochimilco, Mexico City, Mexico
Villalba-Caloca J.:
Lung Transplantation Research Unit, National Institute of Respiratory Diseases Ismael Cosio Villegas, Tlalpan, Mexico
Gaxiola-Gaxiola M.:
Lung Transplantation Research Unit, National Institute of Respiratory Diseases Ismael Cosio Villegas, Tlalpan, Mexico
Ramos-Abraham C.:
Lung Transplantation Research Unit, National Institute of Respiratory Diseases Ismael Cosio Villegas, Tlalpan, Mexico
Autonomous Metropolitan University-Xochimilco, Mexico City, Mexico
Rosales-Torres A.M.:
Autonomous Metropolitan University-Xochimilco, Mexico City, Mexico
Jiménez-García L.F.:
Autonomous Metropolitan University-Xochimilco, Mexico City, Mexico
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