HETEROTOPIC TRANSPLANTATION OF NON-IMMUNOGENIC TRACHEA POPULATED WITH RECIPIENT BONE MARROW STROMAL CELLS



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Abstract

Morphological changes in decellularized allogenic trachea populated with recipient bone marrow stromal (mesenchymal) stem cells and transplanted heterotopically, were examined in 30 C57Bl/6 and Balb/c mice of 22-25 g body mass. The research results have shown the insufficient efficacy of a transplant preparation mode by freezing and thawing method as in this case inflammatory reaction developed in the transplant area and its rejection took place. It was established that the mode of obtaining decellularized tracheal transplant by means of sodium perchlorate (NaClO4) treatment, proposed by the authors, unlike a freezing-thawing mode, allowed to efficiently remove immunocompetent cells that expressed MHC I and II markers. NaClO4 effect did not result in either chondrocyte damage or significant disturbance of tracheal cartilaginous and connective tissue structure in heterotopic transplants. Since transplant population with bone marrow stromal stem cells promoted connective tissue restoration, reduced the formation of granulations in anastomosis area and favored faster transplant epithelization, most promising method of trachea preparation for transplantation apparently seems to be the combination of immune cell removal from this organ by NaClO4 treatment with subsequent bone marrow stromal stem cell population of transplant obtained.

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