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Background Tracheoesophageal fistula (TEF) is still a devastating clinical problem with high mortality. New clinical strategies were developed to sustain survival time. Mesenchymal stem cells were applied in many clinical wound healing fields. This study aims to investigate the main effect of stem cell to TEF.Material and Method We established a beagle model with TEF by punching the trachea and esophagus membrane and suturing. The beagles were divided into three groups (group 1 = 1, group 2 = 6, group 3 = 6). Group 2 and 3 received a TEF building operation. Group 3 were injected 2 ml stem cells (106 per animal), and group 2 injected saline water with same volume. Group 1 did not receive any intervention. All animals receipted total parental nutrition. The closure degree of fistula tissue was observed by bronchoscope and post-mortem after 35 d.Result Morphologic and histopathologic changes of fistulas were assessed by gross and endoscopic observation. The fistulas diameter was measured. In 35 d postoperatively, group 2 showed that 3 animals died for acute smother, 2 animal died for severe chronic pneumonia and 1 animal with consistent fistula. Group 3 showed that 2 animals fully closed, 3 animals fistula diameter significantly decreased, and 1 animal died for acute smother. In autopsy result, group 2 animals showed severer pneumonia degree than group 3 animals in 35 d.Conclusion The transplantation of stem cells can promote healing degree of TEF without any complications and relieve pneumonia at the same time. |
