ObjectiveTo observe the effects of aquaporin 1 (AQP1) on the proliferation and migration of endothelial progenitor-endothelial progenitor cells (EPC).MethodsBone marrow cells of AQP1 wild-type (WT) (n=6) and knockout-type (KO) mice (n=6) were isolated and differentiated into EPC in vitro. Immunofluorescence was used to detect cell surface antigens to identify EPC. Live cell kinetic imaging and quantification technology, transwell migration assays, as well as scratch test were used to compare the function of EPC between AQP1 WT and KO mice.ResultsEPC culture showed that cells were initially suspended and gradually adhered to typical mesenchymal stem cells within 7 days. After cultured on special medium for endothelial cells they were adhered and differentiated, and fusiform or polygonal, paving stone-like EPC were observed around 14 days. When cultured by special medium of EPC, CD133 and CD31 were positively detected after 7 days, and CD34 and Flk-1 were positively detected after 14 days. Positive expression of AQP1 was only detected in EPC of AQP1 WT mice. Functional studies of EPC revealed there was no significant difference in the proliferation of EPC between AQP1 WT and KO group mice. Transwell assay showed that EPC migration ability of AQP1 KO mice was significantly weaker than that of WT mice. The scratch healing ability of EPC in AQP1 KO mice was significantly lower than that of WT mice.ConclusionsEPC initially shows the characteristics of stem cells and with the prolongation of culture time, EPC gradually shows the characteristics of endothelial cells. AQP1 affects the EPC migration rather than proliferation.
Objective To evaluate whether jejunal interposition pouch (JIP) reconstruction is an ideal procedure of digestive tract reconstruction after total gastrectomy. Methods Ninetyfour patients after total gastrectomy had randomly divided into two groups, JIP group 42 cases and RouxenY pouch (RYP) group 52 cases. The gastrointestinal function improvement in body weight and nutritional parameters (serum albumin, hemoglobin level, and serum protein) were compared 1 year after surgery for the two groups. Results The nutritional condition of JIP group and RYP group after operation had improved (P＜0.01); and the condition of JIP group with fewer symptom problems demonstrated much more better than standard RYP group （P＜0.01）. Conclusion JIP that could obtain partly compensatory function after total gastrectomy is an ideal reconstruction.