Percutaneous transhepatic biliary radiofrequency and endoprothesis: a new therapy for malignant biliary obstruction / 南方医科大学学报

<p><b>OBJECTIVE</b>To explore a new approach to the management of malignant biliary obstruction using percutaneous transhepatic biliary radiofrequency and endoprothesis.</p><p><b>METHODS</b>Percutaneous transhepatic biliary radiofrequency and endoprothesis were performed in 2 cases of malignant biliary obstruction, including 1 of hilar cholangiocarcinoma and 1 of pancreatic head carcinoma. The tumor was ablated with radiofrequency followed by placement of matched metal stents into the biliary duct.</p><p><b>RESULTS</b>The surgical procedures were carried out smoothly in the 2 cases. The symptoms of the patients were obviously improved after the operation with a significant decrease in the serum levels of total bilirubin, and CA-199 level decreased to the normal level in 1 case.</p><p><b>CONCLUSIONS</b>This new approach is safe for management of malignant biliary obstruction. Compared with the more conventional interventional therapy, radiofrequency can reduce the intraoperative bleeding and arrest the local tumor growth to promote the patency of the stent as well as the postoperative survival of the patients.</p>

Effect of recipient derived bone marrow stromal cells on immunological rejection in mouse allogeneic skin transplantation / 中华整形外科杂志

<p><b>OBJECTIVE</b>To investigate the effect of recipient derived bone marrow stromal cells (BMSCs) on immunological rejection in mouse allogeneic skin transplantation.</p><p><b>METHODS</b>The C57BL/6 to BALB/c allogeneic skin transplantation model was created. The bone marrow stromal cells (BMSCs) were isolated from BALB/c by gradient density centrifugation and adhesion separation. The BMSCs were injected back through tail vein. The mouse were divided into three groups as group A (BALB/c + BMSCs), group B (BALB/c with skin transplantation), and group C (BALB/c with skin transplantation + BMSCs). The pathologic examination of the graft was performed and the cytokines such as IL-2, IFN-gamma were detected at the different time.</p><p><b>RESULTS</b>The attained BMSCs in the experiment had the characteristics of BMSCs. The acute immunological rejection reaction detected by immunohistochemistry staining was alleviated noticeably in group C than that in group B. The concentrations of cytokines IL-2, IFN-gamma in group B were lower than that in group C at 7 d (F = 248,954.6, P < 0.05; F = 148,311.7, P < 0.05) and 14 d (F = 117,372.3, P < 0.05; F = 126,743.3, P < 0.05) after skin transplantation.</p><p><b>CONCLUSIONS</b>Recipient derived BMSCs transfusion can alleviate the acute immunological rejection after allogeneic skin transplantation. The possible mechanism maybe related to the inhibitory effect on the secretion of cytokines like IL-2, IFN-gamma.</p>