Objective To study the method for early diagnosis of acute rejection and the role of ELISPOT in donor evaluation. Methods All ventral heterotopic cardiac transplantation models were divided into three groups(each group having 25 recipients)as follows:rejection group(C57BL/6 donor heart to BALB/c recipient,no specific treatment after transplantation),treated group(C57BL/6donor heart to BALB/c recipient, donor specific splenocytes transfusion before transplantation plus 5 μg/g cyclosporin A per day applied continuously from 1 day before operation to 7 day posttransplantation),isograft group(BALB/c donor heart to BALB/c recipient,no specific treatment after transplantation). Mean survival time(MST)and histopathologic changes were observed. By using ELISPOT assay,IFN-γ-secreting splenocytes were detected and counted. Results MST of heart allografts in rejection and treated groups was(7.8±0.77)and(14.80±1.01)days respectively. The survival time of grafts in isograft group was all more than 28 days. There was significant difference among three groups. The number of infiltrating cells in rejection group was much more than the other groups as well as the extent of histopathologic changes. The number of donor-specific IFN-γ-secreting splenocytes in three groups on the posttransplantation day 4 and 7 was(288±16)、(32±10)、(6±2)/2×105and(416±19)、(44±8)、(7±2)/2×105,respectively,which had negative correlation with MST and positive correlation with histopathologic changes. Conclusions The detection of donor-specific IFN-γ-secreting splenocytes with ELISPOT assay might be a useful indicator for early diagnosis of acute rejection.This assay had high sensitivity and specificity enough for pretransplant donor evaluation.

With transmission electron microscopy,the endoplasmic reticulum of the parathyroid chief cells in normal and cadmium-treated golden hamsters was observed. After 1 month treatment of cadmium, there were dilated and whorl-shaped rough endoplasmic reticulum in the chief cells. After 3 and 6 months treatment of cadmium, there were concentric membranous body and paired endoplasmic reticulum in the chief cells. The mechanism responsible for the morphological change of the endoplasmic reticulum after cadmium treatment and the possible toxicologic effect were discussed.

Objective To investigate the safety and technique of hepatic segmentectomy without hepatic blood inflow occlusion.and to detect its influences on the function of the remnant liver and postoperative complications.Methods The clinical data of 37 hepatocellular carcinoma patients who had undergone hepatic segmentectomy without hepatic blood inflow occlusion(group A)in Tonal Hospital from December 2006 to December 2007 were retrospectively analyzed.The clinical data of 3 1 patients who were treated by hepatic segmentectomy with Pringle maneuver(group B)during the same period of time were used as control.The efficacy of the 2 treating methods was analvzed bv chi-square test and t test.Results The difference of perioperative blood losses between group A[(400±100)ml]and B[(350±100)ml]had statistical significance(t=0.717,P＞0.05).The time of alanine transaminase returning to the normal level in group A was(6±2)days,which was significantly shorter than(10±3)days in group B(t=6.006,P＜0.05).The postoperative complication rates of group A and B were 14%(5/37)and 35%(11/31),respectively,with statistical difference between the 2 groups(t=4.525.P＜0.05).Conclusions Hepatic segmentectomy without hepatic blood inflow occlusion can effectively prevent the hepatic ischemia reperfusion injury and reduce the postoperative complications.

Objective To explore an improved technique of mouse ventral heterotopic heart transplantation and construct an animal model for the study of transplantation immunity.Methods The donor heart aorta and the recipient ventral aorta, the donor pulmonary artery and the recipient inferior caval vein, were anastomosed by using the end-to-side suture technique respectively. At the same time, important anatomical structures of transplantation-related sites were measured.Results The diameter of recipient inferior caval vein and ventral aorta was (1.9?0.2)mm and (0.9?0.1)mm respectively. The average length of ventral blood vessels which can be used was (6.0?1.0)mm. The model construction success rate was 92%. The average time of donor operation and recipient operation was (8.0?1.0)min and (40.2?3.0)min respectively. The time of artery anastomosis and vena cava anastomosis was (9.3?1.2)min and (7.8?1.7)min respectively. Conclusions The animal model is stable and can be used for the study of transplantation immunity.

Objective To study the relationship between Th1/Th2 cytokine profiles and the survival time of cardiac allografts in mice.Methods The ventral heterotopic cardiac transplantation models were divided into three groups: rejection group, treated group, isograft group, each group with 20 recipients. Mean survival time(MST), pathologic histological changes, the mRNA expression of IFN-?,IL-2,IL-4 and IL-10 were measured.Results MST of heart allografts in rejection and treated group was (7.8?0.77)d, and (14.80?1.01)d respectively. The survival time of grafts in isograft group were all more than 28d. The difference among the three groups was significant. In rejection group, the number of infiltrating cells was much more than that in the other groups, and also, the extent of pathologic histological changes was more severe. The mRNA expression of IFN-? and IL-10 in graft and spleen in rejection group was much stronger than that in the others. There was no obvious mRNA expression of IL-2 and IL-4 in grafts of all three groups. The mRNA expression of IL-2 in the spleens of rejection group was the strongest, while the mRNA expression of IL-4 in the spleens of treated group was the strongest.Conclusions The dynamic equilibrium of Th1/Th2 cytokines plays an important role in the survival time prolongation of cardiac allografts in mice. IL-10 can also participate in the process of graft rejection.

Objective Objective In order to better keep up with the development of transplantation immunobiology.we established and compared two types of mouse heterotopic heart transplantation,and hope to help further organ transplantation studies.Methods According to the surgical procedures of Ono's type and Chen's type of mouse model of heterotopic heart transplantation with some modification,we performed celiac and cervical heteropotic heart transplantation between iso-strains and hetero-strains,and compared the operation suecess rate,operation time,allografi survival time,and histopathology of those establishment methods.Results The success rates of mouse celiac and cervical heterotopic heart transplantation were 86.7% and 83.3%,respectively,with a non-significant difference(P>0.05) between the two methods of operation regarding the total operation time,survival time of the allografts,and histopathological findings.Conclusions Based on the mastery of microsurgical techniques,the two models of heterotopic mouse heart transplantation can be established equally,and either of them can be considered depending on the particular requirements of studies.

Objective To retrospectively study the relationship between several risk factors such as cirrhosis,Child-Pugh classification,tumor size,portal vein tumor thrombus,intraoperative transfusion,hepatic portal occlusion time and the prognosis of hepatic cellular cancer( HCC ) patients after hepatic resection. Methods The clinical data of 123 patients who received hepatic resection for HCC at Tongji Hospital between 2007 and 2009 were retrospectively analyzed. Log-Rank test and Cox proportional hazard model were used in the univariate and multivariate analyses of risk factors. Results 1,2,3,5 year recurrence and survival rates were 54. 17%,66. 67%,81. 40%,87. 50% and 93. 50%,73. 17%,58. 54%,27. 64%,respectively. The mean recurrence time and survival time were 19. 5 months and 42. 9 months. In univariate analysis,presence of cirrhosis(χ2 =11. 159,P=0. 005),Child-Pugh classification(χ2 =7. 715,P=0. 028),tumor size(≥5cm)(χ2 =11. 483,P=0. 004),presence of portal vein invasion(χ2 =22. 271,P=0. 001)were risk factors affecting HCC recurrence. In multivariate analysis,presence of cirrhosis(χ2 =8. 993,P=0. 003),tumor size (≥5cm)(χ2 =4. 022,P=0. 039),presence of portal vein invasion(χ2 =5. 023,P=0. 027)were inde-pendent risk factors affecting HCC recurrence. In univariate analysis,presence of cirrhosis(χ2 =7. 339,P=0. 025),AFP﹥400 ng/ml(χ2 =5. 431,P=0. 042),Child-Pugh classification(χ2 =13. 389,P=0. 002), tumor size(≥5cm)(χ2 =11. 342,P=0. 003),presence of portal vein invasion(χ2 =52. 167,P﹤0. 001), hepatic portal occlusion(χ2 =5. 801,P=0. 037),intraoperative blood transfusion(χ2 =14. 959,P=0. 001) were risk factors affecting a shorter overall survival. In multivariate analysis,presence of cirrhosis(χ2 =9. 133, P=0. 003),Child-Pugh classification(χ2 =4. 799,P=0. 028),tumor size(≥5 cm)(χ2 =9. 101,P=0. 004),presence of portal vein invasion(χ2 =11. 126,P=0. 001),hepatic portal occlusion(χ2 =3. 985, P=0. 046)were independent prognostic factors affecting shorter overall survival. Conclusion Cirrhosis, Child-Pugh classification,tumor size(≥5 cm),presence of portal vein invasion,and hepatic portal occlusion were independent prognostic factors for HCC patients after hepatic resection.

Objective To investigate the surgical procedures for chronic pancreatitis associated with pancreatic duct stones.Methods The clinical data of 17 cases of chronic pancreatitis with pancreatic duct stones surgically treated were analyzed retrospectively.Results Of the 17 cases,13 had pancreatic duct stones in the head of the pancreas.4 had pancreaticolithiasis in the body and tail of the pancreas,six had additional choledocholithiasis.Surgical treatments included Roux-en-Y anastomosis of the pancreatic duct and jejunum in 6 cases(Partington procedure),anastomosis of pancreatic duct and stomach in 4 cases (Warren procedure).subtotal resection of the head of the pancreas with duodenal preservation in 3 cases (Beger's procedure).removal of the tail of pancreas with Roux-en-Y anastomosis of the distal pancreatic end to the iejunum in 3 cases(Duval's procedure),removal of the tail of pancreas and spleen with a Roux-en-Y anastomosis of the distal pancreatic end to ieiunum in 1 case.All 17 patients were cured,with complete relief of intractable abdominal pain in 15 cases.blood glucose was under eontrol in two out of six diabetics.Two cases suffered from postoperative pancreatic fistula.one patient died of pancreatic cancer 11 months after operation.Conclusion For patients with chronic pancreatitis and pancreaticolithiasis.surgical treatment should be highly individualized.We suggest drainage procedures for patients with dilatation of the pancreatic duct.Patients with no dilatation of the pancreatic duct and those with suspected carcinoma can be treated by partial pancreatectomy and Roux-en-Y pancreaticojejunostomy.Meanwhile effort must be applied to preserve the exocnne and endocrine pancreatic function vital for the patient's quality of life.

This study examined the effect of long-term administration of low-dose FTY720 on survival of murine cardiac allograft and the possible mechanism. Murine models of abdominal heterotopic heart transplantation were established. Low-dose FTY720 (0.3 mg/kg) was administrated to the animals 4 days before the transplantation of cardiac allografts until the occurrence of rejection or the observation terminals. The animals without FTY720 treatment and those with syngeneic cardiac grafts transplanted served as controls. The mean survival time (MST) of grafts, and T lymphocyte subsets in grafts, peripheral blood and lymphoid organs were measured by histopathological examination or flow cytometry, and compared among groups. The results showed that the MST of allografts in FTY720-treated mice was more than 40 days, significantly longer than that in the untreated group (MST=8 days, P<0.01). After the long-term administration of FTY720, the proportion of CD4(+) and CD8(+) lymphocytes in peripheral blood was diminished significantly, but the proportion of CD4(+) lymphocytes was increased in mesenteric lymph nodes (MLNs) and spleen. Immunofluorescence staining revealed that the infiltration of CD4(+) and CD8(+) lymphocytes in allografts was significantly inhibited after long-term administration of low-dose FTY720. It was concluded that low-dose long-term administration of FTY720 could promote T lymphocytes in lymphatic organs and decrease their infiltration in allografts, resulting in the inhibition of rejection and the long-term survival of allografts.

Pancreaticobiliary maljunction means the common bile duct and the main pancreatic duct in the duodenal wall, or is the formation of a long common channel leading to biliopancreatic reflux, resulting a series of biliopancreatic diseases, and even the occurrence of biliary malignancy. The pathogenesis of pancreaticobiliary maljunction is complex, involving biliary fluid dynamics, the activation of phospholipase A2, protease activation, amino acids, fat metabolism, gene mutation. This paper summarized the latest study of the pathogenesis of the pancreaticobiliary maljunction to let clinicians understand pancreaticobiliary maljunction diseases, and provide new treatment ideas.