Objective To investigate the effects of nitric oxide (NO) on reperfusion injury following pancreaticoduodenal transplanta- tion in rats. Methods The homologous male Wistar rat model of heterotopic total pancreaticoduo...Objective To investigate the effects of nitric oxide (NO) on reperfusion injury following pancreaticoduodenal transplanta- tion in rats. Methods The homologous male Wistar rat model of heterotopic total pancreaticoduodenal transplantation was used. The L-arginine (L-Arg) group received intravenous injection of L-Arg 5 minutes before and after reperfusion at a dose of 200 mg/kg while the N-Nitro-L-Arginine methyl ester (L-NAME) group received intravenous injection of L-NAME at a dose of 10mg/kg, and control group received saline. The amount of NO in the pancreas graft was measured. Serum concentration of cytokine-induced neutrophil chemoattractant (CINC) determined by enzyme-linked immunosorbant assay, expression of CINC mRNA detected by Northern blot assay, and myeloperoxidase (MPO) activity in the pancreas graft were measured. Histological observation was performed. Results The amount of NO in the L-Arg group was higher than in the control group, while in the L-NAME group was lower than in the control group (P < 0.05). The peak of serum CINC concentration occurred 3 hours after reperfusion with significant difference among groups. Expression peak of CINC mRNA in the pancreas graft occurred 3 hours after reperfusion. The expression level in the L-Arg group was lower than in the control group, the L-NAME group was higher than control group (P < 0.05). MPO activity in the L-Arg group obviously decreasd compared with other groups. The pancreas inflamma- tion was ameliorated in L-Arg group, and pancreas damage was aggravated in L-NAME group. Conclusions L-Arg can increase the amount of NO and inhibit the elevation of CINC, CINC mRNA expression, and early neutrophil accumulation in the transplanted pancreas. NO has protective effects on the ischemia/reperfusion injury of pancreaticoduodenal transplantation .展开更多
Objective.To investigate the difference of rejection in single versus combined pancreas and kidney transplantation in rats. Methods.Allograft models including simultaneous pancreas and kidney(SPK)transplant and pancre...Objective.To investigate the difference of rejection in single versus combined pancreas and kidney transplantation in rats. Methods.Allograft models including simultaneous pancreas and kidney(SPK)transplant and pancreas or kidney transplant alone were established in SD-Wistar rats, rejections of pancreas and kidney in different models were compared morphologically and functionally. Results.Mean survival time(MST)of pancreas was significantly prolonged in SPK than in pancreas transplant alone(PTA)(115 days vs. 92 days, P<005). Incidence of interstitial pancreatic rejection at grade Ⅱ and grade Ⅲ was much obvious in PTA than in SPK(429% vs. 125% at grade Ⅱ and 286% vs 63% at grade Ⅲ , P<005). No significant difference was found in MST between SPK and kidney transplant alone(KTA). Administration of cyclosporine A prolonged the MST of pancreas and kidney, without altering the tendency stated above. Conclusions.In SPK, the function of pancreas is protected by kidney hence the severity of rejection is reduced, whereas the function of kidney is not protected by pancreas. It suggests that different organs differ in immunoallergization and immunoregulation, and immune response tend to attack organs with greater immunoactivity, those organs with minor one could be protected. Cyclosporine A is effective on prolonging the MST of pancreas and kidney.展开更多
The present study observed the mutual benefit role of liver and pancreas in combined hepaticopan-creatic transplantation in rats. The results indicated that pancreas, when transplanted with liver, could survive for a ...The present study observed the mutual benefit role of liver and pancreas in combined hepaticopan-creatic transplantation in rats. The results indicated that pancreas, when transplanted with liver, could survive for a significant long time (13. 4±1.01 days) than it transplanted alone (9. 2±1.14 days) (P< 0. 05, t test). The interstitial rejection was mild and its rejection grade was significantly different from that of pancreas transplanted alone (P<0. 05, X2 test). The liver, when transplanted with pancreas, regenerated with strong competence and contact structure morphologically compared with liver transplanted alone. We think that pancreas could be immunologically protected against rejection and liver can be nutri-tionalized by pancreas in combined liver and pancreas transplantation.展开更多
For meeting the clinic needs in simultaneous pancreas and kidney transplantation (SPK), we success-fully establish a syngeneic SPK transplatation model in Lewis rats. The results indicate that this model isfeasible wi...For meeting the clinic needs in simultaneous pancreas and kidney transplantation (SPK), we success-fully establish a syngeneic SPK transplatation model in Lewis rats. The results indicate that this model isfeasible with a 82. 6% successful rate of operation and a 69. 6% survival rate in the first postoperativeweek. In long-term survived rats, the blood supplies are well established, function of the grafts (pancreasand kidney) maintains normal. This model is suitable for theoretical reserach in SPK transplantation for itsreasonable physiology with pancreatic juice drained into intestine and reduced postoperative complications inurinary tract and carbohydrate metabolism.展开更多
基金Supported by the Fund of Liaoning Provience Great Projection(0025001 ).
文摘Objective To investigate the effects of nitric oxide (NO) on reperfusion injury following pancreaticoduodenal transplanta- tion in rats. Methods The homologous male Wistar rat model of heterotopic total pancreaticoduodenal transplantation was used. The L-arginine (L-Arg) group received intravenous injection of L-Arg 5 minutes before and after reperfusion at a dose of 200 mg/kg while the N-Nitro-L-Arginine methyl ester (L-NAME) group received intravenous injection of L-NAME at a dose of 10mg/kg, and control group received saline. The amount of NO in the pancreas graft was measured. Serum concentration of cytokine-induced neutrophil chemoattractant (CINC) determined by enzyme-linked immunosorbant assay, expression of CINC mRNA detected by Northern blot assay, and myeloperoxidase (MPO) activity in the pancreas graft were measured. Histological observation was performed. Results The amount of NO in the L-Arg group was higher than in the control group, while in the L-NAME group was lower than in the control group (P < 0.05). The peak of serum CINC concentration occurred 3 hours after reperfusion with significant difference among groups. Expression peak of CINC mRNA in the pancreas graft occurred 3 hours after reperfusion. The expression level in the L-Arg group was lower than in the control group, the L-NAME group was higher than control group (P < 0.05). MPO activity in the L-Arg group obviously decreasd compared with other groups. The pancreas inflamma- tion was ameliorated in L-Arg group, and pancreas damage was aggravated in L-NAME group. Conclusions L-Arg can increase the amount of NO and inhibit the elevation of CINC, CINC mRNA expression, and early neutrophil accumulation in the transplanted pancreas. NO has protective effects on the ischemia/reperfusion injury of pancreaticoduodenal transplantation .
文摘Objective.To investigate the difference of rejection in single versus combined pancreas and kidney transplantation in rats. Methods.Allograft models including simultaneous pancreas and kidney(SPK)transplant and pancreas or kidney transplant alone were established in SD-Wistar rats, rejections of pancreas and kidney in different models were compared morphologically and functionally. Results.Mean survival time(MST)of pancreas was significantly prolonged in SPK than in pancreas transplant alone(PTA)(115 days vs. 92 days, P<005). Incidence of interstitial pancreatic rejection at grade Ⅱ and grade Ⅲ was much obvious in PTA than in SPK(429% vs. 125% at grade Ⅱ and 286% vs 63% at grade Ⅲ , P<005). No significant difference was found in MST between SPK and kidney transplant alone(KTA). Administration of cyclosporine A prolonged the MST of pancreas and kidney, without altering the tendency stated above. Conclusions.In SPK, the function of pancreas is protected by kidney hence the severity of rejection is reduced, whereas the function of kidney is not protected by pancreas. It suggests that different organs differ in immunoallergization and immunoregulation, and immune response tend to attack organs with greater immunoactivity, those organs with minor one could be protected. Cyclosporine A is effective on prolonging the MST of pancreas and kidney.
文摘The present study observed the mutual benefit role of liver and pancreas in combined hepaticopan-creatic transplantation in rats. The results indicated that pancreas, when transplanted with liver, could survive for a significant long time (13. 4±1.01 days) than it transplanted alone (9. 2±1.14 days) (P< 0. 05, t test). The interstitial rejection was mild and its rejection grade was significantly different from that of pancreas transplanted alone (P<0. 05, X2 test). The liver, when transplanted with pancreas, regenerated with strong competence and contact structure morphologically compared with liver transplanted alone. We think that pancreas could be immunologically protected against rejection and liver can be nutri-tionalized by pancreas in combined liver and pancreas transplantation.
文摘For meeting the clinic needs in simultaneous pancreas and kidney transplantation (SPK), we success-fully establish a syngeneic SPK transplatation model in Lewis rats. The results indicate that this model isfeasible with a 82. 6% successful rate of operation and a 69. 6% survival rate in the first postoperativeweek. In long-term survived rats, the blood supplies are well established, function of the grafts (pancreasand kidney) maintains normal. This model is suitable for theoretical reserach in SPK transplantation for itsreasonable physiology with pancreatic juice drained into intestine and reduced postoperative complications inurinary tract and carbohydrate metabolism.
