Objective To explore the preparation of liposomal clodronate and investigate its inducing effects on the apoptosis of peritoneal macrophages in rats after severe acute pancreatitis (SAP).Methods Liposomal clodronate was prepared by means of thin film. SAP rat model was established by retrograde injection of 5% sodium taurocholate into the pancreatic duct. The peritoneal macrophages were obtained from SAP rats. After exposure to different doses of liposomal clodronate (50, 100,150 μl), the PM proliferation was determined by MTT colourimetry. The apoptosis of PM was measured by flow cytometry and agarose gel electrophoresis, respectively. Results The prepared liposomal clodronate had a suitable encapsulation efficiency of clodronate (5.8%) with an average size of 200 nm. The spherical shape of liposome was confirmed by transmission electron microscope. Exposed to liposomal clodronate of different doses resulted in a obvious growth depression (P＜0.01). The apoptotic rate of the PM was (10.32±0.34) %, (18.16±0.49)% and (29.87±0.35)% in three different dose groups and the difference was marked (P＜0.01). 1.2% of agarose gel electrophoresis of DNA extracted from apoptotic macrophages induced by liposomal clodronate showed clearer and characteristic ladder following the liposomal clodronate concentration. Conclusion Liposomal clodronate has a definite effect on peritoneal macrophages in SAP rats.

Objective To investigate the protective effect of clodronate SPIO liposomes on liver injury of rats with severe acute pancreatitis(SAP)and the role of MRI in evaluating the extent of liver injury.Methods Superparamagnetic Fe3O4 nanoparticles were prepared by chemical coprecipitation.Clodronate-SPIO-containing liposomes was prepared by the thin-film method.SAP models were prepared by a uniform injection of sodium taurocholate(2 ml/kg body weight)into the subcapsular space of the pancreas.SD rats were randomly divided into control group,SAP plus SPIO group, and clodronate-SPIO-containing liposome group.Six hours after SAP models were available,T2-weighted MRI scanning(in the same plane)of the liver of rats in each group were performed.At the end of the scanning,blood samples were taken from the supcrior mesenteric vein to measure the contents of serum ALT and AST.Meanwhile, The pathological changes in the liver and pancreas were observed.Results Transmission electron microscopic examination showed that liposomes had a uniform size.No changes in the pancreas of rats in control group were noted.The pathological changes in the pancreas and liver of rats in SAP plus clodronate-SPIO-containing liposome group were significantly milder than those in SAP plus SPIO liposome group.The contents of serum ALT and AST in rats in SAP plus SPIO liposome group were significantly higher than those in control group(P＜0.01), while the contents of serum ALT and AST in rats in SAP plus clodronate-SPIO-containing group were significantly lower than those in SAP plus SPIO liposome group(P＜0.01).The MRI signal intensity of the liver in SAP plus SPIO liposome group and SAP plus clodronate-SPIO-containing liposome group was significantly lower than that in control group.The significant changes in the MRI signal intensity of the liver in SAP plus SPIO liposome group and SAP plus Clodronate-SPIO liposome group were noted(P＜0.01).Conclusion Clodronate-containing liposomes have protective effects against liver injury in SAP rats and SPIO can be used as a tracer for MRI examination.

Objective To investigate the protective effect of lipsomal clodronate against hepatic injury in rats with acute necrotizing pancreatitis (ANP). Methods 48 SD rats were randomly divided into control group, ANP group and lipsomal clodronate group, respectively. The models of ANP were established by injection of sodium taurocholate into the pancreatic capsule. Lipsomal clodronate was prepared by means of thin film. Blank liposomes and clodronate-containing liposomes was injected via caudal vein in ANP group and lipsomal clodronate group, respectively. The rats were sacrificed at 2, 6 h after ANP induction, the serum levels of ALT, AST and AMS, IL-6,IL-12 were measured, and pathologic changes of liver and pancreas were observed. Results At 6 h, serum level of ALT was (73 ± 11) U/L, (257 ± 33) U/L and (184 ± 29) U/L in control group, ANP group and lipsomal clodronate group, respectively;serum levels of AST were (190 ± 32)U/L, (590 ± 70)U/L and (430±52)U/L, respectively;serum levels of AMS were (814±80)U/L, (5031 ± 471) U/L and (2843 ± 236) U/L, respectively, serum levels of IL-6 were (26.7 ± 5.7) pmol/L, (218.0 ±4.7)pmol/L and (112.3 ± 8. O) pmol/L, respectively;serum levels of IL-12 were (4. 2 ± 1.0) pmol/L,(309.5 ± 8.5) pmol/L and (153.7 ± 6.3) pmol/L. The values in ANP group and lipsomal clodronate group were significantly higher than those in control group, while the values in lipsomal clodronate group were significantly lower than those in ANP group (P < 0. 01). Pathologic changes of liver and pancreas were significantly attenuated in lipsomal clodronate group. Conclusions Intravenous liposomal clodronate could exert protective effects on the hepatic injury in rats with ANP.

Objective To investigate the apoptosis of Kupffer cell (KC) induced by lipsomal clodronate in rat with acute necrotizing pancreatitis (ANP). Methods Lipsomal clodronate was prepared by means of thin film, the model of ANP was established by injection of 5% sodium taurocholate of 4 ml/kg into the pancreatic capsule. The Kupffer cells were obtained from ANP rat. After exposure to different doses of lipsomal clodronate (0, 50, 100, 150 μl) , then the proliferation and apoptosis of KC was measured by MTT, flow cytometry and agarose gel electrophoresis of DNA. Results The prepared lipsomal clodronate had an average size of 100～200 nm, the spherical shape of liposome was uniform and confirmed by transmission electron microscope. When exposed to different concentration of lipsomal clodronate for 24 h, the growth suppression rate was 17. 4% , 24. 2% and 31. 1% , respectively, while the apoptosis rate of the KC was (14. 12 ±0.37)% , (18.74±0.43)% and (27.51 ±0.39)%, respectively; the difference was statistically significantly (P<0. 01) , the DNA of KC began degradation and gradually showed clear and characteristic ladder. Conclusions Lipsomal clodronate could induce apoptosis and suppress the growth of Kupffer cells in ANP rats.

Objective To investigate the protective effects of lipsomal clodronate on renal injury in rats with severe acute pancreatifis and the assessment of renal injury. Method Totally 48 rats were randomly divided into three group:normal control group (C);SAP group, in which rats were treated with pure liposomal (P);treatment group, in which SAP rats were treated with liposomal clodronate disodium(T). The SAP model of rat was induced by injection of 5 % sodium taurochohte beneath the pancreatic membrane. Rats of normal control group received isovolumetric injections of 0.9% physiological saline solution instead of sodium taurocholate. Blood samples were collected to measure AMS,BUN,Cr,IL-6 and IL-12 at 2 hors, 6 hours after SAP. At the same time, the samples of pancreatic and renal tissues were taken for observing the pathological changes. Results Compared with controlgroup, serious renal and pancreatic damages were found in group P, and the AMS, BUN, Cr levels elevated signifi-candy (P < 0.01). Compared with group P,the renal and pancreatic damages were attenuated in group T, and the levels of Cr and AMS decreased significantly (P < 0.01), and the IL-6, IL-12 were decreased at 2 hours and 6 hours (P < 0.01). The BUN decreased significantly at6 hours (P < 0.05). Conciusions Excessive release of inflammatory mediator play an important role in renal injury in SAP. Lipsomal clodronate disodium can alleviate the damage of pancreas and kidney.

Quality management and control of single disease is a means to continuously improve medical quality and safety by building a set of quality control indicators and evaluation systems based on the whole process of disease diagnosis and treatment. In the actual single disease management process, the reporting of each disease involved data from various systems such as electronic medical records, and the data integration was difficult. While the traditional manual reporting method took a lot of time and the data accuracy could not be guaranteed. In the development process of hospital informatization, a hospital has designed a set of intelligent full-closed loop single disease management platform based on the hospital information system, by integrating the existing human and information data resources of the hospital. This platform integrated functions of single disease intranet reporting, in-depth capture of reporting elements, single-disease quality index management, and single-disease real-time intelligent control, in order to promote more refined and intelligent disease management and thus steadily improve medical quality and safety.

Objective:To improve the understanding of adult primary hemophagocytic syndrome (HPS) with aggressive natural killer cell leukemia (ANKL).Methods:The clinicopathological data of one adult patient with suspected primary HPS complicated with ANKL in Huiqiao Medical Center, Nanfang Hospital of Southern Medical University in October 2017 were retrospectively analyzed, and literatures were reviewed.Results:A 21-year-old male patient presented with persistent fever, hemocytopenia, splenomegaly, low fibrinogen, a significant increase in ferritin, hemophagocytes in bone marrow, decreased natural killer (NK) cell activity, and increased soluble CD25. Flow cytometry detection showed that the expression of NK cells was abnormal, and there were familial lysosomal trafficking regulator (LYST) and UNC13D gene defects. He was suspected of primary HPS complicated with ANKL. The patient was given 4 courses of EPOCH+PEG-Asp (etoposide, dexamethasone, vindesine, cyclophosphamide, doxorubicin hydrochloride liposome, pegaspargase) regimen chemotherapy, 20 mg of citalopidine twice a week maintenance therapy and matched unrelated hematopoietic stem cell transplantation. After 35 months of follow-up, he got sustained remission.Conclusions:Even if there are secondary causes of adult HPS, it is necessary to screen out related genes to avoid misdiagnosis. HPS patients with ANKL progress rapidly, and the early mortality is high. EPOCH+ PEG-Asp regimen induction therapy and allogeneic hematopoietic stem cell transplantation should be used as early as possible after diagnosis.