Objective:to research how to implement early diagnosis for the hepatom model when the rats are alive.Methods:40 young male Wistar rats(30～40 d)were randomly divided into two groups,20 rats in each group(the control group and the interruptedly low doses experimental group).The control group was fed with physiologic saline for 20 weeks.The interruptedly low doses experimental group was fed with 0.2%diethylnitrosamine(DENA)at a dose of 10 mg/kg every week 5 times.The experimental group was induced for 15 continuous weeks.All of them were sacrificed at the 20th week when the rats were inspected by MRI and weighed.The histological changes of liver tissue were observed under microscope.The levels of liver function and?-foetoprotein(AFP)were recorded。all the factors were put into a logistic regression model for multivariate analysis.Results:the induction achievement ratio of hepatoma model in Wistar rats was 85%.The correct rate of MRI for hepatoma was 94.1%.With multivariate analysis,only 1 of the 7 variables in the final logistic regression model was statistically significant:alanine aminotransferase(ALT).Conclusion:Through giving rats low doses of DENA interruptedly and performing MRI for inspecting pathological changes of rat livers with anomaly increased levels of plasma ALT,we can implement early diagnosis for the hepatom model to decrease the rate of death and extrahepatic metastasis when fund and time is limited.

The author of the article makes all-around expectation of continuous medical education development in our country from the ten aspects such as its role in medical reform and medical development,perfecting its construction,intensifing the demand-orientation,making scientific and informationized management.improving the quality of education and modernization of its means,conducting theoretical and practical study to generalize new theory and methods and promoting the international communication and cooperation.

Objective To investigate the intervening effects of Ganoderma spore on the decrease of cell proliferation and neuronal survival in the hippocampus of fetal and postnatal rats induced with gestational hypertension. Methods Fourty SD pregnant rats were divided into four groups including the control group,Nw-nitro-L-arginine methylester(L-NAME)+distilled water(DW) group,L-NAME+L-Arginine group and L-NAME+Ganoderma spore(GS) group.The hippocampal tissue of the brain was detected by immunohistochemistry,Western blotting,RT-PCR,flow cytometry and electron microscopy. Results After the application of L-NAME,the expressions of hypoxia inducing factor-1?(HIF-1?) and vascular endothelial growth factor(VEGF) were increased at the hippocampus of E21 brain and continued up to P30 brain.The microvessel density of E21 hippocampus was increased and the structural abnormalities of blood capillary at P30 hippocampus were showed.The cell proliferation was decreased at E21 hippocampus and so was the neuronal number at P30 hippocampus.With the administration of Ganoderma spore,HIF-1? and VEGF were down-regulated at E21 hippocampus and were not detected at P30 hippocampus.The microvessel density of E21 hippocampus reached a normal level and the blood capillary ultrastructure of P30 hippocampus was restored.The cell proliferation of E21 hippocampus and neuronal number of P30 hippocampus were recuperatively increased.Conclusion Ganoderma spore may prevent the decrease of cell proliferation and neuronal survival in the hippocampus of fetal and postnatal rats induced with gestational hypertension.

Autologous liver transplantation,a type of ex situ liver surgery along with hypothermic organ preservation,a venovenous bypass and complicated vascular reconstructions,allows better access to unresectable tumor and is considered as an effective strategy to overcome the shortage of donors.However,the high complication incidence and mortality related with the technique limit its wide application.To popularize this technique,based on our current experience,we review the key parts of the surgery and the treatment strategy for the complications.

Currently,China lacks enough public health physicians and the quality of them varies much.In order to solve this problem,proving the access to public health physician is necessary.On the basis of literature research,this essay summarizes the existing problems of the access to public health physicians:improper professional education in university,curriculum setting and provision about physician registration.The essay argues that it is a feasible way to improve the access of public health physicians in China by further piloting and perfecting the unified post-graduation standardized training system,implementing curriculum reform to enhance students' practical ability and building network physician registration.

Objective To optimize the preparation technology of transcription activator (TAT) and polyethylene glycols (PEG) co-modified tilianin-loaded composite phospholipid liposome (TAT & PEG tilianin CPL, T&PTCPL) and investigate its protective effect on cardiomyocytes. Methods The composite phospholipid liposome was prepared by thin film-ultrasonic method. A three- factor, three-level Box-Behnken experimental design was employed. The weight ratio of total phospholipid to tilianin (X1), the concentration of DSPE-PEG2000-TAT (X2), and hydration volume (X3) were observed. The encapsulation efficiency (Y1), particle size (Y2), and polydispersion coefficient (Y3) were evaluated to optimize optimal formula. In addition, hypoxia/reoxygenation model was established with Na2S2O4 in H9C2 cells. Superoxide dismutase (SOD) activity, malonaldehyde (MDA) level and release of lactate dehydrogenase (LDH) and creatine kinase-MB (CK-MB) were assessed to evaluate the effect of T&PTCPL, meanwhile, the in vitro release rate (dynamic dialysis method) and absorption rate of tilianin and T&PTCPL in Caco-2 cell were examined. Results The optimal formula was as following: X1 = 20, X2 = 1.7%, and X3 = 3.2 mL; The encapsulation efficiency was (86.62 ± 2.51)%, particle size was (149.7 ± 8.2) nm and PDI was 0.15 ± 0.05. Compared with model group, T&PTCPL and tilianin groups increased SOD activity, inhibited level of MDA, LDH and CK-MB leakage (P < 0.05), and the effect of T&PTCPL group was better than tilianin group, meanwhile, T&PTCPL was completely released at 48 h, with a cumulative release of 88.65%, and Caco-2 cells had better absorption of T&PTCPL. Conclusion The Box-Behnken design is suitable for optimizing the formulation of T&PTCPL, and the observed responses are in close agreement with the predicted values of the mathematic models; Moreover, T&PTCPL shows a better sustained release effect in vitro release, which promots the absorption of tilianin in Caco-2 cells and suggests that T&PTCPL may have protective effect on myocardial ischemia reperfusion injury.

Background Hypoxia is an important cause resulting in many retinal diseases,such as retinal edema,diabetic retinopathy,proliferative retinopathy and so on.ObjectiveThis study is to investigate the effects of hypoxia on the expression of AQP-4 in Müller cells in vitro.MethodsMüller cells were isolated from New Zealand white rabbits and primarily cultured in DMEM containing 20% fetal bovine serum by the explant culture method.The cells were identified by immunostaining for the glial fibrillary acidic protein(GFAP).Generation 2 of cells was cultivated with the chemical hypoxia inducer,CoCl_2,for 24 hours in the hypoxic group and only with DMEM in the control group.The expression of the AQP-4 protein in Müller cells was detected by immunocytochemistry.The expression of AQP-4 mRNA was determined by semi-quantitative reverse transcription-polymerase chain reaction (RT-PCR).ResultsAbout 90% of Müller cells(generation 2) presented a positive immunoreactivity for GFAP,showing a brown staining in the cytoplasm.Cultured cells displayed the presence of intermediate filaments,microvillus and various cellular organs.The Integralabsorbance of the AQP-4 protein in Müller cells was markedly increased 24 hours after incubation with CoCl_2 in comparison with the control group (t=6.74,P＜0.05).The expression level of AQP-4 mRNA in Müller cells was significantly enhanced 24 hours after incubation with CoCl_2 in comparison with the control group (t=21.79,P＜0.05). ConclusionHypoxia enchances the expression of AQP-4 in Müller cells and further increases fluid accumulation in the retina.These results suggest that Müller cells play an important role in the formation of retinal edema in diabetic retinopathy or proliferative retinopathy.

Objective To investigate transfusion transmitted virus (TTV) infection among population of different groups in Shaanxi Province. Methods A nested polymerase chain reaction (PCR) with primers from ORF1 of TTV genome was established to detect TTV-DNA in serum of the patients. ResultsTTV-DAN was detected in the sera of 3 of 50 cases of general population(6％), 2 of 30 cases of vocational blood donors(6.7%),21 of 97 cases with Type B hepatitis (21. 6％), 9 of 35 cases of Type C hepatitis (25. 7％),and 23 of 40 cases with non-A～ non-G hepatitis (57.5 ％ ). ConclusionThere is TTV infection among general population in Shaanxi Province. TTV may be an impor- tant agent to cause non-A～non-G hepatitis. And the patients with HBV or HCV can have overlapping TTV infection.

Objective:To study the clinical application and postoperative complication of double stapling technique (DST) in anus-preserving operation of low and middle rectal cancer. Method:From April 2002 to April 2006, clinical data of 75 cases with low and middle rectal cancer were analyzed retrospectively. Of those 32 cases used DST underwent sphincter-reserving operation(SPO),regard as study group;and 43 cases used SST received SPO, as control group. Clinical pathologic parameters、 postoperative complication and tumor recurrence were compared between the two groups. Results:Operation of all the 75 patients was successful without operative mortality. In DST group patients, defecation function was different from SST group after postoperative 3 and 6 months (P

OBJECTIVE:To understand features of ADR in our hospital and to promote rational clinical drug use.METHODS:A retrospective method was adopted in which 557 ADR cases collected in our hospital in 2004 were analyzed from aspects of reporters,drug categories,routes of administration,the top 10 ADR-induced drugs and etc.RESULTS:Antibacterial and the traditional Chinese medicine injectable preparation dominated the first place and the second place respectively on the list of ADR report cases;55.83%of the ADR cases was induced by IV drop drugs;Clindamycin injection has the highest incidence rate of ADR;63.91%ADR cases were come from pharmacists.CONCLUSION:Carrying out ADR monitoring work is an important task for medical institutions,the strengthening of ADR monitoring can ensure safe drug use of patients.