The pathogenesis of barium-induced severe myocardial necrosis in dietary potassum-depleted rats was investigated. In this study four experiments were performed. The results of these experiments suggest that there exist a complex pathogenesis of myocardial lesion produced by barium in condition of potassium deficiency. The main mechanism seems to be the direct stimulating effect of barium on myocardial contractibility. It seems unlikely that barium-induced constriction of coronary arteries, hypertension, hypokalemia, and increased catecholamine secretion are the basic mechanism of the myocardial necrosis. But these factors may play a promoting or aggravating role in the development of the myocardial lesion. Potassium deficiency not only acts as a conditioning factor for barium-induced myocardial necrosis, but also relatively increases the cardiotoxity of barium. This may be the principal pathogenesis of severe myocardial necrosis produced by barium in combination with potassium deficiency.

Objective:To investigate the relationship between poly(ADP-ribose)polymerase(PARP) inhibition and the growth activity of murine colon carcinoma CT26 cell lines in vitro.Methods:The murine colon carcinoma CT26 cell lines were treated with PARP inhibitior 5-AIQ in vitro.MTT assay was used to determine the growth activity of CT26 cells.The expressions of PARP and NF-?B p65 in the nuclei of CT26 cells were investigated by double labelling immunofluorescence and laser scanning cofocal microscope.Results:The inhibitory rates of the growth in 5-AIQ-treated colon carcinoma CT26 cell groups were 17.52%、27.63% and 39.93%,respectively.The inhibitory rate increased with the raising of the 5-AIQ concentration(0.1mmol/L,0.5mmol/L,and1.0mmol/L),and the difference was significant(P

The effects of nitrendipine (Nit) on myocardial contractility, myocardial succinate de-hydrogenase (SDH) and cytochrome oxidase (CCO) activities in streptozotocin (65mg/kg) diabetic rats were studied. Four weeks after the induction of diabetes, the rats were treated with Nit (30mg ?kg -2/day) for 4 weeks. The results showed that ventricular diastolic function was affected after 4 weeks of diabetes, and both ventricular diastolic and systolic functions were obviously involved after 8 weeks. These changes were significantly improved in diabetic rats receiving Nit treatment. The myocardial SDH and CCO activities in diabetic animals were markedly lower as compared to controls. The attenuation of these enzyme activities in diabetic rats was significantly reversed by administration of Nit. These findings suggest that Nit treatment may exhibit some beneficial effects on diabetic cardiomyopathy.

ObjectiveTo investigate the effect of down-regulating epidermal growth factor receptor (EGFR) expression on Bleomycin induced pulmonary fibrosis in mice.MethodsForty 4 ～6 week aged C57BL/c male mice were randomly divided into control,bleomycin,bleomycin plus EGFR RNAi groups and RNAi negative control group.Bleomycin group were treated with bleomycin (3 mg/kg) by endotracheal injection on day 0,control group were treated with PBS.And bleomycin plus EGFR RNAi group were received EGRF siRNA plus bleomycin intratracheal administration.RNAi negative control group received negative EGRF siRNA plus bleomycin intratracheal administration.Mice were sacrificed 10 days after the treatments.Hydroxyproline (HYP) assay was performed in the lung tissue.The lung tissue slides were examined pathologically with H.E.staining,and EGFR mRNA expression was detected by reverse transcriptasepolymerase chain reaction (RT-PCR) technique.Western blot were performed to identify the protein level.of total EGFR and phosphorylated EGFR.ResultsHistological examination of lung specimens demonstrated that EGFR siRNA administration lessened lung fibrosis induced by bleomycin and significantly reduced HYP content (543.00±25.89 vs 900.73±31.77,P＜0.01).EGFR mRNA (0.31±0.05 vs 0.75±0.08,P ＜0.01) and protein expression(1.53±0.47 vs 2.56±0.37,P ＜0.01) in EGFR siRNA-treated mice was significantly decreased.The expression of phosphorylation of EGFR protein (1.78±0.35 vs 2.84±0.51,P ＜0.01) and EGFR protein in RNAi group was less than in bleomycin group.Conclusions EGFR RNAi reduced the BLM-induced lung fibrosis by inhabiting EGFR activation.

ObjectiveTo study the clinical significance of serum type Ⅳ collagen( Ⅳ - C) levelsfor the diagnosis of hepatic fibrosis. MethodsSerum levels of Ⅳ - C were measured in 209 patientswith viral hepatitis and 53 healthy persons by ELISA. ResultsCompared with the normal group,the serum Ⅳ - C level was significantly increased in patients with chronic moderate hepatitis and wasthe highest in patients with chronic severe hepatitis and hepatic cirrhosis( P < 0.01 ). There was no sig-nificant difference in the serum Ⅳ- C level among acute viral hepatitis, chronic mild hepatitis and con-trols ( P >0.05). There was significant difference in the serum Ⅳ - C level in patients with hepaticcirrhosis by Child- Pugh grading( P < 0.01 ). The serum Ⅳ - C level was positively correlated withthe degree of hepatic fibrosis and the severity of hepatic diseases. ConclusionThe meastrement of serumⅣ- C may be useful for assessment of the degree of hepatic fibrosis and progrosis of chronic hepatitis.

In the current multimedia application of medical theory teaching there exist many problems such as infusion,relation estrangedness between teachers and students,the moral education marginalization,the abstract thinking ability attenuation and so on.Facing these problems,in the medical theory teaching,the multimedia application should take"help","reality","transfer"as the value pursue,and be located in the exaggeration atmosphere,the interest stimulation,induction inspiration,difficulty breakthrough,thought expansion and memory optimization,emotion cultivation and moral promotion.

Objective To understand the status of malaria prevalence in Shanghai,so as to provide the evidence for evaluat-ing and promoting malaria elimination. Methods The data of population,malaria endemic and monitoring in Shanghai from 2005 to 2012 were collected and analyzed. The malaria positive rates in febrile patients and normal population,the malaria antibody lev-els of the floating population and location pupils,and the species and density of mosquitoes were investigated and the results were analyzed. Results The blood examples from 400 177 febrile patients with 0.36%of the total population were examined for malar-ia,and the annual rates of blood examination varied from 0.15%to 0.83%in the period of 2005 to 2012. Before 2010,the annual blood examination rate was lower than 0.20%,but increased significantly since 2010 because of the implementation of the Action of Malaria Elimination in Shanghai from 2010 to 2020. Totally 604 malaria cases were found and the positive rate of blood examina-tion was 0.15%. During the period of 2006 to 2008,more than 100 malaria cases were found every year,but the number of malaria cases decreased since 2009,and only 26 cases was found in 2012. Since 2011,all the malaria cases have been found infected out of China according to the questionnaire investigation. The malaria positive rate of blood examinations decreased from 0.61% to 0.03%yearly. The proportion of local residents who had the blood examination was 79.02%,but that of the malaria positive in float-ing population was 83.44%. The active case detection was carried out in 15 759 persons and five cases were found in 2007 and 2008,respectively. The level of malaria antibody was tested in 1 239 440 floating population with the average positive rate of 0.04%. The level of malaria antibody was also tested in 7 065 local pupils but there was no positive for malaria. Only Anopheles si-nensis was found in Shanghai suburb,but no other Anopheles mosquitoes were found at the city or towns. The peak of Anopheles den- sity was from the end of July to August. Conclusions Malaria surveillance is carried out efficiently in Shanghai,and the result shows Shanghai is in the phase of malaria elimination. The more attention should be paid to persons coming from malaria endemic areas for the malaria blood examination and the general and advanced hospital should maintain the ability of malaria blood exami-nations simultaneously.

Autophagy and apoptosis are two kinds of important ways of neuronal death in cerebral ischemia.The interaction of both in ischemic penumbra may alleviate or aggravate cerebral ischemic injury.This article reviews the role of autophagy and apoptosis in cerebral ischemia and their potential regulating mechanisms of interaction.

Synergistic Innovation is the developing trend and requirements of the times and society.Southern Medical University practiced joint mode among colleges and universities for excellent medical talent cultivation.Based on preponderant discipline and taking mechanism innovation as the key points,Southern Medical University actively explored the diversification mode of synergistic innovation.