10.3969/j.issn.1000-3606.2013.06.004

Objective To study the expression of CDK4 andβ-Catenin and their relevance in glioma. Methods We used immunohistochemistry to detect the expression of CDK4 andβ-Catenin in forty-five glio-ma tissues and eight normal tissues.According to the classification standard of WHO in 2000 classify and grade the tissues.Results There were significant differences of CDK4 andβ-Catenin expressions between normal tis-sues and glioma tissues(P<0.01).The expression of CDK4 and β-Catenin had positive correlation with the pathological grades of glioma and histological type and increased(P <0.05).Furthermore,the expression of CDK4 was positively correlated with the expression ofβ-Catenin in glioma(r=0.52,P<0.01).Conclusion The increased expression of CDK4 andβ-Catenin may have correlation with malignant change of glioma and oc-curance of glioblastoma,and their combination is expected to become an important indicator in assessing malignant glioma.

Spontaneous splenic rupture in acute leukemiapatients was rarely seen and the prognosis was ex-tremely bad. In this article the authors discussedthe early diagnosis, mechanism and treatment ofsplenic rupture in acute leukemia patients on thebasic of 3 cases treaed in our hospital. The authorsrecognized that it was a useful diagnostic methodto chech up with "B" model utrasound wave andthat to conduct splenectomy was an effectivemethod of live-saving treatment.

Objective To characterize the effects of AQP1 expression on kidney damage in rat disseminated intravascular coagulation(DIC) caused by lipopolysaccharide(LPS) dosing. Method Fifty male Wistar rats (clean grade) were randomly assigned into 5 groups of 10 rats. The 10 control rats were dosed with 10 ml of 0.9%NaCl solution by a drip via the vena caudalis within 4 h, and blood and tissues were obtained after treatment completion. In the DIC groups, the rats were dosed with LPS (30 mg/kg body weight in 10 ml of 0.9% NaCl solution) by a drip via the vena caudalis within 4 h, and blood and tissues were obtained at 4, 6, 8 and 10 h. The blood platelet(PLT) count, prothrombin time(PT) , activated partial thromboplastin time(APTT), fibrin(FIB) and D-dimer(D-D) were detected. Hematoxylin and eosin(HE) staining was used to examine the pathologic changes in the lung and kidney tissues of each group (both hematologic parameters and tissue pathologic changes were used to judge the course of DIC). The AQP1 gene expression levels in the kidney tissues from the groups were evaluated by the mRNA levels using RT-PCR. Statistical analyses were performed by the SNK- q method. Results The PLT count, PT, APTT, FIB and D-D examinations revealed remarkable changes in all DIC groups compared with the control group (P < 0.01). The AQP1 mRNA level was significantly decreased in the DIC group at 4 h compared with the control group (P < 0.01) , and further decreased to the minimum level in the DIC group at 6 h. Moreover, cloudy swelling of renal tubular cells was observed at 6 h and cell degeneration and necrosis were observed at 8 h among the DIC groups. Conclusions Downregulation of AQP1 mRNA expression occurred before damage to the renal tubular cells in DIC, indicating that AQP1 expression may be involved in the kidney damage observed in rat DIC.

Objective To identify the glycometabolism features ofC57BL/Ksj db/+ mice at gestational period and provide the evidence for the mice used as the animal model of gestational diabetes mellitus (GDM).Methods Ten C57BL/Ksj db/+ female mice and ten wild female mice were randomly selected and mated with wild male mice respectively.Day 3 before mating,days 6,11 and 17 of pregnancy,and day 6 after delivery represented pre pregnancy,early-pregnancy,mid-pregnancy,late-pregnancy and post-pregnancy periods,respectively.The levels of glucose tolerance and fasting insulin of female mice were compared at progestation,different gestational periods and puerperium between the two groups.Days 6,11,14,17 and 20 (before labor) of pregnancy served as five time-points of pregnancy,leptin levels of female mice of the two groups were dynamically monitored during pregnancy,and analyzed at different gestational ages.The data were analyzed by Tukey test of one-way ANOVA.Results (1) Compared with the normal pregnant mice,the levels of glucose tolerance of C57BL/Ksj db/+ female mice were significantly decreased,while the levels of fasting insulin were dramatically increased with the progression of pregnancy [day 6 of pregnancy,(8.6 ± 0.6) mU/L vs (7.5 ±1.1) mU/L; day 11 of pregnancy,(9.8±0.6) mU/L vs (8.5± 1.1) mU/L; day 17 of pregnancy,(10.4±0.8) mU/L vs (9.9±0.5) mU/L; t=1.859,4.056 and 3.078,P=0.085,0.000 and 0.000] and recovered to the pre-pregnancy level after delivery.(2) The level of leptin in serum of C57BL/Ksj db/+ pregnant mice was significantly higher than that at non-pregnant period [pre-pregnancy and days 6,11,14,17 and 20 of pregnancy:(911.0±238.8) ng/L,(1 342.2± 132.3) ng/L,(1 821.9±238.2) ng/L,(1 816.3± 142.3) ng/L,(1 752.4± 126.6) ng/L,and (1 926.4±61.6) ng/L,respectively; t=3.887,8.210,8.161,7.585 and 9.153,P=0.005,0.000,0.000,0.000 and 0.000],but showed no apparent change with the gestational ages after mid-gestation.Conclusion Changes of glycometabolism and the levels of leptin and insulin of C57BL/Ksj db/+ pregnant mice during pregnancy are similar to those of GDM patients,the levels of fasting insulin are dramatically increased with the progression of pregnancy,and return to normal after delivery,the level of leptin is higher than that at non-pregnant period,but is not correlated with the gestational ages.C57BL/Ksj db/+ pregnant mice can be used as the animal model of GDM.

Objective To study the relationship between expression of G-protein-coupled bile acid receptor 1 (GPBAR1) in gallbladder mucosa and formation of lithogenic bile in patients with gallstones.Methods Gallbladder mucosa,gallbladder wall,bile and plasma were collected from 34 patients with gallstone (GS) and 15 individuals who were gallstone free (GSF).The gallbladder wall was stained with hematoxylin-eosin (HE) and immunohistochemistry to detect pathologic changes and expressions of GPBAR1,mucin 1 (MUC1) and mucin 5AC (MUC5AC).Reverse-transcription polymerase chain reaction (RT-PCR) was used to test mRNA expressions of GPBAR1,MUC1 and MUC5AC in the gallbladder mucosa.The contents of total cholesterol (TC),total bile acid (TBA),triglyceride (TG),low density lipoprotein (LDL) and high density lipoprotein (HDL) in plasma and cholesterol,TBA,phospholipid (PL) and mucin in the bile of gallbladder were measured.Results The gallbladder mucosa in all GS patients showed chronic inflammation on hematoxylin-eosin staining.The expressions of GPBAR1 and MUC5AC were more markedly increased in the GS group than in the GSFgroup (61.34±8.06 vs.43.05±7.83,P＜0.01; 52.11±9.62 vs.45.05±9.27,P＜0.05).The mRNA expressions of GPBAR1 and MUC5AC in the GS group were also more markedly increased than in the GSR group (0.87±0.07 vs.0.80±0.09,P＜0.05; 1.04±0.22 vs.0.8±0.17,P＜0.01).Serum cholesterol,as well as biliary cholesterol,cholesterol mol percentage,cholesterol saturation index and mucin in the GS group were more significantly higher than in the GSF group (5.07±1.64 vs.3.62±1.42,P＜0.01; 17.23±3.67 vs.12.47±2.31,P＜0.01; 7.47±0.65 vs.5.05±0.24,P＜0.01; 1.03±0.58 vs.0.69±0.38,P＜0.01; 92.02±20.89 vs.76.36±19.71,P＜0.05).Biliary total bile acids and bile acids mol percentage were lower in the GS group than in the GSF group (162.68±20.19 vs.180.21±26.05,P＜0.05; 71.28±1.84 vs. 73.29±0.96,P＜0.01). In the GS group,there were negative correlations between the mRNA expression of GPBAR1 and biliary TBA (γ=-0.341,P＜0.05).There were negative correlations in the GS group between the GPBAR1 expression and the level of biliary TBA (γ=- 0.403,P＜0.05),and between the GPBAR1 expression and the level of biliary total lipid (γ=-0.365,P＜0.05).Conclusions This study shows an increase in expression of GPBAR1 in gallbladder mucosa in patients with GS.It is suggested that GPBAR1 may accelerate formation of lithogenic bile by inducing re-absorption of bile acid.

Objective To analyze the effects of Cavity Preparation Skill Evaluation System (CPSES) in pre-clinical dental cavity preparation assessment.Methods Twenty one dental undergraduates in Medical School of Nankai University were chosen in this study.After cavity preparation training,students' cavity preparation skills were evaluated systematically.The outline form and depth of 21 left mandibular first molar class Ⅰ cavity preparation made by students were evaluated by CPSES system and evaluators' visual assessment.The evaluation results were analyzed using GraphPad InStat statistical software(V3.1) with paired t test (test level α=0.05) and correlation analysis to study the application effects of the CPSES system.Results The evaluation results generated from CPSES system and evaluators' visual assessment for class Ⅰ dental cavity preparation skill evaluation showed significant difference(two tailed P value 0.0050,t=3.156) and certain correlation on cavity preparation assessment(two tailed P value 0.0837,r=0.386 2).Conclusion Application of cavity preparation skill evaluation system in undergraduate endodontic teaching can deepen and strengthen the students' understanding of cavity preparation requirements and help students master cavity preparation knowledge and skills better.

OBJECTIVE To investigate the rescue and treatment of critical children with tracheobronchial foreign body. METHODS From June 2011 to June 2015,there were 2489 children with tracheobronchial foreign bodies treated in Children's Hospital of HeBei Province, among which 11critical children who were rescued as soon as they came to the hospital. The clinical data of the 11critical children were analyzed. RESULTS All the 11 critical cases endured dyspnea of third degree or more severe and presented severe hypoxia, in which 2 children had been performed tracheal intubation before they came to the hospital and 1 child even showed the symptom of respiratory and cardiac arrest. Among these critical cases, the foreign body was removed directly without anesthesia in 1 child. The other 2 children with severe pneumothorax, mediastinal emphysema and subcutaneous emphysema in neck and chest area were treated by excision and drainage of emphysema firstly, and then the foreign bodies were extracted through bronchoscope after general anesthesia. The another 8 children were performed operations of extraction of bronchial foreign body and then the foreign bodies were taken out. All the 11 critical children were rescued successfully and no death cases happened. CONCLUSION Rapid diagnosis and rapid removal of foreign bodies is the key to save the lives of critical children with tracheobronchial foreign bodies.

Objective: To explore the impact of ticagrelor on platelet aggregation in patients with acute coronary syndrome (ACS) after percutaneous coronary intervention(PCI). Methods: A total of 98 ACS patients received PCI in our hospital from 2015-01 to 2015-12 were enrolled. The patients were randomly divided into 2 groups: Clopidogrel group, the patients received oral clopidogrel 300mg at first time and then maintained by 75mg/qd, n=48 and Ticagrelor group, the patients received oral ticagrelor 180mg at first time and then maintained by 90mg/bid, n=50. All patients were treated for 12 months.The level of vasodilator stimulated phosphoprotein (VASP) phosphorylation and platelet reactivity index (PRI) at pre-medication and 24h, 7 days and 1 month after PCI were detected; major adverse cardiovascular events (MACE) and bleeding events were recorded within 1 month after PCI, the incidence of platelet aggregation, MACE and bleeding events were compared between 2 groups.Results: The baseline information and PCI condition were similar between 2 groups, P>0.05. The overall average PRI was different between 2 groups, P<0.001 and PRI at each time point was different between 2 groups, P<0.001, different group and time point had interactive effect on PRI, P<0.001. Compared with Clopidogrel group, Ticagrelor group had the lower ratio of PRI≥50% at different time points after PCI, P<0.001. The incidence of MACE and bleeding event were similar between 2 groups within 1 month after PCI, P>0.05. Conclusion: Ticagrelor was superior toclopidogrel for anti-platelet aggregation in ACS patients after PCI, it didn't increase bleeding events.

Objective To evaluate the effect of nimodipine on the activity of calcineurin (CaN) in the hippocampus of aged rats.Methods Sixty healthy male Sprague-Dawley rats,aged 18 months,weighing 550-650 g,were divided into 2 groups (n=30 each) using a random number table:surgery group (group S) and nimodipine group (group N).Nimodipine 1 mg/kg was intraperitoneally injected in group N,while the cqual volume of normal saline was given instead in group S,and 30 min later exploratory laparotomy was performed.Ten rats in each group were randomly selected on 1 day before operation and 3 and 7 days after operation,and Morris water maze test was performed.After the end of Morris water maze test,10 rats were selected and sacrificed,brains were removed,and hippocampi were isolated for detection of apoptosis in hippocampal neurons (by flow cytometry) and expression of CaN,phosphor-BAD (p-BAD) and caspase-3 in hippocampal tissues (by Western blot).Apoptotic rate was calculated.Results Compared with the value at 1 day before operation,the escape latency was significantly prolonged,the frequency of crossing the original platform was decreased,the time of staying at the platform quadrant was shortcned,apoptotic rate was increased,and the expression of CaN,p-BAD and caspase-3 in hippocampal tissues was up-regulated at each time point after operation in group S (P＜0.05).Compared with group S,the escape latency was significantly shortened,the frequency of crossing the original platform was increased,the time of staying at the platform quadrant was prolonged,apoptotic rate was decreased,and the expression of CaN,p-BAD and caspase-3 in hippocampal tissues was down-regulated at each time point after operation in group N (P＜0.05).Conclusion The mechanism by which nimodipine inhibits apoptosis in hippocampal neurons and reduces postoperative cognitive dysfunction may be related to inhibition of CaN activation in aged rats.