Objective:To investigate the methyl-CpG-binding protein 2 (MeCP2) expression in specimens of pancreas cancer tumor and para-cancerous tissues and its prognostic value.Methods:The tissue microarray and immunohistochemistry were used to examine the MeCP2 expression in 59 cases of pancreatic cancer tumor tissues and 53 adjacent normal tissues. The correlation between the MeCP2 expression and clinicopathological characteristics of pancreas cancer patients was analyzed. Furthermore, the survival curve was drawn by Kaplan-Meier method and the Cox regression hazards model was used to study the prognostic value of MeCP2 expression in pancreas cancer.Results:The MeCP2 positive expression rate in 59 pancreas cancer tumor tissues was 47.5%, which was 67.9% in 53 adjacent tissues. The MeCP2 positive expression rate in adjacent tissues was obviously higher than that in pancreatic cancer tissues, and the difference was statistically significant ( P<0.05). The MeCP2 positive expression was significantly associated with pathological grade and lymph node metastasis(both P<0.05). The overall survival in patients positive for the MeCP2 expression was longer than that in those with negative MeCP2 expression( P<0.05). Cox multivariate analysis demonstrated that the level of MeCP2 expression was an independent predictor for prognosis in patients with pancreas cancer. Conclusions:MeCP2 is obviously positively expressed in para-cancerous tissues, but was lowly expressed in pancreatic cancer, indicating that MeCP2 detection can help to evaluate the prognosis of pancreatic cancer patients.

BACKGROUND: Calcitonin gene-related peptide(CGRP) can relieve myocardial ischemia-reperfusion injury. Because adrenomedulin(Adm) and CGRP share certain structural homology, it is assumed that Adm might have protective effect on myocardium.OBJECTIVE: To investigate Adm' s inhibitory effect on vascular cell adhesion molecule-1 (VCAM-1) expression in ischemia-reperfusion rats and its protective effect on myocardial ischemia.DESIGN: A randomized paired design using ischemia-reperfusion model of SD rats.MATERIALS: The experiment was conducted in the Experimental Animal Center of Xianning Medical College from December 2003 to May 2004. Twenty-four healthy male SD rats were selected.METHODS: The hearts of the rats were removed to make into ischemia-reperfusion model and then randomized to control group, Adm1-50(1× 10-9) mol/L group, Adm1-50(1 × 10-8) mol/L group and Adm1-50(1 × 10-7) mol/L group. After the hearts underwent ischemia for 60 minutes, the hearts in control group were reperfused with oxygenation Kerbs-Henseleit bicarbonate(KHB) for 60 minutes while those in the other three groups had reperfusion with oxygenation KHB and Adm1-50( 1 × 10-9),(1 × 10-8), and(1 × 10-7) mol/L, respectively, for 15 minutes and KHB perfusion for another 45 minutes. The liquid flowing from the coronary artery was collected, and the content of creatine kinase isoenzyme was detected. Myocardium in the left ventricle was collected for RNA extraction, and the expression of VCAM-1m RNA was determined with reverse transcription-polymerase chain reaction method.MAIN OUTCOME MEASURES: The expression of myocardial VCAM-1mRNA in control group and groups of different concentrations of Adm1-50.RESULTS: After electrophoresis, each group was found to have an obvious amplified band at 194bp, which was GADPH mRNA amplified segment, and the expression of GADPH mRNA in each group was the same. VCAM-1 mRNA amplified segment with strong brightness and clear border was found at 334bp in control group and Adml-50 (1 × 10-9) mol/L group. The brightness of VCAM-1 mRNA amplified band decreased significantly in Adm1-50(1 × 10-8) mol/L group whereas slight brightness and obscure amplified band was found in Adm1-50(1 × 10-7) mol/L group. The gray value of amplified VCAM-1mRNA and GAPDH mRNA in Adm1-50(1 × 10-8)group and(1 × 10-7) mol/L group was 0.6 ±0.31 and 0.5 ±0.36, respectively, which was obviously lower than that in control group( 1.2 ± 0. 52) ( P＜ 0. 05).CONCLUSION: Adm1-50 may inhibit the expression of myocardial VCAM-1mRNA in myocardial ischemia-reperfusion in a dose-dependent manner.

Aim To study the protective effect of the compound flavones on chronic alcohol induced testicu-lar damage in mice. Methods One hundred SPF C57 BL/6 mice were randomly divided into 5 groups:normal control group, chronic alcohol group, alcohol+low-dose drug group, alcohol+high dose drug group, and drug control group. Chronic alcohol testicular inju-ry model in mice was established by intragastric admin-istration of increasing dose of alcohol every four weeks for 6 months, meanwhile compound flavone interven-tion was in process. The activity of super oxide dis-mutase( SOD) , the levels of malondialdehyde( MDA) and testosterone in testicular tissue were measured. HE staining was used to observe testicular histomorpholo-gy, and ultrastructure changes were detected by elec-tron microscope. Results In chronic alcohol group, MDA content was obviously increased, while SOD and testosterone levels were decreased compared with nor-mal control group ( P <0. 05 ) . In addition, germinal epithelium, support cells and sperm production at all levels showed degraded degeneration in chronic alcohol group. However, compound flavonoids could success-fully reverse alcohol-induced testicular damage in a dose-dependent way. Conclusion The compound of flavones may have therapeutic potential for alcohol-in-duced testicular injury through inhibiting lipid peroxi-dation and increasing the level of testosterone.

Aim To investigate the influences on the aortal structure of rats with long-term high fat forages diet.Methods 14 SD rats were divided into two groups:the control group and the test group. The test rats were fed with high fat forages.12 weeks later, the aortas of the rats were observed with a light microscope, transmission electron microscope(TEM) and scanning electron microscope (SEM).Results In the test group, the aortic tunica intima thickening, endotheliocyte injury and monocyte adhesion were found with a light microscope; the elastic lamina being broken and the smooth muscle cells proliferated. Under TEM, the endothelial cell membrane of the aorta in the test rats was destroyed and appeared to be worm-eclipsed shape.Mitochondria exhibited swelling,vacuole degeneration and its cristae was dissolved, broken or some disappeared.Rough endoplasmic reticula (RER) expanded. The endothelial cell spaces were enlarged and the cell junctions deformed. Monocytes adhering to the endothelial cell stretched out pseudopodia and intruded into the endothelial crevice and the subendothelial layer. Some basement membranes completely sloughed following with endothelial cell. ERE and ribosomes increased in smooth muscle cells. SEM observation showed that the endothelial cells became swelling and the surface of endothelial cell was worm-eclipsed or crater shape. There were deeper crevices between endothelial cells.Conclusions Long-term high fat forages diet can induce injury of the endothelium and elastic lamina, adhesion of the monocytes and its intrusion into endothelial layer and subendothelial layer, proliferation of the subendothelial layer and smooth muscle in the aorta of rats.

Aim To investigate the effects of Ginkgo biloba extract(EGB)on tumor necrosis factor-alpha(TNF-?)in TNBS-induced colitis in rats and its mechanisms.Methods Colitis in rats was induced by colonic administration with 2,4,6-trinitrobenzene sulfonic acid(TNBS).Wistar rats were randomly divided into four groups,10 in each:normal group,model group,5-aminosalicylic acid(5-ASA group)and Ginkgo biloba extract group(EGB group).The levels of nitric oxide(NO),and glutathion peroxide(GSH-Px)were measured by biochemical methods.The expressions of TNF-? and nuclear factor kappaBp65(NF-?Bp65)in the colon tissues of colitis rats were detected by means of immunohistochemistry.The expressions of induce nitric oxide synthase(iNOS)in the colon tissues of colitis rats were detected by reverse transcription polymerase chain reaction(RT-PCR).The effects of EGB on colonic inflammation and macroscopic and histological damage were evaluated as well.Results Compared with the model group,treatment with EGB for 4 weeks significantly reduced colon macroscopic and histological damage,elevated the activities of GSH-Px and reduced the contents of NO,inhibited the protein expressions of TNF-? andNF-?Bp65,and decreased the mRNA levels of iNOS in the colon tissues of experimental colitis.Conclusions The probable mechanisms of EGB was that it ameliorated inflammatory injury in TNBS-induced colitis in rats by its reduction of TNF-?,NF-?Bp65 and iNOS levels.Then EGB could curb the inflammatory cascade effects of inflammatory mediators to protect ulcerative colitis.

The status of current clinical probation teaching is not satisfactory,so it is essential to establish and perfect clinical teaching mode based on laws and guide students to properly handle the relationship among the internship,employment and preparation for the examination for postgraduates,reform the clinical teaching system,strengthen the training and education of medical ethics and quality,integrate the clinical teaching resources and make full use of clinical cases,as well as strengthen the internship management so as to ensure the quality of teaching of clinical internship.

Funding of research projects within the category of Endemiology (H2401) funded by National Natural Science Foundation of China (NSFC) from 2010-2019 was summarized in this paper. Granted projects were categorized and analyzed based on the funding type, support institute and disease classification. The characteristics and trends of granted projects supported by NSFC were analyzed and summarized in order to provide reference for researchers to apply for projects in the future.

Objective: To establish a nomograph model for prediction of cervical central lymph node metastasis (CLNM) among patients with thyroid papillary carcinoma (PTC), so as to provide the evidence for designing personalized treatment plans for PTC. Methods : The data of patients that underwent thyroidectomy and were pathologically diagnosed with PTC post-surgery in the Affiliated Traditional Chinese Medicine Hospital of Xinjiang Medical University from 2018 to 2021 were collected. Patients' data captured from 2018 to 2020 and from 2021 were used as the training set and the validation set, respectively. Predictive factors were screened using a multivariable logistic regression model, and the nomograph model for prediction of CLNM risk was established. The predictive value of the model was evaluated using the receiver operating characteristic (ROC) curve and the adjusted curve. Results: Totally 1 820 PTC cases were included in the training set, including 458 cases with CLNM (25.16%), and 797 cases in the validation set, including 207 cases with CLNM (25.98%). The prediction model is p=ey/(1+ey), y=0.761 + 0.525 × sex + (-0.039) ×age + 0.351 × extrathyroid invasion + 0.368 × neck lymph node enlargement + 1.021×maximum tumor diameter + (-0.009) × TT4 + (-0.001) × anti-TPOAb. The area under the ROC curve was 0.732 for the training set and 0.731 for the validation set, and Hosmer-Lemeshow test showed a good fitting effect (P=0.936, 0.722). Conclusion The nomograph model constructed in this study has a high predictive value for CLNM among patients with PTC.

Objective To explore the association between CRP and circadian variation of blood pressure in both hypertensive and normotensive old population.Methods The 82 patients with essential hypertension (EH) and 79 normotensive adults were enrolled in this study. Serum high sensitive CRP (hsCRP) level was tested by fluorescence immunoassay technology. The 24-hour ambulatory monitor of the level and variability of blood pressure was carried out. Multivariable linear regression models were run to adjust the age, gender, body mass index, blood sugar, blood fat,smoking history and baseline blood pressure for analyzing the association between hsCRP and circadian variation of blood pressure.Results ( 1 ) The variability of systolic blood pressure during daytime,nighttime and 24-h our periods were higher in EH group than in control group (P＜0.01 or P＜0. 05), the variabilities of diastolic blood pressure were also significantly higher than in control group (P＜0. 05), the dipping ratios of nocturnal systolic, diastolic and mean artery pressure were all less than in contrast group (all P＜0.05). (2) The hsCRP was obviously higher in EH group than in control group [(5.44± 1.78)mg/L vs. (3.03±0. 72) mg/L, P＜0. 01]. (3) The hsCRP had positive associations with diastolic blood pressure variability during daytime (r= 0. 492, P＜0. 001 ), nighttime (r=0.240, P=0.048), and 24-hour (r=0.271, P=0.030). The variability in diastolic blood pressure predic ted the level of hs CRP(r=0.660, R2=0.436, P＜0.001). (4) In control group, no significant association was found between CRP and variation of blood pressure.Conclusions The BP variability and serum CRP in EH patients are obviously higher than in normotensive patients,however, the nocturnal BP dipping ratio is less than in normotensive patients. Furthermore, the level of serum hsCRP in EH patients is positively associated with the variation of blood pressure, especially for variation of diastolic blood pressure.

Objective To explore the prevalence of sialorrhea and its clinical correlation with dysphagia in Chinese patients with Parkinson′s disease ( PD ).Methods One hundred and sixteen consecutive patients with a clinical diagnosis of PD were selected.Demographic data included sex , age, years of education, age at onset of PD, clinical genotype, disease duration, treatment, Hoehn and Yahr (H&Y) stage.Sialorrhea was assessed using the Unified Parkinson′s Disease Rating Scale (UPDRS) Ⅱitem number 6.All patients were studied with videofluoroscopic study of swallowing ( VFSS).Results The prevalence rate of sialorrhea in PD was 59.5% (69/116, 95% CI 50.6%-68.4%).Males were more likely to develop sialorrhea than females (47/70 vs 22/46,χ2 =4.298, P=0.038).PD patients′sialorrhea correlated with oral dysphagia:with food leaking from the mouth ( liquid r=0.229, P=0.014; juice r=0.197, P=0.034;pudding viscosities r=0.231, P=0.013;solid food r=0.255, P=0.006), with more than 1 ml of oral food residues (liquid r=0.319, P<0.01;solid food r=0.185, P=0.047), with delay in food transfer to the root of the tongue (liquid r=0.279, P=0.002; juice r=0.209, P=0.024), and delayed swallow transfer ( pudding viscosities r=0.257, P=0.005).Sialorrhea score was not related to H&Y stage, clinical course and levodopa equivalent doses (LED).The prevalence rate of dysphagia in PD was 87.1%(95% CI 81.0% -93.2%).Liquid was more likely to cause pharyngeal dysphagia ( P=0.03).With the increase in H&Y stage , so did the oral and pharyngeal stages of dysphagia.Late and mid-course was more likely to develop oral and pharyngeal dysphagia than those with early clinical course .Conclusions Sialorrhea and dysphagia are common non-motor symptoms in PD patients.Sialorrhea is more prevalent in males and correlates with oral phase of dysphagia.Liquid is more likely to cause pharyngeal dysphagia.With increase in H&Y stage , so did oral and pharyngeal dysphagia.Even though late clinical course is more likely to develop oral and pharyngeal dysphagia than early clinical course , the comparison between late and intermediate clinical courses does not reach statistical significance .