Objective:To investigate the current situation of network ethics among the college students , to pro-vide evidence for cultivating correct network ethics .Methods:A survey was conducted in 1200 students with a self-designed questionnaire .Results:College students in the network ethics exist conflicts .They eager to trust but face a crisis of confidence , tool enhancements but responsibility fall , network security but network open , virtual but reality.Conclusion:The government should strengthen the network legislation and network credit system , should increase the development of network security technology so as to build networks ethical norms .Colleges should pay attention to culture the social responsibility , and promote the quality level of network ethics among the college students .

Objective:To study the mental health of old people who live in endowment institutions in Shandong Province and its influencing factors. Methods: A sample of 2200 old people over 60 years old was selected with the stratified random sampling method. They were investigated using the self-designed questionnaires, symptom checklist (SCL-90), and Social Support Rating Scale. A total of 2013 questionnaires were recovered effectively (91. 5%), and 271 questionnaires were analyzed in this study. Results:41. 7% of old people in endowment insti-tutions in Shandong Province is positive in SCL -90 . Multivariate analysis showed that self -care ability ( P =0 . 045 ) and type of chronic disease ( P=0 . 025 ) associated with mental health problems of old people in Shandong Province. Conclusion:The mental health status of old people in endowment institutions in Shandong Province was not optimistic and its influencing factors included self-care ability and the type of chronic disease. It should take measures to promote successful aging in Shandong Province.

Objective To determine the feasibility and accuracy of velocity propagation within main pulmonary artery(VP)from color M-mode Doppler imaging using custom software on a personal computer for noninvasive estimation of PVR.Methods Color M-mode imaging of pulmonary flow was obtained and then transferred to computer,the velocity propagation of pulmonary flow was automatically obtained.Comparative studies among Doppler echocardiography,personal computer and cardiac catheterization for predicting PVR had been done in 20 children with congenital heart disease and 20 normal children.Results Velocity propagations of children with congenital heart disease were significant lower than those of normal children obtained by color Mmode echocardiography[(38.38±18.89)cm/s VS(80.34±15.65)cms,P＜0.01),and correlated well with invasive PVR measurements(r=-0.69,P＜0.01).The correlation and repeatability of VP obtained by the custom software were better than VP obtained by Doppler echocardiography(r=-0.78,P＜0.01).A VP cutoff value obtained by the custom software of 35.910 had a sensitivity of 92.9% and a specificity of 100% to within pulmonary artery obtained by color M-mode echocardiography using custom software on a personal computer.

Objective To explore the function of infliximab in inducing remission in Crohn's disease and the effect of the inducing remission were followed up. Methods Ten patients with Crohn's disease received a infliximab, 5-aminosalicylic acid (5-ASA) and Azathioprine (AZA) therapy for inducing and maintenance remission. Crohn' s disease activity index (CDAI), C-reactive protein (CRP), erythrocyte sedimentation rate (ESR), alanine aminotransferase (ALT), apartate aminotransferase, (AST), total bilirubin (TBil), conjugated bilirubin, (CB), creatinine (Scr) were evaluated at week 0, 10, 22 and 50. Simple endoscopic score for Crohn's disease (SES-CD) were evaluated at week 0, 10 and 50. Adverse reactions were also evaluated. Results At week 10, all patients achieved remission. The indicators of CDAI, CRP, ESR and SES-CD were significantly declined than those at week 0 (P＜0.01). The follow-up was terminated in one patient due to the relapse at week 30. At week 50, the indicators of CDAI, CRP, ESR and SES-CD in six patients a little bit increased compared with those at week 10, but no statistic significant (P=0. 2001、0. 0600、0. 1328、0. 4230 respectively), but significantly declined compared with those at week 0 (P =0.0005、0.0087、0.0054、0. 0163 respectively). No severe adverse reaction was observed in all patients.Conclusions Infliximab showed an exact efficacy in inducing remission in Crohn's disease. And 5-ASA and AZA were effective for maintenance remission in part of the patients after infliximab induced remission.

Objective To observe the effects of histone deacetylases inhibitor (HDACi) on cognitive performance and cerebral tau phosphorylation in transgenic mice coexpressed five familial Alzheimer' s disease mutations (5XFAD).Method The total 12 5XFAD-CC and 12 wild type (WT) mice were administrated with suberoylanilide hydroxamic acid ( SAHA,n =7) and vehicle ( n =5 ),respectively.The cognitive performance was assessed by Y-maze and Morris water maze.The protein levels of acetylated α-tubulin,total tau and phosphorylated tau and phosphorylated glycogen synthase kinase-3β (GSK3β) were determined by Western blotting.Results SAHA ameliorated learning and memory deficits in 5XFAD-CC mice (39.10％ ±2.25％,t =2.688,P =0.0312 for total numbers of entrance in novel arm; 26.81％ ±0.78％,t =3.271,P =0.017 for time spending in novel arm; F =5.936,P =0.045 for hidden platform;31.70％ ±4.21％,t =2.317,P =0.049 for probe trial).Administration of SAHA significantly increased acetylated α-tubulin in hippocampus of WT and 5XFAD-CC mice (26.42％ and 29.64％,respectively).Additionally,SAHA attenuated tau-pSer396,tau-pSer404 and tau-pThrThr231 in hippocampus of 5XFAD-CC mice (24.22％,48.98％ and 26.95％,respectively). Moreover,hippocampal phosphorylated GSK3β was markedly reduced in SAHA-treated 5XFAD-CC mice (31.29％). Conclusion SAHA may improve cognitive performance in 5XFAD-CC mice, which is associated with its significant effects on the phosphorylation of tau and GSK3β.

Assessment mode is a bottleneck in medical education reform nowadays.Although traditional assessment tools,such as written examination,are still widely used in medical education assessments,they have obvious limitations.With the enhancement of requirements in physicians' abilities,assessments on some basic abilities of physicians are still insufficient.The United States and Europe not only focus on the curriculum reform but also the development of appropriate assessment tools,therefore,some new assessment tools are invented.These assessment tools are applicable to the formative assessment and are student-centered,being able to promote the development of education and provide new options for medical education assessments.

Objective To explore whether ginsenoside Rg1 can attenuate ?-amyloid peptide 25-35-induced Tau hyperphosporylation in rat embryo cortical neurons by regulating the activity of GSK-3? and PP2A. Methods Primary cultures of cortical neurons were prepared from the embryonic day 18?2 in Sprague-Dawley rats. The experimental groups were designed as follows:1.Neurons culture (control group); 2. Neurons exposed to 20?mol/L A?_ 25-35 for 12 hours (A?-model group); 3.Neurons exposed to 20?mol/L A?_ 25-35 and 10 mmol/L lithium chloride (LiCl), a specific inhibitor of glycogen synthase kinase-3?(GSK-3?), for 12 hours (LiCl group); 4.Neurons exposed to 20?mol/L A?_ 25-35 for 12 hours in the presence of 24-hour pretreatment with ginsenoside Rg1 (Rg1 pretreatment group) . Western blotting and immunocytochemical staining were used to detect the levels of Tau phosphorylation,total Tau and GSK-3? in cortical neurons. Non-radioimmunoassay was introduced to detect the activity of protein phosphatase 2A (PP2A). Results In A?-model group, the levels of Tau protein phosphorylation in the sites of Ser 396 ,Ser 199/202 ,Thr 231 and total Tau were enhanced. Meanwhile, the expression of GSK-3? was also increased, but the activity of PP2A was unchanged. In LiCl group and Rg1 pretreatment group , the hyperposphorylations of Tau protein and total Tau and the expression of GSK-3? were markedly reduced compared to those of the A?-model group (P

DNA copy number variation is an important pathogenic factor of human diseases and might be involved in the pathogenesis and pathological process of inflammatory bowel disease (IBD).Aims: To investigate the copy number variation of CNTNAP3 gene and its significance in Crohn''s disease (CD).Methods: A total of 101 active CD patients admitted from Jul.2009 to Dec.2010 at Renji Hospital, School of Medicine, Shanghai Jiao Tong University were enrolled.Eighty healthy subjects were served as controls.Peripheral blood or intestinal mucosa samples of CD patients were collected, and the copy number variation of CNTNAP3 gene was screened and validated by array-based comparative genomic hybridization (aCGH, n=8) and real-time PCR (n=93);expression of CNTNAP3 encoding protein was determined by ELISA (n=55).Results: A large fragment copy number amplification was revealed by aCGH at chromosome 9p13 region (including CNTNAP3 gene) in untreated CD patients.Real-time PCR confirmed that the copy number of CNTNAP3 gene was amplified in peripheral blood of CD patients, especially steroid-naive patients as compared with the normal controls (208 616.4±126 984.7 and 233 453.3±113 520.8 vs.161 750.2 ±53 940.3, P<0.05 and P<0.01).In the clinical parameters analyzed in this study, only smoking was significantly correlated with CNTNAP3 copy number amplification (P<0.05).However, there was no significant difference in plasma CNTNAP3 level between CD patients with amplified copy number and normal controls (P>0.05).Furthermore, the plasma CNTNAP3 level in CD patients with amplified copy number was not correlated with the simplified endoscopic score for CD (P>0.05).Conclusions: Copy number amplification of CNTNAP3 gene might be involved in the pathogenesis of CD in Chinese population.Glucocorticoid treatment and smoking might affect the copy number variation of CNTNAP3 gene.Plasma CNTNAP3 level cannot discriminate CD patients from healthy subjects.Conclusions of this study needs to be further demonstrated and discussed.

Objective:To evaluate the effect of intravenous infusion of lidocaine on the efficacy of conventional treatment for rheumatoid arthritis.Methods:Forty-four patients with rheumatoid arthritis of either sex, aged 32-85 yr, weighing 40-76 kg, who were admitted to the Department of Pain and Nephrology in our hospital from September 2019 to September 2020, were divided into 2 groups ( n=22 each) according to the random number table method: control group (C group) and lidocaine group (L group). Both groups received conventional treatment.When visual analogue scale (VAS) score ≥5, glucocorticoid (GC) and non-steroidal anti-inflammatory drugs (NSAIDs) were taken orally to maintain the VAS score ≤4.In group L, 0.2% lidocaine hydrochloride injection 3 mg/kg (diluted with 0.9% sodium chloride injection 500 ml) was intravenously infused at a rate of 25 ml/h for 2 h, once a day, for 5 consecutive days, based on the conventional treatment.The VAS score, 28-joint Disease Activity Score (DAS28 score), simplified disease activity index score (SDAI score), consumption of GC and NSAIDs and adverse reactions were recorded before treatment (T 1) and at 1, 4 and 8 weeks after treatment (T 2-4). The temperature of the pain area of the affected joint was evaluated through infrared thermal imaging at T 1 and T 2. Results:Compared with the baseline at T 1, VAS score, DAS28 score and SDAI score were significantly decreased at each time point, and the temperature of the pain area of the affected joint at T 2 was decreased in the two groups ( P<0.05). There were no significant differences in VAS score, DAS28 score and SDAI score at each time point between two groups ( P>0.05). Compared with group C, the consumption of GC and NSAIDs was significantly decreased, and the temperature of the pain area of the dorsum of both hands and the dorsum of right foot at T 2 and incidence of adverse reactions were decreased in group L ( P<0.05). Conclusions:Intravenous infusion of lidocaine can optimize the efficacy of conventional treatment for rheumatoid arthritis.

Surgical resection in patients with advanced primary carcinoma of liver has high risks of early recurrence and incidence of portal vein tumor thrombus, caused by insufficient resi-dual liver volume after two-steps hepatotomy. At present, the treatment for patients with advanced primary carcinoma of liver is limited, thus can't satisfy the requirement of patient for treatment. The authors introduce the clinical experience of a patient with hepatocellular carcinoma and insufficient residual liver volume who underwent preventive immunotherapy plus target therapy after associa-ting liver partition and portal vein ligation for staged hepatectomy, in order to provide reference for relevant treatment.