Objective To investigate the inhibition mechanism of sodium selenite on HCT116 cells.Methods In the present study,we explored the cytotoxicity induced by sodium selenite and the underlying mechanism by MTS assay,WesternBlot,and small RNA interference technique.Results It was found that the sodium selenite at 5uM concentration could indeed reduce the viability of colon cancer cell line HCT116 by a large margin through increasing the generation of reactive oxygen species (ROS),and that the increased levels of ROS could activate c-Jun Nh2-terninal kinase 1 (JNK1).Additionally,knockdown expression of JNK1 or p53 by using RNAi attenuated the cytotoxicity induced by sodium selenite,indicating that both of JNK1 and p53 are required in the process of cell death induced by sodium selenite.Conclusion The sodium selenite could induces cell death in HCT116 through oxidative stress by involvement of JNK1 and p53,both of which play a critical role in toxicity of sodium selenite.

Objective To compare the safety and therapeutic effect between laparoscope and open neoplasty of gastroduodenal ulcer perforated.Methods Among 93 patients with gastroduodenal ulcer perforated,54 patients were given laparoscope neoplasty of gastroduodenal ulcer perforated (laparoscope group),39 patients were given open neoplasty of gastroduodenal ulcer perforated (open group).The informations during the period of operation in the 2 groups were compared.Results There was no death in the 2 groups,2 cases in laparoscope group converted to open operation.The operation time of laparoscope group was significantly longer than that of open group [(74.85 ± 15.80) min vs.(62.97 ± 12.14) min],there was statistical difference (P ＜ 0.01).There were no statistical differences in the time of postoperative indwelling gastric tube,hospitalization time and complication rate between the 2 groups (P ＞ 0.05).The rate of postoperative analgesia of laparoscope group was significantly lower than that of open group [20.4％ (11/54) vs.74.4％ (29/39)],there was statistical difference (P ＜ 0.01).Conclusion Laparoscope neoplasty of gastroduodenal ulcer perforated is effective and safe,and has high application value.

Objective To report the clinical and magnetic resonance imaging(MRI)features of 5 eases with idiopathic orbital myositis.Methods Four females and one male,aged 27 to 57 years,presented department of neurology in the First Hospital of Peking University in October 2008 to September 2009.The duration of disease Was between 3 months and 4 years.Recurrent course appeared in 3 of them.0rbital MRI Was performed in all of them.After diagnosis they underwent long.term corticosteroid treatment.Results All patients presented ocular pain,asymmetrical and incomplete ophthalmoplegia and mild proptosis.EMG revealed no significant decline in repetitive stimulation.Muscle biopsies of limb muscle were unremarkable.Creatine kinase and thyroid function test were in normal limits.MRI revealed unilateral.focal or difluse enlargement and enhancement of extraocular muscles,involving 1 extraocular muscle in 2 cases,2extraocular muscles in 2 cases,more extraocular muscles in 1 case.No evidence indicated bone destruction or cavernous sinus abnormalities.Five Cases showed improvement and remission after long-term administration of steroids.Conclusion Persistent and asymmetrical ophthalmoplegia is connnon in orbital myositis.Extraocular muscle swelling characterized the MRI changes.

Objective To report the clinical and pathological features of chronic graft-versus-host disease-related polymyositis by summarizing the clinical data of the patient with chronic graft-versus-host disease-related polymyositis. Methods One patient with chronic graft-versus-host disease-related polymyositis was hospitalized in our hospital on December 29,2010.The patient,40 years old,female,underwent allogeneic haematopoietic stem cell transplantation because of acute granulocytic-monocytic leukemia.Fourteen months later she manifested as slowly progressive muscle weakness and myalgia in all limbs.Serum creatine kinase level was between 426-1948 U/L. Myositis antibody EJ was strongly positive.Electromyogram showed a neurogenic impairment and slow peripheral nerve conduction speed.Muscle biopsies were carried out in the left biceps brechii.In addition of standard histological and enzyme histochemical staining for the muscle sections,immunohistochemical workup was performed with mouse antiCDs,anti-CD20,anti-CD68 and anti major histocompatibility complex- Ⅰ ( MHC- Ⅰ ) monoclonal antibodies as first antibodies.Results The muscle biopsy showed large variation of fiber size,with muscle fiber necrosis,regeneration.Some angular fibers distributed in small cluster.The inflammatory cells infiltrated around the small vessel or in the endomysium,mainly CD8+ T-lymphocytes and CD6+8 macrophages.The most muscle fibers were MHC-Ⅰ positive. Conclusion The graft-versus-host disease-related polymyositis manifests as chronic myositis process with neurogenic lesions.

Objective To investigate the manifestation strategies of emotional labor and current status of emotional intelligence,further to discuss their correlation. Methods Investigation was carried out in 341 nurses by emotional labor scale(El.S) and emotional intelligence scale(EIS) and the results underwent analysis. Results In the aspect of emotional labor,nurses preferred natural manifestation instead of surface manifestation strategy.Nurses had strong ability of understanding and emotional control (P＜0.01) but weak perceptual emotional ability(P＜0.01).Emotional intelligence had higher predictive power for natural and inner presentation(P＜0.01),but was no related with surface manifestation(P＞0.05). Conclusions Different correlation existed between various manifestation strategies of emotional labor and emotional intelligence.Improvement of emotional intelligence can facilitate the application of natural manifestation and inner presentation.

Objective To evaluate ocular surface changes following minimal vitreoretinal surgery in postmenopausal women patients with proliferative diabetic retinopathy (PDR).Methods Sixty-one women PDR patients (61 eyes) underwent vitreous microsurgery were recruited in this prospective study,including 31 postmenopausal women (PMW group) and 30 non-postmenopausal women (non-PMW group).The contralateral eyes were considered as the control group.Corneal fluorescein (FL) staining,tear break-up time (TBUT),Schirmer I test (SIT),central corneal sensitivity and ocular surface disease index (OSDI) were estimated.All tests were carried out 1 day preoperatively and 1 day,10 days,1 month and 3 months postoperatively.The student's t test or Mann-Whitney U and ANOVA for repeat measurements test were used.Results Preoperatively,TBUT of surgery and non-surgery eyes in PMW were shorter than non-PMW (t=-2.115,-2.035;P＜0.05),but higher OSDI scores were found in PMW (t=2.482,2.208;P＜ 0.05).TBUT reduction rate (Z=-2.771,-1.993;P＜0.05) and OSDI rising rate (Z=2.539,2.157;P＜0.05) of surgery eyes in PMW were higher than non-PMW 1 day and 10 days postoperatively.The lower SIT of surgery eyes in PMW were observed at 1 day and 10 days (t=-2.403,-2.029;P＜0.05) after surgery.At 10 days after surgery,FL and OSDI scores of surgery eyes in non-PMW returned to preoperative level (Z=-0.447,-0.513;P＞0.05),but in PMW,the recovery process experienced 1 month (Z=-1.500,-0.853;P＞0.05).TBUT and SIT of surgery eyes in two groups both reached preoperative level at 1 month following surgery (Z=-0.715,-1.266,-1.531,-0.522;P＞ 0.05).Conclnsions PMW with PDR had ocular surface dysfunction,which resulted in aggravated dry eye after minimal vitreoretinal surgery.

Objective To explore the effects of application of virtual simulation technology in basic nursing practice teaching.Methods Convenience sampling method was used to select 204 nursing students of grade 2013 in Fenyang College of Shanxi Medical University as the research subjects.Virtual reality software and simulator were used to build realistic experiment environment.Tasks of virtual simulation training were primary,intermediate and advanced.Questionnaire survey was conducted after training to investigate teaching effects,and theoretical and operating test scores of grade 2013 were compared with those of grade 2012.Results In the primary,intermediate and advanced tasks,there were 87.3％,77％ and 60.8％ of the students having scores of 91～100;theoretical and operating test scores of grade 2013 were better than those of grade 2012(P＜0.01);98％ of the students considered virtual simulation enhanced proficiency of operation,93.1％ of the students considered virtual simulation facilitated learning,91.1％ of the students liked virtual simulation learning,and 90.1％ of the students considered virtual simulation stimulated interests in learning.Conclusion The application of virtual simulation experiment teaching in basic nursing practice teaching can promote the innovation of teaching mode and improve the teaching quality and teaching effect.

Objective To explore the preventive effect of Bailing capsules(BL) on myocardial fibrosis in the viral myocarditis(VMC) mice models and to clarify the possible mechanism.Methods The models of VMC were established by injecting Coxsackie virus B3 (CVB3) solution into 50 BALA/C mice.The 31 mice were divided into model group(n =11),large dose BL group(n =10)and small dose BL group (n =10).At the same time the control group (n =10) was established.The mice in model group and control group were fed with water 1 mL/d,the mice in large dose BL group were fed with BL at a dose of 7.5 g/(kg · d),and the mice in small dose BL group were fed with BL at a dose of 2.5 g/(kg · d).After 60 d,the levels of angiotensin Ⅱ (Ang Ⅱ) in blood serum of mice in various groups were detected by using ELISA.Myocardium tissue of mice was stained by Masson and collagen volume fraction(CVF)was accounted.At the same time,the content of periostin mRNA and transforming growth factor β1 (TGF-[β1) mRNA in myocardium tissue of mice were detected by adopting reverse transcription(RT)-PCR.Results Compared with the control group,the levels of serum Ang Ⅱ,CVF,TGF-β1 mRNA and periostin mRNA were increased (all P ＜ 0.01) in the model group.Compared with the model group,the levels of serum Ang Ⅱ,CVF and TGF-β1 mRNA were obviously decreased in large dose BL group and small dose BL group (all P ＜ 0.05).Compared with the model group,the level of periostin mRNA was obviously decreased in large dose BL group (P ＜ 0.05),but the level of periostin mRNA in small dose BL group was not decreased obviously (P ＞ 0.05).Conclusions BL can offer some protection to myocardial fibrosis in VMC mice.The possible mechanism may be performed through inhibiting the expression of serum Ang Ⅱ and TGF-β1 in myocardium tissue to reduce the expression of periostin.

Objective To report 2 cases of Fabry disease with early-onset ischemic stroke and investigate the clinical and image features. Methods The 2 patients developed dizziness, diplopia and progressive memory decline at 32 and 25 years of age respectively. The α-galactosidase A (GLA)activity was 4. 3 U in case 1 and 1. 0 U in case 2 ( normal range 100-500 U). Skin biopsy showed numerous membrane bounded osmiophilic laminar material in vascular smooth muscle cells and endothelial cells. GLA gene analysis revealed GLA exon 7 1033-1034 TC del in case 1 and GLA exon 3 466G ＞ A in case 2. The 2 patients were evaluated by Mainz severity score index (MSSI) and cranial MRI. Results The general MSSI was 32 in case 1 and 16 in case 2, with the highest score of neurological score ( 11 and 14). Both cases showed multifocal infarcts in bilateral cerebellum, occipital lobe, basal ganglia, which were hypointensity on T1 WI and hyperintensity on T2WI. There were hyperintensity changes in the pulvinar and basal ganglia on T1 WI in case 2. Conclusions Cerebral ischemic stroke could appear as initial symptoms in Fabry disease,which predominantly involved the posterior circulation. There might be no dilation of basal-vertebral artery.

Objective Our study was performed to design a drug-sustained capsular tension ring (CTR) to evaluate its potentiality on prevention of PCO in the swine capsular bag model in vitro.Methods Following the continuous capsule curvilinear capsulorhexis ( CCCC),Phacomulsification with capsular tension ring implantation was pedormed.CTR-supported swine capsular bag models were prepared and divided into two groups,group CTR ( n =13 ) implanted with the original CTR without any modification and group CTR-PLGA-MG132 ( n =13) implanted with the CTR covered with PLGA and MG132.The CTRsupported capsular bags were cultured in vitro for up to 3 weeks.The area of lens epithelial cells (LEC) coverage over the posterior capsule surface was quantified every day under microscope.The capsules were treated for histological examination.The change of fibronectin was assessed by ELISA assay kit.Results After 2 ～ 3 days,outgrowth of LEC across the posterior capsule was observed,and the posterior capsule was totally covered by a confluent monolayer of cell after (9.06 ± 1.61 ) days in group CTR.Capsular wrinkles became increasingly apparent as time progressed.An increase in capsular thickness was also observed.In contrast,there was less LEC deposition in group CTR-PLGA-MG132.Histological examination showed LEC layers were closely arranged on the posterior capsular surface in group CTR.In group CTR-PLGA-MG132,there was comparatively looser cell arrangement.Compared with group CTR,the mean fibronectin level of posterior capsule by week 3 in group CTR-PLGA-MG132 was 25.14 μg/ml and 106.09 μg/ml respectively.Statistical analysis showed a significant difference ( P ＜ 0.01 ).Conclusions LEC migration,proliferation,and synthesis of EMT markers were inhibited in Group CTR-PLGA-MG132,compared with Group CTR.Drug-sustained capsular tension rings can effectively inhibit the migration,proliferation of LEC and the change of EMT ( epithelial-to-mesenchymal transition) in swine capsular bag models.Drug-sustained capsular tension rings might be a potential therapy to prevent the posterior capsular opacification in the future.