Objective:To investigate the effects of sodium selenite on the cell apoptosis of K562 cells and to elucidate its molecular mechanisms.Methods:K562 cells were treated with various concentrations of sodium selenite at different time points,and then MTT assay was employed to evaluate the effects of sodium selenite on the proliferative inhibition of K562 cells.MTT assay was employed to evaluate the effects of sodium selenite on the proliferative inhibition of K562 cells.Electronmicroscopy,and TUNEL were performed to confirm the apoptosis of K562 cells,RT-PCR was employed to analyze the mRNA expression levels of Bcl-2 and Bax.Colorimetric method were used to measure the activities of caspase-3 of K562.Results:Sodium selenite could inhibit proliferation of K562 cells and induce them to undergo apoptosis.RT-PCR results showed that sodium selenite could decrease the mRNA expression level of Bcl-2 and increase the level of Bax of K562 cells which had been treated with sodium selenite for 48h significantly,and the activity of caspase-3 elevated remarkably too.Compared with the control group,the expression levels of Bcl-2,Bax and acivity of caspase-3 in 20?mol/L sodium selenite treatment group were markedly changed(P

Objective To optimize the extraction conditions for total flavonoids from Cibotium barometz by response surface meth-od(RSM). Methods According to the center combination of Box-Benhnken,using the RSM,the effects of ethanol concentration,the ratio of solid to liquid,the extraction time,and the extraction frequency were studied by central composite design. Results The opti-mal conditions of extraction were as follows:60％ethanol,the ratio of solid to liquid 1:40,refluxing and extracting twice,and 1.5 h for each time. Conclusion The actual extraction yield was 1.44％. The method of extraction has higher extraction efficiency than other methods and can provide a basis for the industrial production of the total flavonoids from S. barometz.

No abstract available.
Restraint, Physical*

We studied arterial oxygen desaturation, using a pulse oximeter, in 132 patients undergoing diagnostic upper gastrointestinal endoscopy to obtain predictive factors of the change. The baseline arterial oxygen saturation (SaO2) level was 98.8+/- 1.2%. During the procedure, oxygen desaturation (SaO2>95%) was found in 90.2% of the patients, Mild oxygen desaturation (95>SaO2>90%) was found in 9.8% of the patients, and there was no severe oxygen desaturation(SaO2<90%). Age(P=0.52), gender(P =0.48), smoking(P =0.71), body mass index(P =0.32), and endoscopy time(P = 0.68) was not related to the degree of oxygen desaturation. These results suggest that oxygen desaturation, which may rarely induce serious cardiopulmonary events, is not frequently observed during non-sedated diagnostic upper endoscopy.
Endoscopy ; Endoscopy, Gastrointestinal* ; Humans ; Oxygen*

Retrospective studies of duodenal polyps have shown a prevalence of 0.3-4.6% in patients referred to upper gastrointestinal endoscopy, and histologic classification have been inconsistent. A prospective consecutive study was carried out in 3,871 patients referred to diagnostic endoscopy, Sixteen patients had polyps in the first part of duodenum, for a prevalence 0.41%(0.28-0.53%, 95% confidence interval). Fourteen polyps were either inflammatory(thirteen polyps) or ectopic gastric mucosa(one polyp). Two hyperplasitc polyps were founded. All polyps were benign and sessile, and most of polyps(75%) were solitary.
Classification ; Duodenum ; Endoscopy* ; Endoscopy, Gastrointestinal ; Humans ; Polyps* ; Prevalence* ; Prospective Studies

Objective Pulmonary sequestration (PS) is a rare disease,and its clinical symptoms are usually related to subsequent pulmonary infections.We analyzed the clinical characteristics of PS complicated by aspergillosis,and reviewed related literature,so as to disclose the association between these two diseases.Methods Sixty-nine patients with surgery-confirmed PS in Peking Union Medical College Hospital between January 1990 and December 2013 were retrospectively analyzed,including seven cases complicated by aspergillosis.Clinical manifestation,imaging and surgery of these patients were analyzed.Literature focusing on PS complicated by aspergillosis in pubmed data base was reviewed.Results In these seven patients,four cases were male,and three cases were female.Age at diagnosis ranged from 29 to 58 years old.The interval from onset to definite diagnosis ranged from two weeks to 20 years.Clinical symptoms included productive cough in seven cases,hemoptysis in three cases,chest pain in two cases,and fever in one case.All cases were intralobar PS with four in the left lower lobe and three in the right lower lobe.Consolidation in chest CT was noted in six cases.Cavitation was positive in three cases.Surgery of lung lobe resection was performed in all patients.Aberrant arteries were found during operation with the origin from aortic artery in four cases,phrenic artery in two cases,and intercostal artery in one case.Aspergillosis was diagnosed by pathology in six cases and by lung tissue culture in one case.Conclusions PS complicated by aspergillosis is extremely rare,but the trend of an increase in recent years has been noted.Strict and cautious examinations for microorganisms and pathology will help find relatively insidious aspergillosis.

Objective To investigate the role of interleukin-22 (IL-22) in the pathogenesis of pityriasis rosea (PR).Methods Peripheral venous blood samples were obtained from 48 patients with PR in acute stage and recovery stage and from 20 healthy human controls.Real-time fluorescence-based quantitative PCR was performed to measure the mRNA expression of IL-22 in peripheral blood mononuclear cells (PBMCs),and enzyme-linked immunosorbent assay (ELISA) to determine the level of IL-22 in sera.Results The relative expression level of IL-22 mRNA in the patients with PR in recovery stage was significantly higher than that in the healthy controls (2.89 ±0.91 vs.1.91 ± 0.60,t =3.84,P ＜ 0.05),but lower than that in the patients in acute stage (2.89 ± 0.91 vs.4.15 ±1.36,t =3.61,P ＜ 0.05).Similarly,the level of serum IL-22 was significantly increased in the patients with PR in recovery stage compared with the healthy controls ((21.44 ± 7.33) vs.(13.22 ± 4.26) ng/L,t =4.49,P ＜ 0.05),and increased in the patients with PR in acute stage compared with those in recovery stage ((36.87 ± 10.63) vs.(21.44 ± 7.33) ng/L,t =5.01,P ＜ 0.05).The level of serum IL-22 was positively correlated with the stage of PR (r =0.883,P ＜ 0.05).Conclusions IL-22 is overexpressed in PBMCs and sera of patients with PR,implying that IL-22 is involved in the pathogenesis of PR.

Objective To design an evaluation index system of scientific research performance in military medical universities and determine the weights of these indexs.Methods Through literature study,the Balanced Scorecard Card (BSC) is used to preliminarily design the evaluation index system of scientific research performance in military medical universities.And then the Delphi Method is used to finalize the valuation indexs.The weights of valuation indexes at all levels are determined based on the Analytic Hierarchy Process (AHP).The comprehensive weight is determined by math-statistical method.Finally,we quantify the qualitative indicators of third-level indicators,collect the data on scientific research performance of two departments in recent two years and evaluate the applicability of the system.Results A systematic and comprehensive evaluation system which can reflect the scientific research performance in military medical universities,comprise 8 first-level indicators,22 secondlevel indicators and 50 third-level indicators.The weights of valuation indexes at all levels have been determined.The empirical study shows that in the comprehensive level of B department is higher than that of A.But each department has its strengths in the aspects of four dimensions.For example,compared to the score of B department,the score of A department is significantly lower in the aspect of traditional scientific input and output,comparable in the two aspects of customers and internal processes,slightly lower in 2013 but higher in 2014 in the aspect of learning and growth.Conclusions The evaluation index system of scientific research performance based on the BSC and AHP comprise long term and short-term indicators,financial and non-financial indicators,explicit and implicit indicators,qualitative and quantitative indicators.Through using the scientific consultation,analysis and calculation methods,the evaluation index system is proved to be valid and reliable.Compared to the traditional evaluation system of scientific research performance,the evaluation system based on the BSA can better and more comprehensively reflect the level of scientific research,innovation ability and sustainable development trend of a department in the aspcet of applicability.

Objective To explore the effect of surgical treatment of low back pain patients with Modic change or high intensity zone(HIZ) on MRI of the lumbar spine .Methods 32 cases with intervertebral disc herniation underwent posterior lumbar inter-body fusion and 17 cases with lumbar discogenic pain underwent radiofrequency ablation from March 2011 to July 2012 were retro-spectively reviewed .For intervertebral disc herniation patients ,all patients were divided into two groups :groupⅠ (no with Modic changes group)and groupⅡ(with Modic changes group) ,according to the Admission MRI .GroupⅡ was sub-divided intoⅡa(Mod-ic type Ⅰgroup) andⅡb(Modic type Ⅱgroup) .For lumbar discogenic pain patients ,all patients were divided into group A (without HIZ group) and group B(with HIZ group) .The VAS and ODI scales at the preoperative and follow-up were recorded and analyzed . Results The postoperative scores of VAS and ODI of all the patients were improved ,and the difference was statistically significant (P<0 .05) .For intervertebral disc herniation patients ,three groups have no statistically significant difference (P>0 .05) .For lum-bar discogenic pain patients ,the improvement rate of VAS (low backpain) of A was better than that of B ,and the difference was sta-tistically significant(P<0 .05) ,but the differences of VAS (leg pain) and ODI scores weren′t statistically significant (P>0 .05) . Conclusion Posterior lumbar interbody fusion is effective for lumbar disc herniation patients with Modic changes ,and can obtain good clinical effect .For lumbar discogenic pain patients with high intensity zone on MRI ,radiofrequency ablation can cause clinical symptoms get some relief ,but the effect is poor .

The frequency and influence on prognosis of hemorrhagic transformation (HT) after acute ischemic stroke are still uncertain with mixed results in previous studies.Slight hemorrhage transformation may will not worsen stroke patients' short-and long-term prognosis,but some MRI studies suggest that HT may impede patients to get a dramatical improvement of neurological function.We aimed to determine the overall frequency of and risk factors for HT.More importantly,we discussed the mechanism,subtypes of HT and the influence of HT subtypes on prognosis.