Silent information regulator 1 (SIRT1) is a NAD+-dependent histone deacetylase,which plays an important role in cerebral ischemia.It mainly stabilizes cerebral vascular endothelium,prevents vascular stenosis and the anti-inflammatory and anti-oxidative stress effects after cerebral ischemia.This article reviews the protective effects of STRT1 and its related mechanisms in cerebral ischemia.

Objective To investigate in evaluation of various capacity requirement of probationer nurs-ing students by nurses in operation room in order to improve clinical teaching work. Methods A self-de-signed questionnaire was applied, 191 qualified teaching nurses from nine grade three A general hospitals in Beijing were invited to fdl the questionaires. The results underwent subsequent analysis. Results The teach-ers had high expectations for various capacity of the probationer nursing students. Conclusions Clinical teachers should establish feasible teaching scheme according to the existing teaching syllabus in order to in-crease teaching quality, make students gain new insights through reviewing old materials, so that they can mas-ter various technique in operation room in short time.

BACKGROUND:Periprosthetic femoral fracture is a severe complication after total hip arthroplasty. More than 85% belongs to Vancouver B2 and B3 fractures, and the operation is difficult. OBJECTIVE:To explore the clinical effect of Cable-Ready fast system and biotype long-stem prosthesis and its effect on the recovery of joint function in patients with Vancouver B2 and B3 type periprosthetic femoral fractures after total hip arthroplasty. METHODS: A total of 60 patients receiving total hip arthroplasty suffered from Vancouver B2 and B3 type periprosthetic femoral fractures in the Huanggang Central Hospital from September 2011 to September 2012. They were equaly divided into control and observation groups according to different fixation methods. Patients in the control group were treated by ordinary steel wire cerclage fixation combined with uncemented long-stem prosthesis; those in the observation group were treated by Cable-Ready fast system combined with fast uncemented long-stem prosthesis. RESULTS AND CONCLUSION:The average operation time, the time of hospitalization and fracture healing time were shorter in the observation group than in the control group. Moreover, the intraoperative blood loss was less in the observation group than in the control group. After 1 year of folow-up, Harris hip score was higher in the observation group compared with pre-treatment (t=3.174 9,P=0.002 6), and significantly higher than the control group (t=2.479 8,P=0.015 4). The excelent and good rate of Harris hip score was significantly higher in the observation group than in the control group (χ2=11.294 5,P=0.002 6). The total incidence of complications was significantly lower in the observation group than in the control group (χ2=8.139 7,P=0.04 2). These data indicate that Cable-Ready fast system combined with uncemented long-stem prosthesis in the treatment of Vancouver B2 and B3 periprosthetic femoral fractures after total hip arthroplasty has smal injury, less postoperative complications and better recovery of hip function after operation.

Objective To know the influence of preoperative respiratory function exercise on the postoperative pulmonary function among patients with lung cancer. Methods Divided 80 patients with lung cancer into the observation group and the control group, there were 40 cases in the each group. Routine perioperative nursing cares was used in the control group, while a two weeks respiratory function exercise was used in the observation group. Compared the incidence rate of complications be-tween the two groups after the intervention, some indexes which can indicate the respiratory function were compared before and after the exercise in the observation group. Results The indexes such as PaO_2, SpO_2, MVV, TCL and FEV in the observation group after the respiratory function exercise were better than before significantly. The incidence rate of complications in the control group was more than in the observa-tion group. Conclusions Strengthen respiratory function exercise can effective improve the respiratory func-tion for patients with lung cancer when cured by thoractomy, which can promote patients' compliance, and then avoid certain postoperative complications.

The development of acupuncture in Australia has been booming.Under this circumstance,a series of acupuncture standards,codes and guidelines were established by different associations of TCM in Australia.Moreover,Australia has set the front pace in the field of acupuncture standards among the countries outside China.This paper is to introduce the acupuncture standards of Australia in three aspects respectively:national standards,industry standards and regional standards and to generalize the content of the main standards as well as analyze the current condition of Australian acupuncture standardization in order to generally give an all-around view of Australian acupuncture standards to the researchers in the field of international acupuncture standards.

Objective:To study the association of air pollution with health service demand of the elderly and middle-age patients with cardiovascular and cerebrovascular diseases,and to provide a scientific ba-sis for development of environmental protection policy and health service policy of the Chinese govern-ment.Methods:This study included survey data on self-evaluated health,outpatient service demand and inpatient service demand of the patients with hypertension,heart disease and stroke in 62 cities of 1 7 provinces from China Health and Retirement Longitudinal Study(CHARLS)in 201 1 and 201 3,and com-bined it with the data on the annual concentrations of inhalable particulate matter(PM1 0 ),sulfur dioxide (SO2 )and nitrogen dioxide(NO2 )of those provinces and cities.Conditional Logistic regression was car-ried out to assess the possible effects of air pollutants on self-evaluated health and health service utiliza-tion.Results:The results showed that turning points existed in the effects of concentrations of NO2 and SO2 on the health service demand of the patients with hypertension,heart disease and stroke.The inpa-tient service demand of the hypertension patients increased with NO2 concentration when it was lower than 35.1 μg/m3 and decreased with NO2 concentration for higher value.Self-evaluated health of the patients with heart disease and stroke decreased with SO2 concentration when it was lower than 63.8 μg/m3 and increased with SO2 concentration for higher value.In addition,no evidence was found for the association between PM1 0 and health service demand.Conclusion:Air pollution may have effects on health service demand of the patients with hypertension,cardiovascular and cerebrovascular diseases,and different air pollutants at high or low concentration may have different health effects.

Hepatocellular carcinoma (HCC) is one of the leading causes of cancer-related death worldwide and has high mortality and recurrence rates and low survival rates. Circular RNAs (circRNAs) are a class of single-stranded closed circular RNA molecules with tissue- and development-specific expression and play a regulatory role in organisms. These circRNAs regulate the progression of HCC by acting as miRNA sponges and targeted protein-coding genes, but the basic mechanism is still unclear. This article summarizes the formation mechanism and biological functions of circRNAs, reviews the research advances in the role of circRNAs in the pathogenesis of HCC, and points out their potential value as diagnostic markers and therapeutic targets for HCC.

Objective:To investigate the MRI features of the primary sinonasal malignant melanoma (SMM) and evaluate the signal pattern based on T 1WI and T 2WI, in order to improve the diagnostic accuracy of SMM. Methods:The MRI findings of 63 SMM cases confirmed by pathology from April 2007 to November 2018 at Beijing Tongren Hospital, Capital Medical University were analyzed retrospectively. The signal intensity of malignant melanoma was classified into four types(Ⅰ—Ⅳ) according to the proportion of signal areas of the largest slice of the tumor on T 1WI and T 2WI. The classification criteria according to T 1WI: type Ⅰ, the area of hyperintensity was ≥50%; type Ⅱ, the area of hyperintensity was <50%; type Ⅲ, the tumor did not show hyperintensity, and the area of isointensity was ≥50%; type Ⅳ, the tumor did not have high signal area, and the area of low signal was ≥50%. The classification criteria according to T 2WI: type Ⅰ, the area of low signal in the tumor was ≥50%; type Ⅱ, the area of low signal was <50%; type Ⅲ, the tumor did not contain low signal area, and the area of isointensity was ≥50%; type Ⅳ, the tumor did not have low signal area, and the area of high signal intensity was ≥50%. The proportion of each type was calculated. Results:According to T 1WI, typeⅠwas identified in 27 cases (42.9%, 27/63), typeⅡ in 25 cases (39.7%, 25/63), type Ⅲ in 4 cases (6.3%, 4/63), and type Ⅳ in 7 cases (11.1%, 7/63). According to T 2WI, type Ⅰwas demonstrated in 29 cases (46.0%, 29/63), type Ⅱ in 28 cases (44.4%, 28/63), type Ⅲ in 2 cases (3.3%, 2/63), and type Ⅳ in 4 cases (6.3%, 4/63). There were 16 cases classified as type I based on T 1WI and T 2WI. Conclusions:Typical and atypical SMM can be identified according to signal patterns. The typeⅠsignal pattern of SMM cases on T 1WI and T 2WI is typical and can be easily diagnosed, but the proportion was less than 50%. For atypical SMM, malignant melanoma should be strongly suspected if hyperintense on T 1WI or hypointense on T 2WI is found.

AIM: To investigate the expression of connective tissue growth factor (CTGF) and α-SMA in human lens epithelium cell (HLEC) line B3 after transfection by liposome-coated siRNA targeting CTGF.METHODS: HLECs were transfected with small interfering RNA (siRNA) targeting CTGF,labeled with 5`-fluorescein isothiocyanate (5`-FITC) and coated with lipofectamine.The transfection ratio was evaluated via fluorescence intensity.Cell counting kit-8 (CCK-8) assay was performed to assess cytoviability of both non-transfected and transfected HLECs.Quantitative RT-PCR,cell immunochemistry and Western blot analysis were conducted to detect the expression changes of CTGF and α-SMA after transfection.RESULTS: A highly effective transfection ratio was observed in siRNA co-transfected with lipofectamine.The transfection ratio reached 95% at 24h.The proliferation of HLECs was inhibited by siRNA after 72h transfection.The expression of CTGF and α-SMA significantly decreased in HLECs after transfected by CTGF siRNA for 24h.This effect was not found in negative control siRNA.CONCLUSIONS: SiRNA targeting CTGF decreased CTGF and α-SMA expression in HLECs,which is a potential therapeutic strategy for posterior capsular opacification.

Objective: To screen the Hub genes associated with the occurrence and development of esophageal squamous cell carcinoma (ESCC) and to analyze their biological functions by using various bioinformatics analysis tools. Methods: ESCC chip profile GSE100942 from GEO database was used as study subject; GEO2R tool was used to analyze the data and to screen the differentially expressed genes (DEGs), and the bioinformatics tools (DAVID, String, Cytoscape) were further used to construct protein-protein interaction (PPI) network and identify the key Hub genes. GO and KEGG were used for the biological function enrichment analysis. In the meanwhile, MiRDB was applied to identify the miRNAs that might regulate Hub genes and to construct Hub gene–miRNA network. Importantly, the expression of DEGs and the patient survival were verified by the GEPIA analysis tool. Results: By analyzing GSE100942 database, a total of 1229 DEGs with difference of 2 times and 223 DEGs with difference of 4 times were screened out. In addition, 20 Hub genes, which were all up-regulated in ESCC tissues, were also identified. The functional enrichment analysis showed that these DEGs were mainly enriched in cancer related pathways and involved in cell division and mitotic nuclear division. Among those 20 Hub genes, DLGAP5, BUB1B, TPX2, TTK, CDC20, CCNB2, AURKA and DEPDC1 were identified as 8 key Hub genes that related with ESCC, and involved in many important biological processes, such as cell proliferation, cell cycle and signal pathway. Five Hub genes, CEP55, ECT2, NEK2, DEPDC1 and NUSAP1, were identified to be highly regulated by the miRNA regulatory network. Conclusion: Microarray combined with bioinformatics can effectively analyze the DEGs associated with the occurrence and development of ESCC. The identification of the 20 Hub genes and the 8 key Hub genes can provide theoretical guidance for further research on the molecular mechanism and molecular marker screening of ESCC. ·