Ischemic stroke is closely associated with carotid atherosclerosis.Detecting carotid plaque components (including fibrous Cap,lipid core,hemorrhage,and calcification) using high-resolution 3.0T magnetic resonance imaging contributes to evaluate the risk of ischemic stroke and guide treatment.This article reviews the research status of magnetic resonance imaging of carotid atherosclerotic plaque components.

Objective:To explore the discrimination against the patients with mental disorders and current situation of awareness of mental health knowledge of medical postgraduates and their relationship.Methods:A questionnaire survey was conducted among 132 medical postgraduates in October 2016 using the assessment scale of discrimination against patients with mental disorders and mental health knowledge awareness questionnaire,which derived from mental health work indicators survey and evaluation program issued by the General Office of the Ministry of Health in 2010.Results:There was significant gender difference (P ＜0.01)in the overall score and the score of each dimension of assessment scale of discrimination against patients with mental disorders,and the score of mental health knowledge was (13.93-± 3.13).There was significant negative correlation between scores of assessment scale of discrimination against patients with mental disorders and mental health knowledge.Multiple linear regression analysis showed that awareness of mental health knowledge could predict the discrimination against the patients with mental disorders and all its factors.Conclusion:Awareness of mental health knowledge in medical post graduates can predict the discrimination against the patients with mental disorders.Medical universities should carry out corresponding education and publicity work with pertinence.

Metabolomics, the newest “omics”science after genomics, thranscriptomics and proteomics, is the study of simultaneous identification and quantification of products of the biochemical reaction within an or-ganism. It has been used in the study of papillary thyroid cancer. This review presents an introduction to the con-cept and research techniques of metabolomics and the progress of application in papillary thyroid cancer.

OBJECTIVEThis study aims to investigate the color stability of ceromer with different thicknesses and different types of resin adhesive materials after accelerated aging and provide references for clinical application and selections.

METHODSNine groups of experimental samples were used, and each group contained five samples. We made joint samples with ceromer having three different thicknesses (1.00, 0.75, 0.50 mm) combined with three different resin adhesive materials (RelyX Veneer, RelyX Unicem, Filtek Z350 Flow), respectively. All samples were placed into Xenon Lamp Aging Instrument to implement accelerated aging. Spectrophotometer was used to measure the lightness (L*), red green color value (a*), and blue yellow color value (b*) of all samples before and after accelerated aging. The change of lightness (ΔL), red green color value (Δa), blue yellow color value (Δb), and color variation (ΔE) were also calculated. We investigated the influence of ceromer veneer thicknesses and resin adhesive material types on color variation by two-factor analysis of variance.

RESULTSThe thickness and type factors showed significant influence on ΔE values, and exhibited interactions (P < 0.05). The ΔE values of all experimental groups were lower than 3.3. After the accelerated aging process, all L*, a*, and b* values of the experimental groups decreased and the ΔL values were lower than 2.0.

CONCLUSIONCeromer veneer thickness and resin adhesive material types could affect the color stability of ceromer veneer and resin adhesive materials. The changes in lightness and color in ceromer veneer and resin adhesive materials are considered clinically acceptable after accelerated aging.

Objective To investigate the impact on fertility potential of patients with stage Ⅰ endometriosis treated by gonadotropin-releasing hormone agonist (GnRH-a) treatment followed by laparoscopy surgery.Methods From Jan.2006 to Jun.2008, medical documents of 102 patients with minimal or mild endometriosis (stage Ⅰ) treated by laparoscopy and hysteroscopy surgery and excluded the other causes of infertility were reviewed retrospectively in Peking University People's Hospital.The pelvic endometriosis teisions were destructed by electric burning.Those patients were divided into GnRH-a treatment group(n = 60) and non-GnRH-a treatment group(n = 42) after surgery.The patients in GnRH-a treatment group were administered by GnRH-a injection once or twice after surgery, in the mean time, no adjuvant therapy were given for the patients in the other group.All the patients were followed-up for 24 months after surgery to evaluate the effect of postoperative GnRH-a treatment on pregnancy outcome and fertility potential(number of pregnancy per 100 women in one month, expressed as percentage).Results The total pregnancy rate of 78% (47/60) in GnRH-a treatment group is significantly higher than 55% (23/42) in non-GnRH-a treatment group(P =0.012).There is no significant difference in spontaneous abortion rate between the GnRH-a treatment group and non GnRH-a treatment group(19% vs.13%, P = 0.465).The fecundity rate of were 6.17% in GnRH-a treatment group and 3.26% in non-GnRH-a treatment group, which the relative risk is 1.9 (95% CI: 1.1-3.0).Conclusion Low-dose GnRH-a treatment after laparuscopy can improve the pregnancy rate and fertility potential of patients with stage Ⅰ endometriosis.

BACKGROUND:Pulmonary aspergilosis is a disease caused by pulmonary fungal infection. Its diagnosis and treatment is usualy delayed because of nonspecific clinical symptoms, physicial sign and imaging changes as wel as uncertainties of histological and bacterial findings. Therefore, it is necessary to establish mouse models of invasive pulmonary aspergilosis to investigate the underlying pathological mechanism and novel therapeutic methods. OBJECTIVE: To establish mouse models of invasive pulmonary aspergilosis, detect the expression ofγ-interferon, Tol-like receptor 2 and Tol-like receptor 4, and discuss the mechanism of action underlying invasive pulmonary aspergilosis. METHODS:Seventy-five female BALB/c mice of clean grade, aged 6-8 weeks, were randomly and evenly divided into five groups: blank control group (group A), immunosuppressive model group treated with high concentrations of Aspergilus fumigatus spore suspension (group B), normal infection group treated with high concentration of Aspergilus fumigatus spore suspension (group C), immunosuppressive model group treated with low concentration of Aspergilus fumigatus spore suspension (group D), normal infection group treated with low concentration of Aspergilus fumigatus spore suspension (group E). First, mice in the groups B and D were intraperitonealy injected with cyclophosphamide to establish immunosuppressive models. The mice in the groups D, E (108 cfu/mL) and groups B, C (109 cfu/mL) were treated with 12 mL Aspergilus fumigatus spore suspension through the use of nebulizer. Mice in the group A were treated identicaly with sterile PBS. At 1, 3, 5 days of infection, the pathological change of lung tissue was observed, the mass concentration of γ-interferon in bronchoalveolar lavage fluid and the expression levels of γ-interferon mRNA and Tol-like receptor 2 and Tol-like receptor 4 mRNA and protein in the lung tissue were determined. RESULTS AND CONCLUSION:Abscess, spores and very severe bleeding and congestion, widenened alveolar septum and tracheal epithelial cel shedding and necrosis were observed in the mouse lung tissue in the group B. At 5 days of infection, the mass concentration of γ-interferon in bronchoalveolar lavage fluid and the expression ofγ-interferon mRNA in the lung tissue in the group B were significantly decreased compared with the group A (P < 0.05). Tol-like receptor 2 expression was strongly positive in the group B. Tol-like receptor 2 expression in the group C was significantly lower than that in the group B (P< 0.05). Tol-like receptor 4 expression was positive in the groups B and C, and its expression in the group C was significantly greater than in the group B (P < 0.05). The expression of Tol-like receptor 2, 4 mRNA in the mouse lung tissue of group B was significantly increased at 1, 3, 5 days of infection (P < 0.05). These results suggest that atomizing high concentration of aspergilus fumigatus spore suspension to immunosuppressive mice can establish stable invasive pulmonary aspergilosis models with typical pathological features. The infection of aspergilus fumigatus can activate tol-like receptor 2, 4 at the same time, and the pathological mechanism is closely related to organism’s immune defense function.

Ahigh-resolutionmethodforhumanleukocyteantigen-B(HLA-B)genotypingwasestablished based on the optimized polymerase chain reaction, cloning and sequencing technology. The exon2 and exon3 of HLA-B gene were amplified with primers based on the HLA-B gene sequence. These produced heterozygous alleles were effectively cloned into plasmid DNA based on the principle of plasmid incompatibility, and were followed by bacterial culture. Then Sanger sequencing was carried out and after analyzing the result by software ClustalX2 and IMTG/HLA database comparison, the HLA-B genotype of the samples was achieved. Seven clinical samples were detected, and the results were consistent with those of PCR-SBT genotyping method. The method was cost-effective, high-resolution and it did not require technical software. The use of universal primers simplified the cumbersome design and optimization process of specific primers.

Objective To investigate the association between the neck circumference and central obesity in the elderly.Methods The neck circumference(NC),height,weight,waist circumference (WC) and hip circumference(HC) of 2820 subjects aged over 60 years were detected from some communities in Nanchang.All subjects were divided into different groups,according to the two different obesity indicators of WC and BMI.The relationship between NC and obesity was analyzed.A multiple linear regression analysis was conducted using the Enter method.An R()C curve analysis was employed to judge the tangent point of NC in central obesity.Results The height,weight and BMI were reduced along with age (all P＜0.05),and the waist hip ratio(WHR) was increased along with age(P＜0.01) in the elderly.The NC was decreased along with age in males(P＜0.01),and the WC was increased along with age in females(Pt＜0.01).The NC was longer in males than in females [(36.5±3.0) cm vs.(32.6±2.4) cm,P＜0.01].The NC was increased along with body weight,WC and BMI in the elderly:with each 1 kg increase in body weight,the NC was increased by 0.079 cm in males and 0.139 cm in females;with each 1cm increase in WC,the NC increased by 0.073 cm in males and 0.040 cm in females;with each 1 kg/m2 increase in BMI,the NC increased by 0.121 cm in males and 0.065 cm in females;with 1 year increase in age,the NC was decreased by 0.033 cm in males(all P＜0.05).when obesity was diagnosed according to both BMI and NC,the NC was longer in the obesity group than in the control group,(P ＜ 0.01).The area under receiver operating characteristic(ROC) curve of NC for diagnosing central obesity showed that the area was 0.802 and 0.743 in males and females,and the optimal cut-off value of NC was 36.85 cm and 31.75 cm in males and females,respectively.Conclusions NC is increased along with the increases of body weight,WC and BMI in the elderly.NC is significantly associated with central obesity.NC is more predictive of the central obesity when the value ＞36.85 cm in males and ＞31.75 cm in females.

Objective To analyze and assess the major functions of medical APP by investigating its application in self management of chronic diseases. Methods The 3 major functions of APP were analyzed, including data record and condition assessment, medical consultation, and life therapy. Results The medical APP possesses its basic functions for chronic diseases management. However, it lacks of practicality and convenience and its homogenization is severe. Conclusion The APP +hardware +cloud medical management model should be promoted by making use of the Internet + medical technology, the supervision of mobile medical APP should be strengthened, the mobile information management mechanisms of chronic diseases should be perfected, and the self management efficiency of patients with chronic diseases should be improved.

Object The polysaccharide (CDPS) was isolated, purified and identified from Cistanche deserticola Y. C. Ma, a Chinese materia medica. Methods The polysaccharide was extracted with hot water and precipitated by alcohol. Protein in the precipitates was removed by Sevag method. The products were further purified with column chromatography on DEAE-Sephadex A-50 and Sephacryl S-200. The CDPS was idendified by IR spectrum and UV (200-400 nm) scanning spectrum. Results IR spectrum indicates that there are typical characteristic absorption peaks of polysaccharides. UV scanning spectrum shows that there are no absorption peaks of protein and nucleic acid at point 280 nm and 260 nm. Conclusion The CDPS was identified as homogeneous one.