ObjectiveTo improve the teaching quality of medical humanity education in medical university.MethodsA cluster sampling survey was given to 448 sophomores who studied the outline of medical humanities course in military medical university,and the data were descriptively and statistically analyzed.ResultsThe survey shows that 90％ sophomores satisfy with this course,95％ sophomores understand the importance of medical humanity education,and the students have more requirements on education resources and teaching ways.ConclusionOutline of medical humanities course is important to cultivate the medical humanity spirit of medical students,and the course still needs more improvements.

Objective:To analyze clinical and pathological features of Reed nevi (pigmented spindle cell nevi) .Methods:The clinical and pathological data were collected from 26 patients with Reed nevi, who visited Department of Dermatology of Xijing Hospital from January 2015 to June 2019, and analyzed retrospectively.Results:Among the 26 patients, 15 were males, and 11 were females. Their average age of onset was 17.35 years, and median age of onset was 13.85 years. Reed nevi occurred predominantly on the lower limbs (12 cases) , followed by the face (6 cases) , upper limbs (5 cases) and trunk (3 cases) . All the skin lesions were black in color, and 7 cases presented with maculae, 19 with flat papules, 22 with quasi-circular skin lesions, and 4 with irregular skin lesions. The diameter of skin lesions ranged from 2 to 10 mm, and 23 cases had skin lesions with a diameter of ≤ 5 mm. As histopathological examination showed, pathological subtypes included junctional nevus (15 cases) and compound nevus (11 cases) ; melanocytes were spindle-shaped with obvious cytochromes in 26 cases; nevus cell nests merged with the surrounding epidermis in 4 cases, and obvious fissures were formed between nevus cell nests and the surrounding epidermis in 22 cases; no obvious cell atypia or mitotic figure was observed in any of the 26 cases, and Kamino bodies were observed in 6 cases. All the skin lesions were resected by surgery, and no recurrence was observed during the follow-up of 1 - 5 years.Conclusion:Reed nevi can manifest as irregular lesions, pagetoid distribution of spindle cells of various sizes can be observed histopathologically, and they need to be differentiated from melanoma.

Objective In this study,we aimed at investigating the clinical,laboratory and management characteristics of adolescent-onset SLE patients compared with adult-onset SLE patients.Methods 470 fe- male patients with SLE were divided into two subgroups:adolescent-onset SLE patients and adult-onset SLE patients.The analyzed variables included clinical,laboratory parameters,damage index and outcome charac- teristics.Results In 470 female patients with SLE,there were 98(20.85%)adolescent-onset SLE patients. The following manifestations occurred more frequently in adolescent-onset SLE patients:malar rash,cutaneous vasculitis,proteinuria and abnormal liver function.Adolescent-onset SLE patients had more severe disease features and had significantly higher mean value of SLEDAI.Mortality was higher in adolescent-onset SLE pa- tients than aduh-onset SLE patients.Renal and blood system were the organs that most frequently involved. Conclusion Adolescent-onset SLE patients accounts for roughly 20.85% of all SLE cases.It is necessary to pay more attention to adolescent-onset SLE patients because the management for them is usually more difficult and the prognosis is usually poorer than aduh-onset SLE patients.

the mutative strain, after excerpted the optima formula of medium for seeds and fermentation with the method of orthogonal design, were mutagenesised by UV, 60 Co and so on. The production of mutant was enhanced to 150% of the original one.

Introduction:The 2010 targets of the China Hepatitis B Prevention Programme were a prevalence of hepatitis B surface antigen (HBsAg) less than 1.0% for children less than five years old and less than 6.0% for the total population. This survey assessed the prevalence of Hepatitis B infection in Lianyungang, Jiangsu province, China in 2009–2010.Methods:Multistage sampling was used with 2372 subjects among 17 selected villages. Blood specimen collection and testing by enzyme-linked immunosorbnet assay (ELISA) were completed using the following markers for hepatitis infection: HBsAg and antibody to HBsAg (anti-HBs); hepatitis B e antigen (HBeAg) and antibody to HBeAg (anti-HBe); and hepatitis B core antibody (total anti-HBc). The data were analysed with Epi Info, version 3.3.2.Results:The prevalence of HBsAg was 2.4% (95% Confidence Interval [CI]: 1.8–3.0; Adjusted Prevalence [AP] 2.9%); anti-HBs prevalence was 51.1% (95% CI: 49.1–53.1; AP 49.2%) and total anti-HBc prevalence was 41.7% (95% CI: 39.8–43.7; AP 45.5%). The prevalence of HBsAg and total anti-HBc positivity increased from young to older age groups, yet the prevalence of anti-HBs positivity decreased from young to older age groups (P< 0.001 for all). There was no difference in the prevalences of HBsAg and anti-HBs among females and males (P= 0.108 and 0.089), but females had a higher prevalence than males for total anti-HBc positivity (P< 0.001). Discussion: This survey showed that in 2010 the prevalence of HBsAg among children aged less than five years was lower than the national target of 1.0% and that the prevalence of HBsAg for the total population was lower than the national target of 6.0%.

In order to construct a lentiviral vector carrying human VE-cadherin gene, and to express VE-cadherin in Sup-B15 cells, the VE-cadherin gene was amplified by RT-PCR from the human placenta, and then cloned into pCR-Blunt vector. The VE-cadherin DNA fragment was subcloned into pLB vector to generate a lentiviral vector pLB-VEC. Recombinant lentivirus was generated by co-transfection of three-plasmids into 293FT packing cells using lipofectamine 2000. The Sup-B15 cells were transfected by the lentivirus. The post-transfected Sup-B15 cells were observed by microscopy and flow cytometry. Western blot was used to determine the expression of VE-cadherin. The results showed that the VE-cadherin DNA fragment was amplified from human placenta and was cloned into pCR-Blunt vector, the recombinant lentiviral vector pLB-VEC was successfully constructed. High titer lentivirus was prepared by 3-plasmid packing system, and transfected into Sup-B15 cells in vitro effectively. The obviously morphological changes occurred in transfected cells, the expression of VE-cadherin protein could be detected in Sup-B15 cells via flow cytometry and Western blot. It is concluded that the lentiviral vector pLB-VEC carrying human VE-cadherin gene is successfully constructed; VE-cadherin gene is expressed in Sup-B15 cells via lentiviral vector transfection, which provides an optional tool for further study on the mechanism of VE-cadherin controlling leukemia development.
Antigens, CD ; genetics ; Cadherins ; genetics ; Cell Line, Tumor ; Genetic Vectors ; Humans ; Lentivirus ; genetics ; Plasmids ; Recombinant Fusion Proteins ; genetics ; Transfection

In the study, the effects of Panax notoginseng saponins (PNS) on alveolar epithelial to mesenchymal transition (EMT) and extracellular matrix degradation were observed in a type of human alveolar epithelial cell, A549 cells, stimulated by TGF-beta1. Firstly, MTT method was applied to evaluation of cellular proliferation and found that PNS from 12.5 mg x L(-1) to 200 mg x L(-1) dosage could not inhibit significantly cellular proliferation. Then, cells were divided into five groups, normal group, TGF-beta1 group, TGF-beta1 + 50 mg x L(-1) PNS group, TGF-beta1 + 100 mg x L(-1) PNS group and TGF-beta1 + 200 mg x L(-1) PNS group. Normal cells were not stimulatec by TGF-beta1; TGF-beta1 cells were only stimulated by TGF-beta1 and the other cells were stimulated by TGF-beta1 with different doses of PNS, respectively. After stimulation, cells and supernatants were collected for assays. Cellular roundness was applied to quantitative evaluation of morphological change. Immunocytochemistry was applied to examine E-cadherion, a-SMA and FN proteins expression in the cells. Enzyme linked-immunosorbent assay was applied to MMP-9 and TIMP-1 levels. The results showed that EMT of A549 cells was induced by TGF-beta1, showing significant change of roundness, E-cadherion, alpha-SMA and FN (P < 0.05, P < 0.01). Compared to TGF-beta1, PNS significantly inhibited the changes of roundness (P < 0.05), FN and alpha-SMA (P < 0.05, P < 0.01) and not significantly inhibited the change of E-cadherion. Furthermore, MMP-9 levels were significantly increased by TGFbeta1 stimulation (P < 0.05), without significant change of TIMP-1. Compared with TGF-beta1, PNS could significantly increase MMP-9 level (P < 0.05) and decrease TIMP-1 levels (P < 0.05, P < 0.01). In conclusion, PNS could inhibit alveolar epithelial cell EMT induced by TGF-beta1, with increase of extracellular matrix degradation ability, which showed anti-fibrosis of lung ability.
Cell Proliferation ; drug effects ; Drugs, Chinese Herbal ; pharmacology ; Epithelial-Mesenchymal Transition ; drug effects ; Humans ; Matrix Metalloproteinase 9 ; metabolism ; Panax notoginseng ; chemistry ; Pulmonary Alveoli ; cytology ; drug effects ; metabolism ; Saponins ; pharmacology ; Transforming Growth Factor beta1 ; metabolism

Objective To investigated the effects of combined arsenic trioxide(ATO) and resveratrol(Res)on the viability of NB4 human leukemia cells. Methods NB4 human leukemia cell was used in this experiment.Cells were cultured in ATO (0,0.1875,0.3750,0.7500, 1.1250, 1.5000,2.2500,3.0000,5.0000 μmol/L) and Res (0, 1.5625,3.1250,6.2500, 12.5000, 18.7500,25.0000,37.5000,50.0000 μmol/L). Cell viabilities were measured by MTT in different treatment groups. Half inhibitory concentration(IC50) was calculated. The ratio of concentration of ATO and Res 1.5∶ 18,1.5∶ 25,1.5∶ 35 was added to cells, and the combination index(CI) was calculated. The level of ROS in control, ATO( 1.5000 μmol/L), Res(25.0000 μmol/L) and ATO(0.9000 μmol/L) + Res( 12.5000μmol/L) groups was measured by chemiluminescence assay. Results ①ATO( ≥0.7500 μmol/L) reduced the viability of NB4 cells in a concentration-dependent manner(P ＜ 0.05 ), and IC50 was (1.78 ± 0.11 )μmol/L. ②)Res (≥18.7500 μ mol/L) dose-dependently decreased the viability of NB4 cells (P ＜ 0.05 ), and IC50 was ( 18.71 ±0.18)μ mol/L. ③Combination of ATO and Res showed an antagonistic effect on NB4 cells viability. ④The ROS in Res group( 1670.55 ± 13.97) was significantly lower than that in control group(2345.88 ± 14.48,P ＜ 0.05). The ROS in ATO group (3092.42 ± 94.84) was significantly higher than that in control group(P ＜ 0.05). The ROS in ATO + Res group (1860.27 ± 15.99) was significantly lower than that in ATO group(P ＜ 0.05). Conclusions NB4 cell survival rate can be decreased by ATO and Res. The combination of arsenic trioxide and Res presents an antagonistic effect on NB4 cell viability, in part by reducing intracellular ROS formation.

italic>Psidium guajava Linn. is an evergreen shrub or small tree of Psidium Linnaeus in the Myrtaceae family. One new glycoside (1) together with 3 known meroterpenoids (2-4) and 9 known glycosides (5-13) were isolated from the fruits of Psidium guajava Linn.. The structure of the new compound was elucidated by the spectroscopic data analysis of HR-ESIMS, 1D- and 2D-NMR, and it was named psiguaoside A (1). The known compounds were identified as guajadial (2), 4,5-diepipsidial A (3), psidial A (4), chrysin-8-C-β-D-glucoside (5), 2,6-dihydroxy-3,5-dimethyl-4-O-β-D-glucopyranosyl-benzophenone (6), quercetin-3-O-β-D-glucopyranoside (7), quercetin-3-O-xyloside (8), guaijaverin (9), avicularin (10), guavinoside E (11), guavinoside B (12), guajaphenone A (13). In the bioactivity assay, compound 3 exhibited significant inhibitory activitiy of U87 with IC₅₀ values of 8.379 μmol·L^-1.

This study was aimed to clone the gene coding mouse fibroblast growth factor receptor-1 (fgfr1), to construct the recombinant lentiviral vector of truncated form fgfr-1 (Δfgfr1) carrying enhanced green fluorescence protein (EGFP) and to investigate its expression in eukaryotic cells (293FT cells). The full length fgfr1 gene was cloned by RT-PCR using brain tissue of BALB/c fetal mouse as template and inserted into PCR-Blunt vector, a truncated fgfr1 fragment was produced by site-directed mutagenesis for deleting intracellular phosphorylated domain, then was subcloned into a lentiviral vector and cotransfected into 293FT packaging cells together with envelope plasmid and packaging plasmid by lipofectamine 2000. Viruses were gathered and concentrated using ultracentrifuge, and then transfected into 293FT cells. Expression of EGFP was detected by fluorescent microscopy and flow cytometry (FCM), and the truncated FGFR1 protein was detected by Western blot. The results demonstrated that mouse fgfr1 gene was cloned and the lentiviral expression vector LV-IRES-EGFP-Δfgfr1 and control vector LV-IRES-EGFP were successfully constructed. The lentiviral particles were correctly packaged, and the virus titers were above 10(8) TU/ml in the supernatant after concentration. Expression of EGFP was detected by fluorescent microscopy in 293FT cells post transfection, and the transfection efficacy was > 95% determined by FCM. Expression of FGFR1 protein detected by Western blot was significantly higher than that in control group. It is concluded that the truncated gene fgfr1 along with the gene coding EGFP is successfully inserted into a lentiviral vector to construct a recombinant lentiviral vector, which can be expressed in eukaryotic cells.
Animals ; Cell Line ; Genetic Vectors ; Humans ; Lentivirus ; genetics ; Mice ; Mice, Inbred BALB C ; Plasmids ; Receptor, Fibroblast Growth Factor, Type 1 ; genetics ; Recombinant Fusion Proteins ; genetics ; Transfection