Objective To evaluate medical students′ achievements of studying through the practical base website for humanistic quality education. Methods Totally 61 students from school of nursing and 135 students from the first clinical medical college of Southern Medical University in Guangzhou were organized as volunteers. They were divided into the intervention group and the control group (98 people per group) in completely random method by the Random Number Generators of SPSS 20.0. With a two-month experiment, the humanistic knowledge scores and humanistic caring ability scores of these two groups were investigated by the Humanistic Knowledge Test Paper and the Caring Ability Inventory. And the learning effects of the website by the intervention group was evaluated with the self-designed questionnaire. Results There was no significant difference (P>0.05) between students in the intervention group and the control group when it came to general information. Before the experiment, the score of humanistic knowledge test paper, the total score of caring ability inventory, the score in the dimension of cognition, patience, and courage of the intervention group were 6.29 ± 0.58, 172.40 ± 10.00, 58.98 ± 4.22, 51.56 ± 5.22, 61.86 ± 6.40, the scores of the control group were 6.36 ± 0.63, 172.65 ± 13.49, 59.31 ± 4.05, 50.83 ± 6.56, 62.52 ± 7.28, there were no significant differences between the two groups (all P>0.05). After the experiment, the score of humanistic knowledge test paper, the total score of caring ability inventory, the score in the dimension of cognition and courage of the intervention group were 7.82± 0.62, 182.34 ± 12.78, 65.04 ± 9.12, 65.17 ± 6.58, the scores of the control group were 6.37 ± 0.60, 170.73 ± 8.92, 58.29±5.61, 62.36±6.90, there were significant differences between the two groups (t=2.92-16.67, all P<0.01). The scores in the dimension of patience of the intervention group and the control group were 52.12±3.60 and 51.02±4.34, and there was no significant difference (t=1.94,P>0.05). As shown by the evaluation made by students in the intervention group about the learning effect of the website, the average score was the highest in the field of skills (3.95 ± 0.58), followed by the cognitive field (3.92 ± 0.46) and emotional field (3.75 ± 0.66). Most of the respondents believed that web-based learning could deepen students′ understanding of humanistic quality education (4.13 ± 0.57), independent web-based learning could strengthen the application of online resources (4.06±0.59) and students could master communicative skills required in different situations through web-based learning (4.05 ± 0.58). Conclusions Students are satisfied with the practical base website for humanistic quality education, the website has rich learning contents and can improve students′ interests and motivation. Through web-based learning, humanistic knowledge and humanistic caring ability of students can be improved to some extent. But the website is still in development, it needs an evaluation indicators system in order to do further research for all application effects of the website.

Objective Toestablishthe concept and structure elements of the nurse humanistic practiceability. Methods Using documentandtheoretical analysis to definethe concept of the nurse humanistic practiceability. And usestructuralanalysis to explain the structural elementsto formDelphiexpert consultationquestionnaire, which was investigated for 18 experts in 5provinces includingnursing education, nursing management, nursing clinicalcare,medical humanitiesandhumanistic medicine,and eventually established thetheory and structure model of the nurse humanistic practiceability. Results The effective recovery rates of the questionnaire were 81.8%(18/22)and 100%(18/18). The authority coefficients were 0.924, and the total consistency coefficients were 0.307 and 0.367 with statistical significance. TheDelphi expert consultation has established the concept, six-level structural elementsand15sub-elements. And for the first-class,the average value was 3.94-5.00,the coefficients variation of was 0.00-0.20;for the secondclass,the average value was 3.89-5.00,the coefficient variation were 0.00-0.19. Conclusions The study onconceptand structure elements of nurse humanistic practice ability has completed, which provide theoretical basis for improvement of nurse humanistic practice ability.

Objective To investigate the current status and the related influencing factors of humanistic care quality of nurses in department of aged homes in Guangzhou,for the future to carry out humanistic care education,and provide a reference for improving humanistic care quality of nurses.Methods 270 nurses from 8 department of aged homes in Guangzhou were investigated by convenience sampling and evaluation table on humanistic care quality of nurses.The affected factors were analyzed by multiple stepwise regression.Results The aggregate score of humanistic care quality of nurses in this study was (113.59±9.78),which was lower than the reference score (118.36±16.75) of humanistic care quality of nurses of some general hospitals in Shanghai in 2010,offered by Liu Yuxiao,the designer of the evaluation table.The scores were correlated with 4 impact factors including home,politics status,care index of colleagues,whether to accept the education and training of humanistic care;multiple stepwise regression analysis indicated that care index of colleagues and whether to accept the education and training of humanistic care were the main factors.Conclusions Humanistic care quality of nurses in department of aged homes in Guangzhou was in lower level,and especially caring ability and the attitude towards caring.Department of aged homes should cooperate with universities,to establish a set of training courses on humanistic care quality of nurses in department of aged homes.Through the systematic,standardized training,to improve humanistic care quality of nurses and the quality of nursing service.

OBJECTIVEThis study aims to detect the expression level of interleukin-23 (IL-23) in tongue squamous cell carcinoma tissues and its relationship with clinical prognosis, as well as explore the anti-apoptotic and drug resistance of the tongue squamous cell line-SCC9 before and after treatment with IL-23.

METHODSThe expression of IL-23 in tumor tissues from 28 tongue cancer patients was analyzed by immunohistochemistry assay. Quantitative real-time polymerase chain reaction (qRT-PCR) was used to detect the mRNA expression of Wingless-related integration site (Wnt)1 and c-myc in SCC9 cells treated with different IL-23 concentrations. After interferencing the β-catenin with small interfering RNA (siRNA), the expression of β-catenin, B-cell lymphoma-2 (Bcl-2), ATP-binding cassette sub-family G member 2 (ABCG2), and permeability-glycoprotein (P-gp) in SCC9 was measured by Western blot analysis. The effect of IL-23 on the apoptotic resistance of SCC9 to cisplatin was examined by methyl thiazolyl tetrazolium test.

RESULTSThe expression of IL-23 in tongue cancer tissues was correlated with lymphatic metastasis, nerve invasion, and the recurrence after therapy (P<0.05). After dealing with IL-23, SCC9 showed the upregulation effect of Bcl-2, ABCG2 and P-gp expressions. IL-23 was closely related to the activation level of the Wnt pathway and significantly strengthened the resistance to cisplatin (P<0.01).

CONCLUSIONIL-23 activates the Wnt pathway in tongue squamous cell carcinoma, thereby enhancing its resistance to apoptosis and drug.

Apoptosis ; Carcinoma, Squamous Cell ; metabolism ; Cell Line, Tumor ; Cisplatin ; Drug Resistance, Neoplasm ; physiology ; Humans ; Interleukin-23 ; metabolism ; Interleukin-23 Subunit p19 ; Lymphatic Metastasis ; Neoplasm Recurrence, Local ; RNA, Small Interfering ; Real-Time Polymerase Chain Reaction ; Tongue Neoplasms ; metabolism ; beta Catenin ; metabolism

Humans ; Lymphoma, B-Cell, Marginal Zone ; genetics ; pathology ; Splenic Neoplasms ; genetics ; pathology

Objective:To investigate the stress distribution in peri-implant bone with All-on-4 implant with various parameters by three-dimensional finite element method.Methods:An edentulous mandibular specimen was scanned by CT Mimcs.Geomagic,Uni-graphics,HyperMesh modeling software were used to establish All-on-4 implant finite element models with different inclination angles and corresponding cantilever lengths.1 50 N vertical static load was applied at the right end of the cantilever,peri-implant bone stress was analysed using Abaqus software.Results:When the distal implant inclined 0°with cantilever length of 1 9.5 mm,the peak stress in peri-implant cortical bone at the mesial and distal side was 25.526 MPa and 83.026 MPa respectively.When the distal implant in-clined 1 5°,30°and 45°with the cantilever length of 1 7.2 mm,1 3.3 mm and 9.8 mm,the stress in perio-implant cortical bone at distal side of the implant reduced by 1 2.4%,35.6% and 53.1 %,that at mesial side of the implant reduced by 1 3.6%,36.3% and 40.2%,respectively.Conclusion:From the perspective of the stress analysis,the design of All-on-4 distal implant with large incli-nation angle and short cantilever is superior to that with small inclination angle and long cantilever.

The purpose of this study is to evaluate the embryotoxicity of alkaloids in Senecionis Scandentis Hebra on in vitro cultured mouse embryos. Mouse whole embryo culture (WEC) was applied in this study. Post-implantation (8.5 d) mouse embryos were isolated from their mothers, and cultured in medium of immediately centrifuged serum (ICS) with different concentrations of seneciphylline (target concentrations were 100, 50, 25 and 12.5 μg x mL(-1)) or senkirkine (target concentrations were 50, 25 and 12.5 μg x mL(-1)) for 48 h. After culturing completed, the development and organic morphodifferentiation of the cultured embryos were evaluated microscopically. Treatment with seneciphylline and senkirkine had adverse effects on the development and organic morphodifferentiation of embryos. The effect also had clear dose-response. Alkaloidals in Senecionis Scandentis Hebra had embryotoxicity on cultured embryos, which indicated that pregnant people exposed to Senecionis Scandentis Hebra may get potential risk on fetus.

Objective To evaluate the effect of hydrogen peroxide (H2O2) on autophagy in melanocytes,and to explore its possible regulatory mechanisms.Methods Normal human melanocytes at exponential growth phase were divided into several groups:blank control group receiving no treatment,positive control group treated with 100 nmol/L sirolimus solution,and experiment groups treated with H2O2 solution at different volume fractions of 10-7-10-3 respectively.After 4-hour treatment,cell counting kit-8 (CCK-8) assay and flow cytometry were performed to evaluate the cellular proliferative activity and detect apoptosis of melanocytes respectively.Acridine orange staining was performed to detect autophagosome formation,transmission electron microscopy to observe ultrastructural changes of autophagosomes,and Western blot analysis to measure the expression of autophagy-specific protein Beclin 1 and microtubuleassociated protein 1 light chain 3B (LC3B).A total of 84 autophagy-related genes were analyzed by RT2 Profiler PCR Array,so as to screen differentially expressed autophagy-related genes.Results After the treatment with H2O2 at different volume fractions of 10-3,5 × 10-4,10-4,5 × 10-5,10-5,5 × 10-6 and 10-6,experiment groups showed significantly decreased cellular proliferative activity,but significantly increased apoptosis rate compared with the blank control group (F =286.95,301.23,respectively,both P ＜ 0.05).With the increase in volume fractions of H2O2,the cellular proliferative activity was significantly gradually decreased (P ＜ 0.05),while the apoptosis rate showed an opposite trend (P ＜ 0.05),except that the 5 ×10-6 H2O2 group showed no significant differences in the apoptosis rate compared with the 10-5 H2O2 group and 10-6 H2O2 group.Acridine orange staining and electron microscopy showed autophagosome formation in the 10-5 H2O2 group,10-6 H2O2 group and positive control group.Western blot analysis revealed that Beclin1 expression and LC3B-Ⅱ/LC3B-Ⅰ ratio were significantly higher in the 10-5 H2O2 group,10-6 H2O2 group and positive control group than in the blank control group (all P ＜ 0.05).RT2 Profiler PCR Array showed significant up-regulation of ATG12,ATG3,ULK1,PIK3CG,PTEN and PIK3C3 genes and significant downregulation of EIF2AK3 gene in the 10-5 H2O2 group,10-6 H2O2 group and positive control group compared with the blank control group.In the 10-5 H2O2 group and positive control group,the mTOR gene was significantly up-regulated,and the ULK2 gene was significantly down-regulated.The 10-6 H2O2 group showed no obvious changes in the expression of mTOR gene,but significant up-regulation of AMPK and JNK1 genes.Conclusion H2O2 at volume fractions of 10-5 and 10-6 can induce autophagy in melanocytes,likely by influencing the expression of some related signaling molecules.

Objective To establish a method for the determination of protocatechuic acid, salidroside, and chlorogenic acid in Sargentodoxa cuneata. Methods The separation was performed on a Waters XSELECT CSH C18 (150 mm × 4.6 mm, 5 μm) with methanol-acetonitrile-0.2 % phosphoric acid as the mobile phase in a gradient elution at a flow rate of 0.8 ml/min. The detection wavelength was 260 nm and the column temperature was 35 ℃. Results The linear ranges of protocatechuic acid, salidroside, and chlorogenic acid were 0.0020-0.0120, 0.0600-0.3602, 0.0750-4.5006 mg/ml, respectively. The average recoveries were 98.01% (RSD=0.07%), 98.53 % (RSD=0.12%), and 101.10 % (RSD=1.92%), respectively. Conclusions The method is simple, accurate, and highly reproducible, which could provide the scientific evidence for the quality control of Sargentodoxa cuneata.

AIM: To investigate the effects of myocardial remodeling of aged left atrium (LA) on atrial ar-rhythmogenesis in rabbits .METHODS:The male New Zealand rabbits were divided into young LA and aged LA groups . By observing the changes of monophasic action potential ( MAP) and burst-pacing in LA of the rabbits in vivo, the main cardioelectrophysiological parameters such as resting membrane potential ( RMP) , action potential amplitude ( APA) , ma-ximum rise veloctiy of action potential (dv/dtmax), plateau potential and action potential duration at 30%, 50%and 90%( APD30 , APD50 and APD90 ) , as well as the inducibility and duration of atrial arrhythmias were recorded .L-type calcium current (ICa,L) was analyzed via whole-cell patch-clamp technique in enzymatically dissociated single rabbit LA myocytes . The myocardial collagen content was quantified after Masson staining , and the ultrastructure of the LA cells was observed under scanning electron microscope .The expression of Cav 1.2 in LA tissue of the 2 groups was detected by Western blot . RESULTS:Compared with young LA group , dv/dtmax and plateau potential were significantly decreased , APD30 and APD50 were shortened, and APD90 was notably prolongated in aged LA group (P<0.01).The inducibility or duration of atrial arrhythmias was severely increased or prolongated in aged LA group (P<0.01).With voltage clamp model, the den-sity of ICa,L in aged LA group was significantly decreased , and current-voltage curve was notably moved upward compared with young LA group.When the clamp potential was +20 mV, the density of ICa,L was notably modified from (11.72 ± 1.39) pA/pF in young LA group to (6.08 ±0.98) pA/pF in aged LA group ( P<0.01).Compared with young LA group, the protein level of collagen was significantly increased (P<0.01), and the arrange of atrial myocytes was irregular in LA of rabbits in aged LA group .The atrial myocytes of the LA wall in aged LA group exhibited abnormal ultrastructural alterations , such as karyopyknosis , irregular and swelling mitochondria with the presence of vacuoles , and mild and severe sarcomere degeneration .Compared with those in LA tissues of young rabbits , the expression levels of Cav 1.2 in the LA tis-sues of aged rabbits were severely reduced (P<0.01), and had a significant positive correlation with the reduction of ICa,L (r=0.83, P<0.01).CONCLUSION:The pathophysiological characteristics of aged LA are significantly altered , and might contribute to vulnerability and susceptibility of occurrence of atrial fibillation in aged rabbits .The mechanisms might completely attribute to the notable reduction of ICa,L , abnormal alterations of ultrastructures and obvious decrease in the ex-pression of Cav1.2 in the aged LA of aged rabbits .