Objective To explore whether phenylalanine affect Cdc42, Racl, and RhoA expression and disturb dendritic development. To determine the effects of brain-derived neurotrophic factor (BDNF) on this process. Methods Neurons were cultivated up to 3 days and then treated with 0.9 mmol/L phenylalanine or 100 ng/ml BDNF. Dendritic number were determined by morphologic analysis. Cdc42, Racl, and RhoA protein expression were examined by Western blotting analysis. ResultsThe number of dendrites in cultured neurons reduced two days after being treated with phenylalanine,while BDNF could rescue this change(P < 0.01), furthermore, BDNF was found to inhibit phenylalanineinduced down-regulation of Cdc42, Racl, and RhoA protein expression(P < 0.01). Conclusions Our study indicated that the protective effect of BDNF against phenylalanine-induced neuronal injury is probably mediated by expression of Cdc42, Racl,and RhoA. It suggested a potential neuroprotective action of BDNF in prevention and treatment of brain injury in the patients with phenylketonuria.

OBJECTIVE To investigate the drug susceptibility of clinical isolates in local region for using antibiotic reasonably. METHODS Totally 3 170 strains of clinical isolates were identified by API and Microscan and tested for drug resistance against antimicrobial agents by K-B method. WHONET5.4 was applied for analysis. RESULTS The commonly encountered bacteria were Pseudomonas aeruginosa (24.3%), Acinetobacter baumannii (10.9%), Klebsiella pneumoniae (10.4%), Escherichia coli (8.9%), and Staphylococcus aureus (SA,8.0%). In Gram-negative isolates, the resistance rate to meropenem was 19.7%, and to piperacillin-tazobactam was 26.5%. The incidences of E.coli and K. pneumoniae isolates producing extended spectrum beta-lactamases (ESBLs) were 49.1% and 33.5%, respectively. In Gram-positive isolates, the susceptibility rate to vancomycin and teicoplanin both was 100.0%. The oxacillin resistant rates of SA and coagulase negative Staphylococcus (CNS) were 54.2.0% and 82.3%. CONCLUSIONS The production ratio of ESBLs and oxacillin resistance of bacteria in local region are high. It is important to promote the rational use of antimicrobial agents and take effective contaminant methods to reduce resistant rates of bacteria and dissemination of multi-resistant bacteria.

Systemic lupus erythematosus (SLE) is an archetypical systemic, autoimmune inflammatory disease , of which the mechanism still not unveiled. Studies on epigenetics in SLE have long been the subject of investigation and as part of epigenetics. DNA methylation has been confirmed to play a role in the pathogenesis of SLE. The high autore-activity of CD4~+ T cell from SLE patients is associated with DNA hypomethylation. DNA hypomethylation is crucial to induce SLE - like autoimmune disease in SLE - non - susceptible mice. The reactivation of inactive X chromosome by hypomethylation may lead to high incidence of SLE in women. Drug - induced SLE is also connected with DNA hypomethylation. To understand the role of DNA methylation in the onset of SLE comprehensively, we review the findings reported in the literatures about DNA methylation and SLE.

BACKGROUND: Previous experiments demonstrated that low-temperature isotropic pyrolytic carbon has excellent biological features. However, the research regarding low-temperature isotropic pyrolytic carbon prosthesis in hip joints, especially the biological features following hemiarthroplasty are poorly understood. OBJECTIVE: Utilizing implantation experiment, the aim of this study was to investigate the biocompatibility, as well as the interface wear properties of carbon femoral head prosthesis, coated with low-temperature isotropic pyrolytic carbon (silicon). DESIGN, TIME AND SETTING: In vivo hemiarthroplasty, randomized controlled animal experiment. The experiment was performed at the Experimental Animal Center, the Second Military Medical University of Chinese PLA, from October 2008 to April 2009. MATERIALS: Carbon femoral head prostheses.were supplied by Jilin Central Hospital. The carbon femoral head prosthesis was coated with low-temperature isotropic pyrolytic carbon. METHODS: Carbon femoral head prostheses were implanted in 16 adult New Zealand white rabbits. The rabbits were sacrificed at weeks 6 (n=4), 11 (n=6), 21 (n=6), respectively. Rabbits in the 21-week group were induced to move from 18 weeks with 2 hours per day. MAIN OUTCOME MEASURES: The biocompatibility and the interface wear phenomena of the prostheses were investigated by general observation, X-ray observation and tissue slice observation. RESULTS: The carbon femoral head prostheses implanted in animals produced non-toxic side effects, without significant inflammatory response or foreign body reaction. Furthermore, new cartilage tissue around carbon prosthesis was found, while there was no obvious wear debris after sports experiments. CONCLUSION: The film coating carbon materials have excellent biocompatibility and good wear resistance as femoral head prosthesis. Thus, it is a kind of promising biomaterials in prosthesis manufacturing.

Objective To compare the effects of salmeterol and fluticasone propionate combined montelukastin the treatment of patients with bronchial asthma.Methods Ninety-eight bronchial asthma patients from April 2014 to March 2016 in the Fourth People's Hospital Sichuan Province were selected anddivided into observation group and control group with 49 patients in each group according to the above principles by prospective study.The control group was given salmeterol treatment,and the observation group was added given montelukast treatment based on the control group.The treatment days were 15 d recorded the prognosis of the two groups.Results The total effective rates of the observation group and the control group were 95.9％ and 81.6％ respectively,the total effective rate of the observation group was significantly higher than that of the control group (P ＜ 0.05).The FEV1 and FVC values after treatment in the observation group and control group were significantly higher than before treatment (P ＜ 0.05),while the FEV1 and FVC values in the observation group after treatment were significantly higher than those in the control group (P ＜ 0.05).The scores of ACT scale after treatment of two groups were obviously higher than before treatment,and the score of observation group was statistically higher than control group after treatment (P ＜ 0.05).During treatment,there was no statistical significance on adverse reaction between two groups.Conclusion Salmeterol and fluticasone propionate combined montelukast in the treatment of patients with bronchial asthma can promote the improvement of lung function,so as to improve the quality of life and clinical treatment.

Objective To study the effects of tetrandrine on apoptosis of HeLa cervical cancer cells qualitatively and quantitatively. Methods We measured tetrandrine-induced inhibition of HeLa cell proliferation at different concentrations and time points by MTT assay. The rate of Hela cell apoptosis induced by tetrandrine was detected by flow cytometer and confocal laser scanning microscope (CLSM). Results Tetrandrine inhibited the proliferation of HeLa cells in dosage- and time-dependent manners. Flow cytometry showed that the apoptosis rate was (51.8±0.97)% at the concentration of 15μmol/L, which was significantly higher than that in the control group (24.3±1.23)% (P<0.05). The cells treated with tetrandrine showed typical apoptotic morphology under CLSM. Conclusion Tetrandrine can inhibit proliferation and induce apoptosis of HeLa cervical cancer cells.

Objective To investigate the expression levels of DNA methyltransferases 1, 3A and 3B in CD4+ T cells of MRL/lpr mice, and explore their relationship with the expression levels of methylation-sensitive genes (ITGAL, CD70). Methods CD4+ T ceils were isolated from spleens of 16-week-old MRL/lpr and BALB/c control mice by anti-CIM antibody labeled magnetic beads. Transcription levels of DNA methyhransferases 1, 3A and 3B and methylation-sensitive genes(ITGAL, CD70) were measured by real-time mice when compared with BALB/c control mice and the difference was significant (P<0.05), while the expression of DNMTI and DNMT3A showed a tendency of decrease (P>0.05). The mRNA expression of CD70 was significantly higher (P<0.01), but the expression of ITGAL had no significant difference between the two P<0.01 ). Conclusion Decreased expression of DNMT3B may attribute to the elevated expression of methylation-seusitive gene CD70, thus lead to the dysfunction of CD4+ T cell and play an important role in the pathogenesis of SLE.

Objective To investigate the clinical significance of soluble intercellular adhesion molecule‐1 and inflammatory factors (CRP ,IL‐17) in elderly patients with colorectal carcinoma .Methods The expression of sICAM‐1 ,CRP and IL‐17 in 76 ca‐ses of elderly patients and 32 cases of youg patients with colorectal cancer were detected by enzyme linked immunosorbent assay be‐fore and after surgery ,and to analyze its clinical significance correlated with pathological parameters .Meanwhile ,60 cases of healthy were controls .Results The serum levels of IL‐17 and sICAM‐1 were higher in patients with different ages of colorectal cancer than those of the normal control group (P<0 .05) ,and the concentrations of the two group after operation were significantly lower than those of the normal control group (P<0 .05) .The CRP levels of the young group and old group were similar to that of the normal control group (P>0 .05) .The level of CRP before operation in the young group was higher than that in the normal control group (P<0 .05) .The levels of serum IL‐17 and sICAM‐1 were significantly different between the young and the old group(P<0 .05) , while the CRP level was similar in the two groups (P>0 .05) .The serum levels of sICAM‐1 and IL‐17 in colorectal cancer patients were associated with the degree of differentiation ,depth of invasion ,lymph node metastasis and TNM staging (P<0 .05) .The level of CRP was significantly correlated with the depth of invasion ,lymph node metastasis and TNM staging (P<0 .05) .Conclusion The serum levels of sICAM‐1 ,CRP and IL‐17 reflect the invasion and metastasis of colorectal cancer in a certain extent ,which play important roles in predicting the development and prognosis of colorectal cancer .

Carcinoma ; pathology ; Carcinoma, Papillary ; Histiocytosis, Langerhans-Cell ; pathology ; Humans ; Thyroid Neoplasms ; pathology

Objective:To investigate the effect of lncRNA HOTAIR on the radiosensitivity of glioma cells and its underlying mechanism.Methods:The negative control plasmid, HOTAIR silencing plasmid, miR-NC over expressing plasmid, miR-17-5p over expressing plasmid were transfected into U87R cells, and assigned intothe silencing control, HOTAIR silencing, miR-NC over expressing and miR-17-5 pover expressing groups. Cells in the the above groups were irradiated at a dose of 4Gy, and recorded as silencing control+ 4Gy group, HOTAIRsilencing+ 4Gy group, miR-NC over expressing+ 4Gy group and miR-17-5p over expressing+ 4Gy group. The HOTAIR silencing plasmid, miR-NC suppressing plasmid and miR-17-5p suppressing plasmid were co-transfected into U87R cells and recorded as the HOTAIR silencing+ miR-NC suppressing group and HOTAIR silencing+ miR-17-5p suppressing group. All procedures were transfected by the liposome method. The expression of miR-17-5p and HOTAIR was detected by qRT-PCR. The radio sensitivity of glioma cells was evaluated by cell clone formation assay. The cell apoptosis was assessed by flow cytometry. The fluorescence activity was assessed by dual luciferase reporter assay.Results:HOTAIR was highly expressed in the radiation-resistant glioma cells. Silencing HOTAIR and over-expressing miR-17-5p could increase the radiosensitivity of U87R cells and promote radiation-induced apoptosis of U87R cells. HOTAIR could target and regulate the miR-17-5p expression. Suppressing miR-17-5p reversed the effect of silencing HOTAIR on U87R cell sensitization and promoting radiation-induced U87R cell apoptosis.Conclusions:Silencing lncRNA HOTAIR yields radiation sensitization and promotes radiation-induced apoptosis in glioma cells. The mechanism may be related to the regulation of miR-17-5p.