Objective To investigate the effects of mirtazapine in combination with gemcitabine on food intake,body weight and tumor growth of human pancreatic carcinoma xenografts in nude mice.Methods 24 subcutaneous pancreatic cancer xenograft nude mice were randomly divided into control group,gemcitabine group(receiving 100 mg/kg gemcitabine i.P.on days 1,4,7 and 10 after operation)and combination group (gemcitabine as above and mirtazapine,10 mg·kg~(-1)·d~(-1),orally feeding for 21 days),with 8 mice in each group. All mice were sacrificed at day 21.Food intake,body weight and tumor size were compared among three groups.Results Gemcitabine group showed significant anti-tumor effects,but adverse effects such as decreasing food intake and body weight Was also noted. On days 21,there Was no significant difference in tumor size between combination group and gemcitabine group.The tumor inhibition rates of the two groups were 69.13%and 71.60%respectively(P>0.05).The food intake of mice and body weight[(3.12±0.11)g and(14.68±0.42)g]in combination group were slightly greater than these of gemcitabine group[(2.96±0.14)g and(14.38±0.61)g,P>0.05],but these parameters were significantly lowerthan those of control group[(4.65±0.13)g and(17.46±0.52)g,P<0.05].Conclusions Gemcitabine chemotherapy showed significant anti-tumor effects. Mirtazapine cannot significantly enhance the anti.tumor effect of gemcitabine. However,mirtazapine could alleviate adverse events of gemcitabine to some extent.

Objective To investigate the effect of different antidepressants (mirtazapine and fluoxetine) on food intake, body weight, tumor growth in a mouse model of pancreatic cancer. Methods A subcutaneous xenograft mouse model of human pancreatic cancer SW1990 was established. The tumor-bearing mice were randomly divided into saline solution control group, mirtazapine group, fluoxetine group, with 7 mice in each group. All mice were treated once daily with saline solution, mirtazapine (10mg·kg-1·d-1), fluoxetine (10mg· kg-1·d-1), orally by using metal garage feeding needles for 42 days. Tumor size, body weight, food intake were investigated. Results There was no significant difference in tumor size in the three groups. From the 2nd week, the food intake of mice in the mirtazapine group significantly increased compared with other two groups; the body weight of mice in the mirtazapine group at the 4th week was (16.00±1.41) g, which was higher than those in other two groups (P<0.05); from the 3rd week, the food intake of mice in the fluoxetine group significantly decreased compared with control group, and the body weight also decreased significantly from the 6th week (P<0.05) ; at the 6th week, the food intake of mice in the control, mirtazapine and fluoxetine groups were (3.54±0.13)g, (4.19±0.16)g and (3.34±0.13)g, and the body weight were (13.71±1.11)g, (14.86±1.68)g and (12.57±1.51)g, respectively. Conclusions Mirtazapine was better than fluoxetine in increasing food intake and alleviating body decreasing on a pancreatic cancer mouse model. However, there was no significant effect on the pancreatic tumor growth.

Bacterial cellulose (BC) is a high-purity nanometer cellulose secreted by some bacteria. Compared with plant cellulose, it possesses an array of unique properties, including high crystallinity, high water content, good bio-compatibility, high mechanical strength and an ultra-fine fiber network. BC is prosperous as a new type of biomedical material, which has medical applications such as wound dressing, artificial skin, artificial blood vessels and tissue engineering scaffolds. There are, however, some problems to be solved on the large-scale application of BC, such as the high cost, low yield, and poor mechanical stability and so on.
Bacteria ; chemistry ; Bandages ; Biocompatible Materials ; Cellulose ; chemistry ; Nanostructures ; chemistry ; Skin, Artificial ; Tissue Engineering ; Tissue Scaffolds

Objective Few studies are reported on the radicular groove and root canal variation of the mandibular first premolar.This study aimed to observe the root canal system and root variation of the mandibular first premolar by cone-beam computed tomography (CBCT).Methods We selected CBCT images of 643 mandibular first premolars of 336 patients and subjected the data obtained to statistical analysis.Results Of the 643 mandibular first premolars, 637 (99.1％) had a single root and the other 6 had double roots;502 (78.1％) had a single root canal, 133 (20.7％) had two, 5 (0.78％) had three, and 3 (0.47％) presented C-shaped root canal morphology.The average length of the 643 mandibular first premolars was (13.2±1.5) mm and the mean distance from the apical foramen to the anatomical apical end of the root was (0.93±0.35) mm.Totally, 123 (19.1％) of the mandibular first premolars had a radicular groove, of which 94 (76.4％) had double root canals and the root canal systems included typesⅠ in 24 (19.5％), Ⅱ in 2 (1.6％), Ⅲ in 19 (15.4％), Ⅳ in 1 (0.8％), Ⅴ in 69 (56.1％), and Ⅶ in 3 (2.4％).Conclusion The root canal system of the mandibular first premolar has a significant variation.CBCT can reveal the complex anatomical structure of the mandibular first premolar and provide reliable evidence for the root canal treatment.

Objective To investigate the effects of Livin antisense oligonucleotide (ASODN) on the proliferation and apoptosis of human leukemia (K562) cells. Methods Specific phosphorothioate ASODN and missense oligonucleotide (MSODN) target Livin mRNA were synthesized and transfected into K562 cells following cationic liposome. The proliferation inhibition of K562 cells was assessed by MTT. The apoptosis rate of each group was detected by Annexin V-FITC. The expression of Livin mRNA was detected by reverse transcription polymerase chain reaction (RT-PCR). Results ASODN at a final concentration of 600 nmol/Lcould inhibit the K562 cells proliferation (IR) was (52.99t2.67) % and the expressions of Livin mRNA (ODR)was (59.75±3.24) %, the apoptosis rate was apparently increased [(36.89±1.08) %] (P ＜0.01); but the difference between Lip-MSODN group, Lip control group and cell control group was not statistically significant (P ＞0.05).Conclusion Livin ASODN may decrease Livin gene expression, suppress K562 cells proliferation effectively, and induce significant apoptosis of K562 cells.

This paper utilizes ASP technique and SQL database to design and construct the website of dental laboratory center in stomatology hospital. With basic content,the website consists of foreground display and back management,which shows good interaction and maintainability. The construction of the website is beneficial to the development of dental laboratory center.

Objective To investigate the expression ofTNF- α mRNA and cytokeratin 20(CK20)mRNA in different tissue of colonic cancer patients, and the relations between the expression and the classify,invasion, as well as Dukes stage of colonic cancer. Methods RT-PCR method was used to detect the ex-pression of TNF-α mRNA and CK20 mRNA in 30 cases of colonic cancer, included cancer tissue,para-cancer tissue and normal tissue. Results The positive rate of TNF- α mRNA expressions in cancer tissue, para-cancer tissue and normal tissue were 70.0%, 43.3% and 20.0%, and the positive rate of CK20mRNA expressions were 63.3%, 33.3% and 16.7%, there were significant difference among the three tissues(P ＜ 0.01 ). But the expression of CK20 mRNA in para-cancer tissue had no significant difference compared with normal tissue (P＞ 0.05). The expression ofTNF- α mRNA was closely correlated with that of CK20mRNA.TNF- α mRNA and CK20 mRNA showed no significant difference in expressing of colonic cancer tissue (P ＞ 0.05 ), but TNF- α was closely correlated with Duke stage and depth of tumor invasion (P ＜ 0.05 ).Conclusion The expression of TNF- α mRNA is objective indicator associated with the invasion of the colonic cancer.

Objective To investigate the effect of CHRNA1 genetic polymorphism on neuromuscular blockade induced with rocuronium. Methods Ninety-five ASA Ⅰ or Ⅱ patients of both sexes (age 18-64 yr,BMI 18-25 kg/m2 ) undergoing elective intra-abdominal surgery under general anesthesia were divided into 3 groups according to their genotypes: group Ⅰ AA ( n = 71 ); group Ⅱ AG ( n = 19) and group Ⅲ GG ( n = 5). ECG,BP, HR and SpO2 were continuously monitored during anesthesia. Neuromuscular function was assessed by response of adductor pollicis muscle to stimulation of the ulnar nerve using TOF-Watch SX monitor. Genomic DNA was extracted by using proteinase K digestion followed by a salting out prosedure. rs16862847 polymorphisms were analyzed by PCR-restriction fragment length polymorphism analysis and direct sequence analysis. Anesthesia was induced with fentanyl 4 μg/kg and propofol 2 mg/kg. Rocuronium 0.2 mg/kg was injected iv as soon as the patients lost consciousness. Results The twitch height of adductor pollicis muscle was significantly decreased in group AG and GG as compared with group AA ( P ＜ 0.05). There was no significant difference between group AG and GG.Conclusion CHRNA1 genetic polymorphism can influence the neuromuscular blockade induced with rocuronium,indicating that the genetic factor is one of the reasons contributing to the individual variation in neuromuscular blockade induced with muscle relaxants in patients.

ABSTRACT:Objective To evaluate the clinical therapeutic effect and safety of tumor necrosis factor alpha (TNF-α)blockers in treating moderately to severely active ulcerative colitis (UC)by meta-analysis.Methods Such databases as the Cochrane Central Register of Controlled Trials,PubMed,OVID,Embase,ISI,CBM,CNKI, VIP,and WanFang Data were searched from establishment to June 2013.All randomized clinical trials (RCTs)on tumor necrosis factor alpha blockers in treating UC were collected,and then selected on the basis of the inclusion and exclusion criteria.We assessed the methodological quality,extracted the data from the included articles and performed the meta-analysis with Revman 5.1.Results A total of 13 RCTs involving 3334 patients were analyzed.TNF-αblockers group was superior to the control group in the short-term clinical response (OR =2.5 1, 95% CI 1.73,3.64),short-term clinical remission (OR =2.74,95% CI 1.80,4.1 6),long-term clinical response (OR =2.98,95% CI 1.98,4.47),1ong-term clinical remission (OR =2.64,95% CI 1.89,3.67),and mucosal healing (OR =1.89,95% CI 1.39,2.59)compared with control group.TNF-αblockers could also reduce the rate of colectomy (OR =0.61,95% CI 0.41,0.89)and improve inflammatory bowel disease questionnaire scores (MD=14.74,95% CI 1 1.43,18.06 ).There was no significant difference between the two groups in all reported adverse effects (OR =1.14,95% CI 0.97,1.34)and serious adverse effects (OR=0.78,95% CI 0.56,1.09).Conclusion Compared with conventional therapy or placebo,TNF-αblocking agents can improve the therapeutics effect on UC in clinical response,clinical remission and mucosal healing,and also can reduce the rate of colectomy. In patients with moderately to severely active UC treated with TNF-α blocking agents,it is easier to achieve the improvement of life quality.TNF-αblocking agents treatment is safe for UC.This conclusion should be verified with more large-scale and high-quality RCTs.

Objective To evaluate ELISA combined with chemiluminescence in the detection of syphilis specific antibodies. Methods 628 patients who came to our hospital and treated in dermatology department were recruited in the study from January 2014 to April 2014.Patients′serum samples were detected by using ELISA firstly,and then the samples,the test rusults of which were within the recheck standard range(0.5