Objective To evaluate the sterilization effect of Er:Yag laser irradiation combined with 2%chlorhexidine gel on single tube premolar enterococcus faecalis infection model.Methods After disinfection test was performed without molars bacterial infection,200 single rooted premolar root canal were selected.10μL enterococcus faecalis( ATCC 29212) bacterium suspension were inoculated into single intratracheal with high pressure sterilization and and then were cultured for 2 weeks.200 infected premolar model were divided into four groups:control group (n=50),A group (n=50),B group (n=50) and C group (n=50).The control group did not receive any disinfec-tion treatment,group A received Er:Yag laser irradiation and 2%chlorhexidine gel disinfection,B group received only Er:Yag laser irradiation,the C group received only 2% chlorhexidine gel disinfection.After disinfection,premolars were put into 10mL sterile water,mixed thoroughly,and then 1mL liquid were taken and diluted by10 times.Then the 200μL dilutions lipuid were coated on BHI agar plate,and plate could be selected for counting colony count.Results The average number of colonies was(127 ±12) in the control group,average number of group A(10 ±3) and which was lower than that group C (48 ±6)(t=12.005,P=0.000) and group C (43 ±5) (t=19.277,P=0.000). There were only 2 cases,which had obvious ablation phenomena in group A.Conclusion Disinfection effect of Er:Yag laser irradiation combined with 2%chlorhexidine gel is better than that of Er:Yag laser irradiation or 2% chlo-rhexidine gel disinfection.The incidence rate of the ablation phenomenon was low.

Acute Coronary Syndrome ; therapy ; Angioplasty, Balloon, Coronary ; Humans

Objective: To study whether interleukin (IL)-18 is involved in the activation of monocytes through direct contact with T cells and the related intracellular mechanism. Methods: T cells and monocytes were isolated and purified from the peripheral blood of healthy donors by magnetic beads. Phytohemagglutinin (PHA) pre-stimulated T cells were fixed by 1% paraformaldehyde and were then co-cultured with monocytes at a T cell: monocyte ratio of 4:1. TNF-α and IL-18 levels in the supernatants were assayed by ELISA. Expression of IL-18 receptor α chain (IL-18Rα) on the surface of monocytes was analyzed by flow cytometry. Results: Monocytes activated by PHA-stimulated T cells produced significantly more TNF-α than by unstimulated T cells; non-cultured T cells or monocytes hardly produced any TNF-α. Upon direct cellular contact, PHA prestimulated T cells also up-regulated IL-18Rα expression on the surface of monocytes and induced IL-18 production in monocytes, which could be suppressed by nuclear factor (NF)-κB inhibitor (N-acetyl-L-cysteine, NAC) or phosphatidyl-inositol (PT) 3 kinase inhibitor (LY294002), but not by mitogen activated protein kinase (MAPK) inhibitor (SB203580). Neutralizing anti-IL-18 monoclonal antibody dose-dependently inhibited the production of TNF-α by monocyte-stimulated T cells. IL-18 failed to induce TNF-α production by cultured monocytes alone, while dose-dependently enhanced TNF-α production in monocyte-stimulated T cells, which could be inhibited by NAC or LY294002, but not by SB203580. Conclusion: By direct cellular contact T cells can stimulate monocytes to produce TNF-α and IL-18, up-regulate IL-18 receptor expression in monocytes, and activate intracellular NF-κB and PI3 kinase pathways. IL-18 can enhance T cell ability to stimulate TNF-α production by monocytes, which is dependent on the activation of NF-κB and PI3 kinase pathways.

Adult ; Female ; Humans ; Humeral Fractures ; complications ; Male ; Middle Aged ; Radiography ; Shoulder Dislocation ; diagnostic imaging ; etiology ; therapy

Objective To investigate the effect and mechanism of silencing ATP1A1 gene on invasion ability of human U251 glioma cells.Methods The human U251 glioma cells were infected with lentivirus expressing shRNA-ATP1A1.The mRNA and protein expression of ATP1A1 in U251 glioma cells was detected by RT-qPCR and Western blot,respectively.The proliferation of U251 glioma cells was determined by MTT assay.The migration and invasion ability were detected by cell scratch test and Transwell chamber.The protein expression of matrix metallo proteinase 2 (MMP-2) and MMP-9 in U251 glioma cells were detected by Western blot.Results The mRNA and protein expression of ATP1A1 in the silence group were significantly inhibited,The ability of proliferation, migration and invasion were also significantly inhibited (P<0.05),The expression of MMP-2 and MMP-9 were also significantly reduced,there was a significant difference(P<0.05).Conclusions RNA interference targeting ATP1A1 gene can significantly inhibit the proliferation, migration and invasion of glioma U251 cells.The mechanism might be related to the down-reguLation of MMP-9 and MMP-2.ATP1A1 can be used as a potential target for the treatment of glioma.

cases of coronary heart disease with the left main coronary artery (LM) Lesion (≥50% stenosis) were analyzed In 8 cases the LM Lesion was only involved,and in the others (43),the LM Lesions were accompanied by other branch lesions of coronary artery Compared with 210 cases of coronary heart disease without LM Lesions,in the LM Lesion groups,the patients clinically manifested severe unstable angina,and the incidences of acute myocardial infarction and sudden death were higher In the two groups of patients with and without LM Lesion The risk factor for coronary heart disease and left ventricular ejection fraction was unsignificantly different The clinical manifestations were similar in the two groups of patient with only LM Lesion and without LM Lesion But when angina onset myocardial ischemia is severe in the patients with only LM Lesion The coronary artery bypass graft may improve symptom and prognosis of patients with LM Lesion

Objective To evaluate the effectiveness and safety of a new designed balloon catheter, the Minirail balloon catheter in coronary intervention Methods Twenty two consecutive patients with coronary artery disease (male 16, female 6, mean age 58 77?8 69 years) were enrolled the study Selective angioplasty was performed for 24 target lesions (17 in LAD, 2 in LCX, and 5 in RCA) Among these target lesions were 5 type C, 14 type B 2, and 5 type B 1 lesions The average extent of narrowing before procedure was 91 18%?5 95% Target lesions were dilated with Minirail balloon catheters Results All of the target lesions were successfully dilated with Minirail balloon catheters The average residual stenosis was 33 18%?25 14% after balloon angioplasty Significant dissection was seen in 3 of the cases, and slow reflow in another one Twenty four stents were implanted in 19 cases The final residual stenosis was 1 82%?5 01% at the end of procedure No death or Q wave myocardial infarction happened No emergency bypass surgery needed Conclusion Minirail balloon catheter is safe, effective, and easy to be used in coronary intervention

Objective To evaluate the effect of obstructive jaundice on recovery from sevoflurane anesthesia in pediatric patients. Methods A total of 80 pediatric patients scheduled for elective surgery were included, 42 pediatric patients with biliary atresia scheduled for Kasai operation served as obstructive jaundice group ( group OJ ) , and 38 pediatric patients scheduled for other operations served as control group ( group C) . Pediatric patients were 1-4 months old and full?term infants, and weighed 3.2-8.0 kg. Anesthesia was maintained with inhalation of 2%-4% sevoflurane during surgery, and pediatric patients inhaled 4% sevoflurane staring from peritoneum closure until the end of surgery. The duration from closing sevoflurane vaporizer to BIS value reaching 60, 70, 80 and 90 was recorded. The duration from stop of sevoflurane inhalation to BIS value returning to 60, 70, 80 and 90 was recorded. The duration from termination of sevoflurane inhalation to the time for tidal volume returning to 6 ml∕kg, to the time for muscle strength recovering to grade Ⅲ, to spontaneous eye opening and to tracheal extubation, and the corresponding BIS values were recorded. BIS value while entering the operating room, BIS value at the end of surgery, and the highest BIS value during recovery from anesthesia were recorded. The occurrence of delayed emergence from anesthesia was recorded. Results Compared with group C, the duration from termination of sevoflurane inhalation to spontaneous eye opening and to tracheal extubation were significantly prolonged, and BIS value at the end of surgery was decreased, and no significant change was found in the other parameters in group OJ. No pediatric patients developed delayed emergence from anesthesia in the two groups. Conclusion When only sevoflurane is used for inhalation anesthesia, although the time for recovery from anesthesia is prolonged, it shows no significant difference clinically in pediatric patients with obstructive jaundice.

OBJECTIVE:To study the effects of different drying methods on the quality of North Qinglongyi,thus optimize the best drying way of North Qinglongyi. METHODS:North Qinglongyi was processed using five kinds of drying methods includ-ing drying in the shade,drying in the sun,oven drying,microwave drying,freeze drying and oven drying under different tempera-ture (40,50,60 ℃). The indicators were investigated,such as drying time,recovery rate of water,water content,alcohol ex-tract,content of active ingredients walnut quinone and juglone,in vitro anti-tumor activity of methanol extract to human gastric ade-nocarcinoma BGC823 cells and human lung cancer A549 cells. The effects of different drying methods on the quality of North Qinglongyi were analyzed comparatively. RESULTS:Among 5 kinds of drying method,microwave drying time was the shortest, and the time of drying in the shade was the longest;water content of sample with freeze drying was the highest,and that with mi-crowave drying was the lowest;the content of alcohol extract has little difference;the content of walnut quinone of sample with freeze drying was the highest,and that with microwave drying was the lowest;the content of juglone of sample dried at 40 ℃ was the highest,and that of freeze drying was the lowest;anti-tumor experiment in vitro showed that inhibition rate of sample with dif-ferent drying methods on the growth of 2 kinds of cells was in descending order of freeze drying>40 ℃ drying>drying in the shade,and the inhibition rate decreased with the increase of drying temperature. CONCLUSIONS:Different drying methods have obvious influence on the quality of North Qinglongyi. 40 ℃ drying method is the best for North Qinglongyi drying from the com-prehensive analysis including cost,the contents of effective composition,anti-tumor activity and practice.

Objective To investigate the MRI and pathological features of different molecular subtypes of breast cancer.Methods The data of 202 patients who underwent primary breast cancer resection were retrospectively reviewed.All of the patients had MRI preoperatively.The molecular subtypes of breast cancer defined by immunohistochemistry were classified as basal-like,luminal and HER-2 overexpression.Morphology (including mass or non-mass like enhancement,shape and margin of masses,unifocal or multifocal masses) and enhancement characteristics on MRI,histologic types and grades of tumors were analyzed with Chi-square test,exact test,Fisher exact test,Kruskal-Wallis H test,and Wilcoxon test.Results Among the 202 patients,34 were basal-like,144 were luminal and 24 were HER-2 overexpression.The number of mass cases in each subtype was 29,133 and 19 respectively,making no significant difference (x2 =4.136,P =0.126).As for the shape of basal-like lesions,8 were round,19 were lobular and 2 were irregular,while this distribution was 23,58,52 in luminal subtype and 1,11,7 in HER-2 overexpression subtype (x2 =13.391,P ＜ 0.05).The margin was also strikingly different among three groups (smooth,spiculated,irregular):20,5,4 respectively in basal-like,27,53,53 respectively in luminal,and 4,7,8 respectively in HER-2 overexpression (x2 =28.515,P ＜ 0.01).52.6％ (10/19) of HER-2 overexpression cases were multifocal,while only 6.9％ (2/29) of luminal and 8.0％ (24/133) of basal-like ones were multifocal (x2 =16.140,P ＜ 0.01).Characteristics in dynamic contrast-enhanced MRI were statistically different,with homogeneous,heterogeneous,and rim enhancement 0,13,16 respectively in basal-like cases,28,93,11 respectively in luminal cases and 2,11,6 respectively in HER-2 overexpression cases (P ＜ 0.01).However,the difference for enhancement curve did not reach significance (P =0.457).Histologic types were significantly different among molecular subtypes (P ＜ 0.01).Luminal breast cancer consisted of various histologic types,32.6％ (47/144) of which were mixed type.The majority of the other two molecular subtypes were invasive ductal carcinoma.Furthermore,invasive ductal carcinomas with different molecular subtypes showed different histologic grades (Hc =30.014,P ＜ 0.01).Basal-like breast cancer was more likely associated with a higher grade of malignancy.Conclusions Different molecular subtypes of breast showed distinct MRI features and pathologic characteristics.MRI might be a useful tool for preoperative prediction of molecular subtypes of breast cancer.