Objective By comparing the change of expression of AQP1 in vitro lung preserved by the continuous infusion of a heart‐lung machine ,continuous pressure perfusion and single low temperature ,to explore the best method of vitro lung preserva‐tion .Methods Thirty Mongrel dogs were randomly divided into 3 groups ,and both lungs were completely resected under the condi‐tion of keeping mechanical ventilation .The vitro lungs were preserved by the way of the continuous infusion of a heart‐lung ma‐chine ,continuous pressure perfusion and single low temperature ,and collecting specimens according to the time point .HE staining was used to observe the morphological changes of vitro lung tissue .Immunohistochemistry and Western blot were used to detect the expression of AQP1 in vitro lung .Results HE staining found that as the time went by alveolar structure gradually collapsed ,in‐flammatory cells increased ,alveolar interval also gradually broadened and exudation could be seen in the alveolar cavity ;at the same time point ,organization structure of extracorporeal circulation group changed lighter than pressure perfusion group and low‐temper‐ature preservation group .In each experimental group ,the expression of AQP1 showed a trend of decline;at each time point ,the ex‐pression of AQP1 in extracorporeal circulation group was higher than pressure perfusion group ,and pressure infusion group was higher than that of low‐temperature preservation group .Conclusion The protective effect of the continuous infusion of a heart‐lung machine on vitro lung was better than continuous pressure perfusion and single low temperature .

Currently, the resistance of first-line anti-tuberculosis drugs has made the prevention and treatment of tuberculosis increasingly difficult, posing a serious threat to global public health. Several studies have shown that efflux pumps are one of the important causes for bacteria to develop multi-drug resistance and extremely-drug resistance, and efflux pump inhibitors can inhibit the efflux of antibacterial drugs, thereby reducing bacterial drug resistance. Numerous natural products and synthetic compounds have been reported to possess efflux pump inhibitory activity, but they have not been applied in clinical settings because of their toxicity, pharmacokinetic properties, etc. Therefore, we summarized the efflux pump inhibitory activity, antimicrobial activity, and structure-activity relationships of reported efflux pump inhibitors against Mycobacterium tuberculosis in recent years, providing references for the development of new efflux pump inhibitors with better activity and lower toxicity.

Antineoplastic Agents, Phytogenic ; administration & dosage ; pharmacology ; Apoptosis ; drug effects ; Cell Line, Tumor ; Dose-Response Relationship, Drug ; Glioma ; pathology ; Humans ; Sesquiterpenes ; administration & dosage ; pharmacology ; Time Factors

To explore the measures of nursing management in the treatment of large number of infants with urinary calculi. The nursing management measures included launching the preparedness and response project for sudden public health events, formulating scientific and standardized nursing management system,optimizing work flow,strengthening nurse training,focusing on the details in nursing management,implementing disinfection and isolation system seriously,and paying close attention to health education for the parents of minority infants. Scientific nursing management can ensure the treatment effectiveness and nursing safety for the infants with urinary calculi.

Objective To study the screening value of color doppler flow imaging (CDFI) for gastroesophageal reflux(GER).Methods Through the window of left lobe liver, the abdominal esophageal length,the phenomenon of GER and the frequency of GER were detected by CDFI in 55 children with GER and 55 control group.Results Abdominal esophagus was identified by CDFI in every children. The abdominal esophageal length was shorter in refluxers than that in control group. A significant correlation was found between its length and the age of control group.To diagnose GER with CDFI ,its accuracy was 98.18%,and its specificity was 76.36%.Conclusions Visualization and measurements of the abdominal esophagus are readily achieved with CDFI in children.Abdominal esophageal length is shorter in refluxers than that in control group. CDFI is a rapid method of screening GER.

Objective To study whether gastric liquid emptying is delayed in children with gastroesophageal reflux and its clinical significance. Methods At different times after meal, the gastric antral diameters were measured by real - time ultrasonography in 55 children with gastroesophageal reflux and 55 controls. Results At 20 min,60 min after meal , there was a significant difference in gastric emptying rate between case groups and control groups, respectively(P

BACKGROUND: Traditional solid bone can not receive satisfied effects in repairing irregular bone defects in oral maxillofacial surgery due to uneven distribution of cells and growth factors. Therefore, it is a research direction to prepare injectable tissue engineering bone.OBJECTIVE: To explore the effects of chitosan/β-tricalcium phosphate/recombinant human bone morphogenetic protein-2(CS/β-TCP/rhBMP-2) composite on mandibular defect repair.DESIGN, TIME AND SETTING: A randomized controlled animal experiment. The experiment was performed atthe animal laboratory, Medical College of Jinnan University from May 2008 to March 2009.MATERIALS: The injectable tissue engineering bone was prepared by using complex of liquid CS and solid β-TCP as scaffold materials, and combined with freeze-dried rhBMP-2.METHODS: Twenty-four New Zealand white rabbits were prepared for double sides mandibular defect models, and randomized into 4 groups: ①CS/p-TCP/rhBMP-2 group: 1 mL CS/β-TCP/rhBMP-2 complex was injected into the defects.②CS/β-TCP group:0.5 mL CS/β-TCP complex was injected into defects. ③Autograft bone group: repairing the defects with sclerotin of the iliac crest.④Blank control group: no implantation. MAIN OUTCOME MEASURES: At weeks 2, 4 and 8 after surgery, the material degradation and new bone formation were evaluated with, haematoxylin-eosin staining, and electron microscope; the bone mineral density was detected by dual energy X-ray absorptiometry (DXA) to determine bone formation rate and quality.RESULTS: ①Gross observation demonstrated that the size and thickness of osteotylus in CS/β-TCP/rhBMP-2 group was equivalent with the autograft group, which were greater than that of the other groups.②Histologicalobservation demonstrated that there were more bone matrixes in the CS/β-TCP/rhBMP-2 group and autograft group than that in the CS/β-TCP group and blank control group at each time points. ③Scanning electron microscope image suggested that at 8 weeks after operation, the bone bed and the materials in CS/β-TCP/rhBMP-2 group were connected with bone, and the gap was diminished. The degradation of the materials was so obvious that the complete structure of materials could not be found. ⑤DXA detection appealed that the bone density of each group was gradually increased with time prolonged. The quantities of bone density in CS/β-TCP/rhBMP-2 group in weeks 2, 4 and 8 were significantly higher than CS/β-TCP group and blankcontrol group (P < 0.05).CONCLUSION: ①CS/β-TCP/rhBMP-2 has good biocompatibility, degradability and the capacity of bone guidance and bone induction. ②CS/β-TCP can be served as a promising carrier for BMP-2, which is a potential degradable biological material for repairing bone defects.

Objective:To investigate whether PDTC or curcumin had effect on anti-β2GPI-induced tissue factor (TF) expression in mice.Methods:BALB/c mice were pretreated with PDTC (100 mg/kg,once a day) by intraperitoneal injection (i.p.) or/and curcumin (50 mg/kg,once a day) by oral gavage for 3 consecutive days at 2 h before 500 μg of anti-β2GPI injections in subsequent experiments.Mouse peritoneal macrophages and aorta were collected,homogenized by sonication.The total RNA and protein were collected from each animal,TF expression was detected by Real-time quatitative PCR and TF activity kit.The phosphorylation of NF-κB p65 and c-Jun/AP-1 was determined by Western blot.Results:Anti-β2GPI cloud significantly upregulate TF expression and phosphorylation of NF-κB p65 and c-Jun/AP-1 in mouse peritoneal macrophages and aorta,compared with NR-IgG treated mice (P＜ 0.05).PDTC or/and curcumin could markedly attenuate anti-β2 GPI-induced TF expression,also inhibit activation of NF-κB p65 and cJun/AP-1 in the aorta and peritoneal macrophages respectively (P＜0.05),but combination of two inhibitors had no synergistic effect.Conclusion:Both PDTC and curcumin could affect the expression of TF induced by anti-β2GPI in mice,indicatiug that PDTC and curcumin has the potential to prevent thrombosis in APS.

Objective To investigate the role of mammalian target of rapamycin(mTOR) in the expression of tissue factor(TF) from THP-1 cells induced by β2GPI/anti-β2GPIcomplex.Methods The THP-1 cells were treated with both β2GPI/anti-β2GPI and β2GPI/IgG-APS(β2GPI/IgG from APS patients) complexes.Rapamycin(100 nmol/L),the mTOR inhibitor,was used to exert the intervention experiment.The total RNA and proteins of the THP-1 cells were collected for detection.The mRNA expression level and activity of TF in THP-1 cells were detected by real-time quatitative PCR(RT-qPCR) and TF activity kit respectively.western blotwas used to determine the levels of mTOR and phosphorylated-mTOR(p-mTOR),and p38,p-p38,ERK1/2,p-ERK1/2,JNK,p-JNK,NF-κB p65 and p-NF-κB p65 in THP-1 cells were determined simultaneously.Results Both β2GPI/anti-β2GPI and β2GPI/IgG-APS complexes chould significantly upregulate the mRNA expression and activity of TF,and the phosphorylation levels of mTOR in THP-1 cells(P ＜ 0.05).Rapamycin markedly attenuated the mRNA expression and activity of TF and mTOR phosphorylation induced by β2GPI/anti-β2GPI and β2GPI/IgG-APS complexes (P ＜ 0.05),and also inhibited the phosphorylation levels of p38,ERK1/2 and NF-κB p65 in THP-1 cells induced by β2GPI/anti-β2GPI and β2GPI/IgG-APS complexes (P ＜ 0.05),but did not showed effects on the phosphorylation of c-Jun NH2-terminal protein kinase (JNK) (P ＞ 0.05).Conclusion mTOR could be activated by β2GPI/antiβ2GPI complexes in THP-1 cells and play a crucial role for β2GPI/anti-β2GPI-induced TF expression in THP-1 cells.

AIM: To construct engineered E.coli strains which can express nattokinase with fibrinolysis activity using gene engineering technology. METHODS: The pro-nattokinase (pro-NK) gene was amplified by PCR and inserted into expression vector pET3c. The recombined plasmid pENK which expressed the fusion protein of pro-NK and 22 amino acid peptide was then transferred into lysogenic host strains BL21(DE3)pLysS - and BL21(DE3)pLysS +. Both SDS-PAGE and the fibrin plate assay were used to examine the expression and the activity of the target protein. RESULTS: SDS-PAGE assay showed the fused gene encoding 42 kD fusion protein was expressed in both expression strains pENK-(DE3)pLysS - and pENK-(DE3)pLysS +, and the fibrin plate assay indicated that the expression product had fibrinolysis activity. pENK-(DE3)pLysS - exhibited the basal expression of the target gene, while fusion protein was only induced by IPTG in pENK-(DE3)pLysS +. Basal expression of the fused toxic gene in pENK-(DE3)pLysS - led to bacteriolysis and hollow lawns. CONCLUSION: A pro-NK fusion protein with fibrinolysis activity is successfully expressed in E.coli , which lay a foundation for the exploitation of nattokinase.