Loss of epithelial characteristics and acquisition of a mesenchymal phenotype are the main features of epithelial-mesenchymal transition (EMT). EMT plays an important role in tumor invasion and metastasis through increasing cell migration, invasion and anti-apoptotic capacity. Several mechanisms involved in EMT regulate invasion and metastasis of pancreatic cancer,including cadherin switch, growth factors, transcription factors, microRNA and signaling pathways.

Objective T o explore the num ber of necrophagous flies and seasonal distribution of com m on necrophagous flies at present in B eijing. Methods T he specim ens of necrophagous flies w ere collected by the m ethods of anim al carcass, trapping and feeding. A nd the specim ens w ere observed and counted after the classification and preservation. Results T he necrophagous flies in B eijing belonged to 4 fam i-lies, 9 subfam ilies, 21 genera and 46 species, and 12 species of them w ere the first records in B eijing. T he necrophagous flies had the characteristics of regional and seasonal distribution. Conclusion T he data of seasonal distribution of necrophagous flies and com m on necrophagous flies in B eijing can provide refer-ence for related research.

To investigate the level of serum IL-10 in allergic rhinitis patients and the correlation between IL-10 and serum total IgE (TIgE). 50 allergic rhinitis patients and 30 normal subjects were involved in the study. The levels of serum IL-10 and TIgE were measured by enzyme-linked immunosorbent assay (ELISA), and the correlation between serum IL-10 and TIgE was analyzed. In the allergic rhinitis group, the levels of serum IL-10 and TIgE were 8.34 +/- 2.48 pg/mL and 142.6 +/- 28.2 KU(A)/L. In the normal control group, they were 12.86 +/- 2.88 pg/mL and 47.2 +/- 12.2 KU(A). There were significant differences between the two groups (P < 0.01); and the level of serum TIgE in the patients was negatively correlated with that of IL-10 (r = -0.46, P = 0.02). The level of serum IL-10 was significantly decreased in allergic rhinitis patients, which was beneficial to the synthesization of IgE. IL-10 plays an important role in the episode of allergic rhinitis.
Enzyme-Linked Immunosorbent Assay ; Immunoglobulin E/*blood ; Interleukin-10/*blood ; Rhinitis, Allergic, Perennial/*blood

OBJECTIVE:To establish a HPLC method for the determination of aristolochic acidⅠand aristolochic acid Ⅱin human serum.METHODS:The separation was performed on C 18 column(250mm?4.6mm,5?m).The mobile phase consisted of methanol-water-acetic(72∶27∶1)at a flow rate of1.0ml/min.The detection wavelength was250nm.RESULTS:The linear ranges for aristolochic acidⅠand aristolochic acid Ⅱ were0.84～13.50?g/ml(r=0.9997,n=5)and2.03～32.50?g/ml(r=0.9994,n=5),respectively.The lowest determination concentration of aristolochic acid Ⅰ and aristolochic acid Ⅱ were0.3?g/ml and0.1?g/ml,respectively.CONCLUSION:The method is simple and practicable,and it can provide basis for clinical diagnosis and treatment of aristolochic acid nephropathy.

OBJECTIVE:To establish a method for quick content determination of clobetasol propionate in temeifu pigmentum.METHODS:UV spectrophotometry was used,and the determination was performed at the wavelength of 240nm.RES-ULTS:The detectable concentration of clobetasol propionate have a good linear relationship with its absorbability in the range of 12～18?g/ml.The inter-day and intra-day average recoveries were 99.87%(RSD=1.21%) and 99.79%(RSD=1.01%),respectively.CONCLUSIONS:The present method is rapid and accurate,which can be widely used in small hospitals not equipped with high performance liquid chromatography.

Objective To assess the efficacy of emergency hand-assisted laparoscopic hepatectomy for spontaneous rupture of primary hepatocellular carcinoma.Methods A total of 15 eases who underwent emergency hand-assisted laparoscopic hepatectomy for spontaneous rupture of primary hepatocellular carcinoma were retrospectively reviewed.Results All operations were successful.The postoperative mortality rate was.Thirteen cases were followed-up from 11 months to 56 months.The overall 1-,3-year survival rate was 84.6%(11/13),53.8%(7/13)respectively.Conclusion Emergency hand-assisted laparoscopic hepatectomy is a safe and feasible approach for pontaneous rupture of primary hepatocellular carcinoma in clinically selected patients.If the patients condition permits it,emergency hand-assisted laparoscopic hepatectomy should be the treatment of choice.

f fibrosis-related factors in LX-2cells were significantly increased after co-cultured with QSG7701-HBx cells, which proved that HBx could induce fibrogenesis in vitro.

Progression of tumor is a complex process with multiple steps and multiple factors.MicroRNA-296 (miR-296) plays an important role in tumor progression,involved in the proliferation,differentiation,angiogenesis,invasion,metastasis,apoptosis and drug resistance of the tumor cells.

OBJECTIVE To characterize clinical feature,frequency of isolation and antimicrobial susceptibility of bacterial pathogens isolated from patients with healthcare-associated bacterial meningitis(HABM).METHODS We review the charts of all patients in whom the diagnosis was based on(national) diagnostic criteria of healthcare-(associated) infections at Huashan Hospital from 1995 through 2004.The pathogens were routinely isolated,(identified) and susceptibilities against antimicrobial agents were determined by Kirby-Bauer methods.RESULTS During the 10-year study period,109 patients were treated for 120 episodes of HABM.Most of patients had a(history) of recent and remote neurosurgery.Fever was present in all patients,while nuchal rigidity and decrease consciousness were present in less than half of all patients.CSF opening(pressure,) white blood cell count and(protein) were elevated with predominance of neutrophils.A total of 120 strains were isolated from CSF specimen,Gram-positive bacteria and Gram-negative bacilli were accounted for 35.8% and(64.2%) of all isolates,respectively.Acinetobacter spp(24.2%),coagulase-negative staphylococci(22.5%),Klebsiella pneumoniae(12.5%),Pseudomonas aeruginosa(10%),Enterobacter cloacae(8.3%) and Staphylococcus aureas(7.5%) were the 6 most frequent isolates and resistance to the first line antibiotics was common among all pathogens isolated.(CONCLUSIONS) The most common risk factor for HABM is neurosurgery.Gram-negative bacilli and staphylococci are important causes of HABM,resistance to the first line antibiotics is common among all pathogens isolated.

20 antimicrobial agents were determined by Kirby-Bauer methods by the participating institutions.RESULTS A total of 428 strains were isolated,Gram-positive cocci and Gram-negative bacilli accounted for 49.8% and 50.2%,respectively.The Gram-positive bacteria increased from 44.6% to 51.2% from 1995-1996 through 2003-2004 and Gram negative bacteria decreased from 55.4% to 48.2% in the meantime.The most frequent Gram-positive isolates were coagulase negative staphylococci,Staphylococcus aureus,Enterococcus spp and Streptococcus pneumoniae;the most frequent Gram-negative isolates were Acinetobacter spp,Klebsiella spp,Escherichia coli,Pseudomonas aeruginosa and Enterobacter spp;Neisseria meningitidis,Haemophilus influenzae,Flavobacterium spp and Citrobacter spp were relative less common.No strains resistant to vancomycin were found in staphylococci and enterococci.Gram-negative bacilli were highly susceptible to carbapenem.CONCLUSIONS Gram-positive cocci play an increasing role in central nervous sysytem infections,especilly coagulase negative staphylococci,and Gram-positive cocci have been increasing from 1995-1996 through 2003-2004,resistance to the first line antibiotics is common among all cerebrospinal fluids isolates.