ve To assess the effect of propofol on hepatic ischemia-reperfusion (I/R) injury and the mechanism. Methods Sixty healthy rabbits of either sex, weighing 2.0-3.4 kg were randomly divided into three groups of twenty animals each: control group (C), propofol group (P) and etomidate group (E) . The rabbits were anesthetized with 3.0% pentobarbital 1.0 ml?kg-1 iv. Internal jugular artery was cannulated for continuous MAP monitoring and internal jugular vein was cannulated for intravenous fluid and drug administration. In group C normal saline was infused at a rate of 2 ml?kg? h-1; in group E etomidate 0.1 mg ? kg-1? h-1 and in group P propofol 20 mg? kg-1? h-1 was infused during the experiment until the end of surgery. Hepatic ischemia was produced by clamping hepatic hilum for 20 min and reperfusion was allowed for 30 min after release of the clamp before the animals were sacrificed. Blood samples were taken from internal jugular artery before hepatic ischemia immediately, 15 and 30 min after I/ R for determination of AST, ALT and SOD concentration. Liver tissue 0.5g was taken from right lobe and kept in liquid nitrogen for determination of MDA content and left lobe of the liver was taken for electron microscopic examination. Results The serum levels of AST and ALT increased after reperfusion in all three groups, but were significantly lower in group P than in group C and E. The serum SOD level decreased in all three groups after reperfusion, but the decrease in SOD was significantly less in group P than in group C and E. The MDA content of liver increased in all three groups after reperfusion but the increase in MDA was significantly less in group P than in group C and E. Electron microscopic examination revealed that mitochondria swelled obviously, the ridge disappeared, ribosome was disarranged and endoplasmic reticulum was expanded and vacuolated in group C and E; while in group P mitochondria only slightly swelled, the ridge was seen clearly, the arrangement of endoplasmic reticulum was trim and there was no exfoliated ribosome. Conclusions Propofol has protective effect in liver I/R.

ObjectiveTo investigate the expression of stem cell marker adenosine triphosphate (ATP)-binding cassette transporter 2 (ABCG2) in the tissue and side population (SP) of a cell line A431 of human cutaneous squamous cell carcinoma(SCC).MethodsSP cells were separated by flow cytometry from cultured A431 cells.Methyl thiazolyl tetrazolium(MTT) assay was used to evaluate the proliferative ability of,reverse transcription-PCR to determine the expression of ABCG2 in,SP and non-SP cells.Immunohistochemistry (MaxVision method) was carried out to detect the expression of ABCG2 protein in tissue specimens from 10 patients with SCC.ResultsSP cells existed in cultured A431 cells,and accounted for about 1.1％ of A431 cells.The SP cells had a stronger growth and colony-forming ability than non-SP cells did.The number of cell clones formed by SP cells and non-SP cells was 114.8 ± 4.95 and 44.5 ± 3.67,respectively,per well in a 24-well plate( t =27.92,P ＜ 0.01 ).The expression level of ABCG2 mRNA was significantly higher in SP cells than in non-SP cells(t =5.22,P＜ 0.01).There existed a small number of ABCG2 positive cells in SCC tissue,and ABCG2 was mainly expressed in the cytoplasm and membrane of tumor cells.ConclusionsSP cells exist in A431 cells,which have characteristics of stem cells and highly express ABCG2.ABCG2 may be a potential stem cell surface marker of SCC.

Cephalosporins are widely used antibiotics owing to their broad activity spectra and low toxicity. Many of these medically important compounds are made chemically from 7-aminodeacetoxycephalosporanic acid. At present, this intermediate is made by synthetic ring-expansion of the inexpensive penicillin G to form G-7-ADCA, followed by enzymatic removal of the side chain to obtain 7-ADCA. The chemical synthetic process is expensive, complicated and environmentally unfriendly. Environmentally compatible enzymatic process is favorable compared with chemical synthesis. In our previous research, metabolic engineered Escherichia coli strain (H7/PG15) was constructed and used as whole-cell biocatalyst for the production of G-7-ADC with penicillin G as substrate. The whole-cell biocatalysis was studied by single factor experiment, including the composition of substrates and the conversion conditions (OD600, pH, concentration of penicillin G, MOPS, glucose, time and FeSO4). After optimization, 15 mmol/L of G-7-ADCA was obtained. The process is convenient, efficient and economic. This work would facilitate the industrial manufacturing and further product research.
Anti-Bacterial Agents ; biosynthesis ; Biocatalysis ; Cephalosporins ; biosynthesis ; Escherichia coli ; metabolism ; Metabolic Engineering

Acupuncture Points ; Acupuncture, Ear ; Adult ; Dizziness ; therapy ; Headache ; therapy ; Humans ; Male ; Middle Aged ; Moxibustion ; Rhinitis, Allergic, Seasonal ; therapy

Adolescent ; Child ; Humans ; Male ; Neuroectodermal Tumors, Primitive, Peripheral ; pathology ; Sarcoma, Ewing ; pathology

Objective To observe the expression of SGK in decidua in patients with unexplained recurrent spontaneous abortion(URSA) and to investigate its role in the course of apoptosis.Methods The expression of SGK was detected by immunohistochemistry in decidua of URSA(abortion group,n =50) and normal first trimester pregnant women(control group,n =30).The apoptotic index was detected by TUNEL.Results Compared with the control group,the positive expression of SGK decreased significantly in the abortion group,and the difference was statistically significant(x2 =6.78,P ＜ 0.05).The average apoptotic index of the abortion group was (8.19 ± 3.58) ％,which was significantly higher than (2.87 ±1.07)％ of the control group(t =7.94,P＜0.05).Conclusion Intensive apoptosis,the decreasing positive expression rate of SGK in decidua cells may play critical roles in URSA.

Background The extraocular muscles (EOMs) Pulley is considered as the functional origins of the recti EOMs,it is determinants of ocular motility.Objective The structure of the connective tissue around EOMs in cat was studied,and the role of EOMs Pulley to ocular movement was investigated.Methods Five adult cats were involved.The gross anatomy of an orbit in each cat was observed.The other orbit was processed with paraffin imbedding and coronal serial sections.A murine monocolonal antibody to α-smooth muscle actin (α-SMA) was used to show smooth muscle,while Masson trichrome stain was used to show muscle and collagen,and Weigert stain to show elastin.Results An encircling ring of collagen circled EOM was thin and connected to the orbital layer of muscle fiber loosely.Less elastin fibers and little smooth muscle cells were embedded in the collagen ring and connective band.Collagen ring around medial rectus and the connective band between medial rectus and inferior rectus was not more significantly developed than other bands.Conclusions The connective tissue around EOMs in cat may be related to its function of ocular movement,which is not developed.

Objective To evaluae possible association between interleukin-1 beta (IL-1?) gene exon 5 polymorphism and childhood asthma.Methods The study was conducted in two different groups: asthmatic children(n=55) and healthy children(n=35). The IL-1? gene exon 5 polymorphism was genotyped by polymerase chain reaction-restriction fragment length polymorphism analysis (PCR-RFLP). Results Frequencies of CC,CT and TT genotypes were 92.7%,7.3%,0, and frequencies of C,T allele were 96.4%,3.6% in asthmatic group. However, frequencies of CC,CA and AA genotypes were 85.7%,14.3%,0, and frequencies of C,T allele were 92.9% ,7.1% in healthy group. There were no significant difference in distribution of genotypes and allele frequencies between two groups.Conclusion IL-1? gene exon 5 polymorphism may not be associated with childhood asthma.

Objective:To investigate the association between the apolipoprotein A5(APOA5) -1131T/C polymorphism and premature coronary heart disease in northern Chinese Han population. Methods: Using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and polyacrylamide gel electrophoresis (PAGE), we analyzed the genotype and allele distribution in 140 patients with premature coronary heart disease diagnosed by coronary angiography and 156 healthy controls. The levels of serum lipid profiles were also studied by biochemical methods. Results: The allele frequency of APOA5-1131T/C polymorphism in the premature coronary heart disease group was significantly higher (43.2% vs. 33.0%, P=0.011) than that in the control group. Compared with TT homozygotes, CC homozygotes exhibited a 2.809-fold (95% CI 1.331-5.927) increased risk of developing premature coronary heart disease. Logistic regression analysis found that this correlation was independent of sex, age, body mass index (BMI), smoking history as well as serum total cholesterol(TC), high density lipoprotein cholesterol (HDL-C) and low density lipoprotein cholesterol (LDL-C) levels; In premature coronary heart disease group, the triglyceride(TG) level in CC homozygotes was significantly higher than those in TC heterozygotes or TT homozygotes. Conclusion: The APOA5-1131T/C polymorphism has influence on serum TG level, and the APOA5-1131C allele is associated with the development of premature coronary heart disease in northern Chinese Han population.

This research is for the purpose of comparative analysis of the microbial flora structure in the chilled beef with no packing and cling film, which under the same terms of sale. It was used the V3 area fragment of 16S rDNA to carry on PCR-DGGE, Meanwhile used the 16S rDNA sequence to analysis the microbial flora structure of the two samples, according to the technology of clone .The research discovered that the flora structure displays a biggish difference; there was 6 OTU in the chilled beef with cling film, mainly was that Lactococcus(28%), Lactobacillus (26%), Carnobacterium(18%) and Brochothrix (10%); but there was 18 OTU in the chilled beef with no packing, mainly was that Lactococcus(28%), Brchothrix(18%), Acinetobacter (11%). The result indicates that cling film played a certain inhibitory action regarding the Staphylococcus as well as the cold pole bacteria and such bacterium. And it can provide a certain theory ba-sis for the meat processing in the department of microorganism’s control.