Nuclear receptors,the superfamily of ligand-activated transcription factors,play crucial role in the regulation of gene expression of the lipid metabolism,and are involved in many metabolic diseases,such as cholesterol gallstone disease.Recently many domestic and foreign researches on the role of nuclear receptors in the lipid metabolism,help to further elucidate the biomolecular pathogenesis of cholesterol gallstone disease and other diseases associated with the lipid metabolism.

In order to identify host factors which interact with the movement protein (MP) of Apple chlorotic leaf spot virus (ACLSV), ACLSV MP was cloned into the bait vector pGBKT7 and used to screen a cDNA library of Malus sylvestris cv. R12740-7A, which had previously been constructed by yeast two-hybrid sequencing transformation. The protein functions of the identified host factors were determined according to their gene annotations in GenBank. The result showed that the bait plasmid pGBKT7-MP showed no virulence or self-activating effect on yeast strain Y2H Gold. Sixty-nine interactor proteins were identified, which were divided into the following 10 classes according to their described functions: hydrolases; pathogenesis-related proteins; DNA binding proteins; phosphatases; ligases; proteins with catalytic activity; phenylalanine ammonialyases; peroxidases; NAD binding proteins; and proteins of unknown function. Bioinformatic analysis of gene homology suggested that phosphatases, pathogenesis-related proteins and glyceraldehyde-3-phosphate dehydrogenase A may play an important role in the interaction between virus and host. This study may provide a theoretical basis for the further study of viral pathogenesis and virus-host interaction mechanisms.
Flexiviridae ; genetics ; metabolism ; Malus ; genetics ; metabolism ; virology ; Molecular Sequence Data ; Plant Diseases ; genetics ; virology ; Plant Proteins ; genetics ; metabolism ; Plant Viral Movement Proteins ; genetics ; metabolism ; Protein Binding ; Two-Hybrid System Techniques

AIM: The purpose of the present study was to detect intracellular Ca 2+ changes in living brain slices during focal cerebral ischemia/reperfusion (I/R) and reveal the role of intracellular Ca 2+ in the cerebral I/R injury. METHODS: The model of focal cerebral I/R was established in rats by reversible inserting a nylon thread, and dynamic change of intracellular Ca 2+ in brain slices was determined using laser confocal imaging system. RESULTS: ① Ca 2+ gradually enhanced with increase in ischemic time in cortex and striatum. ②At 1 h ischemia/ 10 min reperfusion, Ca 2+ increased significantly in striatum, but Ca 2+ decreased at 3 h reperfusion compared with 10 min reperfusion. ③ Ca 2+ markedly enhanced at 6 h ischemia compared with 1 h ischemia, and after 3 h reperfusion Ca 2+ decreased, but was still higher than that in sham-operation group. ④The striatum is more sensitive than cortex to ischemia/reperfusion. CONCLUSION: Ca 2+ overload in the area of cortex and striatum may play an important role in cerebral ischemia/reperfusion injury in rats.

Objective To investigate the anticancer effects and detailed mechanisms of Saikosaponin D (SSD) in human hepatoma HepG2 cells. Methods Cell proliferation and apoptosis were tested by MTT assay and Annexin-V/PI assay respectively. The expressions of CCAAT enhancer binding protein β(C/EBPβ) and p53 were detected by RT-PCR and Western blotting. Results SSD inhibited cell proliferation in a dose-dependent manner and induced apoptosis at the concentration of 5.0mg/L. SSD significantly increased the mRNA and protein levels of C/EBPβ and p53 in a dose-dependent manner. Conclusion SSD exerts its anticancer effect by inhibiting cell proliferation and inducing apoptosis partly through C/EBPβ-p53 signal pathway in HepG2 cells.

Objective To explore the advantages and disadvantages between the RapidArc plans and fixed-field IMRT plan (IMRT).Methods Ten cases of cervical cancer,aged 55 (36-70),who were to receive post-operative radiotherapy were selected randomly.Single arc (Arc 1),two arcs (Arc 2),and three arc (Arc 3) RapidArc plans and fixed-field IMRT plan were designed respectively in the Eclipse 8.6 planning system.The designing,treatment time,target area,and dose distribution of organs at risk by these 4 planning techniques were compared.Results The values of average planned treatment time by the Arc 1,Arc 2,and Arc 3 ten cases was 98,155,185,and 46 min,respectively.The values of average treatment time in the Varian IX accelerator were 2.15,3.32,4.48,and 6.95 min,respectively.The average mean doses were (48.99±1.08),(49.40±0.51) ,(49.51±0.62) ,and (48.65±0.92) Gy,respectively.The values of homogeneity index (HI) of target were 1.11±0.07,1.07±0.02,1.06±0.02,and 1.12±0.05,respectively.The values of eonformal index (CI) of target were 0.73±0.13,0.87±0.06,0.87±0.06,and 0.79±0.06,respectively.The doses at rectum,bladder,and small intestine calculated by IMRT plan were the lowest,and the doses at the femoral neck calculated by these 4 plans were similar.Conclusions The RapidArc plan is superior in dose distribution at target,HI,CI,and treatment time to IMRT,but IMRT plan is superior to RapidArc in planned dose calculation time and protection of organs at risk.However,in general,the RapidArc plan is better in clinical application than IMRT plan.

ObjectiveTo investigate the distribution and expression of y-secretase subunit (APH-1)in the central nervous system (CNS) of APP/PS1 double transgenic Alzheimer's disease (AD) adult mouse model,and to detect the expression difference of APH-1 in developmental brain between AD model mouse and wild-type littermates in order to further clarify the relationship between APH-1 and AD. MethodsOffspring bred by APP/PS1 double transgenic AD mice were genotyped.Immunohistochemical staining was used to detect APH-1 distribution and expression in the CNS of adult APP/PS1 double transgenic AD mouse model,in the brain of AD model mouse and its wild-type littermates on postnatal day 1,7,21 and 120.Results APH-1 was widely expressed in almost all regions of the CNS,especially in the cerebral cortex,hippocampus,olfactory bulb,hypothalamus,ventral striatum,caudate putamen,raphe magnus nucleus,cerebellum,brainstem and spinal cord of the adult APP/PS1 double transgenic mice.APH-1 expression was higher in the cortex of both AD and wild type mouse on postnatal day 1 than on postnatal day 7 and 21 with increased level of APH-1 protein in adult mouse brain.APH-1 expression in the brain of AD mice was higher than in its wild type littermates at any stage(P＜0.05).Conclusions Distribution of APH-1 is ubiquitous and region-dependent in the CNS.The different distribution and expression between APP/PS1 double transgenic mouse model and its wild type littermate indicate that APH-1 may be related to AD.

Objective To detect the expression of SSX and to correlate it with clinical indicators of primary hepatocellular carcinoma (HCC).Methods The expression of SSX1-5 mRNA and SSX1 protein were respectively detected by RT-PCR and Western blot and immunohistochemistry staining.The relation between the expression of SSX mRNA and SSX1 protein with clinical indicators were analysed.Results SSX1,SSX2,and SSX3 mRNA were expressed in hepatocellular carcinoma cell lines BEL-7404,Hep G2,and SMMC-7721.In 26 HCC samples,SSX1-SSX5 mRNA was detectable in 53.8％,42.3％,50.0％,46.2％ and 26.9％.The expression of SSX1 mRNA was not related to serum AFP levels (P ＞0.05).Specific expression was both found in the normal group and the high value group.The expression rate of SSX1 mRNA was 85.7％ in the older group,which was higher than in the younger group (16.7％,P ＜ 0.05).The expression rate of SSX1 protein was 50％ in HCC tissues,which was not seen in the caner-adjacent or cirrhosis tissues.In 49 HCC paraffin tissue section samples,the expression rate of SSX1 protein was higher than that in caner-adjacent tissues (46.9％ vs 18.4％,P ＜ 0.05).The expression rate of SSX1 protein was 68.3％ in the large hepatocellular carcinoma group,which was higher than in the small hepatocellular carcinoma group (29.6％),(P ＜ 0.05).Conclusions SSX1 mRNA is expressed with a high percentage and specificity in HCC and their products are new potential promising targets for antigen-specific immunotherapy of HCC.The detection of SSX1 expression has the potential value for auxiliary diagnosis of HCC.

Objective To investigate the access to online health information in community residents.Methods The online health information behaviors in residents of 10 communities in Baiyun District, Guangzhou, China, were in-vestigated with questionnaires and analyzed by SPSS 19 .0 .Results Of the community residents included in this in-vestigation, 25%were positive in access to online health information on general gate website and commercial health information service website, 74.34%showed their concern for food safety information, 52.30%focused their con-cern on disease symptom information, and 66.79%were unable to differentiate true information from false informa-tion.Conclusion The community residents have a low positivity and lack of awareness in access to online health in-formation.It is thus pressingly necessary to build the government-dominated online health information platform, and improve the commercial network model and the ability of community residents to differentiate true information from false information.

AIM To study the effects of degreasing-frosting on reducing toxicity and enhancing efficacy of Periplaneta americana L..METHODS The 95％ ethanol extracts from P.americana raw powder and processed products were extracted by petroleum ether,ethyl acetate,n-butanol and water.TLC was applied to comparing the component changes in various fractions.GC-MS was used for analyzing the kinds and contents of liposoluble constituents before and after processing.Shaking flask method combined with UV spectrophotometry method was adopted in the determination of Papp values in octanol-water and different pH values (2.23,3.28,4.22,5.23,6.12,7.24,8.23,9.10,10.15 and pure water) of buffer solutions.RESULTS After the petroleum ether fraction was processed,the colors of TLC spots became much shallower,which changed more significantly with the prolonging of processing time and increase of pressure.The TLC spots in the n-butanol and water fractions were clear without obvious changes.And no TLC spots were found in the ethyl acetate fraction.The kinds of liposoluble constituents were the same before and after processing,whose absolute contents were decreased after processing.Compared with raw powder,the Papp values of minor polypeptides in various processed products at different pH values exhibited significant differences (P ＜0.05,P ＜0.01),which also showed certain differences at the same pH values.CONCLUSION Degreasing-frosting can affect the contents of liposoluble constituents in P.americana and Papp values of minor polypeptides,which may be the mechanism of reducing toxicity and enhancing efficacy.

Objectives To evaluate the efficacy and safety of single-incision versus conventional laparoscopic cholecystectomy.Methods We searched electronic databases (PubMed,EMBASE,Cochrane Library,Chinese Biomedicine databases) from January 2000 to April 2012.Personal contact with experts in the field of laparoscopic cholecystectomy was performed to identify further potentially relevant clinical trials.Randomized controlled trials conducted on single-incision versus conventional laparoscopic cholecystectomy were analysed to compare conversion rates,blood loss,operation time,postoperative complications,wound satisfaction score,postoperative pain score and postoperative duration of hospitalization.Data were extracted by two reviewers independently.Statistical analysis was performed by using the RevMan 5.1 software.Results Twelve studies involving 915 patients met the inclusion criteria.When compared with conventional laparoscopic cholecystectomy (LC),the singleincision laparoscopic cholecystectomy (SILC) group showed no significant difference in conversion rate (OR=0.70,95％CI: 0.13～3.77,P=0.68),postoperative complications (OR=1.13,95％CI:0.72～1.78,P＝0.59) and postoperative pain scores (WMD＝-0.18,95％CI:-0.78～-0.43,P=0.57) . There was a significant increase in operative blood loss (WMD ＝ 1.43,95 ％ CI: 0.09 ～2.78,P＜0.05),increase in operative time (WMD=16.79,95％CI: 9.05～24.52,P＜0.01),but an increase in wound satisfaction score (WMD=1.28,95％CI..1.09～1.47,P＜0.01).The postoperative duration of hospitalization was significantly shorter (WMD =-0.30,95％ CI:-0.58 ～-0.02,P＜0.05).Conclusions Current evidence suggests that there is no significant difference in conversion rate or postoperative complications between SILC and LC.Although SILC requires a longer operative time and there is more blood loss when compared with LC,the SILC is superior in wound satisfaction score and in duration of hospitalization.