Objective To investigate the effect of anti-CD81(antibodys against CD81) on the proliferation of astrocytes. Methods Purified astrocytes from newborn rats' cerebral cortex were divided into 6 groups and added with anti-CD81 different concentrations(0,0.1,0.5,1,5,10?mg/L).The activity of astrocytes was tested by methyl thiazolyl terazolium(MTT).Three significative groups were chosen based on MTT result and added with anti-CD81 of different concentrations(0,0.5,5mg/L).After administration for 24 hours,the cell cycle of the astrocytes was measured by flow cytometer.The corresponding data were analyzed with SPSS statistical software. Results 1.By MTT,the average optical density(AOD) values of astrocytes were reduced after administration with anti-CD81 of different concentrations for 24 hours,that is,the number of astrocytes was reduced,which indicated anti-CD81 inhibited the proliferation of astrocytes and the effect showed a dose-dependent pattern.2.By cell cycle analysis,a progressive dose-dependent decrease was found in the index of cells in G-0/G-1 phase and an increase in S phase.Such as,the index of cells in G-0/G-1 phase,was 82.73 in 0,is 82.16 in 0.5?mg/L,was 78.58 in 5?mg/L.Conclusion Anti-CD81 inhibits the proliferation of astrocytes and the number of astrocytes is reduced.Further more,the index of cells decreases in G-0/G-1 phase and increases in phase S after administration with anti-CD81.This study shows that anti-CD81 doesn't restrain the cells from G-1 phase to S phase but the cells are arrested in S phase.

Objective To investigate clinical manifestations and clinical diagnosis and treatment and pathological and immunohistochemical features in gastrointestinal stromal tumors. Methods The clinical data of fifty-two cases with gastrointestinal stromal tumors were collected, whose clinical diagnosis and treat-ment and pathological features were retrospectively analyzed from January 1995 to December 2007. Results All patients received operation therapy, only forty-five cases with complete surgical resection. The immu-nohistochemical staining showed that the cases with CD117 positive accounted for 100% (52/52) and CD34 positive accounted for 88.5% (46/52). Conclusions Surgery was necessary for all patients, especially complete surgical resection. Gastrointestinal stromal tumors were poor in preoperative diagnosis, which diag-nosis was based on the immunohistochemical staining of the tumor tissue. CD117 and CD34 tumor markers may help to diagnose gastrointestinal stromal tumors.

OBJECTIVE: To investigate the effect of yizhi jiannao granule concentration fluid (YCF) on the expression of peptidyl-prolyl-cis-trans isomerase A (Pin1) and high mobility group box 1 (HMGB1) mRNA in the hippocampus of senescence accelerated mice Senile-Prone8(SAMP8). METHODS: Six-month old SAMP8 mice were randomly divided into a YCF group and a model group. Six-month old SAMP8 mice were served as a normal control group. The YCF group was ravaged, while the model group and the normal control group were gavaged with double-distilled water for 8 weeks. The hippocampus was taken out for examination. The expression of Pin1 and HMGB1 mRNA was measured by RT-PCR. RESULTS: In the YCF group, the level of Pin1 mRNA increased, and the level of HMGB1 mRNA decreased compared with that of the model group. CONCLUSION Yizhi jiannao granules can prevent Alzheimer's disease by increasing the Pin1 level and decreasing the HMGB1 level.
Aging ; drug effects ; metabolism ; Alzheimer Disease ; metabolism ; Animals ; Drugs, Chinese Herbal ; pharmacology ; HMGB1 Protein ; genetics ; metabolism ; Hippocampus ; metabolism ; Male ; Mice ; NIMA-Interacting Peptidylprolyl Isomerase ; Peptidylprolyl Isomerase ; genetics ; metabolism ; RNA, Messenger ; genetics ; metabolism

Objective To study the expression of lipoic acid synthase(LIAS)in the liver and kidney of Leprdb/db mice with deficient leptin receptor. Methods Eight 10-week old male Leprdb/ +mice and Leprdb/dbmice were included in this study. The body weight of rats in the two groups was measured. Fasting blood glucose(FPG)was measured with blood glucose test strips for all mice after fasting for 8 hours. Blood samples were obtained from the abdominal aorta and the animals were sacrificed. The liver and kidney were weighed. The right lobe of liver and the left kidney samples were fixed in 4% paraformaldehyde for pathological examination. Serum samples were separated and the sereum contents of CHO, TG,HDL and LDL were detected. The mitochondria of liver and kidney tissues were extracted with a mitochondrial isolation kit, and the protein was extracted. The expression of LIAS protein was detected by western blot. Results Histopathological observation showed that the liver and kidney tissues of Leprdb/ +mice have intact and clear structure. But the liver tissue of Leprdb/dbmice showed fatty degeneration, the kidney tissue showed glomerular hypertrophy, basement membrane thickening, mesangial area widened, including mesangial cells and mesangial matrix increased. The GLU,CHO,TG,LDL and AST of Leprdb/dbmice were significantly increased compared with those of Leprdb/ +mice(P<0.05). Compared with Leprdb/ +mice,the LIAS protein expression was significantly increased in the liver and kidney mitochondria of Leprdb/dbmice(P<0.05). Conclusions There is impaired glucose and lipid metabolism in the Leprdb/dbmice which has defect leptin receptor,and the expression of LIAS protein in liver and kidney of the Leprdb/dbmice is higher than that of Leprdb/ +mice.

Objective To establish an efficient method of genotyping for Leprdb/ +mouse offsprings by TaqMan probe quantitative fluorescence PCR. Methods Genome DNA was extracted from tails of 228 Leprdb/ +mouse offsprings. PCR primers and TaqMan probes were designed according to the mutation sites of Lepr gene(rs1801133). Real time PCR assay was applied and SNP loci were typed with SDS software. The genotyping of 2-month old Leprdb/dbmice was validated by the phenotype and Hardy-Weinberg equilibrium test was performed. Results 228 samples were detected by the established TaqMan fluorescence quantitative PCR assay. 64 mice were of GG genotype, with a genotype frequency of 0.1929. 123 mice were of GT genotype, with a genotype frequency of 0.5395. 41 mice were of TT genotype, with a genotype frequency of 0.2807. Compared with the phenotype typing,the sensitivity of the TaqMan fluorescence quantitative PCR was 97.56% and the specificity was 99.47%. Conclusions TaqMan probe quantitative fluorescence PCR assay is a simple and efficient method,and can be used to detect the genotype of Leprdb/ +mouse offsprings.

Objective To explore cytotoxic secondary metabolites from a marine actinomycete Nocardiopsis sp .SCSIO 11492 .Methods Isolation and purification were carried out by column chromatography over silica gel ,Sephadex LH-20 ,and ODS structures of the isolates were identified mainly by NMR spectroscopic data .And cytotoxic bioassay was performed using MTT method .Results Five compounds were identified as 2′-deoxyadenosine (1) ,2′-deoxythymidine (2) ,2′-deoxyuidine (3) ,uridine (4) ,1-O-palmitoyl-3-d-galactosyl-sn-glycerol spongilipid (5) .Compound 5 exhibited weak cytotoxic activity with IC50 value of 10 .9 μmol/L .Conclusion Five compounds were obtained from a marine actinomycete Nocardiopsis sp .SCSIO 11492 .All five compounds were reported for the first time from this genus .Compound 5 could be the bioactive compound re-sponsible for the cytotoxic activity of Nocardiopsis sp .SCSIO 11492 .