CXCL12 and its receptor CXCR4 can express in breast cancer,and are regulated by several factors in the genesis and development of breast cancer. Lots of researches have proved that CXCL12 and CXCR4 can be used as new independent prognostic makers of breast cancer.Treatment targeted for CXCR4 can be seen as a new kind of combination therapy,which may provides patients a more ideal treatment.

Objective To investigate the present situation of use of the antipsychotic in schizophrenic inpatients,To find out factors of using the antipsychotic.Methods The prescriptions of schizophrenic inpatients was investigated in cross-sectional survey.Results The 47 remedy in 465 schizophrenic inpatients were investigated.The remedy of use of single antipsychotic had 175 patients(37.6%),the remedy of use of combined 2 kinds of antipsychotic had 262 patients(56.3%),the remedy of use of combination 3 kinds of drugs had 28 patients(6.0%),combined more than two drugs therapy was very common;Using rate and constituting rate of clozapine in prescription were No.1,non-classical antipsychotics was playing a leading role in the antipsychotic;Inpatients with public health services used non-classical antipsychotics more than inpatients of non-public health services.Conclusion Non-classical antipsychotics is replacing classical antipsychotics in curing schizophrenic.Paying way of patient influences the antipsychotic choice.

In order to investigate the effects of cis-UCA on cell -mediated immunity, we established a murine model of DTH response to DNP6OVA which is indicated by the increasing in the ear thickness of the mouse after resensitization, compared with those of the mouse injected with 200 g cis - UCA and trans -UCA intraperitoneally (i. p. ). The average of the increasing in ear thickness of each group was 9. 1 1. 13 10-2 mm (n=8, the number of ears) for the group administrated with cis-UCA; 17. 45 0. 88 10 - 2 mm (n= 8) for the group administrated with trans-UCA ; 16. 43 + 1. 83 10 - 2 mm(n= 7) for control group. It is suggested that there are immunosuppression of DTH response to DNP6OVA in mouse administrated with ets-UCA and no effecs of trans-UCA on this response.

Objective:To investigate the influence of concanavalin A(Con A) pretreatment on the development of the fulminant murine hepatitis induced by an adequate dose of Con A.Methods:An adequate dose of Con A(15 ?g/g.body.wt) was injected intravenously into C57BL/6 mice to provoke severe liver damage,an extensively-used murine hepatitis model.A low dose of Con A(3 ?g/g.body.wt) was administrated intravenously 12 h before injection with an adequate dose of Con A.Liver injury was evaluated by serum transaminase assay and H&E staining.Hepatic lymphocytes were analyzed by flow cytometry and the absolute amount of lymphocytes per liver was calculated.Results:Pretreatment with a low dose of Con A significantly inhibited Con A-induced liver injury.Both the percentage and the absolute number of liver CD3~+T cells in Con A-pretreated mice were lower than those of PBS-pretreated mice.The activation of liver CD3~+T cells in Con A-pretreated mice was also prominently inhibited.Conclusion:Con A pretreatment exerted the negative effect on the development of Con A-induced hepatitis,which may be result from the decreased recruitment of T cells into the liver.The underlying mechanisms are under investigation.

Objective To detect the expressions of CXCR4,Smoothened (Smo) and Patched (Ptch) in breast cancer,to analyze the clinical significance of the expression of CXCR4,and to evaluate the relationships among CXCR4,Smo and Ptch.Methods The expressions of CXCR4,Smo and Ptch from 121 cases of breast cancer specimens were detected by immunohistochemistry,and the results were analyzed.Results The positive expression rate of CXCR4 in breast cancer was 66.9％,which was positively associated with the lymph node metastasis (r =0.181,P =0.044).The positive expression rates of Smo and Ptch in breast cancer were respectively 58.9％ and 64.5％.The expressions of Smo and Ptch were positively associated with the expression of CXCR4 in breast cancer (r =0.189,P =0.036 ; r =0.230,P =0.010).Conclusion The expression of CXCR4 in breast cancer is associated with the lymph node metastasis,and it is positiviely associated with the expressions of Smo and Ptch.Patients with breast cancer who express both CXCR4 and Hedgehog signaling pathway may have a higher risk of recurrence.

Objective To establish a cell line with repressed expression of p53 by transfecting a plasmid construct expressing short hairpin RNA(shRNA)targeting p53 into human skin fibroblasts(HSFs),and to evaluate the effect of repression of p53 expression on the senescence in HSFs.Methods The eukaryotic expressing plasmid pGCsi-p53 containing shRNA targeting p53 gene was transfected into HSFs with lipofectamine.Subsequently,the cells were selected by G418,and resistant cell clones were chosen and expanded.Reverse transcription-PCR and real time fluorescence-based quanitative PCR were performed to determine the expression of p53 gene,and Western blot to detect the expression of p53 protein in HSFs.The senescence in HSFs was evaluated by SA β-gal staining,and cell proliferation by methyl thiazolyl tetrazolium(MTT)assay.Results A HSF clone with repressed expression of p53 was established successfully.The expressions of p53 mRNA and protein were downregulated in transfected HSFs compared with untransfected HSFs(0.09 ± 0.03 vs.0.32 ± 0.04,0.11 ± 0.04 vs.0.84 ± 0.05,both P ＜ 0.01).The percentage of senescent cells was 13.47％ ± 1.01％ in the transfected HSFs,significantly lower than that in untransfected HSFs(18.10％ ± 0.66％,P ＜ 0.05).As MTT assay showed,the proliferation was accelerated in transfected HSFs compared with untransfected HSFs(P ＜ 0.05).Conclusions The repression of p53 expression decelerates the senescence in HSFs,but promotes the proliferation of HSFs.

Gene disruption by homologous recombination is a powerfu l tool for investigating gene function in yeast. Since 1980’s, it has been deve loped a lot. PCR-mediated gene disruption technique makes the manipulation easi er and it can be used to precisely delete genes in yeast. Multi-gene disruption technique can delete several genes successively in the same yeast strain. After the completion of the yeast Saccharomyces cerevisiae genome sequencing, the gene disruption technique for systematic analysis meets the need of the functio nal genomics in yeast. It also enlighten the study on human functional genomics.

To investigate the effects of salvianolic acid B (SA-B) on extracellular signal-regulated kinase (ERK) signal transduction pathway activated by transforming growth factor-β1 (TGF-β1) in rat hepatic stellate cells (HSCs).

Objective To analyze differentially expressed genes between hilar and distal cholangiocarcinoma and to clarify the molecular mechanism of tumorigenesis. Methods Gene-expression profiles of 3 samples of hilar cholangiocarcinoma and 4 samples of distal cholangiocarcinoma were analyzed using oligo microarray containing 21 329 genes. The differentially expressed genes between the two groups were analyzed using the Significance Analysis of Microarrays (SAM) in order to get the specifically differentially expressed genes. The gene expression presence was verified by real-time PCR (RT-PCR). Results A total of 725 genes of cholangiocarcinoma was regulated significantly compared to normal bile duct. Of them, 244 genes were upregulated and 399 genes were downregualted in both groups; on the other hand, 82 gene expressions between hilar and distal cholangiocarcinoma had significant differences (ratio ≥ 2.0 or ≤ 0.5). The SAM analysis showed that 40 genes, including AREG, EPHA2, SPP1, PACE4, and so on, were identified as differentially regulated between the two groups (q=0). Conclusions These data are helpful for a better understanding of the tumorigenesis of cholangiocarcinoma and contribute to the development of diagnostic and therapeutic strategies. The gene expressions between hilar and distal cholangiocarcinoma are significantly different, which suggests that the two tumors have different molecular mechanisms of tumorigenesis.

Objective To evaluate the clinical effectiveness of bipolar radio frequency tightening elongated ACL and PCL under arthroscopy.Methods From July 2001 to September 2003, twenty-two patients (average age 28, 19～36 years old; 18 males and 4 females; 15 right knees and 7 left; 9 from sports injury, 7 from traffic accident and 6 by sprain injury) with symptomatic laxity and confirmed elongation with rupture of structure were operated with bipolar radio frequency thermal shrinkage under arthroscopy. The average duration till operation was 6 months from injure. After operation, the patients started functional rehabilitation with protection of unlimited knee orthosis for 12 weeks. Results Twenty cases were follow-up for 4 to 22 months with average of 6 months. Lysholm score from 35.9 preoperation increased to 88.5 postoperation. Most patients had significant improvement in stability and function of knee join(excellent in 12,good in 4 and fair in 2). Conclusion Bipolar radio frequency could be applied to tighten elongated cruciate ligament of continuous structure and avoid potential revision and reconstruction in some cases.