Objective To investigate the pathological significance of DEK-AP-2α interaction in HER2 overexpres-sion and breast tumorigenesis. Methods The protein level of DEK,AP-2α and HER-2 in breast tumor tissues was detected by Western blot. The interaction of DEK and AP-2α in MDA-MB-453 mammary cancer cells was detected by immuno-coprecipitation. Furthermore the impact of DEK and AP-2α on HER2 expression was investigated by siRNA in MDA-MB-453 mammary cancer cells followed by semi-quantitive RT-PCR and Western blot. Results A correlation between DEK, AP-2α and HER2 levels in breast cancer tissues were found. The interaction between DEK and AP-2α in MDA-MB-453 cells was verified by co-immunoprecipitation assay. Depletion of DEK and AP-2α in MDA-MB-453 cell by siRNA cooperatively repressed HER2 expression at both the mRNA and protein levels. Conclusion Oncogene DEK has synergestic effect with AP-2α transcriptional factor to promote HER2 overexpres-sion in breast cancer.

Objective To analyze the correlation between the positive rate of autoantibody and hepatitis C virus load and the relationship between the positive incidence and the status of liver function in patients infected HCV.Methods 168 patients infected hepatitis C virus were included,to detect serum autoantibody,HCV loads and liver function file.And 129 healthy controls were collected to test the serum autoantibody.Using the Chi-square test to analyze the count data,and performing student test or Nonparametric test to study measurement data,compared the positive rate of autoantibody in patients with HCV and that in healthy controls.Analyzed the correlation among the positive incidence of autoantibody,HCV load and the status of liver function in patients infected HCV,and studied the relationship of the positive rate of autoantibody with age and also with gender of the patients.Results The positive rate of autoantibody in patients with HCV was 35.12%(59/168),in which ANA accounted for 33.93%,SMA took up 2.98%,AMA-M2 made up 1.80% and anti-LKM1 1.20%.No patient existed LC-1 or SLA/LP in his/her serum.The total positive rate of autoantibody and ANA both were higher in pa-tients than in healthy controls (χ2=23.179,P=0.000;χ2=21.360,P=0.000).There existed no significant difference in the levels of HCV load,total bilirubin (TBil),ALT and AST between the patients whose autoantibody examinations were positive and those who were negative in autoantibody test (χ2=0.113,P=0.945;Z=-1.087,P=0.277;Z=-1.356,P=0.175;Z=-0.153,P=0.878).The positive rate of autoantibody not correlated with the gender (χ2=2.897,P=0.089), but related to the age (t=3.274,P=0.001)of the patients.There existed significant difference in the levels of ALT,AST and the age between the patients HCV RNA negative and those HCV RNA positive (Z=-6.430,P=0.000;Z=-6.123, P=0.000;t=-3.152,P=0.002),and the patients whose HCV RNA were negative younger than those who with HCV RNA positive (44.17 vs 55.27 years).Conclusion It is easy for autoimmunity to occur on persons infected HCV.The posi-tive rate of autoantibody is related to patients’age,but not to the HCV amount in patients.Besides,it cannot predict the sta-tus of the patients’liver injury that weather the autoimmunity appears.But HCV load correlated with patients'age and liver inj ury,which older group patients bring higher virus load and had more serious liver damage.