BAI Xiu-juan,ZHANG Xu-qing.Role of MHC class Ⅱ transactivator in upregulating the expression of HLA class Ⅱ antigen in HepG2 cells[J].J Amry Med Univ (J Third Mil Med Univ),2007,29(21):2019-2022.
BAI Xiu-juan,ZHANG Xu-qing.Role of MHC class Ⅱ transactivator in upregulating the expression of HLA class Ⅱ antigen in HepG2 cells[J].J Amry Med Univ (J Third Mil Med Univ),2007,29(21):2019-2022.DOI:
Objective To investigate the role of MHC class Ⅱ transactivator (CⅡTA) in upregulating the expression of HLA class Ⅱ antigen in HepG2 cells. Methods Eukaryotic expression vector EBS-NPL-CⅡTA containing CⅡTA cDNA or the empty vector EBS-NPL was transfected into HepG2 cells respectively. CⅡTA mRNA and HLA class Ⅱ antigen (HLA-DR
DP
DQ) were respectively detected by RT-PCR
indirect cell immunofluorescence technique and flow cytometry in original HepG2 cells
HepG2 cells transfected with EBS-NPL-CⅡTA or the empty vector EBS-NPL. Results The expression of CⅡTA mRNA and HLA class Ⅱ antigen (HLA-DR
DP
DQ) were not observed in original HepG2 cells and HepG2 cells transfected with empty vector
but in the HepG2 cells transfected with EBS-NPL-CⅡTA. Conclusion CⅡTA is a switching factor of mastering the expression of HLA class Ⅱ antigen in HepG2 cells. The lack of CⅡTA expression in HepG2 cells contributes to no expression of HLAⅡ antigen.