title: Overexpression of fucosyltransferase IV in A431 cell line increases cell proliferation.
abstract: Fucosyltransferase IV is an essential enzyme that catalyzes the synthesis of fucosylated oligosaccharides by transferring GDP-fucose to the terminal N-acetylglucosamine with the alpha1,3-linkage. Lewis Y oligosaccharide has a terminal alpha1,3-linked fucose residue and elevation of Lewis Y level is seen in many epithelial cancers. The mechanism of Lewis Y elevation in neoplastic cells is still largely unknown. To study the impact of fucosyltransferase IV on Lewis Y expression and its role on neoplastic cell proliferation, a pEGFP-N1-FUT4 recombinant plasmid was developed and stably transfected into A431 cells. We found that fucosyltransferase IV overexpression promoted cell proliferation and increased the expression of proliferating cell nuclear antigen that correlated with Lewis Y augmentation. Cell cycle analysis demonstrated that fucosyltransferase IV overexpression facilitated cell cycle progression. In conclusion, fucosyltransferase IV overexpression augments Lewis Y expression to trigger neoplastic cell proliferation. These studies suggest that fucosyltransferase IV may serve as a potential therapeutic target for the treatment of Lewis Y-positive epithelial cancers.
authors.affiliation: Department of Biochemistry and Molecular Biology, Dalian Medical University, Liaoning Provincial Core Lab of Glycobiology and Glycoengineering, Dalian 116027, PR China.
authors.forename: Xuesong
authors.initials: X
authors.lastname: Yang
authors.forename: Zhenbo
authors.initials: Z
authors.lastname: Zhang
authors.forename: Shuang
authors.initials: S
authors.lastname: Jia
authors.forename: Yuejian
authors.initials: Y
authors.lastname: Liu
authors.forename: Xiaoqi
authors.initials: X
authors.lastname: Wang
authors.forename: Qiu
authors.initials: Q
authors.lastname: Yan
mesh_terms: D002453:Cell Cycle; D045744:Cell Line, Tumor; D049109:Cell Proliferation; D018076:DNA, Complementary; D005647:Fucosyltransferases / Q000235:genetics* / Q000378:metabolism*; D015870:Gene Expression; D015971:Gene Expression Regulation, Enzymologic; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D007983:Lewis Blood Group Antigens / Q000096:biosynthesis; D016256:Lewis X Antigen; D018809:Proliferating Cell Nuclear Antigen / Q000378:metabolism; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D014162:Transfection
chemical_list: D018076:DNA, Complementary; D007983:Lewis Blood Group Antigens; D016256:Lewis X Antigen; C094162:Lewis Y antigen; D018809:Proliferating Cell Nuclear Antigen; D012333:RNA, Messenger; C066693:FUT4 protein, human; D005647:Fucosyltransferases