title: β3GnT8 Promotes Gastric Cancer Invasion by Regulating the Glycosylation of CD147.
abstract: β1, 3-N-acetylglucosminyltransferase 8(β3GnT8) synthesizes a unique cabohydrate structure known as polylactosamine, and plays a vital role in progression of various human cancer types. However, its involvement in gastric cancer remains unclear. In this study, we analyzed the expression and clinical significance of β3GnT8 by Western blot in 6 paired fresh gastric cancer tissues, noncancerous tissues and immunohistochemistry on 110 paraffin-embedded slices. β3GnT8 was found to be over-expressed in gastric cancer tissues, which correlated with lymph node metastasis and TNM stage. Forced the expression of β3GnT8 promoted migration and invasion of gastric cancer cells, whereas β3GnT8 knockdown led to the opposite results. Further studies showed that the regulated β3GnT8 could convert the heterogeneous N-glycosylated forms of CD147 and change the polylactosamine structures carried on CD147. In addition, our data suggested the annexin A2 (ANXA2) to be an essential interaction partner of β3GnT8 during the process of CD147 glycosylation. Collectively, these results provide a novel molecular mechanism for β3GnT8 in promotion of gastric cancer invasion and metastasis. Targeting β3GnT8 could serve as a new strategy for future gastric cancer therapy.
authors.affiliation: Department of Clinical Oncology, Taihe Hospital, Hubei University of Medicine, Shiyan 442000, Hubei, China; Department of Biochemistry and Molecular Biology, Soochow University, Suzhou 215123, Jiangsu, China.
authors.forename: Li
authors.initials: L
authors.lastname: Shen
authors.affiliation: Department of pharmacology, School of Basic Medicine, Hubei University of Medicine, Shiyan 442000, Hubei, China.
authors.forename: Xiaoxia
authors.initials: X
authors.lastname: Dong
authors.affiliation: Department of Biochemistry and Molecular Biology, Soochow University, Suzhou 215123, Jiangsu, China.
authors.forename: Meiyun
authors.initials: M
authors.lastname: Yu
authors.affiliation: Department of Clinical Oncology, Taihe Hospital, Hubei University of Medicine, Shiyan 442000, Hubei, China; Institute of Cancer Research, Taihe Hospital, Hubei University of Medicine, Shiyan 442000, Hubei, China.
authors.forename: Zhiguo
authors.initials: Z
authors.lastname: Luo
authors.affiliation: Department of Biochemistry and Molecular Biology, Soochow University, Suzhou 215123, Jiangsu, China.
authors.forename: Shiliang
authors.initials: S
authors.lastname: Wu
keywords: CD147; gastric cancer; glycosylation; invasion; β3GnT8