High expression of N-acetylglucosaminyltransferase IVa promotes invasion of choriocarcinoma

K. Niimi, E. Yamamoto, S. Fujiwara, K. Shinjo, T. Kotani, T. Umezu, H. Kajiyama, K. Shibata, K. Ino, F. Kikkawa

研究成果: Article査読

20 被引用数 (Scopus)

抄録

Background:Gestational trophoblastic diseases (GTDs) are related to trophoblasts, and human chorionic gonadotropin (hCG) is secreted by GTDs as well as normal placentas. However, the asparagine-linked sugar chains on hCG contain abnormal biantennary structures in invasive mole and choriocarcinoma, but not normal pregnancy or hydatidiform mole. N-acetylglucosaminyltransferase-IV (GnT-IV) catalyses β1,4-N-acetylglucosamine branching on asparagine-linked oligosaccharides, which are consistent with the abnormal sugar chain structures on hCG.Methods:We investigated GnT-IVa expression in GTDs and placentas by immunohistochemistry, western blot, and RT-PCR. We assessed the effects of GnT-IVa knockdown in choriocarcinoma cells in vitro and in vivo.Results:The GnT-IVa was highly expressed in trophoblasts of invasive mole and choriocarcinoma, and moderately in extravillous trophoblasts during the first trimester, but not in hydatidiform mole or other normal trophoblasts. The GnT-IVa knockdown in choriocarcinoma cells significantly reduced migration and invasive capacities, and suppressed cellular adhesion to extracellular matrix proteins. The extent of β1,4-N-acetylglucosamine branching on β1 integrin was greatly reduced by GnT-IVa knockdown, although the expression of β1 integrin was not changed. In vivo studies further demonstrated that GnT-IVa knockdown suppressed tumour engraftment and growth.Conclusion:These findings suggest that GnT-IVa is involved in regulating invasion of choriocarcinoma through modifications of the oligosaccharide chains of β1 integrin.

本文言語English
ページ(範囲)1969-1977
ページ数9
ジャーナルBritish Journal of Cancer
107
12
DOI
出版ステータスPublished - 04-12-2012
外部発表はい

All Science Journal Classification (ASJC) codes

  • 腫瘍学
  • 癌研究

フィンガープリント

「High expression of N-acetylglucosaminyltransferase IVa promotes invasion of choriocarcinoma」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル