C4.4A expression is associated with a poor prognosis of esophageal squamous cell carcinoma

Masahisa Ohtsuka, Hirofumi Yamamoto, Toru Masuzawa, Hidekazu Takahashi, Mamoru Uemura, Naotsugu Haraguchi, Junichi Nishimura, Taishi Hata, Makoto Yamasaki, Hiroshi Miyata, Ichiro Takemasa, Tsunekazu Mizushima, Shuji Takiguchi, Yuichiro Doki, Masaki Mori

研究成果: Contribution to journalArticle査読

11 被引用数 (Scopus)

抄録

Background: C4.4A is a glycolipid-anchored membrane protein expressed in several human malignancies. We examined clinical relevance of C4.4A expression in 111 esophageal squamous cell carcinoma (ESCC) tissue samples. Methods: Anti-human C4.4A antibody that recognizes the glycosylphosphatidyl inositol (GPI) anchor signaling sequence (C4.4A-GPI Ab) and anti-human C4.4A-119 polyclonal antibody (C4.4A-119 Ab) were used for immunohistochemistry and Western blot testing. Results: Both antibodies detected the C4.4A protein expression at the parabasal layer of normal epithelium of the esophagus. In tumor tissues, the C4.4A protein was detected in 66 (59.5 %) and 95 (85.6 %) of 111 ESCCs by the C4.4A-GPI Ab and the C4.4A-119 Ab, respectively. The C4.4A-GPI Ab mainly detected membranous C4.4A expression (83.3 %, 55 of 66 positive cases), while the C4.4A-119 Ab exclusively detected cytoplasmic C4.4A expression (100 %, 73 cytoplasm alone and 22 cytoplasm plus membrane in 95 positive cases). Western blot analysis indicated that normal epithelium expressed the band of C4.4A at 70 kDa, whereas the tumor tissues displayed the band at the lower molecular weight. Survival analysis indicated that the C4.4A-positive ESCCs had significantly worse 5-year overall survival than the C4.4A-negative ESCC samples (P = 0.021) when using the C4.4A-GPI Ab, but not when using the C4.4A-119 Ab. This difference was most evident with membranous expression of C4.4A (P = 0.005). Conclusions: C4.4A expression was associated with a poor prognosis of ESCC when the GPI-related antibody was used. On the other hand, the C4.4A-119 Ab may be a useful diagnostic tool for ESCC because of its high detection rate.

本文言語英語
ページ(範囲)2699-2705
ページ数7
ジャーナルAnnals of Surgical Oncology
20
8
DOI
出版ステータス出版済み - 8 2013
外部発表はい

All Science Journal Classification (ASJC) codes

  • 外科
  • 腫瘍学

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