Expression of CD44 variants in gastric carcinoma with or without Epstein-Barr virus

✍ Scribed by Ja-Mun Chong; Masashi Fukayama; Yukiko Hayashi; Nobuaki Funata; Toichirou Takizawa; Morio Koike; Masatoshi Muraoka; Rei Kikuchi-Yanoshita; Michiko Miyaki; Shoichi Mizuno

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: French
• Weight: 139 KB
• Volume: 74
• Category: Article
• ISSN: 0020-7136
• DOI: 10.1002/(sici)1097-0215(19970822)74:4<450::aid-ijc16>3.0.co;2-d

✦ Synopsis

The significance of CD44 variants in gastric carcinoma has not been fully investigated in terms of the pathological features of the carcinoma, including its association with Epstein-Barr virus (EBV). In this study, a total of 104 primary gastric carcinoma tissues (EBV-associated gastric carcinomas, EBVaGC, and EBV-negative carcinomas) were evaluated by immunohistochemistry. When the immunoreactivity of formalin-fixed, paraffin-embedded sections was graded on a scale of 0-3, the frequencies of grades 0-1, 2 and 3 were, respectively, 77%, 16% and 7% using monoclonal antibody (MAb) 3G5, which recognizes V3-5, and 70%, 14% and 15% with MAb 2F10, which recognizes V6. The expression of CD44 variants is independently correlated with lymph node metastasis and EBV-association in gastric carcinoma. Significant correlations were observed between V3-5 expression and lymph vessel invasion or lymph node metastasis, and between V6 expression and lymph node metastasis. The expression of both variants was significantly correlated with EBV-association. EBV-association and lymph node metastasis contributed independently to CD44 variant expression by multivariate analysis. Thus, the mechanism and significance of CD44 variant-expression are different in gastric carcinomas with or without EBV. EBVaGC is a distinct type of gastric carcinoma which should be considered separately from EBV-negative carcinoma.