PMID: 11932902Apr 5, 2002Paper

Molecular pathology parameters in human nasopharyngeal carcinoma

Cancer
Wei ShiFei-Fei Liu

Abstract

To derive a better understanding of the biologic behavior of nasopharyngeal carcinoma (NPC), the authors evaluated a number of molecular variables to address the hypothesis that p53 dysfunction in NPC is associated with Epstein-Barr virus (EBV), increased tumor angiogenesis, lower likelihood of apoptosis, and poorer clinical outcome. The biopsy samples from 87 NPC patients were obtained and sections were made to detect EBV, using in-situ hybridization; the authors used immunohistochemistry to assess p53, p21(WAF1/CIP1) expression, and microvessel density count (MVD). In situ end labelling was used to evaluate apoptosis and necrosis. Analyses were conducted on the association between each of these variables as well as clinical outcome, including survival and local control. There was a highly significant association between EBV-encoded RNA (EBER) positivity with p53 over-expression in that only 1 out of 32 p53 over-expressing tumors was EBER negative, as opposed to 19 out of 48 p53 negative tumors being EBER negative (P = 0.001). In addition, EBER positivity was highly associated with World Health Organization (WHO) type 3 NPC, Asian/Chinese ethnicity, a lower apoptotic index, and p21 over-expression. p53 over-expression was asso...Continue Reading

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