Deregulated cyclooxygenase-2 expression in oral premalignant tissues.

Deregulated cyclooxygenase-2 expression in oral premalignant tissues.
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口腔癌前组织中环氧合酶 2 表达失调。

DOI:
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发表时间:
2002
影响因子:
5.7
通讯作者:
J. Vishwanatha
J. Vishwanatha
中科院分区:
医学2区
文献类型:
--
作者:
A. Banerjee;V. Gopalakrishnan;Indraneel Bhattacharya;J. Vishwanatha

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建立一种早期且可靠的口腔癌生物标志物,其表达可以通过非侵入性技术进行监测,这将有助于癌症的早期诊断。环加氧酶 (COX) 先前已被证实与多种人类恶性肿瘤有关,并且特定 COX-2 抑制剂的治疗益处已被阐明。在代表口腔癌癌前和恶性阶段的人类档案标本中研究了 COX-2 的表达和随后的恶性进展标志物。我们发现,COX-2 基因表达的变化先于口腔癌前组织中与细胞凋亡和血管生成相关的生物标志物表达的变化,这是一种名副其实的表型。我们还首次报告了发育不良样本和人乳头瘤病毒转化细胞系 HOK-16B 中的 COX-2 mRNA 变异,表明人乳头瘤病毒感染可能稳定 COX-2 信息,作为口腔癌的早期事件。与细胞凋亡和血管生成途径基因相关的其他肿瘤进展标志物的表达在口腔癌前组织中显示出相对较低水平的变化。然而,通过细胞因子基因表达谱的变化观察到抗肿瘤免疫力下降的决定性转变。
Establishment of an early and reliable biomarker for oral carcinogenesis whose expression can be monitored through noninvasive techniques will enable early diagnosis of cancer. Cyclooxygenases (COXs) have been implicated previously in several human malignancies, and the therapeutic benefit of specific COX-2 inhibitors has been elucidated. The expression of COX-2 and subsequent markers of malignant progression was studied in archival human specimens representing premalignant and malignant stages of oral cancer. We find that changes in COX-2 gene expression precede changes in expression of biomarkers related to apoptosis and angiogenesis in oral premalignant tissues as a veritable phenotype. We also report for the first time COX-2 mRNA variants in dysplastic samples and in a human papillomavirus-transformed cell line HOK-16B, indicating a possible stabilization of COX-2 message by human papillomavirus infection as an early event in oral cancer. Expression of other markers of tumor progression related to apoptosis and angiogenesis pathway genes shows relatively low level of changes in oral premalignant tissue. However, a determinant shift toward decrease in antitumor immunity was observed by cytokine gene expression profile changes.
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