Fibulin-3 is associated with tumour progression and a poor prognosis in nasopharyngeal carcinomas and inhibits cell migration and invasion via suppressed AKT activity

作者：Hwang Chung Feng; Chien Chih Yen; Huang Shun Cheng; Yin Yu Fang; Huang Chao Cheng; Fang Fu Min; Tsai Hsin Ting; Su Li Jen; Chen Chang Han^*

来源：Journal of Pathology, 2010, 222(4): 367-379.

DOI：10.1002/path.2776

• nasopharyngeal carcinoma
• fibulin-3
• migration
• invasion
• p-AKT

Nasopharyngeal carcinoma (NPC) is known for its highly metastatic character. Recent advances in diagnosis and treatment have not improved the high mortality rate that is attributable to early metastasis. Although several biomarkers correlate with metastasis and prognosis, the molecular mechanisms of NPC development and progression remain unclear. We demonstrate comprehensively that fibulin-3 is down-regulated in NPC. Loss of fibulin-3 expression is significantly correlated with advanced tumour and lymph node-metastasis stages, and indicates a poor 5-year survival rate. Functionally, fibulin-3 has the ability to suppress cell migration and invasion in NPC cancer cells by decreasing the activity of phospho-AKT. Conversely, its depletion by fibulin-3-mediated siRNAs may elevate phospho-AKT activity and significantly enhance the ability of NPC cancer cells to migrate and invade. Consistent with this negative association between fibulin-3 and phospho-AKT, their expression levels are inversely correlated in NPC specimens by immunohistochemical analysis. Thus, lower fibulin-3 expression is an important indicator of poor survival. It may also contribute to the development of new therapeutic strategies to block the PI3K/AKT pathway in NPC cancer cells.

• 出版日期2010-12
• 单位长春大学; 中央民族大学