Aberrant expression of laminin 纬2 correlates with poor prognosis and promotes invasion in extrahepatic cholangiocarcinoma

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• 作者：Wei Liu ; Feng Tian ; Peng Jiang ; Xin Zhao ; Fei Guo ; Xiaowu Li ; Shuguang Wang
• 关键词：Cholangiocarcinoma ; Laminin 纬2 ; Invasion ; Prognosis
• 刊名：Journal of Surgical Research
• 出版年：January, 2014
• 年：2014
• 卷：186
• 期：1
• 页码：150-156
• 全文大小：1530 K

文摘

Background

To investigate the potential role of laminin 纬2 and its correlation with prognosis in patients with extrahepatic cholangiocarcinoma (CCA).

Materials and methods

Laminin 纬2 expression was evaluated by immunohistochemistry in 72 extrahepatic CCA patients after surgical resection. Knockdown of laminin 纬2 was achieved via small interfering RNA transfection in the extrahepatic CCA cell line QBC939.

Results

Thirty-six of 72 extrahepatic CCAs (50%) stained positive for laminin 纬2 in two types of patterns: stromal staining (28/72, 39%) and cytoplasmic staining (24/72, 33%). All 16 paracancerous tissue samples showed negative staining. Both stromal and cytoplasmic laminin 纬2 expressions correlated with lymph node metastasis. Kaplan-Meier analysis showed that aberrant expression of laminin 纬2 correlated with poor overall survival and early recurrence. Cox regression analysis further demonstrated that laminin 纬2 expression was a significant independent predictor of poor overall survival and early recurrence. Immunofluorescence staining revealed cytoplasmic expression of laminin 纬2 in QBC939 cells. Knockdown of laminin 纬2 significantly reduced QBC939 cell invasion and migration.

Conclusions

Aberrant expression of laminin 纬2 correlates with poor prognosis and promotes invasion in extrahepatic CCA.