L1 cell adhesion molecule overexpression in hepatocellular carcinoma associates with advanced tumor progression and poor patient survival

Guo Xiaodong, Xiong Lu, Zou Lin, Sun Ting, Jing Zhang, Li Hanwei, Peng Ruiyun, Zhao, Zhao Jingmin

Description

Objective L1 cell adhesion molecule (L1CAM), as a member of the immunoglobulin superfamily, has recently been observed in a variety of human malignancies. However, no data of L1CAM are available for hepatocellular carcinoma (HCC). The aim of this study was to investigate the expression of L1CAM in HCC and determine its correlation with tumor progression and prognosis. Methods One-hundred and thirty HCC patients who had undergone curative liver resection were selected and immunohistochemistry, Western blotting, and quantitative real time polymerase chain reaction (Q-PCR) were performed to analyze L1CAM expression in the respective tumors. Results Immunohistochemistry, Western blotting, and Q-PCR consistently confirmed the overexpression of L1CAM in HCC tissues compared with their adjacent nonneoplastic tissues at both protein and gene level (both P <0.01). Additionally, the high expression of L1CAM was significantly associated with advanced tumor stage (P = 0.02) and advanced tumor grade (P = 0.03), respectively. Moreover, HCC patients with high L1CAM expression were significantly associated with lower 5-year overall survival (P <0.01) and lower 5-year disease-free survival (P <0.01), respectively. The Cox proportional hazards model further showed that L1CAM over-expression was an independent poor prognostic factor for both 5-year disease-free survival (P = 0.02) and 5-year overall survival (P = 0.008) in HCC. Conclusion Our data suggest for the first time that L1CAM expression in HCC was significantly correlated with the advanced tumor progression and was an independent poor prognostic factor for both overall survival and disease-free survival in patients with HCC. Virtual slides The virtual slide(s) for this article can be found here: http://www.diagnosticpathology.diagnomx.eu/vs/1970024872761542

Sujets

• Hepatocellular carcinoma
• Expression
• Prognosis

Informations

• Publié par: biomed
• Publié le: 01 janvier 2012
• Nombre de lectures: 7
• Langue: English

Extrait

Guoet al. Diagnostic Pathology2012,7:96 http://www.diagnosticpathology.org/content/7/1/96

R E S E A R C H

Open Access

L1 cell adhesion molecule overexpression in hepatocellular carcinoma associates with advanced tumor progression and poor patient survival 1,2†3†3 1 3* 1*4 5 Xiaodong Guo , Lu Xiong , Lin Zou , Ting Sun , Jing Zhang , Hanwei Li , Ruiyun Peng and Jingmin Zhao

Abstract Objective:L1 cell adhesion molecule (L1CAM), as a member of the immunoglobulin superfamily, has recently been observed in a variety of human malignancies. However, no data of L1CAM are available for hepatocellular carcinoma (HCC). The aim of this study was to investigate the expression of L1CAM in HCC and determine its correlation with tumor progression and prognosis. Methods:Onehundred and thirty HCC patients who had undergone curative liver resection were selected and immunohistochemistry, Western blotting, and quantitative real time polymerase chain reaction (QPCR) were performed to analyze L1CAM expression in the respective tumors. Results:Immunohistochemistry, Western blotting, and QPCR consistently confirmed the overexpression of L1CAM in HCC tissues compared with their adjacent nonneoplastic tissues at both protein and gene level (both P <0.01). Additionally, the high expression of L1CAM was significantly associated with advanced tumor stage (P = 0.02) and advanced tumor grade (P = 0.03), respectively. Moreover, HCC patients with high L1CAM expression were significantly associated with lower 5year overall survival (P <0.01) and lower 5year diseasefree survival (P <0.01), respectively. The Cox proportional hazards model further showed that L1CAM overexpression was an independent poor prognostic factor for both 5year diseasefree survival (P = 0.02) and 5year overall survival (P = 0.008) in HCC. Conclusion:Our data suggest for the first time that L1CAM expression in HCC was significantly correlated with the advanced tumor progression and was an independent poor prognostic factor for both overall survival and diseasefree survival in patients with HCC. Virtual slides:The virtual slide(s) for this article can be found here: http://www.diagnosticpathology.diagnomx.eu/ vs/1970024872761542 Keywords:Hepatocellular carcinoma, L1 cell adhesion molecule, Expression, Tumor progression, Prognosis

* Correspondence: [e-mail]; [e-mail] † Equal contributors 1 Postgraduate Medical School of PLA, Beijing 100853, China 3 Beijing Institute of Radiation Medicine, 27 Taiping Road, Beijing 100850, China Full list of author information is available at the end of the article

© 2012 Guo et al.; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.