Tumor Biology

, Volume 36, Issue 11, pp 8367–8377 | Cite as

Gab1 regulates proliferation and migration through the PI3K/Akt signaling pathway in intrahepatic cholangiocarcinoma

  • Haiquan Sang
  • Tingting Li
  • Hangyu Li
  • Jingang Liu
Research Article


Intrahepatic cholangiocarcinoma is the second most common primary malignant tumor of the liver, and it originates from the intrahepatic biliary duct epithelium. Prognosis is poor due to lack of effective comprehensive treatments. In this study, we assessed the expression of Gab1, VEGFR-2, and MMP-9 in intrahepatic cholangiocarcinoma solid tumors by immunohistochemistry and determined whether their expression was associated with clinical and pathological features. We found that expression of Gab1, VEGFR-2, and MMP-9 was highly and positively correlated with each other and with lymph node metastasis and TNM stage in intrahepatic cholangiocarcinoma tissues. Interference of Gab1 and VEGFR-2 expression via siRNA in the intrahepatic cholangiocarcinoma cell line RBE resulted in decreased PI3K/Akt pathway activity. Inhibition of Gab1 and VEGFR-2 expression also caused decreased cell proliferation, cell cycle arrested in G1 phase, increased apoptosis, and decreased invasion in RBE cells. These results suggest that Gab1, VEGFR-2, and MMP-9 contribute significantly to the highly malignant behavior of intrahepatic cholangiocarcinoma. The regulation of growth, apoptosis, and invasion by Gab1 through the VEGFR-2/Gab1/PI3K/Akt signaling pathway may represent potential targets for improving the treatment of intrahepatic cholangiocarcinoma.


Gab1 Intrahepatic cholangiocarcinoma PI3K/Akt Proliferation Apoptosis Migration 



This work was partly supported by the National Natural Science Foundation of China [project no. 81001091].

Conflicts of interest



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Copyright information

© International Society of Oncology and BioMarkers (ISOBM) 2015

Authors and Affiliations

  • Haiquan Sang
    • 1
  • Tingting Li
    • 2
  • Hangyu Li
    • 1
  • Jingang Liu
    • 1
  1. 1.Department of General SurgeryThe Fourth Affiliated Hospital of China Medical UniversityShenyangChina
  2. 2.Department of Clinical Genetics, Shengjing HospitalChina Medical UniversityShenyangChina

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