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Int. J. Mol. Sci. 2013, 14(12), 24293-24304; doi:10.3390/ijms141224293
Article

Effect of the GLP-1 Analog Exendin-4 and Oxaliplatin on Intrahepatic Cholangiocarcinoma Cell Line and Mouse Model

1,†
, 2,†
, 3,†
, 4
, 1
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 and 1,*
Received: 9 September 2013; in revised form: 4 November 2013 / Accepted: 13 November 2013 / Published: 13 December 2013
(This article belongs to the Section Molecular Pathology)
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Abstract: The influence of Glucagon-like peptide-1 (GLP-1) and Exendin-4 on development of intrahepatic cholangiocarcinoma (ICC) is evaluated in the study. In vitro tests, including acute toxicity test, cell colony formation assays, cells proliferation and apoptosis, transwell assay, were performed. An ICC in situ tumor animal model was established. Then, animals were randomly divided into four groups (n = 6): control, Exendin-4 treatment, oxaliplatin treatment and Exendin-4-oxaliplatin treatment. Animals in the Exendin-4 treatment and Exendin-4-oxaliplatin treatment groups received a subcutaneous injection of Exendin-4 (100 μg/kg/day) for 1 week, and then received oxaliplatin (10 mg/kg/week) by tail vein injection. Animals in the control group received PBS. Immunohistochemistry tests were used for PCNA, Ki67, Caspase 3 expression in tumor tissue. Results show that that, after incubation of human cholangiocarcinoma cell lines, HuCCTI and GLP-1, or HuCCTI and Exendin-4, colony formation number was sharply decreased. However, GLP-1, HuCCTI or Exendin-4 did not affect the colony of normal cells. Combination treatment with oxaliplatin and Exendin-4 can significantly inhibit tumor cells’ proliferation and promote apoptosis. The combined effect is stronger than that of oxaliplatin or Exendin-4. Combination treatment with oxaliplatin and Exendin4 can significantly decrease Ki67 and PCNA proteins’ expression in subcutaneous tumors of nude mice. The inhibitory effect of Combination treatment with oxaliplatin and Exendin4 is clearly stronger than that of oxaliplatin. In addition, Combination treatment with oxaliplatin and Exendin4 can significantly increase Caspase3 protein positive expression. In short, these results show that combination treatment with oxaliplatin and Exendin4 can inhibit tumor cells’ proliferation, and promote apoptosis.
Keywords: intrahepatic cholangiocarcinoma; GLP-1; exendin-4; mice; PCNA intrahepatic cholangiocarcinoma; GLP-1; exendin-4; mice; PCNA
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Chen, B.-D.; Zhao, W.-C.; Jia, Q.-A.; Zhou, W.-Y.; Bu, Y.; Wang, Z.-Z.; Wang, F.; Wu, W.-J.; Wang, Q. Effect of the GLP-1 Analog Exendin-4 and Oxaliplatin on Intrahepatic Cholangiocarcinoma Cell Line and Mouse Model. Int. J. Mol. Sci. 2013, 14, 24293-24304.

AMA Style

Chen B-D, Zhao W-C, Jia Q-A, Zhou W-Y, Bu Y, Wang Z-Z, Wang F, Wu W-J, Wang Q. Effect of the GLP-1 Analog Exendin-4 and Oxaliplatin on Intrahepatic Cholangiocarcinoma Cell Line and Mouse Model. International Journal of Molecular Sciences. 2013; 14(12):24293-24304.

Chicago/Turabian Style

Chen, Ben-Dong; Zhao, Wen-Chao; Jia, Qing-An; Zhou, Wen-Yan; Bu, Yang; Wang, Zuo-Zheng; Wang, Feng; Wu, Wu-Jun; Wang, Qi. 2013. "Effect of the GLP-1 Analog Exendin-4 and Oxaliplatin on Intrahepatic Cholangiocarcinoma Cell Line and Mouse Model." Int. J. Mol. Sci. 14, no. 12: 24293-24304.



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