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Mannan-modified Ad5-PTEN treatment combined with docetaxel improves the therapeutic effect in H22 tumor-bearing mice

Authors Liu Z, Li J, Li J, Huang J, Ke F, Qi Q, Jiang X, Zhong Z

Received 19 May 2012

Accepted for publication 27 June 2012

Published 17 September 2012 Volume 2012:7 Pages 5039—5049

DOI https://doi.org/10.2147/IJN.S34022

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 4

Zhongbing Liu, Jinwei Li, Juan Li, Juan Huang, Famin Ke, Qiaona Qi, Xing Jiang, Zhirong Zhong

Luzhou Medical College, Luzhou, Sichuan, People's Republic of China

Background: It has been reported that the tumor suppressor gene, PTEN, which is inactivated in many malignant tumors, plays an important role in apoptosis, cell cycle arrest, cell migration, and cell spread. For cancer gene therapy, one of the most important problems is low gene transfection efficiency.
Methods: In the present study, to take full advantage of adenovirus in gene expression, we prepared mannan-modified recombinant adenovirus using the PTEN gene (Man-Ad5-PTEN) and investigated the effect of Man-Ad5-PTEN combined with docetaxel (Man-Ad5-PTEN-docetaxel) on tumor growth in a murine model of hepatocellular carcinoma.
Results: Man-Ad5-PTEN effectively suppressed tumor growth and induced significant apoptosis of murine H22 hepatoma in vivo. Apoptosis levels in tumor-bearing mice treated with Man-Ad5-PTEN-docetaxel were significantly higher than those in tumor-bearing mice treated with naked Ad5-PTEN, Man-Ad5-PTEN, or docetaxel alone. Treatment with Man-Ad5-PTEN-docetaxel resulted in a significant inhibitory effect in this tumor model. Compared with the controls treated with phosphate-buffered solution, the tumor inhibition rate with naked Ad5-PTEN, docetaxel, Man-Ad5-PTEN, and Man-Ad5-PTEN-docetaxel was 48.69%, 49.98%, 75.88%, and 96.93%, respectively.
Conclusion: These results suggest that combined treatment with Man-Ad5-PTEN and other chemotherapeutic agents may be a potent adjuvant therapeutic approach for the treatment of hepatocellular carcinoma.

Keywords: cancer gene therapy, adenovirus vector, PTEN gene, mannan, docetaxel

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