In vivo Recombinant Adenovirus-mediated p53 Gene Therapy in a Syngeneic Rat Model for Colorectal Cancer.
10.3346/jkms.2004.19.6.834
- Author:
Jeong Heum BAEK
1
;
Munna L AGARWAL
;
Raymond R TUBBS
;
Alex VLADISAVLJEVIC
;
Hiroshi TOMITA
;
Ronald M BUKOWSKI
;
Jeffrey W MILSOM
;
Jin Man KIM
;
Jin Young KWAK
Author Information
1. Department of Surgery, Gachon Medical School, Gil Medical Center, Incheon, Korea.
- Publication Type:Original Article ; Research Support, Non-U.S. Gov't
- Keywords:
Colorectal Neoplasms;
Gene Therapy;
Protein p53;
Recombinant Adenovirus;
Transgenes
- MeSH:
Adenocarcinoma/genetics/pathology/therapy;
Adenoviridae/*genetics;
Animals;
Cell Line, Tumor;
Cell Proliferation;
Cell Survival/genetics;
Colorectal Neoplasms/*genetics/pathology/*therapy;
Disease Models, Animal;
Female;
Gene Therapy/*methods;
Gene Transfer Techniques;
Men;
Protein p53/*genetics/*therapeutic use;
Rats;
Rats, Inbred WF;
Recombinant Proteins/therapeutic use;
Research Support, Non-U.S. Gov't;
Transplantation, Isogeneic;
Treatment Outcome
- From:Journal of Korean Medical Science
2004;19(6):834-841
- CountryRepublic of Korea
- Language:English
-
Abstract:
The p53 gene has a significant role in controlling genomic stability of cancer. The purpose of this study was to evaluate the tumor response of allograft colorectal tumor treated with Ad5CMV-p53 in a syngeneic rat model. Two weeks after the inoculation of WB-2054-M5 tumor cells in the flank of rats, rats were randomly assigned by tumor size to one of three groups (n=18 in each): phosphate buffered saline (PBS), Ad5CMV, and Ad5CMV-p53. Recombinant adenovirus or PBS was administered through intratumoral injection at three divided doses every other day for 4 weeks. Apoptosis of the tumors was evaluated using TUNEL assay. After 2 and 4 weeks of treatment, the volume (cm3) of tumors in PBS, Ad5CMV, and Ad5CMV-p53 was as follows: 2 week: 1.66 +/-0.43, 1.40 +/-0.47, 0.75 +/-0.26 (p<0.001), 4 week: 4.41 +/-0.88, 3.93 +/-1.86, 2.33 +/-0.51 (p<0.001). Tumor growth showed no statistically significant difference between the PBS and Ad5CMV groups (6-week vol. p=0.32). The TUNEL assay results revealed more apparent apoptotic cells in Ad5CMV-p53-treated tumors than in other groups. Growth of allograft colorectal cancer in the syngeneic rat model was significantly suppressed by intratumoral Ad5CMV-p53 gene therapy. These results demonstrate that gene replacement therapy with p53 may provide a novel modality of treatment in conjunction with other present treatments for metastatic colorectal cancer.
