Liver Cancer
Copyright ©The Author(s) 2003. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Gastroenterol. Mar 15, 2003; 9(3): 479-484
Published online Mar 15, 2003. doi: 10.3748/wjg.v9.i3.479
Antitumor immunopreventive and immunotherapeutic effect in mice induced by hybrid vaccine of dendritic cells and hepatocarcinoma in vivo
Jin-Kun Zhang, Jun Li, Juan Zhang, Hai-Bin Chen, Su-Biao Chen
Jin-Kun Zhang, Jun Li, Juan Zhang, Hai-Bin Chen, Su-Biao Chen, Cancer Pathology Laboratory, Shantou University Medical College, Shantou 515031, Guangdong Province, China
Author contributions: All authors contributed equally to the work.
Supported by the Natural Science Foundation of Guangdong Province, China, No. 980180; the Woman Science and Technology Workers Association of Guangdong Province, China, No.2001001
Correspondence to: Prof. Jin Kun Zhang, Tutor of Doctor, Cancer Pathology Laboratory, Shantou University Medical College, 22 Xinlinglu, Shantou 515031, Guangdong Province, China. jkzhang@stu.edu.cn
Telephone: +86-754-8900443 Fax: +86-754-8557562
Received: July 20, 2002
Revised: August 20, 2002
Accepted: October 12, 2002
Published online: March 15, 2003
Abstract

AIM: To develop atumor vaccine by fusion of H22 hepatocarcinoma cells and DC, and to study its protective and therapeutical effect against H22 cell.

METHODS: H22-DC vaccine was produced by PEG fusion of H22 and DC induced by cytokine released from splenic mononuclear cells, sorted by CD11c magnetic microbead marker. It was injected through the tail vein of the mice and the H22-DC oncogenesis was detected in the liver, spleen and lung. In order to study the therapeutical and protective effect of H22-DC against tumor H22, two groups were divided: immune group and therapeutic group. Immune group was further divided into P, D, HD and H subgroups, immunized by PBS, DC, H22-DC and inactivated H22, respectively, and attacked by H22 cell. The tumor size, tumor weight, mice survival time and tumor latent period were recorded and statistically analyzed; Therapeutical group was divided into three subgroups of P, D and HD, and attacked by H22, then treated with PBS, DC, and H22-DC, respectively. Pathology and flow cytometry were also applied to study the mechanism how the H22-DC vaccine attacked on the H22 cell.

RESULTS: 1. No oncogenesis was found in spleen, lung and liver after H22-DC injection. 2. Hybrid vaccine immunized mice had strongest CTL activity. 3. In the immune group, latent period was longer in HD subgroup than that in P, H and D subgroup; and tumor size and weight were smaller in HD subgroup than that in P, H and D subgroup. 4. In therapeutic group, tumor size was smaller in HD subgroup than that in P, D subgroup.

CONCLUSION: 1. H22-DC tumor vaccine is safe without oncogenesis in vivo. 2. Hybrid vaccine can stimulate potent specific CTL activity against H22. 3. H22-DC vaccine has distinctive prophylatic effect on tumor H22 and can inhibit the tumor growth.

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