AAV2-mediated interleukin-12 in the treatment of malignant brain tumors through activation of NK cells

  • Authors:
    • Tsung-Lang Chiu
    • Shinn-Zong Lin
    • Wan-Hua Hsieh
    • Chih-Wen Peng
  • View Affiliations

  • Published online on: December 1, 2009     https://doi.org/10.3892/ijo_00000454
  • Pages: 1361-1367
Metrics: Total Views: 0 (Spandidos Publications: | PMC Statistics: )
Total PDF Downloads: 0 (Spandidos Publications: | PMC Statistics: )


Abstract

Interleukin-12 has been elucidated as a powerful anti-cancer factor in pre-clinical research. However, the obstacles of this modality that emerged from human clinical trails included the toxicity of repeated large dose administration and short effective duration. Therefore, a prolonged, constant therapeutic level of interleukin-12 is required to reduce the adverse effects and enhance the therapeutic efficacy. In this study, 54 nude mice were divided into three groups treated with rAAV2 encoding interleukin-12, rAAV2 vector, and PBS, respectively. All nude mice received human glioblastoma multiforme cell line DBTRG implantation. The biochemistry studies included serum levels of interleukin-12, isotypes of immunoglobulin, interferon-γ, and TNF-α. The activated NK cells were sorted from the spleen by flow cytometry and the cytotoxicity of NK cells were evaluated by LDH assay. In the rAAV2 encoding interleukin-12 group, substantial expression of interleukin-12 was obtained with a serum level of 120-150 pg/ml through the experimental course and a significant increase of activated NK cells was achieved. The splenocytes extracted from the spleen in rAAV2 encoding IL-12 mice strongly exhibited cytotoxic activity compared to the control groups (p<0.001). The IgG1, IgG2a, and IgM also showed a significant increase in the rAAV2 encoding IL-12 group compared to the control groups (p<0.05). The tumor growth rate decreased obviously in the rAAV2 encoding IL-12 group with a significant difference from the control groups (p<0.001). This study demonstrated an encouraging result of immunomodulative therapy in malignant brain tumors by rAAV2 carrying IL-12 through activating NK cells.

Related Articles

Journal Cover

December 2009
Volume 35 Issue 6

Print ISSN: 1019-6439
Online ISSN:1791-2423

Sign up for eToc alerts

Recommend to Library

Copy and paste a formatted citation
x
Spandidos Publications style
Chiu T, Lin S, Hsieh W and Peng C: AAV2-mediated interleukin-12 in the treatment of malignant brain tumors through activation of NK cells. Int J Oncol 35: 1361-1367, 2009.
APA
Chiu, T., Lin, S., Hsieh, W., & Peng, C. (2009). AAV2-mediated interleukin-12 in the treatment of malignant brain tumors through activation of NK cells. International Journal of Oncology, 35, 1361-1367. https://doi.org/10.3892/ijo_00000454
MLA
Chiu, T., Lin, S., Hsieh, W., Peng, C."AAV2-mediated interleukin-12 in the treatment of malignant brain tumors through activation of NK cells". International Journal of Oncology 35.6 (2009): 1361-1367.
Chicago
Chiu, T., Lin, S., Hsieh, W., Peng, C."AAV2-mediated interleukin-12 in the treatment of malignant brain tumors through activation of NK cells". International Journal of Oncology 35, no. 6 (2009): 1361-1367. https://doi.org/10.3892/ijo_00000454