Asian Pacific Journal of Cancer Prevention

Asian Pacific Journal of Cancer Prevention (아시아태평양암예방학회)
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Tumor-derived CD4+CD25+ Tregs Inhibit the Maturation and Antigen-Presenting Function of Dendritic Cells

  • Du, Yong (Department of Pediatrics, First Affiliated Hospital of Wenzhou Medical University) ;
  • Chen, Xin (Department of Gastroenterology and Hepatology, First Affiliated Hospital of Wenzhou Medical University) ;
  • Lin, Xiu-Qing (Department of Gastroenterology and Hepatology, First Affiliated Hospital of Wenzhou Medical University) ;
  • Wu, Wei (Department of Gastroenterology and Hepatology, First Affiliated Hospital of Wenzhou Medical University) ;
  • Huang, Zhi-Ming (Department of Gastroenterology and Hepatology, First Affiliated Hospital of Wenzhou Medical University)
  • Published : 2015.04.14
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Abstract

CD4+CD25+regulatory T cells (Tregs) play a key role in regulation of immnue response and maintenance of self-tolerance. Studies have found Tregs could suppress tumor-specific T cell-mediated immune response and promote cancer progression. Depletion of Tregs can enhance antitumor immunity. Dendritic cells (DCs) are professional antigen-presenting cells and capable of activating antigen-specific immune responses, which make them ideal candidate for cancer immunotherapy. Now various DC vaccines are considered as effective treatment for cancers. The aim of this study was to evaluate variation of Tregs in BALB/C mice with hepatocellular carcinoma and investigate the interaction between tumor-derived Tregs, effector T cells (Teff) and splenic DCs. We found the percentages of Tregs/CD4+ in the peripheral blood of tumor-bearing mice were higher than in normal mice. Tumor-derived Tregs diminished the up-regulation of costimulatory molecule expression on splenic DCs, even in the presence of Teff cells and simultaneously inhibited IL-12 and $TNF-{\alpha}$ secretion by DCs.

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References

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