B cells are required for tumor-targeting Salmonella in host

Che Hsin Lee, Jeng Long Hsieh, Chao-Liang Wu, Hui Chun Hsu, Ai-Li Shiau

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Systemic administration of Salmonella to tumor-bearing mice leads to the preferential accumulation within tumor sites and retardation of the tumor growth. Host factors including innate and adaptive immune responses influence Salmonella-induced antitumor activity. Antitumor activities of Salmonella are not only determined by the tumor regression but also by the host immune response. Herein, we demonstrated that B cells play an important role in the antitumor activity mediated by Salmonella. Body weight and survival of B cell-deficient mice were decreased compared with wild-type, CD8+ cell-deficient, or CD4+ cell-deficient mice after Salmonella administration. Although Salmonella accumulated within the tumors in B cell-deficient mice, the bacterial loads of healthy organs were higher than those in wild-type mice. The inflammation cytokine and bacteremia were found in B cell-deficient mice after Salmonella treatment. When Salmonella accumulated within the tumor, B cells inhibited the dissemination of Salmonella to other healthy organs. The depletion of host B cells resulted in a noticeably higher total number of Salmonella in the tumor and inhibited tumor growth. Meanwhile, B cell-depletive and B cell-adoptive transfer of serum experiments demonstrated that the natural antibody produced by B cell takes part in the control of Salmonella dissemination in tumor-bearing mice. In this study, we want to address the mechanisms of incorporating host immunoresponse as a way to augment the antitumor activities of Salmonella.

Original languageEnglish
Pages (from-to)1251-1260
Number of pages10
JournalApplied Microbiology and Biotechnology
Volume92
Issue number6
DOIs
Publication statusPublished - 2011 Dec 1

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Applied Microbiology and Biotechnology

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