TNF-α is critical for antitumor but not antiviral T cell immunity in mice

Thomas Calzascia, Marc Pellegrini, Håkan Hall, Laurent Sabbagh, Nobuyuki Ono, Alisha R. Elford, Tak W. Mak, Pamela S. Ohashi

Research output: Contribution to journalArticlepeer-review

169 Citations (Scopus)

Abstract

TNF-α antagonists are widely used in the treatment of inflammatory and autoimmune diseases, but their use is associated with reactivation of latent infections. This highlights the importance of TNF-α in immunity to certain pathogens and raises concerns that critical aspects of immune function are impaired in its absence. Unfortunately, the role of TNF-α in the regulation of T cell responses is clouded by a myriad of contradictory reports. Here, we show a role for TNF-α and its receptors, TNFR1 and TNFR2, specifically in antitumor immunity. TNF-α-deficient mice exhibited normal antiviral responses associated with strong inflammation. However, TNF-α/TNFR1-mediated signals on APCs and TNF-α/TNFR2 signals on T cells were critically required for effective priming, proliferation, and recruitment of tumor-specific T cells. Furthermore, in the absence of TNF-α signaling, tumor immune surveillance was severely abrogated. Finally, treatment with a CD40 agonist alone or in combination with TLR2 stimuli was able to rescue proliferation of TNF-α-deficient T cells. Therefore, TNF-α signaling may be required only for immune responses in conditions of limited immunostimulatory capacity, such as tumor surveillance. Importantly, these results suggest that prolonged continuous TNF-α blockade in patients may have long-term complications, including potential tumor development or progression.

Original languageEnglish
Pages (from-to)3833-3845
Number of pages13
JournalJournal of Clinical Investigation
Volume117
Issue number12
DOIs
Publication statusPublished - Dec 2007

All Science Journal Classification (ASJC) codes

  • Medicine(all)

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