B7DC/PDL2 promotes tumor immunity by a PD-1-independent mechanism

Xingluo Liu, Jian Xin Gao, Jing Wen, Lijie Yin, Ou Li, Tao Zuo, Thomas F. Gajewski, Yang Xin Fu, Pan Zheng, Yang Liu

Research output: Contribution to journalArticle

117 Scopus citations


B7H1 (PDL1) and B7DC (PDL2) are two new members of the B7 family that can interact with PD-1, a putative negative regulator for immune function. Recent studies have provided evidence for inhibitory functions of both members via PD-1. Meanwhile, compelling evidence exists for costimulatory function of both members. Here we demonstrate that expression of B7DC on the tumor cells promotes CD8 T cell-mediated rejection of tumor cells, at both the induction and effector phase of antitumor immunity. Moreover, B7DC binds to PD-1(-/-) cells and enhances T cell killing in a PD-1-independent mechanism. Our results demonstrate a novel pathway for B7DC to promote tumor immunity and may reconcile the apparently contradictory findings on the function of B7DC.

Original languageEnglish (US)
Pages (from-to)1721-1730
Number of pages10
JournalJournal of Experimental Medicine
Issue number12
StatePublished - Jun 16 2003


  • Costimulatory molecules
  • Cytolytic T lymphocytes
  • Tumor immunity

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

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    Liu, X., Xin Gao, J., Wen, J., Yin, L., Li, O., Zuo, T., Gajewski, T. F., Fu, Y. X., Zheng, P., & Liu, Y. (2003). B7DC/PDL2 promotes tumor immunity by a PD-1-independent mechanism. Journal of Experimental Medicine, 197(12), 1721-1730. https://doi.org/10.1084/jem.20022089