T-bet-dependent expression of osteopontin contributes to T cell polarization

Mari L. Shinohara, Marianne Jansson, Eun Sook Hwang, Miriam B.F. Werneck, Laurie H. Glimcher, Harvey Cantor

Research output: Contribution to journalArticlepeer-review

115 Scopus citations

Abstract

The osteopontin (Opn) glycoprotein has been implicated in diverse physiological processes, including vascularization, bone formation, and inflammatory responses. Studies of its role in immune responses has suggested that Opn can set the early stage of type-1 immune (cell-mediated) responses through differential regulation of IL-12 and IL-10 cytokine gene expression in macrophages. Although Opn has been suggested to play a role in the development of type-1 immunity, little is known about control of Opn gene expression. Here, we report that Opn gene expression in activated T cells, but not macrophages, is regulated by T-bet, a transcription factor that controls CD4+ T helper (Th1) cell lineage commitment. We also find that T-bet-dependent expression of Opn in T cells is essential for efficient skewing of CD4 + T and CD8+ T cells toward the Th1 and type 1 CD8 + T cells (Tc1) pathway, respectively. Taken together, these findings begin to delineate the genetic basis of Opn expression in T cells and further clarify the role of Opn in Th and Tc1 development.

Original languageEnglish
Pages (from-to)17101-17106
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume102
Issue number47
DOIs
StatePublished - 22 Nov 2005

Keywords

  • Genetic programming
  • T helper 1 development
  • Type-1 immune response

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