Transcription factor Foxo1 is a negative regulator of natural killer cell maturation and function

Immunity. 2015 Mar 17;42(3):457-70. doi: 10.1016/j.immuni.2015.02.006. Epub 2015 Mar 10.

Abstract

Little is known about the role of negative regulators in controlling natural killer (NK) cell development and effector functions. Foxo1 is a multifunctional transcription factor of the forkhead family. Using a mouse model of conditional deletion in NK cells, we found that Foxo1 negatively controlled NK cell differentiation and function. Immature NK cells expressed abundant Foxo1 and little Tbx21 relative to mature NK cells, but these two transcription factors reversed their expression as NK cells proceeded through development. Foxo1 promoted NK cell homing to lymph nodes by upregulating CD62L expression and inhibited late-stage maturation and effector functions by repressing Tbx21 expression. Loss of Foxo1 rescued the defect in late-stage NK cell maturation in heterozygous Tbx21(+/-) mice. Collectively, our data reveal a regulatory pathway by which the negative regulator Foxo1 and the positive regulator Tbx21 play opposing roles in controlling NK cell development and effector functions.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Animals
  • Cell Differentiation
  • Forkhead Box Protein O1
  • Forkhead Transcription Factors / genetics
  • Forkhead Transcription Factors / immunology*
  • Gene Expression Regulation, Neoplastic*
  • Heterozygote
  • Killer Cells, Natural / immunology*
  • Killer Cells, Natural / pathology
  • L-Selectin / genetics
  • L-Selectin / immunology
  • Lung / immunology
  • Lung / pathology
  • Lung Neoplasms / genetics*
  • Lung Neoplasms / immunology
  • Lung Neoplasms / secondary
  • Lymph Nodes / immunology
  • Lymph Nodes / pathology
  • Lymphocyte Depletion
  • Melanoma, Experimental / genetics*
  • Melanoma, Experimental / immunology
  • Melanoma, Experimental / pathology
  • Mice
  • Mice, Knockout
  • Neoplasm Transplantation
  • Signal Transduction
  • Skin Neoplasms / genetics*
  • Skin Neoplasms / immunology
  • Skin Neoplasms / secondary
  • T-Box Domain Proteins / genetics
  • T-Box Domain Proteins / immunology*

Substances

  • Forkhead Box Protein O1
  • Forkhead Transcription Factors
  • Foxo1 protein, mouse
  • T-Box Domain Proteins
  • T-box transcription factor TBX21
  • L-Selectin