Interleukin-10 expression in macrophages during phagocytosis of apoptotic cells is mediated by homeodomain proteins Pbx1 and Prep-1. Academic Article uri icon

Overview

abstract

  • Production of interleukin (IL)-10, a major immunoregulatory cytokine, by phagocytes during clearance of apoptotic cells is critical to ensuring cellular homeostasis and suppression of autoimmunity. Little is known about the regulatory mechanisms in this fundamental process. We report that IL-10 production stimulated by apoptotic cells was regulated at the point of transcription in a manner dependent on p38 mitogen-activated protein kinase, partially on the scavenger receptor CD36, and required cell-cell contact but not phagocytosis. By using a reporter assay, we mapped the apoptotic-cell-response element (ACRE) in the human IL10 promoter and provide biochemical and physiological evidence that ACRE mediates the transcriptional activation of IL10 by pre-B cell leukemia transcription factor-1b and another Hox cofactor Pbx-regulating protein 1 in response to apoptotic cells. This study establishes a role of two developmentally critical factors (Pbx1 and Prep-1) in the regulation of homeostasis in the immune system.

publication date

  • December 1, 2007

Research

keywords

  • Apoptosis
  • DNA-Binding Proteins
  • Homeodomain Proteins
  • Interleukin-10
  • Macrophages
  • Phagocytosis
  • Proto-Oncogene Proteins
  • Transcription Factors

Identity

PubMed Central ID

  • PMC2194654

Scopus Document Identifier

  • 37049031230

Digital Object Identifier (DOI)

  • 10.1016/j.immuni.2007.11.014

PubMed ID

  • 18093541

Additional Document Info

volume

  • 27

issue

  • 6