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Interleukin-24 and its receptors

Mai Wang1, Peng Liang

  • 1Department of Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN 37232, USA.

Immunology
|January 26, 2005
PubMed

Insights

Interleukin 24 (IL-24), a cytokine from the IL-10 family, signals via specific receptors to activate transcription factors involved in cell survival. This review focuses on IL-24

Area of Science:

  • Immunology
  • Molecular Biology
  • Cell Biology

Background:

  • Interleukin 24 (IL-24) is a novel cytokine belonging to the IL-10 family.
  • IL-24 exerts its functions by signaling through heterodimeric receptors: IL-20R1/IL-20R2 and IL-22R1/IL-20R2.
  • Activation of Stat-1 and Stat-3 transcription factors by IL-24 suggests roles in cell survival and proliferation.

Purpose of the Study:

  • To review current knowledge of Interleukin 24 (IL-24) as a cytokine.
  • To emphasize receptor-mediated functions of IL-24, with less focus on non-receptor functions.
  • To discuss the potential roles of IL-24 within complex cytokine networks.

Main Methods:

  • Literature review focusing on IL-24's role as a cytokine.
  • Analysis of IL-24 receptor binding and downstream signaling pathways.
  • Examination of IL-24 expression patterns in different cell types and tissues.

Main Results:

  • IL-24 signals through specific heterodimeric receptors, leading to Stat-1 and Stat-3 activation.
  • Major sources of IL-24 include activated monocytes and T helper 2 cells.
  • Key target tissues for IL-24 are non-haematopoietic, including skin, lung, and reproductive tissues.

Conclusions:

  • IL-24 is a conserved cytokine with significant roles in non-haematopoietic tissues.
  • IL-24's signaling pathway involves transcription factors crucial for cell survival and proliferation.
  • IL-24 may play a role in wound healing, psoriasis, and cancer through complex cytokine interactions.

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