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Related Experiment Videos

Conservation of structure and function between human and murine IL-16

J Keane1, J Nicoll, S Kim

  • 1The Pulmonary Center, Boston University School of Medicine, MA 02118, USA.

Journal of Immunology (Baltimore, Md. : 1950)
|June 24, 1998
PubMed
Summary

Interleukin-16 (IL-16) shows high structural and functional similarity between mice and humans. The C-terminal region is crucial for IL-16

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Area of Science:

  • Immunology and Molecular Biology
  • Cytokine Research

Background:

  • Interleukin-16 (IL-16) is a proinflammatory cytokine involved in immune responses.
  • Understanding conserved regions of IL-16 is key to identifying functional domains.

Purpose of the Study:

  • To compare murine and human IL-16 homologs for conserved structures and functions.
  • To identify critical regions of IL-16 responsible for its biological activity.

Main Methods:

  • Cloning of murine IL-16 cDNA and comparison of amino acid sequences with human IL-16.
  • Cross-species chemotaxis assays using murine and human cells.
  • Synthesis of oligopeptides and anti-peptide antibodies targeting predicted IL-16 domains.

Main Results:

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  • High amino acid similarity between murine and human pro-IL-16, particularly in the C-terminal region.
  • Cross-species chemotaxis stimulation observed with both murine and human IL-16.
  • A C-terminal peptide inhibited IL-16 binding and chemoattractant activity.

    • Conclusions:

    • Murine and human IL-16 share significant structural and functional conservation.
    • The C-terminal domain of IL-16 is critical for its chemoattractant function.
    • Conserved IL-16 receptor structures are suggested, with potential therapeutic applications for inhibitory peptides.