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The Fyn-ADAP Axis: Cytotoxicity Versus Cytokine Production in Killer Cells

Zachary J Gerbec1, Monica S Thakar2, Subramaniam Malarkannan3

  • 1Laboratory of Molecular Immunology and Immunotherapy, Blood Research Institute, Medical College of Wisconsin , Milwaukee, WI , USA ; Department of Microbiology, Immunology and Molecular Genetics, Medical College of Wisconsin , Milwaukee, WI , USA.

Frontiers in Immunology
|October 7, 2015
PubMed

Insights

Understanding lymphocyte signaling is key for controlling immune responses and developing cancer immunotherapies. The Fyn signaling axis differentially regulates cytotoxicity and cytokine production in T and NK cells.

Area of Science:

  • Immunology
  • Cellular Signaling
  • Molecular Biology

Background:

  • Lymphocyte signaling cascades regulate anti-tumor immunity and inflammatory responses.
  • Dysregulation leads to immune suppression (e.g., tumor microenvironment) and autoimmunity.
  • Understanding distinct signaling pathways is critical for immunotherapy and disease progression.

Purpose of the Study:

  • To elucidate divergent signaling pathways controlling T and NK cell effector functions.
  • To explore the role of the Fyn signaling axis in differential regulation of cytotoxicity and cytokine production.
  • To provide a model for understanding clinically relevant lymphocyte signaling through mechanistic and structural approaches.

Main Methods:

  • Review of existing literature on lymphocyte activation and signaling pathways.
  • Analysis of the Fyn signaling axis, including Fyn-PI(3)K and Fyn-ADAP pathways.
  • Discussion of structural and mechanistic insights into Fyn function in lymphocytes.

Main Results:

  • The Fyn signaling axis acts as a branch point for killer cell effector functions.
  • Fyn-PI(3)K pathway influences cytotoxicity, cell development, and cytokine production.
  • Fyn-ADAP pathway preferentially regulates cytokine production in NK and T cells.

Conclusions:

  • Differential regulation of lymphocyte effector functions (cytotoxicity and cytokine production) is mediated by distinct signaling pathways.
  • The Fyn signaling axis provides a model for understanding this differential regulation.
  • Mechanistic and structural studies of Fyn can advance the understanding of lymphocyte signaling in disease and immunotherapy.
Keywords:
ADAPFynSFKsignalingstructure–activity relationship

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