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NK cell development and function--plasticity and redundancy unleashed.

Frank Cichocki1, Ewa Sitnicka2, Yenan T Bryceson3

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Summary

Natural killer (NK) cells are crucial cytotoxic lymphocytes providing innate immunity against infections and cancer. This review highlights the genetic factors and environmental influences shaping NK cell development, function, and plasticity.

Keywords:
Cytokine productionCytotoxicityNatural killer cellsPrimary immunodeficiencySingle nucleotide polymorphismsTranscription factors

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Area of Science:

  • Immunology
  • Cell Biology
  • Genetics

Background:

  • Natural killer (NK) cells are key cytotoxic lymphocytes in innate immunity.
  • They are vital for defense against intracellular infections and malignancy.
  • NK cells also play roles in tissue homeostasis, remodeling, and vascularization.

Purpose of the Study:

  • To review pathways of NK cell lineage commitment and differentiation.
  • To discuss genetic determinants and environmental influences on NK cell specialization.
  • To highlight the genetic framework, plasticity, and redundancy in NK cell function.

Main Methods:

  • Literature review of NK cell development, differentiation, and function.
  • Analysis of genetic determinants from model organisms and disease associations.
  • Examination of environmental and inflammatory stimuli shaping NK cell subsets.

Main Results:

  • NK cell specialization is evident across distinct tissues and infection states.
  • Specific genes are critical for NK cell development, differentiation, and function.
  • Cellular redundancies contribute to robust NK cell immunological function.

Conclusions:

  • NK cell development and function are constrained by a genetic framework.
  • Environmental stimuli and inherent plasticity shape NK cell subsets.
  • Built-in redundancy underscores the critical importance of NK cells in immunity.