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Cells of the Adaptive Immune Response01:23

Cells of the Adaptive Immune Response

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The T and B lymphocytes of the adaptive immune system develop from common lymphoid progenitor cells in the bone marrow. These progenitors give rise to precursors that eventually develop into both T and B lymphocytes. As these precursors mature, they gain the ability to detect and respond to foreign antigens in the body, a process known as immunocompetence. Additionally, these precursors acquire self-tolerance, a process that ensures they do not react to self-antigens. This intricate system...
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The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
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Immunological memory, a pivotal pillar of the adaptive immune system, is responsible for the body's ability to remember and respond more swiftly and effectively to previously encountered pathogens. This remarkable feature is what makes vaccines so effective in preventing diseases.
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NK Cell Responses Redefine Immunological Memory.

Nicholas M Adams1, Timothy E O'Sullivan1, Clair D Geary1

  • 1Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065.

Journal of Immunology (Baltimore, Md. : 1950)
|November 9, 2016
PubMed
Summary
This summary is machine-generated.

Natural killer (NK) cells show adaptive immune memory, challenging the traditional view. This review explores the requirements for generating memory NK cells and identifies memory precursor NK cells.

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Area of Science:

  • Immunology
  • Cellular Biology

Background:

  • Immunological memory was historically considered exclusive to adaptive immunity.
  • Emerging evidence suggests memory phenomena exist in organisms lacking adaptive immune systems.
  • Natural killer (NK) cells, part of innate immunity, display characteristics previously attributed only to adaptive immune cells.

Purpose of the Study:

  • To review the intracellular and extracellular factors essential for memory NK cell formation.
  • To discuss the emerging concept of memory precursor NK cells and their origins.

Main Methods:

  • Literature review of immunological memory.
  • Analysis of NK cell characteristics and functions.
  • Synthesis of evidence for adaptive traits in NK cells.

Main Results:

  • NK cells exhibit adaptive features including clonal expansion, longevity, self-renewal, and recall responses.
  • Specific intracellular and extracellular requirements for memory NK cell generation are being elucidated.
  • Evidence points to the existence of memory precursor NK cells.

Conclusions:

  • NK cells possess adaptive immunological memory, blurring the lines between innate and adaptive immunity.
  • Understanding memory NK cell generation is crucial for developing novel immunotherapies.
  • The identification of memory precursor NK cells opens new avenues for research in immune memory.