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Cells of the Innate Immune Response01:28

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The innate immune response is an immediate and non-specific response against pathogens, acting swiftly to prevent the spread of infections. The primary cells involved in this response are phagocytes and natural killer (NK) cells.
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Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
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Immune surveillance is an integral part of the innate immune system, involving the continuous monitoring of peripheral tissues to detect and respond to pathogens, infected cells, or cancerous cells. This surveillance is conducted primarily by natural killer (NK) cells and phagocytes, which employ distinct but complementary mechanisms to identify and eliminate threats.
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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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Measurement of Natural Killer Cell-Mediated Cytotoxicity and Migration in the Context of Hepatic Tumor Cells
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Measurement of Natural Killer Cell-Mediated Cytotoxicity and Migration in the Context of Hepatic Tumor Cells

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Natural Killer Cell Memory.

Timothy E O'Sullivan1, Joseph C Sun2, Lewis L Lanier3

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

Immunity
|October 22, 2015
PubMed
Summary
This summary is machine-generated.

Natural killer (NK) cells, once thought short-lived, now show adaptive immunity traits. This review explores evidence for NK cell memory and its generation mechanisms.

Keywords:
cytomegalovirusimmunological memorynatural killer cells

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Area of Science:

  • Immunology
  • Cell Biology

Background:

  • Natural killer (NK) cells are traditionally viewed as innate immune cells with short lifespans.
  • Their rapid, antigen-independent responses target pathogens and tumors, followed by cell death.

Purpose of the Study:

  • To review the emerging evidence for natural killer (NK) cell immunological memory.
  • To discuss the underlying mechanisms responsible for the generation and survival of memory NK cells.

Main Methods:

  • Literature review of recent studies on NK cell adaptive traits.
  • Analysis of immunological memory mechanisms in innate lymphocytes.

Main Results:

  • NK cells exhibit characteristics of adaptive immunity, including memory formation.
  • Mechanisms for generating and maintaining long-lived memory NK cells are being elucidated.

Conclusions:

  • NK cells possess a capacity for immunological memory, challenging their traditional definition.
  • Understanding NK cell memory is crucial for developing novel immunotherapies.