Related Experiment Video

Updated: Aug 8, 2026

Flow Cytometric Analysis of Natural Killer Cell Lytic Activity in Human Whole Blood
08:14

Flow Cytometric Analysis of Natural Killer Cell Lytic Activity in Human Whole Blood

Published on: March 17, 2017

Natural killer cells and natural killer cell activity in chronic fatigue syndrome

T L Whiteside1, D Friberg

  • 1University of Pittsburgh Cancer Institute, Pennsylvania 15213-2582, USA.

The American Journal of Medicine
|October 28, 1998
PubMed

Insights

Chronic fatigue syndrome (CFS) involves immune system issues, particularly low natural killer (NK) cell activity. This review explores NK cell function in CFS, linking them to disease mechanisms and brain interactions.

Area of Science:

  • Immunology
  • Neuroscience
  • Chronic Fatigue Syndrome Research

Background:

  • Chronic fatigue syndrome (CFS) presents persistent, yet difficult-to-reproduce, immunologic abnormalities.
  • Heterogeneity in CFS, variable assay quality, and lack of longitudinal studies hinder understanding of cellular immune deficits.
  • Notably, reduced natural killer (NK) cell activity is frequently reported in CFS patients.

Purpose of the Study:

  • To investigate the mechanisms behind diminished NK cell activity in CFS.
  • To examine the correlation between NK cell activity levels and health or disease states.
  • To present novel findings on NK cell-brain interactions and propose a hypothesis for NK cell involvement in CFS pathogenesis.

Main Methods:

  • Literature review focusing on immunologic assays and cellular immune abnormalities in CFS.
  • Exploration of existing data on NK cell activity and its relationship to disease.
  • Synthesis of new research on NK cell-brain axis interactions.

Main Results:

  • Low NK cell activity is a recurring finding in a significant subset of CFS cases.
  • NK cell activity levels correlate with disease status and overall health.
  • Emerging evidence highlights direct interactions between NK cells and the brain.

Conclusions:

  • NK cells play a crucial role in the immune dysregulation observed in CFS.
  • Understanding NK cell dysfunction offers potential therapeutic targets for CFS.
  • Further research into NK cell-brain pathways is warranted for CFS pathogenesis.

More Related Videos

A Flow Cytometry-Based Cytotoxicity Assay for the Assessment of Human NK Cell Activity06:08

A Flow Cytometry-Based Cytotoxicity Assay for the Assessment of Human NK Cell Activity

Published on: August 9, 2017

Measurement of Natural Killer Cell-Mediated Cytotoxicity and Migration in the Context of Hepatic Tumor Cells06:55

Measurement of Natural Killer Cell-Mediated Cytotoxicity and Migration in the Context of Hepatic Tumor Cells

Published on: February 22, 2020

Related Concept Videos

Cell-mediated Immune Responses01:40

Cell-mediated Immune Responses

Overview
Cells of the Innate Immune Response01:28

Cells of the Innate Immune Response

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.
Phagocytes
Phagocytes police the peripheral tissues by removing cellular debris and responding to the invasion of foreign substances or pathogens. Many phagocytes attack and remove microorganisms even before lymphocytes detect them. The human body has two general...
Immune Surveillance by NK Cells and Phagocytes01:25

Immune Surveillance by NK Cells and Phagocytes

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.
Natural Killer Cells: The Fast Responders
NK cells are large granular lymphocytes found in the blood and lymphatic system. These...
Cytotoxic T Cells-mediated Immune Response01:27

Cytotoxic T Cells-mediated Immune Response

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.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...
Immune Response Against Viral Pathogens01:29

Immune Response Against Viral Pathogens

The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...