Related Experiment Video
Updated: Aug 8, 2026
08:17
Flow Cytometry-based Assay for the Monitoring of NK Cell Functions
Published on: October 30, 2016
Natural killer cells and natural killer T cells
1Department of Veterans Affairs Medical Center, and University of California, San Francisco, USA.
Arthritis and Rheumatism
|June 17, 2000
Summary
Natural killer (NK) cells protect against viruses and regulate immune responses. Research is uncovering the molecular mechanisms behind NK cell activation and their role in autoimmunity and transplantation.
Area of Science:
- Immunology
- Cellular Biology
Background:
- Natural killer (NK) cells are crucial for innate immunity, particularly against viral infections.
- NK cells play roles in transplantation barriers and immune regulation, with potential involvement in autoimmunity.
- Their presence in the uterine decidua suggests a role in pregnancy, yet to be fully elucidated.
Purpose of the Study:
- To explore the multifaceted roles of NK cells in immune responses.
- To understand the molecular mechanisms governing NK cell activation and regulation.
- To investigate the involvement of NK cells in viral infections, transplantation, pregnancy, and autoimmunity.
Main Methods:
- Analysis of NK cell interactions with hematopoietic blasts.
- Investigation of inhibitory receptor function in NK cell recognition of self MHC antigens.
- Review of existing evidence on NK cell roles in autoimmunity and pregnancy.
Main Results:
- NK cells are activated by hematopoietic blasts, presenting a challenge for bone marrow transplantation.
- Inhibitory receptors recognizing self MHC class I antigens normally prevent NK cell responses against host cells.
- Evidence suggests NK cells, and particularly NKT cells, are involved in regulating autoimmunity.
Conclusions:
- NK cell functions are diverse, spanning antiviral defense, immune regulation, and potential roles in transplantation and autoimmunity.
- Understanding NK cell activation and regulatory mechanisms at the molecular level is advancing.
- Further research is needed to clarify the precise role of NK cells in pregnancy and autoimmune diseases.
Related Concept Videos
01:40Cell-mediated Immune Responses
Overview
01:28Cells 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...
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...
01:25Immune 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...
Natural Killer Cells: The Fast Responders
NK cells are large granular lymphocytes found in the blood and lymphatic system. These...
01:24T Cell Types and Functions
When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
01:27Cytotoxic 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...
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...
01:29Immune 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...
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...