Related Experiment Video

Updated: Jun 1, 2026

Measurement of Natural Killer Cell-Mediated Cytotoxicity and Migration in the Context of Hepatic Tumor Cells
06:55

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

Published on: February 22, 2020

Association between natural killer cells and regression in melanocytic lesions

Kristopher McKay1, Page C Moore, Bruce R Smoller

  • 1Department of Pathology, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA. KMcKay002@hotmail.com

Human Pathology
|June 17, 2011
PubMed

Insights

Natural killer (NK) cells may play a key role in melanoma regression. Studies show increased NK cell activity in regressing melanomas and nevi, suggesting their involvement in tumor clearance.

Area of Science:

  • Immunology
  • Dermatology
  • Oncology

Background:

  • Melanoma mortality is rising, yet some melanomas spontaneously regress.
  • In vitro studies suggest natural killer (NK) cells may mediate this regression.
  • Understanding the role of immune cells in melanoma regression is crucial for developing new therapies.

Purpose of the Study:

  • To investigate the preferential involvement of NK cells in the cytotoxic response within regressing skin lesions.
  • To compare immune cell infiltrates in regressing nevi, non-regressing melanomas, and regressing melanomas.

Main Methods:

  • Analysis of 42 cases including nevi with regression, non-regressing melanoma with inflammation, and regressing melanoma.
  • Immunohistochemical staining for CD8, CD56, and T-cell intracytoplasmic antigen 1 (TIA-1).
  • Quantification of total lymphocytes, CD8+, and TIA-1+ lymphocytes, and assessment of CD56+ lymphocyte distribution.

Main Results:

  • No significant differences in total, CD8+, or TIA-1+ lymphocytes were observed among the groups.
  • CD56 (NK cell marker) positivity was significantly higher in regressing melanomas and nevi compared to non-regressing melanomas.
  • CD56+ lymphocytes were predominantly found in areas of early regression.

Conclusions:

  • Natural killer cells show preferential activity in regressing melanoma and nevi.
  • NK cells are likely involved as cytotoxic effector cells or mediators in the regression of skin lesions.
  • These findings support a potential therapeutic role for NK cells in managing melanoma.

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

Related Concept Videos

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...
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 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...
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...