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Related Concept Videos

The Tumor Microenvironment02:17

The Tumor Microenvironment

Every normal cell or tissue is embedded in a complex local environment called stroma, consisting of different cell types, a basal membrane, and blood vessels. As normal cells mutate and develop into cancer cells, their local environment also changes to allow cancer progression. The tumor microenvironment (TME) consists of a complex cellular matrix of stromal cells and the developing tumor. The cross-talk between cancer cells and surrounding stromal cells is critical to disrupt normal tissue...
The Tumor Microenvironment02:17

The Tumor Microenvironment

Every normal cell or tissue is embedded in a complex local environment called stroma, consisting of different cell types, a basal membrane, and blood vessels. As normal cells mutate and develop into cancer cells, their local environment also changes to allow cancer progression. The tumor microenvironment (TME) consists of a complex cellular matrix of stromal cells and the developing tumor. The cross-talk between cancer cells and surrounding stromal cells is critical to disrupt normal tissue...
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...
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
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Loss of Tumor Suppressor Gene Functions01:12

Loss of Tumor Suppressor Gene Functions

Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
When the tumor suppressor genes develop mutations or are lost, cells start growing out of control, leading to cancer. However, a single functional copy of the tumor suppressor gene is enough for the cells to maintain their normal functions and cell...
Tumor Immunotherapy01:27

Tumor Immunotherapy

Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.

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Studying the Effects of Tumor-Secreted Paracrine Ligands on Macrophage Activation using Co-Culture with Permeable Membrane Supports
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Tumor microenvironment in NSCLC suppresses NK cells function.

Isabelle Cremer1, Wolf Herman Fridman, Catherine Sautès-Fridman

  • 1Institut National de la Santé et de la Recherche Médicale (INSERM); Centre de Recherche des Cordeliers; Paris, France ; Université Pierre et Marie Curie; Paris, France.

Oncoimmunology
|June 22, 2012
PubMed
Summary
This summary is machine-generated.

Natural killer (NK) cells in Non-Small-Cell Lung Carcinoma show altered function. Their reduced expression of key receptors impairs tumor immunosurveillance and cytotoxic activity.

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Area of Science:

  • Immunology
  • Oncology
  • Cell Biology

Background:

  • Natural killer (NK) cells are crucial for tumor immunosurveillance.
  • NK cells infiltrate the tumor microenvironment of Non-Small-Cell Lung Carcinoma (NSCLC).
  • NK cell function is often compromised within the tumor microenvironment.

Purpose of the Study:

  • To investigate the phenotypic and functional alterations of NK cells in NSCLC.
  • To identify specific molecular defects in NK cells associated with NSCLC.
  • To explore potential mechanisms underlying NK cell dysfunction in NSCLC.

Main Methods:

  • Phenotypic analysis of NK cell surface receptors (NKp30, NKp80, DNAM-1, CD16, ILT2).
  • Assessment of NK cell cytotoxic functions.
  • Analysis of NK cell behavior within the NSCLC tumor microenvironment.

Main Results:

  • NK cells in NSCLC exhibit a significantly altered phenotype.
  • Decreased expression of critical NK cell receptors including NKp30, NKp80, DNAM-1, CD16, and ILT2 was observed.
  • Impaired cytotoxic functions of NK cells were detected in the context of NSCLC.

Conclusions:

  • NK cells in NSCLC are functionally impaired due to altered phenotypes.
  • Reduced expression of key activating and inhibitory receptors contributes to NK cell dysfunction.
  • Understanding these defects is vital for developing immunotherapies for NSCLC.