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The Tumor Microenvironment02:17

The Tumor Microenvironment

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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...
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Lymphoid cells and tissues are integral to the immune system, which is crucial in maintaining our body's defense against harmful pathogens. They form the building blocks of lymphoid organs, which include the spleen, thymus, and lymph nodes.
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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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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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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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Cellular Cosmetics: How Innate Lymphoid Cells Can Recontour the Tumour Microenvironment.

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European Journal of Immunology
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Summary
This summary is machine-generated.

Innate lymphoid cells (ILCs) are crucial for tissue health and inflammation. Understanding their complex roles in cancer immunity is key to developing effective cancer immunotherapies.

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cancer | cytokines | innate lymphoid cells | tumour microenvironment

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Area of Science:

  • Immunology
  • Cancer Biology
  • Cellular Biology

Background:

  • Innate lymphoid cells (ILCs), including natural killer (NK) cells, are increasingly recognized for their roles in tissue homeostasis and inflammation.
  • Over the past 15 years, ILCs have emerged as key regulators of immune responses.
  • Understanding ILCs is critical for advancing cancer immunotherapies, particularly in solid tumors where immunosuppressive mechanisms often hinder T cell responses.

Purpose of the Study:

  • To review the current understanding of ILC contributions to tumor immunity.
  • To highlight the challenges in dissecting ILC functions in the tumor microenvironment.
  • To inform the development of rational immunotherapy combinations targeting ILC-mediated immunosuppression.

Main Methods:

  • Review of existing scientific literature on ILCs in cancer immunity.
  • Analysis of data on ILC subset functions in various tissue contexts.
  • Identification of key immunosuppressive pathways regulated by ILCs.

Main Results:

  • ILCs play dual roles in cancer, exhibiting both pro- and anti-tumorigenic functions depending on the tissue and context.
  • Specific immunosuppressive pathways involving ILCs are being elucidated.
  • ILC composition and function are influenced by local cues within tumors.

Conclusions:

  • ILCs are critical players in tumor immunity, with context-dependent roles.
  • Further research is needed to fully dissect ILC mechanisms in cancer.
  • Targeting ILC-mediated immunosuppression holds promise for improving cancer immunotherapy outcomes.