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Related Concept Videos

Introduction to Innate and Adaptive Immunity01:21

Introduction to Innate and Adaptive Immunity

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The human immune system is a complex defense mechanism that protects the body from harmful pathogens and foreign substances. It comprises two crucial components: innate and adaptive immunity.
Innate immunity is the body's natural, nonspecific defense system that acts quickly to protect against pathogens. It incorporates physical barriers like skin and mucous membranes and cellular elements such as phagocytes and natural killer cells. This part of our immune system provides an immediate,...
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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.
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...
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Introduction to Lymphatic and Immune System01:22

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Immunity is a crucial biological concept about our body's inherent capacity to prevent infections and diseases. A complex network of cells and tissues collectively known as the immune system facilitates this natural defense mechanism. The immune system plays an integral role in maintaining our health and well-being, shielding us from potential health threats.
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Cell-mediated Immune Responses01:40

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Functions of the Lymphatic and Immune System01:28

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The lymphatic system plays a crucial role in bolstering our immune system. It consists of a network of lymphoid organs, lymph, and lymphatic vessels that provide structural and functional support in safeguarding the body against pathogens such as viruses and bacteria.
The primary lymphoid organs, including the bone marrow and the thymus, serve as the maturation sites for lymphocytes. Secondary lymphoid organs, like the mucosa-associated lymphoid tissue, activate these lymphocytes and serve as...
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T Cells Capture Bacteria by Transinfection from Dendritic Cells
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The innate immune system: A double-edged sword.

Ditte S Andersen1, Julien Colombani1

  • 1Department of Biology, University of Copenhagen, Copenhagen, Denmark.

Plos Biology
|April 29, 2025
PubMed
Summary

Premalignant cells hijack innate immunity signaling pathways, specifically Toll-NF-κB, alongside oncogenic Ras mutations. This exploitation drives unchecked cellular growth, contributing to tumor progression.

Area of Science:

  • Immunology
  • Oncology
  • Cell Biology

Background:

  • Innate immunity acts as a critical defense mechanism against pathogens and cellular abnormalities.
  • Dysregulation of innate immune pathways can contribute to disease development, including cancer.
  • Oncogenic mutations, such as those in Ras, are key drivers of cellular transformation and tumor formation.

Purpose of the Study:

  • To investigate how premalignant cells exploit innate immune signaling for tumor progression.
  • To elucidate the role of Toll-NF-κB signaling in conjunction with oncogenic Ras in promoting uncontrolled cell growth.
  • To identify potential therapeutic targets by understanding the interplay between immunity and cancer initiation.

Main Methods:

  • Utilized genetic models to study premalignant cell behavior.

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  • Analyzed the activation of Toll-NF-κB signaling pathways in the context of oncogenic Ras.
  • Assessed the impact of these signaling events on cell proliferation and tumor development.

    • Main Results:

    • Demonstrated that premalignant cells can exploit the Toll-NF-κB signaling pathway.
    • Showcased the synergistic effect of Toll-NF-κB activation and oncogenic Ras in driving unchecked cell growth.
    • Provided evidence for the subversion of innate immunity in early stages of tumorigenesis.

    Conclusions:

    • Premalignant cells actively manipulate innate immune pathways to promote their own survival and proliferation.
    • The combined action of Toll-NF-κB signaling and oncogenic Ras is a critical mechanism enabling tumor initiation.
    • Targeting these immune-cancer crosstalk pathways may offer novel strategies for cancer prevention and treatment.