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Related Concept Videos

Immune Response Against Viral Pathogens01:29

Immune Response Against Viral Pathogens

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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.
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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...
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Immune Surveillance by NK Cells and Phagocytes01:25

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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.
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NK cells are large granular lymphocytes found in the blood and lymphatic system. These...
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Cytotoxic T Cells-mediated Immune Response01:27

Cytotoxic T Cells-mediated Immune Response

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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...
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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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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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Antigen Presenting Cells01:22

Antigen Presenting Cells

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The immune system is a complex network of cells and molecules that protects the body from foreign invaders. T cells, a type of white blood cell, play a crucial role in this process. They recognize and attack foreign substances, such as pathogens, that enter the body.
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Antigens Involved in Adaptive Immunity01:26

Antigens Involved in Adaptive Immunity

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An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
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Detection of Fluorescent Nanoparticle Interactions with Primary Immune Cell Subpopulations by Flow Cytometry
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Detection of Fluorescent Nanoparticle Interactions with Primary Immune Cell Subpopulations by Flow Cytometry

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Nanoparticle interaction with the immune system.

Veno Kononenko, Mojca Narat, Damjana Drobne

    Arhiv Za Higijenu Rada I Toksikologiju
    |June 26, 2015
    PubMed
    Summary

    Nanoparticles interacting with immune cells can cause toxic effects or immune suppression. Future research must examine how nanoparticle properties affect these interactions for safe application.

    Area of Science:

    • Immunology and Nanotechnology

    Background:

    • Nanoparticle interactions with biological systems are common and can lead to unintended immune responses.
    • These interactions may result in toxic effects, increased susceptibility to diseases, and altered immune function.
    • Studies show nanoparticles can stimulate or suppress immune responses, acting as adjuvants or haptens.

    Purpose of the Study:

    • To review in vitro and in vivo research on nanoparticle effects on mammalian immune systems.
    • To highlight the dual nature of nanoparticle-immune interactions, including stimulatory and suppressive effects.

    Main Methods:

    • Review of existing scientific literature on nanoparticle-immune system interactions.
    • Analysis of in vitro and in vivo studies.

    Main Results:

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    • Nanoparticles can elicit inflammatory, allergic, or complement system activation.
    • Evidence suggests both stimulatory (adjuvant/hapten) and suppressive effects on the immune system.
    • Physical and chemical properties of nanoparticles significantly influence their biological behavior.

    Conclusions:

    • Nanoparticle-immune system interactions are complex, with varied outcomes.
    • Understanding how nanoparticle properties dictate immune response is crucial for safe use.
    • Further research is needed to elucidate these property-dependent interactions and their impact on experimental assays.