Innate Immunity
Innate Immunity - Related Videos
12:47
Using RNA-interference to Investigate the Innate Immune Response in Mouse Macrophages
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Cited by 8 •
2014
In this protocol, we describe methods to efficiently transfect murine macrophage cell lines with siRNAs using the Amaxa Nucleofector 96-well Shuttle System, stimulate the macrophages with lipopolysaccharide, and monitor the effects on inflammatory cytokine production.
08:32
Dissecting Innate Immune Signaling in Viral Evasion of Cytokine Production
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Cited by 2 •
2014
We describe a protocol to measure the antiviral cytokine production in mice infected with a model herpesvirus, murine gamma herpesvirus 68 (γHV68) that is closely-related to human Kaposi’s sarcoma-associated herpesvirus (KSHV) and Epstein-Barr virus (EBV). Utilizing genetically modified mouse strains and mouse embryonic fibroblasts (MEFs), we assessed the antiviral cytokine production both in vivo and ex vivo. “Reconstituting” the expression of innate immune components in knockout embryonic...
07:07
Quantification of the Respiratory Burst Response as an Indicator of Innate Immune Health in Zebrafish
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Cited by 16 •
2013
The innate immune response protects organisms against pathogen infection. A critical component of the innate immune response, the phagocyte respiratory burst, generates reactive oxygen species that kill invading microorganisms. We describe a respiratory burst assay that quantifies reactive oxygen species produced when the innate immune response is chemically induced.
01:21
Introduction to Innate and Adaptive Immunity
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2024
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,...
01:28
Cells of the Innate Immune Response
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2024
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...
FAQs
Pattern-recognition receptors detect conserved molecular patterns associated with microbes or tissue injury. This recognition activates signaling pathways that promote inflammation and can engage complement, while also recruiting or activating immune cells. Because these receptors respond to shared features rather than highly specific pathogen identities, they allow the host to react rapidly across many potential infections.
Complement activation and phagocytosis represent complementary parts of the response. Complement is a soluble factor, whereas phagocytosis engages immune cells. Together, they contribute to containing microbes, while associated cellular activity can also help remove damaged cells. Examining both therefore helps researchers distinguish soluble and cellular contributions to early host defense.
Neutrophils, macrophages, natural killer cells, and other innate immune components contribute to early defense by helping contain microbes, remove damaged cells, and communicate with the broader immune response. Their combined activity links immediate containment with signaling that can influence adaptive immunity. Studying these components together is therefore more informative than treating innate defense as a single-cell process.
Innate immunity acts before pathogen-specific responses develop and recognizes shared molecular patterns rather than relying only on a response tailored to one pathogen. This gives it broad early coverage, whereas adaptive immunity is associated here with later pathogen-specific responses. The two are not isolated: innate signaling helps signal adaptive immune responses.
A biology investigation can follow the response from initial microbial contact or tissue injury through pattern recognition, inflammatory signaling, complement activation, and phagocytosis. Researchers can then examine how neutrophils, macrophages, natural killer cells, and other components contain microbes or remove damaged cells, as well as how signaling toward adaptive immunity changes.
Infectious-disease studies use innate immunity to analyze host-pathogen interactions and the earliest defenses against microbes. The same framework supports research on inflammation, vaccines, autoimmune disorders, and therapies designed to modulate immune activity. Its value extends beyond cataloging immune components by connecting recognition and effector responses with disease processes and potential interventions.