Nf Kappa B Activity
Nf Kappa B Activity - Related Videos
02:26
NF-κB-dependent Signaling Pathway
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2021
The transcription factor NF-κB was discovered in 1986 in the lab of Nobel laureate Professor David Baltimore, for its interaction with the immunoglobulin light chain enhancer in B-cells. After more than three decades of study, it is now evident that NF-κB regulates the expression of over 100 genes. Most of these genes play an essential role in the innate and adaptive immune responses as well as the inflammatory responses of animals. NF-κB-dependent Signaling Mechanism The heterodimer of NF-κB...
10:57
NF-κB-dependent Luciferase Activation and Quantification of Gene Expression in Salmonella Infected Tissue Culture Cells
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Cited by 4 •
2020
Here, we present a protocol to quickly and easily measure nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) activation in cell lines expressing NF-κB::luciferase reporter constructs, via measurements of luminescence in the cell lysate. Additionally, gene expression is determined via RT-qPCR isolated from cells infected with Salmonella Typhimurium.
14:58
Methods for the Modulation and Analysis of NF-κB-dependent Adult Neurogenesis
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Cited by 1 •
2014
Methods for the manipulation and analysis of NF-κB-dependent adult hippocampal neurogenesis are described. A detailed protocol is presented for a dentate gyrus-dependent behavioral test (termed the spatial pattern separation-Barnes maze) for the investigation of cognitive outcome in mice. This technique should also help enable investigations in other experimental settings.
08:51
Intraductal Injection of LPS as a Mouse Model of Mastitis: Signaling Visualized via an NF-κB Reporter Transgenic
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Cited by 14 •
2012
Described here is a technique in which lipopolysaccharide is injected into the lactating mouse mammary gland via the nipple to simulate mastitis, a condition commonly caused by bacterial infection. Lipopolysaccharide injection results in increased nuclear factor kappa B (NF-κB) signaling, visualized through bioluminescent imaging of an NF-κB luciferase reporter mouse.
09:30
Measurement of Larval Activity in the Drosophila Activity Monitor
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Cited by 10 •
2015
This report describes a method for measuring Drosophila larval activity using the TriKinetics Drosophila Activity Monitor. The device employs infrared beams to detect movements of up to 16 individual animals. Data can be analyzed to represent motion parameters including rates and the positions of the animals within the assay chambers.
FAQs
The IκB kinase step acts as the pathway’s key release mechanism. After stimulation, these kinases promote degradation of IκB proteins, removing the cytoplasmic restraint that keeps NF-kappa B inactive. This sequence converts an external or cellular stress signal into access to the nucleus, allowing subsequent gene regulation. Its timing therefore influences how quickly immune and inflammatory responses begin.
Once in the nucleus, NF-kappa B binds specific DNA sequences and changes transcription of selected genes. The resulting gene-expression changes include inflammatory mediators and immune-response genes, while the broader pathway also relates to cell survival and stress responses. This transcriptional stage connects signaling events to the biological behavior of stimulated cells and provides the basis for interpreting downstream effects.
Microbial components, cytokines, and cellular stress represent different classes of initiating signal. Their shared relevance is that each can engage the signaling sequence leading to IκB kinase activation. Comparing these triggers helps immunologists examine how infection-related inputs and nonmicrobial stress converge on a transcriptional program, while recognizing that the initiating conditions arise from distinct biological contexts.
Cellular location provides a useful way to distinguish inactive from activated states. Association with IκB proteins marks retention in the cytoplasm, whereas movement into the nucleus indicates that NF-kappa B can reach DNA targets. Tracking this transition helps connect upstream signaling to downstream transcription, rather than treating activity as a single, unchanging cellular event.
An investigation can follow the pathway in order: identify the stimulus, examine IκB kinase activation and IκB degradation, determine whether NF-kappa B enters the nucleus, and evaluate DNA binding or changes in transcription. Organizing observations this way helps locate where signaling is altered and separates upstream activation from downstream gene-regulatory effects.
In infection research, NF-kappa B activity provides a framework for linking exposure to microbial components with host gene regulation. Researchers can ask whether signaling proceeds through IκB kinase activation and nuclear access, then examine changes in inflammatory or immune-response genes. This analysis helps explain host responses to infection by connecting an initiating microbial signal with cellular transcriptional outcomes.
Chronic inflammation and immune disorders are important contexts for examining NF-kappa B activity beyond an immediate infection response. Researchers can relate pathway behavior to the expression of inflammatory mediators and immune-response genes, then consider the pathway as a source of therapeutic targets. Following signaling from stimulation to transcription helps frame where altered regulation may influence disease-related responses.