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Related Concept Videos

The Extrinsic Apoptotic Pathway01:17

The Extrinsic Apoptotic Pathway

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The extrinsic apoptotic pathway is initiated when extracellular death-inducing signals, such as specific cytokines, activate the death receptors expressed on the cell surface. The immune cells involved in this pathway are natural killer cells (NK cells) and cytotoxic T-lymphocytes. NK cells are critical in innate immune response, while cytotoxic T-lymphocytes are associated with adaptive immune response. These cells recognize specific receptors expressed on the altered cells and activate...
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The Intrinsic Apoptotic Pathway01:31

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Internal cellular stress, such as cellular injury or hypoxia, triggers intrinsic apoptosis. The B-cell lymphoma 2 (Bcl-2) family of proteins are the primary regulators of the intrinsic apoptotic pathway. For example, during DNA damage, checkpoint proteins, such as Ataxia Telangiectasia Mutated (ATM protein) and Checkpoints Factor-2 (Chk2) proteins, are activated. These proteins phosphorylate p53 which further activates pro-apoptotic proteins, such as Bax, Bak, PUMA, and Noxa, and inhibits...
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Phagocytosis of Apoptotic Cells01:17

Phagocytosis of Apoptotic Cells

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Cells undergoing apoptosis form apoptotic bodies that must be removed immediately to prevent inflammation, autoimmune diseases, and necrosis. Phagocytosis is carried out by professional phagocytes such as macrophages or  immature dendritic cells. Non-professional phagocytes such as  epithelial cells and fibroblasts also take part in this process; however, they are not as effective as professional phagocytes. 
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NF-κB-dependent Signaling Pathway02:26

NF-κB-dependent Signaling Pathway

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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
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T Cell Types and Functions01:24

T Cell Types and Functions

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When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
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Caspases01:24

Caspases

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Caspase, a family of cysteine proteases, serve as effectors in apoptosis. The ced3 gene in C.elegans was first identified to be involved in apoptosis. This gene encodes the ced-3 caspase that is similar to the interleukin-1-beta converting enzyme or ICE in mammals. In addition to apoptosis, caspases also function in the inflammatory response. Inflammatory caspases are essential in activating pro-inflammatory cytokines that recruit immune cells and block the replication of pathogens inside...
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Related Experiment Video

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Activation and Measurement of NLRP3 Inflammasome Activity Using IL-1&#946; in Human Monocyte-derived Dendritic Cells
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Assessing Interleukin-1β Activation During Pyroptosis.

Doris L LaRock1, Christopher N LaRock2

  • 1Department of Microbiology and Immunology, and Department of Medicine, Division of Infectious Diseases, Emory School of Medicine, Atlanta, GA, USA.

Methods in Molecular Biology (Clifton, N.J.)
|April 19, 2023
PubMed
Summary
This summary is machine-generated.

Accurately measuring interleukin-1β (IL-1β) activation is crucial for understanding inflammation. This chapter details methods and controls for sensitive IL-1β measurement in biological samples.

Keywords:
IL-1βInflammasomeInflammationInterleukin-1βProteolytic activationPyroptosis

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Accurate and Simple Measurement of the Pro-inflammatory Cytokine IL-1&#946; using a Whole Blood Stimulation Assay
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Accurate and Simple Measurement of the Pro-inflammatory Cytokine IL-1β using a Whole Blood Stimulation Assay

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Area of Science:

  • Immunology
  • Molecular Biology
  • Biochemistry

Background:

  • Interleukin-1β (IL-1β) is a key inflammatory mediator in autoinflammatory diseases and infection responses.
  • IL-1β requires proteolytic cleavage for activation, a process primarily mediated by inflammasome-activated caspases, but also by other proteases.
  • Diverse post-translational modifications and resulting IL-1β forms complicate activation assessment.

Purpose of the Study:

  • To provide detailed methodologies for accurately measuring IL-1β activation.
  • To highlight essential controls for sensitive and reliable IL-1β quantification.
  • To address challenges in evaluating IL-1β activation due to its complex post-translational regulation.

Main Methods:

  • Describes established and novel techniques for detecting active IL-1β forms.
  • Emphasizes the importance of rigorous experimental controls in IL-1β assays.
  • Covers methods applicable to various biological sample types.

Main Results:

  • Provides a framework for reproducible IL-1β activation studies.
  • Ensures sensitive detection of IL-1β processing.
  • Facilitates differentiation between various active IL-1β species.

Conclusions:

  • Accurate measurement of IL-1β activation is critical for research and diagnostics.
  • Standardized methods and controls are essential for reliable IL-1β evaluation.
  • This chapter serves as a guide for researchers studying IL-1β-mediated inflammation.