Antigen Recognition
Antigen Recognition - Related Videos
11:55
Physiological Correlates of Emotion Recognition
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2023
Source: Laboratories of Jonas T. Kaplan and Sarah I. Gimbel—University of Southern California The autonomic nervous system (ANS) controls the activity of the body's internal organs and regulates changes in their activity depending on the current environment. The vagus nerve, which innervates many of the internal organs, is an important part of the system. When our brain senses danger, vagal tone is inhibited, leading to a set of changes in the body designed to make us more prepared to fight or...
02:41
B Cell Activation on an Antigen-Coated Coverslip
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2025
This video demonstrates B cell activation in vitro. The process involves antigen interaction with B cell receptors, leading to cytoskeleton remodeling, immune synapse formation, lysosome movement, antigen internalization, processing, and subsequent presentation on MHC molecules for B cell activation.
01:22
Revenue Recognition
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2025
The revenue recognition principle is a central guideline in accrual accounting that dictates when revenue should be recorded in financial statements. It requires that revenue be recognized when a company satisfies a performance obligation, meaning when it has delivered goods or completed services as agreed in a contract, regardless of when the customer pays. This principle ensures that income is reported in the accounting period in which it is actually earned, providing a more accurate...
01:27
Expense Recognition
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2025
An expense represents the outflow of economic resources a business uses to generate revenue, encompassing costs such as labor, materials, and services. In accrual accounting, the recording of these costs follows the expense recognition principle, which requires that expenses be recognized in the same accounting period as the related revenues. This alignment ensures that financial statements accurately reflect a business's economic activity during a specific period rather than simply tracking...
06:57
Development of an Antigen-driven Colitis Model to Study Presentation of Antigens by Antigen Presenting Cells to T Cells
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Cited by 9 •
2016
In this antigen-driven colitis model, OT-II CD4+ T cells expressing a red fluorescent protein were adoptively transferred into RAG-/- mice that express a green fluorescent protein in mononuclear phagocytes (MPs). The hosts were challenged with Escherichia coli (E.coli) expressing the ovalbumin protein (OVA) fused to a cyan fluorescent protein (CFP).
FAQs
B cells can bind exposed epitopes directly through membrane-bound antibodies. T cells require peptide fragments to be displayed by major histocompatibility complex molecules before their T-cell receptors can recognize them. This distinction determines how each lymphocyte encounters antigen and helps explain why B-cell and T-cell responses contribute differently to immune activation.
Epitopes are the specific molecular features that immune receptors recognize, rather than the entire foreign or altered substance as a single undifferentiated target. Their selective binding determines whether a B-cell antibody or a T-cell receptor can engage the antigen. Epitope-focused recognition therefore provides the molecular basis for specificity in immune responses.
Recognition initiates signaling inside the responding lymphocyte. Depending on the cell and recognition pathway, this activation can promote antibody production, recruit cellular defenses, or support broader immune activity. The consequence is therefore not limited to binding itself: receptor engagement converts molecular recognition into coordinated biological actions directed toward a potential threat.
Selective receptor binding helps immune cells distinguish molecular features associated with foreign or altered substances from those found in healthy tissues. This discrimination is essential because it directs activation toward potential threats while limiting inappropriate responses. When recognition is studied in relation to autoimmunity or allergy, the specificity and consequences of these interactions become especially important.
A study generally focuses on presenting an antigen or its relevant molecular feature to immune cells, examining receptor binding or recognition, and then evaluating the resulting signaling or cellular response. The chosen design depends on whether the investigation concerns direct B-cell binding, peptide presentation to T cells, antibody production, or cellular defense recruitment.
Antigen recognition research contributes to vaccine development, infectious disease investigation, allergy and autoimmunity studies, diagnostic test design, and targeted immunotherapy. In each setting, researchers examine how selective molecular interactions can identify a relevant target and initiate measurable immune consequences. This makes recognition a connecting principle across basic biology and applied immunology.
By identifying which molecular features can engage immune receptors and trigger useful signaling, researchers can investigate targets for vaccines or targeted immunotherapies. The relevant outcome may include antibody production or recruitment of cellular defenses. Recognition studies therefore help connect molecular selectivity with the design of interventions intended to direct immune activity toward chosen targets.
Possible outcomes include lymphocyte activation, antibody production, signaling responses, and recruitment of cellular defenses. The measured result should match the recognition pathway under study: direct binding is especially relevant to B-cell interactions, whereas peptide display and T-cell receptor engagement are central when examining T-cell responses. These outcomes reveal how recognition shapes immunity.