Receptor Antigen Complexes
Receptor Antigen Complexes - Related Videos
04:38
An Ex Vivo Technique to Manufacture Chimeric Antigen Receptor T Cells
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2025
This video demonstrates a technique to manufacture chimeric antigen receptor (CAR) T cells ex vivo. Human T cells are incubated with magnetic beads coated with anti-CD3 and anti-CD28 antibodies, along with a medium supplemented with interleukin-2 (IL-2), leading to T cell activation and proliferation. Transgenic lentiviral vectors are introduced, allowing the transgenic RNA to integrate into the host genome and express the transgene. This results in the transduced T cells expressing chimeric...
02:48
Fluorescence-Based Assay for Investigating Macrophage Receptor Interactions with Bacterial Antigens
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2026
Source: Barbero, A. M., et.al. Fluorescence Assays for the Study of Mycobacterium tuberculosis Interaction with the Immune Receptor SLAMF1. J. Vis. Exp. ( (2025)This video demonstrates a fluorescence-based assay to study the interaction between a macrophage receptor and Mycobacterium tuberculosis antigens. Fluorescently labeled antigens on a coverslip are incubated with macrophage protein extracts, cross-linked, antibody-labeled, and visualized by overlapping fluorescence signals.
01:28
Diversity of Antigen Receptors
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2024
Antigen receptors are essential components of the immune system crucial in defending the body against foreign invaders. These receptors are present on the surface of B and T cells, enabling them to recognize antigens and mount an appropriate immune response. Before encountering any antigen, lymphocytes express these receptors. On B cells, the antigen receptor is a membrane-bound antibody molecule called BCR; on T cells, it is a T cell receptor or TCR. B and T cell receptors are composed of two...
08:48
Generating De Novo Antigen-specific Human T Cell Receptors by Retroviral Transduction of Centric Hemichain
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Cited by 3 •
2016
Herein we describe a novel method to generate antigen-specific T cell receptors (TCRs) by pairing the TCRα or TCRβ of an existing TCR, possessing the antigen-specificity of interest, with complementary hemichain of the peripheral T cell receptor repertoire. The de novo generated TCRs retain antigen-specificity with varying affinity.
04:42
An Ex Vivo Technique to Generate Tumor-Specific Chimeric Antigen Receptor T Cells
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2025
This video demonstrates a technique for the ex vivo generation of tumor antigen-specific chimeric antigen receptor (CAR) T cells. Retroviral vectors carrying transgenic RNA are mixed with spleen cells in a medium supplemented with interleukin-2 to promote T-cell survival and proliferation. The mixture is then transferred to a plate coated with recombinant human fibronectin fragments and centrifuged to facilitate the fusion of the virus with the cell, allowing the RNA to integrate into the host...
FAQs
Selective recognition depends on how closely the chemical surfaces of the receptor and antigen complement one another. Their association is stabilized by noncovalent interactions, so differences in surface compatibility can influence which molecular partners bind. This molecular matching provides a basis for immune specificity and helps explain why immune receptors distinguish particular targets rather than responding uniformly.
B-cell membrane immunoglobulin can recognize an antigen in its intact form, allowing the receptor to bind the antigen’s existing molecular surface. T-cell receptors follow a different recognition pattern: they detect peptide fragments only when those fragments are displayed by major histocompatibility complex molecules. This distinction separates two important routes of antigen detection in Biology.
Binding can reorganize the receptor system by promoting receptor clustering or causing a conformational change. These structural or spatial alterations can engage associated proteins and initiate phosphorylation cascades, in which phosphate-group transfer helps pass information through the signaling pathway. The result is conversion of an extracellular recognition event into intracellular signals associated with immune-cell activation.
Structural analysis can clarify how receptor and antigen surfaces are positioned relative to one another and how their molecular contact supports recognition. It can also provide a framework for examining the receptor arrangements associated with binding. These insights support interpretation of immune specificity and guide the design of targeted immunotherapies that focus on particular molecular interactions.
Their selective molecular interactions provide a basis for antibody-based diagnostics and therapeutics. In diagnostics, recognition can help identify a particular antigen through a specific binding event. In therapy, understanding the interaction can support development of antibodies directed toward chosen molecular targets. The same specificity that enables detection therefore also informs targeted intervention.
Research on receptor-antigen interactions helps connect molecular recognition with immune specificity, activation, tolerance, and vaccine responses. Comparing how receptors engage antigens can show how selective detection relates to downstream immune behavior and controlled responsiveness. This context is useful in Biology because it links molecular assemblies to broader questions about how immune responses are initiated, maintained, or shaped.