Bacterial Antigen Adsorption
Bacterial Antigen Adsorption - Related Videos
07:42
Spore Adsorption as a Nonrecombinant Display System for Enzymes and Antigens
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This protocol focuses on the use of bacterial spores as a "live" nanobiotechnological tool to adsorb heterologous molecules with various biological activities. The methods to measure the efficiency of adsorption are also shown.
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Fluorescence-Based Assay for Investigating Macrophage Receptor Interactions with Bacterial Antigens
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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.
07:18
Experimental System of Solar Adsorption Refrigeration with Concentrated Collector
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With solar energy as the driving force, a novel adsorption refrigeration system has been developed and experimentally investigated. Water vapor and zeolite formed the working pair of the adsorption system. This manuscript describes the setup of the experimental rig, the operation procedure, and the important results.
03:52
Subcutaneous Injection of Bacterial Antigen to Induce Systemic Inflammation in a Murine Model
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This video demonstrates the induction of systemic inflammation in an anesthetized mouse. The injection of mycobacterial antigen-adjuvant depots triggers cytokine release and localized inflammation. Lymphatic vessels open, enabling immune cell entry into lymph nodes and activation of T cells, which release pro-inflammatory cytokines, leading to widespread inflammation.
02:44
Western Blot for Assessing the Structural Integrity of a Bacterial Vaccine Antigen
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Source: Gilmore, S. F. et al. Cell-Free Scaled Production and Adjuvant Addition to a Recombinant Major Outer Membrane Protein from Chlamydia muridarum for Vaccine Development. J. Vis. Exp. (2022)This video demonstrates the use of Western blotting to evaluate the structural integrity of the major outer membrane protein (MOMP) within nanoparticle-based vaccine complexes. It outlines the key steps involved in protein transfer, antibody labeling, and fluorescence imaging.
FAQs
pH and ionic strength can shift the balance of forces that hold an antigen on an insoluble surface. Changes in pH may alter electrostatic attraction, while ionic strength can influence those charge-based interactions and other noncovalent associations. Examining these variables helps identify binding conditions that support stable, reproducible adsorption.
Several interactions may contribute simultaneously, including electrostatic attraction, ligand exchange, and hydrophobic interactions. Their relative contribution depends on the antigen, the adjuvant particle, and the surrounding binding conditions. Recognizing this combination matters because adsorption is not governed by a single universal mechanism, so formulation conditions must be evaluated rather than assumed.
Adsorption capacity describes how effectively an insoluble material can associate with the available bacterial antigen under specified conditions. Characterizing it helps researchers compare formulations, control the amount of antigen associated with an adjuvant, and identify conditions that promote consistency. This information supports vaccine designs with more predictable stability and performance.
A useful characterization focuses on the antigen, the insoluble material, and the binding environment, especially pH and ionic strength. Researchers can examine adsorption capacity under defined combinations of these variables and compare how strongly association is maintained. The resulting profile helps identify conditions suitable for consistent bacterial vaccine formulation and evaluation.
Association with an adjuvant particle can help regulate how bacterial antigen is released at the injection site. A more sustained local presence may support antigen presentation over time and contribute to stronger or more sustained immune responses. This makes release behavior an important consideration when linking formulation conditions to expected vaccine performance.
It is especially relevant when a bacterial vaccine must balance antigen association, stability, and immune performance. Adsorption studies can help evaluate whether a formulation remains consistent and whether its binding conditions support the intended behavior at the injection site. They therefore connect physicochemical characterization with biological goals such as improved presentation and sustained responses.