Igg-opsonized Rbcs
Igg-opsonized Rbcs - Related Videos
04:33
Real-Time Imaging of Macrophage Phagocytosis of IgG-Opsonized Red Blood Cells
0 Views •
2025
This video demonstrates an assay to monitor independent macrophage-mediated red blood cell (RBC) phagocytosis events. Mouse immunoglobulin G (IgG)-opsonized human RBCs are incubated with mouse macrophages and observed under a confocal microscope. The RBCs are engulfed by macrophages via a phagocytic cup formation and targeted for lysosomal degradation.
03:47
Determination of ROS Production by Neutrophils upon Interaction with Opsonized Biofilm
0 Views •
2025
In this video, we demonstrate an in vitro chemiluminescence assay to detect the generation of reactive oxygen species by neutrophils upon exposure to an opsonized bacterial biofilm.
10:38
High Yield Purification of Plasmodium falciparum Merozoites For Use in Opsonizing Antibody Assays
0 Views •
Cited by 18 •
2014
Measuring antibody function is key to understanding immunity to Plasmodium falciparum malaria. This method describes the purification of viable merozoites, and measurement of opsonization-dependent phagocytosis by flow cytometry.
03:22
Modeling Complement-Mediated Phagocytosis Using Opsonized Red Blood Cells In Vitro
0 Views •
2026
Source: Nagre, N., et al. Alveolar Macrophage Phagocytosis and Bacteria Clearance in Mice. J. Vis. Exp. (2019).This video demonstrates the assessment of complement receptor-mediated phagocytosis using sheep red blood cells opsonized with IgM and complement, followed by their uptake by mouse macrophages. The extent of phagocytosis is quantified by measuring a blue chromogenic product formed through hemoglobin-catalyzed oxidation of diaminofluorene.
06:34
An Opsono-Adherence Assay for Assessing the Opsonization of Encapsulated Bacteria by Anti-Capsule Antibodies
0 Views •
2025
This video demonstrates an opsono-adherence assay for examining the interaction between opsonized bacteria and immune cells. Fluorescently labeled bacteria, treated with test serum containing anti-capsule antibodies, are incubated with macrophages. After staining the macrophages with fluorescence, the attached bacteria on the macrophage surface are observed under a microscope for visualization.
FAQs
The outward-facing Fc regions of bound IgG provide the recognition site for Fcγ receptors on phagocytes. Receptor engagement promotes firm cellular attachment, which can progress to engulfment and downstream immune responses. This arrangement separates antibody specificity from effector-cell activity, allowing experiments to examine how receptor recognition converts antibody binding into cellular clearance.
Antibody specificity determines which red blood cells become marked for recognition, while the exposed IgG Fc region connects that recognition event to phagocyte activity. This makes the system useful for distinguishing target selection from effector function. In immune-mediated hemolysis research, that distinction helps relate antibody binding to subsequent red blood cell removal.
Recognition can produce a sequence of attachment, engulfment, and downstream immune responses. These stages provide separate points for evaluating Fc receptor activity rather than treating clearance as a single event. Studying the sequence helps clarify how phagocytes respond to antibody-marked cells and how cellular effector functions contribute to antibody-mediated elimination.
A study first establishes antibody-coated red blood cells as the defined target population, then examines their interaction with phagocytes. The key observations concern Fcγ receptor recognition, cellular attachment, engulfment, and resulting immune responses. This workflow supports controlled analysis of antibody-dependent phagocytosis without requiring the target to be a microbial cell.
The model can be used to assess Fc receptor activity, antibody-dependent phagocytosis, and mechanisms of red blood cell clearance. It also offers a defined system for examining how antibody specificity and effector-cell behavior interact. In infection research, these principles provide context for understanding antibody-directed cellular defense, even though the experimental target is a red blood cell.
Changes in recognition, attachment, engulfment, or clearance can be interpreted in relation to antibody-mediated red blood cell removal. Because the cells carry defined antibody signals, the system helps connect Fcγ receptor function with effector-cell handling of marked targets. This provides mechanistic context for investigating how immune recognition may contribute to hemolysis and related clearance processes.