Immune Complex Activation
Immune Complex Activation - Related Videos
03:35
Flow Cytometry-Based Analysis of Dendritic Cell Activation Using Immune Complexes
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2025
This video demonstrates a protocol for assessing the activation of dendritic cells using immunoglobulin G (IgG)-coated tumor cells. Dendritic cells internalize the IgG-coated tumor cells, process the tumor antigens, and present them on the surface through MHC-II molecules, along with the co-expression of the costimulatory molecule CD86. These dendritic cells then undergo MHC-II and CD86-targeted immunostaining and flow cytometry analysis to identify their activation state.
01:31
Active versus Passive Immunity
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2024
Immunity, along with the ability to limit pathogen growth to prevent significant body tissue damage, can be gained either by (1) actively developing an immune response within the individual after exposure to a pathogen or after getting vaccinated or (2) passively transferring immune components from an immune individual to one who is nonimmune. Both these forms of immunity can be found naturally and in medical practices. Active Immunity Active immunity refers to the resistance one develops...
01:19
Hypersensitivity Reactions: Immune-Complex Reactions
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2026
Type III hypersensitivity reactions occur when antigen–antibody complexes form and activate the complement system. Normally, these complexes help the clearance of antigens by phagocytes and red blood cells. However, when large numbers of immune complexes are present, they can deposit in tissues—particularly in the walls of blood vessels—leading to inflammation and tissue injury. These deposits trigger complement activation and neutrophil recruitment, resulting in serum sickness, a systemic...
12:42
Probing for Mitochondrial Complex Activity in Human Embryonic Stem Cells
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Cited by 8 •
2008
In this video, we will show you how the mitochondrial respiratory chain complexes of human embryonic stem cells can be analyzed using in gel activity assays.
11:48
Isolation Protocol of Mouse Monocyte-derived Dendritic Cells and Their Subsequent In Vitro Activation with Tumor Immune Complexes
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Cited by 3 •
2018
Monocyte-derived DC (MoDC) can sense minor amounts of danger-associated molecules and are therefore easily primed. We provide a detailed protocol for the isolation of MoDC from blood and tumors and their activation with immune complexes while highlighting key precautions that should be considered in order to avoid their premature activation.
FAQs
Fc regions provide an antibody-dependent route for immune complexes to communicate with immune cells. When these regions engage Fc receptors, the interaction can stimulate cellular signaling that changes inflammatory activity and leukocyte behavior. In cancer research, analyzing this route helps separate effects caused by antibody-bearing complexes from those produced through complement activation within the tumor microenvironment.
Regions exposed on immune complexes may activate the complement cascade, generating mediators that recruit and stimulate leukocytes. This pathway can therefore reinforce or broaden the cellular effects initiated through Fc receptors. Evaluating both mechanisms is important because complement-derived signals may help explain the intensity of inflammation and the resulting tissue response associated with tumor-associated immune complexes.
The same signaling network can produce inflammatory effects that have different consequences for a tumor. Immune complex activation influences leukocyte recruitment and stimulation, while the surrounding tumor microenvironment shapes how those responses affect immunity. Consequently, tumor-associated antigens and antibodies may contribute to immune activity that supports antitumor responses or to inflammation that does not produce the same benefit.
Cancer studies can examine how tumor-associated antigens and antibodies engage Fc receptor and complement pathways, then relate those signals to inflammatory activity, leukocyte recruitment, and local tissue responses. This approach connects molecular interactions with changes in the tumor microenvironment. It also helps researchers determine whether observed immune effects are more consistent with supportive or hindering antitumor activity.
Studying these pathways can identify relationships between tumor-associated antigens, antibodies, inflammatory signaling, and immune-cell recruitment. Those relationships may help define biomarkers that reflect immune activity or treatment-related immune effects in cancer. The value comes from linking a measurable antigen or antibody response with changes in the tumor microenvironment rather than interpreting the marker in isolation.
The pathway provides a framework for examining how antibodies and tumor-associated antigens influence immune signaling during cancer treatment. Fc receptor engagement and complement activation can be evaluated as contributors to inflammatory responses and leukocyte behavior. This context supports investigation of immunotherapy mechanisms, helps interpret treatment-related immune effects, and may reveal pathways that either assist or limit antitumor immunity.