Neutrophil Integrin Binding
Neutrophil Integrin Binding - Related Videos
01:10
Integrins
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2023
Animal and protozoan cells do not have cell walls to help maintain shape and provide structural stability. Instead, these eukaryotic cells secrete a sticky mass of carbohydrates and proteins into the spaces between adjacent cells. This network of proteins and molecules is called an extracellular matrix or ECM. Some ECM proteins assemble into a basement membrane to which the remaining components adhere. Proteoglycans typically form the bulk of the ECM while fibrous proteins, like collagen,...
12:42
Human Neutrophil Flow Chamber Adhesion Assay
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Cited by 12 •
2014
A method of quantitating neutrophil adhesion is reported. This method creates a dynamic flow environment similar to that encountered in a blood vessel. It allows the investigation of neutrophil adhesion to either purified adhesion molecules (ligand) or endothelial cell substrate (HUVEC) in a context similar to the in vivo environment with sheer stress.
01:15
Activation of Integrins
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2023
Integrins bind ligands and transmit information from outside the cell to inside or vice-versa through an "outside-in signaling" or "inside-out signaling." In "outside-in signaling," external factors in the extracellular space bind to exposed ligand binding sites on integrins. This causes the inactive protein to undergo a conformational change to become active. Integrins are often clustered on the cell membrane. Repetitive and regularly spaced ligand binding events provide an effective stimulus.
08:26
A Simple and Efficient Method to Detect Nuclear Factor Activation in Human Neutrophils by Flow Cytometry
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Cited by 23 •
2013
Neutrophils are the most abundant leukocytes in blood. Neutrophils possess transcriptionally regulated functions such as production of proinflammatory cytokines and inhibition of apoptosis. These functions can be studied with the method presented here, which allows detection and quantification of nuclear factors by flow cytometry in isolated...
04:32
Induction and Visualization of Neutrophil Extracellular Traps in Pre-Labeled Neutrophils
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2025
This video demonstrates the induction and visualization of neutrophil extracellular traps or NETs in pre-labeled neutrophils using patient serum containing anti-neutrophil cytoplasmic antibodies. Furthermore, using an impermeable DNA dye and fluorescence microscopy enables the visualization of NETs.
FAQs
Chemokines initiate inside-out signaling, an intracellular pathway that changes integrin behavior from a less adhesive state to one with greater affinity for binding partners. This activation also promotes receptor clustering on the neutrophil surface, increasing the opportunity for LFA-1 and Mac-1 to engage counter-receptors such as ICAM-1. The result is stronger adhesion under relevant flow conditions.
Fluid shear provides a mechanically relevant condition for testing whether activated integrins can maintain receptor-counter-receptor interactions. Under these conditions, increased affinity and receptor clustering become especially important because LFA-1 and Mac-1 must engage ICAM-1 or matrix proteins while fluid is moving. Assays that include shear can therefore reveal adhesion behavior not captured by static measurements.
Binding is not only an attachment event; it is part of a sequence connecting chemokine-driven activation with immune-cell trafficking and inflammation. When engineered systems quantify adhesion alongside migration and activation, they can examine how changes in receptor engagement influence neutrophil behavior. This integrated view is useful for studying leukocyte mechanobiology rather than adhesion as an isolated endpoint.
Microfluidic assays create engineered platforms in which neutrophil adhesion, migration, and activation can be measured in relation to integrin engagement. By incorporating relevant binding partners and fluid shear, these systems allow researchers to examine receptor-mediated interactions under defined experimental conditions. Their value lies in connecting observable cell behavior with the physical and biochemical features of the test environment.
Relevant test interfaces include endothelial cells, extracellular matrix, and engineered surfaces. These settings let investigators examine how neutrophil integrins engage cellular counter-receptors, such as ICAM-1, or matrix proteins. Comparing these interfaces supports bioengineering studies of vascular interactions, biomaterial responses, and surface designs intended to influence immune-cell adhesion.
Results from these studies can show how a material or vascular model affects neutrophil adhesion, migration, and activation. That information helps researchers evaluate inflammatory responses and immune compatibility, supporting the development of materials with improved interactions with immune cells. The same experimental approach can also contribute to therapy development by clarifying how engineered environments influence neutrophil behavior.