Neutrophil Apoptosis
Neutrophil Apoptosis - Related Videos
01:30
Apoptosis
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2023
Apoptosis is a combination of two Greek words, 'apo' and 'ptosis,' meaning separation and falling off, respectively. Hippocrates used this word to describe gangrene, which was caused due to bandaging of fractured bones. Apoptosis was distinguished from necrosis in 1970 when John Kerr reported observations of morphological changes occurring during apoptosis. During one experiment, he observed that the disruption of blood supply to the liver tissue resulted in a size reduction of the tissue.
07:12
Neutrophil Isolation Protocol
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Cited by 173 •
2008
Neutrophils are among the first cells to arrive on the site of inflammatory immune response, and their functions and mechanisms have been studied extensively in vitro. We demonstrate a standard density gradient separation method to isolate human neutrophils from whole blood using commercially available separation media.
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.
07:42
Activation of Apoptosis by Cytoplasmic Microinjection of Cytochrome c
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Cited by 15 •
2011
In this protocol, we describe the direct cytoplasmic microinjection of cytochrome c protein into fibroblasts and primary sympathetic neurons. This technique allows for the introduction of cytochrome c protein into the cytoplasm of cells and mimics the release of cytochrome c from mitochondria, which occurs during apoptosis.
04:23
Determining the Role of Neutrophil-Like Cells in Lymphoma Cell Sensitivity to a Test Drug
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2025
This video demonstrates an assay investigating the role of neutrophil-like cells in safeguarding lymphoma cells against the cytotoxicity of chemotherapeutic agents. A 3D co-culture, consisting of lymphoma and neutrophil-like cells, is established and exposed to vincristine—a chemotherapy drug. Direct contact with the neutrophil-like cells induces an upregulation of anti-apoptotic proteins in the lymphoma cells, thereby promoting their survival in the presence of vincristine.
FAQs
The central intracellular transition is activation of death-signaling pathways that turn on caspases, enzymes that execute regulated cellular dismantling. Their activity produces chromatin condensation, cellular shrinkage, and apoptotic-body formation. Because these changes occur while the plasma membrane remains largely intact, the dying neutrophil can be identified and cleared without immediately releasing its inflammatory contents into surrounding tissue.
Maintaining a largely intact plasma membrane separates controlled cell removal from uncontrolled release of intracellular material. This condition allows phagocytes to recognize and engulf the dying neutrophil through efferocytosis before inflammatory contents escape. The result is a mechanism that limits additional tissue stimulation while still removing aged or activated immune cells from the local environment.
The timing of neutrophil apoptosis helps determine how long an innate immune response persists. Removing aged or activated neutrophils contributes to termination of their activity, whereas altered survival can change the duration of inflammation. For this reason, studying the process helps explain how tissues move from an active response toward restored homeostasis after infection or injury.
Efferocytosis is the phagocytic recognition and engulfment of apoptotic cells. After neutrophil apoptosis, this clearance step removes cellular remnants and helps prevent inflammatory contents from accumulating in tissue. It therefore connects intracellular cell-death events with tissue-level resolution, making phagocyte handling of apoptotic neutrophils an important part of maintaining local balance.
A study can follow several linked outcomes: intracellular death signals, caspase activation, chromatin condensation, cellular shrinkage, apoptotic-body formation, and preservation of the plasma membrane. Researchers can also examine whether phagocytes recognize and engulf the affected cells. Considering these features together helps distinguish regulated neutrophil removal from incomplete clearance or continued cellular persistence.
These studies connect neutrophil fate with the transition from inflammation to tissue homeostasis. Researchers can ask whether activated or aged neutrophils undergo the expected cellular changes and whether phagocytes subsequently clear them. The combined outcome indicates how effectively an inflammatory cell population is removed, providing biological context for recovery after infection or injury.
Neutrophil apoptosis is relevant because the process controls removal of cells that participate in innate immune responses. If neutrophil survival or clearance is altered, the response may not resolve appropriately, making this pathway informative in studies of chronic inflammation and autoimmune disease. It also provides a framework for investigating treatments intended to adjust neutrophil survival.
Treatment research can use neutrophil apoptosis as a point of intervention by examining how changes in cell survival affect inflammatory duration and clearance. The key context is not apoptosis alone, but its relationship to caspase activity, membrane integrity, and phagocyte engulfment. These linked outcomes help evaluate whether adjusting neutrophil persistence could influence resolution and tissue homeostasis.