Apoptotic Cell Removal
Apoptotic Cell Removal - Related Videos
08:59
Live Imaging of Apoptotic Cell Clearance during Drosophila Embryogenesis
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Cited by 10 •
2013
Here we describe an effective method for studying dynamics of apoptotic cell clearance in vivo. This method employs live Drosophila embryos as a powerful model for monitoring phagocytosis of apoptotic cells using specific labeling of apoptotic cells and phagocytes.
03:54
An In Vitro Technique for UV Irradiation-Mediated Generation of Apoptotic T Cells
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2025
This video demonstrates a method to induce apoptosis in the Jurkat cells — a human T lymphocyte leukemia cell line. The cells are exposed to ultraviolet C (UVC) radiation, which causes extensive DNA damage and leads to apoptotic cell death.
01:30
TUNEL Assay for Detecting Apoptotic Cell Death in a Brain Slice
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2025
To detect apoptotic cell death using the TUNEL assay, treat the brain slice with the enzyme proteinase-K.
01:17
Phagocytosis of Apoptotic Cells
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2023
Cells undergoing apoptosis form apoptotic bodies that must be removed immediately to prevent inflammation, autoimmune diseases, and necrosis. Phagocytosis is carried out by professional phagocytes such as macrophages or immature dendritic cells. Non-professional phagocytes such as epithelial cells and fibroblasts also take part in this process; however, they are not as effective as professional phagocytes. Normal cells contain receptors that prevent them from being recognized by phagocytes.
04:57
Fixed Cell Efferocytosis Assay: A Method to Study Efferocytic Uptake of Apoptotic Cells by Macrophages Using Fluorescence Microscopy
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2025
In this video, we demonstrate the efferocytosis assay to study the clearance of apoptotic cells using confocal microscopy. Efferocytosis is a multi-step process where apoptotic cells are engulfed by phagocytes and degraded within vesicles called efferosomes. This protocol provides a method to visualize internalized and non-internalized portions of individual apoptotic cells and quantify efferocytosis.
FAQs
A dying cell can display phosphatidylserine on its surface, creating a recognition signal for phagocytes. This surface change allows the phagocyte to distinguish the apoptotic cell from surrounding healthy tissue and initiate uptake. Because recognition occurs before intracellular contents escape, phosphatidylserine exposure helps connect cellular death with orderly clearance and supports tissue stability.
Efferocytosis proceeds through recognition, engulfment, and digestion. After identifying the apoptotic cell, the phagocyte encloses it and internalizes its cellular material for breakdown. This sequence removes the dying cell while limiting inflammatory signaling, allowing clearance to occur without creating the type of tissue disturbance associated with accumulated cellular debris.
Prompt clearance prevents dying cells from accumulating and releasing harmful intracellular contents. By removing cellular debris before it disrupts surrounding tissue, the process helps preserve local homeostasis and restrain unnecessary inflammation. This timing is especially relevant in tissues that continually undergo cell turnover, where inefficient disposal could progressively impair normal tissue function.
When clearance is inefficient, apoptotic cells and their debris may persist in tissues. The resulting disturbance can promote chronic inflammation, contribute to autoimmunity, or impair tissue function. These consequences make the pathway relevant to biology research on inflammatory disease and help explain why failures in disposal are considered more than a simple waste-management problem.
A conceptual analysis follows the dying cell from surface recognition through phagocyte uptake and intracellular digestion. Researchers can then consider whether clearance limits inflammatory signaling and prevents debris accumulation. Examining these stages separately helps identify whether a defect affects recognition, engulfment, processing, or the tissue-level outcome of the removal response.
Effective clearance supports normal development, immune regulation, and tissue repair. During development, removing cells that are no longer needed helps shape tissues; in immune biology, restrained disposal helps regulate inflammatory responses; during repair, clearing debris supports restoration of tissue function. These connections make the process relevant across several areas of biology rather than to cell death alone.
The pathway links cellular turnover with immune and tissue behavior, so changes in clearance can have broad biological consequences. Studies in cancer, infection, and inflammatory disease can examine how removal affects debris accumulation, inflammatory signaling, immune regulation, or tissue function. Comparing these contexts helps reveal when clearance is protective and when its failure contributes to pathology.