Pro-apoptotic Protein Expression
Pro-apoptotic Protein Expression - Related Videos
02:43
Transfection of an Inducible Gene Expression System into Cells Expressing a Bacterial Effector Protein
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2025
Source: Berens, C. et al. Applying an Inducible Expression System to Study Interference of Bacterial Virulence Factors with Intracellular Signaling. J. Vis. Exp. (2015)This video demonstrates the use of an inducible expression system to identify where the bacterial effector protein CaeB disrupts the host apoptotic cascade. It outlines the steps for transfecting CaeB-expressing cells with a tetracycline-responsive system to induce pro-apoptotic gene expression in order to identify the point of...
08:46
Green Fluorescent Protein-based Expression Screening of Membrane Proteins in Escherichia coli
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Cited by 34 •
2015
A streamlined approach to screening for the expression of recombinant membrane proteins in Escherichia coli based on fusion to green fluorescent protein is presented.
05:36
Analysis of Efferocytosis of Apoptotic Thymocytes by Peritoneal Macrophages
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2025
This video demonstrates a procedure for analyzing peritoneal macrophage-mediated efferocytosis of apoptotic mouse thymocytes by fluorescence microscopy.
02:58
Immunoblot Analysis of Apoptosis Inhibition in Host Cells Expressing an Antiapoptotic Bacterial Protein
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2026
Source: Berens, C. et al. Applying an Inducible Expression System to Study Interference of Bacterial Virulence Factors with Intracellular Signaling. J. Vis. Exp. (2015)This video demonstrates the use of immunoblotting to assess apoptosis inhibition by the bacterial effector protein CaeB in human cells. It outlines the steps for detecting apoptotic markers following doxycycline-induced expression of pro-apoptotic proteins in host cells expressing the effector.
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.
FAQs
Changes in pro-apoptotic protein expression can promote mitochondrial outer-membrane permeabilization, an event that allows cytochrome c to leave the mitochondria. Cytochrome c then contributes to caspase activation, establishing a downstream cascade that commits the cell to apoptosis. This connection helps researchers relate protein-level changes to the progression of programmed cell death.
The mitochondrial pathway links pro-apoptotic proteins to mitochondrial outer-membrane permeabilization and cytochrome c release. Death-receptor signaling instead begins with signals transmitted through cell-surface death receptors and proceeds through apoptotic cascades. Comparing these routes helps determine whether a cellular response is associated primarily with internal stress-related signaling or externally initiated death signals.
Protein levels must be considered in relation to the cellular condition that produced them. Stress, developmental cues, infection, and anticancer treatments can each influence apoptotic responses, so increased expression may indicate different biological circumstances. Studying regulation alongside the relevant stimulus helps researchers connect observed protein changes with tissue homeostasis, damage removal, or treatment response.
Changes in pro-apoptotic protein expression can help explain whether cells are responding to damage, developmental instructions, infection, or therapeutic treatment. Through pathways that lead toward caspase activation, these changes may influence the removal of cells that are no longer appropriate or healthy. The resulting information supports interpretation of cell survival and death within biological systems.
Researchers measure pro-apoptotic protein levels under defined biological conditions and compare the results with the question being studied. Conditions may include cellular stress, developmental cues, infection, or exposure to an anticancer treatment. These measurements provide evidence about how cells regulate apoptosis and help connect experimental conditions with changes in death-related signaling.
In cancer research, measuring pro-apoptotic protein expression can reveal whether cells respond to treatments by engaging pathways that promote apoptosis. This is relevant to strategies designed to restore appropriate cell death, particularly when abnormal survival contributes to disease. The measurements can therefore help evaluate how anticancer interventions affect apoptotic signaling in biological models.
Pro-apoptotic protein expression provides a way to study controlled cell removal across several biological contexts. During development and tissue maintenance, it can help clarify how homeostasis is preserved; in immune research, it can illuminate regulated cell elimination; and in neurodegeneration studies, it can help examine stress-associated death pathways. These applications extend beyond cancer-focused investigations.