Cytosolic Hyper-replication
Cytosolic Hyper-replication - Related Videos
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Detection of Toxin Translocation into the Host Cytosol by Surface Plasmon Resonance
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In this report, we describe how surface plasmon resonance is used to detect toxin entry into the host cytosol. This highly sensitive method can provide quantitative data on the amount of cytosolic toxin, and it can be applied to a range of toxins.
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Quantification of Cytosolic vs. Vacuolar Salmonella in Primary Macrophages by Differential Permeabilization
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We describe the quantification of cytosolic and vacuolar Salmonella typhimurium in bone-marrow derived macrophages using differential digitonin permeabilization.
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Measurement of Cytosolic Ca2+ in Isolated Contractile Lymphatics
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We introduce an approach to evaluate the cytosolic Ca2+ concentration in isolated lymphatics to study Ca2+-dependent and Ca2+-sensitizing mechanisms of lymphatic smooth muscle contraction.
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Measurement of Vacuolar and Cytosolic pH In Vivo in Yeast Cell Suspensions
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Vacuolar and cytosolic pH can be measured in live yeast (S. cerevisiae) cells using ratiometric fluorescent dyes localized to specific cellular compartments. We describe procedures for measuring vacuolar pH with BCECF-AM, which localizes to the vacuole in yeast, and cytosolic pH with a cytosolic ratiometric pH-sensitive GFP (yeast pHluorin).
02:31
Chromosome Replication
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2020
Before a cell can divide, it must accurately replicate all of its chromosomes, including the DNA and its associated histone and non-histone proteins. This process begins at numerous origins of replication during the S phase of the cell cycle in each of a cell’s chromosomes simultaneously. Certain nucleotides can act as origins of replication, but these sequences are not well defined - especially in complex, multi-cellular, eukaryotic species. The length of DNA that spans an origin of...
FAQs
Escape from a membrane-bound vacuole changes the pathogen’s immediate environment by placing it in the host-cell cytosol. That access can support faster multiplication than the pathogen’s earlier intracellular state, increasing microbial abundance within the infected cell. The resulting rise in cytosolic burden helps explain why vacuole escape is a pivotal transition in infection biology.
Rapid cytosolic growth can amplify the amount of microbial material available for recognition by innate immune pathways. This connects pathogen replication with immune activation: a cell containing a larger cytosolic burden may generate a stronger signal than one with less microbial material. Studying this relationship helps separate replication-associated effects from broader differences among infected cells.
Membrane damage provides a mechanistic bridge between intracellular pathogen growth and disease-associated host responses. In infections featuring cytosolic hyper-replication, increased microbial burden can be examined alongside pathogen-driven membrane damage, inflammatory cytokine production, and cell death. Considering these outcomes together links microbial behavior to both cellular injury and immune consequences rather than treating replication as an isolated measurement.
Not all infected cells necessarily show the same biological outcome, so comparing cells with different cytosolic bacterial burdens can reveal how microbial load relates to severity and immune activation. Such comparisons may identify whether greater burden accompanies more membrane damage, stronger inflammatory cytokine production, or increased cell death. This cell-level view is central to interpreting heterogeneous infection phenotypes.
An investigation can pair a measurement of cytosolic bacterial burden with measurements of host responses in the same experimental framework. The key comparison is whether changes in microbial load track with inflammatory cytokine production, membrane damage, or cell death. This paired design does not merely count bacteria; it connects burden to consequences relevant to immunology and infection.
Researchers can use cytosolic hyper-replication as a lens for studying pathogen virulence, because unusually high intracellular growth may help explain infection severity and host-cell injury. The resulting burden-response relationships can also inform evaluation of antimicrobial or host-directed strategies. These approaches address different sides of the problem: reducing the pathogen or modifying the host response associated with infection.