Subcellular Signaling Events
Subcellular Signaling Events - Related Videos
09:40
Imaging G-protein Coupled Receptor (GPCR)-mediated Signaling Events that Control Chemotaxis of Dictyostelium Discoideum
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Cited by 2 •
2011
Here, we describe detailed live cell imaging methods for investigating chemotaxis. We present fluorescence microscopic methods to monitor spatiotemporal dynamics of signaling events in migrating cells. Measurement of signaling events permits us to further understand how a GPCR-signaling network achieves gradient sensing of chemoattractants and controls directional migration of eukaryotic cells.
08:24
Imaging G Protein-coupled Receptor-mediated Chemotaxis and its Signaling Events in Neutrophil-like HL60 Cells
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Cited by 7 •
2016
Visual chemotaxis assays are essential for a better understanding of how eukaryotic cells control chemoattractant-mediated directional cell migration. Here, we describe detailed methods for: 1) real-time, high-resolution monitoring of multiple chemotaxis assays, and 2) simultaneously visualizing the chemoattractant gradient and the spatiotemporal dynamics of signaling events in neutrophil-like HL60 cells.
09:00
Live Cell Imaging of Early Autophagy Events: Omegasomes and Beyond
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Cited by 13 •
2013
Time-lapse microscopy of fluorescently labeled autophagy markers allows monitoring of the dynamic autophagy response with high temporal resolution. Using specific autophagy and organelle markers in a combination of 3 different colors, we can follow the contribution of a protein to autophagosome formation in a robust spatial and temporal context.
10:34
FRET Microscopy for Real-time Monitoring of Signaling Events in Live Cells Using Unimolecular Biosensors
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Cited by 29 •
2012
Förster resonance energy transfer (FRET) microscopy is a powerful technique for real-time monitoring of signaling events in live cells using various biosensors as reporters. Here we describe how to build a customized epifluorescence FRET imaging system from commercially available components and how to use it for FRET experiments.
11:19
Imaging Subcellular Structures in the Living Zebrafish Embryo
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Cited by 8 •
2016
Imaging the dynamic behavior of organelles and other subcellular structures in vivo can shed light on their function in physiological and disease conditions. Here, we present methods for genetically tagging two organelles, centrosomes and mitochondria, and imaging their dynamics in living zebrafish embryos using wide-field and confocal microscopy.
FAQs
Spatial localization confines signaling molecules and reactions to particular cellular compartments. This arrangement helps a cell produce a response where and when it is needed, rather than activating the same process throughout the cell. As a result, signals can regulate metabolism, gene expression, movement, or survival with greater precision and fewer unintended effects in other regions.
Calcium ions and cyclic AMP act as second messengers, meaning they carry information from an activated receptor or intracellular sensor to downstream molecular targets. Their involvement links the initial signal to later changes in protein activity and cellular behavior. Studying these messengers helps clarify how an external or internal cue becomes a coordinated intracellular response.
Protein phosphorylation changes the activity of signaling proteins and can propagate information through a pathway. The movement or assembly of signaling proteins adds another layer of control by bringing specific molecular components together in a defined cellular location. Together, these processes help determine which response occurs, how quickly it develops, and where its effects remain concentrated.
Subcellular signaling events preserve spatial differences within the cell, whereas a uniform response would affect cellular regions more broadly. Compartmentalized signaling can therefore separate simultaneous activities and restrict a pathway's effects to an appropriate location. This distinction is important when one signal must regulate a specific function without disrupting unrelated processes elsewhere in the cell.
Researchers should consider the initiating receptor or intracellular sensor, the second messengers produced, changes in protein phosphorylation, and the movement or assembly of signaling proteins. They should also relate these molecular changes to the cellular compartment in which they occur and to the resulting function. This organization connects molecular events with outcomes such as altered metabolism or gene expression.
These studies can clarify how cells regulate metabolism, gene expression, movement, and survival. Examining the molecular sequence and its cellular location helps connect a signal with the particular function that changes. The same framework also supports investigation of normal cell activity and of how disrupted signaling contributes to disease mechanisms.
Mapping localized signaling changes can reveal mechanisms of cellular dysfunction and identify molecular steps that may serve as drug targets. The resulting knowledge also supports research on cell-based therapies and biomarkers, which are measurable indicators of cellular dysfunction. These applications make subcellular signaling events relevant both to understanding disease and to developing ways to monitor or influence affected cells.