Intracellular Labeling
Intracellular Labeling - Related Videos
08:14
Detection of Intracellular Gene Expression in Live Cells of Murine, Human and Porcine Origin Using Fluorescence-labeled Nanoparticles
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Cited by 1 •
2015
This manuscript describes a novel technique which allows the detection of intracellular gene expression after endocytosis of fluorescence-labeled nanoparticles directly in live cells. The method does not require manipulation of the cells and is not restricted with respect to the target gene or species.
07:18
Intracellular Refolding Assay
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Cited by 9 •
2012
In this protocol a method to measure intracellular protein refolding after heat shock is described. This method can be used to study foldases like molecular chaperones and their co-factors or compounds able to influence their activity. Firefly luciferase activity is used as reporter to measure chaperone refolding activity.
10:30
The C. elegans Excretory Canal as a Model for Intracellular Lumen Morphogenesis and In Vivo Polarized Membrane Biogenesis in a Single Cell: labeling by GFP-fusions, RNAi Interaction Screen and Imaging
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Cited by 6 •
2017
The C. elegans excretory canal is a unique single-cell model for the visual in vivo analysis of de novo polarized membrane biogenesis. This protocol describes a combination of standard genetic/RNAi and imaging approaches, adaptable for the identification and characterization of molecules directing unicellular tubulogenesis, and apical membrane and lumen biogenesis.
02:35
Visualizing Intracellular Transport of Cargo in Cultured Astrocytes
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2025
Source: Creighton, B. A., et al. Visualizing and Analyzing Intracellular Transport of Organelles and Other Cargos in Astrocytes. J. Vis. Exp. (2019)This video demonstrates the visualization of intracellular cargo transport in cultured astrocytes using a fluorescent acidotropic probe that selectively labels acidic endolysosomal vesicles. Time-lapse imaging and Z-stack acquisition with a confocal microscope allow tracking of fluorescently labeled cargo throughout the three-dimensional cell volume.
09:19
Simultaneous Label-Free Autofluorescence Multi-Harmonic Microscopy
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Cited by 3 •
2025
This protocol presents a step-by-step guide for the Simultaneous Label-free Autofluorescence Multi-harmonic (SLAM) microscopic technique, including details on how to generate the laser light source, prepare a tissue sample, conduct imaging, and analyze the data. SLAM advances nonlinear microscopy by measuring four complementary label-free contrasts to investigate the tissue microenvironment.
FAQs
Different label types generate signals through distinct target-binding or tagging mechanisms. Fluorescent reporter proteins provide a fluorescent readout, whereas antibody binding or nucleic acid probes associate the detectable signal with selected cellular targets. Chemical reactions can attach tags directly to specific targets. Choosing among these mechanisms determines how molecular location, abundance, or behavior can be examined.
Accuracy depends on two linked conditions: the label must enter or be introduced into the cell, and its signal must remain associated with the intended target. When those conditions are met, measurements can be interpreted in terms of location, abundance, and behavior. If labeling is not target-specific, the observed signal may not clearly represent the structure or molecule of interest.
Fluorescence microscopy, flow cytometry, and related imaging methods can all be used to examine signals produced by intracellular labels. In this context, these readouts support tracking protein expression and analyzing cellular organization. Their use connects detectable molecular signals with cellular patterns, allowing measurements to be interpreted for location, abundance, or behavior rather than as an isolated signal.
A typical workflow identifies the molecule, organelle, or structure of interest, introduces or delivers an appropriate label, and then detects the resulting signal with fluorescence microscopy, flow cytometry, or a related imaging method. Researchers can then assess the label’s location, abundance, or behavior. This sequence links the labeling step to a measurable cellular outcome.
It is useful for tracking protein expression, studying cellular organization, and monitoring processes that occur within cells, including transport, signaling, and cell division. The approach also supports research on development, disease biology, and drug evaluation. These applications make it possible to examine how labeled molecular activity relates to changes or patterns in cellular function.
By showing where a labeled target is located, how abundant it is, or how it behaves, the resulting measurements provide a link between molecular activity and cellular function. In biology, that connection helps researchers interpret organization and dynamic processes such as transport, signaling, and division. It also supports investigations related to development, disease biology, and drug evaluation.