Vital Dye Labeling
Vital Dye Labeling - Related Videos
08:22
Visualization of Caenorhabditis elegans Cuticular Structures Using the Lipophilic Vital Dye DiI
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Cited by 30 •
2012
We present a method to visualize cuticle in live C. elegans using the red fluorescent lipophilic dye DiI (1,1'-dioctadecyl-3,3,3',3'-tetramethylindocarbocyanine perchlorate), which is commonly used in C. elegans to visualize environmentally exposed neurons. With this optimized protocol, alae and annular cuticular structures are stained by DiI and observed using compound microscopy.
06:55
Diagnosis of Neoplasia in Barrett’s Esophagus using Vital-dye Enhanced Fluorescence Imaging
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Cited by 1 •
2014
Vital-dye enhanced fluorescence imaging (VFI) is a novel in vivo technique that combines high-resolution epithelial imaging with exogenous topical fluorescent contrast to highlight glandular morphology and delineate neoplasia (high grade dysplasia and cancer) in the distal esophagus.
06:48
Antibody Labeling with Fluorescent Dyes Using Magnetic Protein A and Protein G Beads
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Cited by 3 •
2016
The on-bead method for labeling antibodies with small molecules enables labeling of a small amount of antibodies directly from cell media. This method is compatible with amine and thiol chemistry, and can handle multiple samples in parallel, manually or using automated platforms.
04:47
Retrograde Labeling of Drosophila Motor Neurons Using Fluorescent Lipophilic Dyes
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2025
Source: Inal, M. A. et. al., Retrograde Tracing of Drosophila Embryonic Motor Neurons Using Lipophilic Fluorescent Dyes. J. Vis. Exp. (2020)This video demonstrates the method of retrograde labeling of Drosophila motor neurons using lipophilic dyes. The dye enters the axon, travels retrogradely, and labels the neurons green, allowing detailed visualization of their morphology and projections under a confocal microscope.
07:42
Labeling Stem Cells with Fluorescent Dyes for non-invasive Detection with Optical Imaging
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Cited by 33 •
2008
This video shows techniques for labeling of human embryonic stem cells and mesenchymal stem cells with fluorescent dyes. This technique can be used for an in vivo tracking of transplanted stem cells with optical imaging and for histopathological correlations with fluorescence microscopy.
FAQs
The labeling outcome depends on how a dye interacts with a living cell. A membrane-permeable molecule may enter and remain detectable after enzymatic conversion, binding to intracellular components, or sequestration in an organelle. These mechanisms preserve a cellular signal that can be related to structure, location, or behavior while the labeled cell remains functionally intact.
Cell damage can alter membrane permeability, intracellular processing, or retention of the dye. As a result, damaged cells may exclude the molecule or lose a signal that viable cells maintain. Comparing these contrasting outcomes allows investigators to assess cell viability and interpret changes associated with infection, immune-cell activity, cytotoxicity, or treatment.
The dye must match the feature being investigated. Some labeling approaches emphasize whether cells remain viable, whereas others reveal structure, behavior, lineage, or the presence of material within cellular compartments. In immunology, this distinction determines whether the experiment follows cell survival, identifies a cell population, or examines how cells interact with pathogens.
Researchers first identify the cellular event they need to measure, such as viability, migration, proliferation, phagocytosis, or a host-pathogen interaction. They then select a dye whose entry, conversion, binding, or organelle sequestration produces a suitable signal for that event. This alignment helps preserve cellular function while generating an interpretable readout.
In immunology and infection research, labeled leukocytes can be followed as they migrate, divide, or survive. The method can also reveal phagocytosis, in which immune cells take up material, and help monitor interactions between host cells and pathogens. These applications connect cell-level behavior with broader immune responses and infection dynamics.
The resulting cell-labeling patterns can help investigators evaluate immune responses, infection progression, cytotoxicity, and therapeutic effects. For example, changes in viability, movement, proliferation, or phagocytic activity may indicate how host cells respond to a pathogen or treatment. The approach therefore links observable cellular behavior with changes in the experimental condition.