Neuron Labeling
Neuron Labeling - Related Videos
09:21
DiOLISTIC Labeling of Neurons from Rodent and Non-human Primate Brain Slices
0 Views •
Cited by 60 •
2010
We demonstrate the use of the gene gun to introduce fluorescent dyes, such as DiI, into neurons in brain slices from rodents and non-human primates of different ages. In this particular case, we use adult mice (3-6 months old) and adult cynomologus monkeys (9-15 years old). This technique, originally described by the laboratory of Dr. Lichtman (Gan et al., 2000), is well suited for the study of dendritic branching and dendritic spine morphology and can be combined with traditional...
06:56
Measuring Exocytosis in Neurons Using FM Labeling
0 Views •
Cited by 7 •
2006
The ability to measure the kinetics of vesicle release can help provide insight into some of the basics of neurotransmission. Here we used real-time imaging of vesicles labeled with the red fluorescent dye FM 4-64 to measure the rate of presynaptic vesicle release in hippocampal neuronal cultures.
04:35
Isolating Fluorescently Labeled Neurons from a Murine Brain
0 Views •
2025
This video demonstrates a method to isolate fluorescently labeled neurons from a mouse brain.
04:47
Retrograde Labeling of Drosophila Motor Neurons Using Fluorescent Lipophilic Dyes
0 Views •
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.
09:14
Labeling F-actin Barbed Ends with Rhodamine-actin in Permeabilized Neuronal Growth Cones
0 Views •
Cited by 9 •
2011
A method to visualize and quantify F-actin barbed ends in neuronal growth cones is described. After culturing neurons on glass coverslips, cells are permeabilized with a saponin-containing solution. Then, a short incubation with the saponin buffer containing rhodamine-actin incorporates fluorescent actin onto free actin barbed ends.
FAQs
The labeling strategy determines which neuronal feature becomes measurable. Fluorescent dyes can make cellular structures visible, whereas antibody-based staining can reveal cells containing particular neuronal markers. Genetic reporters and viral vectors can introduce detectable signals into selected cells, supporting analysis of identity, morphology, activity, or connectivity. This choice should match the biological question and the signal required for imaging.
Structural labels primarily reveal anatomical features such as cell bodies, axons, dendrites, synapses, or projections. Activity-dependent reporters instead alter their signal in response to neural signaling, intracellular calcium, or changes in gene expression. Consequently, they can connect neuronal labeling with functional state, allowing investigators to examine how neural networks respond during experimental manipulation rather than only where their components are located.
Specificity determines whether a signal can be associated with a defined neuronal identity or population. Antibody-based approaches may bind neuronal markers, while genetic reporters or viral vectors can place detectable molecules in selected cells or groups of cells. Interpreting the resulting image therefore requires distinguishing the labeled population from the broader tissue and relating the signal to the marker or targeting strategy used.
Fluorescence microscopy converts the label into spatial information that can be analyzed across neuronal structures. Images may show the arrangement of cell bodies, the paths of axons, the branching of dendrites, synaptic locations, or projections between regions. When the label is activity dependent, the same imaging framework can also relate fluorescence changes to signaling, calcium, or gene-expression responses.
A typical workflow begins by selecting a label that matches the intended measurement, such as morphology, identity, activity, or connections. The detectable molecule is then introduced into neurons or made available to neuronal markers through the chosen labeling approach. Researchers next use fluorescence microscopy or a related imaging method to visualize the signal and analyze the resulting cellular or circuit patterns.
Neuron labeling is useful when a study must connect cellular structure with organization across a neural system. In circuit-tracing work, visible axons, dendrites, synapses, or projections can help examine how neuronal elements are connected. During developmental studies, labeling supports observation of neuronal morphology and changing organization, providing a way to analyze how neural structures emerge or differ across conditions.
Disease studies can use labeled neurons to examine alterations in morphology, identity, connectivity, or activity. Imaging may reveal changes in cell bodies, axons, dendrites, synapses, or projections, while activity-dependent signals can indicate altered responses in neural networks. These measurements help relate cellular or circuit-level patterns to disease-associated conditions and to the effects of experimental manipulation.
A labeling experiment can combine anatomical information with signals that reflect neuronal function. Structural labels show which cells and projections are present, whereas activity-dependent reporters indicate responses involving neural signaling, intracellular calcium, or gene expression. Comparing these signals after an experimental manipulation allows researchers to examine both the affected network components and the associated functional response.