Fluorescent Dna Staining
Fluorescent Dna Staining - Related Videos
05:59
Application of the DNA-Specific Stain Methyl Green in the Fluorescent Labeling of Embryos
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Cited by 24 •
2015
A method for fluorescent staining of fixed biological material with the specific DNA label methyl green is described. Methyl green is used in a diluted aqueous solution and is very resistant to photobleaching. Its far-red emission allows for deep specimen imaging, making it particularly adequate for whole embryos.
04:33
Extracellular DNA Staining: A Method to Identify Extracellular DNA in FFPE Tissue Sections
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2023
This video describes the technique of staining extracellular DNA in FFPE tissue sections. The stained extracellular DNA can be quantitated to determine the efficacy of any therapeutic treatment that leads to the death of cancer cells.
03:32
Ethanol Fixation and DAPI Staining: A Method to Visualize DNA in C. elegans
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2023
Here, we describe a technique used to visualize genomic DNA in fixed, intact nematodes. The video includes an example protocol to count chromatin in unfertilized C. elegans oocytes.
04:09
Assessing DNA Damage Foci: To Identify Radiation-Induced DNA Damage Foci in Cancer Cell Line Using Immunofluorescence Staining
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2023
This video describes a protocol to detect radiation-induced DNA repair foci in the colon cancer cell lines using immunofluorescence staining. DNA repair proteins get activated at the DNA damage site; therefore, we can detect them using specific antibodies and visualize them under a fluorescence microscope.
10:31
In Situ Labeling of Mitochondrial DNA Replication in Drosophila Adult Ovaries by EdU Staining
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Cited by 16 •
2016
Drosophila oogenesis continues to be exceptionally useful in the study of mitochondrial proliferation and inheritance. This manuscript describes a detailed protocol used to label the replicating mitochondrial DNA (mtDNA) in Drosophila adult ovaries with 5-ethynyl-2´-deoxyuridine (EdU), which facilitates uncovering mechanisms associated with mitochondrial inheritance that were previously debatable.
FAQs
Fluorescent DNA staining produces a signal whose strength and location depend on how probes associate with cellular DNA and on excitation at a suitable wavelength. Binding or intercalation links the probe to genetic material, while the recorded intensity and distribution provide measurable information about DNA within individual cells.
Microscopy records the spatial distribution of fluorescent DNA within individual cells, supporting nuclear imaging and examination of cellular structure. Flow cytometry records fluorescence from cells for quantitative DNA-content analysis. Choosing between these approaches depends on whether the experiment prioritizes visual localization, measurement of genetic material, or comparison of cellular states across conditions.
Fluorescence intensity and distribution can indicate differences in DNA content and help assess cell-cycle status. Changes in the arrangement or appearance of cellular DNA may also support evaluation of structural changes associated with cell death or malignancy. These measurements allow researchers to compare individual cells and identify differences among experimental groups.
A basic workflow labels cellular DNA with fluorescent probes, exposes the labeled material to excitation at a suitable wavelength, and records the resulting fluorescence. Researchers can collect images by microscopy or quantitative measurements by flow cytometry. The recorded signal is then compared across cells or experimental conditions to assess DNA-related differences.
In cancer research, the method is useful for characterizing tumor cells and examining features linked with malignancy. It supports nuclear imaging, DNA-content analysis, and cell-cycle assessment, allowing researchers to distinguish cellular states within or between samples. These measurements can provide a quantitative and spatial basis for studying tumor biology.
Researchers can compare fluorescence intensity, DNA distribution, and DNA content before and after experimental treatment or between different conditions. Such comparisons may reveal altered cell-cycle status or structural changes associated with cell death. The method therefore helps evaluate how tumor cells respond and provides both spatial and quantitative information for interpreting those responses.