Dapi Fluorescence
Dapi Fluorescence - Related Videos
03:32
Ethanol Fixation and DAPI Staining: A Method to Visualize DNA in C. elegans
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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.
06:04
C. elegans Gonad Dissection and Freeze Crack for Immunofluorescence and DAPI Staining
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Cited by 7 •
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This is a commonly used method for C. elegans gonad dissection followed by freeze crack, which produces germline samples for immunofluorescence via antibody staining, or for simple DAPI staining to visualize DNA. This protocol has been successful for undergraduates in a research lab and in a course-based undergraduate research experience.
03:23
Cell Death Screening Using DAPI Staining: A Method for Rapid Screening of IR Induced Clonogenic Cell Death in Cancerous Cell Lines
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2023
This video demonstrates the methodology to screen for major cell death profiles in ionizing radiation (IR) induced cancer cell lines using DAPI staining assay. The DAPI-stained nuclei of target cells undergoing cell death exhibit distinct morphologies and can be easily identified by fluorescence microscopy.
03:39
Fluorescent Labeling of Glioma Cells: A Lentiviral Vector-based Transfection Method to Obtain Glioma Cells Expressing Fluorescent Protein for Deep Tissue Imaging
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11:01
Automated Imaging and Analysis for the Quantification of Fluorescently Labeled Macropinosomes
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Cited by 7 •
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Automated assays using multi-well microplates are advantageous approaches for identifying pathway regulators by allowing the assessment of a multitude of conditions in a single experiment. Here, we have adapted the well-established macropinosome imaging and quantification protocol to a 96-well microplate format and provide a comprehensive outline for automation using a multi-mode plate reader.
FAQs
The dye binds preferentially to adenine-thymine-rich regions within double-stranded DNA. This binding produces the strong nuclear signal that distinguishes DNA-containing structures from surrounding cellular material. Because the fluorescence reflects DNA distribution, researchers can examine nuclear number, shape, and organization rather than simply viewing overall cell morphology.
Illumination with ultraviolet or near-ultraviolet light excites DAPI after it has bound to DNA, causing the dye to emit bright blue fluorescence. The signal therefore depends on both DNA-associated dye and appropriate excitation. In microscopy, this emission provides a distinct channel that can be evaluated alongside other fluorescent markers.
DAPI fluorescence is commonly applied to fixed and permeabilized cells or tissue sections, conditions that make nuclear DNA accessible for staining while preserving the specimen for microscopy. This preparation supports visualization of nuclear structure within intact cellular or tissue arrangements, allowing DNA signals to be interpreted in relation to neighboring cells and tissue architecture.
A basic workflow uses fixed and permeabilized cells or tissue sections, applies the DNA-binding dye, and examines the prepared sample with ultraviolet or near-ultraviolet illumination. Researchers then record the blue nuclear signal and may compare it with other fluorescent markers. This sequence supports assessment of nuclear distribution together with additional cellular features.
Researchers use the DAPI channel alongside other fluorescent markers when they need a nuclear reference for interpreting labeled cellular structures. The nuclear signal helps relate other fluorescence patterns to cell position and organization. In tissue sections, this combined approach can also connect marker localization with broader tissue architecture and the arrangement of neighboring nuclei.
Changes in nuclear morphology can provide evidence of biological events such as cell division or cell death. Examining nuclear shape and organization, together with nuclear number, helps researchers identify differences in cellular state across a sample. The same observations can support studies of chromosome distribution and structural organization within cells or tissues.