Cytosolic Foci Analysis
Cytosolic Foci Analysis - Related Videos
04:09
Assessing DNA Damage Foci: To Identify Radiation-Induced DNA Damage Foci in Cancer Cell Line Using Immunofluorescence Staining
0 Views •
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.
08:48
Quantitation of γH2AX Foci in Tissue Samples
0 Views •
Cited by 7 •
2010
Quantitation of DNA double-strand breaks on the basis of γH2AX foci has become an invaluable tool, particularly in radiation biology, for the evaluation of tissue radiosensitivity and effects of radiation modifying compounds. Here we demonstrate the use of an immunofluorescence assay for quantitation of γH2AX foci in tissue samples.
06:53
Quantification of γH2AX Foci in Response to Ionising Radiation
0 Views •
Cited by 23 •
2010
Quantification of DNA double-strand streaks using γH2AX formation as a molecular marker has become an invaluable tool in radiation biology. Here we demonstrate the use of an immunofluorescence assay for quantification of γH2AX foci after exposure of cells to radiation.
09:33
Methods to Classify Cytoplasmic Foci as Mammalian Stress Granules
0 Views •
Cited by 33 •
2017
Stress Granules (SGs) are nonmembranous cytoplasmic structures that form in cells exposed to a variety of stresses. SGs contain mRNAs, RNA-binding proteins, small ribosomal subunits, translation-related factors, and various cell signaling proteins. This protocol describes a workflow that uses several experimental approaches to detect, characterize, and quantify bona fide SGs.
08:08
Measurement of Cytosolic Ca2+ in Isolated Contractile Lymphatics
0 Views •
Cited by 24 •
2011
We introduce an approach to evaluate the cytosolic Ca2+ concentration in isolated lymphatics to study Ca2+-dependent and Ca2+-sensitizing mechanisms of lymphatic smooth muscle contraction.
FAQs
The analysis relies on differences in fluorescence concentration, allowing discrete, concentrated regions to be evaluated separately from more diffuse cytoplasmic signal. Applying consistent criteria for identifying these regions is important because detection choices directly affect measured focus number, size, and intensity across experimental conditions. This improves the reliability of comparisons between cells or treatments.
Focus number, size, intensity, and spatial distribution provide complementary readouts. Number can indicate changes in how many structures are present, while size and intensity describe their characteristics within the image. Distribution adds positional context, helping determine whether foci remain similarly arranged or become redistributed under a treatment or another defined experimental condition.
Cytoplasmic organization may change between cells, treatments, or points in time, so measurements are meaningful only when the comparison conditions are specified. A consistent framework allows differences in focus properties to be interpreted as changes in intracellular organization rather than as ambiguous variation between images. This supports clearer quantitative conclusions from fluorescence-based observations.
A typical workflow begins with fluorescence images of cells and separates discrete concentrated regions from the surrounding cytosol. It then evaluates focus number, size, intensity, and spatial distribution using the same analytical framework across images. The resulting measurements can be organized for objective comparisons between cells or treatments conducted under defined experimental conditions.
It is useful when an experiment seeks measurable evidence that cytoplasmic organization differs between cells or experimental treatments. Instead of relying only on visual impressions, researchers can compare numerical properties of foci, including their abundance, dimensions, signal intensity, and arrangement. These measurements support objective assessment of treatment-associated changes in intracellular organization.
Changes in focus number, size, intensity, or spatial distribution can indicate that cellular components assemble into concentrated structures, redistribute within the cytoplasm, or change over time. The measurements therefore characterize how organization shifts, not merely whether foci are present. In biology, these quantitative patterns support studies of dynamic intracellular organization and component behavior.