Aberrant Crypt Foci
Aberrant Crypt Foci - Related Videos
04:37
Intestinal Crypts Isolation: A Method to Isolate Whole Crypts from Small Intestine of Murine Model
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2023
In this video, we demonstrate a technique to isolate whole crypts from a mouse’s small intestine. The isolated whole crypts can be used to propagate long-lived and self-renewing 3D organoids in vitro.
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.
08:48
Quantitation of γH2AX Foci in Tissue Samples
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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
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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.
08:48
Analysis of the Ambient Particulate Matter-induced Chromosomal Aberrations Using an In Vitro System
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Cited by 3 •
2016
This protocol describes techniques for the quantification and characterization of chromosomal aberrations in vitro in RAW264.7 mouse macrophages after treatment with ambient air particulate matter.
FAQs
Genetic and cellular alterations can disturb the coordinated processes that maintain colonic crypts, including epithelial proliferation, differentiation, and tissue renewal. As these controls become disrupted, crypts may enlarge, develop irregular architecture, or stain more intensely than surrounding tissue. These structural changes provide a visible connection between altered cellular behavior and early stages of colorectal carcinogenesis.
Morphology adds information beyond simply counting lesions. Investigators examine features such as crypt enlargement, irregularity, and staining intensity because these characteristics reflect differences in the extent of architectural disruption. Since not every focus progresses to cancer, combining lesion number with morphology can help researchers characterize early neoplastic change without treating every observed focus as an inevitable tumor.
Methylene blue staining can make abnormal crypt patterns detectable in colon tissue by emphasizing differences in staining intensity and architecture. This visual contrast supports recognition and quantification of lesions during research assessment. The resulting observations allow investigators to compare the burden and appearance of early abnormal areas across experimental conditions or tissue samples.
A typical research assessment uses colon tissue, applies a staining procedure such as methylene blue, and examines the resulting crypt patterns for enlargement, irregularity, or increased staining. Investigators then quantify the detected foci and may record their morphology. This workflow produces measurements that can be used to study early colorectal carcinogenesis and compare experimental groups.
Animal models provide an experimental setting in which investigators can examine the appearance and frequency of abnormal crypt lesions under defined research conditions. Comparing these measurements helps researchers study tumor initiation and assess carcinogenic risk. Models also allow evaluation of chemopreventive interventions, linking changes in lesion burden or morphology with potential effects on early colorectal neoplastic processes.
Researchers can use lesion number and morphology as research markers when testing chemopreventive interventions. Differences between treated and comparison groups may indicate whether an intervention influences early abnormal crypt development or its visible characteristics. These measurements do not establish that every focus would become cancer, but they help evaluate effects on processes associated with colorectal tumor initiation.