Mrna In Situ Hybridization
Mrna In Situ Hybridization - Related Videos
07:00
Visualization and Analysis of mRNA Molecules Using Fluorescence In Situ Hybridization in Saccharomyces cerevisiae
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Cited by 25 •
2013
This protocol describes an experimental procedure for performing Fluorescence in situ Hybridization (FISH) for counting mRNAs in single cells at single-molecule resolution.
08:00
Whole-Mount In Situ Hybridization
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2023
Whole-mount in situ hybridization (WMISH) is a common technique used for visualizing the location of expressed RNAs in embryos. In this process, synthetically produced RNA probes are first complementarily bound, or "hybridized," to the transcripts of target genes. Immunohistochemistry or fluorescence is then used to detect these RNA hybrids, revealing spatial and temporal patterns of gene expression. Unlike traditional in situ hybridization techniques, which require thin tissue sections whose...
10:24
A High Throughput in situ Hybridization Method to Characterize mRNA Expression Patterns in the Fetal Mouse Lower Urogenital Tract
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Cited by 49 •
2011
Here, we describe an efficient high throughput in situ hybridization (ISH) method for visualizing patterns of mRNA expression in developing fetal mouse prostate tissue sections. The method can be easily adapted to visualize mRNA expression patterns in other mouse tissues or in tissues from other species.
12:31
Zebrafish Whole Mount High-Resolution Double Fluorescent In Situ Hybridization
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Cited by 133 •
2009
Whole mount in situ hybridization is one of the most widely used techniques in developmental biology. Here, we present a high-resolution double fluorescent in situ hybridization protocol for analyzing the precise expression pattern of a single gene and for determining the overlap of the expression domains of two genes. We include a propidium iodide nuclear counter-stain to highlight tissue organization.
12:15
In Situ Hybridization for the Precise Localization of Transcripts in Plants
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Cited by 68 •
2011
The in situ hybridization protocol described here allows a direct localization of mRNA and small RNA expression at the cellular level with high sensitivity and specificity. The procedure is optimized for paraffin-embedded plant tissue sections, is applicable to a wide range of plants and tissues, and can be completed within ten days.
FAQs
Probe specificity comes from sequence complementarity. A probe is designed with a sequence that matches the target mRNA, allowing it to bind that transcript during hybridization while unrelated transcripts are not the intended target. The label attached to the probe does not identify the RNA by itself; it makes the selected transcript detectable after binding. This links molecular recognition to a visible location.
Hybridization conditions are central because they govern whether the complementary probe and target mRNA bind in a way that can be visualized. If the conditions do not support the intended interaction, the resulting signal may not accurately represent transcript distribution. Thus, experimental interpretation depends not only on probe sequence but also on maintaining controlled conditions during the binding step.
Fluorescent and enzymatic detection provide two distinct ways to read the bound probe. Fluorescence reveals labeled locations through emitted light, whereas an enzymatic color reaction produces a visible colored signal. The underlying recognition event remains probe binding to the target mRNA; the detection format changes how that spatial pattern is observed and recorded.
Preserving tissue architecture allows expression patterns to be assigned to particular cell types, developmental stages, or tissue regions rather than treated as a single measurement from the entire sample. This spatial information can reveal localized gene activity and relationships among tissue areas. Consequently, mRNA in situ hybridization connects transcript detection with biological organization, not simply with whether a transcript exists.
A typical workflow begins with fixed cells or tissue sections, followed by application of a labeled nucleic acid probe. The sample is then placed under controlled hybridization conditions so the probe can bind its complementary mRNA. Finally, the bound label is visualized using fluorescence or an enzymatic color reaction. Each stage preserves the link between transcript identity and tissue location.
This method is especially useful when the research question concerns where expression occurs, not only whether a transcript is present. It can compare patterns among cell types, developmental stages, or tissue regions. That makes it valuable for examining gene regulation and tissue organization, where a location-specific pattern may carry biological meaning that a nonspatial measurement would not show.
In developmental biology, spatial transcript patterns can be examined across embryonic stages to determine how gene activity is distributed as tissues form. Comparing sections or stages can show whether expression remains localized or changes across development. The technique therefore supports investigations of embryonic development while retaining the anatomical context needed to relate expression patterns to tissue organization.
Applications extend to disease mechanisms and cellular responses because mRNA expression patterns can be examined within the relevant tissue context. Researchers can ask whether expression differs among tissue regions or cell types rather than averaging the entire specimen. These observations help connect gene regulation with biological changes occurring in organized tissues.