Tyramide Signal Amplification
Tyramide Signal Amplification - Related Videos
14:21
High Resolution Fluorescent In Situ Hybridization in Drosophila Embryos and Tissues Using Tyramide Signal Amplification
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Cited by 25 •
2017
The described RNA in situ hybridization protocol allows the detection of RNA in whole Drosophila embryos or dissected tissues. Using 96-well microtiter plates and tyramide signal amplification, transcripts can be detected at high resolution, sensitivity, and throughput, and at a relatively low cost.
09:15
Tyramide Signal Amplification for the Immunofluorescent Staining of ZBP1-Dependent Phosphorylation of RIPK3 and MLKL After HSV-1 Infection in Human Cells
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Cited by 1 •
2022
Tyramide signal amplification during immunofluorescent staining enables the sensitive detection of phosphorylated RIPK3 and MLKL during ZBP1-induced necroptosis after HSV-1 infection.
09:36
Visualization of Mitochondrial DNA Replication in Individual Cells by EdU Signal Amplification
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Cited by 11 •
2010
We developed a sensitive technique to label newly synthesized mitochondrial DNA (mtDNA) in individual cells in order to study mtDNA biogenesis. The technique combines the incorporation of EdU together with a tyramide signal amplification (TSA) protocol to visualize mtDNA replication within subcellular compartments of neurons.
09:44
Rapid Amplification of cDNA Ends
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2023
Source: Pablo Sanchez Bosch2, Sean Corcoran2 and Katja Brückner1,2,3 1Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research 2Department of Cell and Tissue Biology, 3Cardiovascular Research Institute, University of California San Francisco, San Francisco, CA, USA Rapid Amplification of cDNA Ends (RACE) is a technique that allows amplification of full-length cDNA from mRNA by extending to the 3’ or 5’ end, even without prior knowledge of the sequence (Frohman et al.,...
09:06
MicroRNA Amplification and Recognition through Locked-nucleic-acid In situ Hybridization as a Novel Detection and Quantification Method
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Cited by 1 •
2025
The protocol describes a tandem immunofluorescence hybridization assay with formalin-fixed paraffin-embedded tissue to detect and quantify microRNA and multiplexed proteins simultaneously.
FAQs
Horseradish peroxidase uses hydrogen peroxide to convert labeled tyramide into short-lived reactive intermediates. These intermediates react with nearby tyrosine residues, depositing multiple reporter molecules around the enzyme-associated target. Because one enzymatic reaction can generate many deposited labels, the method strengthens signals from molecular targets that produce little detectable fluorescence or chromogenic output with conventional labeling.
Reactive tyramide intermediates bind covalently to nearby tyrosine residues rather than producing a broadly distributed signal. This local deposition keeps reporter molecules concentrated near the original detection site, allowing the amplified signal to remain spatially informative. That property is particularly valuable when researchers need to determine where a weak molecular target is located within a biological sample.
The reporter attached to tyramide determines whether the amplified result is observed as fluorescence or as a chromogenic signal. The enzyme-associated target provides the local site where deposition occurs, while the deposited reporter molecules determine signal visibility. Together, these components connect target recognition with the imaging format used for biological analysis.
Conventional labeling may produce insufficient signal when a target is present at low abundance. Tyramide Signal Amplification addresses this limitation by depositing many reporter molecules at the site associated with horseradish peroxidase activity. The resulting increase in signal visibility can make weak targets detectable while retaining the localized pattern needed for interpretation.
The assay conceptually links target detection, enzyme activity, reporter conversion, and local deposition. An enzyme-associated detection event is followed by exposure of labeled tyramide to horseradish peroxidase and hydrogen peroxide. Reactive tyramide intermediates then deposit reporters near the target, after which the accumulated fluorescence or chromogenic output can be visualized.
Tyramide Signal Amplification supports immunofluorescence, immunohistochemistry, and in situ hybridization. In each setting, it can increase the visibility of a weak molecular signal within a biological sample. The method is therefore useful when researchers need to detect protein- or nucleic-acid-associated targets while retaining information about their distribution in the sample.
It is especially useful for low-abundance targets, samples in which conventional labeling gives inadequate visibility, and experiments requiring localized detection. The method also supports multiplexed analysis, where researchers examine multiple signals within the same biological context. Its value comes from combining stronger reporter output with preservation of spatial information for interpreting target distribution.