Heat Induced Antigen Retrieval
Heat Induced Antigen Retrieval - Related Videos
09:38
Heat-Induced Antigen Retrieval: An Effective Method to Detect and Identify Progenitor Cell Types during Adult Hippocampal Neurogenesis
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Cited by 23 •
2013
During adult hippocampal neurogenesis, a distinct set of genetic markers are expressed when a quiescent neural stem cell sequentially progresses and develops into a functionally integrated neuron in the circuit. Using heat-induced antigen retrieval, progenitor cell types that are otherwise difficult to detect are identified with improved effectiveness.
10:48
SDS-PAGE/Immunoblot Detection of Aβ Multimers in Human Cortical Tissue Homogenates using Antigen-Epitope Retrieval
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Cited by 26 •
2010
We describe a technique for the preparation of clarified human cortical homogenates, protein separation by SDS-PAGE, antigen retrieval and immunoblotting with an antibody to the Aβ peptide. Using this protocol, we consistently detect monomeric and multimeric Aβ in cortical tissue from humans with Alzheimer's pathology.
03:52
Subcutaneous Injection of Bacterial Antigen to Induce Systemic Inflammation in a Murine Model
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2025
This video demonstrates the induction of systemic inflammation in an anesthetized mouse. The injection of mycobacterial antigen-adjuvant depots triggers cytokine release and localized inflammation. Lymphatic vessels open, enabling immune cell entry into lymph nodes and activation of T cells, which release pro-inflammatory cytokines, leading to widespread inflammation.
02:49
A Technique to Assess the Immune Response against an Antigen by Inducing Skin Inflammation
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2025
This video demonstrates an in vivo technique to assess a test antigen by inducing skin inflammation in a murine model. The test antigen—a hapten in an oil/acetone solution—is topically applied to the skin of the mouse ear, and inflammation of the skin is assessed after an adequate period.
04:08
Preparing an Antigen-Adjuvant Emulsion to Induce Autoimmune Encephalomyelitis
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2025
This video demonstrates an efficient homogenization technique to generate an antigen-adjuvant emulsion to induce experimental autoimmune encephalomyelitis (EAE) in a murine model. The emulsion contains an autoantigen — myelin oligodendrocyte glycoprotein (MOG) — in the water phase, surrounded by a continuous oil phase comprising an inactivated pathogenic bacteria. The emulsion ensures a sustained release of antigens for a prolonged immune response.
FAQs
Formaldehyde fixation can create cross-links and alter protein structure around an epitope, the molecular region recognized by an antibody. Heating tissue sections in an aqueous retrieval buffer helps break or relax these interactions, allowing the target region to become accessible again. This improves the likelihood that immunohistochemical or immunofluorescent staining will reveal the intended protein.
The aqueous buffer provides the chemical environment in which heating acts on fixation-related interactions. Its suitability, together with the selected temperature and heating duration, influences how effectively masked antigens become accessible. Appropriate conditions support stronger, more reliable antibody detection, whereas poorly controlled conditions may compromise the balance between antigen exposure and preservation of tissue morphology.
Temperature must be controlled because retrieval depends on sufficient heat to relax fixation-related interactions without unnecessarily damaging the section. Heating that is too limited may leave epitopes inaccessible, while unsuitable conditions can reduce preservation of tissue morphology. Optimizing temperature with heating time and buffer conditions therefore helps produce interpretable staining while maintaining the structural context of the specimen.
Paraffin-embedded specimens commonly contain fixed tissue in which formaldehyde-related cross-links can conceal protein targets from antibodies. Applying controlled heat in an appropriate aqueous buffer can restore access to those targets before staining. This makes the technique valuable when researchers need to examine protein distribution in archived or processed tissue while retaining the organization needed for biological interpretation.
After tissue fixation and section preparation, researchers expose the sections to an appropriate aqueous retrieval buffer and apply controlled heating for a defined period. The treated sections can then undergo antibody-based staining for immunohistochemistry or immunofluorescence. Temperature, duration, and buffer conditions are adjusted as needed to improve target detection while preserving the section's morphology.
By increasing antibody access to previously masked proteins, retrieval can make staining patterns more representative of antigen distribution in the tissue. Researchers can then assess cell identity, tissue organization, biomarker expression, and disease-related changes using immunohistochemistry or immunofluorescence. The resulting signal is most useful when interpreted alongside the preserved structural context of the section.