Immunofluorescence Method
Immunofluorescence Method - Related Videos
04:05
An Immunofluorescence Method to Measure the Neutralization of Human Cytomegalovirus
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2025
Source:Matthew J Murray1, Gary R McLean2,3, Matthew B Reeves11Institute of Immunity and Transplantation, University College London.2Cellular and Molecular Immunology Research Centre, London Metropolitan University.3National Heart and Lung Institute, Imperial College London.This video demonstrates an immunofluorescence assay designed to measure the neutralization of Human Cytomegalovirus (HCMV). Virus-specific antibodies are mixed with the virus and incubated with human fibroblast cells. The...
08:54
An Immunofluorescent Method for Characterization of Barrett’s Esophagus Cells
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2014
There is a discernible need for improved information on molecular drivers of Barrett’s Esophagus. Immunofluorescent staining is a useful technique for understanding the effects of cell signaling on cell morphology. We present a simple, effective protocol for the use of immunofluorescent staining to assess therapeutic treatment in Barrett’s Esophagus cells.
04:32
Immunofluorescence Assay: A Method to Identify Tumor Cells Captured on a Medical Wire
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2023
This video describes the technique of immunofluorescence staining of circulating tumor cells captured on a functionalized medical wire. The functionalized wire allows isolation of CTCs in vivo, directly from patient’s blood...
09:56
Immunofluorescence Microscopy: Immunofluorescence Staining of Paraffin-Embedded Tissue Sections
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2023
Source: Thomas Chaffee1, Thomas S. Griffith2,3,4, and Kathryn L. Schwertfeger1,3,4 1 Department of Lab Medicine and Pathology, University of Minnesota, Minneapolis, MN 55455 2 Department of Urology, University of Minnesota, Minneapolis, MN 55455 3 Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455 4 Center for Immunology, University of Minnesota, Minneapolis, MN 55455 Pathologic analyses of tissue sections can be used to obtain a better understanding of normal tissue...
06:15
An In Vivo Immunofluorescence Localization Method to Study Antibody Biodistribution
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2025
This video demonstrates an in vivo immunofluorescence localization (IVIL) technique to study the biodistribution of tumor-targeting antibodies in a murine model of breast cancer. Upon the intravenous injection of a tumor-specific antibody in the mouse, the tumor is surgically isolated, and the localization of the antibody within the tumor tissue is confirmed via ex vivo immunostaining.
FAQs
Signal specificity depends first on how the primary antibody recognizes its target antigen. A fluorescent secondary antibody can bind the primary antibody and amplify the detectable signal, whereas a directly fluorescent primary antibody provides a more direct labeling route. This distinction affects staining design and helps researchers interpret whether observed fluorescence corresponds to the intended antigen distribution.
Sample preparation determines which targets remain accessible to antibodies. Fixation preserves the sample for imaging, while permeabilization can be added when antibodies must enter cells or tissues to reach less accessible antigens. Because these steps affect antigen accessibility, they are important conditions for obtaining a meaningful pattern of cellular or tissue localization.
Multicolor labeling allows several antigens to be examined in the same specimen through distinct fluorescent signals. In immunology and infection studies, this makes it possible to compare a pathogen-associated signal with host proteins and assess where those targets occur relative to one another. The resulting spatial information can reveal changes in antigen distribution during infection.
A basic workflow begins with a fixed sample, followed by permeabilization when needed, antibody binding, and fluorescence microscopy. The primary antibody is selected for the antigen of interest; a fluorescent secondary antibody may then bind that primary antibody before imaging. This sequence connects sample preparation, target recognition, signal generation, and microscopic detection in one analytical procedure.
Using a fluorescent secondary antibody separates target recognition from signal labeling: the primary antibody provides antigen recognition, while the secondary antibody supplies fluorescence and can amplify the signal. Alternatively, the primary antibody itself may be fluorescently labeled. The choice changes the labeling arrangement and is especially relevant when several targets must be visualized together.
Immunofluorescence can show more than whether an antigen is present. Its images support analysis of antigen distribution and cellular localization, including changes associated with infection. Investigators can use these patterns to identify microorganisms, map host proteins, examine changes in immune responses, and study interactions between pathogens and their hosts.