Immunofluorescence Technique
Immunofluorescence Technique - Related Videos
05:19
An Immunofluorescence Technique for Viral Protein Localization in Infected Cells
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2025
This video demonstrates a method for monitoring infected cell protein 0, ICP0 trafficking in herpes simplex virus-1 infection. Post-de novo synthesis, ICP0 translocates to the nucleus, later moving to the cytoplasm during infection progression. Immunofluorescence microscopy reveals and analyzes the protein's subcellular localization, offering insights into its trafficking across infection phases.
04:05
CTC Immunofluorescence Assay : A Technique to Characterize Circulating Tumor Cells
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2023
This video describes the Circulating Tumor Cells (CTC) Immunofluorescence assay, a technique to characterize the biomarkers on circulating tumor cells in non-small cell lung cancer patient samples. This assay could be used to monitor dynamic changes of the tumor and immune response, which may reflect the response to chemotherapy, radiation, and possible immunotherapy treatments.
05:05
Technique of Conjunctival Biopsy and Direct Immunofluorescence for Diagnosing Mucous Membrane Pemphigoid
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2025
Here, we present a protocol for harvesting and processing conjunctival biopsy to identify mucous membrane pemphigoid.
03:24
BrdU Immunofluorescence Staining: A Technique to Identify Cells in Different Phases of Cell Cycle
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2023
This video describes the protocol for BrdU immunofluorescence staining. The technique allows the identification of cells in different phases of cell cycle. Addition of DNA dyes and antibody labeling allows the detailed analysis of the fate of the S phase cells at later times.
03:44
A Double-Labeling Immunofluorescence Technique to Visualize Host and Pathogen Proteins in an Infected Cell
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2025
This video showcases double-labeling immunostaining with two different primary antibodies raised in the same species, binding specifically to parasite and host proteins. Furthermore, labeled secondary antibodies targeting these primary antibodies allow the distinct visualization of host and parasite proteins, facilitating the study of host-pathogen interaction.
FAQs
Direct immunofluorescence uses a fluorophore-conjugated primary antibody that binds the target antigen in the sample. Indirect immunofluorescence separates recognition from detection: an unlabeled primary antibody first binds the target, and a fluorescent secondary antibody then binds the primary antibody. This distinction provides two experimental formats for visualizing the same type of molecular target.
The fluorescent label converts antibody binding into a signal that can be detected under appropriate illumination. Because the label is attached either to the primary antibody or to a secondary antibody, the observed fluorescence indicates where the antibody-target interaction occurs within the biological sample. Microscopy then preserves the spatial information needed to relate protein presence to cellular structures.
Antibody specificity helps associate the fluorescent signal with a particular protein or other antigen, while spatial resolution shows where that target occurs in cells or tissues. Neither type of information alone is sufficient for many biological questions. Together, they allow researchers to connect molecular identity with cellular location, tissue organization, and changes in biological structure.
A typical workflow is organized around the biological sample, an antibody that recognizes the target, a fluorophore-based detection step, and microscopy under suitable illumination. In the direct format, the primary antibody carries the fluorophore; in the indirect format, an unlabeled primary antibody is followed by a fluorescent secondary antibody. These components determine how target recognition becomes an interpretable image.
Immunofluorescence can show the subcellular or tissue location of a protein, relationships between targets and cellular structures, and changes in tissue organization. Comparing fluorescence patterns across biological samples can therefore help investigate signaling-related changes, infection-associated alterations, or disease progression. The resulting images provide spatial evidence rather than only indicating that a target exists in the sample.
The method is useful when researchers need molecularly specific information together with visual context. In cell biology, it can examine protein localization and cellular structures; in pathology, it can help assess tissue organization and disease-associated changes. Developmental biology and biomedical research also use the approach to study signaling, infection, and progression of biological conditions.