Auto Radiography
Auto Radiography - Related Videos
12:03
Receptor Autoradiography Protocol for the Localized Visualization of Angiotensin II Receptors
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Cited by 14 •
2016
Here we present a protocol to describe the localization of angiotensin II Type 1 receptors in the rat brain by quantitative, densitometric, in vitro receptor autoradiography using an iodine-125 labeled analog of angiotensin II.
10:16
Autoradiography as a Simple and Powerful Method for Visualization and Characterization of Pharmacological Targets
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Cited by 31 •
2019
The method of autoradiography is routinely used to study binding of radioligands to tissue sections for determination of qualitative or quantitative pharmacology.
08:39
Affinity Labeling Detection of Endogenous Receptors from Zebrafish Embryos
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Cited by 1 •
2016
A novel technique for the detection of low abundance endogenous receptors present in zebrafish embryos is described. We have named it AFLIP because it consists of affinity labeling of the receptor by its ligand linked to immunoprecipitation.
09:32
Optimized Analysis of Proteins from Xenopus Oocytes and Embryos by Immunoblotting
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2025
This article describes a protocol for analyzing proteins from Xenopus oocytes and embryos by immunoblotting. Collection steps are described, followed by steps corresponding to sample processing, SDS-PAGE, transfer, antibody staining, and imaging. The protocol emphasizes studying translational regulatory protein complexes with endogenous antibodies and antibodies against protein affinity tags.
05:00
Monitoring the Arrival of GFP-Tagged Surface Proteins to the Trans-Golgi Network Using Functionalized Nanobodies
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2025
This video demonstrates a method to study the uptake and retrograde transport of functionalized nanobodies to understand their intracellular trafficking pathways. By introducing radiolabelled sulfate and utilizing isolation and detection techniques, this method enables the study of endocytic uptake and trans-Golgi network arrival of cargo proteins.
FAQs
Signal strength reflects where the radioactive tracer is concentrated within the recorded sample. Areas containing more tracer produce stronger exposure on the photographic film or detector, whereas regions with less tracer generate weaker signals. This relationship allows researchers to compare molecular abundance across locations and connect distribution patterns with tissue structure or cellular activity.
The labeled substance determines which molecule or process becomes visible in the sample. Labels attached to DNA, RNA, proteins, metabolites, or drugs can reveal different biological distributions. Consequently, the same imaging principle can answer distinct questions, such as where a molecule accumulates, how it moves through tissue, or which cells contain it.
Autoradiography preserves the relationship between a molecular signal and its position in a tissue section, gel, or cell preparation. Instead of reporting only whether a labeled substance is present, it shows where the signal occurs relative to cellular or tissue organization. This spatial context helps relate molecular movement to biological structure and function.
A biological preparation containing a radioactive tracer is first positioned against photographic film or a radiation-sensitive detector. Emissions from the labeled material expose the recording medium, producing a pattern that can be examined for signal location and relative concentration. The resulting image is then interpreted alongside the sample’s cellular or tissue organization.
The technique can follow labeled DNA, RNA, proteins, metabolites, and drugs within biological samples. These measurements support investigations of gene expression, cell division, metabolism, and tissue organization. Its value comes from linking the location of a molecular signal with the biological process being studied, rather than examining molecular presence without spatial context.
Researchers compare the distribution of radioactive signals with the arrangement of cells or tissue regions in the preparation. Patterns may indicate where gene-related molecules, metabolic substances, or other labeled compounds occur during biological activity. In this way, autoradiography provides a bridge between molecular events and the structural organization that contains them.