Gallium-68 Tracer
Gallium-68 Tracer - Related Videos
09:06
Development of a 68Gallium-Labeled D-Peptide PET Tracer for Imaging Programmed Death-Ligand 1 Expression
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Cited by 6 •
2023
This study developed a noninvasive and real-time method to evaluate the distribution of programmed death-ligand 1 in the whole body, based on positron emission tomographic imaging of [68Ga] D-dodecapeptide antagonist. This technique has advantages over conventional immunohistochemistry and improves the efficiency of identifying appropriate patients who will benefit from immune checkpoint blockade therapy.
11:22
Investigations on the Ga(III) Complex of EOB-DTPA and Its 68Ga Radiolabeled Analogue
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Cited by 2 •
2016
A procedure for the isolation of EOB-DTPA and subsequent complexation with natural Ga(III) and 68Ga is presented herein, as well as a thorough analysis of all compounds and investigations on labeling efficiency, in vitro stability and the n-octanol/water distribution coefficient of the radiolabeled complex.
![PET/CT With [<sup>68</sup>Ga]-NOTA-FAP-2286 for Imaging of Tendon Injuries in Rat Achilles Tendon Injury Models](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F67717.jpg%3Fv%3D2026-08-11%252008%253A27%253A06&w=750&q=75)
04:05
PET/CT With [68Ga]-NOTA-FAP-2286 for Imaging of Tendon Injuries in Rat Achilles Tendon Injury Models
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2025
Here, we present a protocol to utilize [68Ga]-NOTAFAP-2286 PET/CT imaging to exhibit high sensitivity in detecting and precisely localizing tendon injuries.
09:00
An In Vitro Enzymatic Assay to Measure Transcription Inhibition by Gallium(III) and H3 5,10,15-tris(pentafluorophenyl)corroles
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Cited by 1 •
2015
Gallium(III) 5,10,15-(tris)pentafluorophenylcorrole and its freebase analogue exhibit low micromolar cell cytotoxicity. This manuscript describes an RNA transcription reaction, imaging RNA with an ethidium bromide-stained gel, and quantifying RNA with UV-Vis spectroscopy, in order to assess transcription inhibition by corroles and demonstrates a straightforward method of evaluating anticancer candidate properties.
03:37
Tracer Molecule Delivery in the Cisterna Magna: A Method to Deliver Fluorescent Tracer Molecules via Direct Cannulation of the Cisterna Magna in Pig
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2025
This video describes the protocol for tracer molecule delivery via direct cannulation of the cisterna magna in a pig brain. This method helps visualize the distribution of cerebrospinal fluid in the glymphatic system.
FAQs
The chelator provides a coordination environment that binds gallium-68 and forms a metal complex. In a DOTA-based ligand, this coordination framework is attached to the targeting molecule and helps keep the radionuclide associated with the tracer under physiological conditions. This chemical stabilization supports the tracer’s intended behavior during molecular imaging.
The two components contribute different functions. The targeting molecule directs the tracer toward specific receptors or tissues, creating the biological selectivity needed to study molecular distribution. Gallium-68, by contrast, supplies the positron-decay signal detected by PET. Separating these roles explains how one chemical construct connects receptor biology with an image.
Variation in receptor expression can alter where the targeting component is directed, producing differences in tracer distribution. This relationship gives Gallium-68 tracers a role in studying tumor biology and disease distribution, rather than merely showing anatomy. The resulting images can therefore be interpreted in relation to molecular targets.
Positron decay from gallium-68 produces detectable signals that PET uses to reconstruct images. These images connect the location of tracer-related activity with the targeting molecule’s receptor or tissue preference. Consequently, the method can provide a noninvasive view of molecular processes, including receptor expression and disease distribution.
A basic workflow begins by combining gallium-68 with a chelator-containing targeting ligand so the radionuclide becomes associated with the intended molecular target. The resulting tracer is then administered, after which its distribution is examined with PET. This sequence links coordination chemistry, molecular targeting, and image reconstruction in one experiment.
Chemistry is central because chelation determines how gallium-68 is held within the tracer, while the attached targeting molecule determines which receptors or tissues are investigated. This combination supports noninvasive research on tumor biology, receptor expression, and disease distribution, with relevance to diagnostic imaging and precision medicine.