Fluorine Labeling
Fluorine Labeling - Related Videos
08:42
Using Multi-fluorinated Bile Acids and In Vivo Magnetic Resonance Imaging to Measure Bile Acid Transport
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Cited by 8 •
2016
Tools to diagnose bile acid malabsorption and measure bile acid transport in vivo are limited. An innovative approach in live animals is described that utilizes combined proton (1H) plus fluorine (19F) magnetic resonance imaging; this novel methodology has translational potential to screen for bile acid malabsorption in clinical practice.
01:13
Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene
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2023
Bromination and chlorination of aromatic rings by electrophilic aromatic substitution reactions are easily achieved, but fluorination and iodination are difficult to achieve. Fluorine is so reactive that its reaction with benzene is difficult to control, resulting in poor yields of monofluoroaromatic products. To address this, Selectfluor reagent is used as a fluorine source in which a fluorine atom is bonded to a positively charged nitrogen. Unlike fluorine, iodine is highly unreactive for...
09:19
Simultaneous Label-Free Autofluorescence Multi-Harmonic Microscopy
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Cited by 3 •
2025
This protocol presents a step-by-step guide for the Simultaneous Label-free Autofluorescence Multi-harmonic (SLAM) microscopic technique, including details on how to generate the laser light source, prepare a tissue sample, conduct imaging, and analyze the data. SLAM advances nonlinear microscopy by measuring four complementary label-free contrasts to investigate the tissue microenvironment.
09:24
Application and Methodology of the Non-destructive 19F Time-domain NMR Technique to Measure the Content in Fluorine-containing Drug Products
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Cited by 2 •
2017
A simple and non-destructive technique that measures the average content of drug substances in formulated drug products containing fluorine using low-field fluorine-19 (19F) time-domain (TD) nuclear magnetic resonance (NMR) is presented here. The technique can be applied to the development and manufacturing of drugs in the pharmaceutical industry.
08:28
Metabolic Labeling
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2023
Metabolic labeling is used to probe the biochemical transformations and modifications that occur in a cell. This is accomplished by using chemical analogs that mimic the structure of natural biomolecules. Cells utilize analogs in their endogenous biochemical processes, producing compounds that are labeled. The label allows for the incorporation of detection and affinity tags, which can then be used to elucidate metabolic pathways using other biochemical analytical techniques, such as SDS-PAGE...
FAQs
Fluorine-18 has a radioactive decay pathway that produces positrons. Those positrons generate detectable signals in PET, allowing the scanner to represent where the labeled tracer is located in a living system. This makes the isotope useful for linking molecular presence with disease-associated targets or other biological features under investigation.
Stable fluorine can alter a molecule’s lipophilicity, metabolic stability, and target binding. These changes may influence how the molecule behaves in biological systems, including how it interacts with a target or persists during investigation. Consequently, stable fluorine labeling can support molecular design even when imaging through radioactive decay is not the primary goal.
The choice depends on the desired information. Fluorine-18 provides radioactive decay that can be detected with PET, making it suited to visualizing tracer distribution and disease-associated targets in living systems. Stable fluorine instead contributes chemical effects such as altered lipophilicity, metabolic stability, or target binding, without serving the same radioactive imaging role.
Labeling chemistry must preserve the molecule’s biological activity while introducing the fluorine atom or fluorinated isotope. If the modification changes target binding or other relevant behavior too substantially, the tracer may no longer represent the process being studied. Controlled isotope handling is also essential when radioactive fluorine-18 is used in medical research.
Researchers can incorporate fluorine by replacing hydrogen or by substituting a functional group with fluorine-18 in a tracer. The resulting molecule must retain the biological activity needed for the investigation. This strategy connects the chemical modification with a later objective, such as PET detection, target visualization, or measurement of behavior in living systems.
Fluorine-labeled tracers can help visualize disease-associated targets, measure drug distribution, and study pharmacokinetics. PET detection is especially useful when fluorine-18 produces a detectable signal from a tracer. These measurements give researchers a way to examine how a molecule behaves in living systems rather than relying only on isolated chemical or biological tests.
The approach supports diagnosis, therapeutic development, and precision medicine. Researchers may apply it to investigate disease-associated targets, follow where a drug distributes, or characterize pharmacokinetics in living systems. Its value depends on matching the label and labeling chemistry to the intended medical question while maintaining biological activity and controlling isotope handling.