Tryptophan Metabolism Imaging
Tryptophan Metabolism Imaging - Related Videos
12:07
Chemical Modification of the Tryptophan Residue in a Recombinant Ca2+-ATPase N-domain for Studying Tryptophan-ANS FRET
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2021
ANS binds to the Ca2+-ATPase recombinant N-domain. Fluorescence spectra display a FRET-like pattern upon excitation at a wavelength of 295 nm. NBS-mediated chemical modification of Trp quenches the fluorescence of the N-domain, which leads to the absence of energy transfer (FRET) between the Trp residue and ANS.
05:41
Metabolic Profile Analysis of Zebrafish Embryos
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Cited by 42 •
2013
Zebrafish represent a powerful vertebrate model that has been under-utilised for metabolic studies. Here we describe a rapid way to measure the in vivo metabolic profile of developing zebrafish that allows the comparison of different mitochondrial function parameters between genetically or pharmacologically manipulated embryos, thereby increasing the applicability of this organism.
00:52
What is Metabolism?
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2019
Overview Metabolism represents all of the chemical activity in a cell, including reactions that build molecules (anabolism) and those that break molecules down (catabolism). Anabolic reactions require energy, whereas catabolic reactions provide it. Thus, metabolism describes how cells transform energy through a variety of chemical reactions, which are often made more efficient with the help of enzymes. Metabolism Is the Sum of All of the Chemical Reactions That Take Place in an Organism
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...
11:43
Hyperpolarized 13C Metabolic Magnetic Resonance Spectroscopy and Imaging
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Cited by 7 •
2016
Dynamic nuclear polarization with subsequent sample dissolution has enabled real-time studies of metabolism in biological systems. Hyperpolarized [1-13C]pyruvate was used to study lactate dehydrogenase activity in a prostate carcinoma cell line in vitro.
FAQs
A tracer can provide information about more than simple presence in a tissue. Imaging measurements may help estimate how much labeled material is taken up, how it is transported, and whether it is converted into downstream metabolites. Separating these stages helps researchers relate a spatial signal to biochemical handling rather than treating all detected activity as identical.
In PET-based studies, a radiolabeled tryptophan analog emits positrons. The resulting detectable signal is mapped by the imaging system, allowing researchers to estimate where the tracer accumulates and how strongly the associated pathway is active. The chemistry of the label therefore provides the physical signal, while the biological processing determines its distribution.
Tryptophan feeds multiple biochemical routes, including processes associated with serotonin synthesis and the kynurenine pathway. A change in regional tracer activity may therefore reflect altered handling through one pathway rather than a general change in all tryptophan chemistry. Distinguishing these pathway associations helps connect imaging patterns with specific molecular processes.
A study requires a labeled molecular tracer, an imaging technology capable of detecting its signal, and a biochemical interpretation linking the measured distribution to uptake, transport, or conversion. Radiolabeled tryptophan analogs are particularly relevant to PET because their positron emissions can be detected. Together, these components connect molecular labeling with spatial tissue information.
Researchers may use this approach when they need information about pathway activity in living tissue, not only anatomy. The method supports investigations of brain function, immune activation, cancer metabolism, and neurological disease. Because biochemical activity may change before structural abnormalities become apparent, metabolic imaging can provide an earlier view of disease-related or functional changes.
Its chemical value lies in tracing how an amino acid is handled through connected reaction pathways while preserving information about location in the body. Researchers can examine relationships among tracer uptake, transport, and metabolite formation, then associate those patterns with serotonin-related or kynurenine-related activity. This links molecular reaction behavior with tissue-level organization.