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Itaconate biosynthesis was studied in intact cells of high-yield (RC4') and low-yield (CM85J) strains of the fungus Aspergillus terreus by methods (tracers, nuclear magnetic resonance spectroscopy, and mass spectroscopy) that did not interfere with metabolism. Itaconate formation in RC4' required de novo protein biosynthesis. Krebs cycle intermediates(More)
Recent studies have shown that cell migration can be monitored in vivo by magnetic resonance imaging after intracellular contrast agent incorporation. This is due to the dephasing effect on proton magnetization of the local magnetic field created by a labelled cell. Anionic iron oxide nanoparticles (AMNP) are among the most efficient and non-toxic contrast(More)
The combination of localized 2D 1H MR correlation spectroscopy and Hadamard encoding allows the simultaneous acquisition of multiple volumes of interest without an increase in the experimental duration, compared to single-voxel acquisition. In the present study, 2D correlation spectra were acquired simultaneously within 20 to 40 min in two voxels located in(More)
Dystrophin is a cytoskeletal membrane-bound protein expressed in both muscle and brain. Brain dystrophin is thought to be involved in the stabilization of gamma-aminobutyric acid (GABA)(A)-receptor (GABA(A)-R)clusters in postsynaptic densities (PSDs) at inhibitory synapses onto pyramidal cells, and its loss has been linked to cognitive impairments in(More)
The vacuolar pH and the trans-tonoplast DeltapH modifications induced by the activity of the two proton pumps H(+)-ATPase and H(+)-PPase and by the proton exchanges catalyzed by the Na(+)/H(+) and Ca(2+)/H(+) antiports at the tonoplast of isolated intact vacuoles prepared from Catharanthus roseus cells enriched in inorganic phosphate (Y Mathieu et al 1988(More)
Intracerebral glucose resonance was directly detected and resolved in vivo by two-dimensional shift-correlated (COSY) 1H NMR spectroscopy in anesthetized rats (n = 4). The relative changes in brain glucose concentration were measured by volume integration of the alpha-D-glucose cross peak in the 2D COSY spectra. This report demonstrates the possibility of(More)
2D COSY 1H NMR with surface coil has been used to resolve and assign cerebral metabolites which had previously been detected but could not be resolved or assigned in situ in the living animal by conventional 1D 1H NMR. A wide range of cerebral metabolites, including alanine, N-acetyl aspartate, aspartate, choline derivatives, creatine/phosphocreatine pool,(More)
For the first time, the (31)P nuclear magnetic resonance technique has been used to study the properties of isolated vacuoles of plant cells, namely the vacuolar pH and the inorganic phosphate content. Catharanthus roseus cells incubated for 15 hours on a culture medium enriched with 10 millimolar inorganic phosphate accumulated large amounts of inorganic(More)
This report describes the first 1H-1H phased spectrum obtained in vivo from the hind-leg muscles of an intact mouse. TOCSY correlations can follow the complete spin system and give a more detailed graph of each molecule than can COSY. TOCSY is also better suited than COSY for studying long fatty-acid chains. All the peaks are in phase in a TOCSY experiment(More)
N-methyl-D-aspartate (NMDA) is an agonist used to identify neuronal receptive sites for dicarboxylic amino acid neurotransmitters; NMDA receptors are implicated in neuronal damage of ischemic or hypoglycemic origin in newborns although involved mechanisms remain to be identified. In the present study, 31P magnetic resonance spectroscopy with fast (6/min)(More)