In vivo 1H NMR measurement of glycine in rat brain at 9.4 T at short echo time.
Details
Serval ID
serval:BIB_34F0E72E118E
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
In vivo 1H NMR measurement of glycine in rat brain at 9.4 T at short echo time.
Journal
Magnetic Resonance in Medicine
ISSN
1522-2594 (Electronic)
ISSN-L
0740-3194
Publication state
Published
Issued date
2008
Volume
60
Number
3
Pages
727-731
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov'tPublication Status: ppublish
Abstract
Glycine is an amino acid present in mammalian brain, where it acts as an inhibitory and excitatory neurotransmitter. The two detectable protons of glycine give rise to a singlet at 3.55 ppm that overlaps with the more intense myo-inositol resonances, and its measurement has traditionally required specific editing efforts. The aim of the current study was to reduce the signal intensity of myo-inositol relative to that of glycine by exploiting the fast signal J-evolution of the myo-inositol spin system when using a single spin-echo localization method we recently introduced. Glycine was detected at TE = 20 ms with an average Cramér-Rao lower bound (CRLB) of 8.6% +/- 1.5% in rat brain (N = 5), at 9.4 T. The concentration of glycine was determined using LCModel analysis at 1.1 +/- 0.1 mM, in good agreement with biochemical measurements previously reported. We conclude that at high magnetic fields, glycine can be measured at a relatively short echo time (TE) without additional editing efforts.
Keywords
Animals, Brain/metabolism, Glycine/metabolism, Magnetic Resonance Spectroscopy/methods, Male, Rats, Rats, Sprague-Dawley
Pubmed
Web of science
Create date
04/08/2010 16:28
Last modification date
20/08/2019 14:22