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research article

Neurochemical profile of the mouse hypothalamus using in vivo1H MRS at 14.1T

Lei, Hongxia  
•
Poitry-Yamate, Carole  
•
Preitner, Frédéric
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2010
Nmr in Biomedicine

The hypothalamus plays an essential role in the central nervous system of mammals by among others regulating glucose homeostasis, food intake, temperature, and to some extent blood pressure. Assessments of hypothalamic metabolism using, e.g. 1H MRS in mouse models can provide important insights into its function. To date, direct invivo1H MRS measurements of hypothalamus have not been reported. Here, we report that invivo single voxel measurements of mouse hypothalamus are feasible using 1H MRS at 14.1T. Localized 1H MR spectra from hypothalamus were obtained unilaterally (2–2.2 µL, VOI) and bilaterally (4–4.4 µL) with a quality comparable to that of hippocampus (3–3.5 µL). Using LCModel, a neurochemical profile consisting of 21 metabolites was quantified for both hypothalamus and hippocampus with most of the Cramér-Rao lower bounds within 20%. Relative to the hippocampus, the hypothalamus was characterized by high γ-aminobutryric acid and myo-inositol, and low taurine concentrations. When studying transgenic mice with no glucose transporter isoform 8 expressed, small metabolic changes were observed, yet glucose homeostasis was well maintained. We conclude that a specific neurochemical profile of mouse hypothalamus can be measured by 1H MRS which will allow identifying and following metabolic alterations longitudinally in the hypothalamus of genetic modified models.

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Type
research article
DOI
10.1002/nbm.1498
Web of Science ID

WOS:000280544000005

Author(s)
Lei, Hongxia  
•
Poitry-Yamate, Carole  
•
Preitner, Frédéric
•
Thorens, Bernard
•
Gruetter, Rolf  
Date Issued

2010

Publisher

Wiley-Blackwell

Published in
Nmr in Biomedicine
Volume

23

Issue

6

Start page

578

End page

583

Subjects

1H MRS

•

neurochemical profile

•

hypothalamus

•

high magnetic fields

•

mouse

•

glucose transporter

•

CIBM-AIT

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LIFMET  
CIBM  
Available on Infoscience
February 11, 2011
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/64250
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