2D MR Spectroscopy Combined with Prior-Knowledge Fitting Is Sensitive to HCV-Associated Cerebral Metabolic AbnormalitiesReport as inadecuate




2D MR Spectroscopy Combined with Prior-Knowledge Fitting Is Sensitive to HCV-Associated Cerebral Metabolic Abnormalities - Download this document for free, or read online. Document in PDF available to download.

International Journal of HepatologyVolume 2012 2012, Article ID 179365, 6 pages

Research Article

Department of Radiological Sciences, David Geffen School of Medicine, University of California, Los Angeles, CA 90095-1721, USA

Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles, CA 90095, USA

Greater Los Angeles VA Healthcare System, University of California, Los Angeles, CA 90073, USA

Received 25 February 2012; Revised 5 May 2012; Accepted 19 May 2012

Academic Editor: Mario Reis Alvares-da-Silva

Copyright © 2012 Rajakumar Nagarajan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

There is an evidence of neurocognitive dysfunction even in the absence of advanced liver disease in chronic hepatitis C virus HCV infection. Brain metabolism has been investigated non-invasively using one-dimensional 1D in vivo Magnetic Resonance Spectroscopy MRS over three decades. Even though highly concentrated cerebral metabolites N-acetylaspartate, creatine, choline, glutamate-glutamine, myo-inositol have been detected using MRS, other metabolites at low concentrations ~1–3 mM or less including glutathione, aspartate and GABA are quite difficult to observe using 1D MRS. In order to resolve overlapping resonances from a number of metabolites, a remedy is to add a second spectral dimension to the existing 1D MRS. Localized two-dimensional correlated spectroscopy L-COSY has been developed over the last decade to enhance the spectral dispersion by using the second spectral dimension. We have evaluated this L-COSY technique in the frontal white-gray matter regions of 14 HCV+ mean age of 56.2 years and 14 HCV− mean age of 46.6 years subjects. Our preliminary results showed significantly increased myo-inositol and glutathione in the HCV+ compared to the HCV− subjects. Hence, glutathione and myo-inositol should be considered along with other metabolites as important markers of inflammation.





Author: Rajakumar Nagarajan, Manoj K. Sarma, April D. Thames, Steven A. Castellon, Charles H. Hinkin, and M. Albert Thomas

Source: https://www.hindawi.com/



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