Movement Disorders (revue)

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NEUROCHEMICAL ALTERATIONS IN SPINOCEREBELLAR ATAXIA TYPE 1 AND THEIR CORRELATIONS WITH CLINICAL STATUS

Identifieur interne : 000326 ( Pmc/Checkpoint ); précédent : 000325; suivant : 000327

NEUROCHEMICAL ALTERATIONS IN SPINOCEREBELLAR ATAXIA TYPE 1 AND THEIR CORRELATIONS WITH CLINICAL STATUS

Auteurs : Gülin Öz [États-Unis] ; Diane Hutter [États-Unis] ; Ivan Tká [États-Unis] ; H. Brent Clark [États-Unis] ; Myron D. Gross [États-Unis] ; Hong Jiang [États-Unis] ; Lynn E. Eberly [États-Unis] ; Khalaf O. Bushara [États-Unis] ; Christopher M. Gomez [États-Unis]

Source :

RBID : PMC:2916651

Abstract

Robust biomarkers of neurodegeneration are critical for testing of neuroprotective therapies. The clinical applicability of such biomarkers requires sufficient sensitivity to detect disease in individuals. Here we tested the sensitivity of high field (4 tesla) proton magnetic resonance spectroscopy (1H MRS) to neurochemical alterations in the cerebellum and brainstem in spinocerebellar ataxia type 1 (SCA1). We measured neurochemical profiles that consisted of 10–15 metabolite concentrations in the vermis, cerebellar hemispheres and pons of patients with SCA1 (N=9) and healthy controls (N=15). Total NAA (N-acetylaspartate + N-acetylaspartylglutamate, tNAA) and glutamate were lower and glutamine, myo-inositol and total creatine (creatine + phosphocreatine, tCr) were higher in patients relative to controls, consistent with neuronal dysfunction/loss, gliotic activity and alterations in glutamate-glutamine cycling and energy metabolism. Changes in tNAA, tCr, myo-inositol and glutamate levels were discernible in individual spectra and the tNAA/myo-inositol ratio in the cerebellar hemipheres and pons differentiated the patients from controls with 100% specificity and sensitivity. In addition, tNAA, myo-inositol and glutamate levels in the cerebellar hemispheres and the tNAA and myo-inositol levels in the pons correlated with ataxia scores (Scale for the Assessment and Rating of Ataxia, SARA). Two other biomarkers measured in the cerebrospinal fluid (CSF) of a subset of the volunteers (F2-isoprostanes as a marker of oxidative stress and glial fibrillary acidic protein (GFAP) as a marker of gliosis) were not different between patients and controls. These data demonstrate that 1H MRS biomarkers can be utilized to non-invasively assess neuronal and glial status in individual ataxia patients.


Url:
DOI: 10.1002/mds.23067
PubMed: 20310029
PubMed Central: 2916651


Affiliations:


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<p id="P2">Robust biomarkers of neurodegeneration are critical for testing of neuroprotective therapies. The clinical applicability of such biomarkers requires sufficient sensitivity to detect disease in individuals. Here we tested the sensitivity of high field (4 tesla) proton magnetic resonance spectroscopy (
<sup>1</sup>
H MRS) to neurochemical alterations in the cerebellum and brainstem in spinocerebellar ataxia type 1 (SCA1). We measured neurochemical profiles that consisted of 10–15 metabolite concentrations in the vermis, cerebellar hemispheres and pons of patients with SCA1 (N=9) and healthy controls (N=15). Total NAA (N-acetylaspartate + N-acetylaspartylglutamate, tNAA) and glutamate were lower and glutamine,
<italic>myo</italic>
-inositol and total creatine (creatine + phosphocreatine, tCr) were higher in patients relative to controls, consistent with neuronal dysfunction/loss, gliotic activity and alterations in glutamate-glutamine cycling and energy metabolism. Changes in tNAA, tCr,
<italic>myo</italic>
-inositol and glutamate levels were discernible in individual spectra and the tNAA/
<italic>myo</italic>
-inositol ratio in the cerebellar hemipheres and pons differentiated the patients from controls with 100% specificity and sensitivity. In addition, tNAA,
<italic>myo</italic>
-inositol and glutamate levels in the cerebellar hemispheres and the tNAA and
<italic>myo</italic>
-inositol levels in the pons correlated with ataxia scores (Scale for the Assessment and Rating of Ataxia, SARA). Two other biomarkers measured in the cerebrospinal fluid (CSF) of a subset of the volunteers (F
<sub>2</sub>
-isoprostanes as a marker of oxidative stress and glial fibrillary acidic protein (GFAP) as a marker of gliosis) were not different between patients and controls. These data demonstrate that
<sup>1</sup>
H MRS biomarkers can be utilized to non-invasively assess neuronal and glial status in individual ataxia patients.</p>
</div>
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<contrib contrib-type="author">
<name>
<surname>Öz</surname>
<given-names>Gülin</given-names>
</name>
<degrees>PhD</degrees>
<xref ref-type="aff" rid="A1">1</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Hutter</surname>
<given-names>Diane</given-names>
</name>
<degrees>RN</degrees>
<xref ref-type="aff" rid="A1">1</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Tkáč</surname>
<given-names>Ivan</given-names>
</name>
<degrees>PhD</degrees>
<xref ref-type="aff" rid="A1">1</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Clark</surname>
<given-names>H. Brent</given-names>
</name>
<degrees>MD, PhD</degrees>
<xref ref-type="aff" rid="A2">2</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Gross</surname>
<given-names>Myron D.</given-names>
</name>
<degrees>PhD</degrees>
<xref ref-type="aff" rid="A2">2</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Jiang</surname>
<given-names>Hong</given-names>
</name>
<degrees>MD</degrees>
<xref ref-type="aff" rid="A3">3</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Eberly</surname>
<given-names>Lynn E.</given-names>
</name>
<degrees>PhD</degrees>
<xref ref-type="aff" rid="A4">4</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Bushara</surname>
<given-names>Khalaf O.</given-names>
</name>
<degrees>MD</degrees>
<xref ref-type="aff" rid="A5">5</xref>
</contrib>
<contrib contrib-type="author">
<name>
<surname>Gomez</surname>
<given-names>Christopher M.</given-names>
</name>
<degrees>MD, PhD</degrees>
<xref ref-type="aff" rid="A6">6</xref>
</contrib>
</contrib-group>
<aff id="A1">
<label>1</label>
Center for MR Research, Department of Radiology, Medical School, University of Minnesota, Minneapolis, MN, USA</aff>
<aff id="A2">
<label>2</label>
Department of Laboratory Medicine and Pathology, Medical School, University of Minnesota, Minneapolis, MN, USA</aff>
<aff id="A3">
<label>3</label>
Visiting scientist, Department of Neurology, University of Chicago, Chicago, IL, USA</aff>
<aff id="A4">
<label>4</label>
Division of Biostatistics, School of Public Health, University of Minnesota, Minneapolis, MN, USA</aff>
<aff id="A5">
<label>5</label>
Department of Neurology, Medical School, University of Minnesota, Minneapolis, MN, USA</aff>
<aff id="A6">
<label>6</label>
Department of Neurology, University of Chicago, Chicago, IL, USA</aff>
<author-notes>
<corresp id="cor1">Correspondence to: Gülin Öz, Center for MR Research, 2021 6
<sup>th</sup>
St. S.E., Minneapolis, MN 55455, Tel: +1 612 625-7897, Fax: +1 612 626-2004,
<email>gulin@cmrr.umn.edu</email>
</corresp>
<fn id="FN1" fn-type="present-address">
<p id="P1">Present address for Hong Jiang: Department of Neurology, Xiangya Hospital Neurodegenerative Disorders Research Center, Central South University, Changsha, Hunan, P.R.China</p>
</fn>
</author-notes>
<pub-date pub-type="nihms-submitted">
<day>30</day>
<month>6</month>
<year>2010</year>
</pub-date>
<pub-date pub-type="ppub">
<day>15</day>
<month>7</month>
<year>2010</year>
</pub-date>
<pub-date pub-type="pmc-release">
<day>15</day>
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<year>2011</year>
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<issue>9</issue>
<fpage>1253</fpage>
<lpage>1261</lpage>
<abstract>
<p id="P2">Robust biomarkers of neurodegeneration are critical for testing of neuroprotective therapies. The clinical applicability of such biomarkers requires sufficient sensitivity to detect disease in individuals. Here we tested the sensitivity of high field (4 tesla) proton magnetic resonance spectroscopy (
<sup>1</sup>
H MRS) to neurochemical alterations in the cerebellum and brainstem in spinocerebellar ataxia type 1 (SCA1). We measured neurochemical profiles that consisted of 10–15 metabolite concentrations in the vermis, cerebellar hemispheres and pons of patients with SCA1 (N=9) and healthy controls (N=15). Total NAA (N-acetylaspartate + N-acetylaspartylglutamate, tNAA) and glutamate were lower and glutamine,
<italic>myo</italic>
-inositol and total creatine (creatine + phosphocreatine, tCr) were higher in patients relative to controls, consistent with neuronal dysfunction/loss, gliotic activity and alterations in glutamate-glutamine cycling and energy metabolism. Changes in tNAA, tCr,
<italic>myo</italic>
-inositol and glutamate levels were discernible in individual spectra and the tNAA/
<italic>myo</italic>
-inositol ratio in the cerebellar hemipheres and pons differentiated the patients from controls with 100% specificity and sensitivity. In addition, tNAA,
<italic>myo</italic>
-inositol and glutamate levels in the cerebellar hemispheres and the tNAA and
<italic>myo</italic>
-inositol levels in the pons correlated with ataxia scores (Scale for the Assessment and Rating of Ataxia, SARA). Two other biomarkers measured in the cerebrospinal fluid (CSF) of a subset of the volunteers (F
<sub>2</sub>
-isoprostanes as a marker of oxidative stress and glial fibrillary acidic protein (GFAP) as a marker of gliosis) were not different between patients and controls. These data demonstrate that
<sup>1</sup>
H MRS biomarkers can be utilized to non-invasively assess neuronal and glial status in individual ataxia patients.</p>
</abstract>
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<kwd>MRS</kwd>
<kwd>ataxia</kwd>
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<kwd>neurochemical profile</kwd>
</kwd-group>
<contract-num rid="NS1">P30 NS057091-04 ||NS</contract-num>
<contract-sponsor id="NS1">National Institute of Neurological Disorders and Stroke : NINDS</contract-sponsor>
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<name sortKey="Eberly, Lynn E" sort="Eberly, Lynn E" uniqKey="Eberly L" first="Lynn E." last="Eberly">Lynn E. Eberly</name>
<name sortKey="Gomez, Christopher M" sort="Gomez, Christopher M" uniqKey="Gomez C" first="Christopher M." last="Gomez">Christopher M. Gomez</name>
<name sortKey="Gross, Myron D" sort="Gross, Myron D" uniqKey="Gross M" first="Myron D." last="Gross">Myron D. Gross</name>
<name sortKey="Hutter, Diane" sort="Hutter, Diane" uniqKey="Hutter D" first="Diane" last="Hutter">Diane Hutter</name>
<name sortKey="Jiang, Hong" sort="Jiang, Hong" uniqKey="Jiang H" first="Hong" last="Jiang">Hong Jiang</name>
<name sortKey="Tka, Ivan" sort="Tka, Ivan" uniqKey="Tka I" first="Ivan" last="Tká">Ivan Tká</name>
</country>
</tree>
</affiliations>
</record>

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