Reduced α-synuclein levels in cerebrospinal fluid in Parkinson's disease are unrelated to clinical and imaging measures of disease severity
Background and purpose The cerebrospinal fluid (CSF) concentration of α‐synuclein may reflect the aggregation of α‐synuclein in brain tissue that neuropathologically characterizes Parkinson's disease (PD). Although most studies in large cohorts report reduced CSF α‐synuclein levels in PD, the a...
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| Veröffentlicht in: | European journal of neurology 2014-03, Vol.21 (3), p.388-394 |
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| container_title | European journal of neurology |
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| creator | van Dijk, K. D. Bidinosti, M. Weiss, A. Raijmakers, P. Berendse, H. W. van de Berg, W. D. J. |
| description | Background and purpose
The cerebrospinal fluid (CSF) concentration of α‐synuclein may reflect the aggregation of α‐synuclein in brain tissue that neuropathologically characterizes Parkinson's disease (PD). Although most studies in large cohorts report reduced CSF α‐synuclein levels in PD, the available data to date are not consistent due to variation in group sizes, pre‐analytical confounding factors and assay characteristics. Furthermore, it remains unclear whether CSF α‐synuclein concentrations correlate with measures of disease severity. Acknowledging the methodological issues that emerged from previous studies, we evaluated whether CSF α‐synuclein levels differ between patients with PD and controls, and relate to disease duration or severity.
Methods
α‐Synuclein levels were measured in CSF samples of 53 well‐characterized patients with PD and 50 healthy controls employing a recently developed time‐resolved Förster's resonance energy transfer assay. In addition, we studied the relationship of CSF α‐synuclein levels with disease duration, clinical measures of disease severity and the striatal dopaminergic deficit as measured by dopamine transporter binding and single photon emission computed tomography.
Results
In patients with PD, we observed a decrease in mean CSF α‐synuclein levels that was unrelated to disease duration or measures of disease severity. Using total protein normalized α‐synuclein, a sensitivity and specificity of 70% and 74% could be reached for distinguishing between patients with PD and controls.
Conclusion
CSF α‐synuclein levels are reduced in patients with PD compared with healthy controls. However, sensitivity and specificity indicate that α‐synuclein will not suffice as a single biomarker. CSF α‐synuclein levels do not correlate with measures of disease severity, including striatal dopaminergic deficit.
Click here to view the accompanying paper in this issue. |
| doi_str_mv | 10.1111/ene.12176 |
| format | Article |
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The cerebrospinal fluid (CSF) concentration of α‐synuclein may reflect the aggregation of α‐synuclein in brain tissue that neuropathologically characterizes Parkinson's disease (PD). Although most studies in large cohorts report reduced CSF α‐synuclein levels in PD, the available data to date are not consistent due to variation in group sizes, pre‐analytical confounding factors and assay characteristics. Furthermore, it remains unclear whether CSF α‐synuclein concentrations correlate with measures of disease severity. Acknowledging the methodological issues that emerged from previous studies, we evaluated whether CSF α‐synuclein levels differ between patients with PD and controls, and relate to disease duration or severity.
Methods
α‐Synuclein levels were measured in CSF samples of 53 well‐characterized patients with PD and 50 healthy controls employing a recently developed time‐resolved Förster's resonance energy transfer assay. In addition, we studied the relationship of CSF α‐synuclein levels with disease duration, clinical measures of disease severity and the striatal dopaminergic deficit as measured by dopamine transporter binding and single photon emission computed tomography.
Results
In patients with PD, we observed a decrease in mean CSF α‐synuclein levels that was unrelated to disease duration or measures of disease severity. Using total protein normalized α‐synuclein, a sensitivity and specificity of 70% and 74% could be reached for distinguishing between patients with PD and controls.
Conclusion
CSF α‐synuclein levels are reduced in patients with PD compared with healthy controls. However, sensitivity and specificity indicate that α‐synuclein will not suffice as a single biomarker. CSF α‐synuclein levels do not correlate with measures of disease severity, including striatal dopaminergic deficit.
Click here to view the accompanying paper in this issue.</description><identifier>ISSN: 1351-5101</identifier><identifier>EISSN: 1468-1331</identifier><identifier>DOI: 10.1111/ene.12176</identifier><identifier>PMID: 23631635</identifier><language>eng</language><publisher>England: Blackwell Publishing Ltd</publisher><subject>Adult ; Aged ; Aged, 80 and over ; alpha-Synuclein - cerebrospinal fluid ; biomarker ; Case-Control Studies ; cerebrospinal fluid ; Corpus Striatum - diagnostic imaging ; DAT-SPECT ; Dopamine Plasma Membrane Transport Proteins - metabolism ; Female ; Fluorescence Resonance Energy Transfer ; Humans ; Male ; Mental Status Schedule ; Middle Aged ; Parkinson Disease - cerebrospinal fluid ; Parkinson Disease - diagnostic imaging ; Parkinson's disease ; Retrospective Studies ; ROC Curve ; Statistics, Nonparametric ; Tomography, Emission-Computed, Single-Photon ; α-synuclein</subject><ispartof>European journal of neurology, 2014-03, Vol.21 (3), p.388-394</ispartof><rights>2013 The Author(s) European Journal of Neurology © 2013 EFNS</rights><rights>2013 The Author(s) European Journal of Neurology © 2013 EFNS.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1111%2Fene.12176$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1111%2Fene.12176$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,776,780,1411,27901,27902,45550,45551</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/23631635$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>van Dijk, K. D.</creatorcontrib><creatorcontrib>Bidinosti, M.</creatorcontrib><creatorcontrib>Weiss, A.</creatorcontrib><creatorcontrib>Raijmakers, P.</creatorcontrib><creatorcontrib>Berendse, H. W.</creatorcontrib><creatorcontrib>van de Berg, W. D. J.</creatorcontrib><title>Reduced α-synuclein levels in cerebrospinal fluid in Parkinson's disease are unrelated to clinical and imaging measures of disease severity</title><title>European journal of neurology</title><addtitle>Eur J Neurol</addtitle><description>Background and purpose
The cerebrospinal fluid (CSF) concentration of α‐synuclein may reflect the aggregation of α‐synuclein in brain tissue that neuropathologically characterizes Parkinson's disease (PD). Although most studies in large cohorts report reduced CSF α‐synuclein levels in PD, the available data to date are not consistent due to variation in group sizes, pre‐analytical confounding factors and assay characteristics. Furthermore, it remains unclear whether CSF α‐synuclein concentrations correlate with measures of disease severity. Acknowledging the methodological issues that emerged from previous studies, we evaluated whether CSF α‐synuclein levels differ between patients with PD and controls, and relate to disease duration or severity.
Methods
α‐Synuclein levels were measured in CSF samples of 53 well‐characterized patients with PD and 50 healthy controls employing a recently developed time‐resolved Förster's resonance energy transfer assay. In addition, we studied the relationship of CSF α‐synuclein levels with disease duration, clinical measures of disease severity and the striatal dopaminergic deficit as measured by dopamine transporter binding and single photon emission computed tomography.
Results
In patients with PD, we observed a decrease in mean CSF α‐synuclein levels that was unrelated to disease duration or measures of disease severity. Using total protein normalized α‐synuclein, a sensitivity and specificity of 70% and 74% could be reached for distinguishing between patients with PD and controls.
Conclusion
CSF α‐synuclein levels are reduced in patients with PD compared with healthy controls. However, sensitivity and specificity indicate that α‐synuclein will not suffice as a single biomarker. CSF α‐synuclein levels do not correlate with measures of disease severity, including striatal dopaminergic deficit.
Click here to view the accompanying paper in this issue.</description><subject>Adult</subject><subject>Aged</subject><subject>Aged, 80 and over</subject><subject>alpha-Synuclein - cerebrospinal fluid</subject><subject>biomarker</subject><subject>Case-Control Studies</subject><subject>cerebrospinal fluid</subject><subject>Corpus Striatum - diagnostic imaging</subject><subject>DAT-SPECT</subject><subject>Dopamine Plasma Membrane Transport Proteins - metabolism</subject><subject>Female</subject><subject>Fluorescence Resonance Energy Transfer</subject><subject>Humans</subject><subject>Male</subject><subject>Mental Status Schedule</subject><subject>Middle Aged</subject><subject>Parkinson Disease - cerebrospinal fluid</subject><subject>Parkinson Disease - diagnostic imaging</subject><subject>Parkinson's disease</subject><subject>Retrospective Studies</subject><subject>ROC Curve</subject><subject>Statistics, Nonparametric</subject><subject>Tomography, Emission-Computed, Single-Photon</subject><subject>α-synuclein</subject><issn>1351-5101</issn><issn>1468-1331</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNo9kc9u1DAQxi0Eov848ALIN7ik9cSxkxyramkR1YKqRRwtx5lUpl5nsRPovkNfhhfhmZh2y_oyo_H3G8vfx9hbEKdA5wwjnkIJtX7BDqHSTQFSwkvqpYJCgYADdpTzDyFEWZfiNTsopZagpTpkDzfYzw57_vdPkbdxdgF95AF_YcicOocJuzTmjY828CHMvn8cf7Xpzsc8xveZ9z6jzchtQj7HhMFOtG8auQs-ekeYjQSt7a2Pt3xN2jlh5uOwJzM9l_y0PWGvBhsyvnmux-zbx8Xq4qq4_nL56eL8uvBl0-pCD7Z0bVdb0fRDq6zrVNl1Aw4VKpQWLaimLlFLmldUGiVapfuq0tBX1oE8Zh92ezdp_DljnszaZ4ch2IjjnA1UbUs-St2S9N2zdO7W2JtNoo-krfnvIAnOdoLfPuB2fw_CPEZjKBrzFI1ZLBdPDRHFjvB5wvs9QY4aXctame_LS6NXsFytPjemlf8A6taTEw</recordid><startdate>201403</startdate><enddate>201403</enddate><creator>van Dijk, K. D.</creator><creator>Bidinosti, M.</creator><creator>Weiss, A.</creator><creator>Raijmakers, P.</creator><creator>Berendse, H. W.</creator><creator>van de Berg, W. D. J.</creator><general>Blackwell Publishing Ltd</general><scope>BSCLL</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>7X8</scope></search><sort><creationdate>201403</creationdate><title>Reduced α-synuclein levels in cerebrospinal fluid in Parkinson's disease are unrelated to clinical and imaging measures of disease severity</title><author>van Dijk, K. D. ; Bidinosti, M. ; Weiss, A. ; Raijmakers, P. ; Berendse, H. W. ; van de Berg, W. D. J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-i2896-6fa2c9b7a08df95acb52bbfef4e5e3aea15872e63b524e63850956d4461d4ac13</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Adult</topic><topic>Aged</topic><topic>Aged, 80 and over</topic><topic>alpha-Synuclein - cerebrospinal fluid</topic><topic>biomarker</topic><topic>Case-Control Studies</topic><topic>cerebrospinal fluid</topic><topic>Corpus Striatum - diagnostic imaging</topic><topic>DAT-SPECT</topic><topic>Dopamine Plasma Membrane Transport Proteins - metabolism</topic><topic>Female</topic><topic>Fluorescence Resonance Energy Transfer</topic><topic>Humans</topic><topic>Male</topic><topic>Mental Status Schedule</topic><topic>Middle Aged</topic><topic>Parkinson Disease - cerebrospinal fluid</topic><topic>Parkinson Disease - diagnostic imaging</topic><topic>Parkinson's disease</topic><topic>Retrospective Studies</topic><topic>ROC Curve</topic><topic>Statistics, Nonparametric</topic><topic>Tomography, Emission-Computed, Single-Photon</topic><topic>α-synuclein</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>van Dijk, K. D.</creatorcontrib><creatorcontrib>Bidinosti, M.</creatorcontrib><creatorcontrib>Weiss, A.</creatorcontrib><creatorcontrib>Raijmakers, P.</creatorcontrib><creatorcontrib>Berendse, H. W.</creatorcontrib><creatorcontrib>van de Berg, W. D. J.</creatorcontrib><collection>Istex</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>MEDLINE - Academic</collection><jtitle>European journal of neurology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>van Dijk, K. D.</au><au>Bidinosti, M.</au><au>Weiss, A.</au><au>Raijmakers, P.</au><au>Berendse, H. W.</au><au>van de Berg, W. D. J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Reduced α-synuclein levels in cerebrospinal fluid in Parkinson's disease are unrelated to clinical and imaging measures of disease severity</atitle><jtitle>European journal of neurology</jtitle><addtitle>Eur J Neurol</addtitle><date>2014-03</date><risdate>2014</risdate><volume>21</volume><issue>3</issue><spage>388</spage><epage>394</epage><pages>388-394</pages><issn>1351-5101</issn><eissn>1468-1331</eissn><abstract>Background and purpose
The cerebrospinal fluid (CSF) concentration of α‐synuclein may reflect the aggregation of α‐synuclein in brain tissue that neuropathologically characterizes Parkinson's disease (PD). Although most studies in large cohorts report reduced CSF α‐synuclein levels in PD, the available data to date are not consistent due to variation in group sizes, pre‐analytical confounding factors and assay characteristics. Furthermore, it remains unclear whether CSF α‐synuclein concentrations correlate with measures of disease severity. Acknowledging the methodological issues that emerged from previous studies, we evaluated whether CSF α‐synuclein levels differ between patients with PD and controls, and relate to disease duration or severity.
Methods
α‐Synuclein levels were measured in CSF samples of 53 well‐characterized patients with PD and 50 healthy controls employing a recently developed time‐resolved Förster's resonance energy transfer assay. In addition, we studied the relationship of CSF α‐synuclein levels with disease duration, clinical measures of disease severity and the striatal dopaminergic deficit as measured by dopamine transporter binding and single photon emission computed tomography.
Results
In patients with PD, we observed a decrease in mean CSF α‐synuclein levels that was unrelated to disease duration or measures of disease severity. Using total protein normalized α‐synuclein, a sensitivity and specificity of 70% and 74% could be reached for distinguishing between patients with PD and controls.
Conclusion
CSF α‐synuclein levels are reduced in patients with PD compared with healthy controls. However, sensitivity and specificity indicate that α‐synuclein will not suffice as a single biomarker. CSF α‐synuclein levels do not correlate with measures of disease severity, including striatal dopaminergic deficit.
Click here to view the accompanying paper in this issue.</abstract><cop>England</cop><pub>Blackwell Publishing Ltd</pub><pmid>23631635</pmid><doi>10.1111/ene.12176</doi><tpages>7</tpages></addata></record> |
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| ispartof | European journal of neurology, 2014-03, Vol.21 (3), p.388-394 |
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| source | MEDLINE; Wiley Online Library Journals Frontfile Complete |
| subjects | Adult Aged Aged, 80 and over alpha-Synuclein - cerebrospinal fluid biomarker Case-Control Studies cerebrospinal fluid Corpus Striatum - diagnostic imaging DAT-SPECT Dopamine Plasma Membrane Transport Proteins - metabolism Female Fluorescence Resonance Energy Transfer Humans Male Mental Status Schedule Middle Aged Parkinson Disease - cerebrospinal fluid Parkinson Disease - diagnostic imaging Parkinson's disease Retrospective Studies ROC Curve Statistics, Nonparametric Tomography, Emission-Computed, Single-Photon α-synuclein |
| title | Reduced α-synuclein levels in cerebrospinal fluid in Parkinson's disease are unrelated to clinical and imaging measures of disease severity |
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