Brain stem pathology in Parkinson's disease: An evaluation of the Braak staging model
Identifieur interne : 000898 ( Istex/Corpus ); précédent : 000897; suivant : 000899Brain stem pathology in Parkinson's disease: An evaluation of the Braak staging model
Auteurs : Ann E. Kingsbury ; Rina Bandopadhyay ; Laura Silveira-Moriyama ; Hilary Ayling ; Constantinos Kallis ; William Sterlacci ; Hans Maeir ; Werner Poewe ; Andrew J. LeesSource :
- Movement Disorders [ 0885-3185 ] ; 2010-11-15.
English descriptors
- KwdEn :
Abstract
The lower brain stem of 25 pathologically‐confirmed Parkinson's disease (PD) cases was examined by alpha synuclein immunohistochemistry to characterize pathological accumulation of alpha synuclein (Lewy‐type α‐synucleinopathy, LTS) in the medulla oblongata, to examine differences between affected regions and test a proposed model of staging of pathology in PD. All cases had LTS in the medulla, including the dorsal motor nucleus of the vagus (dmX), when present. The distribution followed a consistent pattern and appeared to be concentrated in a tyrosine hydroxylase (TH) immunoreactive region, probably representing the dorsal IX/X nuclear complex and the intermediate reticular zone. LTS density was greatest in the dmX. A similar distribution pattern to PD was seen in 14 incidental Lewy body disease (ILBD) cases, five derived from the Queen Square Brain Bank tissue collection and nine identified in separate series of 60 neurologically‐normal individuals, and in three cases with the G2019S mutation of LRRK2. Semiquantitative assessment showed that severity of pathology in the dmX was not correlated with the severity of cortical pathology. Semiquantitative assay of TH and ChAT peptide expression in the medulla showed that TH expression in PD and ILBD did not differ from controls. These findings broadly support the Braak hypothesis of caudo‐rostral development but indicate that the extent of the disease in the cortex and the severity of pathology in the medulla were independent of one another. © 2010 Movement Disorder Society
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DOI: 10.1002/mds.23305
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<front><div type="abstract" xml:lang="en">The lower brain stem of 25 pathologically‐confirmed Parkinson's disease (PD) cases was examined by alpha synuclein immunohistochemistry to characterize pathological accumulation of alpha synuclein (Lewy‐type α‐synucleinopathy, LTS) in the medulla oblongata, to examine differences between affected regions and test a proposed model of staging of pathology in PD. All cases had LTS in the medulla, including the dorsal motor nucleus of the vagus (dmX), when present. The distribution followed a consistent pattern and appeared to be concentrated in a tyrosine hydroxylase (TH) immunoreactive region, probably representing the dorsal IX/X nuclear complex and the intermediate reticular zone. LTS density was greatest in the dmX. A similar distribution pattern to PD was seen in 14 incidental Lewy body disease (ILBD) cases, five derived from the Queen Square Brain Bank tissue collection and nine identified in separate series of 60 neurologically‐normal individuals, and in three cases with the G2019S mutation of LRRK2. Semiquantitative assessment showed that severity of pathology in the dmX was not correlated with the severity of cortical pathology. Semiquantitative assay of TH and ChAT peptide expression in the medulla showed that TH expression in PD and ILBD did not differ from controls. These findings broadly support the Braak hypothesis of caudo‐rostral development but indicate that the extent of the disease in the cortex and the severity of pathology in the medulla were independent of one another. © 2010 Movement Disorder Society</div>
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<titleGroup><title type="main" xml:lang="en">Brain stem pathology in Parkinson's disease: An evaluation of the Braak staging model</title>
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<p>The lower brain stem of 25 pathologically‐confirmed Parkinson's disease (PD) cases was examined by alpha synuclein immunohistochemistry to characterize pathological accumulation of alpha synuclein (Lewy‐type α‐synucleinopathy, LTS) in the medulla oblongata, to examine differences between affected regions and test a proposed model of staging of pathology in PD. All cases had LTS in the medulla, including the dorsal motor nucleus of the vagus (dmX), when present. The distribution followed a consistent pattern and appeared to be concentrated in a tyrosine hydroxylase (TH) immunoreactive region, probably representing the dorsal IX/X nuclear complex and the intermediate reticular zone. LTS density was greatest in the dmX. A similar distribution pattern to PD was seen in 14 incidental Lewy body disease (ILBD) cases, five derived from the Queen Square Brain Bank tissue collection and nine identified in separate series of 60 neurologically‐normal individuals, and in three cases with the G2019S mutation of LRRK2. Semiquantitative assessment showed that severity of pathology in the dmX was not correlated with the severity of cortical pathology. Semiquantitative assay of TH and ChAT peptide expression in the medulla showed that TH expression in PD and ILBD did not differ from controls. These findings broadly support the Braak hypothesis of caudo‐rostral development but indicate that the extent of the disease in the cortex and the severity of pathology in the medulla were independent of one another. © 2010 Movement Disorder Society</p>
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<noteGroup><note xml:id="fn1" numbered="no"><p>Potential conflict of interest: Nothing to report.</p>
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<abstract lang="en">The lower brain stem of 25 pathologically‐confirmed Parkinson's disease (PD) cases was examined by alpha synuclein immunohistochemistry to characterize pathological accumulation of alpha synuclein (Lewy‐type α‐synucleinopathy, LTS) in the medulla oblongata, to examine differences between affected regions and test a proposed model of staging of pathology in PD. All cases had LTS in the medulla, including the dorsal motor nucleus of the vagus (dmX), when present. The distribution followed a consistent pattern and appeared to be concentrated in a tyrosine hydroxylase (TH) immunoreactive region, probably representing the dorsal IX/X nuclear complex and the intermediate reticular zone. LTS density was greatest in the dmX. A similar distribution pattern to PD was seen in 14 incidental Lewy body disease (ILBD) cases, five derived from the Queen Square Brain Bank tissue collection and nine identified in separate series of 60 neurologically‐normal individuals, and in three cases with the G2019S mutation of LRRK2. Semiquantitative assessment showed that severity of pathology in the dmX was not correlated with the severity of cortical pathology. Semiquantitative assay of TH and ChAT peptide expression in the medulla showed that TH expression in PD and ILBD did not differ from controls. These findings broadly support the Braak hypothesis of caudo‐rostral development but indicate that the extent of the disease in the cortex and the severity of pathology in the medulla were independent of one another. © 2010 Movement Disorder Society</abstract>
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