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Expression Levels of an Alpha-Synuclein Transcript in Blood May Distinguish between Early Dementia with Lewy Bodies and Parkinson’s Disease

Lewy body diseases (LBD) including dementia with Lewy bodies (DLB) and Parkinson disease (PD) are characterized by alpha-synuclein pathology. DLB is difficult to diagnose and peripheral biomarkers are urgently needed. Therefore, we analyzed the expression of five alpha-synuclein gene (SNCA) transcri...

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Autores principales: Marsal-García, Laura, Urbizu, Aintzane, Arnaldo, Laura, Campdelacreu, Jaume, Vilas, Dolores, Ispierto, Lourdes, Gascón-Bayarri, Jordi, Reñé, Ramón, Álvarez, Ramiro, Beyer, Katrin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7828374/
https://www.ncbi.nlm.nih.gov/pubmed/33450872
http://dx.doi.org/10.3390/ijms22020725
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author Marsal-García, Laura
Urbizu, Aintzane
Arnaldo, Laura
Campdelacreu, Jaume
Vilas, Dolores
Ispierto, Lourdes
Gascón-Bayarri, Jordi
Reñé, Ramón
Álvarez, Ramiro
Beyer, Katrin
author_facet Marsal-García, Laura
Urbizu, Aintzane
Arnaldo, Laura
Campdelacreu, Jaume
Vilas, Dolores
Ispierto, Lourdes
Gascón-Bayarri, Jordi
Reñé, Ramón
Álvarez, Ramiro
Beyer, Katrin
author_sort Marsal-García, Laura
collection PubMed
description Lewy body diseases (LBD) including dementia with Lewy bodies (DLB) and Parkinson disease (PD) are characterized by alpha-synuclein pathology. DLB is difficult to diagnose and peripheral biomarkers are urgently needed. Therefore, we analyzed the expression of five alpha-synuclein gene (SNCA) transcripts, SNCAtv1, SNCAtv2, SNCAtv3, SNCA126, and SNCA112, in 45 LBD and control temporal cortex samples and in the blood of 72 DLB, 59 PD, and 54 control subjects. The results revealed overexpression of SNCAtv1 and SNCA112 in DLB, and SNCAtv2 in PD temporal cortices. In DLB blood, diminution of all SNCA transcripts was observed. SNCAtv1 and SNCAtv2 were diminished in PD with disease onset before 70 years. SNCAtv3, driven by its own promoter, showed opposite expression in early DLB and PD, suggesting that its amount may be an early, DLB specific biomarker. Correlation between blood transcript levels and disease duration was positive in DLB and negative in PD, possibly reflecting differences in brain alpha-synuclein aggregation rates associated with differences in disease courses. In conclusion, SNCA transcripts showed a disease-specific increase in the brain and were diminished in blood of LBD patients. SNCAtv3 expression was decreased in early DLB and increased in early PD and could be a biomarker for early DLB diagnosis.
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spelling pubmed-78283742021-01-25 Expression Levels of an Alpha-Synuclein Transcript in Blood May Distinguish between Early Dementia with Lewy Bodies and Parkinson’s Disease Marsal-García, Laura Urbizu, Aintzane Arnaldo, Laura Campdelacreu, Jaume Vilas, Dolores Ispierto, Lourdes Gascón-Bayarri, Jordi Reñé, Ramón Álvarez, Ramiro Beyer, Katrin Int J Mol Sci Article Lewy body diseases (LBD) including dementia with Lewy bodies (DLB) and Parkinson disease (PD) are characterized by alpha-synuclein pathology. DLB is difficult to diagnose and peripheral biomarkers are urgently needed. Therefore, we analyzed the expression of five alpha-synuclein gene (SNCA) transcripts, SNCAtv1, SNCAtv2, SNCAtv3, SNCA126, and SNCA112, in 45 LBD and control temporal cortex samples and in the blood of 72 DLB, 59 PD, and 54 control subjects. The results revealed overexpression of SNCAtv1 and SNCA112 in DLB, and SNCAtv2 in PD temporal cortices. In DLB blood, diminution of all SNCA transcripts was observed. SNCAtv1 and SNCAtv2 were diminished in PD with disease onset before 70 years. SNCAtv3, driven by its own promoter, showed opposite expression in early DLB and PD, suggesting that its amount may be an early, DLB specific biomarker. Correlation between blood transcript levels and disease duration was positive in DLB and negative in PD, possibly reflecting differences in brain alpha-synuclein aggregation rates associated with differences in disease courses. In conclusion, SNCA transcripts showed a disease-specific increase in the brain and were diminished in blood of LBD patients. SNCAtv3 expression was decreased in early DLB and increased in early PD and could be a biomarker for early DLB diagnosis. MDPI 2021-01-13 /pmc/articles/PMC7828374/ /pubmed/33450872 http://dx.doi.org/10.3390/ijms22020725 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Marsal-García, Laura
Urbizu, Aintzane
Arnaldo, Laura
Campdelacreu, Jaume
Vilas, Dolores
Ispierto, Lourdes
Gascón-Bayarri, Jordi
Reñé, Ramón
Álvarez, Ramiro
Beyer, Katrin
Expression Levels of an Alpha-Synuclein Transcript in Blood May Distinguish between Early Dementia with Lewy Bodies and Parkinson’s Disease
title Expression Levels of an Alpha-Synuclein Transcript in Blood May Distinguish between Early Dementia with Lewy Bodies and Parkinson’s Disease
title_full Expression Levels of an Alpha-Synuclein Transcript in Blood May Distinguish between Early Dementia with Lewy Bodies and Parkinson’s Disease
title_fullStr Expression Levels of an Alpha-Synuclein Transcript in Blood May Distinguish between Early Dementia with Lewy Bodies and Parkinson’s Disease
title_full_unstemmed Expression Levels of an Alpha-Synuclein Transcript in Blood May Distinguish between Early Dementia with Lewy Bodies and Parkinson’s Disease
title_short Expression Levels of an Alpha-Synuclein Transcript in Blood May Distinguish between Early Dementia with Lewy Bodies and Parkinson’s Disease
title_sort expression levels of an alpha-synuclein transcript in blood may distinguish between early dementia with lewy bodies and parkinson’s disease
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7828374/
https://www.ncbi.nlm.nih.gov/pubmed/33450872
http://dx.doi.org/10.3390/ijms22020725
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