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Published in: BMC Medical Genetics 1/2018

Open Access 01-12-2018 | Research article

S100B polymorphisms are associated with age of onset of Parkinson’s disease

Authors: Camilla Fardell, Anna Zettergren, Caroline Ran, Andrea Carmine Belin, Agneta Ekman, Olof Sydow, Lars Bäckman, Björn Holmberg, Nil Dizdar, Peter Söderkvist, Hans Nissbrandt

Published in: BMC Medical Genetics | Issue 1/2018

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Abstract

Background

In this study we investigated the association between SNPs in the S100B gene and Parkinson’s disease (PD) in two independent Swedish cohorts. The SNP rs9722 has previously been shown to be associated with higher S100B concentrations in serum and frontal cortex in humans. S100B is widely expressed in the central nervous system and has many functions such as regulating calcium homeostasis, inflammatory processes, cytoskeleton assembly/disassembly, protein phosphorylation and degradation, and cell proliferation and differentiation. Several of these functions have been suggested to be of importance for the pathophysiology of PD.

Methods

The SNPs rs9722, rs2239574, rs881827, rs9984765, and rs1051169 of the S100B gene were genotyped using the KASPar® PCR SNP genotyping system in a case-control study of two populations (431 PD patients and 465 controls, 195 PD patients and 378 controls, respectively). The association between the genotype and allelic distributions and PD risk was evaluated using Chi-Square and Cox proportional hazards test, as well as logistic regression. Linear regression and Cox proportional hazards tests were applied to assess the effect of the rs9722 genotypes on age of disease onset.

Results

The S100B SNPs tested were not associated with the risk of PD. However, in both cohorts, the T allele of rs9722 was significantly more common in early onset PD patients compared to late onset PD patients. The SNP rs9722 was significantly related to age of onset, and each T allele lowered disease onset with 4.9 years. In addition, allelic variants of rs881827, rs9984765, and rs1051169, were significantly more common in early-onset PD compared to late-onset PD in the pooled population.

Conclusions

rs9722, a functional SNP in the 3’-UTR of the S100B gene, was strongly associated with age of onset of PD.
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Metadata
Title
S100B polymorphisms are associated with age of onset of Parkinson’s disease
Authors
Camilla Fardell
Anna Zettergren
Caroline Ran
Andrea Carmine Belin
Agneta Ekman
Olof Sydow
Lars Bäckman
Björn Holmberg
Nil Dizdar
Peter Söderkvist
Hans Nissbrandt
Publication date
01-12-2018
Publisher
BioMed Central
Published in
BMC Medical Genetics / Issue 1/2018
Electronic ISSN: 1471-2350
DOI
https://doi.org/10.1186/s12881-018-0547-3

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