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Alzheimer's Disease-Related Polymorphisms in Shunt-Responsive Idiopathic Normal Pressure Hydrocephalus

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Date
2017
Author(s)
Huovinen J
Helisalmi S
Paananen J
Laiterä T
Kojoukhova M
Sutela A
Vanninen R
Laitinen M
Rauramaa T
Koivisto AM
Remes AM
Soininen H
Kurki M
Haapasalo A
Jääskeläinen JE
Hiltunen M
Leinonen V
Unique identifier
10.3233/JAD-170583
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Citation
Huovinen J. Helisalmi S. Paananen J. Laiterä T. Kojoukhova M. Sutela A. Vanninen R. Laitinen M. Rauramaa T. Koivisto AM. Remes AM. Soininen H. Kurki M. Haapasalo A. Jääskeläinen JE. Hiltunen M. Leinonen V. (2017). Alzheimer's Disease-Related Polymorphisms in Shunt-Responsive Idiopathic Normal Pressure Hydrocephalus.  Journal of Alzheimer's Disease, 60 (3) , 1077-1085. 10.3233/JAD-170583.
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Abstract

Background:
Idiopathic normal pressure hydrocephalus (iNPH) is a late onset, surgically treated progressive brain disease caused by impaired cerebrospinal fluid dynamics and subsequent ventriculomegaly. Comorbid Alzheimer’s disease (AD) seems to be frequent in iNPH.

Objective:
We aim to evaluate the role of AD-related polymorphisms in iNPH.

Methods:
Overall 188 shunt-operated iNPH patients and 688 controls without diagnosed neurodegenerative disease were included into analysis. Twenty-three single-nucleotide polymorphisms (SNPs FRMD4A [rs7081208_A, rs2446581_A, rs17314229_T], CR1, BIN, CD2AP, CLU, MS4A6A, MS4A4E, PICALM, ABCA7, CD33, INPP5D, HLA_DRB5, EPHA1, PTK2B, CELF1, SORL1, FERMT2, SLC24A, DSG2, CASS4, and NME8) adjusted to APOE were analyzed between groups by using binary logistic regression analysis. Neuroradiological characteristics and AD-related changes in the right frontal cortical brain biopsies were available for further analysis.

Results:
Logistic regression analysis adjusted to age, gender, and other SNPs indicated allelic variation of NME8 between iNPH patients and non-demented controls (p = 0.014). The allelic variation of NME8 was not related to the neuropathological changes in the brain biopsies of iNPH patients. However, periventricular white matter changes (p = 0.017) were more frequent in the iNPH patients with the AA-genotype, an identified risk factor of AD.

Conclusions:
Our findings increase the evidence that iNPH is characterized by genetic and pathophysiological mechanisms independent from AD. Considering that NME8 plays a role in the ciliary function and displays SNP-related diversity in white matter changes, the mechanisms of NME8 in iNPH and other neurodegenerative processes are worth further study.

Subjects
Alzheimer’s disease   genetics   idiopathic normal pressure hydrocephalus   pathology   radiology   
URI
https://erepo.uef.fi/handle/123456789/7918
Link to the original item
http://dx.doi.org/10.3233/JAD-170583
Publisher
IOS Press
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  • Terveystieteiden tiedekunta [1335]
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