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Association between small-vessel disease, Alzheimer pathology studied

Date:
May 12, 2014
Source:
The JAMA Network Journals
Summary:
Cerebral small-vessel disease and Alzheimer disease pathology appear to be associated, new research indicates. "Our study supports the hypothesis that the pathways of SVD and AD pathology are interconnected. Small-vessel disease could provoke amyloid pathology while AD-associated cerebral amyloid pathology may lead to auxiliary vascular damage," researchers conclude.

Cerebral small-vessel disease (SVD) and Alzheimer disease (AD) pathology appear to be associated.

AD is believed to be caused by the buildup of amyloid protein in the brain and tau tangles. Previous studies have suggested that SVD and vascular risk factors increase the risk of developing AD. In both SVD and vascular dementia (VaD), signs of AD pathology have been seen. But it remains unclear how the interaction between SVD and AD pathology leads to dementia.

Authors examined the association between SVD and AD pathology by looking at magnetic resonance imaging (MRI)-based microbleeds (MB), white matter hyperintensities (WMH) and lacunes (which are measures for SVD) along with certain protein levels in cerebrospinal fluid (CSF) which reflect AD pathophysiology in patients with AD, VaD and healthy control patients. The authors also examined the relationship of apolipoprotein E (APOE) Ɛ4 genotype, a well-known risk factor for AD.

The presence of both MBs and WMH was associated with lower CSF levels of Aβ42, suggesting a direct relationship between SVD and AD. Amyloid deposits also appear to be abnormal in patients with SVD, especially in (APOE) Ɛ4 carriers.

"Our study supports the hypothesis that the pathways of SVD and AD pathology are interconnected. Small-vessel disease could provoke amyloid pathology while AD-associated cerebral amyloid pathology may lead to auxiliary vascular damage," researchers conclude.


Story Source:

The above story is based on materials provided by The JAMA Network Journals. Note: Materials may be edited for content and length.


Journal Reference:

  1. Maartje I. Kester, M.D., Ph.D. et al. Associations Between Cerebral Small-Vessel Disease and Alzheimer Disease Pathology as Measured by Cerebrospinal Fluid Biomarkers. JAMA Neurol., May 2014 DOI: 10.1001/.jamaneurol.2014.754

Cite This Page:

The JAMA Network Journals. "Association between small-vessel disease, Alzheimer pathology studied." ScienceDaily. ScienceDaily, 12 May 2014. <www.sciencedaily.com/releases/2014/05/140512214132.htm>.
The JAMA Network Journals. (2014, May 12). Association between small-vessel disease, Alzheimer pathology studied. ScienceDaily. Retrieved August 20, 2014 from www.sciencedaily.com/releases/2014/05/140512214132.htm
The JAMA Network Journals. "Association between small-vessel disease, Alzheimer pathology studied." ScienceDaily. www.sciencedaily.com/releases/2014/05/140512214132.htm (accessed August 20, 2014).

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