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Title: Vascular Contributions in Alzheimer’s Disease-Related N europathological Changes: First Autopsy Evidence from a South Asian Aging Population
Authors: Wijesinghe, P.
Shankar, S.K.
Yasha, T.C.
Gorrie, C.
Amaratunga, D.
Hulathduwa, S.
Kumara, K.S.
Samarasinghe, K.
Suh, Y.
Steinbusch, H.W.M.
De Silva, K.R.D.
Keywords: Alzheimer’s disease
apolipoprotein E
cerebral small vessel diseases
Issue Date: 2016
Publisher: IOS Press, Amsterdam
Citation: Wijesinghe, P., Shankar, S.K., Yasha, T.C., Gorrie, C., Amaratunga, D., Hulathduwa, S., Kumara, K.S., Samarasinghe, K., Suh, Y., Steinbusch, H.W.M., & De Silva, K.R.D. (2016). Vascular Contributions in Alzheimer’s Disease-Related N europathological Changes: First Autopsy Evidence from a South Asian Aging Population. Journal of Alzheimer’s Disease, 54, 1607-1618. doi: 10.3233/JAD-160425
Abstract: Background: Evidence from various consortia on vascular contributions has been inconsistent in determining the etiology of sporadic Alzheimer’s disease (AD). Objective: To investigate vascular risk factors and cerebrovascular pathologies associated in manifestation of AD-related neuropathological changes of an elderly population. Methods: Postmortem brain samples from 76 elderly subjects (>50 years) were used to study genetic polymorphisms, intracranial atherosclerosis of the circle of Willis (IASCW), and microscopic infarcts in deep white matters. From this cohort, 50 brains (>60 years) were subjected to neuropathological diagnosis using immunohistopathological techniques.Results: Besides the association with age, the apolipoprotein E e4 allele was significantly and strongly associated with Thai amyloid-p phases >1 [odds ratio (OR) = 6.76, 95% confidence interval (Cl) 1.37-33.45] and inversely with Braak neurofibrillary tangle (NFT) stages >111 (0.02,0.0-0.47). Illiterates showed a significant positive association for Braak NFT stages >IV (14.62, 1.21-176.73) and a significant negative association for microscopic infarcts (0.15, 0.03-0.71) in deep white matters. With respect to cerebrovascular pathologies, cerebral small vessel lesions (white matter hyperintensities and cerebral amyloid angiopathy) showed a higher degree of associations among them and with AD-related neuropathological changes (p < 0.05) compared to large vessel pathology (IASCW), which showed a significant association only with Braak NFT stages >1 (p = 0.050). Conclusion: These findings suggest that besides age, education, and genetic factors, other vascular risk factors were not associated with AD-related neuropathological changes and urge prompt actions be taken against cerebral small vessel diseases since evidence for effective prevention is still lacking.
ISSN: 1387-2877
Appears in Collections:Information Resources on Anatomy

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