Effect of CLU genetic variants on cerebrospinal fluid and neuroimaging markers in healthy, mild cognitive impairment and Alzheimer’s disease cohorts

Male Risk 570 Aging Neuroimaging Neurodegenerative Alzheimer's Disease Hippocampus Polymorphism, Single Nucleotide 630 Article 03 medical and health sciences 0302 clinical medicine Clinical Research Alzheimer Disease Health Sciences Genetics Acquired Cognitive Impairment 80 and over 2.1 Biological and endogenous factors Humans Genetic Predisposition to Disease Polymorphism Aged Cerebrospinal Fluid Aged, 80 and over Amyloid beta-Peptides Neurosciences Alzheimer's Disease including Alzheimer's Disease Related Dementias (AD/ADRD) Single Nucleotide Alzheimer’s Disease Neuroimaging Initiative Organ Size Biological Sciences Brain Disorders 4.1 Discovery and preclinical testing of markers and technologies 3. Good health Clusterin Glucose Neurological Unfolded Protein Response Dementia Female Biomarkers
DOI: 10.1038/srep26027 Publication Date: 2016-05-27T09:38:19Z
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ABSTRACT
AbstractThe Clusterin (CLU) gene, also known as apolipoprotein J (ApoJ), is currently the third most associated late-onset Alzheimer’s disease (LOAD) risk gene. However, little was known about the possible effect of CLU genetic variants on AD pathology in brain. Here, we evaluated the interaction between 7 CLU SNPs (covering 95% of genetic variations) and the role of CLU in β-amyloid (Aβ) deposition, AD-related structure atrophy, abnormal glucose metabolism on neuroimaging and CSF markers to clarify the possible approach by that CLU impacts AD. Finally, four loci (rs11136000, rs1532278, rs2279590, rs7982) showed significant associations with the Aβ deposition at the baseline level while genotypes of rs9331888 (P = 0.042) increased Aβ deposition. Besides, rs9331888 was significantly associated with baseline volume of left hippocampus (P = 0.014). We then further validated the association with Aβ deposition in the AD, mild cognitive impairment (MCI), normal control (NC) sub-groups. The results in sub-groups confirmed the association between CLU genotypes and Aβ deposition further. Our findings revealed that CLU genotypes could probably modulate the cerebral the Aβ loads on imaging and volume of hippocampus. These findings raise the possibility that the biological effects of CLU may be relatively confined to neuroimaging trait and hence may offer clues to AD.
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