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Interaction between IKLOTHO/I-VS Heterozygosity and IAPOE/I ε4 Allele Predicts Rate of Cognitive Decline in Late-Onset Alzheimer’s Disease
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Interaction between IKLOTHO/I-VS Heterozygosity and IAPOE/I ε4 Allele Predicts Rate of Cognitive Decline in Late-Onset Alzheimer’s Disease
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Interaction between IKLOTHO/I-VS Heterozygosity and IAPOE/I ε4 Allele Predicts Rate of Cognitive Decline in Late-Onset Alzheimer’s Disease
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Journal Article
Interaction between IKLOTHO/I-VS Heterozygosity and IAPOE/I ε4 Allele Predicts Rate of Cognitive Decline in Late-Onset Alzheimer’s Disease
2023
Overview
KLOTHO-VS heterozygosity (KL-VS[sup.het+] ) promotes longevity and protects against cognitive decline in aging. To determine whether KL-VS[sup.het+] mitigates Alzheimer’s disease (AD) progression, we used longitudinal linear-mixed models to compare the rate of change in multiple cognitive measures in AD patients stratified by APOE ε4 carrier status. We aggregated data on 665 participants (208 KL-VS[sup.het−] /ε4−, 307 KL-VS[sup.het−] /ε4+, 66 KL-VS[sup.het+] /ε4−, and 84 KL-VS[sup.het+] /ε4+) from two prospective cohorts, the National Alzheimer’s Coordinating Center and the Alzheimer’s Disease Neuroimaging Initiative. All participants were initially diagnosed with mild cognitive impairment, later developed AD dementia during the study, and had at least three subsequent visits. KL-VS[sup.het+] conferred slower cognitive decline in ε4 non-carriers (+0.287 MMSE points/year, p = 0.001; −0.104 CDR-SB points/year, p = 0.026; −0.042 ADCOMS points/year, p < 0.001) but not in ε4 carriers who generally had faster rates of decline than non-carriers. Stratified analyses showed that the protective effect of KL-VS[sup.het+] was particularly prominent in male participants, those who were older than the median baseline age of 76 years, or those who had an education level of at least 16 years. For the first time, our study provides evidence that KL-VS[sup.het+] status has a protective effect on AD progression and interacts with the ε4 allele.
Publisher
MDPI AG
