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Lozupone M, Dibello V, Sardone R, Castellana F, Zupo R, Lampignano L, Bortone I, Daniele A, Bellomo A, Solfrizzi V, Panza F. The Impact of Apolipoprotein E ( APOE) Epigenetics on Aging and Sporadic Alzheimer's Disease. BIOLOGY 2023; 12:1529. [PMID: 38132357 PMCID: PMC10740847 DOI: 10.3390/biology12121529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 12/08/2023] [Accepted: 12/12/2023] [Indexed: 12/23/2023]
Abstract
Sporadic Alzheimer's disease (AD) derives from an interplay among environmental factors and genetic variants, while epigenetic modifications have been expected to affect the onset and progression of its complex etiopathology. Carriers of one copy of the apolipoprotein E gene (APOE) ε4 allele have a 4-fold increased AD risk, while APOE ε4/ε4-carriers have a 12-fold increased risk of developing AD in comparison with the APOE ε3-carriers. The main longevity factor is the homozygous APOE ε3/ε3 genotype. In the present narrative review article, we summarized and described the role of APOE epigenetics in aging and AD pathophysiology. It is not fully understood how APOE variants may increase or decrease AD risk, but this gene may affect tau- and amyloid-mediated neurodegeneration directly or indirectly, also by affecting lipid metabolism and inflammation. For sporadic AD, epigenetic regulatory mechanisms may control and influence APOE expression in response to external insults. Diet, a major environmental factor, has been significantly associated with physical exercise, cognitive function, and the methylation level of several cytosine-phosphate-guanine (CpG) dinucleotide sites of APOE.
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Affiliation(s)
- Madia Lozupone
- Department of Translational Biomedicine and Neuroscience (DiBrain), University of Bari Aldo Moro, 70121 Bari, Italy;
| | - Vittorio Dibello
- Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, 1081 HV Amsterdam, The Netherlands;
| | - Rodolfo Sardone
- Local Healthcare Authority of Taranto, 74121 Taranto, Italy;
| | - Fabio Castellana
- Department of Interdisciplinary Medicine, Clinica Medica e Geriatria “Cesare Frugoni”, University of Bari Aldo Moro, 70121 Bari, Italy; (F.C.); (R.Z.); (V.S.)
| | - Roberta Zupo
- Department of Interdisciplinary Medicine, Clinica Medica e Geriatria “Cesare Frugoni”, University of Bari Aldo Moro, 70121 Bari, Italy; (F.C.); (R.Z.); (V.S.)
| | - Luisa Lampignano
- Local Healthcare Authority of Bari, ASL Bari, 70132 Bari, Italy;
| | - Ilaria Bortone
- Department of Translational Biomedicine and Neuroscience (DiBrain), University of Bari Aldo Moro, 70121 Bari, Italy;
| | - Antonio Daniele
- Department of Neuroscience, Catholic University of Sacred Heart, 00168 Rome, Italy;
- Neurology Unit, IRCCS Fondazione Policlinico Universitario A. Gemelli, 00168 Rome, Italy
| | - Antonello Bellomo
- Psychiatric Unit, Department of Clinical & Experimental Medicine, University of Foggia, 71122 Foggia, Italy;
| | - Vincenzo Solfrizzi
- Department of Interdisciplinary Medicine, Clinica Medica e Geriatria “Cesare Frugoni”, University of Bari Aldo Moro, 70121 Bari, Italy; (F.C.); (R.Z.); (V.S.)
| | - Francesco Panza
- Department of Interdisciplinary Medicine, Clinica Medica e Geriatria “Cesare Frugoni”, University of Bari Aldo Moro, 70121 Bari, Italy; (F.C.); (R.Z.); (V.S.)
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Housini M, Zhou Z, Gutierrez J, Rao S, Jomaa R, Subasinghe K, Reid DM, Silzer T, Phillips N, O'Bryant S, Barber RC. Top Alzheimer's disease risk allele frequencies differ in HABS-HD Mexican- versus Non-Hispanic White Americans. ALZHEIMER'S & DEMENTIA (AMSTERDAM, NETHERLANDS) 2023; 15:e12518. [PMID: 38155914 PMCID: PMC10752755 DOI: 10.1002/dad2.12518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 11/13/2023] [Accepted: 11/25/2023] [Indexed: 12/30/2023]
Abstract
INTRODUCTION: Here we evaluate frequencies of the top 10 Alzheimer's disease (AD) risk alleles for late-onset AD in Mexican American (MA) and non-Hispanic White (NHW) American participants enrolled in the Health and Aging Brain Study-Health Disparities Study cohort. METHODS: Using DNA extracted from this community-based diverse population, we calculated the genotype frequencies in each population to determine whether a significant difference is detected between the different ethnicities. DNA genotyping was performed per manufacturers' protocols. RESULTS: Allele and genotype frequencies for 9 of the 11 single nucleotide polymorphisms (two apolipoprotein E variants, CR1, BIN1, DRB1, NYAP1, PTK2B, FERMT2, and ABCA7) differed significantly between MAs and NHWs. DISCUSSION: The significant differences in frequencies of top AD risk alleles observed here across MAs and NHWs suggest that ethnicity-specific genetic risks for AD exist. Given our results, we are advancing additional projects to further elucidate ethnicity-specific differences in AD.
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Affiliation(s)
- Mohammad Housini
- Department of Pharmacology and NeuroscienceSchool of Biomedical SciencesUniversity of North Texas Health Science CenterFort WorthTexasUSA
- Department of Family Medicine & Manipulative MedicineTexas College of Osteopathic MedicineUniversity of North Texas Health Science CenterFort WorthTexasUSA
| | - Zhengyang Zhou
- Department of Biostatistics and EpidemiologySchool of Public HealthUniversity of North Texas Health Science CenterFort WorthTexasUSA
- Institute for Translational ResearchUNT Health Science CenterFort WorthTexasUSA
| | - John Gutierrez
- Department of Internal MedicineTexas Institute for Graduate Medical Education and ResearchSan AntonioTexasUSA
| | - Sumedha Rao
- Department of Family Medicine & Manipulative MedicineTexas College of Osteopathic MedicineUniversity of North Texas Health Science CenterFort WorthTexasUSA
| | - Rodwan Jomaa
- Department of Family Medicine & Manipulative MedicineTexas College of Osteopathic MedicineUniversity of North Texas Health Science CenterFort WorthTexasUSA
| | - Kumudu Subasinghe
- Department of MicrobiologyImmunology and GeneticsSchool of Biomedical SciencesUniversity of North Texas Health Science CenterFort WorthTexasUSA
| | - Danielle Marie Reid
- Department of MicrobiologyImmunology and GeneticsSchool of Biomedical SciencesUniversity of North Texas Health Science CenterFort WorthTexasUSA
| | - Talisa Silzer
- Department of MicrobiologyImmunology and GeneticsSchool of Biomedical SciencesUniversity of North Texas Health Science CenterFort WorthTexasUSA
| | - Nicole Phillips
- Institute for Translational ResearchUNT Health Science CenterFort WorthTexasUSA
- Department of MicrobiologyImmunology and GeneticsSchool of Biomedical SciencesUniversity of North Texas Health Science CenterFort WorthTexasUSA
| | - Sid O'Bryant
- Department of Family Medicine & Manipulative MedicineTexas College of Osteopathic MedicineUniversity of North Texas Health Science CenterFort WorthTexasUSA
- Institute for Translational ResearchUNT Health Science CenterFort WorthTexasUSA
| | - Robert Clinton Barber
- Department of Family Medicine & Manipulative MedicineTexas College of Osteopathic MedicineUniversity of North Texas Health Science CenterFort WorthTexasUSA
- Institute for Translational ResearchUNT Health Science CenterFort WorthTexasUSA
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Wan H, Chen H, Zhang M, Feng T, Wang Y. Cerebral microbleeds is associated with dementia in Parkinson's disease. Acta Neurol Belg 2023; 123:407-413. [PMID: 35672560 DOI: 10.1007/s13760-022-01918-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 03/07/2022] [Indexed: 11/01/2022]
Abstract
INTRODUCTION Emerging evidence suggests that cerebral small vessel disease (CSVD) may worsen cognitive functions in Parkinson's disease (PD). However, the effect of microbleeds on cognitive function in patients with PD remains unknown. This study explored the association between the presence, number and location of microbleeds with dementia in PD patients. METHODS This cross-sectional study included 431 patients with PD from Beijing Tiantan Hospital from May 2016 to August 2019. Cognition assessments (MMSE, MoCA) were performed for these patients. MRI imaging sequences were obtained and reviewed independently by two well-trained readers who were blind to all clinical data. Spearman's correlation analysis and logistic regression model analysis were further used for the assessments. RESULTS An association between cerebral microbleeds with cognitive ability and dementia in PD patients was revealed. A significance was observed between the total number of microbleeds and two widely used scores of cognitive assessments (Spearman R = - 0.120 to MMSE with a p = 0.016, and - 0.117 to MoCA with a p = 0.020). In detail, infratentorial microbleeds were associated with the level of cognition in PD patients (Spearman R = - 0.099 to MMSE with a p = 0.049, and - 0.116 to MoCA with a p = 0.021). Furthermore, logistic regression analysis results also confirmed such correlations between the number of microbleeds and cognitive ability after adjusting for age, cholesterol level, Hamilton Anxiety Scale, Hamilton Depression Scale, and white matter hyperintensity Fazekas score (OR 3.28, p = 0.035, 95% CI 1.090-9.892). CONCLUSIONS The occurrence of microbleeds, especially in the infratentorial locations, may worsen the cognitive function of PD patients and result in dementia. Management of cerebral vascular disease could be beneficial to patients with PD.
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Affiliation(s)
- Huijuan Wan
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, 119 South 4th Ring West Road, Fengtai District, Beijing, 100070, China
- China National Clinical Research Center for Neurological Diseases (NCRC-ND), Beijing, China
- Advanced Innovation Center for Human Brain Projection, Capital Medical University, Beijing, China
- Department of Neurology, First Affiliated Hospital, Xiamen University, Xiamen, China
| | - Huimin Chen
- Department of Neurology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing, China
| | - Meimei Zhang
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, 119 South 4th Ring West Road, Fengtai District, Beijing, 100070, China
- China National Clinical Research Center for Neurological Diseases (NCRC-ND), Beijing, China
- Advanced Innovation Center for Human Brain Projection, Capital Medical University, Beijing, China
| | - Tao Feng
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, 119 South 4th Ring West Road, Fengtai District, Beijing, 100070, China.
- China National Clinical Research Center for Neurological Diseases (NCRC-ND), Beijing, China.
- Advanced Innovation Center for Human Brain Projection, Capital Medical University, Beijing, China.
| | - Yilong Wang
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, 119 South 4th Ring West Road, Fengtai District, Beijing, 100070, China.
- China National Clinical Research Center for Neurological Diseases (NCRC-ND), Beijing, China.
- Advanced Innovation Center for Human Brain Projection, Capital Medical University, Beijing, China.
- Beijing Key Laboratory of Translational Medicine for Cerebrovascular Disease, Beijing, China.
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Abraham Daniel A, Silzer T, Sun J, Zhou Z, Hall C, Phillips N, Barber R. Hypermethylation at CREBBP Is Associated with Cognitive Impairment in a Mexican American Cohort. J Alzheimers Dis 2023; 92:1229-1239. [PMID: 36872777 PMCID: PMC10200223 DOI: 10.3233/jad-221031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/01/2023] [Indexed: 03/06/2023]
Abstract
BACKGROUND The aging Mexican American (MA) population is the fastest growing ethnic minority group in the US. MAs have a unique metabolic-related risk for Alzheimer's disease (AD) and mild cognitive impairment (MCI), compared to non-Hispanic whites (NHW). This risk for cognitive impairment (CI) is multifactorial involving genetics, environmental, and lifestyle factors. Changes in environment and lifestyle can alter patterns and even possibly reverse derangement of DNA methylation (a form of epigenetic regulation). OBJECTIVE We sought to identify ethnicity-specific DNA methylation profiles that may be associated with CI in MAs and NHWs. METHODS DNA obtained from peripheral blood of 551 participants from the Texas Alzheimer's Research and Care Consortium was typed on the Illumina Infinium® MethylationEPIC chip array, which assesses over 850K CpG genomic sites. Within each ethnic group (N = 299 MAs, N = 252 NHWs), participants were stratified by cognitive status (control versus CI). Beta values, representing relative degree of methylation, were normalized using the Beta MIxture Quantile dilation method and assessed for differential methylation using the Chip Analysis Methylation Pipeline (ChAMP), limma and cate packages in R. RESULTS Two differentially methylated sites were significant: cg13135255 (MAs) and cg27002303 (NHWs) based on an FDR p < 0.05. Three suggestive sites obtained were cg01887506 (MAs) and cg10607142 and cg13529380 (NHWs). Most methylation sites were hypermethylated in CI compared to controls, except cg13529380 which was hypomethylated. CONCLUSION The strongest association with CI was at cg13135255 (FDR-adjusted p = 0.029 in MAs), within the CREBBP gene. Moving forward, identifying additional ethnicity-specific methylation sites may be useful to discern CI risk in MAs.
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Affiliation(s)
- Ann Abraham Daniel
- Department of Microbiology, Immunology and Genetics, School of Biomedical Sciences, University of North Texas Health Science Center, Fort Worth, TX, USA
| | - Talisa Silzer
- Department of Microbiology, Immunology and Genetics, School of Biomedical Sciences, University of North Texas Health Science Center, Fort Worth, TX, USA
| | - Jie Sun
- Department of Microbiology, Immunology and Genetics, School of Biomedical Sciences, University of North Texas Health Science Center, Fort Worth, TX, USA
| | - Zhengyang Zhou
- Department of Biostatistics and Epidemiology, School of Public Health, University of North Texas Health Science Center, Fort Worth, TX, USA
| | - Courtney Hall
- Department of Microbiology, Immunology and Genetics, School of Biomedical Sciences, University of North Texas Health Science Center, Fort Worth, TX, USA
| | - Nicole Phillips
- Department of Microbiology, Immunology and Genetics, School of Biomedical Sciences, University of North Texas Health Science Center, Fort Worth, TX, USA
| | - Robert Barber
- Department of Family and Manipulative Medicine, Texas College of Osteopathic Medicine, University of North Texas Health Science Center, Fort Worth, TX, USA
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Shen B, Hernandez DG, Chitrala KN, Fanelli-Kuczmarski MT, Noren Hooten N, Pacheco NL, Mode NA, Zonderman AB, Ezike N, Evans MK. APOE gene region methylation is associated with cognitive performance in middle-aged urban adults. Neurobiol Aging 2022; 116:41-48. [PMID: 35561457 PMCID: PMC10878469 DOI: 10.1016/j.neurobiolaging.2022.03.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 03/14/2022] [Accepted: 03/16/2022] [Indexed: 11/17/2022]
Abstract
Apolipoprotein (APOE) ε4 allele is a strong risk factor for Alzheimer's disease (AD) and cognitive decline. Epigenetic modifications such as DNA methylation (DNAm) play a central role in cognition. This study sought to identify DNAm sites in the APOE genomic region associated with cognitive performance in a racially diverse middle-aged cohort (n = 411). Cognitive performance was measured by 11 standard neuropsychological tests. Two CpG sites were associated with the Card Rotation and Benton Visual Retention cognitive tests. The methylation level of the CpG site cg00397545 was associated with Card Rotation Test score (p = 0.000177) and a novel CpG site cg10178308 was associated with Benton Visual Retention Test score (p = 0.000084). Significant associations were observed among the dietary inflammatory index, which reflects the inflammatory potential of the diet, cognitive performance and the methylation level of several CpG sites. Our results indicate that DNAm in the APOE genomic area is correlated with cognitive performance and may presage cognitive decline.
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Affiliation(s)
- Botong Shen
- Laboratory of Epidemiology and Population Science, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
| | - Dena G Hernandez
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Kumaraswamy Naidu Chitrala
- Fels Institute for Personalized Medicine, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, USA
| | - Marie T Fanelli-Kuczmarski
- Laboratory of Epidemiology and Population Science, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
| | - Nicole Noren Hooten
- Laboratory of Epidemiology and Population Science, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
| | - Natasha L Pacheco
- Laboratory of Epidemiology and Population Science, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
| | - Nicolle A Mode
- Laboratory of Epidemiology and Population Science, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
| | - Alan B Zonderman
- Laboratory of Epidemiology and Population Science, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
| | - Ngozi Ezike
- Laboratory of Epidemiology and Population Science, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA
| | - Michele K Evans
- Laboratory of Epidemiology and Population Science, National Institute on Aging, National Institutes of Health, Baltimore, MD, USA.
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Corley MJ, Yokoyama JS. Candidate Epigenetic Biomarker of Cognitive Trajectory: The Chicken or the Egg? Biol Psychiatry 2022; 91:332-334. [PMID: 35057971 DOI: 10.1016/j.biopsych.2021.11.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 11/17/2021] [Indexed: 11/24/2022]
Affiliation(s)
- Michael J Corley
- Division of Infectious Diseases, Department of Medicine, Weill Cornell Medicine, New York, New York
| | - Jennifer S Yokoyama
- Memory and Aging Center, Department of Neurology, San Francisco, California; Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, California.
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Basavaraju P, Balasubramani R, Kathiresan DS, Devaraj I, Babu K, Alagarsamy V, Puthamohan VM. Genetic Regulatory Networks of Apolipoproteins and Associated Medical Risks. Front Cardiovasc Med 2022; 8:788852. [PMID: 35071357 PMCID: PMC8770923 DOI: 10.3389/fcvm.2021.788852] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2021] [Accepted: 11/22/2021] [Indexed: 12/22/2022] Open
Abstract
Apolipoproteins (APO proteins) are the lipoprotein family proteins that play key roles in transporting lipoproteins all over the body. There are nearly more than twenty members reported in the APO protein family, among which the A, B, C, E, and L play major roles in contributing genetic risks to several disorders. Among these genetic risks, the single nucleotide polymorphisms (SNPs), involving the variation of single nucleotide base pairs, and their contributing polymorphisms play crucial roles in the apolipoprotein family and its concordant disease heterogeneity that have predominantly recurred through the years. In this review, we have contributed a handful of information on such genetic polymorphisms that include APOE, ApoA1/B ratio, and A1/C3/A4/A5 gene cluster-based population genetic studies carried throughout the world, to elaborately discuss the effects of various genetic polymorphisms in imparting various medical conditions, such as obesity, cardiovascular, stroke, Alzheimer's disease, diabetes, vascular complications, and other associated risks.
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Affiliation(s)
- Preethi Basavaraju
- Biomaterials and Nano-Medicine Laboratory, Department of Human Genetics and Molecular Biology, Bharathiar University, Coimbatore, India
| | - Rubadevi Balasubramani
- Biomaterials and Nano-Medicine Laboratory, Department of Human Genetics and Molecular Biology, Bharathiar University, Coimbatore, India
| | - Divya Sri Kathiresan
- Biomaterials and Nano-Medicine Laboratory, Department of Human Genetics and Molecular Biology, Bharathiar University, Coimbatore, India
| | - Ilakkiyapavai Devaraj
- Biomaterials and Nano-Medicine Laboratory, Department of Human Genetics and Molecular Biology, Bharathiar University, Coimbatore, India
| | - Kavipriya Babu
- Biomaterials and Nano-Medicine Laboratory, Department of Human Genetics and Molecular Biology, Bharathiar University, Coimbatore, India
| | - Vasanthakumar Alagarsamy
- Biomaterials and Nano-Medicine Laboratory, Department of Human Genetics and Molecular Biology, Bharathiar University, Coimbatore, India
| | - Vinayaga Moorthi Puthamohan
- Department of Human Genetics and Molecular Biology, Bharathiar University, Coimbatore, India
- *Correspondence: Vinayaga Moorthi Puthamohan
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Qin W, Li W, Wang Q, Gong M, Li T, Shi Y, Song Y, Li Y, Li F, Jia J. Race-Related Association between APOE Genotype and Alzheimer's Disease: A Systematic Review and Meta-Analysis. J Alzheimers Dis 2021; 83:897-906. [PMID: 34334408 DOI: 10.3233/jad-210549] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND The global race-dependent association of Alzheimer's disease (AD) and apolipoprotein E (APOE) genotype is not well understood. Transethnic analysis of APOE could clarify the role of genetics in AD risk across populations. OBJECTIVE This study aims to determine how race and APOE genotype affect the risks for AD. METHODS We performed a systematic search of PubMed, Embase, Web of Science, and the Cochrane Library since 1993 to Aug 25, 2020. A total of 10,395 reports were identified, and 133 were eligible for analysis with data on 77,402 participants. Studies contained AD clinical diagnostic and APOE genotype data. Homogeneous data sets were pooled in case-control analyses. Odds ratios and 95% confidence intervals for developing AD were calculated for populations of different races and APOE genotypes. RESULTS The proportion of APOE genotypes and alleles differed between populations of different races. Results showed that APOEɛ4 was a risk factor for AD, whereas APOEɛ2 protected against it. The effects of APOEɛ4 and ɛ2 on AD risk were distinct in various races, they were substantially attenuated among Black people. Sub-group analysis found a higher frequency of APOEɛ4/ɛ4 and lower frequency of APOEɛ3/ɛ3 among early-onset AD than late-onset AD in a combined group and different races. CONCLUSION Our meta-analysis suggests that the association of APOE genotypes and AD differ between races. These results enhance our understanding of APOE-related risk for AD across race backgrounds and provide new insights into precision medicine for AD.
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Affiliation(s)
- Wei Qin
- Innovation Center for Neurological Disorders and Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Wenwen Li
- Innovation Center for Neurological Disorders and Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Qi Wang
- Innovation Center for Neurological Disorders and Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Min Gong
- Innovation Center for Neurological Disorders and Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Tingting Li
- Innovation Center for Neurological Disorders and Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Yuqing Shi
- Innovation Center for Neurological Disorders and Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Yang Song
- Innovation Center for Neurological Disorders and Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Ying Li
- Innovation Center for Neurological Disorders and Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Fangyu Li
- Innovation Center for Neurological Disorders and Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Jianping Jia
- Innovation Center for Neurological Disorders and Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Geriatric Cognitive Disorders, Beijing, China.,Clinical Center for Neurodegenerative Disease and Memory Impairment, Capital Medical University, Beijing, China.,Center of Alzheimer's Disease, Beijing Institute for Brain Disorders, Beijing, China
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Zhu Z, Yang Y, Xiao Z, Zhao Q, Wu W, Liang X, Luo J, Cao Y, Shao M, Guo Q, Ding D. TOMM40 and APOE variants synergistically increase the risk of Alzheimer's disease in a Chinese population. Aging Clin Exp Res 2021; 33:1667-1675. [PMID: 32725468 DOI: 10.1007/s40520-020-01661-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Accepted: 07/14/2020] [Indexed: 12/22/2022]
Abstract
BACKGROUND The apolipoprotein E (APOE) ε4 allele is a strong risk factor for Alzheimer's disease (AD) in Caucasian and African American populations. It suggests that other genetic factors may modulate AD pathogenesis in Chinese populations, among which the frequency of this allele is reduced but the AD prevalence is maintained. The translocase of outer mitochondrial membrane 40 (TOMM40), which is located adjacent to APOE, may play an APOE-dependent role in modulating AD pathogenesis. AIMS This work aimed to investigate whether TOMM40 polymorphisms modulate AD risk independently of, or in conjunction with APOE polymorphisms in Chinese populations. METHODS We conducted a case-control study including 834 patients with AD recruited from the Memory Clinic and 643 cognitively normal participants recruited from the community. The Taqman SNP method was used for APOE genotyping, while TOMM40 polymorphism genotyping was conducted via a polymerase chain reaction-ligase detection reaction. RESULTS The TOMM40 rs10119 and rs71352238 alleles were associated with AD independently of the patient APOE status. The rs10119 AA genotype and rs71352238 CC genotype were risk genotypes of AD. Individuals carrying a TOMM40 rs10119 GG/APOE ε4+ (OR, 3.73; 95% CI 1.49-9.37; P = 0.005), TOMM40 rs10119 AG/APOE ε4+ (OR, 4.16; 95% CI 3.30-5.24; P < 0.001), or TOMM40 rs10119 AA/APOE ε4+ (OR, 14.78; 95% CI 8.56-25.54; P < 0.001) genotype exhibited a significantly higher AD risk. Those carrying a TOMM40 rs71352238 TT/APOE ε4+ (OR, 3.82; 95% CI 2.32-6.29; P < 0.001), TOMM40 rs71352238 CT/APOE ε4+ (OR, 4.40; 95% CI 3.46-5.56; P < 0.001), or TOMM40 rs71352238 CC/APOE ε4+ (OR, 14.02; 95% CI 7.81-25.17; P < 0.001) genotype also exhibited a significantly increased AD risk. DISCUSSION AND CONCLUSIONS This study provides invaluable insights into the mechanisms underlying the prevalence of AD in Chinese populations, and supports that simultaneous TOMM40 and APOE genotyping in the clinical setting may identify individuals at high risk of developing AD.
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Affiliation(s)
- Zheng Zhu
- Institute of Neurology, Huashan Hospital, Fudan University, Shanghai, China
- National Clinical Research Center for Aging Diseases, Shanghai, China
| | - Yang Yang
- Guanghan Personal Health Research Institute, Shanghai, China
| | - Zhenxu Xiao
- Institute of Neurology, Huashan Hospital, Fudan University, Shanghai, China
- National Clinical Research Center for Aging Diseases, Shanghai, China
| | - Qianhua Zhao
- Institute of Neurology, Huashan Hospital, Fudan University, Shanghai, China.
- National Clinical Research Center for Aging Diseases, Shanghai, China.
| | - Wanqing Wu
- Institute of Neurology, Huashan Hospital, Fudan University, Shanghai, China
- National Clinical Research Center for Aging Diseases, Shanghai, China
| | - Xiaoniu Liang
- Institute of Neurology, Huashan Hospital, Fudan University, Shanghai, China
- National Clinical Research Center for Aging Diseases, Shanghai, China
| | - Jianfeng Luo
- Department of Biostatistics, School of Public Health, Fudan University, Shanghai, China
| | - Yang Cao
- Clinical Epidemiology and Biostatistics, School of Medical Sciences, Örebro University, Örebro, Sweden
| | - Minhua Shao
- Guanghan Personal Health Research Institute, Shanghai, China
| | - Qihao Guo
- Institute of Neurology, Huashan Hospital, Fudan University, Shanghai, China
- National Clinical Research Center for Aging Diseases, Shanghai, China
| | - Ding Ding
- Institute of Neurology, Huashan Hospital, Fudan University, Shanghai, China
- National Clinical Research Center for Aging Diseases, Shanghai, China
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Zhu X, Borenstein AR, Zheng Y, Zhang W, Seidner DL, Ness R, Murff HJ, Li B, Shrubsole MJ, Yu C, Hou L, Dai Q. Ca:Mg Ratio, APOE Cytosine Modifications, and Cognitive Function: Results from a Randomized Trial. J Alzheimers Dis 2021; 75:85-98. [PMID: 32280092 DOI: 10.3233/jad-191223] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
BACKGROUND Deterioration of ionized calcium (Ca2+) handling in neurons could lead to neurodegenerative disease. Magnesium (Mg) antagonizes Ca during many physiologic activities, including energy metabolism and catalyzation of demethylation from 5-methylcytosine(5-mC) to 5-hydroxymethylcytosine(5-hmC). OBJECTIVE To test the hypothesis that actively reducing the Ca:Mg intake ratio in the diet through Mg supplementation improves cognitive function, and to test whether this effect is partially mediated by modified cytosines in Apolipoprotein E (APOE). METHODS This study is nested within the Personalized Prevention of Colorectal Cancer Trial (PPCCT), a double-blind 2×2 factorial randomized controlled trial, which enrolled 250 participants from Vanderbilt University Medical Center. Target doses for both Mg and placebo arms were personalized. RESULTS Among those aged > 65 years old who consumed a high Ca:Mg ratio diet, we found that reducing the Ca:Mg ratio to around 2.3 by personalized Mg supplementation significantly improved cognitive function by 9.1% (p = 0.03). We also found that reducing the Ca:Mg ratio significantly reduced 5-mC at the cg13496662 and cg06750524 sites only among those aged > 65 years old (p values = 0.02 and 0.03, respectively). Furthermore, the beneficial effect of reducing the Ca:Mg ratio on cognitive function in those aged over 65 years was partially mediated by reductions in 5-mC levels (i.e., cg13496662 and cg06750524) in APOE (p for indirect effect = 0.05). CONCLUSION Our findings suggest that, among those age 65 and over with a high dietary Ca:Mg ratio, optimal Mg status may improve cognitive function partially through modifications in APOE methylation. These findings, if confirmed, have significant implications for the prevention of cognitive aging and Alzheimer's disease.Clinical Trial Registry number and website: #100106 https://clinicaltrials.gov/ct2/show/NCT03265483.
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Affiliation(s)
- Xiangzhu Zhu
- Department of Medicine, Division of Epidemiology, Vanderbilt Epidemiology Center, Vanderbilt University School of Medicine, Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Amy R Borenstein
- Department of Family Medicine and Public Health, Division of Epidemiology, University of California-San Diego School of Medicine, La Jolla, CA, USA
| | - Yinan Zheng
- Department of Preventive Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Wei Zhang
- Department of Preventive Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Douglas L Seidner
- Department of Medicine, Division of Gastroenterology, Vanderbilt School of Medicine, Nashville, TN, USA
| | - Reid Ness
- Department of Medicine, Division of Gastroenterology, Vanderbilt School of Medicine, Nashville, TN, USA
| | - Harvey J Murff
- Division of Geriatric Medicine, General Internal Medicine and Public Health, Vanderbilt University School of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Bingshan Li
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN, USA
| | - Martha J Shrubsole
- Department of Medicine, Division of Epidemiology, Vanderbilt Epidemiology Center, Vanderbilt University School of Medicine, Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Chang Yu
- Department of Biostatistics, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Lifang Hou
- Department of Preventive Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Qi Dai
- Department of Medicine, Division of Epidemiology, Vanderbilt Epidemiology Center, Vanderbilt University School of Medicine, Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, TN, USA
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11
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Bezuch N, Bradburn S, Robinson AC, Pendleton N, Payton A, Murgatroyd C. Superior Frontal Gyrus TOMM40-APOE Locus DNA Methylation in Alzheimer's Disease. J Alzheimers Dis Rep 2021; 5:275-282. [PMID: 34113784 PMCID: PMC8150259 DOI: 10.3233/adr-201000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Background: The APOE ɛ4 allele is the strongest known genetic risk factor for sporadic Alzheimer’s disease (AD). The neighboring TOMM40 gene has also been implicated in AD due to its close proximity to APOE. Objective: Here we tested whether methylation of the TOMM40-APOE locus may influence ApoE protein levels and AD pathology. Methods: DNA methylation levels across the TOMM40-APOE locus and ApoE levels were measured in superior frontal gyrus tissues of 62 human brains genotyped for APOE and scored for AD neuropathology. Results: Methylation levels within the TOMM40 CpG island in the promoter or APOE CpG island in Exon 4 did not differ between APOE ɛ4 carriers versus non-carriers. However, APOE ɛ4 carriers had significantly higher methylation the APOE promoter compared with non-carriers. Although DNA methylation at TOMM40, APOE promoter region, or APOE did not differ between AD pathological groups, there was a negative association between TOMM40 methylation and CERAD scores. ApoE protein concentrations did not significantly different between APOE ɛ4 carriers and non-carriers, or between AD pathological groups. Finally, there was no correlation between ApoE protein concentrations and DNA methylation levels. Conclusion: APOE gene methylation may not be affected by genotype, relate to AD pathology or ApoE protein levels in the superior frontal gyrus, though, DNA methylation at the ApoE promoter differed between genotype. DNA methylation at TOMM40 associated with amyloid-β plaques and longitudinal fluid intelligence. In sum, these results suggest a complicated regulation of the TOMM40-APOE locus in the brain in controlling ApoE protein levels and AD neuropathology.
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Affiliation(s)
- Natalia Bezuch
- Department of Life Sciences, Manchester Metropolitan University, Manchester, UK
| | - Steven Bradburn
- Department of Life Sciences, Manchester Metropolitan University, Manchester, UK
| | - Andrew C Robinson
- Faculty of Biology, Medicine and Health, School of Biological Sciences, Division of Neuroscience & Experimental Psychology, University of Manchester, Salford Royal Hospital, Salford, UK
| | - Neil Pendleton
- Faculty of Biology, Medicine and Health, School of Biological Sciences, Division of Neuroscience & Experimental Psychology, University of Manchester, Salford Royal Hospital, Salford, UK
| | - Antony Payton
- Division of Informatics, Imaging & Data Sciences, School of Health Sciences, The University of Manchester, Manchester, UK
| | - Chris Murgatroyd
- Department of Life Sciences, Manchester Metropolitan University, Manchester, UK
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12
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Mehta SR, Iudicello JE, Lin J, Ellis RJ, Morgan E, Okwuegbuna O, Cookson D, Karris M, Saloner R, Heaton R, Grant I, Letendre S. Telomere length is associated with HIV infection, methamphetamine use, inflammation, and comorbid disease risk. Drug Alcohol Depend 2021; 221:108639. [PMID: 33621803 PMCID: PMC8026664 DOI: 10.1016/j.drugalcdep.2021.108639] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Revised: 01/17/2021] [Accepted: 02/01/2021] [Indexed: 01/10/2023]
Abstract
BACKGROUND HIV infection and methamphetamine dependence (METH) are each associated with inflammation and premature aging, but their impact on biological aging is difficult to measure. Here we examined the impact of HIV and METH on leukocyte telomere lengths (LTL), and the correlations between LTL and other aging biomarkers. METHODS The study was a cross-sectional analysis of 161 individuals categorized by HIV and methamphetamine (METH) dependence status into four groups: HIV-METH- (n = 50), HIV-METH+ (n = 29), HIV + METH- (n = 40), and HIV + METH+ (n = 42). We analyzed the relationships of leukocyte telomere length (telomere to single copy gene [T/S] ratio) with demographic and clinical data as well as a panel of biomarkers of inflammation and endothelial activation measured in blood and cerebrospinal fluid (CSF). RESULTS HIV and METH were independently associated with shorter T/S ratio, even after adjusting for demographics and leukocyte count (R2 = 0·59, p < 0·0001). Higher plasma C-reactive protein (p = 0·0036) and CSF VCAM-1 (p = 0·0080) were also associated with shorter T/S ratio. A shorter T/S ratio was associated with higher risk for cardiovascular disease (p < 0·0001) and stroke (p < 0·0001), worse motor functioning (p = 0·037) and processing speed (p = 0·023), more depressive symptoms (p = 0·013), and higher CSF neurofilament-light (p = 0·003). CONCLUSIONS HIV and METH dependence were each associated with shorter telomeres. After adjusting for demographics, HIV, and METH, T/S ratio remained associated with aging-related outcomes including neurocognitive impairment, neurodegeneration, risks of cardiovascular disease and stroke. While not establishing causality, this study supports using the T/S ratio as a biomarker for estimating the impact of HIV and comorbidities on long-term health.
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Affiliation(s)
- Sanjay R Mehta
- Department of Medicine University of California San Diego, 9500 Gilman Drive La Jolla, CA, 92093, USA; San Diego Veterans Affairs Healthcare System, San Diego, CA, 92131, USA.
| | - Jennifer E Iudicello
- Department of Psychiatry University of California San Diego, 9500 Gilman Drive La Jolla, CA, 92093, USA
| | - Jue Lin
- Department of Biophysics and Biochemistry University of California San Francisco, CA, USA
| | - Ronald J Ellis
- Department of Neurology University of California San Diego, 9500 Gilman Drive La Jolla, CA, 92093, USA
| | - Erin Morgan
- Department of Psychiatry University of California San Diego, 9500 Gilman Drive La Jolla, CA, 92093, USA
| | - Oluwakemi Okwuegbuna
- Department of Medicine University of California San Diego, 9500 Gilman Drive La Jolla, CA, 92093, USA
| | - Debra Cookson
- Department of Psychiatry University of California San Diego, 9500 Gilman Drive La Jolla, CA, 92093, USA
| | - Maile Karris
- Department of Medicine University of California San Diego, 9500 Gilman Drive La Jolla, CA, 92093, USA
| | - Rowan Saloner
- Department of Psychiatry University of California San Diego, 9500 Gilman Drive La Jolla, CA, 92093, USA
| | - Robert Heaton
- Department of Psychiatry University of California San Diego, 9500 Gilman Drive La Jolla, CA, 92093, USA
| | - Igor Grant
- Department of Psychiatry University of California San Diego, 9500 Gilman Drive La Jolla, CA, 92093, USA
| | - Scott Letendre
- Department of Medicine University of California San Diego, 9500 Gilman Drive La Jolla, CA, 92093, USA
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13
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Griswold AJ, Celis K, Bussies PL, Rajabli F, Whitehead PL, Hamilton-Nelson KL, Beecham GW, Dykxhoorn DM, Nuytemans K, Wang L, Gardner OK, Dorfsman DA, Bigio EH, Mesulam MM, Weintraub S, Geula C, Gearing M, McGrath-Martinez E, Dalgard CL, Scott WK, Haines JL, Pericak-Vance MA, Young JI, Vance JM. Increased APOE ε4 expression is associated with the difference in Alzheimer's disease risk from diverse ancestral backgrounds. Alzheimers Dement 2021; 17:1179-1188. [PMID: 33522086 DOI: 10.1002/alz.12287] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 12/02/2020] [Accepted: 12/06/2020] [Indexed: 12/30/2022]
Abstract
INTRODUCTION Apolipoprotein E (APOE) ε4 confers less risk for Alzheimer's disease (AD) in carriers with African local genomic ancestry (ALA) than APOE ε4 carriers with European local ancestry (ELA). Cell type specific transcriptional variation between the two local ancestries (LAs) could contribute to this disease risk differences. METHODS Single-nucleus RNA sequencing was performed on frozen frontal cortex of homozygous APOE ε4/ε4 AD patients: seven with ELA, four with ALA. RESULTS A total of 60,908 nuclei were sequenced. Within the LA region (chr19:44-46Mb), APOE was the gene most differentially expressed, with ELA carriers having significantly more expression (overall P < 1.8E-317 ) in 24 of 32 cell clusters. The transcriptome of one astrocyte cluster, with high APOE ε4 expression and specific to ELA, is suggestive of A1 reactive astrocytes. DISCUSSION AD patients with ELA expressed significantly greater levels of APOE than ALA APOE ε4 carriers. These differences in APOE expression could contribute to the reduced risk for AD seen in African APOE ε4 carriers.
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Affiliation(s)
- Anthony J Griswold
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, Florida, USA.,Dr. John T Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Katrina Celis
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, Florida, USA
| | - Parker L Bussies
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, Florida, USA
| | - Farid Rajabli
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, Florida, USA
| | - Patrice L Whitehead
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, Florida, USA
| | - Kara L Hamilton-Nelson
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, Florida, USA
| | - Gary W Beecham
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, Florida, USA.,Dr. John T Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Derek M Dykxhoorn
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, Florida, USA.,Dr. John T Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Karen Nuytemans
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, Florida, USA.,Dr. John T Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Liyong Wang
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, Florida, USA.,Dr. John T Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Olivia K Gardner
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, Florida, USA
| | - Daniel A Dorfsman
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, Florida, USA
| | - Eileen H Bigio
- Northwestern ADC Neuropathology Core, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Marek Marsel Mesulam
- Northwestern ADC Neuropathology Core, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Sandra Weintraub
- Northwestern ADC Neuropathology Core, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Changiz Geula
- Northwestern ADC Neuropathology Core, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Marla Gearing
- Goizueta Alzheimer's Disease Research Center, Emory University, Atlanta, Georgia, USA
| | - Elisa McGrath-Martinez
- The American Genome Center, Uniformed Services University, Bethesda, Maryland, USA.,Collaborative Health Initiative Research Program, Henry Jackson Foundation, Bethesda, Maryland, USA
| | - Clifton L Dalgard
- Collaborative Health Initiative Research Program, Henry Jackson Foundation, Bethesda, Maryland, USA.,Department of Anatomy Physiology & Genetics, Uniformed Services University, Bethesda, Maryland, USA
| | - William K Scott
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, Florida, USA.,Dr. John T Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Jonathan L Haines
- Cleveland Institute for Computational Biology, Case Western Reserve University, Cleveland, Ohio, USA
| | - Margaret A Pericak-Vance
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, Florida, USA.,Dr. John T Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Juan I Young
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, Florida, USA.,Dr. John T Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Jeffery M Vance
- John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Miami, Florida, USA.,Dr. John T Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, Florida, USA
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14
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Bagheri S, Saboury AA. What role do metals play in Alzheimer's disease? JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2021. [DOI: 10.1007/s13738-021-02181-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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15
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Association between ApoE ε4 Carrier Status and Cardiovascular Risk Factors on Mild Cognitive Impairment among Mexican Older Adults. Brain Sci 2021; 11:brainsci11010068. [PMID: 33430178 PMCID: PMC7825603 DOI: 10.3390/brainsci11010068] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 12/22/2020] [Accepted: 01/04/2021] [Indexed: 11/17/2022] Open
Abstract
Mild cognitive impairment (MCI) (amnestic or non-amnestic) has different clinical and neuropsychological characteristics, and its evolution is heterogeneous. Cardiovascular risk factors (CVRF), such as hypertension, diabetes, or dyslipidemia, and the presence of the Apolipoprotein E ε4 (ApoE ε4) polymorphism have been associated with an increased risk of developing Alzheimer’s disease (AD) and other dementias but the relationship is inconsistent worldwide. We aimed to establish the association between the ApoE ε4 carrier status and CVRF on MCI subtypes (amnestic and non-amnestic) in Mexican older adults. Cross-sectional study including 137 older adults (n = 63 with normal cognition (NC), n = 24 with amnesic, and n = 50 with non-amnesic MCI). Multinomial logistic regression models were performed in order to determine the association between ApoE ε4 polymorphism carrier and CVRF on amnestic and non-amnestic-MCI. ApoE ε4 carrier status was present in 28.8% participants. The models showed that ApoE ε4 carrier status was not associated neither aMCI nor naMCI condition. The interaction term ApoE ε4 × CVRF was not statistically significant for both types of MCI. However, CVRF were associated with both types of MCI and the association remained statistically significant after adjustment by sex, age, and education level. The carrier status of the ApoE genotype does not contribute to this risk.
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16
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Fransquet PD, Lacaze P, Saffery R, Phung J, Parker E, Shah RC, Murray A, Woods RL, Ryan J. DNA methylation analysis of candidate genes associated with dementia in peripheral blood. Epigenomics 2020; 12:2109-2123. [PMID: 33300824 DOI: 10.2217/epi-2020-0236] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Aim: To investigate whether genes implicated in dementia pathogenesis are differently methylated in peripheral blood. Materials & methods: Participants included 160 cognitively healthy individuals aged 70+ years: 73 who were subsequently diagnosed with dementia and 87 controls matched on age, gender, education, smoking and baseline cognition. A total of 49 participants also provided blood samples at diagnosis. Blood DNA methylation of APOE, APP, BDNF, PIN1, SNCA and TOMM40 was examined. Results: A total of 56 of 299 probes were differentially methylated in dementia compared with controls and 39 probes prior to diagnosis. The greatest effect size was in APP (cg19423170, Δ-8.32%, adjusted p = 0.009 at diagnosis; cg19933173, Δ-4.18%, adjusted p < 0.0001 prediagnosis). Conclusion: Genes implicated in dementia pathogenesis show differential blood methylation in dementia, even prior to diagnosis.
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Affiliation(s)
- Peter D Fransquet
- School of Public Health & Preventive Medicine, Monash University, Melbourne, 3004 Victoria, Australia
| | - Paul Lacaze
- School of Public Health & Preventive Medicine, Monash University, Melbourne, 3004 Victoria, Australia
| | - Richard Saffery
- Murdoch Children's Research Institute & Department of Paediatrics, The University of Melbourne, Parkville, 3052 Victoria, Australia
| | - James Phung
- School of Public Health & Preventive Medicine, Monash University, Melbourne, 3004 Victoria, Australia
| | - Emily Parker
- School of Public Health & Preventive Medicine, Monash University, Melbourne, 3004 Victoria, Australia
| | - Raj C Shah
- Department of Family Medicine & Rush Alzheimer's Disease Center, Rush University Medical Center, Chicago, IL, USA
| | - Anne Murray
- Berman Center for Outcomes & Clinical Research, Hennepin Healthcare Research Institute, Hennepin Healthcare; Division of Geriatrics, Department of Medicine, University of Minnesota, Minneapolis, MN, USA
| | - Robyn L Woods
- School of Public Health & Preventive Medicine, Monash University, Melbourne, 3004 Victoria, Australia
| | - Joanne Ryan
- School of Public Health & Preventive Medicine, Monash University, Melbourne, 3004 Victoria, Australia.,PSNREC, University of Montpellier, INSERM, Montpellier, France
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17
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Mohammadpanah M, Heidari MM, Khatami M, Hadadzadeh M. Relationship of hypomethylation CpG islands in interleukin-6 gene promoter with IL-6 mRNA levels in patients with coronary atherosclerosis. J Cardiovasc Thorac Res 2020; 12:214-221. [PMID: 33123328 PMCID: PMC7581844 DOI: 10.34172/jcvtr.2020.37] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Accepted: 07/27/2020] [Indexed: 01/09/2023] Open
Abstract
Introduction: Atherosclerosis is the important cause of most cardiovascular diseases, with high prevalence and mortality. Atherosclerosis is not only a lipid metabolism disorder but also recently is defined as a chronic inflammatory disease. Several studies showed that interleukin-6 (IL-6) is involved in the pathogenesis of atherosclerosis. The aim of the present study is the examination of IL6 mRNA Levels and hypomethylation of IL6 promoter in atherosclerosis patients. Methods: In this assay, a total of 35 cases with atherosclerosis and 30 controls were enrolled. RNA and DNA were isolated from the peripheral blood of all samples. Mean IL6 gene expression was determined by RT-PCR and methylation status at six CpG motifs in IL6 promoter was determined using bisulfite genomic sequencing. Results: Real Time-PCR analysis results showed the mean IL6 RNA level in atherosclerosis patients candidate for CABG (coronary artery bypass grafting) was significantly higher than controls (P value = 0.01). Also, the upstream CpG motifs (-1038 to -952) in IL6 promoter were predominantly unmethylated in patients than in the controls (P value = 0.01). Conclusion: These findings suggest that an increase in IL-6 gene expression and its DNA hypomethylation promoter are associated with atherosclerosis patient's candidate for CABG surgery.
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Affiliation(s)
| | | | - Mehri Khatami
- Department of Biology, Faculty of Science, Yazd University, Yazd, Iran
| | - Mehdi Hadadzadeh
- Department of Cardiac Surgery, Afshar Hospital, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
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18
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Busch RM, Yehia L, Bazeley P, Seyfi M, Blümcke I, Hermann BP, Najm IM, Eng C. Verbal memory dysfunction is associated with alterations in brain transcriptome in dominant temporal lobe epilepsy. Epilepsia 2020; 61:2203-2213. [PMID: 32945555 DOI: 10.1111/epi.16673] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 08/08/2020] [Accepted: 08/09/2020] [Indexed: 12/15/2022]
Abstract
OBJECTIVE Memory dysfunction is prevalent in many neurological disorders and can have a significant negative impact on quality of life. The genetic contributions to memory impairment in epilepsy, particularly temporal lobe epilepsy (TLE), remain poorly understood. Here, we compare the brain transcriptome between TLE patients with and without verbal memory impairments to identify genes and signaling networks important for episodic memory. METHODS Brain tissues were resected from 23 adults who underwent dominant temporal lobectomy for treatment of pharmacoresistant epilepsy. To control for potential effects of APOE on memory, only those homozygous for the APOE ε3 allele were included. A battery of memory tests was performed, and patients were stratified into two groups based on preoperative memory performance. The groups were well matched on demographic and disease-related variables. Total RNA-Seq and small RNA-Seq were performed on RNA extracted from the brain tissues. Pathway and integrative analyses were subsequently performed. RESULTS We identified 1092 differentially expressed transcripts (DETs), with the majority (71%) being underexpressed in brain tissues from patients with impaired memory compared to those from patients with intact memory. Enrichment analysis revealed overrepresentation of genes in pathways pertaining to brain-related neurological dysfunction, including a subset associated with neurodegenerative diseases, memory, and cognition (APP, MAPT, PINK1). Despite including patients with identical APOE genotypes, we identify APOE as a differentially expressed gene associated with memory status. Small RNA-Seq identified four differentially expressed microRNAs (miRNAs) that were predicted to target a subset (22%) of all DETs. Integrative analysis showed that these miRNA-predicted DET targets impact brain-related pathways and biological processes also pertinent to memory and cognition. SIGNIFICANCE TLE-associated memory status may be influenced by differences in gene expression profiles within the temporal lobe. Upstream processes influencing differential expression signatures, such as miRNAs, could serve as biomarkers and potential treatment targets for memory impairment in TLE.
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Affiliation(s)
- Robyn M Busch
- Epilepsy Center and Department of Neurology, Neurological Institute, Cleveland Clinic, Cleveland, Ohio.,Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio
| | - Lamis Yehia
- Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio
| | - Peter Bazeley
- Department of Quantitative Health Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio
| | - Marilyn Seyfi
- Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio
| | - Ingmar Blümcke
- Epilepsy Center and Department of Neurology, Neurological Institute, Cleveland Clinic, Cleveland, Ohio.,Institute of Neuropathology, University Hospitals Erlangen, Erlangen, Germany
| | - Bruce P Hermann
- Department of Neurology, University of Wisconsin, Madison, Wisconsin
| | - Imad M Najm
- Epilepsy Center and Department of Neurology, Neurological Institute, Cleveland Clinic, Cleveland, Ohio
| | - Charis Eng
- Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio.,Taussig Cancer Institute, Cleveland Clinic, Cleveland, Ohio.,Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, Ohio
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19
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Kenney MC, Nashine S. Further understanding of epigenetic dysfunction of the retinal pigment epithelium in AMD. EXPERT REVIEW OF OPHTHALMOLOGY 2020; 15:221-231. [PMID: 33732291 DOI: 10.1080/17469899.2020.1767597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Introduction Modulation of epigenetic mechanisms that contribute to retinal development may render the eye susceptible to age-related macular degeneration (AMD). Progression of AMD involves alterations of epigenome such as CpG methylation and histone modifications, and study of the epigenetic regulation of molecular/ cellular pathways associated with AMD might identify target epigenetic markers for treatment of AMD. Areas covered In this review, we provide an overview of the influence of epigenetic factors on signaling pathways/ related genes associated with AMD, mainly hypoxia, angiogenesis, inflammation, complement, and oxidative stress; and discuss the critical role of microRNAs in AMD. Expert Opinion Better understanding of epigenetic-mediated and microRNA-mediated regulation of the AMD disease-related pathways would help to assess the risk of developing AMD besides providing valuable insight on potential target candidates for AMD therapy.
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Affiliation(s)
- Maria Cristina Kenney
- Department of Ophthalmology, Gavin Herbert Eye Institute, University of California Irvine, Irvine, CA, USA.,Department of Pathology and Laboratory Medicine, University of California Irvine, Irvine, CA, USA
| | - Sonali Nashine
- Department of Ophthalmology, Gavin Herbert Eye Institute, University of California Irvine, Irvine, CA, USA
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20
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Cacabelos R. Pharmacogenetic considerations when prescribing cholinesterase inhibitors for the treatment of Alzheimer's disease. Expert Opin Drug Metab Toxicol 2020; 16:673-701. [PMID: 32520597 DOI: 10.1080/17425255.2020.1779700] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
INTRODUCTION Cholinergic dysfunction, demonstrated in the late 1970s and early 1980s, led to the introduction of acetylcholinesterase inhibitors (AChEIs) in 1993 (Tacrine) to enhance cholinergic neurotransmission as the first line of treatment against Alzheimer's disease (AD). The new generation of AChEIs, represented by Donepezil (1996), Galantamine (2001) and Rivastigmine (2002), is the only treatment for AD to date, together with Memantine (2003). AChEIs are not devoid of side-effects and their cost-effectiveness is limited. An option to optimize the correct use of AChEIs is the implementation of pharmacogenetics (PGx) in the clinical practice. AREAS COVERED (i) The cholinergic system in AD, (ii) principles of AD PGx, (iii) PGx of Donepezil, Galantamine, Rivastigmine, Huperzine and other treatments, and (iv) practical recommendations. EXPERT OPINION The most relevant genes influencing AChEI efficacy and safety are APOE and CYPs. APOE-4 carriers are the worst responders to AChEIs. With the exception of Rivastigmine (UGT2B7, BCHE-K), the other AChEIs are primarily metabolized via CYP2D6, CYP3A4, and UGT enzymes, with involvement of ABC transporters and cholinergic genes (CHAT, ACHE, BCHE, SLC5A7, SLC18A3, CHRNA7) in most ethnic groups. Defective variants may affect the clinical response to AChEIs. PGx geno-phenotyping is highly recommended prior to treatment.
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Affiliation(s)
- Ramón Cacabelos
- Department of Genomic Medicine, EuroEspes Biomedical Research Center, International Center of Neuroscience and Genomic Medicine , Bergondo, Corunna, Spain
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21
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Wagner MA, Erickson KI, Bender CM, Conley YP. The Influence of Physical Activity and Epigenomics On Cognitive Function and Brain Health in Breast Cancer. Front Aging Neurosci 2020; 12:123. [PMID: 32457596 PMCID: PMC7225270 DOI: 10.3389/fnagi.2020.00123] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 04/14/2020] [Indexed: 12/17/2022] Open
Abstract
The risk of breast cancer increases with age, with the majority of women diagnosed with breast cancer being postmenopausal. It has been estimated that 25-75% of women with breast cancer experience changes in cognitive function (CF) related to disease and treatment, which compromises psychological well-being, decision making, ability to perform daily activities, and adherence to cancer therapy. Unfortunately, the mechanisms that underlie neurocognitive changes in women with breast cancer remain poorly understood, which in turn limits the development of effective treatments and prevention strategies. Exercise has great potential as a non-pharmaceutical intervention to mitigate the decline in CF in women with breast cancer. Evidence suggests that DNA methylation, an epigenetic mechanism for gene regulation, impacts CF and brain health (BH), that exercise influences DNA methylation, and that exercise impacts CF and BH. Although investigating DNA methylation has the potential to uncover the biologic foundations for understanding neurocognitive changes within the context of breast cancer and its treatment as well as the ability to understand how exercise mitigates these changes, there is a dearth of research on this topic. The purpose of this review article is to compile the research in these areas and to recommend potential areas of opportunity for investigation.
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Affiliation(s)
- Monica A. Wagner
- School of Nursing, University of Pittsburgh, Pittsburgh, PA, United States
| | - Kirk I. Erickson
- Department of Psychology, University of Pittsburgh, Pittsburgh, PA, United States
- Discipline of Exercise Science, College of Science, Health, Engineering and Education, Murdoch University, Perth Campus, Murdoch, WA, Australia
| | | | - Yvette P. Conley
- School of Nursing, University of Pittsburgh, Pittsburgh, PA, United States
- Department of Human Genetics, University of Pittsburgh, Pittsburgh, PA, United States
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22
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Mur J, McCartney DL, Walker RM, Campbell A, Bermingham ML, Morris SW, Porteous DJ, McIntosh AM, Deary IJ, Evans KL, Marioni RE. DNA methylation in APOE: The relationship with Alzheimer's and with cardiovascular health. ALZHEIMER'S & DEMENTIA (NEW YORK, N. Y.) 2020; 6:e12026. [PMID: 32346601 PMCID: PMC7185210 DOI: 10.1002/trc2.12026] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 12/16/2019] [Accepted: 01/01/2020] [Indexed: 12/31/2022]
Abstract
INTRODUCTION Genetic variation in the apolipoprotein E (APOE) gene is associated with Alzheimer's disease (AD) and risk factors for cardiovascular disease (CVD). DNA methylationat APOE has been associated with altered cognition and AD. It is unclear if epigenetic marks could be used for predicting future disease. METHODS We assessed blood-based DNA methylation at 13 CpGs in the APOE gene in 5828 participants from the Generation Scotland (GS) cohort. Using linear mixed models regression, we examined the relationships among APOE methylation, cognition, cholesterol, the family history of AD and the risk for CVD. RESULTS DNA methylation at two CpGs was associated with the ratio of total cholesterol and HDL cholesterol, but not with cognition, family history of AD, or the risk of CVD. DISCUSSION APOE methylation is associated with the levels of blood cholesterol, but there is no evidence for the utility of APOE methylation as a biomarker for predicting AD or CVD.
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Affiliation(s)
- Jure Mur
- Department of PsychologyUniversity of EdinburghEdinburghUK
- Centre for Genomic and Experimental MedicineInstitute of Genetics and Molecular MedicineUniversity of EdinburghEdinburghUK
| | - Daniel L. McCartney
- Centre for Genomic and Experimental MedicineInstitute of Genetics and Molecular MedicineUniversity of EdinburghEdinburghUK
| | - Rosie M. Walker
- Centre for Genomic and Experimental MedicineInstitute of Genetics and Molecular MedicineUniversity of EdinburghEdinburghUK
| | - Archie Campbell
- Centre for Genomic and Experimental MedicineInstitute of Genetics and Molecular MedicineUniversity of EdinburghEdinburghUK
| | - Mairead L. Bermingham
- Centre for Genomic and Experimental MedicineInstitute of Genetics and Molecular MedicineUniversity of EdinburghEdinburghUK
| | - Stewart W. Morris
- Centre for Genomic and Experimental MedicineInstitute of Genetics and Molecular MedicineUniversity of EdinburghEdinburghUK
| | - David J. Porteous
- Centre for Genomic and Experimental MedicineInstitute of Genetics and Molecular MedicineUniversity of EdinburghEdinburghUK
| | - Andrew M. McIntosh
- Centre for Genomic and Experimental MedicineInstitute of Genetics and Molecular MedicineUniversity of EdinburghEdinburghUK
- Division of PsychiatryCentre for Clinical Brain SciencesUniversity of EdinburghEdinburghUK
| | - Ian J. Deary
- Department of PsychologyUniversity of EdinburghEdinburghUK
| | - Kathryn L. Evans
- Centre for Genomic and Experimental MedicineInstitute of Genetics and Molecular MedicineUniversity of EdinburghEdinburghUK
| | - Riccardo E. Marioni
- Centre for Genomic and Experimental MedicineInstitute of Genetics and Molecular MedicineUniversity of EdinburghEdinburghUK
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23
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Blue EE, Horimoto ARVR, Mukherjee S, Wijsman EM, Thornton TA. Local ancestry at APOE modifies Alzheimer's disease risk in Caribbean Hispanics. Alzheimers Dement 2019; 15:1524-1532. [PMID: 31606368 PMCID: PMC6925639 DOI: 10.1016/j.jalz.2019.07.016] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 07/22/2019] [Accepted: 07/25/2019] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Although the relationship between APOE and Alzheimer's disease (AD) is well established in populations of European descent, the effects of APOE and ancestry on AD risk in diverse populations is not well understood. METHODS Logistic mixed model regression and survival analyses were performed in a sample of 3067 Caribbean Hispanics and 3028 individuals of European descent to assess the effects of APOE genotype, local ancestry, and genome-wide ancestry on AD risk and age at onset. RESULTS Among the Caribbean Hispanics, individuals with African-derived ancestry at APOE had 39% lower odds of AD than individuals with European-derived APOE, after adjusting for APOE genotype, age, and genome-wide ancestry. While APOE E2 and E4 effects on AD risk and age at onset were significant in the Caribbean Hispanics, they were substantially attenuated compared with those in European ancestry individuals. DISCUSSION These results suggest that additional genetic variation in the APOE region influences AD risk beyond APOE E2/E3/E4.
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Affiliation(s)
- Elizabeth E Blue
- Division of Medical Genetics, University of Washington, Seattle, WA, USA.
| | | | | | - Ellen M Wijsman
- Division of Medical Genetics, University of Washington, Seattle, WA, USA; Department of Biostatistics, University of Washington, Seattle, WA, USA; Department of Genome Sciences, University of Washington, Seattle, WA, USA
| | - Timothy A Thornton
- Department of Biostatistics, University of Washington, Seattle, WA, USA; Department of Statistics, University of Washington, Seattle, WA, USA.
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24
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Guo Y, Xu W, Li JQ, Ou YN, Shen XN, Huang YY, Dong Q, Tan L, Yu JT. Genome-wide association study of hippocampal atrophy rate in non-demented elders. Aging (Albany NY) 2019; 11:10468-10484. [PMID: 31760383 PMCID: PMC6914394 DOI: 10.18632/aging.102470] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 11/08/2019] [Indexed: 12/18/2022]
Abstract
Hippocampal atrophy rate has been correlated with cognitive decline and its genetic modifiers are still unclear. Here we firstly performed a genome-wide association study (GWAS) to identify genetic loci that regulate hippocampal atrophy rate. Six hundred and two non-Hispanic Caucasian elders without dementia were included from the Alzheimer's Disease Neuroimaging Initiative cohort. Three single nucleotide polymorphisms (SNPs) (rs4420638, rs56131196, rs157582) in the TOMM40-APOC1 region were associated with hippocampal atrophy rate at genome-wide significance and 3 additional SNPs (in TOMM40 and near MIR302F gene) reached a suggestive level of significance. Strong linkage disequilibrium between rs4420638 and rs56131196 was found. The minor allele of rs4420638 (G) and the minor allele of rs157582 (T) showed associations with lower Mini-mental State Examination score, higher Alzheimer Disease Assessment Scale-cognitive subscale 11 score and smaller entorhinal volume using both baseline and longitudinal measurements, as well as with accelerated cognitive decline. Moreover, rs56131196 (P = 1.96 × 10-454) and rs157582 (P = 9.70 × 10-434) were risk loci for Alzheimer's disease. Collectively, rs4420638, rs56131196 and rs157582 were found to be associated with hippocampal atrophy rate. Besides, they were also identified as genetic loci for cognitive decline.
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Affiliation(s)
- Yu Guo
- Department of Neurology, Qingdao Municipal Hospital Affiliated to Qingdao University, Qingdao, China
| | - Wei Xu
- Department of Neurology, Qingdao Municipal Hospital Affiliated to Qingdao University, Qingdao, China
| | - Jie-Qiong Li
- Department of Neurology, Qingdao Municipal Hospital Affiliated to Qingdao University, Qingdao, China
| | - Ya-Nan Ou
- Department of Neurology, Qingdao Municipal Hospital Affiliated to Qingdao University, Qingdao, China
| | - Xue-Ning Shen
- Department of Neurology and Institute of Neurology, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yu-Yuan Huang
- Department of Neurology and Institute of Neurology, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Qiang Dong
- Department of Neurology and Institute of Neurology, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Lan Tan
- Department of Neurology, Qingdao Municipal Hospital Affiliated to Qingdao University, Qingdao, China
| | - Jin-Tai Yu
- Department of Neurology and Institute of Neurology, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
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25
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Abstract
Dementia is an overarching term which describes a group of symptoms that result in long-term decline in cognitive functioning that is significant enough to affect daily function. It is caused by a number of different diseases, the most common of which is Alzheimer's disease. Currently, there are no definitive biomarkers for preclinical or diagnostic use, or which differentiate between underlying disease types. The purpose of this review is to highlight several important areas of research on blood-based biomarkers of dementia, with a specific focus on epigenetic biomarkers. A systematic search of the literature identified 77 studies that compared blood DNA methylation between individuals with dementia and controls and 45 studies that measured microRNA. Very few studies were identified that focused on histone modifications. There were many promising findings from studies in the field of blood-based epigenetic biomarkers of dementia, however, a lack of consistency in study design, technologies, and platforms used for the biomarker measurement, as well as statistical analysis methods, have hampered progress. To date, there are very few findings that have been independently replicated across more than one study, indicating a preponderance of false-positive findings and the field has likely been plagued by positive publication bias. Here, we highlight and discuss several of the limitations of existing studies and provide recommendations for how these could be overcome in future research. A robust framework should be followed to enable development of the most valid and reproducible biomarkers with the strongest clinical utility. Defining a series of biomarkers that may be complimentary to each other could permit a stronger multifactorial biomarker to be developed that would allow for not only accurate dementia diagnosis but preclinical detection.
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Affiliation(s)
- Peter D Fransquet
- Department of Epidemiology and Preventive Medicine, Monash University , Melbourne , Australia.,Disease Epigenetics, Murdoch Children's Research Institute , Parkville , Australia
| | - Joanne Ryan
- Department of Epidemiology and Preventive Medicine, Monash University , Melbourne , Australia.,Disease Epigenetics, Murdoch Children's Research Institute , Parkville , Australia
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26
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Mancera-Páez O, Estrada-Orozco K, Mahecha MF, Cruz F, Bonilla-Vargas K, Sandoval N, Guerrero E, Salcedo-Tacuma D, Melgarejo JD, Vega E, Ortega-Rojas J, Román GC, Pardo-Turriago R, Arboleda H. Differential Methylation in APOE (Chr19; Exon Four; from 44,909,188 to 44,909,373/hg38) and Increased Apolipoprotein E Plasma Levels in Subjects with Mild Cognitive Impairment. Int J Mol Sci 2019; 20:ijms20061394. [PMID: 30897703 PMCID: PMC6470812 DOI: 10.3390/ijms20061394] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 03/04/2019] [Accepted: 03/12/2019] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Biomarkers are essential for identification of individuals at high risk of mild cognitive impairment (MCI) for potential prevention of dementia. We investigated DNA methylation in the APOE gene and apolipoprotein E (ApoE) plasma levels as MCI biomarkers in Colombian subjects with MCI and controls. METHODS In total, 100 participants were included (71% women; average age, 70 years; range, 43⁻91 years). MCI was diagnosed by neuropsychological testing, medical and social history, activities of daily living, cognitive symptoms and neuroimaging. Using multivariate logistic regression models adjusted by age and gender, we examined the risk association of MCI with plasma ApoE and APOE methylation. RESULTS MCI was diagnosed in 41 subjects (average age, 66.5 ± 9.6 years) and compared with 59 controls. Elevated plasma ApoE and APOE methylation of CpGs 165, 190, and 198 were risk factors for MCI (p < 0.05). Higher CpG-227 methylation correlated with lower risk for MCI (p = 0.002). Only CpG-227 was significantly correlated with plasma ApoE levels (correlation coefficient = -0.665; p = 0.008). CONCLUSION Differential APOE methylation and increased plasma ApoE levels were correlated with MCI. These epigenetic patterns require confirmation in larger samples but could potentially be used as biomarkers to identify early stages of MCI.
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Affiliation(s)
- Oscar Mancera-Páez
- Department of Neurology, Faculty of Medicine, Universidad Nacional de Colombia, Bogotá ZC 57, Colombia.
- Neurosciences Research Group, Faculty of Medicine, Universidad Nacional de Colombia, Bogotá ZC 57, Colombia.
- Genetic Institute, Universidad Nacional de Colombia, Bogotá ZC 57, Colombia.
- David Cabello International Alzheimer Disease Scholarship Fund, Houston Methodist Hospital, Houston, TX 77030, USA.
| | - Kelly Estrada-Orozco
- Neurosciences Research Group, Faculty of Medicine, Universidad Nacional de Colombia, Bogotá ZC 57, Colombia.
- Center for Evidence to Implementation, Bogotá ZC 57, Colombia.
- Health Technologies and Politics Assessment Group, Clinical Research Institute, Faculty of Medicine, Universidad Nacional de Colombia, Bogotá ZC 57, Colombia.
| | | | - Francy Cruz
- Neurosciences Research Group, Faculty of Medicine, Universidad Nacional de Colombia, Bogotá ZC 57, Colombia.
- Genetic Institute, Universidad Nacional de Colombia, Bogotá ZC 57, Colombia.
- PhD Program in Clinical and Translational Science, Department of Translational Research and of New Surgical and Medical Technologies, University of Pisa, 56128 Pisa, Italy.
| | - Kely Bonilla-Vargas
- Neurosciences Research Group, Faculty of Medicine, Universidad Nacional de Colombia, Bogotá ZC 57, Colombia.
- Genetic Institute, Universidad Nacional de Colombia, Bogotá ZC 57, Colombia.
| | - Nicolás Sandoval
- Genetic Institute, Universidad Nacional de Colombia, Bogotá ZC 57, Colombia.
| | - Esneyder Guerrero
- Genetic Institute, Universidad Nacional de Colombia, Bogotá ZC 57, Colombia.
| | | | - Jesús D Melgarejo
- Genetic Institute, Universidad Nacional de Colombia, Bogotá ZC 57, Colombia.
- Laboratory of Neuroscience, University of Zulia, Maracaibo 4001, Venezuela.
| | - Edwin Vega
- Neurosciences Research Group, Faculty of Medicine, Universidad Nacional de Colombia, Bogotá ZC 57, Colombia.
| | - Jenny Ortega-Rojas
- Genetic Institute, Universidad Nacional de Colombia, Bogotá ZC 57, Colombia.
| | - Gustavo C Román
- Department of Neurology, Methodist Neurological Institute and the Institute for Academic Medicine Houston Methodist Research Institute, Houston Methodist Hospital, Houston, TX 77030, USA.
- Weill Cornell Medical College, Department of Neurology, Cornell University, New York, NY 10065, USA.
| | - Rodrigo Pardo-Turriago
- Department of Neurology, Faculty of Medicine, Universidad Nacional de Colombia, Bogotá ZC 57, Colombia.
- Neurosciences Research Group, Faculty of Medicine, Universidad Nacional de Colombia, Bogotá ZC 57, Colombia.
- Genetic Institute, Universidad Nacional de Colombia, Bogotá ZC 57, Colombia.
- Hospital Universitario Nacional de Colombia, Bogotá ZC 57, Colombia.
| | - Humberto Arboleda
- Neurosciences Research Group, Faculty of Medicine, Universidad Nacional de Colombia, Bogotá ZC 57, Colombia.
- Genetic Institute, Universidad Nacional de Colombia, Bogotá ZC 57, Colombia.
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The Genetic Variability of APOE in Different Human Populations and Its Implications for Longevity. Genes (Basel) 2019; 10:genes10030222. [PMID: 30884759 PMCID: PMC6471373 DOI: 10.3390/genes10030222] [Citation(s) in RCA: 85] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 03/01/2019] [Accepted: 03/12/2019] [Indexed: 12/11/2022] Open
Abstract
Human longevity is a complex phenotype resulting from the combinations of context-dependent gene-environment interactions that require analysis as a dynamic process in a cohesive ecological and evolutionary framework. Genome-wide association (GWAS) and whole-genome sequencing (WGS) studies on centenarians pointed toward the inclusion of the apolipoprotein E (APOE) polymorphisms ε2 and ε4, as implicated in the attainment of extreme longevity, which refers to their effect in age-related Alzheimer's disease (AD) and cardiovascular disease (CVD). In this case, the available literature on APOE and its involvement in longevity is described according to an anthropological and population genetics perspective. This aims to highlight the evolutionary history of this gene, how its participation in several biological pathways relates to human longevity, and which evolutionary dynamics may have shaped the distribution of APOE haplotypes across the globe. Its potential adaptive role will be described along with implications for the study of longevity in different human groups. This review also presents an updated overview of the worldwide distribution of APOE alleles based on modern day data from public databases and ancient DNA samples retrieved from literature in the attempt to understand the spatial and temporal frame in which present-day patterns of APOE variation evolved.
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28
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Ghaznavi H, Kiani AA, Soltanpour MS. Association study between DNA methylation and genetic variation of APOE gene with the risk of coronary artery disease. MOLECULAR BIOLOGY RESEARCH COMMUNICATIONS 2018; 7:173-179. [PMID: 30788380 PMCID: PMC6363939 DOI: 10.22099/mbrc.2018.30955.1352] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Coronary artery disease (CAD) is a common health problem with a high rate of disability and death. Dyslipidemia and altered metabolism of Apo-lipoproteins are involved in the CAD pathogenesis. The current study investigated two common polymorphisms (rs429358 and rs7412) and promoter DNA methylation status of APOE in the Iranian CAD patients and control subjects. Two hundred angiographically documented CAD patients and 200 control subjects were included in the study. The APOE polymorphism analysis was done by PCR-RFLP technique and DNA methylation status was evaluated by methylation specific PCR. The assay of lipid levels was conducted using standard colorimetric protocols. Results indicated that the frequency of ε3/ε4 and ε2/ε3 genotypes was significantly more common in CAD group compared with control group. Relative to wild type genotype (ε3/ε3), CAD patients with ε3/ε4 and ε2/ε3 genotypes displayed significantly higher concentration of total-cholesterol and LDL-cholesterol. The frequency of DNA methylation of APOE was similar between the two studied groups. However, the methylation frequency of APOE gene was significantly higher in triple stenotic vessels relative to single stenotic vessels (P=0.032). In conclusion The present study indicated that the rs429358 and rs7412 polymorphisms are significantly risk factors for development and severity of CAD. Also, APOE methylation status may be involved in the severity but not in the development of CAD.
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Affiliation(s)
- Habib Ghaznavi
- Department of Pharmacology, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Ali Asghar Kiani
- Department of Hematology and Blood Transfusion, School of Allied Medical Sciences, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Mohammad Soleiman Soltanpour
- Department of Medical Laboratory Sciences, School of Paramedical Sciences, Zanjan University of Medical Sciences, Zanjan, Iran
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