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Stipho F, Malek-Ahmadi M. Meta-Analysis of White Matter Hyperintensity Volume Differences Between APOE ε4 Carriers and Noncarriers. Alzheimer Dis Assoc Disord 2024; 38:208-212. [PMID: 38748617 DOI: 10.1097/wad.0000000000000620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Accepted: 04/07/2024] [Indexed: 05/31/2024]
Abstract
Several studies have suggested that white matter hyperintensity volume (WMHV) is increased among apolipoprotein E (APOE) ε4 carriers while others have reported contradictory findings. Although APOE ε4 carriage is associated with greater AD pathology, it remains unclear whether cerebrovascular damage is also associated with APOE ε4 carriage. The aim of this meta-analysis was to determine whether WMHV is associated with APOE ε4 carrier status. 12 studies that were included yielded a total sample size of 16,738 adult subjects (ε4 carrier n = 4,721; ε4 noncarrier n = 12,017). There were no significant differences in WMHV between ε4 carriers and noncarriers (Hedge's g = 0.07; 95% CI (-0.01 to 0.15), P = 0.09). Subgroup analysis of community-based studies (n = 8) indicated a small effect size where ε4 carriers had greater WMHV relative to noncarriers (Hedge's g = 0.09 95% CI (0.02 to 0.16), P = 0.008). Among clinic-based studies (n = 3) there was no significant difference in WMHV by APOE ε4 carrier status (Hedge's g = -0.09, 95% CI (-0.60 to 0.41), P = 0.70). Observed APOE ε4-associated WMHV differences may be context-dependent and may also be confounded by a lack of standardization for WMHV segmentation.
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Affiliation(s)
- Faissal Stipho
- University of Arizona College of Medicine-Tucson, Tucson, AZ
| | - Michael Malek-Ahmadi
- Banner Alzheimer's Institute
- Department of Biomedical Informatics, University of Arizona College of Medicine-Phoenix, Phoenix, AZ
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Honea RA, Hunt S, Lepping RJ, Vidoni ED, Morris JK, Watts A, Michaelis E, Burns JM, Swerdlow RH. Alzheimer's disease cortical morphological phenotypes are associated with TOMM40'523-APOE haplotypes. Neurobiol Aging 2023; 132:131-144. [PMID: 37804609 PMCID: PMC10763175 DOI: 10.1016/j.neurobiolaging.2023.09.001] [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: 03/10/2023] [Revised: 09/05/2023] [Accepted: 09/07/2023] [Indexed: 10/09/2023]
Abstract
Both the APOE ε4 and TOMM40 rs10524523 ("523") genes have been associated with risk for Alzheimer's disease (AD) and neuroimaging biomarkers of AD. No studies have investigated the relationship of TOMM40'523-APOE ε4 on the structural complexity of the brain in AD individuals. We quantified brain morphology and multiple cortical attributes in individuals with mild cognitive impairment (MCI) and AD, then tested whether APOE ε4 or TOMM40 poly-T genotypes were related to AD morphological biomarkers in cognitively unimpaired (CU) and MCI/AD individuals. We identified several AD-specific phenotypes in brain morphology and found that TOMM40 poly-T short alleles are associated with early, AD-specific brain morphological differences in healthy aging. We observed decreased cortical thickness, sulcal depth, and fractal dimension in CU individuals with the poly-T short alleles. Moreover, in MCI/AD participants, the APOE ε4 (TOMM40 L) individuals had a higher rate of gene-related morphological markers indicative of AD. Our data suggest that TOMM40'523 is associated with early brain structure variations in the precuneus, temporal, and limbic cortices.
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Affiliation(s)
- Robyn A Honea
- University of Kansas Alzheimer's Disease Center, University of Kansas School of Medicine, Kansas City, KS, USA; Department of Neurology, University of Kansas School of Medicine, Kansas City, KS, USA.
| | - Suzanne Hunt
- University of Kansas Alzheimer's Disease Center, University of Kansas School of Medicine, Kansas City, KS, USA
| | - Rebecca J Lepping
- University of Kansas Alzheimer's Disease Center, University of Kansas School of Medicine, Kansas City, KS, USA; Hoglund Biomedical Imaging Center, University of Kansas Medical Center, Kansas City, KS, USA; Department of Neurology, University of Kansas School of Medicine, Kansas City, KS, USA
| | - Eric D Vidoni
- University of Kansas Alzheimer's Disease Center, University of Kansas School of Medicine, Kansas City, KS, USA; Department of Neurology, University of Kansas School of Medicine, Kansas City, KS, USA
| | - Jill K Morris
- University of Kansas Alzheimer's Disease Center, University of Kansas School of Medicine, Kansas City, KS, USA; Department of Neurology, University of Kansas School of Medicine, Kansas City, KS, USA
| | - Amber Watts
- University of Kansas Alzheimer's Disease Center, University of Kansas School of Medicine, Kansas City, KS, USA; Department of Psychology, University of Kansas, Lawrence, KS, USA
| | - Elias Michaelis
- University of Kansas Alzheimer's Disease Center, University of Kansas School of Medicine, Kansas City, KS, USA; Department of Pharmacology and Toxicology, University of Kansas, Lawrence, KS, USA
| | - Jeffrey M Burns
- University of Kansas Alzheimer's Disease Center, University of Kansas School of Medicine, Kansas City, KS, USA; Department of Neurology, University of Kansas School of Medicine, Kansas City, KS, USA
| | - Russell H Swerdlow
- University of Kansas Alzheimer's Disease Center, University of Kansas School of Medicine, Kansas City, KS, USA; Department of Neurology, University of Kansas School of Medicine, Kansas City, KS, USA
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Vipin A, Kumar D, Soo SA, Zailan FZ, Leow YJ, Koh CL, Ng ASL, Ng KP, Kandiah N. APOE4 carrier status determines association between white matter disease and grey matter atrophy in early-stage dementia. Alzheimers Res Ther 2023; 15:103. [PMID: 37270543 DOI: 10.1186/s13195-023-01251-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Accepted: 05/29/2023] [Indexed: 06/05/2023]
Abstract
BACKGROUND White matter hyperintensities, a neuroimaging marker of small-vessel cerebrovascular disease and apolipoprotein ε4 (APOE4) allele, are important dementia risk factors. However, APOE4 as a key effect modifier in the relationship between white matter hyperintensities and grey matter volume needs further exploration. METHODS One hundred ninety-two early-stage dementia (including mild cognitive impairment and mild dementia) and 259 cognitively unimpaired participants from a neurocognitive research cohort with neuroimaging data, APOE genotyping, and neuropsychological assessments were studied. We investigated independent and interactive effects of white matter hyperintensities and APOE4 on whole-brain voxel-wise grey matter volume using voxel-based morphometry (uncorrected p < 0.001; minimum cluster size = 100 voxels). We further assessed interactive effects between APOE4 and white matter hyperintensities on global cognition, memory, and executive function in early-stage dementia and cognitively unimpaired participants. RESULTS Independent of APOE4 status, higher white matter hyperintensity load was associated with greater grey matter atrophy across frontal, parietal, temporal, and occipital lobes in cognitively unimpaired and early-stage dementia subjects. However, interaction analyses and independent sample analyses revealed that APOE4 non-carriers demonstrated greater white matter hyperintensity-associated grey matter atrophy compared to APOE4 carriers in both cognitively unimpaired and early-stage dementia groups. Additional confirmatory analyses among APOE4 non-carriers demonstrated that white matter hyperintensities resulted in widespread grey matter loss. Analyses of cognitive function demonstrated that higher white matter hyperintensity load was associated with worse global (Mini-Mental State Examination, Montreal Cognitive Assessment) and executive function (Color Trails 2) in APOE4 non-carriers compared to APOE4 carriers in early-stage dementia but not cognitively unimpaired participants. CONCLUSIONS The association between white matter hyperintensities and grey matter loss is more pronounced in APOE4 non-carriers than APOE4 carriers in the cognitively unimpaired and early-stage dementia stages. Furthermore, white matter hyperintensity presence results in poorer executive function in APOE4 non-carriers compared to APOE4 carriers. This finding may have significant impact on the design of clinical trials with disease modifying therapies.
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Grants
- MOE AcRF Tier 3 Award MOE2017-T3-1-002 Ministry of Education - Singapore
- MOE AcRF Tier 3 Award MOE2017-T3-1-002 Ministry of Education - Singapore
- MOE AcRF Tier 3 Award MOE2017-T3-1-002 Ministry of Education - Singapore
- MOE AcRF Tier 3 Award MOE2017-T3-1-002 Ministry of Education - Singapore
- MOE AcRF Tier 3 Award MOE2017-T3-1-002 Ministry of Education - Singapore
- MOE AcRF Tier 3 Award MOE2017-T3-1-002 Ministry of Education - Singapore
- NMRC/CIRG/1415/2015, NMRC/CSA/063/2014, MOH-CSAINV18nov-0007, NMRC/CIRG/14MAY025 National Medical Research Council
- NMRC/CIRG/1415/2015, NMRC/CSA/063/2014, MOH-CSAINV18nov-0007, NMRC/CIRG/14MAY025 National Medical Research Council
- NMRC/CIRG/1415/2015, NMRC/CSA/063/2014, MOH-CSAINV18nov-0007, NMRC/CIRG/14MAY025 National Medical Research Council
- NMRC/CIRG/1415/2015, NMRC/CSA/063/2014, MOH-CSAINV18nov-0007, NMRC/CIRG/14MAY025 National Medical Research Council
- NMRC/CIRG/1415/2015, NMRC/CSA/063/2014, MOH-CSAINV18nov-0007, NMRC/CIRG/14MAY025 National Medical Research Council
- NMRC/CIRG/1415/2015, NMRC/CSA/063/2014, MOH-CSAINV18nov-0007, NMRC/CIRG/14MAY025 National Medical Research Council
- Reference Number: 991016 National Neuroscience Institute-Health Research Endowment Fund (NNI-HREF), Singapore
- Reference Number: 991016 National Neuroscience Institute-Health Research Endowment Fund (NNI-HREF), Singapore
- Reference Number: 991016 National Neuroscience Institute-Health Research Endowment Fund (NNI-HREF), Singapore
- Reference Number: 991016 National Neuroscience Institute-Health Research Endowment Fund (NNI-HREF), Singapore
- Reference Number: 991016 National Neuroscience Institute-Health Research Endowment Fund (NNI-HREF), Singapore
- Reference Number: 991016 National Neuroscience Institute-Health Research Endowment Fund (NNI-HREF), Singapore
- Reference Number: 991016 National Neuroscience Institute-Health Research Endowment Fund (NNI-HREF), Singapore
- Reference Number: 991016 National Neuroscience Institute-Health Research Endowment Fund (NNI-HREF), Singapore
- Reference Number: 991016 National Neuroscience Institute-Health Research Endowment Fund (NNI-HREF), Singapore
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Affiliation(s)
- Ashwati Vipin
- Dementia Research Centre - Lee Kong Chian School of Medicine, Nanyang Technology University, 11 Mandalay Road, Singapore, 308232, Singapore
- National Neuroscience Institute, Singapore, Singapore
| | - Dilip Kumar
- Dementia Research Centre - Lee Kong Chian School of Medicine, Nanyang Technology University, 11 Mandalay Road, Singapore, 308232, Singapore
- National Neuroscience Institute, Singapore, Singapore
| | - See Ann Soo
- Dementia Research Centre - Lee Kong Chian School of Medicine, Nanyang Technology University, 11 Mandalay Road, Singapore, 308232, Singapore
- National Neuroscience Institute, Singapore, Singapore
| | - Fatin Zahra Zailan
- Dementia Research Centre - Lee Kong Chian School of Medicine, Nanyang Technology University, 11 Mandalay Road, Singapore, 308232, Singapore
- National Neuroscience Institute, Singapore, Singapore
| | - Yi Jin Leow
- Dementia Research Centre - Lee Kong Chian School of Medicine, Nanyang Technology University, 11 Mandalay Road, Singapore, 308232, Singapore
- National Neuroscience Institute, Singapore, Singapore
| | - Chen Ling Koh
- National Neuroscience Institute, Singapore, Singapore
| | - Adeline Su Lyn Ng
- National Neuroscience Institute, Singapore, Singapore
- Duke-NUS Medical School, Singapore, Singapore
| | - Kok Pin Ng
- Dementia Research Centre - Lee Kong Chian School of Medicine, Nanyang Technology University, 11 Mandalay Road, Singapore, 308232, Singapore
- National Neuroscience Institute, Singapore, Singapore
- Duke-NUS Medical School, Singapore, Singapore
| | - Nagaendran Kandiah
- Dementia Research Centre - Lee Kong Chian School of Medicine, Nanyang Technology University, 11 Mandalay Road, Singapore, 308232, Singapore.
- National Neuroscience Institute, Singapore, Singapore.
- Duke-NUS Medical School, Singapore, Singapore.
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Raber J, Silbert LC. Role of white matter hyperintensity in effects of apolipoprotein E on cognitive injury. Front Hum Neurosci 2023; 17:1176690. [PMID: 37275347 PMCID: PMC10237322 DOI: 10.3389/fnhum.2023.1176690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 04/28/2023] [Indexed: 06/07/2023] Open
Abstract
Magnetic Resonance Imaging (MRI) T2-weighted white matter hyperintensity (WMH) is a marker of small vessel cerebrovascular pathology and is of ischemic origin. The prevalence and severity of WMH is associated with cardiovascular risk factors, aging, and cognitive injury in mild cognitive impairment (MCI), vascular dementia, and Alzheimer's disease (AD). WMH especially affects executive function, with additional effects on memory and global cognition. Apolipoprotein E (apoE) plays a role in cholesterol metabolism and neuronal repair after injury. Human and animal studies support a role for apoE in maintaining white matter integrity. In humans, there are three major human apoE isoforms, E2, E3, and E4. Human apoE isoforms differ in risk to develop AD and in association with WMH. In this Mini Review, we propose an increased focus on the role of WMH in cognitive health and cognitive injury and the likely role of apoE and apoE isoform in modulating these effects. We hypothesize that apoE and apoE isoforms play a role in modulating WMH via apoE isoform-dependent effects on oxylipins and 7-ketocholesterol, as well as amyloid related vascular injury, as seen in cerebral amyloid angiopathy.
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Affiliation(s)
- Jacob Raber
- Departments of Behavioral Neuroscience, Neurology, and Radiation Medicine, Division of Neuroscience, ONPRC, Oregon Health & Science University, Portland, OR, United States
| | - Lisa C. Silbert
- Department of Neurology, Oregon Alzheimer’s Disease Research Center, Oregon Health & Science University, Portland, OR, United States
- Department of Neurology, Veterans Affairs Portland Health Care System, Portland, OR, United States
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Association between APOE e4 and white matter hyperintensity volume, but not total brain volume or white matter integrity. Brain Imaging Behav 2021; 14:1468-1476. [PMID: 30903549 PMCID: PMC7572345 DOI: 10.1007/s11682-019-00069-9] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Apolipoprotein (APOE) e4 genotype is an accepted risk factor for accelerated cognitive aging and dementia, though its neurostructural substrates are unclear. The deleterious effects of this genotype on brain structure may increase in magnitude into older age. This study aimed to investigate in UK Biobank the association between APOE e4 allele presence vs. absence and brain imaging variables that have been associated with worse cognitive abilities; and whether this association varies by cross-sectional age. We used brain magnetic resonance imaging (MRI) and genetic data from a general-population cohort: the UK Biobank (N = 8395 after exclusions). We adjusted for the covariates of age in years, sex, Townsend social deprivation scores, smoking history and cardiometabolic diseases. There was a statistically significant association between APOE e4 genotype and increased (i.e. worse) white matter (WM) hyperintensity volumes (standardised beta = 0.088, 95% confidence intervals = 0.036 to 0.139, P = 0.001), a marker of poorer cerebrovascular health. There were no associations with left or right hippocampal, total grey matter (GM) or WM volumes, or WM tract integrity indexed by fractional anisotropy (FA) and mean diffusivity (MD). There were no statistically significant interactions with age. Future research in UK Biobank utilising intermediate phenotypes and longitudinal imaging hold significant promise for this area, particularly pertaining to APOE e4’s potential link with cerebrovascular contributions to cognitive aging.
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Qu Y, Tan CC, Shen XN, Li HQ, Cui M, Tan L, Dong Q, Yu JT. Association of Plasma Neurofilament Light With Small Vessel Disease Burden in Nondemented Elderly: A Longitudinal Study. Stroke 2021; 52:896-904. [PMID: 33517704 DOI: 10.1161/strokeaha.120.030302] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND AND PURPOSE Neurofilament light chain (NfL) is a promising predictive biomarker of active axonal injury and neuronal degeneration diseases. We aimed to evaluate if an increase in plasma NfL levels could play a monitoring role in the progression of cerebral small vessel disease (CSVD) among the nondemented elders, which are highly prevalent in elderly individuals and associated with an increased risk of stroke and dementia. METHODS The study included 496 nondemented participants from the Alzheimer disease neuroimaging initiative database. All participants underwent plasma NfL measurements and 3.0-Tesla magnetic resonance imaging of the brain; 387 (78.0%) underwent longitudinal measurements. The number of cerebral microbleeds, lacunar infarcts, and volumetric white matter hyperintensities, as well as Fazekas scores, were measured. Cross-sectional and longitudinal associations between CSVD burden and NfL levels were evaluated using multivariable-adjusted models. RESULTS Plasma NfL was higher in the moderate-severe CSVD burden group (45.2±16.0 pg/mL) than in the nonburden group (34.3±15.1 pg/mL; odds ratio [OR]=1.71 [95% CI, 1.24-2.35]) at baseline. NfL was positively associated with the presence of cerebral microbleeds (OR=1.29 [95% CI, 1.01-1.64]), lacunar infarcts (OR=1.43 [95% CI, 1.06-1.93]), and moderate-severe white matter hyperintensities (OR=1.67 [95% CI, 1.24-2.25]). Longitudinally, a higher change rate of NfL could predict more progression of CSVD burden (OR=1.38 [95% CI, 1.08-1.76]), white matter hyperintensities (OR=1.41 [95% CI, 1.10-1.79]), and lacunar infarcts (OR=1.99 [95% CI, 1.42-2.77]). CONCLUSIONS Plasma NfL level is a valuable noninvasive biomarker that supplements magnetic resonance imaging scans and possibly reflects the severity of CSVD burden. Furthermore, high plasma NfL levels tend to represent an increased CSVD risk, and dynamic increases in NfL levels might predict a greater progression of CSVD.
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Affiliation(s)
- Yi Qu
- Department of Neurology, Qingdao Municipal Hospital, Qingdao University, China (Y.Q., C.-C.T., L.T.)
| | - Chen-Chen Tan
- Department of Neurology, Qingdao Municipal Hospital, Qingdao University, China (Y.Q., C.-C.T., L.T.)
| | - Xue-Ning Shen
- Department of Neurology and Institute of Neurology, Huashan Hospital, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Shanghai Medical College, Fudan University, China (X.-N.S., H.-Q.L., M.C., Q.D., J.-T.Y.)
| | - Hong-Qi Li
- Department of Neurology and Institute of Neurology, Huashan Hospital, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Shanghai Medical College, Fudan University, China (X.-N.S., H.-Q.L., M.C., Q.D., J.-T.Y.)
| | - Mei Cui
- Department of Neurology and Institute of Neurology, Huashan Hospital, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Shanghai Medical College, Fudan University, China (X.-N.S., H.-Q.L., M.C., Q.D., J.-T.Y.)
| | - Lan Tan
- Department of Neurology, Qingdao Municipal Hospital, Qingdao University, China (Y.Q., C.-C.T., L.T.)
| | - Qiang Dong
- Department of Neurology and Institute of Neurology, Huashan Hospital, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Shanghai Medical College, Fudan University, China (X.-N.S., H.-Q.L., M.C., Q.D., J.-T.Y.)
| | - Jin-Tai Yu
- Department of Neurology and Institute of Neurology, Huashan Hospital, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Shanghai Medical College, Fudan University, China (X.-N.S., H.-Q.L., M.C., Q.D., J.-T.Y.)
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Genome-Wide Association Study of Cerebral Microbleeds on MRI. Neurotox Res 2019; 37:146-155. [PMID: 31209788 DOI: 10.1007/s12640-019-00073-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 05/29/2019] [Accepted: 06/07/2019] [Indexed: 10/26/2022]
Abstract
Cerebral microbleeds are the presence of a group of pathological processes affecting the small arteries, arterioles, capillaries, and venules of the brain. Previous studies showed that cerebral microbleeds were associated with higher risk of dementia and stroke. We conducted a genome-wide association study of cerebral microbleeds to identify novel loci associated with the presence and progression of cerebral microbleeds. This study included 454 individuals composed by 176 subjects with cerebral microbleeds and 278 subjects without cerebral microbleeds in a non-Hispanic/Latino white population. Association of genetic variants with the presence and progression of cerebral microbleeds was assessed by logistic regression model. Potential genetic risk variants Apolipoprotein E (ApoE) polymorphisms were independently genotyped and checked the association with the presence and progression of cerebral microbleeds. No single-nucleotide polymorphisms (SNPs) associated with the presence or progression of cerebral microbleeds were identified at genome-wide significant level (P < 1 × 10-8). A total of 19 SNPs were associated with the presence of microbleeds at suggestive level (P < 1 × 10-5). One SNP was associated with lower progression risk for cerebral microbleeds with suggestive evidence (P < 1 × 10-5). ApoE ε4ε4 was independently associated with the presence and progression of cerebral microbleeds (odds ratio = 2.54, 95% confidence interval 1.08-6.00 and odds ratio = 5.1, 95% confidence interval 1.36-19.16). We highlighted 19 novel SNPs associated with the presence of cerebral microbleeds and one novel SNP associated with the progression of cerebral microbleeds for the first time. ApoE ε4ε4 was confirmed independently associated with the presence and progression of cerebral microbleeds.
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Frey BM, Petersen M, Mayer C, Schulz M, Cheng B, Thomalla G. Characterization of White Matter Hyperintensities in Large-Scale MRI-Studies. Front Neurol 2019; 10:238. [PMID: 30972001 PMCID: PMC6443932 DOI: 10.3389/fneur.2019.00238] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 02/22/2019] [Indexed: 01/18/2023] Open
Abstract
Background: White matter hyperintensities of presumed vascular origin (WMH) are a common finding in elderly people and a growing social malady in the aging western societies. As a manifestation of cerebral small vessel disease, WMH are considered to be a vascular contributor to various sequelae such as cognitive decline, dementia, depression, stroke as well as gait and balance problems. While pathophysiology and therapeutical options remain unclear, large-scale studies have improved the understanding of WMH, particularly by quantitative assessment of WMH. In this review, we aimed to provide an overview of the characteristics, research subjects and segmentation techniques of these studies. Methods: We performed a systematic review according to the PRISMA statement. One thousand one hundred and ninety-six potentially relevant articles were identified via PubMed search. Six further articles classified as relevant were added manually. After applying a catalog of exclusion criteria, remaining articles were read full-text and the following information was extracted into a standardized form: year of publication, sample size, mean age of subjects in the study, the cohort included, and segmentation details like the definition of WMH, the segmentation method, reference to methods papers as well as validation measurements. Results: Our search resulted in the inclusion and full-text review of 137 articles. One hundred and thirty-four of them belonged to 37 prospective cohort studies. Median sample size was 1,030 with no increase over the covered years. Eighty studies investigated in the association of WMH and risk factors. Most of them focussed on arterial hypertension, diabetes mellitus type II and Apo E genotype and inflammatory markers. Sixty-three studies analyzed the association of WMH and secondary conditions like cognitive decline, mood disorder and brain atrophy. Studies applied various methods based on manual (3), semi-automated (57), and automated segmentation techniques (75). Only 18% of the articles referred to an explicit definition of WMH. Discussion: The review yielded a large number of studies engaged in WMH research. A remarkable variety of segmentation techniques was applied, and only a minority referred to a clear definition of WMH. Most addressed topics were risk factors and secondary clinical conditions. In conclusion, WMH research is a vivid field with a need for further standardization regarding definitions and used methods.
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Affiliation(s)
- Benedikt M Frey
- Department of Neurology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Marvin Petersen
- Department of Neurology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Carola Mayer
- Department of Neurology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Maximilian Schulz
- Department of Neurology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Bastian Cheng
- Department of Neurology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Götz Thomalla
- Department of Neurology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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9
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Salvadó G, Brugulat-Serrat A, Sudre CH, Grau-Rivera O, Suárez-Calvet M, Falcon C, Fauria K, Cardoso MJ, Barkhof F, Molinuevo JL, Gispert JD. Spatial patterns of white matter hyperintensities associated with Alzheimer's disease risk factors in a cognitively healthy middle-aged cohort. ALZHEIMERS RESEARCH & THERAPY 2019; 11:12. [PMID: 30678723 PMCID: PMC6346579 DOI: 10.1186/s13195-018-0460-1] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 12/18/2018] [Indexed: 11/17/2022]
Abstract
Background White matter hyperintensities (WMH) of presumed vascular origin have been associated with an increased risk of Alzheimer’s disease (AD). This study aims to describe the patterns of WMH associated with dementia risk estimates and individual risk factors in a cohort of middle-aged/late middle-aged individuals (mean 58 (interquartile range 51–64) years old). Methods Magnetic resonance imaging and AD risk factors were collected from 575 cognitively unimpaired participants. WMH load was automatically calculated in each brain lobe and in four equidistant layers from the ventricular surface to the cortical interface. Global volumes and regional patterns of WMH load were analyzed as a function of the Cardiovascular Risk Factors, Aging and Incidence of Dementia (CAIDE) dementia risk score, as well as family history of AD and Apolipoprotein E (APOE) genotype. Additional analyses were performed after correcting for the effect of age and hypertension. Results The studied cohort showed very low WMH burden (median 1.94 cm3) and 20-year dementia risk estimates (median 1.47 %). Even so, higher CAIDE scores were significantly associated with increased global WMH load. The main drivers of this association were age and hypertension, with hypercholesterolemia and body mass index also displaying a minor, albeit significant, influence. Regionally, CAIDE scores were positively associated with WMH in anterior areas, mostly in the frontal lobe. Age and hypertension showed significant association with WMH in almost all regions analyzed. The APOE-ε2 allele showed a protective effect over global WMH with a pattern that comprised juxtacortical temporo-occipital and fronto-parietal deep white matter regions. Participants with maternal family history of AD had higher WMH load than those without, especially in temporal and occipital lobes. Conclusions WMH load is associated with AD risk factors even in cognitively unimpaired subjects with very low WMH burden and dementia risk estimates. Our results suggest that tight control of modifiable risk factors in middle-age/late middle-age could have a significant impact on late-life dementia. Electronic supplementary material The online version of this article (10.1186/s13195-018-0460-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Gemma Salvadó
- Barcelonaβeta Brain Research Center, Pasqual Maragall Foundation, Wellington 30, 08005, Barcelona, Spain
| | - Anna Brugulat-Serrat
- Barcelonaβeta Brain Research Center, Pasqual Maragall Foundation, Wellington 30, 08005, Barcelona, Spain
| | - Carole H Sudre
- Engineering and Imaging Sciences, King's College London, London, UK.,Dementia Research Centre, University College London, London, UK.,Centre for Medical Imaging Computing, Faculty of Engineering, University College London, London, UK
| | - Oriol Grau-Rivera
- Barcelonaβeta Brain Research Center, Pasqual Maragall Foundation, Wellington 30, 08005, Barcelona, Spain
| | - Marc Suárez-Calvet
- Barcelonaβeta Brain Research Center, Pasqual Maragall Foundation, Wellington 30, 08005, Barcelona, Spain
| | - Carles Falcon
- Barcelonaβeta Brain Research Center, Pasqual Maragall Foundation, Wellington 30, 08005, Barcelona, Spain.,Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Madrid, Spain
| | - Karine Fauria
- Barcelonaβeta Brain Research Center, Pasqual Maragall Foundation, Wellington 30, 08005, Barcelona, Spain.,Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBERFES), Madrid, Spain
| | - M Jorge Cardoso
- Engineering and Imaging Sciences, King's College London, London, UK.,Dementia Research Centre, University College London, London, UK
| | - Frederik Barkhof
- Centre for Medical Imaging Computing, Faculty of Engineering, University College London, London, UK.,Brain Repair and Rehabilitation, University College London, London, UK.,Radiology & Nuclear Medicine, VU University Medical Centre, Amsterdam, Netherlands
| | - José Luis Molinuevo
- Barcelonaβeta Brain Research Center, Pasqual Maragall Foundation, Wellington 30, 08005, Barcelona, Spain. .,Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBERFES), Madrid, Spain.
| | - Juan Domingo Gispert
- Barcelonaβeta Brain Research Center, Pasqual Maragall Foundation, Wellington 30, 08005, Barcelona, Spain. .,Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Madrid, Spain. .,Universitat Pompeu Fabra, Barcelona, Spain.
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10
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Rojas S, Brugulat-Serrat A, Bargalló N, Minguillón C, Tucholka A, Falcon C, Carvalho A, Morán S, Esteller M, Gramunt N, Fauria K, Camí J, Molinuevo JL, Gispert JD. Higher prevalence of cerebral white matter hyperintensities in homozygous APOE-ɛ4 allele carriers aged 45-75: Results from the ALFA study. J Cereb Blood Flow Metab 2018; 38:250-261. [PMID: 28492093 PMCID: PMC5951016 DOI: 10.1177/0271678x17707397] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Cerebral white matter hyperintensities are believed the consequence of small vessel disease and are associated with risk and progression of Alzheimer's disease. The ɛ4 allele of the APOE gene is the major factor accountable for Alzheimer's disease heritability. However, the relationship between white matter hyperintensities and APOE genotype in healthy subjects remains controversial. We investigated the association between APOE-ɛ4 and vascular risk factors with white matter hyperintensities, and explored their interactions, in a cohort of cognitively healthy adults (45-75 years). White matter hyperintensities were assessed with the Fazekas Scale from magnetic resonance images (575 participants: 74 APOE-ɛ4 homozygotes, 220 heterozygotes and 281 noncarriers) and classified into normal (Fazekas < 2) and pathological (≥2). Stepwise logistic regression was used to study the association between pathological Fazekas and APOE genotype after correcting for cardiovascular and sociodemographic factors. APOE-ɛ4 homozygotes, but not heterozygotes, bear a significantly higher risk (OR 3.432; 95% CI [1.297-9.082]; p = 0.013) of displaying pathological white matter hyperintensities. As expected, aging, hypertension and cardiovascular and dementia risk scales were also positively associated to pathological white matter hyperintensities, but these did not modulate the effect of APOE-ɛ4/ɛ4. In subjects at genetic risk of developing Alzheimer's disease, the control of modifiable risk factors of white matter hyperintensities is of particular relevance to reduce or delay dementia's onset.
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Affiliation(s)
- Santiago Rojas
- 1 Barcelonaβeta Brain Research Center, Pasqual Maragall Foundation, Barcelona, Spain.,2 Faculty of Medicine, Department of Morphological Sciences, Unit of Human Anatomy and Embryology, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain
| | - Anna Brugulat-Serrat
- 1 Barcelonaβeta Brain Research Center, Pasqual Maragall Foundation, Barcelona, Spain
| | - Nuria Bargalló
- 3 Magnetic Resonance Imaging Core Facility, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain.,4 Centre Mèdic Diagnòstic Alomar, Barcelona, Spain
| | - Carolina Minguillón
- 1 Barcelonaβeta Brain Research Center, Pasqual Maragall Foundation, Barcelona, Spain
| | - Alan Tucholka
- 1 Barcelonaβeta Brain Research Center, Pasqual Maragall Foundation, Barcelona, Spain
| | - Carles Falcon
- 1 Barcelonaβeta Brain Research Center, Pasqual Maragall Foundation, Barcelona, Spain.,5 Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Zaragoza, Spain
| | - Andreia Carvalho
- 1 Barcelonaβeta Brain Research Center, Pasqual Maragall Foundation, Barcelona, Spain.,6 MRC Center for Developmental Neurobiology, King's College London, London, UK
| | - Sebastian Morán
- 7 Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research Institute (IDIBELL), Barcelona, Spain
| | - Manel Esteller
- 7 Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Research Institute (IDIBELL), Barcelona, Spain.,8 Department of Physiological Sciences II, School of Medicine, University of Barcelona (UB), Barcelona, Spain.,9 Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
| | - Nina Gramunt
- 1 Barcelonaβeta Brain Research Center, Pasqual Maragall Foundation, Barcelona, Spain
| | - Karine Fauria
- 1 Barcelonaβeta Brain Research Center, Pasqual Maragall Foundation, Barcelona, Spain
| | - Jordi Camí
- 1 Barcelonaβeta Brain Research Center, Pasqual Maragall Foundation, Barcelona, Spain.,10 Universitat Pompeu Fabra, Barcelona, Spain
| | - José L Molinuevo
- 1 Barcelonaβeta Brain Research Center, Pasqual Maragall Foundation, Barcelona, Spain.,11 Alzheimer's Disease and Other Cognitive Disorders Unit, Hospital Clínic, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Juan D Gispert
- 1 Barcelonaβeta Brain Research Center, Pasqual Maragall Foundation, Barcelona, Spain.,5 Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Zaragoza, Spain.,10 Universitat Pompeu Fabra, Barcelona, Spain
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11
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Luo X, Jiaerken Y, Yu X, Huang P, Qiu T, Jia Y, Li K, Xu X, Shen Z, Guan X, Zhou J, Zhang M. Associations between APOE genotype and cerebral small-vessel disease: a longitudinal study. Oncotarget 2017; 8:44477-44489. [PMID: 28574812 PMCID: PMC5546495 DOI: 10.18632/oncotarget.17724] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Accepted: 04/07/2017] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVE It remains unclear if and how the interactions between APOE genotypes and cerebral small-vessel diseases (CSVD) lead to cognitive decline in the long term. Based on ADNI cohort, this longitudinal study aimed to clarify the potential relationship among APOE genotype, CSVD and cognition by integrating multi-level data. METHOD There were 135 healthy elderly (including ε2, ε4 allele carriers and ε3 homozygotes) who had completed two years' follow-up. MRI markers of CSVD, including white matter hyperintensities (WMH), dilated perivascular space (dPVS), microbleeds and lacune, were assessed. Besides, neuropathological factors including Alzheimer's disease-related pathology measured by CSF and PiB-PET were assessed. Repeated measurements ANOVAs were performed to test impact of different APOE genotypes on CSVD. RESULTS We found that APOE ε4 carriers had significantly more frontal WMH burden and basal ganglia dPVS at baseline and faster progression of frontal WMH burden during follow-up. Furthermore, our results showed that APOE ε4 carriers had significantly decreased Aβ1-42 level, and its level was negatively related with baseline and progressive total WMH burden. Then, general linear modals indicated interaction between basal frontal WMH burden and ε4 allele was related with declining trend of cognition. CONCLUSION Our findings suggested APOE ε4 allele was associated with increased Aβ deposition, which may lead to the formation and progression of WMH, especially in frontal lobe. Besides, interaction between the increased frontal WMH burden and ε4 allele can exert long-term detrimental effects on individual's trajectory of cognition.
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Affiliation(s)
- Xiao Luo
- Department of Radiology, The Second Affiliated Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Yerfan Jiaerken
- Department of Radiology, The Second Affiliated Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Xinfeng Yu
- Department of Radiology, The Second Affiliated Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Peiyu Huang
- Department of Radiology, The Second Affiliated Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Tiantian Qiu
- Department of Radiology, The Second Affiliated Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Yunlu Jia
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Kaicheng Li
- Department of Radiology, The Second Affiliated Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Xiaojun Xu
- Department of Radiology, The Second Affiliated Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Zhujing Shen
- Department of Radiology, The Second Affiliated Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Xiaojun Guan
- Department of Radiology, The Second Affiliated Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Jiong Zhou
- Department of Neurology, The Second Affiliated Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Minming Zhang
- Department of Radiology, The Second Affiliated Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
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12
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Roseborough A, Ramirez J, Black SE, Edwards JD. Associations between amyloid β and white matter hyperintensities: A systematic review. Alzheimers Dement 2017; 13:1154-1167. [PMID: 28322203 DOI: 10.1016/j.jalz.2017.01.026] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 01/27/2017] [Accepted: 01/30/2017] [Indexed: 11/25/2022]
Abstract
INTRODUCTION This systematic review synthesizes current evidence for associations between cortical amyloid β, visualized on amyloid positron emission tomography imaging, and white matter hyperintensity (WMH) burden on magnetic resonance imaging in healthy elderly adults and individuals with cognitive impairment and dementia. METHODS Following Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) systematic review guidelines, we systematically searched MEDLINE, Embase, Cochrane, and PsycINFO databases from January 2000 to September 2015. RESULTS Our search returned 492 articles, 34 of which met criteria for inclusion in the final selection. Most studies reported no significant relationships between amyloid β and WMH burden across diagnostic groups. DISCUSSION Findings of this systematic review suggest that amyloid accumulation and WMH are independent but additive processes. The limited number of independent cohorts, lack of longitudinal data, and exclusion of individuals with mixed dementia limit the generalizability of these findings. Further studies are required to elucidate the putative contributions of vascular processes to neurodegenerative pathology.
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Affiliation(s)
- Austyn Roseborough
- LC Campbell Cognitive Neurology Research Unit, Hurvitz Brain Sciences Program, Sunnybrook Research Institute, Toronto, Ontario, Canada
| | - Joel Ramirez
- LC Campbell Cognitive Neurology Research Unit, Hurvitz Brain Sciences Program, Sunnybrook Research Institute, Toronto, Ontario, Canada; Heart & Stroke Foundation Canadian Partnership for Stroke Recovery, Toronto, Ontario, Canada
| | - Sandra E Black
- LC Campbell Cognitive Neurology Research Unit, Hurvitz Brain Sciences Program, Sunnybrook Research Institute, Toronto, Ontario, Canada; Heart & Stroke Foundation Canadian Partnership for Stroke Recovery, Toronto, Ontario, Canada; Department of Medicine, Neurology, University of Toronto and Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada
| | - Jodi D Edwards
- LC Campbell Cognitive Neurology Research Unit, Hurvitz Brain Sciences Program, Sunnybrook Research Institute, Toronto, Ontario, Canada; Heart & Stroke Foundation Canadian Partnership for Stroke Recovery, Toronto, Ontario, Canada.
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13
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Tai LM, Thomas R, Marottoli FM, Koster KP, Kanekiyo T, Morris AWJ, Bu G. The role of APOE in cerebrovascular dysfunction. Acta Neuropathol 2016; 131:709-23. [PMID: 26884068 DOI: 10.1007/s00401-016-1547-z] [Citation(s) in RCA: 135] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 02/10/2016] [Accepted: 02/10/2016] [Indexed: 11/30/2022]
Abstract
The ε4 allele of the apolipoprotein E gene (APOE4) is associated with cognitive decline during aging, is the greatest genetic risk factor for Alzheimer's disease and has links to other neurodegenerative conditions that affect cognition. Increasing evidence indicates that APOE genotypes differentially modulate the function of the cerebrovasculature (CV), with apoE and its receptors expressed by different cell types at the CV interface (astrocytes, pericytes, smooth muscle cells, brain endothelial cells). However, research on the role of apoE in CV dysfunction has not advanced as quickly as other apoE-modulated pathways. This review will assess what aspects of the CV are modulated by APOE genotypes during aging and under disease states, discuss potential mechanisms, and summarize the therapeutic significance of the topic. We propose that APOE4 induces CV dysfunction through direct signaling at the CV, and indirectly via modulation of peripheral and central pathways. Further, that APOE4 predisposes the CV to damage by, and exacerbates the effects of, additional risk factors (such as sex, hypertension, and diabetes). ApoE4-induced detrimental CV changes include reduced cerebral blood flow (CBF), modified neuron-CBF coupling, increased blood-brain barrier leakiness, cerebral amyloid angiopathy, hemorrhages and disrupted transport of nutrients and toxins. The apoE4-induced detrimental changes may be linked to pericyte migration/activation, astrocyte activation, smooth muscle cell damage, basement membrane degradation and alterations in brain endothelial cells.
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Affiliation(s)
- Leon M Tai
- Department of Anatomy and Cell Biology, University of Illinois at Chicago, 808 S.Wood St., M/C 512, Chicago, IL, 60612, USA.
| | - Riya Thomas
- Department of Anatomy and Cell Biology, University of Illinois at Chicago, 808 S.Wood St., M/C 512, Chicago, IL, 60612, USA
| | - Felecia M Marottoli
- Department of Anatomy and Cell Biology, University of Illinois at Chicago, 808 S.Wood St., M/C 512, Chicago, IL, 60612, USA
| | - Kevin P Koster
- Department of Anatomy and Cell Biology, University of Illinois at Chicago, 808 S.Wood St., M/C 512, Chicago, IL, 60612, USA
| | - Takahisa Kanekiyo
- Department of Neuroscience, Mayo Clinic, Jacksonville, FL, 32224, USA
| | - Alan W J Morris
- Department of Anatomy and Cell Biology, University of Illinois at Chicago, 808 S.Wood St., M/C 512, Chicago, IL, 60612, USA
| | - Guojun Bu
- Department of Neuroscience, Mayo Clinic, Jacksonville, FL, 32224, USA
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