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Ton Loy AF, Adler JS, Merritt VC, Sorg SF, Bondi MW, Delano-Wood L. APOE×BDNF Interaction and Poorer Cognitive Outcomes Among Veterans With Mild Traumatic Brain Injury: An Exploratory Study. J Neuropsychiatry Clin Neurosci 2024:appineuropsych20230119. [PMID: 38988190 DOI: 10.1176/appi.neuropsych.20230119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/12/2024]
Abstract
OBJECTIVE The authors examined the interaction between apolipoprotein E (APOE) ε4 and brain-derived neurotrophic factor (BDNF) Val66Met alleles on neuropsychological functioning among veterans with histories of mild traumatic brain injury (mTBI). METHODS Participants were 78 veterans with mTBI (85% males; mean±SD age=32.95±7.00 years; mean time since injury=67.97±34.98 months) who completed a structured clinical interview and underwent a comprehensive neuropsychological assessment. Participants also provided a buccal swab for determination of their APOE and BDNF genotypes. Three cognitive composite scores were calculated from the neuropsychological assessment, reflecting visuospatial speed (seven variables), executive functioning (10 variables), and memory (eight variables). Two-way analyses of covariance (ANCOVAs) adjusted for age, sex, and race-ethnicity were used to assess the effects of APOE (ε4+ vs. ε4-) and BDNF (Met+ vs. Met-) on cognitive functioning. RESULTS ANCOVAs revealed no significant main effects of APOE or BDNF genotypes on cognitive functioning; however, there was a significant APOE-by-BDNF genotype interaction for all three cognitive composite measures (visuospatial speed: ηp2=0.055; executive functioning: ηp2=0.064; and memory: ηp2=0.068). Specifically, the ε4+/Met+ (N=8) subgroup demonstrated the poorest cognitive functioning relative to all other allele subgroups (ε4+/Met-: N=12, ε4-/Met+: N=23, and ε4-/Met-: N=35). CONCLUSIONS This exploratory study is the first to show that, compared with other allele subgroups assessed, veterans with both ε4 and Met alleles demonstrated the poorest cognitive functioning across several cognitive domains known to be negatively affected in the context of mTBI. Further research with larger sample sizes is needed to replicate these findings.
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Affiliation(s)
- Adan F Ton Loy
- Research and Psychology Services (Ton Loy, Adler, Merritt, Bondi, Delano-Wood) and Center of Excellence for Stress and Mental Health (Merritt, Delano-Wood), Veterans Affairs (VA) San Diego Healthcare System, San Diego; Department of Psychiatry, School of Medicine, University of California, San Diego, La Jolla (Merritt, Bondi, Delano-Wood); Home Base, a Red Sox Foundation and Massachusetts General Hospital Program, Boston, and Harvard Medical School, Boston (Sorg)
| | - Jennifer S Adler
- Research and Psychology Services (Ton Loy, Adler, Merritt, Bondi, Delano-Wood) and Center of Excellence for Stress and Mental Health (Merritt, Delano-Wood), Veterans Affairs (VA) San Diego Healthcare System, San Diego; Department of Psychiatry, School of Medicine, University of California, San Diego, La Jolla (Merritt, Bondi, Delano-Wood); Home Base, a Red Sox Foundation and Massachusetts General Hospital Program, Boston, and Harvard Medical School, Boston (Sorg)
| | - Victoria C Merritt
- Research and Psychology Services (Ton Loy, Adler, Merritt, Bondi, Delano-Wood) and Center of Excellence for Stress and Mental Health (Merritt, Delano-Wood), Veterans Affairs (VA) San Diego Healthcare System, San Diego; Department of Psychiatry, School of Medicine, University of California, San Diego, La Jolla (Merritt, Bondi, Delano-Wood); Home Base, a Red Sox Foundation and Massachusetts General Hospital Program, Boston, and Harvard Medical School, Boston (Sorg)
| | - Scott F Sorg
- Research and Psychology Services (Ton Loy, Adler, Merritt, Bondi, Delano-Wood) and Center of Excellence for Stress and Mental Health (Merritt, Delano-Wood), Veterans Affairs (VA) San Diego Healthcare System, San Diego; Department of Psychiatry, School of Medicine, University of California, San Diego, La Jolla (Merritt, Bondi, Delano-Wood); Home Base, a Red Sox Foundation and Massachusetts General Hospital Program, Boston, and Harvard Medical School, Boston (Sorg)
| | - Mark W Bondi
- Research and Psychology Services (Ton Loy, Adler, Merritt, Bondi, Delano-Wood) and Center of Excellence for Stress and Mental Health (Merritt, Delano-Wood), Veterans Affairs (VA) San Diego Healthcare System, San Diego; Department of Psychiatry, School of Medicine, University of California, San Diego, La Jolla (Merritt, Bondi, Delano-Wood); Home Base, a Red Sox Foundation and Massachusetts General Hospital Program, Boston, and Harvard Medical School, Boston (Sorg)
| | - Lisa Delano-Wood
- Research and Psychology Services (Ton Loy, Adler, Merritt, Bondi, Delano-Wood) and Center of Excellence for Stress and Mental Health (Merritt, Delano-Wood), Veterans Affairs (VA) San Diego Healthcare System, San Diego; Department of Psychiatry, School of Medicine, University of California, San Diego, La Jolla (Merritt, Bondi, Delano-Wood); Home Base, a Red Sox Foundation and Massachusetts General Hospital Program, Boston, and Harvard Medical School, Boston (Sorg)
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2
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Ji S, Kang J, Han C, Xu X, Chen M, Chen J, Chhetri JK, Pan J, Chan P. Potential role of APOE ɛ4 allele as a modifier for the association of BDNF Val66Met polymorphisms and cognitive impairment in community-dwelling older adults. Front Aging Neurosci 2024; 16:1330193. [PMID: 38374884 PMCID: PMC10876185 DOI: 10.3389/fnagi.2024.1330193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Accepted: 01/16/2024] [Indexed: 02/21/2024] Open
Abstract
Objective To determine whether the brain-derived neurotrophic factor (BDNF) Val66Met polymorphism is associated with cognitive impairment (CI) in community-dwelling Chinese older adults, and to investigate whether this relationship is modified by the Apolipoprotein E (APOE) ɛ4 allele. Methods The study is a secondary analysis of 703 participants aged ≥60 years randomly enrolled from the Beijing Longitudinal Study of Aging II prospective cohort. The education-adjusted Mini-Mental State Examination and the Clinical Dementia Rating Scale were used to measure the cognitive performance of the subjects. The main effects and interactions (additive and multiplicative) of the BDNF Met and the APOE ε4 alleles on CI were estimated by logistic regression models. Results In total, 84 out of 703 older adults aged ≥60 years old had CI. No significant difference was observed in the risk of CI between participants with the BDNF Met allele and that of subjects without the BDNF Met allele (p = 0.213; p = 0.164). Individuals carrying both the BDNF Met and APOE ε4 alleles had an almost 1.5-fold increased odds of CI compared with carriers of the BDNF Met allele but without the APOE ε4 allele. The additive association indicated a positive interaction of both BDNF Met and APOE ε4 alleles with wide CIs (p = 0.021; p = 0.018). Conclusion The results suggest that the APOE ε4 allele may be a potential modifier for the association of the BDNF Val66Met polymorphism with CI in community-dwelling older adults.
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Affiliation(s)
- Shaozhen Ji
- Department of Neurology, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Jia Kang
- Department of Neurology, The Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China
| | - Chao Han
- National Clinical Research Center for Geriatric Diseases, Xuanwu Hospital of Capital Medical University, Beijing, China
| | - Xitong Xu
- National Clinical Research Center for Geriatric Diseases, Xuanwu Hospital of Capital Medical University, Beijing, China
| | - Meijie Chen
- Department of Neurology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Jie Chen
- Department of Geriatrics, Shenzhen Hospital, Peking University, Shenzhen, China
| | - Jagadish K Chhetri
- National Clinical Research Center for Geriatric Diseases, Xuanwu Hospital of Capital Medical University, Beijing, China
| | - Jing Pan
- Department of Neurology, The Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China
| | - Piu Chan
- National Clinical Research Center for Geriatric Diseases, Xuanwu Hospital of Capital Medical University, Beijing, China
- Department of Neurobiology, Neurology and Geriatrics, Xuanwu Hospital of Capital Medical University, Beijing, China
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3
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Zhang R, Liu S, Mousavi SM. Cognitive Dysfunction and Exercise: From Epigenetic to Genetic Molecular Mechanisms. Mol Neurobiol 2024:10.1007/s12035-024-03970-7. [PMID: 38286967 DOI: 10.1007/s12035-024-03970-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 01/19/2024] [Indexed: 01/31/2024]
Abstract
Maintaining good health is crucial, and exercise plays a vital role in achieving this goal. It offers a range of positive benefits for cognitive function, regardless of age. However, as our population ages and life expectancy increases, cognitive impairment has become a prevalent issue, often coexisting with age-related neurodegenerative conditions. This can result in devastating consequences such as memory loss, difficulty speaking, and confusion, greatly hindering one's ability to lead an ordinary life. In addition, the decrease in mental capacity has a significant effect on an individual's physical and emotional well-being, greatly reducing their overall level of contentment and causing a significant financial burden for communities. While most current approaches aim to slow the decline of cognition, exercise offers a non-pharmacological, safe, and accessible solution. Its effects on cognition are intricate and involve changes in the brain's neural plasticity, mitochondrial stability, and energy metabolism. Moreover, exercise triggers the release of cytokines, playing a significant role in the body-brain connection and its impact on cognition. Additionally, exercise can influence gene expression through epigenetic mechanisms, leading to lasting improvements in brain function and behavior. Herein, we summarized various genetic and epigenetic mechanisms that can be modulated by exercise in cognitive dysfunction.
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Affiliation(s)
- Runhong Zhang
- Department of Physical Education, Luliang University, Lishi, 033000, Shanxi, China.
| | - Shangwu Liu
- Department of Physical Education, Luliang University, Lishi, 033000, Shanxi, China
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4
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Ciampa CJ, Morin TM, Murphy A, Joie RL, Landau SM, Berry AS. DAT1 and BDNF polymorphisms interact to predict Aβ and tau pathology. Neurobiol Aging 2024; 133:115-124. [PMID: 37948982 PMCID: PMC10872994 DOI: 10.1016/j.neurobiolaging.2023.10.009] [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: 05/05/2023] [Revised: 10/11/2023] [Accepted: 10/25/2023] [Indexed: 11/12/2023]
Abstract
Previous work has associated polymorphisms in the dopamine transporter gene (rs6347 in DAT1/SLC6A3) and brain derived neurotrophic factor gene (Val66Met in BDNF) with atrophy and memory decline. However, it is unclear whether these polymorphisms relate to atrophy and cognition through associations with Alzheimer's disease pathology. We tested for effects of DAT1 and BDNF polymorphisms on cross-sectional and longitudinal β-amyloid (Aβ) and tau pathology (measured with positron emission tomography (PET)), hippocampal volume, and cognition. We analyzed a sample of cognitively normal older adults (cross-sectional n = 321) from the Alzheimer's Disease Neuroimaging Initiative (ADNI). DAT1 and BDNF interacted to predict Aβ-PET, tau-PET, and hippocampal atrophy. Carriers of both "non-boptimal" DAT1 C and BDNF Met alleles demonstrated greater pathology and atrophy. Our findings provide novel links between dopamine and neurotrophic factor genes and AD pathology, consistent with previous research implicating these variants in greater risk for developing AD.
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Affiliation(s)
- Claire J Ciampa
- Department of Biology, Brandeis University, Waltham, MA 02453, USA.
| | - Thomas M Morin
- Department of Psychology, Brandeis University, Waltham, MA 02453, USA; Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Boston, MA 02155, USA
| | - Alice Murphy
- Hellen Wills Neuroscience Institute, University of California, Berkeley, CA 94720, USA
| | - Renaud La Joie
- Memory and Aging Center, Department of Neurology, University of California, San Francisco, CA 94158, USA
| | - Susan M Landau
- Hellen Wills Neuroscience Institute, University of California, Berkeley, CA 94720, USA; Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Anne S Berry
- Department of Psychology, Brandeis University, Waltham, MA 02453, USA; Volen Center for Complex Systems, Brandeis University, Waltham, MA 02453, USA
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5
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Collins JM, Bindoff AD, Roccati E, Alty JE, Vickers JC, King AE. Does serum neurofilament light help predict accelerated cognitive ageing in unimpaired older adults? Front Neurosci 2023; 17:1237284. [PMID: 37638317 PMCID: PMC10448959 DOI: 10.3389/fnins.2023.1237284] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 07/20/2023] [Indexed: 08/29/2023] Open
Abstract
Introduction Neurofilament light (NfL) is a blood biomarker of neurodegeneration. While serum NfL levels have been demonstrated to increase with normal ageing, the relationship between serum NfL levels and normal age-related changes in cognitive functions is less well understood. Methods The current study investigated whether cross-sectional serum NfL levels measured by single molecule array technology (Simoa®) mediated the effect of age on cognition, measured by a battery of neuropsychological tests administered biannually for 8 years, in a cohort of 174 unimpaired older adults (≥50 years) from the Tasmanian Healthy Brain Project. Mediation analysis was conducted using latent variables representing cognitive test performance on three cognitive domains - episodic memory, executive function, and language (vocabulary, comprehension, naming). Cognitive test scores for the three domains were estimated for each participant, coincident with blood collection in 2018 using linear Bayesian hierarchical models. Results Higher serum NfL levels were significantly positively associated with age (p < 0.001 for all domains). Cognitive test scores were significantly negatively associated with age across the domains of executive function (p < 0.001), episodic memory (p < 0.001) and language (p < 0.05). However, serum NfL levels did not significantly mediate the relationship between age and cognitive test scores across any of the domains. Discussion This study adds to the literature on the relationship between serum NfL levels and cognition in unimpaired older adults and suggests that serum NfL is not a pre-clinical biomarker of ensuing cognitive decline in unimpaired older adults.
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Affiliation(s)
- Jessica M. Collins
- Wicking Dementia Research and Education Centre, University of Tasmania, Hobart, TAS, Australia
| | - Aidan D. Bindoff
- Wicking Dementia Research and Education Centre, University of Tasmania, Hobart, TAS, Australia
| | - Eddy Roccati
- Wicking Dementia Research and Education Centre, University of Tasmania, Hobart, TAS, Australia
| | - Jane E. Alty
- Wicking Dementia Research and Education Centre, University of Tasmania, Hobart, TAS, Australia
- School of Medicine, University of Tasmania, Hobart, TAS, Australia
- Royal Hobart Hospital, Hobart, TAS, Australia
| | - James C. Vickers
- Wicking Dementia Research and Education Centre, University of Tasmania, Hobart, TAS, Australia
| | - Anna E. King
- Wicking Dementia Research and Education Centre, University of Tasmania, Hobart, TAS, Australia
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6
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Parrado Fernandez C, Juric S, Backlund M, Dahlström M, Madjid N, Lidell V, Rasti A, Sandin J, Nordvall G, Forsell P. Neuroprotective and Disease-Modifying Effects of the Triazinetrione ACD856, a Positive Allosteric Modulator of Trk-Receptors for the Treatment of Cognitive Dysfunction in Alzheimer's Disease. Int J Mol Sci 2023; 24:11159. [PMID: 37446337 DOI: 10.3390/ijms241311159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 06/30/2023] [Accepted: 07/04/2023] [Indexed: 07/15/2023] Open
Abstract
The introduction of anti-amyloid monoclonal antibodies against Alzheimer's disease (AD) is of high importance. However, even though treated patients show very little amyloid pathology, there is only a modest effect on the rate of cognitive decline. Although this effect can possibly increase over time, there is still a need for alternative treatments that will improve cognitive function in patients with AD. Therefore, the purpose of this study was to characterize the triazinetrione ACD856, a novel pan-Trk positive allosteric modulator, in multiple models to address its neuroprotective and potential disease-modifying effects. The pharmacological effect of ACD856 was tested in recombinant cell lines, primary cortical neurons, or animals. We demonstrate that ACD856 enhanced NGF-induced neurite outgrowth, increased the levels of the pre-synaptic protein SNAP25 in PC12 cells, and increased the degree of phosphorylated TrkB in SH-SY5Y cells. In primary cortical neurons, ACD856 led to increased levels of phospho-ERK1/2, showed a neuroprotective effect against amyloid-beta or energy-deprivation-induced neurotoxicity, and increased the levels of brain-derived neurotrophic factor (BDNF). Consequently, administration of ACD856 resulted in a significant increase in BDNF in the brains of 21 months old mice. Furthermore, repeated administration of ACD856 resulted in a sustained anti-depressant effect, which lasted up to seven days, suggesting effects that go beyond merely symptomatic effects. In conclusion, the results confirm ACD856 as a cognitive enhancer, but more importantly, they provide substantial in vitro and in vivo evidence of neuroprotective and long-term effects that contribute to neurotrophic support and increased neuroplasticity. Presumably, the described effects of ACD856 may improve cognition, increase resilience, and promote neurorestorative processes, thereby leading to a healthier brain in patients with AD.
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Affiliation(s)
- Cristina Parrado Fernandez
- AlzeCure Pharma AB, Hälsovägen 7, 141 57 Huddinge, Sweden
- Division of Neuroscience, Care and Society, Department of Neurogeriatrics, Karolinska Institutet, 171 77 Solna, Sweden
| | - Sanja Juric
- AlzeCure Pharma AB, Hälsovägen 7, 141 57 Huddinge, Sweden
| | - Maria Backlund
- AlzeCure Pharma AB, Hälsovägen 7, 141 57 Huddinge, Sweden
| | | | - Nather Madjid
- AlzeCure Pharma AB, Hälsovägen 7, 141 57 Huddinge, Sweden
| | | | - Azita Rasti
- AlzeCure Pharma AB, Hälsovägen 7, 141 57 Huddinge, Sweden
| | - Johan Sandin
- AlzeCure Pharma AB, Hälsovägen 7, 141 57 Huddinge, Sweden
- Division of Neuroscience, Care and Society, Department of Neurogeriatrics, Karolinska Institutet, 171 77 Solna, Sweden
| | - Gunnar Nordvall
- AlzeCure Pharma AB, Hälsovägen 7, 141 57 Huddinge, Sweden
- Division of Neuroscience, Care and Society, Department of Neurogeriatrics, Karolinska Institutet, 171 77 Solna, Sweden
| | - Pontus Forsell
- AlzeCure Pharma AB, Hälsovägen 7, 141 57 Huddinge, Sweden
- Division of Neuroscience, Care and Society, Department of Neurogeriatrics, Karolinska Institutet, 171 77 Solna, Sweden
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7
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Rovný R, Marko M, Michalko D, Mitka M, Cimrová B, Vančová Z, Jarčušková D, Dragašek J, Minárik G, Riečanský I. BDNF Val66Met polymorphism is associated with consolidation of episodic memory during sleep. Biol Psychol 2023; 179:108568. [PMID: 37075935 DOI: 10.1016/j.biopsycho.2023.108568] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 04/12/2023] [Accepted: 04/16/2023] [Indexed: 04/21/2023]
Abstract
The brain-derived neurotrophic factor (BDNF) is an essential regulator of synaptic plasticity, a candidate neurobiological mechanism underlying learning and memory. A functional polymorphism in the BDNF gene, Val66Met (rs6265), has been linked to memory and cognition in healthy individuals and clinical populations. Sleep contributes to memory consolidation, yet information about the possible role of BDNF in this process is scarce. To address this question, we investigated the relationship between the BDNF Val66Met genotype and consolidation of episodic declarative and procedural (motor) non-declarative memories in healthy adults. The carriers of Met66 allele, as compared with Val66 homozygotes, showed stronger forgetting overnight (24hours after encoding), but not over shorter time (immediately or 20minutes after word list presentation). There was no effect of Val66Met genotype on motor learning. These data suggest that BDNF plays a role in neuroplasticity underlying episodic memory consolidation during sleep.
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Affiliation(s)
- Rastislav Rovný
- Department of Behavioural Neuroscience, Centre of Experimental Medicine, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Martin Marko
- Department of Behavioural Neuroscience, Centre of Experimental Medicine, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Drahomír Michalko
- Department of Behavioural Neuroscience, Centre of Experimental Medicine, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Milan Mitka
- Department of Behavioural Neuroscience, Centre of Experimental Medicine, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Barbora Cimrová
- Department of Behavioural Neuroscience, Centre of Experimental Medicine, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Zuzana Vančová
- 1st Department of Psychiatry, Faculty of Medicine, Pavol Jozef Šafárik University and University Hospital, Košice, Slovakia
| | - Dominika Jarčušková
- 1st Department of Psychiatry, Faculty of Medicine, Pavol Jozef Šafárik University and University Hospital, Košice, Slovakia
| | - Jozef Dragašek
- 1st Department of Psychiatry, Faculty of Medicine, Pavol Jozef Šafárik University and University Hospital, Košice, Slovakia
| | | | - Igor Riečanský
- Department of Behavioural Neuroscience, Centre of Experimental Medicine, Slovak Academy of Sciences, Bratislava, Slovakia; Department of Psychiatry, Faculty of Medicine, Slovak Medical University, Bratislava, Slovakia.
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8
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Riegler KE, Fink S, Guty ET, Echemendia RJ, Arnett PA, Merritt VC. APOE & BDNF polymorphisms interact to affect memory performance at baseline in adolescent athletes. Child Neuropsychol 2022:1-13. [PMID: 36268760 DOI: 10.1080/09297049.2022.2136368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Although several single-nucleotide polymorphisms have been associated with cognitive functioning in a variety of healthy and clinical samples, the influence of gene × gene interactions on cognition is poorly understood. The purpose of this study was to examine interactive relationships between apolipoprotein E (APOE) and brain-derived neurotrophic factor (BDNF) polymorphisms on cognitive functioning in a sample of healthy adolescent athletes. Participants of this cross-sectional study included 78 student-athletes (52.6% male; age: M = 13.31, SD = 1.23). Athletes completed the Immediate Post-Concussion and Cognitive Testing (ImPACT) computerized battery at baseline. APOE and BDNF genotypes were determined with buccal samples (APOE ε4+: n = 26; APOE ε4-: n = 52; BDNF Met+: n = 23; BDNF Met-: n = 55). Two-way analyses of variance (ANOVAs) were used to evaluate the associations among APOE (ε4+ vs. ε4-) and BDNF (Met+ vs. Met-) genotypes and the ImPACT cognitive composites and two-factor model. No main effects were observed for either APOE or BDNF genotypes across the cognitive outcomes. However, there was a significant APOE × BDNF genotype interaction for the verbal (p=.009, ηp2=.091) and visual (p = .012, ηp2=.082) memory composites and the memory factor (p = .001, ηp2=.133), such that ε4+/Met+ carriers demonstrated poorer performance relative to other allele combinations. No significant interactions were observed for the visual motor speed (p = .263, ηp2=.017) or reaction time (p = .825, ηp2=.001) composites or the speed factor (p = .205, ηp2=.022). Our findings suggest an important relationship between APOE and BDNF genotypes on verbal and visual memory performance in healthy adolescent athletes. Clinicians may use this information to offer individualized concussion management based on individual athlete characteristics related to genetics and cognition.
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Affiliation(s)
- Kaitlin E Riegler
- Department of Psychology, The Pennsylvania State University, University Park, PA, USA.,Psychology Service, VA Connecticut Healthcare System, West Haven, CT, USA
| | - Shayna Fink
- Department of Psychology, The Pennsylvania State University, University Park, PA, USA
| | - Erin T Guty
- Department of Psychology, The Pennsylvania State University, University Park, PA, USA.,Mental Health Service, VA Maryland Healthcare System, Baltimore, MD, USA
| | - Ruben J Echemendia
- Concussion Care Clinic, University Orthopedics Center, State College, PA, USA
| | - Peter A Arnett
- Department of Psychology, The Pennsylvania State University, University Park, PA, USA
| | - Victoria C Merritt
- Research Service, VA San Diego Healthcare System (VASDHS), San Diego, CA, USA.,Department of Psychiatry, School of Medicine, University of California San Diego, La Jolla, CA, USA.,Center of Excellence for Stress and Mental Health, VASDHS, San Diego, CA, USA
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9
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Nordvall G, Forsell P, Sandin J. Neurotrophin-targeted therapeutics: A gateway to cognition and more? Drug Discov Today 2022; 27:103318. [PMID: 35850433 DOI: 10.1016/j.drudis.2022.07.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 07/05/2022] [Accepted: 07/12/2022] [Indexed: 02/09/2023]
Abstract
Neurotrophins, such as brain-derived neurotrophic factor (BDNF) and nerve growth factor (NGF), are small proteins expressed in the brain and peripheral tissues, which regulate several key aspects of neuronal function, including neurogenesis, synaptic plasticity and neuroprotection, but also programmed cell death. This broad range of effects is a result of a complex downstream signaling pathway, with differential spatial and temporal activation patterns further diversifying their physiological effects. Alterations in neurotrophin levels, or known polymorphisms in neurotrophin genes, have been linked to a variety of disorders, including depression and Alzheimer's disease (AD). Historically, their therapeutic potential in these disorders has been hampered by the lack of suitable tool molecules for clinical studies. However, recent advancements have led to the development of new therapeutic candidates, which are now in clinical testing.
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10
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Gao Y, Felsky D, Reyes-Dumeyer D, Sariya S, Rentería MA, Ma Y, Klein HU, Cosentino S, De Jager PL, Bennett DA, Brickman AM, Schellenberg GD, Mayeux R, Barral S. Integration of GWAS and brain transcriptomic analyses in a multiethnic sample of 35,245 older adults identifies DCDC2 gene as predictor of episodic memory maintenance. Alzheimers Dement 2022; 18:1797-1811. [PMID: 34873813 PMCID: PMC9170841 DOI: 10.1002/alz.12524] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 10/03/2021] [Accepted: 10/12/2021] [Indexed: 01/28/2023]
Abstract
Identifying genes underlying memory function will help characterize cognitively resilient and high-risk declining subpopulations contributing to precision medicine strategies. We estimated episodic memory trajectories in 35,245 ethnically diverse older adults representing eight independent cohorts. We conducted apolipoprotein E (APOE)-stratified genome-wide association study (GWAS) analyses and combined individual cohorts' results via meta-analysis. Three independent transcriptomics datasets were used to further interpret GWAS signals. We identified DCDC2 gene significantly associated with episodic memory (Pmeta = 3.3 x 10-8 ) among non-carriers of APOE ε4 (N = 24,941). Brain transcriptomics revealed an association between episodic memory maintenance and (1) increased dorsolateral prefrontal cortex DCDC2 expression (P = 3.8 x 10-4 ) and (2) lower burden of pathological Alzheimer's disease (AD) hallmarks (paired helical fragment tau P = .003, and amyloid beta load P = .008). Additional transcriptomics results comparing AD and cognitively healthy brain samples showed a downregulation of DCDC2 levels in superior temporal gyrus (P = .007) and inferior frontal gyrus (P = .013). Our work identified DCDC2 gene as a novel predictor of memory maintenance.
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Affiliation(s)
- Yizhe Gao
- Taub Institute for Research on Alzheimer’s Disease
and the Aging Brain, Vagelos College of Physicians and Surgeons, Columbia
University, New York, NY, USA
| | - Daniel Felsky
- Krembil Centre for Neuroinformatics, Centre for Addiction
and Mental Health, Toronto, ON, Canada.,Department of Psychiatry & Institute of Medical
Science, University of Toronto, Toronto, ON, Canada
| | - Dolly Reyes-Dumeyer
- Taub Institute for Research on Alzheimer’s Disease
and the Aging Brain, Vagelos College of Physicians and Surgeons, Columbia
University, New York, NY, USA.,G.H. Sergievsky Center, Vagelos College of Physicians and
Surgeons, Columbia University, New York, NY, USA.,Department of Neurology, Vagelos College of Physicians and
Surgeons, New York-Presbyterian Hospital, Columbia University Medical Center, New
York, NY, USA
| | - Sanjeev Sariya
- Taub Institute for Research on Alzheimer’s Disease
and the Aging Brain, Vagelos College of Physicians and Surgeons, Columbia
University, New York, NY, USA
| | - Miguel Arce Rentería
- Taub Institute for Research on Alzheimer’s Disease
and the Aging Brain, Vagelos College of Physicians and Surgeons, Columbia
University, New York, NY, USA.,Department of Neurology, Vagelos College of Physicians and
Surgeons, New York-Presbyterian Hospital, Columbia University Medical Center, New
York, NY, USA
| | - Yiyi Ma
- Center for Translational & Computational
Neuroimmunology, Department of Neurology, Columbia University Irving Medical Center,
New York, NY, 10032, USA
| | - Hans-Ulrich Klein
- Taub Institute for Research on Alzheimer’s Disease
and the Aging Brain, Vagelos College of Physicians and Surgeons, Columbia
University, New York, NY, USA.,Center for Translational & Computational
Neuroimmunology, Department of Neurology, Columbia University Irving Medical Center,
New York, NY, 10032, USA
| | - Stephanie Cosentino
- Taub Institute for Research on Alzheimer’s Disease
and the Aging Brain, Vagelos College of Physicians and Surgeons, Columbia
University, New York, NY, USA.,G.H. Sergievsky Center, Vagelos College of Physicians and
Surgeons, Columbia University, New York, NY, USA.,Department of Neurology, Vagelos College of Physicians and
Surgeons, New York-Presbyterian Hospital, Columbia University Medical Center, New
York, NY, USA
| | - Philip L. De Jager
- Taub Institute for Research on Alzheimer’s Disease
and the Aging Brain, Vagelos College of Physicians and Surgeons, Columbia
University, New York, NY, USA.,Center for Translational & Computational
Neuroimmunology, Department of Neurology, Columbia University Irving Medical Center,
New York, NY, 10032, USA.,Cell Circuits Program, Broad Institute, Cambridge, MA,
USA
| | - David A. Bennett
- Rush University Medical Center, Rush Alzheimer’s
Disease Center, Chicago, IL, USA.,Rush University Medical Center, Department of Neurological
Sciences, Chicago, IL, USA
| | - Adam M. Brickman
- Taub Institute for Research on Alzheimer’s Disease
and the Aging Brain, Vagelos College of Physicians and Surgeons, Columbia
University, New York, NY, USA.,G.H. Sergievsky Center, Vagelos College of Physicians and
Surgeons, Columbia University, New York, NY, USA.,Department of Neurology, Vagelos College of Physicians and
Surgeons, New York-Presbyterian Hospital, Columbia University Medical Center, New
York, NY, USA
| | - Gerard D. Schellenberg
- Department of Pathology and Laboratory Medicine,
University of Pennsylvania, Philadelphia, PA, USA
| | - Richard Mayeux
- Taub Institute for Research on Alzheimer’s Disease
and the Aging Brain, Vagelos College of Physicians and Surgeons, Columbia
University, New York, NY, USA.,G.H. Sergievsky Center, Vagelos College of Physicians and
Surgeons, Columbia University, New York, NY, USA.,Department of Neurology, Vagelos College of Physicians and
Surgeons, New York-Presbyterian Hospital, Columbia University Medical Center, New
York, NY, USA
| | - Sandra Barral
- Taub Institute for Research on Alzheimer’s Disease
and the Aging Brain, Vagelos College of Physicians and Surgeons, Columbia
University, New York, NY, USA.,G.H. Sergievsky Center, Vagelos College of Physicians and
Surgeons, Columbia University, New York, NY, USA.,Department of Neurology, Vagelos College of Physicians and
Surgeons, New York-Presbyterian Hospital, Columbia University Medical Center, New
York, NY, USA
| | -
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Vagelos College of Physicians and Surgeons, Columbia University, New York, New York, USA
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11
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Harnish SM, Diedrichs VA, Bartlett CW. EARLY CONSIDERATIONS OF GENETICS IN APHASIA REHABILITATION: A NARRATIVE REVIEW. APHASIOLOGY 2022; 37:835-853. [PMID: 37346093 PMCID: PMC10281715 DOI: 10.1080/02687038.2022.2043234] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 02/14/2022] [Indexed: 06/23/2023]
Abstract
Background Early investigations linking language and genetics were focused on the evolution of human communication in populations with developmental speech and language disorders. Recently, studies suggest that genes may also modulate recovery from post-stroke aphasia. Aims Our goal is to review current literature related to the influence of genetics on post-stroke recovery, and the implications for aphasia rehabilitation. We describe candidate genes implicated by empirical findings and address additional clinical considerations. Main Contribution We describe existing evidence and mechanisms supporting future investigations into how genetic factors may modulate aphasia recovery and propose that two candidate genes, brain derived neurotrophic factor (BDNF) and apolipoprotein E (APOE), may be important considerations for future research assessing response to aphasia treatment. Evidence suggests that BDNF is important for learning, memory, and neuroplasticity. APOE influences cognitive functioning and memory in older individuals and has also been implicated in neural repair. Moreover, recent data suggest an interaction between specific alleles of the BDNF and APOE genes in influencing episodic memory. Conclusions Genetic influences on recovery from aphasia have been largely unexplored in the literature despite evidence that genetic factors influence behaviour and recovery from brain injury. As researchers continue to explore prognostic factors that may influence response to aphasia treatment, it is time for genetic factors to be considered as a source of variability. As the field moves in the direction of personalized medicine, eventually allied health professionals may utilize genetic profiles to inform treatment decisions and education for patients and care partners.
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Affiliation(s)
- Stacy M Harnish
- Department of Speech and Hearing Science, The Ohio State University
| | | | - Christopher W Bartlett
- Battelle Center for Mathematical Medicine, Abigail Wexner Research Institute at Nationwide Children's Hospital and Department of Pediatrics, College of Medicine, The Ohio State University
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12
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Wefel JS, Zhou R, Sulman EP, Boehling NS, Armstrong GN, Tsavachidis S, Liang FW, Etzel CJ, Kahalley LS, Small BJ, Scheurer ME, Bondy ML, Liu Y. Genetic modulation of longitudinal change in neurocognitive function among adult glioma patients. J Neurooncol 2021; 156:185-193. [PMID: 34817796 DOI: 10.1007/s11060-021-03905-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Accepted: 11/17/2021] [Indexed: 11/24/2022]
Abstract
PURPOSE Impaired neurocognitive function (NCF) is extremely common in patients with higher grade primary brain tumor. We previously reported evidence of genetic variants associated with NCF in glioma patients prior to treatment. However, little is known about the effect of genetic variants on NCF decline after adjuvant therapy. METHODS Patients (N = 102) completed longitudinal NCF assessments that included measures of verbal memory, processing speed, and executive function. Testing was conducted in the postoperative period with an average follow up interval of 1.3 years. We examined polymorphisms in 580 genes related to five pathways (inflammation, DNA repair, metabolism, cognitive, and telomerase). RESULTS Five polymorphisms were associated with longitudinal changes in processing speed and 14 polymorphisms with executive function. Change in processing speed was strongly associated with MCPH1 rs17631450 (P = 2.2 × 10-7) and CCDC26 rs7005206 (P = 9.3 × 10-7) in the telomerase pathway; while change in executive function was more strongly associated with FANCF rs1514084 (P = 2.9 × 10-6) in the DNA repair pathway and DAOA rs12428572 (P = 2.4 × 10-5) in the cognitive pathway. Joint effect analysis found significant genetic-dosage effects for longitudinal changes in processing speed (Ptrend = 1.5 × 10-10) and executive function (Ptrend = 2.1 × 10-11). In multivariable analyses, predictors of NCF decline included progressive disease, lower baseline NCF performance, and more at-risk genetic variants, after adjusting for age, sex, education, tumor location, histology, and disease progression. CONCLUSION Our longitudinal analyses revealed that polymorphisms in telomerase, DNA repair, and cognitive pathways are independent predictors of decline in NCF in glioma patients.
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Affiliation(s)
- Jeffrey S Wefel
- Section of Neuropsychology, Department of Neuro-Oncology, The University of Texas M.D. Anderson Cancer Center, 1515 Holcombe Boulevard, Unit 431, Houston, TX, 77030, USA.
| | - Renke Zhou
- Dan L. Duncan Comprehensive Cancer Center, Baylor College of Medicine, One Baylor Plaza, Mailstop BCM305, Houston, TX, 77030, USA
| | - Erik P Sulman
- Department of Radiation Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, TX, 77030, USA
| | - Nicholas S Boehling
- Department of Radiation Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, TX, 77030, USA
| | - Georgina N Armstrong
- Dan L. Duncan Comprehensive Cancer Center, Baylor College of Medicine, One Baylor Plaza, Mailstop BCM305, Houston, TX, 77030, USA
| | - Spiridon Tsavachidis
- Dan L. Duncan Comprehensive Cancer Center, Baylor College of Medicine, One Baylor Plaza, Mailstop BCM305, Houston, TX, 77030, USA
| | - Fu-Wen Liang
- Institute of Public Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Carol J Etzel
- Biostatistics, Corrona, LLC, Southborough, MA, 01772, USA
| | - Lisa S Kahalley
- Department of Pediatrics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Brent J Small
- School of Aging Studies, University of South Florida, 4202 E Fowler Avenue, Tampa, FL, 33620, USA
| | - Michael E Scheurer
- Dan L. Duncan Comprehensive Cancer Center, Baylor College of Medicine, One Baylor Plaza, Mailstop BCM305, Houston, TX, 77030, USA
| | - Melissa L Bondy
- Dan L. Duncan Comprehensive Cancer Center, Baylor College of Medicine, One Baylor Plaza, Mailstop BCM305, Houston, TX, 77030, USA.
| | - Yanhong Liu
- Dan L. Duncan Comprehensive Cancer Center, Baylor College of Medicine, One Baylor Plaza, Mailstop BCM305, Houston, TX, 77030, USA.
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13
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The potential roles of genetic factors in predicting ageing-related cognitive change and Alzheimer's disease. Ageing Res Rev 2021; 70:101402. [PMID: 34242808 DOI: 10.1016/j.arr.2021.101402] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 06/22/2021] [Accepted: 07/02/2021] [Indexed: 12/21/2022]
Abstract
Alzheimer's disease (AD) is a complex neurological disorder of uncertain aetiology, although substantial research has been conducted to explore important factors related to risk of onset and progression. Both lifestyle (e.g., complex mental stimulation, vascular health) and genetic factors (e.g., APOE, BDNF, PICALM, CLU, APP, PSEN1, PSEN2, and other genes) have been associated with AD risk. Despite more than thirty years of genetic research, much of the heritability of AD is not explained by measured loci. This suggests that the missing heritability of AD might be potentially related to rare variants, gene-environment and gene-gene interactions, and potentially epigenetic modulators. Moreover, while ageing is the most substantial factor risk for AD, there are limited longitudinal studies examining the association of genetic factors with decline in cognitive function due to ageing and the preclinical stages of this condition. This review summarises findings from currently available research on the genetic factors of ageing-related cognitive change and AD and suggests some future research directions.
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14
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Dahlström M, Madjid N, Nordvall G, Halldin MM, Vazquez-Juarez E, Lindskog M, Sandin J, Winblad B, Eriksdotter M, Forsell P. Identification of Novel Positive Allosteric Modulators of Neurotrophin Receptors for the Treatment of Cognitive Dysfunction. Cells 2021; 10:1871. [PMID: 34440640 PMCID: PMC8391421 DOI: 10.3390/cells10081871] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 07/16/2021] [Accepted: 07/19/2021] [Indexed: 01/01/2023] Open
Abstract
Alzheimer's disease (AD) is the most common neurodegenerative disorder and results in severe neurodegeneration and progressive cognitive decline. Neurotrophins are growth factors involved in the development and survival of neurons, but also in underlying mechanisms for memory formation such as hippocampal long-term potentiation. Our aim was to identify small molecules with stimulatory effects on the signaling of two neurotrophins, the nerve growth factor (NGF) and the brain derived neurotrophic factor (BDNF). To identify molecules that could potentiate neurotrophin signaling, 25,000 molecules were screened, which led to the identification of the triazinetrione derivatives ACD855 (Ponazuril) and later on ACD856, as positive allosteric modulators of tropomyosin related kinase (Trk) receptors. ACD855 or ACD856 potentiated the cellular signaling of the neurotrophin receptors with EC50 values of 1.9 and 3.2 or 0.38 and 0.30 µM, respectively, for TrkA or TrkB. ACD855 increased acetylcholine levels in the hippocampus by 40% and facilitated long term potentiation in rat brain slices. The compounds acted as cognitive enhancers in a TrkB-dependent manner in several different behavioral models. Finally, the age-induced cognitive dysfunction in 18-month-old mice could be restored to the same level as found in 2-month-old mice after a single treatment of ACD856. We have identified a novel mechanism to modulate the activity of the Trk-receptors. The identification of the positive allosteric modulators of the Trk-receptors might have implications for the treatment of Alzheimer's diseases and other diseases characterized by cognitive impairment.
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MESH Headings
- Age Factors
- Animals
- Behavior, Animal/drug effects
- Brain/drug effects
- Brain/enzymology
- Brain/physiopathology
- Cell Line, Tumor
- Cognition/drug effects
- Cognitive Dysfunction/drug therapy
- Cognitive Dysfunction/enzymology
- Cognitive Dysfunction/physiopathology
- Cognitive Dysfunction/psychology
- Disease Models, Animal
- Humans
- Male
- Maze Learning/drug effects
- Membrane Glycoproteins
- Mice, Inbred C57BL
- Motor Activity/drug effects
- Nootropic Agents/pharmacology
- Protein-Tyrosine Kinases
- Rats, Sprague-Dawley
- Receptor, trkA/agonists
- Receptor, trkA/metabolism
- Receptor, trkB/agonists
- Receptor, trkB/metabolism
- Receptors, Nerve Growth Factor/agonists
- Receptors, Nerve Growth Factor/genetics
- Receptors, Nerve Growth Factor/metabolism
- Signal Transduction
- Small Molecule Libraries
- Triazines/pharmacology
- Mice
- Rats
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Affiliation(s)
- Märta Dahlström
- AlzeCure Pharma AB, 141 57 Huddinge, Sweden; (M.D.); (N.M.); (G.N.); (M.M.H.); (J.S.)
- Division of Clinical Geriatrics, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, 141 83 Huddinge, Sweden;
- AlzeCure Foundation, 141 57 Huddinge, Sweden
| | - Nather Madjid
- AlzeCure Pharma AB, 141 57 Huddinge, Sweden; (M.D.); (N.M.); (G.N.); (M.M.H.); (J.S.)
- AlzeCure Foundation, 141 57 Huddinge, Sweden
| | - Gunnar Nordvall
- AlzeCure Pharma AB, 141 57 Huddinge, Sweden; (M.D.); (N.M.); (G.N.); (M.M.H.); (J.S.)
- AlzeCure Foundation, 141 57 Huddinge, Sweden
- Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, 171 77 Solna, Sweden; (E.V.-J.); (M.L.); (B.W.)
| | - Magnus M. Halldin
- AlzeCure Pharma AB, 141 57 Huddinge, Sweden; (M.D.); (N.M.); (G.N.); (M.M.H.); (J.S.)
- AlzeCure Foundation, 141 57 Huddinge, Sweden
| | - Erika Vazquez-Juarez
- Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, 171 77 Solna, Sweden; (E.V.-J.); (M.L.); (B.W.)
| | - Maria Lindskog
- Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, 171 77 Solna, Sweden; (E.V.-J.); (M.L.); (B.W.)
| | - Johan Sandin
- AlzeCure Pharma AB, 141 57 Huddinge, Sweden; (M.D.); (N.M.); (G.N.); (M.M.H.); (J.S.)
- AlzeCure Foundation, 141 57 Huddinge, Sweden
- Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, 171 77 Solna, Sweden; (E.V.-J.); (M.L.); (B.W.)
| | - Bengt Winblad
- Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, 171 77 Solna, Sweden; (E.V.-J.); (M.L.); (B.W.)
- Theme Inflammation and Aging, Karolinska University Hospital, 141 86 Huddinge, Sweden
| | - Maria Eriksdotter
- Division of Clinical Geriatrics, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, 141 83 Huddinge, Sweden;
- Theme Inflammation and Aging, Karolinska University Hospital, 141 86 Huddinge, Sweden
| | - Pontus Forsell
- AlzeCure Pharma AB, 141 57 Huddinge, Sweden; (M.D.); (N.M.); (G.N.); (M.M.H.); (J.S.)
- AlzeCure Foundation, 141 57 Huddinge, Sweden
- Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, 171 77 Solna, Sweden; (E.V.-J.); (M.L.); (B.W.)
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15
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Interactive effects of the APOE and BDNF polymorphisms on functional brain connectivity: the Tasmanian Healthy Brain Project. Sci Rep 2021; 11:14514. [PMID: 34267235 PMCID: PMC8282840 DOI: 10.1038/s41598-021-93610-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 06/24/2021] [Indexed: 11/27/2022] Open
Abstract
Resting-state functional magnetic resonance imaging measures pathological alterations in neurodegenerative diseases, including Alzheimer’s disease. Disruption in functional connectivity may be a potential biomarker of ageing and early brain changes associated with AD-related genes, such as APOE and BDNF. The objective of this study was to identify group differences in resting-state networks between individuals with BDNF Val66Met and APOE polymorphisms in cognitively healthy older persons. Dual regression following Independent Components Analysis were performed to examine differences associated with these polymorphisms. APOE ε3 homozygotes showed stronger functional connectivity than APOE ε4 carriers. Males showed stronger functional connectivity between the Default Mode Network (DMN) and grey matter premotor cortex, while females showed stronger functional connectivity between the executive network and lateral occipital cortex and parahippocampal gyrus. Additionally, we found that with increasing cognitive reserve, functional connectivity increased within the Dorsal Attention Network (DAN), but decreased within the DMN. Interaction effects indicated stronger functional connectivity in Met/ε3 carriers than in Met/ε4 and Val/ε4 within both the DMN and DAN. APOE/BDNF interactions may therefore influence the integrity of functional brain connections in older adults, and may underlie a vulnerable phenotype for subsequent Alzheimer’s-type dementia.
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16
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Butterbrod E, Sitskoorn M, Bakker M, Jakobs B, Fleischeuer R, Roijers J, Rutten G, Gehring K. The APOE ε4 allele in relation to pre- and postsurgical cognitive functioning of patients with primary brain tumors. Eur J Neurol 2021; 28:1665-1676. [PMID: 33342004 PMCID: PMC8247965 DOI: 10.1111/ene.14693] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 12/03/2020] [Accepted: 12/06/2020] [Indexed: 12/01/2022]
Abstract
BACKGROUND Recent studies suggest a relationship between the APOE ε4 allele and cognitive outcome in patients treated for malignant brain tumors. Still, longitudinal investigations that include a pretreatment cognitive assessment are lacking and APOE's effects in patients with benign tumors are understudied. This study investigated presurgical cognitive performance and postsurgical change in ε4-carrying and non-carrying patients with glioma and meningioma. METHODS Neuropsychological test scores (CNS Vital Signs battery [seven measures], Digit Span Forward/Backward, Letter Fluency test) were obtained as part of a prospective study in which patients with meningioma and glioma underwent cognitive assessment 1 day before (T0, n = 505) and 3 (T3, n = 418) and 12 months after (T12, n = 167) surgery. APOE isoforms were identified retrospectively. ε4 carriers and non-carriers were compared with regard to pretreatment cognitive performance on the group and individual level. Changes in performances over time were compared with longitudinal mixed model analysis in the total sample and the subgroup receiving adjuvant treatment. RESULTS Carriers and non-carriers did not differ with regard to pretreatment performance. No significant main effect of ε4 carrier status or interaction between time (T0-T12) and carrier status was found on any of the tests in the whole sample nor in the sample receiving adjuvant treatment. CONCLUSIONS This study found no evidence of increased vulnerability for pretreatment cognitive dysfunction or cognitive decline within 1 year after surgery in APOE ε4-carrying meningioma and glioma patients. Investigations that include larger samples at longer-term follow-up are recommended to investigate potential late treatment effects.
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Affiliation(s)
- Elke Butterbrod
- Department of Cognitive NeuropsychologyTilburg UniversityTilburgThe Netherlands
| | - Margriet Sitskoorn
- Department of Cognitive NeuropsychologyTilburg UniversityTilburgThe Netherlands
| | - Marjan Bakker
- Department of Methodology and StatisticsTilburg UniversityTilburgThe Netherlands
| | - Bernadette Jakobs
- Department of Laboratory MedicineElisabeth‐Tweesteden HospitalTilburgThe Netherlands
| | - Ruth Fleischeuer
- Clinical Pathology LaboratoryElisabeth‐Tweesteden HospitalTilburgThe Netherlands
| | - Janine Roijers
- Department of Laboratory MedicineElisabeth‐Tweesteden HospitalTilburgThe Netherlands
| | - Geert‐Jan Rutten
- Department of NeurosurgeryElisabeth‐Tweesteden HospitalTilburgThe Netherlands
| | - Karin Gehring
- Department of Cognitive NeuropsychologyTilburg UniversityTilburgThe Netherlands
- Department of NeurosurgeryElisabeth‐Tweesteden HospitalTilburgThe Netherlands
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17
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Cechova K, Andel R, Angelucci F, Chmatalova Z, Markova H, Laczó J, Vyhnalek M, Matoska V, Kaplan V, Nedelska Z, Ward DD, Hort J. Impact of APOE and BDNF Val66Met Gene Polymorphisms on Cognitive Functions in Patients with Amnestic Mild Cognitive Impairment. J Alzheimers Dis 2021; 73:247-257. [PMID: 31771052 DOI: 10.3233/jad-190464] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Apolipoprotein (APOE) ɛ4 is a well-known risk factor for late-onset Alzheimer's disease (AD), but other AD-related gene polymorphisms might also be important, such as the polymorphism within the brain-derived neurotrophic factor (BDNF) gene. Carriage of BDNF Val66Met has been associated with faster cognitive decline and greater hippocampal atrophy in cognitively normal elderly. Thus, we examined the effects of the concurrent presence of APOE and BDNF polymorphisms on cognitive functions and brain morphometry in amnestic mild cognitive impairment (aMCI) patients. 107 aMCI patients (mean age = 72.2) were recruited from the Czech Brain Aging Study and, based on APOE and BDNF genes polymorphisms, were divided into four groups: ɛ4-BDNFVal/Val (n = 37), ɛ4-BDNFMet (n = 19), ɛ4+BDNFVal/Val (n = 35), and ɛ4+BDNFMet (n = 16). All patients underwent clinical examination, magnetic resonance imaging, and complex neuropsychological battery. The combination of APOEɛ4+ and BDNF Met was associated with significantly worse memory performance in immediate and delayed recall compared to other polymorphism groups. We did not observe increased atrophy in areas related to memory function in the ɛ4+BDNFMet group. Our findings suggest that carriage of ɛ4+BDNFMet is associated with more pronounced memory dysfunction, a typical feature of early AD, but not with structural brain changes in aMCI patients. These findings suggest that in APOEɛ4/BDNF Met carriers, synaptic dysfunction affecting memory may precede pronounced structural changes.
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Affiliation(s)
- Katerina Cechova
- Department of Neurology, Memory Clinic, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic.,International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czech Republic
| | - Ross Andel
- Department of Neurology, Memory Clinic, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic.,International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czech Republic.,School of Aging Studies, University of South Florida, Tampa, FL, USA
| | - Francesco Angelucci
- Department of Neurology, Memory Clinic, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
| | - Zuzana Chmatalova
- International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czech Republic.,Department of Medical Chemistry and Clinical Biochemistry, 2nd Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Hana Markova
- Department of Neurology, Memory Clinic, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic.,International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czech Republic
| | - Jan Laczó
- Department of Neurology, Memory Clinic, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic.,International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czech Republic
| | - Martin Vyhnalek
- Department of Neurology, Memory Clinic, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic.,International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czech Republic
| | - Vaclav Matoska
- Department of Clinical Biochemistry, Hematology and Immunology, Homolka Hospital, Prague, Czech Republic
| | - Vojtech Kaplan
- Department of Clinical Biochemistry, Hematology and Immunology, Homolka Hospital, Prague, Czech Republic
| | - Zuzana Nedelska
- Department of Neurology, Memory Clinic, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic.,International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czech Republic
| | - David D Ward
- Department of Medicine, Division of Geriatric Medicine, Dalhousie University, Halifax, Nova Scotia, Canada.,Centre for Health Care of the Elderly, QEII Health Sciences Centre, Nova Scotia Health Authority, Halifax, Nova Scotia, Canada
| | - Jakub Hort
- Department of Neurology, Memory Clinic, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic.,International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czech Republic
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18
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de Las Heras B, Rodrigues L, Cristini J, Weiss M, Prats-Puig A, Roig M. Does the Brain-Derived Neurotrophic Factor Val66Met Polymorphism Modulate the Effects of Physical Activity and Exercise on Cognition? Neuroscientist 2020; 28:69-86. [PMID: 33300425 DOI: 10.1177/1073858420975712] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The Val66Met is a polymorphism of the brain-derived neurotrophic factor (BDNF) gene that encodes a substitution of a valine (Val) to methionine (Met) amino acid. Carrying this polymorphism reduces the activity-dependent secretion of the BDNF protein, which can potentially affect brain plasticity and cognition. We reviewed the biology of Val66Met and surveyed 26 studies (11,417 participants) that examined the role of this polymorphism in moderating the cognitive response to physical activity (PA) and exercise. Nine observational studies confirmed a moderating effect of Val66Met on the cognitive response to PA but differences between Val and Met carriers were inconsistent and only significant in some cognitive domains. Only five interventional studies found a moderating effect of Val66Met on the cognitive response to exercise, which was also inconsistent in its direction. Two studies showed a superior cognitive response in Val carriers and three studies showed a better response in Met carriers. These results do not support a general and consistent effect of Val66Met in moderating the cognitive response to PA or exercise. Both Val and Met carriers can improve specific aspects of cognition by increasing PA and engaging in exercise. Causes for discrepancies among studies, effect moderators, and future directions are discussed.
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Affiliation(s)
- Bernat de Las Heras
- Memory and Motor Rehabilitation Laboratory (MEMORY-LAB), Feil and Oberfeld Research Centre, Jewish Rehabilitation Hospital, Montreal Center for Interdisciplinary Research in Rehabilitation (CRIR), Laval, Quebec, Canada.,School of Physical and Occupational Therapy, Faculty of Medicine, McGill University, Montreal, Quebec, Canada
| | - Lynden Rodrigues
- Memory and Motor Rehabilitation Laboratory (MEMORY-LAB), Feil and Oberfeld Research Centre, Jewish Rehabilitation Hospital, Montreal Center for Interdisciplinary Research in Rehabilitation (CRIR), Laval, Quebec, Canada.,School of Physical and Occupational Therapy, Faculty of Medicine, McGill University, Montreal, Quebec, Canada
| | - Jacopo Cristini
- Memory and Motor Rehabilitation Laboratory (MEMORY-LAB), Feil and Oberfeld Research Centre, Jewish Rehabilitation Hospital, Montreal Center for Interdisciplinary Research in Rehabilitation (CRIR), Laval, Quebec, Canada.,School of Physical and Occupational Therapy, Faculty of Medicine, McGill University, Montreal, Quebec, Canada
| | - Maxana Weiss
- Memory and Motor Rehabilitation Laboratory (MEMORY-LAB), Feil and Oberfeld Research Centre, Jewish Rehabilitation Hospital, Montreal Center for Interdisciplinary Research in Rehabilitation (CRIR), Laval, Quebec, Canada.,School of Physical and Occupational Therapy, Faculty of Medicine, McGill University, Montreal, Quebec, Canada
| | - Anna Prats-Puig
- University School of Health and Sport (EUSES), University of Girona, Girona, Catalunya, Spain
| | - Marc Roig
- Memory and Motor Rehabilitation Laboratory (MEMORY-LAB), Feil and Oberfeld Research Centre, Jewish Rehabilitation Hospital, Montreal Center for Interdisciplinary Research in Rehabilitation (CRIR), Laval, Quebec, Canada.,School of Physical and Occupational Therapy, Faculty of Medicine, McGill University, Montreal, Quebec, Canada
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Sanders CL, Rattinger GB, Deberard MS, Hammond AG, Wengreen H, Kauwe JSK, Buhusi M, Tschanz JT. Interaction Between Physical Activity and Genes Related to Neurotrophin Signaling in Late-Life Cognitive Performance: The Cache County Study. J Gerontol A Biol Sci Med Sci 2020; 75:1633-1642. [PMID: 31504225 PMCID: PMC7494026 DOI: 10.1093/gerona/glz200] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2019] [Indexed: 01/23/2023] Open
Abstract
Research indicates that lifestyle and genetic factors influence the course of cognitive impairment in aging, but their interactions have not been well-examined. This study examined the relationship between physical activity and genotypes related to brain-derived neurotrophic factor (BDNF) in predicting cognitive performance in a sample of older adults with up to 12 years of follow-up. Physical activity levels (sedentary, light, and moderate/vigorous) were determined for the sample of 3,591 participants (57% female) without dementia. The genotypes examined included BDNF gene single nucleotide polymorphisms (SNPs) (rs6265 and rs56164415) and receptor gene SNPs (NTRK2 rs2289656 and NGFR rs2072446). Cognition was assessed triennially using the Modified Mini-Mental State Exam. Unadjusted linear mixed models indicated that sedentary (β = -5.05) and light (β = -2.41) groups performed worse than moderate-vigorous (p < .001). Addition of interaction effects showed significant differences in rate of decline between activity levels, particularly among males (p = .006). A three-way interaction with sex, NGFR SNP rs2072446, and physical activity suggested that the C/C allele was associated with better cognitive performance among males engaging in light activity only (p = .004). Physical activity and sex, but not BDNF-related SNPs, predicted rate of cognitive decline in older adults, while NGFR rs2072446 may modify main effects.
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Affiliation(s)
| | - Gail B Rattinger
- School of Pharmacy and Pharmaceutical Sciences, Binghamton University, New York
| | | | | | - Heidi Wengreen
- Dietetics and Food Sciences Department, Utah State University, Logan
| | - John S K Kauwe
- Biology Department, Brigham Young University, Provo, Utah
| | - Mona Buhusi
- Department of Psychology, Utah State University, Logan
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20
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Vilor-Tejedor N, Operto G, Evans TE, Falcon C, Crous-Bou M, Minguillón C, Cacciaglia R, Milà-Alomà M, Grau-Rivera O, Suárez-Calvet M, Garrido-Martín D, Morán S, Esteller M, Adams HH, Molinuevo JL, Guigó R, Gispert JD. Effect of BDNF Val66Met on hippocampal subfields volumes and compensatory interaction with APOE-ε4 in middle-age cognitively unimpaired individuals from the ALFA study. Brain Struct Funct 2020; 225:2331-2345. [PMID: 32804326 PMCID: PMC7544723 DOI: 10.1007/s00429-020-02125-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Accepted: 07/30/2020] [Indexed: 11/08/2022]
Abstract
Background Current evidence supports the involvement of brain-derived neurotrophic factor (BDNF) Val66Met polymorphism, and the ε4 allele of APOE gene in hippocampal-dependent functions. Previous studies on the association of Val66Met with whole hippocampal volume included patients of a variety of disorders. However, it remains to be elucidated whether there is an impact of BDNF Val66Met polymorphism on the volumes of the hippocampal subfield volumes (HSv) in cognitively unimpaired (CU) individuals, and the interactive effect with the APOE-ε4 status. Methods BDNF Val66Met and APOE genotypes were determined in a sample of 430 CU late/middle-aged participants from the ALFA study (ALzheimer and FAmilies). Participants underwent a brain 3D-T1-weighted MRI scan, and volumes of the HSv were determined using Freesurfer (v6.0). The effects of the BDNF Val66Met genotype on the HSv were assessed using general linear models corrected by age, gender, education, number of APOE-ε4 alleles and total intracranial volume. We also investigated whether the association between APOE-ε4 allele and HSv were modified by BDNF Val66Met genotypes. Results BDNF Val66Met carriers showed larger bilateral volumes of the subiculum subfield. In addition, HSv reductions associated with APOE-ε4 allele were significantly moderated by BDNF Val66Met status. BDNF Met carriers who were also APOE-ε4 homozygous showed patterns of higher HSv than BDNF Val carriers. Conclusion To our knowledge, the present study is the first to show that carrying the BDNF Val66Met polymorphisms partially compensates the decreased on HSv associated with APOE-ε4 in middle-age cognitively unimpaired individuals. Electronic supplementary material The online version of this article (10.1007/s00429-020-02125-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Natalia Vilor-Tejedor
- Centre for Genomic Regulation (CRG), The Barcelona Institute for Science and Technology, C. Doctor Aiguader 88, Edif. PRBB, 08003, Barcelona, Spain. .,Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, Barcelona, Spain. .,Erasmus MC University Medical Center Rotterdam, Department of Clinical Genetics, Rotterdam, The Netherlands. .,Universitat Pompeu Fabra (UPF), Barcelona, Spain.
| | - Grégory Operto
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, Barcelona, Spain.,CIBER Fragilidad y Envejecimiento Saludable (CIBERFES), Madrid, Spain.,IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
| | - Tavia E Evans
- Erasmus MC University Medical Center Rotterdam, Department of Clinical Genetics, Rotterdam, The Netherlands
| | - Carles Falcon
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, Barcelona, Spain.,IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain.,Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Madrid, Spain
| | - Marta Crous-Bou
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, Barcelona, Spain.,Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA.,Cancer Epidemiology Research Program, Catalan Institute of Oncology (ICO), Hospitalet de Llobregat, Barcelona, Spain
| | - Carolina Minguillón
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, Barcelona, Spain.,CIBER Fragilidad y Envejecimiento Saludable (CIBERFES), Madrid, Spain.,IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
| | - Raffaele Cacciaglia
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, Barcelona, Spain.,CIBER Fragilidad y Envejecimiento Saludable (CIBERFES), Madrid, Spain.,IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
| | - Marta Milà-Alomà
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, Barcelona, Spain.,Universitat Pompeu Fabra (UPF), Barcelona, Spain.,CIBER Fragilidad y Envejecimiento Saludable (CIBERFES), Madrid, Spain.,IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
| | - Oriol Grau-Rivera
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, Barcelona, Spain.,CIBER Fragilidad y Envejecimiento Saludable (CIBERFES), Madrid, Spain.,IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain.,Servei de Neurologia, Hospital del Mar, Barcelona, Spain
| | - Marc Suárez-Calvet
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, Barcelona, Spain.,CIBER Fragilidad y Envejecimiento Saludable (CIBERFES), Madrid, Spain.,IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain.,Servei de Neurologia, Hospital del Mar, Barcelona, Spain
| | - Diego Garrido-Martín
- Centre for Genomic Regulation (CRG), The Barcelona Institute for Science and Technology, C. Doctor Aiguader 88, Edif. PRBB, 08003, Barcelona, Spain
| | - Sebastián Morán
- Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Biomedical Research Institute (IDIBELL), Barcelona, Spain
| | - Manel Esteller
- Cancer Epigenetics and Biology Program (PEBC), Bellvitge Biomedical Biomedical Research Institute (IDIBELL), Barcelona, Spain.,Josep Carreras Leukaemia Research Institute (IJC), Badalona, Barcelona, Spain.,Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain.,Physiological Sciences Department, School of Medicine and Health Sciences, University of Barcelona (UB), Barcelona, Spain
| | - Hieab H Adams
- Erasmus MC University Medical Center Rotterdam, Department of Clinical Genetics, Rotterdam, The Netherlands.,Erasmus MC University Medical Center Rotterdam, Department of Epidemiology, Rotterdam, The Netherlands.,Erasmus MC University Medical Center Rotterdam, Department of Radiology, Rotterdam, The Netherlands
| | - José Luis Molinuevo
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, Barcelona, Spain.,Universitat Pompeu Fabra (UPF), Barcelona, Spain.,CIBER Fragilidad y Envejecimiento Saludable (CIBERFES), Madrid, Spain.,IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
| | - Roderic Guigó
- Centre for Genomic Regulation (CRG), The Barcelona Institute for Science and Technology, C. Doctor Aiguader 88, Edif. PRBB, 08003, Barcelona, Spain.,Universitat Pompeu Fabra (UPF), Barcelona, Spain
| | - Juan Domingo Gispert
- Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, Barcelona, Spain. .,Universitat Pompeu Fabra (UPF), Barcelona, Spain. .,IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain. .,Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Madrid, Spain.
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The BDNF Val66Met Polymorphism Modulates Resilience of Neurological Functioning to Brain Ageing and Dementia: A Narrative Review. Brain Sci 2020; 10:brainsci10040195. [PMID: 32218234 PMCID: PMC7226504 DOI: 10.3390/brainsci10040195] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 03/19/2020] [Accepted: 03/24/2020] [Indexed: 02/06/2023] Open
Abstract
Brain-derived neurotropic factor (BDNF) is an abundant and multi-function neurotrophin in the brain. It is released following neuronal activity and is believed to be particularly important in strengthening neural networks. A common variation in the BDNF gene, a valine to methionine substitution at codon 66 (Val66Met), has been linked to differential expression of BDNF associated with experience-dependent plasticity. The Met allele has been associated with reduced production of BDNF following neuronal stimulation, which suggests a potential role of this variation with respect to how the nervous system may respond to challenges, such as brain ageing and related neurodegenerative conditions (e.g., dementia and Alzheimer’s disease). The current review examines the potential of the BDNF Val66Met variation to modulate an individual’s susceptibility and trajectory through cognitive changes associated with ageing and dementia. On balance, research to date indicates that the BDNF Met allele at this codon is potentially associated with a detrimental influence on the level of cognitive functioning in older adults and may also impart increased risk of progression to dementia. Furthermore, recent studies also show that this genetic variation may modulate an individual’s response to interventions targeted at building cognitive resilience to conditions that cause dementia.
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22
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Laczó J, Cechova K, Parizkova M, Lerch O, Andel R, Matoska V, Kaplan V, Matuskova V, Nedelska Z, Vyhnalek M, Hort J. The Combined Effect of APOE and BDNF Val66Met Polymorphisms on Spatial Navigation in Older Adults. J Alzheimers Dis 2020; 78:1473-1492. [PMID: 33325388 PMCID: PMC7836052 DOI: 10.3233/jad-200615] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/21/2020] [Indexed: 12/15/2022]
Abstract
BACKGROUND The apolipoprotein E (APOE) ɛ4 allele is associated with episodic memory and spatial navigation deficits. The brain-derived neurotrophic factor (BDNF) Met allele may further worsen memory impairment in APOEɛ4 carriers but its role in APOEɛ4-related spatial navigation deficits has not been established. OBJECTIVE We examined influence of APOE and BDNF Val66Met polymorphism combination on spatial navigation and volumes of selected navigation-related brain regions in cognitively unimpaired (CU) older adults and those with amnestic mild cognitive impairment (aMCI). METHODS 187 participants (aMCI [n = 116] and CU [n = 71]) from the Czech Brain Aging Study were stratified based on APOE and BDNF Val66Met polymorphisms into four groups: ɛ4-/BDNFVal/Val, ɛ4-/BDNFMet, ɛ4+/BDNFVal/Val, and ɛ4+/BDNFMet. The participants underwent comprehensive neuropsychological examination, brain MRI, and spatial navigation testing of egocentric, allocentric, and allocentric delayed navigation in a real-space human analogue of the Morris water maze. RESULTS Among the aMCI participants, the ɛ4+/BDNFMet group had the least accurate egocentric navigation performance (p < 0.05) and lower verbal memory performance than the ɛ4-/BDNFVal/Val group (p = 0.007). The ɛ4+/BDNFMet group had smaller hippocampal and entorhinal cortical volumes than the ɛ4-/BDNFVal/Val (p≤0.019) and ɛ4-/BDNFMet (p≤0.020) groups. Among the CU participants, the ɛ4+/BDNFMet group had less accurate allocentric and allocentric delayed navigation performance than the ɛ4-/BDNFVal/Val group (p < 0.05). CONCLUSION The combination of APOEɛ4 and BDNF Met polymorphisms is associated with more pronounced egocentric navigation impairment and atrophy of the medial temporal lobe regions in individuals with aMCI and less accurate allocentric navigation in CU older adults.
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Affiliation(s)
- Jan Laczó
- Memory Clinic, Department of Neurology, Charles University, 2nd Faculty of Medicine and Motol University Hospital, Prague, Czech Republic
- International Clinical Research Center, St. Anne’s University Hospital Brno, Brno, Czech Republic
| | - Katerina Cechova
- Memory Clinic, Department of Neurology, Charles University, 2nd Faculty of Medicine and Motol University Hospital, Prague, Czech Republic
- International Clinical Research Center, St. Anne’s University Hospital Brno, Brno, Czech Republic
| | - Martina Parizkova
- Memory Clinic, Department of Neurology, Charles University, 2nd Faculty of Medicine and Motol University Hospital, Prague, Czech Republic
- International Clinical Research Center, St. Anne’s University Hospital Brno, Brno, Czech Republic
| | - Ondrej Lerch
- Memory Clinic, Department of Neurology, Charles University, 2nd Faculty of Medicine and Motol University Hospital, Prague, Czech Republic
- International Clinical Research Center, St. Anne’s University Hospital Brno, Brno, Czech Republic
| | - Ross Andel
- Memory Clinic, Department of Neurology, Charles University, 2nd Faculty of Medicine and Motol University Hospital, Prague, Czech Republic
- International Clinical Research Center, St. Anne’s University Hospital Brno, Brno, Czech Republic
- School of Aging Studies, University of South Florida, Tampa, FL, USA
| | - Vaclav Matoska
- Department of Clinical Biochemistry, Hematology and Immunology, Homolka Hospital, Prague, Czech Republic
| | - Vojtech Kaplan
- Department of Clinical Biochemistry, Hematology and Immunology, Homolka Hospital, Prague, Czech Republic
| | - Veronika Matuskova
- Memory Clinic, Department of Neurology, Charles University, 2nd Faculty of Medicine and Motol University Hospital, Prague, Czech Republic
- International Clinical Research Center, St. Anne’s University Hospital Brno, Brno, Czech Republic
| | - Zuzana Nedelska
- Memory Clinic, Department of Neurology, Charles University, 2nd Faculty of Medicine and Motol University Hospital, Prague, Czech Republic
- International Clinical Research Center, St. Anne’s University Hospital Brno, Brno, Czech Republic
| | - Martin Vyhnalek
- Memory Clinic, Department of Neurology, Charles University, 2nd Faculty of Medicine and Motol University Hospital, Prague, Czech Republic
- International Clinical Research Center, St. Anne’s University Hospital Brno, Brno, Czech Republic
| | - Jakub Hort
- Memory Clinic, Department of Neurology, Charles University, 2nd Faculty of Medicine and Motol University Hospital, Prague, Czech Republic
- International Clinical Research Center, St. Anne’s University Hospital Brno, Brno, Czech Republic
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Coeloglossum viride var. bracteatum extract improves learning and memory of chemically-induced aging mice through upregulating neurotrophins BDNF and FGF2 and sequestering neuroinflammation. J Funct Foods 2019. [DOI: 10.1016/j.jff.2019.03.045] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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The Contribution of Genetic Factors to Cognitive Impairment and Dementia: Apolipoprotein E Gene, Gene Interactions, and Polygenic Risk. Int J Mol Sci 2019; 20:ijms20051177. [PMID: 30866553 PMCID: PMC6429136 DOI: 10.3390/ijms20051177] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 02/26/2019] [Indexed: 12/19/2022] Open
Abstract
Alzheimer's disease (AD) is a progressive neurodegenerative disease. Although it has been studied for years, the pathogenesis of AD is still controversial. Genetic factors may play an important role in pathogenesis, with the apolipoprotein E (APOE) gene among the greatest risk factors for AD. In this review, we focus on the influence of genetic factors, including the APOE gene, the interaction between APOE and other genes, and the polygenic risk factors for cognitive function and dementia. The presence of the APOE ε4 allele is associated with increased AD risk and reduced age of AD onset. Accelerated cognitive decline and abnormal internal environment, structure, and function of the brain were also found in ε4 carriers. The effect of the APOE promoter on cognition and the brain was confirmed by some studies, but further investigation is still needed. We also describe the effects of the associations between APOE and other genetic risk factors on cognition and the brain that exhibit a complex gene⁻gene interaction, and we consider the importance of using a polygenic risk score to investigate the association between genetic variance and phenotype.
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Pietzuch M, King AE, Ward DD, Vickers JC. The Influence of Genetic Factors and Cognitive Reserve on Structural and Functional Resting-State Brain Networks in Aging and Alzheimer's Disease. Front Aging Neurosci 2019; 11:30. [PMID: 30894813 PMCID: PMC6414800 DOI: 10.3389/fnagi.2019.00030] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 02/01/2019] [Indexed: 01/22/2023] Open
Abstract
Magnetic resonance imaging (MRI) offers significant insight into the complex organization of neural networks within the human brain. Using resting-state functional MRI data, topological maps can be created to visualize changes in brain activity, as well as to represent and assess the structural and functional connections between different brain regions. Crucially, Alzheimer's disease (AD) is associated with progressive loss in this connectivity, which is particularly evident within the default mode network. In this paper, we review the recent literature on how factors that are associated with risk of dementia may influence the organization of the brain network structures. In particular, we focus on cognitive reserve and the common genetic polymorphisms of APOE and BDNF Val66Met.
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Affiliation(s)
- Manuela Pietzuch
- Wicking Dementia Research and Education Centre, College of Health and Medicine, University of Tasmania, Hobart, TAS, Australia
| | - Anna E. King
- Wicking Dementia Research and Education Centre, College of Health and Medicine, University of Tasmania, Hobart, TAS, Australia
| | - David D. Ward
- Population Health Sciences, German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany
| | - James C. Vickers
- Wicking Dementia Research and Education Centre, College of Health and Medicine, University of Tasmania, Hobart, TAS, Australia
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Toh YL, Ng T, Tan M, Tan A, Chan A. Impact of brain-derived neurotrophic factor genetic polymorphism on cognition: A systematic review. Brain Behav 2018; 8:e01009. [PMID: 29858545 PMCID: PMC6043712 DOI: 10.1002/brb3.1009] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Revised: 04/08/2018] [Accepted: 04/15/2018] [Indexed: 01/17/2023] Open
Abstract
INTRODUCTION Brain-derived neurotrophic factor (BDNF) has an important role in the neurogenesis and neuroplasticity of the brain. This systematic review was designed to examine the association between BDNF Val66Met (rs6265) polymorphism and four cognitive domains-attention and concentration, executive function, verbal fluency, and memory, respectively. METHODOLOGY Primary literature search was performed using search engines such as PubMed and Scopus. Observational studies that evaluated the neurocognitive performances in relation to BDNF polymorphism within human subjects were included in this review, while animal studies, overlapping studies, and meta-analysis were excluded. RESULTS Forty of 82 reviewed studies (48.8%) reported an association between Val66Met polymorphism and neurocognitive domains. The proportion of the studies showing positive findings in cognitive performances between Val/Val homozygotes and Met carriers was comparable, at 30.5% and 18.3%, respectively. The highest percentage of positive association between Val66Met polymorphism and neurocognition was reported under the memory domain, with 26 of 63 studies (41.3%), followed by 18 of 47 studies (38.3%) under the executive function domain and four of 23 studies (17.4%) under the attention and concentration domain. There were no studies showing an association between Val66Met polymorphism and verbal fluency. In particular, Val/Val homozygotes performed better in tasks related to the memory domain, while Met carriers performed better in terms of executive function, in both healthy individuals and clinical populations. CONCLUSION While numerous studies report an association between Val66Met polymorphism and neurocognitive changes in executive function and memory domains, the effect of Met allele has not been clearly established.
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Affiliation(s)
- Yi Long Toh
- Department of PharmacyFaculty of ScienceNational University of SingaporeSingaporeSingapore
| | - Terence Ng
- Department of PharmacyFaculty of ScienceNational University of SingaporeSingaporeSingapore
| | - Megan Tan
- Department of PharmacyFaculty of ScienceNational University of SingaporeSingaporeSingapore
| | - Azrina Tan
- Department of PharmacyFaculty of ScienceNational University of SingaporeSingaporeSingapore
| | - Alexandre Chan
- Department of PharmacyFaculty of ScienceNational University of SingaporeSingaporeSingapore
- Department of PharmacyNational Cancer Centre SingaporeSingaporeSingapore
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O'Donoghue MC, Murphy SE, Zamboni G, Nobre AC, Mackay CE. APOE genotype and cognition in healthy individuals at risk of Alzheimer's disease: A review. Cortex 2018; 104:103-123. [DOI: 10.1016/j.cortex.2018.03.025] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 02/02/2018] [Accepted: 03/19/2018] [Indexed: 01/22/2023]
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Fisher DW, Bennett DA, Dong H. Sexual dimorphism in predisposition to Alzheimer's disease. Neurobiol Aging 2018; 70:308-324. [PMID: 29754747 DOI: 10.1016/j.neurobiolaging.2018.04.004] [Citation(s) in RCA: 144] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 04/08/2018] [Accepted: 04/10/2018] [Indexed: 12/20/2022]
Abstract
Clinical studies indicate that Alzheimer's disease (AD) disproportionately affects women in both disease prevalence and rate of symptom progression, but the mechanisms underlying this sexual divergence are unknown. Although some have suggested this difference in risk is a reflection of the known differences in longevity between men and women, mounting clinical and preclinical evidence supports women also having intrinsic susceptibilities toward the disease. Although a number of potential risk factors have been hypothesized to mediate these differences, none have been definitively verified. In this review, we first summarize the epidemiologic studies of prevalence and incidence of AD among the sexes. Next, we discuss the most likely risk factors to date that interact with biological sex, including (1) genetic factors, (2) sex hormones (3) deviations in brain structure, (4) inflammation and microglia, and (5) and psychosocial stress responses. Overall, though differences in life span are likely to account for part of the divide between the sexes in AD prevalence, the abundance of preclinical and clinical evidence presented here suggests an increase in intrinsic AD risk for women. Therefore, future studies focusing on the underlying biological mechanisms for this phenomenon are needed to better understand AD pathogenesis in both sexes, with the eventual goal of sex-specific prevention and treatment strategies.
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Affiliation(s)
- Daniel W Fisher
- Departments of Psychiatry and Behavioral Sciences, Northwestern University, Feinberg School of Medicine, Chicago, IL, USA
| | - David A Bennett
- Department of Neurological Sciences, Rush Alzheimer's Disease Center, Rush Medical College, Chicago, IL, USA
| | - Hongxin Dong
- Departments of Psychiatry and Behavioral Sciences, Northwestern University, Feinberg School of Medicine, Chicago, IL, USA.
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Weinstein G, Preis SR, Beiser AS, Kaess B, Chen TC, Satizabal C, Rahman F, Benjamin EJ, Vasan RS, Seshadri S. Clinical and Environmental Correlates of Serum BDNF: A Descriptive Study with Plausible Implications for AD Research. Curr Alzheimer Res 2018; 14:722-730. [PMID: 28164772 DOI: 10.2174/1567205014666170203094520] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 12/13/2016] [Accepted: 01/27/2017] [Indexed: 12/19/2022]
Abstract
BACKGROUND Brain derived neurotrophic factor (BDNF) may play a central role in the pathogenesis of Alzheimer's disease (AD) through neurotrophic effects on basal cholinergic neurons. Reduced serum levels of BDND are observed among AD patients and may predict AD risk. Nevertheless, knowledge about factors associated with its levels in blood is lacking. OBJECTIVE To identify clinical and demographic correlates of serum BDNF levels. METHODS BDNF was measured from serum collected between 1992-1996 and 1998-2001 in participants from the Original and Offspring cohorts of the Framingham Study, respectively. A cross-sectional analysis was done to evaluate the relationship between clinical measures and BDNF levels using standard linear regression and stepwise models. Analyses were conducted in the total sample and separately in each cohort, and were adjusted for age and sex. RESULTS BDNF was measured in 3,689 participants (mean age 65 years, 56% women; 82% Offspring). Cigarette smoking and high total cholesterol were associated with elevated BDNF levels, and history of atrial fibrillation was associated with decreased levels. Elevated BDNF levels were related to greater physical activity and lower Tumor Necrosis Factor-α levels in Offspring. Stepwise models also revealed associations with statin use, alcohol consumption and Apolipoprotein Eε4 genotype. CONCLUSION Serum BDNF correlates with various metabolic, inflammatory and life-style measures which in turn have been linked with risk of AD. Future studies of serum BDNF should adjust for these correlates and are needed to further explore the underlying interplay between BDNF and other factors in the pathophysiology of cognitive impairment and AD.
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Affiliation(s)
- Galit Weinstein
- School of Public Health, University of Haifa, 199 Aba Khoushy Ave., Mount Carmel, Haifa. Israel
| | | | - Alexa S Beiser
- The Department of Biostatistics, Boston University School of Public Health, Boston, MA, United States
| | | | - Tai C Chen
- The Department of Neurology, Boston University School of Medicine, Boston, MA, United States
| | - Claudia Satizabal
- The Department of Neurology, Boston University School of Medicine, Boston, MA, United States
| | - Faisal Rahman
- The Department of Medicine, Boston University School of Medicine, Boston, MA, United States
| | - Emelia J Benjamin
- The Department of Epidemiology, Boston University School of Public Health, Boston, MA, Boston, United States
| | - Ramachandran S Vasan
- The Department of Epidemiology, Boston University School of Public Health, Boston, MA, Boston, United States
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Lin PH, Tsai SJ, Huang CW, Mu-En L, Hsu SW, Lee CC, Chen NC, Chang YT, Lan MY, Chang CC. Dose-dependent genotype effects of BDNF Val66Met polymorphism on default mode network in early stage Alzheimer's disease. Oncotarget 2018; 7:54200-54214. [PMID: 27494844 PMCID: PMC5342335 DOI: 10.18632/oncotarget.11027] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Accepted: 07/22/2016] [Indexed: 01/09/2023] Open
Abstract
In humans, brain-derived neurotrophic factor (BDNF) has been shown to play a pivotal role in neurocognition, and its gene contains a functional polymorphism (Val66Met) that may explain individual differences in brain volume and memory-related activity.In this study, we enrolled 186 Alzheimer's disease (AD) patients who underwent 3D T1 magnetic resonance imaging, and explored the gray matter (GM) structural covariance networks (SCN). The patients were divided into three groups according to their genotype: Met/Met (n = 45), Val/Met (n = 86) and Val/Val (n = 55). Seed-based analysis was performed focusing on four SCN networks. Neurobehavioral scores served as the major outcome factor.Only peak cluster volumes of default mode medial temporal lobe network showed significant genotype interactions, of which the interconnected peak clusters showed dose-dependent genotype effects. There were also significant correlations between the cognitive test scores and interconnected-cluster volumes, especially in the orbitofrontal cortex.These findings support the hypothesis that BDNF rs6265 polymorphisms modulate entorhinal cortex-interconnected clusters and the valine allele was associated with stronger structural covariance patterns that determined the cognitive outcomes.
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Affiliation(s)
- Pin-Hsuan Lin
- Department of Health and Beauty, Shu-Zen College of Medicine and Management, Kaohsiung, Taiwan
| | - Shih-Jen Tsai
- Psychiatric Department of Taipei Veterans General Hospital, Taipei, Taiwan.,Psychiatric Division, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Chi-Wei Huang
- Department of Health and Beauty, Shu-Zen College of Medicine and Management, Kaohsiung, Taiwan.,Department of Neurology, Cognition and Aging Center, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Liu Mu-En
- Psychiatric Division, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Shih-Wei Hsu
- Department of Radiology, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Chen-Chang Lee
- Department of Radiology, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Nai-Ching Chen
- Department of Health and Beauty, Shu-Zen College of Medicine and Management, Kaohsiung, Taiwan.,Department of Neurology, Cognition and Aging Center, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Ya-Ting Chang
- Department of Health and Beauty, Shu-Zen College of Medicine and Management, Kaohsiung, Taiwan.,Department of Neurology, Cognition and Aging Center, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Min-Yu Lan
- Department of Neurology, Cognition and Aging Center, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Chiung-Chih Chang
- Department of Neurology, Cognition and Aging Center, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan
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Thow ME, Summers MJ, Saunders NL, Summers JJ, Ritchie K, Vickers JC. Further education improves cognitive reserve and triggers improvement in selective cognitive functions in older adults: The Tasmanian Healthy Brain Project. ALZHEIMER'S & DEMENTIA: DIAGNOSIS, ASSESSMENT & DISEASE MONITORING 2017; 10:22-30. [PMID: 29034310 PMCID: PMC5633863 DOI: 10.1016/j.dadm.2017.08.004] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Introduction The strong link between early-life education and subsequent reduced risk of dementia suggests that education in later life could enhance cognitive function and may reduce age-related cognitive decline and protect against dementia. Methods Episodic memory, working memory, executive function, and language processing performances were assessed annually over 4 years in 359 healthy older adults who attended university for a minimum of 12 months (intervention) and were compared against 100 healthy adult controls. Results Multiple group latent growth curve modeling revealed a significant improvement in language processing capacity over time in the intervention group. No changes were detected for episodic memory, working memory, or executive function. Discussion These results suggest that complex mental stimulation resulting from late-life further education results in improved crystallized knowledge but no changes to fluid cognitive functions. Early-life educational attainment predicts dementia. Early-life educational attainment predicts rate of cognitive decline. Late-life education in healthy adults improves language processing capacity. Late-life education enhances crystallized knowledge not fluid cognitive abilities.
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Affiliation(s)
- Megan E Thow
- School of Medicine, Faculty of Health, University of Tasmania, Australia
| | - Mathew J Summers
- Sunshine Coast Mind & Neuroscience - Thompson Institute, University of the Sunshine Coast, Queensland, Australia.,Wicking Dementia Research & Education Centre, Faculty of Health, University of Tasmania, Hobart, Australia
| | - Nichole L Saunders
- Wicking Dementia Research & Education Centre, Faculty of Health, University of Tasmania, Hobart, Australia
| | - Jeffery J Summers
- School of Medicine, Faculty of Health, University of Tasmania, Australia.,Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, United Kingdom
| | | | - James C Vickers
- School of Medicine, Faculty of Health, University of Tasmania, Australia.,Wicking Dementia Research & Education Centre, Faculty of Health, University of Tasmania, Hobart, Australia
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Association between the serotonin transporter gene polymorphism and verbal learning in older adults is moderated by gender. Transl Psychiatry 2017; 7:e1144. [PMID: 28585929 PMCID: PMC5537635 DOI: 10.1038/tp.2017.107] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Revised: 01/29/2017] [Accepted: 02/26/2017] [Indexed: 11/09/2022] Open
Abstract
The S allele of the functional 5-HTTLPR polymorphism has previously been associated with reductions in memory function. Given the change in function of the serotonergic system in older adults, and the functional consequences of memory decline in this age group, further investigation into the impact of 5-HTTLPR in healthy older adults is required. This investigation examined the effect of 5-HTTLPR variants (S carriers versus L/L homozygotes) on verbal and visual episodic memory in 438 healthy older adults participating in the Tasmanian Healthy Brain Project (age range 50-79 years, M=60.35, s.d.=6.75). Direct effects of 5-HTTLPR on memory processes, in addition to indirect effects through interaction with age and gender, were assessed. Although no direct effects of 5-HTTLPR on memory processes were identified, our results indicated that gender significantly moderated the impact that 5-HTTLPR variants exerted on the relationship between age and verbal episodic memory function as assessed by the Rey Auditory Verbal Learning Test. No significant direct or indirect effects were identified in relation to visual memory performance. Overall, this investigation found evidence to suggest that 5-HTTLPR genotype affects the association of age and verbal episodic memory for males and females differently, with the predicted negative effect of S carriage present in males but not females. Such findings indicate a gender-dependent role for 5-HTTLPR in the verbal episodic memory system of healthy older adults.
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Gu LH, Chen J, Gao LJ, Shu H, Wang Z, Liu D, Yan YN, Li SJ, Zhang ZJ. The Effect of Apolipoprotein E ε4 (APOE ε4) on Visuospatial Working Memory in Healthy Elderly and Amnestic Mild Cognitive Impairment Patients: An Event-Related Potentials Study. Front Aging Neurosci 2017; 9:145. [PMID: 28567013 PMCID: PMC5434145 DOI: 10.3389/fnagi.2017.00145] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 04/30/2017] [Indexed: 12/17/2022] Open
Abstract
Background: Apolipoprotein E (APOE) ε4 is the only established risk gene for late-onset, sporadic Alzheimer’s disease (AD). Previous studies have provided inconsistent evidence for the effect of APOE ε4 status on the visuospatial working memory (VSWM). Objective: The aim was to investigate the effect of APOE ε4 on VSWM with an event-related potential (ERP) study in healthy controls (HC) and amnestic mild cognitive impairment (aMCI) patients. Methods: The study recorded 39 aMCI patients (27 APOE ε4 non-carriers and 12 APOE ε4 carriers) and their 43 matched controls (25 APOE ε4 non-carriers and 18 APOE ε4 carriers) with an 64-channel electroencephalogram. Participants performed an N-back task, a VSWM paradigm that manipulated the number of items to be stored in memory. Results: The present study detected reduced accuracy and delayed mean correct response time (RT) in aMCI patients compared to HC. P300, a positive component that peaks between 300 and 500 ms, was elicited by the VSWM task. In addition, aMCI patients showed decreased P300 amplitude at the central–parietal (CP1, CPz, and CP2) and parietal (P1, Pz, and P2) electrodes in 0- and 1-back task compared to HC. In both HC and aMCI patients, APOE ε4 carriers showed reduced P300 amplitude with respect to non-carriers, whereas no significant differences in accuracy or RT were detected between APOE ε4 carriers and non-carriers. Additionally, standardized low-resolution brain electromagnetic tomography analysis (s-LORETA) showed enhanced brain activation in the right parahippocampal gyrus (PHG) during P300 time range in APOE ε4 carriers with respect to non-carriers in aMCI patients. Conclusion: It demonstrated that P300 amplitude could predict VSWM deficits in aMCI patients and contribute to early detection of VSWM deficits in APOE ε4 carriers.
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Affiliation(s)
- Li-Hua Gu
- Department of Neurology, Affiliated ZhongDa Hospital, School of Medicine, Southeast UniversityNanjing, China
| | - Jiu Chen
- Department of Neurology, Affiliated ZhongDa Hospital, School of Medicine, Southeast UniversityNanjing, China
| | - Li-Juan Gao
- Department of Neurology, Affiliated ZhongDa Hospital, School of Medicine, Southeast UniversityNanjing, China
| | - Hao Shu
- Department of Neurology, Affiliated ZhongDa Hospital, School of Medicine, Southeast UniversityNanjing, China
| | - Zan Wang
- Department of Neurology, Affiliated ZhongDa Hospital, School of Medicine, Southeast UniversityNanjing, China
| | - Duan Liu
- Department of Neurology, Affiliated ZhongDa Hospital, School of Medicine, Southeast UniversityNanjing, China
| | - Yan-Na Yan
- Department of Psychology, Xinxiang Medical UniversityXinxiang, China
| | - Shi-Jiang Li
- Department of Biophysics, Medical College of Wisconsin, MilwaukeeWI, United States
| | - Zhi-Jun Zhang
- Department of Neurology, Affiliated ZhongDa Hospital, School of Medicine, Southeast UniversityNanjing, China.,Department of Psychology, Xinxiang Medical UniversityXinxiang, China
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Ward DD, Andel R, Saunders NL, Thow ME, Klekociuk SZ, Bindoff AD, Vickers JC. The BDNF Val66Met polymorphism moderates the effect of cognitive reserve on 36-month cognitive change in healthy older adults. ALZHEIMERS & DEMENTIA-TRANSLATIONAL RESEARCH & CLINICAL INTERVENTIONS 2017; 3:323-331. [PMID: 29067339 PMCID: PMC5651414 DOI: 10.1016/j.trci.2017.04.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Introduction Cognitive reserve (CR) and BDNF Val66Met are independently associated with the rate of cognitive decline in preclinical Alzheimer's disease. This study was designed to investigate the interactive effects of these variables on 36-month cognitive change in cognitively intact older adults. Methods Data for this investigation were obtained from 445 community-residing participants of the Tasmanian Healthy Brain Project, who underwent genetic screening and annual assessment of neuropsychological, health, and psychosocial function. Results Our main result was that BDNF Val66Met moderated the relationship between baseline CR and change in executive function performance, in that CR-related differences in function decreased across the follow-up period in BDNF Val homozygotes, but became more pronounced in BDNF Met carriers. Similar effects were not observed within the other memory- and language-related cognitive domains. Discussion Inheritance of BDNF Met may be associated with a detrimental influence on the relationship between CR and cognitive change in cognitively intact older adults, but this effect may be restricted to the executive function domain.
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Affiliation(s)
- David D Ward
- Wicking Dementia Research & Education Centre, University of Tasmania, Hobart, Tasmania, Australia
| | - Ross Andel
- School of Aging Studies, University of South Florida, Tampa, FL, USA
| | - Nichole L Saunders
- Wicking Dementia Research & Education Centre, University of Tasmania, Hobart, Tasmania, Australia
| | - Megan E Thow
- Wicking Dementia Research & Education Centre, University of Tasmania, Hobart, Tasmania, Australia
| | - Shannon Z Klekociuk
- Wicking Dementia Research & Education Centre, University of Tasmania, Hobart, Tasmania, Australia
| | - Aidan D Bindoff
- Wicking Dementia Research & Education Centre, University of Tasmania, Hobart, Tasmania, Australia
| | - James C Vickers
- Wicking Dementia Research & Education Centre, University of Tasmania, Hobart, Tasmania, Australia
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Sapkota S, Bäckman L, Dixon RA. Executive function performance and change in aging is predicted by apolipoprotein E, intensified by catechol-O-methyltransferase and brain-derived neurotrophic factor, and moderated by age and lifestyle. Neurobiol Aging 2017; 52:81-89. [PMID: 28131014 DOI: 10.1016/j.neurobiolaging.2016.12.022] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Revised: 12/15/2016] [Accepted: 12/24/2016] [Indexed: 11/26/2022]
Abstract
Recent studies have reported several genetic, health, and aging interaction effects in predicting cognitive performance and change. We used an accelerated longitudinal design to examine interactions among genetic, lifestyle, and aging for executive function (EF) in non-demented older adults (n = 634; age range = 53-95 years). The polymorphisms were apolipoprotein E (APOE), catechol-O-methyltransferase (COMT), and brain-derived neurotrophic factor (BDNF). We tested (1) independent and additive effects of APOE, COMT, and BDNF and (2) APOE effect modification for COMT + BDNF, on EF performance and 9-year change as separated by age and lifestyle activities. First, APOE ε4+ carriers had poorer EF performance and steeper 9-year decline. Second, APOE ε4+ carriers with (1) BDNF Met/Met genotype and (2) increasing allelic risk in the COMT + BDNF risk panel had poorer EF performance; these effects were moderated by lifestyle activities (composite of everyday social, physical, and cognitive activities). Examining APOE effect modification for COMT + BDNF risk panel effects with other moderating factors may help identify complex neurobiological and genetic underpinnings of polygenic phenotypes such as EF in aging.
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Affiliation(s)
- Shraddha Sapkota
- Neuroscience and Mental Health Institute, University of Alberta, Edmonton, Canada
| | - Lars Bäckman
- Aging Research Center, Karolinska Institutet, Stockholm, Sweden
| | - Roger A Dixon
- Neuroscience and Mental Health Institute, University of Alberta, Edmonton, Canada; Department of Psychology, University of Alberta, Edmonton, Canada.
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36
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Lin CH, Lin E, Lane HY. Genetic Biomarkers on Age-Related Cognitive Decline. Front Psychiatry 2017; 8:247. [PMID: 29209239 PMCID: PMC5702307 DOI: 10.3389/fpsyt.2017.00247] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 11/07/2017] [Indexed: 12/29/2022] Open
Abstract
With ever-increasing elder populations, age-related cognitive decline, which is characterized as a gradual decline in cognitive capacity in the aging process, has turned out to be a mammoth public health concern. Since genetic information has become increasingly important to explore the biological mechanisms of cognitive decline, the search for genetic biomarkers of cognitive aging has received much attention. There is growing evidence that single-nucleotide polymorphisms (SNPs) within the ADAMTS9, BDNF, CASS4, COMT, CR1, DNMT3A, DTNBP1, REST, SRR, TOMM40, circadian clock, and Alzheimer's diseases-associated genes may contribute to susceptibility to cognitive aging. In this review, we first illustrated evidence of the genetic contribution to disease susceptibility to age-related cognitive decline in recent studies ranging from approaches of candidate genes to genome-wide association studies. We then surveyed a variety of association studies regarding age-related cognitive decline with consideration of gene-gene and gene-environment interactions. Finally, we highlighted their limitations and future directions. In light of advances in precision medicine and multi-omics technologies, future research in genomic medicine promises to lead to innovative ideas that are relevant to disease prevention and novel drugs for cognitive aging.
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Affiliation(s)
- Chieh-Hsin Lin
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan.,Department of Psychiatry, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan.,Center for General Education, Cheng Shiu University, Kaohsiung, Taiwan
| | - Eugene Lin
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan.,Department of Electrical Engineering, University of Washington, Seattle, WA, United States.,TickleFish Systems Corporation, Seattle, WA, United States
| | - Hsien-Yuan Lane
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan.,Department of Psychiatry, Brain Disease Research Center, China Medical University Hospital, Taichung, Taiwan
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Imlach AR, Ward DD, Stuart KE, Summers MJ, Valenzuela MJ, King AE, Saunders NL, Summers J, Srikanth VK, Robinson A, Vickers JC. Age is no barrier: predictors of academic success in older learners. NPJ SCIENCE OF LEARNING 2017; 2:13. [PMID: 30631459 PMCID: PMC6161509 DOI: 10.1038/s41539-017-0014-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Revised: 10/04/2017] [Accepted: 10/16/2017] [Indexed: 05/18/2023]
Abstract
Although predictors of academic success have been identified in young adults, such predictors are unlikely to translate directly to an older student population, where such information is scarce. The current study aimed to examine cognitive, psychosocial, lifetime, and genetic predictors of university-level academic performance in older adults (50-79 years old). Participants were mostly female (71%) and had a greater than high school education level (M = 14.06 years, SD = 2.76), on average. Two multiple linear regression analyses were conducted. The first examined all potential predictors of grade point average (GPA) in the subset of participants who had volunteered samples for genetic analysis (N = 181). Significant predictors of GPA were then re-examined in a second multiple linear regression using the full sample (N = 329). Our data show that the cognitive domains of episodic memory and language processing, in conjunction with midlife engagement in cognitively stimulating activities, have a role in predicting academic performance as measured by GPA in the first year of study. In contrast, it was determined that age, IQ, gender, working memory, psychosocial factors, and common brain gene polymorphisms linked to brain function, plasticity and degeneration (APOE, BDNF, COMT, KIBRA, SERT) did not influence academic performance. These findings demonstrate that ageing does not impede academic achievement, and that discrete cognitive skills as well as lifetime engagement in cognitively stimulating activities can promote academic success in older adults.
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Affiliation(s)
- Abbie-Rose Imlach
- Wicking Dementia Research & Education Centre, University of Tasmania, Hobart, Australia
| | - David D. Ward
- Wicking Dementia Research & Education Centre, University of Tasmania, Hobart, Australia
- Population Health Sciences, Deutsches Zentrum für Neurodegenerative Erkrankungen, Bonn, Germany
| | - Kimberley E. Stuart
- Wicking Dementia Research & Education Centre, University of Tasmania, Hobart, Australia
| | - Mathew J. Summers
- Wicking Dementia Research & Education Centre, University of Tasmania, Hobart, Australia
- Sunshine Coast Mind and Neuroscience - Thompson Institute, University of the Sunshine Coast, Birtinya, Australia
| | - Michael J. Valenzuela
- Regenerative Neuroscience Group, Brain and Mind Research Institute, University of Sydney, Camperdown, Australia
| | - Anna E. King
- Wicking Dementia Research & Education Centre, University of Tasmania, Hobart, Australia
| | - Nichole L. Saunders
- Wicking Dementia Research & Education Centre, University of Tasmania, Hobart, Australia
| | - Jeffrey Summers
- University of Tasmania, Hobart, Australia
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK
| | - Velandai K. Srikanth
- Peninsula Clinical School, Central Clinical School, Monash University, Melbourne, Australia
- Department of Medicine, Peninsula Health, Melbourne, Australia
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia
| | - Andrew Robinson
- Wicking Dementia Research & Education Centre, University of Tasmania, Hobart, Australia
| | - James C. Vickers
- Wicking Dementia Research & Education Centre, University of Tasmania, Hobart, Australia
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Correa DD, Satagopan J, Cheung K, Arora AK, Kryza-Lacombe M, Xu Y, Karimi S, Lyo J, DeAngelis LM, Orlow I. COMT, BDNF, and DTNBP1 polymorphisms and cognitive functions in patients with brain tumors. Neuro Oncol 2016; 18:1425-33. [PMID: 27091610 PMCID: PMC5035520 DOI: 10.1093/neuonc/now057] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Accepted: 03/11/2016] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Cognitive dysfunction is common among patients with brain tumors and can be associated with the disease and treatment with radiotherapy and chemotherapy. However, little is known about genetic risk factors that may moderate the vulnerability for developing cognitive dysfunction. In this study, we examined the association of single nucleotide polymorphisms (SNPs) in the catechol-O-methyl transferase (COMT), brain-derived neurotrophic factor (BDNF), and dystrobrevin-binding protein 1 (DTNBP1) genes with cognitive functions and neuroimaging outcomes in patients with brain tumors. METHODS One hundred and fifty patients with brain tumors completed neuropsychological tests of attention, executive functions, and memory and were genotyped for polymorphisms in the COMT, BDNF, and DTNBP1 genes. Ratings of white matter (WM) abnormalities on magnetic resonance imaging scans were performed. RESULTS Multivariate regression shrinkage analyses, adjusted for age, education, treatment type, time since treatment completion, and tumor location, indicated a significant association between the COMT SNP rs4680 (Val158Met) and memory with lower scores in delayed recall (P < .01) among homozygotes (valine/valine). Additional COMT, BDNF and DTNBP1 SNPs were significantly associated with attention, executive functions, and memory scores. CONCLUSION This is the first study to suggest that known and newly described polymorphisms in genes associated with executive and memory functions in healthy individuals and other clinical populations may modulate cognitive outcome in patients with brain tumors.
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Affiliation(s)
- Denise D Correa
- Department of Neurology, Memorial Sloan Kettering Cancer Center, New York, New York (D.D.C., M.K.-L., L.M.D.); Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, New York (J.S., K.C., A.K.A., Y.X., I.O.); Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York (S.K., J.L.); Department of Neurology and Neuroscience, Weill Cornell Medical College, New York, New York (D.D.C., L.M.D.)
| | - Jaya Satagopan
- Department of Neurology, Memorial Sloan Kettering Cancer Center, New York, New York (D.D.C., M.K.-L., L.M.D.); Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, New York (J.S., K.C., A.K.A., Y.X., I.O.); Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York (S.K., J.L.); Department of Neurology and Neuroscience, Weill Cornell Medical College, New York, New York (D.D.C., L.M.D.)
| | - Kenneth Cheung
- Department of Neurology, Memorial Sloan Kettering Cancer Center, New York, New York (D.D.C., M.K.-L., L.M.D.); Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, New York (J.S., K.C., A.K.A., Y.X., I.O.); Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York (S.K., J.L.); Department of Neurology and Neuroscience, Weill Cornell Medical College, New York, New York (D.D.C., L.M.D.)
| | - Arshi K Arora
- Department of Neurology, Memorial Sloan Kettering Cancer Center, New York, New York (D.D.C., M.K.-L., L.M.D.); Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, New York (J.S., K.C., A.K.A., Y.X., I.O.); Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York (S.K., J.L.); Department of Neurology and Neuroscience, Weill Cornell Medical College, New York, New York (D.D.C., L.M.D.)
| | - Maria Kryza-Lacombe
- Department of Neurology, Memorial Sloan Kettering Cancer Center, New York, New York (D.D.C., M.K.-L., L.M.D.); Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, New York (J.S., K.C., A.K.A., Y.X., I.O.); Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York (S.K., J.L.); Department of Neurology and Neuroscience, Weill Cornell Medical College, New York, New York (D.D.C., L.M.D.)
| | - Youming Xu
- Department of Neurology, Memorial Sloan Kettering Cancer Center, New York, New York (D.D.C., M.K.-L., L.M.D.); Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, New York (J.S., K.C., A.K.A., Y.X., I.O.); Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York (S.K., J.L.); Department of Neurology and Neuroscience, Weill Cornell Medical College, New York, New York (D.D.C., L.M.D.)
| | - Sasan Karimi
- Department of Neurology, Memorial Sloan Kettering Cancer Center, New York, New York (D.D.C., M.K.-L., L.M.D.); Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, New York (J.S., K.C., A.K.A., Y.X., I.O.); Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York (S.K., J.L.); Department of Neurology and Neuroscience, Weill Cornell Medical College, New York, New York (D.D.C., L.M.D.)
| | - John Lyo
- Department of Neurology, Memorial Sloan Kettering Cancer Center, New York, New York (D.D.C., M.K.-L., L.M.D.); Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, New York (J.S., K.C., A.K.A., Y.X., I.O.); Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York (S.K., J.L.); Department of Neurology and Neuroscience, Weill Cornell Medical College, New York, New York (D.D.C., L.M.D.)
| | - Lisa M DeAngelis
- Department of Neurology, Memorial Sloan Kettering Cancer Center, New York, New York (D.D.C., M.K.-L., L.M.D.); Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, New York (J.S., K.C., A.K.A., Y.X., I.O.); Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York (S.K., J.L.); Department of Neurology and Neuroscience, Weill Cornell Medical College, New York, New York (D.D.C., L.M.D.)
| | - Irene Orlow
- Department of Neurology, Memorial Sloan Kettering Cancer Center, New York, New York (D.D.C., M.K.-L., L.M.D.); Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, New York (J.S., K.C., A.K.A., Y.X., I.O.); Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York (S.K., J.L.); Department of Neurology and Neuroscience, Weill Cornell Medical College, New York, New York (D.D.C., L.M.D.)
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Petkus AJ, Reynolds CA, Wetherell JL, Kremen WS, Pedersen NL, Gatz M. Anxiety is associated with increased risk of dementia in older Swedish twins. Alzheimers Dement 2016; 12:399-406. [PMID: 26549599 PMCID: PMC4841698 DOI: 10.1016/j.jalz.2015.09.008] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Revised: 08/24/2015] [Accepted: 09/25/2015] [Indexed: 01/25/2023]
Abstract
INTRODUCTION We asked whether anxiety is associated with prospective risk of dementia, and the extent to which genetic influences mediate this association. METHODS Nondemented twins (n = 1082) from the Swedish Adoption Twin Study of Aging completed an assessment of anxiety symptoms in 1984 and were followed for 28 years. RESULTS Baseline anxiety score, independent of depressive symptoms, was significantly associated with incident dementia over follow-up (hazard ratio [HR] = 1.04; 95% confidence interval [CI] = 1.01-1.06). There was 48% increased risk of becoming demented for those who had experienced high anxiety at any time compared with those who had not. In co-twin analyses, the association between anxiety symptoms and dementia was greater for dizygotic (HR = 1.11; 95% CI = 1.02-1.20) compared with monozygotic twins (HR = 1.06; 95% CI = 0.95-1.20), indicating genetic mediation. DISCUSSION Anxiety symptoms were associated with increased risk of dementia. Genetic factors common to dementia and anxiety partially mediated this association.
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Affiliation(s)
| | | | | | - William S. Kremen
- University of California, San Diego, CA
- VA Center of Excellence for Stress and Mental Health, San Diego, CA
| | - Nancy L. Pedersen
- University of Southern California, Los Angeles, CA
- Karolinska Institutet, Stockholm, Sweden
| | - Margaret Gatz
- University of Southern California, Los Angeles, CA
- Karolinska Institutet, Stockholm, Sweden
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Gomar JJ, Conejero-Goldberg C, Huey ED, Davies P, Goldberg TE. Lack of neural compensatory mechanisms of BDNF val66met met carriers and APOE E4 carriers in healthy aging, mild cognitive impairment, and Alzheimer's disease. Neurobiol Aging 2016; 39:165-73. [PMID: 26923413 PMCID: PMC9969539 DOI: 10.1016/j.neurobiolaging.2015.12.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 11/02/2015] [Accepted: 12/14/2015] [Indexed: 02/01/2023]
Abstract
Compromises in compensatory neurobiologic mechanisms due to aging and/or genetic factors (i.e., APOE gene) may influence brain-derived neurotrophic factor (BDNF) val66met polymorphism effects on temporal lobe morphometry and memory performance. We studied 2 cohorts from Alzheimer's Disease Neuroimaging Initiative: 175 healthy subjects and 222 with prodromal and established Alzheimer's disease. Yearly structural magnetic resonance imaging and cognitive performance assessments were carried out over 3 years of follow-up. Both cohorts had similar BDNF Val/Val and Met allele carriers' (including both Val/Met and Met/Met individuals) distribution. In healthy subjects, a significant trend for thinner posterior cingulate and precuneus cortices was detected in Met carriers compared to Val homozygotes in APOE E4 carriers, with large and medium effect sizes, respectively. The mild cognitive impairment/Alzheimer's disease cohort showed a longitudinal decline in entorhinal thickness in BDNF Met carriers compared to Val/Val in APOE E4 carriers, with effect sizes ranging from medium to large. In addition, an effect of BDNF genotype was found in APOE E4 carriers for episodic memory (logical memory and ADAS-Cog) and semantic fluency measures, with Met carriers performing worse in all cases. These findings suggest a lack of compensatory mechanisms in BDNF Met carriers and APOE E4 carriers in healthy and pathological aging.
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Affiliation(s)
- Jesus J. Gomar
- The Litwin-Zucker Research Center, The Feinstein Institute for Medical Research, Manhasset, NY, USA,FIDMAG Hermanas Hospitalarias Research Foundation & CIBERSAM, Sant Boi de Llobregat, Spain
| | | | - Edward D. Huey
- Taub Institute for Research on Alzheimer’s disease and the Aging Brain, The Gertrude H. Sergievsky Center, Columbia University, New York, NY, USA,College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Peter Davies
- The Litwin-Zucker Research Center, The Feinstein Institute for Medical Research, Manhasset, NY, USA,Hofstra North Shore LIJ School of Medicine, Hempstead, NY, USA
| | - Terry E. Goldberg
- The Litwin-Zucker Research Center, The Feinstein Institute for Medical Research, Manhasset, NY, USA,Hofstra North Shore LIJ School of Medicine, Hempstead, NY, USA,Corresponding author and request for reprints: Terry E. Goldberg, 350 Community Drive, Manhasset, NY 11030, USA. Telephone: 516-562- 0410.Fax: 516-562-0401.
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Tromp D, Dufour A, Lithfous S, Pebayle T, Després O. Episodic memory in normal aging and Alzheimer disease: Insights from imaging and behavioral studies. Ageing Res Rev 2015; 24:232-62. [PMID: 26318058 DOI: 10.1016/j.arr.2015.08.006] [Citation(s) in RCA: 201] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 08/20/2015] [Indexed: 12/30/2022]
Abstract
Age-related cognitive changes often include difficulties in retrieving memories, particularly those that rely on personal experiences within their temporal and spatial contexts (i.e., episodic memories). This decline may vary depending on the studied phase (i.e., encoding, storage or retrieval), according to inter-individual differences, and whether we are talking about normal or pathological (e.g., Alzheimer disease; AD) aging. Such cognitive changes are associated with different structural and functional alterations in the human neural network that underpins episodic memory. The prefrontal cortex is the first structure to be affected by age, followed by the medial temporal lobe (MTL), the parietal cortex and the cerebellum. In AD, however, the modifications occur mainly in the MTL (hippocampus and adjacent structures) before spreading to the neocortex. In this review, we will present results that attempt to characterize normal and pathological cognitive aging at multiple levels by integrating structural, behavioral, inter-individual and neuroimaging measures of episodic memory.
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Affiliation(s)
- D Tromp
- Laboratoire de Neurosciences Cognitives et Adaptatives (LNCA - UMR 7364 - CNRS/UDS) - 21 rue Becquerel, 67087 Strasbourg, France.
| | - A Dufour
- Laboratoire de Neurosciences Cognitives et Adaptatives (LNCA - UMR 7364 - CNRS/UDS) - 21 rue Becquerel, 67087 Strasbourg, France; Centre d'Investigations Neurocognitives et Neurophysiologiques (CI2N - UMS 3489 - CNRS/UDS) - 21 rue Becquerel, 67087 Strasbourg, France
| | - S Lithfous
- Laboratoire de Neurosciences Cognitives et Adaptatives (LNCA - UMR 7364 - CNRS/UDS) - 21 rue Becquerel, 67087 Strasbourg, France
| | - T Pebayle
- Centre d'Investigations Neurocognitives et Neurophysiologiques (CI2N - UMS 3489 - CNRS/UDS) - 21 rue Becquerel, 67087 Strasbourg, France
| | - O Després
- Laboratoire de Neurosciences Cognitives et Adaptatives (LNCA - UMR 7364 - CNRS/UDS) - 21 rue Becquerel, 67087 Strasbourg, France.
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The GAB2 and BDNF polymorphisms and the risk for late-onset Alzheimer's disease in an elderly Brazilian sample. Int Psychogeriatr 2015; 27:1687-92. [PMID: 25853819 DOI: 10.1017/s1041610215000514] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Evidences suggest that GAB2 and BDNF genes may be associated with Alzheimer's disease (AD). We aimed to investigate the GAB2 rs2373115 and BDNF rs6265 polymorphisms and the risk of AD in a Brazilian sample. METHODS 269 AD patients and 114 controls were genotyped with Real-time PCR. Multifactor dimensionality reduction (MDR) was employed to explore the effects of gene-gene interactions. RESULTS GAB2 and BDNF were not associated with AD in our sample. Nevertheless BDNF Val allele (rs6265) presented a synergic association with the APOE ε4 allele. A multiple logistic regression demonstrated that the APOE ε4 allele and years of education were the best predictors for AD. In ε4 non-carriers sex, education and hypertension were independently correlated with AD, while in ε4 carriers we did not observe any association. The findings were further confirmed by bootstrapping method. CONCLUSIONS Our data suggest that the interaction of BDNF and APOE has significant effect on AD. Moreover in absence of ε4, female sex, low level of education and hypertension are independently associated with AD. Interventions aimed to prevent AD should focus on these factors and also taking into account the APOE alleles.
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Wollam ME, Weinstein AM, Saxton JA, Morrow L, Snitz B, Fowler NR, Suever Erickson BL, Roecklein KA, Erickson KI. Genetic Risk Score Predicts Late-Life Cognitive Impairment. J Aging Res 2015; 2015:267062. [PMID: 26366299 PMCID: PMC4561094 DOI: 10.1155/2015/267062] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Revised: 07/18/2015] [Accepted: 07/26/2015] [Indexed: 12/18/2022] Open
Abstract
Introduction. A family history of Alzheimer's disease is a significant risk factor for its onset, but the genetic risk associated with possessing multiple risk alleles is still poorly understood. Methods. In a sample of 95 older adults (Mean age = 75.1, 64.2% female), we constructed a genetic risk score based on the accumulation of risk alleles in BDNF, COMT, and APOE. A neuropsychological evaluation and consensus determined cognitive status (44 nonimpaired, 51 impaired). Logistic regression was performed to determine whether the genetic risk score predicted cognitive impairment above and beyond that associated with each gene. Results. An increased genetic risk score was associated with a nearly 4-fold increased risk of cognitive impairment (OR = 3.824, P = .013) when including the individual gene polymorphisms as covariates in the model. Discussion. A risk score combining multiple genetic influences may be more useful in predicting late-life cognitive impairment than individual polymorphisms.
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Affiliation(s)
- Mariegold E. Wollam
- Department of Psychology, University of Pittsburgh, Sennott Square, 3rd Floor, 210 South Bouquet Street, Pittsburgh, PA 15260, USA
| | - Andrea M. Weinstein
- Department of Psychology, University of Pittsburgh, Sennott Square, 3rd Floor, 210 South Bouquet Street, Pittsburgh, PA 15260, USA
- Center for the Neural Basis of Cognition, University of Pittsburgh, 4400 Fifth Avenue, Suite 115, Pittsburgh, PA 15213, USA
| | - Judith A. Saxton
- Department of Neurology, University of Pittsburgh, 811 Kaufmann Medical Building, 3471 Fifth Avenue, Pittsburgh, PA 15213, USA
| | - Lisa Morrow
- Department of Psychiatry, University of Pittsburgh, Thomas Detre Hall, 3811 O'Hara Street, Pittsburgh, PA 15213, USA
| | - Beth Snitz
- Department of Neurology, University of Pittsburgh, 811 Kaufmann Medical Building, 3471 Fifth Avenue, Pittsburgh, PA 15213, USA
| | - Nicole R. Fowler
- Division of General Internal Medicine and Geriatrics, Indiana University, Fifth Third Faculty Building, 720 Eskenazi Avenue, Indianapolis, IN 46202, USA
| | - Barbara L. Suever Erickson
- Department of Psychology, University of Pittsburgh, Sennott Square, 3rd Floor, 210 South Bouquet Street, Pittsburgh, PA 15260, USA
| | - Kathryn A. Roecklein
- Department of Psychology, University of Pittsburgh, Sennott Square, 3rd Floor, 210 South Bouquet Street, Pittsburgh, PA 15260, USA
- Center for the Neural Basis of Cognition, University of Pittsburgh, 4400 Fifth Avenue, Suite 115, Pittsburgh, PA 15213, USA
| | - Kirk I. Erickson
- Department of Psychology, University of Pittsburgh, Sennott Square, 3rd Floor, 210 South Bouquet Street, Pittsburgh, PA 15260, USA
- Center for the Neural Basis of Cognition, University of Pittsburgh, 4400 Fifth Avenue, Suite 115, Pittsburgh, PA 15213, USA
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The BDNF Val66Met polymorphism moderates the relationship between cognitive reserve and executive function. Transl Psychiatry 2015; 5:e590. [PMID: 26125153 PMCID: PMC4490292 DOI: 10.1038/tp.2015.82] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Revised: 03/25/2015] [Accepted: 05/21/2015] [Indexed: 01/01/2023] Open
Abstract
The concept of cognitive reserve (CR) has been proposed to account for observed discrepancies between pathology and its clinical manifestation due to underlying differences in brain structure and function. In 433 healthy older adults participating in the Tasmanian Healthy Brain Project, we investigated whether common polymorphic variations in apolipoprotein E (APOE) or brain-derived neurotrophic factor (BDNF) influenced the association between CR contributors and cognitive function in older adults. We show that BDNF Val66Met moderates the association between CR and executive function. CR accounted for 8.5% of the variance in executive function in BDNF Val homozygotes, but CR was a nonsignificant predictor in BDNF Met carriers. APOE polymorphisms were not linked to the influence of CR on cognitive function. This result implicates BDNF in having an important role in capacity for building or accessing CR.
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Liu Y, Zhou R, Sulman EP, Scheurer ME, Boehling N, Armstrong GN, Tsavachidis S, Liang FW, Etzel CJ, Conrad CA, Gilbert MR, Armstrong TS, Bondy ML, Wefel JS. Genetic Modulation of Neurocognitive Function in Glioma Patients. Clin Cancer Res 2015; 21:3340-6. [PMID: 25904748 DOI: 10.1158/1078-0432.ccr-15-0168] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Accepted: 04/06/2015] [Indexed: 11/16/2022]
Abstract
PURPOSE Accumulating evidence supports the contention that genetic variation is associated with neurocognitive function in healthy individuals and increased risk for neurocognitive decline in a variety of patient populations, including cancer patients. However, this has rarely been studied in glioma patients. EXPERIMENTAL DESIGN To identify the effect of genetic variants on neurocognitive function, we examined the relationship between the genotype frequencies of 10,967 single-nucleotide polymorphisms in 580 genes related to five pathways (inflammation, DNA repair, metabolism, cognitive, and telomerase) and neurocognitive function in 233 newly diagnosed glioma patients before surgical resection. Four neuropsychologic tests that measured memory (Hopkins Verbal Learning Test-Revised), processing speed (Trail Making Test A), and executive function (Trail Making Test B, Controlled Oral Word Association) were examined. RESULTS Eighteen polymorphisms were associated with processing speed and 12 polymorphisms with executive function. For processing speed, the strongest signals were in IRS1 rs6725330 in the inflammation pathway (P = 2.5 × 10(-10)), ERCC4 rs1573638 in the DNA repair pathway (P = 3.4 × 10(-7)), and ABCC1 rs8187858 in metabolism pathway (P = 6.6 × 10(-7)). For executive function, the strongest associations were in NOS1 rs11611788 (P = 1.8 × 10(-8)) and IL16 rs1912124 (P = 6.0 × 10(-7)) in the inflammation pathway, and POLE rs5744761 (P = 6.0 × 10(-7)) in the DNA repair pathway. Joint effect analysis found significant gene polymorphism-dosage effects for processing speed (Ptrend = 9.4 × 10(-16)) and executive function (Ptrend = 6.6 × 10(-15)). CONCLUSIONS Polymorphisms in inflammation, DNA repair, and metabolism pathways are associated with neurocognitive function in glioma patients and may affect clinical outcomes.
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Affiliation(s)
- Yanhong Liu
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, Texas. Department of Pediatrics, Baylor College of Medicine, Houston, Texas
| | - Renke Zhou
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, Texas
| | - Erik P Sulman
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Michael E Scheurer
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, Texas. Department of Pediatrics, Baylor College of Medicine, Houston, Texas
| | - Nicholas Boehling
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | | | | | - Fu-Wen Liang
- Institute of Public Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Carol J Etzel
- Biostatistics, Corrona, LLC, Southborough, Massachusetts
| | - Charles A Conrad
- Department of Neuro-Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Mark R Gilbert
- Center for Cancer Research, National Cancer Institute, Bethesda, Maryland
| | - Terri S Armstrong
- The University of Texas Health Science Center School of Nursing, Houston, Texas
| | - Melissa L Bondy
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, Texas. Department of Pediatrics, Baylor College of Medicine, Houston, Texas.
| | - Jeffrey S Wefel
- Department of Neuro-Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas.
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Kennedy KM, Reese ED, Horn MM, Sizemore AN, Unni AK, Meerbrey ME, Kalich AG, Rodrigue KM. BDNF val66met polymorphism affects aging of multiple types of memory. Brain Res 2014; 1612:104-17. [PMID: 25264352 DOI: 10.1016/j.brainres.2014.09.044] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Revised: 09/15/2014] [Accepted: 09/19/2014] [Indexed: 11/18/2022]
Abstract
The BDNF val66met polymorphism (rs6265) influences activity-dependent secretion of brain-derived neurotrophic factor in the synapse, which is crucial for learning and memory. Individuals homozygous or heterozygous for the met allele have lower BDNF secretion than val homozygotes and may be at risk for reduced declarative memory performance, but it remains unclear which types of declarative memory may be affected and how aging of memory across the lifespan is impacted by the BDNF val66met polymorphism. This cross-sectional study investigated the effects of BDNF polymorphism on multiple indices of memory (item, associative, prospective, subjective complaints) in a lifespan sample of 116 healthy adults aged 20-93 years. Advancing age showed a negative effect on item, associative and prospective memory, but not on subjective memory complaints. For item and prospective memory, there were significant age×BDNF group interactions, indicating the adverse effect of age on memory performance across the lifespan was much stronger in the BDNF met carriers than for the val homozygotes. BDNF met carriers also endorsed significantly greater subjective memory complaints, regardless of age, and showed a trend (p<.07) toward poorer associative memory performance compared to val homozygotes. These results suggest that genetic predisposition to the availability of brain-derived neurotrophic factor, by way of the BDNF val66met polymorphism, exerts an influence on multiple indices of episodic memory - in some cases in all individuals regardless of age (subjective memory and perhaps associative memory), in others as an exacerbation of age-related differences in memory across the lifespan (item and prospective memory). This article is part of a Special Issue entitled Memory & Aging.
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Affiliation(s)
- Kristen M Kennedy
- Center for Vital Longevity, School of Behavioral and Brain Sciences, The University of Texas at Dallas, 1600 Viceroy Dr., Ste 800, Dallas, TX 75235, United States.
| | - Elizabeth D Reese
- Center for Vital Longevity, School of Behavioral and Brain Sciences, The University of Texas at Dallas, 1600 Viceroy Dr., Ste 800, Dallas, TX 75235, United States
| | - Marci M Horn
- Center for Vital Longevity, School of Behavioral and Brain Sciences, The University of Texas at Dallas, 1600 Viceroy Dr., Ste 800, Dallas, TX 75235, United States
| | - April N Sizemore
- Center for Vital Longevity, School of Behavioral and Brain Sciences, The University of Texas at Dallas, 1600 Viceroy Dr., Ste 800, Dallas, TX 75235, United States
| | - Asha K Unni
- Center for Vital Longevity, School of Behavioral and Brain Sciences, The University of Texas at Dallas, 1600 Viceroy Dr., Ste 800, Dallas, TX 75235, United States
| | - Michael E Meerbrey
- Center for Vital Longevity, School of Behavioral and Brain Sciences, The University of Texas at Dallas, 1600 Viceroy Dr., Ste 800, Dallas, TX 75235, United States
| | - Allan G Kalich
- Center for Vital Longevity, School of Behavioral and Brain Sciences, The University of Texas at Dallas, 1600 Viceroy Dr., Ste 800, Dallas, TX 75235, United States
| | - Karen M Rodrigue
- Center for Vital Longevity, School of Behavioral and Brain Sciences, The University of Texas at Dallas, 1600 Viceroy Dr., Ste 800, Dallas, TX 75235, United States
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