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Chong JR, Chai YL, Xing H, Herr DR, Wenk MR, Francis PT, Ballard C, Aarsland D, Silver DL, Chen CP, Cazenave‐Gassiot A, Lai MKP. Decreased DHA-containing phospholipids in the neocortex of dementia with Lewy bodies are associated with soluble Aβ 42 , phosphorylated α-synuclein, and synaptopathology. Brain Pathol 2023; 33:e13190. [PMID: 37463072 PMCID: PMC10580008 DOI: 10.1111/bpa.13190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Accepted: 07/03/2023] [Indexed: 07/20/2023] Open
Abstract
Docosahexaenoic acid (DHA) is an essential omega-3 polyunsaturated fatty acid implicated in cognitive functions by promoting synaptic protein expression. While alterations of specific DHA-containing phospholipids have been described in the neocortex of patients with Alzheimer's disease (AD), the status of these lipids in dementia with Lewy bodies (DLB), known to manifest aggregated α-synuclein-containing Lewy bodies together with variable amyloid pathology, is unclear. In this study, post-mortem samples from the parietal cortex of 25 DLB patients and 17 age-matched controls were processed for phospholipidomics analyses using a liquid chromatography-tandem mass spectrometry (LC-MS/MS) platform. After controlling for false discovery rate, six out of the 46 identified putative DHA-phospholipid species were significantly decreased in DLB, with only one showing increase. Altered putative DHA-phospholipid species were subsequently validated with further LC-MS/MS measurements. Of the DHA-containing phospholipid (DCP) species showing decreases, five negatively correlated with soluble beta-amyloid (Aβ42) levels, whilst three also correlated with phosphorylated α-synuclein (all p < 0.05). Furthermore, five of these phospholipid species correlated with deficits of presynaptic Rab3A, postsynaptic neurogranin, or both (all p < 0.05). Finally, we found altered immunoreactivities of brain lysolipid DHA transporter, MFSD2A, and the fatty acid binding protein FABP5 in DLB parietal cortex. In summary, we report alterations of specific DCP species in DLB, as well as their associations with markers of neuropathological burden and synaptopathology. These results support the potential role of DHA perturbations in DLB as well as therapeutic targets.
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Affiliation(s)
- Joyce R. Chong
- Department of PharmacologyYong Loo Lin School of Medicine, National University of SingaporeKent RidgeSingapore
- Memory, Aging and Cognition CentreNational University Health SystemKent RidgeSingapore
| | - Yuek Ling Chai
- Department of PharmacologyYong Loo Lin School of Medicine, National University of SingaporeKent RidgeSingapore
- Memory, Aging and Cognition CentreNational University Health SystemKent RidgeSingapore
| | - Huayang Xing
- Department of PharmacologyYong Loo Lin School of Medicine, National University of SingaporeKent RidgeSingapore
| | - Deron R. Herr
- Department of PharmacologyYong Loo Lin School of Medicine, National University of SingaporeKent RidgeSingapore
| | - Markus R. Wenk
- Department of BiochemistryYong Loo Lin School of Medicine, National University of SingaporeKent RidgeSingapore
- Singapore Lipidomics Incubator (SLING), Life Sciences InstituteNational University of SingaporeKent RidgeSingapore
| | | | - Clive Ballard
- College of Medicine and HealthUniversity of ExeterExeterUK
| | - Dag Aarsland
- Department of Old Age PsychiatryInstitute of Psychiatry, Psychology and Neuroscience, King's College LondonLondonUK
- Centre for Age‐Related MedicineStavanger University HospitalStavangerNorway
| | - David L. Silver
- Signature Research Program in Cardiovascular and Metabolic DisordersDuke‐National University of Singapore (NUS) Medical SchoolOutramSingapore
| | - Christopher P. Chen
- Department of PharmacologyYong Loo Lin School of Medicine, National University of SingaporeKent RidgeSingapore
- Memory, Aging and Cognition CentreNational University Health SystemKent RidgeSingapore
| | - Amaury Cazenave‐Gassiot
- Department of BiochemistryYong Loo Lin School of Medicine, National University of SingaporeKent RidgeSingapore
- Singapore Lipidomics Incubator (SLING), Life Sciences InstituteNational University of SingaporeKent RidgeSingapore
| | - Mitchell K. P. Lai
- Department of PharmacologyYong Loo Lin School of Medicine, National University of SingaporeKent RidgeSingapore
- Memory, Aging and Cognition CentreNational University Health SystemKent RidgeSingapore
- College of Medicine and HealthUniversity of ExeterExeterUK
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Chai YL, Lee JH, Chong JR, Ballard C, Francis PT, Kennedy BK, Arumugam TV, Chen CP, Aarsland D, Lai MKP. Inflammatory panel cytokines are elevated in the neocortex of late-stage Alzheimer's disease but not Lewy body dementias. J Neuroinflammation 2023; 20:111. [PMID: 37158957 PMCID: PMC10169342 DOI: 10.1186/s12974-023-02789-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 04/24/2023] [Indexed: 05/10/2023] Open
Abstract
BACKGROUND Chronically dysregulated neuroinflammation has been implicated in neurodegenerative dementias, with separate studies reporting increased brain levels of inflammatory mediators and gliosis in Alzheimer's disease (AD) as well as in Lewy body dementias (LBD). However, it is unclear whether the nature and extent of neuroinflammatory responses in LBD are comparable to those in AD. In this study, we performed head-to-head measurements of a panel of cytokines in the post-mortem neocortex of AD versus the two major clinical subtypes of LBD, namely, dementia with Lewy bodies (DLB) and Parkinson's disease dementia (PDD). METHODS Post-mortem tissues from the mid-temporal cortex (Brodmann area 21) of a cohort of neuropathologically well-defined AD, PDD and DLB patients were processed and measured for a comprehensive range of cytokines (IL-1α, IL-1Ra, IL-8, IL-10, IL-12p70, IL-13, IFN-γ, GM-CSF and FGF-2) using a multiplex immunoassay platform. Associations between inflammation markers and neuropathological measures of neuritic plaques, neurofibrillary tangles as well as Lewy bodies were also performed. RESULTS We found IL-1α, IFN-γ, GM-CSF and IL-13 to be elevated in the mid-temporal cortex of AD patients. In contrast, none of the measured cytokines were significantly altered in either DLB or PDD. Similar cytokine changes were observed in two other neocortical areas of AD patients. Furthermore, increases of IL-1α, IFN-γ, GM-CSF, IL-10 and IL-13 associated with moderate-to-severe neurofibrillary tangle burden, but not with neuritic plaques or Lewy bodies. Our findings of elevated neocortical pro- and anti-inflammatory cytokines in AD, but not in DLB or PDD, suggest that neuroinflammatory responses are strongly linked to neurofibrillary tangle burden, which is higher in AD compared to LBD. In conclusion, neuroinflammation may not play a prominent role in the pathophysiology of late-stage LBD.
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Affiliation(s)
- Yuek Ling Chai
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore
- Memory, Ageing and Cognition Centre, National University Health System, Singapore, Singapore
| | - Jasinda H Lee
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- NUS Healthy Longevity Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Joyce R Chong
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore
- Memory, Ageing and Cognition Centre, National University Health System, Singapore, Singapore
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Clive Ballard
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
- University of Exeter Medical School, Exeter, UK
| | | | - Brian K Kennedy
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- NUS Healthy Longevity Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Thiruma V Arumugam
- Department of Microbiology, Anatomy, Physiology and Pharmacology, School of Agriculture, Biomedicine and Environment, La Trobe University, Bundoora, VIC, Australia
| | - Christopher P Chen
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore
- Memory, Ageing and Cognition Centre, National University Health System, Singapore, Singapore
- NUS Healthy Longevity Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Dag Aarsland
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
- Centre for Age-Related Medicine, Stavanger University Hospital, Stavanger, Norway
| | - Mitchell K P Lai
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore.
- Memory, Ageing and Cognition Centre, National University Health System, Singapore, Singapore.
- NUS Healthy Longevity Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
- University of Exeter Medical School, Exeter, UK.
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Wheildon G, Smith AR, Soanes D, Smith RG, Moore K, O'Neill P, Morgan K, Thomas AJ, Francis PT, Love S, Mill J, Pishva E, Lunnon K. Targeted bisulfite sequencing analysis of candidate genes associated with Alzheimer’s disease. Alzheimers Dement 2022. [DOI: 10.1002/alz.067703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
| | | | | | | | | | | | - Kevin Morgan
- University of Nottingham Nottingham United Kingdom
| | - Alan J Thomas
- Translational and Clinical Research Institute, Newcastle University Newcastle upon Tyne United Kingdom
| | | | - Seth Love
- University of Bristol Bristol United Kingdom
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Varughese A, Kavitha R, Sravan Kumar Y, Venkitachalam R, Menon AS, Francis PT, Haridas K. Prevalence and severity of coronal and radicular caries among patients with type 2 diabetes mellitus: A cross sectional study. Med J Armed Forces India 2022; 78:S179-S185. [PMID: 36147423 PMCID: PMC9485771 DOI: 10.1016/j.mjafi.2020.09.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 09/29/2020] [Indexed: 11/22/2022] Open
Abstract
Background Studies among type 2 diabetes mellitus patients have reported total caries experience; however the severity and clinical consequences of untreated dental caries are often ignored. Methods For this study, 150 well (I) and poorly controlled (II) diabetic participants were recruited. The spectrum of caries was evaluated using DMFT (Decayed, Missing and Filled Tooth) index, Dental Caries Severity Classification Scale, PUFA (Pulpal involvement, Ulceration, Fistula and Abscess) index, RCI (Root Caries Index) and the severity of radicular caries by Root Surface Caries Severity Index. Results The prevalence of coronal and root caries was 90.7% and 23.3%, respectively. There was significant difference among caries experiences for D, M and DMFT. In group II, severity of coronal caries and mean rank of P, F, A and PUFA scores were higher, so were prevalence of root caries and severity of RD2, RD3 and RD4. HbA1c level had positive correlation with DMFT and PUFA scores (r = 0.458 and 0.522), so was the duration of diabetes with coronal caries, DMFT, PUFA score, root caries and RCI score (r = 0.235, 0.320, 0.273, 0.308 and 0.323). Conclusion This is probably the first study to examine the severity of coronal caries, prevalence of untreated dental caries and severity of radicular caries in diabetic patients. Uncontrolled diabetes causes substantial increase in prevalence and severity of coronal and radicular caries.
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Affiliation(s)
- Anju Varughese
- Assistant Professor (Conservative Dentistry & Endodontics), Amrita School of Dentistry, Amrita Vishwa Vidyapeetam, AIMS, Kochi, Kerala, India
| | - R. Kavitha
- Assistant Professor (Conservative Dentistry & Endodontics), Amrita School of Dentistry, Amrita Vishwa Vidyapeetam, AIMS, Kochi, Kerala, India
| | - Y. Sravan Kumar
- Assistant Professor (Public Health Dentistry), Amrita School of Dentistry, Amrita Vishwa Vidyapeetam, AIMS, Kochi, Kerala, India
| | - R. Venkitachalam
- Assistant Professor (Public Health Dentistry), Amrita School of Dentistry, Amrita Vishwa Vidyapeetam, AIMS, Kochi, Kerala, India
| | - Arun S. Menon
- Professor (Endocrinology), Amrita Institute of Medical Sciences and Research Centre, Amrita Vishwa Vidyapeetam, AIMS, Kochi, Kerala, India
| | - Paul T. Francis
- Associate Professor (Community Medicine), Amrita Institute of Medical Sciences and Research Centre, Amrita Vishwa Vidyapeetam, AIMS, Kochi, Kerala, India
| | - Kaushik Haridas
- Assistant Professor (Conservative Dentistry & Endodontics), Amrita School of Dentistry, Amrita Vishwa Vidyapeetam, AIMS, Kochi, Kerala, India
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Chua XY, Chong JR, Cheng AL, Lee JH, Ballard C, Aarsland D, Francis PT, Lai MKP. Elevation of inactive cleaved annexin A1 in the neocortex is associated with amyloid, inflammatory and apoptotic markers in neurodegenerative dementias. Neurochem Int 2022; 152:105251. [PMID: 34861326 DOI: 10.1016/j.neuint.2021.105251] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 10/25/2021] [Accepted: 11/27/2021] [Indexed: 12/25/2022]
Abstract
Inflammation is usually a tightly regulated process whose termination by mediators including Annexin A1 (AnxA1) results in the resolution of inflammatory responses. In neurodegenerative dementias, chronic neuroinflammation, along with accumulation of aggregated β-amyloid (Aβ) peptides and apoptosis, has long been recognized to be a pathological hallmark; but it is unclear whether a failure of inflammation resolution contributes to this pathophysiological process. In this study, we measured AnxA1 immunoreactivities in postmortem neocortex (Brodmann areas BA9 and BA40) of well characterized Alzheimer's disease (AD), Parkinson disease dementia (PDD) and dementia with Lewy bodies (DLB) patients as well as aged controls. Inactive cleaved AnxA1 was found to be elevated in AD and DLB in BA40. Levels of cleaved AnxA1 also positively correlated with amyloidogenic brain Aβ, anti-inflammatory markers such as IL10 and IL13, as well as with the pro-apoptotic marker cleaved caspase-3 in BA40. Our findings suggest that elevated cleaved AnxA1 in neurodegenerative dementias may reflect a failure of inflammation resolution in certain regions of the diseased brain, and also support a mechanistic link between AnxA1 and amyloid pathology, neuroinflammation and apoptosis.
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Affiliation(s)
- Xin Ying Chua
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Kent Ridge, Singapore
| | - Joyce R Chong
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Kent Ridge, Singapore; Memory, Aging and Cognition Centre, National University Health System, Kent Ridge, Singapore
| | - Ai Ling Cheng
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Kent Ridge, Singapore
| | - Jasinda H Lee
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Kent Ridge, Singapore
| | - Clive Ballard
- College of Medicine and Health, University of Exeter, Exeter, UK
| | - Dag Aarsland
- Centre for Age-Related Medicine (SESAM), Stavanger University Hospital, Stavanger, Norway; Department of Old Age Psychiatry, Institute of Psychiatry, Psychology, and Neuroscience, King's College London, London, UK
| | - Paul T Francis
- College of Medicine and Health, University of Exeter, Exeter, UK
| | - Mitchell K P Lai
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Kent Ridge, Singapore; Memory, Aging and Cognition Centre, National University Health System, Kent Ridge, Singapore; College of Medicine and Health, University of Exeter, Exeter, UK.
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Alić I, Goh PA, Murray A, Portelius E, Gkanatsiou E, Gough G, Mok KY, Koschut D, Brunmeir R, Yeap YJ, O'Brien NL, Groet J, Shao X, Havlicek S, Dunn NR, Kvartsberg H, Brinkmalm G, Hithersay R, Startin C, Hamburg S, Phillips M, Pervushin K, Turmaine M, Wallon D, Rovelet-Lecrux A, Soininen H, Volpi E, Martin JE, Foo JN, Becker DL, Rostagno A, Ghiso J, Krsnik Ž, Šimić G, Kostović I, Mitrečić D, Francis PT, Blennow K, Strydom A, Hardy J, Zetterberg H, Nižetić D. Patient-specific Alzheimer-like pathology in trisomy 21 cerebral organoids reveals BACE2 as a gene dose-sensitive AD suppressor in human brain. Mol Psychiatry 2021; 26:5766-5788. [PMID: 32647257 PMCID: PMC8190957 DOI: 10.1038/s41380-020-0806-5] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 05/18/2020] [Accepted: 05/29/2020] [Indexed: 11/15/2022]
Abstract
A population of more than six million people worldwide at high risk of Alzheimer's disease (AD) are those with Down Syndrome (DS, caused by trisomy 21 (T21)), 70% of whom develop dementia during lifetime, caused by an extra copy of β-amyloid-(Aβ)-precursor-protein gene. We report AD-like pathology in cerebral organoids grown in vitro from non-invasively sampled strands of hair from 71% of DS donors. The pathology consisted of extracellular diffuse and fibrillar Aβ deposits, hyperphosphorylated/pathologically conformed Tau, and premature neuronal loss. Presence/absence of AD-like pathology was donor-specific (reproducible between individual organoids/iPSC lines/experiments). Pathology could be triggered in pathology-negative T21 organoids by CRISPR/Cas9-mediated elimination of the third copy of chromosome 21 gene BACE2, but prevented by combined chemical β and γ-secretase inhibition. We found that T21 organoids secrete increased proportions of Aβ-preventing (Aβ1-19) and Aβ-degradation products (Aβ1-20 and Aβ1-34). We show these profiles mirror in cerebrospinal fluid of people with DS. We demonstrate that this protective mechanism is mediated by BACE2-trisomy and cross-inhibited by clinically trialled BACE1 inhibitors. Combined, our data prove the physiological role of BACE2 as a dose-sensitive AD-suppressor gene, potentially explaining the dementia delay in ~30% of people with DS. We also show that DS cerebral organoids could be explored as pre-morbid AD-risk population detector and a system for hypothesis-free drug screens as well as identification of natural suppressor genes for neurodegenerative diseases.
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Grants
- MR/S011277/1 Medical Research Council
- MR/L501542/1 Medical Research Council
- G-0907 Parkinson's UK
- MR/N026004/1 Medical Research Council
- MR/R024901/1 Medical Research Council
- Wellcome Trust
- 217199 Wellcome Trust
- G0901254 Medical Research Council
- MR/T002581/1 Medical Research Council
- RF1 AG059695 NIA NIH HHS
- G0701075 Medical Research Council
- 098330 Wellcome Trust
- William Harvey Academy Fellowship, co-funded by the People Programme (Marie Curie Actions) of the European Union’s Seventh Framework Programme (FP7/2007-2013) under REA grant agreement n° 608765
- Fondation pour la Recherche Médicale (Foundation for Medical Research in France)
- National Research Foundation Singapore (National Research Foundation-Prime Minister’s office, Republic of Singapore)
- BrightFocus Foundation (BrightFocus)
- Foundation for the National Institutes of Health (Foundation for the National Institutes of Health, Inc.)
- Svenska Forskningsrådet Formas (Swedish Research Council Formas)
- KB holds the Torsten Söderberg Professorship in Medicine at the Royal Swedish Academy of Sciences, and is supported by the Swedish Alzheimer Foundation (#AF-742881), Hjärnfonden, Sweden (#FO2017-0243), and the Swedish State Support for Clinical Research (#ALFGBG-715986).
- Wellcome Trust (Wellcome)
- JH received funding from the Dementia Research Institute, an anonymous foundation and the Dolby foundation
- HZ is a Wallenberg Academy Fellow supported by grants from the Swedish Research Council, the European Research Council, Swedish State Support for Clinical Research (ALFGBG-720931) the UK Dementia Research Institute at UCL
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Affiliation(s)
- Ivan Alić
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, 308232, Singapore
- The Blizard Institute, Barts & The London School of Medicine, Queen Mary University of London, London, E1 2AT, UK
- Department of Anatomy, Histology and Embryology, Faculty of Veterinary Medicine, University of Zagreb, 10000, Zagreb, Croatia
| | - Pollyanna A Goh
- The Blizard Institute, Barts & The London School of Medicine, Queen Mary University of London, London, E1 2AT, UK
- LonDownS Consortium, London, UK
| | - Aoife Murray
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, 308232, Singapore
| | - Erik Portelius
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, S-405 30, Sweden
| | - Eleni Gkanatsiou
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, S-405 30, Sweden
| | - Gillian Gough
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, 308232, Singapore
| | - Kin Y Mok
- LonDownS Consortium, London, UK
- Dementia Research Institute & Reta Lila Weston Institute, Institute of Neurology, University College London, London, WC1N 3BG, UK
| | - David Koschut
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, 308232, Singapore
| | - Reinhard Brunmeir
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, 308232, Singapore
| | - Yee Jie Yeap
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, 308232, Singapore
| | - Niamh L O'Brien
- The Blizard Institute, Barts & The London School of Medicine, Queen Mary University of London, London, E1 2AT, UK
- LonDownS Consortium, London, UK
| | - Jürgen Groet
- The Blizard Institute, Barts & The London School of Medicine, Queen Mary University of London, London, E1 2AT, UK
- LonDownS Consortium, London, UK
| | - Xiaowei Shao
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, 308232, Singapore
| | - Steven Havlicek
- Genome Institute of Singapore, Agency for Science, Technology and Research (A*STAR), Singapore, 138672, Singapore
| | - N Ray Dunn
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, 308232, Singapore
- Institute of Medical Biology, Agency for Science, Technology and Research (A*STAR), Singapore, 138648, Singapore
| | - Hlin Kvartsberg
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, S-405 30, Sweden
| | - Gunnar Brinkmalm
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, S-405 30, Sweden
| | - Rosalyn Hithersay
- LonDownS Consortium, London, UK
- Division of Psychiatry, University College London, London, WC1E 6BT, UK
- Department of Forensic and Neurodevelopmental Sciences, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, SE5 8AF, UK
| | - Carla Startin
- LonDownS Consortium, London, UK
- Division of Psychiatry, University College London, London, WC1E 6BT, UK
| | - Sarah Hamburg
- LonDownS Consortium, London, UK
- Division of Psychiatry, University College London, London, WC1E 6BT, UK
| | - Margaret Phillips
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | - Konstantin Pervushin
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | - Mark Turmaine
- Division of Biosciences, University College London, Gower Street, London, WC1E 6BT, UK
| | - David Wallon
- Normandie Univ, UNIROUEN, Inserm U1245 and Rouen University Hospital, Department of Neurology and CNR-MAJ, F 76000, Normandy Center for Genomic and Personalized Medicine, Rouen, France
| | - Anne Rovelet-Lecrux
- Normandie Univ, UNIROUEN, Inserm U1245 and Rouen University Hospital, Department of Neurology and CNR-MAJ, F 76000, Normandy Center for Genomic and Personalized Medicine, Rouen, France
| | - Hilkka Soininen
- University of Eastern Finland, Institute of Clinical Medicine/Neurology, Kuopio, FI-70211, Finland
| | - Emanuela Volpi
- School of Life Sciences, University of Westminster, London, W1W 6UW, UK
| | - Joanne E Martin
- The Blizard Institute, Barts & The London School of Medicine, Queen Mary University of London, London, E1 2AT, UK
| | - Jia Nee Foo
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, 308232, Singapore
- Genome Institute of Singapore, Agency for Science, Technology and Research (A*STAR), Singapore, 138672, Singapore
| | - David L Becker
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, 308232, Singapore
| | - Agueda Rostagno
- Department of Pathology & Department of Psychiatry, New York University School of Medicine, New York, NY, 10016, USA
| | - Jorge Ghiso
- Department of Pathology & Department of Psychiatry, New York University School of Medicine, New York, NY, 10016, USA
| | - Željka Krsnik
- Croatian Institute for Brain Research, School of Medicine, University of Zagreb, 10000, Zagreb, Croatia
| | - Goran Šimić
- Croatian Institute for Brain Research, School of Medicine, University of Zagreb, 10000, Zagreb, Croatia
| | - Ivica Kostović
- Croatian Institute for Brain Research, School of Medicine, University of Zagreb, 10000, Zagreb, Croatia
| | - Dinko Mitrečić
- Croatian Institute for Brain Research, School of Medicine, University of Zagreb, 10000, Zagreb, Croatia
| | - Paul T Francis
- Wolfson Centre for Age-Related Diseases, King's College London, London, SE1 1UL, UK
| | - Kaj Blennow
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, S-405 30, Sweden
| | - Andre Strydom
- LonDownS Consortium, London, UK
- Division of Psychiatry, University College London, London, WC1E 6BT, UK
- Department of Forensic and Neurodevelopmental Sciences, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, SE5 8AF, UK
| | - John Hardy
- LonDownS Consortium, London, UK
- Dementia Research Institute & Reta Lila Weston Institute, Institute of Neurology, University College London, London, WC1N 3BG, UK
| | - Henrik Zetterberg
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, S-405 30, Sweden
- Dementia Research Institute & Reta Lila Weston Institute, Institute of Neurology, University College London, London, WC1N 3BG, UK
| | - Dean Nižetić
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, 308232, Singapore.
- The Blizard Institute, Barts & The London School of Medicine, Queen Mary University of London, London, E1 2AT, UK.
- LonDownS Consortium, London, UK.
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Francis PT. Language Barrier in Anganwadis in Eranakulam, Kerala. Indian Pediatr 2021; 58:793-794. [PMID: 34465665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Affiliation(s)
- Paul T Francis
- Department of Community Medicine, Amrita Institute of Medical Sciences, Ponekkara, Kochi, Kerala.
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8
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Francis PT. Language Barrier in Anganwadis in Eranakulam, Kerala. Indian Pediatr 2021. [DOI: 10.1007/s13312-021-2294-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Smith RG, Pishva E, Shireby G, Smith AR, Roubroeks JAY, Hannon E, Wheildon G, Mastroeni D, Gasparoni G, Riemenschneider M, Giese A, Sharp AJ, Schalkwyk L, Haroutunian V, Viechtbauer W, van den Hove DLA, Weedon M, Brokaw D, Francis PT, Thomas AJ, Love S, Morgan K, Walter J, Coleman PD, Bennett DA, De Jager PL, Mill J, Lunnon K. A meta-analysis of epigenome-wide association studies in Alzheimer's disease highlights novel differentially methylated loci across cortex. Nat Commun 2021; 12:3517. [PMID: 34112773 PMCID: PMC8192929 DOI: 10.1038/s41467-021-23243-4] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 04/16/2021] [Indexed: 01/01/2023] Open
Abstract
Epigenome-wide association studies of Alzheimer's disease have highlighted neuropathology-associated DNA methylation differences, although existing studies have been limited in sample size and utilized different brain regions. Here, we combine data from six DNA methylomic studies of Alzheimer's disease (N = 1453 unique individuals) to identify differential methylation associated with Braak stage in different brain regions and across cortex. We identify 236 CpGs in the prefrontal cortex, 95 CpGs in the temporal gyrus and ten CpGs in the entorhinal cortex at Bonferroni significance, with none in the cerebellum. Our cross-cortex meta-analysis (N = 1408 donors) identifies 220 CpGs associated with neuropathology, annotated to 121 genes, of which 84 genes have not been previously reported at this significance threshold. We have replicated our findings using two further DNA methylomic datasets consisting of a further >600 unique donors. The meta-analysis summary statistics are available in our online data resource ( www.epigenomicslab.com/ad-meta-analysis/ ).
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Affiliation(s)
- Rebecca G Smith
- University of Exeter Medical School, College of Medicine and Health, University of Exeter, Exeter, UK
| | - Ehsan Pishva
- University of Exeter Medical School, College of Medicine and Health, University of Exeter, Exeter, UK
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience (MHeNS), Maastricht University, Maastricht, The Netherlands
| | - Gemma Shireby
- University of Exeter Medical School, College of Medicine and Health, University of Exeter, Exeter, UK
| | - Adam R Smith
- University of Exeter Medical School, College of Medicine and Health, University of Exeter, Exeter, UK
| | - Janou A Y Roubroeks
- University of Exeter Medical School, College of Medicine and Health, University of Exeter, Exeter, UK
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience (MHeNS), Maastricht University, Maastricht, The Netherlands
| | - Eilis Hannon
- University of Exeter Medical School, College of Medicine and Health, University of Exeter, Exeter, UK
| | - Gregory Wheildon
- University of Exeter Medical School, College of Medicine and Health, University of Exeter, Exeter, UK
| | - Diego Mastroeni
- Banner ASU Neurodegenerative Research Center, Biodesign Institute, Arizona State University, Tempe, AZ, USA
| | - Gilles Gasparoni
- Department of Genetics, University of Saarland (UdS), Saarbruecken, Germany
| | - Matthias Riemenschneider
- Department of Psychiatry and Psychotherapy, Saarland University Hospital (UKS), Homburg, Germany
| | - Armin Giese
- Center for Neuropathology and Prion Research, Ludwig-Maximilians-University (LMU), Munich, Germany
| | - Andrew J Sharp
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | | | - Vahram Haroutunian
- Department of Psychiatry, The Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Neuroscience, The Icahn School of Medicine at Mount Sinai, New York, NY, USA
- JJ Peters VA Medical Center, Bronx, NY, USA
| | - Wolfgang Viechtbauer
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience (MHeNS), Maastricht University, Maastricht, The Netherlands
| | - Daniel L A van den Hove
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience (MHeNS), Maastricht University, Maastricht, The Netherlands
- Laboratory of Translational Neuroscience, Department of Psychiatry, Psychosomatics and Psychotherapy, University of Wuerzburg, Würzburg, Germany
| | - Michael Weedon
- University of Exeter Medical School, College of Medicine and Health, University of Exeter, Exeter, UK
| | - Danielle Brokaw
- Banner ASU Neurodegenerative Research Center, Biodesign Institute, Arizona State University, Tempe, AZ, USA
| | - Paul T Francis
- University of Exeter Medical School, College of Medicine and Health, University of Exeter, Exeter, UK
| | - Alan J Thomas
- Institute of Neuroscience, Newcastle University, Newcastle Upon Tyne, UK
| | - Seth Love
- Dementia Research Group, Institute of Clinical Neurosciences, School of Clinical Sciences, University of Bristol, Bristol, UK
| | - Kevin Morgan
- Human Genetics Group, University of Nottingham, Nottingham, UK
| | - Jörn Walter
- Department of Genetics, University of Saarland (UdS), Saarbruecken, Germany
| | - Paul D Coleman
- Banner ASU Neurodegenerative Research Center, Biodesign Institute, Arizona State University, Tempe, AZ, USA
| | - David A Bennett
- Rush Alzheimer's Disease Center, Rush University Medical Center, Chicago, IL, USA
| | - Philip L De Jager
- Center for Translational and Computational Neuroimmunology, Department of Neurology and Taub Institute, Columbia University Medical Center, New York, NY, USA
- The Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Jonathan Mill
- University of Exeter Medical School, College of Medicine and Health, University of Exeter, Exeter, UK
| | - Katie Lunnon
- University of Exeter Medical School, College of Medicine and Health, University of Exeter, Exeter, UK.
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10
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McAleese KE, Colloby SJ, Thomas AJ, Al-Sarraj S, Ansorge O, Neal J, Roncaroli F, Love S, Francis PT, Attems J. Concomitant neurodegenerative pathologies contribute to the transition from mild cognitive impairment to dementia. Alzheimers Dement 2021; 17:1121-1133. [PMID: 33663011 DOI: 10.1002/alz.12291] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 10/31/2020] [Accepted: 12/22/2020] [Indexed: 12/14/2022]
Abstract
INTRODUCTION The aged brain frequently exhibits multiple pathologies, rather than a single hallmark pathology (pure pathology [PurP]), ranging from low/intermediate levels of additional pathology (LowP) to mixed severe pathology (mixed SevP). We investigated the frequency of PurP, LowP, and mixed SevP, and the impact of additional LowP on cognition. METHODS Data came from 670 cases from the Brains for Dementia research program. Cases were categorized into PurP, mixed SevP, or a main disease with additional LowP; 508 cases had a clinical dementia rating. RESULTS 69.9% of cases had LowP, 22.7% had PurP, and 7.5% had mixed SevP. Additional LowP increased the likelihood of having mild dementia versus mild cognitive impairment (MCI) by almost 20-fold (odds ratio = 19.5). DISCUSSION Most aged individuals have multiple brain pathologies. The presence of one additional LowP can significantly worsen cognitive decline, increasing the risk of transitioning from MCI to dementia 20-fold. Multimorbidity should be considered in dementia research and clinical studies.
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Affiliation(s)
- Kirsty E McAleese
- Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, UK
| | - Sean J Colloby
- Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, UK
| | - Alan J Thomas
- Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, UK
| | - Safa Al-Sarraj
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Olaf Ansorge
- Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, UK
| | - James Neal
- Department of Cellular Pathology, University Hospital of Wales, Cardiff, UK
| | - Federico Roncaroli
- Division of Neuroscience & Experimental Psychology, Faculty of Biology, Medicine and Health, Manchester University, Manchester, UK and Manchester Centre for Clinical Neuroscience, Salford Royal Foundation Trust, Salford, UK
| | - Seth Love
- Bristol Medical School, University of Bristol, Bristol, UK
| | - Paul T Francis
- Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK.,College of Medicine and Health, University of Exeter, Exeter, UK
| | - Johannes Attems
- Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, UK
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11
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Low CYB, Lee JH, Lim FTW, Lee C, Ballard C, Francis PT, Lai MKP, Tan MGK. Isoform-specific upregulation of FynT kinase expression is associated with tauopathy and glial activation in Alzheimer's disease and Lewy body dementias. Brain Pathol 2021; 31:253-266. [PMID: 33128789 PMCID: PMC8017997 DOI: 10.1111/bpa.12917] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Revised: 09/26/2020] [Accepted: 10/27/2020] [Indexed: 02/06/2023] Open
Abstract
Cumulative data suggest the involvement of Fyn tyrosine kinase in Alzheimer's disease (AD). Previously, our group has shown increased immunoreactivities of the FynT isoform in AD neocortex (with no change in the alternatively spliced FynB isoform) which associated with neurofibrillary degeneration and reactive astrogliosis. Since both the aforementioned neuropathological features are also variably found in Lewy Body dementias (LBD), we investigated potential perturbations of Fyn expression in the post-mortem neocortex of patients with AD, as well as those diagnosed as having one of the two main subgroups of LBD: Parkinson's disease dementia (PDD) and dementia with Lewy bodies (DLB). We found selective upregulation of FynT expression in AD, PDD, and DLB which also correlated with cognitive impairment. Furthermore, increased FynT expression correlated with hallmark neuropathological lesions, soluble β-amyloid, and phosphorylated tau, as well as markers of microglia and astrocyte activation. In line with the human post-mortem studies, cortical FynT expression in aged mice transgenic for human P301S tau was upregulated and further correlated with accumulation of aggregated phosphorylated tau as well as with microglial and astrocytic markers. Our findings provide further evidence for the involvement of FynT in neurodegenerative dementias, likely via effects on tauopathy and neuroinflammation.
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Affiliation(s)
- Clara Y. B. Low
- Department of Clinical Translational ResearchSingapore General HospitalOutramSingapore
| | - Jasinda H. Lee
- Department of PharmacologyYong Loo Lin School of MedicineKent RidgeSingapore
| | - Frances T. W. Lim
- Department of Clinical Translational ResearchSingapore General HospitalOutramSingapore
| | - Chingli Lee
- Department of Clinical Translational ResearchSingapore General HospitalOutramSingapore
| | - Clive Ballard
- Institute for Health ResearchUniversity of Exeter Medical SchoolExeterUK
| | - Paul T. Francis
- Institute for Health ResearchUniversity of Exeter Medical SchoolExeterUK
- Wolfson Centre for Age‐Related DiseasesKing's College LondonLondonUK
| | - Mitchell K. P. Lai
- Department of PharmacologyYong Loo Lin School of MedicineKent RidgeSingapore
- Institute for Health ResearchUniversity of Exeter Medical SchoolExeterUK
- Wolfson Centre for Age‐Related DiseasesKing's College LondonLondonUK
| | - Michelle G. K. Tan
- Department of Clinical Translational ResearchSingapore General HospitalOutramSingapore
- Department of PharmacologyYong Loo Lin School of MedicineKent RidgeSingapore
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12
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Shireby GL, Davies JP, Francis PT, Burrage J, Walker EM, Neilson GWA, Dahir A, Thomas AJ, Love S, Smith RG, Lunnon K, Kumari M, Schalkwyk LC, Morgan K, Brookes K, Hannon E, Mill J. Recalibrating the epigenetic clock: implications for assessing biological age in the human cortex. Brain 2021; 143:3763-3775. [PMID: 33300551 PMCID: PMC7805794 DOI: 10.1093/brain/awaa334] [Citation(s) in RCA: 72] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 08/06/2020] [Accepted: 08/07/2020] [Indexed: 12/14/2022] Open
Abstract
Human DNA methylation data have been used to develop biomarkers of ageing, referred to as ‘epigenetic clocks’, which have been widely used to identify differences between chronological age and biological age in health and disease including neurodegeneration, dementia and other brain phenotypes. Existing DNA methylation clocks have been shown to be highly accurate in blood but are less precise when used in older samples or in tissue types not included in training the model, including brain. We aimed to develop a novel epigenetic clock that performs optimally in human cortex tissue and has the potential to identify phenotypes associated with biological ageing in the brain. We generated an extensive dataset of human cortex DNA methylation data spanning the life course (n = 1397, ages = 1 to 108 years). This dataset was split into ‘training’ and ‘testing’ samples (training: n = 1047; testing: n = 350). DNA methylation age estimators were derived using a transformed version of chronological age on DNA methylation at specific sites using elastic net regression, a supervised machine learning method. The cortical clock was subsequently validated in a novel independent human cortex dataset (n = 1221, ages = 41 to 104 years) and tested for specificity in a large whole blood dataset (n = 1175, ages = 28 to 98 years). We identified a set of 347 DNA methylation sites that, in combination, optimally predict age in the human cortex. The sum of DNA methylation levels at these sites weighted by their regression coefficients provide the cortical DNA methylation clock age estimate. The novel clock dramatically outperformed previously reported clocks in additional cortical datasets. Our findings suggest that previous associations between predicted DNA methylation age and neurodegenerative phenotypes might represent false positives resulting from clocks not robustly calibrated to the tissue being tested and for phenotypes that become manifest in older ages. The age distribution and tissue type of samples included in training datasets need to be considered when building and applying epigenetic clock algorithms to human epidemiological or disease cohorts.
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Affiliation(s)
- Gemma L Shireby
- University of Exeter Medical School, University of Exeter, Exeter, UK
| | - Jonathan P Davies
- University of Exeter Medical School, University of Exeter, Exeter, UK
| | - Paul T Francis
- University of Exeter Medical School, University of Exeter, Exeter, UK.,Wolfson Centre for Age-Related Diseases, King's College London, London, UK
| | - Joe Burrage
- University of Exeter Medical School, University of Exeter, Exeter, UK
| | - Emma M Walker
- University of Exeter Medical School, University of Exeter, Exeter, UK
| | - Grant W A Neilson
- University of Exeter Medical School, University of Exeter, Exeter, UK
| | - Aisha Dahir
- University of Exeter Medical School, University of Exeter, Exeter, UK
| | - Alan J Thomas
- Translational and Clinical Research Institute, Newcastle University, Newcastle Upon Tyne, UK
| | - Seth Love
- Dementia Research Group, Institute of Clinical Neurosciences, School of Clinical Sciences, University of Bristol, Bristol, UK
| | - Rebecca G Smith
- University of Exeter Medical School, University of Exeter, Exeter, UK
| | - Katie Lunnon
- University of Exeter Medical School, University of Exeter, Exeter, UK
| | - Meena Kumari
- Institute for Social and Economic Research, University of Essex, Colchester, UK
| | | | - Kevin Morgan
- Human Genetics, School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Keeley Brookes
- School of Science and Technology, Nottingham Trent University, Nottingham, UK
| | - Eilis Hannon
- University of Exeter Medical School, University of Exeter, Exeter, UK
| | - Jonathan Mill
- University of Exeter Medical School, University of Exeter, Exeter, UK
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13
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Alakbarzade V, French JMR, Howlett DR, Attems J, Francis PT, Stratton S, Clark CN, Pereira AC, Hainsworth AH. Cerebral amyloid angiopathy distribution in older people: A cautionary note. Alzheimers Dement (N Y) 2021; 7:e12145. [PMID: 33644295 PMCID: PMC7885797 DOI: 10.1002/trc2.12145] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 12/03/2020] [Accepted: 01/06/2021] [Indexed: 12/26/2022]
Abstract
INTRODUCTION Radiolabeled ligands for fibrillar amyloid beta (Aβ) peptides are used in positron emission tomography (PET) for dementia diagnosis. Current ligands do not discriminate parenchymal amyloid plaques from cerebral amyloid angiopathy (CAA). METHODS We undertook neuropathological examination of 65 older people (81.6 ± 7.96 (mean ± SD) years, 27F/38M): 15 with neuropathological diagnosis of AD, 25 with neuropathological diagnosis of other neurodegenerative dementias (Lewy body dementia and Parkinson disease dementia), and 25 without significant neurodegenerative pathology. RESULTS We observed CAA in non-Alzheimer's dementia (non-AD dementia) and control brains, of comparable extent to those with neuropathologically confirmed AD. Aβ-positive vessel density did not differ significantly between non-AD dementia and control groups. Across all subjects there was a highly significant correlation between vessel Aβ40 density and vessel Aβ42 density (Spearman rho = 0.855, P < .001). CAA was absent or sparse in subcortical white matter across all patient groups. CONCLUSION Our data indicate that CAA can be abundant in non-AD brains and raise a cautionary note regarding interpretation of amyloid PET imaging.
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14
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Wasserman D, Bindman D, Nesbitt AD, Cash D, Milosevic M, Francis PT, Chaudhuri KR, Leschziner GD, Ferini-Strambi L, Ballard C, Eccles A, Rosenzweig I. Striatal Dopaminergic Deficit and Sleep in Idiopathic Rapid Eye Movement Behaviour Disorder: An Explorative Study. Nat Sci Sleep 2021; 13:1-9. [PMID: 33447113 PMCID: PMC7802085 DOI: 10.2147/nss.s267037] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 11/02/2020] [Indexed: 01/03/2023] Open
Abstract
INTRODUCTION Idiopathic rapid eye movement (REM) sleep behavior disorder (iRBD) is increasingly recognised as an important precursor disease state of alpha-synucleinopathies. This parasomnia is characterized by a history of recurrent nocturnal dream enactment behaviour, loss of skeletal muscle atonia, and increased phasic muscle activity during REM sleep. Neuroimaging studies of striatal dopamine transporter uptake tracer signaling suggest increasing dopaminergic deficit across the continuum of the alpha-synucleinopathies, with early sleep dysfunction suggestive of early caudate dysfunction. Henceforth, we set out to investigate the relationship between early sleep changes and the striatal dopaminergic availability in iRBD. METHODS Twelve patients with iRBD, who had undergone a video polysomnography and a neuroimaging assessment of striatal dopamine transporter (DaT) uptake tracer signaling, and 22 matched controls who had similarly undergone a video polysomnography were retrospectively identified. Data were statistically analyzed to identify altered sleep parameters and correlate them with striatal dopamine transporter uptake tracer signaling. RESULTS The iRBD patients exhibited an increased number of periodic limb movements during sleep (P=0.001), compared to 22 age-matched healthy subjects. In addition, several significant links were found between regional DaT-uptakes and sleep architecture. Correlational analyses suggested a strong positive association between sleep fragmentation and dopamine deficiency in left caudate (r=-0.630, P=0.028), whilst an increased uptake in the whole striatum was strongly linked to the sleep efficiency, and to a lesser degree to the length of sleep duration. DISCUSSION To the best of our knowledge, this is the first demonstration of a close relationship between dopaminergic availability in striatum and the quality of sleep in iRBD. Taken together, our exploratory findings suggest that subtle but functionally significant striatal changes in early stages of iRBD may contribute to the further shaping of sleep architecture.
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Affiliation(s)
- Danielle Wasserman
- Sleep and Brain Plasticity Centre, Department of Neuroimaging, Institute of Psychiatry, Psychology and Neuroscience (IoPPN), King's College London, London, UK.,Sleep Disorders Centre, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Dorothea Bindman
- Sleep and Brain Plasticity Centre, Department of Neuroimaging, Institute of Psychiatry, Psychology and Neuroscience (IoPPN), King's College London, London, UK
| | - Alexander D Nesbitt
- Sleep and Brain Plasticity Centre, Department of Neuroimaging, Institute of Psychiatry, Psychology and Neuroscience (IoPPN), King's College London, London, UK.,Sleep Disorders Centre, Guy's and St Thomas' NHS Foundation Trust, London, UK.,Headache Group, Department of Clinical Neurosciences, King's College Hospital NHS Foundation Trust, London, UK
| | - Diana Cash
- BRAIN, Department of Neuroimaging, King's College London, London, UK
| | - Milan Milosevic
- School of Public Health "Andrija Stampar", University of Zagreb School of Medicine, Zagreb, Croatia
| | - Paul T Francis
- Wolfson Centre for Age-Related Diseases, King's College London, London, UK
| | - K Ray Chaudhuri
- Movement Disorders Unit, King's College Hospital, Department of Clinical and Basic Neurosciences, Institute of Psychiatry, Psychology & Neuroscience, Parkinson Foundation Centre of Excellence, King's College London, London, UK
| | - Guy D Leschziner
- Sleep and Brain Plasticity Centre, Department of Neuroimaging, Institute of Psychiatry, Psychology and Neuroscience (IoPPN), King's College London, London, UK.,Sleep Disorders Centre, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Luigi Ferini-Strambi
- Sleep Disorders Center, Department of Clinical Neurosciences, Università Vita-Salute San Raffaele, Milan, Italy
| | | | - Amy Eccles
- Department of Nuclear Medicine, Guy's and St. Thomas' NHS Foundation Trust, London, UK
| | - Ivana Rosenzweig
- Sleep and Brain Plasticity Centre, Department of Neuroimaging, Institute of Psychiatry, Psychology and Neuroscience (IoPPN), King's College London, London, UK.,Sleep Disorders Centre, Guy's and St Thomas' NHS Foundation Trust, London, UK
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15
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Hannon E, Shireby GL, Brookes K, Attems J, Sims R, Cairns NJ, Love S, Thomas AJ, Morgan K, Francis PT, Mill J. Genetic risk for Alzheimer's disease influences neuropathology via multiple biological pathways. Brain Commun 2020; 2:fcaa167. [PMID: 33376986 PMCID: PMC7750986 DOI: 10.1093/braincomms/fcaa167] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 09/11/2020] [Accepted: 09/14/2020] [Indexed: 12/26/2022] Open
Abstract
Alzheimer’s disease is a highly heritable, common neurodegenerative disease characterized neuropathologically by the accumulation of β-amyloid plaques and tau-containing neurofibrillary tangles. In addition to the well-established risk associated with the APOE locus, there has been considerable success in identifying additional genetic variants associated with Alzheimer’s disease. Major challenges in understanding how genetic risk influences the development of Alzheimer’s disease are clinical and neuropathological heterogeneity, and the high level of accompanying comorbidities. We report a multimodal analysis integrating longitudinal clinical and cognitive assessment with neuropathological data collected as part of the Brains for Dementia Research study to understand how genetic risk factors for Alzheimer’s disease influence the development of neuropathology and clinical performance. Six hundred and ninety-three donors in the Brains for Dementia Research cohort with genetic data, semi-quantitative neuropathology measurements, cognitive assessments and established diagnostic criteria were included in this study. We tested the association of APOE genotype and Alzheimer’s disease polygenic risk score—a quantitative measure of genetic burden—with survival, four common neuropathological features in Alzheimer’s disease brains (neurofibrillary tangles, β-amyloid plaques, Lewy bodies and transactive response DNA-binding protein 43 proteinopathy), clinical status (clinical dementia rating) and cognitive performance (Mini-Mental State Exam, Montreal Cognitive Assessment). The APOE ε4 allele was significantly associated with younger age of death in the Brains for Dementia Research cohort. Our analyses of neuropathology highlighted two independent pathways from APOE ε4, one where β-amyloid accumulation co-occurs with the development of tauopathy, and a second characterized by direct effects on tauopathy independent of β-amyloidosis. Although we also detected association between APOE ε4 and dementia status and cognitive performance, these were all mediated by tauopathy, highlighting that they are a consequence of the neuropathological changes. Analyses of polygenic risk score identified associations with tauopathy and β-amyloidosis, which appeared to have both shared and unique contributions, suggesting that different genetic variants associated with Alzheimer’s disease affect different features of neuropathology to different degrees. Taken together, our results provide insight into how genetic risk for Alzheimer’s disease influences both the clinical and pathological features of dementia, increasing our understanding about the interplay between APOE genotype and other genetic risk factors.
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Affiliation(s)
- Eilis Hannon
- College of Medicine and Health, University of Exeter, Exeter, Devon, EX2 5DW, UK
| | - Gemma L Shireby
- College of Medicine and Health, University of Exeter, Exeter, Devon, EX2 5DW, UK
| | - Keeley Brookes
- School of Science & Technology, Nottingham Trent University, Nottingham, NG11 8NF, UK
| | - Johannes Attems
- Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - Rebecca Sims
- Division of Psychological Medicine and Clinical Neurosciences, School of Medicine, Cardiff University, Cardiff, CF24 4HQ, UK
| | - Nigel J Cairns
- College of Medicine and Health, University of Exeter, Exeter, Devon, EX2 5DW, UK
| | - Seth Love
- Bristol Medical School (THS), University of Bristol, Bristol, BS2 8DZ, UK
| | - Alan J Thomas
- Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - Kevin Morgan
- Human Genetics Group, School of Life Sciences, University of Nottingham, Nottingham, NG7 2RD, UK
| | - Paul T Francis
- College of Medicine and Health, University of Exeter, Exeter, Devon, EX2 5DW, UK
| | - Jonathan Mill
- College of Medicine and Health, University of Exeter, Exeter, Devon, EX2 5DW, UK
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16
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McAleese KE, Colloby SJ, Attems J, Thomas AJ, Francis PT. Mixed brain pathologies account for most dementia in the UK’s Brains for Dementia Research cohort. Alzheimers Dement 2020. [DOI: 10.1002/alz.043354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - Sean J. Colloby
- Translational and Clinical Research Institute Newcastle University Newcastle upon Tyne United Kingdom
| | | | - Alan J. Thomas
- Translational and Clinical Research Institute Newcastle University Newcastle upon Tyne United Kingdom
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17
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Hannon E, Shireby G, Brookes KJ, Neilson G, Dahir A, Walker E, Lunnon K, Love S, Thomas AJ, Morgan K, Francis PT, Mill J. An integrated epigenetic‐genetic study of neuropathology in the Brains for Dementia Research cohort. Alzheimers Dement 2020. [DOI: 10.1002/alz.043388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | | | | | | | | | | | | | - Seth Love
- University of Bristol Bristol United Kingdom
| | - Alan J. Thomas
- Translational and Clinical Research Institute Newcastle University Newcastle upon Tyne United Kingdom
| | - Kevin Morgan
- University of Nottingham Nottingham United Kingdom
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18
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Chua XY, Chong JR, Lee J, Attems J, Aarsland D, Francis PT, Lai MKP. Cleaved Annexin A1 is elevated in neurodegenerative dementia and is associated with pathological burden of amyloid and inflammatory cytokines. Alzheimers Dement 2020. [DOI: 10.1002/alz.037636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xin Ying Chua
- National University of Singapore, Singapore Singapore
| | - Joyce R. Chong
- Memory Aging and Cognition Center National University Health System, Singapore Singapore
| | - Jasinda Lee
- National University of Singapore, Singapore Singapore
| | | | - Dag Aarsland
- Institute of Psychiatry, Psychology & Neuroscience King's College London London United Kingdom
| | | | - Mitchell Kim Peng Lai
- Yong Loo Lin School of Medicine National University of Singapore, Singapore Singapore
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Hannon E, Brookes KJ, Shireby G, Attems J, Sims R, Cairns NJ, Morgan K, Thomas AJ, Francis PT, Mill J. Assessment of the contribution of common genetic variants associated with Alzheimer’s disease on neuropathological burden and clinical characteristics in the Brains for Dementia Research cohort. Alzheimers Dement 2020. [DOI: 10.1002/alz.042868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | | | | | | | - Rebecca Sims
- Division of Psychological Medicine and Clinical Neurosciences Cardiff University Cardiff United Kingdom
| | | | - Kevin Morgan
- University of Nottingham Nottingham United Kingdom
| | - Alan J. Thomas
- Translational and Clinical Research Institute Newcastle University Newcastle upon Tyne United Kingdom
| | - Paul T. Francis
- King’s College London London United Kingdom
- University of Exeter Exeter United Kingdom
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20
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Lim FTW, Low CYB, Lee J, Lee C, Francis PT, Lai MKP, Tan MGK. Selective upregulation of FynT tyrosine kinase in neurodegenerative dementia correlates well with tau pathology and neuroinflammation. Alzheimers Dement 2020. [DOI: 10.1002/alz.039307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | - Jasinda Lee
- National University of Singapore Singapore Singapore
| | - Chingli Lee
- Singapore General Hospital Singapore Singapore
| | | | - Mitchell Kim Peng Lai
- Memory Aging & Cognition Centre National University Health System Singapore Singapore
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Alic I, Goh P, Murray A, Portelius E, Gough G, Gkanatsiou E, Wallon D, Rovelet‐Lecrux A, Rostagno A, Ghiso J, Francis PT, Strydom A, Hardy J, Zetterberg H, Nizetic D. Alzheimer‐like pathology in trisomy 21 cerebral organoids amenable to pharmacological inhibition reveals BACE2 as a gene‐dose‐sensitive AD‐suppressor in human brain. Alzheimers Dement 2020. [DOI: 10.1002/alz.043136] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ivan Alic
- Lee Kong Chian School of Medicine NTU Singapore Singapore
| | - Pollyanna Goh
- Queen Mary University of London London United Kingdom
| | - Aoife Murray
- Lee Kong Chian School of Medicine Nanyang Technological University Singapore Singapore
| | - Erik Portelius
- Institute of Neuroscience and Physiology the Sahlgrenska Academy at the University of Gothenburg Gothenburg Sweden
| | - Gillian Gough
- Lee Kong Chian School of Medicine NTU Singapore Singapore
| | - Eleni Gkanatsiou
- Institute of Neuroscience and Physiology the Sahlgrenska Academy at the University of Gothenburg Gothenburg Sweden
| | - David Wallon
- Normandie University UNIROUEN Inserm U1245 and Rouen University Hospital, Department of Neurology and CNR‐MAJ, F 76000, Normandy Center for Genomic and Personalized Medicine Rouen France
| | - Anne Rovelet‐Lecrux
- Normandie University UNIROUEN Inserm U1245 and Rouen University Hospital, Department of Genetics and CNR‐MAJ, F 76000, Normandy Center for Genomic and Personalized Medicine Rouen France
| | | | | | | | - Andre Strydom
- South London and the Maudsley NHS Trust London United Kingdom
| | - John Hardy
- University College London London United Kingdom
| | - Henrik Zetterberg
- Institute of Neuroscience and Physiology the Sahlgrenska Academy at the University of Gothenburg Gothenburg Sweden
| | - Dean Nizetic
- Queen Mary University of London London United Kingdom
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22
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Cheng AL, Chong JR, Lee J, Attems J, Aarsland D, Francis PT, Lai MKP. Decreased JNK3 levels are associated with amyloid plaque and neurofibrillary tangles in dementia patients. Alzheimers Dement 2020. [DOI: 10.1002/alz.039231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ai Ling Cheng
- National University of Singapore Singapore Singapore
| | - Joyce R Chong
- Memory Aging and Cognition Center National University Health System Singapore Singapore
| | - Jasinda Lee
- National University of Singapore Singapore Singapore
| | | | - Dag Aarsland
- Institute of Psychiatry, Psychology & Neuroscience King's College London London United Kingdom
| | | | - Mitchell Kim Peng Lai
- Yong Loo Lin School of Medicine National University of Singapore Singapore Singapore
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23
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Francis PT. Vaccine Preventable Diseases (VPD) and Public Health. Indian Pediatr 2019; 56:1064. [PMID: 31884445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Affiliation(s)
- Paul T Francis
- Department of Community Medicine, Amrita Institute of Medical Sciences, Kochi, India.
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Mohandas S, Francis PT, Rakesh PS, Libin Antony PF. Assessment of respiratory morbidity among bus drivers and conductors of the state road transport corporation, Kochi, Kerala. J Family Med Prim Care 2019; 8:3887-3892. [PMID: 31879631 PMCID: PMC6924213 DOI: 10.4103/jfmpc.jfmpc_548_19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 08/22/2019] [Accepted: 09/19/2019] [Indexed: 12/04/2022] Open
Abstract
INTRODUCTION In 2012, 8% of the 2.3 million work-related deaths globally were from chronic respiratory diseases (CRDs). This study was undertaken to estimate the prevalence of respiratory morbidity among the drivers and conductors of the public road transport network in Kochi. METHODOLOGY A cross-sectional study was carried out in the public bus stand (South), Kochi between September 2015 and 2017 among bus drivers and conductors. The interview was conducted among 300 bus drivers and conductors using a locally adapted version of ATS-DLD-78-A questionnaire. Lung function assessment was done using a Mini Wright peak flow meter and a portable spirometer. Data were tabulated using MS Excel and analyzed using SPSS v20. RESULTS The prevalence of CRD among bus drivers and conductors was found to be 9.97% (95% CI 7.34-14.66) and chronic respiratory symptoms were found to be 19.2% (95% CI 14.58-23.82). On logistic regression, the independent predictors for the CRD were found to be working for more than 15 h/day (OR 2.815, 95% CI 1.26-6.28) and working for more than 4 days/week (OR 2.462, 95% CI 1.12-5.39). CONCLUSION CRD exists as a public health problem affecting approximately one in ten bus drivers and conductors in Kochi city. Applying the logical principles of ergonomics by modifying duty hours may be considered.
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Affiliation(s)
- Sreelakshmi Mohandas
- Department of Community Medicine, Amrita Institute of Medical Sciences, Amrita Vishwa Vidyapeetham, Kochi, Kerala, India
| | - Paul T. Francis
- Department of Community Medicine, Amrita Institute of Medical Sciences, Amrita Vishwa Vidyapeetham, Kochi, Kerala, India
| | - PS Rakesh
- Department of Community Medicine, Amrita Institute of Medical Sciences, Amrita Vishwa Vidyapeetham, Kochi, Kerala, India
| | - P F Libin Antony
- Department of Public Health Research, Amrita Institute of Medical Sciences, Amrita Vishwa Vidyapeetham, Kochi, Kerala, India
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Francis PT, Costello H, Hayes GM. Brains for Dementia Research: Evolution in a Longitudinal Brain Donation Cohort to Maximize Current and Future Value. J Alzheimers Dis 2019; 66:1635-1644. [PMID: 30452415 PMCID: PMC6294579 DOI: 10.3233/jad-180699] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Brain banking has a long and distinguished past, contributing greatly to our understanding of human neurological and psychiatric conditions. Brain banks have been operationally diverse, collecting primarily end stage disease, with variable quality clinical data available, yet it is now recognized the most informative brain donations are from those in longitudinally studied cohorts. The Brains for Dementia Research (BDR) cohort and program was for planned brain donation across five UK brain banks and one donation point, with standardized operating procedures, following longitudinal clinical and psychometric assessments for people with no cognitive impairment as well as those with dementia. Lay representatives with experience of dementia were involved from inception of BDR and 74.5% of all enquiries about participation came through routes that were directly attributable to or influenced by lay representatives. Ten years after inception, this ongoing project has received over 700 brain donations from the recruited cohort of 3,276 potential brain donors. At cohort census for this paper, 72.2% of the living cohort have no cognitive impairment by assessment, whereas only 28.3% of the donated cohort were without cognitive impairment. It is important that brain banks are agile and reflect the changing needs of the research community, given that ‘big data’, readiness cohorts, and GWAS demand large sample numbers of highly characterized individuals to facilitate new approaches and understanding of pathological processes in dementia.
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Affiliation(s)
- Paul T Francis
- King's College London, Wolfson Centre for Age-Related Diseases, London, UK
| | - Helen Costello
- King's College London, Wolfson Centre for Age-Related Diseases, London, UK
| | - Gillian M Hayes
- King's College London, Wolfson Centre for Age-Related Diseases, London, UK
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26
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Francis PT. Transgenerational Preventive Practices of Diabetes Mellitus Type II Patients Attending a Tertiary Care Hospital in Cochin, India. Indian J Community Med 2019; 44:S7-S9. [PMID: 31728080 PMCID: PMC6824173 DOI: 10.4103/ijcm.ijcm_17_19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
INTRODUCTION The incidence and prevalence of diabetes mellitus type II (DM type II) has been increasing relentlessly over the past few decades despite amassing a great body of evidence regarding its causation and prevention. OBJECTIVE To determine the practices of DM type II patients to prevent the disease in their children. METHODOLOGY This is a mixed-methods study at a tertiary care teaching hospital. DM type II patients attending the department of endocrinology and its urban health center were the study participants. Data were collected using an investigator-administered questionnaire and in-depth interviews. A total of 137 patients were included in the quantitative part, and 16 in-depth interviews were conducted. Quantitative data were analyzed by SPSS software, and qualitative data were analyzed manually. RESULTS Nearly 62% of the patients had a family history of DM type II, 62% of the patients were aware of the genetic risk of the disease, and 26% of the patients had tried some form of preventive measure. Most of them advised their children to be careful about diet and exercise, but did not implement any specific or sustained behavioral change. The main reason was that the patients were not aware of the importance of the hereditary nature of the disease. Other reasons were children were grown up, were living separately, or did not appreciate the seriousness of the risk. CONCLUSION There is a need to educate the patients about the hereditary risk of developing DM type II to empower them to implement preventive practices in their households.
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Affiliation(s)
- Paul T. Francis
- Department of Community Medicine, Amrita Institute of Medical Sciences, Kochi, Kerala, India,Address for correspondence: Dr. Paul T. Francis, Amrita Institute of Medical Sciences, Amrita Vishwa Vidyapeetham, Ponekkara, Kochi - 682 041, Kerala, India. E-mail:
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27
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Thubron EB, Rosa HS, Hodges A, Sivaprasad S, Francis PT, Pienaar IS, Malik AN. Regional mitochondrial DNA and cell-type changes in post-mortem brains of non-diabetic Alzheimer's disease are not present in diabetic Alzheimer's disease. Sci Rep 2019; 9:11386. [PMID: 31388037 PMCID: PMC6684616 DOI: 10.1038/s41598-019-47783-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 07/09/2019] [Indexed: 12/26/2022] Open
Abstract
Diabetes increases the risk of Alzheimer's disease (AD), and mitochondrial dysfunction is implicated in both diseases, however the impact of both diabetes and AD on brain mitochondria is not known. We measured mitochondrial DNA (mtDNA), an indicator of mitochondrial function, in frontal, parietal, and cerebellar regions of post-mortem human brains (n = 74) from non-cognitively impaired controls (NCI), mild-cognitively impaired (MCI) and AD cases. In a subset of parietal cortices, we measured mRNAs corresponding to cell types and mitochondrial function and semi-automated stereological assessment was performed on immune-staining of parietal cortex sections. mtDNA showed significant regional variation, highest in parietal cortex, and lowest in cerebellum. Irrespective of cognitive status, all brain regions had significantly higher mtDNA in diabetic cases. In the absence of diabetes, AD parietal cortices had decreased mtDNA, reduced MAP2 (neuronal) and increased GFAP (astrocyte) mRNA, relative to NCI. However, in the presence of diabetes, we did not observe these AD-related changes, suggesting that the pathology observed in diabetic AD may be different to that seen in non-diabetic AD. The lack of clear functional changes in mitochondrial parameters in diabetic AD suggest different cellular mechanisms contributing to cognitive impairment in diabetes which remain to be fully understood.
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Affiliation(s)
- Elisabeth B Thubron
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, UK
| | - Hannah S Rosa
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, UK
| | - Angela Hodges
- Department of Old Age Psychiatry, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | | | - Paul T Francis
- Wolfson Centre for Age-Related Diseases, King's College London, London, UK
| | - Ilse S Pienaar
- School of Life Sciences, University of Sussex, Falmer, BN1 9PH, UK
| | - Afshan N Malik
- Department of Diabetes, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, UK.
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28
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Clarke E, Jantrachotechatchawan C, Buhidma Y, Broadstock M, Yu L, Howlett D, Aarsland D, Ballard C, Francis PT. Age-related neurochemical and behavioural changes in D409V/WT GBA1 mouse: Relevance to lewy body dementia. Neurochem Int 2019; 129:104502. [PMID: 31299418 DOI: 10.1016/j.neuint.2019.104502] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 06/21/2019] [Accepted: 07/08/2019] [Indexed: 12/13/2022]
Abstract
Heterozygous mutations in GBA1, the gene which encodes the lysosomal enzyme glucocerebrosidase (GCase), are a strong genetic risk factor for the development of Lewy body dementia (LBD). Until this point however, recapitulation of the symptoms and pathology of LBD has been limited to a homozygous GBA1 mouse model which genetically and enzymatically reflects the lysosomal storage disorder Gaucher's disease. This study reports for the first time cognitive impairment by two independent behavioural tests in heterozygous GBA1 mutant mice (D409V/WT) which demonstrate significant cognitive impairment by the age of 12 months. Furthermore, reductions in GBA1 GCase enzyme activity within the brain reflects levels seen in sporadic and GBA1 mutant LBD patients. While there is no overt deposition of Lewy bodies within the hippocampus, alterations to cholinergic machinery and glial proliferation are evident, both pathological features of LBD. Interestingly, we also describe the novel finding of significantly reduced GBA2 GCase enzyme activity specifically within the hippocampus. This suggests that reduced GBA1 GCase enzyme activity dis-equilibrates the finely balanced glycosphingolipid metabolism pathway and that reductions in GBA2 GCase enzyme could contribute to the pathological and behavioural effects seen. Overall, this study presents evidence to suggest that pathological hallmarks associated with LBD specifically affecting brain regions intrinsically linked with cognition are present in the D409V/WT mice. In the absence of Lewy body deposition, the D409V/WT mice could be considered an early pre-clinical model of LBD with potential for drug discovery. Since few robust pre-clinical models of LBD currently exist, with further characterization, the mouse model described here may contribute significantly to developments in the LBD field.
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Affiliation(s)
- E Clarke
- King's College London, Wolfson Centre for Age-Related Diseases, UK.
| | | | - Y Buhidma
- King's College London, Wolfson Centre for Age-Related Diseases, UK
| | - M Broadstock
- King's College London, Wolfson Centre for Age-Related Diseases, UK
| | - L Yu
- King's College London, Wolfson Centre for Age-Related Diseases, UK
| | - D Howlett
- King's College London, Wolfson Centre for Age-Related Diseases, UK
| | - D Aarsland
- King's College London, Department of Old Age Psychiatry, UK
| | | | - P T Francis
- King's College London, Wolfson Centre for Age-Related Diseases, UK; University of Exeter, UK
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Bereczki E, Branca RM, Francis PT, Pereira JB, Baek JH, Hortobágyi T, Winblad B, Ballard C, Lehtiö J, Aarsland D. Synaptic markers of cognitive decline in neurodegenerative diseases: a proteomic approach. Brain 2019; 141:582-595. [PMID: 29324989 DOI: 10.1093/brain/awx352] [Citation(s) in RCA: 139] [Impact Index Per Article: 27.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Accepted: 10/30/2017] [Indexed: 01/12/2023] Open
Abstract
See Attems and Jellinger (doi:10.1093/brain/awx360) for a scientific commentary on this article.Cognitive changes occurring throughout the pathogenesis of neurodegenerative diseases are directly linked to synaptic loss. We used in-depth proteomics to compare 32 post-mortem human brains in the prefrontal cortex of prospectively followed patients with Alzheimer's disease, Parkinson's disease with dementia, dementia with Lewy bodies and older adults without dementia. In total, we identified 10 325 proteins, 851 of which were synaptic proteins. Levels of 25 synaptic proteins were significantly altered in the various dementia groups. Significant loss of SNAP47, GAP43, SYBU (syntabulin), LRFN2, SV2C, SYT2 (synaptotagmin 2), GRIA3 and GRIA4 were further validated on a larger cohort comprised of 92 brain samples using ELISA or western blot. Cognitive impairment before death and rate of cognitive decline significantly correlated with loss of SNAP47, SYBU, LRFN2, SV2C and GRIA3 proteins. Besides differentiating Parkinson's disease dementia, dementia with Lewy bodies, and Alzheimer's disease from controls with high sensitivity and specificity, synaptic proteins also reliably discriminated Parkinson's disease dementia from Alzheimer's disease patients. Our results suggest that these particular synaptic proteins have an important predictive and discriminative molecular fingerprint in neurodegenerative diseases and could be a potential target for early disease intervention.
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Affiliation(s)
- Erika Bereczki
- Department of Neurobiology, Care Sciences and Society, Center for Alzheimer Research, Division of Neurogeriatrics, Karolinska Institutet, Novum, Stockholm, Sweden
| | - Rui M Branca
- Department of Oncology-Pathology, Science for Life Laboratory, Karolinska Institutet, Stockholm, Sweden
| | - Paul T Francis
- King's College London, Wolfson Centre for Age-Related Diseases, London SE1 1UL, UK
| | - Joana B Pereira
- Department of Neurobiology, Care Sciences and Society, Center for Alzheimer Research, Division of Clinical Geriatrics, Karolinska Institutet, Novum, 14186 Stockholm, Sweden
| | - Jean-Ha Baek
- Department of Neurobiology, Care Sciences and Society, Center for Alzheimer Research, Division of Neurogeriatrics, Karolinska Institutet, Novum, Stockholm, Sweden
| | - Tibor Hortobágyi
- MTA-DE Cerebrovascular and Neurodegenerative Research Group, University of Debrecen, Debrecen, Hungary.,Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Bengt Winblad
- Department of Neurobiology, Care Sciences and Society, Center for Alzheimer Research, Division of Neurogeriatrics, Karolinska Institutet, Novum, Stockholm, Sweden
| | - Clive Ballard
- Department of Oncology-Pathology, Science for Life Laboratory, Karolinska Institutet, Stockholm, Sweden
| | - Janne Lehtiö
- Department of Oncology-Pathology, Science for Life Laboratory, Karolinska Institutet, Stockholm, Sweden
| | - Dag Aarsland
- Department of Neurobiology, Care Sciences and Society, Center for Alzheimer Research, Division of Neurogeriatrics, Karolinska Institutet, Novum, Stockholm, Sweden.,Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
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Chaudhury S, Brookes KJ, Patel T, Fallows A, Guetta-Baranes T, Turton JC, Guerreiro R, Bras J, Hardy J, Francis PT, Croucher R, Holmes C, Morgan K, Thomas AJ. Alzheimer's disease polygenic risk score as a predictor of conversion from mild-cognitive impairment. Transl Psychiatry 2019; 9:154. [PMID: 31127079 PMCID: PMC6534556 DOI: 10.1038/s41398-019-0485-7] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 04/05/2019] [Accepted: 04/10/2019] [Indexed: 11/08/2022] Open
Abstract
Mild-cognitive impairment (MCI) occurs in up to one-fifth of individuals over the age of 65, with approximately a third of MCI individuals converting to dementia in later life. There is a growing necessity for early identification for those at risk of dementia as pathological processes begin decades before onset of symptoms. A cohort of 122 individuals diagnosed with MCI and followed up for a 36-month period for conversion to late-onset Alzheimer's disease (LOAD) were genotyped on the NeuroChip array along with pathologically confirmed cases of LOAD and cognitively normal controls. Polygenic risk scores (PRS) for each individual were generated using PRSice-2, derived from summary statistics produced from the International Genomics of Alzheimer's Disease Project (IGAP) genome-wide association study. Predictability models for LOAD were developed incorporating the PRS with APOE SNPs (rs7412 and rs429358), age and gender. This model was subsequently applied to the MCI cohort to determine whether it could be used to predict conversion from MCI to LOAD. The PRS model for LOAD using area under the precision-recall curve (AUPRC) calculated a predictability for LOAD of 82.5%. When applied to the MCI cohort predictability for conversion from MCI to LOAD was 61.0%. Increases in average PRS scores across diagnosis group were observed with one-way ANOVA suggesting significant differences in PRS between the groups (p < 0.0001). This analysis suggests that the PRS model for LOAD can be used to identify individuals with MCI at risk of conversion to LOAD.
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Affiliation(s)
| | | | - Tulsi Patel
- Human Genetics Group, University of Nottingham, Nottingham, UK
| | - Abigail Fallows
- Human Genetics Group, University of Nottingham, Nottingham, UK
| | | | - James C Turton
- Human Genetics Group, University of Nottingham, Nottingham, UK
| | - Rita Guerreiro
- UK Dementia Research Institute at University College London and ION Department of Neurodegenerative Disease, London, UK
| | - Jose Bras
- UK Dementia Research Institute at University College London and ION Department of Neurodegenerative Disease, London, UK
| | - John Hardy
- UK Dementia Research Institute at University College London and ION Department of Neurodegenerative Disease, London, UK
| | - Paul T Francis
- Brains for Dementia Research Resource, Wolfson CARD, King's College London, London, UK
| | | | - Clive Holmes
- Faculty of Medicine, University of Southampton, Southampton, UK
| | - Kevin Morgan
- Human Genetics Group, University of Nottingham, Nottingham, UK
| | - A J Thomas
- Institute of Neuroscience Biomedical Research Building Campus for Ageing and Vitality Newcastle University, Newcastle upon Tyne, NE4 5PL, UK
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31
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Chai YL, Xing H, Chong JR, Francis PT, Ballard CG, Chen CP, Lai MKP. Mitochondrial Translocase of the Outer Membrane Alterations May Underlie Dysfunctional Oxidative Phosphorylation in Alzheimer's Disease. J Alzheimers Dis 2019; 61:793-801. [PMID: 29254089 DOI: 10.3233/jad-170613] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND The translocase of the outer membrane (TOM) is a vital mitochondrial transport system facilitating the importation of nuclear encoded proteins into the organelle. While mitochondrial dysfunction, including perturbation of oxidative phosphorylation (OXPHOS) complex, is evident in Alzheimer's disease (AD), it remains unclear whether the observed OXPHOS deficits may be associated with TOM alterations. OBJECTIVES To correlate TOM subunits with OXPHOS complex proteins in AD. METHODS Postmortem neocortex (BA40) from AD and age-matched controls were processed to obtain mitochondrial enriched homogenates for the measurement of Tom20, Tom22, Tom40, and Tom70 as well as components of OXPHOS complex I-V by immunoblotting. RESULTS Tom20 and Tom70 immunoreactivities were significantly reduced in AD, as were components of OXPHOS complex I and III. Both Tom20 and Tom70 positively correlated with complex III and V, while Tom20 also correlated withcomplex IV. CONCLUSION Reductions in certain TOM subunits and their correlations with specific OXPHOS complex proteins suggest that an impaired mitochondrial transportation system may contribute to previously observed oxidative phosphorylation deficits in AD. Follow-up studies are needed to corroborate the present correlative study.
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Affiliation(s)
- Yuek Ling Chai
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Huayang Xing
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Joyce R Chong
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Paul T Francis
- Wolfson Centre for Age-Related Diseases, King's College London, London, UK
| | - Clive G Ballard
- Wolfson Centre for Age-Related Diseases, King's College London, London, UK.,University of Exeter Medical School, University of Exeter, Exeter, UK
| | - Christopher P Chen
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Mitchell K P Lai
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Wolfson Centre for Age-Related Diseases, King's College London, London, UK
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Francis PT, Hayes GM, Costello H, Whitfield DR. Brains for Dementia Research: The Importance of Cohorts in Brain Banking. Neurosci Bull 2019; 35:289-294. [PMID: 30604278 DOI: 10.1007/s12264-018-0327-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 09/19/2018] [Indexed: 02/04/2023] Open
Affiliation(s)
- Paul T Francis
- Wolfson Centre for Age-Related Diseases, King's College London, London, SE1 1UL, UK.
| | - Gillian M Hayes
- Wolfson Centre for Age-Related Diseases, King's College London, London, SE1 1UL, UK
| | - Helen Costello
- Wolfson Centre for Age-Related Diseases, King's College London, London, SE1 1UL, UK
| | - David R Whitfield
- Wolfson Centre for Age-Related Diseases, King's College London, London, SE1 1UL, UK
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33
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Mavila AD, Francis PT. Impact of Swachh Bharat Abhiyan on Residents of Cochin Corporation. Indian J Community Med 2019; 44:S19-S22. [PMID: 31728083 PMCID: PMC6824165 DOI: 10.4103/ijcm.ijcm_24_19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Context: Environmental sanitation is a major public health issue in India. Sustainable Development Goal 6 envisages the accessibility of safe water and sanitation throughout the world. Swachh Bharat Abhiyan (SBA), a national cleanliness campaign established by the Government of India in 2014, has six main objectives. It has crossed the half-way point of its intended implementation course. Aims: This study aims to assess the impact of SBA on the sanitation of Cochin Corporation and to identify factors associated with awareness and practice of SBA. Settings and Design: A cross-sectional study among residents of Cochin Corporation. Materials and Methods: Semi-structured questionnaire was used to measure awareness, practice, and impact of SBA. Three divisions were selected purposively. A score was assigned for knowledge and impact assessment questions and was classified into three categories. Statistical Analysis Used: Descriptive statistics using frequencies and percentages were done. Chi-square test was used to test differences between proportions. Results: Thirty percent had no awareness regarding SBA and 42% had minimal awareness regarding the program and its objectives. Only 24% responded that SBA had a good impact on the overall sanitation of the community. The impact of SBA was significantly associated with socioeconomic status. The study revealed the major sanitary concern of the community to be the disposal of solid waste. Conclusion: The SBA did not have a significant impact on Cochin population due to existing good sanitation. Solid waste disposal is still a concern of the community. As far as, Kerala is concerned, it appears that the primary focus of SBA should be on Municipal Solid Waste Management.
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Affiliation(s)
- Amrita Das Mavila
- Department of Community Medicine, Amrita Institute of Medical Sciences, Amrita Vishwa Vidyapeetham, Coimbatore, Tamil Nadu, India
| | - Paul T Francis
- Department of Community Medicine, Amrita Institute of Medical Sciences, Amrita Vishwa Vidyapeetham, Coimbatore, Tamil Nadu, India
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Costello H, Hayes GM, Francis PT. Factors affecting withdrawal and donation attrition in the brains for dementia research cohort. Int J Geriatr Psychiatry 2018; 33:1709-1716. [PMID: 30209830 DOI: 10.1002/gps.4975] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 08/06/2018] [Indexed: 11/10/2022]
Abstract
OBJECTIVES To measure two forms of attrition in a cohort of volunteer brain donors: Withdrawal during life and non-donation at death. To test whether cognitive impairment independently predicts attrition. METHOD Attrition rates were calculated for all registered participants and for all brain donors who had completed a baseline and follow-up assessment of cognition, health, and lifestyle. Attrition reasons were described, and attrition rates were compared by gender, age group, and cognitive status. Multivariate logistic regression was used to identify the factors which independently predicted during life and at death. RESULTS A total of 3276 brain donors registered and 2307 (70.4%) remained in the cohort. Attrition rate overall was 5.9% for withdrawal and 13.8% for donation. Family disagreement and the brain bank not being informed of participant death were the most common reasons for withdrawal and donation attrition. Withdrawal was associated with having cognitive impairment (OR 2.0 95% CI 1.1-3.5), increased age (OR 3.1 95% CI 1.4-6.9), and lower education (OR 1.8 95% CI 1.2-2.8). Participants exhibiting cognitive decline between assessments were more likely to withdraw (OR 4.9 95% CI 1.7-13.6). Participants living alone were almost twice as likely to die without donating (OR 1.9 95% CI 1.1-3.3). CONCLUSIONS Attrition rates were relatively low, and consistent with other studies cognitive impairment, increased age, and less education predicted study withdrawal. Deaths of participants living alone were less likely to result in donation. Tailored, regular retention practices aimed at resolving family disagreement regarding donation decisions are required.
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Chai YL, Chong JR, Weng J, Howlett D, Halsey A, Lee JH, Attems J, Aarsland D, Francis PT, Chen CP, Lai MKP. Lysosomal cathepsin D is upregulated in Alzheimer's disease neocortex and may be a marker for neurofibrillary degeneration. Brain Pathol 2018; 29:63-74. [PMID: 30051532 DOI: 10.1111/bpa.12631] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Accepted: 06/12/2018] [Indexed: 01/01/2023] Open
Abstract
Alzheimer's disease (AD) is characterized by accumulation of β-amyloid plaques (AP) and neurofibrillary tangles (NFT) in the cortex, together with synaptic loss and amyloid angiopathy. Perturbations in the brain lysosomal system, including the cathepsin family of proteases, have been implicated in AD where they may be involved in proteolytic clearance of misfolded and abnormally aggregated peptides. However, the status of cathepsin D (catD) is unclear in Lewy body dementia, the second most common form of neurodegenerative dementia after AD, and characterized by Lewy bodies (LB) containing aggregated α-synuclein. Furthermore, earlier reports of catD changes in AD have not been entirely consistent. We measured CatD immunoreactivities in the temporal (Brodmann area BA21) and parietal (BA40) cortices of well characterized AD brains as well as two clinical subtypes of Lewy body dementia, namely Parkinson disease dementia (PDD) and dementia with Lewy bodies (DLB), known to show varying degrees of concomitant AD pathology. Increased catD immunoreactivities in AD were found for both neocortical regions measured, where they also correlated with neuropathological NFT scores and phosphorylated pSer396 tau burden, and appeared to co-localize at least partly to NFT-containing neurons. In contrast, catD was increased only in BA40 in DLB and not at all in PDD, did not correlate with LB scores, and did not appreciably co-localize with α-synuclein inclusions. Our study suggests that catD upregulation may be an adaptive response to AD-related processes leading to neurofibrillary degeneration, but may not be directly associated with formation of α-synuclein inclusions in Lewy body dementia.
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Affiliation(s)
- Yuek Ling Chai
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Kent Ridge, Singapore
| | - Joyce R Chong
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Kent Ridge, Singapore.,Memory Aging and Cognition Centre, National University Health System, Kent Ridge, Singapore
| | - Jiaju Weng
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Kent Ridge, Singapore
| | - David Howlett
- Wolfson Centre for Age-Related Diseases, King's College London, London, UK
| | - Andrea Halsey
- Wolfson Centre for Age-Related Diseases, King's College London, London, UK
| | - Jasinda H Lee
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Kent Ridge, Singapore
| | - Johannes Attems
- Institute of Neuroscience, Campus for Ageing and Vitality, Newcastle University, Newcastle upon Tyne, UK
| | - Dag Aarsland
- Department NVS, Center for Alzheimer Research, Division for Neurogeriatrics, Karolinska Institute, Huddinge, Sweden
| | - Paul T Francis
- Wolfson Centre for Age-Related Diseases, King's College London, London, UK
| | - Christopher P Chen
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Kent Ridge, Singapore.,Memory Aging and Cognition Centre, National University Health System, Kent Ridge, Singapore
| | - Mitchell K P Lai
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Kent Ridge, Singapore.,Memory Aging and Cognition Centre, National University Health System, Kent Ridge, Singapore.,Wolfson Centre for Age-Related Diseases, King's College London, London, UK
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Chappell S, Patel T, Guetta-Baranes T, Sang F, Francis PT, Morgan K, Brookes KJ. Observations of extensive gene expression differences in the cerebellum and potential relevance to Alzheimer's disease. BMC Res Notes 2018; 11:646. [PMID: 30180886 PMCID: PMC6123947 DOI: 10.1186/s13104-018-3732-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Accepted: 08/24/2018] [Indexed: 12/15/2022] Open
Abstract
Objectives In order to determine how gene expression is altered in disease it is of fundamental importance that the global distribution of gene expression levels across the disease-free brain are understood and how differences between tissue types might inform tissue choice for investigation of altered expression in disease state. The aim of this pilot project was to use RNA-sequencing to investigate gene expression differences between five general areas of post-mortem human brain (frontal, temporal, occipital, parietal and cerebellum), and in particular changes in gene expression in the cerebellum compared to cortex regions for genes relevant to Alzheimer’s disease, as the cerebellum is largely preserved from disease pathology and could be an area of interest for neuroprotective pathways. Results General gene expression profiles were found to be similar between cortical regions of the brain, however the cerebellum presented a distinct expression profile. Focused exploration of gene expression for genes associated with Alzheimer’s disease suggest that those involved in the immunity pathway show little expression in the brain. Furthermore some Alzheimer’s disease associated genes display significantly different expression in the cerebellum compared with other brain regions, which might indicate potential neuroprotective measures.
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Affiliation(s)
- Sally Chappell
- Human Genetics, School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Tulsi Patel
- Human Genetics, School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Tamar Guetta-Baranes
- Human Genetics, School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Fei Sang
- DeepSeq Facility, University of Nottingham, Nottingham, UK
| | - Paul T Francis
- Wolfson Centre for Age Related Diseases, King's College London, London, UK
| | - Kevin Morgan
- Human Genetics, School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Keeley J Brookes
- Human Genetics, School of Life Sciences, University of Nottingham, Nottingham, UK.
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Whitfield DR, Francis PT, Ballard C, Williams G. Associations between ZnT3, tau pathology, agitation, and delusions in dementia. Int J Geriatr Psychiatry 2018; 33:1146-1152. [PMID: 29856089 DOI: 10.1002/gps.4908] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 04/13/2018] [Indexed: 11/11/2022]
Abstract
OBJECTIVE Neuropsychiatric symptoms such as agitation and delusions occur frequently in Lewy body dementia and Alzheimer's disease and represent significant burden and unmet treatment need. The underlying aetiology remains poorly understood. METHODS We used a multidimensional linear model to look for associations between measurements of agitation, delusions, amyloid, tau and α-synuclein pathology, and synaptic proteins (ZnT3, PSD95, synaptophysin, and β-III-tubulin) across multiple brain regions in post-mortem tissue from a cohort of 130 Lewy body dementia and Alzheimer's disease patients and non-demented controls. RESULTS We found both agitations and delusions to be significantly associated with increased tau pathology and decreased levels of ZnT3. ZnT3 packages Zn2+ into synaptic vesicles to be released as a long-term modulator of synaptic activity. CONCLUSIONS Our finding adds to the evidence that zinc modulating compounds are of interest for treatment or symptomatic relief in these dementias.
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Affiliation(s)
- David R Whitfield
- Wolfson Centre for Age-Related Diseases, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK.,University of Exeter Medical School, Exeter, UK
| | - Paul T Francis
- Wolfson Centre for Age-Related Diseases, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | | | - Gareth Williams
- Wolfson Centre for Age-Related Diseases, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
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Patel T, Brookes KJ, Guetta-Baranes T, Chaudhury SR, Turton J, Hernandez D, Singleton A, Hardy J, Guerreiro R, Francis PT, Bras JT, Morgan K. P1‐168: LINKING POLYGENIC RISK SCORES TO ALZHEIMER'S DISEASE GENES. Alzheimers Dement 2018. [DOI: 10.1016/j.jalz.2018.06.172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Tulsi Patel
- University of NottinghamNottinghamUnited Kingdom
| | | | | | | | - James Turton
- University of NottinghamNottinghamUnited Kingdom
| | | | | | - John Hardy
- University College LondonLondonUnited Kingdom
| | - Rita Guerreiro
- UK Dementia Research Institute at UCLLondonUnited Kingdom
| | | | - Jose T. Bras
- UK Dementia Research Institute at UCLLondonUnited Kingdom
| | - Kevin Morgan
- University of NottinghamNottinghamUnited Kingdom
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39
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Chaudhury SR, Patel T, Fallows A, Brookes KJ, Guetta-Baranes T, Turton J, Sussams R, Guerreiro R, Bras JT, Hardy J, Francis PT, Holmes C, Morgan K. P3‐077: ALZHEIMER'S DISEASE (AD) POLYGENIC RISK SCORE (PRS) AS A PREDICTOR OF CONVERSION FROM MILD COGNITIVE IMPAIRMENT (MCI). Alzheimers Dement 2018. [DOI: 10.1016/j.jalz.2018.06.1433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
| | - Tulsi Patel
- University of NottinghamNottinghamUnited Kingdom
| | | | | | | | - James Turton
- University of NottinghamNottinghamUnited Kingdom
| | | | - Rita Guerreiro
- UK Dementia Research Institute at UCLLondonUnited Kingdom
| | - Jose T. Bras
- UK Dementia Research Institute at UCLLondonUnited Kingdom
| | - John Hardy
- University College LondonLondonUnited Kingdom
| | | | - Clive Holmes
- University of SouthamptonSouthamptonUnited Kingdom
| | - Kevin Morgan
- University of NottinghamNottinghamUnited Kingdom
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Brookes KJ, McConnell G, Williams K, Chaudhury S, Madhan G, Patel T, Turley C, Guetta-Baranes T, Bras J, Guerreiro R, Hardy J, Francis PT, Morgan K. Genotyping of the Alzheimer’s Disease Genome-Wide Association Study Index Single Nucleotide Polymorphisms in the Brains for Dementia Research Cohort. J Alzheimers Dis 2018; 64:355-362. [DOI: 10.3233/jad-180191] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Keeley J. Brookes
- Human Genetics, School of Life Sciences, University of Nottingham, Nottingham, UK
| | - George McConnell
- Human Genetics, School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Kirsty Williams
- Human Genetics, School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Sultan Chaudhury
- Human Genetics, School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Gaganjit Madhan
- UCL Genomics, UCL Genomics Great Ormond Street Institute of Child Health, London, UK
| | - Tulsi Patel
- Human Genetics, School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Christopher Turley
- Human Genetics, School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Tamar Guetta-Baranes
- Human Genetics, School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Jose Bras
- Department of Molecular Neuroscience, Institute of Neurology, University College London, London, UK
- Department of Medical Sciences, Institute of Biomedicine-iBiMED, University of Aveiro, Aveiro, Portugal
- UK Dementia Research Institute at UCL (UK DRI), London, UK
| | - Rita Guerreiro
- Department of Molecular Neuroscience, Institute of Neurology, University College London, London, UK
- Department of Medical Sciences, Institute of Biomedicine-iBiMED, University of Aveiro, Aveiro, Portugal
- UK Dementia Research Institute at UCL (UK DRI), London, UK
| | - John Hardy
- Department of Molecular Neuroscience, Institute of Neurology, University College London, London, UK
- UK Dementia Research Institute at UCL (UK DRI), London, UK
| | - Paul T. Francis
- King’s College London, Wolfson Centre for Age Related Diseases, London, UK
| | - Kevin Morgan
- Human Genetics, School of Life Sciences, University of Nottingham, Nottingham, UK
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Alghamdi A, Vallortigara J, Howlett DR, Broadstock M, Hortobágyi T, Ballard C, Thomas AJ, O'Brien JT, Aarsland D, Attems J, Francis PT, Whitfield DR. Reduction of RPT6/S8 (a Proteasome Component) and Proteasome Activity in the Cortex is Associated with Cognitive Impairment in Lewy Body Dementia. J Alzheimers Dis 2018; 57:373-386. [PMID: 28269775 PMCID: PMC5438478 DOI: 10.3233/jad-160946] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Lewy body dementia is the second most common neurodegenerative dementia and is pathologically characterized by α-synuclein positive cytoplasmic inclusions, with varying amounts of amyloid-β (Aβ) and hyperphosphorylated tau (tau) aggregates in addition to synaptic loss. A dysfunctional ubiquitin proteasome system (UPS), the major proteolytic pathway responsible for the clearance of short lived proteins, may be a mediating factor of disease progression and of the development of α-synuclein aggregates. In the present study, protein expression of a key component of the UPS, the RPT6 subunit of the 19S regulatory complex was determined. Furthermore, the main proteolytic-like (chymotrypsin- and PGPH-) activities have also been analyzed. The middle frontal (Brodmann, BA9), inferior parietal (BA40), and anterior cingulate (BA24) gyrus' cortex were selected as regions of interest from Parkinson's disease dementia (PDD, n = 31), dementia with Lewy bodies (DLB, n = 44), Alzheimer's disease (AD, n = 16), and control (n = 24) brains. Clinical and pathological data available included the MMSE score. DLB, PDD, and AD were characterized by significant reductions of RPT6 (one-way ANOVA, p < 0.001; Bonferroni post hoc test) in prefrontal cortex and parietal cortex compared with controls. Strong associations were observed between RPT6 levels in prefrontal, parietal cortex, and anterior cingulate gyrus and cognitive impairment (p = 0.001, p = 0.001, and p = 0.008, respectively). These findings highlight the involvement of the UPS in Lewy body dementia and indicate that targeting the UPS may have the potential to slow down or reduce the progression of cognitive impairment in DLB and PDD.
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Affiliation(s)
- Amani Alghamdi
- King's College London, Wolfson Centre for Age-Related Diseases, London, UK.,Department of Biochemistry, King Saud University, College of Science, Riyadh, Saudi Arabia
| | - Julie Vallortigara
- King's College London, Wolfson Centre for Age-Related Diseases, London, UK
| | - David R Howlett
- King's College London, Wolfson Centre for Age-Related Diseases, London, UK
| | - Martin Broadstock
- King's College London, Wolfson Centre for Age-Related Diseases, London, UK
| | - Tibor Hortobágyi
- Department of Neuropathology, Institute of Pathology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Clive Ballard
- King's College London, Wolfson Centre for Age-Related Diseases, London, UK.,University of Exeter Medical School, University of Exeter, Devon, UK
| | - Alan J Thomas
- NIHR Biomedical Research Centre for Mental Health, South London and Maudsley NHS Foundation Trust and Institute of Psychiatry, Kings College London, UK
| | | | - Dag Aarsland
- Department of Neurobiology, Ward Sciences and Society, Karolinska Institute, Stockholm Sweden.,Centre for Age-Related Medicine, Stavanger University Hospital, Stavanger, Norway
| | - Johannes Attems
- Institute of Neuroscience and Newcastle University Institute for Ageing, Campus for Ageing and Vitality, UK
| | - Paul T Francis
- King's College London, Wolfson Centre for Age-Related Diseases, London, UK
| | - David R Whitfield
- King's College London, Wolfson Centre for Age-Related Diseases, London, UK
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Chong JR, Chai YL, Lee JH, Howlett D, Attems J, Ballard CG, Aarsland D, Francis PT, Chen CP, Lai MKP. Increased Transforming Growth Factor β2 in the Neocortex of Alzheimer's Disease and Dementia with Lewy Bodies is Correlated with Disease Severity and Soluble Aβ42 Load. J Alzheimers Dis 2018; 56:157-166. [PMID: 27911312 DOI: 10.3233/jad-160781] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
BACKGROUND Of the three transforming growth factor (TGF)-β isoforms known, TGFβ1 deficits have been widely reported in Alzheimer's disease (AD) and studied as a potential therapeutic target. In contrast, the status of TGFβ2, which has been shown to mediate amyloid-β (Aβ)-mediated neuronal death, are unclear both in AD and in Lewy body dementias (LBD) with differential neuritic plaque and neurofibrillary tangle burden. OBJECTIVE To measure neocortical TGFβ2 levels and their correlations with neuropathological and clinical markers of disease severity in a well-characterized cohort of AD as well as two clinical subtypes of LBD, dementia with Lewy bodies (DLB) and Parkinson's disease dementia (PDD), known to manifest relatively high and low Aβ plaque burden, respectively. METHODS Postmortem samples from temporal cortex (BA21) were measured for TGFβ2 using a Luminex-based platform, and correlated with scores for neuritic plaques, neurofibrillary tangles, α-synuclein pathology, dementia severity (as measured by annual decline of Mini-Mental State Examination scores) as well as soluble and total fractions of brain Aβ42. RESULTS TGFβ2 was significantly increased in AD and DLB, but not in PDD. TGFβ2 also correlated with scores for neurofibrillary tangles, Lewy bodies (within the LBD group), dementia severity, and soluble Aβ42 concentration, but not with neuritic plaque scores, total Aβ42, or monomeric α-synuclein immunoreactivity. CONCLUSIONS TGFβ2 is increased in the temporal cortex of AD and DLB, and its correlations with neuropathological and clinical markers of disease severity as well as with soluble Aβ42 load suggest a potential pathogenic role in mediating the neurotoxicity of non-fibrillar Aβ. Our study also indicates the potential utility of targeting TGFβ2 in pharmacotherapeutic approaches to AD and DLB.
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Affiliation(s)
- Joyce R Chong
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Yuek Ling Chai
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Jasinda H Lee
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - David Howlett
- Wolfson Centre for Age-Related Diseases, King's College London, London, UK
| | - Johannes Attems
- Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, UK
| | - Clive G Ballard
- Wolfson Centre for Age-Related Diseases, King's College London, London, UK
| | - Dag Aarsland
- Department of Neurobiology, Ward Sciences and Society, Karolinska Institute, Stockholm, Sweden.,Centre for Age-Related Medicine, Stavanger University Hospital, Stavanger, Norway
| | - Paul T Francis
- Wolfson Centre for Age-Related Diseases, King's College London, London, UK
| | - Christopher P Chen
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Mitchell K P Lai
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Wolfson Centre for Age-Related Diseases, King's College London, London, UK
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Patel T, Brookes KJ, Turton J, Chaudhury S, Guetta-Baranes T, Guerreiro R, Bras J, Hernandez D, Singleton A, Francis PT, Hardy J, Morgan K. Whole-exome sequencing of the BDR cohort: evidence to support the role of the PILRA gene in Alzheimer's disease. Neuropathol Appl Neurobiol 2018; 44:506-521. [PMID: 29181857 DOI: 10.1111/nan.12452] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Accepted: 11/22/2017] [Indexed: 02/03/2023]
Abstract
AIM Late-onset Alzheimer's disease (LOAD) accounts for 95% of all Alzheimer's cases and is genetically complex in nature. Overlapping clinical and neuropathological features between AD, FTD and Parkinson's disease highlight the potential role of genetic pleiotropy across diseases. Recent genome-wide association studies (GWASs) have uncovered 20 new loci for AD risk; however, these exhibit small effect sizes. Using NGS, here we perform association analyses using exome-wide and candidate-gene-driven approaches. METHODS Whole-exome sequencing was performed on 132 AD cases and 53 control samples. Exome-wide single-variant association and gene burden tests were performed for 76 640 nonsingleton variants. Samples were also screened for known causative mutations in familial genes in AD and other dementias. Single-variant association and burden analysis was also carried out on variants in known AD and other neurological dementia genes. RESULTS Tentative single-variant and burden associations were seen in several genes with kinase and protease activity. Exome-wide burden analysis also revealed significant burden of variants in PILRA (P = 3.4 × 10-5 ), which has previously been linked to AD via GWAS, hit ZCWPW1. Screening for causative mutations in familial AD and other dementia genes revealed no pathogenic variants. Variants identified in ABCA7, SLC24A4, CD33 and LRRK2 were nominally associated with disease (P < 0.05) but did not withstand correction for multiple testing. APOE (P = 0.02) and CLU (P = 0.04) variants showed significant burden on AD. CONCLUSIONS In addition, polygenic risk scores (PRS) were able to distinguish between cases and controls with 83.8% accuracy using 3268 variants, sex, age at death and APOE ε4 and ε2 status as predictors.
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Affiliation(s)
- T Patel
- Human Genetics Group, University of Nottingham, Nottingham, UK
| | - K J Brookes
- Human Genetics Group, University of Nottingham, Nottingham, UK
| | - J Turton
- Human Genetics Group, University of Nottingham, Nottingham, UK
| | - S Chaudhury
- Human Genetics Group, University of Nottingham, Nottingham, UK
| | | | - R Guerreiro
- Department of Molecular Neuroscience, Institute of Neurology, University College London, London, UK.,UK Dementia Research Institute at UCL (UK DRI), London, UK.,Department of Medical Sciences, Institute of Biomedicine-iBiMED, University of Aveiro, Aveiro, Portugal
| | - J Bras
- Department of Molecular Neuroscience, Institute of Neurology, University College London, London, UK.,UK Dementia Research Institute at UCL (UK DRI), London, UK.,Department of Medical Sciences, Institute of Biomedicine-iBiMED, University of Aveiro, Aveiro, Portugal
| | - D Hernandez
- Laboratory of Neurogenetics, National Institute of Aging, National Institute of Health, Bethesda, MD, USA
| | - A Singleton
- Laboratory of Neurogenetics, National Institute of Aging, National Institute of Health, Bethesda, MD, USA
| | - P T Francis
- Brains for Dementia Research Resource, Wolfson Centre for Age Related Diseases, King's College London, London, UK
| | - J Hardy
- Department of Molecular Neuroscience, Institute of Neurology, University College London, London, UK.,UK Dementia Research Institute at UCL (UK DRI), London, UK
| | - K Morgan
- Human Genetics Group, University of Nottingham, Nottingham, UK
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Costello H, Hayes GM, Highton-Williamson E, Nurock S, Hanbury D, Francis PT. A pilot study of potential brain donor satisfaction and attitudes towards telephone assessment. Int J Geriatr Psychiatry 2017; 32:1247-1256. [PMID: 27714914 DOI: 10.1002/gps.4605] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Revised: 09/06/2016] [Accepted: 09/15/2016] [Indexed: 11/11/2022]
Abstract
OBJECTIVE Test the feasibility of assessing cognition, psychiatric symptoms and daily living skills of potential brain donors by telephone and compare satisfaction and attitudes across telephone and face-to-face assessment. METHOD Data were collected from 108 healthy participants from the Brains for Dementia Research cohort. Purposive sampling was used to assess feasibility and a randomised control trial design compared satisfaction and attitudes towards telephone and face-to-face assessment. Non-parametric tests were conducted to compare groups, and logistic regression was performed to assess the relationship between satisfaction and participant characteristics. RESULTS Of the 80 participants offered telephone assessment, 67 (83.8%) agreed, 2 (2.5%) had a significant hearing impairment, 4 (5.0%) had potential memory problems and 7 (8.7%) declined. On average, telephone assessments lasted 38 min and duration was negatively associated with Telephone Interview of Cognitive Status-Modified scores (p = 0.001) and positively associated with age (p = 0.040), Neuropsychiatric Inventory scores (p = 0.019), Geriatric Depression Scale (p = 0.035) and Global Deterioration Scale (p = 0.022). Satisfaction was high in respect to organisational and personal aspects; ratings did not differ significantly across telephone and face-to-face assessment groups and were not related to socio-demographic characteristics. Participants undergoing telephone assessment were significantly more likely to hold positive attitudes towards this mode of assessment. CONCLUSIONS Telephone assessment is feasible, time-efficient and acceptable to healthy, potential brain donors. When used with other assessment modes and within the context of established contact, telephone assessment offers greater flexibility to researchers and participants and represents an effective mechanism for overcoming the challenges of growing, ageing cohorts and uncertain resources. Copyright © 2016 John Wiley & Sons, Ltd.
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Ferrero H, Larrayoz IM, Martisova E, Solas M, Howlett DR, Francis PT, Gil-Bea FJ, Martínez A, Ramírez MJ. Increased Levels of Brain Adrenomedullin in the Neuropathology of Alzheimer’s Disease. Mol Neurobiol 2017; 55:5177-5183. [DOI: 10.1007/s12035-017-0700-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Accepted: 07/31/2017] [Indexed: 12/14/2022]
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Datta A, Chai YL, Tan JM, Lee JH, Francis PT, Chen CP, Sze SK, Lai MKP. An iTRAQ-based proteomic analysis reveals dysregulation of neocortical synaptopodin in Lewy body dementias. Mol Brain 2017; 10:36. [PMID: 28800743 PMCID: PMC5553757 DOI: 10.1186/s13041-017-0316-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 07/21/2017] [Indexed: 02/08/2023] Open
Abstract
Lewy body dementias are the second most common cause of neurodegenerative dementia in the elderly after Alzheimer's disease (AD). The two clinical subgroups of Lewy body dementias, namely, dementia with Lewy bodies (DLB) and Parkinson's disease dementia (PDD), are differentiated by the chronology of cognitive symptoms relative to parkinsonism. At present, there remains a debate on whether DLB and PDD are separate disease entities, or fall within the same spectrum of Lewy body dementias. In this study, we compared the detergent-soluble proteome via an 8-plex isobaric tag for relative and absolute quantitation (iTRAQ) analysis of pooled lysates from the prefrontal cortex (BA9) of DLB (n = 19) and PDD (n = 21) patients matched a priori for amyloid (total Aβ42) burden, semi-quantitative scores for Lewy bodies and neurofibrillary tangles together with age-matched control (n = 21) subjects. A total of 1914 proteins were confidently identified by iTRAQ (false discovery rate = 0%). None of the proteins showed a significant yet opposite regulation in between DLB and PDD when compared to aged controls in the proteomic data set as well as following immunoblot analysis of the pooled and individual lysates involving all 61 subjects. The postsynaptic protein, synaptopodin (SYNPO) was significantly down-regulated in both DLB and PDD subgroups, suggesting a defective synaptic transmission in the demented patients. In conclusion, the largely similar proteome of DLB and PDD matched for amyloid burden suggests that variations in concomitant AD-related pathology, abnormal post-translational modifications or protein-protein interactions, defective intracellular trafficking or misfolding of proteins could play a part in driving the clinically observed differences between these two subgroups of Lewy body dementias. This further indicates that amyloid-targeting therapeutic strategies may show different efficacies in DLB versus PDD.
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Affiliation(s)
- Arnab Datta
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Unit 09-01, Centre for Translational Medicine (MD6), 14 Medical Drive, Kent Ridge, Singapore 117599, Singapore. .,Epithelial Systems Biology Laboratory, National Heart, Lung, and Blood Institute, Building 10 Room 6N318, Bethesda, MD 20814, USA.
| | - Yuek Ling Chai
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Unit 09-01, Centre for Translational Medicine (MD6), 14 Medical Drive, Kent Ridge, Singapore 117599, Singapore
| | - Jing Min Tan
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Unit 09-01, Centre for Translational Medicine (MD6), 14 Medical Drive, Kent Ridge, Singapore 117599, Singapore
| | - Jasinda H Lee
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Unit 09-01, Centre for Translational Medicine (MD6), 14 Medical Drive, Kent Ridge, Singapore 117599, Singapore
| | - Paul T Francis
- Wolfson Centre for Age-related Diseases, King's College London, Guy's Campus, St Thomas Street, London SE1 1UL, UK
| | - Christopher P Chen
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Unit 09-01, Centre for Translational Medicine (MD6), 14 Medical Drive, Kent Ridge, Singapore 117599, Singapore
| | - Siu Kwan Sze
- School of Biological Sciences, Nanyang Technological University, Singapore 637551, Singapore
| | - Mitchell K P Lai
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Unit 09-01, Centre for Translational Medicine (MD6), 14 Medical Drive, Kent Ridge, Singapore 117599, Singapore. .,Wolfson Centre for Age-related Diseases, King's College London, Guy's Campus, St Thomas Street, London SE1 1UL, UK.
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Patel T, Brookes KJ, Guetta‐Baranes T, Chappell S, Guerreiro R, Bras JT, Hardy J, Francis PT, Morgan K. [P3–112]: INVESTIGATING GENETIC VARIATION IN ALZHEIMER's DISEASE USING WHOLE‐EXOME SEQUENCING. Alzheimers Dement 2017. [DOI: 10.1016/j.jalz.2017.06.1323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Tulsi Patel
- University of NottinghamNottinghamUnited Kingdom
| | | | | | | | | | | | - John Hardy
- UCL Institute of NeurologyLondonUnited Kingdom
| | | | - Kevin Morgan
- University of NottinghamNottinghamUnited Kingdom
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Hayes GM, Costello H, Francis PT. [P2–428]: ANALYSIS OF PARTICIPANTS WITHDRAWING FROM A COHORT CONSENTING TO BRAIN DONATION AT DEATH AND DETAILED PSYCHOMETRIC ASSESSMENTS DURING LIFE. Alzheimers Dement 2017. [DOI: 10.1016/j.jalz.2017.06.1084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Gillian M. Hayes
- King's College London, Wolfson Centre for Age Related DiseasesLondonUnited Kingdom
| | - Helen Costello
- King's College London, Wolfson Centre for Age Related DiseasesLondonUnited Kingdom
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Lai MK, Xing H, Chong JR, Chai YL, Aarsland D, Francis PT, Chen CP. [P1–456]: INCREASED PSER129 α‐SYNUCLEIN IS ASSOCIATED WITH SYNAPTIC DEFICITS IN DEMENTIA WITH LEWY BODIES. Alzheimers Dement 2017. [DOI: 10.1016/j.jalz.2017.06.472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mitchell K.P. Lai
- Yong Loo Lin School of Medicine, National University of SingaporeKent RidgeSingapore
| | - Huayang Xing
- Yong Loo Lin School of Medicine, National University of SingaporeKent RidgeSingapore
| | - Joyce R. Chong
- Yong Loo Lin School of Medicine, National University of SingaporeKent RidgeSingapore
| | - Yuek Ling Chai
- Yong Loo Lin School of Medicine, National University of SingaporeKent RidgeSingapore
| | - Dag Aarsland
- King's College LondonLondonUnited Kingdom
- Stavanger University HospitalStavangerNorway
| | | | - Christopher P. Chen
- Yong Loo Lin School of Medicine, National University of SingaporeKent RidgeSingapore
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Hortobagyi T, Alghamdi A, Whitfield D, Vallortigara J, Howlett D, Broadstock M, Ballard C, Thomas A, Attems J, Aarsland D, Francis PT. [P2–204]: RPT6, 20S α‐6 AND α‐3 PROTEASOME SUBUNIT LEVELS AND ASSOCIATION WITH COGNITIVE DECLINE IN ALZHEIMER's DISEASE AND LEWY BODY DEMENTIAS. Alzheimers Dement 2017. [DOI: 10.1016/j.jalz.2017.06.855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Tibor Hortobagyi
- King's College LondonLondonUnited Kingdom
- University of DebrecenDebrecenHungary
| | - Amani Alghamdi
- King's College LondonLondonUnited Kingdom
- King Saud UniversityCollege of ScienceRiyadhSaudi Arabia
| | | | | | | | | | - Clive Ballard
- King's College LondonLondonUnited Kingdom
- University of Exeter Medical SchoolExeterUnited Kingdom
| | - Alan Thomas
- Newcastle UniversityNewcastle upon TyneUnited Kingdom
| | | | - Dag Aarsland
- King's College LondonLondonUnited Kingdom
- Stavanger University HospitalStavangerNorway
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