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Kalaria R, Maestre G, Mahinrad S, Acosta DM, Akinyemi RO, Alladi S, Allegri RF, Arshad F, Babalola DO, Baiyewu O, Bak TH, Bellaj T, Brodie-Mends DK, Carrillo MC, Celestin KKM, Damasceno A, de Silva RK, de Silva R, Djibuti M, Dreyer AJ, Ellajosyula R, Farombi TH, Friedland RP, Garza N, Gbessemehlan A, Georgiou EEZ, Govia I, Grinberg LT, Guerchet M, Gugssa SA, Gumikiriza-Onoria JL, Hogervorst E, Hornberger M, Ibanez A, Ihara M, Issac TG, Jönsson L, Karanja WM, Lee JH, Leroi I, Livingston G, Manes FF, Mbakile-Mahlanza L, Miller BL, Musyimi CW, Mutiso VN, Nakasujja N, Ndetei DM, Nightingale S, Novotni G, Nyamayaro P, Nyame S, Ogeng'o JA, Ogunniyi A, de Oliveira MO, Okubadejo NU, Orrell M, Paddick SM, Pericak-Vance MA, Pirtosek Z, Potocnik FCV, Raman R, Rizig M, Rosselli M, Salokhiddinov M, Satizabal CL, Sepulveda-Falla D, Seshadri S, Sexton CE, Skoog I, George-Hyslop PHS, Suemoto CK, Thapa P, Udeh-Momoh CT, Valcour V, Vance JM, Varghese M, Vera JH, Walker RW, Zetterberg H, Zewde YZ, Ismail O. The 2022 symposium on dementia and brain aging in low- and middle-income countries: Highlights on research, diagnosis, care, and impact. Alzheimers Dement 2024. [PMID: 38696263 DOI: 10.1002/alz.13836] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 02/27/2024] [Accepted: 02/28/2024] [Indexed: 05/04/2024]
Abstract
Two of every three persons living with dementia reside in low- and middle-income countries (LMICs). The projected increase in global dementia rates is expected to affect LMICs disproportionately. However, the majority of global dementia care costs occur in high-income countries (HICs), with dementia research predominantly focusing on HICs. This imbalance necessitates LMIC-focused research to ensure that characterization of dementia accurately reflects the involvement and specificities of diverse populations. Development of effective preventive, diagnostic, and therapeutic approaches for dementia in LMICs requires targeted, personalized, and harmonized efforts. Our article represents timely discussions at the 2022 Symposium on Dementia and Brain Aging in LMICs that identified the foremost opportunities to advance dementia research, differential diagnosis, use of neuropsychometric tools, awareness, and treatment options. We highlight key topics discussed at the meeting and provide future recommendations to foster a more equitable landscape for dementia prevention, diagnosis, care, policy, and management in LMICs. HIGHLIGHTS: Two-thirds of persons with dementia live in LMICs, yet research and costs are skewed toward HICs. LMICs expect dementia prevalence to more than double, accompanied by socioeconomic disparities. The 2022 Symposium on Dementia in LMICs addressed advances in research, diagnosis, prevention, and policy. The Nairobi Declaration urges global action to enhance dementia outcomes in LMICs.
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Affiliation(s)
- Raj Kalaria
- Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, UK
| | - Gladys Maestre
- Departments of Neuroscience and Human Genetics, University of Texas Rio Grande Valley, One W. University Blvd, Brownsville, Texas, USA
| | - Simin Mahinrad
- Division of Medical and Scientific Relations, Alzheimer's Association, Chicago, Illinois, USA
| | - Daisy M Acosta
- Universidad Nacional Pedro Henriquez Urena (UNPHU), Santo Domingo, Dominican Republic
| | - Rufus Olusola Akinyemi
- Neuroscience and Ageing Research Unit, Institute for Advanced Medical Research and Training, College of Medicine, University of Ibadan, Ibadan, Oyo, Nigeria
| | - Suvarna Alladi
- Department of Neurology, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Ricardo F Allegri
- Fleni Neurological Institute, Buenos Aires, Argentina
- Department of Neurosciences, Universidad de la Costa (CUC), Barranquilla, Colombia
| | - Faheem Arshad
- Department of Neurology, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | | | - Olusegun Baiyewu
- Department of Psychiatry, University of Ibadan, Ibadan, Oyo, Nigeria
| | | | | | | | - Maria C Carrillo
- Division of Medical and Scientific Relations, Alzheimer's Association, Chicago, Illinois, USA
| | - Kaputu-Kalala-Malu Celestin
- Department of Neurology, Centre Neuropsychopathologique (CNPP), Kinshasa University Teaching Hospital, University of Kinshasa, Kinshasa, Republic Democratic of the Congo
| | | | - Ranil Karunamuni de Silva
- Interdisciplinary Centre for Innovation in Biotechnology and Neuroscience, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
- Institute for Combinatorial Advanced Research and Education (KDU-CARE), General Sir John Kotelawala Defence University, Ratmalana, Sri Lanka
| | - Rohan de Silva
- Reta Lila Weston Institute and Department of Clinical, Movement Neuroscience, UCL Queen Square Institute of Neurology, London, UK
| | - Mamuka Djibuti
- Partnership for Research and Action for Health (PRAH), Tbilisi, Georgia
| | | | - Ratnavalli Ellajosyula
- Cognitive Neurology Clinic, Manipal Hospital, and Annasawmy Mudaliar Hospital, Bengaluru, Karnataka, India
- Manipal Academy of Higher Education (MAHE), Manipal, Karnataka, India
| | - Temitope H Farombi
- Tony Anenih Geriatric Center, University College Hospital, Ibadan, Oyo, Nigeria
| | | | - Noe Garza
- Department of Neuroscience and Human Genetics, University of Texas Rio Grande Valley, Harlingen, Texas, USA
| | - Antoine Gbessemehlan
- Inserm U1094, IRD U270, University of Limoges, CHU Limoges, EpiMaCT - Epidemiology of Chronic Diseases in Tropical Zone, Institute of Epidemiology and Tropical Neurology, OmegaHealth, Limoges, France
- Inserm, Bordeaux Population Health Research Center, University of Bordeaux, Bordeaux, France
| | - Eliza Eleni-Zacharoula Georgiou
- Department of Psychiatry, Patras University General Hospital, Faculty of Medicine, School of Health Sciences, University of Patras, Patras, Greece
| | - Ishtar Govia
- Caribbean Institute for Health Research, The University of the West Indies, Jamaica, West Indies, Jamaica
- Institute for Global Health, University College London, London, UK
| | - Lea T Grinberg
- Department of Neurology and Pathology, University of California San Francisco, San Francisco, California, USA
- Department of Pathology, University of Sao Paulo, R. da Reitoria, R. Cidade Universitária, São Paulo, Sao Paulo, Brazil
| | - Maëlenn Guerchet
- Inserm U1094, IRD U270, University of Limoges, CHU Limoges, EpiMaCT - Epidemiology of Chronic Diseases in Tropical Zone, Institute of Epidemiology and Tropical Neurology, OmegaHealth, Limoges, France
| | - Seid Ali Gugssa
- Department of Neurology, School of Medicine, Addis Ababa University, Addis Ababa, Ethiopia
| | | | - Eef Hogervorst
- Loughborough University, Loughborough, UK
- Respati University, Yogyakarta, Indonesia
| | | | - Agustin Ibanez
- Latin American Institute for Brain Health (BrainLat), Universidad Adolfo Ibanez, Peñalolén, Santiago, Chile
- Global Brain Health Institute (GBHI), University California San Francisco (UCSF), San Francisco, California, USA
- Global Brain Health Institute (GBHI), Trinity College Dublin, Lloyd Building Trinity College Dublin, Dublin, Ireland
- Cognitive Neuroscience Center (CNC), Universidad de San Andrés, and National Scientific and Technical Research Council (CONICET), Victoria, Provincia de Buenos Aires, Argentina
| | - Masafumi Ihara
- Department of Neurology, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - Thomas Gregor Issac
- Centre for Brain Research, Indian Institute of Science (IISc), Bengaluru, Karnataka, India
| | - Linus Jönsson
- Department of Neurobiology, Care Science and Society, section for Neurogeriatrics, Karolinska Institute, Solnavägen, Solna, Sweden
| | - Wambui M Karanja
- Global Brain Health Institute (GBHI), Trinity College Dublin, Lloyd Building Trinity College Dublin, Dublin, Ireland
- Brain and Mind Institute, Aga Khan University, Nairobi, Kenya
| | - Joseph H Lee
- Sergievsky Center, Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Departments of Neurology and Epidemiology, Columbia University, New York, New York, USA
| | - Iracema Leroi
- Global Brain Health Institute (GBHI), Trinity College Dublin, Lloyd Building Trinity College Dublin, Dublin, Ireland
| | | | - Facundo Francisco Manes
- Institute of Cognitive and Translational Neuroscience (INCYT), INECO Foundation, Favaloro University, Buenos Aires, Argentina
| | - Lingani Mbakile-Mahlanza
- Global Brain Health Institute (GBHI), University California San Francisco (UCSF), San Francisco, California, USA
- University of Botswana, Gaborone, Botswana
| | - Bruce L Miller
- Department of Neurology, Memory and Aging Center, University of California San Francisco Weill Institute for Neurosciences, San Francisco, California, USA
| | | | - Victoria N Mutiso
- Africa Mental Health Research and Training Foundation, Nairobi, Kenya
- Department of Psychiatry, University of Nairobi, Nairobi, Kenya
- World Psychiatric Association Collaborating Centre for Research and Training, Nairobi, Kenya
| | | | - David M Ndetei
- Africa Mental Health Research and Training Foundation, Nairobi, Kenya
- Department of Psychiatry, University of Nairobi, Nairobi, Kenya
- World Psychiatric Association Collaborating Centre for Research and Training, Nairobi, Kenya
| | - Sam Nightingale
- Neuroscience Institute, University of Cape Town, Cape Town, South Africa
| | - Gabriela Novotni
- University Clinic of Neurology, Medical Faculty University Ss Cyril and Methodius Institute for Alzheimer's Disease and Neuroscience, Skopje, North Macedonia
| | - Primrose Nyamayaro
- Global Brain Health Institute (GBHI), Trinity College Dublin, Lloyd Building Trinity College Dublin, Dublin, Ireland
- Faculty of Medicine and Health Sciences, University of Zimbabwe, Harare, Zimbabwe
| | - Solomon Nyame
- Kintampo Health Research Centre, Ghana Health Service, Hospital Road, Near Kintampo-north Municipal Hospital, Kintampo, Ghana
| | | | | | - Maira Okada de Oliveira
- Global Brain Health Institute (GBHI), University California San Francisco (UCSF), San Francisco, California, USA
- Global Brain Health Institute (GBHI), Trinity College Dublin, Lloyd Building Trinity College Dublin, Dublin, Ireland
- Department of Psychiatry at Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
- Cognitive Neurology and Behavioral Unit (GNCC), University of Sao Paulo, R. da Reitoria, R. Cidade Universitária, São Paulo, Sao Paulo, Brazil
| | - Njideka U Okubadejo
- Neurology Unit, Department of Medicine, Faculty of Clinical Sciences, College of Medicine, University of Lagos, Yaba, Lagos, Nigeria
| | - Martin Orrell
- Institute of Mental Health, University of Nottingham, Nottingham, UK
| | - Stella-Maria Paddick
- Newcastle University, Newcastle upon Tyne, UK
- Gateshead Health NHS Foundation Trust, Sheriff Hill, Tyne and Wear, UK
| | - Margaret A Pericak-Vance
- John P Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Coral Gables, Florida, USA
- Dr. John T Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Coral Gables, Florida, USA
| | - Zvezdan Pirtosek
- Faculty of Medicine, University Medical Centre Ljubljana, Ljubljana, Slovenia
| | - Felix Claude Victor Potocnik
- Old Age Psychiatry Unit, Depth Psychiatry, Stellenbosch University, Western Cape, Stellenbosch Central, Stellenbosch, South Africa
| | - Rema Raman
- Alzheimer's Therapeutic Research Institute, University of Southern California, Los Angeles, California, USA
| | - Mie Rizig
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, Queen Square, London, UK
| | - Mónica Rosselli
- Department of Psychology, Charles E. Schmidt College of Science, Florida Atlantic University, Boca Raton, Florida, USA
- Florida Alzheimer's Disease Research Center, Gainesville, Florida, USA
| | | | - Claudia L Satizabal
- Glenn Biggs Institute for Alzheimer's & Neurodegenerative Diseases, University of Texas Health Sciences Center, San Antonio, Texas, USA
- Department of Neurology, Boston University School of Medicine, Boston, Massachusetts, USA
- The Framingham Heart Study, Framingham, Massachusetts, USA
| | - Diego Sepulveda-Falla
- Molecular Neuropathology of Alzheimer's Disease, Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Sudha Seshadri
- Glenn Biggs Institute for Alzheimer's and Neurodegenerative Diseases and South Texas ADRC, UT Health San Antonio, San Antonio, Texas, USA
- University of Texas Health Sciences Center, San Antonio, Texas, USA
| | - Claire E Sexton
- Division of Medical and Scientific Relations, Alzheimer's Association, Chicago, Illinois, USA
| | - Ingmar Skoog
- Institute of Neuroscience and Fysiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Peter H St George-Hyslop
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Department of Neurology, Columbia University Irving Medical Center, New York, New York, USA
- Cambridge Institute for Medical Research and Department of Clinical Neurosciences, School of Clinical Medicine, University of Cambridge, Addenbrookes Biomedical Campus, Trumpington, Cambridge, UK
- Department of Medicine (Neurology), Temerty Faculty of Medicine, University of Toronto, and University Health Network, 27 King's College Cir, Toronto, Ontario, Canada
| | - Claudia Kimie Suemoto
- Division of Geriatrics, University of Sao Paulo Medical School, R. da Reitoria, R. Cidade Universitária, São Paulo, Sao Paulo, Brazil
| | - Prekshy Thapa
- Global Brain Health Institute (GBHI), Trinity College Dublin, Lloyd Building Trinity College Dublin, Dublin, Ireland
| | - Chinedu Theresa Udeh-Momoh
- Global Brain Health Institute (GBHI), University California San Francisco (UCSF), San Francisco, California, USA
- FINGERS Brain Health Institute, c/o Stockholms Sjukhem, Stockholm, Sweden
- Department of Epidemiology and Prevention, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
- Department of Neurobiology, Care Sciences and Society (NVS), Division of Clinical Geriatrics, Karolinska Institute, Solnavägen, Solna, Sweden
- Imarisha Centre for Brain health and Aging, Brain and Mind Institute, Aga Khan University, Nairobi, Kenya
| | - Victor Valcour
- Memory and Aging Center, Department of Neurology, University of California, San Francisco, California, USA
| | - Jeffery M Vance
- John P Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, Coral Gables, Florida, USA
| | - Mathew Varghese
- St. John's Medical College, Sarjapur - Marathahalli Rd, beside Bank Of Baroda, John Nagar, Koramangala, Bengaluru, Karnataka, India
| | - Jaime H Vera
- Department of Global Health and Infection, Brighton and Sussex Medical School, Brighton, UK
| | - Richard W Walker
- Population Health Sciences Institute, Newcastle University, Newcastle upon Tyne, UK
| | - Henrik Zetterberg
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, the Sahlgrenska Academy at the University of Gothenburg, Göteborg, Sweden
- Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden
- Department of Neurodegenerative Disease, UCL Institute of Neurology, Queen Square, Queen Square, London, UK
- UK Dementia Research Institute at UCL, University College London, London, UK
- Hong Kong Center for Neurodegenerative Diseases, Clear Water Bay, Hong Kong, China
- Wisconsin Alzheimer's Disease Research Center, University of Wisconsin School of Medicine and Public Health, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Yared Z Zewde
- Department of Neurology, School of Medicine, Addis Ababa University, Addis Ababa, Ethiopia
| | - Ozama Ismail
- Division of Medical and Scientific Relations, Alzheimer's Association, Chicago, Illinois, USA
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Kelly L, Brown C, Michalik D, Hawkes CA, Aldea R, Agarwal N, Salib R, Alzetani A, Ethell DW, Counts SE, de Leon M, Fossati S, Koronyo‐Hamaoui M, Piazza F, Rich SA, Wolters FJ, Snyder H, Ismail O, Elahi F, Proulx ST, Verma A, Wunderlich H, Haack M, Dodart JC, Mazer N, Carare RO. Clearance of interstitial fluid (ISF) and CSF (CLIC) group-part of Vascular Professional Interest Area (PIA), updates in 2022-2023. Cerebrovascular disease and the failure of elimination of Amyloid-β from the brain and retina with age and Alzheimer's disease: Opportunities for therapy. Alzheimers Dement 2024; 20:1421-1435. [PMID: 37897797 PMCID: PMC10917045 DOI: 10.1002/alz.13512] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 06/16/2023] [Revised: 08/30/2023] [Accepted: 08/30/2023] [Indexed: 10/30/2023]
Abstract
This editorial summarizes advances from the Clearance of Interstitial Fluid and Cerebrospinal Fluid (CLIC) group, within the Vascular Professional Interest Area (PIA) of the Alzheimer's Association International Society to Advance Alzheimer's Research and Treatment (ISTAART). The overarching objectives of the CLIC group are to: (1) understand the age-related physiology changes that underlie impaired clearance of interstitial fluid (ISF) and cerebrospinal fluid (CSF) (CLIC); (2) understand the cellular and molecular mechanisms underlying intramural periarterial drainage (IPAD) in the brain; (3) establish novel diagnostic tests for Alzheimer's disease (AD), cerebral amyloid angiopathy (CAA), retinal amyloid vasculopathy, amyloid-related imaging abnormalities (ARIA) of spontaneous and iatrogenic CAA-related inflammation (CAA-ri), and vasomotion; and (4) establish novel therapies that facilitate IPAD to eliminate amyloid β (Aβ) from the aging brain and retina, to prevent or reduce AD and CAA pathology and ARIA side events associated with AD immunotherapy.
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Affiliation(s)
- Louise Kelly
- Faculty of MedicineUniversity of SouthamptonSouthamptonHampshireUK
| | | | - Daniel Michalik
- Faculty of MedicineUniversity of SouthamptonSouthamptonHampshireUK
| | | | - Roxana Aldea
- Roche Pharma Research & Early DevelopmentRoche Innovation Center BaselBaselSwitzerland
| | - Nivedita Agarwal
- Neuroradiology sectionScientific Institute IRCCS Eugenio MedeaBosisio Parini, LCItaly
| | - Rami Salib
- Faculty of MedicineUniversity of SouthamptonSouthamptonHampshireUK
| | - Aiman Alzetani
- Faculty of MedicineUniversity of SouthamptonSouthamptonHampshireUK
| | | | - Scott E. Counts
- Dept. Translational NeuroscienceDept. Family MedicineMichigan State UniversityGrand RapidsMichiganUSA
| | - Mony de Leon
- Brain Health Imaging InstituteDepartment of RadiologyWeill Cornell MedicineNew YorkNew YorkUSA
| | | | - Maya Koronyo‐Hamaoui
- Departments of NeurosurgeryNeurology, and Biomedical SciencesMaxine Dunitz Neurosurgical Research InstituteCedars‐Sinai Medical CenterLos AngelesCaliforniaUSA
| | | | | | | | - Heather Snyder
- Alzheimer's AssociationMedical & Scientific RelationsChicagoIllinoisUSA
| | - Ozama Ismail
- Icahn School of Medicine at Mount SinaiNew YorkNew YorkUSA
| | - Fanny Elahi
- Icahn School of Medicine at Mount SinaiNew YorkNew YorkUSA
| | | | - Ajay Verma
- Formation Venture Engineering FoundryTopsfieldMassachusettsUSA
| | | | | | | | | | - Roxana O. Carare
- Faculty of MedicineUniversity of SouthamptonSouthamptonHampshireUK
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Higgins V, Beriault D, Mostafa A, Estey M, Agbor T, Ismail O, Parker ML. Variation in Processes and Reporting of Cerebrospinal Fluid Oligoclonal Banding and Associated Tests and Calculated Indices across Canadian Clinical Laboratories. Clin Biochem 2023; 116:105-112. [PMID: 37100108 DOI: 10.1016/j.clinbiochem.2023.04.006] [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: 12/20/2022] [Revised: 04/12/2023] [Accepted: 04/17/2023] [Indexed: 04/28/2023]
Abstract
OBJECTIVES Multiple sclerosis is diagnosed based on clinical and laboratory findings, including cerebrospinal fluid (CSF) oligoclonal banding (OCB) analysis. The lack of updated CSF OCB laboratory guidelines in Canada has likely led to variation in processes and reporting across clinical laboratories. As a first step to developing harmonized laboratory recommendations, we examined current CSF OCB processes, reporting, and interpretation across all Canadian clinical laboratories currently performing this test. DESIGN AND METHODS A survey of 39 questions was sent to clinical chemists at all 13 Canadian clinical laboratories performing CSF OCB analysis. The survey included questions regarding quality control processes, reporting practices for CSF gel electrophoresis pattern interpretation, and associated tests and calculated indices. RESULTS The survey response rate was 100%. Most (10/13) laboratories use ≥2 CSF-specific bands (2017 McDonald Criteria) as their CSF OCB positivity cut-off and only 2/13 report the number of bands with every report. Most (8/13 and 9/13) laboratories report an inflammatory response pattern and monoclonal gammopathy pattern, respectively. However, the process for reporting and/or confirming a monoclonal gammopathy varies widely. Variation was observed for reference intervals, units, and the panel of reported associated tests and calculated indices. The maximum acceptable time interval between paired CSF and serum collections varied from 24 hours to no limit. CONCLUSIONS Profound variation exists in processes, reporting, and interpretation of CSF OCB and associated tests and indices across Canadian clinical laboratories. Harmonization of CSF OCB analysis is required to ensure continuity and quality of patient care. Our detailed assessment of current practice variation highlights the need for clinical stakeholder engagement and further data analysis to support optimal interpretation and reporting practices, which will aid in developing harmonized laboratory recommendations.
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Affiliation(s)
- V Higgins
- DynaLIFE Medical Labs, Edmonton, AB, Canada; Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada.
| | - D Beriault
- Department of Laboratory Medicine, St. Michael's Hospital, Toronto, ON, Canada; Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, ON, Canada; Department of Laboratory Medicine & Pathobiology, University of Toronto, Toronto, ON, Canada
| | - A Mostafa
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada
| | - M Estey
- DynaLIFE Medical Labs, Edmonton, AB, Canada; Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada
| | - T Agbor
- DynaLIFE Medical Labs, Edmonton, AB, Canada; Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada
| | - O Ismail
- DynaLIFE Medical Labs, Edmonton, AB, Canada; Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada
| | - M L Parker
- DynaLIFE Medical Labs, Edmonton, AB, Canada; Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, AB, Canada
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Maestre G, Carrillo M, Kalaria R, Acosta D, Adams L, Adoukonou T, Akinwande K, Akinyemi J, Akinyemi R, Akpa O, Alladi S, Allegri R, Arizaga R, Arshad F, Arulogun O, Babalola D, Baiyewu O, Bak T, Bellaj T, Boshe J, Brayne C, Brodie-Mends D, Brown R, Cahn J, Cyrille N, Damasceno A, de Silva R, de Silva R, Djibuti M, Dreyer AJ, Ellajosyula R, Farombi T, Fongang B, Forner S, Friedland R, Garza N, Gbessemehlan A, Georgiou EEZ, Gouider R, Govia I, Grinberg L, Guerchet M, Gugssa S, Gumikiriza-Onoria JL, Gustafson D, Hogervorst E, Hornberger M, Ibanez A, Ihara M, Ismail O, Issac T, Jönsson L, Kaputu C, Karanja W, Karungi J, Tshala-Katumbay D, Kunkle B, Lee JH, Leroi I, Lewis R, Livingston G, Lopera F, Lwere K, Manes F, Mbakile-Mahlanza L, Mena P, Miller B, Millogo A, Mohamed A, Musyimi C, Mutiso V, Nakasujja N, Ndetei D, Nightingale S, Njamnshi AK, Novotni G, Nyamayaro P, Nyame S, Ogeng'o J, Ogunniyi A, Okada De Oliveira M, Okubadejo N, Orrell M, Orunmuyi A, Owolabi M, Paddick S, A Pericak-Vance M, Pirtosek Z, Potocnik F, Preston B, Raman R, Ranchod K, Rizig M, Rosselli M, Deepa R, Roy U, Salokhiddinov M, Sano M, Sarfo F, Satizabal CL, Sepulveda-Falla D, Seshadri S, Sexton C, Skoog I, St George-Hyslop P, Suemoto C, Tanner J, Thapa P, Toure K, Ucheagwu V, Udeh-Momoh C, Valcour V, Vance J, Varghese M, Vera J, Walker R, Weidner W, Sebastian W, Whitehead Gay P, Zetterberg H, Zewde Y. The Nairobi Declaration-Reducing the burden of dementia in low- and middle-income countries (LMICs): Declaration of the 2022 Symposium on Dementia and Brain Aging in LMICs. Alzheimers Dement 2023; 19:1105-1108. [PMID: 36905253 DOI: 10.1002/alz.13025] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Indexed: 03/12/2023]
Affiliation(s)
- Gladys Maestre
- Departments of Neuroscience and Human Genetics, University of Texas Rio Grande Valley, Brownsville, TX, USA
| | | | - Raj Kalaria
- Translational and Clinical Research Institute, Newcastle University, Campus for Ageing and Vitality, Newcastle upon Tyne, UK
| | - Daisy Acosta
- Internal Medicine Department, Universidad Nacional Pedro Henriquez Ureña, Santo Domingo, Dominican Republic
| | - Larry Adams
- Institute of Human Genomics, University of Miami, Miami, FL, USA
| | | | - Kazeem Akinwande
- Department of Chemical Pathology and Immunology, Federal Medical Centre, Abeokuta, Nigeria
| | | | - Rufus Akinyemi
- Institute for Advanced Medical Research and Training, University of Ibadan, Ibadan, Nigeria
| | - Onoja Akpa
- College of Medicine, University of Ibadan, Ibadan, Nigeria
| | | | - Ricardo Allegri
- Department of Cognitive Neurology, Instituto Neurologico Fleni, Buenos Aires, Argentina
| | - Raul Arizaga
- Neurología Cognitiva y Neuropsicología, Hospital Dr. Cesar Milstein, Buenos Aires, Argentina
| | | | - Oyedunni Arulogun
- Department of Health Promotion and Education, University of Ibadan, Ibadan, Nigeria
| | - David Babalola
- University College Hospital, University of Ibadan, Ibadan, Nigeria
| | | | - Thomas Bak
- Department of Neurology, University of Edinburgh, Edinburgh, UK
| | - Tarek Bellaj
- Department of Psychological Sciences, Qatar University, Doha, Qatar
| | - Judith Boshe
- Department of Medicine, Kilimanjaro Christian Medical College, Moshi, Tanzania
| | - Carol Brayne
- Cambridge Public Health, University of Cambridge, Cambridge, UK
| | | | - Richard Brown
- Department of Psychology, Dalhousie University, Halifax, Canada
| | - Jennifer Cahn
- Departments of Neuroscience and Human Genetics, University of Texas Rio Grande Valley, Brownsville, TX, USA
| | - Nkouonlack Cyrille
- Faculty of Health Sciences, University of Buea, Buea & Brain Research Africa Initiative, Yaounde, Cameroon
| | | | - Ranil de Silva
- Faculty of Medical Sciences, University of Sri Jayewardenepura, Rathmalana, Sri Lanka
| | - Rohan de Silva
- Institute of Neurology, University College London, London, UK
| | - Mamuka Djibuti
- Partnership for Research and Action for Health, Tbilisi, Georgia
| | - Anna Jane Dreyer
- Department of Psychiatry and Mental Health, University of Cape Town, Cape Town, South Africa
| | | | | | - Bernard Fongang
- Glenn Biggs Institute, University of Texas, San Antonio, TX, USA
| | | | - Rob Friedland
- Department of Neurology, University of Louisville, Louisville, USA
| | - Noe Garza
- Departments of Neuroscience and Human Genetics, University of Texas Rio Grande Valley, Harlingen, TX, USA
| | - Antoine Gbessemehlan
- institute of Epidemiology and Tropical Neurology, University of Limoges, Bordeaux, France
| | | | - Riadh Gouider
- Neurology Department, Razi University Hospital, Tunis, Tunisia
| | - Ishtar Govia
- Caribbean Institute for Health Research, University of the West Indies, Kingston, Jamaica
| | - Lea Grinberg
- Department of Neurology, University of San Francisco, San Francisco, CA, USA
| | - Maëlenn Guerchet
- Inserm U1094, IRD UMR270, Univ. Limoges, CHU Limoges, EpiMaCT - Epidemiology of chronic diseases in tropical zone, Institute of Epidemiology and Tropical Neurology, OmegaHealth, Limoges, France
| | - Seid Gugssa
- Department of Neurology, Addis Ababa University, Addis Ababa, Ethiopia
| | | | - Deborah Gustafson
- Department of Neurology, State University of New York Downstate Health Sciences University, Brooklyn, NY, USA
| | - Eef Hogervorst
- Department of Psychology, University of Loughborough, Loughborough, UK
| | | | - Agustin Ibanez
- Global Brain Health Institute, Trinity College, Dublin, Ireland
- Latin American Brain Health Institute (BrainLat), Universidad Adolfo Ibañez, Chile
| | - Masafumi Ihara
- Department of Neurology, National Cerebral and Cardiovascular Center, Suita, Japan
| | | | - Thomas Issac
- Centre for Brain Research (CBR), Indian Institute of Science (IISc), Bengaluru, India
| | - Linus Jönsson
- Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Sweden
| | - Celestin Kaputu
- Department of Neurology, University of Kinshasa, Kinshasa, Democratic Republic of the Congo
| | - Wambui Karanja
- Global Brain Health Institute, Trinity College, Nairobi, Kenya
| | | | | | - Brian Kunkle
- Institute of Human Genomics, University of Miami, Miami, FL, USA
| | - Joseph H Lee
- Sergievsky Center & Taub Institute, Columbia University, New York, NY, USA
| | - Iracema Leroi
- TCIN, Lloyd Building, Trinity College, Dublin, Ireland
| | - Raphaella Lewis
- Department of Psychology, University of Cape Town, Cape Town, South Africa
| | - Gill Livingston
- Department of Psychiatry, University College London, London, UK
| | - Francisco Lopera
- Grupo de Neurociencias de Antioquia, Universidad de Antioquia, Medellin, Colombia
| | - Kamada Lwere
- Department of Medical Microbiology, Makerere University, Mulago, Uganda
| | - Facundo Manes
- Institute of Cognitive and Translational Neuroscience (INCYT), INECO Foundation, Favaloro University, Buenos Aires, Argentina
| | | | - Pedro Mena
- Institute of Human Genomics, University of Miami, Miami, FL, USA
| | - Bruce Miller
- Department of Neurology, University of San Francisco, San Francisco, CA, USA
| | - Athanase Millogo
- Department of Neurology, University of Ouagadougou, Ouagadougou, Burkina Faso
| | - Abdul Mohamed
- Department of Psychology, Linnaeus University, Vaxjo, Sweden
| | - Christine Musyimi
- African Mental Health Research & Training Foundation, Nairobi, Kenya
| | - Victoria Mutiso
- African Mental Health Research & Training Foundation, Nairobi, Kenya
| | | | - David Ndetei
- Africa Mental Health Research and Training Foundation and University of Nairobi, Nairobi, Kenya
| | - Sam Nightingale
- Department of Neurology, University of Cape Town, Cape Town, South Africa
| | - Alfred K Njamnshi
- Department of Neurology, FMBS, The University of Yaoundé I & Brain Research Africa Initiative, Yaounde, Cameroon
| | - Gabriela Novotni
- Department of Neurology, Ss. Cyril and Methodius University, Skopje, North Macedonia
| | | | - Solomon Nyame
- Kintampo Health Research Centre, Ghana Health Service, Kintampo, Ghana
| | - Julius Ogeng'o
- Department of Human Anatomy & Medical Physiology, University of Nairobi, Nairobi, Kenya
| | | | | | - Njideka Okubadejo
- Neurology Unit, Department of Medicine, College of Medicine, University of Lagos, Nigeria
| | - Martin Orrell
- Institute of Mental Health, University of Nottingham, Nottingham, UK
| | - Akintunde Orunmuyi
- Integrated Molecular Imaging Centre, Kenyatta University, Nairobi, Kenya
| | - Mayowa Owolabi
- Center for Genomic and Precision Medicine, College of Medicine, University of Ibadan, Ibadan, Nigeria
| | - Stella Paddick
- Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, UK
| | | | - Zvezdan Pirtosek
- Department of Neurology, Ljubljana University Medical Centre, Ljubljana, Slovenia
| | - Felix Potocnik
- Department of Geriatric Psychiatry, Stellenbosch University, Durbanville, South Africa
| | - Bill Preston
- Roots Worldwide LLC and Innovative California Biosciences International Inc, Fullerton, CA, USA
| | - Rema Raman
- Alzheimer's Therapeutic Research Institute, University of Southern California, San Diego, CA, USA
| | - Kirti Ranchod
- Global Brain Health Institute, Trinity College, Johannesburg, South Africa
| | - Mie Rizig
- UCL Queen Square Institute of Neurology, London, UK
| | - Monica Rosselli
- Department of Psychology, Florida Atlantic University, Miami, FL, USA
| | - Roy Deepa
- Department of Health and Biomedical Science, The University of Texas Rio Grande Valley, Brownsville, TX, USA
| | - Upal Roy
- Department of Health and Biomedical Science, The University of Texas Rio Grande Valley, Brownsville, TX, USA
| | | | - Mary Sano
- Alzheimer's Disease Center, Mount Sinai School of Medicine, Bronx, NY, USA
| | - Fred Sarfo
- Department of Medicine, Kwame Nkrumah University of Science & Technology, Kumasi, Ghana
| | - Claudia L Satizabal
- Glenn Biggs Institute for Alzheimer's and Neurodegenerative Diseases and Department of Population Health Sciences, UT Health San Antonio, San Antonio, Texas, United States
| | - Diego Sepulveda-Falla
- Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Sudha Seshadri
- Glenn Biggs Institute, University of Texas, San Antonio, MA, USA
| | | | - Ingmar Skoog
- Center of Health and Aging (AgeCap), University of Gothenburg, Goteborg, Sweden
| | - Peter St George-Hyslop
- Tanz Centre for Research in Neurodegenerative Diseases and Division of Neurology, University of Toronto, Toronto, Canada
| | - Claudia Suemoto
- Division of Geriatrics, Universidade de São Paulo, São Paulo, Brazil
| | - Jeremy Tanner
- Glenn Biggs Institute, University of Texas, San Antonio, TX, USA
| | - Prekshya Thapa
- Department of Psychiatric Nursing, B.P. Koirala Institute of Health Sciences, Dharan, Nepal
| | - Kamadore Toure
- Department of Neurology, Université de Thiès, Thies, Senegal
| | | | | | - Victor Valcour
- Global Brain Health Institute, University of San Francisco, San Francisco, CA, USA
| | - Jeffery Vance
- Institute of Human Genomics, University of Miami, Miami, FL, USA
| | - Mathew Varghese
- Department of Psychiatry, St John's Medical College, Bangalore, India
| | - Jaime Vera
- Brighton and Sussex Medical School, University of Sussex, Brighton, UK
| | - Richard Walker
- Department of Medicine, North Tyneside General Hospital, North Shields, UK
| | | | - Walsh Sebastian
- Cambridge Public Health, University of Cambridge, Cambridge, UK
| | | | - Henrik Zetterberg
- Clinical Neurochemistry Laboratory, Moelndal Hospital, Moelndal, Sweden
| | - Yared Zewde
- Department of Neurology, Addis Ababa University, Addis Ababa, Ethiopia
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Al-Suwaina Y, Ismail O, Mahmoud H, Abd-Elmajeed M. Evaluation of the impact of agricultural policy on faba bean crop in Egypt. Archives of Agriculture Sciences Journal 2022; 0:249-260. [DOI: 10.21608/aasj.2023.164278.1131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Ismail O, Pike M, Zhang W, Mishra A. Cerebrovascular Dysfunction at the Intersection of Ischemia and Alzheimer’s Disease. Alzheimers Dement 2022. [DOI: 10.1002/alz.066975] [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)
- Ozama Ismail
- Oregon Health & Science University Portland OR USA
| | - Martin Pike
- Oregon Health & Science University Portland OR USA
| | - Wenri Zhang
- Oregon Health & Science University Portland OR USA
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Kong P, Rahim MM, Nazri M, Asung A, Khalip SM, Sabeng K, Ismail O, Kader MSA, Wahab MA. Right atrial pressure may be related to tricuspid E/e’ (ratio of tricuspid inflow early velocity to tricuspid annular early diastolic velocity) in echocardiography. Int J Cardiol 2022. [DOI: 10.1016/j.ijcard.2022.10.126] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Simon M, Wang MX, Ismail O, Braun M, Schindler AG, Reemmer J, Wang Z, Haveliwala MA, O’Boyle RP, Han WY, Roese N, Grafe M, Woltjer R, Boison D, Iliff JJ. Loss of perivascular aquaporin-4 localization impairs glymphatic exchange and promotes amyloid β plaque formation in mice. Alzheimers Res Ther 2022; 14:59. [PMID: 35473943 PMCID: PMC9040291 DOI: 10.1186/s13195-022-00999-5] [Citation(s) in RCA: 42] [Impact Index Per Article: 21.0] [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: 09/21/2021] [Accepted: 04/04/2022] [Indexed: 02/02/2023]
Abstract
BACKGROUND Slowed clearance of amyloid β (Aβ) is believed to underlie the development of Aβ plaques that characterize Alzheimer's disease (AD). Aβ is cleared in part by the glymphatic system, a brain-wide network of perivascular pathways that supports the exchange of cerebrospinal and brain interstitial fluid. Glymphatic clearance, or perivascular CSF-interstitial fluid exchange, is dependent on the astroglial water channel aquaporin-4 (AQP4) as deletion of Aqp4 in mice slows perivascular exchange, impairs Aβ clearance, and promotes Aβ plaque formation. METHODS To define the role of AQP4 in human AD, we evaluated AQP4 expression and localization in a human post mortem case series. We then used the α-syntrophin (Snta1) knockout mouse model which lacks perivascular AQP4 localization to evaluate the effect that loss of perivascular AQP4 localization has on glymphatic CSF tracer distribution. Lastly, we crossed this line into a mouse model of amyloidosis (Tg2576 mice) to evaluate the effect of AQP4 localization on amyloid β levels. RESULTS In the post mortem case series, we observed that the perivascular localization of AQP4 is reduced in frontal cortical gray matter of subjects with AD compared to cognitively intact subjects. This decline in perivascular AQP4 localization was associated with increasing Aβ and neurofibrillary pathological burden, and with cognitive decline prior to dementia onset. In rodent studies, Snta1 gene deletion slowed CSF tracer influx and interstitial tracer efflux from the mouse brain and increased amyloid β levels. CONCLUSIONS These findings suggest that the loss of perivascular AQP4 localization may contribute to the development of AD pathology in human populations.
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Affiliation(s)
- Matthew Simon
- Neuroscience Graduate Program, Oregon Health & Science University, Portland, OR USA
- Department of Anesthesiology and Perioperative Medicine, Oregon Health & Science University, Portland, OR USA
| | - Marie Xun Wang
- Department of Anesthesiology and Perioperative Medicine, Oregon Health & Science University, Portland, OR USA
- Department of Psychiatry and Behavioral Sciences, University of Washington School of Medicine, Seattle, WA USA
| | - Ozama Ismail
- Department of Anesthesiology and Perioperative Medicine, Oregon Health & Science University, Portland, OR USA
- Center for Advanced Biomedical Imaging, University College London, London, UK
| | - Molly Braun
- Department of Psychiatry and Behavioral Sciences, University of Washington School of Medicine, Seattle, WA USA
- VISN 20 Mental Illness Research, Education and Clinical Center (MIRECC), VA Puget Sound Health Care System, 1660 S Columbian Wy., Seattle, WA 98108 USA
| | - Abigail G. Schindler
- Department of Psychiatry and Behavioral Sciences, University of Washington School of Medicine, Seattle, WA USA
- VISN 20 Geriatric Research, Education and Clinical Center (GRECC), VA Puget Sound Health Care System, Seattle, WA USA
| | - Jesica Reemmer
- Robert Stone Dow Neurobiology Laboratories, Legacy Research Institute, Portland, OR USA
| | - Zhongya Wang
- Robert Stone Dow Neurobiology Laboratories, Legacy Research Institute, Portland, OR USA
| | - Mariya A. Haveliwala
- VISN 20 Mental Illness Research, Education and Clinical Center (MIRECC), VA Puget Sound Health Care System, 1660 S Columbian Wy., Seattle, WA 98108 USA
| | - Ryan P. O’Boyle
- VISN 20 Mental Illness Research, Education and Clinical Center (MIRECC), VA Puget Sound Health Care System, 1660 S Columbian Wy., Seattle, WA 98108 USA
| | - Warren Y. Han
- VISN 20 Mental Illness Research, Education and Clinical Center (MIRECC), VA Puget Sound Health Care System, 1660 S Columbian Wy., Seattle, WA 98108 USA
| | - Natalie Roese
- Department of Anesthesiology and Perioperative Medicine, Oregon Health & Science University, Portland, OR USA
| | - Marjorie Grafe
- Department of Pathology, Oregon Health & Science University, Portland, OR USA
| | - Randall Woltjer
- Department of Pathology, Oregon Health & Science University, Portland, OR USA
| | - Detlev Boison
- Department of Neurosurgery, Robert Wood Johnson Medical School, Rutgers University, Piscataway, NJ USA
| | - Jeffrey J. Iliff
- Department of Anesthesiology and Perioperative Medicine, Oregon Health & Science University, Portland, OR USA
- Department of Psychiatry and Behavioral Sciences, University of Washington School of Medicine, Seattle, WA USA
- VISN 20 Mental Illness Research, Education and Clinical Center (MIRECC), VA Puget Sound Health Care System, 1660 S Columbian Wy., Seattle, WA 98108 USA
- Knight Cardiovascular Institute, Oregon Health & Science University, Portland, OR USA
- Department of Neurology, University of Washington School of Medicine, Seattle, WA USA
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Kong P, Rahim MM, Nazri M, Asung A, Khalip SM, Sabeng K, Ismail O. Tricuspid peak inflow velocity of early filling (tricuspid E velocity) could corroborate values of right atrial pressure estimated from assessment of inferior vena cava. Int J Cardiol 2021. [DOI: 10.1016/j.ijcard.2021.10.124] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Harrison IF, Ismail O, Machhada A, Colgan N, Ohene Y, Nahavandi P, Ahmed Z, Fisher A, Meftah S, Murray TK, Ottersen OP, Nagelhus EA, O’Neill MJ, Wells JA, Lythgoe MF. Impaired glymphatic function and clearance of tau in an Alzheimer's disease model. Brain 2020; 143:2576-2593. [PMID: 32705145 PMCID: PMC7447521 DOI: 10.1093/brain/awaa179] [Citation(s) in RCA: 194] [Impact Index Per Article: 48.5] [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: 10/15/2019] [Revised: 03/28/2020] [Accepted: 04/13/2020] [Indexed: 01/09/2023] Open
Abstract
The glymphatic system, that is aquaporin 4 (AQP4) facilitated exchange of CSF with interstitial fluid (ISF), may provide a clearance pathway for protein species such as amyloid-β and tau, which accumulate in the brain in Alzheimer's disease. Further, tau protein transference via the extracellular space, the compartment that is cleared by the glymphatic pathway, allows for its neuron-to-neuron propagation, and the regional progression of tauopathy in the disorder. The glymphatic system therefore represents an exciting new target for Alzheimer's disease. Here we aim to understand the involvement of glymphatic CSF-ISF exchange in tau pathology. First, we demonstrate impaired CSF-ISF exchange and AQP4 polarization in a mouse model of tauopathy, suggesting that this clearance pathway may have the potential to exacerbate or even induce pathogenic accumulation of tau. Subsequently, we establish the central role of AQP4 in the glymphatic clearance of tau from the brain; showing marked impaired glymphatic CSF-ISF exchange and tau protein clearance using the novel AQP4 inhibitor, TGN-020. As such, we show that this system presents as a novel druggable target for the treatment of Alzheimer's disease, and possibly other neurodegenerative diseases alike.
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Affiliation(s)
- Ian F Harrison
- UCL Centre for Advanced Biomedical Imaging, Department of Imaging, Division of Medicine, University College London, London, UK
| | - Ozama Ismail
- UCL Centre for Advanced Biomedical Imaging, Department of Imaging, Division of Medicine, University College London, London, UK
| | - Asif Machhada
- UCL Centre for Advanced Biomedical Imaging, Department of Imaging, Division of Medicine, University College London, London, UK
- Department of Neuroscience, Physiology and Pharmacology, University College London, London, UK
| | - Niall Colgan
- UCL Centre for Advanced Biomedical Imaging, Department of Imaging, Division of Medicine, University College London, London, UK
- School of Physics, National University of Ireland Galway, Ireland
| | - Yolanda Ohene
- UCL Centre for Advanced Biomedical Imaging, Department of Imaging, Division of Medicine, University College London, London, UK
| | - Payam Nahavandi
- UCL Centre for Advanced Biomedical Imaging, Department of Imaging, Division of Medicine, University College London, London, UK
| | - Zeshan Ahmed
- Eli Lilly and Company, Erl Wood Manor, Windlesham, Surrey, UK
| | - Alice Fisher
- Eli Lilly and Company, Erl Wood Manor, Windlesham, Surrey, UK
| | - Soraya Meftah
- Eli Lilly and Company, Erl Wood Manor, Windlesham, Surrey, UK
| | - Tracey K Murray
- Eli Lilly and Company, Erl Wood Manor, Windlesham, Surrey, UK
| | - Ole P Ottersen
- Office of the President, Karolinska Institutet, Stockholm, Sweden
| | - Erlend A Nagelhus
- Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway
| | | | - Jack A Wells
- UCL Centre for Advanced Biomedical Imaging, Department of Imaging, Division of Medicine, University College London, London, UK
| | - Mark F Lythgoe
- UCL Centre for Advanced Biomedical Imaging, Department of Imaging, Division of Medicine, University College London, London, UK
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McLean KA, Ahmed WUR, Akhbari M, Claireaux HA, English C, Frost J, Henshall DE, Khan M, Kwek I, Nicola M, Rehman S, Varghese S, Drake TM, Bell S, Nepogodiev D, McLean KA, Drake TM, Glasbey JC, Borakati A, Drake TM, Kamarajah S, McLean KA, Bath MF, Claireaux HA, Gundogan B, Mohan M, Deekonda P, Kong C, Joyce H, Mcnamee L, Woin E, Burke J, Khatri C, Fitzgerald JE, Harrison EM, Bhangu A, Nepogodiev D, Arulkumaran N, Bell S, Duthie F, Hughes J, Pinkney TD, Prowle J, Richards T, Thomas M, Dynes K, Patel M, Patel P, Wigley C, Suresh R, Shaw A, Klimach S, Jull P, Evans D, Preece R, Ibrahim I, Manikavasagar V, Smith R, Brown FS, Deekonda P, Teo R, Sim DPY, Borakati A, Logan AE, Barai I, Amin H, Suresh S, Sethi R, Bolton W, Corbridge O, Horne L, Attalla M, Morley R, Robinson C, Hoskins T, McAllister R, Lee S, Dennis Y, Nixon G, Heywood E, Wilson H, Ng L, Samaraweera S, Mills A, Doherty C, Woin E, Belchos J, Phan V, Chouari T, Gardner T, Goergen N, Hayes JDB, MacLeod CS, McCormack R, McKinley A, McKinstry S, Milligan W, Ooi L, Rafiq NM, Sammut T, Sinclair E, Smith M, Baker C, Boulton APR, Collins J, Copley HC, Fearnhead N, Fox H, Mah T, McKenna J, Naruka V, Nigam N, Nourallah B, Perera S, Qureshi A, Saggar S, Sun L, Wang X, Yang DD, Caroll P, Doyle C, Elangovan S, Falamarzi A, Perai KG, Greenan E, Jain D, Lang-Orsini M, Lim S, O'Byrne L, Ridgway P, Van der Laan S, Wong J, Arthur J, Barclay J, Bradley P, Edwin C, Finch E, Hayashi E, Hopkins M, Kelly D, Kelly M, McCartan N, Ormrod A, Pakenham A, Hayward J, Hitchen C, Kishore A, Martins T, Philomen J, Rao R, Rickards C, Burns N, Copeland M, Durand C, Dyal A, Ghaffar A, Gidwani A, Grant M, Gribbon C, Gruhn A, Leer M, Ahmad K, Beattie G, Beatty M, Campbell G, Donaldson G, Graham S, Holmes D, Kanabar S, Liu H, McCann C, Stewart R, Vara S, Ajibola-Taylor O, Andah EJE, Ani C, Cabdi NMO, Ito G, Jones M, Komoriyama A, Patel P, Titu L, Basra M, Gallogly P, Harinath G, Leong SH, Pradhan A, Siddiqui I, Zaat S, Ali A, Galea M, Looi WL, Ng JCK, Atkin G, Azizi A, Cargill Z, China Z, Elliot J, Jebakumar R, Lam J, Mudalige G, Onyerindu C, Renju M, Babu VS, Hussain M, Joji N, Lovett B, Mownah H, Ali B, Cresswell B, Dhillon AK, Dupaguntla YS, Hungwe C, Lowe-Zinola JD, Tsang JCH, Bevan K, Cardus C, Duggal A, Hossain S, McHugh M, Scott M, Chan F, Evans R, Gurung E, Haughey B, Jacob-Ramsdale B, Kerr M, Lee J, McCann E, O'Boyle K, Reid N, Hayat F, Hodgson S, Johnston R, Jones W, Khan M, Linn T, Long S, Seetharam P, Shaman S, Smart B, Anilkumar A, Davies J, Griffith J, Hughes B, Islam Y, Kidanu D, Mushaini N, Qamar I, Robinson H, Schramm M, Tan CY, Apperley H, Billyard C, Blazeby JM, Cannon SP, Carse S, Göpfert A, Loizidou A, Parkin J, Sanders E, Sharma S, Slade G, Telfer R, Huppatz IW, Worley E, Chandramoorthy L, Friend C, Harris L, Jain P, Karim MJ, Killington K, McGillicuddy J, Rafferty C, Rahunathan N, Rayne T, Varathan Y, Verma N, Zanichelli D, Arneill M, Brown F, Campbell B, Crozier L, Henry J, McCusker C, Prabakaran P, Wilson R, Asif U, Connor M, Dindyal S, Math N, Pagarkar A, Saleem H, Seth I, Sharma S, Standfield N, Swartbol T, Adamson R, Choi JE, El Tokhy O, Ho W, Javaid NR, Kelly M, Mehdi AS, Menon D, Plumptre I, Sturrock S, Turner J, Warren O, Crane E, Ferris B, Gadsby C, Smallwood J, Vipond M, Wilson V, Amarnath T, Doshi A, Gregory C, Kandiah K, Powell B, Spoor H, Toh C, Vizor R, Common M, Dunleavy K, Harris S, Luo C, Mesbah Z, Kumar AP, Redmond A, Skulsky S, Walsh T, Daly D, Deery L, Epanomeritakis E, Harty M, Kane D, Khan K, Mackey R, McConville J, McGinnity K, Nixon G, Ang A, Kee JY, Leung E, Norman S, Palaniappan SV, Sarathy PP, Yeoh T, Frost J, Hazeldine P, Jones L, Karbowiak M, Macdonald C, Mutarambirwa A, Omotade A, Runkel M, Ryan G, Sawers N, Searle C, Suresh S, Vig S, Ahmad A, McGartland R, Sim R, Song A, Wayman J, Brown R, Chang LH, Concannon K, Crilly C, Arnold TJ, Burgin A, Cadden F, Choy CH, Coleman M, Lim D, Luk J, Mahankali-Rao P, Prudence-Taylor AJ, Ramakrishnan D, Russell J, Fawole A, Gohil J, Green B, Hussain A, McMenamin L, McMenamin L, Tang M, Azmi F, Benchetrit S, Cope T, Haque A, Harlinska A, Holdsworth R, Ivo T, Martin J, Nisar T, Patel A, Sasapu K, Trevett J, Vernet G, Aamir A, Bird C, Durham-Hall A, Gibson W, Hartley J, May N, Maynard V, Johnson S, Wood CM, O'Brien M, Orbell J, Stringfellow TD, Tenters F, Tresidder S, Cheung W, Grant A, Tod N, Bews-Hair M, Lim ZH, Lim SW, Vella-Baldacchino M, Auckburally S, Chopada A, Easdon S, Goodson R, McCurdie F, Narouz M, Radford A, Rea E, Taylor O, Yu T, Alfa-Wali M, Amani L, Auluck I, Bruce P, Emberton J, Kumar R, Lagzouli N, Mehta A, Murtaza A, Raja M, Dennahy IS, Frew K, Given A, He YY, Karim MA, MacDonald E, McDonald E, McVinnie D, Ng SK, Pettit A, Sim DPY, Berthaume-Hawkins SD, Charnley R, Fenton K, Jones D, Murphy C, Ng JQ, Reehal R, Robinson H, Seraj SS, Shang E, Tonks A, White P, Yeo A, Chong P, Gabriel R, Patel N, Richardson E, Symons L, Aubrey-Jones D, Dawood S, Dobrzynska M, Faulkner S, Griffiths H, Mahmood F, Patel P, Perry M, Power A, Simpson R, Ali A, Brobbey P, Burrows A, Elder P, Ganyani R, Horseman C, Hurst P, Mann H, Marimuthu K, McBride S, Pilsworth E, Powers N, Stanier P, Innes R, Kersey T, Kopczynska M, Langasco N, Patel N, Rajagopal R, Atkins B, Beasley W, Lim ZC, Gill A, Ang HL, Williams H, Yogeswara T, Carter R, Fam M, Fong J, Latter J, Long M, Mackinnon S, McKenzie C, Osmanska J, Raghuvir V, Shafi A, Tsang K, Walker L, Bountra K, Coldicutt O, Fletcher D, Hudson S, Iqbal S, Bernal TL, Martin JWB, Moss-Lawton F, Smallwood J, Vipond M, Cardwell A, Edgerton K, Laws J, Rai A, Robinson K, Waite K, Ward J, Youssef H, Knight C, Koo PY, Lazarou A, Stanger S, Thorn C, Triniman MC, Botha A, Boyles L, Cumming S, Deepak S, Ezzat A, Fowler AJ, Gwozdz AM, Hussain SF, Khan S, Li H, Morrell BL, Neville J, Nitiahpapand R, Pickering O, Sagoo H, Sharma E, Welsh K, Denley S, Khan S, Agarwal M, Al-Saadi N, Bhambra R, Gupta A, Jawad ZAR, Jiao LR, Khan K, Mahir G, Singagireson S, Thoms BL, Tseu B, Wei R, Yang N, Britton N, Leinhardt D, Mahfooz M, Palkhi A, Price M, Sheikh S, Barker M, Bowley D, Cant M, Datta U, Farooqi M, Lee A, Morley G, Amin MN, Parry A, Patel S, Strang S, Yoganayagam N, Adlan A, Chandramoorthy S, Choudhary Y, Das K, Feldman M, France B, Grace R, Puddy H, Soor P, Ali M, Dhillon P, Faraj A, Gerard L, Glover M, Imran H, Kim S, Patrick Y, Peto J, Prabhudesai A, Smith R, Tang A, Vadgama N, Dhaliwal R, Ecclestone T, Harris A, Ong D, Patel D, Philp C, Stewart E, Wang L, Wong E, Xu Y, Ashaye T, Fozard T, Galloway F, Kaptanis S, Mistry P, Nguyen T, Olagbaiye F, Osman M, Philip Z, Rembacken R, Tayeh S, Theodoropoulou K, Herman A, Lau J, Saha A, Trotter M, Adeleye O, Cave D, Gunwa T, Magalhães J, Makwana S, Mason R, Parish M, Regan H, Renwick P, Roberts G, Salekin D, Sivakumar C, Tariq A, Liew I, McDade A, Stewart D, Hague M, Hudson-Peacock N, Jackson CES, James F, Pitt J, Walker EY, Aftab R, Ang JJ, Anwar S, Battle J, Budd E, Chui J, Crook H, Davies P, Easby S, Hackney E, Ho B, Imam SZ, Rammell J, Andrews H, Perry C, Schinle P, Ahmed P, Aquilina T, Balai E, Church M, Cumber E, Curtis A, Davies G, Dennis Y, Dumann E, Greenhalgh S, Kim P, King S, Metcalfe KHM, Passby L, Redgrave N, Soonawalla Z, Waters S, Zornoza A, Gulzar I, Hole J, Hull K, Ishaq H, Karaj J, Kelkar A, Love E, Patel S, Thakrar D, Vine M, Waterman A, Dib NP, Francis N, Hanson M, Ingleton R, Sadanand KS, Sukirthan N, Arnell S, Ball M, Bassam N, Beghal G, Chang A, Dawe V, George A, Huq T, Hussain A, Ikram B, Kanapeckaite L, Khan M, Ramjas D, Rushd A, Sait S, Serry M, Yardimci E, Capella S, Chenciner L, Episkopos C, Karam E, McCarthy C, Moore-Kelly W, Watson N, Ahluwalia V, Barnfield J, Ben-Gal O, Bloom I, Gharatya A, Khodatars K, Merchant N, Moonan A, Moore M, Patel K, Spiers H, Sundaram K, Turner J, Bath MF, Black J, Chadwick H, Huisman L, Ingram H, Khan S, Martin L, Metcalfe M, Sangal P, Seehra J, Thatcher A, Venturini S, Whitcroft I, Afzal Z, Brown S, Gani A, Gomaa A, Hussein N, Oh SY, Pazhaniappan N, Sharkey E, Sivagnanasithiyar T, Williams C, Yeung J, Cruddas L, Gurjar S, Pau A, Prakash R, Randhawa R, Chen L, Eiben I, Naylor M, Osei-Bordom D, Trenear R, Bannard-Smith J, Griffiths N, Patel BY, Saeed F, Abdikadir H, Bennett M, Church R, Clements SE, Court J, Delvi A, Hubert J, Macdonald B, Mansour F, Patel RR, Perris R, Small S, Betts A, Brown N, Chong A, Croitoru C, Grey A, Hickland P, Ho C, Hollington D, McKie L, Nelson AR, Stewart H, Eiben P, Nedham M, Ali I, Brown T, Cumming S, Hunt C, Joyner C, McAlinden C, Roberts J, Rogers D, Thachettu A, Tyson N, Vaughan R, Verma N, Yasin T, Andrew K, Bhamra N, Leong S, Mistry R, Noble H, Rashed F, Walker NR, Watson L, Worsfold M, Yarham E, Abdikadir H, Arshad A, Barmayehvar B, Cato L, Chan-lam N, Do V, Leong A, Sheikh Z, Zheleniakova T, Coppel J, Hussain ST, Mahmood R, Nourzaie R, Prowle J, Sheik-Ali S, Thomas A, Alagappan A, Ashour R, Bains H, Diamond J, Gordon J, Ibrahim B, Khalil M, Mittapalli D, Neo YN, Patil P, Peck FS, Reza N, Swan I, Whyte M, Chaudhry S, Hernon J, Khawar H, O'Brien J, Pullinger M, Rothnie K, Ujjal S, Bhatte S, Curtis J, Green S, Mayer A, Watkinson G, Chapple K, Hawthorne T, Khaliq M, Majkowski L, Malik TAM, Mclauchlan K, En BNW, Parton S, Robinson SD, Saat MI, Shurovi BN, Varatharasasingam K, Ward AE, Behranwala K, Bertelli M, Cohen J, Duff F, Fafemi O, Gupta R, Manimaran M, Mayhew J, Peprah D, Wong MHY, Farmer N, Houghton C, Kandhari N, Khan K, Ladha D, Mayes J, McLennan F, Panahi P, Seehra H, Agrawal R, Ahmed I, Ali S, Birkinshaw F, Choudhry M, Gokani S, Harrogate S, Jamal S, Nawrozzadeh F, Swaray A, Szczap A, Warusavitarne J, Abdalla M, Asemota N, Cullum R, Hartley M, Maxwell-Armstrong C, Mulvenna C, Phillips J, Yule A, Ahmed L, Clement KD, Craig N, Elseedawy E, Gorman D, Kane L, Livie J, Livie V, Moss E, Naasan A, Ravi F, Shields P, Zhu Y, Archer M, Cobley H, Dennis R, Downes C, Guevel B, Lamptey E, Murray H, Radhakrishnan A, Saravanabavan S, Sardar M, Shaw C, Tilliridou V, Wright R, Ye W, Alturki N, Helliwell R, Jones E, Kelly D, Lambotharan S, Scott K, Sivakumar R, Victor L, Boraluwe-Rallage H, Froggatt P, Haynes S, Hung YMA, Keyte A, Matthews L, Evans E, Haray P, John I, Mathivanan A, Morgan L, Oji O, Okorocha C, Rutherford A, Spiers H, Stageman N, Tsui A, Whitham R, Amoah-Arko A, Cecil E, Dietrich A, Fitzpatrick H, Guy C, Hair J, Hilton J, Jawad L, McAleer E, Taylor Z, Yap J, Akhbari M, Debnath D, Dhir T, Elbuzidi M, Elsaddig M, Glace S, Khawaja H, Koshy R, Lal K, Lobo L, McDermott A, Meredith J, Qamar MA, Vaidya A, Acquaah F, Barfi L, Carter N, Gnanappiragasam D, Ji C, Kaminski F, Lawday S, Mackay K, Sulaiman SK, Webb R, Ananthavarathan P, Dalal F, Farrar E, Hashemi R, Hossain M, Jiang J, Kiandee M, Lex J, Mason L, Matthews JH, McGeorge E, Modhwadia S, Pinkney T, Radotra A, Rickard L, Rodman L, Sales A, Tan KL, Bachi A, Bajwa DS, Battle J, Brown LR, Butler A, Calciu A, Davies E, Gardner I, Girdlestone T, Ikogho O, Keelan G, O'Loughlin P, Tam J, Elias J, Ngaage M, Thompson J, Bristow S, Brock E, Davis H, Pantelidou M, Sathiyakeerthy A, Singh K, Chaudhry A, Dickson G, Glen P, Gregoriou K, Hamid H, Mclean A, Mehtaji P, Neophytou G, Potts S, Belgaid DR, Burke J, Durno J, Ghailan N, Hanson M, Henshaw V, Nazir UR, Omar I, Riley BJ, Roberts J, Smart G, Van Winsen K, Bhatti A, Chan M, D'Auria M, Green S, Keshvala C, Li H, Maxwell-Armstrong C, Michaelidou M, Simmonds L, Smith C, Wimalathasan A, Abbas J, Cairns C, Chin YR, Connelly A, Moug S, Nair A, Svolkinas D, Coe P, Subar D, Wang H, Zaver V, Brayley J, Cookson P, Cunningham L, Gaukroger A, Ho M, Hough A, King J, O'Hagan D, Widdison A, Brown R, Brown B, Chavan A, Francis S, Hare L, Lund J, Malone N, Mavi B, McIlwaine A, Rangarajan S, Abuhussein N, Campbell HS, Daniels J, Fitzgerald I, Mansfield S, Pendrill A, Robertson D, Smart YW, Teng T, Yates J, Belgaumkar A, Katira A, Kossoff J, Kukran S, Laing C, Mathew B, Mohamed T, Myers S, Novell R, Phillips BL, Thomas M, Turlejski T, Turner S, Varcada M, Warren L, Wynell-Mayow W, Church R, Linley-Adams L, Osborn G, Saunders M, Spencer R, Srikanthan M, Tailor S, Tullett A, Ali M, Al-Masri S, Carr G, Ebhogiaye O, Heng S, Manivannan S, Manley J, McMillan LE, Peat C, Phillips B, Thomas S, Whewell H, Williams G, Bienias A, Cope EA, Courquin GR, Day L, Garner C, Gimson A, Harris C, Markham K, Moore T, Nadin T, Phillips C, Subratty SM, Brown K, Dada J, Durbacz M, Filipescu T, Harrison E, Kennedy ED, Khoo E, Kremel D, Lyell I, Pronin S, Tummon R, Ventre C, Walls L, Wootton E, Akhtar A, Davies E, El-Sawy D, Farooq M, Gaddah M, Griffiths H, Katsaiti I, Khadem N, Leong K, Williams I, Chean CS, Chudek D, Desai H, Ellerby N, Hammad A, Malla S, Murphy B, Oshin O, Popova P, Rana S, Ward T, Abbott TEF, Akpenyi O, Edozie F, El Matary R, English W, Jeyabaladevan S, Morgan C, Naidu V, Nicholls K, Peroos S, Prowle J, Sansome S, Torrance HD, Townsend D, Brecher J, Fung H, Kazmi Z, Outlaw P, Pursnani K, Ramanujam N, Razaq A, Sattar M, Sukumar S, Tan TSE, Chohan K, Dhuna S, Haq T, Kirby S, Lacy-Colson J, Logan P, Malik Q, McCann J, Mughal Z, Sadiq S, Sharif I, Shingles C, Simon A, Burnage S, Chan SSN, Craig ARJ, Duffield J, Dutta A, Eastwood M, Iqbal F, Mahmood F, Mahmood W, Patel C, Qadeer A, Robinson A, Rotundo A, Schade A, Slade RD, De Freitas M, Kinnersley H, McDowell E, Moens-Lecumberri S, Ramsden J, Rockall T, Wiffen L, Wright S, Bruce C, Francois V, Hamdan K, Limb C, Lunt AJ, Manley L, Marks M, Phillips CFE, Agnew CJF, Barr CJ, Benons N, Hart SJ, Kandage D, Krysztopik R, Mahalingam P, Mock J, Rajendran S, Stoddart MT, Clements B, Gillespie H, Lee S, McDougall R, Murray C, O'Loane R, Periketi S, Tan S, Amoah R, Bhudia R, Dudley B, Gilbert A, Griffiths B, Khan H, McKigney N, Roberts B, Samuel R, Seelarbokus A, Stubbing-Moore A, Thompson G, Williams P, Ahmed N, Akhtar R, Chandler E, Chappelow I, Gil H, Gower T, Kale A, Lingam G, Rutler L, Sellahewa C, Sheikh A, Stringer H, Taylor R, Aglan H, Ashraf MR, Choo S, Das E, Epstein J, Gentry R, Mills D, Poolovadoo Y, Ward N, Bull K, Cole A, Hack J, Khawari S, Lake C, Mandishona T, Perry R, Sleight S, Sultan S, Thornton T, Williams S, Arif T, Castle A, Chauhan P, Chesner R, Eilon T, Kamarajah S, Kambasha C, Lock L, Loka T, Mohammad F, Motahariasl S, Roper L, Sadhra SS, Sheikh A, Toma T, Wadood Q, Yip J, Ainger E, Busti S, Cunliffe L, Flamini T, Gaffing S, Moorcroft C, Peter M, Simpson L, Stokes E, Stott G, Wilson J, York J, Yousaf A, Borakati A, Brown M, Goaman A, Hodgson B, Ijeomah A, Iroegbu U, Kaur G, Lowe C, Mahmood S, Sattar Z, Sen P, Szuman A, Abbas N, Al-Ausi M, Anto N, Bhome R, Eccles L, Elliott J, Hughes EJ, Jones A, Karunatilleke AS, Knight JS, Manson CCF, Mekhail I, Michaels L, Noton TM, Okenyi E, Reeves T, Yasin IH, Banfield DA, Harris R, Lim D, Mason-Apps C, Roe T, Sandhu J, Shafiq N, Stickler E, Tam JP, Williams LM, Ainsworth P, Boualbanat Y, Doull C, Egan E, Evans L, Hassanin K, Ninkovic-Hall G, Odunlami W, Shergill M, Traish M, Cummings D, Kershaw S, Ong J, Reid F, Toellner H, Alwandi A, Amer M, George D, Haynes K, Hughes K, Peakall L, Premakumar Y, Punjabi N, Ramwell A, Sawkins H, Ashwood J, Baker A, Baron C, Bhide I, Blake E, De Cates C, Esmail R, Hosamuddin H, Kapp J, Nguru N, Raja M, Thomson F, Ahmed H, Aishwarya G, Al-Huneidi R, Ali S, Aziz R, Burke D, Clarke B, Kausar A, Maskill D, Mecia L, Myers L, Smith ACD, Walker G, Wroe N, Donohoe C, Gibbons D, Jordan P, Keogh C, Kiely A, Lalor P, McCrohan M, Powell C, Foley MP, Reynolds J, Silke E, Thorpe O, Kong JTH, White C, Ali Q, Dalrymple J, Ge Y, Khan H, Luo RS, Paine H, Paraskeva B, Parker L, Pillai K, Salciccioli J, Selvadurai S, Sonagara V, Springford LR, Tan L, Appleton S, Leadholm N, Zhang Y, Ahern D, Cotter M, Cremen S, Durrigan T, Flack V, Hrvacic N, Jones H, Jong B, Keane K, O'Connell PR, O'sullivan J, Pek G, Shirazi S, Barker C, Brown A, Carr W, Chen Y, Guillotte C, Harte J, Kokayi A, Lau K, McFarlane S, Morrison S, Broad J, Kenefick N, Makanji D, Printz V, Saito R, Thomas O, Breen H, Kirk S, Kong CH, O'Kane A, Eddama M, Engledow A, Freeman SK, Frost A, Goh C, Lee G, Poonawala R, Suri A, Taribagil P, Brown H, Christie S, Dean S, Gravell R, Haywood E, Holt F, Pilsworth E, Rabiu R, Roscoe HW, Shergill S, Sriram A, Sureshkumar A, Tan LC, Tanna A, Vakharia A, Bhullar S, Brannick S, Dunne E, Frere M, Kerin M, Kumar KM, Pratumsuwan T, Quek R, Salman M, Van Den Berg N, Wong C, Ahluwalia J, Bagga R, Borg CM, Calabria C, Draper A, Farwana M, Joyce H, Khan A, Mazza M, Pankin G, Sait MS, Sandhu N, Virani N, Wong J, Woodhams K, Croghan N, Ghag S, Hogg G, Ismail O, John N, Nadeem K, Naqi M, Noe SM, Sharma A, Tan S, Begum F, Best R, Collishaw A, Glasbey J, Golding D, Gwilym B, Harrison P, Jackman T, Lewis N, Luk YL, Porter T, Potluri S, Stechman M, Tate S, Thomas D, Walford B, Auld F, Bleakley A, Johnston S, Jones C, Khaw J, Milne S, O'Neill S, Singh KKR, Smith R, Swan A, Thorley N, Yalamarthi S, Yin ZD, Ali A, Balian V, Bana R, Clark K, Livesey C, McLachlan G, Mohammad M, Pranesh N, Richards C, Ross F, Sajid M, Brooke M, Francombe J, Gresly J, Hutchinson S, Kerrigan K, Matthews E, Nur S, Parsons L, Sandhu A, Vyas M, White F, Zulkifli A, Zuzarte L, Al-Mousawi A, Arya J, Azam S, Yahaya AA, Gill K, Hallan R, Hathaway C, Leptidis I, McDonagh L, Mitrasinovic S, Mushtaq N, Pang N, Peiris GB, Rinkoff S, Chan L, Christopher E, Farhan-Alanie MMH, Gonzalez-Ciscar A, Graham CJ, Lim H, McLean KA, Paterson HM, Rogers A, Roy C, Rutherford D, Smith F, Zubikarai G, Al-Khudairi R, Bamford M, Chang M, Cheng J, Hedley C, Joseph R, Mitchell B, Perera S, Rothwell L, Siddiqui A, Smith J, Taylor K, Wright OW, Baryan HK, Boyd G, Conchie H, Cox L, Davies J, Gardner S, Hill N, Krishna K, Lakin F, Scotcher S, Alberts J, Asad M, Barraclough J, Campbell A, Marshall D, Wakeford W, Cronbach P, D'Souza F, Gammeri E, Houlton J, Hall M, Kethees A, Patel R, Perera M, Prowle J, Shaid M, Webb E, Beattie S, Chadwick M, El-Taji O, Haddad S, Mann M, Patel M, Popat K, Rimmer L, Riyat H, Smith H, Anandarajah C, Cipparrone M, Desai K, Gao C, Goh ET, Howlader M, Jeffreys N, Karmarkar A, Mathew G, Mukhtar H, Ozcan E, Renukanthan A, Sarens N, Sinha C, Woolley A, Bogle R, Komolafe O, Loo F, Waugh D, Zeng R, Crewe A, Mathias J, Mills A, Owen A, Prior A, Saunders I, Baker A, Crilly L, McKeon J, Ubhi HK, Adeogun A, Carr R, Davison C, Devalia S, Hayat A, Karsan RB, Osborne C, Scott K, Weegenaar C, Wijeyaratne M, Babatunde F, Barnor-Ahiaku E, Beattie G, Chitsabesan P, Dixon O, Hall N, Ilenkovan N, Mackrell T, Nithianandasivam N, Orr J, Palazzo F, Saad M, Sandland-Taylor L, Sherlock J, Ashdown T, Chandler S, Garsaa T, Lloyd J, Loh SY, Ng S, Perkins C, Powell-Chandler A, Smith F, Underhill R. Perioperative intravenous contrast administration and the incidence of acute kidney injury after major gastrointestinal surgery: prospective, multicentre cohort study. Br J Surg 2020; 107:1023-1032. [PMID: 32026470 DOI: 10.1002/bjs.11453] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 09/21/2019] [Accepted: 11/08/2019] [Indexed: 01/14/2023]
Abstract
BACKGROUND This study aimed to determine the impact of preoperative exposure to intravenous contrast for CT and the risk of developing postoperative acute kidney injury (AKI) in patients undergoing major gastrointestinal surgery. METHODS This prospective, multicentre cohort study included adults undergoing gastrointestinal resection, stoma reversal or liver resection. Both elective and emergency procedures were included. Preoperative exposure to intravenous contrast was defined as exposure to contrast administered for the purposes of CT up to 7 days before surgery. The primary endpoint was the rate of AKI within 7 days. Propensity score-matched models were adjusted for patient, disease and operative variables. In a sensitivity analysis, a propensity score-matched model explored the association between preoperative exposure to contrast and AKI in the first 48 h after surgery. RESULTS A total of 5378 patients were included across 173 centres. Overall, 1249 patients (23·2 per cent) received intravenous contrast. The overall rate of AKI within 7 days of surgery was 13·4 per cent (718 of 5378). In the propensity score-matched model, preoperative exposure to contrast was not associated with AKI within 7 days (odds ratio (OR) 0·95, 95 per cent c.i. 0·73 to 1·21; P = 0·669). The sensitivity analysis showed no association between preoperative contrast administration and AKI within 48 h after operation (OR 1·09, 0·84 to 1·41; P = 0·498). CONCLUSION There was no association between preoperative intravenous contrast administered for CT up to 7 days before surgery and postoperative AKI. Risk of contrast-induced nephropathy should not be used as a reason to avoid contrast-enhanced CT.
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Abd El-Monem A, Ismail O, Ahmed A. The economic and productive efficiency on cows fattening projects in Assiut governorate, Egypt. Archives of Agriculture Sciences Journal 2020; 0:92-104. [DOI: 10.21608/aasj.2020.104417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Ismail O, Wang MX, Iliff JJ. P3-189: CHARACTERISING THE ASTROCYTIC PROFILE OF DYSTROBREVIN IN THE BRAIN DURING ALZHEIMER'S DISEASE. Alzheimers Dement 2019. [DOI: 10.1016/j.jalz.2019.06.3218] [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: 11/30/2022]
Affiliation(s)
- Ozama Ismail
- University College London; London United Kingdom
- Oregon Health & Science University; Portland OR USA
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Ismail O, Harrison IF, Wells JA, Nahavandi P, Ohene Y, Evans P, Ahmed Z, Sung K, Murray TK, O'Neill MJ, Wiseman FK, Fisher E, Lythgoe MF. IC-P-019: DYNAMIC CONTRAST-ENHANCED MRI TO ASSESS GLYMPHATIC FUNCTION IN THE NL-F MOUSE MODEL OF ALZHEIMER'S DISEASE. Alzheimers Dement 2019. [DOI: 10.1016/j.jalz.2019.06.4181] [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: 10/25/2022]
Affiliation(s)
- Ozama Ismail
- University College London; London United Kingdom
| | | | | | | | | | - Phoebe Evans
- University College London; London United Kingdom
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Ismail O, Harrison IF, Wells JA, Nahavandi P, Ohene Y, Evans P, Ahmed Z, Sung K, Murray TK, O'Neill MJ, Wiseman FK, Fisher E, Lythgoe MF. P2-070: DYNAMIC CONTRAST-ENHANCED MRI TO ASSESS GLYMPHATIC FUNCTION IN THE NL-F MOUSE MODEL OF ALZHEIMER'S DISEASE. Alzheimers Dement 2019. [DOI: 10.1016/j.jalz.2019.06.2477] [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: 11/29/2022]
Affiliation(s)
- Ozama Ismail
- University College London; London United Kingdom
| | | | | | | | | | - Phoebe Evans
- University College London; London United Kingdom
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Ma D, Holmes HE, Cardoso MJ, Modat M, Harrison IF, Powell NM, O'Callaghan JM, Ismail O, Johnson RA, O'Neill MJ, Collins EC, Beg MF, Popuri K, Lythgoe MF, Ourselin S. Study the Longitudinal in vivo and Cross-Sectional ex vivo Brain Volume Difference for Disease Progression and Treatment Effect on Mouse Model of Tauopathy Using Automated MRI Structural Parcellation. Front Neurosci 2019; 13:11. [PMID: 30733665 PMCID: PMC6354066 DOI: 10.3389/fnins.2019.00011] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [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: 08/02/2018] [Accepted: 01/08/2019] [Indexed: 11/29/2022] Open
Abstract
Brain volume measurements extracted from structural MRI data sets are a widely accepted neuroimaging biomarker to study mouse models of neurodegeneration. Whether to acquire and analyze data in vivo or ex vivo is a crucial decision during the phase of experimental designs, as well as data analysis. In this work, we extracted the brain structures for both longitudinal in vivo and single-time-point ex vivo MRI acquired from the same animals using accurate automatic multi-atlas structural parcellation, and compared the corresponding statistical and classification analysis. We found that most gray matter structures volumes decrease from in vivo to ex vivo, while most white matter structures volume increase. The level of structural volume change also varies between different genetic strains and treatment. In addition, we showed superior statistical and classification power of ex vivo data compared to the in vivo data, even after resampled to the same level of resolution. We further demonstrated that the classification power of the in vivo data can be improved by incorporating longitudinal information, which is not possible for ex vivo data. In conclusion, this paper demonstrates the tissue-specific changes, as well as the difference in statistical and classification power, between the volumetric analysis based on the in vivo and ex vivo structural MRI data. Our results emphasize the importance of longitudinal analysis for in vivo data analysis.
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Affiliation(s)
- Da Ma
- Translational Imaging Group, Centre for Medical Image Computing, University College London, London, United Kingdom.,Centre for Advanced Biomedical Imaging, University College London, London, United Kingdom.,School of Engineering Science, Simon Fraser University, Burnaby, BC, Canada
| | - Holly E Holmes
- Centre for Advanced Biomedical Imaging, University College London, London, United Kingdom
| | - Manuel J Cardoso
- Translational Imaging Group, Centre for Medical Image Computing, University College London, London, United Kingdom.,School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
| | - Marc Modat
- Translational Imaging Group, Centre for Medical Image Computing, University College London, London, United Kingdom.,School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
| | - Ian F Harrison
- Centre for Advanced Biomedical Imaging, University College London, London, United Kingdom
| | - Nick M Powell
- Translational Imaging Group, Centre for Medical Image Computing, University College London, London, United Kingdom.,Centre for Advanced Biomedical Imaging, University College London, London, United Kingdom
| | - James M O'Callaghan
- Centre for Advanced Biomedical Imaging, University College London, London, United Kingdom
| | - Ozama Ismail
- Centre for Advanced Biomedical Imaging, University College London, London, United Kingdom
| | - Ross A Johnson
- Tailored Therapeutics, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, IN, United States
| | | | - Emily C Collins
- Tailored Therapeutics, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, IN, United States
| | - Mirza F Beg
- Tailored Therapeutics, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, IN, United States
| | - Karteek Popuri
- Tailored Therapeutics, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, IN, United States
| | - Mark F Lythgoe
- Centre for Advanced Biomedical Imaging, University College London, London, United Kingdom
| | - Sebastien Ourselin
- Translational Imaging Group, Centre for Medical Image Computing, University College London, London, United Kingdom.,School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom
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Ohene Y, Harrison IF, Nahavandi P, Ismail O, Bird EV, Ottersen OP, Nagelhus EA, Thomas DL, Lythgoe MF, Wells JA. Non-invasive MRI of brain clearance pathways using multiple echo time arterial spin labelling: an aquaporin-4 study. Neuroimage 2018; 188:515-523. [PMID: 30557661 PMCID: PMC6414399 DOI: 10.1016/j.neuroimage.2018.12.026] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 11/30/2018] [Accepted: 12/12/2018] [Indexed: 12/26/2022] Open
Abstract
There is currently a lack of non-invasive tools to assess water transport in healthy and pathological brain tissue. Aquaporin-4 (AQP4) water channels are central to many water transport mechanisms, and emerging evidence also suggests that AQP4 plays a key role in amyloid-β (Aβ) clearance, possibly via the glymphatic system. Here, we present the first non-invasive technique sensitive to AQP4 channels polarised at the blood-brain interface (BBI). We apply a multiple echo time (multi-TE) arterial spin labelling (ASL) MRI technique to the mouse brain to assess BBI water permeability via calculation of the exchange time (Texw), the time for magnetically labelled intravascular water to exchange across the BBI. We observed a 31% increase in exchange time in AQP4-deficient (Aqp4-/-) mice (452 ± 90 ms) compared to their wild-type counterparts (343 ± 91 ms) (p = 0.01), demonstrating the sensitivity of the technique to the lack of AQP4 water channels. More established, quantitative MRI parameters: arterial transit time (δa), cerebral blood flow (CBF) and apparent diffusion coefficient (ADC) detected no significant changes with the removal of AQP4. This clinically relevant tool may be crucial to better understand the role of AQP4 in water transport across the BBI, as well as clearance of proteins in neurodegenerative conditions such as Alzheimer's disease.
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Affiliation(s)
- Yolanda Ohene
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, UCL, London, UK
| | - Ian F Harrison
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, UCL, London, UK
| | - Payam Nahavandi
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, UCL, London, UK
| | - Ozama Ismail
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, UCL, London, UK
| | - Eleanor V Bird
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, UCL, London, UK
| | - Ole P Ottersen
- GliaLab and Letten Centre, Division of Physiology, Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway
| | - Erlend A Nagelhus
- GliaLab and Letten Centre, Division of Physiology, Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway
| | - David L Thomas
- Neuroradiological Academic Unit, UCL Institute of Neurology, UCL, London, UK; Leonard Wolfson Experimental Neurology Centre, UCL Institute of Neurology, UCL, London, UK
| | - Mark F Lythgoe
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, UCL, London, UK
| | - Jack A Wells
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, UCL, London, UK.
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Harrison IF, Siow B, Akilo AB, Evans PG, Ismail O, Ohene Y, Nahavandi P, Thomas DL, Lythgoe MF, Wells JA. Non-invasive imaging of CSF-mediated brain clearance pathways via assessment of perivascular fluid movement with diffusion tensor MRI. eLife 2018; 7:34028. [PMID: 30063207 PMCID: PMC6117153 DOI: 10.7554/elife.34028] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [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: 12/05/2017] [Accepted: 07/30/2018] [Indexed: 12/13/2022] Open
Abstract
The glymphatics system describes a CSF-mediated clearance pathway for the removal of potentially harmful molecules, such as amyloid beta, from the brain. As such, its components may represent new therapeutic targets to alleviate aberrant protein accumulation that defines the most prevalent neurodegenerative conditions. Currently, however, the absence of any non-invasive measurement technique prohibits detailed understanding of glymphatic function in the human brain and in turn, it’s role in pathology. Here, we present the first non-invasive technique for the assessment of glymphatic inflow by using an ultra-long echo time, low b-value, multi-direction diffusion weighted MRI sequence to assess perivascular fluid movement (which represents a critical component of the glymphatic pathway) in the rat brain. This novel, quantitative and non-invasive approach may represent a valuable biomarker of CSF-mediated brain clearance, working towards the clinical need for reliable and early diagnostic indicators of neurodegenerative conditions such as Alzheimer’s disease. Our brain is bathed in cerebrospinal fluid, a clear liquid that ‘cushions’ the fragile organ. This liquid travels into the brain along special channels – the perivascular space – that surround certain blood vessels. As the fluid washes in and out of the brain, it takes with it potentially harmful molecules, such as the aggregates that build up to cause Alzheimer’s disease. If this brain-cleaning system becomes faulty, it could lead to neurodegenerative diseases. However, it is extremely difficult to measure the activity of this intricate and delicate system, and most studies so far have had to use invasive techniques that usually require brain surgery. Now, Harrison et al. adapt a technique, called diffusion tensor magnetic resonance imaging (MRI), to visualise how the cerebrospinal fluid moves in the perivascular space in healthy rats. The non-invasive MRI method captures how the cerebrospinal fluid is driven into the brain when the blood vessels nearby expand and contract; as the vessels pulsate with each heartbeat, there is a 300% increase in the movement of the fluid in the perivascular space. This approach could be applied to understand exactly how neurodegenerative diseases emerge when the cerebrospinal fluid stops to properly clean the brain. Ultimately, the method could be used to detect when the cleansing system starts to fail in people, which could help to treat patients before their brains accumulate too many harmful substances.
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Affiliation(s)
- Ian F Harrison
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, University College London, London, United Kingdom
| | - Bernard Siow
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, University College London, London, United Kingdom.,The Francis Crick Institute, London, United Kingdom
| | - Aisha B Akilo
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, University College London, London, United Kingdom
| | - Phoebe G Evans
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, University College London, London, United Kingdom
| | - Ozama Ismail
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, University College London, London, United Kingdom
| | - Yolanda Ohene
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, University College London, London, United Kingdom
| | - Payam Nahavandi
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, University College London, London, United Kingdom
| | - David L Thomas
- Neuroradiological Academic Unit, Department of Brain Repair and Rehabilitation, UCL Institute of Neurology, London, United Kingdom.,Leonard Wolfson Experimental Neurology Centre, UCL Institute of Neurology, London, United Kingdom
| | - Mark F Lythgoe
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, University College London, London, United Kingdom
| | - Jack A Wells
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, University College London, London, United Kingdom
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19
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Goh C, Kong P, Krishinan S, Ma S, Ismail O. Comparing Warfarin with Novel Oral Anticoagulants in Stroke Events for Patients with Atrial Fibrillation Undergoing Electrical Cardioversion. Int J Cardiol 2017. [DOI: 10.1016/j.ijcard.2017.09.084] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Kong P, Kanasan S, Yazid M, Khamdan H, Ismail O. Duke Treadmill Score Predicts Coronary Artery Disease Status Among Asian Women Patients. Int J Cardiol 2017. [DOI: 10.1016/j.ijcard.2017.09.123] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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21
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Colgan N, Ganeshan B, Harrison IF, Ismail O, Holmes HE, Wells JA, Powell NM, O'Callaghan JM, O'Neill MJ, Murray TK, Ahmed Z, Collins EC, Johnson RA, Groves A, Lythgoe MF. In Vivo Imaging of Tau Pathology Using Magnetic Resonance Imaging Textural Analysis. Front Neurosci 2017; 11:599. [PMID: 29163005 PMCID: PMC5681716 DOI: 10.3389/fnins.2017.00599] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Accepted: 10/11/2017] [Indexed: 11/25/2022] Open
Abstract
Background: Non-invasive characterization of the pathological features of Alzheimer's disease (AD) could enhance patient management and the development of therapeutic strategies. Magnetic resonance imaging texture analysis (MRTA) has been used previously to extract texture descriptors from structural clinical scans in AD to determine cerebral tissue heterogeneity. In this study, we examined the potential of MRTA to specifically identify tau pathology in an AD mouse model and compared the MRTA metrics to histological measures of tau burden. Methods: MRTA was applied to T2 weighted high-resolution MR images of nine 8.5-month-old rTg4510 tau pathology (TG) mice and 16 litter matched wild-type (WT) mice. MRTA comprised of the filtration-histogram technique, where the filtration step extracted and enhanced features of different sizes (fine, medium, and coarse texture scales), followed by quantification of texture using histogram analysis (mean gray level intensity, mean intensity, entropy, uniformity, skewness, standard-deviation, and kurtosis). MRTA was applied to manually segmented regions of interest (ROI) drawn within the cortex, hippocampus, and thalamus regions and the level of tau burden was assessed in equivalent regions using histology. Results: Texture parameters were markedly different between WT and TG in the cortex (E, p < 0.01, K, p < 0.01), the hippocampus (K, p < 0.05) and in the thalamus (K, p < 0.01). In addition, we observed significant correlations between histological measurements of tau burden and kurtosis in the cortex, hippocampus and thalamus. Conclusions: MRTA successfully differentiated WT and TG in brain regions with varying degrees of tau pathology (cortex, hippocampus, and thalamus) based on T2 weighted MR images. Furthermore, the kurtosis measurement correlated with histological measures of tau burden. This initial study indicates that MRTA may have a role in the early diagnosis of AD and the assessment of tau pathology using routinely acquired structural MR images.
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Affiliation(s)
- Niall Colgan
- Division of Medicine, UCL Centre for Advanced Biomedical Imaging, University College London, London, United Kingdom
- School of Physics, National University of Ireland Galway, Galway, Ireland
| | - Balaji Ganeshan
- Institute of Nuclear Medicine, University College London Hospitals, London, United Kingdom
| | - Ian F. Harrison
- Division of Medicine, UCL Centre for Advanced Biomedical Imaging, University College London, London, United Kingdom
| | - Ozama Ismail
- Division of Medicine, UCL Centre for Advanced Biomedical Imaging, University College London, London, United Kingdom
| | - Holly E. Holmes
- Division of Medicine, UCL Centre for Advanced Biomedical Imaging, University College London, London, United Kingdom
| | - Jack A. Wells
- Division of Medicine, UCL Centre for Advanced Biomedical Imaging, University College London, London, United Kingdom
| | - Nick M. Powell
- Division of Medicine, UCL Centre for Advanced Biomedical Imaging, University College London, London, United Kingdom
| | - James M. O'Callaghan
- Division of Medicine, UCL Centre for Advanced Biomedical Imaging, University College London, London, United Kingdom
| | | | | | - Zeshan Ahmed
- Eli Lilly & Co. Ltd., Windlesham, United Kingdom
| | - Emily C. Collins
- Eli Lilly & Co. Ltd., Lilly Corporate Center, Indianapolis, IN, United States
| | - Ross A. Johnson
- Eli Lilly & Co. Ltd., Lilly Corporate Center, Indianapolis, IN, United States
| | - Ashley Groves
- Institute of Nuclear Medicine, University College London Hospitals, London, United Kingdom
| | - Mark F. Lythgoe
- Division of Medicine, UCL Centre for Advanced Biomedical Imaging, University College London, London, United Kingdom
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22
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O'Callaghan J, Holmes H, Powell N, Wells JA, Ismail O, Harrison IF, Siow B, Johnson R, Ahmed Z, Fisher A, Meftah S, O'Neill MJ, Murray TK, Collins EC, Shmueli K, Lythgoe MF. Tissue magnetic susceptibility mapping as a marker of tau pathology in Alzheimer's disease. Neuroimage 2017; 159:334-345. [PMID: 28797738 PMCID: PMC5678288 DOI: 10.1016/j.neuroimage.2017.08.003] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Revised: 07/27/2017] [Accepted: 08/01/2017] [Indexed: 01/15/2023] Open
Abstract
Alzheimer's disease is connected to a number of other neurodegenerative conditions, known collectively as 'tauopathies', by the presence of aggregated tau protein in the brain. Neuroinflammation and oxidative stress in AD are associated with tau pathology and both the breakdown of axonal sheaths in white matter tracts and excess iron accumulation grey matter brain regions. Despite the identification of myelin and iron concentration as major sources of contrast in quantitative susceptibility maps of the brain, the sensitivity of this technique to tau pathology has yet to be explored. In this study, we perform Quantitative Susceptibility Mapping (QSM) and T2* mapping in the rTg4510, a mouse model of tauopathy, both in vivo and ex vivo. Significant correlations were observed between histological measures of myelin content and both mean regional magnetic susceptibility and T2* values. These results suggest that magnetic susceptibility is sensitive to tissue myelin concentrations across different regions of the brain. Differences in magnetic susceptibility were detected in the corpus callosum, striatum, hippocampus and thalamus of the rTg4510 mice relative to wild type controls. The concentration of neurofibrillary tangles was found to be low to intermediate in these brain regions indicating that QSM may be a useful biomarker for early stage detection of tau pathology in neurodegenerative diseases.
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Affiliation(s)
- J O'Callaghan
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, UCL, UK.
| | - H Holmes
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, UCL, UK
| | - N Powell
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, UCL, UK
| | - J A Wells
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, UCL, UK
| | - O Ismail
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, UCL, UK
| | - I F Harrison
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, UCL, UK
| | - B Siow
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, UCL, UK
| | - R Johnson
- Eli Lilly and Company, 355 E Merrill Street, Dock 48, Indianapolis, IN, 46225, USA
| | - Z Ahmed
- Eli Lilly & Co. Ltd, Erl Wood Manor, Windlesham, Surrey, GU20 6PH, UK
| | - A Fisher
- Eli Lilly & Co. Ltd, Erl Wood Manor, Windlesham, Surrey, GU20 6PH, UK
| | - S Meftah
- Eli Lilly & Co. Ltd, Erl Wood Manor, Windlesham, Surrey, GU20 6PH, UK
| | - M J O'Neill
- Eli Lilly & Co. Ltd, Erl Wood Manor, Windlesham, Surrey, GU20 6PH, UK
| | - T K Murray
- Eli Lilly & Co. Ltd, Erl Wood Manor, Windlesham, Surrey, GU20 6PH, UK
| | - E C Collins
- Eli Lilly and Company, 355 E Merrill Street, Dock 48, Indianapolis, IN, 46225, USA
| | - K Shmueli
- Department of Medical Physics and Biomedical Engineering, UCL, UK
| | - M F Lythgoe
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, UCL, UK
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23
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Nahavandi P, Niranjan A, Ohene Y, Harrison IF, Ismail O, Murray TK, Johnson RA, O'Neill MJ, Collins EC, Lythgoe MF, Wells JA. [IC‐P‐193]: FMRI OF VISUAL STIMULI IN A TAU MODEL OF ALZHEIMER's DISEASE. Alzheimers Dement 2017. [DOI: 10.1016/j.jalz.2017.06.2568] [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]
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24
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Ismail O, Harrison IF, Wells JA, Ohene Y, Nahavandi P, Gourine AV, Ahmed Z, Fisher A, Murray TK, Johnson RA, Collins EC, O'Neill MJ, Lythgoe MF. [IC‐P‐024]: INVESTIGATING GLYMPHATIC FUNCTION DURING EARLY TAU PATHOLOGY USING DYNAMIC CONTRAST‐ENHANCED MRI. Alzheimers Dement 2017. [DOI: 10.1016/j.jalz.2017.06.2296] [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: 11/17/2022]
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25
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Holmes HE, Powell NM, Ma D, Ismail O, Harrison IF, Wells JA, Colgan N, O'Callaghan JM, Johnson RA, Murray TK, Ahmed Z, Heggenes M, Fisher A, Cardoso MJ, Modat M, O'Neill MJ, Collins EC, Fisher EMC, Ourselin S, Lythgoe MF. Comparison of In Vivo and Ex Vivo MRI for the Detection of Structural Abnormalities in a Mouse Model of Tauopathy. Front Neuroinform 2017; 11:20. [PMID: 28408879 PMCID: PMC5374887 DOI: 10.3389/fninf.2017.00020] [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: 12/01/2016] [Accepted: 02/27/2017] [Indexed: 11/15/2022] Open
Abstract
With increasingly large numbers of mouse models of human disease dedicated to MRI studies, compromises between in vivo and ex vivo MRI must be fully understood in order to inform the choice of imaging methodology. We investigate the application of high resolution in vivo and ex vivo MRI, in combination with tensor-based morphometry (TBM), to uncover morphological differences in the rTg4510 mouse model of tauopathy. The rTg4510 mouse also offers a novel paradigm by which the overexpression of mutant tau can be regulated by the administration of doxycycline, providing us with a platform on which to investigate more subtle alterations in morphology with morphometry. Both in vivo and ex vivo MRI allowed the detection of widespread bilateral patterns of atrophy in the rTg4510 mouse brain relative to wild-type controls. Regions of volume loss aligned with neuronal loss and pathological tau accumulation demonstrated by immunohistochemistry. When we sought to investigate more subtle structural alterations in the rTg4510 mice relative to a subset of doxycycline-treated rTg4510 mice, ex vivo imaging enabled the detection of more regions of morphological brain changes. The disadvantages of ex vivo MRI may however mitigate this increase in sensitivity: we observed a 10% global shrinkage in brain volume of the post-mortem tissues due to formalin fixation, which was most notable in the cerebellum and olfactory bulbs. However, many central brain regions were not adversely affected by the fixation protocol, perhaps due to our “in-skull” preparation. The disparity between our TBM findings from in vivo and ex vivo MRI underlines the importance of appropriate study design, given the trade-off between these two imaging approaches. We support the utility of in vivo MRI for morphological phenotyping of mouse models of disease; however, for subtler phenotypes, ex vivo offers enhanced sensitivity to discrete morphological changes.
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Affiliation(s)
- Holly E Holmes
- Division of Medicine, UCL Centre for Advanced Biomedical Imaging, University College LondonLondon, UK
| | - Nick M Powell
- Division of Medicine, UCL Centre for Advanced Biomedical Imaging, University College LondonLondon, UK.,Centre for Medical Image Computing, University College LondonLondon, UK
| | - Da Ma
- Division of Medicine, UCL Centre for Advanced Biomedical Imaging, University College LondonLondon, UK.,Centre for Medical Image Computing, University College LondonLondon, UK
| | - Ozama Ismail
- Division of Medicine, UCL Centre for Advanced Biomedical Imaging, University College LondonLondon, UK
| | - Ian F Harrison
- Division of Medicine, UCL Centre for Advanced Biomedical Imaging, University College LondonLondon, UK
| | - Jack A Wells
- Division of Medicine, UCL Centre for Advanced Biomedical Imaging, University College LondonLondon, UK
| | - Niall Colgan
- Division of Medicine, UCL Centre for Advanced Biomedical Imaging, University College LondonLondon, UK
| | - James M O'Callaghan
- Division of Medicine, UCL Centre for Advanced Biomedical Imaging, University College LondonLondon, UK
| | - Ross A Johnson
- Tailored Therapeutics, Eli Lilly and Company, Lilly Corporate CenterIndianapolis, IN, USA
| | | | - Zeshan Ahmed
- Molecular Pathology, Eli Lilly & Co. LtdWindlesham, UK
| | | | - Alice Fisher
- Molecular Pathology, Eli Lilly & Co. LtdWindlesham, UK
| | - M Jorge Cardoso
- Centre for Medical Image Computing, University College LondonLondon, UK
| | - Marc Modat
- Centre for Medical Image Computing, University College LondonLondon, UK
| | | | - Emily C Collins
- Tailored Therapeutics, Eli Lilly and Company, Lilly Corporate CenterIndianapolis, IN, USA
| | - Elizabeth M C Fisher
- Department of Neurodegenerative Disease, Institute of Neurology, University College LondonLondon, UK
| | | | - Mark F Lythgoe
- Division of Medicine, UCL Centre for Advanced Biomedical Imaging, University College LondonLondon, UK
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26
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Ismail O, Anchah L, Kun Yun L, Dahlui M, Yen L, Tiong Kiam O. PS226 Cost Analysis of Elective PCI and Clinical Outcomes: A Comparison of Six Tertiary Referral Centre in Malaysia. Glob Heart 2016. [DOI: 10.1016/j.gheart.2016.03.178] [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: 11/16/2022] Open
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27
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Mohamed Amin Mostafa A, Sheau Chin L, Ali SK Abdul Kader M, Ismail O, Mohamed Noor D, Kah Hay Y, Ibrahim B. PS171 The Effect of Haematological Variables on the Verifynow P2Y12 Assay in Coronary Artery Disease Patients (CAD) Undergoing Interventional Angiographic Procedure. Glob Heart 2016. [DOI: 10.1016/j.gheart.2016.03.145] [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: 11/28/2022] Open
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28
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Holmes HE, Colgan N, Ismail O, Ma D, Powell NM, O'Callaghan JM, Harrison IF, Johnson RA, Murray TK, Ahmed Z, Heggenes M, Fisher A, Cardoso MJ, Modat M, Walker-Samuel S, Fisher EMC, Ourselin S, O'Neill MJ, Wells JA, Collins EC, Lythgoe MF. Imaging the accumulation and suppression of tau pathology using multiparametric MRI. Neurobiol Aging 2016; 39:184-94. [PMID: 26923415 PMCID: PMC4782737 DOI: 10.1016/j.neurobiolaging.2015.12.001] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Revised: 12/08/2015] [Accepted: 12/09/2015] [Indexed: 01/30/2023]
Abstract
Mouse models of Alzheimer's disease have served as valuable tools for investigating pathogenic mechanisms relating to neurodegeneration, including tau-mediated and neurofibrillary tangle pathology-a major hallmark of the disease. In this work, we have used multiparametric magnetic resonance imaging (MRI) in a longitudinal study of neurodegeneration in the rTg4510 mouse model of tauopathy, a subset of which were treated with doxycycline at different time points to suppress the tau transgene. Using this paradigm, we investigated the sensitivity of multiparametric MRI to both the accumulation and suppression of pathologic tau. Tau-related atrophy was discernible from 5.5 months within the cortex and hippocampus. We observed markedly less atrophy in the treated rTg4510 mice, which was enhanced after doxycycline intervention from 3.5 months. We also observed differences in amide proton transfer, cerebral blood flow, and diffusion tensor imaging parameters in the rTg4510 mice, which were significantly less altered after doxycycline treatment. We propose that these non-invasive MRI techniques offer insight into pathologic mechanisms underpinning Alzheimer's disease that may be important when evaluating emerging therapeutics targeting one of more of these processes.
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Affiliation(s)
- Holly E Holmes
- Division of Medicine, Centre for Advanced Biomedical Imaging, University College London, London, UK.
| | - Niall Colgan
- Division of Medicine, Centre for Advanced Biomedical Imaging, University College London, London, UK
| | - Ozama Ismail
- Division of Medicine, Centre for Advanced Biomedical Imaging, University College London, London, UK
| | - Da Ma
- Division of Medicine, Centre for Advanced Biomedical Imaging, University College London, London, UK; Translational Imaging Group, Centre for Medical Image Computing, University College London, London, UK
| | - Nick M Powell
- Division of Medicine, Centre for Advanced Biomedical Imaging, University College London, London, UK; Translational Imaging Group, Centre for Medical Image Computing, University College London, London, UK
| | - James M O'Callaghan
- Division of Medicine, Centre for Advanced Biomedical Imaging, University College London, London, UK
| | - Ian F Harrison
- Division of Medicine, Centre for Advanced Biomedical Imaging, University College London, London, UK
| | - Ross A Johnson
- Tailored Therapeutics, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, IN, USA
| | | | | | | | | | - M J Cardoso
- Translational Imaging Group, Centre for Medical Image Computing, University College London, London, UK
| | - Marc Modat
- Translational Imaging Group, Centre for Medical Image Computing, University College London, London, UK
| | - Simon Walker-Samuel
- Division of Medicine, Centre for Advanced Biomedical Imaging, University College London, London, UK
| | - Elizabeth M C Fisher
- Department of Neurodegenerative Diseases, Institute of Neurology, University College London, London, UK
| | - Sebastien Ourselin
- Translational Imaging Group, Centre for Medical Image Computing, University College London, London, UK
| | | | - Jack A Wells
- Division of Medicine, Centre for Advanced Biomedical Imaging, University College London, London, UK
| | - Emily C Collins
- Tailored Therapeutics, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, IN, USA
| | - Mark F Lythgoe
- Division of Medicine, Centre for Advanced Biomedical Imaging, University College London, London, UK
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29
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Colgan N, Siow B, O'Callaghan JM, Harrison IF, Wells JA, Holmes HE, Ismail O, Richardson S, Alexander DC, Collins EC, Fisher EM, Johnson R, Schwarz AJ, Ahmed Z, O'Neill MJ, Murray TK, Zhang H, Lythgoe MF. Application of neurite orientation dispersion and density imaging (NODDI) to a tau pathology model of Alzheimer's disease. Neuroimage 2015; 125:739-744. [PMID: 26505297 PMCID: PMC4692518 DOI: 10.1016/j.neuroimage.2015.10.043] [Citation(s) in RCA: 130] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Revised: 09/30/2015] [Accepted: 10/17/2015] [Indexed: 11/21/2022] Open
Abstract
Increased hyperphosphorylated tau and the formation of intracellular neurofibrillary tangles are associated with the loss of neurons and cognitive decline in Alzheimer's disease, and related neurodegenerative conditions. We applied two diffusion models, diffusion tensor imaging (DTI) and neurite orientation dispersion and density imaging (NODDI), to in vivo diffusion magnetic resonance images (dMRI) of a mouse model of human tauopathy (rTg4510) at 8.5 months of age. In grey matter regions with the highest degree of tau burden, microstructural indices provided by both NODDI and DTI discriminated the rTg4510 (TG) animals from wild type (WT) controls; however only the neurite density index (NDI) (the volume fraction that comprises axons or dendrites) from the NODDI model correlated with the histological measurements of the levels of hyperphosphorylated tau protein. Reductions in diffusion directionality were observed when implementing both models in the white matter region of the corpus callosum, with lower fractional anisotropy (DTI) and higher orientation dispersion (NODDI) observed in the TG animals. In comparison to DTI, histological measures of tau pathology were more closely correlated with NODDI parameters in this region. This in vivo dMRI study demonstrates that NODDI identifies potential tissue sources contributing to DTI indices and NODDI may provide greater specificity to pathology in Alzheimer's disease. We analyzed the microstructural changes in rTg4510 and wild type mice at 8.5 months. We correlated microstructural findings with histological measures of tau burden We compare two diffusion MR models: DTI and NODDI. Both models revealed changes in tissue microstructure due to tau pathology. The NODDI metrics demonstrated a good correlation with histological measures of tau burden.
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Affiliation(s)
- N Colgan
- UCL Centre for Advanced Biomedical Imaging , Division of Medicine, University College London, UK; Department of Medical Physics and Bioengineering, Saolta University Health Care Group, University Hospital Galway, Newcastle Road, Galway, H91 YR71, Ireland.
| | - B Siow
- UCL Centre for Advanced Biomedical Imaging , Division of Medicine, University College London, UK; Department of Computer Science & Centre for Medical Image Computing, University College London, UK
| | - J M O'Callaghan
- UCL Centre for Advanced Biomedical Imaging , Division of Medicine, University College London, UK
| | - I F Harrison
- UCL Centre for Advanced Biomedical Imaging , Division of Medicine, University College London, UK
| | - J A Wells
- UCL Centre for Advanced Biomedical Imaging , Division of Medicine, University College London, UK
| | - H E Holmes
- UCL Centre for Advanced Biomedical Imaging , Division of Medicine, University College London, UK
| | - O Ismail
- UCL Centre for Advanced Biomedical Imaging , Division of Medicine, University College London, UK
| | - S Richardson
- UCL Centre for Advanced Biomedical Imaging , Division of Medicine, University College London, UK; Department of Computer Science & Centre for Medical Image Computing, University College London, UK
| | - D C Alexander
- Department of Computer Science & Centre for Medical Image Computing, University College London, UK
| | - E C Collins
- Eli Lilly & Co. Ltd, Lilly Corporate Center, Indianapolis, IN 46285, USA
| | - E M Fisher
- Department of Neurodegenerative Disease, UCL Institute of Neurology, Queen Square London, UK
| | - R Johnson
- Eli Lilly & Co. Ltd, Lilly Corporate Center, Indianapolis, IN 46285, USA
| | - A J Schwarz
- Eli Lilly & Co. Ltd, Lilly Corporate Center, Indianapolis, IN 46285, USA
| | - Z Ahmed
- Eli Lilly & Co. Ltd, Erl Wood Manor, Windlesham, Surrey GU20 6PH, UK
| | - M J O'Neill
- Eli Lilly & Co. Ltd, Erl Wood Manor, Windlesham, Surrey GU20 6PH, UK
| | - T K Murray
- Eli Lilly & Co. Ltd, Erl Wood Manor, Windlesham, Surrey GU20 6PH, UK
| | - H Zhang
- Department of Computer Science & Centre for Medical Image Computing, University College London, UK
| | - M F Lythgoe
- UCL Centre for Advanced Biomedical Imaging , Division of Medicine, University College London, UK
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30
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Ismail O, Harrison IF, Holmes H, Colgan N, Wells JA, O'Callaghan JM, Powell NM, Ma D, Ourselin S, Walker-Samuel S, Murray TK, Fisher A, Ahmed Z, O'Neill MJ, Johnson RA, Collins EC, Lythgoe MF. P1‐029: Imaging the efficacy of microtubule stabilizing agent epothilone d in the rtg4510 mouse model of tauopathy. Alzheimers Dement 2015. [DOI: 10.1016/j.jalz.2015.06.225] [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: 10/22/2022]
Affiliation(s)
| | | | | | | | | | | | | | - Da Ma
- University College LondonLondonUnited Kingdom
| | - Sebastien Ourselin
- Centre for Medical Image ComputingUniversity College LondonLondonUnited Kingdom
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31
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Ismail O, Holmes H, Colgan N, Ma D, Wells JA, Powell NM, O'Callaghan JM, Harrison IF, Walker-Samuel S, Cardoso JM, Modat M, Fisher E, Ourselin S, Murray TK, Ahmed Z, O'Neill MJ, Johnson RA, Collins EC, Lythgoe MF. IC‐P‐158: A multiscale MRI approach to investigate novel drug treatment strategies in mouse models of Alzheimer's disease. Alzheimers Dement 2015. [DOI: 10.1016/j.jalz.2015.06.181] [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)
| | | | | | - Da Ma
- University College LondonLondonUnited Kingdom
| | | | | | | | | | | | | | - Marc Modat
- University College LondonLondonUnited Kingdom
| | | | - Sebastien Ourselin
- Centre for Medical Image ComputingUniversity College LondonLondonUnited Kingdom
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32
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Ismail O, Holmes H, Colgan N, Ma D, Wells JA, Powell NM, O'Callaghan JM, Harrison IF, Walker-Samuel S, Cardoso JM, Modat M, Fisher E, Ourselin S, Murray TK, Ahmed Z, O'Neill MJ, Johnson RA, Collins EC, Lythgoe MF. O3‐04‐02: A multi‐scale MRI approach to investigate novel drug treatment strategies in mouse models of Alzheimer's disease. Alzheimers Dement 2015. [DOI: 10.1016/j.jalz.2015.07.255] [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: 11/25/2022]
Affiliation(s)
| | | | | | - Da Ma
- University College LondonLondonUnited Kingdom
| | | | | | | | | | | | | | - Marc Modat
- University College LondonLondonUnited Kingdom
| | | | - Sebastien Ourselin
- Centre for Medical Image ComputingUniversity College LondonLondonUnited Kingdom
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33
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Ismail O, Harrison IF, Holmes H, Colgan N, Wells JA, O'Callaghan JM, Walker-Samuel S, Powell NM, Ma D, Ourselin S, Murray TK, Fisher A, Ahmed Z, O'Neill MJ, Johnson RA, Collins EC, Lythgoe MF. IC‐P‐159: Imaging the efficacy of microtubule stabilizing agent epothilone d in the rtg4510 mouse model of tauopathy. Alzheimers Dement 2015. [DOI: 10.1016/j.jalz.2015.06.182] [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)
| | | | | | | | | | | | | | | | - Da Ma
- University College LondonLondonUnited Kingdom
| | - Sebastien Ourselin
- Centre for Medical Image ComputingUniversity College LondonLondonUnited Kingdom
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34
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Harrison IF, Machhada A, Colgan N, Ismail O, O'Callaghan JM, Holmes H, Wells JA, Gourine AV, Murray TK, Ahmed Z, Johnson RA, Collins EC, O'Neill MJ, Lythgoe MF. P2‐150: Glymphatic clearance impaired in a mouse model of tauopathy: Captured using contrast‐enhanced MRI. Alzheimers Dement 2015. [DOI: 10.1016/j.jalz.2015.06.688] [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: 12/01/2022]
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35
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Wells JA, O'Callaghan JM, Holmes HE, Powell NM, Johnson RA, Siow B, Torrealdea F, Ismail O, Walker-Samuel S, Golay X, Rega M, Richardson S, Modat M, Cardoso MJ, Ourselin S, Schwarz AJ, Ahmed Z, Murray TK, O'Neill MJ, Collins EC, Colgan N, Lythgoe MF. In vivo imaging of tau pathology using multi-parametric quantitative MRI. Neuroimage 2015; 111:369-78. [PMID: 25700953 PMCID: PMC4626540 DOI: 10.1016/j.neuroimage.2015.02.023] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2014] [Revised: 02/04/2015] [Accepted: 02/10/2015] [Indexed: 12/29/2022] Open
Abstract
As the number of people diagnosed with Alzheimer's disease (AD) reaches epidemic proportions, there is an urgent need to develop effective treatment strategies to tackle the social and economic costs of this fatal condition. Dozens of candidate therapeutics are currently being tested in clinical trials, and compounds targeting the aberrant accumulation of tau proteins into neurofibrillary tangles (NFTs) are the focus of substantial current interest. Reliable, translatable biomarkers sensitive to both tau pathology and its modulation by treatment along with animal models that faithfully reflect aspects of the human disease are urgently required. Magnetic resonance imaging (MRI) is well established as a valuable tool for monitoring the structural brain changes that accompany AD progression. However the descent into dementia is not defined by macroscopic brain matter loss alone: non-invasive imaging measurements sensitive to protein accumulation, white matter integrity and cerebral haemodynamics probe distinct aspects of AD pathophysiology and may serve as superior biomarkers for assessing drug efficacy. Here we employ a multi-parametric array of five translatable MRI techniques to characterise the in vivo pathophysiological phenotype of the rTg4510 mouse model of tauopathy (structural imaging, diffusion tensor imaging (DTI), arterial spin labelling (ASL), chemical exchange saturation transfer (CEST) and glucose CEST). Tau-induced pathological changes included grey matter atrophy, increased radial diffusivity in the white matter, decreased amide proton transfer and hyperperfusion. We demonstrate that the above markers unambiguously discriminate between the transgenic group and age-matched controls and provide a comprehensive profile of the multifaceted neuropathological processes underlying the rTg4510 model. Furthermore, we show that ASL and DTI techniques offer heightened sensitivity to processes believed to precede detectable structural changes and, as such, provides a platform for the study of disease mechanisms and therapeutic intervention.
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Affiliation(s)
- J A Wells
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine and Institute of Child Health, University College London, UK.
| | - J M O'Callaghan
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine and Institute of Child Health, University College London, UK
| | - H E Holmes
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine and Institute of Child Health, University College London, UK
| | - N M Powell
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine and Institute of Child Health, University College London, UK; Translational Imaging Group, Centre for Medical Imaging Computing, University College London, UK
| | - R A Johnson
- Eli Lilly & Co. Ltd, Erl Wood Manor, Windlesham, Surrey GU20 6PH, UK
| | - B Siow
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine and Institute of Child Health, University College London, UK
| | - F Torrealdea
- Brain Repair & Rehabilitation, Institute of Neurology, University College London, UK
| | - O Ismail
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine and Institute of Child Health, University College London, UK
| | - S Walker-Samuel
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine and Institute of Child Health, University College London, UK
| | - X Golay
- Brain Repair & Rehabilitation, Institute of Neurology, University College London, UK
| | - M Rega
- Brain Repair & Rehabilitation, Institute of Neurology, University College London, UK
| | - S Richardson
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine and Institute of Child Health, University College London, UK
| | - M Modat
- Translational Imaging Group, Centre for Medical Imaging Computing, University College London, UK
| | - M J Cardoso
- Translational Imaging Group, Centre for Medical Imaging Computing, University College London, UK
| | - S Ourselin
- Translational Imaging Group, Centre for Medical Imaging Computing, University College London, UK
| | - A J Schwarz
- Eli Lilly and Company, Lilly Corporate Center, Indianapolis, IN 46285, USA
| | - Z Ahmed
- Eli Lilly & Co. Ltd, Erl Wood Manor, Windlesham, Surrey GU20 6PH, UK
| | - T K Murray
- Eli Lilly & Co. Ltd, Erl Wood Manor, Windlesham, Surrey GU20 6PH, UK
| | - M J O'Neill
- Eli Lilly & Co. Ltd, Erl Wood Manor, Windlesham, Surrey GU20 6PH, UK
| | - E C Collins
- Eli Lilly and Company, Lilly Corporate Center, Indianapolis, IN 46285, USA
| | - N Colgan
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine and Institute of Child Health, University College London, UK
| | - M F Lythgoe
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine and Institute of Child Health, University College London, UK
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Wells JA, Holmes HE, O'Callaghan JM, Colgan N, Ismail O, Fisher EM, Siow B, Murray TK, Schwarz AJ, O'Neill MJ, Collins EC, Lythgoe MF. Increased cerebral vascular reactivity in the tau expressing rTg4510 mouse: evidence against the role of tau pathology to impair vascular health in Alzheimer's disease. J Cereb Blood Flow Metab 2015; 35:359-62. [PMID: 25515210 PMCID: PMC4348392 DOI: 10.1038/jcbfm.2014.224] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [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: 06/20/2014] [Revised: 11/12/2014] [Accepted: 11/16/2014] [Indexed: 02/03/2023]
Abstract
Vascular abnormalities are a key feature of Alzheimer's disease (AD). Imaging of cerebral vascular reactivity (CVR) is a powerful tool to investigate vascular health in clinical populations although the cause of reduced CVR in AD patients is not fully understood. We investigated the specific role of tau pathology in CVR derangement in AD using the rTg4510 mouse model. We observed an increase in CVR in cortical regions with tau pathology. These data suggest that tau pathology alone does not produce the clinically observed decreases in CVR and implicates amyloid pathology as the dominant etiology of impaired CVR in AD patients.
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Affiliation(s)
- Jack A Wells
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, University College London, London, UK
| | - Holly E Holmes
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, University College London, London, UK
| | - James M O'Callaghan
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, University College London, London, UK
| | - Niall Colgan
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, University College London, London, UK
| | - Ozama Ismail
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, University College London, London, UK
| | - Elizabeth Mc Fisher
- Department of Neurodegenerative Disease, Institute of Neurology, UCL, London, UK
| | - Bernard Siow
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, University College London, London, UK
| | | | - Adam J Schwarz
- Tailored Therapeutics, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana, USA
| | | | - Emily C Collins
- Tailored Therapeutics, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana, USA
| | - Mark F Lythgoe
- UCL Centre for Advanced Biomedical Imaging, Division of Medicine, University College London, London, UK
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37
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Ayadi-Kaddour A, Khadhar A, Mlika M, Ismail O, Braham E, Marghli A, Zidi A, El Mezni F. [Tracheal tumor treated as asthma]. Rev Pneumol Clin 2014; 70:353-356. [PMID: 25131369 DOI: 10.1016/j.pneumo.2014.04.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Revised: 03/28/2014] [Accepted: 04/03/2014] [Indexed: 06/03/2023]
Abstract
Primary tumors of the trachea are very rare. In adults, the majority of them are malignant. Schwannomas are exceedingly rare benign tumors in the tracheobronchial tree. We report a case of a 37-year-old man who was hospitalized for increasing dyspnea. He had been treated for bronchial asthma for the last 4 years with no benefit. The CT scan of the chest and bronchoscopy identified a tracheal mass that was prolapsed in the left stem bronchus. The patient did not remain free of disease after endoscopic laser resection. So, surgical resection was made. The tumor was excised at its base. A segment of the left stem bronchus was removed and primary anastomosis was performed. The histopathologic diagnosis was of a benign schwannoma without malignant elements. There was no recurrence during the follow-up period. This case demonstrates that intratracheal masses should be considered in patients with dyspnea or in patients with asthma refractory to conventional therapy.
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Affiliation(s)
- A Ayadi-Kaddour
- Service d'anatomie pathologique, hôpital Abderrahmen Mami de pneumo-phtysiologie, Ariana, Tunisie.
| | - A Khadhar
- Service d'anatomie pathologique, hôpital Abderrahmen Mami de pneumo-phtysiologie, Ariana, Tunisie
| | - M Mlika
- Service d'anatomie pathologique, hôpital Abderrahmen Mami de pneumo-phtysiologie, Ariana, Tunisie
| | - O Ismail
- Service d'anatomie pathologique, hôpital Abderrahmen Mami de pneumo-phtysiologie, Ariana, Tunisie
| | - E Braham
- Service d'anatomie pathologique, hôpital Abderrahmen Mami de pneumo-phtysiologie, Ariana, Tunisie
| | - A Marghli
- Service de chirurgie thoracique, hôpital Abderrahmen Mami, Ariana, Tunisie
| | - A Zidi
- Service de radiologie, hôpital Abderrahmen Mami, Ariana, Tunisie
| | - F El Mezni
- Service d'anatomie pathologique, hôpital Abderrahmen Mami de pneumo-phtysiologie, Ariana, Tunisie
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38
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Ayadi-Kaddour A, Ammar J, Ismail O, Braham E, Hamzaoui A, Kilani T, Zidi A, El Mezni F. [Pulmonary zygomycosis in a diabetic child complicated with thrombus of the left atrial auricle]. Arch Pediatr 2014; 21:1241-5. [PMID: 25282464 DOI: 10.1016/j.arcped.2014.08.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2013] [Revised: 03/27/2014] [Accepted: 08/05/2014] [Indexed: 10/24/2022]
Abstract
Mucormycosis is a rare but fatal, opportunistic fungal infection caused by fungi of the order of mucorales in the class of Zygomycetes. Isolated pulmonary mucormycosis is rare and occurs principally in particular conditions, especially in patients with uncontrolled diabetes. The fungi invades the blood vessels and causes distal ischemic necrosis. We report a case in a 13-year-old girl with diabetes mellitus who developed pulmonary zygomycosis complicated with thrombus of the left atrial auricle. The diagnosis of mucormycosis was confirmed by histologic examination of endobronchial biopsies. Combined treatment with systemic amphotericin B and surgery resulted in a favorable outcome. This difficult diagnosis must be raised in diabetic patients with unresponsive lung infections in order to apply early aggressive therapy. Successful management continues to be early diagnosis, followed by systemic antifungal therapy and surgical resection combined with control of the underlying disease.
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Affiliation(s)
- A Ayadi-Kaddour
- Service d'anatomie pathologique, hôpital A. Mami, Ariana, Tunisie.
| | - J Ammar
- Service de pneumologie, pavillon B, hôpital A. Mami, Ariana, Tunisie
| | - O Ismail
- Service d'anatomie pathologique, hôpital A. Mami, Ariana, Tunisie
| | - E Braham
- Service d'anatomie pathologique, hôpital A. Mami, Ariana, Tunisie
| | - A Hamzaoui
- Service de pneumologie, pavillon B, hôpital A. Mami, Ariana, Tunisie
| | - T Kilani
- Service de chirurgie thoracique, hôpital A. Mami, Ariana, Tunisie
| | - A Zidi
- Service d'imagerie médicale, hôpital A. Mami, Ariana, Tunisie
| | - F El Mezni
- Service d'anatomie pathologique, hôpital A. Mami, Ariana, Tunisie
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Colgan N, Ganeshan B, Ismail O, Holmes H, Powell N, Wells J, O'Callaghan J, Collins E, Johnson R, O'Neill M, Murray T, Groves A, Ahmed Z, Lythgoe M. O4‐02‐04: BRAIN TEXTURE ANALYSIS AS A BIOMARKER FOR TAUOPATHY IN A TRANSGENIC MOUSE MODEL OF ALZHEIMER'S. Alzheimers Dement 2014. [DOI: 10.1016/j.jalz.2014.04.393] [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)
| | | | | | | | | | - Jack Wells
- University College LondonLondonUnited Kingdom
| | | | - Emily Collins
- Eli Lilly and CompanyIndianapolisIndianaUnited States
| | | | | | | | - Ashley Groves
- University College London HospitalLondonUnited Kingdom
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40
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Ayadi-Kaddour A, Khadhar A, Mlika M, Braham E, Ismail O, Zegal D, El Mezni F. Fibroadenoma in an ectopic vulvar breast gland: a common neoplasm in an uncommon site. Pathologica 2014; 106:32-34. [PMID: 24897780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023] Open
Abstract
Ectopic breast tissue is defined as glands located outside of the breast. It can be found anywhere along the milk line extending from the axilla to the groin, and can occur in the vulva. Ectopic breast tissue should be excised because it may develop benign or malignant pathologic processes. Less than 40 cases of fibroadenoma in the vulva have been reported in the literature. We report a case of a 37-year-old woman presenting a solitary vulvar mass. The mass was excised completely, and histology demonstrated an ectopic breast fibroadenoma. This is one of the few reports on the benign pathologies of vulvar mammary glands.
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41
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Ismail O. EPA-0658 – Sex-typical play in children with congenital adrenal hyperplasia. Eur Psychiatry 2014. [DOI: 10.1016/s0924-9338(14)78026-5] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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42
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Ismail O. EPA-0673 - Cognitive function and cerebral structure in children with type 1 diabetes. Eur Psychiatry 2014. [DOI: 10.1016/s0924-9338(14)78041-1] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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43
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Chen J, Ingham N, Clare S, Raisen C, Vancollie VE, Ismail O, McIntyre RE, Tsang SH, Mahajan VB, Dougan G, Adams DJ, White JK, Steel KP. Mcph1-deficient mice reveal a role for MCPH1 in otitis media. PLoS One 2013; 8:e58156. [PMID: 23516444 PMCID: PMC3596415 DOI: 10.1371/journal.pone.0058156] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Accepted: 01/31/2013] [Indexed: 12/20/2022] Open
Abstract
Otitis media is a common reason for hearing loss, especially in children. Otitis media is a multifactorial disease and environmental factors, anatomic dysmorphology and genetic predisposition can all contribute to its pathogenesis. However, the reasons for the variable susceptibility to otitis media are elusive. MCPH1 mutations cause primary microcephaly in humans. So far, no hearing impairment has been reported either in the MCPH1 patients or mouse models with Mcph1 deficiency. In this study, Mcph1-deficient (Mcph1tm1a/tm1a) mice were produced using embryonic stem cells with a targeted mutation by the Sanger Institute's Mouse Genetics Project. Auditory brainstem response measurements revealed that Mcph1tm1a/tm1a mice had mild to moderate hearing impairment with around 70% penetrance. We found otitis media with effusion in the hearing-impaired Mcph1tm1a/tm1a mice by anatomic and histological examinations. Expression of Mcph1 in the epithelial cells of middle ear cavities supported its involvement in the development of otitis media. Other defects of Mcph1tm1a/tm1a mice included small skull sizes, increased micronuclei in red blood cells, increased B cells and ocular abnormalities. These findings not only recapitulated the defects found in other Mcph1-deficient mice or MCPH1 patients, but also revealed an unexpected phenotype, otitis media with hearing impairment, which suggests Mcph1 is a new gene underlying genetic predisposition to otitis media.
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Affiliation(s)
- Jing Chen
- Wellcome Trust Sanger Institute, Hinxton, Cambridgeshire, United Kingdom
| | - Neil Ingham
- Wellcome Trust Sanger Institute, Hinxton, Cambridgeshire, United Kingdom
| | - Simon Clare
- Wellcome Trust Sanger Institute, Hinxton, Cambridgeshire, United Kingdom
| | - Claire Raisen
- Wellcome Trust Sanger Institute, Hinxton, Cambridgeshire, United Kingdom
| | | | - Ozama Ismail
- Wellcome Trust Sanger Institute, Hinxton, Cambridgeshire, United Kingdom
| | | | - Stephen H. Tsang
- Edward S. Harkness Eye Institute, Columbia University, New York, New York, United States of America
| | - Vinit B. Mahajan
- Omics Laboratory, Department of Ophthalmology and Visual Sciences, University of Iowa, Iowa City, Iowa, United States of America
| | - Gordon Dougan
- Wellcome Trust Sanger Institute, Hinxton, Cambridgeshire, United Kingdom
| | - David J. Adams
- Wellcome Trust Sanger Institute, Hinxton, Cambridgeshire, United Kingdom
| | | | - Karen P. Steel
- Wellcome Trust Sanger Institute, Hinxton, Cambridgeshire, United Kingdom
- * E-mail:
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Hassan Y, Kassab Y, Abd Aziz N, Akram H, Ismail O. The impact of pharmacist-initiated interventions in improving acute coronary syndrome secondary prevention pharmacotherapy prescribing upon discharge. J Clin Pharm Ther 2013; 38:97-100. [DOI: 10.1111/jcpt.12027] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2012] [Accepted: 10/25/2012] [Indexed: 12/01/2022]
Affiliation(s)
- Y. Hassan
- Department of Clinical Pharmacy; University Teknologi MARA; Selangor
| | - Y. Kassab
- Department of Clinical Pharmacy; Universiti Sains Malaysia; Penang
| | - N. Abd Aziz
- Department of Clinical Pharmacy; Universiti Sains Malaysia; Penang
| | - H. Akram
- Department of Clinical Pharmacy; University Teknologi MARA; Selangor
| | - O. Ismail
- Department of Cardiology; Hospital Pulau Pinang; Penang Malaysia
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45
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Racil H, Ben Salem N, Chaouch N, Ismail O, Cheikh Rouhou S, Hantous S, Chabbou A. [Silicoproteinosis: a specific clinical and radiological entity]. Rev Mal Respir 2012. [PMID: 23200588 DOI: 10.1016/j.rmr.2012.05.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
INTRODUCTION Silicoproteinosis is a rare disease, which can cause the rapid onset of respiratory failure following massive exposure to silica dust. CASE REPORT A 25-year-old patient presented with altered state and dyspnea. The diagnosis of military pulmonary tuberculosis was first considered and antituberculous treatment was started. The diagnosis was reconsidered due to a lack of improvement and the discovery of an 18-month history of exposure to silica. The patient had stopped work 6 months prior to hospitalization. High-resolution CT showed air space condensation associated to centrilobular nodules throughout the lungs and multiple mediastinal lymph nodes, suggesting sarcoidosis. Bronchoalveolar lavage (BAL) suggested the diagnosis of lipoproteinosis. Because of discordance between the bacteriological, radiological and the BAL results, a surgical lung biopsy was performed which led to the diagnoses of a secondary lipoproteinosis. The diagnosis of silicoproteinosis was then considered. Over a one-year follow up, the patient's respiratory failure has progressed markedly despite treatment with corticosteroids. CONCLUSION Silicoproteinosis is a distinct pathological entity, the diagnosis of which depends on clinical and radiological features as well as BAL findings, which may avoid the need for more invasive investigations.
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Affiliation(s)
- H Racil
- Service de pneumologie (pavillon II), UR oncologie thoracique, faculté de médecine de Tunis, université de Tunis El Manar, hôpital Abderrahmen Mami, Ariana, Tunisia.
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46
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McIntyre RE, Lakshminarasimhan Chavali P, Ismail O, Carragher DM, Sanchez-Andrade G, Forment JV, Fu B, Del Castillo Velasco-Herrera M, Edwards A, van der Weyden L, Yang F, Ramirez-Solis R, Estabel J, Gallagher FA, Logan DW, Arends MJ, Tsang SH, Mahajan VB, Scudamore CL, White JK, Jackson SP, Gergely F, Adams DJ. Disruption of mouse Cenpj, a regulator of centriole biogenesis, phenocopies Seckel syndrome. PLoS Genet 2012; 8:e1003022. [PMID: 23166506 PMCID: PMC3499256 DOI: 10.1371/journal.pgen.1003022] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Accepted: 08/23/2012] [Indexed: 02/07/2023] Open
Abstract
Disruption of the centromere protein J gene, CENPJ (CPAP, MCPH6, SCKL4), which is a highly conserved and ubiquitiously expressed centrosomal protein, has been associated with primary microcephaly and the microcephalic primordial dwarfism disorder Seckel syndrome. The mechanism by which disruption of CENPJ causes the proportionate, primordial growth failure that is characteristic of Seckel syndrome is unknown. By generating a hypomorphic allele of Cenpj, we have developed a mouse (Cenpj(tm/tm)) that recapitulates many of the clinical features of Seckel syndrome, including intrauterine dwarfism, microcephaly with memory impairment, ossification defects, and ocular and skeletal abnormalities, thus providing clear confirmation that specific mutations of CENPJ can cause Seckel syndrome. Immunohistochemistry revealed increased levels of DNA damage and apoptosis throughout Cenpj(tm/tm) embryos and adult mice showed an elevated frequency of micronucleus induction, suggesting that Cenpj-deficiency results in genomic instability. Notably, however, genomic instability was not the result of defective ATR-dependent DNA damage signaling, as is the case for the majority of genes associated with Seckel syndrome. Instead, Cenpj(tm/tm) embryonic fibroblasts exhibited irregular centriole and centrosome numbers and mono- and multipolar spindles, and many were near-tetraploid with numerical and structural chromosomal abnormalities when compared to passage-matched wild-type cells. Increased cell death due to mitotic failure during embryonic development is likely to contribute to the proportionate dwarfism that is associated with CENPJ-Seckel syndrome.
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Affiliation(s)
- Rebecca E. McIntyre
- Experimental Cancer Genetics, Wellcome Trust Sanger Institute, Hinxton, United Kingdom
| | - Pavithra Lakshminarasimhan Chavali
- Cancer Research UK Cambridge Research Institute, Li Ka Shing Centre and Department of Oncology, University of Cambridge, Cambridge, United Kingdom
| | - Ozama Ismail
- Mouse Genetics Project, Wellcome Trust Sanger Institute, Hinxton, United Kingdom
| | - Damian M. Carragher
- Mouse Genetics Project, Wellcome Trust Sanger Institute, Hinxton, United Kingdom
| | | | - Josep V. Forment
- The Gurdon Institute and Department of Biochemistry, University of Cambridge, Cambridge, United Kingdom
| | - Beiyuan Fu
- Molecular Cytogenetics, Wellcome Trust Sanger Institute, Hinxton, United Kingdom
| | | | - Andrew Edwards
- Wellcome Trust Center for Human Genetics, Oxford, United Kingdom
| | - Louise van der Weyden
- Experimental Cancer Genetics, Wellcome Trust Sanger Institute, Hinxton, United Kingdom
| | - Fengtang Yang
- Molecular Cytogenetics, Wellcome Trust Sanger Institute, Hinxton, United Kingdom
| | | | - Ramiro Ramirez-Solis
- Mouse Genetics Project, Wellcome Trust Sanger Institute, Hinxton, United Kingdom
| | - Jeanne Estabel
- Mouse Genetics Project, Wellcome Trust Sanger Institute, Hinxton, United Kingdom
| | - Ferdia A. Gallagher
- Department of Radiology, Addenbrooke's Hospital, University of Cambridge, Cambridge, United Kingdom
| | - Darren W. Logan
- Genetics of Instinctive Behaviour, Wellcome Trust Sanger Institute, Hinxton, United Kingdom
| | - Mark J. Arends
- Department of Pathology, Addenbrooke's Hospital, University of Cambridge, Cambridge, United Kingdom
| | - Stephen H. Tsang
- Department of Ophthalmology and Visual Sciences, University of Iowa, Iowa City, Iowa, United States of America
- Bernard and Shirlee Brown Glaucoma Laboratory, Department of Ophthalmology, College of Physicians and Surgeons, Columbia University, New York, New York, United States of America
| | - Vinit B. Mahajan
- Department of Ophthalmology and Visual Sciences, University of Iowa, Iowa City, Iowa, United States of America
| | - Cheryl L. Scudamore
- Department of Pathology and Infectious Diseases, Royal Veterinary College, London, United Kingdom
| | - Jacqueline K. White
- Mouse Genetics Project, Wellcome Trust Sanger Institute, Hinxton, United Kingdom
| | - Stephen P. Jackson
- The Gurdon Institute and Department of Biochemistry, University of Cambridge, Cambridge, United Kingdom
| | - Fanni Gergely
- Cancer Research UK Cambridge Research Institute, Li Ka Shing Centre and Department of Oncology, University of Cambridge, Cambridge, United Kingdom
| | - David J. Adams
- Experimental Cancer Genetics, Wellcome Trust Sanger Institute, Hinxton, United Kingdom
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47
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Gerdin AK, Igosheva N, Roberson LA, Ismail O, Karp N, Sanderson M, Cambridge E, Shannon C, Sunter D, Ramirez-Solis R, Bussell J, White JK. Experimental and husbandry procedures as potential modifiers of the results of phenotyping tests. Physiol Behav 2012; 106:602-11. [PMID: 22713295 PMCID: PMC3391687 DOI: 10.1016/j.physbeh.2012.03.026] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2011] [Revised: 03/05/2012] [Accepted: 03/22/2012] [Indexed: 11/30/2022]
Abstract
To maximize the sensitivity of detecting affects of genetic variants in mice, variables have been minimized through the use of inbred mouse lines, by eliminating infectious organisms and controlling environmental variables. However, the impact of standard animal husbandry and experimental procedures on the validity of experimental data is under appreciated. In this study we monitored the impact of these procedures by using parameters that reflect stress and physiological responses to it. Short-term measures included telemetered heart rate and systolic arterial pressure, core body temperature and blood glucose, while longer-term parameters were assessed such as body weight. Male and female C57BL6/NTac mice were subjected to a range of stressors with different perceived severities ranging from repeated blood glucose and core temperature measurement procedures, intra-peritoneal injection and overnight fasting to cage transport and cage changing. Our studies reveal that common husbandry and experimental procedures significantly influence mouse physiology and behaviour. Systolic arterial pressure, heart rate, locomotor activity, core temperature and blood glucose were elevated in response to a range of experimental procedures. Differences between sexes were evident, female mice displayed more sustained cardiovascular responses and locomotor activity than male mice. These results have important implications for the design and implementation of multiple component experiments where the lasting effects of stress from previous tests may modify the outcomes of subsequent ones.
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Affiliation(s)
- Anna-Karin Gerdin
- Mouse Genetics Project, Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton, Cambridge, CB10 1SA, UK.
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48
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Braham E, Yahia M, Ben Rejeb H, Ayadi-Kaddour A, Mlika M, Aouadi S, Ismail O, Kilani T, El Mezni F. Lymphomes de Hodgkin classiques du médiastin : particularités anatomocliniques d’une série tunisienne de 78 cas. Ann Pathol 2012. [DOI: 10.1016/j.annpat.2012.09.086] [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: 10/27/2022]
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49
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Mlika M, Yahia M, Ayadi-Kaddour A, Boudaya S, Daghfous H, Boudabous E, Braham E, Ismail O, El Mezni F. Corrélation entre sous-type histologique et stade clinique dans les adénocarcinomes pulmonaires : une étude rétrospective à propos de 71 cas. Ann Pathol 2012. [DOI: 10.1016/j.annpat.2012.09.091] [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: 10/27/2022]
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50
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Mlika M, Boudabous E, Ayadi-Kaddour A, Abid K, Yahia M, Braham E, Ismail O, Zermani R, El Mezni F. Expression de Bcl-2, Bax et CD95 dans les carcinomes basocellulaires avec réparation déficiente de l’ADN par rapport aux carcinomes basocellulaires avec réparation efficace de l’ADN. Ann Pathol 2012. [DOI: 10.1016/j.annpat.2012.09.108] [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: 11/26/2022]
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