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Thamizhmani L, Ganapathy K, Palaniswamy HP, Patil DS, Purdy SC. Efficacy of acoustic stimulation techniques on cognitive functions in individuals with Alzheimer's disease-a scoping review. Alzheimers Res Ther 2024; 16:174. [PMID: 39085956 DOI: 10.1186/s13195-024-01544-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2024] [Accepted: 07/24/2024] [Indexed: 08/02/2024]
Abstract
BACKGROUND Alzheimer's disease (AD) is a progressive neurodegenerative disorder that severely affects cognitive functions and social behaviors, leading to a significant decline in an individual's quality of life. Auditory processing deficits often precede the clinical symptoms of AD, prompting interest in auditory-based interventions as potential treatments. This scoping review aimed to compile the existing evidence on active and passive auditory-based interventions for individuals with AD and its prodromal stages. METHOD AND RESULTS This scoping review followed Arksey and O'Malley's five-step framework to identify the existing evidence on auditory-based interventions for AD. Four databases (PubMed, Web of Science, CINAHL, and Embase) were used to search for studies on auditory stimulation techniques to treat cognitive decline in AD patients. In total, 14 studies were included in the analysis. Seven studies explored active auditory stimulation techniques, such as the Brain Fitness Program (BrainHQ), aiming to improve cognitive function in individuals with Mild Cognitive Impairment (MCI). The other seven studies focused on passive auditory stimulation, often combined with other sensory stimuli such as light or tactile inputs. Passive stimulation studies have focused mainly on Gamma Entrainment Using Sensory Stimulation (GENUS). The intervention frequency and duration varied across studies, ranging from one session lasting 8 h to a year. Both active and passive auditory stimulation showed potential for enhancing cognitive function in individuals with AD. CONCLUSION The literature suggests that auditory stimulation may positively influence cortical wiring and enhance cognitive abilities. Multimodal interventions that combine auditory stimulation with other sensory or behavioural approaches could yield more substantial effects on global cognition. However, the study design, intervention characteristics and outcome measures varied across studies, underscoring the necessity for standardised reporting. Well-designed studies using standard cognitive assessment protocols are recommended.
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Affiliation(s)
- Leelavathi Thamizhmani
- Department of Speech and Hearing, Manipal College of Health Professions, Manipal Academy of Higher Education, Manipal, India
| | - Kanaka Ganapathy
- Department of Speech and Hearing, Manipal College of Health Professions, Manipal Academy of Higher Education, Manipal, India.
| | - Hari Prakash Palaniswamy
- Department of Speech and Hearing, Manipal College of Health Professions, Manipal Academy of Higher Education, Manipal, India
| | - Divya Sussana Patil
- Centre for Evidence-Informed Decision-Making, Department of Health Information, Prasanna School of Public Health, Manipal Academy of Higher Education, Manipal, India
| | - Suzanne Carolyn Purdy
- School of Psychology (Speech Science), Faculty of Science, The University of Auckland, Auckland, New Zealand
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Khedraoui M, Abchir O, Nour H, Yamari I, Errougui A, Samadi A, Chtita S. An In Silico Study Based on QSAR and Molecular Docking and Molecular Dynamics Simulation for the Discovery of Novel Potent Inhibitor against AChE. Pharmaceuticals (Basel) 2024; 17:830. [PMID: 39065681 PMCID: PMC11280381 DOI: 10.3390/ph17070830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2024] [Revised: 06/09/2024] [Accepted: 06/17/2024] [Indexed: 07/28/2024] Open
Abstract
Acetylcholinesterase (AChE) is one of the main drug targets for treating Alzheimer's disease. This current study relies on multiple molecular modeling approaches to develop new potent inhibitors of AChE. We explored a 2D QSAR study using the statistical method of multiple linear regression based on a set of substituted 5-phenyl-1,3,4-oxadiazole and N-benzylpiperidine analogs, which were recently synthesized and proved their inhibitory activities against acetylcholinesterase (AChE). The molecular descriptors, polar surface area, dipole moment, and molecular weight are the key structural properties governing AChE inhibition activity. The MLR model was selected based on its statistical parameters: R2 = 0.701, R2test = 0.76, Q2CV = 0.638, and RMSE = 0.336, demonstrating its predictive reliability. Randomization tests, VIF tests, and applicability domain tests were adopted to verify the model's robustness. As a result, 11 new molecules were designed with higher anti-Alzheimer's activities than the model molecule. We demonstrated their improved pharmacokinetic properties through an in silico ADMET study. A molecular docking study was conducted to explore their AChE inhibition mechanisms and binding affinities in the active site. The binding scores of compounds M1, M2, and M6 were (-12.6 kcal/mol), (-13 kcal/mol), and (-12.4 kcal/mol), respectively, which are higher than the standard inhibitor Donepezil with a binding score of (-10.8 kcal/mol). Molecular dynamics simulations over 100 ns were used to validate the molecular docking results, indicating that compounds M1 and M2 remain stable in the active site, confirming their potential as promising anti-AChE inhibitors.
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Affiliation(s)
- Meriem Khedraoui
- Laboratory of Analytical and Molecular Chemistry, Faculty of Sciences Ben M’Sik, Hassan II University of Casablanca, Casablanca 20670, Morocco; (M.K.); (O.A.); (H.N.); (I.Y.); (A.E.)
| | - Oussama Abchir
- Laboratory of Analytical and Molecular Chemistry, Faculty of Sciences Ben M’Sik, Hassan II University of Casablanca, Casablanca 20670, Morocco; (M.K.); (O.A.); (H.N.); (I.Y.); (A.E.)
| | - Hassan Nour
- Laboratory of Analytical and Molecular Chemistry, Faculty of Sciences Ben M’Sik, Hassan II University of Casablanca, Casablanca 20670, Morocco; (M.K.); (O.A.); (H.N.); (I.Y.); (A.E.)
| | - Imane Yamari
- Laboratory of Analytical and Molecular Chemistry, Faculty of Sciences Ben M’Sik, Hassan II University of Casablanca, Casablanca 20670, Morocco; (M.K.); (O.A.); (H.N.); (I.Y.); (A.E.)
| | - Abdelkbir Errougui
- Laboratory of Analytical and Molecular Chemistry, Faculty of Sciences Ben M’Sik, Hassan II University of Casablanca, Casablanca 20670, Morocco; (M.K.); (O.A.); (H.N.); (I.Y.); (A.E.)
| | - Abdelouahid Samadi
- Department of Chemistry, College of Science, United Arab Emirates University, Al Ain P.O. Box 15551, United Arab Emirates
| | - Samir Chtita
- Laboratory of Analytical and Molecular Chemistry, Faculty of Sciences Ben M’Sik, Hassan II University of Casablanca, Casablanca 20670, Morocco; (M.K.); (O.A.); (H.N.); (I.Y.); (A.E.)
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Khalilullah KMI, Agcaoglu O, Sui J, Duda M, Adali T, Calhoun VD. Parallel Multilink Group Joint ICA: Fusion of 3D Structural and 4D Functional Data Across Multiple Resting fMRI Networks. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.21.586091. [PMID: 38585901 PMCID: PMC10996497 DOI: 10.1101/2024.03.21.586091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/09/2024]
Abstract
Multimodal neuroimaging research plays a pivotal role in understanding the complexities of the human brain and its disorders. Independent component analysis (ICA) has emerged as a widely used and powerful tool for disentangling mixed independent sources, particularly in the analysis of functional magnetic resonance imaging (fMRI) data. This paper extends the use of ICA as a unifying framework for multimodal fusion, introducing a novel approach termed parallel multilink group joint ICA (pmg-jICA). The method allows for the fusion of gray matter maps from structural MRI (sMRI) data to multiple fMRI intrinsic networks, addressing the limitations of previous models. The effectiveness of pmg-jICA is demonstrated through its application to an Alzheimer's dataset, yielding linked structure-function outputs for 53 brain networks. Our approach leverages the complementary information from various imaging modalities, providing a unique perspective on brain alterations in Alzheimer's disease. The pmg-jICA identifies several components with significant differences between HC and AD groups including thalamus, caudate, putamen with in the subcortical (SC) domain, insula, parahippocampal gyrus within the cognitive control (CC) domain, and the lingual gyrus within the visual (VS) domain, providing localized insights into the links between AD and specific brain regions. In addition, because we link across multiple brain networks, we can also compute functional network connectivity (FNC) from spatial maps and subject loadings, providing a detailed exploration of the relationships between different brain regions and allowing us to visualize spatial patterns and loading parameters in sMRI along with intrinsic networks and FNC from the fMRI data. In essence, developed approach combines concepts from joint ICA and group ICA to provide a rich set of output characterizing data-driven links between covarying gray matter networks, and a (potentially large number of) resting fMRI networks allowing further study in the context of structure/function links. We demonstrate the utility of the approach by highlighting key structure/function disruptions in Alzheimer's individuals.
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Affiliation(s)
- K M Ibrahim Khalilullah
- Tri-institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS), Georgia State University, Georgia Institute of Technology, Emory University, Atlanta, Georgia, USA
| | - Oktay Agcaoglu
- Tri-institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS), Georgia State University, Georgia Institute of Technology, Emory University, Atlanta, Georgia, USA
| | - Jing Sui
- Tri-institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS), Georgia State University, Georgia Institute of Technology, Emory University, Atlanta, Georgia, USA
| | - Marlena Duda
- Tri-institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS), Georgia State University, Georgia Institute of Technology, Emory University, Atlanta, Georgia, USA
| | - Tülay Adali
- Department of Electrical and Computer Engineering, University of Maryland, Baltimore, Maryland, USA
| | - Vince D Calhoun
- Tri-institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS), Georgia State University, Georgia Institute of Technology, Emory University, Atlanta, Georgia, USA
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Nagaraj NK. Hearing Loss and Cognitive Decline in the Aging Population: Emerging Perspectives in Audiology. Audiol Res 2024; 14:479-492. [PMID: 38920961 PMCID: PMC11200945 DOI: 10.3390/audiolres14030040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 05/16/2024] [Accepted: 05/17/2024] [Indexed: 06/27/2024] Open
Abstract
In this perspective article, the author explores the connections between hearing loss, central auditory processing, and cognitive decline, offering insights into the complex dynamics at play. Drawing upon a range of studies, the relationship between age-related central auditory processing disorders and Alzheimer's disease is discussed, with the aim of enhancing our understanding of these interconnected conditions. Highlighting the evolving significance of audiologists in the dual management of cognitive health and hearing impairments, the author focuses on their role in identifying early signs of cognitive impairment and evaluates various cognitive screening tools used in this context. The discussion extends to adaptations of hearing assessments for older adults, especially those diagnosed with dementia, and highlights the significance of objective auditory electrophysiological tests. These tests are presented as vital in assessing the influence of aging and Alzheimer's disease on auditory processing capabilities and to signal cognitive dysfunction. The article underscores the critical role of audiologists in addressing the challenges faced by the aging population. The perspective calls for further research to improve diagnostic and therapeutic strategies in audiology, and emphasizes the need for a multidisciplinary approach in tackling the nexus of hearing loss, auditory processing, and cognitive decline.
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Affiliation(s)
- Naveen K Nagaraj
- Cognitive Hearing Science Lab, Communicative Disorders & Deaf Education, Utah State University, Logan, UT 84322, USA
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Ahmad N, Lesa KN, Ujiantari NSO, Sudarmanto A, Fakhrudin N, Ikawati Z. Development of White Cabbage, Coffee, and Red Onion Extracts as Natural Phosphodiesterase-4B (PDE4B) Inhibitors for Cognitive Dysfunction: In Vitro and In Silico Studies. Adv Pharmacol Pharm Sci 2024; 2024:1230239. [PMID: 38808119 PMCID: PMC11132833 DOI: 10.1155/2024/1230239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 04/15/2024] [Accepted: 04/25/2024] [Indexed: 05/30/2024] Open
Abstract
Human cognition fundamentally depends on memory. Alzheimer's disease exhibits a strong correlation with a decline in this factor. Phosphodiesterase-4 B (PDE4B) plays a crucial role in neurodegenerative disorders, and its inhibition is one of the promising approaches for memory enhancement. This study aimed to identify secondary metabolites in white cabbage, coffee, and red onion extracts and identify their molecular interaction with PDE4B by in silico and in vitro experiments. Crushed white cabbage and red onion were macerated separately with ethanol to yield respective extracts, and ground coffee was boiled with water to produce aqueous extract. Thin layer chromatography (TLC)-densitometry was used to examine the phytochemicals present in white cabbage, coffee, and red onion extracts. Molecular docking studies were performed to know the interaction of test compounds with PDE4B. TLC-densitometry analysis showed that chlorogenic acid and quercetin were detected as major compounds in coffee and red onion extracts, respectively. In silico studies revealed that alpha-tocopherol (binding free energy (∆Gbind) = -38.00 kcal/mol) has the strongest interaction with PDE4B whereas chlorogenic acid (∆Gbind = -21.50 kcal/mol) and quercetin (∆Gbind = -17.25 kcal/mol) exhibited moderate interaction. In vitro assay showed that the combination extracts (cabbage, coffee, and red onion) had a stronger activity (half-maximal inhibitory concentration (IC50) = 0.12 ± 0.03 µM) than combination standards (sinigrin, chlorogenic acid, and quercetin) (IC50 = 0.17 ± 0.03 µM) and rolipram (IC50 = 0.15 ± 0.008 µM). Thus, the combination extracts are a promising cognitive enhancer by blocking PDE4B activity.
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Affiliation(s)
- Nazir Ahmad
- Department of Pharmacology and Clinical Pharmacy, Faculty of Pharmacy, Universitas Gadjah Mada, Sekip Utara, Yogyakarta 55281, Indonesia
| | - Kaisun Nesa Lesa
- Department of Food and Nutritional Science, Khulna City Corporation Women's College, Affiliated to Khulna University, Khulna, Bangladesh
- Department of Food and Agricultural Product Technology, Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia
- Department of Pediatrics, Nihon University Hospital, Tokyo, Japan
- Department of Nutrition and Food Technology, Jessore University of Science and Technology, Jessore, Bangladesh
| | - Navista Sri Octa Ujiantari
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Universitas Gadjah Mada, Sekip Utara, Yogyakarta 55281, Indonesia
| | - Ari Sudarmanto
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Universitas Gadjah Mada, Sekip Utara, Yogyakarta 55281, Indonesia
| | - Nanang Fakhrudin
- Department of Pharmaceutical Biology, Faculty of Pharmacy, Universitas Gadjah Mada, Sekip Utara, Yogyakarta 55281, Indonesia
- Medicinal Plants and Natural Products Research Center, Faculty of Pharmacy, Universitas Gadjah Mada, Sekip Utara, Sleman 55281, Yogyakarta, Indonesia
| | - Zullies Ikawati
- Department of Pharmacology and Clinical Pharmacy, Faculty of Pharmacy, Universitas Gadjah Mada, Sekip Utara, Yogyakarta 55281, Indonesia
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Medel V, Delano PH, Belkhiria C, Leiva A, De Gatica C, Vidal V, Navarro CF, Martín SS, Martínez M, Gierke C, García X, Cerda M, Vergara R, Delgado C, Farías GA. Cochlear dysfunction as an early biomarker of cognitive decline in normal hearing and mild hearing loss. ALZHEIMER'S & DEMENTIA (AMSTERDAM, NETHERLANDS) 2024; 16:e12467. [PMID: 38312514 PMCID: PMC10835081 DOI: 10.1002/dad2.12467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 06/27/2023] [Accepted: 07/01/2023] [Indexed: 02/06/2024]
Abstract
INTRODUCTION Age-related hearing loss is an important risk factor for cognitive decline. However, audiogram thresholds are not good estimators of dementia risk in subjects with normal hearing or mild hearing loss. Here we propose to use distortion product otoacoustic emissions (DPOAEs) as an objective and sensitive tool to estimate the risk of cognitive decline in older adults with normal hearing or mild hearing loss. METHODS We assessed neuropsychological, brain magnetic resonance imaging, and auditory analyses on 94 subjects > 64 years of age. RESULTS We found that cochlear dysfunction, measured by DPOAEs-and not by conventional audiometry-was associated with Clinical Dementia Rating Sum of Boxes (CDR-SoB) classification and brain atrophy in the group with mild hearing loss (25 to 40 dB) and normal hearing (<25 dB). DISCUSSION Our findings suggest that DPOAEs may be a non-invasive tool for detecting neurodegeneration and cognitive decline in the older adults, potentially allowing for early intervention.
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Affiliation(s)
- Vicente Medel
- Departamento de Neurociencia Facultad de Medicina Universidad de Chile Santiago Chile
- Latin American Brain Health Institute (BrainLat) Universidad Adolfo Ibáñez Santiago Chile
| | - Paul H Delano
- Departamento de Neurociencia Facultad de Medicina Universidad de Chile Santiago Chile
- Servicio Otorrinolaringología Hospital Clínico de la Universidad de Chile Santiago Chile
- Advanced Center for Electrical and Electronical Engineer (AC3E) Valparaíso Chile
- Biomedical Neuroscience Institute (BNI) Facultad de Medicina Universidad de Chile Santiago Chile
| | - Chama Belkhiria
- Departamento de Neurociencia Facultad de Medicina Universidad de Chile Santiago Chile
| | - Alexis Leiva
- Departamento de Neurociencia Facultad de Medicina Universidad de Chile Santiago Chile
| | - Cristina De Gatica
- Departamento de Neurociencia Facultad de Medicina Universidad de Chile Santiago Chile
| | - Victor Vidal
- Departamento de Neurociencia Facultad de Medicina Universidad de Chile Santiago Chile
| | - Carlos F Navarro
- Biomedical Neuroscience Institute (BNI) Facultad de Medicina Universidad de Chile Santiago Chile
- Integrative Biology Program Institute of Biomedical Sciences Center for Medical Informatics and Telemedicine Faculty of Medicine Universidad de Chile Santiago Chile
| | - Simon San Martín
- Departamento de Neurociencia Facultad de Medicina Universidad de Chile Santiago Chile
- Biomedical Neuroscience Institute (BNI) Facultad de Medicina Universidad de Chile Santiago Chile
| | - Melissa Martínez
- Servicio Neurología y Neurocirugía Hospital Clínico de la Universidad de Chile Santiago Chile
| | - Christine Gierke
- Departamento de Neurociencia Facultad de Medicina Universidad de Chile Santiago Chile
- Servicio Neurología y Neurocirugía Hospital Clínico de la Universidad de Chile Santiago Chile
| | - Ximena García
- Departamento de Neurociencia Facultad de Medicina Universidad de Chile Santiago Chile
- Advanced Clinical Research Center (CICA) Hospital Clínico Universidad de Chile Santiago Chile
| | - Mauricio Cerda
- Biomedical Neuroscience Institute (BNI) Facultad de Medicina Universidad de Chile Santiago Chile
- Integrative Biology Program Institute of Biomedical Sciences Center for Medical Informatics and Telemedicine Faculty of Medicine Universidad de Chile Santiago Chile
| | - Rodrigo Vergara
- Facultad de Psicología y Humanidades Universidad San Sebastián Sede Valdivia Chile
- Centro Nacional de Inteligencia Artificial (CENIA), Chile
| | - Carolina Delgado
- Departamento de Neurociencia Facultad de Medicina Universidad de Chile Santiago Chile
- Servicio Neurología y Neurocirugía Hospital Clínico de la Universidad de Chile Santiago Chile
| | - Gonzalo A Farías
- Departamento de Neurociencia Facultad de Medicina Universidad de Chile Santiago Chile
- Servicio Neurología y Neurocirugía Hospital Clínico de la Universidad de Chile Santiago Chile
- Advanced Clinical Research Center (CICA) Hospital Clínico Universidad de Chile Santiago Chile
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Ferguson MA, Nakano K, Jayakody DMP. Clinical Assessment Tools for the Detection of Cognitive Impairment and Hearing Loss in the Ageing Population: A Scoping Review. Clin Interv Aging 2023; 18:2041-2051. [PMID: 38088948 PMCID: PMC10713803 DOI: 10.2147/cia.s409114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 11/07/2023] [Indexed: 12/18/2023] Open
Abstract
Objective There is a strong association between cognitive impairment and hearing loss, both highly prevalent in the ageing population. Early detection of both hearing loss and cognitive impairment is essential in the management of these conditions to ensure effective and informed decisions on healthcare. The main objective was to identify existing and emerging cognitive and auditory assessment tools used in clinical settings (eg, memory clinics, audiology clinics), which manage the ageing population. Methods A scoping review of peer-reviewed publications and results were reported according to the PRISMA-ScR guidelines. Results A total of 289 articles were selected for data extraction. The majority of studies (76.1%) were conducted in 2017 or later. Tests of global cognitive function (ie, Mini-Mental State Exam, Montreal Cognitive Assessment) were the most commonly used method to detect cognitive impairment in hearing healthcare settings. Behavioral hearing testing (ie, pure-tone audiometry) was the most commonly used method to detect hearing loss in cognitive healthcare settings. Objective, physiological measures were seldom used across disciplines. Conclusion Preferences among clinicians for short, accessible tests likely explain the use of tests of global cognitive function and behavioral hearing tests. Rapidly evolving literature has identified inherent limitations of administering global cognitive function tests and pure-tone testing in an ageing population. Using electrophysiological measures as an adjunct to standard methods of assessment may provide more reliable information for clinical recommendations in those with cognitive and hearing impairment, and subsequently achieve better healthcare outcomes.
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Affiliation(s)
- Melanie A Ferguson
- School of Allied Health, Faculty of Health Sciences, Curtin University, Perth, Australia
- Curtin enAble Institute, Faculty of Health Sciences, Curtin University, Perth, Australia
- Centre for Ear Sciences, Medical School, University of Western Australia, Perth, Australia
| | - Kento Nakano
- Ear Science Institute Australia, Perth, Australia
| | - Dona M P Jayakody
- School of Allied Health, Faculty of Health Sciences, Curtin University, Perth, Australia
- Centre for Ear Sciences, Medical School, University of Western Australia, Perth, Australia
- Ear Science Institute Australia, Perth, Australia
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Wee J, Tan XR, Gunther SH, Ihsan M, Leow MKS, Tan DSY, Eriksson JG, Lee JKW. Effects of Medications on Heat Loss Capacity in Chronic Disease Patients: Health Implications Amidst Global Warming. Pharmacol Rev 2023; 75:1140-1166. [PMID: 37328294 DOI: 10.1124/pharmrev.122.000782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 04/20/2023] [Accepted: 05/31/2023] [Indexed: 06/18/2023] Open
Abstract
Pharmacological agents used to treat or manage diseases can modify the level of heat strain experienced by chronically ill and elderly patients via different mechanistic pathways. Human thermoregulation is a crucial homeostatic process that maintains body temperature within a narrow range during heat stress through dry (i.e., increasing skin blood flow) and evaporative (i.e., sweating) heat loss, as well as active inhibition of thermogenesis, which is crucial to avoid overheating. Medications can independently and synergistically interact with aging and chronic disease to alter homeostatic responses to rising body temperature during heat stress. This review focuses on the physiologic changes, with specific emphasis on thermolytic processes, associated with medication use during heat stress. The review begins by providing readers with a background of the global chronic disease burden. Human thermoregulation and aging effects are then summarized to give an understanding of the unique physiologic changes faced by older adults. The effects of common chronic diseases on temperature regulation are outlined in the main sections. Physiologic impacts of common medications used to treat these diseases are reviewed in detail, with emphasis on the mechanisms by which these medications alter thermolysis during heat stress. The review concludes by providing perspectives on the need to understand the effects of medication use in hot environments, as well as a summary table of all clinical considerations and research needs of the medications included in this review. SIGNIFICANCE STATEMENT: Long-term medications modulate thermoregulatory function, resulting in excess physiological strain and predisposing patients to adverse health outcomes during prolonged exposures to extreme heat during rest and physical work (e.g., exercise). Understanding the medication-specific mechanisms of altered thermoregulation has importance in both clinical and research settings, paving the way for work toward refining current medication prescription recommendations and formulating mitigation strategies for adverse drug effects in the heat in chronically ill patients.
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Affiliation(s)
- Jericho Wee
- Human Potential Translational Research Programme, Yong Loo Lin School of Medicine (J.W., X.R.T., S.H.G., M.I., M.K.S.L., J.G.E., J.K.W.L.), Department of Pharmacy, Faculty of Science, (D.S.-Y.T), Department of Physiology, Yong Loo Lin School of Medicine (J.K.W.L.), Heat Resilience and Performance Centre, Yong Loo Lin School of Medicine (J.K.W.L.), National University of Singapore, Singapore; Health and Social Sciences, Singapore Institute of Technology, Singapore (X.R.T.); Campus for Research Excellence and Technological Enterprise, Singapore (S.H.G., J.K.W.L.); Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore (M.K.S.L.); Duke-National University of Singapore Medical School, Singapore (M.K.S.L.); Department of Endocrinology, Division of Medicine, Tan Tock Seng Hospital, Singapore (M.K.S.L.); Singapore Institute for Clinical Sciences, Agency for Science, Technology and Research, Singapore (M.K.S.L., J.G.E.); Folkhalsan Research Center, Helsinki, Finland (J.G.E.); Department of General Practice and Primary Health Care, University of Helsinki, and Helsinki University Hospital, University of Helsinki, Helsinki, Finland (J.G.E.); and Department of Obstetrics & Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore and National University Health System, Singapore (J.G.E.)
| | - Xiang Ren Tan
- Human Potential Translational Research Programme, Yong Loo Lin School of Medicine (J.W., X.R.T., S.H.G., M.I., M.K.S.L., J.G.E., J.K.W.L.), Department of Pharmacy, Faculty of Science, (D.S.-Y.T), Department of Physiology, Yong Loo Lin School of Medicine (J.K.W.L.), Heat Resilience and Performance Centre, Yong Loo Lin School of Medicine (J.K.W.L.), National University of Singapore, Singapore; Health and Social Sciences, Singapore Institute of Technology, Singapore (X.R.T.); Campus for Research Excellence and Technological Enterprise, Singapore (S.H.G., J.K.W.L.); Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore (M.K.S.L.); Duke-National University of Singapore Medical School, Singapore (M.K.S.L.); Department of Endocrinology, Division of Medicine, Tan Tock Seng Hospital, Singapore (M.K.S.L.); Singapore Institute for Clinical Sciences, Agency for Science, Technology and Research, Singapore (M.K.S.L., J.G.E.); Folkhalsan Research Center, Helsinki, Finland (J.G.E.); Department of General Practice and Primary Health Care, University of Helsinki, and Helsinki University Hospital, University of Helsinki, Helsinki, Finland (J.G.E.); and Department of Obstetrics & Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore and National University Health System, Singapore (J.G.E.)
| | - Samuel H Gunther
- Human Potential Translational Research Programme, Yong Loo Lin School of Medicine (J.W., X.R.T., S.H.G., M.I., M.K.S.L., J.G.E., J.K.W.L.), Department of Pharmacy, Faculty of Science, (D.S.-Y.T), Department of Physiology, Yong Loo Lin School of Medicine (J.K.W.L.), Heat Resilience and Performance Centre, Yong Loo Lin School of Medicine (J.K.W.L.), National University of Singapore, Singapore; Health and Social Sciences, Singapore Institute of Technology, Singapore (X.R.T.); Campus for Research Excellence and Technological Enterprise, Singapore (S.H.G., J.K.W.L.); Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore (M.K.S.L.); Duke-National University of Singapore Medical School, Singapore (M.K.S.L.); Department of Endocrinology, Division of Medicine, Tan Tock Seng Hospital, Singapore (M.K.S.L.); Singapore Institute for Clinical Sciences, Agency for Science, Technology and Research, Singapore (M.K.S.L., J.G.E.); Folkhalsan Research Center, Helsinki, Finland (J.G.E.); Department of General Practice and Primary Health Care, University of Helsinki, and Helsinki University Hospital, University of Helsinki, Helsinki, Finland (J.G.E.); and Department of Obstetrics & Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore and National University Health System, Singapore (J.G.E.)
| | - Mohammed Ihsan
- Human Potential Translational Research Programme, Yong Loo Lin School of Medicine (J.W., X.R.T., S.H.G., M.I., M.K.S.L., J.G.E., J.K.W.L.), Department of Pharmacy, Faculty of Science, (D.S.-Y.T), Department of Physiology, Yong Loo Lin School of Medicine (J.K.W.L.), Heat Resilience and Performance Centre, Yong Loo Lin School of Medicine (J.K.W.L.), National University of Singapore, Singapore; Health and Social Sciences, Singapore Institute of Technology, Singapore (X.R.T.); Campus for Research Excellence and Technological Enterprise, Singapore (S.H.G., J.K.W.L.); Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore (M.K.S.L.); Duke-National University of Singapore Medical School, Singapore (M.K.S.L.); Department of Endocrinology, Division of Medicine, Tan Tock Seng Hospital, Singapore (M.K.S.L.); Singapore Institute for Clinical Sciences, Agency for Science, Technology and Research, Singapore (M.K.S.L., J.G.E.); Folkhalsan Research Center, Helsinki, Finland (J.G.E.); Department of General Practice and Primary Health Care, University of Helsinki, and Helsinki University Hospital, University of Helsinki, Helsinki, Finland (J.G.E.); and Department of Obstetrics & Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore and National University Health System, Singapore (J.G.E.)
| | - Melvin Khee Shing Leow
- Human Potential Translational Research Programme, Yong Loo Lin School of Medicine (J.W., X.R.T., S.H.G., M.I., M.K.S.L., J.G.E., J.K.W.L.), Department of Pharmacy, Faculty of Science, (D.S.-Y.T), Department of Physiology, Yong Loo Lin School of Medicine (J.K.W.L.), Heat Resilience and Performance Centre, Yong Loo Lin School of Medicine (J.K.W.L.), National University of Singapore, Singapore; Health and Social Sciences, Singapore Institute of Technology, Singapore (X.R.T.); Campus for Research Excellence and Technological Enterprise, Singapore (S.H.G., J.K.W.L.); Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore (M.K.S.L.); Duke-National University of Singapore Medical School, Singapore (M.K.S.L.); Department of Endocrinology, Division of Medicine, Tan Tock Seng Hospital, Singapore (M.K.S.L.); Singapore Institute for Clinical Sciences, Agency for Science, Technology and Research, Singapore (M.K.S.L., J.G.E.); Folkhalsan Research Center, Helsinki, Finland (J.G.E.); Department of General Practice and Primary Health Care, University of Helsinki, and Helsinki University Hospital, University of Helsinki, Helsinki, Finland (J.G.E.); and Department of Obstetrics & Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore and National University Health System, Singapore (J.G.E.)
| | - Doreen Su-Yin Tan
- Human Potential Translational Research Programme, Yong Loo Lin School of Medicine (J.W., X.R.T., S.H.G., M.I., M.K.S.L., J.G.E., J.K.W.L.), Department of Pharmacy, Faculty of Science, (D.S.-Y.T), Department of Physiology, Yong Loo Lin School of Medicine (J.K.W.L.), Heat Resilience and Performance Centre, Yong Loo Lin School of Medicine (J.K.W.L.), National University of Singapore, Singapore; Health and Social Sciences, Singapore Institute of Technology, Singapore (X.R.T.); Campus for Research Excellence and Technological Enterprise, Singapore (S.H.G., J.K.W.L.); Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore (M.K.S.L.); Duke-National University of Singapore Medical School, Singapore (M.K.S.L.); Department of Endocrinology, Division of Medicine, Tan Tock Seng Hospital, Singapore (M.K.S.L.); Singapore Institute for Clinical Sciences, Agency for Science, Technology and Research, Singapore (M.K.S.L., J.G.E.); Folkhalsan Research Center, Helsinki, Finland (J.G.E.); Department of General Practice and Primary Health Care, University of Helsinki, and Helsinki University Hospital, University of Helsinki, Helsinki, Finland (J.G.E.); and Department of Obstetrics & Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore and National University Health System, Singapore (J.G.E.)
| | - Johan G Eriksson
- Human Potential Translational Research Programme, Yong Loo Lin School of Medicine (J.W., X.R.T., S.H.G., M.I., M.K.S.L., J.G.E., J.K.W.L.), Department of Pharmacy, Faculty of Science, (D.S.-Y.T), Department of Physiology, Yong Loo Lin School of Medicine (J.K.W.L.), Heat Resilience and Performance Centre, Yong Loo Lin School of Medicine (J.K.W.L.), National University of Singapore, Singapore; Health and Social Sciences, Singapore Institute of Technology, Singapore (X.R.T.); Campus for Research Excellence and Technological Enterprise, Singapore (S.H.G., J.K.W.L.); Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore (M.K.S.L.); Duke-National University of Singapore Medical School, Singapore (M.K.S.L.); Department of Endocrinology, Division of Medicine, Tan Tock Seng Hospital, Singapore (M.K.S.L.); Singapore Institute for Clinical Sciences, Agency for Science, Technology and Research, Singapore (M.K.S.L., J.G.E.); Folkhalsan Research Center, Helsinki, Finland (J.G.E.); Department of General Practice and Primary Health Care, University of Helsinki, and Helsinki University Hospital, University of Helsinki, Helsinki, Finland (J.G.E.); and Department of Obstetrics & Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore and National University Health System, Singapore (J.G.E.)
| | - Jason Kai Wei Lee
- Human Potential Translational Research Programme, Yong Loo Lin School of Medicine (J.W., X.R.T., S.H.G., M.I., M.K.S.L., J.G.E., J.K.W.L.), Department of Pharmacy, Faculty of Science, (D.S.-Y.T), Department of Physiology, Yong Loo Lin School of Medicine (J.K.W.L.), Heat Resilience and Performance Centre, Yong Loo Lin School of Medicine (J.K.W.L.), National University of Singapore, Singapore; Health and Social Sciences, Singapore Institute of Technology, Singapore (X.R.T.); Campus for Research Excellence and Technological Enterprise, Singapore (S.H.G., J.K.W.L.); Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore (M.K.S.L.); Duke-National University of Singapore Medical School, Singapore (M.K.S.L.); Department of Endocrinology, Division of Medicine, Tan Tock Seng Hospital, Singapore (M.K.S.L.); Singapore Institute for Clinical Sciences, Agency for Science, Technology and Research, Singapore (M.K.S.L., J.G.E.); Folkhalsan Research Center, Helsinki, Finland (J.G.E.); Department of General Practice and Primary Health Care, University of Helsinki, and Helsinki University Hospital, University of Helsinki, Helsinki, Finland (J.G.E.); and Department of Obstetrics & Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore and National University Health System, Singapore (J.G.E.)
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9
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Jiang J, Johnson JCS, Requena-Komuro MC, Benhamou E, Sivasathiaseelan H, Chokesuwattanaskul A, Nelson A, Nortley R, Weil RS, Volkmer A, Marshall CR, Bamiou DE, Warren JD, Hardy CJD. Comprehension of acoustically degraded speech in Alzheimer's disease and primary progressive aphasia. Brain 2023; 146:4065-4076. [PMID: 37184986 PMCID: PMC10545509 DOI: 10.1093/brain/awad163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 04/20/2023] [Accepted: 04/27/2023] [Indexed: 05/17/2023] Open
Abstract
Successful communication in daily life depends on accurate decoding of speech signals that are acoustically degraded by challenging listening conditions. This process presents the brain with a demanding computational task that is vulnerable to neurodegenerative pathologies. However, despite recent intense interest in the link between hearing impairment and dementia, comprehension of acoustically degraded speech in these diseases has been little studied. Here we addressed this issue in a cohort of 19 patients with typical Alzheimer's disease and 30 patients representing the three canonical syndromes of primary progressive aphasia (non-fluent/agrammatic variant primary progressive aphasia; semantic variant primary progressive aphasia; logopenic variant primary progressive aphasia), compared to 25 healthy age-matched controls. As a paradigm for the acoustically degraded speech signals of daily life, we used noise-vocoding: synthetic division of the speech signal into frequency channels constituted from amplitude-modulated white noise, such that fewer channels convey less spectrotemporal detail thereby reducing intelligibility. We investigated the impact of noise-vocoding on recognition of spoken three-digit numbers and used psychometric modelling to ascertain the threshold number of noise-vocoding channels required for 50% intelligibility by each participant. Associations of noise-vocoded speech intelligibility threshold with general demographic, clinical and neuropsychological characteristics and regional grey matter volume (defined by voxel-based morphometry of patients' brain images) were also assessed. Mean noise-vocoded speech intelligibility threshold was significantly higher in all patient groups than healthy controls, and significantly higher in Alzheimer's disease and logopenic variant primary progressive aphasia than semantic variant primary progressive aphasia (all P < 0.05). In a receiver operating characteristic analysis, vocoded intelligibility threshold discriminated Alzheimer's disease, non-fluent variant and logopenic variant primary progressive aphasia patients very well from healthy controls. Further, this central hearing measure correlated with overall disease severity but not with peripheral hearing or clear speech perception. Neuroanatomically, after correcting for multiple voxel-wise comparisons in predefined regions of interest, impaired noise-vocoded speech comprehension across syndromes was significantly associated (P < 0.05) with atrophy of left planum temporale, angular gyrus and anterior cingulate gyrus: a cortical network that has previously been widely implicated in processing degraded speech signals. Our findings suggest that the comprehension of acoustically altered speech captures an auditory brain process relevant to daily hearing and communication in major dementia syndromes, with novel diagnostic and therapeutic implications.
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Affiliation(s)
- Jessica Jiang
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London WC1N 3AR, UK
| | - Jeremy C S Johnson
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London WC1N 3AR, UK
| | - Maï-Carmen Requena-Komuro
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London WC1N 3AR, UK
- Kidney Cancer Program, UT Southwestern Medical Centre, Dallas, TX 75390, USA
| | - Elia Benhamou
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London WC1N 3AR, UK
| | - Harri Sivasathiaseelan
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London WC1N 3AR, UK
| | - Anthipa Chokesuwattanaskul
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London WC1N 3AR, UK
- Division of Neurology, Department of Internal Medicine, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok 10330, Thailand
| | - Annabel Nelson
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London WC1N 3AR, UK
| | - Ross Nortley
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London WC1N 3AR, UK
- Wexham Park Hospital, Frimley Health NHS Foundation Trust, Slough SL2 4HL, UK
| | - Rimona S Weil
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London WC1N 3AR, UK
| | - Anna Volkmer
- Division of Psychology and Language Sciences, University College London, London WC1H 0AP, UK
| | - Charles R Marshall
- Preventive Neurology Unit, Wolfson Institute of Population Health, Queen Mary University of London, London EC1M 6BQ, UK
| | - Doris-Eva Bamiou
- UCL Ear Institute and UCL/UCLH Biomedical Research Centre, National Institute of Health Research, University College London, London WC1X 8EE, UK
| | - Jason D Warren
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London WC1N 3AR, UK
| | - Chris J D Hardy
- Dementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London WC1N 3AR, UK
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10
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Byun MS, Chang M, Yi D, Ahn H, Han D, Jeon S, Jang H, Lee DY, Oh SH. Association of Central Auditory Processing Dysfunction With Preclinical Alzheimer's Disease. Otolaryngol Head Neck Surg 2023; 169:112-119. [PMID: 36939433 PMCID: PMC10846842 DOI: 10.1002/ohn.228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 11/13/2022] [Accepted: 11/21/2022] [Indexed: 01/30/2023]
Abstract
OBJECTIVE To investigate whether central auditory processing dysfunction measured by the dichotic digit test-1 digit (DDT1) is present in preclinical Alzheimer's disease (AD) individuals who are cognitively normal (CN) older adults with the cerebral beta-amyloid (Aβ) deposition and to explore the potential of the DDT1 as a screening test for preclinical AD. STUDY DESIGN Cross-sectional design. SETTING A prospective observational cohort study. METHODS CN older adults with a global clinical dementia rating score of 0 were included. The hearing test battery including pure-tone audiometry, speech audiometry, distortion product otoacoustic emission, and DDT1 was administered to participants. RESULTS Fifty CN older adults were included. Among them, 38 individuals were included in the Aβ deposition negative (AN) group and 12 were included in the Aβ deposition positive (AP) group. The DDT1 scores of both the better and worse ears were significantly lower in the AP group than in the AN group (p = .008 and p = .015, respectively). No significant differences were observed between the groups in tests of the peripheral auditory pathways. In multivariable logistic regression analysis adjusted for apolipoprotein E4 positivity, the DDT1 better ear score predicted the AP group (p = .036, odds ratio = 0.892, 95% confidence interval: 0.780-0.985) with relatively high diagnostic accuracy. CONCLUSION Our findings suggest that Aβ deposition may affect the central auditory pathway even before cognitive decline appears. DDT1, which can easily be applied to the old-age population, may have the potential as a screening tool for preclinical AD.
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Affiliation(s)
- Min Soo Byun
- Department of Psychiatry, Seoul National University College of Medicine, Seoul, South Korea
- Department of Neuropsychiatry, Seoul National University Hospital, Seoul, South Korea
| | - Munyoung Chang
- Department of Otolaryngology–Head and Neck Surgery, Chung-Ang University College of Medicine, Seoul, South Korea
- Department of Otolaryngology–Head and Neck Surgery, Chung-Ang University Hospital, Seoul, South Korea
| | - Dahyun Yi
- Institute of Human Behavioral Medicine, Medical Research Centre, Seoul National University, Seoul, South Korea
| | - Hyejin Ahn
- Interdisciplinary Program of Cognitive Science, Seoul National University College of Humanities, Seoul, South Korea
| | - Dongkyun Han
- Department of Psychiatry, Seoul National University College of Medicine, Seoul, South Korea
- Department of Neuropsychiatry, Seoul National University Hospital, Seoul, South Korea
| | - Seulki Jeon
- Department of Otolaryngology–Head and Neck Surgery, Seoul National University Hospital, Seoul, South Korea
| | - Hyunsook Jang
- Division of Speech Pathology and Audiology, Research Institute of Audiology & Speech Pathology, Hallym University, Chuncheon-si, Gangwon-do, South Korea
| | - Dong Young Lee
- Department of Psychiatry, Seoul National University College of Medicine, Seoul, South Korea
- Department of Neuropsychiatry, Seoul National University Hospital, Seoul, South Korea
- Institute of Human Behavioral Medicine, Medical Research Centre, Seoul National University, Seoul, South Korea
| | - Seung Ha Oh
- Department of Otolaryngology–Head and Neck Surgery, Seoul National University Hospital, Seoul, South Korea
- Department of Otolaryngology–Head and Neck Surgery, Seoul National University College of Medicine, Seoul, South Korea
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11
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Vandersteen C, Plonka A, Manera V, Sawchuk K, Lafontaine C, Galery K, Rouaud O, Bengaied N, Launay C, Guérin O, Robert P, Allali G, Beauchet O, Gros A. Alzheimer's early detection in post-acute COVID-19 syndrome: a systematic review and expert consensus on preclinical assessments. Front Aging Neurosci 2023; 15:1206123. [PMID: 37416323 PMCID: PMC10320294 DOI: 10.3389/fnagi.2023.1206123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 05/31/2023] [Indexed: 07/08/2023] Open
Abstract
Introduction The risk of developing Alzheimer's disease (AD) in older adults increasingly is being discussed in the literature on Post-Acute COVID-19 Syndrome (PACS). Remote digital Assessments for Preclinical AD (RAPAs) are becoming more important in screening for early AD, and should always be available for PACS patients, especially for patients at risk of AD. This systematic review examines the potential for using RAPA to identify impairments in PACS patients, scrutinizes the supporting evidence, and describes the recommendations of experts regarding their use. Methods We conducted a thorough search using the PubMed and Embase databases. Systematic reviews (with or without meta-analysis), narrative reviews, and observational studies that assessed patients with PACS on specific RAPAs were included. The RAPAs that were identified looked for impairments in olfactory, eye-tracking, graphical, speech and language, central auditory, or spatial navigation abilities. The recommendations' final grades were determined by evaluating the strength of the evidence and by having a consensus discussion about the results of the Delphi rounds among an international Delphi consensus panel called IMPACT, sponsored by the French National Research Agency. The consensus panel included 11 international experts from France, Switzerland, and Canada. Results Based on the available evidence, olfaction is the most long-lasting impairment found in PACS patients. However, while olfaction is the most prevalent impairment, expert consensus statements recommend that AD olfactory screening should not be used on patients with a history of PACS at this point in time. Experts recommend that olfactory screenings can only be recommended once those under study have reported full recovery. This is particularly important for the deployment of the olfactory identification subdimension. The expert assessment that more long-term studies are needed after a period of full recovery, suggests that this consensus statement requires an update in a few years. Conclusion Based on available evidence, olfaction could be long-lasting in PACS patients. However, according to expert consensus statements, AD olfactory screening is not recommended for patients with a history of PACS until complete recovery has been confirmed in the literature, particularly for the identification sub-dimension. This consensus statement may require an update in a few years.
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Affiliation(s)
- Clair Vandersteen
- Institut Universitaire de la Face et du Cou, ENT Department, Centre Hospitalier Universitaire, Nice, France
- Laboratoire CoBTeK, Université Côte d'Azur, Nice, France
| | - Alexandra Plonka
- Laboratoire CoBTeK, Université Côte d'Azur, Nice, France
- Centre Hospitalier Universitaire de Nice, Service Clinique Gériatrique du Cerveau et du Mouvement, Nice, France
- Département d'Orthophonie, UFR Médecine, Université Côte d'Azur, Nice, France
- Institut NeuroMod, Université Côte d'Azur, Sophia Antipolis, France
| | - Valeria Manera
- Laboratoire CoBTeK, Université Côte d'Azur, Nice, France
- Département d'Orthophonie, UFR Médecine, Université Côte d'Azur, Nice, France
- Institut NeuroMod, Université Côte d'Azur, Sophia Antipolis, France
| | - Kim Sawchuk
- ACTLab, engAGE: Centre for Research on Aging, Concordia University Montreal, Montreal, QC, Canada
| | - Constance Lafontaine
- ACTLab, engAGE: Centre for Research on Aging, Concordia University Montreal, Montreal, QC, Canada
| | - Kevin Galery
- Research Centre of the Geriatric University Institute of Montreal, Montreal, QC, Canada
| | - Olivier Rouaud
- Leenaards Memory Center, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Nouha Bengaied
- Federation of Quebec Alzheimer Societies, Montreal, QC, Canada
| | - Cyrille Launay
- Mc Gill University Jewish General Hospital, Montreal, QC, Canada
| | - Olivier Guérin
- Centre Hospitalier Universitaire de Nice, Service Clinique Gériatrique du Cerveau et du Mouvement, Nice, France
- Université Côte d'Azur, CNRS UMR 7284/INSERM U108, Institute for Research on Cancer and Aging Nice, UFR de Médecine, Nice, France
| | - Philippe Robert
- Laboratoire CoBTeK, Université Côte d'Azur, Nice, France
- Centre Hospitalier Universitaire de Nice, Service Clinique Gériatrique du Cerveau et du Mouvement, Nice, France
- Département d'Orthophonie, UFR Médecine, Université Côte d'Azur, Nice, France
| | - Gilles Allali
- Leenaards Memory Center, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Olivier Beauchet
- Research Centre of the Geriatric University Institute of Montreal, Montreal, QC, Canada
- Mc Gill University Jewish General Hospital, Montreal, QC, Canada
- Departments of Medicine and Geriatric, University of Montreal, Montreal, QC, Canada
| | - Auriane Gros
- Laboratoire CoBTeK, Université Côte d'Azur, Nice, France
- Centre Hospitalier Universitaire de Nice, Service Clinique Gériatrique du Cerveau et du Mouvement, Nice, France
- Département d'Orthophonie, UFR Médecine, Université Côte d'Azur, Nice, France
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12
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Großmann W. Listening with an Ageing Brain - a Cognitive Challenge. Laryngorhinootologie 2023; 102:S12-S34. [PMID: 37130528 PMCID: PMC10184676 DOI: 10.1055/a-1973-3038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Hearing impairment has been recently identified as a major modifiable risk factor for cognitive decline in later life and has been becoming of increasing scientific interest. Sensory and cognitive decline are connected by complex bottom-up and top-down processes, a sharp distinction between sensation, perception, and cognition is impossible. This review provides a comprehensive overview on the effects of healthy and pathological aging on auditory as well as cognitive functioning on speech perception and comprehension, as well as specific auditory deficits in the 2 most common neurodegenerative diseases in old age: Alzheimer disease and Parkinson syndrome. Hypotheses linking hearing loss to cognitive decline are discussed, and current knowledge on the effect of hearing rehabilitation on cognitive functioning is presented. This article provides an overview of the complex relationship between hearing and cognition in old age.
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Affiliation(s)
- Wilma Großmann
- Universitätsmedizin Rostock, Klinik und Poliklinik für Hals-Nasen-Ohrenheilkunde,Kopf- und Halschirurgie "Otto Körner"
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13
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Li R, Miao X, Han B, Li J. Cortical thickness of the left parahippocampal cortex links central hearing and cognitive performance in aging. Ann N Y Acad Sci 2023; 1522:117-125. [PMID: 36799333 DOI: 10.1111/nyas.14971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
Hearing impairment is considered a leading modifiable risk factor of cognitive decline and dementia. While most evidence has been established on clinical assessment of peripheral hearing loss, understanding of how central hearing in real-world conditions is associated with cognitive aging is limited. This study analyzed the data of 473 unrelated healthy adults aged 36-100 years old from the Lifespan Human Connectome Project in Aging. Central hearing was evaluated using the Words-in-Noise decibel threshold. Cognitive functions were evaluated by the performance on cognitive tests, and cortical thickness was estimated from magnetic resonance imaging (MRI) data. Here, we show that a higher hearing threshold was associated with a lower performance on immediate and delayed episodic memory retrieval, switching aspect of executive function, working memory, reading decoding, and vocabulary comprehension. Cortical thickness in the left parahippocampal cortex (lPHC) was negatively associated with the hearing threshold and acted as a significant partial mediator in the association of central hearing with immediate recall, switching, reading decoding, and vocabulary comprehension. These findings suggest that cortical thickness in the lPHC, an early target of dementia, partially links central hearing and performance in multiple cognitive domains in aging.
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Affiliation(s)
- Rui Li
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China.,Department of Psychology, University of Chinese Academy of Sciences, Beijing, China
| | - Xiaoyan Miao
- Department of Psychology and Special Education Research, National Institute of Education Sciences, Beijing, China
| | - Buxin Han
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China.,Department of Psychology, University of Chinese Academy of Sciences, Beijing, China
| | - Juan Li
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China.,Department of Psychology, University of Chinese Academy of Sciences, Beijing, China
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14
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Wang HF, Zhang W, Rolls ET, Li Y, Wang L, Ma YH, Kang J, Feng J, Yu JT, Cheng W. Hearing impairment is associated with cognitive decline, brain atrophy and tau pathology. EBioMedicine 2022; 86:104336. [PMID: 36356475 PMCID: PMC9649369 DOI: 10.1016/j.ebiom.2022.104336] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 10/01/2022] [Accepted: 10/17/2022] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Hearing impairment was recently identified as the most prominent risk factor for dementia. However, the mechanisms underlying the link between hearing impairment and dementia are still unclear. METHODS We investigated the association of hearing performance with cognitive function, brain structure and cerebrospinal fluid (CSF) proteins in cross-sectional, longitudinal, mediation and genetic association analyses across the UK Biobank (N = 165,550), the Chinese Alzheimer's Biomarker and Lifestyle (CABLE, N = 863) study, and the Alzheimer's Disease Neuroimaging Initiative (ADNI, N = 1770) database. FINDINGS Poor hearing performance was associated with worse cognitive function in the UK Biobank and in the CABLE study. Hearing impairment was significantly related to lower volume of temporal cortex, hippocampus, inferior parietal lobe, precuneus, etc., and to lower integrity of white matter (WM) tracts. Furthermore, a higher polygenic risk score (PRS) for hearing impairment was strongly associated with lower cognitive function, lower volume of gray matter, and lower integrity of WM tracts. Moreover, hearing impairment was correlated with a high level of CSF tau protein in the CABLE study and in the ADNI database. Finally, mediation analyses showed that brain atrophy and tau pathology partly mediated the association between hearing impairment and cognitive decline. INTERPRETATION Hearing impairment is associated with cognitive decline, brain atrophy and tau pathology, and hearing impairment may reflect the risk for cognitive decline and dementia as it is related to bran atrophy and tau accumulation in brain. However, it is necessary to assess the mechanism in future animal studies. FUNDING A full list of funding bodies that supported this study can be found in the Acknowledgements section.
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Affiliation(s)
- Hui-Fu Wang
- Department of Neurology, Huashan Hospital, Institute of Science and Technology for Brain-Inspired Intelligence, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University, Shanghai, China; Department of Neurology, Qingdao Municipal Hospital, Qingdao University, Qingdao, China
| | - Wei Zhang
- Department of Neurology, Huashan Hospital, Institute of Science and Technology for Brain-Inspired Intelligence, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University, Shanghai, China
| | - Edmund T Rolls
- Department of Neurology, Huashan Hospital, Institute of Science and Technology for Brain-Inspired Intelligence, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University, Shanghai, China; Department of Computer Science, University of Warwick, Coventry, CV4 7AL, UK; Oxford Centre for Computational Neuroscience, Oxford, UK
| | | | - Yuzhu Li
- Department of Neurology, Huashan Hospital, Institute of Science and Technology for Brain-Inspired Intelligence, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University, Shanghai, China
| | - Linbo Wang
- Department of Neurology, Huashan Hospital, Institute of Science and Technology for Brain-Inspired Intelligence, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University, Shanghai, China
| | - Ya-Hui Ma
- Department of Neurology, Qingdao Municipal Hospital, Qingdao University, Qingdao, China
| | - Jujiao Kang
- Department of Neurology, Huashan Hospital, Institute of Science and Technology for Brain-Inspired Intelligence, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University, Shanghai, China
| | - Jianfeng Feng
- Department of Neurology, Huashan Hospital, Institute of Science and Technology for Brain-Inspired Intelligence, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University, Shanghai, China; Key Laboratory of Computational Neuroscience and Brain-Inspired Intelligence (Fudan University), Ministry of Education, China; Zhangjiang Fudan International Innovation Center, Shanghai, China; Fudan ISTBI-ZJNU Algorithm Centre for Brain-inspired Intelligence, Zhejiang Normal University, Zhejiang, China
| | - Jin-Tai Yu
- Department of Neurology, Huashan Hospital, Institute of Science and Technology for Brain-Inspired Intelligence, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University, Shanghai, China.
| | - Wei Cheng
- Department of Neurology, Huashan Hospital, Institute of Science and Technology for Brain-Inspired Intelligence, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University, Shanghai, China; Key Laboratory of Computational Neuroscience and Brain-Inspired Intelligence (Fudan University), Ministry of Education, China; Fudan ISTBI-ZJNU Algorithm Centre for Brain-inspired Intelligence, Zhejiang Normal University, Zhejiang, China.
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