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Li X, Yao C, Lan D, Chen Y, Wang Y, Qi S. Porphyromonas gingivalis promote microglia M1 polarization through the NF-кB signaling pathway. Heliyon 2024; 10:e35340. [PMID: 39170188 PMCID: PMC11336649 DOI: 10.1016/j.heliyon.2024.e35340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 06/24/2024] [Accepted: 07/26/2024] [Indexed: 08/23/2024] Open
Abstract
Background Porphyromonas gingivalis (P.gingivalis) is associated with the onset of Alzheimer's disease (AD), but the underlying molecular mechanism is unclear. Neuroinflammation in the brain from the microglial immune response induces the pathological progression of AD. In this study, the roles and molecular mechanism of P.gingivalis in microglial inflammation in vitro were investigated. Methods In this study, a P.gingivalis oral administration mouse model was generated, and microglia were stimulated with P.gingivalis in vitro. The viability of the microglia after P.gingivalis treatment was evaluated through CCK-8 and live/dead cell staining. Inflammation in brain tissue after P.gingivalis treatment and the immune response of microglia in vitro were detected by RT‒PCR, Western blotting and IF. Moreover, the RNA sequence was used, and the role of the NF-κB signalling pathway in microglial activation was analysed after P.gingivalis stimulation. Results The mRNA and protein levels of IL-6 and IL-17 were increased, and the expression of IL-10 was decreased in brain tissue after P.gingivalis oral administration. The viability of the HMC3 cells significantly decreased with 5% P.gingivalis after stimulation. The results of live/dead cell staining also showed the inhibitory effect of 5% P.gingivalis supplementation on cell viability. Moreover, 5% P.gingivalis supplementation increased the mRNA and protein levels of IL-6 and IL-17 and decreased IL-10 expression in HMC3 cells. P.gingivalis supplementation increased the mRNA and protein levels of iNOS and CD86 and decreased CD206 expression in HMC3 cells. RNA sequencing revealed that the NF-κB signalling pathway was involved in this process. Furthermore, p-P65 was upregulated and p-IKBα was downregulated in brain tissue and HMC3 cells after P.gingivalis stimulation, and an NF-κB signalling pathway inhibitor (QNZ) reversed the viability, M1 polarization and inflammatory factors of microglia in HMC3 cells in vitro. Conclusions In conclusion, P.gingivalis induced neuroinflammation in the brain, possibly through promotion of M1 polarization of microglia via activation of the NF-κB signalling pathway during the progression of AD.
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Affiliation(s)
- Xue Li
- Department of Oral Prosthodontics, Shanghai Stomatological Hospital, Fudan University, Shanghai, 200001, China
- Shanghai Key Laboratory of Craniomaxillofacial Development and Diseases, Fudan University, Shanghai, 200002, China
- Medical College, Anhui University of Science and Technology, Huainan, 232001, China
| | - Chao Yao
- Shanghai Key Laboratory of Craniomaxillofacial Development and Diseases, Fudan University, Shanghai, 200002, China
| | - Dongmei Lan
- Shanghai Key Laboratory of Craniomaxillofacial Development and Diseases, Fudan University, Shanghai, 200002, China
| | - Yurong Chen
- Department of Oral Prosthodontics, Shanghai Stomatological Hospital, Fudan University, Shanghai, 200001, China
- Shanghai Key Laboratory of Craniomaxillofacial Development and Diseases, Fudan University, Shanghai, 200002, China
- Medical College, Anhui University of Science and Technology, Huainan, 232001, China
| | - Yan Wang
- Shanghai Key Laboratory of Craniomaxillofacial Development and Diseases, Fudan University, Shanghai, 200002, China
- Medical College, Anhui University of Science and Technology, Huainan, 232001, China
- Department of Preventive Dentistry, Shanghai Stomatological Hospital, Fudan University, Shanghai, 200000, China
| | - Shengcai Qi
- Department of Oral Prosthodontics, Shanghai Stomatological Hospital, Fudan University, Shanghai, 200001, China
- Shanghai Key Laboratory of Craniomaxillofacial Development and Diseases, Fudan University, Shanghai, 200002, China
- Medical College, Anhui University of Science and Technology, Huainan, 232001, China
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2
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Zhu Y, Guo X, Li S, Wu Y, Zhu F, Qin C, Zhang Q, Yang Y. Naringenin ameliorates amyloid-β pathology and neuroinflammation in Alzheimer's disease. Commun Biol 2024; 7:912. [PMID: 39069528 DOI: 10.1038/s42003-024-06615-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Accepted: 07/22/2024] [Indexed: 07/30/2024] Open
Abstract
Alzheimer's disease (AD) is the most common cause of dementia characterized by amyloid-β (Aβ) deposition, tau hyperphosphorylation, and neuroinflammation. Naringenin (NRG), a natural flavonoid widely present in citrus fruits, has been reported can penetrate the blood-brain barrier and exert anti-inflammatory effects in the central nervous system. Here, we investigate the protective effects of long-term NRG treatment on AD. The novel object recognition test and Morris water maze test reveal that NRG treatment can improve the learning and memory ability of APP/PS1 mice. Besides, we find that NRG can significantly reduce Aβ deposition, microglial and astrocytic activation, and pro-inflammatory cytokine levels in APP/PS1 mice. Results further show that NRG effectively decreases pro-inflammatory cytokines in LPS/Aβ-stimulated BV2 cells. Lastly, the molecular mechanistic study reveals that NRG attenuates neuroinflammatory responses via inhibition of the MAPK signaling pathway in vivo and in vitro. Overall, NRG may emerge as a promising compound for the prevention and treatment of AD.
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Affiliation(s)
- Yueli Zhu
- Department of Geriatrics, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, Zhejiang, China
- Key Laboratory of Diagnosis and Treatment of Aging and Physic-chemical Injury Diseases of Zhejiang Province, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Xiaoming Guo
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, Zhejiang, China
| | - Shumin Li
- Department of Geriatrics, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, Zhejiang, China
- Key Laboratory of Diagnosis and Treatment of Aging and Physic-chemical Injury Diseases of Zhejiang Province, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Yue Wu
- Department of Geriatrics, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, Zhejiang, China
- Key Laboratory of Diagnosis and Treatment of Aging and Physic-chemical Injury Diseases of Zhejiang Province, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Feng Zhu
- Department of Geriatrics, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, Zhejiang, China
- Key Laboratory of Diagnosis and Treatment of Aging and Physic-chemical Injury Diseases of Zhejiang Province, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Chengfan Qin
- Department of Geriatrics, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, Zhejiang, China
- Key Laboratory of Diagnosis and Treatment of Aging and Physic-chemical Injury Diseases of Zhejiang Province, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Qin Zhang
- Department of Geriatrics, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, Zhejiang, China.
- Key Laboratory of Diagnosis and Treatment of Aging and Physic-chemical Injury Diseases of Zhejiang Province, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China.
| | - Yunmei Yang
- Department of Geriatrics, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, Zhejiang, China.
- Key Laboratory of Diagnosis and Treatment of Aging and Physic-chemical Injury Diseases of Zhejiang Province, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China.
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3
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Sampatakakis SN, Mourtzi N, Charisis S, Mamalaki E, Ntanasi E, Hatzimanolis A, Ramirez A, Lambert JC, Yannakoulia M, Kosmidis MH, Dardiotis E, Hadjigeorgiou G, Megalou M, Sakka P, Scarmeas N. Walking time and genetic predisposition for Alzheimer's disease: Results from the HELIAD study. Clin Neuropsychol 2024:1-17. [PMID: 38741352 DOI: 10.1080/13854046.2024.2344869] [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: 12/12/2023] [Accepted: 04/15/2024] [Indexed: 05/16/2024]
Abstract
Objective: Our study aimed to explore whether physical condition might affect the association between genetic predisposition for Alzheimer's Disease (AD) and AD incidence. Methods: The sample of participants consisted of 561 community-dwelling adults over 64 years old, without baseline dementia (508 cognitively normal and 53 with mild cognitive impairment), deriving from the HELIAD, an ongoing longitudinal study with follow-up evaluations every 3 years. Physical condition was assessed at baseline through walking time (WT), while a Polygenic Risk Score for late onset AD (PRS-AD) was used to estimate genetic predisposition. The association between WT and PRS-AD with AD incidence was evaluated with Cox proportional hazard models adjusted for age, sex, education years, global cognition score and APOE ε-4 genotype. Then, the association between WT and AD incidence was investigated after stratifying participants by low and high PRS-AD. Finally, we examined the association between PRS-AD and AD incidence after stratifying participants by WT. Results: Both WT and PRS-AD were connected with increased AD incidence (p < 0.05), after adjustments. In stratified analyses, in the slow WT group participants with a greater genetic risk had a 2.5-fold higher risk of developing AD compared to participants with lower genetic risk (p = 0.047). No association was observed in the fast WT group or when participants were stratified based on PRS-AD. Conclusions: Genetic predisposition for AD is more closely related to AD incidence in the group of older adults with slow WT. Hence, physical condition might be a modifier in the relationship of genetic predisposition with AD incidence.
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Affiliation(s)
- Stefanos N Sampatakakis
- 1st Department of Neurology, Aiginition Hospital, National and Kapodistrian University of Athens Medical School, Athens, Greece
| | - Niki Mourtzi
- 1st Department of Neurology, Aiginition Hospital, National and Kapodistrian University of Athens Medical School, Athens, Greece
| | - Sokratis Charisis
- Department of Neurology, UT Health San Antonio, San Antonio, TX, USA
| | - Eirini Mamalaki
- 1st Department of Neurology, Aiginition Hospital, National and Kapodistrian University of Athens Medical School, Athens, Greece
| | - Eva Ntanasi
- 1st Department of Neurology, Aiginition Hospital, National and Kapodistrian University of Athens Medical School, Athens, Greece
| | - Alex Hatzimanolis
- Department of Psychiatry, National and Kapodistrian University of Athens Medical School, Aiginition Hospital, Athens, Greece
| | - Alfredo Ramirez
- Division of Neurogenetics and Molecular Psychiatry, Department of Psychiatry and Psychotherapy, Medical Faculty, University of Cologne, Cologne, Germany
- Department of Neurodegenerative Diseases and Geriatric Psychiatry, University Hospital Bonn, Bonn, Germany
- German Center for Neurodegenerative Diseases (DZNE Bonn), Bonn, Germany
- Department of Psychiatry, Glenn Biggs Institute for Alzheimer's and Neurodegenerative Diseases, San Antonio, TX, USA
- Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Jean-Charles Lambert
- U1167-RID-AGE facteurs de risque et déterminants moléculaires des maladies liés au vieillissement, Univ. Lille, Inserm, CHU Lille, Institut Pasteur de Lille, Lille, France
| | - Mary Yannakoulia
- Department of Nutrition and Dietetics, Harokopio University, Athens, Greece
| | - Mary H Kosmidis
- Lab of Cognitive Neuroscience, School of Psychology, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Efthimios Dardiotis
- Department of Neurology, Faculty of Medicine, School of Health Sciences, University Hospital of Larissa, University of Thessaly, Larissa, Greece
| | | | | | - Paraskevi Sakka
- Athens Association of Alzheimer's Disease and Related Disorders, Marousi, Greece
| | - Nikolaos Scarmeas
- 1st Department of Neurology, Aiginition Hospital, National and Kapodistrian University of Athens Medical School, Athens, Greece
- Department of Neurology, The Gertrude H. Sergievsky Center, Taub Institute for Research in Alzheimer's Disease and the Aging Brain, Columbia University, New York, NY, USA
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Singh S, Ahuja A, Pathak S. Potential Role of Oxidative Stress in the Pathophysiology of Neurodegenerative Disorders. Comb Chem High Throughput Screen 2024; 27:2043-2061. [PMID: 38243956 DOI: 10.2174/0113862073280680240101065732] [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: 09/21/2023] [Revised: 11/27/2023] [Accepted: 12/14/2023] [Indexed: 01/22/2024]
Abstract
Neurodegeneration causes premature death in the peripheral and central nervous system. Neurodegeneration leads to the accumulation of oxidative stress, inflammatory responses, and the generation of free radicals responsible for nervous disorders like amyotrophic lateral sclerosis, Alzheimer's disease, Parkinson's disease, and Huntington's disorders. Therefore, focus must be diverted towards treating and managing these disorders, as it is very challenging. Furthermore, effective therapies are also lacking, so the growing interest of the global market must be inclined towards developing newer therapeutic approaches that can intercept the progression of neurodegeneration. Emerging evidences of research findings suggest that antioxidant therapy has significant potential in modulating disease phenotypes. This makes them promising candidates for further investigation. This review focuses on the role of oxidative stress and reactive oxygen species in the pathological mechanisms of various neurodegenerative diseases, amyotrophic lateral sclerosis, Alzheimer's disease, Parkinson's disease, and Huntington's disorders and their neuroprotection. Additionally, it highlights the potential of antioxidant-based therapeutics in mitigating disease severity in humans and improving patient compliance. Ongoing extensive global research further sheds light on exploring new therapeutic targets for a deeper understanding of disease mechanisms in the field of medicine and biology targeting neurogenerative disorders.
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Affiliation(s)
- Sonia Singh
- Institute of Pharmaceutical Research, GLA University Mathura, U.P, 281406, India
| | - Ashima Ahuja
- Institute of Pharmaceutical Research, GLA University Mathura, U.P, 281406, India
| | - Shilpi Pathak
- Institute of Pharmaceutical Research, GLA University Mathura, U.P, 281406, India
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5
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Maggio MG, De Domenico C, Manuli A, Latella D, Marra A, La Rosa G, Portaro S, Calabrò RS. Alzheimer cafè: toward bridging the gap between cure and care in patients with dementia. Int J Neurosci 2023; 133:1024-1030. [PMID: 35184665 DOI: 10.1080/00207454.2022.2040024] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 01/10/2022] [Accepted: 01/30/2022] [Indexed: 10/19/2022]
Abstract
BACKGROUND Alzheimer's disease (AD) is the most common form of degenerative dementia, whose symptoms usually appear in the pre-senile age. In the early stages, patients present social difficulties due to the general cognitive decline in memory, language and executive domains. These problems also affect patients' quality of life, emotions, and mood, leading to social isolation. OBJECTIVE The aim of this study is to evaluate the effects of Alzheimer's Cafè (AC) on the cognitive and behavioral outcomes of AD patients. METHODS Twenty patients diagnosed with AD, who attended the Cognitive and Behavioral Rehabilitation Laboratory of the IRCCS Centro Neurolesi 'Bonino-Pulejo' of Messina, Italy, from December 2017 to December 2018, were enrolled in this study. As these patients belonged to the experimental group (EG: n = 20), they received specific cognitive-behavior training using the AC modality. The patients were assessed by a neuropsychological evaluation at the beginning and at the end of the program. Their outcomes were compared to a matched group of patients with neurodegenerative dementia (CG: 20) receiving conventional cognitive training. RESULTS The pre-post comparisons showed that both CG and EG had a significant improvement in global cognitive functioning (MoCA p < 0.001) and in perceived quality of life (<0.001). However, only in the EG, we observed a significant increase in social functioning (SASS p < 0.00), the perception of mental well-being (SF-12 Mental p < 0.00), and a reduction in the depressive state (GDS p < 0.00). CONCLUSIONS The present study suggests the importance of AC for patients with AD and the potential effect on psychological and social well-being.
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Affiliation(s)
| | | | | | | | - Angela Marra
- IRCCS Centro Neurolesi 'Bonino Pulejo', Messina, Italy
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6
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Sharma S, Hale JM, Myrskylä M, Kulu H. Racial, Ethnic, Nativity, and Educational Disparities in Cognitive Impairment and Activity Limitations in the United States, 1998-2016. Demography 2023; 60:1441-1468. [PMID: 37638648 DOI: 10.1215/00703370-10941414] [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] [Indexed: 08/29/2023]
Abstract
Despite extensive research on cognitive impairment and limitations in basic activities of daily living, no study has investigated the burden of their co-occurrence (co-impairment). Using the Health and Retirement Study data and incidence-based multistate models, we study the population burden of co-impairment using three key indicators: mean age at onset, lifetime risk, and health expectancy. We examine patterns by gender, race, ethnicity, nativity, education, and their interactions for U.S. residents aged 50-100. Furthermore, we analyze what fractions of racial, ethnic, and nativity disparities in co-impairment are attributable to inequalities in educational attainment. Results reveal that an estimated 56% of women and 41% of men aged 50 will experience co-impairment in their remaining life expectancy. Men experience an earlier onset of co-impairment than women (74 vs. 77 years), and women live longer in co-impairment than men (3.4 vs. 1.9 years). Individuals who are Black, Latinx, and lower educated, especially those experiencing intersecting disadvantages, have substantially higher lifetime risk of co-impairment, earlier co-impairment onset, and longer life in co-impairment than their counterparts. Up to 75% of racial, ethnic, and nativity disparity is attributable to inequality in educational attainment. This study provides novel insights into the burden of co-impairment and offers evidence of dramatic disparities in the older U.S. population.
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Affiliation(s)
- Shubhankar Sharma
- Max Planck Institute for Demographic Research, Rostock, Germany
- University of St Andrews, St Andrews, Scotland
- University of Helsinki, Helsinki, Finland
- Max Planck-University of Helsinki Center for Social Inequalities in Population Health, Helsinki, Finland, and Rostock, Germany
| | - Jo Mhairi Hale
- University of St Andrews, St Andrews, Scotland
- Max Planck Institute for Demographic Research, Rostock, Germany
| | - Mikko Myrskylä
- Max Planck Institute for Demographic Research, Rostock, Germany
- University of Helsinki, Helsinki, Finland
- Max Planck-University of Helsinki Center for Social Inequalities in Population Health, Helsinki, Finland, and Rostock, Germany
| | - Hill Kulu
- University of St Andrews, St Andrews, Scotland
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7
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Chen XL, Fortes JM, Hu YT, van Iersel J, He KN, van Heerikhuize J, Balesar R, Swaab D, Bao AM. Sexually dimorphic age-related molecular differences in the entorhinal cortex of cognitively intact elderly: Relation to early Alzheimer's changes. Alzheimers Dement 2023; 19:3848-3857. [PMID: 36960685 DOI: 10.1002/alz.13037] [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: 10/18/2022] [Revised: 12/21/2022] [Accepted: 12/27/2022] [Indexed: 03/25/2023]
Abstract
INTRODUCTION Women are more vulnerable to Alzheimer's disease (AD) than men. The entorhinal cortex (EC) is one of the earliest structures affected in AD. We identified in cognitively intact elderly different molecular changes in the EC in relation to age. METHODS Changes in 12 characteristic molecules in relation to age were determined by quantitative immunohistochemistry or in situ hybridization in the EC. They were arbitrarily grouped into sex steroid-related molecules, markers of neuronal activity, neurotransmitter-related molecules, and cholinergic activity-related molecules. RESULTS The changes in molecules indicated increasing local estrogenic and neuronal activity accompanied by a higher and faster hyperphosphorylated tau accumulation in women's EC in relation to age, versus a mainly stable local estrogenic/androgenic and neuronal activity in men's EC. DISCUSSION EC employs a different neurobiological strategy in women and men to maintain cognitive function, which seems to be accompanied by an earlier start of AD in women. HIGHLIGHTS Local estrogen system is activated with age only in women's entorhinal cortex (EC). EC neuronal activity increased with age only in elderly women with intact cognition. Men and women have different molecular strategies to retain cognition with aging. P-tau accumulation in the EC was higher and faster in cognitively intact elderly women.
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Affiliation(s)
- Xin-Lu Chen
- Department of Neurobiology and Department of Neurology of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain Research and Brain-Machine Integration, School of Brain Science and Brain Medicine, Zhejiang University, Hangzhou, China
| | - Jennifer Monteiro Fortes
- Netherlands Institute for Neuroscience, An Institute of the Royal Netherlands Academy of Arts and Sciences, Amsterdam, The Netherlands
| | - Yu-Ting Hu
- Department of Neurobiology and Department of Neurology of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain Research and Brain-Machine Integration, School of Brain Science and Brain Medicine, Zhejiang University, Hangzhou, China
| | - Juliet van Iersel
- Netherlands Institute for Neuroscience, An Institute of the Royal Netherlands Academy of Arts and Sciences, Amsterdam, The Netherlands
| | - Kang-Ning He
- Department of Neurobiology and Department of Neurology of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain Research and Brain-Machine Integration, School of Brain Science and Brain Medicine, Zhejiang University, Hangzhou, China
| | - Joop van Heerikhuize
- Netherlands Institute for Neuroscience, An Institute of the Royal Netherlands Academy of Arts and Sciences, Amsterdam, The Netherlands
| | - Rawien Balesar
- Netherlands Institute for Neuroscience, An Institute of the Royal Netherlands Academy of Arts and Sciences, Amsterdam, The Netherlands
| | - Dick Swaab
- NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain Research and Brain-Machine Integration, School of Brain Science and Brain Medicine, Zhejiang University, Hangzhou, China
- Netherlands Institute for Neuroscience, An Institute of the Royal Netherlands Academy of Arts and Sciences, Amsterdam, The Netherlands
| | - Ai-Min Bao
- Department of Neurobiology and Department of Neurology of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain Research and Brain-Machine Integration, School of Brain Science and Brain Medicine, Zhejiang University, Hangzhou, China
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Aguree S, Zolnoori M, Atwood TP, Owora A. Association between choline supplementation and Alzheimer's disease risk: a systematic review protocol. Front Aging Neurosci 2023; 15:1242853. [PMID: 37700814 PMCID: PMC10493398 DOI: 10.3389/fnagi.2023.1242853] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 08/15/2023] [Indexed: 09/14/2023] Open
Abstract
Background and aims There is growing evidence suggesting choline intake might have beneficial effects on cognitive function in the elderly. However, some studies report no relationship between choline intake and cognitive function or improvement in Alzheimer's disease patients. This protocol is for a systematic review of choline intake and Alzheimer's disease that aims to assess the comparative clinical effectiveness of choline supplementation on Alzheimer's disease risk. Methods and analysis literature search will be performed in PubMed, MEDLINE, EMBASE, CINAHL, Scopus, Cochrane, and the Web of Science electronic databases from inception until October 2023. We will follow the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Studies will be included if they compared two different time points of choline biomarkers measures in men or women (65+) with Alzheimer's Disease. The risk of bias in the included studies will be assessed within the Covidence data-management software. Results This review will summarize the clinical trial and quasi-experimental evidence of choline intake on Alzheimer's disease risk for adults aged 65+. The results from all eligible studies included in the analysis will be presented in tables, text, and figures. A descriptive synthesis will present the characteristics of included studies (e.g., age, sex of participants, type, length of intervention and comparator, and outcome measures), critical appraisal results, and descriptions of the main findings. Discussion This systematic review will summarize the existing evidence on the association between Choline intake and AD and to make recommendations if appropriate. The results of this review will be considered with respect to whether there is enough evidence of benefit to merit a more definitive randomized controlled trial. The results will be disseminated through peer-reviewed journals population. Conclusion This protocol outlines the methodology for a systematic review of choline intake and AD. The resulting systematic review from this protocol will form an evidence-based foundation to advance nutrition care for individuals with AD or poor cognitive function. Systematic review registration http://www.crd.york.ac.uk/PROSPERO, identifier CRD42023395004.
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Affiliation(s)
- Sixtus Aguree
- Department of Applied Health Science, School of Public Health, Indiana University Bloomington, Bloomington, IN, United States
| | - Maryam Zolnoori
- Columbia University Irving Medical Center, New York, NY, United States
| | - Thea Patricia Atwood
- Department of Chemistry, Indiana University Bloomington, Bloomington, IN, United States
| | - Arthur Owora
- Department of Pediatrics, School of Medicine, Indiana University, Indianapolis, IN, United States
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9
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Lin L, Xiong M, Zhang G, Kang W, Sun S, Wu S. A Convolutional Neural Network and Graph Convolutional Network Based Framework for AD Classification. SENSORS (BASEL, SWITZERLAND) 2023; 23:1914. [PMID: 36850510 PMCID: PMC9961367 DOI: 10.3390/s23041914] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 01/29/2023] [Accepted: 02/01/2023] [Indexed: 06/18/2023]
Abstract
The neuroscience community has developed many convolutional neural networks (CNNs) for the early detection of Alzheimer's disease (AD). Population graphs are thought of as non-linear structures that capture the relationships between individual subjects represented as nodes, which allows for the simultaneous integration of imaging and non-imaging information as well as individual subjects' features. Graph convolutional networks (GCNs) generalize convolution operations to accommodate non-Euclidean data and aid in the mining of topological information from the population graph for a disease classification task. However, few studies have examined how GCNs' input properties affect AD-staging performance. Therefore, we conducted three experiments in this work. Experiment 1 examined how the inclusion of demographic information in the edge-assigning function affects the classification of AD versus cognitive normal (CN). Experiment 2 was designed to examine the effects of adding various neuropsychological tests to the edge-assigning function on the mild cognitive impairment (MCI) classification. Experiment 3 studied the impact of the edge assignment function. The best result was obtained in Experiment 2 on multi-class classification (AD, MCI, and CN). We applied a novel framework for the diagnosis of AD that integrated CNNs and GCNs into a unified network, taking advantage of the excellent feature extraction capabilities of CNNs and population-graph processing capabilities of GCNs. To learn high-level anatomical features, DenseNet was used; a set of population graphs was represented with nodes defined by imaging features and edge weights determined by different combinations of imaging or/and non-imaging information, and the generated graphs were then fed to the GCNs for classification. Both binary classification and multi-class classification showed improved performance, with an accuracy of 91.6% for AD versus CN, 91.2% for AD versus MCI, 96.8% for MCI versus CN, and 89.4% for multi-class classification. The population graph's imaging features and edge-assigning functions can both significantly affect classification accuracy.
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Affiliation(s)
- Lan Lin
- Department of Biomedical Engineering, Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
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10
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Mullany S, Diaz-Torres S, Schmidt JM, Thomson D, Qassim A, Marshall HN, Knight LS, Berry EC, Kolovos A, Dimasi D, Lake S, Mills RA, Landers J, Mitchell P, Healey PR, Commerford T, Klebe S, Souzeau E, Hassall MM, MacGregor S, Gharahkhani P, Siggs OM, Craig JE. No Strong Association Between the Apolipoprotein E E4 Allele and Glaucoma: a Multicohort Study. OPHTHALMOLOGY SCIENCE 2023; 3:100287. [PMID: 37007646 PMCID: PMC10064233 DOI: 10.1016/j.xops.2023.100287] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 01/22/2023] [Accepted: 02/08/2023] [Indexed: 02/16/2023]
Abstract
Purpose To elucidate a potential association between the apolipoprotein E (APOE) E4 allele and glaucoma prevalence in large cohorts. Design A cross-sectional analysis of baseline and prospectively collected cohort data. Participants UK Biobank (UKBB) participants of genetically determined European ancestry (n = 438 711). Replication analyses were performed using clinical and genotyping data collected from European participants recruited to the Canadian Longitudinal Study of Aging (CLSA; n = 18 199), the Australian and New Zealand Registry of Advanced Glaucoma (ANZRAG; n = 1970), and the Blue Mountains Eye Study (BMES; n = 2440). Methods Apolipoprotein E alleles and genotypes were determined, and their distributions were compared on the basis of glaucoma status. Similar analyses were performed using positive control outcomes associated with the APOE E4 allele (death, dementia, age-related macular degeneration) and negative control outcomes not associated with the APOE E4 allele (cataract, diabetic eye disease). Outcome phenotypes were also correlated with Alzheimer's dementia (AD), a clinical outcome highly associated with the APOE E4 allele. Main Outcome Measures Results of APOE E4 genotype-phenotype comparisons were reported as odds ratios (ORs) with 95% confidence intervals (CIs). Replication analyses investigated APOE E4 associations in 2 replication cohorts (CLSA and ANZRAG/BMES). Results The APOE E4 allele was inversely associated with glaucoma (OR, 0.96; 95% CI, 0.93-0.99; P = 0.016) and both negative controls (cataract: OR, 0.98; 95% CI, 0.96-0.99; P = 0.015; diabetic eye disease: OR, 0.92; 95% CI, 0.87-0.97; P = 0.003) in the UKBB cohort. A paradoxical positive association was observed between AD and both glaucoma (OR, 1.30; 95% CI, 1.08-1.54; P < 0.01) and cataract (OR, 1.15; 1.04-1.28; P = 0.018). No association between the APOE E4 allele and glaucoma was observed in either replication cohort (CLSA: OR, 1.03; 95% CI, 0.89-1.19; P = 0.66; ANZRAG/BMES: OR, 0.97; 95% CI, 0.84-1.12; P = 0.65). Conclusions A small negative association observed between APOE E4 and glaucoma within the UKBB was not evident in either replication cohort and may represent an artifact of glaucoma underdiagnosis in APOE E4 carriers. Financial Disclosures The author(s) have no proprietary or commercial interest in any materials discussed in this article.
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Affiliation(s)
- Sean Mullany
- Department of Ophthalmology, Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia
- Correspondence: Sean Mullany, Department of Ophthalmology, Flinders Health and Medical Research Institute, Flinders University, Flinders Drive, Bedford Park, Adelaide, SA 5042.
| | - Santiago Diaz-Torres
- Department of Genetics and Computational Biology, QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
| | - Joshua M. Schmidt
- Department of Ophthalmology, Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia
| | - Daniel Thomson
- Department of Ophthalmology, Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia
| | - Ayub Qassim
- Department of Ophthalmology, Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia
| | - Henry N. Marshall
- Department of Ophthalmology, Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia
| | - Lachlan S.W. Knight
- Department of Ophthalmology, Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia
| | - Ella C. Berry
- Department of Ophthalmology, Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia
| | - Antonia Kolovos
- Department of Ophthalmology, Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia
| | - David Dimasi
- Department of Ophthalmology, Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia
| | - Stewart Lake
- Department of Ophthalmology, Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia
| | - Richard A. Mills
- Department of Ophthalmology, Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia
| | - John Landers
- Department of Ophthalmology, Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia
| | - Paul Mitchell
- Centre for Vision Research, University of Sydney, Sydney, Australia
| | - Paul R. Healey
- Centre for Vision Research, University of Sydney, Sydney, Australia
| | - Toby Commerford
- Department of Geriatric Medicine, Royal Adelaide Hospital, Adelaide, South Australia
| | - Sonja Klebe
- Department of Pathology, Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia
| | - Emmanuelle Souzeau
- Department of Ophthalmology, Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia
| | - Mark M. Hassall
- Department of Ophthalmology, Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia
| | - Stuart MacGregor
- Department of Genetics and Computational Biology, QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
| | - Puya Gharahkhani
- Department of Genetics and Computational Biology, QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
| | - Owen M. Siggs
- Department of Ophthalmology, Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia
- Garvan Institute of Medical Research, Darlinghurst, New South Wales
| | - Jamie E. Craig
- Department of Ophthalmology, Flinders Health and Medical Research Institute, Flinders University, Adelaide, South Australia
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Fu Y, Wang ZT, Huang LY, Tan CC, Cao XP, Tan L. Heart fatty acid-binding protein is associated with phosphorylated tau and longitudinal cognitive changes. Front Aging Neurosci 2022; 14:1008780. [PMID: 36299612 PMCID: PMC9588952 DOI: 10.3389/fnagi.2022.1008780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Accepted: 09/21/2022] [Indexed: 11/13/2022] Open
Abstract
BackgroundPerturbation of lipid metabolism is associated with Alzheimer’s disease (AD). Heart fatty acid-binding protein (HFABP) is an adipokine playing an important role in lipid metabolism regulation.Materials and methodsTwo datasets separately enrolled 303 and 197 participants. First, we examine the associations of cerebrospinal fluid (CSF) HFABP levels with cognitive measures [including Mini-Mental State Examination (MMSE), Clinical Dementia Rating sum of boxes (CDRSB), and the cognitive section of Alzheimer’s Disease Assessment Scale] and AD biomarkers (CSF amyloid beta and tau levels). Second, we examine the longitudinal associations of baseline CSF HFABP levels and the variability of HFABP with cognitive measures and AD biomarkers. Structural equation models explored the mediation effects of AD pathologies on cognition.ResultsWe found a significant relationship between CSF HFABP level and P-tau (dataset 1: β = 2.04, p < 0.001; dataset 2: β = 1.51, p < 0.001). We found significant associations of CSF HFABP with longitudinal cognitive measures (dataset 1: ADAS13, β = 0.09, p = 0.008; CDRSB, β = 0.10, p = 0.003; MMSE, β = −0.15, p < 0.001; dataset 2: ADAS13, β = 0.07, p = 0.004; CDRSB, β = 0.07, p = 0.005; MMSE, β = −0.09, p < 0.001) in longitudinal analysis. The variability of HFABP was associated with CSF P-tau (dataset 2: β = 3.62, p = 0.003). Structural equation modeling indicated that tau pathology mediated the relationship between HFABP and cognition.ConclusionOur findings demonstrated that HFABP was significantly associated with longitudinal cognitive changes, which might be partially mediated by tau pathology.
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Affiliation(s)
- Yan Fu
- Department of Neurology, Qingdao Municipal Hospital, Qingdao University, Qingdao, China
| | - Zuo-Teng Wang
- Department of Neurology, Qingdao Municipal Hospital, Qingdao University, Qingdao, China
- *Correspondence: Zuo-Teng Wang,
| | - Liang-Yu Huang
- Department of Neurology, Qingdao Municipal Hospital, Qingdao University, Qingdao, China
| | - Chen-Chen Tan
- Department of Neurology, Qingdao Municipal Hospital, Qingdao University, Qingdao, China
| | - Xi-Peng Cao
- Clinical Research Center, Qingdao Municipal Hospital, Qingdao University, Qingdao, China
| | - Lan Tan
- Department of Neurology, Qingdao Municipal Hospital, Qingdao University, Qingdao, China
- Lan Tan,
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12
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François M, Karpe AV, Liu JW, Beale DJ, Hor M, Hecker J, Faunt J, Maddison J, Johns S, Doecke JD, Rose S, Leifert WR. Multi-Omics, an Integrated Approach to Identify Novel Blood Biomarkers of Alzheimer's Disease. Metabolites 2022; 12:949. [PMID: 36295851 PMCID: PMC9610280 DOI: 10.3390/metabo12100949] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 09/29/2022] [Accepted: 10/03/2022] [Indexed: 11/16/2022] Open
Abstract
The metabolomic and proteomic basis of mild cognitive impairment (MCI) and Alzheimer's disease (AD) is poorly understood, and the relationships between systemic abnormalities in metabolism and AD/MCI pathogenesis is unclear. This study compared the metabolomic and proteomic signature of plasma from cognitively normal (CN) and dementia patients diagnosed with MCI or AD, to identify specific cellular pathways and new biomarkers altered with the progression of the disease. We analysed 80 plasma samples from individuals with MCI or AD, as well as age- and gender-matched CN individuals, by utilising mass spectrometry methods and data analyses that included combined pathway analysis and model predictions. Several proteins clearly identified AD from the MCI and CN groups and included plasma actins, mannan-binding lectin serine protease 1, serum amyloid A2, fibronectin and extracellular matrix protein 1 and Keratin 9. The integrated pathway analysis showed various metabolic pathways were affected in AD, such as the arginine, alanine, aspartate, glutamate and pyruvate metabolism pathways. Therefore, our multi-omics approach identified novel plasma biomarkers for the MCI and AD groups, identified changes in metabolic processes, and may form the basis of a biomarker panel for stratifying dementia participants in future clinical trials.
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Affiliation(s)
- Maxime François
- CSIRO Health & Biosecurity, Human Health Program, Molecular Diagnostic Solutions Group, Adelaide, SA 5000, Australia
| | - Avinash V. Karpe
- CSIRO Land & Water, Metabolomics Unit, Ecosciences Precinct, Dutton Park, QLD 4001, Australia
| | - Jian-Wei Liu
- CSIRO Land & Water, Agricultural and Environmental Sciences Precinct, Acton, Canberra, ACT 2601, Australia
| | - David J. Beale
- CSIRO Land & Water, Metabolomics Unit, Ecosciences Precinct, Dutton Park, QLD 4001, Australia
| | - Maryam Hor
- CSIRO Health & Biosecurity, Human Health Program, Molecular Diagnostic Solutions Group, Adelaide, SA 5000, Australia
| | - Jane Hecker
- Department of Internal Medicine, Royal Adelaide Hospital, Adelaide, SA 5000, Australia
| | - Jeff Faunt
- Department of General Medicine, Royal Adelaide Hospital, Adelaide, SA 5000, Australia
| | - John Maddison
- Aged Care Rehabilitation & Palliative Care, SA Health, Modbury Hospital, Modbury, SA 5092, Australia
| | - Sally Johns
- Aged Care Rehabilitation & Palliative Care, SA Health, Modbury Hospital, Modbury, SA 5092, Australia
| | - James D. Doecke
- Australian e-Health Research Centre, CSIRO, Level 7, Surgical Treatment and Rehabilitation Service—STARS, Herston, QLD 4029, Australia
| | - Stephen Rose
- Australian e-Health Research Centre, CSIRO, Level 7, Surgical Treatment and Rehabilitation Service—STARS, Herston, QLD 4029, Australia
| | - Wayne R. Leifert
- CSIRO Health & Biosecurity, Human Health Program, Molecular Diagnostic Solutions Group, Adelaide, SA 5000, Australia
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Singh MP, Chakrabarty R, Shabir S, Yousuf S, Obaid AA, Moustafa M, Al-Shehri M, Al-Emam A, Alamri AS, Alsanie WF, Alhomrani M, Shkodina AD, Singh SK. Influence of the Gut Microbiota on the Development of Neurodegenerative Diseases. Mediators Inflamm 2022; 2022:3300903. [PMID: 36248189 PMCID: PMC9553457 DOI: 10.1155/2022/3300903] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 08/22/2022] [Accepted: 09/19/2022] [Indexed: 11/29/2022] Open
Abstract
Neurodegenerative disorders are marked by neuronal death over time, causing a variety of cognitive and motor dysfunctions. Protein misfolding, neuroinflammation, and mitochondrial and protein clearance system dysfunction have all been identified as common pathways leading to neurodegeneration in recent decades. An altered microbiome of the gut, which is considered to play a central role in diseases as well as health, has recently been identified as another potential feature seen in neurodegenerative disorders. An array of microbial molecules that are released in the digestive tract may mediate gut-brain connections and permeate many organ systems, including the nervous system. Furthermore, recent findings from clinical as well as preclinical trials suggest that the microbiota of the gut plays a critical part in gut-brain interplay and that a misbalance in the composition of the gut microbiome may be linked to the etiology of neurological disorders (majorly neurodegenerative health problems); the underlying mechanism of which is still unknown. The review aims to consider the association between the microbiota of the gut and neurodegenerative disorders, as well as to add to our understanding of the significance of the gut microbiome in neurodegeneration and the mechanisms that underlie it. Knowing the mechanisms behind the gut microbiome's role and abundance will provide us with new insights that could lead to novel therapeutic strategies.
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Affiliation(s)
- Mahendra P. Singh
- School of Bioengineering and Biosciences, Lovely Professional University, Jalandhar-Ludhiana GT Road, Phagwara, 144411 Punjab, India
| | - Riya Chakrabarty
- School of Bioengineering and Biosciences, Lovely Professional University, Jalandhar-Ludhiana GT Road, Phagwara, 144411 Punjab, India
| | - Shabnam Shabir
- School of Bioengineering and Biosciences, Lovely Professional University, Jalandhar-Ludhiana GT Road, Phagwara, 144411 Punjab, India
| | - Sumaira Yousuf
- School of Bioengineering and Biosciences, Lovely Professional University, Jalandhar-Ludhiana GT Road, Phagwara, 144411 Punjab, India
| | - Ahmad A. Obaid
- Laboratory Medicine Department, Faculty of Applied Medical Sciences, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Mahmoud Moustafa
- Department of Biology, College of Science, King Khalid University, 9004 Abha, Saudi Arabia
- Department of Botany and Microbiology, Faculty of Science, South Valley University, Qena, Egypt
| | - Mohammed Al-Shehri
- Department of Biology, College of Science, King Khalid University, 9004 Abha, Saudi Arabia
| | - Ahmed Al-Emam
- Department of Pathology, College of Medicine, King Khalid University, Abha, Saudi Arabia
- Department of Forensic Medicine and Clinical Toxicology, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Abdulhakeem S. Alamri
- Department of Clinical Laboratory Sciences, the Faculty of Applied Medical Sciences, Taif University, Taif, Saudi Arabia
- Centre of Biomedical Sciences Research (CBSR), Deanship of Scientific Research, Taif University, Saudi Arabia
| | - Walaa F. Alsanie
- Department of Clinical Laboratory Sciences, the Faculty of Applied Medical Sciences, Taif University, Taif, Saudi Arabia
- Centre of Biomedical Sciences Research (CBSR), Deanship of Scientific Research, Taif University, Saudi Arabia
| | - Majid Alhomrani
- Department of Clinical Laboratory Sciences, the Faculty of Applied Medical Sciences, Taif University, Taif, Saudi Arabia
- Centre of Biomedical Sciences Research (CBSR), Deanship of Scientific Research, Taif University, Saudi Arabia
| | - Anastasiia D. Shkodina
- Department of Neurological Diseases, Poltava State Medical University, 36000 Poltava, Ukraine
| | - Sandeep K. Singh
- Indian Scientific Education and Technology Foundation, 226002, Lucknow, India
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14
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Predicting real world spatial disorientation in Alzheimer's disease patients using virtual reality navigation tests. Sci Rep 2022; 12:13397. [PMID: 35927285 PMCID: PMC9352716 DOI: 10.1038/s41598-022-17634-w] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Accepted: 07/28/2022] [Indexed: 11/08/2022] Open
Abstract
Spatial navigation impairments in Alzheimer's disease (AD) have been suggested to underlie patients experiencing spatial disorientation. Though many studies have highlighted navigation impairments for AD patients in virtual reality (VR) environments, the extent to which these impairments predict a patient's risk for spatial disorientation in the real world is still poorly understood. The aims of this study were to (a) investigate the spatial navigation abilities of AD patients in VR environments as well as in a real world community setting and (b) explore whether we could predict patients at a high risk for spatial disorientation in the community based on their VR navigation. Sixteen community-dwelling AD patients and 21 age/gender matched controls were assessed on their egocentric and allocentric navigation abilities in VR environments using the Virtual Supermarket Test (VST) and Sea Hero Quest (SHQ) as well as in the community using the Detour Navigation Test (DNT). When compared to controls, AD patients exhibited impairments on the VST, SHQ, and DNT. For patients, only SHQ wayfinding distance and wayfinding duration significantly predicted composite disorientation score on the DNT (β = 0.422, p = 0.034, R2 = 0.299 and β = 0.357, p = 0.046, R2 = 0.27 respectively). However, these same VR measures could not reliably predict which patients were at highest risk of spatial disorientation in the community (p > 0.1). Future studies should focus on developing VR-based tests which can predict AD patients at high risk of getting spatially disorientated in the real world.
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15
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Madani Neishaboori A, Eshraghi A, Tasouji Asl A, Shariatpanahi M, Yousefifard M, Gorji A. Adipose tissue-derived stem cells as a potential candidate in treatment of Alzheimer's disease: A systematic review on preclinical studies. Pharmacol Res Perspect 2022; 10:e00977. [PMID: 35718918 PMCID: PMC9207226 DOI: 10.1002/prp2.977] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 05/12/2022] [Accepted: 05/18/2022] [Indexed: 12/09/2022] Open
Abstract
In recent years, numerous investigations have evaluated the efficacy of adipose tissue-derived stem cells (ADSCs) and their exosome transplantation in managing Alzheimer's disease (AD) in different animal models. However, there are still many contradictions among the studies that hinder reaching a reliable conclusion. Therefore, we aimed to systematically review the existing evidence regarding the efficacy of ADSCs administration in treatment of AD. The systematic search was conducted in the databases of Medline (via PubMed), Embase, Scopus, and Web of Science, in addition to the manual search in Google and Google scholar, to find articles published until March 13, 2021. Preclinical studies were included and two independent reviewers summarized the eligible papers. Ten articles were included in our review. The treatment strategies varied between isolated ADSC, ADSCs exosomes, ADSCs conditioned medium, and combination therapy (ADSCs plus conditioned medium in one study, and ADSCs plus melatonin in another study). Overview of the included articles showed promising results of ADSCs and its conditioned medium/exosome administration in animal models of AD. These studies showed significant learning and memory improvements through ADSCs and their conditioned medium/exosome administration in animal models of AD. In addition, the application of ADSCs reduced the amyloid-beta plaque deposits in the hippocampus and neocortex of these animals. Based on the aforementioned evidence, studies have suggested potential beneficial effects of ADSCs in the treatment of AD, particularly through decreasing the size of Aβ plaques and improvement of cognitive deficits. Further investigations regarding the subject are encouraged to achieve more accurate conclusions.
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Affiliation(s)
| | - Azadeh Eshraghi
- Emergency Medicine Management Research Center, Health Management Research InstituteIran University of Medical SciencesTehranIran
| | | | - Marjan Shariatpanahi
- Department of Pharmacology and Toxicology, School of PharmacyIran University of Medical SciencesTehranIran
- Neuroscience Research Center (NRC)Iran University of Medical SciencesTehranIran
| | | | - Ali Gorji
- Epilepsy Research Center, Neurosurgery DepartmentWestfälische‐Wilhelms‐UniversitätMünsterGermany
- Shefa Neuroscience Research CenterKhatam Alanbia HospitalTehranIran
- Neuroscience Research CenterMashhad University of Medical SciencesTehranIran
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16
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Dias Viegas FP, Gontijo VS, de Freitas Silva M, Cristancho Ortiz CJ, Franco GDRR, Ernesto JT, Damasio CM, Fernandes Silva IM, Campos TG, Viegas C. Curcumin, Resveratrol and Cannabidiol as Natural Key Prototypes in Drug Design for Neuroprotective Agents. Curr Neuropharmacol 2022; 20:1297-1328. [PMID: 34825873 PMCID: PMC9881080 DOI: 10.2174/1570159x19666210712152532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 05/28/2021] [Accepted: 07/03/2021] [Indexed: 11/22/2022] Open
Abstract
Nowadays, neurodegenerative diseases (NDs), such as Parkinson's disease (PD), Alzheimer's disease (AD), Huntington's disease (HD), and amyotrophic lateral sclerosis (ALS), represent a great challenge in different scientific fields, such as neuropharmacology, medicinal chemistry, molecular biology and medicine, as all these pathologies remain incurable, with high socioeconomic impacts and high costs for governmental health services. Due to their severity and multifactorial pathophysiological complexity, the available approved drugs for clinic have not yet shown adequate effectiveness and exhibited very restricted options in the therapeutic arsenal; this highlights the need for continued drug discovery efforts in the academia and industry. In this context, natural products, such as curcumin (1), resveratrol (2) and cannabidiol (CBD, 3) have been recognized as important sources, with promising chemical entities, prototype models and starting materials for medicinal organic chemistry, as their molecular architecture, multifunctional properties and single chemical diversity could facilitate the discovery, optimization and development of innovative drug candidates with improved pharmacodynamics and pharmacokinetics compared to the known drugs and, perhaps, provide a chance for discovering novel effective drugs to combat NDs. In this review, we report the most recent efforts of medicinal chemists worldwide devoted to the exploration of curcumin (1), resveratrol (2) and cannabidiol (CBD, 3) as starting materials or privileged scaffolds in the design of multi-target directed ligands (MTDLs) with potential therapeutic properties against NDs, which have been published in the scientific literature during the last 10 years of research and are available in PubMed, SCOPUS and Web of Science databases.
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Affiliation(s)
- Flávia P. Dias Viegas
- PeQuiM - Laboratory of Research in Medicinal Chemistry, Institute of Chemistry, Federal University of Alfenas, Alfenas, 37133-840, Brazil; ,Programa de Pós-Graduação em Química, Federal University of Alfenas, 37133-840, Alfenas, Brazil
| | - Vanessa Silva Gontijo
- PeQuiM - Laboratory of Research in Medicinal Chemistry, Institute of Chemistry, Federal University of Alfenas, Alfenas, 37133-840, Brazil; ,Programa de Pós-Graduação em Ciências Farmacêuticas, Federal University of Alfenas, Alfenas, 37133-840, Brazil;
| | - Matheus de Freitas Silva
- PeQuiM - Laboratory of Research in Medicinal Chemistry, Institute of Chemistry, Federal University of Alfenas, Alfenas, 37133-840, Brazil; ,Programa de Pós-Graduação em Química, Federal University of Alfenas, 37133-840, Alfenas, Brazil
| | - Cindy Juliet Cristancho Ortiz
- PeQuiM - Laboratory of Research in Medicinal Chemistry, Institute of Chemistry, Federal University of Alfenas, Alfenas, 37133-840, Brazil; ,Programa de Pós-Graduação em Química, Federal University of Alfenas, 37133-840, Alfenas, Brazil
| | - Graziella dos Reis Rosa Franco
- PeQuiM - Laboratory of Research in Medicinal Chemistry, Institute of Chemistry, Federal University of Alfenas, Alfenas, 37133-840, Brazil; ,Programa de Pós-Graduação em Química, Federal University of Alfenas, 37133-840, Alfenas, Brazil
| | - Januário Tomás Ernesto
- PeQuiM - Laboratory of Research in Medicinal Chemistry, Institute of Chemistry, Federal University of Alfenas, Alfenas, 37133-840, Brazil; ,Programa de Pós-Graduação em Ciências Farmacêuticas, Federal University of Alfenas, Alfenas, 37133-840, Brazil;
| | - Caio Miranda Damasio
- PeQuiM - Laboratory of Research in Medicinal Chemistry, Institute of Chemistry, Federal University of Alfenas, Alfenas, 37133-840, Brazil;
| | - Isabela Marie Fernandes Silva
- PeQuiM - Laboratory of Research in Medicinal Chemistry, Institute of Chemistry, Federal University of Alfenas, Alfenas, 37133-840, Brazil;
| | - Thâmara Gaspar Campos
- PeQuiM - Laboratory of Research in Medicinal Chemistry, Institute of Chemistry, Federal University of Alfenas, Alfenas, 37133-840, Brazil;
| | - Claudio Viegas
- PeQuiM - Laboratory of Research in Medicinal Chemistry, Institute of Chemistry, Federal University of Alfenas, Alfenas, 37133-840, Brazil; ,Programa de Pós-Graduação em Ciências Farmacêuticas, Federal University of Alfenas, Alfenas, 37133-840, Brazil; ,Programa de Pós-Graduação em Química, Federal University of Alfenas, 37133-840, Alfenas, Brazil,Address correspondence to this author at the PeQuiM - Laboratory of Research in Medicinal Chemistry, Institute of Chemistry, Federal University of Alfenas, 37133-840, Brazil; Tel: +55 35 37011880; E-mail:
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Chakrabarty R, Yousuf S, Singh MP. Contributive Role of Hyperglycemia and Hypoglycemia Towards the Development of Alzheimer's Disease. Mol Neurobiol 2022; 59:4274-4291. [PMID: 35503159 DOI: 10.1007/s12035-022-02846-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 04/20/2022] [Indexed: 11/30/2022]
Abstract
Alzheimer's disease (AD) is one of the causes of dementia that results from several infections/biological conditions leading to either cell disruption or loss of neuronal communication. Studies have documented the accumulation of two proteins, beta-amyloid (Aβ), which accumulates on the exteriors of neurons, and tau (Tau), which assembles at the interiors of brain cells and is chiefly liable for the progression of the disease. Several molecular and cellular pathways account for the accumulation of amyloid-β and the formation of neurofibrillary tangles, which are phosphorylated variants of Tau protein. Moreover, research has revealed a potential connection between AD and diabetes. It has also been demonstrated that both hypoglycemia and hyperglycemia have a significant role in the development of AD. In addition, SUMO (small ubiquitin-like modifier protein) plays a crucial role in the pathogenesis of AD. SUMOylation is the process by which modification of amyloid precursor protein (APP) and Tau takes place. Furthermore, Drosophila melanogaster has proven to be an efficient model organism in studies to establish the relationship between AD and variations in blood glucose levels. In addition, the review successfully identifies the common pathway that links the effects of fluctuations in glucose levels on AD pathogenesis and advancements.
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Affiliation(s)
- Riya Chakrabarty
- School of Bioengineering and Biosciences, Lovely Professional University, Jalandhar-Ludhiana National Highway, Phagwara, Punjab, 144411, India
| | - Sumaira Yousuf
- School of Bioengineering and Biosciences, Lovely Professional University, Jalandhar-Ludhiana National Highway, Phagwara, Punjab, 144411, India
| | - Mahendra P Singh
- School of Bioengineering and Biosciences, Lovely Professional University, Jalandhar-Ludhiana National Highway, Phagwara, Punjab, 144411, India.
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Faßbender RV, Goedecke J, Visser-Vandewalle V, Fink GR, Onur OA. [Brain Stimulation for the Treatment of Dementia]. FORTSCHRITTE DER NEUROLOGIE-PSYCHIATRIE 2022; 90:336-342. [PMID: 35483888 DOI: 10.1055/a-1787-0335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Due to the increasing number of cases of Alzheimer's disease and the relatively moderate success with the available symptomatic and causal pharmacological therapies, there is a considerable need to explore non-pharmacological treatment options. In the field of non-invasive brain stimulation (NIBS), various methods have been investigated, particularly transcranial magnetic stimulation and transcranial electrical stimulation. In addition, deep brain stimulation (DBS) is currently being researched as an innovative method for targeted neuromodulation. Both non-invasive and invasive approaches aim to modulate neuronal activity and improve cognitive-mnestic functions. Secondary mechanisms such as long-term potentiation in NIBS or neurogenesis in DBS could also achieve long-term positive effects. Preclinical and clinical studies have already shown promising results in patients in early stages of Alzheimer's disease. However, inconsistent study and stimulation protocols and small sample sizes make it difficult to assess efficacy. Further research is warranted to enable the use of non-invasive or invasive neuromodulatory approaches in clinical practice in the near future.
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Affiliation(s)
- Ronja V Faßbender
- Klinik und Poliklinik für Neurologie, Medizinische Fakultät und Uniklinik Köln, Universität zu Köln, Köln, Germany.,Institut für Neurowissenschaften (INM-3), Forschungszentrum Jülich, Jülich, Germany
| | - Jana Goedecke
- Klinik und Poliklinik für Neurologie, Medizinische Fakultät und Uniklinik Köln, Universität zu Köln, Köln, Germany
| | - Veerle Visser-Vandewalle
- Klinik und Poliklinik für Stereotaxie und Funktionelle Neurochirurgie, Medizinische Fakultät und Uniklinik Köln, Universität zu Köln, Köln, Germany
| | - Gereon R Fink
- Klinik und Poliklinik für Neurologie, Medizinische Fakultät und Uniklinik Köln, Universität zu Köln, Köln, Germany.,Institut für Neurowissenschaften (INM-3), Forschungszentrum Jülich, Jülich, Germany
| | - Oezguer A Onur
- Klinik und Poliklinik für Neurologie, Medizinische Fakultät und Uniklinik Köln, Universität zu Köln, Köln, Germany.,Institut für Neurowissenschaften (INM-3), Forschungszentrum Jülich, Jülich, Germany
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19
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Puthusseryppady V, Morrissey S, Aung MH, Coughlan G, Patel M, Hornberger M. Using GPS Tracking to Investigate Outdoor Navigation Patterns in Patients With Alzheimer Disease: Cross-sectional Study. JMIR Aging 2022; 5:e28222. [PMID: 35451965 PMCID: PMC9073623 DOI: 10.2196/28222] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 12/01/2021] [Accepted: 02/07/2022] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Spatial disorientation is one of the earliest and most distressing symptoms seen in patients with Alzheimer disease (AD) and can lead to them getting lost in the community. Although it is a prevalent problem worldwide and is associated with various negative consequences, very little is known about the extent to which outdoor navigation patterns of patients with AD explain why spatial disorientation occurs for them even in familiar surroundings. OBJECTIVE This study aims to understand the outdoor navigation patterns of patients with AD in different conditions (alone vs accompanied; disoriented vs not disoriented during the study) and investigate whether patients with AD experienced spatial disorientation when navigating through environments with a high outdoor landmark density and complex road network structure (road intersection density, intersection complexity, and orientation entropy). METHODS We investigated the outdoor navigation patterns of community-dwelling patients with AD (n=15) and age-matched healthy controls (n=18) over a 2-week period using GPS tracking and trajectory mining analytical techniques. Here, for the patients, the occurrence of any spatial disorientation behavior during this tracking period was recorded. We also used a spatial buffer methodology to capture the outdoor landmark density and features of the road network in the environments that the participants visited during the tracking period. RESULTS The patients with AD had outdoor navigation patterns similar to those of the controls when they were accompanied; however, when they were alone, they had significantly fewer outings per day (total outings: P<.001; day outings: P=.003; night outings: P<.001), lower time spent moving per outing (P=.001), lower total distance covered per outing (P=.009), lower walking distance per outing (P=.02), and lower mean distance from home per outing (P=.004). Our results did not identify any mobility risk factors for spatial disorientation. We also found that the environments visited by patients who experienced disorientation versus those who maintained their orientation during the tracking period did not significantly differ in outdoor landmark density (P=.60) or road network structure (road intersection density: P=.43; intersection complexity: P=.45; orientation entropy: P=.89). CONCLUSIONS Our findings suggest that when alone, patients with AD restrict the spatial and temporal extent of their outdoor navigation in the community to successfully reduce their perceived risk of spatial disorientation. Implications of this work highlight the importance for future research to identify which of these individuals may be at an actual high risk for spatial disorientation as well as to explore the implementation of health care measures to help maintain a balance between patients' right to safety and autonomy when making outings alone in the community.
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Affiliation(s)
- Vaisakh Puthusseryppady
- Norwich Medical School, University of East Anglia, Norwich, United Kingdom
- Department of Neurobiology and Behavior, University of California Irvine, Irvine, CA, United States
| | - Sol Morrissey
- Norwich Medical School, University of East Anglia, Norwich, United Kingdom
| | - Min Hane Aung
- School of Computing Sciences, University of East Anglia, Norwich, United Kingdom
| | - Gillian Coughlan
- Rotman Research Institute, Baycrest, ON, Canada
- Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
| | - Martyn Patel
- Norfolk and Norwich University Hospitals National Health Service Foundation Trust, Norwich, United Kingdom
| | - Michael Hornberger
- Norwich Medical School, University of East Anglia, Norwich, United Kingdom
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20
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Differential Transcriptome Profiling Unveils Novel Deregulated Gene Signatures Involved in Pathogenesis of Alzheimer's Disease. Biomedicines 2022; 10:biomedicines10030611. [PMID: 35327413 PMCID: PMC8945049 DOI: 10.3390/biomedicines10030611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 02/13/2022] [Accepted: 02/28/2022] [Indexed: 02/01/2023] Open
Abstract
Alzheimer’s disease (AD) is a neurodegenerative disorder that is characterized by a progressive loss of cognitive functions at a higher level than normal aging. Although the apolipoprotein (APOE) gene is a major risk factor in developing AD, other genes have also been reported to be linked with complex phenotypes. Therefore, this genome-wide expression study explored differentially expressed genes as possible novel biomarkers involved in AD. The mRNA expression dataset, GSE28146, containing 15 sample data composed of 7 AD cases from the hippocampus region with age-matched control (n = 8, >80 years), was analyzed. Using “affy” R-package, mRNA expression was calculated, while pathway enrichment analysis was performed to determine related biological processes. Of 58 differentially expressed genes, 44 downregulated and 14 upregulated genes were found to be significantly (p < 0.001) altered. The pathway enrichment analysis revealed two altered genes, i.e., dynein light chain 1 (DYNLL1) and kalirin (KLRN), associated with AD in the elderly population. The majority of genes were associated with retrograde endocannabinoid as well as vascular endothelial growth factors affecting the complex phenotypes. The DYNLL1 and KLRN genes may be involved with AD and Huntington’s disease (HD) phenotypes and represent a common genetic basis of these diseases. However, the hallmark of AD is dementia, while the classic motor sign of HD includes chorea. Our data warrant further investigation to identify the role of these genes in disease pathogenesis.
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21
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Siddique Y. Neurodegenerative Disorders and the Current State, Pathophysiology, and Management of Parkinson's Disease. CNS & NEUROLOGICAL DISORDERS DRUG TARGETS 2022; 21:574-595. [PMID: 34477534 DOI: 10.2174/1871527320666210903101841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Revised: 12/14/2020] [Accepted: 02/13/2021] [Indexed: 06/13/2023]
Abstract
In the last few decades, major knowledge has been gained about pathophysiological aspects and molecular pathways behind Parkinson's Disease (PD). Based on neurotoxicological studies and postmortem investigations, there is a general concept of how environmental toxicants (neurotoxins, pesticides, insecticides) and genetic factors (genetic mutations in PD-associated proteins) cause depletion of dopamine from substantia nigra pars compacta region of the midbrain and modulate cellular processes leading to the pathogenesis of PD. α-Synuclein, a neuronal protein accumulation in oligomeric form, called protofibrils, is associated with cellular dysfunction and neuronal death, thus possibly contributing to PD propagation. With advances made in identifying loci that contribute to PD, molecular pathways involved in disease pathogenesis are now clear, and introducing therapeutic strategy at the right time may delay the progression. Biomarkers for PD have helped monitor PD progression; therefore, personalized therapeutic strategies can be facilitated. In order to further improve PD diagnostic and prognostic accuracy, independent validation of biomarkers is required.
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Affiliation(s)
- Yasir Siddique
- Drosophila Transgenic Laboratory, Section of Genetics, Department of Zoology, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, 202002, Uttar Pradesh, India
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22
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Yang X, Zhang R, Sun Z, Kurths J. Controlling Alzheimer's Disease Through the Deep Brain Stimulation to Thalamic Relay Cells. Front Comput Neurosci 2021; 15:636770. [PMID: 34819845 PMCID: PMC8606419 DOI: 10.3389/fncom.2021.636770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 10/11/2021] [Indexed: 11/23/2022] Open
Abstract
Experimental and clinical studies have shown that the technique of deep brain stimulation (DBS) plays a potential role in the regulation of Alzheimer’s disease (AD), yet it still desires for ongoing studies including clinical trials, theoretical approach and action mechanism. In this work, we develop a modified thalamo-cortico-thalamic (TCT) model associated with AD to explore the therapeutic effects of DBS on AD from the perspective of neurocomputation. First, the neuropathological state of AD resulting from synapse loss is mimicked by decreasing the synaptic connectivity strength from the Inter-Neurons (IN) neuron population to the Thalamic Relay Cells (TRC) neuron population. Under such AD condition, a specific deep brain stimulation voltage is then implanted into the neural nucleus of TRC in this TCT model. The symptom of AD is found significantly relieved by means of power spectrum analysis and nonlinear dynamical analysis. Furthermore, the therapeutic effects of DBS on AD are systematically examined in different parameter space of DBS. The results demonstrate that the controlling effect of DBS on AD can be efficient by appropriately tuning the key parameters of DBS including amplitude A, period P and duration D. This work highlights the critical role of thalamus stimulation for brain disease, and provides a theoretical basis for future experimental and clinical studies in treating AD.
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Affiliation(s)
- XiaoLi Yang
- School of Mathematics and Statistics, Shaanxi Normal University, Xi'an, China
| | - RuiXi Zhang
- School of Mathematics and Statistics, Shaanxi Normal University, Xi'an, China
| | - ZhongKui Sun
- Department of Applied Mathematics, Northwestern Polytechnical University, Xi'an, China
| | - Jürgen Kurths
- Potsdam Institute for Climate Impact Research, Potsdam, Germany.,Department of Physics, Humboldt University of Berlin, Berlin, Germany.,Centre for Analysis of Complex Systems, World-Class Research Center "Digital Biodesign and Personalized Healthcare", Sechenov First Moscow State Medical University, Moscow, Russia
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23
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Wang X, Wu M. Research progress of gut microbiota and frailty syndrome. Open Med (Wars) 2021; 16:1525-1536. [PMID: 34712824 PMCID: PMC8511967 DOI: 10.1515/med-2021-0364] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 07/27/2021] [Accepted: 08/23/2021] [Indexed: 12/30/2022] Open
Abstract
Frailty is a clinical syndrome caused by homeostasis imbalance. It is characterized by marked vulnerability to endogenous or exogenous stressors, reduced self-care ability, and increased mortality risk. This aging-related syndrome is common in individuals older than 65 years and carries an increased risk for poor health outcomes. These include falls, incident disability, incapacity, and mortality. In addition, it can result in a poor prognosis for other comorbidities. With the aging population, frailty increases the burden of adverse health outcomes. Studies on frailty are at their infancy. In addition, there is a lack of thorough understanding of its pathogenesis. Several studies have suggested that frailty is caused by chronic inflammation due to enhanced intestinal permeability following gut microbiota imbalance as well as pathogen-related antibodies entering the circulation system. These result in musculoskeletal system disorders and neurodegenerative diseases. However, this assumption has not been validated in large cohort-based studies. Several studies have suggested that inflammation is not the only cause of frailty. Hence, further studies are necessary to extend our understanding of its pathogenesis. This review summarizes the research findings in the field and expands on the possible role of the gut microbiota in frailty syndrome.
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Affiliation(s)
- Xiao Wang
- Geriatrics Department, Zhejiang Hospital, Hangzhou 310013, China
| | - Min Wu
- Geriatrics Department, Zhejiang Hospital, Hangzhou 310013, China
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24
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Investigating the Regulation of Neural Differentiation and Injury in PC12 Cells Using Microstructure Topographic Cues. BIOSENSORS-BASEL 2021; 11:bios11100399. [PMID: 34677355 PMCID: PMC8534126 DOI: 10.3390/bios11100399] [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: 09/06/2021] [Revised: 10/12/2021] [Accepted: 10/14/2021] [Indexed: 11/30/2022]
Abstract
In this study, we designed and manufactured a series of different microstructure topographical cues for inducing neuronal differentiation of cells in vitro, with different topography, sizes, and structural complexities. We cultured PC12 cells in these microstructure cues and then induced neural differentiation using nerve growth factor (NGF). The pheochromocytoma cell line PC12 is a validated neuronal cell model that is widely used to study neuronal differentiation. Relevant markers of neural differentiation and cytoskeletal F-actin were characterized. Cellular immunofluorescence detection and axon length analysis showed that the differentiation of PC12 cells was significantly different under different isotropic and anisotropic topographic cues. The expression differences of the growth cone marker growth-associated protein 43 (GAP-43) and sympathetic nerve marker tyrosine hydroxylase (TH) genes were also studied in different topographic cues. Our results revealed that the physical environment has an important influence on the differentiation of neuronal cells, and 3D constraints could be used to guide axon extension. In addition, the neurotoxin 6-hydroxydopamine (6-OHDA) was used to detect the differentiation and injury of PC12 cells under different topographic cues. Finally, we discussed the feasibility of combining the topographic cues and the microfluidic chip for neural differentiation research.
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25
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Feter N, Leite JS, Alt R, Rombaldi AJ. Ethnoracial disparity among patients with dementia during COVID-19 pandemic. CAD SAUDE PUBLICA 2021; 37:e00028321. [PMID: 34644729 DOI: 10.1590/0102-311x00028321] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 05/14/2021] [Indexed: 11/22/2022] Open
Abstract
We aim to examine the effect of the COVID-19 pandemic on the ethnoracial disparities in hospitalizations due to dementia and its related outcomes, in Brazil. A longitudinal panel study was carried out with data extracted from the Hospital Information Systems of the Brazilian Unified National Health System (SIH/SUS). We assessed the number of hospital admission per 100,000 inhabitants, mean inpatient spending, and inpatient mortality rate due to dementia during the first semester of 2019 and 2020. Data were stratified by geographic region and ethnoracial groups (black, mixed, and white) based on skin color. We observed an overall reduction in hospital admissions, mean inpatient spending, and mortality rate between the first semester of 2019 and 2020. However, the reduction of hospitalization rates among black and mixed people was 105.3% and 121.1% greater than in whites, respectively. Mortality rate was decreased by 9% in whites and was increased by 65% and 43% in the black and mixed population, respectively. In the first semester of 2020, black and mixed patients had a higher risk of losing their lives due to dementia than white people. This disparity was not observed in the same period of 2019. In 2020, the inpatient mortality ratio reached the highest values among black individuals in all regions but the North (no data available). Since the beginning of the COVID-19 epidemic in Brazil, ethnoracial disparity in hospital admissions and mortality rates due to dementia has been heightened. Governmental actions and policies to mitigate this indirect effect of the pandemic on the Brazilian population are urgent.
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Affiliation(s)
- Natan Feter
- Universidade Federal de Pelotas, Pelotas, Brasil.,The University of Queensland, St. Lucia, Australia
| | | | - Ricardo Alt
- Universidade Federal de Pelotas, Pelotas, Brasil
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26
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Prenylated isoflavones from the roots of Flemingia philippinensis as potential inhibitors of β-amyloid aggregation. Fitoterapia 2021; 155:105060. [PMID: 34637885 DOI: 10.1016/j.fitote.2021.105060] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 10/04/2021] [Accepted: 10/06/2021] [Indexed: 11/22/2022]
Abstract
In our efforts to find potential agents for the treatment of Alzheimer's disease in naturally occurring compounds, a systematic investigation for the active constituents of Flemingia philippinensis was carried out. Four new prenylated isoflavones, philippinone A-D (1-4), together with six known analogues (5-10), were obtained from the roots of Flemingia philippinensis. Their structures were established through extensive physical and spectroscopic data analysis. All the isolates were evaluated for their inhibitory effect of self-induced Aβ aggregation among which compound 5 showed significant Aβ aggregation inhibitory ability with the inhibitory rate of 70.56%. The results of molecular docking experiment for compounds 1 and 6 corresponded to that of the thioflavin-T assay. Moreover, the results further clarified the effects of different substituent group of tested compounds on the Aβ aggregation inhibition. A preliminary structure-activity relationship is further discussed. Our results suggested that the isoflavonoids may mitigate the progression of AD and compounds 2 and 5 may be a candidate in the treatment of AD.
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27
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You P, Li X, Wang Z, Wang H, Dong B, Li Q. Characterization of Brain Iron Deposition Pattern and Its Association With Genetic Risk Factor in Alzheimer's Disease Using Susceptibility-Weighted Imaging. Front Hum Neurosci 2021; 15:654381. [PMID: 34163341 PMCID: PMC8215439 DOI: 10.3389/fnhum.2021.654381] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Accepted: 04/27/2021] [Indexed: 11/30/2022] Open
Abstract
The presence of iron is an important factor for normal brain functions, whereas excessive deposition of iron may impair normal cognitive function in the brain and lead to Alzheimer’s disease (AD). MRI has been widely applied to characterize brain structural and functional changes caused by AD. However, the effectiveness of using susceptibility-weighted imaging (SWI) for the analysis of brain iron deposition is still unclear, especially within the context of early AD diagnosis. Thus, in this study, we aim to explore the relationship between brain iron deposition measured by SWI with the progression of AD using various feature selection and classification methods. The proposed model was evaluated on a 69-subject SWI imaging dataset consisting of 24 AD patients, 21 mild cognitive impairment patients, and 24 normal controls. The identified AD progression-related regions were then compared with the regions reported from previous genetic association studies, and we observed considerable overlap between these two. Further, we have identified a new potential AD-related gene (MEF2C) closely related to the interaction between iron deposition and AD progression in the brain.
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Affiliation(s)
- Peiting You
- Beijing International Center for Mathematical Research, Peking University, Beijing, China.,Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States
| | - Xiang Li
- Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States
| | - Zhijiang Wang
- Peking University Institute of Mental Health (Sixth Hospital), Beijing, China.,National Clinical Research Center for Mental Disorders and Key Laboratory of Mental Health, Ministry of Health, Peking University, Beijing, China.,Beijing Municipal Key Laboratory for Translational Research on Diagnosis and Treatment of Dementia, Beijing, China
| | - Huali Wang
- Peking University Institute of Mental Health (Sixth Hospital), Beijing, China.,National Clinical Research Center for Mental Disorders and Key Laboratory of Mental Health, Ministry of Health, Peking University, Beijing, China.,Beijing Municipal Key Laboratory for Translational Research on Diagnosis and Treatment of Dementia, Beijing, China
| | - Bin Dong
- Beijing International Center for Mathematical Research, Peking University, Beijing, China
| | - Quanzheng Li
- Massachusetts General Hospital and Harvard Medical School, Boston, MA, United States
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28
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Pathak GA, Barber RC, Phillips NR. Multiomics Investigation of Hypertension and White Matter Hyperintensity as a Source of Vascular Dementia or a Comorbidity to Alzheimer's Disease. Curr Alzheimer Res 2021; 18:171-177. [PMID: 33888050 DOI: 10.2174/1567205018666210422133547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 02/27/2021] [Accepted: 04/06/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Age-related comorbidity is common and significantly increases the burden for the healthcare of the elderly. Alzheimer's disease (AD) and hypertension are the two most prevalent age-related conditions and are highly comorbid. While hypertension is a risk factor for vascular dementia (VD), hypertension with AD (ADHyp+) is often characterized as probable vascular dementia. In the absence of imaging and other diagnostic tests, differentiating the two pathological states is difficult. OBJECTIVE Our goals are to (1) identify differences in CSF-based vascular dementia profiles, if any, between individuals who have AD only (ADHyp-), and individuals with ADHyp+ using CSF levels of amyloid β, tau and p-tau, and (2) compare genome-wide DNA profiles of ADHyp- and ADHyp+ with an unaffected control population. METHOD Genotype and clinical data were used to compare healthy controls to AD Hyp- vs. AD Hyp+. We compared the CSF biomarkers followed by evaluating genome wide profiles in three groups, and mapped SNPs to genes based on position and lowest p-value. The significant genes were examined for co-expression and known disease networks. RESULTS We found no differences between Aβ, tau and p-tau levels between ADHyp- and ADHyp+. We found TOMM40 to be associated with ADHyp- as expected but not with ADHyp+. Interestingly, SLC9A3R2 polymorphism was associated with ADHyp+, and significant gene expression changes were observed for neighboring genes. CONCLUSION Through this exploratory study using a novel cohort stratification design, we highlight the genetic differences in clinically similar phenotypes, indicating the utility of genetic profiling in aiding differential diagnosis of ADHyp+ and VD.
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Affiliation(s)
- Gita A Pathak
- Department of Microbiology, Immunology & Genetics, University of North Texas Health Science Center Fort Worth, Texas 76107, United States
| | - Robert C Barber
- Department of Microbiology, Immunology & Genetics, University of North Texas Health Science Center Fort Worth, Texas 76107, United States
| | - Nicole R Phillips
- Department of Microbiology, Immunology & Genetics, University of North Texas Health Science Center Fort Worth, Texas 76107, United States
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29
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Goldwaser EL, Acharya NK, Wu H, Godsey GA, Sarkar A, DeMarshall CA, Kosciuk MC, Nagele RG. Evidence that Brain-Reactive Autoantibodies Contribute to Chronic Neuronal Internalization of Exogenous Amyloid-β1-42 and Key Cell Surface Proteins During Alzheimer's Disease Pathogenesis. J Alzheimers Dis 2021; 74:345-361. [PMID: 32039847 PMCID: PMC7175946 DOI: 10.3233/jad-190962] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Blood-brain barrier (BBB) permeability is a recognized early feature of Alzheimer’s disease (AD). In the present study, we examined consequences of increased BBB permeability on the development of AD-related pathology by tracking selected leaked plasma components and their interactions with neurons in vivo and in vitro. Histological sections of cortical regions of postmortem AD brains were immunostained to determine the distribution of amyloid-β1-42 (Aβ42), cathepsin D, IgG, GluR2/3, and alpha7 nicotinic acetylcholine receptor (α7nAChR). Results revealed that chronic IgG binding to pyramidal neurons coincided with internalization of Aβ42, IgG, GluR2/3, and α7nAChR as well as lysosomal compartment expansion in these cells in regions of AD pathology. To test possible mechanistic interrelationships of these phenomena, we exposed differentiated SH-SY5Y neuroblastoma cells to exogenous, soluble Aβ42 peptide and serum from AD and control subjects. The rate and extent of Aβ42 internalization in these cells was enhanced by serum containing neuron-binding IgG autoantibodies. This was confirmed by treating cells with individual antibodies specific for α7nAChR, purified IgG from AD or non-AD sera, and sera devoid of IgG, in the presence of 100 nM Aβ42. Initial co-localization of IgG, α7nAChR, and Aβ42 was temporally and spatially linked to early endosomes (Rab11) and later to lysosomes (LAMP-1). Aβ42 internalization was attenuated by treatment with monovalent F(ab) antibody fragments generated from purified IgG from AD serum and then rescued by coupling F(ab) fragments with divalent human anti-Fab. Overall, results suggest that cross-linking of neuron-binding autoantibodies targeting cell surface proteins can accelerate intraneuronal Aβ42 deposition in AD.
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Affiliation(s)
- Eric L Goldwaser
- University of Maryland Medical Center and Sheppard Pratt Health System, Department of Psychiatry, Baltimore, MD, USA.,Biomarker Discovery Center, New Jersey Institute for Successful Aging, Rowan University School of Osteopathic Medicine, Stratford, NJ, USA.,Graduate School of Biomedical Sciences, Rowan University, Stratford, NJ, USA
| | - Nimish K Acharya
- Biomarker Discovery Center, New Jersey Institute for Successful Aging, Rowan University School of Osteopathic Medicine, Stratford, NJ, USA.,Graduate School of Biomedical Sciences, Rowan University, Stratford, NJ, USA.,Department of Geriatrics and Gerontology, Rowan University School of Osteopathic Medicine, Stratford, NJ, USA
| | - Hao Wu
- Graduate School of Biomedical Sciences, Rowan University, Stratford, NJ, USA
| | - George A Godsey
- Biomarker Discovery Center, New Jersey Institute for Successful Aging, Rowan University School of Osteopathic Medicine, Stratford, NJ, USA.,Graduate School of Biomedical Sciences, Rowan University, Stratford, NJ, USA
| | - Abhirup Sarkar
- Biomarker Discovery Center, New Jersey Institute for Successful Aging, Rowan University School of Osteopathic Medicine, Stratford, NJ, USA.,Graduate School of Biomedical Sciences, Rowan University, Stratford, NJ, USA
| | - Cassandra A DeMarshall
- Biomarker Discovery Center, New Jersey Institute for Successful Aging, Rowan University School of Osteopathic Medicine, Stratford, NJ, USA.,Graduate School of Biomedical Sciences, Rowan University, Stratford, NJ, USA
| | - Mary C Kosciuk
- Biomarker Discovery Center, New Jersey Institute for Successful Aging, Rowan University School of Osteopathic Medicine, Stratford, NJ, USA.,Department of Geriatrics and Gerontology, Rowan University School of Osteopathic Medicine, Stratford, NJ, USA
| | - Robert G Nagele
- Biomarker Discovery Center, New Jersey Institute for Successful Aging, Rowan University School of Osteopathic Medicine, Stratford, NJ, USA.,Graduate School of Biomedical Sciences, Rowan University, Stratford, NJ, USA.,Department of Geriatrics and Gerontology, Rowan University School of Osteopathic Medicine, Stratford, NJ, USA
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30
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Samandari-Bahraseman MR, Elyasi L. Apelin-13 protects human neuroblastoma SH-SY5Y cells against amyloid-beta induced neurotoxicity: Involvement of anti oxidant and anti apoptotic properties. J Basic Clin Physiol Pharmacol 2021; 33:599-605. [PMID: 33977683 DOI: 10.1515/jbcpp-2020-0294] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Accepted: 04/20/2021] [Indexed: 01/03/2023]
Abstract
OBJECTIVES We investigated the effect of apelin-13 on the cellular model of AD, amyloid-β (Aβ) treated SH-SY5Y cells in rats. METHODS The SH-SY5Y cells were pretreated with different doses of apelin-13 (1, 2.5, 5, and 10 μg/mL), half an hour before adding 50% Aβ treatment. After 24 h, cells were evaluated for survival, oxidative stress, mitochondrial calcium release, caspase-3, and cytochrome c levels, compared to control group (beta-actin). Statistical analysis was performed by SPSS 16. RESULTS Apelin-13 at the dose of 2.5 μg/mL protected against IC50 Aβ (p<0.001). Apelin-13 at doses of 1, 2.5, and 5 μg/mL showed protective effects against the reactive oxygen species (ROS) produced by Aβ (p<0.001). Apelin-13 at doses of 2.5 and 5 μg/mL reduced calcium release, caspase-3, and cytochrome c (all p<0.001). CONCLUSIONS Apelin-13 prevented apoptosis, oxidative stress, and mitochondrial toxicity and can be a suitable option for treatment of AD. The appropriate treatment strategy for humans has to be investigated in future studies.
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Affiliation(s)
| | - Leila Elyasi
- Golestan Neuroscience Research Center (GNRC), Department of Anatomy, Faculty of Medicine, Golestan University of Medical Sciences, Gorgan, Iran
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31
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François M, Karpe A, Liu JW, Beale D, Hor M, Hecker J, Faunt J, Maddison J, Johns S, Doecke J, Rose S, Leifert WR. Salivaomics as a Potential Tool for Predicting Alzheimer's Disease During the Early Stages of Neurodegeneration. J Alzheimers Dis 2021; 82:1301-1313. [PMID: 34151801 PMCID: PMC8461673 DOI: 10.3233/jad-210283] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/18/2021] [Indexed: 01/09/2023]
Abstract
BACKGROUND The metabolomic and proteomic basis of mild cognitive impairment (MCI) and Alzheimer's disease (AD) is poorly understood and the relationships between systemic abnormalities in metabolism and AD/AMCI pathogenesis are unclear. OBJECTIVE The aim of the study was to compare the metabolomic and proteomic signature of saliva from cognitively normal and patients diagnosed with MCI or AD, to identify specific cellular pathways altered with the progression of the disease. METHODS We analyzed 80 saliva samples from individuals with MCI or AD as well as age- and gender-matched healthy controls. Saliva proteomic and metabolomic analyses were conducted utilizing mass spectrometry methods and data combined using pathway analysis. RESULTS We found significant alterations in multiple cellular pathways, demonstrating that at the omics level, disease progression impacts numerous cellular processes. Multivariate statistics using SIMCA showed that partial least squares-data analysis could be used to provide separation of the three groups. CONCLUSION This study found significant changes in metabolites and proteins from multiple cellular pathways in saliva. These changes were associated with AD, demonstrating that this approach might prove useful to identify new biomarkers based upon integration of multi-omics parameters.
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Affiliation(s)
- Maxime François
- CSIRO Health & Biosecurity, Nutrition and Health Program, Molecular Diagnostic Solutions Group, Adelaide, South Australia, Australia
| | - Avinash Karpe
- CSIRO Land & Water, Metabolomics Unit, Ecosciences Precinct, Dutton Park, QLD, Australia
| | - Jian-Wei Liu
- CSIRO Land & Water, Agricultural and Environmental Sciences Precinct, Acton, Canberra, ACT, Australia
| | - David Beale
- CSIRO Land & Water, Metabolomics Unit, Ecosciences Precinct, Dutton Park, QLD, Australia
| | - Maryam Hor
- CSIRO Health & Biosecurity, Nutrition and Health Program, Molecular Diagnostic Solutions Group, Adelaide, South Australia, Australia
| | - Jane Hecker
- Department of Internal Medicine, Royal Adelaide Hospital, Adelaide, South Australia, Australia
| | - Jeff Faunt
- Department of General Medicine, Royal Adelaide Hospital, Adelaide, South Australia, Australia
| | - John Maddison
- Aged Care Rehabilitation & Palliative Care, SA Health, Modbury Hospital, South Australia, Australia
| | - Sally Johns
- Aged Care Rehabilitation & Palliative Care, SA Health, Modbury Hospital, South Australia, Australia
| | - James Doecke
- CSIRO Health and Biosecurity/Australian e-Health Research Centre Level 5, University of Queensland Health Sciences Building, Royal Brisbane and Women’s Hospital, Herston, Queensland, Australia
| | - Stephen Rose
- CSIRO Health and Biosecurity/Australian e-Health Research Centre Level 5, University of Queensland Health Sciences Building, Royal Brisbane and Women’s Hospital, Herston, Queensland, Australia
| | - Wayne R. Leifert
- CSIRO Health & Biosecurity, Nutrition and Health Program, Molecular Diagnostic Solutions Group, Adelaide, South Australia, Australia
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32
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Hescham S, Temel Y. Electrical stimulation of the fornix for the treatment of brain diseases. HANDBOOK OF CLINICAL NEUROLOGY 2021; 180:447-454. [PMID: 34225947 DOI: 10.1016/b978-0-12-820107-7.00028-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Deep brain stimulation (DBS) has proven to be safe and effective for both hypo- and hyperkinetic movement disorders of basal ganglia origin, while its application to other neural pathways such as the circuit of Papez is under investigation. In particular, the fornix has gained interest as potential DBS target to decrease rates of cognitive decline, enhance memory, aid visuospatial memorization, and improve verbal recollection. While the exact mechanisms of action of fornix DBS are not completely understood, studies found enhanced hippocampal acetylcholine release, synaptic plasticity, and decreased inflammatory responses in cortex and hippocampus. Nevertheless, it is still premature to conclude that fornix DBS can be used in the treatment of cognitive disorders, and the field needs sound, preclinically tested, and disease-specific a posteriori hypotheses.
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Affiliation(s)
- Sarah Hescham
- Department of Neurosurgery, Maastricht University Medical Center, Maastricht, The Netherlands.
| | - Yasin Temel
- Department of Neurosurgery, Maastricht University Medical Center, Maastricht, The Netherlands
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33
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Saridakis I, Doukakis S. Cognitive Enhancement Through Mathematical Problem-Solving. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1338:209-216. [DOI: 10.1007/978-3-030-78775-2_25] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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34
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Torfeh A, Abdolmaleki Z, Nazarian S, Shirazi Beheshtiha SH. Modafinil-coated nanoparticle increases expressions of brain-derived neurotrophic factor, glial cell line-derived neurotrophic factor and neuronal nuclear protein, and protects against middle cerebral artery occlusion-induced neuron apoptosis in the rat hippocampus. Anat Rec (Hoboken) 2020; 304:2032-2043. [PMID: 33345406 DOI: 10.1002/ar.24581] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 11/04/2020] [Accepted: 11/30/2020] [Indexed: 11/08/2022]
Abstract
The present study investigates the neuroprotective effects of modafinil-coated nanoparticle in rats' hippocampal CA1 region. Male Wistar rats (n = 48) were randomly divided into four groups. Then middle cerebral artery occlusion (MCAO) was performed by inserting a silicone coat filament in the right internal carotid artery via the external carotid artery until it reached the anterior cerebral artery. Modafinil (100 mg/kg) or modafinil-coated nanoparticle (100 mg/kg) was given to the rats as an oral gavage once a day. Infarct volume, brain-derived neurotrophic factor (BDNF), glial cell line-derived neurotrophic factor (GDNF), neuronal nuclear protein (NeuN) and Caspase-3 and, Caspase-8 as apoptotic genes were measured in the hippocampal CA1 region. Cresyl violet staining revealed that modafinil nanoparticle significantly decreased the neurodegeneration. Reverse transcription polymerase chain reaction results showed that modafinil nanoparticle use significantly increased the expression of neurotrophic factors (even more than modafinil alone group; p = .01). Moreover, the apoptotic markers were significantly decreased in nanoparticle modafinil (MN group); p < .05). The western blot analysis and Immunohistochemistry results confirmed the neuroprotective and anti-apoptotic effects of modafinil nanoparticle. This study's results showed that the use of modafinil-coated nanoparticle has neuroprotective effects by increasing neurotrophic factors and reducing apoptosis after MCAO in the CA1 area of the hippocampus. However, further studies are needed especially, in human samples.
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Affiliation(s)
- Alireza Torfeh
- Department of Pharmacology, Karaj Branch, Islamic Azad University, Karaj, Iran
| | - Zohreh Abdolmaleki
- Department of Pharmacology, Karaj Branch, Islamic Azad University, Karaj, Iran
| | - Sepideh Nazarian
- Department of Pharmacology, Karaj Branch, Islamic Azad University, Karaj, Iran
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35
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Toden S, Zhuang J, Acosta AD, Karns AP, Salathia NS, Brewer JB, Wilcock DM, Aballi J, Nerenberg M, Quake SR, Ibarra A. Noninvasive characterization of Alzheimer's disease by circulating, cell-free messenger RNA next-generation sequencing. SCIENCE ADVANCES 2020; 6:eabb1654. [PMID: 33298436 PMCID: PMC7821903 DOI: 10.1126/sciadv.abb1654] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 10/21/2020] [Indexed: 05/09/2023]
Abstract
The lack of accessible noninvasive tools to examine the molecular alterations occurring in the brain limits our understanding of the causes and progression of Alzheimer's disease (AD), as well as the identification of effective therapeutic strategies. Here, we conducted a comprehensive profiling of circulating, cell-free messenger RNA (cf-mRNA) in plasma of 126 patients with AD and 116 healthy controls of similar age. We identified 2591 dysregulated genes in the cf-mRNA of patients with AD, which are enriched in biological processes well known to be associated with AD. Dysregulated genes included brain-specific genes and resembled those identified to be dysregulated in postmortem AD brain tissue. Furthermore, we identified disease-relevant circulating gene transcripts that correlated with the severity of cognitive impairment. These data highlight the potential of high-throughput cf-mRNA sequencing to evaluate AD-related pathophysiological alterations in the brain, leading to precision healthcare solutions that could improve AD patient management.
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Affiliation(s)
- Shusuke Toden
- Molecular Stethoscope Inc., 3210 Merryfield Row, San Diego, CA 92121, USA.
| | - Jiali Zhuang
- Molecular Stethoscope Inc., 3210 Merryfield Row, San Diego, CA 92121, USA
| | - Alexander D Acosta
- Molecular Stethoscope Inc., 3210 Merryfield Row, San Diego, CA 92121, USA
| | - Amy P Karns
- Molecular Stethoscope Inc., 3210 Merryfield Row, San Diego, CA 92121, USA
| | - Neeraj S Salathia
- Molecular Stethoscope Inc., 3210 Merryfield Row, San Diego, CA 92121, USA
| | - James B Brewer
- Department of Neurosciences, University of California, San Diego, La Jolla, CA 92093, USA
| | - Donna M Wilcock
- Department of Physiology, Sanders-Brown Center on Aging, 800 S. Limestone Street, Lexington, KY 40536, USA
| | - Jonathan Aballi
- Molecular Stethoscope Inc., 3210 Merryfield Row, San Diego, CA 92121, USA
| | - Mike Nerenberg
- Molecular Stethoscope Inc., 3210 Merryfield Row, San Diego, CA 92121, USA
| | - Stephen R Quake
- Departments of Bioengineering and Applied Physics, Stanford University, Stanford, CA 94305, USA
- Chan Zuckerberg Biohub, San Francisco, CA 94158, USA
| | - Arkaitz Ibarra
- Molecular Stethoscope Inc., 3210 Merryfield Row, San Diego, CA 92121, USA.
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36
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Gontijo VS, Viegas FPD, Ortiz CJC, de Freitas Silva M, Damasio CM, Rosa MC, Campos TG, Couto DS, Tranches Dias KS, Viegas C. Molecular Hybridization as a Tool in the Design of Multi-target Directed Drug Candidates for Neurodegenerative Diseases. Curr Neuropharmacol 2020; 18:348-407. [PMID: 31631821 PMCID: PMC7457438 DOI: 10.2174/1385272823666191021124443] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 08/27/2019] [Accepted: 10/19/2019] [Indexed: 12/14/2022] Open
Abstract
Neurodegenerative Diseases (NDs) are progressive multifactorial neurological pathologies related to neuronal impairment and functional loss from different brain regions. Currently, no effective treatments are available for any NDs, and this lack of efficacy has been attributed to the multitude of interconnected factors involved in their pathophysiology. In the last two decades, a new approach for the rational design of new drug candidates, also called multitarget-directed ligands (MTDLs) strategy, has emerged and has been used in the design and for the development of a variety of hybrid compounds capable to act simultaneously in diverse biological targets. Based on the polypharmacology concept, this new paradigm has been thought as a more secure and effective way for modulating concomitantly two or more biochemical pathways responsible for the onset and progress of NDs, trying to overcome low therapeutical effectiveness. As a complement to our previous review article (Curr. Med. Chem. 2007, 14 (17), 1829-1852. https://doi.org/10.2174/092986707781058805), herein we aimed to cover the period from 2008 to 2019 and highlight the most recent advances of the exploitation of Molecular Hybridization (MH) as a tool in the rational design of innovative multifunctional drug candidate prototypes for the treatment of NDs, specially focused on AD, PD, HD and ALS.
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Affiliation(s)
- Vanessa Silva Gontijo
- PeQuiM-Laboratory of Research in Medicinal Chemistry, Institute of Chemistry, Federal University of Alfenas, 37133-840, Brazil.,Programa de Pós-Graduação em Ciências Farmacêuticas, Federal University of Alfenas, 37133-840, Brazil
| | - Flávia P Dias Viegas
- PeQuiM-Laboratory of Research in Medicinal Chemistry, Institute of Chemistry, Federal University of Alfenas, 37133-840, Brazil.,Programa de Pós-Graduação em Química, Federal University of Alfenas, 37133-840, Brazil
| | - Cindy Juliet Cristancho Ortiz
- PeQuiM-Laboratory of Research in Medicinal Chemistry, Institute of Chemistry, Federal University of Alfenas, 37133-840, Brazil.,Programa de Pós-Graduação em Química, Federal University of Alfenas, 37133-840, Brazil
| | - Matheus de Freitas Silva
- PeQuiM-Laboratory of Research in Medicinal Chemistry, Institute of Chemistry, Federal University of Alfenas, 37133-840, Brazil.,Programa de Pós-Graduação em Química, Federal University of Alfenas, 37133-840, Brazil
| | - Caio Miranda Damasio
- PeQuiM-Laboratory of Research in Medicinal Chemistry, Institute of Chemistry, Federal University of Alfenas, 37133-840, Brazil
| | - Mayara Chagas Rosa
- PeQuiM-Laboratory of Research in Medicinal Chemistry, Institute of Chemistry, Federal University of Alfenas, 37133-840, Brazil
| | - Thâmara Gaspar Campos
- PeQuiM-Laboratory of Research in Medicinal Chemistry, Institute of Chemistry, Federal University of Alfenas, 37133-840, Brazil
| | - Dyecika Souza Couto
- PeQuiM-Laboratory of Research in Medicinal Chemistry, Institute of Chemistry, Federal University of Alfenas, 37133-840, Brazil
| | | | - Claudio Viegas
- PeQuiM-Laboratory of Research in Medicinal Chemistry, Institute of Chemistry, Federal University of Alfenas, 37133-840, Brazil.,Programa de Pós-Graduação em Ciências Farmacêuticas, Federal University of Alfenas, 37133-840, Brazil.,Programa de Pós-Graduação em Química, Federal University of Alfenas, 37133-840, Brazil
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37
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Puthusseryppady V, Coughlan G, Patel M, Hornberger M. Geospatial Analysis of Environmental Risk Factors for Missing Dementia Patients. J Alzheimers Dis 2020; 71:1005-1013. [PMID: 31450494 DOI: 10.3233/jad-190244] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Dementia-related missing incidents are highly prevalent but still poorly understood. This is particularly true for environmental/geospatial risk factors, which might contribute to these missing incidents. OBJECTIVE The study aimed to conduct a retrospective, observational analysis on a large sample of missing dementia patient case records provided by the police (n = 210), covering dates from January 2014 to December 2017. In particular, we wanted to explore 1) whether there were any hotspot regions of missing incidents and 2) the relationship between outdoor landmark density and missing incidents. METHODS Global spatial autocorrelation (Moran's I) was used to identify the potential hotspot regions for missing incidents. Meanwhile, spatial buffer and regression modelling were used to determine the relationship between outdoor landmark density and missing incidents. RESULTS Our demographics measures replicated and extended previous studies of dementia-related missing incidents. Meanwhile, no hotspot regions for missing incidents were identified, while higher outdoor landmark density led to increased missing incidents. CONCLUSION Our results highlight that missing incidents do not occur in isolated hotspots of regions but instead are endemic in patients regardless of location. Higher outdoor landmark density emerges as a significant geospatial factor for missing incidents in dementia, which crucially informs future safeguarding/intervention studies.
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Affiliation(s)
| | | | - Martyn Patel
- Norwich Medical School, University of East Anglia, Norwich, UK.,Norfolk and Norwich University Hospitals National Health Service (NHS) Foundation Trust, Colney Lane, Norwich, UK
| | - Michael Hornberger
- Norwich Medical School, University of East Anglia, Norwich, UK.,Dementia and Complexity in Later Life, National Health Service (NHS) Norfolk and Suffolk Foundation Trust, UK
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38
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Impact of road network structure on dementia-related missing incidents: a spatial buffer approach. Sci Rep 2020; 10:18574. [PMID: 33122727 PMCID: PMC7596503 DOI: 10.1038/s41598-020-74915-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2019] [Accepted: 09/15/2020] [Indexed: 12/25/2022] Open
Abstract
Dementia-related missing incidents are a highly prevalent issue worldwide. Despite being associated with potentially life-threatening consequences, very little is still known about what environmental risk factors may potentially contribute to these missing incidents. The aim of this study was to conduct a retrospective, observational analysis using a large sample of police case records of missing individuals with dementia (n = 210). Due to the influence that road network structure has on our real world navigation, we aimed to explore the relationship between road intersection density, intersection complexity, and orientation entropy to the dementia-related missing incidents. For each missing incident location, the above three variables were computed at a 1 km radius buffer zone around these locations; these values were then compared to that of a set of random locations. The results showed that higher road intersection density, intersection complexity, and orientation entropy were all significantly associated with dementia-related missing incidents. Our results suggest that these properties of road network structure emerge as significant environmental risk factors for dementia-related missing incidents, informing future prospective studies as well as safeguarding guidelines.
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Puthusseryppady V, Emrich-Mills L, Lowry E, Patel M, Hornberger M. Spatial Disorientation in Alzheimer's Disease: The Missing Path From Virtual Reality to Real World. Front Aging Neurosci 2020; 12:550514. [PMID: 33192453 PMCID: PMC7652847 DOI: 10.3389/fnagi.2020.550514] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Accepted: 09/16/2020] [Indexed: 01/10/2023] Open
Affiliation(s)
| | - Luke Emrich-Mills
- Research Development Programme, Norfolk and Suffolk National Health Service Foundation Trust, St Andrew's Lodge, Julian Hospital, Norwich, United Kingdom.,Institute of Cognitive Neuroscience, University College London, London, United Kingdom
| | - Ellen Lowry
- Norwich Medical School, University of East Anglia, Norwich, United Kingdom.,School of Psychology, University of East Anglia, Norwich, United Kingdom
| | - Martyn Patel
- Norwich Medical School, University of East Anglia, Norwich, United Kingdom.,Norfolk and Norwich University Hospitals National Health Service Foundation Trust, Norwich, United Kingdom
| | - Michael Hornberger
- Norwich Medical School, University of East Anglia, Norwich, United Kingdom
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40
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Ma D, Lu D, Popuri K, Wang L, Beg MF. Differential Diagnosis of Frontotemporal Dementia, Alzheimer's Disease, and Normal Aging Using a Multi-Scale Multi-Type Feature Generative Adversarial Deep Neural Network on Structural Magnetic Resonance Images. Front Neurosci 2020; 14:853. [PMID: 33192235 PMCID: PMC7643018 DOI: 10.3389/fnins.2020.00853] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 06/21/2020] [Indexed: 12/20/2022] Open
Abstract
Methods: Alzheimer's disease and Frontotemporal dementia are the first and third most common forms of dementia. Due to their similar clinical symptoms, they are easily misdiagnosed as each other even with sophisticated clinical guidelines. For disease-specific intervention and treatment, it is essential to develop a computer-aided system to improve the accuracy of their differential diagnosis. Recent advances in deep learning have delivered some of the best performance for medical image recognition tasks. However, its application to the differential diagnosis of AD and FTD pathology has not been explored. Approach: In this study, we proposed a novel deep learning based framework to distinguish between brain images of normal aging individuals and subjects with AD and FTD. Specifically, we combined the multi-scale and multi-type MRI-base image features with Generative Adversarial Network data augmentation technique to improve the differential diagnosis accuracy. Results: Each of the multi-scale, multitype, and data augmentation methods improved the ability for differential diagnosis for both AD and FTD. A 10-fold cross validation experiment performed on a large sample of 1,954 images using the proposed framework achieved a high overall accuracy of 88.28%. Conclusions: The salient contributions of this study are three-fold: (1) our experiments demonstrate that the combination of multiple structural features extracted at different scales with our proposed deep neural network yields superior performance than individual features; (2) we show that the use of Generative Adversarial Network for data augmentation could further improve the discriminant ability of the network regarding challenging tasks such as differentiating dementia sub-types; (3) and finally, we show that ensemble classifier strategy could make the network more robust and stable.
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Affiliation(s)
- Da Ma
- School of Engineering Science, Simon Fraser University, Burnaby, BC, Canada
| | - Donghuan Lu
- School of Engineering Science, Simon Fraser University, Burnaby, BC, Canada
- Tencent Jarvis X-Lab, Shenzhen, China
| | - Karteek Popuri
- School of Engineering Science, Simon Fraser University, Burnaby, BC, Canada
| | - Lei Wang
- Feinberg School of Medicine, Northwestern University, Chicago, IL, United States
| | - Mirza Faisal Beg
- School of Engineering Science, Simon Fraser University, Burnaby, BC, Canada
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Ng NSQ, Ward SA. Diagnosis of dementia in Australia: a narrative review of services and models of care. AUST HEALTH REV 2020; 43:415-424. [PMID: 30049298 DOI: 10.1071/ah17167] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Accepted: 03/23/2018] [Indexed: 12/28/2022]
Abstract
Objective There is an impetus for the timely diagnosis of dementia to enable optimal management of patients, carers and government resources. This is of growing importance in the setting of a rising prevalence of dementia in an aging population. The Australian Clinical Practice Guidelines and Principles of Care for People with Dementia advocate referral to comprehensive memory services for dementia diagnosis, but in practice many patients may be diagnosed in other settings. The aim of the present study was to obtain evidence of the roles, effectiveness, limitations and accessibility of current settings and services available for dementia diagnosis in Australia. Methods A literature review was performed by searching Ovid MEDLINE using the terms 'dementia' AND 'diagnosis OR detection'. In addition, articles from pertinent sources, such as Australian government reports and relevant websites (e.g. Dementia Australia) were included in the review. Results Literature was found for dementia diagnosis across general practice, hospitals, memory clinics, specialists, community, care institutions and new models. General practitioners are patients' preferred health professionals when dealing with dementia, but gaps in symptom recognition and initiation of cognitive testing lead to underdiagnosis. Hospitals are opportunistic places for dementia screening, but time constraints and acute medical issues hinder efficient dementia diagnosis. Memory clinics offer access to multidisciplinary skills, demonstrate earlier dementia diagnosis and potential cost-effectiveness, but are disadvantaged by organisational complexities. Specialists have increased confidence in diagnosing dementia than generalists, but drawbacks include long wait lists. Aged care assessment teams (ACAT) are a potential service for dementia diagnosis in the community. A multidisciplinary model for dementia diagnosis in care institutions is potentially beneficial, but is time and cost intensive. New models with technology allow dementia diagnosis in rural regions. Conclusion Memory clinics are most effective for formal dementia diagnosis, but healthcare professionals in other settings play vital roles in recognising patients with dementia and initiating investigations and referrals to appropriate services. What is known about this topic? Delays in dementia diagnosis are common, and it is unclear where majority of patients receive a diagnosis of dementia in Australia. While the Australian Clinical Practice Guidelines and Principles of Care for People with Dementia advocate referrals to services such as memory clinics for comprehensive assessment and diagnosis of dementia, such services may have limited capacity and may not be readily accessible to all. What does this paper add? This paper presents an overview of the various settings and services available for dementia diagnosis in Australia including evidence of the roles, accessibility, effectiveness and limitations of each setting. What are the implications for practitioners? This concerns a disease that is highly prevalent and escalating, and highlights the roles for practitioners in various settings including general practices, acute hospitals, specialist clinics, community and nursing homes. In particular, it discusses the potential roles, advantages and challenges of dementia diagnosis in each setting.
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Affiliation(s)
- Natalie Su Quin Ng
- Department of Rehabilitation and Aged Care Services, The Kingston Centre, Monash Health, 400 Warrigal Road, Cheltenham, Vic. 3192, Australia
| | - Stephanie Alison Ward
- Monash Ageing Research Centre (MONARC), Department of Epidemiology and Preventive Medicine, Monash University, The Kingston Centre, 400 Warrigal Rd, Cheltenham, Vic. 3192, Australia
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Majer R, Adeyi O, Bagoly Z, Simon V, Csiba L, Kardos L, Hortobágyi T, Frecska E. Neuropsychiatric symptoms, quality of life and caregivers' burden in dementia. Open Med (Wars) 2020; 15:905-914. [PMID: 33336048 PMCID: PMC7718626 DOI: 10.1515/med-2020-0124] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 08/20/2020] [Accepted: 08/25/2020] [Indexed: 11/26/2022] Open
Abstract
The objective of this research is to identify the relationship between the neuropsychiatric symptoms (NPSs) of patients with major neurocognitive disorder (mNCD), their quality of life, illness intrusiveness and the caregiver’s burden. We assessed 131 patients with mNCD. Examination methods included WHO well-being index short version, illness intrusiveness rating scale, Alzheimer’s Disease Assessment Scale-Cog, Mini Mental State Examination and neuropsychiatric inventory. The results were analysed using standard statistical tests. In our sample, the prevalence of NPSs is 100%. A significant correlation (p < 0.0001) was observed with quality of life and illness intrusiveness. Additionally, a strong relationship was observed between NPSs and the caregiver’s burden (r = 0.9). The result is significantly twice as much stronger in comparison to the relationship between NPS and cognitive symptoms (r = 0.4). This is the first study in Hungary to assess the impact of NPS on the burden of relatives and quality of life. NPS had twice stronger impact on caregivers’ burden than cognitive decline. However, further studies are needed to assess the sub-syndromes in mNCD in relation to NPS.
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Affiliation(s)
- Réka Majer
- Department of Psychiatry, Faculty of Medicine, University of Debrecen, Debrecen, Hungary.,Department of Neurology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Olar Adeyi
- Department of Neurology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Zsuzsa Bagoly
- MTA-DE Cerebrovascular and Neurodegenerative Research Group, Debrecen, Hungary.,Division of Clinical Laboratory Science, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Viktória Simon
- Department of Psychiatry and Psychotherapy, Faculty of Medicine, Semmelweis University, Budapest, Hungary
| | - László Csiba
- Department of Neurology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary.,MTA-DE Cerebrovascular and Neurodegenerative Research Group, Debrecen, Hungary
| | - László Kardos
- Hygiene and Infection Control Services, Kenézy Gyula University Hospital, University of Debrecen, Debrecen, Hungary
| | - Tibor Hortobágyi
- Department of Neurology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary.,Department of Pathology, Faculty of Medicine, University of Szeged, Szeged, Hungary.,Department of Old Age Psychiatry, Institute of Psychiatry Psychology & Neuroscience, King's College London, London, United Kingdom
| | - Ede Frecska
- Department of Psychiatry, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
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43
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Ahmed A, Ghallab EH, Shehata M, Zekri ARN, Ahmed OS. Impact of nano-conjugate on Drosophila for early diagnosis of Alzheimer's disease. NANOTECHNOLOGY 2020; 31:365102. [PMID: 32045897 DOI: 10.1088/1361-6528/ab7535] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Alzheimer's disease (AD) is an irreversible neurodegenerative disease. Recent identification of AD biomarkers has led to the diagnosis of AD before the onset of dementia. It has been shown that Drosophila melanogaster is a valuable model for studying human neurodegeneration, including AD. According to its properties, curcumin shows promising potential for the diagnosis of AD. In order to improve its use, new formulations, including nanotechnology-based delivery systems, have been applied. The current study aims to diagnose AD by detecting the accumulation of amyloid beta-peptide via carbon-dot-curcumin nanoparticle conjugation in Drosophila. The accumulation of amyloid beta-peptide has been detected via the conjugate using the fluorescence imaging technique. These results suggest that carbon-dot-curcumin nanoparticle conjugation could be used as a diagnostic tool for AD.
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Affiliation(s)
- Aya Ahmed
- Molecular Virology and Immunology Unit, Cancer Biology Department, National Cancer Institute, Cairo University, Kasr Al-Ainist., Fom El-Khaleeg, Cairo 11976, Egypt
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44
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Dong K, Fernando WMADB, Durham R, Stockmann R, W. Jayatunga DP, Jayasena V. A role of sea buckthorn on Alzheimer’s disease. Int J Food Sci Technol 2020. [DOI: 10.1111/ijfs.14571] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Ke Dong
- School of Science and Health Western Sydney University Locked Bag 1797 Penrith NSW 2751 Australia
| | - Warnakulasuriya M. A. D. Binosha Fernando
- Centre of Excellence for Alzheimer's Disease Research and Care School of Medical and Health Sciences Edith Cowan University Joondalup WA 6027 Australia
- Australian Alzheimer’s Research Foundation Ralph and Patricia Sarich Neuroscience Research Institute 8 Verdun Street Nedlands WA 6009 Australia
| | - Rosalie Durham
- School of Science and Health Western Sydney University Locked Bag 1797 Penrith NSW 2751 Australia
| | - Regine Stockmann
- CSIRO Agriculture and Food 671 Sneydes Rd. Werribee Vic. 3030 Australia
| | - Dona Pamoda W. Jayatunga
- Centre of Excellence for Alzheimer's Disease Research and Care School of Medical and Health Sciences Edith Cowan University Joondalup WA 6027 Australia
- Australian Alzheimer’s Research Foundation Ralph and Patricia Sarich Neuroscience Research Institute 8 Verdun Street Nedlands WA 6009 Australia
| | - Vijay Jayasena
- School of Science and Health Western Sydney University Locked Bag 1797 Penrith NSW 2751 Australia
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45
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Liu H, Temel Y, Boonstra J, Hescham S. The effect of fornix deep brain stimulation in brain diseases. Cell Mol Life Sci 2020; 77:3279-3291. [PMID: 31974655 PMCID: PMC7426306 DOI: 10.1007/s00018-020-03456-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 11/17/2019] [Accepted: 01/08/2020] [Indexed: 01/02/2023]
Abstract
Deep brain stimulation is used to alleviate symptoms of neurological and psychiatric disorders including Parkinson's disease, epilepsy, and obsessive-compulsive-disorder. Electrically stimulating limbic structures has been of great interest, and in particular, the region of the fornix. We conducted a systematic search for studies that reported clinical and preclinical outcomes of deep brain stimulation within the fornix up to July 2019. We identified 13 studies (7 clinical, 6 preclinical) that examined the effects of fornix stimulation in Alzheimer's disease (n = 9), traumatic brain injury (n = 2), Rett syndrome (n = 1), and temporal lobe epilepsy (n = 1). Overall, fornix stimulation can lead to decreased rates of cognitive decline (in humans), enhanced memory (in humans and animals), visuo-spatial memorization (in humans and animals), and improving verbal recollection (in humans). While the exact mechanisms of action are not completely understood, studies suggest fornix DBS to be involved with increased functional connectivity and neurotransmitter levels, as well as enhanced neuroplasticity.
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Affiliation(s)
- Huajie Liu
- Department of Neurosurgery, Maastricht University Medical Center, PO Box 5800, 6202 AZ, Maastricht, The Netherlands
- European Graduate School of Neuroscience (EURON), Maastricht University, Maastricht, The Netherlands
| | - Yasin Temel
- Department of Neurosurgery, Maastricht University Medical Center, PO Box 5800, 6202 AZ, Maastricht, The Netherlands
- European Graduate School of Neuroscience (EURON), Maastricht University, Maastricht, The Netherlands
| | - Jackson Boonstra
- Department of Neurosurgery, Maastricht University Medical Center, PO Box 5800, 6202 AZ, Maastricht, The Netherlands
- European Graduate School of Neuroscience (EURON), Maastricht University, Maastricht, The Netherlands
| | - Sarah Hescham
- Department of Neurosurgery, Maastricht University Medical Center, PO Box 5800, 6202 AZ, Maastricht, The Netherlands.
- European Graduate School of Neuroscience (EURON), Maastricht University, Maastricht, The Netherlands.
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46
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Weidling IW, Swerdlow RH. Mitochondria in Alzheimer's disease and their potential role in Alzheimer's proteostasis. Exp Neurol 2020; 330:113321. [PMID: 32339611 PMCID: PMC7282957 DOI: 10.1016/j.expneurol.2020.113321] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Revised: 04/10/2020] [Accepted: 04/17/2020] [Indexed: 12/12/2022]
Abstract
Alzheimer's disease (AD) is a progressive brain disorder characterized by memory loss and the accumulation of two insoluble protein aggregates, tau neurofibrillary tangles and beta-amyloid plaques. Widespread mitochondrial dysfunction also occurs and mitochondria from AD patients display changes in number, ultrastructure, and enzyme activities. Mitochondrial dysfunction in AD presumably links in some way to its other disease characteristics, either as a cause or consequence. This review characterizes AD-associated mitochondrial perturbations and considers their position in its pathologic hierarchy. It focuses on the crosstalk that occurs between mitochondria, nuclear gene expression, and cytosolic signaling pathways that serves to maintain cell homeostasis. To this point, recent evidence indicates mitochondria trigger retrograde responses that influence cell proteostasis in general and AD proteostasis specifically. Potentially pertinent retrograde responses include the mitochondrial unfolded protein response (mtUPR), integrated stress response (ISR), autophagy/mitophagy, and proteasome function. A fuller perspective of mitochondrial dysfunction in AD, and its relation to protein aggregation, could enhance our overall understanding of this disease.
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Affiliation(s)
- Ian W Weidling
- University of Kansas Alzheimer's Disease Center, University of Kansas Medical Center, Kansas City, KS, USA
| | - Russell H Swerdlow
- University of Kansas Alzheimer's Disease Center, University of Kansas Medical Center, Kansas City, KS, USA.
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47
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Kabir MT, Uddin MS, Setu JR, Ashraf GM, Bin-Jumah MN, Abdel-Daim MM. Exploring the Role of PSEN Mutations in the Pathogenesis of Alzheimer's Disease. Neurotox Res 2020; 38:833-849. [PMID: 32556937 DOI: 10.1007/s12640-020-00232-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 05/24/2020] [Accepted: 05/28/2020] [Indexed: 12/25/2022]
Abstract
Alzheimer's disease (AD) is the most common cause of dementia. Mutations of presenilin (PSEN) genes that encode presenilin proteins have been found as the vital causal factors for early-onset familial AD (FAD). AD pathological features such as memory loss, synaptic dysfunction, and formation of plaques have been successfully mimicked in the transgenic mouse models that coexpress FAD-related presenilin and amyloid precursor protein (APP) variants. γ-Secretase (GS) is an enzyme that plays roles in catalyzing intramembranous APP proteolysis to release pathogenic amyloid beta (Aβ). It has been found that presenilins can play a role as the GS's catalytic subunit. FAD-related mutations in presenilins can modify the site of GS cleavage in a way that can elevate the production of longer and highly fibrillogenic Aβ. Presenilins can interact with β-catenin to generate presenilin complexes. Aforesaid interactions have also been studied to observe the mutational and physiological activities in the catenin signal transduction pathway. Along with APP, GS can catalyze intramembrane proteolysis of various substrates that play a vital role in synaptic function. PSEN mutations can cause FAD with autosomal dominant inheritance and early onset of the disease. In this article, we have reviewed the current progress in the analysis of PSENs and the correlation of PSEN mutations and AD pathogenesis.
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Affiliation(s)
| | - Md Sahab Uddin
- Department of Pharmacy, Southeast University, Dhaka, Bangladesh. .,Pharmakon Neuroscience Research Network, Dhaka, Bangladesh.
| | | | - Ghulam Md Ashraf
- King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia.,Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - May N Bin-Jumah
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, 11474, Saudi Arabia
| | - Mohamed M Abdel-Daim
- Department of Zoology, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia.,Pharmacology Department, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, 41522, Egypt
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Tortajada-Soler M, Sánchez-Valdeón L, Blanco-Nistal M, Benítez-Andrades JA, Liébana-Presa C, Bayón-Darkistade E. Prevalence of Comorbidities in Individuals Diagnosed and Undiagnosed with Alzheimer's Disease in León, Spain and a Proposal for Contingency Procedures to Follow in the Case of Emergencies Involving People with Alzheimer's Disease. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:E3398. [PMID: 32414124 PMCID: PMC7277451 DOI: 10.3390/ijerph17103398] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 05/09/2020] [Accepted: 05/12/2020] [Indexed: 12/22/2022]
Abstract
Background: Alzheimer's disease (AD) which is the most common type of dementia is characterized by mental or cognitive disorders. People suffering with this condition find it inherently difficult to communicate and describe symptoms. As a consequence, both detection and treatment of comorbidities associated with Alzheimer's disease are substantially impaired. Equally, action protocols in the case of emergencies must be clearly formulated and stated. Methods: We performed a bibliography search followed by an observational and cross-sectional study involving a thorough review of medical records. A group of AD patients was compared with a control group. Each group consisted of 100 people and were all León residents aged ≥65 years. Results: The following comorbidities were found to be associated with AD: cataracts, urinary incontinence, osteoarthritis, hearing loss, osteoporosis, and personality disorders. The most frequent comorbidities in the control group were the following: eye strain, stroke, vertigo, as well as circulatory and respiratory disorders. Comorbidities with a similar incidence in both groups included type 2 diabetes mellitus, glaucoma, depression, obesity, arthritis, and anxiety. We also reviewed emergency procedures employed in the case of an emergency involving an AD patient. Conclusions: Some comorbidities were present in both the AD and control groups, while others were found in the AD group and not in the control group, and vice versa.
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Affiliation(s)
- Macrina Tortajada-Soler
- Facultad de Ciencias de la Salud, Campus de Vegazana, Universidad de León, s/n, C.P. 24071 León, Spain;
| | - Leticia Sánchez-Valdeón
- SALBIS Research Group, Facultad de Ciencias de la Salud, Campus de Ponferrada, Universidad de León, Avda/ Astorga s/n, C.P. 24402 Ponferrada (León), Spain; (C.L.-P.); (E.B.-D.)
| | - Marta Blanco-Nistal
- Complejo Asistencial Universitario de León, C/ Altos de nava s/n, C.P. 24001 León, Spain;
| | - José Alberto Benítez-Andrades
- SALBIS Research Group, Department of Electric, Systems and Automatics Engineering, University of León, s/n, 24071 León, Spain;
| | - Cristina Liébana-Presa
- SALBIS Research Group, Facultad de Ciencias de la Salud, Campus de Ponferrada, Universidad de León, Avda/ Astorga s/n, C.P. 24402 Ponferrada (León), Spain; (C.L.-P.); (E.B.-D.)
| | - Enrique Bayón-Darkistade
- SALBIS Research Group, Facultad de Ciencias de la Salud, Campus de Ponferrada, Universidad de León, Avda/ Astorga s/n, C.P. 24402 Ponferrada (León), Spain; (C.L.-P.); (E.B.-D.)
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49
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Wang YY, Yu SF, Xue HY, Li Y, Zhao C, Jin YH. Effectiveness and Safety of Acupuncture for the Treatment of Alzheimer's Disease: A Systematic Review and Meta-Analysis. Front Aging Neurosci 2020; 12:98. [PMID: 32435187 PMCID: PMC7218057 DOI: 10.3389/fnagi.2020.00098] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 03/23/2020] [Indexed: 12/31/2022] Open
Abstract
Background: The effects of acupuncture on Alzheimer's disease (AD) outcomes remain controversial. The aim of this review was to evaluate the effectiveness and safety of acupuncture for the treatment of AD. Methods: PubMed, Embase, Web of Science, the Cochrane Central Register of Controlled Trials, Chinese BioMedical Literature Database, VIP Database for Chinese Technical Periodicals, China National Knowledge Infrastructure, and Wanfang Data were searched to identify relevant randomized controlled trials from inception to January 19, 2019. Data were extracted and evaluated by two authors independently. The data analysis was conducted using R (version 3.6.0) and RStudio (version 1.2.1335) software. Results: Thirty trials involving 2,045 patients were included. Acupuncture plus drug therapy may have been more beneficial for general cognitive function in AD patients than drug therapy alone (short-term treatment: MD, mean difference = 1.94, 95% CI: 1.11, 2.77; p < 0.01; medium-term treatment: MD = 4.41, 95% CI: 1.83, 7.00; p < 0.01). People who received acupuncture plus drug therapy attained higher ADL (Activities of Daily Living) scores than patients who received drug therapy alone for medium-term treatment duration (MD = −2.14; 95% CI: −3.69, −0.59; p < 0.01). However, there is no statistically significant difference in subgroup effect on MMSE (Mini-mental Status Examination) and ADLs (p > 0.05) when comparing acupuncture treatment with drug therapy (such as Donepezil hydrochloride, Nimodipine, or Yizhijiannao), or acupuncture plus drug therapy (such as Donepezil hydrochloride, Dangguishaoyaosan, or Jiannaosan) with drug therapy alone. There was also no significant difference in general cognitive function, ADLs, or incidence of adverse events between acupuncture treatment and drug therapy (p > 0.05). Conclusions: This review indicates that acupuncture plus drug therapy may have a more beneficial effect for AD patients than drug therapy alone on general cognitive function in the short and medium term and on ADLs in the medium term. Acupuncture alone may not have superior effects compared with drug therapy on global cognitive function, ADLs, and incidence of adverse events. Duration of treatment may not modify the effect of acupuncture in comparison with drug therapy. Additional large-scale and high-quality clinical trials are needed.
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Affiliation(s)
- Yun-Yun Wang
- Center for Evidence-Based and Translational Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China.,Center for Evidence-Based and Translational Medicine, Wuhan University, Wuhan, China
| | - Shao-Fu Yu
- Department of Clinical Pharmacy, The Second People's Hospital of Huaihua, Huaihua, China
| | - Hong-Yang Xue
- Medical Department of Wuhan University, Wuhan, China
| | - Yang Li
- Center for Evidence-Based and Translational Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China.,Center for Evidence-Based and Translational Medicine, Wuhan University, Wuhan, China
| | - Chen Zhao
- Institute of Basic Research in Clinical Medicine, China Academy of Chinese Medical Sciences, Beijing, China
| | - Ying-Hui Jin
- Center for Evidence-Based and Translational Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China.,Department of Clinical Pharmacy, The Second People's Hospital of Huaihua, Huaihua, China
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50
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Assaf N, El-Shamarka ME, Salem NA, Khadrawy YA, El Sayed NS. Neuroprotective effect of PPAR alpha and gamma agonists in a mouse model of amyloidogenesis through modulation of the Wnt/beta catenin pathway via targeting alpha- and beta-secretases. Prog Neuropsychopharmacol Biol Psychiatry 2020; 97:109793. [PMID: 31669201 DOI: 10.1016/j.pnpbp.2019.109793] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 10/11/2019] [Accepted: 10/17/2019] [Indexed: 12/11/2022]
Abstract
The present study was conducted to evaluate the efficacy of fenofibrate and pioglitazone in a mouse model of amyloidogenesis induced by amyloidβ (βA) peptide. Mice were injected intracerebroventricularly with βA1-40 (400 pmol/mouse) once, followed by treatment with fenofibrate (300 mg/kg), pioglitazone (30 mg/kg),or both. After 21 days of daily treatment, memory impairment and cognitive function were evaluated by Morris water maze (MWM), Y-maze and object recognition tests. On the 22nd day, mice were sacrificed, and their hippocampi were dissected to determine the levels of α- and β-secretase, peroxisome proliferator-activated receptor (PPARα and β), Wnt and β-catenin. Significant memory impairment and cognitive dysfunction were observed in the mouse model group. This finding was associated with a significant increase in α- and β-secretase levels and a significant decrease in Wnt, β-catenin, and PPARα and β levels. Neuronal damage was also evident after histopathological examination. Treatment with fenofibrate, pioglitazone and their combination resulted in a significant improvement in the behavioural and neurochemical changes induced by βA injection. The present findings indicate that the combined administration of fenofibrate and pioglitazone was more effective than monotherapy in ameliorating the behavioural, neurochemical and histopathological changes in amyloidogenesis model mice and provide a promising therapeutic approach in the management of Alzheimer's disease complicated by diabetes and hypercholesterolemia.
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Affiliation(s)
- Naglaa Assaf
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Misr University for Science and Technology, Cairo, Egypt
| | - Marwa E El-Shamarka
- Department of Narcotics, Ergogenic Aids and Poisons, Medical Research Division, National Research Centre, Giza, Egypt
| | - Neveen A Salem
- Department of Narcotics, Ergogenic Aids and Poisons, Medical Research Division, National Research Centre, Giza, Egypt; Department of Biochemistry, Faculty of Science, University of Jeddah, Jeddah, Saudi Arabia
| | - Yasser A Khadrawy
- Department of Medical Physiology, Medical Research Division, National Research Centre, Egypt
| | - Nesrine S El Sayed
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Egypt.
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