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Xu T, Mei X, Zhao Z, Liu YH, Zheng CY. Effectiveness of anti-psychiatric treatment on visual and haptic perceptual disorder for a patient with Alzheimer’s disease: A case report. World J Psychiatry 2024; 14:1404-1410. [DOI: 10.5498/wjp.v14.i9.1404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 08/22/2024] [Accepted: 08/30/2024] [Indexed: 09/11/2024] Open
Abstract
BACKGROUND Perception is frequently impaired in patients with Alzheimer’s disease (AD). Several patients exhibit visual or haptic hallucinations.
CASE SUMMARY A 71-year-old Chinese man presented with visual and haptic hallucinations he had been experiencing for 2 weeks. The clinical manifestations were the feeling of insects crawling and biting the limbs and geison. He looked for the insects while itching and scratching, which led to skin breakage on the limbs. He was treated with topical and anti-allergic drugs in several dermatology departments without any significant improvement. After admission, the patient was administered risperidone (0.5 mg) and duloxetine (2 mg/day). One week later, the dose of risperidone was increased to 2 mg/day, and that of duloxetine was increased to 60 mg/day. After 2 weeks of treatment, the patient’s sensation of insects crawling and biting disappeared, and his mood stabilized.
CONCLUSION This patient manifested psychiatric behavioral symptoms caused by AD brain atrophy. It was important to re-evaluate the patient’s cognitive-psychological status when the patient repeatedly went to the hospital for treatment. Follow-up attention to cognitive function and the consideration of perceptual deficits as early manifestations of AD should be considered.
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Affiliation(s)
- Ting Xu
- Department of Psychiatry, Affiliated Kangning Hospital of Ningbo University, Ningbo 315201, Zhejiang Province, China
| | - Xi Mei
- Department of Psychiatry, Affiliated Kangning Hospital of Ningbo University, Ningbo 315201, Zhejiang Province, China
| | - Zheng Zhao
- Department of Psychiatry, Affiliated Kangning Hospital of Ningbo University, Ningbo 315201, Zhejiang Province, China
| | - Yue-Hong Liu
- Department of Psychiatry, Affiliated Kangning Hospital of Ningbo University, Ningbo 315201, Zhejiang Province, China
| | - Cheng-Ying Zheng
- Department of Psychiatry, Affiliated Kangning Hospital of Ningbo University, Ningbo 315201, Zhejiang Province, China
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Xu D, Chen B, Yang M, Lin G, Zhang M, Wu Z, Zhou H, Shi X, Peng Q, Zeng Y, Lao J, Wang Q, Liang S, Li J, Yao K, Liu Q, Ou Y, Zhong X, Ning Y. Odor identification dysfunction in late-life depression with suicidal ideation. J Affect Disord 2024:S0165-0327(24)01464-2. [PMID: 39233243 DOI: 10.1016/j.jad.2024.08.227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2024] [Revised: 08/26/2024] [Accepted: 08/31/2024] [Indexed: 09/06/2024]
Abstract
BACKGROUND Suicide is more prevalent among older adults compared to younger individuals. Late-life depression (LLD) poses the highest risk for suicide. However, early recognition of suicidal ideation is challenging. Dysfunction in odor identification (OI), a characteristic of LLD, may hold potential for early identification of suicidal ideation. This study aims to compare OI between LLD patients with suicidal ideation (LLD-S) and LLD patients without suicidal ideation (LLD-NS), and examine its relationship with cognitive function. METHODS A total of 262 LLD-NS patients, 63 LLD-S patients, and 316 healthy normal older adults (HOAs) underwent OI testing, standardized clinical interviews, and comprehensive neuropsychological assessments. RESULTS (1) LLD-S patients exhibited lower OI scores and poorer cognitive performance (including global cognition, information processing speed, memory, language, executive function, and visuospatial ability) compared to LLD-NS patients and HOAs. (2) There were interactive effects between suicidal ideation and OI dysfunction, leading to lower scores in information processing speed and visuospatial ability. (3) OI dysfunction mediated the differences in cognition between the LLD-NS and LLD-S groups. LIMITATIONS The present study was a cross-sectional design. CONCLUSIONS LLD-S patients had worse odor identification than LLD-NS patients and HOAs, suggesting that OI testing could be a valuable approach for identifying suicidal ideation in LLD and screening for suicide risk. The presence of both OI impairment and suicidal ideation was associated with poorer cognitive performance in LLD.
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Affiliation(s)
- Danyan Xu
- The first School of Clinical Medicine, Southern Medical University, Guangzhou, Guangdong Province, China; Geriatric Neuroscience Center, the Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou, Guangdong Province, China
| | - Ben Chen
- Geriatric Neuroscience Center, the Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou, Guangdong Province, China
| | - Mingfeng Yang
- Geriatric Neuroscience Center, the Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou, Guangdong Province, China
| | - Gaohong Lin
- Geriatric Neuroscience Center, the Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou, Guangdong Province, China
| | - Min Zhang
- Geriatric Neuroscience Center, the Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou, Guangdong Province, China
| | - Zhangying Wu
- Geriatric Neuroscience Center, the Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou, Guangdong Province, China
| | - Huarong Zhou
- Geriatric Neuroscience Center, the Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou, Guangdong Province, China
| | - Xiaolei Shi
- Geriatric Neuroscience Center, the Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou, Guangdong Province, China.
| | - Qi Peng
- Geriatric Neuroscience Center, the Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou, Guangdong Province, China
| | - Yijie Zeng
- Geriatric Neuroscience Center, the Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou, Guangdong Province, China
| | - Jingyi Lao
- Geriatric Neuroscience Center, the Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou, Guangdong Province, China
| | - Qiang Wang
- Geriatric Neuroscience Center, the Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou, Guangdong Province, China
| | - Shuang Liang
- Geriatric Neuroscience Center, the Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou, Guangdong Province, China
| | - Jiafu Li
- Geriatric Neuroscience Center, the Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou, Guangdong Province, China.
| | - Kexin Yao
- Geriatric Neuroscience Center, the Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou, Guangdong Province, China
| | - Qin Liu
- The first School of Clinical Medicine, Southern Medical University, Guangzhou, Guangdong Province, China; Geriatric Neuroscience Center, the Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou, Guangdong Province, China
| | - Yanhong Ou
- Guangzhou Medical University, Guangzhou, China
| | - Xiaomei Zhong
- Geriatric Neuroscience Center, the Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou, Guangdong Province, China.
| | - Yuping Ning
- The first School of Clinical Medicine, Southern Medical University, Guangzhou, Guangdong Province, China; Geriatric Neuroscience Center, the Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou, Guangdong Province, China; Guangdong Engineering Technology Research Center for Translational Medicine of Mental Disorders, Guangzhou, China; Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Guangzhou Medical University, Guangzhou, China.
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Bobkova NV, Chuvakova LN, Kovalev VI, Zhdanova DY, Chaplygina AV, Rezvykh AP, Evgen'ev MB. A Mouse Model of Sporadic Alzheimer's Disease with Elements of Major Depression. Mol Neurobiol 2024:10.1007/s12035-024-04346-7. [PMID: 38980563 DOI: 10.1007/s12035-024-04346-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 07/02/2024] [Indexed: 07/10/2024]
Abstract
After olfactory bulbectomy, animals are often used as a model of major depression or sporadic Alzheimer's disease and, hence, the status of this model is still disputable. To elucidate the nature of alterations in the expression of the genome after the operation, we analyzed transcriptomes of the cortex, hippocampus, and cerebellum of the olfactory bulbectomized (OBX) mice. Analysis of the functional significance of genes in the brain of OBX mice indicates that the balance of the GABA/glutamatergic systems is disturbed with hyperactivation of the latter in the hippocampus, leading to the development of excitotoxicity and induction of apoptosis in the background of severe mitochondrial dysfunction and astrogliosis. On top of this, the synthesis of neurotrophic factors decreases leading to the disruption of the cytoskeleton of neurons, an increase in the level of intracellular calcium, and the activation of tau protein hyperphosphorylation. Moreover, the acetylcholinergic system is deficient in the background of the hyperactivation of acetylcholinesterase. Importantly, the activity of the dopaminergic, endorphin, and opiate systems in OBX mice decreases, leading to hormonal dysfunction. On the other hand, genes responsible for the regulation of circadian rhythms, cell migration, and innate immunity are activated in OBX animals. All this takes place in the background of a drastic downregulation of ribosomal protein genes in the brain. The obtained results indicate that OBX mice represent a model of Alzheimer's disease with elements of major depression.
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Affiliation(s)
- N V Bobkova
- Institute of Cell Biophysics of the Russian Academy of Sciences-Federal Research Center, Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, 142290, Pushchino, Moscow Region, Russia
| | - L N Chuvakova
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991, Moscow, Russia
| | - V I Kovalev
- Institute of Cell Biophysics of the Russian Academy of Sciences-Federal Research Center, Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, 142290, Pushchino, Moscow Region, Russia
| | - D Y Zhdanova
- Institute of Cell Biophysics of the Russian Academy of Sciences-Federal Research Center, Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, 142290, Pushchino, Moscow Region, Russia
| | - A V Chaplygina
- Institute of Cell Biophysics of the Russian Academy of Sciences-Federal Research Center, Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, 142290, Pushchino, Moscow Region, Russia
| | - A P Rezvykh
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991, Moscow, Russia
| | - M B Evgen'ev
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991, Moscow, Russia.
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Kalam S, Numbers K, Lipnicki DM, Lam BCP, Brodaty H, Reppermund S. The combination of olfactory dysfunction and depression increases the risk of incident dementia in older adults. Int Psychogeriatr 2024; 36:130-141. [PMID: 37264675 DOI: 10.1017/s1041610223000480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
OBJECTIVES Olfactory dysfunction and depression are common in later life, and both have been presented as risk factors for dementia. Our purpose was to investigate the associations between these two risk factors and determine if they had an additive effect on dementia risk. DESIGN Olfactory function was assessed using the Brief Smell Identification Test (BSIT), and depression was classified using a combination of the 15-item Geriatric Depression Scale (GDS) score and current antidepressant use. Cross-sectional associations between depression and olfactory function were examined using correlations. Cox regression analyses were conducted to examine the longitudinal relationship between olfaction and depression and incident dementia across 12-years of follow-up. PARTICIPANTS Participants were 780 older adults (aged 70-90 years; 56.5% female) from the Sydney Memory and Ageing Study (MAS) without a diagnosis of dementia at baseline. RESULTS Partial correlation revealed a nonsignificant association between baseline depression and olfactory function after accounting for covariates (r = -.051, p = .173). Cox regression showed that depression at baseline (hazard ratio = 1.706, 95% CI 1.185-2.456, p = .004) and lower BSIT scores (HR = .845, 95%CI .789-.905, p < .001) were independently associated with a higher risk of incident dementia across 12 years. Entering both predictors together improved the overall predictive power of the model. CONCLUSIONS Lower olfactory identification scores and depressive symptoms predict incident dementia over 12 years. The use of BSIT scores and depression in conjunction provides a greater ability to predict dementia than either used alone. Assessment of olfactory function and depression screening may provide clinical utility in the early detection of dementia.
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Affiliation(s)
- Shafi Kalam
- Centre for Healthy Brain Ageing (CHeBA), Discipline of Psychiatry & Mental Health, School of Clinical Medicine, Faculty of Medicine & Health, University of New South Wales, Sydney, NSW, Australia
| | - Katya Numbers
- Centre for Healthy Brain Ageing (CHeBA), Discipline of Psychiatry & Mental Health, School of Clinical Medicine, Faculty of Medicine & Health, University of New South Wales, Sydney, NSW, Australia
| | - Darren M Lipnicki
- Centre for Healthy Brain Ageing (CHeBA), Discipline of Psychiatry & Mental Health, School of Clinical Medicine, Faculty of Medicine & Health, University of New South Wales, Sydney, NSW, Australia
| | - Ben C P Lam
- Centre for Healthy Brain Ageing (CHeBA), Discipline of Psychiatry & Mental Health, School of Clinical Medicine, Faculty of Medicine & Health, University of New South Wales, Sydney, NSW, Australia
- School of Psychology and Public Health, La Trobe University, VIC, Australia
| | - Henry Brodaty
- Centre for Healthy Brain Ageing (CHeBA), Discipline of Psychiatry & Mental Health, School of Clinical Medicine, Faculty of Medicine & Health, University of New South Wales, Sydney, NSW, Australia
| | - Simone Reppermund
- Centre for Healthy Brain Ageing (CHeBA), Discipline of Psychiatry & Mental Health, School of Clinical Medicine, Faculty of Medicine & Health, University of New South Wales, Sydney, NSW, Australia
- Department of Developmental Disability Neuropsychiatry (3DN), Discipline of Psychiatry & Mental Health, School of Clinical Medicine, Faculty of Medicine & Health, University of New South Wales, Sydney, NSW, Australia
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Liu S, Jiang Z, Zhao J, Li Z, Li R, Qiu Y, Peng H. Disparity of smell tests in Alzheimer's disease and other neurodegenerative disorders: a systematic review and meta-analysis. Front Aging Neurosci 2023; 15:1249512. [PMID: 37744388 PMCID: PMC10512741 DOI: 10.3389/fnagi.2023.1249512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 08/21/2023] [Indexed: 09/26/2023] Open
Abstract
Background There are discrepancies of olfactory impairment between Alzheimer's disease (AD) and other neurodegenerative disorders. Olfactory deficits may be a potential marker for early and differential diagnosis of AD. We aimed to assess olfactory functions in patients with AD and other neurodegenerative disorders, to further evaluate the smell tests using subgroup analysis, and to explore moderating factors affecting olfactory performance. Methods Cross-sectional studies relating to olfactory assessment for both AD and other neurodegenerative disorders published before 27 July 2022 in English, were searched on PubMed, Embase and Cochrane. After literature screening and quality assessment, meta-analyses were conducted using stata14.0 software. Results Forty-two articles involving 12 smell tests that evaluated 2,569 AD patients were included. It was revealed that smell tests could distinguish AD from mild cognitive impairment (MCI), Lewy body disease (LBD), depression, and vascular dementia (VaD), but not from diseases such as frontotemporal dementia (FTD). Our finding indicated that in discriminating AD from MCI, the University of Pennsylvania Smell Identification Test (UPSIT) was most frequently used (95%CI: -1.12 to -0.89), while the Brief Smell Identification Test (B-SIT), was the most widely used method in AD vs. LBD group. Further subgroup analyses indicated that the methods of smell test used contributed to the heterogeneity in olfactory threshold and discrimination scores in group AD vs. MCI. While the moderating variables including age, MMSE scores, education years in AD vs. LBD, were account for heterogeneity across studies. Conclusion Our finding suggests smell tests have potential value in early differential diagnosis of AD. UPSIT and its simplified variant, B-SIT, are widely used methods in the analyses. Systematic Review Registration https://www.crd.york.ac.uk/PROSPERO/display_record.php? RecordID = 357970 (PROSPERO, registration number CRD42022357970).
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Affiliation(s)
- Silin Liu
- Department of Otolaryngology Head and Neck Surgery, General Hospital of Southern Theater Command, Guangzhou, China
- The First School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Zhihui Jiang
- Department of Pharmacy, General Hospital of Southern Theater Command, Guangzhou, China
- School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, China
| | - Jing Zhao
- Department of Otolaryngology Head and Neck Surgery, General Hospital of Southern Theater Command, Guangzhou, China
- Graduate School, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Zhensheng Li
- Department of Neurology, General Hospital of Southern Theater Command, Guangzhou, China
| | - Ruixin Li
- The First School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Yunyi Qiu
- The First School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Hua Peng
- Department of Otolaryngology Head and Neck Surgery, General Hospital of Southern Theater Command, Guangzhou, China
- The First School of Clinical Medicine, Southern Medical University, Guangzhou, China
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Jegatheeswaran L, Gokani SA, Luke L, Klyvyte G, Espehana A, Garden EM, Tarantino A, Al Omari B, Philpott CM. Assessment of COVID-19-related olfactory dysfunction and its association with psychological, neuropsychiatric, and cognitive symptoms. Front Neurosci 2023; 17:1165329. [PMID: 37599993 PMCID: PMC10436231 DOI: 10.3389/fnins.2023.1165329] [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: 02/13/2023] [Accepted: 07/18/2023] [Indexed: 08/22/2023] Open
Abstract
Purpose of review To provide a detailed overview of the assessment of COVID-19-related olfactory dysfunction and its association with psychological, neuropsychiatric, and cognitive symptoms. Recent findings COVID-19-related olfactory dysfunction can have a detrimental impact to the quality of life of patients. Prior to the COVID-19 pandemic, olfactory and taste disorders were a common but under-rated, under-researched and under-treated sensory loss. The pandemic has exacerbated the current unmet need for accessing good healthcare for patients living with olfactory disorders and other symptoms secondary to COVID-19. This review thus explores the associations that COVID-19 has with psychological, neuropsychiatric, and cognitive symptoms, and provide a framework and rationale for the assessment of patients presenting with COVID-19 olfactory dysfunction. Summary Acute COVID-19 infection and long COVID is not solely a disease of the respiratory and vascular systems. These two conditions have strong associations with psychological, neuropsychiatric, and cognitive symptoms. A systematic approach with history taking and examination particularly with nasal endoscopy can determine the impact that this has on the patient. Specific olfactory disorder questionnaires can demonstrate the impact on quality of life, while psychophysical testing can objectively assess and monitor olfaction over time. The role of cross-sectional imaging is not yet described for COVID-19-related olfactory dysfunction. Management options are limited to conservative adjunctive measures, with some medical therapies described.
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Affiliation(s)
- Lavandan Jegatheeswaran
- Department of Ear, Nose and Throat Surgery, James Paget University Hospitals NHS Foundation Trust, Great Yarmouth, United Kingdom
| | - Shyam Ajay Gokani
- Rhinology and ENT Research Group, Norwich Medical School, University of East Anglia, Norwich, United Kingdom
| | - Louis Luke
- Department of Ear, Nose and Throat Surgery, James Paget University Hospitals NHS Foundation Trust, Great Yarmouth, United Kingdom
- Rhinology and ENT Research Group, Norwich Medical School, University of East Anglia, Norwich, United Kingdom
| | - Gabija Klyvyte
- Rhinology and ENT Research Group, Norwich Medical School, University of East Anglia, Norwich, United Kingdom
| | - Andreas Espehana
- Rhinology and ENT Research Group, Norwich Medical School, University of East Anglia, Norwich, United Kingdom
| | - Elizabeth Mairenn Garden
- Rhinology and ENT Research Group, Norwich Medical School, University of East Anglia, Norwich, United Kingdom
| | - Alessia Tarantino
- Department of Ear, Nose and Throat Surgery, James Paget University Hospitals NHS Foundation Trust, Great Yarmouth, United Kingdom
| | - Basil Al Omari
- Department of Ear, Nose and Throat Surgery, James Paget University Hospitals NHS Foundation Trust, Great Yarmouth, United Kingdom
| | - Carl Martin Philpott
- Department of Ear, Nose and Throat Surgery, James Paget University Hospitals NHS Foundation Trust, Great Yarmouth, United Kingdom
- Rhinology and ENT Research Group, Norwich Medical School, University of East Anglia, Norwich, United Kingdom
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Trapp W, Heid A, Röder S, Wimmer F, Hajak G. "Mmm, Smells like Coffee!": How a Brief Odor Identification Test Could Help to Identify People with Mild Cognitive Impairment and Dementia. Brain Sci 2023; 13:1052. [PMID: 37508984 PMCID: PMC10377169 DOI: 10.3390/brainsci13071052] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 06/26/2023] [Accepted: 07/08/2023] [Indexed: 07/30/2023] Open
Abstract
(1) Background: Dementia and mild cognitive impairment (MCI) are still underdiagnosed in the general population. Impaired odor identification has been identified as an early marker of MCI and dementia. We aimed to compare the additional diagnostic value of two odor identification tests to a cognitive screening test in detecting MCI or dementia. (2) Methods: The Sniffin' Sticks odor identification test (SS-OIT), a brief odor identification test (B-OIT) requiring the identification of coffee scent, and the Mini-Mental State Exam (MMSE) were administered to a consecutive series of 174 patients (93 with dementia, 42 with mild cognitive impairment, and 39 without cognitive impairment) referred for neuropsychological testing. (3) Results: Both participants with dementia and with MCI exhibited impairments in odor identification. The SS-OIT and the B-OIT were substantially correlated. Complementing MMSE scores with the SS-OIT or the B-OIT similarly improved the diagnostic accuracy of individuals with dementia and MCI. (4) Conclusions: People with suspected dementia or MCI may already benefit from brief odor identification tests. Although these tests require little additional time, they can notably increase sensitivity for dementia or MCI.
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Affiliation(s)
- Wolfgang Trapp
- Department of Psychiatry, Sozialstiftung Bamberg, St.-Getreu-Straße 18, 96049 Bamberg, Germany
- Department of Physiological Psychology, Otto-Friedrich University Bamberg, Markusplatz 3, 96045 Bamberg, Germany
| | - Andreas Heid
- Department of Psychiatry, Sozialstiftung Bamberg, St.-Getreu-Straße 18, 96049 Bamberg, Germany
| | - Susanne Röder
- Department of Psychiatry, Sozialstiftung Bamberg, St.-Getreu-Straße 18, 96049 Bamberg, Germany
| | - Franziska Wimmer
- Department of Psychiatry, Sozialstiftung Bamberg, St.-Getreu-Straße 18, 96049 Bamberg, Germany
| | - Göran Hajak
- Department of Psychiatry, Sozialstiftung Bamberg, St.-Getreu-Straße 18, 96049 Bamberg, Germany
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Audronyte E, Sutnikiene V, Pakulaite-Kazliene G, Kaubrys G. Olfactory memory in mild cognitive impairment and Alzheimer's disease. Front Neurol 2023; 14:1165594. [PMID: 37332995 PMCID: PMC10272592 DOI: 10.3389/fneur.2023.1165594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 05/15/2023] [Indexed: 06/20/2023] Open
Abstract
Introduction Olfaction is impaired in Alzheimer's disease (AD). However, olfactory memory has rarely been examined. As the pathogenesis of AD remains largely unknown, collecting more data regarding the occurrence and progression of its symptoms would help gain more insight into the disease. Objective To investigate olfactory memory and its relationship with verbal memory and other clinical features in patients with early-stage AD. Methods Three groups of participants were enrolled in this study: patients with mild dementia due to AD (MD-AD, N = 30), patients with mild cognitive impairment due to AD (MCI-AD, N = 30), and cognitively normal older participants (CN, N = 30). All participants underwent cognitive evaluation (Clinical Dementia Rating scale, Mini Mental State Examination, Alzheimer's Disease Assessment Scale-Cognitive Subscale, delayed verbal recall, and verbal fluency tests) and assessment of olfactory immediate and delayed recognition memory. Results Olfactory immediate and delayed recognition memory scores were significantly lower in the MD-AD group than in the MCI-AD and CN groups. The MCI-AD and CN groups did not differ significantly [in both cases, Kruskal-Wallis test, p < 0.05; post hoc analysis revealed significant differences between the MD-AD and MCI-AD groups and between the MD-AD and CN groups (p < 0.05), and no significant difference between the MCI-AD and CN groups (p > 0.05)]. Verbal immediate recall, delayed recall after 5 min, and delayed recall after 30 min scores were significantly worse in the MD-AD and MCI-AD groups than in the CN group. MD-AD and MCI-AD groups did not differ significantly [in all cases Kruskal-Wallis test, p < 0.05; post hoc analysis revealed significant differences between MD-AD and CN groups, and MCI-AD and CN groups (p < 0.05) and no significant difference between MD-AD and MCI-AD groups (p > 0.05)]. Duration of AD symptoms was a strong predictor of both immediate and delayed olfactory recognition memory scores. Conclusion Olfactory memory impairment was observed in patients with AD. The changes progress during the course of the disease. However, unlike verbal memory, olfactory memory is not significantly impaired in the prodromal stage of AD.
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Audronyte E, Pakulaite-Kazliene G, Sutnikiene V, Kaubrys G. Properties of odor identification testing in screening for early-stage Alzheimer's disease. Sci Rep 2023; 13:6075. [PMID: 37055436 PMCID: PMC10102162 DOI: 10.1038/s41598-023-32878-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 04/04/2023] [Indexed: 04/15/2023] Open
Abstract
Odor identification (OI) is impaired in the early stages of Alzheimer's disease (AD). However, data regarding the diagnostic properties of OI tests are lacking, preventing their clinical use. We aimed to explore OI and determine the accuracy of OI testing in screening for patients with early AD. In total, 30 participants with mild cognitive impairment due to AD (MCI-AD), 30 with mild dementia due to AD (MD-AD), and 30 cognitively normal elderly participants (CN) were enrolled, and cognitive examination (CDR, MMSE, ADAS-Cog 13, and verbal fluency tests) and assessment of OI (Burghart Sniffin' Sticks odor identification test) were performed. MCI-AD patients scored significantly worse in OI than CN participants, and MD-AD patients had worse OI scores than MCI-AD patients. The ratio of OI to ADAS-Cog 13 score had good diagnostic accuracy in differentiating AD patients from CN participants and in differentiating MCI-AD patients from CN participants. Substitution of ADAS-Cog 13 score with the ratio of OI to ADAS-Cog 13 score in a multinomial regression model improved the classification accuracy, especially of MCI-AD cases. Our results confirmed that OI is impaired during the prodromal stage of AD. OI testing has a good diagnostic quality and can improve the accuracy of screening for early-stage AD.
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Affiliation(s)
- Egle Audronyte
- Clinic of Neurology and Neurosurgery, Institute of Clinical Medicine, Faculty of Medicine, Vilnius University, Vilnius, Lithuania.
| | - Gyte Pakulaite-Kazliene
- Clinic of Neurology and Neurosurgery, Institute of Clinical Medicine, Faculty of Medicine, Vilnius University, Vilnius, Lithuania
| | - Vaiva Sutnikiene
- Clinic of Neurology and Neurosurgery, Institute of Clinical Medicine, Faculty of Medicine, Vilnius University, Vilnius, Lithuania
| | - Gintaras Kaubrys
- Clinic of Neurology and Neurosurgery, Institute of Clinical Medicine, Faculty of Medicine, Vilnius University, Vilnius, Lithuania
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Marin C, Alobid I, Fuentes M, López-Chacón M, Mullol J. Olfactory Dysfunction in Mental Illness. Curr Allergy Asthma Rep 2023; 23:153-164. [PMID: 36696016 PMCID: PMC9875195 DOI: 10.1007/s11882-023-01068-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/13/2023] [Indexed: 01/26/2023]
Abstract
PURPOSE OF REVIEW Olfactory dysfunction contributes to the psychopathology of mental illness. In this review, we describe the neurobiology of olfaction, and the most common olfactory alterations in several mental illnesses. We also highlight the role, hitherto underestimated, that the olfactory pathways play in the regulation of higher brain functions and its involvement in the pathophysiology of psychiatric disorders, as well as the effect of inflammation on neurogenesis as a possible mechanism involved in olfactory dysfunction in psychiatric conditions. RECENT FINDINGS The olfactory deficits present in anxiety, depression, schizophrenia or bipolar disorder consist of specific alterations of different components of the sense of smell, mainly the identification of odours, as well as the qualifications of their hedonic valence (pleasant or unpleasant). Epidemiological findings have shown that both environmental factors, such as air pollutants, and inflammatory disease of the upper respiratory tract, can contribute to an increased risk of mental illness, at least in part, due to peripheral inflammatory mechanisms of the olfactory system. In this review, we describe the neurobiology of olfaction, and the most common olfactory function alterations in several psychiatric conditions and its role as a useful symptom for the differential diagnosis. We also highlight the effect of inflammation on neurogenesis as a possible mechanism involved in olfactory dysfunction in these psychiatric conditions.
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Affiliation(s)
- Concepció Marin
- INGENIO, IRCE, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), CELLEX, Department 2B, Villarroel 170, 08036, Barcelona, Catalonia, Spain. .,Centre for Biomedical Investigation in Respiratory Diseases (CIBERES), Health Institute Carlos III, Madrid, Spain.
| | - Isam Alobid
- INGENIO, IRCE, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), CELLEX, Department 2B, Villarroel 170, 08036, Barcelona, Catalonia, Spain.,Centre for Biomedical Investigation in Respiratory Diseases (CIBERES), Health Institute Carlos III, Madrid, Spain.,Rhinology Unit and Smell Clinic, ENT Department, Hospital Clínic, Universitat de Barcelona, Barcelona, Catalonia, Spain
| | - Mireya Fuentes
- INGENIO, IRCE, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), CELLEX, Department 2B, Villarroel 170, 08036, Barcelona, Catalonia, Spain.,Centre for Biomedical Investigation in Respiratory Diseases (CIBERES), Health Institute Carlos III, Madrid, Spain
| | - Mauricio López-Chacón
- INGENIO, IRCE, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), CELLEX, Department 2B, Villarroel 170, 08036, Barcelona, Catalonia, Spain.,Centre for Biomedical Investigation in Respiratory Diseases (CIBERES), Health Institute Carlos III, Madrid, Spain.,Rhinology Unit and Smell Clinic, ENT Department, Hospital Clínic, Universitat de Barcelona, Barcelona, Catalonia, Spain
| | - Joaquim Mullol
- INGENIO, IRCE, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), CELLEX, Department 2B, Villarroel 170, 08036, Barcelona, Catalonia, Spain. .,Centre for Biomedical Investigation in Respiratory Diseases (CIBERES), Health Institute Carlos III, Madrid, Spain. .,Rhinology Unit and Smell Clinic, ENT Department, Hospital Clínic, Universitat de Barcelona, Barcelona, Catalonia, Spain.
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11
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Audronyte E, Pakulaite-Kazliene G, Sutnikiene V, Kaubrys G. Odor Discrimination as a Marker of Early Alzheimer's Disease. J Alzheimers Dis 2023; 94:1169-1178. [PMID: 37355894 PMCID: PMC10473073 DOI: 10.3233/jad-230077] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/25/2023] [Indexed: 06/26/2023]
Abstract
BACKGROUND Olfactory dysfunction is an early symptom of Alzheimer's disease (AD). However, olfactory tests are rarely performed in clinical practice because their diagnostic efficacy in detecting early AD is unclear. OBJECTIVE To investigate odor discrimination in patients with early AD and the efficacy of olfactory discrimination tests in differentiating these patients from subjects with normal cognition (CN). METHODS Thirty patients each with mild dementia due to AD (MD-AD) and mild cognitive impairment due to AD (MCI-AD) and 30 older subjects with CN were enrolled. All participants underwent cognitive examinations (CDR, MMSE, ADAS-Cog 13, and verbal fluency) and odor discrimination tests (Sniffin' Sticks test, Burghart®, Germany). RESULTS The MD-AD group achieved significantly worse scores on the olfactory discrimination test than the MCI-AD group, and the MCI-AD group achieved significantly worse results than the CN group (p < 0.05). A cut-off score of≤10 had a diagnostic accuracy of 94.44% (95% CI, 87.51-98.17%) in differentiating patients with MCI-AD/MD-AD from subjects with CN and of 91.67% (95% CI, 81.61-97.24%) in differentiating those with MCI-AD from subjects with CN. Our multinomial logistic regression model with demographic data and ADAS-Cog 13 scores as predictor variables correctly classified 82.2% of the cases (CN, 93.3%; MC-AD, 70%; MD-AD, 83.3%); on adding the olfactory discrimination score to the model, the percentage increased to 92.2% (CN, 96.7%; MCI-AD, 86.7%; MD-AD, 93.3%). CONCLUSION Odor discrimination is impaired in cases of early AD and continues to deteriorate as the disease progresses. The olfactory discrimination test showed good diagnostic efficacy in detecting early AD.
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Affiliation(s)
- Egle Audronyte
- Clinic of Neurology and Neurosurgery, Institute of Clinical Medicine, Faculty of Medicine, Vilnius University, Vilnius, Lithuania
| | - Gyte Pakulaite-Kazliene
- Clinic of Neurology and Neurosurgery, Institute of Clinical Medicine, Faculty of Medicine, Vilnius University, Vilnius, Lithuania
| | - Vaiva Sutnikiene
- Clinic of Neurology and Neurosurgery, Institute of Clinical Medicine, Faculty of Medicine, Vilnius University, Vilnius, Lithuania
| | - Gintaras Kaubrys
- Clinic of Neurology and Neurosurgery, Institute of Clinical Medicine, Faculty of Medicine, Vilnius University, Vilnius, Lithuania
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12
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Yang X, Chen M, Zhang Z, Li Y, Wang P, Luo X, Lv S. Alpha-aminoisobutyric acid incorporated peptides for the construction of electrochemical biosensors with high stability and low fouling in serum. Anal Chim Acta 2022; 1238:340646. [DOI: 10.1016/j.aca.2022.340646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 11/14/2022] [Accepted: 11/18/2022] [Indexed: 11/21/2022]
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13
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Disrupted olfactory functional connectivity in patients with late-life depression. J Affect Disord 2022; 306:174-181. [PMID: 35292309 DOI: 10.1016/j.jad.2022.03.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 03/05/2022] [Accepted: 03/08/2022] [Indexed: 12/13/2022]
Abstract
BACKGROUND Odor identification (OI) impairment increases the risk of Alzheimer's disease and brain abnormalities in patients with late-life depression (LLD). However, it remains unclear whether abnormal functional connectivity (FC) of olfactory regions is involved in the relationship between OI impairment and dementia risk in LLD patients. The current study aims to explore the olfactory FC patterns of LLD patients and how olfactory FCs mediate the relationship between OI and cognition. METHODS A total of 150 participants underwent resting-state functional magnetic resonance imaging and psychometric and olfactory assessments. The primary and secondary olfactory regions were selected as regions of interest to investigate olfactory FC patterns and their association with OI and cognitive performance in LLD patients. RESULTS Compared with LLD patients without OI impairment and normal controls, LLD patients with OI impairment exhibited increased FC between the left orbital frontal cortex (OFC) and left calcarine gyrus, between the left OFC and right lingual gyrus, between the right OFC and right rectus gyrus, and decreased FC between the right piriform cortex and right superior parietal lobule. Additionally, these abnormal FCs were associated with scores of OI, global cognition and language function. Finally, the FC between the right piriform cortex and right superior parietal lobule exhibited a partially mediated effect on the relationship between OI and MMSE scores. LIMITATIONS The present study did not exclude the possible effect of drugs. CONCLUSION LLD patients with OI impairment exhibited more disrupted olfactory FC (a decrease in the primary olfactory cortex and an increase in the secondary olfactory cortex) than LLD patients with intact OI, and these abnormal FCs may serve as potential targets for neuromodulation in LLD patients to prevent them from developing dementia.
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14
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Liu M, Chen B, Zhong X, Zhang M, Wang Q, Zhou H, Wu Z, Hou L, Peng Q, Zhang S, Yang M, Lin G, Ning Y. Differences in Odor Identification in Early-Onset and Late-Onset Depression. Brain Sci 2022; 12:brainsci12020276. [PMID: 35204039 PMCID: PMC8870099 DOI: 10.3390/brainsci12020276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 02/04/2022] [Accepted: 02/12/2022] [Indexed: 12/10/2022] Open
Abstract
(1) Background: Odor identification (OI) dysfunction is a potential predictor of developing dementia in late life depression (LLD). However, it is not clear whether patients with early onset depression (EOD) and late onset depression (LOD) may exhibit different OI dysfunctions. The aim of this study was to compare OI between EOD patients and LOD patients and its relationship with cognitive function. (2) Methods: A total of 179 patients with LLD and 189 normal controls were recruited. Participants underwent clinical assessment, olfactory testing, and comprehensive neuropsychological assessment. The OI scores of EOD patients and LOD patients were compared, and correlation analyses and mediation analyses were used to explore the relationship between OI and cognition. (3) Result: LOD patients exhibited lower OI scores than EOD patients and normal controls (NCs). Additionally, the LOD patients exhibited a higher percentage of OI dysfunction than the EOD patients. Moreover, OI scores were associated with global cognition, memory, language, and visuospatial ability in the EOD group (p < 0.05) but were not associated with any cognitive score in the LOD patients (p > 0.05). Finally, the scores of the Auditory Verbal Learning Test Immediate recall and Boston Naming Test exhibited a partially mediating effect on the difference in OI scores between the EOD and LOD patients. (4) Conclusions: LOD patients exhibited worse OI than EOD patients, and their difference in OI was mediated by their memory and language function.
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Affiliation(s)
- Meiling Liu
- The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou 510000, China; (M.L.); (B.C.); (X.Z.); (M.Z.); (Q.W.); (H.Z.); (Z.W.); (L.H.); (Q.P.); (S.Z.); (M.Y.); (G.L.)
| | - Ben Chen
- The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou 510000, China; (M.L.); (B.C.); (X.Z.); (M.Z.); (Q.W.); (H.Z.); (Z.W.); (L.H.); (Q.P.); (S.Z.); (M.Y.); (G.L.)
| | - Xiaomei Zhong
- The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou 510000, China; (M.L.); (B.C.); (X.Z.); (M.Z.); (Q.W.); (H.Z.); (Z.W.); (L.H.); (Q.P.); (S.Z.); (M.Y.); (G.L.)
| | - Min Zhang
- The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou 510000, China; (M.L.); (B.C.); (X.Z.); (M.Z.); (Q.W.); (H.Z.); (Z.W.); (L.H.); (Q.P.); (S.Z.); (M.Y.); (G.L.)
| | - Qiang Wang
- The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou 510000, China; (M.L.); (B.C.); (X.Z.); (M.Z.); (Q.W.); (H.Z.); (Z.W.); (L.H.); (Q.P.); (S.Z.); (M.Y.); (G.L.)
| | - Huarong Zhou
- The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou 510000, China; (M.L.); (B.C.); (X.Z.); (M.Z.); (Q.W.); (H.Z.); (Z.W.); (L.H.); (Q.P.); (S.Z.); (M.Y.); (G.L.)
| | - Zhangying Wu
- The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou 510000, China; (M.L.); (B.C.); (X.Z.); (M.Z.); (Q.W.); (H.Z.); (Z.W.); (L.H.); (Q.P.); (S.Z.); (M.Y.); (G.L.)
| | - Le Hou
- The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou 510000, China; (M.L.); (B.C.); (X.Z.); (M.Z.); (Q.W.); (H.Z.); (Z.W.); (L.H.); (Q.P.); (S.Z.); (M.Y.); (G.L.)
| | - Qi Peng
- The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou 510000, China; (M.L.); (B.C.); (X.Z.); (M.Z.); (Q.W.); (H.Z.); (Z.W.); (L.H.); (Q.P.); (S.Z.); (M.Y.); (G.L.)
| | - Si Zhang
- The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou 510000, China; (M.L.); (B.C.); (X.Z.); (M.Z.); (Q.W.); (H.Z.); (Z.W.); (L.H.); (Q.P.); (S.Z.); (M.Y.); (G.L.)
| | - Minfeng Yang
- The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou 510000, China; (M.L.); (B.C.); (X.Z.); (M.Z.); (Q.W.); (H.Z.); (Z.W.); (L.H.); (Q.P.); (S.Z.); (M.Y.); (G.L.)
| | - Gaohong Lin
- The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou 510000, China; (M.L.); (B.C.); (X.Z.); (M.Z.); (Q.W.); (H.Z.); (Z.W.); (L.H.); (Q.P.); (S.Z.); (M.Y.); (G.L.)
| | - Yuping Ning
- The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou 510000, China; (M.L.); (B.C.); (X.Z.); (M.Z.); (Q.W.); (H.Z.); (Z.W.); (L.H.); (Q.P.); (S.Z.); (M.Y.); (G.L.)
- The First School of Clinical Medicine, Southern Medical University, Guangzhou 510000, China
- Guangdong Engineering Technology Research Center for Translational Medicine of Mental Disorders, Guangzhou 510000, China
- Correspondence: ; Tel.: +86-20-81682902
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15
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Cha H, Kim S, Son Y. Associations Between Cognitive Function, Depression, and Olfactory Function in Elderly People With Dementia in Korea. Front Aging Neurosci 2022; 13:799897. [PMID: 35087394 PMCID: PMC8787281 DOI: 10.3389/fnagi.2021.799897] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Accepted: 12/20/2021] [Indexed: 11/18/2022] Open
Abstract
Early detection is important for delaying or preventing cognitive impairment. Since olfactory dysfunction and depression are common symptoms of cognitive dysfunction, they may serve as measurable risk indicators. This study was designed to identify the relationship between olfaction, depression, and each domain of cognitive function in elderly dementia patients in South Korea. Study participants were 108 patients who visited the outpatient clinic between March and September 2019. More significant impairment of olfactory function was found in those with mild (7.48 ± 1.28) or moderate (7.37 ± 2.22) test scores of the Expanded Clinical Dementia Rating (CDR) scale than in those with questionable scores (20.58 ± 6.18). The language domain of cognitive function, age, and education level showed 39.2% explanatory power for olfactory function (F = 5.591, p < 0.001). It is expected that assessment of olfactory function in elderly people can lead to the early detection, diagnosis, and treatment of dementia. Furthermore, it is important for future studies to confirm the relationship between each domain of cognitive function and olfactory function according to the type of dementia and to establish criteria for screening dementia in order to utilize olfactory function as a clinical marker.
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Affiliation(s)
- Hyegyeong Cha
- Department of Nursing, Namseoul University, Cheonan-si, South Korea
| | - Sisook Kim
- Department of Nursing, Namseoul University, Cheonan-si, South Korea
| | - Yedong Son
- College of Nursing, Woosuk University, Wanju-gun, South Korea
- *Correspondence: Yedong Son,
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16
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Zhang S, Chen B, Zhong X, Zhang M, Wang Q, Wu Z, Hou L, Zhou H, Chen X, Liu M, Yang M, Lin G, Hummel T, Ning Y. Interactive Effects of Agitation and Cognitive Impairment on Odor Identification in Patients With Late-Life Depression. Front Psychiatry 2022; 13:839012. [PMID: 35350425 PMCID: PMC8957811 DOI: 10.3389/fpsyt.2022.839012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Accepted: 02/10/2022] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Late-life depression (LLD) is a risk factor for cognitive decline in older adults, and odor identification (OI) deficits are an early indicator of cognitive decline with LLD. However, neuropsychiatric symptoms (NPSs) are common in LLD and are associated with OI deficits. In subjects with LLD, when OI deficits forecast cognitive decline, whether and how NPS affects the relationship between OI and cognition still must be further explored. OBJECTIVE To comprehensively explore the potential effects of various NPSs on the relationship between OI and cognition in participants with LLD. METHODS There were 167 patients with LLD and 105 normal elderly (NE) participants. The odor identification test (Sniffin' Sticks), cognitive function assessments (global cognition, memory, executive function, attention, language, visual space), and an NPS assessment (the neuropsychiatric inventory questionnaire) were performed on the subjects. In patients with LLD, the relationship among OI, cognition and NPSs was examined using correlation analysis and moderation analysis. RESULTS In patients with LLD, OI was positively correlated with cognition (global cognition, memory, executive function, attention, language) and negatively associated with NPSs (agitation and aberrant motor behavior). In NE group, OI was correlated with executive function. Moderation analysis showed that there was an interactive effect of agitation and cognitive impairment (language deficit or attention deficit) on OI in patients with LLD. CONCLUSION The coexistence of agitation and language or attention deficit was associated with worse OI in subjects with LLD. Agitation should be considered since OI predicts cognitive decline in patients with LLD.
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Affiliation(s)
- Si Zhang
- Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University, Memory Clinic, Guangzhou, China
| | - Ben Chen
- Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University, Memory Clinic, Guangzhou, China
| | - Xiaomei Zhong
- Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University, Memory Clinic, Guangzhou, China
| | - Min Zhang
- Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University, Memory Clinic, Guangzhou, China
| | - Qiang Wang
- Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University, Memory Clinic, Guangzhou, China
| | - Zhangying Wu
- Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University, Memory Clinic, Guangzhou, China
| | - Le Hou
- Department of Neurology, The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou, China
| | - Huarong Zhou
- Department of Neurology, The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou, China
| | - Xinru Chen
- Department of Neurology, The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou, China
| | - Meiling Liu
- Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University, Memory Clinic, Guangzhou, China
| | - Mingfeng Yang
- Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University, Memory Clinic, Guangzhou, China
| | - Gaohong Lin
- Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University, Memory Clinic, Guangzhou, China
| | - Thomas Hummel
- Department of Otorhinolaryngology, Technische Universität Dresden, Smell and Taste Clinic, Dresden, Germany
| | - Yuping Ning
- Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University, Memory Clinic, Guangzhou, China.,The First School of Clinical Medicine, Southern Medical University, Guangzhou, China.,Guangdong Engineering Technology Research Center for Translational Medicine of Mental Disorders, Guangzhou, China
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Low J, Seet M, Hamano J, Saba M, Thakor NV, Dragomir A. Community Analysis of Brain Functional Networks Reveals Systems-Level Integration in Olfactory Hedonic Perception. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2021; 2021:5995-5998. [PMID: 34892484 DOI: 10.1109/embc46164.2021.9629919] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Olfactory hedonic perception involves complex interplay among an ensemble of neurocognitive systems implicated in sensory, affective and reward processing. However, the mechanisms of these inter-system interactions have yet to be well-characterized. Here, we employ directed functional connectivity networks estimated from source-localized EEG to uncover how brain regions across the olfactory, emotion and reward systems integrate organically into cross-system communities. Using the integration coefficient, a graph theoretic measure, we quantified the effect of exposure to fragrance stimuli of different hedonic values (high vs low pleasantness levels) on inter-systems interactions. Our analysis focused on beta band activity (13-30 Hz), which is known to facilitate integration of cortical areas involved in sensory perception. Higher-pleasantness stimuli induced elevated integration for the reward system, but not for the emotion and olfactory systems. Furthermore, the nodes of reward system showed more outward connections to the emotion and olfactory systems than inward connections from the respective systems. These results suggest the centrality of the reward system-supported by beta oscillations-in actively coordinating multi-system interactivity to give rise to hedonic experiences during olfactory perception.
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18
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Wang Q, Chen B, Zhong X, Zhou H, Zhang M, Mai N, Wu Z, Huang X, Haehner A, Chen X, Auber LA, Peng Q, Hummel T, Ning Y. Olfactory Dysfunction Is Already Present with Subjective Cognitive Decline and Deepens with Disease Severity in the Alzheimer's Disease Spectrum. J Alzheimers Dis 2021; 79:585-595. [PMID: 33361601 DOI: 10.3233/jad-201168] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
BACKGROUND Odor identification dysfunction occurs early in Alzheimer's disease (AD) and is considered a preclinical symptom along with subjective cognitive decline (SCD). Nevertheless, whether subjects with SCD are co-symptomatic with odor identification dysfunction remains unclear. OBJECTIVE To compare the degree of odor identification dysfunction and assess the relation between odor identification and cognitive performance in the AD spectrum (including SCD, mild cognitive impairment (MCI), and AD). METHODS Patients (84 SCD, 129 MCI, 52 AD) and 35 controls underwent the Sniffin' Sticks Screen 16 test and comprehensive neuropsychological examination. RESULTS Odor identification scores were progressively lower moving from normal older adult to SCD, MCI, and AD. Additionally,the proportion of odor identification dysfunction were increasingly higher in the AD spectrum (p for trend <0.001), but no significant difference was found in the proportion of subjective olfactory dysfunction. No significant correlation was found between odor identification and cognition in the normal older adults and SCD subjects, but odor identification correlated with global cognition in the MCI (r = 0.199, p = 0.033) and in the AD (r = 0.300, p = 0.036) patients. Multiple linear regression showed that odor identification dysfunction was most strongly associated with memory among different cognitive subdomains and was most strongly associated with immediate verbal recall among different memory subdomains. CONCLUSION Odor identification dysfunction is already present with SCD and deepens with disease severity in the AD spectrum, and it may contribute to predicting cognitive decline and identifying SCD subjects who are at risk of developing AD.
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Affiliation(s)
- Qiang Wang
- Memory Clinic, Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China.,Department of Geriatric Psychiatry, The Second People's Hospital of Dali Bai Autonomous Prefecture, Dali, Yunnan Province, China
| | - Ben Chen
- Memory Clinic, Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Xiaomei Zhong
- Memory Clinic, Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Huarong Zhou
- Memory Clinic, Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Min Zhang
- Memory Clinic, Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Naikeng Mai
- Department of Neurology, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Zhangying Wu
- Memory Clinic, Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Xingxiao Huang
- Memory Clinic, Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Antje Haehner
- Smell and Taste Clinic, Department of Otorhinolaryngology, Technische Universität Dresden, Germany
| | - Xinru Chen
- Memory Clinic, Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Lavinia Alberi Auber
- Department of Medicine, University of Fribourg, Fribourg, Switzerland.,Swiss Integrative Center of Human Health, Fribourg, Switzerland
| | - Qi Peng
- Memory Clinic, Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Thomas Hummel
- Smell and Taste Clinic, Department of Otorhinolaryngology, Technische Universität Dresden, Germany
| | - Yuping Ning
- Memory Clinic, Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China.,The first School of Clinical Medicine, Southern Medical University, Guangzhou, Guangdong Province, China.,Guangdong Engineering Technology Research Center for Translational Medicine of Mental Disorders, Guangzhou, China
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Impact of olfactory dysfunction on quality of life in coronavirus disease 2019 patients: a systematic review. The Journal of Laryngology & Otology 2021; 135:947-952. [PMID: 34425929 PMCID: PMC8438414 DOI: 10.1017/s0022215121002279] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
OBJECTIVE To outline the impact on quality of life in coronavirus disease 2019 patients with olfactory dysfunction. METHODS Five databases were searched for articles referring to the impact on quality of life in coronavirus disease 2019 patients with olfactory dysfunction. The search was conducted for the period from November 2019 to April 2021. The search was conducted over one month (May 2021). RESULTS Four studies that met the objective were included. Altogether, there were 1045 patients. Various questionnaires were used to assess quality of life. Overall, the quality of life deficit affected 67.7 per cent of patients. Quality of life domains investigated include overall quality of life (four studies), food and taste dysfunction (two studies), mental health (two studies), cognitive function (one study), functional outcome (one study) and safety domains (one study). CONCLUSION Quality of life deficit was reported to be 67.7 per cent among coronavirus disease 2019 patients with olfactory dysfunction. The high prevalence of persistent olfactory dysfunction prompts more serious research, as the long-standing consequences of olfactory dysfunction are detrimental.
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Walker IM, Fullard ME, Morley JF, Duda JE. Olfaction as an early marker of Parkinson's disease and Alzheimer's disease. HANDBOOK OF CLINICAL NEUROLOGY 2021; 182:317-329. [PMID: 34266602 DOI: 10.1016/b978-0-12-819973-2.00030-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Olfactory impairment is a common and early sign of Parkinson's disease (PD) and Alzheimer's disease (AD), the two most prevalent neurodegenerative conditions in the elderly. This phenomenon corresponds to pathologic processes emerging in the olfactory system prior to the onset of typical clinical manifestations. Clinically available tests can establish hyposmia through odor identification assessment, discrimination, and odor detection threshold. There are significant efforts to develop preventative or disease-modifying therapies that slow down or halt the progression of PD and AD. Due to the convenience and low cost of its assessment, olfactory impairment could be used in these studies as a screening instrument. In the clinical setting, loss of smell may also help to differentiate PD and AD from alternative causes of Parkinsonism and cognitive impairment, respectively. Here, we discuss the pathophysiology of olfactory dysfunction in PD and AD and how it can be assessed in the clinical setting to aid in the early and differential diagnosis of these disorders.
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Affiliation(s)
- Ian M Walker
- Parkinson's Disease Research, Education and Clinical Center, Michael J. Crescenz, VA Medical Center, Philadelphia, PA, United States; Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Michelle E Fullard
- Department of Neurology, University of Colorado School of Medicine, Aurora, CO, United States
| | - James F Morley
- Parkinson's Disease Research, Education and Clinical Center, Michael J. Crescenz, VA Medical Center, Philadelphia, PA, United States; Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - John E Duda
- Parkinson's Disease Research, Education and Clinical Center, Michael J. Crescenz, VA Medical Center, Philadelphia, PA, United States; Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States.
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Li AR, Schlosser RJ, Germroth M, Eckert MA. Voxel-based meta-analysis of gray matter alterations in olfactory dysfunction. Int Forum Allergy Rhinol 2021; 12:112-115. [PMID: 34309218 DOI: 10.1002/alr.22872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 07/02/2021] [Accepted: 07/04/2021] [Indexed: 11/08/2022]
Affiliation(s)
- Andraia R Li
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, SC
| | - Rodney J Schlosser
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, SC
| | - Matthew Germroth
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, SC
| | - Mark A Eckert
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, SC
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22
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Bergmann C, Stögmann E, Lehrner J. Depressive symptoms and olfactory function in patients with subjective cognitive decline, mild cognitive impairment and Alzheimer's disease. BRAIN DISORDERS 2021. [DOI: 10.1016/j.dscb.2021.100014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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23
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Chen B, Benzien C, Faria V, Ning Y, Cuevas M, Linke J, Croy I, Haehner A, Hummel T. Symptoms of Depression in Patients with Chemosensory Disorders. ORL J Otorhinolaryngol Relat Spec 2021; 83:135-143. [PMID: 33756467 DOI: 10.1159/000513751] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Accepted: 12/13/2020] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Patients with chemosensory dysfunction frequently report symptoms of depression. The current study aims to clarify whether the type (smell dysfunction, taste dysfunction, and mixed smell and taste dysfunction), severity, duration, or cause of dysfunction have differential impacts on the symptoms of depression. METHODS 899 patients with chemosensory disorders and 62 controls were included. Following a structured interview and an otorhinolaryngological examination, subjects underwent olfactory tests (Sniffin' Sticks), gustatory tests (taste sprays) and an assessment of depressive symptoms (Beck Depression Inventory). Information on the cause and duration of disorders was also collected. RESULTS Patients with combined olfactory/gustatory dysfunction had higher depression scores than patients with smell dysfunction only and controls, and no significant difference was found between the smell dysfunction and controls. Anosmia patients, but not hyposmia patients, exhibited higher depression scores than controls. Among various causes of chemosensory disorders, patients from the posttraumatic group had higher depression scores than patients with other causes of chemosensory dysfunction (sinonasal, idiopathic, or postinfectious). Multiple linear regression analyses suggested that reduced olfactory function was associated with enhanced depression scores in the olfactory disorders group (B = -0.326, t = -2.294, and p = 0.02) and in all patients with chemosensory disorders (B = -0.374, t = -2.550, p = 0.017). DISCUSSION/CONCLUSION Simultaneously decreased input of olfaction and gustation seems to have an additive effect on the exacerbation of emotional dysfunction. Early intervention should be considered for depression symptoms in patients with mixed olfactory/gustatory dysfunction in clinical practice.
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Affiliation(s)
- Ben Chen
- Department of Otorhinolaryngology, Smell & Taste Clinic, TU Dresden, Dresden, Germany, .,Department of Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, China,
| | - Cara Benzien
- Department of Otorhinolaryngology, Smell & Taste Clinic, TU Dresden, Dresden, Germany
| | - Vanda Faria
- Department of Otorhinolaryngology, Smell & Taste Clinic, TU Dresden, Dresden, Germany.,Department of Psychology, Uppsala University, Uppsala, Sweden.,Department of Anesthesiology, Center for Pain and the Brain, Perioperative and Pain Medicine, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Yuping Ning
- Department of Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, China
| | - Mandy Cuevas
- Department of Otorhinolaryngology, Smell & Taste Clinic, TU Dresden, Dresden, Germany
| | - Jana Linke
- Department of Otorhinolaryngology, Smell & Taste Clinic, TU Dresden, Dresden, Germany
| | - Ilona Croy
- Department of Psychosomatic Medicine, TU Dresden, Dresden, Germany
| | - Antje Haehner
- Department of Otorhinolaryngology, Smell & Taste Clinic, TU Dresden, Dresden, Germany
| | - Thomas Hummel
- Department of Otorhinolaryngology, Smell & Taste Clinic, TU Dresden, Dresden, Germany
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Chen B, Zhong X, Zhang M, Mai N, Wu Z, Chen X, Peng Q, Zhou H, Wang Q, Yang M, Zhang S, Auber LA, Croy I, Hummel T, Ning Y. The additive effect of late-life depression and olfactory dysfunction on the risk of dementia was mediated by hypersynchronization of the hippocampus/fusiform gyrus. Transl Psychiatry 2021; 11:172. [PMID: 33731679 PMCID: PMC7969612 DOI: 10.1038/s41398-021-01291-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 02/18/2021] [Accepted: 02/25/2021] [Indexed: 01/19/2023] Open
Abstract
Early detection of patients with late-life depression (LLD) with a high risk of developing dementia contributes to early intervention. Odor identification (OI) dysfunction serves as a marker for predicting dementia, but whether OI dysfunction increases the risk of dementia in LLD patients remains unclear. The present study aimed to explore the interactive effect of LLD and OI dysfunction on the risk of dementia and its underlying neuroimaging changes. One hundred and fifty-seven LLD patients and 101 normal controls were recruited, and data on their OI, cognition, activity of daily living (ADL), and resting-state functional magnetic resonance imaging were collected. Two × two factorial analyses were used to analyze the interactive effects of LLD and OI dysfunction on neuropsychological and neuroimaging abnormalities. Mediation analyses were used to explore whether abnormalities detected by neuroimaging mediated the the associations between OI and cognition/ADL. The results suggested that LLD and OI dysfunction exhibited additive effects on reduced ADL, global cognition and memory scores, as well as neuroimaging variables including (i) increased fractional amplitude of low-frequency fluctuation (fALFF) in the right orbitofrontal cortex and right precentral cortex, and (ii) increased regional homogeneity (ReHo) in the left hippocampus/fusiform gyrus, etc. In addition, these increased fALFF and ReHo values were associated with reduced neuropsychological scores (ADL, global cognition, memory, and language). Moreover, ReHo of the left hippocampus/fusiform gyrus completely mediated the relationship between OI and ADL, and partially mediated the relationship between OI and global cognition. Overall, mediated by the hypersynchronization of the left hippocampus/fusiform gyrus, OI dysfunction may increase the risk of dementia in LLD patients.
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Affiliation(s)
- Ben Chen
- Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
- Smell and Taste Clinic, Department of Otorhinolaryngology, Technische Universität Dresden, Dresden, Germany
| | - Xiaomei Zhong
- Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Min Zhang
- Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Naikeng Mai
- Department of Neurology, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Zhangying Wu
- Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Xinru Chen
- Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Qi Peng
- Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Huarong Zhou
- Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Qiang Wang
- Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Mingfeng Yang
- Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Si Zhang
- Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Lavinia Alberi Auber
- Department of Medicine, University of Fribourg, Fribourg, Switzerland
- Swiss Integrative Center of Human Health, Fribourg, Switzerland
| | - Ilona Croy
- Department of Psychosomatic Medicine, Technische Universität Dresden, Dresden, Germany
| | - Thomas Hummel
- Smell and Taste Clinic, Department of Otorhinolaryngology, Technische Universität Dresden, Dresden, Germany
| | - Yuping Ning
- Department of Geriatric Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China.
- The first School of Clinical Medicine, Southern Medical University, Guangzhou, Guangdong Province, China.
- Guangdong Engineering Technology Research Center for Translational Medicine of Mental Disorders, Guangzhou, China.
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Abstract
We assessed the frequency, duration, and degree of unpleasantness of olfactory hallucinations in Alzheimer's disease (AD). Informants of 31 AD patients were invited to rate the frequency, duration, and degree of unpleasantness of olfactory, auditory, and visual hallucinations. Analysis demonstrated little occurrence of olfactory hallucinations compared with auditory or visual hallucinations. Results also demonstrated that olfactory hallucinations span from a few seconds to one minute, a duration that was similar to that of auditory and visual hallucinations. Olfactory hallucinations were rated as unpleasant compared with auditory or visual hallucinations. Finally, olfactory hallucinations were significantly correlated with depression. Our findings demonstrate little occurrence of olfactory hallucinations but that when they occur, they are experienced as relatively unpleasant in AD patients. Our findings also demonstrate a relationship between olfactory hallucinations and psychiatric characteristics (i.e., depression) in AD.
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Kullakçi H, Sonkaya AR. The Investigation of the Effects of Repetitive Transcranialmagnetic Stimulation Treatment on Taste and Smell Sensations in Depressed Patients. ACTA ACUST UNITED AC 2021; 58:26-33. [PMID: 33795949 DOI: 10.29399/npa.25087] [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: 03/03/2020] [Accepted: 08/18/2020] [Indexed: 11/07/2022]
Abstract
Introduction Loss in sense of smell and taste is a condition that can occur without an organic pathology and it is noteworthy in patients diagnosed with Major Depressive Disorder (MDD). Few studies have shown that Repetitive Transcranial Magnetic Stimulation (tTMS) can correct losses in sense of smell and taste. In this study, we aimed to examine the effects of tTMS treatment applied to patients diagnosed with MDD on the sense of smell and taste in this patient group. Methods The sense of smell of 56 patients who were diagnosed with MDD and had tTMS indication was examined with the "Sniffin' Sticks" smell test and the sense of taste with the "Taste Strips" taste test. MDD patients who lost at least one sense of smell and taste were included in the study, but a total of 30 patients were able to complete the study. Hamilton Depression Scale (HAM-D) was applied to the patients before tTMS treatment, and this scale was repeated after 15 sessions of tTMS treatment. Taste and smell senses were re-evaluated after the last tTMS session. Results According to the Sniffin Stick Smell test, 15 of 29 patients with hyposmia had normosmia after tTMS, and 16 of 18 patients who were found to have hypogeusia according to Taste Strips Taste test had Normogeusia after tTMS. There was a positive improvement in both the smell and taste scores of all patients who were treated, compared to before tTMS. The positive improvement in the smell tests of the patients who responded to the treatment according to the HAM-D scores was found to be significantly different than the patients who did not respond. Conclusion The positive effect of tTMS treatment on the sense of smell and taste has been demonstrated even in patients whose HAM-D scores could not be sufficiently decreased. In patients diagnosed with depression, using tTMS alone or adding it to the current treatment suggests that it may have a positive effect on the sense of smell and taste as well as depression treatment.
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Affiliation(s)
- Hakan Kullakçi
- Health Science University, Sultan Abdülhamid Han Training and Research Hospital, Department of Psychiatry, Istanbul, Turkey
| | - Ali Rıza Sonkaya
- Health Science University, Gülhane School of Medicine, Department of Neurology, Ankara, Turkey
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Abstract
Age-related olfactory dysfunction, or presbyosmia, is a common sensory impairment in aging adults. People in this demographic group with comorbid conditions or exposure to viral, traumatic, or environmental insults remain at the greatest risk for impairment. Several methods for assessing olfaction exist, but they are only available in special settings and require consideration of age, sex, ancestry, and cognition. Perhaps most importantly, olfactory dysfunction has been suggested as an early sign of Alzheimer's and Parkinson's disease and therefore may serve as a tool in the diagnosis and prognosis of these neurodegenerative conditions. Outside of this context, olfactory loss also impacts nutrition, safety, and social relationships, and even predicts mortality itself. This review covers the detection and manifestations of olfactory decline in aging individuals and the myriad ways in which olfactory impairment is connected to their health and well-being.
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Affiliation(s)
- Emily J Papazian
- Pritzker School of Medicine, The University of Chicago, Chicago, IL, USA
- Department of Otorhinolaryngology-Head and Neck Surgery, University of Pennsylvania, Philadelphia, PA, USA
| | - Jayant M Pinto
- Section of Otolaryngology-Head and Neck Surgery, Department of Surgery, The University of Chicago Medicine, Chicago, IL, USA
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Sorokowska A, Sabiniewicz A, Larsson M. TOM-32-An extended test for the assessment of olfactory memory. J Neurosci Methods 2020; 344:108873. [PMID: 32710924 DOI: 10.1016/j.jneumeth.2020.108873] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 07/08/2020] [Accepted: 07/20/2020] [Indexed: 11/15/2022]
Abstract
BACKGROUND Olfactory memory testing is a promising way to explore different aspects of smell-related abilities in healthy subjects as well as to diagnose various diseases associated with disorders of this type of memory. Despite the obvious value of olfactory memory assessments, few available methods enable its diagnosis. NEW METHOD The aim of our study was to create a standardized research tool designed for olfactory memory studies: an extended, 32-item version of an available "Test for Odor Memory". RESULTS The study involving 222 subjects revealed satisfactory psychometric qualities of TOM-32, and - as hypothesized - subjects with depression scored significantly lower than healthy participants. We additionally showed that TOM-32 scores was associated with sex, age and olfactory awareness. Women performed significantly better than men, young people tended to have lower false alarm rate than older subjects and olfactory awareness was positively associated with olfactory memory. COMPARISON WITH EXISTING METHOD(S) TOM-32 could expand the possibilities of testing olfactory memory. It may offer additional information about cognitive and sensory abilities relative to existing research tools, and the large number of included test items may facilitate repeated and longitudinal testing. Wide range of applied odors increases the possibility to detect subtle differences between, as well as changes within, individuals. CONCLUSIONS We present an extensive olfactory memory test with satisfactory psychometric qualities - a test that is comprehensive enough to show significant inter- and intra-individual differences, but time-efficient enough to be comfortable in daily research and clinical usage.
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Affiliation(s)
- Agnieszka Sorokowska
- Smell and Taste Research Lab, Institute of Psychology, University of Wroclaw, Pl. Dawida 1, 50-527 Wroclaw, Poland.
| | - Agnieszka Sabiniewicz
- Smell and Taste Research Lab, Institute of Psychology, University of Wroclaw, Pl. Dawida 1, 50-527 Wroclaw, Poland.
| | - Maria Larsson
- Gösta Ekman Laboratory, Department of Psychology, Stockholm University, Frescati Hagväg 9A, 106 91 Stockholm, Sweden.
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Kazour F, Richa S, Abi Char C, Surget A, Elhage W, Atanasova B. Olfactory markers for depression: Differences between bipolar and unipolar patients. PLoS One 2020; 15:e0237565. [PMID: 32791517 PMCID: PMC7426149 DOI: 10.1371/journal.pone.0237565] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Accepted: 07/30/2020] [Indexed: 01/05/2023] Open
Abstract
OBJECTIVES The aim of the study was to compare olfactory functions between unipolar and bipolar patients according to the thymic states (depressed, euthymic) and determine specific olfactory variations between these different states. METHODS We recruited 176 participants in 5 groups: depressed bipolar (DB), euthymic bipolar (EB), depressed unipolar (DU), euthymic unipolar (EU), and controls (HC). They were assessed using the Sniffin' sticks threshold and identification tests. Odors' pleasantness, intensity, familiarity and emotion were assessed. Clinical evaluation explored dimensions of depression, mania, anxiety, and anhedonia. RESULTS Smell identification was lower in DU compared to EU patients and controls. Pleasant odors received lower hedonic rating in DU and DB patients compared to EU and EB patients respectively. Negative correlation was found in EB patients between hedonic rating and social anhedonia. In EU patients hedonic rating was negatively correlated with anxiety-state, and anhedonia. CONCLUSIONS Odor identification of pleasant odors is altered in both depressive states. Only unipolar patients would recover a regular identification level in symptomatic remission, while bipolar subjects would keep their deficits. Hedonic rating is lower in bipolar depressed patients compared to unipolar ones, and these deficits improve after remission. Hedonic rating of pleasant odors may distinguish bipolar depression from unipolar depression during periods of decompensation and phases of remission. Olfactory assessment may be useful to screen unipolar and bipolar depression, leading to possible future sensory markers in mood disorders.
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Affiliation(s)
- François Kazour
- UMR 1253, Inserm, iBrain, Université de Tours, Tours, France
- Psychiatric Hospital of the Cross, Jal Eddib, Lebanon
- Department of Psychiatry, Faculty of Medicine, Saint-Joseph University, Beirut, Lebanon
| | - Sami Richa
- Department of Psychiatry, Faculty of Medicine, Saint-Joseph University, Beirut, Lebanon
| | | | | | - Wissam Elhage
- UMR 1253, Inserm, iBrain, Université de Tours, Tours, France
- CHRU de Tours, Clinique Psychiatrique Universitaire, Tours, France
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Olfactory Memory in Depression: State and Trait Differences between Bipolar and Unipolar Disorders. Brain Sci 2020; 10:brainsci10030189. [PMID: 32214029 PMCID: PMC7139478 DOI: 10.3390/brainsci10030189] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 03/22/2020] [Accepted: 03/23/2020] [Indexed: 11/17/2022] Open
Abstract
Background: Changes in olfactory recognition memory may constitute sensory markers in depression. Significant differences may exist between unipolar and bipolar depression. Our study compares olfactory memory between control, unipolar, and bipolar patients in depressed and euthymic states in order to identify potential markers of depression. Methods: 176 participants were recruited in 5 groups: depressed bipolar (DB), euthymic bipolar (EB), depressed unipolar (DU), euthymic unipolar (EU), and controls (HC). The participants had a standardized clinical and olfactory assessment (olfactory memory, evaluation of pleasantness, intensity, familiarity, and emotional aspect of smells). Results: DU, DB, and EU patients had a deficit in olfactory memory compared to HC. DB patients had lower capacity to recognize new odors. DB and DU patients had more limited detection of unfamiliar odors than HC. DB patients rated odors as less pleasant compared to the other groups. All groups had lower hedonic ratings than HC. DB patients had lower emotional ratings than EU patients. Conclusions: Olfactory memory is impaired in depressive states, thus constituting a state marker of depression. Impairments in olfactory memory persist after remission of bipolar depression, thus constituting a possible trait marker of bipolarity. Hedonic rating differentiates unipolar from bipolar depression. This is the first study that identifies a sensory marker differentiating between unipolar and bipolar depression.
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Chen B, Zhong X, Mai N, Peng Q, Zhang M, Chen X, Wu Z, Zou L, Liang W, Ouyang C, Wu Y, Ning Y. Interactive Effect of Depression and Cognitive Impairment on Olfactory Identification in Elderly People. J Alzheimers Dis 2019; 66:1645-1655. [PMID: 30475771 DOI: 10.3233/jad-180760] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Olfactory identification (OI) deficits have been regarded as an indicator of cognitive impairment in the elderly, but few studies have analyzed the mixed effect of depression on OI. Since depression is common in the elderly and strongly associated with OI, we aimed to explore whether the comorbidity of depression and cognitive impairment may be associated with worse outcomes. In total, 153 elderly patients with depression and 154 normal elderly were recruited. Subjects underwent assessments of depression, cognitive function, and OI. Information on the factors that may affect OI performance was collected (age, sex, smoking history, diabetes, etc.). Correlation analysis showed that several factors had a significant influence on OI performance in the elderly, including severity of depression, cognitive scores, age, sex, and years of education (p < 0.05). Among the different cognitive domains, OI was positively associated with global cognition, memory, language, executive function, and attention performance (p < 0.05). The multiple linear regression analysis indicated that memory scores, age, HAMD scores, and sex were the most relevant factors to OI scores across all elderly participants. The factorial analysis suggested that elderly with comorbidity of depression and cognitive impairment (memory deficits or language deficits) had worse OI impairment, and there was an interactive effect of depression and memory deficits on OI in elderly people. The present study suggested that the coexistence of depressive symptoms and cognitive impairment was associated with worse OI in the elderly. Studies exploring the association between OI and cognitive function should include an assessment of depression and adjust the interactive effects of depression.
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Affiliation(s)
- Ben Chen
- Department of Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Xiaomei Zhong
- Department of Neurology, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Naikeng Mai
- Department of Neurology, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Qi Peng
- Department of Neurology, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Min Zhang
- Department of Neurology, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Xinru Chen
- Department of Neurology, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Zhangying Wu
- Department of Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Laiquan Zou
- Department of Psychology, School of Public Health, Southern Medical University, Guangzhou, Guangdong Province, China
| | - Wanyuan Liang
- Department of Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Cong Ouyang
- Department of Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Yujie Wu
- Department of Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
| | - Yuping Ning
- Department of Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, Guangdong Province, China
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Kim BY, Park J, Kim E, Kim B. Olfactory Ensheathing Cells Mediate Neuroplastic Mechanisms After Olfactory Training in Mouse Model. Am J Rhinol Allergy 2019; 34:217-229. [PMID: 31680531 DOI: 10.1177/1945892419885036] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Background Several studies have reported beneficial effects of olfactory training (OT) on the olfactory nervous system. However, the mechanisms underlying the regeneration of the olfactory system induced by OT are still under investigation. Objectives To determine the key mechanisms involved in the olfactory system recovery and to assess the neuroplastic effects of OT. Methods Thirty healthy female C57BL/6 mice were randomly allocated to 4 groups: control, n = 6; anosmia (no treatment), n = 8; OT, n = 8; and steroid treatment; n = 8. Except for the control group, mice were administered 3-methylindole. Anosmia was assessed using a food-finding test (FFT). The olfactory neuroepithelium was for histological examinations, gene ontology with pathway analyses, RNA, and protein studies. Results FFT was significantly reduced at 3 weeks in the OT mice versus steroids (78.27 s vs 156.83 s, P < .008) and controls (78.27 s vs 13.14 s, P < .003), although final outcome in the FFT was similar in these groups. Expression of olfactory and neurogenesis marker was higher in the olfactory neuroepithelium of the OT group than in the anosmia group without treatment. The mechanisms underlying olfactory regeneration might be related to early olfactory receptor stimulation, followed by neurotrophic factor stimulation of neuronal plasticity. Conclusion OT can improve olfactory function and accelerate olfactory recovery. The mechanisms underlying olfactory regeneration might be related to an initial stimulation of olfactory receptors followed by neurogenesis. Olfactory ensheathing cells might play an important role in olfactory regeneration following OT, based on the observed changes in messenger ribonucleic acid (mRNA) and protein expression, as well as the findings of the gene analysis.
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Affiliation(s)
- Boo-Young Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Uijeongbu, Korea
| | - JuYeon Park
- Department of Clinical Laboratory, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Uijeongbu, Korea
| | - EuiJin Kim
- Department of Clinical Laboratory, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Uijeongbu, Korea
| | - ByungGuk Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, St. Paul Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Stickel S, Weismann P, Kellermann T, Regenbogen C, Habel U, Freiherr J, Chechko N. Audio-visual and olfactory-visual integration in healthy participants and subjects with autism spectrum disorder. Hum Brain Mapp 2019; 40:4470-4486. [PMID: 31301203 PMCID: PMC6865810 DOI: 10.1002/hbm.24715] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 05/23/2019] [Accepted: 07/01/2019] [Indexed: 01/22/2023] Open
Abstract
The human capacity to integrate sensory signals has been investigated with respect to different sensory modalities. A common denominator of the neural network underlying the integration of sensory clues has yet to be identified. Additionally, brain imaging data from patients with autism spectrum disorder (ASD) do not cover disparities in neuronal sensory processing. In this fMRI study, we compared the underlying neural networks of both olfactory-visual and auditory-visual integration in patients with ASD and a group of matched healthy participants. The aim was to disentangle sensory-specific networks so as to derive a potential (amodal) common source of multisensory integration (MSI) and to investigate differences in brain networks with sensory processing in individuals with ASD. In both groups, similar neural networks were found to be involved in the olfactory-visual and auditory-visual integration processes, including the primary visual cortex, the inferior parietal sulcus (IPS), and the medial and inferior frontal cortices. Amygdala activation was observed specifically during olfactory-visual integration, with superior temporal activation having been seen during auditory-visual integration. A dynamic causal modeling analysis revealed a nonlinear top-down IPS modulation of the connection between the respective primary sensory regions in both experimental conditions and in both groups. Thus, we demonstrate that MSI has shared neural sources across olfactory-visual and audio-visual stimulation in patients and controls. The enhanced recruitment of the IPS to modulate changes between areas is relevant to sensory perception. Our results also indicate that, with respect to MSI processing, adults with ASD do not significantly differ from their healthy counterparts.
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Affiliation(s)
- Susanne Stickel
- Department of Psychiatry, Psychotherapy and PsychosomaticsFaculty of Medicine, RWTH AachenAachenGermany
- Institute of Neuroscience and Medicine: JARA‐Institute Brain Structure Function Relationship (INM 10)Research Center JülichJülichGermany
| | - Pauline Weismann
- Department of Psychiatry and PsychotherapyFriedrich‐Alexander‐Universität Erlangen‐NürnbergErlangenGermany
| | - Thilo Kellermann
- Department of Psychiatry, Psychotherapy and PsychosomaticsFaculty of Medicine, RWTH AachenAachenGermany
- Institute of Neuroscience and Medicine: JARA‐Institute Brain Structure Function Relationship (INM 10)Research Center JülichJülichGermany
| | - Christina Regenbogen
- Department of Psychiatry, Psychotherapy and PsychosomaticsFaculty of Medicine, RWTH AachenAachenGermany
- Institute of Neuroscience and Medicine: JARA‐Institute Brain Structure Function Relationship (INM 10)Research Center JülichJülichGermany
- Department of Clinical NeuroscienceKarolinska InstitutetStockholmSweden
| | - Ute Habel
- Department of Psychiatry, Psychotherapy and PsychosomaticsFaculty of Medicine, RWTH AachenAachenGermany
- Institute of Neuroscience and Medicine: JARA‐Institute Brain Structure Function Relationship (INM 10)Research Center JülichJülichGermany
| | - Jessica Freiherr
- Department of Psychiatry and PsychotherapyFriedrich‐Alexander‐Universität Erlangen‐NürnbergErlangenGermany
- Sensory AnalyticsFraunhofer Institute for Process Engineering and Packaging IVVFreisingGermany
| | - Natalya Chechko
- Department of Psychiatry, Psychotherapy and PsychosomaticsFaculty of Medicine, RWTH AachenAachenGermany
- Institute of Neuroscience and Medicine: JARA‐Institute Brain Structure Function Relationship (INM 10)Research Center JülichJülichGermany
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Chen B, Klarmann R, Israel M, Ning Y, Colle R, Hummel T. Difference of olfactory deficit in patients with acute episode of schizophrenia and major depressive episode. Schizophr Res 2019; 212:99-106. [PMID: 31416747 DOI: 10.1016/j.schres.2019.08.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 08/03/2019] [Accepted: 08/03/2019] [Indexed: 12/16/2022]
Abstract
UNLABELLED Aim Olfactory deficits are potential markers of early diagnosis, monitoring progress and predicting outcome in patients with schizophrenia and depression. We aimed to investigate differences in patterns and influencing factors of olfactory deficits between patients with acute episode of schizophrenia and major depressive episode (MDE). METHODS Fifty-two patients with acute episode of schizophrenia, 75 patients with unipolar MDE and 199 healthy controls were included in this retrospective study. Following a structured interview, participants underwent olfactory tests (Sniffin' Sticks), assessment of psychiatric symptoms (Positive and Negative Syndrome Scale), depressive symptoms (Hamilton Depression Rating Scale), and cognitive function (color-word test and word generation test). RESULTS Both patients with schizophrenia and MDE exhibited significant olfactory deficits, and MDE patients have poorer olfactory sensitivity than schizophrenia. Patients with MDE had a higher proportion of olfactory deficits (45.3% and 28%, respectively) but a better self-awareness (21.3% and 9.6%, respectively) than patients with schizophrenia. In patients with schizophrenia, PANSS scores was positively associated with olfactory sensitivity but negatively associated with olfactory identification, and olfactory discrimination was associated with word generation. In patients with MDE, olfactory discrimination was associated with word generation and age, but not disease severity. First-episode schizophrenia group showed significantly lower threshold scores than recurrent schizophrenia group, and first-episode MDE group had significantly lower threshold scores and higher discrimination scores than the recurrent MDE group. CONCLUSIONS Patterns and modulating factors of olfactory deficits in acute episode of schizophrenia and MDE are different, their differences should be considered when using olfactory deficits as marker in clinical practice.
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Affiliation(s)
- Ben Chen
- Smell and Taste Clinic, Department of Otorhinolaryngology, TU, Dresden, Germany; Department of Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, China.
| | | | | | - Yuping Ning
- Department of Psychiatry, The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, China
| | - Romain Colle
- INSERM UMR-1178, CESP, Université Paris-Sud, Faculté de Médecine Paris-Sud, Service Hospitalo-Universitaire de Psychiatrie, Assistance Publique-Hôpitaux de Paris, Hôpitaux Universitaires Paris-Sud, Hôpital de Bicêtre, Le Kremlin Bicêtre F-94275, France
| | - Thomas Hummel
- Smell and Taste Clinic, Department of Otorhinolaryngology, TU, Dresden, Germany
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Han P, Zang Y, Akshita J, Hummel T. Magnetic Resonance Imaging of Human Olfactory Dysfunction. Brain Topogr 2019; 32:987-997. [PMID: 31529172 DOI: 10.1007/s10548-019-00729-5] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Accepted: 09/06/2019] [Indexed: 12/11/2022]
Abstract
Olfactory dysfunctions affect a larger portion of population (up to 15% with partial olfactory loss, and 5% with complete olfactory loss) as compared to other sensory dysfunctions (e.g. auditory or visual) and have a negative impact on the life quality. The impairment of olfactory functions may happen at each stage of the olfactory system, from epithelium to cortex. Non-invasive neuroimaging techniques such as the magnetic resonance imaging (MRI) have advanced the understanding of the advent and progress of olfactory dysfunctions in humans. The current review summarizes recent MRI studies on human olfactory dysfunction to present an updated and comprehensive picture of the structural and functional alterations in the central olfactory system as a consequence of olfactory loss and regain. Furthermore, the review also highlights recent progress on optimizing the olfactory functional MRI as well as new approaches for data processing that are promising for future clinical practice.
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Affiliation(s)
- Pengfei Han
- Faculty of Psychology, Southwest University, Chongqing, China. .,Key Laboratory of Cognition and Personality, Ministry of Education, Southwest University, Chongqing, China. .,Department of Otorhinolaryngology, Interdisciplinary Center Smell and Taste, TU Dresden, Dresden, Germany.
| | - Yunpeng Zang
- Department of Otorhinolaryngology, Interdisciplinary Center Smell and Taste, TU Dresden, Dresden, Germany
| | - Joshi Akshita
- Department of Otorhinolaryngology, Interdisciplinary Center Smell and Taste, TU Dresden, Dresden, Germany
| | - Thomas Hummel
- Department of Otorhinolaryngology, Interdisciplinary Center Smell and Taste, TU Dresden, Dresden, Germany
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Kim BY, Park JY, Kim EJ, Kim BG, Kim SW, Kim SW. The neuroplastic effect of olfactory training to the recovery of olfactory system in mouse model. Int Forum Allergy Rhinol 2019; 9:715-723. [PMID: 30793525 PMCID: PMC6767412 DOI: 10.1002/alr.22320] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Revised: 01/08/2019] [Accepted: 01/28/2019] [Indexed: 11/21/2022]
Abstract
Background Several studies have reported the benefits of olfactory training (OT) in the olfactory nervous system of mouse models. Therefore, in this study we performed next‐generation sequencing to evaluate the effects of OT on mRNA sequencing in the olfactory area. Methods Mice in each group were administered 300 mg of 3‐methylindole per kilogram of mouse weight. The olfactory function was evaluated by a food‐finding test once a week. The olfactory neuroepithelium was harvested for histologic examination and protein analysis. Subsequently, data analysis, gene ontology and pathway analysis, quantitative real‐time polymerase chain reaction of mRNA, and Western blot analysis were conducted. Results Mice were divided into 4 groups according to treatment. Control, anosmia, training, and steroid group mice resumed food finding. Olfactory Maker Protein, olfr1507, ADCY3, and GNAL mRNA expression was higher in the olfactory neuroepithelium of OT than anosmia group mice. In total, 26,364 mRNAs were analyzed. Comparison of the results of OT vs anosmia revealed that ADCY8,10, GFAP, NGF, NGFR, GFAP, and BDNF mRNAs were upregulated in the gene ontology. Conclusion OT improved olfactory function, as indicated by the food‐finding test. OT improved the olfactory recovery time to stimulate olfactory nerve regeneration. OT may initially stimulate the olfactory receptor, followed by neurogenesis. Steroid therapy and OT operated under completely different mechanisms in the upregulated gene study. These results indicate that OT may be one of the future modalities for treating olfactory impairment.
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Affiliation(s)
- Boo-Young Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Ju Yeon Park
- Department of Clinical Laboratory, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Eui Jin Kim
- Department of Clinical Laboratory, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Byung Guk Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, St. Paul Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Sung Won Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Soo Whan Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Walsh-Messinger J, Wong PS, Antonius D, McMahon K, Opler LA, Ramirez PM, Malaspina D. Sex differences in hedonic judgement of odors in schizophrenia cases and healthy controls. Psychiatry Res 2018; 269:345-353. [PMID: 30173040 PMCID: PMC6207462 DOI: 10.1016/j.psychres.2018.08.058] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 08/14/2018] [Accepted: 08/16/2018] [Indexed: 01/27/2023]
Abstract
The neurocircuitries subserving affective and olfactory processes overlap, are sexually dimorphic, and show disruptions in schizophrenia, suggesting their intersection may be a window on the core process producing psychosis. This study investigated diagnostic and sex differences in hedonic judgments of odors and smell identification in 26 schizophrenia cases and 27 healthy controls. Associations between olfaction measures and psychiatric symptoms were also examined. Cases and controls had similar identification accuracy of unpleasant odors, but cases were significantly less accurate in naming pleasant odors. In cases, greater negative symptom severity was related to abnormal hedonic judgments; specifically, higher pleasantness ratings for unpleasant odors and higher unpleasantness ratings for pleasant odors. Greater positive symptom severity was associated with lower pleasantness ratings for neutral odors. Regarding sex differences, male cases and female controls rated pleasant odors as significantly more unpleasant than male controls. Correlations between depression severity and pleasantness ratings of neutral odors were in opposite directions in male and female cases. These results suggest that a normal sexual dimorphism in the circuitry for hedonic odor judgments may interact with schizophrenia pathology, supporting the utility of olfactory hedonics as a sex-specific biomarker of this pathology.
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Affiliation(s)
- Julie Walsh-Messinger
- Department of Psychology, University of Dayton, Dayton, OH, USA; Department of Psychiatry, Wright State University Boonshoft School of Medicine, Dayton, OH, USA.
| | - Philip S. Wong
- Department of Psychology, Long Island University, Brooklyn,
NY
| | - Daniel Antonius
- Department of Psychiatry, NYU School of Medicine, New York,
NY,University at Buffalo, State University of NY, Buffalo,
NY,Erie County Forensic Mental Health Services, Buffalo,
NY
| | - Kevin McMahon
- Department of Psychiatry, NYU School of Medicine, New York,
NY
| | - Lewis A. Opler
- Department of Psychology, Long Island University, Brooklyn,
NY
| | | | - Dolores Malaspina
- Departments of Psychiatry, Neuroscience, and Genetics,
Icahn School of Medicine at Mount Sinai, New York, NY
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Depression, Olfaction, and Quality of Life: A Mutual Relationship. Brain Sci 2018; 8:brainsci8050080. [PMID: 29734670 PMCID: PMC5977071 DOI: 10.3390/brainsci8050080] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 05/02/2018] [Accepted: 05/03/2018] [Indexed: 12/29/2022] Open
Abstract
Olfactory dysfunction has been well studied in depression. Common brain areas are involved in depression and in the olfactory process, suggesting that olfactory impairments may constitute potential markers of this disorder. Olfactory markers of depression can be either state (present only in symptomatic phases) or trait (persistent after symptomatic remission) markers. This study presents the etiology of depression, the anatomical links between olfaction and depression, and a literature review of different olfactory markers of depression. Several studies have also shown that olfactory impairment affects the quality of life and that olfactory disorders can affect daily life and may be lead to depression. Thus, this study discusses the links between olfactory processing, depression, and quality of life. Finally, olfaction is an innovative research field that may constitute a new therapeutic tool for the treatment of depression.
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Chen B, Zhong X, Mai N, Peng Q, Wu Z, Ouyang C, Zhang W, Liang W, Wu Y, Liu S, Chen L, Ning Y. Cognitive Impairment and Structural Abnormalities in Late Life Depression with Olfactory Identification Impairment: an Alzheimer's Disease-Like Pattern. Int J Neuropsychopharmacol 2018; 21:640-648. [PMID: 29554341 PMCID: PMC6030850 DOI: 10.1093/ijnp/pyy016] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Accepted: 03/03/2018] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Late-life depression patients are at a high risk of developing Alzheimer's disease, and diminished olfactory identification is an indicator in early screening for Alzheimer's disease in the elderly. However, whether diminished olfactory identification is associated with risk of developing Alzheimer's disease in late-life depression patients remains unclear. METHODS One hundred and twenty-five late-life depression patients, 50 Alzheimer's disease patients, and 60 normal controls were continuously recruited. The participants underwent a clinical evaluation, olfactory test, neuropsychological assessment, and neuroimaging assessment. RESULTS The olfactory identification impairment in late-life depression patients was milder than that in Alzheimer's disease patients. Diminished olfactory identification was significantly correlated with worse cognitive performance (global function, memory language, executive function, and attention) and reduced grey matter volume (olfactory bulb and hippocampus) in the late-life depression patients. According to a multiple linear regression analysis, olfactory identification was significantly associated with the memory scores in late-life depression group (B=1.623, P<.001). The late-life depression with olfactory identification impairment group had worse cognitive performance (global, memory, language, and executive function) and more structural abnormalities in Alzheimer's disease-related regions than the late-life depression without olfactory identification impairment group, and global cognitive function and logical memory in the late-life depression without olfactory identification impairment group was intact. Reduced volume observed in many areas (hippocampus, precuneus, etc.) in the Alzheimer's disease group was also observed in late-life depression with olfactory identification impairment group but not in the late-life depression without olfactory identification impairment group. CONCLUSION The patterns of cognitive impairment and structural abnormalities in late-life depression with olfactory identification impairment patients were similar to those in Alzheimer's disease; olfactory identification may help identify late-life depression patients who are at a high risk of developing Alzheimer's disease.
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Affiliation(s)
- Ben Chen
- Department of Psychiatrym, The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Huiai Hospital, Guangzhou City, China
| | - Xiaomei Zhong
- Department of Psychiatrym, The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Huiai Hospital, Guangzhou City, China,Department of Neurology, The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Huiai Hospital, Guangzhou City, China
| | - Naikeng Mai
- Department of Neurology, The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Huiai Hospital, Guangzhou City, China
| | - Qi Peng
- Department of Neurology, The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Huiai Hospital, Guangzhou City, China
| | - Zhangying Wu
- Department of Psychiatrym, The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Huiai Hospital, Guangzhou City, China
| | - Cong Ouyang
- Department of Psychiatrym, The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Huiai Hospital, Guangzhou City, China
| | - Weiru Zhang
- Department of Psychiatrym, The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Huiai Hospital, Guangzhou City, China
| | | | - Yujie Wu
- Department of Psychiatrym, The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Huiai Hospital, Guangzhou City, China
| | - Sha Liu
- Department of Radiology, The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Huiai Hospital, Guangzhou City, China
| | - Lijian Chen
- Department of Neurology, The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Huiai Hospital, Guangzhou City, China
| | - Yuping Ning
- Department of Neurology, The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou Huiai Hospital, Guangzhou City, China,Correspondence: Ning Yuping, PhD, no. 36, Mingxin Road, Liwan District, Guangzhou City, China ()
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Gasser AI, Salamin V, Zumbach S. Dépression de la personne âgée ou maladie d’Alzheimer prodromique : quels outils pour le diagnostic différentiel ? Encephale 2018; 44:52-58. [DOI: 10.1016/j.encep.2017.03.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 02/25/2017] [Accepted: 03/01/2017] [Indexed: 01/23/2023]
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Atanasova B, Mondon K, Dreyfuss L, Beaufils E, Desmidt T, Hommet C, El-Hage W, Belzung C. Hedonic Assessment of Odors: A Comparison of Two Sensory Scales for Use with Alzheimer’s Disease Patients and Elderly Individuals. J Alzheimers Dis 2018; 61:929-938. [DOI: 10.3233/jad-170433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Boriana Atanasova
- INSERM U1253, Université François-Rabelais de Tours, Tours, France
- UFR Sciences et Techniques, Université François-Rabelais de Tours, Tours, France
| | - Karl Mondon
- INSERM U1253, Université François-Rabelais de Tours, Tours, France
- Service de médecine interne Gériatrique, Centre Mémoire de Ressources et de Recherche, Centre Hospitalier Régional Universitaire, Tours, France
| | - Lise Dreyfuss
- UFR Sciences et Techniques, Université François-Rabelais de Tours, Tours, France
- BIOFORTIS Sensory and Consumer, Saint Herblain, France
| | - Emilie Beaufils
- INSERM U1253, Université François-Rabelais de Tours, Tours, France
- Service de médecine interne Gériatrique, Centre Mémoire de Ressources et de Recherche, Centre Hospitalier Régional Universitaire, Tours, France
| | - Thomas Desmidt
- INSERM U1253, Université François-Rabelais de Tours, Tours, France
- Service de médecine interne Gériatrique, Centre Mémoire de Ressources et de Recherche, Centre Hospitalier Régional Universitaire, Tours, France
| | - Caroline Hommet
- INSERM U1253, Université François-Rabelais de Tours, Tours, France
- Service de médecine interne Gériatrique, Centre Mémoire de Ressources et de Recherche, Centre Hospitalier Régional Universitaire, Tours, France
| | - Wissam El-Hage
- INSERM U1253, Université François-Rabelais de Tours, Tours, France
- Clinique Psychiatrique Universitaire, Centre Hospitalier Régional Universitaire de Tours, Tours, France
| | - Catherine Belzung
- INSERM U1253, Université François-Rabelais de Tours, Tours, France
- UFR Sciences et Techniques, Université François-Rabelais de Tours, Tours, France
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Antidepressant Flavonoids and Their Relationship with Oxidative Stress. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:5762172. [PMID: 29410733 PMCID: PMC5749298 DOI: 10.1155/2017/5762172] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 11/22/2017] [Indexed: 12/25/2022]
Abstract
Depression is a serious disorder that affects hundreds of millions of people around the world and causes poor quality of life, problem behaviors, and limitations in activities of daily living. Therefore, the search for new therapeutic options is of high interest and growth. Research on the relationship between depression and oxidative stress has shown important biochemical aspects in the development of this disease. Flavonoids are a class of natural products that exhibit several pharmacological properties, including antidepressant-like activity, and affects various physiological and biochemical functions in the body. Studies show the clinical potential of antioxidant flavonoids in treating depressive disorders and strongly suggest that these natural products are interesting prototype compounds in the study of new antidepressant drugs. So, this review will summarize the chemical and pharmacological perspectives related to the discovery of flavonoids with antidepressant activity. The mechanisms of action of these compounds are also discussed, including their actions on oxidative stress relating to depression.
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Murr J, Hummel T, Ritschel G, Croy I. Individual Significance of Olfaction: A Comparison Between Normosmic and Dysosmic People. PSYCHOSOMATICS 2017; 59:283-292. [PMID: 29397144 DOI: 10.1016/j.psym.2017.11.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2017] [Revised: 11/22/2017] [Accepted: 11/27/2017] [Indexed: 11/28/2022]
Abstract
BACKGROUND Olfactory dysfunction is common in older individuals. The importance of such dysfunction to individuals is highly variable: many people do not seem to care about their olfactory dysfunction, others suffer and complain about problems in daily life, a reduced quality of life, or symptoms of depression. OBJECTIVE Understanding the importance of olfaction for different age groups in normosmic as well as in smell-disordered subjects may help to find reasons for insufficient coping with olfactory dysfunction. METHODS We used a questionnaire to capture the individual importance of olfaction in a sample of 433 normosmic and 172 dysosmic people from 15-82 years of age. Furthermore, all participants underwent standardized assessment of olfactory function. RESULTS The importance of olfaction was highest in the group of young (≤25-year-old) normosmic women. Dysosmia was associated with a decreased importance of olfaction, irrespective of age. However, 18 % of the dysosmic patients showed a tendency to aggravate their symptoms. This high degree of aggravation could not be explained by sex, age, or severity of olfactory dysfunction. CONCLUSIONS The high importance of olfaction observed in young women may reflect the specific needs of this group, such as mate selection and child care. The strongly reduced importance of olfaction in dysosmic subjects seems to serve as an adaptive coping mechanism. A tendency to aggravate symptoms may indicate insufficient coping. Hence, detecting high aggravation could be a first step to recognizing high psychological strain and the need for psychotherapeutic treatment.
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Affiliation(s)
- Julia Murr
- Department of Psychotherapy and Psychosomatic Medicine, Technical University of Dresden, Dresden, Germany.
| | - Thomas Hummel
- Department of Otorhinolaryngology, Smell & Taste Clinic, Technical University of Dresden, Dresden, Germany
| | - Gerhard Ritschel
- Department of Psychotherapy and Psychosomatic Medicine, Technical University of Dresden, Dresden, Germany
| | - Ilona Croy
- Department of Psychotherapy and Psychosomatic Medicine, Technical University of Dresden, Dresden, Germany
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Gulyaeva NV, Bobkova NV, Kolosova NG, Samokhin AN, Stepanichev MY, Stefanova NA. Molecular and Cellular Mechanisms of Sporadic Alzheimer's Disease: Studies on Rodent Models in vivo. BIOCHEMISTRY (MOSCOW) 2017; 82:1088-1102. [PMID: 29037130 DOI: 10.1134/s0006297917100029] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
In this review, recent data are presented on molecular and cellular mechanisms of pathogenesis of the most widespread (about 95%) sporadic forms of Alzheimer's disease obtained on in vivo rodent models. Although none of the available models can fully reproduce the human disease, several key molecular mechanisms (such as dysfunction of neurotransmitter systems, especially of the acetylcholinergic system, β-amyloid toxicity, oxidative stress, neuroinflammation, mitochondrial dysfunction, disturbances in neurotrophic systems) are confirmed with different models. Injection models, olfactory bulbectomy, and senescence accelerated OXYS rats are reviewed in detail. These three approaches to in vivo modeling of sporadic Alzheimer's disease have demonstrated a considerable similarity in molecular and cellular mechanisms of pathology development. Studies on these models provide complementary data, and each model possesses its specific advantages. A general analysis of the data reported for the three models provides a multifaceted and the currently most complete molecular picture of sporadic Alzheimer's disease. This is highly relevant also from the practical viewpoint because it creates a basis for elaboration and preclinical studies of means for treatment of this disease.
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Affiliation(s)
- N V Gulyaeva
- Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow, 117485, Russia.
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Saavedra J. Beneficial effects of Angiotensin II receptor blockers in brain disorders. Pharmacol Res 2017; 125:91-103. [DOI: 10.1016/j.phrs.2017.06.017] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 06/17/2017] [Accepted: 06/28/2017] [Indexed: 12/11/2022]
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The Role of Food Antioxidants, Benefits of Functional Foods, and Influence of Feeding Habits on the Health of the Older Person: An Overview. Antioxidants (Basel) 2017; 6:antiox6040081. [PMID: 29143759 PMCID: PMC5745491 DOI: 10.3390/antiox6040081] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 10/17/2017] [Accepted: 10/18/2017] [Indexed: 02/07/2023] Open
Abstract
This overview was directed towards understanding the relationship of brain functions with dietary choices mainly by older humans. This included food color, flavor, and aroma, as they relate to dietary sufficiency or the association of antioxidants with neurodegenerative diseases such as dementia and Alzheimer’s disease. Impairment of olfactory and gustatory function in relation to these diseases was also explored. The role of functional foods was considered as a potential treatment of dementia and Alzheimer’s disease through inhibition of acetylcholinesterase as well as similar treatments based on herbs, spices and antioxidants therein. The importance of antioxidants for maintaining the physiological functions of liver, kidney, digestive system, and prevention of cardiovascular diseases and cancer has also been highlighted. Detailed discussion was focused on health promotion of the older person through the frequency and patterns of dietary intake, and a human ecology framework to estimate adverse risk factors for health. Finally, the role of the food industry, mass media, and apps were explored for today’s new older person generation.
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Kazour F, Richa S, Desmidt T, Lemaire M, Atanasova B, El Hage W. Olfactory and gustatory functions in bipolar disorders: A systematic review. Neurosci Biobehav Rev 2017; 80:69-79. [DOI: 10.1016/j.neubiorev.2017.05.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2017] [Accepted: 05/09/2017] [Indexed: 01/01/2023]
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Brand G, Schaal B. [Olfaction in depressive disorders: Issues and perspectives]. Encephale 2016; 43:176-182. [PMID: 27623124 DOI: 10.1016/j.encep.2016.04.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Revised: 03/10/2016] [Accepted: 04/05/2016] [Indexed: 11/15/2022]
Abstract
Research on sensorial interactions with psychiatric diseases and particularly with the depressive syndrome has mainly focused on visual or auditory processes and much less on olfaction. The depressive illness is one of the most frequent psychiatric diagnoses in the community, with approximately one in five women and one in eight men experiencing a major depressive episode during their lifetime. Although genetic, epigenetic, neuroanatomical, neurochemical, neuroendocrinological and neuroimmunological changes can be detected during depression, the etiology of depression remains partly unclear. The current explanatory models are based on two main factors, i.e. pharmacological dysfunctions and stress effects. In this way and because of strong connections between olfactory pathways and cerebral areas implied in mood regulation and emotions (i.e. the limbic system and prefrontal areas), the interactions between olfaction and depression could constitute a relevant way of research at three different levels. First, olfactory dysfunction observed in depression could serve the diagnosis and contribute to a better understanding of mechanisms implied in thymic pathologies. Published papers show a decrease of olfactory sensitivity in major depression which does not occur in bipolar or saisonal depression. Second, it has been shown that olfactory deficits could induce depressive symptoms. In this context, an animal model (olfactory bulbectomized rat) reinforces the hypothesis of the important role of olfaction in depression based on neuroanatomical and neurochemical observations. Third, several publications have demonstrated that odors can positively impact the depressive mood. Thus, a remediation by odors in depression appears to be a promising way. From several decades, the olfaction/depression interactions have been covered by a broad literature. Thus, the present review will not propose an exhaustive examination but aims to point out the most recently published papers and highlight their contributions to the understanding of olfactory processes implied in depression.
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Affiliation(s)
- G Brand
- Département neurosciences, université de Bourgogne-Franche-Comté, place Leclerc, 25000 Besançon, France; Centre des sciences du goût et de l'alimentation, CNRS, laboratoire d'éthologie développementale et de psychologie cognitive, université de Bourgogne-Franche-Comté (UMR 6265), 9E, boulevard Jeanne-d'Arc, 21000 Dijon, France.
| | - B Schaal
- Centre des sciences du goût et de l'alimentation, CNRS, laboratoire d'éthologie développementale et de psychologie cognitive, université de Bourgogne-Franche-Comté (UMR 6265), 9E, boulevard Jeanne-d'Arc, 21000 Dijon, France.
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Caminiti F, De Salvo S, Nunnari D, Bramanti P, Ciurleo R, Granata F, Marino S. Effect of the antiepileptic therapy on olfactory disorders associated with mesial temporal sclerosis. Neurocase 2016; 22:357-61. [PMID: 27347726 DOI: 10.1080/13554794.2016.1176203] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Parosmia has been described in neurological disorders, including temporal epilepsy. We reported a case of parosmia associated with unilateral hyposmia and mesial temporal sclerosis. We assessed the olfactory function by using Sniffin' sticks test and olfactory event-related potentials (OERPs). The findings of unilateral deficit of identification associated with parosmia only in the side ipsilateral to mesial temporal sclerosis area, that involves temporal olfactory regions responsible for higher level of smell processing, suggest a central genesis of olfactory disorders. The administration of levetiracetam restored olfactory function, OERP N1-P2 amplitude, and mesial temporal sclerosis-related electroencephalographic findings.
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Affiliation(s)
| | | | | | | | | | - Francesca Granata
- b Department of Biomedical Sciences and Morphological and Functional Imaging , University of Messina , Messina , Italy
| | - Silvia Marino
- a IRCCS Centro Neurolesi "Bonino-Pulejo" , Messina , Italy.,b Department of Biomedical Sciences and Morphological and Functional Imaging , University of Messina , Messina , Italy
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