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Canet G, Monteiro FDG, Rocaboy E, Diego-Diaz S, Khelaifia B, Kim J, Valencia D, Yin A, Wu HT, Howell J, Blank E, Laliberté F, Fortin N, Boscher E, Fereydouni-Forouzandeh P, Champagne S, Guisle I, Hébert S, Pernet V, Liu H, Lu W, Debure L, Rapoport D, Ayappa I, Varga A, Parekh A, Osorio R, Lacroix S, Lucey B, Blessing E, Planel E. Sleep-wake body temperature regulates tau secretion in mice and correlates with CSF and plasma tau in humans. RESEARCH SQUARE 2024:rs.3.rs-4384494. [PMID: 38798432 PMCID: PMC11118695 DOI: 10.21203/rs.3.rs-4384494/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
The sleep-wake cycle regulates interstitial fluid and cerebrospinal fluid (CSF) tau levels in both mouse and human by mechanisms that remain unestablished. Here, we reveal a novel pathway by which wakefulness increases extracellular tau levels in mouse and humans. In mice, higher body temperature (BT) associated with wakefulness and sleep deprivation increased CSF tau. In vitro, wakefulness temperatures upregulated tau secretion via a temperature-dependent increase in activity and expression of unconventional protein secretion pathway-1 components, namely caspase-3-mediated C-terminal cleavage of tau (TauC3), and membrane expression of PIP2 and syndecan-3. In humans, the increase in both CSF and plasma tau levels observed post-wakefulness correlated with BT increase during wakefulness. Our findings suggest sleep-wake variation in BT may contribute to regulating extracellular tau levels, highlighting the importance of thermoregulation in pathways linking sleep disturbance to neurodegeneration, and the potential for thermal intervention to prevent or delay tau-mediated neurodegeneration.
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Affiliation(s)
| | | | - Emma Rocaboy
- Research Center of CHU de Quebec - Laval University
| | | | | | - Jessica Kim
- Department of Psychiatry, NYU Grossman School of Medicine
| | - Daphne Valencia
- Mount Sinai Integrative Sleep Center, Division of Pulmonary, Critical Care, and Sleep Medicine, Icahn School of Medicine at Mount Sinai
| | - Audrey Yin
- Department of Psychiatry, NYU Grossman School of Medicine
| | - Hau-Tieng Wu
- Department of Psychiatry, NYU Grossman School of Medicine
| | - Jordan Howell
- Department of Psychiatry, NYU Grossman School of Medicine
| | - Emily Blank
- Department of Psychiatry, NYU Grossman School of Medicine
| | | | - Nadia Fortin
- Research Center of CHU de Quebec - Laval University
| | - Emmanuelle Boscher
- Centre de recherche du CHU de Québec-Université Laval, CHUL, Axe Neurosciences, Faculté de médecine, Département de psychiatrie et de neurosciences, Québec, C
| | | | | | | | - Sébastien Hébert
- Centre de recherche du CHU de Québec - Université Laval, Axe neurosciences, Québec
| | | | | | - William Lu
- Department of Neurology, Washington University School of Medicine
| | | | - David Rapoport
- Mount Sinai Integrative Sleep Center, Division of Pulmonary, Critical Care, and Sleep Medicine, Icahn School of Medicine at Mount Sinai
| | - Indu Ayappa
- Mount Sinai Integrative Sleep Center, Division of Pulmonary, Critical Care, and Sleep Medicine, Icahn School of Medicine at Mount Sinai
| | - Andrew Varga
- Mount Sinai Integrative Sleep Center, Division of Pulmonary, Critical Care, and Sleep Medicine, Icahn School of Medicine at Mount Sinai
| | - Ankit Parekh
- Mount Sinai Integrative Sleep Center, Division of Pulmonary, Critical Care, and Sleep Medicine, Icahn School of Medicine at Mount Sinai
| | | | | | - Brendan Lucey
- Department of Neurology, Washington University School of Medicine
| | | | - Emmanuel Planel
- Centre de recherche du CHU de Québec - Université Laval, Axe neurosciences, Québec
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Son G, Neylan TC, Grinberg LT. Neuronal and glial vulnerability of the suprachiasmatic nucleus in tauopathies: evidence from human studies and animal models. Mol Neurodegener 2024; 19:4. [PMID: 38195580 PMCID: PMC10777507 DOI: 10.1186/s13024-023-00695-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 12/08/2023] [Indexed: 01/11/2024] Open
Abstract
Tauopathies, a group of neurodegenerative diseases that includes Alzheimer's disease, commonly lead to disturbances in sleep-wake patterns and circadian rhythm disorders. The circadian rhythm, a recurring 24-hour cycle governing human biological activity, is regulated by the hypothalamic suprachiasmatic nucleus (SCN) and endogenous transcriptional-translational feedback loops. Surprisingly, little attention has been given to investigating tauopathy-driven neuropathology in the SCN and the repercussions of SCN and circadian gene dysfunction in the human brain affected by tauopathies. This review aims to provide an overview of the current literature on the vulnerability of the SCN in tauopathies in humans. Emphasis is placed on elucidating the neuronal and glial changes contributing to the widespread disruption of the molecular circadian clock. Furthermore, this review identifies areas of knowledge requiring further investigation.
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Affiliation(s)
- Gowoon Son
- Memory and Aging Center, Weill Institute for Neurosciences, Department of Neurology, University of California, San Francisco, San Francisco, CA, USA
| | - Thomas C Neylan
- Memory and Aging Center, Weill Institute for Neurosciences, Department of Neurology, University of California, San Francisco, San Francisco, CA, USA
- Department of Psychiatry, University of California, San Francisco, San Francisco, CA, USA
| | - Lea T Grinberg
- Memory and Aging Center, Weill Institute for Neurosciences, Department of Neurology, University of California, San Francisco, San Francisco, CA, USA.
- Global Brain Health Institute, University of California, San Francisco, San Francisco, CA, USA.
- Department of Pathology, University of Sao Paulo Medical School, Sao Paulo, Brazil.
- Department of Pathology, University of California, San Francisco, San Francisco, CA, USA.
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Tolbert TM, Schoenholz RL, Parekh A, Berkalieva A, Osorio RS, Ayappa I, Rapoport DM. Night-to-night reliability and agreement of obstructive sleep apnea pathophysiologic mechanisms estimated with phenotyping using polysomnography in cognitively normal elderly participants. Sleep 2023; 46:zsad058. [PMID: 36881682 PMCID: PMC10848222 DOI: 10.1093/sleep/zsad058] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 01/12/2023] [Indexed: 03/09/2023] Open
Abstract
STUDY OBJECTIVES Phenotyping using polysomnography (PUP) is an algorithmic method to quantify physiologic mechanisms underlying obstructive sleep apnea (OSA): loop gain (LG1), arousal threshold (ArTH), and upper airway collapsibility (Vpassive) and muscular compensation (Vcomp). The consecutive-night test-retest reliability and agreement of PUP-derived estimates are unknown. From a cohort of elderly (age ≥55 years), largely non-sleepy, community-dwelling volunteers who underwent in-lab polysomnography (PSG) on 2 consecutive nights, we determined the test-retest reliability and agreement of PUP-estimated physiologic factors. METHODS Participants who had an apnea-hypopnea index (AHI3A) of at least 15 events per hour on the first night were included. PUP analyses were performed on each of the two PSGs from each participant. Physiologic factor estimates were derived from NREM sleep and compared across nights using intraclass correlation coefficients for reliability and smallest real differences (SRD) for agreement. RESULTS Two PSGs from each of 43 participants (86 total) were analyzed. A first-night effect was evident with increased sleep time and stability and decreased OSA severity on the second night. LG1, ArTH, and Vpassive demonstrated good reliability (ICC > 0.80). Vcomp had modest reliability (ICC = 0.67). For all physiologic factors, SRD values were approximately 20% or more of the observed ranges, suggesting limited agreement of longitudinal measurements for a given individual. CONCLUSIONS For NREM sleep in cognitively normal elderly individuals with OSA, PUP-estimated LG1, ArTH, and Vpassive demonstrated consistent relative ranking of individuals (good reliability) on short-term repeat measurement. For all physiologic factors, longitudinal measurements demonstrated substantial intraindividual variability across nights (limited agreement).
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Affiliation(s)
- Thomas M Tolbert
- Division of Pulmonary, Critical Care, and Sleep Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Reagan L Schoenholz
- Division of Pulmonary, Critical Care, and Sleep Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Ankit Parekh
- Division of Pulmonary, Critical Care, and Sleep Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Asem Berkalieva
- Institute for Healthcare Delivery Science, Department of Population Health Science and Policy, Icahn School of Medicine at Mount Sinai, Institute for Healthcare Delivery Science, New York, NY, USA
| | - Ricardo S Osorio
- Department of Psychiatry, NYU Grossman School of Medicine, Healthy Brain Aging and Sleep Center, New York, NY, USA
| | - Indu Ayappa
- Division of Pulmonary, Critical Care, and Sleep Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - David M Rapoport
- Division of Pulmonary, Critical Care, and Sleep Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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Alagiakrishnan K, Dhami P, Senthilselvan A. Predictors of Conversion to Dementia in Patients With Mild Cognitive Impairment: The Role of Low Body Temperature. J Clin Med Res 2023; 15:216-224. [PMID: 37187716 PMCID: PMC10181356 DOI: 10.14740/jocmr4883] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Accepted: 03/30/2023] [Indexed: 05/17/2023] Open
Abstract
Background Subjects with mild cognitive impairment (MCI) can progress to dementia. Studies have shown that neuropsychological tests, biological or radiological markers individually or in combination have helped to determine the risk of conversion from MCI to dementia. These techniques are complex and expensive, and clinical risk factors were not considered in these studies. This study examined demographic, lifestyle and clinical factors including low body temperature that may play a role in the conversion of MCI to dementia in elderly patients. Methods In this retrospective study, a chart review was conducted on patients aged 61 to 103 years who were seen at the University of Alberta Hospital. Information on onset of MCI and demographic, social, and lifestyle factors, family history of dementia and clinical factors, and current medications at baseline was collected from patient charts on an electronic database. The conversion from MCI to dementia within 5.5 years was also determined. Logistic regression analysis was conducted to identify the baseline factors associated with conversion from MCI to dementia. Results The prevalence of MCI at baseline was 25.6% (335/1,330). During the 5.5 years follow-up period, 43% (143/335) of the subjects converted to dementia from MCI. The factors that were significantly associated with conversion from MCI to dementia were family history of dementia (odds ratio (OR): 2.78, 95% confidence interval (CI): 1.56 - 4.95, P = 0.001), Montreal cognitive assessment (MoCA) score (OR: 0.91, 95% CI: 0.85 - 0.97, P = 0.01), and low body temperature (below 36 °C) (OR: 10.01, 95% CI: 3.59 - 27.88, P < 0.001). Conclusion In addition to family history of dementia and MoCA, low body temperature was shown to be associated with the conversion from MCI to dementia. This study would help clinicians to identify patients with MCI who are at highest risk of conversion to dementia.
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Affiliation(s)
- Kannayiram Alagiakrishnan
- Division of Geriatric Medicine, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada
- Corresponding Author: Kannayiram Alagiakrishnan, Clinical Sciences Building, University of Alberta Hospital, Edmonton, AB T6G 2P4, Canada.
| | - Prabhpaul Dhami
- Department of Medicine, University of Alberta, Edmonton, Alberta, Canada
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