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Delitala AP, Manzocco M, Sinibaldi FG, Fanciulli G. Thyroid function in elderly people: The role of subclinical thyroid disorders in cognitive function and mood alterations. Int J Clin Pract 2018; 72:e13254. [PMID: 30216651 DOI: 10.1111/ijcp.13254] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 08/01/2018] [Accepted: 08/04/2018] [Indexed: 01/06/2023] Open
Affiliation(s)
- Alessandro P Delitala
- U.O.C. di Medicina Interna 2 (Clinica Medica), Azienda Ospedaliero-Universitaria di Sassari, Sassari, Italy
| | - Marta Manzocco
- Department of Clinical and Experimental Medicine, University of Sassari, Sassari, Italy
| | - Federico G Sinibaldi
- Department of Clinical and Experimental Medicine, University of Sassari, Sassari, Italy
| | - Giuseppe Fanciulli
- Department of Clinical and Experimental Medicine, University of Sassari, Sassari, Italy
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Kostev K, Hadji P, Jacob L. Impact of Osteoporosis on the Risk of Dementia in Almost 60,000 Patients Followed in General Practices in Germany. J Alzheimers Dis 2018; 65:401-407. [DOI: 10.3233/jad-180569] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
| | | | - Louis Jacob
- Faculty of Medicine, University of Paris 5, Paris, France
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Burke SL, Cadet T, Maddux M. Chronic Health Illnesses as Predictors of Mild Cognitive Impairment Among African American Older Adults. J Natl Med Assoc 2018; 110:314-325. [PMID: 30126555 PMCID: PMC6108440 DOI: 10.1016/j.jnma.2017.06.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2017] [Revised: 06/14/2017] [Accepted: 06/21/2017] [Indexed: 12/19/2022]
Abstract
Approximately 5.5 million individuals are diagnosed with Alzheimer's disease (AD) dementia, a number which includes those with mild cognitive impairment and asymptomatic individuals with biomarkers of AD. There is a higher incidence of mild cognitive impairment (MCI) in African American populations as compared to White populations, even when controlling for sociodemographic factors. The existing body of ethnically/racially targeted research on MCI has been limited by few studies with the ability to generalize to African American communities. This study sought to examine whether medical conditions which occur at a higher rate in African American individuals increase the hazard of subsequent MCI development. A secondary data analysis of the National Alzheimer's Coordinating Center Uniform Data Set was employed to examine the associations between health conditions (congestive heart failure, traumatic brain injury, diabetes, hypertension, hypercholesterolemia, B12 deficiency, thyroid disease) and their relationship to MCI. The analytic sample included 2847 participants with 9872 observations. Binary logistic generalized estimating equation modeling was used to examine repeated measures over the course of 1-11 observations. Education was associated with MCI development, specifically those with some college or college graduates (p < 0.001) and more than college (p = 0.002). Female sex was associated with development of MCI (p < 0.001). African Americans with traumatic brain injury (TBI) were more likely to develop MCI (p < 0.001) compared to those with no reports of a TBI. Inactive thyroid conditions decreased the risk of MCI development (p = 0.005) compared to those without thyroid disease. Though vascular factors are often attributed to higher mortality and neurodegeneration in African Americans, congestive heart failure, diabetes, high cholesterol, hypertension, diabetes, nor seizures were associated with an increased risk of MCI development. Findings from this study provide formative data to develop targeted interventions for subsets of the African American community, including those with higher educational levels, those with TBI, and those with a history of thyroid disease. While it may not be possible to prevent MCI development, it is possible to modify lifestyle behaviors contributing to these health conditions, such as falls that are often experienced by older adults. Practitioners can increase awareness, knowledge, and resources relevant to clients.
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Affiliation(s)
- Shanna L Burke
- Florida International University, Robert Stempel College of Public Health and Social Work, School of Social Work, 11200 S.W. 8th Street, AHC5 564 Miami, FL 33199, USA.
| | - Tamara Cadet
- Simmons College School of Social Work, HSDM-Oral Health Policy and Epidemiology, Harvard School of Dental Medicine, USA
| | - Marlaina Maddux
- Florida International University, Robert Stempel College of Public Health and Social Work, School of Social Work, 11200 S.W. 8th Street, AHC5 564 Miami, FL 33199, USA
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Bavarsad K, Hadjzadeh MAR, Hosseini M, Pakdel R, Beheshti F, Bafadam S, Ashaari Z. Effects of levothyroxine on learning and memory deficits in a rat model of Alzheimer’s disease: the role of BDNF and oxidative stress. Drug Chem Toxicol 2018; 43:57-63. [DOI: 10.1080/01480545.2018.1481085] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Kowsar Bavarsad
- Student Research Committee, Department of Physiology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
- Department of Physiology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mousa-Al-Reza Hadjzadeh
- Division of Neurocognitive Sciences, Psychiatry and Behavioral Sciences Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mahmoud Hosseini
- Neurogenic Inflammation Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Roghayeh Pakdel
- Research Center of Physiology, Semnan University of Medical Sciences, Semnan, Iran
| | - Farimah Beheshti
- Department of Basic Sciences and Neuroscience Research Center, Torbat Heydariyeh University of Medical Sciences, Torbat Heydariyeh, Iran
| | - Soleyman Bafadam
- Department of Physiology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Zeinab Ashaari
- Department of Physiology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
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Yang F, Ma H, Butler MR, Ding XQ. Deficiency of type 2 iodothyronine deiodinase reduces necroptosis activity and oxidative stress responses in retinas of Leber congenital amaurosis model mice. FASEB J 2018; 32:fj201800484RR. [PMID: 29874126 PMCID: PMC6181634 DOI: 10.1096/fj.201800484rr] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Accepted: 05/14/2018] [Indexed: 02/06/2023]
Abstract
Thyroid hormone (TH) signaling has been shown to regulate cone photoreceptor viability. Suppression of TH signaling with antithyroid drug treatment or by targeting iodothyronine deiodinases and TH receptors preserves cones in mouse models of retinal degeneration, including the Leber congenital amaurosis Rpe65-deficient mice. This work investigates the cellular mechanisms underlying how suppressing TH signaling preserves cones in Rpe65-deficient mice, using mice deficient in type 2 iodothyronine deiodinase (Dio2), the enzyme that converts the prohormone thyroxine to the active hormone triiodothyronine (T3). Deficiency of Dio2 improved cone survival and function in Rpe65-/- and Rpe65-deficiency on a cone dominant background ( Rpe65-/-/ Nrl-/-) mice. Analysis of cell death pathways revealed that receptor-interacting serine/threonine-protein kinase (RIPK)/necroptosis activity was increased in Rpe65-/-/ Nrl-/- retinas, and Dio2 deficiency reversed the alterations. Cell-stress analysis showed that the cellular oxidative stress responses were increased in Rpe65-/-/ Nrl-/- retinas, and Dio2 deficiency abolished the elevations. Similarly, antithyroid drug treatment resulted in reduced RIPK/necroptosis activity and oxidative stress responses in Rpe65-/-/ Nrl-/- retinas. Moreover, treatment with T3 significantly induced RIPK/necroptosis activity and oxidative stress responses in the retina. This work shows that suppression of TH signaling reduces cellular RIPK/necroptosis activity and oxidative stress responses in degenerating retinas, suggesting a mechanism underlying the observed cone preservation.-Yang, F., Ma, H., Butler, M. R., Ding, X.-Q. Deficiency of type 2 iodothyronine deiodinase reduces necroptosis activity and oxidative stress responses in retinas of Leber congenital amaurosis model mice.
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Affiliation(s)
- Fan Yang
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Hongwei Ma
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Michael R. Butler
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Xi-Qin Ding
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
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Kumar M, Modi S, Rana P, Kumar P, Kanwar R, Sekhri T, D'souza M, Khushu S. Alteration in intrinsic and extrinsic functional connectivity of resting state networks associated with subclinical hypothyroid. J Neuroendocrinol 2018; 30. [PMID: 29504670 DOI: 10.1111/jne.12587] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Accepted: 02/27/2018] [Indexed: 11/28/2022]
Abstract
Subclinical hypothyroidism (SCH) is characterized by mild elevation of thyroid stimulating hormone (TSH) (range 5-10 μIU/ml) and normal free triiodothyronine (FT3) and free thyroxine (FT4). The cognitive function impairment is well known in thyroid disorders such as hypothyroidism and hyperthyroidism, but little is known about deficits in brain functions in SCH subjects. Also, whether hormone-replacement treatment is necessary or not in SCH subjects is still debatable. In order to have an insight into the cognition of SCH subjects, intrinsic and extrinsic functional connectivity (FC) of the resting state networks (RSNs) was studied. For resting state data analysis we used an unbiased, data-driven approach based on Independent Component Analysis (ICA) and dual-regression that can emphasize widespread changes in FC without restricting to a set of predefined seeds. 28 SCH subjects and 28 matched healthy controls (HC) participated in the study. RSN analysis showed significantly decreased intrinsic FC in somato-motor network (SMN) and right fronto-parietal attention network (RAN) and increased intrinsic FC in default mode network (DMN) in SCH subjects as compared to control subjects. The reduced intrinsic FC in the SMN and RAN suggests neuro-cognitive alterations in SCH subjects in the corresponding functions which were also evident from the deficit in the neuropsychological performance of the SCH subjects on behavioural tests such as digit span, delayed recall, visual retention, recognition, Bender Gestalt and Mini-Mental State Examination (MMSE). We also found a significant reduction in extrinsic network FC between DMN and RAN; SMN and posterior default mode network (PDMN); and increased extrinsic FC between SMN and anterior default mode network (ADMN) in SCH subjects as compared to controls. An altered extrinsic FC in SCH suggests functional reorganization in response to neurological disruption. The partial correlation analysis between intrinsic and extrinsic RSNs FC and neuropsychological performances as well as clinical indices give interesting insights into brain-behavior relationship in SCH subjects. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Mukesh Kumar
- NMR Research Centre, Institute of Nuclear Medicine and Allied Sciences (INMAS)
| | - Shilpi Modi
- NMR Research Centre, Institute of Nuclear Medicine and Allied Sciences (INMAS)
| | - Poonam Rana
- NMR Research Centre, Institute of Nuclear Medicine and Allied Sciences (INMAS)
| | - Pawan Kumar
- NMR Research Centre, Institute of Nuclear Medicine and Allied Sciences (INMAS)
| | - Ratnesh Kanwar
- Thyroid Research Centre, (INMAS), Brig. SK Mazumdar Marg, Timarpur, Delhi, India, 110054
| | - Tarun Sekhri
- Thyroid Research Centre, (INMAS), Brig. SK Mazumdar Marg, Timarpur, Delhi, India, 110054
| | - Maria D'souza
- NMR Research Centre, Institute of Nuclear Medicine and Allied Sciences (INMAS)
| | - Subash Khushu
- NMR Research Centre, Institute of Nuclear Medicine and Allied Sciences (INMAS)
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Bojar I, Stasiak M, Cyniak-Magierska A, Raczkiewicz D, Lewiński A. Cognitive Function, APOE Gene Polymorphisms, and Thyroid Status Associations in Postmenopausal Women in Poland. Dement Geriatr Cogn Disord 2018; 42:169-185. [PMID: 27649316 DOI: 10.1159/000449373] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/01/2016] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND The objective of the study was to analyze a potential association between cognitive functions and thyroid status in postmenopausal women with different polymorphisms of the apolipoprotein E gene (APOE). METHODS The examined population included 402 postmenopausal women from south-eastern Poland. The evaluation of cognitive functions was made with the use of the diagnostic Central Nervous System-Vital Signs equipment (Polish version). Multiplex polymerase chain reactions were performed to assess APOE polymorphisms. The thyroid hormone tests were assessed by an accredited laboratory. RESULTS AND CONCLUSION Lower results of cognitive functions were associated with the presence of the ε4 APOE allele in postmenopausal women. The ε4 APOE polymorphism was associated with a higher concentration of thyroid-stimulating hormone and lower concentrations of free triiodothyronine and total triiodothyronine.
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Affiliation(s)
- Iwona Bojar
- Department for Health Problems of Ageing, Institute of Rural Health, Lublin, Poland
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Szlejf C, Suemoto CK, Santos IS, Lotufo PA, Haueisen Sander Diniz MDF, Barreto SM, Benseñor IM. Thyrotropin level and cognitive performance: Baseline results from the ELSA-Brasil Study. Psychoneuroendocrinology 2018; 87:152-158. [PMID: 29096222 DOI: 10.1016/j.psyneuen.2017.10.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 10/18/2017] [Accepted: 10/20/2017] [Indexed: 11/19/2022]
Abstract
BACKGROUND AND AIMS The role of subtle thyroid alterations, such as subclinical thyroid disease and low/high serum thyrotropin (TSH) within the normal range, on cognitive decline is controversial. The aim of this study was to evaluate the association of serum TSH and subclinical thyroid dysfunction with performance on cognitive tests in a large sample of Brazilian middle-aged adults without overt thyroid disease. METHODS In this cross-sectional analysis of the Brazilian Longitudinal Study of Adult Health, we excluded individuals aged 65 years and older, with overt thyroid dysfunction, prevalent stroke, in use of medications that affect thyroid function or that indicate neurologic diseases, and from Asian or indigenous ethnicity. Thyroid status was assessed by serum TSH and free thyroxine (only when the TSH was altered). Individuals were divided according to TSH tertiles and classified according to thyroid function as euthyroidism, subclinical hypothyroidism, or subclinical hyperthyroidism. Cognition was evaluated using delayed word recall test, semantic verbal fluency test, and trail making test version B. The associations of cognitive tests performance with TSH tertiles (using the middle tertile as reference) and thyroid function were investigated using linear regression models, adjusted for an extensive set of possible confounders (sociodemographic characteristics, cardiovascular risk factors, and depression). RESULTS The mean age of the 10,362 participants was 49.5±7.4years, 52.3% women. After adjustment for confounders, the first TSH tertile was associate with worse performance on the trail making test (β=-0.05, 95% CI=-0.09; -0.01, p=0.017). When restricting the analysis to the 9769 individuals with TSH within the normal range, the association between TSH and performance on the trail making test remained significant (β=-0.05, 95% CI=-0.09; -0.01, p=0.020) on multiple linear regression. Subclinical thyroid disease was not associated with performance on cognitive tests. CONCLUSION Low TSH is associated with poorer performance on an executive function test in middle-aged adults without overt thyroid dysfunction.
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Affiliation(s)
- Claudia Szlejf
- Center for clinical and epidemiological research, Hospital Universitario, University of Sao Paulo, Sao Paulo, Brazil; Instituto Nacional de Geriatría, Mexico City, Mexico.
| | - Claudia K Suemoto
- Division of Geriatrics, University of Sao Paulo Medical School, Sao Paulo, Brazil; Department of Global Health and Population, Harvard School of Public Health, Boston, USA
| | - Itamar S Santos
- Center for clinical and epidemiological research, Hospital Universitario, University of Sao Paulo, Sao Paulo, Brazil; Department of Internal Medicine, University of Sao Paulo Medical School, Sao Paulo, Brazil
| | - Paulo A Lotufo
- Center for clinical and epidemiological research, Hospital Universitario, University of Sao Paulo, Sao Paulo, Brazil; Department of Internal Medicine, University of Sao Paulo Medical School, Sao Paulo, Brazil
| | | | | | - Isabela M Benseñor
- Center for clinical and epidemiological research, Hospital Universitario, University of Sao Paulo, Sao Paulo, Brazil; Department of Internal Medicine, University of Sao Paulo Medical School, Sao Paulo, Brazil
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Juárez-Cedillo T, Basurto-Acevedo L, Vega-García S, Sánchez-Rodríguez Martha A, Retana-Ugalde R, Juárez-Cedillo E, Gonzalez-Melendez Roberto C, Escobedo-de-la-Peña J. Prevalence of thyroid dysfunction and its impact on cognition in older mexican adults: (SADEM study). J Endocrinol Invest 2017; 40:945-952. [PMID: 28343318 DOI: 10.1007/s40618-017-0654-6] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 03/07/2017] [Indexed: 12/28/2022]
Abstract
INTRODUCTION Subclinical thyroid dysfunction is a possible risk factor for cognitive impairment in old age, but results are inconsistent. Aim of the present study was to evaluate the prevalence of thyroid dysfunction among older community-dwelling adults and to see whether thyroid function impacts the cognitive status of the elderly. METHODS We included 1750 participants from the Study on Aging and Dementia in Mexico (SADEM). All subjects were evaluated clinically via specific interviews. TSH levels were analyzed by chemiluminescent immunometry assay. We classified participants into five thyroid state groups: (1) normal TSH levels (0.40-4.0 IU/L) were considered euthyroid; (2) Overt hyperthyroidism: TSH <0.3 IU/l and FT4 >23 pmol/l; (3) Overt hypothyroidism: TSH >4.8 IU/l, FT4 <13 pmol/l; (4) Subclinical hyperthyroidism: TSH <0.3 IU/l, FT4: 13-23 pmol/l; (5) Subclinical hypothyroidism: TSH >4.8 IU/l, FT4: 13-23 pmol/l. RESULTS The overall estimated prevalence of thyroid dysfunction in Mexican population was 23.7% (95% CI, 22.66-26.77). Of these, 15.4% older adults were classified as subclinical hypothyroidism, 7.2% overt hypothyroidism, 0.5% subclinical hyperthyroidism, and 0.6% overt hyperthyroidism. The association of thyroid dysfunction with cognitive impairment was most evident in overt hypothyroidism OR = 1.261 (1.185-1.343). CONCLUSIONS The present study demonstrated a high prevalence of thyroid dysfunction in Mexican elderly people living in the community. A relationship between cognitive impairment and the presence of hypothyroidism was also shown, and to a lesser degree in hyperthyroidism.
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Affiliation(s)
- T Juárez-Cedillo
- Unidad de Investigación en Epidemiología Clínica, Hospital General Regional No 1 Carlos McGregor Sánchez Navarro, Gabriel Mancera 222, Colonia Del Valle, Delegación, Benito Juárez, 03100, México, DF, Mexico.
- High Studies (FES) Zaragoza, National Autonomous University of Mexico, Mexico City, Mexico.
| | - L Basurto-Acevedo
- Endocrine Research Unit, National Medical Center, Mexican Institute of Social Security, Mexico City, Mexico
| | - S Vega-García
- Endocrine Research Unit, National Medical Center, Mexican Institute of Social Security, Mexico City, Mexico
| | - A Sánchez-Rodríguez Martha
- Gerontology Research Unit. Faculty of High Studies (FES) Zaragoza, National Autonomous University of Mexico, Mexico City, Mexico
| | - R Retana-Ugalde
- Gerontology Research Unit. Faculty of High Studies (FES) Zaragoza, National Autonomous University of Mexico, Mexico City, Mexico
| | - E Juárez-Cedillo
- Unidad de Investigación en Epidemiología Clínica, Hospital General Regional No 1 Carlos McGregor Sánchez Navarro, Gabriel Mancera 222, Colonia Del Valle, Delegación, Benito Juárez, 03100, México, DF, Mexico
| | | | - J Escobedo-de-la-Peña
- Unidad de Investigación en Epidemiología Clínica, Hospital General Regional No 1 Carlos McGregor Sánchez Navarro, Gabriel Mancera 222, Colonia Del Valle, Delegación, Benito Juárez, 03100, México, DF, Mexico
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60
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Choi HJ, Byun MS, Yi D, Sohn BK, Lee JH, Lee JY, Kim YK, Lee DY. Associations of thyroid hormone serum levels with in-vivo Alzheimer's disease pathologies. ALZHEIMERS RESEARCH & THERAPY 2017; 9:64. [PMID: 28818092 PMCID: PMC5561599 DOI: 10.1186/s13195-017-0291-5] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 07/24/2017] [Indexed: 11/25/2022]
Abstract
Background The present study investigated the relationships between thyroid hormone serum levels or thyroid-stimulating hormone (TSH) and two Alzheimer’s disease (AD)-specific biomarkers, cerebral amyloid beta (Aβ) burden and glucose metabolism, in AD-signature brain regions in cognitively normal (CN) middle-aged and older individuals. Methods This study assessed 148 CN individuals who received comprehensive clinical and neuropsychological assessments that included 11C-Pittsburgh Compound B (PiB)-positron emission tomography (PET) scans, 18F-deoxyglucose (FDG)-PET scans, and the quantification of serum triiodothyronine (T3), free T3, free thyroxine (fT4), and TSH levels. Results All participants were clinically euthyroid. Independent negative associations were found between serum fT4 levels and global cerebral Aβ deposition after controlling for the effects of age, gender, and the apolipoprotein E ε4 (APOEε4) genotype. Although serum TSH levels were not associated with global cerebral Aβ deposition, they had a significant negative association with glucose metabolism in the precuneus/posterior cingulate cortex after controlling for age, gender, and the APOEε4 genotype. No other thyroid hormones exhibited relationships with either brain Aβ burden or glucose metabolism. Conclusions Even in a clinical euthyroid state, low serum fT4 and high serum TSH levels appear to be differentially associated with AD-specific brain changes. Electronic supplementary material The online version of this article (doi:10.1186/s13195-017-0291-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Hyo Jung Choi
- Department of Neuropsychiatry, Seoul National University Boramae Medical Center, Seoul, South Korea
| | - Min Soo Byun
- Institute of Human Behavioral Medicine, Medical Research Center Seoul National University, Seoul, South Korea
| | - Dahyun Yi
- Institute of Human Behavioral Medicine, Medical Research Center Seoul National University, Seoul, South Korea
| | - Bo Kyung Sohn
- Department of Psychiatry, Inje University Sanggye Paik Hospital & Inje University College of Medicine, Seoul, South Korea
| | - Jun Ho Lee
- Department of Neuropsychiatry, Seoul National University Hospital, Seoul, South Korea
| | - Jun-Young Lee
- Department of Neuropsychiatry, Seoul National University Boramae Medical Center, Seoul, South Korea.,Department of Psychiatry, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul, 110-744, South Korea
| | - Yu Kyung Kim
- Department of Nuclear Medicine, Seoul National University Boramae Medical Center, Seoul, South Korea
| | - Dong Young Lee
- Department of Neuropsychiatry, Seoul National University Hospital, Seoul, South Korea. .,Department of Psychiatry, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul, 110-744, South Korea.
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Ma H, Yang F, Butler MR, Belcher J, Redmond TM, Placzek AT, Scanlan TS, Ding XQ. Inhibition of thyroid hormone receptor locally in the retina is a therapeutic strategy for retinal degeneration. FASEB J 2017; 31:3425-3438. [PMID: 28428265 PMCID: PMC5503703 DOI: 10.1096/fj.201601166rr] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 04/11/2017] [Indexed: 12/22/2022]
Abstract
Thyroid hormone (TH) signaling regulates cell proliferation, differentiation, and metabolism. Recent studies have implicated TH signaling in cone photoreceptor viability. Using mouse models of retinal degeneration, we demonstrated that antithyroid drug treatment and targeting iodothyronine deiodinases (DIOs) to suppress cellular tri-iodothyronine (T3) production or increase T3 degradation preserves cones. In this work, we investigated the effectiveness of inhibition of the TH receptor (TR). Two genes, THRA and THRB, encode TRs; THRB2 has been associated with cone viability. Using TR antagonists and Thrb2 deletion, we examined the effects of TR inhibition. Systemic and ocular treatment with the TR antagonists NH-3 and 1-850 increased cone density by 30-40% in the Rpe65-/- mouse model of Leber congenital amaurosis and reduced the number of TUNEL+ cells. Cone survival was significantly improved in Rpe65-/- and Cpfl1 (a model of achromatopsia with Pde6c defect) mice with Thrb2 deletion. Ventral cone density in Cpfl1/Thrb2-/- and Rpe65-/- /Thrb2-/- mice was increased by 1- to 4-fold, compared with age-matched controls. Moreover, the expression levels of TR were significantly higher in the cone-degeneration retinas, suggesting locally elevated TR signaling. This work shows that the effects of antithyroid treatment or targeting DIOs were likely mediated by TRs and that suppressing TR protects cones. Our findings support the view that inhibition of TR locally in the retina is a therapeutic strategy for retinal degeneration management.-Ma, H., Yang, F., Butler, M. R., Belcher, J., Redmond, T. M., Placzek, A. T., Scanlan, T. S., Ding, X.-Q. Inhibition of thyroid hormone receptor locally in the retina is a therapeutic strategy for retinal degeneration.
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Affiliation(s)
- Hongwei Ma
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Fan Yang
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Michael R Butler
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Joshua Belcher
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - T Michael Redmond
- Laboratory of Retinal Cell and Molecular Biology, National Eye Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Andrew T Placzek
- Department of Physiology and Pharmacology, Oregon Health and Science University, Portland, Oregon, USA
| | - Thomas S Scanlan
- Department of Physiology and Pharmacology, Oregon Health and Science University, Portland, Oregon, USA
| | - Xi-Qin Ding
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA;
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Chiaravalloti A, Ursini F, Fiorentini A, Barbagallo G, Martorana A, Koch G, Tavolozza M, Schillaci O. Functional correlates of TSH, fT3 and fT4 in Alzheimer disease: a F-18 FDG PET/CT study. Sci Rep 2017; 7:6220. [PMID: 28740088 PMCID: PMC5524843 DOI: 10.1038/s41598-017-06138-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 06/08/2017] [Indexed: 11/24/2022] Open
Abstract
The present study was aimed to investigate the relationships between thyroid stimulating hormone (TSH), freeT3 (fT3) and freeT4 (fT4) and brain glucose consumption as detectable by means of 2-deoxy-2-(F-18) fluoro-D-glucose (F-18 FDG) Positron Emission Tomography/Computed Tomography (PET/CT) in a selected population with Alzheimer disease (AD). We evaluated 87 subjects (37 males and 50 females, mean age 70 (±6) years old) with AD. All of them were subjected to TSH, fT3 and fT4 assay and to cerebrospinal fluid amyloid (Aβ1-42) and tau [phosphorylated-tau (p-tau) and total-tau (t-tau)] assay prior PET/CT examination. Values for TSH, fT3 and fT4 were in the normal range. The relationships were evaluated by means of statistical parametric mapping (SPM8) using age, sex, MMSE, scholarship and CSF values of amyloid and tau as covariates. We found a significant positive correlation between TSH values and cortical glucose consumption in a wide portion of the anterior cingulate cortex bilaterally (BA32) and left frontal lobe (BA25) (p FWE-corr <0.001; p FDRcorr <0.000; cluster extent 66950). No significant relationships were found between cortical F-18 FDG uptake and T3 and T4 serum levels. The results of our study suggest that a cortical dysfunction in anterior cingulate and frontal lobes may affect serum values of TSH in AD patients.
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Affiliation(s)
- Agostino Chiaravalloti
- Department of Biomedicine and Prevention, University Tor Vergata, Rome, Italy. .,IRCCS Neuromed, Pozzilli (IS), Italy.
| | - Francesco Ursini
- Department of Health Sciences, University Magna Graecia, Catanzaro, Italy
| | | | | | - Alessandro Martorana
- Department of Neurosciences, University Tor Vergata, Rome, Italy.,IRCCS Santa Lucia, Rome, Italy
| | - Giacomo Koch
- Department of Neurosciences, University Tor Vergata, Rome, Italy.,IRCCS Santa Lucia, Rome, Italy
| | - Mario Tavolozza
- Department of Biomedicine and Prevention, University Tor Vergata, Rome, Italy
| | - Orazio Schillaci
- Department of Biomedicine and Prevention, University Tor Vergata, Rome, Italy.,IRCCS Neuromed, Pozzilli (IS), Italy
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Noda M. Thyroid Hormone in the CNS: Contribution of Neuron-Glia Interaction. VITAMINS AND HORMONES 2017; 106:313-331. [PMID: 29407440 DOI: 10.1016/bs.vh.2017.05.005] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The endocrine system and the central nervous system (CNS) are intimately linked. Among hormones closely related to the nervous system, thyroid hormones (THs) are critical for the regulation of development and differentiation of neurons and neuroglia and hence for development and function of the CNS. T3 (3,3',5-triiodothyronine), an active form of TH, is important not only for neuronal development but also for differentiation of astrocytes and oligodendrocytes, and for microglial development. In adult brain, T3 affects glial morphology with sex- and age-dependent manner and therefore may affect their function, leading to influence on neuron-glia interaction. T3 is an important signaling factor that affects microglial functions such as migration and phagocytosis via complex mechanisms. Therefore, dysfunction of THs may impair glial function as well as neuronal function and thus disturb the brain, which may cause mental disorders. Investigations on molecular and cellular basis of hyperthyroidism and hypothyroidism will help us to understand changes in neuron-glia interaction and therefore consequent psychiatric symptoms.
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Affiliation(s)
- Mami Noda
- Laboratory of Pathophysiology, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, Japan.
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O’Connell ME, Tuokko H, Voll S, Simard M, Griffith LE, Taler V, Wolfson C, Kirkland S, Raina P. An evidence-based approach to the creation of normative data: base rates of impaired scores within a brief neuropsychological battery argue for age corrections, but against corrections for medical conditions. Clin Neuropsychol 2017; 31:1188-1203. [DOI: 10.1080/13854046.2017.1349931] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
| | - Holly Tuokko
- Institute on Aging & Lifelong Health, University of Victoria, Victoria, Canada
| | - Stacey Voll
- Institute on Aging & Lifelong Health, University of Victoria, Victoria, Canada
| | - Martine Simard
- School of Psychology, Laval University and Centre de recherche de l’Institut universitaire en santé mentale de Québec, Québec City, Canada
| | - Lauren E. Griffith
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Canada
| | - Vanessa Taler
- School of Psychology, University of Ottawa & Bruyère Research Institute, Ottawa, Canada
| | - Christina Wolfson
- Department of Epidemiology and Biostatistics and Occupational Health, McGill University, Montreal, Canada
| | - Susan Kirkland
- Department of Community Health and Epidemiology, Dalhousie University, Halifax, Canada
| | - Parminder Raina
- Faculty of Health Sciences, Department of Health Research Methods, Evidence and Impact, McMaster Institute for Research on Aging & Labarge Centre for Mobility in Aging, McMaster University, Hamilton, Canada
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65
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Downey CL, Young A, Burton EF, Graham SM, Macfarlane RJ, Tsapakis EM, Tsiridis E. Dementia and osteoporosis in a geriatric population: Is there a common link? World J Orthop 2017; 8:412-423. [PMID: 28567345 PMCID: PMC5434348 DOI: 10.5312/wjo.v8.i5.412] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Revised: 01/28/2017] [Accepted: 03/02/2017] [Indexed: 02/06/2023] Open
Abstract
AIM To determine the existence of a common pathological link between dementia and osteoporosis through reviewing the current evidence base.
METHODS This paper reviews the current literature on osteoporosis and dementia in order to ascertain evidence of a common predisposing aetiology. A literature search of Ovid MED-LINE (1950 to June 2016) was conducted. The keywords “osteoporosis”, “osteoporotic fracture”, “dementia” and “Alzheimer’s disease” (AD) were used to determine the theoretical links with the most significant evidence base behind them. The key links were found to be vitamins D and K, calcium, thyroid disease, statins, alcohol and sex steroids. These subjects were then searched in combination with the previous terms and the resulting papers manually examined. Theoretical, in vitro and in vivo research were all used to inform this review which focuses on the most well developed theoretical common causes for dementia (predominantly Alzheimer’s type) and osteoporosis.
RESULTS Dementia and osteoporosis are multifaceted disease processes with similar epidemiology and a marked increase in prevalence in elderly populations. The existence of a common link between the two has been suggested despite a lack of clear pathological overlap in our current understanding. Research to date has tended to be fragmented and relatively weak in nature with multiple confounding factors reflecting the difficulties of in vivo experimentation in the population of interest. Despite exploration of various possible mechanisms in search for a link between the two pathologies, this paper found that it is possible that these associations are coincidental due to the nature of the evidence available. One finding in this review is that prior investigation into common aetiologies has found raised amyloid beta peptide levels in osteoporotic bone tissue, with a hypothesis that amyloid beta disorders are systemic disorders resulting in differing tissue manifestations. However, our findings were that the most compelling evidence of a common yet independent aetiology lies in the APOE4 allele, which is a well-established risk for AD but also carries an independent association with fracture risk. The mechanism behind this is thought to be the reduced plasma vitamin K levels in individuals exhibiting the APOE4 allele which may be amplified by the nutritional deficiencies associated with dementia, which are known to include vitamins K and D. The vitamin theory postulates that malnutrition and reduced exposure to sunlight in patients with AD leads to vitamin deficiencies.
CONCLUSION Robust evidence remains to be produced regarding potential links and regarding the exact aetiology of these diseases and remains relevant given the burden of dementia and osteoporosis in our ageing population. Future research into amyloid beta, APOE4 and vitamins K and D as the most promising aetiological links should be welcomed.
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66
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Rieben C, Segna D, da Costa BR, Collet TH, Chaker L, Aubert CE, Baumgartner C, Almeida OP, Hogervorst E, Trompet S, Masaki K, Mooijaart SP, Gussekloo J, Peeters RP, Bauer DC, Aujesky D, Rodondi N. Subclinical Thyroid Dysfunction and the Risk of Cognitive Decline: a Meta-Analysis of Prospective Cohort Studies. J Clin Endocrinol Metab 2016; 101:4945-4954. [PMID: 27689250 PMCID: PMC6287525 DOI: 10.1210/jc.2016-2129] [Citation(s) in RCA: 104] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
CONTEXT Although both overt hyper- and hypothyroidism are known to lead to cognitive impairment, data on the association between subclinical thyroid dysfunction and cognitive function are conflicting. OBJECTIVE This study sought to determine the risk of dementia and cognitive decline associated with subclinical thyroid dysfunction among prospective cohorts. DATA SOURCES We searched in MEDLINE and EMBASE from inception until November 2014. STUDY SELECTION Two physicians identified prospective cohorts that assessed thyroid function and cognitive outcomes (dementia; Mini-Mental State Examination [MMSE]). DATA EXTRACTION Data were extracted by one reviewer following standardized protocols and verified by a second reviewer. The primary outcome was dementia and decline in cognitive function was the secondary outcome. DATA SYNTHESIS Eleven prospective cohorts followed 16,805 participants during a median followup of 44.4 months. Five studies analyzed the risk of dementia in subclinical hyperthyroidism (SHyper) (n = 6410), six in subclinical hypothyroidism (SHypo) (n = 7401). Five studies analyzed MMSE decline in SHyper (n = 7895), seven in SHypo (n = 8960). In random-effects models, the pooled adjusted risk ratio for dementia in SHyper was 1.67 (95% confidence interval, 1.04; 2.69) and 1.14 (95% confidence interval, 0.84; 1.55) in SHypo vs euthyroidism, both without evidence of significant heterogeneity (I2 = 0.0%). The pooled mean MMSE decline from baseline to followup (mean 32 mo) did not significantly differ between SHyper or SHypo vs euthyroidism. CONCLUSIONS SHyper might be associated with an elevated risk for dementia, whereas SHypo is not, and both conditions are not associated with faster decline in MMSE over time. Available data are limited, and additional large, high-quality studies are needed.
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Affiliation(s)
- Carole Rieben
- Department of General Internal Medicine (C.R., D.S., C.E.A., C.B., D.A., N.R.), Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland; Institute of Primary Health Care (BIHAM), Faculty of Medicine (B.R.d.C., N.R.), University of Bern, 3012 Bern, Switzerland; Service of Endocrinology, Diabetes and Metabolism (T.-H.C.), University Hospital of Lausanne, 1011 Lausanne, Switzerland; University of Cambridge Metabolic Research Laboratories (T.-H.C.), Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge CB2 0QQ, United Kingdom; Department of Epidemiology (L.C., R.P.P.), Rotterdam Thyroid Center, 3015 GE Rotterdam, The Netherlands; School of Psychiatry and Clinical Neurosciences (O.P.A.), University of Western Australia, Perth 6009, Australia; School of Sport, Exercise and Health Sciences (E.H.), Loughborough University, Loughborough LE11 3TU, United Kingdom; Department of Cardiology (S.T.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; Kuakini Medical Center and the Department of Geriatric Medicine (K.M.), John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii 96817; Department of Gerontology and Geriatrics (S.P.M.), Leiden University Medical Center, Leiden and Institute for Evidence-based Medicine in Old Age (IEMO), 2333 ZA Leiden, The Netherlands; Department of Public Health and Primary Care (J.G.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; and Department of Medicine (D.C.B.), University of California-San Francisco, San Francisco California 94143
| | - Daniel Segna
- Department of General Internal Medicine (C.R., D.S., C.E.A., C.B., D.A., N.R.), Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland; Institute of Primary Health Care (BIHAM), Faculty of Medicine (B.R.d.C., N.R.), University of Bern, 3012 Bern, Switzerland; Service of Endocrinology, Diabetes and Metabolism (T.-H.C.), University Hospital of Lausanne, 1011 Lausanne, Switzerland; University of Cambridge Metabolic Research Laboratories (T.-H.C.), Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge CB2 0QQ, United Kingdom; Department of Epidemiology (L.C., R.P.P.), Rotterdam Thyroid Center, 3015 GE Rotterdam, The Netherlands; School of Psychiatry and Clinical Neurosciences (O.P.A.), University of Western Australia, Perth 6009, Australia; School of Sport, Exercise and Health Sciences (E.H.), Loughborough University, Loughborough LE11 3TU, United Kingdom; Department of Cardiology (S.T.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; Kuakini Medical Center and the Department of Geriatric Medicine (K.M.), John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii 96817; Department of Gerontology and Geriatrics (S.P.M.), Leiden University Medical Center, Leiden and Institute for Evidence-based Medicine in Old Age (IEMO), 2333 ZA Leiden, The Netherlands; Department of Public Health and Primary Care (J.G.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; and Department of Medicine (D.C.B.), University of California-San Francisco, San Francisco California 94143
| | - Bruno R da Costa
- Department of General Internal Medicine (C.R., D.S., C.E.A., C.B., D.A., N.R.), Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland; Institute of Primary Health Care (BIHAM), Faculty of Medicine (B.R.d.C., N.R.), University of Bern, 3012 Bern, Switzerland; Service of Endocrinology, Diabetes and Metabolism (T.-H.C.), University Hospital of Lausanne, 1011 Lausanne, Switzerland; University of Cambridge Metabolic Research Laboratories (T.-H.C.), Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge CB2 0QQ, United Kingdom; Department of Epidemiology (L.C., R.P.P.), Rotterdam Thyroid Center, 3015 GE Rotterdam, The Netherlands; School of Psychiatry and Clinical Neurosciences (O.P.A.), University of Western Australia, Perth 6009, Australia; School of Sport, Exercise and Health Sciences (E.H.), Loughborough University, Loughborough LE11 3TU, United Kingdom; Department of Cardiology (S.T.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; Kuakini Medical Center and the Department of Geriatric Medicine (K.M.), John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii 96817; Department of Gerontology and Geriatrics (S.P.M.), Leiden University Medical Center, Leiden and Institute for Evidence-based Medicine in Old Age (IEMO), 2333 ZA Leiden, The Netherlands; Department of Public Health and Primary Care (J.G.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; and Department of Medicine (D.C.B.), University of California-San Francisco, San Francisco California 94143
| | - Tinh-Hai Collet
- Department of General Internal Medicine (C.R., D.S., C.E.A., C.B., D.A., N.R.), Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland; Institute of Primary Health Care (BIHAM), Faculty of Medicine (B.R.d.C., N.R.), University of Bern, 3012 Bern, Switzerland; Service of Endocrinology, Diabetes and Metabolism (T.-H.C.), University Hospital of Lausanne, 1011 Lausanne, Switzerland; University of Cambridge Metabolic Research Laboratories (T.-H.C.), Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge CB2 0QQ, United Kingdom; Department of Epidemiology (L.C., R.P.P.), Rotterdam Thyroid Center, 3015 GE Rotterdam, The Netherlands; School of Psychiatry and Clinical Neurosciences (O.P.A.), University of Western Australia, Perth 6009, Australia; School of Sport, Exercise and Health Sciences (E.H.), Loughborough University, Loughborough LE11 3TU, United Kingdom; Department of Cardiology (S.T.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; Kuakini Medical Center and the Department of Geriatric Medicine (K.M.), John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii 96817; Department of Gerontology and Geriatrics (S.P.M.), Leiden University Medical Center, Leiden and Institute for Evidence-based Medicine in Old Age (IEMO), 2333 ZA Leiden, The Netherlands; Department of Public Health and Primary Care (J.G.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; and Department of Medicine (D.C.B.), University of California-San Francisco, San Francisco California 94143
| | - Layal Chaker
- Department of General Internal Medicine (C.R., D.S., C.E.A., C.B., D.A., N.R.), Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland; Institute of Primary Health Care (BIHAM), Faculty of Medicine (B.R.d.C., N.R.), University of Bern, 3012 Bern, Switzerland; Service of Endocrinology, Diabetes and Metabolism (T.-H.C.), University Hospital of Lausanne, 1011 Lausanne, Switzerland; University of Cambridge Metabolic Research Laboratories (T.-H.C.), Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge CB2 0QQ, United Kingdom; Department of Epidemiology (L.C., R.P.P.), Rotterdam Thyroid Center, 3015 GE Rotterdam, The Netherlands; School of Psychiatry and Clinical Neurosciences (O.P.A.), University of Western Australia, Perth 6009, Australia; School of Sport, Exercise and Health Sciences (E.H.), Loughborough University, Loughborough LE11 3TU, United Kingdom; Department of Cardiology (S.T.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; Kuakini Medical Center and the Department of Geriatric Medicine (K.M.), John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii 96817; Department of Gerontology and Geriatrics (S.P.M.), Leiden University Medical Center, Leiden and Institute for Evidence-based Medicine in Old Age (IEMO), 2333 ZA Leiden, The Netherlands; Department of Public Health and Primary Care (J.G.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; and Department of Medicine (D.C.B.), University of California-San Francisco, San Francisco California 94143
| | - Carole E Aubert
- Department of General Internal Medicine (C.R., D.S., C.E.A., C.B., D.A., N.R.), Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland; Institute of Primary Health Care (BIHAM), Faculty of Medicine (B.R.d.C., N.R.), University of Bern, 3012 Bern, Switzerland; Service of Endocrinology, Diabetes and Metabolism (T.-H.C.), University Hospital of Lausanne, 1011 Lausanne, Switzerland; University of Cambridge Metabolic Research Laboratories (T.-H.C.), Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge CB2 0QQ, United Kingdom; Department of Epidemiology (L.C., R.P.P.), Rotterdam Thyroid Center, 3015 GE Rotterdam, The Netherlands; School of Psychiatry and Clinical Neurosciences (O.P.A.), University of Western Australia, Perth 6009, Australia; School of Sport, Exercise and Health Sciences (E.H.), Loughborough University, Loughborough LE11 3TU, United Kingdom; Department of Cardiology (S.T.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; Kuakini Medical Center and the Department of Geriatric Medicine (K.M.), John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii 96817; Department of Gerontology and Geriatrics (S.P.M.), Leiden University Medical Center, Leiden and Institute for Evidence-based Medicine in Old Age (IEMO), 2333 ZA Leiden, The Netherlands; Department of Public Health and Primary Care (J.G.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; and Department of Medicine (D.C.B.), University of California-San Francisco, San Francisco California 94143
| | - Christine Baumgartner
- Department of General Internal Medicine (C.R., D.S., C.E.A., C.B., D.A., N.R.), Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland; Institute of Primary Health Care (BIHAM), Faculty of Medicine (B.R.d.C., N.R.), University of Bern, 3012 Bern, Switzerland; Service of Endocrinology, Diabetes and Metabolism (T.-H.C.), University Hospital of Lausanne, 1011 Lausanne, Switzerland; University of Cambridge Metabolic Research Laboratories (T.-H.C.), Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge CB2 0QQ, United Kingdom; Department of Epidemiology (L.C., R.P.P.), Rotterdam Thyroid Center, 3015 GE Rotterdam, The Netherlands; School of Psychiatry and Clinical Neurosciences (O.P.A.), University of Western Australia, Perth 6009, Australia; School of Sport, Exercise and Health Sciences (E.H.), Loughborough University, Loughborough LE11 3TU, United Kingdom; Department of Cardiology (S.T.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; Kuakini Medical Center and the Department of Geriatric Medicine (K.M.), John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii 96817; Department of Gerontology and Geriatrics (S.P.M.), Leiden University Medical Center, Leiden and Institute for Evidence-based Medicine in Old Age (IEMO), 2333 ZA Leiden, The Netherlands; Department of Public Health and Primary Care (J.G.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; and Department of Medicine (D.C.B.), University of California-San Francisco, San Francisco California 94143
| | - Osvaldo P Almeida
- Department of General Internal Medicine (C.R., D.S., C.E.A., C.B., D.A., N.R.), Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland; Institute of Primary Health Care (BIHAM), Faculty of Medicine (B.R.d.C., N.R.), University of Bern, 3012 Bern, Switzerland; Service of Endocrinology, Diabetes and Metabolism (T.-H.C.), University Hospital of Lausanne, 1011 Lausanne, Switzerland; University of Cambridge Metabolic Research Laboratories (T.-H.C.), Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge CB2 0QQ, United Kingdom; Department of Epidemiology (L.C., R.P.P.), Rotterdam Thyroid Center, 3015 GE Rotterdam, The Netherlands; School of Psychiatry and Clinical Neurosciences (O.P.A.), University of Western Australia, Perth 6009, Australia; School of Sport, Exercise and Health Sciences (E.H.), Loughborough University, Loughborough LE11 3TU, United Kingdom; Department of Cardiology (S.T.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; Kuakini Medical Center and the Department of Geriatric Medicine (K.M.), John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii 96817; Department of Gerontology and Geriatrics (S.P.M.), Leiden University Medical Center, Leiden and Institute for Evidence-based Medicine in Old Age (IEMO), 2333 ZA Leiden, The Netherlands; Department of Public Health and Primary Care (J.G.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; and Department of Medicine (D.C.B.), University of California-San Francisco, San Francisco California 94143
| | - Eef Hogervorst
- Department of General Internal Medicine (C.R., D.S., C.E.A., C.B., D.A., N.R.), Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland; Institute of Primary Health Care (BIHAM), Faculty of Medicine (B.R.d.C., N.R.), University of Bern, 3012 Bern, Switzerland; Service of Endocrinology, Diabetes and Metabolism (T.-H.C.), University Hospital of Lausanne, 1011 Lausanne, Switzerland; University of Cambridge Metabolic Research Laboratories (T.-H.C.), Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge CB2 0QQ, United Kingdom; Department of Epidemiology (L.C., R.P.P.), Rotterdam Thyroid Center, 3015 GE Rotterdam, The Netherlands; School of Psychiatry and Clinical Neurosciences (O.P.A.), University of Western Australia, Perth 6009, Australia; School of Sport, Exercise and Health Sciences (E.H.), Loughborough University, Loughborough LE11 3TU, United Kingdom; Department of Cardiology (S.T.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; Kuakini Medical Center and the Department of Geriatric Medicine (K.M.), John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii 96817; Department of Gerontology and Geriatrics (S.P.M.), Leiden University Medical Center, Leiden and Institute for Evidence-based Medicine in Old Age (IEMO), 2333 ZA Leiden, The Netherlands; Department of Public Health and Primary Care (J.G.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; and Department of Medicine (D.C.B.), University of California-San Francisco, San Francisco California 94143
| | - Stella Trompet
- Department of General Internal Medicine (C.R., D.S., C.E.A., C.B., D.A., N.R.), Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland; Institute of Primary Health Care (BIHAM), Faculty of Medicine (B.R.d.C., N.R.), University of Bern, 3012 Bern, Switzerland; Service of Endocrinology, Diabetes and Metabolism (T.-H.C.), University Hospital of Lausanne, 1011 Lausanne, Switzerland; University of Cambridge Metabolic Research Laboratories (T.-H.C.), Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge CB2 0QQ, United Kingdom; Department of Epidemiology (L.C., R.P.P.), Rotterdam Thyroid Center, 3015 GE Rotterdam, The Netherlands; School of Psychiatry and Clinical Neurosciences (O.P.A.), University of Western Australia, Perth 6009, Australia; School of Sport, Exercise and Health Sciences (E.H.), Loughborough University, Loughborough LE11 3TU, United Kingdom; Department of Cardiology (S.T.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; Kuakini Medical Center and the Department of Geriatric Medicine (K.M.), John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii 96817; Department of Gerontology and Geriatrics (S.P.M.), Leiden University Medical Center, Leiden and Institute for Evidence-based Medicine in Old Age (IEMO), 2333 ZA Leiden, The Netherlands; Department of Public Health and Primary Care (J.G.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; and Department of Medicine (D.C.B.), University of California-San Francisco, San Francisco California 94143
| | - Kamal Masaki
- Department of General Internal Medicine (C.R., D.S., C.E.A., C.B., D.A., N.R.), Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland; Institute of Primary Health Care (BIHAM), Faculty of Medicine (B.R.d.C., N.R.), University of Bern, 3012 Bern, Switzerland; Service of Endocrinology, Diabetes and Metabolism (T.-H.C.), University Hospital of Lausanne, 1011 Lausanne, Switzerland; University of Cambridge Metabolic Research Laboratories (T.-H.C.), Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge CB2 0QQ, United Kingdom; Department of Epidemiology (L.C., R.P.P.), Rotterdam Thyroid Center, 3015 GE Rotterdam, The Netherlands; School of Psychiatry and Clinical Neurosciences (O.P.A.), University of Western Australia, Perth 6009, Australia; School of Sport, Exercise and Health Sciences (E.H.), Loughborough University, Loughborough LE11 3TU, United Kingdom; Department of Cardiology (S.T.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; Kuakini Medical Center and the Department of Geriatric Medicine (K.M.), John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii 96817; Department of Gerontology and Geriatrics (S.P.M.), Leiden University Medical Center, Leiden and Institute for Evidence-based Medicine in Old Age (IEMO), 2333 ZA Leiden, The Netherlands; Department of Public Health and Primary Care (J.G.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; and Department of Medicine (D.C.B.), University of California-San Francisco, San Francisco California 94143
| | - Simon P Mooijaart
- Department of General Internal Medicine (C.R., D.S., C.E.A., C.B., D.A., N.R.), Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland; Institute of Primary Health Care (BIHAM), Faculty of Medicine (B.R.d.C., N.R.), University of Bern, 3012 Bern, Switzerland; Service of Endocrinology, Diabetes and Metabolism (T.-H.C.), University Hospital of Lausanne, 1011 Lausanne, Switzerland; University of Cambridge Metabolic Research Laboratories (T.-H.C.), Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge CB2 0QQ, United Kingdom; Department of Epidemiology (L.C., R.P.P.), Rotterdam Thyroid Center, 3015 GE Rotterdam, The Netherlands; School of Psychiatry and Clinical Neurosciences (O.P.A.), University of Western Australia, Perth 6009, Australia; School of Sport, Exercise and Health Sciences (E.H.), Loughborough University, Loughborough LE11 3TU, United Kingdom; Department of Cardiology (S.T.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; Kuakini Medical Center and the Department of Geriatric Medicine (K.M.), John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii 96817; Department of Gerontology and Geriatrics (S.P.M.), Leiden University Medical Center, Leiden and Institute for Evidence-based Medicine in Old Age (IEMO), 2333 ZA Leiden, The Netherlands; Department of Public Health and Primary Care (J.G.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; and Department of Medicine (D.C.B.), University of California-San Francisco, San Francisco California 94143
| | - Jacobijn Gussekloo
- Department of General Internal Medicine (C.R., D.S., C.E.A., C.B., D.A., N.R.), Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland; Institute of Primary Health Care (BIHAM), Faculty of Medicine (B.R.d.C., N.R.), University of Bern, 3012 Bern, Switzerland; Service of Endocrinology, Diabetes and Metabolism (T.-H.C.), University Hospital of Lausanne, 1011 Lausanne, Switzerland; University of Cambridge Metabolic Research Laboratories (T.-H.C.), Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge CB2 0QQ, United Kingdom; Department of Epidemiology (L.C., R.P.P.), Rotterdam Thyroid Center, 3015 GE Rotterdam, The Netherlands; School of Psychiatry and Clinical Neurosciences (O.P.A.), University of Western Australia, Perth 6009, Australia; School of Sport, Exercise and Health Sciences (E.H.), Loughborough University, Loughborough LE11 3TU, United Kingdom; Department of Cardiology (S.T.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; Kuakini Medical Center and the Department of Geriatric Medicine (K.M.), John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii 96817; Department of Gerontology and Geriatrics (S.P.M.), Leiden University Medical Center, Leiden and Institute for Evidence-based Medicine in Old Age (IEMO), 2333 ZA Leiden, The Netherlands; Department of Public Health and Primary Care (J.G.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; and Department of Medicine (D.C.B.), University of California-San Francisco, San Francisco California 94143
| | - Robin P Peeters
- Department of General Internal Medicine (C.R., D.S., C.E.A., C.B., D.A., N.R.), Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland; Institute of Primary Health Care (BIHAM), Faculty of Medicine (B.R.d.C., N.R.), University of Bern, 3012 Bern, Switzerland; Service of Endocrinology, Diabetes and Metabolism (T.-H.C.), University Hospital of Lausanne, 1011 Lausanne, Switzerland; University of Cambridge Metabolic Research Laboratories (T.-H.C.), Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge CB2 0QQ, United Kingdom; Department of Epidemiology (L.C., R.P.P.), Rotterdam Thyroid Center, 3015 GE Rotterdam, The Netherlands; School of Psychiatry and Clinical Neurosciences (O.P.A.), University of Western Australia, Perth 6009, Australia; School of Sport, Exercise and Health Sciences (E.H.), Loughborough University, Loughborough LE11 3TU, United Kingdom; Department of Cardiology (S.T.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; Kuakini Medical Center and the Department of Geriatric Medicine (K.M.), John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii 96817; Department of Gerontology and Geriatrics (S.P.M.), Leiden University Medical Center, Leiden and Institute for Evidence-based Medicine in Old Age (IEMO), 2333 ZA Leiden, The Netherlands; Department of Public Health and Primary Care (J.G.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; and Department of Medicine (D.C.B.), University of California-San Francisco, San Francisco California 94143
| | - Douglas C Bauer
- Department of General Internal Medicine (C.R., D.S., C.E.A., C.B., D.A., N.R.), Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland; Institute of Primary Health Care (BIHAM), Faculty of Medicine (B.R.d.C., N.R.), University of Bern, 3012 Bern, Switzerland; Service of Endocrinology, Diabetes and Metabolism (T.-H.C.), University Hospital of Lausanne, 1011 Lausanne, Switzerland; University of Cambridge Metabolic Research Laboratories (T.-H.C.), Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge CB2 0QQ, United Kingdom; Department of Epidemiology (L.C., R.P.P.), Rotterdam Thyroid Center, 3015 GE Rotterdam, The Netherlands; School of Psychiatry and Clinical Neurosciences (O.P.A.), University of Western Australia, Perth 6009, Australia; School of Sport, Exercise and Health Sciences (E.H.), Loughborough University, Loughborough LE11 3TU, United Kingdom; Department of Cardiology (S.T.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; Kuakini Medical Center and the Department of Geriatric Medicine (K.M.), John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii 96817; Department of Gerontology and Geriatrics (S.P.M.), Leiden University Medical Center, Leiden and Institute for Evidence-based Medicine in Old Age (IEMO), 2333 ZA Leiden, The Netherlands; Department of Public Health and Primary Care (J.G.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; and Department of Medicine (D.C.B.), University of California-San Francisco, San Francisco California 94143
| | - Drahomir Aujesky
- Department of General Internal Medicine (C.R., D.S., C.E.A., C.B., D.A., N.R.), Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland; Institute of Primary Health Care (BIHAM), Faculty of Medicine (B.R.d.C., N.R.), University of Bern, 3012 Bern, Switzerland; Service of Endocrinology, Diabetes and Metabolism (T.-H.C.), University Hospital of Lausanne, 1011 Lausanne, Switzerland; University of Cambridge Metabolic Research Laboratories (T.-H.C.), Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge CB2 0QQ, United Kingdom; Department of Epidemiology (L.C., R.P.P.), Rotterdam Thyroid Center, 3015 GE Rotterdam, The Netherlands; School of Psychiatry and Clinical Neurosciences (O.P.A.), University of Western Australia, Perth 6009, Australia; School of Sport, Exercise and Health Sciences (E.H.), Loughborough University, Loughborough LE11 3TU, United Kingdom; Department of Cardiology (S.T.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; Kuakini Medical Center and the Department of Geriatric Medicine (K.M.), John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii 96817; Department of Gerontology and Geriatrics (S.P.M.), Leiden University Medical Center, Leiden and Institute for Evidence-based Medicine in Old Age (IEMO), 2333 ZA Leiden, The Netherlands; Department of Public Health and Primary Care (J.G.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; and Department of Medicine (D.C.B.), University of California-San Francisco, San Francisco California 94143
| | - Nicolas Rodondi
- Department of General Internal Medicine (C.R., D.S., C.E.A., C.B., D.A., N.R.), Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland; Institute of Primary Health Care (BIHAM), Faculty of Medicine (B.R.d.C., N.R.), University of Bern, 3012 Bern, Switzerland; Service of Endocrinology, Diabetes and Metabolism (T.-H.C.), University Hospital of Lausanne, 1011 Lausanne, Switzerland; University of Cambridge Metabolic Research Laboratories (T.-H.C.), Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge CB2 0QQ, United Kingdom; Department of Epidemiology (L.C., R.P.P.), Rotterdam Thyroid Center, 3015 GE Rotterdam, The Netherlands; School of Psychiatry and Clinical Neurosciences (O.P.A.), University of Western Australia, Perth 6009, Australia; School of Sport, Exercise and Health Sciences (E.H.), Loughborough University, Loughborough LE11 3TU, United Kingdom; Department of Cardiology (S.T.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; Kuakini Medical Center and the Department of Geriatric Medicine (K.M.), John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii 96817; Department of Gerontology and Geriatrics (S.P.M.), Leiden University Medical Center, Leiden and Institute for Evidence-based Medicine in Old Age (IEMO), 2333 ZA Leiden, The Netherlands; Department of Public Health and Primary Care (J.G.), Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; and Department of Medicine (D.C.B.), University of California-San Francisco, San Francisco California 94143
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67
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Nelson PT, Katsumata Y, Nho K, Artiushin SC, Jicha GA, Wang WX, Abner EL, Saykin AJ, Kukull WA, Fardo DW. Genomics and CSF analyses implicate thyroid hormone in hippocampal sclerosis of aging. Acta Neuropathol 2016; 132:841-858. [PMID: 27815632 DOI: 10.1007/s00401-016-1641-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 10/28/2016] [Accepted: 10/28/2016] [Indexed: 11/29/2022]
Abstract
We report evidence of a novel pathogenetic mechanism in which thyroid hormone dysregulation contributes to dementia in elderly persons. Two single nucleotide polymorphisms (SNPs) on chromosome 12p12 were the initial foci of our study: rs704180 and rs73069071. These SNPs were identified by separate research groups as risk alleles for non-Alzheimer's neurodegeneration. We found that the rs73069071 risk genotype was associated with hippocampal sclerosis (HS) pathology among people with the rs704180 risk genotype (National Alzheimer's Coordinating Center/Alzheimer's Disease Genetic Consortium data; n = 2113, including 241 autopsy-confirmed HS cases). Furthermore, both rs704180 and rs73069071 risk genotypes were associated with widespread brain atrophy visualized by MRI (Alzheimer's Disease Neuroimaging Initiative data; n = 1239). In human brain samples from the Braineac database, both rs704180 and rs73069071 risk genotypes were associated with variation in expression of ABCC9, a gene which encodes a metabolic sensor protein in astrocytes. The rs73069071 risk genotype was also associated with altered expression of a nearby astrocyte-expressed gene, SLCO1C1. Analyses of human brain gene expression databases indicated that the chromosome 12p12 locus may regulate particular astrocyte-expressed genes induced by the active form of thyroid hormone, triiodothyronine (T3). This is informative biologically, because the SLCO1C1 protein transports thyroid hormone into astrocytes from blood. Guided by the genomic data, we tested the hypothesis that altered thyroid hormone levels could be detected in cerebrospinal fluid (CSF) obtained from persons with HS pathology. Total T3 levels in CSF were elevated in HS cases (p < 0.04 in two separately analyzed groups), but not in Alzheimer's disease cases, relative to controls. No change was detected in the serum levels of thyroid hormone (T3 or T4) in a subsample of HS cases prior to death. We conclude that brain thyroid hormone perturbation is a potential pathogenetic factor in HS that may also provide the basis for a novel CSF-based clinical biomarker.
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68
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Pearce SHS, Razvi S, Yadegarfar ME, Martin-Ruiz C, Kingston A, Collerton J, Visser TJ, Kirkwood TB, Jagger C. Serum Thyroid Function, Mortality and Disability in Advanced Old Age: The Newcastle 85+ Study. J Clin Endocrinol Metab 2016; 101:4385-4394. [PMID: 27552542 PMCID: PMC5095241 DOI: 10.1210/jc.2016-1935] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
CONTEXT Perturbations in thyroid function are common in older individuals but their significance in the very old is not fully understood. OBJECTIVE This study sought to determine whether thyroid hormone status and variation of thyroid hormones within the reference range correlated with mortality and disability in a cohort of 85-year-olds. DESIGN A cohort of 85-year-old individuals were assessed in their own homes (community or institutional care) for health status and thyroid function, and followed for mortality and disability for up to 9 years. SETTING AND PARTICIPANTS Six hundred and forty-three 85-year-olds registered with participating general practices in Newcastle and North Tyneside, United Kingdom. MAIN OUTCOMES All-cause mortality, cardiovascular mortality, and disability according to thyroid disease status and baseline thyroid hormone parameters (serum TSH, FT4, FT3, and rT3). Models were adjusted for age, sex, education, body mass index, smoking, and disease count. RESULTS After adjustment for age and sex, all-cause mortality was associated with baseline serum rT3 and FT3 (both P < .001), but not FT4 or TSH. After additional adjustment for potential confounders, only rT3 remained significantly associated with mortality (P = .001). Baseline serum TSH and rT3 predicted future disability trajectories in men and women, respectively. CONCLUSIONS Our study is reassuring that individuals age 85 y with both subclinical hypothyroidism and subclinical hyperthyroidism do not have a significantly worse survival over 9 years than their euthyroid peers. However, thyroid function tests did predict disability, with higher serum TSH levels predicting better outcomes. These data strengthen the argument for routine use of age-specific thyroid function reference ranges.
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Affiliation(s)
- Simon H S Pearce
- Institute of Genetic Medicine (S.H.S.P., S.R.), Newcastle University, Newcastle upon Tyne NE1 3BZ, United Kingdom; Institute of Health and Society (M.E.Y., C.M.-R., A.K., J.C., T.B.K., C.J.), Newcastle University, Newcastle upon Tyne NE2 4AX, United Kingdom; and Department of Internal Medicine (T.J.V.), Erasmus Medical Center, Rotterdam, The Netherlands
| | - Salman Razvi
- Institute of Genetic Medicine (S.H.S.P., S.R.), Newcastle University, Newcastle upon Tyne NE1 3BZ, United Kingdom; Institute of Health and Society (M.E.Y., C.M.-R., A.K., J.C., T.B.K., C.J.), Newcastle University, Newcastle upon Tyne NE2 4AX, United Kingdom; and Department of Internal Medicine (T.J.V.), Erasmus Medical Center, Rotterdam, The Netherlands
| | - Mohammad E Yadegarfar
- Institute of Genetic Medicine (S.H.S.P., S.R.), Newcastle University, Newcastle upon Tyne NE1 3BZ, United Kingdom; Institute of Health and Society (M.E.Y., C.M.-R., A.K., J.C., T.B.K., C.J.), Newcastle University, Newcastle upon Tyne NE2 4AX, United Kingdom; and Department of Internal Medicine (T.J.V.), Erasmus Medical Center, Rotterdam, The Netherlands
| | - Carmen Martin-Ruiz
- Institute of Genetic Medicine (S.H.S.P., S.R.), Newcastle University, Newcastle upon Tyne NE1 3BZ, United Kingdom; Institute of Health and Society (M.E.Y., C.M.-R., A.K., J.C., T.B.K., C.J.), Newcastle University, Newcastle upon Tyne NE2 4AX, United Kingdom; and Department of Internal Medicine (T.J.V.), Erasmus Medical Center, Rotterdam, The Netherlands
| | - Andrew Kingston
- Institute of Genetic Medicine (S.H.S.P., S.R.), Newcastle University, Newcastle upon Tyne NE1 3BZ, United Kingdom; Institute of Health and Society (M.E.Y., C.M.-R., A.K., J.C., T.B.K., C.J.), Newcastle University, Newcastle upon Tyne NE2 4AX, United Kingdom; and Department of Internal Medicine (T.J.V.), Erasmus Medical Center, Rotterdam, The Netherlands
| | - Joanna Collerton
- Institute of Genetic Medicine (S.H.S.P., S.R.), Newcastle University, Newcastle upon Tyne NE1 3BZ, United Kingdom; Institute of Health and Society (M.E.Y., C.M.-R., A.K., J.C., T.B.K., C.J.), Newcastle University, Newcastle upon Tyne NE2 4AX, United Kingdom; and Department of Internal Medicine (T.J.V.), Erasmus Medical Center, Rotterdam, The Netherlands
| | - Theo J Visser
- Institute of Genetic Medicine (S.H.S.P., S.R.), Newcastle University, Newcastle upon Tyne NE1 3BZ, United Kingdom; Institute of Health and Society (M.E.Y., C.M.-R., A.K., J.C., T.B.K., C.J.), Newcastle University, Newcastle upon Tyne NE2 4AX, United Kingdom; and Department of Internal Medicine (T.J.V.), Erasmus Medical Center, Rotterdam, The Netherlands
| | - Tom B Kirkwood
- Institute of Genetic Medicine (S.H.S.P., S.R.), Newcastle University, Newcastle upon Tyne NE1 3BZ, United Kingdom; Institute of Health and Society (M.E.Y., C.M.-R., A.K., J.C., T.B.K., C.J.), Newcastle University, Newcastle upon Tyne NE2 4AX, United Kingdom; and Department of Internal Medicine (T.J.V.), Erasmus Medical Center, Rotterdam, The Netherlands
| | - Carol Jagger
- Institute of Genetic Medicine (S.H.S.P., S.R.), Newcastle University, Newcastle upon Tyne NE1 3BZ, United Kingdom; Institute of Health and Society (M.E.Y., C.M.-R., A.K., J.C., T.B.K., C.J.), Newcastle University, Newcastle upon Tyne NE2 4AX, United Kingdom; and Department of Internal Medicine (T.J.V.), Erasmus Medical Center, Rotterdam, The Netherlands
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69
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Yang F, Ma H, Belcher J, Butler MR, Redmond TM, Boye SL, Hauswirth WW, Ding XQ. Targeting iodothyronine deiodinases locally in the retina is a therapeutic strategy for retinal degeneration. FASEB J 2016; 30:4313-4325. [PMID: 27623928 DOI: 10.1096/fj.201600715r] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Accepted: 09/01/2016] [Indexed: 12/21/2022]
Abstract
Recent studies have implicated thyroid hormone (TH) signaling in cone photoreceptor viability. Using mouse models of retinal degeneration, we found that antithyroid treatment preserves cones. This work investigates the significance of targeting intracellular TH components locally in the retina. The cellular TH level is mainly regulated by deiodinase iodothyronine (DIO)-2 and -3. DIO2 converts thyroxine (T4) to triiodothyronine (T3), which binds to the TH receptor, whereas DIO3 degrades T3 and T4. We examined cone survival after overexpression of DIO3 and inhibition of DIO2 and demonstrated the benefits of these manipulations. Subretinal delivery of AAV5-IRBP/GNAT2-DIO3, which directs expression of human DIO3 specifically in cones, increased cone density by 30-40% in a Rpe65-/- mouse model of Lebers congenital amaurosis (LCA) and in a Cpfl1 mouse with Pde6c defect model of achromatopsia, compared with their respective untreated controls. Intravitreal and topical delivery of the DIO2 inhibitor iopanoic acid also significantly improved cone survival in the LCA model mice. Moreover, the expression levels of DIO2 and Slc16a2 were significantly higher in the diseased retinas, suggesting locally elevated TH signaling. We show that targeting DIOs protects cones, and intracellular inhibition of TH components locally in the retina may represent a novel strategy for retinal degeneration management.-Yang, F., Ma, H., Belcher, J., Butler, M. R., Redmond, T. M., Boye, S. L., Hauswirth, W. W., Ding, X.-Q. Targeting iodothyronine deiodinases locally in the retina is a therapeutic strategy for retinal degeneration.
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Affiliation(s)
- Fan Yang
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Hongwei Ma
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Joshua Belcher
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Michael R Butler
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - T Michael Redmond
- Laboratory of Retinal Cell and Molecular Biology, National Eye Institute, Bethesda, Maryland, USA
| | - Sanford L Boye
- Department of Ophthalmology, University of Florida, Gainesville, Florida, USA; and.,Department of Molecular Genetics and Microbiology, University of Florida, Gainesville, Florida, USA
| | - William W Hauswirth
- Department of Ophthalmology, University of Florida, Gainesville, Florida, USA; and.,Department of Molecular Genetics and Microbiology, University of Florida, Gainesville, Florida, USA
| | - Xi-Qin Ding
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA;
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70
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Wu Y, Pei Y, Wang F, Xu D, Cui W. Higher FT4 or TSH below the normal range are associated with increased risk of dementia: a meta-analysis of 11 studies. Sci Rep 2016; 6:31975. [PMID: 27558885 PMCID: PMC4997309 DOI: 10.1038/srep31975] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Accepted: 07/26/2016] [Indexed: 12/19/2022] Open
Abstract
Observational studies of thyroid function and dementia have reported conflicting results. We reviewed cohort and case-control studies from MEDLINE, EMBASE, Web of Science and the Cochrane Library that focused on the association between serum thyroxine, thyrotropin and dementia. A total of 24,952 participants from three case-control and eight cohort studies were included. The relationships between dementia and the per standard deviation (SD) increment of free thyroxine (FT4) (random relative ratio (RR) = 1.08, 95% confidence interval (CI) 1.00–1.17) and thyroid-stimulating hormone (TSH) (fixed RR = 0.91, 95% CI 0.84–0.99) were well established. TSH levels in the low category were associated with an increased risk of dementia (fixed RR = 1.60, 95% CI 1.27–2.00). However, the positive association was confined to TSH levels below the normal range (fixed RR = 1.77, 95% CI 1.31–2.39), not those in the lower tertile of the normal range (fixed RR = 1.39, 95% CI 0.98–1.97). Additionally, dementia was not significantly associated with high TSH levels (fixed RR = 0.99, 95% CI 0.76–1.29). Furthermore, there was no positive association between dementia and the low or high categories of TSH in men. Thus, individuals with higher FT4 levels or those with TSH levels below the normal range have an increased risk of dementia.
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Affiliation(s)
- Yue Wu
- Department of Clinical Laboratory, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Yuqing Pei
- Department of Clinical Laboratory, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Fei Wang
- Department of Clinical Laboratory, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Danfei Xu
- Department of Clinical Laboratory, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Wei Cui
- Department of Clinical Laboratory, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
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71
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Moon JH. Endocrine Risk Factors for Cognitive Impairment. Endocrinol Metab (Seoul) 2016; 31:185-92. [PMID: 27118278 PMCID: PMC4923401 DOI: 10.3803/enm.2016.31.2.185] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 01/29/2016] [Accepted: 02/05/2016] [Indexed: 12/28/2022] Open
Abstract
Cognitive impairment, including Alzheimer's disease and other kinds of dementia, is a major health problem in older adults worldwide. Although numerous investigators have attempted to develop effective treatment modalities or drugs, there is no reasonably efficacious strategy for preventing or recovering from cognitive impairment. Therefore, modifiable risk factors for cognitive impairment have received attention, and the growing literature of metabolic risk factors for cognitive impairment has expanded from epidemiology to molecular pathogenesis and therapeutic management. This review focuses on the epidemiological evidence for the association between cognitive impairment and several endocrine risk factors, including insulin resistance, dyslipidemia, thyroid dysfunction, vitamin D deficiency, and subclinical atherosclerosis. Researches suggesting possible mechanisms for this association are reviewed. The research investigating modifiable endocrine risk factors for cognitive impairment provides clues for understanding the pathogenesis of cognitive impairment and developing novel treatment modalities. However, so far, interventional studies investigating the beneficial effect of the "modification" of these "modifiable risk factors" on cognitive impairment have reported variable results. Therefore, well-designed, randomized prospective interventional studies are needed.
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Affiliation(s)
- Jae Hoon Moon
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
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72
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Chen Z, Liang X, Zhang C, Wang J, Chen G, Zhang H, Sun Z. Correlation of thyroid dysfunction and cognitive impairments induced by subcortical ischemic vascular disease. Brain Behav 2016; 6:e00452. [PMID: 27127724 PMCID: PMC4840667 DOI: 10.1002/brb3.452] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2015] [Revised: 02/01/2016] [Accepted: 02/05/2016] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND To date, the relationship between thyroid dysfunction and subcortical ischemic vascular disease (SIVD)-induced cognitive impairments still remains elusive. METHODS Cognitive performances were examined in 215 participants, including 54 healthy participants, 52 SIVD patients with no dementia (SIVDND), 55 patients with mild cognitive impairment (SVMCI), and 54 patients with vascular dementia (VD). Serum thyroid-stimulating hormone (TSH), total triiodothyronine (TT3), free triiodothyronine (FT3), total thyroxine (TT4) and free thyroxine (FT4), thyroglobulin antibody (TGA), and antithyroid peroxidase antibody (TPO-Abs) were quantified by radioimmunoassay or ELISA. RESULTS A close correlation between thyroid status and cognitive dysfunction in SIVD was observed. Serum TT3 and FT3 levels decreased, whereas serum TSH level increased, with the decline in cognitive functions. Furthermore, TT3 levels showed a positive correlation, whereas TSH level showed a negative correlation, with the Mini-Mental State Examination (MMSE) scores. Our results suggested that thyroid function was associated with cognitive impairments induced by SIVD. Also, thyroid function and thyroid hormone level could be a risk factor in the development of SIVD. Serum TT3 and TSH levels might also be used as biomarkers for cognitive dysfunction. CONCLUSIONS These findings might contribute to a more accurate clinical diagnosis and differentiation among normal controls, SIVDND, SVMCI, and VD patients, in order to develop appropriate intervention approaches for SIVD therapeutic treatment.
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Affiliation(s)
- Zongsheng Chen
- Department of Neurology The First Affiliated Hospital of Anhui Medical University 218 Jixi Road 230022 Hefei Anhui China; Department of Neurology Tongling No. 4 People Hospital 98 Yangjiashan Road 244000 Tongling Anhui China
| | - Xianfa Liang
- Department of Neurology Tongling No. 4 People Hospital 98 Yangjiashan Road 244000 Tongling Anhui China
| | - Chunxiu Zhang
- Department of Neurology Tongling No. 4 People Hospital 98 Yangjiashan Road 244000 Tongling Anhui China
| | - Jinling Wang
- Department of Neurology Tongling No. 4 People Hospital 98 Yangjiashan Road 244000 Tongling Anhui China
| | - Gaiping Chen
- Department of Neurology Tongling No. 4 People Hospital 98 Yangjiashan Road 244000 Tongling Anhui China
| | - Hong Zhang
- Department of Neurology The First Affiliated Hospital of Anhui Medical University 218 Jixi Road 230022 Hefei Anhui China
| | - Zhongwu Sun
- Department of Neurology The First Affiliated Hospital of Anhui Medical University 218 Jixi Road 230022 Hefei Anhui China
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Hu Y, Wang ZC, Guo QH, Cheng W, Chen YW. Is thyroid status associated with cognitive impairment in elderly patients in China? BMC Endocr Disord 2016; 16:11. [PMID: 26897535 PMCID: PMC4761141 DOI: 10.1186/s12902-016-0092-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Accepted: 02/10/2016] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND The relationship between alterations in thyroid function and cognitive deficits has been investigated in several previous studies. Hypo-or hyperthyroidism and, to a lesser extent, subclinical thyroid dysfunction can negatively affect cognitive performance. However, limited data are available on the potential association of thyroid function with mild cognitive impairment (MCI) and Alzheimer's disease (AD) in the elderly Chinese population. METHODS In the present study focusing on a population of elderly Chinese individuals ≥ 50 years of age, 77 cognitively normal controls, 64 patients with MCI, and 154 patients diagnosed with AD underwent assessment of thyroid status using thyroid stimulating hormone (TSH), free triiodothyronine (fT3) and free thyroxine (fT4) levels as variables. Cognitive function was evaluated with the aid of comprehensive neuropsychological tests, such as the Mini-Mental State Examination (MMSE) and Memory and Executive Screening (MES). RESULTS Overall, 88.1 % of the subjects displayed normal thyroid function, 4.7 % were diagnosed with clinical hypothyroidism, 3.1 % with subclinical hypothyroidism, and 4.1 % with subclinical hyperthyroidism. After adjusting for covariates (age, sex, education years and body mass index), no association was evident between mild cognitive impairment or AD and thyroid dysfunction. However, lower serum TSH was correlated with risk of AD (odds ratio [OR]: 2.78, 95 % confidence interval [95% CI]: 1.11-6.99). CONCLUSION Neither hypothyroidism nor subclinical hyperthyroidism was associated with AD and MCI in this population-based elderly Chinese cohort. Our findings need to be confirmed in a longitudinal study.
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Affiliation(s)
- Yao Hu
- Department of Laboratory Medicine, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, 200040, China.
| | - Zhi-cheng Wang
- Department of Laboratory Medicine, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, 200040, China
| | - Qi-hao Guo
- Department of Neurology and Institute of Neurology, Huashan Hospital, State Key Laboratory of Medical Neurobiology, Shanghai Medical College, Fudan University, Shanghai, 200040, China
| | - Wei Cheng
- Department of Laboratory Medicine, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, 200040, China
| | - Yan-wen Chen
- Department of Laboratory Medicine, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, 200040, China
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74
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Ojala AK, Schalin-Jäntti C, Pitkälä KH, Tilvis RS, Strandberg TE. Serum thyroid-stimulating hormone and cognition in older people. Age Ageing 2016; 45:155-7. [PMID: 26601696 DOI: 10.1093/ageing/afv160] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Accepted: 10/07/2015] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND high TSH concentrations and cognitive decline are both very common among older people and could be linked. OBJECTIVE to assess cognition in our cohort of 335 home-dwelling older people (75 years and older) and to cross-sectionally relate the results to thyroid-stimulating hormone (TSH) concentrations. Our special focus was on the upper normal TSH range and subclinical hypothyroidism. METHODS cognitive performance was evaluated using the Consortium to Establish a Registry for Alzheimer's disease neuropsychological battery (CERAD-nb). The Clinical Dementia Rating (CDR) scale was used to evaluate severity of cognitive disorder. The APOEε4 genotype was also defined. Subjects were divided into quartiles based on the TSH concentrations, and results were compared between these groups. RESULTS expected relations were observed between CERAD domains and both educational level and APOEε4 genotype. Female sex significantly associated with better performance in Boston naming (OR = 0.48; 95% CI = 0.27-0.85). In the whole cohort, higher TSH concentrations tended to associate with better scores in most parts of the CERAD-nb tests, but differences were not statistically significant. However, subjects with the highest TSH concentration (90th TSH percentile, range 4.14-14.4 mU/l) had better CDR scores compared with subjects with the lowest TSH concentration (10th percentile, range 0.001-0.63 mIU/l; OR 0.10; 95% CI 0.014-0.76). CONCLUSIONS our results do not support the notion that higher TSH concentrations, not even in the range of subclinical hypothyroidism, would adversely affect cognition among older people.
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Affiliation(s)
- Anna K Ojala
- Endocrinology, Abdominal Center, Helsinki University and Helsinki University Hospital, Helsinki FI-00290, Finland
| | - Camilla Schalin-Jäntti
- Endocrinology, Abdominal Center, Helsinki University and Helsinki University Hospital, Helsinki FI-00290, Finland
| | - Kaisu H Pitkälä
- Unit of General Practice, Helsinki University Hospital, Helsinki, Finland
| | - Reijo S Tilvis
- Unit of General Practice, Helsinki University Hospital, Helsinki, Finland
| | - Timo E Strandberg
- Department of Medicine, Geriatric Clinic, University of Helsinki and Helsinki University Hospital, Helsinki, Finland Department of Public Health Science and General Practice, University of Oulu, Oulu, Finland
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Djukic M, Wedekind D, Franz A, Gremke M, Nau R. Frequency of dementia syndromes with a potentially treatable cause in geriatric in-patients: analysis of a 1-year interval. Eur Arch Psychiatry Clin Neurosci 2015; 265:429-38. [PMID: 25716929 DOI: 10.1007/s00406-015-0583-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Accepted: 02/08/2015] [Indexed: 01/10/2023]
Abstract
In addition to neurodegenerative and vascular causes of dementia, in the differential diagnosis potentially reversible conditions of dementia also must be assessed. Routine laboratory parameters and neuroimaging, which are recommended for the differential diagnosis of suspected dementia by the German S3 Guideline "Dementia", were retrospectively studied in 166 geriatric patients with suspected dementia. Delirium was diagnosed in six patients (3.6%). These six patients were excluded from the study. Of the 160 remaining patients, there were 99 (59.6%) with an already known dementia. In this subgroup of patients, we found a potentially treatable cause of dementia in 18.2%. In the remaining 61 patients (36.8%), the newly diagnosed dementia syndrome was established according to ICD-10 criteria. Potentially reversible causes of the dementia syndrome were found in 19 of these patients (31.1%). The most common cause was depressive pseudodementia in eight patients followed by vitamin B12 deficiency in six patients. A significant amount of our patients showed laboratory or imaging changes suggestive of potentially reversible causes of the dementia syndrome upon admission. The results of our study indicate the importance of careful differential diagnosis of dementia based on the recommendations of guidelines. Although therapy of these potential causes is not always accompanied by a full recovery, the identification and therapy of treatable causes of cognitive deficits are possible even for general practitioners, who often are the primary contact persons of affected individuals.
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Affiliation(s)
- Marija Djukic
- Department of Neuropathology, University Medicine Göttingen, Robert-Koch-Str. 40, 37075, Göttingen, Germany,
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Noda M. Possible role of glial cells in the relationship between thyroid dysfunction and mental disorders. Front Cell Neurosci 2015; 9:194. [PMID: 26089777 PMCID: PMC4452882 DOI: 10.3389/fncel.2015.00194] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Accepted: 05/04/2015] [Indexed: 12/12/2022] Open
Abstract
It is widely accepted that there is a close relationship between the endocrine system and the central nervous system (CNS). Among hormones closely related to the nervous system, thyroid hormones (THs) are critical for the development and function of the CNS; not only for neuronal cells but also for glial development and differentiation. Any impairment of TH supply to the developing CNS causes severe and irreversible changes in the overall architecture and function of the human brain, leading to various neurological dysfunctions. In the adult brain, impairment of THs, such as hypothyroidism and hyperthyroidism, can cause psychiatric disorders such as schizophrenia, bipolar disorder, anxiety and depression. Although impact of hypothyroidism on synaptic transmission and plasticity is known, its effect on glial cells and related cellular mechanisms remain enigmatic. This mini-review article summarizes how THs are transported into the brain, metabolized in astrocytes and affect microglia and oligodendrocytes, demonstrating an example of glioendocrine system. Neuroglial effects may help to understand physiological and/or pathophysiological functions of THs in the CNS and how hypo- and hyper-thyroidism may cause mental disorders.
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Affiliation(s)
- Mami Noda
- Laboratory of Pathophysiology, Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku Fukuoka, Japan
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77
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Ritchie M, Yeap BB. Thyroid hormone: Influences on mood and cognition in adults. Maturitas 2015; 81:266-75. [DOI: 10.1016/j.maturitas.2015.03.016] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Accepted: 03/22/2015] [Indexed: 10/23/2022]
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78
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Medici M, Visser WE, Visser TJ, Peeters RP. Genetic determination of the hypothalamic-pituitary-thyroid axis: where do we stand? Endocr Rev 2015; 36:214-44. [PMID: 25751422 DOI: 10.1210/er.2014-1081] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
For a long time it has been known that both hypo- and hyperthyroidism are associated with an increased risk of morbidity and mortality. In recent years, it has also become clear that minor variations in thyroid function, including subclinical dysfunction and variation in thyroid function within the reference range, can have important effects on clinical endpoints, such as bone mineral density, depression, metabolic syndrome, and cardiovascular mortality. Serum thyroid parameters show substantial interindividual variability, whereas the intraindividual variability lies within a narrow range. This suggests that every individual has a unique hypothalamus-pituitary-thyroid axis setpoint that is mainly determined by genetic factors, and this heritability has been estimated to be 40-60%. Various mutations in thyroid hormone pathway genes have been identified in persons with thyroid dysfunction or altered thyroid function tests. Because these causes are rare, many candidate gene and linkage studies have been performed over the years to identify more common variants (polymorphisms) associated with thyroid (dys)function, but only a limited number of consistent associations have been found. However, in the past 5 years, advances in genetic research have led to the identification of a large number of new candidate genes. In this review, we provide an overview of the current knowledge about the polygenic basis of thyroid (dys)function. This includes new candidate genes identified by genome-wide approaches, what insights these genes provide into the genetic basis of thyroid (dys)function, and which new techniques will help to further decipher the genetic basis of thyroid (dys)function in the near future.
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Affiliation(s)
- Marco Medici
- Rotterdam Thyroid Center, Department of Internal Medicine, Erasmus Medical Center, 3015 GE Rotterdam, The Netherlands
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79
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Wang Y, Sheng Q, Hou X, Wang B, Zhao W, Yan S, Wang Y, Zhao S. Thyrotropin and Alzheimer’s Disease Risk in the Elderly: a Systematic Review and Meta-Analysis. Mol Neurobiol 2015; 53:1229-1236. [DOI: 10.1007/s12035-014-9078-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Accepted: 12/29/2014] [Indexed: 11/28/2022]
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Arendt T, Stieler J, Holzer M. Brain hypometabolism triggers PHF-like phosphorylation of tau, a major hallmark of Alzheimer's disease pathology. J Neural Transm (Vienna) 2014; 122:531-9. [PMID: 25480630 DOI: 10.1007/s00702-014-1342-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Accepted: 11/21/2014] [Indexed: 11/26/2022]
Abstract
Sporadic Alzheimer's disease (AD) is a chronic progressive neurodegenerative disorder of unknown cause characterized by fibrillar accumulation of the Aß-peptide and aggregates of the microtubule-associated protein tau in a hyperphosphorylated form. Already at preclinical stages, AD is characterized by hypometabolic states which are a good predictor of cognitive decline. Here, we summarize recent evidence derived from the study of hibernating animals that brain hypometabolism can trigger PHF-like hyperphosphorylation of tau. We put forward the concept that particular types of neurons respond to a hypometabolic state with an elevated phosphorylation of tau protein which represents a physiological mechanism involved in regulating synaptic gain. If, in contrast to hibernation, the hypometabolic state is not terminated after a definite time but rather persists and progresses, the elevated phosphorylation of tau protein endures and the protective reaction associated with it might turn into a pathological cascade leading to neurodegeneration.
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Affiliation(s)
- Thomas Arendt
- Paul Flechsig Institute of Brain Research, University of Leipzig, Jahnallee 59, 04109, Leipzig, Germany,
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81
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de Bruijn RFAG, Ikram MA. Cardiovascular risk factors and future risk of Alzheimer's disease. BMC Med 2014; 12:130. [PMID: 25385322 PMCID: PMC4226863 DOI: 10.1186/s12916-014-0130-5] [Citation(s) in RCA: 223] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Accepted: 07/15/2014] [Indexed: 11/16/2022] Open
Abstract
Alzheimer's disease (AD) is the most common neurodegenerative disorder in elderly people, but there are still no curative options. Senile plaques and neurofibrillary tangles are considered hallmarks of AD, but cerebrovascular pathology is also common. In this review, we summarize findings on cardiovascular disease (CVD) and risk factors in the etiology of AD. Firstly, we discuss the association of clinical CVD (such as stroke and heart disease) and AD. Secondly, we summarize the relation between imaging makers of pre-clinical vascular disease and AD. Lastly, we discuss the association of cardiovascular risk factors and AD. We discuss both established cardiovascular risk factors and emerging putative risk factors, which exert their effect partly via CVD.
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Affiliation(s)
| | - M Arfan Ikram
- Department of Epidemiology, Erasmus MC University Medical Center, Wytemaweg 80, Rotterdam, 3015, CN, the Netherlands.
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82
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Ng MCW, Loo YX, Poon ZM. Subclinical Thyroid Disorders: Clinical Significance and When to Treat? PROCEEDINGS OF SINGAPORE HEALTHCARE 2014. [DOI: 10.1177/201010581402300308] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Subclinical thyroid disorders are commonly encountered in the primary care setting. This article aims to review the latest evidence and guidelines pertaining to the management of subclinical hypo- and hyperthyroidism, in particular the important decision of when treatment should be considered.
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83
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Bhumika S, Darras VM. Role of thyroid hormones in different aspects of nervous system regeneration in vertebrates. Gen Comp Endocrinol 2014; 203:86-94. [PMID: 24681191 DOI: 10.1016/j.ygcen.2014.03.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2013] [Revised: 03/08/2014] [Accepted: 03/11/2014] [Indexed: 12/19/2022]
Abstract
Spontaneous functional recovery from injury in the adult human nervous system is rare and trying to improve recovery remains a clinical challenge. Nervous system regeneration is a complicated sequence of events involving cell death or survival, cell proliferation, axon extension and remyelination, and finally reinnervation and functional recovery. Successful recovery depends on the cell-specific and time-dependent activation and repression of a wide variety of growth factors and guidance molecules. Thyroid hormones (THs), well known for their regulatory role in neurodevelopment, have recently emerged as important modulators of neuroregeneration. This review focuses on the endogenous changes in the proteins regulating TH availability and action in different cell types of the adult mammalian nervous system during regeneration as well as the impact of TH supplementation on the consecutive steps in this process. It also addresses possible differences in TH involvement between different vertebrate classes, early or late developmental stages and peripheral or central nervous system. The available data show that THs are able to stimulate many signaling pathways necessary for successful neurogeneration. They however also suggest that supplementation with T4 and/or T3 may have beneficial or detrimental influences depending on the dose and more importantly on the specific phase of the regeneration process.
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Affiliation(s)
- Stitipragyan Bhumika
- Laboratory of Comparative Endocrinology, Division Animal Physiology and Neurobiology, Biology Department, KU Leuven, B-3000 Leuven, Belgium
| | - Veerle M Darras
- Laboratory of Comparative Endocrinology, Division Animal Physiology and Neurobiology, Biology Department, KU Leuven, B-3000 Leuven, Belgium.
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84
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Fatourechi MM, Fatourechi V. An update on subclinical hypothyroidism and subclinical hyperthyroidism. Expert Rev Endocrinol Metab 2014; 9:137-151. [PMID: 30743756 DOI: 10.1586/17446651.2014.887433] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Subclinical thyroid dysfunction is characterized by normal levels of peripheral thyroid hormone, paired with a TSH level that is either lower than (subclinical hyperthyroidism) or higher than (subclinical hypothyroidism) the normal laboratory reference range. Slight shifts in peripheral hormone levels result in significant serum TSH changes. The exact upper limit of normal TSH and the management of subclinical hypothyroidism are still controversial. For those with TSH between high upper limit of normal and 10 mIU/L, the authors suggest selective use of thyroxine therapy. The authors agree with the general consensus in favor of therapy for those with serum TSH levels above 10 mIU/L. This recommendation is compatible with guidelines of American Thyroid Association and American Association of Clinical Endocrinologists. For subclinical hyperthyroidism persistent serum TSH <0.1 mIU/L should be treated particularly if the etiology is nodular toxic goiter. For serum TSH between 0.1 mIU/L and lower limit of normal, serum TSH co-morbidities such as cardiac risk factors and osteoporosis may favor therapy.
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Affiliation(s)
| | - Vahab Fatourechi
- b Division of Endocrinology, Diabetes, Metabolism and Nutrition, Mayo Clinic, Rochester, MN, USA
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85
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Moon JH, Park YJ, Kim TH, Han JW, Choi SH, Lim S, Park DJ, Kim KW, Jang HC. Lower-but-normal serum TSH level is associated with the development or progression of cognitive impairment in elderly: Korean Longitudinal Study on Health and Aging (KLoSHA). J Clin Endocrinol Metab 2014; 99:424-32. [PMID: 24285689 DOI: 10.1210/jc.2013-3385] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
CONTEXT The association between subclinical hyperthyroidism and the risk of dementia has been validated in several studies. However, the effect of thyroid function within reference range on the risk of cognitive dysfunction including mild cognitive impairment (MCI) and dementia is still unclear. OBJECTIVE Our aim was to investigate the association between thyroid function and the risk of MCI and dementia in euthyroid elderly subjects. DESIGN, SETTING, AND PARTICIPANTS We conducted a population-based prospective study as a part of the Korean Longitudinal Study on Health and Aging. A total of 313 participants who were euthyroid and nondemented at baseline and completed cognitive function tests at a 5-year follow-up evaluation (mean age 72.5 ± 6.9 y) were analyzed in the present study. MAIN OUTCOME MEASURE Baseline thyroid function was compared according to the development of MCI or dementia during the study period. Binary logistic regression analysis was performed to investigate the independent association between thyroid function and cognitive impairment. RESULTS At baseline evaluation, 237 subjects were cognitively normal, and 76 subjects had MCI. Diagnoses of cognitive function in 259 subjects remained unchanged or improved during the study period (nonprogression group), whereas 54 subjects showed progression of cognitive impairment to MCI or dementia (progression group). In the progression group, baseline serum TSH levels were lower than those in nonprogression group. Baseline serum free T₄ levels were not significantly different between these two groups. The association between lower baseline serum TSH levels and the development of MCI or dementia was maintained after adjustment for conventional baseline risk factors. CONCLUSIONS Lower serum TSH level within the reference range was independently associated with the risk of cognitive impairment including MCI and dementia in elderly subjects.
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Affiliation(s)
- Jae Hoon Moon
- Department of Internal Medicine (J.H.M., S.H.C., S.L., H.C.J.) and Neuropsychiatry (T.H.K., J.W.H., K.W.K.), Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam 463-707, Korea; and Department of Internal Medicine (Y.J.P., D.J.P.), Seoul National University Hospital, Seoul National University College of Medicine, Seoul 110-799, Korea
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86
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Abstract
Dementia is currently diagnosed based on clinical symptoms and signs, but significant brain damage has already occurred by the time a clinical diagnosis of dementia is made, and it is increasingly recognized that this may be too late for any effective intervention. It would therefore be of great public health and preventive value to define a variety of biomarkers that could permit early detection of persons at a higher risk for developing dementia, and specifically dementia due to Alzheimer's disease. Nevertheless, for the purpose of large-scale screening, circulating biomarkers are more appropriate because they are less invasive than lumbar puncture, less costly than brain amyloid imaging and can be easily assessed repeatedly in a primary care clinic setting. In this brief review we will review a number of candidate molecules implicated as possible predictors of dementia risk. These candidates include markers of vascular injury, metabolic and inflammatory states, amyloid and tau pathway markers, measures of neural degeneration and repair efforts, and other molecules that might contribute to anatomical and functional changes characteristic of dementia and Alzheimer's disease.
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Affiliation(s)
- Galit Weinstein
- Department of Neurology, Boston University School of Medicine, B602, 72 East Concord Street, Boston, MA 02118, USA
- Framingham Heart Study, 73 Mount Wayte Avenue, Framingham, MA 01702, USA
| | - Sudha Seshadri
- Department of Neurology, Boston University School of Medicine, B602, 72 East Concord Street, Boston, MA 02118, USA
- Framingham Heart Study, 73 Mount Wayte Avenue, Framingham, MA 01702, USA
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Villanueva I, Alva-Sánchez C, Pacheco-Rosado J. The role of thyroid hormones as inductors of oxidative stress and neurodegeneration. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2013; 2013:218145. [PMID: 24386502 PMCID: PMC3872098 DOI: 10.1155/2013/218145] [Citation(s) in RCA: 117] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2013] [Accepted: 11/08/2013] [Indexed: 01/14/2023]
Abstract
Reactive oxygen species (ROS) are oxidizing agents amply implicated in tissue damage. ROS production is inevitably linked to ATP synthesis in most cells, and the rate of production is related to the rate of cell respiration. Multiple antioxidant mechanisms limit ROS dispersion and interaction with cell components, but, when the balance between ROS production and scavenging is lost, oxidative damage develops. Many traits of aging are related to oxidative damage by ROS, including neurodegenerative diseases. Thyroid hormones (THs) are a major factor controlling metabolic and respiratory rates in virtually all cell types in mammals. The general metabolic effect of THs is a relative acceleration of the basal metabolism that includes an increase of the rate of both catabolic and anabolic reactions. THs are related to oxidative stress not only by their stimulation of metabolism but also by their effects on antioxidant mechanisms. Thyroid dysfunction increases with age, so changes in THs levels in the elderly could be a factor affecting the development of neurodegenerative diseases. However, the relationship is not always clear. In this review, we analyze the participation of thyroid hormones on ROS production and oxidative stress, and the way the changes in thyroid status in aging are involved in neurodegenerative diseases.
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Affiliation(s)
- I. Villanueva
- Departamento de Fisiología, Escuela Nacional de Ciencias Biológicas, IPN. Prol. Carpio y Plan de Ayala, s/n, 11340 México City, DF, Mexico
| | - C. Alva-Sánchez
- Departamento de Fisiología, Escuela Nacional de Ciencias Biológicas, IPN. Prol. Carpio y Plan de Ayala, s/n, 11340 México City, DF, Mexico
| | - J. Pacheco-Rosado
- Departamento de Fisiología, Escuela Nacional de Ciencias Biológicas, IPN. Prol. Carpio y Plan de Ayala, s/n, 11340 México City, DF, Mexico
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89
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Agarwal R, Kushwaha S, Chhillar N, Kumar A, Dubey DK, Tripathi CB. A cross-sectional study on thyroid status in North Indian elderly outpatients with dementia. Ann Indian Acad Neurol 2013; 16:333-7. [PMID: 24101811 PMCID: PMC3788275 DOI: 10.4103/0972-2327.116916] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2012] [Revised: 06/25/2012] [Accepted: 07/20/2012] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND Several population based studies have demonstrated an association between hypo-or hyperthyroidism and dementia in last two decades. As a consequence, thyroid stimulating hormone has become part of the screening laboratory test for dementia. AIM The aim of the present study was to evaluate the association between thyroid function and Alzheimer's disease (AD) and vascular dementia (VaD) and to determine the risk of AD and VaD in clinically euthyroid patients. MATERIALS AND METHODS A cross-sectional hospital based study was carried out in subjects diagnosed with AD/VaD and were assessed for thyroid status as routine screening test. RESULTS Free T3, free T4 and TSH were studied in 114 AD patients (mean age: 65 years), 35 VaD patients (mean age: 62 years) and 105 control subjects (mean age: 62 years). In AD group, TSH levels were significantly lower than controls (P = 0.00) and for each unit increase in TSH level, the odds of having dementia decreased by 37.1%. No such relation was seen in VaD. CONCLUSION The results suggest a consistent association of subclinical hyperthyroidism and AD.
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Affiliation(s)
- Rachna Agarwal
- Department of Neurochemistry, Institute of Human Behaviour and Allied Sciences, Delhi, India
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90
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A clinical review of the association of thyroid stimulating hormone and cognitive impairment. ISRN ENDOCRINOLOGY 2013; 2013:856017. [PMID: 24171118 PMCID: PMC3793467 DOI: 10.1155/2013/856017] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/29/2013] [Accepted: 08/26/2013] [Indexed: 11/29/2022]
Abstract
Clinical and subclinical hypothyroidism as well as overt hyperthyroidism in middle-aged and elderly adults are both associated with decreased cognitive functioning as memory, reaction time, and visuospatial organization. Subclinical hyperthyroidism (SH) or low serum concentrations of TSH concentrations have been associated with dementia in previous epidemiological studies, but the association in the elderly has not been established. There is little or no consensus regarding how thyroid function is associated with cognitive performance in the elderly. In this focused review, we have performed an examination between eleven studies from the last five years examining the association between thyroid function and cognitive performance in elderly people, a group who is overrepresented among individuals with minor abnormalities in serum TSH and thyroid hormone concentration. Six of the studies showed a consistent finding of an association between SH with cognitive impairment or dementia. In general, taking into account the largest and most powerfully designed studies, there is a strong body of evidence supporting the association between SH and cognitive impairment. The scarce number of publications on these topics indicates the need of more research especially regarding longitudinal and interventional studies thus hopefully enabling confirmation or rejection of causality between TSH abnormalities and dementia.
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91
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Rota C, Rimbach G, Minihane AM, Stoecklin E, Barella L. Dietary vitamin E modulates differential gene expression in the rat hippocampus: Potential implications for its neuroprotective properties. Nutr Neurosci 2013; 8:21-9. [PMID: 15909764 DOI: 10.1080/10284150400027123] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A wide range of cell culture, animal and human epidemiological studies are suggestive of a role of vitamin E (VE) in brain function and in the prevention of neurodegeneration. However, the underlying molecular mechanisms remain largely unknown. In the current investigation Affymetrix gene chip technology was utilised to establish the impact of chronic VE deficiency on hippocampal genes expression. Male albino rats were fed either a VE deficient or standard diet (60 mg/kg feed) for a period of 9 months. Rats were sacrificed, the hippocampus removed and genes expression established in individual animals. VE deficiency showed to have a strong impact on genes expression in the hippocampus. An important number of genes found to be regulated by VE was associated with hormones and hormone metabolism, nerve growth factor, apoptosis, dopaminergic neurotransmission, and clearance of amyloid-beta and advanced glycated endproducts. In particular, VE strongly affected the expression of an array of genes encoding for proteins directly or indirectly involved in the clearance of amyloid beta, changes which are consistent with a protective effect of VE on Alzheimer's disease progression.
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Affiliation(s)
- Cristina Rota
- Hugh Sinclair Human Nutrition Unit, School of Food Biosciences, University of Reading, Whiteknights, Reading, RG6 6AP, UK
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92
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Maggio M, Colizzi E, Fisichella A, Valenti G, Ceresini G, Dall’Aglio E, Ruffini L, Lauretani F, Parrino L, Ceda GP. Stress hormones, sleep deprivation and cognition in older adults. Maturitas 2013; 76:22-44. [DOI: 10.1016/j.maturitas.2013.06.006] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2013] [Accepted: 06/05/2013] [Indexed: 12/20/2022]
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93
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Feldman AZ, Shrestha RT, Hennessey JV. Neuropsychiatric manifestations of thyroid disease. Endocrinol Metab Clin North Am 2013; 42:453-76. [PMID: 24011880 DOI: 10.1016/j.ecl.2013.05.005] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The interface between thyroid hormone action and neuropsychiatric function is intricate, and several mechanisms of thyroid hormone uptake into brain tissues, hormone activation, and influences on neurotransmitter generation have been identified. Symptoms of hypothyroidism are nonspecific, whereas those attributed to thyrotoxicosis may be more characteristic. Neuropsychiatric manifestations triggered by thyroid dysfunction likely respond well to reestablishment of the euthyroid state, although some patients have persistent complaints. The addition of LT3 to ongoing LT4 replacement has yet to be definitively shown to be advantageous. Treatment of euthyroid depression with LT3 in addition to antidepressant therapy lacks convincing evidence of superior outcomes.
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Affiliation(s)
- Anna Z Feldman
- Division of Endocrinology, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Ave, Gryzmish 6, Boston, MA 02215, USA
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94
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Johansson P, Almqvist EG, Johansson JO, Mattsson N, Hansson O, Wallin A, Blennow K, Zetterberg H, Svensson J. Reduced cerebrospinal fluid level of thyroxine in patients with Alzheimer's disease. Psychoneuroendocrinology 2013; 38:1058-66. [PMID: 23159010 DOI: 10.1016/j.psyneuen.2012.10.012] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2012] [Revised: 10/15/2012] [Accepted: 10/16/2012] [Indexed: 12/14/2022]
Abstract
BACKGROUND Little is known of the association between thyroid hormones in the central nervous system and Alzheimer's disease (AD). We determined thyroid hormone levels in serum and cerebrospinal fluid (CSF) in a well-defined homogeneous mono-center population. METHODS Fifty-nine consecutive patients under primary evaluation for cognitive impairment were recruited. The participants included patients with AD or mild cognitive impairment (MCI) diagnosed with AD upon follow-up (n=31), patients with stable MCI (SMCI, n=13), patients with other dementias (n=15), and healthy controls (n=19). Thyroid hormones in serum and CSF and AD biomarkers in CSF were analyzed using established immunochemical assays. Cognitive impairment was estimated using mini-mental state examination (MMSE). RESULTS Serum levels of free and total thyroxine (T4) and triiodothyronine (T3) were similar in all groups whereas a marginal increase in serum thyroid-stimulating hormone (TSH) level was observed in the AD patients. The CSF level of total T4 was decreased in patients with AD and other dementias compared to SMCI (both P=0.01) and healthy controls (both P=0.001), whereas CSF levels of TSH and total T3 were unchanged. In the total study population, CSF total T4 level correlated positively with MMSE score (r=0.26, P<0.05) and negatively with CSF total-tau (T-Tau) level (r=-0.23, P<0.05). CONCLUSION Patients with AD as well as other dementias had signs of mild brain hypothyroidism, which could only to a small extent be detected in serum values.
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Affiliation(s)
- Per Johansson
- Department of Neuropsychiatry, Skaraborg Hospital, Falköping, Sweden
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95
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Ceresini G, Ceda GP, Lauretani F, Maggio M, Usberti E, Marina M, Bandinelli S, Guralnik JM, Valenti G, Ferrucci L. Thyroid status and 6-year mortality in elderly people living in a mildly iodine-deficient area: the aging in the Chianti Area Study. J Am Geriatr Soc 2013; 61:868-874. [PMID: 23647402 PMCID: PMC3686888 DOI: 10.1111/jgs.12267] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
OBJECTIVES To test the hypothesis that, in older adults, living in a mildly iodine-deficient area, thyroid dysfunction may be associated with mortality independent of potential confounders. DESIGN Longitudinal. SETTING Community-based. PARTICIPANTS Nine hundred fifty-one individuals aged 65 and older. MEASUREMENTS Plasma thyrotropin, free thyroxine, and free triiodothyronine concentrations and demographic features were evaluated in participants of the Invecchiare in Chianti Study aged 65 and older. Participants were classified according to thyroid function test. Kaplan-Meier survival and Cox proportional hazards models adjusted for confounders were used in the analysis. RESULTS Eight hundred nineteen participants were euthyroid, 83 had subclinical hyperthyroidism (SHyper), and 29 had subclinical hypothyroidism (SHypo). Overt hypo- and hyperthyroidism were found in five and 15 subjects, respectively. During a median of 6 years of follow-up, 210 deaths occurred (22.1%), 98 (46.6%) of which were from cardiovascular causes. Kaplan-Meier analysis revealed higher overall mortality for SHyper (P = .04) than euthyroid subjects. After adjusting for multiple confounders, participants with SHyper (hazard ratio (HR) = 1.65, 95% confidence interval (CI) = 1.02-2.69) had significantly higher all-cause mortality than those with normal thyroid function. No significant association was found between SHyper and cardiovascular mortality. In euthyroid subjects, thyrotropin was found to be predictive of lower risk of all-cause mortality (HR = 0.76, 95% CI = 0.57-0.99). CONCLUSION SHyper is an independent risk factor for all-cause mortality in older adults. Low to normal circulating thyrotropin should be carefully monitored in elderly euthyroid individuals.
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Affiliation(s)
- Graziano Ceresini
- Department Clinical and Experimental Medicine, Geriatric Endocrine Unit, University Hospital of Parma, Italy
| | - Gian Paolo Ceda
- Department Clinical and Experimental Medicine, Geriatric Endocrine Unit, University Hospital of Parma, Italy
| | | | - Marcello Maggio
- Department Clinical and Experimental Medicine, Geriatric Endocrine Unit, University Hospital of Parma, Italy
| | - Elisa Usberti
- Department Clinical and Experimental Medicine, Geriatric Endocrine Unit, University Hospital of Parma, Italy
| | - Michela Marina
- Department Clinical and Experimental Medicine, Geriatric Endocrine Unit, University Hospital of Parma, Italy
| | | | - Jack M. Guralnik
- Laboratory of Epidemiology, Demography, and Biometry, National Institute on Aging, Baltimore, MD, USA
| | - Giorgio Valenti
- Department Clinical and Experimental Medicine, Geriatric Endocrine Unit, University Hospital of Parma, Italy
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96
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Circadian rhythm of TSH levels in subjects with Alzheimer's disease (AD). Aging Clin Exp Res 2013; 25:153-7. [PMID: 23739900 DOI: 10.1007/s40520-013-0025-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2012] [Accepted: 05/25/2012] [Indexed: 10/27/2022]
Abstract
OBJECTIVES The circadian rhythm of serum thyroid stimulating hormone (TSH) levels in patients with Alzheimer's disease was measured by means of a case-control study. METHODS Serum samples from cases and controls were collected continuously for 2 days, and then once every 2 h (even number time-point during the first day and odd number time-point in the second). TSH was detected by radioimmunoassay. RESULTS AD patients had no significant circadian rhythm in serum TSH levels, whereas normal controls did. In normal controls, serum TSH levels from 19:00 to 20:00 were the lowest (19:00, 3.89 ± 0.97 mIU/L; 20:00, 3.76 ± 0.84 mIU/L) and those in the period 2:00-4:00 were the highest (2:00, 6.15 ± 0.94 mIU/L; 3:00, 6.32 ± 1.04 mIU/L; 4:00, 6.39 ± 1.13 mIU/L; F = 6.762, df = 23, P = 0.002). However, in AD patients, 24-h serum TSH levels were 3.80-4.03 mIU/L (F = 0.897, df = 23, P = 0.996). At the 24 time-points, except for the four time-points from 16:00 to 19:00, TSH levels in AD patients were significantly lower than those in normal controls. CONCLUSIONS The circadian rhythm of serum TSH levels in AD patients did not appear, and their serum TSH levels were significantly lower than those in normal controls. SIGNIFICANCE The circadian rhythm in serum TSH levels in AD patients differs greatly from that of the general population.
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97
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Wijsman LW, de Craen AJM, Trompet S, Gussekloo J, Stott DJ, Rodondi N, Welsh P, Jukema JW, Westendorp RGJ, Mooijaart SP. Subclinical thyroid dysfunction and cognitive decline in old age. PLoS One 2013; 8:e59199. [PMID: 23554996 PMCID: PMC3595244 DOI: 10.1371/journal.pone.0059199] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2012] [Accepted: 02/12/2013] [Indexed: 01/07/2023] Open
Abstract
Background Subclinical thyroid dysfunction has been implicated as a risk factor for cognitive decline in old age, but results are inconsistent. We investigated the association between subclinical thyroid dysfunction and cognitive decline in the PROspective Study of Pravastatin in the Elderly at Risk (PROSPER). Methods Prospective longitudinal study of men and women aged 70–82 years with pre-existing vascular disease or more than one risk factor to develop this condition (N = 5,154). Participants taking antithyroid medications, thyroid hormone supplementation and/or amiodarone were excluded. Thyroid function was measured at baseline: subclinical hyper- and hypothyroidism were defined as thyroid stimulating hormones (TSH) <0.45 mU/L or >4.50 mU/L respectively, with normal levels of free thyroxine (FT4). Cognitive performance was tested at baseline and at four subsequent time points during a mean follow-up of 3 years, using five neuropsychological performance tests. Results Subclinical hyperthyroidism and hypothyroidism were found in 65 and 161 participants, respectively. We found no consistent association of subclinical hyper- or hypothyroidism with altered cognitive performance compared to euthyroid participants on the individual cognitive tests. Similarly, there was no association with rate of cognitive decline during follow-up. Conclusion We found no consistent evidence that subclinical hyper- or hypothyroidism contribute to cognitive impairment or decline in old age. Although our data are not in support of treatment of subclinical thyroid dysfunction to prevent cognitive dysfunction in later life, only large randomized controlled trials can provide definitive evidence.
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Affiliation(s)
- Liselotte W. Wijsman
- Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands
| | - Anton J. M. de Craen
- Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands
| | - Stella Trompet
- Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands
- Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands
| | - Jacobijn Gussekloo
- Department of Public Health and Primary Care, Leiden University Medical Center, Leiden, The Netherlands
| | - David J. Stott
- Academic Section of Geriatric Medicine, Faculty of Medicine, University of Glasgow, Glasgow, Scotland
| | - Nicolas Rodondi
- Department of General Internal Medicine, Inselhospital, University of Bern, Bern, Switzerland
| | - Paul Welsh
- British Heart Foundation Glasgow Cardiovascular Research Centre, University of Glasgow, Glasgow, Scotland
| | - J. Wouter Jukema
- Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands
| | - Rudi G. J. Westendorp
- Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands
| | - Simon P. Mooijaart
- Department of Gerontology and Geriatrics, Leiden University Medical Center, Leiden, The Netherlands
- Institute for Evidence-Based Medicine in Old Age | IEMO, Leiden, The Netherlands
- * E-mail:
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98
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Huckans M, Hutson L, Twamley E, Jak A, Kaye J, Storzbach D. Efficacy of cognitive rehabilitation therapies for mild cognitive impairment (MCI) in older adults: working toward a theoretical model and evidence-based interventions. Neuropsychol Rev 2013; 23:63-80. [PMID: 23471631 DOI: 10.1007/s11065-013-9230-9] [Citation(s) in RCA: 106] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Accepted: 02/15/2013] [Indexed: 02/04/2023]
Abstract
To evaluate the efficacy of cognitive rehabilitation therapies (CRTs) for mild cognitive impairment (MCI). Our review revealed a need for evidence-based treatments for MCI and a lack of a theoretical rehabilitation model to guide the development and evaluation of these interventions. We have thus proposed a theoretical rehabilitation model of MCI that yields key intervention targets-cognitive compromise, functional compromise, neuropsychiatric symptoms, and modifiable risk and protective factors known to be associated with MCI and dementia. Our model additionally defines specific cognitive rehabilitation approaches that may directly or indirectly target key outcomes-restorative cognitive training, compensatory cognitive training, lifestyle interventions, and psychotherapeutic techniques. Fourteen randomized controlled trials met inclusion criteria and were reviewed. Studies markedly varied in terms of intervention approaches and selected outcome measures and were frequently hampered by design limitations. The bulk of the evidence suggested that CRTs can change targeted behaviors in individuals with MCI and that CRTs are associated with improvements in objective cognitive performance, but the pattern of effects on specific cognitive domains was inconsistent across studies. Other important outcomes (i.e., daily functioning, quality of life, neuropsychiatric symptom severity) were infrequently assessed across studies. Few studies evaluated long-term outcomes or the impact of CRTs on conversion rates from MCI to dementia or normal cognition. Overall, results from trials are promising but inconclusive. Additional well-designed and adequately powered trials are warranted and required before CRTs for MCI can be considered evidence-based.
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Affiliation(s)
- Marilyn Huckans
- Research & Development Service, Portland VA Medical Center, 3710 SW U.S. Veterans Hospital Rd, Portland, OR 97239, USA.
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99
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Ishida E, Hashimoto K, Okada S, Satoh T, Yamada M, Mori M. Thyroid hormone receptor and liver X receptor competitively up-regulate human selective Alzheimer’s disease indicator-1 gene expression at the transcriptional levels. Biochem Biophys Res Commun 2013; 432:513-8. [DOI: 10.1016/j.bbrc.2013.02.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Accepted: 02/04/2013] [Indexed: 10/27/2022]
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100
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Carswell JM, Gordon JH, Popovsky E, Hale A, Brown RS. Generic and brand-name L-thyroxine are not bioequivalent for children with severe congenital hypothyroidism. J Clin Endocrinol Metab 2013; 98:610-7. [PMID: 23264396 PMCID: PMC3565118 DOI: 10.1210/jc.2012-3125] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
CONTEXT In the United States, generic substitution of levothyroxine (L-T(4)) by pharmacists is permitted if the formulations are deemed to be bioequivalent by the Federal Drug Administration, but there is widespread concern that the pharmacokinetic standard used is too insensitive. OBJECTIVE We aimed to evaluate the bioequivalence of a brand-name L-T(4) (Synthroid) and an AB-rated generic formulation (Sandoz, Princeton, NJ) in children with severe hypothyroidism. DESIGN This was a prospective randomized crossover study in which patients received 8 weeks of one L-T(4) formulation followed by 8 weeks of the other. SETTING The setting was an academic medical center. PATIENTS Of 31 children with an initial serum TSH concentration >100 mU/L, 20 had congenital hypothyroidism (CH), and 11 had autoimmune thyroiditis. MAIN OUTCOME MEASURES The primary endpoint was the serum TSH concentration. Secondary endpoints were the free T(4) and total T(3) concentrations. RESULTS The serum TSH concentration was significantly lower after 8 weeks of Synthroid than after generic drug (P = .002), but thyroid hormone levels did not differ significantly. Subgroup analysis revealed that the difference in TSH was restricted to patients with CH (P = .0005). Patients with CH required a higher L-T(4) dose (P < .0004) and were younger (P = .003) but were not resistant to thyroid hormone; 15 of 16 CH patients had severe thyroid dysgenesis or agenesis on imaging. The response to generic vs brand-name preparation remained significant when adjusted for age. CONCLUSIONS Synthroid and an AB-rated generic L-T(4) are not bioequivalent for patients with severe hypothyroidism due to CH, probably because of diminished thyroid reserve. It would therefore seem prudent not to substitute L-T(4) formulations in patients with severe CH, particularly in those <3 yr of age. Our results may have important implications for other severely hypothyroid patients in whom precise titration of L-T(4) is necessary.
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Affiliation(s)
- Jeremi M Carswell
- Division of Endocrinology, Boston Children's Hospital, 300 Longwood Avenue, Boston, Massachusetts 02115, USA
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