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Paisdzior S, Schuelke M, Krude H. What is the Role of Thyroid Hormone Receptor Alpha 2 (TRα2) in Human Physiology? Exp Clin Endocrinol Diabetes 2022; 130:296-302. [PMID: 35255520 DOI: 10.1055/a-1716-7980] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Thyroid hormone receptors are nuclear receptors that function as transcription factors and are regulated by thyroid hormones. To date, a number of variants and isoforms are known. This review focuses on the thyroid hormone receptor α (TRα), in particular TRα2, an isoform that arises from alternative splicing of the THRA mRNA transcript. Unlike the TRα1 isoform, which can bind T3, the TRα2 isoform lacks a ligand-binding domain but still binds to DNA thereby antagonizing the transcriptional activity of TRα1. Although a regulatory role has been proposed, the physiological function of this TRα2 antagonism is still unclear due to limited in vitro and mouse model data. Recently, the first patients with resistance to thyroid hormone due to mutations in THRA, the TRα encoding gene, affecting the antagonistic function of TRα2 were described, suggesting a significant role of this particular isoform in human physiology.
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Affiliation(s)
- Sarah Paisdzior
- Institute of Experimental Pediatric Endocrinology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Markus Schuelke
- NeuroCure Cluster of Excellence; Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany.,Department of Neuropediatrics, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Heiko Krude
- Institute of Experimental Pediatric Endocrinology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
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Abstract
Resistance to thyroid hormone alpha occurs due to pathogenic, heterozygous variants in THRA. The entity was first described in 2012 and to date only a small number of patients with varying severity have been reported. In this review, we summarize and interpret the heterogeneous clinical and laboratory features of all published cases, including ours. Many symptoms and findings are similar to those seen in primary hypothyroidism. However, thyroid-stimulating hormone levels are normal. Free triiodothyronine (T3) levels are in the upper half of normal range or frankly high and free thyroxine (T4) levels are low or in the lower half of normal range. Alterations in free T3 and free T4 may not be remarkable, particularly in adults, possibly contributing to underdiagnosis. In such patients, low reverse T3 levels, normo- or macrocytic anemia or, particularly in children, mildly elevated creatine kinase levels would warrant THRA sequencing. Treatment with L-thyroxine results in improvement of some clinical findings.
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Affiliation(s)
- İbrahim Mert Erbaş
- Dokuz Eylül University Faculty of Medicine, Department of Pediatric Endocrinology, İzmir, Turkey
| | - Korcan Demir
- Dokuz Eylül University Faculty of Medicine, Department of Pediatric Endocrinology, İzmir, Turkey,* Address for Correspondence: Dokuz Eylül University Faculty of Medicine, Department of Pediatric Endocrinology, İzmir, Turkey Phone: +90 232 412 60 77 E-mail:
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Głombik K, Detka J, Kurek A, Budziszewska B. Impaired Brain Energy Metabolism: Involvement in Depression and Hypothyroidism. Front Neurosci 2020; 14:586939. [PMID: 33343282 PMCID: PMC7746780 DOI: 10.3389/fnins.2020.586939] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 11/09/2020] [Indexed: 12/14/2022] Open
Abstract
Although hypothyroidism appears to be an important factor in the pathogenesis of depression, the impact of thyroid hormones on the bioenergetics of the adult brain is still poorly known. Since metabolic changes are reported to be a key player in the manifestation of depressive disorder, we investigated whether there are differences in selected metabolic markers in the frontal cortex and hippocampus of Wistar Kyoto rats (WKY; an animal model of depression) compared to those of control Wistar rats and whether the induction of hypothyroidism by propylthiouracil (PTU) elicits similar effects in these animals or intensifies some parameters in the WKY rats. In our study, we used WKY rats as a model of depression since this strain exhibits lower levels of monoamines in the brain than control rats and exhibits behavioral and hormonal alterations resembling those of depression, including increased reactivity to stress. The findings indicate a decrease in glycolysis intensity in both brain structures in the WKY rats as well as in both strains under hypothyroidism conditions. Furthermore, hypothyroidism disrupted the connection between glycolysis and the Krebs cycle in the frontal cortex and hippocampus in the depression model used in this study. Decreased thyroid hormone action was also shown to attenuate oxidative phosphorylation, and this change was greater in the WKY rats. Our results suggest that both the depression and hypothyroidism models are characterized by similar impairments in brain energy metabolism and mitochondrial function and, additionally, that the co-occurrence of hypothyroidism and depression may exacerbate some of the metabolic changes observed in depression.
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Affiliation(s)
- Katarzyna Głombik
- Laboratory of Immunoendocrinology, Department of Experimental Neuroendocrinology, Maj Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland
| | - Jan Detka
- Laboratory of Immunoendocrinology, Department of Experimental Neuroendocrinology, Maj Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland
| | - Anna Kurek
- Laboratory of Immunoendocrinology, Department of Experimental Neuroendocrinology, Maj Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland
| | - Bogusława Budziszewska
- Laboratory of Immunoendocrinology, Department of Experimental Neuroendocrinology, Maj Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland
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Lang X, Hou X, Shangguan F, Zhang XY. Prevalence and clinical correlates of subclinical hypothyroidism in first-episode drug-naive patients with major depressive disorder in a large sample of Chinese. J Affect Disord 2020; 263:507-515. [PMID: 31759671 DOI: 10.1016/j.jad.2019.11.004] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 10/14/2019] [Accepted: 11/02/2019] [Indexed: 01/07/2023]
Abstract
BACKGROUND The coexistence of subclinical hypothyroidism (SCH) and depression has been intensively examined in the patients receiving thyroxine or antidepressant treatment. This study aimed to investigate the prevalence and clinical correlates of severe SCH in Chinese first-episode drug naïve patients with major depressive disorder (MDD). METHODS Using a cross-sectional design, we recruited a total of 1706 MDD patients. Depressive symptoms were evaluated using the 17-item Hamilton Depression Rating Scale (HAMD). Severity of anxiety and psychiatric symptoms were evaluated by the Hamilton Anxiety Rating Scale (HAMA) and the Positive and Negative Syndrome Scale (PANSS), respectively. Serum thyroid function parameters were measured by a chemiluminescence immunoassay. Based on the serum thyroid stimulating hormone (TSH) level, SCH was further divided into mild (TSH < 10 mIU/L) and severe SCH (TSH ≥ 10 mIU/L). RESULTS More patients with severe SCH had severe anxiety, psychotic symptoms, suicide attempts (all p < 0.001), compared with those without severe SCH. Logistic regression showed that suicide attempts and psychiatric symptoms were associated with severe SCH (both p < 0.001). Multiple linear regression showed that age (p < 0.05), BMI (p < 0.001), HAMD score (p < 0.001), HAMA score (p < 0.001), PANSS positive subscore (p = 0.001) and CGI score (p = 0.001) were associated with TSH levels. CONCLUSION Our findings suggest that suicide attempts and psychiatric symptoms may be associated with severe SCH. Moreover, severe anxiety, depressive and psychotic symptoms, as well as older age and higher BMI are possibly related to elevated TSH levels.
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Affiliation(s)
- XiaoE Lang
- Department of Psychiatry, The First Clinical Medical College, Shanxi Medical University, Taiyuan, Shanxi Province, China
| | - Xin Hou
- Department of Psychiatry, The First Clinical Medical College, Shanxi Medical University, Taiyuan, Shanxi Province, China
| | - Fangfang Shangguan
- Beijing Key Laboratory of Learning and Cognition, School of Psychology, Capital Normal University, Beijing, China.
| | - Xiang Yang Zhang
- CAS Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, China; Department of Psychology, University of Chinese Academy of Sciences, Beijing, China.
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Long-term treatment with supraphysiologic doses of levothyroxine in treatment-refractory mood disorders - A prospective study of cardiovascular tolerability. J Affect Disord 2018; 238:213-217. [PMID: 29886201 DOI: 10.1016/j.jad.2018.05.034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 04/24/2018] [Accepted: 05/25/2018] [Indexed: 01/09/2023]
Abstract
BACKGROUND To investigate long-term effects of adjunctive prophylactic treatment with supraphysiologic doses of levothyroxine (L-T4) on cardiovascular tolerability in 23 patients with treatment-refractory mood disorders. METHODS Starting point for a comprehensive cardiovascular assessment in patients was the indication for long-term maintenance treatment with L-T4 (mean dose 463 mcg/day). Prospective longitudinal assessment of the cardiovascular risk profile included in addition to a physical examination and blood pressure measurement, several technical investigations: resting electrocardiogram, transthoracic echocardiogram, cardiac stress test, and holter electrocardiogram. Statistical analysis was performed by linear mixed effects models (LMM) for evaluation of longitudinal changes in various heart measures. RESULTS During the mean observational period of 20.4 months none of the heart measures reached statistical significance in change over time. None of the assessed cardiac parameters of each single patient was in a range predictive for cardiac dysfunction. LIMITATIONS Small sample size, no technical cardiac investigations prior to L-T4 initiation, no patient control group with mood disorders who did not receive L-T4. CONCLUSIONS Results of this study indicated no increased risk for cardiovascular disorders during treatment with supraphysiologic L-T4 doses in patients with refractory mood disorders.
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Hope SF, Kennamer RA, Moore IT, Hopkins WA. Incubation temperature influences the behavioral traits of a young precocial bird. JOURNAL OF EXPERIMENTAL ZOOLOGY PART 2018; 329:191-202. [PMID: 29806120 DOI: 10.1002/jez.2176] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 04/28/2018] [Accepted: 05/01/2018] [Indexed: 12/20/2022]
Abstract
The environment in which animals develop can have important consequences for their phenotype. In reptiles, incubation temperature is a critical aspect of the early developmental environment. Incubation temperature influences morphology, physiology, and behavior of non-avian reptiles, however, little is known about how incubation temperature influences offspring phenotype and behaviors important to avian survival. To investigate whether incubation temperature influences avian behaviors, we collected wood duck (Aix sponsa) eggs from the field and incubated them at three naturally occurring incubation temperatures (35.0, 35.8, and 37.0°C). We conducted multiple repeated behavioral trials on individual ducklings between 5 and 15 days post-hatch to assess activity, exploratory, and boldness behaviors, classified along a proactive-reactive continuum. We measured growth rates and circulating levels of baseline and stress-induced corticosterone levels to investigate possible physiological correlates of behavior. Ducklings incubated at the lowest temperature displayed more proactive behaviors than those incubated at the two higher temperatures. We also found that younger ducklings exhibited more proactive behavior than older ducklings and males exhibited more proactive behavior than females. Further, duckling behaviors were repeatable across time and contexts, indicative of a proactive-reactive continuum of behavioral tendencies. However, neither corticosterone levels nor growth rates were related to behavior. This provides some of the first evidence that incubation temperature, a critical parental effect, influences avian offspring behaviors that may be important for survival. Our results identify incubation temperature as a mechanism that contributes to the development of behavioral traits and, in part, explains how multiple behavioral types may be maintained within populations.
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Affiliation(s)
- Sydney F Hope
- Department of Fish and Wildlife Conservation, Virginia Tech, Blacksburg, Virginia
| | - Robert A Kennamer
- Savannah River Ecology Laboratory, University of Georgia, Aiken, South Carolina
| | - Ignacio T Moore
- Department of Biological Sciences, Virginia Tech, Blacksburg, Virginia
| | - William A Hopkins
- Department of Fish and Wildlife Conservation, Virginia Tech, Blacksburg, Virginia
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Fanibunda SE, Desouza LA, Kapoor R, Vaidya RA, Vaidya VA. Thyroid Hormone Regulation of Adult Neurogenesis. VITAMINS AND HORMONES 2018; 106:211-251. [DOI: 10.1016/bs.vh.2017.04.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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8
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Wirth EK, Meyer F. Neuronal effects of thyroid hormone metabolites. Mol Cell Endocrinol 2017; 458:136-142. [PMID: 28088465 DOI: 10.1016/j.mce.2017.01.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 01/06/2017] [Accepted: 01/07/2017] [Indexed: 12/19/2022]
Abstract
Thyroid hormones and their metabolites are active regulators of gene expression, mitochondrial function and various other physiological actions in different organs and tissues. These actions are mediated by a spatio-temporal regulation of thyroid hormones and metabolites within a target cell. This spatio-temporal resolution as well as classical and non-classical actions of thyroid hormones and metabolites is accomplished and regulated on multiple levels as uptake, local activation and signaling of thyroid hormones. In this review, we will give an overview of the systems involved in regulating the presence and activity of thyroid hormones and their metabolites within the brain, specifically in neurons. While a wealth of data on thyroxin (T4) and 3,5,3'-triiodothyronine (T3) in the brain has been generated, research into the presence of action of other thyroid hormone metabolites is still sparse and requires further investigations.
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Affiliation(s)
- Eva K Wirth
- Institut für Experimentelle Endokrinologie, Charité-Universitätsmedizin Berlin, Berlin, Germany.
| | - Franziska Meyer
- Institut für Experimentelle Endokrinologie, Charité-Universitätsmedizin Berlin, Berlin, Germany
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9
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Flamant F, Gauthier K, Richard S. Genetic Investigation of Thyroid Hormone Receptor Function in the Developing and Adult Brain. Curr Top Dev Biol 2017; 125:303-335. [PMID: 28527576 DOI: 10.1016/bs.ctdb.2017.01.001] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Thyroid hormones exert a broad influence on brain development and function, which has been extensively studied over the years. Mouse genetics has brought an important contribution, allowing precise analysis of the interplay between TRα1 and TRβ1 nuclear receptors in neural cells. However, the exact contribution of each receptor, the possible intervention of nongenomic signaling, and the nature of the genetic program that is controlled by the receptors remain poorly understood.
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Affiliation(s)
- Frédéric Flamant
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Lyon 1, CNRS UMR 5242, INRA USC 1370, Ecole Normale Supérieure de Lyon, Lyon cedex, France.
| | - Karine Gauthier
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Lyon 1, CNRS UMR 5242, INRA USC 1370, Ecole Normale Supérieure de Lyon, Lyon cedex, France
| | - Sabine Richard
- Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Université Lyon 1, CNRS UMR 5242, INRA USC 1370, Ecole Normale Supérieure de Lyon, Lyon cedex, France
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10
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Richard S, Aguilera N, Thévenet M, Dkhissi-Benyahya O, Flamant F. Neuronal expression of a thyroid hormone receptor α mutation alters mouse behaviour. Behav Brain Res 2016; 321:18-27. [PMID: 28011173 DOI: 10.1016/j.bbr.2016.12.025] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 12/14/2016] [Accepted: 12/19/2016] [Indexed: 02/06/2023]
Abstract
In humans, alterations in thyroid hormone signalling are associated with mood and anxiety disorders, but the neural mechanisms underlying such association are poorly understood. The present study investigates the involvement of neuronal thyroid hormone receptor α (TRα) in anxiety, using mouse genetics and Cre/loxP technology to specifically alter TRα signalling in neurons. We evaluated the behaviour of mice expressing a dominant negative, neuron-specific mutation of TRα (TRαAMI/Cre3 mice), using the elevated-plus maze, light-dark box and open-field tests. In a first experiment, mice were housed individually, and the behaviour of TRαAMI/Cre3 mice differed significantly from that of control littermates in these 3 tests, suggesting heightened anxiety. In a second experiment, designed to evaluate the robustness of the results with the same 3 tests, mice were housed in groups. In these conditions, the behaviour of TRαAMI/Cre3 mice differed from that of control littermates only in the light-dark box. Thus, TRαAMI/Cre3 mice appear to be more likely to develop anxiety under stressful housing conditions than control mice. These results suggest that in adult mice, thyroid hormone signalling in neurons, via TRα, is involved in the control of anxiety behaviour.
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Affiliation(s)
- S Richard
- IGFL, INRA, Univ. Lyon 1, CNRS, ENS Lyon, 69 007 France.
| | - N Aguilera
- PBES, SFR Biosciences, INSERM, CNRS UMS3444, Univ. Lyon 1, ENS Lyon, France
| | | | - O Dkhissi-Benyahya
- INSERM U846, Stem-cell and Brain Research Institute, Department of Chronobiology, University of Lyon 1, 69003 Lyon, France.
| | - F Flamant
- IGFL, INRA, Univ. Lyon 1, CNRS, ENS Lyon, 69 007 France.
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11
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Zavareh AT, Jomhouri R, Bejestani HS, Arshad M, Daneshmand M, Ziaei H, Babadi N, Amiri M. Depression and Hypothyroidism in a Population-Based Study of Iranian Women. ROMANIAN JOURNAL OF INTERNAL MEDICINE 2016; 54:217-221. [DOI: 10.1515/rjim-2016-0033] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Indexed: 11/15/2022] Open
Abstract
Abstract
Background. Recent biochemical and physiological investigations have focused on the fundament of mood disorders in thyroid dysfunction. The present study aimed to address depressive disorder in a sample of Iranian hypothyroid women compared to euthyroid individuals.
Methods. Thirty consecutive hypothyroid female patients aged 25 to 40 years who referred to the Endocrinology and Metabolism Clinic at Rasoul-e-Akram Hospital in Tehran within a four-month period in 2015 were assessed. Thirty healthy euthyroid subjects matched for sex, age, and educational level were selected as the control. For assessment of depression status, Depression Anxiety Stress Scale-21 (DASS-21) was employed.
Results. The study showed higher mean depression score in hypothyroid patients when compared to euthyroid ones (13.8 ± 9.5 versus 5.8 ± 5.2, p = 0.010). No significant association was revealed between mean depression score and patients’ education level (p = 0.627), age (p = 0.967), occupation status (p = 0.211), and marital status (p = 0.556).
Conclusion. Hypothyroid women are predisposed to depressive symptoms independent of their baseline demographic and socioeconomic characteristics.
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Affiliation(s)
- Abbas Tavalaei Zavareh
- Department of Psychiatry, Baghiatallah Medical University, Tehran, Iran (Islamic Republic of)
| | - Rohollah Jomhouri
- Department of Internal Medicine, Rasoul-e-Akram Hospital, Iran University of Medical Science, Tehran, Iran (Islamic Republic of)
| | - Hadi Shahrad Bejestani
- Department of Endocrinology, Rasoul-e-Akram Hospital, Iran University of Medical Science, Tehran, Iran (Islamic Republic of)
| | - Mahmoud Arshad
- Department of Endocrinology, Rasoul-e-Akram Hospital, Iran University of Medical Science, Tehran, Iran (Islamic Republic of)
| | | | - Hossein Ziaei
- Department of Internal Medicine, Rasoul-e-Akram Hospital, Iran University of Medical Science, Tehran, Iran (Islamic Republic of)
| | - Neda Babadi
- Department of Internal Medicine, Rasoul-e-Akram Hospital, Iran University of Medical Science, Tehran, Iran (Islamic Republic of)
| | - Marzieh Amiri
- Khomein Research and Science Branch, Islamic Azad University of Khnomein, Arak, Iran (Islamic Republic of)
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da Conceição RR, Laureano-Melo R, Oliveira KC, de Carvalho Melo MC, Kasamatsu TS, de Barros Maciel RM, de Souza JS, Giannocco G. Antidepressant behavior in thyroidectomized Wistar rats is induced by hippocampal hypothyroidism. Physiol Behav 2016; 157:158-64. [PMID: 26861177 DOI: 10.1016/j.physbeh.2016.02.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 12/18/2015] [Accepted: 02/03/2016] [Indexed: 01/10/2023]
Abstract
Thyroidectomy is a surgical procedure indicated in cases of several maligned or benign thyroid diseases, thus, the aim of our study was to verify how the hypothyroidism induced by thyroidectomy influences behavioral parameters and its relation to thyroid hormones metabolism and neurogenesis at hippocampus. For this purpose, Adult male Wistar rats underwent to thyroidectomy to induce hypothyroidism. Behavioral tests, the thyroid profile and hippocampal gene expression were evaluated in control and in thyroidectomized animals. It was observed that thyroidectomized group had a significant increasing in serum thyroid-stimulating hormone (TSH) and a decreasing in thyroxine (T4) levels as well as in triiodothyronine (T3) serum level. It was also observed reduction of the monocarboxylate transporter 8 (Mct8), thyroid hormone receptor alfa (Trα1), deiodinase type 2 (Dio2), ectonucleotide pyrophosphatase/phosphodiesterase 2 (Enpp2) and brain-derived neurotrophic factor (Bdnf) mRNA expression in hippocampus of thyroidectomized animals. In the forced swimming test, it was verified that thyroidectomy promotes a decrease in time of immobility and climbing when compared with the control group. In summary, we demonstrated that antidepressant behavior in thyroidectomized Wistar rats is induced by hippocampal hypothyroidism. This effect could be associated to an impaired neuronal activity in acute stress response as it is observed in forced swimming paradigm.
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Affiliation(s)
- Rodrigo Rodrigues da Conceição
- Laboratório de Endocrinologia Molecular e Translacional, Departamento de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Roberto Laureano-Melo
- Departamento de Tecnologia de Alimentos, Instituto de Tecnologia, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ, Brazil
| | - Kelen Carneiro Oliveira
- Laboratório de Endocrinologia Molecular e Translacional, Departamento de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Maria Clara de Carvalho Melo
- Laboratório de Endocrinologia Molecular e Translacional, Departamento de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Tereza Sayoko Kasamatsu
- Laboratório de Endocrinologia Molecular e Translacional, Departamento de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Rui Monteiro de Barros Maciel
- Laboratório de Endocrinologia Molecular e Translacional, Departamento de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Janaina Sena de Souza
- Laboratório de Endocrinologia Molecular e Translacional, Departamento de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Gisele Giannocco
- Laboratório de Endocrinologia Molecular e Translacional, Departamento de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil; Departamento de Ciências Biológicas, Universidade Federal de São Paulo, Diadema, SP, Brazil.
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Levothyroxine effects on depressive symptoms and limbic glucose metabolism in bipolar disorder: a randomized, placebo-controlled positron emission tomography study. Mol Psychiatry 2016; 21:229-36. [PMID: 25600111 PMCID: PMC4790155 DOI: 10.1038/mp.2014.186] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 10/30/2014] [Accepted: 11/24/2014] [Indexed: 02/07/2023]
Abstract
Adding supraphysiologic doses of levothyroxine (L-T4) to standard treatment for bipolar depression shows promise, but the mechanisms underlying clinical improvement are unknown. In a previous pilot study, L-T4 treatment reduced depression scores and activity within the anterior limbic network. Here we extended this work in a randomized, double-blind, placebo-controlled study of patients with bipolar depression. Cerebral glucose metabolism was assessed with positron emission tomography and [F-18]fluorodeoxyglucose before and after 6 weeks of treatment with L-T4 (n=15) or placebo (n=10) in 12 volumes of interest (VOIs): the bilateral thalamus, amygdala, hippocampus, dorsal striatum and ventral striatum, and midline cerebellar vermis and subgenual cingulate cortex. Radioactivity in the VOIs, normalized to whole-brain radioactivity was taken as a surrogate index of glucose metabolism, and markers of thyroid function were assayed. Changes in brain activity and their association with clinical response were assessed using statistical parametric mapping. Adjunctive L-T4 treatment produced a significant decline in depression scores during the 6-week treatment. In patients treated with L-T4, we found a significant decrease in regional activity at P<0.05 after Bonferroni correction in the left thalamus, right amygdala, right hippocampus, left ventral striatum and the right dorsal striatum. Decreases in the left thalamus, left dorsal striatum and the subgenual cingulate were correlated with a reduction in depression scores (P<0.05 after Bonferroni correction). Placebo treatment was associated with a significant decrease in activity only in the right amygdala, and no region had a change in activity that was correlated with change in depression scores. The groups differed significantly in the relationship between the changes in depression scores and in activity in the thalamus bilaterally and the left ventral striatum. The findings provide evidence that administration of supraphysiologic thyroid hormone improves depressive symptoms in patients with bipolar disorder by modulating function in components of the anterior limbic network.
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TRα receptor mutations extend the spectrum of syndromes of reduced sensitivity to thyroid hormone. Presse Med 2015; 44:1103-12. [PMID: 26585273 DOI: 10.1016/j.lpm.2015.07.022] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 07/31/2015] [Indexed: 11/23/2022] Open
Abstract
Since 2012, eight different abnormalities have been described in the THRA gene (encoding the TRα1 thyroid hormone receptor) of 14 patients from 9 families. These mutations induce a clinical phenotype (resistance to thyroid hormone type α) associating symptoms of untreated mild congenital hypothyroidism and a near-normal range of free and total thyroid hormones and TSH (the T4/T3 ratio is nevertheless usually low). The phenotype can diversely include short stature (due to growth retardation), dysmorphic syndrome (face and limb extremities), psychoneuromotor disorders, constipation and bradycardia. The identified genetic abnormalities are located within the ligand-binding domain and result in defective T3 binding, an abnormally strong interaction with corepressors and a dominant negative activity against still functional receptors. The identification of patients with consistent phenotypes and the underlying mutations are warranted to better delineate the spectrum of the syndromes of reduced sensitivity to thyroid hormone.
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Wilsterman K, Buck CL, Barnes BM, Williams CT. Energy regulation in context: Free-living female arctic ground squirrels modulate the relationship between thyroid hormones and activity among life history stages. Horm Behav 2015; 75:111-9. [PMID: 26416501 DOI: 10.1016/j.yhbeh.2015.09.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2015] [Revised: 09/13/2015] [Accepted: 09/22/2015] [Indexed: 11/16/2022]
Abstract
Thyroid hormones (THs), key regulators of lipid and carbohydrate metabolism, are likely modulators of energy allocation within and among animal life history stages. Despite their role in modulating metabolism, few studies have investigated whether THs vary among life history stages in free-living animals or if they exhibit stage-specific relationships to total energy expenditure and activity levels. We measured plasma total triiodothyronine (tT3) and thyroxine (tT4) at four, discrete life history stages of female arctic ground squirrels from two different populations in northern Alaska to test whether plasma THs correlate with life history stage-specific changes in metabolic rate and energy demand. We also tested whether THs explained individual variation in aboveground activity levels within life history stages. T3 peaked during lactation and was lowest during pre-hibernation fattening, consistent with known changes in basal metabolism and core body temperature. In contrast, T4 was elevated shortly after terminating hibernation but remained low and stable across other life-history stages in the active season. THs were consistently higher in the population that spent more time above-ground but the relationship between THs and activity varied among life history stages. T3 was positively correlated with activity only during lactation (r(2)=0.50) whereas T4 was positively correlated with activity immediately following lactation (r(2)=0.48) and during fattening (r(2)=0.53). Our results support the hypothesis that THs are an important modulator of basal metabolism but also suggest that the relationship between THs and activity varies among life history stages.
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Affiliation(s)
- Kathryn Wilsterman
- Department of Integrative Biology, University of California Berkeley, Berkeley, CA 94704, USA.
| | - C Loren Buck
- Center for Bioengineering Innovation and Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011, USA
| | - Brian M Barnes
- Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, AK 99775, USA
| | - Cory T Williams
- Center for Bioengineering Innovation and Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011, USA
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16
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Abstract
Thyroid hormones act via nuclear receptors (TRα1, TRβ1, TRβ2) with differing tissue distribution; the role of α2 protein, derived from the same gene locus as TRα1, is unclear. Resistance to thyroid hormone alpha (RTHα) is characterised by tissue-specific hypothyroidism associated with near-normal thyroid function tests. Clinical features include dysmorphic facies, skeletal dysplasia (macrocephaly, epiphyseal dysgenesis), growth retardation, constipation, dyspraxia and intellectual deficit. Biochemical abnormalities include low/low-normal T4 and high/high-normal T3 concentrations, a subnormal T4/T3 ratio, variably reduced reverse T3, raised muscle creatine kinase and mild anaemia. The disorder is mediated by heterozygous, loss-of-function, mutations involving either TRα1 alone or both TRα1 and α2, with no discernible phenotype attributable to defective α2. Whole exome sequencing and diagnostic biomarkers may enable greater ascertainment of RTHα, which is important as thyroxine therapy reverses some metabolic abnormalities and improves growth, constipation, dyspraxia and wellbeing. The genetic and phenotypic heterogeneity of RTHα and its optimal management remain to be elucidated.
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Affiliation(s)
- Carla Moran
- Metabolic Research Laboratories, Wellcome Trust-MRC Institute of Metabolic Science, University of Cambridge and National Institute for Health Research Cambridge Biomedical Research Centre, Addenbrooke's Hospital, Cambridge, CB2 0QQ, UK.
| | - Krishna Chatterjee
- Metabolic Research Laboratories, Wellcome Trust-MRC Institute of Metabolic Science, University of Cambridge and National Institute for Health Research Cambridge Biomedical Research Centre, Addenbrooke's Hospital, Cambridge, CB2 0QQ, UK.
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17
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Kapoor R, Fanibunda SE, Desouza LA, Guha SK, Vaidya VA. Perspectives on thyroid hormone action in adult neurogenesis. J Neurochem 2015; 133:599-616. [DOI: 10.1111/jnc.13093] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Revised: 02/18/2015] [Accepted: 02/24/2015] [Indexed: 12/25/2022]
Affiliation(s)
- Richa Kapoor
- Department of Biological Sciences; Tata Institute of Fundamental Research; Mumbai India
| | - Sashaina E. Fanibunda
- Department of Biological Sciences; Tata Institute of Fundamental Research; Mumbai India
| | - Lynette A. Desouza
- Department of Biological Sciences; Tata Institute of Fundamental Research; Mumbai India
| | - Suman K. Guha
- Department of Biological Sciences; Tata Institute of Fundamental Research; Mumbai India
| | - Vidita A. Vaidya
- Department of Biological Sciences; Tata Institute of Fundamental Research; Mumbai India
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18
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Silva VC, Giusti-Paiva A. Sickness behavior is delayed in hypothyroid mice. Brain Behav Immun 2015; 45:109-17. [PMID: 25524131 DOI: 10.1016/j.bbi.2014.12.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Revised: 12/09/2014] [Accepted: 12/09/2014] [Indexed: 01/23/2023] Open
Abstract
Sickness behavior is an expression of a motivational state triggered by activation of the peripheral innate immune system, whereby an organism reprioritizes its functions to fight infection. The relationship between thyroid hormone and immune cells is complex, and additional insights are needed about the involvement of the cross-talk between thyroid hormone, the central nervous system and immune function, as demonstrated by the consequences to sickness behavior. The aim of this work was to evaluate sickness behavior in hypothyroid mice. Control mice and mice treated with propylthiouracil (PTU) for 30days (0.05%; added to drinking water) received a single dose of LPS (200μg/kg; i.p.) or saline, and the behavioral response was assessed for 24h. We provide evidence that thyroid status acts a modulator for the development of depressive-like and exploratory behaviors in mice that are subjected to an immunological challenge because the PTU pretreatment delayed the LPS-induced behavioral changes observed in an open field test and in a forced swimming test. This response was observed concomitantly with a lower thermal index until 4h after the LPS administration. This result demonstrates that thyroid status modifies behavioral responses to immune challenge and suggests that thyroid hormones are essential for the manifestation of sickness behavior during endotoxemia.
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Affiliation(s)
- Vanessa Cardoso Silva
- Programa Multicêntrico de Pós-Graduação em Ciências Fisiológicas, Sociedade Brasileira de Fisiologia (SBFis), Brazil; Universidade Federal de Juiz de Fora, Campus Governador Valadares, Minas Gerais, Brazil
| | - Alexandre Giusti-Paiva
- Programa Multicêntrico de Pós-Graduação em Ciências Fisiológicas, Sociedade Brasileira de Fisiologia (SBFis), Brazil; Instituto de Ciências Biomédicas, Universidade Federal de Alfenas, Minas Gerais, Brazil.
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19
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Pilhatsch M, Schlagenhauf F, Silverman D, Berman S, London ED, Martinez D, Whybrow PC, Bauer M. Antibodies in autoimmune thyroiditis affect glucose metabolism of anterior cingulate. Brain Behav Immun 2014; 37:73-7. [PMID: 24365060 DOI: 10.1016/j.bbi.2013.12.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Revised: 12/05/2013] [Accepted: 12/16/2013] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Hypothyroidism induced by an autoimmune process is associated with neuropsychiatric symptoms and metabolic abnormalities in the brain. The aim of this study was to examine the relationship between autoimmune thyroiditis and regional brain function in hypothyroid patients. METHODS Cerebral glucose metabolism, as an index of brain function, was assessed in regional whole-brain analyses using positron emission tomography (PET) and [18F]fluorodeoxyglucose in thirteen hypothyroid patients with autoimmune thyroiditis suffering from neuropsychiatric symptoms. The primary biological measures were radioactivity in pre-selected brain regions, relative to whole-brain radioactivity, as a surrogate index of glucose metabolism, and serum levels of thyroglobulin (TG) and thyroid peroxidase (TPO) antibodies as endocrine markers of autoimmune thyroiditis. RESULTS Serum levels of anti-TG antibodies in hypothyroid patients were significantly correlated with glucose metabolism in the perigenual anterior cingulate cortex, a brain region previously shown to regulate affect and emotional homeostasis. CONCLUSION Thyroid autoimmune processes may play an important role in the still poorly defined pathogenic correlates of disturbed function in brain regions critically involved in emotional processing in hypothyroid conditions.
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Affiliation(s)
- M Pilhatsch
- Department of Psychiatry and Psychotherapy, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - F Schlagenhauf
- Department of Psychiatry and Psychotherapy, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - D Silverman
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
| | - S Berman
- Semel Institute for Neuroscience and Human Behavior, Department of Psychiatry and Biobehavioral Sciences, University of California Los Angeles, Los Angeles, CA, USA
| | - E D London
- Department of Molecular and Medical Pharmacology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA; Semel Institute for Neuroscience and Human Behavior, Department of Psychiatry and Biobehavioral Sciences, University of California Los Angeles, Los Angeles, CA, USA
| | - D Martinez
- Department of Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
| | - P C Whybrow
- Semel Institute for Neuroscience and Human Behavior, Department of Psychiatry and Biobehavioral Sciences, University of California Los Angeles, Los Angeles, CA, USA
| | - M Bauer
- Department of Psychiatry and Psychotherapy, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.
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20
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Bianco AC, Anderson G, Forrest D, Galton VA, Gereben B, Kim BW, Kopp PA, Liao XH, Obregon MJ, Peeters RP, Refetoff S, Sharlin DS, Simonides WS, Weiss RE, Williams GR. American Thyroid Association Guide to investigating thyroid hormone economy and action in rodent and cell models. Thyroid 2014; 24:88-168. [PMID: 24001133 PMCID: PMC3887458 DOI: 10.1089/thy.2013.0109] [Citation(s) in RCA: 135] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND An in-depth understanding of the fundamental principles that regulate thyroid hormone homeostasis is critical for the development of new diagnostic and treatment approaches for patients with thyroid disease. SUMMARY Important clinical practices in use today for the treatment of patients with hypothyroidism, hyperthyroidism, or thyroid cancer are the result of laboratory discoveries made by scientists investigating the most basic aspects of thyroid structure and molecular biology. In this document, a panel of experts commissioned by the American Thyroid Association makes a series of recommendations related to the study of thyroid hormone economy and action. These recommendations are intended to promote standardization of study design, which should in turn increase the comparability and reproducibility of experimental findings. CONCLUSIONS It is expected that adherence to these recommendations by investigators in the field will facilitate progress towards a better understanding of the thyroid gland and thyroid hormone dependent processes.
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Affiliation(s)
- Antonio C. Bianco
- Division of Endocrinology, Diabetes and Metabolism, University of Miami Miller School of Medicine, Miami, Florida
| | - Grant Anderson
- Department of Pharmacy Practice and Pharmaceutical Sciences, College of Pharmacy, University of Minnesota Duluth, Duluth, Minnesota
| | - Douglas Forrest
- Laboratory of Endocrinology and Receptor Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland
| | - Valerie Anne Galton
- Department of Physiology and Neurobiology, Dartmouth Medical School, Lebanon, New Hampshire
| | - Balázs Gereben
- Department of Endocrine Neurobiology, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary
| | - Brian W. Kim
- Division of Endocrinology, Diabetes and Metabolism, University of Miami Miller School of Medicine, Miami, Florida
| | - Peter A. Kopp
- Division of Endocrinology, Metabolism, and Molecular Medicine, and Center for Genetic Medicine, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Xiao Hui Liao
- Section of Adult and Pediatric Endocrinology, Diabetes, and Metabolism, The University of Chicago, Chicago, Illinois
| | - Maria Jesus Obregon
- Institute of Biomedical Investigation (IIB), Spanish National Research Council (CSIC) and Autonomous University of Madrid, Madrid, Spain
| | - Robin P. Peeters
- Division of Endocrinology, Department of Internal Medicine, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Samuel Refetoff
- Section of Adult and Pediatric Endocrinology, Diabetes, and Metabolism, The University of Chicago, Chicago, Illinois
| | - David S. Sharlin
- Department of Biological Sciences, Minnesota State University, Mankato, Minnesota
| | - Warner S. Simonides
- Laboratory for Physiology, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, The Netherlands
| | - Roy E. Weiss
- Section of Adult and Pediatric Endocrinology, Diabetes, and Metabolism, The University of Chicago, Chicago, Illinois
| | - Graham R. Williams
- Department of Medicine, Imperial College London, Hammersmith Campus, London, United Kingdom
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21
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Fraga MC, de Moura EG, da Silva Lima N, Lisboa PC, de Oliveira E, Silva JO, Claudio-Neto S, Filgueiras CC, Abreu-Villaça Y, Manhães AC. Anxiety-like, novelty-seeking and memory/learning behavioral traits in male Wistar rats submitted to early weaning. Physiol Behav 2014; 124:100-6. [DOI: 10.1016/j.physbeh.2013.11.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Revised: 10/25/2013] [Accepted: 11/06/2013] [Indexed: 10/26/2022]
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22
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El-Hage W, Leman S, Camus V, Belzung C. Mechanisms of antidepressant resistance. Front Pharmacol 2013; 4:146. [PMID: 24319431 PMCID: PMC3837246 DOI: 10.3389/fphar.2013.00146] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Accepted: 11/05/2013] [Indexed: 12/28/2022] Open
Abstract
Depression is one of the most frequent and severe mental disorder. Since the discovery of antidepressant (AD) properties of the imipramine and then after of other tricyclic compounds, several classes of psychotropic drugs have shown be effective in treating major depressive disorder (MDD). However, there is a wide range of variability in response to ADs that might lead to non response or partial response or in increased rate of relapse or recurrence. The mechanisms of response to AD therapy are poorly understood, and few biomarkers are available than can predict response to pharmacotherapy. Here, we will first review markers that can be used to predict response to pharmacotherapy, such as markers of drug metabolism or blood-brain barrier (BBB) function, the activity of specific brain areas or neurotransmitter systems, hormonal dysregulations or plasticity, and related molecular targets. We will describe both clinical and preclinical studies and describe factors that might affect the expression of these markers, including environmental or genetic factors and comorbidities. This information will permit us to suggest practical recommendations and innovative treatment strategies to improve therapeutic outcomes.
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Affiliation(s)
- Wissam El-Hage
- INSERM 930, Faculté de Sciences et Techniques, Université François Rabelais Tours, France ; Centre Hospitalier Régional Universitaire de Tours, Centre Expert Dépression Résistante, Fondation FondaMental Tours, France
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23
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Vasudevan N, Morgan M, Pfaff D, Ogawa S. Distinct behavioral phenotypes in male mice lacking the thyroid hormone receptor α1 or β isoforms. Horm Behav 2013; 63:742-51. [PMID: 23567476 PMCID: PMC3726275 DOI: 10.1016/j.yhbeh.2013.03.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Revised: 03/22/2013] [Accepted: 03/28/2013] [Indexed: 11/29/2022]
Abstract
Thyroid hormones influence both neuronal development and anxiety via the thyroid hormone receptors (TRs). The TRs are encoded by two different genes, TRα and TRβ. The loss of TRα1 is implicated in increased anxiety in males, possibly via a hippocampal increase in GABAergic activity. We compared both social behaviors and two underlying and related non-social behaviors, state anxiety and responses to acoustic and tactile startle in the gonadally intact TRα1 knockout (α1KO) and TRβ (βKO) male mice to their wild-type counterparts. For the first time, we show an opposing effect of the two TR isoforms, TRα1 and TRβ, in the regulation of state anxiety, with α1 knockout animals (α1KO) showing higher levels of anxiety and βKO males showing less anxiety compared to respective wild-type mice. At odds with the increased anxiety in non-social environments, α1KO males also show lower levels of responsiveness to acoustic and tactile startle stimuli. Consistent with the data that T4 is inhibitory to lordosis in female mice, we show subtly increased sex behavior in α1KO male mice. These behaviors support the idea that TRα1 could be inhibitory to ERα driven transcription that ultimately impacts ERα driven behaviors such as lordosis. The behavioral phenotypes point to novel roles for the TRs, particularly in non-social behaviors such as state anxiety and startle.
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Affiliation(s)
- Nandini Vasudevan
- Cell and Molecular Biology Department, Tulane University, New Orleans, LA 70118, USA.
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24
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Careau V, Garland T. Performance, personality, and energetics: correlation, causation, and mechanism. Physiol Biochem Zool 2012; 85:543-71. [PMID: 23099454 DOI: 10.1086/666970] [Citation(s) in RCA: 307] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The study of phenotypic evolution should be an integrative endeavor that combines different approaches and crosses disciplinary and phylogenetic boundaries to consider complex traits and organisms that historically have been studied in isolation from each other. Analyses of individual variation within populations can act to bridge studies focused at the levels of morphology, physiology, biochemistry, organismal performance, behavior, and life history. For example, the study of individual variation recently facilitated the integration of behavior into the concept of a pace-of-life syndrome and effectively linked the field of energetics with research on animal personality. Here, we illustrate how studies on the pace-of-life syndrome and the energetics of personality can be integrated within a physiology-performance-behavior-fitness paradigm that includes consideration of ecological context. We first introduce key concepts and definitions and then review the rapidly expanding literature on the links between energy metabolism and personality traits commonly studied in nonhuman animals (activity, exploration, boldness, aggressiveness, sociability). We highlight some empirical literature involving mammals and squamates that demonstrates how emerging fields can develop in rather disparate ways because of historical accidents and/or particularities of different kinds of organisms. We then briefly discuss potentially interesting avenues for future conceptual and empirical research in relation to motivation, intraindividual variation, and mechanisms underlying trait correlations. The integration of performance traits within the pace-of-life-syndrome concept has the potential to fill a logical gap between the context dependency of selection and how energetics and personality are expected to interrelate. Studies of how performance abilities and/or aspects of Darwinian fitness relate to both metabolic rate and personality traits are particularly lacking.
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Affiliation(s)
- Vincent Careau
- Department of Biology, University of California, Riverside, California 92521, USA.
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25
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López-Juárez A, Remaud S, Hassani Z, Jolivet P, Pierre Simons J, Sontag T, Yoshikawa K, Price J, Morvan-Dubois G, Demeneix BA. Thyroid hormone signaling acts as a neurogenic switch by repressing Sox2 in the adult neural stem cell niche. Cell Stem Cell 2012; 10:531-43. [PMID: 22560077 DOI: 10.1016/j.stem.2012.04.008] [Citation(s) in RCA: 101] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2010] [Revised: 01/12/2012] [Accepted: 04/09/2012] [Indexed: 02/02/2023]
Abstract
The subventricular zone (SVZ) neural stem cell niche contains mixed populations of stem cells, transit-amplifying cells, and migrating neuroblasts. Deciphering how endogenous signals, such as hormones, affect the balance between these cell types is essential for understanding the physiology of niche plasticity and homeostasis. We show that Thyroid Hormone (T(3)) and its receptor, TRα1, are directly involved in maintaining this balance. TRα1 is expressed in amplifying and migrating cells. In vivo gain- and loss-of-function experiments demonstrate first, that T(3)/TRα1 directly repress Sox2 expression, and second, that TRα1 overexpression in the niche favors the appearance of DCX+ migrating neuroblasts. Lack of TRα increases numbers of SOX2+ cells in the SVZ. Hypothyroidism increases proportions of cells in interphase. Thus, in the adult SVZ, T(3)/TRα1 together favor neural stem cell commitment and progression toward a migrating neuroblast phenotype; this transition correlates with T(3)/TRα1-dependent transcriptional repression of Sox2.
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Affiliation(s)
- Alejandra López-Juárez
- UMR CNRS 7221, Evolution des Régulations Endocriniennes, Département Régulations, Développement et Diversité Moléculaire, Muséum National d'Histoire Naturelle, 75231 Paris, France
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26
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Abstract
Our understanding of thyroid hormone action has been substantially altered by recent clinical observations of thyroid signaling defects in syndromes of hormone resistance and in a broad range of conditions, including profound mental retardation, obesity, metabolic disorders, and a number of cancers. The mechanism of thyroid hormone action has been informed by these clinical observations as well as by animal models and has influenced the way we view the role of local ligand availability; tissue and cell-specific thyroid hormone transporters, corepressors, and coactivators; thyroid hormone receptor (TR) isoform-specific action; and cross-talk in metabolic regulation and neural development. In some cases, our new understanding has already been translated into therapeutic strategies, especially for treating hyperlipidemia and obesity, and other drugs are in development to treat cardiac disease and cancer and to improve cognitive function.
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Affiliation(s)
- Gregory A Brent
- Department of Medicine, VA Greater Los Angeles Healthcare System, David Geffen School of Medicine at UCLA, Los Angeles, CA 90073, USA.
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Onksen JL, Briand LA, Galante RJ, Pack AI, Blendy JA. Running-induced anxiety is dependent on increases in hippocampal neurogenesis. GENES BRAIN AND BEHAVIOR 2012; 11:529-38. [PMID: 22471438 DOI: 10.1111/j.1601-183x.2012.00788.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Exercise, specifically voluntary wheel running, is a potent stimulator of hippocampal neurogenesis in adult mice. In addition, exercise induces behavioral changes in numerous measures of anxiety in rodents. However, the physiological underpinnings of these changes are poorly understood. To investigate the role of neurogenesis in exercise-mediated anxiety, we examined the cellular and behavioral effects of voluntary wheel running in mice with a reduction in hippocampal neurogenesis, achieved through conditional deletion of ataxia telangiectasia-mutated and rad-3-related protein (ATR), a cell cycle checkpoint kinase necessary for normal levels of neurogenesis. Following hippocampal microinjection of an adeno-associated virus expressing Cre recombinase to delete ATR, mice were exposed to 4 weeks of voluntary wheel running and subsequently evaluated for anxiety-like behavior. Wheel running resulted in increased cell proliferation and neurogenesis, as measured by bromodeoxyuridine and doublecortin, respectively. Wheel running also resulted in heightened anxiety in the novelty-induced hypophagia, open field and light-dark box tests. However, both the neurogenic and anxiogenic effects of wheel running were attenuated following hippocampal ATR deletion, suggesting that increased neurogenesis is an important mediator of exercise-induced anxiety.
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Affiliation(s)
- J L Onksen
- Department of Pharmacology, University of Pennsylvania School of Medicine, Philadelphia, 19104, USA
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28
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Peruga I, Hartwig S, Merkler D, Thöne J, Hovemann B, Juckel G, Gold R, Linker RA. Endogenous ciliary neurotrophic factor modulates anxiety and depressive-like behavior. Behav Brain Res 2012; 229:325-32. [DOI: 10.1016/j.bbr.2012.01.020] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2011] [Revised: 01/05/2012] [Accepted: 01/08/2012] [Indexed: 12/28/2022]
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The Link between Thyroid Function and Depression. J Thyroid Res 2011; 2012:590648. [PMID: 22220285 PMCID: PMC3246784 DOI: 10.1155/2012/590648] [Citation(s) in RCA: 170] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2011] [Revised: 09/26/2011] [Accepted: 09/26/2011] [Indexed: 11/17/2022] Open
Abstract
The relation between thyroid function and depression has long been recognized. Patients with thyroid disorders are more prone to develop depressive symptoms and conversely depression may be accompanied by various subtle thyroid abnormalities. Traditionally, the most commonly documented abnormalities are elevated T4 levels, low T3, elevated rT3, a blunted TSH response to TRH, positive antithyroid antibodies, and elevated CSF TRH concentrations. In addition, thyroid hormone supplements appear to accelerate and enhance the clinical response to antidepressant drugs. However, the mechanisms underlying the interaction between thyroid function and depression remain to be further clarified. Recently, advances in biochemical, genetic, and neuroimaging fields have provided new insights into the thyroid-depression relationship.
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30
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Abstract
Abstract Thyroid hormones play a critical role in brain development but also in the adult human brain by modulating metabolic activity. Hypothyroid states are associated with both functional and structural brain alterations also seen in patients with major depression. Recent animal experimental and preclinical data indicate subtle changes in myelination, microvascular density, local neurogenesis, and functional networks. The translational validity of such studies is obviously limited. Clinical evidence for neurobiological correlates of different stages and severities of hypothyroidism and effects of pharmacological intervention is lacking but may be achieved using advanced imaging techniques, e.g. functional and quantitative MRI techniques applied to patients with hypothyroidism before and after hormone replacement therapy.
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31
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Fraga MC, Moura EG, Silva JO, Bonomo IT, Filgueiras CC, Abreu-Villaça Y, Passos MCF, Lisboa PC, Manhães AC. Maternal prolactin inhibition at the end of lactation affects learning/memory and anxiety-like behaviors but not novelty-seeking in adult rat progeny. Pharmacol Biochem Behav 2011; 100:165-73. [PMID: 21777608 DOI: 10.1016/j.pbb.2011.07.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2011] [Revised: 07/05/2011] [Accepted: 07/07/2011] [Indexed: 12/13/2022]
Abstract
Maternal hypoprolactinemia at the end of lactation in rats reduces milk production and is associated with offspring's malnutrition. Since malnutrition during development is also known to have long lasting effects on cognition and emotion, in the present study we tested the hypothesis that maternal hypoprolactinemia, induced by bromocriptine treatment, at the end of the lactating period affects memory/learning, novelty-seeking and anxiety-like behaviors in adult male Wistar rats using, respectively, the radial arm water maze (RAWM), the hole board (HB) arena and the elevated plus-maze (EPM). We also analyzed serum corticosterone and thyroid hormone levels at postnatal day (PN) 21. Lactating dams were treated with bromocriptine (BRO, 1mg twice a day, inhibiting prolactin) or saline from PN19 to 21 (the last 3 days of lactation). BRO offspring had hypercorticosteronemia and hypothyroidism at PN21. In the RAWM, reductions in latency observed in CON rats were initially more accentuated than in BRO ones. By the end of the testing period, latencies became similar between groups. No difference was observed between groups regarding the number of nose-pokes in the HB. In the EPM, BRO rats stayed less time in and had fewer entries into the open-arms than CON ones. This pattern of results indicates that maternal bromocriptine treatment at the end of the lactating period results in poorer memory/learning performance and in higher levels of anxiety-like behavior in the adult offspring, demonstrating that even a relatively short period of malnutrition during development can have long lasting detrimental effects regarding cognition and emotion.
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Affiliation(s)
- Mabel C Fraga
- Laboratório de Fisiologia Endócrina, Departamento de Ciências Fisiológicas, Instituto de Biologia Roberto Alcantara Gomes, Centro Biomédico, Universidade do Estado do Rio de Janeiro, Brazil
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Kraemer S, Danker-Hopfe H, Pilhatsch M, Bes F, Bauer M. Effects of supraphysiological doses of levothyroxine on sleep in healthy subjects: a prospective polysomnography study. J Thyroid Res 2011; 2011:420580. [PMID: 21765990 PMCID: PMC3134320 DOI: 10.4061/2011/420580] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2010] [Accepted: 05/13/2011] [Indexed: 11/20/2022] Open
Abstract
Disrupted sleep is prevalent in both mood and thyroid disorders. Given the emerging use of thyroid hormones in the treatment of mood disorders, we investigated the effects of supraphysiological doses of levothyroxine (L-T4) on sleep. In an open-label design, 13 healthy subjects received up to 500 μg/day for an eight-week period. A baseline night was polysomnographically recorded (PSG) followed by PSG under the maximum tolerated dose of L-T4. All subjects developed hyperthyroxinemia. The heart rate and respiration rate increased significantly with treatment; a significant increase in body temperature was observed in men but not in women. Surprisingly, treatment with supraphysiological doses of L-T4 did not cause significant effects on sleep architecture. However, the increase in body movements and REM density was close to reaching statistical significance. Here, we report on the sleep data, thyroid hormone levels, and physiological parameters during sleep. We conclude that experimentally induced hyperthyroidism does not profoundly change the sleep structure in healthy individuals underlining the good tolerability of treatment with supraphysiological doses of L-T4 in patients with mood disorders.
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Affiliation(s)
| | - Heidi Danker-Hopfe
- Department of Psychiatry and Psychotherapy, Charité—University Medicine 14050 Berlin, Campus Benjamin Franklin, Berlin, Germany
| | - Maximilian Pilhatsch
- Department of Psychiatry and Psychotherapy, University Hospital Carl Gustav Carus, Technische Universität Dresden, Fetscherstraße 74, 01307 Dresden, Germany
| | - Frederik Bes
- Embla Systems BV, 1043 Amsterdam, The Netherlands
| | - Michael Bauer
- Department of Psychiatry and Psychotherapy, University Hospital Carl Gustav Carus, Technische Universität Dresden, Fetscherstraße 74, 01307 Dresden, Germany
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Chatonnet F, Picou F, Fauquier T, Flamant F. Thyroid hormone action in cerebellum and cerebral cortex development. J Thyroid Res 2011; 2011:145762. [PMID: 21765985 PMCID: PMC3134109 DOI: 10.4061/2011/145762] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2011] [Accepted: 04/09/2011] [Indexed: 01/30/2023] Open
Abstract
Thyroid hormones (TH, including the prohormone thyroxine (T4) and its active deiodinated derivative 3,3′,5-triiodo-L-thyronine (T3)) are important regulators of vertebrates neurodevelopment. Specific transporters and deiodinases are required to ensure T3 access to the developing brain. T3 activates a number of differentiation processes in neuronal and glial cell types by binding to nuclear receptors, acting directly on transcription. Only few T3 target genes are currently known. Deeper investigations are urgently needed, considering that some chemicals present in food are believed to interfere with T3 signaling with putative neurotoxic consequences.
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Affiliation(s)
- Fabrice Chatonnet
- Institut de Génomique Fonctionnelle de Lyon, Ecole Normale Supérieure de Lyon, Université de Lyon, UMR CNRS 5242, 46 allée d'Italie, 69364 Lyon Cedex 07, France
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Kapoor R, van Hogerlinden M, Wallis K, Ghosh H, Nordstrom K, Vennstrom B, Vaidya VA. Unliganded thyroid hormone receptor alpha1 impairs adult hippocampal neurogenesis. FASEB J 2010; 24:4793-805. [PMID: 20709911 PMCID: PMC4177098 DOI: 10.1096/fj.10-161802] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Thyroid hormone regulates adult hippocampal neurogenesis, a process involved in key functions, such as learning, memory, and mood regulation. We addressed the role of thyroid hormone receptor TRα1 in adult hippocampal neurogenesis, using mice harboring a TRα1 null allele (TRα1(-/-)), overexpressing TRα1 6-fold (TRα2(-/-)), and a mutant TRα1 (TRα1(+/m)) with a 10-fold lower affinity to the ligand. While hippocampal progenitor proliferation was unaltered, TRα1(-/-) mice exhibited a significant increase in doublecortin-positive immature neurons and increased survival of bromodeoxyuridine-positive (BrdU(+)) progenitors as compared to wild-type controls. In contrast, the TRα1(+/m) and the TRα2(-/-) mice, where the overexpressed TRα1 acts as an aporeceptor, showed a significant decline in surviving BrdU(+) progenitors. TRα1(-/-) and TRα2(-/-) mice showed opposing effects on neurogenic markers like polysialylated neural cell adhesion molecule and stathmin. The decreased progenitor survival in the TRα2(-/-) and TRα1(+/m) mice could be rescued by thyroid hormone treatment, as was the decline in neuronal differentiation seen in the TRα1(+/m) mice. These mice also exhibited a decrease in NeuroD(+) cell numbers in the dentate gyrus, suggesting an effect on early postmitotic progenitors. Our results provide the first evidence of a role for unliganded TRα1 in modulating the deleterious effects of hypothyroidism on adult hippocampal neurogenesis.
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Affiliation(s)
- Richa Kapoor
- Department of Biological Sciences, Tata Institute of Fundamental Research, Mumbai 400005, India
| | - Max van Hogerlinden
- Department of Cell and Molecular Biology, Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | - Karin Wallis
- Department of Cell and Molecular Biology, Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | - Himanish Ghosh
- Department of Biological Sciences, Tata Institute of Fundamental Research, Mumbai 400005, India
| | - Kristina Nordstrom
- Department of Cell and Molecular Biology, Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | - Bjorn Vennstrom
- Department of Cell and Molecular Biology, Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | - Vidita A. Vaidya
- Department of Biological Sciences, Tata Institute of Fundamental Research, Mumbai 400005, India
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Kapoor R, Hogerlinden M, Wallis K, Ghosh H, Nordstrom K, Vennstrom B, Vaidya VA. Unliganded thyroid hormone receptor αl impairs adult hippocampal neurogenesis. FASEB J 2010. [DOI: 10.1096/fj.10.161802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Richa Kapoor
- Department of Biological SciencesTata Institute of Fundamental Research Mumbai India
| | - Max Hogerlinden
- Department of Cell and Molecular BiologyKarolinska Institutet Stockholm Sweden
| | - Karin Wallis
- Department of Cell and Molecular BiologyKarolinska Institutet Stockholm Sweden
| | - Himanish Ghosh
- Department of Biological SciencesTata Institute of Fundamental Research Mumbai India
| | - Kristina Nordstrom
- Department of Cell and Molecular BiologyKarolinska Institutet Stockholm Sweden
| | - Bjorn Vennstrom
- Department of Cell and Molecular BiologyKarolinska Institutet Stockholm Sweden
| | - Vidita A. Vaidya
- Department of Biological SciencesTata Institute of Fundamental Research Mumbai India
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