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Wu Y, Zhou H, Ci X, Lu J. Low T3 syndrome is associated with the severity of myelin oligodendrocyte glycoprotein antibody-associated disease exacerbation. Front Neurosci 2024; 18:1357633. [PMID: 38835837 PMCID: PMC11148359 DOI: 10.3389/fnins.2024.1357633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 05/07/2024] [Indexed: 06/06/2024] Open
Abstract
Background Myelin oligodendrocyte glycoprotein antibody-associated disease (MOGAD) is a rare autoimmune inflammatory disease of the central nervous system, (CNS) different from multiple sclerosis (MS) and neuromyelitis optica spectrum disorder (NMOSD). While numerous studies have delved into the involvement of thyroid antibodies (ATAbs) and thyroid function in NMOSD and MS. The objective of this study is to explore the clinical significance of thyroid dysfunction and ATAbs abnormalities in adult patients with MOGAD. Methods 36 adult inpatients diagnosed with MOGAD and 47 sex- and age-matched healthy controls were enrolled. Patients were divided into two groups based on the presence or absence of low T3 syndrome. Demographics, clinical characteristics, and results of auxiliary examinations were compared across the subgroups. Moreover, an analysis was conducted to explore the correlations between thyroid hormone levels and Expanded Disability Status Scale (EDSS) scores. Results Thyroid dysfunction was notably more frequent in MOGAD patients than healthy controls (p < 0.0001), particularly low T3 syndrome (p=0.03). Furthermore, subgroup analyses revealed that the low T3 syndrome group exhibited higher EDSS scores and a higher proportion of individuals with EDSS scores > 3, in comparison to the non-low T3 syndrome group (p = 0.014, p = 0.046). However, no significant differences were observed in demographic characteristics, annual relapse rates, clinical phenotypes, laboratory and MRI results, and EEG abnormalities between the two groups. Additional Spearman's analysis showed significantly negative correlations between the TT3 and FT3 levels with EDSS scores (r = -0.367, p = 0.028; r = -0.377, p = 0.024). Typical brain lesions and paralateral ventricle lesions were significantly rare in patients with positive ATAbs compared to those with negative ATAbs (p = 0.0001, p = 0.03), although the incidence of ATAbs abnormalities did not differ significantly between MOGAD patients and healthy controls. Conclusions Overall, this study confirmed thyroid dysfunction, especially low T3 syndrome, is frequent in adult MOGAD patients. Patients with low T3 syndrome exhibited elevated EDSS scores and a significantly higher incidence of unfavorable condition. additionally, the correlation analysis model manifests that FT3 and TT3 levels were negatively correlated with EDSS scores. These evidences indicate that low T3 syndrome is associated with the severity of MOGAD exacerbation.
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Affiliation(s)
- Yuqing Wu
- Department of Neurology, The Affiliated Brain Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Hao Zhou
- Department of Neurology, The Affiliated Brain Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Xiaojiao Ci
- Department of Neurology, The Affiliated Brain Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Jie Lu
- Department of Neurology, The Affiliated Brain Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
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2
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Mancino G, Sibilio A, Luongo C, Di Cicco E, Miro C, Cicatiello AG, Nappi A, Sagliocchi S, Ambrosio R, De Stefano MA, Di Girolamo D, Porcelli T, Murolo M, Saracino F, Perruolo G, Formisano P, Stornaiuolo M, Dentice M. The Thyroid Hormone Inactivator Enzyme, Type 3 Deiodinase, Is Essential for Coordination of Keratinocyte Growth and Differentiation. Thyroid 2020; 30:1066-1078. [PMID: 32111151 DOI: 10.1089/thy.2019.0557] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Background: Thyroid hormones (THs) are key regulators of development, tissue differentiation, and maintenance of metabolic balance in virtually every cell of the body. Accordingly, severe alteration of TH action during fetal life leads to permanent deficits in humans. The skin is among the few adult tissues expressing the oncofetal protein type 3 deiodinase (D3), the TH inactivating enzyme. Here, we demonstrate that D3 is dynamically regulated during epidermal ontogenesis. Methods: To investigate the function of D3 in a postdevelopmental context, we used a mouse model of conditional epidermal-specific D3 depletion. Loss of D3 resulted in tissue hypoplasia and enhanced epidermal differentiation in a cell-autonomous manner. Results: Accordingly, wound healing repair and hair follicle cycle were altered in the D3-depleted epidermis. Further, in vitro ablation of D3 in primary culture of keratinocytes indicated that various markers of stratified epithelial layers were upregulated, thereby confirming the pro-differentiative action of D3 depletion and the consequent increased intracellular triiodothyronine levels. Notably, loss of D3 reduced the clearance of systemic TH in vivo, thereby demonstrating the critical requirement for epidermal D3 in the maintenance of TH homeostasis. Conclusion: In conclusion, our results show that the D3 enzyme is a key TH-signaling component in the skin, thereby providing a striking example of a physiological context for deiodinase-mediated TH metabolism, as well as a rationale for therapeutic manipulation of deiodinases in pathophysiological contexts.
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Affiliation(s)
- Giuseppina Mancino
- Department of Clinical Medicine and Surgery, Research Unit (URT) Genomic of Diabetes, Institute of Experimental Endocrinology and Oncology, National Council of Research (CNR); University of Naples "Federico II," Naples, Italy
| | - Annarita Sibilio
- Department of Clinical Medicine and Surgery, Research Unit (URT) Genomic of Diabetes, Institute of Experimental Endocrinology and Oncology, National Council of Research (CNR); University of Naples "Federico II," Naples, Italy
| | - Cristina Luongo
- Department of Public Health, and Research Unit (URT) Genomic of Diabetes, Institute of Experimental Endocrinology and Oncology, National Council of Research (CNR); University of Naples "Federico II," Naples, Italy
| | - Emery Di Cicco
- Department of Clinical Medicine and Surgery, Research Unit (URT) Genomic of Diabetes, Institute of Experimental Endocrinology and Oncology, National Council of Research (CNR); University of Naples "Federico II," Naples, Italy
| | - Caterina Miro
- Department of Public Health, and Research Unit (URT) Genomic of Diabetes, Institute of Experimental Endocrinology and Oncology, National Council of Research (CNR); University of Naples "Federico II," Naples, Italy
| | - Annunziata Gaetana Cicatiello
- Department of Clinical Medicine and Surgery, Research Unit (URT) Genomic of Diabetes, Institute of Experimental Endocrinology and Oncology, National Council of Research (CNR); University of Naples "Federico II," Naples, Italy
| | - Annarita Nappi
- Department of Public Health, and Research Unit (URT) Genomic of Diabetes, Institute of Experimental Endocrinology and Oncology, National Council of Research (CNR); University of Naples "Federico II," Naples, Italy
| | - Serena Sagliocchi
- Department of Clinical Medicine and Surgery, Research Unit (URT) Genomic of Diabetes, Institute of Experimental Endocrinology and Oncology, National Council of Research (CNR); University of Naples "Federico II," Naples, Italy
| | | | - Maria Angela De Stefano
- Department of Clinical Medicine and Surgery, Research Unit (URT) Genomic of Diabetes, Institute of Experimental Endocrinology and Oncology, National Council of Research (CNR); University of Naples "Federico II," Naples, Italy
| | - Daniela Di Girolamo
- Department of Clinical Medicine and Surgery, Research Unit (URT) Genomic of Diabetes, Institute of Experimental Endocrinology and Oncology, National Council of Research (CNR); University of Naples "Federico II," Naples, Italy
| | - Tommaso Porcelli
- Department of Clinical Medicine and Surgery, Research Unit (URT) Genomic of Diabetes, Institute of Experimental Endocrinology and Oncology, National Council of Research (CNR); University of Naples "Federico II," Naples, Italy
| | - Melania Murolo
- Department of Clinical Medicine and Surgery, Research Unit (URT) Genomic of Diabetes, Institute of Experimental Endocrinology and Oncology, National Council of Research (CNR); University of Naples "Federico II," Naples, Italy
| | - Federica Saracino
- Department of Clinical Medicine and Surgery, Research Unit (URT) Genomic of Diabetes, Institute of Experimental Endocrinology and Oncology, National Council of Research (CNR); University of Naples "Federico II," Naples, Italy
| | - Giuseppe Perruolo
- Department of Department of Translational Medicine, Research Unit (URT) Genomic of Diabetes, Institute of Experimental Endocrinology and Oncology, National Council of Research (CNR); University of Naples "Federico II," Naples, Italy
| | - Pietro Formisano
- Department of Department of Translational Medicine, Research Unit (URT) Genomic of Diabetes, Institute of Experimental Endocrinology and Oncology, National Council of Research (CNR); University of Naples "Federico II," Naples, Italy
| | - Mariano Stornaiuolo
- Department of Pharmacy; Research Unit (URT) Genomic of Diabetes, Institute of Experimental Endocrinology and Oncology, National Council of Research (CNR); University of Naples "Federico II," Naples, Italy
| | - Monica Dentice
- Department of Clinical Medicine and Surgery, Research Unit (URT) Genomic of Diabetes, Institute of Experimental Endocrinology and Oncology, National Council of Research (CNR); University of Naples "Federico II," Naples, Italy
- CEINGE-Biotecnologie Avanzate Scarl, Naples, Italy
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3
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Baldassarro VA, Marchesini A, Giardino L, Calzà L. Differential effects of glucose deprivation on the survival of fetal versus adult neural stem cells-derived oligodendrocyte precursor cells. Glia 2019; 68:898-917. [PMID: 31755592 DOI: 10.1002/glia.23750] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 10/28/2019] [Accepted: 10/29/2019] [Indexed: 12/27/2022]
Abstract
Impaired myelination is a key feature in neonatal hypoxia/ischemia (HI), the most common perinatal/neonatal cause of death and permanent disabilities, which is triggered by the establishment of an inflammatory and hypoxic environment during the most critical period of myelin development. This process is dependent on oligodendrocyte precursor cells (OPCs) and their capability to differentiate into mature oligodendrocytes. In this study, we investigated the vulnerability of fetal and adult OPCs derived from neural stem cells (NSCs) to inflammatory and HI insults. The resulting OPCs/astrocytes cultures were exposed to cytokines to mimic inflammation, or to oxygen-glucose deprivation (OGD) to mimic an HI condition. The differentiation of both fetal and adult OPCs is completely abolished following exposure to inflammatory cytokines, while only fetal-derived OPCs degenerate when exposed to OGD. We then investigated possible mechanisms involved in OGD-mediated toxicity: (a) T3-mediated maturation induction; (b) glutamate excitotoxicity; (c) glucose metabolism. We found that while no substantial differences were observed in T3 intracellular content regulation and glutamate-mediated toxicity, glucose deprivation lead to selective OPC cell death and impaired differentiation in fetal cultures only. These results indicate that the biological response of OPCs to inflammation and demyelination is different in fetal and adult cells, and that the glucose metabolism perturbation in fetal central nervous system (CNS) may significantly contribute to neonatal pathologies. An understanding of the underlying molecular mechanism will contribute greatly to differentiating myelination enhancing and neuroprotective therapies for neonatal and adult CNS white matter lesions.
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Affiliation(s)
- Vito Antonio Baldassarro
- Health Science and Technologies Interdepartmental Center for Industrial Research (HST-ICIR), University of Bologna, Bologna, Italy.,Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy.,Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France
| | | | - Luciana Giardino
- Health Science and Technologies Interdepartmental Center for Industrial Research (HST-ICIR), University of Bologna, Bologna, Italy.,IRET Foundation, Ozzano Emilia, Italy.,Department of Veterinary Medical Sciences, University of Bologna, Bologna, Italy
| | - Laura Calzà
- Health Science and Technologies Interdepartmental Center for Industrial Research (HST-ICIR), University of Bologna, Bologna, Italy.,Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy.,IRET Foundation, Ozzano Emilia, Italy
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4
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Bianco AC, Dumitrescu A, Gereben B, Ribeiro MO, Fonseca TL, Fernandes GW, Bocco BMLC. Paradigms of Dynamic Control of Thyroid Hormone Signaling. Endocr Rev 2019; 40:1000-1047. [PMID: 31033998 PMCID: PMC6596318 DOI: 10.1210/er.2018-00275] [Citation(s) in RCA: 140] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 03/15/2019] [Indexed: 12/17/2022]
Abstract
Thyroid hormone (TH) molecules enter cells via membrane transporters and, depending on the cell type, can be activated (i.e., T4 to T3 conversion) or inactivated (i.e., T3 to 3,3'-diiodo-l-thyronine or T4 to reverse T3 conversion). These reactions are catalyzed by the deiodinases. The biologically active hormone, T3, eventually binds to intracellular TH receptors (TRs), TRα and TRβ, and initiate TH signaling, that is, regulation of target genes and other metabolic pathways. At least three families of transmembrane transporters, MCT, OATP, and LAT, facilitate the entry of TH into cells, which follow the gradient of free hormone between the extracellular fluid and the cytoplasm. Inactivation or marked downregulation of TH transporters can dampen TH signaling. At the same time, dynamic modifications in the expression or activity of TRs and transcriptional coregulators can affect positively or negatively the intensity of TH signaling. However, the deiodinases are the element that provides greatest amplitude in dynamic control of TH signaling. Cells that express the activating deiodinase DIO2 can rapidly enhance TH signaling due to intracellular buildup of T3. In contrast, TH signaling is dampened in cells that express the inactivating deiodinase DIO3. This explains how THs can regulate pathways in development, metabolism, and growth, despite rather stable levels in the circulation. As a consequence, TH signaling is unique for each cell (tissue or organ), depending on circulating TH levels and on the exclusive blend of transporters, deiodinases, and TRs present in each cell. In this review we explore the key mechanisms underlying customization of TH signaling during development, in health and in disease states.
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Affiliation(s)
- Antonio C Bianco
- Section of Endocrinology, Diabetes, and Metabolism, University of Chicago Medical Center, Chicago, Illinois
| | - Alexandra Dumitrescu
- Section of Endocrinology, Diabetes, and Metabolism, University of Chicago Medical Center, Chicago, Illinois
| | - Balázs Gereben
- Department of Endocrine Neurobiology, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary
| | - Miriam O Ribeiro
- Developmental Disorders Program, Center of Biologic Sciences and Health, Mackenzie Presbyterian University, São Paulo, São Paulo, Brazil
| | - Tatiana L Fonseca
- Section of Endocrinology, Diabetes, and Metabolism, University of Chicago Medical Center, Chicago, Illinois
| | - Gustavo W Fernandes
- Section of Endocrinology, Diabetes, and Metabolism, University of Chicago Medical Center, Chicago, Illinois
| | - Barbara M L C Bocco
- Section of Endocrinology, Diabetes, and Metabolism, University of Chicago Medical Center, Chicago, Illinois
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5
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Calzà L, Baldassarro VA, Fernandez M, Giuliani A, Lorenzini L, Giardino L. Thyroid Hormone and the White Matter of the Central Nervous System: From Development to Repair. VITAMINS AND HORMONES 2018; 106:253-281. [DOI: 10.1016/bs.vh.2017.04.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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6
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Barakat-Walter I, Kraftsik R. Stimulating effect of thyroid hormones in peripheral nerve regeneration: research history and future direction toward clinical therapy. Neural Regen Res 2018; 13:599-608. [PMID: 29722302 PMCID: PMC5950660 DOI: 10.4103/1673-5374.230274] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Injury to peripheral nerves is often observed in the clinic and severe injuries may cause loss of motor and sensory functions. Despite extensive investigation, testing various surgical repair techniques and neurotrophic molecules, at present, a satisfactory method to ensuring successful recovery does not exist. For successful molecular therapy in nerve regeneration, it is essential to improve the intrinsic ability of neurons to survive and to increase the speed of axonal outgrowth. Also to induce Schwann cell phenotypical changes to prepare the local environment favorable for axonal regeneration and myelination. Therefore, any molecule that regulates gene expression of both neurons and Schwann cells could play a crucial role in peripheral nerve regeneration. Clinical and experimental studies have reported that thyroid hormones are essential for the normal development and function of the nervous system, so they could be candidates for nervous system regeneration. This review provides an overview of studies devoted to testing the effect of thyroid hormones on peripheral nerve regeneration. Also it emphasizes the importance of combining biodegradable tubes with local administration of triiodothyronine for future clinical therapy of human severe injured nerves. We highlight that the local and single administration of triiodothyronine within biodegradable nerve guide improves significantly the regeneration of severed peripheral nerves, and accelerates functional recovering. This technique provides a serious step towards future clinical application of triiodothyronine in human severe injured nerves. The possible regulatory mechanism by which triiodothyronine stimulates peripheral nerve regeneration is a rapid action on both axotomized neurons and Schwann cells.
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Affiliation(s)
- I Barakat-Walter
- Department of Fundamental Neurosciences, Faculty of Biology and Medicine, University of Lausanne, Lausanne, Switzerland
| | - R Kraftsik
- Department of Fundamental Neurosciences, Faculty of Biology and Medicine, University of Lausanne, Lausanne, Switzerland
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7
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Fernández M, Baldassarro VA, Sivilia S, Giardino L, Calzà L. Inflammation severely alters thyroid hormone signaling in the central nervous system during experimental allergic encephalomyelitis in rat: Direct impact on OPCs differentiation failure. Glia 2016; 64:1573-89. [PMID: 27404574 DOI: 10.1002/glia.23025] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 06/16/2016] [Accepted: 06/20/2016] [Indexed: 01/01/2023]
Abstract
Differentiation of oligodendrocyte precursor cells (OPCs) into myelinating oligodendrocytes is severely impaired by inflammatory cytokines and this could lead to remyelination failure in inflammatory/demyelinating diseases. Due to the role of thyroid hormone in the maturation of OPCs and developmental myelination, in this study we investigated (i) the possible occurrence of dysregulation of thyroid hormone signaling in the CNS tissue during experimental neuroinflammation; (ii) the possible impact of inflammatory cytokines on thyroid hormone signaling and OPCs differentiation in vitro. The disease model is the experimental allergic encephalomyelitis in female Dark-Agouti rats, whereas in vitro experiments were carried out in OPCs derived from neural stem cells. The main results are the following: (i) a strong upregulation of cytokine mRNA expression level was found in the spinal cord during experimental allergic encephalomyelitis; (ii) thyroid hormone signaling in the spinal cord (thyroid hormone receptors; deiodinase; thyroid hormone membrane transporter) is substantially downregulated, due to the upregulation of the thyroid hormone inactivating enzyme deiodinase 3 and the downregulation of thyroid hormone receptors, as investigated at mRNA expression level; (iii) when exposed to inflammatory cytokines, deiodinase 3 is upregulated in OPCs as well, and OPCs differentiation is blocked; (iv) deiodinase 3 inhibition by iopanoic acid recovers OPCs differentiation in the presence on inflammatory cytokines. These data suggest that cellular hypothyroidism occurs during experimental allergic encephalomyelitis, possibly impacting on thyroid hormone-dependent cellular processes, including maturation of OPCs into myelinating oligodendrocytes. GLIA 2016;64:1573-1589.
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Affiliation(s)
- Mercedes Fernández
- Health Science and Technology Interdepartmental Center for Industrial Research, University of Bologna, Bologna, Italy
| | - Vito A Baldassarro
- Health Science and Technology Interdepartmental Center for Industrial Research, University of Bologna, Bologna, Italy.,Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy
| | - Sandra Sivilia
- Department of Veterinary Medical Sciences, University of Bologna, Bologna, Italy
| | - Luciana Giardino
- Department of Veterinary Medical Sciences, University of Bologna, Bologna, Italy.,IRET Foundation, Ozzano Emilia, Bologna, Italy
| | - Laura Calzà
- Health Science and Technology Interdepartmental Center for Industrial Research, University of Bologna, Bologna, Italy.,Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy.,IRET Foundation, Ozzano Emilia, Bologna, Italy
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8
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Calzà L, Fernández M, Giardino L. Role of the Thyroid System in Myelination and Neural Connectivity. Compr Physiol 2015; 5:1405-21. [DOI: 10.1002/cphy.c140035] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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9
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Castroneves LA, Jugo RH, Maynard MA, Lee JS, Wassner AJ, Dorfman D, Bronson RT, Ukomadu C, Agoston AT, Ding L, Luongo C, Guo C, Song H, Demchev V, Lee NY, Feldman HA, Vella KR, Peake RW, Hartigan C, Kellogg MD, Desai A, Salvatore D, Dentice M, Huang SA. Mice with hepatocyte-specific deficiency of type 3 deiodinase have intact liver regeneration and accelerated recovery from nonthyroidal illness after toxin-induced hepatonecrosis. Endocrinology 2014; 155:4061-8. [PMID: 25004090 PMCID: PMC4164928 DOI: 10.1210/en.2013-2028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Type 3 deiodinase (D3), the physiologic inactivator of thyroid hormones, is induced during tissue injury and regeneration. This has led to the hypotheses that D3 impacts injury tolerance by reducing local T3 signaling and contributes to the fall in serum triiodothyronine (T3) observed in up to 75% of sick patients (termed the low T3 syndrome). Here we show that a novel mutant mouse with hepatocyte-specific D3 deficiency has normal local responses to toxin-induced hepatonecrosis, including normal degrees of tissue necrosis and intact regeneration, but accelerated systemic recovery from illness-induced hypothyroxinemia and hypotriiodothyroninemia, demonstrating that peripheral D3 expression is a key modulator of the low T3 syndrome.
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Affiliation(s)
- Luciana A Castroneves
- Thyroid Program of the Division of Endocrinology (L.A.C., R.H.J., M.A.M., J.S.L., A.J.W., C.C.G., H.D.S., N.Y.L., S.A.H.), Clinical Research Center (H.A.F), and Department of Laboratory Medicine (R.W.P., C.H., M.D.K), Boston Children's Hospital; Thyroid Section of the Division of Endocrinology, Diabetes, and Hypertension (S.A.H.), Department of Pathology (D.D., A.T.A.), and Division of Gastroenterology (C.U., V.D., A.D.), Brigham and Women's Hospital; Harvard Neurodiscovery Center (L.D.); Dana Farber Cancer Institute (R.T. B., S.A.H.); Division of Endocrinology (K.R.V.), Beth Israel Deaconess Medical Center, Boston, Massachusetts 02115; and Department of Molecular and Clinical Endocrinology and Oncology (C.L., D.S., M.D.), University of Naples Federico II, 80131 Naples, Italy
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10
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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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11
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Dentice M, Antonini D, Salvatore D. Type 3 deiodinase and solid tumors: an intriguing pair. Expert Opin Ther Targets 2013; 17:1369-79. [DOI: 10.1517/14728222.2013.833189] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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12
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Charalambous M, Hernandez A. Genomic imprinting of the type 3 thyroid hormone deiodinase gene: regulation and developmental implications. Biochim Biophys Acta Gen Subj 2012; 1830:3946-55. [PMID: 22498139 DOI: 10.1016/j.bbagen.2012.03.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2012] [Revised: 03/08/2012] [Accepted: 03/23/2012] [Indexed: 02/03/2023]
Abstract
BACKGROUND In recent years, findings in a number of animal and human models have ignited renewed interest in the type 3 deiodinase (D3), the main enzyme responsible for the inactivation of thyroid hormones. The induction of D3 in models of illness and injury has raised critical questions about the physiological significance of reduced thyroid hormone availability in those states. Phenotypes in transgenic mice lacking this enzyme also point to important developmental roles for D3. A critical determinant of D3 expression is genomic imprinting, an epigenetic phenomenon that regulates a small number of dosage-critical genes in the mammalian genome. The D3 gene (Dio3) is imprinted and preferentially expressed from one of the alleles in most tissues. SCOPE OF REVIEW In the context of the physiological significance of D3 and the characteristics and purported origins of genomic imprinting, we review the current knowledge about the epigenetic mechanisms specifying gene dosage in the Dio3 locus. MAJOR CONCLUSIONS Altered Dio3 dosage is detrimental to development, suggesting that the level of thyroid hormone action needs to be exquisitely tailored in a timely fashion to the requirements of particular tissues. An appropriate Dio3 dosage is the result of the coordinated action of certain genomic elements and epigenetic marks in the Dlk1-Dio3 domain. GENERAL SIGNIFICANCE The imprinting of Dio3 prompts intriguing questions about why the level of thyroid hormone signaling should be regulated in this rare epigenetic manner, and to what extent altered Dio3 expression due to aberrant imprinting may be implicated in human conditions. This article is part of a Special Issue entitled Thyroid hormone signalling.
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Affiliation(s)
- Marika Charalambous
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, UK
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13
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Marsili A, Zavacki AM, Harney JW, Larsen PR. Physiological role and regulation of iodothyronine deiodinases: a 2011 update. J Endocrinol Invest 2011; 34:395-407. [PMID: 21427525 PMCID: PMC3687787 DOI: 10.1007/bf03347465] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
T4 is a prohormone secreted by the thyroid. T4 has a long half life in circulation and it is tightly regulated to remain constant in a variety of circumstances. However, the availability of iodothyronine selenodeiodinases allow both the initiation or the cessation of thyroid hormone action and can result in surprisingly acute changes in the intracellular concentration of the active hormone T3, in a tissue- specific and chronologically-determined fashion, in spite of the constant circulating levels of the prohormone. This fine-tuning of thyroid hormone signaling is becoming widely appreciated in the context of situations where the rapid modifications in intracellular T3 concentrations are necessary for developmental changes or tissue repair. Given the increasing availability of genetic models of deiodinase deficiency, new insights into the role of these important enzymes are being recognized. In this review, we have incorporated new information regarding the special role played by these enzymes into our current knowledge of thyroid physiology, emphasizing the clinical significance of these new insights.
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Affiliation(s)
- Alessandro Marsili
- Thyroid Section, Division of Endocrinology, Diabetes and Hypertension, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Ann Marie Zavacki
- Thyroid Section, Division of Endocrinology, Diabetes and Hypertension, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - John W. Harney
- Thyroid Section, Division of Endocrinology, Diabetes and Hypertension, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - P. Reed Larsen
- Thyroid Section, Division of Endocrinology, Diabetes and Hypertension, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
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14
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Freitas BC, Gereben B, Castillo M, Kalló I, Zeöld A, Egri P, Liposits Z, Zavacki AM, Maciel RM, Jo S, Singru P, Sanchez E, Lechan RM, Bianco AC. Paracrine signaling by glial cell-derived triiodothyronine activates neuronal gene expression in the rodent brain and human cells. J Clin Invest 2010; 120:2206-17. [PMID: 20458138 PMCID: PMC2877954 DOI: 10.1172/jci41977] [Citation(s) in RCA: 121] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2009] [Accepted: 03/17/2010] [Indexed: 12/26/2022] Open
Abstract
Hypothyroidism in humans is characterized by severe neurological consequences that are often irreversible, highlighting the critical role of thyroid hormone (TH) in the brain. Despite this, not much is known about the signaling pathways that control TH action in the brain. What is known is that the prohormone thyroxine (T4) is converted to the active hormone triiodothyronine (T3) by type 2 deiodinase (D2) and that this occurs in astrocytes, while TH receptors and type 3 deiodinase (D3), which inactivates T3, are found in adjacent neurons. Here, we modeled TH action in the brain using an in vitro coculture system of D2-expressing H4 human glioma cells and D3-expressing SK-N-AS human neuroblastoma cells. We found that glial cell D2 activity resulted in increased T3 production, which acted in a paracrine fashion to induce T3-responsive genes, including ectonucleotide pyrophosphatase/phosphodiesterase 2 (ENPP2), in the cocultured neurons. D3 activity in the neurons modulated these effects. Furthermore, this paracrine pathway was regulated by signals such as hypoxia, hedgehog signaling, and LPS-induced inflammation, as evidenced both in the in vitro coculture system and in in vivo rat models of brain ischemia and mouse models of inflammation. This study therefore presents what we believe to be the first direct evidence for a paracrine loop linking glial D2 activity to TH receptors in neurons, thereby identifying deiodinases as potential control points for the regulation of TH signaling in the brain during health and disease.
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Affiliation(s)
- Beatriz C.G. Freitas
- Laboratory of Molecular Endocrinology, Division of Endocrinology, Department of Medicine, Federal University of São Paulo, São Paulo SP, Brazil.
Laboratory of Endocrine Neurobiology, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary.
Division of Endocrinology, Diabetes and Metabolism, University of Miami Miller School of Medicine, Miami, Florida, USA.
Thyroid Section, Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women’s Hospital, Boston, Massachusetts, USA.
Tupper Research Institute, Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, Tufts Medical Center, Boston, Massachusetts, USA.
Department of Neuroscience, Tufts University School of Medicine, Boston, Massachusetts, USA
| | - Balázs Gereben
- Laboratory of Molecular Endocrinology, Division of Endocrinology, Department of Medicine, Federal University of São Paulo, São Paulo SP, Brazil.
Laboratory of Endocrine Neurobiology, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary.
Division of Endocrinology, Diabetes and Metabolism, University of Miami Miller School of Medicine, Miami, Florida, USA.
Thyroid Section, Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women’s Hospital, Boston, Massachusetts, USA.
Tupper Research Institute, Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, Tufts Medical Center, Boston, Massachusetts, USA.
Department of Neuroscience, Tufts University School of Medicine, Boston, Massachusetts, USA
| | - Melany Castillo
- Laboratory of Molecular Endocrinology, Division of Endocrinology, Department of Medicine, Federal University of São Paulo, São Paulo SP, Brazil.
Laboratory of Endocrine Neurobiology, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary.
Division of Endocrinology, Diabetes and Metabolism, University of Miami Miller School of Medicine, Miami, Florida, USA.
Thyroid Section, Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women’s Hospital, Boston, Massachusetts, USA.
Tupper Research Institute, Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, Tufts Medical Center, Boston, Massachusetts, USA.
Department of Neuroscience, Tufts University School of Medicine, Boston, Massachusetts, USA
| | - Imre Kalló
- Laboratory of Molecular Endocrinology, Division of Endocrinology, Department of Medicine, Federal University of São Paulo, São Paulo SP, Brazil.
Laboratory of Endocrine Neurobiology, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary.
Division of Endocrinology, Diabetes and Metabolism, University of Miami Miller School of Medicine, Miami, Florida, USA.
Thyroid Section, Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women’s Hospital, Boston, Massachusetts, USA.
Tupper Research Institute, Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, Tufts Medical Center, Boston, Massachusetts, USA.
Department of Neuroscience, Tufts University School of Medicine, Boston, Massachusetts, USA
| | - Anikó Zeöld
- Laboratory of Molecular Endocrinology, Division of Endocrinology, Department of Medicine, Federal University of São Paulo, São Paulo SP, Brazil.
Laboratory of Endocrine Neurobiology, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary.
Division of Endocrinology, Diabetes and Metabolism, University of Miami Miller School of Medicine, Miami, Florida, USA.
Thyroid Section, Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women’s Hospital, Boston, Massachusetts, USA.
Tupper Research Institute, Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, Tufts Medical Center, Boston, Massachusetts, USA.
Department of Neuroscience, Tufts University School of Medicine, Boston, Massachusetts, USA
| | - Péter Egri
- Laboratory of Molecular Endocrinology, Division of Endocrinology, Department of Medicine, Federal University of São Paulo, São Paulo SP, Brazil.
Laboratory of Endocrine Neurobiology, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary.
Division of Endocrinology, Diabetes and Metabolism, University of Miami Miller School of Medicine, Miami, Florida, USA.
Thyroid Section, Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women’s Hospital, Boston, Massachusetts, USA.
Tupper Research Institute, Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, Tufts Medical Center, Boston, Massachusetts, USA.
Department of Neuroscience, Tufts University School of Medicine, Boston, Massachusetts, USA
| | - Zsolt Liposits
- Laboratory of Molecular Endocrinology, Division of Endocrinology, Department of Medicine, Federal University of São Paulo, São Paulo SP, Brazil.
Laboratory of Endocrine Neurobiology, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary.
Division of Endocrinology, Diabetes and Metabolism, University of Miami Miller School of Medicine, Miami, Florida, USA.
Thyroid Section, Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women’s Hospital, Boston, Massachusetts, USA.
Tupper Research Institute, Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, Tufts Medical Center, Boston, Massachusetts, USA.
Department of Neuroscience, Tufts University School of Medicine, Boston, Massachusetts, USA
| | - Ann Marie Zavacki
- Laboratory of Molecular Endocrinology, Division of Endocrinology, Department of Medicine, Federal University of São Paulo, São Paulo SP, Brazil.
Laboratory of Endocrine Neurobiology, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary.
Division of Endocrinology, Diabetes and Metabolism, University of Miami Miller School of Medicine, Miami, Florida, USA.
Thyroid Section, Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women’s Hospital, Boston, Massachusetts, USA.
Tupper Research Institute, Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, Tufts Medical Center, Boston, Massachusetts, USA.
Department of Neuroscience, Tufts University School of Medicine, Boston, Massachusetts, USA
| | - Rui M.B. Maciel
- Laboratory of Molecular Endocrinology, Division of Endocrinology, Department of Medicine, Federal University of São Paulo, São Paulo SP, Brazil.
Laboratory of Endocrine Neurobiology, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary.
Division of Endocrinology, Diabetes and Metabolism, University of Miami Miller School of Medicine, Miami, Florida, USA.
Thyroid Section, Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women’s Hospital, Boston, Massachusetts, USA.
Tupper Research Institute, Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, Tufts Medical Center, Boston, Massachusetts, USA.
Department of Neuroscience, Tufts University School of Medicine, Boston, Massachusetts, USA
| | - Sungro Jo
- Laboratory of Molecular Endocrinology, Division of Endocrinology, Department of Medicine, Federal University of São Paulo, São Paulo SP, Brazil.
Laboratory of Endocrine Neurobiology, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary.
Division of Endocrinology, Diabetes and Metabolism, University of Miami Miller School of Medicine, Miami, Florida, USA.
Thyroid Section, Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women’s Hospital, Boston, Massachusetts, USA.
Tupper Research Institute, Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, Tufts Medical Center, Boston, Massachusetts, USA.
Department of Neuroscience, Tufts University School of Medicine, Boston, Massachusetts, USA
| | - Praful Singru
- Laboratory of Molecular Endocrinology, Division of Endocrinology, Department of Medicine, Federal University of São Paulo, São Paulo SP, Brazil.
Laboratory of Endocrine Neurobiology, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary.
Division of Endocrinology, Diabetes and Metabolism, University of Miami Miller School of Medicine, Miami, Florida, USA.
Thyroid Section, Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women’s Hospital, Boston, Massachusetts, USA.
Tupper Research Institute, Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, Tufts Medical Center, Boston, Massachusetts, USA.
Department of Neuroscience, Tufts University School of Medicine, Boston, Massachusetts, USA
| | - Edith Sanchez
- Laboratory of Molecular Endocrinology, Division of Endocrinology, Department of Medicine, Federal University of São Paulo, São Paulo SP, Brazil.
Laboratory of Endocrine Neurobiology, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary.
Division of Endocrinology, Diabetes and Metabolism, University of Miami Miller School of Medicine, Miami, Florida, USA.
Thyroid Section, Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women’s Hospital, Boston, Massachusetts, USA.
Tupper Research Institute, Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, Tufts Medical Center, Boston, Massachusetts, USA.
Department of Neuroscience, Tufts University School of Medicine, Boston, Massachusetts, USA
| | - Ronald M. Lechan
- Laboratory of Molecular Endocrinology, Division of Endocrinology, Department of Medicine, Federal University of São Paulo, São Paulo SP, Brazil.
Laboratory of Endocrine Neurobiology, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary.
Division of Endocrinology, Diabetes and Metabolism, University of Miami Miller School of Medicine, Miami, Florida, USA.
Thyroid Section, Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women’s Hospital, Boston, Massachusetts, USA.
Tupper Research Institute, Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, Tufts Medical Center, Boston, Massachusetts, USA.
Department of Neuroscience, Tufts University School of Medicine, Boston, Massachusetts, USA
| | - Antonio C. Bianco
- Laboratory of Molecular Endocrinology, Division of Endocrinology, Department of Medicine, Federal University of São Paulo, São Paulo SP, Brazil.
Laboratory of Endocrine Neurobiology, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary.
Division of Endocrinology, Diabetes and Metabolism, University of Miami Miller School of Medicine, Miami, Florida, USA.
Thyroid Section, Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women’s Hospital, Boston, Massachusetts, USA.
Tupper Research Institute, Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, Tufts Medical Center, Boston, Massachusetts, USA.
Department of Neuroscience, Tufts University School of Medicine, Boston, Massachusetts, USA
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15
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Bessede T, Alsaid B, Ferretti L, Pierre M, Bernabé J, Giuliano F, Karam I, Benoît G, Droupy S. Effect of a Local Delivery of Triiodothyronine (T3) Within Neuroregenerative Guide on Recovery of Erectile Function in a Rat-Model of Cavernous Nerve Injury. J Sex Med 2010; 7:1798-806. [DOI: 10.1111/j.1743-6109.2010.01706.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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St Germain DL, Galton VA, Hernandez A. Minireview: Defining the roles of the iodothyronine deiodinases: current concepts and challenges. Endocrinology 2009; 150:1097-107. [PMID: 19179439 PMCID: PMC2654746 DOI: 10.1210/en.2008-1588] [Citation(s) in RCA: 192] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/10/2008] [Accepted: 01/06/2009] [Indexed: 12/22/2022]
Abstract
As is typical of other hormone systems, the actions of the thyroid hormones (TH) differ from tissue to tissue depending upon a number of variables. In addition to varying expression levels of TH receptors and transporters, differing patterns of TH metabolism provide a critical mechanism whereby TH action can be individualized in cells depending on the needs of the organism. The iodothyronine deiodinases constitute a family of selenoenzymes that selectively remove iodide from thyroxine and its derivatives, thus activating or inactivating these hormones. Three deiodinases have been identified, and much has been learned regarding the differing structures, catalytic activities, and expression patterns of these proteins. Because of their differing properties, the deiodinases appear to serve varying functions that are important in regulating metabolic processes, TH action during development, and feedback control of the thyroid axis. This review will briefly assess these functional roles and others proposed for the deiodinases and examine some of the current challenges in expanding our knowledge of these important components of the thyroid homeostatic system.
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Affiliation(s)
- Donald L St Germain
- Department of Medicine, Dartmouth Medical School, Lebanon, New Hampshire 03756, USA.
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17
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Huang SA. Deiodination and cellular proliferation: parallels between development, differentiation, tumorigenesis, and now regeneration. Endocrinology 2009; 150:3-4. [PMID: 19114598 PMCID: PMC2630899 DOI: 10.1210/en.2008-1460] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Stephen A Huang
- Thyroid Program of the Division of Endocrinology, Children's Hospital Boston, 300 Longwood Avenue, Boston, Massachusetts 02115, USA.
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18
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Gereben B, Zavacki AM, Ribich S, Kim BW, Huang SA, Simonides WS, Zeöld A, Bianco AC. Cellular and molecular basis of deiodinase-regulated thyroid hormone signaling. Endocr Rev 2008; 29:898-938. [PMID: 18815314 PMCID: PMC2647704 DOI: 10.1210/er.2008-0019] [Citation(s) in RCA: 552] [Impact Index Per Article: 34.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2008] [Accepted: 08/15/2008] [Indexed: 02/06/2023]
Abstract
The iodothyronine deiodinases initiate or terminate thyroid hormone action and therefore are critical for the biological effects mediated by thyroid hormone. Over the years, research has focused on their role in preserving serum levels of the biologically active molecule T(3) during iodine deficiency. More recently, a fascinating new role of these enzymes has been unveiled. The activating deiodinase (D2) and the inactivating deiodinase (D3) can locally increase or decrease thyroid hormone signaling in a tissue- and temporal-specific fashion, independent of changes in thyroid hormone serum concentrations. This mechanism is particularly relevant because deiodinase expression can be modulated by a wide variety of endogenous signaling molecules such as sonic hedgehog, nuclear factor-kappaB, growth factors, bile acids, hypoxia-inducible factor-1alpha, as well as a growing number of xenobiotic substances. In light of these findings, it seems clear that deiodinases play a much broader role than once thought, with great ramifications for the control of thyroid hormone signaling during vertebrate development and metamorphosis, as well as injury response, tissue repair, hypothalamic function, and energy homeostasis in adults.
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Affiliation(s)
- Balázs Gereben
- Laboratory of Endocrine Neurobiology, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary
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19
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Lamirand A, Pallud-Mothré S, Ramaugé M, Pierre M, Courtin F. Oxidative stress regulates type 3 deiodinase and type 2 deiodinase in cultured rat astrocytes. Endocrinology 2008; 149:3713-21. [PMID: 18420745 DOI: 10.1210/en.2007-1462] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Type 2 deiodinase (D2) and type 3 deiodinase (D3) locally achieve the determination of the concentration of T3, which binds to the thyroid hormone receptor with high affinity. D2 converts T4 into T3, and D3 degrades T4 and T3. Neurons take up T3 released by astrocytes, the main cerebral site for the D2 expression. Because oxidative stress is believed to be involved in several neurological disorders, we explored the effects of oxidative stress on D3 and D2 in primary culture of rat astrocytes. H2O2 (250 microm) increased D3 activity with maximal effects around 8 h. Stimulation of D3 activity by H2O2 was synergistic with T4, phorbol ester, and also cAMP. H2O2 (250 microm) did not affect basal D2 activity but inhibited the stimulation of D2 activity by cAMP and factors implicating cAMP-independent pathways in astrocytes, TSH, and phorbol ester. N-Acetyl cysteine and selenium repletion, which respectively increase intracellular glutathione and glutathione peroxidase, inhibited D2 and D3 regulation by H2O2, whereas L-buthionine sulfoximine, which decreases intracellular glutathione, mimicked H2O2 effects. Oxidative stress up-regulated D3 and inhibited cAMP-stimulated D2 by transcriptional mechanisms. A decrease in cAMP by oxidative stress could contribute to the inhibition of cAMP-stimulated D2. Using specific inhibitors of signaling pathways, we show that the ERK pathway was required in D2 and D3 regulation by oxidative stress and that the p38 MAPK pathway was implicated in H2O2-induced D3. We suggest that the expected decrease in T3 might modulate the cellular injury of oxidative stress in some pathological brain conditions.
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Affiliation(s)
- Audrey Lamirand
- Institut National de la Santé et de la Recherche Médicale, UMR 854, 80 rue du Général Leclerc, Le Kremlin-Bicêtre, France
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20
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Huang SA, Bianco AC. Reawakened interest in type III iodothyronine deiodinase in critical illness and injury. ACTA ACUST UNITED AC 2008; 4:148-55. [PMID: 18212764 DOI: 10.1038/ncpendmet0727] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2007] [Accepted: 11/23/2007] [Indexed: 02/06/2023]
Abstract
Thyroid hormones influence gene expression in virtually all vertebrate tissues. Precise regulation of the active endogenous ligand, 3,5,3'-triiodothyronine (T(3)), is achieved by the sequential removal of iodine moieties from the thyroid hormone molecule. Type III iodothyronine deiodinase (D3) is the major inactivating enzyme terminating the action of T(3) and preventing activation of the prohormone, thyroxine (T(4)). Recent studies have revealed the induction of high D3 activity in diverse animal models of tissue injury including starvation, cryolesion, cardiac hypertrophy, infarction, and chronic inflammation. By analyzing serum and tissues taken from hospitalized patients at the time of death, investigators have also documented the robust induction of D3 activity in several human tissues that normally have none, including the liver and skeletal muscle, and shown clinically relevant consequences to systemic thyroid status. These studies reveal a novel role of D3 in the tissue response to injury and in the derangement of thyroid hormone homeostasis commonly observed during critical illness.
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Sarliève LL, Rodríguez-Peña A, Langley K. Expression of thyroid hormone receptor isoforms in the oligodendrocyte lineage. Neurochem Res 2004; 29:903-22. [PMID: 15139289 DOI: 10.1023/b:nere.0000021235.83952.9a] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Thyroid hormone (T3) regulates brain development and function and in particular ensures normal myelination. Animal models and in vitro systems have been employed to demonstrate the effects of T3, which acts via nuclear hormone receptors. T3 receptors (TRs) are transcription factors that activate or suppress target gene expression, such as myelin basic protein (MBP), in a hormone-dependent or -independent fashion. Two distinct genes, TR alpha and TR beta, encode several receptor isoforms with specific functions. This overview summarizes current knowledge on the cellular expression and the role of these isoforms and also examines the action of T3 on oligodendrocyte lineage cell types at defined developmental stages. Re-expression of TRs and also that of other transcription factors in oligodendrocytes may constitute some of the metabolic changes required for succesfull remyelination in the adult central nervous system after demyelinating lesions.
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Affiliation(s)
- Louis L Sarliève
- ER2072 du CNRS, Faculté de Médecine, Institut de Chimie Biologique, 11 rue Humann, 67085, Strasbourg, France.
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