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Sui X, Jiang S, Zhang H, Wu F, Wang H, Yang C, Guo Y, Wang L, Li Y, Dai Z. The influence of extended fasting on thyroid hormone: local and differentiated regulatory mechanisms. Front Endocrinol (Lausanne) 2024; 15:1443051. [PMID: 39253586 PMCID: PMC11381305 DOI: 10.3389/fendo.2024.1443051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2024] [Accepted: 08/07/2024] [Indexed: 09/11/2024] Open
Abstract
The hypometabolism induced by fasting has great potential in maintaining health and improving survival in extreme environments, among which thyroid hormone (TH) plays an important role in the adaptation and the formation of new energy metabolism homeostasis during long-term fasting. In the present review, we emphasize the potential of long-term fasting to improve physical health and emergency rescue in extreme environments, introduce the concept and pattern of fasting and its impact on the body's energy metabolism consumption. Prolonged fasting has more application potential in emergency rescue in special environments. The changes of THs caused by fasting, including serum biochemical characteristics, responsiveness of the peripheral and central hypothalamus-pituitary-thyroid (HPT) axis, and differential changes of TH metabolism, are emphasized in particular. It was proposed that the variability between brain and liver tissues in THs uptake, deiodination activation and inactivation is the key regulatory mechanism for the cause of peripheral THs decline and central homeostasis. While hypothalamic tanycytes play a pivotal role in the fine regulation of the HPT negative feedback regulation during long-term fasting. The study progress of tanycytes on thyrotropin-releasing hormone (TRH) release and deiodination is described in detail. In conclusion, the combination of the decrease of TH metabolism in peripheral tissues and stability in the central HPT axis maintains the basal physiological requirement and new energy metabolism homeostasis to adapt to long-term food scarcity. The molecular mechanisms of this localized and differential regulation will be a key research direction for developing measures for hypometabolic applications in extreme environment.
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Affiliation(s)
- Xiukun Sui
- State Key Laboratory of Space Medicine, China Astronaut Research and Training Center, Beijing, China
| | - Siyu Jiang
- State Key Laboratory of Space Medicine, China Astronaut Research and Training Center, Beijing, China
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
| | - Hongyu Zhang
- State Key Laboratory of Space Medicine, China Astronaut Research and Training Center, Beijing, China
| | - Feng Wu
- State Key Laboratory of Space Medicine, China Astronaut Research and Training Center, Beijing, China
| | - Hailong Wang
- State Key Laboratory of Space Medicine, China Astronaut Research and Training Center, Beijing, China
| | - Chao Yang
- State Key Laboratory of Space Medicine, China Astronaut Research and Training Center, Beijing, China
| | - Yaxiu Guo
- State Key Laboratory of Space Medicine, China Astronaut Research and Training Center, Beijing, China
| | - Linjie Wang
- State Key Laboratory of Space Medicine, China Astronaut Research and Training Center, Beijing, China
| | - Yinghui Li
- State Key Laboratory of Space Medicine, China Astronaut Research and Training Center, Beijing, China
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
| | - Zhongquan Dai
- State Key Laboratory of Space Medicine, China Astronaut Research and Training Center, Beijing, China
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Gabriel de Almeida G, Bolin AP, Batistuzzo A, Fonseca TL, Ribeiro MO, Bianco AC. Genetic Background Strongly Influences the Impact of Carrying the Thr92Ala-DIO2 Polymorphism in the Male Mouse. Endocrinology 2024; 165:bqae064. [PMID: 38836615 PMCID: PMC11181002 DOI: 10.1210/endocr/bqae064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 05/27/2024] [Accepted: 05/31/2024] [Indexed: 06/06/2024]
Abstract
About half of the world population carries at least one allele of the Ala92-DIO2, which slows down the activity of the type 2 deiodinase (D2), the enzyme that activates T4 to T3. Carrying the Ala92-DIO2 allele has been associated with increased body mass index and insulin resistance, but this has not been reproduced in all populations. To test if the genetic background affects the impact of this polymorphism, here we studied the genetically distant C57Bl/6J (B6) and FVB/N (FVB) mice carrying the Ala92-Dio2 allele as compared to control mice carrying the Thr92-Dio2 allele. Whereas B6-Ala92-Dio2 and B6-Thr92-Dio2 mice-fed chow or high-fat diet-behaved metabolically similar in studies using indirect calorimetry, glucose- and insulin tolerance tests, and measuring white adipose tissue (WAT) weight and liver steatosis, major differences were observed between FVB-Ala92-Dio2 and FVB-Thr92-Dio2 mice: carrying the Ala92-Dio2 allele (on a chow diet) resulted in hypercholesterolemia, smaller WAT pads, hepatomegaly, steatosis, and transcriptome changes in the interscapular brown adipose tissue (iBAT) typical of ER stress and apoptosis. Acclimatization at thermoneutrality (30 °C) eliminated most of the metabolic phenotype, indicating that impaired adaptive (BAT) thermogenesis can be involved. In conclusion, the metabolic impact of carrying the Ala92-Dio2 allele depends greatly on the genetic background of the mouse, varying from no phenotype in B6 mice to a major phenotype in FVB mice. These results will help the planning of future clinical trials studying the Thr92Ala-DIO2 polymorphism and may explain why some clinical studies performed in different populations across the globe have obtained inconsistent results.
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Affiliation(s)
- Guilherme Gabriel de Almeida
- Section of Adult and Pediatric Endocrinology, Diabetes & Metabolism, University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Anaysa P Bolin
- Department of Pharmacology, Biomedical Science Institute, University of São Paulo, São Paulo 05508, Brazil
| | - Alice Batistuzzo
- Section of Adult and Pediatric Endocrinology, Diabetes & Metabolism, University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Tatiana L Fonseca
- Section of Adult and Pediatric Endocrinology, Diabetes & Metabolism, University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Miriam O Ribeiro
- Human Developmental Sciences Graduate Program, Center for Biological and Health Sciences, Presbyterian Mackenzie University, São Paulo, SP 01302, Brazil
| | - Antonio C Bianco
- Section of Adult and Pediatric Endocrinology, Diabetes & Metabolism, University of Chicago Medical Center, Chicago, IL 60637, USA
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Pan Y, Hu M, Zhao F, Ren J. Associations between low muscle mass and clinical characteristics of health population in China. Osteoporos Sarcopenia 2024; 10:35-39. [PMID: 38690545 PMCID: PMC11056461 DOI: 10.1016/j.afos.2024.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 11/27/2023] [Accepted: 02/24/2024] [Indexed: 05/02/2024] Open
Abstract
Objectives The primary aim of this study is to discern the association between specific clinical parameters and low muscle mass (LMM). We endeavor to elucidate the determinants of LMM and the predictive potency of individual factors. Methods In this retrospective cross-sectional study, we encompassed 450 older adult Chinese participants (252 males and 198 females). Muscle mass quantifications were performed using bioelectrical impedance analysis. Comprehensive data encompassing demographic details (age, sex, height, and weight) and laboratory results (complete blood count, thyroid function, liver function, and renal function) were systematically recorded. Logistic regression models, coupled with receiver operating characteristic curve analytics, were employed to ascertain the variables influencing LMM and to evaluate the predictive validity of each parameter on LMM. Results Upon confounding adjustment for age, gender, body mass index (BMI), and free thyroxine (FT4) persisted as a determinant of LMM. Specifically, individuals with an FT4 exceeding 1.105 ng/dL exhibited a 1.803-fold increased propensity for LMM relative to those with FT4 values below the specified threshold. Incorporating age, gender, BMI, and FT4 in the diagnostic algorithm enhanced the precision of LMM. The results differ between men and women. In the male population, we can still observe that FT4 has a certain value in the diagnosis of LMM, but this phenomenon is not found in the female population. Conclusions Elevated FT4 concentrations, albeit within clinically accepted limits, are inversely associated with muscle mass. As such, FT4 could be postulated as a potential biomarker for LMM in geriatric individuals, especially in the male group.
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Affiliation(s)
- Yunfei Pan
- Department of General Medicine, Huzhou Hospital of Zhejiang University School of Medicine, Huzhou, Zhejing, 313000, China
| | - Mengjie Hu
- Department of General Medicine, The First Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejing, 310003, China
| | - Feimin Zhao
- Department of Geriatric Medicine, Huzhou Central Hospital, Affiliated Central Hospital of Huzhou University, Huzhou, Zhejing, 313000, China
| | - Jingjing Ren
- Department of General Medicine, The First Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejing, 310003, China
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Mild Endurance Exercise during Fasting Increases Gastrocnemius Muscle and Prefrontal Cortex Thyroid Hormone Levels through Differential BHB and BCAA-Mediated BDNF-mTOR Signaling in Rats. Nutrients 2022; 14:nu14061166. [PMID: 35334826 PMCID: PMC8952016 DOI: 10.3390/nu14061166] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 03/04/2022] [Accepted: 03/08/2022] [Indexed: 12/11/2022] Open
Abstract
Mild endurance exercise has been shown to compensate for declined muscle quality and may positively affect the brain under conditions of energy restriction. Whether this involves brain-derived neurotrophic factor (BDNF) and mammalian target of rapamycin (mTOR) activation in relation to central and peripheral tissue levels of associated factors such as beta hydroxy butyrate (BHB), branched-chain amino acids (BCAA) and thyroid hormone (T3) has not been studied. Thus, a subset of male Wistar rats housed at thermoneutrality that were fed or fasted was submitted to 30-min-mild treadmill exercise bouts (five in total, twice daily, 15 m/min, 0° inclination) over a period of 66 h. Prefrontal cortex and gastrocnemius muscle BHB, BCAA, and thyroid hormone were measured by LC-MS/MS analysis and were related to BDNF and mammalian target of rapamycin (mTOR) signaling. In gastrocnemius muscle, mild endurance exercise during fasting maintained the fasting-induced elevated BHB levels and BDNF-CREB activity and unlocked the downstream Akt-mTORC1 pathway associated with increased tissue BCAA. Consequently, deiodinase 3 mRNA levels decreased whereas increased phosphorylation of the mTORC2 target FOXO1 was associated with increased deiodinase 2 mRNA levels, accounting for the increased T3 tissue levels. These events were related to increased expression of CREB and T3 target genes beneficial for muscle quality previously observed in this condition. In rat L6 myoblasts, BHB directly induced BDNF transcription and maturation. Mild endurance exercise during fasting did not increase prefrontal cortex BHB levels nor was BDNF activated, whereas increased leucine levels were associated with Akt-independent increased phosphorylation of the mTORC1 target P70S6K. The associated increased T3 levels modulated the expression of known T3-target genes involved in brain tissue maintenance. Our observation that mild endurance exercise modulates BDNF, mTOR and T3 during fasting provides molecular clues to explain the observed beneficial effects of mild endurance exercise in settings of energy restriction.
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Strączkowski M, Nikołajuk A, Stefanowicz M, Matulewicz N, Fernandez-Real JM, Karczewska-Kupczewska M. Adipose Tissue and Skeletal Muscle Expression of Genes Associated with Thyroid Hormone Action in Obesity and Insulin Resistance. Thyroid 2022; 32:206-214. [PMID: 34610751 DOI: 10.1089/thy.2021.0351] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Background: Thyroid hormone (TH) regulates metabolic pathways which may interfere with insulin action. There is limited knowledge on adipose tissue (AT) and skeletal muscle (SM) expression of genes associated with TH action in relation to insulin sensitivity. The aim of this study was to analyze AT and SM expression of the genes associated with TH action in subjects with different degree of insulin sensitivity and the regulation of these genes by insulin and free fatty acids (FFA). Methods: The study group comprised 72 euthyroid male subjects: 36 normal weight subjects and 36 overweight/obese subjects. Two-hour hyperinsulinemic-euglycemic clamp and tissue biopsies were performed. In the subgroup of 20 subjects, 9 normal weight subjects and 11 overweight/obese subjects, clamp was prolonged to 6 hours and another clamp with Intralipid/heparin infusion was performed after 1 week. Tissue biopsies were performed before and after each clamp. Results: Overweight/obese subjects had higher AT DIO2, DIO3, and NCOR1, lower AT THRA and PPARGC1A, higher SM NCOR1, and lower SM DIO2, DIO3, PPARGC1A, and ATP2A2 expression. In AT, DIO2 and PPARGC1A increased, whereas NCOR1 and FOXO1 decreased after the clamp only in normal weight individuals. DIO3 decreased in both groups. In SM, NCOR1 decreased, whereas PPARGC1A and ATP2A2 increased after the clamp only in normal weight individuals. Tissue THRA and THRB decreased in both groups. Intralipid/heparin abolished these effects. Conclusions: Alterations in AT and SM expression of TH-related gene indicate a decreased tissue TH action in obesity. Inability to increase TH-related gene expression in obesity and during FFA oversupply may contribute to the aggravation of lipotoxicity.
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Affiliation(s)
- Marek Strączkowski
- Department of Prophylaxis of Metabolic Diseases, Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Olsztyn, Poland
| | - Agnieszka Nikołajuk
- Department of Prophylaxis of Metabolic Diseases, Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Olsztyn, Poland
| | - Magdalena Stefanowicz
- Department of Metabolic Diseases, Medical University of Białystok, Białystok, Poland
| | - Natalia Matulewicz
- Department of Metabolic Diseases, Medical University of Białystok, Białystok, Poland
| | - Jose Manuel Fernandez-Real
- Department of Diabetes, Endocrinology and Nutrition, Dr. Josep Trueta University Hospital, Girona, Spain
- Department of Medical Sciences, Faculty of Medicine, University of Girona, Girona, Spain
- CIBERobn Pathophysiology of Obesity and Nutrition, Girona, Spain
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Stephens CS, Hill-Ricciuti A, Francoeur L, Johnson PA. Feeding level is associated with altered liver transcriptome and follicle selection in the hen. Biol Reprod 2022; 106:943-952. [PMID: 35084018 DOI: 10.1093/biolre/ioac013] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Revised: 11/04/2021] [Accepted: 01/24/2022] [Indexed: 11/15/2022] Open
Abstract
Genetic selection for particular traits in domestic animals may have altered the optimal feedback regulation among systems regulating appetite, growth, and reproduction. Broiler breeder chickens have been selected for fast and efficient growth and, unless feed restricted, consume excessively resulting in poor reproductive efficiency. We examined the effect of dietary treatment in full fed (FF) and restricted fed (RF) broiler breeder hens on ovarian responses and on liver morphology and transcriptome associated with reproductive function. Although FF broiler breeder hens had lower egg production (p < 0.01), the total number of ovarian follicles >8 mm (p < 0.01), 6-8 mm (p < 0.03), and 3-5 mm (p < 0.04) were greater in FF hens compared to RF hens. There was a large amount of lipid accumulation in the liver of FF hens and differential gene analysis yielded 120 genes that were differentially expressed >2-fold in response to feeding level (p < 0.01; FDR < 0.05). Elevated T3 may indicate that general metabolism was affected by diet and GHR (p < 0.01) and IGF1 (p < 0.04) mRNA expression were both greater in the liver of FF hens as compared to RF hens. It is likely that selection for increased growth, associated with enhanced activity of the IGF1 system, has altered nutritional coupling of feed intake to follicle development.
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Affiliation(s)
- C S Stephens
- Department of Animal Science, Cornell University, Ithaca, NY, USA
| | - A Hill-Ricciuti
- Department of Animal Science, Cornell University, Ithaca, NY, USA
| | - L Francoeur
- Department of Animal Science, Cornell University, Ithaca, NY, USA
| | - P A Johnson
- Department of Animal Science, Cornell University, Ithaca, NY, USA
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Bomer N, Pavez-Giani MG, Deiman FE, Linders AN, Hoes MF, Baierl CL, Oberdorf-Maass SU, de Boer RA, Silljé HH, Berezikov E, Simonides WS, Westenbrink BD, van der Meer P. Selenoprotein DIO2 Is a Regulator of Mitochondrial Function, Morphology and UPRmt in Human Cardiomyocytes. Int J Mol Sci 2021; 22:11906. [PMID: 34769334 PMCID: PMC8584701 DOI: 10.3390/ijms222111906] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 10/28/2021] [Accepted: 10/29/2021] [Indexed: 12/13/2022] Open
Abstract
Members of the fetal-gene-program may act as regulatory components to impede deleterious events occurring with cardiac remodeling, and constitute potential novel therapeutic heart failure (HF) targets. Mitochondrial energy derangements occur both during early fetal development and in patients with HF. Here we aim to elucidate the role of DIO2, a member of the fetal-gene-program, in pluripotent stem cell (PSC)-derived human cardiomyocytes and on mitochondrial dynamics and energetics, specifically. RNA sequencing and pathway enrichment analysis was performed on mouse cardiac tissue at different time points during development, adult age, and ischemia-induced HF. To determine the function of DIO2 in cardiomyocytes, a stable human hPSC-line with a DIO2 knockdown was made using a short harpin sequence. Firstly, we showed the selenoprotein, type II deiodinase (DIO2): the enzyme responsible for the tissue-specific conversion of inactive (T4) into active thyroid hormone (T3), to be a member of the fetal-gene-program. Secondly, silencing DIO2 resulted in an increased reactive oxygen species, impaired activation of the mitochondrial unfolded protein response, severely impaired mitochondrial respiration and reduced cellular viability. Microscopical 3D reconstruction of the mitochondrial network displayed substantial mitochondrial fragmentation. Summarizing, we identified DIO2 to be a member of the fetal-gene-program and as a key regulator of mitochondrial performance in human cardiomyocytes. Our results suggest a key position of human DIO2 as a regulator of mitochondrial function in human cardiomyocytes.
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Affiliation(s)
- Nils Bomer
- Department of Cardiology, University Medical Centre Groningen, University of Groningen, P.O. Box 30.001, 9700 RB Groningen, The Netherlands; (M.G.P.-G.); (F.E.D.); (A.N.L.); (M.F.H.); (C.L.J.B.); (S.U.O.-M.); (R.A.d.B.); (H.H.W.S.); (B.D.W.); (P.v.d.M.)
| | - Mario G. Pavez-Giani
- Department of Cardiology, University Medical Centre Groningen, University of Groningen, P.O. Box 30.001, 9700 RB Groningen, The Netherlands; (M.G.P.-G.); (F.E.D.); (A.N.L.); (M.F.H.); (C.L.J.B.); (S.U.O.-M.); (R.A.d.B.); (H.H.W.S.); (B.D.W.); (P.v.d.M.)
| | - Frederik E. Deiman
- Department of Cardiology, University Medical Centre Groningen, University of Groningen, P.O. Box 30.001, 9700 RB Groningen, The Netherlands; (M.G.P.-G.); (F.E.D.); (A.N.L.); (M.F.H.); (C.L.J.B.); (S.U.O.-M.); (R.A.d.B.); (H.H.W.S.); (B.D.W.); (P.v.d.M.)
| | - Annet N. Linders
- Department of Cardiology, University Medical Centre Groningen, University of Groningen, P.O. Box 30.001, 9700 RB Groningen, The Netherlands; (M.G.P.-G.); (F.E.D.); (A.N.L.); (M.F.H.); (C.L.J.B.); (S.U.O.-M.); (R.A.d.B.); (H.H.W.S.); (B.D.W.); (P.v.d.M.)
| | - Martijn F. Hoes
- Department of Cardiology, University Medical Centre Groningen, University of Groningen, P.O. Box 30.001, 9700 RB Groningen, The Netherlands; (M.G.P.-G.); (F.E.D.); (A.N.L.); (M.F.H.); (C.L.J.B.); (S.U.O.-M.); (R.A.d.B.); (H.H.W.S.); (B.D.W.); (P.v.d.M.)
| | - Christiane L.J. Baierl
- Department of Cardiology, University Medical Centre Groningen, University of Groningen, P.O. Box 30.001, 9700 RB Groningen, The Netherlands; (M.G.P.-G.); (F.E.D.); (A.N.L.); (M.F.H.); (C.L.J.B.); (S.U.O.-M.); (R.A.d.B.); (H.H.W.S.); (B.D.W.); (P.v.d.M.)
| | - Silke U. Oberdorf-Maass
- Department of Cardiology, University Medical Centre Groningen, University of Groningen, P.O. Box 30.001, 9700 RB Groningen, The Netherlands; (M.G.P.-G.); (F.E.D.); (A.N.L.); (M.F.H.); (C.L.J.B.); (S.U.O.-M.); (R.A.d.B.); (H.H.W.S.); (B.D.W.); (P.v.d.M.)
| | - Rudolf A. de Boer
- Department of Cardiology, University Medical Centre Groningen, University of Groningen, P.O. Box 30.001, 9700 RB Groningen, The Netherlands; (M.G.P.-G.); (F.E.D.); (A.N.L.); (M.F.H.); (C.L.J.B.); (S.U.O.-M.); (R.A.d.B.); (H.H.W.S.); (B.D.W.); (P.v.d.M.)
| | - Herman H.W. Silljé
- Department of Cardiology, University Medical Centre Groningen, University of Groningen, P.O. Box 30.001, 9700 RB Groningen, The Netherlands; (M.G.P.-G.); (F.E.D.); (A.N.L.); (M.F.H.); (C.L.J.B.); (S.U.O.-M.); (R.A.d.B.); (H.H.W.S.); (B.D.W.); (P.v.d.M.)
| | - Eugene Berezikov
- European Research Institute for the Biology of Ageing (ERIBA), University Medical Centre Groningen, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands;
| | - Warner S. Simonides
- Department of Physiology, Amsterdam University Medical Centre, Vrije Unversiteit Amsterdam, 1081 HV Amsterdam, The Netherlands;
| | - B. Daan Westenbrink
- Department of Cardiology, University Medical Centre Groningen, University of Groningen, P.O. Box 30.001, 9700 RB Groningen, The Netherlands; (M.G.P.-G.); (F.E.D.); (A.N.L.); (M.F.H.); (C.L.J.B.); (S.U.O.-M.); (R.A.d.B.); (H.H.W.S.); (B.D.W.); (P.v.d.M.)
| | - Peter van der Meer
- Department of Cardiology, University Medical Centre Groningen, University of Groningen, P.O. Box 30.001, 9700 RB Groningen, The Netherlands; (M.G.P.-G.); (F.E.D.); (A.N.L.); (M.F.H.); (C.L.J.B.); (S.U.O.-M.); (R.A.d.B.); (H.H.W.S.); (B.D.W.); (P.v.d.M.)
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Abstract
Deiodinases modify the biological activity of thyroid hormone (TH) molecules, ie, they may activate thyroxine (T4) to 3,5,3'-triiodothyronine (T3), or they may inactivate T3 to 3,3'-diiodo-L-thyronine (T2) or T4 to reverse triiodothyronine (rT3). Although evidence of deiodination of T4 to T3 has been available since the 1950s, objective evidence of TH metabolism was not established until the 1970s. The modern paradigm considers that the deiodinases not only play a role in the homeostasis of circulating T3, but they also provide dynamic control of TH signaling: cells that express the activating type 2 deiodinase (D2) have enhanced TH signaling due to intracellular build-up of T3; the opposite is seen in cells that express type 3 deiodinase (D3), the inactivating deiodinase. D2 and D3 are expressed in metabolically relevant tissues such as brown adipose tissue, skeletal muscle and liver, and their roles have been investigated using cell, animal, and human models. During development, D2 and D3 expression customize for each tissue/organ the timing and intensity of TH signaling. In adult cells, D2 is induced by cyclic adenosine monophosphate (cAMP), and its expression is invariably associated with enhanced T3 signaling, expression of PGC1 and accelerated energy expenditure. In contrast, D3 expression is induced by hypoxia-inducible factor 1α (HIF-1a), dampening T3 signaling and the metabolic rate. The coordinated expression of these enzymes adjusts TH signaling in a time- and tissue-specific fashion, affecting metabolic pathways in health and disease states.
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Affiliation(s)
- Samuel C Russo
- Section of Endocrinology, Diabetes & Metabolism, University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Federico Salas-Lucia
- Section of Endocrinology, Diabetes & Metabolism, University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Antonio C Bianco
- Section of Endocrinology, Diabetes & Metabolism, University of Chicago Medical Center, Chicago, IL 60637, USA
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Abstract
Hypothyroidism is a highly prevalent endocrine complication in chronic kidney disease (CKD) patients. A large body of evidence has shown that there is a bidirectional relationship between thyroid dysfunction and kidney disease, yet there are many remaining gaps in knowledge in regards to the clinical management of CKD patients with hypothyroidism, including those receiving hemodialysis and peritoneal dialysis. Given that hypothyroidism has been associated with many deleterious outcomes including a higher risk of (1) mortality, (2) cardiovascular disease, (3) impaired health-related quality of life, and (4) altered body composition in both non-CKD and CKD patients, future research is needed to establish the appropriate screening, diagnosis, and treatment approaches in these populations.
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Affiliation(s)
- Yoko Narasaki
- Harold Simmons Center for Chronic Disease Research and Epidemiology, Division of Nephrology, Hypertension and Kidney Transplantation, University of California Irvine, Orange, CA
| | - Peter Sohn
- Harold Simmons Center for Chronic Disease Research and Epidemiology, Division of Nephrology, Hypertension and Kidney Transplantation, University of California Irvine, Orange, CA
| | - Connie M Rhee
- Harold Simmons Center for Chronic Disease Research and Epidemiology, Division of Nephrology, Hypertension and Kidney Transplantation, University of California Irvine, Orange, CA.
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10
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Jonklaas J, Bianco AC, Cappola AR, Celi FS, Fliers E, Heuer H, McAninch EA, Moeller LC, Nygaard B, Sawka AM, Watt T, Dayan CM. Evidence-Based Use of Levothyroxine/Liothyronine Combinations in Treating Hypothyroidism: A Consensus Document. Eur Thyroid J 2021; 10:10-38. [PMID: 33777817 PMCID: PMC7983670 DOI: 10.1159/000512970] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Accepted: 11/11/2020] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Fourteen clinical trials have not shown a consistent benefit of combination therapy with levothyroxine (LT4) and liothyronine (LT3). Despite the publication of these trials, combination therapy is widely used and patients reporting benefit continue to generate patient and physician interest in this area. Recent scientific developments may provide insight into this inconsistency and guide future studies. METHODS The American Thyroid Association (ATA), British Thyroid Association (BTA), and European Thyroid Association (ETA) held a joint conference on November 3, 2019 (live-streamed between Chicago and London) to review new basic science and clinical evidence regarding combination therapy with presentations and input from 12 content experts. After the presentations, the material was synthesized and used to develop Summary Statements of the current state of knowledge. After review and revision of the material and Summary Statements, there was agreement that there was equipoise for a new clinical trial of combination therapy. Consensus Statements encapsulating the implications of the material discussed with respect to the design of future clinical trials of LT4/LT3 combination therapy were generated. Authors voted upon the Consensus Statements. Iterative changes were made in several rounds of voting and after comments from ATA/BTA/ETA members. RESULTS Of 34 Consensus Statements available for voting, 28 received at least 75% agreement, with 13 receiving 100% agreement. Those with 100% agreement included studies being powered to study the effect of deiodinase and thyroid hormone transporter polymorphisms on study outcomes, inclusion of patients dissatisfied with their current therapy and requiring at least 1.2 µg/kg of LT4 daily, use of twice daily LT3 or preferably a slow-release preparation if available, use of patient-reported outcomes as a primary outcome (measured by a tool with both relevant content validity and responsiveness) and patient preference as a secondary outcome, and utilization of a randomized placebo-controlled adequately powered double-blinded parallel design. The remaining statements are presented as potential additional considerations. DISCUSSION This article summarizes the areas discussed and presents Consensus Statements to guide development of future clinical trials of LT4/LT3 combination therapy. The results of such redesigned trials are expected to be of benefit to patients and of value to inform future thyroid hormone replacement clinical practice guidelines treatment recommendations.
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Affiliation(s)
- Jacqueline Jonklaas
- Division of Endocrinology, Georgetown University, Washington, District of Columbia, USA
- *Jacqueline Jonklaas, Division of Endocrinology, Georgetown University, 4000 Reservoir Road, NW, Washington, DC 20007 (USA),
| | - Antonio C. Bianco
- Section of Adult and Pediatric Endocrinology and Metabolism, University of Chicago, Chicago, Illinois, USA
| | - Anne R. Cappola
- Division of Endocrinology, Diabetes, and Metabolism, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Francesco S. Celi
- Division of Endocrinology, Diabetes and Metabolism, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Eric Fliers
- Department of Endocrinology and Metabolism, Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam University Medical Center, Amsterdam, The Netherlands
| | - Heike Heuer
- Department of Endocrinology, Diabetes and Metabolism, University Duisburg-Essen, Essen, Germany
| | | | - Lars C. Moeller
- Department of Endocrinology, Diabetes and Metabolism, University Duisburg-Essen, Essen, Germany
| | - Birte Nygaard
- Center for Endocrinology and Metabolism, Department of Internal Medicine, Herlev and Gentofte Hospitals, Herlev, Denmark
| | - Anna M. Sawka
- Division of Endocrinology, University Health Network and University of Toronto, Toronto, Ontario, Canada
| | - Torquil Watt
- Department of Endocrinology, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Colin M. Dayan
- Thyroid Research Group, School of Medicine, Cardiff University, Cardiff, United Kingdom
- **Colin M. Dayan, Thyroid Research Group, School of Medicine, Cardiff University, C2 Link, Heath Park, Cardiff CF14 4XN (UK),
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Jonklaas J, Bianco AC, Cappola AR, Celi FS, Fliers E, Heuer H, McAninch EA, Moeller LC, Nygaard B, Sawka AM, Watt T, Dayan CM. Evidence-Based Use of Levothyroxine/Liothyronine Combinations in Treating Hypothyroidism: A Consensus Document. Thyroid 2021; 31:156-182. [PMID: 33276704 PMCID: PMC8035928 DOI: 10.1089/thy.2020.0720] [Citation(s) in RCA: 66] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Background: Fourteen clinical trials have not shown a consistent benefit of combination therapy with levothyroxine (LT4) and liothyronine (LT3). Despite the publication of these trials, combination therapy is widely used and patients reporting benefit continue to generate patient and physician interest in this area. Recent scientific developments may provide insight into this inconsistency and guide future studies. Methods: The American Thyroid Association (ATA), British Thyroid Association (BTA), and European Thyroid Association (ETA) held a joint conference on November 3, 2019 (live-streamed between Chicago and London) to review new basic science and clinical evidence regarding combination therapy with presentations and input from 12 content experts. After the presentations, the material was synthesized and used to develop Summary Statements of the current state of knowledge. After review and revision of the material and Summary Statements, there was agreement that there was equipoise for a new clinical trial of combination therapy. Consensus Statements encapsulating the implications of the material discussed with respect to the design of future clinical trials of LT4/LT3 combination therapy were generated. Authors voted upon the Consensus Statements. Iterative changes were made in several rounds of voting and after comments from ATA/BTA/ETA members. Results: Of 34 Consensus Statements available for voting, 28 received at least 75% agreement, with 13 receiving 100% agreement. Those with 100% agreement included studies being powered to study the effect of deiodinase and thyroid hormone transporter polymorphisms on study outcomes, inclusion of patients dissatisfied with their current therapy and requiring at least 1.2 μg/kg of LT4 daily, use of twice daily LT3 or preferably a slow-release preparation if available, use of patient-reported outcomes as a primary outcome (measured by a tool with both relevant content validity and responsiveness) and patient preference as a secondary outcome, and utilization of a randomized placebo-controlled adequately powered double-blinded parallel design. The remaining statements are presented as potential additional considerations. Discussion: This article summarizes the areas discussed and presents Consensus Statements to guide development of future clinical trials of LT4/LT3 combination therapy. The results of such redesigned trials are expected to be of benefit to patients and of value to inform future thyroid hormone replacement clinical practice guidelines treatment recommendations.
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Affiliation(s)
- Jacqueline Jonklaas
- Division of Endocrinology, Georgetown University, Washington, District of Columbia, USA
- Address correspondence to: Jacqueline Jonklaas, MD, PhD, Division of Endocrinology, Georgetown University, 4000 Reservoir Road, NW, Washington, DC 20007, USA
| | - Antonio C. Bianco
- Section of Adult and Pediatric Endocrinology and Metabolism, University of Chicago, Chicago, Illinois, USA
| | - Anne R. Cappola
- Division of Endocrinology, Diabetes, and Metabolism, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Francesco S. Celi
- Division of Endocrinology, Diabetes and Metabolism, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Eric Fliers
- Department of Endocrinology and Metabolism, Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam University Medical Center, Netherlands
| | - Heike Heuer
- Department of Endocrinology, Diabetes and Metabolism, University Duisburg-Essen, Essen, Germany
| | | | - Lars C. Moeller
- Department of Endocrinology, Diabetes and Metabolism, University Duisburg-Essen, Essen, Germany
| | - Birte Nygaard
- Center for Endocrinology and Metabolism, Department Internal Medicine, Herlev and Gentofte Hospitals, Herlev, Denmark
| | - Anna M. Sawka
- Division of Endocrinology, University Health Network and University of Toronto, Toronto, Canada
| | - Torquil Watt
- Department of Endocrinology, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark
| | - Colin M. Dayan
- Thyroid Research Group, School of Medicine, Cardiff University, Cardiff, United Kingdom
- Address correspondence to: Colin M. Dayan, MD, PhD, Thyroid Research Group, School of Medicine, Cardiff University, C2 Link, Heath Park, Cardiff CF14 4XN, UK
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Goodarzi-Khoigani M, Mardanian F, Mazloomy Mahmoodabad S, Baghiani Moghadam M, Nadjarzadeh A, Feizi A, Allameh Z, Molavi S. The association between serum TSH concentration whithin the normal range and nutritional status in euthyroid pregnant women at the first trimester of gestation. JOURNAL OF RESEARCH IN MEDICAL SCIENCES 2021; 26:93. [PMID: 34899931 PMCID: PMC8607178 DOI: 10.4103/jrms.jrms_780_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Revised: 12/23/2020] [Accepted: 05/24/2021] [Indexed: 11/04/2022]
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Siddiqa A, Ahmad J, Ali A, Khan S. Deciphering the expression dynamics of ANGPTL8 associated regulatory network in insulin resistance using formal modelling approaches. IET Syst Biol 2020; 14:47-58. [PMID: 32196463 PMCID: PMC8687251 DOI: 10.1049/iet-syb.2019.0032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
ANGPTL8 is a recently identified novel hormone which regulates both glucose and lipid metabolism. The increase in ANGPTL8 during compensatory insulin resistance has been recently reported to improve glucose tolerance and a part of cytoprotective metabolic circuit. However, the exact signalling entities and dynamics involved in this process have remained elusive. Therefore, the current study was conducted with a specific aim to model the regulation of ANGPTL8 with emphasis on its role in improving glucose tolerance during insulin resistance. The main contribution of this study is the construction of a discrete model (based on kinetic logic of René Thomas) and its equivalent Stochastic Petri Net model of ANGPTL8 associated Biological Regulatory Network (BRN) which can predict its dynamic behaviours. The predicted results of these models are in‐line with the previous experimental observations and provide comprehensive insights into the signalling dynamics of ANGPTL8 associated BRN. The authors’ results support the hypothesis that ANGPTL8 plays an important role in supplementing the insulin signalling pathway during insulin resistance and its loss can aggravate the pathogenic process by quickly leading towards Diabetes Mellitus. The results of this study have potential therapeutic implications for treatment of Diabetes Mellitus and are suggestive of its potential as a glucose‐lowering agent.
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Affiliation(s)
- Amnah Siddiqa
- Research Center for Modelling and Simulation (RCMS), National university of Sciences and Technology (NUST), Sector H-12, Islamabad 46000, Pakistan
| | - Jamil Ahmad
- Department of Computer Science and Information Technology, University of Malakand, Chakdara, Dir Lower, Khyber Pakhtunkhwa 18800, Pakistan.
| | - Amjad Ali
- Atta-ur-Rahman School of Applied Biosciences (ASAB), National University of Sciences and Technology (NUST), Sector H-12, Islamabad 46000, Pakistan
| | - Sharifullah Khan
- School of Electrical Engineering and Computer Science (SEECS), National University of Sciences and Technology (NUST), Pakistan
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Weidner J, Jensen CH, Giske J, Eliassen S, Jørgensen C. Hormones as adaptive control systems in juvenile fish. Biol Open 2020; 9:bio046144. [PMID: 31996351 PMCID: PMC7044463 DOI: 10.1242/bio.046144] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Accepted: 01/13/2020] [Indexed: 12/11/2022] Open
Abstract
Growth is an important theme in biology. Physiologists often relate growth rates to hormonal control of essential processes. Ecologists often study growth as a function of gradients or combinations of environmental factors. Fewer studies have investigated the combined effects of environmental and hormonal control on growth. Here, we present an evolutionary optimization model of fish growth that combines internal regulation of growth by hormone levels with the external influence of food availability and predation risk. The model finds a dynamic hormone profile that optimizes fish growth and survival up to 30 cm, and we use the probability of reaching this milestone as a proxy for fitness. The complex web of interrelated hormones and other signalling molecules is simplified to three functions represented by growth hormone, thyroid hormone and orexin. By studying a range from poor to rich environments, we find that the level of food availability in the environment results in different evolutionarily optimal strategies of hormone levels. With more food available, higher levels of hormones are optimal, resulting in higher food intake, standard metabolism and growth. By using this fitness-based approach we also find a consequence of evolutionary optimization of survival on optimal hormone use. Where foraging is risky, the thyroid hormone can be used strategically to increase metabolic potential and the chance of escaping from predators. By comparing model results to empirical observations, many mechanisms can be recognized, for instance a change in pace-of-life due to resource availability, and reduced emphasis on reserves in more stable environments.This article has an associated First Person interview with the first author of the paper.
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Affiliation(s)
- Jacqueline Weidner
- University of Bergen, Department of Biological Sciences, Postboks 7803, N-5020 Bergen, Norway
| | | | - Jarl Giske
- University of Bergen, Department of Biological Sciences, Postboks 7803, N-5020 Bergen, Norway
| | - Sigrunn Eliassen
- University of Bergen, Department of Biological Sciences, Postboks 7803, N-5020 Bergen, Norway
| | - Christian Jørgensen
- University of Bergen, Department of Biological Sciences, Postboks 7803, N-5020 Bergen, Norway
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McKeever L, Peterson SJ, Lateef O, Freels S, Fonseca TL, Bocco BMLC, Fernandes GW, Roehl K, Nowak K, Mozer M, Bianco AC, Braunschweig CA. Higher Caloric Exposure in Critically Ill Patients Transiently Accelerates Thyroid Hormone Activation. J Clin Endocrinol Metab 2020; 105:5580691. [PMID: 31581295 PMCID: PMC9633328 DOI: 10.1210/clinem/dgz077] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 09/27/2019] [Indexed: 11/19/2022]
Abstract
INTRODUCTION The inflammatory response of critical illness is accompanied by nonthyroidal illness syndrome (NTIS). Feeding has been shown to attenuate this process, but this has not been explored prospectively over time in critically ill patients. OBJECTIVE To explore the impact of calorie exposure on NTIS over time in critically ill patients. METHODS Mechanically ventilated patients with systemic inflammatory response syndrome (SIRS) were randomized to receive either 100% or 40% of their estimated caloric needs (ECN). Thyroid hormones were measured daily for 7 days or until intensive care unit discharge or death. Mixed level regression modeling was used to explore the effect of randomization group on plasma triiodothyronine (T3), reverse triiodothyronine (rT3), thyroxine (T4), and thyroid stimulating hormone (TSH), as well as the T3/rT3 ratio. RESULTS Thirty-five participants (n=19 in 100% ECN; n=16 in 40% ECN) were recruited. Adjusting for group differences in baseline T3/rT3 ratio, the parameters defining the fitted curves (intercept, linear effect of study day, and quadratic effect of study day) differed by randomization group (P = 0.001, P = 0.01, and P = 0.02 respectively). Plots of the fitted curves revealed that participants in the 100% ECN group had a 54% higher T3/rT3 ratio on postintervention day 1 compared with the 40% ECN group, a difference which attenuated over time. This was driven by a 23% higher plasma T3 and 10% lower plasma rT3 levels on postintervention 1. CONCLUSIONS Higher caloric exposure in NTIS patients transiently attenuates the drop of the plasma T3/rT3 ratio, an effect that is minimized and finally lost over the following 3 days of continued higher caloric exposure.
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Affiliation(s)
| | - Sarah J Peterson
- Rush University Medical Center, Department of Clinical Nutrition, Chicago, Illinois
| | - Omar Lateef
- Rush University Medical Center, Department of Clinical Nutrition, Chicago, Illinois
| | - Sally Freels
- University of Illinois at Chicago, Department of Epidemiology and Biostatistics, Chicago, Illinois
| | - Tatiana L Fonseca
- University of Chicago Medical Center, Section of Adult and Pediatric Endocrinology, Diabetes and Metabolism, Chicago, Illinois
| | - Barbara M L C Bocco
- University of Chicago Medical Center, Section of Adult and Pediatric Endocrinology, Diabetes and Metabolism, Chicago, Illinois
| | - Gustavo W Fernandes
- University of Chicago Medical Center, Section of Adult and Pediatric Endocrinology, Diabetes and Metabolism, Chicago, Illinois
| | - Kelly Roehl
- Rush University Medical Center, Department of Clinical Nutrition, Chicago, Illinois
| | - Kristen Nowak
- Rush University Medical Center, Department of Clinical Nutrition, Chicago, Illinois
| | - Marisa Mozer
- Rush University Medical Center, Department of Clinical Nutrition, Chicago, Illinois
| | - Antonio C Bianco
- University of Chicago Medical Center, Section of Adult and Pediatric Endocrinology, Diabetes and Metabolism, Chicago, Illinois
| | - Carol A Braunschweig
- Correspondence: Carol A. Braunschweig, PhD, RD, Department of Kinesiology and Nutrition, University of Illinois at Chicago, 1919 W Taylor (m/c 517), Room 650, Chicago, IL 60612, USA. E-mail:
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Morelli MB, Chavez C, Santulli G. Angiopoietin-like proteins as therapeutic targets for cardiovascular disease: focus on lipid disorders. Expert Opin Ther Targets 2020; 24:79-88. [PMID: 31856617 DOI: 10.1080/14728222.2020.1707806] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Introduction: Angiopoietin-like (ANGPTL) proteins belong to a family of eight secreted factors that are structurally related to proteins that modulate angiogenesi, commonly known as angiopoietins. Specifically, ANGPTL3, ANGPTL4, and ANGPTL8 (the 'ANGPT L3-4-8 triad'), have surfaced as principal regulators of plasma lipid metabolism by functioning as potent inhibitors of lipoprotein lipase. The targeting of these proteins may open up future therapeutic avenues for metabolic and cardiovascular disease.Areas covered: This article systematically summarizes the compelling literature describing the mechanistic roles of ANGPTL3, 4, and 8 in lipid metabolism, emphasizing their importance in determining the risk of cardiovascular disease. We shed light on population-based studies linking loss-of-function variations in ANGPTL3, 4, and 8 with decreased risk of metabolic conditions and cardiovascular disorders. We also discuss how the strategies aiming at targeting the ANGPT L3-4-8 triad could offer therapeutic benefit in the clinical scenario.Expert opinion: Monoclonal antibodies and antisense oligonucleotides that target ANGPTL3, 4, and 8 are potentially an efficient therapeutic strategy for hypertriglyceridemia and cardiovascular risk reduction, especially in patients with limited treatment options. These innovative therapeutical approaches are at an embryonic stage in development and hence further investigations are necessary for eventual use in humans.
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Affiliation(s)
- Marco Bruno Morelli
- Department of Medicine; Wilf Family Cardiovascular Research Institute, Albert Einstein College of Medicine, New York, NY, USA.,Department of Molecular Pharmacology, Einstein-Mount Sinai Diabetes Research Center (ES-DRC), The "Norman Fleischer" Institute for Diabetes and Metabolism (FIDAM), Albert Einstein College of Medicine, NY, New York, USA
| | - Christopher Chavez
- Department of Medicine; Wilf Family Cardiovascular Research Institute, Albert Einstein College of Medicine, New York, NY, USA
| | - Gaetano Santulli
- Department of Medicine; Wilf Family Cardiovascular Research Institute, Albert Einstein College of Medicine, New York, NY, USA.,Department of Molecular Pharmacology, Einstein-Mount Sinai Diabetes Research Center (ES-DRC), The "Norman Fleischer" Institute for Diabetes and Metabolism (FIDAM), Albert Einstein College of Medicine, NY, New York, USA.,Department of Advanced Biomedical Sciences and International Translational Research and Medical Education Consortium (ITME), "Federico II" University, Naples, Italy
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Adipose Stem Cells from Lipedema and Control Adipose Tissue Respond Differently to Adipogenic Stimulation In Vitro. Plast Reconstr Surg 2020; 144:623-632. [PMID: 31461015 DOI: 10.1097/prs.0000000000005918] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Lipedema is characterized by localized accumulation of fat in the extremities, which is typically unresponsive to dietary regimens or physical activity. Although the disease is well described and has a high incidence, little is known regarding the molecular and cellular mechanisms underlying its pathogenesis. The aim of this study was to investigate the pathophysiology of lipedema adipose cells in vitro. METHODS Adipose-derived stem cells were isolated from lipoaspirates derived from lipedema and nonlipedema patients undergoing tumescent liposuction. In vitro differentiation studies were performed for up to 14 days using adipogenic or regular culture medium. Supernatants and cell lysates were tested for adiponectin, leptin, insulin-like growth factor-1, aromatase (CYP19A1), and interleukin-8 content at days 7 and 14, using enzyme-linked immunosorbent assays. Adipogenesis was evaluated by visualizing and measuring cytoplasmic lipid accumulation. RESULTS Lipedema adipose-derived stem cells showed impeded adipogenesis already at early stages of in vitro differentiation. Concomitant with a strongly reduced cytoplasmic lipid accumulation, significantly lower amounts of adiponectin and leptin were detectable in supernatants from lipedema adipose-derived stem cells and adipocytes compared with control cells. In addition, lipedema and nonlipedema cells differed in their expression of insulin-like growth factor-1, aromatase (CYP19A1), and interleukin-8 and in their proliferative activity. CONCLUSIONS The authors' findings indicate that in vitro adipogenesis of lipedema adipose-derived stem cells is severely hampered compared with nonlipedema adipose-derived stem cells. Lipedema adipose cells differ not only in their lipid storage capacity but also in their adipokine expression pattern. This might serve as a valuable marker for diagnosis of lipedema, probably from an early stage on.
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Zupo R, Castellana F, Sardone R, Lampignano L, Paradiso S, Giagulli VA, Triggiani V, Di Lorenzo L, Giannelli G, De Pergola G. Higher Muscle Mass Implies Increased Free-Thyroxine to Free-Triiodothyronine Ratio in Subjects With Overweight and Obesity. Front Endocrinol (Lausanne) 2020; 11:565065. [PMID: 33117281 PMCID: PMC7553046 DOI: 10.3389/fendo.2020.565065] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Accepted: 09/10/2020] [Indexed: 12/12/2022] Open
Abstract
UNLABELLED Thyroid hormones control both metabolic pathways and body composition, whereas little knowledge is available about the possible influence of skeletal muscle mass (MM) on thyroid hormone metabolism and circulating levels. This was a cross-sectional study conducted at the Population Health Unit of the National Institute of Gastroenterology IRCCS "S. de Bellis" (Italy) and investigating the extent to which skeletal MM affects thyroid function in obesity. Two hundred twenty-seven consecutive healthy volunteers (155 women and 72 men) with overweight and obesity (BMI ≥ 25 kg/m2) and taking no medication or supplement were assessed for hormone, metabolic and routine laboratory parameters. Body composition parameters were collected by using bioelectrical impedance analysis (BIA). MM was directly related to the body mass index (BMI), waist circumference (WC), insulin, triglycerides, uric acid and free-triiodothyronine (FT3) serum levels, FT3 to the free-thyroxine (FT4) ratio, and insulin-resistance (HOMA-IR), and inversely related to age, total, and HDL-cholesterol serum levels. Multiple regression models confirmed the relationship between MM and the FT3 to FT4 ratio, independently of age, BMI, TSH, triglycerides, and insulin serum levels. The same analyses run by gender showed that this relationship maintained significance only in men. Increased skeletal MM in obesity results in improved thyroid activity mediated by increased T4 conversion to T3, and higher FT3 circulating levels, particularly in men. In conclusion, preserving a greater skeletal MM in obesity helps to enhance thyroid activity. CLINICAL TRIAL REGISTRATION ClinicalTrials.gov, identifier NCT04327375.
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Affiliation(s)
- Roberta Zupo
- Population Health Unit – “Salus in Apulia Study”, National Institute of Gastroenterology “Saverio de Bellis”, Research Hospital, Bari, Italy
- *Correspondence: Roberta Zupo,
| | - Fabio Castellana
- Population Health Unit – “Salus in Apulia Study”, National Institute of Gastroenterology “Saverio de Bellis”, Research Hospital, Bari, Italy
| | - Rodolfo Sardone
- Population Health Unit – “Salus in Apulia Study”, National Institute of Gastroenterology “Saverio de Bellis”, Research Hospital, Bari, Italy
| | - Luisa Lampignano
- Population Health Unit – “Salus in Apulia Study”, National Institute of Gastroenterology “Saverio de Bellis”, Research Hospital, Bari, Italy
| | - Silvia Paradiso
- Clinical Nutrition Unit, Department of Biomedical Science and Human Oncology, University of Bari, School of Medicine, Policlinico, Bari, Italy
| | - Vito Angelo Giagulli
- Section of Internal Medicine, Geriatrics, Endocrinology and Rare Disease, Interdisciplinary Department of Medicine, School of Medicine, University of Bari, Bari, Italy
| | - Vincenzo Triggiani
- Section of Internal Medicine, Geriatrics, Endocrinology and Rare Disease, Interdisciplinary Department of Medicine, School of Medicine, University of Bari, Bari, Italy
| | - Luigi Di Lorenzo
- Dipartimento di Medicina Interna e Medicina Pubblica, Sezione di Medicina del Lavoro “E.C. Vigliani”, University of Bari, Policlinico, Bari, Italy
| | - Gianluigi Giannelli
- Scientific Direction, National Institute of Gastroenterology “Saverio de Bellis”, Research Hospital, Bari, Italy
| | - Giovanni De Pergola
- Population Health Unit – “Salus in Apulia Study”, National Institute of Gastroenterology “Saverio de Bellis”, Research Hospital, Bari, Italy
- Clinical Nutrition Unit, Department of Biomedical Science and Human Oncology, University of Bari, School of Medicine, Policlinico, Bari, Italy
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Chiofalo B, Fazio E, Cucinotta S, Cravana C. Thyroid and Lipid Status in Guide Dogs During Training: Effects of Dietary Protein and Fat Content. Animals (Basel) 2019; 9:ani9090597. [PMID: 31443579 PMCID: PMC6769750 DOI: 10.3390/ani9090597] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 08/16/2019] [Accepted: 08/19/2019] [Indexed: 02/06/2023] Open
Abstract
Nutrition plays a leading role that most influences thyroid response and energetic metabolism. Aim was to compare the effect of diet on thyroid and lipid status in guide dogs during a 12-weeks training period. Eight Labrador Retrievers were divided into two groups homogeneous for sex, age, body weight, and Body Condition Score (BCS) and fed two commercial diets one, HPF, characterized by low-carbohydrate/high-protein/high-fat (29%:39%:19% as-fed) and the other, LPF, by high-carbohydrate/low-protein/low-fat (50%:24%:12% as-fed) content. The serum thriiodothyronine (T3), thyroxine (T4), cholesterol (CHOL), triglycerides (TAGs) and non-esterified fatty acids (NEFA) were determined at Day 0, 28, 56, and 84, before the daily training. Statistical model included the effects of Diet (HPF vs. LPF) and Time (Day 0 to Day 84), and their interaction. In the HPF group, Diet significantly (p < 0.01) increased T4, CHOL, and TAGs and decreased NEFA. In both groups, Time significantly (p < 0.05) increased T4 and TAGs, CHOL at Day 28, and NEFA at Day 56. The interaction did not influence serum hormones and lipid pattern. The adjustments in thyroid and lipid responses to moderate exercise in HPF group were driven mainly by the nutrient composition of the diet in relation to the involvement of metabolic homeostasis.
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Affiliation(s)
- Biagina Chiofalo
- Department of Veterinary Sciences, University of Messina, Polo Universitario Annunziata, 98168 Messina, Italy.
| | - Esterina Fazio
- Department of Veterinary Sciences, University of Messina, Polo Universitario Annunziata, 98168 Messina, Italy
| | - Salvatore Cucinotta
- Department of Veterinary Sciences, University of Messina, Polo Universitario Annunziata, 98168 Messina, Italy
| | - Cristina Cravana
- Department of Veterinary Sciences, University of Messina, Polo Universitario Annunziata, 98168 Messina, Italy
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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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The Foxo1-Inducible Transcriptional Repressor Zfp125 Causes Hepatic Steatosis and Hypercholesterolemia. Cell Rep 2019; 22:523-534. [PMID: 29320745 DOI: 10.1016/j.celrep.2017.12.053] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Revised: 11/15/2017] [Accepted: 12/15/2017] [Indexed: 12/21/2022] Open
Abstract
Liver-specific disruption of the type 2 deiodinase gene (Alb-D2KO) results in resistance to both diet-induced obesity and liver steatosis in mice. Here, we report that this is explained by an ∼60% reduction in liver zinc-finger protein-125 (Zfp125) expression. Zfp125 is a Foxo1-inducible transcriptional repressor that causes lipid accumulation in the AML12 mouse hepatic cell line and liver steatosis in mice by reducing liver secretion of triglycerides and hepatocyte efflux of cholesterol. Zfp125 acts by repressing 18 genes involved in lipoprotein structure, lipid binding, and transport. The ApoE promoter contains a functional Zfp125-binding element that is also present in 17 other lipid-related genes repressed by Zfp125. While liver-specific knockdown of Zfp125 causes an "Alb-D2KO-like" metabolic phenotype, liver-specific normalization of Zfp125 expression in Alb-D2KO mice rescues the phenotype, restoring normal susceptibility to diet-induced obesity, liver steatosis, and hypercholesterolemia.
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22
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Ylli D, Wartofsky L. Can We Link Thyroid Status, Energy Expenditure, and Body Composition to Management of Subclinical Thyroid Dysfunction? J Clin Endocrinol Metab 2019; 104:209-212. [PMID: 30247562 DOI: 10.1210/jc.2018-01997] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Accepted: 09/17/2018] [Indexed: 01/07/2023]
Abstract
We discuss the study of Samuels et al., focusing on the effect that levothyroxine treatment has on energy expenditure and body composition in subclinical hypothyroidism.
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Affiliation(s)
- Dorina Ylli
- MedStar Health Research Institute, Washington, District of Columbia
| | - Leonard Wartofsky
- Department of Medicine, Medstar Washington Hospital Center, Georgetown University, Washington, District of Columbia
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23
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Goemann IM, Marczyk VR, Romitti M, Wajner SM, Maia AL. Current concepts and challenges to unravel the role of iodothyronine deiodinases in human neoplasias. Endocr Relat Cancer 2018; 25:R625-R645. [PMID: 30400023 DOI: 10.1530/erc-18-0097] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 07/10/2018] [Indexed: 12/20/2022]
Abstract
Thyroid hormones (THs) are essential for the regulation of several metabolic processes and the energy consumption of the organism. Their action is exerted primarily through interaction with nuclear receptors controlling the transcription of thyroid hormone-responsive genes. Proper regulation of TH levels in different tissues is extremely important for the equilibrium between normal cellular proliferation and differentiation. The iodothyronine deiodinases types 1, 2 and 3 are key enzymes that perform activation and inactivation of THs, thus controlling TH homeostasis in a cell-specific manner. As THs seem to exert their effects in all hallmarks of the neoplastic process, dysregulation of deiodinases in the tumoral context can be critical to the neoplastic development. Here, we aim at reviewing the deiodinases expression in different neoplasias and exploit the mechanisms by which they play an essential role in human carcinogenesis. TH modulation by deiodinases and other classical pathways may represent important targets with the potential to oppose the neoplastic process.
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Affiliation(s)
- Iuri Martin Goemann
- Thyroid Unit, Endocrine Division, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Vicente Rodrigues Marczyk
- Thyroid Unit, Endocrine Division, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Mirian Romitti
- Institut de Recherche Interdisciplinaire en Biologie Humaine et Moléculaire, Université Libre de Bruxelles, Brussels, Belgium
| | - Simone Magagnin Wajner
- Thyroid Unit, Endocrine Division, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Ana Luiza Maia
- Thyroid Unit, Endocrine Division, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
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Samuels MH, Kolobova I, Niederhausen M, Purnell JQ, Schuff KG. Effects of Altering Levothyroxine Dose on Energy Expenditure and Body Composition in Subjects Treated With LT4. J Clin Endocrinol Metab 2018; 103:4163-4175. [PMID: 30165520 PMCID: PMC6194808 DOI: 10.1210/jc.2018-01203] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Accepted: 08/21/2018] [Indexed: 01/14/2023]
Abstract
Background It is unclear whether variations in thyroid status within or near the reference range affect energy expenditure, body mass, or body composition. Methods 138 subjects treated with levothyroxine (LT4) for hypothyroidism with normal TSH levels underwent measurement of total, resting, and physical activity energy expenditure; thermic effect of food; substrate oxidation; dietary intake; and body composition. They were assigned to receive an unchanged, higher, or lower LT4 dose in randomized, double-blind fashion, targeting one of three TSH ranges (0.34 to 2.50, 2.51 to 5.60, or 5.61 to 12.0 mU/L). The doses were adjusted every 6 weeks to achieve target TSH levels. Baseline measures were reassessed at 6 months. Results At study end, the mean LT4 doses and TSH levels were 1.50 ± 0.07, 1.32 ± 0.07, and 0.78 ± 0.08 µg/kg (P < 0.001) and 1.85 ± 0.25, 3.93 ± 0.38, and 9.49 ± 0.80 mU/L (P < 0.001), respectively, in the three arms. No substantial metabolic differences in outcome were found among the three arms, although direct correlations were observed between decreases in thyroid status and decreases in resting energy expenditure for all subjects. The subjects could not ascertain how their LT4 dose had been adjusted but the preferred LT4 dose they perceived to be higher (P < 0.001). Conclusions Altering LT4 doses in subjects with hypothyroidism to vary TSH levels in and near the reference range did not have major effects on energy expenditure or body composition. Subjects treated with LT4 preferred the perceived higher LT4 doses despite a lack of objective effect. Our data do not support adjusting LT4 doses in patients with hypothyroidism to achieve potential improvements in weight or body composition.
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Affiliation(s)
- Mary H Samuels
- Division of Endocrinology, Diabetes and Clinical Nutrition, Oregon Health & Science University, Portland, Oregon
| | - Irina Kolobova
- Family and Community Medicine Residency Program, Penn State Health St. Joseph, Reading, Pennsylvania
| | - Meike Niederhausen
- Biostatistics and Design Program, OHSU-PSU School of Public Health, Oregon Health & Science University, Portland, Oregon
| | - Jonathan Q Purnell
- Knight Cardiovascular Institute, Division of Endocrinology, Diabetes and Clinical Nutrition, Oregon Health & Science University, Portland, Oregon
| | - Kathryn G Schuff
- Division of Endocrinology, Diabetes and Clinical Nutrition, Oregon Health & Science University, Portland, Oregon
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Lundbäck V, Ekbom K, Hagman E, Dahlman I, Marcus C. Thyroid-Stimulating Hormone, Degree of Obesity, and Metabolic Risk Markers in a Cohort of Swedish Children with Obesity. Horm Res Paediatr 2018; 88:140-146. [PMID: 28614818 DOI: 10.1159/000475993] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Accepted: 04/18/2017] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND/AIMS Thyroid-stimulating hormone (TSH) is affected in obesity and might influence metabolic risk. It is unclear what mechanisms cause elevated TSH in obesity. We aimed to investigate TSH status within the normal range and the association of TSH with degree of obesity and metabolic parameters in children with obesity. METHODS A total of 3,459 children, aged 3.0-17.9 years, were identified in the Swedish Childhood Obesity Treatment Registry, BORIS. Age, gender, TSH, free triiodothyronine (fT3), free thyroxine (fT4), body mass index standard deviation scores (BMI SDS), as well as variables of lipid and glucose metabolism were examined. RESULTS Children with high-normal TSH (>3.0 mU/L) (28.8%) had higher BMI SDS compared to children with low-normal TSH (<3.0 mU/L) (p < 0.001). Multivariable regression analysis adjusted for age and gender showed that TSH levels were associated with BMI SDS (β: 0.21, 95% CI: 0.14-0.28, p < 0.001). Associations of thyroid hormones with markers of lipid and glucose metabolism were observed, where TSH was associated with fasting insulin, HOMA (homeostatic model assessment of insulin resistance), total cholesterol, and triglycerides. CONCLUSIONS A positive association between TSH levels and BMI SDS was seen in children with obesity. Associations of TSH and free thyroid hormones with glucose metabolism indicated that TSH might be one of several factors acting to determine body weight and obesity co-morbidities, although the underlying mechanism remains unclear.
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Affiliation(s)
- Veroniqa Lundbäck
- Division of Pediatrics, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - Kerstin Ekbom
- Division of Pediatrics, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - Emilia Hagman
- Division of Pediatrics, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - Ingrid Dahlman
- Department of Medicine, Huddinge, Karolinska Institutet, Stockholm, Sweden
| | - Claude Marcus
- Division of Pediatrics, Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
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Abstract
Thyroid hormone signaling is customized in a time and cell-specific manner by the deiodinases, homodimeric thioredoxin fold containing selenoproteins. This ensures adequate T3 action in developing tissues, healthy adults and many disease states. D2 activates thyroid hormone by converting the pro-hormone T4 to T3, the biologically active thyroid hormone. D2 expression is tightly regulated by transcriptional mechanisms triggered by endogenous as well as environmental cues. There is also an on/off switch mechanism that controls D2 activity that is triggered by catalysis and functions via D2 ubiquitination/deubiquitination. D3 terminates thyroid hormone action by inactivation of both T4 and T3 molecules. Deiodinases play a role in thyroid hormone homeostasis, development, growth and metabolic control by affecting the intracellular levels of T3 and thus gene expression on a cell-specific basis. In many cases, tight control of these pathways by T3 is achieved with coordinated reciprocal changes in D2-mediated thyroid hormone activation D3-mediated thyroid hormone inactivation.
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27
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Pałkowska-Goździk E, Lachowicz K, Rosołowska-Huszcz D. Effects of Dietary Protein on Thyroid Axis Activity. Nutrients 2017; 10:nu10010005. [PMID: 29271877 PMCID: PMC5793233 DOI: 10.3390/nu10010005] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 12/08/2017] [Accepted: 12/18/2017] [Indexed: 02/06/2023] Open
Abstract
Thyroid hormones (TH) are essential for the normal development and function of every vertebrate. The hypothalamic-pituitary-thyroid (HPT) axis is regulated to maintain euthyroid status. One of the most influential environmental factors that determines HPT axis activity is nutrition. Both food availability and substrate diversity affect thyroid hormone economy. The present paper aims to summarize literature data concerning the influence of the amount and the type of protein on thyroid axis activity. This review sheds light on the contribution of a low-protein diet or insufficient intake of essential amino acids to TH abnormalities. We believe that the knowledge of these dependencies could improve the results of nutritional interventions in thyroid axis disorders and enhance the efficiency of animal breeding.
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Affiliation(s)
- Ewelina Pałkowska-Goździk
- Department of Dietetics, Faculty of Human Nutrition and Consumer Sciences, Warsaw University of Life Sciences WULS-SGGW, 159c Nowoursynowska Str., 02-776 Warsaw, Poland.
| | - Katarzyna Lachowicz
- Department of Dietetics, Faculty of Human Nutrition and Consumer Sciences, Warsaw University of Life Sciences WULS-SGGW, 159c Nowoursynowska Str., 02-776 Warsaw, Poland.
| | - Danuta Rosołowska-Huszcz
- Department of Dietetics, Faculty of Human Nutrition and Consumer Sciences, Warsaw University of Life Sciences WULS-SGGW, 159c Nowoursynowska Str., 02-776 Warsaw, Poland.
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28
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Siddiqa A, Cirillo E, Tareen SHK, Ali A, Kutmon M, Eijssen LMT, Ahmad J, Evelo CT, Coort SL. Visualizing the regulatory role of Angiopoietin-like protein 8 (ANGPTL8) in glucose and lipid metabolic pathways. Genomics 2017; 109:408-418. [PMID: 28684091 DOI: 10.1016/j.ygeno.2017.06.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Revised: 06/19/2017] [Accepted: 06/20/2017] [Indexed: 01/23/2023]
Abstract
ANGPTL8 (Angiopoietin-like protein 8) is a newly identified hormone emerging as a novel drug target for treatment of diabetes mellitus and dyslipidemia due to its unique metabolic nature. With increasing number of studies targeting the regulation of ANGPTL8, integration of their findings becomes indispensable. This study has been conducted with the aim to collect, analyze, integrate and visualize the available knowledge in the literature about ANGPTL8 and its regulation. We utilized this knowledge to construct a regulatory pathway of ANGPTL8 which is available at WikiPathways, an open source pathways database. It allows us to visualize ANGPTL8's regulation with respect to other genes/proteins in different pathways helping us to understand the complex interplay of novel hormones/genes/proteins in metabolic disorders. To the best of our knowledge, this is the first attempt to present an integrated pathway view of ANGPTL8's regulation and its associated pathways and is important resource for future omics-based studies.
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Affiliation(s)
- Amnah Siddiqa
- Research Centre for Modeling and Simulation - RCMS, National University of Sciences and Technology, Pakistan; Department of Bioinformatics - BiGCaT, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University, The Netherlands
| | - Elisa Cirillo
- Department of Bioinformatics - BiGCaT, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University, The Netherlands
| | - Samar H K Tareen
- Maastricht Centre for Systems Biology (MaCSBio), Maastricht University, The Netherlands
| | - Amjad Ali
- Atta-ur-Rahman School of Applied Biosciences - ASAB, National University of Sciences and Technology, Pakistan
| | - Martina Kutmon
- Department of Bioinformatics - BiGCaT, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University, The Netherlands; Maastricht Centre for Systems Biology (MaCSBio), Maastricht University, The Netherlands
| | - Lars M T Eijssen
- Department of Bioinformatics - BiGCaT, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University, The Netherlands
| | - Jamil Ahmad
- Research Centre for Modeling and Simulation - RCMS, National University of Sciences and Technology, Pakistan.
| | - Chris T Evelo
- Department of Bioinformatics - BiGCaT, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University, The Netherlands; Maastricht Centre for Systems Biology (MaCSBio), Maastricht University, The Netherlands
| | - Susan L Coort
- Department of Bioinformatics - BiGCaT, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University, The Netherlands
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Samuels MH, Kolobova I, Antosik M, Niederhausen M, Purnell JQ, Schuff KG. Thyroid Function Variation in the Normal Range, Energy Expenditure, and Body Composition in L-T4-Treated Subjects. J Clin Endocrinol Metab 2017; 102:2533-2542. [PMID: 28460140 PMCID: PMC5505196 DOI: 10.1210/jc.2017-00224] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 04/25/2017] [Indexed: 12/29/2022]
Abstract
PURPOSE It is not clear whether upper limits of the thyrotropin (TSH) reference range should be lowered. This debate can be better informed by investigation of whether variations in thyroid function within the reference range have clinical effects. Thyroid hormone plays a critical role in determining energy expenditure, body mass, and body composition, and therefore clinically relevant variations in these parameters may occur across the normal range of thyroid function. METHODS This was a cross-sectional study of 140 otherwise healthy hypothyroid subjects receiving chronic replacement therapy with levothyroxine (L-T4) who had TSH levels across the full span of the laboratory reference range (0.34 to 5.6 mU/L). Subjects underwent detailed tests of energy expenditure (total and resting energy expenditure, thermic effect of food, physical activity energy expenditure), substrate oxidation, diet intake, and body composition. RESULTS Subjects with low-normal (≤2.5 mU/L) and high-normal (>2.5 mU/L) TSH levels did not differ in any of the outcome measures. However, across the entire group, serum free triiodothyronine (fT3) levels were directly correlated with resting energy expenditure, body mass index (BMI), body fat mass, and visceral fat mass, with clinically relevant variations in these outcomes. CONCLUSIONS Variations in thyroid function within the laboratory reference range have clinically relevant correlations with resting energy expenditure, BMI, and body composition in L-T4-treated subjects. However, salutary effects of higher fT3 levels on energy expenditure may be counteracted by deleterious effects on body weight and composition. Further studies are needed before these outcomes should be used as a basis for altering L-T4 doses in L-T4-treated subjects.
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Affiliation(s)
- Mary H. Samuels
- Division of Endocrinology, Diabetes and Clinical Nutrition, Oregon Health & Science University, Portland, Oregon 97239
| | - Irina Kolobova
- Penn State Health St. Joseph Family Medicine Residency, Reading, Pennsylvania 19603
| | - Megan Antosik
- Legacy Emanuel Medical Center, Portland, Oregon 97227
| | - Meike Niederhausen
- Biostatistics & Design Program, Oregon Health & Science University–Portland State University School of Public Health, Portland, Oregon 97239
| | - Jonathan Q. Purnell
- Knight Cardiovascular Institute, Division of Endocrinology, Diabetes and Clinical Nutrition, Oregon Health & Science University, Portland, Oregon 97239
| | - Kathryn G. Schuff
- Division of Endocrinology, Diabetes and Clinical Nutrition, Oregon Health & Science University, Portland, Oregon 97239
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Ignacio DL, Silvestre DHS, Anne-Palmer E, Bocco BMLC, Fonseca TL, Ribeiro MO, Gereben B, Bianco AC, Werneck-de-Castro JP. Early Developmental Disruption of Type 2 Deiodinase Pathway in Mouse Skeletal Muscle Does Not Impair Muscle Function. Thyroid 2017; 27:577-586. [PMID: 27967605 PMCID: PMC5385430 DOI: 10.1089/thy.2016.0392] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND Myogenesis is positively regulated by thyroid hormone (triiodothyronine [T3]), which is amplified by the type 2 deiodinase (D2) activation of thyroxine to T3. Global inactivation of the Dio2 gene impairs skeletal muscle (SKM) differentiation and regeneration in response to muscle injury. Given that newborn and adult mice with late developmental SKM Dio2 disruption do not develop a significant phenotype, it was hypothesized that D2 plays an early role in this process. METHODS This was tested in mice with SKM disruption of Dio2 driven by two early developmental promoters: MYF5 and MYOD. RESULTS MYF5 myoblasts in culture differentiate normally into myotubes, despite loss of almost all D2 activity. Dio2 mRNA levels in developing SKM obtained from MYF5-D2KO embryos (E18.5) were about 54% of control littermates, but the expression of the T3-responsive genes Myh1 and 7 and Atp2a1 and 2 were not affected. In MYF5-D2KO and MYOD-D2KO neonatal hind-limb muscle, the expression of Myh1 and 7 and Atp2a2 remained unaffected, despite 60-70% loss in D2 activity and/or mRNA. Only in MYOD-D2KO neonatal muscle was there a 40% reduction in Atp2a1 mRNA. Postnatal growth of both mouse models and SKM function as assessed by exercise capacity and measurement of muscle strength were normal. Furthermore, an analysis of the adult soleus revealed no changes in the expression of T3-responsive genes, except for an about 18% increase in MYOD-D2KO SOL Myh7 mRNA. CONCLUSION Two mouse models of early developmental disruption of Dio2 in myocyte precursor exhibit no significant SKM phenotype.
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Affiliation(s)
- Daniele L Ignacio
- 1 Division of Endocrinology and Metabolism, Rush University Medical Center , Chicago, Illinois
- 2 Biophysics Institute and School of Physical Education and Sports, Federal University of Rio de Janeiro , Rio de Janeiro, Brazil
| | - Diego H S Silvestre
- 1 Division of Endocrinology and Metabolism, Rush University Medical Center , Chicago, Illinois
- 2 Biophysics Institute and School of Physical Education and Sports, Federal University of Rio de Janeiro , Rio de Janeiro, Brazil
- 3 Nutrition Institute Josué de Castro, Federal University of Rio de Janeiro , Rio de Janeiro, Brazil
| | - Elena Anne-Palmer
- 1 Division of Endocrinology and Metabolism, Rush University Medical Center , Chicago, Illinois
| | - Barbara M L C Bocco
- 1 Division of Endocrinology and Metabolism, Rush University Medical Center , Chicago, Illinois
- 4 Department of Translational Medicine, Federal University of São Paulo , São Paulo, Brazil
| | - Tatiana L Fonseca
- 1 Division of Endocrinology and Metabolism, Rush University Medical Center , Chicago, Illinois
| | - Miriam O Ribeiro
- 5 Developmental Disorders Program, Center for Biological and Health Sciences, Mackenzie Presbyterian University , São Paulo, Brazil
| | - Balázs Gereben
- 6 Department of Endocrine Neurobiology, Institute of Experimental Medicine , Hungarian Academy of Sciences, Budapest, Hungary
| | - Antonio C Bianco
- 1 Division of Endocrinology and Metabolism, Rush University Medical Center , Chicago, Illinois
| | - Joao P Werneck-de-Castro
- 1 Division of Endocrinology and Metabolism, Rush University Medical Center , Chicago, Illinois
- 2 Biophysics Institute and School of Physical Education and Sports, Federal University of Rio de Janeiro , Rio de Janeiro, Brazil
- 3 Nutrition Institute Josué de Castro, Federal University of Rio de Janeiro , Rio de Janeiro, Brazil
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31
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Chatzitomaris A, Hoermann R, Midgley JE, Hering S, Urban A, Dietrich B, Abood A, Klein HH, Dietrich JW. Thyroid Allostasis-Adaptive Responses of Thyrotropic Feedback Control to Conditions of Strain, Stress, and Developmental Programming. Front Endocrinol (Lausanne) 2017; 8:163. [PMID: 28775711 PMCID: PMC5517413 DOI: 10.3389/fendo.2017.00163] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 06/27/2017] [Indexed: 12/21/2022] Open
Abstract
The hypothalamus-pituitary-thyroid feedback control is a dynamic, adaptive system. In situations of illness and deprivation of energy representing type 1 allostasis, the stress response operates to alter both its set point and peripheral transfer parameters. In contrast, type 2 allostatic load, typically effective in psychosocial stress, pregnancy, metabolic syndrome, and adaptation to cold, produces a nearly opposite phenotype of predictive plasticity. The non-thyroidal illness syndrome (NTIS) or thyroid allostasis in critical illness, tumors, uremia, and starvation (TACITUS), commonly observed in hospitalized patients, displays a historically well-studied pattern of allostatic thyroid response. This is characterized by decreased total and free thyroid hormone concentrations and varying levels of thyroid-stimulating hormone (TSH) ranging from decreased (in severe cases) to normal or even elevated (mainly in the recovery phase) TSH concentrations. An acute versus chronic stage (wasting syndrome) of TACITUS can be discerned. The two types differ in molecular mechanisms and prognosis. The acute adaptation of thyroid hormone metabolism to critical illness may prove beneficial to the organism, whereas the far more complex molecular alterations associated with chronic illness frequently lead to allostatic overload. The latter is associated with poor outcome, independently of the underlying disease. Adaptive responses of thyroid homeostasis extend to alterations in thyroid hormone concentrations during fetal life, periods of weight gain or loss, thermoregulation, physical exercise, and psychiatric diseases. The various forms of thyroid allostasis pose serious problems in differential diagnosis of thyroid disease. This review article provides an overview of physiological mechanisms as well as major diagnostic and therapeutic implications of thyroid allostasis under a variety of developmental and straining conditions.
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Affiliation(s)
- Apostolos Chatzitomaris
- Medical Department I, Endocrinology and Diabetology, Bergmannsheil University Hospitals, Ruhr University of Bochum, Bochum, Germany
- *Correspondence: Apostolos Chatzitomaris,
| | - Rudolf Hoermann
- Private Consultancy, Research and Development, Yandina, QLD, Australia
| | | | - Steffen Hering
- Department for Internal Medicine, Cardiology, Endocrinology, Diabetes and Medical Intensive Care Medicine, Krankenhaus Bietigheim-Vaihingen, Bietigheim-Bissingen, Germany
| | - Aline Urban
- Department for Anesthesiology, Intensive Care and Palliative Medicine, Eastern Allgäu-Kaufbeuren Hospitals, Kaufbeuren, Germany
| | | | - Assjana Abood
- Medical Department I, Endocrinology and Diabetology, Bergmannsheil University Hospitals, Ruhr University of Bochum, Bochum, Germany
| | - Harald H. Klein
- Medical Department I, Endocrinology and Diabetology, Bergmannsheil University Hospitals, Ruhr University of Bochum, Bochum, Germany
- Ruhr Center for Rare Diseases (CeSER), Ruhr University of Bochum and Witten/Herdecke University, Bochum, Germany
| | - Johannes W. Dietrich
- Medical Department I, Endocrinology and Diabetology, Bergmannsheil University Hospitals, Ruhr University of Bochum, Bochum, Germany
- Ruhr Center for Rare Diseases (CeSER), Ruhr University of Bochum and Witten/Herdecke University, Bochum, Germany
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Peterson SJ, McAninch EA, Bianco AC. Is a Normal TSH Synonymous With "Euthyroidism" in Levothyroxine Monotherapy? J Clin Endocrinol Metab 2016; 101:4964-4973. [PMID: 27700539 PMCID: PMC6287526 DOI: 10.1210/jc.2016-2660] [Citation(s) in RCA: 112] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
CONTEXT Levothyroxine (LT4) monotherapy is the standard of care for hypothyroidism. OBJECTIVE To determine whether LT4 at doses that normalize the serum TSH is associated with normal markers of thyroid status. DESIGN Cross-sectional data from the US National Health and Nutrition Examination Survey (2001-2012) was used to evaluate 52 clinical parameters. LT4 users were compared to healthy controls and controls matched for age, sex, race, and serum TSH. Regression was used to evaluate for correlation with T4 and T3 levels. PARTICIPANTS A total of 9981 participants with normal serum TSH were identified; 469 were LT4-treated. RESULTS Participants using LT4 had higher serum total and free T4 and lower serum total and free T3 than healthy or matched controls. This translated to approximately 15-20% lower serum T3:T4 ratios in LT4 treatment, as has been shown in other cohorts. In comparison to matched controls, LT4-treated participants had higher body mass index despite report of consuming fewer calories/day/kg; were more likely to be taking beta-blockers, statins, and antidepressants; and reported lower total metabolic equivalents. A serum TSH level below the mean in LT4-treated participants was associated with a higher serum free T4 but similar free and total T3; yet those with lower serum TSH levels exhibited higher serum high-density lipoprotein and lower serum low-density lipoprotein, triglycerides, and C-reactive protein. Age was negatively associated with serum free T3:free T4 ratio in all participants; caloric intake was positively associated in LT4-treated individuals. CONCLUSIONS In a large population study, participants using LT4 exhibited lower serum T3:T4 ratios and differed in 12/52 objective and subjective measures.
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Affiliation(s)
- Sarah J Peterson
- Division of Endocrinology and Metabolism, Rush University Medical Center, Chicago, Illinois
| | - Elizabeth A McAninch
- Division of Endocrinology and Metabolism, Rush University Medical Center, Chicago, Illinois
| | - Antonio C Bianco
- Division of Endocrinology and Metabolism, Rush University Medical Center, Chicago, Illinois
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