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Javadirad SM. NKX2-1 gene is targeted by H19 lncRNA and is found to be overexpressed in benign nodular goiter tissues. Braz J Otorhinolaryngol 2024; 90:101409. [PMID: 38537502 PMCID: PMC10987871 DOI: 10.1016/j.bjorl.2024.101409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 01/07/2024] [Accepted: 01/31/2024] [Indexed: 04/07/2024] Open
Abstract
OBJECTIVE Nodular goiter may increase the risk of thyroid cancer, but the genetic factors contributing to nodular goiter are not well understood. There is an overexpression of H19 lncRNA in goiter tissue and its target remains unknown. In this study, we attempted to identify a new target for H19 in the context of goiter development. METHODS Using interaction energy calculations, the interaction between NKX2-1 mRNA and H19 lncRNA was examined. Putative microRNAs were found at the H19 lncRNA target site with the highest affinity for NKX2-1. RNAseq data was analyzed to determine the tissue specificity of gene expression. Samples were taken from 18 goiter and 18 normal tissues during thyroidectomy. The expression of NKX2-1 was determined by RT-qPCR using specific primers. RESULTS The interaction between NKX2-1 and H19 was characterized by six local base-pairing connections, with a maximum energy of -20.56 kcal/moL. Specifically, the sequence that displayed the highest affinity for binding with H19 overlapped with the binding site of has-miR-1827 to NKX2-1. It was found that NKX2-1 is exclusively co-expressed with H19 in normal thyroid tissue. As compared to adjacent normal tissues, nodular goiter tissues have a significant overexpression of NKX2-1 (relative expression = 1.195, p = 0.038). CONCLUSION NKX2-1 has been identified as the putative target of H19 lncRNA, which is overexpressed in nodular goiter tissues significantly. LEVEL OF EVIDENCE: 4
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Affiliation(s)
- Seyed-Morteza Javadirad
- University of Isfahan, Faculty of Biological Science and Technology, Department of Cell and Molecular Biology and Microbiology, Isfahan, Iran.
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Nakahama K, Kaneda H, Osawa M, Izumi M, Yoshimoto N, Sugimoto A, Nagamine H, Ogawa K, Matsumoto Y, Sawa K, Tani Y, Mitsuoka S, Watanabe T, Asai K, Kawaguchi T. Association of thyroid transcription factor-1 with the efficacy of immune-checkpoint inhibitors in patients with advanced lung adenocarcinoma. Thorac Cancer 2022; 13:2309-2317. [PMID: 35808895 PMCID: PMC9376174 DOI: 10.1111/1759-7714.14560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 06/09/2022] [Accepted: 06/12/2022] [Indexed: 11/29/2022] Open
Abstract
Background We aimed to identify the relationship between thyroid transcription factor‐1 (TTF‐1) expression of lung adenocarcinoma and the efficacy of immune‐checkpoint inhibitor (ICI) therapy. Methods This retrospective multicenter study comprised patients with advanced lung adenocarcinoma treated with ICI monotherapy. We collected clinical medical records including data on TTF‐1 expression and analyzed the relationship between TTF‐1 expression and programmed death‐ligand 1 tumor proportion score (PD‐L1 TPS), objective response rate (ORR), progression‐free survival (PFS), and overall survival (OS). Results In total, 108 patients with lung adenocarcinoma were analyzed. The rate of TPS ≥1% and ≥50% in patients with positive TTF‐1 expression was significantly higher than that in patients with negative TTF‐1 expression (88% vs. 60%, p < 0.001; 65% vs. 24%, p < 0.001). The ORR was significantly higher in TTF‐1 positive patients than in TTF‐1‐negative patients (38% vs. 8%, p = 0.003). Among patients with TPS ≥50% and 1%–49%, the ORR in TTF‐1 positive and negative patients was 48% (26/54) versus 17% (1/6) (p = 0.21), and 32% (6/19) versus 11% (1/9) (p = 0.37), respectively. The ORR for patients with TPS <1% was 0% in both the TTF‐1 negative and positive cases. The median PFS and OS was significantly longer in TTF‐1‐positive patients than in TTF‐1‐negative patients (5.4 vs. 1.6 months, p < 0.001; 18.2 vs. 8.0 months, p = 0.041). Multivariate analysis revealed that TTF‐1‐negative status was an independent unfavorable prognostic factor for PFS. Conclusion Patients with TTF‐1‐positive status receiving ICI monotherapy showed better outcomes than those with TTF‐1‐negative lung adenocarcinoma.
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Affiliation(s)
- Kenji Nakahama
- Department of Respiratory Medicine, Graduate School of Medicine, Osaka City University, Osaka, Japan
| | - Hiroyasu Kaneda
- Department of Clinical Oncology, Graduate School of Medicine, Osaka Metropolitan University, Osaka, Japan
| | - Masahiko Osawa
- Department of Diagnostic Pathology, Graduate School of Medicine, Osaka Metropolitan University, Osaka, Japan
| | - Motohiro Izumi
- Department of Pulmonary Medicine, Bell land General Hospital, Sakai, Japan
| | - Naoki Yoshimoto
- Department of Pulmonary Medicine, Ishikiriseiki Hospital, Higashiosaka, Japan
| | - Akira Sugimoto
- Department of Respiratory Medicine, Graduate School of Medicine, Osaka Metropolitan University, Osaka, Japan
| | - Hiroaki Nagamine
- Department of Respiratory Medicine, Graduate School of Medicine, Osaka Metropolitan University, Osaka, Japan
| | - Koichi Ogawa
- Department of Respiratory Medicine, Graduate School of Medicine, Osaka Metropolitan University, Osaka, Japan
| | - Yoshiya Matsumoto
- Department of Respiratory Medicine, Graduate School of Medicine, Osaka Metropolitan University, Osaka, Japan
| | - Kenji Sawa
- Department of Respiratory Medicine, Graduate School of Medicine, Osaka Metropolitan University, Osaka, Japan
| | - Yoko Tani
- Department of Clinical Oncology, Graduate School of Medicine, Osaka Metropolitan University, Osaka, Japan
| | - Shigeki Mitsuoka
- Department of Clinical Oncology, Graduate School of Medicine, Osaka Metropolitan University, Osaka, Japan
| | - Tetsuya Watanabe
- Department of Respiratory Medicine, Graduate School of Medicine, Osaka Metropolitan University, Osaka, Japan
| | - Kazuhisa Asai
- Department of Respiratory Medicine, Graduate School of Medicine, Osaka Metropolitan University, Osaka, Japan
| | - Tomoya Kawaguchi
- Department of Clinical Oncology, Graduate School of Medicine, Osaka Metropolitan University, Osaka, Japan.,Department of Respiratory Medicine, Graduate School of Medicine, Osaka Metropolitan University, Osaka, Japan
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3
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Camats N, Baz-Redón N, Fernández-Cancio M, Clemente M, Campos-Martorell A, Jaimes N, Antolín M, Garcia-Arumí E, Blasco-Pérez L, Paramonov I, Mogas E, Soler-Colomer L, Yeste D. Phenotypic Variability of Patients With PAX8 Variants Presenting With Congenital Hypothyroidism and Eutopic Thyroid. J Clin Endocrinol Metab 2021; 106:e152-e170. [PMID: 33029631 DOI: 10.1210/clinem/dgaa711] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 10/05/2020] [Indexed: 11/19/2022]
Abstract
PURPOSE Thyroid dyshormonogenesis is a heterogeneous group of hereditary diseases produced by a total/partial blockage of the biochemical processes of thyroid-hormone synthesis and secretion. Paired box 8 (PAX8) is essential for thyroid morphogenesis and thyroid hormone synthesis. We aimed to identify PAX8 variants in patients with thyroid dyshormonogenesis and to analyze them with in vitro functional studies. PATIENTS AND METHODS Nine pediatric patients with a eutopic thyroid gland were analyzed by the Catalan screening program for congenital hypothyroidism. Scintigraphies showed absent, low, or normal uptake. Only one patient had a hypoplastic gland. On reevaluation, perchlorate discharge test was negative or compatible with partial iodine-organization deficit. After evaluation, 8 patients showed permanent mild or severe hypothyroidism. Massive-sequencing techniques were used to detect variants in congenital hypothyroidism-related genes. In vitro functional studies were based on transactivating activity of mutant PAX8 on a TG-gene promoter and analyzed by a dual-luciferase assays. RESULTS We identified 7 heterozygous PAX8 exonic variants and 1 homozygous PAX8 splicing variant in 9 patients with variable phenotypes of thyroid dyshormonogenesis. Five were novel and 5 variants showed a statistically significant impaired transcriptional activity of TG promoter: 51% to 78% vs the wild type. CONCLUSIONS Nine patients presented with PAX8 candidate variants. All presented with a eutopic thyroid gland and 7 had deleterious variants. The phenotype of affected patients varies considerably, even within the same family; but, all except the homozygous patient presented with a normal eutopic thyroid gland and thyroid dyshormonogenesis. PAX8 functional studies have shown that 6 PAX8 variants are deleterious. Our studies have proven effective in evaluating these variants.
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Affiliation(s)
- Núria Camats
- Growth and Development group, Vall d'Hebron Research Institute (VHIR), Hospital Universitari Vall d'Hebron, Barcelona, Spain
- CIBERER, ISCIII, Madrid, Spain
| | - Noelia Baz-Redón
- Growth and Development group, Vall d'Hebron Research Institute (VHIR), Hospital Universitari Vall d'Hebron, Barcelona, Spain
- Pediatrics, Obstetrics and Gynecology and Preventive Medicine Department, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - Mónica Fernández-Cancio
- Growth and Development group, Vall d'Hebron Research Institute (VHIR), Hospital Universitari Vall d'Hebron, Barcelona, Spain
- CIBERER, ISCIII, Madrid, Spain
| | - María Clemente
- Growth and Development group, Vall d'Hebron Research Institute (VHIR), Hospital Universitari Vall d'Hebron, Barcelona, Spain
- CIBERER, ISCIII, Madrid, Spain
- Pediatrics, Obstetrics and Gynecology and Preventive Medicine Department, Universitat Autònoma de Barcelona, Bellaterra, Spain
- Pediatric Endocrinology Section, Hospital Universitari Vall d'Hebron, Barcelona, Spain
| | - Ariadna Campos-Martorell
- Growth and Development group, Vall d'Hebron Research Institute (VHIR), Hospital Universitari Vall d'Hebron, Barcelona, Spain
- Pediatrics, Obstetrics and Gynecology and Preventive Medicine Department, Universitat Autònoma de Barcelona, Bellaterra, Spain
- Pediatric Endocrinology Section, Hospital Universitari Vall d'Hebron, Barcelona, Spain
| | - Nadya Jaimes
- Department of Pediatric Endocrinology, Hospital Fundación la Misericordia HOMI, Bogotá, Colombia
| | - María Antolín
- Department of Clinical and Molecular Genetics and Rare Disease, Hospital Universitari Vall d'Hebron, Barcelona, Spain
- Medicine Genetics Group, VHIR, Hospital Universitari Vall d'Hebron, Barcelona, Spain
| | - Elena Garcia-Arumí
- Department of Clinical and Molecular Genetics and Rare Disease, Hospital Universitari Vall d'Hebron, Barcelona, Spain
- Medicine Genetics Group, VHIR, Hospital Universitari Vall d'Hebron, Barcelona, Spain
- Research Group on Neuromuscular and Mitochondrial Disorders, VHIR, Hospital Universitari Vall d'Hebron, Barcelona, Spain
| | - Laura Blasco-Pérez
- Department of Clinical and Molecular Genetics and Rare Disease, Hospital Universitari Vall d'Hebron, Barcelona, Spain
- Medicine Genetics Group, VHIR, Hospital Universitari Vall d'Hebron, Barcelona, Spain
| | - Ida Paramonov
- Department of Clinical and Molecular Genetics and Rare Disease, Hospital Universitari Vall d'Hebron, Barcelona, Spain
| | - Eduard Mogas
- Pediatric Endocrinology Section, Hospital Universitari Vall d'Hebron, Barcelona, Spain
| | - Laura Soler-Colomer
- Pediatric Endocrinology Section, Hospital Universitari Vall d'Hebron, Barcelona, Spain
| | - Diego Yeste
- Growth and Development group, Vall d'Hebron Research Institute (VHIR), Hospital Universitari Vall d'Hebron, Barcelona, Spain
- CIBERER, ISCIII, Madrid, Spain
- Pediatrics, Obstetrics and Gynecology and Preventive Medicine Department, Universitat Autònoma de Barcelona, Bellaterra, Spain
- Pediatric Endocrinology Section, Hospital Universitari Vall d'Hebron, Barcelona, Spain
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Parekh KR, Nawroth J, Pai A, Busch SM, Senger CN, Ryan AL. Stem cells and lung regeneration. Am J Physiol Cell Physiol 2020; 319:C675-C693. [PMID: 32783658 PMCID: PMC7654650 DOI: 10.1152/ajpcell.00036.2020] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 08/03/2020] [Accepted: 08/03/2020] [Indexed: 12/20/2022]
Abstract
The ability to replace defective cells in an airway with cells that can engraft, integrate, and restore a functional epithelium could potentially cure a number of lung diseases. Progress toward the development of strategies to regenerate the adult lung by either in vivo or ex vivo targeting of endogenous stem cells or pluripotent stem cell derivatives is limited by our fundamental lack of understanding of the mechanisms controlling human lung development, the precise identity and function of human lung stem and progenitor cell types, and the genetic and epigenetic control of human lung fate. In this review, we intend to discuss the known stem/progenitor cell populations, their relative differences between rodents and humans, their roles in chronic lung disease, and their therapeutic prospects. Additionally, we highlight the recent breakthroughs that have increased our understanding of these cell types. These advancements include novel lineage-traced animal models and single-cell RNA sequencing of human airway cells, which have provided critical information on the stem cell subtypes, transition states, identifying cell markers, and intricate pathways that commit a stem cell to differentiate or to maintain plasticity. As our capacity to model the human lung evolves, so will our understanding of lung regeneration and our ability to target endogenous stem cells as a therapeutic approach for lung disease.
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Affiliation(s)
- Kalpaj R Parekh
- Department Surgery, Division of Cardiothoracic Surgery, University of Iowa, Iowa City, Iowa
| | - Janna Nawroth
- Hastings Center for Pulmonary Research, Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, University of Southern California, Los Angeles, California
| | - Albert Pai
- Department Surgery, Division of Cardiothoracic Surgery, University of Iowa, Iowa City, Iowa
| | - Shana M Busch
- Hastings Center for Pulmonary Research, Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, University of Southern California, Los Angeles, California
| | - Christiana N Senger
- Hastings Center for Pulmonary Research, Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, University of Southern California, Los Angeles, California
| | - Amy L Ryan
- Hastings Center for Pulmonary Research, Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, University of Southern California, Los Angeles, California
- Department of Stem Cell Biology and Regenerative Medicine, University of Southern California, Los Angeles, California
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5
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Calvert BA, Ryan Firth AL. Application of iPSC to Modelling of Respiratory Diseases. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1237:1-16. [PMID: 31468358 PMCID: PMC8274633 DOI: 10.1007/5584_2019_430] [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] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Respiratory disease is one of the leading causes of morbidity and mortality world-wide with an increasing incidence as the aged population prevails. Many lung diseases are treated for symptomatic relief, with no cure available, indicating a critical need for novel therapeutic strategies. Such advances are hampered by a lack of understanding of how human lung pathologies initiate and progress. Research on human lung disease relies on the isolation of primary cells from explanted lungs or the use of immortalized cells, both are limited in their capacity to represent the genomic and phenotypic variability among the population. In an era where we are progressing toward precision medicine the use of patient specific induced pluripotent cells (iPSC) to generate models, where sufficient primary cells and tissues are scarce, has increased our capacity to understand human lung pathophysiology. Directed differentiation of iPSC toward lung presented the initial challenge to overcome in generating iPSC-derived lung epithelial cells. Since then major advances have been made in defining protocols to specify and isolate specific lung lineages, with the generation of airway spheroids and multi cellular organoids now possible. This technological advance has opened up our capacity for human lung research and prospects for autologous cell therapy. This chapter will focus on the application of iPSC to studying human lung disease.
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Affiliation(s)
- Ben A Calvert
- Hastings Center for Pulmonary Research, Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Amy L Ryan Firth
- Hastings Center for Pulmonary Research, Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, University of Southern California, Los Angeles, CA, USA.
- Department of Stem Cell Biology and Regenerative Medicine, University of Southern California, Los Angeles, CA, USA.
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Koyama J, Horiike A, Yoshizawa T, Dotsu Y, Ariyasu R, Saiki M, Sonoda T, Uchibori K, Nishikawa S, Kitazono S, Yanagitani N, Ninomiya H, Ishikawa Y, Nishio M. Correlation between thyroid transcription factor-1 expression, immune-related thyroid dysfunction, and efficacy of anti-programmed cell death protein-1 treatment in non-small cell lung cancer. J Thorac Dis 2019; 11:1919-1928. [PMID: 31285885 DOI: 10.21037/jtd.2019.04.102] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Background Recent studies have suggested a correlation between immune-related thyroid dysfunction (irTD) and the superior efficacy of anti-programmed cell death protein-1 (anti-PD-1) treatment in non-small cell lung cancer (NSCLC). Embryologically, the lung and thyroid are similar in origin, and thyroid transcription factor-1 (TTF-1) expresses in both organs, including NSCLC. We explored our hypothesis that TTF-1 expression in NSCLC might correlate with irTD incidence and anti-PD-1 treatment efficacy. Methods We identified 132 patients with NSCLC treated with anti-PD-1 antibody at our hospital between December 2015 and June 2017. We evaluated TTF-1 expression in tumor by immunohistochemistry using a mouse monoclonal antibody (clone 8G7G3/1, 1:100, Dako). IrTD was defined as two or more successive abnormal levels of thyroid-stimulating hormone (TSH) during anti-PD-1 treatment. We retrospectively assessed correlations between TTF-1 expression in tumor, irTD incidence, and anti-PD-1 treatment efficacy. Results Of 132 patients, 67 (51%) and 65 (49%) were positive and negative for TTF-1, respectively. We observed irTD in 19 patients (6 positives and 13 negatives for TTF-1). The incidence of irTD was 9% and 20% in TTF-1-positive and TTF-1-negative NSCLCs, respectively (P=0.086). Particularly, in non-squamous (NSQ) cell carcinomas, the irTD incidence was significantly higher in patients negative for TTF-1 (30%) than in those positive for TTF-1 (9%; P=0.010), and TTF-1 expression was identified as a significant risk factor for irTD on multivariate logistic regression analysis [odds ratio (OR), 0.18; 95% confidence interval (CI), 0.05-0.59; P=0.005]. Furthermore, longer median progression-free survival (10.3 months) was observed in patients with TTF-1-negative NSCLC with irTD compared to those with TTF-1-positive NSCLC with irTD, TTF-1-positive NSCLC without irTD, and TTF-1-negative NSCLC without irTD (4.2, 1.4, and 2.4 months, respectively). Conclusions TTF-1 expression in NSCLC might correlate with irTD and anti-PD-1 treatment efficacy.
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Affiliation(s)
- Junji Koyama
- Department of Thoracic Medical Oncology, The Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Atsushi Horiike
- Department of Thoracic Medical Oncology, The Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Takahiro Yoshizawa
- Department of Thoracic Medical Oncology, The Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Yosuke Dotsu
- Department of Thoracic Medical Oncology, The Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Ryo Ariyasu
- Department of Thoracic Medical Oncology, The Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Masafumi Saiki
- Department of Thoracic Medical Oncology, The Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Tomoaki Sonoda
- Department of Thoracic Medical Oncology, The Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Ken Uchibori
- Department of Thoracic Medical Oncology, The Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Shingo Nishikawa
- Department of Thoracic Medical Oncology, The Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Satoru Kitazono
- Department of Thoracic Medical Oncology, The Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Noriko Yanagitani
- Department of Thoracic Medical Oncology, The Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Hironori Ninomiya
- Division of Pathology, The Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Yuichi Ishikawa
- Division of Pathology, The Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Makoto Nishio
- Department of Thoracic Medical Oncology, The Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan
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Makretskaya N, Bezlepkina O, Kolodkina A, Kiyaev A, Vasilyev EV, Petrov V, Kalinenkova S, Malievsky O, Dedov II, Tiulpakov A. High frequency of mutations in 'dyshormonogenesis genes' in severe congenital hypothyroidism. PLoS One 2018; 13:e0204323. [PMID: 30240412 PMCID: PMC6150524 DOI: 10.1371/journal.pone.0204323] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2018] [Accepted: 09/06/2018] [Indexed: 11/25/2022] Open
Abstract
OBJECTIVE Results of the screening of disease causative mutations in congenital hypothyroidism (CH) vary significantly, depending on the sequence strategy, patients' inclusion criteria and bioinformatics. The objective was to study the molecular basis of severe congenital hypothyroidism, using the next generation sequencing (NGS) and the recent guidelines for assessment of sequence variants. DESIGN 243 patients with CH (TSH levels at neonatal screening or retesting greater than 90 mU/l) and 56 control subjects were included in the study. METHODS A custom NGS panel targeting 12 CH causative genes was used for sequencing. The sequence variants were rated according to American College of Medical Genetics and Genomics (ACMG) guidelines. RESULTS In total, 48 pathogenic, 7 likely pathogenic and 57 variants of uncertain significance were identified in 92/243 patients (37.9%), while 4 variants of uncertain significance were found in 4/56 control subjects (7.1%). 13.1% (12/92) of the cases showed variants in 'thyroid dysgenesis' (TD) genes: TSHR, n = 6; NKX2-1, n = 2; NKX2-5, n = 1; PAX8, n = 3. The variants in 'dyshormonogenesis' (DH) genes were found in 84.8% (78/92) of cases: TPO, n = 30; DUOX2, n = 24; TG, n = 8; SLC5A5, n = 3; SLC26A4, n = 6; IYD, n = 1. 8 patients showed oligonenic variants. The majority of variants identified in DH genes were monoallelic. CONCLUSIONS In contrast to earlier studies demonstrating the predominance of TD in severe CH, the majority of variants identified in our study were in DH genes. A large proportion of monoallelic variants detected among DH genes suggests that non-mendelian mechanisms may play a role in the development of CH.
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Affiliation(s)
- Nina Makretskaya
- Department and Laboratory of Inherited Endocrine Disorders, Endocrinology Research Centre, Moscow, Russian Federation
| | - Olga Bezlepkina
- Department and Laboratory of Inherited Endocrine Disorders, Endocrinology Research Centre, Moscow, Russian Federation
| | - Anna Kolodkina
- Department and Laboratory of Inherited Endocrine Disorders, Endocrinology Research Centre, Moscow, Russian Federation
| | - Alexey Kiyaev
- Department of Polyclinic Pediatrics, Ural State Medical University, Ekaterinburg, Russian Federation
| | - Evgeny V. Vasilyev
- Department and Laboratory of Inherited Endocrine Disorders, Endocrinology Research Centre, Moscow, Russian Federation
| | - Vasily Petrov
- Department and Laboratory of Inherited Endocrine Disorders, Endocrinology Research Centre, Moscow, Russian Federation
| | - Svetlana Kalinenkova
- Genetics Laboratory, Moscow Regional Research and Clinical Institute, Moscow, Russian Federation
| | - Oleg Malievsky
- Department of Hospital Pediatrics, Republican Children’s Clinical Hospital, Ufa, Russian Federation
| | - Ivan I. Dedov
- Department and Laboratory of Inherited Endocrine Disorders, Endocrinology Research Centre, Moscow, Russian Federation
| | - Anatoly Tiulpakov
- Department and Laboratory of Inherited Endocrine Disorders, Endocrinology Research Centre, Moscow, Russian Federation
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Brčić L, Gračan S, Barić A, Gunjača I, Torlak Lovrić V, Kolčić I, Zemunik T, Polašek O, Barbalić M, Punda A, Boraska Perica V. Association of Established Thyroid-stimulating Hormone and Free Thyroxine Genetic Variants with Hashimoto's Thyroiditis. Immunol Invest 2018; 46:625-638. [PMID: 28753406 DOI: 10.1080/08820139.2017.1337785] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Hashimoto's thyroiditis (HT), the most frequent autoimmune thyroid disease (AITD), is characterized by chronic inflammation of the thyroid gland that usually results in hypothyroidism. Thyroid-stimulating hormone (TSH) and free thyroxine (FT4) levels are used as clinical determinants of thyroid function. The main aim of this study was to explore the association of established TSH and FT4 genetic variants with HT. We performed a case-control analysis using 23 genetic markers in 200 HT patients and 304 controls. Additionally, we tested the association of selected variants with several thyroid-related quantitative traits in HT cases only. Two genetic variants showed nominal association with HT: rs11935941 near NR3C2 gene (p = 0.0034, OR = 0.57, 95% CI = 0.39-0.83) and rs1537424 near MBIP gene (p = 0.0169, OR = 0.72, 95% CI = 0.55-0.94). Additionally, three SNPs showed nominal association with thyroglobulin antibody (TgAb) levels: rs4804416 in INSR gene (p = 0.0073, β = -0.51), rs6435953 near IGFBP5 gene (p = 0.0081, β = 0.75), and rs1537424 near MBIP gene (p = 0.0117, β = 0.49). GLIS3 genetic variant rs10974423 showed nominal association with thyroid peroxidase antibody (TPOAb) levels (p = 0.0465, β = -0.56) and NRG1 genetic variant rs7825175 was nominally associated with thyroid gland volume (p = 0.0272, β = -0.18). All detected loci were previously related to thyroid function or pathology. Findings from our study suggest biological relevance of NR3C2 and MBIP with HT, although these loci require additional confirmation in a larger replication study.
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Affiliation(s)
- Luka Brčić
- a Department of Medical Biology , University of Split, School of Medicine , Split , Croatia
| | - Sanda Gračan
- b Department of Nuclear Medicine , University Hospital Split , Split , Croatia
| | - Ana Barić
- b Department of Nuclear Medicine , University Hospital Split , Split , Croatia
| | - Ivana Gunjača
- a Department of Medical Biology , University of Split, School of Medicine , Split , Croatia
| | | | - Ivana Kolčić
- c Department of Epidemiology , University of Split, School of Medicine , Split , Croatia
| | - Tatijana Zemunik
- a Department of Medical Biology , University of Split, School of Medicine , Split , Croatia
| | - Ozren Polašek
- c Department of Epidemiology , University of Split, School of Medicine , Split , Croatia
| | - Maja Barbalić
- a Department of Medical Biology , University of Split, School of Medicine , Split , Croatia
| | - Ante Punda
- b Department of Nuclear Medicine , University Hospital Split , Split , Croatia
| | - Vesna Boraska Perica
- a Department of Medical Biology , University of Split, School of Medicine , Split , Croatia
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Vincenzi M, Camilot M, Ferrarini E, Teofoli F, Venturi G, Gaudino R, Cavarzere P, De Marco G, Agretti P, Dimida A, Tonacchera M, Boner A, Antoniazzi F. Identification of a novel pax8 gene sequence variant in four members of the same family: from congenital hypothyroidism with thyroid hypoplasia to mild subclinical hypothyroidism. BMC Endocr Disord 2014; 14:69. [PMID: 25146893 PMCID: PMC4142740 DOI: 10.1186/1472-6823-14-69] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Accepted: 07/25/2014] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Congenital hypothyroidism is often secondary to thyroid dysgenesis, including thyroid agenesis, hypoplasia, ectopic thyroid tissue or cysts. Loss of function mutations in TSHR, PAX8, NKX2.1, NKX2.5 and FOXE1 genes are responsible for some forms of inherited congenital hypothyroidism, with or without hypoplastic thyroid. The aim of this study was to analyse the PAX8 gene sequence in several members of the same family in order to understand whether the variable phenotypic expression, ranging from congenital hypothyroidism with thyroid hypoplasia to mild subclinical hypothyroidism, could be associated to the genetic variant in the PAX8 gene, detected in the proband. METHODS We screened a hypothyroid child with thyroid hypoplasia for mutations in PAX8, TSHR, NKX2.1, NKX2.5 and FOXE1 genes. We studied the inheritance of the new variant R133W detected in the PAX8 gene in the proband's family, and we looked for the same substitution in 115 Caucasian European subjects and in 26 hypothyroid children. Functional studies were performed to assess the in vitro effect of the newly identified PAX8 gene variant. RESULTS A new heterozygous nucleotide substitution was detected in the PAX8 DNA-binding motif (c.397C/T, R133W) in the proband, affected by congenital hypothyroidism with thyroid hypoplasia, in his older sister, displaying a subclinical hypothyroidism associated with thyroid hypoplasia and thyroid nodules, in his father, affected by hypothyroidism with thyroid hypoplasia and thyroid nodules, and his first cousin as well, who revealed only a subclinical hypothyroidism. Functional studies of R133W-PAX8 in the HEK293 cells showed activation of the TG promoter comparable to the wild-type PAX8. CONCLUSIONS In vitro data do not prove that R133W-PAX8 is directly involved in the development of the thyroid phenotypes reported for family members carrying the substitution. However, it is reasonable to conceive that, in the cases of transcriptions factors, such as Pax8, which establish several interactions in different protein complexes, genetic variants could have an impact in vivo.
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Affiliation(s)
- Monica Vincenzi
- Department of Life and Reproduction Sciences, University of Verona, Piazzale Scuro 10, 37126 Verona, Italy
| | - Marta Camilot
- Department of Life and Reproduction Sciences, University of Verona, Piazzale Scuro 10, 37126 Verona, Italy
- Azienda Ospedaliera Universitaria Integrata di Verona, Verona, Italy
| | - Eleonora Ferrarini
- Department of Endocrinology, Centro di Eccellenza AmbiSEN, University of Pisa, Pisa, Italy
| | - Francesca Teofoli
- Department of Life and Reproduction Sciences, University of Verona, Piazzale Scuro 10, 37126 Verona, Italy
- Azienda Ospedaliera Universitaria Integrata di Verona, Verona, Italy
| | - Giacomo Venturi
- Department of Life and Reproduction Sciences, University of Verona, Piazzale Scuro 10, 37126 Verona, Italy
| | - Rossella Gaudino
- Department of Life and Reproduction Sciences, University of Verona, Piazzale Scuro 10, 37126 Verona, Italy
- Azienda Ospedaliera Universitaria Integrata di Verona, Verona, Italy
| | - Paolo Cavarzere
- Azienda Ospedaliera Universitaria Integrata di Verona, Verona, Italy
| | - Giuseppina De Marco
- Department of Endocrinology, Centro di Eccellenza AmbiSEN, University of Pisa, Pisa, Italy
| | - Patrizia Agretti
- Department of Endocrinology, Centro di Eccellenza AmbiSEN, University of Pisa, Pisa, Italy
| | - Antonio Dimida
- Department of Endocrinology, Centro di Eccellenza AmbiSEN, University of Pisa, Pisa, Italy
| | - Massimo Tonacchera
- Department of Endocrinology, Centro di Eccellenza AmbiSEN, University of Pisa, Pisa, Italy
| | - Attilio Boner
- Department of Life and Reproduction Sciences, University of Verona, Piazzale Scuro 10, 37126 Verona, Italy
- Azienda Ospedaliera Universitaria Integrata di Verona, Verona, Italy
| | - Franco Antoniazzi
- Department of Life and Reproduction Sciences, University of Verona, Piazzale Scuro 10, 37126 Verona, Italy
- Azienda Ospedaliera Universitaria Integrata di Verona, Verona, Italy
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10
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Panait N, Michel F, D'Ercole C, Merrot T. Esophageal atresia, small omphalocele and ileal prolapse through a patent omphalomesenteric duct: a methimazole embryopathy? [Corrected]. J Pediatr Surg 2013; 48:E9-11. [PMID: 23845657 DOI: 10.1016/j.jpedsurg.2013.03.073] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2012] [Revised: 03/26/2013] [Accepted: 03/27/2013] [Indexed: 11/17/2022]
Abstract
Newborns prenatally exposed to methimazole (active metabolite of carbamizole) for maternal hyperthyroidism may present some disorders in common, but the phenotype is not well defined. Choanal atresia is the most frequent, and other anomalies such as esophageal atresia and aplasia cutis were described with this embryopathy. Additionally, patent omphalomesenteric duct or Meckel's diverticulum in similar association was reported in some patients. The predisposed genetic background has to be considered. We report the case of a newborn exposed to carbamizole during the first 4 weeks of pregnancy and define an association related to prenatal methamizole exposure consisting of esophageal atresia, small omphalocele, and ileal prolapse through a patent omphalomesenteric duct.
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Affiliation(s)
- Nicoleta Panait
- Department of Pediatric Surgery, AP-HM, Hôpital Nord, Marseille, France.
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11
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Christophe-Hobertus C, Lefort A, Libert F, Christophe D. Functional inactivation of thyroid transcription factor-1 in PCCl3 thyroid cells. Mol Cell Endocrinol 2012; 358:36-45. [PMID: 22370158 DOI: 10.1016/j.mce.2012.02.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2011] [Revised: 02/10/2012] [Accepted: 02/10/2012] [Indexed: 01/07/2023]
Abstract
Thyroid transcription factor-1 (TTF-1) is a key regulator of thyroid development and function. In order to identify the genes whose expression depends on TTF-1 transcriptional activity within the thyrocyte we analyzed the consequence of the functional inactivation of this factor in PCCl3 cells. The expression of a fusion protein composed of the DNA binding domain of TTF-1 and of the strong repressive domain of the engrailed protein resulted in a dramatic loss of epithelial cell morphology and in proliferation arrest. These changes were reversed when the inhibition of endogenous TTF-1 was relieved. No change was observed when a similar fusion protein containing point mutations abolishing DNA binding activity was produced in the cells. Besides the expected down-regulation of expression of the main genes linked to the differentiated thyroid function, we observed a decreased expression of the transcription factors Hhex, Pax 8 and TTF-2 and of E-cadherin. By contrast, both ThOX-1 and DUOXA-1 genes were up-regulated, as well as the ones encoding vimentin and several proteins involved in cell cycle arrest. Our data thus extend the known roles of TTF-1 in thyroid development and in the expression of differentiated function in the adult organ to the control of epithelial morphology and of cell division in mature thyrocytes.
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Affiliation(s)
- Christiane Christophe-Hobertus
- Institut de Recherche Interdisciplinaire en Biologie Humaine et Moléculaire, Université Libre de Bruxelles, IBMM, Biopark Charleroi Brussels South, B-6041 Gosselies, Belgium
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12
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Uematsu M, Haginoya K, Kikuchi A, Nakayama T, Kakisaka Y, Numata Y, Kobayashi T, Hino-Fukuyo N, Fujiwara I, Kure S. Hypoperfusion in caudate nuclei in patients with brain-lung-thyroid syndrome. J Neurol Sci 2011; 315:77-81. [PMID: 22166853 DOI: 10.1016/j.jns.2011.11.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2011] [Revised: 11/11/2011] [Accepted: 11/15/2011] [Indexed: 02/02/2023]
Abstract
Mutations in NKX2-1 cause neurological, pulmonary, and thyroid hormone impairment. Recently, the disease was named brain-lung-thyroid syndrome. Here, we report three patients with brain-lung-thyroid syndrome. All patients were unable to walk until 24 months of age, and still have a staggering gait, without mental retardation. They have also had choreoathetosis since early infancy. Genetic analysis of NKX2-1 revealed a novel missense mutation (p.Val205Phe) in two patients who were cousins and their maternal families, and a novel 2.6-Mb deletion including NKX2-1 on chromosome 14 in the other patient. Congenital hypothyroidism was not detected on neonatal screening in the patient with the missense mutation, and frequent respiratory infections were observed in the patient with the deletion in NKX2-1. Oral levodopa did not improve the gait disturbance or involuntary movement. The results of (99m)Tc-ECD single-photon emission computed tomography (ECD-SPECT) analyzed using the easy Z-score imaging system showed decreased cerebral blood flow in the bilateral basal ganglia, especially in the caudate nuclei, in all three patients, but no brain magnetic resonance imaging (MRI) abnormalities. These brain nuclear image findings indicate that NKX2-1 haploinsufficiency causes dysfunction of the basal ganglia, especially the caudate nuclei, resulting in choreoathetosis and gait disturbance in this disease.
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Affiliation(s)
- Mitsugu Uematsu
- Department of Pediatrics, Tohoku University School of Medicine, Sendai, Japan.
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13
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Pyun JA, Kang H, Kim J, Cha DH, Kwack K. Thyroglobulin gene is associated with premature ovarian failure. Fertil Steril 2010; 95:397-400. [PMID: 20864102 DOI: 10.1016/j.fertnstert.2010.08.038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2010] [Revised: 07/05/2010] [Accepted: 08/18/2010] [Indexed: 02/06/2023]
Abstract
Variants of the thyroglobulin gene were significantly associated with premature ovarian failure in a Korean population. Three single nucleotide polymorphisms and one haplotype were found to be associated with a significant increase in the risk for premature ovarian failure.
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Affiliation(s)
- Jung-A Pyun
- Department of Biomedical Science, College of Life Science, CHA University, Seongnam, Republic of Korea
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14
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Hüffmeier U, Tietze HU, Rauch A. Severe skeletal dysplasia caused by undiagnosed hypothyroidism. Eur J Med Genet 2007; 50:209-15. [PMID: 17433800 DOI: 10.1016/j.ejmg.2007.02.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2007] [Accepted: 02/27/2007] [Indexed: 11/26/2022]
Abstract
Due to increased awareness of early clinical signs and introduction of neonatal screening for congenital hypothyroidism, long-term untreated hypothyroidism has become rare. Nevertheless, neonatal screening for congenital hypothyroidism is not performed in all countries, and not every affected patient might be picked up by neonatal screening alone. Here we describe a case of congenital hypothyroidism due to an ectopic thyroid that was not diagnosed for 13 years and resulted in severe skeletal changes beside mental disablement. The patient showed coarse facial features (hypertelorism, broad flat nasal bridge, broad face) and a severe truncal shortening due to kyphoscoliosis of the spine. X-rays detected highly retarded bone age, a widely opened anterior fontanelle, immature, flat bodies of the vertebra with ventral beaked deformities mainly in the lumbar region and no ossification centres in the head of the femurs. In this patient we found no evidence for a mutation of the PAX8 gene known to cause an ectopic and/or hypoplastic thyroid.
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Affiliation(s)
- Ulrike Hüffmeier
- Institute of Human Genetics, University Hospital Erlangen, Friedrich-Alexander University of Erlangen-Nuremberg, Schwabachanlage 10, Erlangen, Germany.
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15
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Lanzerath K, Bettendorf M, Haag C, Kneppo C, Schulze E, Grulich-Henn J. Screening for Pax8 Mutations in Patients with Congenital Hypothyroidism in South-West Germany. Horm Res Paediatr 2006; 66:96-100. [PMID: 16763387 DOI: 10.1159/000093799] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2005] [Accepted: 04/21/2006] [Indexed: 11/19/2022] Open
Abstract
AIMS To study the frequency of mutations in the Pax8 gene in a cohort of patients with congenital hypothyroidism (CH) in South West Germany. METHODS A cohort of 95 patients with CH (60 females, 35 males), identified in our newborn screening program, was analyzed for mutations in Pax8 by single-stranded conformational polymorphism (SSCP) and DNA sequencing. RESULTS SSCP analysis and direct sequencing of exon 3 of a female patient with a hypoplastic thyroid gland revealed two heterozygous mutations in Pax8 resulting in a transition of T to C (codon 34) and G to A (codon 35), replacing isoleucine by threonine and valine by isoleucine. Using allele-specific PCR we could demonstrate that both mutations are located on the same allele. Furthermore, a polymorphism was documented in 24 patients with thyroid hypoplasia in intron 6 at nucleotide +51 (CC, GG, CG). Comparison of the polymorphisms between hypothyroid patients and controls revealed no significant differences suggesting that this polymorphism does not play a role in the pathogenesis of hypothyroidism. No further mutations or polymorphisms were found in the cohort. CONCLUSIONS These findings confirm the contribution of mutations in the Pax8 gene to the etiology of thyroid dysgenesis with a variable penetrance, but also demonstrate the rare overall incidence in CH.
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Affiliation(s)
- Kirsten Lanzerath
- Division of Pediatric Endocrinology and Diabetology, Department of Pediatrics, University of Heidelberg, Heidelberg, Germany
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16
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Okino K, Nagai H, Nakayama H, Doi D, Yoneyama K, Konishi H, Takeshita T. Inactivation of Crk SH3 domain-binding guanine nucleotide-releasing factor (C3G) in cervical squamous cell carcinoma. Int J Gynecol Cancer 2006; 16:763-71. [PMID: 16681758 DOI: 10.1111/j.1525-1438.2006.00352.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
C3G, a Crk SH3 domain-binding guanine nucleotide-releasing factor functions as a guanine nucleotide exchange factor for Rap1. It is activated via the Crk adaptor protein and plays an important role in transducing signals from receptors on the cell surface to the nucleus via the Ras/Raf/MAPK signal transduction pathway. However, since the experimental data result in pleiotropic effects in the cascade manner, its precise function remains unclear. Here we examined the C3G expression in cervical squamous cell carcinomas and found a marked decrease in the expression of C3G in a high incidence of said samples. In addition, we also demonstrated frequent hypermethylation of C3G, which resulted in an inactivation mechanism of the gene. Clinical and pathologic data failed to show any relationship between the human papillomavirus infection and the down-regulation of C3G. These results indicate that inactivation of C3G by de novo methylation plays an important role in the development of cervical squamous cell carcinoma.
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Affiliation(s)
- K Okino
- Department of Obstetrics and Gynecology, Nippon Medical School, Bunkyo-ku, Tokyo, Japan
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17
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Abstract
To date, various genetic defects impairing the biosynthesis of thyroid hormone have been identified. These congenital heterogeneous disorders result from mutations of genes involved in many steps of thyroid hormone synthesis, storage, secretion, delivery, or utilization. In contrast to thyroid dyshormonogenesis, the elucidation of the underlying etiology of most cases of thyroid dysgenesis is much less understood. It is suggested that genetic factors might play a role in some cases of thyroid dysgenesis and the best candidate genes involved are those encoding transcription factors known to play a role in the embryonic development of the thyroid gland. Moreover, discordance for thyroid dysgenesis is the rule for monozygotic twins as recently reported and this may result from epigenetic phenomena, early somatic mutations, or postzygotic events. In the final part of this review the molecular defects involved in proteins that transport thyroid hormone in the circulation are described: thyroxine-binding globulin (TBG), transtiretin and albumin, that may be associated with altered thyroid function tests and other pathologic conditions such as amyloidotic polyneuropathy.
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Affiliation(s)
- Meyer Knobel
- Thyroid Unit, Division of Endocrinology, University of Sao Paulo Medical School, Sao Paulo, Brazil
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18
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Rivolta CM, Moya CM, Mendive FM, Targovnik HM. Genotyping and characterization of two polymorphic microsatellite markers located within introns 29 and 30 of the human thyroglobulin gene. Thyroid 2002; 12:773-9. [PMID: 12481942 DOI: 10.1089/105072502760339334] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The purpose of the present work was to characterize two new polymorphic microsatellite markers in the thyroglobulin gene. TGrI29 and TGrI30 repeats are located within introns 29 and 30, respectively. Genetic studies were carried out by using polymerase chain reaction (PCR) followed by denaturing polyacrilamide gel electrophoresis. TGrI29 exhibited clearly 4 distinguishable alleles ranging from 197 to 203 base pair (bp) in length and TGrI30 showed 8 alleles ranging from 502 to 542 bp. We characterized the two markers by determinating allele frequencies and measures of variation. The heterozygosities (HET) observed of TGrI29 and TGrI30 were 0.859 and 0.522, respectively. The polymorphism information contents (PIC) were 0.471 and 0.434, respectively. No significant differences from Hardy-Weinberg values were found for these two systems. The PCR products of each allele were cloned using the pGEM-T Easy vector and directly sequenced by Taq polymerase-based chain terminator method. Sequencing analysis indicated that both loci are complex repeats, TGrI29 containing two types of variable motifs (tc)n and (tg)n, and TGrI30 a tetra-nucleotide tandem units (atcc)n. In two TGrI29 alleles and one TGrI30 allele were found two different subtypes in each one, with the same molecular weights but different distribution of the tandem repeats. In conclusion, both microsatellites analyzed are highly informative polymorphic markers and can be used in linkage studies in families with congenital hypothyroidism or autoimmunity thyroid diseases.
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Affiliation(s)
- Carina M Rivolta
- Laboratorio de Biología Molecular, Cátedra de Genética y Biología Molecular, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Buenos Aires, Argentina
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19
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Abstract
Over the past three decades, extensive genetic, physical, transcript, and sequence maps have assisted in the mapping of over 30 genetic diseases and in the identification of over 550 genes on human chromosome 14. Additional genetic disorders were assigned to chromosome 14 by studying either constitutional or acquired chromosome aberrations of affected subjects. Studies of benign and malignant tumours by karyotype analyses and by allelotyping with a panel of polymorphic genetic markers have further suggested the presence of several tumour suppressor loci on chromosome 14. The search for disease genes on human chromosome 14 has also been achieved by exploiting the human-mouse comparative maps. Research on uniparental disomy and on the search for imprinted genes has supported evidence of epigenetic inheritance as a result of imprinting on human chromosome 14. This review focuses on the current developments on human chromosome 14 with respect to genetic maps, physical maps, transcript maps, sequence maps, genes, diseases, mouse-human comparative maps, and imprinting.
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Affiliation(s)
- D Kamnasaran
- Department of Medical Genetics, University of Alberta, Edmonton, Alberta T6G 2H7, Canada
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20
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Targovnik HM, Rivolta CM, Mendive FM, Moya CM, Vono J, Medeiros-Neto G. Congenital goiter with hypothyroidism caused by a 5' splice site mutation in the thyroglobulin gene. Thyroid 2001; 11:685-90. [PMID: 11484898 DOI: 10.1089/105072501750362763] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
In this work we have extended our initial molecular studies of a consanguineous family with two affected goitrous siblings (H.S.N. and Ac.S.N.) with defective thyroglobulin (Tg) synthesis and secretion because of a homozygotic deletion of a fragment of 138 nucleotides (nt) in the central region of the Tg mRNA, identified previously in H.S.N. In order to identify the intron/exon boundaries and to analyze the regions responsible for pre-mRNA processing corresponding to a 138 nt deletion, we performed a screening of a human genomic library. The intron/exon junction sequences were determined from one positive clone by sequencing both strands of the DNA template. The results showed that the deletion mapped between positions 5549 and 5686 of the Tg mRNA and corresponded to exon 30. The positions of the exon limits differed by three nucleotides from the previously reported data obtained from direct sequencing of the deleted reverse transcriptase-polymerase chain reaction fragment from H.S.N. These variations are because the intron/exon junctions in this region were not available at the time when the deletion was first described. The deletion does not affect the reading frame of the resulting mRNA and is potentially fully translatable into a Tg polypeptide chain that is shortened by 46 residues. The same 138 nt deletion was observed in reverse transcriptase-polymerase chain reaction studies performed in the thyroid tissues from Ac.S.N. Genomic DNA analysis showed that a G to T transversion was observed at position +1 in the donor site of intron 30. Both affected patients (H.S.N. and Ac.S.N.) are homozygous for the mutation whereas the normal sister (At.S.N.) had a normal allele pattern. The functional consequences of the deletion are related to structural changes in the protein molecule that either could modify the normal routing of the translation product through the membrane system of the cell or could impair the coupling reaction. Probably the mutant Tg polypeptide might be functionally active in the production of thyroid hormone, because in the presence of a normal iodine ingestion (approximately 150 microg/day), Ac.S.N. was able to maintain normal serum levels of total triiodothyronine (T3) associated with relatively low serum total thyroxine (T4) with normal somatic development without signs of brain damage.
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Affiliation(s)
- H M Targovnik
- División Genética, Hospital de Clínicas José de San Martin, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Argentina.
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Iwatani N, Mabe H, Devriendt K, Kodama M, Miike T. Deletion of NKX2.1 gene encoding thyroid transcription factor-1 in two siblings with hypothyroidism and respiratory failure. J Pediatr 2000; 137:272-6. [PMID: 10931427 DOI: 10.1067/mpd.2000.107111] [Citation(s) in RCA: 105] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Thyroid transcription factor-1 encoded by the NKX2.1 gene is a candidate regulator of thyroid and lung morphogenesis and function in humans. We report 2 female siblings with congenital thyroid dysfunction and recurrent acute respiratory distress carrying a heterozygous deletion of chromosome 14q12-13.3, resulting in haploinsufficiency for the NKX2.1 gene. This observation further supports a physiologic role for thyroid transcription factor-1 in early human thyroid and pulmonary function.
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Affiliation(s)
- N Iwatani
- Department of Child Development, Kumamoto University School of Medicine, Kumamoto, Japan
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22
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Brunetti A, Chiefari E, Filetti S, Russo D. The 3',5'-cyclic adenosine monophosphate response element binding protein (CREB) is functionally reduced in human toxic thyroid adenomas. Endocrinology 2000; 141:722-30. [PMID: 10650954 DOI: 10.1210/endo.141.2.7331] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In human normal thyrocytes, the cAMP-responsive signaling pathway plays a central role in gene regulation, cell proliferation, and differentiation. Constitutive activation of the cAMP signal transduction system has been documented in thyroid autonomously hyperfunctioning adenomas in which activating mutations in either the TSH receptor gene or the Gsalpha protein gene (gsp oncogene) have been described. The molecular mechanism whereby cAMP induces thyrocyte proliferation is unknown, but recent evidence suggests that the transcription factor cAMP response element binding protein (CREB) may serve as an important biochemical intermediate in this proliferative response. Herein we have investigated the expression of CREB in normal and tumoral thyroid tissues from a series of ten unrelated patients with autonomously hyperfunctioning adenomas, previously screened for mutations in the TSH receptor and Gsalpha genes. In all tumors examined, the expression of the activated, phosphorylated form of CREB was markedly reduced compared with that of the corresponding paired normal thyroid tissue, and this reduction was independent of the presence of mutations in the TSH receptor gene and Gsalpha gene. Moreover, no correlation was observed in these tissues between CREB phosphorylation and either protein kinase A activity or protein phosphatase expression. Thus, these data suggest that in human hyperfunctioning thyroid adenomas, the PKA/CREB system does not play a role in cell proliferation.
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Affiliation(s)
- A Brunetti
- Cattedra di Endocrinologia, Dipartimento di Medicina Sperimentale e Clinica, Facolta di Medicina e Chirurgia, Universita degli Studi di Catanzaro, Italy
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23
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Gilbert F. Disease genes and chromosomes: disease maps of the human genome. Chromosome 14. GENETIC TESTING 2000; 3:379-91. [PMID: 10627948 DOI: 10.1089/gte.1999.3.379] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- F Gilbert
- Cornell University Medical College, New York, NY 10021, USA.
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van de Graaf SA, Cammenga M, Ponne NJ, Veenboer GJ, Gons MH, Orgiazzi J, de Vijlder JJ, Ris-Stalpers C. The screening for mutations in the thyroglobulin cDNA from six patients with congenital hypothyroidism. Biochimie 1999; 81:425-32. [PMID: 10403171 DOI: 10.1016/s0300-9084(99)80091-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The six patients described in this study were clinically diagnosed with congenital hypothyroidism. Based on clinical and pathophysiological parameters, the cause of the thyroid dyshormonogenesis was suspected to be a defect in the synthesis of thyroglobulin, the matrix protein for thyroid hormone synthesis in the thyroid gland. After RNA isolation from six goitrous tissues and control thyroid tissues, RT-PCR was used to amplify 20 overlapping thyroglobulin (TG) cDNA fragments. Two alternative splice transcripts were identified: a transcript with a deletion of nucleotides 177-274 and a transcript with a deletion of nucleotides 3430-3736 that result in frame shifts and the introduction of premature stop codons. Two alternatively spliced transcripts not changing the reading frame were also identified: a transcript containing a deletion of nucleotides 4529-4699 and a transcript with a deletion of nucleotides 7301-7561. All these transcripts were expressed in thyroid tissue of both patients and controls. Nucleotide sequence analysis and comparison to the revised TG sequence (1997) revealed one revision and eight polymorphisms that did not result in amino acid changes and four polymorphisms that did change amino acid codons. In three patients a homozygous mutation was present at nucleotide position 229, causing a glycine to serine amino acid substitution. The clinical description 'thyroglobulin synthesis defect' in this population cannot be explained by major mutations in the coding region of the TG gene. Furthermore, the presence and level of expression of the alternatively spliced transcripts do not co-segregate with thyroid dyshormonogenesis, since in normal thyroid tissue the same alternatively spliced transcripts are present.
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Affiliation(s)
- S A van de Graaf
- Laboratory Pediatric Endocrinology, Academic Medical Center, University of Amsterdam, Emma Children's Hospital AMC, The Netherlands
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Ros P, Rossi DL, Acebrón A, Santisteban P. Thyroid-specific gene expression in the multi-step process of thyroid carcinogenesis. Biochimie 1999; 81:389-96. [PMID: 10401674 DOI: 10.1016/s0300-9084(99)80086-8] [Citation(s) in RCA: 69] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Thyroid-specific transcription factors TTF-1 and Pax-8 play a decisive role in the determination and maintenance of cellular phenotype activating thyroglobulin (Tg), thyroperoxidase (TPO), thyrotropin receptor (TSH-R) and the sodium/iodide symporter (NIS) gene transcription. In the present work, we have studied the expression of TTF-1 and Pax-8 and their target genes in samples derived from thyroid neoplasms of follicular origin, as well as in medullary carcinoma (MTC), obtained from surgery or from fine needle aspiration (FNA) biopsies. The results show that TTF-1 and Pax-8 are expressed in well differentiated adenomas and that their expression decreases in less differentiated papillary and follicular carcinomas and is lost in undifferentiated anaplastic carcinomas. Parallel levels of Tg, TPO and TSH-R expression were found in the same neoplasm samples. Interestingly TSH-R and TTF-1 gene expression was found in MTC samples. Furthermore, the expression of the thyroid-specific genes and their transcription factors is lost in thyroid cells derived from follicular, papillary and anaplastic human carcinomas. In these cells, Tg, TPO and TSH-R promoter activities were absent. Cotransfection with expression vectors for TTF-1 and Pax-8 resulted in the stimulation of transcription to a different extent for each promoter. These results may be clinically relevant for the evaluation and prognosis of thyroid cancer since the loss of specific markers correlates with the degree of tumor differentiation.
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Affiliation(s)
- P Ros
- Instituto de Investigaciones Biomédicas, Consejo Superior de Investigaciones Científicas, Madrid, Spain
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Targovnik HM, Frechtel GD, Mendive FM, Vono J, Cochaux P, Vassart G, Medeiros-Neto G. Evidence for the segregation of three different mutated alleles of the thyroglobulin gene in a Brazilian family with congenital goiter and hypothyroidism. Thyroid 1998; 8:291-7. [PMID: 9588493 DOI: 10.1089/thy.1998.8.291] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
We have previously reported a Brazilian family with congenital goiter, hypothyroidism, and marked impairment of thyroglobulin (Tg) synthesis. Analysis of the Tg mRNA in the goiter of one of the siblings revealed a cytosine to thymine transition creating a stop codon at position 1510. This point mutation is removed from the majority of Tg mRNA transcripts by the preferential generation in the goiter of a 171 nt deleted Tg mRNA by alternative splicing. The nonsense mutation destroys a TaqI site at this position in the mutant Tg gene. Using polymerase chain reaction (PCR) amplification and TaqI digestion we found that two siblings affected with goiter and hypothyroidism, as well as the father and three siblings with normal thyroid function, are all heterozygous for the nonsense mutation. This implies that an additional mutation must be present in the affected individuals, generating a compound heterozygote genotype. A new polymorphism within the thyroglobulin gene represented by three alleles has been detected. This was documented by the TaqI restriction enzyme and phTgM3 probe hybridization that showed a three allelic polymorphism with fragment sizes of 16.5 kb (allele A), 14.5 kb (allele B) and 11.0 kb (allele C). Segregation analysis of these alleles in the family indicated that the two affected siblings were homozygous for the allele C. In contrast the unaffected father and three other siblings, who carried the nonsense mutation, were heterozygous for alleles B and C. Analysis of the Tg genotypes implies that two additional mutations of the Tg gene must segregate in this family to account for the observed phenotypes.
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Affiliation(s)
- H M Targovnik
- Cátedra de Genética y Biología Molecular, Hospital de Clínicas José de San Martín, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Argentina
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Mascia A, De Felice M, Lipardi C, Gentile R, Calì G, Zannini M, Di Lauro R, Nitsch L. Transfection of TTF-1 gene induces thyroglobulin gene expression in undifferentiated FRT cells. BIOCHIMICA ET BIOPHYSICA ACTA 1997; 1354:171-81. [PMID: 9396634 DOI: 10.1016/s0167-4781(97)00127-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The thyroglobulin gene, the substrate for thyroid hormone biosynthesis, is not expressed in the FRT cell line, which, even though it manifests the polarised epithelial phenotype, does not express any of the thyroid functional properties. Two transcription factors, TTF-1 and Pax-8, have been implicated in thyroid specific expression of the thyroglobulin gene. FRT cells contain Pax-8 but they lack TTF-1. In this paper, we show that transfection of TTF-1 expression vectors in FRT cells results in activation of thyroglobulin gene expression. If the expression vector encoded for TTF-1-ER, a fusion gene coding for the entire TTF-1 protein fused to the hormone-binding domain of the steroid receptor, under the control of the RSV promoter, thyroglobulin gene expression was controlled by estrogen. These data provide a direct demonstration that TTF-1 activates the chromosomal thyroglobulin promoter. Since transfection of TTF-1 expression vectors in non-thyroid cell types did not result in thyroglobulin gene expression, it is suggested that Pax-8, in addition, perhaps, to a specific cellular environment, might be required for thyroid specific expression of the thyroglobulin gene.
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Affiliation(s)
- A Mascia
- Centro di Endocrinologia ed Oncologia Sperimentale del CNR - Dipartimento di Biologia e Patologia Cellulare e Molecolare, Università degli Studi di Napoli Federico II, Naples, Italy
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Perna MG, Civitareale D, De Filippis V, Sacco M, Cisternino C, Tassi V. Absence of mutations in the gene encoding thyroid transcription factor-1 (TTF-1) in patients with thyroid dysgenesis. Thyroid 1997; 7:377-81. [PMID: 9226206 DOI: 10.1089/thy.1997.7.377] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Thyroid transription factor-1 (TTF-1) is a homeodomain-containing nuclear transcription factor, important in regulation of the thyroid-specific genes thyroglobulin (Tg), thyroperoxidase (TPO), and thyrotropin receptor (TSHR). TTF-1 is an early biochemical marker of thyroid differentiation, essential for thyroid development and maintenance of the thyroid differentiated state. It is possible that mutations in titf1 gene encoding TTF-1 could result in failure of the thyroid gland to develop. Single strand conformation polymorphism (SSCP) was used to detect the presence of titf1 gene mutation in a group of 15 patients with congenital hypothyroidism. The etiology of the congenital hypothyroidism included thyroid agenesis (9), sublingual ectopic thyroid (4), and severe hypoplasia (2). The analysis did not identify any titf1 gene mutation, among these patients. These results rule out the presence of titf1 mutations, at least in the coding region, in our thyroid dysgenesis patients. Mutations in titf1 coding region may be an extremely rare event, and was not detected in our small sample size or, alternatively, such a mutant might even be viable since TTF-1 plays an important role in lung, brain, and pituitary development.
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Affiliation(s)
- M G Perna
- Research Laboratory, Endocrinology Division, Istituto di Medicina Sperimentale, Rome, Italy
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Durocher D, Chen CY, Ardati A, Schwartz RJ, Nemer M. The atrial natriuretic factor promoter is a downstream target for Nkx-2.5 in the myocardium. Mol Cell Biol 1996; 16:4648-55. [PMID: 8756621 PMCID: PMC231464 DOI: 10.1128/mcb.16.9.4648] [Citation(s) in RCA: 134] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
The recently described NK2 family of homeodomain proteins are key developmental regulators. In Drosophila melanogaster, two members of this family, bagpipe and tinman, are required for visceral and cardiac mesoderm formation, respectively. In vertebrates, tinman appears to represent a family of closely related NK2 genes, including Nkx-2.5, that are expressed at an early stage in precardiac cells. Consistent with a role for Nkx-2.5 in heart development, inactivation of the Nkx-2.5 gene in mice causes severe cardiac malformations and embryonic lethality. However, little is known about the molecular action of Nkx-2.5 and its targets in cardiac muscle. In this paper, we report the identification and characterization of a functional and highly conserved Nkx-2.5 response element, termed the NKE, in the proximal region of the cardiac atrial natriuretic factor (ANF) promoter. The NKE is composed of two near-consensus NK2 binding sites that are each able to bind purified Nkx-2.5. The NKE is sufficient to confer cardiac cell-specific activity to a minimal TATA-containing promoter and is required for Nkx-2.5 activation of the ANF promoter in heterologous cells. Interestingly, in primary cardiocyte cultures, the NKE contributes to ANF promoter activity in a chamber- and developmental stage-specific manner, suggesting that Nkx-2.5 and/or other related cardiac proteins may play a role in chamber specification. This work provides the identification of a direct target for NK2 homeoproteins in the heart and lays the foundation for further molecular analyses of the role of Nkx-2.5 and other NK2 proteins in cardiac development.
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Affiliation(s)
- D Durocher
- Laboratoire de Développement et Différenciation Cardiaques, Institut de Recherches Cliniques de Montréal, Quebec, Canada
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