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DeBoy EA, Nicosia AM, Liyanarachchi S, Iyer SS, Shah MH, Ringel MD, Brock P, Armanios M. Telomere-lengthening germline variants predispose to a syndromic papillary thyroid cancer subtype. Am J Hum Genet 2024:S0002-9297(24)00121-6. [PMID: 38688277 DOI: 10.1016/j.ajhg.2024.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 04/11/2024] [Accepted: 04/11/2024] [Indexed: 05/02/2024] Open
Abstract
Papillary thyroid cancer (PTC) is the most common endocrine malignancy. 10% to 15% of individuals show familial clustering with three or more affected members, but the factors underlying this risk are unknown. In a group of recently studied individuals with POT1 pathogenic variants and ultra-long telomere length, PTC was the second most common solid tumor. We tested whether variants in POT1 and four other telomere-maintenance genes associated with familial cancer underlie PTC susceptibility. Among 470 individuals, we identified pathogenic or likely pathogenic variants in three genes encoding telomere-binding proteins: POT1, TINF2, and ACD. They were found in 4.5% and 1.5% of familial and unselected cases, respectively. Individuals harboring these variants had ultra-long telomere length, and 15 of 18 (83%) developed other cancers, of which melanoma, lymphoma, and sarcoma were most common. Among individuals with PTC and melanoma, 22% carried a deleterious germline variant, suggesting that a long telomere syndrome might be clinically recognizable. Successive generations had longer telomere length than their parents and, at times, developed more cancers at younger ages. Tumor sequencing identified a single oncogenic driver, BRAF p.Val600Glu, in 10 of 10 tumors studied, but no telomere-maintenance mechanism, including at the TERT promoter. These data identify a syndromic subset of PTCs with locus heterogeneity and telomere lengthening as a convergent mechanism. They suggest these germline variants lower the threshold to cancer by obviating the need for an acquired telomere-maintenance mechanism in addition to sustaining the longevity of oncogenic mutations.
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Affiliation(s)
- Emily A DeBoy
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Medical Scientist Training Program, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Telomere Center at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Anna M Nicosia
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Telomere Center at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | | | - Sheila S Iyer
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Telomere Center at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Manisha H Shah
- Department of Internal Medicine, Columbus, OH, USA; The Ohio State University Comprehensive Cancer Center, The Ohio State University, Columbus, OH, USA
| | - Matthew D Ringel
- Department of Molecular Medicine and Therapeutics, Columbus, OH, USA; Department of Internal Medicine, Columbus, OH, USA; The Ohio State University Comprehensive Cancer Center, The Ohio State University, Columbus, OH, USA
| | - Pamela Brock
- Department of Internal Medicine, Columbus, OH, USA; The Ohio State University Comprehensive Cancer Center, The Ohio State University, Columbus, OH, USA
| | - Mary Armanios
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Department of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Telomere Center at Johns Hopkins, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
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Tsatsakis A, Oikonomopoulou T, Nikolouzakis TK, Vakonaki E, Tzatzarakis M, Flamourakis M, Renieri E, Fragkiadaki P, Iliaki E, Bachlitzanaki M, Karzi V, Katsikantami I, Kakridonis F, Hatzidaki E, Tolia M, Svistunov AA, Spandidos DA, Nikitovic D, Tsiaoussis J, Berdiaki A. Role of telomere length in human carcinogenesis (Review). Int J Oncol 2023; 63:78. [PMID: 37232367 PMCID: PMC10552730 DOI: 10.3892/ijo.2023.5526] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 05/11/2023] [Indexed: 05/27/2023] Open
Abstract
Cancer is considered the most important clinical, social and economic issue regarding cause‑specific disability‑adjusted life years among all human pathologies. Exogenous, endogenous and individual factors, including genetic predisposition, participate in cancer triggering. Telomeres are specific DNA structures positioned at the end of chromosomes and consist of repetitive nucleotide sequences, which, together with shelterin proteins, facilitate the maintenance of chromosome stability, while protecting them from genomic erosion. Even though the connection between telomere status and carcinogenesis has been identified, the absence of a universal or even a cancer‑specific trend renders consent even more complex. It is indicative that both short and long telomere lengths have been associated with a high risk of cancer incidence. When evaluating risk associations between cancer and telomere length, a disparity appears to emerge. Even though shorter telomeres have been adopted as a marker of poorer health status and an older biological age, longer telomeres due to increased cell growth potential are associated with the acquirement of cancer‑initiating somatic mutations. Therefore, the present review aimed to comprehensively present the multifaceted pattern of telomere length and cancer incidence association.
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Affiliation(s)
- Aristidis Tsatsakis
- Laboratory of Toxicology, School of Medicine, University of Crete, 71003 Heraklion
| | - Tatiana Oikonomopoulou
- Laboratory of Toxicology, School of Medicine, University of Crete, 71003 Heraklion
- Department of Anatomy, School of Medicine, University of Crete, 71003 Heraklion
| | - Taxiarchis Konstantinos Nikolouzakis
- Laboratory of Toxicology, School of Medicine, University of Crete, 71003 Heraklion
- Department of Anatomy, School of Medicine, University of Crete, 71003 Heraklion
| | - Elena Vakonaki
- Laboratory of Toxicology, School of Medicine, University of Crete, 71003 Heraklion
| | - Manolis Tzatzarakis
- Laboratory of Toxicology, School of Medicine, University of Crete, 71003 Heraklion
| | | | - Elisavet Renieri
- Laboratory of Toxicology, School of Medicine, University of Crete, 71003 Heraklion
| | | | - Evaggelia Iliaki
- Laboratory of Microbiology, University Hospital of Heraklion, 71500 Heraklion
| | - Maria Bachlitzanaki
- Department of Medical Oncology, Venizeleion General Hospital of Heraklion, 71409 Heraklion
| | - Vasiliki Karzi
- Laboratory of Toxicology, School of Medicine, University of Crete, 71003 Heraklion
| | - Ioanna Katsikantami
- Laboratory of Toxicology, School of Medicine, University of Crete, 71003 Heraklion
| | - Fotios Kakridonis
- Department of Spine Surgery and Scoliosis, KAT General Hospital, 14561 Athens
| | - Eleftheria Hatzidaki
- Department of Neonatology and Neonatal Intensive Care Unit (NICU), University Hospital of Heraklion, 71500 Heraklion
| | - Maria Tolia
- Department of Radiation Oncology, University Hospital of Crete, 71110 Heraklion, Greece
| | - Andrey A. Svistunov
- Department of Pharmacology, I.M. Sechenov First Moscow State Medical University (Sechenov University), 119146 Moscow, Russia
| | - Demetrios A. Spandidos
- Laboratory of Clinical Virology, School of Medicine, University of Crete, 71003 Heraklion, Greece
| | - Dragana Nikitovic
- Laboratory of Histology-Embryology, School of Medicine, University of Crete, 71003 Heraklion, Greece
| | - John Tsiaoussis
- Department of Anatomy, School of Medicine, University of Crete, 71003 Heraklion
| | - Aikaterini Berdiaki
- Laboratory of Histology-Embryology, School of Medicine, University of Crete, 71003 Heraklion, Greece
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Papillary Thyroid Cancer Affecting Multiple Family Members: A Case Report and Literature Review of Familial Nonmedullary Thyroid Cancer. Case Rep Endocrinol 2021; 2021:3472000. [PMID: 34691791 PMCID: PMC8536453 DOI: 10.1155/2021/3472000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 10/07/2021] [Indexed: 11/18/2022] Open
Abstract
Familial nonmedullary thyroid cancer (FNMTC) represents 5–10% of NMTC cases. Many controversies are associated with the FNMTC, namely, the minimum required number of affected family members to define the condition, aggressiveness, prognosis, and treatment and screening recommendations. Moreover, the genetic basis of the FNMTC has not yet been identified. We report a family diagnosed with FNMTC and present a comprehensive literature review of the condition. The index case was a 26-year-old male who was diagnosed with locally advanced papillary thyroid cancer (PTC). Then, his family members became worried and asked for a neck ultrasound. Four of his six siblings, in addition to his father, were diagnosed with PTC. In addition, two of his cousins were diagnosed. The patient underwent total thyroidectomy with bilateral neck dissection, and he received 2 doses of radioactive iodine (100 mCi each). Furthermore, one of his siblings required a second surgery with repeated radioactive iodine therapy. The index case genetic screening and whole-exome sequencing did not show any abnormalities. Future genetic and clinical research should focus on kindred with 3 or more affected individuals for better identification of the FNMTC susceptibility genes and to better guide management and screening recommendations.
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Capezzone M, Robenshtok E, Cantara S, Castagna MG. Familial non-medullary thyroid cancer: a critical review. J Endocrinol Invest 2021; 44:943-950. [PMID: 33025555 PMCID: PMC8049908 DOI: 10.1007/s40618-020-01435-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 09/25/2020] [Indexed: 12/14/2022]
Abstract
BACKGROUND Familial non-medullary thyroid carcinoma (FNMTC), mainly of papillary histotype (FPTC), is defined by the presence of the disease in two or more first-degree relatives in the absence of other known familial syndromes. With the increasing incidence of PTC in the recent years, the familial form of the disease has also become more common than previously reported and constitutes nearly 10% of all thyroid cancers. Many aspects of FNMTC are debated, concerning both clinical and genetic aspects. Several studies reported that, in comparison with sporadic PTCs, FPTCs are more aggressive at disease presentation, while other authors reported no differences in the clinical behavior of sporadic and familial PTCs. For this reason, recent guidelines do not recommend screening of family members of patients with diagnosis of differentiated thyroid cancer (DTC). FNMTC is described as a polygenic disorder associated with multiple low- to moderate-penetrance susceptibility genes and incomplete penetrance. At the moment, the genetic factors contributing to the development of FNMTC remain poorly understood, though many putative genes have been proposed in the recent years. PURPOSE Based on current literature and our experience with FNMTC, in this review, we critically discussed the most relevant controversies, including its definition, the genetic background and some clinical aspects as screening and treatment.
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Affiliation(s)
- M Capezzone
- Section of Endocrinology and Metabolism, Department of Medical, Surgical and Neurological Sciences, University of Siena, Policlinico Santa Maria alle Scotte, Viale Bracci 1, 53100, Siena, Italy
| | - E Robenshtok
- Institute of Endocrinology, Rabin Medical Center-Beilinson Hospital, Petach Tikva, Israel
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - S Cantara
- Section of Endocrinology and Metabolism, Department of Medical, Surgical and Neurological Sciences, University of Siena, Policlinico Santa Maria alle Scotte, Viale Bracci 1, 53100, Siena, Italy
| | - M G Castagna
- Section of Endocrinology and Metabolism, Department of Medical, Surgical and Neurological Sciences, University of Siena, Policlinico Santa Maria alle Scotte, Viale Bracci 1, 53100, Siena, Italy.
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Cirello V. Familial non-medullary thyroid carcinoma: clinico-pathological features, current knowledge and novelty regarding genetic risk factors. Minerva Endocrinol (Torino) 2020; 46:5-20. [PMID: 33045820 DOI: 10.23736/s2724-6507.20.03338-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Familial non-medullary thyroid cancer (FNMTC) constitutes 3-9% of all thyroid cancers and occurs in two or more first-degree relatives in the absence of predisposing environmental factors. Out of all FNMTC cases, only 5% are represented by syndromic forms (Gardner's Syndrome, familial adenomatous polyposis, Cowden's Syndrome, Carney complex 1, Werner's Syndrome and DICER1 syndrome), in which thyroid cancer occurs as a minor component and the genetic alterations are well-known. The non-syndromic forms represent the majority of all FNMTCs (95%), and the thyroid cancer is the predominant feature. Several low penetration susceptibility risk loci or genes (i.e. TTF1, FOXE1, SRGAP1, SRRM2, HABP2, MAP2K5, and DUOX2), here fully reviewed, have been proposed in recent years with a possible causative role, though the results are still not conclusive or reliable. FNMTC is indistinguishable from sporadic non-medullary thyroid cancer (sNMTC), which means that FNMTC cannot be diagnosed until at least one of the patient's first-degree relatives is affected by tumor. Some studies reported that the non-syndromic FNMTC is more aggressive than the sNMTC, being characterized by a younger age of onset and a higher rate of multifocal and bilateral tumors, extrathyroidal extension, lymph node metastasis, and recurrence. On the contrary, other studies did not find clinical differences between non-syndromic FNMTCs and sporadic cases. Here, I reported an extensive review on genetic and clinico-pathological features of the FNMTC, with particular attention on novel genetic risk factors for non-syndromic forms.
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Affiliation(s)
- Valentina Cirello
- Department of Endocrine and Metabolic Diseases, IRCCS Istituto Auxologico Italiano, Milan, Italy -
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McKelvey BA, Umbricht CB, Zeiger MA. Telomerase Reverse Transcriptase (TERT) Regulation in Thyroid Cancer: A Review. Front Endocrinol (Lausanne) 2020; 11:485. [PMID: 32849278 PMCID: PMC7412884 DOI: 10.3389/fendo.2020.00485] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 06/22/2020] [Indexed: 12/17/2022] Open
Abstract
Telomerase reverse transcriptase (TERT) is the catalytic subunit of the enzyme telomerase and is essential for telomerase activity. Upregulation of TERT expression and resulting telomerase activity occurs in the large majority of malignancies, including thyroid cancer. This upregulation results in continued cellular proliferation and avoidance of cellular senescence and cell death. In this review we will briefly introduce TERT and telomerase activity as it pertains to thyroid cancer and, highlight the effects of TERT on cancer cells. We will also explore in detail the different TERT regulatory strategies and how TERT is reactivated in thyroid cancer cells, specifically. These regulatory mechanisms include both activating single base pair TERT promoter mutations and epigenetic changes at the promoter, including changes in CpG methylation and histone modifications that affect chromatin structure. Further, regulation includes the allele-specific regulation of the TERT promoter in thyroid cancer cells harboring the TERT promoter mutation. These entail allele-specific transcriptional activator binding, DNA methylation, histone modifications, and mono-allelic expression of TERT. Lastly, TERT copy number alterations and alternative splicing are also implicated. Both amplifications of the TERT locus and increased full-length transcripts and decreased inactive and dominant negative isoforms result in active telomerase. Finally, the clinical significance of TERT in thyroid cancer is also reviewed.
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Affiliation(s)
- Brittany A. McKelvey
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, United States
- Department of Molecular Biology and Genetics, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Christopher B. Umbricht
- Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, United States
- Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Martha A. Zeiger
- Surgical Oncology Program, National Cancer Institute, National Institutes of Health, Bethesda, MD, United States
- *Correspondence: Martha A. Zeiger
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Kure S, Wada R, Naito Z. Relationship between genetic alterations and clinicopathological characteristics of papillary thyroid carcinoma. Med Mol Morphol 2019; 52:181-186. [DOI: 10.1007/s00795-019-00217-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 02/10/2019] [Indexed: 12/17/2022]
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Caria P, Dettori T, Frau DV, Lichtenzstejn D, Pani F, Vanni R, Mai S. Characterizing the three-dimensional organization of telomeres in papillary thyroid carcinoma cells. J Cell Physiol 2018; 234:5175-5185. [PMID: 30328617 DOI: 10.1002/jcp.27321] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 08/03/2018] [Indexed: 12/15/2022]
Abstract
The relationship between the three-dimensional (3D) nuclear telomere architecture and specific genetic alterations in papillary thyroid carcinoma (PTC), in particular in cancer stem-like cells (CSLCs), has not yet been investigated. We isolated thyrospheres containing CSLCs from B-CPAP, K1, and TPC-1 PTC-derived cell lines, representative of tumors with different genetic backgrounds within the newly identified BRAFV600E -like PTC subgroup, and used immortalized normal human thyrocytes (Nthy-ori 3.1) as control. We performed quantitative fluorescence in situ hybridization, 3D imaging, and 3D telomere analysis using TeloView software to examine telomere dysfunction in both parental and thyrosphere cells. Among the 3D telomere profile, a wide heterogeneity was observed, except for telomere intensity. Our findings indicate that CSLCs of each cell line had longer telomeres than parental cells, according to telomere intensity values, which correlate with telomere length. Indeed, the thyrosphere cells had lower numbers of lower-intensity telomeres (≤5,000 arbitrary fluorescent units, a.u.), compared with parental cancer cells, as well as parental control cells, (p < 0.0001). The B-CPAP thyrospheres showed a decreased number of higher intensity telomeres (>17,000 a.u.) than K1 and TPC-1 cells, as well as control cells (p < 0.0001). By selecting PTC-derived cell lines with different genetic backgrounds characteristic of BRAFV600E -like PTC subgroups, we demonstrate that thyrosphere cells with BRAFV600E and TP53 mutations show shorter telomeres than those harboring RET/PTC or BRAFV600E and wild-type TP53. Hence, our data reveal a trend towards a decrease in telomere shortening in CSLCs, representing the early cancer-promoting subpopulation, as opposed to parental cells representing the tumor bulk cells.
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Affiliation(s)
- Paola Caria
- Department of Biomedical Sciences, University of Cagliari, Cagliari, Italy
| | - Tinuccia Dettori
- Department of Biomedical Sciences, University of Cagliari, Cagliari, Italy
| | | | - Daniel Lichtenzstejn
- Department of Cell Biology, Research Institute of Oncology and Hematology, CancerCare Manitoba, University of Manitoba, Winnipeg, MB, Canada
| | - Fabiana Pani
- Department of Medical Sciences, University of Cagliari, Cagliari, Italy
| | - Roberta Vanni
- Department of Biomedical Sciences, University of Cagliari, Cagliari, Italy
| | - Sabine Mai
- Department of Cell Biology, Research Institute of Oncology and Hematology, CancerCare Manitoba, University of Manitoba, Winnipeg, MB, Canada
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Marques IJ, Moura MM, Cabrera R, Pinto AE, Simões-Pereira J, Santos C, Menezes FD, Montezuma D, Henrique R, Rodrigues Teixeira M, Leite V, Cavaco BM. Identification of somatic TERT promoter mutations in familial nonmedullary thyroid carcinomas. Clin Endocrinol (Oxf) 2017; 87:394-399. [PMID: 28502101 DOI: 10.1111/cen.13375] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 04/19/2017] [Accepted: 05/09/2017] [Indexed: 12/25/2022]
Abstract
OBJECTIVE The genes causing familial nonmedullary thyroid carcinoma (FNMTC) identified to date are only involved in a small fraction of the families. Recently, somatic mutations in TERT promoter region and in EIF1AX gene were reported in thyroid tumours of undefined familial status. The aim of this study was to investigate the role of TERT and EIF1AX mutations in familial thyroid tumours. DESIGN The promoter region of TERT was sequenced in leucocyte DNA of the probands from 75 FNMTC families. In thyroid tumours from 54 familial cases, we assessed somatic TERT promoter, RAS and BRAF hotspot mutations, and the whole EIF1AX gene. RESULTS No potentially pathogenic germline variants were identified in TERT in the 75 FNMTC families' probands. In the 54 carcinomas, we identified five cases (9%) with hotspot somatic TERT promoter mutations. BRAF mutations were found in 41% of the tumours. All TERT-positive samples were also positive for BRAF p.Val600Glu, and this co-occurrence was found to be statistically significant (P=.008). RAS mutations were detected in four tumours wild-type for TERT (7%). Evaluation of tumour mutation data together with the patients' clinicopathological features revealed a significant correlation between TERT plus BRAF mutations and advanced tumour stage (T4) (P=.020). No mutations were identified in EIF1AX. CONCLUSIONS The results of this study suggest that TERT promoter and EIF1AX mutations are not frequently involved in FNMTC aetiology. However, we show for the first time that TERT alterations are associated with familial thyroid tumour progression. Our data also suggest that TERT mutations are more often found in concomitance with BRAF mutations in advanced stages of FNMTC.
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Affiliation(s)
- Inês J Marques
- Unidade de Investigação em Patobiologia Molecular (UIPM), Instituto Português de Oncologia de Lisboa Francisco Gentil, Lisboa, Portugal
- Chronic Diseases Research Centre (CEDOC), Universidade Nova de Lisboa, Lisboa, Portugal
- Nova Medical School/Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Lisboa, Portugal
| | - Margarida M Moura
- Unidade de Investigação em Patobiologia Molecular (UIPM), Instituto Português de Oncologia de Lisboa Francisco Gentil, Lisboa, Portugal
| | - Rafael Cabrera
- Serviço de Anatomia Patológica, Instituto Português de Oncologia de Lisboa Francisco Gentil, Lisboa, Portugal
| | - António E Pinto
- Serviço de Anatomia Patológica, Instituto Português de Oncologia de Lisboa Francisco Gentil, Lisboa, Portugal
| | - Joana Simões-Pereira
- Unidade de Investigação em Patobiologia Molecular (UIPM), Instituto Português de Oncologia de Lisboa Francisco Gentil, Lisboa, Portugal
- Nova Medical School/Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Lisboa, Portugal
- Serviço de Endocrinologia, Instituto Português de Oncologia de Lisboa Francisco Gentil, Lisboa, Portugal
| | - Catarina Santos
- Serviço de Genética, Instituto Português de Oncologia do Porto Francisco Gentil, Porto, Portugal
| | - Francisco D Menezes
- Serviço de Anatomia Patológica, Instituto Português de Oncologia do Porto Francisco Gentil, Porto, Portugal
| | - Diana Montezuma
- Serviço de Anatomia Patológica, Instituto Português de Oncologia do Porto Francisco Gentil, Porto, Portugal
| | - Rui Henrique
- Serviço de Anatomia Patológica, Instituto Português de Oncologia do Porto Francisco Gentil, Porto, Portugal
- Departamento de Patologia e Imunologia Molecular, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
| | - Manuel Rodrigues Teixeira
- Serviço de Genética, Instituto Português de Oncologia do Porto Francisco Gentil, Porto, Portugal
- Departamento de Patologia e Imunologia Molecular, Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
| | - Valeriano Leite
- Unidade de Investigação em Patobiologia Molecular (UIPM), Instituto Português de Oncologia de Lisboa Francisco Gentil, Lisboa, Portugal
- Nova Medical School/Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Lisboa, Portugal
- Serviço de Endocrinologia, Instituto Português de Oncologia de Lisboa Francisco Gentil, Lisboa, Portugal
| | - Branca M Cavaco
- Unidade de Investigação em Patobiologia Molecular (UIPM), Instituto Português de Oncologia de Lisboa Francisco Gentil, Lisboa, Portugal
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Peiling Yang S, Ngeow J. Familial non-medullary thyroid cancer: unraveling the genetic maze. Endocr Relat Cancer 2016; 23:R577-R595. [PMID: 27807061 DOI: 10.1530/erc-16-0067] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 10/03/2016] [Indexed: 12/12/2022]
Abstract
Familial non-medullary thyroid cancer (FNMTC) constitutes 3-9% of all thyroid cancers. Out of all FNMTC cases, only 5% in the syndromic form has well-studied driver germline mutations. These associated syndromes include Cowden syndrome, familial adenomatous polyposis, Gardner syndrome, Carney complex type 1, Werner syndrome and DICER1 syndrome. It is important for the clinician to recognize these phenotypes so that genetic counseling and testing can be initiated to enable surveillance for associated malignancies and genetic testing of family members. The susceptibility chromosomal loci and genes of 95% of FNMTC cases remain to be characterized. To date, 4 susceptibility genes have been identified (SRGAP1 gene (12q14), TITF-1/NKX2.1 gene (14q13), FOXE1 gene (9q22.33) and HABP2 gene (10q25.3)), out of which only the FOXE1 and the HABP2 genes have been validated by separate study groups. The causal genes located at the other 7 FNMTC-associated chromosomal loci (TCO (19q13.2), fPTC/ PRN (1q21), FTEN (8p23.1-p22), NMTC1 (2q21), MNG1 (14q32), 6q22, 8q24) have yet to be identified. Increasingly, gene regulatory mechanisms (miRNA and enhancer elements) are recognized to affect gene expression and FNMTC tumorigenesis. With newer sequencing technique, along with functional studies, there has been progress in the understanding of the genetic basis of FNMTC. In our review, we summarize the FNMTC studies to date and provide an update on the recently reported susceptibility genes including novel germline SEC23B variant in Cowden syndrome, SRGAP1 gene, FOXE1 gene and HABP2 genes in non-syndromic FNMTC.
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Affiliation(s)
- Samantha Peiling Yang
- Endocrinology DivisionDepartment of Medicine, National University Hospital of Singapore, Singapore, Singapore
- Yong Loo Lin School of MedicineNational University of Singapore, Singapore, Singapore
| | - Joanne Ngeow
- Cancer Genetics ServiceDivision of Medical Oncology, National Cancer Centre, Singapore, Singapore
- Oncology Academic Clinical ProgramDuke-NUS Medical School, Singapore, Singapore
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Caria P, Cantara S, Frau DV, Pacini F, Vanni R, Dettori T. Genetic Heterogeneity of HER2 Amplification and Telomere Shortening in Papillary Thyroid Carcinoma. Int J Mol Sci 2016; 17:E1759. [PMID: 27775641 PMCID: PMC5085783 DOI: 10.3390/ijms17101759] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 09/20/2016] [Accepted: 10/12/2016] [Indexed: 02/05/2023] Open
Abstract
Extensive research is dedicated to understanding if sporadic and familial papillary thyroid carcinoma are distinct biological entities. We have previously demonstrated that familial papillary thyroid cancer (fPTC) cells exhibit short relative telomere length (RTL) in both blood and tissues and that these features may be associated with chromosome instability. Here, we investigated the frequency of HER2 (Human Epidermal Growth Factor Receptor 2) amplification, and other recently reported genetic alterations in sporadic PTC (sPTC) and fPTC, and assessed correlations with RTL and BRAF mutational status. We analyzed HER2 gene amplification and the integrity of ALK, ETV6, RET, and BRAF genes by fluorescence in situ hybridization in isolated nuclei and paraffin-embedded formalin-fixed sections of 13 fPTC and 18 sPTC patients. We analyzed BRAFV600E mutation and RTL by qRT-PCR. Significant HER2 amplification (p = 0.0076), which was restricted to scattered groups of cells, was found in fPTC samples. HER2 amplification in fPTCs was invariably associated with BRAFV600E mutation. RTL was shorter in fPTCs than sPTCs (p < 0.001). No rearrangements of other tested genes were observed. These findings suggest that the association of HER2 amplification with BRAFV600E mutation and telomere shortening may represent a marker of tumor aggressiveness, and, in refractory thyroid cancer, may warrant exploration as a site for targeted therapy.
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Affiliation(s)
- Paola Caria
- Department of Biomedical Sciences, University of Cagliari, Cittadella Universitaria, Monserrato 09042, Italy.
| | - Silvia Cantara
- Department of Medical, Surgical and Neurological Sciences, University of Siena, Siena 53100, Italy.
| | - Daniela Virginia Frau
- Department of Biomedical Sciences, University of Cagliari, Cittadella Universitaria, Monserrato 09042, Italy.
| | - Furio Pacini
- Department of Medical, Surgical and Neurological Sciences, University of Siena, Siena 53100, Italy.
| | - Roberta Vanni
- Department of Biomedical Sciences, University of Cagliari, Cittadella Universitaria, Monserrato 09042, Italy.
| | - Tinuccia Dettori
- Department of Biomedical Sciences, University of Cagliari, Cittadella Universitaria, Monserrato 09042, Italy.
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12
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Tavares C, Melo M, Cameselle-Teijeiro JM, Soares P, Sobrinho-Simões M. ENDOCRINE TUMOURS: Genetic predictors of thyroid cancer outcome. Eur J Endocrinol 2016; 174:R117-26. [PMID: 26510840 DOI: 10.1530/eje-15-0605] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Accepted: 10/28/2015] [Indexed: 12/20/2022]
Abstract
Genetic predictors of outcome are reviewed in the context of a disease--cancer--that can be (too) simplistically described as a 'successful, invasive clone of our own tissues'. Context has many faces that determine a thyroid cancer patient's outcome beyond the influence of genetic markers. There is also plenty of evidence on the prognostic meaning of the interplay between genetics and context/microenvironment factors (encapsulation, degree of invasion, staging, etc.). This review addresses only genetic alterations detected by molecular methods in surgically resected specimens, thus ruling out immunohistochemistry and (F)ISH, despite their crucial relevance as topographically oriented methods. For the sake of the discussion, well-differentiated carcinomas were divided into two main morphologic types: papillary carcinoma (classic and most variants) displaying BRAFV600E mutations and RET/papillary thyroid carcinoma rearrangements and the group of follicular patterned carcinomas that encompasses follicular carcinoma and the encapsulated form of follicular variant of papillary carcinoma, displaying RAS mutations and PAX8/PPARγ rearrangement. TERT promoter mutations have been recently described (and associated with distant metastases and reduced survival) in papillary and follicular carcinomas, as well as in poorly differentiated and undifferentiated carcinoma. TP53 mutations, previously thought to be restricted to less differentiated carcinomas, were also detected in papillary and follicular carcinoma and found to carry a guarded prognosis. Besides their putative importance for targeted therapies, the prognostic meaning of such mutations is discussed per se and in the setting of concurrent BRAF mutation.
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Affiliation(s)
- Catarina Tavares
- Instituto de Investigacão e Inovacão em SaúdeUniversidade do Porto, 4200-135 Porto, PortugalCancer BiologyInstitute of Molecular Pathology and Immunology of the University of Porto (IPATIMUP), Rua Dr Roberto Frias, s/n, 4200-465 Porto, PortugalMedical FacultyUniversity of Porto, Al. Prof. Hernâni Monteiro, P-4200 Porto, PortugalEndocrinologyDiabetes and Metabolism Department, Centro Hospitalar e Universitário de Coimbra, Praceta Mota Pinto, 3000-075 Coimbra, PortugalMedical FacultyUniversity of Coimbra, Azinhaga de Santa Comba, 3000-548 Coimbra, PortugalDepartment of PathologyMedical Faculty, Servicio Gallego de Salud-SERGAS, Clinical University Hospital, University of Santiago de Compostela, 15705 Santiago de Compostela, SpainDepartment of Pathology and OncologyMedical Faculty of Porto University, Porto, PortugalDepartment of PathologyHospital de S. João, Al. Prof. Hernâni Monteiro, P-4200 Porto, Portugal Instituto de Investigacão e Inovacão em SaúdeUniversidade do Porto, 4200-135 Porto, PortugalCancer BiologyInstitute of Molecular Pathology and Immunology of the University of Porto (IPATIMUP), Rua Dr Roberto Frias, s/n, 4200-465 Porto, PortugalMedical FacultyUniversity of Porto, Al. Prof. Hernâni Monteiro, P-4200 Porto, PortugalEndocrinologyDiabetes and Metabolism Department, Centro Hospitalar e Universitário de Coimbra, Praceta Mota Pinto, 3000-075 Coimbra, PortugalMedical FacultyUniversity of Coimbra, Azinhaga de Santa Comba, 3000-548 Coimbra, PortugalDepartment of PathologyMedical Faculty, Servicio Gallego de Salud-SERGAS, Clinical University Hospital, University of Santiago de Compostela, 15705 Santiago de Compostela, SpainDepartment of Pathology and OncologyMedical Faculty of Porto University, Porto, PortugalDepartment of PathologyHospital de S. João, Al. Prof. Hernâni Monteiro, P-4200 Porto, Portugal Instituto de Investigacão e Inovacão em SaúdeUniversidade do Porto, 4200-135 Porto, PortugalCancer BiologyInstitute of Molecular Pathology and
| | - Miguel Melo
- Instituto de Investigacão e Inovacão em SaúdeUniversidade do Porto, 4200-135 Porto, PortugalCancer BiologyInstitute of Molecular Pathology and Immunology of the University of Porto (IPATIMUP), Rua Dr Roberto Frias, s/n, 4200-465 Porto, PortugalMedical FacultyUniversity of Porto, Al. Prof. Hernâni Monteiro, P-4200 Porto, PortugalEndocrinologyDiabetes and Metabolism Department, Centro Hospitalar e Universitário de Coimbra, Praceta Mota Pinto, 3000-075 Coimbra, PortugalMedical FacultyUniversity of Coimbra, Azinhaga de Santa Comba, 3000-548 Coimbra, PortugalDepartment of PathologyMedical Faculty, Servicio Gallego de Salud-SERGAS, Clinical University Hospital, University of Santiago de Compostela, 15705 Santiago de Compostela, SpainDepartment of Pathology and OncologyMedical Faculty of Porto University, Porto, PortugalDepartment of PathologyHospital de S. João, Al. Prof. Hernâni Monteiro, P-4200 Porto, Portugal Instituto de Investigacão e Inovacão em SaúdeUniversidade do Porto, 4200-135 Porto, PortugalCancer BiologyInstitute of Molecular Pathology and Immunology of the University of Porto (IPATIMUP), Rua Dr Roberto Frias, s/n, 4200-465 Porto, PortugalMedical FacultyUniversity of Porto, Al. Prof. Hernâni Monteiro, P-4200 Porto, PortugalEndocrinologyDiabetes and Metabolism Department, Centro Hospitalar e Universitário de Coimbra, Praceta Mota Pinto, 3000-075 Coimbra, PortugalMedical FacultyUniversity of Coimbra, Azinhaga de Santa Comba, 3000-548 Coimbra, PortugalDepartment of PathologyMedical Faculty, Servicio Gallego de Salud-SERGAS, Clinical University Hospital, University of Santiago de Compostela, 15705 Santiago de Compostela, SpainDepartment of Pathology and OncologyMedical Faculty of Porto University, Porto, PortugalDepartment of PathologyHospital de S. João, Al. Prof. Hernâni Monteiro, P-4200 Porto, Portugal Instituto de Investigacão e Inovacão em SaúdeUniversidade do Porto, 4200-135 Porto, PortugalCancer BiologyInstitute of Molecular Pathology and
| | - José Manuel Cameselle-Teijeiro
- Instituto de Investigacão e Inovacão em SaúdeUniversidade do Porto, 4200-135 Porto, PortugalCancer BiologyInstitute of Molecular Pathology and Immunology of the University of Porto (IPATIMUP), Rua Dr Roberto Frias, s/n, 4200-465 Porto, PortugalMedical FacultyUniversity of Porto, Al. Prof. Hernâni Monteiro, P-4200 Porto, PortugalEndocrinologyDiabetes and Metabolism Department, Centro Hospitalar e Universitário de Coimbra, Praceta Mota Pinto, 3000-075 Coimbra, PortugalMedical FacultyUniversity of Coimbra, Azinhaga de Santa Comba, 3000-548 Coimbra, PortugalDepartment of PathologyMedical Faculty, Servicio Gallego de Salud-SERGAS, Clinical University Hospital, University of Santiago de Compostela, 15705 Santiago de Compostela, SpainDepartment of Pathology and OncologyMedical Faculty of Porto University, Porto, PortugalDepartment of PathologyHospital de S. João, Al. Prof. Hernâni Monteiro, P-4200 Porto, Portugal
| | - Paula Soares
- Instituto de Investigacão e Inovacão em SaúdeUniversidade do Porto, 4200-135 Porto, PortugalCancer BiologyInstitute of Molecular Pathology and Immunology of the University of Porto (IPATIMUP), Rua Dr Roberto Frias, s/n, 4200-465 Porto, PortugalMedical FacultyUniversity of Porto, Al. Prof. Hernâni Monteiro, P-4200 Porto, PortugalEndocrinologyDiabetes and Metabolism Department, Centro Hospitalar e Universitário de Coimbra, Praceta Mota Pinto, 3000-075 Coimbra, PortugalMedical FacultyUniversity of Coimbra, Azinhaga de Santa Comba, 3000-548 Coimbra, PortugalDepartment of PathologyMedical Faculty, Servicio Gallego de Salud-SERGAS, Clinical University Hospital, University of Santiago de Compostela, 15705 Santiago de Compostela, SpainDepartment of Pathology and OncologyMedical Faculty of Porto University, Porto, PortugalDepartment of PathologyHospital de S. João, Al. Prof. Hernâni Monteiro, P-4200 Porto, Portugal Instituto de Investigacão e Inovacão em SaúdeUniversidade do Porto, 4200-135 Porto, PortugalCancer BiologyInstitute of Molecular Pathology and Immunology of the University of Porto (IPATIMUP), Rua Dr Roberto Frias, s/n, 4200-465 Porto, PortugalMedical FacultyUniversity of Porto, Al. Prof. Hernâni Monteiro, P-4200 Porto, PortugalEndocrinologyDiabetes and Metabolism Department, Centro Hospitalar e Universitário de Coimbra, Praceta Mota Pinto, 3000-075 Coimbra, PortugalMedical FacultyUniversity of Coimbra, Azinhaga de Santa Comba, 3000-548 Coimbra, PortugalDepartment of PathologyMedical Faculty, Servicio Gallego de Salud-SERGAS, Clinical University Hospital, University of Santiago de Compostela, 15705 Santiago de Compostela, SpainDepartment of Pathology and OncologyMedical Faculty of Porto University, Porto, PortugalDepartment of PathologyHospital de S. João, Al. Prof. Hernâni Monteiro, P-4200 Porto, Portugal Instituto de Investigacão e Inovacão em SaúdeUniversidade do Porto, 4200-135 Porto, PortugalCancer BiologyInstitute of Molecular Pathology and
| | - Manuel Sobrinho-Simões
- Instituto de Investigacão e Inovacão em SaúdeUniversidade do Porto, 4200-135 Porto, PortugalCancer BiologyInstitute of Molecular Pathology and Immunology of the University of Porto (IPATIMUP), Rua Dr Roberto Frias, s/n, 4200-465 Porto, PortugalMedical FacultyUniversity of Porto, Al. Prof. Hernâni Monteiro, P-4200 Porto, PortugalEndocrinologyDiabetes and Metabolism Department, Centro Hospitalar e Universitário de Coimbra, Praceta Mota Pinto, 3000-075 Coimbra, PortugalMedical FacultyUniversity of Coimbra, Azinhaga de Santa Comba, 3000-548 Coimbra, PortugalDepartment of PathologyMedical Faculty, Servicio Gallego de Salud-SERGAS, Clinical University Hospital, University of Santiago de Compostela, 15705 Santiago de Compostela, SpainDepartment of Pathology and OncologyMedical Faculty of Porto University, Porto, PortugalDepartment of PathologyHospital de S. João, Al. Prof. Hernâni Monteiro, P-4200 Porto, Portugal Instituto de Investigacão e Inovacão em SaúdeUniversidade do Porto, 4200-135 Porto, PortugalCancer BiologyInstitute of Molecular Pathology and Immunology of the University of Porto (IPATIMUP), Rua Dr Roberto Frias, s/n, 4200-465 Porto, PortugalMedical FacultyUniversity of Porto, Al. Prof. Hernâni Monteiro, P-4200 Porto, PortugalEndocrinologyDiabetes and Metabolism Department, Centro Hospitalar e Universitário de Coimbra, Praceta Mota Pinto, 3000-075 Coimbra, PortugalMedical FacultyUniversity of Coimbra, Azinhaga de Santa Comba, 3000-548 Coimbra, PortugalDepartment of PathologyMedical Faculty, Servicio Gallego de Salud-SERGAS, Clinical University Hospital, University of Santiago de Compostela, 15705 Santiago de Compostela, SpainDepartment of Pathology and OncologyMedical Faculty of Porto University, Porto, PortugalDepartment of PathologyHospital de S. João, Al. Prof. Hernâni Monteiro, P-4200 Porto, Portugal Instituto de Investigacão e Inovacão em SaúdeUniversidade do Porto, 4200-135 Porto, PortugalCancer BiologyInstitute of Molecular Pathology and
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Yabuta S, Masaki M, Shidoji Y. Associations of Buccal Cell Telomere Length with Daily Intake of β-Carotene or α-Tocopherol Are Dependent on Carotenoid Metabolism-related Gene Polymorphisms in Healthy Japanese Adults. J Nutr Health Aging 2016; 20:267-74. [PMID: 26892575 DOI: 10.1007/s12603-015-0577-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
OBJECTIVE Telomere length shortening is modulated not only by aging, but also by both genetic and environmental factors. The aim of this study was to investigate the interactions between antioxidant nutrient metabolism-related gene single nucleotide polymorphisms (the genetic factors) and nutrient intake (the environmental factors) in their effects on telomere length shortening. SETTING AND PARTICIPANTS Data were collected on the relative telomere lengths (RTLs) of buccal cells and the habitual food intake of 70 healthy Japanese adults. MEASUREMENTS All subjects were genotyped for two common single nucleotide polymorphisms: rs6564851 in the β-carotene-15,15'-mono-oxygenase 1 (BCMO1) gene and rs362090 in the intestine-specific homeobox (ISX) gene. RESULTS Univariate analysis revealed that buccal RTL was not significantly modulated by either age or gender. Then, we subdivided the study population into four groups based on combinations of the rs6564851 and rs362090 genotypes. After this subdivision, we showed a positive effect of daily α- or β-carotene intake on buccal RTL in the ISX rs362090 G-allele carrier + BCMO1 rs6564851 GG-genotype group (p = 0.026). Additionally, daily intake of another antioxidative fat-soluble vitamin, α-tocopherol, was positively associated with buccal RTL in the ISX rs362090 AA-homozygote + BCMO1 rs6564851 T-allele carrier group (p = 0.037). CONCLUSION Our study clearly indicates that high dietary intake of the antioxidants α, β-carotene and α-tocopherol protects buccal cells from RTL shortening, depending on the genetic background of antioxidant vitamin-related genes.
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Affiliation(s)
- S Yabuta
- Yoshihiro Shidoji, Molecular and Cellular Biology, Graduate School of Human Health Science, University of Nagasaki, 1-1-1 Academy Hills, Nagayo, Nagasaki 851-2195, Japan. E-mail:
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Myung JK, Kwak BK, Lim JA, Lee MC, Kim MJ. TERT Promoter Mutations and Tumor Persistence/Recurrence in Papillary Thyroid Cancer. Cancer Res Treat 2015; 48:942-7. [PMID: 26727717 PMCID: PMC4946362 DOI: 10.4143/crt.2015.362] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Accepted: 12/17/2015] [Indexed: 01/20/2023] Open
Abstract
PURPOSE A telomerase reverse transcriptase (TERT) promoter mutation was identified in thyroid cancer. This TERT promoter mutation is thought to be a prognostic molecular marker, because its association with tumor aggressiveness, persistence/recurrence, and disease-specific mortality in papillary thyroid carcinoma (PTC) has been reported. In this study, we attempted to determine whether the impact of the TERT promoter mutation on PTC persistence/recurrence is independent of clinicopathological parameters. MATERIALS AND METHODS Using propensity score matching, 39 patients with PTC persistence or recurrence were matched with 35 patients without persistence or recurrence, with a similar age, sex, tumor size, multifocality, bilaterality, extrathyroidal extension, and lymph node metastasis. The TERT promoter and the BRAF V600E mutations were identified from PTC samples. RESULTS The TERT promoter mutation was detected in 18% of PTC patients (13/74). No significant difference in the frequency of the TERT promoter mutation was observed between the persistence/recurrence group and the non-recurrence group. CONCLUSION These results suggest that the prognostic implications of the TERT promoter mutation are dependent on clinicopathological parameters.
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Affiliation(s)
- Jae Kyung Myung
- Department of Pathology, Korea Cancer Center Hospital, Seoul, Korea
| | - Byung Kuk Kwak
- Department of Internal Medicine, Korea Cancer Center Hospital, Seoul, Korea
| | - Jung Ah Lim
- Department of Internal Medicine, National Medical Center, Seoul, Korea
| | - Myung-Chul Lee
- Department of Otorhinolaryngology, Korea Cancer Center Hospital, Seoul, Korea
| | - Min Joo Kim
- Department of Internal Medicine, Korea Cancer Center Hospital, Seoul, Korea
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Larrivée-Vanier S, Magne F, Patey N, Chanoine JP, Vuissoz JM, Van Vliet G, Deladoëy J. Conserved Telomere Length in Human Ectopic Thyroids: An Argument Against Premature Differentiation Causing Arrested Migration. Thyroid 2015; 25:1050-4. [PMID: 26131731 PMCID: PMC4746059 DOI: 10.1089/thy.2015.0204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
BACKGROUND In humans, the cause of arrested migration of the median thyroid anlage resulting in an ectopic sublingual gland is unknown. These ectopic glands have a normal follicular architecture but their thyrotropin-induced growth is insufficient, leading to congenital hypothyroidism in the vast majority of affected subjects. We hypothesized that arrested migration is due to premature differentiation [reflected by decreased telomere length (TL)], as observed in neural tube defects in mice. METHODS Absolute TL and telomerase reverse transcriptase (hTERT) expression was measured in four ectopic and six orthotopic thyroids. TL was measured by quantitative polymerase chain reaction of genomic DNA, whereas hTERT expression was measured by quantitative polymerase chain reaction of total RNA. RESULTS The mean±standard deviation TL (in kilobases per diploid genome) was 140.45±40.07 in ectopic and 97.50±30.48 in orthotopic thyroids (p=0.12). Expression of hTERT was quiescent in both ectopic and orthotopic thyroids. CONCLUSIONS Compared with orthotopic thyroids, TL shortening is not observed in ectopic thyroid tissues and, consequently, no compensatory hTERT expression was measured. This makes premature differentiation an unlikely cause of arrested migration and it suggests, indirectly, that ectopic thyroids are not at higher risk of cancer than orthotopic thyroids.
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Affiliation(s)
- Stéphanie Larrivée-Vanier
- Endocrinology Service and Research Center, Centre Hospitalier Universitaire Sainte-Justine, University of Montreal, Montreal, Canada
- Department of Pediatrics, Centre Hospitalier Universitaire Sainte-Justine, University of Montreal, Montreal, Canada
| | - Fabien Magne
- Endocrinology Service and Research Center, Centre Hospitalier Universitaire Sainte-Justine, University of Montreal, Montreal, Canada
- Department of Pediatrics, Centre Hospitalier Universitaire Sainte-Justine, University of Montreal, Montreal, Canada
| | - Natalie Patey
- Department of Pathology, Centre Hospitalier Universitaire Sainte-Justine, University of Montreal, Montreal, Canada
| | - Jean-Pierre Chanoine
- Endocrinology and Diabetes Unit, Department of Pediatrics, British Columbia Children’s Hospital, University of British Columbia, Vancouver, Canada
| | - Jean-Marc Vuissoz
- Division of Pediatric Endocrinology, University Children’s Hospital Basel (UKBB), University of Basel, Basel, Switzerland
| | - Guy Van Vliet
- Endocrinology Service and Research Center, Centre Hospitalier Universitaire Sainte-Justine, University of Montreal, Montreal, Canada
- Department of Pediatrics, Centre Hospitalier Universitaire Sainte-Justine, University of Montreal, Montreal, Canada
| | - Johnny Deladoëy
- Endocrinology Service and Research Center, Centre Hospitalier Universitaire Sainte-Justine, University of Montreal, Montreal, Canada
- Department of Pediatrics, Centre Hospitalier Universitaire Sainte-Justine, University of Montreal, Montreal, Canada
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Tavarelli M, Russo M, Terranova R, Scollo C, Spadaro A, Sapuppo G, Malandrino P, Masucci R, Squatrito S, Pellegriti G. Familial Non-Medullary Thyroid Cancer Represents an Independent Risk Factor for Increased Cancer Aggressiveness: A Retrospective Analysis of 74 Families. Front Endocrinol (Lausanne) 2015; 6:117. [PMID: 26284028 PMCID: PMC4522563 DOI: 10.3389/fendo.2015.00117] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Accepted: 07/17/2015] [Indexed: 12/24/2022] Open
Abstract
OBJECTIVES To assess whether familial non-medullary thyroid cancer (FNMTC) represents an independent risk factor for increased aggressiveness of the tumor, as concern as the clinical presentation and the long-term follow-up in respect of sporadic differentiated thyroid cancer (SDTC). DESIGN Retrospective study; 1976-2014. PATIENTS AND METHODS Seventy-four FNMTC families (151 affected individuals): family relationship and number of affected family members were evaluated. Clinical and histopathological features and outcome were compared to that of 643 SDTC patients followed in the same period according to the same institutional protocols. Median follow-up was 57.7 months (range 12-136) in FNMTC and 59.7 (range 15-94.6) in SDTC patients. RESULTS Three cases occurred in 3 families and 2 cases in the other 71. F:M was 3.7:1 in FNMTC and 4.3:1 in SDTC (NS). The family relationship was siblings in 62.2%. Mean age at diagnosis was lower in FNMTC than in SDTC (p < 0.005). Papillary/follicular histotype distribution was similar (86%). Papillary tumors were more frequently multifocal in FNMTC (p = 0.004) and with lymph-node metastases (p = 0.016). Disease-free survival (DFS) was shorter in FNMTC vs. SDTC (p < 0.0001) with 74.8 vs. 90.8% patients free of disease at the last control (p < 0.005). Three patients died in FNMTC group vs. 1 in SDTC (p = 0.02). CONCLUSION Familial non-medullary thyroid cancer displays distinct characteristics as earlier age of onset and increased aggressiveness at diagnosis and a higher rate of persistent/recurrent disease and mortality with a shorter DFS in respect with SDTC. FNMTC patients, therefore, should be followed accurately. As the specific gene (or genes) responsible for susceptibility for FNMTC has not yet been identified, a low frequency periodic screening of relatives DTC patients may be useful to identify FNMTC patients at early stage of disease.
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Affiliation(s)
- Martina Tavarelli
- Endocrinology, Department of Clinical and Experimental Medicine, Garibaldi Nesima Medical Center, University of Catania, Catania, Italy
| | - Marco Russo
- Endocrinology, Department of Clinical and Experimental Medicine, Garibaldi Nesima Medical Center, University of Catania, Catania, Italy
| | - Rosy Terranova
- Endocrinology, Department of Clinical and Experimental Medicine, Garibaldi Nesima Medical Center, University of Catania, Catania, Italy
| | - Claudia Scollo
- Endocrinology, Garibaldi Nesima Hospital, Catania, Italy
| | - Angela Spadaro
- Endocrinology, Department of Clinical and Experimental Medicine, Garibaldi Nesima Medical Center, University of Catania, Catania, Italy
| | - Giulia Sapuppo
- Endocrinology, Department of Clinical and Experimental Medicine, Garibaldi Nesima Medical Center, University of Catania, Catania, Italy
| | | | - Romilda Masucci
- Surgical Oncology, Garibaldi Nesima Hospital, Catania, Italy
| | - Sebastiano Squatrito
- Endocrinology, Department of Clinical and Experimental Medicine, Garibaldi Nesima Medical Center, University of Catania, Catania, Italy
| | - Gabriella Pellegriti
- Endocrinology, Garibaldi Nesima Hospital, Catania, Italy
- *Correspondence: Gabriella Pellegriti, Endocrinology, Garibaldi Nesima Hospital, Via Palermo 636, Catania 95122, Italy,
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Vinagre J, Pinto V, Celestino R, Reis M, Pópulo H, Boaventura P, Melo M, Catarino T, Lima J, Lopes JM, Máximo V, Sobrinho-Simões M, Soares P. Telomerase promoter mutations in cancer: an emerging molecular biomarker? Virchows Arch 2014; 465:119-33. [DOI: 10.1007/s00428-014-1608-4] [Citation(s) in RCA: 84] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Revised: 05/19/2014] [Accepted: 06/16/2014] [Indexed: 12/16/2022]
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Melo M, da Rocha AG, Vinagre J, Batista R, Peixoto J, Tavares C, Celestino R, Almeida A, Salgado C, Eloy C, Castro P, Prazeres H, Lima J, Amaro T, Lobo C, Martins MJ, Moura M, Cavaco B, Leite V, Cameselle-Teijeiro JM, Carrilho F, Carvalheiro M, Máximo V, Sobrinho-Simões M, Soares P. TERT promoter mutations are a major indicator of poor outcome in differentiated thyroid carcinomas. J Clin Endocrinol Metab 2014; 99:E754-65. [PMID: 24476079 PMCID: PMC4191548 DOI: 10.1210/jc.2013-3734] [Citation(s) in RCA: 372] [Impact Index Per Article: 37.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
CONTEXT Telomerase promoter mutations (TERT) were recently described in follicular cell-derived thyroid carcinomas (FCDTC) and seem to be more prevalent in aggressive cancers. OBJECTIVES We aimed to evaluate the frequency of TERT promoter mutations in thyroid lesions and to investigate the prognostic significance of such mutations in a large cohort of patients with differentiated thyroid carcinomas (DTCs). DESIGN This was a retrospective observational study. SETTING AND PATIENTS We studied 647 tumors and tumor-like lesions. A total of 469 patients with FCDTC treated and followed in five university hospitals were included. Mean follow-up (±SD) was 7.8 ± 5.8 years. MAIN OUTCOME MEASURES Predictive value of TERT promoter mutations for distant metastasization, disease persistence at the end of follow-up, and disease-specific mortality. RESULTS TERT promoter mutations were found in 7.5% of papillary carcinomas (PTCs), 17.1% of follicular carcinomas, 29.0% of poorly differentiated carcinomas, and 33.3% of anaplastic thyroid carcinomas. Patients with TERT-mutated tumors were older (P < .001) and had larger tumors (P = .002). In DTCs, TERT promoter mutations were significantly associated with distant metastases (P < .001) and higher stage (P < .001). Patients with DTC harboring TERT promoter mutations were submitted to more radioiodine treatments (P = .009) with higher cumulative dose (P = .004) and to more treatment modalities (P = .001). At the end of follow-up, patients with TERT-mutated DTCs were more prone to have persistent disease (P = .001). TERT promoter mutations were significantly associated with disease-specific mortality [in the whole FCDTC (P < .001)] in DTCs (P < .001), PTCs (P = .001), and follicular carcinomas (P < .001). After adjusting for age at diagnosis and gender, the hazard ratio was 10.35 (95% confidence interval 2.01-53.24; P = .005) in DTC and 23.81 (95% confidence interval 1.36-415.76; P = .03) in PTCs. CONCLUSIONS TERT promoter mutations are an indicator of clinically aggressive tumors, being correlated with worse outcome and disease-specific mortality in DTC. TERT promoter mutations have an independent prognostic value in DTC and, notably, in PTC.
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Affiliation(s)
- Miguel Melo
- Institute of Molecular Pathology and Immunology of the University of Porto (M.Me., A.G.d.R., J.V., R.B., J.P., C.T., R.C., A.A., C.S., C.E., P.C., H.P., J.L., V.M., M.S.-S., P.S.), 4200-465 Porto, Portugal; Medical Faculty, University of Porto (A.G.d.R., C.T.), 4200-139 Porto, Portugal; Institute of Biomedical Sciences of Abel Salazar, University of Porto (J.V., A.A.), 4050-313 Porto, Portugal; Department of Pathology and Oncology, Medical Faculty, University of Porto (J.L., V.M., M.S.-S., P.S.), 4200-139 Porto, Portugal; Departments of Endocrinology, Diabetes, and Metabolism (M.Me., F.C., M.C.) and Pathology (M.J.M.), University and Hospital Center of Coimbra, 3000-075 Coimbra, Portugal; Unit of Endocrinology (M.Me., M.C.), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; School of Allied Health Sciences, ESTSP - Escola Superior de Tecnologia da Saúde do Porto (R.C.), Polytechnic of Porto, 4400-330 Vila Nova de Gaia, Portugal; Portuguese Institute of Oncology (H.P.), Coimbra Center, 3000-075 Coimbra, Portugal; Department of Pathology (T.A.), Hospital Pedro Hispano, 4464-513 Matosinhos, Portugal; Department of Pathology (C.L.), Portuguese Institute of Oncology, Porto Center, 4200-072 Porto, Portugal; Center for Investigation of Molecular Pathobiology (M.Mo., B.C., V.L.) and Department of Endocrinology (V.L.), Portuguese Institute of Oncology, Lisbon Center, 1099-023 Lisbon, Portugal; Center for the Study of Chronic Diseases (M.Mo., B.C., V.L.), Faculty of Medical Sciences, University of Lisbon, 1099-085 Lisbon, Portugal; Department of Pathology (J.M.C.-T.), Clinical University Hospital, Servicio Gallego de Salud - SERGAS, Medical Faculty, University of Santiago de Compostela, 15705 Santiago de Compostela, Spain; and Department of Pathology (M.S.-S.), Hospital S. João, 4200-319 Porto, Portugal
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Wark L, Danescu A, Natarajan S, Zhu X, Cheng SY, Hombach-Klonisch S, Mai S, Klonisch T. Three-dimensional telomere dynamics in follicular thyroid cancer. Thyroid 2014; 24:296-304. [PMID: 23819464 PMCID: PMC3926167 DOI: 10.1089/thy.2013.0118] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Over the last decade, annual incidence rates for thyroid cancer have been among the highest of all cancers in the Western world. However, the genomic mechanisms impacting thyroid carcinogenesis remain elusive. METHODS We employed an established mouse model of follicular thyroid cancer (FTC) with a homozygous proline to valine mutation (Thrb(PV/PV)) in the thyroid receptor β1 (TRβ1) and applied quantitative three-dimensional (3D) telomere analysis to determine 3D telomeric profiles in Thrb(PV)(/PV), Thrb(PV/)(+), and Thrb(+/+) mouse thyrocytes before and after histological presentation of FTC. RESULTS Using quantitative fluorescent in situ hybridization (Q-FISH) and TeloView™ image analysis, we found altered telomeric signatures specifically in mutant mouse thyrocytes. As early as 1 month of age, Thrb(PV/PV) mouse thyrocytes showed more telomeres than normal and heterozygous age-matched counterparts. Importantly, at the very early age of 1 month, 3D telomeric profiles of Thrb(PV/PV) thyrocyte nuclei reveal genetic heterogeneity with several nuclei populations exhibiting different telomere numbers, suggestive of various degrees of aneuploidy within the same animal. This was detected exclusively in Thrb(PV/PV) mice well before the presentation of histological signs of thyroid carcinoma. CONCLUSIONS We identified quantitative 3D telomere analysis as a novel tool for early detection and monitoring of thyrocyte chromosomal (in)stability. This technique has the potential to identify human patients at risk for developing thyroid carcinoma.
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Affiliation(s)
- Landon Wark
- Department of Human Anatomy & Cell Science, Faculty of Medicine, University of Manitoba, Winnipeg, Canada
- Genomic Center for Cancer Research and Diagnosis, Manitoba Institute of Cell Biology, Winnipeg, Canada
| | - Adrian Danescu
- Department of Human Anatomy & Cell Science, Faculty of Medicine, University of Manitoba, Winnipeg, Canada
| | - Suchitra Natarajan
- Department of Human Anatomy & Cell Science, Faculty of Medicine, University of Manitoba, Winnipeg, Canada
| | - Xuguang Zhu
- Laboratory of Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
| | - Sheue-yann Cheng
- Laboratory of Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
| | - Sabine Hombach-Klonisch
- Department of Human Anatomy & Cell Science, Faculty of Medicine, University of Manitoba, Winnipeg, Canada
- Department of Obstetrics, Gynecology, & Reproductive Medicine, Faculty of Medicine, University of Manitoba, Winnipeg, Canada
| | - Sabine Mai
- Department of Human Anatomy & Cell Science, Faculty of Medicine, University of Manitoba, Winnipeg, Canada
- Genomic Center for Cancer Research and Diagnosis, Manitoba Institute of Cell Biology, Winnipeg, Canada
- Department of Physiology, Faculty of Medicine, University of Manitoba, Winnipeg, Canada
| | - Thomas Klonisch
- Department of Human Anatomy & Cell Science, Faculty of Medicine, University of Manitoba, Winnipeg, Canada
- Department of Medical Microbiology & Infectious Diseases, Faculty of Medicine, University of Manitoba, Winnipeg, Canada
- Department of Surgery, Faculty of Medicine, University of Manitoba, Winnipeg, Canada
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Pinto AE, Silva GL, Henrique R, Menezes FD, Teixeira MR, Leite V, Cavaco BM. Familial vs sporadic papillary thyroid carcinoma: a matched-case comparative study showing similar clinical/prognostic behaviour. Eur J Endocrinol 2014; 170:321-7. [PMID: 24272198 DOI: 10.1530/eje-13-0865] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
OBJECTIVE Familial non-medullary thyroid cancer has been proposed as an aggressive clinical entity. Our aim in this study is to investigate potential distinguishing features as well as the biological and clinical aggressiveness of familial vs sporadic papillary thyroid carcinoma (PTC). We assessed clinicopathological characteristics, outcome measures and DNA ploidy. DESIGN A matched-case comparative study. METHODS A series of patients with familial PTC (n=107) and two subgroups, one with three or more affected elements (n=32) and another including index cases only (n=61), were compared with patients with sporadic PTC (n=107), matched by age, gender, pTNM disease extension and approximate follow-up duration. Histological variant, extrathyroidal extension, vascular invasion, tumour multifocality and bilateral growth were evaluated. Ploidy pattern was analysed in available samples by DNA flow cytometry. The probabilities of disease-free survival (DFS) and overall survival (OS) were estimated according to the Kaplan-Meier (K-M) method. RESULTS No patient with familial PTC died of disease during follow-up (median, 72 months), contrarily to five patients (4.7%) (P=0.06) with sporadic PTC (median, 90 months). There was a significantly higher tumour multifocality in familial PTC (index cases subgroup) vs sporadic PTC (P=0.035), and a trend, in the familial PTC cohort with three or more affected elements, to show extrathyroidal extension (P=0.054) more frequently. No difference was observed in DNA ploidy status. The K-M analyses showed no significant differences between both entities in relation to DFS or OS. CONCLUSION Apart from multifocality, familial PTC appears to have similar clinical/prognostic behaviour when compared with sporadic forms of the disease.
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21
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Frequency of TERT promoter mutations in human cancers. Nat Commun 2014; 4:2185. [PMID: 23887589 DOI: 10.1038/ncomms3185] [Citation(s) in RCA: 638] [Impact Index Per Article: 63.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Accepted: 06/25/2013] [Indexed: 12/15/2022] Open
Abstract
Reactivation of telomerase has been implicated in human tumorigenesis, but the underlying mechanisms remain poorly understood. Here we report the presence of recurrent somatic mutations in the TERT promoter in cancers of the central nervous system (43%), bladder (59%), thyroid (follicular cell-derived, 10%) and skin (melanoma, 29%). In thyroid cancers, the presence of TERT promoter mutations (when occurring together with BRAF mutations) is significantly associated with higher TERT mRNA expression, and in glioblastoma we find a trend for increased telomerase expression in cases harbouring TERT promoter mutations. Both in thyroid cancers and glioblastoma, TERT promoter mutations are significantly associated with older age of the patients. Our results show that TERT promoter mutations are relatively frequent in specific types of human cancers, where they lead to enhanced expression of telomerase.
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Gramatges MM, Liu Q, Yasui Y, Okcu MF, Neglia JP, Strong LC, Armstrong GT, Robison LL, Bhatia S. Telomere content and risk of second malignant neoplasm in survivors of childhood cancer: a report from the Childhood Cancer Survivor Study. Clin Cancer Res 2013; 20:904-11. [PMID: 24277454 DOI: 10.1158/1078-0432.ccr-13-2076] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE Shorter constitutional telomere length has been associated with increased cancer incidence. Furthermore, telomere shortening is observed in response to intensive chemotherapy and/or ionizing radiation exposure. We aimed to determine whether less telomere content was associated with treatment-related second malignant neoplasms (SMN) in childhood cancer survivors. EXPERIMENTAL DESIGN Using a nested case-control design, 147 cancer survivors with breast cancer, thyroid cancer, or sarcoma developing after treatment for childhood cancer (cases) were matched (1:1) with childhood cancer survivors without a SMN (controls). Cases and controls were matched by primary cancer diagnosis, years since diagnosis, age at the time of sample collection, years of follow-up from childhood cancer diagnosis, exposure to specific chemotherapy agents, and to specific radiation fields. We performed conditional logistic regression using telomere content as a continuous variable to estimate ORs with corresponding 95% confidence intervals (CI) for development of SMN. ORs were also estimated for specific SMN types, i.e., breast cancer, thyroid cancer, and sarcoma. RESULTS There was an inverse relationship between telomere content and SMN, with an adjusted OR of 0.3 per unit change in telomere length to single-copy gene ratio (95% CI, 0.09-1.02; P = 0.05). Patients with thyroid cancer SMN were less likely to have more telomere content (OR, 0.04; 95% CI, 0.00-0.55; P = 0.01), but statistically significant associations could not be demonstrated for breast cancer or sarcoma. CONCLUSIONS A relation between less telomere content and treatment-related thyroid cancer was observed, suggesting that shorter telomeres may contribute to certain SMNs in childhood cancer survivors.
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Affiliation(s)
- Maria M Gramatges
- Authors' Affiliations: Texas Children's Cancer Center, Baylor College of Medicine; The University of Texas MD Anderson Cancer Center, Houston, Texas; School of Public Health, University of Alberta, Edmonton, Canada; Masonic Cancer Center, University of Minnesota, Minneapolis, Minnesota; St. Jude Children's Research Hospital, Memphis, Tennessee; and City of Hope, Duarte, California
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He M, Bian B, Gesuwan K, Gulati N, Zhang L, Nilubol N, Kebebew E. Telomere length is shorter in affected members of families with familial nonmedullary thyroid cancer. Thyroid 2013; 23:301-7. [PMID: 23009101 PMCID: PMC3593684 DOI: 10.1089/thy.2012.0270] [Citation(s) in RCA: 19] [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: 12/28/2022]
Abstract
BACKGROUND The theory that short telomere length and genetic defects in maintaining telomere length are associated with familial nonmedullary thyroid cancer (FNMTC) is controversial. Thus, the aim of this study was to determine whether telomere length and genes involved in maintaining telomere length are altered in FNMTC. METHODS Blood samples were collected from 44 members (13 affected and 31 unaffected) of six families with FNMTC and from 60 controls. Quantitative polymerase chain reaction (Q-PCR) and reverse transcription PCR were performed to analyze relative telomere length (RTL), gene copy number, and mRNA expression of telomerase reverse transcriptase (hTERT), telomere repeat binding factor 1 (TRF1), telomere repeat binding factor 2 (TRF2), repressor activator protein 1 (RAP1), TRF1 interacting nuclear factor 2 (TIN2), tripeptidyl peptidase 1 (TPP1), and protection of telomere 1 (POT1). RESULTS Affected members had shorter RTL, as compared with unaffected members (0.98 vs. 1.23, p<0.01). There was no significant difference in hTERT, TRF1, TRF2, RAP1, TIN2, TPP1, and POT1 gene copy number or mRNA expression between affected and unaffected members. CONCLUSIONS RTL is shorter in affected members with FNMTC but is not associated with altered copy number or expression in hTERT, TRF1, TRF2, RAP1, TIN2, TPP1, and POT1. The small differences in RTL preclude the utility of RTL as a marker for FNMTC in at-risk individuals.
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Affiliation(s)
- Mei He
- Endocrine Oncology Branch, National Cancer Institute, Bethesda, Maryland 20892, USA
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Pacini F, Ito Y, Luster M, Pitoia F, Robinson B, Wirth L. Radioactive iodine-refractory differentiated thyroid cancer: unmet needs and future directions. Expert Rev Endocrinol Metab 2012; 7:541-554. [PMID: 30780891 DOI: 10.1586/eem.12.36] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Approximately 90% of thyroid cancers are differentiated (DTCs) and have papillary, follicular or Hürthle cell morphology. Although treatment with surgery and radioactive iodine (I-131; RAI), as appropriate, is associated with significant cure rates and survival benefits, clonal disease progression with development of refractoriness to RAI poses a major therapeutic challenge in about 15% of patients. Traditional chemotherapeutic agents are relatively ineffective and are associated with significant toxicities. Molecular studies have demonstrated that the development and progression of DTC are associated with a series of consistent abnormalities in pathways such as MAPK/ERK and PI3/Akt, which govern cellular growth, proliferation, apoptosis and angiogenesis. Small molecular inhibitors that target these pathogenic pathways, without many of the impairments associated with cytotoxic chemotherapy, have demonstrated efficacy in a variety of malignancies, including renal cell carcinoma, hepatocellular carcinoma, non-small-cell lung cancer and chronic myelogenous leukemia. Several targeted therapeutic agents are in development for the treatment of RAI-refractory DTC. Sorafenib and lenvatinib are being studied in placebo-controlled Phase III trials based on encouraging efficacy results observed in single-arm Phase II studies.
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Affiliation(s)
| | | | | | - Fabian Pitoia
- d University of Buenos Aires, Buenos Aires, Argentina
| | | | - Lori Wirth
- f Massachusetts General Hospital, Boston, MA, USA
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Xu L, Li S, Stohr BA. The role of telomere biology in cancer. ANNUAL REVIEW OF PATHOLOGY-MECHANISMS OF DISEASE 2012; 8:49-78. [PMID: 22934675 DOI: 10.1146/annurev-pathol-020712-164030] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Telomere biology plays a critical and complex role in the initiation and progression of cancer. Although telomere dysfunction resulting from replicative attrition constrains tumor growth by engaging DNA-damage signaling pathways, it can also promote tumorigenesis by causing oncogenic chromosomal rearrangements. Expression of the telomerase enzyme enables telomere-length homeostasis and allows tumor cells to escape the antiproliferative barrier posed by short telomeres. Telomeres and telomerase also function independently of one another. Recent work has suggested that telomerase promotes cell growth through pathways unrelated to telomere maintenance, and a subset of tumors elongate telomeres through telomerase-independent mechanisms. In an effort to exploit the integral link between telomere biology and cancer growth, investigators have developed several telomerase-based therapeutic strategies, which are currently in clinical trials. Here, we broadly review the state of the field with a particular focus on recent developments of interest.
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Affiliation(s)
- Lifeng Xu
- Department of Microbiology, University of California-Davis, CA 95616, USA
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