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Andreotti V, Vanni I, Pastorino L, Ghiorzo P, Bruno W. Germline POT1 Variants: A Critical Perspective on POT1 Tumor Predisposition Syndrome. Genes (Basel) 2024; 15:104. [PMID: 38254993 PMCID: PMC10815363 DOI: 10.3390/genes15010104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 01/10/2024] [Accepted: 01/13/2024] [Indexed: 01/24/2024] Open
Abstract
The Protection of Telomere 1 (POT1) gene was identified as a melanoma predisposition candidate nearly 10 years ago. Thereafter, various cancers have been proposed as associated with germline POT1 variants in the context of the so-called POT1 Predisposition Tumor Syndrome (POT1-TPD). While the key role, and related risks, of the alterations in POT1 in melanoma are established, the correlation between germline POT1 variants and the susceptibility to other cancers partially lacks evidence, due also to the rarity of POT1-TPD. Issues range from the absence of functional or segregation studies to biased datasets or the need for a revised classification of variants. Furthermore, a proposal of a surveillance protocol related to the cancers associated with POT1 pathogenic variants requires reliable data to avoid an excessive, possibly unjustified, burden for POT1 variant carriers. We propose a critical perspective regarding data published over the last 10 years that correlate POT1 variants to various types of cancer, other than cutaneous melanoma, to offer food for thought for the specialists who manage cancer predisposition syndromes and to stimulate a debate on the grey areas that have been exposed.
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Affiliation(s)
- Virginia Andreotti
- Genetics of Rare Cancers, IRCCS Ospedale Policlinico San Martino, Largo Rosanna Benzi 10, 16132 Genoa, Italy; (V.A.); (I.V.); (L.P.); (P.G.)
| | - Irene Vanni
- Genetics of Rare Cancers, IRCCS Ospedale Policlinico San Martino, Largo Rosanna Benzi 10, 16132 Genoa, Italy; (V.A.); (I.V.); (L.P.); (P.G.)
| | - Lorenza Pastorino
- Genetics of Rare Cancers, IRCCS Ospedale Policlinico San Martino, Largo Rosanna Benzi 10, 16132 Genoa, Italy; (V.A.); (I.V.); (L.P.); (P.G.)
- Department of Internal Medicine and Medical Specialties (DiMI), University of Genoa, V.le Benedetto XV 6, 16132 Genoa, Italy
| | - Paola Ghiorzo
- Genetics of Rare Cancers, IRCCS Ospedale Policlinico San Martino, Largo Rosanna Benzi 10, 16132 Genoa, Italy; (V.A.); (I.V.); (L.P.); (P.G.)
- Department of Internal Medicine and Medical Specialties (DiMI), University of Genoa, V.le Benedetto XV 6, 16132 Genoa, Italy
| | - William Bruno
- Genetics of Rare Cancers, IRCCS Ospedale Policlinico San Martino, Largo Rosanna Benzi 10, 16132 Genoa, Italy; (V.A.); (I.V.); (L.P.); (P.G.)
- Department of Internal Medicine and Medical Specialties (DiMI), University of Genoa, V.le Benedetto XV 6, 16132 Genoa, Italy
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2
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Gozzellino L, Nannini M, Urbini M, Pizzi C, Leone O, Corti B, Baldovini C, Angeli F, Foà A, Pacini D, Folesani G, Costa A, Palumbo T, Nigro MC, Pasquinelli G, Astolfi A, Pantaleo MA. Genomic Landscape Comparison of Cardiac versus Extra-Cardiac Angiosarcomas. Biomedicines 2023; 11:3290. [PMID: 38137511 PMCID: PMC10741871 DOI: 10.3390/biomedicines11123290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 11/29/2023] [Accepted: 12/07/2023] [Indexed: 12/24/2023] Open
Abstract
Angiosarcomas (ASs) are rare malignant vascular entities that can affect several regions in our body, including the heart. Cardiac ASs comprise 25-40% of cardiac sarcomas and can cause death within months of diagnosis. Thus, our aim was to identify potential differences and/or similarities between cardiac and extra-cardiac ASs to enhance targeted therapies and, consequently, patients' prognosis. Whole-transcriptome analysis of three cardiac and eleven extra-cardiac non-cutaneous samples was performed to investigate differential gene expression and mutational events between the two groups. The gene signature of cardiac and extra-cardiac non-cutaneous ASs was also compared to that of cutaneous angiosarcomas (n = 9). H/N/K-RAS and TP53 alterations were more recurrent in extra-cardiac ASs, while POTE-gene family overexpression was peculiar to cardiac ASs. Additionally, in vitro functional analyses showed that POTEH upregulation conferred a growth advantage to recipient cells, partly supporting the cardiac AS aggressive phenotype and patients' scarce survival rate. These features should be considered when investigating alternative treatments.
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Affiliation(s)
- Livia Gozzellino
- Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum—University of Bologna, 40138 Bologna, Italy; (L.G.); (M.N.); (F.A.); (M.C.N.); (M.A.P.)
| | - Margherita Nannini
- Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum—University of Bologna, 40138 Bologna, Italy; (L.G.); (M.N.); (F.A.); (M.C.N.); (M.A.P.)
- Division of Oncology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy
| | - Milena Urbini
- Biosciences Laboratory, IRCCS Istituto Romagnolo per lo Studio dei Tumori (IRST) “Dino Amadori”, 47014 Meldola, Italy;
| | - Carmine Pizzi
- Unit of Cardiology, Department of Medical and Surgical Sciences, University of Bologna, 40138 Bologna, Italy; (C.P.); (A.F.)
| | - Ornella Leone
- Division of Pathology, Cardiovascular and Cardiac Transplant Pathology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy; (O.L.); (B.C.); (C.B.)
| | - Barbara Corti
- Division of Pathology, Cardiovascular and Cardiac Transplant Pathology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy; (O.L.); (B.C.); (C.B.)
| | - Chiara Baldovini
- Division of Pathology, Cardiovascular and Cardiac Transplant Pathology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy; (O.L.); (B.C.); (C.B.)
| | - Francesco Angeli
- Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum—University of Bologna, 40138 Bologna, Italy; (L.G.); (M.N.); (F.A.); (M.C.N.); (M.A.P.)
| | - Alberto Foà
- Unit of Cardiology, Department of Medical and Surgical Sciences, University of Bologna, 40138 Bologna, Italy; (C.P.); (A.F.)
| | - Davide Pacini
- Cardiac Surgery Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy; (D.P.); (G.F.)
| | - Gianluca Folesani
- Cardiac Surgery Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy; (D.P.); (G.F.)
| | - Alice Costa
- IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy;
| | - Teresa Palumbo
- Interdepartmental Center Alma Mater Institute on Healthy Planet, Alma Mater Studiorum—University of Bologna, 40138 Bologna, Italy;
| | - Maria Concetta Nigro
- Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum—University of Bologna, 40138 Bologna, Italy; (L.G.); (M.N.); (F.A.); (M.C.N.); (M.A.P.)
| | - Gianandrea Pasquinelli
- Division of Pathology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy;
| | - Annalisa Astolfi
- Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum—University of Bologna, 40138 Bologna, Italy; (L.G.); (M.N.); (F.A.); (M.C.N.); (M.A.P.)
- IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy;
| | - Maria Abbondanza Pantaleo
- Department of Medical and Surgical Sciences (DIMEC), Alma Mater Studiorum—University of Bologna, 40138 Bologna, Italy; (L.G.); (M.N.); (F.A.); (M.C.N.); (M.A.P.)
- Division of Oncology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy
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Yu B, Shen K, Li T, Li J, Meng M, Liu W, Tang Q, Zhu T, Wang X, Leung SWS, Shi Y. Glycolytic enzyme PFKFB3 regulates sphingosine 1-phosphate receptor 1 in proangiogenic glomerular endothelial cells under diabetic condition. Am J Physiol Cell Physiol 2023; 325:C1354-C1368. [PMID: 37781737 PMCID: PMC10861147 DOI: 10.1152/ajpcell.00261.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 09/21/2023] [Accepted: 09/23/2023] [Indexed: 10/03/2023]
Abstract
Glomerular angiogenesis is a characteristic feature of diabetic nephropathy (DN). Enhanced glycolysis plays a crucial role in angiogenesis. The present study was designed to investigate the role of glycolysis in glomerular endothelial cells (GECs) in a mouse model of DN. Mouse renal cortex and isolated glomerular cells were collected for single-cell and RNA sequencing. Cultured GECs were exposed to high glucose in the presence (proangiogenic) and absence of a vascular sprouting regimen. MicroRNA-590-3p was delivered by lipofectamine in vivo and in vitro. In the present study, a subgroup of GECs with proangiogenic features was identified in diabetic kidneys by using sequencing analyses. In cultured proangiogenic GECs, high glucose increased glycolysis and phosphofructokinase/fructose bisphosphatase 3 (PFKFB3) protein expression, which were inhibited by overexpressing miRNA-590-3p. Mimics of miRNA-590-3p also increased receptor for sphingosine 1-phosphate (S1pR1) expression, an angiogenesis regulator, in proangiogenic GECs challenged with high glucose. Inhibition of PFKFB3 by pharmacological and genetic approaches upregulated S1pR1 protein in vitro. Mimics of miRNA-590-3p significantly reduced migration and angiogenic potential in proangiogenic GECs challenged with high glucose. Ten-week-old type 2 diabetic mice had elevated urinary albumin levels, reduced renal cortex miRNA-590-3p expression, and disarrangement of glomerular endothelial cell fenestration. Overexpressing miRNA-590-3p via perirenal adipose tissue injection restored endothelial cell fenestration and reduced urinary albumin levels in diabetic mice. Therefore, the present study identifies a subgroup of GECs with proangiogenic features in mice with DN. Local administration of miRNA-590-3p mimics reduces glycolytic rate and upregulates S1pR1 protein expression in proangiogenic GECs. The protective effects of miRNA-590-3p provide therapeutic potential in DN treatment.NEW & NOTEWORTHY Proangiogenetic glomerular endothelial cells (GECs) are activated in diabetic nephropathy. High glucose upregulates glycolytic enzyme phosphofructokinase/fructose bisphosphatase 3 (PFKFB3) in proangiogenetic cells. PFKFB3 protects the glomerular filtration barrier by targeting endothelial S1pR1. MiRNA-590-3p restores endothelial cell function and mitigates diabetic nephropathy.
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Affiliation(s)
- Baixue Yu
- Institute of Clinical Science, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
- Key Laboratory of Organ Transplantation, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Kaiyuan Shen
- Department of Neurology, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Tingting Li
- Institute of Clinical Science, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
- Key Laboratory of Organ Transplantation, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Jiawei Li
- Key Laboratory of Organ Transplantation, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
- Department of Urology, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Mei Meng
- Institute of Clinical Science, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
- Key Laboratory of Organ Transplantation, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Wenjie Liu
- Institute of Clinical Science, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
- Key Laboratory of Organ Transplantation, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Qunye Tang
- Key Laboratory of Organ Transplantation, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
- Department of Urology, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Tongyu Zhu
- Key Laboratory of Organ Transplantation, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
- Department of Urology, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Xin Wang
- Department of Neurology, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Susan W S Leung
- Department of Pharmacology and Pharmacy, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, People's Republic of China
| | - Yi Shi
- Institute of Clinical Science, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
- Key Laboratory of Organ Transplantation, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
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Martínez P, Sánchez-Vázquez R, Ferrara-Romeo I, Serrano R, Flores JM, Blasco MA. A mouse model for Li-Fraumeni-Like Syndrome with cardiac angiosarcomas associated to POT1 mutations. PLoS Genet 2022; 18:e1010260. [PMID: 35727838 PMCID: PMC9212151 DOI: 10.1371/journal.pgen.1010260] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 05/16/2022] [Indexed: 11/18/2022] Open
Abstract
The shelterin protein POT1 has been found mutated in many different familial and sporadic cancers, however, no mouse models to understand the pathobiology of these mutations have been developed so far. To address the molecular mechanisms underlying the tumorigenic effects of POT1 mutant proteins in humans, we have generated a mouse model for the human POT1R117C mutation found in Li-Fraumeni-Like families with cases of cardiac angiosarcoma by introducing this mutation in the Pot1a endogenous locus, knock-in for Pot1aR117C. We find here that both mouse embryonic fibroblasts (MEFs) and tissues from Pot1a+/ki mice show longer telomeres than wild-type controls. Longer telomeres in Pot1a+/ki MEFs are dependent on telomerase activity as they are not found in double mutant Pot1a+/kiTert-/- telomerase-deficient MEFs. By using complementation assays we further show that POT1a pR117C exerts dominant-negative effects at telomeres. As in human Li-Fraumeni patients, heterozygous Pot1a+/ki mice spontaneously develop a high incidence of angiosarcomas, including cardiac angiosarcomas, and this is associated to the presence of abnormally long telomeres in endothelial cells as well as in the tumors. The Pot1a+/R117C mouse model constitutes a useful tool to understand human cancers initiated by POT1 mutations. We have generated a mouse model for the human POT1R117C mutation found in Li-Fraumeni-Like (LFL) families with cases of cardiac angiosarcoma by introducing this mutation in the Pot1a endogenous locus, knock-in for Pot1aR117C. The Pot1a+/ki mice show longer telomeres than wild-type controls. Longer telomeres in mutant mice are dependent on telomerase activity as they are not found in a telomerase deficient background. As in human Li-Fraumeni patients, heterozygous Pot1a+/ki mice spontaneously develop a high incidence of angiosarcomas, including cardiac angiosarcomas, and this is associated to the presence of abnormally long telomeres in endothelial cells as well as in the tumors. The ki-Pot1aR117C mouse constitutes a potential pre-clinical mouse model for LFL syndrome presenting with high angiosarcoma incidence that could provide in the future a very useful tool for the study of treatments for these tumors.
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Affiliation(s)
- Paula Martínez
- Telomeres and Telomerase Group, Molecular Oncology Program, Spanish National Cancer Centre (CNIO), Madrid, Spain
| | - Raúl Sánchez-Vázquez
- Telomeres and Telomerase Group, Molecular Oncology Program, Spanish National Cancer Centre (CNIO), Madrid, Spain
| | - Iole Ferrara-Romeo
- Telomeres and Telomerase Group, Molecular Oncology Program, Spanish National Cancer Centre (CNIO), Madrid, Spain
| | - Rosa Serrano
- Telomeres and Telomerase Group, Molecular Oncology Program, Spanish National Cancer Centre (CNIO), Madrid, Spain
| | - Juana M. Flores
- Animal Surgery and Medicine Department, Faculty of Veterinary Science, Complutense University of Madrid, Madrid, Spain
| | - Maria A. Blasco
- Telomeres and Telomerase Group, Molecular Oncology Program, Spanish National Cancer Centre (CNIO), Madrid, Spain
- * E-mail:
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5
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Suzuki T, Yamamoto Y, Sakamoto N, Suzuki H, Tajiri K, Ishizu T, Fujisawa Y, Noguchi M, Ieda M, Hiramatsu Y, Sekine I. Dramatic Recovery from Cardiovascular Collapse: Paclitaxel as an Urgent Treatment for Primary Cardiac Angiosarcoma. Intern Med 2021; 60:67-71. [PMID: 32830183 PMCID: PMC7835460 DOI: 10.2169/internalmedicine.5420-20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We herein report three patients with cardiac angiosarcoma who were directly admitted to the intensive-care unit for hemodynamic instability with circulatory collapse. Using a multidisciplinary cardio-oncologic approach, we diagnosed their condition as angiosarcoma by an invasive biopsy and urgently started weekly paclitaxel administration despite their poor performance status. Their vital signs were soon stabilized, leading to the patients' discharge from the hospital. Although no treatment guidelines for cardiac angiosarcoma have been established, chemotherapy with paclitaxel can be an option for cases presenting with hemodynamic instability.
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Affiliation(s)
- Toshio Suzuki
- Department of Medical Oncology, Faculty of Medicine, University of Tsukuba, Japan
| | - Yoshiyuki Yamamoto
- Department of Medical Oncology, Faculty of Medicine, University of Tsukuba, Japan
- Department of Gastroenterology, Faculty of Medicine, University of Tsukuba, Japan
| | - Noriaki Sakamoto
- Department of Diagnostic Pathology, Faculty of Medicine, University of Tsukuba, Japan
| | - Hideo Suzuki
- Department of Medical Oncology, Faculty of Medicine, University of Tsukuba, Japan
- Department of Gastroenterology, Faculty of Medicine, University of Tsukuba, Japan
| | - Kazuko Tajiri
- Department of Cardiology, Faculty of Medicine, University of Tsukuba, Japan
| | - Tomoko Ishizu
- Department of Cardiology, Faculty of Medicine, University of Tsukuba, Japan
| | - Yasuhiro Fujisawa
- Department of Dermatology, Faculty of Medicine, University of Tsukuba, Japan
| | - Masayuki Noguchi
- Department of Diagnostic Pathology, Faculty of Medicine, University of Tsukuba, Japan
| | - Masaki Ieda
- Department of Cardiology, Faculty of Medicine, University of Tsukuba, Japan
| | - Yuji Hiramatsu
- Department of Cardiovascular Surgery, Faculty of Medicine, University of Tsukuba, Japan
| | - Ikuo Sekine
- Department of Medical Oncology, Faculty of Medicine, University of Tsukuba, Japan
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6
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Wu Y, Poulos RC, Reddel RR. Role of POT1 in Human Cancer. Cancers (Basel) 2020; 12:cancers12102739. [PMID: 32987645 PMCID: PMC7598640 DOI: 10.3390/cancers12102739] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Revised: 09/20/2020] [Accepted: 09/22/2020] [Indexed: 12/11/2022] Open
Abstract
Simple Summary The segmentation of eukaryotic genomes into discrete linear chromosomes requires processes to solve several major biological problems, including prevention of the chromosome ends being recognized as DNA breaks and compensation for the shortening that occurs when linear DNA is replicated. A specialized set of six proteins, collectively referred to as shelterin, is involved in both of these processes, and mutations in several of these are now known to be involved in cancer. Here, we focus on Protection of Telomeres 1 (POT1), the shelterin protein that appears to be most commonly involved in cancer, and consider the clinical significance of findings about its biological functions and the prevalence of inherited and acquired mutations in the POT1 gene. Abstract Telomere abnormalities facilitate cancer development by contributing to genomic instability and cellular immortalization. The Protection of Telomeres 1 (POT1) protein is an essential subunit of the shelterin telomere binding complex. It directly binds to single-stranded telomeric DNA, protecting chromosomal ends from an inappropriate DNA damage response, and plays a role in telomere length regulation. Alterations of POT1 have been detected in a range of cancers. Here, we review the biological functions of POT1, the prevalence of POT1 germline and somatic mutations across cancer predisposition syndromes and tumor types, and the dysregulation of POT1 expression in cancers. We propose a framework for understanding how POT1 abnormalities may contribute to oncogenesis in different cell types. Finally, we summarize the clinical implications of POT1 alterations in the germline and in cancer, and possible approaches for the development of targeted cancer therapies.
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Affiliation(s)
- Yangxiu Wu
- Cancer Research Unit, Children’s Medical Research Institute, Faculty of Medicine and Health, The University of Sydney, Westmead NSW 2145, Australia;
- ProCan® Cancer Data Science Group, Children’s Medical Research Institute, Faculty of Medicine and Health, The University of Sydney, Westmead NSW 2145, Australia;
| | - Rebecca C. Poulos
- ProCan® Cancer Data Science Group, Children’s Medical Research Institute, Faculty of Medicine and Health, The University of Sydney, Westmead NSW 2145, Australia;
| | - Roger R. Reddel
- Cancer Research Unit, Children’s Medical Research Institute, Faculty of Medicine and Health, The University of Sydney, Westmead NSW 2145, Australia;
- Correspondence: ; Tel.: +61-2-8865-2901
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7
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Calvete O, Garcia-Pavia P, Domínguez F, Mosteiro L, Pérez-Cabornero L, Cantalapiedra D, Zorio E, Ramón Y Cajal T, Crespo-Leiro MG, Teulé Á, Lázaro C, Morente MM, Urioste M, Benitez J. POT1 and Damage Response Malfunction Trigger Acquisition of Somatic Activating Mutations in the VEGF Pathway in Cardiac Angiosarcomas. J Am Heart Assoc 2019; 8:e012875. [PMID: 31510873 PMCID: PMC6818007 DOI: 10.1161/jaha.119.012875] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Background Mutations in the POT1 gene explain abnormally long telomeres and multiple tumors including cardiac angiosarcomas (CAS). However, the link between long telomeres and tumorigenesis is poorly understood. Methods and Results Here, we have studied the somatic landscape of 3 different angiosarcoma patients with mutations in the POT1 gene to further investigate this tumorigenesis process. In addition, the genetic landscape of 7 CAS patients without mutations in the POT1 gene has been studied. Patients with CAS and nonfunctional POT1 did not repress ATR (ataxia telangiectasia RAD3-related)-dependent DNA damage signaling and showed a constitutive increase of cell cycle arrest and somatic activating mutations in the VEGF (vascular endothelial growth factor)/angiogenesis pathway (KDR gene). The same observation was made in POT1 mutation carriers with tumors different from CAS and also in CAS patients without mutations in the POT1 gene but with mutations in other genes involved in DNA damage signaling. Conclusions Inhibition of POT1 function and damage-response malfunction activated DNA damage signaling and increased cell cycle arrest as well as interfered with apoptosis, which would permit acquisition of somatic mutations in the VEGF/angiogenesis pathway that drives tumor formation. Therapies based on the inhibition of damage signaling in asymptomatic carriers may diminish defects on cell cycle arrest and thus prevent the apoptosis deregulation that leads to the acquisition of driver mutations.
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Affiliation(s)
- Oriol Calvete
- Human Genetics Group Spanish National Cancer Research Center (CNIO) Madrid Spain.,Center for Biomedical Network Research on Rare Diseases (CIBERER) Madrid Spain
| | - Pablo Garcia-Pavia
- Department of Cardiology Hospital Universitario Puerta de Hierro Madrid Spain.,Center for Biomedical Network Research on Cardiovascular Diseases (CIBERCV) Madrid Spain.,Facultad de Ciencias de la Salud Universidad Francisco de Vitoria (UFV) Madrid Spain
| | - Fernando Domínguez
- Department of Cardiology Hospital Universitario Puerta de Hierro Madrid Spain.,Center for Biomedical Network Research on Cardiovascular Diseases (CIBERCV) Madrid Spain.,Spanish National Cardiovascular Research Center (CNIC) Madrid Spain
| | - Lluc Mosteiro
- Tumour Suppression Group Spanish National Cancer Research Center (CNIO) Madrid Spain
| | - Lucía Pérez-Cabornero
- Medical Genetics Unit Sistemas Genómicos Parque Tecnológico de Valencia Paterna Spain
| | - Diego Cantalapiedra
- Medical Genetics Unit Sistemas Genómicos Parque Tecnológico de Valencia Paterna Spain
| | - Esther Zorio
- Department of Cardiology Hospital Universitario y Politécnico La Fe Valencia Spain
| | | | - Maria G Crespo-Leiro
- Department of Cardiology Hospital Universitario Puerta de Hierro Madrid Spain.,Department of Cardiology Instituto de Investigación Biomédica de A Coruña (INIBIC) Complexo Hospitalario Universitario de A Coruña (CHUfSiAC) A Coruña Spain
| | - Álex Teulé
- Hereditary Cancer Program-Medical Oncology Service Catalan Institute of Oncology ICO-IDIBELL and CIBERONC Barcelona Spain
| | - Conxi Lázaro
- Medical Oncology Service Catalan Institute of Oncology ICO-IDIBELL and CIBERONC Barcelona Spain
| | - Manuel M Morente
- Biobank Unit Spanish National Cancer Research Center (CNIO) Madrid Spain
| | - Miguel Urioste
- Center for Biomedical Network Research on Rare Diseases (CIBERER) Madrid Spain.,Familial Cancer Clinical Unit Spanish National Cancer Research Center (CNIO) Madrid Spain
| | - Javier Benitez
- Human Genetics Group Spanish National Cancer Research Center (CNIO) Madrid Spain.,Center for Biomedical Network Research on Rare Diseases (CIBERER) Madrid Spain
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