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Gervas P, Aleksey MY, Nataliya BN, Kollantay O, Evgeny CL, Cherdyntseva NV. A Systematic Review of the Prevalence of Germline BRCA mutations in North Asia Breast Cancer Patients. Asian Pac J Cancer Prev 2024; 25:1891-1902. [PMID: 38918649 PMCID: PMC11382858 DOI: 10.31557/apjcp.2024.25.6.1891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Indexed: 06/27/2024] Open
Abstract
OBJECTIVE The BRCA1/2 mutation status testing is the global standard of care for breast cancer patients with a family history of cancer. BRCA1/2 mutations are known to be ethno-specific. For some ethnic groups of the Northern Asia (Buryats, Yakuts, Altaians, Tuvans, Khakasses, etc.) the founder mutations in the BRCA1/2 genes have not been revealed. This systematic review was conducted to assess the prevalence of BRCA1/2 mutation in breast cancer patients inhabiting Eastern Europe and Northern Asia (or Siberia). METHODS A total of 23,561 studies published between 2014 and 2024 were analyzed, of which 55 were included in the review. The literature search was conducted using RusMed, Cyberleninka, Google Scholar, eLibrary, NCBI databases (n=5) and conference papers. RESULTS The founder mutations (c.5266dupC and/or c.181T>G) of BRCA1 gene that were frequently observed in the Slav peoples were also identified in Chechens, Armenians, Bashkirs, Ukrainians, Mordovians, Mari, Kabardians, Tatars, Uzbeks, Kyrgyz, Ossetians, Khanty indigenous peoples and Adygs. For Chechens, Kabardians, Ingush, Buryats, Khakasses, Sakha, Tuvans and Armenians, rare pathogenic variants of the BRCA1/2, ATM, СНЕК2, BRIP1, NBN, PTEN, TP53, PMS1, XPA, LGR4, BRWD1 and PALB2 genes were found. No data are available about the frequency of pathogenic BRCA1/2 mutations for ethnic groups, such as the Udmurts, Komi, Tajiks, Tabasarans, and Nogais indigenous people. CONCLUSION This is the first systematic review that provides the spectrum of BRCA mutations in ethnic groups of breast cancer patients inhabiting Eastern Europe and Northern Asia. It has been shown that the mutations are ethnospecific (varied widely within groups) and not all groups are equally well studied. Further studies on the ethnic specificity of BRCA gene mutations are required.
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Affiliation(s)
- Polina Gervas
- Department of Cancer Research, Cancer Research Institute Tomsk, National Research Medical Center, Russian Academy of Science, Tomsk, Russia
- Department of Physical and Colloid Chemistry, National Tomsk State University, Tomsk, Russia
| | - Molokov Yu Aleksey
- Department of Cancer Research, Cancer Research Institute Tomsk, National Research Medical Center, Russian Academy of Science, Tomsk, Russia
| | - Babyshkina N Nataliya
- Department of Cancer Research, Cancer Research Institute Tomsk, National Research Medical Center, Russian Academy of Science, Tomsk, Russia
| | - Olesya Kollantay
- Department of Cancer Research, Cancer Research Institute Tomsk, National Research Medical Center, Russian Academy of Science, Tomsk, Russia
| | - Choynzonov L Evgeny
- Department of Cancer Research, Cancer Research Institute Tomsk, National Research Medical Center, Russian Academy of Science, Tomsk, Russia
| | - Nadezda V Cherdyntseva
- Department of Cancer Research, Cancer Research Institute Tomsk, National Research Medical Center, Russian Academy of Science, Tomsk, Russia
- Department of Physical and Colloid Chemistry, National Tomsk State University, Tomsk, Russia
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2
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Hitomi M, Venegas J, Kang SC, Eng C. Differential cell cycle checkpoint evasion by PTEN germline mutations associated with dichotomous phenotypes of cancer versus autism spectrum disorder. Oncogene 2023; 42:3698-3707. [PMID: 37907589 DOI: 10.1038/s41388-023-02867-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 09/29/2023] [Accepted: 10/10/2023] [Indexed: 11/02/2023]
Abstract
Individuals with a PTEN germline mutation receive the molecular diagnosis of PTEN hamartoma tumor syndrome (PHTS). PHTS displays a complex spectrum of clinical phenotypes including harmartomas, predisposition to cancers, and autism spectrum disorder (ASD). Clear-cut genotype-phenotype correlations are yet to be established due to insufficient information on the PTEN function being impacted by mutations. To fill this knowledge gap, we compared functional impacts of two selected missense PTEN mutant alleles, G132D and M134R, each respectively being associated with distinct clinical phenotype, ASD or thyroid cancer without ASD using gene-edited human induced pluripotent stem cells (hiPSCs). In homozygous hiPSCs, PTEN expression was severely reduced by M134R mutation due to shortened protein half-life. G132D suppressed PTEN expression to a lesser extent than Μ134R mutation without altering protein half-life. When challenged with γ-irradiation, G132D heterozygous cells exited radiation-induced G2 arrest earlier than wildtype and M134R heterozygous hiPSCs despite the similar DNA damage levels as the latter two. Immunoblotting analyses suggested that γ-irradiation induced apoptosis in G132D heterozygous cells to lesser degrees than in the hiPSCs of other genotypes. These data suggest that ASD-associated G132D allele promotes genome instability by premature cell cycle reentry with incomplete DNA repair.
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Affiliation(s)
- Masahiro Hitomi
- Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44195, USA
- Department of Molecular Medicine, The Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH, 44195, USA
| | - Juan Venegas
- Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44195, USA
| | - Shin Chung Kang
- Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44195, USA
| | - Charis Eng
- Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44195, USA.
- Department of Molecular Medicine, The Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH, 44195, USA.
- Center for Personalized Genetic Healthcare, Medical Specialties Institute, Cleveland Clinic, Cleveland, OH, 44195, USA.
- Department of Genetics and Genome Science, Case Western Reserve University School of Medicine, Cleveland, OH, 44116, USA.
- Case Comprehensive Cancer Center, Case Western Reserve University School of Medicine, Cleveland, OH, 44116, USA.
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3
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Tomanelli M, Florio T, Vargas GC, Pagano A, Modesto P. Domestic Animal Models of Central Nervous System Tumors: Focus on Meningiomas. Life (Basel) 2023; 13:2284. [PMID: 38137885 PMCID: PMC10744527 DOI: 10.3390/life13122284] [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: 10/13/2023] [Accepted: 11/09/2023] [Indexed: 12/24/2023] Open
Abstract
Intracranial primary tumors (IPTs) are aggressive forms of malignancies that cause high mortality in both humans and domestic animals. Meningiomas are frequent adult IPTs in humans, dogs, and cats, and both benign and malignant forms cause a decrease in life quality and survival. Surgery is the primary therapeutic approach to treat meningiomas, but, in many cases, it is not resolutive. The chemotherapy and targeted therapy used to treat meningiomas also display low efficacy and many side effects. Therefore, it is essential to find novel pharmacological approaches to increase the spectrum of therapeutic options for meningiomas. This review analyzes the similarities between human and domestic animal (dogs and cats) meningiomas by evaluating the molecular and histological characteristics, diagnosis criteria, and treatment options and highlighting possible research areas to identify novel targets and pharmacological approaches, which are useful for the diagnosis and therapy of this neoplasia to be used in human and veterinary medicine.
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Affiliation(s)
- Michele Tomanelli
- Department of Experimental Medicine, University of Genova, 16132 Genova, Italy; (G.C.V.); (A.P.)
| | - Tullio Florio
- Pharmacology Section, Department of Internal Medicine (DIMI), University of Genova, 16126 Genova, Italy;
- IRCCS Ospedale Policlinico San Martino, 16132 Genova, Italy
| | - Gabriela Coronel Vargas
- Department of Experimental Medicine, University of Genova, 16132 Genova, Italy; (G.C.V.); (A.P.)
| | - Aldo Pagano
- Department of Experimental Medicine, University of Genova, 16132 Genova, Italy; (G.C.V.); (A.P.)
- IRCCS Ospedale Policlinico San Martino, 16132 Genova, Italy
| | - Paola Modesto
- National Reference Center for Veterinary and Comparative Oncology, Veterinary Medical Research Institute for Piemonte, Liguria and Valle d’Aosta, 10154 Torino, Italy
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4
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Langdon CG. Nuclear PTEN's Functions in Suppressing Tumorigenesis: Implications for Rare Cancers. Biomolecules 2023; 13:biom13020259. [PMID: 36830628 PMCID: PMC9953540 DOI: 10.3390/biom13020259] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 01/25/2023] [Accepted: 01/28/2023] [Indexed: 01/31/2023] Open
Abstract
Phosphatase and tensin homolog (PTEN) encodes a tumor-suppressive phosphatase with both lipid and protein phosphatase activity. The tumor-suppressive functions of PTEN are lost through a variety of mechanisms across a wide spectrum of human malignancies, including several rare cancers that affect pediatric and adult populations. Originally discovered and characterized as a negative regulator of the cytoplasmic, pro-oncogenic phosphoinositide-3-kinase (PI3K) pathway, PTEN is also localized to the nucleus where it can exert tumor-suppressive functions in a PI3K pathway-independent manner. Cancers can usurp the tumor-suppressive functions of PTEN to promote oncogenesis by disrupting homeostatic subcellular PTEN localization. The objective of this review is to describe the changes seen in PTEN subcellular localization during tumorigenesis, how PTEN enters the nucleus, and the spectrum of impacts and consequences arising from disrupted PTEN nuclear localization on tumor promotion. This review will highlight the immediate need in understanding not only the cytoplasmic but also the nuclear functions of PTEN to gain more complete insights into how important PTEN is in preventing human cancers.
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Affiliation(s)
- Casey G. Langdon
- Department of Pediatrics, Darby Children’s Research Institute, Medical University of South Carolina, Charleston, SC 29425, USA; ; Tel.: +1-(843)-792-9289
- Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
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5
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Jiang TY, Pan YF, Wan ZH, Lin YK, Zhu B, Yuan ZG, Ma YH, Shi YY, Zeng TM, Dong LW, Tan YX, Wang HY. PTEN status determines chemosensitivity to proteasome inhibition in cholangiocarcinoma. Sci Transl Med 2021; 12:12/562/eaay0152. [PMID: 32967970 DOI: 10.1126/scitranslmed.aay0152] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 12/31/2019] [Accepted: 07/28/2020] [Indexed: 12/23/2022]
Abstract
Patient-derived xenografts (PDXs) and PDX-derived cells (PDCs) are useful in preclinical research. We performed a drug screening assay using PDCs and identified proteasome inhibitors as promising drugs for cholangiocarcinoma (CCA) treatment. Furthermore, we determined that phosphate and tensin homology deleted on chromosome ten (PTEN) deficiency promotes protein synthesis and proteasome subunit expression and proteolytic activity, creating a dependency on the proteasome for cancer cell growth and survival. Thus, targeting the proteasome machinery with the inhibitor bortezomib inhibited the proliferation and survival of CCA cells lacking functional PTEN. Therapeutic evaluation of PDXs, autochthonous mouse models, and patients confirmed this dependency on the proteasome. Mechanistically, we found that PTEN promoted the nuclear translocation of FOXO1, resulting in the increased expression of BACH1 and MAFF BACH1 and MAFF are transcriptional regulators that recognize the antioxidant response element, which is present in genes encoding proteasome subunits. PTEN induced the accumulation and nuclear translocation of these proteins, which directly repressed the transcription of genes encoding proteasome subunits. We revealed that the PTEN-proteasome axis is a potential target for therapy in PTEN-deficient CCA and other PTEN-deficient cancers.
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Affiliation(s)
- Tian-Yi Jiang
- International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Institute, Second Military Medical University, Shanghai 200438, China.,National Center for Liver Cancer, Shanghai 201805, China
| | - Yu-Fei Pan
- National Center for Liver Cancer, Shanghai 201805, China.,Shanghai Key Laboratory of Hepato-biliary Tumor Biology, Shanghai 200438, China
| | - Zheng-Hua Wan
- National Center for Liver Cancer, Shanghai 201805, China
| | - Yun-Kai Lin
- International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Institute, Second Military Medical University, Shanghai 200438, China.,National Center for Liver Cancer, Shanghai 201805, China
| | - Bin Zhu
- Department of Surgery, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200438, China
| | - Zhen-Gang Yuan
- Department of Surgery, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200438, China
| | - Yun-Han Ma
- International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Institute, Second Military Medical University, Shanghai 200438, China.,National Center for Liver Cancer, Shanghai 201805, China
| | - Yuan-Yuan Shi
- International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Institute, Second Military Medical University, Shanghai 200438, China
| | - Tian-Mei Zeng
- Department of Surgery, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200438, China
| | - Li-Wei Dong
- International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Institute, Second Military Medical University, Shanghai 200438, China. .,Shanghai Key Laboratory of Hepato-biliary Tumor Biology, Shanghai 200438, China
| | - Ye-Xiong Tan
- National Center for Liver Cancer, Shanghai 201805, China. .,Shanghai Key Laboratory of Hepato-biliary Tumor Biology, Shanghai 200438, China
| | - Hong-Yang Wang
- International Cooperation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Institute, Second Military Medical University, Shanghai 200438, China. .,National Center for Liver Cancer, Shanghai 201805, China.,Shanghai Key Laboratory of Hepato-biliary Tumor Biology, Shanghai 200438, China.,State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200127, China.,Laboratory of Signaling Regulation and Targeting Therapy of Liver Cancer, Second Military Medical University & Ministry of Education, Shanghai 200438, China
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6
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Gervas P, Molokov A, Schegoleva A, Kiselev A, Babyshkina N, Pisareva L, Tyukalov Y, Choynzonov E, Cherdyntseva N. New germline mutations in non-BRCA genes among breast cancer women of Mongoloid origin. Mol Biol Rep 2020; 47:5315-5321. [PMID: 32601921 DOI: 10.1007/s11033-020-05612-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Accepted: 06/20/2020] [Indexed: 12/30/2022]
Abstract
In accordance with the Asian BRCA Consortium data, there is a significant difference in incidence rate of breast cancer depending on age, as well as spectrum and prevalence of BRCA1/2 mutations between Mongoloid (East Asian) and Caucasoid (European) people. However, European strategies to identify familial BC are still applied to the Asian population, including Russian Mongoloids (Khakas, Buryats, Tyvans and Yakuts and others). The main purpose of the study was to identify molecular changes associated with hereditary BC in Russian Mongoloid BC patients (Buryats). Thirty-nine patients were included in the study. Genomic DNA extracted from lymphocytes was used to prepare DNA-libraries. Target sequencing was designed to cover 27 genes, such as ATM, APC, BARD1, BRCA1, BRCA2, BRIP1, CDH1, CHEK2 and others. Paired-end sequencing (2 × 150 bp) was conducted on a NextSeq 500 system (Illumina, USA). Three pathogenic mutations in non-BRCA genes were found (prevalence of 8%). The pathogenic mutations were found in the RAD51D and PTEN genes. The pathogenic variant in the RAD51D gene (rs137886232, NC_000017.10:g.33428366G>A, p.R141X) was observed in two unrelated individuals aged under 40. One of these patients had a family history of late-onset stomach cancer in second-degree relatives. The pathogenic mutation in the PTEN gene (rs786201044, NC_000010.10:g.89692922T>C, p.C136R) was observed in a 38 years old breast cancer patient with no family history. In our study, we first describe pathogenic mutations in RAD51D and PTEN genes found in young Buryat patients.
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Affiliation(s)
- Polina Gervas
- Cancer Research Institute, Tomsk National Research Medical Center, Russian Academy of Science, 5 Kooperativny Street, Tomsk, Russia, 634009.
| | - Aleksey Molokov
- Cancer Research Institute, Tomsk National Research Medical Center, Russian Academy of Science, 5 Kooperativny Street, Tomsk, Russia, 634009
| | - Anastasia Schegoleva
- Cancer Research Institute, Tomsk National Research Medical Center, Russian Academy of Science, 5 Kooperativny Street, Tomsk, Russia, 634009
| | - Artem Kiselev
- Federal Almazov North-West Medical Research Centre, St. Petersburg, Russia
| | - Nataliya Babyshkina
- Cancer Research Institute, Tomsk National Research Medical Center, Russian Academy of Science, 5 Kooperativny Street, Tomsk, Russia, 634009.,Tomsk State University, Tomsk, Russia
| | - Lubov Pisareva
- Cancer Research Institute, Tomsk National Research Medical Center, Russian Academy of Science, 5 Kooperativny Street, Tomsk, Russia, 634009
| | - Yury Tyukalov
- Cancer Research Institute, Tomsk National Research Medical Center, Russian Academy of Science, 5 Kooperativny Street, Tomsk, Russia, 634009
| | - Evgeny Choynzonov
- Cancer Research Institute, Tomsk National Research Medical Center, Russian Academy of Science, 5 Kooperativny Street, Tomsk, Russia, 634009
| | - Nadezda Cherdyntseva
- Cancer Research Institute, Tomsk National Research Medical Center, Russian Academy of Science, 5 Kooperativny Street, Tomsk, Russia, 634009.,Tomsk State University, Tomsk, Russia
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7
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Abstract
Germline pathogenic phosphatase and tensin homolog (PTEN) mutations cause PTEN hamartoma tumor syndrome (PHTS), characterized by various benign and malignant tumors of the thyroid, breast, endometrium, and other organs. Patients with PHTS may present with other clinical features such as macrocephaly, intestinal polyposis, cognitive changes, and pathognomonic skin changes. Clinically, deregulation of PTEN function is implicated in other human diseases in addition to many types of human cancer. PTEN is an important phosphatase that counteracts one of the most critical cancer pathways: the phosphatidylinositol 3-kinase (PI3K)/AKT signaling pathways. Although PTEN can dephosphorylate lipids and proteins, it also has functions independent of phosphatase activity in normal and pathological states. It is positively and negatively regulated at the transcriptional level as well as posttranslationally by phosphorylation, ubiquitylation, oxidation, and acetylation. Although most of its tumor-suppressor activity is likely to be caused by lipid dephosphorylation at the plasma membrane, PTEN also resides in the cytoplasm and nucleus, and its subcellular distribution is under strict control. In this review, we highlight our current knowledge of PTEN function and recent discoveries in understanding PTEN function regulation and how this can be exploited therapeutically for cancer treatment.
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Affiliation(s)
- Joanne Ngeow
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore 639798.,Cancer Genetics Service, Division of Medical Oncology, National Cancer Centre, Singapore 169610.,Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195, USA
| | - Charis Eng
- Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195, USA.,Taussig Cancer Institute, Cleveland Clinic, Cleveland, Ohio 44195, USA.,Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106, USA.,Germline High Risk Cancer Focus Group, CASE Comprehensive Cancer Center, Case Western Reserve University, Cleveland, Ohio 44106, USA
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8
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McCabe MJ, Pinese M, Chan CL, Sheriff N, Thompson TJ, Grady J, Wong M, Gauthier MEA, Puttick C, Gayevskiy V, Hajdu E, Wong SQ, Barrett W, Earls P, Lukeis R, Cheng YY, Lin RCY, Thomas DM, Watkins DN, Dinger ME, McCormack AI, Cowley MJ. Genomic stratification and liquid biopsy in a rare adrenocortical carcinoma (ACC) case, with dual lung metastases. Cold Spring Harb Mol Case Stud 2019; 5:mcs.a003764. [PMID: 30936196 PMCID: PMC6549567 DOI: 10.1101/mcs.a003764] [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] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 02/11/2019] [Indexed: 12/22/2022] Open
Abstract
Adrenocortical carcinoma is a rare malignancy with a poor prognosis and few treatment options. Molecular characterization of this cancer remains limited. We present a case of an adrenocortical carcinoma (ACC) in a 37-yr-old female, with dual lung metastases identified 1 yr following commencement of adjuvant mitotane therapy. As standard therapeutic regimens are often unsuccessful in ACC, we undertook a comprehensive genomic study into this case to identify treatment options and monitor disease progress. We performed targeted and whole-genome sequencing of germline, primary tumor, and both metastatic tumors from this patient and monitored recurrence over 2 years using liquid biopsy for ctDNA and steroid hormone measurements. Sequencing revealed the primary and metastatic tumors were hyperhaploid, with extensive loss of heterozygosity but few structural rearrangements. Loss-of-function mutations were identified in MSH2, TP53, RB1, and PTEN, resulting in tumors with mismatch repair signatures and microsatellite instability. At the cellular level, tumors were populated by mitochondria-rich oncocytes. Longitudinal ctDNA mutation and hormone profiles were unable to detect micrometastatic disease, consistent with clinical indicators of disease remission. The molecular signatures in our ACC case suggested immunotherapy in the event of disease progression; however, the patient remains free of cancer. The extensive molecular analysis presented here could be applied to other rare and/or poorly stratified cancers to identify novel or repurpose existing therapeutic options, thereby broadly improving diagnoses, treatments, and prognoses.
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Affiliation(s)
- Mark J McCabe
- Kinghorn Centre for Clinical Genomics, Garvan Institute of Medical Research, Darlinghurst, New South Wales 2010, Australia.,Hormones and Cancer Group, Garvan Institute of Medical Research, Darlinghurst, New South Wales 2010, Australia.,Faculty of Medicine, St Vincent's Clinical School, UNSW Australia, Sydney, New South Wales 2010, Australia
| | - Mark Pinese
- Kinghorn Centre for Clinical Genomics, Garvan Institute of Medical Research, Darlinghurst, New South Wales 2010, Australia.,Cancer Research Division, Garvan Institute of Medical Research, Darlinghurst, New South Wales 2010, Australia
| | - Chia-Ling Chan
- Kinghorn Centre for Clinical Genomics, Garvan Institute of Medical Research, Darlinghurst, New South Wales 2010, Australia
| | - Nisa Sheriff
- Hormones and Cancer Group, Garvan Institute of Medical Research, Darlinghurst, New South Wales 2010, Australia.,Department of Endocrinology, St Vincent's Hospital, Sydney, New South Wales 2010, Australia
| | - Tanya J Thompson
- Hormones and Cancer Group, Garvan Institute of Medical Research, Darlinghurst, New South Wales 2010, Australia
| | - John Grady
- Kinghorn Centre for Clinical Genomics, Garvan Institute of Medical Research, Darlinghurst, New South Wales 2010, Australia
| | - Marie Wong
- Kinghorn Centre for Clinical Genomics, Garvan Institute of Medical Research, Darlinghurst, New South Wales 2010, Australia
| | - Marie-Emilie A Gauthier
- Kinghorn Centre for Clinical Genomics, Garvan Institute of Medical Research, Darlinghurst, New South Wales 2010, Australia
| | - Clare Puttick
- Kinghorn Centre for Clinical Genomics, Garvan Institute of Medical Research, Darlinghurst, New South Wales 2010, Australia
| | - Velimir Gayevskiy
- Kinghorn Centre for Clinical Genomics, Garvan Institute of Medical Research, Darlinghurst, New South Wales 2010, Australia
| | - Elektra Hajdu
- Kinghorn Centre for Clinical Genomics, Garvan Institute of Medical Research, Darlinghurst, New South Wales 2010, Australia
| | - Stephen Q Wong
- Molecular and Translational Genomics Laboratory, Peter MacCallum Cancer Centre, Melbourne, Victoria 3000, Australia
| | - Wade Barrett
- Department of Anatomical Pathology, St Vincent's Hospital, Sydney, New South Wales 2010, Australia
| | - Peter Earls
- Department of Anatomical Pathology, St Vincent's Hospital, Sydney, New South Wales 2010, Australia
| | - Robyn Lukeis
- Department of Anatomical Pathology, St Vincent's Hospital, Sydney, New South Wales 2010, Australia
| | - Yuen Y Cheng
- Asbestos Diseases Research Institute, The University of Sydney, Sydney, New South Wales 2139, Australia
| | - Ruby C Y Lin
- Asbestos Diseases Research Institute, The University of Sydney, Sydney, New South Wales 2139, Australia.,Centre for Infectious Diseases and Microbiology, The Westmead Institute for Medical Research, Westmead, New South Wales 2145, Australia
| | - David M Thomas
- Cancer Research Division, Garvan Institute of Medical Research, Darlinghurst, New South Wales 2010, Australia
| | - D Neil Watkins
- Cancer Research Division, Garvan Institute of Medical Research, Darlinghurst, New South Wales 2010, Australia
| | - Marcel E Dinger
- Kinghorn Centre for Clinical Genomics, Garvan Institute of Medical Research, Darlinghurst, New South Wales 2010, Australia.,Faculty of Medicine, St Vincent's Clinical School, UNSW Australia, Sydney, New South Wales 2010, Australia
| | - Ann I McCormack
- Hormones and Cancer Group, Garvan Institute of Medical Research, Darlinghurst, New South Wales 2010, Australia.,Faculty of Medicine, St Vincent's Clinical School, UNSW Australia, Sydney, New South Wales 2010, Australia.,Department of Endocrinology, St Vincent's Hospital, Sydney, New South Wales 2010, Australia
| | - Mark J Cowley
- Kinghorn Centre for Clinical Genomics, Garvan Institute of Medical Research, Darlinghurst, New South Wales 2010, Australia.,Faculty of Medicine, St Vincent's Clinical School, UNSW Australia, Sydney, New South Wales 2010, Australia.,Computational Biology Group, Children's Cancer Institute, Kensington, New South Wales 2031, Australia
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9
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Yehia L, Ngeow J, Eng C. PTEN-opathies: from biological insights to evidence-based precision medicine. J Clin Invest 2019; 129:452-464. [PMID: 30614812 DOI: 10.1172/jci121277] [Citation(s) in RCA: 117] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The tumor suppressor phosphatase and tensin homolog (PTEN) classically counteracts the PI3K/AKT/mTOR signaling cascade. Germline pathogenic PTEN mutations cause PTEN hamartoma tumor syndrome (PHTS), featuring various benign and malignant tumors, as well as neurodevelopmental disorders such as autism spectrum disorder. Germline and somatic mosaic mutations in genes encoding components of the PI3K/AKT/mTOR pathway downstream of PTEN predispose to syndromes with partially overlapping clinical features, termed the "PTEN-opathies." Experimental models of PTEN pathway disruption uncover the molecular and cellular processes influencing clinical phenotypic manifestations. Such insights not only teach us about biological mechanisms in states of health and disease, but also enable more accurate gene-informed cancer risk assessment, medical management, and targeted therapeutics. Hence, the PTEN-opathies serve as a prototype for bedside to bench, and back to the bedside, practice of evidence-based precision medicine.
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Affiliation(s)
- Lamis Yehia
- Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Joanne Ngeow
- Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA.,Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore.,Cancer Genetics Service, Division of Medical Oncology, National Cancer Centre, Singapore.,Oncology Academic Program, Duke-NUS Graduate Medical School, Singapore
| | - Charis Eng
- Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA.,Taussig Cancer Institute, Cleveland Clinic, Cleveland, Ohio, USA.,Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA.,Germline High Risk Cancer Focus Group, Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, Ohio, USA
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10
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Osinalde N, Duarri A, Ramirez J, Barrio R, Perez de Nanclares G, Mayor U. Impaired proteostasis in rare neurological diseases. Semin Cell Dev Biol 2018; 93:164-177. [PMID: 30355526 DOI: 10.1016/j.semcdb.2018.10.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2018] [Revised: 10/09/2018] [Accepted: 10/16/2018] [Indexed: 12/19/2022]
Abstract
Rare diseases are classified as such when their prevalence is 1:2000 or lower, but even if each of them is so infrequent, altogether more than 300 million people in the world suffer one of the ∼7000 diseases considered as rare. Over 1200 of these disorders are known to affect the brain or other parts of our nervous system, and their symptoms can affect cognition, motor function and/or social interaction of the patients; we refer collectively to them as rare neurological disorders or RNDs. We have focused this review on RNDs known to have compromised protein homeostasis pathways. Proteostasis can be regulated and/or altered by a chain of cellular mechanisms, from protein synthesis and folding, to aggregation and degradation. Overall, we provide a list comprised of above 215 genes responsible for causing more than 170 distinct RNDs, deepening on some representative diseases, including as well a clinical view of how those diseases are diagnosed and dealt with. Additionally, we review existing methodologies for diagnosis and treatment, discussing the potential of specific deubiquitinating enzyme inhibition as a future therapeutic avenue for RNDs.
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Affiliation(s)
- Nerea Osinalde
- Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, University of the Basque Country (UPV/EHU), 01006 Vitoria-Gasteiz, Spain
| | - Anna Duarri
- Barcelona Stem Cell Bank, Center of Regenerative Medicine in Barcelona, 08908 Hospitalet de Llobregat, Barcelona, Spain
| | - Juanma Ramirez
- Department of Biochemistry and Molecular Biology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), 48940 Leioa, Spain
| | - Rosa Barrio
- Functional Genomics Unit, CIC bioGUNE, 48160 Derio, Spain
| | - Guiomar Perez de Nanclares
- Molecular (Epi)Genetics Laboratory, BioAraba National Health Institute, Hospital Universitario Araba-Txagorritxu, Vitoria-Gasteiz, Alava, Spain
| | - Ugo Mayor
- Department of Biochemistry and Molecular Biology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), 48940 Leioa, Spain; Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain.
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11
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Cavaillé M, Ponelle-Chachuat F, Uhrhammer N, Viala S, Gay-Bellile M, Privat M, Bidet Y, Bignon YJ. Early Onset Multiple Primary Tumors in Atypical Presentation of Cowden Syndrome Identified by Whole-Exome-Sequencing. Front Genet 2018; 9:353. [PMID: 30233642 PMCID: PMC6127642 DOI: 10.3389/fgene.2018.00353] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Accepted: 08/10/2018] [Indexed: 12/17/2022] Open
Abstract
A family with an aggregation of rare early onset multiple primary tumors has been managed in our oncogenetics department: the proband developed four early onset carcinomas between ages 31 and 33 years, including acral melanoma, bilateral clear cell renal carcinoma (RC), and follicular variant of papillary thyroid carcinoma. The proband's parent developed orbital lymphoma and small intestine mucosa-associated lymphoid tissue (MALT) lymphoma between 40 and 50 years old. Whole-exome-sequencing (WES) of the nuclear family (proband, parents, and sibling) identified in the proband a de novo deleterious heterozygous mutation c.1003C > T (p.Arg335∗) in the phosphatase and tensin homolog (PTEN) gene. Furthermore, WES allowed analysis of the nuclear family's genetic background, and identified deleterious variants in two candidate modifier genes: CEACAM1 and MIB2. CEACAM1, a tumor suppressor gene, presents loss of expression in clear cell RC and is involved in proliferation of B cells. It could explain in part the phenotype of proband's parent and the occurrence of clear cell RC in the proband. Deleterious mutations in the MIB2 gene are associated with melanoma invasion, and could explain the occurrence of melanoma in the proband. Cowden syndrome is a hereditary autosomal dominant disorder associated with increased risk of muco-cutaneous features, hamartomatous tumors, and cancer. This atypical presentation, including absence of muco-cutaneous lesions, four primary early onset tumors and bilateral clear cell RC, has not been described before. This encourages including the PTEN gene in panel testing in the context of early onset RC, whatever the histological subtype. Further studies are required to determine the implication of CEACAM1 and MIB2 in the severity of Cowden syndrome in our proband and occurrence of early onset MALT lymphoma in a parent.
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Affiliation(s)
- Mathias Cavaillé
- INSERM, U1240 Imagerie Moléculaire et Stratégies Théranostiques, Université Clermont Auvergne, Clermont-Ferrand, France.,Département d'Oncogénétique, Centre Jean Perrin, Clermont-Ferrand, France
| | - Flora Ponelle-Chachuat
- INSERM, U1240 Imagerie Moléculaire et Stratégies Théranostiques, Université Clermont Auvergne, Clermont-Ferrand, France.,Département d'Oncogénétique, Centre Jean Perrin, Clermont-Ferrand, France
| | - Nancy Uhrhammer
- INSERM, U1240 Imagerie Moléculaire et Stratégies Théranostiques, Université Clermont Auvergne, Clermont-Ferrand, France.,Département d'Oncogénétique, Centre Jean Perrin, Clermont-Ferrand, France
| | - Sandrine Viala
- INSERM, U1240 Imagerie Moléculaire et Stratégies Théranostiques, Université Clermont Auvergne, Clermont-Ferrand, France.,Département d'Oncogénétique, Centre Jean Perrin, Clermont-Ferrand, France
| | - Mathilde Gay-Bellile
- INSERM, U1240 Imagerie Moléculaire et Stratégies Théranostiques, Université Clermont Auvergne, Clermont-Ferrand, France.,Département d'Oncogénétique, Centre Jean Perrin, Clermont-Ferrand, France
| | - Maud Privat
- INSERM, U1240 Imagerie Moléculaire et Stratégies Théranostiques, Université Clermont Auvergne, Clermont-Ferrand, France.,Département d'Oncogénétique, Centre Jean Perrin, Clermont-Ferrand, France
| | - Yannick Bidet
- INSERM, U1240 Imagerie Moléculaire et Stratégies Théranostiques, Université Clermont Auvergne, Clermont-Ferrand, France.,Département d'Oncogénétique, Centre Jean Perrin, Clermont-Ferrand, France
| | - Yves-Jean Bignon
- INSERM, U1240 Imagerie Moléculaire et Stratégies Théranostiques, Université Clermont Auvergne, Clermont-Ferrand, France.,Département d'Oncogénétique, Centre Jean Perrin, Clermont-Ferrand, France
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12
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Smith IN, Thacker S, Jaini R, Eng C. Dynamics and structural stability effects of germline PTEN mutations associated with cancer versus autism phenotypes. J Biomol Struct Dyn 2018; 37:1766-1782. [PMID: 29663862 DOI: 10.1080/07391102.2018.1465854] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Individuals with germline mutations in the tumor suppressor gene phosphatase and tensin homolog (PTEN), irrespective of clinical presentation, are diagnosed with PTEN hamartoma tumor syndrome (PHTS). PHTS confers a high risk of breast, thyroid, and other cancers or autism spectrum disorder (ASD) with macrocephaly. It remains unclear why mutations in one gene can lead to seemingly disparate phenotypes. Thus, we sought to identify differences in ASD vs. cancer-associated germline PTEN missense mutations by investigating putative structural effects induced by each mutation. We utilized a theoretical computational approach combining in silico structural analysis and molecular dynamics (MD) to interrogate 17 selected mutations from our patient population: six mutations were observed in patients with ASD (only), six mutations in patients with PHTS-associated cancer (only), four mutations shared across both phenotypes, and one mutation with both ASD and cancer. We demonstrate structural stability changes where all six cancer-associated mutations showed a global decrease in structural stability and increased dynamics across the domain interface with a proclivity to unfold, mediating a closed (inactive) active site. In contrast, five of the six ASD-associated mutations showed localized destabilization that contribute to the partial opening of the active site. Our results lend insight into distinctive structural effects of germline PTEN mutations associated with PTEN-ASD vs. those associated with PTEN-cancer, potentially aiding in identification of the shared and separate molecular features that contribute to autism or cancer, thus, providing a deeper understanding of genotype-phenotype relationships for germline PTEN mutations.
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Affiliation(s)
- Iris Nira Smith
- a Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic , Cleveland , OH , USA
| | - Stetson Thacker
- a Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic , Cleveland , OH , USA.,e Cleveland Clinic Lerner College of Medicine , Cleveland , OH , USA
| | - Ritika Jaini
- a Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic , Cleveland , OH , USA.,d Germline High Risk Cancer Focus Group , Comprehensive Cancer Center, Case Western Reserve University School of Medicine , Cleveland , OH , USA.,e Cleveland Clinic Lerner College of Medicine , Cleveland , OH , USA
| | - Charis Eng
- a Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic , Cleveland , OH , USA.,b Taussig Cancer Institute, Cleveland Clinic , Cleveland , OH , USA.,c Department of Genetics and Genome Sciences, Case Westren Reserve University School of Medicine , Cleveland , OH , USA.,d Germline High Risk Cancer Focus Group , Comprehensive Cancer Center, Case Western Reserve University School of Medicine , Cleveland , OH , USA.,e Cleveland Clinic Lerner College of Medicine , Cleveland , OH , USA
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13
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Nagel R, Semenova EA, Berns A. Drugging the addict: non-oncogene addiction as a target for cancer therapy. EMBO Rep 2016; 17:1516-1531. [PMID: 27702988 PMCID: PMC5090709 DOI: 10.15252/embr.201643030] [Citation(s) in RCA: 96] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2016] [Accepted: 08/24/2016] [Indexed: 12/13/2022] Open
Abstract
Historically, cancers have been treated with chemotherapeutics aimed to have profound effects on tumor cells with only limited effects on normal tissue. This approach was followed by the development of small‐molecule inhibitors that can target oncogenic pathways critical for the survival of tumor cells. The clinical targeting of these so‐called oncogene addictions, however, is in many instances hampered by the outgrowth of resistant clones. More recently, the proper functioning of non‐mutated genes has been shown to enhance the survival of many cancers, a phenomenon called non‐oncogene addiction. In the current review, we will focus on the distinct non‐oncogenic addictions found in cancer cells, including synthetic lethal interactions, the underlying stress phenotypes, and arising therapeutic opportunities.
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Affiliation(s)
- Remco Nagel
- Division of Molecular Genetics, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Ekaterina A Semenova
- Division of Molecular Genetics, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Anton Berns
- Division of Molecular Genetics, The Netherlands Cancer Institute, Amsterdam, The Netherlands
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14
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Gupta A, Leslie NR. Controlling PTEN (Phosphatase and Tensin Homolog) Stability: A DOMINANT ROLE FOR LYSINE 66. J Biol Chem 2016; 291:18465-73. [PMID: 27405757 DOI: 10.1074/jbc.m116.727750] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Indexed: 11/06/2022] Open
Abstract
Phosphatase and tensin homolog (PTEN) is a phosphoinositide lipid phosphatase and one of the most frequently disrupted tumor suppressors in many forms of cancer, with even small reductions in the expression levels of PTEN promoting cancer development. Although the post-translational ubiquitination of PTEN can control its stability, activity, and localization, a detailed understanding of how PTEN ubiquitination integrates with other cellular regulatory processes and may be dysregulated in cancer has been hampered by a poor understanding of the significance of ubiquitination at individual sites. Here we show that Lys(66) is not required for cellular activity, yet dominates over other PTEN ubiquitination sites in the regulation of protein stability. Notably, combined mutation of other sites (Lys(13), Lys(80), and Lys(289)) has relatively little effect on protein expression, protein stability, or PTEN polyubiquitination. The present work identifies a key role for Lys(66) in the regulation of PTEN expression and provides both an opportunity to improve the stability of PTEN as a protein therapy and a mechanistic basis for efforts to stabilize endogenous PTEN.
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Affiliation(s)
- Amit Gupta
- From the Institute of Biological Chemistry, Biophysics and Bioengineering, Heriot Watt University, James Nasmyth Building, Riccarton Campus, Edinburgh EH14 4AS, United Kingdom
| | - Nicholas R Leslie
- From the Institute of Biological Chemistry, Biophysics and Bioengineering, Heriot Watt University, James Nasmyth Building, Riccarton Campus, Edinburgh EH14 4AS, United Kingdom
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15
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Williams MR, Fricano-Kugler CJ, Getz SA, Skelton PD, Lee J, Rizzuto CP, Geller JS, Li M, Luikart BW. A Retroviral CRISPR-Cas9 System for Cellular Autism-Associated Phenotype Discovery in Developing Neurons. Sci Rep 2016; 6:25611. [PMID: 27161796 PMCID: PMC4861960 DOI: 10.1038/srep25611] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Accepted: 04/20/2016] [Indexed: 12/20/2022] Open
Abstract
Retroviruses expressing a fluorescent protein, Cas9, and a small guide RNA are used to mimic nonsense PTEN mutations from autism patients in developing mouse neurons. We compare the cellular phenotype elicited by CRISPR-Cas9 to those elicited using shRNA or Cre/Lox technologies and find that knockdown or knockout (KO) produced a corresponding moderate or severe neuronal hypertrophy in all cells. In contrast, the Cas9 approach produced missense and nonsense Pten mutations, resulting in a mix of KO-equivalent hypertrophic and wild type-like phenotypes. Importantly, despite this mixed phenotype, the neuronal hypertrophy resulting from Pten loss was evident on average in the population of manipulated cells. Having reproduced the known Pten KO phenotype using the CRISPR-Cas9 system we design viruses to target a gene that has recently been associated with autism, KATNAL2. Katnal2 deletion in the mouse results in decreased dendritic arborization of developing neurons. We conclude that retroviral implementation of the CRISPR-Cas9 system is an efficient system for cellular phenotype discovery in wild-type animals.
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Affiliation(s)
- Michael R Williams
- Department of Physiology and Neurobiology, Geisel School of Medicine at Dartmouth College, USA
| | | | - Stephanie A Getz
- Department of Physiology and Neurobiology, Geisel School of Medicine at Dartmouth College, USA
| | - Patrick D Skelton
- Department of Physiology and Neurobiology, Geisel School of Medicine at Dartmouth College, USA
| | - Jeonghoon Lee
- Department of Physiology and Neurobiology, Geisel School of Medicine at Dartmouth College, USA
| | - Christian P Rizzuto
- Department of Physiology and Neurobiology, Geisel School of Medicine at Dartmouth College, USA
| | - Joseph S Geller
- Department of Physiology and Neurobiology, Geisel School of Medicine at Dartmouth College, USA
| | - Meijie Li
- Department of Physiology and Neurobiology, Geisel School of Medicine at Dartmouth College, USA
| | - Bryan W Luikart
- Department of Physiology and Neurobiology, Geisel School of Medicine at Dartmouth College, USA
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16
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Sen K, Sarkar A, Maji RK, Ghosh Z, Gupta S, Ghosh TC. Deciphering the cross-talking of human competitive endogenous RNAs in K562 chronic myelogenous leukemia cell line. MOLECULAR BIOSYSTEMS 2016; 12:3633-3642. [DOI: 10.1039/c6mb00568c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Chronic myelogenous leukemia (CML) is a myeloproliferative disorder characterized by increased proliferation or abnormal accumulation of the granulocytic cell line without the depletion of their capacity to differentiate.
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Affiliation(s)
- Kamalika Sen
- Bioinformatics Centre
- Bose Institute
- Kolkata-700 054
- India
| | | | | | - Zhumur Ghosh
- Bioinformatics Centre
- Bose Institute
- Kolkata-700 054
- India
| | - Sanjib Gupta
- Bioinformatics Centre
- Bose Institute
- Kolkata-700 054
- India
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17
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ZHENG JUNFANG, DAI YUANPING, YANG ZHIYU, YANG LONGYAN, PENG ZHIQIANG, MENG RAN, XIONG YING, HE JUNQI. Ezrin-radixin-moesin-binding phosphoprotein-50 regulates EGF-induced AKT activation through interaction with EGFR and PTEN. Oncol Rep 2015; 35:530-7. [DOI: 10.3892/or.2015.4375] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 09/04/2015] [Indexed: 11/06/2022] Open
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18
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Tilot AK, Frazier TW, Eng C. Balancing Proliferation and Connectivity in PTEN-associated Autism Spectrum Disorder. Neurotherapeutics 2015; 12:609-19. [PMID: 25916396 PMCID: PMC4489960 DOI: 10.1007/s13311-015-0356-8] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Germline mutations in PTEN, which encodes a widely expressed phosphatase, was mapped to 10q23 and identified as the susceptibility gene for Cowden syndrome, characterized by macrocephaly and high risks of breast, thyroid, and other cancers. The phenotypic spectrum of PTEN mutations expanded to include autism with macrocephaly only 10 years ago. Neurological studies of patients with PTEN-associated autism spectrum disorder (ASD) show increases in cortical white matter and a distinctive cognitive profile, including delayed language development with poor working memory and processing speed. Once a germline PTEN mutation is found, and a diagnosis of phosphatase and tensin homolog (PTEN) hamartoma tumor syndrome made, the clinical outlook broadens to include higher lifetime risks for multiple cancers, beginning in childhood with thyroid cancer. First described as a tumor suppressor, PTEN is a major negative regulator of the phosphatidylinositol 3-kinase/protein kinase B/mammalian target of rapamycin (mTOR) signaling pathway-controlling growth, protein synthesis, and proliferation. This canonical function combines with less well-understood mechanisms to influence synaptic plasticity and neuronal cytoarchitecture. Several excellent mouse models of Pten loss or dysfunction link these neural functions to autism-like behavioral abnormalities, such as altered sociability, repetitive behaviors, and phenotypes like anxiety that are often associated with ASD in humans. These models also show the promise of mTOR inhibitors as therapeutic agents capable of reversing phenotypes ranging from overgrowth to low social behavior. Based on these findings, therapeutic options for patients with PTEN hamartoma tumor syndrome and ASD are coming into view, even as new discoveries in PTEN biology add complexity to our understanding of this master regulator.
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Affiliation(s)
- Amanda K. Tilot
- />Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195 USA
- />Department of Molecular Medicine, Cleveland Clinic Lerner College of Medicine, Cleveland, OH 44195 USA
| | - Thomas W. Frazier
- />Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195 USA
- />Center for Autism, Pediatric Institute, Cleveland Clinic, Cleveland, OH 44195 USA
- />Department of Pediatrics, Cleveland Clinic, Cleveland, OH 44195 USA
| | - Charis Eng
- />Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195 USA
- />Taussig Cancer Institute, Cleveland Clinic, Cleveland, OH 44195 USA
- />Stanley Shalom Zielony Institute of Nursing Excellence, Cleveland Clinic, Cleveland, OH 44195 USA
- />Department of Molecular Medicine, Cleveland Clinic Lerner College of Medicine, Cleveland, OH 44195 USA
- />Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH 44106 USA
- />Germline High Risk Focus Group, CASE Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH 44106 USA
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19
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Ngeow J, Eng C. PTEN hamartoma tumor syndrome: clinical risk assessment and management protocol. Methods 2014; 77-78:11-9. [PMID: 25461771 DOI: 10.1016/j.ymeth.2014.10.011] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2014] [Revised: 09/27/2014] [Accepted: 10/01/2014] [Indexed: 12/12/2022] Open
Abstract
The tumor suppressor phosphatase and tensin homolog deleted on chromosome 10 (PTEN) is an important phosphatase that counteracts one of the most critical cancer pathways: the phosphatidylinositol 3-kinase (PI3K)/AKT signaling pathways. Clinically, deregulation of PTEN function resulting in reduced PTEN expression and activity is implicated in human diseases. Cowden syndrome (CS) is an autosomal dominant disorder characterized by benign and malignant tumors. CS-related individual features occur commonly in the general population. Approximately 25% of patients diagnosed with CS have pathogenic germline PTEN mutations, which increase lifetime risks of breast, thyroid, uterine, renal and other cancers. PTEN testing and intensive cancer surveillance allow for early detection and treatment of these cancers for mutation positive patients and their relatives. In this review, we highlight our current knowledge of germline PTEN mutations in relation to human disease. We review current clinical diagnosis and management recommendations for PHTS including recent discoveries in understanding PTEN function regulation and how this can be exploited therapeutically.
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Affiliation(s)
- Joanne Ngeow
- Genomic Medicine Institute, Cleveland Clinic, Cleveland, OH 44195, USA; Division of Medical Oncology, National Cancer Centre, Singapore 169610, Singapore; Oncology Academic Clinical Program, Duke-NUS Graduate Medical School, Singapore 169610, Singapore
| | - Charis Eng
- Genomic Medicine Institute, Cleveland Clinic, Cleveland, OH 44195, USA; Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA; Taussig Cancer Institute, Cleveland Clinic, Cleveland, OH 44195, USA; CASE Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH 44106, USA; Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH 44106, USA.
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20
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Reyna C, Lee MC. Breast cancer in young women: special considerations in multidisciplinary care. J Multidiscip Healthc 2014; 7:419-29. [PMID: 25300196 PMCID: PMC4189712 DOI: 10.2147/jmdh.s49994] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Breast cancer is one of the most prevalent cancers in females, and 5%-7% of breast cancer cases occur in women under 40 years of age. Breast cancer in the young has gained increased attention with an attempt to improve diagnosis and prognosis. Young patients tend to have different epidemiology, presenting with later stages and more aggressive phenotypes. Diagnostic imaging is also more difficult in this age group. Multidisciplinary care generally encompasses surgeons, medical oncologists, radiation oncologists, radiologists, and social workers. Other special considerations include reconstruction options, fertility, genetics, and psychosocial issues. These concerns enlarge the already diverse multidisciplinary team to incorporate new expertise, such as reproductive specialists and genetic counselors. This review encompasses an overview of the current multimodal treatment regimens and the unique challenges in treating this special population. Integration of diagnosis, treatment, and quality of life issues should be addressed and understood by each member in the interdisciplinary team in order to optimize outcomes.
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Affiliation(s)
- Chantal Reyna
- Comprehensive Breast Program, H Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - Marie Catherine Lee
- Comprehensive Breast Program, H Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
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