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Klementieva N, Goliusova D, Krupinova J, Yanvarev V, Panova A, Mokrysheva N, Kiselev SL. A Novel Isogenic Human Cell-Based System for MEN1 Syndrome Generated by CRISPR/Cas9 Genome Editing. Int J Mol Sci 2021; 22:ijms222112054. [PMID: 34769484 PMCID: PMC8584395 DOI: 10.3390/ijms222112054] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Revised: 10/27/2021] [Accepted: 11/04/2021] [Indexed: 02/07/2023] Open
Abstract
Multiple endocrine neoplasia type 1 (MEN1) is a rare tumor syndrome that manifests differently among various patients. Despite the mutations in the MEN1 gene that commonly predispose tumor development, there are no obvious phenotype-genotype correlations. The existing animal and in vitro models do not allow for studies of the molecular genetics of the disease in a human-specific context. We aimed to create a new human cell-based model, which would consider the variability in genetic or environmental factors that cause the complexity of MEN1 syndrome. Here, we generated patient-specific induced pluripotent stem cell lines carrying the mutation c.1252G>T, D418Y in the MEN1 gene. To reduce the genetically determined variability of the existing cellular models, we created an isogenic cell system by modifying the target allele through CRISPR/Cas9 editing with great specificity and efficiency. The high potential of these cell lines to differentiate into the endodermal lineage in defined conditions ensures the next steps in the development of more specialized cells that are commonly affected in MEN1 patients, such as parathyroid or pancreatic islet cells. We anticipate that this isogenic system will be broadly useful to comprehensively study MEN1 gene function across different contexts, including in vitro modeling of MEN1 syndrome.
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Affiliation(s)
- Natalia Klementieva
- Endocrinology Research Centre, 115478 Moscow, Russia; (J.K.); (A.P.); (N.M.)
- Correspondence: (N.K.); (S.L.K.)
| | - Daria Goliusova
- Vavilov Institute of General Genetics, Russian Academy of Sciences, 119991 Moscow, Russia; (D.G.); (V.Y.)
| | - Julia Krupinova
- Endocrinology Research Centre, 115478 Moscow, Russia; (J.K.); (A.P.); (N.M.)
| | - Vladislav Yanvarev
- Vavilov Institute of General Genetics, Russian Academy of Sciences, 119991 Moscow, Russia; (D.G.); (V.Y.)
| | - Alexandra Panova
- Endocrinology Research Centre, 115478 Moscow, Russia; (J.K.); (A.P.); (N.M.)
- Vavilov Institute of General Genetics, Russian Academy of Sciences, 119991 Moscow, Russia; (D.G.); (V.Y.)
| | - Natalia Mokrysheva
- Endocrinology Research Centre, 115478 Moscow, Russia; (J.K.); (A.P.); (N.M.)
| | - Sergey L. Kiselev
- Endocrinology Research Centre, 115478 Moscow, Russia; (J.K.); (A.P.); (N.M.)
- Vavilov Institute of General Genetics, Russian Academy of Sciences, 119991 Moscow, Russia; (D.G.); (V.Y.)
- Correspondence: (N.K.); (S.L.K.)
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A novel MEN1 pathogenic variant in an Italian patient with multiple endocrine neoplasia type 1. Mol Biol Rep 2020; 47:7313-7316. [PMID: 32808116 PMCID: PMC7430936 DOI: 10.1007/s11033-020-05730-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Revised: 08/04/2020] [Accepted: 08/13/2020] [Indexed: 10/25/2022]
Abstract
The multiple endocrine neoplasia type 1 (MEN1) is a rare syndrome characterized by the predisposition to developing multiple endocrine and non-endocrine tumors, typically characterized by the association between parathyroid gland hyperplasia or tumors, gastroenteropancreatic tumors and pituitary adenomas. The MEN1 gene is located on the long arm of chromosome 11 (11q13) and it encodes for the protein "menin". We here reported the case of a MEN1-patient, affected by primary hyperparathyroidism, insulinoma, pituitary non-hyperfunctioning adenoma and bilateral adrenal masses, carrying a novel heterozygous pathogenic variant (c.1252_1254delGACinsAT), located in exon 9 of MEN1 gene.
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Carvalho RA, Urtremari B, Jorge AAL, Santana LS, Quedas EPS, Sekiya T, Longuini VC, Montenegro FLM, Lerario AM, Toledo SPA, Marx SJ, Toledo RA, Lourenço DM. Germline mutation landscape of multiple endocrine neoplasia type 1 using full gene next-generation sequencing. Eur J Endocrinol 2018; 179:391-407. [PMID: 30324798 DOI: 10.1530/eje-18-0430] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2018] [Accepted: 09/24/2018] [Indexed: 12/17/2022]
Abstract
Background Loss-of-function germline MEN1 gene mutations account for 75-95% of patients with multiple endocrine neoplasia type 1 (MEN1). It has been postulated that mutations in non-coding regions of MEN1 might occur in some of the remaining patients; however, this hypothesis has not yet been fully investigated. Objective To sequence for the entire MEN1 including promoter, exons and introns in a large MEN1 cohort and determine the mutation profile. Methods and patients A target next-generation sequencing (tNGS) assay comprising 7.2 kb of the full MEN1 was developed to investigate germline mutations in 76 unrelated MEN1 probands (49 familial, 27 sporadic). tNGS results were validated by Sanger sequencing (SS), and multiplex ligation-dependent probe amplification (MLPA) assay was applied when no mutations were identifiable by both tNGS and SS. Results Germline MEN1 variants were verified in coding region and splicing sites of 57/76 patients (74%) by both tNGS and SS (100% reproducibility). Thirty-eight different pathogenic or likely pathogenic variants were identified, including 13 new and six recurrent variants. Three large deletions were detected by MLPA only. No mutation was detected in 16 patients. In untranslated, regulatory or in deep intronic MEN1 regions of the 76 MEN1 cases, no point or short indel pathogenic variants were found in untranslated, although 33 benign/likely benign and three new VUS variants were detected. Conclusions Our study documents that point or short indel mutations in non-coding regions of MEN1 are very rare events. Also, tNGS proved to be a highly effective technology for routine genetic MEN1 testing.
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Affiliation(s)
- Rafael A Carvalho
- Unidade de Endocrinologia Genetica UEG, Laboratorio de Endocrinologia Celular e Molecular LIM-25, Disciplina de Endocrinologia
| | - Betsaida Urtremari
- Unidade de Endocrinologia Genetica UEG, Laboratorio de Endocrinologia Celular e Molecular LIM-25, Disciplina de Endocrinologia
| | - Alexander A L Jorge
- Unidade de Endocrinologia Genetica UEG, Laboratorio de Endocrinologia Celular e Molecular LIM-25, Disciplina de Endocrinologia
| | - Lucas S Santana
- Unidade de Endocrinologia Genetica UEG, Laboratorio de Endocrinologia Celular e Molecular LIM-25, Disciplina de Endocrinologia
| | - Elisangela P S Quedas
- Unidade de Endocrinologia Genetica UEG, Laboratorio de Endocrinologia Celular e Molecular LIM-25, Disciplina de Endocrinologia
| | - Tomoko Sekiya
- Unidade de Endocrinologia Genetica UEG, Laboratorio de Endocrinologia Celular e Molecular LIM-25, Disciplina de Endocrinologia
| | - Viviane C Longuini
- Unidade de Endocrinologia Genetica UEG, Laboratorio de Endocrinologia Celular e Molecular LIM-25, Disciplina de Endocrinologia
| | - Fabio L M Montenegro
- Unidade de Paratireoide, Laboratorio de Cirurgia Vascular e da Cabeça e Pescoço LIM-28, Disciplina de Cirurgia de Cabeça e Pescoço, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Sao Paulo, Brazil
| | - Antonio M Lerario
- Division of Metabolism, Department of Internal Medicine, Endocrinology and Diabetes, University of Michigan, Ann Arbor, Michigan, USA
| | - Sergio P A Toledo
- Unidade de Endocrinologia Genetica UEG, Laboratorio de Endocrinologia Celular e Molecular LIM-25, Disciplina de Endocrinologia
- Endocrinology Division, Federal University of Sao Paulo (UNIFESP), São Paulo, Brazil
| | - Stephen J Marx
- Unidade de Endocrinologia Genetica UEG, Laboratorio de Endocrinologia Celular e Molecular LIM-25, Disciplina de Endocrinologia
- Endocrinology, Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD), Bethesda, Maryland, USA
| | | | - Delmar M Lourenço
- Unidade de Endocrinologia Genetica UEG, Laboratorio de Endocrinologia Celular e Molecular LIM-25, Disciplina de Endocrinologia
- Disciplina de Endocrinologia, Instituto do Cancer do Estado de Sao Paulo ICESP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Sao Paulo, Brazil
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Han B, Song ZY, Wu JJ, Liu W, Liu BL, Ye XP, Chen X, Pan CM, Xu HY, Li L, Zhu H, Lu YL, Wu WL, Chen MD, Song HD, Qiao J. A novel intronic mutation and a missense mutation of MEN1 identified in two Chinese families with multiple endocrine neoplasia type 1. J Endocrinol Invest 2013; 36:162-7. [PMID: 22522645 DOI: 10.3275/8336] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
BACKGROUND Multiple endocrine neoplasia type 1 (MEN1) caused by MEN1 mutation is widely recognized. To date, 14 novel mutations were reported in Chinese and intronic mutations are getting more attention. AIM To explore clinical features and MEN1 mutations in two Chinese families suffering from MEN1. METHODS Nineteen individuals (10 males and 9 females) from two unrelated families with MEN1 were studied. Mutations of MEN1 were analyzed by direct sequencing of PCR products. In vitro splicing analysis was also performed with minigenes containing both wildtype and novel mutant fragments. Through the RNAstructure program, we analyzed the secondary structure of the wild type MEN1 pre-mRNA and then introduced T>G mutation at +2 donor splice site of intron 7. RESULTS Clinical features of 3 patients in two families were described, and 5 individuals were proven to be carriers of MEN1 mutation without apparent symptoms. A novel splicing site mutation of the intron 7 (IVS7+2 T→G) was identified in the first family. In vitro analysis also verified this mutation caused the aberrant splicing of MEN1 mRNA. With the RNAstructure program, we could figure out that the global secondary structure as well as the number of stems and loops of pre-mRNA greatly changed after this mutation. The mutation c. 1227 C>A (C409X) was identified in another family, which also caused the truncation of menin. CONCLUSION We reported a novel intronic mutation and a missense mutations in two Chinese families suffering from MEN1.
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Affiliation(s)
- B Han
- Department of Endocrinology, Shanghai Ninth People's Hospital, Shanghai, China
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Nagamura Y, Yamazaki M, Shimazu S, Tsukada T, Sakurai A. Application of an intracellular stability test of a novel missense menin mutant to the diagnosis of multiple endocrine neoplasia type 1. Endocr J 2012; 59:1093-8. [PMID: 22878668 DOI: 10.1507/endocrj.ej12-0145] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Germline MEN1 mutation analysis is a powerful tool for an early diagnosis of multiple endocrine neoplasia type 1 (MEN1), an autosomal dominant familial cancer syndrome characterized by the parathyroid, pituitary and gastroenteropancreatic endocrine tumors. However, the clinical significance of MEN1 gene variants, especially missense and in-frame mutations as well as some splicing mutations, is not always obvious. We have previously shown that mutant menin proteins associated with MEN1 are rapidly degraded by the ubiquitin-proteasome pathway. We also demonstrated by a fluorescent immunocytochemical stability test that the stability of missense and in-frame deletion mutants varies widely but that unstable mutants were found only in MEN1 and related disorders and not in normal polymorphisms. In the present study, we evaluated by this stability test the pathogenicity of a novel MEN1 missense mutation, c.1118C>T, encoding a P373L mutant menin, identified in a suspected MEN1 patient. The results demonstrated that the mutant menin is highly unstable, indicating that this mutation is causative for MEN1. These findings encouraged us to proceed with presymptomatic genetic screening for this mutation among the family members, which resulted in the identification of asymptomatic mutation carriers. Thus, the information from the menin stability test was useful for genetic diagnosis and counseling of MEN1 in the case with a previously unreported MEN1 missense mutation.
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Affiliation(s)
- Yuko Nagamura
- Division of Familial Cancer Research, National Cancer Center Research Institute, Tokyo, Japan
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Chen JM, Férec C, Cooper DN. Closely spaced multiple mutations as potential signatures of transient hypermutability in human genes. Hum Mutat 2009; 30:1435-48. [PMID: 19685533 DOI: 10.1002/humu.21088] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Data from diverse organisms suggests that transient hypermutability is a general mutational mechanism with the potential to generate multiple synchronous mutations, a phenomenon probably best exemplified by closely spaced multiple mutations (CSMMs). Here we have attempted to extend the concept of transient hypermutability from somatic cells to the germline, using human inherited disease-causing multiple mutations as a model system. Employing stringent criteria for data inclusion, we have retrospectively identified numerous potential examples of pathogenic CSMMs that exhibit marked similarities to the CSMMs reported in other systems. These examples include (1) eight multiple mutations, each comprising three or more components within a sequence tract of <100 bp; (2) three possible instances of "mutation showers"; and (3) numerous highly informative "homocoordinate" mutations. Using the proportion of CpG substitution as a crude indicator of the relative likelihood of transient hypermutability, we present evidence to suggest that CSMMs comprising at least one pair of mutations separated by < or =100 bp may constitute signatures of transient hypermutability in human genes. Although this analysis extends the generality of the concept of transient hypermutability and provides new insights into what may be considered a novel mechanism of mutagenesis underlying human inherited disease, it has raised serious concerns regarding current practices in mutation screening.
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Affiliation(s)
- Jian-Min Chen
- Institut National de la Santé et de la Recherche Médicale, U613, Brest, France.
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