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Chase A, Leung W, Tapper W, Jones AV, Knoops L, Rasi C, Forsberg LA, Guglielmelli P, Zoi K, Hall V, Chiecchio L, Eder-Azanza L, Bryant C, Lannfelt L, Docherty L, White HE, Score J, Mackay DJG, Vannucchi AM, Dumanski JP, Cross NCP. Profound parental bias associated with chromosome 14 acquired uniparental disomy indicates targeting of an imprinted locus. Leukemia 2015; 29:2069-74. [PMID: 26114957 PMCID: PMC4687469 DOI: 10.1038/leu.2015.130] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Accepted: 05/01/2015] [Indexed: 02/08/2023]
Abstract
Acquired uniparental disomy (aUPD) is a common finding in myeloid malignancies and typically acts to convert a somatically acquired heterozygous mutation to homozygosity. We sought to identify the target of chromosome 14 aUPD (aUPD14), a recurrent abnormality in myeloid neoplasms and population cohorts of elderly individuals. We identified 29 cases with aUPD14q that defined a minimal affected region (MAR) of 11.2 Mb running from 14q32.12 to the telomere. Exome sequencing (n=7) did not identify recurrently mutated genes, but methylation-specific PCR at the imprinted MEG3-DLK1 locus located within the MAR demonstrated loss of maternal chromosome 14 and gain of paternal chromosome 14 (P<0.0001), with the degree of methylation imbalance correlating with the level of aUPD (r=0.76; P=0.0001). The absence of driver gene mutations in the exomes of three individuals with aUPD14q but no known haematological disorder suggests that aUPD14q may be sufficient to drive clonal haemopoiesis. Analysis of cases with both aUPD14q and JAK2 V617F (n=11) indicated that aUPD14q may be an early event in some cases but a late event in others. We conclude that aUPD14q is a recurrent abnormality that targets an imprinted locus and may promote clonal haemopoiesis either as an initiating event or as a secondary change.
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Affiliation(s)
- A Chase
- Wessex Regional Genetics Laboratory, Salisbury NHS Foundation Trust, Salisbury District Hospital, Salisbury, UK.,Faculty of Medicine, University of Southampton, Southampton, UK
| | - W Leung
- Wessex Regional Genetics Laboratory, Salisbury NHS Foundation Trust, Salisbury District Hospital, Salisbury, UK.,Faculty of Medicine, University of Southampton, Southampton, UK
| | - W Tapper
- Faculty of Medicine, University of Southampton, Southampton, UK
| | - A V Jones
- Wessex Regional Genetics Laboratory, Salisbury NHS Foundation Trust, Salisbury District Hospital, Salisbury, UK.,Faculty of Medicine, University of Southampton, Southampton, UK
| | - L Knoops
- Hematology unit, Cliniques Universitaires Saint-Luc and de Duve Institute, Université Catholique de Louvain, Brussels, Belgium
| | - C Rasi
- Department of Immunology, Genetics and Pathology, Science for Life laboratory, Uppsala University, Uppsala, Sweden
| | - L A Forsberg
- Department of Immunology, Genetics and Pathology, Science for Life laboratory, Uppsala University, Uppsala, Sweden
| | - P Guglielmelli
- Laboratorio Congiunto MMPC, Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
| | - K Zoi
- Haematology Research Laboratory, Biomedical Research Foundation, Academy of Athens, Athens, Greece
| | - V Hall
- Wessex Regional Genetics Laboratory, Salisbury NHS Foundation Trust, Salisbury District Hospital, Salisbury, UK.,Faculty of Medicine, University of Southampton, Southampton, UK
| | - L Chiecchio
- Wessex Regional Genetics Laboratory, Salisbury NHS Foundation Trust, Salisbury District Hospital, Salisbury, UK
| | - L Eder-Azanza
- Wessex Regional Genetics Laboratory, Salisbury NHS Foundation Trust, Salisbury District Hospital, Salisbury, UK
| | - C Bryant
- Wessex Regional Genetics Laboratory, Salisbury NHS Foundation Trust, Salisbury District Hospital, Salisbury, UK.,Faculty of Medicine, University of Southampton, Southampton, UK
| | - L Lannfelt
- Department of Public Health and Caring Sciences, Uppsala University, Uppsala, Sweden
| | - L Docherty
- Wessex Regional Genetics Laboratory, Salisbury NHS Foundation Trust, Salisbury District Hospital, Salisbury, UK.,Faculty of Medicine, University of Southampton, Southampton, UK
| | - H E White
- Wessex Regional Genetics Laboratory, Salisbury NHS Foundation Trust, Salisbury District Hospital, Salisbury, UK.,Faculty of Medicine, University of Southampton, Southampton, UK
| | - J Score
- Wessex Regional Genetics Laboratory, Salisbury NHS Foundation Trust, Salisbury District Hospital, Salisbury, UK.,Faculty of Medicine, University of Southampton, Southampton, UK
| | - D J G Mackay
- Wessex Regional Genetics Laboratory, Salisbury NHS Foundation Trust, Salisbury District Hospital, Salisbury, UK.,Faculty of Medicine, University of Southampton, Southampton, UK
| | - A M Vannucchi
- Laboratorio Congiunto MMPC, Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
| | - J P Dumanski
- Department of Immunology, Genetics and Pathology, Science for Life laboratory, Uppsala University, Uppsala, Sweden
| | - N C P Cross
- Wessex Regional Genetics Laboratory, Salisbury NHS Foundation Trust, Salisbury District Hospital, Salisbury, UK.,Faculty of Medicine, University of Southampton, Southampton, UK
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Boonen SE, Mackay DJG, Hahnemann JMD, Docherty L, Grønskov K, Lehmann A, Larsen LG, Haemers AP, Kockaerts Y, Dooms L, Vu DC, Ngoc CTB, Nguyen PB, Kordonouri O, Sundberg F, Dayanikli P, Puthi V, Acerini C, Massoud AF, Tümer Z, Temple IK. Transient neonatal diabetes, ZFP57, and hypomethylation of multiple imprinted loci: a detailed follow-up. Diabetes Care 2013; 36:505-12. [PMID: 23150280 PMCID: PMC3579357 DOI: 10.2337/dc12-0700] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
OBJECTIVE Transient neonatal diabetes mellitus 1 (TNDM1) is the most common cause of diabetes presenting at birth. Approximately 5% of the cases are due to recessive ZFP57 mutations, causing hypomethylation at the TNDM locus and other imprinted loci (HIL). This has consequences for patient care because it has impact on the phenotype and recurrence risk for families. We have determined the genotype, phenotype, and epigenotype of the first 10 families to alert health professionals to this newly described genetic subgroup of diabetes. RESEARCH DESIGN AND METHODS The 10 families (14 homozygous/compound heterozygous individuals) with ZFP57 mutations were ascertained through TNDM1 diagnostic testing. ZFP57 was sequenced in probands and their relatives, and the methylation levels at multiple maternally and paternally imprinted loci were determined. Medical and family histories were obtained, and clinical examination was performed. RESULTS The key clinical features in probands were transient neonatal diabetes, intrauterine growth retardation, macroglossia, heart defects, and developmental delay. However, the finding of two homozygous relatives without diabetes and normal intelligence showed that the phenotype could be very variable. The epigenotype always included total loss of methylation at the TNDM1 locus and reproducible combinations of differential hypomethylation at other maternally imprinted loci, including tissue mosaicism. CONCLUSIONS There is yet no clear genotype-epigenotype-phenotype correlation to explain the variable clinical presentation, and this results in difficulties predicting the prognosis of affected individuals. However, many cases have a more severe phenotype than seen in other causes of TNDM1. Further cases and global epigenetic testing are needed to clarify this.
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Affiliation(s)
- Susanne E Boonen
- Center for Applied Human Molecular Genetics, The Kennedy Center, Glostrup, Denmark.
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Dugast E, Kiss-Toth E, Docherty L, Danger R, Chesneau M, Pichard V, Judor JP, Pettré S, Conchon S, Soulillou JP, Brouard S, Ashton-Chess J. Identification of tribbles-1 as a novel binding partner of Foxp3 in regulatory T cells. J Biol Chem 2013; 288:10051-10060. [PMID: 23417677 DOI: 10.1074/jbc.m112.448654] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
In a previous study, we identified TRIB1, a serine-threonine kinase-like molecule, as a biomarker of chronic antibody-mediated rejection of human kidneys when measured in peripheral blood mononuclear cells. Here, we focused our analysis on a specific subset of peripheral blood mononuclear cells that play a dominant role in regulating immune responses in health and disease, so-called CD4(+)CD25(+)Foxp3(+) regulatory T cells (Tregs). We isolated both human and murine Treg and non-Treg counterparts and analyzed TRIB1 and Foxp3 mRNA expression by quantitative PCR on the freshly isolated cells or following 24 h of activation. Physical interaction between the human TRIB1 and Foxp3 proteins was analyzed in live cell lines by protein complementation assay using both flow cytometry and microscopy and confirmed in primary freshly isolated human CD4(+)CD25(hi)CD127(-) Tregs by co-immunoprecipitation. Both TRIB1 and Foxp3 were expressed at significantly higher levels in Tregs than in their CD4(+)CD25(-) counterparts (p < 0.001). Moreover, TRIB1 and Foxp3 mRNA levels correlated tightly in Tregs (Spearman r = 1.0; p < 0.001, n = 7), but not in CD4(+)CD25(-) T cells. The protein complementation assay revealed a direct physical interaction between TRIB1 and Foxp3 in live cells. This interaction was impaired upon deletion of the TRIB1 N-terminal but not the C-terminal domain, suggesting an interaction in the nucleus. This direct interaction within the nucleus was confirmed in primary human Tregs by co-immunoprecipitation. These data show a direct relationship between TRIB1 and Foxp3 in terms of their expression and physical interaction and highlight Tribbles-1 as a novel binding partner of Foxp3 in Tregs.
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Affiliation(s)
- Emilie Dugast
- UMR1064, Institut National de la Santé et de la Recherche Médicale, Nantes 44000, France; Faculté de Médecine Université de Nantes, Nantes 44000, France; TcLand Expression, 21 rue de la Noue Bras de Fer, 44200 Nantes, France; Institut de Recherche en Transplantation, Institut de Transplantation Urologie-Néphrologie, Nantes 44000, France
| | - Endre Kiss-Toth
- Department of Cardiovascular Science, University of Sheffield, Sheffield S10 2TN, United Kingdom
| | - Louise Docherty
- Department of Cardiovascular Science, University of Sheffield, Sheffield S10 2TN, United Kingdom
| | - Richard Danger
- UMR1064, Institut National de la Santé et de la Recherche Médicale, Nantes 44000, France; Faculté de Médecine Université de Nantes, Nantes 44000, France; Institut de Recherche en Transplantation, Institut de Transplantation Urologie-Néphrologie, Nantes 44000, France
| | - Mélanie Chesneau
- UMR1064, Institut National de la Santé et de la Recherche Médicale, Nantes 44000, France; Faculté de Médecine Université de Nantes, Nantes 44000, France; Institut de Recherche en Transplantation, Institut de Transplantation Urologie-Néphrologie, Nantes 44000, France
| | - Virginie Pichard
- UMR1064, Institut National de la Santé et de la Recherche Médicale, Nantes 44000, France; Faculté de Médecine Université de Nantes, Nantes 44000, France; Institut de Recherche en Transplantation, Institut de Transplantation Urologie-Néphrologie, Nantes 44000, France
| | - Jean-Paul Judor
- UMR1064, Institut National de la Santé et de la Recherche Médicale, Nantes 44000, France; Faculté de Médecine Université de Nantes, Nantes 44000, France; Institut de Recherche en Transplantation, Institut de Transplantation Urologie-Néphrologie, Nantes 44000, France
| | - Ségolène Pettré
- UMR1064, Institut National de la Santé et de la Recherche Médicale, Nantes 44000, France; Faculté de Médecine Université de Nantes, Nantes 44000, France; Institut de Recherche en Transplantation, Institut de Transplantation Urologie-Néphrologie, Nantes 44000, France
| | - Sophie Conchon
- UMR1064, Institut National de la Santé et de la Recherche Médicale, Nantes 44000, France; Faculté de Médecine Université de Nantes, Nantes 44000, France; Institut de Recherche en Transplantation, Institut de Transplantation Urologie-Néphrologie, Nantes 44000, France
| | - Jean-Paul Soulillou
- UMR1064, Institut National de la Santé et de la Recherche Médicale, Nantes 44000, France; Institut de Recherche en Transplantation, Institut de Transplantation Urologie-Néphrologie, Nantes 44000, France; Centre Hospitalier Universitaire de Nantes, Nantes 44000, France
| | - Sophie Brouard
- UMR1064, Institut National de la Santé et de la Recherche Médicale, Nantes 44000, France; Institut de Recherche en Transplantation, Institut de Transplantation Urologie-Néphrologie, Nantes 44000, France; Centre Hospitalier Universitaire de Nantes, Nantes 44000, France.
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Ashrafian H, Docherty L, Leo V, Towlson C, Neilan M, Steeples V, Lygate CA, Hough T, Townsend S, Williams D, Wells S, Norris D, Glyn-Jones S, Land J, Barbaric I, Lalanne Z, Denny P, Szumska D, Bhattacharya S, Griffin JL, Hargreaves I, Fernandez-Fuentes N, Cheeseman M, Watkins H, Dear TN. A mutation in the mitochondrial fission gene Dnm1l leads to cardiomyopathy. PLoS Genet 2010; 6:e1001000. [PMID: 20585624 PMCID: PMC2891719 DOI: 10.1371/journal.pgen.1001000] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2009] [Accepted: 05/25/2010] [Indexed: 12/03/2022] Open
Abstract
Mutations in a number of genes have been linked to inherited dilated cardiomyopathy (DCM). However, such mutations account for only a small proportion of the clinical cases emphasising the need for alternative discovery approaches to uncovering novel pathogenic mutations in hitherto unidentified pathways. Accordingly, as part of a large-scale N-ethyl-N-nitrosourea mutagenesis screen, we identified a mouse mutant, Python, which develops DCM. We demonstrate that the Python phenotype is attributable to a dominant fully penetrant mutation in the dynamin-1-like (Dnm1l) gene, which has been shown to be critical for mitochondrial fission. The C452F mutation is in a highly conserved region of the M domain of Dnm1l that alters protein interactions in a yeast two-hybrid system, suggesting that the mutation might alter intramolecular interactions within the Dnm1l monomer. Heterozygous Python fibroblasts exhibit abnormal mitochondria and peroxisomes. Homozygosity for the mutation results in the death of embryos midway though gestation. Heterozygous Python hearts show reduced levels of mitochondria enzyme complexes and suffer from cardiac ATP depletion. The resulting energy deficiency may contribute to cardiomyopathy. This is the first demonstration that a defect in a gene involved in mitochondrial remodelling can result in cardiomyopathy, showing that the function of this gene is needed for the maintenance of normal cellular function in a relatively tissue-specific manner. This disease model attests to the importance of mitochondrial remodelling in the heart; similar defects might underlie human heart muscle disease. Heart disease is very common. Some cases of heart disease are strongly influenced by lifestyle and diet, whereas others have a strong genetic component. A certain form of heart failure, known as dilated cardiomyopathy (DCM) quite often runs in families suggesting that a defective gene or genes underlie this disease. We describe a new mouse mutant called “Python” which suffers from a heart disease similar to DCM. We were able to pinpoint the defective gene responsible for the disease. This gene is normally involved in the division of mitochondria, the “power plants” of the cell that generate one of the main energy supplies for the cell. This is a unique model that implicates a new gene and mechanism of disease for further investigation.
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MESH Headings
- Amino Acid Sequence
- Animals
- Base Sequence
- Cardiomyopathy, Dilated/congenital
- Cardiomyopathy, Dilated/genetics
- Cardiomyopathy, Dilated/metabolism
- Cardiomyopathy, Dilated/pathology
- Dynamins
- Embryo, Mammalian/metabolism
- Embryo, Mammalian/pathology
- GTP Phosphohydrolases/chemistry
- GTP Phosphohydrolases/genetics
- GTP Phosphohydrolases/metabolism
- Genes, Mitochondrial
- Genetic Predisposition to Disease
- Male
- Mice
- Mice, Inbred BALB C
- Microscopy, Electron, Transmission
- Microtubule-Associated Proteins/chemistry
- Microtubule-Associated Proteins/genetics
- Microtubule-Associated Proteins/metabolism
- Models, Molecular
- Molecular Sequence Data
- Mutation
- Protein Structure, Quaternary
- Sequence Alignment
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Affiliation(s)
- Houman Ashrafian
- Department of Cardiovascular Medicine and Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Louise Docherty
- Mammalian Genetics of Disease Unit, School of Medicine, University of Sheffield, Sheffield, United Kingdom
| | - Vincenzo Leo
- Leeds Institute of Molecular Medicine, Wellcome Trust Brenner Building, St. James's University Hospital, Leeds, United Kingdom
| | - Christopher Towlson
- Mammalian Genetics of Disease Unit, School of Medicine, University of Sheffield, Sheffield, United Kingdom
| | - Monica Neilan
- Mammalian Genetics of Disease Unit, School of Medicine, University of Sheffield, Sheffield, United Kingdom
| | - Violetta Steeples
- Department of Cardiovascular Medicine and Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Craig A. Lygate
- Department of Cardiovascular Medicine and Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Tertius Hough
- Leeds Institute of Molecular Medicine, Wellcome Trust Brenner Building, St. James's University Hospital, Leeds, United Kingdom
| | - Stuart Townsend
- Leeds Institute of Molecular Medicine, Wellcome Trust Brenner Building, St. James's University Hospital, Leeds, United Kingdom
| | - Debbie Williams
- Mary Lyon Centre and Mammalian Genetics Unit, Medical Research Council, Harwell, United Kingdom
| | - Sara Wells
- Mary Lyon Centre and Mammalian Genetics Unit, Medical Research Council, Harwell, United Kingdom
| | - Dominic Norris
- Mary Lyon Centre and Mammalian Genetics Unit, Medical Research Council, Harwell, United Kingdom
| | - Sarah Glyn-Jones
- Department of Biochemistry, University of Cambridge, Cambridge, United Kingdom
| | - John Land
- Neurometabolic Unit, National Hospital, London, United Kingdom
| | - Ivana Barbaric
- Department of Biomedical Science, University of Sheffield, Sheffield, United Kingdom
| | - Zuzanne Lalanne
- Mary Lyon Centre and Mammalian Genetics Unit, Medical Research Council, Harwell, United Kingdom
| | - Paul Denny
- Mary Lyon Centre and Mammalian Genetics Unit, Medical Research Council, Harwell, United Kingdom
| | - Dorota Szumska
- Department of Cardiovascular Medicine and Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Shoumo Bhattacharya
- Department of Cardiovascular Medicine and Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Julian L. Griffin
- Department of Biochemistry, University of Cambridge, Cambridge, United Kingdom
| | - Iain Hargreaves
- Neurometabolic Unit, National Hospital, London, United Kingdom
| | - Narcis Fernandez-Fuentes
- Leeds Institute of Molecular Medicine, Wellcome Trust Brenner Building, St. James's University Hospital, Leeds, United Kingdom
| | - Michael Cheeseman
- Mary Lyon Centre and Mammalian Genetics Unit, Medical Research Council, Harwell, United Kingdom
| | - Hugh Watkins
- Department of Cardiovascular Medicine and Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - T. Neil Dear
- Mammalian Genetics of Disease Unit, School of Medicine, University of Sheffield, Sheffield, United Kingdom
- Leeds Institute of Molecular Medicine, Wellcome Trust Brenner Building, St. James's University Hospital, Leeds, United Kingdom
- Mary Lyon Centre and Mammalian Genetics Unit, Medical Research Council, Harwell, United Kingdom
- * E-mail:
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Docherty L, Adams MR, Patel P, McFadden J. The magnetic immuno-polymerase chain reaction assay for the detection of Campylobacter in milk and poultry. Lett Appl Microbiol 1996; 22:288-92. [PMID: 8934788 DOI: 10.1111/j.1472-765x.1996.tb01163.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
A rapid and sensitive technique, based on the magnetic immuno-polymerase chain reaction assay (MIPA), was developed for the detection of Campylobacter jejuni in milk and chicken products. Target bacteria are captured from the food sample by magnetic particles coated with a specific antibody and the bound bacteria then lysed and subjected to PCR. The MIPA could detect 420 cfu g-1 of chicken after 18 h, 42 cfu g-1 after 24 h, and 4.2 cfu g-1 after 36 h enrichment. For artificially contaminated milk 63 cfu ml-1 could be detected after 18 and 24 h and 6.3 cfu ml-1 after 36 h enrichment.
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Affiliation(s)
- L Docherty
- School of Biological Sciences, University of Surrey, Guildford, UK.
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