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Your search keyword '"Flaman, Jean-Michel"' showing total 4 results
Start Over Author "Flaman, Jean-Michel" Topic dna copy number variations
4 results on '"Flaman, Jean-Michel"'

1. Germline copy number variation of genes involved in chromatin remodelling in families suggestive of Li-Fraumeni syndrome with brain tumours.

Author

Aury-Landas J, Bougeard G, Castel H, Hernandez-Vargas H, Drouet A, Latouche JB, Schouft MT, Férec C, Leroux D, Lasset C, Coupier I, Caron O, Herceg Z, Frebourg T, and Flaman JM

Subjects
Acetylation, Adolescent, Apoptosis genetics, Cell Cycle genetics, Cell Line, Tumor, DNA Methylation genetics, Female, Humans, Male, Sirtuin 3 genetics, Brain Neoplasms genetics, Chromatin genetics, DNA Copy Number Variations genetics, Germ-Line Mutation genetics, Li-Fraumeni Syndrome genetics, Tumor Suppressor Protein p53 genetics
Abstract

Germline alterations of the tumour suppressor TP53 gene are detected approximately in 25% of the families suggestive of Li-Fraumeni syndrome (LFS), characterised by a genetic predisposition to a wide tumour spectrum, including soft-tissue sarcomas, osteosarcomas, premenopausal breast cancers, brain tumours, adrenocortical tumours, plexus choroid tumours, leukaemia and lung cancer. The aim of this study was to determine the contribution of germline copy number variations (CNVs) to LFS in families without detectable TP53 mutation. Using a custom-designed high-resolution array CGH, we evaluated the presence of rare germline CNVs in 64 patients fulfilling the Chompret criteria for LFS, but without any detectable TP53 alteration. In 15 unrelated patients, we detected 20 new CNVs absent in 600 controls. Remarkably, in four patients who had developed each brain tumour, the detected CNV overlap the KDM1A, MTA3, TRRAP or SIRT3 genes encoding p53 partners involved in histone methylation or acetylation. Focused analysis of SIRT3 showed that the CNV encompassing SIRT3 leads to SIRT3 overexpression, and that in vitro SIRT3 overexpression prevents apoptosis, increases G2/M and results in a hypermethylation of numerous genes. This study supports the causal role of germline alterations of genes involved in chromatin remodelling in genetic predisposition to cancer and, in particular, to brain tumours.

Published
2013
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2. A genome-wide study reveals rare CNVs exclusive to extreme phenotypes of Alzheimer disease.

Author

Rovelet-Lecrux A, Legallic S, Wallon D, Flaman JM, Martinaud O, Bombois S, Rollin-Sillaire A, Michon A, Le Ber I, Pariente J, Puel M, Paquet C, Croisile B, Thomas-Antérion C, Vercelletto M, Lévy R, Frébourg T, Hannequin D, and Campion D

Subjects
Age of Onset, Aged, Aged, 80 and over, Amyloid beta-Protein Precursor genetics, Amyloid beta-Protein Precursor metabolism, Female, Humans, Male, Middle Aged, Mutation, Alzheimer Disease genetics, DNA Copy Number Variations, Genome-Wide Association Study, Phenotype
Abstract

Studying rare extreme forms of Alzheimer disease (AD) may prove to be a useful strategy in identifying new genes involved in monogenic determinism of AD. Amyloid precursor protein (APP), PSEN1, and PSEN2 mutations account for only 85% of autosomal dominant early-onset AD (ADEOAD) families. We hypothesised that rare copy number variants (CNVs) could be involved in ADEOAD families without mutations in known genes, as well as in rare sporadic young-onset AD cases. Using high-resolution array comparative genomic hybridisation, we assessed the presence of rare CNVs in 21 unrelated ADEOAD cases, having no alteration on known genes, and 12 sporadic AD cases, with an age of onset younger than 55 years. The analysis revealed the presence of 7 singleton CNVs (4 in ADEOAD and 3 in sporadic cases) absent in 1078 controls and 912 late-onset AD cases. Strikingly, 4 out of 7 rearrangements target genes (KLK6, SLC30A3, MEOX2, and FPR2) encoding proteins that are tightly related to amyloid-β peptide metabolism or signalling. Although these variants are individually rare and restricted to particular subgroups of patients, these findings support the causal role, in human pathology, of a set of genes coding for molecules suspected for a long time to modify Aβ metabolism or signalling, and for which animal or cellular models have already been developed.

Published
2012
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3. Pitfalls in the use of DGV for CNV interpretation.

Author

Duclos A, Charbonnier F, Chambon P, Latouche JB, Blavier A, Redon R, Frébourg T, and Flaman JM

Subjects
Colorectal Neoplasms, Hereditary Nonpolyposis genetics, Humans, Research Design, Comparative Genomic Hybridization methods, DNA Copy Number Variations genetics, Databases, Genetic, Genetics, Medical methods, Genomic Structural Variation genetics
Published
2011
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4. A genome-wide study reveals rare CNVs exclusive to extreme phenotypes of Alzheimer disease

Author

Rovelet-Lecrux, Anne, Legallic, Solenn, Wallon, David, Flaman, Jean-Michel, Martinaud, Olivier, Bombois, Stéphanie, Rollin-Sillaire, Adeline, Michon, Agnès, Le Ber, Isabelle, Pariente, Jérémie, Puel, Michèle, Paquet, Claire, Croisile, Bernard, Thomas-Antérion, Catherine, Vercelletto, Martine, Lévy, Richard, Frébourg, Thierry, Hannequin, Didier, Campion, Dominique, Renseigné, Non, Moreaud, Olivier, Service de neurologie [Rouen], CHU Rouen, Normandie Université (NU)-Normandie Université (NU), Génétique médicale et fonctionnelle du cancer et des maladies neuropsychiatriques, Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM), Normandie Université (NU), Centre de Recherche Jean-Pierre AUBERT Neurosciences et Cancer - U837 (JPArc), Université Lille Nord de France (COMUE)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Lille, Centre de Recherche de l'Institut du Cerveau et de la Moelle épinière (CRICM), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Imagerie cérébrale et handicaps neurologiques (ICHN), Institut des sciences du cerveau de Toulouse. (ISCT), Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre Hospitalier Universitaire de Toulouse (CHU Toulouse)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Centre Hospitalier Universitaire de Toulouse (CHU Toulouse)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Neurologie générale et maladies inflammatoires du système nerveux [Toulouse], Centre Hospitalier Universitaire de Toulouse (CHU Toulouse), Institut du Fer à Moulin, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM), Département de Neurologie, Hopital Neurologique, Bron, Centre de Mémoire de Ressource et Recherche (CMRR), Centre Hospitalier Universitaire de Saint-Etienne [CHU Saint-Etienne] (CHU ST-E), Service de neurologie [Nantes], Université de Nantes (UN)-Centre hospitalier universitaire de Nantes (CHU Nantes)-Hôpital Guillaume-et-René-Laennec [Saint-Herblain], Neuro-anatomie fonctionnelle du comportement et de ses troubles, Université Pierre et Marie Curie - Paris 6 (UPMC)-IFR70-Institut National de la Santé et de la Recherche Médicale (INSERM), Génétique du cancer et des maladies neuropsychiatriques (GMFC), Normandie Université (NU)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Laboratoire de Psychologie et NeuroCognition (LPNC), Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Unité de Neuropsychologie, CHU Grenoble, Centre de Recherche Jean-Pierre AUBERT Neurosciences et Cancer - U1172 Inserm - U837 (JPArc), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Lille Nord de France (COMUE)-Université de Lille, Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Pierre et Marie Curie - Paris 6 (UPMC), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-CHU Toulouse [Toulouse]-Hôpital Purpan [Toulouse], CHU Toulouse [Toulouse], CHU Saint-Etienne-Hôpital Bellevue, Institut National de la Santé et de la Recherche Médicale (INSERM)-IFR70-Université Pierre et Marie Curie - Paris 6 (UPMC), and Centre National de la Recherche Scientifique (CNRS)-Université Pierre Mendès France - Grenoble 2 (UPMF)-Université Joseph Fourier - Grenoble 1 (UJF)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])

Subjects
Male, MESH: Mutation, DNA Copy Number Variations, MESH: Age of Onset, Genome-wide association study, Biology, medicine.disease_cause, MESH: Phenotype, Genome, Article, 03 medical and health sciences, Amyloid beta-Protein Precursor, 0302 clinical medicine, MESH: Aged, 80 and over, Alzheimer Disease, MESH: Amyloid beta-Protein Precursor, PSEN2, Genetics, medicine, PSEN1, Humans, Copy-number variation, Age of Onset, Genetics (clinical), 030304 developmental biology, Aged, Aged, 80 and over, MESH: Aged, 0303 health sciences, Mutation, MESH: Middle Aged, MESH: Humans, Middle Aged, medicine.disease, Phenotype, MESH: Male, 3. Good health, MESH: Genome-Wide Association Study, Female, MESH: DNA Copy Number Variations, [SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], Alzheimer's disease, MESH: Female, 030217 neurology & neurosurgery, MESH: Alzheimer Disease, Genome-Wide Association Study
Abstract

International audience; Studying rare extreme forms of Alzheimer disease (AD) may prove to be a useful strategy in identifying new genes involved in monogenic determinism of AD. Amyloid precursor protein (APP), PSEN1, and PSEN2 mutations account for only 85% of autosomal dominant early-onset AD (ADEOAD) families. We hypothesised that rare copy number variants (CNVs) could be involved in ADEOAD families without mutations in known genes, as well as in rare sporadic young-onset AD cases. Using high-resolution array comparative genomic hybridisation, we assessed the presence of rare CNVs in 21 unrelated ADEOAD cases, having no alteration on known genes, and 12 sporadic AD cases, with an age of onset younger than 55 years. The analysis revealed the presence of 7 singleton CNVs (4 in ADEOAD and 3 in sporadic cases) absent in 1078 controls and 912 late-onset AD cases. Strikingly, 4 out of 7 rearrangements target genes (KLK6, SLC30A3, MEOX2, and FPR2) encoding proteins that are tightly related to amyloid-β peptide metabolism or signalling. Although these variants are individually rare and restricted to particular subgroups of patients, these findings support the causal role, in human pathology, of a set of genes coding for molecules suspected for a long time to modify Aβ metabolism or signalling, and for which animal or cellular models have already been developed.

Published
2012
Full Text
View/download PDF

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