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Guillas I, Lhomme M, Pionneau C, Matheron L, Ponnaiah M, Galier S, Lebreton S, Delbos M, Ma F, Darabi M, Khoury PE, Abifadel M, Couvert P, Giral P, Lesnik P, Guerin M, Le Goff W, Kontush A. Identification of the specific molecular and functional signatures of pre-beta-HDL: relevance to cardiovascular disease. Basic Res Cardiol 2023; 118:33. [PMID: 37639039 DOI: 10.1007/s00395-023-01004-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 07/26/2023] [Accepted: 08/14/2023] [Indexed: 08/29/2023]
Abstract
While low concentrations of high-density lipoprotein-cholesterol (HDL-C) are widely accepted as an independent cardiovascular risk factor, HDL-C-rising therapies largely failed, suggesting the importance of both HDL functions and individual subspecies. Indeed HDL particles are highly heterogeneous, with small, dense pre-beta-HDLs being considered highly biologically active but remaining poorly studied, largely reflecting difficulties for their purification. We developed an original experimental approach allowing the isolation of sufficient amounts of human pre-beta-HDLs and revealing the specificity of their proteomic and lipidomic profiles and biological activities. Pre-beta-HDLs were enriched in highly poly-unsaturated species of phosphatidic acid and phosphatidylserine, and in an unexpectedly high number of proteins implicated in the inflammatory response, including serum paraoxonase/arylesterase-1, vitronectin and clusterin, as well as in complement regulation and immunity, including haptoglobin-related protein, complement proteins and those of the immunoglobulin class. Interestingly, amongst proteins associated with lipid metabolism, phospholipid transfer protein, cholesteryl ester transfer protein and lecithin:cholesterol acyltransferase were strongly enriched in, or restricted to, pre-beta-HDL. Furthermore, pre-beta-HDL potently mediated cellular cholesterol efflux and displayed strong anti-inflammatory activities. A correlational network analysis between lipidome, proteome and biological activities highlighted 15 individual lipid and protein components of pre-beta-HDL relevant to cardiovascular disease, which may constitute novel diagnostic targets in a pathological context of altered lipoprotein metabolism.
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Affiliation(s)
- Isabelle Guillas
- Inserm, Institute of Cardiometabolism and Nutrition (ICAN), UMR_S1166, Hôpital de la Pitié, Sorbonne Université, 75013, Paris, France.
| | - Marie Lhomme
- Institute of Cardiometabolism and Nutrition (ICAN), ICANalytics Lipidomic, Paris, France
| | - Cédric Pionneau
- Inserm, UMS Production et Analyse des données en Sciences de la vie et en Santé, PASS, Plateforme Post-Génomique de la Pitié-Salpêtrière, P3S, Sorbonne Université, 75013, Paris, France
| | - Lucrèce Matheron
- Institut de Biologie Paris-Seine, Sorbonne Université, 75005, Paris, France
| | - Maharajah Ponnaiah
- Institute of Cardiometabolism and Nutrition (ICAN), ICANalytics Lipidomic, Paris, France
| | - Sophie Galier
- Inserm, Institute of Cardiometabolism and Nutrition (ICAN), UMR_S1166, Hôpital de la Pitié, Sorbonne Université, 75013, Paris, France
| | - Sandrine Lebreton
- Université Paris Est Créteil, Université Paris Diderot, CNRS, IRD, INRAE, Institute of Ecology and Environmental Sciences of Paris (iEES), Sorbonne Université, 75005, Paris, France
| | - Marie Delbos
- Inserm, Institute of Cardiometabolism and Nutrition (ICAN), UMR_S1166, Hôpital de la Pitié, Sorbonne Université, 75013, Paris, France
| | - Feng Ma
- Inserm, Institute of Cardiometabolism and Nutrition (ICAN), UMR_S1166, Hôpital de la Pitié, Sorbonne Université, 75013, Paris, France
| | - Maryam Darabi
- Inserm, Institute of Cardiometabolism and Nutrition (ICAN), UMR_S1166, Hôpital de la Pitié, Sorbonne Université, 75013, Paris, France
| | - Petra El Khoury
- Laboratory of Biochemistry and Molecular Therapeutics, Faculty of Pharmacy, Pôle Technologie-Santé, Saint Joseph University, Beirut, Lebanon
| | - Marianne Abifadel
- Laboratory of Biochemistry and Molecular Therapeutics, Faculty of Pharmacy, Pôle Technologie-Santé, Saint Joseph University, Beirut, Lebanon
- INSERM LVTS U1148, Hôpital Bichat-Claude Bernard, Paris, France
| | - Philippe Couvert
- Inserm, Institute of Cardiometabolism and Nutrition (ICAN), UMR_S1166, Hôpital de la Pitié, Sorbonne Université, 75013, Paris, France
- Pôle de Biologie Médicale et Pathologie, Centre de Génétique Moléculaire et Chromosomique, Hôpitaux Universitaires Pitié-Salpêtrière-Charles Foix, Paris, France
| | - Philippe Giral
- Inserm, Institute of Cardiometabolism and Nutrition (ICAN), UMR_S1166, Hôpital de la Pitié, Sorbonne Université, 75013, Paris, France
| | - Philippe Lesnik
- Inserm, Institute of Cardiometabolism and Nutrition (ICAN), UMR_S1166, Hôpital de la Pitié, Sorbonne Université, 75013, Paris, France
| | - Maryse Guerin
- Inserm, Institute of Cardiometabolism and Nutrition (ICAN), UMR_S1166, Hôpital de la Pitié, Sorbonne Université, 75013, Paris, France
| | - Wilfried Le Goff
- Inserm, Institute of Cardiometabolism and Nutrition (ICAN), UMR_S1166, Hôpital de la Pitié, Sorbonne Université, 75013, Paris, France
| | - Anatol Kontush
- Inserm, Institute of Cardiometabolism and Nutrition (ICAN), UMR_S1166, Hôpital de la Pitié, Sorbonne Université, 75013, Paris, France
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Ma F, Darabi M, Lhomme M, Tubeuf E, Canicio A, Brerault J, Medadje N, Rached F, Lebreton S, Frisdal E, Brites F, Serrano C, Santos R, Gautier E, Huby T, El Khoury P, Carrié A, Abifadel M, Bruckert E, Guerin M, Couvert P, Giral P, Lesnik P, Le Goff W, Guillas I, Kontush A. Corrigendum to "Phospholipid transfer to high-density lipoprotein (HDL) upon triglyceride lipolysis is directly correlated with HDL-cholesterol levels and is not associated with cardiovascular risk" [Atherosclerosis 324C (2021) 1-8]. Atherosclerosis 2023; 372:57. [PMID: 37019714 DOI: 10.1016/j.atherosclerosis.2023.03.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
Affiliation(s)
- Feng Ma
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France.
| | - Maryam Darabi
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
| | - Marie Lhomme
- Institute of Cardiometabolism and Nutrition (ICAN), Paris, F-75013, France
| | - Emilie Tubeuf
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
| | - Aurélie Canicio
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
| | - Jean Brerault
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
| | - Narcisse Medadje
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
| | - Fabiana Rached
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France; Heart Institute-InCor, University of Sao Paulo, Sao Paulo, Brazil
| | | | - Eric Frisdal
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
| | - Fernando Brites
- Laboratory of Lipids and Atherosclerosis, Department of Clinical Biochemistry, INFIBIOC, University of Buenos Aires, CONICET, Buenos Aires, Argentina
| | - Carlos Serrano
- Heart Institute-InCor, University of Sao Paulo, Sao Paulo, Brazil
| | - Raul Santos
- Heart Institute-InCor, University of Sao Paulo, Sao Paulo, Brazil
| | - Emmanuel Gautier
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
| | - Thierry Huby
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
| | - Petra El Khoury
- Laboratory of Biochemistry and Molecular Therapeutics, Faculty of Pharmacy, Pôle Technologie-Santé, Saint Joseph University, Beirut, Lebanon; INSERM LVTS U1148, Hôpital Bichat-Claude Bernard, Paris, France
| | - Alain Carrié
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
| | - Marianne Abifadel
- Laboratory of Biochemistry and Molecular Therapeutics, Faculty of Pharmacy, Pôle Technologie-Santé, Saint Joseph University, Beirut, Lebanon; INSERM LVTS U1148, Hôpital Bichat-Claude Bernard, Paris, France
| | - Eric Bruckert
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France; Institute of Cardiometabolism and Nutrition (ICAN), Paris, F-75013, France; AP-HP, Groupe Hospitalier Pitié-Salpétrière, Paris, F-75013, France
| | - Maryse Guerin
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
| | - Philippe Couvert
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
| | - Philippe Giral
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France; Institute of Cardiometabolism and Nutrition (ICAN), Paris, F-75013, France; AP-HP, Groupe Hospitalier Pitié-Salpétrière, Paris, F-75013, France
| | - Philippe Lesnik
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
| | - Wilfried Le Goff
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
| | - Isabelle Guillas
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
| | - Anatol Kontush
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
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Bonnet JB, Couvert P, Di-Filippo M, Boissiere F, Cristol JP, Sutra T, Cheillan D, Moulin P, Sultan A. Tuberous xanthomatosis is not necessarily associated with increased plasma concentrations of cholestanol in cerebrotendinous xanthomatosis. J Intern Med 2023; 293:121-123. [PMID: 36085581 DOI: 10.1111/joim.13568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jean-Baptiste Bonnet
- UMR 1302, Desbrest Institute of Epidemiology and Public Health, University of Montpellier, INSERM, CHU, Montpellier, France.,Endocrinology-Diabetes-Nutrition Department, CHU Montpellier, University of Montpellier, Montpellier, France
| | - Philippe Couvert
- APHP, Sorbonne University, Pitié-Salpêtrière Hospital, Endocrine and Oncologic Biochemistry, Paris, France.,National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpêtriere, Paris, France.,Sorbonne University, Paris, France
| | - Mathilde Di-Filippo
- Dyslipidemia, Nutritional and Digestive Dysfunctions Unit, Department of Biochemistry and Molecular Biology, Biology and Pathology Center - East, Hospices Civils de Lyon, Bron, France.,CarMeN Laboratory, UMR INSERM U1060/INRA U1397, Claude Bernard Lyon 1 University, Bron, France
| | - Florian Boissiere
- Department of Plastic, Reconstructive and Aesthetic Surgery, Burns and Wound Healing Unit, CHRU Lapeyronie, Montpellier, France
| | - Jean-Paul Cristol
- PhyMedExp, University of Montpellier, INSERM U1046, CNRS UMR 9214, M, ontpellier, France.,Department of Biochemistry, Hôpital Lapeyronie, CHU Montpellier, Montpellier, France
| | - Thibault Sutra
- Department of Biochemistry, Hôpital Lapeyronie, CHU Montpellier, Montpellier, France
| | - David Cheillan
- CarMeN Laboratory, UMR INSERM U1060/INRA U1397, Claude Bernard Lyon 1 University, Bron, France.,Inborn Errors of Metabolism Unit, Department of Biochemistry and Molecular Biology, Biology and Pathology Center - East, Hospices Civils de Lyon, Bron, France
| | - Philippe Moulin
- CarMeN Laboratory, UMR INSERM U1060/INRA U1397, Claude Bernard Lyon 1 University, Bron, France.,Department of Endocrinology, Nutrition and Metabolic Diseases, Hospices Civils de Lyon, Louis Pradel Cardiovascular Hospital, Bron, France
| | - Ariane Sultan
- Endocrinology-Diabetes-Nutrition Department, CHU Montpellier, University of Montpellier, Montpellier, France.,PhyMedExp, University of Montpellier, INSERM U1046, CNRS UMR 9214, M, ontpellier, France
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Morais M, Couvert P, Jéru I, Machado MV. Rotor Syndrome Presenting as Dubin-Johnson Syndrome. Case Rep Gastroenterol 2022; 16:452-455. [PMID: 36157610 PMCID: PMC9459587 DOI: 10.1159/000525517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Accepted: 06/08/2022] [Indexed: 11/19/2022] Open
Abstract
A 42-year-old man with no relevant past medical history presented with intermittent mild icterus and no signs of chronic liver disease. Laboratory tests were notable for hyperbilirubinemia (total 7.97 mg/dL, direct 5.37 mg/dL), bilirubinuria, no signs of hemolysis, normal liver tests and lipids profile. Abdominal ultrasound was unremarkable. A panel of chronic liver diseases was negative except for increased serum (147.4 μg/dL) and urinary (179 μg/24 h) copper, with normal ceruloplasmin. No other Leipzig criteria for Wilson's disease were found, including a negative test for ATP7B gene mutations (by exome sequencing). Total urinary coproporphyrin was normal with predominance of isomer I (86% of total urinary coproporphyrin output). Clinical and laboratorial profile was compatible with Dubin-Johnson syndrome; however, exome sequencing and search for deletions in the ABBC2 gene (encoding MRP2) only found a heterozygous potentially pathogenic variant (c.1483A>G − p.Lys495Glu). Additional extended molecular analysis of genes implicated in bilirubin metabolism found a homozygous deletion of a region encompassing exons 4–16 of SLCO1B3 gene (encoding OATP1B3) and all SLCO1B1 exons (encoding OATP1B1), thereby establishing Rotor syndrome diagnosis. Rotor and Dubin-Johnson syndromes are rare autosomal recessive liver diseases characterized by chronic conjugated hyperbilirubinemia, caused by the absence of the hepatic function OATP1B1/B3 (leading to impaired hepatic bilirubin reuptake and storage) and MRP2 transporters (leading to impaired hepatic bilirubin excretion), respectively. We report a case of compound hereditary hyperbilirubinemia with a misleading presentation with special focus on its diagnosis, particularly the advantage of extensive unbiased genetic testing by dedicated laboratories. With this case, we aim to highlight the necessity of establishing a diagnosis, reassuring the patient, and avoiding unnecessary invasive and costly diagnostic procedures.
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Affiliation(s)
- Mariana Morais
- Gastroenterology Department, Faculdade de Medicina da Universidade de Lisboa, Lisbon, Portugal
- *Mariana Morais,
| | - Philippe Couvert
- Service de Biochimie Endocrinienne et Oncologique, APHP Sorbonne Université Hôpital de la Pitié-Salpêtrière, Paris, France
- Unité de recherche sur les maladies cardiovasculaires et métaboliques, Sorbonne Université-Inserm, Paris, France
| | - Isabelle Jéru
- Département de Génétique, Hôpital Pitié-Salpêtrière, Paris, France
- Centre de Recherche Saint-Antoine (CRSA), Sorbonne Université-Inserm, Paris, France
| | - Mariana Verdelho Machado
- Gastroenterology Department, Faculdade de Medicina da Universidade de Lisboa, Lisbon, Portugal
- Gastroenterology Department, Hospital de Vila Franca de Xira, Lisbon, Portugal
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Ma F, Darabi M, Lhomme M, Tubeuf E, Canicio A, Brerault J, Medadje N, Rached F, Lebreton S, Frisdal E, Brites F, Serrano C, Santos R, Gautier E, Huby T, El Khoury P, Carrié A, Abifadel M, Bruckert E, Guerin M, Couvert P, Giral P, Lesnik P, Le Goff W, Guillas I, Kontush A. Phospholipid transfer to high-density lipoprotein (HDL) upon triglyceride lipolysis is directly correlated with HDL-cholesterol levels and is not associated with cardiovascular risk. Atherosclerosis 2021; 324:1-8. [PMID: 33798922 DOI: 10.1016/j.atherosclerosis.2021.03.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 02/05/2021] [Accepted: 03/04/2021] [Indexed: 10/22/2022]
Abstract
BACKGROUND AND AIMS While low concentrations of high-density lipoprotein-cholesterol (HDL-C) represent a well-established cardiovascular risk factor, extremely high HDL-C is paradoxically associated with elevated cardiovascular risk, resulting in the U-shape relationship with cardiovascular disease. Free cholesterol transfer to HDL upon lipolysis of triglyceride-rich lipoproteins (TGRL) was recently reported to underlie this relationship, linking HDL-C to triglyceride metabolism and atherosclerosis. In addition to free cholesterol, other surface components of TGRL, primarily phospholipids, are transferred to HDL during lipolysis. It remains indeterminate as to whether such transfer is linked to HDL-C and cardiovascular disease. METHODS AND RESULTS When TGRL was labelled with fluorescent phospholipid 1,1'-dioctadecyl-3,3,3',3'-tetramethylindocarbocyanine perchlorate (DiI), time- and dose-dependent transfer of DiI to HDL was observed upon incubations with lipoprotein lipase (LPL). The capacity of HDL to acquire DiI was decreased by -36% (p<0.001) in low HDL-C patients with acute myocardial infarction (n = 22) and by -95% (p<0.001) in low HDL-C subjects with Tangier disease (n = 7), unchanged in low HDL-C patients with Type 2 diabetes (n = 17) and in subjects with high HDL-C (n = 20), and elevated in subjects with extremely high HDL-C (+11%, p<0.05) relative to healthy normolipidemic controls. Across all the populations combined, HDL capacity to acquire DiI was directly correlated with HDL-C (r = 0.58, p<0.001). No relationship of HDL capacity to acquire DiI with both overall and cardiovascular mortality obtained from epidemiological studies for the mean HDL-C levels observed in the studied populations was obtained. CONCLUSIONS These data indicate that the capacity of HDL to acquire phospholipid from TGRL upon LPL-mediated lipolysis is proportional to HDL-C and does not reflect cardiovascular risk in subjects widely differing in HDL-C levels.
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Affiliation(s)
- Feng Ma
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France.
| | - Maryam Darabi
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
| | - Marie Lhomme
- Institute of Cardiometabolism and Nutrition (ICAN), Paris, F-75013, France
| | - Emilie Tubeuf
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
| | - Aurélie Canicio
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
| | - Jean Brerault
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
| | - Narcisse Medadje
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
| | - Fabiana Rached
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France; Heart Institute-InCor, University of Sao Paulo, Sao Paulo, Brazil
| | | | - Eric Frisdal
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
| | - Fernando Brites
- Laboratory of Lipids and Atherosclerosis, Department of Clinical Biochemistry, INFIBIOC, University of Buenos Aires, CONICET. Buenos Aires, Argentina
| | - Carlos Serrano
- Heart Institute-InCor, University of Sao Paulo, Sao Paulo, Brazil
| | - Raul Santos
- Heart Institute-InCor, University of Sao Paulo, Sao Paulo, Brazil
| | - Emmanuel Gautier
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
| | - Thierry Huby
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
| | - Petra El Khoury
- Laboratory of Biochemistry and Molecular Therapeutics, Faculty of Pharmacy, Pôle Technologie-Santé, Saint Joseph University, Beirut, Lebanon; INSERM LVTS U1148, Hôpital Bichat-Claude Bernard, Paris, France
| | - Alain Carrié
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
| | - Marianne Abifadel
- Laboratory of Biochemistry and Molecular Therapeutics, Faculty of Pharmacy, Pôle Technologie-Santé, Saint Joseph University, Beirut, Lebanon; INSERM LVTS U1148, Hôpital Bichat-Claude Bernard, Paris, France
| | - Eric Bruckert
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France; Institute of Cardiometabolism and Nutrition (ICAN), Paris, F-75013, France; AP-HP, Groupe Hospitalier Pitié-Salpétrière, Paris, F-75013, France
| | - Maryse Guerin
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
| | - Philippe Couvert
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
| | - Philippe Giral
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France; Institute of Cardiometabolism and Nutrition (ICAN), Paris, F-75013, France; AP-HP, Groupe Hospitalier Pitié-Salpétrière, Paris, F-75013, France
| | - Philippe Lesnik
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
| | - Wilfried Le Goff
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
| | - Isabelle Guillas
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
| | - Anatol Kontush
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitie-Salpetriere, 91 Bld de L'Hopital, 75013, Paris, France; Sorbonne University, Paris, France
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Small L, Ingerslev LR, Manitta E, Laker RC, Hansen AN, Deeney B, Carrié A, Couvert P, Barrès R. Ablation of DNA-methyltransferase 3A in skeletal muscle does not affect energy metabolism or exercise capacity. PLoS Genet 2021; 17:e1009325. [PMID: 33513138 PMCID: PMC7875352 DOI: 10.1371/journal.pgen.1009325] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 02/10/2021] [Accepted: 01/04/2021] [Indexed: 02/03/2023] Open
Abstract
In response to physical exercise and diet, skeletal muscle adapts to energetic demands through large transcriptional changes. This remodelling is associated with changes in skeletal muscle DNA methylation which may participate in the metabolic adaptation to extracellular stimuli. Yet, the mechanisms by which muscle-borne DNA methylation machinery responds to diet and exercise and impacts muscle function are unknown. Here, we investigated the function of de novo DNA methylation in fully differentiated skeletal muscle. We generated muscle-specific DNA methyltransferase 3A (DNMT3A) knockout mice (mD3AKO) and investigated the impact of DNMT3A ablation on skeletal muscle DNA methylation, exercise capacity and energy metabolism. Loss of DNMT3A reduced DNA methylation in skeletal muscle over multiple genomic contexts and altered the transcription of genes known to be influenced by DNA methylation, but did not affect exercise capacity and whole-body energy metabolism compared to wild type mice. Loss of DNMT3A did not alter skeletal muscle mitochondrial function or the transcriptional response to exercise however did influence the expression of genes involved in muscle development. These data suggest that DNMT3A does not have a large role in the function of mature skeletal muscle although a role in muscle development and differentiation is likely. Skeletal muscle is a plastic tissue able to adapt to environmental stimuli such as exercise and diet in order to respond to energetic demand. One of the ways in which skeletal muscle can rapidly react to these stimuli is DNA methylation. This is when chemical groups are attached to DNA, potentially influencing the transcription of genes. We investigated the function of DNA methylation in skeletal muscle by generating mice that lacked one of the main enzymes responsible for de novo DNA methylation, DNA methyltransferase 3A (DNMT3A), specifically in muscle. We found that loss of DNMT3A reduced DNA methylation in muscle however this did not lead to differences in exercise capacity or energy metabolism. This suggests that DNMT3a is not involved in the adaptation of skeletal muscle to diet or exercise.
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Affiliation(s)
- Lewin Small
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Lars R. Ingerslev
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Eleonora Manitta
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Rhianna C. Laker
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Ann N. Hansen
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Brendan Deeney
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Alain Carrié
- Sorbonne Université-INSERM UMR_S 1166 ICAN, Pitié-Salpêtrière Hospital, Paris, France
| | - Philippe Couvert
- Sorbonne Université-INSERM UMR_S 1166 ICAN, Pitié-Salpêtrière Hospital, Paris, France
| | - Romain Barrès
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- * E-mail:
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7
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Izzedine H, Brocheriou I, Arzouk N, Seilhean D, Couvert P, Cluzel P, Pha M, Le Monnier O, Varnous S, Andreelli F, Amoura Z, Mathian A. COVID-19-associated collapsing glomerulopathy: a report of two cases and literature review. Intern Med J 2021; 50:1551-1558. [PMID: 33354883 DOI: 10.1111/imj.15041] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 07/13/2020] [Accepted: 08/16/2020] [Indexed: 12/14/2022]
Abstract
Nephrotic range proteinuria has been reported during the course of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and coronavirus disease (COVID-19). However, the pathological mechanisms underlying this manifestation are unknown. In this article, we present two cases of collapsing glomerulopathy (CG) associated with acute tubular necrosis during the course of COVID-19, and review the literature for similar reports. In our two cases, as in the 14 cases reported so far, the patients were of African ancestry. The 14 patients assessed had an APOL1 high-risk genotype. At the end of the reported period, two patients had died and five patients were still requiring dialysis. The 16 cases detailed in the present report strongly argue in favour of a causal link between SARS-CoV-2 infection and the occurrence of CG in patients homozygous for APOL1 high-risk genotype for which the term COVID-associated nephropathy (COVIDAN) can be put forward.
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Affiliation(s)
- Hassan Izzedine
- Department of Nephrology, Peupliers Private Hospital, Ramsay Générale de Santé, Paris, France
| | - Isabelle Brocheriou
- Department of Pathology, Sorbonne University, Assistance Publique-Hôpitaux de Paris, Groupement Hospitalier Pitié-Salpêtrière, Paris, France
| | - Nadia Arzouk
- Department of Kidney Transplantation, Assistance Publique-Hôpitaux de Paris, Groupement Hospitalier Pitié-Salpêtrière, Paris, France
| | - Danielle Seilhean
- Department of Neuropathology, Sorbonne University, Assistance Publique-Hôpitaux de Paris, Groupement Hospitalier Pitié-Salpêtrière, Paris, France
| | - Philippe Couvert
- Department of Endocrine & Oncology, Sorbonne University, Assistance Publique-Hôpitaux de Paris, Groupement Hospitalier Pitié-Salpêtrière, UMR-S1166, Paris, France.,Service de Biochimie endocrinienne et oncologique, Sorbonne Université, Assistance publique-Hôpitaux de Paris, Groupement hospitalier Pitié-Salpêtrière, Paris, France
| | - Philippe Cluzel
- Department of Interventional Cardiovascular Radiology, Sorbonne Université, Assistance Publique-Hôpitaux de Paris, Groupement Hospitalier Pitié-Salpêtrière, Paris, France
| | - Micheline Pha
- Service de Medecine Interne 2, Institut E3M, Sorbonne University, Assistance Publique-Hôpitaux de Paris, Groupement Hospitalier Pitié-Salpêtrière, Paris, France
| | - Ophelie Le Monnier
- Service de Medecine Interne 2, Institut E3M, Sorbonne University, Assistance Publique-Hôpitaux de Paris, Groupement Hospitalier Pitié-Salpêtrière, Paris, France
| | - Shadia Varnous
- Department of Cardiothoracic Surgery, Sorbonne University, Assistance Publique-Hôpitaux de Paris, Groupement Hospitalier Pitié-Salpêtrière, Paris, France
| | - Fabrizio Andreelli
- Department of Diabetology & Metabolism, Institut E3M, ICAN, Sorbonne University, Assistance Publique-Hôpitaux de Paris, Groupement Hospitalier Pitié-Salpêtrière, Paris, France
| | - Zahir Amoura
- Service de Medecine Interne 2, Institut E3M, Sorbonne University, Assistance Publique-Hôpitaux de Paris, Groupement Hospitalier Pitié-Salpêtrière, Paris, France
| | - Alexis Mathian
- Service de Medecine Interne 2, Institut E3M, Sorbonne University, Assistance Publique-Hôpitaux de Paris, Groupement Hospitalier Pitié-Salpêtrière, Paris, France
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8
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Feng M, Darabi M, Tubeuf E, Canicio A, Lhomme M, Frisdal E, Lanfranchi-Lebreton S, Matheron L, Rached F, Ponnaiah M, Serrano CV, Santos RD, Brites F, Bolbach G, Gautier E, Huby T, Carrie A, Bruckert E, Guerin M, Couvert P, Giral P, Lesnik P, Le Goff W, Guillas I, Kontush A. Free cholesterol transfer to high-density lipoprotein (HDL) upon triglyceride lipolysis underlies the U-shape relationship between HDL-cholesterol and cardiovascular disease. Eur J Prev Cardiol 2019; 27:1606-1616. [PMID: 31840535 DOI: 10.1177/2047487319894114] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Low concentrations of high-density lipoprotein cholesterol (HDL-C) represent a well-established cardiovascular risk factor. Paradoxically, extremely high HDL-C levels are equally associated with elevated cardiovascular risk, resulting in the U-shape relationship of HDL-C with cardiovascular disease. Mechanisms underlying this association are presently unknown. We hypothesised that the capacity of high-density lipoprotein (HDL) to acquire free cholesterol upon triglyceride-rich lipoprotein (TGRL) lipolysis by lipoprotein lipase underlies the non-linear relationship between HDL-C and cardiovascular risk. METHODS To assess our hypothesis, we developed a novel assay to evaluate the capacity of HDL to acquire free cholesterol (as fluorescent TopFluor® cholesterol) from TGRL upon in vitro lipolysis by lipoprotein lipase. RESULTS When the assay was applied to several populations markedly differing in plasma HDL-C levels, transfer of free cholesterol was significantly decreased in low HDL-C patients with acute myocardial infarction (-45%) and type 2 diabetes (-25%), and in subjects with extremely high HDL-C of >2.59 mmol/L (>100 mg/dL) (-20%) versus healthy normolipidaemic controls. When these data were combined and plotted against HDL-C concentrations, an inverse U-shape relationship was observed. Consistent with these findings, animal studies revealed that the capacity of HDL to acquire cholesterol upon lipolysis was reduced in low HDL-C apolipoprotein A-I knock-out mice and was negatively correlated with aortic accumulation of [3H]-cholesterol after oral gavage, attesting this functional characteristic as a negative metric of postprandial atherosclerosis. CONCLUSIONS Free cholesterol transfer to HDL upon TGRL lipolysis may underlie the U-shape relationship between HDL-C and cardiovascular disease, linking HDL-C to triglyceride metabolism and atherosclerosis.
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Affiliation(s)
- Ma Feng
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitié-Salpétrière, Paris, France.,Sorbonne University, Paris, France
| | - Maryam Darabi
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitié-Salpétrière, Paris, France.,Sorbonne University, Paris, France.,Institute of Cardiometabolism and Nutrition (ICAN), Paris, France
| | - Emilie Tubeuf
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitié-Salpétrière, Paris, France.,Sorbonne University, Paris, France
| | - Aurélie Canicio
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitié-Salpétrière, Paris, France.,Sorbonne University, Paris, France.,Institute of Cardiometabolism and Nutrition (ICAN), Paris, France
| | - Marie Lhomme
- Institute of Cardiometabolism and Nutrition (ICAN), Paris, France
| | - Eric Frisdal
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitié-Salpétrière, Paris, France.,Sorbonne University, Paris, France
| | | | | | - Fabiana Rached
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitié-Salpétrière, Paris, France.,Sorbonne University, Paris, France.,Heart Institute-InCor, University of Sao Paulo, Brazil
| | | | | | - Raul D Santos
- Heart Institute-InCor, University of Sao Paulo, Brazil
| | - Fernando Brites
- Heart Institute-InCor, University of Sao Paulo, Brazil.,Laboratory of Lipids and Atherosclerosis, Department of Clinical Biochemistry, INFIBIOC, University of Buenos Aires, CONICET, Argentina
| | | | - Emmanuel Gautier
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitié-Salpétrière, Paris, France.,Sorbonne University, Paris, France
| | - Thierry Huby
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitié-Salpétrière, Paris, France.,Sorbonne University, Paris, France
| | - Alain Carrie
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitié-Salpétrière, Paris, France.,Sorbonne University, Paris, France
| | - Eric Bruckert
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitié-Salpétrière, Paris, France.,Sorbonne University, Paris, France.,Institute of Cardiometabolism and Nutrition (ICAN), Paris, France.,AP-HP, Groupe hospitalier Pitié-Salpétrière, Paris, France
| | - Maryse Guerin
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitié-Salpétrière, Paris, France.,Sorbonne University, Paris, France
| | - Philippe Couvert
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitié-Salpétrière, Paris, France.,Sorbonne University, Paris, France
| | - Philippe Giral
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitié-Salpétrière, Paris, France.,Sorbonne University, Paris, France.,Institute of Cardiometabolism and Nutrition (ICAN), Paris, France.,AP-HP, Groupe hospitalier Pitié-Salpétrière, Paris, France
| | - Philippe Lesnik
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitié-Salpétrière, Paris, France.,Sorbonne University, Paris, France
| | - Wilfried Le Goff
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitié-Salpétrière, Paris, France.,Sorbonne University, Paris, France
| | - Isabelle Guillas
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitié-Salpétrière, Paris, France.,Sorbonne University, Paris, France
| | - Anatol Kontush
- National Institute for Health and Medical Research (INSERM) UMR_S 1166, Faculty of Medicine Pitié-Salpétrière, Paris, France.,Sorbonne University, Paris, France
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9
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Ma F, Darabi M, Canicio A, Lhomme M, Frisdal E, Rached F, Serrano C, Santos R, Brites F, Gautier E, Huby T, Carrié A, Bruckert E, Guerin M, Couvert P, Giral P, Le Goff W, Lesnik P, Guillas I, Kontush A. Capacity Of Hdl To Acquire Free Cholesterol From Triglyceride-Rich Lipoproteins Upon Their Lipolysis Underlies The U-Shape Relationship Between Hdl-Cholesterol And Cardiovascular Disease. Atherosclerosis 2019. [DOI: 10.1016/j.atherosclerosis.2019.06.314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Bittar R, Giral P, Couvert P, Cherfils C, Fesel-Fouquier V, Koujah N, Borgel A, Lacorte J, Alibay N, Delestre F, Bonnefont-Rousselot D. Hypertriglyceridemia And Sensibility To Exogenous Fat. Atherosclerosis 2019. [DOI: 10.1016/j.atherosclerosis.2019.06.720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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11
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El Khoury P, Couvert P, Elbitar S, Ghaleb Y, Abou-Khalil Y, Azar Y, Ayoub C, Superville A, Guérin M, Rabès JP, Varret M, Boileau C, Jambart S, Giral P, Carrié A, Le Goff W, Abifadel M. Identification of the first Tangier disease patient in Lebanon carrying a new pathogenic variant in ABCA1. J Clin Lipidol 2018; 12:1374-1382. [DOI: 10.1016/j.jacl.2018.08.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 08/29/2018] [Accepted: 08/29/2018] [Indexed: 01/07/2023]
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12
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Couvert P, Giral P, Boelle PY, Carreau V, Béliard S, Lacorte JM, Lesnik P, Paillard F, Valéro R, Rotthier A, Bruckert E, Carrié A. Genetic testing of familial hypercholesterolemia: Monogenic form and polygenic contribution to cardiovascular risk. Atherosclerosis 2017. [DOI: 10.1016/j.atherosclerosis.2017.06.304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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13
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Kuburovic V, Vekic J, Zeljkovic A, Carrie A, Kotur-Stevuljevic J, Bojanin D, Kosutic J, Spasojevic-Kalimanovska V, Miljkovic M, Kuburovic N, Couvert P. The usefulness of advanced lipid and oxidative stress testing for diagnosis and management of low HDL-cholesterol phenotype: A case report. Clin Biochem 2017. [PMID: 28648695 DOI: 10.1016/j.clinbiochem.2017.06.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
OBJECTIVE Plasma high-density lipoprotein cholesterol (HDL-C) level is a strong inverse predictor of cardiovascular disease (CVD) development. Tangier disease, a consequence of mutations in the ATP binding cassette transporter 1 (ABCA1) gene, is associated with very low HDL-C levels. Still, the relationship between Tangier disease and CVD is not always evident. The study investigates usefulness of lipoprotein subfractions, oxidative stress and paraoxonase 1 (PON1) status assessment for evaluation and management of patient with low HDL-C phenotype. PATIENT AND METHODS A 12-year-old boy was hospitalised due to hypertension. Laboratory evaluation revealed low HDL-C level, and subsequent molecular diagnostic confirmed Tangier disease. Lipoprotein subfractions were assessed by gradient-gel electrophoresis. Oxidative stress status was estimated by measuring total antioxidative status, total oxidative status, prooxidative-antioxidative balance, malondialdehyde and advanced oxidation protein products levels. Activity of paraoxonase 1 in serum and its distribution within HDL subclasses was also determined (ten healthy boys aged 13.1±3.4years served as the reference group). RESULTS Analysis of oxidative stress status biomarkers revealed a state of prolonged prooxidants activity. In turn, serum PON1 activity was substantially reduced. The majority of PON1 activity was present on HDL 2 particles. CONCLUSION Impaired antioxidative potential of HDL may point toward hidden cardiovascular risk in isolated low HDL-phenotype.
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Affiliation(s)
- Vladimir Kuburovic
- Mother and Child Healthcare Institute of Serbia, Radoja Dakica 6, New Belgrade, Serbia
| | - Jelena Vekic
- Department of Medical Biochemistry, Faculty of Pharmacy, University of Belgrade, Vojvode Stepe 450, Belgrade, Serbia.
| | - Aleksandra Zeljkovic
- Department of Medical Biochemistry, Faculty of Pharmacy, University of Belgrade, Vojvode Stepe 450, Belgrade, Serbia
| | - Alain Carrie
- Hôpitaux Universitaires Pitié-Salpêtrière-Charles Foix, Pôle de Biologie Médicale et Pathologie, Centre de Génétique Moléculaire et Chromosomique, Bd de l'Hôpital 47, Paris, France
| | - Jelena Kotur-Stevuljevic
- Department of Medical Biochemistry, Faculty of Pharmacy, University of Belgrade, Vojvode Stepe 450, Belgrade, Serbia
| | - Dragana Bojanin
- Mother and Child Healthcare Institute of Serbia, Radoja Dakica 6, New Belgrade, Serbia
| | - Jovan Kosutic
- Mother and Child Healthcare Institute of Serbia, Radoja Dakica 6, New Belgrade, Serbia
| | - Vesna Spasojevic-Kalimanovska
- Department of Medical Biochemistry, Faculty of Pharmacy, University of Belgrade, Vojvode Stepe 450, Belgrade, Serbia
| | - Milica Miljkovic
- Department of Medical Biochemistry, Faculty of Pharmacy, University of Belgrade, Vojvode Stepe 450, Belgrade, Serbia
| | - Nina Kuburovic
- Mother and Child Healthcare Institute of Serbia, Radoja Dakica 6, New Belgrade, Serbia
| | - Philippe Couvert
- Hôpitaux Universitaires Pitié-Salpêtrière-Charles Foix, Pôle de Biologie Médicale et Pathologie, Centre de Génétique Moléculaire et Chromosomique, Bd de l'Hôpital 47, Paris, France
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14
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Degos B, Nadjar Y, Amador MDM, Lamari F, Sedel F, Roze E, Couvert P, Mochel F. Natural history of cerebrotendinous xanthomatosis: a paediatric disease diagnosed in adulthood. Orphanet J Rare Dis 2016; 11:41. [PMID: 27084087 PMCID: PMC4833925 DOI: 10.1186/s13023-016-0419-x] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Accepted: 04/04/2016] [Indexed: 02/07/2023] Open
Abstract
Cerebrotendinous xanthomatosis (CTX) is among the few inherited neurometabolic disorders amenable to specific treatment. It is easily diagnosed using plasma cholestanol. We wished to delineate the natural history of the most common neurological and non-neurological symptoms in thirteen patients with CTX. Diarrhea almost always developed within the first year of life. Cataract and school difficulties usually occurred between 5 and 15 years of age preceding by years the onset of motor or psychiatric symptoms. The median age at diagnosis was 24.5 years old. It appears critical to raise awareness about CTX among paediatricians in order to initiate treatment before irreversible damage occurs.
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Affiliation(s)
- Bertrand Degos
- AP-HP, Département des Maladies du Système Nerveux, Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | - Yann Nadjar
- AP-HP, Département des Maladies du Système Nerveux, Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | - Maria del Mar Amador
- AP-HP, Département des Maladies du Système Nerveux, Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | - Foudil Lamari
- AP-HP, Département de Biochimie Métabolique, Groupe Hospitalier Pitié-Salpêtrière, Paris, France.,AP-HP, UF Neurométabolique Bioclinique et Génétique, Groupe Hospitalier Pitié-Salpêtrière, Paris, France.,Sorbonne Universités, GRC Neurométabolisme, UPMC Univ Paris 6, Paris, France
| | - Frédéric Sedel
- MedDay Pharmaceuticals, Institut du Cerveau et de la Moelle épinière, Paris, France
| | - Emmanuel Roze
- AP-HP, Département des Maladies du Système Nerveux, Groupe Hospitalier Pitié-Salpêtrière, Paris, France.,UPMC Univ Paris 6 UMR S 1127, Inserm U 1127, CNRS UMR 722, Institut du Cerveau et de la Moelle épinière, Sorbonne Universités, Paris, France
| | - Philippe Couvert
- AP-HP, Service de Biochimie Endocrinienne et Oncologique, Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | - Fanny Mochel
- AP-HP, UF Neurométabolique Bioclinique et Génétique, Groupe Hospitalier Pitié-Salpêtrière, Paris, France. .,Sorbonne Universités, GRC Neurométabolisme, UPMC Univ Paris 6, Paris, France. .,UPMC Univ Paris 6 UMR S 1127, Inserm U 1127, CNRS UMR 722, Institut du Cerveau et de la Moelle épinière, Sorbonne Universités, Paris, France. .,AP-HP, Département de Génétique, Groupe Hospitalier Pitié-Salpêtrière, 47-83 Boulevard de l'Hôpital, 75651, Paris, Cedex 13, France.
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15
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Degos B, Nadjar Y, Amador MDM, Lamari F, Sedel F, Roze E, Couvert P, Mochel F. Natural history of cerebrotendinous xanthomatosis: a paediatric disease diagnosed in adulthood. Orphanet J Rare Dis 2016. [PMID: 27084087 DOI: 10.1186/s13023‐016‐0419‐x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Cerebrotendinous xanthomatosis (CTX) is among the few inherited neurometabolic disorders amenable to specific treatment. It is easily diagnosed using plasma cholestanol. We wished to delineate the natural history of the most common neurological and non-neurological symptoms in thirteen patients with CTX. Diarrhea almost always developed within the first year of life. Cataract and school difficulties usually occurred between 5 and 15 years of age preceding by years the onset of motor or psychiatric symptoms. The median age at diagnosis was 24.5 years old. It appears critical to raise awareness about CTX among paediatricians in order to initiate treatment before irreversible damage occurs.
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Affiliation(s)
- Bertrand Degos
- AP-HP, Département des Maladies du Système Nerveux, Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | - Yann Nadjar
- AP-HP, Département des Maladies du Système Nerveux, Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | - Maria del Mar Amador
- AP-HP, Département des Maladies du Système Nerveux, Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | - Foudil Lamari
- AP-HP, Département de Biochimie Métabolique, Groupe Hospitalier Pitié-Salpêtrière, Paris, France.,AP-HP, UF Neurométabolique Bioclinique et Génétique, Groupe Hospitalier Pitié-Salpêtrière, Paris, France.,Sorbonne Universités, GRC Neurométabolisme, UPMC Univ Paris 6, Paris, France
| | - Frédéric Sedel
- MedDay Pharmaceuticals, Institut du Cerveau et de la Moelle épinière, Paris, France
| | - Emmanuel Roze
- AP-HP, Département des Maladies du Système Nerveux, Groupe Hospitalier Pitié-Salpêtrière, Paris, France.,UPMC Univ Paris 6 UMR S 1127, Inserm U 1127, CNRS UMR 722, Institut du Cerveau et de la Moelle épinière, Sorbonne Universités, Paris, France
| | - Philippe Couvert
- AP-HP, Service de Biochimie Endocrinienne et Oncologique, Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | - Fanny Mochel
- AP-HP, UF Neurométabolique Bioclinique et Génétique, Groupe Hospitalier Pitié-Salpêtrière, Paris, France. .,Sorbonne Universités, GRC Neurométabolisme, UPMC Univ Paris 6, Paris, France. .,UPMC Univ Paris 6 UMR S 1127, Inserm U 1127, CNRS UMR 722, Institut du Cerveau et de la Moelle épinière, Sorbonne Universités, Paris, France. .,AP-HP, Département de Génétique, Groupe Hospitalier Pitié-Salpêtrière, 47-83 Boulevard de l'Hôpital, 75651, Paris, Cedex 13, France.
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16
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Lhermusier T, Severin S, Van Rothem J, Garcia C, Bertrand-Michel J, Le Faouder P, Hechler B, Broccardo C, Couvert P, Chimini G, Sié P, Payrastre B. ATP-binding cassette transporter 1 (ABCA1) deficiency decreases platelet reactivity and reduces thromboxane A2 production independently of hematopoietic ABCA1. J Thromb Haemost 2016; 14:585-95. [PMID: 26749169 DOI: 10.1111/jth.13247] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Indexed: 02/03/2023]
Abstract
UNLABELLED ESSENTIALS: The role of ATP-binding cassette transporter 1 (ABCA1) in platelet functions is poorly characterized. We studied the impact of ABCA1 deficiency on platelet responses in a mouse model and two Tangier patients. ABCA1-deficient platelets exhibit reduced positive feedback loop mechanisms. This reduced reactivity is dependent on external environment and independent of hematopoietic ABCA1. SUMMARY BACKGROUND The ATP-binding cassette transporter ABCA1 is required for the conversion of apolipoprotein A-1 to high-density lipoprotein (HDL), and its defect causes Tangier disease, a rare disorder characterized by an absence of HDL and accumulation of cholesterol in peripheral tissues. The role of ABCA1 in platelet functions remains poorly characterized. OBJECTIVE To determine the role of ABCA1 in platelet functions and to clarify controversies concerning its implication in processes as fundamental as platelet phosphatidylserine exposure and control of platelet membrane lipid composition. METHODS AND RESULTS We studied the impact of ABCA1 deficiency on platelet responses in a mouse model and in two Tangier patients. We show that platelets in ABCA1-deficient mice are slightly larger in size and exhibit aggregation and secretion defects in response to low concentrations of thrombin and collagen. These platelets have normal cholesterol and major phospholipid composition, granule morphology, or calcium-induced phosphatidylserine exposure. Interestingly, ABCA1-deficient platelets display a reduction in positive feedback loop mechanisms, particularly in thromboxane A2 (TXA2) production. Hematopoietic chimera mice demonstrated that defective eicosanoids production, particularly TXA2, was primarily dependent on external environment and not on the hematopoietic ABCA1. Decreased aggregation and production of TXA2 and eicosanoids were also observed in platelets from Tangier patients. CONCLUSIONS Absence of ABCA1 and low HDL level induce reduction of platelet reactivity by decreasing positive feedback loops, particularly TXA2 production through a hematopoietic ABCA1-independent mechanism.
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Affiliation(s)
- T Lhermusier
- Inserm, U1048 et Université Toulouse 3, I2MC, Toulouse, France
- Département de Cardiologie, CHU de Toulouse, Toulouse, France
| | - S Severin
- Inserm, U1048 et Université Toulouse 3, I2MC, Toulouse, France
| | - J Van Rothem
- Inserm, U1048 et Université Toulouse 3, I2MC, Toulouse, France
- Département de Cardiologie, CHU de Toulouse, Toulouse, France
| | - C Garcia
- Laboratoire d'Hématologie, CHU de Toulouse, Toulouse, France
| | | | - P Le Faouder
- I2MC, Lipidomic Core Facility-MetaToul, Toulouse, France
| | - B Hechler
- Inserm UMR-S949, Etablissement Français du Sang-Alsace, Strasbourg, France
| | | | - P Couvert
- Service de Biochimie Endocrinienne et Oncologique, Hôpital Pitié Salpêtrière, Paris, France
| | - G Chimini
- CIML, Parc Scientifique de Luminy, Case 906, Marseille Luminy, France
| | - P Sié
- Inserm, U1048 et Université Toulouse 3, I2MC, Toulouse, France
- Laboratoire d'Hématologie, CHU de Toulouse, Toulouse, France
| | - B Payrastre
- Inserm, U1048 et Université Toulouse 3, I2MC, Toulouse, France
- Laboratoire d'Hématologie, CHU de Toulouse, Toulouse, France
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Nadjar Y, Couvert P, Lamari F, Amador MDM, Flamand-Roze E, Degos B, Mochel F. Histoire naturelle de la xanthomatose cérébrotendineuse : une pathologie pédiatrique diagnostiquée à l’âge adulte. Rev Neurol (Paris) 2015. [DOI: 10.1016/j.neurol.2015.01.246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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18
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Gilibert S, Galle-Treger L, Moreau M, Saint-Charles F, Costa S, Ballaire R, Couvert P, Carrié A, Lesnik P, Huby T. Adrenocortical Scavenger Receptor Class B Type I Deficiency Exacerbates Endotoxic Shock and Precipitates Sepsis-Induced Mortality in Mice. J I 2014; 193:817-26. [DOI: 10.4049/jimmunol.1303164] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Lagarde J, Roze E, Apartis E, Pothalil D, Sedel F, Couvert P, Vidailhet M, Degos B. Myoclonus and dystonia in cerebrotendinous xanthomatosis. Mov Disord 2012; 27:1805-10. [PMID: 23115103 DOI: 10.1002/mds.25206] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Revised: 08/09/2012] [Accepted: 08/22/2012] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Cerebrotendinous xanthomatosis (CTX) is an inherited neurometabolic disorder. The main neurological manifestations of the disease are pyramidal syndrome, ataxia, peripheral neuropathy, cognitive impairment, epilepsy, and psychiatric disturbances. Myoclonic dystonia has been reported on in the setting of various neurometabolic diseases. Anecdotal reports describe movement disorders associated with CTX, but no dystonia with myoclonic events. METHODS We collected clinical, biochemical, electrophysiological, neuroradiological, and genetic data of 6 patients with myoclonus and mild dystonia associated with CTX. From a systematic literature review, we analyzed 31 patients with movement disorders secondary to CTX. RESULTS Our 6 patients presented distal myoclonus with mild dystonia of the upper limbs. Myoclonus was of subcortical origin, based on neurophysiological recordings, and differed from oromandibular myoclonus previously described in CTX patients. CONCLUSIONS These results expand the phenotype of CTX and suggest that myoclonus and/or dystonia are underdiagnosed. In keeping with our findings, tremors previously observed in CTX patients might actually correspond to myoclonic events. We hypothesize that a dysfunction of the dentate nuclei-basal ganglia pathway may be involved.
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Affiliation(s)
- Julien Lagarde
- AP-HP Département de Neurologie, Hôpital de la Salpêtrière, Paris, France
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20
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Couvert P, Carrié A, Tezenas du Montcel S, Vaysse J, Sutton A, Barget N, Trinchet JC, Beaugrand M, Ganne N, Giral P, Chelly J. Insulin-like growth factor 2 gene methylation in peripheral blood mononuclear cells of patients with hepatitis C related cirrhosis or hepatocellular carcinoma. Clin Res Hepatol Gastroenterol 2012; 36:345-51. [PMID: 22902352 DOI: 10.1016/j.clinre.2012.06.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2012] [Accepted: 06/26/2012] [Indexed: 02/04/2023]
Abstract
UNLABELLED Igf2 gene specific hypomethylation has been demonstrated in hepatocellular carcinoma (HCC) cells and in non-tumoral liver samples from patients with HCV-related cirrhosis who further developed HCC. In patients with colorectal cancers, Igf2 hypomethylation is found in peripheral blood mononuclear cells (PBMC) even prior to the occurrence of cancer. AIM To compare Igf2 methylation in PBMC from healthy donors and patients with HCV-related cirrhosis without or with history of HCC. PATIENTS AND METHODS After DNA extraction from frozen PBMC samples of 52 healthy blood donors and 121 patients with HCV-related cirrhosis either without (n=59) or with past or present HCC (n=62), and sodium bisulfite treatment, unbiased PCR amplification and Denaturing High Performance Liquid Chromatography (DHPLC) analysis were used for methylation analysis at the differentially methylated region 2 of Igf2. Methylation profiles were classified in three groups (unmethylated, U; methylated, M; and intermediate, UM) according to the proportions of M and U alleles, blindly to clinical data. In addition, 677C-T mutation of Methylenetetrahydrofolate Reductase (MTHFR) was investigated by fluorescent probes. RESULTS Prevalences of U, UM and M Igf2 profiles were: 8%, 65% and 27% in blood donors, 0%, 81% and 19% in patients with HCV-related cirrhosis without HCC, 71%, 29% and 0% in patients with HCC (P<0.0001). Igf2 methylation profile was independent from gender, age, body mass index, and presence of 677C-T mutation of MTHFR. CONCLUSION These observations suggest a decrease of Igf2 methylation from cirrhosis to HCC in patients with HCV infection, which may be an additional risk factor for HCC.
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Affiliation(s)
- Philippe Couvert
- Inserm U939, Dyslipidemia, Inflammation and Atherosclerosis in metabolic diseases, 75013 Paris, France
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Abifadel M, Guerin M, Benjannet S, Rabès JP, Le Goff W, Julia Z, Hamelin J, Carreau V, Varret M, Bruckert E, Tosolini L, Meilhac O, Couvert P, Bonnefont-Rousselot D, Chapman J, Carrié A, Michel JB, Prat A, Seidah NG, Boileau C. Identification and characterization of new gain-of-function mutations in the PCSK9 gene responsible for autosomal dominant hypercholesterolemia. Atherosclerosis 2012; 223:394-400. [PMID: 22683120 DOI: 10.1016/j.atherosclerosis.2012.04.006] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2011] [Revised: 04/13/2012] [Accepted: 04/19/2012] [Indexed: 01/19/2023]
Abstract
BACKGROUND The identification of mutations in PCSK9 (proprotein convertase subtilisin kexin9) in autosomal dominant hypercholesterolemia (ADH), has revealed the existence of a new player in cholesterol homeostasis. PCSK9 has been shown to enhance the degradation of the LDL receptor (LDLR) at the cell surface. Gain-of-function mutations of PCSK9 induce ADH and are very rare, but their identification is crucial in studying PCSK9's role in hypercholesterolemia, its detailed trafficking pathway and its impact on the LDLR. METHODS In order to identify new mutations and understand the exact mechanisms of action of mutated PCSK9, PCSK9 was sequenced in 75 ADH patients with no mutations in the LDLR or APOB genes. Functional analyses in cell culture were conducted and the impact of novel PCSK9 mutations on the quantitative and qualitative features of lipoprotein particles and on the HDL-mediated cellular cholesterol efflux was studied. RESULTS Among these 75 ADH probands with no mutations in the LDLR or APOB genes, four gain-of-function mutations of PCSK9 were identified, of which two were novel: the p.Leu108Arg and the p.Asp35Tyr substitutions. In vitro studies of their consequences on the activity of PCSK9 on cell surface levels of LDLR showed that the p.Leu108Arg mutation clearly results in a gain-of-function, while the p.Asp35Tyr mutation created a novel Tyr-sulfation site, which may enhance the intracellular activity of PCSK9. CONCLUSION These data further contribute to the characterization of PCSK9 mutations and to better understanding of the impact on cholesterol metabolism of this new therapeutic target.
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Affiliation(s)
- Marianne Abifadel
- Institut National de la Santé et de la Recherche Médicale, Inserm UMR698, Hemostasis, Bio-Engineering and Cardiovascular Remodelling, Hôpital Bichat-Claude Bernard, 46 Rue Henri Huchard, 75877 Paris Cedex 18, France.
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Zyss J, Béhin A, Couvert P, Bouhour F, Sassolas A, Kolev I, Denys V, Vial C, Lacour A, Carrié A, Stojkovic T. Clinical and electrophysiological characteristics of neuropathy associated with Tangier disease. J Neurol 2011; 259:1222-6. [DOI: 10.1007/s00415-011-6340-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2011] [Revised: 11/23/2011] [Accepted: 11/24/2011] [Indexed: 01/23/2023]
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Couvert P, Carrié A. Génétique et HDL : anomalies rares héréditaires. Archives of Cardiovascular Diseases Supplements 2011. [DOI: 10.1016/s1878-6480(11)70783-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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24
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Androdias G, Vukusic S, Gignoux L, Boespflug-Tanguy O, Acquaviva C, Zabot MT, Couvert P, Carrie A, Confavreux C, Labauge P. Leukodystrophy with a cerebellar cystic aspect and intracranial atherosclerosis: an atypical presentation of cerebrotendinous xanthomatosis. J Neurol 2011. [PMID: 21769531 DOI: 10.1007/s00415‐011‐6167‐x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Androdias G, Vukusic S, Gignoux L, Boespflug-Tanguy O, Acquaviva C, Zabot MT, Couvert P, Carrie A, Confavreux C, Labauge P. Leukodystrophy with a cerebellar cystic aspect and intracranial atherosclerosis: an atypical presentation of cerebrotendinous xanthomatosis. J Neurol 2011; 259:364-6. [PMID: 21769531 DOI: 10.1007/s00415-011-6167-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2011] [Revised: 06/29/2011] [Accepted: 07/02/2011] [Indexed: 12/26/2022]
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Couvert P, Chapman MJ, Carrié A. Impact of genetic variation in the SLCO1B1 gene on statin efficacy in low-density lipoprotein cholesterol-lowering therapy. Pharmacogenomics 2011; 12:137-9. [PMID: 21332305 DOI: 10.2217/pgs.10.214] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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27
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AbiFadel M, Rabès JP, Guérin M, Carreau V, Carrié A, Varret M, Samson-Bouma ME, Tosolini L, Erlich D, Couvert P, Bonnefont-Rousselot D, Bruckert E, Prat A, Seidah N, Boileau C. 43 NEW GAIN OF FUNCTIONS MUTATIONS IN PCSK9 AND THEIR IMPACT IN FAMILIAL HYPERCHOLESTEROLEMIA. ATHEROSCLEROSIS SUPP 2011. [DOI: 10.1016/s1567-5688(11)70044-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Giral P, Ratziu V, Couvert P, Carrié A, Kontush A, Girerd X, Chapman MJ. Plasma bilirubin and gamma-glutamyltransferase activity are inversely related in dyslipidemic patients with metabolic syndrome: Relevance to oxidative stress. Atherosclerosis 2010; 210:607-13. [DOI: 10.1016/j.atherosclerosis.2009.12.026] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2009] [Revised: 12/15/2009] [Accepted: 12/18/2009] [Indexed: 12/20/2022]
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AbiFadel M, Rabès JP, Varret M, Samson-Bouma ME, Bruckert E, Devillers M, Carreau V, Tosolini L, Marduel M, Marques A, Couvert P, Bonnefont-Rousselot D, Guérin M, Carrié A, Prat A, Seidah N, Boileau C. MS91 PCSK9: FROM GENE AND VARIANTS TO PROTEIN AND PLASMA LEVELS. ATHEROSCLEROSIS SUPP 2010. [DOI: 10.1016/s1567-5688(10)70592-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Pichit P, Quillard M, Couvert P, Sénant J, Carrié A, Bittar R, Hannequin D, Guyant-Maréchal L. Tangier disease phenotype diversity in dizygous twin sisters. Rev Neurol (Paris) 2010; 166:534-7. [DOI: 10.1016/j.neurol.2009.12.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2009] [Revised: 10/09/2009] [Accepted: 12/04/2009] [Indexed: 11/17/2022]
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Larrede S, Quinn CM, Jessup W, Frisdal E, Olivier M, Hsieh V, Kim MJ, Van Eck M, Couvert P, Carrie A, Giral P, Chapman MJ, Guerin M, Le Goff W. Stimulation of Cholesterol Efflux by LXR Agonists in Cholesterol-Loaded Human Macrophages Is ABCA1-Dependent but ABCG1-Independent. Arterioscler Thromb Vasc Biol 2009; 29:1930-6. [DOI: 10.1161/atvbaha.109.194548] [Citation(s) in RCA: 155] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Sandra Larrede
- From INSERM, UMR S939 (S.L., E.F., M.O., P.C., A.C., P.G., M.J.C., M.G., W.L.G.), Paris, France; Université Pierre et Marie Curie–Paris6 (S.L., E.F., M.O., P.C., A.C., P.G., M.J.C., M.G., W.L.G.), UMR S939 Paris, France; AP-HP, Groupe hospitalier Pitié-Salpétrière, Service de Biochimie Endocrinienne et Oncologique (P.C., A.C.) and Service d’Endocrinologie-Métabolisme (P.G.), Paris, France; the Centre for Vascular Research (C.M.Q., W.J., V.H., M.-J.K.), School of Medical Sciences, University of
| | - Carmel M. Quinn
- From INSERM, UMR S939 (S.L., E.F., M.O., P.C., A.C., P.G., M.J.C., M.G., W.L.G.), Paris, France; Université Pierre et Marie Curie–Paris6 (S.L., E.F., M.O., P.C., A.C., P.G., M.J.C., M.G., W.L.G.), UMR S939 Paris, France; AP-HP, Groupe hospitalier Pitié-Salpétrière, Service de Biochimie Endocrinienne et Oncologique (P.C., A.C.) and Service d’Endocrinologie-Métabolisme (P.G.), Paris, France; the Centre for Vascular Research (C.M.Q., W.J., V.H., M.-J.K.), School of Medical Sciences, University of
| | - Wendy Jessup
- From INSERM, UMR S939 (S.L., E.F., M.O., P.C., A.C., P.G., M.J.C., M.G., W.L.G.), Paris, France; Université Pierre et Marie Curie–Paris6 (S.L., E.F., M.O., P.C., A.C., P.G., M.J.C., M.G., W.L.G.), UMR S939 Paris, France; AP-HP, Groupe hospitalier Pitié-Salpétrière, Service de Biochimie Endocrinienne et Oncologique (P.C., A.C.) and Service d’Endocrinologie-Métabolisme (P.G.), Paris, France; the Centre for Vascular Research (C.M.Q., W.J., V.H., M.-J.K.), School of Medical Sciences, University of
| | - Eric Frisdal
- From INSERM, UMR S939 (S.L., E.F., M.O., P.C., A.C., P.G., M.J.C., M.G., W.L.G.), Paris, France; Université Pierre et Marie Curie–Paris6 (S.L., E.F., M.O., P.C., A.C., P.G., M.J.C., M.G., W.L.G.), UMR S939 Paris, France; AP-HP, Groupe hospitalier Pitié-Salpétrière, Service de Biochimie Endocrinienne et Oncologique (P.C., A.C.) and Service d’Endocrinologie-Métabolisme (P.G.), Paris, France; the Centre for Vascular Research (C.M.Q., W.J., V.H., M.-J.K.), School of Medical Sciences, University of
| | - Maryline Olivier
- From INSERM, UMR S939 (S.L., E.F., M.O., P.C., A.C., P.G., M.J.C., M.G., W.L.G.), Paris, France; Université Pierre et Marie Curie–Paris6 (S.L., E.F., M.O., P.C., A.C., P.G., M.J.C., M.G., W.L.G.), UMR S939 Paris, France; AP-HP, Groupe hospitalier Pitié-Salpétrière, Service de Biochimie Endocrinienne et Oncologique (P.C., A.C.) and Service d’Endocrinologie-Métabolisme (P.G.), Paris, France; the Centre for Vascular Research (C.M.Q., W.J., V.H., M.-J.K.), School of Medical Sciences, University of
| | - Victar Hsieh
- From INSERM, UMR S939 (S.L., E.F., M.O., P.C., A.C., P.G., M.J.C., M.G., W.L.G.), Paris, France; Université Pierre et Marie Curie–Paris6 (S.L., E.F., M.O., P.C., A.C., P.G., M.J.C., M.G., W.L.G.), UMR S939 Paris, France; AP-HP, Groupe hospitalier Pitié-Salpétrière, Service de Biochimie Endocrinienne et Oncologique (P.C., A.C.) and Service d’Endocrinologie-Métabolisme (P.G.), Paris, France; the Centre for Vascular Research (C.M.Q., W.J., V.H., M.-J.K.), School of Medical Sciences, University of
| | - Mi-Jurng Kim
- From INSERM, UMR S939 (S.L., E.F., M.O., P.C., A.C., P.G., M.J.C., M.G., W.L.G.), Paris, France; Université Pierre et Marie Curie–Paris6 (S.L., E.F., M.O., P.C., A.C., P.G., M.J.C., M.G., W.L.G.), UMR S939 Paris, France; AP-HP, Groupe hospitalier Pitié-Salpétrière, Service de Biochimie Endocrinienne et Oncologique (P.C., A.C.) and Service d’Endocrinologie-Métabolisme (P.G.), Paris, France; the Centre for Vascular Research (C.M.Q., W.J., V.H., M.-J.K.), School of Medical Sciences, University of
| | - Miranda Van Eck
- From INSERM, UMR S939 (S.L., E.F., M.O., P.C., A.C., P.G., M.J.C., M.G., W.L.G.), Paris, France; Université Pierre et Marie Curie–Paris6 (S.L., E.F., M.O., P.C., A.C., P.G., M.J.C., M.G., W.L.G.), UMR S939 Paris, France; AP-HP, Groupe hospitalier Pitié-Salpétrière, Service de Biochimie Endocrinienne et Oncologique (P.C., A.C.) and Service d’Endocrinologie-Métabolisme (P.G.), Paris, France; the Centre for Vascular Research (C.M.Q., W.J., V.H., M.-J.K.), School of Medical Sciences, University of
| | - Philippe Couvert
- From INSERM, UMR S939 (S.L., E.F., M.O., P.C., A.C., P.G., M.J.C., M.G., W.L.G.), Paris, France; Université Pierre et Marie Curie–Paris6 (S.L., E.F., M.O., P.C., A.C., P.G., M.J.C., M.G., W.L.G.), UMR S939 Paris, France; AP-HP, Groupe hospitalier Pitié-Salpétrière, Service de Biochimie Endocrinienne et Oncologique (P.C., A.C.) and Service d’Endocrinologie-Métabolisme (P.G.), Paris, France; the Centre for Vascular Research (C.M.Q., W.J., V.H., M.-J.K.), School of Medical Sciences, University of
| | - Alain Carrie
- From INSERM, UMR S939 (S.L., E.F., M.O., P.C., A.C., P.G., M.J.C., M.G., W.L.G.), Paris, France; Université Pierre et Marie Curie–Paris6 (S.L., E.F., M.O., P.C., A.C., P.G., M.J.C., M.G., W.L.G.), UMR S939 Paris, France; AP-HP, Groupe hospitalier Pitié-Salpétrière, Service de Biochimie Endocrinienne et Oncologique (P.C., A.C.) and Service d’Endocrinologie-Métabolisme (P.G.), Paris, France; the Centre for Vascular Research (C.M.Q., W.J., V.H., M.-J.K.), School of Medical Sciences, University of
| | - Philippe Giral
- From INSERM, UMR S939 (S.L., E.F., M.O., P.C., A.C., P.G., M.J.C., M.G., W.L.G.), Paris, France; Université Pierre et Marie Curie–Paris6 (S.L., E.F., M.O., P.C., A.C., P.G., M.J.C., M.G., W.L.G.), UMR S939 Paris, France; AP-HP, Groupe hospitalier Pitié-Salpétrière, Service de Biochimie Endocrinienne et Oncologique (P.C., A.C.) and Service d’Endocrinologie-Métabolisme (P.G.), Paris, France; the Centre for Vascular Research (C.M.Q., W.J., V.H., M.-J.K.), School of Medical Sciences, University of
| | - M. John Chapman
- From INSERM, UMR S939 (S.L., E.F., M.O., P.C., A.C., P.G., M.J.C., M.G., W.L.G.), Paris, France; Université Pierre et Marie Curie–Paris6 (S.L., E.F., M.O., P.C., A.C., P.G., M.J.C., M.G., W.L.G.), UMR S939 Paris, France; AP-HP, Groupe hospitalier Pitié-Salpétrière, Service de Biochimie Endocrinienne et Oncologique (P.C., A.C.) and Service d’Endocrinologie-Métabolisme (P.G.), Paris, France; the Centre for Vascular Research (C.M.Q., W.J., V.H., M.-J.K.), School of Medical Sciences, University of
| | - Maryse Guerin
- From INSERM, UMR S939 (S.L., E.F., M.O., P.C., A.C., P.G., M.J.C., M.G., W.L.G.), Paris, France; Université Pierre et Marie Curie–Paris6 (S.L., E.F., M.O., P.C., A.C., P.G., M.J.C., M.G., W.L.G.), UMR S939 Paris, France; AP-HP, Groupe hospitalier Pitié-Salpétrière, Service de Biochimie Endocrinienne et Oncologique (P.C., A.C.) and Service d’Endocrinologie-Métabolisme (P.G.), Paris, France; the Centre for Vascular Research (C.M.Q., W.J., V.H., M.-J.K.), School of Medical Sciences, University of
| | - Wilfried Le Goff
- From INSERM, UMR S939 (S.L., E.F., M.O., P.C., A.C., P.G., M.J.C., M.G., W.L.G.), Paris, France; Université Pierre et Marie Curie–Paris6 (S.L., E.F., M.O., P.C., A.C., P.G., M.J.C., M.G., W.L.G.), UMR S939 Paris, France; AP-HP, Groupe hospitalier Pitié-Salpétrière, Service de Biochimie Endocrinienne et Oncologique (P.C., A.C.) and Service d’Endocrinologie-Métabolisme (P.G.), Paris, France; the Centre for Vascular Research (C.M.Q., W.J., V.H., M.-J.K.), School of Medical Sciences, University of
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Couvert P, Giral P, Dejager S, Gu J, Huby T, Chapman MJ, Bruckert E, Carrié A. Association between a frequent allele of the gene encoding OATP1B1 and enhanced LDL-lowering response to fluvastatin therapy. Pharmacogenomics 2009; 9:1217-27. [PMID: 18781850 DOI: 10.2217/14622416.9.9.1217] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
INTRODUCTION Marked lowering of low-density-lipoprotein cholesterol (LDL-C) levels (< or =50%) with intensive statin therapy is associated with major reduction in cardiovascular risk, but is limited by a potential increase in adverse effects, thereby justifying optimization of LDL-C reduction with minimal risk. The organic anion transporting polypeptide-1B1 encoded by the SLCO1B1 gene is implicated as a major transporter in cellular uptake of statins, and notably fluvastatin. We postulated that genetic variation in SLCO1B1 might affect statin bioavailability, and might therefore influence drug response and potential adverse effects. MATERIALS & METHODS Elderly hypercholesterolemic subjects (n = 724), whose plasma lipid profile was determined before and 2 months after fluvastatin extended-release treatment (80 mg/day, n = 420), or placebo (n = 304), were genotyped for the most frequent nonsynonymous polymorphisms (SNP) in the SLCO1B1 gene (c.388A>G, c.463C>A and c.521T>C). RESULTS Due to linkage disequilibrium, only four alleles (*1b, *5, *14 and *15) of SLCO1B1 were detected in addition to the wild-type allele (*1a). The c.463A genotype, which was systematically associated with the c.388G SNP corresponding to the *14 allele was significantly associated with percentage LDL-C reduction from baseline (p = 0.005) and with mean post-treatment LDL-C values (p = 0.0005). Subjects homozygous for the c.463C genotype (n = 294) exhibited significantly less LDL-C reduction and higher post-treatment LDL-C levels (-31.5%, 138 mg/dl) relative to heterozygous C/A patients (-36.2%, 126 mg/dl; n = 111), and to homozygous A/A subjects (-41%, 115 mg/dl; n = 15). CONCLUSIONS These results reveal that OATP1B1 is implicated in the pharmacological action and efficacy of fluvastatin. Indeed, the common *14 allele, which is distinguished by the presence of the c.463C>A polymorphism, was associated with enhanced lipid-lowering efficacy in this study.
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Affiliation(s)
- Philippe Couvert
- INSERM, UMR S551, Dyslipoproteinemia and Atherosclerosis Research Unit, Hôpital de la Pitié, F-75013, Paris, France
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Couvert P, Carrié A, Pariès J, Vaysse J, Miroglio A, Kerjean A, Nahon P, Chelly J, Trinchet JC, Beaugrand M, Ganne-Carrié N. Liver insulin-like growth factor 2 methylation in hepatitis C virus cirrhosis and further occurrence of hepatocellular carcinoma. World J Gastroenterol 2008; 14:5419-27. [PMID: 18803353 PMCID: PMC2744164 DOI: 10.3748/wjg.14.5419] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To assess the predictive value of the insulin-like growth factor 2 (Igf2) methylation profile for the occurrence of Hepatocellular Carcinoma (HCC) in hepatitis C (HCV) cirrhosis.
METHODS: Patients with: (1) biopsy-proven compensated HCV cirrhosis; (2) available baseline frozen liver sample; (3) absence of detectable HCC; (4) regular screening for HCC; (5) informed consent for genetic analysis were studied. After DNA extraction from liver samples and bisulfite treatment, unbiased PCR and DHPLC analysis were performed for methylation analysis at the Igf2 locus. The predictive value of the Igf2 methylation profile for HCC was assessed by Kaplan-Meier and Cox methods.
RESULTS: Among 94 included patients, 20 developed an HCC during follow-up (6.9 ± 3.2 years). The methylation profile was hypomethylated, intermediate and hypermethylated in 13, 64 and 17 cases, respectively. In univariate analysis, two baseline parameters were associated with the occurrence of HCC: age (P = 0.01) and prothrombin (P = 0.04). The test of linear tendency between the three ordered levels of Igf2 methylation and probability of HCC occurrence was significant (Log Rank, P = 0.043; Breslow, P = 0.037; Tarone-Ware, P = 0.039).
CONCLUSION: These results suggest that hypome-thylation at the Igf2 locus in the liver could be predictive for HCC occurrence in HCV cirrhosis.
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Prieur X, Huby T, Rodríguez JC, Couvert P, Chapman MJ. Apolipoprotein AV: gene expression, physiological role in lipid metabolism and clinical relevance. ACTA ACUST UNITED AC 2008. [DOI: 10.2217/17460875.3.4.371] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Théaudin M, Couvert P, Fournier E, Bouige D, Bruckert E, Perrotte P, Vaschalde Y, Maisonobe T, Bonnefont-Rousselot D, Carrié A, Le Forestier N. Lewis-Sumner Syndrome and Tangier Disease. ACTA ACUST UNITED AC 2008; 65:968-70. [DOI: 10.1001/archneur.65.7.968] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Nahon P, Sutton A, Rufat P, Ziol M, Thabut G, Schischmanoff PO, Vidaud D, Charnaux N, Couvert P, Ganne-Carrie N, Trinchet JC, Gattegno L, Beaugrand M. Liver iron, HFE gene mutations, and hepatocellular carcinoma occurrence in patients with cirrhosis. Gastroenterology 2008; 134:102-10. [PMID: 18061182 DOI: 10.1053/j.gastro.2007.10.038] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2007] [Accepted: 10/11/2007] [Indexed: 02/07/2023]
Abstract
BACKGROUND & AIMS The influence of HFE gene mutations and liver iron overload on hepatocellular carcinoma (HCC) occurrence in patients with cirrhosis is subjected to controversial results. The aim of this work was to clarify this influence in a large cohort of prospectively followed-up cirrhotic patients classified according to the cause of their liver disease. METHODS Three hundred one consecutive cirrhotic patients (162 alcoholics and 139 HCV-infected patients) were included at time of diagnosis of cirrhosis and followed-up. Liver iron overload on initial biopsy according to modified Deugnier's score and C282Y/H63D HFE gene mutations were assessed. RESULTS In patients with alcoholic cirrhosis (mean iron score, 2.0 +/- 3.0; mean time of follow-up, 66.1 +/- 45.1 months), 40 (24.6%) developed HCC. Thirteen (8.02%) were heterozygotes for C282Y HFE gene mutation and had higher hepatic iron scores (3.6 +/- 3.8 vs 1.9 +/- 2.8, respectively, P = .05). In univariate analysis, liver iron overload as a continuous variable (HR, 1.23 [1.13-1.34], P < .001) or in binary coding with an optimal threshold of iron score >/=2.0 (HR, 4.1 [2.1-7.3], P < .0001) and C282Y mutation carriage (HR, 2.7 [1.2-6.3], P = .01) were risk factors for HCC. In multivariate analysis, liver iron and C282Y mutation carriage remained independent risk factors for HCC. In patients with HCV-related cirrhosis (C282Y mutation carriage, 17 [12.23%]; mean liver iron score, 0.9 +/- 1.9; mean time of follow-up, 85.5 +/- 42.1 months; HCC, 63 [45.32%] patients), C282Y mutation carriage and liver iron were not associated with HCC occurrence. CONCLUSIONS Liver iron overload and C282Y mutation are associated with a higher risk of HCC in patients with alcoholic but not HCV-related cirrhosis.
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Affiliation(s)
- Pierre Nahon
- Service d'Hépato-gastroentérologie, Hôpital Jean Verdier, Assistance Publique-Hôpitaux de Paris, Bondy, France
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Berthier S, Chazette P, Couvert P, Pelon J, Dulac F, Thieuleux F, Moulin C, Pain T. Desert dust aerosol columnar properties over ocean and continental Africa from Lidar in-Space Technology Experiment (LITE) and Meteosat synergy. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2005jd006999] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Poirier K, Chalas C, Tissier F, Couvert P, Mallet V, Carrié A, Marchio A, Sarli D, Gicquel C, Chaussade S, Beljord C, Chelly J, Kerjean A, Terris B. Loss of parental-specific methylation at the IGF2 locus in human hepatocellular carcinoma. J Pathol 2004; 201:473-9. [PMID: 14595760 DOI: 10.1002/path.1477] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [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: 12/12/2022]
Abstract
Significant production of the growth factor IGF2 has been reported in human hepatocellular carcinomas (HCCs). Disturbances associated with changes in methylation at this locus or affecting the 11p15.5 imprinting domain as a whole can be postulated in HCCs. In the present study, the methylation status of differentially methylated regions of the imprinted genes TSSC5, LIT1, and IGF2, which span the 11p15 domain, was analysed in 71 liver tissues from virus-associated and non-virus-associated HCCs compared with six normal liver tissues. Altered methylation of TSSC5 and LIT1 was observed in only 6% and 8% of HCCs, respectively, compared with 89% at the IGF2 locus, suggesting that these loci were not concomitantly dysregulated. These observations suggest that loss of parental-specific methylation at the IGF2 locus may be specifically associated with HCC, whether virus-associated or non-virus-associated, and arising in cirrhotic or non-cirrhotic livers.
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Affiliation(s)
- Karine Poirier
- GDPM-Institut Cochin-INSERM-CNRS-Université Paris V-CHU Cochin, 24 Rue du Faubourg Saint-Jacques, 75014 Paris, France
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Gomot M, Gendrot C, Verloes A, Raynaud M, David A, Yntema HG, Dessay S, Kalscheuer V, Frints S, Couvert P, Briault S, Blesson S, Toutain A, Chelly J, Desportes V, Moraine C. MECP2 gene mutations in non-syndromic X-linked mental retardation: Phenotype-genotype correlation. ACTA ACUST UNITED AC 2003; 123A:129-39. [PMID: 14598336 DOI: 10.1002/ajmg.a.20247] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [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: 11/10/2022]
Abstract
Non-syndromic X-linked mental retardation (MRX) is a frequent cause of inherited mental retardation. It is a heterogeneous condition in which the first 12 genes discovered to date explain no more than 15% of the MRX situations ascertained by recurrence in multiplex families. In Rett syndrome (RTT), an X-linked dominant condition mostly sporadic and usually lethal in males, most affected females have been shown to be mutated in the Methyl-CpG binding protein 2 gene (MECP2) that maps at Xq28. Some mentally retarded males related to RTT females carry the same mutation. Several MRX families mapping to Xq28 were subsequently tested for MECP2 and a causative mutation was discovered in three families, suggesting that it could be one of the main genes involved in MRX. We report here the corresponding phenotypes in these three families of increasing severity. In family 1, an in-frame deletion DeltaP387-M466 was found in the 3' region. The patients had severe to mild non-progressive MR, with better motor skills than verbal abilities. In family 2, an Arg to Trp substitution (R167W) was found between the transcription repression domain (TRD) and the methyl binding domain (MBD). The patients had brisk reflexes and essential tremor with mild and non-progressive MR, poor motor co-ordination and written language difficulties. In the third family (MRX16), a Glu to Gly substitution (E137G) was found in the MBD. The patients had manifestations similar to those of family 2, but MR was mild to moderate, speech articulation was poor and some had verbal stereotypies. Regression of language skills was suspected in three patients. Phenotype-genotype correlation could thus be suspected and is discussed in these three families.
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Affiliation(s)
- Marie Gomot
- Service de Génétique, CHU Bretomeau, INSERM U316, 2 boulevard Tonnellé, 37044 Tours cedex, France.
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Kerjean A, Couvert P, Heams T, Chalas C, Poirier K, Chelly J, Jouannet P, Paldi A, Poirot C. In vitro follicular growth affects oocyte imprinting establishment in mice. Eur J Hum Genet 2003; 11:493-6. [PMID: 12825069 DOI: 10.1038/sj.ejhg.5200990] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.9] [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: 11/09/2022] Open
Abstract
In vitro folliculogenesis of cryopreserved ovarian tissue could be an effective method for insuring fertility for patients who receive gonadotoxic treatment. Although several culture systems have been described for growing female gametes in vitro, the production of competent oocytes for further development remains a considerable challenge. The purpose of our study was to determine whether maternal primary imprinting progresses normally during mouse oocyte growth in vitro. We analysed the DNA methylation status of differentially methylated regions of the imprinted genes H19, Mest/Peg1 and Igf2R using fully grown germinal vesicle-stage oocytes (fg oocytes) produced by in vitro folliculogenesis from early preantral follicles. When compared to fg oocytes removal from control females, we observed after in vitro development, a loss of methylation at the Igf2R locus in six out of seven independent experiments and Mest/Peg1 locus (one out of seven), and a gain of methylation at the H19 locus (one out of seven). These results provide insight into the dysregulation of the process of primary imprinting during oocyte growth in vitro and highlight the need for effective new biomarkers to identify complete nuclear reprogramming competence after in vitro folliculogenesis.
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Affiliation(s)
- Antoine Kerjean
- GDPM, Institut Cochin, INSERM, CNRS-Université Paris V and CHU Cochin, 24 rue du Faubourg Saint-Jacques, 75014 Paris, France.
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Couvert P, Poirier K, Carrié A, Chalas C, Jouannet P, Beldjord C, Bienvenu T, Chelly J, Kerjean A. DHPLC-based method for DNA methylation analysis of differential methylated regions from imprinted genes. Biotechniques 2003; 34:356-62. [PMID: 12613258 DOI: 10.2144/03342rr06] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [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: 11/23/2022] Open
Abstract
The bisulfite genomic sequencing method is one of the most widely used techniques for methylation analysis in heterogeneous unbiased PCR, amplifying for both methylated and unmethylated alleles simultaneously. However, it requires labor-intensive and time-consuming cloning and sequencing steps. In the current study, we used a denaturing high-performance liquid chromatography (DHPLC) procedure in a complementary way with the bisulfite genomic sequencing to analyze the methylation of differentially methylated regions (DMRs) of imprinted genes. We showed reliable and reproducible results in distinguishing overall methylation profiles of DMRs regions of human SNRPN, H19, MEST/PEG1, LIT1, IGF2, TSSC5, WT1 antisense, and mouse H19, Mest/Peg1, Igf2R imprinted genes. These DHPLC profiles were in accordance with bisulfite genomic sequencing data and may serve as a type of "fingerprint," revealing the overall methylation status of DMRs associated with sample heterogeneity. We conclude that DHPLC analysis could be used to increase the throughput efficiency of methylation pattern analysis of imprinted genes after the bisulfite conversion of genomic DNA and unbiased PCR amplification.
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Affiliation(s)
- P Couvert
- Université Paris V-CHU Cochin, Paris, France
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Benchoua A, Couriaud C, Guégan C, Tartier L, Couvert P, Friocourt G, Chelly J, Ménissier-de Murcia J, Onténiente B. Active caspase-8 translocates into the nucleus of apoptotic cells to inactivate poly(ADP-ribose) polymerase-2. J Biol Chem 2002; 277:34217-22. [PMID: 12065591 DOI: 10.1074/jbc.m203941200] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.8] [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: 11/06/2022] Open
Abstract
Caspase-8 is the prototypic initiator of the death domain receptor pathway of apoptosis. Here, we report that caspase-8 not only triggers and amplifies the apoptotic process at cytoplasmic sites but can also act as an executioner at nuclear levels. In a murine model of acute ischemia, caspase-8 is relocated into the nucleus of apoptotic neurons, where it cleaves PARP-2, a member of the poly(ADP-ribose) polymerase family involved in DNA repair. As indicated by site-directed mutagenesis, PARP-2 cleavage occurs preferentially at the LQMD sequence mapped between the DNA binding and the catalytic domains of the protein. This is close to the cleavage sequence found in Bid, the cytoplasmic target of caspase-8. Activity assays confirm that cleavage of PARP-2 results in inactivation of its poly(ADP-ribosylation) property, proportional to the efficiency of the cleavage. Our findings add to the complexity of proteolytic caspase networks by demonstrating that caspase-8 is in turn an initiator, amplifier, and effector caspase.
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Affiliation(s)
- Alexandra Benchoua
- INSERM U 421, Université Paris Val-de-Marne, 8 rue du General Sarrail, F-94010 Créteil cedex, France
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Bienvenu T, Poirier K, Friocourt G, Bahi N, Beaumont D, Fauchereau F, Ben Jeema L, Zemni R, Vinet MC, Francis F, Couvert P, Gomot M, Moraine C, van Bokhoven H, Kalscheuer V, Frints S, Gecz J, Ohzaki K, Chaabouni H, Fryns JP, Desportes V, Beldjord C, Chelly J. ARX, a novel Prd-class-homeobox gene highly expressed in the telencephalon, is mutated in X-linked mental retardation. Hum Mol Genet 2002; 11:981-91. [PMID: 11971879 DOI: 10.1093/hmg/11.8.981] [Citation(s) in RCA: 216] [Impact Index Per Article: 9.8] [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: 11/12/2022] Open
Abstract
Investigation of a critical region for an X-linked mental retardation (XLMR) locus led us to identify a novel Aristaless related homeobox gene (ARX ). Inherited and de novo ARX mutations, including missense mutations and in frame duplications/insertions leading to expansions of polyalanine tracts in ARX, were found in nine familial and one sporadic case of MR. In contrast to other genes involved in XLMR, ARX expression is specific to the telencephalon and ventral thalamus. Notably there is an absence of expression in the cerebellum throughout development and also in adult. The absence of detectable brain malformations in patients suggests that ARX may have an essential role, in mature neurons, required for the development of cognitive abilities.
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Bienvenu T, Souville I, Poirier K, Aquaviva C, Burglen L, Amiel J, Héron B, Kaminska A, Couvert P, Beldjord C, Chelly J. Five novel frameshift mutations in exon 3 and 4 of the MECP2 gene identified in Rett patients: Consequences for the molecular diagnosis strategy. Hum Mutat 2001; 18:251-2. [PMID: 11524737 DOI: 10.1002/humu.1182] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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: 11/11/2022]
Abstract
Rett syndrome (RTT) is a severe progressive neurological disorder that affects almost exclusively females. The gene responsible for this disorder, MECP2, was recently identified by candidate gene strategy. Mutations were detected in 70-85% of RTT cases. We report here five novel frameshift mutations (named 345delC, 895del202, 989ins18del8, 996insAG and 1124del53) in exon 3 and 4 of the MECP2 gene. To avoid the missing of few small deletions in RTT patients using classical mutation screening approaches, we suggest that screening of the mutations in the MECP2 gene in RTT girls should include at least a large PCR to amplify exon 4 entirely.
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Affiliation(s)
- T Bienvenu
- Laboratoire de Biochimie et Génétique Moléculaire and INSERM U129-ICGM, Hôpital Cochin, 123 boulevard de Port-Royal, 75014 Paris, France.
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Couvert P, Bienvenu T, Aquaviva C, Poirier K, Moraine C, Gendrot C, Verloes A, Andrès C, Le Fevre AC, Souville I, Steffann J, des Portes V, Ropers HH, Yntema HG, Fryns JP, Briault S, Chelly J, Cherif B. MECP2 is highly mutated in X-linked mental retardation. Hum Mol Genet 2001; 10:941-6. [PMID: 11309367 DOI: 10.1093/hmg/10.9.941] [Citation(s) in RCA: 198] [Impact Index Per Article: 8.6] [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: 11/13/2022] Open
Abstract
Following the recent discovery that the methyl-CpG binding protein 2 (MECP2) gene located on Xq28 is involved in Rett syndrome (RTT), a wild spectrum of phenotypes, including mental handicap, has been shown to be associated with mutations in MECP2. These findings, with the compelling genetic evidence suggesting the presence in Xq28 of additional genes besides RabGDI1 and FMR2 involved in non-specific X-linked mental retardation (MRX), prompted us to investigate MECP2 in MRX families. Two novel mutations, not found in RTT, were identified. The first mutation, an E137G, was identified in the MRX16 family, and the second, R167W, was identified in a new mental retardation (MR) family shown to be linked to Xq28. In view of these data, we screened MECP2 in a cohort of 185 patients found negative for the expansions across the FRAXA CGG repeat and reported the identification of mutations in four sporadic cases of MR. One of the mutations, A140V, which we found in two patients, has been described previously, whereas the two others, P399L and R453Q, are novel mutations. In addition to the results demonstrating the involvement of MECP2 in MRX, this study shows that the frequency of mutations in MECP2 in the mentally retarded population screened for the fragile X syndrome is comparable to the frequency of the CGG expansions in FMR1. Therefore, implementation of systematic screening of MECP2 in MR patients should result in significant progress in the field of molecular diagnosis and genetic counseling of mental handicap.
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Affiliation(s)
- P Couvert
- INSERM Unité 129-ICGM, CHU Cochin 24 Rue du Faubourg Saint Jacques, 75014 Paris, France
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Girard M, Couvert P, Carrié A, Tardieu M, Chelly J, Beldjord C, Bienvenu T. Parental origin of de novo MECP2 mutations in Rett syndrome. Eur J Hum Genet 2001; 9:231-6. [PMID: 11313764 DOI: 10.1038/sj.ejhg.5200618] [Citation(s) in RCA: 87] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2000] [Revised: 11/22/2000] [Accepted: 11/27/2000] [Indexed: 11/08/2022] Open
Abstract
Rett syndrome (RTT) is a neurodevelopmental disorder occurring almost exclusively in females as sporadic cases. Recently, DNA mutations in the MECP2 gene have been detected in approximately 70% of patients with RTT. To explain the sex-limited expression of RTT, it has been suggested that de novo X-linked mutations occur exclusively in male germ cells resulting therefore only in affected daughters. To test this hypothesis, we have analysed 19 families with RTT syndrome due to MECP2 molecular defects. In seven informative families we have found by DHPLC a nucleotide variant which could be used to differentiate between the maternal and the paternal allele. In each subject investigated from these families, we have amplified specifically each allele and sequenced allele-specific PCR products to identify the allele bearing the mutation as well as the parental origin of each X chromosome. This approach allowed us to determine the parental origin of de novo mutations in all informative families. In five cases, the de novo MECP2 mutations have a paternal origin and in the two other cases a maternal origin. In all transitions at CpG, the de novo mutation observed was of paternal origin. The high frequency of male germ-line transmission of the mutation (71% of RTT informative cases) is consistent with a predominant occurrence of the disease in females.
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Affiliation(s)
- M Girard
- Laboratoire de Génétique et Physiopathologie des retards mentaux-ICGM, Faculté de Médecine Cochin, 24 rue du Faubourg Saint Jacques, 75014 Paris, France
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Bienvenu T, des Portes V, McDonell N, Carrié A, Zemni R, Couvert P, Ropers HH, Moraine C, van Bokhoven H, Fryns JP, Allen K, Walsh CA, Boué J, Kahn A, Chelly J, Beldjord C. Missense mutation in PAK3, R67C, causes X-linked nonspecific mental retardation. Am J Med Genet 2000; 93:294-8. [PMID: 10946356 DOI: 10.1002/1096-8628(20000814)93:4<294::aid-ajmg8>3.0.co;2-f] [Citation(s) in RCA: 111] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
X-linked mental retardation is a very common condition that affects approximately 1 in 600 males. Despite recent progress, in most cases the molecular defects underlying this disorder remain unknown. Recently, a study using the candidate gene approach demonstrated the presence of mutations in PAK3 (p21-activating kinase) associated with nonspecific mental retardation. PAK3 is a member of the larger family of PAK genes. PAK proteins have been implicated as critical downstream effectors that link Rho-GTPases to the actin cytoskeleton and to MAP kinase cascades, including the c-Jun amino-terminal kinase (JNK) and p38. We screened 12 MRX pedigrees that map to a large region overlying Xq21-q24. Mutation screening of the whole coding region of the PAK3 gene was performed by using a combination of denaturing gradient gel electrophoresis and direct sequencing. We have identified a novel missense mutation in exon 2 of PAK3 gene (R67C) in MRX47. This confirms the involvement of PAK3 in MRX following the report of a nonsense mutation recently reported in MRX30. In the MRX47 family, all affected males show moderate to severe mental retardation. No seizures, statural growth deficiency, or minor facial or other abnormal physical features were observed. This mutation R67C is located in a conserved polybasic domain (AA 66-68) of the protein that is predicted to play a major role in the GTPases binding and stimulation of Pak activity.
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Affiliation(s)
- T Bienvenu
- Institut National de la Santé et de la Recherche Médicale U129-ICGM, Faculté de Médecine Cochin, Paris, France.
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Goloub P, Herman M, Chepfer H, Riedi J, Brogniez G, Couvert P, Séze G. Cloud thermodynamical phase classification from the POLDER spaceborne instrument. ACTA ACUST UNITED AC 2000. [DOI: 10.1029/1999jd901183] [Citation(s) in RCA: 93] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Bienvenu T, Carrié A, de Roux N, Vinet MC, Jonveaux P, Couvert P, Villard L, Arzimanoglou A, Beldjord C, Fontes M, Tardieu M, Chelly J. MECP2 mutations account for most cases of typical forms of Rett syndrome. Hum Mol Genet 2000; 9:1377-84. [PMID: 10814719 DOI: 10.1093/hmg/9.9.1377] [Citation(s) in RCA: 218] [Impact Index Per Article: 9.1] [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: 11/12/2022] Open
Abstract
Rett syndrome (RTT) is a severe progressive neurological disorder that affects almost exclusively females, with an estimated prevalence of approximately one in 10 000-15 000 female births. Most cases are sporadic, but several reports about familial recurrence support X-linked dominant inheritance with male lethality. The gene responsible for this disorder, MECP2, was recently identified by candidate gene strategy. Mutations were detected in <25% of RTT cases in this first report. To characterize the spectrum of mutations in the MECP2 gene in RTT patients, we selected 46 typical RTT patients and performed mutation screening by denaturing gradient gel electrophoresis combined with direct sequencing. We identified 30 mutations, accounting for 65% of RTT patients. They include 12 novel mutations (11 located in exon 3 and one in exon 2). Mutations, such as R270X and frameshift deletions in a (CCACC) (n) rich region, have been found with multiple recurrences. Most of the mutations were de novo, except in one family where the non-affected transmitter mother exhibited a bias of X inactivation. Although this study showed that MECP2 mutations account for most cases of typical forms of RTT (65%) and mutations in non-coding regions cannot be excluded for the remaining cases, an alternative hypothesis that takes into account the homogeneous phenotype and exclusive involvement of females, could be the implication in RTT of a putative second X-linked gene.
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Affiliation(s)
- T Bienvenu
- Laboratoire de Génétique et Physiopathologie des retards mentaux-ICGM, Faculté de Médecine Cochin, 24 rue du Faubourg Saint Jacques, 75014 Paris, France
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