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Zeiss R, Briones MJI, Mathieu J, Lomba A, Dahlke J, Heptner LF, Salako G, Eisenhauer N, Guerra CA. Effects of climate on the distribution and conservation of commonly observed European earthworms. Conserv Biol 2024; 38:e14187. [PMID: 37768192 DOI: 10.1111/cobi.14187] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 08/21/2023] [Accepted: 09/07/2023] [Indexed: 09/29/2023]
Abstract
Belowground biodiversity distribution does not necessarily reflect aboveground biodiversity patterns, but maps of soil biodiversity remain scarce because of limited data availability. Earthworms belong to the most thoroughly studied soil organisms and-in their role as ecosystem engineers-have a significant impact on ecosystem functioning. We used species distribution modeling (SDMs) and available data sets to map the spatial distribution of commonly observed (i.e., frequently recorded) earthworm species (Annelida, Oligochaeta) across Europe under current and future climate conditions. First, we predicted potential species distributions with commonly used models (i.e., MaxEnt and Biomod) and estimated total species richness (i.e., number of species in a 5 × 5 km grid cell). Second, we determined how much the different types of protected areas covered predicted earthworm richness and species ranges (i.e., distributions) by estimating the respective proportion of the range area. Earthworm species richness was high in central western Europe and low in northeastern Europe. This pattern was mainly associated with annual mean temperature and precipitation seasonality, but the importance of predictor variables to species occurrences varied among species. The geographical ranges of the majority of the earthworm species were predicted to shift to eastern Europe and partly decrease under future climate scenarios. Predicted current and future ranges were only poorly covered by protected areas, such as national parks. More than 80% of future earthworm ranges were on average not protected at all (mean [SD] = 82.6% [0.04]). Overall, our results emphasize the urgency of considering especially vulnerable earthworm species, as well as other soil organisms, in the design of nature conservation measures.
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Affiliation(s)
- Romy Zeiss
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
- Institute of Biology, Leipzig University, Leipzig, Germany
| | - Maria J I Briones
- Departamento de Ecologia y Biologia Animal, Universidade de Vigo, Vigo, Spain
| | - Jérome Mathieu
- Sorbonne Université, CNRS, IRD, INRAE, Université Paris Est Créteil, Université de Paris Cité, Institute of Ecology and Environmental Sciences of Paris (iEES-Paris), Paris, France
| | - Angela Lomba
- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Campus de Vairão, Universidade do Porto, Vairão, Portugal
- Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, Porto, Portugal
- BIOPOLIS Program in Genomics, Biodiversity and Land Planning, CIBIO, Campus de Vairão, Vairão, Portugal
| | - Jessica Dahlke
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
- Martin Luther University Halle-Wittenberg (MLU), Naturwissenschaftliche Fakultät 1, Halle (Saale), Germany
| | - Laura-Fiona Heptner
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
- Institute of Biology, Leipzig University, Leipzig, Germany
| | - Gabriel Salako
- Soil Zoology Division, Senckenberg Museum of Natural History, Görlitz, Germany
- Department of Environmental Management and Toxicology, Kwara State University, Malete, Nigeria
| | - Nico Eisenhauer
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
- Institute of Biology, Leipzig University, Leipzig, Germany
| | - Carlos A Guerra
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
- Institute of Biology, Leipzig University, Leipzig, Germany
- Martin Luther University Halle-Wittenberg (MLU), Naturwissenschaftliche Fakultät 1, Halle (Saale), Germany
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2
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Ehnes DD, Hussein AM, Ware CB, Mathieu J, Ruohola-Baker H. Combinatorial metabolism drives the naive to primed pluripotent chromatin landscape. Exp Cell Res 2020; 389:111913. [PMID: 32084392 DOI: 10.1016/j.yexcr.2020.111913] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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: 12/19/2019] [Revised: 02/07/2020] [Accepted: 02/17/2020] [Indexed: 02/07/2023]
Abstract
Since epigenetic modifications are a key driver for cellular differentiation, the regulation of these modifications is tightly controlled. Interestingly, recent studies have revealed metabolic regulation for epigenetic modifications in pluripotent cells. As metabolic differences are prominent between naive (pre-implantation) and primed (post-implantation) pluripotent cells, the epigenetic changes regulated by metabolites has become an interesting topic of analysis. In this review we discuss how combinatorial metabolic activities drive the developmental progression through early pluripotent stages.
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Affiliation(s)
- D D Ehnes
- Department of Biochemistry, University of Washington, Seattle, WA 98195, USA; Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98109, USA
| | - A M Hussein
- Department of Biochemistry, University of Washington, Seattle, WA 98195, USA; Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98109, USA
| | - C B Ware
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98109, USA; Department of Comparative Medicine, University of Washington, Seattle, WA, 98109, USA
| | - J Mathieu
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98109, USA; Department of Comparative Medicine, University of Washington, Seattle, WA, 98109, USA.
| | - H Ruohola-Baker
- Department of Biochemistry, University of Washington, Seattle, WA 98195, USA; Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98109, USA.
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3
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Phan M, Krishnan R, El Sayes N, Mathieu J, Selman M, Macklin A, Dornan M, Groom H, Patten D, Davis C, Lai F, Lichty B, Harper M, Arulanandam R, Bell J, Alain T, Josephy D, Smith J, Boddy C, Diallo J. Viral sensitizers potential infection of cancer cells via NF-kappaB. Eur J Cancer 2019. [DOI: 10.1016/j.ejca.2019.01.074] [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: 10/27/2022]
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4
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Mathieu J, Detraux D, Kuppers D, Wang Y, Cavanaugh C, Sidhu S, Levy S, Robitaille AM, Ferreccio A, Bottorff T, McAlister A, Somasundaram L, Artoni F, Battle S, Hawkins RD, Moon RT, Ware CB, Paddison PJ, Ruohola-Baker H. Folliculin regulates mTORC1/2 and WNT pathways in early human pluripotency. Nat Commun 2019; 10:632. [PMID: 30733432 PMCID: PMC6367455 DOI: 10.1038/s41467-018-08020-0] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 12/05/2018] [Indexed: 01/05/2023] Open
Abstract
To reveal how cells exit human pluripotency, we designed a CRISPR-Cas9 screen exploiting the metabolic and epigenetic differences between naïve and primed pluripotent cells. We identify the tumor suppressor, Folliculin(FLCN) as a critical gene required for the exit from human pluripotency. Here we show that FLCN Knock-out (KO) hESCs maintain the naïve pluripotent state but cannot exit the state since the critical transcription factor TFE3 remains active in the nucleus. TFE3 targets up-regulated in FLCN KO exit assay are members of Wnt pathway and ESRRB. Treatment of FLCN KO hESC with a Wnt inhibitor, but not ESRRB/FLCN double mutant, rescues the cells, allowing the exit from the naïve state. Using co-immunoprecipitation and mass spectrometry analysis we identify unique FLCN binding partners. The interactions of FLCN with components of the mTOR pathway (mTORC1 and mTORC2) reveal a mechanism of FLCN function during exit from naïve pluripotency. The pathways involved in exit from pluripotency in human embryonic stem cells are poorly understood. Here, the authors performed a CRISPR-based screen to identify genes that promote exit from naïve pluripotency and find a role for folliculin (FLCN) by regulating the mTOR and Wnt pathways.
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Affiliation(s)
- J Mathieu
- Department of Biochemistry, University of Washington, Seattle, WA, 98195, USA.,Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, 98109, USA.,Department of Comparative Medicine, University of Washington, Seattle, WA, 98109, USA
| | - D Detraux
- Department of Biochemistry, University of Washington, Seattle, WA, 98195, USA.,Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, 98109, USA.,Laboratory of Cellular Biochemistry and Biology (URBC), University of Namur, Namur, 5000, Belgium
| | - D Kuppers
- Human Biology Division, Fred Hutchinson Cancer Research Center, Seattle, WA, 98109, USA
| | - Y Wang
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, 98109, USA.,Paul G. Allen School of Computer Science & Engineering, University of Washington, Seattle, WA, 98109, USA
| | - C Cavanaugh
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, 98109, USA.,Department of Comparative Medicine, University of Washington, Seattle, WA, 98109, USA
| | - S Sidhu
- Department of Biochemistry, University of Washington, Seattle, WA, 98195, USA.,Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, 98109, USA
| | - S Levy
- Department of Biochemistry, University of Washington, Seattle, WA, 98195, USA.,Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, 98109, USA
| | - A M Robitaille
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, 98109, USA.,Department of Pharmacology, University of Washington, Seattle, WA, 98195, USA
| | - A Ferreccio
- Department of Biochemistry, University of Washington, Seattle, WA, 98195, USA.,Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, 98109, USA
| | - T Bottorff
- Department of Biochemistry, University of Washington, Seattle, WA, 98195, USA.,Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, 98109, USA
| | - A McAlister
- Department of Biochemistry, University of Washington, Seattle, WA, 98195, USA.,Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, 98109, USA
| | - L Somasundaram
- Department of Biochemistry, University of Washington, Seattle, WA, 98195, USA.,Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, 98109, USA
| | - F Artoni
- Department of Biochemistry, University of Washington, Seattle, WA, 98195, USA.,Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, 98109, USA
| | - S Battle
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, 98109, USA.,Department of Medical Genetics & Genome Sciences, University of Washington, Seattle, WA, 98195, USA
| | - R D Hawkins
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, 98109, USA.,Department of Medical Genetics & Genome Sciences, University of Washington, Seattle, WA, 98195, USA
| | - R T Moon
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, 98109, USA.,Department of Pharmacology, University of Washington, Seattle, WA, 98195, USA
| | - C B Ware
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, 98109, USA.,Department of Comparative Medicine, University of Washington, Seattle, WA, 98109, USA
| | - P J Paddison
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, 98109, USA. .,Human Biology Division, Fred Hutchinson Cancer Research Center, Seattle, WA, 98109, USA.
| | - H Ruohola-Baker
- Department of Biochemistry, University of Washington, Seattle, WA, 98195, USA. .,Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, 98109, USA.
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Molenaar J, Verhoeven J, Voermans N, Mathieu J, Vattemi G, Franques J, Kuntzer T, Guyant-Marechal L, Vicart S, Behin A, Erasmus C, Brandom B, Matthews E, Suetterlin K, van Engelen B, Sternberg D, Eymard B. The Brody disease cohort study: clarification of the phenotype. Neuromuscul Disord 2017. [DOI: 10.1016/j.nmd.2017.06.257] [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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6
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Dupont L, Torres-Leguizamon M, René-Corail P, Mathieu J. Landscape features impact connectivity between soil populations: a comparative study of gene flow in earthworms. Mol Ecol 2017; 26:3128-3140. [DOI: 10.1111/mec.14102] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Revised: 02/20/2017] [Accepted: 02/28/2017] [Indexed: 12/28/2022]
Affiliation(s)
- L. Dupont
- Université Paris Est Créteil (UPEC); Université Pierre et Marie Curie (UPMC); Paris 7; CNRS; INRA; IRD; Institut d’écologie et des Sciences de l'Environnement de Paris; Créteil Cedex France
| | - M. Torres-Leguizamon
- Université Paris Est Créteil (UPEC); Université Pierre et Marie Curie (UPMC); Paris 7; CNRS; INRA; IRD; Institut d’écologie et des Sciences de l'Environnement de Paris; Créteil Cedex France
| | - P. René-Corail
- Université Paris Est Créteil (UPEC); Université Pierre et Marie Curie (UPMC); Paris 7; CNRS; INRA; IRD; Institut d’écologie et des Sciences de l'Environnement de Paris; Créteil Cedex France
| | - J. Mathieu
- Sorbonne Universités; UPMC; UPEC; Paris 7; CNRS; INRA; IRD; Institut d'Ecologie et des Sciences de l'Environnement de Paris; Paris France
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7
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Brais B, Conte T, Dicaire M, Tetreault M, O'Ferrall E, Ravenscroft G, Laing N, Lamont P, Taivasssalo T, Hepple R, Mathieu J. A missense mutation in the putative sarcoplasmic reticulum transmembrane protein DCST2 causes dominant strongman syndrome. Neuromuscul Disord 2016. [DOI: 10.1016/j.nmd.2016.06.038] [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: 10/21/2022]
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8
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Abstract
In most species, cytokinesis is blocked in germ cells during at least some stage of their development. Abscission is difficult to assess directly in germ cells which are located in internal organs. Here, we described several indirect and direct methods to monitor the completion of abscission in Drosophila germ line cells. These methods are based on the observation that cells still connected by some cytoplasm share some degree of synchronization of their cell cycle. This synchrony can be detected on fixed tissue (Section 1.1), including using EdU incorporation to label S-phase (Section 1.2). Mitotic synchrony can also be observed using short-term live imaging (Section 1.3). Finally, we describe how the completion of abscission can be monitored using photoactivatable markers diffusing or not between two cells (Section 1.4).
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Affiliation(s)
- J Mathieu
- Institut Curie, Paris, France; CNRS UMR3215, Inserm U934, Paris, France
| | - J-R Huynh
- Institut Curie, Paris, France; CNRS UMR3215, Inserm U934, Paris, France
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9
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Merinville E, Grennan GZ, Gillbro JM, Mathieu J, Mavon A. Influence of facial skin ageing characteristics on the perceived age in a Russian female population. Int J Cosmet Sci 2015; 37 Suppl 1:3-8. [DOI: 10.1111/ics.12252] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Accepted: 06/17/2015] [Indexed: 01/18/2023]
Affiliation(s)
- E. Merinville
- Oriflame R&D; Bray Business Park; Kilruddery; Bray Co Wicklow Ireland
| | - G. Z. Grennan
- Oriflame R&D; Bray Business Park; Kilruddery; Bray Co Wicklow Ireland
| | - J. M. Gillbro
- Oriflame Skin Research Institute; Oriflame Cosmetics AB; Mäster Samuelsgatan 56; Stockholm 11121 Sweden
| | - J. Mathieu
- Oriflame Consumer Insight; Oriflame Cosmetics AB; Mäster Samuelsgatan 56; Stockholm 11121 Sweden
| | - A. Mavon
- Oriflame Skin Research Institute; Oriflame Cosmetics AB; Mäster Samuelsgatan 56; Stockholm 11121 Sweden
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10
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Bertrand JA, Jean S, Laberge L, Gagnon C, Mathieu J, Gagnon JF, Richer L. Psychological characteristics of patients with myotonic dystrophy type 1. Acta Neurol Scand 2015; 132:49-58. [PMID: 25496310 DOI: 10.1111/ane.12356] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/31/2014] [Indexed: 11/30/2022]
Abstract
OBJECTIVES Myotonic dystrophy type 1 (DM1) is the most common adult-onset muscular dystrophy. It is associated with motor symptoms but patients also display non-motor symptoms such as particular personality traits. Studies have reported mixed results about personality characteristics which may be attributable to small sample sizes, different disease severity of groups studied, and use of different questionnaires or method. This study aimed to describe the psychological characteristics of a large cohort of patients with DM1, to characterize those at risk of developing a psychiatric disorder, and to compare characteristics between two DM1 phenotypes, a mild and more severe adult-onset phenotype. METHODS Two hundred patients with DM1 (152 adult-onset; 48 mild) were asked to complete questionnaires assessing personality traits, psychological symptoms, self-esteem, and suicidal risk. Neurological and neuropsychological assessments were performed to compare personality characteristics to clinical and cognitive measures. RESULTS Patients with DM1 globally showed personality traits and psychological symptoms in the average range compared to normative data, with normal levels of self-esteem and suicidal ideation. However, 27% of patients were found to be at high risk of developing a psychiatric disorder. Moreover, psychological traits differed across phenotypes, with the most severe phenotype tending to show more severe psychological symptoms. The presence of higher phobic anxiety and lower self-esteem was associated with lower education, a higher number of CTG repeats, more severe muscular impairment, and lower cognitive functioning (P < 0.001). CONCLUSIONS Different phenotypes should thus be taken into account in clinical settings for individual management of patients and optimizing therapeutic success.
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Affiliation(s)
- J. A. Bertrand
- Rotman Research Institute; Baycrest Center; Toronto ON Canada
- Université du Québec à Montréal; Montréal QC Canada
| | - S. Jean
- Centre de santé et de services sociaux de Chicoutimi; Chicoutimi QC Canada
| | - L. Laberge
- Université du Québec à Chicoutimi; Chicoutimi QC Canada
- ÉCOBES - Recherche et transfert; Cégep de Jonquière; Jonquière QC Canada
| | - C. Gagnon
- Clinique des maladies neuromusculaires; Centre de santé et de services sociaux de Jonquière; Jonquière QC Canada
- Université de Sherbrooke; Sherbrooke QC Canada
| | - J. Mathieu
- Clinique des maladies neuromusculaires; Centre de santé et de services sociaux de Jonquière; Jonquière QC Canada
- Université de Sherbrooke; Sherbrooke QC Canada
| | - J. F. Gagnon
- Université du Québec à Montréal; Montréal QC Canada
| | - L. Richer
- Université du Québec à Chicoutimi; Chicoutimi QC Canada
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Tao S, Trzasko J, Shu Y, Weavers P, Huston J, Lee S, Mathieu J, Foo T, Bernstein M. TH-CD-207-11: Gradient Nonlinearity Calibration and Correction for Head-Only Asymmetric Gradient System. Med Phys 2015. [DOI: 10.1118/1.4926269] [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: 11/07/2022] Open
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12
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Conte T, Tetreault M, Dicaire M, Provost S, Al-Bustani N, Beland B, Dube M, Bolduc V, Srour M, O’Ferrall E, Bouchard J, Ravenscroft G, Laing N, Lamont P, Mathieu J, Hepple R, Brais B. G.P.197. Neuromuscul Disord 2014. [DOI: 10.1016/j.nmd.2014.06.273] [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: 11/24/2022]
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13
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Mathieu J, Pertek JP, Brua S, Samia Z, Losser MR. [Massive rhabdomyolysis: an uncommon complication of cholesterol embolization syndrome]. ACTA ACUST UNITED AC 2013; 32:879-81. [PMID: 24209502 DOI: 10.1016/j.annfar.2013.08.017] [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] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Accepted: 08/30/2013] [Indexed: 11/19/2022]
Abstract
A 79-year-old man with atherosclerosis presented blue toes and livedo reticularis. The patient had eroded aortic atheromatous plaques, and cholesterol embolization syndrome was suspected. An endovascular technique to exclude sources of cholesterol emboli was however performed. The patient immediately presented with severe muscle pain and total functional disability of lower limbs, new ischemic lesions of toes, anal and genital necrosis, and a livedo extended up to the abdomen. A massive rhabdomyolysis occurred associated with acute kidney injury and hyperkaliemia treated by continuous renal replacement therapy with regional citrate anticoagulation. Steroids have been introduced and renal function improved. Cholesterol crystals were also found on a skin biopsy, performed before endovascular procedure.
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Affiliation(s)
- J Mathieu
- Service de réanimation chirurgicale, département d'anesthésie-réanimation, institut lorrain du cœur et des vaisseaux Louis-Mathieu, CHU de Nancy, université de Lorraine, rue du Morvan, 54511 Vandœuvre-lès-Nancy, France
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14
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Al-Bustani N, Tétreault M, Provost S, Bolduc V, Srour M, O’Ferrall E, Dubé M, Bouchard J, Ravenscroft G, Laing N, Bignell D, Lamont P, Mathieu J, Brais B. G.P.126 “Strongman syndrome”: A new autosomal dominant herculean painful myopathy. Neuromuscul Disord 2012. [DOI: 10.1016/j.nmd.2012.06.332] [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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Boudsocq S, Niboyet A, Lata JC, Raynaud X, Loeuille N, Mathieu J, Blouin M, Abbadie L, Barot S. Plant preference for ammonium versus nitrate: a neglected determinant of ecosystem functioning? Am Nat 2012; 180:60-9. [PMID: 22673651 DOI: 10.1086/665997] [Citation(s) in RCA: 127] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Although nitrogen (N) availability is a major determinant of ecosystem properties, little is known about the ecological importance of plants' preference for ammonium versus nitrate (β) for ecosystem functioning and the structure of communities. We modeled this preference for two contrasting ecosystems and showed that β significantly affects ecosystem properties such as biomass, productivity, and N losses. A particular intermediate value of β maximizes the primary productivity and minimizes mineral N losses. In addition, contrasting β values between two plant types allow their coexistence, and the ability of one type to control nitrification modifies the patterns of coexistence with the other. We also show that species replacement dynamics do not lead to the minimization of the total mineral N pool nor the maximization of plant productivity, and consequently do not respect Tilman's R* rule. Our results strongly suggest in the two contrasted ecosystems that β has important consequences for ecosystem functioning and plant community structure.
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Affiliation(s)
- S Boudsocq
- Biogéochimie et Écologie des Milieux Continentaux (BioEMCo), Unité Mixte de Recherche (UMR) 7618, CNRS, Ecole Normale Supérieure (ENS), 46 Rue d'Ulm, 75230 Paris Cedex 05, France.
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Puymirat J, Bouchard J, Mathieu J. P4.44 Methylphenidate reduces excessive daytime sleepiness in patients with myotonic dystrophy. Neuromuscul Disord 2011. [DOI: 10.1016/j.nmd.2011.06.1009] [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: 11/27/2022]
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17
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Cossette L, Bouchard J, Mathieu J, Puymirat J. P5.8 The Quebec myotonic dystrophy-based population registry. Neuromuscul Disord 2011. [DOI: 10.1016/j.nmd.2011.06.1037] [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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Gagnon C, Chouinard M, Laberge L, Veillette S, Bégin P, Breton R, Jean S, Brisson D, Gaudet D, Mathieu J. Health supervision and anticipatory guidance in adult myotonic dystrophy type 1. Neuromuscul Disord 2010; 20:847-51. [DOI: 10.1016/j.nmd.2010.08.006] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2010] [Revised: 08/25/2010] [Accepted: 08/26/2010] [Indexed: 11/30/2022]
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Trocoli A, Mathieu J, Priault M, Souquère S, Pierron G, Reiffers J, Besançon F, Djavaheri-Mergny M. R53: Rôle de l’autophagie dans la différenciation des cellules leucémiques par l’acide rétinoïque. Bull Cancer 2010. [DOI: 10.1016/s0007-4551(15)30970-x] [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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Laberge L, Prévost C, Perron M, Mathieu J, Auclair J, Gaudreault M, Richer L, Jean S, Veillette S. Clinical and genetic knowledge and attitudes of patients with myotonic dystrophy type 1. Public Health Genomics 2010; 13:424-30. [PMID: 20689257 DOI: 10.1159/000316238] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2009] [Accepted: 06/03/2010] [Indexed: 11/19/2022] Open
Abstract
AIMS The goal was to assess clinical and genetic knowledge and attitudes in patients affected by myotonic dystrophy type 1 (DM1). METHODS Two hundred patients with molecular confirmation of the diagnosis of DM1 completed a multi-choice questionnaire. DM1 patients' knowledge and views were compared to clinically normal DM1 noncarriers (n = 264) and controls (n = 1,474). RESULTS Knowledge of the DM1 mode of inheritance was better in noncarriers than in patients (p < 0.001). Noncarriers were more aware than DM1 patients of the common clinical characteristics of DM1 such as limitations in physical activities and problems related to employment, schooling, activities of daily living, parenthood, peer relationships, and personality (p < 0.001). Compared to controls, DM1 patients felt less informed about the availability of clinical genetic services (p < 0.05) and new genetic technologies (p < 0.001). Among patients, logistic regression revealed that each additional year of education (p < 0.05) and each additional 100 CTG repeats (p < 0.01), respectively, increased and decreased the odds of knowing the DM1 mode of inheritance by about 23% and 18% respectively, independently of age, age at onset of symptoms, gender, severity of muscular impairment, and intellectual quotient. CONCLUSIONS DM1 patients' genetic knowledge is significantly dependent of the level of education and the number of CTG repeats. Healthcare providers should be aware of this situation in order to adjust counselling and education accordingly.
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Affiliation(s)
- L Laberge
- ÉCOBES Recherche et Transfert, Cégep de Jonquière, Saguenay, Qué., Canada.
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Dorandeu F, Taysse L, Boudry I, Foquin A, Hérodin F, Mathieu J, Daulon S, Cruz C, Lallement G. Cutaneous challenge with chemical warfare agents in the SKH-1 hairless mouse. (I) Development of a model for screening studies in skin decontamination and protection. Hum Exp Toxicol 2010; 30:470-90. [PMID: 20547654 DOI: 10.1177/0960327110373615] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Exposure to lethal chemical warfare agents (CWAs) is no longer only a military issue due to the terrorist threat. Among the CWAs of concern are the organophosphorus nerve agent O-ethyl-S-(2[di-isopropylamino]ethyl)methyl-phosphonothioate (VX) and the vesicant sulfur mustard (SM). Although efficient means of decontamination are available, most of them lose their efficacy when decontamination is delayed after exposure of the bare skin. Alternatively, CWA skin penetration can be prevented by topical skin protectants. Active research in skin protection and decontamination is thus paramount. In vivo screening of decontaminants or skin protectants is usually time consuming and may be expensive depending on the animal species used. We were thus looking for a suitable, scientifically sound and cost-effective model, which is easy to handle. The euthymic hairless mouse Crl: SKH-1 (hr/hr) BR is widely used in some skin studies and has previously been described to be suitable for some experiments involving SM or SM analogs. To evaluate the response of this species, we studied the consequences of exposing male anaesthetized SKH-1 mice to either liquid VX or to SM, the latter being used in liquid form or as saturated vapours. Long-term effects of SM burn were also evaluated. The model was then used in the companion paper (Taysse et al.(1)).
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Affiliation(s)
- F Dorandeu
- Département de Toxicologie et risque chimique, Institut de Recherche Biomédicale des Armées, Centre de Recherches du Service de Santé des Armées, La Tronche, France.
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Puymirat J, Giguere Y, Mathieu J, Bouchard JP. INTERGENERATIONAL CONTRACTION OF THE CTG REPEATS IN 2 FAMILIES WITH MYOTONIC DYSTROPHY TYPE 1. Neurology 2009; 73:2126-7. [DOI: 10.1212/wnl.0b013e3181c677e1] [Citation(s) in RCA: 10] [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] [Indexed: 11/15/2022] Open
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Laberge L, Bégin P, Dauvilliers Y, Beaudry M, Laforte M, Jean S, Mathieu J. A polysomnographic study of daytime sleepiness in myotonic dystrophy type 1. J Neurol Neurosurg Psychiatry 2009; 80:642-6. [PMID: 19211594 DOI: 10.1136/jnnp.2008.165035] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [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] [Indexed: 01/12/2023]
Abstract
OBJECTIVES To assess contributors to excessive daytime sleepiness (EDS) in myotonic dystrophy type 1 (DM1), to characterise subjects with sleep-onset REM periods (SOREMPs), and to verify whether self-reported instruments and respiratory function tests can predict multiple sleep latency test (MSLT) and sleep-disordered breathing. METHODS A sample of 43 DM1 patients without selection bias underwent polysomnography (PSG) for two consecutive nights and MSLT, completed a sleep diary and Epworth Sleepiness Scale (ESS), and were assessed for respiratory function and narcolepsy symptoms. RESULTS ESS scores (ES) > or =11 and MSLT mean sleep latency (MSL) < or =8 min were found in 21 (50.0%) and 19 (44.2%) subjects, and either in 30 (69.8%) subjects. ES did not relate to MSL. Subjects with subjective sleepiness (ES> or =11) reported more cataplexy-like and sleep paralysis symptoms, longer habitual sleep times, and higher sleep efficiency and REM sleep per cent than those without. Subjects with objective sleepiness (MSL< or =8 min) had a higher stage 4 sleep per cent. Subjects with > or =2 SOREMPs (25.6%) showed higher muscular impairment, lower MSL, higher ES, and more cataplexy-like symptoms than those with < or =1 SOREMP. Apnoea-hypopnoea index (AHI) > or =5, predominantly obstructive, was found in 37 (86.0%) subjects, and AHI >30 in 12 (27.9%). Neither subjective nor objective sleepiness could be explained by AHI, nor satisfactorily predicted by daytime respiratory abnormalities. CONCLUSIONS DM1 entails frequent EDS but with different phenotypes and distinct mechanisms involved. The high prevalence of daytime sleepiness and severe sleep apnoeas found in this study supports the routine use of clinical sleep interviews, PSG and MSLT in DM1, and emphasises the need for more randomised trials of psychostimulants.
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Affiliation(s)
- L Laberge
- Département des sciences de l'éducation et de psychologie, Université du Québec à Chicoutimi, 555, boul. de l'Université, Chicoutimi, Québec, Canada, G7H 2B1.
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Boudsocq S, Lata JC, Mathieu J, Abbadie L, Barot S. Modelling approach to analyse the effects of nitrification inhibition on primary production. Funct Ecol 2009. [DOI: 10.1111/j.1365-2435.2008.01476.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Srour M, Bolduc V, Bouchard J, Brunet D, Mathieu J, Brais B. M.P.1.03 DOK7 mutations presenting as a limb girdle muscular dystrophy in French Canadians. Neuromuscul Disord 2008. [DOI: 10.1016/j.nmd.2008.06.083] [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: 11/28/2022]
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Civrilli K, Damry N, Steppé R, Efira A, Mathieu J. Bilateral adrenal myelolipomas. JBR-BTR 2008; 91:90-91. [PMID: 18661711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- K Civrilli
- Department of Radiology, University Hospital Brugmann, Brussels, Belgium
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Mathieu J, Mammar S, Eto B. Automated measurement of intestinal mucosa electrical parameters using a new digital clamp. ACTA ACUST UNITED AC 2008; 30:591-8. [DOI: 10.1358/mf.2008.30.8.1271096] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Mathieu J, Flexor M, Lanotte M, Besançon F. A PARP-1/JNK1 cascade participates in the synergistic apoptotic effect of TNFα and all-trans retinoic acid in APL cells. Oncogene 2007; 27:3361-70. [DOI: 10.1038/sj.onc.1210997] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [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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Rossignol E, Mathieu J, Thiffault I, Tétreault M, Dicaire MJ, Chrestian N, Dupré N, Puymirat J, Brais B. A novel founder SCN4A mutation causes painful cold-induced myotonia in French-Canadians. Neurology 2007; 69:1937-41. [PMID: 17998485 DOI: 10.1212/01.wnl.0000290831.08585.2c] [Citation(s) in RCA: 18] [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] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Myotonia is observed in classic congenital myotonia caused by CLCN1 mutations and in sodium-channel myotonia (SCM) due to SCN4A mutations. METHODS We assessed 66 electrically proven cases of myotonia belonging to 17 French-Canadian families living in the Saguenay Lac St-Jean area of Quebec, a region well known for its genetic founder effects. The CLCN1 gene was sequenced in one affected member of each family. SCN4A exons with known SCM mutations were subsequently sequenced in families where no CLCN1 mutations were found. RESULTS Six families, 33% of cases (22/66), presenting classic congenital myotonia phenotypes were found to carry two previously identified CLCN1 mutations. In the other 11 families comprising 66% of cases (44/66), a new dominant SCN4A mutation in exon 24 (M1476I) was uncovered and segregated with a variable SCM phenotype. Although all carriers of this novel mutation had electrical myotonia, some were asymptomatic (25%) and age at onset was variable in the others (5 to 67, mean 21). Cold aggravated myotonia was observed in 41% of cases and painful myotonia in 18%. Additional features observed include aggravation of symptoms with pregnancies (7%), localized muscle swelling (2%), myotonic reactions to anesthesia (2%), and food-induced paralysis (2%). CONCLUSIONS This cohort is the largest described with a variable sodium-channel myotonia phenotype caused by a single SCN4A mutation. The clinical variability observed in this cohort underlines the phenotypic heterogeneity of SCN4A mutations and suggests that variants in other genes likely modulate clinical expression.
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Affiliation(s)
- E Rossignol
- Laboratory of Neurogenetics of Motion, Université de Montréal, Montréal, Canada
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Dupre N, Chrestian N, Brunet D, Bouchard J, Mathieu J, Puymirat J. G.P.10.15 Genotype–phenotype correlation and identification of new mutations in non-dystrophic myotonias. Neuromuscul Disord 2007. [DOI: 10.1016/j.nmd.2007.06.206] [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: 11/15/2022]
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Chen TC, Persons KS, Zheng S, Mathieu J, Holick MF, Lee YF, Bao B, Arai MA, Kittaka A. Evaluation of C-2-substituted 19-nor-1alpha,25-dihydroxyvitamin D3 analogs as therapeutic agents for prostate cancer. J Steroid Biochem Mol Biol 2007; 103:717-20. [PMID: 17207993 DOI: 10.1016/j.jsbmb.2006.12.009] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
1alpha,25-Dihydroxyvitamin D(3) (1alpha,25(OH)(2)D(3)) is known to inhibit the proliferation and invasiveness of prostate cancer cells. However, 1alpha,25(OH)(2)D(3) can cause hypercalcemia and is not suitable as a therapeutic agent. 19-Nor-vitamin D derivatives are known to be less calcemic when administered systemically. In order to develop more potent anti-cancer agents with less calcemic side effect, we therefore utilized (3)H-thymidine incorporation as an index for cell proliferation and examined the antiproliferative activities of nine C-2-substituted 19-nor-1alpha,25(OH)(2)D(3) analogs in the immortalized PZ-HPV-7 normal prostate cell line. Among the nine analogs we observed that the substitution with 2alpha- or 2beta-hydroxypropyl group produced two analogs having antiproliferative potency that is approximately 500- to 1000-fold higher than 1alpha,25(OH)(2)D(3). The (3)H-thymidine incorporation data were supported by the cell counting data after cells were treated with 1alpha,25(OH)(2)D(3), 19-nor-2alpha-(3-hydroxypropyl)-1alpha,25(OH)(2)D(3) or 19-nor-2beta-(3-hydroxypropyl)-1alpha,25(OH)(2)D(3) for 7 days. 19-Nor-2alpha-(3-hydroxypropyl)-1alpha,25(OH)(2)D(3) and 19-nor-2beta-(3-hydroxypropyl)-1alpha,25(OH)(2)D(3) were also shown to be about 10-fold more active than 1alpha,25(OH)(2)D(3) in cell invasion studies using prostate cancer cells. In conclusion, a substitution at the C-2 position of 19-nor-1alpha,25(OH)(2)D(3) molecule with a hydroxypropyl group greatly increased the antiproliferative and anti-invasion potencies. Thus, these two analogs could be developed to be effective therapeutic agents for treating early and late stages of prostate cancer.
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Affiliation(s)
- T C Chen
- Boston University School of Medicine, 715 Albany Street, Boston, MA 02118, USA.
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Huynen P, Melin P, Hayette M, Mathieu J, De Mol P. R2209 Liaison® VZV IgG and VZV IgM assays: a comparative study. Int J Antimicrob Agents 2007. [DOI: 10.1016/s0924-8579(07)72048-4] [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: 10/23/2022]
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Abstract
Socioeconomic deprivation has long been recognized as a prominent feature of myotonic dystrophy type 1 (DM1), but studies performed before the discovery of the mutation causing DM1 may have suffered an ascertainment bias towards the more severe forms of the disease. We have sought to clarify the relationship between CTG repeats, muscular impairment, and socioeconomic characteristics of 200 patients with DM1. Patients with DM1 reported lower educational attainment, lower employment rate, lower family income, and higher reliance on social assistance than the reference population. Logistic regression showed, on one hand, that CTG repeats and marital status were significant predictors of social assistance recipiency and, on the other hand, that CTG repeats and gender were significant predictors of low social support from family, after adjustment for age, gender, degree of muscular impairment, CTG repeats, educational level, and marital status. For example, each additional 100 CTG repeats was found to increase the odds of relying on social assistance by about 35% and having low social support by about 22%. The chances of experiencing socioeconomic deprivation are loaded heavily against patients with DM1. The relationship between increased CTG repeat length and higher risk of material and social deprivation must be acknowledged in the clinical management of DM1.
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Affiliation(s)
- L Laberge
- Groupe ECOBES, Cégep de Jonquière, Université du Québec, à Chicoutimi, Québec, Canada
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Tétreault M, Duquette A, Thiffault I, Bherer C, Jarry J, Loisel L, Banwell B, D'Anjou G, Mathieu J, Robitaille Y, Vanasse M, Brais B. A new form of congenital muscular dystrophy with joint hyperlaxity maps to 3p23-21. Brain 2006; 129:2077-84. [PMID: 16760198 DOI: 10.1093/brain/awl146] [Citation(s) in RCA: 24] [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: 11/14/2022] Open
Abstract
Congenital muscular dystrophies (CMDS) are a heterogeneous group of disorders. A growing number of CMDS have been found to be associated with joint hyperlaxity. We recruited 14 French-Canadian cases belonging to 11 families affected by a novel autosomal recessive congenital muscular dystrophy with hyperlaxity (CMDH). All cases come from the southwestern part of Quebec, suggesting a new French-Canadian founder effect. All patients present muscle weakness, proximal contractures coexisting with distal joint hyperlaxity. Pathological and genetic studies have excluded that mutations in the three genes coding for collagen VI subunits are responsible for this disease. A genome-wide scan established linkage of two CMDH families to a region on chromosome 3p23-21. Further linkage analysis confirmed that all families are linked to the same region (log of the odds score of 5.3). Haplotype analysis defines a 1.6-cM candidate interval and suggests that two common mutations may account for 78% of carrier chromosomes. This study describes and maps a new form of recessive CMD with joint hyperlaxity distinct from Ullrich and Bethlem myopathies with a founder effect in the French-Canadian population.
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Affiliation(s)
- M Tétreault
- Laboratoire de neurogénétique, Center for the study of brain diseases, Centre de recherche du CHUM Montreal, Québec, Canada
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Arsenault ME, Prévost C, Lescault A, Laberge C, Puymirat J, Mathieu J. Clinical characteristics of myotonic dystrophy type 1 patients with small CTG expansions. Neurology 2006; 66:1248-50. [PMID: 16636244 DOI: 10.1212/01.wnl.0000208513.48550.08] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.4] [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: 12/21/2022] Open
Abstract
The authors report a genotype-phenotype correlation study in 102 patients with myotonic dystrophy type 1 carrying small CTG repeat expansions. Most patients carrying 50 to 99 CTG repeats were asymptomatic, except for cataracts. Myotonia, weakness, excessive daytime sleepiness, and myotonic discharges at EMG were significantly more present in the patients with 100 to 200 CTG repeats. These findings highlight different outcomes related to the expansion size, even among small CTG expansions.
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Affiliation(s)
- M-E Arsenault
- Neuromuscular Clinic, Carrefour de Santé de Jonquière, Quebec, Canada.
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Thiffault I, Rioux MF, Tetreault M, Jarry J, Loiselle L, Poirier J, Gros-Louis F, Mathieu J, Vanasse M, Rouleau GA, Bouchard JP, Lesage J, Brais B. A new autosomal recessive spastic ataxia associated with frequent white matter changes maps to 2q33-34. Brain 2006; 129:2332-40. [PMID: 16672289 DOI: 10.1093/brain/awl110] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [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: 11/13/2022] Open
Abstract
Recessive ataxias are a heterogeneous group of diseases. We identified a group of 23 French-Canadian cases belonging to 17 families affected by an autosomal recessive spastic ataxia associated with frequent white matter changes. The fact that 59% of these families have a genealogical relationship to the Portneuf County of Quebec suggests that this is a new form of ataxia with a regional founder effect. All cases present with cerebellar ataxia and spasticity. There is great intrafamilial and interfamilial variability, as illustrated by the spectrum of age of diagnosis (range: 2-59 years, mean: 15.0) and the presence of white matter changes on MRI in 52.4% of cases. The more severe cases have spasticity from birth, scoliosis, dystonia and cognitive impairment and were considered cases of cerebral palsy. Brain MRI constantly shows cerebellar atrophy, which in some cases may be associated with cortical atrophy, leucoencephalopathy and corpus callosum thinning. A genome wide scan uncovered linkage of three families to marker D2S2321 localized on chromosome 2q33-34. Linkage analysis confirmed that all families are linked to the same region [multipoint log of the odds (LOD) score of 5.95]. Haplotype analysis and allele sharing suggest that one common mutation may account for 97% of carrier chromosomes in Quebec. The uncovering of the mutated gene may point to a common pathway for pyramidal and cerebellar degeneration as both are often observed in recessive ataxias and complicated paraplegias.
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Affiliation(s)
- I Thiffault
- Laboratoire de neurogénétique de la motricité, Center for the study of brain diseases, Centre de recherche du CHUM, Montreal, Canada
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Abstract
OBJECTIVES To assess the reliability of the Epworth Sleepiness Scale (ESS), Daytime Sleepiness Scale (DSS), Chalder Fatigue Scale (CFS), and Krupp's Fatigue Severity Scale (KFSS) in patients with myotonic dystrophy type 1 (DM1). METHODS In total, 27 patients with DM1 were administered the questionnaires on two occasions, with a 2 week interval. Internal consistency and test retest reliability were measured using intraclass correlation coefficients (ICCs), and Cronbach's alpha, Cohen's kappa, and Goodman-Kruskal's gamma coefficients. RESULTS Internal consistency of the CFS and KFSS were adequate (alpha > 0.70) but that of the ESS was weak (alpha = 0.24). Both daytime sleepiness and fatigue rating scales showed significant test retest reliability. Test retest reliability for individual items revealed inconsistencies for some ESS and CFS items. CONCLUSIONS Reliability of the CFS, DSS, and KFSS was high, allowing their use for individual patients with DM1, but that of the ESS was lower, rendering its current usage in DM1 questionable. Fatigue rating scales such as the KFSS, which are based on the behavioural consequences of fatigue, may constitute a more accurate and comprehensive measure of fatigue severity in the DM1 population.
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Affiliation(s)
- L Laberge
- Unité de recherche clinique, Complexe hospitalier de la Sagamie, Chicoutimi, Québec, Canada, G7H 5H6.
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Salem W, De Keyser F, Hermanus N, Mathieu J, Klein P. Cinématique 3D lors de la manipulation de la colonne vertébrale en ‘ rouleau lombaire’, étude préliminaire. Comput Methods Biomech Biomed Engin 2005. [DOI: 10.1080/10255840512331389163] [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: 10/25/2022]
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Salem W, Hermanus N, Mathieu J, Klein P. Analyse de la cinématique 3D du rachis cervical lors de la rotation maximale de la tête. Comput Methods Biomech Biomed Engin 2005. [DOI: 10.1080/10255840512331389172] [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: 10/25/2022]
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Holick MF, Mathieu J, Ingersoll D, Chen T. 66 A NOVEL APPROACH FOR PROVIDING NURSING HOME RESIDENTS WITH THEIR VITAMIN D REQUIREMENT. J Investig Med 2005. [DOI: 10.2310/6650.2005.00205.65] [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: 11/18/2022]
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Gourmelon P, Marquette C, Agay D, Mathieu J, Clarençon D. Involvement of the central nervous system in radiation-induced multi-organ dysfunction and/or failure. Br J Radiol 2005. [DOI: 10.1259/bjr/15393845] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Marquette C, Linard C, Galonnier M, Van Uye A, Mathieu J, Gourmelon P, Clarençon D. IL-1beta, TNFalpha and IL-6 induction in the rat brain after partial-body irradiation: role of vagal afferents. Int J Radiat Biol 2004; 79:777-85. [PMID: 14630536 DOI: 10.1080/09553000310001610998] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.0] [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: 10/26/2022]
Abstract
PURPOSE To evaluate the central nervous system neuroimmune and inflammatory responses during the prodromal phase of the acute irradiation syndrome in rat brains after partial-body exposure (head-protected) and to investigate the potential neural signalling pathways from the irradiated periphery to the non-irradiated brain. MATERIAL AND METHODS The study included four groups of rats: one irradiated group and one sham irradiated group, each containing non-vagotomized and vagotomized rats. In vagotomized rat groups, the subdiaphragmatic vagal section surgery was carried out 45 days before the irradiation exposure. The rats were partial-body irradiated with the head shielded with (60)Co gamma-rays to a dose of 15 Gy. They were sacrificed 6 h after the end of exposure. The hypothalamus, hippocampus, thalamus and cortex were then collected, and the concentrations of IL-1beta, TNFalpha and IL-6 in each were measured by ELISA assays. RESULTS Six hours after irradiation, IL-1beta levels had increased in the hypothalamus, thalamus and hippocampus, and TNFalpha and IL-6 levels had increased significantly in the hypothalamus. Vagotomy before irradiation prevented these responses. CONCLUSIONS It was concluded that the hypothalamus, hippocampus, thalamus and cortex react rapidly to peripheral irradiation by releasing pro-inflammatory mediators. The results also show that the vagus nerve is one of the major ascending pathways for rapid signalling to the brain with respect to partial body irradiation.
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Affiliation(s)
- C Marquette
- IRSN BP no. 17 F-92262 Fontenay aux Roses cedex France.
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Abstract
OBJECTIVE To establish baseline data, using a quantitative motor evaluation protocol, prior to a prospective longitudinal study of the natural history of muscular involvement in myotonic dystrophy (DM). DESIGN/METHODS We conducted a cross-sectional study using a protocol consisting of manual muscle testing (MMT), quantitative muscle testing (QMT), and timed functional testing (TFT) on 50 definite DM patients (27 men, 23 women), aged 16 to 67 years. The relationships between MMT, QMT and TFT scores and disease duration were examined using linear regression analysis. RESULTS The muscle weakness was symmetric and the neck flexors and the distal muscles of upper and lower extremities were weaker than proximal muscles. Using MMT scores, the average strength decline was 0.95% per year and was similar for men and women. The strength decline was significantly more rapid for distal muscles than for proximal muscles. Quantitative muscle testing scores documented a strength decline per year of disease duration of 1.2-1.6% for the hip flexors and of 2.0-3.0% for the hand grip flexors. CONCLUSIONS We observed significant linear relationships between the scores generated by this protocol and disease duration. These data illustrate the distal to proximal progression of muscular involvement in DM, a pattern of progression well-recognized by the clinicians. The follow-up assessment of a large DM cohort in a longitudinal study will establish whether this quantitative protocol provides sensitive measures of the disease progression.
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Affiliation(s)
- J Mathieu
- Neuromuscular Clinic, Centre de réadaptation en déficience physique, Jonquière, QC, Canada
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44
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Abstract
Epstein-Barr virus (EBV), a member of the gamma-herpesvirus family, is involved in the development of several diseases, and the infection is believed to persist for life in latent form. Ionizing radiation at clinically relevant doses may increase the amount of virus reactivation in B cells, and the combination of radiation with stress could amplify EBV reactivation. In vitro experiments were performed on several cell lines, including EBV-positive Burkitt lymphoma cells. The presence of the immediate-early protein ZEBRA, which is a hallmark of EBV reactivation, was evaluated using flow cytometry, which enabled us to measure the percentage of ZEBRA-positive cells. The process was studied previously in the EBV-positive Burkitt lymphoma cell line B95-8. Forty-eight hours after irradiation alone, 13.6 and 19.9% ZEBRA-positive cells were observed at 2 and 4 Gy, respectively, compared to the basal level of 1.85%. Thus irradiation induces EBV reactivation. The addition of a glucocorticoid (the final effector of the stress response) had no effect on EBV reactivation in our model. However, the combination of radiation and treatment with a glucocorticoid (dexamethasone) increased the expression of ZEBRA in B95-8 cells (15.8 and 28.75% of the cells was positive at 24 and 48 h after gamma irradiation, respectively). Thus the combination of gamma radiation and a glucocorticoid may play an important role in EBV reactivation.
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Affiliation(s)
- C Ferrieu
- Département de Radiobiologie et Inflammation, Centre de Recherches de Service de Santé des Armées, 24 av. des Maquis du Grésivaudan, BP 87, F-38702 La Tronche cedex, France
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45
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Abstract
During American and Russian short and long-term space flights neuroimmune dysregulations have been observed in man and rats for up to three months after the return. During Extra-Vehicular Activity, radiation exposure risk is greater to elicit short and/or long-term deleterious effects on the functional capacity of the neuroimmune system. In order to assess the effects of high LET events on neuroimmune networks, our preliminary ground-based study was to investigate brain inflammatory responses in mouse after low dose radiation exposure with high LET particles (12C, 95MeV/u, 42 mGy). Plasma corticosterone levels were rapidly (6 hours) increased by two-fold, then decreased 24 hours post-irradiation. At 3 days plasma corticosterone and ACTH concentrations were also two- to three-fold increased. Plasma ACTH levels were still elevated up to seven days to two months. Furthermore immune functions are under current assessment. The results of this study should allow a greater understanding of the effects of high LET particles on neuroimmune system.
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Affiliation(s)
- L Lebaron-Jacobs
- Institute of Protection and Nuclear Safety (IPSN), Fontenay aux Roses, France
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46
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Brisson D, Houde G, St-Pierre J, Vohl MC, Mathieu J, Gaudet D. The pleiotropic expression of the myotonic dystrophy protein kinase gene illustrates the complex relationships between genetic, biological and clinical covariates of male aging. Aging Male 2002; 5:223-32. [PMID: 12630069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/01/2023] Open
Abstract
Aging is a complex process modulated by multiple interactions between environmental and genetic factors. Myotonic dystrophy (DM1) is an autosomal dominant disorder caused by an unstable (CTG)n repeat expansion in the DM1 protein kinase (DMPK) gene. The affected male patients' life expectancy at birth (53.2 years) is more than two decades below that observed in most occidental populations. The DMPK gene expression is pleiotropic and includes the premature expression of several age-related signs, symptoms and metabolic disturbances including hormonal dysfunctions, progressive decrease in muscular mass, presenile cataracts, alopecia, reduced alertness, insulin resistance, dyslipidemia, erectile dysfunction and hypogonadism. The aim of this study was to analyze the relationship between aging covariates and the severity of DM1 expression in 136 DM1 male subjects. DM1 clinical expression was assessed on a validated neuromuscular disability rating scale and was correlated with plasma total testosterone (rs = -0.31, p < 0.001), luteinizing hormone (LH) (rs = 0.52, p < 0.001) and follicle stimulating hormone (FSH) (rs = 0.54, p < 0.001) levels. Following LH releasing hormone stimulation, FSH and LH concentrations increased as a function of DM1 severity (p < 0.05). Muscular disability in DM1 was also positively associated with fasting plasma insulin and triglyceride concentrations (p < 0.05). The association of plasma apolipoprotein B and low-density lipoprotein cholesterol levels with DM1 was not linear across their distribution and tended to reflect cell membrane damage progression. These results suggest that DM1, a simple Mendelian trait, can represent a valuable model to illustrate the complex relationships between variables associated with male aging.
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Affiliation(s)
- D Brisson
- Lipid Research Group and University of Montreal Community Genomic Medicine Center, Chicoutimi Hospital, Quebec, Canada
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47
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Abstract
Myotonic dystrophy (DM1) is caused by an unstable CTG repeat expansion. Despite the evidence of birth order effect in congenital DM1, the expansion's dynamics among sibships is still unknown. The objective of this study was to determine phenotype and CTG repeat size variability in DM1 sibships, and to investigate their predictive values. We compared 86 sib pairs for CTG repeat, 61 for age at onset and 89 for DM1 phenotype. CTG repeats remained stable for 66 of the 86 sib pairs, including 25 of 27 maternal transmissions and 30 of 42 paternal transmissions. Variations of less than 10 years in the age at onset were observed in 44 of 61 sib pairs, including 16 of 18 maternal transmissions and 19 of 28 paternal transmissions. The same phenotypic severity or a variation of only one class was observed among 86 of the 89 sib pairs, including all of the 35 maternal transmissions and 30 of the 33 paternal transmissions. Birth order, intergenesic interval, oldest sib's CTG repeat or parental age and CTG repeat did not exert any significant influence. These results suggest that genotype and phenotype remained stable among sibs, although the paternal origin of the mutation seemed to reduce the predictability of the severity.
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Affiliation(s)
- D Brisson
- Community Genomic Medicine Center, University of Montreal, Chicoutimi Hospital, Québec, Canada.
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48
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Tournier JN, Jouan A, Mathieu J, Drouet E. Gulf war syndrome: could it be triggered by biological warfare-vaccines using pertussis as an adjuvant? Med Hypotheses 2002; 58:291-2. [PMID: 12027522 DOI: 10.1054/mehy.2001.1542] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Several recent epidemiological studies have shown that vaccinations against biological warfare using pertussis as an adjuvant were associated with the Gulf war syndrome. If such epidemiological findings are confirmed, we propose that the use of pertussis as an adjuvant could trigger neurodegeneration through induction of interleukin-1beta secretion in the brain. In turn, neuronal lesions may be sustained by stress or neurotoxic chemical combinations. Particular susceptibility for IL-1beta secretion and potential distant neuronal damage could provide an explanation for the diversity of the symptoms observed on veterans.
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Affiliation(s)
- J-N Tournier
- Département de biologie des agents transmissibles, CRSSA, La Tronche, France.
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49
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Mercier J, Prévost C, Engert JC, Bouchard JP, Mathieu J, Richter A. Rapid detection of the sacsin mutations causing autosomal recessive spastic ataxia of Charlevoix-Saguenay. Genet Test 2002; 5:255-9. [PMID: 11788093 DOI: 10.1089/10906570152742326] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Autosomal recessive spastic ataxia of Charlevoix-Saguenay (ARSACS; MIM SACS 270550) is frequent in northeastern Québec. Two causal mutations have been identified in the 11.7-kb single exon sacsin gene by sequence-based analyses. Mutation g.6594delT (DeltaT) was reported in 96% of the patients whereas a g.5254C --> T nonsense mutation has been observed only in 2 families. Here we report a reliable and inexpensive method to detect more than 95% of the ARSACS disease alleles from northeastern Québec using allele-specific oligonucleotide (ASO) hybridization. This procedure is being incorporated into the diagnosis of ARSACS, as well as being used for carrier detection in at-risk families from northeastern Québec.
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Affiliation(s)
- J Mercier
- Service de Génétique Médicale, Hôpital Sainte-Justine, Département de Pédiatrie, Université de Montréal, 3175 Côte Sainte Catherine, Montréal, Québec, Canada H3T 1C5
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50
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Willot V, Mathieu J, Lu Y, Schmid B, Sidi S, Yan YL, Postlethwait JH, Mullins M, Rosa F, Peyriéras N. Cooperative action of ADMP- and BMP-mediated pathways in regulating cell fates in the zebrafish gastrula. Dev Biol 2002; 241:59-78. [PMID: 11784095 DOI: 10.1006/dbio.2001.0494] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.9] [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: 11/22/2022]
Abstract
It was shown in Xenopus and chick that Spemann's organizer activity is regulated through the negative action of Anti-Dorsalizing Morphogenetic Protein (ADMP). We report the characterization and functional properties of admp in zebrafish. admp expression profile is consistent with a role in the organizer, including the tail organizer. We studied admp function through overexpression experiments, with the use of a dominant-negative form (TR-ADMP) and of an antisense morpholino-modified oligonucleotide. Our results indicate that the ADMP pathway causes the restriction of anterior and axial fates and that ADMP, BMP2b, and BMP7 pathways have distinct actions but cooperate in establishing proper dorso-ventral regionalization. This is shown by partial rescue of the dorsalized mutant snailhouse and of the ventralized mutant chordino, upon admp and tr-admp RNA injection, respectively. Moreover, ADMP and BMP7 probably form heterodimers as shown by the ability of TR-ADMP and BMP7 to antagonize each other. We observed that a MYC-tagged ADMP was secreted and detected in the extracellular space, suggesting that admp could act at a distance. Simultaneous local inhibition of bmp function at the blastoderm margin and impairment of ADMP secretion led to the induction of secondary head structures, confirming that the two pathways cooperatively regulate organizer formation and activity.
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Affiliation(s)
- V Willot
- U 368 INSERM, Ecole Normale Supérieure, 46 rue d'Ulm, Paris, 75005, France
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