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An integrated modelling methodology for estimating the prevalence of centronuclear myopathy. Neuromuscul Disord 2018; 28:766-777. [DOI: 10.1016/j.nmd.2018.06.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 02/24/2018] [Accepted: 06/26/2018] [Indexed: 11/22/2022]
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Shichiji M, Biancalana V, Fardeau M, Hogrel JY, Osawa M, Laporte J, Romero NB. Extensive morphological and immunohistochemical characterization in myotubular myopathy. Brain Behav 2013; 3:476-86. [PMID: 24381816 PMCID: PMC3869686 DOI: 10.1002/brb3.147] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Revised: 05/02/2013] [Accepted: 05/06/2013] [Indexed: 11/30/2022] Open
Abstract
The X-linked myotubular myopathy (XLMTM) also called X-linked centronuclear myopathy is a rare congenital myopathy due to mutations in the MTM 1 gene encoding myotubularin. The disease gives rise to a severe muscle weakness in males at birth. The main muscle morphological characteristics (significant number of small muscle fibers with centralized nuclei and type 1 fiber predominance) are usually documented, but the sequence of formation and maintenance of this particular morphological pattern has not been extensively characterized in humans. In this study, we perform a reevaluation of morphological changes in skeletal muscle biopsies in severe XLMTM. We correlate the pathologic features observed in the muscle biopsies of 15 newborns with MTM 1-mutations according to the "adjusted-age" at the time of muscle biopsy, focusing on sequential analysis in the early period of the life (from 34 weeks of gestation to 3 months of age). We found a similar morphological pattern throughout the period analyzed; the proportion of myofibers with central nuclei was high in all muscle biopsies, independently of the muscle type, the age of the newborns at time of biopsy and the specific MTM 1 mutation. We did not observe a period free of morphological abnormalities in human skeletal muscle as observed in myotubularin-deficient mouse models. In addition, this study demonstrated some features of delayed maturation of the muscle fibers without any increase in the number of satellite cells, associated with a marked disorganization of the muscle T-tubules and cytoskeletal network in the skeletal muscle fibers.
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Affiliation(s)
- Minobu Shichiji
- Unité de Morphologie Neuromusculaire, Institut de Myologie GHU La Pitié-Salpêtrière, Paris, France ; Department of Pediatrics, Tokyo Woman's Medical University Tokyo, Japan
| | - Valérie Biancalana
- Department of Translational Medecine, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS, UMR7104, INSERM, U964, Collège de France, Université de Strasbourg Illkirch, France ; Laboratoire Diagnostic Génétique, Faculté de Médecine - CHRU Strasbourg, France
| | - Michel Fardeau
- Unité de Morphologie Neuromusculaire, Institut de Myologie GHU La Pitié-Salpêtrière, Paris, France ; Groupe Hospitalier-Universitaire La Pitié-Salpêtrière, AP-HP, Centre de référence des maladies neuromusculaires Paris-Est, Paris, France
| | - Jean-Yves Hogrel
- UPMC-Paris6 UR76, INSERM UMR974, CNRS UMR 7215, Institut de Myologie GHU La Pitié-Salpêtrière, Paris, France
| | - Makiko Osawa
- Department of Pediatrics, Tokyo Woman's Medical University Tokyo, Japan
| | - Jocelyn Laporte
- Department of Translational Medecine, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS, UMR7104, INSERM, U964, Collège de France, Université de Strasbourg Illkirch, France
| | - Norma Beatriz Romero
- Unité de Morphologie Neuromusculaire, Institut de Myologie GHU La Pitié-Salpêtrière, Paris, France ; Groupe Hospitalier-Universitaire La Pitié-Salpêtrière, AP-HP, Centre de référence des maladies neuromusculaires Paris-Est, Paris, France ; UPMC-Paris6 UR76, INSERM UMR974, CNRS UMR 7215, Institut de Myologie GHU La Pitié-Salpêtrière, Paris, France
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Amburgey K, Lawlor MW, Del Gaudio D, Cheng YW, Fitzpatrick C, Minor A, Li X, Aughton D, Das S, Beggs AH, Dowling JJ. Large duplication in MTM1 associated with myotubular myopathy. Neuromuscul Disord 2012; 23:214-8. [PMID: 23273872 DOI: 10.1016/j.nmd.2012.11.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Revised: 10/23/2012] [Accepted: 11/23/2012] [Indexed: 11/26/2022]
Abstract
Myotubular myopathy is a subtype of centronuclear myopathy with X-linked inheritance and distinctive clinical and pathologic features. Most boys with myotubular myopathy have MTM1 mutations. In remaining individuals, it is not clear if disease is due to an undetected alteration in MTM1 or mutation of another gene. We describe a boy with myotubular myopathy but without mutation in MTM1 by conventional sequencing. Array-CGH analysis of MTM1 uncovered a large MTM1 duplication. This finding suggests that at least some unresolved cases of myotubular myopathy are due to duplications in MTM1, and that array-CGH should be considered when MTM1 sequencing is unrevealing.
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Affiliation(s)
- K Amburgey
- Department of Pediatrics, University of Michigan, Ann Arbor, MI, USA
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Trump N, Cullup T, Verheij JBGM, Manzur A, Muntoni F, Abbs S, Jungbluth H. X-linked myotubular myopathy due to a complex rearrangement involving a duplication of MTM1 exon 10. Neuromuscul Disord 2011; 22:384-8. [PMID: 22153990 DOI: 10.1016/j.nmd.2011.11.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2011] [Revised: 11/11/2011] [Accepted: 11/16/2011] [Indexed: 11/18/2022]
Abstract
X-linked myotubular myopathy is a predominantly severe congenital myopathy with central nuclei on muscle biopsy due to mutations in the MTM1 gene encoding myotubularin. We report a boy with typical features of X-linked myotubular myopathy. Sequencing of the MTM1 gene did not reveal any causative mutations. Subsequent MLPA analysis identified a duplication of MTM1 exon 10 both in the patient and his mother. Additional quantitative fluorescent PCR and long-range PCR revealed an additional large deletion (2536bp) within intron 10, 143bp downstream of exon 10, and confirmed the duplication of exon 10. Our findings suggest that complex rearrangements have to be considered in typically affected males with X-linked myotubular myopathy.
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Affiliation(s)
- N Trump
- DNA Laboratory, GSTS Pathology, Guy's Hospital, London, UK.
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Robb SA, Sewry CA, Dowling JJ, Feng L, Cullup T, Lillis S, Abbs S, Lees MM, Laporte J, Manzur AY, Knight RK, Mills KR, Pike MG, Kress W, Beeson D, Jungbluth H, Pitt MC, Muntoni F. Impaired neuromuscular transmission and response to acetylcholinesterase inhibitors in centronuclear myopathies. Neuromuscul Disord 2011; 21:379-86. [PMID: 21440438 DOI: 10.1016/j.nmd.2011.02.012] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2010] [Revised: 02/01/2011] [Accepted: 02/09/2011] [Indexed: 11/30/2022]
Abstract
Many clinical features of autosomal centronuclear myopathies (CNM) and X-linked myotubular myopathy (XLMTM) are common to congenital myasthenic syndromes (CMS). We describe three children whose clinical and electrophysiological findings originally suggested CMS, in whom CNM was diagnosed pathologically, though not yet genetically characterised. A fourth case, with XLMTM, also showed electrophysiological features of a neuromuscular transmission defect. Three (including the XLMTM case) showed improved strength with acetylcholinesterase inhibitor treatment. We also studied neuromuscular junction structure and function in the MTM1 knockdown zebrafish model of XLMTM, demonstrating abnormal neuromuscular junction organization; anticholinesterase therapy resulted in marked clinical response. These observations suggest that a neuromuscular transmission defect may accompany CNM and contribute to muscle weakness. Muscle biopsy should be considered in infants suspected to have CMS, especially if treatment response is incomplete, or no CMS gene mutation is identified. Treatment with acetylcholinesterase inhibitors may benefit some CNM patients. This warrants further confirmation.
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Affiliation(s)
- Stephanie A Robb
- The Dubowitz Neuromuscular Centre, Institute of Child Health and Great Ormond Street Hospital, London, UK.
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Jungbluth H, Wallgren-Pettersson C, Laporte JF. 164th ENMC International workshop: 6th workshop on centronuclear (myotubular) myopathies, 16–18th January 2009, Naarden, The Netherlands. Neuromuscul Disord 2009; 19:721-9. [DOI: 10.1016/j.nmd.2009.06.373] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2009] [Indexed: 11/25/2022]
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Jungbluth H, Wallgren-Pettersson C, Laporte J. Centronuclear (myotubular) myopathy. Orphanet J Rare Dis 2008; 3:26. [PMID: 18817572 PMCID: PMC2572588 DOI: 10.1186/1750-1172-3-26] [Citation(s) in RCA: 223] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2008] [Accepted: 09/25/2008] [Indexed: 01/23/2023] Open
Abstract
Centronuclear myopathy (CNM) is an inherited neuromuscular disorder characterised by clinical features of a congenital myopathy and centrally placed nuclei on muscle biopsy. The incidence of X-linked myotubular myopathy is estimated at 2/100000 male births but epidemiological data for other forms are not currently available. The clinical picture is highly variable. The X-linked form usually gives rise to a severe phenotype in males presenting at birth with marked weakness and hypotonia, external ophthalmoplegia and respiratory failure. Signs of antenatal onset comprise reduced foetal movements, polyhydramnios and thinning of the ribs on chest radiographs; birth asphyxia may be the present. Affected infants are often macrosomic, with length above the 90th centile and large head circumference. Testes are frequently undescended. Both autosomal-recessive (AR) and autosomal-dominant (AD) forms differ from the X-linked form regarding age at onset, severity, clinical characteristics and prognosis. In general, AD forms have a later onset and milder course than the X-linked form, and the AR form is intermediate in both respects. Mutations in the myotubularin (MTM1) gene on chromosome Xq28 have been identified in the majority of patients with the X-linked recessive form, whilst AD and AR forms have been associated with mutations in the dynamin 2 (DNM2) gene on chromosome 19p13.2 and the amphiphysin 2 (BIN1) gene on chromosome 2q14, respectively. Single cases with features of CNM have been associated with mutations in the skeletal muscle ryanodine receptor (RYR1) and the hJUMPY (MTMR14) genes. Diagnosis is based on typical histopathological findings on muscle biopsy in combination with suggestive clinical features; muscle magnetic resonance imaging may complement clinical assessment and inform genetic testing in cases with equivocal features. Genetic counselling should be offered to all patients and families in whom a diagnosis of CNM has been made. The main differential diagnoses include congenital myotonic dystrophy and other conditions with severe neonatal hypotonia. Management of CNM is mainly supportive, based on a multidisciplinary approach. Whereas the X-linked form due to MTM1 mutations is often fatal in infancy, dominant forms due to DNM2 mutations and some cases of the recessive BIN1-related form appear to be associated with an overall more favourable prognosis.
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Affiliation(s)
- Heinz Jungbluth
- Department of Paediatric Neurology, Neuromuscular Service, Evelina Children's Hospital, St Thomas' Hospital, London, UK.
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Abstract
This review focuses on congenital myopathies, a distinct but markedly heterogeneous group of muscle disorders that present with muscle weakness and typically appear at birth or in infancy. These myopathies have characteristic histopathologic abnormalities on muscle biopsy, allowing a preliminary morphologic classification. Advances in molecular genetics have allowed a more rational classification of these disorders and have reshuffled taxonomy for some of these conditions. Here, we focus on recent research advances in specific congenital myopathies, including nemaline myopathy, myotubular myopathy, centronuclear myopathy, central core myopathy, multi-minicore myopathy, congenital fiber-type disproportion myopathy, and hyaline body myopathy. Scientific progress has not only elucidated the pathologic mechanisms of these disorders, but it has also provided the basis for therapeutic strategies.
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Affiliation(s)
- Adele D'Amico
- Ospedale Bambino Gesù Research Chidren's Hospital, P.za S. Onofrio, 4, 00165 Rome, Italy
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9
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Abstract
Like all mammalian tissues, skeletal muscle is dependent on membrane traffic for proper development and homeostasis. This fact is underscored by the observation that several human diseases of the skeletal muscle are caused by mutations in gene products of the membrane trafficking machinery. An examination of these diseases and the proteins that underlie them is instructive both in terms of determining disease pathogenesis and of understanding the normal aspects of muscle biology regulated by membrane traffic. This review highlights our current understanding of the trafficking genes responsible for human myopathies.
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Affiliation(s)
- James J Dowling
- Department of Pediatrics, University of Michigan Medical Center, Ann Arbor, MI 48109, USA.
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Jungbluth H, Zhou H, Sewry CA, Robb S, Treves S, Bitoun M, Guicheney P, Buj-Bello A, Bönnemann C, Muntoni F. Centronuclear myopathy due to a de novo dominant mutation in the skeletal muscle ryanodine receptor (RYR1) gene. Neuromuscul Disord 2007; 17:338-45. [PMID: 17376685 DOI: 10.1016/j.nmd.2007.01.016] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2006] [Revised: 01/09/2007] [Accepted: 01/22/2007] [Indexed: 11/29/2022]
Abstract
Centronuclear myopathy is a genetically heterogeneous congenital myopathy. Whilst mutations in the myotubularin (MTM1) gene are implicated in the X-linked variant, mutations in the dynamin 2 (DNM2) gene have been recently associated with dominant inheritance. We report a 16-year-old girl with clinical features of a congenital myopathy and external ophthalmoplegia. Multiple central nuclei affecting up to 50% of fibres and central accumulation of oxidative enzyme stains were the most prominent findings on muscle biopsy obtained at 1 year. However, some core-like areas appeared on repeat biopsy 8 years later; in addition, muscle MRI was compatible with the pattern we previously reported in patients with mutations in the skeletal muscle ryanodine receptor (RYR1) gene. Mutational analysis identified a de novo dominant RYR1 missense mutation (c.12335C>T; Ser4112Leu) affecting a highly conserved domain of the protein. Our findings expand the phenotypical spectrum associated with RYR1 mutations and indicate that RYR1 screening should be considered in centronuclear myopathy patients without MTM1 or DNM2 mutations; muscle MRI may aid selection of appropriate genetic testing.
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MESH Headings
- Adolescent
- Calcium/metabolism
- Cresols/pharmacology
- DNA Mutational Analysis/methods
- Dose-Response Relationship, Drug
- Female
- Genes, Dominant/genetics
- Humans
- Leucine/genetics
- Magnetic Resonance Imaging/methods
- Muscle, Skeletal/drug effects
- Muscle, Skeletal/metabolism
- Muscle, Skeletal/pathology
- Muscle, Skeletal/physiopathology
- Mutation, Missense
- Myopathies, Structural, Congenital/genetics
- Myopathies, Structural, Congenital/pathology
- Myopathies, Structural, Congenital/physiopathology
- Potassium Chloride/pharmacology
- Ryanodine Receptor Calcium Release Channel/genetics
- Serine/genetics
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Affiliation(s)
- Heinz Jungbluth
- Dubowitz Neuromuscular Centre, Imperial College, Hammersmith Hospital, Du Cane Road, London W12 0NN, UK.
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Affiliation(s)
- Nigel G Laing
- Centre for Medical Research, University of Western Australia, West Australian Institute for Medical Research, Nedlands, Western Australia, Australia
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12
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Marian AJ, Willerson JT. Cardiac Involvement in Skeletal Myopathies and Neuromuscular Disorders. CARDIOVASCULAR MEDICINE 2007. [DOI: 10.1007/978-1-84628-715-2_115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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13
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Schessl J, Medne L, Hu Y, Zou Y, Brown MJ, Huse JT, Torigian DA, Jungbluth H, Goebel HH, Bönnemann CG. MRI in DNM2-related centronuclear myopathy: evidence for highly selective muscle involvement. Neuromuscul Disord 2006; 17:28-32. [PMID: 17134899 DOI: 10.1016/j.nmd.2006.09.013] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2006] [Revised: 08/15/2006] [Accepted: 09/04/2006] [Indexed: 11/18/2022]
Abstract
Dynamin 2 has recently been recognized as a causative gene for the autosomal dominant form of centronuclear myopathy (dominant centronuclear myopathy). Here we report an affected father and daughter with dynamin 2 related AD CNM with predominantly distal onset of weakness. In addition to the diagnostic central location of myonuclei the muscle biopsy also showed core-like structures. Muscle MRI in the lower leg revealed prominent involvement of the soleus, but also of the gastrocnemius and the tibialis anterior whereas in the thigh there was a consistent pattern of selective involvement of adductor longus, semimembranosus, biceps femoris, rectus femoris, and vastus intermedius with relative sparing of vastus lateralis and medialis, sartorius, gracilis, and partly of the semitendinosus. These characteristic findings on muscle MRI confirm similar findings reported for CT imaging in dynamin 2 related dominant centronuclear myopathy and may help to differentiate this disorder from central core disease and other myopathies.
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Affiliation(s)
- Joachim Schessl
- Division of Neurology, The Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA
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Manta P, Mamali I, Zambelis T, Aquaviva T, Kararizou E, Kalfakis N. Immunocytochemical study of cytoskeletal proteins in centronuclear myopathies. Acta Histochem 2006; 108:271-6. [PMID: 16893562 DOI: 10.1016/j.acthis.2006.05.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2005] [Revised: 12/25/2005] [Accepted: 05/06/2006] [Indexed: 10/24/2022]
Abstract
The developmental status of muscle fibers was investigated in three cases of myotubular myopathy: one infant with the X-linked recessive form and two adult brothers with the autosomal, probably recessive, form of the disease. The presence of the developmentally regulated proteins desmin, vimentin and dystrophin was investigated by immunocytochemistry with the use of monoclonal antibodies. In the X-linked case, intense immunolabelling for vimentin and desmin was observed in the nuclear area of a great number of muscle fibers, while a few others showed sarcoplasmic dystrophin immunolabelling or were dystrophin-negative. In the adult cases, strong desmin immunoreactivity was observed, but only a few fibers labelled for vimentin. Dystrophin sarcolemmal immunolabelling was normal, but in some fibers dystrophin was observed in the area of the central nucleus. These findings are supportive of a maturational arrest of muscle fibers in the X-linked cases and possibly indicative of a similar mechanism in the adult form of centronuclear myopathy in these patients.
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Affiliation(s)
- Panajota Manta
- Department of Neurology, National University, Eginition Hospital, 74 Vas. Sofias Ave., Athens GR-115 28, Greece
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Michell RH, Heath VL, Lemmon MA, Dove SK. Phosphatidylinositol 3,5-bisphosphate: metabolism and cellular functions. Trends Biochem Sci 2005; 31:52-63. [PMID: 16364647 DOI: 10.1016/j.tibs.2005.11.013] [Citation(s) in RCA: 180] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2005] [Revised: 10/26/2005] [Accepted: 11/25/2005] [Indexed: 11/16/2022]
Abstract
Polyphosphoinositides (PPIn) are low-abundance membrane phospholipids that each bind to a distinctive set of effector proteins and, thereby, regulate a characteristic suite of cellular processes. Major functions of phosphatidylinositol 3,5-bisphosphate [PtdIns(3,5)P(2)] are in membrane and protein trafficking, and in pH control in the endosome-lysosome axis. Recently identified PtdIns(3,5)P(2) effectors include a family of novel beta-propeller proteins, for which we propose the name PROPPINs [for beta-propeller(s) that binds PPIn], and possibly proteins of the epsin and CHMP (charged multi-vesicular body proteins) families. All eukaryotes, with the exception of some pathogenic protists and microsporidians, possess proteins needed for the formation, metabolism and functions of PtdIns(3,5)P(2). The importance of PtdIns(3,5)P(2) for normal cell function is underscored by recent evidence for its involvement in mammalian cell responses to insulin and for PtdIns(3,5)P(2) dysfunction in the human genetic conditions X-linked myotubular myopathy, Type-4B Charcot-Marie-Tooth disease and fleck corneal dystrophy.
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Affiliation(s)
- Robert H Michell
- School of Biosciences, University of Birmingham, Birmingham B15 2TT, UK.
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Cox K, Gattas M, Harvey P, Dolphin C, Friend K, Yu S. X-linked myotubular myopathy: mutation R69C identified in a family with multiple neonatal deaths. Clin Genet 2005; 67:441-2. [PMID: 15811014 DOI: 10.1111/j.1399-0004.2005.00433.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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