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Napolitano F, Terracciano C, Bruno G, De Blasiis P, Lombardi L, Gialluisi A, Gianfrancesco F, De Giovanni D, Tummolo A, Di Iorio G, Limongelli G, Esposito T, Melone MAB, Sampaolo S. Novel autophagic vacuolar myopathies: Phenotype and genotype features. Neuropathol Appl Neurobiol 2021; 47:664-678. [PMID: 33393119 DOI: 10.1111/nan.12690] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 12/14/2020] [Accepted: 12/28/2020] [Indexed: 12/20/2022]
Abstract
BACKGROUND Autophagic vacuolar myopathies (AVMs) are an emerging group of heterogeneous myopathies sharing histopathological features on muscle pathology, in which autophagic vacuoles are the pathognomonic morphologic hallmarks. Glycogen storage disease type II (GSDII) caused by lysosomal acid α-glucosidase (GAA) deficiency is the best-characterised AVM. AIMS This study aimed to investigate the mutational profiling of seven neuromuscular outpatients sharing clinical, myopathological and biochemical findings with AVMs. METHODS We applied a diagnostic protocol, recently published by our research group for suspected late-onset GSDII (LO-GSDII), including counting PAS-positive lymphocytes on blood smears, dried blood spot (DBS)-GAA, muscle biopsy histological and immunofluorescence studies, GAA activity assay and expression studies on muscle homogenate, GAA sequencing, GAA multiplex ligation-dependent probe amplification (MLPA) and whole exome sequencing (WES). RESULTS The patients had a limb girdle-like muscular pattern with persistent hyperCKaemia; vacuolated PAS-positive lymphocytes, glycogen accumulation and impaired autophagy at muscle biopsy. Decreased GAA activity was also measured. While GAA sequencing identified no pathogenic mutations, WES approach allowed us to identify for each patient an unexpected mutational pattern in genes cooperating in lysosomal-autophagic machinery, some of which have never been linked to human diseases. CONCLUSIONS Our data suggest that reduced GAA activity may occur in any condition of impaired autophagy and that WES approach is advisable in all genetically undefined cases of autophagic myopathy. Therefore, deficiency of GAA activity and PAS-positive lymphocytes should be considered as AVM markers together with LC3/p62-positive autophagic vacuoles.
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Affiliation(s)
- Filomena Napolitano
- Department of Advanced Medical and Surgical Sciences, 2nd Division of Neurology, Center for Rare Diseases and Inter University Center for Research in Neurosciences, University of Campania "Luigi Vanvitelli", Naples, Italy.,Institute of Genetics and Biophysics "Adriano Buzzati-Traverso", National Research Council, Naples, Italy
| | - Chiara Terracciano
- Department of Advanced Medical and Surgical Sciences, 2nd Division of Neurology, Center for Rare Diseases and Inter University Center for Research in Neurosciences, University of Campania "Luigi Vanvitelli", Naples, Italy.,Neurology Unit, Guglielmo da Saliceto Hospital, Piacenza, Italy
| | - Giorgia Bruno
- Department of Advanced Medical and Surgical Sciences, 2nd Division of Neurology, Center for Rare Diseases and Inter University Center for Research in Neurosciences, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Paolo De Blasiis
- Department of Advanced Medical and Surgical Sciences, 2nd Division of Neurology, Center for Rare Diseases and Inter University Center for Research in Neurosciences, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Luca Lombardi
- Department of Advanced Medical and Surgical Sciences, 2nd Division of Neurology, Center for Rare Diseases and Inter University Center for Research in Neurosciences, University of Campania "Luigi Vanvitelli", Naples, Italy
| | | | - Fernando Gianfrancesco
- Institute of Genetics and Biophysics "Adriano Buzzati-Traverso", National Research Council, Naples, Italy
| | - Donatella De Giovanni
- Metabolic Diseases and Clinical Genetics Unit, Children's Hospital Giovanni XXIII, Bari, Italy
| | - Albina Tummolo
- Metabolic Diseases and Clinical Genetics Unit, Children's Hospital Giovanni XXIII, Bari, Italy
| | - Giuseppe Di Iorio
- Department of Advanced Medical and Surgical Sciences, 2nd Division of Neurology, Center for Rare Diseases and Inter University Center for Research in Neurosciences, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Giuseppe Limongelli
- Department of Translational Medical Sciences, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Teresa Esposito
- Institute of Genetics and Biophysics "Adriano Buzzati-Traverso", National Research Council, Naples, Italy.,IRCCS INM Neuromed, Pozzilli, IS, Italy
| | - Mariarosa Anna Beatrice Melone
- Department of Advanced Medical and Surgical Sciences, 2nd Division of Neurology, Center for Rare Diseases and Inter University Center for Research in Neurosciences, University of Campania "Luigi Vanvitelli", Naples, Italy.,Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, Temple University, Philadelphia, Pennsylvania, USA
| | - Simone Sampaolo
- Department of Advanced Medical and Surgical Sciences, 2nd Division of Neurology, Center for Rare Diseases and Inter University Center for Research in Neurosciences, University of Campania "Luigi Vanvitelli", Naples, Italy
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Chahal HS, Wu W, Ransohoff KJ, Yang L, Hedlin H, Desai M, Lin Y, Dai HJ, Qureshi AA, Li WQ, Kraft P, Hinds DA, Tang JY, Han J, Sarin KY. Genome-wide association study identifies 14 novel risk alleles associated with basal cell carcinoma. Nat Commun 2016; 7:12510. [PMID: 27539887 PMCID: PMC4992160 DOI: 10.1038/ncomms12510] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Accepted: 07/08/2016] [Indexed: 12/18/2022] Open
Abstract
Basal cell carcinoma (BCC) is the most common cancer worldwide with an annual incidence of 2.8 million cases in the United States alone. Previous studies have demonstrated an association between 21 distinct genetic loci and BCC risk. Here, we report the results of a two-stage genome-wide association study of BCC, totalling 17,187 cases and 287,054 controls. We confirm 17 previously reported loci and identify 14 new susceptibility loci reaching genome-wide significance (P<5 × 10(-8), logistic regression). These newly associated SNPs lie within predicted keratinocyte regulatory elements and in expression quantitative trait loci; furthermore, we identify candidate genes and non-coding RNAs involved in telomere maintenance, immune regulation and tumour progression, providing deeper insight into the pathogenesis of BCC.
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Affiliation(s)
- Harvind S. Chahal
- Department of Dermatology, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Wenting Wu
- Department of Epidemiology, Richard M. Fairbanks School of Public Health, Melvin & Bren Simon Cancer Center, Indiana University, Indianapolis, Indiana 46202, USA
| | - Katherine J. Ransohoff
- Department of Dermatology, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Lingyao Yang
- Department of Medicine (Quantitative Sciences Unit), Stanford University School of Medicine, Stanford, California 94305, USA
| | - Haley Hedlin
- Department of Medicine (Quantitative Sciences Unit), Stanford University School of Medicine, Stanford, California 94305, USA
| | - Manisha Desai
- Department of Medicine (Quantitative Sciences Unit), Stanford University School of Medicine, Stanford, California 94305, USA
| | - Yuan Lin
- Department of Epidemiology, Richard M. Fairbanks School of Public Health, Melvin & Bren Simon Cancer Center, Indiana University, Indianapolis, Indiana 46202, USA
| | - Hong-Ji Dai
- Department of Epidemiology, Richard M. Fairbanks School of Public Health, Melvin & Bren Simon Cancer Center, Indiana University, Indianapolis, Indiana 46202, USA
- Department of Epidemiology and Biostatistics, Tianjin Medical University Cancer Hospital and Institute, National Clinical Research Center for Cancer, Tianjin & Key Laboratory of Cancer Prevention and Therapy, Tianjin, China
| | - Abrar A. Qureshi
- Department of Dermatology, Warren Alpert Medical School, Brown University, Providence, Rhode Island 02903, USA
- Department of Epidemiology, School of Public Health, Brown University, Providence, Rhode Island 02903, USA
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Wen-Qing Li
- Department of Dermatology, Warren Alpert Medical School, Brown University, Providence, Rhode Island 02903, USA
- Department of Epidemiology, School of Public Health, Brown University, Providence, Rhode Island 02903, USA
| | - Peter Kraft
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, USA
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, USA
| | | | - Jean Y. Tang
- Department of Dermatology, Stanford University School of Medicine, Stanford, California 94305, USA
| | - Jiali Han
- Department of Epidemiology, Richard M. Fairbanks School of Public Health, Melvin & Bren Simon Cancer Center, Indiana University, Indianapolis, Indiana 46202, USA
- Department of Epidemiology and Biostatistics, Tianjin Medical University Cancer Hospital and Institute, National Clinical Research Center for Cancer, Tianjin & Key Laboratory of Cancer Prevention and Therapy, Tianjin, China
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts 02115, USA
| | - Kavita Y. Sarin
- Department of Dermatology, Stanford University School of Medicine, Stanford, California 94305, USA
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Reevaluation of the requirement for TIP47 in human immunodeficiency virus type 1 envelope glycoprotein incorporation. J Virol 2013; 87:3561-70. [PMID: 23325685 DOI: 10.1128/jvi.03299-12] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Incorporation of the human immunodeficiency virus type 1 (HIV-1) envelope glycoproteins into assembling particles is crucial for virion infectivity. Genetic and biochemical data indicate that the matrix (MA) domain of Gag and the cytoplasmic tail of the transmembrane glycoprotein gp41 play an important role in coordinating Env incorporation; however, the molecular mechanism and possible role of host factors in this process remain to be defined. Recent studies suggested that Env incorporation is mediated by interactions between matrix and tail-interacting protein of 47 kDa (TIP47; also known as perilipin-3 and mannose-6-phosphate receptor-binding protein 1), a member of the perilipin, adipophilin, TIP47 (PAT) family of proteins implicated in protein sorting and lipid droplet biogenesis. We have confirmed by nuclear magnetic resonance spectroscopy titration experiments and surface plasmon resonance that MA binds TIP47. We also reevaluated the role of TIP47 in HIV-1 Env incorporation in HeLa cells and in the Jurkat T-cell line. In HeLa cells, TIP47 overexpression or RNA interference (RNAi)-mediated depletion had no significant effect on HIV-1 Env incorporation, virus release, or particle infectivity. Similarly, depletion of TIP47 in Jurkat cells did not impair HIV-1 Env incorporation, virus release, infectivity, or replication. Our results thus do not support a role for TIP47 in HIV-1 Env incorporation or virion infectivity.
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Pfeffer SR. Multiple routes of protein transport from endosomes to the trans Golgi network. FEBS Lett 2009; 583:3811-6. [PMID: 19879268 DOI: 10.1016/j.febslet.2009.10.075] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2009] [Revised: 10/27/2009] [Accepted: 10/27/2009] [Indexed: 10/20/2022]
Abstract
Proteins use multiple routes for transport from endosomes to the Golgi complex. Shiga and cholera toxins and TGN38/46 are routed from early and recycling endosomes, while mannose 6-phosphate receptors are routed from late endosomes. The identification of distinct molecular requirements for each of these pathways makes it clear that mammalian cells have evolved more complex targeting mechanisms and routes than previously anticipated.
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Affiliation(s)
- Suzanne R Pfeffer
- Department of Biochemistry, 279 Campus Drive B400, Stanford University School of Medicine, Stanford, CA 94305-5307, USA.
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Tao X, Jihong Y, Li G, Bin F, Yi Z, Xiaodong C, Peichao Z, Yang Z. Cloning, chromosome mapping and expression pattern of porcine PLINand M6PRBP1genes. Genet Sel Evol 2008. [DOI: 10.1051/gse:2007045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Saito K, Williams S, Bulankina A, Höning S, Mustelin T. Association of Protein-tyrosine Phosphatase MEG2 via Its Sec14p Homology Domain with Vesicle-trafficking Proteins. J Biol Chem 2007; 282:15170-8. [PMID: 17387180 DOI: 10.1074/jbc.m608682200] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
The protein-tyrosine phosphatase PTPMEG2 is located on the cytoplasmic face of the enclosing membrane of secretory vesicles, where it regulates vesicle size by promoting homotypic vesicle fusion by dephosphorylating N-ethylmaleimide-sensitive factor, a key regulator of vesicle fusion. Here we address the question of how PTPMEG2 is targeted to this subcellular location. Using a series of deletion mutants, we pinpointed the N-terminal Sec14p homology (SEC14) domain of PTPMEG2, residues 1-261, as the region containing the secretory vesicle targeting signal. This domain, alone or appended to a heterologous protein, was localized to intracellular vesicle membranes. Yeast two-hybrid screening identified a number of secretory vesicle proteins that interacted directly with the SEC14 domain of PTPMEG2, providing a mechanism for PTPMEG2 targeting to secretory vesicles. Two such proteins, mannose 6-phosphate receptor-interacting protein TIP47 and Arfaptin2, were found to alter PTPMEG2 localization when overexpressed, and elimination of TIP47 resulted in loss of PTPMEG2 function. We conclude that the N terminus of PTPMEG2 is necessary for the targeting of this phosphatase to the secretory vesicle compartment by association with other proteins involved in intracellular transport.
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Affiliation(s)
- Kan Saito
- Program on Inflammatory Disease Research, Infectious and Inflammatory Disease Center, and Program of Signal Transduction, Cancer Center, The Burnham Institute for Medical Research, La Jolla, California 92037, USA
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Reddy JV, Burguete AS, Sridevi K, Ganley IG, Nottingham RM, Pfeffer SR. A functional role for the GCC185 golgin in mannose 6-phosphate receptor recycling. Mol Biol Cell 2006; 17:4353-63. [PMID: 16885419 PMCID: PMC1635343 DOI: 10.1091/mbc.e06-02-0153] [Citation(s) in RCA: 105] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Mannose 6-phosphate receptors (MPRs) deliver newly synthesized lysosomal enzymes to endosomes and then recycle to the Golgi. MPR recycling requires Rab9 GTPase; Rab9 recruits the cytosolic adaptor TIP47 and enhances its ability to bind to MPR cytoplasmic domains during transport vesicle formation. Rab9-bearing vesicles then fuse with the trans-Golgi network (TGN) in living cells, but nothing is known about how these vesicles identify and dock with their target. We show here that GCC185, a member of the Golgin family of putative tethering proteins, is a Rab9 effector that is required for MPR recycling from endosomes to the TGN in living cells, and in vitro. GCC185 does not rely on Rab9 for its TGN localization; depletion of GCC185 slightly alters the Golgi ribbon but does not interfere with Golgi function. Loss of GCC185 triggers enhanced degradation of mannose 6-phosphate receptors and enhanced secretion of hexosaminidase. These data assign a specific pathway to an interesting, TGN-localized protein and suggest that GCC185 may participate in the docking of late endosome-derived, Rab9-bearing transport vesicles at the TGN.
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Affiliation(s)
- Jonathan V. Reddy
- Department of Biochemistry, Stanford University School of Medicine, Stanford, CA 94305-5307
| | | | - Khambhampaty Sridevi
- Department of Biochemistry, Stanford University School of Medicine, Stanford, CA 94305-5307
| | - Ian G. Ganley
- Department of Biochemistry, Stanford University School of Medicine, Stanford, CA 94305-5307
| | - Ryan M. Nottingham
- Department of Biochemistry, Stanford University School of Medicine, Stanford, CA 94305-5307
| | - Suzanne R. Pfeffer
- Department of Biochemistry, Stanford University School of Medicine, Stanford, CA 94305-5307
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