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Khan S, Umair M, Abbas S, Ali U, Zaman G, Ansar M, Wang R, Zhang X, Houlden H, Harlalka GV, Gul A. Overlapping neurological phenotypes in two extended consanguineous families with novel variants in the CNTNAP1 and ADGRG1 genes. J Gene Med 2023; 25:e3513. [PMID: 37178061 DOI: 10.1002/jgm.3513] [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: 01/05/2023] [Revised: 03/31/2023] [Accepted: 04/03/2023] [Indexed: 05/15/2023] Open
Abstract
BACKGROUND Population diversity is important and rare disease isolates can frequently reveal novel homozygous or biallelic mutations that lead to expanded clinical heterogeneity, with diverse clinical presentations. METHODS The present study describes two consanguineous families with a total of seven affected individuals suffering from a clinically similar severe syndromic neurological disorder, with abnormal development and central nervous system (CNS) and peripheral nervous system (PNS) abnormalities. Whole exome sequencing (WES) and Sanger sequencing followed by 3D protein modeling was performed to identify the disease-causing gene. RNA was extracted from the fresh blood of both families affected and healthy individuals. RESULTS The families were clinically assessed in the field in different regions of Khyber Pakhtunkhwa. Magnetic resonance imagining was obtained in the probands and blood was collected for DNA extraction and WES was performed. Sanger sequencing confirmed a homozygous, likely pathogenic mutation (GRCh38: chr17:42684199G>C; (NM_003632.3): c.333G>C);(NP_003623.1): p.(Trp111Cys) in the CNTNAP1 gene in family A, previously associated with Congenital Hypo myelinating Neuropathy 3 (CHN3; OMIM # 618186) and a novel nonsense variant in family B, (GRCh38: chr16: 57654086C>T; NC_000016.10 (NM_001370440.1): c.721C>T); (NP_001357369.1): p.(Gln241Ter) in the ADGRG1 gene previously associated with bilateral frontoparietal polymicrogyria (OMIM # 606854); both families have extended CNS and PNS clinical manifestations. In addition, 3D protein modeling was performed for the missense variant, p.(Trp111Cys), identified in the CNTNAP1, suggesting extensive secondary structure changes that might lead to improper function or downstream signaling. No RNA expression was observed in both families affected and healthy individuals hence showing that these genes are not expressed in blood. CONCLUSIONS In the present study, two novel biallelic variants in the CNTNAP1 and ADGRG1 genes in two different consanguineous families with a clinical overlap in the phenotype were identified. Thus, the clinical and mutation spectrum is expanded to provide further evidence that CNTNAP1 and ADGRG1 are very important for widespread neurological development.
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Affiliation(s)
- Shazia Khan
- Department of Biological Sciences, International Islamic University, Islamabad, Pakistan
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
- Medical Research, RILD Wellcome Wolfson Centre (Level 4), Royal Devon and Exeter NHS Foundation Trust, Exeter, Devon, UK
- Hafeez Institute of Medical Sciences, Islamabad, Pakistan
| | - Muhammad Umair
- Medical Genomics Research Department, King Abdullah International Medical Research Center (KAIMRC), King Saud Bin Abdulaziz University for Health Sciences, Ministry of National Guard Health Affairs (MNGH), Riyadh, Saudi Arabia
- Department of Life Sciences, School of Science, University of Management and Technology (UMT), Lahore, Pakistan
| | - Safdar Abbas
- Department of Biological Science, Dartmouth College, Hanover, NH, USA
| | - Uroba Ali
- Department of Biological Sciences, International Islamic University, Islamabad, Pakistan
| | - Gohar Zaman
- Department of Computer Science, Abbottabad University of Science and Technology, Havelian, Abbottabad, Pakistan
| | - Muhammad Ansar
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Rongrong Wang
- McKusick-Zhang Center for Genetic Medicine, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, China
| | - Xue Zhang
- McKusick-Zhang Center for Genetic Medicine, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, China
- The Research Center for Medical Genomics, China Medical University, Shenyang, China
| | - Henry Houlden
- Department of Neuromuscular Disorder, UCL Institute of Neurology, London, UK
| | - Gaurav V Harlalka
- Medical Research, RILD Wellcome Wolfson Centre (Level 4), Royal Devon and Exeter NHS Foundation Trust, Exeter, Devon, UK
- Department of Pharmacology, Samarth College of Pharmacy, Deulgaon Raja, Dist. Buldana, Maharashtra, India
| | - Asma Gul
- Department of Biological Sciences, International Islamic University, Islamabad, Pakistan
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2
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Rawlins LE, Almousa H, Khan S, Collins SC, Milev MP, Leslie J, Saint-Dic D, Khan V, Hincapie AM, Day JO, McGavin L, Rowley C, Harlalka GV, Vancollie VE, Ahmad W, Lelliott CJ, Gul A, Yalcin B, Crosby AH, Sacher M, Baple EL. Biallelic variants in TRAPPC10 cause a microcephalic TRAPPopathy disorder in humans and mice. PLoS Genet 2022; 18:e1010114. [PMID: 35298461 PMCID: PMC8963566 DOI: 10.1371/journal.pgen.1010114] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 03/29/2022] [Accepted: 02/20/2022] [Indexed: 11/25/2022] Open
Abstract
The highly evolutionarily conserved transport protein particle (TRAPP) complexes (TRAPP II and III) perform fundamental roles in subcellular trafficking pathways. Here we identified biallelic variants in TRAPPC10, a component of the TRAPP II complex, in individuals with a severe microcephalic neurodevelopmental disorder. Molecular studies revealed a weakened interaction between mutant TRAPPC10 and its putative adaptor protein TRAPPC2L. Studies of patient lymphoblastoid cells revealed an absence of TRAPPC10 alongside a concomitant absence of TRAPPC9, another key TRAPP II complex component associated with a clinically overlapping neurodevelopmental disorder. The TRAPPC9/10 reduction phenotype was recapitulated in TRAPPC10-/- knockout cells, which also displayed a membrane trafficking defect. Notably, both the reduction in TRAPPC9 levels and the trafficking defect in these cells could be rescued by wild type but not mutant TRAPPC10 gene constructs. Moreover, studies of Trappc10-/- knockout mice revealed neuroanatomical brain defects and microcephaly, paralleling findings seen in the human condition as well as in a Trappc9-/- mouse model. Together these studies confirm autosomal recessive TRAPPC10 variants as a cause of human disease and define TRAPP-mediated pathomolecular outcomes of importance to TRAPPC9 and TRAPPC10 mediated neurodevelopmental disorders in humans and mice. Microcephalic neurodevelopmental disorders are a group of conditions that are often inherited in families, involving small head size and abnormal brain development and function. This often results in delayed development of an affected child, affecting their movement, language and/or non-verbal communication and learning, as well as seizures and neuropsychiatric problems. A group of proteins called the transport protein particles (TRAPPs) are important for the transport of cargos inside cells. Alterations within a number of the TRAPP proteins have previously been associated with human inherited diseases called the ‘TRAPPopathies’, which involve neurodevelopmental and skeletal abnormalities. Here we show that TRAPPC10 gene alterations cause a new TRAPPopathy microcephalic neurodevelopmental disorder, and we provide a detailed clinical description of the condition termed ‘TRAPPC10-related disorder’. Our studies in mice lacking the TRAPPC10 gene identified similar features to those of affected humans, including small brain size and skeletal abnormalities. Our molecular studies showed that an affected individual with an alteration in the TRAPPC10 gene has no functional TRAPPC10 protein in their cells, which in turn causes a reduction in levels of another important TRAPP molecule, TRAPPC9. Cells lacking TRAPPC10 also display abnormalities in cellular transport processes. Together our data confirm alterations in TRAPPC10 as a cause of a microcephalic neurodevelopmental disorder in both humans and mice.
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Affiliation(s)
- Lettie E. Rawlins
- RILD Wellcome Wolfson Medical Research Centre, RD&E (Wonford) NHS Foundation Trust, University of Exeter Medical School, Exeter, United Kingdom
- Peninsula Clinical Genetics Service, Royal Devon & Exeter Hospital (Heavitree), Exeter, United Kingdom
| | - Hashem Almousa
- Department of Biology, Concordia University, Montreal, Quebec, Canada
| | - Shazia Khan
- RILD Wellcome Wolfson Medical Research Centre, RD&E (Wonford) NHS Foundation Trust, University of Exeter Medical School, Exeter, United Kingdom
- Department of Biological Sciences, International Islamic University, Islamabad, Pakistan
| | - Stephan C. Collins
- Institute of Genetics and Molecular and Cellular Biology, Inserm, Illkirch, France
- Inserm, University of Bourgogne Franche-Comté, Dijon, France
| | - Miroslav P. Milev
- Department of Biology, Concordia University, Montreal, Quebec, Canada
| | - Joseph Leslie
- RILD Wellcome Wolfson Medical Research Centre, RD&E (Wonford) NHS Foundation Trust, University of Exeter Medical School, Exeter, United Kingdom
| | - Djenann Saint-Dic
- Department of Biology, Concordia University, Montreal, Quebec, Canada
| | - Valeed Khan
- Department of Molecular Diagnostics, Rehman Medical Institute, Peshawar, Pakistan
| | | | - Jacob O. Day
- RILD Wellcome Wolfson Medical Research Centre, RD&E (Wonford) NHS Foundation Trust, University of Exeter Medical School, Exeter, United Kingdom
- Faculty of Health, University of Plymouth, Plymouth, United Kingdom
| | - Lucy McGavin
- University Hospitals Plymouth NHS Trust, Plymouth, United Kingdom
| | | | - Gaurav V. Harlalka
- RILD Wellcome Wolfson Medical Research Centre, RD&E (Wonford) NHS Foundation Trust, University of Exeter Medical School, Exeter, United Kingdom
- Department of Pharmacology, Rajarshi Shahu College of Pharmacy, Malvihir, Buldana, India
| | | | - Wasim Ahmad
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | | | - Asma Gul
- Department of Biological Sciences, International Islamic University, Islamabad, Pakistan
| | - Binnaz Yalcin
- Institute of Genetics and Molecular and Cellular Biology, Inserm, Illkirch, France
- Inserm, University of Bourgogne Franche-Comté, Dijon, France
| | - Andrew H. Crosby
- RILD Wellcome Wolfson Medical Research Centre, RD&E (Wonford) NHS Foundation Trust, University of Exeter Medical School, Exeter, United Kingdom
| | - Michael Sacher
- Department of Biology, Concordia University, Montreal, Quebec, Canada
- Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec, Canada
| | - Emma L. Baple
- RILD Wellcome Wolfson Medical Research Centre, RD&E (Wonford) NHS Foundation Trust, University of Exeter Medical School, Exeter, United Kingdom
- Peninsula Clinical Genetics Service, Royal Devon & Exeter Hospital (Heavitree), Exeter, United Kingdom
- * E-mail:
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3
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Lin S, Sanchez-Bretaño A, Leslie JS, Williams KB, Lee H, Thomas NS, Callaway J, Deline J, Ratnayaka JA, Baralle D, Schmitt MA, Norman CS, Hammond S, Harlalka GV, Ennis S, Cross HE, Wenger O, Crosby AH, Baple EL, Self JE. Evidence that the Ser192Tyr/Arg402Gln in cis Tyrosinase gene haplotype is a disease-causing allele in oculocutaneous albinism type 1B (OCA1B). NPJ Genom Med 2022; 7:2. [PMID: 35027574 PMCID: PMC8758782 DOI: 10.1038/s41525-021-00275-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 11/19/2021] [Indexed: 01/09/2023] Open
Abstract
Oculocutaneous albinism type 1 (OCA1) is caused by pathogenic variants in the TYR (tyrosinase) gene which encodes the critical and rate-limiting enzyme in melanin synthesis. It is the most common OCA subtype found in Caucasians, accounting for ~50% of cases worldwide. The apparent 'missing heritability' in OCA is well described, with ~25-30% of clinically diagnosed individuals lacking two clearly pathogenic variants. Here we undertook empowered genetic studies in an extensive multigenerational Amish family, alongside a review of previously published literature, a retrospective analysis of in-house datasets, and tyrosinase activity studies. Together this provides irrefutable evidence of the pathogenicity of two common TYR variants, p.(Ser192Tyr) and p.(Arg402Gln) when inherited in cis alongside a pathogenic TYR variant in trans. We also show that homozygosity for the p.(Ser192Tyr)/p.(Arg402Gln) TYR haplotype results in a very mild, but fully penetrant, albinism phenotype. Together these data underscore the importance of including the TYR p.(Ser192Tyr)/p.(Arg402Gln) in cis haplotype as a pathogenic allele causative of OCA, which would likely increase molecular diagnoses in this missing heritability albinism cohort by 25-50%.
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Affiliation(s)
- Siying Lin
- RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, Barrack Road, Exeter, UK
| | - Aida Sanchez-Bretaño
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK
| | - Joseph S Leslie
- RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, Barrack Road, Exeter, UK
| | - Katie B Williams
- Center for Special Children, Vernon Memorial Healthcare, La Farge, WI, USA
| | - Helena Lee
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK
- Southampton Eye Unit, University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | - N Simon Thomas
- Faculty of Medicine, University of Southampton, Southampton, UK
- Wessex Regional Genetics Laboratory, Salisbury District Hospital, Salisbury, UK
| | - Jonathan Callaway
- Faculty of Medicine, University of Southampton, Southampton, UK
- Wessex Regional Genetics Laboratory, Salisbury District Hospital, Salisbury, UK
| | - James Deline
- Center for Special Children, Vernon Memorial Healthcare, La Farge, WI, USA
| | - J Arjuna Ratnayaka
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK
| | - Diana Baralle
- Human Development and Health, Faculty of Medicine, University of Southampton, Southampton, UK
| | - Melanie A Schmitt
- University of Wisconsin School of Medicine and Public Health, Department of Ophthalmology & Visual Sciences, Madison, WI, USA
| | - Chelsea S Norman
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK
- The Rosalind Franklin Institute, Rutherford Appleton Laboratories, Harwell Science and Innovation Campus, Didcot, UK
| | - Sheri Hammond
- Center for Special Children, Vernon Memorial Healthcare, La Farge, WI, USA
| | - Gaurav V Harlalka
- RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, Barrack Road, Exeter, UK
- Rajarshi Shahu College of Pharmacy, Malvihir, Buldana, India
| | - Sarah Ennis
- Department of Human Genetics and Genomic Medicine, University of Southampton, Southampton, UK
| | - Harold E Cross
- Department of Ophthalmology, University of Arizona College of Medicine, Tucson, AZ, USA
| | - Olivia Wenger
- New Leaf Clinic, PO Box 336, 16014 East Chestnut Street, Mount Eaton, OH, 44691, USA
- Department of Pediatrics, Akron Children's Hospital, 214 West Bowery Street, Akron, OH, 44308, USA
| | - Andrew H Crosby
- RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, Barrack Road, Exeter, UK.
| | - Emma L Baple
- RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, Barrack Road, Exeter, UK.
- Peninsula Clinical Genetics Service, Royal Devon & Exeter Hospital (Heavitree), Gladstone Road, Exeter, UK.
| | - Jay E Self
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, UK.
- Southampton Eye Unit, University Hospital Southampton NHS Foundation Trust, Southampton, UK.
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4
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Khan K, Mehmood S, Liu C, Siddiqui M, Ahmad A, Faiz BY, Chioza BA, Baple EA, Ullah MI, Akram Z, Satti HS, Khan R, Harlalka GV, Jameel M, Akram T, Baig SM, Crosby AH, Hassan MJ, Zhang F, Davis EE, Khan TN. A recurrent rare intronic variant in CAPN3 alters mRNA splicing and causes autosomal recessive limb-girdle muscular dystrophy-1 in three Pakistani pedigrees. Am J Med Genet A 2021; 188:498-508. [PMID: 34697879 DOI: 10.1002/ajmg.a.62545] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 09/01/2021] [Accepted: 10/07/2021] [Indexed: 11/09/2022]
Abstract
Autosomal recessive limb-girdle muscular dystrophy-1 (LGMDR1) is an autosomal recessive disorder characterized by progressive weakness of the proximal limb and girdle muscles. Biallelic mutations in CAPN3 are reported frequently to cause LGMDR1. Here, we describe 11 individuals from three unrelated consanguineous families that present with typical features of LGMDR1 that include proximal muscle wasting, weakness of the upper and lower limbs, and elevated serum creatine kinase. Whole-exome sequencing identified a rare homozygous CAPN3 variant near the exon 2 splice donor site that segregates with disease in all three families. mRNA splicing studies showed partial retention of intronic sequence and subsequent introduction of a premature stop codon (NM_000070.3: c.379 + 3A>G; p.Asp128Glyfs*15). Furthermore, we observe reduced CAPN3 expression in primary dermal fibroblasts derived from an affected individual, suggesting instability and/or nonsense-mediated decay of mutation-bearing mRNA. Genome-wide homozygosity mapping and single-nucleotide polymorphism analysis identified a shared haplotype and supports a possible founder effect for the CAPN3 variant. Together, our data extend the mutational spectrum of LGMDR1 and have implications for improved diagnostics for individuals of Pakistani origin.
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Affiliation(s)
- Kamal Khan
- Center for Human Disease Modeling, Duke University Medical Center, Durham, North Carolina, USA.,Stanley Manne Children's Research Institute, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois, USA.,Human Molecular Genetics Laboratory, Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering College (NIBGE-C), Faisalabad, Pakistan.,Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, Pakistan
| | - Sarmad Mehmood
- Atta-ur-Rahman School of Applied Biosciences, National University of Sciences and Technology, Islamabad, Pakistan
| | - Chunyu Liu
- Obstetrics and Gynecology Hospital, NHC Key Laboratory of Reproduction Regulation (Shanghai Institute for Biomedical and Pharmaceutical Technologies), Institute of Reproduction and Development, Fudan University, Shanghai, China
| | - Maimoona Siddiqui
- Division of Neurology, Shifa International Hospital, Shifa Tameer e Millat University, Islamabad, Pakistan
| | - Arsalan Ahmad
- Division of Neurology, Shifa International Hospital, Shifa Tameer e Millat University, Islamabad, Pakistan
| | - Belqees Yawar Faiz
- Division of Neurology, Shifa International Hospital, Shifa Tameer e Millat University, Islamabad, Pakistan
| | - Barry A Chioza
- RILD Wellcome Wolfson Centre - Level 4, Royal Devon and Exeter NHS Foundation Trust, University of Exeter Medical School, Exeter, UK
| | - Emma A Baple
- RILD Wellcome Wolfson Centre - Level 4, Royal Devon and Exeter NHS Foundation Trust, University of Exeter Medical School, Exeter, UK
| | - Muhammad I Ullah
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Jouf University, Sakaka, Saudi Arabia
| | - Zaineb Akram
- Stem Cell Research Laboratory, AFBMTC, CMH Medical Complex, Rawalpindi, Pakistan
| | - Humayoon S Satti
- Department of Biological Sciences, National University of Medical Sciences, Rawalpindi, Pakistan
| | - Raees Khan
- Department of Biological Sciences, National University of Medical Sciences, Rawalpindi, Pakistan
| | - Gaurav V Harlalka
- RILD Wellcome Wolfson Centre - Level 4, Royal Devon and Exeter NHS Foundation Trust, University of Exeter Medical School, Exeter, UK.,Department of Pharmacology, Rajarshi Shahu College of Pharmacy, Malvihir, Buldana, Maharashtra, India
| | - Muhammad Jameel
- Human Molecular Genetics Laboratory, Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering College (NIBGE-C), Faisalabad, Pakistan
| | - Talia Akram
- Human Molecular Genetics Laboratory, Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering College (NIBGE-C), Faisalabad, Pakistan.,Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, Pakistan
| | - Shahid M Baig
- Human Molecular Genetics Laboratory, Health Biotechnology Division, National Institute for Biotechnology and Genetic Engineering College (NIBGE-C), Faisalabad, Pakistan.,Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, Pakistan.,Pakistan Science Foundation, Islamabad, Pakistan.,Department of Biological and Biomedical Sciences, Aga Khan University, Karachi, Pakistan
| | - Andrew H Crosby
- RILD Wellcome Wolfson Centre - Level 4, Royal Devon and Exeter NHS Foundation Trust, University of Exeter Medical School, Exeter, UK
| | - Muhammad J Hassan
- Atta-ur-Rahman School of Applied Biosciences, National University of Sciences and Technology, Islamabad, Pakistan.,Department of Biological Sciences, National University of Medical Sciences, Rawalpindi, Pakistan
| | - Feng Zhang
- Obstetrics and Gynecology Hospital, NHC Key Laboratory of Reproduction Regulation (Shanghai Institute for Biomedical and Pharmaceutical Technologies), Institute of Reproduction and Development, Fudan University, Shanghai, China
| | - Erica E Davis
- Center for Human Disease Modeling, Duke University Medical Center, Durham, North Carolina, USA.,Stanley Manne Children's Research Institute, Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois, USA.,Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA.,Department of Cell and Developmental Biology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Tahir N Khan
- Center for Human Disease Modeling, Duke University Medical Center, Durham, North Carolina, USA.,Department of Biological Sciences, National University of Medical Sciences, Rawalpindi, Pakistan
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5
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Akbar A, Bint-E-Farrakh M, Crosby AH, Gul A, Harlalka GV. Variants in NIPAL4 and ALOXE3 cause autosomal recessive congenital ichthyosis in Pakistani families. Congenit Anom (Kyoto) 2020; 60:149-150. [PMID: 31883158 DOI: 10.1111/cga.12366] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 12/22/2019] [Accepted: 12/25/2019] [Indexed: 11/30/2022]
Affiliation(s)
- Abida Akbar
- RILD Building, Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, UK.,Department of Biological Sciences, International Islamic University, Islamabad, Pakistan
| | - Muneeba Bint-E-Farrakh
- Department of Biological Sciences, International Islamic University, Islamabad, Pakistan
| | - Andrew H Crosby
- RILD Building, Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, UK
| | - Asma Gul
- Department of Biological Sciences, International Islamic University, Islamabad, Pakistan
| | - Gaurav V Harlalka
- RILD Building, Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, UK.,Rajarshi Shahu College of Pharmacy, Malvihir, Buldana, India
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6
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Khan S, Rawlins LE, Harlalka GV, Umair M, Ullah A, Shahzad S, Javed M, Baple EL, Crosby AH, Ahmad W, Gul A. Homozygous variants in the HEXB and MBOAT7 genes underlie neurological diseases in consanguineous families. BMC Med Genet 2019; 20:199. [PMID: 31852446 PMCID: PMC6921424 DOI: 10.1186/s12881-019-0907-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Accepted: 10/15/2019] [Indexed: 12/20/2022]
Abstract
BACKGROUND Neurological disorders are a common cause of morbidity and mortality within Pakistani populations. It is one of the most important challenges in healthcare, with significant life-long socio-economic burden. METHODS We investigated the cause of disease in three Pakistani families in individuals with unexplained autosomal recessive neurological conditions, using both genome-wide SNP mapping and whole exome sequencing (WES) of affected individuals. RESULTS We identified a homozygous splice site variant (NM_000521:c.445 + 1G > T) in the hexosaminidase B (HEXB) gene confirming a diagnosis of Sandhoff disease (SD; type II GM2-gangliosidosis), an autosomal recessive lysosomal storage disorder caused by deficiency of hexosaminidases in a single family. In two further unrelated families, we identified a homozygous frameshift variant (NM_024298.3:c.758_778del; p.Glu253_Ala259del) in membrane-bound O-acyltransferase family member 7 (MBOAT7) as the likely cause of disease. MBOAT7 gene variants have recently been identified as a cause of intellectual disability (ID), seizures and autistic features. CONCLUSIONS We identified two metabolic disorders of lipid biosynthesis within three Pakistani families presenting with undiagnosed neurodevelopmental conditions. These findings enabled an accurate neurological disease diagnosis to be provided for these families, facilitating disease management and genetic counselling within this population. This study consolidates variation within MBOAT7 as a cause of neurodevelopmental disorder, broadens knowledge of the clinical outcomes associated with MBOAT7-related disorder, and confirms the likely presence of a regionally prevalent founder variant (c.758_778del; p.Glu253_Ala259del) in Pakistan.
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Affiliation(s)
- Shazia Khan
- Department of Biological Sciences, International Islamic University Islamabad, H-10, Islamabad, 44000, Pakistan.,Medical Research, RILD Wellcome Wolfson Centre (Level 4), Royal Devon and Exeter NHS Foundation Trust, Exeter, Devon, EX2 5DW, UK.,Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Lettie E Rawlins
- Medical Research, RILD Wellcome Wolfson Centre (Level 4), Royal Devon and Exeter NHS Foundation Trust, Exeter, Devon, EX2 5DW, UK.,Peninsula Clinical Genetics Service, Royal Devon & Exeter Hospital (Heavitree), Gladstone Road, Exeter, EX1 2ED, UK
| | - Gaurav V Harlalka
- Medical Research, RILD Wellcome Wolfson Centre (Level 4), Royal Devon and Exeter NHS Foundation Trust, Exeter, Devon, EX2 5DW, UK.,Rajarshi Shahu College of Pharmacy, Malvihir Buldana, Maharashtra, Buldana, 443001, India
| | - Muhammad Umair
- Medical Genomics Research Department, King Abdullah International Medical Research Center (KAIMRC), King Saud bin Abdulaziz University for Health Sciences, Ministry of National Guard-Health Affairs (MNGHA), P.O. Box 3660, Riyadh, 11481, Kingdom of Saudi Arabia
| | - Asmat Ullah
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan.,Department of Molecular Biology, Shaheed Zulfiqar Ali Bhutto Medical University, Islamabad, Pakistan
| | - Shaheen Shahzad
- Department of Biological Sciences, International Islamic University Islamabad, H-10, Islamabad, 44000, Pakistan
| | - Muhammad Javed
- National Institute for Genomics & Advanced Biotechnology, NARC, Islamabad, 45500, Pakistan
| | - Emma L Baple
- Medical Research, RILD Wellcome Wolfson Centre (Level 4), Royal Devon and Exeter NHS Foundation Trust, Exeter, Devon, EX2 5DW, UK.,Peninsula Clinical Genetics Service, Royal Devon & Exeter Hospital (Heavitree), Gladstone Road, Exeter, EX1 2ED, UK
| | - Andrew H Crosby
- Medical Research, RILD Wellcome Wolfson Centre (Level 4), Royal Devon and Exeter NHS Foundation Trust, Exeter, Devon, EX2 5DW, UK
| | - Wasim Ahmad
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Asma Gul
- Department of Biological Sciences, International Islamic University Islamabad, H-10, Islamabad, 44000, Pakistan.
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7
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Mehmood S, Harlalka GV, Dad R, Chioza BA, Ullah MI, Ahmad A, Crosby AH, Baple EL, Hassan MJ. In Silico analysis of SIGMAR1 gene causing distal hereditary motor neuropathy in a Pakistani family. Gene Reports 2019. [DOI: 10.1016/j.genrep.2019.100445] [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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8
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Akbar A, Prince C, Payne C, Fasham J, Ahmad W, Baple EL, Crosby AH, Harlalka GV, Gul A. Novel nonsense variants in SLURP1 and DSG1 cause palmoplantar keratoderma in Pakistani families. BMC Med Genet 2019; 20:145. [PMID: 31443639 PMCID: PMC6708247 DOI: 10.1186/s12881-019-0872-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Accepted: 08/02/2019] [Indexed: 12/31/2022]
Abstract
Background Inherited palmoplantar keratodermas (PPKs) are clinically and genetically heterogeneous and phenotypically diverse group of genodermatoses characterized by hyperkeratosis of the palms and soles. More than 20 genes have been reported to be associated with PPKs including desmoglein 1 (DSG1) a key molecular component for epidermal adhesion and differentiation. Mal de Meleda (MDM) is a rare inherited autosomal recessive genodermatosis characterized by transgrediens PPK, associated with mutations in the secreted LY6/PLAUR domain containing 1 (SLURP1) gene. Methods This study describes clinical as well as genetic whole exome sequencing (WES) and di-deoxy sequencing investigations in two Pakistani families with a total of 12 individuals affected by PPK. Results WES identified a novel homozygous nonsense variant in SLURP1, and a novel heterozygous nonsense variant in DSG1, as likely causes of the conditions in each family. Conclusions This study expands knowledge regarding the molecular basis of PPK, providing important information to aid clinical management in families with PPK from Pakistan. Electronic supplementary material The online version of this article (10.1186/s12881-019-0872-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Abida Akbar
- Department of Biological Sciences, International Islamic University, H-10, Islamabad, 44000, Pakistan.,College of Medicine and Health, RILD Wellcome Wolfson Centre, University of Exeter, Royal Devon & Exeter NHS Foundation Trust, Barrack Road, Exeter, EX2 5DW, UK
| | - Claire Prince
- College of Medicine and Health, RILD Wellcome Wolfson Centre, University of Exeter, Royal Devon & Exeter NHS Foundation Trust, Barrack Road, Exeter, EX2 5DW, UK
| | - Chloe Payne
- College of Medicine and Health, RILD Wellcome Wolfson Centre, University of Exeter, Royal Devon & Exeter NHS Foundation Trust, Barrack Road, Exeter, EX2 5DW, UK
| | - James Fasham
- College of Medicine and Health, RILD Wellcome Wolfson Centre, University of Exeter, Royal Devon & Exeter NHS Foundation Trust, Barrack Road, Exeter, EX2 5DW, UK
| | - Wasim Ahmad
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-e-Azam University (QAU), Islamabad, Pakistan
| | - Emma L Baple
- College of Medicine and Health, RILD Wellcome Wolfson Centre, University of Exeter, Royal Devon & Exeter NHS Foundation Trust, Barrack Road, Exeter, EX2 5DW, UK
| | - Andrew H Crosby
- College of Medicine and Health, RILD Wellcome Wolfson Centre, University of Exeter, Royal Devon & Exeter NHS Foundation Trust, Barrack Road, Exeter, EX2 5DW, UK
| | - Gaurav V Harlalka
- College of Medicine and Health, RILD Wellcome Wolfson Centre, University of Exeter, Royal Devon & Exeter NHS Foundation Trust, Barrack Road, Exeter, EX2 5DW, UK.,Rajarshi Shahu College of Pharmacy, Malvihir Buldana, Maharashtra, Post code 443001, India
| | - Asma Gul
- Department of Biological Sciences, International Islamic University, H-10, Islamabad, 44000, Pakistan.
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9
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Shakil M, Harlalka GV, Ali S, Lin S, D'Atri I, Hussain S, Nasir A, Shahzad MA, Ullah MI, Self JE, Baple EL, Crosby AH, Mahmood S. Tyrosinase (TYR) gene sequencing and literature review reveals recurrent mutations and multiple population founder gene mutations as causative of oculocutaneous albinism (OCA) in Pakistani families. Eye (Lond) 2019; 33:1339-1346. [PMID: 30996339 PMCID: PMC7005860 DOI: 10.1038/s41433-019-0436-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2018] [Revised: 01/21/2019] [Accepted: 03/25/2019] [Indexed: 11/08/2022] Open
Abstract
PURPOSE To investigate eight previously unreported Pakistani families with genetically undefined OCA for mutations in TYR. METHODS Sanger sequencing of TYR has been performed in eight families with OCA phenotype. Mutation analysis was performed to establish the pathogenic role of novel mutation. Bioinformatics analysis was performed to predict the structural and functional impacts on protein due to the mutation. RESULTS In this study, we identified six likely pathogenic variants of TYR (c.272 G>A, c.308 G>A, c.346C>T, c.715 C>T, c.832 C>T and c.1255 G>A), including one novel variant (c.308 G>A; p.Cys103Tyr), segregating as appropriate in each family. Cys103 lies in the highly conserved region of the tyrosinase enzyme, and p.Cys103Tyr is predicted to disturb enzymatic function via alteration of the configurational orientation of TYR leading to a more rigid polypeptide structure. We have also reviewed the mutation spectrum of TYR in Pakistani ethnicity. Published data on OCA families proposed that ~40% have been associated with genetic variations in the TYR gene. The mutations reported in this study have now been described with varying frequencies in Pakistani families, including very rare/unique mutations. CONCLUSION A literature review of TYR gene mutations in Pakistani populations, combined with our genetic data, identified a number of gene mutations likely to represent regional ancestral founder mutations of relevance to Pakistani populations, in addition to sporadic and recurrent 'hotspot' mutations present repeatedly in other regions worldwide.
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Affiliation(s)
- Muhammad Shakil
- Department of Biochemistry, University of Health Sciences (UHS), Lahore, Pakistan
- RD&E (Wonford) NHS Foundation Trust, University of Exeter Medical School, Barrack Road, Exeter, Devon, EX2 5DW, UK
- Department of Biochemistry, Services Institute of Medical Sciences, Services Hospital, Lahore, Pakistan
| | - Gaurav V Harlalka
- RD&E (Wonford) NHS Foundation Trust, University of Exeter Medical School, Barrack Road, Exeter, Devon, EX2 5DW, UK
| | - Shamshad Ali
- Department of Ophthalmology, Services Institute of Medical Sciences, Services Hospital, Lahore, Pakistan
| | - Siying Lin
- RD&E (Wonford) NHS Foundation Trust, University of Exeter Medical School, Barrack Road, Exeter, Devon, EX2 5DW, UK
| | - Ilaria D'Atri
- RD&E (Wonford) NHS Foundation Trust, University of Exeter Medical School, Barrack Road, Exeter, Devon, EX2 5DW, UK
| | - Shabbir Hussain
- Department of Biochemistry, University of Health Sciences (UHS), Lahore, Pakistan
| | - Abdul Nasir
- Synthetic Protein Engineering Lab (SPEL), Department of Molecular Science and Technology, Ajou University, Suwon, 443-749, South Korea
| | - Muhammad Aiman Shahzad
- Department of Human Genetics and Molecular Biology, University of Health Sciences (UHS), Lahore, Pakistan
| | - Muhammad Ikram Ullah
- Department of Biochemistry, University of Health Sciences (UHS), Lahore, Pakistan
- Department of Clinical Laboratory Sciences, Jouf University, Sakaka-2014, Saudi Arabia
| | - Jay E Self
- Clinical and Experimental Sciences, University of Southampton, Southampton, UK
| | - Emma L Baple
- RD&E (Wonford) NHS Foundation Trust, University of Exeter Medical School, Barrack Road, Exeter, Devon, EX2 5DW, UK
| | - Andrew H Crosby
- RD&E (Wonford) NHS Foundation Trust, University of Exeter Medical School, Barrack Road, Exeter, Devon, EX2 5DW, UK
| | - Saqib Mahmood
- Department of Human Genetics and Molecular Biology, University of Health Sciences (UHS), Lahore, Pakistan.
- Institute of Biomedical and Allied Health Sciences, University of Health Sciences (UHS), Lahore, Pakistan.
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10
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Fasham J, Arno G, Lin S, Xu M, Carss KJ, Hull S, Lane A, Robson AG, Wenger O, Self JE, Harlalka GV, Salter CG, Schema L, Moss TJ, Cheetham ME, Moore AT, Raymond FL, Chen R, Baple EL, Webster AR, Crosby AH. Delineating the expanding phenotype associated with SCAPER gene mutation. Am J Med Genet A 2019; 179:1665-1671. [PMID: 31192531 PMCID: PMC6772143 DOI: 10.1002/ajmg.a.61202] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 05/01/2019] [Accepted: 05/05/2019] [Indexed: 11/19/2022]
Affiliation(s)
- James Fasham
- Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Royal Devon and Exeter NHS Foundation Trust, Exeter, United Kingdom.,Peninsula Clinical Genetics Service, Royal Devon and Exeter Hospital (Heavitree), Exeter, United Kingdom
| | - Gavin Arno
- UCL Institute of Ophthalmology, University College London, London, United Kingdom.,Moorfields Eye Hospital, London, United Kingdom
| | - Siying Lin
- Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Royal Devon and Exeter NHS Foundation Trust, Exeter, United Kingdom
| | - Mingchu Xu
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas.,Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas
| | - Keren J Carss
- Department of Haematology, NHS Blood and Transplant Centre, University of Cambridge, Cambridge, United Kingdom.,NIHR BioResource - Rare Diseases, Cambridge University Hospitals NHS Foundation Trust, Cambridge, United Kingdom
| | - Sarah Hull
- UCL Institute of Ophthalmology, University College London, London, United Kingdom.,Moorfields Eye Hospital, London, United Kingdom
| | - Amelia Lane
- UCL Institute of Ophthalmology, University College London, London, United Kingdom
| | - Anthony G Robson
- UCL Institute of Ophthalmology, University College London, London, United Kingdom.,Moorfields Eye Hospital, London, United Kingdom
| | - Olivia Wenger
- New Leaf Center, Clinic for Special Children, Mount Eaton, Ohio
| | - Jay E Self
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Gaurav V Harlalka
- Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Royal Devon and Exeter NHS Foundation Trust, Exeter, United Kingdom
| | - Claire G Salter
- Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Royal Devon and Exeter NHS Foundation Trust, Exeter, United Kingdom
| | - Lynn Schema
- Division of Genetics and Metabolism, University of Minnesota Medical Center - Fairview, Minneapolis, Minnesota
| | - Timothy J Moss
- Division of Genetics and Metabolism, Department of Pediatrics, University of Minnesota, Minneapolis, Minnesota
| | - Michael E Cheetham
- UCL Institute of Ophthalmology, University College London, London, United Kingdom
| | - Anthony T Moore
- UCL Institute of Ophthalmology, University College London, London, United Kingdom.,Moorfields Eye Hospital, London, United Kingdom.,Ophthalmology Department, UCSF School of Medicine, Koret Vision Centre, San Francisco, California
| | - F Lucy Raymond
- NIHR BioResource - Rare Diseases, Cambridge University Hospitals NHS Foundation Trust, Cambridge, United Kingdom.,Department of Medical Genetics, Cambridge Institute for Medical Research, University of Cambridge, Cambridge, United Kingdom
| | - Rui Chen
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas.,Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas
| | - Emma L Baple
- Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Royal Devon and Exeter NHS Foundation Trust, Exeter, United Kingdom.,Peninsula Clinical Genetics Service, Royal Devon and Exeter Hospital (Heavitree), Exeter, United Kingdom
| | - Andrew R Webster
- UCL Institute of Ophthalmology, University College London, London, United Kingdom.,Moorfields Eye Hospital, London, United Kingdom
| | - Andrew H Crosby
- Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Royal Devon and Exeter NHS Foundation Trust, Exeter, United Kingdom
| | -
- NIHR BioResource - Rare Diseases, Cambridge University Hospitals NHS Foundation Trust, Cambridge, United Kingdom
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11
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Khan S, Lin S, Harlalka GV, Ullah A, Shah K, Khalid S, Mehmood S, Hassan MJ, Ahmad W, Self JE, Crosby AH, Baple EL, Gul A. BBS5 and INPP5E mutations associated with ciliopathy disorders in families from Pakistan. Ann Hum Genet 2019; 83:477-482. [PMID: 31173343 DOI: 10.1111/ahg.12336] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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: 09/02/2018] [Revised: 04/17/2019] [Accepted: 05/18/2019] [Indexed: 11/28/2022]
Abstract
Ciliopathies are a clinically and genetically heterogeneous group of disorders often exhibiting phenotypic overlap and caused by abnormalities in the structure or function of cellular cilia. As such, a precise molecular diagnosis is important for guiding clinical management and genetic counseling. In the present study, two Pakistani families comprising individuals with overlapping clinical features suggestive of a ciliopathy syndrome, including intellectual disability, obesity, congenital retinal dystrophy, and hypogonadism (in males), were investigated clinically and genetically. Whole-exome sequencing identified the likely causes of disease as a novel homozygous frameshift mutation (NM_152384.2: c.196delA; p.(Arg66Glufs*12); family 1) in BBS5, and a nonsense mutation (NM_019892.5:c.1879C>T; p.Gln627*; family 2) in INPP5E, previously reported in an extended Pakistani family with MORM syndrome. Our findings expand the molecular spectrum associated with BBS5 mutations in Pakistan and provide further supportive evidence that the INPP5E mutation is a common cause of ciliopathy in Northern Pakistan, likely representing a regional founder mutation. This study also highlights the value of genomic studies in Pakistan for families affected by rare heterogeneous developmental disorders and where clinical phenotyping may be limited by geographical and financial constraints. The identification of the spectrum and frequency of disease-causing variants within this setting enables the development of population-specific genetic testing strategies targeting variants common to the local population and improving health care outcomes.
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Affiliation(s)
- Shazia Khan
- Department of Biological Sciences, International Islamic University Islamabad, Islamabad, Pakistan.,RILD Wellcome Wolfson Centre, Royal Devon and Exeter Hospital, Exeter, UK
| | - Siying Lin
- RILD Wellcome Wolfson Centre, Royal Devon and Exeter Hospital, Exeter, UK
| | - Gaurav V Harlalka
- RILD Wellcome Wolfson Centre, Royal Devon and Exeter Hospital, Exeter, UK
| | - Asmat Ullah
- Department of Biochemistry, Quaid-i-Azam University, Islamabad, Pakistan.,Department of Molecualr Biology, Shaheed Zulfiqar Ali Bhutto Medical University, PIMS, Islamabad, Pakistan
| | - Khadim Shah
- Department of Biotechnology, COMSATS University Islamabad, Abbotabad Campus, Pakistan
| | - Sumbul Khalid
- Department of Biological Sciences, International Islamic University Islamabad, Islamabad, Pakistan
| | - Sarmad Mehmood
- Atta ur Rahman School of Applied Biosciences, National University of Sciences & Technology, Islamabad, Pakistan
| | - Muhammad Jawad Hassan
- Atta ur Rahman School of Applied Biosciences, National University of Sciences & Technology, Islamabad, Pakistan
| | - Wasim Ahmad
- Department of Biochemistry, Quaid-i-Azam University, Islamabad, Pakistan
| | - Jay E Self
- Clinical and Experimental Sciences, University of Southampton, Southampton, UK
| | - Andrew H Crosby
- RILD Wellcome Wolfson Centre, Royal Devon and Exeter Hospital, Exeter, UK
| | - Emma L Baple
- RILD Wellcome Wolfson Centre, Royal Devon and Exeter Hospital, Exeter, UK.,Peninsula Clinical Genetics Service, Royal Devon & Exeter Hospital, Exeter, UK
| | - Asma Gul
- Department of Biological Sciences, International Islamic University Islamabad, Islamabad, Pakistan
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12
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Alakbarzade V, Iype T, Chioza BA, Singh R, Harlalka GV, Hardy H, Sreekantan-Nair A, Proukakis C, Peall K, Clark LN, Caswell R, Lango Allen H, Wakeling M, Chilton JK, Baple EL, Louis ED, Warner TT, Crosby AH. Copy number variation of LINGO1 in familial dystonic tremor. Neurol Genet 2019; 5:e307. [PMID: 30842974 PMCID: PMC6384021 DOI: 10.1212/nxg.0000000000000307] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Accepted: 11/14/2018] [Indexed: 01/18/2023]
Abstract
Objective To elucidate the genetic cause of a large 5 generation South Indian family with multiple individuals with predominantly an upper limb postural tremor and posturing in keeping with another form of tremor, namely, dystonic tremor. Methods Whole-genome single nucleotide polymorphism (SNP) microarray analysis was undertaken to look for copy number variants in the affected individuals. Results Whole-genome SNP microarray studies identified a tandem duplicated genomic segment of chromosome 15q24 present in all affected family members. Whole-genome sequencing demonstrated that it comprised a ∼550-kb tandem duplication encompassing the entire LINGO1 gene. Conclusions The identification of a genomic duplication as the likely molecular cause of this condition, resulting in an additional LINGO1 gene copy in affected cases, adds further support for a causal role of this gene in tremor disorders and implicates increased expression levels of LINGO1 as a potential pathogenic mechanism.
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Affiliation(s)
- Vafa Alakbarzade
- Medical Research (Level 4) (V.A., B.A.C., G.V.H., H.H., A.S.-N., J.K.C., E.L.B., A.H.C.), University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, United Kingdom; Reta Lila Weston Institute of Neurological Studies (V.A., T.T.W.), UCL Institute of Neurology, London, United Kingdom; Department of Neurology (T.I.), Government Medical College, Thiruvananthapuram, Kerala, India; Department of Anatomy and Microbiology (R.S.), Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India; Clinical Neuroscience (C.P.), Royal Free Campus, UCL Institute of Neurology, London, United Kingdom; Institute of Psychological Medicine and Clinical Neurosciences (K.P.), Cardiff University, Cardiff, United Kingdom; Taub Institute for Research on Alzheimer's Disease and the Aging Brain (L.N.C.), Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY; Institute of Biomedical and Clinical Science (R.C., H.L.A., M.W.), University of Exeter Medical School, United Kingdom; and Departments of Neurology and Chronic Disease Epidemiology and Center for Neuroepidemiology and Clinical Neurological Research (E.D.L.), Yale School of Medicine and Yale School of Public Health, Yale University, New Haven, CT
| | - Thomas Iype
- Medical Research (Level 4) (V.A., B.A.C., G.V.H., H.H., A.S.-N., J.K.C., E.L.B., A.H.C.), University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, United Kingdom; Reta Lila Weston Institute of Neurological Studies (V.A., T.T.W.), UCL Institute of Neurology, London, United Kingdom; Department of Neurology (T.I.), Government Medical College, Thiruvananthapuram, Kerala, India; Department of Anatomy and Microbiology (R.S.), Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India; Clinical Neuroscience (C.P.), Royal Free Campus, UCL Institute of Neurology, London, United Kingdom; Institute of Psychological Medicine and Clinical Neurosciences (K.P.), Cardiff University, Cardiff, United Kingdom; Taub Institute for Research on Alzheimer's Disease and the Aging Brain (L.N.C.), Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY; Institute of Biomedical and Clinical Science (R.C., H.L.A., M.W.), University of Exeter Medical School, United Kingdom; and Departments of Neurology and Chronic Disease Epidemiology and Center for Neuroepidemiology and Clinical Neurological Research (E.D.L.), Yale School of Medicine and Yale School of Public Health, Yale University, New Haven, CT
| | - Barry A Chioza
- Medical Research (Level 4) (V.A., B.A.C., G.V.H., H.H., A.S.-N., J.K.C., E.L.B., A.H.C.), University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, United Kingdom; Reta Lila Weston Institute of Neurological Studies (V.A., T.T.W.), UCL Institute of Neurology, London, United Kingdom; Department of Neurology (T.I.), Government Medical College, Thiruvananthapuram, Kerala, India; Department of Anatomy and Microbiology (R.S.), Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India; Clinical Neuroscience (C.P.), Royal Free Campus, UCL Institute of Neurology, London, United Kingdom; Institute of Psychological Medicine and Clinical Neurosciences (K.P.), Cardiff University, Cardiff, United Kingdom; Taub Institute for Research on Alzheimer's Disease and the Aging Brain (L.N.C.), Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY; Institute of Biomedical and Clinical Science (R.C., H.L.A., M.W.), University of Exeter Medical School, United Kingdom; and Departments of Neurology and Chronic Disease Epidemiology and Center for Neuroepidemiology and Clinical Neurological Research (E.D.L.), Yale School of Medicine and Yale School of Public Health, Yale University, New Haven, CT
| | - Royana Singh
- Medical Research (Level 4) (V.A., B.A.C., G.V.H., H.H., A.S.-N., J.K.C., E.L.B., A.H.C.), University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, United Kingdom; Reta Lila Weston Institute of Neurological Studies (V.A., T.T.W.), UCL Institute of Neurology, London, United Kingdom; Department of Neurology (T.I.), Government Medical College, Thiruvananthapuram, Kerala, India; Department of Anatomy and Microbiology (R.S.), Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India; Clinical Neuroscience (C.P.), Royal Free Campus, UCL Institute of Neurology, London, United Kingdom; Institute of Psychological Medicine and Clinical Neurosciences (K.P.), Cardiff University, Cardiff, United Kingdom; Taub Institute for Research on Alzheimer's Disease and the Aging Brain (L.N.C.), Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY; Institute of Biomedical and Clinical Science (R.C., H.L.A., M.W.), University of Exeter Medical School, United Kingdom; and Departments of Neurology and Chronic Disease Epidemiology and Center for Neuroepidemiology and Clinical Neurological Research (E.D.L.), Yale School of Medicine and Yale School of Public Health, Yale University, New Haven, CT
| | - Gaurav V Harlalka
- Medical Research (Level 4) (V.A., B.A.C., G.V.H., H.H., A.S.-N., J.K.C., E.L.B., A.H.C.), University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, United Kingdom; Reta Lila Weston Institute of Neurological Studies (V.A., T.T.W.), UCL Institute of Neurology, London, United Kingdom; Department of Neurology (T.I.), Government Medical College, Thiruvananthapuram, Kerala, India; Department of Anatomy and Microbiology (R.S.), Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India; Clinical Neuroscience (C.P.), Royal Free Campus, UCL Institute of Neurology, London, United Kingdom; Institute of Psychological Medicine and Clinical Neurosciences (K.P.), Cardiff University, Cardiff, United Kingdom; Taub Institute for Research on Alzheimer's Disease and the Aging Brain (L.N.C.), Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY; Institute of Biomedical and Clinical Science (R.C., H.L.A., M.W.), University of Exeter Medical School, United Kingdom; and Departments of Neurology and Chronic Disease Epidemiology and Center for Neuroepidemiology and Clinical Neurological Research (E.D.L.), Yale School of Medicine and Yale School of Public Health, Yale University, New Haven, CT
| | - Holly Hardy
- Medical Research (Level 4) (V.A., B.A.C., G.V.H., H.H., A.S.-N., J.K.C., E.L.B., A.H.C.), University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, United Kingdom; Reta Lila Weston Institute of Neurological Studies (V.A., T.T.W.), UCL Institute of Neurology, London, United Kingdom; Department of Neurology (T.I.), Government Medical College, Thiruvananthapuram, Kerala, India; Department of Anatomy and Microbiology (R.S.), Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India; Clinical Neuroscience (C.P.), Royal Free Campus, UCL Institute of Neurology, London, United Kingdom; Institute of Psychological Medicine and Clinical Neurosciences (K.P.), Cardiff University, Cardiff, United Kingdom; Taub Institute for Research on Alzheimer's Disease and the Aging Brain (L.N.C.), Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY; Institute of Biomedical and Clinical Science (R.C., H.L.A., M.W.), University of Exeter Medical School, United Kingdom; and Departments of Neurology and Chronic Disease Epidemiology and Center for Neuroepidemiology and Clinical Neurological Research (E.D.L.), Yale School of Medicine and Yale School of Public Health, Yale University, New Haven, CT
| | - Ajith Sreekantan-Nair
- Medical Research (Level 4) (V.A., B.A.C., G.V.H., H.H., A.S.-N., J.K.C., E.L.B., A.H.C.), University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, United Kingdom; Reta Lila Weston Institute of Neurological Studies (V.A., T.T.W.), UCL Institute of Neurology, London, United Kingdom; Department of Neurology (T.I.), Government Medical College, Thiruvananthapuram, Kerala, India; Department of Anatomy and Microbiology (R.S.), Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India; Clinical Neuroscience (C.P.), Royal Free Campus, UCL Institute of Neurology, London, United Kingdom; Institute of Psychological Medicine and Clinical Neurosciences (K.P.), Cardiff University, Cardiff, United Kingdom; Taub Institute for Research on Alzheimer's Disease and the Aging Brain (L.N.C.), Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY; Institute of Biomedical and Clinical Science (R.C., H.L.A., M.W.), University of Exeter Medical School, United Kingdom; and Departments of Neurology and Chronic Disease Epidemiology and Center for Neuroepidemiology and Clinical Neurological Research (E.D.L.), Yale School of Medicine and Yale School of Public Health, Yale University, New Haven, CT
| | - Christos Proukakis
- Medical Research (Level 4) (V.A., B.A.C., G.V.H., H.H., A.S.-N., J.K.C., E.L.B., A.H.C.), University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, United Kingdom; Reta Lila Weston Institute of Neurological Studies (V.A., T.T.W.), UCL Institute of Neurology, London, United Kingdom; Department of Neurology (T.I.), Government Medical College, Thiruvananthapuram, Kerala, India; Department of Anatomy and Microbiology (R.S.), Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India; Clinical Neuroscience (C.P.), Royal Free Campus, UCL Institute of Neurology, London, United Kingdom; Institute of Psychological Medicine and Clinical Neurosciences (K.P.), Cardiff University, Cardiff, United Kingdom; Taub Institute for Research on Alzheimer's Disease and the Aging Brain (L.N.C.), Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY; Institute of Biomedical and Clinical Science (R.C., H.L.A., M.W.), University of Exeter Medical School, United Kingdom; and Departments of Neurology and Chronic Disease Epidemiology and Center for Neuroepidemiology and Clinical Neurological Research (E.D.L.), Yale School of Medicine and Yale School of Public Health, Yale University, New Haven, CT
| | - Kathryn Peall
- Medical Research (Level 4) (V.A., B.A.C., G.V.H., H.H., A.S.-N., J.K.C., E.L.B., A.H.C.), University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, United Kingdom; Reta Lila Weston Institute of Neurological Studies (V.A., T.T.W.), UCL Institute of Neurology, London, United Kingdom; Department of Neurology (T.I.), Government Medical College, Thiruvananthapuram, Kerala, India; Department of Anatomy and Microbiology (R.S.), Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India; Clinical Neuroscience (C.P.), Royal Free Campus, UCL Institute of Neurology, London, United Kingdom; Institute of Psychological Medicine and Clinical Neurosciences (K.P.), Cardiff University, Cardiff, United Kingdom; Taub Institute for Research on Alzheimer's Disease and the Aging Brain (L.N.C.), Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY; Institute of Biomedical and Clinical Science (R.C., H.L.A., M.W.), University of Exeter Medical School, United Kingdom; and Departments of Neurology and Chronic Disease Epidemiology and Center for Neuroepidemiology and Clinical Neurological Research (E.D.L.), Yale School of Medicine and Yale School of Public Health, Yale University, New Haven, CT
| | - Lorraine N Clark
- Medical Research (Level 4) (V.A., B.A.C., G.V.H., H.H., A.S.-N., J.K.C., E.L.B., A.H.C.), University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, United Kingdom; Reta Lila Weston Institute of Neurological Studies (V.A., T.T.W.), UCL Institute of Neurology, London, United Kingdom; Department of Neurology (T.I.), Government Medical College, Thiruvananthapuram, Kerala, India; Department of Anatomy and Microbiology (R.S.), Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India; Clinical Neuroscience (C.P.), Royal Free Campus, UCL Institute of Neurology, London, United Kingdom; Institute of Psychological Medicine and Clinical Neurosciences (K.P.), Cardiff University, Cardiff, United Kingdom; Taub Institute for Research on Alzheimer's Disease and the Aging Brain (L.N.C.), Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY; Institute of Biomedical and Clinical Science (R.C., H.L.A., M.W.), University of Exeter Medical School, United Kingdom; and Departments of Neurology and Chronic Disease Epidemiology and Center for Neuroepidemiology and Clinical Neurological Research (E.D.L.), Yale School of Medicine and Yale School of Public Health, Yale University, New Haven, CT
| | - Richard Caswell
- Medical Research (Level 4) (V.A., B.A.C., G.V.H., H.H., A.S.-N., J.K.C., E.L.B., A.H.C.), University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, United Kingdom; Reta Lila Weston Institute of Neurological Studies (V.A., T.T.W.), UCL Institute of Neurology, London, United Kingdom; Department of Neurology (T.I.), Government Medical College, Thiruvananthapuram, Kerala, India; Department of Anatomy and Microbiology (R.S.), Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India; Clinical Neuroscience (C.P.), Royal Free Campus, UCL Institute of Neurology, London, United Kingdom; Institute of Psychological Medicine and Clinical Neurosciences (K.P.), Cardiff University, Cardiff, United Kingdom; Taub Institute for Research on Alzheimer's Disease and the Aging Brain (L.N.C.), Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY; Institute of Biomedical and Clinical Science (R.C., H.L.A., M.W.), University of Exeter Medical School, United Kingdom; and Departments of Neurology and Chronic Disease Epidemiology and Center for Neuroepidemiology and Clinical Neurological Research (E.D.L.), Yale School of Medicine and Yale School of Public Health, Yale University, New Haven, CT
| | - Hana Lango Allen
- Medical Research (Level 4) (V.A., B.A.C., G.V.H., H.H., A.S.-N., J.K.C., E.L.B., A.H.C.), University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, United Kingdom; Reta Lila Weston Institute of Neurological Studies (V.A., T.T.W.), UCL Institute of Neurology, London, United Kingdom; Department of Neurology (T.I.), Government Medical College, Thiruvananthapuram, Kerala, India; Department of Anatomy and Microbiology (R.S.), Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India; Clinical Neuroscience (C.P.), Royal Free Campus, UCL Institute of Neurology, London, United Kingdom; Institute of Psychological Medicine and Clinical Neurosciences (K.P.), Cardiff University, Cardiff, United Kingdom; Taub Institute for Research on Alzheimer's Disease and the Aging Brain (L.N.C.), Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY; Institute of Biomedical and Clinical Science (R.C., H.L.A., M.W.), University of Exeter Medical School, United Kingdom; and Departments of Neurology and Chronic Disease Epidemiology and Center for Neuroepidemiology and Clinical Neurological Research (E.D.L.), Yale School of Medicine and Yale School of Public Health, Yale University, New Haven, CT
| | - Matthew Wakeling
- Medical Research (Level 4) (V.A., B.A.C., G.V.H., H.H., A.S.-N., J.K.C., E.L.B., A.H.C.), University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, United Kingdom; Reta Lila Weston Institute of Neurological Studies (V.A., T.T.W.), UCL Institute of Neurology, London, United Kingdom; Department of Neurology (T.I.), Government Medical College, Thiruvananthapuram, Kerala, India; Department of Anatomy and Microbiology (R.S.), Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India; Clinical Neuroscience (C.P.), Royal Free Campus, UCL Institute of Neurology, London, United Kingdom; Institute of Psychological Medicine and Clinical Neurosciences (K.P.), Cardiff University, Cardiff, United Kingdom; Taub Institute for Research on Alzheimer's Disease and the Aging Brain (L.N.C.), Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY; Institute of Biomedical and Clinical Science (R.C., H.L.A., M.W.), University of Exeter Medical School, United Kingdom; and Departments of Neurology and Chronic Disease Epidemiology and Center for Neuroepidemiology and Clinical Neurological Research (E.D.L.), Yale School of Medicine and Yale School of Public Health, Yale University, New Haven, CT
| | - John K Chilton
- Medical Research (Level 4) (V.A., B.A.C., G.V.H., H.H., A.S.-N., J.K.C., E.L.B., A.H.C.), University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, United Kingdom; Reta Lila Weston Institute of Neurological Studies (V.A., T.T.W.), UCL Institute of Neurology, London, United Kingdom; Department of Neurology (T.I.), Government Medical College, Thiruvananthapuram, Kerala, India; Department of Anatomy and Microbiology (R.S.), Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India; Clinical Neuroscience (C.P.), Royal Free Campus, UCL Institute of Neurology, London, United Kingdom; Institute of Psychological Medicine and Clinical Neurosciences (K.P.), Cardiff University, Cardiff, United Kingdom; Taub Institute for Research on Alzheimer's Disease and the Aging Brain (L.N.C.), Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY; Institute of Biomedical and Clinical Science (R.C., H.L.A., M.W.), University of Exeter Medical School, United Kingdom; and Departments of Neurology and Chronic Disease Epidemiology and Center for Neuroepidemiology and Clinical Neurological Research (E.D.L.), Yale School of Medicine and Yale School of Public Health, Yale University, New Haven, CT
| | - Emma L Baple
- Medical Research (Level 4) (V.A., B.A.C., G.V.H., H.H., A.S.-N., J.K.C., E.L.B., A.H.C.), University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, United Kingdom; Reta Lila Weston Institute of Neurological Studies (V.A., T.T.W.), UCL Institute of Neurology, London, United Kingdom; Department of Neurology (T.I.), Government Medical College, Thiruvananthapuram, Kerala, India; Department of Anatomy and Microbiology (R.S.), Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India; Clinical Neuroscience (C.P.), Royal Free Campus, UCL Institute of Neurology, London, United Kingdom; Institute of Psychological Medicine and Clinical Neurosciences (K.P.), Cardiff University, Cardiff, United Kingdom; Taub Institute for Research on Alzheimer's Disease and the Aging Brain (L.N.C.), Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY; Institute of Biomedical and Clinical Science (R.C., H.L.A., M.W.), University of Exeter Medical School, United Kingdom; and Departments of Neurology and Chronic Disease Epidemiology and Center for Neuroepidemiology and Clinical Neurological Research (E.D.L.), Yale School of Medicine and Yale School of Public Health, Yale University, New Haven, CT
| | - Elan D Louis
- Medical Research (Level 4) (V.A., B.A.C., G.V.H., H.H., A.S.-N., J.K.C., E.L.B., A.H.C.), University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, United Kingdom; Reta Lila Weston Institute of Neurological Studies (V.A., T.T.W.), UCL Institute of Neurology, London, United Kingdom; Department of Neurology (T.I.), Government Medical College, Thiruvananthapuram, Kerala, India; Department of Anatomy and Microbiology (R.S.), Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India; Clinical Neuroscience (C.P.), Royal Free Campus, UCL Institute of Neurology, London, United Kingdom; Institute of Psychological Medicine and Clinical Neurosciences (K.P.), Cardiff University, Cardiff, United Kingdom; Taub Institute for Research on Alzheimer's Disease and the Aging Brain (L.N.C.), Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY; Institute of Biomedical and Clinical Science (R.C., H.L.A., M.W.), University of Exeter Medical School, United Kingdom; and Departments of Neurology and Chronic Disease Epidemiology and Center for Neuroepidemiology and Clinical Neurological Research (E.D.L.), Yale School of Medicine and Yale School of Public Health, Yale University, New Haven, CT
| | - Thomas T Warner
- Medical Research (Level 4) (V.A., B.A.C., G.V.H., H.H., A.S.-N., J.K.C., E.L.B., A.H.C.), University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, United Kingdom; Reta Lila Weston Institute of Neurological Studies (V.A., T.T.W.), UCL Institute of Neurology, London, United Kingdom; Department of Neurology (T.I.), Government Medical College, Thiruvananthapuram, Kerala, India; Department of Anatomy and Microbiology (R.S.), Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India; Clinical Neuroscience (C.P.), Royal Free Campus, UCL Institute of Neurology, London, United Kingdom; Institute of Psychological Medicine and Clinical Neurosciences (K.P.), Cardiff University, Cardiff, United Kingdom; Taub Institute for Research on Alzheimer's Disease and the Aging Brain (L.N.C.), Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY; Institute of Biomedical and Clinical Science (R.C., H.L.A., M.W.), University of Exeter Medical School, United Kingdom; and Departments of Neurology and Chronic Disease Epidemiology and Center for Neuroepidemiology and Clinical Neurological Research (E.D.L.), Yale School of Medicine and Yale School of Public Health, Yale University, New Haven, CT
| | - Andrew H Crosby
- Medical Research (Level 4) (V.A., B.A.C., G.V.H., H.H., A.S.-N., J.K.C., E.L.B., A.H.C.), University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, United Kingdom; Reta Lila Weston Institute of Neurological Studies (V.A., T.T.W.), UCL Institute of Neurology, London, United Kingdom; Department of Neurology (T.I.), Government Medical College, Thiruvananthapuram, Kerala, India; Department of Anatomy and Microbiology (R.S.), Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India; Clinical Neuroscience (C.P.), Royal Free Campus, UCL Institute of Neurology, London, United Kingdom; Institute of Psychological Medicine and Clinical Neurosciences (K.P.), Cardiff University, Cardiff, United Kingdom; Taub Institute for Research on Alzheimer's Disease and the Aging Brain (L.N.C.), Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY; Institute of Biomedical and Clinical Science (R.C., H.L.A., M.W.), University of Exeter Medical School, United Kingdom; and Departments of Neurology and Chronic Disease Epidemiology and Center for Neuroepidemiology and Clinical Neurological Research (E.D.L.), Yale School of Medicine and Yale School of Public Health, Yale University, New Haven, CT
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13
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Lin S, Harlalka GV, Hameed A, Reham HM, Yasin M, Muhammad N, Khan S, Baple EL, Crosby AH, Saleha S. Novel mutations in ALDH1A3 associated with autosomal recessive anophthalmia/microphthalmia, and review of the literature. BMC Med Genet 2018; 19:160. [PMID: 30200890 PMCID: PMC6131798 DOI: 10.1186/s12881-018-0678-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Accepted: 09/02/2018] [Indexed: 11/10/2022]
Abstract
BACKGROUND Autosomal recessive anophthalmia and microphthalmia are rare developmental eye defects occurring during early fetal development. Syndromic and non-syndromic forms of anophthalmia and microphthalmia demonstrate extensive genetic and allelic heterogeneity. To date, disease mutations have been identified in 29 causative genes associated with anophthalmia and microphthalmia, with autosomal dominant, autosomal recessive and X-linked inheritance patterns described. Biallelic ALDH1A3 gene variants are the leading genetic causes of autosomal recessive anophthalmia and microphthalmia in countries with frequent parental consanguinity. METHODS This study describes genetic investigations in two consanguineous Pakistani families with a total of seven affected individuals with bilateral non-syndromic clinical anophthalmia. RESULTS Using whole exome and Sanger sequencing, we identified two novel homozygous ALDH1A3 sequence variants as likely responsible for the condition in each family; missense mutation [NM_000693.3:c.1240G > C, p.Gly414Arg; Chr15:101447332G > C (GRCh37)] in exon 11 (family 1), and, a frameshift mutation [NM_000693.3:c.172dup, p.Glu58Glyfs*5; Chr15:101425544dup (GRCh37)] in exon 2 predicted to result in protein truncation (family 2). CONCLUSIONS This study expands the molecular spectrum of pathogenic ALDH1A3 variants associated with anophthalmia and microphthalmia, and provides further insight of the key role of the ALDH1A3 in human eye development.
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Affiliation(s)
- Siying Lin
- Medical Research, RILD Wellcome Wolfson Centre (Level 4), Royal Devon and Exeter NHS Foundation Trust, Exeter, Devon, EX2 5DW, UK
| | - Gaurav V Harlalka
- Medical Research, RILD Wellcome Wolfson Centre (Level 4), Royal Devon and Exeter NHS Foundation Trust, Exeter, Devon, EX2 5DW, UK
| | - Abdul Hameed
- Institute of Biomedical and Genetic Engineering (IBGE), Islamabad, 44000, Pakistan
| | - Hadia Moattar Reham
- Department of Biotechnology and Genetic Engineering, Kohat University of Science and Technology (KUST), Kohat, Khyber Pakhtunkhwa, 26000, Pakistan
| | - Muhammad Yasin
- Department of Biotechnology and Genetic Engineering, Kohat University of Science and Technology (KUST), Kohat, Khyber Pakhtunkhwa, 26000, Pakistan
| | - Noor Muhammad
- Department of Biotechnology and Genetic Engineering, Kohat University of Science and Technology (KUST), Kohat, Khyber Pakhtunkhwa, 26000, Pakistan
| | - Saadullah Khan
- Department of Biotechnology and Genetic Engineering, Kohat University of Science and Technology (KUST), Kohat, Khyber Pakhtunkhwa, 26000, Pakistan
| | - Emma L Baple
- Medical Research, RILD Wellcome Wolfson Centre (Level 4), Royal Devon and Exeter NHS Foundation Trust, Exeter, Devon, EX2 5DW, UK
| | - Andrew H Crosby
- Medical Research, RILD Wellcome Wolfson Centre (Level 4), Royal Devon and Exeter NHS Foundation Trust, Exeter, Devon, EX2 5DW, UK
| | - Shamim Saleha
- Department of Biotechnology and Genetic Engineering, Kohat University of Science and Technology (KUST), Kohat, Khyber Pakhtunkhwa, 26000, Pakistan.
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14
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Arshad MW, Harlalka GV, Lin S, D'Atri I, Mehmood S, Shakil M, Hassan MJ, Chioza BA, Self JE, Ennis S, O'Gorman L, Norman C, Aman T, Ali SS, Kaul H, Baple EL, Crosby AH, Ullah MI, Shabbir MI. Mutations in TYR and OCA2 associated with oculocutaneous albinism in Pakistani families. Meta Gene 2018. [DOI: 10.1016/j.mgene.2018.03.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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15
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Li L, Jiao X, D’Atri I, Ono F, Nelson R, Chan CC, Nakaya N, Ma Z, Ma Y, Cai X, Zhang L, Lin S, Hameed A, Chioza BA, Hardy H, Arno G, Hull S, Khan MI, Fasham J, Harlalka GV, Michaelides M, Moore AT, Coban Akdemir ZH, Jhangiani S, Lupski JR, Cremers FPM, Qamar R, Salman A, Chilton J, Self J, Ayyagari R, Kabir F, Naeem MA, Ali M, Akram J, Sieving PA, Riazuddin S, Baple EL, Riazuddin SA, Crosby AH, Hejtmancik JF. Mutation in the intracellular chloride channel CLCC1 associated with autosomal recessive retinitis pigmentosa. PLoS Genet 2018; 14:e1007504. [PMID: 30157172 PMCID: PMC6133373 DOI: 10.1371/journal.pgen.1007504] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 09/11/2018] [Accepted: 06/21/2018] [Indexed: 02/07/2023] Open
Abstract
We identified a homozygous missense alteration (c.75C>A, p.D25E) in CLCC1, encoding a presumptive intracellular chloride channel highly expressed in the retina, associated with autosomal recessive retinitis pigmentosa (arRP) in eight consanguineous families of Pakistani descent. The p.D25E alteration decreased CLCC1 channel function accompanied by accumulation of mutant protein in granules within the ER lumen, while siRNA knockdown of CLCC1 mRNA induced apoptosis in cultured ARPE-19 cells. TALEN KO in zebrafish was lethal 11 days post fertilization. The depressed electroretinogram (ERG) cone response and cone spectral sensitivity of 5 dpf KO zebrafish and reduced eye size, retinal thickness, and expression of rod and cone opsins could be rescued by injection of wild type CLCC1 mRNA. Clcc1+/- KO mice showed decreased ERGs and photoreceptor number. Together these results strongly suggest that intracellular chloride transport by CLCC1 is a critical process in maintaining retinal integrity, and CLCC1 is crucial for survival and function of retinal cells.
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Affiliation(s)
- Lin Li
- Department of Ophthalmology, Shanghai Ninth People’s Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, P.R. China
- Ophthalmic Genetics and Visual Function Branch, National Eye Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Xiaodong Jiao
- Ophthalmic Genetics and Visual Function Branch, National Eye Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Ilaria D’Atri
- RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, Exeter, United Kingdom
| | - Fumihito Ono
- Section on Model Synaptic Systems, Laboratory of Molecular Physiology, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, Maryland, United States of America
- Department of Physiology, Osaka Medical College, Takatsuki, Japan
| | - Ralph Nelson
- Unit on Neural Circuits, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Chi-Chao Chan
- Laboratory of Immunology, National Eye Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Naoki Nakaya
- Section of Molecular Mechanisms of Glaucoma, Laboratory of Molecular and Developmental Biology, National Eye Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Zhiwei Ma
- Ophthalmic Genetics and Visual Function Branch, National Eye Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Yan Ma
- Ophthalmic Genetics and Visual Function Branch, National Eye Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Xiaoying Cai
- School of Life Sciences, University of Science and Technology of China, Hefei, Anhui, P.R. China
| | - Longhua Zhang
- School of Life Sciences, University of Science and Technology of China, Hefei, Anhui, P.R. China
| | - Siying Lin
- RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, Exeter, United Kingdom
| | - Abdul Hameed
- RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, Exeter, United Kingdom
- Institute of Biomedical and Genetic Engineering (IBGE), Islamabad, Pakistan
| | - Barry A. Chioza
- RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, Exeter, United Kingdom
| | - Holly Hardy
- RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, Exeter, United Kingdom
| | - Gavin Arno
- Institute of Ophthalmology, University College London, London, United Kingdom
- Department of Biosciences, Moorfields Eye Hospital, London, United Kingdom
| | - Sarah Hull
- Institute of Ophthalmology, University College London, London, United Kingdom
- Department of Biosciences, Moorfields Eye Hospital, London, United Kingdom
| | - Muhammad Imran Khan
- Faculty of Science, COMSATS Institute of Information Technology, Islamabad, Pakistan
| | - James Fasham
- RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, Exeter, United Kingdom
- Department of Clinical Genetics, Royal Devon & Exeter NHS Foundation Trust, Exeter, United Kingdom
| | - Gaurav V. Harlalka
- RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, Exeter, United Kingdom
| | - Michel Michaelides
- Institute of Ophthalmology, University College London, London, United Kingdom
- Department of Biosciences, Moorfields Eye Hospital, London, United Kingdom
| | - Anthony T. Moore
- Institute of Ophthalmology, University College London, London, United Kingdom
- Department of Biosciences, Moorfields Eye Hospital, London, United Kingdom
- Ophthalmology Department, UCSF School of Medicine, San Francisco, California, United States of America
| | - Zeynep Hande Coban Akdemir
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, United States of America
| | - Shalini Jhangiani
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas, United States of America
| | - James R. Lupski
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, United States of America
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas, United States of America
- Department of Pediatrics, Baylor College of Medicine, Houston, Texas, United States of America
- Texas Children’s Hospital, Houston, Texas, United States of America
| | - Frans P. M. Cremers
- Department of Human Genetics, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Raheel Qamar
- Faculty of Science, COMSATS Institute of Information Technology, Islamabad, Pakistan
| | - Ahmed Salman
- Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - John Chilton
- RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, Exeter, United Kingdom
| | - Jay Self
- Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Radha Ayyagari
- Shiley Eye Institute, University of California San Diego, La Jolla, California, United States of America
| | - Firoz Kabir
- National Centre of Excellence in Molecular Biology, University of the Punjab, Lahore, Pakistan
- The Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Muhammad Asif Naeem
- National Centre of Excellence in Molecular Biology, University of the Punjab, Lahore, Pakistan
| | - Muhammad Ali
- National Centre of Excellence in Molecular Biology, University of the Punjab, Lahore, Pakistan
- The Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Javed Akram
- Allama Iqbal Medical College, University of Health Sciences, Lahore, Pakistan
- National Centre for Genetic Diseases, Shaheed Zulfiqar Ali Bhutto Medical University, Islamabad, Pakistan
| | - Paul A. Sieving
- National Eye Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Sheikh Riazuddin
- National Centre of Excellence in Molecular Biology, University of the Punjab, Lahore, Pakistan
- Allama Iqbal Medical College, University of Health Sciences, Lahore, Pakistan
- National Centre for Genetic Diseases, Shaheed Zulfiqar Ali Bhutto Medical University, Islamabad, Pakistan
| | - Emma L. Baple
- RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, Exeter, United Kingdom
- Department of Clinical Genetics, Royal Devon & Exeter NHS Foundation Trust, Exeter, United Kingdom
| | - S. Amer Riazuddin
- National Centre of Excellence in Molecular Biology, University of the Punjab, Lahore, Pakistan
- The Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Andrew H. Crosby
- RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, Exeter, United Kingdom
| | - J. Fielding Hejtmancik
- Ophthalmic Genetics and Visual Function Branch, National Eye Institute, National Institutes of Health, Bethesda, Maryland, United States of America
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16
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Ahmed MY, Al-Khayat A, Al-Murshedi F, Al-Futaisi A, Chioza BA, Pedro Fernandez-Murray J, Self JE, Salter CG, Harlalka GV, Rawlins LE, Al-Zuhaibi S, Al-Azri F, Al-Rashdi F, Cazenave-Gassiot A, Wenk MR, Al-Salmi F, Patton MA, Silver DL, Baple EL, McMaster CR, Crosby AH. A mutation of EPT1 (SELENOI) underlies a new disorder of Kennedy pathway phospholipid biosynthesis. Brain 2017; 140:547-554. [PMID: 28052917 PMCID: PMC5382949 DOI: 10.1093/brain/aww318] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 10/19/2016] [Indexed: 12/20/2022] Open
Abstract
Mutations in genes involved in lipid metabolism have increasingly been associated with various subtypes of hereditary spastic paraplegia, a highly heterogeneous group of neurodegenerative motor neuron disorders characterized by spastic paraparesis. Here, we report an unusual autosomal recessive neurodegenerative condition, best classified as a complicated form of hereditary spastic paraplegia, associated with mutation in the ethanolaminephosphotransferase 1 (EPT1) gene (now known as SELENOI), responsible for the final step in Kennedy pathway forming phosphatidylethanolamine from CDP-ethanolamine. Phosphatidylethanolamine is a glycerophospholipid that, together with phosphatidylcholine, constitutes more than half of the total phospholipids in eukaryotic cell membranes. We determined that the mutation defined dramatically reduces the enzymatic activity of EPT1, thereby hindering the final step in phosphatidylethanolamine synthesis. Additionally, due to central nervous system inaccessibility we undertook quantification of phosphatidylethanolamine levels and species in patient and control blood samples as an indication of liver phosphatidylethanolamine biosynthesis. Although this revealed alteration to levels of specific phosphatidylethanolamine fatty acyl species in patients, overall phosphatidylethanolamine levels were broadly unaffected indicating that in blood EPT1 inactivity may be compensated for, in part, via alternate biochemical pathways. These studies define the first human disorder arising due to defective CDP-ethanolamine biosynthesis and provide new insight into the role of Kennedy pathway components in human neurological function.
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Affiliation(s)
- Mustafa Y Ahmed
- Medical Research (Level 4), University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon and Exeter NHS Foundation Trust, Barrack Road, Exeter, EX2 5DW, UK
| | - Aisha Al-Khayat
- Department of Biology, College of Science, Sultan Qaboos University, Sultanate of Oman
| | - Fathiya Al-Murshedi
- Department of Genetics, College of Medicine, Sultan Qaboos University, Sultanate of Oman
| | - Amna Al-Futaisi
- Department of Paediatrics, Sultan Qaboos University Hospital, Sultanate of Oman
| | - Barry A Chioza
- Medical Research (Level 4), University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon and Exeter NHS Foundation Trust, Barrack Road, Exeter, EX2 5DW, UK
| | | | - Jay E Self
- Faculty of Medicine, University of Southampton, UK
| | - Claire G Salter
- West Midlands Regional Genetics Service, Birmingham Women's NHS Foundation Trust, Mindelsohn Way, Birmingham, B15 2TG, UK
| | - Gaurav V Harlalka
- Medical Research (Level 4), University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon and Exeter NHS Foundation Trust, Barrack Road, Exeter, EX2 5DW, UK
| | - Lettie E Rawlins
- Medical Research (Level 4), University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon and Exeter NHS Foundation Trust, Barrack Road, Exeter, EX2 5DW, UK
| | - Sana Al-Zuhaibi
- Department of Ophthalmology, Sultan Qaboos University Hospital, Sultanate of Oman
| | - Faisal Al-Azri
- Department of Radiology and Molecular Imaging, Sultan Qaboos University Hospital, Sultanate of Oman
| | - Fatma Al-Rashdi
- Department of Paediatrics, Sameal Hospital, Ministry of Health, Sultanate of Oman
| | - Amaury Cazenave-Gassiot
- SLING, Life Sciences Institute, National University of Singapore, Singapore.,Department of Biochemistry, National University of Singapore, Singapore
| | - Markus R Wenk
- SLING, Life Sciences Institute, National University of Singapore, Singapore.,Department of Biochemistry, National University of Singapore, Singapore
| | - Fatema Al-Salmi
- Department of Biology, College of Science, Sultan Qaboos University, Sultanate of Oman
| | - Michael A Patton
- Medical Research (Level 4), University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon and Exeter NHS Foundation Trust, Barrack Road, Exeter, EX2 5DW, UK.,Department of Biology, College of Science, Sultan Qaboos University, Sultanate of Oman
| | - David L Silver
- Signature Research Program in Cardiovascular and Metabolic Disorders, Duke-NUS Medical School, Singapore
| | - Emma L Baple
- Medical Research (Level 4), University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon and Exeter NHS Foundation Trust, Barrack Road, Exeter, EX2 5DW, UK
| | | | - Andrew H Crosby
- Medical Research (Level 4), University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon and Exeter NHS Foundation Trust, Barrack Road, Exeter, EX2 5DW, UK
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17
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Zollo M, Ahmed M, Ferrucci V, Salpietro V, Asadzadeh F, Carotenuto M, Maroofian R, Al-Amri A, Singh R, Scognamiglio I, Mojarrad M, Musella L, Duilio A, Di Somma A, Karaca E, Rajab A, Al-Khayat A, Mohan Mohapatra T, Eslahi A, Ashrafzadeh F, Rawlins LE, Prasad R, Gupta R, Kumari P, Srivastava M, Cozzolino F, Kumar Rai S, Monti M, Harlalka GV, Simpson MA, Rich P, Al-Salmi F, Patton MA, Chioza BA, Efthymiou S, Granata F, Di Rosa G, Wiethoff S, Borgione E, Scuderi C, Mankad K, Hanna MG, Pucci P, Houlden H, Lupski JR, Crosby AH, Baple EL. PRUNE is crucial for normal brain development and mutated in microcephaly with neurodevelopmental impairment. Brain 2017; 140:940-952. [PMID: 28334956 PMCID: PMC5382943 DOI: 10.1093/brain/awx014] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 12/13/2016] [Indexed: 12/22/2022] Open
Abstract
PRUNE is a member of the DHH (Asp-His-His) phosphoesterase protein superfamily of molecules important for cell motility, and implicated in cancer progression. Here we investigated multiple families from Oman, India, Iran and Italy with individuals affected by a new autosomal recessive neurodevelopmental and degenerative disorder in which the cardinal features include primary microcephaly and profound global developmental delay. Our genetic studies identified biallelic mutations of PRUNE1 as responsible. Our functional assays of disease-associated variant alleles revealed impaired microtubule polymerization, as well as cell migration and proliferation properties, of mutant PRUNE. Additionally, our studies also highlight a potential new role for PRUNE during microtubule polymerization, which is essential for the cytoskeletal rearrangements that occur during cellular division and proliferation. Together these studies define PRUNE as a molecule fundamental for normal human cortical development and define cellular and clinical consequences associated with PRUNE mutation.
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Affiliation(s)
- Massimo Zollo
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche DMMBM, Università di Napoli Federico II, Via Sergio Pansini 5, Naples, 80131, Italy.,CEINGE Biotecnologie Avanzate, Via Gaetano Salvatore 486, Naples, Italy.,European School of Molecular Medicine, SEMM, University of Milan, Italy
| | - Mustafa Ahmed
- Medical Research (Level 4), RILD Wellcome Wolfson Centre, University of Exeter Medical School, Royal Devon & Exeter NHS Foundation Trust, Barrack Road, Exeter, EX2 5DW, UK
| | - Veronica Ferrucci
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche DMMBM, Università di Napoli Federico II, Via Sergio Pansini 5, Naples, 80131, Italy.,CEINGE Biotecnologie Avanzate, Via Gaetano Salvatore 486, Naples, Italy.,European School of Molecular Medicine, SEMM, University of Milan, Italy
| | - Vincenzo Salpietro
- Department of Molecular Neuroscience, UCL Institute of Neurology, London, UK
| | - Fatemeh Asadzadeh
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche DMMBM, Università di Napoli Federico II, Via Sergio Pansini 5, Naples, 80131, Italy.,CEINGE Biotecnologie Avanzate, Via Gaetano Salvatore 486, Naples, Italy
| | - Marianeve Carotenuto
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche DMMBM, Università di Napoli Federico II, Via Sergio Pansini 5, Naples, 80131, Italy.,CEINGE Biotecnologie Avanzate, Via Gaetano Salvatore 486, Naples, Italy
| | - Reza Maroofian
- Medical Research (Level 4), RILD Wellcome Wolfson Centre, University of Exeter Medical School, Royal Devon & Exeter NHS Foundation Trust, Barrack Road, Exeter, EX2 5DW, UK
| | - Ahmed Al-Amri
- Section of Ophthalmology and Neuroscience, Leeds Institute of Biomedical and Clinical Sciences, University of Leeds, UK.,National Genetic Centre, Directorate General of Royal Hospital, Ministry of Health, Muscat, Sultanate of Oman
| | - Royana Singh
- Molecular Genetics, Department of Anatomy, Institute of Medical Sciences, Banaras Hindu University, Varanasi -221005, UP, India
| | - Iolanda Scognamiglio
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche DMMBM, Università di Napoli Federico II, Via Sergio Pansini 5, Naples, 80131, Italy.,CEINGE Biotecnologie Avanzate, Via Gaetano Salvatore 486, Naples, Italy
| | - Majid Mojarrad
- Department of Medical Genetics, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.,Medical Genetics Research Center, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Luca Musella
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche DMMBM, Università di Napoli Federico II, Via Sergio Pansini 5, Naples, 80131, Italy.,CEINGE Biotecnologie Avanzate, Via Gaetano Salvatore 486, Naples, Italy
| | - Angela Duilio
- Dipartimento di Scienze Chimiche, Università Federico II, Naples, Italy
| | - Angela Di Somma
- Dipartimento di Scienze Chimiche, Università Federico II, Naples, Italy
| | - Ender Karaca
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Anna Rajab
- National Genetic Centre, Directorate General of Royal Hospital, Ministry of Health, Muscat, Sultanate of Oman
| | - Aisha Al-Khayat
- Department of Biology, Sultan Qaboos University, PO Box 36, Post code 123, Sultanate of Oman
| | - Tribhuvan Mohan Mohapatra
- Molecular Genetics, Department of Anatomy, Institute of Medical Sciences, Banaras Hindu University, Varanasi -221005, UP, India
| | - Atieh Eslahi
- Department of Medical Genetics, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Farah Ashrafzadeh
- Department of Medical Genetics, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Pediatric Neurology, Ghaem Medical Center, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Zip Code- 9919991766, Iran
| | - Lettie E Rawlins
- Medical Research (Level 4), RILD Wellcome Wolfson Centre, University of Exeter Medical School, Royal Devon & Exeter NHS Foundation Trust, Barrack Road, Exeter, EX2 5DW, UK
| | - Rajniti Prasad
- Department of Pediatrics, Institute of Medical Sciences, Banaras Hindu University, Varanasi -221005, UP, India
| | - Rashmi Gupta
- Molecular Genetics, Department of Anatomy, Institute of Medical Sciences, Banaras Hindu University, Varanasi -221005, UP, India
| | - Preeti Kumari
- Molecular Genetics, Department of Anatomy, Institute of Medical Sciences, Banaras Hindu University, Varanasi -221005, UP, India
| | - Mona Srivastava
- Molecular Genetics, Department of Anatomy, Institute of Medical Sciences, Banaras Hindu University, Varanasi -221005, UP, India.,Department of Psychiatry, Institute of Medical Sciences, Banaras Hindu University, Varanasi -221005, UP, India
| | - Flora Cozzolino
- CEINGE Biotecnologie Avanzate, Via Gaetano Salvatore 486, Naples, Italy
| | - Sunil Kumar Rai
- Molecular Genetics, Department of Anatomy, Institute of Medical Sciences, Banaras Hindu University, Varanasi -221005, UP, India
| | - Maria Monti
- CEINGE Biotecnologie Avanzate, Via Gaetano Salvatore 486, Naples, Italy.,Dipartimento di Scienze Chimiche, Università Federico II, Naples, Italy
| | - Gaurav V Harlalka
- Medical Research (Level 4), RILD Wellcome Wolfson Centre, University of Exeter Medical School, Royal Devon & Exeter NHS Foundation Trust, Barrack Road, Exeter, EX2 5DW, UK
| | - Michael A Simpson
- Department of Medical and Molecular Genetics, Division of Genetics and Molecular Medicine, King's College London, London, UK
| | - Philip Rich
- Department of Neuroradiology, St. George's Hospital, London, UK
| | - Fatema Al-Salmi
- Department of Biology, Sultan Qaboos University, PO Box 36, Post code 123, Sultanate of Oman
| | - Michael A Patton
- Medical Research (Level 4), RILD Wellcome Wolfson Centre, University of Exeter Medical School, Royal Devon & Exeter NHS Foundation Trust, Barrack Road, Exeter, EX2 5DW, UK.,Department of Biology, Sultan Qaboos University, PO Box 36, Post code 123, Sultanate of Oman.,Genetics Research Centre, St. George's, University of London, London, SW17 0RE, UK
| | - Barry A Chioza
- Medical Research (Level 4), RILD Wellcome Wolfson Centre, University of Exeter Medical School, Royal Devon & Exeter NHS Foundation Trust, Barrack Road, Exeter, EX2 5DW, UK
| | - Stephanie Efthymiou
- Department of Molecular Neuroscience, UCL Institute of Neurology, London, UK
| | - Francesca Granata
- Unit of Neuroradiology, Department of Biomedical Science and Morphological and Functional Images, University of Messina, Messina, Italy
| | - Gabriella Di Rosa
- Unit of Child Neurology and Psychiatry, Department of Human Pathology of the Adult and Developmental Age, University of Messina, Messina, Italy
| | - Sarah Wiethoff
- Department of Molecular Neuroscience, UCL Institute of Neurology, London, UK
| | - Eugenia Borgione
- Unit of Neuromuscular disorders, IRCCS Oasi Maria SS Troina, Enna, Italy
| | - Carmela Scuderi
- Unit of Neuromuscular disorders, IRCCS Oasi Maria SS Troina, Enna, Italy
| | - Kshitij Mankad
- Department of Neuroradiology, Great Ormond Street Hospital for Children, London WC1N 3JH, UK
| | - Michael G Hanna
- Department of Molecular Neuroscience, UCL Institute of Neurology, London, UK.,MRC Centre for Neuromuscular Diseases, UCL Institute of Neurology, London WC1N 3BG, UK
| | - Piero Pucci
- CEINGE Biotecnologie Avanzate, Via Gaetano Salvatore 486, Naples, Italy.,Dipartimento di Scienze Chimiche, Università Federico II, Naples, Italy
| | - Henry Houlden
- Department of Molecular Neuroscience, UCL Institute of Neurology, London, UK
| | - James R Lupski
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA.,Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX 77030, USA.,Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030, USA.,Texas Children's Hospital, Houston, TX 77030, USA
| | - Andrew H Crosby
- Medical Research (Level 4), RILD Wellcome Wolfson Centre, University of Exeter Medical School, Royal Devon & Exeter NHS Foundation Trust, Barrack Road, Exeter, EX2 5DW, UK
| | - Emma L Baple
- Medical Research (Level 4), RILD Wellcome Wolfson Centre, University of Exeter Medical School, Royal Devon & Exeter NHS Foundation Trust, Barrack Road, Exeter, EX2 5DW, UK
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18
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Muggenthaler MMA, Chowdhury B, Hasan SN, Cross HE, Mark B, Harlalka GV, Patton MA, Ishida M, Behr ER, Sharma S, Zahka K, Faqeih E, Blakley B, Jackson M, Lees M, Dolinsky V, Cross L, Stanier P, Salter C, Baple EL, Alkuraya FS, Crosby AH, Triggs-Raine B, Chioza BA. Mutations in HYAL2, Encoding Hyaluronidase 2, Cause a Syndrome of Orofacial Clefting and Cor Triatriatum Sinister in Humans and Mice. PLoS Genet 2017; 13:e1006470. [PMID: 28081210 PMCID: PMC5230738 DOI: 10.1371/journal.pgen.1006470] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Accepted: 11/08/2016] [Indexed: 01/25/2023] Open
Abstract
Orofacial clefting is amongst the most common of birth defects, with both genetic and environmental components. Although numerous studies have been undertaken to investigate the complexities of the genetic etiology of this heterogeneous condition, this factor remains incompletely understood. Here, we describe mutations in the HYAL2 gene as a cause of syndromic orofacial clefting. HYAL2, encoding hyaluronidase 2, degrades extracellular hyaluronan, a critical component of the developing heart and palatal shelf matrix. Transfection assays demonstrated that the gene mutations destabilize the molecule, dramatically reducing HYAL2 protein levels. Consistent with the clinical presentation in affected individuals, investigations of Hyal2-/- mice revealed craniofacial abnormalities, including submucosal cleft palate. In addition, cor triatriatum sinister and hearing loss, identified in a proportion of Hyal2-/- mice, were also found as incompletely penetrant features in affected humans. Taken together our findings identify a new genetic cause of orofacial clefting in humans and mice, and define the first molecular cause of human cor triatriatum sinister, illustrating the fundamental importance of HYAL2 and hyaluronan turnover for normal human and mouse development.
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Affiliation(s)
| | - Biswajit Chowdhury
- Department of Biochemistry & Medical Genetics, University of Manitoba, Winnipeg, Manitoba, Canada
| | - S. Naimul Hasan
- Department of Biochemistry & Medical Genetics, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Harold E. Cross
- Department of Ophthalmology, University of Arizona College of Medicine, Tucson, Arizona, United States of America
| | - Brian Mark
- Department of Microbiology, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Gaurav V. Harlalka
- RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, United Kingdom
| | - Michael A. Patton
- RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, United Kingdom
- Genetics Research Centre, St George’s University London, London, United Kingdom
| | - Miho Ishida
- Genetics and Genomic Medicine, UCL Institute of Child Health, London, United Kingdom
| | - Elijah R. Behr
- Cardiovascular Sciences Research Centre, St George's University of London, London, United Kingdom
| | - Sanjay Sharma
- Cardiovascular Sciences Research Centre, St George's University of London, London, United Kingdom
| | - Kenneth Zahka
- Pediatric Cardiology, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Eissa Faqeih
- Department of Pediatric Subspecialties, Children’s Hospital, King Fahad Medical City, Riyadh, Saudi Arabia
| | - Brian Blakley
- Department of Otolaryngology, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Mike Jackson
- Department of Small Animal and Materials Imaging Facility, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Melissa Lees
- Department of Clinical Genetics, Great Ormond Street Hospital, London, United Kingdom
| | - Vernon Dolinsky
- Pharmacology & Therapeutics, University of Manitoba, Winnipeg, Manitoba, Canada
- Pediatrics & Child Health, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Leroy Cross
- Windows of Hope Genetic Information Centre, Holmes County, Ohio, United States of America
| | - Philip Stanier
- Genetics and Genomic Medicine, UCL Institute of Child Health, London, United Kingdom
| | - Claire Salter
- Human Genetics and Genomic Medicine, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Emma L. Baple
- RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, United Kingdom
| | - Fowzan S. Alkuraya
- Department of Genetics, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
- Department of Anatomy and Cell Biology, College of Medicine, Alfaisal University, Riyadh, Saudi Arabia
| | - Andrew H. Crosby
- RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, United Kingdom
- * E-mail: (AHC); (BTR)
| | - Barbara Triggs-Raine
- Department of Biochemistry & Medical Genetics, University of Manitoba, Winnipeg, Manitoba, Canada
- Pediatrics & Child Health, University of Manitoba, Winnipeg, Manitoba, Canada
- Manitoba Institute of Child Health, Winnipeg, Manitoba, Canada
- * E-mail: (AHC); (BTR)
| | - Barry A. Chioza
- RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, United Kingdom
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19
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Aharoni S, Barwick KES, Straussberg R, Harlalka GV, Nevo Y, Chioza BA, McEntagart MM, Mimouni-Bloch A, Weedon M, Crosby AH. Novel homozygous missense mutation in GAN associated with Charcot-Marie-Tooth disease type 2 in a large consanguineous family from Israel. BMC Med Genet 2016; 17:82. [PMID: 27852232 PMCID: PMC5112725 DOI: 10.1186/s12881-016-0343-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Accepted: 11/07/2016] [Indexed: 11/18/2022]
Abstract
Background CMT-2 is a clinically and genetically heterogeneous group of peripheral axonal neuropathies characterized by slowly progressive weakness and atrophy of distal limb muscles resulting from length-dependent motor and sensory neurodegeneration. Classical giant axonal neuropathy (GAN) is an autosomal recessively inherited progressive neurodegenerative disorder of the peripheral and central nervous systems, typically diagnosed in early childhood and resulting in death by the end of the third decade. Distinctive phenotypic features are the presence of “kinky” hair and long eyelashes. The genetic basis of the disease has been well established, with over 40 associated mutations identified in the gene GAN, encoding the BTB-KELCH protein gigaxonin, involved in intermediate filament regulation. Methods An Illumina Human CytoSNP-12 array followed by whole exome sequence analysis was used to identify the disease associated gene mutation in a large consanguineous family diagnosed with Charcot-Marie-Tooth disease type 2 (CMT-2) from which all but one affected member had straight hair. Results Here we report the identification of a novel GAN missense mutation underlying the CMT-2 phenotype observed in this family. Although milder forms of GAN, with and without the presence of kinky hair have been reported previously, a phenotype distinct from that was investigated in this study. All family members lacked common features of GAN, including ataxia, nystagmus, intellectual disability, seizures, and central nervous system involvement. Conclusions Our findings broaden the spectrum of phenotypes associated with GAN mutations and emphasize a need to proceed with caution when providing families with diagnostic or prognostic information based on either clinical or genetic findings alone.
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Affiliation(s)
- Sharon Aharoni
- Department of Neurology, Schneider Children's Medical Center of Israel, Petach Tikva, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Katy E S Barwick
- Medical Research, RILD Wellcome Wolfson Centre (Level 4), Royal Devon and Exeter NHS Foundation Trust, Exeter, Devon, EX2 5DW, UK
| | - Rachel Straussberg
- Department of Neurology, Schneider Children's Medical Center of Israel, Petach Tikva, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Gaurav V Harlalka
- Medical Research, RILD Wellcome Wolfson Centre (Level 4), Royal Devon and Exeter NHS Foundation Trust, Exeter, Devon, EX2 5DW, UK
| | - Yoram Nevo
- Department of Neurology, Schneider Children's Medical Center of Israel, Petach Tikva, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Barry A Chioza
- Medical Research, RILD Wellcome Wolfson Centre (Level 4), Royal Devon and Exeter NHS Foundation Trust, Exeter, Devon, EX2 5DW, UK
| | - Meriel M McEntagart
- Medical Genetics Unit, Floor 0, Jenner Wing, St. George's University of London, Cranmer Terrace, London, SW17 0RE, UK
| | - Aviva Mimouni-Bloch
- The Pediatric Neurology and Developmental Unit, Loewenstein Rehabilitation Hospital, Raanana, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Michael Weedon
- Medical Research, Diabetes group, RILD Wellcome Wolfson Centre (Level 3), Royal Devon and Exeter NHS Foundation Trust, Exeter, Devon, EX2 5DW, UK
| | - Andrew H Crosby
- Medical Research, RILD Wellcome Wolfson Centre (Level 4), Royal Devon and Exeter NHS Foundation Trust, Exeter, Devon, EX2 5DW, UK.
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20
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Harlalka GV, McEntagart ME, Gupta N, Skrzypiec AE, Mucha MW, Chioza BA, Simpson MA, Sreekantan-Nair A, Pereira A, Günther S, Jahic A, Modarres H, Moore-Barton H, Trembath RC, Kabra M, Baple EL, Thakur S, Patton MA, Beetz C, Pawlak R, Crosby AH. Novel Genetic, Clinical, and Pathomechanistic Insights into TFG-Associated Hereditary Spastic Paraplegia. Hum Mutat 2016; 37:1157-1161. [PMID: 27492651 DOI: 10.1002/humu.23060] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Accepted: 07/30/2016] [Indexed: 11/05/2022]
Abstract
Hereditary spastic paraplegias (HSPs) are genetically and clinically heterogeneous axonopathies primarily affecting upper motor neurons and, in complex forms, additional neurons. Here, we report two families with distinct recessive mutations in TFG, previously suggested to cause HSP based on findings in a single small family with complex HSP. The first carried a homozygous c.317G>A (p.R106H) variant and presented with pure HSP. The second carried the same homozygous c.316C>T (p.R106C) variant previously reported and displayed a similarly complex phenotype including optic atrophy. Haplotyping and bisulfate sequencing revealed evidence for a c.316C>T founder allele, as well as for a c.316_317 mutation hotspot. Expression of mutant TFG proteins in cultured neurons revealed mitochondrial fragmentation, the extent of which correlated with clinical severity. Our findings confirm the causal nature of bi-allelic TFG mutations for HSP, broaden the clinical and mutational spectra, and suggest mitochondrial impairment to represent a pathomechanistic link to other neurodegenerative conditions.
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Affiliation(s)
- Gaurav V Harlalka
- University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, Barrack Road, Exeter, UK
| | - Meriel E McEntagart
- Medical Genetics Unit, Floor 0, Jenner Wing, St. George's University of London, Cranmer Terrace, London, UK
| | - Neerja Gupta
- Division of Genetics, Department of Pediatrics, Old O.T. Block, All India Institute of Medical Sciences, New Delhi, India
| | - Anna E Skrzypiec
- Laboratory of Neuronal Plasticity and Behaviour, University of Exeter Medical School, University of Exeter, Exeter, UK
| | - Mariusz W Mucha
- Laboratory of Neuronal Plasticity and Behaviour, University of Exeter Medical School, University of Exeter, Exeter, UK
| | - Barry A Chioza
- University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, Barrack Road, Exeter, UK
| | - Michael A Simpson
- Division of Genetics and Molecular Medicine, King's College London School of Medicine, Guy's Hospital, London, UK
| | - Ajith Sreekantan-Nair
- University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, Barrack Road, Exeter, UK
| | - Anthony Pereira
- Department of Neurology, Atkinson Morley Wing, St. George's Hospital, Tooting, London, UK
| | - Sven Günther
- Department of Clinical Chemistry and Laboratory Medicine, Jena University Hospital, Jena, Germany
| | - Amir Jahic
- Department of Clinical Chemistry and Laboratory Medicine, Jena University Hospital, Jena, Germany
| | - Hamid Modarres
- Department of Neurology, Atkinson Morley Wing, St. George's Hospital, Tooting, London, UK
| | - Heather Moore-Barton
- Medical Genetics Unit, Floor 0, Jenner Wing, St. George's University of London, Cranmer Terrace, London, UK
| | - Richard C Trembath
- Division of Genetics and Molecular Medicine, King's College London School of Medicine, Guy's Hospital, London, UK
| | - Madhulika Kabra
- Division of Genetics, Department of Pediatrics, Old O.T. Block, All India Institute of Medical Sciences, New Delhi, India
| | - Emma L Baple
- University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, Barrack Road, Exeter, UK
| | - Seema Thakur
- Department of Genetics and Fetal Medicine, Fortis La femme, S-549, New Delhi, India
| | - Michael A Patton
- Medical Genetics Unit, Floor 0, Jenner Wing, St. George's University of London, Cranmer Terrace, London, UK
| | - Christian Beetz
- Department of Clinical Chemistry and Laboratory Medicine, Jena University Hospital, Jena, Germany.
| | - Robert Pawlak
- Laboratory of Neuronal Plasticity and Behaviour, University of Exeter Medical School, University of Exeter, Exeter, UK
| | - Andrew H Crosby
- University of Exeter Medical School, RILD Wellcome Wolfson Centre, Royal Devon & Exeter NHS Foundation Trust, Barrack Road, Exeter, UK
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21
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Jinks RN, Puffenberger EG, Baple E, Harding B, Crino P, Fogo AB, Wenger O, Xin B, Koehler AE, McGlincy MH, Provencher MM, Smith JD, Tran L, Al Turki S, Chioza BA, Cross H, Harlalka GV, Hurles ME, Maroofian R, Heaps AD, Morton MC, Stempak L, Hildebrandt F, Sadowski CE, Zaritsky J, Campellone K, Morton DH, Wang H, Crosby A, Strauss KA. Recessive nephrocerebellar syndrome on the Galloway-Mowat syndrome spectrum is caused by homozygous protein-truncating mutations of WDR73. Brain 2015; 138:2173-90. [PMID: 26070982 PMCID: PMC4511861 DOI: 10.1093/brain/awv153] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Accepted: 04/14/2015] [Indexed: 12/20/2022] Open
Abstract
Galloway-Mowat syndrome (GMS) is a neurodevelopmental disorder characterized by microcephaly, cerebellar hypoplasia, nephrosis, and profound intellectual disability. Jinks et al. extend the GMS spectrum by identifying a novel nephrocerebellar syndrome with selective striatal cholinergic interneuron loss and complete lateral geniculate nucleus delamination, caused by a frameshift mutation in WDR73. We describe a novel nephrocerebellar syndrome on the Galloway-Mowat syndrome spectrum among 30 children (ages 1.0 to 28 years) from diverse Amish demes. Children with nephrocerebellar syndrome had progressive microcephaly, visual impairment, stagnant psychomotor development, abnormal extrapyramidal movements and nephrosis. Fourteen died between ages 2.7 and 28 years, typically from renal failure. Post-mortem studies revealed (i) micrencephaly without polymicrogyria or heterotopia; (ii) atrophic cerebellar hemispheres with stunted folia, profound granule cell depletion, Bergmann gliosis, and signs of Purkinje cell deafferentation; (iii) selective striatal cholinergic interneuron loss; and (iv) optic atrophy with delamination of the lateral geniculate nuclei. Renal tissue showed focal and segmental glomerulosclerosis and extensive effacement and microvillus transformation of podocyte foot processes. Nephrocerebellar syndrome mapped to 700 kb on chromosome 15, which contained a single novel homozygous frameshift variant (WDR73 c.888delT; p.Phe296Leufs*26). WDR73 protein is expressed in human cerebral cortex, hippocampus, and cultured embryonic kidney cells. It is concentrated at mitotic microtubules and interacts with α-, β-, and γ-tubulin, heat shock proteins 70 and 90 (HSP-70; HSP-90), and the carbamoyl phosphate synthetase 2/aspartate transcarbamylase/dihydroorotase multi-enzyme complex. Recombinant WDR73 p.Phe296Leufs*26 and p.Arg256Profs*18 proteins are truncated, unstable, and show increased interaction with α- and β-tubulin and HSP-70/HSP-90. Fibroblasts from patients homozygous for WDR73 p.Phe296Leufs*26 proliferate poorly in primary culture and senesce early. Our data suggest that in humans, WDR73 interacts with mitotic microtubules to regulate cell cycle progression, proliferation and survival in brain and kidney. We extend the Galloway-Mowat syndrome spectrum with the first description of diencephalic and striatal neuropathology.
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Affiliation(s)
- Robert N Jinks
- 1 Department of Biology and Biological Foundations of Behaviour Program, Franklin and Marshall College, Lancaster, PA 17604, USA
| | - Erik G Puffenberger
- 1 Department of Biology and Biological Foundations of Behaviour Program, Franklin and Marshall College, Lancaster, PA 17604, USA 2 Clinic for Special Children, Strasburg, PA 17579, USA
| | - Emma Baple
- 3 RILD Wellcome Wolfson Centre, Royal Devon and Exeter NHS Foundation Trust, Barrack Road, Exeter, EX2 5DW, UK 4 Human Genetics and Genomic Medicine, Faculty of Medicine, University of Southampton, UK 5 Wessex Clinical Genetics Service, Princess Anne Hospital, Southampton, UK
| | - Brian Harding
- 6 Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia and Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Peter Crino
- 7 Shriners Hospital Paediatric Research Centre, Temple University School of Medicine, Philadelphia, PA 19140, USA
| | - Agnes B Fogo
- 8 Division of Renal Pathology, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Olivia Wenger
- 9 New Leaf Clinic for Special Children, Mount Eaton, OH 44659, USA 10 Department of Paediatrics, Akron Children's Hospital, Akron, OH 44302, USA
| | - Baozhong Xin
- 11 DDC Clinic for Special Needs Children, Middlefield, OH 44062, USA
| | - Alanna E Koehler
- 1 Department of Biology and Biological Foundations of Behaviour Program, Franklin and Marshall College, Lancaster, PA 17604, USA
| | - Madeleine H McGlincy
- 1 Department of Biology and Biological Foundations of Behaviour Program, Franklin and Marshall College, Lancaster, PA 17604, USA
| | - Margaret M Provencher
- 1 Department of Biology and Biological Foundations of Behaviour Program, Franklin and Marshall College, Lancaster, PA 17604, USA
| | - Jeffrey D Smith
- 1 Department of Biology and Biological Foundations of Behaviour Program, Franklin and Marshall College, Lancaster, PA 17604, USA
| | - Linh Tran
- 1 Department of Biology and Biological Foundations of Behaviour Program, Franklin and Marshall College, Lancaster, PA 17604, USA
| | - Saeed Al Turki
- 12 Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1SA, UK
| | - Barry A Chioza
- 13 Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter EX1 2LU, UK
| | - Harold Cross
- 14 Department of Ophthalmology, University of Arizona College of Medicine, Tucson, AZ 85711, USA
| | - Gaurav V Harlalka
- 13 Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter EX1 2LU, UK
| | - Matthew E Hurles
- 12 Wellcome Trust Sanger Institute, Hinxton, Cambridge CB10 1SA, UK
| | - Reza Maroofian
- 13 Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter EX1 2LU, UK
| | - Adam D Heaps
- 2 Clinic for Special Children, Strasburg, PA 17579, USA
| | - Mary C Morton
- 2 Clinic for Special Children, Strasburg, PA 17579, USA
| | - Lisa Stempak
- 15 Department of Pathology, University Hospitals Case Medical Centre, Cleveland, OH 44106, USA 16 Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Friedhelm Hildebrandt
- 17 Howard Hughes Medical Institute, Chevy Chase, MD 20815, USA 18 Division of Nephrology, Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Carolin E Sadowski
- 18 Division of Nephrology, Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Joshua Zaritsky
- 19 Department of Paediatrics, Nemours/Alfred I. DuPont Hospital for Children, Wilmington, DE 19803, USA
| | - Kenneth Campellone
- 20 Department of Molecular and Cell Biology and Institute for Systems Genomics, University of Connecticut, Storrs, CT 06269, USA
| | - D Holmes Morton
- 1 Department of Biology and Biological Foundations of Behaviour Program, Franklin and Marshall College, Lancaster, PA 17604, USA 2 Clinic for Special Children, Strasburg, PA 17579, USA 21 Lancaster General Hospital, Lancaster, PA 17602, USA
| | - Heng Wang
- 11 DDC Clinic for Special Needs Children, Middlefield, OH 44062, USA 22 Department of Paediatrics, Rainbow Babies and Children's Hospital and Department of Molecular Cardiology, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Andrew Crosby
- 3 RILD Wellcome Wolfson Centre, Royal Devon and Exeter NHS Foundation Trust, Barrack Road, Exeter, EX2 5DW, UK
| | - Kevin A Strauss
- 1 Department of Biology and Biological Foundations of Behaviour Program, Franklin and Marshall College, Lancaster, PA 17604, USA 2 Clinic for Special Children, Strasburg, PA 17579, USA 21 Lancaster General Hospital, Lancaster, PA 17602, USA
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22
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Baple EL, Chambers H, Cross HE, Fawcett H, Nakazawa Y, Chioza BA, Harlalka GV, Mansour S, Sreekantan-Nair A, Patton MA, Muggenthaler M, Rich P, Wagner K, Coblentz R, Stein CK, Last JI, Taylor AMR, Jackson AP, Ogi T, Lehmann AR, Green CM, Crosby AH. Hypomorphic PCNA mutation underlies a human DNA repair disorder. J Clin Invest 2014; 124:3137-46. [PMID: 24911150 PMCID: PMC4071375 DOI: 10.1172/jci74593] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Accepted: 04/17/2014] [Indexed: 11/17/2022] Open
Abstract
Numerous human disorders, including Cockayne syndrome, UV-sensitive syndrome, xeroderma pigmentosum, and trichothiodystrophy, result from the mutation of genes encoding molecules important for nucleotide excision repair. Here, we describe a syndrome in which the cardinal clinical features include short stature, hearing loss, premature aging, telangiectasia, neurodegeneration, and photosensitivity, resulting from a homozygous missense (p.Ser228Ile) sequence alteration of the proliferating cell nuclear antigen (PCNA). PCNA is a highly conserved sliding clamp protein essential for DNA replication and repair. Due to this fundamental role, mutations in PCNA that profoundly impair protein function would be incompatible with life. Interestingly, while the p.Ser228Ile alteration appeared to have no effect on protein levels or DNA replication, patient cells exhibited marked abnormalities in response to UV irradiation, displaying substantial reductions in both UV survival and RNA synthesis recovery. The p.Ser228Ile change also profoundly altered PCNA's interaction with Flap endonuclease 1 and DNA Ligase 1, DNA metabolism enzymes. Together, our findings detail a mutation of PCNA in humans associated with a neurodegenerative phenotype, displaying clinical and molecular features common to other DNA repair disorders, which we showed to be attributable to a hypomorphic amino acid alteration.
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Affiliation(s)
- Emma L. Baple
- Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, Devon, United Kingdom. Department of Zoology, University of Cambridge, Cambridge, United Kingdom. Department of Ophthalmology, University of Arizona College of Medicine, Tucson, Arizona, USA. Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton, United Kingdom. Nagasaki University Research Centre for Genomic Instability and Carcinogenesis (NRGIC), Nagasaki, Japan. Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan. SW Thames Regional Genetics Service, St. George’s Healthcare NHS Trust, London, United Kingdom. Department of Neuroradiology, St. George’s Hospital, London, United Kingdom. Windows of Hope Genetic Study, Walnut Creek, Ohio, USA. SUNY Upstate Medical University, Syracuse, New York, USA. School of Cancer Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom. MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom. Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Helen Chambers
- Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, Devon, United Kingdom. Department of Zoology, University of Cambridge, Cambridge, United Kingdom. Department of Ophthalmology, University of Arizona College of Medicine, Tucson, Arizona, USA. Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton, United Kingdom. Nagasaki University Research Centre for Genomic Instability and Carcinogenesis (NRGIC), Nagasaki, Japan. Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan. SW Thames Regional Genetics Service, St. George’s Healthcare NHS Trust, London, United Kingdom. Department of Neuroradiology, St. George’s Hospital, London, United Kingdom. Windows of Hope Genetic Study, Walnut Creek, Ohio, USA. SUNY Upstate Medical University, Syracuse, New York, USA. School of Cancer Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom. MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom. Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Harold E. Cross
- Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, Devon, United Kingdom. Department of Zoology, University of Cambridge, Cambridge, United Kingdom. Department of Ophthalmology, University of Arizona College of Medicine, Tucson, Arizona, USA. Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton, United Kingdom. Nagasaki University Research Centre for Genomic Instability and Carcinogenesis (NRGIC), Nagasaki, Japan. Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan. SW Thames Regional Genetics Service, St. George’s Healthcare NHS Trust, London, United Kingdom. Department of Neuroradiology, St. George’s Hospital, London, United Kingdom. Windows of Hope Genetic Study, Walnut Creek, Ohio, USA. SUNY Upstate Medical University, Syracuse, New York, USA. School of Cancer Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom. MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom. Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Heather Fawcett
- Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, Devon, United Kingdom. Department of Zoology, University of Cambridge, Cambridge, United Kingdom. Department of Ophthalmology, University of Arizona College of Medicine, Tucson, Arizona, USA. Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton, United Kingdom. Nagasaki University Research Centre for Genomic Instability and Carcinogenesis (NRGIC), Nagasaki, Japan. Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan. SW Thames Regional Genetics Service, St. George’s Healthcare NHS Trust, London, United Kingdom. Department of Neuroradiology, St. George’s Hospital, London, United Kingdom. Windows of Hope Genetic Study, Walnut Creek, Ohio, USA. SUNY Upstate Medical University, Syracuse, New York, USA. School of Cancer Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom. MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom. Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Yuka Nakazawa
- Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, Devon, United Kingdom. Department of Zoology, University of Cambridge, Cambridge, United Kingdom. Department of Ophthalmology, University of Arizona College of Medicine, Tucson, Arizona, USA. Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton, United Kingdom. Nagasaki University Research Centre for Genomic Instability and Carcinogenesis (NRGIC), Nagasaki, Japan. Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan. SW Thames Regional Genetics Service, St. George’s Healthcare NHS Trust, London, United Kingdom. Department of Neuroradiology, St. George’s Hospital, London, United Kingdom. Windows of Hope Genetic Study, Walnut Creek, Ohio, USA. SUNY Upstate Medical University, Syracuse, New York, USA. School of Cancer Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom. MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom. Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Barry A. Chioza
- Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, Devon, United Kingdom. Department of Zoology, University of Cambridge, Cambridge, United Kingdom. Department of Ophthalmology, University of Arizona College of Medicine, Tucson, Arizona, USA. Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton, United Kingdom. Nagasaki University Research Centre for Genomic Instability and Carcinogenesis (NRGIC), Nagasaki, Japan. Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan. SW Thames Regional Genetics Service, St. George’s Healthcare NHS Trust, London, United Kingdom. Department of Neuroradiology, St. George’s Hospital, London, United Kingdom. Windows of Hope Genetic Study, Walnut Creek, Ohio, USA. SUNY Upstate Medical University, Syracuse, New York, USA. School of Cancer Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom. MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom. Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Gaurav V. Harlalka
- Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, Devon, United Kingdom. Department of Zoology, University of Cambridge, Cambridge, United Kingdom. Department of Ophthalmology, University of Arizona College of Medicine, Tucson, Arizona, USA. Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton, United Kingdom. Nagasaki University Research Centre for Genomic Instability and Carcinogenesis (NRGIC), Nagasaki, Japan. Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan. SW Thames Regional Genetics Service, St. George’s Healthcare NHS Trust, London, United Kingdom. Department of Neuroradiology, St. George’s Hospital, London, United Kingdom. Windows of Hope Genetic Study, Walnut Creek, Ohio, USA. SUNY Upstate Medical University, Syracuse, New York, USA. School of Cancer Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom. MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom. Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Sahar Mansour
- Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, Devon, United Kingdom. Department of Zoology, University of Cambridge, Cambridge, United Kingdom. Department of Ophthalmology, University of Arizona College of Medicine, Tucson, Arizona, USA. Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton, United Kingdom. Nagasaki University Research Centre for Genomic Instability and Carcinogenesis (NRGIC), Nagasaki, Japan. Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan. SW Thames Regional Genetics Service, St. George’s Healthcare NHS Trust, London, United Kingdom. Department of Neuroradiology, St. George’s Hospital, London, United Kingdom. Windows of Hope Genetic Study, Walnut Creek, Ohio, USA. SUNY Upstate Medical University, Syracuse, New York, USA. School of Cancer Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom. MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom. Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Ajith Sreekantan-Nair
- Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, Devon, United Kingdom. Department of Zoology, University of Cambridge, Cambridge, United Kingdom. Department of Ophthalmology, University of Arizona College of Medicine, Tucson, Arizona, USA. Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton, United Kingdom. Nagasaki University Research Centre for Genomic Instability and Carcinogenesis (NRGIC), Nagasaki, Japan. Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan. SW Thames Regional Genetics Service, St. George’s Healthcare NHS Trust, London, United Kingdom. Department of Neuroradiology, St. George’s Hospital, London, United Kingdom. Windows of Hope Genetic Study, Walnut Creek, Ohio, USA. SUNY Upstate Medical University, Syracuse, New York, USA. School of Cancer Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom. MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom. Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Michael A. Patton
- Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, Devon, United Kingdom. Department of Zoology, University of Cambridge, Cambridge, United Kingdom. Department of Ophthalmology, University of Arizona College of Medicine, Tucson, Arizona, USA. Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton, United Kingdom. Nagasaki University Research Centre for Genomic Instability and Carcinogenesis (NRGIC), Nagasaki, Japan. Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan. SW Thames Regional Genetics Service, St. George’s Healthcare NHS Trust, London, United Kingdom. Department of Neuroradiology, St. George’s Hospital, London, United Kingdom. Windows of Hope Genetic Study, Walnut Creek, Ohio, USA. SUNY Upstate Medical University, Syracuse, New York, USA. School of Cancer Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom. MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom. Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Martina Muggenthaler
- Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, Devon, United Kingdom. Department of Zoology, University of Cambridge, Cambridge, United Kingdom. Department of Ophthalmology, University of Arizona College of Medicine, Tucson, Arizona, USA. Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton, United Kingdom. Nagasaki University Research Centre for Genomic Instability and Carcinogenesis (NRGIC), Nagasaki, Japan. Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan. SW Thames Regional Genetics Service, St. George’s Healthcare NHS Trust, London, United Kingdom. Department of Neuroradiology, St. George’s Hospital, London, United Kingdom. Windows of Hope Genetic Study, Walnut Creek, Ohio, USA. SUNY Upstate Medical University, Syracuse, New York, USA. School of Cancer Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom. MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom. Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Phillip Rich
- Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, Devon, United Kingdom. Department of Zoology, University of Cambridge, Cambridge, United Kingdom. Department of Ophthalmology, University of Arizona College of Medicine, Tucson, Arizona, USA. Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton, United Kingdom. Nagasaki University Research Centre for Genomic Instability and Carcinogenesis (NRGIC), Nagasaki, Japan. Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan. SW Thames Regional Genetics Service, St. George’s Healthcare NHS Trust, London, United Kingdom. Department of Neuroradiology, St. George’s Hospital, London, United Kingdom. Windows of Hope Genetic Study, Walnut Creek, Ohio, USA. SUNY Upstate Medical University, Syracuse, New York, USA. School of Cancer Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom. MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom. Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Karin Wagner
- Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, Devon, United Kingdom. Department of Zoology, University of Cambridge, Cambridge, United Kingdom. Department of Ophthalmology, University of Arizona College of Medicine, Tucson, Arizona, USA. Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton, United Kingdom. Nagasaki University Research Centre for Genomic Instability and Carcinogenesis (NRGIC), Nagasaki, Japan. Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan. SW Thames Regional Genetics Service, St. George’s Healthcare NHS Trust, London, United Kingdom. Department of Neuroradiology, St. George’s Hospital, London, United Kingdom. Windows of Hope Genetic Study, Walnut Creek, Ohio, USA. SUNY Upstate Medical University, Syracuse, New York, USA. School of Cancer Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom. MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom. Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Roselyn Coblentz
- Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, Devon, United Kingdom. Department of Zoology, University of Cambridge, Cambridge, United Kingdom. Department of Ophthalmology, University of Arizona College of Medicine, Tucson, Arizona, USA. Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton, United Kingdom. Nagasaki University Research Centre for Genomic Instability and Carcinogenesis (NRGIC), Nagasaki, Japan. Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan. SW Thames Regional Genetics Service, St. George’s Healthcare NHS Trust, London, United Kingdom. Department of Neuroradiology, St. George’s Hospital, London, United Kingdom. Windows of Hope Genetic Study, Walnut Creek, Ohio, USA. SUNY Upstate Medical University, Syracuse, New York, USA. School of Cancer Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom. MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom. Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Constance K. Stein
- Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, Devon, United Kingdom. Department of Zoology, University of Cambridge, Cambridge, United Kingdom. Department of Ophthalmology, University of Arizona College of Medicine, Tucson, Arizona, USA. Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton, United Kingdom. Nagasaki University Research Centre for Genomic Instability and Carcinogenesis (NRGIC), Nagasaki, Japan. Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan. SW Thames Regional Genetics Service, St. George’s Healthcare NHS Trust, London, United Kingdom. Department of Neuroradiology, St. George’s Hospital, London, United Kingdom. Windows of Hope Genetic Study, Walnut Creek, Ohio, USA. SUNY Upstate Medical University, Syracuse, New York, USA. School of Cancer Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom. MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom. Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - James I. Last
- Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, Devon, United Kingdom. Department of Zoology, University of Cambridge, Cambridge, United Kingdom. Department of Ophthalmology, University of Arizona College of Medicine, Tucson, Arizona, USA. Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton, United Kingdom. Nagasaki University Research Centre for Genomic Instability and Carcinogenesis (NRGIC), Nagasaki, Japan. Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan. SW Thames Regional Genetics Service, St. George’s Healthcare NHS Trust, London, United Kingdom. Department of Neuroradiology, St. George’s Hospital, London, United Kingdom. Windows of Hope Genetic Study, Walnut Creek, Ohio, USA. SUNY Upstate Medical University, Syracuse, New York, USA. School of Cancer Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom. MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom. Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - A. Malcolm R. Taylor
- Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, Devon, United Kingdom. Department of Zoology, University of Cambridge, Cambridge, United Kingdom. Department of Ophthalmology, University of Arizona College of Medicine, Tucson, Arizona, USA. Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton, United Kingdom. Nagasaki University Research Centre for Genomic Instability and Carcinogenesis (NRGIC), Nagasaki, Japan. Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan. SW Thames Regional Genetics Service, St. George’s Healthcare NHS Trust, London, United Kingdom. Department of Neuroradiology, St. George’s Hospital, London, United Kingdom. Windows of Hope Genetic Study, Walnut Creek, Ohio, USA. SUNY Upstate Medical University, Syracuse, New York, USA. School of Cancer Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom. MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom. Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Andrew P. Jackson
- Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, Devon, United Kingdom. Department of Zoology, University of Cambridge, Cambridge, United Kingdom. Department of Ophthalmology, University of Arizona College of Medicine, Tucson, Arizona, USA. Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton, United Kingdom. Nagasaki University Research Centre for Genomic Instability and Carcinogenesis (NRGIC), Nagasaki, Japan. Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan. SW Thames Regional Genetics Service, St. George’s Healthcare NHS Trust, London, United Kingdom. Department of Neuroradiology, St. George’s Hospital, London, United Kingdom. Windows of Hope Genetic Study, Walnut Creek, Ohio, USA. SUNY Upstate Medical University, Syracuse, New York, USA. School of Cancer Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom. MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom. Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Tomoo Ogi
- Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, Devon, United Kingdom. Department of Zoology, University of Cambridge, Cambridge, United Kingdom. Department of Ophthalmology, University of Arizona College of Medicine, Tucson, Arizona, USA. Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton, United Kingdom. Nagasaki University Research Centre for Genomic Instability and Carcinogenesis (NRGIC), Nagasaki, Japan. Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan. SW Thames Regional Genetics Service, St. George’s Healthcare NHS Trust, London, United Kingdom. Department of Neuroradiology, St. George’s Hospital, London, United Kingdom. Windows of Hope Genetic Study, Walnut Creek, Ohio, USA. SUNY Upstate Medical University, Syracuse, New York, USA. School of Cancer Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom. MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom. Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Alan R. Lehmann
- Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, Devon, United Kingdom. Department of Zoology, University of Cambridge, Cambridge, United Kingdom. Department of Ophthalmology, University of Arizona College of Medicine, Tucson, Arizona, USA. Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton, United Kingdom. Nagasaki University Research Centre for Genomic Instability and Carcinogenesis (NRGIC), Nagasaki, Japan. Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan. SW Thames Regional Genetics Service, St. George’s Healthcare NHS Trust, London, United Kingdom. Department of Neuroradiology, St. George’s Hospital, London, United Kingdom. Windows of Hope Genetic Study, Walnut Creek, Ohio, USA. SUNY Upstate Medical University, Syracuse, New York, USA. School of Cancer Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom. MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom. Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Catherine M. Green
- Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, Devon, United Kingdom. Department of Zoology, University of Cambridge, Cambridge, United Kingdom. Department of Ophthalmology, University of Arizona College of Medicine, Tucson, Arizona, USA. Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton, United Kingdom. Nagasaki University Research Centre for Genomic Instability and Carcinogenesis (NRGIC), Nagasaki, Japan. Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan. SW Thames Regional Genetics Service, St. George’s Healthcare NHS Trust, London, United Kingdom. Department of Neuroradiology, St. George’s Hospital, London, United Kingdom. Windows of Hope Genetic Study, Walnut Creek, Ohio, USA. SUNY Upstate Medical University, Syracuse, New York, USA. School of Cancer Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom. MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom. Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Andrew H. Crosby
- Medical Research, RILD Wellcome Wolfson Centre, University of Exeter Medical School, Exeter, Devon, United Kingdom. Department of Zoology, University of Cambridge, Cambridge, United Kingdom. Department of Ophthalmology, University of Arizona College of Medicine, Tucson, Arizona, USA. Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton, United Kingdom. Nagasaki University Research Centre for Genomic Instability and Carcinogenesis (NRGIC), Nagasaki, Japan. Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan. SW Thames Regional Genetics Service, St. George’s Healthcare NHS Trust, London, United Kingdom. Department of Neuroradiology, St. George’s Hospital, London, United Kingdom. Windows of Hope Genetic Study, Walnut Creek, Ohio, USA. SUNY Upstate Medical University, Syracuse, New York, USA. School of Cancer Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom. MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom. Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, United Kingdom
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23
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Harlalka GV, Lehman A, Chioza B, Baple EL, Maroofian R, Cross H, Sreekantan-Nair A, Priestman DA, Al-Turki S, McEntagart ME, Proukakis C, Royle L, Kozak RP, Bastaki L, Patton M, Wagner K, Coblentz R, Price J, Mezei M, Schlade-Bartusiak K, Platt FM, Hurles ME, Crosby AH. Mutations in B4GALNT1 (GM2 synthase) underlie a new disorder of ganglioside biosynthesis. ACTA ACUST UNITED AC 2013; 136:3618-24. [PMID: 24103911 PMCID: PMC3859217 DOI: 10.1093/brain/awt270] [Citation(s) in RCA: 105] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Glycosphingolipids are ubiquitous constituents of eukaryotic plasma membranes, and their sialylated derivatives, gangliosides, are the major class of glycoconjugates expressed by neurons. Deficiencies in their catabolic pathways give rise to a large and well-studied group of inherited disorders, the lysosomal storage diseases. Although many glycosphingolipid catabolic defects have been defined, only one proven inherited disease arising from a defect in ganglioside biosynthesis is known. This disease, because of defects in the first step of ganglioside biosynthesis (GM3 synthase), results in a severe epileptic disorder found at high frequency amongst the Old Order Amish. Here we investigated an unusual neurodegenerative phenotype, most commonly classified as a complex form of hereditary spastic paraplegia, present in families from Kuwait, Italy and the Old Order Amish. Our genetic studies identified mutations in B4GALNT1 (GM2 synthase), encoding the enzyme that catalyzes the second step in complex ganglioside biosynthesis, as the cause of this neurodegenerative phenotype. Biochemical profiling of glycosphingolipid biosynthesis confirmed a lack of GM2 in affected subjects in association with a predictable increase in levels of its precursor, GM3, a finding that will greatly facilitate diagnosis of this condition. With the description of two neurological human diseases involving defects in two sequentially acting enzymes in ganglioside biosynthesis, there is the real possibility that a previously unidentified family of ganglioside deficiency diseases exist. The study of patients and animal models of these disorders will pave the way for a greater understanding of the role gangliosides play in neuronal structure and function and provide insights into the development of effective treatment therapies.
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Affiliation(s)
- Gaurav V Harlalka
- 1 Institute of Biomedical and Clinical Science, University of Exeter Medical School, St. Luke's Campus, Heavitree Road, EX1 2LU, Exeter, Devon, UK
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24
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Harlalka GV, Baple EL, Cross H, Kühnle S, Cubillos-Rojas M, Matentzoglu K, Patton MA, Wagner K, Coblentz R, Ford DL, Mackay DJG, Chioza BA, Scheffner M, Rosa JL, Crosby AH. Mutation of HERC2 causes developmental delay with Angelman-like features. J Med Genet 2012; 50:65-73. [PMID: 23243086 DOI: 10.1136/jmedgenet-2012-101367] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [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
BACKGROUND Deregulation of the activity of the ubiquitin ligase E6AP (UBE3A) is well recognised to contribute to the development of Angelman syndrome (AS). The ubiquitin ligase HERC2, encoded by the HERC2 gene is thought to be a key regulator of E6AP. METHODS AND RESULTS Using a combination of autozygosity mapping and linkage analysis, we studied an autosomal-recessive neurodevelopmental disorder with some phenotypic similarities to AS, found among the Old Order Amish. Our molecular investigation identified a mutation in HERC2 associated with the disease phenotype. We establish that the encoded mutant HERC2 protein has a reduced half-life compared with its wild-type counterpart, which is associated with a significant reduction in HERC2 levels in affected individuals. CONCLUSIONS Our data implicate a model in which disruption of HERC2 function relates to a reduction in E6AP activity resulting in neurodevelopmental delay, suggesting a previously unrecognised role of HERC2 in the pathogenesis of AS.
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Affiliation(s)
- Gaurav V Harlalka
- Centre for Human Genetics, St George's University of London, London, UK
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Abstract
The zinc disc implantation-induced urinary bladder calculi model in the rat is commonly used for preclinical evaluation of the antiurolithiatic activity of test compounds. Certain published reports state that relatively long durations for which zinc discs must be implanted in the bladders of rats. Hence, there is a need to refine this model. These investigations aimed to determine whether long-term studies using the zinc disc implantation model provide any additional data that affect the final outcomes of the study. In this study, we evaluated the effects of a well-known antiurolithiatic polyherbal drug, Cystone, for different treatment durations of 10, 20 and 48 days postimplantation. Our results indicate that even the shortest duration of 10 days is sufficient to reveal antiurolithiatic effects of a test drug. Hence, in the zinc disc implantation-induced urinary bladder calculi model, the study duration is proposed to be minimized so as to reduce the distress caused to the rats due to long-term exposure to the implant. Further, it is suggested that the growth of the bladder calculi can be monitored by taking X-ray radiographs of the bladder deposits to decide the time to terminate the study. Use of preformed calcium oxalate crystal instead of zinc discs, as suggested in earlier reports by others, may also be considered to avoid the sacrifice of rats at the end of the study.
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Affiliation(s)
- P K Singh
- R C Patel Institute of Pharmaceutical Education and Research, Near Karwand Naka, Shirpur, Dhule District, Maharashtra, India.
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