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Zhang Y, Sun M, Li N, Zhao Y, Zhang F, Shu J, Liu Y, Cai C. Identification of a novel intronic variant of ATP6V0A2 in a Han-Chinese family with cutis laxa. Mol Biol Rep 2024; 51:498. [PMID: 38598037 DOI: 10.1007/s11033-024-09446-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Accepted: 03/13/2024] [Indexed: 04/11/2024]
Abstract
BACKGROUND Cutis laxa is a connective tissue disease caused by abnormal synthesis or secretion of skin elastic fibers, leading to skin flabby and saggy in various body parts. It can be divided into congenital cutis laxa and acquired cutis laxa, and inherited cutis laxa syndromes is more common in clinic. METHODS In this study, we reported a case of a Han-Chinese male newborn with ATP6V0A2 gene variant leading to cutis laxa. The proband was identified by whole-exome sequencing to determine the novel variant, and their parents were verified by Sanger sequencing. Bioinformatics analysis and minigene assay were used to verify the effect of this variant on splicing function. RESULTS The main manifestations of the proband are skin laxity, abnormal facial features, and enlargement of the anterior fontanelle. Whole-exome sequencing showed that the newborn carried a non-canonical splicing-site variant c.117 + 5G > T, p. (?) in ATP6V0A2 gene. Sanger sequencing showed that both parents of the proband carried the heterozygous variant. The results of bioinformatics analysis and minigene assay displayed that the variant site affected the splicing function of pre-mRNA of the ATP6V0A2 gene. CONCLUSIONS In this study, it was identified that ATP6V0A2 gene c. 117 + 5G > T may be the cause of the disease. The non-canonical splicing variants of ATP6V0A2 gene were rarely reported in the past, and this variant expanded the variants spectrum of the gene. The functional study of minigene assay plays a certain role in improving the level of evidence for the pathogenicity of splicing variants, which lays a foundation for prenatal counseling and follow-up gene therapy.
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Affiliation(s)
- Ying Zhang
- Graduate College of Tianjin Medical University, No. 22 Qixiangtai Road, Heping District, Tianjin, 300070, China
| | - Mei Sun
- Graduate College of Tianjin Medical University, No. 22 Qixiangtai Road, Heping District, Tianjin, 300070, China
| | - Na Li
- Graduate College of Tianjin Medical University, No. 22 Qixiangtai Road, Heping District, Tianjin, 300070, China
- Department of Neonatology, Tianjin Children's Hospital (Children's Hospital of Tianjin University, No. 238 Longyan Road, Beichen District, Tianjin, 300134, China
| | - Yiran Zhao
- Graduate College of Tianjin Medical University, No. 22 Qixiangtai Road, Heping District, Tianjin, 300070, China
- Maternal and Child Health Hospital of Tangshan, No. 14 Jianshe south Road, Lu nan District, Tangshan City, Hebei Province, 063000, China
| | - Fang Zhang
- Department of Neonatology, Tianjin Children's Hospital (Children's Hospital of Tianjin University, No. 238 Longyan Road, Beichen District, Tianjin, 300134, China
| | - Jianbo Shu
- Tianjin Children's Hospital (Children's Hospital of Tianjin University), No. 238 Longyan Road, Beichen District, Tianjin, 300134, China.
- Tianjin Key Laboratory of Birth Defects for Prevention and Treatment, No. 238 Longyan Road, Beichen District, Tianjin, 300134, China.
- Tianjin Pediatric Research Institute, Tianjin Children's Hospital, No. 238 Longyan Road, Beichen District, Tianjin, 300134, China.
| | - Yang Liu
- Department of Neonatology, Tianjin Children's Hospital (Children's Hospital of Tianjin University, No. 238 Longyan Road, Beichen District, Tianjin, 300134, China.
| | - Chunquan Cai
- Tianjin Children's Hospital (Children's Hospital of Tianjin University), No. 238 Longyan Road, Beichen District, Tianjin, 300134, China.
- Tianjin Key Laboratory of Birth Defects for Prevention and Treatment, No. 238 Longyan Road, Beichen District, Tianjin, 300134, China.
- Tianjin Pediatric Research Institute, Tianjin Children's Hospital, No. 238 Longyan Road, Beichen District, Tianjin, 300134, China.
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2
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Lucas AT, Lin AE, Cohen A, Muñoz W, Kahle KT, Shin JH, Buch K, Sahai I, Carroll RW. Atlantoaxial instability associated with ALDH18A1 mutation. Am J Med Genet A 2023; 191:2898-2902. [PMID: 37655511 DOI: 10.1002/ajmg.a.63388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/16/2023] [Accepted: 08/19/2023] [Indexed: 09/02/2023]
Abstract
We report a 10-year-old boy with a de novo pathogenic variant in ALDH18A1, a rare form of metabolic cutis laxa, which was complicated by atlantoaxial instability and spinal cord compression following a fall from standing height. The patient required emergent cervical spine fusion and decompression followed by a 2-month hospitalization and rehabilitation. In addition to the core clinical features of joint and skin laxity, hypotonia, and developmental delays, we expand the connective tissue phenotype by adding a new potential feature of cervical spine instability. Patients with pathogenic variants in ALDH18A1 may warrant cervical spine screening to minimize possible morbidity. Neurosurgeons, geneticists, primary care providers, and families should be aware of the increased risk of severe cervical injury from minor trauma.
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Affiliation(s)
- Alexandra T Lucas
- Division of Pediatric Critical Care Medicine, Department of Pediatrics, Mass General for Children, Boston, Massachusetts, USA
| | - Angela E Lin
- Medical Genetics, Department of Pediatrics, Mass General for Children, Boston, Massachusetts, USA
| | - Andrew Cohen
- Department of Pediatrics, MassGeneral for Children, Harvard Medical School, Boston, Massachusetts, USA
| | - William Muñoz
- Department of Neurosurgery, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Kristopher T Kahle
- Department of Neurosurgery, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - John H Shin
- Department of Neurosurgery, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Karen Buch
- Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Inderneel Sahai
- Medical Genetics, Department of Pediatrics, Mass General for Children, Boston, Massachusetts, USA
| | - Ryan W Carroll
- Division of Pediatric Critical Care Medicine, Department of Pediatrics, Mass General for Children, Boston, Massachusetts, USA
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3
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Zaman Q, Iftikhar A, Rehman G, Khan Q, Najumuddin, Jan A, Khan J, Anas M, Laiba, Umair M, Muthaffar OY, Abdulkareem AA, Bibi F, Naseer MI, Jelani M. Two novel homozygous variants of ATP6V0A2 and ALDH18A1 lead to autosomal recessive cutis laxa type 2 and 3 in two Pakistani families. J Gene Med 2023; 25:e3522. [PMID: 37119015 DOI: 10.1002/jgm.3522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 04/10/2023] [Accepted: 04/12/2023] [Indexed: 04/30/2023] Open
Abstract
BACKGROUND Autosomal recessive cutis laxa type 2A (ARCL2A; OMIM: 219200) is characterized by neurovegetative, developmental and progeroid elastic skin anomalies. It is caused by biallelic variation in ATPase, H+ transporting V0 subunit A2 (ATP6V0A2; OMIM: 611716) located on chromosome 12q24.31. Autosomal recessive cutis laxa type 3A (ARCL3A; OMIM: 219150) is another subclinical type characterized by short stature, ophthalmological abnormalities and a progeria-like appearance. The ARCL3A is caused by loss of function alterations in the aldehyde dehydrogenase 18 family member A1 (ALDH18A1; OMIM: 138250) gene located at chromosome 10q24.1. METHODS Whole-exome sequencing (WES), and Sanger sequencing were performed for molecular diagnosis. 3D protein modeling was performed to investigate the deleterious effect of the variant on protein structure. RESULTS In this study, clinical and molecular diagnosis were performed for two families, ED-01 and DWF-41, which displayed hallmark features of ARCL2A and ARCL3A, respectively. Three affected individuals in the ED-01 family (IV-4, IV-5 and V-3) displayed sagging loose skin, down-slanting palpebral fissures, excessive wrinkles on the abdomen, hands and feet, and prominent veins on the trunk. Meanwhile the affected individuals in the DWF-41 family (V-2 and V-3) had progeroid skin, short stature, dysmorphology, low muscle tone, epilepsy, lordosis, scoliosis, delayed puberty and internal genitalia. WES in the index patient (ED-01: IV-4) identified a novel homozygous deletion (NM_012463.3: c.1977_1980del; p.[Val660LeufsTer23]) in exon 16 of the ATP6V0A2 while in DWF-41 a novel homozygous missense variant (NM_001323413.1:c.1867G>A; p.[Asp623Asn]) in exon 15 of the ALDH18A1 was identified. Sanger validation in all available family members confirmed the autosomal recessive modes of inheritances in each family. Three dimensional in-silico protein modeling suggested deleterious impact of the identified variants. Furthermore, these variants were assigned class 1 or "pathogenic" as per guidelines of American College of Medical Genetics 2015. Screening of ethnically matched healthy controls (n = 200 chromosomes), excluded the presence of these variations in general population. CONCLUSIONS To the best of our knowledge, this is the first report of ATP6V0A2 and ALDH18A1 variations in the Pakhtun ethnicity of Pakistani population. The study confirms that WES can be used as a first-line diagnostic test in patients with cutis laxa, and provides basis for population screening and premarital testing to reduce the diseases burden in future generations.
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Affiliation(s)
- Qaiser Zaman
- Department of Zoology, Government Postgraduate College Dargai, Malakand, Dargai, Pakistan
- Higher Education Department, Peshawar, Khyber Pakhunkhwa, Pakistan
- Department of Zoology, Abdul Wali Khan University Mardan, Khyber Pakhtunkhwa, Pakistan
| | - Aiman Iftikhar
- Department of Zoology, Government Postgraduate College Dargai, Malakand, Dargai, Pakistan
| | - Gauhar Rehman
- Department of Zoology, Abdul Wali Khan University Mardan, Khyber Pakhtunkhwa, Pakistan
| | - Qadeem Khan
- Department of Zoology, Government Postgraduate College Dargai, Malakand, Dargai, Pakistan
| | - Najumuddin
- National Center for Bioinformatics, Quaid-I-Azam University, Islamabad, Pakistan
| | - Amin Jan
- Department of Physiology, North-West School of Medicine Peshawar, Khyber Pakhtunkhwa, Pakistan
| | - Jamshid Khan
- Department of Zoology, Government Postgraduate College Dargai, Malakand, Dargai, Pakistan
| | - Muhammad Anas
- Department of Zoology, Government Postgraduate College Dargai, Malakand, Dargai, Pakistan
| | - Laiba
- Department of Zoology, Government Postgraduate College Dargai, Malakand, Dargai, Pakistan
| | - Muhammad Umair
- Medical Genomics Research Department, King Abdullah International Medical Research Center, King Saud Bin Abdulaziz University for Health Sciences, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
- Department of Life Sciences, School of Science, University of Management and Technology, Lahore, Pakistan
| | - Osama Yousef Muthaffar
- Department of Pediatrics, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Angham Abdulrhman Abdulkareem
- Center of Excellence in Genomic Medicine Research, King Abdulaziz University, Jeddah, Saudi Arabia
- Faculty of Science, Department of Biochemistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Fehmida Bibi
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
- Special Infectious Agents Unit, King Fahd Medical Research Centre, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Muhammad Imran Naseer
- Center of Excellence in Genomic Medicine Research, King Abdulaziz University, Jeddah, Saudi Arabia
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Musharraf Jelani
- Rare Diseases Genetics and Genomics, Centre for Omic Sciences, Islamia College Peshawar, Khyber Pakhtunkhwa, Pakistan
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4
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Krarup NT, Hvidbjerg M, Zaremba T, Sommerlund M, Christensen MK. Autosomal dominant cutis laxa and critical stenosis of the left main coronary artery in a 21-year-old female with an intronic mutation in the elastin gene. Am J Med Genet A 2023; 191:1059-1064. [PMID: 36541930 DOI: 10.1002/ajmg.a.63095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 11/10/2022] [Accepted: 12/10/2022] [Indexed: 12/24/2022]
Abstract
Cutis laxa (CL) is a rare, inherited or acquired connective tissue disorder characterized by abnormal elastic fibers causing loose and redundant skin and a prematurely aged appearance. The syndrome has been associated with hypertension, but cases with early-onset ischemic heart disease have never been described. Here, we report a 21-year-old Danish female with activity-related shortness of breath and oedema of the lower extremities. The patient had a clinical diagnosis of autosomal dominant CL, but no genotyping had been performed prior to the index admission. The patient was diagnosed with ischemic heart disease, based on results of non-invasive cardiovascular imaging (including MRI and PET-CT) followed by invasive treatment of a critical left main coronary artery stenosis. Subsequent referral to genetic testing revealed a likely pathogenic intronic variant in ELN. This case report includes the clinical findings and relates these to known molecular mechanisms of CL.
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Affiliation(s)
| | - Marie Hvidbjerg
- Department of Clinical Genetics, Aalborg University Hospital, Aalborg, Denmark
| | - Tomás Zaremba
- Department of Cardiology, Aalborg University Hospital, Aalborg, Denmark
| | - Mette Sommerlund
- Department of Dermatology, Aarhus University Hospital, Aarhus, Denmark
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5
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Colonna MB, Moss T, Mokashi S, Srikanth S, Jones JR, Foley JR, Skinner C, Lichty A, Kocur A, Wood T, Stewart TM, Casero Jr. RA, Flanagan-Steet H, Edison AS, Lyons MJ, Steet R. Functional assessment of homozygous ALDH18A1 variants reveals alterations in amino acid and antioxidant metabolism. Hum Mol Genet 2023; 32:732-744. [PMID: 36067040 PMCID: PMC9941824 DOI: 10.1093/hmg/ddac226] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 07/08/2022] [Accepted: 09/01/2022] [Indexed: 11/13/2022] Open
Abstract
Mono- and bi-allelic variants in ALDH18A1 cause a spectrum of human disorders associated with cutaneous and neurological findings that overlap with both cutis laxa and spastic paraplegia. ALDH18A1 encodes the bifunctional enzyme pyrroline-5-carboxylate synthetase (P5CS) that plays a role in the de novo biosynthesis of proline and ornithine. Here we characterize a previously unreported homozygous ALDH18A1 variant (p.Thr331Pro) in four affected probands from two unrelated families, and demonstrate broad-based alterations in amino acid and antioxidant metabolism. These four patients exhibit variable developmental delay, neurological deficits and loose skin. Functional characterization of the p.Thr331Pro variant demonstrated a lack of any impact on the steady-state level of the P5CS monomer or mitochondrial localization of the enzyme, but reduced incorporation of the monomer into P5CS oligomers. Using an unlabeled NMR-based metabolomics approach in patient fibroblasts and ALDH18A1-null human embryonic kidney cells expressing the variant P5CS, we identified reduced abundance of glutamate and several metabolites derived from glutamate, including proline and glutathione. Biosynthesis of the polyamine putrescine, derived from ornithine, was also decreased in patient fibroblasts, highlighting the functional consequence on another metabolic pathway involved in antioxidant responses in the cell. RNA sequencing of patient fibroblasts revealed transcript abundance changes in several metabolic and extracellular matrix-related genes, adding further insight into pathogenic processes associated with impaired P5CS function. Together these findings shed new light on amino acid and antioxidant pathways associated with ALDH18A1-related disorders, and underscore the value of metabolomic and transcriptomic profiling to discover new pathways that impact disease pathogenesis.
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Affiliation(s)
- Maxwell B Colonna
- Complex Carbohydrate Research Center, University of Georgia, Athens, GA 30602, USA
| | - Tonya Moss
- Greenwood Genetic Center, Greenwood, SC 29646, USA
| | | | | | | | - Jackson R Foley
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins School of Medicine; Baltimore, MD 21287, USA
| | | | - Angie Lichty
- Greenwood Genetic Center, Greenwood, SC 29646, USA
| | | | - Tim Wood
- Department of Pathology and Laboratory Medicine, Children’s Hospital Colorado, Aurora, CO 80045, USA
| | - Tracy Murray Stewart
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins School of Medicine; Baltimore, MD 21287, USA
| | - Robert A Casero Jr.
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins School of Medicine; Baltimore, MD 21287, USA
| | | | - Arthur S Edison
- Complex Carbohydrate Research Center, University of Georgia, Athens, GA 30602, USA
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6
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Araújo-Vilar D, Fernández-Pombo A, Cobelo-Gómez S, Castro AI, Sánchez-Iglesias S. Lipodystrophy-associated progeroid syndromes. Hormones (Athens) 2022; 21:555-571. [PMID: 35835948 DOI: 10.1007/s42000-022-00386-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Accepted: 06/29/2022] [Indexed: 01/07/2023]
Abstract
With the exception of HIV-associated lipodystrophy, lipodystrophy syndromes are rare conditions characterized by a lack of adipose tissue, which is not generally recovered. As a consequence, an ectopic deposition of lipids frequently occurs, which usually leads to insulin resistance, atherogenic dyslipidemia, and hepatic steatosis. These disorders include certain accelerated aging syndromes or progeroid syndromes. Even though each of them has unique clinical features, most show common clinical characteristics that affect growth, skin and appendages, adipose tissue, muscle, and bone and, in some of them, life expectancy is reduced. Although the molecular bases of these Mendelian disorders are very diverse and not well known, genomic instability is frequent as a consequence of impairment of nuclear organization, chromatin structure, and DNA repair, as well as epigenetic dysregulation and mitochondrial dysfunction. In this review, the main clinical features of the lipodystrophy-associated progeroid syndromes will be described along with their causes and pathogenic mechanisms, and an attempt will be made to identify which of López-Otín's hallmarks of aging are present.
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Affiliation(s)
- David Araújo-Vilar
- UETeM-Molecular Pathology Group, Department of Psychiatry, Radiology, Public Health, Nursing and Medicine (Medicine Area), Center for Research in Molecular Medicine and Chronic Diseases (CIMUS)-IDIS, University of Santiago de Compostela, 15782, Santiago de Compostela, Spain.
- Division of Endocrinology and Nutrition, University Clinical Hospital of Santiago de Compostela, 15706, Santiago de Compostela, Spain.
| | - Antía Fernández-Pombo
- UETeM-Molecular Pathology Group, Department of Psychiatry, Radiology, Public Health, Nursing and Medicine (Medicine Area), Center for Research in Molecular Medicine and Chronic Diseases (CIMUS)-IDIS, University of Santiago de Compostela, 15782, Santiago de Compostela, Spain
- Division of Endocrinology and Nutrition, University Clinical Hospital of Santiago de Compostela, 15706, Santiago de Compostela, Spain
| | - Silvia Cobelo-Gómez
- UETeM-Molecular Pathology Group, Department of Psychiatry, Radiology, Public Health, Nursing and Medicine (Medicine Area), Center for Research in Molecular Medicine and Chronic Diseases (CIMUS)-IDIS, University of Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - Ana I Castro
- Division of Endocrinology and Nutrition, University Clinical Hospital of Santiago de Compostela, 15706, Santiago de Compostela, Spain
- CIBER Fisiopatología de la Obesidad y la Nutrición (CIBERobn), 28029, Madrid, Spain
| | - Sofía Sánchez-Iglesias
- UETeM-Molecular Pathology Group, Department of Psychiatry, Radiology, Public Health, Nursing and Medicine (Medicine Area), Center for Research in Molecular Medicine and Chronic Diseases (CIMUS)-IDIS, University of Santiago de Compostela, 15782, Santiago de Compostela, Spain
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7
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Ravel JM, Comel M, Wandzel M, Bronner M, Tatopoulos A, Renaud M, Lambert L, Bursztejn AC, Bonnet C. First report of a short in-frame biallelic deletion removing part of the EGF-like domain calcium-binding motif in LTBP4 and causing autosomal recessive cutis laxa type 1C. Am J Med Genet A 2022; 188:3343-3349. [PMID: 35972031 DOI: 10.1002/ajmg.a.62954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 07/01/2022] [Accepted: 08/01/2022] [Indexed: 01/31/2023]
Abstract
Cutis laxa (CL) is a rare connective tissue disorder characterized by wrinkled, abundant and sagging skin, sometimes associated with systemic impairment. Biallelic alterations in latent transforming growth factor beta-binding protein 4 gene (LTBP4) cause autosomal recessive type 1C cutis laxa (ARCL1C, MIM #613177). The present report describes the case of a 17-months-old girl with cutis laxa together with a literature review of previous ARCL1C cases. Based on proband main clinical signs (cutis laxa and pulmonary emphysema), clinical exome sequencing (CES) was performed and showed a new nine base-pairs homozygous in-frame deletion in LTBP4 gene. RT-PCR and cDNA Sanger sequencing were performed in order to clarify its impact on RNA. This report demonstrates that a genetic alteration in the EGF-like 14 domain calcium-binding motif of LTBP4 gene is likely responsible for cutis laxa in our patient.
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Affiliation(s)
- Jean-Marie Ravel
- Laboratoire de génétique médicale, CHRU Nancy, Nancy, France.,Université de Lorraine, INSERM UMR_S1256, NGERE, Nancy, France
| | - Margot Comel
- Laboratoire de génétique médicale, CHRU Nancy, Nancy, France
| | - Marion Wandzel
- Laboratoire de génétique médicale, CHRU Nancy, Nancy, France
| | - Myriam Bronner
- Laboratoire de génétique médicale, CHRU Nancy, Nancy, France
| | | | - Mathilde Renaud
- Université de Lorraine, INSERM UMR_S1256, NGERE, Nancy, France.,Service de génétique médicale, CHRU de Nancy, Nancy, France
| | - Laëtitia Lambert
- Université de Lorraine, INSERM UMR_S1256, NGERE, Nancy, France.,Service de génétique médicale, CHRU de Nancy, Nancy, France
| | | | - Céline Bonnet
- Laboratoire de génétique médicale, CHRU Nancy, Nancy, France.,Université de Lorraine, INSERM UMR_S1256, NGERE, Nancy, France
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8
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Tarr I, Hesselson S, Iismaa SE, Rath E, Monger S, Troup M, Mishra K, Wong CM, Hsu PC, Junday K, Humphreys DT, Adlam D, Webb TR, Baranowska-Clarke AA, Hamby SE, Carss KJ, Samani NJ, Bax M, McGrath-Cadell L, Kovacic JC, Dunwoodie SL, Fatkin D, Muller DW, Graham RM, Giannoulatou E. Exploring the Genetic Architecture of Spontaneous Coronary Artery Dissection Using Whole-Genome Sequencing. Circ Genom Precis Med 2022; 15:e003527. [PMID: 35583931 PMCID: PMC9388555 DOI: 10.1161/circgen.121.003527] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background:
Spontaneous coronary artery dissection (SCAD) is a cause of acute coronary syndrome that predominantly affects women. Its pathophysiology remains unclear but connective tissue disorders (CTD) and other vasculopathies have been observed in many SCAD patients. A genetic component for SCAD is increasingly appreciated, although few genes have been robustly implicated. We sought to clarify the genetic cause of SCAD using targeted and genome-wide methods in a cohort of sporadic cases to identify both common and rare disease-associated variants.
Methods:
A cohort of 91 unrelated sporadic SCAD cases was investigated for rare, deleterious variants in genes associated with either SCAD or CTD, while new candidate genes were sought using rare variant collapsing analysis and identification of novel loss-of-function variants in genes intolerant to such variation. Finally, 2 SCAD polygenic risk scores were applied to assess the contribution of common variants.
Results:
We identified 10 cases with at least one rare, likely disease-causing variant in CTD-associated genes, although only one had a CTD phenotype. No genes were significantly associated with SCAD from genome-wide collapsing analysis, however, enrichment for TGF (transforming growth factor)-β signaling pathway genes was found with analysis of 24 genes harboring novel loss-of-function variants. Both polygenic risk scores demonstrated that sporadic SCAD cases have a significantly elevated genetic SCAD risk compared with controls.
Conclusions:
SCAD shares some genetic overlap with CTD, even in the absence of any major CTD phenotype. Consistent with a complex genetic architecture, SCAD patients also have a higher burden of common variants than controls.
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Affiliation(s)
- Ingrid Tarr
- Victor Chang Cardiac Research Institute, Darlinghurst, NSW, Australia (I.T., S.H., S.E.I., E.R., S.M., M.T., K.M., C.M.Y.W., P.-C.H., K.J., D.T.H., M.B., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
| | - Stephanie Hesselson
- Victor Chang Cardiac Research Institute, Darlinghurst, NSW, Australia (I.T., S.H., S.E.I., E.R., S.M., M.T., K.M., C.M.Y.W., P.-C.H., K.J., D.T.H., M.B., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
| | - Siiri E. Iismaa
- Victor Chang Cardiac Research Institute, Darlinghurst, NSW, Australia (I.T., S.H., S.E.I., E.R., S.M., M.T., K.M., C.M.Y.W., P.-C.H., K.J., D.T.H., M.B., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
- UNSW Sydney, Kensington, NSW, Australia (S.E.I., E.R., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
| | - Emma Rath
- Victor Chang Cardiac Research Institute, Darlinghurst, NSW, Australia (I.T., S.H., S.E.I., E.R., S.M., M.T., K.M., C.M.Y.W., P.-C.H., K.J., D.T.H., M.B., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
- UNSW Sydney, Kensington, NSW, Australia (S.E.I., E.R., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
| | - Steven Monger
- Victor Chang Cardiac Research Institute, Darlinghurst, NSW, Australia (I.T., S.H., S.E.I., E.R., S.M., M.T., K.M., C.M.Y.W., P.-C.H., K.J., D.T.H., M.B., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
| | - Michael Troup
- Victor Chang Cardiac Research Institute, Darlinghurst, NSW, Australia (I.T., S.H., S.E.I., E.R., S.M., M.T., K.M., C.M.Y.W., P.-C.H., K.J., D.T.H., M.B., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
| | - Ketan Mishra
- Victor Chang Cardiac Research Institute, Darlinghurst, NSW, Australia (I.T., S.H., S.E.I., E.R., S.M., M.T., K.M., C.M.Y.W., P.-C.H., K.J., D.T.H., M.B., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
| | - Claire M.Y. Wong
- Victor Chang Cardiac Research Institute, Darlinghurst, NSW, Australia (I.T., S.H., S.E.I., E.R., S.M., M.T., K.M., C.M.Y.W., P.-C.H., K.J., D.T.H., M.B., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
| | - Pei-Chen Hsu
- Victor Chang Cardiac Research Institute, Darlinghurst, NSW, Australia (I.T., S.H., S.E.I., E.R., S.M., M.T., K.M., C.M.Y.W., P.-C.H., K.J., D.T.H., M.B., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
| | - Keerat Junday
- Victor Chang Cardiac Research Institute, Darlinghurst, NSW, Australia (I.T., S.H., S.E.I., E.R., S.M., M.T., K.M., C.M.Y.W., P.-C.H., K.J., D.T.H., M.B., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
| | - David T. Humphreys
- Victor Chang Cardiac Research Institute, Darlinghurst, NSW, Australia (I.T., S.H., S.E.I., E.R., S.M., M.T., K.M., C.M.Y.W., P.-C.H., K.J., D.T.H., M.B., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
| | - David Adlam
- Department of Cardiovascular Sciences, NIHR Leicester Biomedical Research Centre, University of Leicester, United Kingdom (D.A., T.R.W., A.A.B.-C., S.E.H., N.J.S.)
| | - Tom R. Webb
- Department of Cardiovascular Sciences, NIHR Leicester Biomedical Research Centre, University of Leicester, United Kingdom (D.A., T.R.W., A.A.B.-C., S.E.H., N.J.S.)
| | - Anna A. Baranowska-Clarke
- UNSW Sydney, Kensington, NSW, Australia (S.E.I., E.R., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
| | - Stephen E. Hamby
- Department of Cardiovascular Sciences, NIHR Leicester Biomedical Research Centre, University of Leicester, United Kingdom (D.A., T.R.W., A.A.B.-C., S.E.H., N.J.S.)
| | - Keren J. Carss
- Centre for Genomics Research, Discovery Sciences, BioPharmaceuticals R&D, AstraZeneca, United Kingdom (K.J.C.)
| | - Nilesh J. Samani
- Department of Cardiovascular Sciences, NIHR Leicester Biomedical Research Centre, University of Leicester, United Kingdom (D.A., T.R.W., A.A.B.-C., S.E.H., N.J.S.)
| | - Monique Bax
- Victor Chang Cardiac Research Institute, Darlinghurst, NSW, Australia (I.T., S.H., S.E.I., E.R., S.M., M.T., K.M., C.M.Y.W., P.-C.H., K.J., D.T.H., M.B., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
| | - Lucy McGrath-Cadell
- Victor Chang Cardiac Research Institute, Darlinghurst, NSW, Australia (I.T., S.H., S.E.I., E.R., S.M., M.T., K.M., C.M.Y.W., P.-C.H., K.J., D.T.H., M.B., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
- UNSW Sydney, Kensington, NSW, Australia (S.E.I., E.R., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
| | - Jason C. Kovacic
- Victor Chang Cardiac Research Institute, Darlinghurst, NSW, Australia (I.T., S.H., S.E.I., E.R., S.M., M.T., K.M., C.M.Y.W., P.-C.H., K.J., D.T.H., M.B., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
- UNSW Sydney, Kensington, NSW, Australia (S.E.I., E.R., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
- Cardiovascular Research Institute, Icahn School of Medicine at Mount Sinai, New York, NY (J.C.K.)
- Cardiology Department, St Vincent’s Hospital, Darlinghurst, NSW, Australia (J.C.K., D.F., D.W.M.M., R.M.G.)
| | - Sally L. Dunwoodie
- Victor Chang Cardiac Research Institute, Darlinghurst, NSW, Australia (I.T., S.H., S.E.I., E.R., S.M., M.T., K.M., C.M.Y.W., P.-C.H., K.J., D.T.H., M.B., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
- UNSW Sydney, Kensington, NSW, Australia (S.E.I., E.R., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
| | - Diane Fatkin
- Victor Chang Cardiac Research Institute, Darlinghurst, NSW, Australia (I.T., S.H., S.E.I., E.R., S.M., M.T., K.M., C.M.Y.W., P.-C.H., K.J., D.T.H., M.B., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
- UNSW Sydney, Kensington, NSW, Australia (S.E.I., E.R., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
- Cardiology Department, St Vincent’s Hospital, Darlinghurst, NSW, Australia (J.C.K., D.F., D.W.M.M., R.M.G.)
| | - David W.M. Muller
- Victor Chang Cardiac Research Institute, Darlinghurst, NSW, Australia (I.T., S.H., S.E.I., E.R., S.M., M.T., K.M., C.M.Y.W., P.-C.H., K.J., D.T.H., M.B., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
- UNSW Sydney, Kensington, NSW, Australia (S.E.I., E.R., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
- Cardiology Department, St Vincent’s Hospital, Darlinghurst, NSW, Australia (J.C.K., D.F., D.W.M.M., R.M.G.)
| | - Robert M. Graham
- Victor Chang Cardiac Research Institute, Darlinghurst, NSW, Australia (I.T., S.H., S.E.I., E.R., S.M., M.T., K.M., C.M.Y.W., P.-C.H., K.J., D.T.H., M.B., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
- UNSW Sydney, Kensington, NSW, Australia (S.E.I., E.R., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
- Cardiology Department, St Vincent’s Hospital, Darlinghurst, NSW, Australia (J.C.K., D.F., D.W.M.M., R.M.G.)
| | - Eleni Giannoulatou
- Victor Chang Cardiac Research Institute, Darlinghurst, NSW, Australia (I.T., S.H., S.E.I., E.R., S.M., M.T., K.M., C.M.Y.W., P.-C.H., K.J., D.T.H., M.B., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
- UNSW Sydney, Kensington, NSW, Australia (S.E.I., E.R., L.M.-C., J.C.K., S.L.D., D.F., D.W.M.M., R.M.G., E.G.)
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9
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Lugli L, Cavalleri F, Bertucci E, Fischer-Zirnsak B, Cinelli G, Trevisani V, Rossi C, Riva M, Iughetti L, Berardi A. Autosomal recessive cutis laxa type IIIA: Report of a patient with severe phenotype and review of the literature. Eur J Med Genet 2022; 65:104568. [PMID: 35842092 DOI: 10.1016/j.ejmg.2022.104568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Revised: 05/24/2022] [Accepted: 07/10/2022] [Indexed: 11/03/2022]
Abstract
Autosomal recessive cutis laxa type IIIA is a very rare genetic condition, caused by pathogenic variants in ALDH18A1, encoding delta-1-pyrroline-5-carboxylate synthase (P5CS). This enzyme catalyzes the reduction of glutamic acid to delta1-pyrroline-5-carboxylate, playing a key role in the de novo biosynthesis of proline, ornithine, and arginine. Autosomal recessive cutis laxa type IIIA is characterized by abundant and wrinkled skin, skeletal anomalies, cataract or corneal clouding and neuro-developmental disorders of variable degree. We report on a patient with autosomal recessive cutis laxa type IIIA, due to a homozygous missense c.1273C > T; p. (Arg425Cys) pathogenic variant in ALDH18A1. The patient presented a severe phenotype with serious urological involvement, peculiar cerebro-vascular abnormalities and neurodevelopmental compromise. This description contributes to better characterize the phenotypic spectrum associated with ALDH18A1 pathogenic variants, confirming the systemic involvement as a typical feature of autosomal recessive cutis laxa type IIIA.
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Affiliation(s)
- Licia Lugli
- Neonatology Unit, Mother-Child Department, University Hospital of Modena, Italy.
| | | | - Emma Bertucci
- Obstetric-Gynecology Unit, Mother-Child Department, University Hospital of Modena, Italy
| | - Björn Fischer-Zirnsak
- Institute of Medical Genetics and Human Genetics, Charité- Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt Universität zu Berlin, And Berlin Institute of Health, Berlin, Germany
| | - Giulia Cinelli
- Postgraduate School of Pediatrics, Department of Medical and Surgical Sciences for Mother, Children and Adults, University of Modena and Reggio Emilia, Italy
| | - Viola Trevisani
- Postgraduate School of Pediatrics, Department of Medical and Surgical Sciences for Mother, Children and Adults, University of Modena and Reggio Emilia, Italy
| | - Cecilia Rossi
- Neonatology Unit, Mother-Child Department, University Hospital of Modena, Italy
| | - Marika Riva
- Pediatric Unit, Mother-Child Department, University Hospital of Modena, Italy
| | - Lorenzo Iughetti
- Postgraduate School of Pediatrics, Department of Medical and Surgical Sciences for Mother, Children and Adults, University of Modena and Reggio Emilia, Italy; Pediatric Unit, Mother-Child Department, University Hospital of Modena, Italy
| | - Alberto Berardi
- Neonatology Unit, Mother-Child Department, University Hospital of Modena, Italy
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10
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Pickwick C, Callewaert B, van Dijk F, Harris J, Wakeling E, Hay E, Yeo M, Chakrapani A, Baptista J, Moore S, Yoong M, Chatterjee F, Ghali N. Expanding the phenotypic spectrum of ALDH18A1-related autosomal recessive cutis laxa with a description of novel neuroradiological findings. Clin Dysmorphol 2022; 31:66-70. [PMID: 34954732 DOI: 10.1097/mcd.0000000000000404] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
| | - Bert Callewaert
- Department of Biomolecular Medicine, Center for Medical Genetics, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - Fleur van Dijk
- Ehlers-Danlos Syndrome National Diagnostic Service, North West London Hospitals NHS Trust, Harrow, Middlesex
| | - Juliette Harris
- Ehlers-Danlos Syndrome National Diagnostic Service, North West London Hospitals NHS Trust, Harrow, Middlesex
| | | | | | - Mildrid Yeo
- Department of Paediatric Metabolic Medicine, Great Ormond Street Hospital, Great Ormond Street, London
| | - Anupam Chakrapani
- Department of Paediatric Metabolic Medicine, Great Ormond Street Hospital, Great Ormond Street, London
| | - Julia Baptista
- Exeter Genomics Laboratory, Royal Devon & Exeter NHS Foundation Trust
- Institute of Biomedical and Clinical Science, University of Exeter Medical School, Exeter, Departments of
| | - Sandra Moore
- Exeter Genomics Laboratory, Royal Devon & Exeter NHS Foundation Trust
| | | | - Fiona Chatterjee
- Paediatric Neuroradiology, Barts Health NHS Trust, The Royal Hospital, Whitechapel Road, London, UK
| | - Neeti Ghali
- Ehlers-Danlos Syndrome National Diagnostic Service, North West London Hospitals NHS Trust, Harrow, Middlesex
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11
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Zhong J, Guo CJ, Zhou X, Chang CC, Yin B, Zhang T, Hu H, Lu GM, Liu JL. Structural basis of dynamic P5CS filaments. eLife 2022; 11:76107. [PMID: 35286254 PMCID: PMC8963878 DOI: 10.7554/elife.76107] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Accepted: 03/13/2022] [Indexed: 11/13/2022] Open
Abstract
The bifunctional enzyme Δ1-pyrroline-5-carboxylate synthase (P5CS) is vital to the synthesis of proline and ornithine, playing an essential role in human health and agriculture. Pathogenic mutations in the P5CS gene (ALDH18A1) lead to neurocutaneous syndrome and skin relaxation connective tissue disease in humans, and P5CS deficiency seriously damages the ability to resist adversity in plants. We have recently found that P5CS forms cytoophidia in vivo and filaments in vitro. However, it is difficult to appreciate the function of P5CS filamentation without precise structures. Using cryo-electron microscopy, here we solve the structures of Drosophila full-length P5CS in three states at resolution from 3.1 to 4.3 Å. We observe distinct ligand-binding states and conformational changes for the GK and GPR domains, respectively. Divergent helical filaments are assembled by P5CS tetramers and stabilized by multiple interfaces. Point mutations disturbing those interfaces prevent P5CS filamentation and greatly reduce the enzymatic activity. Our findings reveal that filamentation is crucial for the coordination between the GK and GPR domains, providing a structural basis for the catalytic function of P5CS filaments.
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Affiliation(s)
- Jiale Zhong
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China
| | - Chen-Jun Guo
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China
| | - Xian Zhou
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China
| | - Chia-Chun Chang
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China
| | - Boqi Yin
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China
| | - Tianyi Zhang
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China
| | - Huanhuan Hu
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China
| | - Guang-Ming Lu
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China
| | - Ji-Long Liu
- School of Life Science and Technology, ShanghaiTech University, Shanghai, China
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12
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Beyens A, Pottie L, Sips P, Callewaert B. Clinical and Molecular Delineation of Cutis Laxa Syndromes: Paradigms for Homeostasis. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1348:273-309. [PMID: 34807425 DOI: 10.1007/978-3-030-80614-9_13] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Cutis laxa (CL) syndromes are a large and heterogeneous group of rare connective tissue disorders that share loose redundant skin as a hallmark clinical feature, which reflects dermal elastic fiber fragmentation. Both acquired and congenital-Mendelian- forms exist. Acquired forms are progressive and often preceded by inflammatory triggers in the skin, but may show systemic elastolysis. Mendelian forms are often pleiotropic in nature and classified upon systemic manifestations and mode of inheritance. Though impaired elastogenesis is a common denominator in all Mendelian forms of CL, the underlying gene defects are diverse and affect structural components of the elastic fiber or impair metabolic pathways interfering with cellular trafficking, proline synthesis, or mitochondrial functioning. In this chapter we provide a detailed overview of the clinical and molecular characteristics of the different cutis laxa types and review the latest insights on elastic fiber assembly and homeostasis from both human and animal studies.
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Affiliation(s)
- Aude Beyens
- Center for Medical Genetics Ghent, Department of Dermatology, Department of Biomolecular Medicine, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - Lore Pottie
- Center for Medical Genetics Ghent, Ghent University Hospital, Ghent, Belgium.,Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
| | - Patrick Sips
- Center for Medical Genetics Ghent, Ghent University Hospital, Ghent, Belgium.,Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
| | - Bert Callewaert
- Center for Medical Genetics Ghent, Department of Biomolecular Medicine, Ghent University Hospital, Ghent University, Ghent, Belgium.
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13
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Patriarca EJ, Cermola F, D’Aniello C, Fico A, Guardiola O, De Cesare D, Minchiotti G. The Multifaceted Roles of Proline in Cell Behavior. Front Cell Dev Biol 2021; 9:728576. [PMID: 34458276 PMCID: PMC8397452 DOI: 10.3389/fcell.2021.728576] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 07/23/2021] [Indexed: 12/13/2022] Open
Abstract
Herein, we review the multifaceted roles of proline in cell biology. This peculiar cyclic imino acid is: (i) A main precursor of extracellular collagens (the most abundant human proteins), antimicrobial peptides (involved in innate immunity), salivary proteins (astringency, teeth health) and cornifins (skin permeability); (ii) an energy source for pathogenic bacteria, protozoan parasites, and metastatic cancer cells, which engage in extracellular-protein degradation to invade their host; (iii) an antistress molecule (an osmolyte and chemical chaperone) helpful against various potential harms (UV radiation, drought/salinity, heavy metals, reactive oxygen species); (iv) a neural metabotoxin associated with schizophrenia; (v) a modulator of cell signaling pathways such as the amino acid stress response and extracellular signal-related kinase pathway; (vi) an epigenetic modifier able to promote DNA and histone hypermethylation; (vii) an inducer of proliferation of stem and tumor cells; and (viii) a modulator of cell morphology and migration/invasiveness. We highlight how proline metabolism impacts beneficial tissue regeneration, but also contributes to the progression of devastating pathologies such as fibrosis and metastatic cancer.
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Affiliation(s)
| | | | | | | | | | | | - Gabriella Minchiotti
- Stem Cell Fate Laboratory, Institute of Genetics and Biophysics “A. Buzzati Traverso”, Consiglio Nazionale delle Ricerche, Naples, Italy
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14
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Vogt G, El Choubassi N, Herczegfalvi Á, Kölbel H, Lekaj A, Schara U, Holtgrewe M, Krause S, Horvath R, Schuelke M, Hübner C, Mundlos S, Roos A, Lochmüller H, Karcagi V, Kornak U, Fischer‐Zirnsak B. Expanding the clinical and molecular spectrum of ATP6V1A related metabolic cutis laxa. J Inherit Metab Dis 2021; 44:972-986. [PMID: 33320377 PMCID: PMC8638669 DOI: 10.1002/jimd.12341] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 12/08/2020] [Accepted: 12/14/2020] [Indexed: 12/14/2022]
Abstract
Several inborn errors of metabolism show cutis laxa as a highly recognizable feature. One group of these metabolic cutis laxa conditions is autosomal recessive cutis laxa type 2 caused by defects in v-ATPase components or the mitochondrial proline cycle. Besides cutis laxa, muscular hypotonia and cardiac abnormalities are hallmarks of autosomal recessive cutis laxa type 2D (ARCL2D) due to pathogenic variants in ATP6V1A encoding subunit A of the v-ATPase. Here, we report on three affected individuals from two families with ARCL2D in whom we performed whole exome and Sanger sequencing. We performed functional studies in fibroblasts from one individual, summarized all known probands' clinical, molecular, and biochemical features and compared them, also to other metabolic forms of cutis laxa. We identified novel missense and the first nonsense variant strongly affecting ATP6V1A expression. All six ARCL2D affected individuals show equally severe cutis laxa and dysmorphism at birth. While for one no information was available, two died in infancy and three are now adolescents with mild or absent intellectual disability. Muscular weakness, ptosis, contractures, and elevated muscle enzymes indicated a persistent myopathy. In cellular studies, a fragmented Golgi compartment, a delayed Brefeldin A-induced retrograde transport and glycosylation abnormalities were present in fibroblasts from two individuals. This is the second and confirmatory report on pathogenic variants in ATP6V1A as the cause of this extremely rare condition and the first to describe a nonsense allele. Our data highlight the tremendous clinical variability of ATP6V1A related phenotypes even within the same family.
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Affiliation(s)
- Guido Vogt
- Institut für Medizinische Genetik und Humangenetik, Charité ‐ Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt Universität zu Berlin, and Berlin Institute of HealthBerlinGermany
- Max Planck Institute for Molecular Genetics, RG Development & DiseaseBerlinGermany
| | - Naji El Choubassi
- Institut für Medizinische Genetik und Humangenetik, Charité ‐ Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt Universität zu Berlin, and Berlin Institute of HealthBerlinGermany
- Max Planck Institute for Molecular Genetics, RG Development & DiseaseBerlinGermany
| | - Ágnes Herczegfalvi
- Department of Pediatric NeurologySemmelweis Medical University, II. Pediatric ClinicBudapestHungary
| | - Heike Kölbel
- Department of Pediatric NeurologyUniversity Hospital Essen, University Duisburg‐EssenEssenGermany
| | - Anja Lekaj
- Institut für Medizinische Genetik und Humangenetik, Charité ‐ Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt Universität zu Berlin, and Berlin Institute of HealthBerlinGermany
| | - Ulrike Schara
- Department of Pediatric NeurologyUniversity Hospital Essen, University Duisburg‐EssenEssenGermany
| | - Manuel Holtgrewe
- CUBI – Core Unit BioinformaticsBerlin Institute of HealthBerlinGermany
| | - Sabine Krause
- Friedrich‐Baur‐Institute, Department of NeurologyLudwig‐Maximilians‐University of MunichMunichGermany
| | - Rita Horvath
- Department of Clinical NeurosciencesUniversity of Cambridge, Cambridge Biomedical CampusCambridgeUK
| | - Markus Schuelke
- Department of Neuropediatrics, Charité‐Universitätsmedizin Berlincorporate member of Freie Universität Berlin, Humboldt‐Universität zu Berlin, and Berlin Institute of HealthBerlinGermany
| | - Christoph Hübner
- Department of Neuropediatrics, Charité‐Universitätsmedizin Berlincorporate member of Freie Universität Berlin, Humboldt‐Universität zu Berlin, and Berlin Institute of HealthBerlinGermany
| | - Stefan Mundlos
- Institut für Medizinische Genetik und Humangenetik, Charité ‐ Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt Universität zu Berlin, and Berlin Institute of HealthBerlinGermany
- Max Planck Institute for Molecular Genetics, RG Development & DiseaseBerlinGermany
| | - Andreas Roos
- Department of Pediatric NeurologyUniversity Hospital Essen, University Duisburg‐EssenEssenGermany
- Children's Hospital of Eastern Ontario Research InstituteUniversity of OttawaOttawaOntarioCanada
| | - Hanns Lochmüller
- Children's Hospital of Eastern Ontario Research InstituteUniversity of OttawaOttawaOntarioCanada
- Division of Neurology, Department of Medicine, The Ottawa HospitalOttawaCanada
- Brain and Mind Research InstituteUniversity of OttawaOttawaCanada
| | - Veronika Karcagi
- NIEH, Department of Molecular Genetics and DiagnosticsBudapestHungary
- Istenhegyi Genetic Diagnostic CentreBudapestHungary
| | - Uwe Kornak
- Institut für Medizinische Genetik und Humangenetik, Charité ‐ Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt Universität zu Berlin, and Berlin Institute of HealthBerlinGermany
- Max Planck Institute for Molecular Genetics, RG Development & DiseaseBerlinGermany
- Institute of Human GeneticsUniversity Medical Center GöttingenGöttingenGermany
| | - Björn Fischer‐Zirnsak
- Institut für Medizinische Genetik und Humangenetik, Charité ‐ Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt Universität zu Berlin, and Berlin Institute of HealthBerlinGermany
- Max Planck Institute for Molecular Genetics, RG Development & DiseaseBerlinGermany
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15
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Xu Y, Zuo W, Wang X, Zhang Q, Gan X, Tan N, Jia W, Liu J, Li Z, Zhou B, Zhao D, Xie Z, Tan Y, Zheng S, Liu C, Li H, Chen Z, Yang X, Huang Z. Deciphering the effects of PYCR1 on cell function and its associated mechanism in hepatocellular carcinoma. Int J Biol Sci 2021; 17:2223-2239. [PMID: 34239351 PMCID: PMC8241733 DOI: 10.7150/ijbs.58026] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Accepted: 05/16/2021] [Indexed: 12/28/2022] Open
Abstract
Overexpression of pyrroline-5-carboxylate reductase 1 (PYCR1) has been associated with the development of certain cancers; however, no studies have specifically examined the role of PYCR1 in hepatocellular carcinoma (HCC). Based on The Cancer Genome Atlas expression array and meta-analysis conducted using the Gene Expression Omnibus database, we determined that PYCR1 was upregulated in HCC compared to adjacent nontumor tissues (P < 0.05). These data were verified using quantitative real-time polymerase chain reaction, western blotting, and immunohistochemistry analysis. Additionally, patients with low PYCR1 expression showed a higher overall survival rate than patients with high PYCR1 expression. Furthermore, PYCR1 overexpression was associated with the female sex, higher levels of alpha-fetoprotein, advanced clinical stages (III and IV), and a younger age (< 45 years old). Silencing of PYCR1 inhibited cell proliferation, invasive migration, epithelial-mesenchymal transition, and metastatic properties in HCC in vitro and in vivo. Using RNA sequencing and bioinformatics tools for data-dependent network analysis, we found binary relationships among PYCR1 and its interacting proteins in defined pathway modules. These findings indicated that PYCR1 played a multifunctional role in coordinating a variety of biological pathways involved in cell communication, cell proliferation and growth, cell migration, a mitogen-activated protein kinase cascade, ion binding, etc. The structural characteristics of key pathway components and PYCR1-interacting proteins were evaluated by molecular docking, and hotspot analysis showed that better affinities between PYCR1 and its interacting molecules were associated with the presence of arginine in the binding site. Finally, a candidate regulatory microRNA, miR-2355-5p, for PYCR1 mRNA was discovered in HCC. Overall, our study suggests that PYCR1 plays a vital role in HCC pathogenesis and may potentially serve as a molecular target for HCC treatment.
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Affiliation(s)
- Yanzhen Xu
- Department of pathology, Affiliated hospital of Guilin Medical University, Guilin, 541001, Guangxi, China
- Scientific Research Center, Guilin Medical University, Guilin, 541001, Guangxi, China
- Department of Pathology, Affiliated Hangzhou First People's Hospital, School of Medicine, Zhejiang University, 310000, Hangzhou, China
| | - Wenpu Zuo
- Scientific Research Center, Guilin Medical University, Guilin, 541001, Guangxi, China
- Medical Scientific Research Center, Guangxi Medical University, Nanning, 530000, Guangxi, China
| | - Xiao Wang
- Scientific Research Center, Guilin Medical University, Guilin, 541001, Guangxi, China
- Guangxi Health Commission Key Laboratory of Disease Proteomics Research, Guilin Medical University, Guilin, 541001, Guangxi, China
| | - Qinle Zhang
- Genetic and metabolic central laboratory, the maternal and children's health hospital of Guangxi, Nanning, 530000, Guangxi, China
| | - Xiang Gan
- Scientific Research Center, Guilin Medical University, Guilin, 541001, Guangxi, China
- Guangxi Health Commission Key Laboratory of Disease Proteomics Research, Guilin Medical University, Guilin, 541001, Guangxi, China
| | - Ning Tan
- Scientific Research Center, Guilin Medical University, Guilin, 541001, Guangxi, China
| | - Wenxian Jia
- Scientific Research Center, Guilin Medical University, Guilin, 541001, Guangxi, China
- Guangxi Health Commission Key Laboratory of Disease Proteomics Research, Guilin Medical University, Guilin, 541001, Guangxi, China
| | - Jiayi Liu
- Scientific Research Center, Guilin Medical University, Guilin, 541001, Guangxi, China
| | - Zhouquan Li
- Scientific Research Center, Guilin Medical University, Guilin, 541001, Guangxi, China
- Guangxi Health Commission Key Laboratory of Disease Proteomics Research, Guilin Medical University, Guilin, 541001, Guangxi, China
| | - Bo Zhou
- Scientific Research Center, Guilin Medical University, Guilin, 541001, Guangxi, China
- Guangxi Health Commission Key Laboratory of Disease Proteomics Research, Guilin Medical University, Guilin, 541001, Guangxi, China
| | - Dong Zhao
- Scientific Research Center, Guilin Medical University, Guilin, 541001, Guangxi, China
| | - Zhibin Xie
- Department of Urology, the Five Affiliated Hospital of Guangxi Medical University, Nanning, 530000, Guangxi, China
| | - Yanjun Tan
- Scientific Research Center, Guilin Medical University, Guilin, 541001, Guangxi, China
- Guangxi Health Commission Key Laboratory of Disease Proteomics Research, Guilin Medical University, Guilin, 541001, Guangxi, China
| | - Shengfeng Zheng
- Scientific Research Center, Guilin Medical University, Guilin, 541001, Guangxi, China
| | - Chengwu Liu
- Department of Pathophysiology, Guangxi Medical University, Nanning, 530000, Guangxi, China
| | - Hongtao Li
- Scientific Research Center, Guilin Medical University, Guilin, 541001, Guangxi, China
- Guangxi Health Commission Key Laboratory of Disease Proteomics Research, Guilin Medical University, Guilin, 541001, Guangxi, China
| | - Zhijian Chen
- Department of Clinical Laboratory, the First Affiliated Hospital of Guangxi Medical University, Nanning, 530000, Guangxi, China
| | - Xiaoli Yang
- Scientific Research Center, Guilin Medical University, Guilin, 541001, Guangxi, China
- Guangxi Health Commission Key Laboratory of Disease Proteomics Research, Guilin Medical University, Guilin, 541001, Guangxi, China
| | - Zhaoquan Huang
- Department of pathology, Affiliated hospital of Guilin Medical University, Guilin, 541001, Guangxi, China
- Department of Pathology, the First Affiliated Hospital of Guangxi Medical University, Nanning, 530000, Guangxi, China
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16
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Chen YJ, Zhang ZQ, Wang MW, Qiu YS, Yuan RY, Dong EL, Zhao Z, Zhou HT, Wang N, Chen WJ, Lin X. Novel Compound Missense and Intronic Splicing Mutation in ALDH18A1 Causes Autosomal Recessive Spastic Paraplegia. Front Neurol 2021; 12:627531. [PMID: 34093392 PMCID: PMC8170465 DOI: 10.3389/fneur.2021.627531] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 04/07/2021] [Indexed: 12/14/2022] Open
Abstract
Background: Hereditary spastic paraplegia (HSP) caused by mutations in ALDH18A1 have been reported as spastic paraplegia 9 (SPG9), with autosomal dominant and autosomal recessive transmission (SPG9A and SPG9B). SPG9 is rare and has shown phenotypic and genotypic heterogeneity in previous reports. Methods: This study screened ALDH18A1 mutations in autosomal recessive HSP patients using combined whole exome sequencing and RNA splicing analysis. We conducted in silico investigations, co-segregation analysis, and ELISA-based analysis of P5CS (Δ1-pyrroline-5-carboxylate synthetase; encoded by ALDH18A1) concentration to validate the pathogenicity of the detected ALDH18A1 variants. All previously reported bi-allelic ALDH18A1 mutations and cases were reviewed to summarize the genetic and clinical features of ALDH18A1-related HSP. Results: A novel missense mutation c.880T>C, p.S294P and an intronic splicing mutation c.-28-13A>G were both detected in ALDH18A1 in an autosomal recessive family presenting with a complicated form HSP. ELISA assays revealed significantly decreased P5CS concentration in the proband's plasma compared with that in the healthy controls. Moreover, review of previously reported recessive cases showed that SPG9B patients in our cohort presented with milder symptoms, i.e., later age at onset and without cognitive impairment. Conclusion: The present study expands the genetic and clinical spectrum of SPG9B caused by ALDH18A1 mutation. Our work defines new genetic variants to facilitate future diagnoses, in addition to demonstrating the highly informative value of splicing mutation prediction in the characterization of disease-related intronic variants.
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Affiliation(s)
- Yi-Jun Chen
- Department of Neurology and Institute of Neurology, The First Affiliated Hospital of Fujian Medical University, Fuzhou, China
| | - Zai-Qiang Zhang
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Meng-Wen Wang
- Department of Neurology and Institute of Neurology, The First Affiliated Hospital of Fujian Medical University, Fuzhou, China
| | - Yu-Sen Qiu
- Department of Neurology and Institute of Neurology, The First Affiliated Hospital of Fujian Medical University, Fuzhou, China
| | - Ru-Ying Yuan
- Department of Neurology and Institute of Neurology, The First Affiliated Hospital of Fujian Medical University, Fuzhou, China
| | - En-Lin Dong
- Department of Neurology and Institute of Neurology, The First Affiliated Hospital of Fujian Medical University, Fuzhou, China
| | - Zhe Zhao
- Department of Neuromuscular Disorders, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Hai-Tao Zhou
- Department of Neurology, Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, China
| | - Ning Wang
- Department of Neurology and Institute of Neurology, The First Affiliated Hospital of Fujian Medical University, Fuzhou, China.,Fujian Key Laboratory of Molecular Neurology, Fujian Medical University, Fuzhou, China
| | - Wan-Jin Chen
- Department of Neurology and Institute of Neurology, The First Affiliated Hospital of Fujian Medical University, Fuzhou, China.,Fujian Key Laboratory of Molecular Neurology, Fujian Medical University, Fuzhou, China
| | - Xiang Lin
- Department of Neurology and Institute of Neurology, The First Affiliated Hospital of Fujian Medical University, Fuzhou, China.,Fujian Key Laboratory of Molecular Neurology, Fujian Medical University, Fuzhou, China
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17
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Boel A, Veszelyi K, Németh CE, Beyens A, Willaert A, Coucke P, Callewaert B, Margittai É. Arterial Tortuosity Syndrome: An Ascorbate Compartmentalization Disorder? Antioxid Redox Signal 2021; 34:875-889. [PMID: 31621376 DOI: 10.1089/ars.2019.7843] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Significance: Cardiovascular disorders are the most important cause of morbidity and mortality in the Western world. Monogenic developmental disorders of the heart and vessels are highly valuable to study the physiological and pathological processes in cardiovascular system homeostasis. The arterial tortuosity syndrome (ATS) is a rare, autosomal recessive connective tissue disorder showing lengthening, tortuosity, and stenosis of the large arteries, with a propensity for aneurysm formation. In histopathology, it associates with fragmentation and disorganization of elastic fibers in several tissues, including the arterial wall. ATS is caused by pathogenic variants in SLC2A10 encoding the facilitative glucose transporter (GLUT)10. Critical Issues: Although several hypotheses have been forwarded, the molecular mechanisms linking disrupted GLUT10 activity with arterial malformations are largely unknown. Recent Advances: The vascular and systemic manifestations and natural history of ATS patients have been largely delineated. GLUT10 was identified as an intracellular transporter of dehydroascorbic acid, which contributes to collagen and elastin cross-linking in the endoplasmic reticulum, redox homeostasis in the mitochondria, and global and gene-specific methylation/hydroxymethylation affecting epigenetic regulation in the nucleus. We revise here the current knowledge on ATS and the role of GLUT10 within the compartmentalization of ascorbate in physiological and diseased states. Future Directions: Centralization of clinical, treatment, and outcome data will enable better management for ATS patients. Establishment of representative animal disease models could facilitate the study of pathomechanisms underlying ATS. This might be relevant for other forms of vascular dysplasia, such as isolated aneurysm formation, hypertensive vasculopathy, and neovascularization. Antioxid. Redox Signal. 34, 875-889.
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Affiliation(s)
- Annekatrien Boel
- Department of Biomolecular Medicine, Center for Medical Genetics Ghent, Ghent University, Ghent, Belgium
| | - Krisztina Veszelyi
- Institute of Clinical Experimental Research, Molecular Biology, and Pathobiochemistry, Semmelweis University, Budapest, Hungary
| | - Csilla E Németh
- Department of Medical Chemistry, Molecular Biology, and Pathobiochemistry, Semmelweis University, Budapest, Hungary
| | - Aude Beyens
- Department of Biomolecular Medicine, Center for Medical Genetics Ghent, Ghent University, Ghent, Belgium
| | - Andy Willaert
- Department of Biomolecular Medicine, Center for Medical Genetics Ghent, Ghent University, Ghent, Belgium
| | - Paul Coucke
- Department of Biomolecular Medicine, Center for Medical Genetics Ghent, Ghent University, Ghent, Belgium
| | - Bert Callewaert
- Department of Biomolecular Medicine, Center for Medical Genetics Ghent, Ghent University, Ghent, Belgium
| | - Éva Margittai
- Institute of Clinical Experimental Research, Molecular Biology, and Pathobiochemistry, Semmelweis University, Budapest, Hungary
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18
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Heinz A. Elastic fibers during aging and disease. Ageing Res Rev 2021; 66:101255. [PMID: 33434682 DOI: 10.1016/j.arr.2021.101255] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 11/29/2020] [Accepted: 12/30/2020] [Indexed: 02/08/2023]
Abstract
Elastic fibers are essential constituents of the extracellular matrix of higher vertebrates and endow several tissues and organs including lungs, skin and blood vessels with elasticity and resilience. During the human lifespan, elastic fibers are exposed to a variety of enzymatic, chemical and biophysical influences, and accumulate damage due to their low turnover. Aging of elastin and elastic fibers involves enzymatic degradation, oxidative damage, glycation, calcification, aspartic acid racemization, binding of lipids and lipid peroxidation products, carbamylation and mechanical fatigue. These processes can trigger an impairment or loss of elastic fiber function and are associated with severe pathologies. There are different inherited or acquired pathological conditions, which influence the structure and function of elastic fibers and microfibrils predominantly in the cardiorespiratory system and skin. Inherited elastic-fiber pathologies have a direct or indirect impact on elastic-fiber formation due to mutations in the fibrillin genes (fibrillinopathies), in the elastin gene (elastinopathies) or in genes encoding proteins that are associated with microfibrils or elastic fibers. Acquired elastic-fiber pathologies appear age-related or as a result of multiple factors impairing tissue homeostasis. This review gives an overview on the fate of elastic fibers over the human lifespan in health and disease.
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19
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Koh K, Takaki R, Ishiura H, Tsuji S, Takiyama Y. SPG9A with the new occurrence of an ALDH18A1 mutation in a CMT1A family with PMP22 duplication: case report. BMC Neurol 2021; 21:64. [PMID: 33573605 PMCID: PMC7876803 DOI: 10.1186/s12883-021-02087-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 02/02/2021] [Indexed: 12/03/2022] Open
Abstract
Background ALDH18A1 mutations lead to delta-1-pyrroline-5-carboxylate-synthetase (P5CS) deficiency, which is a urea cycle-related disorder including SPG9A, SPG9B, autosomal dominant cutis laxa-3 (ADCL3), and autosomal recessive cutis laxa type 3A (ARCL3A). These diseases exhibit a broad clinical spectrum, which makes the diagnosis of P5CS deficiency difficult. We report here a rare Japanese family including both patients with an ALDH18A1 mutation (SPG9A) and ones with CMT1A. Case presentation A Japanese family included five patients with the CMT phenotype and five with the HSP phenotype in four generations. The patients with the HSP phenotype showed a pure or complicated form, and intrafamilial clinical variability was noted. Genetically, FISH analysis revealed that two CMT patients had a PMP22 duplication (CMT1A). Exome analysis and Sanger sequencing revealed five HSP patients had an ALDH18A1 heterozygous mutation of c.755G > A, which led to SPG9A. Haplotype analysis revealed that the ALDH18A1 mutation must have newly occurred. To date, although de novo mutations of ALDH18A1 have been described in ADCL3A, they were not mentioned in SPG9A in earlier reports. Thus, this is the first SPG9A family with a de novo mutation or the new occurrence of gonadal mosaicism of ALDH18A1. Analysis of serum amino acid levels revealed that two SPG9A patients and two unaffected family members had low citrulline levels and one had a low level of ornithine. Conclusions Since the newly occurring ALDH18A1 mutation, c.755G > A, is the same as that in two ADHSP families and one sporadic patient with SPG9A reported previously, this genomic site might easily undergo mutation. The patients with the c.755G > A mutation in our family showed clinical variability of symptoms like in the earlier reported two families and one sporadic patient with this mutation. Further studies are required to clarify the relationship between the amino acid levels and clinical manifestations, which will reveal how P5CS deficiency influences disease phenotypes including ARCL3A, ADCL3, SPG9B, and SPG9A.
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Affiliation(s)
- Kishin Koh
- Department of Neurology, Graduate School of Medical Sciences, University of Yamanashi, Yamanashi, 409-3898, Japan
| | - Ryusuke Takaki
- Department of Neurology, Graduate School of Medical Sciences, University of Yamanashi, Yamanashi, 409-3898, Japan.,Department of Neurology, Iida Hospital, Nagano, 395-8505, Japan
| | - Hiroyuki Ishiura
- Department of Neurology, Graduate School of Medicine, The University of Tokyo, Tokyo, 113-8655, Japan
| | - Shoji Tsuji
- Department of Molecular Neurology, University of Tokyo, Graduate School of Medicine, Tokyo, 113-8655, Japan.,Department of Neurology, International University of Health and Welfare, Chiba, 286-8686, Japan
| | - Yoshihisa Takiyama
- Department of Neurology, Graduate School of Medical Sciences, University of Yamanashi, Yamanashi, 409-3898, Japan.
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20
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Abstract
Pulmonary arterial hypertension (PAH) is characterized by impaired regulation of pulmonary hemodynamics and vascular growth. Alterations of metabolism and bioenergetics are increasingly recognized as universal hallmarks of PAH, as metabolic abnormalities are identified in lungs and hearts of patients, animal models of the disease, and cells derived from lungs of patients. Mitochondria are the primary organelle critically mediating the complex and integrative metabolic pathways in bioenergetics, biosynthetic pathways, and cell signaling. Here, we review the alterations in metabolic pathways that are linked to the pathologic vascular phenotype of PAH, including abnormalities in glycolysis and glucose oxidation, fatty acid oxidation, glutaminolysis, arginine metabolism, one-carbon metabolism, the reducing and oxidizing cell environment, and the tricarboxylic acid cycle, as well as the effects of PAH-associated nuclear and mitochondrial mutations on metabolism. Understanding of the metabolic mechanisms underlying PAH provides important knowledge for the design of new therapeutics for treatment of patients.
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Affiliation(s)
- Weiling Xu
- Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195, USA;
| | - Allison J Janocha
- Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195, USA;
| | - Serpil C Erzurum
- Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195, USA; .,Respiratory Institute, Cleveland Clinic, Cleveland, Ohio 44195, USA
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21
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Beyens A, Boel A, Symoens S, Callewaert B. Cutis laxa: A comprehensive overview of clinical characteristics and pathophysiology. Clin Genet 2020; 99:53-66. [PMID: 33058140 DOI: 10.1111/cge.13865] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 09/17/2020] [Accepted: 10/07/2020] [Indexed: 12/20/2022]
Abstract
Cutis laxa (CL) syndromes comprise a rare group of multisystem disorders that share loose redundant skin folds as hallmark clinical feature. CL results from impaired elastic fiber assembly and homeostasis, and the known underlying gene defects affect different extracellular matrix proteins, intracellular trafficking, or cellular metabolism. Due to the underlying clinical and molecular heterogeneity, the diagnostic work-up of CL patients is often challenging. In this review, we provide a practical approach to the broad differential diagnosis of CL syndromes, provide an overview of the molecular pathogenesis of the different subtypes, and suggest general management guidelines.
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Affiliation(s)
- Aude Beyens
- Center for Medical Genetics Ghent, Ghent University Hospital, Ghent, Belgium.,Department of Dermatology, Ghent University Hospital, Ghent, Belgium.,Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
| | - Annekatrien Boel
- Center for Medical Genetics Ghent, Ghent University Hospital, Ghent, Belgium.,Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
| | - Sofie Symoens
- Center for Medical Genetics Ghent, Ghent University Hospital, Ghent, Belgium.,Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
| | - Bert Callewaert
- Center for Medical Genetics Ghent, Ghent University Hospital, Ghent, Belgium.,Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
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22
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Hennekam RCM. Pathophysiology of premature aging characteristics in Mendelian progeroid disorders. Eur J Med Genet 2020; 63:104028. [PMID: 32791128 DOI: 10.1016/j.ejmg.2020.104028] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 07/27/2020] [Accepted: 07/31/2020] [Indexed: 12/15/2022]
Abstract
Aging is a physiological process that is in part genetically determined. Some of the signs and symptoms of aging also occur prematurely in Mendelian disorders. Such disorders are excellent sources of information of underlying mechanisms for these components of aging, and studying these may allow detection of pathways that have not yet considered in detail in physiological aging. Here I define the clinical characteristics that constitute aging and propose that at least 40% of aging signs and symptoms should be present before an entity should be tagged as progeroid. A literature search using these characteristics yields 17 entities that fulfill this definition: Hutchinson-Gilford progeria, mandibulo-acral dysplasia, Nestor-Guillermo progeria, Werner syndrome, Cockayne syndrome, cutis laxa progeroid, Penttinen progeroid syndrome, Mandibular underdevelopment, Deafness, Progeroid features, Lipodystrophy, Fontaine progeroid syndrome, SHORT syndrome, Wiedemann-Rautenstrauch syndrome, Mulvihill-Smith syndrome, dyskeratosis congenita, Marfan syndrome lipodystrophy type, Warburg-Cinotti syndrome, Lessel syndrome and Bloom syndrome. The presenting and main characteristics of these entities are indicated briefly. Their pathophysiology is not complete pathophysiology is reviewed but only the pathophysiology of the premature aging characteristics of this series of entities is compared to the known mechanisms ("Hallmarks") of physiological aging as summarized in the review paper by Lopez-Otin and colleagues. Although many causative genes have not been studied fully for all known aging mechanisms the comparison demonstrates that additional mechanisms must play a role to explain the aging characteristic in some of the progeroid entities of the progeroid entities, and possibly also in physiological aging.
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Affiliation(s)
- Raoul C M Hennekam
- Department of Paediatrics, Room H7-236, Amsterdam UMC - location AMC, Meibergdreef 9, 1105AZ, Amsterdam, the Netherlands.
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23
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Yang Z, Zhao X, Shang W, Liu Y, Ji JF, Liu JP, Tong C. Pyrroline-5-carboxylate synthase senses cellular stress and modulates metabolism by regulating mitochondrial respiration. Cell Death Differ 2020; 28:303-319. [PMID: 32770108 DOI: 10.1038/s41418-020-0601-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 07/10/2020] [Accepted: 07/23/2020] [Indexed: 11/09/2022] Open
Abstract
Pyrroline-5-carboxylate synthase (P5CS) catalyzes the synthesis of pyrroline-5-carboxylate (P5C), a key precursor for the synthesis of proline and ornithine. P5CS malfunction leads to multiple human diseases; however, the molecular mechanism underlying these diseases is unknown. We found that P5CS localizes in mitochondria in rod- and ring-like patterns but diffuses inside the mitochondria upon cellular starvation or exposure to oxidizing agents. Some of the human disease-related mutant forms of P5CS also exhibit diffused distribution. Multimerization (but not the catalytic activity) of P5CS regulates its localization. P5CS mutant cells have a reduced proliferation rate and are sensitive to cellular stresses. Flies lacking P5CS have reduced eclosion rates. Lipid droplets accumulate in the eyes of the newly eclosed P5CS mutant flies, which degenerate with aging. The loss of P5CS in cells leads to abnormal purine metabolism and lipid-droplet accumulation. The reduced lipid-droplet consumption is likely due to decreased expression of the fatty acid transporter, CPT1, and few β-oxidation-related genes following P5CS knockdown. Surprisingly, we found that P5CS is required for mitochondrial respiratory complex organization and that the respiration defects in P5CS knockout cells likely contribute to the metabolic defects in purine synthesis and lipid consumption. This study links amino acid synthesis with mitochondrial respiration and other key metabolic processes, whose imbalance might contribute to P5CS-related disease conditions.
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Affiliation(s)
- Zhaoying Yang
- MOE Key Laboratory for Biosystems Homeostasis and Protection and Innovation Center for Cell Signaling Network, Life Sciences Institute, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Xiaocui Zhao
- MOE Key Laboratory for Biosystems Homeostasis and Protection and Innovation Center for Cell Signaling Network, Life Sciences Institute, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Weina Shang
- MOE Key Laboratory for Biosystems Homeostasis and Protection and Innovation Center for Cell Signaling Network, Life Sciences Institute, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Yang Liu
- Centre of Stem Cell and Regenerative Medicine, School of Medicine, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Jun-Feng Ji
- Centre of Stem Cell and Regenerative Medicine, School of Medicine, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Jun-Ping Liu
- Institute of Ageing Research, Hangzhou Normal University College of Medicine, Hangzhou, 311121, China
| | - Chao Tong
- MOE Key Laboratory for Biosystems Homeostasis and Protection and Innovation Center for Cell Signaling Network, Life Sciences Institute, Zhejiang University, Hangzhou, 310058, Zhejiang, China. .,Institute of Ageing Research, Hangzhou Normal University College of Medicine, Hangzhou, 311121, China. .,The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, Zhejiang, China.
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24
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Marco-Marín C, Escamilla-Honrubia JM, Llácer JL, Seri M, Panza E, Rubio V. Δ 1 -Pyrroline-5-carboxylate synthetase deficiency: An emergent multifaceted urea cycle-related disorder. J Inherit Metab Dis 2020; 43:657-670. [PMID: 32017139 DOI: 10.1002/jimd.12220] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 01/13/2020] [Accepted: 01/30/2020] [Indexed: 12/15/2022]
Abstract
The bifunctional homooligomeric enzyme Δ1 -pyrroline-5-carboxylate synthetase (P5CS) and its encoding gene ALDH18A1 were associated with disease in 1998. Two siblings who presented paradoxical hyperammonemia (alleviated by protein), mental disability, short stature, cataracts, cutis laxa, and joint laxity, were found to carry biallelic ALDH18A1 mutations. They showed biochemical indications of decreased ornithine/proline synthesis, agreeing with the role of P5CS in the biosynthesis of these amino acids. Of 32 patients reported with this neurocutaneous syndrome, 21 familial ones hosted homozygous or compound heterozygous ALDH18A1 mutations, while 11 sporadic ones carried de novo heterozygous ALDH18A1 mutations. In 2015 to 2016, an upper motor neuron syndrome (spastic paraparesis/paraplegia SPG9) complicated with some traits of the neurocutaneous syndrome, although without report of cutis laxa, joint laxity, or herniae, was associated with monoallelic or biallelic ALDH18A1 mutations with, respectively, dominant and recessive inheritance. Of 50 SPG9 patients reported, 14 and 36 (34/2 familial/sporadic) carried, respectively, biallelic and monoallelic mutations. Thus, two neurocutaneous syndromes (recessive and dominant cutis laxa 3, abbreviated ARCL3A and ADCL3, respectively) and two SPG9 syndromes (recessive SPG9B and dominant SPG9A) are caused by essentially different spectra of ALDH18A1 mutations. On the bases of the clinical data (including our own prior patients' reports), the ALDH18A1 mutations spectra, and our knowledge on the P5CS protein, we conclude that the four syndromes share the same pathogenic mechanisms based on decreased P5CS function. Thus, these syndromes represent a continuum of increasing severity (SPG9A < SPG9B < ADCL3 ≤ ARCL3A) of the same disease, P5CS deficiency, in which the dominant mutations cause loss-of-function by dominant-negative mechanisms.
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Affiliation(s)
- Clara Marco-Marín
- Instituto de Biomedicina de Valencia of the CSIC, Valencia, Spain
- Centro para Investigación Biomédica en Red sobre Enfermedades Raras CIBERER-ISCIII, Valencia, Spain
| | - Juan M Escamilla-Honrubia
- Instituto de Biomedicina de Valencia of the CSIC, Valencia, Spain
- Centro para Investigación Biomédica en Red sobre Enfermedades Raras CIBERER-ISCIII, Valencia, Spain
| | - José L Llácer
- Instituto de Biomedicina de Valencia of the CSIC, Valencia, Spain
- Centro para Investigación Biomédica en Red sobre Enfermedades Raras CIBERER-ISCIII, Valencia, Spain
| | - Marco Seri
- Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
- Medical Genetics Unit, S. Orsola-Malpighi University Hospital, Bologna, Italy
| | - Emanuele Panza
- Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
| | - Vicente Rubio
- Instituto de Biomedicina de Valencia of the CSIC, Valencia, Spain
- Centro para Investigación Biomédica en Red sobre Enfermedades Raras CIBERER-ISCIII, Valencia, Spain
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25
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Rumping L, Vringer E, Houwen RHJ, van Hasselt PM, Jans JJM, Verhoeven‐Duif NM. Inborn errors of enzymes in glutamate metabolism. J Inherit Metab Dis 2020; 43:200-215. [PMID: 31603991 PMCID: PMC7078983 DOI: 10.1002/jimd.12180] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 10/01/2019] [Accepted: 10/04/2019] [Indexed: 12/29/2022]
Abstract
Glutamate is involved in a variety of metabolic pathways. We reviewed the literature on genetic defects of enzymes that directly metabolise glutamate, leading to inborn errors of glutamate metabolism. Seventeen genetic defects of glutamate metabolising enzymes have been reported, of which three were only recently identified. These 17 defects affect the inter-conversion of glutamine and glutamate, amino acid metabolism, ammonia detoxification, and glutathione metabolism. We provide an overview of the clinical and biochemical phenotypes of these rare defects in an effort to ease their recognition. By categorising these by biochemical pathway, we aim to create insight into the contributing role of deviant glutamate and glutamine levels to the pathophysiology. For those disorders involving the inter-conversion of glutamine and glutamate, these deviant levels are postulated to play a pivotal pathophysiologic role. For the other IEM however-with the exception of urea cycle defects-abnormal glutamate and glutamine concentrations were rarely reported. To create insight into the clinical consequences of disturbed glutamate metabolism-rather than individual glutamate and glutamine levels-the prevalence of phenotypic abnormalities within the 17 IEM was compared to their prevalence within all Mendelian disorders and subsequently all disorders with metabolic abnormalities notated in the Human Phenotype Ontology (HPO) database. For this, a hierarchical database of all phenotypic abnormalities of the 17 defects in glutamate metabolism based on HPO was created. A neurologic phenotypic spectrum of developmental delay, ataxia, seizures, and hypotonia are common in the inborn errors of enzymes in glutamate metabolism. Additionally, ophthalmologic and skin abnormalities are often present, suggesting that disturbed glutamate homeostasis affects tissues of ectodermal origin: brain, eye, and skin. Reporting glutamate and glutamine concentrations in patients with inborn errors of glutamate metabolism would provide additional insight into the pathophysiology.
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Affiliation(s)
- Lynne Rumping
- Department of GeneticsUniversity Medical Center Utrecht, Utrecht UniversityUtrechtthe Netherlands
- Center for Molecular MedicineUniversity Medical Center Utrecht, Utrecht UniversityUtrechtthe Netherlands
- Department of PediatricsUniversity Medical Center Utrecht, Utrecht UniversityUtrechtthe Netherlands
| | - Esmee Vringer
- Department of GeneticsUniversity Medical Center Utrecht, Utrecht UniversityUtrechtthe Netherlands
| | - Roderick H. J. Houwen
- Department of PediatricsUniversity Medical Center Utrecht, Utrecht UniversityUtrechtthe Netherlands
| | - Peter M. van Hasselt
- Department of PediatricsUniversity Medical Center Utrecht, Utrecht UniversityUtrechtthe Netherlands
| | - Judith J. M. Jans
- Department of GeneticsUniversity Medical Center Utrecht, Utrecht UniversityUtrechtthe Netherlands
- Center for Molecular MedicineUniversity Medical Center Utrecht, Utrecht UniversityUtrechtthe Netherlands
| | - Nanda M. Verhoeven‐Duif
- Department of GeneticsUniversity Medical Center Utrecht, Utrecht UniversityUtrechtthe Netherlands
- Center for Molecular MedicineUniversity Medical Center Utrecht, Utrecht UniversityUtrechtthe Netherlands
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26
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Kapoor S, Vats P, Polipalli S, Yuvaraj P. Predominant Motor Delay as a Major Presenting Clinical Sign in Cutis Laxa— Report of a Case with Review of Literature. Neurol India 2020; 68:919-921. [DOI: 10.4103/0028-3886.293457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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27
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Grelet M, Blanck V, Sigaudy S, Philip N, Giuliano F, Khachnaoui K, Morel G, Grotto S, Sophie J, Poirsier C, Lespinasse J, Alric L, Calvas P, Chalhoub G, Layet V, Molin A, Colson C, Marsili L, Edery P, Lévy N, De Sandre-Giovannoli A. Outcomes of 4 years of molecular genetic diagnosis on a panel of genes involved in premature aging syndromes, including laminopathies and related disorders. Orphanet J Rare Dis 2019; 14:288. [PMID: 31829210 PMCID: PMC6907233 DOI: 10.1186/s13023-019-1189-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Accepted: 08/30/2019] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Segmental progeroid syndromes are a heterogeneous group of rare and often severe genetic disorders that have been studied since the twentieth century. These progeroid syndromes are defined as segmental because only some of the features observed during natural aging are accelerated. METHODS Since 2015, the Molecular Genetics Laboratory in Marseille La Timone Hospital proposes molecular diagnosis of premature aging syndromes including laminopathies and related disorders upon NGS sequencing of a panel of 82 genes involved in these syndromes. We analyzed the results obtained in 4 years on 66 patients issued from France and abroad. RESULTS Globally, pathogenic or likely pathogenic variants (ACMG class 5 or 4) were identified in about 1/4 of the cases; among these, 9 pathogenic variants were novel. On the other hand, the diagnostic yield of our panel was over 60% when the patients were addressed upon a nosologically specific clinical suspicion, excepted for connective tissue disorders, for which clinical diagnosis may be more challenging. Prenatal testing was proposed to 3 families. We additionally detected 16 variants of uncertain significance and reclassified 3 of them as benign upon segregation analysis in first degree relatives. CONCLUSIONS High throughput sequencing using the Laminopathies/ Premature Aging disorders panel allowed molecular diagnosis of rare disorders associated with premature aging features and genetic counseling for families, representing an interesting first-level analysis before whole genome sequencing may be proposed, as a future second step, by the National high throughput sequencing platforms ("Medicine France Genomics 2025" Plan), in families without molecular diagnosis.
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Affiliation(s)
- Maude Grelet
- Department of Medical Genetics, Assistance Publique Hopitaux de Marseille, Marseille, France.,Aix Marseille Univ, INSERM, MMG, Marseille, France
| | - Véronique Blanck
- Department of Medical Genetics, Assistance Publique Hopitaux de Marseille, Marseille, France
| | - Sabine Sigaudy
- Department of Medical Genetics, Assistance Publique Hopitaux de Marseille, Marseille, France.,Aix Marseille Univ, INSERM, MMG, Marseille, France
| | - Nicole Philip
- Department of Medical Genetics, Assistance Publique Hopitaux de Marseille, Marseille, France.,Aix Marseille Univ, INSERM, MMG, Marseille, France
| | | | | | - Godelieve Morel
- Hospices Civils de Lyon, Genetic Department and National HHT Reference Center, Femme-Mère-Enfants Hospital, F-69677, Bron, France.,Université Claude Bernard Lyon 1, F-69100, Villeurbanne, France
| | - Sarah Grotto
- Genetics Department, AP-HP, Robert-Debré University Hospital, Paris, France
| | - Julia Sophie
- Department of Medical Genetics, CHU Toulouse, Purpan Hospital, 31059, Toulouse, France
| | - Céline Poirsier
- Department of Genetics, Reims University Hospital, Reims, France
| | - James Lespinasse
- Department of Genetics, Centre Hospitalier de Chambéry- Hôtel-dieu, Chambery, France
| | - Laurent Alric
- Internal Medicine, CHU Toulouse, Rangueil Hospital, Toulouse 3 University Hospital Center, Toulouse, France
| | - Patrick Calvas
- Department of Medical Genetics, CHU Toulouse, Purpan Hospital, 31059, Toulouse, France
| | | | - Valérie Layet
- Department of Genetics, Le Havre Hospital, F76600, Le Havre, France
| | - Arnaud Molin
- Department of Genetics, CHU de Caen, Avenue de la Cote de Nacre, 14000, Caen, France
| | - Cindy Colson
- Department of Genetics, CHU de Caen, Avenue de la Cote de Nacre, 14000, Caen, France
| | - Luisa Marsili
- Department of Clinical Genetics, Lille University Hospital, CHU, Lille, France
| | - Patrick Edery
- Hospices Civils de Lyon, Genetic Department and National HHT Reference Center, Femme-Mère-Enfants Hospital, F-69677, Bron, France.,Université Claude Bernard Lyon 1, F-69100, Villeurbanne, France
| | - Nicolas Lévy
- Department of Medical Genetics, Assistance Publique Hopitaux de Marseille, Marseille, France.,Aix Marseille Univ, INSERM, MMG, Marseille, France.,CRB-TAC (Biological Ressource Center-Tissues, DNA, Cells), Assistance Publique Hopitaux de Marseille, Marseille, France
| | - Annachiara De Sandre-Giovannoli
- Department of Medical Genetics, Assistance Publique Hopitaux de Marseille, Marseille, France. .,Aix Marseille Univ, INSERM, MMG, Marseille, France. .,CRB-TAC (Biological Ressource Center-Tissues, DNA, Cells), Assistance Publique Hopitaux de Marseille, Marseille, France.
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28
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Xu W, Comhair SAA, Chen R, Hu B, Hou Y, Zhou Y, Mavrakis LA, Janocha AJ, Li L, Zhang D, Willard BB, Asosingh K, Cheng F, Erzurum SC. Integrative proteomics and phosphoproteomics in pulmonary arterial hypertension. Sci Rep 2019; 9:18623. [PMID: 31819116 PMCID: PMC6901481 DOI: 10.1038/s41598-019-55053-6] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 11/21/2019] [Indexed: 02/06/2023] Open
Abstract
Pulmonary arterial endothelial cells (PAEC) are mechanistically linked to origins of pulmonary arterial hypertension (PAH). Here, global proteomics and phosphoproteomics of PAEC from PAH (n = 4) and healthy lungs (n = 5) were performed using LC-MS/MS to confirm known pathways and identify new areas of investigation in PAH. Among PAH and control cells, 170 proteins and 240 phosphopeptides were differentially expressed; of these, 45 proteins and 18 phosphopeptides were located in the mitochondria. Pathologic pathways were identified with integrative bioinformatics and human protein-protein interactome network analyses, then confirmed with targeted proteomics in PAH PAEC and non-targeted metabolomics and targeted high-performance liquid chromatography of metabolites in plasma from PAH patients (n = 30) and healthy controls (n = 12). Dysregulated pathways in PAH include accelerated one carbon metabolism, abnormal tricarboxylic acid (TCA) cycle flux and glutamate metabolism, dysfunctional arginine and nitric oxide pathways, and increased oxidative stress. Functional studies in cells confirmed abnormalities in glucose metabolism, mitochondrial oxygen consumption, and production of reactive oxygen species in PAH. Altogether, the findings indicate that PAH is typified by changes in metabolic pathways that are primarily found in mitochondria.
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Affiliation(s)
- Weiling Xu
- Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America.
| | - Suzy A A Comhair
- Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Ruoying Chen
- Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Bo Hu
- Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Yuan Hou
- Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Yadi Zhou
- Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Lori A Mavrakis
- Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Allison J Janocha
- Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Ling Li
- Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Dongmei Zhang
- Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Belinda B Willard
- Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Kewal Asosingh
- Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Feixiong Cheng
- Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
| | - Serpil C Erzurum
- Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, United States of America. .,Respiratory Institute, Cleveland Clinic, Cleveland, Ohio, United States of America.
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29
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Magini P, Marco-Marin C, Escamilla-Honrubia JM, Martinelli D, Dionisi-Vici C, Faravelli F, Forzano F, Seri M, Rubio V, Panza E. P5CS expression study in a new family with ALDH18A1-associated hereditary spastic paraplegia SPG9. Ann Clin Transl Neurol 2019; 6:1533-1540. [PMID: 31402623 PMCID: PMC6689680 DOI: 10.1002/acn3.50821] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Revised: 05/14/2019] [Accepted: 05/28/2019] [Indexed: 12/14/2022] Open
Abstract
In 2015–2016, we and others reported ALDH18A1 mutations causing dominant (SPG9A) or recessive (SPG9B) spastic paraplegia. In vitro production of the ALDH18A1 product, Δ1‐pyrroline‐5‐carboxylate synthetase (P5CS), appeared necessary for cracking SPG9 disease‐causing mechanisms. We now describe a baculovirus–insect cell system that yields mgs of pure human P5CS and that has proven highly valuable with two novel P5CS mutations reported here in new SPG9B patients. We conclude that both mutations are disease‐causing, that SPG9B associates with partial P5CS deficiency and that it is clinically more severe than SPG9A, as reflected in onset age, disability, cognitive status, growth, and dysmorphic traits.
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Affiliation(s)
- Pamela Magini
- Medical Genetics Unit, S. Orsola-Malpighi Hospital, Bologna, Italy
| | - Clara Marco-Marin
- Instituto de Biomedicina de Valencia of the CSIC, Valencia, Spain.,Centro para Investigación Biomédica en Red sobre Enfermedades Raras CIBERER-ISCIII, Valencia, Spain
| | - Juan M Escamilla-Honrubia
- Instituto de Biomedicina de Valencia of the CSIC, Valencia, Spain.,Centro para Investigación Biomédica en Red sobre Enfermedades Raras CIBERER-ISCIII, Valencia, Spain
| | - Diego Martinelli
- Division of Metabolism, Bambino Gesù Children's Research Hospital, Rome, Italy
| | - Carlo Dionisi-Vici
- Division of Metabolism, Bambino Gesù Children's Research Hospital, Rome, Italy
| | - Francesca Faravelli
- Clinical Genetics, NE Thames Regional Genetics Service, Great Ormond Street Hospital for Children, NHS Foundation Trust, London, United Kingdom
| | - Francesca Forzano
- Clinical Genetics Department, SE Thames Regional Genetics Service, Guy's & St Thomas' NHS Foundation Trust, London, United Kingdom
| | - Marco Seri
- Medical Genetics Unit, S. Orsola-Malpighi Hospital, Bologna, Italy.,Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
| | - Vicente Rubio
- Instituto de Biomedicina de Valencia of the CSIC, Valencia, Spain.,Centro para Investigación Biomédica en Red sobre Enfermedades Raras CIBERER-ISCIII, Valencia, Spain
| | - Emanuele Panza
- Medical Genetics Unit, S. Orsola-Malpighi Hospital, Bologna, Italy.,Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
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30
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Chen X, Yang Y, Chang T, Xu B, Wei H. Comparative Transcriptome Analysis of Unusual Localized Skin Laxity in Sika Deer ( Cervus nippon). DNA Cell Biol 2019; 38:670-677. [PMID: 31188027 DOI: 10.1089/dna.2019.4730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Cutis laxa represents a heterogeneous group of rare, inherited, or acquired connective tissue disorders with the common feature of loose and redundant skin with decreased elasticity. The skin of affected deer showed abnormal collagen fiber morphology. To identify the differentially expressed genes of the unusual localized skin laxity in sika deer, we performed transcriptome analysis in the affected and control sika deer. The transcriptome analysis showed 700 genes with significant differential expression in the affected skin as compared with normal skin. Pathway analysis revealed an enrichment of genes involved in tumor necrosis factor signaling, the extracellular matrix-receptor interaction, platelet activation, and Huntington's disease. A gene network was constructed, and the hub nodes such as PTGS2, THBS1, COL1A1, FOS, and NOS3 were found through PPI network analysis, which may contributed to the unusual localized skin laxity in sika deer. Abnormal expression patterns of genes during the development of the affected sika deer were successfully uncovered in the present study, which provides a reference for revealing the related mechanism underlying cutis laxa in sika deer and human beings.
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Affiliation(s)
- Xiumin Chen
- 1 Institute of Special Animals and Plant Sciences, Chinese Academy of Agricultural Sciences, Changchun, China
| | - Yifeng Yang
- 1 Institute of Special Animals and Plant Sciences, Chinese Academy of Agricultural Sciences, Changchun, China.,2 Key Laboratory of Molecular Biology in Special Economic Animals, Changchun, China
| | - Tong Chang
- 1 Institute of Special Animals and Plant Sciences, Chinese Academy of Agricultural Sciences, Changchun, China
| | - Baozeng Xu
- 1 Institute of Special Animals and Plant Sciences, Chinese Academy of Agricultural Sciences, Changchun, China.,2 Key Laboratory of Molecular Biology in Special Economic Animals, Changchun, China
| | - Haijun Wei
- 1 Institute of Special Animals and Plant Sciences, Chinese Academy of Agricultural Sciences, Changchun, China.,2 Key Laboratory of Molecular Biology in Special Economic Animals, Changchun, China
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31
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Fischer-Zirnsak B, Koenig R, Alisch F, Güneş N, Hausser I, Saha N, Beck-Woedl S, Haack TB, Thiel C, Kamrath C, Tüysüz B, Henning S, Mundlos S, Hoffmann K, Horn D, Kornak U. SOPH syndrome in three affected individuals showing similarities with progeroid cutis laxa conditions in early infancy. J Hum Genet 2019; 64:609-616. [DOI: 10.1038/s10038-019-0602-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 03/26/2019] [Accepted: 04/05/2019] [Indexed: 02/08/2023]
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32
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Panza E, Martinelli D, Magini P, Dionisi Vici C, Seri M. Hereditary Spastic Paraplegia Is a Common Phenotypic Finding in ARG1 Deficiency, P5CS Deficiency and HHH Syndrome: Three Inborn Errors of Metabolism Caused by Alteration of an Interconnected Pathway of Glutamate and Urea Cycle Metabolism. Front Neurol 2019; 10:131. [PMID: 30853934 PMCID: PMC6395431 DOI: 10.3389/fneur.2019.00131] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 01/31/2019] [Indexed: 12/11/2022] Open
Abstract
Hereditary Spastic Paraplegias (HSPs) are a clinically and genetically heterogeneous group of neurodegenerative disorders characterized by a progressive rigidity and weakness of the lower limbs, caused by pyramidal tract lesions. As of today, 80 different forms of HSP have been mapped, 64 genes have been cloned, and new forms are constantly being described. HSPs represent an intensively studied field, and the functional understanding of the biochemical and molecular pathogenetic pathways are starting to be elucidated. Recently, dominant and recessive mutations in the ALDH18A1 gene resulting in the deficiency of the encoded enzyme (delta-1-pyrroline-5-carboxylate synthase, P5CS) have been pathogenetically linked to HSP. P5CS is a critical enzyme in the conversion of glutamate to pyrroline-5-carboxylate, an intermediate that enters in the proline biosynthesis and that is connected with the urea cycle. Interestingly, two urea cycle disorders, Argininemia and Hyperornithinemia-Hyperammonemia-Homocitrullinuria syndrome, are clinically characterized by highly penetrant spastic paraplegia. These three diseases represent a peculiar group of HSPs caused by Inborn Errors of Metabolism. Here we comment on these forms, on the common features among them and on the hypotheses for possible shared pathogenetic mechanisms causing the HSP phenotype.
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Affiliation(s)
- Emanuele Panza
- Medical Genetics Unit, S. Orsola-Malpighi Hospital, Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
| | - Diego Martinelli
- Division of Metabolism, Bambino Gesù Children's Research Hospital, Rome, Italy
| | - Pamela Magini
- Medical Genetics Unit, Policlinico S. Orsola-Malpighi, Bologna, Italy
| | - Carlo Dionisi Vici
- Division of Metabolism, Bambino Gesù Children's Research Hospital, Rome, Italy
| | - Marco Seri
- Medical Genetics Unit, S. Orsola-Malpighi Hospital, Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy
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33
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Mueller N, Sassa T, Morales-Gonzalez S, Schneider J, Salchow DJ, Seelow D, Knierim E, Stenzel W, Kihara A, Schuelke M. De novo mutation in ELOVL1 causes ichthyosis, acanthosis nigricans, hypomyelination, spastic paraplegia, high frequency deafness and optic atrophy. J Med Genet 2018; 56:164-175. [PMID: 30487246 DOI: 10.1136/jmedgenet-2018-105711] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 11/07/2018] [Accepted: 11/13/2018] [Indexed: 12/21/2022]
Abstract
BACKGROUND Very long-chain fatty acids (VLCFAs) are essential for functioning of biological membranes. ELOVL fatty acid elongase 1 catalyses elongation of saturated and monounsaturated C22-C26-VLCFAs. We studied two patients with a dominant ELOVL1 mutation. Independently, Kutkowska-Kaźmierczak et al. had investigated the same patients and found the same mutation. We extended our study towards additional biochemical, functional, and therapeutic aspects. METHODS We did mutation screening by whole exome sequencing. RNA-sequencing was performed in patient and control fibroblasts. Ceramide and sphingomyelin levels were measured by LC-MS/MS. ELOVL1 activity was determined by a stable isotope-labelled [13C]malonyl-CoA elongation assay. ELOVL1 expression patterns were investigated by immunofluorescence, in situ hybridisation and RT-qPCR. As treatment option, we investigated VLCFA loading of fibroblasts. RESULTS Both patients carried an identical heterozygous de novo ELOVL1 mutation (c.494C>T, NM_001256399; p.S165F) not deriving from a founder allele. Patients suffered from epidermal hyperproliferation and increased keratinisation (ichthyosis). Hypomyelination of the central white matter explained spastic paraplegia and central nystagmus, while optic atrophy was causative for reduction of peripheral vision and visual acuity. The mutation abrogated ELOVL1 enzymatic activity and reduced ≥C24 ceramides and sphingomyelins in patient cells. Fibroblast loading with C22:0-VLCFAs increased C24:0-ceramides and sphingomyelins. We found competitive inhibition for ceramide and sphingomyelin synthesis between saturated and monounsaturated VLCFAs. Transcriptome analysis revealed upregulation of modules involved in epidermal development and keratinisation, and downregulation of genes for neurodevelopment, myelination, and synaptogenesis. Many regulated genes carried consensus proliferator-activated receptor (PPAR)α and PPARγ binding motifs in their 5'-regions. CONCLUSION A dominant ELOVL1 mutation causes a neuro-ichthyotic disorder possibly amenable to treatment with PPAR-modulating drugs.
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Affiliation(s)
- Noomi Mueller
- NeuroCure Clinical Research Center, Charité-Universitätsmedizin Berlin, Berlin, Germany.,Department of Neuropediatrics, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Takayuki Sassa
- Faculty of Pharmaceutical Sciences, Laboratory of Biochemistry, Hokkaido University, Sapporo, Japan
| | | | - Joanna Schneider
- Department of Neuropediatrics, Charité-Universitätsmedizin Berlin, Berlin, Germany.,Berlin Institute of Health, Berlin, Germany
| | - Daniel J Salchow
- Department of Ophthalmology, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Dominik Seelow
- NeuroCure Clinical Research Center, Charité-Universitätsmedizin Berlin, Berlin, Germany.,Berlin Institute of Health, Berlin, Germany
| | - Ellen Knierim
- NeuroCure Clinical Research Center, Charité-Universitätsmedizin Berlin, Berlin, Germany.,Department of Neuropediatrics, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Werner Stenzel
- Institute of Neuropathology, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Akio Kihara
- Faculty of Pharmaceutical Sciences, Laboratory of Biochemistry, Hokkaido University, Sapporo, Japan
| | - Markus Schuelke
- NeuroCure Clinical Research Center, Charité-Universitätsmedizin Berlin, Berlin, Germany.,Department of Neuropediatrics, Charité-Universitätsmedizin Berlin, Berlin, Germany
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34
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Lefebvre M, Beaufrere AM, Francannet C, Laurichesse H, Poe C, Jouan T, Troude B, Dechelotte P, Vabres P, Briard M, Mosca-Boidron AL, Duffourd Y, Faivre L, Thevenon J, Thauvin-Robinet C. Extending the ALDH18A1 clinical spectrum to severe autosomal recessive fetal cutis laxa with corpus callosum agenesis. Am J Med Genet A 2018; 176:2509-2512. [PMID: 30244529 DOI: 10.1002/ajmg.a.40515] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 07/16/2018] [Accepted: 07/23/2018] [Indexed: 01/05/2023]
Affiliation(s)
- Mathilde Lefebvre
- Inserm UMR1231 GAD « Génétique des Anomalies du Développement » (GAD), Université de Bourgogne, Dijon, France
| | | | | | | | - Charlotte Poe
- Inserm UMR1231 GAD « Génétique des Anomalies du Développement » (GAD), Université de Bourgogne, Dijon, France
| | - Thibaud Jouan
- Inserm UMR1231 GAD « Génétique des Anomalies du Développement » (GAD), Université de Bourgogne, Dijon, France
| | - Baptiste Troude
- Centre de Génétique, Hôpital d'Estaing, Clermont-Ferrand, France
| | - Pierre Dechelotte
- Service d'Anatomie et Cytologie Pathologique, Clermont-Ferrand, France
| | | | - Marie Briard
- Service de radiologie pédiatrique, Hôpital d'Estaing, Clermont-Ferrand, France
| | | | - Yannis Duffourd
- Inserm UMR1231 GAD « Génétique des Anomalies du Développement » (GAD), Université de Bourgogne, Dijon, France
| | - Laurence Faivre
- Inserm UMR1231 GAD « Génétique des Anomalies du Développement » (GAD), Université de Bourgogne, Dijon, France.,Centre de Génétique et Centre de Référence Anomalies du Développement et Syndromes Malformatifs de l'Est, FHU-TRANSLAD, CHU Dijon, Dijon, France
| | - Julien Thevenon
- Inserm UMR1231 GAD « Génétique des Anomalies du Développement » (GAD), Université de Bourgogne, Dijon, France.,Centre de Génétique et Centre de Référence Anomalies du Développement et Syndromes Malformatifs de l'Est, FHU-TRANSLAD, CHU Dijon, Dijon, France
| | - Christel Thauvin-Robinet
- Inserm UMR1231 GAD « Génétique des Anomalies du Développement » (GAD), Université de Bourgogne, Dijon, France.,Centre de Génétique et Centre de Référence Anomalies du Développement et Syndromes Malformatifs de l'Est, FHU-TRANSLAD, CHU Dijon, Dijon, France
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35
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Beyens A, Moreno-Artero E, Bodemer C, Cox H, Gezdirici A, Yilmaz Gulec E, Kahloul N, Khau Van Kien P, Ogur G, Harroche A, Vasse M, Salhi A, Symoens S, Hadj-Rabia S, Callewaert B. ATP6V0A2-related cutis laxa in 10 novel patients: Focus on clinical variability and expansion of the phenotype. Exp Dermatol 2018; 28:1142-1145. [PMID: 29952037 DOI: 10.1111/exd.13723] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/22/2018] [Indexed: 01/11/2023]
Abstract
In ATP6V0A2-related cutis laxa, the skin phenotype varies from a wrinkly skin to prominent cutis laxa and typically associates with skeletal and neurological manifestations. The phenotype remains incompletely characterized, especially in adult patients. Glycosylation defects and reduced acidification of secretory vesicles contribute to the pathogenesis, but the consequences at the clinical level remain to be determined. Moreover, the morphology of the elastic fibres has not been studied in ATP6V0A2-related cutis laxa, nor its relation with potential clinical risks. We report on the extreme variability in ATP6V0A2-related cutis laxa in 10 novel patients, expand the phenotype with emphysema and von Willebrand disease and hypothesize on the pathogenesis that might link both with deficiency of glycosylation and with elastic fibre anomalies. Our data will affect clinical management of patients with ATP6V0A2-related cutis laxa.
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Affiliation(s)
- Aude Beyens
- Center for Medical Genetics, Ghent University Hospital, Ghent, Belgium
| | - Ester Moreno-Artero
- Reference Centre for Genodermatoses and Rare Skin Diseases (MAGEC) & Department of Dermatology, Department of Paediatric Social Work, INSERM U1163 & Institut Imagine, Hôpital Universitaire Necker-Enfants Malades, APHP, Université Paris Descartes - Sorbonne Paris Cité, Paris, France
| | - Christine Bodemer
- Reference Centre for Genodermatoses and Rare Skin Diseases (MAGEC) & Department of Dermatology, Department of Paediatric Social Work, INSERM U1163 & Institut Imagine, Hôpital Universitaire Necker-Enfants Malades, APHP, Université Paris Descartes - Sorbonne Paris Cité, Paris, France
| | - Helen Cox
- West Midlands Regional Clinical Genetics Service, Clinical Genetics Unit, Birmingham Women's and Children's NHS Foundation Trust, Birmingham, UK
| | - Alper Gezdirici
- Department of Medical Genetics, Kanuni Sultan Suleyman Training and Research Hospital, Health Sciences University, Istanbul, Turkey
| | - Elif Yilmaz Gulec
- Department of Medical Genetics, Kanuni Sultan Suleyman Training and Research Hospital, Health Sciences University, Istanbul, Turkey
| | - Najoua Kahloul
- Center for Pediatrics, CHU Farhat Hached De Sousse, Sousse, Tunisia
| | - Philippe Khau Van Kien
- Department of Medical Genetics, Centre Hospitalier Régional Universitaire de Nîmes, Nîmes, France
| | - Gonul Ogur
- Department of Pediatric Genetics, Faculty of Medicine, Ondokuz Mayis University, Samsun, Turkey
| | - Annie Harroche
- Service d'Hématologie Clinique, Centre de Traitement de l'Hémophilie, Hôpital Universitaire Necker-Enfants Malades, Paris, France
| | - Marc Vasse
- Department of Clinical Biology & INSERM UMR-S1176, Foch Hospital, Suresnes, Le Kremlin-Bicêtre, France
| | - Aïcha Salhi
- Service de Dermatologie, Faculté de Médecine d'Alger, Université d'Alger, Alger, Algeria
| | - Sofie Symoens
- Center for Medical Genetics, Ghent University Hospital, Ghent, Belgium
| | - Smail Hadj-Rabia
- Reference Centre for Genodermatoses and Rare Skin Diseases (MAGEC) & Department of Dermatology, Department of Paediatric Social Work, INSERM U1163 & Institut Imagine, Hôpital Universitaire Necker-Enfants Malades, APHP, Université Paris Descartes - Sorbonne Paris Cité, Paris, France
| | - Bert Callewaert
- Center for Medical Genetics, Ghent University Hospital, Ghent, Belgium
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Koh K, Ishiura H, Beppu M, Shimazaki H, Ichinose Y, Mitsui J, Kuwabara S, Tsuji S, Takiyama Y. Novel mutations in the ALDH18A1 gene in complicated hereditary spastic paraplegia with cerebellar ataxia and cognitive impairment. J Hum Genet 2018; 63:1009-1013. [DOI: 10.1038/s10038-018-0477-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 05/17/2018] [Accepted: 05/24/2018] [Indexed: 12/11/2022]
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Ferreira CR, van Karnebeek CDM, Vockley J, Blau N. A proposed nosology of inborn errors of metabolism. Genet Med 2018; 21:102-106. [PMID: 29884839 PMCID: PMC6286709 DOI: 10.1038/s41436-018-0022-8] [Citation(s) in RCA: 132] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 01/29/2018] [Accepted: 03/20/2018] [Indexed: 01/13/2023] Open
Abstract
Purpose We propose a nosology for inborn errors of metabolism that builds on their recent redefinition. Methods We established a strict definition of criteria in order to develop a self-consistent schema for inclusion of a disorder into the nosology. Results We identified 1,015 well-characterized inborn errors of metabolism described in the literature. In addition, there are 111 less well-characterized conditions that may be inborn errors but do not meet strict criteria for inclusion in the current nosology. Conclusion We provide a master list of all currently recognized inborn errors of metabolism grouped according to their pathophysiological basis, with the hope of setting a standard against which new errors should be defined, as well as to promote awareness and foster collaboration in the area. With the rapid advances in the field of genetics in recent years, it is likely that this nosology will need to be updated in the near future, a process that will benefit from broader input and collaboration of experts in the field in order to improve future versions of the proposed classification.
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Affiliation(s)
- Carlos R Ferreira
- National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, USA. .,Division of Genetics and Metabolism, Children's National Health System, Washington, DC, USA.
| | - Clara D M van Karnebeek
- Departments of Pediatrics and Clinical Genetics, Academic Medical Centre, Amsterdam, The Netherlands.,Department of Pediatrics, Centre for Molecular Medicine and Therapeutics, University of British Columbia, Vancouver, BC, Canada
| | - Jerry Vockley
- Department of Pediatrics, University of Pittsburgh School of Medicine, Department of Human Genetics, Graduate School of Public Health, Pittsburgh, Pennsylvania, USA
| | - Nenad Blau
- Dietmar-Hopp Metabolic Center, University Children's Hospital, Heidelberg, Germany
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Compound heterozygous mutations in two different domains of ALDH18A1 do not affect the amino acid levels in a patient with hereditary spastic paraplegia. Neurogenetics 2018; 19:145-149. [PMID: 29754261 DOI: 10.1007/s10048-018-0547-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Accepted: 05/05/2018] [Indexed: 10/16/2022]
Abstract
Mutations in ALDH18A1 can cause autosomal recessive and dominant hereditary spastic paraplegia and autosomal recessive and dominant cutis laxa. ALDH18A1 encodes delta-1-pyrroline-5-carboxylate synthetase (P5CS), which consists of two domains, the glutamate 5-kinase (G5K) and the gamma-glutamyl phosphate reductase (GR5P) domain. The location of the mutations in the gene has influence on whether the amino acid levels are affected. Mutations affecting the G5K domain have previously been found to cause reduced plasma levels of proline, citrulline and arginine, whereas such effect is not seen with mutations affecting the GR5P domain. We present a 19-year old male patient with autosomal recessive spastic paraplegia and compound heterozygosity for two ALDH18A1 mutations, one in each of the P5CS domains. This young man has spastic paraplegia with onset in childhood and temporal lobe epilepsy, but normal levels of proline, ornithine and arginine. To our knowledge, this is the first case with compound heterozygous mutations affecting both P5CS domains, where levels of plasma amino acids have been reported.
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Arseni L, Lombardi A, Orioli D. From Structure to Phenotype: Impact of Collagen Alterations on Human Health. Int J Mol Sci 2018; 19:ijms19051407. [PMID: 29738498 PMCID: PMC5983607 DOI: 10.3390/ijms19051407] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Revised: 04/29/2018] [Accepted: 05/04/2018] [Indexed: 01/04/2023] Open
Abstract
The extracellular matrix (ECM) is a highly dynamic and heterogeneous structure that plays multiple roles in living organisms. Its integrity and homeostasis are crucial for normal tissue development and organ physiology. Loss or alteration of ECM components turns towards a disease outcome. In this review, we provide a general overview of ECM components with a special focus on collagens, the most abundant and diverse ECM molecules. We discuss the different functions of the ECM including its impact on cell proliferation, migration and differentiation by highlighting the relevance of the bidirectional cross-talk between the matrix and surrounding cells. By systematically reviewing all the hereditary disorders associated to altered collagen structure or resulting in excessive collagen degradation, we point to the functional relevance of the collagen and therefore of the ECM elements for human health. Moreover, the large overlapping spectrum of clinical features of the collagen-related disorders makes in some cases the patient clinical diagnosis very difficult. A better understanding of ECM complexity and molecular mechanisms regulating the expression and functions of the various ECM elements will be fundamental to fully recognize the different clinical entities.
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Affiliation(s)
- Lavinia Arseni
- Department of Molecular Genetics, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany.
| | - Anita Lombardi
- Istituto di Genetica Molecolare, Consiglio Nazionale delle Ricerche, 27100 Pavia, Italy.
| | - Donata Orioli
- Istituto di Genetica Molecolare, Consiglio Nazionale delle Ricerche, 27100 Pavia, Italy.
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Ehmke N, Graul-Neumann L, Smorag L, Koenig R, Segebrecht L, Magoulas P, Scaglia F, Kilic E, Hennig AF, Adolphs N, Saha N, Fauler B, Kalscheuer VM, Hennig F, Altmüller J, Netzer C, Thiele H, Nürnberg P, Yigit G, Jäger M, Hecht J, Krüger U, Mielke T, Krawitz PM, Horn D, Schuelke M, Mundlos S, Bacino CA, Bonnen PE, Wollnik B, Fischer-Zirnsak B, Kornak U. De Novo Mutations in SLC25A24 Cause a Craniosynostosis Syndrome with Hypertrichosis, Progeroid Appearance, and Mitochondrial Dysfunction. Am J Hum Genet 2017; 101:833-843. [PMID: 29100093 DOI: 10.1016/j.ajhg.2017.09.016] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Accepted: 09/19/2017] [Indexed: 12/28/2022] Open
Abstract
Gorlin-Chaudhry-Moss syndrome (GCMS) is a dysmorphic syndrome characterized by coronal craniosynostosis and severe midface hypoplasia, body and facial hypertrichosis, microphthalmia, short stature, and short distal phalanges. Variable lipoatrophy and cutis laxa are the basis for a progeroid appearance. Using exome and genome sequencing, we identified the recurrent de novo mutations c.650G>A (p.Arg217His) and c.649C>T (p.Arg217Cys) in SLC25A24 in five unrelated girls diagnosed with GCMS. Two of the girls had pronounced neonatal progeroid features and were initially diagnosed with Wiedemann-Rautenstrauch syndrome. SLC25A24 encodes a mitochondrial inner membrane ATP-Mg/Pi carrier. In fibroblasts from affected individuals, the mutated SLC25A24 showed normal stability. In contrast to control cells, the probands' cells showed mitochondrial swelling, which was exacerbated upon treatment with hydrogen peroxide (H2O2). The same effect was observed after overexpression of the mutant cDNA. Under normal culture conditions, the mitochondrial membrane potential of the probands' fibroblasts was intact, whereas ATP content in the mitochondrial matrix was lower than that in control cells. However, upon H2O2 exposure, the membrane potential was significantly elevated in cells harboring the mutated SLC25A24. No reduction of mitochondrial DNA copy number was observed. These findings demonstrate that mitochondrial dysfunction with increased sensitivity to oxidative stress is due to the SLC25A24 mutations. Our results suggest that the SLC25A24 mutations induce a gain of pathological function and link mitochondrial ATP-Mg/Pi transport to the development of skeletal and connective tissue.
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41
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Imaging in cutis laxa syndrome caused by a dominant negative ALDH18A1 mutation, with hypotheses for intracranial vascular tortuosity and wide perivascular spaces. Eur J Paediatr Neurol 2017; 21:912-920. [PMID: 28757335 DOI: 10.1016/j.ejpn.2017.07.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 07/07/2017] [Accepted: 07/09/2017] [Indexed: 01/09/2023]
Abstract
The autosomal dominant progeroid form of cutis laxa is a recently identified multiple congenital anomaly disorder characterized by thin, wrinkled skin, a progeroid appearance, intra-uterine growth retardation, postnatal growth restriction, psychomotor developmental delay, microcephaly, cataract, hypotonia and contractures. De novo heterozygous mutations in ALDH18A1 have been described in this condition. We present neuroimaging abnormalities in three patients. One patient had intracranial arterial and venous tortuosity, widened ventricular and extra-axial cerebrospinal fluid (CSF) spaces, wide perivascular spaces and increased T2 signal intensity in the cerebral white matter over time. The second patient had vascular tortuosity. The third patient had prominent ventricular and extra-axial cerebrospinal fluid (CSF) spaces on CT. We propose an embryological mechanism for the development of intracranial vascular tortuosity and discuss the anatomical basis of wide perivascular spaces in relation to this syndrome. Although we do not know the clinical implications of these cerebral vascular anomalies, we suggest inclusion of neuroimaging in the baseline evaluation of these patients.
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Abstract
In recent years the number of disorders known to affect amino acid synthesis has grown rapidly. Nor is it just the number of disorders that has increased: the associated clinical phenotypes have also expanded spectacularly, primarily due to the advances of next generation sequencing diagnostics. In contrast to the "classical" inborn errors of metabolism in catabolic pathways, in which elevated levels of metabolites are easily detected in body fluids, synthesis defects present with low values of metabolites or, confusingly, even completely normal levels of amino acids. This makes the biochemical diagnosis of this relatively new group of metabolic diseases challenging. Defects in the synthesis pathways of serine metabolism, glutamine, proline and, recently, asparagine have all been reported. Although these amino acid synthesis defects are in unrelated metabolic pathways, they do share many clinical features. In children the central nervous system is primarily affected, giving rise to (congenital) microcephaly, early onset seizures and varying degrees of mental disability. The brain abnormalities are accompanied by skin disorders such as cutis laxa in defects of proline synthesis, collodion-like skin and ichthyosis in serine deficiency, and necrolytic erythema in glutamine deficiency. Hypomyelination with accompanying loss of brain volume and gyration defects can be observed on brain MRI in all synthesis disorders. In adults with defects in serine or proline synthesis, spastic paraplegia and several forms of polyneuropathy with or without intellectual disability appear to be the major symptoms in these late-presenting forms of amino acid disorders. This review provides a comprehensive overview of the disorders in amino acid synthesis.
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Affiliation(s)
- T J de Koning
- Paediatrician for Inborn Errors of Metabolism, University of Groningen, University Medical Centre Groningen, Groningen, Netherlands.
- Department of Genetics and Paediatrics, HPC CB50, P.O. Box 30001, 9700 RB, Groningen, The Netherlands.
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Kremer LS, Bader DM, Mertes C, Kopajtich R, Pichler G, Iuso A, Haack TB, Graf E, Schwarzmayr T, Terrile C, Koňaříková E, Repp B, Kastenmüller G, Adamski J, Lichtner P, Leonhardt C, Funalot B, Donati A, Tiranti V, Lombes A, Jardel C, Gläser D, Taylor RW, Ghezzi D, Mayr JA, Rötig A, Freisinger P, Distelmaier F, Strom TM, Meitinger T, Gagneur J, Prokisch H. Genetic diagnosis of Mendelian disorders via RNA sequencing. Nat Commun 2017; 8:15824. [PMID: 28604674 PMCID: PMC5499207 DOI: 10.1038/ncomms15824] [Citation(s) in RCA: 352] [Impact Index Per Article: 50.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Accepted: 04/28/2017] [Indexed: 12/23/2022] Open
Abstract
Across a variety of Mendelian disorders, ∼50-75% of patients do not receive a genetic diagnosis by exome sequencing indicating disease-causing variants in non-coding regions. Although genome sequencing in principle reveals all genetic variants, their sizeable number and poorer annotation make prioritization challenging. Here, we demonstrate the power of transcriptome sequencing to molecularly diagnose 10% (5 of 48) of mitochondriopathy patients and identify candidate genes for the remainder. We find a median of one aberrantly expressed gene, five aberrant splicing events and six mono-allelically expressed rare variants in patient-derived fibroblasts and establish disease-causing roles for each kind. Private exons often arise from cryptic splice sites providing an important clue for variant prioritization. One such event is found in the complex I assembly factor TIMMDC1 establishing a novel disease-associated gene. In conclusion, our study expands the diagnostic tools for detecting non-exonic variants and provides examples of intronic loss-of-function variants with pathological relevance.
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Affiliation(s)
- Laura S. Kremer
- Institute of Human Genetics, Helmholtz Zentrum München, 85764 Neuherberg, Germany
- Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität München, 81675 München, Germany
| | - Daniel M. Bader
- Department of Informatics, Technische Universität München, 85748 Garching, Germany
- Quantitative Biosciences Munich, Gene Center, Department of Biochemistry, Ludwig Maximilian Universität München, 81377 München, Germany
| | - Christian Mertes
- Department of Informatics, Technische Universität München, 85748 Garching, Germany
| | - Robert Kopajtich
- Institute of Human Genetics, Helmholtz Zentrum München, 85764 Neuherberg, Germany
- Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität München, 81675 München, Germany
| | - Garwin Pichler
- Department of Proteomics and Signal Transduction, Max-Planck Institute of Biochemistry, 82152 Martinsried, Germany
| | - Arcangela Iuso
- Institute of Human Genetics, Helmholtz Zentrum München, 85764 Neuherberg, Germany
- Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität München, 81675 München, Germany
| | - Tobias B. Haack
- Institute of Human Genetics, Helmholtz Zentrum München, 85764 Neuherberg, Germany
- Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität München, 81675 München, Germany
| | - Elisabeth Graf
- Institute of Human Genetics, Helmholtz Zentrum München, 85764 Neuherberg, Germany
- Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität München, 81675 München, Germany
| | - Thomas Schwarzmayr
- Institute of Human Genetics, Helmholtz Zentrum München, 85764 Neuherberg, Germany
- Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität München, 81675 München, Germany
| | - Caterina Terrile
- Institute of Human Genetics, Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | - Eliška Koňaříková
- Institute of Human Genetics, Helmholtz Zentrum München, 85764 Neuherberg, Germany
- Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität München, 81675 München, Germany
| | - Birgit Repp
- Institute of Human Genetics, Helmholtz Zentrum München, 85764 Neuherberg, Germany
- Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität München, 81675 München, Germany
| | - Gabi Kastenmüller
- Institute of Bioinformatics and Systems Biology, Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | - Jerzy Adamski
- Institute of Experimental Genetics, Genome Analysis Center, Helmholtz Zentrum München, German Research Center for Environmental Health, 85764 Neuherberg, Germany
| | - Peter Lichtner
- Institute of Human Genetics, Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | | | - Benoit Funalot
- INSERM U1163, Université Paris Descartes—Sorbonne Paris Cité, Institut Imagine, 75015 Paris, France
| | - Alice Donati
- Metabolic Unit, A. Meyer Children’s Hospital, 50139 Florence, Italy
| | - Valeria Tiranti
- Unit of Molecular Neurogenetics, Foundation IRCCS (Istituto di Ricovero e Cura a Carettere Scientifico) Neurological Institute ‘Carlo Besta’, 20126 Milan, Italy
| | - Anne Lombes
- Inserm UMR 1016, Institut Cochin, 75014 Paris, France
- CNRS UMR 8104, Institut Cochin, 75014 Paris, France
- Université Paris V René Descartes, Institut Cochin, 75014 Paris, France
| | - Claude Jardel
- Inserm UMR 1016, Institut Cochin, 75014 Paris, France
- AP/HP, GHU Pitié-Salpêtrière, Service de Biochimie Métabolique, 75013 Paris, France
| | - Dieter Gläser
- Genetikum, Genetic Counseling and Diagnostics, 89231 Neu-Ulm, Germany
| | - Robert W. Taylor
- Wellcome Centre for Mitochondrial Research, Institute of Neuroscience, Newcastle University, Newcastle upon Tyne NE2 4HH, UK
| | - Daniele Ghezzi
- Unit of Molecular Neurogenetics, Foundation IRCCS (Istituto di Ricovero e Cura a Carettere Scientifico) Neurological Institute ‘Carlo Besta’, 20126 Milan, Italy
| | - Johannes A. Mayr
- Department of Pediatrics, Paracelsus Medical University, A-5020 Salzburg, Austria
| | - Agnes Rötig
- INSERM U1163, Université Paris Descartes—Sorbonne Paris Cité, Institut Imagine, 75015 Paris, France
| | - Peter Freisinger
- Department of Pediatrics, Klinikum Reutlingen, 72764 Reutlingen, Germany
| | - Felix Distelmaier
- Department of General Pediatrics, Neonatology and Pediatric Cardiology, University Children’s Hospital, Heinrich-Heine-University Düsseldorf, 40225 Düsseldorf, Germany
| | - Tim M. Strom
- Institute of Human Genetics, Helmholtz Zentrum München, 85764 Neuherberg, Germany
- Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität München, 81675 München, Germany
| | - Thomas Meitinger
- Institute of Human Genetics, Helmholtz Zentrum München, 85764 Neuherberg, Germany
- Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität München, 81675 München, Germany
| | - Julien Gagneur
- Department of Informatics, Technische Universität München, 85748 Garching, Germany
- Quantitative Biosciences Munich, Gene Center, Department of Biochemistry, Ludwig Maximilian Universität München, 81377 München, Germany
| | - Holger Prokisch
- Institute of Human Genetics, Helmholtz Zentrum München, 85764 Neuherberg, Germany
- Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität München, 81675 München, Germany
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Sarig O, Sprecher E. The Molecular Revolution in Cutaneous Biology: Era of Next-Generation Sequencing. J Invest Dermatol 2017; 137:e79-e82. [PMID: 28411851 DOI: 10.1016/j.jid.2016.02.818] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Revised: 12/22/2015] [Accepted: 02/01/2016] [Indexed: 11/20/2022]
Abstract
Like any true conceptual revolution, next-generation sequencing (NGS) has not only radically changed research and clinical practice, it has also modified scientific culture. With the possibility to investigate DNA contents of any organism and in any context, including in somatic disorders or in tissues carrying complex microbial populations, it initially seemed as if the genetic underpinning of any biological phenomenon could now be deciphered in an almost streamlined fashion. However, over the past recent years, we have once again come to understand that there is no such a thing as great opportunities without great challenges. The steadily expanding use of NGS and related applications is now facing biologists and physicians with novel technological obstacles, analytical hurdles and increasingly pressing ethical questions.
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Affiliation(s)
- Ofer Sarig
- Department of Dermatology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Eli Sprecher
- Department of Dermatology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel; Department of Human Molecular Genetics & Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
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45
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Schuelke M, Øien NC, Oldfors A. Myopathology in the times of modern genetics. Neuropathol Appl Neurobiol 2017; 43:44-61. [DOI: 10.1111/nan.12374] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Revised: 12/03/2016] [Accepted: 12/23/2016] [Indexed: 12/14/2022]
Affiliation(s)
- M. Schuelke
- Department of Neuropediatrics and NeuroCure Clinical Research Center; Charité-Universitätsmedizin; Berlin Germany
| | - N. C. Øien
- Department of Neuropediatrics and NeuroCure Clinical Research Center; Charité-Universitätsmedizin; Berlin Germany
- Max-Delbrück-Center for Molecular Medicine; Berlin Germany
| | - A. Oldfors
- Department of Pathology and Genetics; Institute of Biomedicine; University of Gothenburg; Gothenburg Sweden
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46
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Autosomal dominant cutis laxa with progeroid features due to a novel, de novo mutation in ALDH18A1. J Hum Genet 2017; 62:661-663. [DOI: 10.1038/jhg.2017.18] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Revised: 12/28/2016] [Accepted: 01/23/2017] [Indexed: 12/17/2022]
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47
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Comparative and evolutionary studies of ALDH18A1 genes and proteins. Chem Biol Interact 2016; 276:2-8. [PMID: 27989597 DOI: 10.1016/j.cbi.2016.12.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Revised: 12/13/2016] [Accepted: 12/15/2016] [Indexed: 11/23/2022]
Abstract
Vertebrate ALDH18A1 genes encode a bifunctional mitochondrial enzyme, catalyzing a 2-step conversion of glutamate to glutamyl semialdehyde, subsequently converted into proline, ornithine and arginine. Bioinformatic analyses of vertebrate and invertebrate genomes were undertaken using known ALDH18A1 amino acid sequences. G5K (glutamyl kinase) and GPR (glutamyl phosphate reductase) domain sequences were identified for all vertebrate and invertebrate genomes examined, whereas bacterial sequences encoded separate enzymes. Vertebrate ALDH18A1 (also called P5CS) sequences were highly conserved throughout vertebrate evolution. A mechanism for generating two major vertebrate ALDH18A1 isoforms is proposed with 'a' isoform containing Asn239-Val240 with wide tissue expression, whereas the 'b' isoform lacking the dipeptide has been reported in gut tissues. Phylogenetic analyses describe the relationships and potential origins of the ALDH18A1 gene during vertebrate and invertebrate evolution and a proposal for generating the bifunctional vertebrate and invertebrate ALDH18A1 gene from a bacterial operon (proBA) encoding G5K and GPR. A more recent Aldh18a1 gene duplication event has apparently occurred with a primordial rat genome.
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Thompson K, Majd H, Dallabona C, Reinson K, King MS, Alston CL, He L, Lodi T, Jones SA, Fattal-Valevski A, Fraenkel ND, Saada A, Haham A, Isohanni P, Vara R, Barbosa IA, Simpson MA, Deshpande C, Puusepp S, Bonnen PE, Rodenburg RJ, Suomalainen A, Õunap K, Elpeleg O, Ferrero I, McFarland R, Kunji ERS, Taylor RW. Recurrent De Novo Dominant Mutations in SLC25A4 Cause Severe Early-Onset Mitochondrial Disease and Loss of Mitochondrial DNA Copy Number. Am J Hum Genet 2016; 99:860-876. [PMID: 27693233 PMCID: PMC5065686 DOI: 10.1016/j.ajhg.2016.08.014] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Accepted: 08/18/2016] [Indexed: 11/26/2022] Open
Abstract
Mutations in SLC25A4 encoding the mitochondrial ADP/ATP carrier AAC1 are well-recognized causes of mitochondrial disease. Several heterozygous SLC25A4 mutations cause adult-onset autosomal-dominant progressive external ophthalmoplegia associated with multiple mitochondrial DNA deletions, whereas recessive SLC25A4 mutations cause childhood-onset mitochondrial myopathy and cardiomyopathy. Here, we describe the identification by whole-exome sequencing of seven probands harboring dominant, de novo SLC25A4 mutations. All affected individuals presented at birth, were ventilator dependent and, where tested, revealed severe combined mitochondrial respiratory chain deficiencies associated with a marked loss of mitochondrial DNA copy number in skeletal muscle. Strikingly, an identical c.239G>A (p.Arg80His) mutation was present in four of the seven subjects, and the other three case subjects harbored the same c.703C>G (p.Arg235Gly) mutation. Analysis of skeletal muscle revealed a marked decrease of AAC1 protein levels and loss of respiratory chain complexes containing mitochondrial DNA-encoded subunits. We show that both recombinant AAC1 mutant proteins are severely impaired in ADP/ATP transport, affecting most likely the substrate binding and mechanics of the carrier, respectively. This highly reduced capacity for transport probably affects mitochondrial DNA maintenance and in turn respiration, causing a severe energy crisis. The confirmation of the pathogenicity of these de novo SLC25A4 mutations highlights a third distinct clinical phenotype associated with mutation of this gene and demonstrates that early-onset mitochondrial disease can be caused by recurrent de novo mutations, which has significant implications for the application and analysis of whole-exome sequencing data in mitochondrial disease.
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Affiliation(s)
- Kyle Thompson
- Wellcome Trust Centre for Mitochondrial Research, Institute of Neuroscience, Newcastle University, Newcastle upon Tyne NE2 4HH, UK
| | - Homa Majd
- The Medical Research Council, Mitochondrial Biology Unit, Cambridge Biomedical Campus, Wellcome Trust/MRC Building, Hills Road, Cambridge CB2 0XY, UK
| | - Cristina Dallabona
- Department of Life Sciences, University of Parma, Parco Area delle Scienze 11A, Parma 43124, Italy
| | - Karit Reinson
- Department of Pediatrics, Institute of Clinical Medicine, University of Tartu, 51014 Tartu, Estonia; Department of Genetics, United Laboratories, Tartu University Hospital, 51014 Tartu, Estonia
| | - Martin S King
- The Medical Research Council, Mitochondrial Biology Unit, Cambridge Biomedical Campus, Wellcome Trust/MRC Building, Hills Road, Cambridge CB2 0XY, UK
| | - Charlotte L Alston
- Wellcome Trust Centre for Mitochondrial Research, Institute of Neuroscience, Newcastle University, Newcastle upon Tyne NE2 4HH, UK
| | - Langping He
- Wellcome Trust Centre for Mitochondrial Research, Institute of Neuroscience, Newcastle University, Newcastle upon Tyne NE2 4HH, UK
| | - Tiziana Lodi
- Department of Life Sciences, University of Parma, Parco Area delle Scienze 11A, Parma 43124, Italy
| | - Simon A Jones
- Manchester Centre for Genomic Medicine, Central Manchester University Hospitals NHS Foundation Trust, St Marys Hospital, Oxford Road, Manchester M13 9WL, UK
| | - Aviva Fattal-Valevski
- Paediatric Neurology Unit, "Dana" Children Hospital, Tel Aviv Sourasky Medical Centre, Sackler Faculty of Medicine, Tel Aviv University, 64239 Tel Aviv, Israel
| | - Nitay D Fraenkel
- Department of Respiratory Rehabilitation, Alyn Hospital, Jerusalem 91090, Israel
| | - Ann Saada
- Metabolic Laboratory Department of Genetics and Metabolic Diseases, Hadassah-Hebrew University Medical Center, Jerusalem 91120, Israel
| | - Alon Haham
- Neonatal Intensive Care Unit, "Lis" Maternity Hospital, Tel Aviv Sourasky Medical Centre, 64239 Tel Aviv, Israel
| | - Pirjo Isohanni
- Research Programs Unit, Molecular Neurology, Biomedicum-Helsinki, University of Helsinki, 00290 Helsinki, Finland; Department of Pediatric Neurology, Children's Hospital, Helsinki University Hospital and University of Helsinki, 00290 Helsinki, Finland
| | - Roshni Vara
- Department of Paediatric Inherited Metabolic Diseases, Evelina Children's Hospital, London SE1 7EH, UK
| | - Inês A Barbosa
- Division of Genetics and Molecular Medicine, King's College London School of Medicine, London SE1 9RY, UK
| | - Michael A Simpson
- Division of Genetics and Molecular Medicine, King's College London School of Medicine, London SE1 9RY, UK
| | - Charu Deshpande
- Clinical Genetics Unit, Guys and St Thomas' NHS Foundation Trust, London SE1 9RT, UK
| | - Sanna Puusepp
- Department of Pediatrics, Institute of Clinical Medicine, University of Tartu, 51014 Tartu, Estonia; Department of Genetics, United Laboratories, Tartu University Hospital, 51014 Tartu, Estonia
| | - Penelope E Bonnen
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Richard J Rodenburg
- Radboud Center for Mitochondrial Medicine, Department of Paediatrics, Translational Metabolic Laboratory, Radboud University Medical Centre, 6525 GA Nijmegen, the Netherlands
| | - Anu Suomalainen
- Research Programs Unit, Molecular Neurology, Biomedicum-Helsinki, University of Helsinki, 00290 Helsinki, Finland; Department of Neurosciences, Helsinki University Hospital and University of Helsinki, 00290 Helsinki, Finland
| | - Katrin Õunap
- Department of Pediatrics, Institute of Clinical Medicine, University of Tartu, 51014 Tartu, Estonia; Department of Genetics, United Laboratories, Tartu University Hospital, 51014 Tartu, Estonia
| | - Orly Elpeleg
- The Monique and Jacques Roboh Department of Genetic Research, Hadassah-Hebrew University Medical Center, Jerusalem 91120, Israel
| | - Ileana Ferrero
- Department of Life Sciences, University of Parma, Parco Area delle Scienze 11A, Parma 43124, Italy
| | - Robert McFarland
- Wellcome Trust Centre for Mitochondrial Research, Institute of Neuroscience, Newcastle University, Newcastle upon Tyne NE2 4HH, UK
| | - Edmund R S Kunji
- The Medical Research Council, Mitochondrial Biology Unit, Cambridge Biomedical Campus, Wellcome Trust/MRC Building, Hills Road, Cambridge CB2 0XY, UK
| | - Robert W Taylor
- Wellcome Trust Centre for Mitochondrial Research, Institute of Neuroscience, Newcastle University, Newcastle upon Tyne NE2 4HH, UK.
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49
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Dutta AK, Ekbote AV, Thomas N, Omprakash S, Danda S. De Barsy syndrome type B presenting with cardiac and genitourinary abnormalities. Clin Dysmorphol 2016; 25:190-1. [PMID: 27379772 DOI: 10.1097/mcd.0000000000000142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Atanu K Dutta
- Departments of aClinical Genetics bNeonatology, Christian Medical College, Vellore, India
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50
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Al-Bughaili M, Neuhann TM, Flöttmann R, Mundlos S, Spielmann M, Kornak U, Fischer-Zirnsak B. A de novo 1q23.3-q24.2 deletion combined with a GORAB missense mutation causes a distinctive phenotype with cutis laxa. J Hum Genet 2016; 62:325-328. [PMID: 27604556 DOI: 10.1038/jhg.2016.111] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 07/26/2016] [Accepted: 08/01/2016] [Indexed: 11/09/2022]
Abstract
Gerodermia osteodysplastica is a recessive segmental progeroid disorder mainly characterized by wrinkled skin, generalized connective tissue weakness, infantile onset osteoporosis and normal intelligence. Coding mutations in GORAB, localized on chromosome 1q24.2, are the cause of this disease. 1q24 deletions underlie a spectrum of disorders with intellectual disability and ear abnormalities as phenotypic hallmarks. Here we report on an individual from Azerbaijan originating from a non-consanguineous couple showing short stature, cutis laxa, frequent fractures, facial dysmorphism, cup-shaped ears and intellectual disability. Sanger sequencing of GORAB revealed the seemingly homozygous missense mutation p.Ser175Phe. This mutation was detected in a heterozygous state in the clinically unaffected mother, but was absent in the healthy father. We performed copy-number investigations by high-resolution array-CGH and PCR approaches and found an ~6 Mb de novo deletion spanning 1q23.3-q24.2 in the affected boy. This novel combination of genetic defects very well explains the phenotype that goes beyond the usual presentation of gerodermia osteodysplastica. Our data provide new insight into the phenotypic spectrum of 1q23-q25 deletions and shows that the combination with another pathogenic allele can lead to more severe clinical manifestations.
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Affiliation(s)
- Mohammed Al-Bughaili
- Institut fuer Medizinische Genetik und Humangenetik, Charité-Universitaetsmedizin Berlin, Berlin, Germany
| | | | - Ricarda Flöttmann
- Institut fuer Medizinische Genetik und Humangenetik, Charité-Universitaetsmedizin Berlin, Berlin, Germany
| | - Stefan Mundlos
- Institut fuer Medizinische Genetik und Humangenetik, Charité-Universitaetsmedizin Berlin, Berlin, Germany.,Max-Planck-Institut fuer Molekulare Genetik, FG Development & Disease, Berlin, Germany.,Berlin-Brandenburg Center for Regenerative Therapies, Charité-Universitaetsmedizin Berlin, Berlin, Germany
| | - Malte Spielmann
- Institut fuer Medizinische Genetik und Humangenetik, Charité-Universitaetsmedizin Berlin, Berlin, Germany.,Max-Planck-Institut fuer Molekulare Genetik, FG Development & Disease, Berlin, Germany
| | - Uwe Kornak
- Institut fuer Medizinische Genetik und Humangenetik, Charité-Universitaetsmedizin Berlin, Berlin, Germany.,Max-Planck-Institut fuer Molekulare Genetik, FG Development & Disease, Berlin, Germany.,Berlin-Brandenburg Center for Regenerative Therapies, Charité-Universitaetsmedizin Berlin, Berlin, Germany
| | - Björn Fischer-Zirnsak
- Institut fuer Medizinische Genetik und Humangenetik, Charité-Universitaetsmedizin Berlin, Berlin, Germany.,Max-Planck-Institut fuer Molekulare Genetik, FG Development & Disease, Berlin, Germany.,Berlin-Brandenburg Center for Regenerative Therapies, Charité-Universitaetsmedizin Berlin, Berlin, Germany
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