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Iwaya C, Suzuki A, Shim J, Kim A, Iwata J. Craniofacial bone anomalies related to cholesterol synthesis defects. Sci Rep 2024; 14:5371. [PMID: 38438535 PMCID: PMC10912708 DOI: 10.1038/s41598-024-55998-3] [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: 07/30/2023] [Accepted: 02/29/2024] [Indexed: 03/06/2024] Open
Abstract
DHCR7 and SC5D are enzymes crucial for cholesterol biosynthesis, and mutations in their genes are associated with developmental disorders, which are characterized by craniofacial deformities. We have recently reported that a loss of either Dhcr7 or Sc5d results in a failure in osteoblast differentiation. However, it remains unclear to what extent a loss of function in either DHCR7 or SC5D affects craniofacial skeletal formation. Here, using micro computed tomography (μCT), we found that the bone phenotype differs in Dhcr7-/- and Sc5d-/- mice in a location-specific fashion. For instance, in Sc5d-/- mice, although craniofacial bones were overall affected, some bone segments, such as the anterior part of the premaxilla, the anterior-posterior length of the frontal bone, and the main body of the mandible, did not present significant differences compared to WT controls. By contrast, in Dhcr7-/- mice, while craniofacial bones were not much affected, the frontal bone was larger in width and volume, and the maxilla and palatine bone were hypoplastic, compared to WT controls. Interestingly the mandible in Dhcr7-/- mice was mainly affected at the condylar region, not the body. Thus, these results help us understand which bones and how greatly they are affected by cholesterol metabolism aberrations in Dhcr7-/- and Sc5d-/- mice.
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Affiliation(s)
- Chihiro Iwaya
- Department of Diagnostic and Biomedical Sciences, The University of Texas Health Science Center at Houston (UTHealth), School of Dentistry, 1941 East Road, BBS 4208, Houston, TX, 77054, USA
- Center for Craniofacial Research, The University of Texas Health Science Center at Houston, School of Dentistry, Houston, TX, 77054, USA
| | - Akiko Suzuki
- Department of Diagnostic and Biomedical Sciences, The University of Texas Health Science Center at Houston (UTHealth), School of Dentistry, 1941 East Road, BBS 4208, Houston, TX, 77054, USA
- Center for Craniofacial Research, The University of Texas Health Science Center at Houston, School of Dentistry, Houston, TX, 77054, USA
- University of Missouri - Kansas City, School of Dentistry, Kansas City, MO, 64108, USA
| | - Junbo Shim
- Department of Diagnostic and Biomedical Sciences, The University of Texas Health Science Center at Houston (UTHealth), School of Dentistry, 1941 East Road, BBS 4208, Houston, TX, 77054, USA
- Center for Craniofacial Research, The University of Texas Health Science Center at Houston, School of Dentistry, Houston, TX, 77054, USA
| | - Aemin Kim
- Department of Diagnostic and Biomedical Sciences, The University of Texas Health Science Center at Houston (UTHealth), School of Dentistry, 1941 East Road, BBS 4208, Houston, TX, 77054, USA
| | - Junichi Iwata
- Department of Diagnostic and Biomedical Sciences, The University of Texas Health Science Center at Houston (UTHealth), School of Dentistry, 1941 East Road, BBS 4208, Houston, TX, 77054, USA.
- Center for Craniofacial Research, The University of Texas Health Science Center at Houston, School of Dentistry, Houston, TX, 77054, USA.
- MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, Houston, TX, 77030, USA.
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Kiss RS, Chicoine J, Khalil Y, Sladek R, Chen H, Pisaturo A, Martin C, Dale JD, Brudenell TA, Kamath A, Kyei-Boahen J, Hafiane A, Daliah G, Alecki C, Hopes TS, Heier M, Aligianis IA, Lebrun JJ, Aspden J, Paci E, Kerksiek A, Lütjohann D, Clayton P, Wills JC, von Kriegsheim A, Nilsson T, Sheridan E, Handley MT. Comparative proximity biotinylation implicates the small GTPase RAB18 in sterol mobilization and biosynthesis. J Biol Chem 2023; 299:105295. [PMID: 37774976 PMCID: PMC10641524 DOI: 10.1016/j.jbc.2023.105295] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 09/14/2023] [Accepted: 09/17/2023] [Indexed: 10/01/2023] Open
Abstract
Loss of functional RAB18 causes the autosomal recessive condition Warburg Micro syndrome. To better understand this disease, we used proximity biotinylation to generate an inventory of potential RAB18 effectors. A restricted set of 28 RAB18 interactions were dependent on the binary RAB3GAP1-RAB3GAP2 RAB18-guanine nucleotide exchange factor complex. Twelve of these 28 interactions are supported by prior reports, and we have directly validated novel interactions with SEC22A, TMCO4, and INPP5B. Consistent with a role for RAB18 in regulating membrane contact sites, interactors included groups of microtubule/membrane-remodeling proteins, membrane-tethering and docking proteins, and lipid-modifying/transporting proteins. Two of the putative interactors, EBP and OSBPL2/ORP2, have sterol substrates. EBP is a Δ8-Δ7 sterol isomerase, and ORP2 is a lipid transport protein. This prompted us to investigate a role for RAB18 in cholesterol biosynthesis. We found that the cholesterol precursor and EBP-product lathosterol accumulates in both RAB18-null HeLa cells and RAB3GAP1-null fibroblasts derived from an affected individual. Furthermore, de novo cholesterol biosynthesis is impaired in cells in which RAB18 is absent or dysregulated or in which ORP2 expression is disrupted. Our data demonstrate that guanine nucleotide exchange factor-dependent Rab interactions are highly amenable to interrogation by proximity biotinylation and may suggest that Micro syndrome is a cholesterol biosynthesis disorder.
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Affiliation(s)
- Robert S Kiss
- Cardiovascular Health Across the Lifespan (CHAL) Program, Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada.
| | - Jarred Chicoine
- Metabolic Disorders and Complications (MEDIC) Program, Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - Youssef Khalil
- Genetics and Genomic Medicine, Great Ormond Street Institute of Child Health, University College London, London, United Kingdom
| | - Robert Sladek
- Metabolic Disorders and Complications (MEDIC) Program, Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - He Chen
- Cardiovascular Health Across the Lifespan (CHAL) Program, Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - Alessandro Pisaturo
- Cardiovascular Health Across the Lifespan (CHAL) Program, Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - Cyril Martin
- Cardiovascular Health Across the Lifespan (CHAL) Program, Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - Jessica D Dale
- Leeds Institute of Medical Research, St James's University Hospital, Leeds, United Kingdom
| | - Tegan A Brudenell
- Leeds Institute of Medical Research, St James's University Hospital, Leeds, United Kingdom
| | - Archith Kamath
- MRC Human Genetics Unit, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, United Kingdom; Division of Medical Sciences, University of Oxford, Oxford, United Kingdom
| | - Jeffrey Kyei-Boahen
- Department of Medicine, McGill University Health Centre, CHAL Research Program, Montreal, Canada
| | - Anouar Hafiane
- Department of Medicine, McGill University Health Centre, CHAL Research Program, Montreal, Canada
| | - Girija Daliah
- Department of Medicine, McGill University Health Centre, Cancer Research Program, Montreal, Canada
| | - Célia Alecki
- Department of Biochemistry, McGill University, Montreal, Quebec, Canada
| | - Tayah S Hopes
- Faculty of Biological Sciences, University of Leeds, Leeds, United Kingdom
| | - Martin Heier
- Department of Clinical Neuroscience for Children, Oslo University Hospital, Oslo, Norway
| | - Irene A Aligianis
- Medical and Developmental Genetics, Medical Research Council Human Genetics Unit, Edinburgh, United Kingdom
| | - Jean-Jacques Lebrun
- Department of Medicine, McGill University Health Centre, Cancer Research Program, Montreal, Canada
| | - Julie Aspden
- Faculty of Biological Sciences, University of Leeds, Leeds, United Kingdom
| | - Emanuele Paci
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, United Kingdom
| | - Anja Kerksiek
- Institute of Clinical Chemistry and Clinical Pharmacology, University Hospital Bonn, Bonn, Germany
| | - Dieter Lütjohann
- Institute of Clinical Chemistry and Clinical Pharmacology, University Hospital Bonn, Bonn, Germany
| | - Peter Clayton
- Genetics and Genomic Medicine, Great Ormond Street Institute of Child Health, University College London, London, United Kingdom
| | - Jimi C Wills
- Cancer Research United Kingdom Edinburgh Centre, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, United Kingdom; Firefinch Software Ltd, Edinburgh, United Kingdom
| | - Alex von Kriegsheim
- Cancer Research United Kingdom Edinburgh Centre, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, United Kingdom
| | - Tommy Nilsson
- Cancer Research Program (CRP), Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - Eamonn Sheridan
- Leeds Institute of Medical Research, St James's University Hospital, Leeds, United Kingdom
| | - Mark T Handley
- Leeds Institute of Medical Research, St James's University Hospital, Leeds, United Kingdom; Faculty of Biological Sciences, University of Leeds, Leeds, United Kingdom.
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Gowda VK, Srinivasan VM, Kinhal U. Lathosterolosis - A Rare Treatable Cause for Global Developmental Delay, Cataract, and Liver Dysfunction Masquerading as Galactosemia. Indian J Pediatr 2023; 90:837. [PMID: 37083887 DOI: 10.1007/s12098-023-04623-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Accepted: 04/13/2023] [Indexed: 04/22/2023]
Affiliation(s)
- Vykuntaraju K Gowda
- Department of Pediatric Neurology, Indira Gandhi Institute of Child Health, Near NIMHANS, Bengaluru, 560029, Karnataka, India.
| | - Varunvenkat M Srinivasan
- Department of Pediatric Neurology, Indira Gandhi Institute of Child Health, Near NIMHANS, Bengaluru, 560029, Karnataka, India
| | - Uddhav Kinhal
- Department of Pediatric Neurology, Indira Gandhi Institute of Child Health, Near NIMHANS, Bengaluru, 560029, Karnataka, India
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Söbü E, Kaya Özçora GD, Görükmez Ö, Şahinoğlu B. Lathosterolosis: a rare cholesterol metabolism disorder with a wide range of clinical variability. J Pediatr Endocrinol Metab 2023; 36:424-429. [PMID: 36607840 DOI: 10.1515/jpem-2022-0586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 12/30/2022] [Indexed: 01/07/2023]
Abstract
OBJECTIVES Lathosterolosis is a rare autosomal recessive congenital disease that occurs due to homozygous or compound heterozygous mutations in the sterol C5-desaturase (SC5D) gene. We report a male patient with biallelic missense variant detected in the SC5D gene. CASE PRESENTATION An eight-month-old male patient was referred to the department of paediatric neurology for status epilepticus. He had no remarkable dysmorphic features except micrognathia, ptotic ear and thin-stranded hair. Laboratory tests revealed an alanine aminotransferase level of 502 IU/L and an aspartate aminotransferase level of 279 IU/L; other biochemical test results were normal. The brain MRI revealed atrophic changes in both hemispheres. A decrease in the volume of brain stem and thin corpus callosum were noticeable. Whole exome sequencing was performed because of consanguineous marriage and sibling death in his medical history, and the encountered features were consistent with suspected neurometabolic disease in the cranial imaging and the presence of borderline psychomotor retardation. A biallelic missense variant, c.656T>C p.(Leu219Ser), was identified in the SC5D gene. CONCLUSIONS Lathosterolosis is a rare cholesterol metabolism disorder and can be presented with a wide range of clinical features by newly reported cases. Lathosterolosis should be considered in cases with cataracts, delayed neuromotor developmental milestones and high levels of liver enzymes.
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Affiliation(s)
- Elif Söbü
- Department of Pediatric Endocrinology, Kartal Dr. Lutfi Kirdar City Hospital Kartal, Istanbul, Türkiye
| | - Gül Demet Kaya Özçora
- Faculty of Medical Sciences Pediatric Neurology Department, Gaziantep Hasan Kalyoncu University, Gaziantep, Türkiye
| | - Özlem Görükmez
- Department of Medical Genetics, Bursa Yüksek İhtisas Training and Research Hospital, Bursa, Türkiye
| | - Bahtiyar Şahinoğlu
- Medical Genetics Department, Dr. Ersin Arslan Education and Research Hospital, Gaziantep, Türkiye
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5
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Kuwabara N, Ohta-Shimizu M, Fuwa F, Tomitsuka E, Sato S, Nakagawa S. Ergosterol increases 7-dehydrocholesterol, a cholesterol precursor, and decreases cholesterol in human HepG2 cells. Lipids 2022; 57:303-311. [PMID: 36098332 DOI: 10.1002/lipd.12357] [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: 03/18/2022] [Revised: 08/18/2022] [Accepted: 08/19/2022] [Indexed: 11/10/2022]
Abstract
Current treatment approaches for hyperlipidemia rely mainly on reducing the cholesterol level by inhibiting 3-hydroxy-3-methylglutaryl-CoA reductase (HMGCR), which is involved in the presqualene pathway of cholesterol biosynthesis. Finding a compound that instead targets the postsqualene pathway could aid in the treatment of hyperlipidemia and synergistically reduce the cholesterol level when used in conjunction with HMGCR inhibitors. Ergosterol is a fungal sterol that is converted to brassicasterol by 7-dehydrocholesterol reductase (DHCR7). DHCR7 is also a cholesterol biosynthesis enzyme, and thus ergosterol may cause the accumulation of 7-dehydrocholesterol, a precursor of cholesterol and vitamin D3 , by a competitive effect. In this study, we examined the effect of ergosterol on the postsqualene pathway by quantifying cholesterol precursors and related sterols using gas chromatography-mass spectrometry and by conducting quantitative RT-PCR and western blot analysis for human HepG2 hepatoma cells. We found that ergosterol is converted into brassicasterol by the action of DHCR7 from HepG2 cells and that it induced the accumulation of cholesterol precursors (lathosterol, 7-dehydrocholesterol, and desmosterol) and decreased the cholesterol level by altering the mRNA and protein levels of cholesterol biosynthesis enzymes (increase of sterol 8,7-isomerase [EBP] and decrease of DHCR7 and 24-dehydrocholesterol reductase [DHCR24]). These results demonstrate that ergosterol inhibits the postsqualene pathway and may be useful for the prevention of hyperlipidemia.
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Affiliation(s)
- Naoko Kuwabara
- Department of Bio-Analytical Chemistry, Niigata University of Pharmacy and Applied Life Sciences, Niigata, Japan
| | - Miho Ohta-Shimizu
- Department of Bio-Analytical Chemistry, Niigata University of Pharmacy and Applied Life Sciences, Niigata, Japan
| | - Fumiko Fuwa
- Department of Bio-Analytical Chemistry, Niigata University of Pharmacy and Applied Life Sciences, Niigata, Japan
| | - Eriko Tomitsuka
- Department of Health Chemistry, Niigata University of Pharmacy and Applied Sciences, Niigata, Japan
| | - Shinji Sato
- Department of Functional and Analytical Food Sciences, Niigata University of Pharmacy and Applied Life Sciences, Niigata, Japan
| | - Saori Nakagawa
- Department of Bio-Analytical Chemistry, Niigata University of Pharmacy and Applied Life Sciences, Niigata, Japan
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Sterol and lipid analyses identifies hypolipidemia and apolipoprotein disorders in autism associated with adaptive functioning deficits. Transl Psychiatry 2021; 11:471. [PMID: 34504056 PMCID: PMC8429516 DOI: 10.1038/s41398-021-01580-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 08/03/2021] [Accepted: 08/18/2021] [Indexed: 12/30/2022] Open
Abstract
An improved understanding of sterol and lipid abnormalities in individuals with autism spectrum disorder (ASD) could lead to personalized treatment approaches. Toward this end, in blood, we identified reduced synthesis of cholesterol in families with ≥2 children with ASD participating with the Autism Genetic Resource Exchange (AGRE), as well as reduced amounts of high-density lipoprotein cholesterol (HDL), apolipoprotein A1 (ApoA1) and apolipoprotein B (ApoB), with 19.9% of the subjects presenting with apolipoprotein patterns similar to hypolipidemic clinical syndromes and 30% with either or both ApoA1 and ApoB less than the fifth centile. Subjects with levels less than the fifth centile of HDL or ApoA1 or ApoA1 + ApoB had lower adaptive functioning than other individuals with ASD, and hypocholesterolemic subjects had apolipoprotein deficits significantly divergent from either typically developing individuals participating in National Institutes of Health or the National Health and Nutrition Examination Survey III.
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7
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Yaplito‐Lee J, Pai G, Hardikar W, Hong KM, Pitt J, Marum J, Amor DJ. Successful treatment of lathosterolosis: A rare defect in cholesterol biosynthesis-A case report and review of literature. JIMD Rep 2020; 56:14-19. [PMID: 33204591 PMCID: PMC7653246 DOI: 10.1002/jmd2.12158] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 07/27/2020] [Accepted: 07/29/2020] [Indexed: 12/05/2022] Open
Abstract
Lathosterolosis is a rare autosomal recessive disorder of cholesterol biosynthesis. It is caused by defects in the SC5D (sterol C5-desaturase) gene which encodes for the 3-beta-hydroxysteroid-delta-5-desaturase (also called sterol-C5-desaturase or lathosterol dehydrogenase). Only six cases have been described in the literature, but it is possible that a number of patients with milder forms of the condition might have been missed. Lathosterolosis manifests as microcephaly, bilateral cataracts, dysmorphism, limb anomalies, and developmental delay/intellectual disability. Liver involvement is variable and can range from normal liver function tests to portal fibrosis and cirrhosis. Diagnosis is made by demonstration of specific mutations in the SC5D gene and by plasma sterol analysis to confirm elevated lathosterol levels. In this report, we describe a girl with transaminitis in association with developmental delay/intellectual disability, facial dysmorphism, limb anomalies, and bilateral cataracts. Fibroscan showed severe liver fibrosis. Plasma sterol analysis and exome sequencing confirmed the diagnosis of lathosterolosis. Simvastatin treatment resulted in lowering of plasma lathosterol levels, improvement in transaminitis, and liver fibrosis grade, suggesting that children with this condition should be actively treated in order to prevent progression of liver disease.
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Affiliation(s)
- Joy Yaplito‐Lee
- Department of PaediatricsUniversity of MelbourneMelbourneVictoriaAustralia
- Department of Metabolic MedicineRoyal Children's HospitalMelbourneVictoriaAustralia
| | - Gautham Pai
- Department of Gastroenterology and Clinical NutritionRoyal Children's HospitalMelbourneVictoriaAustralia
| | - Winita Hardikar
- Department of PaediatricsUniversity of MelbourneMelbourneVictoriaAustralia
- Department of Gastroenterology and Clinical NutritionRoyal Children's HospitalMelbourneVictoriaAustralia
- Murdoch Children's Research InstituteUniversity of MelbourneMelbourneVictoriaAustralia
| | - Kai M. Hong
- Victorian Clinical Genetics ServicesMurdoch Children's Research InstituteMelbourneVictoriaAustralia
| | - James Pitt
- Department of PaediatricsUniversity of MelbourneMelbourneVictoriaAustralia
- Victorian Clinical Genetics ServicesMurdoch Children's Research InstituteMelbourneVictoriaAustralia
| | - Justine Marum
- Victorian Clinical Genetics ServicesMurdoch Children's Research InstituteMelbourneVictoriaAustralia
| | - David J. Amor
- Department of PaediatricsUniversity of MelbourneMelbourneVictoriaAustralia
- Murdoch Children's Research InstituteUniversity of MelbourneMelbourneVictoriaAustralia
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Lathosterolosis: An Extremely Rare Inherited Condition Associated With Progressive Liver Disease. J Pediatr Gastroenterol Nutr 2019; 69:e142-e145. [PMID: 31259789 DOI: 10.1097/mpg.0000000000002434] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
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9
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A gas chromatography–mass spectrometry-based whole-cell screening assay for target identification in distal cholesterol biosynthesis. Nat Protoc 2019; 14:2546-2570. [DOI: 10.1038/s41596-019-0193-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Accepted: 05/16/2019] [Indexed: 12/14/2022]
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10
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Anderson R, Rust S, Ashworth J, Clayton-Smith J, Taylor RL, Clayton PT, Morris AAM. Lathosterolosis: A Relatively Mild Case with Cataracts and Learning Difficulties. JIMD Rep 2018; 44:79-84. [PMID: 30097991 DOI: 10.1007/8904_2018_127] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 07/12/2018] [Accepted: 07/13/2018] [Indexed: 12/03/2022] Open
Abstract
Lathosterolosis is a rare defect of cholesterol synthesis. Only four previous cases have been reported, two of whom were siblings. We report a fifth patient, with a relatively mild phenotype. He presented at 5 years of age with bilateral posterior cataracts, which were managed with lensectomies and intraocular lens implants. He also had learning difficulties, with a full-scale IQ of 64 at 11 years of age. His head circumference is between the 0.4th and 2nd centiles, and he has mild hypotonia and subtle dysmorphism (a high-arched palate, anteverted nostrils, long philtrum and clinodactyly of toes). The diagnosis was established after sequencing a panel of genes associated with cataracts, which revealed compound heterozygous SC5D mutations: c.479C>G p.(Pro160Arg) and c.630C>A p.(Asp210Glu). The plasma lathosterol concentration was markedly raised at 219.8 μmol/L (control range 0.53-16.0), confirming the diagnosis. The c.630C>A p.(Asp210Glu) mutation has been reported in one previous patient, who also had a relatively mild phenotype (Ho et al., JIMD Rep 12:129-134, 2014). The mutation leads to a relatively conservative amino acid substitution, consistent with some residual enzyme activity. Our patient's family did not notice any benefit from treatment with simvastatin. In summary, milder patients with lathosterolosis may present with learning difficulties, cataracts and very subtle dysmorphism. The diagnosis will be missed unless plasma sterols are analysed or relevant genes sequenced.
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Affiliation(s)
- R Anderson
- Willink Metabolic Unit, Manchester Academic Health Sciences Centre, Manchester University Hospitals NHS Foundation Trust, Manchester, UK
| | - S Rust
- Paediatric Psychosocial Service, Manchester Academic Health Sciences Centre, Manchester University Hospitals NHS Foundation Trust, Manchester, UK
| | - J Ashworth
- Paediatric Ophthalmology Department, Manchester Academic Health Sciences Centre, Manchester University Hospitals NHS Foundation Trust, Manchester, UK
| | - J Clayton-Smith
- Genomic Medicine, Manchester Academic Health Sciences Centre, Manchester University Hospitals NHS Foundation Trust, Manchester, UK.,Division of Evolution and Genomic Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - R L Taylor
- Division of Evolution and Genomic Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - P T Clayton
- Centre for Translational Omics, Genetics and Genomic Medicine, UCL Institute of Child Health, London, UK
| | - A A M Morris
- Willink Metabolic Unit, Manchester Academic Health Sciences Centre, Manchester University Hospitals NHS Foundation Trust, Manchester, UK. .,Division of Evolution and Genomic Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK.
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11
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Corso G, Dello Russo A, Gelzo M. Liver and the defects of cholesterol and bile acids biosynthesis: Rare disorders many diagnostic pitfalls. World J Gastroenterol 2017; 23:5257-5265. [PMID: 28839426 PMCID: PMC5550775 DOI: 10.3748/wjg.v23.i29.5257] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2017] [Revised: 05/01/2017] [Accepted: 07/04/2017] [Indexed: 02/06/2023] Open
Abstract
In recent decades, biotechnology produced a growth of knowledge on the causes and mechanisms of metabolic diseases that have formed the basis for their study, diagnosis and treatment. Unfortunately, it is well known that the clinical features of metabolic diseases can manifest themselves with very different characteristics and escape early detection. Also, it is well known that the prognosis of many metabolic diseases is excellent if diagnosed and treated early. In this editorial we briefly summarized two groups of inherited metabolic diseases, the defects of cholesterol biosynthesis and those of bile acids. Both groups show variable clinical manifestations but some clinical signs and symptoms are common in both the defects of cholesterol and bile acids. The differential diagnosis can be made analyzing sterol profiles in blood and/or bile acids in blood and urine by chromatographic techniques (GC-MS and LC-MS/MS). Several defects of both biosynthetic pathways are treatable so early diagnosis is crucial. Unfortunately their diagnosis is made too late, due either to the clinical heterogeneity of the syndromes (severe, mild and very mild) that to the scarcity of scientific dissemination of these rare diseases. Therefore, the delay in diagnosis leads the patient to the medical observation when the disease has produced irreversible damages to the body. Here, we highlighted simple clinical and laboratory descriptions that can potentially make you to suspect a defect in cholesterol biosynthesis and/or bile acids, as well, we suggest appropriate request of the laboratory tests that along with common clinical features can help to diagnose these defects.
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12
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Vianey-Saban C, Acquaviva C, Cheillan D, Collardeau-Frachon S, Guibaud L, Pagan C, Pettazzoni M, Piraud M, Lamazière A, Froissart R. Antenatal manifestations of inborn errors of metabolism: biological diagnosis. J Inherit Metab Dis 2016; 39:611-624. [PMID: 27393412 DOI: 10.1007/s10545-016-9947-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Revised: 05/03/2016] [Accepted: 05/06/2016] [Indexed: 12/30/2022]
Abstract
Inborn errors of metabolism (IEMs) that present with abnormal imaging findings in the second half of pregnancy are mainly lysosomal storage disorders (LSDs), cholesterol synthesis disorders (CSDs), glycogen storage disorder type IV (GSD IV), peroxisomal disorders, mitochondrial fatty acid oxidation defects (FAODs), organic acidurias, aminoacidopathies, congenital disorders of glycosylation (CDGs), and transaldolase deficiency. Their biological investigation requires fetal material. The supernatant of amniotic fluid (AF) is useful for the analysis of mucopolysaccharides, oligosaccharides, sialic acid, lysosphingolipids and some enzyme activities for LSDs, 7- and 8-dehydrocholesterol, desmosterol and lathosterol for CSDs, acylcarnitines for FAODs, organic acids for organic acidurias, and polyols for transaldolase deficiency. Cultured AF or fetal cells allow the measurement of enzyme activities for most IEMs, whole-cell assays, or metabolite measurements. The cultured cells or tissue samples taken after fetal death can be used for metabolic profiling, enzyme activities, and DNA extraction. Fetal blood can also be helpful. The identification of vacuolated cells orients toward an LSD, and plasma is useful for diagnosing peroxisomal disorders, FAODs, CSDs, some LSDs, and possibly CDGs and aminoacidopathies. We investigated AF of 1700 pregnancies after exclusion of frequent etiologies of nonimmune hydrops fetalis and identified 108 fetuses affected with LSDs (6.3 %), 29 of them with mucopolysaccharidosis type VII (MPS VII), and six with GSD IV (0.3 %). In the AF of 873 pregnancies, investigated because of intrauterine growth restriction and/or abnormal genitalia, we diagnosed 32 fetuses affected with Smith-Lemli-Opitz syndrome (3.7 %).
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Affiliation(s)
- Christine Vianey-Saban
- Service Maladies Héréditaires du Métabolisme et Dépistage Néonatal, Centre de Biologie et de Pathologie Est CHU de Lyon, Lyon, France.
- Unité INSERM U1060 CarMeN Laboratory, University Lyon-1, Lyon, France.
| | - Cécile Acquaviva
- Service Maladies Héréditaires du Métabolisme et Dépistage Néonatal, Centre de Biologie et de Pathologie Est CHU de Lyon, Lyon, France
- UMR 5305 CNRS/UCBL, Lyon, France
| | - David Cheillan
- Service Maladies Héréditaires du Métabolisme et Dépistage Néonatal, Centre de Biologie et de Pathologie Est CHU de Lyon, Lyon, France
- Unité INSERM U1060 CarMeN Laboratory, University Lyon-1, Lyon, France
| | - Sophie Collardeau-Frachon
- Unité INSERM U1060 CarMeN Laboratory, University Lyon-1, Lyon, France
- Département de Pathologie, Centre de Biologie et de Pathologie Est CHU de Lyon, Lyon, France
| | - Laurent Guibaud
- Département d'Imagerie Pédiatrique et Fœtale, Hôpital Femme Mère Enfant CHU de Lyon, Lyon, France
| | - Cécile Pagan
- Service Maladies Héréditaires du Métabolisme et Dépistage Néonatal, Centre de Biologie et de Pathologie Est CHU de Lyon, Lyon, France
- Lyon Neuroscience Research Center, CNRS UMR5292; INSERM U1028, Université Claude Bernard Lyon 1, Lyon, France
| | - Magali Pettazzoni
- Service Maladies Héréditaires du Métabolisme et Dépistage Néonatal, Centre de Biologie et de Pathologie Est CHU de Lyon, Lyon, France
| | - Monique Piraud
- Service Maladies Héréditaires du Métabolisme et Dépistage Néonatal, Centre de Biologie et de Pathologie Est CHU de Lyon, Lyon, France
| | - Antonin Lamazière
- Département PM2, Plateforme de Métabolomique, Peptidomique et dosage de Médicaments, APHP, Hôpital Saint Antoine, Paris, France, Laboratoire de spectrométrie de masse, INSERM ERL 1157, CNRS UMR 7203 LBM, Sorbonne Universités-UPMC, Paris, France
| | - Roseline Froissart
- Service Maladies Héréditaires du Métabolisme et Dépistage Néonatal, Centre de Biologie et de Pathologie Est CHU de Lyon, Lyon, France
- UMR 5305 CNRS/UCBL, Lyon, France
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Gillespie RL, Urquhart J, Anderson B, Williams S, Waller S, Ashworth J, Biswas S, Jones S, Stewart F, Lloyd IC, Clayton-Smith J, Black GC. Next-generation Sequencing in the Diagnosis of Metabolic Disease Marked by Pediatric Cataract. Ophthalmology 2016; 123:217-20. [DOI: 10.1016/j.ophtha.2015.06.035] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 06/19/2015] [Accepted: 06/19/2015] [Indexed: 11/17/2022] Open
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Radiographic features of the skeleton in disorders of post-squalene cholesterol biosynthesis. Pediatr Radiol 2015; 45:965-76. [PMID: 25646736 DOI: 10.1007/s00247-014-3257-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Revised: 11/05/2014] [Accepted: 11/26/2014] [Indexed: 01/26/2023]
Abstract
Disorders of post-squalene cholesterol biosynthesis are inborn errors of metabolism characterised by multiple congenital abnormalities, including significant skeletal involvement. The most frequent and best-characterised example is the Smith-Lemli-Opitz syndrome. Nine other disorders are known, namely autosomal-recessive Antley-Bixler syndrome, Greenberg dysplasia, X-linked dominant chondrodysplasia punctata, X-linked recessive male emopamil-binding protein deficiency, CHILD syndrome, CK syndrome, sterol C4 methyloxidase-like deficiency, desmosterolosis and lathosterolosis. This study provides an overview of the radiologic features observed in these diseases. A common pattern of limb abnormalities is recognisable, including polydactyly, which is typically post-axial and rarely interdigital and can involve all four limbs, and syndactyly of the toes. Chondrodysplasia punctata is specifically associated with a subgroup of disorders of cholesterol biosynthesis (Greenberg dysplasia, CHILD syndrome, X-linked dominant chondrodysplasia punctata, male emopamil-binding protein deficiency). The possible occurrence of epiphyseal stippling in the Smith-Lemli-Opitz syndrome, initially reported, does not appear to be confirmed. Stippling is also associated with other congenital disorders such as chromosomal abnormalities, brachytelephalangic chondrodysplasia punctata (X-linked recessive chondrodysplasia punctata, disruptions of vitamin K metabolism, maternal autoimmune diseases), rhizomelic chondrodysplasia punctata (peroxisomal disorders) and lysosomal storage disorders. In the differential diagnosis of epiphyseal stippling, a moth-eaten appearance of bones, asymmetry, or presence of a common pattern of limb abnormalities indicate inborn errors of cholesterol biosynthesis. We highlight the specific differentiating radiologic features of disorders of post-squalene cholesterol biosynthesis.
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Platt FM, Wassif C, Colaco A, Dardis A, Lloyd-Evans E, Bembi B, Porter FD. Disorders of cholesterol metabolism and their unanticipated convergent mechanisms of disease. Annu Rev Genomics Hum Genet 2015; 15:173-94. [PMID: 25184529 DOI: 10.1146/annurev-genom-091212-153412] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Cholesterol plays a key role in many cellular processes, and is generated by cells through de novo biosynthesis or acquired from exogenous sources through the uptake of low-density lipoproteins. Cholesterol biosynthesis is a complex, multienzyme-catalyzed pathway involving a series of sequentially acting enzymes. Inherited defects in genes encoding cholesterol biosynthetic enzymes or other regulators of cholesterol homeostasis result in severe metabolic diseases, many of which are rare in the general population and currently without effective therapy. Historically, these diseases have been viewed as discrete disorders, each with its own genetic cause and distinct pathogenic cascades that lead to its specific clinical features. However, studies have recently shown that three of these diseases have an unanticipated mechanistic convergence. This surprising finding is not only shedding light on details of cellular cholesterol homeostasis but also suggesting novel approaches to therapy.
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Affiliation(s)
- Frances M Platt
- Department of Pharmacology, University of Oxford, Oxford OX1 3QT, United Kingdom;
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