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Two Cases of the MYH9 Disorder Fechtner Syndrome Diagnosed from Observation of Peripheral Blood Cells before End-Stage Renal Failure. Case Rep Nephrol 2019; 2019:5149762. [PMID: 31885961 PMCID: PMC6899327 DOI: 10.1155/2019/5149762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2019] [Revised: 08/21/2019] [Accepted: 10/04/2019] [Indexed: 11/17/2022] Open
Abstract
As a MYH9 disorder, Fechtner syndrome is characterized by nephritis, giant platelets, granulocyte inclusion bodies (Döhle-like bodies), cataract, and sensorineural deafness. Observation of peripheral blood smear for the presence of thrombocytopenia, giant platelets, and granulocyte inclusion bodies (Döhle-like bodies) is highly important for the early diagnosis of MYH9 disorders. In our two cases, sequencing analysis of the MYH9 gene indicated mutations in exon 24. Both cases were diagnosed as the MYH9 disorders Fechtner syndrome before end-stage renal failure on the basis of the observation of peripheral blood smear.
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2
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Wang Z, Huang C, Sun Y, Lv H, Zhang M, Li X. Novel mutations associated with autosomal-dominant congenital cataract identified in Chinese families. Exp Ther Med 2019; 18:2701-2710. [PMID: 31555371 DOI: 10.3892/etm.2019.7865] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Accepted: 07/05/2019] [Indexed: 01/02/2023] Open
Abstract
As the leading cause of impaired vision, congenital cataracts, particularly autosomal dominant congenital cataract (ADCC), have been considered as a hereditary disease. The present study aimed to identify genetic defects in Chinese pedigrees with ADCC. A total of 6 Chinese families with ADCC were included, comprising 103 members and 27 patients assessed in total. Genomic DNA samples were extracted from the peripheral blood of probands; mutations were determined using a specific eye disease enrichment panel with next-generation sequencing. Following pathogenicity prediction, sites with notable pathogenicity were screened for further validation. Sanger sequencing was performed in the remaining individuals of the families and 100 normal controls. The pathogenic effects of the mutations, including amino acid substitutions, as well as structural and functional alterations of proteins linked to ADCC, were investigated via bioinformatics analysis. A total of seven mutations in six candidate genes associated with ADCC were identified in the 6 families: Myosin heavy chain 9 (MYH9) c.4150G>C, β-crystallin A4 (CRYBA4) c.169T>C, RPGR-interacting protein 1 (RPGRRIP1) c.2669G>A, wolframin (WFS1) c.1235T>C, CRYBA4 c.26C>T, Ephrin receptor subfamily 2 (EPHA2) c.2663+1G>A and paired box 6 (PAX6) c.11-2A>G. The seven mutations were only detected in affected individuals. Among them, there were three novel mutations (MYH9: c.4150G>C; CRYBA4: c.169T>C; RPGRRIP1: c.2669G>A) and four previously reported ones. Mutations in RPGRIP1 (c.2669G>A) and CRYBA4 (c.26C>T) were predicted to be benign according to bioinformatics analysis. Conversely, other mutations in EPHA2, PAX6, MYH9, CRYBA4 (c.169T>C) and WFS1 were determined to be pathogenic. The present study reported two novel heterozygous mutations (MYH9 c.4150G>C and CRYBA4 c.169T>C) identified by analyzing 6 Chinese families with ADCC, supporting their important roles in the development of the disease.
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Affiliation(s)
- Zhenyu Wang
- Department of Ophthalmology, Peking University Third Hospital, Beijing 100191, P.R. China.,Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Peking University Third Hospital, Beijing 100191, P.R. China
| | - Chen Huang
- Department of Ophthalmology, Peking University Third Hospital, Beijing 100191, P.R. China.,Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Peking University Third Hospital, Beijing 100191, P.R. China.,Medical Research Center, Peking University Third Hospital, Beijing 100191, P.R. China
| | - Yanxiu Sun
- Department of Ophthalmology, Peking University Third Hospital, Beijing 100191, P.R. China.,Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Peking University Third Hospital, Beijing 100191, P.R. China
| | - Huibin Lv
- Department of Ophthalmology, Peking University Third Hospital, Beijing 100191, P.R. China.,Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Peking University Third Hospital, Beijing 100191, P.R. China
| | - Mingzhou Zhang
- Department of Ophthalmology, Peking University Third Hospital, Beijing 100191, P.R. China.,Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Peking University Third Hospital, Beijing 100191, P.R. China
| | - Xuemin Li
- Department of Ophthalmology, Peking University Third Hospital, Beijing 100191, P.R. China.,Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Peking University Third Hospital, Beijing 100191, P.R. China
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Andres O, König EM, Althaus K, Bakchoul T, Bugert P, Eber S, Knöfler R, Kunstmann E, Manukjan G, Meyer O, Strauß G, Streif W, Thiele T, Wiegering V, Klopocki E, Schulze H. Use of Targeted High-Throughput Sequencing for Genetic Classification of Patients with Bleeding Diathesis and Suspected Platelet Disorder. TH OPEN 2018; 2:e445-e454. [PMID: 31249973 PMCID: PMC6524924 DOI: 10.1055/s-0038-1676813] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 11/19/2018] [Indexed: 02/07/2023] Open
Abstract
Inherited platelet disorders (IPD) form a rare and heterogeneous disease entity that is present in about 8% of patients with non-acquired bleeding diathesis. Identification of the defective cellular pathway is an important criterion for stratifying the patient's individual risk profile and for choosing personalized therapeutic options. While costs of high-throughput sequencing technologies have rapidly declined over the last decade, molecular genetic diagnosis of bleeding and platelet disorders is getting more and more suitable within the diagnostic algorithms. In this study, we developed, verified, and evaluated a targeted, panel-based next-generation sequencing approach comprising 59 genes associated with IPD for a cohort of 38 patients with a history of recurrent bleeding episodes and functionally suspected, but so far genetically undefined IPD. DNA samples from five patients with genetically defined IPD with disease-causing variants in
WAS
,
RBM8A
,
FERMT3
,
P2YR12
, and
MYH9
served as controls during the validation process. In 40% of 35 patients analyzed, we were able to finally detect 15 variants, eight of which were novel, in 11 genes,
ACTN1
,
AP3B1
,
GFI1B
,
HPS1
,
HPS4
,
HPS6
,
MPL
,
MYH9
,
TBXA2R
,
TPM4
, and
TUBB1
, and classified them according to current guidelines. Apart from seven variants of uncertain significance in 11% of patients, nine variants were classified as likely pathogenic or pathogenic providing a molecular diagnosis for 26% of patients. This report also emphasizes on potentials and pitfalls of this tool and prospectively proposes its rational implementation within the diagnostic algorithms of IPD.
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Affiliation(s)
- Oliver Andres
- University Children's Hospital, University of Würzburg, Würzburg, Germany
| | - Eva-Maria König
- Institute of Human Genetics, University of Würzburg, Würzburg, Germany
| | - Karina Althaus
- Centre for Clinical Transfusion Medicine, University Hospital of Tübingen, Tübingen, Germany.,Institute for Transfusion Medicine, University of Greifswald, Greifswald, Germany
| | - Tamam Bakchoul
- Centre for Clinical Transfusion Medicine, University Hospital of Tübingen, Tübingen, Germany.,Institute for Transfusion Medicine, University of Greifswald, Greifswald, Germany
| | - Peter Bugert
- DRK-Blutspendedienst Baden-Württemberg-Hessen, Institute for Transfusion Medicine and Immunology, Heidelberg University, Mannheim, Germany
| | - Stefan Eber
- University Children's Hospital, Technical University Munich, Munich, Germany
| | - Ralf Knöfler
- Department of Pediatrics, Carl Gustav Carus University Hospital, Dresden, Germany
| | - Erdmute Kunstmann
- Institute of Human Genetics, University of Würzburg, Würzburg, Germany
| | - Georgi Manukjan
- Institute of Experimental Biomedicine, University Hospital Würzburg, Würzburg, Germany
| | - Oliver Meyer
- Institute for Transfusion Medicine, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Gabriele Strauß
- Department for Pediatric Oncology and Hematology, HELIOS Klinikum Berlin-Buch, Berlin, Germany
| | - Werner Streif
- Department of Pediatrics, Medical University Innsbruck, Innsbruck, Austria
| | - Thomas Thiele
- Institute for Transfusion Medicine, University of Greifswald, Greifswald, Germany
| | - Verena Wiegering
- University Children's Hospital, University of Würzburg, Würzburg, Germany
| | - Eva Klopocki
- Institute of Human Genetics, University of Würzburg, Würzburg, Germany
| | - Harald Schulze
- Institute of Experimental Biomedicine, University Hospital Würzburg, Würzburg, Germany
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4
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Pecci A, Ma X, Savoia A, Adelstein RS. MYH9: Structure, functions and role of non-muscle myosin IIA in human disease. Gene 2018; 664:152-167. [PMID: 29679756 PMCID: PMC5970098 DOI: 10.1016/j.gene.2018.04.048] [Citation(s) in RCA: 177] [Impact Index Per Article: 29.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 04/13/2018] [Accepted: 04/16/2018] [Indexed: 12/16/2022]
Abstract
The MYH9 gene encodes the heavy chain of non-muscle myosin IIA, a widely expressed cytoplasmic myosin that participates in a variety of processes requiring the generation of intracellular chemomechanical force and translocation of the actin cytoskeleton. Non-muscle myosin IIA functions are regulated by phosphorylation of its 20 kDa light chain, of the heavy chain, and by interactions with other proteins. Variants of MYH9 cause an autosomal-dominant disorder, termed MYH9-related disease, and may be involved in other conditions, such as chronic kidney disease, non-syndromic deafness, and cancer. This review discusses the structure of the MYH9 gene and its protein, as well as the regulation and physiologic functions of non-muscle myosin IIA with particular reference to embryonic development. Moreover, the review focuses on current knowledge about the role of MYH9 variants in human disease.
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Affiliation(s)
- Alessandro Pecci
- Department of Internal Medicine, IRCCS Policlinico San Matteo Foundation, University of Pavia, Piazzale Golgi, 27100 Pavia, Italy.
| | - Xuefei Ma
- Laboratory of Molecular Cardiology, National Heart, Lung, and Blood Institute, National Institutes of Health, Bldg. 10 Room 6C-103B, 10 Center Drive, Bethesda, MD 20892-1583, USA.
| | - Anna Savoia
- Department of Medical Sciences, University of Trieste, via Dell'Istria, 65/1, I-34137 Trieste, Italy; IRCCS Burlo Garofolo, via Dell'Istria, 65/1, I-34137 Trieste, Italy.
| | - Robert S Adelstein
- Laboratory of Molecular Cardiology, National Heart, Lung, and Blood Institute, National Institutes of Health, Bldg. 10 Room 6C-103B, 10 Center Drive, Bethesda, MD 20892-1583, USA.
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Macrothrombocytopenia With Congenital Bilateral Cataracts: A Phenotype of MYH9 Disorder With Exon 24 Indel Mutations. J Pediatr Hematol Oncol 2018; 40:76-78. [PMID: 29200148 DOI: 10.1097/mph.0000000000000998] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
MYH9 disorder is characterized by large platelets and granulocyte inclusion bodies, and can be complicated with young-adult onsets of nephropathy, sensorineural hearing loss, and cataracts. Congenital cataracts in patients with MYH9 disorder is rare, and their etiology has not been elucidated. We report a 3-year-old patient with MYH9 disorder who had a p.E1066_A1072del mutation and developed cataracts congenitally. A review of the literature reveals that patients with an MYH9 exon 24 indel mutation, including p.E1066_A1072del, are susceptible to developing congenital cataracts and should be followed closely for other nonhematological complications.
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Miyazaki K, Koike Y, Kunishima S, Ishii R, Danbara M, Horie R, Yatomi Y, Higashihara M. Immature platelet fraction measurement is influenced by platelet size and is a useful parameter for discrimination of macrothrombocytopenia. Hematology 2015; 20:587-92. [DOI: 10.1179/1607845415y.0000000021] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Affiliation(s)
- Koji Miyazaki
- Department of Hematology, Kitasato University School of Medicine, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0374, Japan
| | - Yukako Koike
- Department of Clinical Laboratory, Toranomon Hospital, 2-2-2 Toranomon, Minato-ku, Tokyo 105-8470, Japan
| | - Shinji Kunishima
- Department of Advanced Diagnosis, Clinical Research Center, National Hospital Organization Nagoya Medical Center, 4-1-1 Sannomaru, Naka-ku, Nagoya, Aichi 460-0001, Japan
| | - Ryuji Ishii
- Department of Hematology, Kitasato University School of Medicine, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0374, Japan
| | - Mikio Danbara
- Department of Hematology, Kitasato University School of Medicine, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0374, Japan
| | - Ryouichi Horie
- Department of Hematology, Kitasato University School of Medicine, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0374, Japan
| | - Yutaka Yatomi
- Department of Clinical Laboratory, The University of Tokyo Hospital, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan
| | - Masaaki Higashihara
- Department of Hematology, Kitasato University School of Medicine, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0374, Japan
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Zhang S, Zhou X, Liu S, Bai T, Zhang Y, Wang J, Wang S, Zhang X, Wang B. MYH9-related disease: description of a large Chinese pedigree and a survey of reported mutations. Acta Haematol 2014; 132:193-8. [PMID: 24643058 DOI: 10.1159/000356681] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Accepted: 09/23/2013] [Indexed: 01/23/2023]
Abstract
We describe a large four-generational Chinese pedigree segregating MYH9 -related disease caused by a V1516L mutation. The clinical findings supported previously established genotype-phenotype correlations, and also demonstrated interindividual variability of disease manifestations even within the same family. The same mutation was previously reported in another Chinese pedigree but resulting from a different DNA substitution. Analyzing the patterns of previously reported mutations revealed a limited spectrum of pathogenic variants. The implications of this finding are discussed.
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8
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Kunishima S, Kitamura K, Matsumoto T, Sekine T, Saito H. Somatic mosaicism in MYH9 disorders: the need to carefully evaluate apparently healthy parents. Br J Haematol 2014; 165:885-7. [PMID: 24611568 DOI: 10.1111/bjh.12797] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shinji Kunishima
- Department of Advanced Diagnosis, Clinical Research Centre, National Hospital Organization Nagoya Medical Centre, Nagoya, Japan.
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De Rocco D, Zieger B, Platokouki H, Heller PG, Pastore A, Bottega R, Noris P, Barozzi S, Glembotsky AC, Pergantou H, Balduini CL, Savoia A, Pecci A. MYH9-related disease: five novel mutations expanding the spectrum of causative mutations and confirming genotype/phenotype correlations. Eur J Med Genet 2012; 56:7-12. [PMID: 23123319 PMCID: PMC3546164 DOI: 10.1016/j.ejmg.2012.10.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2012] [Accepted: 10/21/2012] [Indexed: 11/24/2022]
Abstract
MYH9-related disease (MYH9-RD) is a rare autosomal dominant syndromic disorder caused by mutations in MYH9, the gene encoding for the heavy chain of non-muscle myosin IIA (myosin-9). MYH9-RD is characterized by congenital macrothrombocytopenia and typical inclusion bodies in neutrophils associated with a variable risk of developing sensorineural deafness, presenile cataract, and/or progressive nephropathy. The spectrum of mutations responsible for MYH9-RD is limited. We report five families, each with a novel MYH9 mutation. Two mutations, p.Val34Gly and p.Arg702Ser, affect the motor domain of myosin-9, whereas the other three, p.Met847_Glu853dup, p.Lys1048_Glu1054del, and p.Asp1447Tyr, hit the coiled-coil tail domain of the protein. The motor domain mutations were associated with more severe clinical phenotypes than those in the tail domain.
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Affiliation(s)
- Daniela De Rocco
- Institute for Maternal and Child Health, IRCCS "Burlo Garofolo", Trieste, Italy
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10
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Jang MJ, Park HJ, Chong SY, Huh JY, Kim IH, Jang JH, Kim HJ, Oh D. A Trp33Arg mutation at exon 1 of the MYH9 gene in a Korean patient with May-Hegglin anomaly. Yonsei Med J 2012; 53:662-6. [PMID: 22477015 PMCID: PMC3343441 DOI: 10.3349/ymj.2012.53.3.662] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
In this report, we describe a Korean patient with May-Hegglin anomaly from a mutation of the MYH9 gene. The proband was a 21-year-old man with thrombocytopenia. He did not have a bleeding tendency. His neutrophil count was normal at 7490/mm³; however, the neutrophils contained abnormal basophilic inclusions in their cytoplasm. The platelet count was decreased at 15,000/mm³ with giant platelets. Coagulation test results were not remarkable. Direct sequencing of MYH9 revealed that he was heterozygous for a mutation in exon 1, which was a 97T>A substitution mutation affecting codon 33, substituting tryptophan with arginine (Trp33Arg). Family study showed that both of his parents had normal phenotype and genotypes, indicating a de novo occurrence of the mutation in the proband.
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Affiliation(s)
- Moon Ju Jang
- Department of Internal Medicine, School of Medicine, CHA University, Seongnam, Korea
| | - Hyun-Jeong Park
- Department of Internal Medicine, School of Medicine, CHA University, Seongnam, Korea
| | - So Young Chong
- Department of Internal Medicine, School of Medicine, CHA University, Seongnam, Korea
| | - Ji Young Huh
- Department of Laboratory Medicine, School of Medicine, CHA University, Seongnam, Korea
| | - In-Ho Kim
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Ja-Hyun Jang
- Department of Laboratory Medicine & Genetics, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Hee-Jin Kim
- Department of Laboratory Medicine & Genetics, Sungkyunkwan University School of Medicine, Seoul, Korea
- Cardiac and Vascular Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Doyeun Oh
- Department of Internal Medicine, School of Medicine, CHA University, Seongnam, Korea
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11
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Balduini CL, Pecci A, Savoia A. Recent advances in the understanding and management of MYH9-related inherited thrombocytopenias. Br J Haematol 2011; 154:161-74. [DOI: 10.1111/j.1365-2141.2011.08716.x] [Citation(s) in RCA: 142] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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13
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Non-muscle myosin II takes centre stage in cell adhesion and migration. Nat Rev Mol Cell Biol 2009; 10:778-90. [PMID: 19851336 DOI: 10.1038/nrm2786] [Citation(s) in RCA: 1401] [Impact Index Per Article: 93.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Non-muscle myosin II (NM II) is an actin-binding protein that has actin cross-linking and contractile properties and is regulated by the phosphorylation of its light and heavy chains. The three mammalian NM II isoforms have both overlapping and unique properties. Owing to its position downstream of convergent signalling pathways, NM II is central in the control of cell adhesion, cell migration and tissue architecture. Recent insight into the role of NM II in these processes has been gained from loss-of-function and mutant approaches, methods that quantitatively measure actin and adhesion dynamics and the discovery of NM II mutations that cause monogenic diseases.
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