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He Y, Jia S, Dewan RK, Liao N. Novel mutations in patients with hereditary red blood cell membrane disorders using next-generation sequencing. Gene 2017; 627:556-562. [PMID: 28694211 DOI: 10.1016/j.gene.2017.07.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2017] [Accepted: 07/06/2017] [Indexed: 02/07/2023]
Abstract
To diagnose and investigate the genotype-phenotype relationship in intractable hereditary red blood cell (RBC) membrane cases, we have utilized next-generation sequencing (NGS) to develop a high-throughput, highly sensitive assay. Three unrelated families including 15 individuals were analysed with a panel interrogating 600 genes related to haematopathy disorders. Where possible, inheritance patterns of pathogenic mutations were determined by sequencing the relatives. We identified 2 novel mutations in ANK1 (Y216X and E142X) responsible for hereditary spherocytosis (HS) that were stop-gain single nucleotide variants (SNVs). Furthermore, a novel SPTA1 mutation (H54P) was identified; it is a nonsynonymous SNV and is associated with hereditary elliptocytosis (HE). In addition, patients who also carried erythropoiesis gene mutations showed more severe disease phenotype. The NGS panel provides a fast and accurate method for molecular diagnosis in patients with intractable hereditary RBC membrane disorders. An approach integrating medical history, clinical and molecular testing, and pedigree analysis is beneficial for these patients and families.
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Affiliation(s)
- Yunyan He
- Department of Pediatrics, The First Affiliated Hospital of Guangxi Medical University, N0.6, Shuangyong Road, Qingxiu District, Nanning, Guangxi Province 530021, PR China
| | - Siyuan Jia
- Guangxi Medical University, N0.22, Shuangyong Road, Qingxiu District, Nanning, Guangxi Province 530021, PR China
| | - Roma Kajal Dewan
- Guangxi Medical University, N0.22, Shuangyong Road, Qingxiu District, Nanning, Guangxi Province 530021, PR China
| | - Ning Liao
- Department of Pediatrics, The First Affiliated Hospital of Guangxi Medical University, N0.6, Shuangyong Road, Qingxiu District, Nanning, Guangxi Province 530021, PR China.
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Da Costa L, Suner L, Galimand J, Bonnel A, Pascreau T, Couque N, Fenneteau O, Mohandas N. Diagnostic tool for red blood cell membrane disorders: Assessment of a new generation ektacytometer. Blood Cells Mol Dis 2015; 56:9-22. [PMID: 26603718 DOI: 10.1016/j.bcmd.2015.09.001] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Revised: 09/14/2015] [Accepted: 09/14/2015] [Indexed: 12/14/2022]
Abstract
Inherited red blood cell (RBC) membrane disorders, such as hereditary spherocytosis, elliptocytosis and hereditary ovalocytosis, result from mutations in genes encoding various RBC membrane and skeletal proteins. The RBC membrane, a composite structure composed of a lipid bilayer linked to a spectrin/actin-based membrane skeleton, confers upon the RBC unique features of deformability and mechanical stability. The disease severity is primarily dependent on the extent of membrane surface area loss. RBC membrane disorders can be readily diagnosed by various laboratory approaches that include RBC cytology, flow cytometry, ektacytometry, electrophoresis of RBC membrane proteins and genetics. The reference technique for diagnosis of RBC membrane disorders is the osmotic gradient ektacytometry. However, in spite of its recognition as the reference technique, this technique is rarely used as a routine diagnosis tool for RBC membrane disorders due to its limited availability. This may soon change as a new generation of ektacytometer has been recently engineered. In this review, we describe the workflow of the samples shipped to our Hematology laboratory for RBC membrane disorder analysis and the data obtained for a large cohort of French patients presenting with RBC membrane disorders using a newly available version of the ektacytomer.
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Affiliation(s)
- Lydie Da Costa
- AP-HP, Service d'Hématologie Biologique, Hôpital R. Debré, Paris F-75019, France; Univ Paris Diderot, Sorbonne Paris Cité, Paris F-75010, France; INSERM U1149, CRI, Faculté de Médecine Bichat-Claude Bernard, F-75019, France; Laboratoire d'Excellence GR-Ex, France.
| | - Ludovic Suner
- AP-HP, Service d'Hématologie Biologique, Hôpital R. Debré, Paris F-75019, France
| | - Julie Galimand
- AP-HP, Service d'Hématologie Biologique, Hôpital R. Debré, Paris F-75019, France
| | - Amandine Bonnel
- AP-HP, Service d'Hématologie Biologique, Hôpital R. Debré, Paris F-75019, France
| | - Tiffany Pascreau
- AP-HP, Service d'Hématologie Biologique, Hôpital R. Debré, Paris F-75019, France
| | - Nathalie Couque
- AP-HP, Département de Génétique, Hôpital R. Debré, Paris F-75019, France
| | - Odile Fenneteau
- AP-HP, Service d'Hématologie Biologique, Hôpital R. Debré, Paris F-75019, France
| | - Narla Mohandas
- Red Cell physiology laboratory, New York Blood Center (NYBC), New York, USA
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Da Costa L, Galimand J, Fenneteau O, Mohandas N. Hereditary spherocytosis, elliptocytosis, and other red cell membrane disorders. Blood Rev 2013; 27:167-78. [PMID: 23664421 DOI: 10.1016/j.blre.2013.04.003] [Citation(s) in RCA: 208] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Hereditary spherocytosis and elliptocytosis are the two most common inherited red cell membrane disorders resulting from mutations in genes encoding various red cell membrane and skeletal proteins. Red cell membrane, a composite structure composed of lipid bilayer linked to spectrin-based membrane skeleton is responsible for the unique features of flexibility and mechanical stability of the cell. Defects in various proteins involved in linking the lipid bilayer to membrane skeleton result in loss in membrane cohesion leading to surface area loss and hereditary spherocytosis while defects in proteins involved in lateral interactions of the spectrin-based skeleton lead to decreased mechanical stability, membrane fragmentation and hereditary elliptocytosis. The disease severity is primarily dependent on the extent of membrane surface area loss. Both these diseases can be readily diagnosed by various laboratory approaches that include red blood cell cytology, flow cytometry, ektacytometry, electrophoresis of the red cell membrane proteins, and mutational analysis of gene encoding red cell membrane proteins.
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Affiliation(s)
- Lydie Da Costa
- AP-HP, Service d'Hématologie Biologique, Hôpital R. Debré, Paris, F-75019, France.
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