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Yang EJ, Shim YJ, Kim HS, Lim YT, Im HJ, Koh KN, Kim H, Suh JK, Park ES, Lee NH, Choi YB, Hah JO, Lee JM, Han JW, Lee JH, Lee YH, Jung HL, Ha JS, Ki CS. Genetic Confirmation and Identification of Novel Variants for Glanzmann Thrombasthenia and Other Inherited Platelet Function Disorders: A Study by the Korean Pediatric Hematology Oncology Group (KPHOG). Genes (Basel) 2021; 12:genes12050693. [PMID: 34066320 PMCID: PMC8148153 DOI: 10.3390/genes12050693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Revised: 04/21/2021] [Accepted: 05/02/2021] [Indexed: 11/30/2022] Open
Abstract
The diagnosis of inherited platelet function disorders (IPFDs) is challenging owing to the unavailability of essential testing methods, including light transmission aggregometry and flow cytometry, in several medical centers in Korea. This study, conducted by the Korean Pediatric Hematology Oncology Group from March 2017 to December 2020, aimed to identify the causative genetic variants of IPFDs in Korean patients using next-generation sequencing (NGS). Targeted exome sequencing, followed by whole-genome sequencing, was performed for diagnosing IPFDs. Of the 11 unrelated patients with suspected IPFDs enrolled in this study, 10 patients and 2 of their family members were diagnosed with Glanzmann thrombasthenia (GT). The variant c.1913+5G>T of ITGB3 was the most common, followed by c.2333A>C (p.Gln778Pro) of ITGB2B. Known variants of GT, including c.917A>C (p.His306Pro) of ITGB3 and c.2975del (p.Glu992Glyfs*), c.257T>C (p.Leu86Pro), and c.1750C>T (p.Arg584*) of ITGA2B, were identified. Four novel variants of GT, c.1451G>T (p.Gly484Val) and c.1595G>T (p.Cys532Phe) of ITGB3 and c.1184G>T (p.Gly395Val) and c.2390del (p.Gly797Valfs*29) of ITGA2B, were revealed. The remaining patient was diagnosed with platelet type bleeding disorder 18 and harbored two novel RASGRP2 variants, c.1479dup (p.Arg494Alafs*54) and c.813+1G>A. We demonstrated the successful application of NGS for the accurate and differential diagnosis of heterogeneous IPFDs.
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Affiliation(s)
- Eu Jeen Yang
- Department of Pediatrics, Pusan National University School of Medicine, Pusan National University Children’s Hospital, Yangsan 50612, Korea; (E.J.Y.); (Y.T.L.)
| | - Ye Jee Shim
- Department of Pediatrics, Keimyung University School of Medicine, Keimyung University Dongsan Hospital, Daegu 42601, Korea
- Correspondence: ; Tel.: +82-53-258-7824
| | - Heung Sik Kim
- Department of Pediatrics, Keimyung University School of Medicine, Keimyung University Daegu Dongsan Hospital, Daegu 41931, Korea;
| | - Young Tak Lim
- Department of Pediatrics, Pusan National University School of Medicine, Pusan National University Children’s Hospital, Yangsan 50612, Korea; (E.J.Y.); (Y.T.L.)
| | - Ho Joon Im
- Department of Pediatrics, University of Ulsan College of Medicine, Asan Medical Center Children’s Hospital, Seoul 05505, Korea; (H.J.I.); (K.-N.K.); (H.K.)
| | - Kyung-Nam Koh
- Department of Pediatrics, University of Ulsan College of Medicine, Asan Medical Center Children’s Hospital, Seoul 05505, Korea; (H.J.I.); (K.-N.K.); (H.K.)
| | - Hyery Kim
- Department of Pediatrics, University of Ulsan College of Medicine, Asan Medical Center Children’s Hospital, Seoul 05505, Korea; (H.J.I.); (K.-N.K.); (H.K.)
| | - Jin Kyung Suh
- Department of Pediatrics, Korea Cancer Center Hospital, Seoul 01812, Korea;
| | - Eun Sil Park
- Department of Pediatrics, Gyeongsang National University College of Medicine, Gyeongsang National University Hospital, Jinju 52727, Korea;
| | - Na Hee Lee
- Department of Pediatrics, Cha Bundang Medical Center, Cha University, Seongnam 13496, Korea;
| | - Young Bae Choi
- Department of Pediatrics, Ajou University School of Medicine, Ajou University Hospital, Suwon 16499, Korea;
| | - Jeong Ok Hah
- Department of Pediatrics, Daegu Fatima Hospital, Daegu 41199, Korea;
| | - Jae Min Lee
- Department of Pediatrics, Yeungnam University College of Medicine, Daegu 42415, Korea;
| | - Jung Woo Han
- Department of Pediatrics, Yonsei University College of Medicine, Yonsei University Health System, Seoul 03722, Korea;
| | - Jae Hee Lee
- Department of Pediatrics, Chungbuk National University School of Medicine, Chungbuk National University Hospital, Cheongju 28644, Korea;
| | - Young-Ho Lee
- Department of Pediatrics, Hanyang University Seoul Hospital, Seoul 04763, Korea;
| | - Hye Lim Jung
- Deparment of Pediatrics, Sungkyunkwan University School of Medicine, Kangbuk Samsung Hospital, Seoul 03181, Korea;
| | - Jung-Sook Ha
- Department of Laboratory Medicine, Keimyung University School of Medicine, Keimyung University Dongsan Hospital, Daegu 42601, Korea;
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Park KJ, Chung HS, Lee KO, Park IA, Kim SH, Kim HJ. Novel and recurrent mutations of ITGA2B and ITGB3 genes in Korean patients with Glanzmann thrombasthenia. Pediatr Blood Cancer 2012; 59:335-8. [PMID: 22190468 DOI: 10.1002/pbc.24041] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2011] [Accepted: 11/14/2011] [Indexed: 11/09/2022]
Abstract
Glanzmann thrombasthenia (GT) is an autosomal recessive bleeding disorder caused by defective glycoprotein, αIIb and β3, encoded by ITGA2B and ITGB3 genes, respectively. We herein describe four unrelated Korean patients with genetically confirmed GT. Two patients were homozygous for c.1913+5G>T (IVS11+5G>T) mutation of ITGB3 with a signature of founder effect. The other two patients were compound heterozygous for two mutations of ITGA2B: c.[2333A>C];[2975delA] (p.[Q778P];[E992Gfs*30]) and c.[1750C>T];[2333A>C] (p.[R584X];[Q778P]). The c.2975delA mutation was a novel frameshift mutation of ITGA2B. Although from a limited number of patients, these results suggests c.1913+5G>T of ITGB3 is a recurrent mutation in Korean patients with GT.
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Affiliation(s)
- Kyoung-Jin Park
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Seoul, Korea
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