1
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Feng J, Cui D, Li C, Yang Y, Li Q, Li X, Tan S, Li Z, Meng W, Li H, Zhang Y. The comprehensive analysis of thalassemia alleles (CATSA) based on single-molecule real-time technology (SMRT) is a more powerful strategy in the diagnosis of thalassemia caused by rare variants. Clin Chim Acta 2023; 551:117619. [PMID: 38375625 DOI: 10.1016/j.cca.2023.117619] [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: 06/14/2023] [Revised: 10/18/2023] [Accepted: 10/26/2023] [Indexed: 02/21/2024]
Abstract
Thalassemia is one of the most widely distributed monogenic disorders in the world and affects the largest number of people. It can manifest a wide spectrum of phenotypes from asymptomatic to fatal, which is associated with the degree of imbalance between α- and β-globin chains. Therefore, individuals with different genotypes could present with a similar phenotype. Genetic analysis is always needed to make a correct diagnosis. However, routine genetic analysis of thalassemia used in the Chinese population identifies only 23 common variants, resulting in many cases undiagnosed or being misdiagnosed. In this study, we applied a long-read sequencing-based approach termed comprehensive analysis of thalassemia alleles (CATSA) to 30 subjects whose hematologic screening results could not be explained by the routine genetic test results. The identification of additional variants and the correction of genotypes allowed the interpretation of the clinical phenotype in 24 subjects, which have been confirmed to be correct by independent experiments. Moreover, we identified a novel 8.4-kb deletion containing the entire HBB and HBD genes as well as part of the HBBP1 gene, expanding the genotype spectrum of β-thalassemia. CATSA showed a great advantage over other genetic tests in the diagnosis of thalassemia caused by rare variants.
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Affiliation(s)
- Jianjiang Feng
- Center for Medical Genetics, Jiangmen Maternal & Child Health Care Hospital, Jiangmen 529000, Guangdong, China
| | - Di Cui
- Berry Genomics Corporation, Beijing 102200, China
| | - Caipeng Li
- Center for Medical Genetics, Jiangmen Maternal & Child Health Care Hospital, Jiangmen 529000, Guangdong, China
| | - Yingsong Yang
- Center for Medical Genetics, Jiangmen Maternal & Child Health Care Hospital, Jiangmen 529000, Guangdong, China
| | - Qiuli Li
- Center for Medical Genetics, Jiangmen Maternal & Child Health Care Hospital, Jiangmen 529000, Guangdong, China
| | - Xiaomin Li
- Center for Medical Genetics, Jiangmen Maternal & Child Health Care Hospital, Jiangmen 529000, Guangdong, China
| | - Shuming Tan
- Center for Medical Genetics, Jiangmen Maternal & Child Health Care Hospital, Jiangmen 529000, Guangdong, China
| | - Zhiming Li
- Center for Medical Genetics, Jiangmen Maternal & Child Health Care Hospital, Jiangmen 529000, Guangdong, China
| | - Wanli Meng
- Berry Genomics Corporation, Beijing 102200, China
| | - Haoxian Li
- Center for Medical Genetics, Jiangmen Maternal & Child Health Care Hospital, Jiangmen 529000, Guangdong, China.
| | - Yanghui Zhang
- Center for Medical Genetics, Jiangmen Maternal & Child Health Care Hospital, Jiangmen 529000, Guangdong, China.
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2
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Feng J, Mao A, Lu Y, Shi H, Meng W, Liang C. Molecular characterization of a novel 83.9-kb deletion of the α-globin upstream regulatory elements by long-read sequencing. Blood Cells Mol Dis 2023; 103:102764. [PMID: 37336681 DOI: 10.1016/j.bcmd.2023.102764] [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: 12/05/2022] [Revised: 05/31/2023] [Accepted: 06/06/2023] [Indexed: 06/21/2023]
Abstract
Inherited deletions of upstream regulatory elements of α-globin genes give rise to α-thalassemia, which is an autosomal recessive monogenic disease. However, conventional thalassemia target diagnosis often fails to identify these rare deletions. Here we reported a family with two previous pregnancies of Hb Bart's hydrops fetalis and was seeking for prenatal diagnosis during the third pregnancy. Both parents had low level of Hemoglobin A2 indicating α-thalassemia. Conventional Gap-PCR and PCR-reverse dot blot showed the father carried -SEA deletion but did not identify any variants in the mother. Multiplex ligation-dependent probe amplification identified a deletion containing two HS-40 probes but could not determine the exact region. Finally, a long-read sequencing (LRS)-based approach directly identified that the exact deletion region was chr16: 48,642-132,584, which was located in the α-globin upstream regulatory elements and named (αα)JM after the Jiangmen city. Gap-PCR and Sanger sequencing confirmed the breakpoint. Both the mother and fetus from the third pregnancy carried heterozygous (αα)JM, and the fetus was normally delivered at gestational age of 39 weeks. This study demonstrated that LRS technology had great advantages over conventional target diagnosis methods for identifying rare thalassemia variants and assisted better carrier screening and prenatal diagnosis of thalassemia.
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Affiliation(s)
- Jianjiang Feng
- Center for Medical Genetics, Jiangmen Maternal & Child Health Care Hospital, Jiangmen 529000, Guangdong, China
| | - Aiping Mao
- Berry Genomics Corporation, Beijing 102200, China
| | - Ye Lu
- Center for Medical Genetics, Jiangmen Maternal & Child Health Care Hospital, Jiangmen 529000, Guangdong, China
| | - Haihong Shi
- Center for Medical Genetics, Jiangmen Maternal & Child Health Care Hospital, Jiangmen 529000, Guangdong, China
| | - Wanli Meng
- Berry Genomics Corporation, Beijing 102200, China
| | - Chen Liang
- Center for Medical Genetics, Jiangmen Maternal & Child Health Care Hospital, Jiangmen 529000, Guangdong, China.
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3
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Zhou M, Zhang C, Chen M, Hu Z, Li M, Li Z, Wu L, Liang D. A protospacer adjacent motif-free, multiplexed, and quantitative nucleic acid detection platform with barcode-based Cas12a activity. MedComm (Beijing) 2023; 4:e310. [PMID: 37405277 PMCID: PMC10315165 DOI: 10.1002/mco2.310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 05/20/2023] [Accepted: 05/22/2023] [Indexed: 07/06/2023] Open
Abstract
Clustered regularly interspaced short palindromic repeat (CRISPR)-based biosensors have been developed to facilitate the rapid and sensitive detection of nucleic acids. However, most approaches using CRISPR-based detection have disadvantages associated with the limitations of CRISPR RNA (crRNA), protospacer adjacent motif (PAM) or protospacer flanking sequence restriction, single channel detection, and difficulty in quantitative detection resulting in only some target sites being detected qualitatively. Here, we aimed to develop a barcode-based Cas12a-mediated DNA detection (BCDetection) strategy, which overcomes the aforementioned drawbacks and enables (1) detection with a universal PAM and crRNA without PAM or crRNA restriction, (2) simultaneous detection of multiple targets in a single reaction, and (3) quantitative detection, which can significantly distinguish copy number differences up to as low as a two-fold limit. We could efficiently and simultaneously detect three β-thalassemia mutations in a single reaction using BCDetection. Notably, samples from normal individuals, spinal muscular atrophy (SMA) carriers, and SMA patients were significantly and accurately distinguished using the quantitative detection ability of BCDetection, indicating its potential application in β-thalassemia and SMA carrier screening. Therefore, our findings demonstrate that BCDetection provides a new platform for accurate and efficient quantitative detection using CRISPR/Cas12a, highlighting its bioanalytical applications.
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Affiliation(s)
- Miaojin Zhou
- Center for Medical Genetics & Hunan Key Laboratory of Medical GeneticsSchool of Life SciencesCentral South UniversityChangshaHunanChina
| | - Chunhua Zhang
- Center for Medical Genetics & Hunan Key Laboratory of Medical GeneticsSchool of Life SciencesCentral South UniversityChangshaHunanChina
- Department of Medical GeneticsYunnan Maternal and Child Health Care HospitalKunmingYunnanChina
| | - Miaomiao Chen
- Center for Medical Genetics & Hunan Key Laboratory of Medical GeneticsSchool of Life SciencesCentral South UniversityChangshaHunanChina
| | - Zhiqing Hu
- Center for Medical Genetics & Hunan Key Laboratory of Medical GeneticsSchool of Life SciencesCentral South UniversityChangshaHunanChina
| | - Menglin Li
- Center for Medical Genetics & Hunan Key Laboratory of Medical GeneticsSchool of Life SciencesCentral South UniversityChangshaHunanChina
| | - Zhuo Li
- Center for Medical Genetics & Hunan Key Laboratory of Medical GeneticsSchool of Life SciencesCentral South UniversityChangshaHunanChina
| | - Lingqian Wu
- Center for Medical Genetics & Hunan Key Laboratory of Medical GeneticsSchool of Life SciencesCentral South UniversityChangshaHunanChina
| | - Desheng Liang
- Center for Medical Genetics & Hunan Key Laboratory of Medical GeneticsSchool of Life SciencesCentral South UniversityChangshaHunanChina
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4
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Unique Polymorphisms at BCL11A, HBS1L-MYB and HBB Loci Associated with HbF in Kuwaiti Patients with Sickle Cell Disease. J Pers Med 2021; 11:jpm11060567. [PMID: 34204365 PMCID: PMC8234980 DOI: 10.3390/jpm11060567] [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: 05/04/2021] [Revised: 06/12/2021] [Accepted: 06/14/2021] [Indexed: 11/16/2022] Open
Abstract
Patients with sickle cell disease (SCD) in Kuwait have elevated HbF levels ranging from ~10-44%; however, the modulating factors are unclear. We investigated the association of single nucleotide polymorphisms (SNPs) at BCL11A, HBS1L-MYB and HBB with HbF levels in 237 Kuwaiti SCD patients, divided into 3 subgroups according to their HbF levels. Illumina Ampliseq custom DNA panel was used for genotyping and confirmed by arrayed primer extension or Sanger sequencing. In the BCL11A locus, the CC genotype of rs7606173 [χ2 = 16.5] and (GG) of rs10195871 [χ2 = 15.0] were associated with Hb-F1 and HbF-2 subgroups, unlike rs1427404-T [χ2 = 17.3], which showed the highest association across the three subgroups. HBS1L-MYB locus revealed 2 previously-described SNPs (rs66650371 [χ2 = 9.5] and rs35795442 [χ2 = 9.2]) and 2 previously-unreported SNPs, (rs13220662 [χ2 = 6.2] and rs1406811 [χ2 = 6.7]) that were associated with the HbF-3 subgroup, making this the key locus elevating HbF to the highest levels. HBB cluster variants were associated with lower levels of HbF (β = -1.1). We report four previously-unpublished variants showing significant association with HbF. Each of the three quantitative trait loci affects HbF levels differently; unique SNPs, especially in HBS1L-MYB, elevate HbF to the highest levels.
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5
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Hu S, Zhan W, Wang J, Xie J, Zhou W, Yang X, Zeng Y, Hu T, Duan L, Chen K, Du L, Yin A, Luo M. Establishment and application of a novel method based on single nucleotide polymorphism analysis for detecting β-globin gene cluster deletions. Sci Rep 2020; 10:18298. [PMID: 33106596 PMCID: PMC7588424 DOI: 10.1038/s41598-020-75507-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Accepted: 10/12/2020] [Indexed: 12/03/2022] Open
Abstract
β-Globin gene mutations reduce or terminate the production of beta globin chains, of which approximately 10% are large deletions within the β-globin gene cluster. Because gene deletion leads to loss of heterozygosity at single nucleotide polymorphism (SNP), a novel method for detecting β-globin gene cluster deletions based on SNP heterozygosity analysis was established in this study. The location range of SNPs was selected according to the breakpoint of β-globin gene cluster deletions. SNPs were screened using bioinformatics analysis and population sequencing data. A novel method which enables genotyping of multiplex SNPs based on tetra-primer ARMS-PCR was designed and optimized. Forty clinical samples were tested in parallel by this method and MLPA to verify the performance of this method for detecting β-globin gene cluster deletion. Six informative SNPs were obtained, achieving heterozygote coverage of 93.3% in normal individuals. Genotyping of six SNPs were successfully integrated into two multiplex tetra-primer ARMS-PCR reactions. The sensitivity, specificity, positive predictive value and negative predictive value of the method for detecting β-globin gene cluster deletion were 100%, 96.30%, 92.86%, and 100%, respectively. This is a simple, cost-effective and novel method for detecting β-globin gene cluster deletions, which may be suitable for use in combination with MLPA for thalassemia molecular testing.
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Affiliation(s)
- Siqi Hu
- Medical Genetic Centre, Guangdong Women and Children's Hospital, Guangzhou Medical University, 521-523 Xingnan Avenue, Panyu District, Guangzhou, 511400, China.,Medical Genetics Center, Affiliated Shenzhen Maternity & Child Healthcare Hospital, Southern Medical University, Shenzhen, Guangdong, China
| | - Wenli Zhan
- Medical Genetic Centre, Guangdong Women and Children's Hospital, Guangzhou Medical University, 521-523 Xingnan Avenue, Panyu District, Guangzhou, 511400, China.,Medical Genetic Centre, Guangdong Women and Children Hospital, Guangzhou, China
| | - Jicheng Wang
- Medical Genetic Centre, Guangdong Women and Children's Hospital, Guangzhou Medical University, 521-523 Xingnan Avenue, Panyu District, Guangzhou, 511400, China.,Medical Genetic Centre, Guangdong Women and Children Hospital, Guangzhou, China
| | - Jia Xie
- Medical Genetic Centre, Guangdong Women and Children's Hospital, Guangzhou Medical University, 521-523 Xingnan Avenue, Panyu District, Guangzhou, 511400, China
| | - Weiping Zhou
- Medical Genetic Centre, Guangdong Women and Children's Hospital, Guangzhou Medical University, 521-523 Xingnan Avenue, Panyu District, Guangzhou, 511400, China.,Medical Genetic Centre, Guangdong Women and Children Hospital, Guangzhou, China
| | - Xiaohan Yang
- Medical Genetic Centre, Guangdong Women and Children's Hospital, Guangzhou Medical University, 521-523 Xingnan Avenue, Panyu District, Guangzhou, 511400, China.,Medical Genetic Centre, Guangdong Women and Children Hospital, Guangzhou, China
| | - Yukun Zeng
- Medical Genetic Centre, Guangdong Women and Children's Hospital, Guangzhou Medical University, 521-523 Xingnan Avenue, Panyu District, Guangzhou, 511400, China.,Medical Genetic Centre, Guangdong Women and Children Hospital, Guangzhou, China
| | - Tingting Hu
- Medical Genetic Centre, Guangdong Women and Children's Hospital, Guangzhou Medical University, 521-523 Xingnan Avenue, Panyu District, Guangzhou, 511400, China.,Medical Genetic Centre, Guangdong Women and Children Hospital, Guangzhou, China
| | - Lei Duan
- Medical Genetic Centre, Guangdong Women and Children's Hospital, Guangzhou Medical University, 521-523 Xingnan Avenue, Panyu District, Guangzhou, 511400, China
| | - Keyi Chen
- Medical Genetic Centre, Guangdong Women and Children's Hospital, Guangzhou Medical University, 521-523 Xingnan Avenue, Panyu District, Guangzhou, 511400, China.,Medical Genetic Centre, Guangdong Women and Children Hospital, Guangzhou, China
| | - Li Du
- Medical Genetic Centre, Guangdong Women and Children's Hospital, Guangzhou Medical University, 521-523 Xingnan Avenue, Panyu District, Guangzhou, 511400, China.,Medical Genetic Centre, Guangdong Women and Children Hospital, Guangzhou, China
| | - Aihua Yin
- Medical Genetic Centre, Guangdong Women and Children's Hospital, Guangzhou Medical University, 521-523 Xingnan Avenue, Panyu District, Guangzhou, 511400, China.,Medical Genetic Centre, Guangdong Women and Children Hospital, Guangzhou, China
| | - Mingyong Luo
- Medical Genetic Centre, Guangdong Women and Children's Hospital, Guangzhou Medical University, 521-523 Xingnan Avenue, Panyu District, Guangzhou, 511400, China. .,Medical Genetic Centre, Guangdong Women and Children Hospital, Guangzhou, China.
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6
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Lv W, Linpeng S, Li Z, Liang D, Jia Z, Meng D, Cram DS, Zhu H, Teng Y, Yin A, Wu L. Noninvasive prenatal diagnosis for pregnancies at risk for β-thalassaemia: a retrospective study. BJOG 2020; 128:448-457. [PMID: 32363759 DOI: 10.1111/1471-0528.16295] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/16/2020] [Indexed: 01/08/2023]
Abstract
OBJECTIVE To evaluate the clinical feasibility of noninvasive prenatal diagnosis (NIPD) for β-thalassaemia using circulating single molecule amplification and re-sequencing technology (cSMART). DESIGN Through carrier screening, 102 pregnant Chinese couples carrying pathogenic HBB gene variants were recruited to the study. Pregnancies were managed using traditional invasive prenatal diagnosis (IPD). Retrospectively, we evaluated the archived pregnancy plasma DNA by NIPD to evaluate the performance of our cSMART assay for fetal genotyping. SETTING Chinese prenatal diagnostic centres specialising in thalassaemia testing. POPULATION Chinese carrier couples at high genetic risk for β-thalassaemia. METHODS Fetal cell sampling was performed by amniocentesis and HBB genotypes were determined by reverse dot blot. NIPD was performed by a newly designed HBB cSMART assay and fetal genotypes were called by measuring the allelic ratios in the maternal cell-free DNA. MAIN OUTCOME MEASURES Concordance of HBB fetal genotyping between IPD and NIPD and the sensitivity and specificity of NIPD. RESULTS Invasive prenatal diagnosis identified 29 affected homozygotes or compound heterozygotes, 54 heterozygotes and 19 normal homozygotes. Compared with IPD results, 99 of 102 fetuses (97%) were correctly genotyped by our NIPD assay. Two of three discordant samples were false positives and the other sample involved an incorrect call of a heterozygote carrier as a homozygote normal. Overall, the sensitivity and specificity of our NIPD assay was 100% (95% CI 88.06-100.00%) and 97.26% (95% CI 90.45-99.67%), respectively. CONCLUSIONS This study demonstrates that our cSMART-based NIPD assay for β-thalassaemia has potential clinical utility as an alternative to IPD for pregnant HBB carrier couples. TWEETABLE ABSTRACT A new noninvasive test for pregnancies at risk for β-thalassaemia.
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Affiliation(s)
- W Lv
- Centre for Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, Hunan, China.,Hunan Jiahui Genetics Hospital, Changsha, Hunan, China
| | - S Linpeng
- Centre for Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, Hunan, China
| | - Z Li
- Centre for Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, Hunan, China
| | - D Liang
- Centre for Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, Hunan, China.,Hunan Jiahui Genetics Hospital, Changsha, Hunan, China
| | - Z Jia
- Prenatal Diagnosis Centre of Hunan Province, Hunan Provincial Maternal and Child Health Care Hospital, Changsha, Hunan, China
| | - D Meng
- Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi Zhuang Autonomous Region, China
| | - D S Cram
- Berry Genomics Corporation, Beijing, China
| | - H Zhu
- Centre for Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, Hunan, China
| | - Y Teng
- Hunan Jiahui Genetics Hospital, Changsha, Hunan, China
| | - A Yin
- Prenatal Diagnosis Centre, Guangdong Women and Children Hospital, Guangzhou, Guangdong, China
| | - L Wu
- Centre for Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, Hunan, China
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7
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[Improved patient safety through a clinical decision support system in laboratory medicine]. Internist (Berl) 2020; 61:452-459. [PMID: 32221627 DOI: 10.1007/s00108-020-00775-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
BACKGROUND Laboratory diagnostics are essential for diagnosis, initiation of therapy, and monitoring of patients. Laboratory results that are overlooked or incorrectly interpreted lead to adverse events and endanger patient safety. Clinical decision support systems (CDSSs) may facilitate appropriate interpretation of results and subsequent medical response. OBJECTIVES The research project on digital laboratory medicine (AMPEL) aims at developing a CDSS based on laboratory diagnostics, which supports practitioners in ensuring the necessary medical consequences. MATERIALS AND METHODS A literature review of CDSSs describes the current state of research. The research project AMPEL is presented with its objectives, challenges, and first results. Furthermore, the development of a framework and reporting system is illustrated through the clinical example of severe hypokalemia. RESULTS AND CONCLUSION Through interdisciplinary development and constant optimization, a specific CDSS with high acceptance among clinicians was developed. Initial results in the case of severe hypokalemia show a positive effect on patient care. Thereby, more complex frameworks such as sepsis diagnostics or acute coronary syndrome are implemented. The limited availability of standardized and digital clinical data is challenging. In addition to the application of classic decision trees in CDSS, the use of machine learning offers a promising perspective for future developments.
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8
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Zhang L, Zhang Q, Tang Y, Cong P, Ye Y, Chen S, Zhang X, Chen Y, Zhu B, Cai W, Chen S, Cai R, Guo X, Zhang C, Zhou Y, Zou J, Liu Y, Chen B, Yan S, Chen Y, Zhou Y, Ding H, Li X, Chen D, Zhong J, Shang X, Liu X, Qi M, Xu X. LOVD-DASH: A comprehensive LOVD database coupled with diagnosis and an at-risk assessment system for hemoglobinopathies. Hum Mutat 2019; 40:2221-2229. [PMID: 31286593 PMCID: PMC6899610 DOI: 10.1002/humu.23863] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 07/01/2019] [Accepted: 07/03/2019] [Indexed: 12/19/2022]
Abstract
Hemoglobinopathies are the most common monogenic disorders worldwide. Substantial effort has been made to establish databases to record complete mutation spectra causing or modifying this group of diseases. We present a variant database which couples an online auxiliary diagnosis and at-risk assessment system for hemoglobinopathies (DASH). The database was integrated into the Leiden Open Variation Database (LOVD), in which we included all reported variants focusing on a Chinese population by literature peer review-curation and existing databases, such as HbVar and IthaGenes. In addition, comprehensive mutation data generated by high-throughput sequencing of 2,087 hemoglobinopathy patients and 20,222 general individuals from southern China were also incorporated into the database. These sequencing data enabled us to observe disease-causing and modifier variants responsible for hemoglobinopathies in bulk. Currently, 371 unique variants have been recorded; 265 of 371 were described as disease-causing variants, whereas 106 were defined as modifier variants, including 34 functional variants identified by a quantitative trait association study of this high-throughput sequencing data. Due to the availability of a comprehensive phenotype-genotype data set, DASH has been established to automatically provide accurate suggestions on diagnosis and genetic counseling of hemoglobinopathies. LOVD-DASH will inspire us to deal with clinical genotyping and molecular screening for other Mendelian disorders.
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Affiliation(s)
- Li Zhang
- Department of Medical Genetics, Southern Medical University, Guangzhou, Guangdong, China.,Guangdong Technology and Engineering Research Center for Molecular Diagnostics of Human Genetic Diseases, Guangzhou, Guangdong, China.,Guangdong Key Laboratory of Biological Chip, Guangzhou, Guangdong, China
| | - Qianqian Zhang
- Department of Medical Genetics, Southern Medical University, Guangzhou, Guangdong, China.,Guangdong Technology and Engineering Research Center for Molecular Diagnostics of Human Genetic Diseases, Guangzhou, Guangdong, China.,Guangdong Key Laboratory of Biological Chip, Guangzhou, Guangdong, China
| | | | - Peikuan Cong
- Institute for Basic Medical Sciences, Westlake Institute for Advanced Study, Hangzhou, Zhejiang, China
| | - Yuhua Ye
- Department of Medical Genetics, Southern Medical University, Guangzhou, Guangdong, China.,Guangdong Technology and Engineering Research Center for Molecular Diagnostics of Human Genetic Diseases, Guangzhou, Guangdong, China.,Guangdong Key Laboratory of Biological Chip, Guangzhou, Guangdong, China
| | - Shiping Chen
- BGI Clinical Laboratories-Shenzhen, Shenzhen, Guangdong, China
| | - Xinhua Zhang
- Department of Hematopathology, 303rd Hospital of the People's Liberation Army, Nanning, Guangxi, China
| | - Yan Chen
- Department of Pediatrics, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Baosheng Zhu
- Genetic Diagnosis Center, First People's Hospital of Yunnan Province, Kunming, Yunnan, China
| | - Wangwei Cai
- School of Basic Medicine, Hainan Medical University, Haikou, Hainan, China
| | - Shaoke Chen
- Department of Pediatrics, Guangxi Zhuang Autonomous Region Women and Children Health Care Hospital, Nanning, Guangxi, China
| | - Ren Cai
- Department of Medical Genetics, Liuzhou Municipal Maternity and Child Healthcare Hospital, Liuzhou, Guangxi, China
| | - Xiaoling Guo
- Department of Pediatrics, Maternity and Child Health Care Hospital of Foshan City, Foshan, Guangdong, China
| | - Chonglin Zhang
- Department of Clinical Laboratory, Guilin Women and Children health care hospital, Guilin, Guangxi, China
| | - Yuqiu Zhou
- Department of Clinical Laboratory, Zhuhai Municipal Maternity and Child Healthcare Hospital, Zhuhai, Guangdong, China
| | - Jie Zou
- Department of Clinical Laboratory, Maternal and Child Health Hospital in Meizhou, Meizhou, Guangdong, China
| | - Yanhui Liu
- Department of Prenatal Diagnosis Center, Maternal and Child Health Hospital, Dongguan, Guangdong, China
| | - Biyan Chen
- Department of Clinical Laboratory, Baise Women and Children Care Hospital, Baise, Guangxi, China
| | - Shanhuo Yan
- Department of Clinical Laboratory, Qinzhou Maternal and Child Health Hospital, Qinzhou, Guangxi, China
| | - Yajun Chen
- Center For Prenatal Diagnosis Shaoguan, Shaoguan Municipal Maternity and Child Healthcare Hospital, Guangdong, China
| | - Yuehong Zhou
- Department of Clinical Laboratory, The People's Hospital of Yunfu City, Yunfu, Guangdong, China
| | - Hongmei Ding
- Department of Clinical Laboratory, Pingguo Women and Children Care Hospital, Baise, Guangxi, China
| | - Xiarong Li
- Beijing GeneDock Technology Company, Beijing, China
| | - Dianyu Chen
- School of Basic Medical Sciences, Zhejiang University, Hangzhou, Zhejiang, China
| | - Jianmei Zhong
- Department of Medical Genetics, Southern Medical University, Guangzhou, Guangdong, China.,Guangdong Technology and Engineering Research Center for Molecular Diagnostics of Human Genetic Diseases, Guangzhou, Guangdong, China.,Guangdong Key Laboratory of Biological Chip, Guangzhou, Guangdong, China
| | - Xuan Shang
- Department of Medical Genetics, Southern Medical University, Guangzhou, Guangdong, China.,Guangdong Technology and Engineering Research Center for Molecular Diagnostics of Human Genetic Diseases, Guangzhou, Guangdong, China.,Guangdong Key Laboratory of Biological Chip, Guangzhou, Guangdong, China
| | - Xuanzhu Liu
- Beijing GeneDock Technology Company, Beijing, China
| | - Ming Qi
- School of Basic Medical Sciences, Zhejiang University, Hangzhou, Zhejiang, China.,Center for Genetic & Genomic Medicine, JamesWatson Institute of Genome Sciences, Zhejiang University Medical School 1st Affiliated Hospital, Hangzhou, Zhejiang, China
| | - Xiangmin Xu
- Department of Medical Genetics, Southern Medical University, Guangzhou, Guangdong, China.,Guangdong Technology and Engineering Research Center for Molecular Diagnostics of Human Genetic Diseases, Guangzhou, Guangdong, China.,Guangdong Key Laboratory of Biological Chip, Guangzhou, Guangdong, China
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