1
|
Gupta S, Downie ML, Cheshire C, Dufek-Kamperis S, Levine AP, Brenchley P, Hoxha E, Stahl R, Ashman N, Pepper RJ, Mason S, Norman J, Bockenhauer D, Stanescu HC, Kleta R, Gale DP. A Genetic Risk Score Distinguishes Different Types of Autoantibody-Mediated Membranous Nephropathy. GLOMERULAR DISEASES 2023; 3:116-125. [PMID: 37090184 PMCID: PMC10116192 DOI: 10.1159/000529959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Accepted: 02/20/2023] [Indexed: 03/06/2023]
Abstract
Introduction Membranous nephropathy (MN) is the leading cause of nephrotic syndrome in adults and is characterized by detectable autoantibodies against glomerular antigens, most commonly phospholipase A2 receptor 1 (PLA2R1) and thrombospondin type-1 domain containing 7A (THSD7A). In Europeans, genetic variation in at least five loci, PLA2R1, HLA-DRB1, HLA-DQA1, IRF4, and NFKB1, affects the risk of disease. Here, we investigated the genetic risk differences between different autoantibody states. Methods 1,409 MN individuals were genotyped genome-wide with a dense SNV array. The genetic risk score (GRS) was calculated utilizing the previously identified European MN loci, and results were compared with 4,929 healthy controls and 422 individuals with steroid-sensitive nephrotic syndrome. Results GRS was calculated in the 759 MN individuals in whom antibody status was known. The GRS for MN was elevated in the anti-PLA2R1 antibody-positive (N = 372) compared with both the unaffected control (N = 4,929) and anti-THSD7A-positive (N = 31) groups (p < 0.0001 for both comparisons), suggesting that this GRS reflects anti-PLA2R1 MN. Among PLA2R1-positive patients, GRS was inversely correlated with age of disease onset (p = 0.009). Further, the GRS in the dual antibody-negative group (N = 355) was intermediate between controls and the PLA2R1-positive group (p < 0.0001). Conclusion We demonstrate that the genetic risk factors for PLA2R1- and THSD7A-antibody-associated MN are different. A higher GRS is associated with younger age of onset of disease. Further, a proportion of antibody-negative MN cases have an elevated GRS similar to PLA2R1-positive disease. This suggests that in some individuals with negative serology the disease is driven by autoimmunity against PLA2R1.
Collapse
Affiliation(s)
- Sanjana Gupta
- UCL Department of Renal Medicine, University College London, London, UK
| | | | - Chris Cheshire
- UCL Department of Renal Medicine, University College London, London, UK
| | | | - Adam Paul Levine
- UCL Department of Renal Medicine, University College London, London, UK
- Research Department of Pathology, University College London, London, UK
| | - Paul Brenchley
- Institute of Cardiovascular Sciences, University of Manchester, Manchester, UK
| | - Elion Hoxha
- Department of Internal Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Rolf Stahl
- Department of Internal Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Neil Ashman
- Department of Renal Medicine, Barts Health, London, UK
| | | | | | - Jill Norman
- UCL Department of Renal Medicine, University College London, London, UK
| | | | | | - Robert Kleta
- UCL Department of Renal Medicine, University College London, London, UK
| | | |
Collapse
|
2
|
Fan S, Wang Q, Wang AY, Zhang P, Zhong X, Chen S, Li G, Wang L, Wang W. The association between variants in PLA2R and HLA-DQA1 and renal outcomes in patients with primary membranous nephropathy in Western China. BMC Med Genomics 2021; 14:123. [PMID: 33964912 PMCID: PMC8105990 DOI: 10.1186/s12920-021-00969-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 04/27/2021] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Both Genome-wide associations and our previous study have shown that single nucleotide polymorphisms (SNPs) of M-type phospholipase A2 receptor (PLA2R) and human leukocyte antigen complex class II HLA-DQα-chain 1 (HLA-DQA1) gene were identified to be associated with primary membranous nephropathy (PMN). However, whether these SNPs affect clinical manifestation and renal outcome for PMN patients is poorly defined. Here, we evaluated whether there is an association between these SNPs and clinical manifestations and renal outcomes of PMN in a western Chinese cohort. METHODS Seven SNPs within PLA2R and one SNP in HLA-DQA1 were selected in our study. Clinical data from 314 patients with PMN were collected and the relationship between the genotype and phenotype was evaluated. A total of 186 patients had follow-up data. We assessed the treatment responses and renal outcomes between patients with these gene polymorphisms after a median follow-up of 18.6 months. RESULTS Eight SNPs were not associated with clinical manifestations of PMN patients (Pc < 0.05). rs3828323 T allele was marginally significantly associated with hypertension (P = 0.008, Pc = 0.064, OR = 1.821). After treatment for PMN, the SR group (including CR and PR) had lower serum creatinine level (68.4 ± 18.8 μmol/L vs. 122.8 ± 126.6 μmol/L, P < 0.001), urea (5.5 ± 1.9 mmol/L vs. 8.0 ± 4.0 mmol/L, P < 0.001), uric acid (358.5 ± 95.1 μmol/L vs. 392.8 ± 118.1 μmol/L, P = 0.037) and urinary protein (0.23 (0.76,1.05) g/d vs. 3.01 (2.06,7.95) g/d, P < 0.001), higher eGFR (100.0 ± 20.1 ml/min/1.73m2 vs. 77.1 ± 35.3 ml/min/1.73m2, P < 0.001) and albumin (41.1 ± 5.1 g/L vs.30.4 ± 8.2 g/L, P < 0.001). We also identified that PMN patients with CT/TT genotype for rs3828323 achieved higher cumulative survival rate than patients with CC genotype. CONCLUSIONS Rs3828323 may influence hypertension and renal outcome in patients with PMN. Further research is needed to explore the mechanism for this genotype-disease phenotype association.
Collapse
Affiliation(s)
- Shulei Fan
- Department of Nephrology and Institute of Nephrology, Sichuan Academy of Medical Science and Sichuan Provincial People’s Hospital, Chengdu, 610072 China
- Department of Respiratory Medicine, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Qiuxia Wang
- Department of Nephrology and Institute of Nephrology, Sichuan Academy of Medical Science and Sichuan Provincial People’s Hospital, Chengdu, 610072 China
| | - Amanda Y. Wang
- The Renal and Metabolic Division, The George Institute for Global Health, University of NSW, Sydney, Australia
- The Department of Renal Medicine, Concord Repatriation General Hospital, Concord, NSW Australia
- The Concord Clinical School, University of Sydney, Camperdown, Australia
| | - Ping Zhang
- Department of Nephrology and Institute of Nephrology, Sichuan Academy of Medical Science and Sichuan Provincial People’s Hospital, Chengdu, 610072 China
| | - Xiang Zhong
- Department of Nephrology and Institute of Nephrology, Sichuan Academy of Medical Science and Sichuan Provincial People’s Hospital, Chengdu, 610072 China
| | - Shasha Chen
- Department of Nephrology and Institute of Nephrology, Sichuan Academy of Medical Science and Sichuan Provincial People’s Hospital, Chengdu, 610072 China
| | - Guisen Li
- Department of Nephrology and Institute of Nephrology, Sichuan Academy of Medical Science and Sichuan Provincial People’s Hospital, Chengdu, 610072 China
| | - Li Wang
- Department of Nephrology and Institute of Nephrology, Sichuan Academy of Medical Science and Sichuan Provincial People’s Hospital, Chengdu, 610072 China
| | - Wei Wang
- Department of Nephrology and Institute of Nephrology, Sichuan Academy of Medical Science and Sichuan Provincial People’s Hospital, Chengdu, 610072 China
| |
Collapse
|
3
|
Vahedi SM, Nikbakht G, Jamshidi S, Lankarani L, Alimi N, Esmailnejad A. Association between DLA-DRB1.2 allelic diversity and development of mammary gland tumors in dogs. Acta Vet Scand 2019; 61:55. [PMID: 31727096 PMCID: PMC6857217 DOI: 10.1186/s13028-019-0491-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 11/04/2019] [Indexed: 01/12/2023] Open
Abstract
Background The major histocompatibility complex (MHC) is the best-characterized genetic region related to resistance/susceptibility to a wide range of infectious and immune-mediated diseases. Evidences suggest that MHC class II genes may play an important role in developing different types of tumors including breast cancer. Canine mammary gland tumors (CMTs) are the most common neoplasms in female dogs. In the current study, the association of canine MHC class II DLA-DRB1.2 genotypes with development of mammary gland tumor profiles in dogs was investigated. DLA-DRB1.2 allelic diversity was determined in 40 dogs (18 CMT cases and 22 controls) using HRM technique and DNA sequencing. Association of the DLA-DRB1.2 genotypes with CMT profiles was expressed as odds ratio (OR). Results Based on the histopathological typing of tumors, CMT cases were categorized into 4 groups: simple carcinoma, complex carcinoma, carcinoma arising in a benign tumor and special types of carcinoma. A total of eight HRM profiles (A to H) were identified in dogs sampled. The association study revealed a significant correlation between DLA-DRB1.2 genotypes with different CMT profiles. The E genotype was significantly associated with increased risk of carcinoma arising in a benign tumor, and the B genotype represented a positive correlation with complex carcinoma. Significant association was also observed between the heterozygosity of DLA-DRB1.2 genotypes and decreased risk of developing tumor in dogs. Conclusions These results provide additional support for the association between DLA-DRB1 genes and development of mammary gland tumors in dogs and could potentially be used for early diagnosis of neoplasia and identifying susceptible dogs.
Collapse
|
4
|
Gupta S, Köttgen A, Hoxha E, Brenchley P, Bockenhauer D, Stanescu HC, Kleta R. Genetics of membranous nephropathy. Nephrol Dial Transplant 2018; 33:1493-1502. [PMID: 29126273 PMCID: PMC6113634 DOI: 10.1093/ndt/gfx296] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Accepted: 09/12/2017] [Indexed: 12/22/2022] Open
Abstract
An HLA-DR3 association with membranous nephropathy (MN) was described in 1979 and additional evidence for a genetic component to MN was suggested in 1984 in reports of familial MN. In 2009, a pathogenic autoantibody was identified against the phospholipase A2 receptor 1 (PLA2R1). Here we discuss the genetic studies that have proven the association of human leucocyte antigen class II and PLA2R1 variants and disease in MN. The common variants in PLA2R1 form a haplotype that is associated with disease incidence. The combination of the variants in both genes significantly increases the risk of disease by 78.5-fold. There are important genetic ethnic differences in MN. Disease outcome is difficult to predict and attempts to correlate the genetic association to outcome have so far not been helpful in a reproducible manner. The role of genetic variants may not only extend beyond the risk of disease development, but can also help us understand the underlying molecular biology of the PLA2R1 and its resultant pathogenicity. The genetic variants identified thus far have an association with disease and could therefore become useful biomarkers to stratify disease risk, as well as possibly identifying novel drug targets in the near future.
Collapse
Affiliation(s)
- Sanjana Gupta
- University College London–Centre for Nephrology, London, UK
| | - Anna Köttgen
- Institute of Genetic Epidemiology, Medical Center and Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Elion Hoxha
- Medizinische Klinik und Poliklinik III, Universitätsklinikum Hamburg-Eppendorf, Hamburg, Germany
| | - Paul Brenchley
- Institute of Cardiovascular Sciences, University of Manchester, Manchester, UK
| | | | | | - Robert Kleta
- University College London–Centre for Nephrology, London, UK
| |
Collapse
|
5
|
Qin XS, Liu JH, Lyu GT, Peng ML, Yang FN, Qin DC, Li YZ, Liu Y. Variants in the Promoter Region of HLA-DQA1 were Associated with Idiopathic Membranous Nephropathy in a Chinese Han Population. Chin Med J (Engl) 2017; 130:1677-1682. [PMID: 28685717 PMCID: PMC5520554 DOI: 10.4103/0366-6999.209884] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Background: Idiopathic membranous nephropathy (IMN) is an autoimmune disease and the leading cause of adult nephritic syndrome. HLA-DQA1 had been identified to be associated with IMN in Europeans and the result was replicated in Chinese Han population. In this study, six single nucleotide polymorphisms (SNPs) in the promoter of HLA-DQA1 and other two SNPs with IgA nephropathy were included for the association analysis. Methods: The SNPs were genotyped in 509 patients and 601 controls by the MassArray iPLEX. The quantification of anti-phospholipase A2 receptor (PLA2R) antibodies in sera of IMN patients was performed by anti-PLA2R ELISA (IgG) kit. Results: After analysis, four SNPs were significantly associated with IMN, with rs2187668 and rs28383345 as the top two signals (P = 8.42×10-5 and 2.48×10-5, respectively). Even under dominant model, the two SNPs were still significantly associated with IMN (P = 3.50×10-3 for rs28383345 and P = 6.55×10-5 for rs2187668). After conditional study with rs2187668, rs28383345 was the only variant significantly correlated with IMN after Bonferroni correction (P = 0.016). The minor alleles of the two SNPs were also mutually exclusive in our cohort. This indicated that the two SNPs were independently associated with IMN in Chinese Han population. Levels of anti-PLA2R autoantibodies were correlated with the genotypes of the two SNPs, but not significantly (P>0.05). Conclusions: Our results revealed that a novel independent variant in the promoter of HLA-DQA1 was associated with IMN in Chinese Han population. The locus possessed regulatory role according to the data of RegulomeDB. The exact role of the SNPs on the expression of HLA-DQA1 needs further investigation.
Collapse
Affiliation(s)
- Xiao-Song Qin
- Department of Medical Laboratory, Shengjing Hospital of China Medical University, Shenyang, Liaoning 110011, China
| | - Jian-Hua Liu
- Department of Medical Laboratory, Shengjing Hospital of China Medical University, Shenyang, Liaoning 110011, China
| | - Guan-Ting Lyu
- Department of Blood Transfusion, Tangdu Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710038, China
| | - Meng-Le Peng
- Department of Medical Laboratory, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China
| | - Fu-Ning Yang
- Department of Rheumatology and Clinical Immunology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education, Beijing 100005, China
| | - Dong-Chun Qin
- Department of Medical Laboratory, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China
| | - Yong-Zhe Li
- Department of Rheumatology and Clinical Immunology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education, Beijing 100005, China
| | - Yong Liu
- Department of Medical Laboratory, Shengjing Hospital of China Medical University, Shenyang, Liaoning 110011, China
| |
Collapse
|
6
|
Zhang L, Zhao J, Cui G, Wang H, Wang DW. Genotyping on ALDH2: comparison of four different technologies. PLoS One 2015; 10:e0122745. [PMID: 25803854 PMCID: PMC4372573 DOI: 10.1371/journal.pone.0122745] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Accepted: 02/12/2015] [Indexed: 01/01/2023] Open
Abstract
Objectives This study aimed to compare the accuracy and performance of four genotyping methods for detecting single nucleotide polymorphisms (SNPs) in aldehyde dehydrogenase-2 (ALDH2), which is the principal enzyme involved in alcohol metabolism. Design and Methods We genotyped rs671 of ALDH2 in 96 coronary heart disease (CHD) patients with four methods including high resolution melting analysis (HRM), TaqMan allelic discrimination assay (TaqMan), allele-specific PCR (AS-PCR) and pyrosequencing. Meanwhile, we compared the accuracy and performance of these methods. Results All selected patients were successfully genotyped with referred methods. The results of these four assays showed 100% concordant results and had 100% accuracy as verified by Sanger sequencing. Conclusions All of the referred methods can be used for genotyping ALDH2 rs671 with the same accuracy compared to Sanger sequencing. In small size of clinical samples, HRM and AS-PCR outperform over others due to their lower cost and less hands-on operation, which are suitable for clinical application.
Collapse
Affiliation(s)
- Lina Zhang
- Departments of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People’s Rep. of China
| | - Jinzhao Zhao
- Departments of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People’s Rep. of China
| | - Guanglin Cui
- Departments of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People’s Rep. of China
| | - Hong Wang
- Departments of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People’s Rep. of China
- * E-mail:
| | - Dao Wen Wang
- Departments of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People’s Rep. of China
| |
Collapse
|
7
|
Comparison of different DNA binding fluorescent dyes for applications of high-resolution melting analysis. Clin Biochem 2015; 48:609-16. [PMID: 25641335 DOI: 10.1016/j.clinbiochem.2015.01.010] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Revised: 01/13/2015] [Accepted: 01/15/2015] [Indexed: 12/24/2022]
Abstract
OBJECTIVES Different applications of high-resolution melting (HRM) analysis have been adopted for a wide range of research and clinical applications. This study compares the performance of selected DNA binding fluorescent dyes for their possible application in HRM. DESIGN AND METHODS We compared twelve dyes with basic properties considered relevant for PCR amplification and melting curve analysis. These included PCR inhibition, fluorescence intensity, the ability to generate melting curves and their effect on melting temperature (Tm). Seven of these dyes with promising properties were then evaluated for possible use in basic HRM applications; such as small amplicon genotyping, genotyping of a 1 kb insertion/deletion polymorphism, probe-based genotyping and mutation screening. RESULTS Five dyes failed to exhibit promising properties during the first part of the study, and these were excluded from further testing. Of the remaining dyes, SYTO11, SYTO13 and SYTO16 showed better PCR inhibitory and Tm affecting properties compared to commercial HRM dyes LCGreen Plus, EvaGreen and ResoLight. Although the SYTO dyes generally exhibited good discrimination powers in HRM applications, SYTO11 and SYTO14 gave low signal intensity and lower quality results. CONCLUSIONS Our results suggest that the best performing dyes for HRM are those commercially offered for HRM analyses. However, the performance of SYTO16 and SYTO13 was comparable to the HRM dyes in the majority of our assays, thus demonstrating that they are also quite suitable for both real-time PCR and HRM applications.
Collapse
|
8
|
Zhao JJ, Wang XB, Luan Y, Liu JL, Liu L, Jia HY. Association of human leukocyte antigen gene polymorphism and mesangial proliferative glomerulonephritis in a large population-based study. Biomed Rep 2014; 1:751-756. [PMID: 24649023 DOI: 10.3892/br.2013.152] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Accepted: 07/16/2013] [Indexed: 01/25/2023] Open
Abstract
The aim of the present study was to investigate the association of human leukocyte antigen (HLA) gene polymorphism and clinical phenotypes of patients with mesangial proliferative glomerulonephritis (MsPGN). The genotyping of HLA-A, HLA-B and HLA-DRB1 alleles was detected in 1,536 consecutive MsPGN patients during the previous five years and 2,027 age- and gender-matched healthy individuals by using the polymerase chain reaction-sequence-specific primers method. The clinical and pathological data of the patients were collected and the genotype frequencies (GF) and odds ratio (OR) were analyzed. The allele frequencies of HLA-A*23, A*25, B*15, B*40, B*53 and DRB1*18 were significantly higher in MsPGN patients than in the controls (P<0.05). These alleles were considered as the suspected susceptibility genes (SSG) for MsPGN. Of note, results of the follow-up survey study demonstrated poorer prognosis of patients with SSG than those without SSG. On the other hand, the frequencies of A*32, A*33, B*50, B*58, B*60, B*71, DRB1*16 were lower in MsPGN patients than in the controls (P<0.05). However, the alleles A*20, A*22, A*35, A*36, A*38, B*21, B*73 and B*78 were not expressed in MsPGN patients. HLA gene polymorphism is associated with hereditary susceptibility to MsPGN. Therefore, there might be corresponding susceptibility and protective genes associated with MsPGN.
Collapse
Affiliation(s)
- Jing-Jie Zhao
- Clinical Molecular Biology Laboratory, The Second Hospital of Shandong University, Jinan, Shandong 250033, P.R. China
| | - Xi-Bing Wang
- Department of Gynaecology and Obstetrics, Maternal and Child Health Care Service Center of Zaozhuang, Shandong 277102, P.R. China
| | - Yun Luan
- Central Laboratory, The Second Hospital of Shandong University, Jinan, Shandong 250033, P.R. China
| | - Jun-Li Liu
- Clinical Molecular Biology Laboratory, The Second Hospital of Shandong University, Jinan, Shandong 250033, P.R. China
| | - Ling Liu
- Clinical Molecular Biology Laboratory, The Second Hospital of Shandong University, Jinan, Shandong 250033, P.R. China
| | - Hong-Ying Jia
- Department of Scientific Research, The Second Hospital of Shandong University, Jinan, Shandong 250033, P.R. China
| |
Collapse
|
9
|
Lin M, Jiao JW, Zhan XH, Zhan XF, Pan MC, Wang JL, Wang CF, Zhong TY, Zhang Q, Yu X, Wu JR, Yang HT, Lin F, Tong X, Yang H, Zha GC, Wang Q, Zheng L, Wen YF, Yang LY. High resolution melting analysis: a rapid screening and typing tool for common β-thalassemia mutation in Chinese population. PLoS One 2014; 9:e102243. [PMID: 25089872 PMCID: PMC4121066 DOI: 10.1371/journal.pone.0102243] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2013] [Accepted: 06/17/2014] [Indexed: 02/05/2023] Open
Abstract
β-thalassemia is a common inherited disorder worldwide including southern China, and at least 45 distinct β-thalassemia mutations have been identified in China. High-resolution melting (HRM) assay was recently introduced as a rapid, inexpensive and effective method for genotyping. However, there was no systemic study on the diagnostic capability of HRM to identify β-thalassemia. Here, we used an improved HRM method to screen and type 12 common β-thalassemia mutations in Chinese, and the rapidity and reliability of this method was investigated. The whole PCR and HRM procedure could be completed in 40 min. The heterozygous mutations and 4 kinds of homozygous mutations could be readily differentiated from the melting curve except c.-78A>G heterozygote and c.-79A>G heterozygote. The diagnostic reliability of this HRM assay was evaluated on 756 pre-typed genomic DNA samples and 50 cases of blood spots on filter paper, which were collected from seven high prevalent provinces in southern China. If c.-78A>G heterozygote and c.-79A>G heterozygote were classified into the same group (c.-78&79 A>G heterozygote), the HRM method was in complete concordance with the reference method (reverse dot blot/DNA-sequencing). In a conclusion, the HRM method appears to be an accurate and sensitive method for the rapid screening and identification of β-thalassemia mutations. In the future, we suggest this technology to be used in neonatal blood spot screening program. It could enlarge the coverage of β-thalassemia screening program in China. At the same time, its value should be confirmed in prospectively clinical and epidemiological studies.
Collapse
Affiliation(s)
- Min Lin
- Central Laboratory, Chaozhou Central Hospital Affiliated to Southern Medical University, Chaozhou, Guangdong Province, People's Republic of China
- Medical Laboratory, First Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong Province, People's Republic of China
| | - Ji-Wei Jiao
- Department of Biology, Hanshan Normal University, Chaozhou, Guangdong Province, People's Republic of China
| | - Xiu-Hui Zhan
- Department of Biology, Hanshan Normal University, Chaozhou, Guangdong Province, People's Republic of China
| | - Xiao-Fen Zhan
- Central Laboratory, Chaozhou Central Hospital Affiliated to Southern Medical University, Chaozhou, Guangdong Province, People's Republic of China
| | - Mei-Chen Pan
- Medical Laboratory, First Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong Province, People's Republic of China
| | - Jun-Li Wang
- Department of Medical Laboratory, Hospital of Youjiang Medical University for Nationalities, Baise, Guangxi Province, People's Republic of China
| | - Chun-Fang Wang
- Department of Medical Laboratory, Hospital of Youjiang Medical University for Nationalities, Baise, Guangxi Province, People's Republic of China
| | - Tian-Yu Zhong
- Medical Laboratory, First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi Province, People's Republic of China
| | - Qin Zhang
- Laboratory Medical Center, People's Hospital of Yunan Province, Kunming, Yunnan Province, People's Republic of China
| | - Xia Yu
- Department of Medical Laboratory, Chengdu Women's & Children's Central Hospital, Chengdu, Sichuan Province, People's Republic of China
| | - Jiao-Ren Wu
- Central Laboratory, Chaozhou Central Hospital Affiliated to Southern Medical University, Chaozhou, Guangdong Province, People's Republic of China
| | - Hui-Tian Yang
- Central Laboratory, Chaozhou Central Hospital Affiliated to Southern Medical University, Chaozhou, Guangdong Province, People's Republic of China
| | - Fen Lin
- Central Laboratory, Chaozhou Central Hospital Affiliated to Southern Medical University, Chaozhou, Guangdong Province, People's Republic of China
| | - Xin Tong
- Central Laboratory, Chaozhou Central Hospital Affiliated to Southern Medical University, Chaozhou, Guangdong Province, People's Republic of China
| | - Hui Yang
- Central Laboratory, Chaozhou Central Hospital Affiliated to Southern Medical University, Chaozhou, Guangdong Province, People's Republic of China
- Laboratory Medical Center, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, People's Republic of China
| | - Guang-Cai Zha
- Department of Biology, Hanshan Normal University, Chaozhou, Guangdong Province, People's Republic of China
| | - Qian Wang
- Laboratory Medical Center, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, People's Republic of China
| | - Lei Zheng
- Laboratory Medical Center, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong Province, People's Republic of China
| | - Ying-Fang Wen
- Medical Laboratory, Meixian People's Hospital, Meizhou, Guangdong Province, People's Republic of China
| | - Li-Ye Yang
- Central Laboratory, Chaozhou Central Hospital Affiliated to Southern Medical University, Chaozhou, Guangdong Province, People's Republic of China
- * E-mail:
| |
Collapse
|