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Ge YY, Lai YQ, Ju AP, Li LJ, Lu M, Xie LX, Huang M, Yang LY. Genotype and phenotype analysis of α-thalassemia fusion gene in southern China. Hematology 2024; 29:2399361. [PMID: 39263910 DOI: 10.1080/16078454.2024.2399361] [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: 05/27/2024] [Accepted: 08/26/2024] [Indexed: 09/13/2024] Open
Abstract
OBJECTIVE The α-globin fusion gene between the HBA2 and HBAP1 genes, is clinically important in thalassemia screening because this fusion gene can cause severe hemoglobin (Hb) H disease when combined with α0 -thalassemia (α0 -thal). In this study, we evaluate the red blood cell parameters of α-thalassemia fusion gene in southern China. METHOD Study samples suspected of α-thalassemia fusion gene were collected and confirmed by PCR-sequencing from one medical lab center in southern China. Their genotypes and phenotypes were analyzed. RESULTS A total of 266 cases of α-thalassemia fusion gene were confirmed in our lab from 2017 to 2023, most of them were from Hainan province (169 cases) and Huadu district of Guangzhou (21 cases), the nationality of 143 cases from Hainan was identified, with 71.3% (102/143) being from the Li minority. The Hb, MCV, MCH for αα/(αα)fusion in adult males were 143.5±11.83g/L, 81.51±4.39 fl, and 26.26±1.29 pg, respectively; and in females, they were 126.69±12.89 g/L, 80.10±4.05 fl, 25.8±2.04 pg, respectively. All 12 cases (αα) Fusion/ --SEA showed anemia with decreased Hb, MCV and MCH. CONCLUSION The carriers of α-globin fusion gene heterozygotes are clinically silent and exhibit an α+ phenotype. Individuals with (αα)Fusion/--SEA show apparent anemia. This α-globin fusion gene is relatively common in southern China, specifically among the Li minority of Hainan province. Therefore, it should be taken into account for genetic counseling purposes.
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Affiliation(s)
- Yi-Yuan Ge
- Guangdong Hybribio Limited Corporation, Guangzhou, People's Republic of China
| | - Yan-Quan Lai
- Department of Eugenics, Hainan Provincial Public Service Center of Prenatal and Postnatal Care, Haikou, People's Republic of China
| | - Ai-Ping Ju
- Department of Laboratory Medicine, Maternal and Child Health Hospital of Huadu District, Guangzhou, People's Republic of China
| | - Lie-Jun Li
- Guangdong Hybribio Limited Corporation, Guangzhou, People's Republic of China
| | - Min Lu
- Guangdong Hybribio Limited Corporation, Guangzhou, People's Republic of China
| | - Long-Xu Xie
- Guangdong Hybribio Limited Corporation, Guangzhou, People's Republic of China
| | - Min Huang
- Department of Clinical Laboratory, Hainan Provincial Public Service Center of Prenatal and Postnatal Care, Haikou, People's Republic of China
| | - Li-Ye Yang
- Precision Medical Lab Center, People's Hospital of Yangjiang, Yangjiang, People's Republic of China
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Ge YY, Xie J, Liao YW, Xie LX, Yang LY. Development and clinical validation of a novel detection kit for α-thalassemia in southern Chinese. Front Genet 2024; 15:1457248. [PMID: 39301525 PMCID: PMC11410688 DOI: 10.3389/fgene.2024.1457248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2024] [Accepted: 08/22/2024] [Indexed: 09/22/2024] Open
Abstract
Objective This study aimed to develop and assess a novel reverse dot blot assay for the simultaneous detection of 10 types of α-thalassemia alleles in the Chinese population, including six common variants of-SEA, -α3.7, -α4.2, αCS, αQS, and αWS, and four rare variants of αααanti-4.2, αααanti-3.7, --FIL deletion and--THAI deletion. Methods The novel thalassemia gene assay utilized a two-tier multiplex polymerase chain reaction amplification system and one round of hybridization. Genomic DNA samples were sourced from three hospitals in southern China. Each clinically validated DNA sample was re-evaluated using the new multiplex polymerase chain reaction/reverse dot blot assay Ⅲ (M-PCR/RDB Ⅲ). Results The study analyzed a total of 1,148 unrelated participants, consisting of 810 thalassemia patients and 338 healthy control subjects. Valid hybridization results were obtained for 1,147 samples, with one case (thalassemia carrier) being excluded from the study due to the poor quality of DNA. All 1,147 samples, including those with α heterozygous thalassemia, α homozygous thalassemia, α compound heterozygous thalassemia, and control subjects were accurately genotyped, showing 100% concordance with the reference assays. Conclusion The novel M-PCR/RDB Ⅲ assay proved to be simple, rapid, and precise, indicating its potential for genetic screening and clinical diagnosis of both common and rare α-thalassemia variants in Chinese populations.
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Affiliation(s)
- Yi-Yuan Ge
- Guangzhou Hybribio Medicine Science and Technology Corporation, Guangzhou, Guangdong Province, China
| | - Jun Xie
- Guangzhou Hybribio Medicine Science and Technology Corporation, Guangzhou, Guangdong Province, China
| | - Yu-Wei Liao
- Precision Medical Lab Center, People's Hospital of Yangjiang, Yangjiang, Guangdong Province, China
| | - Long-Xu Xie
- Guangzhou Hybribio Medicine Science and Technology Corporation, Guangzhou, Guangdong Province, China
| | - Li-Ye Yang
- Precision Medical Lab Center, People's Hospital of Yangjiang, Yangjiang, Guangdong Province, China
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Liang HF, Liang WM, Xie WG, Lin F, Liu LL, Li LJ, Ge YY, Lu M, Liao YW, Zeng GK, Yao JX, Situ JW, Yang LY. The gene spectrum of thalassemia in Yangjiang of western Guangdong Province. Front Genet 2023; 14:1126099. [PMID: 36861132 PMCID: PMC9968962 DOI: 10.3389/fgene.2023.1126099] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Accepted: 01/18/2023] [Indexed: 02/15/2023] Open
Abstract
Background: Thalassemia presents a higher incidence in southern China. The objective of this study is to analyze the genotype distribution of thalassemia in Yangjiang, a western city of Guangdong Province in China. Methods: The genotypes of suspected cases with thalassemia were tested by PCR and reverse dot blot (RDB). Unidentified rare thalassemia genotypes of the samples were further ascertained by PCR and direct DNA sequencing. Results: Among 22467 suspected cases with thalassemia, 7658 cases were found with thalassemia genotypes using our PCR-RDB kit. Among these 7658 cases, 5313 cases were found with α-thalassemia (α-thal) alone, --SEA/αα was the most common genotype, accounting for 61.75% of α-thal genotypes, and the following mutations were found: α3.7/αα, -α4.2/αα, αCSα/αα, αWSα/αα, and αQSα/αα. A total of 2032 cases were found with β-thalassemia (β-thal) alone. βCD41-42/βN, βIVS-II-654/βN, and β-28/βN accounted for 80.9% of all β-thal genotypes, and the following genotypes were found: βCD17/βN, βCD71-72/βN, and βE/βN. Compound heterozygotes of β-thal and β-thalassemia homozygotes were identified in 11 and five cases, respectively, in this study. α-thal combined with β-thal was identified in 313 cases, showing 57 genotype combinations of the coincidence of both Hb disorders; one extreme patient had a genotype of --SEA/αWSα and βCD41-42/β-28. In addition, four rare α-mutations (--THAI, HKαα, Hb Q-Thailand, and CD31 AGG>AAG) and six rare β-mutations (CD39 CAG>TAG, IVS-Ⅱ-2 (-T), -90(C>T), Chinese Gγ+(Aγδβ)0, CD104 (-G), and CD19 A>G) were also found in this study population. Conclusion: This study provided detailed genotypes of thalassemia in Yangjiang of western Guangdong Province in China and reflected the complexity of genotypes in this high-prevalence region, and this would be valuable for diagnosis and counseling for thalassemia in this area.
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Affiliation(s)
- Hong-Feng Liang
- Precision Medical Lab Center, People’s Hospital of Yangjiang, Yangjiang, Guangdong, China
| | - Wei-Min Liang
- Medical Laboratory, Women and Children Hospital of Yangjiang, Yangjiang, Guangdong, China
| | - Wen-Guang Xie
- Medical Laboratory, Women and Children Hospital of Yangjiang, Yangjiang, Guangdong, China
| | - Fen Lin
- Precision Medical Lab Center, Chaozhou Central Hospital Affiliated to Southern Medical University, Chaozhou, Guangdong, China
| | - Li-Li Liu
- Precision Medical Lab Center, People’s Hospital of Yangjiang, Yangjiang, Guangdong, China
| | - Lie-Jun Li
- Guangdong Hybribio Limited Corporation, Chaozhou, Guangdong, China
| | - Yi-Yuan Ge
- Guangdong Hybribio Limited Corporation, Chaozhou, Guangdong, China
| | - Min Lu
- Guangdong Hybribio Limited Corporation, Chaozhou, Guangdong, China
| | - Yu-Wei Liao
- Precision Medical Lab Center, People’s Hospital of Yangjiang, Yangjiang, Guangdong, China
| | - Guang-Kuan Zeng
- Precision Medical Lab Center, People’s Hospital of Yangjiang, Yangjiang, Guangdong, China
| | - Jin-Xiu Yao
- Laboratory Medical Center, People’s Hospital of Yangjiang, Yangjiang, Guangdong, China
| | - Jing-Wei Situ
- Laboratory Medical Center, People’s Hospital of Yangjiang, Yangjiang, Guangdong, China
| | - Li-Ye Yang
- Precision Medical Lab Center, People’s Hospital of Yangjiang, Yangjiang, Guangdong, China,*Correspondence: Li-Ye Yang,
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Wu J, Xie D, Wang L, Kuang Y, Luo S, Ren L, Li D, Mao A, Li J, Chen L, An B, Huang S. Application of third-generation sequencing for genetic testing of thalassemia in Guizhou Province, Southwest China. Hematology 2022; 27:1305-1311. [DOI: 10.1080/16078454.2022.2156720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Affiliation(s)
- Jiangfen Wu
- School of Medicine, Guizhou University, Guiyang, People’s Republic of China
| | - Dan Xie
- School of Medicine, Guizhou University, Guiyang, People’s Republic of China
| | - Lei Wang
- School of Medicine, Guizhou University, Guiyang, People’s Republic of China
| | - Ying Kuang
- Prenatal Diagnosis Center, Guizhou Provincial People’s Hospital, Guiyang, People’s Republic of China
| | - Shulin Luo
- Prenatal Diagnosis Center, Guizhou Provincial People’s Hospital, Guiyang, People’s Republic of China
| | - Lingyan Ren
- Prenatal Diagnosis Center, Guizhou Provincial People’s Hospital, Guiyang, People’s Republic of China
| | - Di Li
- Prenatal Diagnosis Center, Guizhou Provincial People’s Hospital, Guiyang, People’s Republic of China
| | - Aiping Mao
- Berry Genomics Corporation, Beijing, People’s Republic of China
| | - Jiaqi Li
- Berry Genomics Corporation, Beijing, People’s Republic of China
| | - Libao Chen
- Berry Genomics Corporation, Beijing, People’s Republic of China
| | - Bangquan An
- Discipline Inspection and Supervision Office, Guizhou provincial people’s hospital, Guiyang, People’s Republic of China
| | - Shengwen Huang
- School of Medicine, Guizhou University, Guiyang, People’s Republic of China
- Prenatal Diagnosis Center, Guizhou Provincial People’s Hospital, Guiyang, People’s Republic of China
- NHC Key Laboratory of Pulmonary Immunological Diseases, Guizhou Provincial People’s Hospital, Guiyang, People’s Republic of China
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Clinical Performance Study of a New Fully Automated Red Blood Cell Permeability Fragility Analyzer. JOURNAL OF HEALTHCARE ENGINEERING 2022; 2022:5642907. [PMID: 35392140 PMCID: PMC8983219 DOI: 10.1155/2022/5642907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 03/11/2022] [Accepted: 03/12/2022] [Indexed: 11/21/2022]
Abstract
In order to verify the applicability of the erythrocyte fragility test (EFT) carried out by the new fully automatic erythrocyte permeability fragility analyzer RA-800 for thalassemia screening, a total of 100 cases of suspected thalassemia patients who underwent pregnancy examinations at Luohu District People's Hospital are included. The results of a new automatic erythrocyte permeability fragility analyzer RA-800 are compared with the results of the detection system composing of the KOFA erythrocyte fragility test kit currently used in clinical laboratories. The diagnosis confirmed by genetic testing is used as the gold standard to evaluate the applicability of RA-800. The sensitivity, specificity, and accuracy of the new automatic erythrocyte permeability fragility analyzer RA-800 screening for thalassemia were 66.67%, 92.86%, and 85.00%. The KOFA direct colorimetries are 76.67%, 81.43%, and 80.00%. The kappa value for the screening of thalassemia was 0.558, which concludes that the consistency was moderate. The ROC curve indicates that both two methods had diagnostic significance for the diagnostic value of thalassemia. The new automatic erythrocyte permeability fragility analyzer RA-800 is suitable for thalassemia screening, and the performance indexes meet the clinical requirements.
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