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Li Y, Ye J, Liang L, Tan X, Zheng L, Qin T, Yu L. Detection of α-thalassemia South-East Asian deletion based on a fully integrated digital polymerase chain reaction system DropXpert S6. Hematology 2024; 29:2365596. [PMID: 38864494 DOI: 10.1080/16078454.2024.2365596] [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: 01/10/2024] [Accepted: 06/04/2024] [Indexed: 06/13/2024] Open
Abstract
OBJECTIVES This study aimed to establish a droplet digital polymerase chain reaction (ddPCR) assay for South-East Asian (SEA) deletion based on a fully integrated digital PCR system DropXpert S6. METHODS A total of 151 whole blood samples, 10 chorionic villus samples, and 17 amniotic fluid samples were collected, including 106 SEA heterozygotes, 43 normal individuals, 10 Hb Bart's hydrops details, and 19 SEA deletions combined with other genotypes.Genotypes of these samples were determined by the Gap-PCR method. We perform a series of optimizations of the ddPCR system to ensure the performance of the entire ddPCR reaction, such as droplet stability, fluorescence clustering, sensitivity, and accuracy. RESULTS Our assay exhibited 99.4% (177/178) accuracy compared with the Gap-PCR method, and the minimum detection limit of DNA was 0.1 ng/μL.Both targets have reliable linearity, R2 = 0.9999 for the α-thalassemia SEA deletion allele and R2 = 1 for the wild-type allele. The coefficient of variation for α-thalassemia SEA deletion allele detection at 2 and 10 ng/μL concentrations was 5.42% and 1.91%, respectively. In contrast, the coefficient of variation for wild-type allele detection was 4.06% and 1.83%, demonstrating its high quantitative accuracy. In addition, the DropXpert S6 PCR system showed some advantages over other ddPCR instruments, such as reducing testing costs, simplifying and automating the workflow. CONCLUSIONS The DropXpert S6 PCR system provided a highly accurate diagnosis for α-thalassemia SEA deletion and can be used to detect α-thalassemia as an alternative method.
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Affiliation(s)
- Youqiong Li
- Center for Medical Genetics and Prenatal Diagnosis, People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, People's Republic of China
| | - Junwei Ye
- Research and Development Department, Shenzhen Biorain Technology Co., Ltd, Shenzhen, People's Republic of China
| | - Liang Liang
- Center for Medical Genetics and Prenatal Diagnosis, People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, People's Republic of China
| | - Xiao Tan
- Research and Development Department, Shenzhen Biorain Technology Co., Ltd, Shenzhen, People's Republic of China
| | - Lihong Zheng
- Center for Medical Genetics and Prenatal Diagnosis, People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, People's Republic of China
| | - Ting Qin
- Center for Medical Genetics and Prenatal Diagnosis, People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, People's Republic of China
| | - Linfen Yu
- Research and Development Department, Shenzhen Biorain Technology Co., Ltd, Shenzhen, People's Republic of China
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Della Starza I, De Novi LA, Elia L, Bellomarino V, Beldinanzi M, Soscia R, Cardinali D, Chiaretti S, Guarini A, Foà R. Optimizing Molecular Minimal Residual Disease Analysis in Adult Acute Lymphoblastic Leukemia. Cancers (Basel) 2023; 15:374. [PMID: 36672325 PMCID: PMC9856386 DOI: 10.3390/cancers15020374] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 01/02/2023] [Accepted: 01/03/2023] [Indexed: 01/09/2023] Open
Abstract
Minimal/measurable residual disease (MRD) evaluation has resulted in a fundamental instrument to guide patient management in acute lymphoblastic leukemia (ALL). From a methodological standpoint, MRD is defined as any approach aimed at detecting and possibly quantifying residual neoplastic cells beyond the sensitivity level of cytomorphology. The molecular methods to study MRD in ALL are polymerase chain reaction (PCR) amplification-based approaches and are the most standardized techniques. However, there are some limitations, and emerging technologies, such as digital droplet PCR (ddPCR) and next-generation sequencing (NGS), seem to have advantages that could improve MRD analysis in ALL patients. Furthermore, other blood components, namely cell-free DNA (cfDNA), appear promising and are also being investigated for their potential role in monitoring tumor burden and response to treatment in hematologic malignancies. Based on the review of the literature and on our own data, we hereby discuss how emerging molecular technologies are helping to refine the molecular monitoring of MRD in ALL and may help to overcome some of the limitations of standard approaches, providing a benefit for the care of patients.
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Affiliation(s)
- Irene Della Starza
- Hematology, Department of Translational and Precision Medicine, “Sapienza” University, Via Benevento 6, 00161 Rome, Italy
- GIMEMA Foundation, 00182 Rome, Italy
| | - Lucia Anna De Novi
- Hematology, Department of Translational and Precision Medicine, “Sapienza” University, Via Benevento 6, 00161 Rome, Italy
| | - Loredana Elia
- Hematology, Department of Translational and Precision Medicine, “Sapienza” University, Via Benevento 6, 00161 Rome, Italy
| | - Vittorio Bellomarino
- Hematology, Department of Translational and Precision Medicine, “Sapienza” University, Via Benevento 6, 00161 Rome, Italy
| | - Marco Beldinanzi
- Hematology, Department of Translational and Precision Medicine, “Sapienza” University, Via Benevento 6, 00161 Rome, Italy
| | - Roberta Soscia
- Hematology, Department of Translational and Precision Medicine, “Sapienza” University, Via Benevento 6, 00161 Rome, Italy
| | - Deborah Cardinali
- Hematology, Department of Translational and Precision Medicine, “Sapienza” University, Via Benevento 6, 00161 Rome, Italy
| | - Sabina Chiaretti
- Hematology, Department of Translational and Precision Medicine, “Sapienza” University, Via Benevento 6, 00161 Rome, Italy
| | - Anna Guarini
- Hematology, Department of Translational and Precision Medicine, “Sapienza” University, Via Benevento 6, 00161 Rome, Italy
| | - Robin Foà
- Hematology, Department of Translational and Precision Medicine, “Sapienza” University, Via Benevento 6, 00161 Rome, Italy
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Bao X, Qin D, Ma J, Zhou X, Wang J, Yao C, Zhang L, Du L. Accurate detection of α-globin gene copy number variants with two reactions using droplet digital PCR. Hematology 2022; 27:198-203. [PMID: 35100090 DOI: 10.1080/16078454.2022.2030885] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND The α-thalassemia is a highly prevalent disease in tropical and subtropical regions, including southern China, and is mainly caused by deletion in α-globin genes (HBA1 and HBA2). The clinical manifestation of α-thalassemia is highly correlated with the copy number of α-globin genes. The decrease in copy number results in α-thalassemia, while duplication or triplication compounded with β-thalassemia may aggravate the clinical manifestation. However, the common methods used to measure the copy number variants can only detect the three common types: -SEA, -α3.7, and -α4.2, and may easily miss the rare deletional type and duplication or triplication cases. Therefore, a new method that allows the detection of different copy number variants in α-globin genes simultaneously and accurately needs to be established. METHODS A total of 428 peripheral-blood and fetal chorionic villus or amniotic fluid samples were used in this study. We employed a pair of primers and two probes, one for HBA1 and another for HBA2, to perform droplet digital polymerase chain reaction (ddPCR). Each reaction needed the ddPCR of RPP30 as a reference gene to calculate the copy number. RESULTS We accurately detected the copy number variants in α-globin genes, including the common form α-thalassemia, triplications such as αααanti4.2, and trisomy 16, by performing only two reactions. The accuracy rate for detecting the copy number of α-globin genes was up to 100%. CONCLUSION In conclusion, ddPCR served as an accurate and rapid method for detecting copy number variations in the clinical screening for α-thalassemia.
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Affiliation(s)
- Xiuqin Bao
- Medical Genetic Center, Guangdong Women and Children Hospital, Guangzhou, People's Republic of China.,Maternal and Children Metabolic-Genetic Key Laboratory, Guangdong Women and Children Hospital, Guangzhou, People's Republic of China.,Thalassemia Diagnosis Center, Guangdong Women and Children Hospital, Guangzhou, People's Republic of China
| | - Danqing Qin
- Medical Genetic Center, Guangdong Women and Children Hospital, Guangzhou, People's Republic of China.,Maternal and Children Metabolic-Genetic Key Laboratory, Guangdong Women and Children Hospital, Guangzhou, People's Republic of China.,Thalassemia Diagnosis Center, Guangdong Women and Children Hospital, Guangzhou, People's Republic of China
| | - Jian Ma
- Translational Medicine Center, Guangdong Women and Children Hospital, Guangzhou, People's Republic of China
| | - Xiangcheng Zhou
- Translational Medicine Center, Guangdong Women and Children Hospital, Guangzhou, People's Republic of China
| | - Jicheng Wang
- Medical Genetic Center, Guangdong Women and Children Hospital, Guangzhou, People's Republic of China.,Maternal and Children Metabolic-Genetic Key Laboratory, Guangdong Women and Children Hospital, Guangzhou, People's Republic of China.,Thalassemia Diagnosis Center, Guangdong Women and Children Hospital, Guangzhou, People's Republic of China
| | - Cuize Yao
- Medical Genetic Center, Guangdong Women and Children Hospital, Guangzhou, People's Republic of China.,Maternal and Children Metabolic-Genetic Key Laboratory, Guangdong Women and Children Hospital, Guangzhou, People's Republic of China.,Thalassemia Diagnosis Center, Guangdong Women and Children Hospital, Guangzhou, People's Republic of China
| | - Liang Zhang
- Translational Medicine Center, Guangdong Women and Children Hospital, Guangzhou, People's Republic of China
| | - Li Du
- Medical Genetic Center, Guangdong Women and Children Hospital, Guangzhou, People's Republic of China.,Maternal and Children Metabolic-Genetic Key Laboratory, Guangdong Women and Children Hospital, Guangzhou, People's Republic of China.,Thalassemia Diagnosis Center, Guangdong Women and Children Hospital, Guangzhou, People's Republic of China
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4
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Sawakwongpra K, Tangmansakulchai K, Ngonsawan W, Promwan S, Chanchamroen S, Quangkananurug W, Sriswasdi S, Jantarasaengaram S, Ponnikorn S. Droplet-based digital PCR for non-invasive prenatal genetic diagnosis of α and β-thalassemia. Biomed Rep 2021; 15:82. [PMID: 34512970 PMCID: PMC8411484 DOI: 10.3892/br.2021.1458] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 07/15/2021] [Indexed: 12/16/2022] Open
Abstract
Non-invasive prenatal diagnosis (NIPD) of isolated cell-free DNA from maternal plasma has been applied to detect monogenic diseases in the fetus. Droplet digital PCR (ddPCR) is a sensitive and quantitative technique for NIPD. In the present study, the development and evaluation of ddPCR-based assays for common α and β-thalassemia variants amongst the Asian population was described; specifically, Southeast Asian (SEA) deletion, HbE, and 41/42 (-CTTT). SEA is caused by deletion of a 20 kb region surrounding the α-globin gene, whilst HbE and 41/42 (-CTTT) are caused by point mutations on the β-globin gene. Cell-free DNA samples from 46 singleton pregnant women who were carriers of these mutations were isolated and quantified using ddPCR with specially designed probes for each target allele. Allelic copy number calculation and likelihood ratio tests were used to classify fetal genotypes. Classification performances were evaluated against ground truth fetal genotypes obtained from conventional amniocentesis. Copy number variation analysis of SEA deletion accurately classified fetal genotypes in 20 out of 22 cases with an area under the receiver operating characteristic curve of 0.98 for detecting Hb Bart's hydrops fetalis. For HbE cases, 10 out of 16 samples were correctly classified, and three were inconclusive. For 41/42 (-CTTT) cases, 2 out of 8 were correctly classified, and four were inconclusive. The correct genotype was not rejected in any inconclusive case and may be resolved with additional ddPCR experiments. These results indicate that ddPCR-based analysis of maternal plasma can become an accurate and effective NIPD for SEA deletion α-(0) thalassemia. Although the performance of ddPCR on HbE and 41/42 (-CTTT) mutations were not sufficient for clinical application, these results may serve as a foundation for future works in this field.
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Affiliation(s)
- Kritchakorn Sawakwongpra
- Chulabhorn International College of Medicine, Thammasat University, Khlong Luang, Pathum Thani 12120, Thailand
| | | | | | | | - Sujin Chanchamroen
- Next Generation Genomic, Pathum Wan, Bangkok 10330, Thailand.,SAFE Fertility Center, Pathum Wan, Bangkok 10330, Thailand
| | - Wiwat Quangkananurug
- Next Generation Genomic, Pathum Wan, Bangkok 10330, Thailand.,SAFE Fertility Center, Pathum Wan, Bangkok 10330, Thailand
| | - Sira Sriswasdi
- Research Affairs, Faculty of Medicine, Chulalongkorn University, Pathum Wan, Bangkok 10330, Thailand.,Computational Molecular Biology Group, Faculty of Medicine, Chulalongkorn University, Pathum Wan, Bangkok 10330, Thailand
| | - Surasak Jantarasaengaram
- Department of Obstetrics and Gynecology, Rajavithi Hospital, Ratchathewi, Bangkok 10400, Thailand
| | - Saranyoo Ponnikorn
- Chulabhorn International College of Medicine, Thammasat University, Khlong Luang, Pathum Thani 12120, Thailand
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5
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Gao X, Li J, Li C, Zhang Z, Zhang W, Yao J, Guan M, Guo Z, Li C, Zhou L. High filling rate digital PCR through-hole array chip with double independent S-shaped flow channels. BIOMICROFLUIDICS 2020; 14:034109. [PMID: 32509051 PMCID: PMC7266645 DOI: 10.1063/5.0006374] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 05/16/2020] [Indexed: 05/13/2023]
Abstract
Sample digital technology is a powerful method for absolute quantification of target molecules such as nucleic acids and proteins. The excellent sample stability and mass production capability has enabled the development of microwell array-based sample digitizing methods. However, in current microwell array chips, samples are loaded by the liquid scraping method, which requires complex manual operation and results in a low filling rate and limited hole filling uniformity. Here, we perform sample loading of a through-hole array chip by a microfluidics-driven method and design a double independent S-shaped flow channels sandwiched through-hole array chip. Because of the capillary force and capillary burst pressure, the sample flowing in the channel can be trapped into through-holes, but cannot flow through the other side. Via air flow and displacement of the remaining sample in the channel, the sample can be partitioned consistently, with zero surplus sample residue in the channel. We evaluated the actual performance of the sample-loading process: the chip enables 99.10% filling rate of 18 500 through-holes, with a grayscale coefficient of variation value of 6.03% determined from fluorescence images. In performing digital polymerase chain reaction on chip, the chip demonstrates good performance for the absolute quantification of target DNA. The simple and robust design of our chip, with excellent filling rate and microsample uniformity, indicates potential for use in a variety of sample digitization applications.
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Affiliation(s)
| | - Jinze Li
- CAS Key Laboratory of Bio-medical Diagnostics,
Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of
Sciences, Suzhou, Jiangsu 215163, People's Republic of
China
| | | | | | | | | | - Ming Guan
- Huashan Hospital, Fudan University,
Shanghai 200040, People's Republic of China
| | | | - Chao Li
- CAS Key Laboratory of Bio-medical Diagnostics,
Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of
Sciences, Suzhou, Jiangsu 215163, People's Republic of
China
| | - Lianqun Zhou
- Author to whom correspondence should be addressed:
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6
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Pantiya P, Chairatanapiwong S, Dankai D, Nualkeaw S, Jaiping K, Singboottra P, Pornprasert S. False-positive result of immunochromatographic (IC) strip test for the diagnosis of α-thalassemia in samples with autoantibodies. ACTA ACUST UNITED AC 2019; 58:e44-e46. [DOI: 10.1515/cclm-2019-0827] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Indexed: 11/15/2022]
Affiliation(s)
- Patcharapong Pantiya
- Department of Medical Technology, Faculty of Associated Medical Sciences , Chiang Mai University , Chiang Mai , Thailand
| | - Saowanit Chairatanapiwong
- Department of Medical Technology, Faculty of Associated Medical Sciences , Chiang Mai University , Chiang Mai , Thailand
| | - Dararat Dankai
- Immunology Laboratory, Diagnostic Laboratory, Maharajnokorn Chiang Mai Hospital, Faculty of Medicine , Chiang Mai University , Chiang Mai , Thailand
| | - Sarayut Nualkeaw
- Medical Technology Department , Lamphun Hospital , Lamphun , Thailand
| | - Kanokwan Jaiping
- Medical Technology Department , Lamphun Hospital , Lamphun , Thailand
| | - Panthong Singboottra
- Department of Medical Technology, Faculty of Associated Medical Sciences , Chiang Mai University , Chiang Mai , Thailand
| | - Sakorn Pornprasert
- Department of Medical Technology, Faculty of Associated Medical Sciences , Chiang Mai University , Chiang Mai , Thailand
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7
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Della Starza I, Chiaretti S, De Propris MS, Elia L, Cavalli M, De Novi LA, Soscia R, Messina M, Vitale A, Guarini A, Foà R. Minimal Residual Disease in Acute Lymphoblastic Leukemia: Technical and Clinical Advances. Front Oncol 2019; 9:726. [PMID: 31448230 PMCID: PMC6692455 DOI: 10.3389/fonc.2019.00726] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Accepted: 07/22/2019] [Indexed: 12/28/2022] Open
Abstract
Introduction: Acute lymphoblastic leukemia (ALL) is the first neoplasm where the assessment of early response to therapy by minimal residual disease (MRD) monitoring has proven to be a fundamental tool to guide therapeutic choices. The most standardized methods to study MRD in ALL are multi-parametric flow cytometry (MFC) and polymerase chain reaction (PCR) amplification-based methods. Emerging technologies hold the promise to improve MRD detection in ALL patients. Moreover, novel therapies, such as monoclonal antibodies, bispecific T-cell engagers, and chimeric antigen receptor T cells (CART) represent exciting advancements in the management of B-cell precursor (BCP)-ALL. Aims: Through a review of the literature and in house data, we analyze the current status of MRD assessment in ALL to better understand how some of its limitations could be overcome by emerging molecular technologies. Furthermore, we highlight the future role of MRD monitoring in the context of personalized protocols, taking into account the genetic complexity in ALL. Results and Conclusions: Molecular rearrangements (gene fusions and immunoglobulin and T-cell receptor-IG/TR gene rearrangements) are widely used as targets to detect residual leukemic cells in ALL patients. The advent of novel techniques, namely next generation flow cytometry (NGF), digital-droplet-PCR (ddPCR), and next generation sequencing (NGS) appear important tools to evaluate MRD in ALL, since they have the potential to overcome the limitations of standard approaches. It is likely that in the forthcoming future these techniques will be incorporated in clinical trials, at least at decisional time points. Finally, the advent of new powerful compounds is further increasing MRD negativity rates, with benefits in long-term survival and a potential reduction of therapy-related toxicities. However, the prognostic relevance in the setting of novel immunotherapies still needs to be evaluated.
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Affiliation(s)
- Irene Della Starza
- Hematology, Department of Translational and Precision Medicine, Sapienza University of Rome, Rome, Italy.,GIMEMA Foundation, Rome, Italy
| | - Sabina Chiaretti
- Hematology, Department of Translational and Precision Medicine, Sapienza University of Rome, Rome, Italy
| | - Maria S De Propris
- Hematology, Department of Translational and Precision Medicine, Sapienza University of Rome, Rome, Italy
| | - Loredana Elia
- Hematology, Department of Translational and Precision Medicine, Sapienza University of Rome, Rome, Italy
| | - Marzia Cavalli
- Hematology, Department of Translational and Precision Medicine, Sapienza University of Rome, Rome, Italy
| | - Lucia A De Novi
- Hematology, Department of Translational and Precision Medicine, Sapienza University of Rome, Rome, Italy
| | - Roberta Soscia
- Hematology, Department of Translational and Precision Medicine, Sapienza University of Rome, Rome, Italy
| | - Monica Messina
- Hematology, Department of Translational and Precision Medicine, Sapienza University of Rome, Rome, Italy
| | - Antonella Vitale
- Hematology, Department of Translational and Precision Medicine, Sapienza University of Rome, Rome, Italy
| | - Anna Guarini
- Hematology, Department of Translational and Precision Medicine, Sapienza University of Rome, Rome, Italy.,Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy
| | - Robin Foà
- Hematology, Department of Translational and Precision Medicine, Sapienza University of Rome, Rome, Italy
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8
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Wang WJ, Zheng CF, Liu Z, Tan YH, Chen XH, Zhao BL, Li GX, Xu ZF, Ren FG, Zhang YF, Chang JM, Wang HW. Droplet digital PCR for BCR/ABL(P210) detection of chronic myeloid leukemia: A high sensitive method of the minimal residual disease and disease progression. Eur J Haematol 2018; 101:291-296. [PMID: 29691899 DOI: 10.1111/ejh.13084] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/13/2018] [Indexed: 12/11/2022]
Abstract
OBJECTIVE This study intended to establish a droplet digital PCR (dd-PCR) for monitoring minimal residual disease (MRD) in patients with BCR/ABL (P210)-positive chronic myeloid leukemia (CML), thereby achieving deep-level monitoring of tumor load and determining the efficacy for guided clinically individualized treatment. METHODS Using dd-PCR and RT-qPCR, two cell suspensions were obtained from K562 cells and normal peripheral blood mononuclear cells by gradient dilution and were measured at the cellular level. At peripheral blood (PB) level, 61 cases with CML-chronic phase (CML-CP) were obtained after tyrosine kinase inhibitor (TKI) treatment and regular follow-ups. By RT-qPCR, BCR/ABL (P210) fusion gene was undetectable in PB after three successive analyses, which were performed once every 3 months. At the same time, dd-PCR was performed simultaneously with the last equal amount of cDNA. Ten CML patients with MR4.5 were followed up by the two methods. RESULTS At the cellular level, consistency of results of dd-PCR and RT-qPCR reached R2 ≥ 0.99, with conversion equation of Y = 33.148X1.222 (Y: dd-PCR results; X: RT-qPCR results). In the dd-PCR test, 11 of the 61 patients with CML (18.03%) tested positive and showed statistically significant difference (P < .01). In the follow-up of 10 CML patients who were in MR4.5. All patients were loss of MR4.0, and 4 were tested positive by dd-PCR 3 months earlier than by RT-qPCR. CONCLUSION In contrast with RT-qPCR, dd-PCR is more sensitive, thus enabling accurate conversion of dd-PCR results into internationally standard RT-qPCR results by conversion equation, to achieve a deeper molecular biology-based stratification of BCR/ABL(P210) MRD. It has some reference value to monitor disease progression in clinic.
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Affiliation(s)
- Wen-Jun Wang
- Department of Hematology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Chao-Feng Zheng
- Department of Hematology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Zhuang Liu
- Department of Hematology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Yan-Hong Tan
- Department of Hematology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Xiu-Hua Chen
- Department of Hematology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Bin-Liang Zhao
- School of Public Health, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Guo-Xia Li
- Department of Hematology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Zhi-Fang Xu
- Department of Hematology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Fang-Gang Ren
- Department of Hematology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Yao-Fang Zhang
- Department of Hematology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Jian-Mei Chang
- Department of Hematology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Hong-Wei Wang
- Department of Hematology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
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9
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Aiempanakit K, Apinantriyo B. Peripheral Blood Smear of Bart’s Hydrops Fetalis. Indian J Hematol Blood Transfus 2018; 34:560-561. [DOI: 10.1007/s12288-017-0908-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Accepted: 12/04/2017] [Indexed: 11/29/2022] Open
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10
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Suwannakhon N, Pongsawatkul K, Seeratanachot T, Rasri W, Mahingsa K, Pingyod A, Bumrungpakdee W, Sanguansermsri T. Fast-Track Strategy for the Prevention of Hb Bart’s Hydrops Fetalis Syndrome. THALASSEMIA REPORTS 2017. [DOI: 10.4081/thal.2017.6620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We propose a fast-track strategy [direct blood DNA analysis using a quantitative real-time polymerase chain reaction (PCR) technique] for the early risk detection and prenatal diagnosis of α(0)-thalassemia (SEA and Thai deletion). Blood DNA samples were obtained from a volunteer group of 1235 ANC couples. They were assessed using quantitative real-time PCR to detect carriers of α(0)-thalassemia (SEA and Thai deletion). At-risk couples were identified, and further prenatal diagnosis by amniocentesis was implemented. Fetal DNA was isolated from the amniotic cells and characterized by quantitative real-time PCR to detect the α(0)-thalassemia mutation, which was reconfirmed using the droplet digital PCR method. Fifteen at-risk couples were identified. The timing of prenatal diagnosis was appropriate for all couples and four of the fetuses were diagnosed with Bart’s hydrops fetalis. The results were compatible with those calculated using the Hardy-Weinberg equation for a recessively inherited single gene disorder. The conclusion was that the fast-track strategy could shorten screening policy timelines, promoting early risk detection for couples and early prenatal diagnosis. The fast-track strategy might be beneficial for the prevention of hemoglobin Bart’s hydrops fetalis syndrome.
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11
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Lee TH, Hsu YC, Chang CL. Detection of SEA-type α-thalassemia in embryo biopsies by digital PCR. Taiwan J Obstet Gynecol 2017; 56:487-494. [DOI: 10.1016/j.tjog.2017.03.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/07/2017] [Indexed: 10/19/2022] Open
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12
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Butchbach MER. Applicability of digital PCR to the investigation of pediatric-onset genetic disorders. BIOMOLECULAR DETECTION AND QUANTIFICATION 2016; 10:9-14. [PMID: 27990344 PMCID: PMC5154671 DOI: 10.1016/j.bdq.2016.06.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 06/08/2016] [Accepted: 06/21/2016] [Indexed: 12/12/2022]
Abstract
Early-onset rare diseases have a strong impact on child healthcare even though the incidence of each of these diseases is relatively low. In order to better manage the care of these children, it is imperative to quickly diagnose the molecular bases for these disorders as well as to develop technologies with prognostic potential. Digital PCR (dPCR) is well suited for this role by providing an absolute quantification of the target DNA within a sample. This review illustrates how dPCR can be used to identify genes associated with pediatric-onset disorders, to identify copy number status of important disease-causing genes and variants and to quantify modifier genes. It is also a powerful technology to track changes in genomic biomarkers with disease progression. Based on its capability to accurately and reliably detect genomic alterations with high sensitivity and a large dynamic detection range, dPCR has the potential to become the tool of choice for the verification of pediatric disease-associated mutations identified by next generation sequencing, copy number determination and noninvasive prenatal screening.
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Affiliation(s)
- Matthew E R Butchbach
- Center for Applied Clinical Genomics, Nemours Biomedical Research, Nemours Alfred I. duPont Hospital for Children, Wilmington, DE, USA; Center for Pediatric Research, Nemours Biomedical Research, Nemours Alfred I. duPont Hospital for Children, Wilmington, DE, USA; Department of Biological Sciences, University of Delaware, Newark, DE, USA; Department of Pediatrics, Thomas Jefferson University, Philadelphia, PA, USA
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13
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Lee TY, Lai MI, Ramachandran V, Tan JAMA, Teh LK, Othman R, Hussein NH, George E. Rapid detection of α-thalassaemia variants using droplet digital PCR. Int J Lab Hematol 2016; 38:435-43. [DOI: 10.1111/ijlh.12520] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Accepted: 04/07/2016] [Indexed: 11/30/2022]
Affiliation(s)
- T.-Y. Lee
- Department of Pathology; Faculty of Medicine and Health Sciences; Universiti Putra Malaysia; Serdang Malaysia
| | - M.-I. Lai
- Department of Pathology; Faculty of Medicine and Health Sciences; Universiti Putra Malaysia; Serdang Malaysia
| | - V. Ramachandran
- Malaysian Research Institute on Ageing; Universiti Putra Malaysia; Serdang Malaysia
| | - J. A. M. A. Tan
- Department of Biomedical Science; Faculty of Medicine; University of Malaya; Kuala Lumpur Malaysia
| | - L.-K. Teh
- Department of Biomedical Science; Faculty of Science; Universiti Tunku Abdul Rahman; Kampar Malaysia
| | - R. Othman
- Department of Pathology; Hospital Kuala Lumpur; Kuala Lumpur Malaysia
| | - N. H. Hussein
- Department of Pathology; Hospital Kuala Lumpur; Kuala Lumpur Malaysia
| | - E. George
- Department of Pathology; Faculty of Medicine and Health Sciences; Universiti Putra Malaysia; Serdang Malaysia
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14
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Della Starza I, Nunes V, Cavalli M, De Novi LA, Ilari C, Apicella V, Vitale A, Testi AM, Del Giudice I, Chiaretti S, Foà R, Guarini A. Comparative analysis between RQ-PCR and digital-droplet-PCR of immunoglobulin/T-cell receptor gene rearrangements to monitor minimal residual disease in acute lymphoblastic leukaemia. Br J Haematol 2016; 174:541-9. [DOI: 10.1111/bjh.14082] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 02/06/2016] [Indexed: 01/09/2023]
Affiliation(s)
- Irene Della Starza
- Department of Cellular Biotechnologies and Haematology; “Sapienza” University of Rome; Rome Italy
| | - Vittorio Nunes
- Department of Cellular Biotechnologies and Haematology; “Sapienza” University of Rome; Rome Italy
| | - Marzia Cavalli
- Department of Cellular Biotechnologies and Haematology; “Sapienza” University of Rome; Rome Italy
| | - Lucia Anna De Novi
- Department of Cellular Biotechnologies and Haematology; “Sapienza” University of Rome; Rome Italy
| | - Caterina Ilari
- Department of Cellular Biotechnologies and Haematology; “Sapienza” University of Rome; Rome Italy
| | - Valerio Apicella
- Department of Cellular Biotechnologies and Haematology; “Sapienza” University of Rome; Rome Italy
| | - Antonella Vitale
- Department of Cellular Biotechnologies and Haematology; “Sapienza” University of Rome; Rome Italy
| | - Anna Maria Testi
- Department of Cellular Biotechnologies and Haematology; “Sapienza” University of Rome; Rome Italy
| | - Ilaria Del Giudice
- Department of Cellular Biotechnologies and Haematology; “Sapienza” University of Rome; Rome Italy
| | - Sabina Chiaretti
- Department of Cellular Biotechnologies and Haematology; “Sapienza” University of Rome; Rome Italy
| | - Robin Foà
- Department of Cellular Biotechnologies and Haematology; “Sapienza” University of Rome; Rome Italy
| | - Anna Guarini
- Department of Cellular Biotechnologies and Haematology; “Sapienza” University of Rome; Rome Italy
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15
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Khosravi A, Jalali-Far M, Saki N, Hosseini H, Galehdari H, Kiani-Ghalesardi O, Paridar M, Azarkeivan A, Magaji-Hamid K. Evaluation of α-Globin Gene Mutations Among Different Ethnic Groups in Khuzestan Province, Southwest Iran. Hemoglobin 2016; 40:113-7. [DOI: 10.3109/03630269.2015.1130720] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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16
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A Non-Invasive Droplet Digital PCR (ddPCR) Assay to Detect Paternal CFTR Mutations in the Cell-Free Fetal DNA (cffDNA) of Three Pregnancies at Risk of Cystic Fibrosis via Compound Heterozygosity. PLoS One 2015; 10:e0142729. [PMID: 26561302 PMCID: PMC4641687 DOI: 10.1371/journal.pone.0142729] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Accepted: 10/26/2015] [Indexed: 12/12/2022] Open
Abstract
Introduction Non-invasive prenatal diagnosis (NIPD) makes use of cell-free fetal DNA (cffDNA) in the mother’s bloodstream as an alternative to invasive sampling methods such as amniocentesis or CVS, which carry a 0.5–1% risk of fetal loss. We describe a droplet digital PCR (ddPCR) assay designed to inform the testing options for couples whose offspring are at risk of suffering from cystic fibrosis via compound heterozygosity. By detecting the presence or absence of the paternal mutation in the cffDNA, it is possible to predict whether the fetus will be an unaffected carrier (absence) or whether further invasive testing is indicated (presence). Methods We selected a family in which the parents were known to carry different mutated CFTR alleles as our test system. NIPD was performed for three of their pregnancies during the first trimester (at around 11–12 weeks of gestation). Taqman probes were designed against an amplicon in exon 11 of the CFTR gene, to quantify the proportion of mutant (ΔF508-MUT; FAM) and normal (ΔF508-NOR; VIC) alleles at position c.1521_1523 of the CFTR gene. Discussion The assay correctly and unambiguously recognized the ΔF508-MUT CFTR allele in the cffDNA of all three proband fetuses and none of the six unaffected control fetuses. In conclusion, the Bio-Rad QX100 was found to be a cost-effective and technically undemanding platform for designing bespoke NIPD assays.
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