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Zhu H, Zhu D, Wu K, He W, Li L, Li T, Liu L, Liu Z, Song X, Cheng W, Mo J, Yao Y, Li J. Establishment and evaluation of a qPCR method for the detection of pfmdr1 mutations in Plasmodium falciparum, the causal agent of fatal malaria. Diagn Microbiol Infect Dis 2024; 110:116400. [PMID: 38909426 DOI: 10.1016/j.diagmicrobio.2024.116400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Revised: 05/23/2024] [Accepted: 06/10/2024] [Indexed: 06/25/2024]
Abstract
Drug resistance surveillance is a major integral part of malaria control programs. Molecular methods play a pivotal role in drug resistance detection and related molecular research. This study aimed to develop a rapid and accurate detection method for drug resistance of Plasmodium falciparum (P. falciparum). A quantitative real-time PCR (qPCR) assay has been developed that identifies the mutation at locus A256T in the P.falciparum multi-drug resistance(pfmdr1) gene producing amino acid change at position 86. The results of 198 samples detected by qPCR were consistent with nested PCR and sequencing, giving an accuracy of 94.3%. The sensitivity, specificity, positive and negative predictive value of qPCR were 85.7%, 97.6%, 90.0% and 96.4%, respectively. The results of qPCR are basically consistent with the nested PCR, which is expected to replace the nested PCR as a new molecular biological method for drug resistance detection, providing reliable technical support for global malaria prevention and control.
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Affiliation(s)
- Huiyin Zhu
- Shiyan Key Laboratory of Virology, Hubei University of Medicine, Shiyan 442000, PR China; Department of Pediatrics, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, PR China
| | - Daiqian Zhu
- Shiyan Key Laboratory of Virology, Hubei University of Medicine, Shiyan 442000, PR China
| | - Kai Wu
- Wuhan Centers for Disease Prevention and Control, Wuhan 430024, PR China
| | - Wei He
- Jiangnan University, Wuxi 442000, PR China
| | - Liugen Li
- Shiyan Key Laboratory of Virology, Hubei University of Medicine, Shiyan 442000, PR China
| | - Tongfei Li
- Shiyan Key Laboratory of Virology, Hubei University of Medicine, Shiyan 442000, PR China
| | - Long Liu
- Shiyan Key Laboratory of Virology, Hubei University of Medicine, Shiyan 442000, PR China
| | - Zhixin Liu
- Shiyan Key Laboratory of Virology, Hubei University of Medicine, Shiyan 442000, PR China
| | - Xiaonan Song
- Shiyan Key Laboratory of Virology, Hubei University of Medicine, Shiyan 442000, PR China
| | - Weijia Cheng
- Shiyan Key Laboratory of Virology, Hubei University of Medicine, Shiyan 442000, PR China
| | - Jinyu Mo
- Shiyan Key Laboratory of Virology, Hubei University of Medicine, Shiyan 442000, PR China
| | - Yi Yao
- Department of Pediatrics, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, PR China
| | - Jian Li
- Shiyan Key Laboratory of Virology, Hubei University of Medicine, Shiyan 442000, PR China.
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Trung NT, Quyen DT, Hoan NX, Giang DP, Trang TTH, Velavan TP, Bang MH, Song LH. Rapid, low cost and sensitive detection of Calreticulin mutations by a PCR based amplicon length differentiation assay for diagnosis of myeloproliferative neoplasms. BMC MEDICAL GENETICS 2019; 20:115. [PMID: 31248375 PMCID: PMC6598322 DOI: 10.1186/s12881-019-0819-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 05/03/2019] [Indexed: 12/21/2022]
Abstract
BACKGROUND Calreticulin (CALR) gene mutations are currently recommended as biomarkers in diagnosis of patients with myeloproliferative neoplasms (MPN) with Jak2 V617F negative phenotype. Our aim was to establish a rapid, low cost and sensitive assay for identification of CALR gene mutations and to validate the diagnostic performance of the established assay in a patient cohort with different clinical MPN phenotypes. METHODS One hundred five Philadelphia-negative MPN patients, including polycythemia vera (PV), essential thrombocythaemia (ET), and primary myelofibrosis (PMF) were initially screened for JAK2 mutations by amplification-refractory mutation system (ARMS-PCR) methodology and were further subjected to detection of CALR gene mutations by our in-house assay, a PCR based amplicon length differentiation assay (PCR-ALDA). The PCR-ALDA methodology was compared with real time PCR and Sanger sequencing methods. Furthermore, the analytical sensitivity of the assay was established. RESULTS PCR - ALDA approach was able to detect and discriminate the pseudo-positive samples containing more than 1% CALR mutant alleles. CALR mutations were not detected in 63 Jak2 V617F positive cases in all three methods. In contrast, amongst 42 Jak2 V617F negative cases, both PCR-ALDA and Sanger sequencing coherently identified 12 CALR mutants compared to 10 CALR mutants detected by real-time PCR method. CONCLUSION PCR-ALDA can be utilized as an easy-to-use, rapid, low cost and sensitive tool in the detection of CALR mutations in Philadelphia-negative MPN patients.
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Affiliation(s)
- Ngo Tat Trung
- Centre for Genetic Consultation and Cancer Screening, 108 Institute of Clinical Medical and Pharmaceutical Sciences, Hanoi, Vietnam.,Vietnamese - German Center for Medical Research, 108 Institute of Clinical Medical and Pharmaceutical Sciences, No 1, Tran Hung Dao Street, Hai Ba Trung District, Hanoi, Vietnam.,Department of Molecular Biology, 108 Institute of Clinical Medical and Pharmaceutical Sciences, Hanoi, Vietnam
| | - Dao Thanh Quyen
- Vietnamese - German Center for Medical Research, 108 Institute of Clinical Medical and Pharmaceutical Sciences, No 1, Tran Hung Dao Street, Hai Ba Trung District, Hanoi, Vietnam.,Department of Molecular Biology, 108 Institute of Clinical Medical and Pharmaceutical Sciences, Hanoi, Vietnam
| | - Nghiem Xuan Hoan
- Vietnamese - German Center for Medical Research, 108 Institute of Clinical Medical and Pharmaceutical Sciences, No 1, Tran Hung Dao Street, Hai Ba Trung District, Hanoi, Vietnam.,Institute of Tropical Medicine, Universitätsklinikum Tübingen, Tübingen, Germany
| | - Dao Phuong Giang
- Vietnamese - German Center for Medical Research, 108 Institute of Clinical Medical and Pharmaceutical Sciences, No 1, Tran Hung Dao Street, Hai Ba Trung District, Hanoi, Vietnam.,Department of Molecular Biology, 108 Institute of Clinical Medical and Pharmaceutical Sciences, Hanoi, Vietnam
| | - Tran Thi Huyen Trang
- Centre for Genetic Consultation and Cancer Screening, 108 Institute of Clinical Medical and Pharmaceutical Sciences, Hanoi, Vietnam.,Vietnamese - German Center for Medical Research, 108 Institute of Clinical Medical and Pharmaceutical Sciences, No 1, Tran Hung Dao Street, Hai Ba Trung District, Hanoi, Vietnam.,Department of Molecular Biology, 108 Institute of Clinical Medical and Pharmaceutical Sciences, Hanoi, Vietnam
| | - Thirumalaisamy P Velavan
- Vietnamese - German Center for Medical Research, 108 Institute of Clinical Medical and Pharmaceutical Sciences, No 1, Tran Hung Dao Street, Hai Ba Trung District, Hanoi, Vietnam.,Institute of Tropical Medicine, Universitätsklinikum Tübingen, Tübingen, Germany
| | - Mai Hong Bang
- Vietnamese - German Center for Medical Research, 108 Institute of Clinical Medical and Pharmaceutical Sciences, No 1, Tran Hung Dao Street, Hai Ba Trung District, Hanoi, Vietnam.,Faculty of Gastroenterology, 108 Institute of Clinical Medical and Pharmaceutical Sciences, Hanoi, Vietnam
| | - Le Huu Song
- Vietnamese - German Center for Medical Research, 108 Institute of Clinical Medical and Pharmaceutical Sciences, No 1, Tran Hung Dao Street, Hai Ba Trung District, Hanoi, Vietnam. .,Faculty of Tropical and Infectious Diseases, 108 Institute of Clinical Medical and Pharmaceutical Sciences, Hanoi, Vietnam.
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Guo X, Su H, Zou X, Lai L, Lu Y, Wang C, Li Y, Hong J, Zhao M, Lin K, Lin J, Zeng Y, Yao X, Wang N, Chen W. Identification of
SLC20A2
deletions in patients with primary familial brain calcification. Clin Genet 2019; 96:53-60. [PMID: 30891739 DOI: 10.1111/cge.13540] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2019] [Revised: 02/20/2019] [Accepted: 03/13/2019] [Indexed: 12/17/2022]
Affiliation(s)
- Xin‐Xin Guo
- Department of Neurology and Institute of NeurologyThe First Affiliated Hospital of Fujian Medical University Fuzhou China
| | - Hui‐Zhen Su
- Department of Neurology and Institute of NeurologyThe First Affiliated Hospital of Fujian Medical University Fuzhou China
| | - Xiao‐Huan Zou
- Department of Neurology and Institute of NeurologyThe First Affiliated Hospital of Fujian Medical University Fuzhou China
| | - Lu‐Lu Lai
- Department of Neurology and Institute of NeurologyThe First Affiliated Hospital of Fujian Medical University Fuzhou China
| | - Ying‐Qian Lu
- Department of Neurology and Institute of NeurologyThe First Affiliated Hospital of Fujian Medical University Fuzhou China
| | - Chong Wang
- Department of Neurology and Institute of NeurologyThe First Affiliated Hospital of Fujian Medical University Fuzhou China
| | - Yun‐Lu Li
- Department of Neurology and Institute of NeurologyThe First Affiliated Hospital of Fujian Medical University Fuzhou China
| | - Jing‐Mei Hong
- Department of Neurology and Institute of NeurologyThe First Affiliated Hospital of Fujian Medical University Fuzhou China
| | - Miao Zhao
- Department of Neurology and Institute of NeurologyThe First Affiliated Hospital of Fujian Medical University Fuzhou China
| | - Kun‐Xin Lin
- Department of Neurology and Institute of NeurologyThe First Affiliated Hospital of Fujian Medical University Fuzhou China
| | - Jie Lin
- Department of Neurology and Institute of NeurologyThe First Affiliated Hospital of Fujian Medical University Fuzhou China
| | - Yi‐Heng Zeng
- Department of Neurology and Institute of NeurologyThe First Affiliated Hospital of Fujian Medical University Fuzhou China
| | - Xiang‐Ping Yao
- Department of Neurology and Institute of NeurologyThe First Affiliated Hospital of Fujian Medical University Fuzhou China
| | - Ning Wang
- Department of Neurology and Institute of NeurologyThe First Affiliated Hospital of Fujian Medical University Fuzhou China
- Fujian Key Laboratory of Molecular Neurology, Fujian Medical University Fuzhou China
| | - Wan‐Jin Chen
- Department of Neurology and Institute of NeurologyThe First Affiliated Hospital of Fujian Medical University Fuzhou China
- Fujian Key Laboratory of Molecular Neurology, Fujian Medical University Fuzhou China
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Cao G, Kong J, Xing Z, Tang Y, Zhang X, Xu X, Kang Z, Fang X, Guan M. Rapid detection of CALR type 1 and type 2 mutations using PNA-LNA clamping loop-mediated isothermal amplification on a CD-like microfluidic chip. Anal Chim Acta 2018; 1024:123-135. [PMID: 29776538 DOI: 10.1016/j.aca.2018.04.022] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 04/08/2018] [Accepted: 04/10/2018] [Indexed: 01/18/2023]
Abstract
Bleeding and thrombosis represent common complications in myeloproliferative neoplasms (MPN) and significantly contribute to morbidity and mortality. Molecular markers, including CALR mutations, were considered not only as diagnostic markers, but also as risk factors for bleeding and thrombosis associated with MPN, especially for patients in remote primary hospitals. We sought to develop an easy-to-use assay for the rapid detection of CALR type 1 (CALR-1) and type 2 (CALR-2) mutations in Philadelphia chromosome-negative MPN patients. Peptide nucleic acid-locked nucleic acid (PNA-LNA) clamping loop-mediated isothermal amplification (LAMP) assays were established, which were integrated into a centrifugal compact disc (CD) microfluidic platform. A total of 158 clinical blood samples were tested simultaneously by this microfluidic platform and an in-house real time PCR assay. The detection performance of the LAMP arrays was validated and conflicting results were identified by Sanger sequencing. The results suggested that the LAMP methods we developed exhibited good sensitivity, specificity, and precision. By real time fluorescence assay the detection limit for CALR-1 and CALR-2 mutations could reach as low as 1% and 0.5% respectively, and 10% and 5% respectively by visual method. There were no nonspecific background amplifications among different detection systems. For the CALR-1 and CALR-2 LAMP detection systems, intra-batch CV values of 1% mutated plasmid were 10.56% and 10.51% respectively, and the inter-batch CV values were 19.55% and 18.39%, respectively. The products were all analyzed by melting curve analysis and electrophoresis followed by Sanger sequencing analysis, which were consistent with the database sequences. The microfluidic platform could complete rapid detection of CALR-1/2 mutations within 60 min. The results of clinical samples detected by our CD-like microfluidic chipLAMP assay and rtPCR assay suggested that 133 samples were CALR wild type, 15 were CALR-1 mutation type, and 9 were CALR-2 mutation type. The correlation coefficient value (Kendall's tau_b) of the two assays was 0.99. Interestingly, by the newly established detection platform, we were surprised to find that one patient of Chinese origin harbored both CALR-1 and CALR-2 mutations. This result was verified by Sanger sequencing analysis. The LAMP detection systems developed herein displayed good sensitivity, specificity, and stability. Additionally, the detection results could be directly judged by color changes of the reaction systems without any auxiliary equipment. Thus, the platform we developed has the potential of being widely used in remote and economically undeveloped areas in the future.
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Affiliation(s)
- Guojun Cao
- Department of Laboratory Medicine, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai 200040, PR China
| | - Jilie Kong
- Department of Chemistry and Institutes of Biomedical Sciences, Fudan University, Shanghai 200433, PR China; Shanghai Suxin Co. Ltd., PR China
| | - Zhifang Xing
- Department of Blood Transfusion, Minhang Hospital, Fudan University, Shanghai 201199, PR China
| | - Yigui Tang
- Department of Laboratory Medicine, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai 200040, PR China
| | - Xinju Zhang
- Center of Laboratory, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai 200040, PR China
| | - Xiao Xu
- Center of Laboratory, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai 200040, PR China
| | - Zhihua Kang
- Department of Laboratory Medicine, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai 200040, PR China
| | - Xueen Fang
- Department of Chemistry and Institutes of Biomedical Sciences, Fudan University, Shanghai 200433, PR China; Shanghai Suxin Co. Ltd., PR China.
| | - Ming Guan
- Department of Laboratory Medicine, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai 200040, PR China.
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Finazzi MC, Lussana F, Salmoiraghi S, Spinelli O, Rambaldi A. Detection of driver and subclonal mutations in myelofibrosis: clinical impact on pharmacologic and transplant based treatment strategies. Expert Rev Hematol 2017; 10:627-636. [PMID: 28504024 DOI: 10.1080/17474086.2017.1331125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
INTRODUCTION Myelofibrosis (MF) is the most aggressive form among Philadelphia negative (Ph-) myeloproliferative neoplasms (MPNs). In the last years, the mutational landscape of MF has expanded remarkably by the identification of additional recurrent mutations, called subclonal mutations. Areas covered: Here we describe the available data about the currently identified subclonal mutations and their prognostic value in MF patients. We also review the practical value of including such molecular information in available prognostic models for both outcome prediction and possibly treatment decision with regards to transplant indication. Lastly, we covered the available data on the application of molecular markers for minimal residual disease (MRD) monitoring after transplantation. Expert commentary: The demonstration of the prognostic value of additional mutations suggests to define this molecular profile at diagnosis and when an allogeneic transplant can be advised, particularly in younger patients. The presence of molecular markers might offer the possibility to evaluate the depth of remission and to monitor MRD after transplantation. Prospective clinical studies are needed to validate the use of this molecular data in the routine clinical practice.
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Affiliation(s)
- Maria Chiara Finazzi
- a Hematology and Bone Marrow Transplant Unit, Azienda Socio Sanitaria Territoriale Papa Giovanni XXIII , Bergamo , Italy
| | - Federico Lussana
- a Hematology and Bone Marrow Transplant Unit, Azienda Socio Sanitaria Territoriale Papa Giovanni XXIII , Bergamo , Italy
| | - Silvia Salmoiraghi
- a Hematology and Bone Marrow Transplant Unit, Azienda Socio Sanitaria Territoriale Papa Giovanni XXIII , Bergamo , Italy
| | - Orietta Spinelli
- a Hematology and Bone Marrow Transplant Unit, Azienda Socio Sanitaria Territoriale Papa Giovanni XXIII , Bergamo , Italy
| | - Alessandro Rambaldi
- a Hematology and Bone Marrow Transplant Unit, Azienda Socio Sanitaria Territoriale Papa Giovanni XXIII , Bergamo , Italy.,b Department of Oncology and Hematology , Università degli Studi di Milano , Milan , Italy
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Monitoring Minimal Residual Disease in the Myeloproliferative Neoplasms: Current Applications and Emerging Approaches. BIOMED RESEARCH INTERNATIONAL 2016; 2016:7241591. [PMID: 27840830 PMCID: PMC5093244 DOI: 10.1155/2016/7241591] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Accepted: 10/05/2016] [Indexed: 11/18/2022]
Abstract
The presence of acquired mutations within the JAK2, CALR, and MPL genes in the majority of patients with myeloproliferative neoplasms (MPN) affords the opportunity to utilise these mutations as markers of minimal residual disease (MRD). Reduction of the mutated allele burden has been reported in response to a number of therapeutic modalities including interferon, JAK inhibitors, and allogeneic stem cell transplantation; novel therapies in development will also require assessment of efficacy. Real-time quantitative PCR has been widely adopted for recurrent point mutations with assays demonstrating the specificity, sensitivity, and reproducibility required for clinical utility. More recently, approaches such as digital PCR have demonstrated comparable, if not improved, assay characteristics and are likely to play an increasing role in MRD monitoring. While next-generation sequencing is increasingly valuable as a tool for diagnosis of MPN, its role in the assessment of MRD requires further evaluation.
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Abildinova G, Abdrakhmanova Z, Tuchinsky H, Nesher E, Pinhasov A, Raskin L. Fast detection of deletion breakpoints using quantitative PCR. Genet Mol Biol 2016; 39:365-9. [PMID: 27560363 PMCID: PMC5004823 DOI: 10.1590/1678-4685-gmb-2015-0159] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Accepted: 12/29/2015] [Indexed: 11/22/2022] Open
Abstract
The routine detection of large and medium copy number variants (CNVs) is well
established. Hemizygotic deletions or duplications in the large Duchenne muscular
dystrophy DMD gene responsible for Duchenne and Becker muscular
dystrophies are routinely identified using multiple ligation probe amplification and
array-based comparative genomic hybridization. These methods only map deleted or
duplicated exons, without providing the exact location of breakpoints. Commonly used
methods for the detection of CNV breakpoints include long-range PCR and primer
walking, their success being limited by the deletion size, GC content and presence of
DNA repeats. Here, we present a strategy for detecting the breakpoints of medium and
large CNVs regardless of their size. The hemizygous deletion of exons 45-50 in the
DMD gene and the large autosomal heterozygous
PARK2 deletion were used to demonstrate the workflow that relies
on real-time quantitative PCR to narrow down the deletion region and Sanger
sequencing for breakpoint confirmation. The strategy is fast, reliable and
cost-efficient, making it amenable to widespread use in genetic laboratories.
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Affiliation(s)
| | | | - Helena Tuchinsky
- Department of Molecular Biology, Ariel University, Ariel, Israel
| | - Elimelech Nesher
- Department of Molecular Biology, Ariel University, Ariel, Israel
| | - Albert Pinhasov
- Department of Molecular Biology, Ariel University, Ariel, Israel
| | - Leon Raskin
- Department of Medicine, Vanderbilt University, Nashville, TN, USA
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