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Taira C, Matsuda K, Takeichi N, Furukawa S, Sugano M, Uehara T, Okumura N, Honda T. Rapid ABO genotyping by high-speed droplet allele-specific PCR using crude samples. J Clin Lab Anal 2017; 32. [PMID: 28295603 DOI: 10.1002/jcla.22196] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 02/13/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND ABO genotyping has common tools for personal identification of forensic and transplantation field. We developed a new method based on a droplet allele-specific PCR (droplet-AS-PCR) that enabled rapid PCR amplification. We attempted rapid ABO genotyping using crude DNA isolated from dried blood and buccal cells. METHODS We designed allele-specific primers for three SNPs (at nucleotides 261, 526, and 803) in exons 6 and 7 of the ABO gene. We pretreated dried blood and buccal cells with proteinase K, and obtained crude DNAs without DNA purification. RESULTS Droplet-AS-PCR allowed specific amplification of the SNPs at the three loci using crude DNA, with results similar to those for DNA extracted from fresh peripheral blood. The sensitivity of the methods was 5%-10%. The genotyping of extracted DNA and crude DNA were completed within 8 and 9 minutes, respectively. The genotypes determined by the droplet-AS-PCR method were always consistent with those obtained by direct sequencing. CONCLUSION The droplet-AS-PCR method enabled rapid and specific amplification of three SNPs of the ABO gene from crude DNA treated with proteinase K. ABO genotyping by the droplet-AS-PCR has the potential to be applied to various fields including a forensic medicine and transplantation medical care.
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Affiliation(s)
- Chiaki Taira
- Laboratory of Clinical Chemistry and Immunology, Department of Biomedical Laboratory Sciences, School of Health Sciences, Shinshu University, Matsumoto, Japan
| | - Kazuyuki Matsuda
- Department of Laboratory Medicine, Shinshu University Hospital, Matsumoto, Japan
| | - Naoya Takeichi
- Department of Laboratory Medicine, Shinshu University Hospital, Matsumoto, Japan
| | - Satomi Furukawa
- Department of Laboratory Medicine, Shinshu University Hospital, Matsumoto, Japan
| | - Mitsutoshi Sugano
- Department of Laboratory Medicine, Shinshu University Hospital, Matsumoto, Japan
| | - Takeshi Uehara
- Department of Laboratory Medicine, Shinshu University Hospital, Matsumoto, Japan
| | - Nobuo Okumura
- Laboratory of Clinical Chemistry and Immunology, Department of Biomedical Laboratory Sciences, School of Health Sciences, Shinshu University, Matsumoto, Japan
| | - Takayuki Honda
- Department of Laboratory Medicine, Shinshu University Hospital, Matsumoto, Japan
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Molecular immunohaematology round table discussions at the AABB Annual Meeting, Anaheim 2015. BLOOD TRANSFUSION = TRASFUSIONE DEL SANGUE 2016; 14:557-565. [PMID: 27483480 DOI: 10.2450/2016.0063-16] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 05/17/2016] [Indexed: 12/16/2022]
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Lang K, Wagner I, Schöne B, Schöfl G, Birkner K, Hofmann JA, Sauter J, Pingel J, Böhme I, Schmidt AH, Lange V. ABO allele-level frequency estimation based on population-scale genotyping by next generation sequencing. BMC Genomics 2016; 17:374. [PMID: 27207383 PMCID: PMC4874024 DOI: 10.1186/s12864-016-2687-1] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Accepted: 04/28/2016] [Indexed: 03/15/2023] Open
Abstract
BACKGROUND The characterization of the ABO blood group status is vital for blood transfusion and solid organ transplantation. Several methods for the molecular characterization of the ABO gene, which encodes the alleles that give rise to the different ABO blood groups, have been described. However, the application of those methods has so far been restricted to selected samples and not been applied to population-scale analysis. RESULTS We describe a cost-effective method for high-throughput genotyping of the ABO system by next generation sequencing. Sample specific barcodes and sequencing adaptors are introduced during PCR, rendering the products suitable for direct sequencing on Illumina MiSeq or HiSeq instruments. Complete sequence coverage of exons 6 and 7 enables molecular discrimination of the ABO subgroups and many alleles. The workflow was applied to ABO genotype more than a million samples. We report the allele group frequencies calculated on a subset of more than 110,000 sampled individuals of German origin. Further we discuss the potential of the workflow for high resolution genotyping taking the observed allele group frequencies into account. Finally, sequence analysis revealed 287 distinct so far not described alleles of which the most abundant one was identified in 174 samples. CONCLUSIONS The described workflow delivers high resolution ABO genotyping at low cost enabling population-scale molecular ABO characterization.
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Affiliation(s)
- Kathrin Lang
- DKMS Life Science Lab, Blasewitzer Str. 43, 01307, Dresden, Germany
| | - Ines Wagner
- DKMS Life Science Lab, Blasewitzer Str. 43, 01307, Dresden, Germany
| | - Bianca Schöne
- DKMS Life Science Lab, Blasewitzer Str. 43, 01307, Dresden, Germany
| | - Gerhard Schöfl
- DKMS Life Science Lab, Blasewitzer Str. 43, 01307, Dresden, Germany
| | - Kerstin Birkner
- DKMS Life Science Lab, Blasewitzer Str. 43, 01307, Dresden, Germany
| | | | | | | | - Irina Böhme
- DKMS Life Science Lab, Blasewitzer Str. 43, 01307, Dresden, Germany
| | - Alexander H Schmidt
- DKMS Life Science Lab, Blasewitzer Str. 43, 01307, Dresden, Germany.,DKMS, Kressbach 1, 72072, Tübingen, Germany
| | - Vinzenz Lange
- DKMS Life Science Lab, Blasewitzer Str. 43, 01307, Dresden, Germany.
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Zhang C, Zhu J, Yang J, Wan Y, Ma T, Cui Y. Determination of ABO blood group genotypes using the real‑time loop‑mediated isothermal amplification method. Mol Med Rep 2015; 12:5963-6. [PMID: 26238310 PMCID: PMC4581819 DOI: 10.3892/mmr.2015.4144] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Accepted: 06/17/2015] [Indexed: 01/19/2023] Open
Abstract
ABO genotyping is commonly used in several situations, including blood transfusion, personal identification and disease detection. The present study developed a novel method for ABO genotyping, using loop‑mediated isothermal amplification (LAMP). This method allows the simultaneous determination of six ABO genotypes under 40 min at a constant temperature of 62˚C. The genotypes of 101 blood samples were determined to be AA (n=6), AO (n=38), BB (n=12), BO (n=29), AB (n=8) and OO (n=8) by the LAMP assay. The results were compared with the phenotypes determined by serological assay and the genotypes determined by direct sequencing, and no discrepancies were observed. This novel and rapid method, with good accuracy and reasonably cost effective, provides a supplement to routine serological ABO typing and may also be useful in other point‑of‑care testing.
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Affiliation(s)
- Chao Zhang
- College of Life Sciences, Northwest University, Xi'an, Shaanxi 710069, P.R. China
| | - Juanli Zhu
- College of Life Sciences, Northwest University, Xi'an, Shaanxi 710069, P.R. China
| | - Jiangcun Yang
- Department of Transfusion Medicine, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi 710068, P.R. China
| | - Yinsheng Wan
- Department of Biology, Providence College, Providence, RI 02918, USA
| | - Ting Ma
- College of Life Sciences, Northwest University, Xi'an, Shaanxi 710069, P.R. China
| | - Yali Cui
- College of Life Sciences, Northwest University, Xi'an, Shaanxi 710069, P.R. China
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Applying molecular immunohaematology to regularly transfused thalassaemic patients in Thailand. BLOOD TRANSFUSION = TRASFUSIONE DEL SANGUE 2013; 12:28-35. [PMID: 24120606 DOI: 10.2450/2013.0058-13] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Accepted: 04/18/2013] [Indexed: 01/19/2023]
Abstract
BACKGROUND Red blood cell transfusion is the principal therapy in patients with severe thalassaemias and haemoglobinopathies, which are prevalent in Thailand. Serological red blood cell typing is confounded by chronic transfusion, because of circulating donor red blood cells. We evaluated the concordance of serological phenotypes between a routine and a reference laboratory and with red cell genotyping. MATERIALS AND METHODS Ten consecutive Thai patients with β-thalassemia major who received regular transfusions were enrolled in Thailand. Phenotypes were tested serologically at Songklanagarind Hospital and at the National Institutes of Health. Red blood cell genotyping was performed with commercially available kits and a platform. RESULTS In only three patients was the red cell genotyping concordant with the serological phenotypes for five antithetical antigen pairs in four blood group systems at the two institutions. At the National Institutes of Health, 32 of the 100 serological tests yielded invalid or discrepant results. The positive predictive value of serology did not reach 1 for any blood group system at either of the two institutions in this set of ten patients. DISCUSSION Within this small study, numerous discrepancies were observed between serological phenotypes at the two institutes; red cell genotyping enabled determination of the blood group when serology failed due to transfused red blood cells. We question the utility of serological tests in regularly transfused paediatric patients and propose relying solely on red cell genotyping, which requires training for laboratory personnel and physicians. Red cell genotyping outperformed red cell serology by an order of magnitude in regularly transfused patients.
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