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Hokazono E, Fukumoto S, Uchiumi T, Osawa S. Pyrophosphate detection method using 5-Br-PAPS to detect nucleic acid amplification - Application to LAMP method. Anal Biochem 2024; 684:115371. [PMID: 37940014 DOI: 10.1016/j.ab.2023.115371] [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: 08/24/2023] [Revised: 10/22/2023] [Accepted: 10/26/2023] [Indexed: 11/10/2023]
Abstract
Genetic testing has been increasingly used in several fields. In many applications, nucleic acid amplification technology is required. However, current methods to detect nucleic acid amplification require expensive reagents and special equipment or exhibit limited sensitivity, which hinders their use. To address this issue, this study reports an assay method for detecting occurrence of acid amplification in post-amplification samples using pyrophosphate, a highly sensitive byproduct of nucleic acid amplification. The method proposed requires two reagents and an automated analyzer. First, hydrogen peroxide is derived from pyrophosphate, an indicator of nucleic acid amplification, and the oxidizing power of hydrogen peroxide is used to produce Fe (III) from Fe (II). The specific metal chelator 5-Br-PAPS forms a complex with the trivalent iron produced, resulting in a highly sensitive coloration. The within-run reproducibility of our method (n = 20) was less than 3.67% at each concentration tested, and the detection limit was 0.075 μmol/L, sufficient for quantitative analysis. The technique described could detect pyrophosphate in a sample that was amplified using the loop-mediated isothermal amplification method after only 10 min. Therefore, the proposed method has the potential to be a new, rapid, and simple detection technique for amplified nucleic acids.
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Affiliation(s)
- Eisaku Hokazono
- Division of Medical Sciences and Technology Department of Health Sciences, Faculty of Medical Sciences, Kyushu University, Japan.
| | - Saori Fukumoto
- Division of Medical Sciences and Technology Department of Health Sciences, Faculty of Medical Sciences, Kyushu University, Japan
| | - Takeshi Uchiumi
- Division of Medical Sciences and Technology Department of Health Sciences, Faculty of Medical Sciences, Kyushu University, Japan
| | - Susumu Osawa
- Research Center for Micro Blood Analysis, Leisure, Inc., Japan
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Takada Y, Shibuta T, Hatano M, Sato K, Koga M, Ishibashi A, Harada T, Hisatomi T, Shimura H, Fukushima N, Leecharoenkiat K, Chamnanchanunt S, Svasti S, Fucharoen S, Umemura T. Pre-Analytical Modification of Serum miRNAs: Diagnostic Reliability of Serum miRNAs in Hemolytic Diseases. J Clin Med 2021; 10:jcm10215045. [PMID: 34768564 PMCID: PMC8584813 DOI: 10.3390/jcm10215045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Revised: 10/18/2021] [Accepted: 10/25/2021] [Indexed: 01/05/2023] Open
Abstract
Circulating microRNAs (miRNAs) are useful biomarkers of hemolysis. Since blood cells are the main origins of circulating miRNAs, we evaluated blood cell-related pre-analytical modification of the miRNA signatures during blood drawing and serum processing. The levels of miRNA before and after ex vivo blood drawing were analyzed with the reverse transcriptase-based polymerase chain reaction method. Furthermore, the changes of miRNA signatures caused by different time-lag between blood drawing and serum preparation by 24 h were evaluated. Finally, we compared the miRNA levels between leftover samples and samples of hemolytic diseases. Blood drawing procedure induced increments of red blood cell (RBC)-related miRNAs (miR-451a, miR-486) about 2-fold. One hour standing of blood samples before serum separation induced almost the same increases in RBC-related miRNAs. To test the clinical usefulness of miR-451a as a biomarker of hemolytic diseases, we analyzed miRNAs of samples from 10 normal subjects, 30 leftover samples in the clinical laboratory, and 20 samples from patients with hemolytic diseases. Serum miR-451a significantly increased in patients with hemolytic anemia more than the levels of pre-analytical modification. In conclusion, the pre-analytical modification of serum miRNAs did not disturb the usefulness of RBC-derived miRNAs as biomarkers of hemolytic diseases.
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Affiliation(s)
- Yukichi Takada
- Department of Medical Technology and Sciences, International University of Health and Welfare, Okawa 831-8501, Japan; (Y.T.); (T.S.); (M.H.); (K.S.); (H.S.)
| | - Tatsuki Shibuta
- Department of Medical Technology and Sciences, International University of Health and Welfare, Okawa 831-8501, Japan; (Y.T.); (T.S.); (M.H.); (K.S.); (H.S.)
| | - Mayu Hatano
- Department of Medical Technology and Sciences, International University of Health and Welfare, Okawa 831-8501, Japan; (Y.T.); (T.S.); (M.H.); (K.S.); (H.S.)
| | - Kenichi Sato
- Department of Medical Technology and Sciences, International University of Health and Welfare, Okawa 831-8501, Japan; (Y.T.); (T.S.); (M.H.); (K.S.); (H.S.)
| | - Mari Koga
- Clinical Laboratory, Kouhoukai Takagi Hospital, Okawa 831-8501, Japan; (M.K.); (A.I.); (T.H.)
| | - Ayaka Ishibashi
- Clinical Laboratory, Kouhoukai Takagi Hospital, Okawa 831-8501, Japan; (M.K.); (A.I.); (T.H.)
| | - Tetsuhiro Harada
- Clinical Laboratory, Kouhoukai Takagi Hospital, Okawa 831-8501, Japan; (M.K.); (A.I.); (T.H.)
| | | | - Hanae Shimura
- Department of Medical Technology and Sciences, International University of Health and Welfare, Okawa 831-8501, Japan; (Y.T.); (T.S.); (M.H.); (K.S.); (H.S.)
| | - Noriyasu Fukushima
- Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima 734-8553, Japan;
| | - Kamonlak Leecharoenkiat
- Department of Clinical Microscope, Faculty of Medical Sciences, Chulalongkorn University, Bangkok 10330, Thailand;
| | | | - Saovaros Svasti
- Thalassemia Research Center, Institute of Molecular Biosciences, Mahidol University, Salaya, Nakhon Pathom 73130, Thailand; (S.S.); (S.F.)
| | - Suthat Fucharoen
- Thalassemia Research Center, Institute of Molecular Biosciences, Mahidol University, Salaya, Nakhon Pathom 73130, Thailand; (S.S.); (S.F.)
| | - Tsukuru Umemura
- Department of Medical Technology and Sciences, International University of Health and Welfare, Okawa 831-8501, Japan; (Y.T.); (T.S.); (M.H.); (K.S.); (H.S.)
- Clinical Laboratory, Kouhoukai Takagi Hospital, Okawa 831-8501, Japan; (M.K.); (A.I.); (T.H.)
- Correspondence: ; Tel.: +81-0944-89-2000
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He J, Han J, Xin C. WITHDRAWN: Research on the "integration of physical activity and medicine" prevention scheme of chronic disease population based on health risk assessment. Work 2021:WOR205363. [PMID: 34308881 DOI: 10.3233/wor-205363] [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: 11/15/2022] Open
Abstract
Ahead of Print article withdrawn by publisher.
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Affiliation(s)
- Jiali He
- Sports Science College of Lingnan Normal University, Zhangjiang, China
| | - Jinyong Han
- Sports Science College of Lingnan Normal University, Zhangjiang, China
| | - Changcheng Xin
- Graduate School, Jose Rizal University, Mandaluyong City, Metro Manila, Philippines
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