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Noh ES, Kang HS, Kim EM, Noh JK, Park JY, Choi TJ, Kang JH. Rapid Differentiation of Seven Species of Anguilla Using PNA Clamping-based Asymmetric PCR with Fluorescence Melting Curve Analysis. BIOCHIP JOURNAL 2018. [DOI: 10.1007/s13206-017-2106-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Kim HJ, Rim J, Jang CH. Liquid-Crystal-Based Immunosensor for Diagnosis of Tuberculosis in Clinical Specimens. ACS APPLIED MATERIALS & INTERFACES 2017; 9:21209-21215. [PMID: 28617582 DOI: 10.1021/acsami.7b06189] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Tuberculosis (TB) is a serious global health problem, although it is easily preventable and curable. The prevalence of TB is caused by a lack of simple, rapid, cheap, and effective TB diagnostic tests. In this study, we have established a novel liquid crystal (LC)-based immunosensor to diagnose TB in clinical specimens. The clinical serum samples were incubated on a TB antigen-immobilized substrate, and their optical LC responses were observed using a polarized light microscope. Specific binding of anti-TB antibodies to the TB antigen-immobilized surface only occurred in clinical specimens from TB patients, inducing the disruption of the orientation of LCs. This was followed by the distinctive change in the optical appearance of LCs from uniform to random. However, when clinical serum samples from healthy people or latent TB patients were incubated, the orientation of LCs remained uniform. Through the change of optical LC images, in 76% of TB patients, this essay correctly identified the patients as having antibodies to TB in their serums. 91% of healthy people free of TB were correctly identified as not having antibodies to TB. Thus, this LC-based immunosensor is a promising platform, particularly in clinical TB diagnostics, which does not require complicated preparation of clinical specimens or complex instrumentation.
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Affiliation(s)
- Hyeong Jin Kim
- Department of Chemistry, Gachon University , Seongnam-Daero 1342, Bokjeong-Dong, Sujeong-Gu, Seongnam-Si, Gyeonggi-Do 13120, Korea
| | - Jinseob Rim
- Department of Chemistry, Gachon University , Seongnam-Daero 1342, Bokjeong-Dong, Sujeong-Gu, Seongnam-Si, Gyeonggi-Do 13120, Korea
| | - Chang-Hyun Jang
- Department of Chemistry, Gachon University , Seongnam-Daero 1342, Bokjeong-Dong, Sujeong-Gu, Seongnam-Si, Gyeonggi-Do 13120, Korea
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Rim J, Kim HJ, Jang CH. Parallel Detection of Anti-Tuberculosis Antibodies upon a Liquid Crystal-based Optical Sensor. B KOREAN CHEM SOC 2016. [DOI: 10.1002/bkcs.10922] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jinseob Rim
- Department of Chemistry; Gachon University; Seongnam 13120 Korea
| | - Hyeong Jin Kim
- Department of Chemistry; Gachon University; Seongnam 13120 Korea
| | - Chang-Hyun Jang
- Department of Chemistry; Gachon University; Seongnam 13120 Korea
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Kim K, Hong SH, Kim BJ, Kim BR, Lee SY, Kim GN, Shim TS, Kook YH, Kim BJ. Separation of Mycobacterium abscessus into subspecies or genotype level by direct application of peptide nucleic acid multi-probe- real-time PCR method into sputa samples. BMC Infect Dis 2015; 15:325. [PMID: 26259717 PMCID: PMC4531893 DOI: 10.1186/s12879-015-1076-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Accepted: 07/31/2015] [Indexed: 11/30/2022] Open
Abstract
Background Recently, we introduced a novel peptide nucleic acid (PNA) multi-probe real time PCR method targeting the hsp65 gene (hsp65 PNA RT-PCR) to distinguish Mycobacterium abscessus groups. Methods Here, we evaluated the usefulness of the hsp65 PNA RT-PCR for the direct identification of the M. abscessus group at the subspecies and genotype levels from sputa samples. The method was applied to total sputa DNA from 60 different patients who were identified as having mycobacterial infections via rpoB PCR restriction analysis of the same cultures. Results The hsp65 PNA RT-PCR method had higher sensitivity than the multi-probe real-time PCR assay targeting hsp65 (HMPRT-PCR) for the detection of M. abscessus from sputum [96.7 % (29/30 samples) vs. 70 % (21/30 samples); 100 % specificity]. Conclusions These results suggest that the PNA-based method is feasible for the detection of M. abscessus members not only from cultures but also directly from sputa. Electronic supplementary material The online version of this article (doi:10.1186/s12879-015-1076-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Kijeong Kim
- Department of Microbiology, Chung-Ang University College of Medicine, Seoul, 156-756, Republic of Korea.
| | - Seok-Hyun Hong
- Department of Biomedical Sciences, Microbiology and Immunology, Cancer Research Institute, and Liver Research Institute, Seoul National University College of Medicine, 28 Yongon-dong, Chongno-gu, Seoul, 110-799, Republic of Korea.
| | - Byoung-Jun Kim
- Department of Biomedical Sciences, Microbiology and Immunology, Cancer Research Institute, and Liver Research Institute, Seoul National University College of Medicine, 28 Yongon-dong, Chongno-gu, Seoul, 110-799, Republic of Korea.
| | - Bo-Ram Kim
- Department of Biomedical Sciences, Microbiology and Immunology, Cancer Research Institute, and Liver Research Institute, Seoul National University College of Medicine, 28 Yongon-dong, Chongno-gu, Seoul, 110-799, Republic of Korea.
| | - So-Young Lee
- Department of Biomedical Sciences, Microbiology and Immunology, Cancer Research Institute, and Liver Research Institute, Seoul National University College of Medicine, 28 Yongon-dong, Chongno-gu, Seoul, 110-799, Republic of Korea.
| | - Ga-Na Kim
- Department of Biomedical Sciences, Microbiology and Immunology, Cancer Research Institute, and Liver Research Institute, Seoul National University College of Medicine, 28 Yongon-dong, Chongno-gu, Seoul, 110-799, Republic of Korea.
| | - Tae Sun Shim
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea.
| | - Yoon-Hoh Kook
- Department of Biomedical Sciences, Microbiology and Immunology, Cancer Research Institute, and Liver Research Institute, Seoul National University College of Medicine, 28 Yongon-dong, Chongno-gu, Seoul, 110-799, Republic of Korea.
| | - Bum-Joon Kim
- Department of Biomedical Sciences, Microbiology and Immunology, Cancer Research Institute, and Liver Research Institute, Seoul National University College of Medicine, 28 Yongon-dong, Chongno-gu, Seoul, 110-799, Republic of Korea.
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Ahn JJ, Kim Y, Lee SY, Hong JY, Kim GW, Hwang SY. Fluorescence melting curve analysis using self-quenching dual-labeled peptide nucleic acid probes for simultaneously identifying multiple DNA sequences. Anal Biochem 2015; 484:143-7. [PMID: 26049100 DOI: 10.1016/j.ab.2015.05.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Revised: 05/30/2015] [Accepted: 05/31/2015] [Indexed: 01/11/2023]
Abstract
Previous fluorescence melting curve analysis (FMCA) used intercalating dyes, and this method has restricted application. Therefore, FMCA methods such as probe-based FMCA and molecular beacons were studied. However, the usual dual-labeled probes do not possess adequate fluorescence quenching ability and sufficient specificity, and molecular beacons with the necessary stem structures are hard to design. Therefore, we have developed a peptide nucleic acid (PNA)-based FMCA method. PNA oligonucleotide can have a much higher melting temperature (Tm) value than DNA. Therefore, short PNA probes can have adequate Tm values for FMCA, and short probes can have higher specificity and accuracy in FMCA. Moreover, dual-labeled PNA probes have self-quenching ability via single-strand base stacking, which makes PNA more favorable. In addition, this method can facilitate simultaneous identification of multiple DNA templates. In conventional real-time polymerase chain reaction (PCR), one fluorescence channel can identify only one DNA template. However, this method uses two fluorescence channels to detect three types of DNA. Experiments were performed with one to three different DNA sequences mixed in a single tube. This method can be used to identify multiple DNA sequences in a single tube with high specificity and high clarity.
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Affiliation(s)
- Jeong Jin Ahn
- Department of Bio-Nanotechnology, Hanyang University, Sangnok-gu, Ansan, Gyeonggi-do 426-791, Republic of Korea
| | - Youngjoo Kim
- Department of Bio-Nanotechnology, Hanyang University, Sangnok-gu, Ansan, Gyeonggi-do 426-791, Republic of Korea
| | - Seung Yong Lee
- Department of Bio-Nanotechnology, Hanyang University, Sangnok-gu, Ansan, Gyeonggi-do 426-791, Republic of Korea
| | - Ji Young Hong
- Department of Bio-Nanotechnology, Hanyang University, Sangnok-gu, Ansan, Gyeonggi-do 426-791, Republic of Korea
| | - Gi Won Kim
- Department of Molecular and Life Science, Hanyang University, Sangnok-gu, Ansan, Gyeonggi-do 426-791, Republic of Korea
| | - Seung Yong Hwang
- Department of Bio-Nanotechnology, Hanyang University, Sangnok-gu, Ansan, Gyeonggi-do 426-791, Republic of Korea; Department of Molecular and Life Science, Hanyang University, Sangnok-gu, Ansan, Gyeonggi-do 426-791, Republic of Korea.
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Development of a peptide nucleic acid-based multiprobe real-time PCR method targeting the hsp65 gene for differentiation among Mycobacterium abscessus strains. J Clin Microbiol 2015; 53:1403-5. [PMID: 25653415 DOI: 10.1128/jcm.03424-14] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Recently, the need to distinguish between members of the Mycobacterium abscessus group has gained increasing attention. Here, we introduced a novel peptide nucleic acid (PNA) real-time PCR method targeting the hsp65 gene in order to distinguish between four subspecies within the M. abscessus group (M. abscessus and 3 types of M. massiliense).
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