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Son J, Kim SH, Cha BS, Lee ES, Kim S, Park KS. Primer exchange reaction-coupled transcription isothermal amplification as a sensitive biomolecular assay. Chem Commun (Camb) 2024; 60:4565-4568. [PMID: 38572617 DOI: 10.1039/d4cc00665h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2024]
Abstract
We devised a novel strategy that relies on a combination of the primer exchange reaction (PER) with transcription isothermal amplification, termed PER-Trap, for a sensitive biomolecular assay. Its design allowed light-up RNA aptamers to be produced as the final product, leading to the generation of an amplified fluorescence signal. The utility of PER-Trap was successfully demonstrated by the detection of exosomes.
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Affiliation(s)
- Jinseo Son
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea.
| | - Seok Hyeon Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea.
| | - Byung Seok Cha
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea.
| | - Eun Sung Lee
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea.
| | - Seokjoon Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea.
| | - Ki Soo Park
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea.
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Lee ES, Woo J, Shin J, Cha BS, Kim S, Park KS. Tetrahedral DNA nanostructures enhance transcription isothermal amplification for multiplex detection of non-coding RNAs. Biosens Bioelectron 2024; 250:116055. [PMID: 38266617 DOI: 10.1016/j.bios.2024.116055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 01/11/2024] [Accepted: 01/18/2024] [Indexed: 01/26/2024]
Abstract
This study introduces an innovative detection system for multiple cancer biomarkers, employing transcription isothermal amplification methods in conjunction with a tetrahedral DNA nanostructure (TDN). We demonstrate that TDN enhances various transcription isothermal amplification methods by placing DNA probes in proximity. Notably, the TDN-enhanced split T7 promoter-based isothermal transcription amplification with light-up RNA aptamer (STAR) system stands out for its optimal performance and operational simplicity, especially in identifying non-coding RNAs such as microRNAs and long non-coding RNAs (lncRNAs). Multiplex detection of lncRNAs was also achieved by generating distinct light-up RNA aptamers, each emitting unique fluorescence signals. The system effectively identified the target lncRNAs, demonstrating high sensitivity and selectivity in both cell lines and clinical samples. The system, utilizing the single enzyme T7 RNA polymerase, can be easily tailored for alternative targets by substituting target-specific sequences in DNA probes and seamlessly integrated with other isothermal amplification methods for greater sensitivity and accuracy in the detection of multiple cancer biomarkers.
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Affiliation(s)
- Eun Sung Lee
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, 05029, Republic of Korea
| | - Jisu Woo
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, 05029, Republic of Korea
| | - Jiye Shin
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, 05029, Republic of Korea
| | - Byung Seok Cha
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, 05029, Republic of Korea
| | - Seokjoon Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, 05029, Republic of Korea
| | - Ki Soo Park
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, 05029, Republic of Korea.
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3
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Ahn SH, Jang SK, Kim YJ, Kim G, Park KS, Park IC, Jin HO. Amino acid deprivation induces TXNIP expression by NRF2 downregulation. IUBMB Life 2024; 76:212-222. [PMID: 38054509 DOI: 10.1002/iub.2792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 11/06/2023] [Indexed: 12/07/2023]
Abstract
Thioredoxin-interacting protein (TXNIP) is sensitive to oxidative stress and is involved in the pathogenesis of various metabolic, cardiovascular, and neurodegenerative disorders. Therefore, several studies have suggested that TXNIP is a promising therapeutic target for several diseases, particularly cancer and diabetes. However, the regulation of TXNIP expression under amino acid (AA)-restricted conditions is not well understood. In the present study, we demonstrated that TXNIP expression was promoted by the deprivation of AAs, especially arginine, glutamine, lysine, and methionine, in non-small cell lung cancer (NSCLC) cells. Interestingly, we determined that increased TXNIP expression induced by AA deprivation was associated with nuclear factor erythroid 2-related factor 2 (NRF2) downregulation, but not with activating transcription factor 4 (ATF4) activation. Furthermore, N-acetyl-l-cysteine (NAC), a scavenger of reactive oxygen species (ROS), suppressed TXNIP expression in NSCLC cells deprived of AA. Collectively, the induction of TXNIP expression by AA deprivation was mediated by ROS production, potentially through NRF2 downregulation. Our findings suggest that TXNIP expression may be associated with the redox homeostasis of AA metabolism and provide a possible rationale for a therapeutic strategy to treat cancer with AA restriction.
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Affiliation(s)
- Se Hee Ahn
- Division of Fusion Radiology Research, Korea Institute of Radiological & Medical Sciences, Seoul, Republic of Korea
- Department of Biological Engineering, Konkuk University, Seoul, Republic of Korea
| | - Se-Kyeong Jang
- Division of Fusion Radiology Research, Korea Institute of Radiological & Medical Sciences, Seoul, Republic of Korea
| | - Yu Jin Kim
- Division of Fusion Radiology Research, Korea Institute of Radiological & Medical Sciences, Seoul, Republic of Korea
- Department of Biological Engineering, Konkuk University, Seoul, Republic of Korea
| | - Gyeongmi Kim
- Division of Fusion Radiology Research, Korea Institute of Radiological & Medical Sciences, Seoul, Republic of Korea
| | - Ki Soo Park
- Department of Biological Engineering, Konkuk University, Seoul, Republic of Korea
| | - In-Chul Park
- Division of Fusion Radiology Research, Korea Institute of Radiological & Medical Sciences, Seoul, Republic of Korea
| | - Hyeon-Ok Jin
- KIRAMS Radiation Biobank, Korea Institute of Radiological & Medical Sciences, Seoul, Republic of Korea
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Kim Y, Nam D, Lee ES, Kim S, Cha BS, Park KS. Aptamer-Based Switching System for Communication of Non-Interacting Proteins. Biosensors (Basel) 2024; 14:47. [PMID: 38248424 PMCID: PMC10812979 DOI: 10.3390/bios14010047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 01/09/2024] [Accepted: 01/10/2024] [Indexed: 01/23/2024]
Abstract
Biological macromolecules, such as DNA, RNA, and proteins in living organisms, form an intricate network that plays a key role in many biological processes. Many attempts have been made to build new networks by connecting non-communicable proteins with network mediators, especially using antibodies. In this study, we devised an aptamer-based switching system that enables communication between non-interacting proteins. As a proof of concept, two proteins, Cas13a and T7 RNA polymerase (T7 RNAP), were rationally connected using an aptamer that specifically binds to T7 RNAP. The proposed switching system can be modulated in both signal-on and signal-off manners and its responsiveness to the target activator can be controlled by adjusting the reaction time. This study paves the way for the expansion of biological networks by mediating interactions between proteins using aptamers.
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Affiliation(s)
| | | | | | | | | | - Ki Soo Park
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea; (Y.K.); (D.N.); (E.S.L.); (S.K.); (B.S.C.)
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5
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Adhikari G, Carlin N, Choi JJ, Choi S, Ezeribe AC, França LE, Ha C, Hahn IS, Hollick SJ, Jeon EJ, Jo JH, Joo HW, Kang WG, Kauer M, Kim BH, Kim HJ, Kim J, Kim KW, Kim SH, Kim SK, Kim WK, Kim YD, Kim YH, Ko YJ, Lee DH, Lee EK, Lee H, Lee HS, Lee HY, Lee IS, Lee J, Lee JY, Lee MH, Lee SH, Lee SM, Lee YJ, Leonard DS, Luan NT, Manzato BB, Maruyama RH, Neal RJ, Nikkel JA, Olsen SL, Park BJ, Park HK, Park HS, Park KS, Park SD, Pitta RLC, Prihtiadi H, Ra SJ, Rott C, Shin KA, Cavalcante DFFS, Scarff A, Spooner NJC, Thompson WG, Yang L, Yu GH. Search for Boosted Dark Matter in COSINE-100. Phys Rev Lett 2023; 131:201802. [PMID: 38039466 DOI: 10.1103/physrevlett.131.201802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 10/30/2023] [Indexed: 12/03/2023]
Abstract
We search for energetic electron recoil signals induced by boosted dark matter (BDM) from the galactic center using the COSINE-100 array of NaI(Tl) crystal detectors at the Yangyang Underground Laboratory. The signal would be an excess of events with energies above 4 MeV over the well-understood background. Because no excess of events are observed in a 97.7 kg·yr exposure, we set limits on BDM interactions under a variety of hypotheses. Notably, we explored the dark photon parameter space, leading to competitive limits compared to direct dark photon search experiments, particularly for dark photon masses below 4 MeV and considering the invisible decay mode. Furthermore, by comparing our results with a previous BDM search conducted by the Super-Kamionkande experiment, we found that the COSINE-100 detector has advantages in searching for low-mass dark matter. This analysis demonstrates the potential of the COSINE-100 detector to search for MeV electron recoil signals produced by the dark sector particle interactions.
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Affiliation(s)
- G Adhikari
- Department of Physics and Wright Laboratory, Yale University, New Haven, Connecticut 06520, USA
| | - N Carlin
- Physics Institute, University of São Paulo, 05508-090, São Paulo, Brazil
| | - J J Choi
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
- Center for Underground Physics, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
| | - S Choi
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
| | - A C Ezeribe
- Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, United Kingdom
| | - L E França
- Physics Institute, University of São Paulo, 05508-090, São Paulo, Brazil
| | - C Ha
- Department of Physics, Chung-Ang University, Seoul 06973, Republic of Korea
| | - I S Hahn
- Department of Science Education, Ewha Womans University, Seoul 03760, Republic of Korea
- Center for Exotic Nuclear Studies, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
- IBS School, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - S J Hollick
- Department of Physics and Wright Laboratory, Yale University, New Haven, Connecticut 06520, USA
| | - E J Jeon
- Center for Underground Physics, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
| | - J H Jo
- Department of Physics and Wright Laboratory, Yale University, New Haven, Connecticut 06520, USA
| | - H W Joo
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
| | - W G Kang
- Center for Underground Physics, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
| | - M Kauer
- Department of Physics and Wisconsin IceCube Particle Astrophysics Center, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | - B H Kim
- Center for Underground Physics, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
| | - H J Kim
- Department of Physics, Kyungpook National University, Daegu 41566, Republic of Korea
| | - J Kim
- Department of Physics, Chung-Ang University, Seoul 06973, Republic of Korea
| | - K W Kim
- Center for Underground Physics, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
| | - S H Kim
- Center for Underground Physics, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
| | - S K Kim
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
| | - W K Kim
- Center for Underground Physics, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
- IBS School, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Y D Kim
- Center for Underground Physics, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
- IBS School, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
- Department of Physics, Sejong University, Seoul 05006, Republic of Korea
| | - Y H Kim
- Center for Underground Physics, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
- IBS School, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
- Korea Research Institute of Standards and Science, Daejeon 34113, Republic of Korea
| | - Y J Ko
- Center for Underground Physics, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
| | - D H Lee
- Department of Physics, Kyungpook National University, Daegu 41566, Republic of Korea
| | - E K Lee
- Center for Underground Physics, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
| | - H Lee
- Center for Underground Physics, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
- IBS School, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - H S Lee
- Center for Underground Physics, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
- IBS School, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - H Y Lee
- Center for Underground Physics, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
| | - I S Lee
- Center for Underground Physics, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
| | - J Lee
- Center for Underground Physics, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
| | - J Y Lee
- Department of Physics, Kyungpook National University, Daegu 41566, Republic of Korea
| | - M H Lee
- Center for Underground Physics, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
- IBS School, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - S H Lee
- Center for Underground Physics, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
- IBS School, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - S M Lee
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
| | - Y J Lee
- Department of Physics, Chung-Ang University, Seoul 06973, Republic of Korea
| | - D S Leonard
- Center for Underground Physics, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
| | - N T Luan
- Department of Physics, Kyungpook National University, Daegu 41566, Republic of Korea
| | - B B Manzato
- Physics Institute, University of São Paulo, 05508-090, São Paulo, Brazil
| | - R H Maruyama
- Department of Physics and Wright Laboratory, Yale University, New Haven, Connecticut 06520, USA
| | - R J Neal
- Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, United Kingdom
| | - J A Nikkel
- Department of Physics and Wright Laboratory, Yale University, New Haven, Connecticut 06520, USA
| | - S L Olsen
- Center for Underground Physics, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
| | - B J Park
- Center for Underground Physics, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
- IBS School, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - H K Park
- Department of Accelerator Science, Korea University, Sejong 30019, Republic of Korea
| | - H S Park
- Korea Research Institute of Standards and Science, Daejeon 34113, Republic of Korea
| | - K S Park
- Center for Underground Physics, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
| | - S D Park
- Department of Physics, Kyungpook National University, Daegu 41566, Republic of Korea
| | - R L C Pitta
- Physics Institute, University of São Paulo, 05508-090, São Paulo, Brazil
| | - H Prihtiadi
- Center for Underground Physics, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
| | - S J Ra
- Center for Underground Physics, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
| | - C Rott
- Department of Physics, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112, USA
| | - K A Shin
- Center for Underground Physics, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
| | - D F F S Cavalcante
- Physics Institute, University of São Paulo, 05508-090, São Paulo, Brazil
| | - A Scarff
- Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, United Kingdom
| | - N J C Spooner
- Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, United Kingdom
| | - W G Thompson
- Department of Physics and Wright Laboratory, Yale University, New Haven, Connecticut 06520, USA
| | - L Yang
- Department of Physics, University of California San Diego, La Jolla, California 92093, USA
| | - G H Yu
- Center for Underground Physics, Institute for Basic Science (IBS), Daejeon 34126, Republic of Korea
- Department of Physics, Sungkyunkwan University, Suwon 16419, Republic of Korea
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Cha BS, Jang YJ, Lee ES, Kim DY, Woo JS, Son J, Kim S, Shin J, Han J, Kim S, Park KS. Development of a Novel DNA Aptamer Targeting Colorectal Cancer Cell-Derived Small Extracellular Vesicles as a Potential Diagnostic and Therapeutic Agent. Adv Healthc Mater 2023; 12:e2300854. [PMID: 37129521 DOI: 10.1002/adhm.202300854] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 04/20/2023] [Indexed: 05/03/2023]
Abstract
Colorectal cancer (CRC) as the second leading cause of global cancer deaths poses critical challenges in clinical settings. Cancer-derived small extracellular vesicles (sEVs), which are secreted by cancer cells, have been shown to mediate tumor development, invasion, and even metastasis, and have thus received increasing attention for the development of cancer diagnostic or therapeutic platforms. In the present study, the sEV-targeted systematic evolution of ligands by exponential enrichment (E-SELEX) is developed to generate a high-quality aptamer (CCE-10F) that recognizes and binds to CRC-derived sEVs. Via an in-depth investigation, it is confirmed that this novel aptamer possesses high affinity (Kd = 3.41 nm) for CRC-derived sEVs and exhibits a wide linear range (2.0 × 104 -1.0 × 106 particles µL-1 ) with a limit of detection (LOD) of 1.0 × 103 particles µL-1 . Furthermore, the aptamer discriminates CRC cell-derived sEVs from those derived from normal colon cell, human serum, and other cancer cells, showing high specificity for CRC cell-derived sEVs and significantly suppresses the critical processes of metastasis, including cellular migration, invasion, and angiogenesis, which are originally induced by sEVs themselves. These findings are highly encouraging for the potential use of the aptamer in sEV-based diagnostic and therapeutic applications.
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Affiliation(s)
- Byung Seok Cha
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, 05029, Republic of Korea
| | - Young Jun Jang
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, 05029, Republic of Korea
| | - Eun Sung Lee
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, 05029, Republic of Korea
| | - Do Yeon Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, 05029, Republic of Korea
| | - Ji Su Woo
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, 05029, Republic of Korea
| | - Jinseo Son
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, 05029, Republic of Korea
| | - Seokjoon Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, 05029, Republic of Korea
| | - Jiye Shin
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, 05029, Republic of Korea
| | - Jinjoo Han
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, 05029, Republic of Korea
| | - Seokhwan Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, 05029, Republic of Korea
| | - Ki Soo Park
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, 05029, Republic of Korea
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Choi JE, Bae MJ, Kim MJ, Oh SS, Park KS, Lee CJ, Park S, Koh SB, Cho J, Kim C. Heavy metal exposure linked to metabolic syndrome in Korean male firefighters: FRESH cohort cross-sectional analysis. Sci Rep 2023; 13:14016. [PMID: 37640773 PMCID: PMC10462650 DOI: 10.1038/s41598-023-41158-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Accepted: 08/22/2023] [Indexed: 08/31/2023] Open
Abstract
This study aimed to identify the relationship between blood lead and Cadmium (Cd) concentrations and metabolic syndromes (MetS), including its components (central obesity, hypertriglyceridemia, low high-density lioioritein, hypertension, and hyperglycemia) among Korean firefighters. A total of 965 firefighters of the Enhancement of Safety and Health cohort were analyzed in this study. MetS was defined according to the 2005 revised National Cholesterol Education Program-Adult Treatment Panel III criteria and the Korean Society for the Study of Obesity criteria for waist circumference. The collected data were analyzed using a logistic regression model. Of the 965 participants, 190 (19.7%) had MetS. After adjusting for age, body mass index, smoking, drinking, exercise, shift duty, and main duty position, the Cd level was significantly associated with an increased risk of MetS in the Korean firefighter population (odds ratio [OR] = 1.62, 95% confidence interval [CI] 1.07, 2.46). This association was significant among non-smokers and ex-smokers (OR = 1.58, 95% CI 1.03, 2.43), non-drinkers and ex-drinkers (OR = 1.77, 95% CI 1.06, 2.94), firefighters aged 40 year or older (OR = 1.77, 95% CI 1.10, 2.86), and office administrators (OR = 3.85, 95% CI 1.42, 10.39). This outcome suggests that exposure to Cd is likely to increase risk of MetS among firefighters.
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Affiliation(s)
- Jee Eun Choi
- Department of Public Health, Yonsei University College of Medicine, Seoul, Korea
- Institute of Human Complexity and Systems Science, Yonsei University, Incheon, Korea
- Institute of East West Studies, Yonsei University, Seoul, Korea
| | - Mun-Joo Bae
- Department of Occupational and Environmental Health, Yonsei University Graduate School, Seoul, Korea
| | - Mi-Ji Kim
- Department of Preventive Medicine and Institute of Health Science, Gyeongsang National University College of Medicine, Jinju, Korea
| | - Sung Soo Oh
- Department of Occupational and Environmental Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Ki Soo Park
- Department of Preventive Medicine and Institute of Health Science, Gyeongsang National University College of Medicine, Jinju, Korea
| | - Chan Joo Lee
- Division of Cardiology, Yonsei Cardiovascular Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Sungha Park
- Division of Cardiology, Yonsei Cardiovascular Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Sang-Baek Koh
- Department of Preventive Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea
| | - Jaelim Cho
- Institute of Human Complexity and Systems Science, Yonsei University, Incheon, Korea.
- Department of Preventive Medicine, Yonsei University College of Medicine, 50-1 Yonsei-Ro, Seodaemun-Gu, Seoul, Republic of Korea.
- Institute for Environmental Research, Yonsei University College of Medicine, Seoul, Korea.
- Department of Public Health, Yonsei University Graduate School, Seoul, Korea.
| | - Changsoo Kim
- Institute of Human Complexity and Systems Science, Yonsei University, Incheon, Korea.
- Department of Preventive Medicine, Yonsei University College of Medicine, 50-1 Yonsei-Ro, Seodaemun-Gu, Seoul, Republic of Korea.
- Institute for Environmental Research, Yonsei University College of Medicine, Seoul, Korea.
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8
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Kim YJ, Jang SK, Kim G, Hong SE, Park CS, Seong MK, Kim HA, Kim KS, Kim CH, Park KS, Hong J, Jin HO, Park IC. Nebivolol Sensitizes BT-474 Breast Cancer Cells to FGFR Inhibitors. Anticancer Res 2023; 43:1973-1980. [PMID: 37097659 DOI: 10.21873/anticanres.16357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/07/2023] [Accepted: 03/08/2023] [Indexed: 04/26/2023]
Abstract
BACKGROUND/AIM The fibroblast growth factor receptor (FGFR) signaling pathway is abnormally activated in human cancers, including breast cancer. Therefore, targeting the FGFR signaling pathway is a potent strategy to treat breast cancer. The purpose of this study was to find drugs that could increase sensitivity to FGFR inhibitor effects in BT-474 breast cancer cells, and to investigate the combined effects and underlying mechanisms of these combinations for BT-474 breast cancer cell survival. MATERIALS AND METHODS Cell viability was measured by MTT assay. Protein expression was determined by western blot analysis. mRNA expression was detected by Real-time PCR. Drug synergy effect was determined by isobologram analysis. RESULTS Nebivolol, a third generation β1-blocker, synergistically increased the sensitivity of BT-474 breast cancer cells to the potent and selective FGFR inhibitors erdafitinib (JNJ-42756493) and AZD4547. A combination of nebivolol and erdafitinib markedly reduced AKT activation. Suppression of AKT activation using specific siRNA and a selective inhibitor further enhanced cell sensitivity to combined treatment with nebivolol and erdafitinib, whereas SC79, a potent activator of AKT, reduced cell sensitivity to nebivolol and erdafitinib. CONCLUSION Enhanced sensitivity of BT-474 breast cancer cells to nebivolol and erdafitinib was probably associated with down-regulation of AKT activation. Combined treatment with nebivolol and erdafitinib is a promising strategy for breast cancer treatment.
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Affiliation(s)
- Yu Jin Kim
- Division of Fusion Radiology Research, Korea Institute of Radiological & Medical Sciences, Seoul, Republic of Korea
- Department of Biological Engineering, Konkuk University, Seoul, Republic of Korea
| | - Se-Kyeong Jang
- Division of Fusion Radiology Research, Korea Institute of Radiological & Medical Sciences, Seoul, Republic of Korea
- Department of Food and Microbial Technology, Seoul Women's University, Seoul, Republic of Korea
| | - Gyeongmi Kim
- Division of Fusion Radiology Research, Korea Institute of Radiological & Medical Sciences, Seoul, Republic of Korea
- Department of Cosmetics Engineering, Konkuk University, Seoul, Republic of Korea
| | - Sung-Eun Hong
- KIRAMS Radiation Biobank, Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
| | - Chan Sub Park
- Department of Surgery, Korea Cancer Center Hospital, Korea Institute of Radiological & Medical Sciences, Seoul, Republic of Korea
| | - Min-Ki Seong
- Department of Surgery, Korea Cancer Center Hospital, Korea Institute of Radiological & Medical Sciences, Seoul, Republic of Korea
| | - Hyun-Ah Kim
- Department of Surgery, Korea Cancer Center Hospital, Korea Institute of Radiological & Medical Sciences, Seoul, Republic of Korea
| | - Kwang Seok Kim
- Division of Fusion Radiology Research, Korea Institute of Radiological & Medical Sciences, Seoul, Republic of Korea
| | - Chun-Ho Kim
- Laboratory of Tissue Engineering, Korea Institute of Radiological & Medical Sciences, Seoul, Republic of Korea
| | - Ki Soo Park
- Department of Biological Engineering, Konkuk University, Seoul, Republic of Korea
| | - Jungil Hong
- Department of Food and Microbial Technology, Seoul Women's University, Seoul, Republic of Korea
| | - Hyeon-Ok Jin
- KIRAMS Radiation Biobank, Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
| | - In-Chul Park
- Division of Fusion Radiology Research, Korea Institute of Radiological & Medical Sciences, Seoul, Republic of Korea;
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Han J, Shin J, Lee ES, Cha BS, Kim S, Jang Y, Kim S, Park KS. Cas12a/blocker DNA-based multiplex nucleic acid detection system for diagnosis of high-risk human papillomavirus infection. Biosens Bioelectron 2023; 232:115323. [PMID: 37079992 DOI: 10.1016/j.bios.2023.115323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 03/08/2023] [Accepted: 04/13/2023] [Indexed: 04/22/2023]
Abstract
Clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated (Cas) proteins are an innovative tool in molecular diagnostics owing to their high specificity and modularity for target nucleic acid sequences. However, the sequence-indiscriminate trans-cleavage activity of the Cas protein renders multiplex detection challenging. In this study, we developed a Cas12a-based multiplex detection system by designing blocker DNA complementary to reporter DNA, which enables the simultaneous detection of two genes with a single Cas protein in a single reaction. As a proof of concept, we chose high-risk human papillomavirus (HPV) 16 and 18 as the model targets and incorporated recombinase polymerase amplification (RPA) and transcription reactions to achieve high accuracy and sensitivity. Using the proposed system, we detected the genes of both HPV 16 and 18 down to 1 aM within 80 min under isothermal conditions. We validated the performance of the system in detecting genomic DNA from various cell lines and clinical samples from cervical cancer patients with high specificity. The proposed system facilitated rapid multiplex detection of high-risk HPVs in a single reaction tube with only Cas12a, thus representing a more user-friendly and economical alternative to previous Cas protein-based multiplex detection assays. The proposed system has considerable potential for point-of-care testing and could be expanded to detect various nucleic acid biomarkers.
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Affiliation(s)
- Jinjoo Han
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Jiye Shin
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Eun Sung Lee
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Byung Seok Cha
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Seokjoon Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Youngjun Jang
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Seokhwan Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Ki Soo Park
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea.
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Nam D, Kim S, Kim JH, Lee S, Kim D, Son J, Kim D, Cha BS, Lee ES, Park KS. Low-Temperature Loop-Mediated Isothermal Amplification Operating at Physiological Temperature. Biosensors (Basel) 2023; 13:367. [PMID: 36979579 PMCID: PMC10046060 DOI: 10.3390/bios13030367] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 03/02/2023] [Accepted: 03/06/2023] [Indexed: 06/16/2023]
Abstract
Loop-mediated isothermal amplification (LAMP) is one of the most widely used isothermal amplification technologies in molecular diagnostics. However, LAMP operates at a high temperature of 65 °C; thus, operating LAMP at a lower temperature is desirable to maximize its usefulness for on-site diagnosis. In this study, we propose a new version of LAMP, termed low-temperature LAMP, which operates at the physiological temperature of 37 °C. Low-temperature LAMP differs from conventional LAMP operating at 65 °C in terms of the concentrations of MgSO4 and deoxyribonucleoside triphosphates (dNTPs), as well as the lengths of DNA probes, which are crucial for the execution of low-temperature LAMP. Under the optimal conditions, the amplification efficiency of low-temperature LAMP is comparable to that of conventional LAMP. In addition, the ligation reaction at 37 °C, which is necessary to detect actual target nucleic acids, is combined without altering the temperature, enabling the identification of miR-21, a cancer-promoting oncogenic miRNA, with high sensitivity and selectivity. The method described in this paper does not require expensive DNA modifications or special additives and would facilitate the widespread application of LAMP in facility-limited or point-of-care settings, paving the way to improvements in other isothermal-amplification-based techniques.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Ki Soo Park
- Correspondence: ; Tel.: +82-2-450-3742; Fax: +82-2-450-3742
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11
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Kim M, Lee D, Kim W, Eun Lee J, Lee J, Tae Kim Y, Lee SK, Soo Oh S, Soo Park K, Baek Koh S, Kim C, Jung YC. Associations between altered functional connectivity of attentional networks and sleep quality among firefighters. Neurosci Lett 2022; 791:136924. [DOI: 10.1016/j.neulet.2022.136924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 10/14/2022] [Accepted: 10/17/2022] [Indexed: 10/31/2022]
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12
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Kim DH, Moon SJ, Lee J, Cha JK, Kim MH, Park JS, Ban B, Kang J, Kim BJ, Kim WS, Yoon CH, Lee H, Kim S, Kang EK, Her AY, Yoon CW, Rha JH, Woo SI, Lee WK, Jung HY, Lee JH, Park HS, Hwang YH, Kim K, Kim RB, Choi NC, Hwang J, Park HW, Park KS, Yi S, Cho JY, Kim NH, Choi KH, Kim J, Han JY, Choi JC, Kim SY, Choi JH, Kim J, Sohn MK, Choi SW, Shin DI, Lee SY, Bae JW, Lee KS, Bae HJ. Comparison of Factors Associated With Direct Versus Transferred-in Admission to Government-Designated Regional Centers Between Acute Ischemic Stroke and Myocardial Infarction in Korea. J Korean Med Sci 2022; 37:e305. [PMID: 36325609 PMCID: PMC9623032 DOI: 10.3346/jkms.2022.37.e305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 08/29/2022] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND There has been no comparison of the determinants of admission route between acute ischemic stroke (AIS) and acute myocardial infarction (AMI). We examined whether factors associated with direct versus transferred-in admission to regional cardiocerebrovascular centers (RCVCs) differed between AIS and AMI. METHODS Using a nationwide RCVC registry, we identified consecutive patients presenting with AMI and AIS between July 2016 and December 2018. We explored factors associated with direct admission to RCVCs in patients with AIS and AMI and examined whether those associations differed between AIS and AMI, including interaction terms between each factor and disease type in multivariable models. To explore the influence of emergency medical service (EMS) paramedics on hospital selection, stratified analyses according to use of EMS were also performed. RESULTS Among the 17,897 and 8,927 AIS and AMI patients, 66.6% and 48.2% were directly admitted to RCVCs, respectively. Multivariable analysis showed that previous coronary heart disease, prehospital awareness, higher education level, and EMS use increased the odds of direct admission to RCVCs, but the odds ratio (OR) was different between AIS and AMI (for the first 3 factors, AMI > AIS; for EMS use, AMI < AIS). EMS use was the single most important factor for both AIS and AMI (OR, 4.72 vs. 3.90). Hypertension and hyperlipidemia increased, while living alone decreased the odds of direct admission only in AMI; additionally, age (65-74 years), previous stroke, and presentation during non-working hours increased the odds only in AIS. EMS use weakened the associations between direct admission and most factors in both AIS and AMI. CONCLUSIONS Various patient factors were differentially associated with direct admission to RCVCs between AIS and AMI. Public education for symptom awareness and use of EMS is essential in optimizing the transportation and hospitalization of patients with AMI and AIS.
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Affiliation(s)
- Dae-Hyun Kim
- Busan Regional Cardiocerebrovascular Disease Center, Dong-A University Hospital, Busan, Korea
| | - Seok-Joo Moon
- Department of Biostatistics, Korea University College of Medicine, Seoul, Korea
| | - Juneyoung Lee
- Department of Biostatistics, Korea University College of Medicine, Seoul, Korea
| | - Jae-Kwan Cha
- Busan Regional Cardiocerebrovascular Disease Center, Dong-A University Hospital, Busan, Korea
| | - Moo Hyun Kim
- Busan Regional Cardiocerebrovascular Disease Center, Dong-A University Hospital, Busan, Korea
| | - Jong-Sung Park
- Busan Regional Cardiocerebrovascular Disease Center, Dong-A University Hospital, Busan, Korea
| | - Byeolnim Ban
- Gyeonggi Regional Cardiocerebrovascular Disease Center, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
| | - Jihoon Kang
- Gyeonggi Regional Cardiocerebrovascular Disease Center, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
| | - Beom Joon Kim
- Gyeonggi Regional Cardiocerebrovascular Disease Center, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
| | - Won-Seok Kim
- Gyeonggi Regional Cardiocerebrovascular Disease Center, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
| | - Chang-Hwan Yoon
- Gyeonggi Regional Cardiocerebrovascular Disease Center, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
| | - Heeyoung Lee
- Gyeonggi Regional Cardiocerebrovascular Disease Center, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
| | - Seongheon Kim
- Gangwon Regional Cardiocerebrovascular Disease Center, Kangwon National University Hospital, Kangwon National University School of Medicine, Chuncheon, Korea
| | - Eun Kyoung Kang
- Gangwon Regional Cardiocerebrovascular Disease Center, Kangwon National University Hospital, Kangwon National University School of Medicine, Chuncheon, Korea
| | - Ae-Young Her
- Gangwon Regional Cardiocerebrovascular Disease Center, Kangwon National University Hospital, Kangwon National University School of Medicine, Chuncheon, Korea
| | - Cindy W Yoon
- Incheon Regional Cardiocerebrovascular Disease Center, Inha University College of Medicine, Incheon, Korea
| | - Joung-Ho Rha
- Incheon Regional Cardiocerebrovascular Disease Center, Inha University College of Medicine, Incheon, Korea
| | - Seong-Ill Woo
- Incheon Regional Cardiocerebrovascular Disease Center, Inha University College of Medicine, Incheon, Korea
| | - Won Kyung Lee
- Incheon Regional Cardiocerebrovascular Disease Center, Inha University College of Medicine, Incheon, Korea
| | - Han-Young Jung
- Incheon Regional Cardiocerebrovascular Disease Center, Inha University College of Medicine, Incheon, Korea
| | - Jang Hoon Lee
- Daegu-Gyeongbuk Regional Cardiocerebrovascular Disease Center, Kyungpook National University Hospital, Daegu, Korea
| | - Hun Sik Park
- Daegu-Gyeongbuk Regional Cardiocerebrovascular Disease Center, Kyungpook National University Hospital, Daegu, Korea
| | - Yang-Ha Hwang
- Daegu-Gyeongbuk Regional Cardiocerebrovascular Disease Center, Kyungpook National University Hospital, Daegu, Korea
| | - Keonyeop Kim
- Daegu-Gyeongbuk Regional Cardiocerebrovascular Disease Center, Kyungpook National University Hospital, Daegu, Korea
| | - Rock Bum Kim
- Gyeongnam Regional Cardiocerebrovascular Disease Center, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Nack-Cheon Choi
- Gyeongnam Regional Cardiocerebrovascular Disease Center, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Jinyong Hwang
- Gyeongnam Regional Cardiocerebrovascular Disease Center, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Hyun-Woong Park
- Gyeongnam Regional Cardiocerebrovascular Disease Center, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Ki Soo Park
- Gyeongnam Regional Cardiocerebrovascular Disease Center, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Korea
| | - SangHak Yi
- Jeonbuk Regional Cardiocerebrovascular Center, Wonkwang University Hospital, Iksan, Korea
| | - Jae Young Cho
- Jeonbuk Regional Cardiocerebrovascular Center, Wonkwang University Hospital, Iksan, Korea
| | - Nam-Ho Kim
- Jeonbuk Regional Cardiocerebrovascular Center, Wonkwang University Hospital, Iksan, Korea
| | - Kang-Ho Choi
- Gwangju-Jeonnam Regional Cardiocerebrovascular Disease Center, Chonnam National University Medical School and Hospital, Gwangju, Korea
| | - Juhan Kim
- Gwangju-Jeonnam Regional Cardiocerebrovascular Disease Center, Chonnam National University Medical School and Hospital, Gwangju, Korea
| | - Jae-Young Han
- Gwangju-Jeonnam Regional Cardiocerebrovascular Disease Center, Chonnam National University Medical School and Hospital, Gwangju, Korea
| | - Jay Chol Choi
- Jeju Regional Cardiocerebrovascular Disease Center, Jeju National University Hospital, Jeju, Korea
| | - Song-Yi Kim
- Jeju Regional Cardiocerebrovascular Disease Center, Jeju National University Hospital, Jeju, Korea
| | - Joon-Hyouk Choi
- Jeju Regional Cardiocerebrovascular Disease Center, Jeju National University Hospital, Jeju, Korea
| | - Jei Kim
- Daejeon-Chungnam Regional Cardiocerebrovascular Disease Center, Hospital and College of Medicine, Chungnam National University, Daejeon, Korea
| | - Min Kyun Sohn
- Daejeon-Chungnam Regional Cardiocerebrovascular Disease Center, Hospital and College of Medicine, Chungnam National University, Daejeon, Korea
| | - Si Wan Choi
- Daejeon-Chungnam Regional Cardiocerebrovascular Disease Center, Hospital and College of Medicine, Chungnam National University, Daejeon, Korea
| | - Dong-Ick Shin
- Chungbuk Regional Cardiocerebrovascular Disease Center, Chungbuk National University and Hospital, Cheongju, Korea
| | - Sang Yeub Lee
- Chungbuk Regional Cardiocerebrovascular Disease Center, Chungbuk National University and Hospital, Cheongju, Korea
| | - Jang-Whan Bae
- Chungbuk Regional Cardiocerebrovascular Disease Center, Chungbuk National University and Hospital, Cheongju, Korea
| | - Kun Sei Lee
- Department of Preventive Medicine, School of Medicine, Konkuk University, Seoul, Korea
| | - Hee-Joon Bae
- Gyeonggi Regional Cardiocerebrovascular Disease Center, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
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Chowdhury P, Kim S, Lee ES, Cha BS, Park KS. DNA micelle-templated copper nanoclusters for fluorescent imaging of MUC1-positive cancer cells. Mikrochim Acta 2022; 189:404. [PMID: 36197534 DOI: 10.1007/s00604-022-05502-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 09/17/2022] [Indexed: 11/28/2022]
Abstract
DNA micelles formed by hydrophobic, self-assembly of amphiphilic DNA monomers have enormous potential in biological imaging owing to its unique and programmable, three-dimensional nanostructure. Herein, we rationally design double-stranded DNA oligonucleotides with two cholesterols that can spontaneously form the lipid-mediated DNA micelles and generate the high fluorescence signal after the formation of DNA-templated copper nanoclusters (CuNCs). Furthermore, the DNA aptamer specific to MUC1 protein, aberrantly overexpressed on the surface of cancer cells, is attached to lipid-mediated DNA micelles to confer the selectivity towards the target cancer cells. With the well-defined DNA nanostructures, the cell membrane of MUC1-positive cancer cells are stained by CuNCs exhibiting an intense, red fluorescence signal, which are clearly distinguished from MUC1-negative cancer cells. This approach may not only expand the application scope of both DNA micells and CuNCs, especially in the area of cellular imaging, but also provides a basis for developing other types of DNA nanostructures to detect target biomarkers.
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Affiliation(s)
- Pinky Chowdhury
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Seokjoon Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Eun Sung Lee
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Byung Seok Cha
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Ki Soo Park
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea.
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Han J, Park JS, Kim S, Cha BS, Lee ES, Kim JH, Kim S, Shin J, Jang Y, Chowdhury P, Park KS. Modulation of CRISPR/Cas12a trans-cleavage activity by various DNA-modifying enzymes. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107606] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Kim S, Lee ES, Cha BS, Park KS. High Fructose Concentration Increases the Fluorescence Stability of DNA-Templated Copper Nanoclusters by Several Thousand Times. Nano Lett 2022; 22:6121-6127. [PMID: 35895973 DOI: 10.1021/acs.nanolett.2c01287] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
DNA-templated copper nanoclusters (CuNCs) have limited applications because of their low fluorescence stability (several tens of minutes). In this study, we prepared CuNCs with improved temporal fluorescence stability by introducing fructose into the CuNC synthesis process and optimizing the reaction conditions. The inclusion of fructose increased the operating lifetime of CuNCs by approximately 5200-fold from 30 min to 108 days and improved their stability against heat, acids, and bases compared to CuNCs synthesized under original conditions. In addition, the fluorescence signal of CuNCs was maintained for a significantly longer time when stored at refrigeration (4 °C) and freezing (-20 °C) temperatures. Importantly, this method did not require the addition of substances other than fructose or any additional physicochemical treatment to maintain the fluorescence of DNA-templated CuNCs for more than several tens of days. As such, this study could serve as a basis to improve the stability of CuNCs for various applications.
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Affiliation(s)
- Seokjoon Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Eun Sung Lee
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Byung Seok Cha
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Ki Soo Park
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
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Kim YJ, Hong SE, Jang SK, Park KS, Kim CH, Park IC, Jin HO. Knockdown of NUPR1 Enhances the Sensitivity of Non-small-cell Lung Cancer Cells to Metformin by AKT Inhibition. Anticancer Res 2022; 42:3475-3481. [PMID: 35790270 DOI: 10.21873/anticanres.15834] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 06/07/2022] [Accepted: 06/08/2022] [Indexed: 11/10/2022]
Abstract
BACKGROUND/AIM Metformin is a widely used drug for type 2 diabetes mellitus and has recently attracted broad attention for its therapeutic effects on many cancers. This study aimed to investigate the molecular mechanism of metformin's anticancer activity. MATERIALS AND METHODS Cell viability was measured by MTT assay. Gene and protein expression levels were determined by reverse transcription-polymerase chain reaction and western blot analyses, respectively. RESULTS Metformin and phenformin markedly induced NUPR1 expression in a dose- and time-dependent manner in H1299 non-small-cell lung cancer (NSCLC) cells. The silencing of NUPR1 in H1299 NSCLC cells enhanced cell sensitivity to metformin or ionizing radiation. Our previous report showed that metformin induces AKT serine/threonine kinase (AKT) activation in an activating transcription factor 4 (ATF4)-dependent manner and that the inhibition of AKT promotes cell sensitivity to metformin in H1299 NSCLC cells. Interestingly, ATF4-induced AKT activation in H1299 NSCLC cells treated with metformin was suppressed by the knockdown of NUPR1. CONCLUSION Targeting NUPR1 could enhance the sensitivity of H1299 NSCLC cells to metformin by AKT inhibition.
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Affiliation(s)
- Yu Jin Kim
- Division of Fusion Radiology Research, Korea Institute of Radiological & Medical Sciences, Seoul, Republic of Korea.,Department of Biological Engineering, Konkuk University, Seoul, Republic of Korea
| | - Sung-Eun Hong
- KIRAMS Radiation Biobank, Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
| | - Se-Kyeong Jang
- Division of Fusion Radiology Research, Korea Institute of Radiological & Medical Sciences, Seoul, Republic of Korea
| | - Ki Soo Park
- Department of Biological Engineering, Konkuk University, Seoul, Republic of Korea
| | - Chun-Ho Kim
- Laboratory of Tissue Engineering, Korea Institute of Radiological & Medical Sciences, Seoul, Republic of Korea
| | - In-Chul Park
- Division of Fusion Radiology Research, Korea Institute of Radiological & Medical Sciences, Seoul, Republic of Korea;
| | - Hyeon-Ok Jin
- KIRAMS Radiation Biobank, Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea;
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Abstract
As DNA polymerases are even active at ambient temperature, there is inevitable non-specific amplification; to avoid the undesired amplification of analytes, a heat activation-based polymerase chain reaction (PCR), called hot-start PCR, is widely used to be highly precise and quantitative in detection. Unlike thermocycling amplification, isothermal amplification, compatible for point-of-care (PoC) tests, cannot be benefited by the heat-activation technique, making the method qualitative rather than quantitative. In this work, we newly developed a lead ion (Pb2+) activation technique, called lead-start isothermal amplification, allowing on-demand activation or deactivation of DNA polymerases at room temperature. We systematically correlated the DNA polymerase inhibition by the TQ30 aptamer with Pb2+-responsive strand cleavage by the GR5 DNAzyme, and relying on the type of interconnectors, Pb2+ successfully served as an initiator or a terminator of isothermal DNA amplification. Our lead-start isothermal amplification was exceptionally Pb2+-specific, dramatically increasing the enzymatic activity of DNA polymerase (>25 times) only by Pb2+ introduction. Despite one-by-one sample preparation, a number of reactions can begin and end at the same time, sharing the identical amplification conditions, and thereby allowing their quantitative analysis and comparison. Using a portable UV lamp and a smartphone camera, we also succeeded in quantifying the amounts of clinically important and human papillomavirus type 16 genes in human serum and SARS-CoV-2's nucleocapsid genes in human serum and saliva, and the limit of detection was as low as 0.1 nM, highly applicable for actual PoC tests in the field with no purification process.
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Affiliation(s)
- Hyebin Yoo
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea.
| | - Ju Young Lee
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan, 44429, South Korea
| | - Ki Soo Park
- Department of Biological Engineering, Konkuk University, Seoul, 05029, South Korea.
| | - Seung Soo Oh
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, South Korea.
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Yoon CW, Oh H, Lee J, Rha J, Woo S, Lee WK, Jung H, Ban B, Kang J, Kim BJ, Kim W, Yoon C, Lee H, Kim S, Kim SH, Kang EK, Her A, Cha J, Kim D, Kim M, Lee JH, Park HS, Kim K, Kim RB, Choi N, Hwang J, Park H, Park KS, Yi S, Cho JY, Kim N, Choi K, Kim Y, Kim J, Han J, Choi JC, Kim S, Choi J, Kim J, Jee SJ, Sohn MK, Choi SW, Shin D, Lee SY, Bae J, Lee K, Bae H. Comparisons of Prehospital Delay and Related Factors Between Acute Ischemic Stroke and Acute Myocardial Infarction. J Am Heart Assoc 2022; 11:e023214. [PMID: 35491981 PMCID: PMC9238627 DOI: 10.1161/jaha.121.023214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background
Prehospital delay is an important contributor to poor outcomes in both acute ischemic stroke (AIS) and acute myocardial infarction (AMI). We aimed to compare the prehospital delay and related factors between AIS and AMI.
Methods and Results
We identified patients with AIS and AMI who were admitted to the 11 Korean Regional Cardiocerebrovascular Centers via the emergency room between July 2016 and December 2018. Delayed arrival was defined as a prehospital delay of >3 hours, and the generalized linear mixed‐effects model was applied to explore the effects of potential predictors on delayed arrival. This study included 17 895 and 8322 patients with AIS and AMI, respectively. The median value of prehospital delay was 6.05 hours in AIS and 3.00 hours in AMI. The use of emergency medical services was the key determinant of delayed arrival in both groups. Previous history, 1‐person household, weekday presentation, and interhospital transfer had higher odds of delayed arrival in both groups. Age and sex had no or minimal effects on delayed arrival in AIS; however, age and female sex were associated with higher odds of delayed arrival in AMI. More severe symptoms had lower odds of delayed arrival in AIS, whereas no significant effect was observed in AMI. Off‐hour presentation had higher and prehospital awareness had lower odds of delayed arrival; however, the magnitude of their effects differed quantitatively between AIS and AMI.
Conclusions
The effects of some nonmodifiable and modifiable factors on prehospital delay differed between AIS and AMI. A differentiated strategy might be required to reduce prehospital delay.
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Kim S, Kim JH, Kim S, Park JS, Cha BS, Lee ES, Han J, Shin J, Jang Y, Park KS. Loop-mediated isothermal amplification-based nucleic acid lateral flow assay for the specific and multiplex detection of genetic markers. Anal Chim Acta 2022; 1205:339781. [DOI: 10.1016/j.aca.2022.339781] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 03/01/2022] [Accepted: 03/26/2022] [Indexed: 12/20/2022]
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Kim S, Han J, Park JS, Kim JH, Lee ES, Cha BS, Park KS. DNA barcode-based detection of exosomal microRNAs using nucleic acid lateral flow assays for the diagnosis of colorectal cancer. Talanta 2022; 242:123306. [DOI: 10.1016/j.talanta.2022.123306] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 02/07/2022] [Accepted: 02/10/2022] [Indexed: 12/23/2022]
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Kim YT, Kim W, Bae MJ, Choi JE, Kim MJ, Oh SS, Park KS, Park S, Lee SK, Koh SB, Kim C. The effect of polycyclic aromatic hydrocarbons on changes in the brain structure of firefighters: An analysis using data from the Firefighters Research on Enhancement of Safety & Health study. Sci Total Environ 2022; 816:151655. [PMID: 34785224 DOI: 10.1016/j.scitotenv.2021.151655] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 10/17/2021] [Accepted: 11/09/2021] [Indexed: 06/13/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are formed during incomplete combustion of organic matter, and firefighters are highly exposed to these toxic compounds at fire sites. Exposure to PAHs can cause cognitive decline and neurodegeneration; however, to date, few studies have examined the potential effects of PAH exposure on structural changes in the brain. We aimed to investigate the association between the four types of PAH metabolites and the corresponding changes in neuroimaging markers based on smoking status and hypertension in male firefighters. For this, we utilized the 2-year follow-up data of 301 Korean male firefighters aged over 40 years. The concentrations of four PAH metabolites in urine were measured. Subcortical volume and cortical thickness were estimated using 3 T magnetic resonance imaging of the brain. A generalized linear model was used to investigate the effects of PAHs on changes in the subcortical volume and cortical thickness. We found an association between 1-hydroxyphenathrene (1-OHPHE) and 2-hydroxyfluorene (2-OHF) and changes in several brain regions in all the study participants. Individuals who had never smoked showed significantly thinner frontal (p < 0.001), parietal (p < 0.001), temporal (p < 0.001), and cingulate lobes (p < 0.001) with 1% increase each in the urinary concentration of 1-OHPHE. Hypertension interacted with the concentration of 1-OHPHE to reduce the volume of gray matter and cause cortical thinning in the frontal, parietal, and temporal lobes. Exposure to PAHs may reduce cortical thickness and subcortical volume, which are definitive markers of neurodegeneration. Notably, hypertension can accelerate the degenerative effects of PAHs.
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Affiliation(s)
- Yun Tae Kim
- Department of Public Health, Yonsei University, Seoul, Republic of Korea
| | - Woojin Kim
- Department of Preventive Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Mun-Joo Bae
- Department of Occupational and Environmental Health, Yonsei University Graduate School of Public Health, Seoul, Republic of Korea
| | - Jee Eun Choi
- Department of Public Health, Yonsei University, Seoul, Republic of Korea
| | - Mi-Ji Kim
- Department of Preventive Medicine and Institute of Health Science, Gyeongsang National University College of Medicine, Jinju, Republic of Korea
| | - Sung Soo Oh
- Department of Occupational and Environmental Medicine, Wonju College of Medicine, Yonsei University, Wonju, Republic of Korea
| | - Ki Soo Park
- Department of Preventive Medicine and Institute of Health Science, Gyeongsang National University College of Medicine, Jinju, Republic of Korea
| | - Sungha Park
- Division of Cardiology, Yonsei Cardiovascular Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Seung-Koo Lee
- Department of Radiology, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Sang-Baek Koh
- Department of Preventive Medicine, Wonju College of Medicine, Yonsei University, Wonju, Republic of Korea
| | - Changsoo Kim
- Department of Preventive Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea; Institute of Human Complexity and Systems Science, Yonsei University, Incheon, Republic of Korea.
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22
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Yoon T, Shin J, Choi HJ, Park KS. Split T7 promoter-based isothermal transcription amplification for one-step fluorescence detection of SARS-CoV-2 and emerging variants. Biosens Bioelectron 2022; 208:114221. [PMID: 35421842 PMCID: PMC8968188 DOI: 10.1016/j.bios.2022.114221] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 03/18/2022] [Accepted: 03/24/2022] [Indexed: 12/12/2022]
Abstract
The negative global impact of the coronavirus disease pandemic has highlighted the crucial need for a rapid and convenient method of viral RNA detection. In this study, we report a novel method, termed as the split T7 promoter-based isothermal transcription amplification with light-up RNA aptamer (STAR), for one-pot detection of viral RNA. STAR uses a split T7 promoter that is applied to a three-way junction to mediate the selective transcription by the T7 RNA polymerase in the presence of target RNA. In addition, a light-up RNA aptamer is used for signal amplification. STAR can detect viral RNA in less than 30 min with high specificity and sensitivity. By testing of 60 nasopharyngeal SARS-CoV-2 samples, the STAR assay demonstrates an excellent sensitivity and specificity of 96.7% and 100%, respectively. Moreover, we provide experimental evidence of the broad applicability of this assay through the multiplex detection of SARS-CoV-2 variants (D614G mutation) and direct detection of bacterial 16S rRNA.
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Affiliation(s)
- Taehwi Yoon
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Jiye Shin
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Hyun-Jung Choi
- Department of Laboratory Medicine, Chonnam National University Medical School and Chonnam National University Hospital, Gwangju, Republic of Korea.
| | - Ki Soo Park
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea.
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23
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Chowdhury P, Cha BS, Kim S, Lee ES, Yoon T, Woo J, Park KS. T7 Endonuclease I-mediated voltammetric detection of KRAS mutation coupled with horseradish peroxidase for signal amplification. Mikrochim Acta 2022; 189:75. [PMID: 35083578 DOI: 10.1007/s00604-021-05089-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 11/01/2021] [Indexed: 02/01/2023]
Abstract
Rapid and selective sensing of KRAS gene mutation which plays a crucial role in the development of colorectal, pancreatic, and lung cancers is of great significance in the early diagnosis of cancers. In the current study, we developed a simple electrochemical biosensor by differential pulse voltammetry technique for the specific detection of KRAS mutation that uses the mismatch-specific cleavage activity of T7-Endonuclease I (T7EI) coupled with horseradish peroxidase (HRP) to catalyze the oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) substrate in the presence of hydrogen peroxide (H2O2). In addition, we synthesized the nanocomposite composed of multi-walled carbon nanotube/chitosan-ionic liquid/gold nanoparticles (MWCNT/Chit-IL/AuNPs) on screen-printed carbon electrode surface to increase the electrode surface area and electrochemical signal. In principle, T7E1 enzyme recognized and cleaved the mismatched site formed by the presence of KRAS gene mutation, removing 5'-biotin of capture probes and subsequently reducing the differential pulse voltammetry signal compared to wild-type KRAS gene. With this proposed strategy, a limit of detection of 11.89 fM was achieved with a broad linear relationship from 100 fM to 1 µM and discriminated 0.1% of mutant genes from the wild-type target genes. This confirms that the developed biosensor is a potential platform for the detection of mutations in early disease diagnosis.
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Affiliation(s)
- Pinky Chowdhury
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Byung Seok Cha
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Seokjoon Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Eun Sung Lee
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Taehwi Yoon
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Jisu Woo
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Ki Soo Park
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea.
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Park JS, Kim S, Han J, Kim JH, Park KS. Equipment-free, salt-mediated immobilization of nucleic acids for nucleic acid lateral flow assays. Sens Actuators B Chem 2022; 351:130975. [PMID: 36568876 PMCID: PMC9758654 DOI: 10.1016/j.snb.2021.130975] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 10/13/2021] [Accepted: 10/19/2021] [Indexed: 06/16/2023]
Abstract
As the world has been facing several deadly virus crises, including Zika virus disease, Ebola virus disease, severe acute respiratory syndrome (SARS), Middle East respiratory syndrome (MERS), and Coronavirus disease 2019 (COVID-19), lateral flow assays (LFAs), which require minimal equipment for point-of-care of viral infectious diseases, are garnering much attention. Accordingly, there is an increasing demand to reduce the time and cost required for manufacturing LFAs. The current study introduces an equipment-free method of salt-mediated immobilization of nucleic acids (SAIoNs) for LFAs. Compared to general DNA immobilization methods such as streptavidin-biotin, UV-irradiation, and heat treatment, our method does not require special equipment (e.g., centrifuge, UV-crosslinker, heating device); therefore, it can be applied in a resource-limited environment with reduced production costs. The immobilization process was streamlined and completed within 30 min. Our method improved the color intensity signal approximately 14 times compared to the method without using SAIoNs and exhibited reproducibility with the long-term storage stability. The proposed method can be used to detect practical targets (e.g., SARS-CoV-2) and facilitates highly sensitive and selective detection of target nucleic acids with multiplexing capability and without any cross-reactivity. This novel immobilization strategy provides a basis for easily and inexpensively developing nucleic acid LFAs combined with various types of nucleic acid amplification.
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Key Words
- AuNPs, gold nanoparticles
- BSA, bovine serum albumin
- Biotin
- Equipment-free
- Immobilization
- LAMP, loop-mediated isothermal amplification
- LF, lateral flow
- LFA, lateral flow assay
- LFIA, lateral flow immuno-assay
- LOD, limit of detection
- Lateral flow assay
- MERS, Middle East respiratory syndrome
- Metal salt
- NALFA, nucleic acid lateral flow assay
- NC, nitrocellulose
- NTC, no-template control
- Nucleic acid lateral flow assay
- POC, point-of-care
- RPA, recombinase polymerase amplification
- RT-qPCR, quantitative reverse transcription-polymerase chain reaction
- SAIoNs, salt-mediated immobilization of nucleic acids
- SARS, severe acute respiratory syndrome
- Streptavidin
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Affiliation(s)
- Jung Soo Park
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Seokjoon Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Jinjoo Han
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Jung Ho Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Ki Soo Park
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
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25
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Lee S, Nam D, Park JS, Kim S, Lee ES, Cha BS, Park KS. Highly Efficient DNA Reporter for CRISPR/Cas12a-Based Specific and Sensitive Biosensor. Biochip J 2022; 16:463-470. [PMID: 36117747 PMCID: PMC9468524 DOI: 10.1007/s13206-022-00081-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 08/16/2022] [Accepted: 08/26/2022] [Indexed: 12/29/2022]
Abstract
In addition to cis-cleavage activity that recognizes and cleaves nucleic acid sequences, a trans-cleavage activity that indiscriminately and non-specifically cleaves single-stranded DNA or RNA has been discovered in some Cas proteins, including Cas12a and Cas13a. Various detection methods using this activity have been widely reported. Herein, we describe a new highly efficient DNA reporter (5'-TTATT-CCCCC-3'; TTATT-5C) that outperformed the existing AT-rich DNA reporter (5'-TTATT-3') used in most Cas12a-based target nucleic detection assays. By systematically investigating the effect of DNA reporter length and sequence on the trans-cleavage activity of Cas12a, we achieved up to a 100-fold increase in fluorescence signal intensity derived from the trans-cleavage activity of Cas12a compared to that achieved using the existing AT-rich DNA reporter. The new DNA reporter was also applied, along with the existing AT-rich DNA reporter, for the detection of the Salmonella enterotoxin (stn) gene. Importantly, both detection speed and limit were significantly enhanced with the new DNA reporter. In addition, polymerase chain reaction (PCR) was adopted to the CRISR/Cas-Based system of the new DNA reporter, thereby confirming its practical applicability. The high-efficiency DNA reporter described herein can pave the way for further improving the trans-cleavage activity of other Cas proteins, as well as the sensitivity of CRISPR/Cas-Based systems. Supplementary Information The online version contains supplementary material available at 10.1007/s13206-022-00081-0.
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Affiliation(s)
- Seungjin Lee
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Deahan Nam
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Jung Soo Park
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Seokjoon Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Eun Sung Lee
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Byung Seok Cha
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Ki Soo Park
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
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26
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Lee D, Kim W, Lee JE, Lee JH, Kim YT, Lee SK, Oh SS, Park KS, Koh SB, Kim C, Jung YC. Altered thalamic gray matter volume in firefighters with heavy alcohol use. Drug Alcohol Depend 2021; 229:109099. [PMID: 34813988 DOI: 10.1016/j.drugalcdep.2021.109099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 08/20/2021] [Accepted: 08/20/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Alcohol, a known addictive substance, affects the structural properties of the brain. In this study, we explored associations between alcohol use and gray matter properties among firefighters, who are often exposed to significant occupational stress. METHODS Gray matter volume (GMV) was evaluated using voxel-based morphometry in 287 male firefighters (mean age: 48.8 ± 7.7 years). Firefighters were classified into 32 never-drinkers, 162 non-heavy alcohol users, and 93 heavy alcohol users according to their alcohol consumption. GMV was compared between groups, and the correlations between GMV and alcohol use were investigated. A voxel-wise height threshold of p < 0.001 (uncorrected) was used, with small volume correction applied on cluster level. RESULTS Heavy alcohol users had lower GMV in the bilateral thalamus than non-heavy alcohol users or never-drinkers. Heavy alcohol users also showed lower GMV in the left insula, compared to other groups. The higher the alcohol consumption among firefighters, the lower the GMV of the right thalamus. CONCLUSIONS The results of this study show that heavy alcohol use has an association with lower GMV in several core regions, including the thalamus. When considering the impact of these brain regions on cognitive and behavioral control, our findings suggest a need for concern about heavy alcohol use among firefighters.
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Affiliation(s)
- Deokjong Lee
- Department of Psychiatry, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin 16995, Republic of Korea; Institute of Behavioral Science in Medicine, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
| | - Woojin Kim
- Department of Preventive Medicine, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
| | - Jung Eun Lee
- Institute of Behavioral Science in Medicine, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
| | - Jung Han Lee
- Institute of Behavioral Science in Medicine, Yonsei University College of Medicine, Seoul 03722, Republic of Korea; Department of Psychiatry, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
| | - Yun Tae Kim
- Department of Public Health, Yonsei University Graduate School, Seoul 03722, Republic of Korea
| | - Seung Koo Lee
- Department of Radiology, Severance Hospital, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
| | - Sung Soo Oh
- Department of Occupational and Environmental Medicine, Wonju Severance Christian Hospital, Yonsei University Wonju College of Medicine, Wonju 26426, Republic of Korea
| | - Ki Soo Park
- Department of Preventive Medicine and Institute of Health Sciences, College of Medicine, and Department of Bio & Medical Big Data, Gyeongsang National University, Jinju 52757, Republic of Korea
| | - Sang Baek Koh
- Department of Preventive Medicine, Yonsei University Wonju College of Medicine, Wonju 26426, Republic of Korea
| | - Changsoo Kim
- Department of Preventive Medicine, Yonsei University College of Medicine, Seoul 03722, Republic of Korea; Department of Public Health, Yonsei University Graduate School, Seoul 03722, Republic of Korea
| | - Young-Chul Jung
- Institute of Behavioral Science in Medicine, Yonsei University College of Medicine, Seoul 03722, Republic of Korea; Department of Psychiatry, Yonsei University College of Medicine, Seoul 03722, Republic of Korea.
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27
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Cho SG, Kim YH, Park HJ, Park KS, Kim JH, Ahn SJ, Bom HS. Prediction of radiation-related cardiotoxicity using F-18 FDG PET in non-small-cell lung cancer. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.2844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Radiation-related cardiotoxicity has been refocused nowadays as the follow-up was increased amomg the patients with advanced lung cancer. The early recognition of the occult cardiotoxicity enables the early intervention preventing clinically significant cardiac events or worsening of severity.
Purpose
We aim to search whether the F-18 fluorodeoxyglucose positron emission tomography (FDG PET) performed immediately after radiotherapy could predict the late cardiac events.
Methods
We retrospectively enrolled 133 patients with locally advanced, unresectable stage III NSCLC who underwent F-18 fluorodeoxyglucose positron emission tomography (FDG PET) immediately after CCRT for the response evaluation and survived at least for 6 months. Heart was recontoured according to the RTOG 0617 secondary analysis atlas for the dose volume analysis. Standardized uptake values (SUV) of the left ventricular myocardium were measured on FDG PET images. The patients were regularly followed up for the disease progression and complications. The primary end-point was the cardiac events grade ≥2 based on the Common Terminology Criteria for Adverse Events (version 5.0).
Results
FDG PET was performed at median interval of 11 days after CCRT. Fourty-two patients experienced cardiotoxicity during a median follow-up of 47 months (range, 12 – 123 months). In univariable analysis, mean heart dose, maximum SUV of the left ventricle (LV SUVmax), white blood cell count, and diabetes were associated with the risk of cardiotoxicity. In multivariable analysis, only higher mean heart dose (>11.1 Gy, hazard ratio 3.930 [95% confidence interval 1.933–7.988]; p=0.0002) and higher LV SUVmax (>12.84, 2.189 [1.162–4.124]; p=0.0152) were independently associated with increased risk of cardiotoxicity. In subgroup analyses, LV SUVmax remained predictive of cardiotoxicity among those with higher mean heart dose, but not among those with lower mean heart dose.
Conclusion
Early FDG PET after CCRT for NSCLC could predict the late cardiac events, especially in patients with high dose cardiac irradiation.
Funding Acknowledgement
Type of funding sources: Public Institution(s). Main funding source(s): This work was supported by a grant of the Basic Science Research Program through the National Research Foundation funded by the Ministry of Education, Republic of Korea (Principal Investigator: Sang-Geon Cho)
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Affiliation(s)
- S G Cho
- Chonnam National University Hospital, Nuclear Medicine, Gwangju, Korea (Republic of)
| | - Y H Kim
- Chonnam National University Hwasun Hospital, Radiation Oncology, Hwasun, Korea (Republic of)
| | - H J Park
- Chonnam National University Hwasun Hospital, Cardiololgy, Hwasun, Korea (Republic of)
| | - K S Park
- Chonnam National University Hospital, Nuclear Medicine, Gwangju, Korea (Republic of)
| | - J H Kim
- Chonnam National University Hospital, Nuclear Medicine, Gwangju, Korea (Republic of)
| | - S J Ahn
- Chonnam National University Hwasun Hospital, Radiation Oncology, Hwasun, Korea (Republic of)
| | - H S Bom
- Chonnam National University Hwasun Hospital, Nuclear Medicine, Hwasun, Korea (Republic of)
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28
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Cho MC, Park KS, Shin JK, Lee SA, Cho IA, Jo HC, Kim SC, Choi WJ. Correlational analysis of bone health status and vitamin D-related biomarkers in women working in agriculture. Medicine (Baltimore) 2021; 100:e27071. [PMID: 34449504 PMCID: PMC8389890 DOI: 10.1097/md.0000000000027071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 08/03/2021] [Indexed: 01/09/2023] Open
Abstract
The purpose of this study was to investigate the status of bone health in women working in agriculture and analyze the associations between bone health and various vitamin D-related biomarkers.This observational study enrolled women working in agriculture (n = 210) and control occupations (n = 180). The concentration of serum total 25-hydroxy vitamin D [25(OH)D] was measured using the Elecsys Vitamin D Total Kit, and serum vitamin D-binding protein (VDBP) was measured by enzyme-linked immunosorbent assay. Along with albumin, 25(OH)D and VDBP were used to calculate the concentrations of bioavailable and free 25(OH)D. Bone mineral density (BMD) and T-score were measured at lumbar 1 to 4 and the femur neck using dual-energy X-ray absorptiometry. To identify factors affecting BMD, log-linear model and linear regression analysis were performed for statistical analysis.Agricultural women workers showed higher serum concentrations of bioavailable 25(OH)D (12.8 ± 3.7 vs 8.7 ± 5.1 ng/mL) and lower VDBP concentrations (201.8 ± 45.0 vs 216.0 ± 68.2 μg/mL) than control women. The association between these 2 vitamin D related-biomarkers and femur neck BMD were confirmed through univariable and multivariable linear model analysis. Although lumbar BMD did not differ between groups, the agricultural group displayed a lower femur BMD and a 4.3-fold increase in the risk of osteoporosis compared with the control group.Women working in agriculture showed lower femur BMD than the control group. Of the vitamin D-related biomarkers tested, bioavailable 25(OH)D and VDBP were associated with BMD. As bioavailable 25(OH)D levels are affected mainly by VDBP levels, VDBP may play a role in the lower femur neck BMD values observed in the agricultural group. Thus, the measurement of VDBP concentration might be considered a simple and non-invasive method for measuring bone health status.
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Affiliation(s)
- Min-Chul Cho
- Department of Laboratory Medicine, Gyeongsang National University College of Medicine and Gyeongsang National University Hospital, Republic of Korea
- Institute of Health Sciences, Gyeongsang National University, Jinju, Republic of Korea
| | - Ki Soo Park
- Institute of Health Sciences, Gyeongsang National University, Jinju, Republic of Korea
- Department of Preventive Medicine, Gyeongsang National University College of Medicine, Republic of Korea
| | - Jeong Kyu Shin
- Institute of Health Sciences, Gyeongsang National University, Jinju, Republic of Korea
- Department of Obstetrics and Gynecology, Gyeongsang National University College of Medicine and Gyeongsang National University Hospital, Republic of Korea
| | - Soon Ae Lee
- Institute of Health Sciences, Gyeongsang National University, Jinju, Republic of Korea
- Department of Obstetrics and Gynecology, Gyeongsang National University College of Medicine and Gyeongsang National University Hospital, Republic of Korea
| | - In Ae Cho
- Institute of Health Sciences, Gyeongsang National University, Jinju, Republic of Korea
- Department of Obstetrics and Gynecology, Gyeongsang National University Hospital, Republic of Korea
| | - Hyen Chul Jo
- Institute of Health Sciences, Gyeongsang National University, Jinju, Republic of Korea
- Department of Obstetrics and Gynecology, Gyeongsang National University Changwon Hospital, Republic of Korea
| | - Seung Chan Kim
- Biostatistics Cooperation Center, Gyeongsang National University Hospital, Jinju, Republic of Korea
| | - Won Jun Choi
- Institute of Health Sciences, Gyeongsang National University, Jinju, Republic of Korea
- Department of Obstetrics and Gynecology, Gyeongsang National University College of Medicine and Gyeongsang National University Hospital, Republic of Korea
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29
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Il Kim M, Park CY, Seo JM, Kang KS, Park KS, Kang J, Hong KS, Choi Y, Lee SY, Park JP, Park HG, Park TJ. In Situ Biosynthesis of a Metal Nanoparticle Encapsulated in Alginate Gel for Imageable Drug-Delivery System. ACS Appl Mater Interfaces 2021; 13:36697-36708. [PMID: 34313117 DOI: 10.1021/acsami.1c02286] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Development of drug-delivery systems that allow simultaneous in vivo imaging has gained much interest. We report a novel strategy to encapsulate metal nanoparticles (NPs) within alginate gel for in vivo imaging. The cell lysate of recombinant Escherichia coli strain, expressing Arabidopsis thaliana phytochelatin synthase and Pseudomonas putida metallothionein genes, was encapsulated within the alginate gel. Incubation of alginate gel with metal ion precursors followed by UV irradiation resulted in the synthesis of high concentrations of metal NPs, such as Au, Ag, CdSe, and EuSe NPs, within the gel. The alginate gel with metal NPs was used as a drug-delivery system by further co-encapsulating doxorubicin and rifampicin, the release of which was made to be pH-dependent. This system can be conveniently and safely used for in vitro and in vivo bioimaging, enabled by the metal NPs formed within the gel matrix without using toxic reducing reagents or surfactants.
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Affiliation(s)
- Moon Il Kim
- Department of Chemical and Biomolecular Engineering (BK21+ Program), KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
- Department of BioNano Technology, Gachon University, 1342 Seongnamdaero, Sujeong-gu, Seongnam, Gyeonggi-do 13120, Republic of Korea
| | - Chan Yeong Park
- Department of Chemistry, Research Institute of Chem-Bio Diagnostic Technology, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea
| | - Ji Min Seo
- Department of Chemistry, Research Institute of Chem-Bio Diagnostic Technology, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea
| | - Kyoung Suk Kang
- Department of Chemical and Biomolecular Engineering (BK21+ Program), KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Ki Soo Park
- Department of Biological Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea
| | - Jongeun Kang
- Bioimaging Research Team, Korea Basic Science Institute, 162 Yeongudanji-ro, Ochang-eup, Cheongju, Chungcheongbuk-do 28119, Republic of Korea
- Graduate School of Analytical Science and Technology, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Kwan Soo Hong
- Bioimaging Research Team, Korea Basic Science Institute, 162 Yeongudanji-ro, Ochang-eup, Cheongju, Chungcheongbuk-do 28119, Republic of Korea
- Graduate School of Analytical Science and Technology, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Yoojin Choi
- Department of Chemical and Biomolecular Engineering (BK21+ Program), KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Sang Yup Lee
- Department of Chemical and Biomolecular Engineering (BK21+ Program), KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Jong Pil Park
- Department of Food Science and Biotechnology, School of Food Science and Technology, Chung-Ang University, 4726 Seodong-daero, Anseong 17546, Republic of Korea
| | - Hyun Gyu Park
- Department of Chemical and Biomolecular Engineering (BK21+ Program), KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Tae Jung Park
- Department of Chemistry, Research Institute of Chem-Bio Diagnostic Technology, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea
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Kim JH, Kim S, Hwang SH, Yoon TH, Park JS, Lee ES, Woo J, Park KS. Three-Way Junction-Induced Isothermal Amplification with High Signal-to-Background Ratio for Detection of Pathogenic Bacteria. Sensors (Basel) 2021; 21:s21124132. [PMID: 34208674 PMCID: PMC8235052 DOI: 10.3390/s21124132] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 06/10/2021] [Accepted: 06/12/2021] [Indexed: 11/30/2022]
Abstract
The consumption of water and food contaminated by pathogens is a major cause of numerous diseases and deaths globally. To control pathogen contamination and reduce the risk of illness, a system is required that can quickly detect and monitor target pathogens. We developed a simple and reproducible strategy, termed three-way junction (3WJ)-induced transcription amplification, to detect target nucleic acids by rationally combining 3WJ-induced isothermal amplification with a light-up RNA aptamer. In principle, the presence of the target nucleic acid generates a large number of light-up RNA aptamers (Spinach aptamers) through strand displacement and transcription amplification for 2 h at 37 °C. The resulting Spinach RNA aptamers specifically bind to fluorogens such as 3,5-difluoro-4-hydroxybenzylidene imidazolinone and emit a highly enhanced fluorescence signal, which is clearly distinguished from the signal emitted in the absence of the target nucleic acid. With the proposed strategy, concentrations of target nucleic acids selected from the genome of Salmonellaenterica serovar Typhi (S. Typhi) were quantitatively determined with high selectivity. In addition, the practical applicability of the method was demonstrated by performing spike-and-recovery experiments with S. Typhi in human serum.
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Hwang SH, Kim JH, Park J, Park KS. Fluorescence nucleobase analogue-based strategy with high signal-to-noise ratio for ultrasensitive detection of food poisoning bacteria. Analyst 2021; 145:6307-6312. [PMID: 32706347 DOI: 10.1039/d0an01026j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
We developed a simple and ultrasensitive strategy for the identification of foodborne pathogens utilizing a fluorescent nucleobase analogue [2-aminopurine (2-AP)]-containing split G-quadruplex that binds blocker DNA. Compared to a previous strategy that did not use blocker DNA, this strategy showed a significant increase in the signal-to-noise ratio-by approximately 300%-owing to the displacement of the blocker DNA by the target DNA that induces the formation of an active G-quadruplex structure, thereby leading to a substantial increase in the 2-AP fluorescence signal. The proposed strategy was rationally combined with polymerase chain reaction, which resulted in the successful determination of genomic DNA (within the range of 10-106 copies) derived from the food poisoning bacterium Escherichia coli, with a limit of detection of 5.2 copies and high selectivity. In addition, the practical applicability of this method was demonstrated by analyzing E. coli-spiked lettuce samples.
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Affiliation(s)
- Sung Hyun Hwang
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea.
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Lee ES, Cha BS, Kim S, Park KS. Synthesis of Exosome-Based Fluorescent Gold Nanoclusters for Cellular Imaging Applications. Int J Mol Sci 2021; 22:ijms22094433. [PMID: 33922681 PMCID: PMC8122875 DOI: 10.3390/ijms22094433] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 04/18/2021] [Accepted: 04/21/2021] [Indexed: 12/24/2022] Open
Abstract
In recent years, fluorescent metal nanoclusters have been used to develop bioimaging and sensing technology. Notably, protein-templated fluorescent gold nanoclusters (AuNCs) are attracting interest due to their excellent fluorescence properties and biocompatibility. Herein, we used an exosome template to synthesize AuNCs in an eco-friendly manner that required neither harsh conditions nor toxic chemicals. Specifically, we used a neutral (pH 7) and alkaline (pH 11.5) pH to synthesize two different exosome-based AuNCs (exo-AuNCs) with independent blue and red emission. Using field-emission scanning electron microscopy, energy dispersive X-ray microanalysis, nanoparticle tracking analysis, and X-ray photoelectron spectroscopy, we demonstrated that AuNCs were successfully formed in the exosomes. Red-emitting exo-AuNCs were found to have a larger Stokes shift and a stronger fluorescence intensity than the blue-emitting exo-AuNCs. Both exo-AuNCs were compatible with MCF-7 (human breast cancer), HeLa (human cervical cancer), and HT29 (human colon cancer) cells, although blue-emitting exo-AuNCs were cytotoxic at high concentrations (≥5 mg/mL). Red-emitting exo-AuNCs successfully stained the nucleus and were compatible with membrane-staining dyes. This is the first study to use exosomes to synthesize fluorescent nanomaterials for cellular imaging applications. As exosomes are naturally produced via secretion from almost all types of cell, the proposed method could serve as a strategy for low-cost production of versatile nanomaterials.
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Kim S, Park KS. Fluorescence resonance energy transfer using DNA-templated copper nanoparticles for ratiometric detection of microRNAs. Analyst 2021; 146:1844-1847. [PMID: 33606855 DOI: 10.1039/d0an02371j] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
We examined the effectiveness of a ratiometric method using DNA-templated copper nanoparticles, which can function as a probe for fluorescence resonance energy transfer. This method in combination with PCR successfully detected the target microRNA, which corresponded well with the results obtained by quantitative reverse transcription PCR.
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Affiliation(s)
- Seokjoon Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea.
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Seo AR, Kim MJ, Kim B, Seo YM, Lee GY, Park KS, Yoo JI. Associations between Frailty in Older Adults and Malnutrition in Rural Areas: 2019 Updated Version of the Asian Working Group for Sarcopenia. Yonsei Med J 2021; 62:249-254. [PMID: 33635015 PMCID: PMC7934103 DOI: 10.3349/ymj.2021.62.3.249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 12/21/2020] [Accepted: 12/28/2020] [Indexed: 11/27/2022] Open
Abstract
PURPOSE The purpose of this study was to evaluate the prevalence of frailty among an older adult population living in rural communities and to determine if frailty is associated with nutritional status after adjusting for sarcopenia and depression. MATERIALS AND METHODS This research used baseline data from the Namgaram-2 study. Frailty was evaluated using the Kaigo-Yobo checklist in an older Korean population. The nutritional statuses of older people were measured using the Korean version of the mini nutritional assessment (MNA). The recent criteria of the Asian Working Group for Sarcopenia were applied for diagnosis of sarcopenia, and depression was assessed using the Geriatric Depression Scale-Short Form. RESULTS The prevalence of frailty was 18.8% (male: 9.6%; female: 23.4%) and was significantly higher in individuals in their 80s [male, 35.3% (p<0.001); female, 42.3% (p<0.001)], those of poor economic status [male, 18.2% (p=0.012); female, 34.9% (p<0.001)], those with hypertension [female, 27.7% (p=0.008)], those with sarcopenia [male, 34.1% (p<0.001); female, 37.2% (p<0.001)], those with depression [male, 46.4% (p<0.001); female, 51.7% (p<0.001)], and those at high risk of malnutrition [male, 44.4% (p<0.001); female, 51.7% (p<0.001)]. After adjusting for demographic variables, including hypertension, diabetes, sarcopenia and depression, frailty was significantly associated with nutritional status [male: odds ratio (OR)=6.73, 95% confidence interval (CI), 1.84-24.65; female: OR=4.83, 95% CI, 2.88-8.11]. CONCLUSION For older adults, MNA is a suitable tool of use in assessing both nutritional status and frailty. Moreover, the nutritional status of older adults appears to be associated with frailty, even after corrections for physical and psychological function.
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Affiliation(s)
- Ae Rim Seo
- Department of Preventive Medicine and Institute of Health Sciences, College of Medicine, Gyeongsang National University, Jinju, Korea
- Center for Farmer's Safety and Health, Gyeongsang National University Hospital, Jinju, Korea
| | - Mi Ji Kim
- Department of Preventive Medicine and Institute of Health Sciences, College of Medicine, Gyeongsang National University, Jinju, Korea
| | - Bokyoung Kim
- Department of Preventive Medicine and Institute of Health Sciences, College of Medicine, Gyeongsang National University, Jinju, Korea
- Center for Farmer's Safety and Health, Gyeongsang National University Hospital, Jinju, Korea
| | - Young Mi Seo
- Center for Farmer's Safety and Health, Gyeongsang National University Hospital, Jinju, Korea
| | - Gyeong Ye Lee
- Center for Farmer's Safety and Health, Gyeongsang National University Hospital, Jinju, Korea
| | - Ki Soo Park
- Department of Preventive Medicine and Institute of Health Sciences, College of Medicine, Gyeongsang National University, Jinju, Korea
- Center for Farmer's Safety and Health, Gyeongsang National University Hospital, Jinju, Korea
- Department of Bio & Medical Big Data, Gyeongsang National University, Jinju, Korea.
| | - Jun Il Yoo
- Department of Orthopedic Surgery, Gyeongsang National University Hospital, Jinju, Korea.
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Li P, Lee SM, Kim HY, Kim S, Park S, Park KS, Park HG. Colorimetric detection of individual biothiols by tailor made reactions with silver nanoprisms. Sci Rep 2021; 11:3937. [PMID: 33594153 PMCID: PMC7886879 DOI: 10.1038/s41598-021-83433-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 01/28/2021] [Indexed: 11/09/2022] Open
Abstract
We herein described a rapid, sensitive, and selective colorimetric sensing platform for biothiols in human serum, which relies on the dual functions of biothiols as anti-etching and aggregating agent for silver nanoprisms (AgNPRs). In principle, the target biothiols that bind to the surface of AgNPRs through Ag–S covalent interactions protect the AgNPRs from being etched by chloride ion (Cl−) in human serum, thus exhibiting the blue/purple color that is indicative of AgNPRs. On the other hand, the color of AgNPRs turned to yellow in the absence of biothiols or the presence of non-sulfur-containing amino acids, indicating the formation of small silver nanoparticles (AgNPs). Importantly, we found that individual biothiols (Hcy, Cys, and GSH) exert not only the anti-etching effect, but also the aggregating effect on AgNPRs, which can be modulated by simply tuning the pH conditions, and this consequently allows for the discriminative detection of each biothiol. Based on this simple and cost-effective strategy, we successfully determined the Hcy, Cys, and GSH in human serum with high sensitivity and selectivity within 10 min, demonstrating the diagnostic capability and potential in practical applications.
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Affiliation(s)
- Pei Li
- Department of Chemical and Biomolecular Engineering (BK 21+ Program), KAIST, Daehak-ro 291, Yuseong-gu, Daejeon, 34141, Republic of Korea.,Department of Materials Science and Engineering, KAIST, Daehak-ro 291, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Sang Mo Lee
- Department of Chemical and Biomolecular Engineering (BK 21+ Program), KAIST, Daehak-ro 291, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Hyo Yong Kim
- Department of Chemical and Biomolecular Engineering (BK 21+ Program), KAIST, Daehak-ro 291, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Soohyun Kim
- Department of Chemical and Biomolecular Engineering (BK 21+ Program), KAIST, Daehak-ro 291, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Steve Park
- Department of Materials Science and Engineering, KAIST, Daehak-ro 291, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Ki Soo Park
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, 05029, Republic of Korea.
| | - Hyun Gyu Park
- Department of Chemical and Biomolecular Engineering (BK 21+ Program), KAIST, Daehak-ro 291, Yuseong-gu, Daejeon, 34141, Republic of Korea.
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Guan N, Li Y, Yang H, Hu P, Lu S, Ren H, Liu Z, Soo Park K, Zhou Y. Dual-functionalized gold nanoparticles probe based bio-barcode immuno-PCR for the detection of glyphosate. Food Chem 2021; 338:128133. [PMID: 33091994 DOI: 10.1016/j.foodchem.2020.128133] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 09/01/2020] [Accepted: 09/16/2020] [Indexed: 01/16/2023]
Abstract
Glyphosate (GLYP) was the most widely used broad-spectrum herbicide in the world. Herein, a gold nanoparticle (AuNP) probe dual-functionalized with anti-GLYP antibody and double-stranded oligonucleotides was synthesized. An AuNP-based bio-barcode immuno-PCR (AuNP-BB-iPCR) based on the probe was developed for sensitive detection of GLYP in food samples without high-cost and time-consuming experiments. GLYP detection was accomplished with a linear range from 61.1 pg g-1 to 31.3 ng g-1 and a detection limit of 4.5 pg g-1 which was 7 orders of magnitude lower than that of conventional ELISA (70 μg g-1) developed using the same antibody. The recoveries of GLYP from soybean, cole and maize samples were 99.8%, 102.6% and 103.7%, respectively, and all relative standard deviation values were below 12.9%. The assay time (including food samples preparation) of AuNP-BB-iPCR was 4 h. The proposed AuNP-BB-iPCR exhibits potential for sensitive detection of GLYP in foodstuffs and environment.
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Affiliation(s)
- Naiyu Guan
- Key Laboratory of Zoonoses Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun 130062, PR China
| | - Yansong Li
- Key Laboratory of Zoonoses Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun 130062, PR China
| | - Hualin Yang
- College of Animal Sciences, Yangtze University, Jingzhou 434023, PR China
| | - Pan Hu
- Key Laboratory of Zoonoses Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun 130062, PR China
| | - Shiying Lu
- Key Laboratory of Zoonoses Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun 130062, PR China
| | - Honglin Ren
- Key Laboratory of Zoonoses Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun 130062, PR China
| | - Zengshan Liu
- Key Laboratory of Zoonoses Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun 130062, PR China
| | - Ki Soo Park
- Department of Biological Engineering, Konkuk University, Seoul 05029, Republic of Korea.
| | - Yu Zhou
- Key Laboratory of Zoonoses Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun 130062, PR China; College of Animal Sciences, Yangtze University, Jingzhou 434023, PR China.
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Abstract
We identified a novel 12 bp promoter that significantly increased transcription efficiency. Unlike the standard 20 bp promoter, which contains both recognition and initiation regions, the new promoter contains only a recognition region and is more suitable for diagnostic applications due to its smaller size. This promoter effectively produced different light-up RNA aptamers via transcription. Moreover, we used the promoter to analyze RNase H activity and achieved a detection limit of 0.009 U mL-1, which was significantly better than that achieved via previous methods. We propose that the new promoter may serve as a key component in various diagnostic applications.
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Affiliation(s)
- Jisu Woo
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea.
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Abstract
When imaging cells, nuclear counterstaining is imperative; however, many commercial nuclear-staining dyes based on nucleic acid intercalation result in nonspecific signals in the cytoplasm. Here, we propose a new strategy that stains the nucleus with high specificity by in situ formation of DNA-templated copper nanoparticles (CuNPs). We demonstrated that genomic DNA in the nucleus enabled rapid formation of highly fluorescent CuNPs immediately following addition of a copper ion source and ascorbate as a reducing agent. Moreover, we found that RNA and mitochondrial DNA, largely responsible for nonspecific cytoplasmic signals from commercial nuclear-staining dyes, did not mediate the formation of the highly fluorescent CuNPs, resulting in highly specific nuclear staining at a reduced cost relative to commercially available methods. Furthermore, we verified the compatibility of the proposed method with other fluorescence-labeling techniques. These results demonstrated the efficacy of this method and its promise as a powerful tool for cell imaging.
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Affiliation(s)
- Seokjoon Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea.
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Cha BS, Lee ES, Kim S, Kim JM, Hwang SH, Oh SS, Park KS. Simple colorimetric detection of organophosphorus pesticides using naturally occurring extracellular vesicles. Microchem J 2020. [DOI: 10.1016/j.microc.2020.105130] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Bagheri Hashkavayi A, Cha BS, Lee ES, Kim S, Park KS. Advances in Exosome Analysis Methods with an Emphasis on Electrochemistry. Anal Chem 2020; 92:12733-12740. [PMID: 32902258 DOI: 10.1021/acs.analchem.0c02745] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Exosomes, small extracellular vesicles, are released by various cell types. They are found in bodily fluids, including blood, urine, serum, and saliva, and play essential roles in intercellular communication. Exosomes contain various biomarkers, such as nucleic acids and proteins, that reflect the status of their parent cells. Since they influence tumorigenesis and metastasis in cancer patients, exosomes are excellent noninvasive potential indicators for early cancer detection. Aptamers with specific binding properties have distinct advantages over antibodies, making them effective versatile bioreceptors for the detection of exosome biomarkers. Here, we review various aptamer-based exosome detection approaches based on signaling methods, such as fluorescence, colorimetry, and chemiluminescence, focusing on electrochemical strategies that are easier, cost-effective, and more sensitive than others. Further, we discuss the clinical applications of electrochemical exosome analysis strategies as well as future research directions in this field.
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Affiliation(s)
- Ayemeh Bagheri Hashkavayi
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Byung Seok Cha
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Eun Sung Lee
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Seokjoon Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Ki Soo Park
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
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Abstract
We herein describe a portable glucose meter (PGM)-utilized label-free and washing-free method for the facile determination of telomerase activity that relies on the kinase-catalyzed cascade enzymatic reaction (KCER) that transduces the telomerase activity to the glucose level. In the sensor, the telomerase that elongates telomere sequences ((TTAGGG)n) from the 3'-terminus of telomerase substrate primer (TSP) consumes deoxynucleoside triphosphate (dNTP), which serves as a phosphate source for KCER promoted by hexokinase and pyruvate kinase. Thus, the presence of telomerase protects KCER from working effectively, resulting in the maintenance of an initial, high glucose level that is readily determined using hand-held PGM. With this strategy, the telomerase activities in various types of cell lines were successfully determined with high sensitivity. Furthermore, the ability of this method to screen candidate inhibitors for telomerase activity was also verified.
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Affiliation(s)
- Hyo Yong Kim
- Department of Chemical and Biomolecular Engineering (BK21+ Program), KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.
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Kim HY, Song J, Park KS, Park HG. Simple and label-free strategy for terminal transferase assay using a personal glucose meter. Chem Commun (Camb) 2020; 56:8912-8915. [PMID: 32638717 DOI: 10.1039/d0cc02869j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
We herein developed a simple personal glucose meter (PGM)-based method for terminal transferase (TdT) activity assay by utilizing the glucose oxidase (GOx)-mimicking activity of cerium oxide nanoparticles (CeO2 NPs). Using this strategy, the TdT activity was reliably determined down to 0.7 U mL-1 with high selectivity against other non-specific enzymes.
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Affiliation(s)
- Hyo Yong Kim
- Department of Chemical and Biomolecular Engineering (BK21+ Program), KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.
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Lim SM, Seo SH, Park KS, Hwangbo Y, Suh Y, Ji S, Kang J, Hwang H, Cruz JRB, Park YH. Performance of a Community-based Noncommunicable Disease Control Program in Korea: Patients 65 Years of Age or Older. J Korean Med Sci 2020; 35:e268. [PMID: 32776722 PMCID: PMC7415998 DOI: 10.3346/jkms.2020.35.e268] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 06/07/2020] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND In Korea, the Korean Community-based Noncommunicable Disease Prevention and Control Program (KCNPC) was implemented in 2012 for the management of patients with chronic diseases. Nineteen primary care clinics, public health centers, and education and consulting centers (ECCs) participated in the implementation of this program. This study assessed the effectiveness of this chronic disease control model by comparing mortality rate and the incidence of complications between patients participating in the KCNPC program and a control group. METHODS Using data from the National Health Insurance Service and data from hypertension and diabetes patients registered with 19 ECCs between January 1, 2010 and December 31, 2012, hypertension and diabetes patients who had been treated at a clinic were selected. The final analysis included 252,900 patients, with the intervention group and control group having 126,450 patients each. Survival for the two groups was analyzed using the Kaplan-Meier method. Complications were analyzed using the Cox proportional hazards model. RESULTS The 5-year survival rate in the intervention group (0.88) was higher than that in the control group (0.86). Cox proportional hazards analysis showed that the intervention group had lower risk for mortality (0.84; 95% confidence interval [CI], 0.82-0.86) compared to the control group. Hospitalization due to complications and the proportional risk of hospitalization were also lower in the intervention group. CONCLUSION The KCNPC model for prevention and control of chronic disease in Korea was found to be effective for hypertension and diabetes patients. Therefore, the KCNPC will be necessary to strengthen the capabilities of local communities, primary medical institutions, and individuals for prevention and control of chronic disease. Expanding the efficient prevention and control policies of the KCNPC to a nationwide scale may be effective as has been demonstrated through limited implementation in some regions.
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Affiliation(s)
- Sun Mi Lim
- Department of Preventive Medicine, Soonchunhyang University College of Medicine, Cheonan, Korea
| | - Sung Hyo Seo
- Department of Information Statistics, Gyeongsang National University, Jinju, Korea
| | - Ki Soo Park
- Department of Preventive Medicine, College of Medicine and Institute of Health Science, Gyeongsang National University, Jinju, Korea
| | - Young Hwangbo
- Department of Preventive Medicine, Soonchunhyang University College of Medicine, Cheonan, Korea
| | - Yeonok Suh
- Department of Nursing, Soonchunhyang University College of Medicine, Cheonan, Korea
| | - Sungin Ji
- Department of Preventive Medicine, Soonchunhyang University College of Medicine, Cheonan, Korea
| | - Jeongmook Kang
- Department of Preventive Medicine, Soonchunhyang University College of Medicine, Cheonan, Korea
| | - Hyeonji Hwang
- Department of Preventive Medicine, Soonchunhyang University College of Medicine, Cheonan, Korea
| | - Jose Rene Bagani Cruz
- Department of Preventive Medicine, Soonchunhyang University College of Medicine, Cheonan, Korea
| | - Yoon Hyung Park
- Department of Preventive Medicine, Soonchunhyang University College of Medicine, Cheonan, Korea.
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Hwang SH, Kim JM, Kim S, Yoon MJ, Park KS. Chemical Transformation of Astaxanthin from Haematococcus pluvialis Improves Its Antioxidative and Anti-inflammatory Activities. ACS Omega 2020; 5:19120-19130. [PMID: 32775914 PMCID: PMC7408224 DOI: 10.1021/acsomega.0c02479] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 07/13/2020] [Indexed: 05/04/2023]
Abstract
Astaxanthin is a strong antioxidant, but the effect of esterification on its biological activities remains unclear. Here, we chemically synthesized three forms of astaxanthin (nonesterified (Ast-N), monoesterified (Ast-mE), and diesterified (Ast-dE) forms) using esterified astaxanthin (Ast-E) in natural extract from Haematococcus pluvialis and characterized them by spectrophotometry and high-performance liquid chromatography (HPLC). Additionally, the antioxidant and anti-inflammatory activities of the samples containing three forms of astaxanthin at different ratios were evaluated. The sample containing the maximum level of Ast-mE compared to those of Ast-N and Ast-dE showed the highest antioxidant and anti-inflammatory activities. We also observed the greatest increase in expression of genes related to antioxidant and anti-inflammatory effects in samples containing the highest Ast-mE. These results provide a foundation for in-depth investigation of astaxanthin and other antioxidant molecules, allowing for the development of a practical and cost-effective strategy to improve antioxidant or anti-inflammatory activities of natural extracts that can be used as dietary supplements.
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Affiliation(s)
- Sung Hyun Hwang
- Department of Biological Engineering, College of
Engineering, Konkuk University, Seoul 05029, Republic
of Korea
| | - Ji Min Kim
- Department of Biological Engineering, College of
Engineering, Konkuk University, Seoul 05029, Republic
of Korea
| | - Seokjoon Kim
- Department of Biological Engineering, College of
Engineering, Konkuk University, Seoul 05029, Republic
of Korea
| | - Min Jin Yoon
- Natural Bio Tree,
Seongnam-si, Gyeonggi 13449, Republic of Korea
| | - Ki Soo Park
- Department of Biological Engineering, College of
Engineering, Konkuk University, Seoul 05029, Republic
of Korea
- ;
. Phone/Fax: +82-2-450-3742
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Kalimuthu K, Kim JM, Subburaman C, Kwon WY, Hwang SH, Jeong S, Jo MG, Kim HJ, Park KS. Characterization of Rajath Bhasma and Evaluation of Its Toxicity in Zebrafish Embryos and Its Antimicrobial Activity. J Microbiol Biotechnol 2020; 30:920-925. [PMID: 32238767 PMCID: PMC9728409 DOI: 10.4014/jmb.1911.11018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Accepted: 03/16/2020] [Indexed: 12/15/2022]
Abstract
In India, nanotechnology has been used in therapeutic applications for several millennia. One example of a traditional nanomedicine is Rajath Bhasma (als°Called calcined silver ash), which is used as an antimicrobial and for the treatment of various ailments and conditions such as memory loss, eye diseases, and dehydration. In this study, we aimed t°Characterize the physical composition and morphology of Rajath Bhasma and its suitability for use as a non-toxic antimicrobial agent. First, Rajath Bhasma was physically characterized via i) Fourier-transform infrared spectroscopy to analyze the surface functional groups, ii) scanning electron microscopy coupled with energydispersive X-ray spectroscopy to observe the morphology and elemental composition, and iii) X-ray diffraction to determine the crystalline phases. Thereafter, functional characterization was performed through toxicity screening using zebrafish embryos and through antimicrobial activity assessment against gram-positive (Staphylococcus epidermidis) and gram-negative (Escherichia coli) bacteria. Rajath Bhasma was found to harbor alkene, hydroxyl, aldehyde, and amide functional groups originating from biological components on its surface. The main component of Rajath Bhasma is silver, with particle size of 170-210 nm, and existing in the form of spherical aggregates with pure crystalline silver structures. Furthermore, Rajath Bhasma did not exert toxic effects on zebrafish embryos at concentrations below 5 μg/ml and exhibited effective antimicrobial activity against both gram-positive and gram-negative bacteria. The present results indicate that Rajath Bhasma is a potentially effective antimicrobial agent without toxicity when used at concentrations below 5 μg/ml.
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Affiliation(s)
- Kalishwaralal Kalimuthu
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Ji Min Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | | | - Woo Young Kwon
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Sung Hyun Hwang
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Sehan Jeong
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Min Geun Jo
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Hyung Joo Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Ki Soo Park
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea,Corresponding author Phone: +82-2-450-3742 Fax: +82-2-450-3742 E-mail: ;
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Yoo JI, Park KS, Seo SH, Park HW. Osteoporosis and hearing loss: findings from the Korea National Health and Nutrition Examination Survey 2009–2011. Braz J Otorhinolaryngol 2020; 86:332-338. [PMID: 30827872 PMCID: PMC9422524 DOI: 10.1016/j.bjorl.2018.12.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 11/27/2018] [Accepted: 12/17/2018] [Indexed: 02/06/2023] Open
Abstract
Introduction Age-related hearing impairment is the most common sensory dysfunction in older adults. In osteoporosis, the mass of the ossicles will be decreased, affecting the bone density of the cochlea, and interfering with the sound transmission to the cochlea. Age related hearing loss might be closely related to osteoporosis. Objective To determine the relationship between age-related hearing impairment and osteoporosis by investigating the relationship between hearing loss and cortical bone density evaluated from femur neck bone mineral density. Methods We used data from the Korea National Health and Nutrition Examination Survey to examine the associations between osteoporosis and age-related hearing impairment from 2009 to 2011. Total number of participants was 4861 including 2273 men and 2588 women aged 50 years or older. Osteoporosis was defined as a bone mineral density 2.5 standard deviations below according to the World Health Organization diagnostic classification. Age-related hearing impairment was defined as the pure-tone averages of test frequencies 0.5, 1, 2, and 4 kHz at a threshold of 40 dB or higher on the more impaired hearing side. Results Total femur T-score (p < 0.001), lumbar-spine T-score (p < 0.001) and, femur neck T-score (p < 0.001) were significantly lower in the osteoporosis group compared to the normal group. Thresholds of pure-tone averages were significantly different in normal compared to osteopenia, and osteoporosis groups. In addition, there were significantly higher pure-tone averages thresholds in the osteoporosis group compared to other groups (p < 0.001). After adjusting for all covariates, the odds ratio for hearing loss was significantly increased by 1.7 fold with reduced femur neck bone mineral density (p < 0.01). However, lumbar spine bone mineral density was not statistically associated with hearing loss (p = 0.22). Conclusion Our results suggest that osteoporosis is significantly associated with a risk of hearing loss. In addition, femur neck bone mineral density was significantly correlated with hearing loss, but lumbar spine bone mineral density was not.
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Park EJ, Lee H, Kim HC, Sheen SS, Koh SB, Park KS, Cho NH, Lee CM, Kang DR. Residential Radon Exposure and Cigarette Smoking in Association with Lung Cancer: A Matched Case-Control Study in Korea. Int J Environ Res Public Health 2020; 17:E2946. [PMID: 32344675 PMCID: PMC7215527 DOI: 10.3390/ijerph17082946] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 04/21/2020] [Accepted: 04/22/2020] [Indexed: 12/19/2022]
Abstract
Residential radon exposure and cigarette smoking are the two most important risk factors for lung cancer. The combined effects thereof were evaluated in a multi-center matched case-control study in South Korea. A total of 1038 participants were included, comprising 519 non-small cell lung cancer cases and 519 age- and sex- matched community-based controls. Residential radon levels were measured for all participants. Multivariate logistic regression was used to calculate odds ratios (OR) for lung cancer according to radon exposure (high ≥ 100 Bq/m3 vs. low < 100 Bq/m3), smoking status, and combinations of the two after adjusting for age, sex, indoor hours, and other housing information. The median age of the participants was 64 years, and 51.3% were women. The adjusted ORs (95% confidence intervals [CIs]) for high radon and cigarette smoking were 1.56 (1.03-2.37) and 2.53 (1.60-3.99), respectively. When stratified according to combinations of radon exposure and smoking status, the adjusted ORs (95% CIs) for lung cancer in high-radon non-smokers, low-radon smokers, and high-radon smokers were 1.40 (0.81-2.43), 2.42 (1.49-3.92), and 4.27 (2.14-8.52), respectively, with reference to low-radon non-smokers. Both residential radon and cigarette smoking were associated with increased odds for lung cancer, and the difference in ORs according to radon exposure was much greater in smokers than in non-smokers.
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Affiliation(s)
- Eung Joo Park
- Department of Precision Medicine & Biostatistics, Yonsei University Wonju College of Medicine, Wonju 26426, Korea;
- Center of Biomedical Data Science, Yonsei University Wonju College of Medicine, Wonju 26426, Korea
| | - Hokyou Lee
- Department of Preventive Medicine, Yonsei University College of Medicine, Seoul 03722, Korea; (H.L.); (H.C.K.)
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Hyeon Chang Kim
- Department of Preventive Medicine, Yonsei University College of Medicine, Seoul 03722, Korea; (H.L.); (H.C.K.)
- Cardiovascular and Metabolic Disease Etiology Research Center, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Seung Soo Sheen
- Department of Pulmonary and Critical Care Medicine, Ajou University School of Medicine, Suwon 16499, Korea;
| | - Sang Baek Koh
- Department of Preventive Medicine, Yonsei University Wonju College of Medicine, Wonju 26426, Korea;
| | - Ki Soo Park
- Department of Preventive Medicine, School of Medicine, Gyeongsang National University, Jinju 52828, Korea;
| | - Nam Han Cho
- Department of Preventive Medicine, Ajou University School of Medicine, Suwon 16499, Korea;
| | - Cheol-Min Lee
- Department of Chemical and Biological Engineering, Seokyeong University, Seoul 02713, Korea;
| | - Dae Ryong Kang
- Department of Precision Medicine & Biostatistics, Yonsei University Wonju College of Medicine, Wonju 26426, Korea;
- Center of Biomedical Data Science, Yonsei University Wonju College of Medicine, Wonju 26426, Korea
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Kim HY, Park KS, Park HG. Glucose oxidase-like activity of cerium oxide nanoparticles: use for personal glucose meter-based label-free target DNA detection. Theranostics 2020; 10:4507-4514. [PMID: 32292511 PMCID: PMC7150472 DOI: 10.7150/thno.41484] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Accepted: 01/20/2020] [Indexed: 02/07/2023] Open
Abstract
Recently, personal glucose meter (PGM) has been utilized for the detection of non-glucose targets for point-of-care (POC) testing. Aimed at this goal, we herein developed a new PGM-based label-free read-out method for polymerase chain reaction (PCR) based on our novel finding that cerium oxide nanoparticles (CeO2 NPs) exhibit glucose oxidase-like activity comparable to the natural glucose oxidase enzyme. Methods: In principle, DNA amplicons produced by PCR in the presence of target DNA electrostatically bind to CeO2 NPs, leading to their aggregation and reducing the efficiency for CeO2 NP-catalyzed glucose oxidation reaction. Thus, glucose is hardly oxidized to gluconic acid, resulting in the maintenance of initial high glucose level. On the contrary, in the absence of target DNA or presence of non-target DNA, DNA amplicons are not produced and glucose is effectively oxidized by the glucose oxidase-like activity of CeO2 NPs, leading to the significant reduction of glucose level. Finally, the resulting glucose level is simply measured by using PGM. Results: With this strategy, DNA amplicons were quantitatively examined within 5 min, realizing ultrafast analysis of PCR results without any cumbersome and labor-intensive procedures. In addition, the target genomic DNA derived from Escherichia coli (E. coli) was sensitively determined down to 10 copies with high selectivity. Conclusion: Importantly, the use of PGM as a detection component enables its direct application in POC settings. Based on the meritorious features of PGM such as rapidity, simplicity, and cost-effectiveness, we expect that the devised system could serve as a core platform for the on-site read-out of PCR amplification.
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Affiliation(s)
- Hyo Yong Kim
- Department of Chemical and Biomolecular Engineering (BK21+ Program), KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Ki Soo Park
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Hyun Gyu Park
- Department of Chemical and Biomolecular Engineering (BK21+ Program), KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
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Park SH, Kang BH, Kim MJ, Kim B, Lee GY, Seo YM, Yoo JI, Park KS. Validation of the Western Ontario and McMaster Universities Arthritis Index Short Form (WOMAC-SF) and Its Relevance to Disability and Frailty. Yonsei Med J 2020; 61:251-256. [PMID: 32102126 PMCID: PMC7044687 DOI: 10.3349/ymj.2020.61.3.251] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 02/07/2020] [Accepted: 02/10/2020] [Indexed: 11/27/2022] Open
Abstract
PURPOSE This study aimed to evaluate the validity of the Western Ontario and McMaster Universities Arthritis Index Short Form (WOMAC-SF) for the assessment of musculoskeletal disorders. We evaluated whether WOMAC-SF correlated with the World Health Organization Disability Assessment Schedule 12 (WHODAS-12) and Kaigo-Yobo questionnaires for assessing health-outcomes in Korea. MATERIALS AND METHODS This cross-sectional study used data from the Namgaram-2 cohort. WOMAC, WOMAC-SF, WHODAS-12, and Kaigo-Yobo questionnaires were administered to patients with musculoskeletal disorders, including radiology-confirmed knee osteoarthritis (RKOA), sarcopenia, and osteoporosis. The relationships among WOMAC-SF, WHODAS-12, and Kaigo-Yobo scores were analyzed by stepwise multiple regression analysis. RESULTS WOMAC-SF was associated with the WOMAC questionnaire. The results of confirmatory factor analysis for the hypothesized model with two latent factors, pain and function, provided satisfactory fit indices. WOMAC-SF pain and function were associated with RKOA. Kaigo-Yobo was associated with WOMAC-SF pain (B=0.140, p=0.001) and WOMAC-SF function (B=0.042, p=0.004). WHODAS-12 was associated with WOMAC-SF pain (B=0.679, p=0.003) and WOMAC-SF function (B=0.804, p<0.001). CONCLUSION WOMAC-SF was validated for the evaluation of low extremity musculoskeletal disorders and health-related quality of life in a community-based population. Furthermore, we confirmed that WOMAC-SF were reflective of disability and frailty, which affect health outcomes.
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Affiliation(s)
- Soo Hyun Park
- Department of Preventive Medicine, College of Medicine and Institute of Health Science, Gyeongsang National University, Jinju, Korea
| | - Byeong Hun Kang
- Department of Orthopedic Surgery, Gyeongsang National University Hospital, Jinju, Korea
| | - Mi Ji Kim
- Department of Preventive Medicine, College of Medicine and Institute of Health Science, Gyeongsang National University, Jinju, Korea
- Center for Farmer's Safety and Health, Gyeongsang National University Hospital, Jinju, Korea
| | - Bokyoung Kim
- Department of Preventive Medicine, College of Medicine and Institute of Health Science, Gyeongsang National University, Jinju, Korea
- Center for Farmer's Safety and Health, Gyeongsang National University Hospital, Jinju, Korea
| | - Gyeong Ye Lee
- Center for Farmer's Safety and Health, Gyeongsang National University Hospital, Jinju, Korea
| | - Young Mi Seo
- Center for Farmer's Safety and Health, Gyeongsang National University Hospital, Jinju, Korea
| | - Jun Il Yoo
- Department of Orthopedic Surgery, Gyeongsang National University Hospital, Jinju, Korea.
| | - Ki Soo Park
- Department of Preventive Medicine, College of Medicine and Institute of Health Science, Gyeongsang National University, Jinju, Korea
- Center for Farmer's Safety and Health, Gyeongsang National University Hospital, Jinju, Korea.
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Santoso A, Yoon TR, Park KS, Anwar IB, Utomo P, Soetjahjo B, Sibarani T. The Results of Two-stage Revision for Methicillin-resistant Periprosthetic Joint Infection (PJI) of the Hip. Malays Orthop J 2020; 14:18-23. [PMID: 32296477 PMCID: PMC7156181 DOI: 10.5704/moj.2003.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Introduction: Periprosthetic joint infection (PJI) of the hip due to methicillin-resistant bacteria is difficult to treat and remain a challenge for arthroplasty surgeon. Material and Methods: Retrospective review was done to the patients who received two-stage revisions with an antibiotic loaded cement-spacer for PJI of the hip between January 2010 to May 2015. We found 65 patients (65 hips) with positive culture findings. Eight patients were lost to follow-up and excluded from the study. Among the rest of the 57 patients, methicillin-resistant infection (MR Group) was found in 28 cases. We also evaluate the 29 other cases that caused by the other pathogen as control group. We compared all of the relevant medical records and the treatment outcomes between the two groups. Results: The mean of follow-up period was 33.7 months in the methicillin-resistant group and 28.4 months in the control group (p = 0.27). The causal pathogens in the methicillin-resistant group were: Methicillin-resistant Staphylococcus aureus (MRSA) in 10 cases, Methicillin-resistant Staphylococcus epidermidis (MRSE) in 16 cases and Methicillin-resistant coagulase-negative Staphylococcus (MRCNS) in two cases. The reimplantation rate was 92.8% and 89.6% in the methicillin-resistant and control group, respectively (p= 0.66). The rates of recurrent infection after reimplantation were 23.1% (6/26) in the methicillin-resistant group and 7.6% (2/26) in the control group (p= 0.12). The overall infection control rate was 71.4% (20/28) and 89.6% (26/29) in the methicillin-resistant and control group, respectively (p = 0.08). Both groups showed comparable baseline data on mean age, BMI, gender distribution, preoperative ESR/CRP/WBC and comorbidities. Conclusions: Two-stage revision procedure resulted in low infection control rate and high infection recurrency rate for the treatment of methicillin-resistant periprosthetic joint infection (PJI) of the hip. Development of the treatment strategy is needed to improve the outcome of methicillin-resistant periprosthetic joint infection (PJI) of the hip.
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Affiliation(s)
- A Santoso
- Department of Orthopaedic and Traumatology, Universitas Sebelas Maret, Solo, Indonesia
| | - T R Yoon
- Department of Orthopaedic Surgery, Chonnam National University Bitgoeul Hospital, Jeonnam, Republic of Korea
| | - K S Park
- Department of Orthopaedic Surgery, Chonnam National University Bitgoeul Hospital, Jeonnam, Republic of Korea
| | - I B Anwar
- Department of Orthopaedic and Traumatology, Universitas Sebelas Maret, Solo, Indonesia
| | - P Utomo
- Department of Orthopaedic and Traumatology, Universitas Sebelas Maret, Solo, Indonesia
| | - B Soetjahjo
- Department of Orthopaedic and Traumatology, Universitas Sebelas Maret, Solo, Indonesia
| | - T Sibarani
- Department of Orthopaedic and Traumatology, Universitas Sebelas Maret, Solo, Indonesia
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