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Kim A, Oh MS, Lee GH, Song S, Byun MS, Choi D, Yu BY, Lee H. Understanding the pharmacokinetic journey of Fc-fusion protein, rhIL-7-hyFc using complementary approach of two analytical methods, accelerator mass spectrometry and ELISA. Antib Ther 2024; 7:105-113. [PMID: 38566969 PMCID: PMC10983079 DOI: 10.1093/abt/tbae004] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 01/21/2024] [Accepted: 01/28/2024] [Indexed: 04/04/2024] Open
Abstract
Antibody-based therapeutics (ABTs), including monoclonal/polyclonal antibodies and fragment crystallizable region (Fc)-fusion proteins, are increasingly used in disease treatment, driving the global market growth. Understanding the pharmacokinetic (PK) properties of ABTs is crucial for their clinical effectiveness. This study investigated the PK profile and tissue distribution of efineptakin alfa, a long-acting recombinant human interleukin-7 (rhIL-7-hyFc), using enzyme-linked immunosorbent assay (ELISA) and accelerator mass spectrometry (AMS). Totally, four rats were injected intramuscularly with 1 mg/kg of rhIL-7-hyFc containing 14C-rhIL-7-hyFc, which was prepared via reductive methylation. Serum total radioactivity (TRA) and serum rhIL-7-hyFc concentrations were quantified using AMS and ELISA, respectively. The TRA concentrations in organs were determined by AMS. Serum TRA peaked at 10 hours with a terminal half-life of 40 hours. The rhIL-7-hyFc exhibited a mean peak concentration at around 17 hours and a rapid elimination with a half-life of 12.3 hours. Peak concentration and area under the curve of TRA were higher than those of rhIL-7-hyFc. Tissue distribution analysis showed an elevated TRA concentrations in lymph nodes, kidneys, and spleen, indicating rhIL-7-hyFc's affinity for these organs. The study also simulated the positions of 14C labeling in rhIL-7-hyFc, identifying specific residues in the fragment of rhIL-7 portion, and provided the explanation of distinct analytes targeted by each method. Combining ELISA and AMS provided advantages by offering sensitivity and specificity for quantification as well as enabling the identification of analyte forms. The integrated use of ELISA and AMS offers valuable insights for the development and optimization of ABT.
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Affiliation(s)
- Anhye Kim
- Department of Clinical Pharmacology and Therapeutics, CHA Bundang Medical Center, CHA University, Seongnam 13496, Republic of Korea
- Department of Biomedical Informatics, CHA University School of Medicine, CHA University, Seongnam 13488, Republic of Korea
- Institute for Biomedical Informatics, CHA University School of Medicine, CHA University, Seongnam 13488, Republic of Korea
| | - Min-Seok Oh
- Research Resources Division, Advanced Analysis and Data Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
- Department of Stem Cell Biology, School of Medicine, Konkuk University, Seoul 05029, Republic of Korea
| | - Gwan-Ho Lee
- Research Resources Division, Advanced Analysis and Data Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Seongeun Song
- Research Resources Division, Advanced Analysis and Data Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
- Department of Pharmacy, Yonsei Institute of Pharmaceutical Sciences, Yonsei University, Incheon 21983, Republic of Korea
| | - Mi-sun Byun
- Clinical Development Division, Genexine, Inc., Seoul 07789, Republic of Korea
| | - Donghoon Choi
- Research Institute, NeoImmuneTech, co. Ltd., Pohang 37666, Republic of Korea
| | - Byung-Yong Yu
- Research Resources Division, Advanced Analysis and Data Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Howard Lee
- Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul 08826, Republic of Korea
- Department of Clinical Pharmacology and Therapeutics, Seoul National University Hospital, Seoul 03080, Republic of Korea
- Advanced Institute of Convergence Technology, Suwon 16229, Republic of Korea
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Bae H, Yoo KH, Oh MS. Xanthogranulomatous inflammation of the lower jaw bone: a rare case report. J Korean Assoc Oral Maxillofac Surg 2023; 49:360-364. [PMID: 38155090 PMCID: PMC10761317 DOI: 10.5125/jkaoms.2023.49.6.360] [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: 07/07/2023] [Revised: 10/15/2023] [Accepted: 10/16/2023] [Indexed: 12/30/2023] Open
Abstract
Xanthogranulomatous inflammation (XGI) is an uncommon type of chronic inflammation and is histologically characterized by foamy histiocytes and giant cells. The most common sites of occurrence are kidneys and gallbladder. The etiology remains controversial. Involvement of the lower jaw bone is rare. In this study, we report a case of XGI presenting in the lower jaw.
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Affiliation(s)
- Hyesung Bae
- Department of Oral and Maxillofacial Surgery, Sun Dental Hospital, Daejeon, Korea
| | - Kil-Hwa Yoo
- Department of Oral and Maxillofacial Surgery, Daejeon Sun Hospital, Daejeon, Korea
| | - Min-Seok Oh
- Department of Oral and Maxillofacial Surgery, Sun Dental Hospital, Daejeon, Korea
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Oh MS, Lee SG, Lee GH, Kim CY, Song JH, Yu BY, Chung HM. Verification of Therapeutic Effect through Accelerator Mass Spectrometry-Based Single Cell Level Quantification of hESC-Endothelial Cells Distributed into an Ischemic Model. Adv Healthc Mater 2023; 12:e2300476. [PMID: 37068221 DOI: 10.1002/adhm.202300476] [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: 03/14/2023] [Revised: 04/01/2023] [Indexed: 04/19/2023]
Abstract
As the potential of pluripotent stem cell-derived differentiated cells has been demonstrated in regenerative medicine, differentiated vascular endothelial cells (ECs) are emerging as a therapeutic agent for the cardiovascular system. To verify the therapeutic efficacy of differentiated ECs in an ischemic model, human embryonic stem cells (hESCs) are induced as EC lineage and produce high-purity ECs through fluorescence-activated cell sorting (FACS). When hESC-ECs are transplanted into a hindlimb ischemic model, it is confirmed that blood flow and muscle regeneration are further improved by creating new blood vessels together with autologous ECs than the primary cell as cord blood endothelial progenitor cells (CB-EPCs). In addition, previously reported studies show the detection of transplanted cells engrafted in blood vessels through various tracking methods, but fail to provide accurate quantitative values over time. In this study, it is demonstrated that hESC-ECs are engrafted approximately sevenfold more than CB-EPCs by using an accelerator mass spectrometry (AMS)-based cell tracking technology that can perform quantification at the single cell level. An accurate quantification index is suggested. It has never been reported in in vivo kinetics of hESC-ECs that can act as therapeutic agents.
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Affiliation(s)
- Min-Seok Oh
- Department of Stem Cell Biology, School of Medicine, Konkuk University, 120 Neungdong-Ro, Gwangjin-Gu, Seoul, 05029, Republic of Korea
- Advanced Analysis and Data Center, Korea Institute of Science and Technology, Hwarang-ro 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea
| | - Seul-Gi Lee
- Department of Stem Cell Biology, School of Medicine, Konkuk University, 120 Neungdong-Ro, Gwangjin-Gu, Seoul, 05029, Republic of Korea
| | - Gwan-Ho Lee
- Advanced Analysis and Data Center, Korea Institute of Science and Technology, Hwarang-ro 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea
| | - C-Yoon Kim
- College of Veterinary Medicine, Konkuk University, Gwangjin-Gu, Seoul, 05029, Republic of Korea
| | - Jong Han Song
- Advanced Analysis and Data Center, Korea Institute of Science and Technology, Hwarang-ro 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea
| | - Byung-Yong Yu
- Advanced Analysis and Data Center, Korea Institute of Science and Technology, Hwarang-ro 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea
| | - Hyung Min Chung
- Department of Stem Cell Biology, School of Medicine, Konkuk University, 120 Neungdong-Ro, Gwangjin-Gu, Seoul, 05029, Republic of Korea
- Mirae Cell Bio Co. Ltd, Seoul, 04795, Republic of Korea
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Lee HY, Baek S, Cha M, Yang SH, Cho I, Shin H, Lee S, Kim HY, Lee S, Shin J, Lee D, Kim K, Park I, Yoon S, Kim J, Park SJ, Kim SM, Kim KE, Kim HJ, Oh MS, Lee GH, Yu BY, Kannan P, Park K, Kim Y. Amyloid Against Amyloid: Dimeric Amyloid Fragment Ameliorates Cognitive Impairments by Direct Clearance of Oligomers and Plaques. Angew Chem Int Ed Engl 2023; 62:e202210209. [PMID: 36316282 DOI: 10.1002/anie.202210209] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [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: 07/12/2022] [Revised: 10/07/2022] [Accepted: 10/26/2022] [Indexed: 01/13/2023]
Abstract
Amyloid-β (Aβ) in the form of neurotoxic aggregates is regarded as the main pathological initiator and key therapeutic target of Alzheimer's disease. However, anti-Aβ drug development has been impeded by the lack of a target needed for structure-based drug design and low permeability of the blood-brain barrier (BBB). An attractive therapeutic strategy is the development of amyloid-based anti-Aβ peptidomimetics that exploit the self-assembling nature of Aβ and penetrate the BBB. Herein, we designed a dimeric peptide drug candidate based on the N-terminal fragment of Aβ, DAB, found to cross the BBB and solubilize Aβ oligomers and fibrils. Administration of DAB reduced amyloid burden in 5XFAD mice, and downregulated neuroinflammation and prevented memory impairment in the Y-maze test. Peptide mapping assays and molecular docking studies were utilized to elucidate DAB-Aβ interaction. To further understand the active regions of DAB, we assessed the dissociative activity of DAB with sequence modifications.
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Affiliation(s)
- Hee Yang Lee
- Department of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University Yeonsu-gu, Incheon, 21983, South Korea
| | - Seungyeop Baek
- Department of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University Yeonsu-gu, Incheon, 21983, South Korea
| | - Minhae Cha
- Department of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University Yeonsu-gu, Incheon, 21983, South Korea
| | - Seung-Hoon Yang
- Department of Medical Biotechnology, Dongguk University Jung-gu, Seoul, 04620, South Korea
| | - Illhwan Cho
- Department of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University Yeonsu-gu, Incheon, 21983, South Korea
| | - Heewon Shin
- Department of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University Yeonsu-gu, Incheon, 21983, South Korea
| | - Sejin Lee
- Department of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University Yeonsu-gu, Incheon, 21983, South Korea
| | - Hye Yun Kim
- Department of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University Yeonsu-gu, Incheon, 21983, South Korea
| | - Songmin Lee
- Department of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University Yeonsu-gu, Incheon, 21983, South Korea
| | - Jisu Shin
- Department of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University Yeonsu-gu, Incheon, 21983, South Korea
| | - Donghee Lee
- Department of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University Yeonsu-gu, Incheon, 21983, South Korea
| | - Kyeonghwan Kim
- Department of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University Yeonsu-gu, Incheon, 21983, South Korea
| | - InWook Park
- Department of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University Yeonsu-gu, Incheon, 21983, South Korea
| | - Soljee Yoon
- Department of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University Yeonsu-gu, Incheon, 21983, South Korea.,Department of Integrative Biotechnology and Translational Medicine, Yonsei University Yeonsu-gu, Incheon, 21983, South Korea
| | - Jiyoon Kim
- Brain Science Institute, Korea Institute of Science and Technology Seongbuk-gu, Seoul, 02792, South Korea
| | - Seong Jeong Park
- Amyloid Solution Bundang-gu, Seongnam-si, Gyeonggi-do, 13486, South Korea
| | - Seong Muk Kim
- Amyloid Solution Bundang-gu, Seongnam-si, Gyeonggi-do, 13486, South Korea
| | - Ko Eun Kim
- Amyloid Solution Bundang-gu, Seongnam-si, Gyeonggi-do, 13486, South Korea
| | - Hye Ju Kim
- Amyloid Solution Bundang-gu, Seongnam-si, Gyeonggi-do, 13486, South Korea
| | - Min-Seok Oh
- Advanced Analysis and data Center, Korea Institute of Science and Technology Seongbuk-gu, Seoul, 02792, South Korea.,Department of Stem Cell Biology, Konkuk University Gwangjin-Gu, Seoul, 05029, South Korea
| | - Gwan-Ho Lee
- Advanced Analysis and data Center, Korea Institute of Science and Technology Seongbuk-gu, Seoul, 02792, South Korea
| | - Byung-Yong Yu
- Advanced Analysis and data Center, Korea Institute of Science and Technology Seongbuk-gu, Seoul, 02792, South Korea
| | - Priyadharshini Kannan
- Department of Biochemical Engineering, Gangneung-Wonju National University, Gangneung, 25457, South Korea.,Natural Product Informatics Research Center, Korea Institute of Science and Technology, Gangwon-do, 25451, South Korea
| | - Keunwan Park
- Natural Product Informatics Research Center, Korea Institute of Science and Technology, Gangwon-do, 25451, South Korea
| | - YoungSoo Kim
- Department of Pharmacy and Yonsei Institute of Pharmaceutical Sciences, Yonsei University Yeonsu-gu, Incheon, 21983, South Korea.,Department of Integrative Biotechnology and Translational Medicine, Yonsei University Yeonsu-gu, Incheon, 21983, South Korea.,Amyloid Solution Bundang-gu, Seongnam-si, Gyeonggi-do, 13486, South Korea
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5
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Lee SG, Kim YJ, Son MY, Oh MS, Kim J, Ryu B, Kang KR, Baek J, Chung G, Woo DH, Kim CY, Chung HM. Generation of human iPSCs derived heart organoids structurally and functionally similar to heart. Biomaterials 2022; 290:121860. [DOI: 10.1016/j.biomaterials.2022.121860] [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: 02/08/2022] [Revised: 09/30/2022] [Accepted: 10/09/2022] [Indexed: 11/02/2022]
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Baek J, Ryu B, Kim J, Lee SG, Oh MS, Hong KS, Kim EY, Kim CY, Chung HM. Immunomodulation of Pluripotent Stem Cell-Derived Mesenchymal Stem Cells in Rotator Cuff Tears Model. Biomedicines 2022; 10:biomedicines10071549. [PMID: 35884853 PMCID: PMC9312476 DOI: 10.3390/biomedicines10071549] [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] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 06/20/2022] [Accepted: 06/23/2022] [Indexed: 11/16/2022] Open
Abstract
Background: Rotator cuff tears (RCTs) induce chronic muscle weakness and shoulder pain. Treatment of RCT using surgery or drugs causes lipid infiltration and fibrosis, which hampers tissue regeneration and complete recovery. The pluripotent stem cell-derived multipotent mesenchymal stem cells (M-MSCs) represent potential candidate next-generation therapies for RCT. Methods: The difference between M-MSCs and adult-MSCs was compared and analyzed using next-generation sequencing (NGS). In addition, using a rat model of RCT, the muscle recovery ability of M-MSCs and adult-MSCs was evaluated by conducting a histological analysis and monitoring the cytokine expression level. Results: Using NGS, it was confirmed that M-MSC was suitable for transplantation because of its excellent ability to regulate inflammation that promotes tissue repair and reduced apoptosis and rejection during transplantation. In addition, while M-MSCs persisted for up to 8 weeks in vivo, they significantly reduced inflammation and adipogenesis-related cytokine levels in rat muscle. Significant differences were also confirmed in histopathological remission. Conclusions: M-MSCs remain in the body longer to modulate immune responses in RCTs and have a greater potential to improve muscle recovery by alleviating acute inflammatory responses. This indicates that M-MSCs could be used in potential next-generation RCT therapies.
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Affiliation(s)
- Jieun Baek
- Departmentof Stem Cell Biology, School of Medicine, Konkuk University, Seoul 05029, Korea; (J.B.); (S.-G.L.); (M.-S.O.)
| | - Bokyeong Ryu
- College of Veterinary Medicine, Konkuk University, Seoul 05029, Korea; (B.R.); (J.K.)
- Department of Laboratory Animal Medicine, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea
| | - Jin Kim
- College of Veterinary Medicine, Konkuk University, Seoul 05029, Korea; (B.R.); (J.K.)
- Department of Laboratory Animal Medicine, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea
| | - Seul-Gi Lee
- Departmentof Stem Cell Biology, School of Medicine, Konkuk University, Seoul 05029, Korea; (J.B.); (S.-G.L.); (M.-S.O.)
| | - Min-Seok Oh
- Departmentof Stem Cell Biology, School of Medicine, Konkuk University, Seoul 05029, Korea; (J.B.); (S.-G.L.); (M.-S.O.)
- Advanced Analysis Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
| | - Ki-Sung Hong
- Mireacellbio Co., Ltd., Seoul 04795, Korea; (K.-S.H.); (E.-Y.K.)
| | - Eun-Young Kim
- Mireacellbio Co., Ltd., Seoul 04795, Korea; (K.-S.H.); (E.-Y.K.)
| | - C-Yoon Kim
- College of Veterinary Medicine, Konkuk University, Seoul 05029, Korea; (B.R.); (J.K.)
- Correspondence: (C.-Y.K.); (H.-M.C.); Tel.: +82-10-9140-0136 (C.-Y.K.); +82-10-7190-1926 (H.-M.C.); Fax: +82-2-455-9012 (C.-Y.K. & H.-M.C.)
| | - Hyung-Min Chung
- Departmentof Stem Cell Biology, School of Medicine, Konkuk University, Seoul 05029, Korea; (J.B.); (S.-G.L.); (M.-S.O.)
- Mireacellbio Co., Ltd., Seoul 04795, Korea; (K.-S.H.); (E.-Y.K.)
- Correspondence: (C.-Y.K.); (H.-M.C.); Tel.: +82-10-9140-0136 (C.-Y.K.); +82-10-7190-1926 (H.-M.C.); Fax: +82-2-455-9012 (C.-Y.K. & H.-M.C.)
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7
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Lee MK, Kim KN, Jeong MA, Kim SY, Oh MS, Kwon BS. Facemask ventilation and vocal cord angle following neuromuscular blockade: a prospective observational study . Anaesthesia 2022; 77:1010-1017. [PMID: 35727620 DOI: 10.1111/anae.15786] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/16/2022] [Indexed: 11/29/2022]
Abstract
Numerous studies support the idea that neuromuscular blockade facilitates facemask ventilation after induction of anaesthesia. Although improved airway patency or pulmonary compliance and a resolution of laryngospasm have been suggested as possible causes, the exact mechanism remains unclear. We aimed to assess whether neuromuscular blockade improves facemask ventilation and to clarify whether this phenomenon is associated with the vocal cord angle. This prospective observational study included patients aged between 20 and 65 years scheduled for elective surgery under general anaesthesia. After induction of anaesthesia, patients' lungs were ventilated with pressure-controlled ventilation using a facemask. During facemask ventilation, a flexible bronchoscope was inserted through a self-sealing diaphragm at the elbow connector attached to the facemask and breathing circuit and positioned to allow a continuous view of the vocal cords. The mean tidal volume and vocal cord angle were measured before and after administration of neuromuscular blocking drugs. Of 108 patients, 100 completed the study. Mean (SD) tidal volume ((11.0 (3.9) ml.kg-1 vs. 13.6 (2.6) ml.kg-1 ; p < 0.001) and mean (SD) vocal cord angle (17° (10°) vs. 26° (5°); p < 0.001) increased significantly after neuromuscular blockade. The proportional increase in mean tidal volume after neuromuscular blockade was positively correlated with vocal cord angle (Spearman's ρ = 0.803; p < 0.001). In conclusion, neuromuscular blockade facilitated facemask ventilation, and the improvement was correlated with further opening of the vocal cords.
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Affiliation(s)
- M K Lee
- Department of Anaesthesiology and Pain Medicine, Hanyang University Seoul Hospital, Seoul, Republic of Korea
| | - K N Kim
- Department of Anaesthesiology and Pain Medicine, Hanyang University Seoul Hospital, Seoul, Republic of Korea
| | - M A Jeong
- Department of Anaesthesiology and Pain Medicine, Hanyang University Seoul Hospital, Seoul, Republic of Korea
| | - S Y Kim
- Department of Anaesthesiology and Pain Medicine, Hanyang University Seoul Hospital, Seoul, Republic of Korea
| | - M S Oh
- College of Medicine, Hanyang University Seoul Hospital, Seoul, Republic of Korea
| | - B S Kwon
- Department of Anaesthesiology and Pain Medicine, Hanyang University Seoul Hospital, Seoul, Republic of Korea
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Kang KR, Kim J, Ryu B, Lee SG, Oh MS, Baek J, Ren X, Canavero S, Kim CY, Chung HM. BAPTA, a calcium chelator, neuroprotects injured neurons in vitro and promotes motor recovery after spinal cord transection in vivo. CNS Neurosci Ther 2021; 27:919-929. [PMID: 33942993 PMCID: PMC8265943 DOI: 10.1111/cns.13651] [Citation(s) in RCA: 3] [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] [Received: 12/30/2020] [Revised: 03/25/2021] [Accepted: 04/11/2021] [Indexed: 12/27/2022] Open
Abstract
Aim Despite animal evidence of a role of calcium in the pathogenesis of spinal cord injury, several studies conducted in the past found calcium blockade ineffective. However, those studies involved oral or parenteral administration of Ca++ antagonists. We hypothesized that Ca++ blockade might be effective with local/immediate application (LIA) at the time of neural injury. Methods In this study, we assessed the effects of LIA of BAPTA (1,2‐bis (o‐aminophenoxy) ethane‐N, N, N′, N'‐tetraacetic acid), a cell‐permeable highly selective Ca++ chelator, after spinal cord transection (SCT) in mice over 4 weeks. Effects of BAPTA were assessed behaviorally and with immunohistochemistry. Concurrently, BAPTA was submitted for the first time to multimodality assessment in an in vitro model of neural damage as a possible spinal neuroprotectant. Results We demonstrate that BAPTA alleviates neuronal apoptosis caused by physical damage by inhibition of neuronal apoptosis and reactive oxygen species (ROS) generation. This translates to enhanced preservation of electrophysiological function and superior behavioral recovery. Conclusion This study shows for the first time that local/immediate application of Ca++ chelator BAPTA is strongly neuroprotective after severe spinal cord injury.
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Affiliation(s)
- Kyu-Ree Kang
- Department of Stem Cell Biology, School of Medicine, Konkuk University, Seoul, Korea
| | - Jin Kim
- Laboratory Animal Medicine, College of Veterinary Medicine, Seoul National University, Seoul, Korea
| | - Bokyeong Ryu
- Laboratory Animal Medicine, College of Veterinary Medicine, Seoul National University, Seoul, Korea
| | - Seul-Gi Lee
- Department of Stem Cell Biology, School of Medicine, Konkuk University, Seoul, Korea
| | - Min-Seok Oh
- Department of Stem Cell Biology, School of Medicine, Konkuk University, Seoul, Korea
| | - Jieun Baek
- Department of Stem Cell Biology, School of Medicine, Konkuk University, Seoul, Korea
| | - Xiaoping Ren
- Department of Orthopedics, Ruikang Hospital, Nanning, China.,GICUP-Global Initiative to Cure Paralysis, Columbus, Ohio, USA
| | - Sergio Canavero
- GICUP-Global Initiative to Cure Paralysis, Columbus, Ohio, USA.,HEAVEN/GEMINI International Collaborative Group, Turin, Italy
| | - C-Yoon Kim
- Department of Stem Cell Biology, School of Medicine, Konkuk University, Seoul, Korea.,GICUP-Global Initiative to Cure Paralysis, Columbus, Ohio, USA.,Department of Physiology, College of Veterinary Medicine, Konkuk University, Seoul, Korea
| | - Hyung Min Chung
- Department of Stem Cell Biology, School of Medicine, Konkuk University, Seoul, Korea
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Islam AKMM, Noh HH, Ro JH, Kim D, Oh MS, Son K, Kwon H. Optimization and validation of a method for the determination of acidic pesticides in cabbage and spinach by modifying QuEChERS procedure and liquid chromatography-tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2021; 1173:122667. [PMID: 33915385 DOI: 10.1016/j.jchromb.2021.122667] [Citation(s) in RCA: 3] [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: 10/11/2020] [Revised: 03/10/2021] [Accepted: 03/11/2021] [Indexed: 01/26/2023]
Abstract
A quick, easy, cheap, effective, rugged, and safe (QuEChERS) method was developed and combined with liquid chromatography-tandem mass spectrometry to analyze 12 acidic pesticides in cabbage and spinach. The extraction solvents, phase partition salts and sorbents effect was studied to optimize the method followed by dilution before sample injection. The extraction involved 5% formic acid in acetonitrile, and the liquid-liquid partition was salt-induced. Carbopack Z, a high surface area graphitized carbon black, was a new sorbent used in the clean-up. The results show that Carbopack Z effectively removes interferences with little loss of acidic pesticides. All tested pesticide recoveries were satisfactory when Carbopack Z was combined with C18 in the clean-up at optimized condition. After clean-up, the extract was subjected to 10-fold dilution to sufficiently reduce the matrix effect (<20%). The limit of quantification (LOQ) was 1-5 ng/g, and the mean recovery was between 95 and 110% with a relative standard deviation <20% (between 2% and 10%) for the spiking of three concentrations: 5, 50, and 500 ng/g. The extract was less pigmented in the modified QuEChERS method than its original version. Thus, the modified method is a useful alternative for investigating the acidic pesticide residues in cabbage and spinach.
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Affiliation(s)
- Abul Kasem Mohammad Mydul Islam
- Department of Agro-food Safety and Crop Protection, National Institute of Agricultural Sciences, Rural Development Administration, Iseo-myeon, Wanju-gun, Jeollabuk-do 55365, Republic of Korea
| | - Hyun Ho Noh
- Department of Agro-food Safety and Crop Protection, National Institute of Agricultural Sciences, Rural Development Administration, Iseo-myeon, Wanju-gun, Jeollabuk-do 55365, Republic of Korea
| | - Jin-Ho Ro
- Department of Agro-food Safety and Crop Protection, National Institute of Agricultural Sciences, Rural Development Administration, Iseo-myeon, Wanju-gun, Jeollabuk-do 55365, Republic of Korea
| | - Danbi Kim
- Department of Agro-food Safety and Crop Protection, National Institute of Agricultural Sciences, Rural Development Administration, Iseo-myeon, Wanju-gun, Jeollabuk-do 55365, Republic of Korea
| | - Min-Seok Oh
- Department of Agro-food Safety and Crop Protection, National Institute of Agricultural Sciences, Rural Development Administration, Iseo-myeon, Wanju-gun, Jeollabuk-do 55365, Republic of Korea
| | - Kyungae Son
- Department of Agro-food Safety and Crop Protection, National Institute of Agricultural Sciences, Rural Development Administration, Iseo-myeon, Wanju-gun, Jeollabuk-do 55365, Republic of Korea
| | - Hyeyoung Kwon
- Department of Agro-food Safety and Crop Protection, National Institute of Agricultural Sciences, Rural Development Administration, Iseo-myeon, Wanju-gun, Jeollabuk-do 55365, Republic of Korea; Planning and Coordination Bureau, Rural Development Administration, Deokjin-gu, Jeonju-si, Jeollabukdo, 54875, Republic of Korea.
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Lee SG, Kim J, Oh MS, Ryu B, Kang KR, Baek J, Lee JM, Choi SO, Kim CY, Chung HM. Development and validation of dual-cardiotoxicity evaluation method based on analysis of field potential and contractile force of human iPSC-derived cardiomyocytes / multielectrode assay platform. Biochem Biophys Res Commun 2021; 555:67-73. [PMID: 33813278 DOI: 10.1016/j.bbrc.2021.03.039] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Accepted: 03/08/2021] [Indexed: 11/24/2022]
Abstract
A recent in vitro cardiovascular safety pharmacology test uses cardiomyocytes derived from human induced pluripotent stem cells (hiPSCs) to overcome the limitations of the classical test systems, such as species differences and local channel analysis. The Comprehensive in vitro Proarrhythmia Assay (CiPA) is a new proarrhythmia screening paradigm proposed by a CiPA steering expert group, which essentially requires iPSCs derived cardiomyocyte-based electrophysiological evaluation technology. Moreover, the measurement of the contractile force is also emerging as an important parameter to recapitulate non-proarrhythmic cardiotoxicity. Therefore, we constructed an multielectrode assay (MEA) evaluation method that can measure the electrophysiological changes with 6 reference drugs in hiPSC-derived cardiomyocytes. Subsequently, it was confirmed that the electrophysiological were changed in accordance with the mechanism of action of the drugs. Furthermore, based on the multi-probe impedance, we confirmed the decrease in contractile force due to treatment with drugs, and developed a platform to evaluate cardiotoxicity according to drugs along with field potential changes. Our excitation-contraction coupling cardiotoxicity assessment is considered to be more supportive in cardiac safety studies on pharmacologic sensitivity by complementing each assessment parameter.
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Affiliation(s)
- Seul-Gi Lee
- Department of Stem Cell Biology, School of Medicine, Konkuk University, 120 Neungdong-Ro, Gwangjin-Gu, Seoul, 143-701, Republic of Korea
| | - Jin Kim
- Department of Laboratory Animal Medicine, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | - Min-Seok Oh
- Department of Stem Cell Biology, School of Medicine, Konkuk University, 120 Neungdong-Ro, Gwangjin-Gu, Seoul, 143-701, Republic of Korea
| | - Bokyeong Ryu
- Department of Laboratory Animal Medicine, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | - Kyu-Ree Kang
- Department of Stem Cell Biology, School of Medicine, Konkuk University, 120 Neungdong-Ro, Gwangjin-Gu, Seoul, 143-701, Republic of Korea
| | - Jieun Baek
- Department of Stem Cell Biology, School of Medicine, Konkuk University, 120 Neungdong-Ro, Gwangjin-Gu, Seoul, 143-701, Republic of Korea
| | - Jin-Moo Lee
- Pharmacological Research Division, Toxicological Evaluation and Research Department, National Institute of Food and Drug Safety Evaluation, Ministry of Food and Drug Safety, Republic of Korea
| | - Sun-Ok Choi
- Pharmacological Research Division, Toxicological Evaluation and Research Department, National Institute of Food and Drug Safety Evaluation, Ministry of Food and Drug Safety, Republic of Korea
| | - C-Yoon Kim
- College of Veterinary Medicine, Konkuk University, Seoul, 05029, Republic of Korea.
| | - Hyung Min Chung
- Department of Stem Cell Biology, School of Medicine, Konkuk University, 120 Neungdong-Ro, Gwangjin-Gu, Seoul, 143-701, Republic of Korea.
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Oh MS, Lee SG, Lee GH, Kim CY, Kim EY, Song JH, Yu BY, Chung HM. In vivo tracking of 14C thymidine labeled mesenchymal stem cells using ultra-sensitive accelerator mass spectrometry. Sci Rep 2021; 11:1360. [PMID: 33446731 PMCID: PMC7809063 DOI: 10.1038/s41598-020-80416-9] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 12/21/2020] [Indexed: 12/20/2022] Open
Abstract
Despite the tremendous advancements made in cell tracking, in vivo imaging and volumetric analysis, it remains difficult to accurately quantify the number of infused cells following stem cell therapy, especially at the single cell level, mainly due to the sensitivity of cells. In this study, we demonstrate the utility of both liquid scintillator counter (LSC) and accelerator mass spectrometry (AMS) in investigating the distribution and quantification of radioisotope labeled adipocyte derived mesenchymal stem cells (AD-MSCs) at the single cell level after intravenous (IV) transplantation. We first show the incorporation of 14C-thymidine (5 nCi/ml, 24.2 ng/ml) into AD-MSCs without affecting key biological characteristics. These cells were then utilized to track and quantify the distribution of AD-MSCs delivered through the tail vein by AMS, revealing the number of AD-MSCs existing within different organs per mg and per organ at different time points. Notably, the results show that this highly sensitive approach can quantify one cell per mg which effectively means that AD-MSCs can be detected in various tissues at the single cell level. While the significance of these cells is yet to be elucidated, we show that it is possible to accurately depict the pattern of distribution and quantify AD-MSCs in living tissue. This approach can serve to incrementally build profiles of biodistribution for stem cells such as MSCs which is essential for both research and therapeutic purposes.
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Affiliation(s)
- Min-Seok Oh
- Department of Stem Cell Biology, School of Medicine, Konkuk University, 120 Neungdong-Ro, Gwangjin-Gu, 05029, Republic of Korea
| | - Seul-Gi Lee
- Department of Stem Cell Biology, School of Medicine, Konkuk University, 120 Neungdong-Ro, Gwangjin-Gu, 05029, Republic of Korea
| | - Gwan-Ho Lee
- Advanced Analysis Center, Korea Institute of Science and Technology, Hwarang-ro 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea
| | - C-Yoon Kim
- Department of Stem Cell Biology, School of Medicine, Konkuk University, 120 Neungdong-Ro, Gwangjin-Gu, 05029, Republic of Korea
| | - Eun-Young Kim
- Mirae Cell Bio Co. Ltd, Seoul, 04795, Republic of Korea
| | - Jong Han Song
- Advanced Analysis Center, Korea Institute of Science and Technology, Hwarang-ro 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea
| | - Byung-Yong Yu
- Advanced Analysis Center, Korea Institute of Science and Technology, Hwarang-ro 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea.
| | - Hyung Min Chung
- Department of Stem Cell Biology, School of Medicine, Konkuk University, 120 Neungdong-Ro, Gwangjin-Gu, 05029, Republic of Korea. .,Mirae Cell Bio Co. Ltd, Seoul, 04795, Republic of Korea.
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12
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Lee EJ, Ahn YC, Kim YI, Oh MS, Park YC, Son CG. Incidence Rate of Hypersensitivity Reactions to Bee-Venom Acupuncture. Front Pharmacol 2020; 11:545555. [PMID: 33117156 PMCID: PMC7577189 DOI: 10.3389/fphar.2020.545555] [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] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Accepted: 09/11/2020] [Indexed: 12/15/2022] Open
Abstract
Introduction Bee-venom acupuncture (BVA) has been widely applied to various disorders including pain-related diseases; however, patients are often warned of adverse reactions such as anaphylaxis. This study aimed to estimate the risk of hypersensitivity reactions to BVA and to determine their clinical features. Methods We retrospectively surveyed the medical records of patients treated by BVA between January 2010 and April 2019 in Dunsan Hospital of Daejeon University, and all cases of allergic reactions and their clinical symptoms were analyzed. Results A total of 8,580 patients (males 4,081 and females 4,499) were treated with BVA which amounts to a total of 60,654 treatments (average 7.1 ± 14.8 times). A total of fifteen patients (7 males and 8 females) reported an allergic reaction (0.175%, 95% CI, 0.086–0.263) of type 1 hypersensitivity, indicating a rate of allergic reaction in 0.025% (95% CI, 0.012–0.037) of the total BVA treatments. The average number of BVA treatments in those patients was 6.9 ± 6.5 (males: 4.1 ± 3.4 and females: 9.3 ± 7.9). Among the cases of hypersensitivity reactions, 4 involved anaphylactic shock; therefore, the incidence rate of anaphylaxis was 0.047% (95% CI, 0.001–0.092) for the 8,580 subjects and 0.007% (95% CI, 0.000–0.013) for the 60,654 treatments. All grade 1 cases were recovered within 1 day, whereas others took up to 30 days for complete recovery. Conclusion Our results may emphasize paying attention to unforeseeable risks of anaphylaxis after bee-venom acupuncture. This study could be essential reference data for the guidelines of appropriate use of bee-venom acupuncture and bee-venom-derived interventions in clinical applications.
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Affiliation(s)
- Eun-Jung Lee
- Department of Korean Rehabilitation Medicine, College of Korean Medicine, Daejeon University, Daejeon, South Korea
| | - Yo-Chan Ahn
- Department of Health Service Management, Daejeon University, Daejeon, South Korea
| | - Young-Il Kim
- Department of Acupuncture and Moxibustion Medicine, College of Korean Medicine, Daejeon University, Daejeon, South Korea
| | - Min-Seok Oh
- Department of Korean Rehabilitation Medicine, College of Korean Medicine, Daejeon University, Daejeon, South Korea
| | - Yang-Chun Park
- Division of Respiratory System, Department of Internal Medicine, College of Korean Medicine, Daejeon University, Daejeon, South Korea
| | - Chang-Gue Son
- Department of Gastrobilliary System, Dunsan Hospital of Daejeon University, Daejeon, South Korea
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13
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Ryu B, Baek J, Kim H, Lee JH, Kim J, Jeong YH, Lee SG, Kang KR, Oh MS, Kim EY, Kim CY, Chung HM. Anti-Inflammatory Effects of M-MSCs in DNCB-Induced Atopic Dermatitis Mice. Biomedicines 2020; 8:biomedicines8100439. [PMID: 33096640 PMCID: PMC7589030 DOI: 10.3390/biomedicines8100439] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 10/12/2020] [Accepted: 10/20/2020] [Indexed: 01/03/2023] Open
Abstract
Atopic dermatitis (AD) is an inflammatory skin disease caused by an imbalance between Th1 and Th2 cells. AD patients suffer from pruritus, excessive dryness, red or inflamed skin, and complications such as sleep disturbances and depression. Although there are currently many AD treatments available there are insufficient data on their long-term stability and comparative effects. Moreover, they have limitations due to various side effects. Multipotent mesenchymal stem cells (M-MSCs) might have potential for next-generation AD therapies. MSCs are capable of immune function regulation and local inflammatory response inhibition. M-MSCs, derived from human embryonic stem cells (hESC), additionally have a stable supply. In L507 antibody array, M-MSCs generally showed similar tendencies to bone marrow-derived mesenchymal stem cells (BM-MSCs), although the immunoregulatory function of M-MSCs seemed to be superior to BM-MSCs. Based on the characteristics of M-MSCs on immunoregulatory functions, we tested a M-MSC conditioned media concentrate (MCMC) in mice with AD lesions on their dorsal skin. MCMC significantly decreased RNA expression levels of inflammatory cytokines in the mouse dorsal skin. It also suppressed serum IgE levels. In addition, significant histopathologic alleviation was identified. In conclusion, secretions of M-MSCs have the potential to effectively improve AD-related inflammatory lesions. M-MSCs showed potential for use in next-generation AD treatment.
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Affiliation(s)
- Bokyeong Ryu
- Department of Laboratory Animal Medicine, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea; (B.R.); (J.K.)
| | - Jieun Baek
- Department of Stem Cell Biology, School of Medicine, Konkuk University, Seoul 05029, Korea; (J.B.); (H.K.); (J.-H.L.); (Y.-H.J.); (S.-G.L.); (K.-R.K.); (M.-S.O.)
| | - Hana Kim
- Department of Stem Cell Biology, School of Medicine, Konkuk University, Seoul 05029, Korea; (J.B.); (H.K.); (J.-H.L.); (Y.-H.J.); (S.-G.L.); (K.-R.K.); (M.-S.O.)
| | - Ji-Heon Lee
- Department of Stem Cell Biology, School of Medicine, Konkuk University, Seoul 05029, Korea; (J.B.); (H.K.); (J.-H.L.); (Y.-H.J.); (S.-G.L.); (K.-R.K.); (M.-S.O.)
| | - Jin Kim
- Department of Laboratory Animal Medicine, College of Veterinary Medicine, Seoul National University, Seoul 08826, Korea; (B.R.); (J.K.)
| | - Young-Hoon Jeong
- Department of Stem Cell Biology, School of Medicine, Konkuk University, Seoul 05029, Korea; (J.B.); (H.K.); (J.-H.L.); (Y.-H.J.); (S.-G.L.); (K.-R.K.); (M.-S.O.)
| | - Seul-Gi Lee
- Department of Stem Cell Biology, School of Medicine, Konkuk University, Seoul 05029, Korea; (J.B.); (H.K.); (J.-H.L.); (Y.-H.J.); (S.-G.L.); (K.-R.K.); (M.-S.O.)
| | - Kyu-Ree Kang
- Department of Stem Cell Biology, School of Medicine, Konkuk University, Seoul 05029, Korea; (J.B.); (H.K.); (J.-H.L.); (Y.-H.J.); (S.-G.L.); (K.-R.K.); (M.-S.O.)
| | - Min-Seok Oh
- Department of Stem Cell Biology, School of Medicine, Konkuk University, Seoul 05029, Korea; (J.B.); (H.K.); (J.-H.L.); (Y.-H.J.); (S.-G.L.); (K.-R.K.); (M.-S.O.)
- Advanced Analysis Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
| | | | - C-Yoon Kim
- Department of Stem Cell Biology, School of Medicine, Konkuk University, Seoul 05029, Korea; (J.B.); (H.K.); (J.-H.L.); (Y.-H.J.); (S.-G.L.); (K.-R.K.); (M.-S.O.)
- Correspondence: (C.-Y.K.); (H.M.C.); Tel.: +82-10-9140-0136; Fax: +82-2-455-9012
| | - Hyung Min Chung
- Department of Stem Cell Biology, School of Medicine, Konkuk University, Seoul 05029, Korea; (J.B.); (H.K.); (J.-H.L.); (Y.-H.J.); (S.-G.L.); (K.-R.K.); (M.-S.O.)
- Mireacellbio Co., Ltd., Seoul 04795, Korea;
- Correspondence: (C.-Y.K.); (H.M.C.); Tel.: +82-10-9140-0136; Fax: +82-2-455-9012
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Ko Y, Jang BH, Oh MS, Kim SJ, Ko YS, Ha IH, Lee EJ, Kim MR, Song YK, Ko SG. Evaluation of efficacy and safety of single and multiple therapy of herbal medicine/Chuna therapy on non-specific chronic low back pain: A study protocol for multicenter, 3-arm, randomized, single blinded, parallel group, incomplete factorial design, pilot study. Medicine (Baltimore) 2020; 99:e21260. [PMID: 32791704 PMCID: PMC7387040 DOI: 10.1097/md.0000000000021260] [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] [Indexed: 11/26/2022] Open
Abstract
INTRODUCTION Chronic non-specific low back pain is one of the common health issues which reduce the quality of life and in working population. While combined therapeutic treatment method is widely used for musculoskeletal related disorders in Korea, well-developed trials on the efficacy of single or combine therapy on herbal medicine and Chuna manual therapy (CMT) are scarce. OBJECTIVE This study aims to evaluate the clinical efficacy and safety of herbal medicine, Sogyeonghwalhyeol-tang (SGHH) on work related chronic low back pain patients. The primary aim is to determine the efficacy of a combined multidisciplinary approach using SGHH with CMT compared to SGHH alone. The secondary aim is to examine the naïve direct comparison between SGHH and placebo. METHOD This trial is designed as a multicenter, randomized, controlled, clinical trial. A total of 150 participants who have with chief complaint of low back pain in Korean medicine rehabilitation center will be randomly assigned to 1 of 3 treatments with a ratio of 1:1:1. Eligible participant will be randomized to treatment arm A receive single treatment of Sogyeonghwalhyeol-tang, in treatment Arm B Sogyeonghwalhyeol-tang and Chuna manual therapy are administered concurrently, in treatment arm C, where individuals receive placebo with Chuna manual therapy. They will receive assigned treatment in 4 weeks and follow-up for 4 weeks. The primary endpoint is to assess the change in severity of low back pain from baseline. The secondary endpoints are the following: the changes in disability and health related quality of life. Adverse events will also be reported. DISCUSSION The study result will provide the valuable information for efficacy and safety of monotherapy and multiple therapy of herbal medicinal extract and Chuna manual therapy on chronic non-specific low back pain. TRIAL REGISTRATION ClinicalTrials.gov Identifier: NCT03132974.
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Affiliation(s)
- Youme Ko
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul
| | - Bo-Hyoung Jang
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul
| | - Min-Seok Oh
- Department of Korean Rehabilitation Medicine, College of Korean Medicine, Dae-Jeon University, Daejeon
| | - Sun Joong Kim
- Department of Korean Rehabilitation Medicine, College of Korean Medicine, Semyung University, Jecheon
| | - Yeon-seok Ko
- Department of Korean Rehabilitation Medicine, College of Korean Medicine, Woosuk University, Jecheon
| | - In-Hyuk Ha
- Jaseng Spine and Joint Research Institute, Jaseng Medical Foundation, Seoul
| | - Eun Jung Lee
- Department of Korean Rehabilitation Medicine, College of Korean Medicine, Dae-Jeon University, Daejeon
| | | | - Yun-Kyung Song
- Department of Korean Rehabilitation Medicine, College of Korean Medicine, Gachon University, Seongnam-si, Republic of Korea
| | - Seong-Gyu Ko
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul
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Ko Y, Jang BH, Oh MS, Shin BC, Kim SJ, Cha YY, Ko YS, Hwang EH, Lee EJ, Jung JY, Song YK, Ko SG. Korean medicine registry for low back pain - A study protocol for prospective observational multi-center study (KLOS). Integr Med Res 2020; 9:100448. [PMID: 32695577 PMCID: PMC7360851 DOI: 10.1016/j.imr.2020.100448] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Revised: 06/01/2020] [Accepted: 06/02/2020] [Indexed: 10/31/2022] Open
Abstract
Background Low back pain (LBP) is a major burden in Korea. Despite its high prevalence, the government and the public health sector do not address the specific evidences of symptom control and prevention of LBP to reduce long-term healthcare costs and increase the quality of life. Thus, the Korean medicine sector encourages to collection and analysis of the medical utilization pattern of patients with LBP in Korea to provide evidences of LBP control strategy as well as political decisions. Methods KLOS, a prospective, multi-center, patient registry pilot study will collaborate with 7 traditional Korean medicine hospitals and recruit patients with LBP into the registry. A total of 150 eligible patients with new episodes of LBP, who visit a Korean hospital without any other treatment history, will be enrolled in the registry. After enrollment, we will collect the individual characteristics of each patient, such as pain intensity, LBP-related daily disability, anthropometrics, and Health-Related Quality of Life (HRQoL) at baseline and FU1 and FU2. We will also access the patients' clinical and administrative electronic records to analyze the pattern of patients' resource utilization. Overall, the aims of KLOS are to (1) explore the general characteristics of patients with new episodes of LBP and (2) evaluate the efficacy and safety of various Korean medicine treatments for LBP, based on nationwide registry outcome collecting process. Discussion The first pilot study of prospective, multi-center registry of newly diagnosed LBP patients in traditional Korean medicine hospitals. The result of this study may show the current status of LBP patients who receive Korean medicine treatments and provide evidences for reasonable decision-making on Korean medicine healthcare policy in the future. Trial registration number ClinicalTrials.gov Identifier: NCT02418286.
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Affiliation(s)
- Youme Ko
- Department of Korean Preventive Medicine, Graduate School, Kyung Hee University, Seoul, Republic of Korea
| | - Bo-Hyoung Jang
- Department of Korean Preventive Medicine, Graduate School, Kyung Hee University, Seoul, Republic of Korea
| | - Min-Seok Oh
- Department of Korean Rehabilitation Medicine, College of Korean Medicine, Daejeon University, Daejeon, Republic of Korea
| | - Byung-Cheul Shin
- Department of Korean Rehabilitation Medicine, School of Korean Medicine, Pusan National University, Yangsan, Republic of Korea
| | - Sun Joong Kim
- Department of Korean Rehabilitation Medicine, College of Korean Medicine, Semyung University, Jecheon, Republic of Korea
| | - Yun-Yeop Cha
- Department of Korean Rehabilitation Medicine, College of Korean Medicine, Sangji University, Wonju, Republic of Korea
| | - Youn Seok Ko
- Department of Korean Rehabilitation Medicine, College of Korean Medicine, Woosuk University, Wanju, Republic of Korea
| | - Eui-Hyoung Hwang
- Department of Korean Rehabilitation Medicine, School of Korean Medicine, Pusan National University, Yangsan, Republic of Korea
| | - Eun Jung Lee
- Department of Korean Rehabilitation Medicine, College of Korean Medicine, Daejeon University, Daejeon, Republic of Korea
| | - Jae Young Jung
- Department of Korean Rehabilitation Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Yun-Kyung Song
- Department of Korean Rehabilitation Medicine, College of Korean Medicine, Gachon University, Seongnam, Republic of Korea
| | - Seong-Gyu Ko
- Department of Korean Preventive Medicine, Graduate School, Kyung Hee University, Seoul, Republic of Korea
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Abstract
BACKGROUND Thoracotomy is a common surgical procedure used in cases such as trauma and cancer resection. It is an invasive procedure in which incisions are made in the chest wall to gain access to the chest. Therefore, it often produces intense postoperative pain. Electroacupuncture has been known for its analgesic effects in various conditions, including cases of postoperative pain. This protocol design is for a systematic review and meta-analysis to gather evidence and investigate the analgesic effects of electroacupuncture in pain after thoracotomy. METHODS The studies for the systematic review will be searched with keywords on the following 10 databases: PubMed, Cochrane Library (CENTRAL), EMBASE, MEDLINE, Google Scholar, CNKI, KoreaMed, KMBASE, KISS, and OASIS. The search will be done without language restrictions. Only the randomized controlled trials that meet the eligibility criteria will be finally included in the study. The quality of the study will be assessed using the Cochrane Collaborations' risk-of-bias tool, and Cochrane's software RevMan 5.3 will be used for meta-analysis. RESULTS The designed study will provide a systematic review and meta-analysis of the searched and randomized controlled trials that meet the eligibility criteria. Meta-analysis will be performed with pain scores as the main outcome measure, and they may also be performed with additional outcomes. The qualitative and quantitative data synthesis is expected to provide high quality evidence to judge the pain management effect of electroacupuncture for patients who underwent thoracotomy. CONCLUSION The conclusion of this systematic review and meta-analysis will provide evidence to judge whether electroacupuncture is an effective analgesic treatment option for patients suffering with post-thoracotomy pain. PROSPERO REGISTRATION NUMBER CRD42019142157.
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Affiliation(s)
| | - Ji-Hyang Gu
- Department of Korean Rehabilitation Medicine, College of Korean Medicine, Daejeon University, Dong-Gu
| | - Hye-Kyoung Jang
- Clinical Trial Center, Dunsan Korean Medicine Hospital of Daejeon University, Seo-Gu Daejeon
| | - Min-Seok Oh
- Department of Korean Rehabilitation Medicine, College of Korean Medicine, Daejeon University, Dong-Gu
| | - Eun-Jung Lee
- Department of Korean Rehabilitation Medicine, College of Korean Medicine, Daejeon University, Dong-Gu
| | - In Chul Jung
- Department of Oriental Neuropsychiatry, College of Korean Medicine, Daejeon University, Dong-Gu, Daejeon, Republic of Korea
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17
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Kim JT, Cho BH, Choi KH, Park MS, Kim BJ, Park JM, Kang K, Lee SJ, Kim JG, Cha JK, Kim DH, Nah HW, Park TH, Park SS, Lee KB, Lee J, Hong KS, Cho YJ, Park HK, Lee BC, Yu KH, Oh MS, Kim DE, Ryu WS, Choi JC, Kwon JH, Kim WJ, Shin DI, Sohn SI, Hong JH, Lee JS, Lee J, Bae HJ, Saver JL, Cho KH. Association between time to treatment and functional outcomes according to the Diffusion-Weighted Imaging Alberta Stroke Program Early Computed Tomography Score in endovascular stroke therapy. Eur J Neurol 2019; 27:343-351. [PMID: 31535427 DOI: 10.1111/ene.14083] [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: 03/03/2019] [Accepted: 09/03/2019] [Indexed: 12/01/2022]
Abstract
BACKGROUND AND PURPOSE The rate at which the chance of a good outcome of endovascular stroke therapy (EVT) decays with time when eligible patients are selected by baseline diffusion-weighted magnetic resonance imaging (DWI-MRI) and whether ischaemic core size affects this rate remain to be investigated. METHODS This study analyses a prospective multicentre registry of stroke patients treated with EVT based on pretreatment DWI-MRI that was categorized into three groups: small [Diffusion-Weighted Imaging Alberta Stroke Program Early Computed Tomography Score (DWI-ASPECTS)] (8-10), moderate (5-7) and large (<5) cores. The main outcome was a good outcome at 90 days (modified Rankin Scale 0-2). The interaction between onset-to-groin puncture time (OTP) and DWI-ASPECTS categories regarding functional outcomes was investigated. RESULTS Ultimately, 985 patients (age 69 ± 11 years; male 55%) were analysed. Potential interaction effects between the DWI-ASPECTS categories and OTP on a good outcome at 90 days were observed (Pinteraction = 0.06). Every 60-min delay in OTP was associated with a 16% reduced likelihood of a good outcome at 90 days amongst patients with large cores, although no associations were observed amongst patients with small to moderate cores. Interestingly, the adjusted rates of a good outcome at 90 days steeply declined between 65 and 213 min of OTP and then remained smooth throughout 24 h of OTP (Pnonlinearity = 0.15). CONCLUSIONS Our study showed that the probability of a good outcome after EVT nonlinearly decreased, with a steeper decline at earlier OTP than at later OTP. Discrepant effects of OTP on functional outcomes by baseline DWI-ASPECTS categories were observed. Thus, different strategies for EVT based on time and ischaemic core size are warranted.
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Affiliation(s)
- J-T Kim
- Department of Neurology, Chonnam National University Hospital, Gwangju, Korea
| | - B-H Cho
- Department of Neurology, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea
| | - K-H Choi
- Department of Neurology, Chonnam National University Hospital, Gwangju, Korea
| | - M-S Park
- Department of Neurology, Chonnam National University Hospital, Gwangju, Korea
| | - B J Kim
- Department of Neurology, Cerebrovascular Center, Seoul National University Bundang Hospital, Seongnam, Korea
| | - J-M Park
- Department of Neurology, Nowon Eulji Medical Center, Eulji University, Seoul, Korea
| | - K Kang
- Department of Neurology, Nowon Eulji Medical Center, Eulji University, Seoul, Korea
| | - S J Lee
- Department of Neurology, Eulji University Hospital, Eulji University, Daejeon, Korea
| | - J G Kim
- Department of Neurology, Eulji University Hospital, Eulji University, Daejeon, Korea
| | - J-K Cha
- Department of Neurology, Dong-A University Hospital, Busan, Korea
| | - D-H Kim
- Department of Neurology, Dong-A University Hospital, Busan, Korea
| | - H-W Nah
- Department of Neurology, Dong-A University Hospital, Busan, Korea
| | - T H Park
- Department of Neurology, Seoul Medical Center, Seoul, Korea
| | - S-S Park
- Department of Neurology, Seoul Medical Center, Seoul, Korea
| | - K B Lee
- Department of Neurology, Soonchunhyang University Hospital, Seoul, Korea
| | - J Lee
- Department of Neurology, Yeungnam University Hospital, Daegu, Korea
| | - K-S Hong
- Department of Neurology, Ilsan Paik Hospital, Inje University, Goyang, Korea
| | - Y-J Cho
- Department of Neurology, Ilsan Paik Hospital, Inje University, Goyang, Korea
| | - H-K Park
- Department of Neurology, Ilsan Paik Hospital, Inje University, Goyang, Korea
| | - B-C Lee
- Department of Neurology, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - K-H Yu
- Department of Neurology, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - M S Oh
- Department of Neurology, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - D-E Kim
- Department of Neurology, Dongguk University Ilsan Hospital, Goyang, Korea
| | - W-S Ryu
- Department of Neurology, Dongguk University Ilsan Hospital, Goyang, Korea
| | - J C Choi
- Department of Neurology, Jeju National University Hospital, Jeju National University School of Medicine, Jeju, Korea
| | - J-H Kwon
- Department of Neurology, Ulsan University College of Medicine, Ulsan, Korea
| | - W-J Kim
- Department of Neurology, Ulsan University College of Medicine, Ulsan, Korea
| | - D-I Shin
- Department of Neurology, Chungbuk National University Hospital, Cheongju, Korea
| | - S I Sohn
- Department of Neurology, Keimyung University Dongsan Medical Center, Daegu, Korea
| | - J-H Hong
- Department of Neurology, Keimyung University Dongsan Medical Center, Daegu, Korea
| | - J S Lee
- Department of Neurology, Clinical Research Center, Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - J Lee
- Department of Neurology, Department of Biostatistics, Korea University College of Medicine, Seoul, Korea
| | - H-J Bae
- Department of Neurology, Cerebrovascular Center, Seoul National University Bundang Hospital, Seongnam, Korea
| | - J L Saver
- Department of Neurology, Department of Neurology and Comprehensive Stroke Center, David Geffen School of Medicine at the University of California Los Angeles, Los Angeles, CA, USA
| | - K-H Cho
- Department of Neurology, Chonnam National University Hospital, Gwangju, Korea
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Ko Y, Jang BH, Oh MS, Kim SJ, Cha YY, Lee EJ, Song YK, Ko SG. Evaluation of the efficacy and safety of herbal medicine for treating work-related chronic low back pain: A study protocol for a multicenter, randomized, controlled, clinical trial. Medicine (Baltimore) 2019; 98:e16466. [PMID: 31348248 PMCID: PMC6708960 DOI: 10.1097/md.0000000000016466] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 06/20/2019] [Accepted: 06/21/2019] [Indexed: 11/26/2022] Open
Abstract
INTRODUCTION In Korea, low back pain (LBP) which is occupation-related symptom is one of the major health issues owing to rapid industrialization. Even traditional Korean medicine has the long history in pain treatment, there still has been lack of supporting evidence on herbal prescription itself. Sogyeonghwalhyeol-tang, a Korean herbal medicine prescription, has been suggested as a medication for treating chronic LBP as well as work-related pains. OBJECTIVE This study aims to evaluate the clinical efficacy and safety of herbal medicine, Sogyeonghwalhyeol-tang on work-related chronic LBP patients. METHOD This trial is designed as a multicenter, randomized, controlled, clinical trial. Seventy-two participants who have chief complaint of LBP in Korean medicine rehabilitation center will be randomly assigned to ether Sogyeonghwalhyeol-tang group or placebo group with a ratio of 1:1. They will receive assigned drugs in 4 weeks and follow-up for 2 weeks. DISCUSSION The result of this study will provide the valuable information for efficacy and safety of Sogyeonghwalhyeol-tang for patients with work-related chronic LBP.
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Affiliation(s)
- Youme Ko
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University
| | - Bo-Hyoung Jang
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University
| | - Min-Seok Oh
- Department of Korean Rehabilitation Medicine, College of Korean Medicine, Dae-Jeon University, Daejeon
| | - Sun Joong Kim
- Department of Korean Rehabilitation Medicine, College of Korean Medicine, Semyung University, Jecheon
| | - Yun-Yeop Cha
- Department of Korean Rehabilitation Medicine, College of Korean Medicine, Sang-ji University, Wonju
| | - Eun Jung Lee
- Department of Korean Rehabilitation Medicine, College of Korean Medicine, Dae-Jeon University, Daejeon
| | - Yun-Kyung Song
- Department of Korean Rehabilitation Medicine, College of Korean Medicine, Gachon University, Seongnam-si, The Republic of Korea
| | - Seung-Gyu Ko
- Department of Science in Korean Medicine, Graduate School, Kyung Hee University
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Lee JE, Shah VK, Lee EJ, Oh MS, Choi JJ. Melittin - A bee venom component - Enhances muscle regeneration factors expression in a mouse model of skeletal muscle contusion. J Pharmacol Sci 2019; 140:26-32. [PMID: 31113730 DOI: 10.1016/j.jphs.2019.03.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 08/20/2018] [Revised: 03/25/2019] [Accepted: 03/27/2019] [Indexed: 12/17/2022] Open
Abstract
Melittin is a major peptide component of sweet bee venom that possesses anti-allergic, anti-inflammatory, anti-arthritis, anti-cancer, and neuroprotective properties. However, the therapeutic effects of melittin on muscle injury have not been elucidated. We investigated the therapeutic effects of melittin on muscle injury in a mouse model of muscle contusion. The biceps femoris muscle of the mice was injured using drop mass method, and the animals were treated with melittin (4, 20, or 100 μg/kg) for 7 days. Melittin significantly increased: locomotor activity in open field test, and treadmill running activity in a dose-dependent manner to level comparable to the positive control, diclofenac (30 mg/kg). Melittin treatment attenuated the pro-inflammatory cytokine MCP-1, TNF-α and IL-6. The expression of muscle regeneration biomarkers, including MyoD (muscle differentiation marker), myogenin, smooth muscle actin, and myosin heavy chain was markedly increased in the injured muscle tissue of melittin-treated mice, as determined by western blotting and quantitative real-time polymerase chain reaction. These results demonstrate that melittin inhibits inflammatory response and improves muscle damage by regenerating muscles in a mouse model of muscle contusion. Taken together, the results of present study suggest that melittin is a promising candidate for the muscle injury treatment.
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Affiliation(s)
- Jae Eun Lee
- Department of Korean Rehabilitation Medicine, Cheonan Korean Medicine Hospital of Daejeon University, Cheonan, 31099, Republic of Korea
| | - Vikash Kumar Shah
- Laboratory of Molecular Medicine, College of Korean Medicine, Daejeon University, Daejeon, 34520, Republic of Korea
| | - Eun-Jung Lee
- Department of Korean Rehabilitation Medicine, College of Korean Medicine, Daejeon University, Daejeon, 34520, Republic of Korea
| | - Min-Seok Oh
- Department of Korean Rehabilitation Medicine, College of Korean Medicine, Daejeon University, Daejeon, 34520, Republic of Korea.
| | - Jeong June Choi
- Laboratory of Molecular Medicine, College of Korean Medicine, Daejeon University, Daejeon, 34520, Republic of Korea.
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Lee GH, Oh MS, Park MH, Shin YG, Song JH, Yu BY. Study of Ultra-Sensitive AMS Method to Identify Drug-Drug Interactions between Ciprofloxacin and Microdose 14
C-Caffeine. B KOREAN CHEM SOC 2018. [DOI: 10.1002/bkcs.11468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Gwan-Ho Lee
- Advanced Analysis Center; Korea Institute of Science and Technology; Seoul 02792 Republic of Korea
| | - Min-Seok Oh
- Department of Stem Cell Biology; Konkuk University, School of Medicine; Seoul 05029 Republic of Korea
| | - Min-Ho Park
- College of Pharmacy; Chungnam National University; Daejeon 34134 Republic of Korea
| | - Young G. Shin
- College of Pharmacy; Chungnam National University; Daejeon 34134 Republic of Korea
| | - Jong Han Song
- Advanced Analysis Center; Korea Institute of Science and Technology; Seoul 02792 Republic of Korea
| | - Byung-Yong Yu
- Advanced Analysis Center; Korea Institute of Science and Technology; Seoul 02792 Republic of Korea
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Kim YS, Kim MN, Lee KE, Hong JY, Oh MS, Kim SY, Kim KW, Sohn MH. Activated leucocyte cell adhesion molecule (ALCAM/CD166) regulates T cell responses in a murine model of food allergy. Clin Exp Immunol 2018; 192:151-164. [PMID: 29363753 DOI: 10.1111/cei.13104] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/09/2018] [Indexed: 12/14/2022] Open
Abstract
Food allergy is a major public health problem. Studies have shown that long-term interactions between activated leucocyte cell adhesion molecule (ALCAM/CD166) on the surface of antigen-presenting cells, and CD6, a co-stimulatory molecule, influence immune responses. However, there are currently no studies on the functions of ALCAM in food allergy. Therefore, we aimed to identify the functions of ALCAM in ovalbumin (OVA)-induced food allergy using ALCAM-deficient mice. Wild-type (WT) and ALCAM-deficient (ALCAM-/- ) mice were sensitized intraperitoneally and with orally fed OVA. The mice were killed, and parameters related to food allergy and T helper type 2 (Th2) immune responses were analysed. ALCAM serum levels increased and mRNA expression decreased in OVA-challenged WT mice. Serum immunoglobulin (Ig)E levels, Th2 cytokine mRNA and histological injuries were higher in OVA-challenged WT mice than in control mice, and these were attenuated in ALCAM-/- mice. T cell proliferation of total cells, CD3+ CD4+ T cells and activated T cells in immune tissues were diminished in OVA-challenged ALCAM-/- mice. Proliferation of co-cultured T cells and dendritic cells (DCs) was decreased by the anti-CD6 antibody. In addition, WT mice sensitized by adoptive transfer of OVA-pulsed ALCAM-/- BM-derived DCs showed reduced immune responses. Lastly, serum ALCAM levels were higher in children with food allergy than in control subjects. In this study, serum levels of ALCAM were elevated in food allergy-induced WT mice and children with food allergy. Moreover, immune responses and T cell activation were attenuated in OVA-challenged ALCAM-/- mice. These results indicate that ALCAM regulates food allergy by affecting T cell activation.
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Affiliation(s)
- Y S Kim
- Department of Pediatrics, Severance Hospital, Institute of Allergy, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - M N Kim
- Department of Pediatrics, Severance Hospital, Institute of Allergy, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - K E Lee
- Department of Pediatrics, Severance Hospital, Institute of Allergy, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - J Y Hong
- Department of Pediatrics, Severance Hospital, Institute of Allergy, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - M S Oh
- Department of Pediatrics, Severance Hospital, Institute of Allergy, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - S Y Kim
- Department of Pediatrics, Severance Hospital, Institute of Allergy, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - K W Kim
- Department of Pediatrics, Severance Hospital, Institute of Allergy, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - M H Sohn
- Department of Pediatrics, Severance Hospital, Institute of Allergy, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
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Sol IS, Kim YH, Park YA, Lee KE, Hong JY, Kim MN, Kim YS, Oh MS, Yoon SH, Kim MJ, Kim KW, Sohn MH, Kim KE. Relationship between sputum clusterin levels and childhood asthma. Clin Exp Allergy 2017; 46:688-95. [PMID: 26661728 DOI: 10.1111/cea.12686] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [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: 04/06/2015] [Revised: 11/27/2015] [Accepted: 12/05/2015] [Indexed: 12/25/2022]
Abstract
BACKGROUND Clusterin is a sensitive cellular biosensor of oxidative stress and has been studied as a biomarker for inflammation-associated diseases. Clusterin levels in childhood asthma have not been evaluated. OBJECTIVES (1) To evaluate sputum clusterin levels in children with asthma compared to a control group. (2) To assess the relationships between sputum clusterin levels and airway inflammation, pulmonary function, and bronchial hyperresponsiveness. METHODS This study included 170 children aged 5-18 years with stable asthma (n = 91), asthma exacerbation (n = 29), or no asthma (healthy controls; n = 50). Induced sputum, pulmonary function, and methacholine challenge tests were performed. Stable asthma was classified into two groups according to the severity. Clusterin levels in sputum were measured using an enzyme-linked immunosorbent assay. RESULTS Children with stable asthma had a higher clusterin level than healthy controls [4540 (3872-5651) pg/mL vs. 3857 (1054-4369) pg/mL, P < 0.001]. The clusterin level was also more elevated in eosinophil-dominant sputum than in non-eosinophilic sputum in stable asthma [5094 (4243-6257) pg/mL vs. 4110 (1871-4839) pg/mL, P = 0.0017]. Clusterin levels were associated with asthma severity. Paradoxically, clusterin levels were lower during asthma exacerbation than in stable asthma [1838 (350-4790] pg/mL vs. 4540 (3872-5651) pg/mL, P < 0.001]. Clusterin levels were strongly correlated with the methacholine concentration that caused a 20% decrease in the forced expiratory volume in 1 s (r = -0.617, P < 0.001); there was no significant correlation between clusterin levels and other pulmonary function parameters. CONCLUSIONS AND CLINICAL RELEVANCE Clusterin levels were altered in children with stable asthma and asthma exacerbation because of its antioxidant and anti-inflammatory effects. Clusterin may be a marker that reflects airway inflammation and severity of symptoms, and it can be used in the assessment and management of childhood asthma.
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Affiliation(s)
- I S Sol
- Department of Pediatrics, Severance Hospital, Institute of Allergy, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - Y H Kim
- Department of Pediatrics, Severance Hospital, Institute of Allergy, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - Y A Park
- Department of Pediatrics, Severance Hospital, Institute of Allergy, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - K E Lee
- Department of Pediatrics, Severance Hospital, Institute of Allergy, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - J Y Hong
- Department of Pediatrics, Severance Hospital, Institute of Allergy, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - M N Kim
- Department of Pediatrics, Severance Hospital, Institute of Allergy, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - Y S Kim
- Department of Pediatrics, Severance Hospital, Institute of Allergy, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - M S Oh
- Department of Pediatrics, Severance Hospital, Institute of Allergy, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - S H Yoon
- Department of Pediatrics, Severance Hospital, Institute of Allergy, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - M J Kim
- Department of Pediatrics, Severance Hospital, Institute of Allergy, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - K W Kim
- Department of Pediatrics, Severance Hospital, Institute of Allergy, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - M H Sohn
- Department of Pediatrics, Severance Hospital, Institute of Allergy, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - K E Kim
- Department of Pediatrics, Severance Hospital, Institute of Allergy, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
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Jeong B, Oh MS, Park HM, Park C, Kim EJ, Hong SW. Elimination of microcystin-LR and residual Mn species using permanganate and powdered activated carbon: Oxidation products and pathways. Water Res 2017; 114:189-199. [PMID: 28249210 DOI: 10.1016/j.watres.2017.02.043] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [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: 11/09/2016] [Revised: 02/15/2017] [Accepted: 02/19/2017] [Indexed: 06/06/2023]
Abstract
The oxidation of microcystin-LR (MC-LR) in deionized water (DI) and river water using potassium permanganate (KMnO4) at a neutral pH and at 23 ± 2 °C was investigated. These two aqueous systems (i.e., DI and river water) gave comparable second-order rate constants (289.9 and 285.5 M-1s-1 (r2 > 0.99), respectively), which confirmed the effectiveness of this oxidation process for the treatment of natural surface water. The presence of either humic or fulvic acid reduced the removal efficiency of MC-LR, with the latter exhibiting a greater inhibitory effect. Monitoring of MC-LR and residual Mn2+ levels with adding KMnO4 (1 mg/L) and powdered activated carbon (PAC, 5-20 mg L-1) before and during coagulation, respectively, revealed that 60 min of permanganate pre-oxidation followed by coagulant addition with PAC was the most effective approach for reducing both levels below limits stated by WHO guidelines. The MC-LR degradation products were the result of oxidation occurring at the diene and aromatic moieties of the Adda (3-amino-9-methoxy-2,6,8-trimethyl-10-phenyldeca-4,6-dienoic acid) side-chain, in addition to amine bond hydrolysis of the Mdha (N-methyldehydroalanine) moiety. Several toxic by-products with an intact Adda chain were observed during the reaction, but completely disappeared after 60 min. This further supports the conclusion that sufficient contact time with permanganate (i.e., >60 min) is essential to reducing the residual toxicity and maximizing the efficiency of MC-LR oxidation when treating raw water.
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Affiliation(s)
- Boyoung Jeong
- Center for Water Resources Cycle Research, Korea Institute of Science and Technology (KIST), Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea
| | - Min-Seok Oh
- Advanced Analysis Center, Korea Institute of Science and Technology (KIST), Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea
| | - Hyun-Mee Park
- Advanced Analysis Center, Korea Institute of Science and Technology (KIST), Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea
| | - Chanhyuk Park
- Center for Water Resources Cycle Research, Korea Institute of Science and Technology (KIST), Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea
| | - Eun-Ju Kim
- Center for Water Resources Cycle Research, Korea Institute of Science and Technology (KIST), Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea; Energy and Environmental Engineering, Korea University of Science and Technology, Seoul, 02792, Republic of Korea.
| | - Seok Won Hong
- Center for Water Resources Cycle Research, Korea Institute of Science and Technology (KIST), Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 02792, Republic of Korea; Energy and Environmental Engineering, Korea University of Science and Technology, Seoul, 02792, Republic of Korea.
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24
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Choi JO, Choi JO, Oh MS, Lee GY, Kang SM, Kim JJ, Cho HJ, Jeon ES. Heart Transplantation in Korea: 20 Years of Experience. J Card Fail 2016. [DOI: 10.1016/j.cardfail.2016.07.295] [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] [Indexed: 10/21/2022]
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25
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Son PS, Oh MS, Ye JH, Choi SH. Counter anion effects in anion exchange membrane-fabricated non-aqueous vanadium redox flow battery. Analytical Science and Technology 2015. [DOI: 10.5806/ast.2015.28.5.341] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Lee KJ, Lee GH, Kim H, Oh MS, Chu S, Hwang IJ, Lee JY, Choi A, Kim CI, Park HM. Determination of Heterocyclic Amines and Acrylamide in Agricultural Products with Liquid Chromatography-Tandem Mass Spectrometry. Toxicol Res 2015; 31:255-64. [PMID: 26483884 PMCID: PMC4609972 DOI: 10.5487/tr.2015.31.3.255] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [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: 08/17/2015] [Revised: 09/10/2015] [Accepted: 09/17/2015] [Indexed: 11/20/2022] Open
Abstract
Heterocyclic amines (HCAs) and acrylamide are unintended hazardous substances generated by heating or processing of foods and are known as carcinogenic and mutagenic agents by the animal experiments. A simple method was established for a rapid and accurate determination of 12 types of HCAs (IQ, MeIQ, Glu-P-1, Glu-P-2, MeIQx, Trp-P-1, Trp-P-2, PhIP, AαC, MeAαC, Harman and Norharman) and acrylamide in three food matrices (non-fat liquid, non-fat solid and fat solid) by isotope dilution liquid chromatography-tandem mass spectrometry (LC-MS/MS). In every sample, a mixture of internal standards including IQ-d3, MeIQx-d3, PhIP-d3, Trp-P-2-(13)C2-(15)N and MeAαC-d3 was spiked for quantification of HCAs and (13)C3-acrylamide was also spiked for the analysis of acrylamide. HCAs and acrylamide in sample were extracted with acetonitrile and water, respectively, and then two solid-phase extraction cartridges, ChemElut: HLB for HCAs and Accucat: HLB for acrylamide, were used for efficiently removing interferences such as pigment, lipid, polar, nonpolar and ionic compounds. Established method was validated in terms of recovery, accuracy, precision, limit of detection, limit of quantitation, and linearity. This method showed good precision (RSD < 20%), accuracy (71.8~119.1%) and recovery (66.0~118.9%). The detection limits were < 3.1 ng/g for all analytes. The correlation coefficients for all the HCAs and acrylamide were > 0.995, showing excellent linearity. These methods for the detection of HCAs and acrylamide by LC-MS/MS were applied to real samples and were successfully used for quantitative monitoring in the total diet study and this can be applied to risk assessment in various food matrices.
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Affiliation(s)
- Kyung-Jun Lee
- Korea Research Institute of Analytical Technology, Daejeon, Korea
- Department of Chemistry, Chungnam National University, Daejeon, Korea
| | - Gae-Ho Lee
- Korea Research Institute of Analytical Technology, Daejeon, Korea
- Department of Chemistry, Chungnam National University, Daejeon, Korea
| | - HaeSol Kim
- Department of Chemistry, Yonsei University, Seoul, Korea
| | - Min-Seok Oh
- Advanced Analysis Center, Korea Institute of Science and Technology, Seoul, Korea
| | - Seok Chu
- Department of Chemistry, Yonsei University, Seoul, Korea
| | - In Ju Hwang
- Advanced Analysis Center, Korea Institute of Science and Technology, Seoul, Korea
| | - Jee-yeon Lee
- Nutrition Policy & Promotion Team, Korea Health Industry Development Institute, Chungcheongbuk-do, Korea
| | - Ari Choi
- Nutrition Policy & Promotion Team, Korea Health Industry Development Institute, Chungcheongbuk-do, Korea
| | - Cho-il Kim
- Bureau of Health Industry Promotion, Korea Health Industry Development Institute, Chungcheongbuk-do, Korea
| | - Hyun-Mee Park
- Advanced Analysis Center, Korea Institute of Science and Technology, Seoul, Korea
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Affiliation(s)
- M S Oh
- Department of Medicine, SUNY, Health Science Center, Brooklyn, N.Y
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28
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Urasinski T, Stasyshyn O, Andreeva T, Rusen L, Perina FG, Oh MS, Chapman M, Pavlova BG, Valenta-Singer B, Abbuehl BE. Recombinant factor IX (BAX326) in previously treated paediatric patients with haemophilia B: a prospective clinical trial. Haemophilia 2014; 21:196-203. [PMID: 25495591 DOI: 10.1111/hae.12548] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/13/2014] [Indexed: 11/26/2022]
Abstract
A newly developed recombinant factor IX (BAX326(1) ) was investigated for prophylactic use in paediatric patients aged <12 years with severe (FIX level <1%) or moderately severe (FIX level 1-2%) haemophilia B. The aim of this prospective clinical trial was to assess the safety, haemostatic efficacy and pharmacokinetic profile of BAX326 in previously treated paediatric patients. BAX326 was administered as prophylaxis twice a week for a period of 6 months, and on demand for treatment of bleeds. Safety was assessed by the occurrence of related AEs, thrombotic events and immunologic assessments. Efficacy was evaluated by annualized bleeding rate (ABR), and by treatment response rating (excellent, good, fair, none). PK was assessed over 72 h. None of the 23 treated paediatric subjects had treatment-related SAEs or AEs. There were no thrombotic events, inhibitory or specific binding antibodies against FIX, rFurin or CHO protein. Twenty-six bleeds (19 non-joint vs. 7 joint bleeds) occurred (mean ABR 2.7 ± 3.14, median 2.0), of which 23 were injury-related. Twenty subjects (87%) did not experience any bleeds of spontaneous aetiology. Haemostatic efficacy of BAX326 was excellent or good for >96% of bleeds (100% of minor, 88.9% of moderate and 100% of major bleeds); the majority (88.5%) resolved after 1-2 infusions. Longer T1/2 and lower IR were observed in younger children (<6 years) compared to those aged 6 to 12 years. BAX326 administered as prophylactic treatment as well as for controlling bleeds is efficacious and safe in paediatric patients aged <12 years with haemophilia B.
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Affiliation(s)
- T Urasinski
- Department of Paediatrics, Paediatric Haematology and Oncology, Pomeranian Medical University in Szczecin, Szczecin, Poland
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Oh MS, Yang JY, Kim MG, Lee HS. Acaricidal activities of β-caryophyllene oxide and structural analogues derived from Psidium cattleianum oil against house dust mites. Pest Manag Sci 2014; 70:757-762. [PMID: 23861316 DOI: 10.1002/ps.3608] [Citation(s) in RCA: 10] [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: 01/30/2013] [Revised: 07/01/2013] [Accepted: 07/16/2013] [Indexed: 06/02/2023]
Abstract
BACKGROUND This study was to evaluate the acaricidal activities of an active compound isolated from Psidium cattleianum and structural analogues against Dermatophagoides farinae and D. pteronyssinus. β-Caryophyllene oxide was isolated using chromatographic techniques. RESULTS Based on the 50% lethal concentration (LD50) values against D. farinae using the fumigant method, β-caryophyllene oxide (1.36 µg cm(-2)) was ∼ 7.52 times more toxic than benzyl benzoate (10.23 µg cm(-2)), followed by α-caryophyllene (1.75 µg cm(-2)) and β-caryophyllene (3.13 µg cm(-2)). Against D. pteronyssinus, β-caryophyllene oxide (1.38 µg cm(-2)) was ∼ 7.22 times more toxic than benzyl benzoate (9.96 µg cm(-2)), followed by α-caryophyllene (1.71 µg cm(-2)) and β-caryophyllene (3.58 µg cm(-2)). In the contact toxicity method against D. farinae, β-caryophyllene oxide (0.44 µg cm(-2)) was ∼ 17.27 times more active than benzyl benzoate (7.60 µg cm(-2)), followed by α-caryophyllene (0.67 µg cm(-2)) and β-caryophyllene (0.91 µg cm(-2)). Against D. pteronyssinus, β-caryophyllene oxide (0.47 µg cm(-2)) was ∼ 13.06 times more effective than benzyl benzoate (6.14 µg cm(-2)), followed by α-caryophyllene (1.71 µg cm(-2)) and β-caryophyllene (3.58 µg cm(-2)). CONCLUSION β-Caryophyllene oxide and structural analogues have potential for development as preventive agents for the control of house dust mites.
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Affiliation(s)
- Min-Seok Oh
- Department of Bioenvironmental Chemistry and Institute of Agricultural Science and Technology, College of Agriculture and Life Sciences, Chonbuk National University, Jeonju, 561-756, South Korea
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Oh MS, Lee SH, Moon MH, Lee DS, Park HM. Simultaneous analysis of phthalates, adipate and polycyclic aromatic hydrocarbons in edible oils using isotope dilution-gas chromatography-mass spectrometry. Food Addit Contam Part B Surveill 2014; 7:168-75. [PMID: 25029399 DOI: 10.1080/19393210.2013.869770] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
A method for simultaneous determination of 12 priority phthalates, adipate and polycyclic aromatic hydrocarbons (PAHs) in edible oils by isotope dilution-gas chromatography-mass spectrometry (ID-GC-MS) was developed for fast, accurate and trace analysis. The extraction and clean-up procedures were optimised, and using stable isotope-labelled internal standards for each analyte, relative standard deviations (RSDs) of 0.92-10.6% and spiked sample recoveries of 80.6-97.8% were obtained. Limits of detection for PAHs were in the range of 0.15-0.77 µg/kg and those for phthalates were in the range of 4.6-10.0 µg/kg. The calibration curves exhibited good linearities with regression coefficients of R(2) ≥ 0.99. Twelve edible oils were examined to evaluate the efficiency of this method. Among the 12 analytes, dibutyl phthalates (DBP), diethylhexyl phthalates (DEHP), diethylhexyl adipate (DEHA), benzo[a]anthracene (B[a]A), chrysene (Chry) and benzo[b]fluoranthene (B[b]F) were detected in the range of 1.17-806 µg/kg.
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Affiliation(s)
- Min-Seok Oh
- a Advanced Analysis Center, Korea Institute of Science and Technology , Seoul , Republic of Korea
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Oh MS, Jung SH, Choi SH. Synthesis and characterization of coordination polymer nanoparticles as radioisotope tracers. Appl Radiat Isot 2013; 85:19-22. [PMID: 24362459 DOI: 10.1016/j.apradiso.2013.11.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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: 09/03/2012] [Revised: 10/27/2013] [Accepted: 11/07/2013] [Indexed: 11/16/2022]
Abstract
Coordination polymer nanoparticles (NPs) with gamma-emitting nuclide (Au-198), 411keV, 675keV, 822keV and 1087keV were prepared by coordination polymerization of the radioisotope Au(3+) ions and 1,4-bis(imidazole-1-ylmethyl)benzene in an aqueous solution at room temperature for 3h. Here, the radioisotope Au(3+) ions were prepared by dissolution of Au-198 foil, which was prepared by neutron irradiation from the HANARO reactor, in KCN aqueous solution. The successful synthesis of the radioisotope coordination polymer NPs with 5±0.5nm was confirmed via UV-vis spectroscopy, Transmission Electron Microscopy (TEM), Energy Dispersive X-ray Spectrometry (EDXS), Thermogravimetric analysis (TGA), and Gamma spectroscopy analysis. The synthesized radioisotope coordination polymer NPs can be used as radiotracers in science, engineering, and industrial fields.
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Affiliation(s)
- Min-Seok Oh
- Department of Chemistry, Hannam University, Daejeon 305-811, Republic of Korea
| | - Sung-Hee Jung
- Division of Radioisotope R&D, Korea Atomic Energy Research Institute, Daejeon 305-600, Republic of Korea.
| | - Seong-Ho Choi
- Department of Chemistry, Hannam University, Daejeon 305-811, Republic of Korea.
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Kim SJ, Kang JH, Park JW, Hong SY, Heo DS, Yoon IJ, Oh MS. The Characteristics of Traffic Accident Admission Patients in Oriental Medicine Hospital. J Pharmacopuncture 2007. [DOI: 10.3831/kpi.2007.10.2.133] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Kang JH, Kim SJ, Park JW, Heo DS, Yoon IJ, Oh MS, Hong SY. The Clinical Report on the 3 Cases of Sciatica treated on Direct Moxibustion. J Pharmacopuncture 2007. [DOI: 10.3831/kpi.2007.10.2.139] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Abstract
The following basic rules of parenteral fluid therapy are formulated with the aim of alleviating concern and confusion about i.v. fluid orders that are experienced by most physicians: Don't be generous with fluid; in determining the water intake, one must know the usual water output through the kidney, skin and lung; one must know the quantities of the electrolytes and nutrients that are being given, and know the initial volume of distribution (usually the ECF); one must know the aim of fluid therapy; one must not give and remove the same substance at the same time; one must be aware that hypertonic saline contains less water for a given amount of Na than isotonic saline; one must be familiar with different i.v. solutions and i.v. additives; one must be aware that the kidney does not manufacture water or electrolytes except for bicarbonate; for short-term fluid therapy, divalent ions (Ca, Mg, and P) do not need replacement; one should think about COP-wedge gradient in determining the type of fluid to be given.
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Affiliation(s)
- M S Oh
- Department of Medicine, State University of New York, Health Science Center at Brooklyn, Brooklyn, N.Y. 11203, USA.
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Halperin ML, Bichet DG, Oh MS. Integrative physiology of basal water permeability in the distal nephron: implications for the syndrome of inappropriate secretion of antidiuretic hormone. Clin Nephrol 2001; 56:339-45. [PMID: 11758003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023] Open
Abstract
Patients who drink more electrolyte-free water than they can excrete may develop hyponatremia. A subgroup of hyponatremic patients has a reduced excretion of electrolyte-free water and a low rate of excretion of solutes even though vasopressin is not detected in their plasma. Basal water permeability in the distal nephron, by permitting a limited volume of electrolyte-free water to be reabsorbed, offers a way to help explain these findings. Basal water permeability will also be considered from the perspective of integrative physiology in evolutionary and developmental biology settings. Its possible clinical importance will be explored in patients with chronic hyponatremia who have a low distal volume delivery. These patients may develop osmotic demyelination if a large solute load leads to a very rapid excretion of electrolyte-free water.
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Affiliation(s)
- M L Halperin
- Renal Division, St. Michael's Hospital, University of Toronto, Ontario, Canada.
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Maeng CY, Oh MS, Park IH, Hong HJ. Purification and structural analysis of the hepatitis B virus preS1 expressed from Escherichia coli. Biochem Biophys Res Commun 2001; 282:787-92. [PMID: 11401532 DOI: 10.1006/bbrc.2001.4641] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The preS1 of hepatitis B virus (HBV) is located at the outermost part of the envelope protein and possesses several functionally important regions such as hepatocyte receptor-binding site and virus-neutralizing epitopes. As the first step to understand the structure-function relationship for the preS1 antigen, we have purified the preS1 and performed its structural characterization by circular dichroism (CD) spectroscopy. The preS1 was purified to near homogeneity from bacterially expressed glutathione S-transferase (GST)-preS1 fusion protein by two-step purification, affinity chromatography on glutathione-agarose column, and cation-exchange chromatography on Mono S column. The CD analysis showed that the purified preS1, which was largely unstructured in aqueous solution, acquired a significant (16%) alpha-helical structure when analyzed in 50% trifluoroethanol or 20 mM SDS. The results suggest that the preS1 assumes a mainly unstructured conformation and may form induced secondary structures upon binding to target proteins or under hydrophobic environment.
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Affiliation(s)
- C Y Maeng
- Antibody Engineering Research Laboratory, Korea Research Institute of Bioscience and Biotechnology, Yusong, Taejon, 305-600
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Abstract
Eight diterpenes and norditerpenes including five new xenicane metabolites (4--8) have been isolated from the gorgonian Acalycigorgia inermis. The structures of these compounds have been determined by combined spectroscopic analysis. The new compounds exhibited significant cytotoxicity against a human leukemia cell-line.
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Affiliation(s)
- J R Rho
- Marine Natural Products Laboratory, Korea Ocean Research & Development Institute, Ansan P.O. Box 29, Seoul 425-600 Korea
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Abstract
RATIONALE AND OBJECTIVES The authors' purpose was to determine whether there is a relationship between subjective assessment of radiology resident performance on individual rotations and objective assessment of radiology resident performance on the American College of Radiology (ACR) in-training and American Board of Radiology (ABR) written examinations. MATERIALS AND METHODS Records of 81 radiology residents completing their residency between 1991 and 2000 were reviewed. Mean scores from all rotation evaluation forms obtained during the study period were calculated for each residency year. The means of the overall raw scores and percentiles obtained on the annual ACR in-training examinations during the first 3 years of residency and of the written portion of the ABR examination taken during the 4th year of residency were also determined. Rotation evaluation scores were then compared to examination scores obtained during the same year of residency, and correlation coefficients were obtained. RESULTS In the 2nd, 3rd, and 4th years of radiology residency, there is positive correlation between rotation evaluation scores and overall scores from the corresponding ACR in-training examination and written portion of the ABR examination taken during the same year. In contrast, in the 1st year of residency, resident rotation evaluation scores do not correlate with ACR in-training examination scores. CONCLUSION Residents who are perceived as doing well on their rotations after the 1st year of residency are more likely to do well on standardized written examinations.
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Affiliation(s)
- S Adusumilli
- Department of Radiology, University of Michigan Health System, Ann Arbor, USA
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Adusumilli S, Cohan RH, Marshall KW, Fitzgerald JT, Oh MS, Gross BH, Ellis JH. How well does applicant rank order predict subsequent performance during radiology residency? Acad Radiol 2000; 7:635-40. [PMID: 10952115 DOI: 10.1016/s1076-6332(00)80580-2] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
RATIONALE AND OBJECTIVES Residency selection committees expend substantial time and resources on assessing the quality of residency applicants to derive an appropriate rank order for the National Residency Matching Program. The authors determined whether there is a relationship between the rank number or rank percentile of applicants selected for a residency training program and subsequent radiology residency performance. MATERIALS AND METHODS Records of radiology residents completing their residency between 1991 and 1998 were reviewed. Available rank numbers and rank percentiles for each resident were compared with subsequent performance, as assessed subjectively by 4th-year radiology rotation evaluation forms and retrospective recall of four senior faculty members and objectively by numerical and percentile scores on the written portion of the American Board of Radiology (ABR) examinations. Correlation coefficients were obtained for each comparison. RESULTS Rank number and rank percentile were not significantly correlated with 4th-year resident rotation evaluations or ABR written examination scores or percentiles. A small correlation existed between rank order and retrospective evaluation of resident performance by the four senior faculty. CONCLUSION Applicant rank number and rank percentile do not correlate with subsequent radiology residency performance as assessed on rotation evaluation forms or the ABR written examinations.
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Affiliation(s)
- S Adusumilli
- Department of Radiology, University of Michigan Health System, Ann Arbor, USA
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Abstract
This review will cover two main areas of acid-base balance, both of which are attended with much misconception and misunderstanding. One is the external balance of acids and alkali; the other is the contribution of bone buffering in acute and chronic metabolic acidosis.
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Affiliation(s)
- M S Oh
- Department of Medicine, SUNY Health Center at Brooklyn 11203, USA
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Zweifler AJ, Wolf FM, Oh MS, Fitzgerald JT, Hengstebeck LL. The importance of race in medical student performance of an AIDS risk assessment interview with simulated patients. Med Educ 2000; 34:175-181. [PMID: 10733702 DOI: 10.1046/j.1365-2923.2000.00455.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
INTRODUCTION This study was done to ascertain the effect of race on medical student-patient communication. The primary hypothesis was that interviewing performance scores would be higher when race of student and race of simulated patient instructor (SPI) were concordant than when they were discordant. METHODS Data obtained from student interactions with four Caucasian and four African American female SPIs participating in a case involving an AIDS risk assessment interview were analysed. Performance was assessed using two instruments: an 8-item behaviourally anchored interviewing skills scale and a 14-item checklist reflecting content relevant to sexual behaviour and AIDS risk. SPI groups were comparable and SPIs were trained to a high level of inter-rater reliability. Students (24 African American and 180 non-African American) were assigned to SPIs based on the spelling of the student's name. Performance was scored independently at the conclusion of each interview by both the SPI and the student her/himself. RESULTS African American students had lower scale scores than non-African American students in interactions with Caucasian (but not African American) SPIs; and all student scores, both on the skills scale and the content checklist, were higher with African American than with Caucasian SPIs (as assessed by both SPI and student). Women students had higher scores than men. CONCLUSIONS Race of SPI has an influence on student performance of an AIDS risk assessment interview. Further studies focusing on racial interactions in the medical interview are required. It appears that race of SPI may need to be accounted for in the development and interpretation of SPI-based clinical competence exams.
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Affiliation(s)
- A J Zweifler
- Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, Michigan 48109-0356, USA
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Lee SS, Bae JM, Oh MS, Liu JR, Harn CH. Isolation and characterization of polymorphic cDNAs partially encoding ADP-glucose pyrophosphorylase (AGPase) large subunit from sweet potato. Mol Cells 2000; 10:108-12. [PMID: 10774756 DOI: 10.1007/s10059-000-0108-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
cDNA clones encoding sweet potato AGPase large subunit (iAGPLI) from the cDNA library constructed from the tuberous root were isolated. Two clones were characterized and named iAGPLI-a and iAGPLI-b. They were 1,661 bp and 1,277 bp in length and contained partial open reading frames of 450 and 306 amino acids, respectively. Both nucleic acid and amino acid sequence identities between iAGPLI-a and iAGPLI-b were 83.8% and 97.3%, respectively. Based on the amino acid sequence analysis, iAGPLI-a and iAGPLI-b share the highest sequence identity (81%) with potato AGPase large subunit. The iAGPLI-a and iAGPLI-b genes were expressed predominantly in the stem and weakly in the tuberous root, and no transcript was expressed in other tissues. The sweet potato genome contains several copies of the iAGPLI gene.
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MESH Headings
- Amino Acid Sequence
- Base Sequence
- Blotting, Northern
- Blotting, Southern
- DNA, Complementary/chemistry
- DNA, Complementary/genetics
- DNA, Complementary/isolation & purification
- DNA, Plant/genetics
- Gene Dosage
- Gene Expression Regulation, Enzymologic
- Gene Expression Regulation, Plant
- Glucose-1-Phosphate Adenylyltransferase
- Isoenzymes/genetics
- Molecular Sequence Data
- Nucleotidyltransferases/genetics
- Phylogeny
- Polymorphism, Genetic
- RNA, Plant/genetics
- RNA, Plant/metabolism
- Sequence Alignment
- Sequence Analysis, DNA
- Sequence Homology, Amino Acid
- Solanaceae/enzymology
- Solanaceae/genetics
- Tissue Distribution
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Affiliation(s)
- S S Lee
- Plant Cell and Molecular Biology Research Unit, Korea Research Institute of Bioscience and Biotechnology, Taejon
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Song MK, Oh MS, Lee JH, Lee JN, Chung JH, Park SG, Choi IH. Light chain of natural antibody plays a dominant role in protein antigen binding. Biochem Biophys Res Commun 2000; 268:390-4. [PMID: 10679214 DOI: 10.1006/bbrc.2000.2134] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Examinations of the contribution and the specificity of heavy (H) and light (L) chains of natural antibodies to antigen binding may help us to better understand antigen recognition and the development of naive B cells. We previously generated natural Fab antibody fragments reactive to preS1 of HBV using a naive, non-immunized Fab antibody library derived from peripheral B cells of a normal healthy volunteer. We now constructed expression vectors for the Fd (VH + CH1), L chain, and scFv fragments using the sequences encoding parental Fabs as a source of natural antibody genes. The recombinant antibody fragments were expressed as inclusion bodies in E. coli BL21 (DE) cells. When denatured and then refolded, the antibody fragments retained their binding properties. Recombinant L chains and scFvs exhibited three- to 40-fold higher affinities (in the order of 10(7) M(-1)) over the parental Fabs, whereas the affinities of Fds (in the order of 10(5) M(-1)) were much lower compared to the parental Fabs. The results obtained from sandwich ELISA revealed that the L chains bound the virus more efficiently than Fds. Additional experiments were performed to evaluate the specificity of the recombinant fragments for surface proteins of HBV. Fds and L chains were reactive towards HBsAg and the preS2 peptide as well as preS1 and showed patterns of epitope recognition quite different from those of parental Fabs. The data presented here demonstrate that the prominence of the L chain in determining protein binding activity is a property of natural antibodies and is quite unlike the antibodies induced by immunization, and that the specificity of Fab is not determined by the individual antibody chain but by the correct pairing of H and L chain.
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Affiliation(s)
- M K Song
- Department of Microbiology, Inje University, Pusan, 614-735, Korea
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Abstract
It is widely believed that the cerebral salt-wasting syndrome (CSWS) exists as an entity distinct from the syndrome of inappropriate ADH secretion, and that it is characterized by evidence of severe renal salt wasting that results in volume depletion and hyponatremia. Proof of the existence of CSWS as an entity requires documentation of renal salt wasting and volume depletion. The present review has been undertaken to examine the evidence that the CSWS is a separate entity. In this effort, we have discussed various methods of documentation of volume depletion, and then reviewed reported cases of CSWS to determine whether volume depletion and renal salt wasting have been clearly demonstrated. Our review has led us to conclude that not one case of purported CSWS has demonstrated clear evidence of volume depletion and renal salt wasting. If renal salt wasting had been proven in these cases, we would conclude that the likely site of renal salt transport was the proximal tubule. The proximal site of salt transport defect has been suggested by the absence of hyperreninemia and hypokalemia, which would be a distinguishing feature of Bartter's syndrome and Gitelman's syndrome.
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Affiliation(s)
- M S Oh
- Department of Medicine, State University of New York, Health Science Center at Brooklyn, NY 11203, USA
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Kim BK, Lee JC, Jhon YM, Kim MW, Kim SK, Choi SS, Oh MS. Characteristics of the intracavity dispersion in an erbium-doped fiber laser. Opt Lett 1999; 24:391-393. [PMID: 18071516 DOI: 10.1364/ol.24.000391] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We have found theoretically that the intracavity dispersion of a laser is independent of the pumping power and wavelength and that the resonant group-velocity dispersion vanishes. We have experimentally observed that the intracavity dispersion of an erbium-doped fiber laser was independent of the pumping power and wavelength within the measuring error, which agrees well with our theoretical predictions.
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Gowrishankar M, Lin SH, Mallie JP, Oh MS, Halperin ML. Acute hyponatremia in the perioperative period: insights into its pathophysiology and recommendations for management. Clin Nephrol 1998; 50:352-60. [PMID: 9877108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023] Open
Abstract
Our purpose is to review the topic of acute postoperative hyponatremia by focusing on pertinent aspects of the physiology of water and solute excretion. Four areas will be highlighted: an examination of the source of addition of electrolyte-free water, an exploration of the basis for the very large natriuresis that occurs during cerebral salt wasting following neurosurgery, possible reasons to explain why acute postoperative hyponatremia may pose a greater risk for young women [Ayus and Arieff 1996, Ayus et al. 1992, Arieff 1986, Wijdick et al. 1991], and issues related to treatment of acute hyponatremia.
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Affiliation(s)
- M Gowrishankar
- Department of Pediatrics, University of Alberta, Edmonton, Canada
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Abstract
This report describes a case of d-lactic acidosis observed by the authors and then reviews all case reports of d-lactic acidosis in the literature in order to define its clinical and biochemical features and pathogenetic mechanisms. The report also reviews the literature on metabolism of d-lactic acid in humans. The clinical presentation of d-lactic acidosis is characterized by episodes of encephalopathy and metabolic acidosis. The diagnosis should be considered in a patient who presents with metabolic acidosis and high serum anion gap, normal lactate level, negative Acetest, short bowel syndrome or other forms of malabsorption, and characteristic neurologic findings. Development of the syndrome requires the following conditions 1) carbohydrate malabsorption with increased delivery of nutrients to the colon, 2) colonic bacterial flora of a type that produces d-lactic acid, 3) ingestion of large amounts of carbohydrate, 4) diminished colonic motility, allowing time for nutrients in the colon to undergo bacterial fermentation, and 5) impaired d-lactate metabolism. In contrast to the initial assumption that d-lactic acid is not metabolized by humans, analysis of published data shows a substantial rate of metabolism of d-lactate by normal humans. Estimates based on these data suggest that impaired metabolism of d-lactate is almost a prerequisite for the development of the syndrome.
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Affiliation(s)
- J Uribarri
- Department of Medicine, Mount Sinai Medical Center, New York, New York 10029, USA
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Abstract
This study examines endogenous acid production in a group of stable chronic hemodialysis patients with no residual renal function who were admitted to the chronic hemodialysis unit of Mount Sinai Hospital. Net acid production was estimated by the change in body bicarbonate content, which occurs in the interdialytic period. The body bicarbonate content at any time was measured by multiplying the concentration of blood bicarbonate by the apparent bicarbonate space at that time. The apparent bicarbonate space was determined by the change in blood bicarbonate concentration induced by the intravenous administration of a known amount of sodium bicarbonate. Daily sulfuric acid production was also estimated from the reduction in body sulfate content during dialysis. The interdialytic net acid production was measured at approximately 28 mEq/d, a value much lower than that predicted from the protein catabolic rate. This reduced acid production can be explained by reduced sulfuric acid and organic acid production. The mechanism of reduced sulfuric acid production is unknown. Reduced organic acid production is explained partly by the absence of renal excretion of metabolizable organic anions, leaving only the nonmetabolizable fraction as the main source of acid in the interdialytic period.
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Affiliation(s)
- J Uribarri
- Department of Medicine, Mount Sinai Medical Center, New York, New York 10029, USA
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Eyler AE, Dicken LL, Fitzgerald JT, Oh MS, Wolf FM, Zweifler AJ. Teaching smoking-cessation counseling to medical students using simulated patients. Am J Prev Med 1997; 13:153-8. [PMID: 9181201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
OBJECTIVE Our objective was to evaluate the effectiveness of using simulated patient instructors and the Ockene method to instruct third-year medical students in smoking-cessation counseling techniques. DESIGN We used a clinical exercise with self-study preparation and simulated patient instructors. METHODS One hundred fifty-nine students participated in a smoking-cessation counseling session in which cognitive and behavioral endpoints were assessed by simulated patient instructors and the students themselves. RESULTS Student performance in the cognitive and behavioral components of model smoking-cessation counseling was acceptable. Specific areas of weakness, such as the tendency of students to underemphasize the personal and social benefits of smoking cessation, and to overestimate their competence on a number of skill items, were identified. Student evaluation of the exercise was positive. CONCLUSIONS Smoking-cessation counseling can be taught effectively to third-year medical students by simulated patient instructors during a clinical clerkship.
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Affiliation(s)
- A E Eyler
- Department of Family Practice, University of Michigan Medical School, Ann Arbor 48109-0356, USA
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