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Babiarz J, Ryu H, Williams C, Ham Y, Rivera Sarti J, Levander XA. Slicing through silos: Development and evaluation of a hospital-based telehealth hepatitis C virus treatment program. Int J Drug Policy 2024; 127:104396. [PMID: 38593518 DOI: 10.1016/j.drugpo.2024.104396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 03/12/2024] [Accepted: 03/14/2024] [Indexed: 04/11/2024]
Abstract
BACKGROUND There exist many barriers to hepatitis C virus (HCV) treatment for those with substance use disorder (SUD) or who lack access to routine medical care. A hospital-based telehealth program was developed to provide treatment opportunities for hospitalized patients living with HCV. METHODS This single site prospective cohort study conducted from July 2022 to March 2023 aimed to measure linkage to care with an HCV clinician and initiation of HCV treatment in hospitalized patients. Patients were assessed in-person by a social worker then seen via telehealth by a clinician who prescribed either glecaprevir/pibrentasvir or sofosbuvir/velpatasvir. Treatment was initiated with pharmacist assistance. The team conducted in-person and/or telephonic outreach during and after hospitalization. Cure was confirmed by sustained virologic response at 12 weeks (SVR12) post-treatment. RESULTS A total of 25 patients were enrolled and completed telehealth visits. All patients had a history of SUD and 18 (72 %) were unstably housed. Nineteen patients (76 %) initiated treatment, and 14 (56 %) successfully completed treatment. Twelve patients (48 %) completed post-treatment labs, including two who prematurely discontinued treatment. Eleven patients (44 %) achieved confirmed cure with SVR12. CONCLUSION A hospital-based, multidisciplinary telehealth program can be an innovative care model to successfully treat HCV in a difficult-to-treat patient populations.
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Affiliation(s)
- J Babiarz
- Department of Medicine, Division of Internal Medicine and Geriatrics, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., Portland, OR 97239 United States
| | - H Ryu
- Department of Pharmacy, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., Portland, OR 97239 United States
| | - C Williams
- Department of Care Management, Division of General Internal Medicine and Geriatrics, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., Portland, OR 97239 United States
| | - Y Ham
- Department of Pharmacy, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., Portland, OR 97239 United States
| | - J Rivera Sarti
- Department of Medicine, Division of Infectious Disease, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., Portland, OR 97239 United States
| | - X A Levander
- Department of Medicine, Division of General Internal Medicine and Geriatrics, Section of Addiction Medicine, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., Portland, OR 97239 United States
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Jeon S, Choi H, Jeon Y, Choi WH, Choi H, An K, Ryu H, Bhak J, Lee H, Kwon Y, Ha S, Kim YJ, Blazyte A, Kim C, Kim Y, Kang Y, Woo YJ, Lee C, Seo J, Yoon C, Bolser D, Biro O, Shin ES, Kim BC, Kim SY, Park JH, Jeon J, Jung D, Lee S, Bhak J. Korea4K: whole genome sequences of 4,157 Koreans with 107 phenotypes derived from extensive health check-ups. Gigascience 2024; 13:giae014. [PMID: 38626723 PMCID: PMC11020240 DOI: 10.1093/gigascience/giae014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 11/28/2023] [Accepted: 03/15/2024] [Indexed: 04/18/2024] Open
Abstract
BACKGROUND Phenome-wide association studies (PheWASs) have been conducted on Asian populations, including Koreans, but many were based on chip or exome genotyping data. Such studies have limitations regarding whole genome-wide association analysis, making it crucial to have genome-to-phenome association information with the largest possible whole genome and matched phenome data to conduct further population-genome studies and develop health care services based on population genomics. RESULTS Here, we present 4,157 whole genome sequences (Korea4K) coupled with 107 health check-up parameters as the largest genomic resource of the Korean Genome Project. It encompasses most of the variants with allele frequency >0.001 in Koreans, indicating that it sufficiently covered most of the common and rare genetic variants with commonly measured phenotypes for Koreans. Korea4K provides 45,537,252 variants, and half of them were not present in Korea1K (1,094 samples). We also identified 1,356 new genotype-phenotype associations that were not found by the Korea1K dataset. Phenomics analyses further revealed 24 significant genetic correlations, 14 pleiotropic associations, and 127 causal relationships based on Mendelian randomization among 37 traits. In addition, the Korea4K imputation reference panel, the largest Korean variants reference to date, showed a superior imputation performance to Korea1K across all allele frequency categories. CONCLUSIONS Collectively, Korea4K provides not only the largest Korean genome data but also corresponding health check-up parameters and novel genome-phenome associations. The large-scale pathological whole genome-wide omics data will become a powerful set for genome-phenome level association studies to discover causal markers for the prediction and diagnosis of health conditions in future studies.
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Affiliation(s)
- Sungwon Jeon
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Clinomics, Inc., Ulsan 44919, Republic of Korea
| | - Hansol Choi
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Department of Biomedical Engineering, College of Information-Bio Convergence Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Yeonsu Jeon
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Clinomics, Inc., Ulsan 44919, Republic of Korea
| | - Whan-Hyuk Choi
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Department of Biomedical Engineering, College of Information-Bio Convergence Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Department of Mathematics, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Hyunjoo Choi
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Department of Biomedical Engineering, College of Information-Bio Convergence Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Kyungwhan An
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Department of Biomedical Engineering, College of Information-Bio Convergence Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Hyojung Ryu
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Clinomics, Inc., Ulsan 44919, Republic of Korea
| | - Jihun Bhak
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Department of Biomedical Engineering, College of Information-Bio Convergence Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Hyeonjae Lee
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Department of Biomedical Engineering, College of Information-Bio Convergence Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Yoonsung Kwon
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Department of Biomedical Engineering, College of Information-Bio Convergence Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Sukyeon Ha
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Department of Computer Science & Engineering (CSE), College of Information-Bio Convergence Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Yeo Jin Kim
- Clinomics, Inc., Ulsan 44919, Republic of Korea
| | - Asta Blazyte
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Department of Biomedical Engineering, College of Information-Bio Convergence Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Lee Gil Ya Cancer and Diabetes Institute, Gachon University, Incheon 21999, Republic of Korea
| | | | | | - Younghui Kang
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Clinomics, Inc., Ulsan 44919, Republic of Korea
| | | | - Chanyoung Lee
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Department of Biomedical Engineering, College of Information-Bio Convergence Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Jeongwoo Seo
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Department of Biomedical Engineering, College of Information-Bio Convergence Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Changhan Yoon
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Department of Biomedical Engineering, College of Information-Bio Convergence Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Dan Bolser
- Geromics Ltd., Cambridge CB1 3NF, United Kingdom
| | | | - Eun-Seok Shin
- Department of Cardiology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan 44033, Republic of Korea
| | | | - Seon-Young Kim
- Korea Bioinformation Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
| | - Ji-Hwan Park
- Korea Bioinformation Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
| | - Jongbum Jeon
- Korea Bioinformation Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
| | - Dooyoung Jung
- Department of Biomedical Engineering, College of Information-Bio Convergence Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Semin Lee
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Department of Biomedical Engineering, College of Information-Bio Convergence Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Jong Bhak
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Clinomics, Inc., Ulsan 44919, Republic of Korea
- Department of Biomedical Engineering, College of Information-Bio Convergence Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Personal Genomics Institute (PGI), Genome Research Foundation (GRF), Osong 28160, Republic of Korea
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Cho Y, Ryu H, Lim G, Nam S, Lee J. Improving Geometric Validation Metrics and Ensuring Consistency with Experimental Data through TrioSA: An NMR Refinement Protocol. Int J Mol Sci 2023; 24:13337. [PMID: 37686144 PMCID: PMC10487420 DOI: 10.3390/ijms241713337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 08/21/2023] [Accepted: 08/24/2023] [Indexed: 09/10/2023] Open
Abstract
Protein model refinement a the crucial step in improving the quality of a predicted protein model. This study presents an NMR refinement protocol called TrioSA (torsion-angle and implicit-solvation-optimized simulated annealing) that improves the accuracy of backbone/side-chain conformations and the overall structural quality of proteins. TrioSA was applied to a subset of 3752 solution NMR protein structures accompanied by experimental NMR data: distance and dihedral angle restraints. We compared the initial NMR structures with the TrioSA-refined structures and found significant improvements in structural quality. In particular, we observed a reduction in both the maximum and number of NOE (nuclear Overhauser effect) violations, indicating better agreement with experimental NMR data. TrioSA improved geometric validation metrics of NMR protein structure, including backbone accuracy and the secondary structure ratio. We evaluated the contribution of each refinement element and found that the torsional angle potential played a significant role in improving the geometric validation metrics. In addition, we investigated protein-ligand docking to determine if TrioSA can improve biological outcomes. TrioSA structures exhibited better binding prediction compared to the initial NMR structures. This study suggests that further development and research in computational refinement methods could improve biomolecular NMR structural determination.
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Affiliation(s)
- Youngbeom Cho
- Department of Bioinformatics, KRIBB School of Bioscience, University of Science and Technology (UST), Daejeon 34141, Republic of Korea;
- Disease Target Structure Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of Korea; (H.R.); (G.L.)
| | - Hyojung Ryu
- Disease Target Structure Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of Korea; (H.R.); (G.L.)
| | - Gyutae Lim
- Disease Target Structure Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of Korea; (H.R.); (G.L.)
| | - Seungyoon Nam
- Department of Genome Medicine and Science, AI Convergence Center for Medical Science, Gachon Institute of Genome Medicine and Science, Gachon University Gil Medical Center, Gachon University College of Medicine, Incheon 21565, Republic of Korea
- Department of Health Sciences and Technology, Gachon Advanced Institute for Health Sciences and Technology, Gachon University, Incheon 21999, Republic of Korea
| | - Jinhyuk Lee
- Department of Bioinformatics, KRIBB School of Bioscience, University of Science and Technology (UST), Daejeon 34141, Republic of Korea;
- Disease Target Structure Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of Korea; (H.R.); (G.L.)
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Jeon Y, Jeon S, An K, Kim YJ, Kim BC, Ryu H, Choi WH, Choi H, Kim W, Lee SY, Bae JW, Hwang JY, Kang MG, An S, Kim Y, Kang Y, Kim BC, Bhak J, Shin ES. Identification and validation of six acute myocardial infarction-associated variants, including a novel prognostic marker for cardiac mortality. Front Cardiovasc Med 2023; 10:1226971. [PMID: 37465449 PMCID: PMC10350496 DOI: 10.3389/fcvm.2023.1226971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 06/20/2023] [Indexed: 07/20/2023] Open
Abstract
Background Acute myocardial infarction (AMI) is one of the leading causes of death worldwide, and approximately half of AMI-related deaths occur before the affected individual reaches the hospital. The present study aimed to identify and validate genetic variants associated with AMI and their role as prognostic markers. Materials and methods We conducted a replication study of 29 previously identified novel loci containing 85 genetic variants associated with early-onset AMI using a new independent set of 2,920 Koreans [88 patients with early- and 1,085 patients with late-onset AMI, who underwent percutaneous coronary intervention (PCI), and 1,747 healthy controls]. Results Of the 85 previously reported early-onset variants, six were confirmed in our genome-wide association study with a false discovery rate of less than 0.05. Notably, rs12639023, a cis-eQTL located in the intergenic region between LINC02005 and CNTN3, significantly increased longitudinal cardiac mortality and recurrent AMI. CNTN3 is known to play a role in altering vascular permeability. Another variant, rs78631167, located upstream of PLAUR and known to function in fibrinolysis, was moderately replicated in this study. By surveying the nearby genomic region around rs78631167, we identified a significant novel locus (rs8109584) located 13 bp downstream of rs78631167. The present study showed that six of the early-onset variants of AMI are applicable to both early- and late-onset cases. Conclusion Our results confirm markers that can potentially be utilized to predict, screen, prevent, and treat candidate patients with AMI and highlight the potential of rs12639023 as a prognostic marker for cardiac mortality in AMI.
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Affiliation(s)
- Yeonsu Jeon
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan, Republic of Korea
- Clinomics Inc., Ulsan, Republic of Korea
| | | | - Kyungwhan An
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan, Republic of Korea
- Department of Biomedical Engineering, College of Information-Bio Convergence Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, Republic of Korea
| | | | | | | | - Whan-Hyuk Choi
- Department of Mathematics, Kangwon National University, ChunCheon, Republic of Korea
| | - HyunJoo Choi
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan, Republic of Korea
- Department of Biomedical Engineering, College of Information-Bio Convergence Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, Republic of Korea
| | - Weon Kim
- Division of Cardiology, Department of Internal Medicine, Kyung Hee University Hospital, Kyung Hee University, Seoul, Republic of Korea
| | - Sang Yeub Lee
- Division of Cardiology, Department of Internal Medicine, Chung-Ang University College of Medicine, Chung-Ang University Gwangmyeong Hospital, Gwangmyeong, Republic of Korea
| | - Jang-Whan Bae
- Department of Internal Medicine, Chungbuk National University Hospital, College of Medicine, Chungbuk National University, Cheongju, Republic of Korea
| | - Jin-Yong Hwang
- Department of Internal Medicine, Gyeongsang National University School of Medicine and Gyeongsang National University Hospital, Jinju, Republic of Korea
| | - Min Gyu Kang
- Department of Internal Medicine, Gyeongsang National University School of Medicine and Gyeongsang National University Hospital, Jinju, Republic of Korea
| | - Seolbin An
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan, Republic of Korea
- Department of Biomedical Engineering, College of Information-Bio Convergence Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, Republic of Korea
| | | | | | | | - Jong Bhak
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan, Republic of Korea
- Clinomics Inc., Ulsan, Republic of Korea
- Department of Biomedical Engineering, College of Information-Bio Convergence Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, Republic of Korea
- Personal Genomics Institute (PGI), Genome Research Foundation (GRF), Osong, Republic of Korea
| | - Eun-Seok Shin
- Department of Cardiology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Republic of Korea
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Jang J, Lee SH, Kang DH, Sim DW, Ryu KS, Jo KS, Lee J, Ryu H, Kim EH, Won HS, Kim JH. Structural resemblance of the DNAJA-family protein, Tid1, to the DNAJB-family Hsp40. BMB Rep 2022. [PMID: 35651334 PMCID: PMC9623239 DOI: 10.5483/bmbrep.2022.55.10.051] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The specific pair of heat shock protein 70 (Hsp70) and Hsp40 constitutes an essential molecular chaperone system involved in numerous cellular processes, including the proper folding/refolding and transport of proteins. Hsp40 family members are characterized by the presence of a conserved J-domain (JD) that functions as a co-chaperone of Hsp70. Tumorous imaginal disc 1 (Tid1) is a tumor suppressor protein belonging to the DNAJA3 subfamily of Hsp40 and functions as a co-chaperone of the mitochondrial Hsp70, mortalin. In this work, we performed nuclear magnetic resonance spectroscopy to determine the solution structure of JD and its interaction with the glycine/phenylalanine-rich region (GF-motif) of human Tid1. Notably, Tid1-JD, whose conformation was consistent with that of the DNAJB1 JD, appeared to stably interact with its subsequent GF-motif region. Collectively with our sequence analysis, the present results demonstrate that the functional and regulatory mode of Tid1 resembles that of the DNAJB1 subfamily members rather than DNAJA1 or DNAJA2 subfamily proteins. Therefore, it is suggested that an allosteric interaction between mortalin and Tid1 is involved in the mitochondrial Hsp70/Hsp40 chaperone system.
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Affiliation(s)
- Jinhwa Jang
- College of Pharmacy, Chungbuk National University, Cheongju 28160, Korea
| | - Sung-Hee Lee
- College of Pharmacy, Chungbuk National University, Cheongju 28160, Korea
| | - Dong-Hoon Kang
- College of Pharmacy, Chungbuk National University, Cheongju 28160, Korea
| | - Dae-Won Sim
- Department of Biotechnology, Research Institute (RIBHS) and College of Biomedical and Health Science, Konkuk University, Chungju 27478, Korea
| | - Kyung-Suk Ryu
- Research Center for Bioconvergence Analysis, Korea Basic Science Institute, Cheongju 28119, Korea
| | - Ku-Sung Jo
- Department of Biotechnology, Research Institute (RIBHS) and College of Biomedical and Health Science, Konkuk University, Chungju 27478, Korea
| | - Jinhyuk Lee
- Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Korea
- Department of Bioinformatics, KRIBB School of Bioscience, University of Science and Technology (UST), Daejeon 34113, Korea
| | - Hyojung Ryu
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea
- Department of Biomedical Engineering, College of Information and Biotechnology, UNIST, Ulsan 44919, Korea
| | - Eun-Hee Kim
- Research Center for Bioconvergence Analysis, Korea Basic Science Institute, Cheongju 28119, Korea
| | - Hyung-Sik Won
- Department of Biotechnology, Research Institute (RIBHS) and College of Biomedical and Health Science, Konkuk University, Chungju 27478, Korea
- BK21 Project Team, Department of Applied Life Science, Graduate School, Konkuk University, Chungju 27478, Korea
- Corresponding authors. Ji-Hun Kim, Tel: +82-43-249-1343; Fax: +82-43-268-2732; E-mail: ; Hyung-Sik Won, Tel: +82-43-840-3589; Fax: +82-43-840-3048; E-mail: wonhs@kku. ac.kr
| | - Ji-Hun Kim
- College of Pharmacy, Chungbuk National University, Cheongju 28160, Korea
- Corresponding authors. Ji-Hun Kim, Tel: +82-43-249-1343; Fax: +82-43-268-2732; E-mail: ; Hyung-Sik Won, Tel: +82-43-840-3589; Fax: +82-43-840-3048; E-mail: wonhs@kku. ac.kr
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Park K, Nam J, Lee H, Kim T, Ryu H, Ki Y, Kim JJ, Oh S, Oh S, Hong Y. 1745P Phase II study of neoadjuvant chemotherapy with 4 cycles of dose dense MVAC followed by radical surgery in Korean patients with MIBC and locally advanced urothelial carcinoma of bladder (NCT04047693). Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.1823] [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: 12/01/2022] Open
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Yoo C, Kim KP, Kim I, Kang M, Cheon J, Kang B, Ryu H, Jeong J, Lee J, Kim K, Ryoo BY, Abou-Alfa G. 55P Final results from the NIFTY trial, a phase IIb, randomized, open-label study of liposomal Irinotecan (nal-IRI) plus fluorouracil (5-FU)/leucovorin (LV) in patients (pts) with previously treated metastatic biliary tract cancer (BTC). Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.083] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Ryu H, Song C, Kim J, Jeon J, Cho S, Kim K, Jheon S, Kim S, Kim Y, Lee J. PO-1241 Role of Prognostic Nutritional Index in Postoperative Radiotherapy for Non-Small Cell Lung Cancer. Radiother Oncol 2022. [DOI: 10.1016/s0167-8140(22)03205-4] [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: 10/18/2022]
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Jeon S, Blazyte A, Yoon C, Ryu H, Jeon Y, Bhak Y, Bolser D, Manica A, Shin ES, Cho YS, Kim BC, Ryoo N, Choi H, Bhak J. Regional TMPRSS2 V197M Allele Frequencies Are Correlated with COVID-19 Case Fatality Rates. Mol Cells 2021; 44:680-687. [PMID: 34588322 PMCID: PMC8490206 DOI: 10.14348/molcells.2021.2249] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 06/14/2021] [Accepted: 07/10/2021] [Indexed: 02/08/2023] Open
Abstract
Coronavirus disease, COVID-19 (coronavirus disease 2019), caused by SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2), has a higher case fatality rate in European countries than in others, especially East Asian ones. One potential explanation for this regional difference is the diversity of the viral infection efficiency. Here, we analyzed the allele frequencies of a nonsynonymous variant rs12329760 (V197M) in the TMPRSS2 gene, a key enzyme essential for viral infection and found a significant association between the COVID-19 case fatality rate and the V197M allele frequencies, using over 200,000 present-day and ancient genomic samples. East Asian countries have higher V197M allele frequencies than other regions, including European countries which correlates to their lower case fatality rates. Structural and energy calculation analysis of the V197M amino acid change showed that it destabilizes the TMPRSS2 protein, possibly negatively affecting its ACE2 and viral spike protein processing.
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Affiliation(s)
- Sungwon Jeon
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea
- Department of Biomedical Engineering, College of Information and Biotechnology, UNIST, Ulsan 44919, Korea
| | - Asta Blazyte
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea
- Department of Biomedical Engineering, College of Information and Biotechnology, UNIST, Ulsan 44919, Korea
| | - Changhan Yoon
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea
- Department of Biomedical Engineering, College of Information and Biotechnology, UNIST, Ulsan 44919, Korea
| | - Hyojung Ryu
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea
- Department of Biomedical Engineering, College of Information and Biotechnology, UNIST, Ulsan 44919, Korea
| | - Yeonsu Jeon
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea
- Department of Biomedical Engineering, College of Information and Biotechnology, UNIST, Ulsan 44919, Korea
| | - Youngjune Bhak
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea
- Department of Biomedical Engineering, College of Information and Biotechnology, UNIST, Ulsan 44919, Korea
| | | | - Andrea Manica
- Department of Zoology, University of Cambridge, Cambridge CB2 3EJ, UK
| | - Eun-Seok Shin
- Division of Cardiology, Department of Internal Medicine, Ulsan Medical Center, Ulsan 44686, Korea
- Personal Genomics Institute (PGI), Genome Research Foundation (GRF), Cheongju 28160, Korea
| | | | | | - Namhee Ryoo
- Department of Laboratory Medicine, Keimyung University School of Medicine, Daegu 42601, Korea
| | - Hansol Choi
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea
- Department of Biomedical Engineering, College of Information and Biotechnology, UNIST, Ulsan 44919, Korea
| | - Jong Bhak
- Korean Genomics Center (KOGIC), Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea
- Department of Biomedical Engineering, College of Information and Biotechnology, UNIST, Ulsan 44919, Korea
- Geromics, Ltd., Cambridge CB1 3NF, UK
- Personal Genomics Institute (PGI), Genome Research Foundation (GRF), Cheongju 28160, Korea
- Clinomics, Inc., Ulsan 44919, Korea
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Kim J, Yoo C, Seo S, Jeong J, Ryoo BY, Kim KP, Lee J, Lee KW, Kim JW, Kim IH, Kang M, Ryu H, Cheon J, Park S. 1690P A multicenter randomized phase II open label study to compare the safety and efficacy of direct oral anticoagulants versus subcutaneous dalteparin for cancer-associated venous thromboembolism in patients with advanced upper gastrointestinal, hepatobiliary and pancreatic cancer. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1662] [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: 11/29/2022] Open
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11
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Kim J, Choo M, Ryu H, Byun S, Lee S. Interpretation of uroflowmetrogram: Application with artificial intelligence. EUR UROL SUPPL 2020. [DOI: 10.1016/s2666-1683(20)33952-5] [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: 10/23/2022] Open
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12
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Hidayati N, Poon A, Willowson K, Eslick E, Ryu H, Bailey D. Evaluation of Kidney Dose in Neuroendocrine Tumors Patients after Peptide Receptor Radionuclide Therapy using 177Lu-DOTATATE. Atom Indo 2019. [DOI: 10.17146/aij.2019.910] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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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13
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Kim M, Hwang JY, Choo KS, Ryu H, Reid SNS, Kim YW, Kim TU, Kim JH. Comparison of image quality of abdominopelvic CT in paediatric patients: low osmolar contrast media versus less iodine-containing iso-osmolar contrast media at different peak kilovoltages. Clin Radiol 2019; 74:896.e9-896.e16. [PMID: 31431254 DOI: 10.1016/j.crad.2019.06.027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 06/21/2019] [Indexed: 10/26/2022]
Abstract
AIM To evaluate the effect of iso-osmolar contrast media (IOCM) at different tube voltages on image quality for abdominal computed tomography (CT) in paediatric patients. MATERIALS AND METHODS The low osmolar contrast media (LOCM) group and IOCM group consisted of 101 and 102 CT examinations, respectively, in patients <18 years old. Images were reviewed retrospectively. Objective measurement of the contrast enhancement and noise were analysed and contrast-to-noise ratios (CNRs) of the abdominal aorta, portal vein, and liver were calculated. Four radiologists participated in subjective analysis using a four-point scale system to evaluate degrees of contrast enhancement, image noise, beam-hardening artefact, and overall image quality. Reader performance for correctly differentiating the two kinds of contrast media was evaluated. RESULTS Regarding the objective measurement, contrast enhancement was significantly higher in the LOCM group (p<0.05). In subjective analysis, only CT using 120 kVp showed significantly stronger enhancement in the LOCM group (p=0.002), and sensitivity to differentiate the IOCM was 80.6%. Overall sensitivity and specificity for correctly differentiating IOCM were 57.1%, and 56.9%, respectively. CONCLUSION The application of IOCM was found to be feasible for performing paediatric abdominopelvic CT with a low tube voltage protocol. Although objective measurements of contrast enhancement were significantly lower in the IOCM group, subjective contrast enhancement and image quality assessments were not statistically different between groups.
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Affiliation(s)
- M Kim
- Department of Radiology, Pusan National University Yangsan Hospital, Geumo-ro 20, Yangsan-si, Gyeongsangnam-do, 50612, Republic of Korea
| | - J Y Hwang
- Department of Radiology, Pusan National University Yangsan Hospital, Geumo-ro 20, Yangsan-si, Gyeongsangnam-do, 50612, Republic of Korea; Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Geumo-ro 20, Yangsan-si, Gyeongsangnam-do, 50612, Republic of Korea.
| | - K S Choo
- Department of Radiology, Pusan National University Yangsan Hospital, Geumo-ro 20, Yangsan-si, Gyeongsangnam-do, 50612, Republic of Korea
| | - H Ryu
- Department of Radiology, Pusan National University Yangsan Hospital, Geumo-ro 20, Yangsan-si, Gyeongsangnam-do, 50612, Republic of Korea
| | - S N S Reid
- College of Creative Human Resource, School of Liberal Arts Education, Kyungsung University, Busan, 48434, Republic of Korea
| | - Y W Kim
- Department of Radiology, Pusan National University Yangsan Hospital, Geumo-ro 20, Yangsan-si, Gyeongsangnam-do, 50612, Republic of Korea
| | - T U Kim
- Department of Radiology, Pusan National University Yangsan Hospital, Geumo-ro 20, Yangsan-si, Gyeongsangnam-do, 50612, Republic of Korea
| | - J H Kim
- Department of Radiology, Pusan National University Yangsan Hospital, Geumo-ro 20, Yangsan-si, Gyeongsangnam-do, 50612, Republic of Korea
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14
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You JM, Kim TU, Kim S, Lee NK, Lee JW, Ryu H, Kim JH, Hong SB, Jeon TY, Park DY. Preoperative N stage evaluation in advanced gastric cancer patients using multidetector CT: can the sum of the diameters of metastatic LNs be used for N stage evaluation? Clin Radiol 2019; 74:782-789. [PMID: 31378300 DOI: 10.1016/j.crad.2019.06.030] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 06/28/2019] [Indexed: 12/23/2022]
Abstract
AIM To compare the diagnostic performance of total counts of metastatic lymph nodes (LN-sum) and conventional multidetector (MD) computed tomography (CT) staging in the nodal evaluation of advanced gastric cancer (AGC) patients. MATERIALS AND METHODS In total, 127 consecutive patients who underwent preoperative MDCT and gastrectomy for AGC were identified. Metastatic LNs on MDCT were defined as LNs with a short axis ≥8 mm, marked or heterogeneous enhancement, and morphological features (central necrosis, round shape, clustering). The sensitivity, specificity, accuracy, positive predictive value (PPV), and negative predictive value (NPV) of the N-stage using LN-sum and conventional MDCT staging were generated and compared. In addition, metastatic LN counts between the MDCT and the histopathological examinations and correlation between LN-sum and histopathological nodal status were analysed. RESULTS The total counts of metastatic LNs on MDCT was significantly smaller than those detected in histopathological assessments (p<0.0001). LN-sum showed significant correlation with the pathological N stage and the number of metastatic LNs (rho=0.69, 0.73, p<0.0001). The areas under the receiver operating characteristic curve were 0.896, and 0.835, for N stage ≥N2 and N3, with cut-off values of 12.5 and 23.5 mm, respectively. LN-sum provided better diagnostic performance than conventional MDCT staging for discriminating N0-2 versus N3; sensitivity, accuracy, PPV and NPV of LN-sum were significantly higher (80.4 versus 52.2%, 81.1 versus 68.5%, 71.2 versus 57.1%, and 88 versus 74.1%). CONCLUSION LN-sum may be sufficiently useful in assessing the N3 stage of AGC and may help to plan appropriate therapy for AGC patients.
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Affiliation(s)
- J M You
- Department of Radiology, Medical Research Institute, Pusan National University School of Medicine, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Gyeongsangnam-do, Republic of Korea
| | - T U Kim
- Department of Radiology, Medical Research Institute, Pusan National University School of Medicine, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Gyeongsangnam-do, Republic of Korea.
| | - S Kim
- Department of Radiology, Pusan National University Hospital, Pusan National University School of Medicine, Medical Research Institute, Busan, Republic of Korea
| | - N K Lee
- Department of Radiology, Pusan National University Hospital, Pusan National University School of Medicine, Medical Research Institute, Busan, Republic of Korea
| | - J W Lee
- Department of Radiology, Medical Research Institute, Pusan National University School of Medicine, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Gyeongsangnam-do, Republic of Korea
| | - H Ryu
- Department of Radiology, Medical Research Institute, Pusan National University School of Medicine, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Gyeongsangnam-do, Republic of Korea
| | - J H Kim
- Department of Radiology, Medical Research Institute, Pusan National University School of Medicine, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Gyeongsangnam-do, Republic of Korea
| | - S B Hong
- Department of Radiology, Pusan National University Hospital, Pusan National University School of Medicine, Medical Research Institute, Busan, Republic of Korea
| | - T Y Jeon
- Department of Surgery, Pusan National University Hospital, Pusan National University School of Medicine, Medical Research Institute, Busan, Republic of Korea
| | - D Y Park
- Department of Pathology, Pusan National University Hospital, Pusan National University School of Medicine, Medical Research Institute, Busan, Republic of Korea
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Park H, Ryu H, Kim H, Oh K, Oh Y, Lee K, Kim S, Kim Y, Ahn C. SUN-199 URINARY ANGIOTENSINOGEN TO CREATININE RATIO (UAGT/CR) IS NOT A PREDICTIVE BIOMARKER FOR RENAL PROGRESSION IN AUTOSOMAL DOMINANT POLYCYSTIC KIDNEY DISEASE: KNOW-CKD STUDY. Kidney Int Rep 2019. [DOI: 10.1016/j.ekir.2019.05.602] [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: 11/29/2022] Open
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16
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Lee MW, Kim N, Kim S, Joo M, Ryu H, Lee H. Chemokine receptor CXCR7 expression, function and clinical implications in head and neck squamous cell carcinoma. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy304.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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17
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Lee H, Lee KM, Han D, Ryu H. N-Myc and STAT interactor (NMI) as a key determinant of chemosensitivity in breast cancer: Proteomic-based computing network mapping and in vivo verification with a mouse model. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy304.013] [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: 11/13/2022] Open
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18
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Ryu H, Han D, Lee KM, Kim K. Proteomic-based machine learning computational analysis discovered biomarkers of aberrant vesicle-exosomal trafficking to determine chemotherapeutic responses in breast cancer. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy303.029] [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: 11/13/2022] Open
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19
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Ryu H, Galiguis J, Pham A, Le A. Blastocyst development and euploidy rate in single medium with continuous or renewal on day 3 using sibling embryos. Fertil Steril 2018. [DOI: 10.1016/j.fertnstert.2018.07.1008] [Citation(s) in RCA: 2] [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: 11/26/2022]
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20
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Lim B, Hwang M, Song JS, Ryu AJ, Joung B, Shim EB, Ryu H, Pak HN. 1008Effectiveness of atrial fibrillation rotor ablation is dependent on conduction velocity: an in-silico 3-dimensional modeling study. Europace 2018. [DOI: 10.1093/europace/euy015.557] [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: 11/14/2022] Open
Affiliation(s)
- B Lim
- Yonsei University , Seoul, Korea Republic of
| | - M Hwang
- Yonsei University , Seoul, Korea Republic of
| | - J S Song
- Yonsei University , Seoul, Korea Republic of
| | - A J Ryu
- Kangwon National University Hospital, Chuncheon, Korea Republic of
| | - B Joung
- Yonsei University , Seoul, Korea Republic of
| | - E B Shim
- Kangwon National University Hospital, Chuncheon, Korea Republic of
| | - H Ryu
- NVIDIA, Seoul, Korea Republic of
| | - H N Pak
- Yonsei University , Seoul, Korea Republic of
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21
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Lee H, Ryu H, Han D. High-throughput proteome identifies ANHAK as a novel biomarker for bladder urothelial carcinoma diagnosis in liquid-based cytology. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx653.004] [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: 11/12/2022] Open
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22
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Ryu H, Han D. Next generation proteomic profiling to predict the response to neoadjuvant chemotherapy in breast cancer. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx653.005] [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: 11/13/2022] Open
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23
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Lee S, Kim JY, Cheon S, Kim S, Kim D, Ryu H. Stimuli-responsive magneto-/electro-chromatic color-tunable hydrophobic surface modified Fe3O4@SiO2 core–shell nanoparticles for reflective display approaches. RSC Adv 2017. [DOI: 10.1039/c6ra27540k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Magneto-/electro-chromatic reflective color tunability is confirmed using hydrophobic surface modified magnetite nanoparticles. The optical reflective color spectra and color gamut demonstrate the promising applications in reflective displays.
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Affiliation(s)
- S. Lee
- Reality Display Device Research Section
- Electronics and Telecommunications Research Institute (ETRI)
- 34129 Daejeon
- Korea
- College of Electronics and Information Engineering
| | - J. Y. Kim
- Reality Display Device Research Section
- Electronics and Telecommunications Research Institute (ETRI)
- 34129 Daejeon
- Korea
| | - S. Cheon
- Reality Display Device Research Section
- Electronics and Telecommunications Research Institute (ETRI)
- 34129 Daejeon
- Korea
| | - S. Kim
- Reality Display Device Research Section
- Electronics and Telecommunications Research Institute (ETRI)
- 34129 Daejeon
- Korea
| | - D. Kim
- College of Electronics and Information Engineering
- Sejong University
- Gwangjin-gu
- Korea
| | - H. Ryu
- Reality Display Device Research Section
- Electronics and Telecommunications Research Institute (ETRI)
- 34129 Daejeon
- Korea
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24
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Ryu H, Song I, Choi Y, Baek S, Moon J, Lee H, Yun H, Kim S, Jo D. 337O The changes in the treatment of elderly AML patients in Korea: A single center experience. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw586.006] [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: 11/15/2022] Open
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25
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Ryu H, Han D, Kim J, Lee H. 555P Systems-wide bioinformatics analysis using next generation transcriptome and proteomics reveals nicotinamide transforms molecular signaling networks toward an antitumor growth: A novel anti-cancer agent in triple negative breast cancer. Ann Oncol 2016. [DOI: 10.1016/s0923-7534(21)00713-4] [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: 11/29/2022] Open
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26
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Moon J, Baek SW, Ryu H, Choi Y, Song IC, Yun HJ, Jo DY, Kim S, Lee H. 512P VIP (etoposide, ifosfamide, and cisplatin) in patients with previously treated soft tissue sarcoma. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw597.012] [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: 11/14/2022] Open
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27
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Moon J, Baek SW, Ryu H, Choi Y, Song IC, Yun HJ, Jo DY, Kim S, Lee H. 512P VIP (etoposide, ifosfamide, and cisplatin) in patients with previously treated soft tissue sarcoma. Ann Oncol 2016. [DOI: 10.1016/s0923-7534(21)00670-0] [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: 11/16/2022] Open
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28
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Ryu H, Han D, Kim J, Lee H. 555P Systems-wide bioinformatics analysis using next generation transcriptome and proteomics reveals nicotinamide transforms molecular signaling networks toward an anti-tumor growth: A novel anti-cancer agent in triple negative breast cancer. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw601.006] [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: 11/13/2022] Open
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29
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Inkinen J, Jayaprakash B, Santo Domingo J, Keinänen-Toivola M, Ryu H, Pitkänen T. Diversity of ribosomal 16S DNA- and RNA-based bacterial community in an office building drinking water system. J Appl Microbiol 2016; 120:1723-38. [DOI: 10.1111/jam.13144] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 01/27/2016] [Accepted: 02/01/2016] [Indexed: 12/14/2022]
Affiliation(s)
- J. Inkinen
- Faculty of Technology; WANDER Nordic Water and Materials Institute; Satakunta University of Applied Sciences; Rauma Finland
| | - B. Jayaprakash
- Water and Health Unit; National Institute for Health and Welfare (THL); Kuopio Finland
| | - J.W. Santo Domingo
- U.S. Environmental Protection Agency, Office of Research and Development; Cincinnati OH USA
| | - M.M. Keinänen-Toivola
- Faculty of Technology; WANDER Nordic Water and Materials Institute; Satakunta University of Applied Sciences; Rauma Finland
| | - H. Ryu
- U.S. Environmental Protection Agency, Office of Research and Development; Cincinnati OH USA
| | - T. Pitkänen
- Water and Health Unit; National Institute for Health and Welfare (THL); Kuopio Finland
- U.S. Environmental Protection Agency, Office of Research and Development; Cincinnati OH USA
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Ryu H, Lim G, Sung BH, Lee J. NMRe: a web server for NMR protein structure refinement with high-quality structure validation scores. Bioinformatics 2015; 32:611-3. [DOI: 10.1093/bioinformatics/btv595] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Accepted: 10/10/2015] [Indexed: 11/12/2022] Open
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31
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Ryu H, Cho A, Seong M, Park S, Lee J, Lim B, Kim K, Hwang Y, Chae J. Mutation spectrum of the dystrophin gene in 507 Korean Duchenne/Becker muscular dystrophy patients. Neuromuscul Disord 2015. [DOI: 10.1016/j.nmd.2015.06.254] [Citation(s) in RCA: 1] [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: 10/23/2022]
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32
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Ryu H, Lee J, Je S, Chung T. 233 Administration of Adipose-Derived Mesenchymal Stem Cells After Transient Global Cerebral Ischemia has an Additory Stimulating Effect on Intrinsic Neurogenesis. Ann Emerg Med 2015. [DOI: 10.1016/j.annemergmed.2015.07.266] [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: 11/26/2022]
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33
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Lee J, Ryu H, Keum G, Yoon YJ, Kowall NW, Ryu H. Therapeutic targeting of epigenetic components in amyotrophic lateral sclerosis (ALS). Curr Med Chem 2015; 21:3576-82. [PMID: 25005187 DOI: 10.2174/0929867321666140706131825] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Revised: 05/24/2014] [Accepted: 07/01/2014] [Indexed: 11/22/2022]
Abstract
Amyotrophic lateral sclerosis (ALS) is an adult-onset motor neuron disease characterized by degeneration of motor neuron and glial activation followed by the progressive muscle loss and paralysis. Numerous distinct therapeutic interventions have been examined but currently ALS does not have a cure or an efficacious treatment for the disorder. Glutamate- induced excitotoxicity, inflammation, mitochondrial dysfunction, oxidative stress, protein aggregation, transcription deregulation, and epigenetic modifications are associated with the pathogenesis of ALS and known to be therapeutic targets in ALS. In this review, we discuss translational pharmacological studies targeting epigenetic components to ameliorate ALS. Understanding of the epigenetic mechanisms will provide novel insights that will further identify potential biological markers and therapeutic approaches for treating ALS. A combination of treatments that modulate epigenetic components and multiple targets may prove to be the most effective therapy for ALS.
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Affiliation(s)
| | | | | | | | | | - H Ryu
- VA Boston Healthcare System and Department of Neurology, Boston University School of Medicine, 150 South Huntington Avenue, Boston, MA 02130; USA.
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Kwon JW, Park EJ, Jung SY, Sohn H, Ryu H, Suh H. A Large National Cohort Study of the Association between Bisphosphonates and Osteonecrosis of the Jaw in Patients with Osteoporosis. J Dent Res 2015; 94:212S-9S. [DOI: 10.1177/0022034515587862] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The purpose of this study was to examine the association between bisphosphonate exposure and osteonecrosis of the jaw (ONJ) in Korean patients with osteoporosis. A nested case-control study was performed using the claims database during 2002 to 2010 provided by the National Health Insurance Service. We identified a cohort of individuals with diagnosis of osteoporosis during 2002 to 2010. Cases and controls were identified during 2004 to 2010, and the date of potential cases of ONJ was defined as the index date. Bisphosphonate exposure was evaluated during 2 y prior to the index date. The association between bisphosphonate exposure and ONJ was tested by performing a conditional logistic regression analysis for matched data, and odds ratios (ORs) with 95% confidence intervals (CIs) were presented. Subjects were classified as nonuser, recent user, past user, or continuous user, depending on the prescription of bisphosphonates in 2 periods (1 to 2 y and 0 to 1 y prior to the index date). Continuous users were defined as patients who were exposed to bisphosphonate in both periods. We also examined the impact of bisphosphonate medication compliance by measuring the cumulative duration of exposure (CDE) on the risk of ONJ. A total of 212 cases with ONJ and 2,120 controls matched by sex, age, income level, and insurance type were identified among 109,787 patients with osteoporosis out of 1,025,340 enrollees in the sample cohort. The odds of having ONJ after adjusting for patient comorbidities significantly increased in continuous users of bisphosphonates (OR, 3.9; 95% CI, 2.4 to 6.2) compared to nonusers. Increased odds of ONJ were observed as CDE increased. The adjusted OR in patients with 1.5 y < CDE ≤ 2 y prior to the index date was 7.8 (95% CI, 4.0 to 15.5) versus nonusers. Our study results support significantly increased occurrences of potential ONJ in patients with osteoporosis who were exposed to bisphosphonates compared to those without exposure.
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Affiliation(s)
- J.-W. Kwon
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Kyungpook National University, Daegu, Korea
| | - E.-J. Park
- Korea Institute for Health and Social Affairs, Seoul, Korea
| | - S.-Y. Jung
- Office of Pharmacoepidemiology, Korea Institute of Drug Safety and Risk Management
| | - H.S. Sohn
- Graduate School of Clinical Pharmacy, CHA University, Gyeonggi-do, South Korea
| | - H. Ryu
- College of Natural Science, Kyungpook National University, Daegu, South Korea
| | - H.S. Suh
- College of Pharmacy, Pusan National University, Pusan, Korea
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Ryu H, Park I, Kim H, Jung Y. A novel potential prognostic marker SIRT1 on tumor invasion and metastasis, and tumor recurrence in triple negative breast cancer. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv117.15] [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: 11/12/2022] Open
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Abstract
One of the most conspicuous behavioural differences among great apes is the paucity of tool use among wild bonobos (Pan paniscus) in comparison to chimpanzees (Pan troglodytes) who are one of the most prolific and skilled tool users in the animal kingdom. This is in spite of the fact that bonobo tool use repertories are as large and diverse as chimpanzees’ in captive settings. In this study, we compared tool using behaviours and potential drivers of these behaviours in the Wamba bonobo population located in central Democratic Republic of Congo with the Goualougo chimpanzee population of northern Republic of Congo. The tool use repertoire of wild bonobos was comprised of only 13 behaviours, compared to 42 for chimpanzees. However, the number of tool behaviours observed in each study site was similar between bonobos and chimpanzees, and many types of tool use for social, self-grooming/stimulation, and comfort/protection functions were commonly used by both species. A marked difference is that 25 of 42 tool behaviours exhibited by chimpanzees are performed for feeding, in contrast to a single report of bonobos using a leaf sponge to drink water. We examined whether the differences in tool use repertoires can be explained by the necessity, opportunity, relative profitability, or invention hypotheses. We found that habitat composition and fluctuation of fruit production at these two sites were similar, particularly when compared with variation observed between sites within each species. Thus it was unlikely that the necessity hypothesis explains the lack of tool use for feeding in bonobos. Though further study at Wamba is needed, we did not identify any obvious differences in prey availability that would indicate differences in tool using opportunities between the sites. This study could not test the relative profitability hypothesis, and further research is needed on whether tool use is the most efficient means of calorie or protein intake for wild apes. Bonobos at Wamba formed much larger and stable parties than chimpanzees at Goualougo, which was contrary to the prediction by the invention hypothesis. Another explanation is that differences in tool use behaviour between bonobos and chimpanzees might not be explained by the current ecological or social conditions, but rather by circumstances during the Pleistocene Epoch. The observed species differences might also reflect divergent behavioural predispositions, rather than actual differences in cognitive abilities.
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Affiliation(s)
- T. Furuichi
- aPrimate Research Institute, Kyoto University, Inuyama, Aichi 484-5806, Japan
| | - C. Sanz
- bDepartment of Anthropology, Washington University, 1 Brookings Drive, Saint Louis, MO 63130, USA
- cCongo Program, Wildlife Conservation Society, B.P. 14537, Brazzaville, Republic of Congo
| | - K. Koops
- dDepartment of Archaeology and Anthropology, University of Cambridge, Fitzwilliam Street, Cambridge CB2 1QH, UK
| | - T. Sakamaki
- aPrimate Research Institute, Kyoto University, Inuyama, Aichi 484-5806, Japan
| | - H. Ryu
- aPrimate Research Institute, Kyoto University, Inuyama, Aichi 484-5806, Japan
| | - N. Tokuyama
- aPrimate Research Institute, Kyoto University, Inuyama, Aichi 484-5806, Japan
| | - D. Morgan
- cCongo Program, Wildlife Conservation Society, B.P. 14537, Brazzaville, Republic of Congo
- eLester E. Fisher Center for the Study and Conservation of Apes, Lincoln Park Zoo, North Clark Street, Chicago, IL 60614, USA
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Byun J, Son SM, Cha MY, Shong M, Hwang YJ, Kim Y, Ryu H, Moon M, Kim KS, Mook-Jung I. CR6-interacting factor 1 is a key regulator in Aβ-induced mitochondrial disruption and pathogenesis of Alzheimer's disease. Cell Death Differ 2014; 22:959-73. [PMID: 25361083 PMCID: PMC4423180 DOI: 10.1038/cdd.2014.184] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [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: 04/01/2014] [Revised: 08/25/2014] [Accepted: 09/25/2014] [Indexed: 12/13/2022] Open
Abstract
Mitochondrial dysfunction, often characterized by massive fission and other morphological abnormalities, is a well-known risk factor for Alzheimer's disease (AD). One causative mechanism underlying AD-associated mitochondrial dysfunction is thought to be amyloid-β (Aβ), yet the pathways between Aβ and mitochondrial dysfunction remain elusive. In this study, we report that CR6-interacting factor 1 (Crif1), a mitochondrial inner membrane protein, is a key player in Aβ-induced mitochondrial dysfunction. Specifically, we found that Crif1 levels were downregulated in the pathological regions of Tg6799 mice brains, wherein overexpressed Aβ undergoes self-aggregation. Downregulation of Crif1 was similarly observed in human AD brains as well as in SH-SY5Y cells treated with Aβ. In addition, knockdown of Crif1, using RNA interference, induced mitochondrial dysfunction with phenotypes similar to those observed in Aβ-treated cells. Conversely, Crif1 overexpression prevented Aβ-induced mitochondrial dysfunction and cell death. Finally, we show that Aβ-induced downregulation of Crif1 is mediated by enhanced reactive oxygen species (ROS) and ROS-dependent sumoylation of the transcription factor specificity protein 1 (Sp1). These results identify the ROS-Sp1-Crif1 pathway to be a new mechanism underlying Aβ-induced mitochondrial dysfunction and suggest that ROS-mediated downregulation of Crif1 is a crucial event in AD pathology. We propose that Crif1 may serve as a novel therapeutic target in the treatment of AD.
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Affiliation(s)
- J Byun
- Department of Biochemistry and Biomedical Sciences, Seoul National University College of Medicine, Seoul, Korea
| | - S M Son
- Department of Biochemistry and Biomedical Sciences, Seoul National University College of Medicine, Seoul, Korea
| | - M-Y Cha
- Department of Biochemistry and Biomedical Sciences, Seoul National University College of Medicine, Seoul, Korea
| | - M Shong
- Research Center for Endocrine and Metabolic Diseases, Chungnam National University School of Medicine, Daejeon, Korea
| | - Y J Hwang
- Center for Neuro-Medicine, Brain Science Institute, KIST, Seoul, Korea
| | - Y Kim
- Center for Neuro-Medicine, Brain Science Institute, KIST, Seoul, Korea
| | - H Ryu
- 1] Center for Neuro-Medicine, Brain Science Institute, KIST, Seoul, Korea [2] Department of Neurology and Pathology, Boston University School of Medicine, Boston, MA, USA
| | - M Moon
- Department of Psychiatry, McLean Hospital/Harvard Medical School, Belmont, MA, USA
| | - K-S Kim
- Department of Psychiatry, McLean Hospital/Harvard Medical School, Belmont, MA, USA
| | - I Mook-Jung
- Department of Biochemistry and Biomedical Sciences, Seoul National University College of Medicine, Seoul, Korea
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Nam S, Ryu H, Son WJ, Kim YH, Kim KT, Balch C, Nephew KP, Lee J. Mg2+ effect on argonaute and RNA duplex by molecular dynamics and bioinformatics implications. PLoS One 2014; 9:e109745. [PMID: 25330448 PMCID: PMC4201462 DOI: 10.1371/journal.pone.0109745] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Accepted: 09/10/2014] [Indexed: 12/25/2022] Open
Abstract
RNA interference (RNAi), mediated by small non-coding RNAs (e.g., miRNAs, siRNAs), influences diverse cellular functions. Highly complementary miRNA-target RNA (or siRNA-target RNA) duplexes are recognized by an Argonaute family protein (Ago2), and recent observations indicate that the concentration of Mg2+ ions influences miRNA targeting of specific mRNAs, thereby modulating miRNA-mRNA networks. In the present report, we studied the thermodynamic effects of differential [Mg2+] on slicing (RNA silencing cycle) through molecular dynamics simulation analysis, and its subsequent statistical analysis. Those analyses revealed different structural conformations of the RNA duplex in Ago2, depending on Mg2+ concentration. We also demonstrate that cation effects on Ago2 structural flexibility are critical to its catalytic/functional activity, with low [Mg2+] favoring greater Ago2 flexibility (e.g., greater entropy) and less miRNA/mRNA duplex stability, thus favoring slicing. The latter finding was supported by a negative correlation between expression of an Mg2+ influx channel, TRPM7, and one miRNA’s (miR-378) ability to downregulate its mRNA target, TMEM245. These results imply that thermodynamics could be applied to siRNA-based therapeutic strategies, using highly complementary binding targets, because Ago2 is also involved in RNAi slicing by exogenous siRNAs. However, the efficacy of a siRNA-based approach will differ, to some extent, based on the Mg2+ concentration even within the same disease type; therefore, different siRNA-based approaches might be considered for patient-to-patient needs.
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Affiliation(s)
- Seungyoon Nam
- Cancer Genomics Branch, National Cancer Center, Goyang, Kyunggi-do, Korea
| | - Hyojung Ryu
- Korean Bioinformation Center (KOBIC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, Korea
- Department of Bioinformatics, University of Sciences and Technology, Daejeon, Korea
| | - Won-joon Son
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina, United States of America
| | - Yon Hui Kim
- Next Therapeutics Branch, National Cancer Center, Goyang, Kyunggi-do, Korea
| | - Kyung Tae Kim
- Molecular Epidemiology Branch, National Cancer Center, Goyang, Kyunggi-do, Korea
| | - Curt Balch
- Bioscience Advising, Indianapolis, Indiana, United States of America
| | - Kenneth P. Nephew
- Medical Science Program, Indiana University School of Medicine, Bloomington, Indiana, United States of America
| | - Jinhyuk Lee
- Korean Bioinformation Center (KOBIC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, Korea
- Department of Bioinformatics, University of Sciences and Technology, Daejeon, Korea
- * E-mail:
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Abstract
The refinement of low-quality structures is an important challenge in protein structure prediction. Many studies have been conducted on protein structure refinement; the refinement of structures derived from NMR spectroscopy has been especially intensively studied. In this study, we generated flat-bottom distance potential instead of NOE data because NOE data have ambiguity and uncertainty. The potential was derived from distance information from given structures and prevented structural dislocation during the refinement process. A simulated annealing protocol was used to minimize the potential energy of the structure. The protocol was tested on 134 NMR structures in the Protein Data Bank (PDB) that also have X-ray structures. Among them, 50 structures were used as a training set to find the optimal "width" parameter in the flat-bottom distance potential functions. In the validation set (the other 84 structures), most of the 12 quality assessment scores of the refined structures were significantly improved (total score increased from 1.215 to 2.044). Moreover, the secondary structure similarity of the refined structure was improved over that of the original structure. Finally, we demonstrate that the combination of two energy potentials, statistical torsion angle potential (STAP) and the flat-bottom distance potential, can drive the refinement of NMR structures.
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Affiliation(s)
- Hyojung Ryu
- Korean Bioinformation Center (KOBIC), Korea Research Institute of Bioscience and Biotechnology, Daejeon, The Republic of Korea
- Department of Bioinformatics, University of Science and Technology, Daejeon, The Republic of Korea
| | - Tae-Rae Kim
- Department of Chemistry, Seoul National University, Seoul, The Republic of Korea
| | - SeonJoo Ahn
- Korean Bioinformation Center (KOBIC), Korea Research Institute of Bioscience and Biotechnology, Daejeon, The Republic of Korea
| | - Sunyoung Ji
- Korean Bioinformation Center (KOBIC), Korea Research Institute of Bioscience and Biotechnology, Daejeon, The Republic of Korea
- Department of Bioinformatics, University of Science and Technology, Daejeon, The Republic of Korea
| | - Jinhyuk Lee
- Korean Bioinformation Center (KOBIC), Korea Research Institute of Bioscience and Biotechnology, Daejeon, The Republic of Korea
- Department of Bioinformatics, University of Science and Technology, Daejeon, The Republic of Korea
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Cho YJ, Ryu H, Lee J, Park IK, Kim YT, Lee YH, Lee H, Hong DM, Seo JH, Bahk JH, Jeon Y. A randomised controlled trial comparing incentive spirometry with the Acapella
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device for physiotherapy after thoracoscopic lung resection surgery. Anaesthesia 2014; 69:891-8. [DOI: 10.1111/anae.12750] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/24/2014] [Indexed: 11/30/2022]
Affiliation(s)
- Y. J. Cho
- Department of Anaesthesiology and Pain Medicine Seoul National University Hospital Seoul South Korea
| | - H. Ryu
- Department of Anaesthesiology and Pain Medicine Seoul National University Hospital Seoul South Korea
| | - J. Lee
- Department of Anaesthesiology and Pain Medicine Seoul National University Hospital Seoul South Korea
| | - I. K. Park
- Department of Thoracic and Cardiovascular Surgery Seoul National University Hospital Seoul South Korea
| | - Y. T. Kim
- Department of Thoracic and Cardiovascular Surgery Seoul National University Hospital Seoul South Korea
| | - Y. H. Lee
- Department of Anaesthesiology and Pain Medicine Seoul National University Hospital Seoul South Korea
| | - H. Lee
- Department of Anaesthesiology and Pain Medicine Seoul National University Hospital Seoul South Korea
| | - D. M. Hong
- Department of Anaesthesiology and Pain Medicine Seoul National University Hospital Seoul South Korea
| | - J. H. Seo
- Department of Anaesthesiology and Pain Medicine Seoul National University Hospital Seoul South Korea
| | - J. H. Bahk
- Department of Anaesthesiology and Pain Medicine Seoul National University Hospital Seoul South Korea
| | - Y. Jeon
- Department of Anaesthesiology and Pain Medicine Seoul National University Hospital Seoul South Korea
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Zvyagin SA, Kamenskyi D, Ozerov M, Wosnitza J, Ikeda M, Fujita T, Hagiwara M, Smirnov AI, Soldatov TA, Shapiro AY, Krzystek J, Hu R, Ryu H, Petrovic C, Zhitomirsky ME. Direct determination of exchange parameters in Cs2CuBr4 and Cs2CuCl4: high-field electron-spin-resonance studies. Phys Rev Lett 2014; 112:077206. [PMID: 24579634 DOI: 10.1103/physrevlett.112.077206] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Indexed: 06/03/2023]
Abstract
Spin-1/2 Heisenberg antiferromagnets Cs2CuCl4 and Cs2CuBr4 with distorted triangular-lattice structures are studied by means of electron spin resonance spectroscopy in magnetic fields up to the saturation field and above. In the magnetically saturated phase, quantum fluctuations are fully suppressed, and the spin dynamics is defined by ordinary magnons. This allows us to accurately describe the magnetic excitation spectra in both materials and, using the harmonic spin-wave theory, to determine their exchange parameters. The viability of the proposed method was proven by applying it to Cs2CuCl4, yielding J/kB=4.7(2) K, J'/kB=1.42(7) K, [J'/J≃0.30] and revealing good agreement with inelastic neutron-scattering results. For the isostructural Cs2CuBr4, we obtain J/kB=14.9(7) K, J'/kB=6.1(3) K, [J'/J≃0.41], providing exact and conclusive information on the exchange couplings in this frustrated spin system.
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Affiliation(s)
- S A Zvyagin
- Dresden High Magnetic Field Laboratory (HLD), Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
| | - D Kamenskyi
- Dresden High Magnetic Field Laboratory (HLD), Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
| | - M Ozerov
- Dresden High Magnetic Field Laboratory (HLD), Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
| | - J Wosnitza
- Dresden High Magnetic Field Laboratory (HLD), Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany and Institüt fur Festkörperphysik, TU Dresden, 01068 Dresden, Germany
| | - M Ikeda
- KYOKUGEN, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - T Fujita
- KYOKUGEN, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - M Hagiwara
- KYOKUGEN, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - A I Smirnov
- P.L. Kapitza Institute for Physical Problems, RAS, 119334 Moscow, Russia
| | - T A Soldatov
- Moscow Institute for Physics and Technology, 141700 Dolgoprudnyi, Russia
| | - A Ya Shapiro
- A.V. Shubnikov Institute of Crystallography, RAS, 119333, Moscow, Russia
| | - J Krzystek
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, USA
| | - R Hu
- Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - H Ryu
- Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA and Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794-3800, USA
| | - C Petrovic
- Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA and Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794-3800, USA
| | - M E Zhitomirsky
- Service de Physique Statistique, Magnétisme et Supraconductivité, UMR-E9001 CEA-INAC/UJF, 38054 Grenoble Cedex 9, France
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Shin JH, Ryu H, Jang S, Kim S. Task-specific interactive game-based virtual reality rehabilitation system for stroke patients: A usability test and two clinical experiments. J Neurol Sci 2013. [DOI: 10.1016/j.jns.2013.07.1992] [Citation(s) in RCA: 1] [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: 10/26/2022]
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Kong T, Lee J, Paek J, Chang S, Chang K, Ryu H. Comparison of laparoscopic versus abdominal radical hysterectomy for bulky (≥3cm) FIGO stage IB and IIA cervical cancer. Gynecol Oncol 2013. [DOI: 10.1016/j.ygyno.2013.04.185] [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: 10/26/2022]
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44
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Kong T, Son J, Paek J, Chang S, Chang K, Ryu H. Outcomes of cold knife conization according to the margin involvement in high-grade lesions and microinvasive squamous cell carcinoma of the uterine cervix. Gynecol Oncol 2013. [DOI: 10.1016/j.ygyno.2013.04.187] [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: 10/26/2022]
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45
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Abstract
Mitochondrial dysfunction and synaptic damage are critical early features of Alzheimer's disease (AD) associated with amyloid β (Aβ) and τ. We previously reported that the scaffolding protein RanBP9, which is overall increased in AD, simultaneously promotes Aβ generation and focal adhesion disruption by accelerating the endocytosis of APP and β1-integrin, respectively. Moreover, RanBP9 induces neurodegeneration in vitro and in vivo and mediates Aβ-induced neurotoxicity. However, little is known regarding the mechanisms underlying such neurotoxic processes. Here, we show that RanBP9 induces the loss of mitochondrial membrane potential and increase in mitochondrial superoxides associated with decrease in Bcl-2, increase in Bax protein and oligomerization, fragmentation of mitochondria, and cytochrome c release. RanBP9-induced neurotoxic changes are significantly prevented by the mitochondrial fission inhibitor Mdivi-1 and by classical inhibitors of the mitochondrial apoptosis, XIAP, Bcl-2, and Bcl-xl. RanBP9 physically interacts with the tumor suppressor p73 and increases endogenous p73α levels at both transcriptional and post-translational levels;moreover, the knockdown of endogenous p73 by siRNA effectively blocks RanBP9 and Aβ1-42-induced mitochondria-mediated cell death. Conversely, siRNA knockdown of endogenous RanBP9 also suppresses p73-induced apoptosis, suggesting that RanBP9 and p73 have cooperative roles in inducing cell death. Taken together, these finding implicate the RanBP9/p73 complex in mitochondria-mediated apoptosis in addition to its role in enhancing Aβ generation.
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Affiliation(s)
- T Liu
- WCU-Neurocytomics Program, Seoul National University College of Medicine, Seoul, Korea
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46
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Song H, Boo JH, Kim KH, Kim C, Kim YE, Ahn JH, Jeon GS, Ryu H, Kang DE, Mook-Jung I. Critical role of presenilin-dependent γ-secretase activity in DNA damage-induced promyelocytic leukemia protein expression and apoptosis. Cell Death Differ 2013; 20:639-48. [PMID: 23306558 DOI: 10.1038/cdd.2012.162] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Promyelocytic leukemia (PML) is a major component of macromolecular multiprotein complexes called PML nuclear-bodies (PML-NBs). These PML-NBs recruit numerous proteins including CBP, p53 and HIPK2 in response to DNA damage, senescence and apoptosis. In this study, we investigated the effect of presenilin (PS), the main component of the γ-secretase complex, in PML/p53 expression and downstream consequences during DNA damage-induced cell death using camptothecin (CPT). We found that the loss of PS in PS knockout (KO) MEFs (mouse embryonic fibroblasts) results in severely blunted PML expression and attenuated cell death upon CPT exposure, a phenotype that is fully reversed by re-expression of PS1 in PS KO cells and recapitulated by γ-secretase inhibitors in hPS1 MEFs. Interestingly, the γ-secretase cleavage product, APP intracellular domain (AICD), together with Fe65-induced PML expression at the protein and transcriptional levels in PS KO cells. PML and p53 reciprocally positively regulated each other during CPT-induced DNA damage, both of which were dependent on PS. Finally, elevated levels of PML-NB, PML protein and PML mRNA were detected in the brain tissues from Alzheimer's disease (AD) patients, where γ-secretase activity is essential for pathogenesis. Our data provide for the first time, a critical role of the PS/AICD-PML/p53 pathway in DNA damage-induced apoptosis, and implicate this pathway in AD pathogenesis.
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Affiliation(s)
- H Song
- Department of Biochemistry and Biomedical Sciences, WCU neurocytomics, College of Medicine, Seoul National University, Seoul, Korea
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Lee H, Lee K, Ryu H, Song I, Huang S, Yun H, Kim J, Jo D, Kim S. The Combined Expression of CXCR7 and its Ligand CXCL12 is a Marker for Unfavorable Prognosis in Gastric Cancer. Ann Oncol 2012. [DOI: 10.1093/annonc/mds418] [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: 11/14/2022] Open
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48
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Kim K, Kim J, Ryu H, Bedikian A, Papadopolous N, Hwu P, Hwu W, Patel S. Increased Incidence of Renal Cell Carcinoma (RCC) Among Melanoma Patients. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)33941-7] [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: 10/25/2022] Open
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49
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Han QF, Jeong YI, Heo JH, Shin CM, Ryu H, Park MS, Lee WJ, Yoon JH, Yang JE, Choi H. Magnesium-doped zinc oxide electrochemically grown on fluorine-doped tin oxide substrate. J Nanosci Nanotechnol 2012; 12:3677-3681. [PMID: 22849195 DOI: 10.1166/jnn.2012.5634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Nanostructures of magnesium (Mg) doped Zinc oxide (ZnO) were successfully deposited on conducting fluorine-doped tin oxide (FTO) coated glass plates by cathodic electrochemical deposition method at different potentials and temperature conditions. The deposited samples were characterized by XRD and SEM techniques to confirm their structures, morphologies and optical properties. These measurements show that Mg doped ZnO has a wurtzite structure and that the strongest intensity of the (002) peak is found at 60 degrees C and -1.0 V. Tunable transmittance of Mg doped ZnO has a band gap energy from 3.45 eV to 3.82 eV, which is the direct evidence of doping.
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Affiliation(s)
- Q F Han
- Department of Nano Systems Engineering, Center for Nano Manufacturing Inje University, Gyeongnam 621-749, Korea
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50
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Chang S, Bristow R, Kong T, Paek J, Ryu H, DiSaia P. A model for prediction of parametrial involvement and feasibility of less radical resection of parametrium in patients with FIGO stage IB1 cervical cancer. Gynecol Oncol 2012. [DOI: 10.1016/j.ygyno.2011.12.114] [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: 10/28/2022]
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