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Effects of empagliflozin on progression of chronic kidney disease: a prespecified secondary analysis from the empa-kidney trial. Lancet Diabetes Endocrinol 2024; 12:39-50. [PMID: 38061371 PMCID: PMC7615591 DOI: 10.1016/s2213-8587(23)00321-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 12/23/2023]
Abstract
BACKGROUND Sodium-glucose co-transporter-2 (SGLT2) inhibitors reduce progression of chronic kidney disease and the risk of cardiovascular morbidity and mortality in a wide range of patients. However, their effects on kidney disease progression in some patients with chronic kidney disease are unclear because few clinical kidney outcomes occurred among such patients in the completed trials. In particular, some guidelines stratify their level of recommendation about who should be treated with SGLT2 inhibitors based on diabetes status and albuminuria. We aimed to assess the effects of empagliflozin on progression of chronic kidney disease both overall and among specific types of participants in the EMPA-KIDNEY trial. METHODS EMPA-KIDNEY, a randomised, controlled, phase 3 trial, was conducted at 241 centres in eight countries (Canada, China, Germany, Italy, Japan, Malaysia, the UK, and the USA), and included individuals aged 18 years or older with an estimated glomerular filtration rate (eGFR) of 20 to less than 45 mL/min per 1·73 m2, or with an eGFR of 45 to less than 90 mL/min per 1·73 m2 with a urinary albumin-to-creatinine ratio (uACR) of 200 mg/g or higher. We explored the effects of 10 mg oral empagliflozin once daily versus placebo on the annualised rate of change in estimated glomerular filtration rate (eGFR slope), a tertiary outcome. We studied the acute slope (from randomisation to 2 months) and chronic slope (from 2 months onwards) separately, using shared parameter models to estimate the latter. Analyses were done in all randomly assigned participants by intention to treat. EMPA-KIDNEY is registered at ClinicalTrials.gov, NCT03594110. FINDINGS Between May 15, 2019, and April 16, 2021, 6609 participants were randomly assigned and then followed up for a median of 2·0 years (IQR 1·5-2·4). Prespecified subgroups of eGFR included 2282 (34·5%) participants with an eGFR of less than 30 mL/min per 1·73 m2, 2928 (44·3%) with an eGFR of 30 to less than 45 mL/min per 1·73 m2, and 1399 (21·2%) with an eGFR 45 mL/min per 1·73 m2 or higher. Prespecified subgroups of uACR included 1328 (20·1%) with a uACR of less than 30 mg/g, 1864 (28·2%) with a uACR of 30 to 300 mg/g, and 3417 (51·7%) with a uACR of more than 300 mg/g. Overall, allocation to empagliflozin caused an acute 2·12 mL/min per 1·73 m2 (95% CI 1·83-2·41) reduction in eGFR, equivalent to a 6% (5-6) dip in the first 2 months. After this, it halved the chronic slope from -2·75 to -1·37 mL/min per 1·73 m2 per year (relative difference 50%, 95% CI 42-58). The absolute and relative benefits of empagliflozin on the magnitude of the chronic slope varied significantly depending on diabetes status and baseline levels of eGFR and uACR. In particular, the absolute difference in chronic slopes was lower in patients with lower baseline uACR, but because this group progressed more slowly than those with higher uACR, this translated to a larger relative difference in chronic slopes in this group (86% [36-136] reduction in the chronic slope among those with baseline uACR <30 mg/g compared with a 29% [19-38] reduction for those with baseline uACR ≥2000 mg/g; ptrend<0·0001). INTERPRETATION Empagliflozin slowed the rate of progression of chronic kidney disease among all types of participant in the EMPA-KIDNEY trial, including those with little albuminuria. Albuminuria alone should not be used to determine whether to treat with an SGLT2 inhibitor. FUNDING Boehringer Ingelheim and Eli Lilly.
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T, Tamori Y, Tamura R, Tamura Y, Tan CHH, Tan EZZ, Tanabe A, Tanabe K, Tanaka A, Tanaka A, Tanaka N, Tang S, Tang Z, Tanigaki K, Tarlac M, Tatsuzawa A, Tay JF, Tay LL, Taylor J, Taylor K, Taylor K, Te A, Tenbusch L, Teng KS, Terakawa A, Terry J, Tham ZD, Tholl S, Thomas G, Thong KM, Tietjen D, Timadjer A, Tindall H, Tipper S, Tobin K, Toda N, Tokuyama A, Tolibas M, Tomita A, Tomita T, Tomlinson J, Tonks L, Topf J, Topping S, Torp A, Torres A, Totaro F, Toth P, Toyonaga Y, Tripodi F, Trivedi K, Tropman E, Tschope D, Tse J, Tsuji K, Tsunekawa S, Tsunoda R, Tucky B, Tufail S, Tuffaha A, Turan E, Turner H, Turner J, Turner M, Tuttle KR, Tye YL, Tyler A, Tyler J, Uchi H, Uchida H, Uchida T, Uchida T, Udagawa T, Ueda S, Ueda Y, Ueki K, Ugni S, Ugwu E, Umeno R, Unekawa C, Uozumi K, Urquia K, Valleteau A, Valletta C, van Erp R, Vanhoy C, Varad V, Varma R, Varughese A, Vasquez P, Vasseur A, Veelken R, Velagapudi C, Verdel K, Vettoretti S, Vezzoli G, Vielhauer V, Viera R, Vilar E, Villaruel S, Vinall L, Vinathan J, Visnjic M, Voigt E, von-Eynatten M, Vourvou M, Wada J, Wada J, Wada T, Wada Y, Wakayama K, Wakita Y, Wallendszus K, Walters T, Wan Mohamad WH, Wang L, Wang W, Wang X, Wang X, Wang Y, Wanner C, Wanninayake S, Watada H, Watanabe K, Watanabe K, Watanabe M, Waterfall H, Watkins D, Watson S, Weaving L, Weber B, Webley Y, Webster A, Webster M, Weetman M, Wei W, Weihprecht H, Weiland L, Weinmann-Menke J, Weinreich T, Wendt R, Weng Y, Whalen M, Whalley G, Wheatley R, Wheeler A, Wheeler J, Whelton P, White K, Whitmore B, Whittaker S, Wiebel J, Wiley J, Wilkinson L, Willett M, Williams A, Williams E, Williams K, Williams T, Wilson A, Wilson P, Wincott L, Wines E, Winkelmann B, Winkler M, Winter-Goodwin B, Witczak J, Wittes J, Wittmann M, Wolf G, Wolf L, Wolfling R, Wong C, Wong E, Wong HS, Wong LW, Wong YH, Wonnacott A, Wood A, Wood L, Woodhouse H, Wooding N, Woodman A, Wren K, Wu J, Wu P, Xia S, Xiao H, Xiao X, Xie Y, Xu C, Xu Y, Xue H, Yahaya H, Yalamanchili H, Yamada A, Yamada N, Yamagata K, Yamaguchi M, Yamaji Y, Yamamoto A, Yamamoto S, Yamamoto S, Yamamoto T, Yamanaka A, Yamano T, Yamanouchi Y, Yamasaki N, Yamasaki Y, Yamasaki Y, Yamashita C, Yamauchi T, Yan Q, Yanagisawa E, Yang F, Yang L, Yano S, Yao S, Yao Y, Yarlagadda S, Yasuda Y, Yiu V, Yokoyama T, Yoshida S, Yoshidome E, Yoshikawa H, Young A, Young T, Yousif V, Yu H, Yu Y, Yuasa K, Yusof N, Zalunardo N, Zander B, Zani R, Zappulo F, Zayed M, Zemann B, Zettergren P, Zhang H, Zhang L, Zhang L, Zhang N, Zhang X, Zhao J, Zhao L, Zhao S, Zhao Z, Zhong H, Zhou N, Zhou S, Zhu D, Zhu L, Zhu S, Zietz M, Zippo M, Zirino F, Zulkipli FH. Impact of primary kidney disease on the effects of empagliflozin in patients with chronic kidney disease: secondary analyses of the EMPA-KIDNEY trial. Lancet Diabetes Endocrinol 2024; 12:51-60. [PMID: 38061372 DOI: 10.1016/s2213-8587(23)00322-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 12/23/2023]
Abstract
BACKGROUND The EMPA-KIDNEY trial showed that empagliflozin reduced the risk of the primary composite outcome of kidney disease progression or cardiovascular death in patients with chronic kidney disease mainly through slowing progression. We aimed to assess how effects of empagliflozin might differ by primary kidney disease across its broad population. METHODS EMPA-KIDNEY, a randomised, controlled, phase 3 trial, was conducted at 241 centres in eight countries (Canada, China, Germany, Italy, Japan, Malaysia, the UK, and the USA). Patients were eligible if their estimated glomerular filtration rate (eGFR) was 20 to less than 45 mL/min per 1·73 m2, or 45 to less than 90 mL/min per 1·73 m2 with a urinary albumin-to-creatinine ratio (uACR) of 200 mg/g or higher at screening. They were randomly assigned (1:1) to 10 mg oral empagliflozin once daily or matching placebo. Effects on kidney disease progression (defined as a sustained ≥40% eGFR decline from randomisation, end-stage kidney disease, a sustained eGFR below 10 mL/min per 1·73 m2, or death from kidney failure) were assessed using prespecified Cox models, and eGFR slope analyses used shared parameter models. Subgroup comparisons were performed by including relevant interaction terms in models. EMPA-KIDNEY is registered with ClinicalTrials.gov, NCT03594110. FINDINGS Between May 15, 2019, and April 16, 2021, 6609 participants were randomly assigned and followed up for a median of 2·0 years (IQR 1·5-2·4). Prespecified subgroupings by primary kidney disease included 2057 (31·1%) participants with diabetic kidney disease, 1669 (25·3%) with glomerular disease, 1445 (21·9%) with hypertensive or renovascular disease, and 1438 (21·8%) with other or unknown causes. Kidney disease progression occurred in 384 (11·6%) of 3304 patients in the empagliflozin group and 504 (15·2%) of 3305 patients in the placebo group (hazard ratio 0·71 [95% CI 0·62-0·81]), with no evidence that the relative effect size varied significantly by primary kidney disease (pheterogeneity=0·62). The between-group difference in chronic eGFR slopes (ie, from 2 months to final follow-up) was 1·37 mL/min per 1·73 m2 per year (95% CI 1·16-1·59), representing a 50% (42-58) reduction in the rate of chronic eGFR decline. This relative effect of empagliflozin on chronic eGFR slope was similar in analyses by different primary kidney diseases, including in explorations by type of glomerular disease and diabetes (p values for heterogeneity all >0·1). INTERPRETATION In a broad range of patients with chronic kidney disease at risk of progression, including a wide range of non-diabetic causes of chronic kidney disease, empagliflozin reduced risk of kidney disease progression. Relative effect sizes were broadly similar irrespective of the cause of primary kidney disease, suggesting that SGLT2 inhibitors should be part of a standard of care to minimise risk of kidney failure in chronic kidney disease. FUNDING Boehringer Ingelheim, Eli Lilly, and UK Medical Research Council.
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Chang T, Akin S, Cho S, Lee J, Lee SA, Park T, Hong S, Yu T, Ji Y, Yi J, Gong SL, Kim DR, Kim YL, Jun MBG, Lee CH. In Situ Spray Polymerization of Conductive Polymers for Personalized E-textiles. ACS Nano 2023; 17:22733-22743. [PMID: 37933955 DOI: 10.1021/acsnano.3c07283] [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] [Subscribe] [Scholar Register] [Indexed: 11/08/2023]
Abstract
E-textiles, also known as electronic textiles, seamlessly merge wearable technology with fabrics, offering comfort and unobtrusiveness and establishing a crucial role in health monitoring systems. In this field, the integration of custom sensor designs with conductive polymers into various fabric types, especially in large areas, has presented significant challenges. Here, we present an innovative additive patterning method that utilizes a dual-regime spray system, eliminating the need for masks and allowing for the programmable inscription of sensor arrays onto consumer textiles. Unlike traditional spray techniques, this approach enables in situ, on-the-fly polymerization of conductive polymers, enabling intricate designs with submillimeter resolution across fabric areas spanning several meters. Moreover, it addresses the nozzle clogging issues commonly encountered in such applications. The resulting e-textiles preserve essential fabric characteristics such as breathability, wearability, and washability while delivering exceptional sensing performance. A comprehensive investigation, combining experimental, computational, and theoretical approaches, was conducted to examine the critical factors influencing the operation of the dual-regime spraying system and its role in e-textile fabrication. These findings provide a flexible solution for producing e-textiles on consumer fabric items and hold significant implications for a diverse range of wearable sensing applications.
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Affiliation(s)
- Taehoo Chang
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Semih Akin
- School of Mechanical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Seungse Cho
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Junsang Lee
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Seul Ah Lee
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Taewoong Park
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Seokkyoon Hong
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Tianhao Yu
- School of Mechanical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Yuhyun Ji
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Jonghun Yi
- School of Mechanical Engineering, Hanyang University, Seoul 04763, South Korea
| | - Sunland L Gong
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
- School of Medicine, Indiana University, Indianapolis, Indiana 46202, United States
| | - Dong Rip Kim
- School of Mechanical Engineering, Hanyang University, Seoul 04763, South Korea
| | - Young L Kim
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Martin Byung-Guk Jun
- School of Mechanical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Chi Hwan Lee
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
- School of Mechanical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
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Lee SA, Compton A, McGuirk G, Franciosa T, Foley MP, Kennelly MM, Turner MJ. Medical and social needs of pregnant asylum-seekers in Direct Provision. Ir Med J 2023; 116:808. [PMID: 37606235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 08/23/2023]
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Lee SA, Han SH, Jang JY, Park BR, Kim CS. Chondroprotective Effects of Ulva prolifera on Osteoarthritis through MAPKs Signaling Inhibition. Prev Nutr Food Sci 2023; 28:43-49. [PMID: 37066028 PMCID: PMC10103602 DOI: 10.3746/pnf.2023.28.1.43] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 01/28/2023] [Accepted: 02/10/2023] [Indexed: 04/03/2023] Open
Abstract
Osteoarthritis (OA) is a typical degenerative disease that mainly appears in the elderly aged 65 and over. OA is characterized by inflammation and decomposition of the cartilage matrix due to irreversible wear and tear. Ulva prolifera, a green macroalgae species, contains polysaccharides, amino acids, polyunsaturated fatty acids, and polyphenols, which are major active components responsible for anti-inflammatory and antioxidant effects. This study evaluated the chondro-protective effect of 30% prethanol extract of U. prolifera (30% PeUP). Rat primary chondrocytes were pre-treated with 30% PeUP for 1 h before interleukin-1β (10 ng/mL) stimulation. The production of nitrite, prostaglandin E2 (PGE2), collagen type II (Col II), and aggrecan (ACAN) were detected by Griess reagent and enzyme-linked immunosorbent assay. The protein expression levels of inducible nitric oxide synthase (iNOS), cyclooxygenase (COX)-2, matrix metalloproteinase (MMP)-1, MMP-3, MMP-13, a disintegrin and metalloproteinase with thrombospondin (ADAMTS)-4, ADAMTS-5, and mitogen-activated protein kinases (MAPKs) (extracellular signal-regulated kinase 1/2, c-Jun N-terminal kinase, and p38) were assessed by western blot. Thirty percent of PeUP significantly inhibited the expression of nitrite, iNOS, PGE2, COX-2, MMP-1, MMP-3, MMP-13, ADMATS-4, and ADMATS-5 in interleukin (IL)-1β-stimulated chondrocytes. Moreover, 30% PeUP decreased the IL-1β-induced degradation of Col II and ACAN. Additionally, 30% of PeUP suppressed IL-1β-induced phosphorylation of MAPKs. Therefore, 30% PeUP is a potential therapeutic agent to mitigate OA progression.
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Affiliation(s)
- Seul Ah Lee
- Marine Healthcare Research and Evaluation Center, Chosun University, Jeonnam 59146, Korea
| | - Seul Hee Han
- Marine Healthcare Research and Evaluation Center, Chosun University, Jeonnam 59146, Korea
| | - Ji Yun Jang
- Marine Healthcare Research and Evaluation Center, Chosun University, Jeonnam 59146, Korea
| | - Bo-Ram Park
- Department of Dental Hygiene, College of Health and Welfare, Kyungwoon University, Gyeongbuk 39160, Korea
| | - Chun Sung Kim
- Marine Healthcare Research and Evaluation Center, Chosun University, Jeonnam 59146, Korea
- Department of Oral Biochemistry, College of Dentistry, Chosun University, Gwangju 61452, Korea
- Correspondence to Chun Sung Kim, E-mail:
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Burke DA, Jeong H, Wu B, Lee SA, Floeder JR, Namboodiri VMK. Few-shot learning: temporal scaling in behavioral and dopaminergic learning. bioRxiv 2023:2023.03.31.535173. [PMID: 37034619 PMCID: PMC10081323 DOI: 10.1101/2023.03.31.535173] [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] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
How do we learn associations in the world (e.g., between cues and rewards)? Cue-reward associative learning is controlled in the brain by mesolimbic dopamine1-4. It is widely believed that dopamine drives such learning by conveying a reward prediction error (RPE) in accordance with temporal difference reinforcement learning (TDRL) algorithms5. TDRL implementations are "trial-based": learning progresses sequentially across individual cue-outcome experiences. Accordingly, a foundational assumption-often considered a mere truism-is that the more cue-reward pairings one experiences, the more one learns this association. Here, we disprove this assumption, thereby falsifying a foundational principle of trial-based learning algorithms. Specifically, when a group of head-fixed mice received ten times fewer experiences over the same total time as another, a single experience produced as much learning as ten experiences in the other group. This quantitative scaling also holds for mesolimbic dopaminergic learning, with the increase in learning rate being so high that the group with fewer experiences exhibits dopaminergic learning in as few as four cue-reward experiences and behavioral learning in nine. An algorithm implementing reward-triggered retrospective learning explains these findings. The temporal scaling and few-shot learning observed here fundamentally changes our understanding of the neural algorithms of associative learning.
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Affiliation(s)
- Dennis A Burke
- Department of Neurology, University of California, San Francisco, CA, USA
| | - Huijeong Jeong
- Department of Neurology, University of California, San Francisco, CA, USA
| | - Brenda Wu
- Department of Neurology, University of California, San Francisco, CA, USA
| | - Seul Ah Lee
- Department of Neurology, University of California, San Francisco, CA, USA
- University of California, Berkeley, CA, USA
| | - Joseph R Floeder
- Neuroscience Graduate Program, University of California, San Francisco, CA, USA
| | - Vijay Mohan K Namboodiri
- Department of Neurology, University of California, San Francisco, CA, USA
- Neuroscience Graduate Program, University of California, San Francisco, CA, USA
- Weill Institute for Neurosciences, Kavli Institute for Fundamental Neuroscience, Center for Integrative Neuroscience, University of California, San Francisco, CA, USA
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Budhram-Mahadeo VS, Irshad S, Bowen S, Lee SA, Samady L, Tonini GP, Latchman DS. Correction: Proliferation-associated Brn-3b transcription factor can activate cyclin D1 expression in neuroblastoma and breast cancer cells. Oncogene 2023; 42:782. [PMID: 36759573 DOI: 10.1038/s41388-023-02614-9] [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: 02/11/2023]
Affiliation(s)
- V S Budhram-Mahadeo
- Medical Molecular Biology Unit, Institute of Child Health, University College London, London, UK.
| | - S Irshad
- Medical Molecular Biology Unit, Institute of Child Health, University College London, London, UK
| | - S Bowen
- Medical Molecular Biology Unit, Institute of Child Health, University College London, London, UK
| | - S A Lee
- Medical Molecular Biology Unit, Institute of Child Health, University College London, London, UK
| | - L Samady
- Medical Molecular Biology Unit, Institute of Child Health, University College London, London, UK
| | - G P Tonini
- Translational Paediatric Oncology, National Institute of Cancer Research (IST), Genoa, Italy
| | - D S Latchman
- Medical Molecular Biology Unit, Institute of Child Health, University College London, London, UK
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Zhang J, Kim K, Kim HJ, Meyer D, Park W, Lee SA, Dai Y, Kim B, Moon H, Shah JV, Harris KE, Collar B, Liu K, Irazoqui P, Lee H, Park SA, Kollbaum PS, Boudouris BW, Lee CH. Smart soft contact lenses for continuous 24-hour monitoring of intraocular pressure in glaucoma care. Nat Commun 2022; 13:5518. [PMID: 36127347 PMCID: PMC9489713 DOI: 10.1038/s41467-022-33254-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [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: 02/25/2022] [Accepted: 09/09/2022] [Indexed: 11/09/2022] Open
Abstract
Continuous monitoring of intraocular pressure, particularly during sleep, remains a grand challenge in glaucoma care. Here we introduce a class of smart soft contact lenses, enabling the continuous 24-hour monitoring of intraocular pressure, even during sleep. Uniquely, the smart soft contact lenses are built upon various commercial brands of soft contact lenses without altering their intrinsic properties such as lens power, biocompatibility, softness, transparency, wettability, oxygen transmissibility, and overnight wearability. We show that the smart soft contact lenses can seamlessly fit across different corneal curvatures and thicknesses in human eyes and therefore accurately measure absolute intraocular pressure under ambulatory conditions. We perform a comprehensive set of in vivo evaluations in rabbit, dog, and human eyes from normal to hypertension to confirm the superior measurement accuracy, within-subject repeatability, and user comfort of the smart soft contact lenses beyond current wearable ocular tonometers. We envision that the smart soft contact lenses will be effective in glaucoma care.
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Affiliation(s)
- Jinyuan Zhang
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
| | - Kyunghun Kim
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
| | - Ho Joong Kim
- Charles D. Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, USA
| | - Dawn Meyer
- School of Optometry, Indiana University, Bloomington, IN, USA
| | - Woohyun Park
- School of Mechanical Engineering, Purdue University, West Lafayette, IN, USA
| | - Seul Ah Lee
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
| | - Yumin Dai
- School of Materials Engineering, Purdue University, West Lafayette, IN, USA
| | - Bongjoong Kim
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA.,Department of Mechanical and System Design Engineering, Hongik University, Seoul, 04066, Republic of Korea
| | - Haesoo Moon
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
| | - Jay V Shah
- Elmore Family School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN, USA
| | - Keely E Harris
- Department of Veterinary Clinical Sciences, Purdue University, West Lafayette, IN, USA
| | - Brett Collar
- Department of Electrical and Computer Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Kangying Liu
- Department of Chemistry, Purdue University, West Lafayette, IN, USA
| | - Pedro Irazoqui
- Department of Electrical and Computer Engineering, Johns Hopkins University, Baltimore, MD, USA
| | - Hyowon Lee
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA.,Center for Implantable Devices, Purdue University, West Lafayette, IN, USA.,Birck Nanotechnology Center, Purdue University, West Lafayette, IN, USA
| | - Shin Ae Park
- Department of Veterinary Clinical Sciences, Purdue University, West Lafayette, IN, USA.
| | - Pete S Kollbaum
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA. .,School of Optometry, Indiana University, Bloomington, IN, USA.
| | - Bryan W Boudouris
- Charles D. Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, USA. .,Department of Chemistry, Purdue University, West Lafayette, IN, USA. .,Birck Nanotechnology Center, Purdue University, West Lafayette, IN, USA.
| | - Chi Hwan Lee
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA. .,School of Optometry, Indiana University, Bloomington, IN, USA. .,School of Mechanical Engineering, Purdue University, West Lafayette, IN, USA. .,School of Materials Engineering, Purdue University, West Lafayette, IN, USA. .,Center for Implantable Devices, Purdue University, West Lafayette, IN, USA. .,Birck Nanotechnology Center, Purdue University, West Lafayette, IN, USA.
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Lee SA, Flynn K, Delaunay G, Kennelly MM, Turner MJ. Air Pollution Levels Outside the Capital's Maternity Hospitals. Ir Med J 2022; 115:650. [PMID: 36302350] [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] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Introduction The World Health Organisation has identified air pollution as the single biggest environmental threat to human health. There is growing evidence in the literature that air pollution is associated with negative outcomes in pregnancy. The purpose of this study was to measure pollution levels in the immediate surroundings of the three Dublin maternity hospitals by measuring fine particulate matter <2.5 micrometres (PM2.5). Methods Data pertaining to levels of PM2.5 at the three Dublin maternity hospitals were obtained from Pollutrack's records for the time period 25/6/2021-2/12/2021. Results were compared to the 2021 WHO Air Quality Guidelines. Results Average PM2.5 levels were 9μg/m³ around the National Maternity Hospital, 10μg/m³ around the Coombe Hospital and 13μg/m³ around the Rotunda Hospital. Levels were higher during the day, weekdays and in December. No matter when the PM2.5 levels were measured, results were higher than those recommended by the World Health Organisation's Air Quality Guideline. Discussion Air pollution levels across Ireland's capital city are higher than recommended by the WHO. This is concerning for the public and in particular for the pregnant population. Going forward, further research is required on the relationship between levels of air pollutants and adverse pregnancy outcomes in Dublin.
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Affiliation(s)
- S A Lee
- UCD Centre for Human Reproduction, Coombe Women and Infants University Hospital, Dublin, Ireland
| | - K Flynn
- UCD Centre for Human Reproduction, Coombe Women and Infants University Hospital, Dublin, Ireland
| | | | - M M Kennelly
- UCD Centre for Human Reproduction, Coombe Women and Infants University Hospital, Dublin, Ireland
| | - M J Turner
- UCD Centre for Human Reproduction, Coombe Women and Infants University Hospital, Dublin, Ireland
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Lee SA, O'Brien OF, Turner MJ, Kennelly MM. Implementing Medical Student Teaching on Gynaecological Healthcare of Transgender Patients. Ir Med J 2022; 115:632. [PMID: 36300707] [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] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Introduction Transgender people have specific healthcare needs and experience difficulty in accessing health services. Medical students should receive teaching on general and gynaecological healthcare issues in this population. Our aim was to assess medical students' knowledge of healthcare needs of transgender people before and after a newly implemented teaching session on transgender healthcare. Method A mixed-method study was carried out over a three month period in a university obstetric and gynaecology hospital in Dublin. A one-hour teaching session was developed and delivered to final year medical students. Students completed a survey before and after receiving the lecture. Results Seventy-one students completed the pre-lecture survey and forty-three completed the post-lecture survey. Pre-lecture, 64 students (90%) reported some-to-no understanding of healthcare issues of transgender people, and only 13 (18%) reported understanding gynaecological issues faced by transgender people. Post-lecture, 41 (95%) had a better understanding of health issues faced by this population and 40 (93%) had a better understanding of gynaecological health issues faced. Most students (81%) wanted further teaching on the topic. Conclusion A one-hour teaching session was effective at improving student knowledge of care of transgender people. This teaching could be expanded to all Irish medical schools. Going forward, the teaching could be adapted for post-graduate obstetric and gynaecology teaching.
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Affiliation(s)
- S A Lee
- UCD Centre for Human Reproduction, Coombe Women and Infants University Hospital, Dublin 8, Ireland
| | - O F O'Brien
- UCD Centre for Human Reproduction, Coombe Women and Infants University Hospital, Dublin 8, Ireland
| | - M J Turner
- UCD Centre for Human Reproduction, Coombe Women and Infants University Hospital, Dublin 8, Ireland
| | - M M Kennelly
- UCD Centre for Human Reproduction, Coombe Women and Infants University Hospital, Dublin 8, Ireland
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Jang G, Lee SA, Hong JH, Park BR, Kim DK, Kim CS. Chondroprotective Effects of 4,5-Dicaffeoylquinic Acid in Osteoarthritis through NF-κB Signaling Inhibition. Antioxidants (Basel) 2022; 11:antiox11030487. [PMID: 35326137 PMCID: PMC8944529 DOI: 10.3390/antiox11030487] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [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: 01/19/2022] [Revised: 02/26/2022] [Accepted: 02/26/2022] [Indexed: 01/27/2023] Open
Abstract
Osteoarthritis (OA) is characterized by cartilage degradation, inflammation, and pain. The dicaffeoylquinic acid (diCQA) isomer, 4,5-diCQA, exhibits antioxidant activity and various other health-promoting benefits, but its chondroprotective effects have yet to be elucidated. In this study, we aimed to investigate the chondroprotective effects of 4,5-diCQA on OA both in vitro and in vivo. Primary rat chondrocytes were pre-treated with 4,5-diCQA for 1 h before stimulation with interleukin (IL)-1β (5 ng/mL). The accumulation of nitrite, PGE2, and aggrecan was observed using the Griess reagent and ELISA. The protein levels of iNOS, COX-2, MMP-3, MMP-13, ADMATS-4, MAPKs, and the NF-κB p65 subunit were measured by Western blotting. In vivo, the effects of 4,5-diCQA were evaluated for 2 weeks in a destabilization of the medial meniscus (DMM)-surgery-induced OA rat model. 4,5-diCQA significantly inhibited IL-1β-induced expression of nitrite, iNOS, PGE2, COX-2, MMP-3, MMP-13, and ADAMTS-4. 4,5-diCQA also decreased the IL-1β-induced degradation of aggrecan. It also suppressed the IL-1β-induced phosphorylation of MAPKs and translocation of the NF-κB p65 subunit to the nucleus. These findings indicate that 4,5-diCQA inhibits DMM-surgery-induced cartilage destruction and proteoglycan loss in vivo. 4,5-diCQA may be a potential therapeutic agent for the alleviation of OA progression. In this study, diclofenac was set to be administered once every two days, but it showed an effect on OA. These results may be used as basic data to suggest a new dosing method for diclofenac.
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Affiliation(s)
- Goeun Jang
- Department of Oral Biochemistry, College of Dentistry, Chosun University, Gwangju 61452, Korea; (G.J.); (S.A.L.)
| | - Seul Ah Lee
- Department of Oral Biochemistry, College of Dentistry, Chosun University, Gwangju 61452, Korea; (G.J.); (S.A.L.)
| | - Joon Ho Hong
- Nano Bio Research Center, Jeonnam Bioindustry Foundation, Wando 59108, Korea;
| | - Bo-Ram Park
- Department of Dental Hygiene, College of Health and Welfare, Kyungwoon University, Gumi 39160, Korea;
| | - Do Kyung Kim
- Oral Biology Research Institute, College of Dentistry, Chosun University, Gwangju 61452, Korea;
| | - Chun Sung Kim
- Department of Oral Biochemistry, College of Dentistry, Chosun University, Gwangju 61452, Korea; (G.J.); (S.A.L.)
- Correspondence: ; Tel.: +82-62-230-7088; Fax: +82-62-232-6896
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Bang JH, Lee SG, Kwon KJ, Lee SA, Eun YG, Lee YC. Effect of Proton Pump Inhibitor on the Outcome of Laryngeal Microsurgery in Patients With Vocal Fold Mucosal Disease With Reflux Symptoms. J Voice 2022:S0892-1997(22)00008-X. [PMID: 35153121 DOI: 10.1016/j.jvoice.2022.01.009] [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: 11/13/2021] [Revised: 01/05/2022] [Accepted: 01/06/2022] [Indexed: 11/18/2022]
Abstract
OBJECTIVES To evaluate the effect of proton pump inhibitor (PPI) after laryngeal microsurgery (LMS) in patients with benign vocal fold (VF) mucosal disease and in patients with overt reflux symptom according to subjective and objective voice assessment. METHODS The improvement of voice handicap index-10 (VHI-10) score, reflux symptom index (RSI) score, grade, roughness, breathiness, asthenia, and strain (GRBAS) score, Jitter, Shimmer, noise to harmonics ratio (NHR), maximum phonation time of acoustic voice analysis RESULTS: A total of 47 patients (PPI group [n = 24] and non-PPI group [n = 23]) completed the study. The scores for VHI-10, RSI, GRBAS, and acoustic parameters significantly improved in both groups after surgery. In the subgroup analysis of patients with overt reflux symptoms (RSI ≥ 13; non-PPI group [n = 12], PPI group [n = 15]), significant between-group differences were observed in terms of the improvement in NHR and the strain factor. CONCLUSION Postoperative PPI administration in patients with VF benign mucosal disease with reflux symptoms might improve subjective and objective voice outcomes after LMS.
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Affiliation(s)
- Je Ho Bang
- Department of Otolaryngology - Head and Neck Surgery, School of Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Sun Gyu Lee
- Department of Otolaryngology - Head and Neck Surgery, School of Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Ki Jin Kwon
- Department of Otolaryngology - Head and Neck Surgery, School of Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Seul Ah Lee
- Department of Otolaryngology - Head and Neck Surgery, School of Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Young-Gyu Eun
- Department of Otolaryngology - Head and Neck Surgery, School of Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Young Chan Lee
- Department of Otolaryngology - Head and Neck Surgery, School of Medicine, Kyung Hee University, Seoul, Republic of Korea.
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Rodriguez Segura L, Lee SA, Mash BL, Schuman AJ, Ren T. A Series of Mono- and Bis-Alkynyl Co(III) Complexes Supported by a Tetra-imine Macrocyclic Ligand (TIM). Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00423] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Seul Ah Lee
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Brandon L. Mash
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Ashley J. Schuman
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Tong Ren
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
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Lee SA, Febery E, Mottram T, Bedford MR. Growth performance, real-time gizzard pH and calcium solubility in the gut of broiler chickens is dependent on the interaction between dietary calcium concentration and limestone particle size. Br Poult Sci 2021; 62:827-834. [PMID: 34009073 DOI: 10.1080/00071668.2021.1929840] [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] [Indexed: 10/21/2022]
Abstract
1.The purpose of this study was to determine the effect of limestone particle size and dietary Ca concentration on performance, real-time gizzard pH, and Ca and P solubility in the gastrointestinal tract of 21d broiler chickens.2. A total of 576, one-day-old Ross 308 male broilers were randomly allocated among 4 treatments, with 8 replicate pens, and 18 birds per pen. Treatments were arranged as a 2 × 2 factorial consisting of two particle sizes of limestone (coarse, CL, 1200 µm; fine, FL, 44 µm) and two Ca concentrations (9.6 or 6.0 g/kg). On d 19 and 20, four birds per treatment were administered Heidelberg pH capsules and readings monitored for 3 h.3. Reducing Ca concentration from 9.6 to 6.0 g/kg had no effect on d 21 weight gain or FCR of birds fed CL; however, feeding FL at 9.6 g/kg Ca increased weight gain by 10% and reduced FCR by 5% compared to FL at 6.0 g/kg Ca (P < 0.001).4. Average gizzard pH readings ranged from pH 0.67 to 3.01 across all treatments. Birds fed CL at 6.0 g/kg Ca had lower average gizzard pH compared to birds fed 9.6 g/kg Ca, while birds fed FL at 6.0 g/kg Ca had higher gizzard pH than birds fed CL at both Ca concentrations, but was comparable to birds fed FL at 9.6 g/kg Ca (P < 0.001).5. For birds fed CL at 6.0 g/kg Ca, soluble Ca in the gizzard was approximately 40% lower (P < 0.05) than all other treatments, and reduced by 44% (P < 0.05) in the small intestine compared with birds fed FL at 6.0 g/kg Ca.6. These findings demonstrated that the effect of Ca concentration on gizzard pH, Ca solubility and broiler performance was dependent on limestone particle size and suggested that solubility per se had little relevance to performance.
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Affiliation(s)
- S A Lee
- AB Vista, Marlborough, Wiltshire, UK
| | - E Febery
- Drayton Animal Health, Stratford-Upon-Avon, Warwickshire, UK
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Lee SA, Park BR, Moon SM, Shin SH, Kim JS, Kim DK, Kim CS. Cynaroside protects human periodontal ligament cells from lipopolysaccharide-induced damage and inflammation through suppression of NF-κB activation. Arch Oral Biol 2020; 120:104944. [PMID: 33099251 DOI: 10.1016/j.archoralbio.2020.104944] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [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: 07/27/2020] [Revised: 09/22/2020] [Accepted: 10/07/2020] [Indexed: 02/08/2023]
Abstract
OBJECTIVE To investigate whether cynaroside protects human periodontal ligament (hPDL) cells from lipopolysaccharide (LPS)-induced damage and inflammation and to analyze the underlying mechanism. METHODS LPS was used to stimulate hPDL and RAW264.7 cells. MTT assay was used to detect cell viability, and protein expression levels were measured via western blot analysis. Nitrite oxide and prostaglandin E2 were used to quantify the inflammatory response. Alizarin Red S staining was used to detect mineralized nodules. RESULTS Cynaroside inhibited the expression of iNOS, COX-2, TNF-α, and IL-6 in LPS-stimulated hPDL and RAW264.7 cells without cytotoxicity. Furthermore, cynaroside significantly suppressed LPS-induced protein expression of matrix metalloproteinase 3. Additionally, cynaroside prevented LPS-induced NF-κB p65 subunit translocation to the nucleus by inhibiting the phosphorylation and degradation of IκB-α. Moreover, cynaroside could restore the mineralization ability of hPDL cells reduced by LPS. CONCLUSION Cynaroside protected hPDL cells from LPS-induced damage and inflammation via inhibition of NF-κB activation. These results suggest that cynaroside may be a potential therapeutic agent for the alleviation of periodontitis.
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Affiliation(s)
- Seul Ah Lee
- Department of Oral Biochemistry, College of Dentistry, Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea
| | - Bo-Ram Park
- Department of Dental Hygiene, College of Health and Welfare, Kyungwoon University, 730, Gangdong-ro, Gyeongsangbuk-do, 39160, Republic of Korea
| | - Sung-Min Moon
- CStech Research Institute, 38 Chumdanventuresoro, Gwangju, 61007, Republic of Korea
| | - Sang Hun Shin
- Department of Oral Biochemistry, College of Dentistry, Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea
| | - Jae-Sung Kim
- Oral Biology Research Institute, College of Dentistry, Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea
| | - Do Kyung Kim
- Oral Biology Research Institute, College of Dentistry, Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea
| | - Chun Sung Kim
- Department of Oral Biochemistry, College of Dentistry, Chosun University, 309 Pilmun-daero, Dong-gu, Gwangju, 61452, Republic of Korea.
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Lee SA, Moon SM, Han SH, Hwang EJ, Park BR, Kim JS, Kim DK, Kim CS. Corrigendum to "Chondroprotective effects of aqueous extract of Anthriscus sylvestris leaves on osteoarthritis in vitro and in vivo through MAPKs and NF-κB signaling inhibition" [Biomed. Pharmacother. 103 (2018) 1202-1211]. Biomed Pharmacother 2020; 127:110190. [PMID: 32423657 DOI: 10.1016/j.biopha.2020.110190] [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: 11/16/2022] Open
Affiliation(s)
- Seul Ah Lee
- Department of Oral Biochemistry, College of Dentistry, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju 501-759, Republic of Korea
| | - Sung-Min Moon
- CStech Research Institute, 38 Chumdanventuresoro, Gwangju 61007, Republic of Korea
| | - Seul Hee Han
- CStech Research Institute, 38 Chumdanventuresoro, Gwangju 61007, Republic of Korea
| | - Eun Ju Hwang
- Department of Oral Biochemistry, College of Dentistry, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju 501-759, Republic of Korea
| | - Bo-Ram Park
- Department of Dental Hygiene, Chodang University, Muan-ro, Muan-eup, Muan 534-701, Republic of Korea
| | - Jae-Sung Kim
- Oral Biology Research Institute, College of Dentistry, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju 501-759, Republic of Korea
| | - Do Kyung Kim
- Oral Biology Research Institute, College of Dentistry, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju 501-759, Republic of Korea
| | - Chun Sung Kim
- Department of Oral Biochemistry, College of Dentistry, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju 501-759, Republic of Korea.
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Lee SA, Park BR, Moon SM, Han SH, Kim CS. Anti-inflammatory potential of Trifolium pratense L. leaf extract in LPS-stimulated RAW264.7 cells and in a rat model of carrageenan-induced inflammation. Arch Physiol Biochem 2020; 126:74-81. [PMID: 30320514 DOI: 10.1080/13813455.2018.1493607] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This study evaluated the anti-inflammatory potential of a 40% prethanol extract of Trifolium pratense leaves (40% PeTP) using in vitro (RAW264.7 cells) and in vivo (carrageenan-induced inflammation model) experiments. Pretreatment with 40% PeTP significantly inhibited the LPS-induced expression of nitric oxide (NO), prostaglandin E2 (PGE2), inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2), and inflammatory cytokines, including tumour necrosis factor (TNF)-α, interleukin (IL)-1β, and IL-6 in RAW264.7 cells, without inducing cytotoxicity. The inhibitory effects of 40% PeTP are mediated through suppression of the nuclear translocation of nuclear factor (NF)-κB and the phosphorylation of mitogen-activated protein kinases (MAPKs). Oral administration of 40% PeTP at 50, 100, and 200 mg/kg of body weight suppressed carrageenan-induced oedema in a dose-dependent manner. Collectively, our results suggested that 40% PeTP exerts potential anti-inflammatory effects by suppressing the activation of the NF-κB and MAPK pathways in vitro, and by reducing carrageenan-induced paw oedema in vivo.
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Affiliation(s)
- Seul Ah Lee
- Department of Oral Biochemistry, College of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Bo-Ram Park
- Department of Dental Hygiene, Chodang University, Muan, Republic of Korea
| | - Sung-Min Moon
- CStech Research Institute, Gwangju, Republic of Korea
| | - Seul Hee Han
- CStech Research Institute, Gwangju, Republic of Korea
| | - Chun Sung Kim
- Department of Oral Biochemistry, College of Dentistry, Chosun University, Gwangju, Republic of Korea
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Choi MS, Moon SM, Lee SA, Park BR, Kim JS, Kim DK, Kim YH, Kim CS. Erratum: Adenosine induces intrinsic apoptosis via the PI3K/Akt/mTOR signaling pathway in human pharyngeal squamous carcinoma FaDu cells. Oncol Lett 2019; 17:3615. [PMID: 30867805 PMCID: PMC6396206 DOI: 10.3892/ol.2019.10014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
[This corrects the article DOI: 10.3892/ol.2018.8089.].
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Moon YW, Park N, Hur J, Pandey K, Cho YB, Kim SK, Lee SA, Son GW, Jo JM, An HJ. Abstract P4-06-23: Feasibility of sygeneic mice models of breast cancer for research of immune checkpoint blockades. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p4-06-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: With the increasing success of immune checkpoint blockades for cancer treatment, we increasingly need well-characterized preclinical models. Syngeneic mice models (with a fully competent immune system) have advantages that they are easily established and cost less, though they do not reflect genetic complexity of human tumors. We evaluated feasibility of syngeneic mice models of breast cancer by analyzing efficacy of immune checkpoint blockade and dynamic change of tumor immune microenvironment.
Methods: We used syngeneic mice model of JC, 4T1, and EMT6 cells, which are all murine triple negative breast cancer in BALB/c mice. At the time when subcutaneous tumors reach at 50˜100mm^3, each mice models were divided into 2 groups for treatment versus no-treatment control. In the treatment group, mice version of anti-PD-1 antibody was intraperitoneally injected (q 3 days, x 6). Anti-tumor efficacy was monitored by measuring tumor volume. 'Tumor response' was defined as a case with tumor volume less than that of control group by a standard error at a determined time point. Immune microenvironment was evaluated by measuring serum cytokines (IL-2, IL-6, IL-10, IFNγ, and TNFα) with legendplex and immune cells (CD3, CD4, CD8, CD56, and FOXP3) of peripheral blood with FACS before injection of PD-1 blockade, after 1st injection, and when euthanized. Tumor-infiltrating immune cells were evaluated with FACS, when euthanized.
Results: The tumor response rate to PD-1 blockade was highest in the 4T1 model (54.5%, 6/11) compared to JC model (40%, 4/10) or EMT6 model (36.4%, 4/11). Bleeding 3 times and tumor obtainment when euthanized in each mouse were feasible for profiling of cytokines and immune cells. Although before treatment with PD-1 blockade, CD3+T cells in peripheral blood were slightly lower in 4T1 model (18.3±8.1%) than JC model (24.6±4.7%) or EMT6 model (27.9±6.3%), after injection of one dose of PD-1 blockade, CD3+T cells increased 1.5 times in 4T1 model (18.3% to 27.3%), whereas those CD3+T cells decreased slightly in JC model and EMT6 model. Dynamic changes were not observed in other subsets of peripheral immune cells in all 3 models. Serum TNFα (with statistical significance) and IFNγ (with borderline significance) were higher in responders than in non-responders or no-treatment control.
Conclusions: Syngeneic mice models of breast cancer were feasible to investigate immune checkpoint blockades and monitor dynamic change of immune microenvironment. In this regard, such models may be used to evaluate immune checkpoint blockade-based combination therapy as well.
Citation Format: Moon YW, Park N, Hur J, Pandey K, Cho YB, Kim SK, Lee SA, Son GW, Jo JM, An H-J. Feasibility of sygeneic mice models of breast cancer for research of immune checkpoint blockades [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P4-06-23.
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Affiliation(s)
- YW Moon
- CHA Bundang Medical Center, Seongnam, Republic of Korea; CHA University, Seongnam, Republic of Korea
| | - N Park
- CHA Bundang Medical Center, Seongnam, Republic of Korea; CHA University, Seongnam, Republic of Korea
| | - J Hur
- CHA Bundang Medical Center, Seongnam, Republic of Korea; CHA University, Seongnam, Republic of Korea
| | - K Pandey
- CHA Bundang Medical Center, Seongnam, Republic of Korea; CHA University, Seongnam, Republic of Korea
| | - YB Cho
- CHA Bundang Medical Center, Seongnam, Republic of Korea; CHA University, Seongnam, Republic of Korea
| | - SK Kim
- CHA Bundang Medical Center, Seongnam, Republic of Korea; CHA University, Seongnam, Republic of Korea
| | - SA Lee
- CHA Bundang Medical Center, Seongnam, Republic of Korea; CHA University, Seongnam, Republic of Korea
| | - GW Son
- CHA Bundang Medical Center, Seongnam, Republic of Korea; CHA University, Seongnam, Republic of Korea
| | - JM Jo
- CHA Bundang Medical Center, Seongnam, Republic of Korea; CHA University, Seongnam, Republic of Korea
| | - H-J An
- CHA Bundang Medical Center, Seongnam, Republic of Korea; CHA University, Seongnam, Republic of Korea
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Lee SA, Bedford MR, Walk CL. Meta-analysis: explicit value of mono-component proteases in monogastric diets. Poult Sci 2018; 97:2078-2085. [PMID: 29462412 DOI: 10.3382/ps/pey042] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Accepted: 01/16/2018] [Indexed: 01/31/2023] Open
Abstract
A meta-analysis was conducted to investigate the effect of mono-component proteases on performance and apparent ileal amino acid digestibility (AIAAD, %) in monogastrics. A total of 67 experimental trials were included in the meta-analysis from published and internal reports, contributing 467 lines of data. Poultry and swine data accounted for 81 and 19% of the dataset, respectively. Forty-four different proteases were included in the meta-analysis, accounting for commercial and non-commercial products. Mixed Model analysis was used to assess protease effect and the influence of inherent characteristics of the control on protease response. The mean performance response to protease was a reduction in feed conversion ratio (FCR) for poultry (1%, P < 0.05) and swine (4%, P > 0.05). The mean relative effect of protease on AIAAD over the control was 1.6 ± 0.3%, ranging from 1.2% for Arg, Phe and Trp to 2.6% for Cys. For the majority of amino acids, inherent AIAAD of control diets influenced (P < 0.05) the magnitude of the protease response such that, as inherent digestibility increased, the effect of protease on amino acid digestibility decreased. The dataset was subsequently divided into 2 subgroups: diets with and without other enzymes, namely non-starch polysaccharide degrading enzymes (NSPase) and phytase. Addition of protease in diets containing no other enzymes significantly (P < 0.05) increased AIAAD for the majority of amino acids and tended (P < 0.10) to improve Met, Trp, Pro, Gly, and Tyr. However, when other enzymes were included in the experiment, the beneficial effect of protease on AIAAD was lost (P > 0.05). These findings suggest that when other enzymes are already included in the diet, addition of protease requires further justification for use in monogastric diets.
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Affiliation(s)
- S A Lee
- AB Vista, Woodstock Court, Blenheim Road, Marlborough Business Park, Marlborough, Wiltshire, SN8 4AN, United Kingdom
| | - M R Bedford
- AB Vista, Woodstock Court, Blenheim Road, Marlborough Business Park, Marlborough, Wiltshire, SN8 4AN, United Kingdom
| | - C L Walk
- AB Vista, Woodstock Court, Blenheim Road, Marlborough Business Park, Marlborough, Wiltshire, SN8 4AN, United Kingdom
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Lee SA, Dunne J, Febery E, Brearley CA, Mottram T, Bedford MR. Exogenous phytase and xylanase exhibit opposing effects on real-time gizzard pH in broiler chickens. Br Poult Sci 2018; 59:568-578. [PMID: 29976077 DOI: 10.1080/00071668.2018.1496403] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
1. The current study was conducted to evaluate the influence of high phytase doses and xylanase, individually and in combination, on performance, blood inositol and real-time gastric pH in broilers fed wheat-based diets. 2. In a 42-d experiment, a total of 576 male Ross 308 broiler chicks were allocated to 4 dietary treatments. Treatments consisted of a 2 × 2 factorial arrangement, with 500 or 2500 FTU/kg phytase and 0 or 16 000 BXU/kg xylanase, fed in two phases (starter 0-21; grower 21-42 d). Heidelberg pH capsules were administered to 8 birds from each treatment group, pre- and post-diet phase change, with readings captured over a 5.5-h period. 3. At 21 and 42 d, birds fed 500 FTU/kg phytase without xylanase had on average 127 and 223 g lower weight gain than all other treatments, respectively (P < 0.05). At 21 d, feed conversion ratio (FCR) was reduced (P < 0.01) by 2500 FTU/kg phytase or xylanase; however, 42-d FCR was unaffected by enzyme treatment. Inositol content of plasma was twice that of the erythrocyte (P < 0.001), with 2500 FTU/kg phytase tending to increase (P = 0.07) inositol content in both blood fractions. 4. Across all treatments, capsule readings ranged from pH 0.54 to 4.84 in the gizzard of broilers. Addition of 2500 FTU/kg phytase to the grower diet reduced (P < 0.05) average gizzard pH from 2.89 to 1.69, whilst feeding xylanase increased (P < 0.001) gizzard pH from 2.04 to 2.40. In contrast, digital probe measurements showed no effect of xylanase on gizzard pH, while addition of 2500 FTU/kg phytase increased (P = 0.05) pH compared to 500 FTU/kg phytase with or without xylanase. 5. These findings suggested that xylanase and high phytase doses have opposite effects on real-time gastric pH, while similarly improving performance of broilers.
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Affiliation(s)
- S A Lee
- a AB Vista , Marlborough , Wiltshire , UK
| | - J Dunne
- b Drayton Animal Health , Stratford-Upon-Avon , Warwickshire , UK
| | - E Febery
- b Drayton Animal Health , Stratford-Upon-Avon , Warwickshire , UK
| | - C A Brearley
- c School of Biological Sciences, University of East Anglia , Norwich , UK
| | - T Mottram
- d eCow Devon Ltd ., Exeter , Devon , UK
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Lee KS, Park HK, Chio YS, Lee SA, Heo R, Lee SM, Song JM, Kang DH, Song JK. P1758Clinical situations associated with inappropriately large regurgitant volume in the assessment of mitral regurgitation severity using proximal flow convergence method. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p1758] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- K S Lee
- Asan Medical Center, Cardiology, Seoul, Korea Republic of
| | - H K Park
- Asan Medical Center, Cardiology, Seoul, Korea Republic of
| | - Y S Chio
- Asan Medical Center, Cardiology, Seoul, Korea Republic of
| | - S A Lee
- Asan Medical Center, Cardiology, Seoul, Korea Republic of
| | - R Heo
- Asan Medical Center, Cardiology, Seoul, Korea Republic of
| | - S M Lee
- Asan Medical Center, Cardiology, Seoul, Korea Republic of
| | - J M Song
- Asan Medical Center, Cardiology, Seoul, Korea Republic of
| | - D H Kang
- Asan Medical Center, Cardiology, Seoul, Korea Republic of
| | - J K Song
- Asan Medical Center, Cardiology, Seoul, Korea Republic of
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Gabrielse G, Glowacz B, Grzonka D, Hamley CD, Hessels EA, Jones N, Khatri G, Lee SA, Meisenhelder C, Morrison T, Nottet E, Rasor C, Ronald S, Skinner T, Storry CH, Tardiff E, Yost D, Martinez Zambrano D, Zielinski M. Lyman-α source for laser cooling antihydrogen. Opt Lett 2018; 43:2905-2908. [PMID: 29905720 DOI: 10.1364/ol.43.002905] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Accepted: 05/09/2018] [Indexed: 06/08/2023]
Abstract
We present a Lyman-α laser developed for cooling trapped antihydrogen. The system is based on a pulsed Ti:sapphire laser operating at 729 nm that is frequency doubled using an LBO crystal and then frequency tripled in a Kr/Ar gas cell. After frequency conversion, this system produces up to 5.7 μW of average power at the Lyman-α wavelength. This laser is part of the ATRAP experiment at the antiproton decelerator in CERN.
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Kim JS, Choi DW, Kim CS, Yu SK, Kim HJ, Go DS, Lee SA, Moon SM, Kim SG, Chun HS, Kim J, Kim JK, Kim DOK. MicroRNA-203 Induces Apoptosis by Targeting Bmi-1 in YD-38 Oral Cancer Cells. Anticancer Res 2018; 38:3477-3485. [PMID: 29848700 DOI: 10.21873/anticanres.12618] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 04/18/2018] [Accepted: 04/19/2018] [Indexed: 11/10/2022]
Abstract
BACKGROUND/AIM MicroRNAs (miRNAs) are closely associated with a number of cellular processes, including cell development, differentiation, proliferation, carcinogenesis, and apoptosis. The aim of the present study was to elucidate the molecular mechanisms underlying the tumor suppressor activity of miRNA-203 (miR-203) in YD-38 human oral cancer cells. MATERIALS AND METHODS Polymerase chain reaction analysis, MTT assay, DNA fragmentation assay, fluorescence-activated cell-sorting analysis, gene array, immunoblotting, and luciferase assay were carried out in YD-38 cells. RESULTS miR-203 expression was significantly down-regulated in YD-38 cells compared to expression levels in normal human oral keratinocytes. miR-203 decreased the viability of YD-38 cells in a time- and dose-dependent manner. In addition, over-expression of miR-203 significantly increased not only DNA segmentation, but also the apoptotic population of YD-38 cells. These results indicate that miR-203 overexpression induces apoptosis in YD-38 cells. Target gene array analysis revealed that the expression of the polycomb complex protein gene Bmi-1, a representative oncogene, was significantly down-regulated by miR-203 in YD-38 cells. Moreover, both mRNA and protein levels of Bmi-1 were significantly reduced in YD-38 cells transfected with miR-203. These results indicate that Bmi-1 is a target gene of miR-203. A luciferase reporter assay confirmed that miR-203 suppressed Bmi-1 expression by directly targeting the 3'-untranslated region. CONCLUSION miR-203 induces apoptosis in YD-38 cells by directly targeting Bmi-1, which suggests its possible application as an anti-cancer therapeutic.
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Affiliation(s)
- Jae-Sung Kim
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Dae Woo Choi
- Department of Pharmacology, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - Chun Sung Kim
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Sun-Kyoung Yu
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Heung-Joong Kim
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Dae-San Go
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Seul Ah Lee
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Sung Min Moon
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Su Gwan Kim
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Hong Sung Chun
- Department of Biomedical Science, Chosun University, Gwangju, Republic of Korea
| | - Jeongsun Kim
- Department of Dental Hygiene, Gwangju Health University, Gwangju, Republic of Korea
| | - Jong-Keun Kim
- Department of Pharmacology, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - DO Kyung Kim
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju, Republic of Korea
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Lee SA, Moon SM, Han SH, Hwang EJ, Hong JH, Park BR, Choi MS, Ahn H, Kim JS, Kim HJ, Chun HS, Kim DK, Kim CS. In Vivo and In Vitro Anti-Inflammatory Effects of Aqueous Extract of Anthriscus sylvestris Leaves. J Med Food 2018; 21:585-595. [DOI: 10.1089/jmf.2017.4089] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Affiliation(s)
- Seul Ah Lee
- Department of Oral Biochemistry, College of Dentistry, Chosun University, Gwangju, Korea
| | - Sung-Min Moon
- Department of Oral Biology Research Institute, College of Dentistry, Chosun University, Gwangju, Korea
- CStech Research Institute, Gwangju, Korea
| | | | - Eun Ju Hwang
- Department of Oral Biochemistry, College of Dentistry, Chosun University, Gwangju, Korea
| | - Joon Ho Hong
- Nano Bio Research Center, Jeonnam Bioindustry Foundation, Jang Seong, Jeollanam-do, Korea
| | - Bo-Ram Park
- Department of Dental Hygiene, Chodang University, Muan, Muan-eup, Korea
| | - Mi Suk Choi
- Department of Dental Hygiene, Chodang University, Muan, Muan-eup, Korea
| | - Hoon Ahn
- Department of Dental Hygiene, Chodang University, Muan, Muan-eup, Korea
| | - Jae-Sung Kim
- Department of Oral Biology Research Institute, College of Dentistry, Chosun University, Gwangju, Korea
| | - Heung-Joong Kim
- Department of Oral Biology Research Institute, College of Dentistry, Chosun University, Gwangju, Korea
| | - Hong Sung Chun
- Department of Biomedical Science, Chosun University, Gwangju, Korea
| | - Do Kyung Kim
- Department of Oral Biology Research Institute, College of Dentistry, Chosun University, Gwangju, Korea
| | - Chun Sung Kim
- Department of Oral Biochemistry, College of Dentistry, Chosun University, Gwangju, Korea
- Department of Oral Biology Research Institute, College of Dentistry, Chosun University, Gwangju, Korea
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Lee SA, Moon SM, Han SH, Hwang EJ, Park BR, Kim JS, Kim DK, Kim CS. Chondroprotective effects of aqueous extract of Anthriscus sylvestris leaves on osteoarthritis in vitro and in vivo through MAPKs and NF-κB signaling inhibition. Biomed Pharmacother 2018; 103:1202-1211. [PMID: 29864899 DOI: 10.1016/j.biopha.2018.04.183] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [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: 01/24/2018] [Revised: 04/24/2018] [Accepted: 04/24/2018] [Indexed: 12/21/2022] Open
Abstract
Osteoarthritis (OA) is a common degenerative joint disease, characterized by cartilage degradation and inflammation, in the elderly population. Anthriscus sylvestris has been used in Korean traditional medicine and contains many polyphenolic compounds such as cynaroside and chlorogenic acid, which are major active components responsible for its antioxidant effect. In this study, we aimed to evaluate the chondroprotective effect of an aqueous extract of A. sylvestris leaves (AE-ASL) on OA, both in vitro and in vivo. Rat primary chondrocytes were pretreated with AE-ASL for 1 h before interleukin-1β (20 ng/mL) stimulation. The production of nitrite, PGE2, aggrecan, and collagen type II were detected by Griess reagent and ELISAs. The mRNA levels of iNOS, COX-2, MMP-3, and MMP-13 were measured by RT-PCR. In addition, protein levels of iNOS, COX-2, MMP-3, MMP-13, ADAMTS-4, MAPKs, and NF-κB p65 subunit were measured by western blot analysis. Sulfated glycosaminoglycan (sGAGs) were detected by dimethylmethylene blue (DMMB) assay. During in vivo study, the effects of AE-ASL were evaluated for 8 weeks in a rat model of destabilization of the medial meniscus (DMM) surgery-induced OA. AE-ASL significantly inhibited expression of nitrite, iNOS, PGE2, COX-2, MMP-3, MMP-13, and ADAMTS-4 in IL-1β-stimulated chondrocytes. Moreover, it decreased the IL-1β-induced degradation of aggrecan, collagen type II, and proteoglycan. In addition, AE-ASL suppressed IL-1β-induced phosphorylation of MAPKs and NF-κB p65 subunit translocation to nucleus. In vivo, AE-ASL inhibited DMM surgery-induced cartilage destruction and proteoglycan loss. Taken together, these results suggest that AE-ASL may be a potential therapeutic agent for the alleviation of OA progression.
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Affiliation(s)
- Seul Ah Lee
- Department of Oral Biochemistry, College of Dentistry, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju 501-759, Republic of Korea
| | - Sung-Min Moon
- CStech Research Institute, 38 Chumdanventuresoro, Gwangju 61007, Republic of Korea
| | - Seul Hee Han
- CStech Research Institute, 38 Chumdanventuresoro, Gwangju 61007, Republic of Korea
| | - Eun Ju Hwang
- Department of Oral Biochemistry, College of Dentistry, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju 501-759, Republic of Korea
| | - Bo-Ram Park
- Department of Dental Hygiene, Chodang University, Muan-ro, Muan-eup, Muan 534-701, Republic of Korea
| | - Jae-Sung Kim
- Oral Biology Research Institute, College of Dentistry, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju, 501-759, Republic of Korea
| | - Do Kyung Kim
- Oral Biology Research Institute, College of Dentistry, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju, 501-759, Republic of Korea
| | - Chun Sung Kim
- Department of Oral Biochemistry, College of Dentistry, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju 501-759, Republic of Korea.
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Lee SA, Espinosa CD, Stein HH. 321 Digestibility of Amino Acids, Energy, Fat, and Fiber and Digestible and Metabolizable Energy in Low-Oil Distillers Dried Grains with Solubles Fed to Growing Pigs. J Anim Sci 2018. [DOI: 10.1093/jas/sky073.318] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- S A Lee
- University of Illinois at Urbana-Champaign, Urbana, IL
| | - C D Espinosa
- University of Illinois at Urbana-Champaign, Urbana, IL
| | - H H Stein
- University of Illinois at Urbana-Champaign, Urbana, IL
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Rodriguez DA, Lee SA, Stein HH. 264 Effects of Dakota Gold and Conventional Distillers Dried Grains with Solubles on Wean to Finish Growth Performance and Carcass Characteristics of Pigs Fed Diets Provided As Pellets or in a Meal Form. J Anim Sci 2018. [DOI: 10.1093/jas/sky073.261] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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)
- D A Rodriguez
- University of Illinois at Urbana-Champaign, Urbana, IL
| | - S A Lee
- University of Illinois at Urbana-Champaign, Urbana, IL
| | - H H Stein
- University of Illinois at Urbana-Champaign, Urbana, IL
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Rodriguez DA, Lee SA, Stein HH. 323 Digestibility of Amino Acids, Fiber, and Fat and Concentrations of Digestible and Metabolizable Energy in Two Sources of Distillers Dried Grains with Solubles Fed to Growing Pigs. J Anim Sci 2018. [DOI: 10.1093/jas/sky073.320] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- D A Rodriguez
- University of Illinois at Urbana-Champaign, Urbana, IL
| | - S A Lee
- University of Illinois at Urbana-Champaign, Urbana, IL
| | - H H Stein
- University of Illinois at Urbana-Champaign, Urbana, IL
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31
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Lee SA, Walk CL, Stein HH. 157 Comparative Digestibility and Retention of Calcium and Phosphorus By Gestating Sows and Growing Pigs Fed Low- and High-Phytate Diets without or with Microbial Phytase. J Anim Sci 2018. [DOI: 10.1093/jas/sky073.154] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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)
- S A Lee
- University of Illinois at Urbana-Champaign, Urbana, IL
| | - C L Walk
- AB Vista, Marlborough, United Kingdom
| | - H H Stein
- University of Illinois at Urbana-Champaign, Urbana, IL
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Park B, Lee SA, Moon SM, Kim CS. Anthricin‑induced caspase‑dependent apoptosis through IGF1R/PI3K/AKT pathway inhibition in A549 human non‑small lung cancer cells. Oncol Rep 2018; 39:2769-2776. [DOI: 10.3892/or.2018.6333] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 03/23/2018] [Indexed: 11/06/2022] Open
Affiliation(s)
- Bo‑Ram Park
- Department of Dental Hygiene, Chodang University, Muan‑ro, Muan‑eup, Muan 534‑701, Republic of Korea
| | - Seul Ah Lee
- Department of Oral Biochemistry, College of Dentistry, Chosun University, Dong‑gu, Gwangju 501‑759, Republic of Korea
| | - Sung Min Moon
- CStech Research Institute, Gwangju 61007, Republic of Korea
| | - Chun Sung Kim
- Department of Oral Biochemistry, College of Dentistry, Chosun University, Dong‑gu, Gwangju 501‑759, Republic of Korea
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Abstract
1. The current study was conducted to investigate the effect of high phytase doses on growth performance and real-time gastric pH measurements in broiler chickens and pigs. 2. In the first experiment, 576 male Ross 308 broilers were fed in two phases (0-21 and 21-42 d) with 4 treatment groups, with diets meeting nutrient requirements containing 0, 500, 1500 or 2500 FTU/kg phytase. In the second, 64 Landrace weaners were fed on diets meeting nutrient requirements with or without phytase (0 or 2500 FTU/kg) in two phases (0-21 and 21-42 d). Heidelberg pH capsules were administered to 7 broilers and approximately 13 pigs per treatment group, pre- and post-phase change, with readings monitored over several hours. 3. Addition of phytase into an adequate Ca and P diet had no significant effect on broiler performance although phytase tended (P < 0.07) to improve feed conversion in pigs over the entire experimental period. Real-time pH capsule readings in broilers demonstrated an increase (P < 0.05) in gizzard pH when phytase was dosed at 500 or 1500 FTU/kg, while higher doses of 2500 FTU/kg phytase lowered pH to a level comparable to control birds. Gastric pH increased (P < 0.01) when animals were exposed to dietary phase change, signifying a potential challenge period for nutrient digestibility. However, pigs fed 2500 FTU/kg were able to maintain gastric pH levels through diet phase change. In contrast, spear-tip probe measurements showed no treatment effect on gastric pH. 4. These findings demonstrate dietary manipulation of gastric pH and the value of real-time pH capsule technology as a means of determining phytase dose response.
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Affiliation(s)
- S A Lee
- a AB Vista , Marlborough, Wiltshire , UK
| | - J Dunne
- b Drayton Animal Health , Stratford-Upon-Avon , Warwickshire , UK
| | - E Febery
- b Drayton Animal Health , Stratford-Upon-Avon , Warwickshire , UK
| | - P Wilcock
- a AB Vista , Marlborough, Wiltshire , UK
| | - T Mottram
- c eCow Devon Ltd , Exeter , Devon , UK
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Choi MS, Moon SM, Lee SA, Park BR, Kim JS, Kim DK, Kim YH, Kim CS. Adenosine induces intrinsic apoptosis via the PI3K/Akt/mTOR signaling pathway in human pharyngeal squamous carcinoma FaDu cells. Oncol Lett 2018; 15:6489-6496. [PMID: 29616118 DOI: 10.3892/ol.2018.8089] [Citation(s) in RCA: 8] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Accepted: 10/13/2017] [Indexed: 12/24/2022] Open
Abstract
Adenosine has been identified to occur abundantly intra-and extracellularly, and to exert diverse biological functions, including the suppression of cell proliferation and the induction of apoptosis. Adenosine has been reported to induce apoptosis in several cancer cell lines; however, to the best of our knowledge, the effect of adenosine on head and neck cancer cells has not been investigated. Therefore, the purpose of the present study was to evaluate whether adenosine exerts any anticancer effect via induction of apoptosis in human pharyngeal squamous carcinoma FaDu cells. An MTT assay demonstrated that adenosine-treated FaDu cells inhibited a dose-dependent rate of cell growth, whereas human oral keratinocytes cells were unaffected by adenosine treatment. In addition, A1 and A2a adenosine receptor mRNA was detected in FaDu cells by reverse transcription-polymerase chain reaction, and adenosine-induced FaDu cell death was significantly suppressed by treatment with ATL-444, an antagonist of these receptors. Furthermore, adenosine-induced cell growth inhibition was exerted via apoptosis, as confirmed by the analysis of DNA fragmentation, Hoechst nuclear staining and flow cytometry with Annexin V-fluorescein isothiocyanate and propidium iodide staining. Adenosine was also demonstrated to induce an increase in Bcl-associated X expression, a decrease in B-cell lymphoma 2 expression, the release of cytochrome c from mitochondria, and the activation of caspase-3, -9 and poly(ADP-ribose) polymerase in FaDu cells. Finally, phosphoinositide 3-kinase (PI3K), RAC serine/threonine-protein kinase (Akt) and mechanistic target of rapamycin (mTOR) phosphorylation was found to be significantly inhibited in adenosine-treated FaDu cells, as was phosphorylation of the mTOR downregulators, S6 kinase β1, eukaryotic translation initiation factor 4E-binding protein 1, and eukaryotic translation initiation factor 4 γ1. Taken together, these results indicate that adenosine induces apoptosis via the mitochondrial intrinsic pathway, and activates caspase-3 and -9 activity via the PI3K/Akt/mTOR signaling pathway.
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Affiliation(s)
- Mi Suk Choi
- Department of Dental Hygiene, Chodang University, Muan-ro, Muan-eup, Muan 534-701, Republic of Korea
| | - Sung-Min Moon
- CStech Research Institute, Gwangju, South Jeolla 61007, Republic of Korea
| | - Seul Ah Lee
- Department of Oral Biochemistry, College of Dentistry, Chosun University, Gwangju, South Jeolla 501-759, Republic of Korea
| | - Bo-Ram Park
- Department of Dental Hygiene, Chodang University, Muan-ro, Muan-eup, Muan 534-701, Republic of Korea
| | - Jae-Sung Kim
- Pre-Dentistry, College of Dentistry, Chosun University, Gwangju, South Jeolla 501-759, Republic of Korea
| | - Do Kyung Kim
- Department of Oral Physiology, College of Dentistry, Chosun University, Gwangju, South Jeolla 501-759, Republic of Korea
| | - Yong Hwan Kim
- Department of Crop Science and Biotechnology, College of Life and Resource Science, Cheonan, Chungnam 31116, Republic of Korea
| | - Chun Sung Kim
- Department of Oral Biochemistry, College of Dentistry, Chosun University, Gwangju, South Jeolla 501-759, Republic of Korea
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Moon SM, Lee SA, Han SH, Park BR, Choi MS, Kim JS, Kim SG, Kim HJ, Chun HS, Kim DK, Kim CS. Aqueous extract of Codium fragile alleviates osteoarthritis through the MAPK/NF-κB pathways in IL-1β-induced rat primary chondrocytes and a rat osteoarthritis model. Biomed Pharmacother 2017; 97:264-270. [PMID: 29091874 DOI: 10.1016/j.biopha.2017.10.130] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [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: 08/30/2017] [Revised: 10/12/2017] [Accepted: 10/23/2017] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Codium fragile (Suringar) Hariot has been used as a potential remedy in traditional medicine because of its anti-inflammatory and anti-oxidant effects. Osteoarthritis is a chronic progressive joint disease, characterized by complex mechanisms related to inflammation and degeneration of articular cartilage. In this study, we aimed to evaluate the cartilage protective effect of an aqueous extract of Codium fragile (AECF) using rat primary chondrocytes and the osteoarthritis animal model induced by destabilization of the medial meniscus (DMM). METHODS In vitro, rat primary cultured chondrocytes were pre-treated with AECF (0.5, 1, and 2mg/mL) for 1h and then incubated with interleukin-1β (10ng/mL) for 24h. Nitrite production was detected by the Griess reagent. Alteration of the protein levels of iNOS, MMP-13, ADAMTS-4, ADAMTS-5, mitogen-activated protein kinases (MAPKs), and nuclear factor-κB (NF-κB) was detected by western blotting. In vivo, osteoarthritis was induced by DMM of Sprague Dawley (SD) rats. The rats subjected to destabilization of the medial meniscus (DMM) surgery were orally administered with AECF (50, 100, and 200mg/kg bodyweight) or distilled water for 8w. The severity of cartilage lesions was evaluated by safranin O staining and the Osteoarthritis Research Society International (OARSI) score. RESULTS These results demonstrated that AECF significantly inhibited nitrite production and inhibited the levels of iNOS, MMP-13, ADAMTS-4, and ADAMTS-5 in interleukin-1β-induced rat primary cultured chondrocytes. Moreover, AECF suppressed interleukin-1β-induced NF-κB activation in the nucleus and phosphorylation of ERK1/2 and JNK in the cytosol. In vivo, the cartilage lesions in AECF-treated osteoarthritis rats exhibited less proteoglycan loss and lower OARSI scores. CONCLUSIONS These results suggested that AECF is a potential therapeutic agent for the alleviation of osteoarthritis progression.
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Affiliation(s)
- Sung-Min Moon
- Oral Biology Research Institute, College of Dentistry, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju, 501-759, Republic of Korea; CStech Research Institute, 38 Chumdanventuresoro, Gwangju 61007, Republic of Korea
| | - Seul Ah Lee
- Department of Oral Biochemistry, College of Dentistry, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju, 501-759, Republic of Korea
| | - Seul Hee Han
- CStech Research Institute, 38 Chumdanventuresoro, Gwangju 61007, Republic of Korea
| | - Bo-Ram Park
- Department of Dental Hygiene, Chodang University, Muan-ro, Muan-eup, Muan 534-701, Republic of Korea
| | - Mi Suk Choi
- Department of Dental Hygiene, Chodang University, Muan-ro, Muan-eup, Muan 534-701, Republic of Korea
| | - Jae-Sung Kim
- Oral Biology Research Institute, College of Dentistry, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju, 501-759, Republic of Korea
| | - Su-Gwan Kim
- Oral Biology Research Institute, College of Dentistry, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju, 501-759, Republic of Korea
| | - Heung-Joong Kim
- Oral Biology Research Institute, College of Dentistry, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju, 501-759, Republic of Korea
| | - Hong Sung Chun
- Department of Biomedical Science, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju, 501-759, Republic of Korea
| | - Do Kyung Kim
- Oral Biology Research Institute, College of Dentistry, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju, 501-759, Republic of Korea
| | - Chun Sung Kim
- Oral Biology Research Institute, College of Dentistry, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju, 501-759, Republic of Korea; Department of Oral Biochemistry, College of Dentistry, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju, 501-759, Republic of Korea.
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Lim HS, Kim CS, Kim JS, Yu SK, Go DS, Lee SA, Moon SM, Chun HS, Kim SG, Kim DOK. Suppression of Oral Carcinoma Oncogenic Activity by microRNA-203 via Down-regulation of SEMA6A. Anticancer Res 2017; 37:5425-5433. [PMID: 28982852 DOI: 10.21873/anticanres.11970] [Citation(s) in RCA: 11] [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: 08/11/2017] [Revised: 09/01/2017] [Accepted: 09/06/2017] [Indexed: 11/10/2022]
Abstract
BACKGROUND/AIM The purpose of this study was to elucidate the molecular mechanism underlying regulation of semaphorin-6A (SEMA6A) involving microRNA-203 (miR-203) as a tumor suppressor in YD-38 human oral cancer cells. MATERIALS AND METHODS miRNA arrays, polymerase chain reaction analyses, MTT assays, immunoblotting, and luciferase assays were carried out in YD-38 cells. RESULTS MiRNA microarray results showed that expression of miR-203 was significantly down-regulated in YD-38 cells compared to normal human oral keratinocytes. The viability of YD-38 cells was reduced by miR-203 in time- and dose-dependent manners. Overexpression of miR-203 increased the nuclear condensation of YD-38 cells and activated the apoptotic signaling pathway by up-regulating pro-apoptotic factors, such as BCL-2-associated X protein (BAX) and BCL-2 homologous antagonist killer (BAK), and the active forms of caspase-9, caspase-3, and poly-(ADP-ribose)-polymerase (PARP). Furthermore, target gene array analyses revealed that the expression of class 6 semaphorin A (SEMA6A) was down-regulated by miR-203 in YD-38 cells. Both the mRNA and protein levels of SEMA6A were reduced in YD-38 cells transfected with miR-203. Luciferase activity assay confirmed that miR-203 directly targets the SEMA6A 3'-untranslated region to suppress gene expression. CONCLUSION Our results indicate that miR-203 induces the apoptosis of YD-38 human oral cancer cells by directly targeting SEMA6A, suggesting its potential application in anticancer therapeutics.
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Affiliation(s)
- Hyoung-Sup Lim
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Chun Sung Kim
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Jae-Sung Kim
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Sun-Kyoung Yu
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Dae-San Go
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Seul Ah Lee
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Sung Min Moon
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - Hong Sung Chun
- Department of Biomedical Science, Chosun University, Gwangju, Republic of Korea
| | - Su Gwan Kim
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju, Republic of Korea
| | - DO Kyung Kim
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju, Republic of Korea
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Seo MH, Won EJ, Hong YJ, Chun S, Kwon JR, Choi YS, Kim JN, Lee SA, Lim AH, Kim SH, Park KU, Cho D. An effective diagnostic strategy for accurate detection of RhD variants including Asian DEL type in apparently RhD-negative blood donors in Korea. Vox Sang 2016; 111:425-430. [PMID: 27864976 DOI: 10.1111/vox.12450] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [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: 04/03/2016] [Revised: 08/16/2016] [Accepted: 08/17/2016] [Indexed: 01/26/2023]
Abstract
BACKGROUND AND OBJECTIVES The purpose of this study was to provide an effective RHD genotyping strategy for the East Asian blood donors. MATERIAL AND METHODS RhD phenotyping, weak D testing and RhCE phenotyping were performed on 110 samples from members of the RhD-negative club, private organization composed of RhD-negative blood donors, in the GwangJu-Chonnam region of Korea. The RHD promoter, intron 4, and exons 7 and 10 were analysed by real-time PCR. Two nucleotide changes (c.1227 G>A, and c.1222 T>C) in exon 9 were analysed by sequencing. RESULTS Of 110 RhD-negative club members, 79 (71·8%) showed complete deletion of the RHD gene, 10 (9·1%) showed results consistent with RHD-CE-D hybrid, and 21 (19·1%) showed amplification of RHD promoter, intron 4, and exons 7 and 10. Of the latter group, 16 (14·5%) were in the DEL blood group including c.1227 G>A (N = 14) and c.1222 T>C (N = 2), 2 (1·8%) were weak D, 1(0·9%) was partial D, and 2 (1·8%) were undetermined. The RhD-negative phenotype samples consisted of 58 C-E-c+e+, 19 C-E+c+e+, 3 C-E+c+e-, 21 C+E-c+e-, 6 C+E-c+e+ and 3 C+E-c-e + . Notably, all 58 samples with the C-E-c+e+ phenotype were revealed to have complete deletion of the RHD gene. The C-E-c+e+ phenotype showed 100% positive predictive value for detecting D-negative cases. CONCLUSIONS RHD genotyping is not required in half of D-negative cases. We suggest here an effective RHD genotyping strategy for accurate detection of RhD variants in apparently RhD-negative blood donors in East Asia.
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Affiliation(s)
- M H Seo
- Department of Biomedical Sciences, Chonnam National University, Gwangju, Korea
| | - E J Won
- Department of Laboratory Medicine, Chonnam National University Hospital, Gwangju, Korea
| | - Y J Hong
- Department of Laboratory Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - S Chun
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunwan University School of Medicine, Seoul, Korea
| | - J R Kwon
- The Division of Human Blood Safety Surveillance, Korea Centers for Disease Control and Prevention, Cheongwon, Korea
| | - Y S Choi
- The Division of Human Blood Safety Surveillance, Korea Centers for Disease Control and Prevention, Cheongwon, Korea
| | - J N Kim
- The Division of Human Blood Safety Surveillance, Korea Centers for Disease Control and Prevention, Cheongwon, Korea
| | - S A Lee
- Blood Transfusion Research Institute, Korean Red Cross, Wonju, Korea
| | - A H Lim
- Blood Transfusion Research Institute, Korean Red Cross, Wonju, Korea
| | - S H Kim
- Department of Laboratory Medicine, Chonnam National University Hwasun Hospital, Chonnam National University School of Medicine, Gwangju, Korea
| | - K U Park
- Department of Laboratory Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - D Cho
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunwan University School of Medicine, Seoul, Korea.,Stem Cell & Regenerative Medicine Institute, Samsung Medical Center, Seoul, Korea
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Lee SA, Kong C, Adeola O, Kim BG. Different Coefficients and Exponents for Metabolic Body Weight in a Model to Estimate Individual Feed Intake for Growing-finishing Pigs. Asian-Australas J Anim Sci 2016; 29:1756-1760. [PMID: 27608642 PMCID: PMC5088424 DOI: 10.5713/ajas.16.0420] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Revised: 08/03/2016] [Accepted: 08/11/2016] [Indexed: 11/27/2022]
Abstract
Estimation of feed intake (FI) for individual animals within a pen is needed in situations where more than one animal share a feeder during feeding trials. A partitioning method (PM) was previously published as a model to estimate the individual FI (IFI). Briefly, the IFI of a pig within the pen was calculated by partitioning IFI into IFI for maintenance (IFIm) and IFI for growth. In the PM, IFIm is determined based on the metabolic body weight (BW), which is calculated using the coefficient of 106 and exponent of 0.75. Two simulation studies were conducted to test the hypothesis that the use of different coefficients and exponents for metabolic BW to calculate IFIm improves the accuracy of the estimates of IFI for pigs, and that PM is applied to pigs fed in group-housing systems. The accuracy of prediction represented by difference between actual and estimated IFI was compared using PM, ratio (RM), or averaging method (AM). In simulation studies 1 and 2, the PM estimated IFI better than the AM and RM during most of the periods (p<0.05). The use of 0.60 as the exponent and the coefficient of 197 to calculate metabolic BW did not improve the accuracy of the IFI estimates in both simulation studies 1 and 2. The results imply that the use of 197 kcal×kg BW0.60 as metabolizable energy for maintenance in PM does not improve the accuracy of IFI estimations compared with the use of 106 kcal×kg BW0.75 and that the PM estimates the IFI of pigs with greater accuracy compared with the averaging or ratio methods in group-housing systems.
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Affiliation(s)
- S A Lee
- Department of Animal Science and Technology, Konkuk University, Seoul 05029, Korea
| | - C Kong
- Department of Animal Science and Technology, Konkuk University, Seoul 05029, Korea
| | - O Adeola
- Department of Animal Sciences, Purdue University, West Lafayette, IN 47907, USA
| | - B G Kim
- Department of Animal Science and Technology, Konkuk University, Seoul 05029, Korea
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Bae JM, Lee MM, Lee SA, Lee SY, Bok KH, Kim J, Kim C. Nonheme iron complex-catalyzed efficient alcohol oxidation by t-BuOOH with N-hydroxyphthalimide (NHPI) as co-catalyst: Implication of high valent iron-oxo species. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2016.06.038] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Ryu HS, Lee SA, Lee GH, Chung YS, Kim WS. Subjective apnoea symptoms are associated with daytime sleepiness in patients with moderate and severe obstructive sleep apnoea: a retrospective study. Clin Otolaryngol 2016; 41:395-401. [PMID: 27086649 DOI: 10.1111/coa.12659] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/11/2016] [Indexed: 11/28/2022]
Abstract
OBJECTIVES Most previous studies have failed to show a relation between daytime sleepiness and apnoea severity in patients with obstructive sleep apnoea (OSA). We determined the relation between daytime sleepiness and subjective and objective apnoea severity in newly diagnosed patients with moderate-to-severe OSA. DESIGN Retrospective cross-sectional study. SETTING Tertiary referral centre. PARTICIPANTS A total of 559 adults with newly diagnosed moderate and severe OSA. MAIN OUTCOME MEASURES Daytime sleepiness was evaluated using the Epworth Sleepiness Scale (ESS). Subjective and objective apnoea severities were assessed using the Sleep Breathing Scale (SBS) and polysomnography respectively. Sleep quality and depressive symptoms were evaluated using Medical Outcomes Study-Sleep Scale and Beck Depression Inventory (BDI) respectively. RESULTS The mean ESS score was 9.8 (SD 5.0). ESS score was correlated with SBS score (P < 0.001), apnoea-hypopnoea index (AHI) (P = 0.027), minimal oxygen saturation (MinSaO2 ) (P = 0.021), body mass index (BMI) (P = 0.007) and BDI score (P < 0.001). Linear regression analysis showed that higher SBS (P = 0.005) and BDI scores (P < 0.001) were associated with higher ESS score after controlling for gender, BMI and AHI. Apnoea-hypopnoea index, MinSaO2 and BMI were not independently related to ESS score. CONCLUSIONS Daytime sleepiness was related to subjective OSA symptoms but not objective apnoea severity measured by polysomnography in patients with moderate-to-severe OSA. These findings suggest the usefulness of the subjective apnoea severity as an indicator of OSA disease severity.
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Affiliation(s)
- H S Ryu
- Department of Neurology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - S A Lee
- Department of Neurology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - G H Lee
- Department of Neurology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Y S Chung
- Department of Otolaryngology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - W S Kim
- Department of Pulmonary Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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41
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Abstract
A new colorimetric chemosensor for Mn(iii) and Mn(ii) was developed and used to differentiate between Mn(iii) and Mn(ii).
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Affiliation(s)
- Seul Ah Lee
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743
- Korea
| | - Jae Jun Lee
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743
- Korea
| | - Ga Rim You
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743
- Korea
| | - Ye Won Choi
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743
- Korea
| | - Cheal Kim
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743
- Korea
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42
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Lee JJ, Lee SA, Kim H, Nguyen L, Noh I, Kim C. A highly selective CHEF-type chemosensor for monitoring Zn2+ in aqueous solution and living cells. RSC Adv 2015. [DOI: 10.1039/c5ra05080d] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
A new quinolone-based chemosensor was synthesized and successfully applied to quantify and image Zn2+ in water samples and living cells.
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Affiliation(s)
- Jae Jun Lee
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743
- Republic of Korea
| | - Seul Ah Lee
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743
- Republic of Korea
| | - Hyun Kim
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743
- Republic of Korea
| | - LeTuyen Nguyen
- Department of Chemical and Biomolecular Engineering, and Convergence Program of Biomedical Engineering and Biomaterials
- Seoul National University of Science & Technology
- Seoul 139-743
- Republic of Korea
| | - Insup Noh
- Department of Chemical and Biomolecular Engineering, and Convergence Program of Biomedical Engineering and Biomaterials
- Seoul National University of Science & Technology
- Seoul 139-743
- Republic of Korea
| | - Cheal Kim
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743
- Republic of Korea
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Kim YS, Park GJ, Lee SA, Kim C. A colorimetric chemosensor for the sequential detection of copper ion and amino acids (cysteine and histidine) in aqueous solution. RSC Adv 2015. [DOI: 10.1039/c5ra00544b] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [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
A simple and selective colorimetric chemosensor was reported for the sequential detection of Cu2+, cysteine and histidine.
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Affiliation(s)
- Yong Sung Kim
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743
- Korea
| | - Gyeong Jin Park
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743
- Korea
| | - Seul Ah Lee
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743
- Korea
| | - Cheal Kim
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743
- Korea
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Kim JS, Park MG, Lee SA, Park SY, Kim HJ, Yu SK, Kim CS, Kim SG, Oh JS, You JS, Kim JS, Seo YS, Chun HS, Park JC, Kim DK. Downregulation of adenomatous polyposis coli by microRNA-663 promotes odontogenic differentiation through activation of Wnt/beta-catenin signaling. Biochem Biophys Res Commun 2014; 446:894-900. [PMID: 24642258 DOI: 10.1016/j.bbrc.2014.03.027] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Accepted: 03/08/2014] [Indexed: 10/25/2022]
Abstract
MicroRNAs (miRNAs) regulate cell differentiation by inhibiting mRNA translation or by inducing its degradation. However, the role of miRNAs in odontogenic differentiation is largely unknown. In this present study, we observed that the expression of miR-663 increased significantly during differentiation of MDPC-23 cells to odontoblasts. Furthermore, up-regulation of miR-663 expression promoted odontogenic differentiation and accelerated mineralization without proliferation in MDPC-23 cells. In addition, target gene prediction for miR-663 revealed that the mRNA of the adenomatous polyposis coli (APC) gene, which is associated with the Wnt/β-catenin signaling pathway, has a miR-663 binding site in its 3'-untranslated region (3'UTR). Furthermore, APC expressional was suppressed significantly by miR-663, and this down-regulation of APC expression triggered activation of Wnt/β-catenin signaling through accumulation of β-catenin in the nucleus. Taken together, these findings suggest that miR-663 promotes differentiation of MDPC-23 cells to odontoblasts by targeting APC-mediated activation of Wnt/β-catenin signaling. Therefore, miR-663 can be considered a critical regulator of odontoblast differentiation and can be utilized for developing miRNA-based therapeutic agents.
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Affiliation(s)
- Jae-Sung Kim
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju 501-759, Republic of Korea
| | - Min-Gyeong Park
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju 501-759, Republic of Korea
| | - Seul Ah Lee
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju 501-759, Republic of Korea
| | - Sun-Young Park
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju 501-759, Republic of Korea
| | - Heung-Joong Kim
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju 501-759, Republic of Korea
| | - Sun-Kyoung Yu
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju 501-759, Republic of Korea
| | - Chun Sung Kim
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju 501-759, Republic of Korea
| | - Su-Gwan Kim
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju 501-759, Republic of Korea
| | - Ji-Su Oh
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju 501-759, Republic of Korea
| | - Jae-Seek You
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju 501-759, Republic of Korea
| | - Jin-Soo Kim
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju 501-759, Republic of Korea
| | - Yo-Seob Seo
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju 501-759, Republic of Korea
| | - Hong Sung Chun
- Department of Biomedical Science, Chosun University, Gwangju 501-759, Republic of Korea
| | - Joo-Cheol Park
- Department of Oral Histology-Developmental Biology, School of Dentistry and Dental Research Institute, BK 21, Seoul National University, Seoul 110-749, Republic of Korea
| | - Do Kyung Kim
- Oral Biology Research Institute, School of Dentistry, Chosun University, Gwangju 501-759, Republic of Korea.
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Yang SJ, Lee SA, Park MG, Kim JS, Yu SK, Kim CS, Kim JS, Kim SG, Oh JS, Kim HJ, Chun HS, Kim YH, Kim DK. Induction of apoptosis by diphenyldifluoroketone in osteogenic sarcoma cells is associated with activation of caspases. Oncol Rep 2014; 31:2286-92. [PMID: 24604218 DOI: 10.3892/or.2014.3066] [Citation(s) in RCA: 19] [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] [Received: 12/28/2013] [Accepted: 02/18/2014] [Indexed: 11/06/2022] Open
Abstract
The aim of the present study was to investigate and compare the effects of diferuloylmethane (curcumin) and diphenyldifluoroketone (EF-24) on cell growth and apoptosis induction in human osteogenic sarcoma cells. This was examined by MTT assay, nuclear DAPI staining, caspase-activation assay, flow cytometry analysis and immunoblotting in Saos2 human osteogenic sarcoma cells. Curcumin and EF-24 inhibited the growth of Saos2 cells in a dose-dependent manner. The apparent potency of EF-24 was more than 3-fold higher that of curcumin. Treatment with curcumin or EF-24 resulted in nuclear condensation and fragmentation in the cells. The caspase-3/-7 activities were detected in living cells treated with curcumin or EF-24. Flow cytometry showed that the rate of apoptosis was increased by curcumin and EF-24 compared to the control. Curcumin and EF-24 promoted the proteolytic cleavages of procaspase-3/-7/-8/-9 with increases in the amount of cleaved caspase-3/-7/-8/-9. The curcumin- or EF-24-induced apoptosis in the Saos2 cells was mediated by the expression of Fas and activation of caspase-8, caspase-3 and poly(ADP-ribose) polymerase. Immunoblotting revealed the Bid and Bcl-2 proteins to be downregulated, and truncated-Bid, Bax and p53 proteins to be upregulated by curcumin and EF-24. Curcumin and EF-24 increased the Bax/Bcl-2 ratio significantly. These results suggest that the curcumin and EF-24 inhibit cell proliferation and induce apoptotic cell death in Saos2 human osteogenic sarcoma cells via both the mitochondria-mediated intrinsic pathway and the death receptor-mediated extrinsic pathway, and may have potential properties for anti-osteosarcoma drug discovery.
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Affiliation(s)
- Seok-Jin Yang
- Oral Biology Research Institute, Chosun University, Gwangju 501-75, Republic of Korea
| | - Seul Ah Lee
- Oral Biology Research Institute, Chosun University, Gwangju 501-75, Republic of Korea
| | - Min-Gyeong Park
- Oral Biology Research Institute, Chosun University, Gwangju 501-75, Republic of Korea
| | - Jae-Sung Kim
- Oral Biology Research Institute, Chosun University, Gwangju 501-75, Republic of Korea
| | - Sun-Kyoung Yu
- Oral Biology Research Institute, Chosun University, Gwangju 501-75, Republic of Korea
| | - Chun Sung Kim
- Oral Biology Research Institute, Chosun University, Gwangju 501-75, Republic of Korea
| | - Jin-Soo Kim
- Oral Biology Research Institute, Chosun University, Gwangju 501-75, Republic of Korea
| | - Su-Gwan Kim
- Oral Biology Research Institute, Chosun University, Gwangju 501-75, Republic of Korea
| | - Ji-Su Oh
- Oral Biology Research Institute, Chosun University, Gwangju 501-75, Republic of Korea
| | - Heung-Joong Kim
- Oral Biology Research Institute, Chosun University, Gwangju 501-75, Republic of Korea
| | - Hong Sung Chun
- Department of Biotechnology, Chosun University, Gwangju 501-759, Republic of Korea
| | - Yong Hwan Kim
- Korea Institute of Planning and Evaluation for Technology in Food, Agriculture Forestry and Fisheries, Gyeonggi-do 431-810, Republic of Korea
| | - Do Kyung Kim
- Oral Biology Research Institute, Chosun University, Gwangju 501-75, Republic of Korea
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46
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Yun DW, Lee SA, Park MG, Kim JS, Yu SK, Park MR, Kim SG, Oh JS, Kim CS, Kim HJ, Kim JS, Chun HS, Kanai Y, Endou H, Wempe MF, Kim DK. JPH203, an L-type amino acid transporter 1-selective compound, induces apoptosis of YD-38 human oral cancer cells. J Pharmacol Sci 2014; 124:208-17. [PMID: 24492461 DOI: 10.1254/jphs.13154fp] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
Compared to most normal cells that express L-type amino acid transporter 2, L-type amino acid transporter 1 is highly expressed in cancer cells and presumed to support their elevated growth and proliferation. This study examined JPH203, a potent and selective L-type amino acid transporter 1 inhibitor, and its ability to suppress YD-38 human oral cancer cell growth. The YD-38 cells express L-type amino acid transporter 1 with its associating protein 4F2 heavy chain, but not L-type amino acid transporter 2. JPH203 and BCH, a non-selective L-type amino acid transporter inhibitor, completely inhibited l-leucine uptake in YD-38 cells. As expected, the intrinsic affinity of JPH203 to inhibit l-leucine uptake was far more efficient than BCH. Likewise, JPH203 and BCH inhibited YD-38 cell growth, with JPH203 being superior to BCH. JPH203 up-regulated the population of apoptotic YD-38 cells through the activation of apoptotic factors, including caspases and PARP. These results suggest that the inhibition of L-type amino acid transporter 1 activity via JPH203, which may act as a potential novel anti-oral-cancer agent, leads to apoptosis by inducing the intracellular depletion of the neutral amino acids essential for cancer cell growth in YD-38 human oral cancer cells.
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Affiliation(s)
- Dae-Woong Yun
- Oral Biology Research Institute, Chosun University School of Dentistry, Korea
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Park MG, Kim JS, Park SY, Lee SA, Kim HJ, Kim CS, Kim JS, Chun HS, Park JC, Kim DK. MicroRNA-27 promotes the differentiation of odontoblastic cell by targeting APC and activating Wnt/β-catenin signaling. Gene 2014; 538:266-72. [PMID: 24487055 DOI: 10.1016/j.gene.2014.01.045] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2013] [Revised: 01/09/2014] [Accepted: 01/14/2014] [Indexed: 12/31/2022]
Abstract
MicroRNAs (miRNAs) play an essential role in regulating cell differentiation either by inhibiting mRNA translation or by inducing its degradation. However, the role of miRNAs in odontoblastic cell differentaion is largely unknown. In the present study, we demonstrate that the expression of miR-27 was significantly increased during MDPC-23 odontoblastic cell differentiation. Furthermore, the up-regulation of miR-27 promotes the differentiation of MDPC-23 odontoblastic cells and accelerates mineralization without cell proliferation. In addition, our results of target gene prediction revealed that the mRNA of adenomatous polyposis coli (APC) associated with Wnt/β-catenin signaling pathway has miR-27 binding site in the its 3' UTR and is suppressed by miR-27. Subsequentially, the down-regulated APC by miR-27 triggered the activation of Wnt/β-catenin signaling through accumulation of β-catenin in the nucleus. Our data suggest that miR-27 promotes MDPC-23 odontoblastic cell differentiation by targeting APC and activating Wnt/β-catenin signaling. Therefore, miR-27 might be considered a critical candidate as an odontoblastic differentiation molecular target for the development of miRNA based therapeutic agents in the dental medicine.
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Affiliation(s)
- Min-Gyeong Park
- Oral Biology Research Institute, Chosun University School of Dentistry, Gwangju 501-759, Republic of Korea
| | - Jae-Sung Kim
- Oral Biology Research Institute, Chosun University School of Dentistry, Gwangju 501-759, Republic of Korea
| | - Sun-Young Park
- Oral Biology Research Institute, Chosun University School of Dentistry, Gwangju 501-759, Republic of Korea
| | - Seul Ah Lee
- Oral Biology Research Institute, Chosun University School of Dentistry, Gwangju 501-759, Republic of Korea
| | - Heung-Joong Kim
- Oral Biology Research Institute, Chosun University School of Dentistry, Gwangju 501-759, Republic of Korea
| | - Chun Sung Kim
- Oral Biology Research Institute, Chosun University School of Dentistry, Gwangju 501-759, Republic of Korea
| | - Jin-Soo Kim
- Oral Biology Research Institute, Chosun University School of Dentistry, Gwangju 501-759, Republic of Korea
| | - Hong Sung Chun
- Department of Biotechnology, Chosun University, Gwangju 501-759, Republic of Korea
| | - Joo-Cheol Park
- Department of Oral Histology-Developmental Biology, School of Dentistry and Dental Research Institute, BK 21, Seoul National University, Seoul 110-749, Republic of Korea
| | - Do Kyung Kim
- Oral Biology Research Institute, Chosun University School of Dentistry, Gwangju 501-759, Republic of Korea.
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48
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Shibata T, Kojima K, Lee SA, Furumai H. Model evaluation of faecal contamination in coastal areas affected by urban rivers receiving combined sewer overflows. Water Sci Technol 2014; 70:430-436. [PMID: 25098871 DOI: 10.2166/wst.2014.225] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Odaiba seaside park is one of the most popular waterfronts in Tokyo Bay, but is easily affected by wet weather pollutant loads through combined sewer overflows (CSOs). The monitoring data of Escherichia coli clearly showed high faecal contamination after a rainfall event on 9-11 November 2007. We estimated the amounts of discharge volume and E. coli pollutant loads of urban rivers receiving CSO from rainfall chambers as well as pumping stations and primary effluent discharge. The result suggested that Sumida River and Meguro River were more influential to the Odaiba coastal area than other sources including the nearest wastewater treatment plant. Subsequently, we simulated the dynamic behaviour of E. coli by a three-dimensional (3D) hydro-dynamic and water quality model. The model simulation reproduced that E. coli concentration after the rainfall event increased rapidly at first and later gradually decreased. The simulations with and without inflow pollutant loads from urban rivers suggested that the E. coli concentration can be influenced by the Meguro River just after the rainfall event and Sumida River about 1 week later. From the spatial and temporal distribution of surface E. coli concentration, after at least 6 days from the rainfall event, high faecal contamination spread to the whole of the coastal area.
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Affiliation(s)
- T Shibata
- Department of Urban Engineering, School of Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan E-mail:
| | - K Kojima
- Institute of Technology, Shimizu Corporation, 3-4-17 Etchujima, Koto-ku, Tokyo 135-8530, Japan
| | - S A Lee
- Department of Urban Engineering, School of Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan E-mail:
| | - H Furumai
- Department of Urban Engineering, School of Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan E-mail:
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Na YJ, Park GJ, Jo HY, Lee SA, Kim C. A colorimetric chemosensor based on a Schiff base for highly selective sensing of cyanide in aqueous solution: the influence of solvents. NEW J CHEM 2014. [DOI: 10.1039/c4nj01199f] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A new highly selective colorimetric chemosensor 1 shows exclusive response toward cyanide by a color change in aqueous solution.
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Affiliation(s)
- Yu Jeong Na
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743, Korea
| | - Gyeong Jin Park
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743, Korea
| | - Hyun Yong Jo
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743, Korea
| | - Seul Ah Lee
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743, Korea
| | - Cheal Kim
- Department of Fine Chemistry and Department of Interdisciplinary Bio IT Materials
- Seoul National University of Science and Technology
- Seoul 139-743, Korea
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Noh JY, Park GJ, Na YJ, Jo HY, Lee SA, Kim C. A colorimetric “naked-eye” Cu(ii) chemosensor and pH indicator in 100% aqueous solution. Dalton Trans 2014; 43:5652-6. [DOI: 10.1039/c3dt53637h] [Citation(s) in RCA: 103] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A highly selective and sensitive colorimetric Cu2+-chemosensor and pH probe for practical use in water has been developed.
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Affiliation(s)
- Jin Young Noh
- Department of Fine Chemistry
- Seoul National University of Science and Technology
- Seoul 139-743, Korea
| | - Gyeong Jin Park
- Department of Fine Chemistry
- Seoul National University of Science and Technology
- Seoul 139-743, Korea
| | - Yu Jeong Na
- Department of Fine Chemistry
- Seoul National University of Science and Technology
- Seoul 139-743, Korea
| | - Hyun Yong Jo
- Department of Fine Chemistry
- Seoul National University of Science and Technology
- Seoul 139-743, Korea
| | - Seul Ah Lee
- Department of Fine Chemistry
- Seoul National University of Science and Technology
- Seoul 139-743, Korea
| | - Cheal Kim
- Department of Fine Chemistry
- Seoul National University of Science and Technology
- Seoul 139-743, Korea
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