1
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Chen J, Cortez-Jugo C, Kim CJ, Lin Z, Wang T, De Rose R, Xu W, Wang Z, Gu Y, Caruso F. Metal-Phenolic-Mediated Assembly of Functional Small Molecules into Nanoparticles: Assembly and Bioapplications. Angew Chem Int Ed Engl 2024; 63:e202319583. [PMID: 38282100 DOI: 10.1002/anie.202319583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 01/22/2024] [Accepted: 01/25/2024] [Indexed: 01/30/2024]
Abstract
Small molecules, including therapeutic drugs and tracer molecules, play a vital role in biological processing, disease treatment and diagnosis, and have inspired various nanobiotechnology approaches to realize their biological function, particularly in drug delivery. Desirable features of a delivery system for functional small molecules (FSMs) include high biocompatibility, high loading capacity, and simple manufacturing processes, without the need for chemical modification of the FSM itself. Herein, we report a simple and versatile approach, based on metal-phenolic-mediated assembly, for assembling FSMs into nanoparticles (i.e., FSM-MPN NPs) under aqueous and ambient conditions. We demonstrate loading of anticancer drugs, latency reversal agents, and fluorophores at up to ~80 % that is mostly facilitated by π and hydrophobic interactions between the FSM and nanoparticle components. Secondary nanoparticle engineering involving coating with a polyphenol-antibody thin film or sequential co-loading of multiple FSMs enables cancer cell targeting and combination delivery, respectively. Incorporating fluorophores into FSM-MPN NPs enables the visualization of biodistribution at different time points, revealing that most of these NPs are retained in the kidney and heart 24 h post intravenous administration. This work provides a viable pathway for the rational design of small molecule nanoparticle delivery platforms for diverse biological applications.
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Affiliation(s)
- Jingqu Chen
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Christina Cortez-Jugo
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Chan-Jin Kim
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Zhixing Lin
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Tianzheng Wang
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Robert De Rose
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Wanjun Xu
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Zhaoran Wang
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Yuang Gu
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Frank Caruso
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, 3010, Australia
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2
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Alam AMMN, Kim CJ, Kim SH, Kumari S, Lee SY, Hwang YH, Joo ST. Trends in Hybrid Cultured Meat Manufacturing Technology to Improve Sensory Characteristics. Food Sci Anim Resour 2024; 44:39-50. [PMID: 38229861 PMCID: PMC10789553 DOI: 10.5851/kosfa.2023.e76] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 10/26/2023] [Accepted: 11/20/2023] [Indexed: 01/18/2024] Open
Abstract
The projected growth of global meat production over the next decade is attributed to rising income levels and population expansion. One potentially more pragmatic approach to mitigating the adverse externalities associated with meat production involves implementing alterations to the production process, such as transitioning to cultured meat, hybrid cultured meat, and meat alternatives. Cultured meat (CM) is derived from animal stem cells and undergoes a growth and division process that closely resembles the natural in vivo cellular development. CM is emerging as a widely embraced substitute for traditional protein sources, with the potential to alleviate the future strain on animal-derived meat production. To date, the primary emphasis of cultured meat research and production has predominantly been around the ecological advantages and ethical considerations pertaining to animal welfare. However, there exists substantial study potential in exploring consumer preferences with respect to the texture, color, cuts, and sustainable methodologies associated with cultured meat. The potential augmentation of cultured meat's acceptance could be facilitated through the advancement of a wider range of cuts to mimic real muscle fibers. This review examines the prospective commercial trends of hybrid cultured meat. Subsequently, the present state of research pertaining to the advancement of scaffolding, coloration, and muscle fiber development in hybrid cultured meat, encompassing plant-based alternatives designed to emulate authentic meat, has been deliberated. However, this discussion highlights the obstacles that have arisen in current procedures and proposes future research directions for the development of sustainable cultured meat and meat alternatives, such as plant-based meat production.
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Affiliation(s)
- AMM Nurul Alam
- Division of Applied Life Science (BK21
Four), Gyeongsang National University, Jinju 52828,
Korea
| | - Chan-Jin Kim
- Division of Applied Life Science (BK21
Four), Gyeongsang National University, Jinju 52828,
Korea
| | - So-Hee Kim
- Division of Applied Life Science (BK21
Four), Gyeongsang National University, Jinju 52828,
Korea
| | - Swati Kumari
- Division of Applied Life Science (BK21
Four), Gyeongsang National University, Jinju 52828,
Korea
| | - Seung-Yun Lee
- Division of Animal Science, Gyeongsang
National University, Jinju 52828, Korea
| | - Young-Hwa Hwang
- Institute of Agriculture & Life
Science, Gyeongsang National University, Jinju 52828,
Korea
| | - Seon-Tea Joo
- Division of Applied Life Science (BK21
Four), Gyeongsang National University, Jinju 52828,
Korea
- Division of Animal Science, Gyeongsang
National University, Jinju 52828, Korea
- Institute of Agriculture & Life
Science, Gyeongsang National University, Jinju 52828,
Korea
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3
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Joo ST, Lee EY, Son YM, Hossain MJ, Kim CJ, Kim SH, Hwang YH. Aging mechanism for improving the tenderness and taste characteristics of meat. J Anim Sci Technol 2023; 65:1151-1168. [PMID: 38616883 PMCID: PMC11007300 DOI: 10.5187/jast.2023.e110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 10/07/2023] [Accepted: 10/10/2023] [Indexed: 04/16/2024]
Abstract
Tenderness and taste characteristics of meat are the key determinants of the meat choices of consumers. This review summarizes the contemporary research on the molecular mechanisms by which postmortem aging of meat improves the tenderness and taste characteristics. The fundamental mechanism by which postmortem aging improves the tenderness of meat involves the operation of the calpain system due to apoptosis, resulting in proteolytic enzyme-induced degradation of cytoskeletal myofibrillar proteins. The improvement of taste characteristics by postmortem aging is mainly explained by the increase in the content of taste-related peptides, free amino acids, and nucleotides produced by increased hydrolysis activity. This review improves our understanding of the published research on tenderness and taste characteristics of meat and provides insights to improve these attributes of meat through postmortem aging.
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Affiliation(s)
- Seon-Tea Joo
- Division of Applied Life Science (BK21
Four), Gyeongsang National University, Jinju 52828,
Korea
- Institute of Agriculture & Life
Science, Gyeongsang National University, Jinju 52828,
Korea
| | - Eun-Yeong Lee
- Division of Applied Life Science (BK21
Four), Gyeongsang National University, Jinju 52828,
Korea
| | - Yu-Min Son
- Division of Applied Life Science (BK21
Four), Gyeongsang National University, Jinju 52828,
Korea
| | - Md. Jakir Hossain
- Division of Applied Life Science (BK21
Four), Gyeongsang National University, Jinju 52828,
Korea
| | - Chan-Jin Kim
- Division of Applied Life Science (BK21
Four), Gyeongsang National University, Jinju 52828,
Korea
| | - So-Hee Kim
- Division of Applied Life Science (BK21
Four), Gyeongsang National University, Jinju 52828,
Korea
| | - Young-Hwa Hwang
- Institute of Agriculture & Life
Science, Gyeongsang National University, Jinju 52828,
Korea
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Abstract
ConspectusFunctional ligands consist of a wide range of small or large molecules that exhibit a spectrum of physical, chemical, and biological properties. A suite of small molecules (e.g., peptides) or macromolecular ligands (e.g., antibodies and polymers) have been conjugated to particle surfaces for specific applications. However, postfunctionalization of ligands often presents challenges in controlling the surface density and may require the chemical modification of ligands. As an alternative option to postfunctionalization, our work has focused on using functional ligands as building blocks to assemble particles while maintaining their intrinsic (functional) properties. Through self-assembly or template-mediated assembly strategies, we have developed a range of protein-, peptide-, DNA-, polyphenol-, glycogen-, and polymer-based particles. This Account discusses the assembly of such nanoengineered particles, which includes self-assembled nanoparticles, hollow capsules, replica particles, and core-shell particles, according to three categories of functional ligands (i.e., small molecules, polymers, and biomacromolecules) that are used as building blocks for their formation. We discuss a range of covalent and noncovalent interactions among ligand molecules that have been explored to facilitate the assembly of particles. The physicochemical properties of the particles, including size, shape, surface charge, permeability, stability, thickness, stiffness, and stimuli-responsiveness, can be readily controlled by varying the ligand building block or by tuning the assembly method. By selecting specific ligands as building blocks, the bio-nano interactions (i.e., stealth, targeting, and cell trafficking) can also be modulated. For instance, particles composed mainly of low-fouling polymers (i.e., poly(ethylene glycol)) exhibit an extended blood circulation time (half-life > 12 h), while antibody-based nanoparticles demonstrate that a trade-off between stealth and targeting may be required when designing targeting nanoparticle systems. Small molecular ligands, such as polyphenols, have been used as building blocks for particle assembly as they can interact with various biomacromolecules through multiple noncovalent interactions, retain the function of biomacromolecules within the assembly, enable pH-responsive disassembly when coordinating with metal ions, and facilitate endosomal escape of nanoparticles. A perspective is provided on the current challenges associated with the clinical translation of ligand-based nanoparticles. This Account is also expected to serve as a reference to guide the fundamental research and development of functional particle systems assembled from various ligands for diverse applications.
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Affiliation(s)
- Yi Ju
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
- School of Science, RMIT University, Melbourne, Victoria 3000, Australia
| | - Chan-Jin Kim
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Frank Caruso
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
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Xu W, Pan S, Noble BB, Lin Z, Bhangu SK, Kim CJ, Chen J, Han Y, Yarovsky I, Caruso F. Engineering Flexible Metal‒Phenolic Networks with Guest Responsiveness via Intermolecular Interactions. Angew Chem Int Ed Engl 2023. [DOI: 10.1002/ange.202302448] [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: 03/07/2023]
Affiliation(s)
- Wanjun Xu
- The University of Melbourne Chemical Engineering AUSTRALIA
| | - Shuaijun Pan
- The University of Melbourne Chemical Engineering AUSTRALIA
| | | | - Zhixing Lin
- The University of Melbourne Chemical Engineering AUSTRALIA
| | | | - Chan-Jin Kim
- The University of Melbourne Chemical Engineering AUSTRALIA
| | - Jingqu Chen
- The University of Melbourne Chemical Engineering AUSTRALIA
| | - Yiyuan Han
- The University of Melbourne Chemical Engineering AUSTRALIA
| | - Irene Yarovsky
- The University of Melbourne Chemical Engineering AUSTRALIA
| | - Frank Caruso
- The University of Melbourne Department of Chemical Engineering Grattan St 3010 Parkville AUSTRALIA
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Qu Y, De Rose R, Kim CJ, Zhou J, Lin Z, Ju Y, Bhangu SK, Cortez-Jugo C, Cavalieri F, Caruso F. Supramolecular Polyphenol–DNA Microparticles for In Vivo Adjuvant and Antigen Co‐Delivery and Immune Stimulation. Angew Chem Int Ed Engl 2023. [DOI: 10.1002/ange.202214935] [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: 01/28/2023]
Affiliation(s)
- Yijiao Qu
- The University of Melbourne Chemical Engineering AUSTRALIA
| | - Robert De Rose
- The University of Melbourne Chemical Engineering AUSTRALIA
| | - Chan-Jin Kim
- The University of Melbourne Chemical Engineering AUSTRALIA
| | - Jiajing Zhou
- The University of Melbourne Chemical Engineering AUSTRALIA
| | - Zhixing Lin
- The University of Melbourne Chemical Engineering AUSTRALIA
| | - Yi Ju
- The University of Melbourne Chemical Engineering AUSTRALIA
| | | | | | | | - Frank Caruso
- The University of Melbourne Department of Chemical Engineering Grattan St 3010 Parkville AUSTRALIA
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Ercole F, Kim CJ, Dao NV, Tse WKL, Whittaker MR, Caruso F, Quinn JF. Synthesis of Thermoresponsive, Catechol-Rich Poly(ethylene glycol) Brush Polymers for Attenuating Cellular Oxidative Stress. Biomacromolecules 2023; 24:387-399. [PMID: 36469858 DOI: 10.1021/acs.biomac.2c01211] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Herein, we report a platform to integrate customizable quantities of catechol units into polymers by reacting caffeic acid carbonic anhydride with polymers having pendant amine groups. Brush poly(ethylene glycol)-caffeamide (PEG-CAF) copolymers based on oligo(ethylene glycol)methyl ether methacrylate (OEGMA500) were obtained with a catechol content of approximately 30, 40, and 50 mol % (vs OEGMA content). Owing to the hydrophobicity of the introduced CAF groups, the catechol copolymers exhibited cloud points in the range of 23-46 °C and were used to fabricate thermoresponsive FeIII metal-phenolic network capsules. Polymers with the highest CAF content (50 mol %) proved most effective for attenuating reactive oxygen species levels in vitro, in co-cultured fibroblasts, and breast cancer cells, even in the presence of an exogenous oxidant source. The reported approach to synthesize customizable catechol materials could be generalized to other amine-functional polymers, with potential biomedical applications such as adhesives or stimuli-responsive drug delivery systems.
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Affiliation(s)
- Francesca Ercole
- Drug Delivery, Disposition and Dynamics Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia
| | - Chan-Jin Kim
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Nam V Dao
- Drug Delivery, Disposition and Dynamics Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia.,Department of Physical Chemistry and Physics, Hanoi University of Pharmacy, Hanoi 10000, Vietnam
| | - Warren K L Tse
- Department of Chemical Engineering, Faculty of Engineering, Monash University, Clayton, Victoria 3800, Australia
| | - Michael R Whittaker
- Drug Delivery, Disposition and Dynamics Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia
| | - Frank Caruso
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - John F Quinn
- Drug Delivery, Disposition and Dynamics Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia.,Department of Chemical Engineering, Faculty of Engineering, Monash University, Clayton, Victoria 3800, Australia
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Kim SH, Kim CJ, Lee EY, Son YM, Hwang YH, Joo ST. Optimal Pre-Plating Method of Chicken Satellite Cells for Cultured Meat Production. Food Sci Anim Resour 2022; 42:942-952. [PMID: 36415580 PMCID: PMC9647181 DOI: 10.5851/kosfa.2022.e61] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 09/30/2022] [Accepted: 10/05/2022] [Indexed: 12/02/2023] Open
Abstract
To establish a pre-plating method of chicken satellite cells with high purity, pre-plating was performed under culture conditions of 37°C and 41°C, and the pre-plating time was set from a total of 3 hours to 6 hours in consideration of the cell attachment time. The purity of the cells was confirmed by staining paired box protein 7 (Pax7) after proliferation, and Pax7 expression was the highest in culture flasks shaken for 2 hours after incubation at 41°C for 2 hours to prevent the attachment of satellite cells (p<0.05). Also, when pre-plating and proliferation were performed at 37°C and 41°C, the Pax7 expression rate was higher at 41°C. The differentiation capabilities of the three groups (T3, T6, and T7) with high Pax7 expression were compared and the fusion index (%) and myotube formation area (%) determined by myosin heavy chain (MHC) staining was calculated. The T6 and T7 groups, which were cultured at 41°C, showed significantly higher values than the T3 group (p<0.05). There was no significant difference in the expression of Pax7 and MHC between the T6 and T7 groups (p>0.05). These results suggest that pre-plating at 41°C for a total of 4 hours was the most efficient in terms of cost and time for purifying chicken satellite cells for cultured meat.
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Affiliation(s)
- So-Hee Kim
- Division of Applied Life Science (BK21
Four), Gyeongsang National University, Jinju 52852,
Korea
| | - Chan-Jin Kim
- Division of Applied Life Science (BK21
Four), Gyeongsang National University, Jinju 52852,
Korea
| | - Eun-Yeong Lee
- Division of Applied Life Science (BK21
Four), Gyeongsang National University, Jinju 52852,
Korea
| | - Yu-Min Son
- Division of Applied Life Science (BK21
Four), Gyeongsang National University, Jinju 52852,
Korea
| | - Young-Hwa Hwang
- Institute of Agriculture & Life
Science, Gyeongsang National University, Jinju 52852,
Korea
| | - Seon-Tea Joo
- Division of Applied Life Science (BK21
Four), Gyeongsang National University, Jinju 52852,
Korea
- Institute of Agriculture & Life
Science, Gyeongsang National University, Jinju 52852,
Korea
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9
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Hu X, Park JE, Kang S, Kim CJ, Kim Y, Hyun JK, Park SJ. Free-standing two-dimensional sheets of polymer-linked nanoparticles. Nanoscale 2022; 14:12849-12855. [PMID: 36039954 DOI: 10.1039/d2nr03375e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Here, we report a simple and general approach to fabricate free-standing two-dimensional (2D) sheets of nanoparticles by the simultaneous self-assembly of hydrophobic nanoparticles and hydrophilic polymers at the liquid-liquid interface. The nanoparticle-polymer interaction at the interface generates well-defined 2D sheets of densely packed nanoparticles with a lateral dimension of tens of micrometers. The nanosheets transferred in water are stable over months without any additional cross-linking step. The method is applicable for a broad range of nanoparticles including oxide, semiconductor, and metal nanoparticles as well as functional polymers.
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Affiliation(s)
- Xiaole Hu
- Department of Chemistry and Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, 03760, Korea.
| | - Ji-Eun Park
- Department of Chemistry and Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, 03760, Korea.
| | - Seulki Kang
- Department of Chemistry and Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, 03760, Korea.
| | - Chan-Jin Kim
- Department of Chemistry and Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, 03760, Korea.
| | - Youngji Kim
- Department of Chemistry and Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, 03760, Korea.
| | - Jerome Kartham Hyun
- Department of Chemistry and Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, 03760, Korea.
| | - So-Jung Park
- Department of Chemistry and Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, 03760, Korea.
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10
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Ismail I, Hwang YH, Bakhsh A, Lee SJ, Lee EY, Kim CJ, Joo ST. Control of sous-vide physicochemical, sensory, and microbial properties through the manipulation of cooking temperatures and times. Meat Sci 2022; 188:108787. [DOI: 10.1016/j.meatsci.2022.108787] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 02/26/2022] [Accepted: 03/02/2022] [Indexed: 11/30/2022]
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Bakhsh A, Lee EY, Ncho CM, Kim CJ, Son YM, Hwang YH, Joo ST. Quality Characteristics of Meat Analogs through the Incorporation of Textured Vegetable Protein: A Systematic Review. Foods 2022; 11:1242. [PMID: 35563965 PMCID: PMC9100116 DOI: 10.3390/foods11091242] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [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: 03/15/2022] [Revised: 04/19/2022] [Accepted: 04/22/2022] [Indexed: 11/27/2022] Open
Abstract
Meat analogs produced through extruded products, such as texture vegetable protein (TVP) with the addition of various plant-based ingredients are considered the products that have great potential for replacing real meat. This systematic review was conducted to summarize the evidence of the incorporation of TVP on the quality characteristics of meat analogs. Extensive literature exploration was conducted up to March 2022 for retrieving studies on the current topic in both PubMed and Scopus databases. A total of 28 articles published from 2001 to 2022 were included in the data set based on specific inclusion criteria. It appears that soy protein is by far the most used extender in meat analogs due to its low cost, availability, and several beneficial health aspects. In addition, the studies included in this review were mainly conducted in countries, such as Korea, the USA, and China. Regarding quality characteristics, textural parameters were the most assessed in the studies followed by physicochemical properties, and sensory and taste attributes. Other aspects, such as the development of TVP, the difference in quality characteristics of texturized proteins, and the usage of binding agents in various meat analogs formulations are also highlighted in detail.
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Affiliation(s)
- Allah Bakhsh
- Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju 52852, Korea; (A.B.); (E.-Y.L.); (C.-J.K.); (Y.-M.S.)
| | - Eun-Yeong Lee
- Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju 52852, Korea; (A.B.); (E.-Y.L.); (C.-J.K.); (Y.-M.S.)
| | - Chris Major Ncho
- Department of Animal Science, Gyeongsang National University, Jinju 52852, Korea;
| | - Chan-Jin Kim
- Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju 52852, Korea; (A.B.); (E.-Y.L.); (C.-J.K.); (Y.-M.S.)
| | - Yu-Min Son
- Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju 52852, Korea; (A.B.); (E.-Y.L.); (C.-J.K.); (Y.-M.S.)
| | - Young-Hwa Hwang
- Institute of Agriculture & Life Science, Gyeongsang National University, Jinju 52852, Korea;
| | - Seon-Tea Joo
- Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju 52852, Korea; (A.B.); (E.-Y.L.); (C.-J.K.); (Y.-M.S.)
- Institute of Agriculture & Life Science, Gyeongsang National University, Jinju 52852, Korea;
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12
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Bhangu SK, Charchar P, Noble BB, Kim CJ, Pan S, Yarovsky I, Cavalieri F, Caruso F. Origins of Structural Elasticity in Metal-Phenolic Networks Probed by Super-Resolution Microscopy and Multiscale Simulations. ACS Nano 2022; 16:98-110. [PMID: 34843208 DOI: 10.1021/acsnano.1c08192] [Citation(s) in RCA: 3] [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] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Metal-phenolic networks (MPNs) are amorphous materials that can be used to engineer functional films and particles. A fundamental understanding of the heat-driven structural reorganization of MPNs can offer opportunities to rationally tune their properties (e.g., size, permeability, wettability, hydrophobicity) for applications such as drug delivery, sensing, and tissue engineering. Herein, we use a combination of single-molecule localization microscopy, theoretical electronic structure calculations, and all-atom molecular dynamics simulations to demonstrate that MPN plasticity is governed by both the inherent flexibility of the metal (FeIII)-phenolic coordination center and the conformational elasticity of the phenolic building blocks (tannic acid, TA) that make up the metal-organic coordination complex. Thermal treatment (heating to 150 °C) of the flexible TA/FeIII networks induces a considerable increase in the number of aromatic π-π interactions formed among TA moieties and leads to the formation of hydrophobic domains. In the case of MPN capsules, 15 min of heating induces structural rearrangements that cause the capsules to shrink (from ∼4 to ∼3 μm), resulting in a thicker (3-fold), less porous, and higher protein (e.g., bovine serum albumin) affinity MPN shell. In contrast, when a simple polyphenol such as gallic acid is complexed with FeIII to form MPNs, rigid materials that are insensitive to temperature changes are obtained, and negligible structural rearrangement is observed upon heating. These findings are expected to facilitate the rational engineering of versatile TA-based MPN materials with tunable physiochemical properties for diverse applications.
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Affiliation(s)
- Sukhvir Kaur Bhangu
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
- School of Science, RMIT University, Victoria 3001, Australia
| | - Patrick Charchar
- School of Engineering, RMIT University, Victoria 3001, Australia
| | - Benjamin B Noble
- School of Engineering, RMIT University, Victoria 3001, Australia
| | - Chan-Jin Kim
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Shuaijun Pan
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Irene Yarovsky
- School of Engineering, RMIT University, Victoria 3001, Australia
| | - Francesca Cavalieri
- School of Science, RMIT University, Victoria 3001, Australia
- Dipartimento di Scienze e Tecnologie Chimiche, Università degli Studi di Roma "Tor Vergata", via della ricerca scientifica 1, 00133 Rome, Italy
| | - Frank Caruso
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
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13
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Joo ST, Choi JS, Hur SJ, Kim GD, Kim CJ, Lee EY, Bakhsh A, Hwang YH. A Comparative Study on the Taste Characteristics of Satellite Cell Cultured Meat Derived from Chicken and Cattle Muscles. Food Sci Anim Resour 2022; 42:175-185. [PMID: 35028582 PMCID: PMC8728501 DOI: 10.5851/kosfa.2021.e72] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 12/08/2021] [Accepted: 12/09/2021] [Indexed: 11/06/2022] Open
Abstract
This study investigated the amino acid and nucleotide-related compound composition and taste characteristics of cultured muscle tissue (CMT) obtained by culturing satellite cells isolated from chicken and cattle and compared them to those of traditional meat (TM). The content of all amino acids except valine and tyrosine was significantly different between CMT and TM (p<0.05). The amount of glutamic acid was not significantly different between CMT and TM in cattle, but the glutamic acid in chicken CMT was lower than that of TM (p<0.05). Among the nucleotide-related compounds, only the content of inosine-5'-monophosphate (IMP) was significant, and the amount of IMP in CMT derived from chicken and cattle was significantly lower than that of TM (p<0.05). There were significant differences in the taste characteristics assessed by an electronic tongue system, and the umami, bitterness, and sourness values of CMT were significantly lower than those of TM from both chicken and cattle (p<0.05). The results of the present study suggest that it is necessary to develop a satellite cell culture method that could increase the umami and bitterness intensity of CMT and adjust the composition of the growth medium to produce cultured meat with a taste similar to that of TM.
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Affiliation(s)
- Seon-Tea Joo
- Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju 52852, Korea.,Institute of Agriculture & Life Science, Gyeongsang National University, Jinju 52852, Korea
| | - Jung-Suk Choi
- Department of Animal Science, Chungbuk National University, Cheongju 28644, Korea
| | - Sun-Jin Hur
- Department of Animal Science and Technology, Chung-Ang University, Anseong 17546, Korea
| | - Gap-Don Kim
- Graduate School of International Agricultural Technology, Seoul National University, Pyeongchang 25354, Korea
| | - Chan-Jin Kim
- Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju 52852, Korea
| | - Eun-Yeong Lee
- Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju 52852, Korea
| | - Allah Bakhsh
- Division of Applied Life Science (BK21 Four), Gyeongsang National University, Jinju 52852, Korea
| | - Young-Hwa Hwang
- Institute of Agriculture & Life Science, Gyeongsang National University, Jinju 52852, Korea
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14
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Abstract
Dynamic nanostructured materials that can react to physical and chemical stimuli have attracted interest in the biomedical and materials science fields. Metal-phenolic networks (MPNs) represent a modular class of such materials: these networks form via coordination of phenolic molecules with metal ions and can be used for surface and particle engineering. To broaden the range of accessible MPN properties, we report the fabrication of thermoresponsive MPN capsules using FeIII ions and the thermoresponsive phenolic building block biscatechol-functionalized poly(N-isopropylacrylamide) (biscatechol-PNIPAM). The MPN capsules exhibited reversible changes in capsule size and shell thickness in response to temperature changes. The temperature-induced capsule size changes were influenced by the chain length of biscatechol-PNIPAM and catechol-to-FeIII ion molar ratio. The metal ion type also influenced the capsule size changes, allowing tuning of the MPN capsule mechanical properties. AlIII-based capsules, having a lower stiffness value (10.7 mN m-1), showed a larger temperature-induced size contraction (∼63%) than TbIII-based capsules, which exhibit a higher stiffness value (52.6 mN m-1) and minimal size reduction (<1%). The permeability of the MPN capsules was controlled by changing the temperature (25-50 °C)─a reduced permeability was obtained as the temperature was increased above the lower critical solution temperature of biscatechol-PNIPAM. This temperature-dependent permeability behavior was exploited to encapsulate and release model cargo (500 kDa fluorescein isothiocyanate-tagged dextran) from the capsules; approximately 70% was released over 90 min at 25 °C. This approach provides a synthetic strategy for developing dynamic and thermoresponsive-tunable MPN systems for potential applications in biological science and biotechnology.
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Affiliation(s)
- Chan-Jin Kim
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Francesca Ercole
- Drug Delivery, Disposition and Dynamics Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia
| | - Jingqu Chen
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Shuaijun Pan
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Yi Ju
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - John F Quinn
- Drug Delivery, Disposition and Dynamics Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia.,Department of Chemical Engineering, Faculty of Engineering, Monash University, Clayton, Victoria 3800, Australia
| | - Frank Caruso
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
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15
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Kim CJ, Kim GH, Jeong EH, Lee H, Park SJ. The core composition of DNA block copolymer micelles dictates DNA hybridization properties, nuclease stabilities, and cellular uptake efficiencies. Nanoscale 2021; 13:13758-13763. [PMID: 34477650 DOI: 10.1039/d1nr00756d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Here, we report how the nature of the hydrophobic core affects the molecular interactions of DNA block copolymer assemblies. Three different amphiphilic DNA block copolymers, DNA-b-polystyrene (DNA-b-PS), DNA-b-poly(2-vinylpyridine) (DNA-b-P2VP), and DNA-b-poly(methyl acrylate) (DNA-b-PMA) were synthesized and assembled into spherical micelles composed of a hydrophobic polymer core and DNA corona. Interestingly, DNA block copolymer micelles having different hydrophobic cores exhibited markedly different molecular and biological interactions. DNA-b-PS exhibited higher melting temperature, sharper melting transition, higher stability to nuclease-catalyzed DNA degradation, and higher cellular uptake efficiency compared to DNA-b-P2VP and DNA-b-PMA. The investigation of the self-assembly behavior revealed a much higher aggregation number and DNA density for DNA-b-PS micelles, which explains the superior properties of DNA-b-PS. These results demonstrate that the type of the hydrophobic core polymer, which has been largely overlooked, has a profound impact on the molecular and biological interactions of the DNA shell.
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Affiliation(s)
- Chan-Jin Kim
- Department of Chemistry and Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea.
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16
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Ghanem S, Kim CJ, Dutta D, Salifu M, Lim SH. Antimicrobial therapy during cancer treatment: Beyond antibacterial effects. J Intern Med 2021; 290:40-56. [PMID: 33372309 DOI: 10.1111/joim.13238] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 11/22/2020] [Accepted: 12/01/2020] [Indexed: 02/07/2023]
Abstract
Cancer treatment options have evolved to include immunotherapy and targeted therapy, in addition to traditional chemoradiation. Chemoradiation places the patient at a higher risk of infection through a myelosuppressive effect. High clinical suspicion and early use of antimicrobials play a major role in decreasing any associated morbidity and mortality. This has led to a widespread use of antimicrobials in cancer patients. Antimicrobial use, however, does not come without its perils. Dysbiosis caused by antimicrobial use affects responses to chemotherapeutic agents and is prognostic in the development and severity of certain cancer treatment-related complications such as graft-versus-host disease and Clostridioides difficile infections. Studies have also demonstrated that an intact gut microbiota is essential in the anticancer immune response. Antimicrobial use can therefore modulate responses and outcomes with immunotherapy targeting immune checkpoints. In this review, we highlight the perils associated with antimicrobial use during cancer therapy and the importance of a more judicious approach. We discuss the nature of the pathologic changes in the gut microbiota resulting from antimicrobial use. We explore the effect these changes have on responses and outcomes to different cancer treatment modalities including chemotherapy and immunotherapy, as well as potential adverse clinical consequences in the setting of stem cell transplant.
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Affiliation(s)
- S Ghanem
- From the, Division of Hematology and Oncology, Department of Medicine, SUNY Downstate Health Sciences University, Brooklyn, NY, USA
| | - C J Kim
- From the, Division of Hematology and Oncology, Department of Medicine, SUNY Downstate Health Sciences University, Brooklyn, NY, USA
| | - D Dutta
- From the, Division of Hematology and Oncology, Department of Medicine, SUNY Downstate Health Sciences University, Brooklyn, NY, USA
| | - M Salifu
- From the, Division of Hematology and Oncology, Department of Medicine, SUNY Downstate Health Sciences University, Brooklyn, NY, USA
| | - S H Lim
- From the, Division of Hematology and Oncology, Department of Medicine, SUNY Downstate Health Sciences University, Brooklyn, NY, USA
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17
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Kim CJ, Si Z, Reghu S, Guo Z, Zhang K, Li J, Chan-Park MB. DNA-derived nanostructures selectively capture gram-positive bacteria. Drug Deliv Transl Res 2021; 11:1438-1450. [PMID: 33880733 DOI: 10.1007/s13346-021-00975-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/31/2021] [Indexed: 10/21/2022]
Abstract
We report the first demonstration of the efficient bacteria targeting properties of DNA-based polymeric micelles with high-density DNA corona. Nanoscale polymer micelles derived from DNA-b-polystyrene (DNA-b-PS) efficiently selected most tested Gram-positive strains over Gram-negative strains; single-strand DNAs were 20-fold less selective. We demonstrate that these targeting properties were derived from the interaction between densely packed DNA strands of the micelle corona and the peptidoglycan layers of Gram-positive bacteria. DNA-b-PS micelles incorporating magnetic nanoparticles (MNPs) can efficiently capture and concentrate Gram-positive bacteria suggesting the simple applications of these DNA block copolymer micelles for concentrating bacteria. Adenine (A), thymine (T), cytosine (C), and guanine (G)-rich nanostructures were fabricated, respectively, for investigating the effect of sequence on Gram-selective bacteria targeting. T-rich micelles showed the most efficient targeting properties. The targeting properties of these DNA nanostructures toward Gram-positive bacteria may have applications as a targeted therapeutic delivery system.
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Affiliation(s)
- Chan-Jin Kim
- Centre for Antimicrobial Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Nanyang, 637459, Singapore
| | - Zhangyong Si
- Centre for Antimicrobial Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Nanyang, 637459, Singapore
| | - Sheethal Reghu
- Centre for Antimicrobial Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Nanyang, 637459, Singapore
| | - Zhong Guo
- Centre for Antimicrobial Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Nanyang, 637459, Singapore
| | - Kaixi Zhang
- Centre for Antimicrobial Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Nanyang, 637459, Singapore
| | - Jianghua Li
- Centre for Antimicrobial Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Nanyang, 637459, Singapore
| | - Mary B Chan-Park
- Centre for Antimicrobial Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Nanyang, 637459, Singapore. .,Lee Kong Chian School of Medicine, Nanyang Technological University, Nanyang, 636921, Singapore. .,School of Physical & Mathematical Sciences, Nanyang Technological University, Nanyang, 637371, Singapore.
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18
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Abstract
BACKGROUND: Long-term mortality following tuberculosis (TB) diagnosis in Korea remains unclear.METHODS: The present study used data from the National Health Insurance Service database, an extensive health-related database including most Korean residents. TB patients were identified using International Classification of Diseases, Tenth Revision coding (A15-19, U88.0-88.1) and the type of anti-TB drug(s) between 2003 and 2016. Long-term mortality and causes of death in TB patients were analysed.RESULTS: A total of 357 211 individuals had TB over the period from 2003 to 2016 and 103 682 died. The mean age of the cohort was 54.7 ± 20.7 years, and 59.8% were male. The survival probability of TB patients at 1, 5, and 10 years after diagnosis was 87.8%, 75.3%, and 63.3%, respectively. High mortality and TB-related death rates were especially prominent in the early stages after TB diagnosis. The overall standardized mortality ratio of TB patients to the general Korean population was 3.23 (95% confidence interval 3.21-3.25).CONCLUSION: Mortality in TB patients was especially high in the early stages of disease after TB diagnosis, and mostly due to TB. This figure was approximately three-times higher than the mortality rate in the general population.
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Affiliation(s)
- S C Park
- Division of Pulmonology, Department of Internal Medicine, National Health Insurance Service Ilsan Hospital, Goyang-si, Gyeonggi-do
| | - M J Kang
- Research Institute, National Health Insurance Service Ilsan Hospital, Goyang-si, Gyeonggi-do
| | - C H Han
- Division of Pulmonology, Department of Internal Medicine, National Health Insurance Service Ilsan Hospital, Goyang-si, Gyeonggi-do
| | - S M Lee
- Division of Pulmonology, Department of Internal Medicine, National Health Insurance Service Ilsan Hospital, Goyang-si, Gyeonggi-do
| | - C J Kim
- Division of Pulmonology, Department of Internal Medicine, National Health Insurance Service Ilsan Hospital, Goyang-si, Gyeonggi-do
| | - J M Lee
- Division of Pulmonology, Department of Internal Medicine, National Health Insurance Service Ilsan Hospital, Goyang-si, Gyeonggi-do
| | - Y A Kang
- Division of Pulmonology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
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19
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Abstract
We report the rational design and fabrication of unusual low-dimensional DNA nanostructures through programmable and sequence-specific peptide interactions. Dual-bioactive block copolymers composed of DNA and amino acid-based polymers (DNA-b-poly(amino acid)) were synthesized by coupling oligonucleotides to phenylalanine (Phe)-based polymers. Unlike prototypical DNA block copolymers, which typically form simple spherical micelles, DNA-b-poly(amino acid) assemble into various low-dimensional structures such as nanofibers, ribbons, and sheets through controllable amino acid interactions. Moreover, DNA-b-poly(amino acid) assemblies can undergo protease-induced fiber-to-sheet shape transformations, where the morphology change is dictated by the type of enzymes and amino acid sequences. The peptide-based self-assembly reported here provides a programmable approach to fabricate dynamic DNA assemblies with diverse and unusual low-dimensional structures.
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Affiliation(s)
- Chan-Jin Kim
- Department of Chemistry and Nanoscience , Ewha Womans University , 52 Ewhayeodae-gil, Seodaemun-gu , Seoul 03760 , Korea
| | - Ji-Eun Park
- Department of Chemistry and Nanoscience , Ewha Womans University , 52 Ewhayeodae-gil, Seodaemun-gu , Seoul 03760 , Korea
| | - Xiaole Hu
- Department of Chemistry and Nanoscience , Ewha Womans University , 52 Ewhayeodae-gil, Seodaemun-gu , Seoul 03760 , Korea
| | - Shine K Albert
- Department of Chemistry and Nanoscience , Ewha Womans University , 52 Ewhayeodae-gil, Seodaemun-gu , Seoul 03760 , Korea
| | - So-Jung Park
- Department of Chemistry and Nanoscience , Ewha Womans University , 52 Ewhayeodae-gil, Seodaemun-gu , Seoul 03760 , Korea
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20
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Kim CJ. 2835 Robot-Assisted Laparoendoscopic Single-Site (Ra-Less) Myomectomy Using Lapsingle Port. J Minim Invasive Gynecol 2019. [DOI: 10.1016/j.jmig.2019.09.452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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21
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Guenette JP, Ben-Shlomo N, Jayender J, Seethamraju RT, Kimbrell V, Tran NA, Huang RY, Kim CJ, Kass JI, Corrales CE, Lee TC. MR Imaging of the Extracranial Facial Nerve with the CISS Sequence. AJNR Am J Neuroradiol 2019; 40:1954-1959. [PMID: 31624121 DOI: 10.3174/ajnr.a6261] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 08/27/2019] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE MR imaging is not routinely used to image the extracranial facial nerve. The purpose of this study was to determine the extent to which this nerve can be visualized with a CISS sequence and to determine the feasibility of using that sequence for locating the nerve relative to tumor. MATERIALS AND METHODS Thirty-two facial nerves in 16 healthy subjects and 4 facial nerves in 4 subjects with parotid gland tumors were imaged with an axial CISS sequence protocol that included 0.8-mm isotropic voxels on a 3T MR imaging system with a 64-channel head/neck coil. Four observers independently segmented the 32 healthy subject nerves. Segmentations were compared by calculating average Hausdorff distance values and Dice similarity coefficients. RESULTS The primary bifurcation of the extracranial facial nerve into the superior temporofacial and inferior cervicofacial trunks was visible on all 128 segmentations. The mean of the average Hausdorff distances was 1.2 mm (range, 0.3-4.6 mm). Dice coefficients ranged from 0.40 to 0.82. The relative position of the facial nerve to the tumor could be inferred in all 4 tumor cases. CONCLUSIONS The facial nerve can be seen on CISS images from the stylomastoid foramen to the temporofacial and cervicofacial trunks, proximal to the parotid plexus. Use of a CISS protocol is feasible in the clinical setting to determine the location of the facial nerve relative to tumor.
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Affiliation(s)
- J P Guenette
- From the Divisions of Neuroradiology (J.P.G., J.J., V.K., N.-A.T., R.Y.H., C.J.K., T.C.L.)
| | - N Ben-Shlomo
- Otolaryngology-Head and Neck Surgery (N.B.-S., J.I.K., C.E.C), Brigham & Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - J Jayender
- From the Divisions of Neuroradiology (J.P.G., J.J., V.K., N.-A.T., R.Y.H., C.J.K., T.C.L.)
| | - R T Seethamraju
- Siemens Medical Solutions USA (R.T.S.), Boston, Massachusetts
| | - V Kimbrell
- From the Divisions of Neuroradiology (J.P.G., J.J., V.K., N.-A.T., R.Y.H., C.J.K., T.C.L.)
| | - N-A Tran
- From the Divisions of Neuroradiology (J.P.G., J.J., V.K., N.-A.T., R.Y.H., C.J.K., T.C.L.)
| | - R Y Huang
- From the Divisions of Neuroradiology (J.P.G., J.J., V.K., N.-A.T., R.Y.H., C.J.K., T.C.L.)
| | - C J Kim
- From the Divisions of Neuroradiology (J.P.G., J.J., V.K., N.-A.T., R.Y.H., C.J.K., T.C.L.)
| | - J I Kass
- Otolaryngology-Head and Neck Surgery (N.B.-S., J.I.K., C.E.C), Brigham & Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - C E Corrales
- Otolaryngology-Head and Neck Surgery (N.B.-S., J.I.K., C.E.C), Brigham & Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - T C Lee
- From the Divisions of Neuroradiology (J.P.G., J.J., V.K., N.-A.T., R.Y.H., C.J.K., T.C.L.)
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22
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Cho I, Shin SY, Kim WD, Kim YD, Cha MJ, Jung HG, Won HY, Lee WS, Kim TH, Kim CJ, Kim SW, Choi Y. P997Improving left atrial appendage occluder size determination by using 3-dimensional printing model of the left atrial appendage. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz747.0590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Introduction
Given the complexity of left atrial appendage (LAA) structure, current 2D based LAA occluder (LAAO) size prediction system using transesophageal echocardiography (TEE) has limitations.
Objective
To assess the accuracy of LAAO size determination method by implantation simulation using a 3D printed model compared with a conventional method based on TEE.
Methods
We retrospectively reviewed 57 cases with percutaneous LAAO using Amplatzer Cardiac Plug and Amulet from 2014 to 2018. We excluded cases without cardiac CT (21 cases) or with peri-device leakage or inappropriate position of the device on six months follow up TEE (6 cases), or with paroxysmal atrial fibrillation (2 cases). We finally included 28 cases with anatomically and physiologically properly implanted LAAO, using the final size of the implanted devices as a standard for the size prediction accuracy. We generated 3D printing model from cardiac CT images. LAAO size was determined with device implantation simulation using 3D printing model and occluder devices (Figure C), and conventional 2D TEE measurements by two experienced cardiologists who were blinded to the size of the finally implanted device.
Results
The accuracy in size of 3D printed left atrium (LA) models, compared with CT image sources, were validated by measuring the distance between artifacts which were intentionally implanted to LA model during image processing. There was minimal bias (−0.11 mm) between 3D images and printed LA models (Figure A). As plotted in Figure B, LAAO sizing by implantation simulation with 3D printing model showed excellent agreement with actually implanted LAAO size (r=0.927; bias=0.7±2.5), while LAAO sizing by 2D TEE measurements remained poor (r=0.544; bias 2.3±6.7).
Conclusions
LAAO size determination by using 3D printing model of LAA showed excellent accuracy. A prospective study to evaluate the clinical utility of this method should be done in future.
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Affiliation(s)
- I Cho
- Chung-Ang University Hospital, Department of Cardiology, Seoul, Korea (Republic of)
| | - S Y Shin
- Chung-Ang University Hospital, Department of Cardiology, Seoul, Korea (Republic of)
| | - W D Kim
- Chung Ang University, College of Medicine, Department of Medicine, Seoul, Korea (Republic of)
| | - Y D Kim
- Chung Ang University, College of Engineering, Department of Mechanical Engineering, Seoul, Korea (Republic of)
| | - M J Cha
- Chung-Ang University Hospital, Department of Radiology, Seoul, Korea (Republic of)
| | - H G Jung
- Chung Ang University, College of Medicine, Department of Medicine, Seoul, Korea (Republic of)
| | - H Y Won
- Chung-Ang University Hospital, Department of Cardiology, Seoul, Korea (Republic of)
| | - W S Lee
- Chung-Ang University Hospital, Department of Cardiology, Seoul, Korea (Republic of)
| | - T H Kim
- Chung-Ang University Hospital, Department of Cardiology, Seoul, Korea (Republic of)
| | - C J Kim
- Chung-Ang University Hospital, Department of Cardiology, Seoul, Korea (Republic of)
| | - S W Kim
- Chung-Ang University Hospital, Department of Cardiology, Seoul, Korea (Republic of)
| | - Y Choi
- Chung Ang University, College of Engineering, Department of Mechanical Engineering, Seoul, Korea (Republic of)
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23
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Kim CJ, Jeong EH, Lee H, Park SJ. A dynamic DNA nanostructure with switchable and size-selective molecular recognition properties. Nanoscale 2019; 11:2501-2509. [PMID: 30672552 DOI: 10.1039/c8nr09341e] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Herein, we report a dynamic DNA nanostructure exhibiting switchable and size-selective molecular recognition properties. A DNA block copolymer, polystyrene-b-DNA (PS-b-DNA), and a thermo-responsive block copolymer, PS-b-poly(N-isopropylacrylamide) (PS-b-PNIPAM), were simultaneously assembled to form hybrid micelles composed of a PS core and a DNA/PNIPAM corona. PNIPAM strands did not significantly hinder the binding of molecular DNA for a broad range of PNIPAM lengths. On the other hand, they exerted significant steric hindrance for interactions with nanoscale species, which can be reversibly turned off by increasing the temperature above the lower critical solution temperature (LCST) of PNIPAM. Owing to the switchable and size-selective steric hindrance, the hybrid DNA micelles showed thermally controllable enzymatic degradation and cellular uptake. These results demonstrate that the binary self-assembly of two different responsive block copolymers is a promising approach to prepare dynamic nanostructures with controllable biological recognition properties.
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Affiliation(s)
- Chan-Jin Kim
- Department of Chemistry and Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea.
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24
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Abstract
Here, we report one-step DNA functionalization of hydrophobic iron oxide nanoparticles (IONPs) using DNA-grafted poly(acrylic acid) (PAA- g-DNA). PAA- g-DNA was synthesized by coupling PAA to amine-modified oligonucleotides via solid-phase amide chemistry, which yielded PAA grafted with multiple DNA strands with high graft efficiencies. Synthesized PAA- g-DNA was utilized as a phase-transfer and DNA functionalization agent for hydrophobic IONPs, taking advantage of unreacted carboxylic acid groups. The resulting DNA-modified IONPs were well dispersed in aqueous solutions and possessed DNA binding properties characteristic of polyvalent DNA nanostructures, showing that this approach provides a simple one-step method for DNA functionalization of hydrophobic IONPs.
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Affiliation(s)
- Xiaole Hu
- Department of Chemistry and Nanoscience , Ewha Womans University , 52 Ewhayeodae-gil , Seodaemun-gu, Seoul 03760 , Korea
| | - Chan-Jin Kim
- Department of Chemistry and Nanoscience , Ewha Womans University , 52 Ewhayeodae-gil , Seodaemun-gu, Seoul 03760 , Korea
| | - Shine K Albert
- Department of Chemistry and Nanoscience , Ewha Womans University , 52 Ewhayeodae-gil , Seodaemun-gu, Seoul 03760 , Korea
| | - So-Jung Park
- Department of Chemistry and Nanoscience , Ewha Womans University , 52 Ewhayeodae-gil , Seodaemun-gu, Seoul 03760 , Korea
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25
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Choi Y, Hwang BH, Hwang BH, Lee WJ, Lee KY, Park HW, Kim BH, Lee KY, Byeon JH, Kim JJ, Park HW, Kim JJ, Kim CJ, Chang KY, Kim CJ, Chang KY. P2264A clinical risk score to predict the presence of obstructive coronary artery disease in asymptomatic patients with type 2 diabetes. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p2264] [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)
- Y Choi
- Seoul St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine, Seoul, Korea Republic of
| | - B H Hwang
- Seoul St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine, Seoul, Korea Republic of
| | - B H Hwang
- St.Paul's Hospital, Division of Cardiology, Department of Internal Medicine, Seoul, Korea Republic of
| | - W J Lee
- St.Paul's Hospital, Division of Cardiology, Department of Internal Medicine, Seoul, Korea Republic of
| | - K Y Lee
- St.Mary's Hospital, Division of Cardiology, Department of Internal Medicine, Incheon, Korea Republic of
| | - H W Park
- Daejeon St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine, Daejeon, Korea Republic of
| | - B H Kim
- Seoul St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine, Seoul, Korea Republic of
| | - K Y Lee
- St.Mary's Hospital, Division of Cardiology, Department of Internal Medicine, Incheon, Korea Republic of
| | - J H Byeon
- Seoul St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine, Seoul, Korea Republic of
| | - J J Kim
- Yeouido St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine, Seoul, Korea Republic of
| | - H W Park
- Daejeon St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine, Daejeon, Korea Republic of
| | - J J Kim
- Yeouido St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine, Seoul, Korea Republic of
| | - C J Kim
- Uijeongbu St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine, Uijeongbu, Korea Republic of
| | - K Y Chang
- Seoul St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine, Seoul, Korea Republic of
| | - C J Kim
- Uijeongbu St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine, Uijeongbu, Korea Republic of
| | - K Y Chang
- Seoul St. Mary's Hospital, Division of Cardiology, Department of Internal Medicine, Seoul, Korea Republic of
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Won J, Jeong HK, Hong YJ, Jeong MH, Kim YJ, Chae SC, Hong TJ, Seong IW, Chae JK, Kim CJ, Cho MC, Rha SW, Bae JH, Seung KB, Park SJ. P6438Comparative efficacy of angiotensin converting enzyme inhibitor and angiotensin receptor blocker for patients with acute myocardial infarction and renal dysfunction. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p6438] [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: 11/12/2022] Open
Affiliation(s)
- J Won
- Chonnam National University Hospital, Division of Cardiology, Gwangju, Korea Republic of
| | - H K Jeong
- Chonnam National University Hospital, Division of Cardiology, Gwangju, Korea Republic of
| | - Y J Hong
- Chonnam National University Hospital, Division of Cardiology, Gwangju, Korea Republic of
| | - M H Jeong
- Chonnam National University Hospital, Division of Cardiology, Gwangju, Korea Republic of
| | - Y J Kim
- Yeungnam University Hospital, Division of Cardiology, Daegu, Korea Republic of
| | - S C Chae
- Kyungpook National University Hospital, Division of Cardiology, Daegu, Korea Republic of
| | - T J Hong
- Pusan National University Hospital, Division of Cardiology, Pusan, Korea Republic of
| | - I W Seong
- Chungnam National University Hospital, Division of Cardiology, Daejeon, Korea Republic of
| | - J K Chae
- Chonbuk National University Hospital, Division of Cardiology, Jeonju, Korea Republic of
| | - C J Kim
- Kyung Hee University Hospital at Gangdong, Division of Cardiology, Seoul, Korea Republic of
| | - M C Cho
- Chungbuk National University Hospital, Division of Cardiology, Cheongju, Korea Republic of
| | - S W Rha
- Korea University Guro Hospital, Division of Cardiology, Seoul, Korea Republic of
| | - J H Bae
- Konyang University hospital, Division of Cardiology, Daejeon, Korea Republic of
| | - K B Seung
- Seoul St. Mary's Hospital, Division of Cardiology, Seoul, Korea Republic of
| | - S J Park
- Asan Medical Center, Division of Cardiology, Seoul, Korea Republic of
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Sim DS, Jeong MH, Kim HS, Gwon HC, Seung KB, Rha SW, Chae SC, Kim CJ, Cha KS, Park JS, Yoon JH, Chae JK, Joo SJ, Choi DJ, Hur SH. P4610Utility of GRACE and ACUITY-HORIZONS risk scores to guide dual antiplatelet therapy in patients with acute myocardial infarction undergoing drug-eluting stenting. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p4610] [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)
- D S Sim
- Chonnam National University Hospital, Gwangju, Korea Republic of
| | - M H Jeong
- Chonnam National University Hospital, Gwangju, Korea Republic of
| | - H S Kim
- Seoul National University Hospital, Seoul, Korea Republic of
| | - H C Gwon
- Samsung Medical Center, Seoul, Korea Republic of
| | - K B Seung
- The Catholic University of Korea, Seoul, Korea Republic of
| | - S W Rha
- Korea University Guro Hospital, Seoul, Korea Republic of
| | - S C Chae
- Kyungpook National University Hospital, Daegu, Korea Republic of
| | - C J Kim
- Kyunghee University, Seoul, Korea Republic of
| | - K S Cha
- Pusan National University Hospital, Pusan, Korea Republic of
| | - J S Park
- Yeungnam University Hospital, Daegu, Korea Republic of
| | - J H Yoon
- Wonju Medical College, Wonju, Korea Republic of
| | - J K Chae
- Chonbuk National University Hospital, Jeonju, Korea Republic of
| | - S J Joo
- Jeju National University Hospital, Jeju, Korea Republic of
| | - D J Choi
- Seoul National University Bundang Hospital, Seongnam, Korea Republic of
| | - S H Hur
- Keimyung University Hospital Dongsan Medical Center, Daegu, Korea Republic of
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Kim J, Suh BK, Ko CW, Lee KH, Shin CH, Hwang JS, Kim HS, Chung WY, Kim CJ, Han HS, Kwon NY, Cho SY, Yoo HW, Jin DK. Recombinant growth hormone therapy for prepubertal children with idiopathic short stature in Korea: a phase III randomized trial. J Endocrinol Invest 2018; 41:475-483. [PMID: 29103133 PMCID: PMC5852196 DOI: 10.1007/s40618-017-0786-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Accepted: 10/25/2017] [Indexed: 11/24/2022]
Abstract
PURPOSE Several studies have evaluated the effects of growth hormone (GH) on auxological and biochemical parameters in children with non-GH-deficient, idiopathic short stature (ISS). This study evaluated the efficacy and safety of Growtropin®-II (recombinant human GH) in Korean patients with ISS. METHODS This was a 1-year, open-label, multicenter, phase III randomized trial of Growtropin®-II in Korean patients with ISS. In total, 70 prepubertal subjects (39 males, 31 females) between 4 and 12 years of age were included in the study. All patients were naive to GH treatment. RESULTS Annual height velocity was significantly higher in the treatment group (10.68 ± 1.95 cm/year) than the control group (5.72 ± 1.72, p < 0.001). Increases in height and weight standard deviation scores (SDSs) at 26 weeks were 0.63 ± 0.16 and 0.64 ± 0.46, respectively, for the treatment group, and 0.06 ± 0.15 and 0.06 ± 0.28, respectively, for the control group (p < 0.001). Serum insulin-like growth factor (IGF-1) and insulin-like growth factor binding protein-3 (IGFBP-3) increased significantly in the treatment group at week 26 compared to baseline. However, the SDS for body mass index (BMI) at 26 weeks did not change significantly in either group. Growtropin®-II was well tolerated and safe over 1 year of treatment. CONCLUSIONS One-year GH treatment for prepubertal children with ISS demonstrated increased annualized velocity, height and weight SDSs, and IGF-1 and IGFBP-3 levels, with a favorable safety profile. Further evaluations are needed to determine the optimal dose, final adult height, and long-term effects of ISS treatment.
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Affiliation(s)
- J Kim
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, Republic of Korea
| | - B-K Suh
- Department of Pediatrics, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Republic of Korea
| | - C W Ko
- Department of Pediatrics, Kyungpook National University Hospital, Daegu, Republic of Korea
| | - K-H Lee
- Department of Pediatrics, Korea University Anam Hospital, Seoul, Republic of Korea
| | - C H Shin
- Department of Pediatrics, Seoul National University Children's Hospital, Seoul, Republic of Korea
| | - J S Hwang
- Department of Pediatrics, Ajou University Hospital, Suwon, Republic of Korea
| | - H S Kim
- Department of Pediatrics, Severance Hospital, Onsei University Health System, Seoul, Republic of Korea
| | - W Y Chung
- Department of Pediatrics, Inje University Busan Paik Hospital, Busan, Republic of Korea
| | - C J Kim
- Department of Pediatrics, Chonnam National University Hospital, Gwangju, Republic of Korea
| | - H-S Han
- Department of Pediatrics, Chungbuk National University Hospital, Cheongju, Republic of Korea
| | - N Y Kwon
- Data Management and Clinical Statistics Team, Dong-A ST Co., LTD, Seoul, Republic of Korea
| | - S Y Cho
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, Republic of Korea.
| | - H-W Yoo
- Department of Pediatrics, Medical Genetics Clinic and Laboratory, Asan Medical Center Children's Hospital, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea.
| | - D-K Jin
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, Republic of Korea
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Chang HK, Chang DG, Myong JP, Kim JH, Lee SJ, Lee YS, Lee HN, Lee KH, Park DC, Kim CJ, Hur SY, Park JS, Park TC. Bone mineral density among Korean females aged 20-50 years: influence of age at menarche (The Korea National Health and Nutrition Examination Survey 2008-2011). Osteoporos Int 2017; 28:2129-2136. [PMID: 28293690 DOI: 10.1007/s00198-017-3997-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Accepted: 03/01/2017] [Indexed: 11/28/2022]
Abstract
UNLABELLED To evaluate a possible correlation between bone mineral density (BMD) and age at menarche, the present study used the BMD dataset of the Korea National Health and Nutrition Examination Survey IV-V (KNHANES IV-V). Age at menarche had a small but significant association with BMD of the lumbar spine in premenopausal Korean females, aged 20-50 years. INTRODUCTION To investigate any correlation between bone mineral density (BMD) and age at menarche in Korean females using data from the fourth and fifth Korea National Health and Nutrition Examination Survey (KNHANES IV-V; 2008-2011). METHODS In total, 37,753 individuals participated in health examination surveys between 2008 and 2011. A total of 5032 premenopausal females aged 20-50 years were eligible. Age, height, weight, and age at menarche were assessed. RESULTS Results from the univariate linear regression and analysis of covariance (ANCOVA) indicated that age (per 1 year), height (per 1 cm), weight (per 1 kg), exercise (per 1 day/week), familial osteoporosis history (yes), parity (n = 0 to ≥4), and menarche age distribution were associated with BMD of the total femur, femur neck, and lumbar spine. After stratifying the bone area and adjusting for age, parity, alcohol intake, smoking, exercise, and familial osteoporosis history, no effect was seen for the total femur or femur neck. Age at menarche 16~17 and ≥18 years groups were associated with BMD of the lumbar spine only. CONCLUSIONS Age at menarche had a small but significant association with BMD of the lumbar spine in premenopausal Korean females, aged 20-50 years. Females with late menarche may achieve lower peak bone mass at some skeletal sites, which may put them at greater risk for osteoporosis in later life.
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Affiliation(s)
- H K Chang
- Center for Uterine Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Republic of Korea
| | - D-G Chang
- Department of Orthopaedic Surgery, Sanggye Paik Hospital, College of Medicine, Inje University, Seoul, Republic of Korea
| | - J-P Myong
- Department of Occupational & Environmental Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul, 06591, Republic of Korea.
| | - J-H Kim
- Department of Orthopaedic Surgery, Sanggye Paik Hospital, College of Medicine, Inje University, Seoul, Republic of Korea
| | - S-J Lee
- Department of Obstetrics and Gynecology, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Y S Lee
- Department of Obstetrics and Gynecology, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - H-N Lee
- Department of Obstetrics and Gynecology, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - K H Lee
- Department of Obstetrics and Gynecology, Seoul St.Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - D C Park
- Department of Obstetrics and Gynecology, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - C J Kim
- Department of Obstetrics and Gynecology, St. Paul's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - S Y Hur
- Department of Obstetrics and Gynecology, Seoul St.Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - J S Park
- Department of Obstetrics and Gynecology, Seoul St.Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - T C Park
- Department of Obstetrics and Gynecology, Uijeongbu St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
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Kim CJ, Gaudry Q, Harbison ST. 0009 AUTOMATED TRACKING AND QUANTITATIVE GENETIC ANALYSIS OF REST AND ACTIVITY BEHAVIOR IN DROSOPHILA LARVAE. Sleep 2017. [DOI: 10.1093/sleepj/zsx050.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Jang H, Park EK, Han DS, Kim CJ, Lee YS. Bladder stone formation on permanent suture material ten years after laparoscopic high uterosacral ligament suspension. CLIN EXP OBSTET GYN 2017; 44:472-474. [PMID: 29949298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The present authors describe an uncommon case of iatrogenic bladder stone formation in a patient who underwent surgery for pelvic organ prolapse. A female patient who underwent high uterosacral ligament suspension ten years ago presented with pyuria and irritable bladder symptoms that did not respond to treatment. She had not experienced any specific urinary symptoms during the previous ten years. Patient evaluation revealed bladder stone formation on the non-absorbable suture material used during the previous operation. Cystoscopy during the previous operation did not find the suture material, and the suture knot that was tied extravesically during the operation was found inside the bladder. These strongly suggest delayed migration and rotation of the'suture knot after surgery rather than direct penetration of the bladder during operation. Delayed suture migration is a long-term complication that clinicians should consider in a patient who suffers from recurrent urinary symptoms after pelvic surgery around the bladder.
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Abstract
Herein, we report the self-assembly and multimodal shape transformation of dual-responsive DNA di- and triblock copolymers. Dual-responsive DNA diblock copolymer was synthesized by coupling a thermoresponsive polymer, poly(N-isopropylacrylamide (PNIPAM), and an oligonucleotide. DNA-b-PNIPAM possesses thermoresponsive properties of PNIPAM as well as molecular recognition properties of DNA. Thus, they undergo reversible temperature-triggered transition at lower critical solution temperature (LCST) between molecular DNA and polymer micelles with high density DNA corona. The hybridization of DNA-b-PNIPAM and DNA-modified nanoparticles generates functional nanoparticles showing unique temperature-dependent aggregation and disaggregation behaviors due to the dual-responsive nature of DNA-b-PNIPAM. DNA triblock copolymers of DNA-b-PNIPAM-b-PMA were synthesized by introducing a hydrophobic block, poly(methyl acrylate) (PMA), to DNA/PNIPAM block copolymers, which form spherical micelles at room temperature. They are capable of nanoscale shape transformation through the combination of thermal trigger and DNA binding. DNA-b-PNIPAM-b-PMA micelles undergo sphere-to-cylinder shape changes above LCST due to the conformational change of PNIPAM. The shape change is reversible, and fast cylinder-to-sphere transition occurs when the temperature is lowered below LCST. The low temperature spherical morphology can also be accessed while keeping the temperature above LCST by introducing complementary DNA strands with single stranded overhang regions. These results demonstrate the multidimensional shape changing capability of DNA-b-PNIPAM-b-PMA enabled by the dual-responsive property.
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Affiliation(s)
- Chan-Jin Kim
- Department of Chemistry and Nano Science, Ewha Womans University , 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 120-750, Korea
| | - Xiaole Hu
- Department of Chemistry and Nano Science, Ewha Womans University , 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 120-750, Korea
| | - So-Jung Park
- Department of Chemistry and Nano Science, Ewha Womans University , 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 120-750, Korea
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Lackeyram D, Young D, Kim CJ, Yang C, Archbold TL, Mine Y, Fan MZ. Interleukin-10 is differentially expressed in the small intestine and the colon experiencing chronic inflammation and ulcerative colitis induced by dextran sodium sulfate in young pigs. Physiol Res 2016; 66:147-162. [PMID: 27782738 DOI: 10.33549/physiolres.933259] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Intestinal inflammation induced with dextran sodium sulfate (DSS) is used to study acute or chronic ulcerative colitis in animal models. Decreased gut tissue anti-inflammatory cytokine IL-10 concentration and mRNA abundance are associated with the development of chronic bowel inflammation. Twelve piglets of 3 days old were fitted with an intragastric catheter and randomly allocated into control and DSS groups by administrating either sterile saline or 1.25 g of DSS/kg body weight (BW) in saline per day, respectively, for 10 days. Growth rate and food conversion efficiency were reduced (p<0.05) in the DSS piglets compared with the control group. Quantitative histopathological grading of inflammation in the jejunum and colon collectively showed that the DSS treatment resulted in 12 fold greater (p<0.05) inflammation severity scoring in the colon than in the jejunum, indicative of chronic ulcerative colitis in the colon. Upper gut permeability endpoint was 27.4 fold higher (p<0.05) in the DSS group compared with the control group. The DSS group had higher concentrations and mRNA abundances (p<0.05) of TNF-alpha and IL-6 in the jejunal and colonic tissues compared with the control group. Colonic concentration and mRNA abundance of IL-10 were reduced (p<0.05), however, jejunal IL-10 mRNA abundance was increased (p<0.05) in the DSS group compared with the control group. In conclusion, administration of DSS at 1.25 g/kg BW for 10 days respectively induced acute inflammation in the jejunum and chronic inflammation and ulcerative colitis in the colon with substantially decreased colonic concentration and mRNA abundance of IL-10 in the young pigs, mimicking the IL-10 expression pattern in humans Associated with chronic bowel inflammation.
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Affiliation(s)
- D Lackeyram
- Department of Animal Biosciences, University of Guelph, Guelph, Ontario, Canada.
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Song KH, Jung SI, Lee S, Park S, Kiem SM, Lee SH, Kwak YG, Kim YK, Jang HC, Kim YS, Kim HI, Kim CJ, Park KH, Kim NJ, Oh MD, Kim HB. Characteristics of cefazolin inoculum effect-positive methicillin-susceptible staphylococcus aureus infection in a multicentre bacteraemia cohort. Eur J Clin Microbiol Infect Dis 2016; 36:285-294. [PMID: 27714592 DOI: 10.1007/s10096-016-2799-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 09/19/2016] [Indexed: 11/25/2022]
Abstract
Cefazolin treatment failure has been observed in high-inoculum infections caused by methicillin-susceptible Staphylococcus aureus (MSSA) with a cefazolin inoculum effect (CIE). However, data on the characteristics and risk factors for the acquisition of CIE-positive MSSA infection are scarce. CIE positivity was measured as an MIC ≥ 16 μg/ml with a high inoculum (∼5 × 107 CFU/ml). The blaZ gene type was assessed through sequence analysis. The clinical characteristics and risk factors for the acquisition of CIE-positive MSSA infection were assessed. The association between the antimicrobial susceptibility profile and CIE positivity was evaluated. A total of 303 MSSA bacteraemia cases and their corresponding isolates were collected from ten hospitals: 61 (20.1 %) isolates showed a positive CIE; 254 (83.8 %) were positive for the blaZ gene. No significant association was found between CIE positivity and the site of infection. Metastatic cancer (aOR 2.86, 95 % CI, 1.10-7.48) and recent (≤1 month) close contact with a chronically ill patient (aOR 4.69, 95 % CI, 1.76-12.50) were identified as significant risk factors for CIE-positive MSSA infection through multivariate analyses. Resistances to clindamycin (OR 3.55, 95 % CI, 1.62-7.80) and erythromycin (OR 5.00, 95 % CI, 2.50-9.99) were associated with CIE positivity, presenting high specificity (92.9 %) and a negative predictive value (82.3 %). CIE-positive MSSA constituted approximately one-fifth of MSSA bacteraemia cases. Although CIE positivity was not clinically discernible, CIE positivity was associated with clindamycin or erythromycin susceptibility. Therefore, our findings suggest that cefazolin can be used in the treatment of high-inoculum MSSA infection if the isolates are susceptible to clindamycin or erythromycin.
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Affiliation(s)
- K-H Song
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - S-I Jung
- Department of Infectious Diseases, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - S Lee
- Department of Internal Medicine, Pusan National University School of Medicine and Medical Research Institute, Pusan National University Hospital, Busan, Republic of Korea.
| | - S Park
- Department of Internal Medicine, Pusan National University School of Medicine and Medical Research Institute, Pusan National University Hospital, Busan, Republic of Korea
| | - S M Kiem
- Department of Internal Medicine, Inje University College of Medicine, Busan, Republic of Korea
| | - S H Lee
- Department of Internal Medicine, Pusan National University School of Medicine and Medical Research Institute, Pusan National University Hospital, Busan, Republic of Korea
| | - Y G Kwak
- Department of Internal Medicine, Inje University Ilsan Paik Hospital, Goyang, Republic of Korea
| | - Y K Kim
- Department of Internal Medicine, Yonsei University Medical School, Wonju, Republic of Korea
| | - H-C Jang
- Department of Internal Medicine, Chonnam National University Hwasun Hospital, Hwasun, Jeollanam-do, Republic of Korea
| | - Y-S Kim
- Division of Infectious Diseases, Chungnam National University Hospital, Chungnam National University School of Medicine, Daejeon, Republic of Korea
| | - H-I Kim
- Department of Internal Medicine, Daegu Fatima Hospital, Daegu, Republic of Korea
| | - C J Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea.,Ewha Woman's University Medical Center, Seoul, Republic of Korea
| | - K-H Park
- Department of Infectious Diseases, Chonnam National University Medical School, Gwangju, Republic of Korea
| | - N J Kim
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| | - M-D Oh
- Department of Internal Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| | - H B Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
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Than NG, Romero R, Xu Y, Erez O, Xu Z, Bhatti G, Leavitt R, Chung TH, El-Azzamy H, LaJeunesse C, Wang B, Balogh A, Szalai G, Land S, Dong Z, Hassan SS, Chaiworapongsa T, Krispin M, Kim CJ, Tarca AL, Papp Z, Bohn H. Evolutionary origins of the placental expression of chromosome 19 cluster galectins and their complex dysregulation in preeclampsia. Placenta 2014; 35:855-65. [PMID: 25266889 PMCID: PMC4203431 DOI: 10.1016/j.placenta.2014.07.015] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Revised: 07/04/2014] [Accepted: 07/28/2014] [Indexed: 12/13/2022]
Abstract
INTRODUCTION The dysregulation of maternal-fetal immune tolerance is one of the proposed mechanisms leading to preeclampsia. Galectins are key regulator proteins of the immune response in vertebrates and maternal-fetal immune tolerance in eutherian mammals. Previously we found that three genes in a Chr19 cluster encoding for human placental galectin-13 (PP13), galectin-14 and galectin-16 emerged during primate evolution and may confer immune tolerance to the semi-allogeneic fetus. MATERIALS AND METHODS This study involved various methodologies for gene and protein expression profiling, genomic DNA methylation analyses, functional assays on differentiating trophoblasts including gene silencing, luciferase reporter and methylation assays. These methods were applied on placental specimens, umbilical cord blood cells, primary trophoblasts and BeWo cells. Genomic DNA sequences were analyzed for transposable elements, transcription factor binding sites and evolutionary conservation. RESULTS AND DISCUSSION The villous trophoblastic expression of Chr19 cluster galectin genes is developmentally regulated by DNA methylation and induced by key transcription factors of villous placental development during trophoblast fusion and differentiation. This latter mechanism arose via the co-option of binding sites for these transcription factors through promoter evolution and the insertion of an anthropoid-specific L1PREC2 transposable element into the 5' untranslated region of an ancestral gene followed by gene duplication events. Among placental Chr19 cluster galectin genes, the expression of LGALS13 and LGALS14 is down-regulated in preterm severe preeclampsia associated with SGA. We reveal that this phenomenon is partly originated from the dysregulated expression of key transcription factors controlling trophoblastic functions and galectin gene expression. In addition, the differential DNA methylation of these genes was also observed in preterm preeclampsia irrespective of SGA. CONCLUSIONS These findings reveal the evolutionary origins of the placental expression of Chr19 cluster galectins. The complex dysregulation of these genes in preeclampsia may alter immune tolerance mechanisms at the maternal-fetal interface.
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Affiliation(s)
- N G Than
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services, Bethesda, MD, and Detroit, MI, USA; Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, MI, USA; Maternity Private Department, Kutvolgyi Clinical Block, Semmelweis University, Budapest, Hungary; Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary.
| | - R Romero
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services, Bethesda, MD, and Detroit, MI, USA.
| | - Y Xu
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services, Bethesda, MD, and Detroit, MI, USA
| | - O Erez
- Department of Obstetrics and Gynecology, Ben-Gurion University, Beer-Sheva, Israel
| | - Z Xu
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services, Bethesda, MD, and Detroit, MI, USA
| | - G Bhatti
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services, Bethesda, MD, and Detroit, MI, USA
| | - R Leavitt
- Zymo Research Corporation, Irvine, CA, USA
| | - T H Chung
- Zymo Research Corporation, Irvine, CA, USA
| | - H El-Azzamy
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services, Bethesda, MD, and Detroit, MI, USA
| | - C LaJeunesse
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services, Bethesda, MD, and Detroit, MI, USA
| | - B Wang
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services, Bethesda, MD, and Detroit, MI, USA
| | - A Balogh
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services, Bethesda, MD, and Detroit, MI, USA; Department of Immunology, Eotvos Lorand University, Budapest, Hungary
| | - G Szalai
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services, Bethesda, MD, and Detroit, MI, USA
| | - S Land
- Center for Molecular Medicine and Genetics, Wayne State University, Detroit, MI, USA
| | - Z Dong
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services, Bethesda, MD, and Detroit, MI, USA
| | - S S Hassan
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services, Bethesda, MD, and Detroit, MI, USA; Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, MI, USA
| | - T Chaiworapongsa
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services, Bethesda, MD, and Detroit, MI, USA; Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, MI, USA
| | - M Krispin
- Zymo Research Corporation, Irvine, CA, USA
| | - C J Kim
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services, Bethesda, MD, and Detroit, MI, USA; Department of Pathology, Wayne State University School of Medicine, Detroit, MI, USA
| | - A L Tarca
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U.S. Department of Health and Human Services, Bethesda, MD, and Detroit, MI, USA; Center for Molecular Medicine and Genetics, Wayne State University, Detroit, MI, USA
| | - Z Papp
- Maternity Private Department, Kutvolgyi Clinical Block, Semmelweis University, Budapest, Hungary
| | - H Bohn
- Behringwerke AG, Marburg/Lahn, Germany
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Kim CJ, Connell H, McGeorge AD, Hu R. Prevalence of preoperative anaemia in patients having first-time cardiac surgery and its impact on clinical outcome. A retrospective observational study. Perfusion 2014; 30:277-83. [DOI: 10.1177/0267659114542457] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The prevalence of anaemia is increasing globally. It has a close association with perioperative blood transfusion which, in turn, results in an increased risk of postoperative complications. Undesirable effects are not only limited to short-term, but also have long-term implications. Despite this, many patients undergo cardiac surgery with undiagnosed and untreated anaemia. We designed a retrospective, observational study to estimate the prevalence of anaemia in patients having cardiac surgery in Auckland District Health Board, blood transfusion rates and associated clinical outcome. Two hundred of seven hundred and twelve (28.1%) patients were anaemic. Red blood cell (RBC) transfusion rates were significantly higher in the anaemic group compared to the non-anaemic group (160 (80%) vs. 192 (38%), p-value <0.0001, RR (CI 95%) 2.133 (1.870-2.433)). Transfusion rates for fresh frozen plasma (FFP), cryoprecipitate and platelets were also higher in the anaemic group. Anaemia was significantly associated with the development of new infection (14 (7%) vs. 15 (2.9%), p-value 0.0193, RR (CI 95%) 2.389 (1.175-4.859)), prolonged ventilation time (47.01 hours vs. 23.59 hours, p-value 0.0076) and prolonged intensive care unit (ICU) stay (80.23 hours vs. 50.27, p-value 0.0011). Preoperative anaemia is highly prevalent and showed a clear link with significantly higher transfusion rates and postoperative morbidity. It is vital that a preoperative management plan for the correction of anaemia should be sought to improve patient safety and outcome.
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Affiliation(s)
- CJ Kim
- Department of Anaesthesia. Auckland District Health Board (ADHB), Auckland, New Zealand
| | - H Connell
- Department of Anaesthesia and Cardiothoracic and Vascular Intensive Care Unit (CVICU). ADHB, Auckland, New Zealand
| | - AD McGeorge
- Department of Anaesthesia and Cardiothoracic and Vascular Intensive Care Unit (CVICU). ADHB, Auckland, New Zealand
| | - R Hu
- ADHB Research Office. Auckland District Health Board, Auckland, New Zealand
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Lee H, Kim ES, Choi C, Seo H, Shin M, Bok JH, Cho JE, Kim CJ, Shin JW, Kim TS, Song KH, Park KU, Kim BI, Kim HB. Outbreak among healthy newborns due to a new variant of USA300-related meticillin-resistant Staphylococcus aureus. J Hosp Infect 2014; 87:145-51. [PMID: 24856113 DOI: 10.1016/j.jhin.2014.04.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Accepted: 04/09/2014] [Indexed: 10/25/2022]
Abstract
BACKGROUND The prevalence of community-associated meticillin-resistant Staphylococcus aureus (CA-MRSA) is increasing throughout the world and is an important cause of skin and soft tissue infection (SSTI) in children and neonates. AIM To describe the successful control of an outbreak caused by a new strain of CA-MRSA in a newborn nursery. METHODS The investigation of the outbreak in July 2012 is reported with the control measures taken. Molecular typing of the MRSA isolates was performed. FINDINGS An outbreak of SSTI caused by CA-MRSA occurred in a newborn nursery. Six neonates were infected in a one-month period [infection rate: 8.5% (6/71)]. A new variant of CA-MRSA was responsible, which was characterized as USA300-related, Panton-Valentine Leucocidin (PVL) positive, arginine catabolic mobile element (ACME) negative, sequence type 8 (ST8), staphylococcal cassette chromosome mec (SCCmec) type IVa, agr type I and spa type t008. The outbreak among term neonates followed a rapid transmission pattern and was successfully controlled by implementing various outbreak control measures, including universal chlorhexidine bathing. CONCLUSION This is the first report of a hospital outbreak caused by a USA300-related CA-MRSA clone in Korea. Early recognition and reinforcement of infection control measures are important in decreasing transmission of CA-MRSA in a hospital setting.
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Affiliation(s)
- H Lee
- Department of Paediatrics, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - E S Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea.
| | - C Choi
- Department of Paediatrics, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - H Seo
- Infection Control Office, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - M Shin
- Infection Control Office, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - J H Bok
- Department of Nursing, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - J E Cho
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - C J Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - J W Shin
- Department of Dermatology, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - T S Kim
- Department of Laboratory Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - K H Song
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - K U Park
- Department of Laboratory Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - B I Kim
- Department of Paediatrics, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - H B Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea; Infection Control Office, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
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Kim CJ, Lee DI, Kim C, Lee K, Lee CH, Ahn IS. Gold Nanoparticles-Based Colorimetric Assay for Cathepsin B Activity and the Efficiency of Its Inhibitors. Anal Chem 2014; 86:3825-33. [DOI: 10.1021/ac4039064] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Chan-Jin Kim
- Department
of Chemical and Biomolecular Engineering, Yonsei University, Seoul 120-749, South Korea
| | - Dong-Ik Lee
- Dityrosine Innovation Chemical (D. I. Chemical), Seoul 120-749, South Korea
| | - Cheonghee Kim
- Department
of Chemical and Biomolecular Engineering, Yonsei University, Seoul 120-749, South Korea
| | - Kangtaek Lee
- Department
of Chemical and Biomolecular Engineering, Yonsei University, Seoul 120-749, South Korea
| | - Chang-Ha Lee
- Department
of Chemical and Biomolecular Engineering, Yonsei University, Seoul 120-749, South Korea
| | - Ik-Sung Ahn
- Department
of Chemical and Biomolecular Engineering, Yonsei University, Seoul 120-749, South Korea
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40
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Kim HW, Hwang KE, Song DH, Kim YJ, Lim YB, Choi JH, Choi YS, Kim HY, Kim CJ. Effects of soy sauce on physicochemical and textural properties of tumbled chicken breast. Poult Sci 2014; 93:680-6. [PMID: 24604862 DOI: 10.3382/ps.2012-02930] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The objective of this study was to evaluate the effects of soy sauce on the physicochemical and textural properties of tumbled chicken breasts. Chicken breasts marinated with distilled water (Con), 4% NaCl solution, 4% NaCl and lactic acid solution (pH 4.9), and soy sauce solution (4% salt concentration and pH 4.9) were vacuum tumbled at 3°C for 60 min. The chicken breast marinated with soy sauce solution showed lower lightness and higher redness and yellowness due to the color of the soy sauce. The acidic marinades led to a decrease in pH value of tumbled chicken breast. The acidic marinades increased collagen solubility of sample compared with 4% NaCl solution, resulting in decreased shear force. Water-holding capacity, marination and cooking yields, and solubility of myofibrillar proteins were mainly affected by the presence of salt in the marinade, rather than by pH alternation. Our results suggested that soy sauce marination can improve the tenderness of tumbled chicken breast.
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Affiliation(s)
- H W Kim
- Department of Food Science and Biotechnology of Animal Resources, Konkuk University, Seoul 143-701, Republic of Korea
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Lee HB, Kim CJ, Mun HY. First Report of Powdery Mildew on Spanish Needles (Bidens bipinnata) Caused by Podosphaera xanthii in Korea. Plant Dis 2013; 97:1385. [PMID: 30722155 DOI: 10.1094/pdis-10-12-0966-pdn] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Spanish needles (Bidens bipinnata L.) is an annual herb that belongs to a genus of flowering plants in family Asteraceae native to United States, and tropical regions around world. The plant produces important flavonoid compounds quercitin and hyperoside that function as anti-allergens, anti-inflammatories, anti-microbials, and anti-cancer agents. Between July and October 2011 and 2012, white superficial mycelia were observed initially on leaf and stem portions, but later progressed to the flower head. Surveys showed that the disease was widespread in Gwangju and most areas of South Korea. Abundant, necrotic, dark brown spots showing chasmothecia were frequently observed in October and were abundant on the adaxial surface of leaves. Chasmothecia were blackish brown to yellow without typical appendages. They ranged from 51.2 to 71.1 (mean 66.8) μm in diameter. Conidia were formed singly and the primary conidia were ellipsoid, rounded at the apex, truncated base, and ranged from 25.4 to 33.2 (mean 27.3) μm long × 10.2 to 12.2 (mean 11.3) μm wide. Conidiophores were erect, 60.1 to 101.3 (mean 98.3) μm long × 6.2 to 9.2 (mean 7.3) μm wide. From extracted genomic DNA, the internal transcribed spacer (ITS) region inclusive of 5.8S and 28S rDNA was amplified with ITS1F (5'-TCCGTAGGTGAACCTGCGG-3') and LR5F (5'-GCTATCCTGAGGGAAAC-3'), and LROR (5'-ACCCGCTGAACTTAAGC-3') and LR5F primer sets, respectively. rDNA ITS (GenBank Accession No. JX512555) and 28S (JX512556) homologies of the fungus (EML-BBPW1) represented 99.6% (532/534) and 100% (661/661) identity values with Podosphaera xanthii (syn. P. fusca) AB040349 and P. xanthii (syn. P. fusca) AB462798, respectively. The rDNA sequence analysis revealed that the causal fungus matched P. xanthii (syn. P. fusca), forming a xanthii/fusca group (3,4). A pathogenicity test was performed on three plants in a greenhouse. The treated leaves were sealed in vinyl pack in humid condition for 2 days. Seven days after inoculation, similar symptoms were observed on the inoculated Spanish needles plant leaves. No symptoms were observed on control plants treated with distilled water. Koch's postulates were fulfilled by re-observing the fungal pathogen on the inoculated leaves. Podosphaera (syn. Sphaerotheca) xanthii (or fusca) has been known as an ubiquitous species with a broad host range. So far, five records regarding P. xanthii (=P. fusca) have been found in plants of genus Bidens. P. xanthii has been reported to occur on B. cernua in Belarus and Switzerland. In addition, the powdery mildew species was reported to occur on B. frondosa and B. tripartita in Korea, Russia, and Switzerland (2). To our knowledge, this is the first report of powdery mildew caused by P. xanthii on Spanish needles (B. bipinnata) in Korea. References: (1) U. Braun et al. Schlechtendalia 10:91, 2003. (2) D. F. Farr and A. Y. Rossman. Fungal Databases, Systematic Mycology and Microbiology Laboratory, ARS, USDA. Retrieved from http://nt.ars-grin.gov/fungaldatabases/ , 2012. (3) H. B. Lee. J. Microbiol. 51:1075, 2012. (4) S. Takamatsu, et al. Persoonia 24:38, 2010.
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Affiliation(s)
- H B Lee
- Division of Applied Bioscience and Biotechnology, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 500-757, Republic of Korea. This work was supported by a grant from NIBR, and funded in part by IPET (312032-04), Republic of Korea
| | - C J Kim
- Division of Applied Bioscience and Biotechnology, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 500-757, Republic of Korea. This work was supported by a grant from NIBR, and funded in part by IPET (312032-04), Republic of Korea
| | - H Y Mun
- Division of Applied Bioscience and Biotechnology, College of Agriculture and Life Sciences, Chonnam National University, Gwangju 500-757, Republic of Korea. This work was supported by a grant from NIBR, and funded in part by IPET (312032-04), Republic of Korea
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Song MJ, Lee CW, Kim JH, Lee SJ, Kim CJ, Hur SY, Park TC, Kim TG, Park JS. Association of KIR genes and HLA-C alleles with HPV-related uterine cervical disease in Korean women. ACTA ACUST UNITED AC 2013; 81:164-70. [PMID: 23398510 DOI: 10.1111/tan.12068] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2011] [Revised: 01/04/2013] [Accepted: 01/13/2013] [Indexed: 11/29/2022]
Abstract
This study investigated whether killer-cell immunoglobulin-like receptor (KIR) genes and human leukocyte antigen (HLA)-C alleles, receptors and ligands of natural killer cells are associated with the development of human papillomavirus (HPV)-related cervical disease in Korean women. Blood samples from 132 women with HPV-related cervical disease and 159 women without HPV infection were collected for genotyping of KIR genes and HLA-C alleles. Although no relationship was found between KIR genes and HPV-related cervical disease, a significant relationship was found between HLA-C alleles as ligands of KIR and HPV-related cervical disease. Women with HPV-related cervical disease were found to be significantly more likely to carry HLA-C*0303, particularly those with HPV 16 or 18 infection, and less likely to carry HLA-C*01 compared to women without HPV infection. HLA-C*0303 was found to confer susceptibility to HPV-related cervical disease, whereas HLA-C*01 was found to confer a protective effect against HPV-related cervical disease.
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Affiliation(s)
- M J Song
- Department of Obstetrics and Gynecology, College of Medicine, The Catholic University of Korea, Seocho-gu, Seoul, South Korea
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Kim MT, Rhee KY, Lee BH, Kim CJ. Effect of carbon nanotube addition on the wear behavior of basalt/epoxy woven composites. J Nanosci Nanotechnol 2013; 13:5631-5635. [PMID: 23882807 DOI: 10.1166/jnn.2013.7037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The effect of acid-treated carbon nanotube (CNT) addition on the wear and dynamic mechanical thermal properties of basalt/epoxy woven composites was investigated in this study. Basalt/CNT/epoxy composites were fabricated by impregnating woven basalt fibers into epoxy resin mixed with 1 wt% CNTs which were acid-treated. Wear and DMA (dynamic mechanical analyzer) tests were performed on basalt/epoxy composites and basalt/CNT/epoxy composites. The results showed that the addition of the acid-treated CNTs improved the wear properties of basalt/epoxy woven composites. Specifically, the friction coefficient of the basalt/epoxy composite was stabilized in the range of 0.5-0.6 while it fell in the range of 0.3-0.4 for basalt/CNT/epoxy composites. The wear volume loss of the basalt/CNT/epoxy composites was approximately 68% lower than that of the basalt/epoxy composites. The results also showed that the glass transition temperature of basalt/CNT/epoxy composites was higher than that of basalt/epoxy composites. The improvement of wear properties of basalt/epoxy composites by the addition of acid-treated CNTs was caused by the homogeneous load transfer between basalt fibers and epoxy matrix due to the reinforcement of CNTs.
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Affiliation(s)
- M T Kim
- Department of R&D, Gumi Electronics and Information Technology Research Institute, Gumi 730-853, Korea
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A Lee K, Kim YW, Shim JY, Won HS, Lee PR, Kim A, Kim CJ. Distinct patterns of C4d immunoreactivity in placentas with villitis of unknown etiology, cytomegaloviral placentitis, and infarct. Placenta 2013; 34:432-5. [PMID: 23481222 DOI: 10.1016/j.placenta.2013.02.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Revised: 02/05/2013] [Accepted: 02/11/2013] [Indexed: 01/08/2023]
Abstract
C4d deposition is considered to be evidence of antibody-mediated rejection. This study was conducted to compare C4d immunoreactivity between villitis of unknown etiology (VUE) and cytomegaloviral placentitis. C4d immunohistochemistry was performed in cases with VUE (n = 16) and cytomegaloviral placentitis (n = 5). Distinct, linear C4d immunoreactivity along the syncytiotrophoblast was found in all VUE cases. In cytomegaloviral placentitis, the intensity of C4d immunoreactivity along the syncytiotrophoblast was not prominent, but cytoplasmic C4d immunoreactivity of villous cytotrophoblasts was frequently observed. Further screening of the cases with placental infarcts (n = 5) demonstrated prominent C4d immunoreactivity in the chorionic villi adjacent to the infarct. We report the characteristic co-localization of VUE and C4d immunoreactivity. The overall findings in this study strongly suggest that the complement activation is a common mechanism of diverse placental injuries associated with rejection, infection, and ischemia.
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Affiliation(s)
- K A Lee
- Department of Obstetrics and Gynecology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea
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Hong JS, Romero R, Kusanovic JP, Kim JS, Lee J, Jin M, El Azzamy H, Lee DC, Topping V, Ahn S, Jacques S, Qureshi F, Chaiworapongsa T, Hassan SS, Korzeniewski SJ, Than NG, Kim CJ. "Trophoblast islands of the chorionic connective tissue" (TICCT): a novel placental histologic feature. Placenta 2013; 34:360-8. [PMID: 23453248 DOI: 10.1016/j.placenta.2013.01.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2013] [Accepted: 01/25/2013] [Indexed: 12/25/2022]
Abstract
INTRODUCTION We found isolated or clustered trophoblasts in the chorionic connective tissue of the extraplacental membranes, and defined this novel histologic feature as the "trophoblast islands of the chorionic connective tissue" (TICCT). This study was conducted to determine the clinical significance of TICCT. METHODS Immunohistochemistry for cytokeratin-7 was performed on the chorioamniotic membranes (N = 2155) obtained from singleton pregnancies of 1199 uncomplicated term and 956 preterm deliveries. The study groups comprised 1236 African-American and 919 Hispanic women. Gestational age ranged from 24(+0) weeks to 41(+6) weeks. Multiple logistic regression analysis was performed to investigate the magnitude of association between patient characteristics and the presence of TICCT. RESULTS The likelihood of TICCT was significantly associated with advancing gestational age both in term (OR: 1.29, 95% CI: 1.16-1.45, p < 0.001) and preterm deliveries (OR: 1.19, 95% CI: 1.07-1.32, p = 0.001) . Hispanic women were less likely than African-American women to have TICCT across gestation in term (OR: 0.23, 95% CI: 0.18-0.31, p < 0.001) and preterm pregnancies (OR: 0.41, 95% CI: 0.29-0.58, p < 0.001). Women with a female fetus were significantly more likely to have TICCT than women with a male fetus, in both term (OR: 1.64, 95% CI: 1.28-2.11, p < 0.001) and preterm gestations (OR: 2.04, 95% CI: 1.46-2.85, p < 0.001). TICCT was 40% less frequent in the presence of chronic placental inflammation [term (OR: 0.60, 95% CI: 0.45-0.81, p = 0.001) and preterm gestations (OR: 0.58, 95% CI: 0.40-0.84, p = 0.003)] and in parous women at term (OR: 0.60, 95% CI: 0.44-0.81, p = 0.001). CONCLUSIONS Our findings suggest that the duration of pregnancy, fetal sex, and parity may influence the behavior of extravillous trophoblast and placental mesenchymal cells.
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Affiliation(s)
- J-S Hong
- Perinatology Research Branch, NICHD/NIH/DHHS, Bethesda, MD, USA
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Kim HW, Lee SH, Choi JH, Choi YS, Kim HY, Hwang KE, Park JH, Song DH, Kim CJ. Effects of rigor state, thawing temperature, and processing on the physicochemical properties of frozen duck breast muscle. Poult Sci 2012; 91:2662-7. [PMID: 22991555 DOI: 10.3382/ps.2012-02154] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The objectives of this study were to evaluate effects of rigor state, thawing temperature, and processing on the physicochemical properties of intact frozen duck breast muscle and homogenates prepared with the frozen-thawed muscles. Prerigor breast muscle was frozen at -25°C and thawed at 4 and 15°C, and the physicochemical properties of duck breast frozen prerigor compared with those in frozen postrigor and 4°C chilled postrigor muscles. The homogenates prepared with duck breast frozen prerigor showed similar physicochemical properties as the frozen-thawed postrigor muscle homogenate. The thawing temperature did not affect the physicochemical properties of homogenates prepared with duck breast muscle frozen prerigor. Also, no significant differences (P > 0.05) in the ultimate pH value and color parameters were observed among the frozen-thawed treatments despite the differences in rigor state and thawing temperature. However, a higher thawing temperature of the intact frozen prerigor muscle resulted in an increase in thawing loss and shear force due to excessive muscle shortening. In this study, the intact duck breast that has undergone thaw-rigor showed main problems associated with thaw-rigor, such as higher thawing loss and shear force, regardless of thawing temperature. However, the processing (grinding and salting) decreased the difference in physicochemical properties due to rigor state before freezing and thawing temperature. Therefore, the frozen-thawed duck breast muscle used to manufacture ground-type meat product may be frozen before rigor onset.
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Affiliation(s)
- H W Kim
- Department of Food Science and Biotechnology of Animal Resources, Konkuk University, Seoul, Republic of Korea
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Kim CJ, Nazli A, Rojas OL, Chege D, Alidina Z, Huibner S, Mujib S, Benko E, Kovacs C, Shin LYY, Grin A, Kandel G, Loutfy M, Ostrowski M, Gommerman JL, Kaushic C, Kaul R. A role for mucosal IL-22 production and Th22 cells in HIV-associated mucosal immunopathogenesis. Mucosal Immunol 2012; 5:670-80. [PMID: 22854709 DOI: 10.1038/mi.2012.72] [Citation(s) in RCA: 142] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Interleukin-22 (IL-22) is a cytokine with epithelial reparative and regenerative properties that is produced by Th22 cells and by other immune cell subsets. Therefore, we explored the hypothesis that disruption of the gut barrier during HIV infection involves dysregulation of these cells in the gastrointestinal mucosa. Sigmoid IL-22-producing T cell and Th22 cells were dramatically depleted during chronic HIV infection, epithelial integrity was compromised, and microbial translocation was increased. These alterations were reversed after long-term antiretroviral therapy. While all mucosal IL-22-producing T-cell subsets were also depleted very early during HIV infection, at these early stages IL-22 production by non-T-cell populations (including NKp44+ cells) was increased and gut epithelial integrity was maintained. Circulating Th22 cells expressed a higher level of the HIV co-receptor/binding molecules CCR5 and α4β7 than CD4+ T-cell subsets in HIV-uninfected participants, but this was not the case after HIV infection. Finally, recombinant IL-22 was protective against HIV and tumor necrosis factor-α-induced gut epithelial damage in a validated in vitro gut epithelial system. We conclude that reduced IL-22 production and Th22 depletion in the gut mucosa are important factors in HIV mucosal immunopathogenesis.
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MESH Headings
- Anti-HIV Agents/pharmacology
- Anti-HIV Agents/therapeutic use
- Cell Lineage
- Colon, Sigmoid/immunology
- Colon, Sigmoid/pathology
- Colon, Sigmoid/virology
- HIV/physiology
- HIV Infections/drug therapy
- HIV Infections/immunology
- HIV Infections/pathology
- HIV Infections/virology
- Humans
- Immunity, Mucosal
- Interleukins/deficiency
- Interleukins/immunology
- Interleukins/pharmacology
- Intestinal Mucosa/drug effects
- Intestinal Mucosa/immunology
- Intestinal Mucosa/pathology
- Intestinal Mucosa/virology
- Killer Cells, Natural/immunology
- Killer Cells, Natural/pathology
- Killer Cells, Natural/virology
- Lymphocyte Count
- Lymphocyte Depletion
- Receptors, CCR5/immunology
- Recombinant Proteins/immunology
- Recombinant Proteins/pharmacology
- T-Lymphocytes, Helper-Inducer/immunology
- T-Lymphocytes, Helper-Inducer/pathology
- T-Lymphocytes, Helper-Inducer/virology
- Time Factors
- Tumor Necrosis Factor-alpha/immunology
- Tumor Necrosis Factor-alpha/pharmacology
- Interleukin-22
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Affiliation(s)
- C J Kim
- Department of Medicine, University of Toronto, Ontario, Canada.
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48
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Kim CJ, Lee ES. Effects of quality grade on the chemical, physical and sensory characteristics of Hanwoo (Korean native cattle) beef. Meat Sci 2012; 63:397-405. [PMID: 22062394 DOI: 10.1016/s0309-1740(02)00099-2] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2001] [Revised: 04/18/2002] [Accepted: 04/18/2002] [Indexed: 11/15/2022]
Abstract
The effects of quality grade (which reflects relative marbling) on the chemical, physical and sensory properties was investigated using Korean native cattle (Hanwoo) beef. Thirty-six Hanwoo cows were slaughtered and the carcasses were graded at 24h postmortem according to the Korean carcass grading system. The quality grade 1 (high quality), grade 2 and grade 3 (low quality) were based on the marbling score of longissimus dorsi (LD) muscles. The effects of quality grade on the meat quality parameters of beef LD muscle were assessed during aging. Loin-eye area, fat thickness and yield grade were all similar for the three quality groups. Mean lean color, fat color and maturity scores did not differ among quality grade groups (P>0.05). pH, Sarcomere length, WHC, collagen content, cooking loss, shear force and MFI were not affected by quality grade groups. Drip loss for grade 1 group was significantly lower than that for grade 3 groups (P<0.05). At initial tenderness evaluation of steaks, no differences among the three grades were observed; however, with additional days of storage, grade 1 steaks had higher tenderness score than grade 3 steaks (P<0.05). Increased postmortem aging time improved tenderness attributes regardless of quality groups. No significant differences were found among the quality grade groups for flavor (P>0.05). The grade 1 group had the highest juiciness score, and grade 3 groups had the lowest score (P<0.05), but postmortem aging did not influence flavor and juiciness. The quality grades were more strongly related to juiciness than tenderness or flavor.
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Affiliation(s)
- C J Kim
- Department of Animal Products Science, Konkuk University, Seoul, South Korea
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49
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Shin JW, Jung SW, Park BR, Kim CJ, Eum JB, Kim BG, Jeong ID, Bang SJ, Lee SH, Kim SR, Park NH. Prediction of response to entecavir therapy in patients with HBeAg-positive chronic hepatitis B based on on-treatment HBsAg, HBeAg and HBV DNA levels. J Viral Hepat 2012. [PMID: 22967104 DOI: 10.1111/j.1365-2893.2012.01599] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Quantitative hepatitis B surface antigen (HBsAg) and hepatitis B e antigen (HBeAg) assays are emerging as effective tools of on-treatment predictors of response to antiviral agents, in addition to monitoring serum HBV DNA levels. However, the dynamic relationship between quantitative HBsAg, as well as HBeAg and HBV DNA, and the predictability of subsequent clinical outcomes during entecavir (ETV) therapy remain unclear. Eighty-two patients with HBeAg-positive chronic hepatitis B (CHB) received ETV therapy for ≥3 years. Virologic response (VR) after 3 years of ETV therapy was achieved in 73 (89.0%) patients. Among baseline and on-treatment factors, on-treatment HBV DNA levels performed better with respect to the prediction of response than HBsAg and HBeAg levels. Especially, the performance of absolute values of HBV DNA with respect to response was superior to HBV DNA decline from the baseline. The best predictive value was an absolute HBV DNA level of 2.3 log(10) IU/mL at month 6 (areas under the curve [AUROC], 0.977; 95% CI, 0.940-1.000; P < 0.001). HBeAg seroconversion after 3 years of therapy was achieved in 26 (31.7%) patients. On-treatment HBeAg levels performed better with respect to the prediction of seroconversion than HBsAg and HBV DNA levels. The best cut-off value for the HBeAg level at month 12 for the prediction of seroconversion was 0.62 log(10) PEIU/mL. Although the HBsAg level at baseline is often used to predict the antiviral potency of entecavir, on-treatment HBV DNA and HBeAg levels are more helpful for prediction of subsequent clinical outcomes in HBeAg-positive CHB patients with entecavir treatment.
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Affiliation(s)
- J W Shin
- Department of Internal Medicine, University of Ulsan College of Medicine, Ulsan University Hospital, Ulsan, Korea
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50
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Shin JW, Jung SW, Park BR, Kim CJ, Eum JB, Kim BG, Jeong ID, Bang SJ, Lee SH, Kim SR, Park NH. Prediction of response to entecavir therapy in patients with HBeAg-positive chronic hepatitis B based on on-treatment HBsAg, HBeAg and HBV DNA levels. J Viral Hepat 2012; 19:724-31. [PMID: 22967104 DOI: 10.1111/j.1365-2893.2012.01599.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Quantitative hepatitis B surface antigen (HBsAg) and hepatitis B e antigen (HBeAg) assays are emerging as effective tools of on-treatment predictors of response to antiviral agents, in addition to monitoring serum HBV DNA levels. However, the dynamic relationship between quantitative HBsAg, as well as HBeAg and HBV DNA, and the predictability of subsequent clinical outcomes during entecavir (ETV) therapy remain unclear. Eighty-two patients with HBeAg-positive chronic hepatitis B (CHB) received ETV therapy for ≥3 years. Virologic response (VR) after 3 years of ETV therapy was achieved in 73 (89.0%) patients. Among baseline and on-treatment factors, on-treatment HBV DNA levels performed better with respect to the prediction of response than HBsAg and HBeAg levels. Especially, the performance of absolute values of HBV DNA with respect to response was superior to HBV DNA decline from the baseline. The best predictive value was an absolute HBV DNA level of 2.3 log(10) IU/mL at month 6 (areas under the curve [AUROC], 0.977; 95% CI, 0.940-1.000; P < 0.001). HBeAg seroconversion after 3 years of therapy was achieved in 26 (31.7%) patients. On-treatment HBeAg levels performed better with respect to the prediction of seroconversion than HBsAg and HBV DNA levels. The best cut-off value for the HBeAg level at month 12 for the prediction of seroconversion was 0.62 log(10) PEIU/mL. Although the HBsAg level at baseline is often used to predict the antiviral potency of entecavir, on-treatment HBV DNA and HBeAg levels are more helpful for prediction of subsequent clinical outcomes in HBeAg-positive CHB patients with entecavir treatment.
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Affiliation(s)
- J W Shin
- Department of Internal Medicine, University of Ulsan College of Medicine, Ulsan University Hospital, Ulsan, Korea
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