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Kim AR, Cha J, Kim JS, Ahn CI, Kim Y, Jeong H, Choi SH, Nam SW, Yoon CW, Sohn H. Hydrogen Production from Ammonia Decomposition over Ru-rich Surface on La2O2CO3-Al2O3 Catalyst Beads. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.08.009] [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: 11/02/2022]
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Kwon YW, Lee SH, Kim AR, Kim BJ, Park WS, Hur J, Jang H, Yang HM, Cho HJ, Kim HS. Plant callus-derived shikimic acid regenerates human skin through converting human dermal fibroblasts into multipotent skin-derived precursor cells. Stem Cell Res Ther 2021; 12:346. [PMID: 34116724 PMCID: PMC8196440 DOI: 10.1186/s13287-021-02409-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Accepted: 05/24/2021] [Indexed: 11/10/2022] Open
Abstract
Background The human skin-derived precursors (SKPs) are a good cell source for regeneration. However, the isolation of SKP from human skin is limited. To overcome this drawback, we hypothesized that the component of plant stem cells could convert human fibroblasts to SKPs. Methods Human dermal fibroblasts were treated with shikimic acid, a major component of Sequoiadendron giganteum callus extract. The characteristics of these reprogrammed cells were analyzed by qPCR, western blot, colony-forming assay, and immunofluorescence staining. Artificial human skin was used for CO2 laser-induced wound experiments. Human tissues were analyzed by immunohistochemistry. Results The reprogrammed cells expressed nestin (a neural precursor-specific protein), fibronectin, and vimentin and could differentiate into the ectodermal and mesodermal lineage. Nestin expression was induced by shikimic acid through the mannose receptor and subsequent MYD88 activation, leading to P38 phosphorylation and then CREB binding to the nestin gene promoter. Finally, we confirmed that shikimic acid facilitated the healing of cut injury and enhanced dermal reconstruction in a human artificial skin model. Moreover, in a clinical study with healthy volunteers, plant callus extracts increased the expression of stem cell markers in the basal layer of the epidermis and collagen deposit in the dermis. Conclusions These results indicate that shikimic acid is an effective agent for tissue regeneration. Supplementary Information The online version contains supplementary material available at 10.1186/s13287-021-02409-3.
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Affiliation(s)
- Yoo-Wook Kwon
- Strategic Center of Cell and Bio Therapy for Heart, Diabetes & Cancer, Biomedical Research Institute, Seoul National University Hospital, Seoul, 03080, Republic of Korea
| | - Shin-Hyae Lee
- Clinical Research Team, SK Chemical, Life Science Biz., Seongnam-si, Gyeonggi-do, 13494, Republic of Korea
| | - Ah-Reum Kim
- Skin Research Division, AMOREPACIFIC Corp. R&D Unit, Yongin, -si, Gyeonggi-do, Republic of Korea
| | - Beom Joon Kim
- Departments of Dermatology, Chung-Ang University College of Medicine, Seoul, Republic of Korea
| | - Won-Seok Park
- Skin Research Division, AMOREPACIFIC Corp. R&D Unit, Yongin, -si, Gyeonggi-do, Republic of Korea
| | - Jin Hur
- Department of Convergence Medicine, Pusan National University School of Medicine, Yangsan, 50612, Korea
| | - Hyunduk Jang
- Strategic Center of Cell and Bio Therapy for Heart, Diabetes & Cancer, Biomedical Research Institute, Seoul National University Hospital, Seoul, 03080, Republic of Korea
| | - Han-Mo Yang
- Strategic Center of Cell and Bio Therapy for Heart, Diabetes & Cancer, Biomedical Research Institute, Seoul National University Hospital, Seoul, 03080, Republic of Korea
| | - Hyun-Jai Cho
- Strategic Center of Cell and Bio Therapy for Heart, Diabetes & Cancer, Biomedical Research Institute, Seoul National University Hospital, Seoul, 03080, Republic of Korea
| | - Hyo-Soo Kim
- Strategic Center of Cell and Bio Therapy for Heart, Diabetes & Cancer, Biomedical Research Institute, Seoul National University Hospital, Seoul, 03080, Republic of Korea. .,Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, 03080, Republic of Korea. .,Cardiovascular Center & Department of Internal Medicine, Seoul National University Hospital, Seoul, Republic of Korea.
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Kim SI, Kim AR, Kim SY, Lee JY, Bae YS. High styrene/ethylbenzene selectivity in a metal-organic framework with coordinatively unsaturated cobalt(II) sites. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.116758] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Yoon TU, Kim MJ, Kim AR, Kang JH, Ji D, Bae YS. Cu-impregnated metal–organic frameworks for separation and recovery of CO from blast furnace gas. J IND ENG CHEM 2020. [DOI: 10.1016/j.jiec.2020.03.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Yoon TU, Ahn S, Kim AR, Notestein JM, Farha OK, Bae YS. Cyclohexene epoxidation with H2O2 in the vapor and liquid phases over a vanadium-based metal–organic framework. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00833h] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A V-containing metal–organic framework exhibits significantly different catalytic mechanisms between liquid-phase and gas-phase cyclohexene oxidations.
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Affiliation(s)
- Tae-Ung Yoon
- Department of Chemical and Biomolecular Engineering
- Yonsei University
- Seoul 03722
- Korea
| | - Sol Ahn
- Department of Chemical and Biological Engineering
- Northwestern University
- Evanston
- USA
| | - Ah-Reum Kim
- Department of Chemical and Biomolecular Engineering
- Yonsei University
- Seoul 03722
- Korea
| | - Justin M. Notestein
- Department of Chemical and Biological Engineering
- Northwestern University
- Evanston
- USA
| | - Omar K. Farha
- Department of Chemical and Biological Engineering
- Northwestern University
- Evanston
- USA
- International Institute of Nanotechnology and Department of Chemistry
| | - Youn-Sang Bae
- Department of Chemical and Biomolecular Engineering
- Yonsei University
- Seoul 03722
- Korea
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Han JJ, Nguyen PD, Oh DY, Han JH, Kim AR, Kim MY, Park HR, Tran LH, Dung NH, Koo JW, Lee JH, Oh SH, Anh Vu H, Choi BY. Elucidation of the unique mutation spectrum of severe hearing loss in a Vietnamese pediatric population. Sci Rep 2019; 9:1604. [PMID: 30733538 PMCID: PMC6367484 DOI: 10.1038/s41598-018-38245-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 12/17/2018] [Indexed: 11/09/2022] Open
Abstract
The mutational spectrum of deafness in Indochina Peninsula, including Vietnam, remains mostly undetermined. This significantly hampers the progress toward establishing an effective genetic screening method and early customized rehabilitation modalities for hearing loss. In this study, we evaluated the genetic profile of severe-to-profound hearing loss in a Vietnamese pediatric population using a hierarchical genetic analysis protocol that screened 11 known deafness-causing variants, followed by massively parallel sequencing targeting 129 deafness-associated genes. Eighty-seven children with isolated severe-to-profound non-syndromic hearing loss without family history were included. The overall molecular diagnostic yield was estimated to be 31.7%. The mutational spectrum for severe-to-profound non-syndromic hearing loss in our Vietnamese population was unique: The most prevalent variants resided in the MYO15A gene (7.2%), followed by GJB2 (6.9%), MYO7A (5.5%), SLC26A4 (4.6%), TMC1 (1.8%), ESPN (1.8%), POU3F4 (1.8%), MYH14 (1.8%), EYA1 (1.8%), and MR-RNR1 (1.1%). The unique spectrum of causative genes in the Vietnamese deaf population was similar to that in the southern Chinese deaf population. It is our hope that the mutation spectrum provided here could aid in establishing an efficient protocol for genetic analysis of severe-to-profound hearing loss and a customized screening kit for the Vietnamese population.
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Affiliation(s)
- Jae Joon Han
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Pham Dinh Nguyen
- Department of Otorhinolaryngology, Children's Hospital 1, Ho Chi Minh City, Vietnam
| | - Doo-Yi Oh
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Jin Hee Han
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Ah-Reum Kim
- Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea
| | - Min Young Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Hye-Rim Park
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Lam Huyen Tran
- Department of Otorhinolaryngology, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Nguyen Huu Dung
- Department of Otorhinolaryngology, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Ja-Won Koo
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Jun Ho Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Hospital, Seoul, Korea
| | - Seung Ha Oh
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Hospital, Seoul, Korea
| | - Hoang Anh Vu
- Center for Molecular Biomedicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam.
| | - Byung Yoon Choi
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Bundang Hospital, Seongnam, Korea.
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Kim SY, Yoon TU, Kang JH, Kim AR, Kim TH, Kim SI, Park W, Kim KC, Bae YS. Observation of Olefin/Paraffin Selectivity in Azo Compound and Its Application into a Metal-Organic Framework. ACS Appl Mater Interfaces 2018; 10:27521-27530. [PMID: 30040880 DOI: 10.1021/acsami.8b09739] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Olefin/paraffin separation is an important and challenging issue because the two molecules have similar physicochemical properties. Although a couple of olefin adsorbents have been developed by introducing inorganic nanoparticles into metal-organic frameworks (MOFs), there has been no study on the development of an olefin adsorbent by introducing a certain organic functional group into a MOF. In this study, we posited that azo compounds could offer olefin/paraffin selectivity. We have revealed using first-principles calculations that the simplest aromatic azo compound (azobenzene, Azob) has an unusual propylene/propane selectivity due to special electrostatic interactions between Azob and propylene molecules. On the basis of this interesting discovery, we have synthesized a novel propylene adsorbent, MIL-101(Cr)_DAA, by grafting 4,4'-diaminoazobenzene (DAA) into open metal sites in a mesoporous MIL-101(Cr). Remarkably, MIL-101(Cr)_DAA exhibited enhanced propylene/propane selectivity as well as considerably higher propylene heat of adsorption compared to pristine MIL-101(Cr) while maintaining the high working capacity of MIL-101(Cr). This clearly indicates that azo compounds when introduced into MOFs can provide propylene selectivity. Moreover, MIL-101(Cr)_DAA showed good C3H6/C3H8 separation and easy regeneration performances from packed-bed breakthrough experiments and retained its propylene adsorption capacity even after exposure to air for 12 h. As far as we know, this is the first study that improves the olefin selectivity of MOF by postsynthetically introducing an organic functional group.
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Affiliation(s)
- Seo-Yul Kim
- Department of Chemical and Biomolecular Engineering , Yonsei University , 50 Yonsei-ro , Seodaemun-gu, Seoul 03722 , Korea
| | - Tae-Ung Yoon
- Department of Chemical and Biomolecular Engineering , Yonsei University , 50 Yonsei-ro , Seodaemun-gu, Seoul 03722 , Korea
| | - Jo Hong Kang
- Department of Chemical and Biomolecular Engineering , Yonsei University , 50 Yonsei-ro , Seodaemun-gu, Seoul 03722 , Korea
| | - Ah-Reum Kim
- Department of Chemical and Biomolecular Engineering , Yonsei University , 50 Yonsei-ro , Seodaemun-gu, Seoul 03722 , Korea
| | - Tea-Hoon Kim
- Department of Chemical and Biomolecular Engineering , Yonsei University , 50 Yonsei-ro , Seodaemun-gu, Seoul 03722 , Korea
| | - Seung-Ik Kim
- Department of Chemical and Biomolecular Engineering , Yonsei University , 50 Yonsei-ro , Seodaemun-gu, Seoul 03722 , Korea
| | - Wanje Park
- Department of Chemical and Biomolecular Engineering , Yonsei University , 50 Yonsei-ro , Seodaemun-gu, Seoul 03722 , Korea
| | - Ki Chul Kim
- Department of Chemical Engineering , Konkuk University , Seoul 05029 , Republic of Korea
| | - Youn-Sang Bae
- Department of Chemical and Biomolecular Engineering , Yonsei University , 50 Yonsei-ro , Seodaemun-gu, Seoul 03722 , Korea
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Yoon JW, Yoon TU, Kim EJ, Kim AR, Jung TS, Han SS, Bae YS. Highly selective adsorption of CO over CO 2 in a Cu(I)-chelated porous organic polymer. J Hazard Mater 2018; 341:321-327. [PMID: 28800566 DOI: 10.1016/j.jhazmat.2017.07.065] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 07/25/2017] [Accepted: 07/28/2017] [Indexed: 06/07/2023]
Abstract
Cu(I) species were successfully chelated to nitrogen atoms in a nitrogen-rich porous organic polymer (SNW-1) by mixing with a CuCl solution (Scheme 1). Although pristine SNW-1 adsorbs CO2 better than CO, Cu(I)-incorporated SNW-1 (nCu(I)@SNW-1) shows selective CO adsorption over CO2 because of the π-complexation of CO with Cu(I). To the best of our knowledge, this is the first CO/CO2 selectivity observed for POP-based materials. 1.3Cu(I)@SNW-1 exhibits high CO/CO2 selectivity (23) at 1bar and a large CO working capacity (0.6mmol/g) at 0.1-1bar. Moreover, the breakthrough and thermogravimetric experiments show that 1.3Cu(I)@SNW-1 can effectively separate CO from CO2 under dynamic mixture conditions and can be easily regenerated under mild regeneration conditions without heating the column. Furthermore, 1.3Cu(I)@SNW-1 exhibited a good stability under exposure to atmospheric air for 3h or 9h. These results suggest that chelating Cu(I) species to a nitrogen-rich porous organic polymer can be an efficient strategy to separate and recover CO from CO/CO2 mixtures.
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Affiliation(s)
- Jung Woon Yoon
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Tae-Ung Yoon
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Eun-Jung Kim
- Graduate School of Integrated Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Ah-Reum Kim
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Tae-Sung Jung
- Clean Fuel Laboratory, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea
| | - Sang-Sup Han
- Clean Fuel Laboratory, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea
| | - Youn-Sang Bae
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea; Graduate School of Integrated Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.
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Pavlenko TA, Kim AR, Kurina AY, Davydova NG, Kolomojceva EM, Chesnokova NB, Ugrumov MV. [Endothelins and dopamine levels in tears for assessment of neurovascular disorders in glaucoma]. Vestn Oftalmol 2018; 134:41-46. [PMID: 30166509 DOI: 10.17116/oftalma201813404141] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
PURPOSE To estimate the possibility of detection of neurovascular ocular disorders in glaucoma by assessing the content of catecholamines and endothelins in lacrimal fluid. MATERIAL AND METHODS The study included 47 patients with primary open-angle glaucoma (POAG). Tear eluate was analyzed by high performance liquid chromatography (HPLC) for catecholamines concentrations, and enzyme-linked immunoassay (ELISA) was used for evaluation of endothelins content. RESULTS Endothelin-1 (ET-1) and big endothelin (bET) content in tears of patients with POAG was higher than in healthy controls. Concentration of dopamine (DA) in tears was lower and concentrations of L-dioxyphenylalanine and dihydroxyphenylacetic acid had a tendency for decrease. Noradrenaline content was equal in patients with POAG and controls. Adrenaline was not detected in any tear samples. CONCLUSION Multidirectional changes of endothelins and DA levels in tears of patients with POAG was found. The increased concentration of ET-1 and its precursor bET promote vasoconstriction and decrease of aqueous humor outflow. The decrease of DA concentration is typical for neurodegenerative processes. Estimation of DA and endothelins concentrations in tears can enable early detection of neurovascular disorders in glaucoma patients and help evaluate their severity.
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Affiliation(s)
- T A Pavlenko
- Moscow Helmholtz Research Institute of Eye Diseases, 14/19 Sadovaya-Chernogryazskaya St., Moscow, Russian Federation, 105062
| | - A R Kim
- Koltzov Institute of Developmental Biology, 26 Vavilova St., Moscow, Russian Federation, 119334
| | - A Yu Kurina
- Koltzov Institute of Developmental Biology, 26 Vavilova St., Moscow, Russian Federation, 119334
| | - N G Davydova
- Moscow Helmholtz Research Institute of Eye Diseases, 14/19 Sadovaya-Chernogryazskaya St., Moscow, Russian Federation, 105062
| | - E M Kolomojceva
- Moscow Helmholtz Research Institute of Eye Diseases, 14/19 Sadovaya-Chernogryazskaya St., Moscow, Russian Federation, 105062
| | - N B Chesnokova
- Moscow Helmholtz Research Institute of Eye Diseases, 14/19 Sadovaya-Chernogryazskaya St., Moscow, Russian Federation, 105062
| | - M V Ugrumov
- Koltzov Institute of Developmental Biology, 26 Vavilova St., Moscow, Russian Federation, 119334
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Kwon IS, Kwak Jong Hwan K, Pyo S, Kim AR, Schmitz FJ. A New Anthranilic Acid Derivative from Oscarella stillans as Regulator of Inflammatory Cytokines in Macrophages. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608162] [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: 10/18/2022]
Affiliation(s)
- IS Kwon
- School of Pharmacy, Sungkyunkwan University, Suwon, Korea, Republic of (South)
| | - K Kwak Jong Hwan
- School of Pharmacy, Sungkyunkwan University, Suwon, Korea, Republic of (South)
| | - S Pyo
- School of Pharmacy, Sungkyunkwan University, Suwon, Korea, Republic of (South)
| | - AR Kim
- Department of Chemistry and Biochemistry, University of Oklahoma, Norman, OK, United States
| | - FJ Schmitz
- Department of Chemistry and Biochemistry, University of Oklahoma, Norman, OK, United States
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Kim AR, Min JH, Lee KH, Kim CS. PCA22 acts as a suppressor of atrzf1 to mediate proline accumulation in response to abiotic stress in Arabidopsis. J Exp Bot 2017; 68:1797-1809. [PMID: 28369480 PMCID: PMC5444443 DOI: 10.1093/jxb/erx069] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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: 05/08/2023]
Abstract
Proline metabolism is important for environmental responses, plant growth, and development. However, its precise roles in plant abiotic stress tolerance are not well understood. Mutants are valuable for the identification of new genes and for elucidating their roles in physiological mechanisms. We applied a suppressor mutation approach to identify novel genes involved in the regulation of proline metabolism in Arabidopsis. Using the atrzf1 (Arabidopsis thaliana ring zinc finger 1) mutant as a parental line for activation tagging mutagenesis, we selected several mutants with suppressed induction of proline accumulation under dehydration conditions. One of the selected mutants [proline content alterative 22 (pca22)] appeared to have reduced proline contents compared with the atrzf1 mutant under drought stress. Generally, pca22 mutant plants displayed suppressed atrzf1 insensitivity to dehydration and abscisic acid during early seedling growth. Additionally, the pca22 mutant exhibited shorter pollen tube length than wild-type (WT) and atrzf1 plants. Furthermore, PCA22-overexpressing plants were more sensitive to dehydration stress than the WT and RNAi lines. Green fluorescent protein-tagged PCA22 was localized to the cytoplasm of transgenic Arabidopsis cells. Collectively, these results suggest that pca22 acts as dominant suppressor mutant of atrzf1 in the abiotic stress response.
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Affiliation(s)
- Ah-Reum Kim
- Department of Plant Biotechnology, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Ji-Hee Min
- Department of Plant Biotechnology, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Kyeong-Hwan Lee
- Department of Rural and Biosystems Engineering, Agricultural Robotics and Automation Research Center, Chonnam National University, Gwangju 61186, Republic of Korea
| | - Cheol Soo Kim
- Department of Plant Biotechnology, Chonnam National University, Gwangju 61186, Republic of Korea
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Park SJ, Kim AR, Hong JT, Park JY, Lee S, Ahn YH. Crystallization Kinetics of Lead Halide Perovskite Film Monitored by In Situ Terahertz Spectroscopy. J Phys Chem Lett 2017; 8:401-406. [PMID: 28050908 DOI: 10.1021/acs.jpclett.6b02691] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Vibrational modes in the terahertz (THz) frequency range are good indicators of lead halide perovskite's crystallization phase. We performed real-time THz spectroscopy to monitor the crystallization kinetics in the perovskite films. First, THz absorptance was measured while the perovskite film was annealed at different temperatures. By analyzing the Avrami exponent, we observed an abrupt dimensionality switch (from 1D to 2D) with increasing temperature starting at approximately 90 °C. We also monitored the laser-induced crystallinity enhancement of the preannealed perovskite film. The THz absorptance increased initially, then subsequently decayed over a couple of hours, although the enhancement factor varies depending on the film crystallinity. In particular, the Avrami analysis implied that the light-induced crystallization was assisted by the 1D diffusion processes. The activation photon energy was measured at 2.3 eV, which indicated that enhanced crystallization originated from the photoinduced structural change of residual lead iodide at the grain boundary.
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Affiliation(s)
- S J Park
- Department of Physics and Department of Energy Systems Research, Ajou University , Suwon 16499, Korea
| | - A R Kim
- Department of Physics and Department of Energy Systems Research, Ajou University , Suwon 16499, Korea
| | - J T Hong
- Department of Physics and Department of Energy Systems Research, Ajou University , Suwon 16499, Korea
| | - J Y Park
- Department of Physics and Department of Energy Systems Research, Ajou University , Suwon 16499, Korea
| | - S Lee
- Department of Physics and Department of Energy Systems Research, Ajou University , Suwon 16499, Korea
| | - Y H Ahn
- Department of Physics and Department of Energy Systems Research, Ajou University , Suwon 16499, Korea
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Lee SJ, Yoon TU, Kim AR, Kim SY, Cho KH, Hwang YK, Yeon JW, Bae YS. Adsorptive separation of xenon/krypton mixtures using a zirconium-based metal-organic framework with high hydrothermal and radioactive stabilities. J Hazard Mater 2016; 320:513-520. [PMID: 27597151 DOI: 10.1016/j.jhazmat.2016.08.057] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 08/21/2016] [Accepted: 08/22/2016] [Indexed: 06/06/2023]
Abstract
The separation of xenon/krypton mixtures is important for both environmental and industrial purposes. The potential of three hydrothermally stable MOFs (MIL-100(Fe), MIL-101(Cr), and UiO-66(Zr)) for use in Xe/Kr separation has been experimentally investigated. From the observed single-component Xe and Kr isotherms, isosteric heat of adsorption (Qsto), and IAST-predicted Xe/Kr selectivities, we observed that UiO-66(Zr) has the most potential as an adsorbent among the three candidate MOFs. We performed dynamic breakthrough experiments with an adsorption bed filled with UiO-66(Zr) to evaluate further the potential of UiO-66(Zr) for Xe/Kr separation under mixture flow conditions. Remarkably, the experimental breakthrough curves show that UiO-66(Zr) can efficiently separate the Xe/Kr mixture. Furthermore, UiO-66(Zr) maintains most of its Xe and Kr uptake capacity, as well as its crystallinity and internal surface area, even after exposure to gamma radiation (2kGy) for 7h and aging for 16 months under ambient conditions. This result indicates that UiO-66(Zr) can be considered to be a potential adsorbent for Xe/Kr mixtures under both ambient and radioactive conditions.
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Affiliation(s)
- Seung-Joon Lee
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea
| | - Tae-Ung Yoon
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea
| | - Ah-Reum Kim
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea
| | - Seo-Yul Kim
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea
| | - Kyung-Ho Cho
- Research Group for Nanocatalyst, Korea Research Institute of Chemical Technology (KRICT), Daejeon, Korea
| | - Young Kyu Hwang
- Research Group for Nanocatalyst, Korea Research Institute of Chemical Technology (KRICT), Daejeon, Korea
| | - Jei-Won Yeon
- Nuclear Chemistry Research Division, Korea Atomic Energy Research Institute (KAERI), Daejeon, Korea
| | - Youn-Sang Bae
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea.
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Kim AR, Yoon BK, Park H, Seok JW, Choi H, Yu JH, Choi Y, Song SJ, Kim A, Kim JW. Caffeine inhibits adipogenesis through modulation of mitotic clonal expansion and the AKT/GSK3 pathway in 3T3-L1 adipocytes. BMB Rep 2016; 49:111-5. [PMID: 26350746 PMCID: PMC4915114 DOI: 10.5483/bmbrep.2016.49.2.128] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Indexed: 11/24/2022] Open
Abstract
Caffeine has been proposed to have several beneficial effects on obesity and its related metabolic diseases; however, how caffeine affects adipocyte differentiation has not been elucidated. In this study, we demonstrated that caffeine suppressed 3T3-L1 adipocyte differentiation and inhibited the expression of CCAAT/enhancer binding protein (C/EBP)α and peroxisome proliferator-activated receptor (PPAR)γ, two main adipogenic transcription factors. Anti-adipogenic markers, such as preadipocyte secreted factor (Pref)-1 and Krüppel-like factor 2, remained to be expressed in the presence of caffeine. Furthermore, 3T3-L1 cells failed to undergo typical mitotic clonal expansion in the presence of caffeine. Investigation of hormonal signaling revealed that caffeine inhibited the activation of AKT and glycogen synthase kinase (GSK) 3 in a dose-dependent manner, but not extracellular signal-regulated kinase (ERK). Our data show that caffeine is an anti-adipogenic bioactive compound involved in the modulation of mitotic clonal expansion during adipocyte differentiation through the AKT/GSK3 pathway. [BMB Reports 2016; 49(2): 111-115]
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Affiliation(s)
- Ah-Reum Kim
- Department of Biochemistry and Molecular Biology, Integrated Genomic Research Center for Metabolic Regulation, Institute of Genetic Science, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Bo Kyung Yoon
- Yonsei University College of Medicine, Seoul 03722, Korea
| | - Hyounkyoung Park
- Department of Biochemistry and Molecular Biology, Integrated Genomic Research Center for Metabolic Regulation, Institute of Genetic Science, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Jo Woon Seok
- Department of Biochemistry and Molecular Biology, Integrated Genomic Research Center for Metabolic Regulation, Institute of Genetic Science, Yonsei University College of Medicine; Brain Korea 21 PLUS Project for Medical Science, Yonsei University, Seoul 03722, Korea
| | - Hyeonjin Choi
- Department of Biochemistry and Molecular Biology, Integrated Genomic Research Center for Metabolic Regulation, Institute of Genetic Science, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Jung Hwan Yu
- Department of Biochemistry and Molecular Biology, Integrated Genomic Research Center for Metabolic Regulation, Institute of Genetic Science, Yonsei University College of Medicine; Brain Korea 21 PLUS Project for Medical Science, Yonsei University, Seoul 03722, Korea
| | - Yoonjeong Choi
- Department of Biochemistry and Molecular Biology, Integrated Genomic Research Center for Metabolic Regulation, Institute of Genetic Science, Yonsei University College of Medicine; Brain Korea 21 PLUS Project for Medical Science, Yonsei University, Seoul 03722, Korea
| | - Su Jin Song
- Department of Biochemistry and Molecular Biology, Integrated Genomic Research Center for Metabolic Regulation, Institute of Genetic Science, Yonsei University College of Medicine; Brain Korea 21 PLUS Project for Medical Science, Yonsei University, Seoul 03722, Korea
| | - Ara Kim
- Department of Biochemistry and Molecular Biology, Integrated Genomic Research Center for Metabolic Regulation, Institute of Genetic Science, Yonsei University College of Medicine; Brain Korea 21 PLUS Project for Medical Science, Yonsei University, Seoul 03722, Korea
| | - Jae-Woo Kim
- Department of Biochemistry and Molecular Biology, Integrated Genomic Research Center for Metabolic Regulation, Institute of Genetic Science, Yonsei University College of Medicine; Brain Korea 21 PLUS Project for Medical Science, Yonsei University; Severance Biomedical Science Institute, Yonsei University College of Medicine, Seoul 03722, Korea
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15
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Joo KM, Kim AR, Kim SN, Kim BM, Lee HK, Bae S, Lee JH, Lim KM. Metabolomic analysis of amino acids and lipids in human hair altered by dyeing, perming and bleaching. Exp Dermatol 2016; 25:729-31. [PMID: 27060282 DOI: 10.1111/exd.13025] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/29/2016] [Indexed: 11/29/2022]
Affiliation(s)
- Kyung-Mi Joo
- AMOREPACIFIC CO/R&D Center, Yongin-si, Gyeonggi-do, Korea
| | - Ah-Reum Kim
- AMOREPACIFIC CO/R&D Center, Yongin-si, Gyeonggi-do, Korea
| | - Su-Na Kim
- AMOREPACIFIC CO/R&D Center, Yongin-si, Gyeonggi-do, Korea
| | - Boo-Min Kim
- AMOREPACIFIC CO/R&D Center, Yongin-si, Gyeonggi-do, Korea
| | - Hae Kwang Lee
- AMOREPACIFIC CO/R&D Center, Yongin-si, Gyeonggi-do, Korea
| | - SeungJin Bae
- College of Pharmacy, Ewha Womans University, Seoul, Korea
| | - John-Hwan Lee
- AMOREPACIFIC CO/R&D Center, Yongin-si, Gyeonggi-do, Korea
| | - Kyung-Min Lim
- College of Pharmacy, Ewha Womans University, Seoul, Korea
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16
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Kim SY, Kim SH, Kim SN, Kim AR, Kim YR, Kim MJ, Park WS, Lee JH, Jung WH, Lee YW, Choe YB, Ahn KJ. Isolation and identification of Malassezia species from Chinese and Korean patients with seborrheic dermatitis and in vitro studies on their bioactivity on sebaceous lipids and IL-8 production. Mycoses 2016; 59:274-80. [PMID: 26786542 DOI: 10.1111/myc.12456] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 11/10/2015] [Accepted: 12/10/2015] [Indexed: 11/30/2022]
Abstract
We investigated the distribution of Malassezia yeast in 120 Chinese (20 patients from each of six cities) and 20 Korean patients with scalp seborrheic dermatitis (SD) and dandruff (SD/D) using ITS1 and ITS2 polymerase chain reaction-restriction fragment length polymorphism. Bioactivity was studied by quantifying sebum lipid production by human primary sebocytes and inflammatory cytokine, interleukin-8 (IL-8) production was studied by exposing HaCaT keratinocytes with extracts of five standard Malassezia strains; M. globosa, M. restricta, M. sympodialis, M. dermatis and M. slooffiae. M. restricta and M. globosa were the most frequently encountered species from both Chinese and Korean patients. These two Malassezia species also promoted neutral lipid synthesis although the result was not statistically significant and induced significant increase in IL-8 production among the five Malassezia species studied. The study suggests a possible role of these organisms in the pathogenesis of SD/D.
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Affiliation(s)
- Soo Young Kim
- Department of Dermatology, Konkuk University School of Medicine, Seoul, Korea
| | | | - Su Na Kim
- AMOREPACIFIC Corp. R&D Unit, Yongin, Korea
| | | | - Yu Ri Kim
- Department of Dermatology, Konkuk University School of Medicine, Seoul, Korea
| | - Min Jung Kim
- Department of Dermatology, Konkuk University School of Medicine, Seoul, Korea
| | | | | | - Won Hee Jung
- Department of Systems Biotechnology, Chung-Ang University, Anseong, Korea
| | - Yang Won Lee
- Department of Dermatology, Konkuk University School of Medicine, Seoul, Korea.,Research Institute of Medical Science, Konkuk University, Seoul, Korea
| | - Yong Beom Choe
- Department of Dermatology, Konkuk University School of Medicine, Seoul, Korea.,Research Institute of Medical Science, Konkuk University, Seoul, Korea
| | - Kyu Joong Ahn
- Department of Dermatology, Konkuk University School of Medicine, Seoul, Korea.,Research Institute of Medical Science, Konkuk University, Seoul, Korea
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Kim AR, Ugryumov MV. Changes in plasma catecholamines levels as preclinical biomarkers in experimental models of Parkinson's disease. DOKL BIOCHEM BIOPHYS 2015; 464:308-11. [PMID: 26518555 DOI: 10.1134/s1607672915050105] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Indexed: 11/23/2022]
Abstract
The goal of this study was to investigate the changes in the concentrations of blood plasma catecholamines as possible biomarkers of Parkinson's disease (PD) in the mouse experimental model of PD induced by 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP). A significant decrease was detected in the levels of dopamine and L-DOPA in the PD preclinical stage model as a result of the catecholamines systemic metabolism disfunction. In the PD early clinical stage models, the level of L-DOPA and dihydroxyphenylacetic acid decreased, which is consistent with the results of blood tests in untreated patients.
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Affiliation(s)
- A R Kim
- Koltzov Institute of Developmental Biology, Russian Academy of Sciences, ul. Vavilova 26, Moscow, 119334, Russia.
| | - M V Ugryumov
- Koltzov Institute of Developmental Biology, Russian Academy of Sciences, ul. Vavilova 26, Moscow, 119334, Russia
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18
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Kim AR, Ugriumov MV. Cooperative synthesis of dopamine in the striatum of normal and parkinsonial mice. DOKL BIOCHEM BIOPHYS 2015; 460:49-52. [PMID: 25772991 DOI: 10.1134/s1607672915010147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Indexed: 11/22/2022]
Affiliation(s)
- A R Kim
- Koltzov Institute of Developmental Biology, Russian Academy of Sciences, ul. Vavilova 26, Moscow, 119334, Russia,
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19
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Na Y, Choi YJ, Bae S, C H O MR, Kim AR, Kang IH, Chung IW, Yun MS, Lim SH, Kang KS. Off-Label Use of Anticancer Drugs In South Korea. Value Health 2014; 17:A656. [PMID: 27202379 DOI: 10.1016/j.jval.2014.08.2394] [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] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
- Y Na
- The Health Insurance Review and Assessment Service, Seoul, South Korea
| | - Y J Choi
- The Health Insurance Review and Assessment Service, Seoul, South Korea
| | - S Bae
- The Health Insurance Review and Assessment Service, Seoul, South Korea
| | - M R C H O
- The Health Insurance Review and Assessment Service, Seoul, South Korea
| | - A R Kim
- The Health Insurance Review and Assessment Service, Seoul, South Korea
| | - I H Kang
- The Health Insurance Review and Assessment Service, Seoul, South Korea
| | - I W Chung
- The Health Insurance Review and Assessment Service, Seoul, South Korea
| | - M S Yun
- The Health Insurance Review and Assessment Service, Seoul, South Korea
| | - S H Lim
- The Health Insurance Review and Assessment Service, Seoul, South Korea
| | - K S Kang
- The Health Insurance Review and Assessment Service, Seoul, South Korea
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Park JH, Kim NKD, Kim AR, Koo JW, Oh SH, Park WY, Choi BY. Efficiency of Exploration of Molecular Genetic Etiology for Cochlear Implantees and Its Implication. Otolaryngol Head Neck Surg 2014. [DOI: 10.1177/0194599814541629a212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Objectives: Evaluate the efficiency of exploration of molecular genetic etiology for cochlear implantees (CI). Methods: Ninety-four patients of 273 CIs who consented to molecular genetic testing (MGT) were included. Patients with either a characteristic radiologic or audiologic marker were subject to Sanger sequencing of corresponding candidate genes. The GJB2 gene was sequenced in patients with no phenotypic marker. Targeted resequencing of known 200 deafness genes (TRS-200) was applied to GJB2-negative cases with no phenotypic marker. The recurrence risk of hearing loss (HL) between undiagnosed probands after TRS-200 and diagnosed probands with autosomal recessive genotype was evaluated. Results: Thirty of 42 probands (71.4%) who underwent the direct Sanger sequencing of candidate genes were diagnosed. The most rewarding phenotypic markers were enlarged vestibular aqueduct (with/without incomplete partition [IP] type II) and IP type III, followed by long QT syndrome, lateral semicircular canal dysplasia as a part of the constellation of anomalies suggesting a CHARGE syndrome, and ski-slope type high frequency HL. Focusing upon these 5 markers, the detection rate went up to 83.3% (30/36). Ten of 52 probands carried mutant allele of GJB2. The detection rate by TRS-200 was 26.0% (12/46). The recurrent risk of HL was calculated to 0.03 (95% confidence interval [CI] 0-0.13) in undiagnosed group and 0.18 (95% CI 0.09-0.34) in diagnosed probands. Conclusions: Molecular genetic diagnosis was made in 55.3% (52/94) of CIs through our hierarchical MGT. The sequencing of high-yield candidate genes associated with phenotypic markers will be useful for evaluating deaf patients cost-effectively before applying next generation sequencing. A Mendelian genetic etiology does not seem to contribute to undiagnosed probands after TRS-200.
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Kang EJ, Jung H, Woo OH, Park KH, Woo SU, Yang DS, Kim AR, Lee JB, Kim YH, Kim JS, Seo JH. Association of aldehyde dehydrogenase 1 expression and biologically aggressive features in breast cancer. Neoplasma 2014; 61:352-62. [PMID: 24824938 DOI: 10.4149/neo_2014_045] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
UNLABELLED Aldehyde dehydrogenase 1 (ALDH1) has been regarded as a breast cancer stem cell marker. Several studies have reported that ALDH1 expression is associated with poor prognosis in breast cancer. We aimed, therefore, to determine the prognostic value of ALDH1 expression and its association with several biomarkers in breast cancer tissue using immunohistochemistry. Furthermore, we investigated the characteristics of and differences between cellular and stromal expression of ALDH1. We performed tissue microarray (TMA) analysis of 425 breast cancer tissue samples collected during surgery. Immunohistochemical staining was then performed to measure the expression of ALDH1 and other breast cancer biomarkers. Statistical analysis of the relationship between ALDH1 expression and clinicopathologic characteristics was performed for 390 TMA samples. We found that ALDH1 was expressed in 71 cases (18.2%) in the tumor cells and/or stroma. Of these cases, 38 (9.7%) showed ALDH1 expression in tumor cells and 38 (9.7%) showed ALDH1 expression in the stroma. ALDH1 expression was significantly associated with markers of a poor prognosis, such as young age, estrogen receptor negativity, progesterone receptor negativity, a high histological grade, and a high Ki-67 index. However, ALDH1 expression was not associated with p53, transforming growth factor-beta, Gli-1, YKL-40, or sonic hedgehog expression status. With regard to the expression site, the clinical characteristics did not differ between cases of cellular expression and those of stromal expression. However, ALDH1 expression in tumor cells was correlated with hormone receptor status, histological grade, molecular subtype, epidermal growth factor receptor expression status, and cytokeratin 5/6 expression status while stromal expression of ALDH1 was only correlated with hormone receptor status. Overall, these findings suggest that ALDH1 expression in tumor tissue is associated with a biologically aggressive phenotype. KEYWORDS ALDH1, biologically aggressive, breast cancer.
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22
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Kim AR, Kim SN, Jung IK, Kim HH, Park YH, Park WS. The inhibitory effect of Scutellaria baicalensis extract and its active compound, baicalin, on the translocation of the androgen receptor with implications for preventing androgenetic alopecia. Planta Med 2014; 80:153-158. [PMID: 24496985 DOI: 10.1055/s-0033-1360300] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Androgens affect several human skin and prostate functions, and the androgen receptor is crucial for regulating the androgen-related mechanisms. In this study, we assessed the antagonizing effects of a Scutellaria baicalensis extract and its main component baicalin on proliferation of human scalp dermal papilla cells. First, the extract and baicalin slightly dissociated the radioisotope-labeled androgen receptor-agonist complex in the androgen receptor binding assay, and the IC50 values were measured to assess the androgen receptor antagonistic effect of the extract (93 µg/mL) and baicalin (54.1 µM). Second, the extract and baicalin treatments dose-dependently inhibited the overgrowth of LNCaP prostate cancer cells, which were stimulated by dihydrotestosterone. Third, the extract and baicalin inhibited nuclear translocation of the androgen receptor stimulated by dihydrotestosterone in human dermal papilla cells. Additionally, the extract and baicalin enhanced proliferation of human dermal papilla cells in vitro. These results show that the extract and baicalin inhibited androgen activation signaling and promoted hDPC proliferation, suggesting that they could be used as active ingredients for treating androgen-associated disorders, such as androgenetic alopecia.
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Affiliation(s)
- Ah-Reum Kim
- Advanced Hair Research Laboratory, AMOREPACIFIC Corp. R&D Unit, Gyeonggi Province, South Korea
| | - Su-Na Kim
- Advanced Hair Research Laboratory, AMOREPACIFIC Corp. R&D Unit, Gyeonggi Province, South Korea
| | - In-Keun Jung
- Analysis Research Team, AMOREPACIFIC Corp. R&D Unit, Gyeonggi Province, South Korea
| | - Hyun-Hee Kim
- Analysis Research Team, AMOREPACIFIC Corp. R&D Unit, Gyeonggi Province, South Korea
| | - Young-Ho Park
- Medical Beauty Research Division, AMOREPACIFIC Corp. R&D Unit, Gyeonggi Province, South Korea
| | - Won-Seok Park
- Advanced Hair Research Laboratory, AMOREPACIFIC Corp. R&D Unit, Gyeonggi Province, South Korea
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Park PJ, Moon BS, Lee SH, Kim SN, Kim AR, Kim HJ, Park WS, Choi KY, Cho EG, Lee TR. Hair growth-promoting effect of Aconiti Ciliare Tuber extract mediated by the activation of Wnt/β-catenin signaling. Life Sci 2012; 91:935-43. [DOI: 10.1016/j.lfs.2012.09.008] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Revised: 08/31/2012] [Accepted: 09/07/2012] [Indexed: 01/13/2023]
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Kim HS, Kim DK, Kim AR, Mun SH, Lee SK, Kim JH, Kim YM, Choi WS. Fyn positively regulates the activation of DAP12 and FcRγ-mediated costimulatory signals by RANKL during osteoclastogenesis. Cell Signal 2012; 24:1306-14. [PMID: 22387224 DOI: 10.1016/j.cellsig.2012.02.014] [Citation(s) in RCA: 10] [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: 02/04/2012] [Accepted: 02/19/2012] [Indexed: 12/26/2022]
Abstract
Osteoclasts (OCs) are the only bone-resorbing cells and are critically involved in various bone-associated diseases, including osteoporosis and rheumatoid arthritis. Differentiation of OCs from bone marrow macrophage cells (BMMs) is regulated by RANK and the adaptor protein (DAP12/FcRγ)-mediated costimulatory signals. However, it is unknown how RANKL/RANK signal stimulates phosphorylation of DAP12/FcRγ to initiate the costimulatory signals. As reported here, we found that OC differentiation and acquisition of bone resorption capacity were suppressed in RANKL-stimulated Fyn(-/-) or Fyn-siRNA-transfected BMMs, but could be restored by overexpression of Fyn kinase in Fyn(-/-) BMMs. However, the RANKL-stimulated proliferation of BMMs was unaffected by the absence of Fyn. In addition, RANKL-stimulated Fyn(-/-) BMMs no longer exhibited the optimal induction of typical OC markers such as NFATc1, c-Fos, c-Src, TRAF6, and cathepsin K or costimulatory signals such as the activating phosphorylations of Syk, PLCγ2, and Gab2. These were restored by overexpression of Fyn in Fyn(-/-) BMMs. Immunoprecipitation studies also indicated that the adaptor proteins DAP12/FcRγ and Syk interacted with RANK during RANKL stimulation in BMMs in a Fyn-dependent manner. Phosphorylation of the DAP12/FcRγ and the recruitment of Syk by DAP12/FcRγ were suppressed in Fyn(-/-) BMMs. This is the first demonstration that Fyn relays the initial RANK/RANKL signal to the ITAM-containing adaptors DAP12/FcRγ for OC differentiation.
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Affiliation(s)
- H S Kim
- Department of Immunology, College of Medicine, Konkuk University, Chungju 380-701, Republic of Korea
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25
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Park JH, Seo DC, Kim AR, Kim SH, Lee CH, Lee ST, Jeong TU, Lee SW, Ha YR, Cho JS, Heo JS. Treatment Efficiencies and Decomposition Velocities of Pollutants in Constructed Wetlands for Treating Hydroponic Wastewater. ACTA ACUST UNITED AC 2011. [DOI: 10.7745/kjssf.2011.44.5.937] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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26
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Nam JS, Kim AR, Yoon JC, Byun Y, Kim SA, Kim KR, Cho S, Seong BL, Ahn CW, Lee JM. The humoral immune response to the inactivated influenza A (H1N1) 2009 monovalent vaccine in patients with Type 2 diabetes mellitus in Korea. Diabet Med 2011; 28:815-7. [PMID: 21672004 DOI: 10.1111/j.1464-5491.2011.03255.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [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] [Indexed: 11/28/2022]
Abstract
AIMS We evaluated the antibody response to a single-dose adjuvanted, inactivated, pandemic H1N1 influenza vaccination in patients with diabetes and assessed factors associated with the failure to induce antibody responses. METHODS Eighty-two patients with Type 2 diabetes were vaccinated and antibody responses were determined with haemagglutination inhibition assay and anti-haemagglutinin antibody ELISA. RESULTS Among 70 antibody-negative patients at baseline, 34 (48.6%) achieved seroconversion; 28 (60.9%) in the young adults group and six (25%) in the elderly group acquired H1N1-specific antibodies. Patients in the older age range or with longer duration of diabetes had a lower seroconversion rate. CONCLUSIONS Our data show low cross-reactive antibody carrying rate and low seroconversion rate in patients with diabetes. Until larger-scale, case-controlled trials become available, older patients and patients with a longer duration of diabetes should be considered for the two-dose vaccination or have antibody titres measured after the first vaccination.
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Affiliation(s)
- J S Nam
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
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Seo DC, Park JH, Cheon YS, Park SK, Kim AR, Lee WG, Lee SW, Lee ST, Cho JS, Heo JS. Treatment Efficiency of Pollutants in Constructed Wetlands under Different Hydroponic Wastewater Injection Methods and Characteristic of Filter Media. ACTA ACUST UNITED AC 2010. [DOI: 10.5338/kjea.2010.29.2.146] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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28
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Jang YH, Lee YC, Park NH, Shin HY, Mun KC, Choi MS, Lee MY, Kim AR, Kim JM, Lee SR, Park HR. Polyphenol (-)-epigallocatechin gallate protection from ischemia/reperfusion-induced renal injury in normotensive and hypertensive rats. Transplant Proc 2006; 38:2190-4. [PMID: 16980039 DOI: 10.1016/j.transproceed.2006.06.101] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
INTRODUCTION The effect of epigallocatechin gallate (EGCG) in an in vivo renal model of ischemia with reperfusion (I/R) was compared between normotensive (WKR) and hypertensive (SHR) rats. METHODS WKR (groups I, II, III) and SHR groups (groups IV, V, VI) were divided into three types. Groups I and IV were sham-operated animals; groups II and V were subjected to 45 minutes of renal I/R; and groups III and VI received 10 mg/kg EGCG intravenously at the time of reperfusion. Three days after renal I/R, we compared renal function markers, malondialdehyde (MDA), and histologic changes. RESULTS Following renal I/R, levels of blood urea nitrogen (BUN) and serum creatinine (sCr) were increased and serum creatinine clearance (CrCl) decreased in group V compared to group II (P < .001). Those receiving EGCG treatment (groups III and VI) had decreased BUN and sCr compared to non-EGCG I/R groups (P < .001), but not surprisingly, higher than sham groups. CrCl was lowest in the SHR groups. The MDA was significantly decreased after EGCG treatment (P = .028 in group III, P = .002 in group VI). Following renal I/R, tissue necrosis was more severe among SHR (P < .001). However, the ratio of regeneration to damage significantly increased in SHR after EGCG treatment. CONCLUSIONS The reperfusion injury was greater among SHR compared with WKR in terms of renal function, lipid peroxidation, and tissue damage. EGCG treatment significantly ameliorated renal impairment and promoted tissue regeneration following renal I/R.
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Affiliation(s)
- Y H Jang
- Institute for Medical Science, Keimyung University, Dongsan Medical Center, 194 Dongsan-dong, Jung-gu, Daegu, South Korea 700-712.
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Koh SB, Suh SI, Lee DH, Kim AR, Oh CH, Yoon JS, Weon BM, Seol SK, Pyun AR, Je JH, Hwu Y, Margaritondo G. Phase contrast radiography of Lewy bodies in Parkinson disease. Neuroimage 2006; 32:566-9. [PMID: 16766209 DOI: 10.1016/j.neuroimage.2006.04.217] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2005] [Revised: 02/23/2006] [Accepted: 04/05/2006] [Indexed: 11/24/2022] Open
Abstract
Parkinson's disease (PD), defined as a neurodegenerative disorder, is characterized by the loss of dopaminergic neurons and the presence of Lewy bodies in neurons. Morphological study of Lewy bodies is important to identify the causes and the processes of PD. Here, we investigate a possibility of phase contrast radiography using coherent synchrotron X-rays to explore the microscopic details of Lewy bodies in thick (approximately 3 mm) midbrain tissues. Autopsied midbrain tissues of a PD patient were sliced in 3 mm thickness and then examined using synchrotron X-rays from the 7B2 beamline of the Pohang Light Source. Refraction-enhanced phase contrast radiography and microtomography were adopted to identify dark core and dim edge of Lewy bodies in neurons. The morphology of Lewy bodies was clearly revealed by the phase contrast radiography in very thick (3 mm) midbrain tissues without any staining treatment. Three-dimensional volume rendered microtomography of the autopsied midbrain tissues demonstrates striking evidence that several Lewy bodies are agglomerated by dim edges in a neuron. We suggest that the phase contrast radiography could be a useful tool to morphologically investigate the causes or the processes in PD.
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Affiliation(s)
- S B Koh
- Department of Neurology, Korea University College of Medicine, Korea.
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Lee SR, Kim AR, Kim JS, Kim J, Lee JY, Lee YL, Choe M, Park JB. The proteins of synaptic vesicle membranes are affected during ageing of rat brain. Exp Mol Med 2001; 33:220-5. [PMID: 11795483 DOI: 10.1038/emm.2001.36] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Low molecular weight GTP-binding proteins are molecular switches that are believed to play pivotal roles in cell growth, differentiation, cytoskeletal organization, and vesicular trafficking. Rab proteins are key players in the regulation of vesicular transport, while Rho family members control actin-dependent cell functions, i.e. the regulation of cytoskeletal organization in response to extracelluar growth factors and in dendritic neuron development. In this study, we have examined the regulation of small GTP-binding proteins that are implicated in neurosecretion and differentiation of neuron during ageing processes. Comparison of small GTP-binding proteins from the synaptosome and crude synaptic vesicles (LP2 membranes) of 2 months and 20 months old rat brain respectively showed no difference in the level of Rab family proteins (Rab3A and Rab5A). However, Rho family proteins such as RhoA and Cdc42 were elevated in LP2 membranes of the aged brain. The dissociation of Rab3A by Ca2+/calmodulin (CaM) from SV membranes was not changed during aging. Ca2+/CaM stimulated phosphorylation of the 22 and 55-kDa proteins in SV membranes from the aged rat brain, and inhibited phosporylation of 30-kDa proteins. GTPgammaS inhibited phosphorylation of the 100-kDa proteins and stimulated phosphorylation of the 70 kDa in LP2 membranes from both the young and aged rat brains, whereas GDPbetaS caused just the opposite reaction. These results suggest that protein phosphorylation and regulation of Rho family GTPases in rat brain appears to be altered during ageing processes.
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Affiliation(s)
- S R Lee
- Department of Biochemistry, College of Medicine, Hallym University, Chunchon, Kangwon-Do, Korea
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31
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Abstract
Chromatin structure was examined at the 3'-boundary region of the human beta-globin locus control region hypersensitive site-2 (LCR HS-2) using several footprinting agents. Erythroid K562 cells (possessing HS-2) were damaged by the footprinting agents: hedamycin, bleomycin and four nitrogen mustard analogues. Purified DNA and non-erythroid HeLa cells (lacking HS-2) were also damaged as controls for comparison with K562 cells. The comparison between intact cells and purified DNA showed several protected regions in K562 cells. A large erythroid-specific protected region of 135 bp was found at the boundary of HS-2. The length of this protected region (135 bp) was close to that of DNA contained in a nucleosome core (146 bp). Another two protected regions were found upstream of the protected region. A 16-bp erythroid-specific footprint co-localised with a GATA-1 motif-this indicated that the GATA-1 protein could be involved in positioning the nucleosome. Further upstream, a 100-bp footprint coincided with an AT-rich region. Thus our footprinting results suggest that the 3'-boundary of LCR HS-2 is flanked by a positioned nucleosome and that an erythroid-specific protein binds to the sequence adjacent to the nucleosome and acts to position the nucleosome at the boundary of the hypersensitive site.
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Affiliation(s)
- A R Kim
- School of Biochemistry and Molecular Genetics, University of New South Wales, Sydney, NSW 2052, Australia
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Kwon OS, Lee HS, Koh DW, Cho YJ, Park YH, Park DK, Oh YL, Seo JH, Chun HJ, Um SH, Lee SW, Choi JH, Kim CD, Ryu HS, Hyun JH, Kim AR, Kim YS. A case of primary adenosquamous carcinoma of the liver presented with liver abscess. Korean J Intern Med 2001; 16:270-3. [PMID: 11855159 PMCID: PMC4578056 DOI: 10.3904/kjim.2001.16.4.270] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Primary adenosquamous carcinoma of the liver is a very rare type of cholangiocarcinoma and is defined as a cancer containing both squamous and adenomatous components in the same lesion. Recently, we experienced a primary adenosquamous carcinoma of the liver presented as liver abscess. A 63-year-old man was presented with a 4-day history of fever and chill. The radiologic study showed a 4 cm-sized, central hypoattenuated mass with peripheral rim enhancement in the left lobe of the liver. Ultrasonography-guided aspiration and biopsy suggested an adenocarcinoma with abscess in the liver. At laparotomy, the tumor occupied the left lobe of the liver and invaded the right diaphragm. An extended left lobectomy and a partial excision of the involved diaphragm were done. Grossly, the tumor was 6 x 5 x 5 cm in size and had an eccentric necrosis. Microscopically, the tumor was composed of adenocarcinoma and squamous cell carcinoma with a transitional area.
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Affiliation(s)
- O S Kwon
- Department of Internal Medicine, Korea University, Ansan Hospital, 516 Kojan-Dong, Ansan City, Kyungki-Do, 425-020, Korea
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33
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Abstract
Syringin was found to possess immunomodulatory activity by which it inhibited the in-vitro immunohaemolysis of antibody-coated sheep erythrocytes by guinea-pig serum through suppression of C3-convertase of the classical complement. In this study, we examined its in-vitro and in-vivo activity on tumour necrosis factor (TNF)-alpha and nitric oxide (NO) production, CD4+ T cell and CD8+ cytotoxic T cell (CTLL-2) proliferation, and croton oil-, arachidonic acid- and fluorescein-isothiocynate (FITC)-induced mouse ear oedema model. Syringin significantly inhibited both TNF-alpha production from lipopolysaccharide (LPS)-stimulated RAW264.7 cells and CD8+ T cell (CTLL-2) proliferation in a dose-dependent manner, whereas neither NO production nor CD4+ T cell proliferation were blocked even by high concentrations of syringin. In the invivo experiments, syringin also significantly suppressed FITC-induced ear oedema in mice but not the ear oedema induced by croton or arachidonic acid. These results suggest that syringin may be implicated as an immunomodulator having an anti-allergic effect rather than an anti-inflammatory effect. The anti-allergic effect of syringin seems to be due, in part, to inhibition of TNF-alpha production and cytotoxic T cell proliferation.
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Affiliation(s)
- J Y Cho
- R & D Center, Daewoong Pharmaceutical Co. Ltd., Korea.
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Abstract
A 22-year-old male presented with a 1-year history of nasal obstruction due to a polypoid mass in the right nasal cavity. Histopathologic examination revealed the tumor to consist of a mixture of a trabecular structure with a double-layered arrangement of inner dark cells and outer clear cells. Immunohistochemical examination showed the clear cells to be positive for alpha-smooth muscle actin and S-100 protein. Ultrastructural examination confirmed the myoepithelial cell origin. The tumor was excised and no recurrence or metastasis was found 40 months after surgery. We describe here a rare case of epithelial-myoepithelial carcinoma arising from the nasal cavity, one of the most unusual locations.
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Affiliation(s)
- H M Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, Korea University College of Medicine, Seoul.
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Abstract
Coptis japonica Makino (Ranunculaceae) is known to possess several biological activities such as anti-inflammatory effects. In this study, five lignans, isolariciresinol (1), lariciresinol glycoside (2), pinoresinol (3), pinoresinol glycoside (4) and syringaresinol glycoside (5), isolated from the rhizomes of C. japonica were tested to evaluate their in vitro anti-inflammatory effects. Pinoresinol and isolariciresinol showed higher inhibitory effects on TNF-alpha production, whereas syringaresinol glycoside strongly suppressed lymphocyte proliferation. The results indicate that the lignans may differentially modulate inflammatory cell responses, suggesting that these compounds may participate in anti-inflammatory processes by C. japonica.
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Affiliation(s)
- J Y Cho
- Department of Immunopharmacology, R & D Center, Daewoong Pharmaceutical Co. Ltd., Sungnam, Korea.
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Abstract
UNLABELLED Nonocclusive mesenteric ischemia (NOMI) is known to occupy about 25% to 60% of intestinal infarction. NOMI has been reported to be responsible for 9% of the deaths in the dialysis population and the postulated causes of NOMI include intradialytic hypotension, atherosclerosis and medications, such as diuretics, digitalis and vasopressors. Clinical manifestations, such as fever, diarrhea and leukocytosis, are nonspecific, which makes early diagnosis of NOMI very difficult. CASE A 66-year-old woman on maintenance hemodialysis for 5 years was admitted with syncope, abdominal pain and chilly sensation. Since 7 days prior to admission, blood pressure on the supine position during hemodialysis had frequently fallen to 80/50 mmHg. Four days later, she complained of progressive abdominal pain. Rebound tenderness and leukocytosis (WBC 13900/mm3) with left shift were noted. Stool examination was positive for occult blood. Abdominal CT scan showed a distended gall bladder with sludge. Under the impression of acalculous cholecystitis, she was operated on. Surgical and pathologic findings of colon colon were compatible with NOMI. Because of recurrent intradialytic hypotension, we started midodrine 2.5 mg just before hemodialysis and increased the dose up to 7.5 mg. After midodrine therapy, blood pressure during dialysis became stable and the symptoms associated with hypotension did not recur. CONCLUSION As NOMI may occur within several hours or days after an intradialytic hypotensive episode, abdominal pain should be carefully observed and NOMI should be considered as a differential diagnosis. In addition, we suggest that midodrine be considered to prevent intradialytic hypotensive episodes.
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Affiliation(s)
- S Y Han
- Department of Internal Medicine, College of Medicine, Korea University, Seoul, Korea
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Cho JY, Kim AR, Yoo ES, Baik KU, Park MH. Immunomodulatory effect of arctigenin, a lignan compound, on tumour necrosis factor-alpha and nitric oxide production, and lymphocyte proliferation. J Pharm Pharmacol 1999; 51:1267-73. [PMID: 10632084 DOI: 10.1211/0022357991777001] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
We have investigated the immunomodulatory effects of arctigenin, a dibenzyl butyrolactone lignan compound, on tumour necrosis factor (TNF)-alpha and nitric oxide (NO) production, and lymphocyte proliferation. Arctigenin inhibited strongly TNF-alpha production by lipopolysaccharide-stimulated murine macrophage RAW264.7 and differentiated human macrophage U937 with IC50 values of 5.0 and 3.9 microM, respectively, without displaying cytotoxicity. The TNF-alpha inhibitory effect of arctigenin in lipopolysaccharide-triggered RAW264.7 cells was increased by co-treatment with several known TNF-alpha inhibitors. It also potently attenuated T and B cell proliferation stimulated by concanavalin A and lipopolysaccharide in a dose-dependent manner with IC50 values of 2.9 and 14.6 microM, respectively. In contrast, the compound showed a different pattern in lipopolysaccharide- and interferon (IFN)-gamma-induced NO production from RAW264.7 cells. Arctigenin inhibited NO release by IFN-gamma signal, whereas it significantly enhanced lipopolysaccharide-triggered NO production in RAW264.7 cells. The results suggested that arctigenin may regulate immune responses in activated macrophages and lymphocytes including TNF-alpha and NO production and lymphocyte proliferation.
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Affiliation(s)
- J Y Cho
- Department of Immunopharmacology, R & D Center, Daewoong Pharmaceutical Co. Ltd, Sungnam, Korea.
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38
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Affiliation(s)
- M Kletzel
- Division of Oncology and Hematology and Bone Marrow Transplantation, Children's Memorial Hospital, Chicago, IL, USA
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Abstract
Recently several reports have described the usefulness of meperidine as the sole agent for spinal anesthesia. In this study, meperidine 50mg mixed with 10% dextrose 0.5ml was used for the spinal anesthetic agent for Cesarean section in 182 cases. The subarachnoid injection of meperidine resulted in anesthesia similar to that noted with the intrathecal administration of local anesthetics. Sensory and motor blockades in all patients with meperidine spinal anesthesia were obtained. Prolonged analgesic effect (453.7 +/- 158.1 minutes) and rapid motor recovery (75.9 +/- 17.2 minutes) were obtained. Side effects included nausea (49 patients), hypotension (95 patients) and pruritus (30 patients). Hypotension was easily treated with rapid hydration and ephedrine. Eighteen patients complained of mild pain during the last period of operation. At birth, all newborns cried immediately and the mean Apgar scores were 9.8 +/- 0.4 at one minute and 10 at 5 minutes. It is concluded that meperidine, which has advantages such as rapid motor recovery, prolonged postoperative analgesia, and mild complications which may be easily treated, can serve as a good alternative agent for spinal anesthesia for Cesarean section.
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Affiliation(s)
- J K Cheun
- Department of Anesthesiology, College of Medicine, Keimyung University, Taegu, Korea
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Cheun JK, Kim AR. Effects of meperidine, pentazocine, bupivacaine and lidocaine in spinal anesthesia for cesarean section. J Anesth 1988; 2:242-6. [PMID: 15236086 DOI: 10.1007/s0054080020242] [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] [Received: 12/01/1988] [Accepted: 06/11/1988] [Indexed: 10/26/2022]
Affiliation(s)
- J K Cheun
- Department of anesthesiology, Keimyung University School of Medicine, Dong San Medical Center, Korea
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