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Taneja TK, Ma D, Kim BY, Welling PA. Golgin-97 Targets Ectopically Expressed Inward Rectifying Potassium Channel, Kir2.1, to the trans-Golgi Network in COS-7 Cells. Front Physiol 2018; 9:1070. [PMID: 30123141 PMCID: PMC6085455 DOI: 10.3389/fphys.2018.01070] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [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: 02/12/2018] [Accepted: 07/17/2018] [Indexed: 12/27/2022] Open
Abstract
The inward rectifying potassium channel, Kir2.1, is selected as cargo at the trans-Golgi network (TGN) for export to the cell surface through a unique signal-dependent interaction with the AP1 clathrin-adaptor, but it is unknown how the channel is targeted at earlier stages in the secretory pathway for traffic to the TGN. Here we explore a mechanism. A systematic screen of Golgi tethers identified Golgin-97 as a Kir2.1 binding partner. In vitro protein-interaction studies revealed the interaction is direct, occurring between the GRIP domain of Golgin-97 and the cytoplasmic domain of Kir2.1. Imaging and interaction studies in COS-7 cells suggest that Golgi-97 binds to the channel en route through the Golgi. RNA interference-mediated knockdown of Golgin-97 prevented exit of Kir2.1 from the Golgi. These observations identify Golgin-97 as a Kir2.1 binding partner that is required for targeting the channel to the TGN. Based on our studies in COS-7 cells, we propose Golgi-97 facilitates formation of AP1-dependent export carriers for Kir2.1 by coupling anterograde delivery of Kir2.1 with retrograde recycling of AP-1 containing endosomes to the TGN.
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Affiliation(s)
- Tarvinder K Taneja
- Department of Physiology, Maryland Center for Kidney Discovery, School of Medicine, University of Maryland, Baltimore, Baltimore, MD, United States
| | - Donghui Ma
- Department of Physiology, Maryland Center for Kidney Discovery, School of Medicine, University of Maryland, Baltimore, Baltimore, MD, United States
| | - Bo Y Kim
- Department of Physiology, Maryland Center for Kidney Discovery, School of Medicine, University of Maryland, Baltimore, Baltimore, MD, United States
| | - Paul A Welling
- Department of Physiology, Maryland Center for Kidney Discovery, School of Medicine, University of Maryland, Baltimore, Baltimore, MD, United States
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2
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Kim Yu J, Lim HS, Kim BY, Seo CS, Jeong SJ. Quantitative analysis and biological efficacies regarding the neuroprotective and antineuroinflammatory actions of the herbal formula SCD-B-033. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608421] [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)
- J Kim Yu
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Daejeon, Korea, Republic of (South)
- College of Pharmacy, Chungnam National University, Daejeon, Korea, Republic of (South)
| | - HS Lim
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Daejeon, Korea, Republic of (South)
| | - BY Kim
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Daejeon, Korea, Republic of (South)
| | - CS Seo
- K-herb Research Center, Korea Institute of Oriental Medicine, Daejeon, Korea, Republic of (South)
| | - SJ Jeong
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Daejeon, Korea, Republic of (South)
- Korean Medicine Life Science, University of Science & Technology, Daejeon, Korea, Republic of (South)
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3
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Baek CH, Kim BY, Park WR, Lee GJ, Woo SH, Ryu JS, Chung MK. Modification of facial artery myomucosal flap: a novel perforator flap for upper aerodigestive tract reconstruction after head and neck cancer ablation. Clin Otolaryngol 2016; 42:880-885. [PMID: 27545296 DOI: 10.1111/coa.12744] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/19/2016] [Indexed: 11/28/2022]
Affiliation(s)
- C H Baek
- Department of Otorhinolaryngology-Head and Neck Surgery, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Korea.,Department of Medical Device Management and Research, SAIHST, Sungkyunkwan University, Seoul, Korea
| | - B Y Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Korea
| | - W R Park
- Department of Otorhinolaryngology-Head and Neck Surgery, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Korea
| | - G J Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Korea
| | - S H Woo
- Department of Otorhinolaryngology-Head and Neck Surgery, Gyeongsang National University, Jinju, Korea
| | - J S Ryu
- Head and Neck Oncology Clinic, National Cancer Center, Ilsan, South Korea
| | - M K Chung
- Department of Otorhinolaryngology-Head and Neck Surgery, Sungkyunkwan University School of Medicine, Samsung Medical Center, Seoul, Korea
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Seo JJ, Kim BY, Kim BS, Jeong JK, Ok JM, Kim JS, Denlinger JD, Mo SK, Kim C, Kim YK. Superconductivity below 20 K in heavily electron-doped surface layer of FeSe bulk crystal. Nat Commun 2016; 7:11116. [PMID: 27050161 PMCID: PMC4823826 DOI: 10.1038/ncomms11116] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Accepted: 02/23/2016] [Indexed: 11/30/2022] Open
Abstract
A superconducting transition temperature (Tc) as high as 100 K was recently discovered in one monolayer FeSe grown on SrTiO3. The discovery ignited efforts to identify the mechanism for the markedly enhanced Tc from its bulk value of 8 K. There are two main views about the origin of the Tc enhancement: interfacial effects and/or excess electrons with strong electron correlation. Here, we report the observation of superconductivity below 20 K in surface electron-doped bulk FeSe. The doped surface layer possesses all the key spectroscopic aspects of the monolayer FeSe on SrTiO3. Without interfacial effects, the surface layer state has a moderate Tc of 20 K with a smaller gap opening of 4.2 meV. Our results show that excess electrons with strong correlation cannot induce the maximum Tc, which in turn reveals the need for interfacial effects to achieve the highest Tc in one monolayer FeSe on SrTiO3. Thin FeSe film on SrTiO3 substrate becomes a superconductor with a transition temperature over 100 K, yet the origin remains controversial. Here, Seo et al. show superconductivity below 20 K on the electron-doped surface of an FeSe crystal, suggesting a decisive role of interfacial effects in the enhancement of superconductivity.
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Affiliation(s)
- J J Seo
- Institute of Physics and Applied Physics, Yonsei University, Seoul 120-749, Korea.,Center for Correlated Electron Systems, Institute for Basic Science, Seoul 151-742, South Korea
| | - B Y Kim
- Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea.,Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - B S Kim
- Center for Correlated Electron Systems, Institute for Basic Science, Seoul 151-742, South Korea.,Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea
| | - J K Jeong
- Institute of Physics and Applied Physics, Yonsei University, Seoul 120-749, Korea
| | - J M Ok
- Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea
| | - Jun Sung Kim
- Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea
| | - J D Denlinger
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - S-K Mo
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - C Kim
- Center for Correlated Electron Systems, Institute for Basic Science, Seoul 151-742, South Korea.,Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea
| | - Y K Kim
- Center for Correlated Electron Systems, Institute for Basic Science, Seoul 151-742, South Korea.,Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.,Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea
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Abstract
BACKGROUND Berberine (Ber), used widely as an antibacterial, antifungal, and anti-inflammatory drug, has long been used as a gastrointestinal remedy in Chinese traditional medicine. Recent reports have suggested that Ber suppresses Th17 responses that was mediated by direct actions on T cells and thymic stromal lymphopoietin production in primary mast cells. It has been suggested that Ber may be useful in treating allergic response. The purpose of this study was to assess the effects of Ber treatment on allergic inflammation in an allergic rhinitis mouse model and to examine the underlying mechanism(s). METHODS BALB/c mice were divided into control, Derf with no treated (Derf), Ber treated, and Ber with anti-C25 monoclonal antibody treated (Ber + anti-CD25) groups. All mice, with the exception of the control group, were sensitized with an intraperitoneal i.p. injection of Dermatophagoides farinae (Derf). Mice in the Ber and Ber + anti-CD25 group were treated intranasally with 10 #181;g/mL. Then, 1 week after sensitization, all mice were challenged intranasally with 20 #181;g Derf for 5 consecutive days. Mice in the anti-CD25 group were treated intraperitoneally with 250 #181;g anti-CD25 monoclonal antibody 1 day before the first intra-nasal challenge with Derf. Allergic symptom scores, eosinophil counts, and serum Derf-specific IgE levels were measured. T-bet, GATA-3, interferon-g (IFN-γ), interleukin (IL)-10, IL-13, and Foxp3 expression was examined by real-time polymerase chain reaction and Western blotting. CD4⁺ CD25⁺ Foxp3⁺ T cells were assessed by flow cytometry. RESULTS Symptom scores, serum Derf-specific IgE levels, GATA-3 mRNA levels, T-bet mRNA levels, and tissue eosinophil counts were decreased in the Ber versus the Derf group. In the Ber + anti-CD25 group, serum IL-10 levels were decreased versus the control, Derf, and Ber groups. In the Ber + anti-CD25 mAb groups, Foxp3 mRNA levels were decreased versus the control group. In the Ber group, Foxp3 mRNA levels were increased versus the control group. In the Ber group, the percentage of CD4⁺ CD25⁺ Foxp3⁺ T cells was increased versus the Derf group. The percentage of CD4⁺ CD25⁺ Foxp3+ T cells was increased in the Ber versus the Derf groups. CONCLUSIONS In our study, Ber reduced allergic inflammation significantly. Moreover, our findings suggest that the mechanism of action of Ber may be via CD4⁺ CD25⁺ Foxp3⁺ Treg cells, possibly through not only by increasing their numbers but also altering their function.
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Abstract
Agastachis Herba is one of the well-known medicinal herbs in Korean traditional medicine. This study was taken up to examine the beneficial effects of Agastachis Herba on a mice model of asthma. BALB/c mice were sensitized and challenged with ovalbumin to produce a murine model of asthma. Methanol extracts of Agastachis Herba were orally administered to the ovalbumin-induced asthmatic mice. The effects of methanol extract of Agastachis Herba on airway hyper responsiveness, immune cell distributions in bronchoalveolar lavage fluid, ovalbumin-specific immunoglobulin E in serum, and histopathological changes were evaluated. Mice treated with the methanol extract of Agastachis Herba showed reduction of airway hyper responsiveness as well as inhibited immune cell infiltration in bronchoalveolar region. Also ovalbumin-specific immunoglobulin E levels in bronchoalveolar lavage fluid significantly decreased in extract treated mice. Histopathological findings showed significant beneficial changes in inflammatory cell infiltration.
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Affiliation(s)
- C Y Lim
- College of Medicine, Dongguk University, Ilsan, Gyounggi-do, Korea
| | - B Y Kim
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Daejeon, Korea
| | - S H Lim
- School of Public Health, Far East University, Chungbuk, Korea
| | - S I Cho
- School of Korean Medicine, Pusan National University, Yangsan, Korea
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Park JE, Kim TS, Meng L, Bang JK, Kim BY, Lee KS. Putting a bit into the polo-box domain of polo-like kinase 1. J Anal Sci Technol 2015; 6:27. [PMID: 26500787 PMCID: PMC4610673 DOI: 10.1186/s40543-015-0069-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Accepted: 09/27/2015] [Indexed: 01/11/2023] Open
Abstract
Polo-like kinase 1 (Plk1) plays key roles in regulating various mitotic processes that are critical for cellular proliferation. A growing body of evidence suggests that Plk1 overexpression is tightly associated with the development of human cancers. Interestingly, various types of cancer cells are shown to be addicted to a high level of Plk1, and the reversal of Plk1 addiction appears to be an effective strategy for selectively killing cancer cells, but not normal cells. Therefore, Plk1 is considered an attractive anticancer drug target. Over the years, a large number of inhibitors that target the catalytic activity of Plk1 have been developed. However, these inhibitors exhibit significant levels of cross-reactivity with related kinases, including Plk2 and Plk3. Consequently, as an alternative approach for developing anti-Plk1 therapeutics, substantial effort is under way to develop inhibitors that target the C-terminal protein–protein interaction domain of Plk1, called the polo-box domain (PBD). In this communication, I will discuss the pros and cons of targeting the PBD in comparison to those of targeting the ATP-binding site within the kinase domain.
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Affiliation(s)
- Jung-Eun Park
- Laboratory of Metabolism, Center for Cancer Research, National Cancer Institute, National Institutes of Health, 9000 Rockville Pike, Building 37, Room 3118, Bethesda, MD 20892 USA
| | - Tae-Sung Kim
- Laboratory of Metabolism, Center for Cancer Research, National Cancer Institute, National Institutes of Health, 9000 Rockville Pike, Building 37, Room 3118, Bethesda, MD 20892 USA
| | - Lingjun Meng
- Laboratory of Metabolism, Center for Cancer Research, National Cancer Institute, National Institutes of Health, 9000 Rockville Pike, Building 37, Room 3118, Bethesda, MD 20892 USA
| | - Jeong K Bang
- Division of Magnetic Resonance, Korea Basic Science Institute, 804-1, Yangcheong Ri, Ochang, 363-883 Chungbuk Republic of Korea
| | - Bo Y Kim
- World Class Institute, Korea Research Institute of Bioscience and Biotechnology, Ochang, 363-883 Republic of Korea
| | - Kyung S Lee
- Laboratory of Metabolism, Center for Cancer Research, National Cancer Institute, National Institutes of Health, 9000 Rockville Pike, Building 37, Room 3118, Bethesda, MD 20892 USA
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Thimmegowda NR, Park C, Shwetha B, Sakchaisri K, Liu K, Hwang J, Lee S, Jeong SJ, Soung NK, Jang JH, Ryoo IJ, Ahn JS, Erikson RL, Kim BY. Synthesis and Antitumor Activity of Natural Compound Aloe Emodin Derivatives. Chem Biol Drug Des 2014; 85:638-44. [DOI: 10.1111/cbdd.12448] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 09/01/2014] [Accepted: 10/07/2014] [Indexed: 11/26/2022]
Affiliation(s)
- Naraganahalli R. Thimmegowda
- World Class Institute (WCI); Incurable Diseases Research Center; Korea Research Institute of Bioscience and Biotechnology (KRIBB); Ochang, Cheongwon 363-883 Korea
- Department of Chemistry; Govt.S K S J T Institute; Bangalore Karnataka 560001 India
| | - Chanmi Park
- World Class Institute (WCI); Incurable Diseases Research Center; Korea Research Institute of Bioscience and Biotechnology (KRIBB); Ochang, Cheongwon 363-883 Korea
| | - Bettaswamigowda Shwetha
- World Class Institute (WCI); Incurable Diseases Research Center; Korea Research Institute of Bioscience and Biotechnology (KRIBB); Ochang, Cheongwon 363-883 Korea
| | - Krisada Sakchaisri
- World Class Institute (WCI); Incurable Diseases Research Center; Korea Research Institute of Bioscience and Biotechnology (KRIBB); Ochang, Cheongwon 363-883 Korea
| | - Kangdong Liu
- World Class Institute (WCI); Incurable Diseases Research Center; Korea Research Institute of Bioscience and Biotechnology (KRIBB); Ochang, Cheongwon 363-883 Korea
- Basic Medical College; Zhengzhou University; ZhengZhou 450001 China
| | - Joonsung Hwang
- World Class Institute (WCI); Incurable Diseases Research Center; Korea Research Institute of Bioscience and Biotechnology (KRIBB); Ochang, Cheongwon 363-883 Korea
| | - Sangku Lee
- World Class Institute (WCI); Incurable Diseases Research Center; Korea Research Institute of Bioscience and Biotechnology (KRIBB); Ochang, Cheongwon 363-883 Korea
| | - Sook J. Jeong
- World Class Institute (WCI); Incurable Diseases Research Center; Korea Research Institute of Bioscience and Biotechnology (KRIBB); Ochang, Cheongwon 363-883 Korea
| | - Nak K. Soung
- World Class Institute (WCI); Incurable Diseases Research Center; Korea Research Institute of Bioscience and Biotechnology (KRIBB); Ochang, Cheongwon 363-883 Korea
| | - Jae H. Jang
- Chemical Biology Research Center; Korea Research Institute of Bioscience and Biotechnology (KRIBB); Ochang, Cheongwon 363-883 Korea
| | - In-Ja Ryoo
- Chemical Biology Research Center; Korea Research Institute of Bioscience and Biotechnology (KRIBB); Ochang, Cheongwon 363-883 Korea
| | - Jong S. Ahn
- Chemical Biology Research Center; Korea Research Institute of Bioscience and Biotechnology (KRIBB); Ochang, Cheongwon 363-883 Korea
| | - Raymond L. Erikson
- Department of Molecular and Cellular Biology; Harvard University; Cambridge MA 02138 USA
| | - Bo Y. Kim
- World Class Institute (WCI); Incurable Diseases Research Center; Korea Research Institute of Bioscience and Biotechnology (KRIBB); Ochang, Cheongwon 363-883 Korea
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Zhang S, Jung JH, Kim HS, Kim BY, Kim IH. Influences of phytoncide supplementation on growth performance, nutrient digestibility, blood profiles, diarrhea scores and fecal microflora shedding in weaning pigs. Asian-Australas J Anim Sci 2014; 25:1309-15. [PMID: 25049695 PMCID: PMC4092941 DOI: 10.5713/ajas.2012.12170] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Revised: 06/03/2012] [Accepted: 05/29/2012] [Indexed: 11/27/2022]
Abstract
A total of 140 weaning pigs ((Landrace×Yorkshire)×Duroc, BW = 6.47±0.86 kg) were used in a 5-wk growth trail to determine the effects of phytoncide supplementation on growth performance, nutrient apparent total tract digestibility (ATTD), blood profiles, diarrhea scores and fecal microflora shedding. Pigs were assigned randomly by BW into 5 treatments, dietary treatments were: i) NC, basal diet; ii) PC, NC+0.05% tylosin; iii) EO, NC+0.1% essential oil; iv) PP, NC+0.2% PP (phytoncide with 2% citric acid), and v) PA, NC+0.2% PA (phytoncide). Each treatment had 7 replicate pens with 4 pigs per pen. All pigs were housed in pens with a self-feeder and nipple drinker to allow ad libitum access to feed and water throughout the experimental period. During 0 to 2 wks, supplementation with essential oil and PA decreased (p<0.05) G/F compared with the other treatments. During 2 to 5 wks, supplementation with PA led to a higher (p<0.05) G/F than the other treatments. At 2 wk, ATTD of dry matter (DM) and gross energy (GE) in EO treatment were decreased (p<0.05) compared with NC treatment. Dietary PC treatment improved (p<0.05) ATTD of DM and E compared with the CON group, and PA and PP treatments showed a higher (p<0.05) ATTD of E than that in NC treatment. Pigs fed phytoncide (PA and PP) had a greater (p<0.05) ATTD of DM than those of NC and EO treatments at 5 wk. Moreover, supplementation with phytoncide elevated (p<0.05) the concentration of immunoglobulin (IgG) in blood at 2 wk. The inclusion of EO, PP and PA treatments showed a greater (p<0.05) amount of fecal Lactobacillus compared with CON group. However, no difference (p>0.05) was observed in diarrhea scores among treatments. In conclusion, phytoncide can elevate feed efficiency, nutrient digestibility, and improve the fecal Lactobacillus counts in weaning pigs. Our results indicated that the phytoncide could be used as a good antibiotics alternative in weaning pigs.
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Affiliation(s)
- S Zhang
- Phylus Co. Ltd., Chungbuk, Korea
| | - J H Jung
- Phylus Co. Ltd., Chungbuk, Korea
| | - H S Kim
- Phylus Co. Ltd., Chungbuk, Korea
| | - B Y Kim
- Phylus Co. Ltd., Chungbuk, Korea
| | - I H Kim
- Phylus Co. Ltd., Chungbuk, Korea
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Kim MJ, Kim BY, Lee DC, Choi J, Hwang SH, Park CS, Kim SW, Kim SW, Cho JH, Park YJ. A modified uvulopalatal flap with lateral pharyngoplasty for treatment in 92 adults with obstructive sleep apnoea syndrome. Clin Otolaryngol 2014; 38:415-9. [PMID: 23731664 DOI: 10.1111/coa.12134] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/16/2013] [Indexed: 11/30/2022]
Affiliation(s)
- M J Kim
- Department of Otolaryngology-Head and Neck Surgery, The Catholic University of Korea, College of Medicine, Seoul, Korea
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Kim BY, Choi JW, Park KC, Youn SW. Sebum, acne, skin elasticity, and gender difference - which is the major influencing factor for facial pores? Skin Res Technol 2011; 19:e45-53. [DOI: 10.1111/j.1600-0846.2011.00605.x] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/20/2011] [Indexed: 11/26/2022]
Affiliation(s)
- BY Kim
- Department of Dermatology; Seoul National University College of Medicine; Seoul; Korea
| | - JW Choi
- Department of Dermatology; Seoul National University College of Medicine; Seoul; Korea
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12
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Kang YH, Park CH, Kim TS, Soung NK, Bang JK, Kim BY, Park JE, Lee KS. Mammalian polo-like kinase 1-dependent regulation of the PBIP1-CENP-Q complex at kinetochores. J Biol Chem 2011; 286:19744-57. [PMID: 21454580 PMCID: PMC3103353 DOI: 10.1074/jbc.m111.224105] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [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: 01/24/2011] [Revised: 03/29/2011] [Indexed: 11/06/2022] Open
Abstract
Mammalian polo-like kinase 1 (Plk1) plays a pivotal role during M-phase progression. Plk1 localizes to specific subcellular structures through the targeting activity of the C-terminal polo-box domain (PBD). Disruption of the PBD function results in improper bipolar spindle formation, chromosome missegregation, and cytokinesis defect that ultimately lead to the generation of aneuploidy. It has been shown that Plk1 recruits itself to centromeres by phosphorylating and binding to a centromere scaffold, PBIP1 (also called MLF1IP and CENP-U[50]) through its PBD. However, how PBIP1 itself is targeted to centromeres and what roles it plays in the regulation of Plk1-dependent mitotic events remain unknown. Here, we demonstrated that PBIP1 directly interacts with CENP-Q, and this interaction was mutually required not only for their stability but also for their centromere localization. Plk1 did not appear to interact with CENP-Q directly. However, Plk1 formed a ternary complex with PBIP1 and CENP-Q through a self-generated p-T78 motif on PBIP1. This complex formation was central for Plk1-dependent phosphorylation of PBIP1-bound CENP-Q and delocalization of the PBIP1-CENP-Q complex from mitotic centromeres. This study reveals a unique mechanism of how PBIP1 mediates Plk1-dependent phosphorylation event onto a third protein, and provides new insights into the mechanism of how Plk1 and its recruitment scaffold, PBIP1-CENP-Q complex, are localized to and delocalized from centromeres.
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Affiliation(s)
- Young H. Kang
- From the Laboratory of Metabolism, Center for Cancer Research, NCI National Institutes of Health, Bethesda, Maryland 20892
| | - Chi Hoon Park
- From the Laboratory of Metabolism, Center for Cancer Research, NCI National Institutes of Health, Bethesda, Maryland 20892
| | - Tae-Sung Kim
- From the Laboratory of Metabolism, Center for Cancer Research, NCI National Institutes of Health, Bethesda, Maryland 20892
| | - Nak-Kyun Soung
- From the Laboratory of Metabolism, Center for Cancer Research, NCI National Institutes of Health, Bethesda, Maryland 20892
- the Chemical Biology Research Center, Korea Research Institute of Bioscience and Biotechnology, Ochang, Chung-Buk 363-883, South Korea
| | - Jeong K. Bang
- the Division of Magnetic Resonance, Korean Basic Science Institute, Ochang, Chung-Buk 363-883, South Korea, and
| | - Bo Y. Kim
- the Chemical Biology Research Center, Korea Research Institute of Bioscience and Biotechnology, Ochang, Chung-Buk 363-883, South Korea
| | - Jung-Eun Park
- From the Laboratory of Metabolism, Center for Cancer Research, NCI National Institutes of Health, Bethesda, Maryland 20892
| | - Kyung S. Lee
- From the Laboratory of Metabolism, Center for Cancer Research, NCI National Institutes of Health, Bethesda, Maryland 20892
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13
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Kim JH, Kim BY, Choi JW, Kim SO, Lee HS, Park KC, Youn SW. The objective evaluation of the severity of psoriatic scales with desquamation collecting tapes and image analysis. Skin Res Technol 2011; 18:143-50. [PMID: 21507073 DOI: 10.1111/j.1600-0846.2011.00545.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND Assessment of psoriatic scales is important to determine the severity of psoriasis. However, there are very limited numbers of objective, quantitative and observer-independent tools for measuring the severity of psoriasis. OBJECTIVE To determine whether the bioengineering parameters of the psoriatic scale can be used to assess the severity of psoriasis instead of the psoriatic severity index of scales (PSIs) score. METHODS Thirty-four patients with psoriasis were included. A representative lesion from each patient was selected and bioengineering parameters were measured using the Corneofix(®). Simultaneously, the severity of the scales was assessed by the PSIs score using clinical photographs of the lesions. In addition, skin color and elasticity parameters were also measured using the Colorimeter(®), the Mexameter(®) and the Cutometer(®). RESULTS Statistical differences in the scale parameters were observed between the PSIs 2 and 3 scores. Among the scale parameters, the percent area and area in μm(2) were negatively correlated with the PSIs score. In addition, the Colorimeter(®) a, b parameters and the Cutometer(®) R9 parameters were significantly correlated with the PSIs score. CONCLUSIONS The results of this study showed that the severity of psoriatic scales could be measured objectively using the Corneofix(®).
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Affiliation(s)
- J H Kim
- Department of Dermatology, Seoul National University College of Medicine, Seoul, Korea
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Choi CW, Lee DH, Kim HS, Kim BY, Park KC, Youn SW. The clinical features of late onset acne compared with early onset acne in women. J Eur Acad Dermatol Venereol 2011; 25:454-61. [DOI: 10.1111/j.1468-3083.2010.03813.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Kang JH, Choi NK, Kang SJ, Yang SY, Ko HM, Jung JY, Kim MS, Koh JT, Kim WJ, Oh WM, Kim BY, Kim SH. Alendronate affects cartilage resorption by regulating vascular endothelial growth factor expression in rats. Anat Rec (Hoboken) 2010; 293:786-93. [PMID: 20432372 DOI: 10.1002/ar.21092] [Citation(s) in RCA: 8] [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: 11/11/2022]
Abstract
This study was performed to determine effects of alendronate on the tibial proximal epiphyseal cartilage undergoing endochondral ossification and the expression of vascular endothelial growth factor (VEGF) from the cartilage. Alendronate was injected subcutaneously every other day in postnatal Day 1 Sprague Dawley rats. The rats were sacrificed 3, 5, 7, and 10 days after the first injection. The effect of alendronate treatment for 10 days was demonstrated from the morphological change that the area of the secondary ossification center in the epiphysis was significantly smaller in the alendronate group than that in the control group (P < 0.05). Strong immunoreactivity to VEGF was observed in the hypertrophied chondrocytes and some proliferating chondrocytes in the epiphyseal cartilage at postnatal Day 5 and was decreased after the alendronate treatment for 5 days. Immunoreactivity was observed in not only hypertrophied cells but also the peripheral cartilaginous matrix adjacent to the vascular canals invading into the central portion of the cartilage at postnatal Day 7. This reactivity was also reduced considerably by the alendronate treatment for 7 days. The level of VEGF expression was reduced by the alendronate treatment at both the transcription and translation levels. However, the transcriptional level of the flt-1 and flk-1 receptors was relatively unaltered by the treatment. These results suggest that VEGF expression is required for vascular invasion into the developing cartilage and alendronate can affect its resorption by downregulating VEGF expression.
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Affiliation(s)
- J H Kang
- Dental Science Research Institute, Second Stage Brain Korea, School of Dentistry, Chonnam National University, Gwangju, South Korea
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Jin SP, Chang MS, Shin HS, Kim BY, Park HJ, Won CH, Cho SY. Eruptive pseudo-angiomatosis lesions are associated with intravascular neutrophils and do not harbour EpsteinâBarr virus. J Eur Acad Dermatol Venereol 2010; 24:163-7. [DOI: 10.1111/j.1468-3083.2009.03370.x] [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: 11/27/2022]
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Kim A, Kwon OS, Kim SO, He L, Bae EY, Lee MS, Jeong SJ, Shim JH, Yoon DY, Kim CH, Moon A, Kim KE, Ahn JS, Kim BY. Caspase-3 activation as a key factor for HBx-transformed cell death. Cell Prolif 2008; 41:755-74. [PMID: 18700866 DOI: 10.1111/j.1365-2184.2008.00550.x] [Citation(s) in RCA: 4] [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] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
OBJECTIVES Nuclear factor-kappa B (NF-kappaB) activation has been associated with the tumorigenic growth of hepatitis B virus X protein (HBx)-transformed cells. This study was aimed to find a key target for treatment of HBx-mediated cancers. MATERIALS AND METHODS NF-kappaB activation, endoplasmic reticulum-stress (ER-stress), caspase-3 activation, and cell proliferation were evaluated after Chang/HBx cells permanently expressing HBx viral protein were treated with inhibitors of NF-kappaB, proteasome and DNA topoisomerase. RESULTS Inhibition of NF-kappaB transcriptional activity by transient transfection with mutant plasmids encoding Akt1 and glycogen synthase kinase-3beta (GSK-3beta), or by treatment with chemical inhibitors, wortmannin and LY294002, showed little effect on the survival of Chang/HBx cells. Furthermore, IkappaBalpha (S32/36A) mutant plasmid or other NF-kappaB inhibitors, 1-pyrrolidinecarbonidithioic acid and sulphasalazine, were also shown to have little effect on the cell proliferation. By contrast, proteasome inhibitor-1 (Pro1) and MG132 enhanced the HBx-induced ER-stress response and the subsequent activation of caspase-12, -9 and -3 and reduced cell proliferation. Camptothecin (CPT), however, triggered activation of caspase-3 without induction of caspase-12, and reduced cell proliferation. In addition, CPT-induced cell death was reversed by pre-treatment with z-DEVD, a caspase-3-specific inhibitor. CONCLUSIONS Detailed exploitation of the regulators of caspase-3 activation could open the gate for finding an efficient target for development of anticancer therapeutics against HBx-transformed hepatocellular carcinoma.
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Affiliation(s)
- A Kim
- Functional Metabolomics Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Yuseong, South Korea
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Kim J, Chang DH, Chang DS, In SR, Jeong SH, Jin JT, Jung KS, Kim BY, Kim TS, Lee KW, Oh BH, Seo CS, Seo MS, Song WS, Yoon BJ. An ion optics study for KSTAR neutral beam injector development. Rev Sci Instrum 2008; 79:02C104. [PMID: 18315230 DOI: 10.1063/1.2804879] [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: 05/26/2023]
Abstract
Ion optics of three accelerator geometries was studied in terms of an analytic linear optics analysis, a numerical simulation using the IGUN program, an optical multichannel measurement of Doppler-shifted H(alpha) lines, and a water-flow calorimetry on the beam absorbing target. In general, there was a reasonable agreement observed between the four analysis methods and thus the theoretical analyses can be utilized with confidence for design iteration.
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Affiliation(s)
- Jinchoon Kim
- Korea Atomic Energy Research Institute, Daejeon, Republic of Korea.
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Kim BS, Kim SY, Park J, Park W, Hwang KY, Yoon YJ, Oh WK, Kim BY, Ahn JS. Sequence-based screening for self-sufficient P450 monooxygenase from a metagenome library. J Appl Microbiol 2007; 102:1392-400. [PMID: 17448174 DOI: 10.1111/j.1365-2672.2006.03169.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [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: 11/28/2022]
Abstract
AIMS Cytochrome P450 monooxygenases (CYPs) are useful catalysts for oxidation reactions. Self-sufficient CYPs harbour a reductive domain covalently connected to a P450 domain and are known for their robust catalytic activity with great potential as biocatalysts. In an effort to expand genetic sources of self-sufficient CYPs, we devised a sequence-based screening system to identify them in a soil metagenome. METHODS AND RESULTS We constructed a soil metagenome library and performed sequence-based screening for self-sufficient CYP genes. A new CYP gene, syk181, was identified from the metagenome library. Phylogenetic analysis revealed that SYK181 formed a distinct phylogenic line with 46% amino-acid-sequence identity to CYP102A1 which has been extensively studied as a fatty acid hydroxylase. The heterologously expressed SYK181 showed significant hydroxylase activity towards naphthalene and phenanthrene as well as towards fatty acids. CONCLUSIONS Sequence-based screening of metagenome libraries is expected to be a useful approach for searching self-sufficient CYP genes. The translated product of syk181 shows self-sufficient hydroxylase activity towards fatty acids and aromatic compounds. SIGNIFICANCE AND IMPACT OF THE STUDY SYK181 is the first self-sufficient CYP obtained directly from a metagenome library. The genetic and biochemical information on SYK181 are expected to be helpful for engineering self-sufficient CYPs with broader catalytic activities towards various substrates, which would be useful for bioconversion of natural products and biodegradation of organic chemicals.
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Affiliation(s)
- B S Kim
- College of Life and Environmental Sciences, Korea University, seongbuk-Gu, Seoul, Korea.
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Ahn SC, Kim BY, Oh WK, Park YM, Kim HM, Ahn JS. Colorimetric heparinase assay for alternative anti-metastatic activity. Life Sci 2006; 79:1661-5. [PMID: 16806278 DOI: 10.1016/j.lfs.2006.05.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2005] [Revised: 01/13/2006] [Accepted: 05/25/2006] [Indexed: 11/28/2022]
Abstract
Heparanase has been previously associated with the metastatic potential, inflammation, and angiogenesis of tumor cells. Heparanase activity has been detected by means of UV absorption, radiolabeled substrates, electrophoretic migration, and heparan sulfate affinity assays. However, those methods have proven to be somewhat problematic with regards to application to actual biological samples, the accessibility of the immobilized substrates, experimental sensitivity, and the separation of degraded products. Rather than focusing on heparanase activity, then, we have developed a rapid, alternative colorimetric heparinase assay, on the basis of the recent finding that sulfated disaccharides generated from heparin by bacterial heparinase exhibit biological properties comparable to those from heparan sulfate by mammalian heparanase. In this study, the concentrations of porcine heparin and bacterial heparinase I were determined using a Sigma Diagnostics Kit. Morus alba was selected as a candidate through this assay system, and an inhibitor, resveratrol, was purified from its methanol extract. Its anti-metastatic effects on the pulmonary metastasis of murine B16 melanoma cells were also evaluated. Our findings suggest that this assay may prove useful as a diagnostic tool for heparinase inhibition, as an alternative anti-metastatic target.
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Affiliation(s)
- S C Ahn
- Department of Microbiology and Immunology, Pusan National University College of Medicine, Ami-dong 1-10, Seo-ku, Pusan 602-739, Korea
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Kim MS, Kim SH, Kim HJ, Hoang IN, Oh WM, Koh JT, Park HO, Jeong JY, Kim WJ, Lee EJ, Koh JY, Kim BY, Jensen RH. Characterization of the TSU-PR1 cell line by chromosome painting and flow cytometry. ACTA ACUST UNITED AC 2006; 163:17-22. [PMID: 16271951 DOI: 10.1016/j.cancergencyto.2005.04.010] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2005] [Revised: 04/07/2005] [Accepted: 04/08/2005] [Indexed: 10/25/2022]
Abstract
TSU-PR1 was originally reported as a prostatic carcinoma cell line derived from a lymph node metastasis. Recently, however, this cell line was reported to be derived from T24 bladder carcinoma cells, and thus further definition of its origin is needed. Conventional cytogenetic study of TSU-PR1 showed aneuploidy, ranging from 65 to 86 chromosome with a modal number of 80, and with 10 marker chromosomes, thus conventional cytogenetics cannot be used to determine which chromosomes or regions of chromosomes are critical in cancer development and progression of this cell line. The present study was conducted to characterize genetic changes of the cell line using comparative genomic hybridization (CGH), fluorescence in situ hybridization (FISH), and flow cytometry. CGH results showed that green-to-red fluorescence ratios were within the range of 0.85-1.15, except for a few chromosomes, which reflected near tetraploidy in TSU-PR1. Flow cytometric analysis of TSU-PR1 revealed a DNA index of 3.46n, which is close to the 3.48n calculated from a modal number of 80. The copy numbers of chromosomes 4, 6, 7, 17, and 20 determined by the DNA index and the CGH analyses were 2.85 +/- 0.09, 3.22 +/- 0.77, 3.01 +/- 0.26, 4.05 +/- 0.44, and 4.99 +/- 0.48, respectively. These numbers are also in accordance with the chromosome copy numbers determined with FISH: 2.98 +/- 0.23, 2.91 +/- 0.44, 2.74 +/- 0.44, 3.93 +/- 0.38, and 5.05 +/- 0.78 for chromosomes 4, 6, 7, 17, and 20, respectively (P > 0.05).
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Affiliation(s)
- M S Kim
- Dental Science Research Institute, Department of Oral Anatomy, School of Dentistry, Chonnam National University, Yongbongdong, Gwangju 500-757, Republic of Korea
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22
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Park KS, Kim HJ, Kim EJ, Nam KT, Oh JH, Song CW, Jung HK, Kim DJ, Yun YW, Kim HS, Chung SY, Cho DH, Kim BY, Hong JT. Effect of glycolic acid on UVB-induced skin damage and inflammation in guinea pigs. Skin Pharmacol Physiol 2002; 15:236-45. [PMID: 12218285 DOI: 10.1159/000065970] [Citation(s) in RCA: 13] [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: 11/19/2022]
Abstract
OBJECTIVES Recently the use of glycolic-acid-containing cosmetics has received increased public interest in their supposed ability to reduce wrinkles, roughness, age spots and other skin damage. However, the safety of such products when used excessively or chronically, especially by photosensitive people, is being questioned. The purpose of this study was to examine the effects of glycolic acid alone or in combination with UVB on skin damage and inflammatory response. METHOD Guinea pigs were treated with glycolic acid (from 1 to 7 mg/cm(2)) alone or in combination with UVB (0.4 or 3 J/cm(2)) for 14 days. Skin damage was evaluated by scoring the skin irritation value by the method of Draize and by histopathological observations. Cyclooxygenase 2 (COX-2) expression and prostaglandin E(2) (PGE(2)) production were also assessed. RESULTS Glycolic acid caused an increase in the level of skin damage in a dose- and time-dependent manner. Lower doses (1 and 3 mg/cm(2)) of glycolic acid mostly caused erythema and eschar, and these consequently formed scales, whereas higher doses (5 and 7 mg/cm(2)) of glycolic acid caused redness, edema and necrotic ulceration. Glycolic acid also increased the thickness of the epidermal layer, reduced the organization of the stratum corneum and eventually destroyed some parts of the epidermal layer at 7 mg/cm(2). UVB (0.4 and 3 J/cm(2)) caused redness and edema as well as reduced the integrity of the stratum corneum. Glycolic acid enhanced the UVB-induced skin damage. The magnitude of the damage caused by combined UVB and glycolic acid treatment was much greater than that caused by glycolic acid or UVB alone. Moreover, partial destruction of the epidermal layer was observed in skin treated with 3 J/cm(2) UVB and 3 mg/cm(2) glycolic acid. However, glycolic acid did not change the basal and UVB-induced PGE(2) production and COX-2 protein expression. CONCLUSION These results show that glycolic acid causes skin damage in a dose- and time-dependent manner and that it enhances UVB-induced skin damage without accompanying PGE(2) production or COX-2 protein expression. Therefore, caution should be exercised by those using glycolic acid on a chronic basis or excessively. Moreover, those with photosensitive skins and those more exposed to the sun should be particularly careful.
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Affiliation(s)
- K S Park
- Department of General Toxicology, National Institute of Toxicological Research, Korea Food and Drug Administration, Seoul, Korea
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Kim BY, Krämer H, Yamamoto A, Kominami E, Kohsaka S, Akazawa C. Molecular characterization of mammalian homologues of class C Vps proteins that interact with syntaxin-7. J Biol Chem 2001; 276:29393-402. [PMID: 11382755 DOI: 10.1074/jbc.m101778200] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.0] [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: 11/06/2022] Open
Abstract
Vesicle-mediated protein sorting plays an important role in segregation of intracellular molecules into distinct organelles. Extensive genetic studies using yeast have identified more than 40 vacuolar protein sorting (VPS) genes involved in vesicle transport to vacuoles. However, their mammalian counterparts are not fully elucidated. In this study, we identified two human homologues of yeast Class C VPS genes, human VPS11 (hVPS11) and human VPS18 (hVPS18). We also characterized the subcellular localization and interactions of the protein products not only from these genes but also from the other mammalian Class C VPS homologue genes, hVPS16 and rVPS33a. The protein products of hVPS11 (hVps11) and hVPS18 (hVps18) were ubiquitously expressed in peripheral tissues, suggesting that they have a fundamental role in cellular function. Indirect immunofluorescence microscopy revealed that the mammalian Class C Vps proteins are predominantly associated with late endosomes/lysosomes. Immunoprecipitation and gel filtration studies showed that the mammalian Class C Vps proteins constitute a large hetero-oligomeric complex that interacts with syntaxin-7. These results indicate that like their yeast counterparts, mammalian Class C Vps proteins mediate vesicle trafficking steps in the endosome/lysosome pathway.
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Affiliation(s)
- B Y Kim
- Department of Neurochemistry, National Institute of Neuroscience, NCNP, Kodaira, Tokyo 187-8502, Japan
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Abstract
Null lenses are designed for testing the oblate elliptical surface that is the third mirror of the off-axis three-mirror anastigmatic camera used for remote sensing. Modifying the conventional autostigmatic and autocollimation types of null lenses yields a mixed-type design that has a small annular flat mirror and high sensitivity. Detailed analyses of the sensitivity of the mixed-type null lens system with changes in each surface parameter are described.
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Affiliation(s)
- Y S Kim
- Agency for Defence Development, Taejon, South Korea.
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Abstract
BACKGROUND Although video-assisted thoracoscopic surgery for palmar hyperhidrosis is now widely accepted as the approach of choice, the optimal technique has remained a subject of controversy. We have used 2-mm dual port video-assisted thoracoscopic sympathicotomy for primary palmar hyperhidrosis. This study evaluates the short-term results of the technique. METHODS A retrospective review was carried out of 45 patients, 20 men and 25 women, with a mean age of 24.2 years. In the period from April 1998 to August 1999, 90 consecutive video-assisted sympathicotomy for primary palmar hyperhidrosis either in isolation (n = 56) or in combination with axillary and plantar hyperhidrosis (n = 34) was performed. The mean follow-up period was 11.3 months. Attention was focused on patient's satisfaction, complications, and morbidity. RESULTS Dry limbs were immediately achieved in all patients after surgery. There was no operative mortality and one case of transient Horner's syndrome developed. Eight of 20 with plantar hyperhidrosis showed simultaneous improvement. The overall mean satisfaction rate was 92% +/- 2% with a median 93% improvement using a visual linear analogue scale from 0% (poor) to 100% (excellent). Only 2 patients were dissatisfied with the operative results owing to compensatory hyperhidrosis, which occurred in 25 patients and improved in 20 patients within the follow-up period. CONCLUSIONS The video-assisted thoracoscopic sympathicotomy with 2-mm endoscope is a speedy and safe way of controlling hyperhidrosis with excellent cosmetic results while minimizing complications.
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Affiliation(s)
- B Y Kim
- Department of Thoracic and Cardiovascular Surgery, Sangmoo Hospital, Chipyung-Dong 1240, Suh-Gu, 502-270, Kwang-Ju, South Korea.
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Affiliation(s)
- B Y Kim
- Department of Nuclear Medicine, The Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, Ohio 44195, USA.
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Abstract
Reactive oxygen species (ROS) have emerged as important signaling molecules in the regulation of various cellular processes. In our study, we investigated the effect of a wide range of ROS on Chinese hamster lung fibroblast (V79) cell proliferation. Treatment with H2O2 (100 microM), superoxide anion (generated by 1 mM xanthine and 1 mU/ml xanthine oxidase), menadione, and phenazine methosulfate increased the cell proliferation by approximately 50%. Moreover, a similar result was observed after partial inhibition of superoxide dismutase (SOD) and glutathione peroxidase. This upregulation of cell proliferation was suppressed by pretreatment with hydroxyl radical scavengers and iron chelating agents. In addition to ROS, treatment with exogenous catalase and SOD mimic (MnTMPyP) suppressed the normal cell proliferation. Short-term exposure of the cells to 100 microM H2O2 was sufficient to induce proliferation, which indicated that activation of the signaling pathway is important as an early event. Accordingly, we assessed the ability of H2O2 to activate mitogen-activated protein kinases (MAPK). Jun-N-terminal kinase (JNK) and p38 MAPK were both rapidly and transiently activated by 100 microM H2O2, with maximal activation 30 min after treatment. However, the activity of extracellular signal-regulated kinase (ERK) was not changed. Pretreatment with SB203580 and SB202190, specific inhibitors of p38 MAPK, reduced the cell proliferation induced by H2O2. The activation of both JNK and p38 MAPK was also suppressed by pretreatment with hydroxyl radical scavenger and iron chelating agents. Our results suggest that the trace metal-driven Fenton reaction is a central mechanism that underlies cell proliferation and MAPK activation.
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Affiliation(s)
- B Y Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Taejon, South Korea
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Abounader R, Ranganathan S, Kim BY, Nichols C, Laterra J. Signaling pathways in the induction of c-met receptor expression by its ligand scatter factor/hepatocyte growth factor in human glioblastoma. J Neurochem 2001; 76:1497-508. [PMID: 11238734 DOI: 10.1046/j.1471-4159.2001.00158.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.9] [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: 11/20/2022]
Abstract
Scatter factor/hepatocyte growth factor (SF/HGF) and its tyrosine kinase receptor c-met are developmentally expressed, neuroprotective, and tumorigenic within the CNS. In the present study SF/HGF is shown to induce the expression of c-met in two human glioblastoma cell lines, U-373 MG and T98G, and the signaling pathways involved in this induction are dissected. SF/HGF activated mitogen-activated protein kinase (MAPK) and inhibition of either Ras or MAPK-kinase completely inhibited SF/HGF-mediated c-met induction. Inhibition of phospholipase-C (PLC) did not affect c-met induction in either cell line. Inhibition of phosphoinositide 3-kinase (PI3-kinase) substantially reduced c-met induction by SF/HGF in T98G cells but had no effect in U-373 MG cells. Protein kinase C (PKC) inhibition reduced c-met induction in T98G cells but not in U-373 MG cells. SF/HGF induced the expression of c-fos and c-jun mRNA and increased the levels of AP-1 transcription factor in both cells lines as determined by AP-1-luciferase reporter expression. Transfection of either cell line with TAM-67, a dominant negative for the jun transactivation domain, completely inhibited AP-1 and c-met induction by SF/HGF. These results support a model of c-met induction by SF/HGF in human glioma cells that uniformly involves Ras, MAPK, and AP-1 and additionally involves PI3-kinase and PKC in some cell lines.
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Affiliation(s)
- R Abounader
- Department of Neuroscience, Kennedy Krieger Research Institute, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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Bybel B, Neumann DR, Kim BY, Amin K, Rice T. Lymphoscintigraphy using (99m)Tc filtered sulfur colloid in chylothorax: a case report. J Nucl Med Technol 2001; 29:30-1. [PMID: 11283214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023] Open
Abstract
OBJECTIVE A 66-y-old man was diagnosed with esophageal carcinoma and underwent a right thoracotomy and esophagectomy. Postoperatively, a recurring right pleural effusion developed. Because an attempt at lymphangiography failed, lymphoscintigraphy was suggested. Because of the inability to obtain radiolabeled albumin, dextran, or nanocolloid, we used filtered sulfur colloid. (0.1 um). The study confirmed the diagnosis of chylothorax.
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Affiliation(s)
- B Bybel
- Department of Nuclear Medicine, Cleveland Clinic Foundation, Cleveland, Ohio 44195, USA.
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Bybel B, Beebe W, Kim BY, Faiman C. Contamination of a bracelet following iodine-131 therapy: a case report. J Nucl Med Technol 2000; 28:257-8. [PMID: 11142327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023] Open
Abstract
A 73-y-old patient who had thyroid carcinoma had a post-treatment, whole-body 131I scan. The scan demonstrated an artifact caused by a bracelet contaminated with radioactive perspiration. This finding resulted in an artifact on the scan and had potential radiation safety implications.
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Affiliation(s)
- B Bybel
- Department of Nuclear Medicine, Cleveland Clinic Foundation, Ohio 44195, USA.
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Abstract
We report a case of multicentric, biatrial cardiac myxoma in a 29-year-old female who complained of exertional dyspnea, abdominal distension and peripheral edema. Any other associated skin lesions, breast mass or endocrine disorder presenting complex form were' not seen on her. Also, there was no contributory medical history, hypertension and diabetes mellitus. By using transthoracic echocardiography, we identified a biatrial myxoma attached to the interatrial septum. During surgical excision, we found a large right atrial myxoma with extension through the fossa ovalis into the left atrium and small myxoma attached to the right atrial free wall. After successful resection of interatrial septum and free wall, atrial septal defect was created during the resection and safely repaired by bovine pericardial patch.
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Affiliation(s)
- S J Yoon
- Department of Internal Medicine, Eul-Ji University of Medicine, Taejon, Korea
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Lee JW, Kang DO, Kim BY, Oh WK, Mheen TI, Pyun YR, Ahn JS. Mutagenesis of the glucoamylase signal peptide of Saccharomyces diastaticus and functional analysis in Saccharomyces cerevisiae. FEMS Microbiol Lett 2000; 193:7-11. [PMID: 11094271 DOI: 10.1111/j.1574-6968.2000.tb09394.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
To improve the efficiency of the glucoamylase signal peptide (GSP) of Saccharomyces diastaticus for the secretion of foreign proteins, hybrid plasmids containing one of four types of GSP mutant (m1, Pro(-18)-->Leu(-18); m2, Tyr(-13)-->Leu(-13); m3, Ser(-9)-->Leu(-9); m4, Asn(-5)-->Pro(-5)) were constructed and evaluated in Saccharomyces cerevisiae using Bacillus endo-1,4-beta-D-glucanase (CMCase) as a reporter gene. CMCase secretion by m1, m2 and m3 GSP mutants was increased, likely resulting from a higher probability of the modified GSP to assume an alpha-helical structure. Especially in the case of m3, the substitution of Leu for a polar residue, Ser(-9), in the hydrophobic region resulted in approximately a twofold increase in extracellular CMCase activity. In mutant 4, which disrupts the alpha-helix of GSP, CMCase was less efficiently secreted.
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Affiliation(s)
- J W Lee
- Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejin University, Yusong, Taejon, South Korea
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Choi IS, Kim SJ, Kim BY, Joh JW, Kim YI, Lee SK, Huh WS, Oh HY, Kim DJ, Kim YG, Kim MK, Ko YH, Lee BB. Candida polyarthritis in a renal transplant patient: case report of a patient successfully treated with amphotericin B. Transplant Proc 2000; 32:1963-4. [PMID: 11120021 DOI: 10.1016/s0041-1345(00)01513-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- I S Choi
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University, School of Medicine, Seoul, South Korea
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Cho KJ, Han SH, Kim BY, Hwang SG, Park KK, Yang KH, Chung AS. Chlorophyllin suppression of lipopolysaccharide-induced nitric oxide production in RAW 264.7 cells. Toxicol Appl Pharmacol 2000; 166:120-7. [PMID: 10896853 DOI: 10.1006/taap.2000.8958] [Citation(s) in RCA: 25] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Chlorophyllin (CHL), a water-soluble derivative of chlorophyll, functions as an anticarcinogen and antioxidant. In the present study, we investigated the effect of CHL on nitric oxide production in lipopolysaccharide (LPS)-stimulated RAW 264.7 cells. Treatment with CHL inhibited nitric oxide production in the LPS-stimulated RAW 264. 7 cells in a dose-related manner. Competitive RT-PCR analysis, using a DNA competitor as an internal standard, demonstrated that the treatment with 1, 10, and 50 microM CHL decreased LPS-induced iNOS mRNA expression in a concentration-dependent manner. Since the expression of the iNOS gene is mainly regulated by NF-kappaB, we then examined the effects of CHL on the NF-kappaB DNA binding activity, using an electrophoretic mobility shift assay. CHL down-regulated the NF-kappaB DNA binding on its cognate recognition site at the concentrations just noted. Employing a transfection and reporter gene expression system with p(NF-kappaB)(3)-chloramphenicol acetyl transferase (CAT), the treatment of CHL produced a dose-dependent inhibition of CAT activity in RAW 264.7 cells. Furthermore, CHL partially restored LPS-decreased IkappaBalpha, an inhibitory protein against NF-kappaB activation, in the cytosolic extract from the LPS-treated cells determined by immunoblot analysis. CHL also protected the hydroxyl radical-induced cytotoxicity in RAW 264.7 cells, indicating its antioxidant effect. These results suggest that CHL suppresses the nitric oxide production and iNOS mRNA expression mediated by the inhibition of NF-kappaB activation, and its action mechanism may be based on its antioxidant effect.
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Affiliation(s)
- K J Cho
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, 373-1, Kusong-dong, Yusong-gu, Taejon, 305-701, Korea
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Lee JS, Kim J, Kim BY, Lee HS, Ahn JS, Chang YS. Inhibition of phospholipase cgamma1 and cancer cell proliferation by triterpene esters from Uncaria rhynchophylla. J Nat Prod 2000; 63:753-756. [PMID: 10869194 DOI: 10.1021/np990478k] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Investigation of the hooks of Uncaria rhynchophylla resulted in isolation of six phospholipase Cgamma1 (PLCgamma1) inhibitors (1-6). The structures of these compounds were elucidated as pentacyclic triterpene esters by spectroscopic and chemical analysis. Three of them, namely uncarinic acids C (1), D (2), and E (3), are newly reported as natural products. All the compounds showed dose-dependent inhibitory activities against PLCgamma1 in vitro with IC(50) values of 9.5-44.6 microM and inhibited the proliferation of human cancer cells with IC(50) values of 0.5-6.5 microg/mL.
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Affiliation(s)
- J S Lee
- College of Pharmacy, Seoul National University, Seoul 151-742, Korea, Korea Research Institute of Bioscience and Biotechnology, P.O. Box 115, Yusong, Taejon 305-600, Korea
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36
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Kim BY, Kang DO, Oh WK, Kim JH, Choi YK, Jang JS, Suh PG, Ryu SH, Mheen TI, Ahn JS. Involvement of SH2-SH2-SH3 domain of phospholipase cgamma1 in NF-kappaB signaling. FEBS Lett 2000; 472:45-9. [PMID: 10781802 DOI: 10.1016/s0014-5793(00)01415-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
To directly define the role of phospholipase Cgamma1 (PLCgamma1) in NF-kappaB activation, NF-kappaB promoted luciferase reporter gene plasmid (pNF-kappaB-Luc) was transfected into rat-3Y1 fibroblasts that overexpress whole PLCgamma1 (PLCgamma1-3Y1), src homology domains SH2-SH2-SH3 of PLCgamma1 (SH223-3Y1) and v-src (Src-3Y1). Transient transfection with pNF-kappaB-Luc remarkably increased the luciferase activity in all three transformants compared with normal rat-3Y1 cells. Pretreatment with inhibitors of protein tyrosine kinase reduced this increase in luciferase activity, but U73122 (a PLC inhibitor) did not. While PD98059, an inhibitor of mitogen activated protein kinase (MAPK), significantly reduced the luciferase activity, there was no effect by wortmannin and Ro-31-8220, inhibitors of phosphatidylinositol 3-kinase (PI3K) and protein kinase C (PKC), respectively. This study shows a direct evidence that the SH2-SH2-SH3 region of PLCgamma1 contributes to the NF-kappaB signaling and that MAPK, but not PI3K and PKC, is involved in SH2-SH2-SH3 mediated NF-kappaB activation in these cells.
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Affiliation(s)
- B Y Kim
- Korea Research Institute of Bioscience and Biotechnology, P.O. Box 115, Yusong, Taejon, South Korea
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Kim BY, Choi HH, Park YB, Yu BS, Oh BS. Video assisted thoracoscopic ligation of patent ductus arteriosus. Technique of sliding loop ligation. J Cardiovasc Surg (Torino) 2000; 41:69-72. [PMID: 10836226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Variant video-assisted thoracoscopic surgical technique for closure of patent ductus arteriosus has been introduced. Although the endoscopic clipping device may be a preferred method for interruption of the patent ductus arteriosus, there is always the risk of inadequate clip placement and limitation of application in width of ductus arteriosus. In an effort to overcome this problem we have used a self-made endoscopic loop ligation in 10 patients and herein report the method. Only a small window and one port of access are necessary to dissect the patent ductus arteriosus from the surrounding tissues and to apply the extracorporeally created sliding loop. Successful ligation without shunt is obtained in all cases. The technique is simple and safe even in the presence of a wide ductus.
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Affiliation(s)
- B Y Kim
- Department of Thoracic and Cardiovascular Surgery, Chosun University, South Korea
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38
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Ko HR, Kim BY, Oh WK, Kang DO, Lee HS, Koshino H, Osada H, Mheen TI, Ahn JS. CRM646-A and -B, novel fungal metabolites that inhibit heparinase. J Antibiot (Tokyo) 2000; 53:211-4. [PMID: 10805586 DOI: 10.7164/antibiotics.53.211] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Abstract
A biologically monitored fractionation of methanol extract of the fruit of Evodia rutaecarpa led to the isolation of six quinolone alkaloids, evocarpine (1), 1-methyl-2-[(4Z,7Z)-4,7-tridecadienyl]-4(1H)-quinolone (2), 1-methyl-2-[(6Z,9Z)-6,9-pentadecadienyl]-4(1H)-quinolo ne (3), 1-methyl-2-undecyl-4(1H)-quinolone (4), dihydroevocarpine (5), 1-methyl-2-pentadecyl-4(1H)-quinolone (6). They showed potent anti-Helicobacter pylori activity with the minimum inhibitory concentration (MIC) value of 10-20 microg/ml. However, they had no effect on Helicobacter pylori urease activity at the concentration of 300 microg/ml.
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Affiliation(s)
- T C Rho
- Korea Research Institute of Bioscience and Biotechnology, Yusong, Taejon
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40
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Abstract
We demonstrate a new type of high-performance long-period fiber grating based on arc-induced periodic microbends. The fabrication method is simple and does not require special fibers. Flexibility in controlling the filter parameters makes it possible to produce arbitrary filter profiles by use of a simple apodization technique, which is difficult to do with conventional long-period gratings.
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41
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Yong JC, Yun SH, Lee ML, Kim BY. Frequency-division-multiplexed polarimetric fiber laser current-sensor array. Opt Lett 1999; 24:1097-1099. [PMID: 18073951 DOI: 10.1364/ol.24.001097] [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] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We demonstrate a novel frequency-domain-multiplexing technique for implementing polarimetric fiber laser current sensors. Each sensor operates at a different polarization-mode beat frequency that is modulated in response to applied electric current. A bank of bandpass filters can be used to separate signals from different sensors. A simple frequency-demodulation technique based on a phase-locked loop is used for signal processing.
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Kim BY, Kim JH, Han YJ, Ahn SC, Kang DO, Oh WK, Ko HR, Lee HS, Mheen TI, Ahn JS. pp60v-src reactivation inhibits serum-induced accumulation of inositol phosphates and phosphatidylethanol in tsNRK. IUBMB Life 1999; 48:85-9. [PMID: 10791920 DOI: 10.1080/713803467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
In tsRSV-infected NRK (tsNRK) cells, pp60(v-src) reactivation by temperature-shift from a nonpermissive temperature, 39 C, to a permissive one, 32 degrees C, induced the production of inositol phosphates (IPt) and phosphatidylethanol (PEt). This was accompanied by an increase in membrane-associated protein kinase C (PKC) activity in the absence of exogenous growth factors. However, with serum-stimulation, the amounts of IPt and PEt at 32 degrees C were less than those at 39 degrees C. Pretreatment with PKC inhibitors, Ro-31-8220 and staurosporine, enhanced the accumulation of IPt but not of PEt at 32 degrees C. The tyrosine phosphorylation of phospholipase Cgamma1 (PLCgamma1) was increased either by serum or by pp60(v-src) reactivation. These results suggest that serum transduces its signal through PLCgamma1 mediation, and that pp60(v-src), possibly through the PKC mediation, negatively affects serum-induced PLCgamma1 activation.
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Affiliation(s)
- B Y Kim
- Korea Research Institute of Bioscience and Biotechnology, Yusong, Taejon
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Juhng KN, Kokate TG, Yamaguchi S, Kim BY, Rogowski RS, Blaustein MP, Rogawski MA. Induction of seizures by the potent K+ channel-blocking scorpion venom peptide toxins tityustoxin-K(alpha) and pandinustoxin-K(alpha). Epilepsy Res 1999; 34:177-86. [PMID: 10210033 DOI: 10.1016/s0920-1211(98)00111-9] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.8] [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: 10/18/2022]
Abstract
The scorpion venom peptide toxins tityustoxin-K(alpha) (TsTx-K(alpha)) and pandinustoxin-K(alpha) (PiTx-K(alpha)) are novel, highly potent and selective blockers of voltage-activated K+ channels. PiTx-K(alpha) preferentially blocks rapidly inactivating (A-type) K+ channels whereas TsTx-K(alpha) is selective for slowly inactivating (delayed rectifier-type) channels. K+ channel blockers are known to induce seizures, but the specific K channel types that can serve as convulsant targets are not well defined. To address this issue, we examined for convulsant activity the K+ channel type-specific scorpion toxins and the selective K+ channel antagonists 4-aminopyridine (4-AP), an inhibitor of A-type voltage-activated K+ channels, and paxilline, a selective blocker of large conductance (maxi K) Ca(2+)-activated K+ channels. Intracerebroventricular injection of recombinant TsTx-K(alpha) and PiTx-K(alpha) in mice produced limbic and clonic-tonic seizures. The severity of the seizures increased during the 60-min period following injection, culminating in continuous clonic seizure activity (status epilepticus), tonic hindlimb extension, and eventually in death. The estimated doses producing limbic and clonic seizures in 50% of animals (CD50) for TsTx-K(alpha) and PiTx-K(alpha) were 9 and 33 ng, respectively. 4-AP produced seizure activity similar to the toxins (CD50, 76 ng) whereas paxilline failed to induce seizures at doses up to 13.5 microg. Carbamazepine protected fully against the toxin- and 4-AP-induced seizures whereas phenytoin had variable activity against the clonic component although it was protective against tonic hindlimb extension. The AMPA receptor antagonist GYKI 52466 also conferred full protection against toxin-induced seizures, but the NMDA receptor antagonists (R)-CPP and dizocilpine failed to affect limbic and clonic seizures, although they protected against hindlimb extension. We conclude that selective blockade of delayed rectifier- or A-type voltage-activated K+ channels can produce limbic, clonic and tonic seizures, whereas blockade of maxi K-type Ca(2+)-activated K+ channels does not. The convulsant effects may be related to enhanced glutamate release and, in the case of the limbic and clonic convulsions, activation of AMPA receptors.
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Affiliation(s)
- K N Juhng
- Neuronal Excitability Section, Epilepsy Research Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892-1408, USA
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Suzuki H, Hase A, Kim BY, Miyata Y, Nonaka I, Arahata K, Akazawa C. Up-regulation of glial cell line-derived neurotrophic factor (GDNF) expression in regenerating muscle fibers in neuromuscular diseases. Neurosci Lett 1998; 257:165-7. [PMID: 9870346 DOI: 10.1016/s0304-3940(98)00817-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Glial cell line-derived neurotrophic factor (GDNF) has been shown to exert a target-derived trophic factor for motor neurons. Immunohistochemical analyses revealed that expression of GDNF in regeneration muscle fibers was up-regulated in polymyositis (PM) and Duchenne type muscular dystrophy (DMD). Reverse transcriptase polymerase chain reaction (RT-PCR) analyses showed that the full length GDNF was up-regulated in PM and DMD muscle; normal muscle exhibited mostly truncated GDNF. The results indicate that the GDNF expression is regulated in regeneration of human skeletal muscle.
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Affiliation(s)
- H Suzuki
- Department of Neuromuscular Research, National Institute of Neuroscience, NCNP, Kodaira, Tokyo, Japan
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45
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Abstract
Hypothermia is often employed as an anesthetic for manipulations of neonatal animals. We previously reported [J. Nuñez, J.M. Juraska, The effect of neonatal cryoanesthesia on the gross size of the splenium of the corpus callosum, Dev. Psychobiol. 30 (1997) 259; J. Nuñez, J.M. Juraska, The size of the splenium of the rat corpus callosum: influence of hormones, sex ratio and neonatal cryoanesthesia, Dev. Psychobiol., in press.] that the area of the splenium of the adult rat corpus callosum negatively correlated with the time neonatal pups spent in the cold. In the present study, we examined the effect of exposure to neonatal hypothermia (0, 15, 30 and 60 min at 4 degreesC, within 2 h of birth) on the thickness and volume of the binocular (Oc1B) and monocular (Oc1M) fields of the adult rat visual cortex. The number of neurons and glia in layer 2/3 in these areas was also assessed in the 0 and 60 min cold-exposed groups. Cryoanesthesia significantly decreased the length, thickness, volume and number of neurons and glia in both Oc1M and Oc1B. We also observed significant effects of cold exposure on the thickness of individual cortical layers, with some layers affected more than others after differential exposure times. Sex differences (males greater than females) were observed in a number of measures after varying amounts of time in cold and in the absence of cold exposure, in confirmation of previous work from our lab [S.N.M. Reid, J.M. Juraska, Sex differences in the gross size of the rat neocortex, J. Comp. Neurol. 321 (1992) 442-447; S.N.M. Reid, J.M. Juraska, Sex differences in neuron number in the binocular area of the rat visual cortex, J. Comp. Neurol. 321 (1992) 448-455.]. The present study points to the potential confound of using cryoanesthesia on neonatal animals to study cortical structure or function.
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Affiliation(s)
- J L Nuñez
- Neuroscience Program and Department of Psychology, University of Illinois at Champaign-Urbana, 603 E. Daniel Street, Champaign, IL 61820, USA
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Kim HK, Lee DY, Yoon YH, Moon DS, Hong YJ, Kim BY. Xenotransplantation using pig lung in canines: effect of the absorption technique using pig lung. Transplant Proc 1998; 30:3833-5. [PMID: 9838677 DOI: 10.1016/s0041-1345(98)01255-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- H K Kim
- Department of Thoracic and Cardiovascular Surgery, Yongdong Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
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Sampathkumar P, Lerman A, Kim BY, Narr BJ, Poterucha JJ, Torsher LC, Plevak DJ. Post-liver transplantation myocardial dysfunction. Liver Transpl Surg 1998; 4:399-403. [PMID: 9724477 DOI: 10.1002/lt.500040513] [Citation(s) in RCA: 68] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Patients with end-stage liver disease usually show a hyperdynamic circulatory state. It has previously been reported that patients who develop myocardial depression in the early post-liver transplantation period are more prone to organ failure and death. We reviewed the records of 754 adult patients undergoing liver transplantation at our institution and identified 7 patients who initially showed hyperdynamic circulation, but then developed reversible dilated cardiomyopathy in the early posttransplantation period. All identifiable causes of cardiac dysfunction, such as myocardial ischemia, thyroid dysfunction, and electrolyte imbalances, were excluded. Left ventricular ejection fraction decreased from a preoperative median baseline of 60% to 20% (P = .02), with four-chamber dilatation on echocardiogram. All these patients required supportive care, including mechanical ventilation, afterload reduction, inotropic support, and monitoring in the intensive care unit. Cardiac function subsequently improved in all patients, with ejection fraction increasing to a median of 50%. All patients were discharged from the hospital. At a median follow-up of 15 months, there was no recurrence of heart failure. The increased peripheral resistance seen after successful liver transplantation may be an important causative factor.
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Affiliation(s)
- P Sampathkumar
- Divisions of Critical Care, Mayo Clinic and Mayo Foundation, Rochester, MN 55905, USA
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Yun SH, Richardson DJ, Kim BY. Interrogation of fiber grating sensor arrays with a wavelength-swept fiber laser. Opt Lett 1998; 23:843-5. [PMID: 18087360 DOI: 10.1364/ol.23.000843] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
We demonstrate a novel application of a wavelength-swept fiber laser to fiber Bragg grating sensor-array interrogation. The laser provides high signal powers of >3 mW with <0.1-nm spectral resolution over a 28-nm wavelength span. Using time-interval counting, we demonstrate static-dynamic strain measurements with a resolution of 0.47mu? rms at a sampling rate of 250 Hz.
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Oh WK, Lee HS, Kim BY, Ahn SC, Kang DO, Kim YH, Mheen TI, Ahn JS. CRM-51005, a new phospholipase C inhibitor produced by unidentified fungal strain MT51005. J Antibiot (Tokyo) 1997; 50:1083-5. [PMID: 9510921 DOI: 10.7164/antibiotics.50.1083] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Funakoshi M, Goto K, Kim BY, Arahata K. [Facioscapulohumeral muscular dystrophy (FSHD)]. Nihon Rinsho 1997; 55:3181-5. [PMID: 9436432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Facioscapulohumeral muscular dystrophy (FSHD; MIM 158900) is one of the major forms of muscular dystrophy, and is inherited in an autosomal dominant fashion. In most patients with FSHD, deletion of 3.3 kb tandemly repeated units within the EcoRI fragment, as detected by p13E-11 (D4F104S1) on chromosome 4q35, is associated with the disease (FSHD1A or 4q35-FSHD). Rare (< 5%) 4q35-unlinked FSHD (FSHD1B) is also known, and therefore genetic heterogeneity exists among FSHD. Recent studies based on the distinction of 4q35 EcoRI fragments from those of 10q26 improved the reliability of molecular diagnosis of the disease (> 95% accuracy). However, gene for FSHD1A has not been identified yet. Identification of the FSHD gene and characterization of the gene product are waited on tiptoe with expectation.
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Affiliation(s)
- M Funakoshi
- Department of Neuromuscular Research, National Institute of Neuroscience, NCNP
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