1
|
Kang SY, Ahn HR, Youn HJ, Jung SH. Prognosis of papillary thyroid carcinoma in relation to preoperative subclinical hypothyroidism. Ann R Coll Surg Engl 2021; 103:367-373. [PMID: 33682437 DOI: 10.1308/rcsann.2020.7064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
INTRODUCTION It has been established that thyroid-stimulating hormone (TSH) stimulates the growth and development of thyroid malignancy, and a higher serum TSH level is associated with the incidence of thyroid cancer and an advanced tumour stage. This study aimed to evaluate the association of preoperative subclinical hypothyroidism with the prognosis of papillary thyroid cancer (PTC). METHODS A total of 466 patients who underwent surgery for PTC between December 2006 and June 2009 were enrolled. Among them, 44 patients had subclinical hypothyroidism, while 422 did not have subclinical hypothyroidism, as diagnosed using the preoperative thyroid function test. We compared the recurrence rate and association with clinicopathological features in the two groups. RESULTS The median patient age was 46.9 years (17-74 years). There were 420 female and 46 male patients. The median follow-up duration was 81.4 months. There were no statistical differences between the two groups with respect to age, sex, tumour size, extrathyroidal extension, multifocality, lymph node metastasis, TNM stages, recurrence and disease-free survival, despite a significant difference in the average TSH concentrations of the two groups. CONCLUSIONS Our results suggest that preoperative subclinical hypothyroidism was not associated with tumour aggressiveness and recurrence in PTC.
Collapse
Affiliation(s)
- S Y Kang
- Research Institute of Clinical Medicine, Jeonbuk National University and Biomedical Research Institute, Korea
| | - H R Ahn
- Research Institute of Clinical Medicine, Jeonbuk National University and Biomedical Research Institute, Korea
| | - H J Youn
- Research Institute of Clinical Medicine, Jeonbuk National University and Biomedical Research Institute, Korea
| | - S H Jung
- Research Institute of Clinical Medicine, Jeonbuk National University and Biomedical Research Institute, Korea
| |
Collapse
|
2
|
Park CS, Gwon A, Ahn HS, Kim GH, Cho JS, Youn HJ. P1535 Interventricular interaction can result in right ventricular dysfunction in interventricular septum involved myocardial infarction patient. Eur Heart J Cardiovasc Imaging 2020. [DOI: 10.1093/ehjci/jez319.957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Previous studies revealed that interventricular septal thickness is related to right ventricular dysfunction after anterior myocardial infarction. This finding suggest that interventricular septal function can affect right ventricular function in myocardial infarction patients. We assumed that right ventricular free wall strain values measured using dedicated software can be affected in the setting of ischemic insult on interventricular septum in long-term follow up.
Methods
The patients diagnosed as acute myocardial infarction due to left anterior descending artery disease who underwent successful revascularization were enrolled. Echocardiographic exams were performed at least 2 times, within 72 hours and 1 year after the revascularization. Strain values of interventricular septum and right ventricular free wall were derived from the raw-dicom images. The analysis was performed using the dedicated software for the measurement of right ventricular strain.
Results
Total 65 patients were enrolled. The values of global left ventricular strain were increased after the follow up. There were no changes in global longitudinal strain of the right ventricle. But longitudinal stain values acquired from right ventricular free walls were decreased even the strain values measured at left ventricle and interventricular septum were improved.
Conclusion
Interventricular septal dysfunction due to ischemic injury can affect long term right ventricular dysfunction. This finding suggests the interventricular dependence between cardiac chambers and can provide the development of heart failure in myocardial infarction patient even after the successful revascularization.
Strain values of both ventricles Left ventricle after revascularization (n = 65) 1 year later (n = 65) P values Global longitudinal strain (%) -12.84 ± 4.50 -15.62 ± 4.45 <0.001 Septal longitudinal strain (%) -10.77 ± 5.96 -14.02 ± 5.26 <0.001 Right ventricle Global longitudinal strain (%) -19.36 ± 4.57 -19.47 ± 4.83 0.872 Septal longitudinal strain (%) -14.82 ± 4.48 -16.43 ± 6.03 0.055 Free wall longitudinal strain (%) -20.23 ± 5.33 -17.82 ± 5.70 0.010
Abstract P1535 Figure. Right ventricular segmental strain
Collapse
Affiliation(s)
- C S Park
- Catholic University Medical College, Seoul, Korea (Republic of)
| | - A Gwon
- Catholic University Medical College, Seoul, Korea (Republic of)
| | - H S Ahn
- Catholic University Medical College, Seoul, Korea (Republic of)
| | - G H Kim
- Catholic University Medical College, Seoul, Korea (Republic of)
| | - J S Cho
- Catholic University Medical College, Seoul, Korea (Republic of)
| | - H J Youn
- Catholic University Medical College, Seoul, Korea (Republic of)
| |
Collapse
|
3
|
Chung IY, Hur H, Lee J, Lee JW, Youn HJ, Han K, Kim NW, Jung SY, Kim Z, Kim KS, Lee MH, Han SH, Jung SH. Abstract P1-12-02: Withdrawn. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p1-12-02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
This abstract was withdrawn by the authors.
Citation Format: Chung IY, Hur H, Lee J, Lee JW, Youn HJ, Han K, Kim NW, Jung S-Y, Kim Z, Kim KS, Lee MH, Han S-H, Jung SH. Withdrawn [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P1-12-02.
Collapse
Affiliation(s)
- IY Chung
- Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea; National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea; Soonchunhyang University Seoul Hospital, Seoul, Republic of Korea; Chonbuk National University Hospital, Jeonju, Republic of Korea; College of Medicine, Catholic University of Korea, Seoul, Republic of Korea; Breast Cancer Center, National Cancer Center, Goyang, Republic of Korea; Soonchunhyang University College of Medicine, Bucheon, Republic of Korea; Dongkang Medical Center, Ulsan, Republic of Korea; Ajou University, School of Medicine, Suwon, Republic of Korea
| | - H Hur
- Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea; National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea; Soonchunhyang University Seoul Hospital, Seoul, Republic of Korea; Chonbuk National University Hospital, Jeonju, Republic of Korea; College of Medicine, Catholic University of Korea, Seoul, Republic of Korea; Breast Cancer Center, National Cancer Center, Goyang, Republic of Korea; Soonchunhyang University College of Medicine, Bucheon, Republic of Korea; Dongkang Medical Center, Ulsan, Republic of Korea; Ajou University, School of Medicine, Suwon, Republic of Korea
| | - J Lee
- Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea; National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea; Soonchunhyang University Seoul Hospital, Seoul, Republic of Korea; Chonbuk National University Hospital, Jeonju, Republic of Korea; College of Medicine, Catholic University of Korea, Seoul, Republic of Korea; Breast Cancer Center, National Cancer Center, Goyang, Republic of Korea; Soonchunhyang University College of Medicine, Bucheon, Republic of Korea; Dongkang Medical Center, Ulsan, Republic of Korea; Ajou University, School of Medicine, Suwon, Republic of Korea
| | - JW Lee
- Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea; National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea; Soonchunhyang University Seoul Hospital, Seoul, Republic of Korea; Chonbuk National University Hospital, Jeonju, Republic of Korea; College of Medicine, Catholic University of Korea, Seoul, Republic of Korea; Breast Cancer Center, National Cancer Center, Goyang, Republic of Korea; Soonchunhyang University College of Medicine, Bucheon, Republic of Korea; Dongkang Medical Center, Ulsan, Republic of Korea; Ajou University, School of Medicine, Suwon, Republic of Korea
| | - HJ Youn
- Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea; National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea; Soonchunhyang University Seoul Hospital, Seoul, Republic of Korea; Chonbuk National University Hospital, Jeonju, Republic of Korea; College of Medicine, Catholic University of Korea, Seoul, Republic of Korea; Breast Cancer Center, National Cancer Center, Goyang, Republic of Korea; Soonchunhyang University College of Medicine, Bucheon, Republic of Korea; Dongkang Medical Center, Ulsan, Republic of Korea; Ajou University, School of Medicine, Suwon, Republic of Korea
| | - K Han
- Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea; National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea; Soonchunhyang University Seoul Hospital, Seoul, Republic of Korea; Chonbuk National University Hospital, Jeonju, Republic of Korea; College of Medicine, Catholic University of Korea, Seoul, Republic of Korea; Breast Cancer Center, National Cancer Center, Goyang, Republic of Korea; Soonchunhyang University College of Medicine, Bucheon, Republic of Korea; Dongkang Medical Center, Ulsan, Republic of Korea; Ajou University, School of Medicine, Suwon, Republic of Korea
| | - NW Kim
- Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea; National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea; Soonchunhyang University Seoul Hospital, Seoul, Republic of Korea; Chonbuk National University Hospital, Jeonju, Republic of Korea; College of Medicine, Catholic University of Korea, Seoul, Republic of Korea; Breast Cancer Center, National Cancer Center, Goyang, Republic of Korea; Soonchunhyang University College of Medicine, Bucheon, Republic of Korea; Dongkang Medical Center, Ulsan, Republic of Korea; Ajou University, School of Medicine, Suwon, Republic of Korea
| | - S-Y Jung
- Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea; National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea; Soonchunhyang University Seoul Hospital, Seoul, Republic of Korea; Chonbuk National University Hospital, Jeonju, Republic of Korea; College of Medicine, Catholic University of Korea, Seoul, Republic of Korea; Breast Cancer Center, National Cancer Center, Goyang, Republic of Korea; Soonchunhyang University College of Medicine, Bucheon, Republic of Korea; Dongkang Medical Center, Ulsan, Republic of Korea; Ajou University, School of Medicine, Suwon, Republic of Korea
| | - Z Kim
- Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea; National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea; Soonchunhyang University Seoul Hospital, Seoul, Republic of Korea; Chonbuk National University Hospital, Jeonju, Republic of Korea; College of Medicine, Catholic University of Korea, Seoul, Republic of Korea; Breast Cancer Center, National Cancer Center, Goyang, Republic of Korea; Soonchunhyang University College of Medicine, Bucheon, Republic of Korea; Dongkang Medical Center, Ulsan, Republic of Korea; Ajou University, School of Medicine, Suwon, Republic of Korea
| | - KS Kim
- Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea; National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea; Soonchunhyang University Seoul Hospital, Seoul, Republic of Korea; Chonbuk National University Hospital, Jeonju, Republic of Korea; College of Medicine, Catholic University of Korea, Seoul, Republic of Korea; Breast Cancer Center, National Cancer Center, Goyang, Republic of Korea; Soonchunhyang University College of Medicine, Bucheon, Republic of Korea; Dongkang Medical Center, Ulsan, Republic of Korea; Ajou University, School of Medicine, Suwon, Republic of Korea
| | - MH Lee
- Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea; National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea; Soonchunhyang University Seoul Hospital, Seoul, Republic of Korea; Chonbuk National University Hospital, Jeonju, Republic of Korea; College of Medicine, Catholic University of Korea, Seoul, Republic of Korea; Breast Cancer Center, National Cancer Center, Goyang, Republic of Korea; Soonchunhyang University College of Medicine, Bucheon, Republic of Korea; Dongkang Medical Center, Ulsan, Republic of Korea; Ajou University, School of Medicine, Suwon, Republic of Korea
| | - S-H Han
- Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea; National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea; Soonchunhyang University Seoul Hospital, Seoul, Republic of Korea; Chonbuk National University Hospital, Jeonju, Republic of Korea; College of Medicine, Catholic University of Korea, Seoul, Republic of Korea; Breast Cancer Center, National Cancer Center, Goyang, Republic of Korea; Soonchunhyang University College of Medicine, Bucheon, Republic of Korea; Dongkang Medical Center, Ulsan, Republic of Korea; Ajou University, School of Medicine, Suwon, Republic of Korea
| | - SH Jung
- Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea; National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea; Soonchunhyang University Seoul Hospital, Seoul, Republic of Korea; Chonbuk National University Hospital, Jeonju, Republic of Korea; College of Medicine, Catholic University of Korea, Seoul, Republic of Korea; Breast Cancer Center, National Cancer Center, Goyang, Republic of Korea; Soonchunhyang University College of Medicine, Bucheon, Republic of Korea; Dongkang Medical Center, Ulsan, Republic of Korea; Ajou University, School of Medicine, Suwon, Republic of Korea
| |
Collapse
|
4
|
Jung MH, Youn HJ, An SJ. P4441Elevated heart rate is associated with osteoporosis in hypertensive elderly women: results from the KNHANES 2009-2010. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p4441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- M H Jung
- Chuncheon Sacred Heart Hospital, Cardiovascular center, Chuncheon, Korea Republic of
| | - H J Youn
- Seoul St. Mary's Hospital, Department of Internal Medicine, Seoul, Korea Republic of
| | - S J An
- Seoul National University, Seoul, Korea Republic of
| |
Collapse
|
5
|
Winter R, Fazlinezhad A, Martins Fernandes S, Pellegrino M, Iriart X, Moustafa S, Stolfo D, Bieseviciene M, Patel S, Vriz O, Sarvari SI, Santos M, Berezin A, Stoebe S, Benyounes Iglesias N, De Chiara B, Soliman A, Oni O, Ricci F, Tumasyan LR, Kim KH, Popa BA, Yiangou K, Olsen RH, Cacicedo A, Monti L, Holte E, Orlic D, Trifunovic D, Nucifora G, Casalta AC, Cavalcante JL, Keramida K, Calin A, Almeida Morais L, Bandera F, Galli E, Kamal HM, Leite L, Polte CL, Martinez Santos P, Jin CN, Generati G, Reali M, Kalcik M, Cacicedo A, Nascimento H, Ferreiro Quero C, Kazum S, Madeira S, Villagra JM, Muraru D, Gobbo M, Generati G, D'andrea A, Azevedo O, Nucifora G, Cruz I, Lozano Granero VC, Stampfli SF, Marketou M, Bento D, Mohty D, Hernandez Jimenez V, Gascuena R, Ingvarsson A, Cameli M, Werther Evaldsson A, Greiner S, Michelsen MM, El Eraky AZZA, Kamal HM, D'ascenzi F, Spinelli L, Stojanovic S, Mincu RI, Vindis D, Mantovani F, Yi JE, Styczynski G, Battah AHMED, O'driscoll J, Generati G, Velasco Del Castillo S, Voilliot D, Scali MC, Garcia Campos A, Opitz B, Herold IHF, Veiga CESAR, Santos Furtado M, Khan UM, Leite L, Leite L, Leite L, Keramida K, Molnar AA, Rio P, Huang MS, Papadopoulos C, Venneri L, Onut R, Casas Rojo E, Bayat F, Aggeli C, Ben Kahla S, Abid L, Choi JH, Barreiro Perez M, Lindqvist P, Sheehan F, Vojdanparast M, Nezafati P, Teixeira R, Generati G, Bandera F, Labate V, Alfonzetti E, Guazzi M, Dinet ML, Jalal Z, Cochet H, Thambo JB, Ho TH, Shah P, Murphy K, Nelluri BK, Lee H, Wilansky S, Mookadam F, Tonet E, Merlo M, Barbati G, Gigli M, Pinamonti B, Ramani F, Zecchin M, Sinagra G, Vaskelyte JJ, Mizariene V, Lesauskaite V, Verseckaite R, Karaliute R, Jonkaitiene R, Li L, Craft M, Danford D, Kutty S, Pellegrinet M, Zito C, Carerj S, Di Bello V, Cittadini A, Bossone E, Antonini-Canterin F, Rodriguez M, Sitges M, Sepulveda-Martinez A, Gratacos E, Bijnens B, Crispi F, Leite L, Martins R, Baptista R, Barbosa A, Ribeiro N, Oliveira A, Castro G, Pego M, Samura T, Kremzer A, Tarr A, Pfeiffer D, Hagendorff A, Van Der Vynckt C, Gout O, Devys JM, Cohen A, Musca F, D'angelo L, Cipriani MG, Parolini M, Rossi A, Santambrogio GM, Russo C, Giannattasio C, Moreo A, Moharram M, Gamal A, Reda A, Adebiyi A, Aje A, Aquilani R, Dipace G, Bucciarelli V, Bianco F, Miniero E, Scipioni G, De Caterina R, Gallina S, Adamyan KG, Chilingaryan AL, Tunyan LG, Cho JY, Yoon HJ, Ahn Y, Jeong MH, Cho JG, Park JC, Popa A, Cerin G, Azina CH, Yiangou A, Georgiou C, Zitti M, Ioannides M, Chimonides S, Pedersen LR, Snoer M, Christensen TE, Ghotbi AA, Hasbak P, Kjaer A, Haugaard SB, Prescott E, Velasco Del Castillo S, Gomez Sanchez V, Anton Ladislao A, Onaindia Gandarias J, Rodriguez Sanchez I, Jimenez Melo O, Garcia Cuenca E, Zugazabeitia Irazabal G, Romero Pereiro A, Nardi B, Di Giovine G, Malanchini G, Scardino C, Balzarini L, Presbitero P, Gasparini GL, Tesic M, Zamaklar-Trifunovic D, Vujisic-Tesic B, Borovic M, Milasinovic D, Zivkovic M, Kostic J, Belelsin B, Ostojic M, Krljanac G, Savic L, Asanin M, Aleksandric S, Petrovic M, Zlatic N, Lasica R, Mrdovic I, Muser D, Zanuttini D, Tioni C, Bernardi G, Spedicato L, Proclemer A, Galli E, Szymanski C, Salaun E, Lavoute C, Haentjens J, Tribouilloy C, Mancini J, Donal E, Habib G, Delgado-Montero A, Dahou A, Caballero L, Rijal S, Gorcsan J, Monin JL, Pibarot P, Lancellotti P, Kouris N, Kostopoulos V, Giannaris V, Trifou E, Markos L, Mihalopoulos A, Mprempos G, Olympios CD, Mateescu AD, Rosca M, Beladan CC, Enache R, Gurzun MM, Varga P, Calin C, Ginghina C, Popescu BA, Galrinho A, Branco L, Gomes V, Timoteo AT, Daniel P, Rodrigues I, Rosa S, Fragata J, Ferreira R, Generati G, Pellegrino M, Carbone F, Labate V, Alfonzetti E, Guazzi M, Leclercq C, Samset E, Donal E, Oraby MA, Eleraky AZ, Yossuef MA, Baptista R, Teixeira R, Ribeiro N, Oliveira AP, Barbosa A, Castro G, Martins R, Elvas L, Pego M, Gao SA, Lagerstrand KM, Johnsson ÅA, Bech-Hanssen O, Vilacosta I, Batlle Lopez E, Sanchez Sauce B, Jimenez Valtierra J, Espana Barrio E, Campuzano Ruiz R, De La Rosa Riestra A, Alonso Bello J, Perez Gonzalez F, Wan S, Sun JP, Lee AP, Bandera F, Pellegrino M, Carbone F, Labate V, Alfonzetti E, Guazzi M, Cimino S, Salatino T, Silvetti E, Mancone M, Pennacchi M, Giordano A, Sardella G, Agati L, Yesin M, Gunduz S, Gursoy MO, Astarcioglu MA, Karakoyun S, Bayam E, Cersit S, Ozkan M, Velasco Del Castillo S, Gomez Sanchez V, Anton Ladislao A, Onaindia Gandarias J, Rodriguez Sanchez I, Jimenez Melo O, Quintana Razcka O, Romero Pereiro A, Zugazabeitia Irazabal G, Braga M, Flores L, Ribeiro V, Melao F, Dias P, Maciel MJ, Bettencourt P, Mesa Rubio MD, Ruiz Ortiz M, Delgado Ortega M, Sanchez Fernandez J, Duran Jimenez E, Morenate Navio C, Romero M, Pan M, Suarez De Lezo J, Vaturi M, Weisenberg D, Monakier D, Valdman A, Vaknin- Assa H, Assali A, Kornowski R, Sagie A, Shapira Y, Ribeiras R, Abecasis J, Teles R, Castro M, Tralhao A, Horta E, Brito J, Andrade M, Mendes M, Avegliano G, Ronderos R, Matta MG, Camporrotondo M, Castro F, Albina G, Aranda A, Navia D, Siciliano M, Migliore F, Cavedon S, Folino F, Pedrizzetti G, Bertaglia M, Corrado D, Iliceto S, Badano LP, Merlo M, Stolfo D, Losurdo P, Ramani F, Barbati G, Pivetta A, Pinamonti B, Sinagra GF, Di Lenarda A, Bandera F, Pellegrino M, Labate V, Carbone F, Alfonzetti E, Guazzi M, Di Palma E, Baldini L, Verrengia M, Vastarella R, Limongelli G, Bossone E, Calabro' R, Russo MG, Pacileo G, Cruz I, Correia E, Bento D, Teles L, Lourenco C, Faria R, Domingues K, Picarra B, Marques N, Muser D, Gianfagna P, Morocutti G, Proclemer A, Gomes AC, Lopes LR, Stuart B, Caldeira D, Morgado G, Almeida AR, Canedo P, Bagulho C, Pereira H, Pardo Sanz A, Marco Del Castillo A, Monteagudo Ruiz JM, Rincon Diaz LM, Ruiz Rejon F, Casas E, Hinojar R, Fernandez-Golfin C, Zamorano Gomez JL, Erhart L, Staehli BE, Kaufmann BA, Tanner FC, Kontaraki J, Parthenakis F, Maragkoudakis S, Zacharis E, Patrianakos A, Vardas P, Domingues K, Correia E, Lopes L, Teles L, Picarra B, Magalhaes P, Faria R, Lourenco C, Azevedo O, Boulogne C, Magne J, Damy T, Martin S, Boncoeur MP, Aboyans V, Jaccard A, Saavedra Falero J, Alberca Vela MT, Molina Blazquez L, Mata Caballero R, Serrano Rosado JA, Elviro R, Di Gioia C, Fernandez Rozas I, Manzano MC, Martinez Sanchez JI, Molina M, Palma J, Werther Evaldsson A, Radegran G, Stagmo M, Waktare J, Roijer A, Meurling CJ, Righini FM, Sparla S, Di Tommaso C, Focardi M, D'ascenzi F, Tacchini D, Maccherini M, Henein M, Mondillo S, Ingvarsson A, Waktare J, Thilen U, Stagmo M, Roijer A, Radegran G, Meurling C, Jud A, Aurich M, Katus HA, Mereles D, Faber R, Pena A, Mygind ND, Suhrs HE, Zander M, Prescott E, Handoka NESRIN, Ghali MONA, Eldahshan NAHED, Ibrahim AHMED, Al-Eraky AZ, El Attar MA, Omar AS, Pelliccia A, Alvino F, Solari M, Cameli M, Focardi M, Bonifazi M, Mondillo S, Giudice CA, Assante Di Panzillo E, Castaldo D, Riccio E, Pisani A, Trimarco B, Deljanin Ilic M, Ilic S, Magda LS, Florescu M, Velcea A, Mihalcea D, Chiru A, Popescu BO, Tiu C, Vinereanu D, Hutyra M, Cechakova E, Littnerova S, Taborsky M, Lugli R, Bursi F, Fabbri M, Modena MG, Stefanelli G, Mussini C, Barbieri A, Youn HJ, O JH, Yoon HJ, Jung HO, Shin GJ, Rdzanek A, Pietrasik A, Kochman J, Huczek Z, Milewska A, Marczewska M, Szmigielski CA, Abd Eldayem SOHA, El Magd El Bohy ABO, Slee A, Peresso V, Nazir S, Sharma R, Bandera F, Pellegrino M, Labate V, Carbone F, Alfonzetti E, Guazzi M, Anton Ladislao A, Gomez Sanchez V, Cacidedo Fernandez Bobadilla A, Onaindia Gandarias JJ, Rodriguez Sanchez I, Romero Pereira A, Quintana Rackza O, Jimenez Melo O, Zugazabeitia Irazabal G, Huttin O, Venner C, Deballon R, Manenti V, Villemin T, Olivier A, Sadoul N, Juilliere Y, Selton-Suty C, Simioniuc A, Mandoli GE, Dini FL, Marzilli M, Picano E, Martin-Fernandez M, De La Hera Galarza JM, Corros-Vicente C, Leon-Aguero V, Velasco-Alonso E, Colunga-Blanco S, Fidalgo-Arguelles A, Rozado-Castano J, Moris De La Tassa C, Stelzmueller ME, Wisser W, Reichenfelser W, Mohl W, Saporito S, Mischi M, Bouwman RA, Van Assen HC, Van Den Bosch HCM, De Lepper A, Korsten HHM, Houthuizen P, Rodrigues A, Leal G, Silvestre O, Andrade J, Hjertaas JJ, Greve G, Matre K, Teixeira R, Baptista R, Barbosa A, Ribeiro N, Castro G, Martins R, Cardim N, Goncalves L, Pego M, Teixeira R, Baptista R, Barbosa A, Ribeiro N, Castro G, Martins R, Cardim N, Goncalves L, Pego M, Teixeira R, Baptista R, Barbosa A, Oliveira AP, Castro G, Martins R, Cardim N, Goncalves L, Pego M, Kouris N, Kostopoulos V, Markos L, Olympios CD, Kovacs A, Tarnoki AD, Tarnoki DL, Kolossvary M, Apor A, Maurovich-Horvat P, Jermendy G, Sengupta P, Merkely B, Viveiros Monteiro A, Galrinho A, Pereira-Da-Silva T, Moura Branco L, Timoteo A, Abreu J, Leal A, Varela F, Cruz Ferreira R, Yang LT, Tsai WC, Mpaltoumas K, Fotoglidis A, Triantafyllou K, Pagourelias E, Kassimatis E, Tzikas S, Kotsiouros G, Mantzogeorgou E, Vassilikos V, Calicchio F, Manivarmane R, Pareek N, Baksi J, Rosen S, Senior R, Lyon AR, Khattar RS, Marinescu C, Onciul S, Zamfir D, Tautu O, Dorobantu M, Carbonell San Roman A, Rincon Diez LM, Gonzalez Gomez A, Fernandez Santos S, Lazaro Rivera C, Moreno Vinues C, Sanmartin Fernandez M, Fernandez-Golfin C, Zamorano Gomez JL, Alirezaei T, Karimi AS, Kakiouzi V, Felekos I, Panagopoulou V, Latsios G, Karabela M, Petras D, Tousoulis D, Abid L, Abid D, Kammoun S, Ben Kahla S, Lee JW, Martin Fernandez M, Costilla Garcia SM, Diaz Pelaez E, Moris De La Tassa C. Poster session 3The imaging examinationP646Simulator-based testing of skill in transthoracic echoP647Clinical and echocardiographic characteristics of isolated left ventricular non-compactionP648Appropriate use criteria of transthoracic echocardiography and its clinical impact in an aged populationAnatomy and physiology of the heart and great vesselsP649Prevalence and determinants of exercise oscillatory ventilation in the EUROEX trial populationAssessment of diameters, volumes and massP650Left atrial remodeling after percutaneous left atrial appendage closureP651Global atrial performance with tyrosine kinase inhibitors in metastatic renal cell carcinomaP652Early right ventricular response to cardiac resynchronization therapy: impact on clinical outcomesP653Parameters of speckle-tracking echocardiography and biomechanical values of a dilative ascending aortaAssessments of haemodynamicsP654Right atrial hemodynamics in infants and children: observations from 3-dimensional echocardiography derived right atrial volumesAssessment of systolic functionP655One-point carotid wave intensity predicts cardiac mortality in patients with congestive heart failure and reduced ejection fractionP656Persistence of cardiac remodeling in adolescents with previous fetal growth restrictionP6572D speckle tracking-derived left ventricle global longitudinal strain and left ventricular dysfunction stages: a useful discriminator in moderate-to-severe aortic regurgitationP658Global longitudinal strain and strain rate in type two diabetes patients with chronic heart failure: relevance to circulating osteoprotegerinP659Analysis of left ventricular function in patients before and after surgical and interventional mitral valve therapyP660Left ventricular end-diastolic volume is complementary with global longitudinal strain for the prediction of left ventricular ejection fraction in echocardiographic daily practiceP661Left ventricular assist device, right ventricle function, and selection bias: the light side of the moonP662Assessment of right ventricular function in patients with anterior ST elevation myocardial infarction; a 2-d speckle tracking studyP663Right ventricular systolic function assessment in sickle cell anaemia using echocardiographyAssessment of diastolic functionP664Prognostic value of transthoracic cardiopulmonary ultrasound in cardiac surgery intensive care unitP665Comparative efficacy of renin-angiotensin system modulators on prognosis, right heart and left atrial parameters in patients with chronic heart failure and preserved left ventricular systolic functionP666Left atrial volume index is the most significant diastolic functional parameter of hemodynamic burden as measured by NT-proBNP in acute myocardial infarctionP667Preventive echocardiographic screening. preliminary dataP668Assessment of the atrial electromechanical delay and the mechanical functions of the left atrium in patients with diabetes mellitus type IIschemic heart diseaseP669Coronary flow velocity reserve by echocardiography as a measure of microvascular function: feasibility, reproducibility and agreement with PET in overweight patients with coronary artery diseaseP670Influence of cardiovascular risk in the occurrence of events in patients with negative stress echocardiographyP671Prevalence of transmural myocardial infarction and viable myocardium in chronic total occlusion (CTO) patientsP672The impact of the interleukin 6 receptor antagonist tocilizumab on mircovascular dysfunction after non st elevation myocardial infarction assessed by coronary flow reserve from a randomized studyP673Impact of manual thrombus aspiration on left ventricular remodeling: the echocardiographic substudy of the randomized Physiologic Assessment of Thrombus Aspirtion in patients with ST-segment ElevatioP674Acute heart failure in STEMI patients treated with primary percutaneous coronary intervention is related to transmural circumferential myocardial strainP675Long-term prognostic value of infarct size as assessed by cardiac magnetic resonance imaging after a first st-segment elevation myocardial infarctionHeart valve DiseasesP676Prognostic value of LV global longitudinal strain in aortic stenosis with preserved LV ejection fractionP677Importance of longitudinal dyssynchrony in low flow low gradient severe aortic stenosis patients undergoing dobutamine stress echocardiography. a multicenter study (on behalf of the HAVEC group)P678Predictive value of left ventricular longitudinal strain by 2D Speckle Tracking echocardiography, in asymptomatic patients with severe aortic stenosis and preserved ejection fractionP679Clinical and echocardiographic characteristics of the flow-gradient patterns in patients with severe aortic stenosis and preserved left ventricular ejection fractionP6802D and 3D speckle tracking assessment of left ventricular function in severe aortic stenosis, a step further from biplane ejection fractionP681Functional evaluation in aortic stenosis: determinant of exercise capacityP682Left ventricular mechanics: novel tools to evaluate left ventricular function in patients with primary mitral regurgitationP683Plasma B-type natriuretic peptide level in patients with isolated rheumatic mitral stenosisP684Quantitative assessment of severity in aortic regurgitation and the influence of elastic proprieties of thoracic aortaP685Characterization of chronic aortic and mitral regurgitation using cardiovascular magnetic resonanceP686Functional mitral regurgitation: a warning sign of underlying left ventricular systolic dysfunction in heart failure with preserved ejection fraction.P687Secondary mitral valve tenting in primary degenerative prolapse quantified by three-dimensional echocardiography predicts regurgitation recurrence after mitral valve repairP688Advanced heart failure with reduced ejection fraction and severe mitral insufficiency compensate with a higher oxygen peripheral extraction to a reduced cardiac output vs oxygen uptake response to maxP689Predictors of acute procedural success after percutaneous mitraclip implantation in patients with moderate-to-severe or severe mitral regurgitation and reduced ejection fractionP690The value of transvalvular gradients obtained by transthoracic echocardiography in estimation of severe paravalvular leakage in patients with mitral prosthetic valvesP691Characteristics of infective endocarditis in a non tertiary hospitalP692Infective endocarditis: predictors of severity in a 3-year retrospective analysisP693New echocardiographic predictors of early recurrent mitral functional regurgitation after mitraclip implantationP694Transesophageal echocardiography can be reliably used for the allocation of patients with severe aortic stenosis for tras-catheter aortic valve implantationP695Annular sizing for transcatheter aortic valve selection. A comparison between computed tomography and 3D echocardiographyP696Association between aortic dilatation, mitral valve prolapse and atrial septal aneurysm: first descriptive study.CardiomyopathiesP698Cardiac resynchronization therapy by multipoint pacing improves the acute response of left ventricular mechanics and fluid dynamics: a three-dimensional and particle image velocimetry echo studyP699Long-term natural history of right ventricular function in dilated cardiomyopathy: innocent bystander or leading actor?P700Right to left ventricular interdependence at rest and during exercise assessed by the ratio between pulmonary systolic to diastolic time in heart failure reduced ejection fractionP701Exercise strain imaging demonstrates impaired right ventricular contractile reserve in patients with hypertrophic cardiomyopathyP702Prevalence of overt left ventricular dysfunction (burn-out phase) in a portuguese population of hypertrophic cardiomyopathy, a multicentre studyP703Systolic and diastolic myocardial mechanics in hypertrophic cardiomyopathy and their link to the extent of hypertrophy, replacement fibrosis and interstitial fibrosisP704Multimodality imaging and genotype-phenotype associations in a cohort of patients with hypertrophic cardiomyopathy studied by next generation sequencing and cardiac magnetic resonanceP705Sudden cardiac death risk assessment in apical hypertrophic cardiomyopathy: do we need to add MRI to the equation?P706Prognostic value of left ventricular ejection fraction, proBNP, exercise capacity, and NYHA functional class in patients with left ventricular non-compaction cardiomyopathyP707The anti-hypertrophic microRNAs miR-1, miR-133a and miR-26b and their relationship to left ventricular hypertrophy in patients with essential hypertensionP708Prevalence of left ventricular systolic dysfunction in a portuguese population of left ventricular non-compaction cardiomyopathy, a multicentre studyP709Assessment of systolic and diastolic features in light chain amyloidosis: an echocardiographic and cardiac magnetic resonance studyP710Morbid obesity-associated hypertension identifies bariatric surgery best responders: Clinical and echocardiographic follow up studyP711Echocardiographic markera for overhydration in patients under haemodialysisP712Gender aspects of right ventricular size and function in clinically stable heart transplant patientsP713Evidence of cardiac stem cells from the left ventricular apical tip in patients undergone LVAD implant: a comparative strain-ultrastructural studySystemic diseases and other conditionsP714Speckle tracking assessment of right ventricular function is superior for differentiation of pressure versus volume overloaded right ventricleP715Prognostic value of pulmonary arterial pressure: analysis in a large dataset of timely matched non-invasive and invasive assessmentsP716Effect of the glucagon-like peptide-1 analogue liraglutide on left ventricular diastolic and systolic function in patients with type 2 diabetes: a randomised, single-blinded, crossover pilot studyP717Tissue doppler evaluation of left ventricular functions, left atrial mechanical functions and atrial electromechanical delay in juvenile idiopathic arthritisP718Echocardiographic detection of subclinical left ventricular dysfunction in patients with rheumatoid arthritisP719Left ventricular strain values are unaffected by intense training: a longitudinal, speckle-tracking studyP720Diastolic left ventricular function in autosomal dominant polycystic kidney disease: a matched-cohort, speckle-tracking echocardiographic studyP721Relationship between adiponectin level and left ventricular mass and functionP722Left atrial function is impaired in patients with multiple sclerosisMasses, tumors and sources of embolismP723Paradoxical embolization to the brain in patients with acute pulmonary embolism and confirmed patent foramen ovale with bidirectional shunt, results of prospective monitoringP724Following the European Society of Cardiology proposed echocardiographic algorithm in elective patients with clinical suspicion of infective endocarditis: diagnostic yield and prognostic implicationsP725Metastatic cardiac18F-FDG uptake in patients with malignancy: comparison with echocardiographic findingsDiseases of the aortaP726Echocardiographic measurements of aortic pulse wave velocity correlate well with invasive methodP727Assessment of increase in aortic and carotid intimal medial thickness in adolescent type 1 diabetic patientsStress echocardiographyP728Determinants and prognostic significance of heart rate variability in renal transplant candidates undergoing dobutamine stress echocardiographyP729Pattern of cardiac output vs O2 uptake ratio during maximal exercise in heart failure with reduced ejection fraction: pathophysiological insightsP730Prognostic value and predictive factors of cardiac events in patients with normal exercise echocardiographyP731Right ventricular mechanics during exercise echocardiography: normal values, feasibility and reproducibility of conventional and new right ventricular function parametersP732The added value of exercise-echo in heart failure patients: assessing dynamic changes in extravascular lung waterP733Applicability of appropriate use criteria of exercise stress echocardiography in real-life practice: what have we improved with new documents?Transesophageal echocardiographyP7343D-TEE guidance in percutaneous mitral valve interventions correcting mitral regurgitationContrast echocardiographyP735Pulmonary transit time by contrast enhanced ultrasound as parameter for cardiac performance: a comparison with magnetic resonance imaging and NT-ProBNPReal-time three-dimensional TEEP736Optimal parameter selection for anisotropic diffusion denoising filters applied to aortic valve 4d echocardiographsP737Left ventricle systolic function in non-alcoholic cirrhotic candidates for liver transplantation: a three-dimensional speckle-tracking echocardiography studyTissue Doppler and speckle trackingP738Optimizing speckle tracking echocardiography strain measurements in infants: an in-vitro phantom studyP739Usefulness of vascular mechanics in aortic degenerative valve disease to estimate prognosis: a two dimensional speckle tracking studyP740Vascular mechanics in aortic degenerative valve disease: a two dimensional speckle-tracking echocardiography studyP741Statins and vascular load in aortic valve disease patients, a speckle tracking echocardiography studyP742Is Left Bundle Branch Block only an electrocardiographic abnormality? Study of LV function by 2D speckle tracking in patients with normal ejection fractionP743Dominant inheritance of global longitudinal strain in a population of healthy and hypertensive twinsP744Mechanical differences of left atria in paroxysmal atrial fibrillation: A speckle-tracking study.P745Different distribution of myocardial deformation between hypertrophic cardiomyopathy and aortic stenosisP746Left atrial mechanics in patients with chronic renal failure. Incremental value for atrial fibrillation predictionP747Subclinical myocardial dysfunction in cancer patients: is there a direct effect of tumour growth?P748The abnormal global longitudinal strain predicts significant circumflex artery disease in low risk acute coronary syndromeP7493D-Speckle tracking echocardiography for assessing ventricular funcion and infarct size in young patients after acute coronary syndromeP750Evaluation of left ventricular dyssynchrony by echocardiograhy in patients with type 2 diabetes mellitus without clinically evident cardiac diseaseP751Differences in myocardial function between peritoneal dialysis and hemodialysis patients: insights from speckle tracking echoP752Appraisal of left atrium changes in hypertensive heart disease: insights from a speckle tracking studyP753Left ventricular rotational behavior in hypertensive patients: Two dimensional speckle tracking imaging studyComputed Tomography & Nuclear CardiologyP754Effectiveness of adaptive statistical iterative reconstruction of 64-slice dual-energy ct pulmonary angiography in the patients with reduced iodine load: comparison with standard ct pulmonary angiograP755Clinical prediction model to inconclusive result assessed by coronary computed tomography angiography. Eur Heart J Cardiovasc Imaging 2015. [DOI: 10.1093/ehjci/jev277] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
6
|
Affiliation(s)
- J G Kim
- Cardiovascular Center and Cardiology Division, Seoul St. Mary's Hospital, Seoul, Korea.
| | | | | | | | | | | | | | | |
Collapse
|
7
|
Kim SI, Cho SH, Lee JS, Moon HG, Noh WC, Youn HJ, Ko BK, Park BW. Clinical relevance of lymph node ratio in breast cancer patients with one to three positive lymph nodes. Br J Cancer 2013; 109:1165-71. [PMID: 23942073 PMCID: PMC3778309 DOI: 10.1038/bjc.2013.465] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Revised: 07/16/2013] [Accepted: 07/21/2013] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND To test the hypotheses that breast cancer patients with one to three positive lymph nodes (pN1) consist of heterogeneous prognostic subsets and that the ratio of positive nodes to total nodes dissected (lymph node ratio, LNR) might discriminate patients with a higher risk as candidates for post-mastectomy radiation therapy (PMRT). METHODS Using information from 7741 node-positive patients, we first identified cutoff values of the LNR using the nonparametric bootstrap method. Focusing on 3477 patients with pN1 disease, we then evaluated the clinical relevance of the LNR categorised by the estimated cutoff values (categorised LNR, cLNR). RESULTS Among 3477 patients with pN1 disease, 3059 and 418 patients were assigned into the low and intermediate cLNR groups, respectively, based on a cutoff value of 0.18. The prognostic factors associated with poor overall survival (OS) included younger age, T2 stage, negative oestrogen/progesterone receptors, high histologic grade, and intermediate cLNR. Post-mastectomy radiation therapy significantly increased OS in patients assigned to the intermediate cLNR (hazard ratio, 0.39; 95% confidence interval, 0.17-0.89; P=0.0248), whereas patients in the low cLNR group derived no additional survival benefit from PMRT. CONCLUSION This study suggests that PMRT should be recommended for patients with pN1 disease and an intermediate cLNR.
Collapse
Affiliation(s)
- S I Kim
- Department of Surgery, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-752, Republic of Korea
| | - S-H Cho
- Department of Statistics and Actuarial Science, Soongsil University, 369 Sangdo-ro, Dongjak-gu, Seoul 156-743, Republic of Korea
| | - J S Lee
- Department of Surgery, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-752, Republic of Korea
| | - H-G Moon
- Department of Surgery, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul 110-799, Republic of Korea
| | - W C Noh
- Department of Surgery, Korea Institute of Radiological and Medical Science, Gongneung-Dong, No-won-gu, Seoul 139-709, Republic of Korea
| | - H J Youn
- Department of Surgery, Chonbuk National University Medical School, 20 Geonjiro, Deokjin-gu, Jeonju 561-712, Republic of Korea
| | - B K Ko
- Department of Surgery, University of Ulsan College of Medicine, 877 Jeonha 1-dong, Dong-gu, Ulsan 682-714, Republic of Korea
| | - B-W Park
- Department of Surgery, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-752, Republic of Korea
| |
Collapse
|
8
|
Kim JS, Noh EM, Lee YR, Hwang BM, Jung SH, Youn HJ, Lee SJ. Abstract P5-07-04: Aurora kinase regulates PKC-mediated MMP-9 expression and invasion in MCF-7 breast cancer cells. Cancer Res 2012. [DOI: 10.1158/0008-5472.sabcs12-p5-07-04] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Aurora kinase is a novel family of serine/threonine kinases. Elevated expression of aurora kinase A and B is observed in many tumor cells, and dysregulation of aurora kinase has been linked to tumorigenesis. Therefore, a number of studies focused in their oncogene activities as anti-tumor targets. Matrix metalloproteinase-9 (MMP-9), which degrades the extracellular matrix (ECM) and it is important process for breast cancer cell invasion. MMP-9 can be stimulated by activation of various cellular signaling pathways including protein kinase C (PKC), and mitogen-activated protein kinase (MAPKs), activator protein-1 (AP-1) and nuclear factor-kappaB (NF-κB) signaling pathways. Here, we show that 12-O-tetradecanoylphorbol-13-acetate (TPA), a directly PKC activator stimulation resulted in an up-regulation and phosphorlyation of aurora kinases in MCF-7 breast cancer cells. Also, Results showed that inhibition of the aurora kinases suppressed TPA-induced MMP-9 secretion/expression and cell invasion through suppression of NF-κB, AP-1, and MAPKs in MCF-7 breast cancer cell. In conclusion, this study provides new insight into the novel role of aurora kinase for expression of MMP-9 by TPA and regulation of aurora kinase by TPA through MAPKs signaling pathway.
Citation Information: Cancer Res 2012;72(24 Suppl):Abstract nr P5-07-04.
Collapse
Affiliation(s)
- JS Kim
- Institute for Medical Sciences Chonbuk National University Medical School, Jeonju, Republic of Korea; Chonbuk National University Medical School, Jeonju, Republic of Korea; School of Dentistry, Wonkwang University, Iksan, Republic of Korea; College of Phamacy, Ewha Womans University, Seoul, Republic of Korea
| | - EM Noh
- Institute for Medical Sciences Chonbuk National University Medical School, Jeonju, Republic of Korea; Chonbuk National University Medical School, Jeonju, Republic of Korea; School of Dentistry, Wonkwang University, Iksan, Republic of Korea; College of Phamacy, Ewha Womans University, Seoul, Republic of Korea
| | - YR Lee
- Institute for Medical Sciences Chonbuk National University Medical School, Jeonju, Republic of Korea; Chonbuk National University Medical School, Jeonju, Republic of Korea; School of Dentistry, Wonkwang University, Iksan, Republic of Korea; College of Phamacy, Ewha Womans University, Seoul, Republic of Korea
| | - B-M Hwang
- Institute for Medical Sciences Chonbuk National University Medical School, Jeonju, Republic of Korea; Chonbuk National University Medical School, Jeonju, Republic of Korea; School of Dentistry, Wonkwang University, Iksan, Republic of Korea; College of Phamacy, Ewha Womans University, Seoul, Republic of Korea
| | - SH Jung
- Institute for Medical Sciences Chonbuk National University Medical School, Jeonju, Republic of Korea; Chonbuk National University Medical School, Jeonju, Republic of Korea; School of Dentistry, Wonkwang University, Iksan, Republic of Korea; College of Phamacy, Ewha Womans University, Seoul, Republic of Korea
| | - HJ Youn
- Institute for Medical Sciences Chonbuk National University Medical School, Jeonju, Republic of Korea; Chonbuk National University Medical School, Jeonju, Republic of Korea; School of Dentistry, Wonkwang University, Iksan, Republic of Korea; College of Phamacy, Ewha Womans University, Seoul, Republic of Korea
| | - SJ Lee
- Institute for Medical Sciences Chonbuk National University Medical School, Jeonju, Republic of Korea; Chonbuk National University Medical School, Jeonju, Republic of Korea; School of Dentistry, Wonkwang University, Iksan, Republic of Korea; College of Phamacy, Ewha Womans University, Seoul, Republic of Korea
| |
Collapse
|
9
|
Kim SK, Kim YW, Youn HJ, Jung SH. Abstract P1-10-01: Curcumin suppresses MMP-9 expression via inhibition of PKCα/MAPKs and NF-κB/AP-1 activation in MCF-7 cells. Cancer Res 2012. [DOI: 10.1158/0008-5472.sabcs12-p1-10-01] [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] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Curcumin is a polyphenol derived from the plant turmeric (Curcuma longa), which is commonly used as a spice. It was recently reported for its anticancer effect on several types of cancer cells in vitro, however the molecular mechanisms of this anticancer effect are not fully understood. In the present study, we investigated the effect of curcumin on 12-O-tetradecanoylphorbol-13-acetate(TPA)-induced matrix metalloproteinase-9(MMP-9) expression and cell invasion in MCF-7 breast cancer cells.
Materials and Methods: The effect of curcumin on MCF-7 cell viability was determined using MTT assay. The cells invasion was demonstrated by the Matrigel-coated transwell assay. Western blot analysis was performed to detect the effect of curcumin on the expression of MMP-9. MMP-9 mRNA levels were analyzed by real-time PCR. NF-κB and AP-1 DNA binding was analyzed by EMSA.
Results: Our results showed that curcumin inhibits TPA-induced MMP-9 expression and cell invasion through suppressing NF-κB and AP-1 activation. Curcumin strongly repressed the TPA-induced phosphorylation of p38 and JNK and also inhibited TPA-induced translocation of PKCa from the cytosol to the membrane, but did not affect the translocation of PKCδ.
Conclusion: It is concluded that curcumin inhibits the TPA-induced MMP-9 expression and cell invasion through the suppression of the PKCα/MAPK/NF-kB/AP-1 pathway in MCF-7 breast cancer cells. Accordingly, curcumin may have the therapeutic potential in restricting breast cancer metastasis.
Citation Information: Cancer Res 2012;72(24 Suppl):Abstract nr P1-10-01.
Collapse
Affiliation(s)
- SK Kim
- Chonbuk National University Medical School, Jeonju, Jeollabukdo, Republic of Korea
| | - YW Kim
- Chonbuk National University Medical School, Jeonju, Jeollabukdo, Republic of Korea
| | - HJ Youn
- Chonbuk National University Medical School, Jeonju, Jeollabukdo, Republic of Korea
| | - SH Jung
- Chonbuk National University Medical School, Jeonju, Jeollabukdo, Republic of Korea
| |
Collapse
|
10
|
Noh EM, Kim JS, Hur H, Park BH, Song EK, Han MK, Kwon KB, Yoo WH, Shim IK, Lee SJ, Youn HJ, Lee YR. Cordycepin inhibits IL-1beta-induced MMP-1 and MMP-3 expression in rheumatoid arthritis synovial fibroblasts. Rheumatology (Oxford) 2009; 48:45-8. [PMID: 19056796 DOI: 10.1093/rheumatology/ken417] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
OBJECTIVE MMP is a key enzyme in the degradation of extracellular matrices, and its expression plays important roles in inflammatory diseases. Cordycepin (3'-deoxyadenosine), a bioactive compound of Cordyceps militaris, has been shown to exhibit many pharmacological activities, such as anti-cancer, anti-inflammatory and anti-infection activities. In this study, we aimed at the inhibitory effect of cordycepin on IL-1beta-induced MMP-1 and MMP-3 expression as well as the molecular basis using RA synovial fibroblasts (RASFs). METHODS RASFs were isolated from synovial tissue obtained from 12 patients with RA and cultured in monolayer. Expression of MMP-1 and MMP-3 was evaluated using western blotting and real-time PCR. Chemokines were analysed by ELISA. The phosphorylation of mitogen-activated protein kinase was measured by western blotting. Electrophoretic mobility shift assay was performed to evaluate binding activities of DNA to nuclear factor-kappaB (NF-kappaB) and activator protein-1 (AP-1). RESULTS Cordycepin inhibited IL-1beta-induced MMP-1 and MMP-3 expressions in RASFs in a dose-dependent manner. Among various chemokines [such as monocyte chemoattractant protein-1 (MCP-1), GRO-alpha, regulated upon activation, normal T-cell expressed and presumably secreted (RANTES) and epithelial neutrophil activating peptide 78 (ENA-78)], cordycepin specifically blocked IL-1beta-induced ENA-78 production in RASF. Moreover, cordycepin significantly inhibited IL-1beta-induced p38/JNK and AP-1 activation, but not extracellular signal-regulated kinase (ERK) and NF-kappaB activation. CONCLUSIONS Cordycepin is a potent inhibitor of IL-1beta-induced chemokine production and MMP expression and strongly blocks the p38/JNK/AP-1 signalling pathway in RASFs.
Collapse
Affiliation(s)
- E-M Noh
- Department of Biochemistry, Institute for Medical Science, Chonbuk National University Medical School, Jeonju, South Korea
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Youn HJ, Lakritz J, Rottinghaus GE, Seo HS, Kim DY, Cho MH, Marsh AE. Anti-protozoal efficacy of high performance liquid chromatography fractions of Torilis japonica and Sophora flavescens extracts on Neospora caninum and Toxoplasma gondii. Vet Parasitol 2004; 125:409-14. [PMID: 15482896 DOI: 10.1016/j.vetpar.2004.08.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [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: 08/04/2004] [Accepted: 08/04/2004] [Indexed: 11/28/2022]
Abstract
We previously reported that alcoholic extracts of Sophora flavescens and Torilis japonica from South Korea demonstrated good efficacy in reducing replication of Toxoplasma gondii and Neospora caninum. To characterize the chemical component associated with anti-protozoal activity, specific fractions were isolated by high performance liquid chromatography (HPLC) and used for in vitro testing. These fractions were evaluated in vitro against T. gondii and N. caninum. Fractions of the herb extracts were serially diluted to final concentrations of 2.850 to 0.356 ng/ml in medium and added to wells containing replicating T. gondii and N. caninum. To determine the ability of each fraction to inhibit parasite proliferation, 3H-uracil incorporation was used to determine parasite replication. In cultures infected with T. gondii, a fraction of T. japonica (TJ2) inhibited T. gondii proliferation by 99.2, 94.4, 88.6 and 27.0% in the range from 2.850 to 0.356 ng/ml. Four fractions of S. flavescens (SF1-SF4) inhibited T. gondii proliferation by 99.6-60.6, 96.9-48.1, 92.3-68.2 and 95.4-52.9% in the range from 2.850 to 0.356 ng/ml. In cultures infected with N. caninum, a fraction of T. japonica (TJ2) inhibited N. caninum proliferation by 98.3, 95.5, 79.7 and 30.6% in the range from 2.850 to 0.356 ng/ml. Four fractions of S. flavescens (SF1-SF4) inhibited N. caninum proliferation by 97.1-25.9, 94.8-35.5, 95.9-33.7 and 95.4-49.4% in the range from 2.850 to 0.356 ng/ml. These fractions of T. japonica and S. flavescens extracts are currently undergoing in vivo evaluation in experimentally infected mice.
Collapse
Affiliation(s)
- H J Youn
- College of Veterinary Medicine, Seoul National University, Seoul 151-742, Republic of Korea.
| | | | | | | | | | | | | |
Collapse
|
12
|
Abstract
The purpose of this study was to determine whether alcohol extracts of herbs (Sophora flavescens Aiton, Sinomenium acutum (Thunb.) Rehder and E.H. Wilson, Pulsatilla koreana (Yabe ex Nakai) Nakai ex T. Mori, Ulmus macrocarpa Hance and Torilis japonica (Houtt.) DC.) from South Korea, possess in vitro anti-protozoal activity against cultures of Toxoplasma gondii and Neospora caninum. These herbs have been used as human anti-parasitics in Asian countries for many years. Alcohol extracts of these herbs were serially diluted to final concentrations ranging from 625 to 19.5 ng/ml in media and added to wells containing either T. gondii or N. caninum tachyzoites in equine dermal (ED) cells. Parasite growth inhibition was measured using 3H-uracil incorporation as compared to untreated controls. T. japonica inhibited T. gondii proliferation by 99.3, 95.5, 73.0 and 54.0% in the range from 156 to 19.5 ng/ml, and S. flavescens inhibited T. gondii proliferation by 98.7, 83.0 and 27.2% in the range from 156 to 39 ng/ml. T. japonica inhibited N. caninum proliferation by 97.8, 97.9, 85.3 and 46.4% in the range from 156 to 19.5 ng/ml. S. flavescens inhibited N. caninum proliferation by 98.6, 97.0, 69.5 and 14.0% in the range from 156 to 19.5 ng/ml. Toxicity to host cells was noted when concentrations of T. japonica and S. flavescens exceeded 625 ng/ml. The herb extracts from S. acutum, Pulsatilla koreana, and U. macrocarpa also showed toxicity at higher levels but did not achieve the same inhibition effects at the lower concentrations against T. gondii and N. caninum as T. japonica and S. flavescens.
Collapse
Affiliation(s)
- H J Youn
- Department of Veterinary Parasitology, College of Veterinary Medicine, Seoul National University, Seoul, South Korea.
| | | | | | | | | |
Collapse
|
13
|
|
14
|
Youn HJ, Chung WS, Hong SJ. Tumour feeding vessel in metastatic intracardiac mass demonstrated by transthoracic Doppler echocardiography. Heart 2002; 88:216. [PMID: 12181207 PMCID: PMC1767325 DOI: 10.1136/heart.88.3.216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
|
15
|
Abstract
A multijet and multistage aerosol concentrator was designed and fabricated with two virtual impactors in a series. Collection efficiency, internal loss, and concentration factors were calculated at ambient conditions for each stage. The total inlet flow rate of the aerosol concentrator was set at 1000 L/min(-1), while the minor flow rate for the first stage was at 6.0% of the total inlet flow and the minor flow rate of the second stage was at 6.7% of the first stage minor flow. The aerosol concentrator was calibrated using polystyrene latex particles in aerodynamic sizes ranging from 0.5 to 10 microm. Several configurations of the multijet acceleration nozzles and multitube receptors were designed in this study. The effects of the different designs were subsequently evaluated through experimentation. It was found that a properly designed multijet and multistage aerosol concentrator can significantly improve aerosol concentration performance. Results showed that the concentration factor increases from 1 to 240 over the particle size range studied. Applications of the multijet and multistage aerosol concentrator with high-volume flow rate can vary widely, from detection of biological aerosols at low concentration, laboratory aerosol sampling, clean room monitoring, and ambient aerosol measurements.
Collapse
Affiliation(s)
- M C Kim
- Department of Environmental Science and Engineering, Kwangju Institute of Science and Technology Puk-gu, Korea
| | | | | | | | | | | |
Collapse
|
16
|
|
17
|
Kim JT, Park JY, Seo HS, Oh HG, Noh JW, Kim SW, Youn HJ. Identification of Acanthocephala discovered in changran-pickles and myungran-pickles. J Vet Sci 2001; 2:111-4. [PMID: 14614280] [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: 04/27/2023] Open
Abstract
To identify acanthocephala found in 'Changran-pickles' and 'Myungran-pickles' each organ was measured in permanent slides. In the present report, the results obtained were as follows: 1. Morphology of male worms: Worms possessed 18-19 longitudinal rows, with 4 hooks per row, which became smaller towards the base of proboscis. Each worm contained two testis and six cement glands arranged linearly. Body 22.0 by 0.8-0.6 mm and 15.0 by 0.6-0.4 mm, proboscis 284.8 by 227.6 micro m and 524.9 by 151.4 micro m, proboscis sheath 1570.7 by 72.7 micro m and 751.9 by 280.4 micro m, lemnisci length 2566.7 and 1085.6, testis 2202.9-1860.5 by 737.0-575.7 micro m and 1033.8-981.1 by 463.1-351.6 micro m, cement glands 940.2 by 441.2 micro m and 610.0 by 369.1 micro m. 2. Morphology of female worms: Worms possessed 14-18 longitudinal rows, with 6-10 hooks per row and become smaller toward the base of proboscis. Each worm contained an uterine bell and uterus in the posterior portion and the eggs filled the body cavity. Body, approximately 14.0 - 51.0 mm by 0.7-0.5 - 2.2-1.4 mm, proboscis 466.1-268.9 micro m by 259.9-252.0 micro m, proboscis sheath 1550.7-506.0 by 298.8-231.1 micro m, lemnisci length 1325.7-473.1 micro m, eggs approximately 112.4 by 28.5 micro m - 51.7 by 14.0 micro m. In this present study, the acanthocephala collected in 'Changran-pickles' and 'Myungran-pickles' were identified as Echinorhynchus gadi by morphological features.
Collapse
Affiliation(s)
- J T Kim
- Department of Parasitology, College of Veterinary Medicine, Seoul National University, Suwon 441-744, Korea
| | | | | | | | | | | | | |
Collapse
|
18
|
|
19
|
Abstract
Ionophorous antibiotics have been popularly used in the treatment of avian coccidiosis. Tissue residue of these antibiotics may be found in poultry, we have sought safe alternative anticoccidial herbal materials for the control of avian coccidiosis. Efficacy of extracts from 15 different herbs, including Bupleurum chinese DC, Sophora flavescens Aiton, and Artemisia annua Linne was tested against Eimeria tenella. One-day-old broiler chicks were infected with a USDA reference book of E. tenella, and administered various herbal extracts. Survival rates, lesion scores, body weight gains, bloody diarrhea, and oocysts excretions were investigated at the first and the second week after infection. Bloody diarrhea in the S. flavescens and Sinomenium acutum treated groups was milder than that of the other infected groups. Survival rates in the groups treated with Ulmus macrocarpa (100%), Pulsatilla koreana, Torilis japonica, Artemisia asiatica and S. flavescens (90%) were higher than that of the infected control group (70%). Lesion scores in the groups treated with U. macrocarpa (1.40+/-1.14) or Pulsatilla koreana (1.60+/-1.82) were significantly lower than those of the infected control group (3.00+/-1.10). During the first week after infection, the weight gains in the groups treated with Quisqualis indica (232.9+/-43.5 g), S. flavescens (214.4+/-46.1 g) and S. acutum (211.3+/-29.4 g) were significantly higher than the infected control group (172.4+/-17.6 g). In conclusion, the data of the survival rates, bloody diarrhea symptoms, lesion scores, body weight gains and oocyst excretions indicate that the extract of S. flavescens was the most effective. P. koreana, S. acutum, U. macrocarpa and Q. indica were also effective. Further research on the above herbal materials will be carried out by the authors by chemical analysis of the extracts.
Collapse
Affiliation(s)
- H J Youn
- College of Veterinary Medicine, Seoul National University, 441-744, Suweon, South Korea.
| | | |
Collapse
|
20
|
Abstract
MAGE-1, which was originally identified by reacting with cytolytic T lymphocytes derived from the blood of melanoma patients, is a member of a gene family consisting of 17 structurally related genes. The MAGE genes are expressed only in the testis among normal tissues and in a number of human tumors of various histological types. Murine MAGE (also called SMAGE or Mage) genes were found in a study aimed at detecting mouse genes homologous to human MAGE genes. However, the biological functions of MAGE and Mage are currently unknown. To understand the biological functions of Mage, in the present study a recombinant SMAGE2 (Mage-b2) protein of 43 kDa was produced and monoclonal antibodies reactive with Mage-b2 protein were generated. One monoclonal antibody, smpG4A, specifically recognized a 43 kDa protein in lysates of Mage-b2 mRNA-positive sarcoma cells and of the testis. Immunohistochemistry showed that Mage-b2 is located in the nucleus of Mage-b2 mRNA-positive sarcoma cells. These results should contribute to understanding the biological functions of Mage.
Collapse
Affiliation(s)
- J H Lee
- Department of Biology, Changwon National University, Korea
| | | | | | | |
Collapse
|
21
|
Abstract
With technical advancements, including high frequency, multiplane transducers, digital acquisition and display, and left-sided contrast agents, TEE is emerging as a promising method for evaluating coronary artery disease. Visualization of proximal coronary artery stenoses and coronary artery anomalies is already possible. Research studies using TEE measurement have contributed to understanding coronary artery physiology and may prove to be a valuable clinical tool in the future.
Collapse
Affiliation(s)
- H J Youn
- Division of Cardiology, Department of Internal Medicine, College of Medicine, Catholic University of Korea, St. Mary's Hospital, Seoul, Korea.
| | | |
Collapse
|
22
|
Jeon HK, Youn HJ, Yoo KD, Park JW, Kim HY, Rhim HY, Chae JS, Kim JH, Choi KB, Hong SJ. Transthoracic echocardiographic demonstration of massive pulmonary thrombus caused by protein C deficiency. J Am Soc Echocardiogr 2000; 13:682-4. [PMID: 10887354 DOI: 10.1067/mje.2000.104648] [Citation(s) in RCA: 3] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Few cases of pulmonary embolism detected by transthoracic echocardiography (TTE) have been reported. We present a case of a patient affected by pulmonary embolism caused by protein C deficiency. Transthoracic echocardiography showed a thrombus in transit (ie, visualization of a thrombus within the pulmonary artery). A hypercoagulable state caused by deficiency of protein C is a rare cause of pulmonary thromboembolism. Our experience demonstrates a massive pulmonary thrombus resulting from such a deficiency. Transthoracic echocardiography should be considered as the first diagnostic method for patients with suspected pulmonary embolism.
Collapse
Affiliation(s)
- H K Jeon
- Division of Cardiology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | | | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Abstract
To assess the histological response and the reinforcing effects of bone ingrowth within porous hydroxyapatite (HA) implants depending on pore geometry, four kinds of cylindrical-type with parallel linear pores phi50, 100, 300, 500 microm), one kind of sponge-type with irregular interconnecting pores (phi250 microm) and one cross-type with crossing linear pores (phi100 x 120 microm) of porous HA were prepared. Eighty-four rabbits were divided into six groups, and a 5 x 5 x 7 mm sized porous HA block was inserted through the medial cortical window of the proximal tibia. Histomorphological changes were examined using light and scanning electron microscopy. A biomechanical compression test was performed using material test machines. After implantation, the implants showed different histological changes depending on pore geometry. Active osteoconduction was also found in the phi50 microm sized cylindrical-type porous HA. Evidence of remodeling of new bone and bone marrow formation within porous HA was found in the larger cylindrical-types (phi300, 500 microm), and the sponge- and cross-types. The biomechanical test showed that the ultimate compressive strength increased significantly in the phi300 microm sized cylindrical-type, and in the sponge- and cross-types eight weeks after implantation. Porous HA with cylindrical pores could be a useful graft material due to its strength, osteoconductivity and the ease with which its pore geometry can be controlled.
Collapse
Affiliation(s)
- B S Chang
- Department of Orthopedic Surgery, Seoul National University College of Medicine, Clinical Research Institute, Seoul National University Hospital, South Korea
| | | | | | | | | | | | | |
Collapse
|
24
|
Ha PS, Youn HJ, Jung HS, Hong KS, Park YH, Ko KH. Anatase-Rutile Transition of Precipitated Titanium Oxide with Alcohol Rinsing. J Colloid Interface Sci 2000; 223:16-20. [PMID: 10684665 DOI: 10.1006/jcis.1999.6607] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The effect of alcohol washing on the anatase-rutile transition of precipitated titanium oxide was investigated using X-ray powder diffraction, Fourier-transform IR spectroscopy, and thermogravimetry. Alcohol (butanol) rinsing accelerated the anatase-rutile transition of precipitated titanium oxide powder so that the onset temperature of transition decreased drastically from 800 degrees C for water-washed powder to 550 degrees C for alcohol-rinsed powder. Alternation of transition kinetics and mechanisms by rinsing media could be confirmed from the analysis of temperature and time dependence of rutile content. The attributability of the chemical state of anatase after crystallization, which contained H(2)O, OH, and organic residues, to the change of transition kinetics with alcohol rinsing will be discussed. Two mechanisms, the effect of residual organics and/or H(2)O(OH), could be suggested on the basis of analysis of the difference between chemical states of water-washed anatase and alcohol-rinsed powder. Copyright 2000 Academic Press.
Collapse
Affiliation(s)
- PS Ha
- School of Material Science and Engineering, Seoul National University, Seoul, Korea
| | | | | | | | | | | |
Collapse
|
25
|
Lee JH, Kim HW, Kwon YB, Kang MS, Choi DW, Na JH, Kwon OK, Youn HJ, Han HJ, Byun TH, Park SY, Chun BH, Pyun JH, An GH, Lee YJ, Cho MH. General pharmacology studies on beta-domain deleted recombinant factor VIII. Arzneimittelforschung 2000; 50:86-92. [PMID: 10683720 DOI: 10.1055/s-0031-1300170] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
beta-Domain deleted recombinant factor VIII (GC-rAHF), newly developed by Korea Green Cross Co., is a novel therapeutic for hemophiliacs and is currently under clinical evaluation. The general pharmacological properties of this drug were evaluated using mice, rats, guinea pigs and rabbits. Intravenous doses of 5 to 500 IU/kg were assayed in several tests to analyze their effects in vivo on various systems. The effect of the substance under study was also tested in vitro on isolated guinea pig ileum preparations at final concentrations of 5 to 50 IU/kg. The result of this study showed that GC-rAHF did not affect general behavior in the Irwin test. Similarly the drug was not found to affect neither normal body temperature nor the spontaneous activity in mice. In addition, it was not found to induce pharmacologically significant alterations of the cardiovascular and respiratory parameters in rats. No effects were observed either in the pentobarbital sodium-induced sleep-induction time and duration, in writhing test or in the test of pentetrazole-induced convulsion. Finally, the tested drug did not modify the gastrointestinal motility, acetylcholine or histamine-induced contraction of the isolated guinea pig ileum, nor gastric secretion. The results demonstrated that GC-rAHF has no effects on the central nervous, cardiovascular, respiratory and digestive systems in the doses of 5, 50 and 500 IU/kg in vivo and 5, 10, 50 and 100 IU/kg in vitro.
Collapse
Affiliation(s)
- J H Lee
- College of Veterinary Medicine, Seoul National University, Suwon, Korea
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Kim HY, Kim CJ, Rho TH, Youn HJ, Jin SW, Rhim HY, Park JW, Jeon HK, Chae JS, Kim JH, Hong SJ, Choi KB. Transesophageal echocardiographic detection of thoracic aortic plaque could noninvasively predict significant obstructive coronary artery disease. Korean J Intern Med 1999; 14:20-6. [PMID: 10461421 PMCID: PMC4531913 DOI: 10.3904/kjim.1999.14.2.20] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [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: 11/27/2022] Open
Abstract
OBJECTIVE Previous pathologic and roentgenographic studies have suggested a relation between aortic plaque and coronary artery disease but have lacked clinical utility. The study was undertaken to elucidate whether atherosclerotic aortic plaque detected by transesophageal echocardiography can be a clinically useful marker for significant obstructive coronary artery disease. METHODS Clinical and angiographic features and intraoperative transesophageal echocardiographic findings were prospectively analyzed in 131 consecutive patients (58 women and 73 men, aged 17 to 75 years [mean 54 +/- 12]) undergoing open heart surgery. Significant obstructive coronary artery disease was defined as > or = 50% stenosis of > or = 1 major branch. RESULTS Seventy-six (58%) of 131 patients were found to have obstructive coronary artery disease. In 76 patients with significant coronary artery disease, 71 had thoracic aortic plaque. In contrast, aortic plaque existed in only 10 of the remaining 55 patients with normal or minimally abnormal coronary arteries. The presence of aortic plaque on transesophageal echocardiographic studies had a sensitivity of 93%, a specificity of 82% and positive and negative predictive values of 88% and 90%, respectively, for significant coronary artery disease. There was a significant relationship between the degree of aortic intimal changes and the severity of coronary artery disease (r = 0.74, P < 0.0001). Multivariate logistic regression analysis of patient age, sex, risk factors of cardiovascular disease and transesophageal, echocardiographic findings revealed that atherosclerotic aortic plaque was the most significant independent predictor of coronary artery disease. CONCLUSION This study indicates that transesophageal echocardiographic detection of atherosclerotic plaque in the thoracic aorta is useful in the noninvasive prediction of the presence and severity of coronary artery disease.
Collapse
Affiliation(s)
- H Y Kim
- Department of Internal Medicine, College of Medicine, Catholic University of Korea, Seoul, Korea
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Abstract
In our present study, the effects of alcohol washing on the crystallization behavior of precipitated titanium oxide were investigated using Fourier-transformed infrared spectroscopy (FT-IR), thermogravimetry, differential scanning calorimetry, X-ray powder diffraction, and Raman spectroscopy. Alcohol rinsing of the precipitated titania powder having an amorphous hydrated form retarded its crystallization to the anatase phase. The crystallization temperature for 390 degrees C of nonrinsed (water-washed only) powder was increased to 467 degrees C with the alcohol rinse. The retardation was attributed to the formation of oxo-alkoxides on the particle surfaces. FT-IR analysis demonstrated that the alcohol-rinsed powder had a dehydration rate much lower than that of the nonrinsed powder as temperatures were increased. Therefore, it was suggested that the presence of oxo-alkoxides in the alcohol-rinsed powder decreased the dehydration rate, which, in turn, retarded crystallization to the anatase structure. Copyright 1999 Academic Press.
Collapse
Affiliation(s)
- HJ Youn
- School of Material Science & Engineering, Seoul National University, Seoul, 151-742, Korea
| |
Collapse
|
28
|
Abstract
In our present study, the phase transition behavior of gamma-alumina doped by an alumina-sol was explored using X-ray powder diffraction and transmission electron microscopy. It was found that the addition of an alumina-sol into gamma-alumina enabled the onset of the gamma- to alpha-alumina transformation at temperatures as low as 600 degreesC. This phenomenon was designated as the "sol-effect." Although the onset temperature of the phase transformation was very low, the transformation was completed at 1100 degreesC which is the same as that observed with the seeding method. Further investigation revealed that the transformation was composed of two steps. One occurs over the temperature region from 600 to 950 degreesC where a slow increase in the content of alpha-alumina is observed. The other is the region from 950 to 1100 degreesC where a rapid increase of alpha-alumina occurs due to "self-seeding." The "sol-effect" produces powders with very fine alpha-alumina particle sizes and little agglomeration. Copyright 1999 Academic Press.
Collapse
Affiliation(s)
- HJ Youn
- College of Engineering, Seoul National University, Seoul, 151-742, Korea
| | | | | | | |
Collapse
|
29
|
Youn HJ, Redberg RF, Schiller NB, Foster E. Demonstration of penetrating intramyocardial coronary arteries with high-frequency transthoracic echocardiography and Doppler in human subjects. J Am Soc Echocardiogr 1999; 12:55-63. [PMID: 9882779 DOI: 10.1016/s0894-7317(99)70173-2] [Citation(s) in RCA: 19] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Characterization of intramyocardial coronary artery flow may offer insight into the spectrum of coronary physiology. The purposes of this study were to test the feasibility of detection and measurement of intramyocardial coronary artery flow by using high-frequency transthoracic ultrasound and to evaluate the hemodynamic and morphologic differences in intramyocardial coronary arteries between patients with echocardiographically normal myocardium and patients with diseased myocardium. In 116 subjects (age 58 +/- 19 years; male:female 67:49; 58 normal [control subjects], 40 with left ventricular hypertrophy [LVH], 18 with systolic left ventricular dysfunction [cardiomyopathy, CM]), we examined the myocardium just beneath the apical impulse window at a depth of 3 to 5 cm by using a 6- or 7-MHz centerline frequency transducer. For color Doppler examination, a special preset coronary program with a low Nyquist limit (12 to 20 cm) was used. After obtaining linear color signals, the width and length, peak and mean diastolic pulsed Doppler flow velocities, diastolic velocity time integrals, and percent duration of diastolic Doppler flow were measured. The number of linear color flow signals per square centimeter was counted in 520 different cardiac cycles, and the angles formed by their inner curvature was measured with a graduated protractor. We identified color flow Doppler signals within the myocardium having a mean width of 1.1 +/- 0.4 mm and flow direction from epicardium to endocardium in 104 (89. 7%) subjects and spectral Doppler signals in 74 (63.8%) subjects. In 33 (45.8%) subjects, only diastolic flow was detected and in 39 (54. 2%) subjects, diastolic flow was predominant with systolic reversal. Peak and mean diastolic flow velocities and velocity time integrals of spectral Doppler signal in control subjects were 26.2 +/- 8.6 cm/s, 19.0 +/- 6.3 cm/s, and 9.5 +/- 2.7 cm, respectively. There were no significant differences in width and density of linear color flow signals among the 3 groups. The color flow signals in the LVH and CM groups had a narrower angle of inner curvature (P <.005 for LVH, P <.05 for CM, respectively), and their spectral Doppler signals showed significantly higher diastolic velocities and shorter diastolic flow duration (P <.005 for LVH, P <.05 for CM, respectively) than those of the control subjects. Detection and measurement of flow signals consistent with penetrating intramyocardial coronary arteries are feasible in a high percentage of subjects by use of high-frequency transthoracic ultrasound. The findings in patients with LVH and CM suggest that there are distinct hemodynamic and morphologic departures from those with normal left ventricles that may be a consequence of disordered myocardial perfusion in diseased myocardium.
Collapse
Affiliation(s)
- H J Youn
- Adult Echocardiographic Laboratory, Cardiovascular Research Institute, University of California, San Francisco, 94143-0214, USA
| | | | | | | |
Collapse
|
30
|
Youn HJ, Rokosh G, Lester SJ, Simpson P, Schiller NB, Foster E. Two-dimensional echocardiography with a 15-MHz transducer is a promising alternative for in vivo measurement of left ventricular mass in mice. J Am Soc Echocardiogr 1999; 12:70-5. [PMID: 9882781 DOI: 10.1016/s0894-7317(99)70175-6] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Murine models of left ventricular (LV) hypertrophy recently have been developed. We tested the accuracy of 2-dimensional (2D) echocardiographic measurement of LV mass with high-frequency imaging in mice. Ten anesthetized mice (weight 20 to 31 g, aged 1 to 5 months) were examined with a 15-MHz transthoracic linear-array transducer. End-diastolic myocardial area (A)(epicardial - endocardial) from the parasternal short-axis view at the midpapillary level and LV length (L) from the parasternal long-axis view were measured to calculate LV mass with the area-length method (1.05 [5/6 x A x L]) and data were compared with LV-mass with the 2D guided M-mode method. Within 3 days of echocardiography, the hearts were removed and weighed after potassium-induced cardiac arrest. Two-dimensional echocardiographic measurement with a 15-MHz transducer was performed in all mice. LV chamber dimensions included end-diastolic septal (0.80 +/- 0.12 mm) and posterior wall thickness (0.76 +/- 0.13 mm), end-diastolic dimension (3.64 +/- 0.28 mm), and end-systolic dimension (2.34 +/- 0.32 mm). Echocardiographic LV mass with the area-length method, 2D guided M-mode method, and autopsy LV weight were 80.8 +/- 16.1 mg, 97.6 +/- 17.8 mg, and 78.8 +/- 13.2 mg, respectively. A strong correlation existed between LV weight (x ) and echocardiographic LV mass (y ) with the area-length method: y = 0.745x + 18.9, r =0.908, standard error of estimate (SEE) = 5.9 mg, P <.0005. This correlation was stronger than that of LV weight (x ) and echocardiographic LV mass (y ) with the 2D guided M-mode method: y = 0.577x + 22.6, r =0.779, SEE = 8.8 mg, P =.008. These data suggest that serial in vivo measurements of LV mass with the 2D area-length method may be more accurate than M-mode methods in experimental murine models of LV pathology.
Collapse
Affiliation(s)
- H J Youn
- Adult Echocardiographic Laboratory, Cardiovascular Research Institute, University of California, San Francisco, 94143-0214, USA
| | | | | | | | | | | |
Collapse
|
31
|
Park JH, Chang SH, Kim MC, Shin SH, Youn HJ, Kim JK, Jang YS, Kim CW. Up-regulation of the expression of major histocompatibility complex class I antigens by plasmid DNA transfection in non-hematopoietic cells. FEBS Lett 1998; 436:55-60. [PMID: 9771893 DOI: 10.1016/s0014-5793(98)01097-7] [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: 11/18/2022]
Abstract
The effect of DNA on the surface expression of major histocompatibility (MHC) class I antigens was examined in non-hematopoietic tumor cell lines. Transfection with plasmid DNA via liposome or electroporation significantly increased the surface expression of MHC class I molecules in a transient manner. Northern blot analysis showed that levels of MHC class I mRNA were increased by DNA transfection, probably via transcriptional activation. In contrast, the expression of the MHC class II and beta-actin genes was not affected, suggesting that the up-regulation of MHC class I expression by plasmid DNA works in a gene-specific manner.
Collapse
Affiliation(s)
- J H Park
- Department of Biology, Changwon National University, Kyungnam, South Korea.
| | | | | | | | | | | | | | | |
Collapse
|
32
|
Affiliation(s)
- H J Youn
- Department of Internal Medicine, The Catholic University of Korea, Seoul
| | | | | | | |
Collapse
|
33
|
Yu J, Choi SY, Moon KD, Chung HH, Youn HJ, Jeong S, Park H, Schultz PG. A glycosidase antibody elicited against a chair-like transition state analog by in vitro immunization. Proc Natl Acad Sci U S A 1998; 95:2880-4. [PMID: 9501184 PMCID: PMC19663 DOI: 10.1073/pnas.95.6.2880] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [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: 02/06/2023] Open
Abstract
Antibodies were generated against the positively charged chair-like glycosidase inhibitor nojirimycin by in vitro immunization. A number of catalytic antibodies were isolated, one of which catalyzes the hydrolysis of p-nitrophenyl beta-D-glucopyranoside 3 with a rate enhancement (kcat/kuncat) of 10(5) M over the HOAC-catalyzed reaction. The antibody discriminates modifications in the pyranoside ring of substrate 3 at the C2, C4, and the anomeric positions. The pH dependence of the reaction and chemical modification studies suggest the presence of an active-site Asp or Glu residue that may function as a general acid. This study further defines those requirements necessary to generate antibodies that efficiently cleave glycosidic bonds.
Collapse
Affiliation(s)
- J Yu
- Division of Applied Science, The Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul 131-791 Korea
| | | | | | | | | | | | | | | |
Collapse
|
34
|
Youn HJ, Terpetschnig E, Szmacinski H, Lakowicz JR. Fluorescence energy transfer immunoassay based on a long-lifetime luminescent metal-ligand complex. Anal Biochem 1995; 232:24-30. [PMID: 8600827 PMCID: PMC6907077 DOI: 10.1006/abio.1995.9966] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.3] [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: 01/31/2023]
Abstract
We describe an immunoassay based on fluorescence resonance energy transfer (FRET). The antigen was human serum albumin (HSA), which was labeled with a ruthenium-ligand complex, [Ru(bpy)2(phen-ITC)]2+. The antibody (IgG) to HSA was labeled with a nonfluorescent absorber, Reactive Blue 4. Association of the Ru-labeled HSA with the antibody was detected by three spectral parameters, a decreased quantum yield of Ru-HSA, a decrease in its fluorescence lifetime, and an increase in its fluorescence anisotropy. The steady-state anisotropy of Ru-HSA increased approximately eightfold upon binding to the antibody. These spectral effects were observed both in the direct association of the Ru-HSA with Reactive Blue 4-labeled antibody, and in a competitive assay format wherein unlabeled HSA competed with Ru-HSA for the binding sites on the antibody. Some nonspecific interactions of HSA may have occurred with Reactive Blue 4-labeled AHA, a difficulty which can be avoided with a different acceptor. The use of FRET provides a reliable means to alter the spectral properties upon antigen-antibody binding. The advantages of a ruthenium-ligand fluorophore include its long-wavelength absorption and emission, long fluorescence lifetime, and high photo-stability. Long wavelengths minimize problems of autofluorescence from biological samples, and long life-times allow off-gating of the prompt autofluorescence.
Collapse
Affiliation(s)
- H J Youn
- Department of Biological Chemistry, University of Maryland School of Medicine, Baltimore 21201, USA
| | | | | | | |
Collapse
|
35
|
Abstract
In order to survey the prevalence of Buxtonella sulcata in Kyonggi-do in 1984 and 1994, the feces of cattle were collected and examined. Of 792 cattle in 1984 and 293 in 1994, cysts of B. sulcata were detected from 266 (33.6%) and 101 (34.5%) cattle respectively. The positive rates were 85.9% and 64.2% in breeder cattle, 44.8% and 9.4% in dairy cattle, 7.5% and 14.9% in Korean cattle and 1.8% in beef cattle. In spring, the cyst positive rates were 62.5% in 1984 and 27.8% in 1994; 20.1% and 66.7% in summer; 21.3% and 0% in autumn; and 34.8% and 64.6% in winter. More cattle, 69.1% (184) and 55.5% (56) in 1984 and 1994, had diarrhea among the cyst positive cattle than those of cyst negative, 37.6% (198) and 32.3% (62).
Collapse
Affiliation(s)
- K O Hong
- Department of Veterinary Parasitology, College of Veterinary Medicine, Seoul National University, Suwon, Korea
| | | |
Collapse
|
36
|
Lee WH, Banan M, Harriss JV, Hwang I, Woodward E, Youn HJ, Gottlieb PD. Cis-acting DNA elements and cell type-specific nuclear proteins which may play a role in regulation of mouse CD8 alpha (Lyt-2) gene transcription. Int Immunol 1994; 6:1307-21. [PMID: 7819139 DOI: 10.1093/intimm/6.9.1307] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [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: 01/27/2023] Open
Abstract
Fusion of mouse CD8+ class I MHC-restricted T cells with the BW5147 thymoma invariably yields CD8- hybridomas in which RNA transcribed from the CD8 alpha (Lyt-2) gene is undetectable. To determine whether cis-acting DNA sequences may negatively regulate transcription of the Lyt-2 gene in BW5147 cells, one possible explanation for the above observation, BW5147 cells were stably transfected with the Lyt-2 gene containing 1 - 11,000 nucleotides of 5' flanking DNA and surface expression of Lyt-2 was monitored by flow microfluorometry. Initial results suggested the presence of a negative element between 1400 and 5000 nucleotides upstream of the site of transcription initiation. Further studies suggested the presence of two potential negative regulatory elements in this region, one of which includes a 269 nucleotide Accl - SstI fragment comprised of nucleotides -4700 to -4431 which bound nuclear proteins from CD8+ and CD8- cell lines in electrophoretic mobility shift assays (EMSA). EMSA studies performed using nuclear extracts from a variety of cell lines and tissues demonstrated that unique retarded complexes, called bands 1 and 2, correlated significantly with expression or non-expression of Lyt-2 respectively. EMSA analysis of proteins fractionated by SDS-PAGE from nuclear extract of the CD8+ VL3 T lymphoma cell line revealed proteins of approximately 110-130 kDa (called L2a-P1) and > 200 kDa (called L2a-P2) which bind within a 100 nucleotide region of this fragment (called L2a) to yield band 1 and 2 respectively, and which may play a role in regulation of Lyt-2 gene transcription.
Collapse
Affiliation(s)
- W H Lee
- Department of Microbiology, University of Texas at Austin 78712
| | | | | | | | | | | | | |
Collapse
|
37
|
Robey EA, Ramsdell F, Gordon JW, Mamalaki C, Kioussis D, Youn HJ, Gottlieb PD, Axel R, Fowlkes BJ. A self-reactive T cell population that is not subject to negative selection. Int Immunol 1992; 4:969-74. [PMID: 1390439 DOI: 10.1093/intimm/4.9.969] [Citation(s) in RCA: 26] [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: 12/26/2022] Open
Abstract
In male mice expressing a transgenic alpha beta TCR which recognizes a male antigen (HY), T cells which do not express normal levels of CD8 escape thymic deletion and appear in the periphery. These consist of two distinct populations, one which lacks expression of both CD4 and CD8, and one with low levels of CD8. Neither population has anti-HY reactivity, consistent with the known requirement of this TCR for CD8. We now describe the consequences of expression of both the anti-HY TCR transgene and a constitutive CD8.1 transgene on T cells of male mice. Peripheral T cells in these male 'double transgenic' mice express both the anti-HY TCR and normal levels of CD8, and can proliferate to male antigen in vitro. These cells do not express the endogenous allele of CD8 (CD8.2), suggesting that the increase in CD8 levels due to the CD8.1 transgene leads to the deletion of the CD8.2low population. In contrast, the CD8.1 transgene does not lead to the deletion of the CD8.2- population. This implies that, unlike the majority of alpha beta T cells, TCR+CD4-CD8- cells in TCR transgenic mice are not subject to deletion.
Collapse
Affiliation(s)
- E A Robey
- Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY 10032
| | | | | | | | | | | | | | | | | |
Collapse
|
38
|
Youn HJ, Harriss JV, Gottlieb PD. Nucleotide sequence analysis of the C.AKR Lyt-2a gene: structural polymorphism in alleles encoding the Lyt-2.1 T-cell surface alloantigen. Immunogenetics 1988; 28:345-52. [PMID: 3267233 DOI: 10.1007/bf00364233] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [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: 01/05/2023]
Abstract
The Lyt-2a allele of the C.AKR strain of mice (genotype Lyt-2a, Lyt-3a) was cloned, and its complete nucleotide sequence as well as that of 2 kb of 5' flanking DNA was determined. The sequence was compared with the partial sequence of the Lyt-2a allele of DBA/2 (genotype Lyt-2a, Lyt-3b) and the nearly complete sequence of the B10.CAS2 Lyt-2b allele reported by Liaw and coworkers (1986). The coding regions of the two Lyt-2a alleles differ from each other by two nucleotide substitutions in the three exons over which they could be compared, resulting in two amino acid substitutions in the leader and transmembrane segments. The coding region of the C.AKR Lyt-2a allele differs from the Lyt-2b allele by two nucleotide substitutions in the extracellular V-like domain, one of which is silent and the second of which leads to substitution of valine for methionine at amino acid position 78 giving rise to the Lyt-2.1 allotypic specificity. The coding region of the DBA/2 Lyt-2a allele shares with C.AKR the allotypic substitution at position 78 and differs from Lyt-2b by three additional nucleotide substitutions in the coding regions, two of which lead to amino acid substitutions in the leader and transmembrane segments. It would therefore appear that the Lyt-2 alleles of the three strains analyzed are distinct, and the nomenclature Lyt-2a1 and Lyt-2a2 is suggested to distinguish the alleles of C.AKR and DBA/2, respectively. These alleles share a common difference from the Lyt-2b gene product at position 78, and since the amino acid substitutions which distinguish them from each other are in the leader and transmembrane segments, their mature Lyt-2 gene products appear antigenically identical.
Collapse
Affiliation(s)
- H J Youn
- Department of Microbiology, University of Texas, Austin 78712
| | | | | |
Collapse
|
39
|
Abstract
The mouse Lyt-3a gene, which encodes the Lyt-3.1 T-cell surface alloantigen of the C.AKR strain, has been cloned, and the nucleotide sequence of its exons and more than 2 kb of 5' flanking sequence have been determined. The gene extends over approximately 16 kb of DNA and consists of six exons encoding leader, leader plus V-like domain, membrane-proximal, transmembrane, and cytoplasmic domains. The only difference between the coding region of the Lyt-3a gene and the cDNA sequences reported for Lyt-3b (Nakauchi et al. 1987. Panaccio et al. 1987) is at position 77 of the mature protein where Lyt-3a encodes serine and Lyt-3b encodes arginine. This substitution must therefore be the basis for the serological distinction between the Lyt-3.1 and Lyt-3.2 alloantigens. Potential TATA and CAAT sequences, two Sp1 protein binding sites, two extended repeats of the dinucleotide, CA, a number of short inverted repeats, and an inverted segment of the mouse B1 repetitive sequence are found 5' to the Lyt-3a gene. Two consensus poly-A addition signals and a complete copy of the mouse B1 sequence are found 3' to the gene. Both B1-related regions are flanked by short direct repeats suggesting that they arose by an insertional mechanism. Cotransfection of the Lyt-3a gene together with a cloned Lyt-2a gene resulted in expression of both Lyt-2 and Lyt-3.1 on the surface of Ltk- and BW5147 cells.(ABSTRACT TRUNCATED AT 250 WORDS)
Collapse
Affiliation(s)
- H J Youn
- Department of Microbiology, University of Texas, Austin 78712
| | | | | |
Collapse
|