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VanBik D, Lee SH, Seo MG, Jeon BR, Goo YK, Park SJ, Rhee MH, Kwon OD, Kim TH, Geraldino PJL, Kwak D. Borrelia Species Detected in Ticks Feeding on Wild Korean Water Deer (Hydropotes inermis) Using Molecular and Genotypic Analyses. J Med Entomol 2017; 54:1397-1402. [PMID: 28549151 DOI: 10.1093/jme/tjx106] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Indexed: 06/07/2023]
Abstract
Lyme borreliosis is a vector-borne disease transmitted through the bite of ticks infected by Borrelia burgdorferi sensu lato group, including B. burgdorferi sensu stricto, B. afzelii, and B. garinii. The goal of the present study was to detect Borrelia species in ticks infesting wild Korean water deer (KWD; Hydropotes inermis Swinhoe), using molecular and genotypic analyses. In total, 48 ticks were collected from KWD, all of which were morphologically identified as Haemaphysalis longicornis Neumann that is dominant in Korea. Nested PCR was performed to detect the Borrelia-specific 5S (rrf)-23S (rrl) intergenic spacer region and the outer surface protein A (ospA) genes in ticks. Both rrf-rrl and ospA were amplified from one of the 48 ticks (2.1%) and were identified as B. afzelii. To our knowledge, this study constitutes the first molecular detection of B. afzelii in Haemaphysalis ticks in Korea. Because B. afzelii is a zoonotic tick-borne pathogen, understanding the molecular characteristics of this bacterium is important for preventing the transmission of Borrelia from ticks to other animals and humans.
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Affiliation(s)
- D VanBik
- College of Veterinary Medicine, Kyungpook National University, Daegu, Korea
| | - S H Lee
- College of Veterinary Medicine, Kyungpook National University, Daegu, Korea
- Animal and Plant Quarantine Agency, Gimcheon, Gyeongbuk, Korea
| | - M G Seo
- College of Veterinary Medicine, Kyungpook National University, Daegu, Korea
- Animal and Plant Quarantine Agency, Gimcheon, Gyeongbuk, Korea
| | - B R Jeon
- College of Veterinary Medicine, Kyungpook National University, Daegu, Korea
| | - Y K Goo
- Department of Parasitology and Tropical Medicine, Kyungpook National University School of Medicine, Daegu, Korea
| | - S J Park
- College of Veterinary Medicine, Kyungpook National University, Daegu, Korea
| | - M H Rhee
- College of Veterinary Medicine, Kyungpook National University, Daegu, Korea
| | - O D Kwon
- College of Veterinary Medicine, Kyungpook National University, Daegu, Korea
| | - T H Kim
- College of Veterinary Medicine, Kyungpook National University, Daegu, Korea
| | - P J L Geraldino
- Department of Biology, College of Arts and Sciences, University of San Carlos, Cebu, Philippines
| | - D Kwak
- College of Veterinary Medicine, Kyungpook National University, Daegu, Korea
- Cardiovascular Research Institute, Kyungpook National University, Daegu, Korea
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Min JY, Kim HI, Park SJ, Lim H, Song JH, Byon HJ. Adequate interval for the monitoring of vital signs during endotracheal intubation. BMC Anesthesiol 2017; 17:110. [PMID: 28830366 PMCID: PMC5568307 DOI: 10.1186/s12871-017-0399-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 08/13/2017] [Indexed: 11/18/2022] Open
Abstract
Background In the perioperative period, it may be inappropriate to monitor vital signs during endotracheal intubation using the same interval as during a hemodynamically stable period. The aim of the present study was to determine whether it is appropriate to use the same intervals used during the endotracheal intubation and stable periods to monitor vital signs of patients under general anesthesia. Methods The mean arterial pressure (MAP) and heart rate (HR) were continuously measured during endotracheal intubation (15 min after intubation) and hemodynamically stable (15 min before skin incision) periods in 24 general anesthesia patients. Data was considered “unrecognized” when continuously measured values were 30% more or less than the monitored value measured at 5- or 2.5-min intervals. The incidence of unrecognized data during endotracheal intubation was compared to that during the hemodynamically stable period. Result There were significantly more unrecognized MAP data measured at 5-min intervals during endotracheal intubation than during the hemodynamically stable period (p value <0.05). However, there was no difference in the incidence of unrecognized MAP data at 2.5 min intervals or HR data at 5 or 2.5 min intervals between during the endotracheal intubation and hemodynamically stable periods. Conclusion A 5-min interval throughout the operation period was not appropriate for monitoring vital signs. Therefore, , a 2.5-min interval is recommended for monitoring the MAP during endotracheal intubation.
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Affiliation(s)
- J Y Min
- Department of Anesthesiology and Pain Medicine, Severance Hospital, Anesthesia and Pain Research Institute, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 120-752, Republic of Korea
| | - H I Kim
- Department of Anesthesiology and Pain Medicine, Severance Hospital, Anesthesia and Pain Research Institute, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 120-752, Republic of Korea
| | - S J Park
- Department of Anesthesiology and Pain Medicine, Severance Hospital, Anesthesia and Pain Research Institute, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 120-752, Republic of Korea
| | - H Lim
- Department of Anesthesiology and Pain Medicine, Inha University College of Medicine, Incheon, Republic of Korea
| | - J H Song
- Department of Anesthesiology and Pain Medicine, Inha University College of Medicine, Incheon, Republic of Korea
| | - H J Byon
- Department of Anesthesiology and Pain Medicine, Severance Hospital, Anesthesia and Pain Research Institute, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 120-752, Republic of Korea.
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Park SJ, Kim Y, Jang SY. The application of an acellular dermal allograft (AlloDerm) for patients with insufficient conjunctiva during evisceration and implantation surgery. Eye (Lond) 2017; 32:136-141. [PMID: 28799557 DOI: 10.1038/eye.2017.161] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Accepted: 07/03/2017] [Indexed: 12/13/2022] Open
Abstract
PurposeTo describe the use of an acellular dermal allograft (AlloDerm) for patients with insufficient conjunctiva during evisceration and implantation surgery.Patients and methodsThe medical records of six patients with insufficient conjunctiva during evisceration surgery were reviewed. It was not possible to close the Tenon's capsule and conjunctiva without wound tension in these patients, so AlloDerm was placed over the sclera, and the edges were sutured with adjacent conjunctiva without tension. The size of the bare AlloDerm graft was measured in all patients. The clinical outcome was the incidence of complications, and the percentage of patients needing additional surgery was also recorded.ResultsThe cause of evisceration was end stage glaucoma (four patients) and endogenous endophthalmitis (two patients). All six eyes of six patients (100%) had a successful outcome showing no complications. Four cases achieved full conjunctivalisation over the bare AlloDerm graft. Two cases had a bare AlloDerm until the last follow-up, but showed no implant exposure. It took a median of 11 weeks for the slow advance of the conjunctival edge to entirely cover the AlloDerm graft.ConclusionsAlloDerm is a promising material for covering sclera and implants in a tension-free manner after evisceration surgery in patients with insufficient conjunctiva.
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Affiliation(s)
- S J Park
- College of medicine, Soonchunhyang University, Cheonan, Korea
| | - Y Kim
- Department of Ophthalmology, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - S Y Jang
- Department of Ophthalmology, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea
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Park SJ, Kim AR, Hong JT, Park JY, Lee S, Ahn YH. Crystallization Kinetics of Lead Halide Perovskite Film Monitored by In Situ Terahertz Spectroscopy. J Phys Chem Lett 2017; 8:401-406. [PMID: 28050908 DOI: 10.1021/acs.jpclett.6b02691] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Vibrational modes in the terahertz (THz) frequency range are good indicators of lead halide perovskite's crystallization phase. We performed real-time THz spectroscopy to monitor the crystallization kinetics in the perovskite films. First, THz absorptance was measured while the perovskite film was annealed at different temperatures. By analyzing the Avrami exponent, we observed an abrupt dimensionality switch (from 1D to 2D) with increasing temperature starting at approximately 90 °C. We also monitored the laser-induced crystallinity enhancement of the preannealed perovskite film. The THz absorptance increased initially, then subsequently decayed over a couple of hours, although the enhancement factor varies depending on the film crystallinity. In particular, the Avrami analysis implied that the light-induced crystallization was assisted by the 1D diffusion processes. The activation photon energy was measured at 2.3 eV, which indicated that enhanced crystallization originated from the photoinduced structural change of residual lead iodide at the grain boundary.
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Affiliation(s)
- S J Park
- Department of Physics and Department of Energy Systems Research, Ajou University , Suwon 16499, Korea
| | - A R Kim
- Department of Physics and Department of Energy Systems Research, Ajou University , Suwon 16499, Korea
| | - J T Hong
- Department of Physics and Department of Energy Systems Research, Ajou University , Suwon 16499, Korea
| | - J Y Park
- Department of Physics and Department of Energy Systems Research, Ajou University , Suwon 16499, Korea
| | - S Lee
- Department of Physics and Department of Energy Systems Research, Ajou University , Suwon 16499, Korea
| | - Y H Ahn
- Department of Physics and Department of Energy Systems Research, Ajou University , Suwon 16499, Korea
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Kim MY, Park SJ, Shim JW, Song YJ, Yang K, Park SJ, Heo K. Accumulation of low-dose BIX01294 promotes metastatic potential of U251 glioblastoma cells. Oncol Lett 2017; 13:1767-1774. [PMID: 28454322 DOI: 10.3892/ol.2017.5626] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Accepted: 09/05/2016] [Indexed: 12/13/2022] Open
Abstract
BIX01294 (Bix) is known to be a euchromatic histone-lysine N-methyltransferase 2 inhibitor and treatment with Bix suppresses cancer cell survival and proliferation. In the present study, it was observed that sequential treatment with low-dose Bix notably increases glioblastoma cell migration and metastasis. It was demonstrated that U251 cells sequentially treated with low-dose Bix exhibited induced characteristic changes in critical epithelial-mesenchymal transition (EMT) markers, including E-cadherin, N-cadherin, β-catenin and zinc finger protein SNAI2. Notably, sequential treatment with Bix also increased the expression of cancer stem cell-associated markers, including sex determining region Y-box 2, octamer-binding transcription factor 4 and cluster of differentiation 133. Neurosphere formation was significantly enhanced in cells sequentially treated with Bix, compared with control cells (control: P=0.011; single treatment of Bix, P=0.045). The results of the present study suggest that accumulation of low-dose Bix enhanced the migration and metastatic potential of glioblastoma cells by regulating EMT-associated gene expression, which may be the cause of the altered properties of glioblastoma stem cells.
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Affiliation(s)
- Min Young Kim
- Research Center, Dongnam Institute of Radiological and Medical Science (DIRAMS), Busan 619-953, Republic of Korea.,Department of Molecular Biology, College of Natural Sciences, Pusan National University, Busan 609-735, Republic of Korea
| | - Shin-Ji Park
- Research Center, Dongnam Institute of Radiological and Medical Science (DIRAMS), Busan 619-953, Republic of Korea
| | - Jae Woong Shim
- Research Center, Dongnam Institute of Radiological and Medical Science (DIRAMS), Busan 619-953, Republic of Korea
| | - Yu Jin Song
- Research Center, Dongnam Institute of Radiological and Medical Science (DIRAMS), Busan 619-953, Republic of Korea
| | - Kwangmo Yang
- Research Center, Dongnam Institute of Radiological and Medical Science (DIRAMS), Busan 619-953, Republic of Korea.,Department of Radiation Oncology, Dongnam Institute of Radiological and Medical Sciences (DIRAMS), Busan 619-953, Republic of Korea.,Department of Radiation Oncology, Korea Institute of Radiological and Medical Sciences, Seoul 13557, Republic of Korea
| | - Seong-Joon Park
- Research Center, Dongnam Institute of Radiological and Medical Science (DIRAMS), Busan 619-953, Republic of Korea
| | - Kyu Heo
- Research Center, Dongnam Institute of Radiological and Medical Science (DIRAMS), Busan 619-953, Republic of Korea
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Lee HK, Kim DS, Jeon YL, Yoon HN, Lee JH, Park SJ. Lepidopterous Insects Composition in Jindo Island, Korea in Summer. Animal Systematics, Evolution and Diversity 2016. [DOI: 10.5635/ased.2016.sin9.044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Park HJ, Lee SY, Choi YJ, Hong HP, Park SJ, Park JH, Kim E. 3D isotropic T2-weighted fast spin echo (VISTA) versus 2D T2-weighted fast spin echo in evaluation of the calcaneofibular ligament in the oblique coronal plane. Clin Radiol 2016; 72:176.e1-176.e7. [PMID: 27836104 DOI: 10.1016/j.crad.2016.09.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2016] [Revised: 09/02/2016] [Accepted: 09/15/2016] [Indexed: 11/30/2022]
Abstract
AIM To investigate whether the image quality of three-dimensional (3D) volume isotropic fast spin echo acquisition (VISTA) magnetic resonance imaging (MRI) of the calcaneofibular ligament (CFL) view is comparable to that of 2D fast spin echo T2-weighted images (2D T2 FSE) for the evaluation of the CFL, and whether 3D VISTA can replace 2D T2 FSE for the evaluation of CFL injuries. MATERIALS AND METHODS This retrospective study included 76 patients who underwent ankle MRI with CFL views of both 2D T2 FSE MRI and 3D VISTA. The signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) of both techniques were measured. The anatomical identification score and diagnostic performances were evaluated by two readers independently. The diagnostic performances of 3D VISTA and 2D T2 FSE were analysed by sensitivity, specificity, and accuracy for diagnosing CFL injury with reference standards of surgically or clinically confirmed diagnoses. Surgical correlation was performed in 29% of the patients, and clinical examination was used in those who did not have surgery (71%). RESULTS The SNRs and CNRs of 3D VISTA were significantly higher than those of 2D T2 FSE. The anatomical identification scores on 3D VISTA were inferior to those on 2D T2 FSE, and the differences were statistically significant (p<0.05). There were no significant differences in diagnostic performance between the two sequences when diagnoses were classified as normal or abnormal. CONCLUSION Although the image quality of 3D VISTA MRI of the CFL view is not equal to that of 2D T2 FSE for the anatomical evaluation of CFL, 3D VISTA has a diagnostic performance comparable to that of 2D T2 FSE for the diagnosis of CFL injuries.
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Affiliation(s)
- H J Park
- Department of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - S Y Lee
- Department of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
| | - Y J Choi
- Department of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - H P Hong
- Department of Radiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - S J Park
- Department of Orthopaedic Surgery, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - J H Park
- Department of Orthopaedic Surgery, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - E Kim
- Department of Orthopaedic Surgery, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
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Abidi A, Park SJ, Jebelli B, Luna EN, Jones KD. Vaginal Laparoscopic Bilateral Salpingo-Oophorectomy. J Minim Invasive Gynecol 2016. [DOI: 10.1016/j.jmig.2016.08.681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Abidi A, Park SJ, Jebelli B, Luna EN, Jones KD, Spencer LY. Vaginal Laparoscopy. J Minim Invasive Gynecol 2016. [DOI: 10.1016/j.jmig.2016.08.527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Park SJ, Yeum KJ, Choi B, Kim YS, Joo NS. Positive correlation of serum HDL cholesterol with blood mercury concentration in metabolic syndrome Korean men (analysis of KNANES 2008-2010, 2013). J Endocrinol Invest 2016; 39:1031-8. [PMID: 27107997 DOI: 10.1007/s40618-016-0459-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Accepted: 03/14/2016] [Indexed: 10/21/2022]
Abstract
PURPOSE High-density lipoprotein cholesterol (HDLC) is anti-inflammatory in the basal state and pro-inflammatory during the acute-phase response. Blood mercury also has an inflammatory property. Therefore, the aim of this study was to investigate the relationship between serum HDLC and blood mercury concentration in relation with metabolic syndrome (MS). METHODS The data of 7616 subjects (3713 men and 3903 women), over 20 years of age, from 2008 to 2013, Korea National Health and Nutrition Examination Survey were selected for cross-sectional analyses. Correlation and regression of serum HDLC and blood mercury were initially done. We compared serum HDLC concentration according to blood mercury quartile after adjustment for relevant variables in subjects with MS. RESULTS Mean blood mercury concentrations is 5.6 and 3.9 μg/dL in men and women, respectively. Blood mercury concentration in MS subjects was positively correlated with serum HDLC concentration, especially in men. In addition, HDLC concentration was significantly higher according to the higher blood mercury quartile. CONCLUSION Serum HDLC was positively associated with blood mercury concentration in MS Korean men. Therefore, elevated blood mercury may be a factor to increase serum HDLC concentration in MS men.
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Affiliation(s)
- S J Park
- Ajou University School of Medicine, Suwon, Gyeonggi-do, South Korea
| | - K J Yeum
- KunKuk University, Chung-ju, Chungcheongbuk-do, South Korea
| | - B Choi
- Cha University, Gangnam-gu, Seoul, South Korea
| | - Y S Kim
- Cha University School of Medicine, Seongnam, Gyeonggi-do, South Korea
| | - N S Joo
- Ajou University School of Medicine, Suwon, Gyeonggi-do, South Korea.
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Abstract
Reflex bradycardia and cardiac arrest may be the result of a vagal reflex, which can occur during a variety of surgical procedures. We report a patient who developed cardiac arrest as a result of a vagal reflex that was potentiated by thoracic epidural analgesia during general anaesthesia. A 53-year-old man was scheduled for subtotal gastrectomy because of an early gastric adenocarcinoma. After an epidural catheter had been inserted, general anaesthesia was induced. During surgery, an abdominal self-retaining retractor was set up but bradycardia and cardiac arrest developed. The patient returned to a normal sinus rhythm after successful resuscitation. We conclude that bradycardia as a result of a vagal reflex is mediated by potent abdominal wall traction and is potentiated by epidural analgesia. Early diagnosis and proper treatment can allow a full recovery, even in high-risk patients.
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Affiliation(s)
- J Y Park
- Department of Anesthesiology and Pain Medicine, College of Medicine, Korea University, Seoul, Korea
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Lee ES, Won YJ, Kim BC, Park D, Bae JH, Park SJ, Noh SJ, Kang YR, Choi SH, Yoon JH, Heo K, Yang K, Son TG. Low-dose irradiation promotes Rad51 expression by down-regulating miR-193b-3p in hepatocytes. Sci Rep 2016; 6:25723. [PMID: 27225532 PMCID: PMC4880923 DOI: 10.1038/srep25723] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 04/21/2016] [Indexed: 12/28/2022] Open
Abstract
Current evidence indicates that there is a relationship between microRNA (miRNA)-mediated gene silencing and low-dose irradiation (LDIR) responses. Here, alterations of miRNA expression in response to LDIR exposure in male BALB/c mice and three different types of hepatocytes were investigated. The miRNome of the LDIR-exposed mouse spleens (0.01 Gy, 6.5 mGy/h) was analyzed, and the expression of miRNA and mRNA was validated by qRT-PCR. Western blotting, chromatin immunoprecipitation (ChIP), and luciferase assays were also performed to evaluate the interaction between miRNAs and their target genes and to gain insight into the regulation of miRNA expression. The expression of miRNA-193b-3p was down-regulated in the mouse spleen and liver and in various hepatocytes (NCTC, Hepa, and HepG2 cell lines) in response to LDIR. The down-regulation of miR-193b-3p expression was caused by histone deacetylation on the miR-193b-3p promoter in the HepG2 cells irradiated with 0.01 Gy. However, the alteration of histone deacetylation and miR-193b-3p and Rad51 expression in response to LDIR was restored by pretreatment with N-acetyl-cyctein. In conclusion, we provide evidence that miRNA responses to LDIR include the modulation of cellular stress responses and repair mechanisms.
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Affiliation(s)
- Eon-Seok Lee
- Research Center, Dongnam Institute of Radiological and Medical Science, 40 Jwadong-gil, Jangan-eup, Gijang-gun, Busan, 46033, Republic of Korea
| | - Yeo Jin Won
- Research Center, Dongnam Institute of Radiological and Medical Science, 40 Jwadong-gil, Jangan-eup, Gijang-gun, Busan, 46033, Republic of Korea
| | - Byoung-Chul Kim
- In silico Toxicology Research Center, Korea Insititute of Toxciology, Daejeon 305-343, Republic of Korea
| | - Daeui Park
- In silico Toxicology Research Center, Korea Insititute of Toxciology, Daejeon 305-343, Republic of Korea
| | - Jin-Han Bae
- Research Center, Dongnam Institute of Radiological and Medical Science, 40 Jwadong-gil, Jangan-eup, Gijang-gun, Busan, 46033, Republic of Korea
| | - Seong-Joon Park
- Research Center, Dongnam Institute of Radiological and Medical Science, 40 Jwadong-gil, Jangan-eup, Gijang-gun, Busan, 46033, Republic of Korea
| | - Sung Jin Noh
- Research Center, Dongnam Institute of Radiological and Medical Science, 40 Jwadong-gil, Jangan-eup, Gijang-gun, Busan, 46033, Republic of Korea
| | - Yeong-Rok Kang
- Research Center, Dongnam Institute of Radiological and Medical Science, 40 Jwadong-gil, Jangan-eup, Gijang-gun, Busan, 46033, Republic of Korea
| | - Si Ho Choi
- Research Center, Dongnam Institute of Radiological and Medical Science, 40 Jwadong-gil, Jangan-eup, Gijang-gun, Busan, 46033, Republic of Korea
| | - Je-Hyun Yoon
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Kyu Heo
- Research Center, Dongnam Institute of Radiological and Medical Science, 40 Jwadong-gil, Jangan-eup, Gijang-gun, Busan, 46033, Republic of Korea
| | - Kwangmo Yang
- Research Center, Dongnam Institute of Radiological and Medical Science, 40 Jwadong-gil, Jangan-eup, Gijang-gun, Busan, 46033, Republic of Korea.,Department of Radiation Oncology, Korea Institute of Radiological and Medical Sciences, Seoul 139-709, Republic of Korea
| | - Tae Gen Son
- Research Center, Dongnam Institute of Radiological and Medical Science, 40 Jwadong-gil, Jangan-eup, Gijang-gun, Busan, 46033, Republic of Korea
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Chae J, Yang HI, Kim B, Park SJ, Jeon JY. Inflammatory Bowel Disease Patients' Participation, Attitude and Preferences Toward Exercise. Int J Sports Med 2016; 37:665-70. [PMID: 27191208 DOI: 10.1055/s-0042-103244] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The purpose of the study was to investigate the level of exercise participation in patients with inflammatory bowel disease (IBD) and to investigate their intention, attitude and preference toward exercise. The data of 158 IBD patients that participated in a self-administered survey at Severance Hospital between March 2013 and November 2013 were included in this cross sectional and descriptive analysis. Questionnaires included 3 sections to determine the IBD patient's current exercise participation, attitude toward exercise, and exercise preferences. This study investigated IBD patients both collectively, and according to their specific disease: Crohn's disease (CD) (n=62), Ulcerative colitis (UC) (n=73) and intestinal Behçet's disease (BD) (n=23). IBD patients currently participate in 103 min/week of exercise including mild, moderate and strenuous intensity, with BD patients being the least active, followed by CD, and UC being most active. The majority of IBD patients found exercise to be pleasant (57.7%), beneficial (80.5%), sensible (71.8%), uplifting (61%) and good (70.5%), and 44.4% found exercise to be enjoyable. This study shows the IBD patients' participation, attitude and preferences toward exercise and provides much needed information for the development of evidence based exercise programs that are specific to IBD.
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Affiliation(s)
- J Chae
- Sport and Leisure Studies, Yonsei University, Seoul, Korea (the Republic of)
| | - H I Yang
- Sport and Leisure Studies, Yonsei University, Seoul, Korea (the Republic of)
| | - B Kim
- Internal Medicine, Yonsei University College of Medicine, Seodaemun-gu, Korea (the Republic of)
| | - S J Park
- Internal Medicine, Yonsei University College of Medicine, Seodaemun-gu, Korea (the Republic of)
| | - J Y Jeon
- Exercise Medicine Center for Diabetes and Cancer Patients, ICONS, Yonsei University, Korea (the Republic of )
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Jang JY, Chang YR, Kim SW, Choi SH, Park SJ, Lee SE, Lim CS, Kang MJ, Lee H, Heo JS. Randomized multicentre trial comparing external and internal pancreatic stenting during pancreaticoduodenectomy. Br J Surg 2016; 103:668-675. [PMID: 27040594 DOI: 10.1002/bjs.10160] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Revised: 01/22/2016] [Accepted: 02/12/2016] [Indexed: 02/06/2023]
Abstract
BACKGROUND There is no consensus on the best method of preventing postoperative pancreatic fistula (POPF) after pancreaticoduodenectomy (PD). This multicentre, parallel group, randomized equivalence trial investigated the effect of two ways of pancreatic stenting after PD on the rate of POPF. METHODS Patients undergoing elective PD or pylorus-preserving PD with duct-to-mucosa pancreaticojejunostomy were enrolled from four tertiary referral hospitals. Randomization was stratified according to surgeon with a 1 : 1 allocation ratio to avoid any related technical factors. The primary endpoint was clinically relevant POPF rate. Secondary endpoints were nutritional index, remnant pancreatic volume, long-term complications and quality of life 2 years after PD. RESULTS A total of 328 patients were randomized to the external (164 patients) or internal (164) stent group between August 2010 and January 2014. The rates of clinically relevant POPF were 24·4 per cent in the external and 18·9 per cent in the internal stent group (risk difference 5·5 per cent). As the 90 per cent confidence interval (-2·0 to 13·0 per cent) did not fall within the predefined equivalence limits (-10 to 10 per cent), the clinically relevant POPF rates in the two groups were not equivalent. Similar results were observed for patients with soft pancreatic texture and high fistula risk score. Other postoperative outcomes were comparable between the two groups. Five stent-related complications occurred in the external stent group. Multivariable analysis revealed that soft pancreatic texture, non-pancreatic disease and high body mass index (23·3 kg/m2 or above) predicted clinically relevant POPF. CONCLUSION External stenting after PD was associated with a higher rate of clinically relevant POPF than internal stenting. Registration number: NCT01023594 (https://www.clinicaltrials.gov).
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Affiliation(s)
- J-Y Jang
- Departments of Surgery, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Y R Chang
- Departments of Surgery, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - S-W Kim
- Departments of Surgery, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - S H Choi
- Samsung Medical Centre, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - S J Park
- Centre for Liver Cancer, National Cancer Centre, Gyeonggido, Republic of Korea
| | - S E Lee
- Chung-Ang University Hospital, Seoul, Republic of Korea
| | - C-S Lim
- Departments of Surgery, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - M J Kang
- Departments of Surgery, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - H Lee
- Samsung Medical Centre, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - J S Heo
- Samsung Medical Centre, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
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Park JH, Jeong HJ, Shin HK, Park SJ, Lee JH, Kim E. Piriformis ganglion: An uncommon cause of sciatica. Orthop Traumatol Surg Res 2016; 102:257-60. [PMID: 26969206 DOI: 10.1016/j.otsr.2015.11.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Revised: 10/06/2015] [Accepted: 11/23/2015] [Indexed: 02/02/2023]
Abstract
UNLABELLED Sciatica can occur due to a spinal lesion, intrapelvic tumor, diabetic neuropathy, and rarely piriformis syndrome. The causes of piriformis syndrome vary by a space-occupying lesion. A ganglionic cyst can occur in various lesions in the body but seldom around the hip joint. In addition, sciatica due to a ganglionic cyst around the hip joint has been reported in one patient in Korea who underwent surgical treatment. We experienced two cases of sciatica from a piriformis ganglionic cyst and we report the clinical characterics and progress after non-operative treatment by ultrasonography-guided aspiration. The two cases were diagnosed by magnetic resonance imaging and were treated by ultrasonography-guided aspiration. We followed the patients for more than 6months. The symptoms of piriformis syndrome from the ganglion improved following aspiration and this conservative treatment is a treatment method that can be used without extensive incision or cyst excision. LEVEL OF EVIDENCE Level IV historical case.
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Affiliation(s)
- J H Park
- Department of Orthopaedic Surgery, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, 29 Saemunan-ro, Jongno-gu, Seoul, 110 746, Republic of Korea.
| | - H J Jeong
- Department of Orthopaedic Surgery, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, 29 Saemunan-ro, Jongno-gu, Seoul, 110 746, Republic of Korea.
| | - H K Shin
- Department of Orthopaedic Surgery, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, 29 Saemunan-ro, Jongno-gu, Seoul, 110 746, Republic of Korea.
| | - S J Park
- Department of Orthopaedic Surgery, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, 29 Saemunan-ro, Jongno-gu, Seoul, 110 746, Republic of Korea.
| | - J H Lee
- Department of Orthopaedic Surgery, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, 29 Saemunan-ro, Jongno-gu, Seoul, 110 746, Republic of Korea.
| | - E Kim
- Department of Orthopaedic Surgery, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, 29 Saemunan-ro, Jongno-gu, Seoul, 110 746, Republic of Korea.
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Yoon JH, Yhim HY, Kwak JY, Ahn JS, Yang DH, Lee JJ, Kim SJ, Kim JS, Park SJ, Choi CW, Eom HS, Park SK, Choi SY, Kim SH, Kim DW, Lee S. Minimal residual disease-based effect and long-term outcome of first-line dasatinib combined with chemotherapy for adult Philadelphia chromosome-positive acute lymphoblastic leukemia. Ann Oncol 2016; 27:1081-1088. [PMID: 26951627 DOI: 10.1093/annonc/mdw123] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2015] [Accepted: 02/21/2016] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND The use of imatinib combined with chemotherapy has demonstrated improved outcome in adults with Philadelphia chromosome-positive acute lymphoblastic leukemia (Ph-positive ALL). However, a substantial proportion of patients continue to die as a result of disease progression. PATIENTS AND METHODS We assessed the minimal residual disease (MRD)-based effect and long-term outcome of first-line incorporation of dasatinib (100 mg once daily) into chemotherapy alternatively for adults with Ph-positive ALL. The primary end point was the major molecular response (MMR) rate by the end of the second dasatinib cycle. Patients with a donor proceeded to allogeneic stem cell transplantation (SCT) as early as possible. MRD monitoring was centrally evaluated by real-time quantitative polymerase chain reaction (4.5-log sensitivity) using bone marrow samples. RESULTS Fifty-one patients (median age, 46 years) were enrolled and treated with this strategy. After the first dasatinib cycle, 50 patients (98.0%) achieved complete remission (CR). By the end of the second dasatinib cycle, 46 (93.9%) of 49 assessable patients had persistent CR, and 38 (77.6%) had MMR (32.7%) or undetectable MRD (44.9%). On the basis of the MRD kinetics by this time point, the numbers of early-stable, late, and poor molecular responders were 23 (46.9%), 15 (30.7%), and 11 (22.4%), respectively. Thirty-nine patients (76.5%) underwent allogeneic SCT in CR1. After a median follow-up of 54 months, the 4-year cumulative incidence of relapse and disease-free survival (DFS) rate for all patients were 30.0% and 52.0%, respectively, and the corresponding outcomes among those receiving allogeneic SCT in CR1 were 20.5% and 64.1%, respectively. Poor molecular responders had a higher risk of relapse and DFS than those of early-stable molecular responders. CONCLUSION This dasatinib-based protocol was effective for achieving a good quality molecular response and durable DFS in adults with Ph-positive ALL. TRIAL REGISTRATION clinicaltrials.gov, NCT01004497.
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Affiliation(s)
- J-H Yoon
- Department of Hematology, Catholic BMT Center; Leukemia Research Institute, College of Medicine, The Catholic University of Korea, Seoul
| | - H-Y Yhim
- Division of Hematology-Oncology, Department of Internal Medicine, Chonbuk National University Medical School, Jeonju
| | - J-Y Kwak
- Division of Hematology-Oncology, Department of Internal Medicine, Chonbuk National University Medical School, Jeonju
| | - J-S Ahn
- Department of Hematology-Oncology, Chonnam National University Hwasun Hospital, Jeollanamdo
| | - D-H Yang
- Department of Hematology-Oncology, Chonnam National University Hwasun Hospital, Jeollanamdo
| | - J-J Lee
- Department of Hematology-Oncology, Chonnam National University Hwasun Hospital, Jeollanamdo
| | - S-J Kim
- Division of Hematology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul
| | - J-S Kim
- Division of Hematology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul
| | - S J Park
- Division of Hematology-Oncology, Department of Internal Medicine, Korea University School of Medicine, Seoul
| | - C W Choi
- Division of Hematology-Oncology, Department of Internal Medicine, Korea University School of Medicine, Seoul
| | - H-S Eom
- Hematologic Oncology Clinic, Center for Specific Organs Center, National Cancer Center, Goyang
| | - S-K Park
- Division of Hematology-Oncology, Department of Internal Medicine, Soonchunhyang University School of Medicine, Bucheon, Republic of Korea
| | - S-Y Choi
- Leukemia Research Institute, College of Medicine, The Catholic University of Korea, Seoul
| | - S-H Kim
- Leukemia Research Institute, College of Medicine, The Catholic University of Korea, Seoul
| | - D-W Kim
- Department of Hematology, Catholic BMT Center; Leukemia Research Institute, College of Medicine, The Catholic University of Korea, Seoul
| | - S Lee
- Department of Hematology, Catholic BMT Center; Leukemia Research Institute, College of Medicine, The Catholic University of Korea, Seoul.
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Park SJ, Kim BG, Oh AH, Han SH, Han HS, Ryu JH. Effects of intraoperative protective lung ventilation on postoperative pulmonary complications in patients with laparoscopic surgery: prospective, randomized and controlled trial. Surg Endosc 2016; 30:4598-606. [PMID: 26895920 DOI: 10.1007/s00464-016-4797-x] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Accepted: 02/03/2016] [Indexed: 12/31/2022]
Abstract
BACKGROUND Respiratory functions are usually impaired during pneumoperitoneum for laparoscopic surgery. This randomized, controlled and single-blinded study was performed to evaluate whether intraoperative protective lung ventilation influences postoperative pulmonary complications after laparoscopic hepatobiliary surgery. METHODS Sixty-two patients were randomized to receive either conventional ventilation with alveolar recruitment maneuver (tidal volume of 10 ml/kg with inspiratory pressure of 40 cmH2O for 30 s after the end of pneumoperitoneum, group R), or protective lung ventilation (low tidal volume of 6 ml/kg with positive end-expiratory pressure [PEEP] of 5 cmH2O, group P). Induction and maintenance of anesthesia were done with balanced anesthesia. Respiratory complications such as atelectasis, pneumonia or desaturation were observed postoperatively. The length of hospital stay, arterial blood gas analysis, peak inspiratory pressure and hemodynamic variables were also recorded. Results are presented as mean ± SD or number of patients (%). RESULTS Postoperative pulmonary complications (P = 0.023) and desaturation below 90 % (P = 0.016) occurred less frequently in group P than in group R. Eight patients of group R and 3 patients of group P showed atelectasis. Pneumonia was diagnosed in 1 patient of group R. No differences were observed in the length of hospital stay, arterial blood gas analysis (pH, PaO2, PaCO2 and PAO2) and hemodynamic variables except PAO2, AaDO2 and peak inspiratory pressure between the two groups. CONCLUSION Protective lung ventilation (low tidal volume with PEEP) during pneumoperitoneum was associated with less incidences of pulmonary complications than conventional ventilation with alveolar recruitment maneuver after laparoscopic hepatobiliary surgery.
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Affiliation(s)
- S J Park
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Gumiro-Gil 173, Bundang-gu, Seong-Nam Si, Seoul, 13620, South Korea
- Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, Seongnam-Si, Gyeonggi-do, South Korea
| | - B G Kim
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Gumiro-Gil 173, Bundang-gu, Seong-Nam Si, Seoul, 13620, South Korea
- Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, Seongnam-Si, Gyeonggi-do, South Korea
| | - A H Oh
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Gumiro-Gil 173, Bundang-gu, Seong-Nam Si, Seoul, 13620, South Korea
- Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, Seongnam-Si, Gyeonggi-do, South Korea
| | - S H Han
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Gumiro-Gil 173, Bundang-gu, Seong-Nam Si, Seoul, 13620, South Korea
- Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, Seongnam-Si, Gyeonggi-do, South Korea
| | - H S Han
- Department of Surgery, Seoul National University Bundang Hospital, Seongnam-Si, Gyeonggi-do, South Korea
| | - J H Ryu
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Gumiro-Gil 173, Bundang-gu, Seong-Nam Si, Seoul, 13620, South Korea.
- Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, Seongnam-Si, Gyeonggi-do, South Korea.
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Lee MH, Park B, Song EJ, Park SJ, Kong SY, Lee ES. Abstract P4-10-12: Psychosocial health of disease-free breast cancer survivors compared with cancer-free general population: Korean health examinee cohort study. Cancer Res 2016. [DOI: 10.1158/1538-7445.sabcs15-p4-10-12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background/purpose: The number of long-term breast cancer survivors is increasing rapidly due to the growing rates of detection, incidence and improved survival. Quality of life (QOL) of physical and psychosocial health outcomes vary across the breast cancer survivors including diagnosis at different stages of breast cancer. There is little data regarding the psychosocial health of disease-free breast cancer survivors compared with those of general population. We conducted to assess the QOL, especially psychosocial health, of disease-free female survivors over 2 year after breast cancer diagnosis compared with cancer-free control women.
Methods: We used baseline data from the health examinee cohort, a part of the Korea Genome Epidemiology Study which is a large scaled cohort study established since 2001. This cohort has collected data of past medical history, socioeconomical factors (income, education, marital status and current employment status) and health behavioral factors (smoking, drinking, physical activity, BMI, menopausal status and subjective health status) of participants while they underwent regular health examination. The disease-free breast cancer survivors were defined as those who answered that they were ≥2 years from the initial diagnosis of breast cancer without recurrence and current treatment. Among the participants female subjects without history of any type cancer were randomly selected at 1:4 ratio by 5-year age groups, educational attainment level and household income as a comparison group. We analyzed Psychosocial Well-being Index-Short Form (PWI-SF) in these two groups. Subjects with score ≤8, 9–26, and 27 were classified as the 'healthy group', 'latent stress group', and 'stress group,' respectively.
Results: Total 347 survivors of breast cancer and 1,388 matched participants without cancer history were selected for analysis. Even after being matched for education and household income status, breast cancer survivors showed better psychosocial health status and health behaviors compared with matched comparison group. The prevalence of latent stress and stress group (vs healthy group) by PWI-SF score was 88.2% in breast cancer survivors and 89.9% in the matched female controls, showing borderline significant differences (p = 0.057). The prevalence rates of ever drinkers and smokers or obese women were lower and of those who exercised ≥150 min/week were higher in breast cancer survivors (p < 0.05). The total PWI-SF score was lower in breast cancer survivors, suggesting lower level of psychosocial stress level in breast cancer survivors. After adjusting for effects of other sociodemographic variables, breast cancer survivors were less likely to be included in stress group by 36% (OR = 0.64; 95% confidence interval [CI], 0.42–0.98).
Conclusions: The disease-free breast cancer survivors with regular health examination showed better psychosocial health status compared with matched general population. The better health behaviors in cancer survivors such as less alcohol drinking, low BMI, less history of smoking and more regular exercise, which have been identified in several previous cancer survivors studies might be attributed to their better psychosocial health status.
Citation Format: Lee MH, Park B, Song EJ, Park SJ, Kong S-Y, Lee ES. Psychosocial health of disease-free breast cancer survivors compared with cancer-free general population: Korean health examinee cohort study. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P4-10-12.
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Affiliation(s)
- MH Lee
- Research Institute and Hospital, National Cancer Center, Goyang, Republic of Korea
| | - B Park
- Research Institute and Hospital, National Cancer Center, Goyang, Republic of Korea
| | - EJ Song
- Research Institute and Hospital, National Cancer Center, Goyang, Republic of Korea
| | - SJ Park
- Research Institute and Hospital, National Cancer Center, Goyang, Republic of Korea
| | - S-Y Kong
- Research Institute and Hospital, National Cancer Center, Goyang, Republic of Korea
| | - ES Lee
- Research Institute and Hospital, National Cancer Center, Goyang, Republic of Korea
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Park SJ, Kim JG, Kim ND, Yang K, Shim JW, Heo K. Estradiol, TGF-β1 and hypoxia promote breast cancer stemness and EMT-mediated breast cancer migration. Oncol Lett 2016; 11:1895-1902. [PMID: 26998096 DOI: 10.3892/ol.2016.4115] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Accepted: 12/11/2015] [Indexed: 12/25/2022] Open
Abstract
Breast cancer is one of the most common cancer types among women, acting as a distinct cause of mortality, and has a high incidence of recurrence. External stimuli, including 17β-estradiol (E2), transforming growth factor (TGF)-β1 and hypoxia, may be important in breast cancer growth and metastasis. However, the effects of these stimuli on breast cancer stem cell (CSC) regulation have not been fully investigated. In the present study, the proportion of cluster of differentiation (CD)44+/CD24-/low cells increased following treatment with E2, TGF-β1 and hypoxia in MCF-7 cells. The expression of CSC markers, including SOX2, KLF4 and ABCG2, was upregulated continually by E2, TGF-β1 and hypoxia. In addition, the expression levels of epithelial-mesenchymal transition-associated factors increased following treatment with E2, TGF-β1 and hypoxia. Therefore, the migration ability of E2-, TGF-β1- and hypoxia-treated MCF-7 cells was enhanced compared with control cells. In addition, the enhancement of apoptosis by 5-flurouracil or radiation was abolished following treatment with E2, TGF-β1 and hypoxia. These results indicate that E2, TGF-β1 and hypoxia are important for regulating breast CSCs, and that the modulation of the microenvironment in tumors may improve the efficiency of breast cancer therapy.
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Affiliation(s)
- Seong-Joon Park
- Research Center, Dongnam Institute of Radiological and Medical Sciences, Busan 46033, Republic of Korea; Department of Pharmacy, Pusan National University, Busan 46241, Republic of Korea
| | - Joong-Gook Kim
- Research Center, Dongnam Institute of Radiological and Medical Sciences, Busan 46033, Republic of Korea
| | - Nam Deuk Kim
- Department of Pharmacy, Pusan National University, Busan 46241, Republic of Korea
| | - Kwangmo Yang
- Research Center, Dongnam Institute of Radiological and Medical Sciences, Busan 46033, Republic of Korea; Department of Radiation Oncology, Dongnam Institute of Radiological & Medical Sciences, Busan 46033, Republic of Korea; Department of Radiation Oncology, Korea Institute of Radiological & Medical Sciences, Seoul 01812, Republic of Korea
| | - Jae Woong Shim
- Research Center, Dongnam Institute of Radiological and Medical Sciences, Busan 46033, Republic of Korea
| | - Kyu Heo
- Research Center, Dongnam Institute of Radiological and Medical Sciences, Busan 46033, Republic of Korea
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Park HJ, Lee SY, Park NH, Rho MH, Chung EC, Park JH, Park SJ. Three-dimensional isotropic T2-weighted fast spin-echo (VISTA) ankle MRI versus two-dimensional fast spin-echo T2-weighted sequences for the evaluation of anterior talofibular ligament injury. Clin Radiol 2016; 71:349-55. [PMID: 26774370 DOI: 10.1016/j.crad.2015.12.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [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: 10/07/2015] [Revised: 11/30/2015] [Accepted: 12/14/2015] [Indexed: 11/19/2022]
Abstract
AIM To compare the performance of axial images of the ankle joint on three-dimensional (3D) volume isotropic turbo spin echo acquisition (VISTA) with that of two-dimensional (2D) fast spin echo (FSE) T2-weighted images for the diagnosis of anterior talofibular ligament (ATFL) injury. MATERIALS AND METHODS This retrospective study included 101 patients who underwent both 2D FSE T2-weighted and 3D VISTA magnetic resonance imaging (MRI) of the ankle. The signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) of both sequences were measured. The anatomical identification score and diagnostic performances of both sequences were evaluated by two radiologists. The diagnostic performances of 3D VISTA and 2D FSE images were analysed in terms of sensitivity, specificity, and accuracy for diagnosing ATFL injury. Surgically or clinically confirmed diagnoses were used as reference standards. RESULTS The margin sharpness scores on 3D VISTA were significantly inferior to those of 2D FSE (p<0.001). Other scores (entire length, entire width) were not significantly different between the two imaging methods. The SNRs and CNRs of 3D VISTA were significantly higher than those of 2D FSE (p<0.001). When diagnoses were classified as normal and abnormal, the specificity of the 3D VISTA images for the diagnosis of ATFL injury was 95.7%, significantly superior to 2D FSE (84.3-85.7%). There were no significant differences between 3D VISTA and 2D FSE images in sensitivity or accuracy for diagnosis (p=0.227-1.000), with the exception of accuracy by reader 1 (p=0.039). CONCLUSION 3D VISTA imaging has a diagnostic performance comparable to that of 2D FSE for the diagnosis of ATFL injury, although 3D VISTA is inferior to 2D FSE for the evaluation of margin sharpness. Replacing axial and coronal images with 3D VISTA can save imaging time without negatively impacting the diagnostic ability for ATFL injury.
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Affiliation(s)
- H J Park
- Department of Radiology, Sungkyunkwan University School of Medicine, Kangbuk Samsung Hospital, Republic of Korea
| | - S Y Lee
- Department of Radiology, Sungkyunkwan University School of Medicine, Kangbuk Samsung Hospital, Republic of Korea
| | - N H Park
- Department of Radiology, Myongji Hospital, Seonam University College of Medicine, Republic of Korea.
| | - M H Rho
- Department of Radiology, Sungkyunkwan University School of Medicine, Kangbuk Samsung Hospital, Republic of Korea
| | - E C Chung
- Department of Radiology, Sungkyunkwan University School of Medicine, Kangbuk Samsung Hospital, Republic of Korea
| | - J H Park
- Department of Orthopaedic Surgery, Sungkyunkwan University School of Medicine, Kangbuk Samsung Hospital, Republic of Korea
| | - S J Park
- Department of Orthopaedic Surgery, Sungkyunkwan University School of Medicine, Kangbuk Samsung Hospital, Republic of Korea
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Park SJ, Oh SH, Kang MS, Kim TH, Kang SW, Yoon YC, Kim YH. Reuse of a previously transplanted kidney from a deceased donor using Luminex virtual crossmatching: a case report. Transplant Proc 2015; 46:2083-5. [PMID: 25131112 DOI: 10.1016/j.transproceed.2014.06.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Kidney transplantation is the most desired modality of renal replacement therapy for patients with end-stage renal disease (ESRD). We have attempted to expand the organ donor pool through several methods, including the use of expanded donor criteria. Although previously transplanted kidneys are rarely reused, they can be suitable for transplantation into patients in need. We report a case of successful reuse of a previously transplanted kidney from a deceased donor by means of Luminex virtual crossmatching with the first donor and actual crossmatching with the second donor.
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Affiliation(s)
- S J Park
- Organ Transplantation Center, College of Medicine, Busan Paik Hospital, Inje University, Busan, Republic of Korea; Department of Nephrology, College of Medicine, Busan Paik Hospital, Inje University, Busan, Republic of Korea
| | - S H Oh
- Department of Laboratory Medicine, College of Medicine, Busan Paik Hospital, Inje University, Busan, Republic of Korea
| | - M S Kang
- Department of Pathology, College of Medicine, Busan Paik Hospital, Inje University, Busan, Republic of Korea
| | - T H Kim
- Department of Nephrology, College of Medicine, Busan Paik Hospital, Inje University, Busan, Republic of Korea
| | - S W Kang
- Department of Nephrology, College of Medicine, Busan Paik Hospital, Inje University, Busan, Republic of Korea
| | - Y C Yoon
- Organ Transplantation Center, College of Medicine, Busan Paik Hospital, Inje University, Busan, Republic of Korea; Department of Cardiovascular Surgery, College of Medicine, Busan Paik Hospital, Inje University, Busan, Republic of Korea
| | - Y H Kim
- Organ Transplantation Center, College of Medicine, Busan Paik Hospital, Inje University, Busan, Republic of Korea; Department of Nephrology, College of Medicine, Busan Paik Hospital, Inje University, Busan, Republic of Korea.
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Kim DH, Moon EY, Yi JH, Lee HE, Park SJ, Ryu YK, Kim HC, Lee S, Ryu JH. Peptide fragment of thymosin β4 increases hippocampal neurogenesis and facilitates spatial memory. Neuroscience 2015; 310:51-62. [PMID: 26363149 DOI: 10.1016/j.neuroscience.2015.09.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 09/01/2015] [Accepted: 09/01/2015] [Indexed: 12/16/2022]
Abstract
Although several studies have suggested the neuroprotective effect of thymosin β4 (TB4), a major actin-sequestering protein, on the central nervous system, little is understood regarding the action of N-acetyl-serylaspartyl-lysyl-proline (Ac-SDKP), a peptide fragment of TB4 on brain function. Here, we examined neurogenesis-stimulative effect of Ac-SDKP. Intrahippocampal infusion of Ac-SDKP facilitated the generation of new neurons in the hippocampus. Ac-SDKP-treated mouse hippocampus showed an increase in β-catenin stability with reduction of glycogen synthase kinase-3β (GSK-3β) activity. Moreover, inhibition of vascular endothelial growth factor (VEGF) signaling blocked Ac-SDKP-facilitated neural proliferation. Subchronic intrahippocampal infusion of Ac-SDKP also increased spatial memory. Taken together, these data demonstrate that Ac-SDKP functions as a regulator of neural proliferation and indicate that Ac-SDKP may be a therapeutic candidate for diseases characterized by neuronal loss.
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Affiliation(s)
- D H Kim
- Department of Medicinal Biotechnology, College of Natural Resources and Life Science, Dong-A University, Busan 604-714, Republic of Korea; Dong-A Anti-Aging Research Center, Dong-A University, Busan 604-714, Republic of Korea
| | - E-Y Moon
- Department of Bioscience and Biotechnology, Sejong University, Seoul 143-747, Republic of Korea.
| | - J H Yi
- School of Clinical Sciences, Faculty of Medicine and Dentistry, University of Bristol, Bristol, UK
| | - H E Lee
- Department of Life and Nanopharmaceutical Sciences, College of Pharmacy, Kyung Hee University, Seoul 130-701, Republic of Korea; Kyung Hee East-West Pharmaceutical Research Institute, College of Pharmacy, Kyung Hee University, Seoul 130-701, Republic of Korea
| | - S J Park
- Department of Life and Nanopharmaceutical Sciences, College of Pharmacy, Kyung Hee University, Seoul 130-701, Republic of Korea; Kyung Hee East-West Pharmaceutical Research Institute, College of Pharmacy, Kyung Hee University, Seoul 130-701, Republic of Korea
| | - Y-K Ryu
- Department of Bioscience and Biotechnology, Sejong University, Seoul 143-747, Republic of Korea
| | - H-C Kim
- Biomedical Mouse Resource Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Taejeon 305-806, Republic of Korea
| | - S Lee
- Faculty of Marine Biomedical Science, Cheju National University, Jeju 690-756, Republic of Korea
| | - J H Ryu
- Department of Life and Nanopharmaceutical Sciences, College of Pharmacy, Kyung Hee University, Seoul 130-701, Republic of Korea; Department of Oriental Pharmaceutical Science, College of Pharmacy, Kyung Hee University, Seoul 130-701, Republic of Korea; Kyung Hee East-West Pharmaceutical Research Institute, College of Pharmacy, Kyung Hee University, Seoul 130-701, Republic of Korea.
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73
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Han SJ, Min HJ, Yoon SC, Ko EA, Park SJ, Yoon JH, Shin JS, Seo KY. HMGB1 in the pathogenesis of ultraviolet-induced ocular surface inflammation. Cell Death Dis 2015; 6:e1863. [PMID: 26313914 PMCID: PMC4558494 DOI: 10.1038/cddis.2015.199] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Revised: 05/27/2015] [Accepted: 06/16/2015] [Indexed: 01/19/2023]
Abstract
High-mobility group box 1 (HMGB1) functions as a transcription-enhancing nuclear protein as well as a crucial cytokine that regulates inflammation. This study demonstrated that secretion of HMGB1 due to ultraviolet (UV) radiation inducing ocular surface inflammation-mediated reactive oxygen species (ROS) production. After treating conjunctival epithelial cells with UV radiation, HMGB1 was translocated from the nucleus to the cytoplasm and then eventually to the extracellular space. HMGB1 played a crucial role in UV-induced conjunctival neutrophil infiltration, which subsided when mice were pretreated with the HMGB1 inhibitors soluble receptor for advanced glycation endproducts (sRAGEs) and HMGB1 A box protein. In case of using ROS quencher, there was decrease in UV-induced HMGB1 secretion in conjunctival epithelial cells and mice. Considering that UV-induced chronic inflammation causes ocular surface change as pterygium, we have confirmed high HMGB1 translocation and ROS expression in human pterygium. Our findings therefore revealed a previously unknown mechanism of UV-induced ocular inflammation related to ROS and HMGB1 suggesting a new medical therapeutic target.
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Affiliation(s)
- S J Han
- Department of Ophthalmology, Institute of Vision Research, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - H J Min
- Department of Otorhinolaryngology - Head and Neck Surgery, Chung-Ang University College of Medicine, Seoul, Korea.,Brain Korea 21 Plus Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - S C Yoon
- Department of Ophthalmology, Institute of Vision Research, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - E A Ko
- Brain Korea 21 Plus Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea.,Department of Microbiology, Yonsei University College of Medicine, Seoul, Korea
| | - S J Park
- Brain Korea 21 Plus Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea.,Department of Microbiology, Yonsei University College of Medicine, Seoul, Korea
| | - J-H Yoon
- Brain Korea 21 Plus Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea.,Department of Otorhinolaryngology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.,Severance Biomedical Science Institute and Institute for Immunology and Immunological Diseases, Yonsei University College of Medicine, Seoul, Korea
| | - J-S Shin
- Brain Korea 21 Plus Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea.,Department of Microbiology, Yonsei University College of Medicine, Seoul, Korea.,Severance Biomedical Science Institute and Institute for Immunology and Immunological Diseases, Yonsei University College of Medicine, Seoul, Korea
| | - K Y Seo
- Department of Ophthalmology, Institute of Vision Research, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
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74
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Moon HJ, Jung I, Park SJ, Kim MJ, Youk JH, Kim EK. Comparison of Cancer Yields and Diagnostic Performance of Screening Mammography vs. Supplemental Screening Ultrasound in 4394 Women with Average Risk for Breast Cancer. Ultraschall Med 2015; 36:255-263. [PMID: 24764212 DOI: 10.1055/s-0034-1366288] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
PURPOSE The effectiveness of supplemental screening ultrasound (US) was investigated in women ≥ 40 years at average risk for breast cancer regardless of breast parenchymal density. A total of 4394 women at average risk and having previously undergone screening mammography were classified as the mammography group. MATERIALS AND METHODS Of 4394 women, 2005 underwent screening US after a final assessment of category 1 or 2 on screening mammography, and were categorized as the US group. Category 0, 4, and 5 on mammography and 3, 4, and 5 on US were defined as positive. The cancer yields per 1000 women and diagnostic performance of two groups were compared. RESULTS The total cancer and invasive cancer yields for the mammography group were 3.0 (95 % confidence interval 1.6, 5.1) and 2.0 (95 % CI, 0.9, 3.9) per 1000 women, higher than the US values of 2.0 (0.5, 5.1) and 1.0 (0.1, 3.6), not statistically significant. The specificity, accuracy, and positive predictive value (PPV) for mammography were 88.90 % (87.93, 89.81), 88.85 % (87.88, 89.76), and 2.61 % (1.39, 4.41), significantly higher than the US values of 69.07 % (66.99, 71.09), 69.13 % (67.05, 71.15), and 0.64 % (0.18, 1.64). The short-term follow-up rate of mammography was 5.51 % (4.85, 6.22), significantly lower than the rate of 26.58 (24.66, 28.58) for US. CONCLUSION Supplemental screening US in mammographically negative breasts can find additional carcinomas in women at average risk but is not as effective as screening mammography because of the lower cancer yield, invasive cancer yield, specificity, accuracy, PPV and a high short-term follow-up rate.
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Affiliation(s)
- H J Moon
- Department of Radiology, Research Institute of Radiological Science, Yonsei University, College of Medicine, Seoul, Republic of Korea
| | - I Jung
- Department of Biostatistics, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - S J Park
- Department of Radiology, Research Institute of Radiological Science, Yonsei University, College of Medicine, Seoul, Republic of Korea
| | - M J Kim
- Department of Radiology, Research Institute of Radiological Science, Yonsei University, College of Medicine, Seoul, Republic of Korea
| | - J H Youk
- Department of Radiology, Research Institute of Radiological Science, Yonsei University, College of Medicine, Seoul, Republic of Korea
| | - E K Kim
- Department of Radiology, Research Institute of Radiological Science, Yonsei University, College of Medicine, Seoul, Republic of Korea
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75
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Kim MY, Park SJ, Shim JW, Yang K, Kang HS, Heo K. Naphthazarin enhances ionizing radiation-induced cell cycle arrest and apoptosis in human breast cancer cells. Int J Oncol 2015; 46:1659-66. [PMID: 25633658 DOI: 10.3892/ijo.2015.2857] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 01/12/2015] [Indexed: 11/05/2022] Open
Abstract
Naphthazarin (Naph, DHNQ, 5,8-dihydroxy-l,4-naphthoquinone) is one of the naturally available 1,4-naphthoquinone derivatives that are well-known for their anti-inflammatory, antioxidant, antibacterial and antitumor cytotoxic effects in cancer cells. Herein, we investigated whether Naph has effects on cell cycle arrest and apoptosis in MCF-7 human breast cancer cells exposed to ionizing radiation (IR). Naph reduced the MCF-7 cell viability in a dose-dependent manner. We also found that Naph and/or IR increased the p53-dependent p21 (CIP/WAF1) promoter activity. Noteworthy, our ChIP assay results showed that Naph and IR combined treatment activated the p21 promoter via inhibition of binding of multi-domain proteins, DNMT1, UHRF1 and HDAC1. Apoptosis and cell cycle analyses demonstrated that Naph and IR combined treatment induced cell cycle arrest and apoptosis in MCF-7 cells. Herein, we showed that Naph treatment enhances IR-induced cell cycle arrest and death in MCF-7 human breast cancer cells through the p53-dependent p21 activation mechanism. These results suggest that Naph might sensitize breast cancer cells to radiotherapy by enhancing the p53-p21 mechanism activity.
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Affiliation(s)
- Min Young Kim
- Research Center, Dongnam Institute of Radiological and Medical Science (DIRAMS), Busan 619-953, Republic of Korea
| | - Seong-Joon Park
- Research Center, Dongnam Institute of Radiological and Medical Science (DIRAMS), Busan 619-953, Republic of Korea
| | - Jae Woong Shim
- Research Center, Dongnam Institute of Radiological and Medical Science (DIRAMS), Busan 619-953, Republic of Korea
| | - Kwangmo Yang
- Research Center, Dongnam Institute of Radiological and Medical Science (DIRAMS), Busan 619-953, Republic of Korea
| | - Ho Sung Kang
- Department of Molecular Biology, College of Natural Sciences, Pusan National University, Busan 609-735, Republic of Korea
| | - Kyu Heo
- Research Center, Dongnam Institute of Radiological and Medical Science (DIRAMS), Busan 619-953, Republic of Korea
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76
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Park SJ, Oh J, Kim YK, Park JH, Park JY, Hong HK, Park KH, Lee JE, Kim HM, Chung JY, Woo SJ. Intraocular pharmacokinetics of intravitreal vascular endothelial growth factor-Trap in a rabbit model. Eye (Lond) 2015; 29:561-8. [PMID: 25592118 DOI: 10.1038/eye.2014.329] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 12/07/2014] [Indexed: 12/22/2022] Open
Abstract
PURPOSE To determine intraocular pharmacokinetic properties of intravitreally injected vascular endothelial growth factor (VEGF)-Trap in a rabbit model. METHODS VEGF-Trap was intravitreally injected in 18 rabbit eyes. Eyes were enucleated 1 h and 1, 2, 5, 14, and 30 days after injections and immediately frozen at -80 °C. Concentration of VEGF-Trap in vitreous, aqueous humor, and retina/choroid was determined using an indirect enzyme-linked immunosorbent assay and analyzed to obtain pharmacokinetic properties. RESULTS Maximum concentration of VEGF-Trap was achieved at 1 h in all three tissues. A one-compartment model of distribution was selected as the final model for all tissues studied. Estimated half-life of VEGF-Trap in vitreous, aqueous humor, and retinal/choroid was 87.1, 36.8, and 35.0 h, respectively, and estimated mean residence time was 125.7, 53.1, and 50.5 h, respectively. Area under the curve from time 0 to the end point was 10009.8, 3945.1, and 1189.3, respectively. Total exposure of the aqueous humor and retina/choroid to VEGF-Trap was 39.4% and 11.9% of vitreous exposure, respectively. CONCLUSION The vitreous half-life of VEGF-Trap is 3.63 days. This is shorter than that of bevacizumab (6.99 days) and longer than that of ranibizumab (2.51 days), as shown in studies using the same experimental settings. The concentration of VEGF-Trap peaked at 1 h after injections in all eye tissues studied.
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Affiliation(s)
- S J Park
- Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - J Oh
- Department of Clinical Pharmacology and Therapeutics, Seoul National University College of Medicine and Bundang Hospital, Seongnam, Republic of Korea
| | - Y-K Kim
- Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - J H Park
- Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - J Y Park
- Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - H K Hong
- Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - K H Park
- Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - J-E Lee
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
| | - H M Kim
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
| | - J Y Chung
- Department of Clinical Pharmacology and Therapeutics, Seoul National University College of Medicine and Bundang Hospital, Seongnam, Republic of Korea
| | - S J Woo
- Department of Ophthalmology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
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77
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Kim SH, Kim YK, Lee SD, Park SJ. Successful living donor liver transplantation between septuagenarians. Am J Transplant 2015; 15:274-7. [PMID: 25331693 DOI: 10.1111/ajt.13020] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Revised: 07/21/2014] [Accepted: 08/07/2014] [Indexed: 01/25/2023]
Abstract
We report a case of a 76-year-old female who underwent living donor right hepatectomy for her 75-year-old husband with recurrent hepatocellular carcinoma. With her voluntary decision, full medical and psychiatric assessment was performed. The operative time was 130 min in the donor and 399 min in the recipient. Both the donor and recipient had an uneventful recovery and were discharged on days 7 and 10, respectively with normal liver function. The couple has had no complication so far and is currently doing well in good health 26 months after living donor liver transplantation.
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Affiliation(s)
- S H Kim
- National Cancer Center, Goyang-si, Gyeonggi-do, Republic of Korea
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78
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Jung YD, Shim JW, Park SJ, Choi SH, Yang K, Heo K, Park MT. Downregulation of UHRF1 promotes EMT via inducing CXCR4 in human cancer cells. Int J Oncol 2014; 46:1232-42. [PMID: 25572953 DOI: 10.3892/ijo.2014.2813] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Accepted: 12/01/2014] [Indexed: 12/14/2022] Open
Abstract
Activation of epithelial-mesenchymal transition (EMT) is important for malignant tumor progression exhibiting migratory and invasive properties. UHRF1 (ubiquitin-like, with PHD and RING finger domains 1), as an epigenetic regulator, plays a crucial role in DNA CpG methylation, chromatin remodeling and gene expression. Many studies demonstrated that UHRF1 is aberrantly expressed in various types of human cancer. However, the precise role of UHRF1 in human cancers remains highly controversial. In the present study, we found that downregulation of UHRF1 enhances the migratory and invasive properties of human cancer cells by inducing EMT, and that the CXCR4 signaling pathway is strictly necessary for UHRF1 deficiency-mediated induction of EMT. Downregulation of UHRF1 induced the expression of the EMT-regulating transcription factors, Zeb1, Slug and Snail and then led to decreased protein level of E-cadherin, and increased protein level of N-cadherin and vimentin, including increased migratory and invasive properties of human cancer cells. In addition, siRNA targeting of Zeb1 or Snail effectively attenuated UHRF1 deficiency-induced EMT, but siRNA targeting of Slug did not, indicating that Zeb1 and Snail play key roles in this event. Moreover, downregulation of UHRF1 induced the expression of CXCR4 in HepG2 cells. siRNA targeting of CXCR4 greatly suppressed the UHRF1 deficiency-induced EMT, as evidenced by a reversal of expression patterns of Snail and Zeb1, and by reduced migratory and invasive properties of HepG2 cells. In conclusion, our results demonstrate that downregulation of UHRF1 contributes to the induction of EMT in human cancer cells via the activation of CXCR4 signaling pathway. Our observation also suggests that UHRF1 may play a pivotal role in suppressing the malignant alteration of cancer cells.
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Affiliation(s)
- Yi-Deun Jung
- Research Center, Dongnam Institute of Radiological and Medical Sciences (DIRAMS), Busan 619-953, Republic of Korea
| | - Jae-Woong Shim
- Research Center, Dongnam Institute of Radiological and Medical Sciences (DIRAMS), Busan 619-953, Republic of Korea
| | - Seong-Joon Park
- Research Center, Dongnam Institute of Radiological and Medical Sciences (DIRAMS), Busan 619-953, Republic of Korea
| | - Si Ho Choi
- Research Center, Dongnam Institute of Radiological and Medical Sciences (DIRAMS), Busan 619-953, Republic of Korea
| | - Kwangmo Yang
- Research Center, Dongnam Institute of Radiological and Medical Sciences (DIRAMS), Busan 619-953, Republic of Korea
| | - Kyu Heo
- Research Center, Dongnam Institute of Radiological and Medical Sciences (DIRAMS), Busan 619-953, Republic of Korea
| | - Moon-Taek Park
- Research Center, Dongnam Institute of Radiological and Medical Sciences (DIRAMS), Busan 619-953, Republic of Korea
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79
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Abstract
We demonstrated sensitive detection of individual yeast cells and yeast films by using slot antenna arrays operating in the terahertz frequency range. Microorganisms located at the slot area cause a shift in the resonant frequency of the THz transmission. The shift was investigated as a function of the surface number density for a set of devices fabricated on different substrates. In particular, sensors fabricated on a substrate with relatively low permittivity demonstrate higher sensitivity. The frequency shift decreases with increasing slot antenna width for a fixed coverage of yeast film, indicating a field enhancement effect. Furthermore, the vertical range of the effective sensing volume has been studied by varying the thickness of the yeast film. The resonant frequency shift saturates at 3.5 μm for a slot width of 2 μm. In addition, the results of finite-difference time-domain simulations are in good agreement with our experimental data.
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80
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Choi YJ, Park MI, Park SJ, Moon W, Kim SE, Kwon HJ, Kim JH, Jeon WS. The effect of water bolus temperature on esophageal motor function as measured by high-resolution manometry. Neurogastroenterol Motil 2014; 26:1628-34. [PMID: 25307526 DOI: 10.1111/nmo.12441] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Accepted: 08/19/2014] [Indexed: 02/08/2023]
Abstract
BACKGROUND Ingestion of cold fluids may induce pain in patients with esophageal motility disorders. Hot fluids, on the other hand, may help to relieve pain. We studied changes in esophageal motility as a variable of water bolus temperature using high-resolution manometry (HRM) in healthy human. METHODS Thirty-two healthy subjects were recruited at Kosin University Hospital. HRM was performed in a sitting position, with room temperature (RT, 25 °C), hot (45 °C), and cold (2 °C) water swallowed in that order. This exam included single swallowing (10 swallows of 5 mL water, 30 s intervals) and multiple water swallows (MWS; 100 mL water within 30 s). KEY RESULTS In the single swallowing, hot water caused a decrease in lower esophageal sphincter (LES) residual pressure (5.87 ± 4.20 mmHg vs 7.45 ± 4.17 mmHg (RT), p = 0.001) and duration of esophageal body (EB) contraction (3.01 ± 0.80 s vs 3.15 ± 1.16 s (RT), p = 0.009). Cold water caused an increase in the duration of EB contraction (3.52 ± 0.87 s vs 3.15 ± 1.16 s (RT), p = 0.001) and a decrease in contractile front velocity (CFV) (4.43 ± 1.50 cm/s vs 4.90 ± 2.53 cm/s (RT), p = 0.007). Similarly, in the MWS, hot water caused a decrease in the duration of EB contraction (12.95 ± 5.02 s vs 16.33 ± 5.94 s (RT), p = 0.024) and an increase in the amplitude of EB contraction (114.27 ± 83.36 mmHg vs 82.70 ± 46.77 mmHg (RT), p = 0.007). Cold water caused an increase in the duration of EB contraction (27.38 ± 2.89 s vs 16.33 ± 5.94 s (RT), p = 0.03) and a decrease in the amplitude of EB contraction (51.68 ± 33.94 mmHg vs 82.70 ± 46.77 mmHg (RT), p = 0.001). CONCLUSIONS & INFERENCES This study showed changes in esophageal motility to be dependent on water temperature. Especially, MWS showed clear changes in esophageal motility at different temperatures of water.
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Affiliation(s)
- Y J Choi
- Department of Internal Medicine, Kosin University College of Medicine, Busan, South Korea
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81
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Yoon S, Park SJ, Han JH, Kang JH, Kim JH, Lee J, Park S, Shin HJ, Kim K, Yun M, Chwae YJ. Caspase-dependent cell death-associated release of nucleosome and damage-associated molecular patterns. Cell Death Dis 2014; 5:e1494. [PMID: 25356863 PMCID: PMC4649531 DOI: 10.1038/cddis.2014.450] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Revised: 08/05/2014] [Accepted: 08/07/2014] [Indexed: 12/12/2022]
Abstract
Apoptosis, which is anti-inflammatory, and necrosis, which is pro-inflammatory, represent the extremes of the cell death spectrum. Cell death is complex and both apoptosis and necrosis can be observed in the same cells or tissues. Here, we introduce a novel combined mode of cellular demise--caspase-dependent regulated necrosis. Most importantly, it is mainly characterized with release of marked amount of oligo- or poly-nucleosomes and their attached damage-associated molecular patterns (DAMPs) and initiated by caspase activation. Caspase-activated DNase has dual roles in nucleosomal release as it can degrade extracellularly released chromatin into poly- or oligo-nucleosomes although it prohibits release of nucleosomes. In addition, osmotically triggered water movement following Cl(-) influx and subsequent Na(+) influx appears to be the major driving force for nucleosomal and DAMPs release. Finally, Ca(2+)-activated cysteine protease, calpain, is an another essential factor in nucleosomal and DAMPs release because of complete reversion to apoptotic morphology from necrotic one and blockade of nucleosomal and DAMPs release by its inhibition.
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Affiliation(s)
- S Yoon
- 1] Department of Microbiology, Ajou University School of Medicine, Suwon, Korea [2] Department of Biomedical Sciences, Ajou University, Suwon, Korea
| | - S J Park
- 1] Department of Microbiology, Ajou University School of Medicine, Suwon, Korea [2] Department of Biomedical Sciences, Ajou University, Suwon, Korea
| | - J H Han
- Department of Pathology, Ajou University School of Medicine, Suwon, Korea
| | - J H Kang
- 1] Department of Microbiology, Ajou University School of Medicine, Suwon, Korea [2] Department of Biomedical Sciences, Ajou University, Suwon, Korea
| | - J-h Kim
- Electron Microscopy Laboratory, Eulji University, Seongnam, Korea
| | - J Lee
- Bio-Medical Science Co. Ltd, Seoul, Korea
| | - S Park
- 1] Department of Microbiology, Ajou University School of Medicine, Suwon, Korea [2] Department of Biomedical Sciences, Ajou University, Suwon, Korea
| | - H-J Shin
- 1] Department of Microbiology, Ajou University School of Medicine, Suwon, Korea [2] Department of Biomedical Sciences, Ajou University, Suwon, Korea
| | - K Kim
- 1] Department of Microbiology, Ajou University School of Medicine, Suwon, Korea [2] Department of Biomedical Sciences, Ajou University, Suwon, Korea
| | - M Yun
- Department of Nuclear Medicine, College of Medicine, Yonsei University, Seoul, Korea
| | - Y-J Chwae
- 1] Department of Microbiology, Ajou University School of Medicine, Suwon, Korea [2] Department of Biomedical Sciences, Ajou University, Suwon, Korea
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Shon JH, Kim N, Park SJ, Oh MK, Kim EY, Lee SH, Kim YH, Shin JG. Effect of renal impairment and haemodialysis on the pharmacokinetics of gemigliptin (LC15-0444). Diabetes Obes Metab 2014; 16:1028-31. [PMID: 24641348 DOI: 10.1111/dom.12292] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Revised: 02/13/2014] [Accepted: 03/08/2014] [Indexed: 12/19/2022]
Abstract
This study evaluated the effects of renal impairment (RI) and haemodialysis (HD) on the pharmacokinetics of gemigliptin, a novel dipeptidyl peptidase-4 (DPP-4) inhibitor. After a 100 mg administration to subjects with normal renal function (n = 23) or RI (n = 24), plasma, urine or dialysate samples were analysed. Control subjects were matched to patients based on age, gender and body mass index. Patients with mild, moderate, severe RI and end-stage renal disease (ESRD) showed 1.20, 2.04, 1.50 and 1.66-fold (1.10, 1.49, 1.22 and 1.21-fold) increase of mean area under the time-plasma concentration curve from 0 to infinity (AUCinf) [maximum plasma concentration (Cmax)] of gemigliptin, respectively. Pharmacokinetics of gemigliptin was comparable between HD and non-HD periods in ESRD patients. Less than 4% of the dose was removed by 4 h HD. RI appeared to have modest effect on the gemigliptin disposition. No dose adjustment in patients with RI is proposed on the basis of exposure-response relationship. Impact of HD on the removal of gemigliptin was negligible.
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Affiliation(s)
- J H Shon
- Department of Pharmacology, Inje University College of Medicine, Busan, South Korea; Department of Clinical Pharmacology and Clinical Trial Center, Busan Paik Hospital, Busan, South Korea
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83
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Kwon D, Saadeldin IM, Kim SJ, Park SJ, Kang JT, Park HJ, Moon JH, Koo OJ, Jang G, Lee BC. Optimizing electrical activation of porcine oocytes by adjusting pre- and post-activation mannitol exposure times. Reprod Domest Anim 2014; 49:995-9. [PMID: 25256295 DOI: 10.1111/rda.12420] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Accepted: 08/10/2014] [Indexed: 11/29/2022]
Abstract
Modifying electrical activation conditions have been used to improve in vitro embryo production and development in pigs. However, there is insufficient information about correlations of porcine embryo development with oocyte pre- and post-activation conditions. The purpose of this study was to compare the developmental rates of porcine oocytes subjected to different mannitol exposure times, either pre- or post-electrical activation, and to elucidate the reason for the optimal mannitol exposure time. Mannitol exposure times around activation were adjusted as 0, 1, 2 or 3 min. Blastocyst development were checked on day 7. Exposure of oocytes to mannitol for 1 or 2 min before electrical activation produced significantly higher blastocyst rates than exposure for 0 or 3 min. There was no significant difference in blastocyst rates when activated oocytes were exposed to mannitol for 0, 1, 2 or 3 min after electrical activation. While exposure of oocytes to mannitol for 1 min pre- and 3 min post-activation showed significantly higher blastocyst development than 0 min pre- and 0 min post-activation. It also showed higher maintenance of normal oocyte morphology than exposure for 0 min pre- and 0 min post-activation. In conclusion, exposure of oocytes to mannitol for 1 min pre- and 3 min post-activation seems to be optimal for producing higher in vitro blastocyst development of porcine parthenogenetic embryos. The higher blastocyst development is correlated with higher maintenance of normal morphology in oocytes exposed to mannitol for 1 min pre- and 3 min post-activation.
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Affiliation(s)
- D Kwon
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
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84
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Jun YJ, Park SJ, Hwang JW, Kim TH, Jung KJ, Jung JY, Hwang GH, Lee SH, Lee SH. Differential expression of 11β-hydroxysteroid dehydrogenase type 1 and 2 in mild and moderate/severe persistent allergic nasal mucosa and regulation of their expression by Th2 cytokines: asthma and rhinitis. Clin Exp Allergy 2014; 44:197-211. [PMID: 24447082 DOI: 10.1111/cea.12195] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Revised: 08/15/2013] [Accepted: 08/26/2013] [Indexed: 11/28/2022]
Abstract
BACKGROUND Glucocorticoids are used to treat allergic rhinitis, but the mechanisms by which they induce disease remission are unclear. 11β-hydroxysteroid dehydrogenase (11β-HSD) is a tissue-specific regulator of glucocorticoid responses, inducing the interconversion of inactive and active glucocorticoids. OBJECTIVE We analysed the expression and distribution patterns of 11β-HSD1, 11β-HSD2, and steroidogenic enzymes in normal and allergic nasal mucosa, and cytokine-driven regulation of their expression. The production levels of cortisol in normal, allergic nasal mucosa and in cultured epithelial cells stimulated with cytokines were also determined. METHODS The expression levels of 11β-HSD1, 11β-HSD2, steroidogenic enzymes (CYP11B1, CYP11A1), and cortisol in normal, mild, and moderate/severe persistent allergic nasal mucosa were assessed by real-time PCR, Western blot, immunohistochemistry, and ELISA. The expression levels of 11β-HSD1, 11β-HSD2, CYP11B1, CYP11A1, and cortisol were also determined in cultured nasal epithelial cell treated with IL-4, IL-5, IL-13, IL-17A, and IFN-γ. Conversion ratio of cortisone to cortisol was evaluated using siRNA technique, 11β-HSD1 inhibitor, and the measurement of 11β-HSD1 activity. RESULTS The expression levels of 11β-HSD1, CYP11B1, and cortisol were up-regulated in mild and moderate/severe persistent allergic nasal mucosa. By contrast, 11β-HSD2 expression was decreased in allergic nasal mucosa. In cultured epithelial cells treated with IL-4, IL-5, IL-13, and IL-17A, 11β-HSD1 expression and activity increased in parallel with the expression levels of CYP11B1 and cortisol, but the production of 11β-HSD2 decreased. CYP11A1 expression level was not changed in allergic nasal mucosa or in response to stimulation with cytokines. SiRNA technique or the measurement of 11β-HSD1 activity showed that nasal epithelium activates cortisone to cortisol in a 11β-HSD-dependent manner. CONCLUSIONS AND CLINICAL RELEVANCE These results indicate that the localized anti-inflammatory effects of glucocorticoids are regulated by inflammatory cytokines, which can modulate the expression of 11β-HSD1, 11β-HSD2, and CYP11B1, and by the intracellular concentrations of bioactive glucocorticoids.
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Affiliation(s)
- Y J Jun
- Department of Otorhinolaryngology-Head & Neck Surgery, College of Medicine, Korea University, Seoul, Korea
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85
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86
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Jung M, Park SJ, Kim HS, Kim JB, Kim KS, Kwon SH, Oh JH, Kim WS. Recurrent syncope associated with idiopathic jugular vein stenosis. Report of a young female patient. Herz 2014; 40:722-4. [PMID: 24938218 DOI: 10.1007/s00059-014-4074-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2013] [Revised: 11/15/2013] [Accepted: 02/04/2014] [Indexed: 10/25/2022]
Affiliation(s)
- M Jung
- Division of Cardiology, Department of Internal Medicine, Kyung Hee University Hospital, Kyung Hee University School of Medicine, 23, Kyung Hee University-ro, Dongdaemoon-gu, 130-872, Seoul, Republic of Korea
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87
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Choi YJ, Park MI, Park SJ, Moon W, Kim SE, Yoo CH, Kwon HJ. Relationship between multiple water swallows and gastroesophageal reflux in patients with normal esophageal motility. Dis Esophagus 2014; 28:520-3. [PMID: 24898795 DOI: 10.1111/dote.12232] [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] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Multiple water swallows (MWS) stimulates neural inhibition, resulting in abolition of contractions in the esophageal body and complete lower esophageal sphincter relaxation, which is followed by peristalsis and the lower esophageal sphincter contraction. We assessed the relationship between MWS and gastroesophageal reflux in patients with esophageal symptoms and with normal findings by high-resolution manometry (HRM). We retrospectively reviewed the clinical records of patients who underwent HRM and a 24-hour ambulatory impedance-pH study. Correlation between the findings of the impedance-pH study and abnormal MWS responses without motility disorders was evaluated. Independent t-tests were used for statistical analysis. Of 28 patients, 20 (71%) had abnormal MWS responses: four (20%) had abnormal responses during MWS, six (30%) had abnormal responses after MWS, and 10 (50%) had abnormal responses both during and after MWS. Total acid exposure times were significantly longer in patients with abnormal MWS responses than in patients with normal MWS responses. In particular, upright acid exposure time and all reflux percent times were significantly longer in patients with abnormal MWS responses. However, bolus clearance time and longest reflux episode were not different between the two groups. Abnormal MWS responses predicted increased acid exposure times in patients with normal findings of HRM by the Chicago classification.
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Affiliation(s)
- Y J Choi
- Department of Internal Medicine, Kosin University College of Medicine, Busan, South Korea
| | - M I Park
- Department of Internal Medicine, Kosin University College of Medicine, Busan, South Korea
| | - S J Park
- Department of Internal Medicine, Kosin University College of Medicine, Busan, South Korea
| | - W Moon
- Department of Internal Medicine, Kosin University College of Medicine, Busan, South Korea
| | - S E Kim
- Department of Internal Medicine, Kosin University College of Medicine, Busan, South Korea
| | - C H Yoo
- Department of Internal Medicine, Kosin University College of Medicine, Busan, South Korea
| | - H J Kwon
- Department of Internal Medicine, Kosin University College of Medicine, Busan, South Korea
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Park SJ, Hong JT, Choi SJ, Kim HS, Park WK, Han ST, Park JY, Lee S, Kim DS, Ahn YH. Detection of microorganisms using terahertz metamaterials. Sci Rep 2014; 4:4988. [PMID: 24832607 PMCID: PMC4023130 DOI: 10.1038/srep04988] [Citation(s) in RCA: 108] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Accepted: 04/28/2014] [Indexed: 12/23/2022] Open
Abstract
Microorganisms such as fungi and bacteria cause many human diseases and therefore rapid and accurate identification of these substances is essential for effective treatment and prevention of further infections. In particular, contemporary microbial detection technique is limited by the low detection speed which usually extends over a couple of days. Here we demonstrate that metamaterials operating in the terahertz frequency range shows promising potential for use in fabricating the highly sensitive and selective microbial sensors that are capable of high-speed on-site detection of microorganisms in both ambient and aqueous environments. We were able to detect extremely small amounts of the microorganisms, because their sizes are on the same scale as the micro-gaps of the terahertz metamaterials. The resonant frequency shift of the metamaterials was investigated in terms of the number density and the dielectric constants of the microorganisms, which was successfully interpreted by the change in the effective dielectric constant of a gap area.
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Affiliation(s)
- S J Park
- Department of Physics and Division of Energy Systems Research, Ajou University, Suwon 443-749, Korea
| | - J T Hong
- Department of Physics and Division of Energy Systems Research, Ajou University, Suwon 443-749, Korea
| | - S J Choi
- Department of Biological Science, Ajou University, Suwon 443-749, Korea
| | - H S Kim
- Department of Biological Science, Ajou University, Suwon 443-749, Korea
| | - W K Park
- Advanced Medical Device Research Center, Korea Electrotechnology Research Institute, Ansan 426-170, Korea
| | - S T Han
- Advanced Medical Device Research Center, Korea Electrotechnology Research Institute, Ansan 426-170, Korea
| | - J Y Park
- Department of Physics and Division of Energy Systems Research, Ajou University, Suwon 443-749, Korea
| | - S Lee
- Department of Physics and Division of Energy Systems Research, Ajou University, Suwon 443-749, Korea
| | - D S Kim
- Center for Subwavelength Optics and Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea
| | - Y H Ahn
- Department of Physics and Division of Energy Systems Research, Ajou University, Suwon 443-749, Korea
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89
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Oh HJ, Park SJ, Lim JY, Cho NK, Song JD, Lee W, Lee YJ, Myoung JM, Choi WJ. Fabrication of GaAs/Al0.3Ga0.7As multiple quantum well nanostructures on (100) si substrate using a 1-nm InAs relief layer. J Nanosci Nanotechnol 2014; 14:2984-2989. [PMID: 24734721 DOI: 10.1166/jnn.2014.8593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Nanometer scale thin InAs layer has been incorporated between Si (100) substrate and GaAs/Al0.3Ga0.7As multiple quantum well (MQW) nanostructure in order to reduce the defects generation during the growth of GaAs buffer layer on Si substrate. Observations based on atomic force microscopy (AFM) and transmission electron microscopy (TEM) suggest that initiation and propagation of defect at the Si/GaAs interface could be suppressed by incorporating thin (1 nm in thickness) InAs layer. Consequently, the microstructure and resulting optical properties improved as compared to the MQW structure formed directly on Si substrate without the InAs layer. It was also observed that there exists some limit to the desirable thickness of the InAs layer since the MQW structure having thicker InAs layer (4 nm-thick) showed deteriorated properties.
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90
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Park MH, Kim HS, Park SJ, Song JD, Kim SH, Lee YJ, Choi WJ, Park JH. Effect of growth temperature and quantum structure on InAs/GaAs quantum dot solar cell. J Nanosci Nanotechnol 2014; 14:2955-2959. [PMID: 24734716 DOI: 10.1166/jnn.2014.8639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
InGaAs-capped InAs quantum dots (QDs) and InAs QDs were adopted for the study of the effects through growth temperature and the band structure of InAs QDs on the performance of GaAs-based QD solar cell. It has been shown that the defects due to low temperature growth resulted in the decrease of Voc, Jsc and external quantum efficiency for GaAs bulk solar cell and QD embedded solar cells. It has been also found that InAs QDs act as defects by trapping photo-generated carries which affect the carrier transport in QD solar cell. The QD solar cell with InGaAs-capped InAs QDs showed higher performance than the QD solar cell with only InAs QDs. Such result has been explained by photo-generated carrier trapping and tunneling through InGaAs QW state in InGaAs-capped InAs QDs.
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91
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Park YM, Jang JW, Yoo SH, Kim SH, Oh IM, Park SJ, Jang YS, Lee SJ. Combinations of eight key mutations in the X/preC region and genomic activity of hepatitis B virus are associated with hepatocellular carcinoma. J Viral Hepat 2014; 21:171-7. [PMID: 24344773 DOI: 10.1111/jvh.12134] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Accepted: 06/09/2013] [Indexed: 12/16/2022]
Abstract
Accumulation of eight key mutations located in the X/preC regions of the hepatitis B virus (HBV) genome (G1613A, C1653T, T1753V, A1762T, G1764A, A1846T, G1896A and G1899A) is a risk marker for the development of hepatocellular carcinoma (HCC). In this study, we analysed the 8 key mutations in 442 serum samples collected from 310 non-HCC and 132 HCC patients to identify the combinations linked to HCC. After the patients were stratified according to the age groups and mutation combinations, clinical parameters were compared between the HCC and the non-HCC groups. Analyses were focused on patient ≥40 years of age infected by HBV genotype C with A1762T and G1764A mutations in the basal core promoter region (BCP double mutation). In patients with ≥6 mutations, the combination of [G1613A + C1653T + A1846T + G1896A] mutations was closely linked to HCC, whereas no specific single or double mutation combination was associated with HCC. In patients with ≤5 mutations, HBeAg and HBV DNA serum titres were lower in the HCC group than those in the non-HCC group. Unlike the number of mutations, no specific combination correlated with advanced clinical stage in HCC. Of the BCP double mutation-based HBV mutant types, combinations of ≥6 mutations that include G1613A + C1653T + A1846T + G1896A, and combinations of ≤5 mutations with reduced HBeAg production, may be more specific indicators of HCC risk than only the number of mutations or any specific combination(s).
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Affiliation(s)
- Y M Park
- Hepatology Center, Bundang Jesaeng General Hospital, Seongnam-si, Korea; DMC Biomedical Research Center of Daejin Medical Center, Bundang Jesaeng General Hospital, Seongnam-si, Korea
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92
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Emma P, Venturini M, Bane KLF, Stupakov G, Kang HS, Chae MS, Hong J, Min CK, Yang H, Ha T, Lee WW, Park CD, Park SJ, Ko IS. Experimental demonstration of energy-chirp control in relativistic electron bunches using a corrugated pipe. Phys Rev Lett 2014; 112:034801. [PMID: 24484143 DOI: 10.1103/physrevlett.112.034801] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Indexed: 06/03/2023]
Abstract
The first experimental study is presented of a corrugated wall device that uses wakefields to remove a linear energy correlation in a relativistic electron beam (a "dechirper"). Time-resolved measurements of both longitudinal and transverse wakefields of the device are presented and compared with simulations. This study demonstrates the feasibility to employ a dechirper for precise control of the beam phase space in the next generation of free-electron-lasers.
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Affiliation(s)
- P Emma
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - M Venturini
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - K L F Bane
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - G Stupakov
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - H-S Kang
- Pohang Accelerator Laboratory, Pohang 790-784, Republic of Korea
| | - M S Chae
- Pohang Accelerator Laboratory, Pohang 790-784, Republic of Korea
| | - J Hong
- Pohang Accelerator Laboratory, Pohang 790-784, Republic of Korea
| | - C-K Min
- Pohang Accelerator Laboratory, Pohang 790-784, Republic of Korea
| | - H Yang
- Pohang Accelerator Laboratory, Pohang 790-784, Republic of Korea
| | - T Ha
- Pohang Accelerator Laboratory, Pohang 790-784, Republic of Korea
| | - W W Lee
- Pohang Accelerator Laboratory, Pohang 790-784, Republic of Korea
| | - C D Park
- Pohang Accelerator Laboratory, Pohang 790-784, Republic of Korea
| | - S J Park
- Pohang Accelerator Laboratory, Pohang 790-784, Republic of Korea
| | - I S Ko
- Pohang Accelerator Laboratory, Pohang 790-784, Republic of Korea
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93
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Nguyen VG, Kim HK, Moon HJ, Park SJ, Chung HC, Choi MK, Park BK. Evolutionary Dynamics of a Highly Pathogenic Type 2 Porcine Reproductive and Respiratory Syndrome Virus: Analyses of Envelope Protein-Coding Genes. Transbound Emerg Dis 2013; 62:411-20. [PMID: 23981823 DOI: 10.1111/tbed.12154] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Indexed: 11/30/2022]
Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV) has long been an economically devastating swine viral disease. The recent emergence of a highly pathogenic type 2 PRRSV with high mobility and mortality in China, spreading in Vietnam, Laos, and Thailand has placed neighbouring countries at risk. This study applied a codon-based extension of the Bayesian relaxed clock model and the fixed effects maximum-likelihood method to investigate and compare the evolutionary dynamics of type 2 PRRSV for all of known structural envelope protein-coding genes. By comparing the highly pathogenic type 2 PRRSV clade against the typical type 2 PRRSV clade, this study demonstrated that the highly pathogenic clade evolved at high rates in all of the known structural genes but did not display rapid evolutionary dynamics compared with typical type 2 PRRSV. In contrast, the ORF3, ORF5 and ORF6 genes of the highly pathogenic clade evolved in a qualitatively different manner from the genes of the typical clade. At the population level, several codons of the sequence elements that were involved in viral neutralization, as well as codons that were associated with in vitro attenuation/over-attenuation, were predicted to be selected differentially between the typical clade and the highly pathogenic clade. The results of this study suggest that the multigenic factors of the envelope protein-coding genes contribute to diversifying the biological properties (virulence, antigenicity, etc.) of the highly pathogenic clade compared with the typical clade of type 2 PRRSV.
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Affiliation(s)
- V G Nguyen
- Department of Veterinary Medicine Virology Laboratory, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea.,Department of Veterinary Microbiology and Infectious Diseases, Faculty of Veterinary Medicine, Hanoi University of Agriculture, Hanoi, Vietnam
| | - H K Kim
- Research Evaluation Team, Institute for Basic Science, Daejeon, Korea
| | - H J Moon
- Research Unit, Green Cross Veterinary Products, Yongin, Korea
| | - S J Park
- Viral Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Korea
| | - H C Chung
- Department of Veterinary Medicine Virology Laboratory, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - M K Choi
- Department of Veterinary Medicine Virology Laboratory, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
| | - B K Park
- Department of Veterinary Medicine Virology Laboratory, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
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94
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Song JW, Shim JK, Song Y, Yang SY, Park SJ, Kwak YL. Effect of ketamine as an adjunct to intravenous patient-controlled analgesia, in patients at high risk of postoperative nausea and vomiting undergoing lumbar spinal surgery. Br J Anaesth 2013; 111:630-5. [PMID: 23744819 DOI: 10.1093/bja/aet192] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [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: 11/14/2022] Open
Abstract
BACKGROUND We evaluated the effect of ketamine as an adjunct to a fentanyl-based i.v. patient-controlled analgesia (IV-PCA) on postoperative nausea and vomiting (PONV) in patients at high risk of PONV undergoing lumbar spinal surgery. METHODS Fifty non-smoking female patients were evenly randomized to either the control or ketamine group. According to randomization, patients received either ketamine 0.3 mg kg(-1) i.v. or normal saline after anaesthetic induction with fentanyl-based IV-PCA either with or without ketamine mixture (3 mg kg(-1) in 180 ml). The incidence and severity of PONV, volume of IV-PCA consumed, and pain intensity were assessed in the postanaesthesia care unit, and at postoperative 6, 12, 24, 36, and 48 h. RESULTS The overall incidence of PONV during the first 48 h after surgery was similar between the two groups (68 vs 56%, ketamine and control group, P=0.382). The total dose of fentanyl used during the first 48 h after operation was lower in the ketamine group than in the control group [mean (SD), 773 (202) μg vs 957 (308) μg, P=0.035]. The intensity of nausea (11-point verbal numerical rating scale) was higher in the ketamine group during the first 6 h after operation [median (interquartile range), 6 (3-7) vs 2 (1.5-3.5), P=0.039], postoperative 12-24 h [5 (4-7) vs 2 (1-3), P=0.014], and postoperative 36-48 h [5 (4-7) vs 2 (1-3), P=0.036]. Pain intensities were similar between the groups. CONCLUSIONS Ketamine did not reduce the incidence of PONV and exerted a negative influence on the severity of nausea. It was, however, able to reduce postoperative fentanyl consumption in patients at high-risk of PONV.
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Affiliation(s)
- J W Song
- Department of Anaesthesiology and Pain Medicine and
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95
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Park SJ, Kwon H, Park SK, Kim DS, Park DS. Comparative Insect Faunas between Ganghwado and Six Others Islands of West Coastal in Incheon, Korea. Journal of Asia-Pacific Biodiversity 2013. [DOI: 10.7229/jkn.2013.6.2.197] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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96
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Park SJ, Shin JI. Another beneficial effect of rituximab on refractory ANCA-associated vasculitis: the role of interleukin-17 suppression? Scand J Immunol 2013; 77:221. [PMID: 23298391 DOI: 10.1111/sji.12025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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97
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Hwang JY, Han SH, Park SH, Park SJ, Park S, Oh SH, Kim JH. Interrupting gel layer between Double cuffs prevents fluid leakage past tracheal tube cuffs. Br J Anaesth 2013; 111:496-504. [PMID: 23670722 DOI: 10.1093/bja/aet152] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Current tracheal tubes (TTs) cannot guarantee a perfect seal against pulmonary aspiration of upper airway secretions. The purpose of this study was to investigate whether a gel layer between the tracheal tube with double cuffs (Double cuffs) prevents fluid leakage past TT cuffs. METHODS In vitro fluid leakage tests were performed using the Double cuff with or without a gel layer between the two cuffs and four commercially available TTs (Euromedical Standard TT, Mallinckrodt Hi-Lo™, Microcuff, and Mallinckrodt TaperGuard™) when placed in artificial tracheas with three-different internal diameters (ID; 16, 20, and 22 mm). Blue-dyed water (5 ml) was placed above the cuff, and the extent of fluid leakage was observed for 48 h. Each test was repeated five times with new tubes at six different intracuff pressures (15, 20, 25, 30, 40, and 50 cm H2O). RESULTS In all of the conventional TTs and the Double cuff without a gel layer, fluid leakage was observed even at clinically acceptable intracuff pressures (25-30 cm H2O). However, in the Double cuff with a gel layer, no fluid leakage was observed for 48 h at all intracuff pressures in three-different sized artificial tracheas. At an intracuff pressure of 20 cm H2O in a 20 mm ID trachea, the average volume of injected gel was 2.0 ml. After removal of the TT, the mean volume of the remaining gel in the trachea was 0.10 ml. CONCLUSIONS A prototype TT with gel-layered Double cuffs completely blocked fluid leakage past the cuffs for 48 h in a bench-top model. Clinical studies are required to determine whether this TT reduces the risk of ventilator-associated pneumonia.
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Affiliation(s)
- J Y Hwang
- Department of Anesthesiology and Pain Medicine, SMG-SNU Boramae Medical Center, Seoul, Republic of Korea
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98
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Park SJ, Choi HR, Nam KM, Na JI, Huh CH, Park KC. Immediate induction of heat shock proteins is not protective against cryopreservation in normal human fibroblasts. Cryo Letters 2013; 34:239-247. [PMID: 23812313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Heat shock proteins (HSPs) were first identified as proteins whose synthesis was enhanced by stresses, such as increased temperature. HSPs can protect cells from various cytotoxic factors by stabilizing proteins. Thus, it could be hypothesized that heat induced HSPs can provide protective effects against cryopreservation-induced cell death. The aim of this study was to determine whether induction of HSPs can increase the cell viability of normal human fibroblasts after cryopreservation. Cytotoxic effects of heat treatment were tested and the induction of HSPs was assessed by examining time-dependent HSP expression. A cell counting method using fluorescence microscopy was used to determine the viability of cells. In addition, the effects of geranylgeranylacetone were evaluated in terms of HSP expression and cytoskeleton changes. The results of this study showed that immediate induction of HSPs does not protect normal human fibroblasts against cryopreservation-induced cell death possibly by inducing cytoskeleton changes.
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Affiliation(s)
- S J Park
- Department of Dermatology, Seoul National University Bundang Hospital, Gyeonggi-do, Republic of Korea
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99
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Buchanan GL, Chieffo A, Meliga E, Mehran R, Park SJ, Onuma Y, Capranzano P, Valgimigli M, Jegere S, Makkar R, Palacios IF, Kim YH, Buszman P, Charavarty T, Sheiban I, Naber C, Margey R, Agnihotri A, Marra S, Davide D, Leon M, Fajadet J, Lefevre T, Morice MC, Erglis A, Tamburino C, Alfieri O, Serruys PW, Colombo A. 058 THE ROLE OF FEMALE SEX IN THE CONTEMPORARY TREATMENT OF THE LEFT MAIN CORONARY ARTERY INSIGHTS FROM THE W-DELTA (WOMEN-DRUG ELUTING STENT FOR LEFT MAIN CORONARY ARTERY DISEASE) REGISTRY. Heart 2013. [DOI: 10.1136/heartjnl-2013-304019.58] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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100
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Park SJ, Kim JG, Son TG, Yi JM, Kim ND, Yang K, Heo K. The histone demethylase JMJD1A regulates adrenomedullin-mediated cell proliferation in hepatocellular carcinoma under hypoxia. Biochem Biophys Res Commun 2013; 434:722-7. [PMID: 23583388 DOI: 10.1016/j.bbrc.2013.03.091] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2013] [Accepted: 03/26/2013] [Indexed: 11/18/2022]
Abstract
We studied the roles of JMJD1A and its target gene ADM in the growth of hepatocellular carcinomas (HCCs) and breast cancer cells under hypoxic conditions. Hypoxia stimulated HepG2 and Hep3B cell proliferation but had no effect on MDA-MB-231 cell proliferation. Interestingly, the JMJD1A and ADM expressions were enhanced by hypoxia only in HepG2 and Hep3B cells. Our ChIP results showed that hypoxia-induced HepG2 and Hep3B cell proliferation is mediated by JMJD1A upregulation and subsequent decrease in methylation in the ADM promoter region. Furthermore, JMJD1A gene silencing abrogated the hypoxia-induced ADM expression and inhibited HepG2 and Hep3B cell growth. These data suggest that JMJD1A might function as a proliferation regulator in some cancer cell types.
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Affiliation(s)
- Seong-Joon Park
- Research Center, Dongnam Institute of Radiological and Medical Science (DIRAMS), Busan 619-953, Republic of Korea
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