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Zhou Y, Cowling BJ, Wu P, Chan WM, Lee SY, Lau EHY, Schooling CM. Adiposity and influenza-associated respiratory mortality: a cohort study. Clin Infect Dis 2015; 60:e49-57. [PMID: 25645211 DOI: 10.1093/cid/civ060] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2014] [Accepted: 01/17/2015] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Obesity was first noted as a risk factor for severe illness associated with pandemic H1N1 infection in 2009, but the relationship between obesity and seasonal influenza remains unclear. METHODS We used data from a population-based cohort comprising 66 820 older (≥65 years) participants with a follow-up period from 1998 to 2012. The impact of influenza activity on respiratory mortality rates was estimated using a Cox proportional hazards model adjusted for comorbidities, meteorological factors, and other co-circulating respiratory viruses. We also tested whether the association of influenza with respiratory mortality varied with obesity and/or health status. As a control outcome, we similarly assessed the association of influenza with deaths from external causes, because these deaths should be unrelated to influenza. RESULTS Seasonal influenza activity was associated with higher respiratory mortality (hazard ratio [HR], 1.13 for influenza activity in the influenza season vs noninfluenza season; 95% confidence interval [CI], 1.05-1.22). The effect of seasonal influenza was 19% greater in obese individuals than normal-weight individuals (HR, 1.19; 95% CI, 1.01-1.42). The marginally significant and greater effect modification of obesity status on the association between seasonal influenza and respiratory mortality was also observed among older people in good health (HR, 1.35; 95% CI, .97-1.87). No such relations were observed for death from external causes. CONCLUSIONS Obesity aggravates the effect of seasonal influenza on respiratory mortality. Priority for influenza vaccine should be considered for obese older people to decrease the burden of influenza.
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Affiliation(s)
- Ying Zhou
- Infectious Disease Epidemiology Group, School of Public Health, Li Ka Shing Faculty of Medicine, University of Hong Kong
| | - Benjamin J Cowling
- Infectious Disease Epidemiology Group, School of Public Health, Li Ka Shing Faculty of Medicine, University of Hong Kong
| | - Peng Wu
- Infectious Disease Epidemiology Group, School of Public Health, Li Ka Shing Faculty of Medicine, University of Hong Kong
| | - Wai Man Chan
- Department of Health, Hong Kong Government, Hong Kong Special Administrative Region, China
| | - Siu Yin Lee
- Department of Health, Hong Kong Government, Hong Kong Special Administrative Region, China
| | - Eric H Y Lau
- Infectious Disease Epidemiology Group, School of Public Health, Li Ka Shing Faculty of Medicine, University of Hong Kong
| | - C Mary Schooling
- Infectious Disease Epidemiology Group, School of Public Health, Li Ka Shing Faculty of Medicine, University of Hong Kong School of Public Health at Hunter College, City University of New York, New York
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Choi JY, Maniquiz-Redillas MC, Hong JS, Lee SY, Kim LH. Comparison of the treatment performance of hybrid constructed wetlands treating stormwater runoff. Water Sci Technol 2015; 72:2243-2250. [PMID: 26676013 DOI: 10.2166/wst.2015.443] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
This study was conducted to compare the treatment performance of two hybrid constructed wetlands (CWs) in treating stormwater runoff. The hybrid CWs were composed of a combination of free water surface (FWS) and horizontal subsurface flow (HSSF) CWs. Based on the results, strong correlation exists between potential runoff impacts and stormwater characteristics; however, the low correlations also suggest that not only the monitored parameters contribute to stormwater event mean concentrations (EMC) of pollutants, but other factors should also be considered as well. In the hydraulic and treatment performance of the hybrid CWs, a small surface area to catchment area (SA/CA) ratio, receiving a high concentration of influent EMC, will find it hard to achieve great removal efficiency; also a large SA/CA ratio, receiving low concentration of influent EMC, will find it hard to achieve great removal efficiency. With this, SA/CA ratio and influent characteristics such as EMC or load should be considered among the design factors of CWs. The performance data of the two CWs were used to consider the most cost-effective design of a hybrid CW. The optimum facility capacity (ratio of total runoff volume to storage volume) that is applicable for a target volume reduction and removal efficiency was provided in this study.
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Affiliation(s)
- J Y Choi
- Department of Civil and Environmental Engineering, Kongju National University, 1223-254 Cheonan-daero, Seobuk-gu, Cheonan-si, Chungcheongnam-do, 330-717, Republic of Korea E-mail:
| | - M C Maniquiz-Redillas
- Department of Civil and Environmental Engineering, Kongju National University, 1223-254 Cheonan-daero, Seobuk-gu, Cheonan-si, Chungcheongnam-do, 330-717, Republic of Korea E-mail:
| | - J S Hong
- Department of Civil and Environmental Engineering, Kongju National University, 1223-254 Cheonan-daero, Seobuk-gu, Cheonan-si, Chungcheongnam-do, 330-717, Republic of Korea E-mail:
| | - S Y Lee
- Water Environment Research Department, National Institute of Environmental Research, Hwangyeong-ro 42, Seo-gu, Incheon, 404-708, Korea
| | - L H Kim
- Department of Civil and Environmental Engineering, Kongju National University, 1223-254 Cheonan-daero, Seobuk-gu, Cheonan-si, Chungcheongnam-do, 330-717, Republic of Korea E-mail:
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Park HJ, Lee SY, Kim MS, Choi SH, Chung EC, Kook SH, Kim E. Evaluation of shoulder pathology: three-dimensional enhanced T1 high-resolution isotropic volume excitation MR vs two-dimensional fast spin echo T2 fat saturation MR. Br J Radiol 2014; 88:20140147. [PMID: 25536442 DOI: 10.1259/bjr.20140147] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE To evaluate the diagnostic accuracy of three-dimensional (3D) enhanced T1 high-resolution isotropic volume excitation (eTHRIVE) shoulder MR for the detection of rotator cuff tears, labral lesions and calcific tendonitis of the rotator cuff in comparison with two-dimensional (2D) fast spin echo T2 fat saturation (FS) MR. METHODS This retrospective study included 73 patients who underwent shoulder MRI using the eTHRIVE technique. Shoulder MR images were interpreted separately by two radiologists. They evaluated anatomic identification and image quality of the shoulder joint on routine MRI sequences (axial and oblique coronal T2 FS images) and compared them with the reformatted eTHRIVE images. The images were scored on a four-point scale (0, poor; 1, questionable; 2, adequate; 3, excellent) according to the degree of homogeneous and sufficient fat saturation to penetrate bone and soft tissue, visualization of the glenoid labrum and distinction of the supraspinatus tendon (SST). The diagnostic accuracy of eTHRIVE images compared with routine MRI sequences was evaluated in the setting of rotator cuff tears, glenoid labral injuries and calcific tendonitis of the SST. RESULTS Fat saturation scores for eTHRIVE were significantly higher than those of the T2 FS for both radiologists. The sensitivity and accuracy of the T2 FS in diagnosing rotor cuff tears were >90%, whereas sensitivity and accuracy of the eTHRIVE method were significantly lower. The sensitivity, specificity and accuracy of both images in diagnosing labral injuries and calcific tendonitis were similar and showed no significant differences. The specificity of both images for the diagnosis of labral injuries and calcific tendonitis was higher than the sensitivities. CONCLUSION The accuracy of 3D eTHRIVE imaging was comparable to that of 2D FSE T2 FS for the diagnosis of glenoid labral injury and calcific tendonitis of SST. The 3D eTHRIVE technique was superior to 2D FSE T2 FS in terms of fat saturation. Overall, 3D eTHRIVE was inferior to T2 FS in the evaluation of rotator cuff tears because of poor contrast between joint fluid and tendons. ADVANCES IN KNOWLEDGE The accuracy of 3D eTHRIVE imaging is comparable to that of 2D FSE T2 FS for the diagnosis of glenoid labral injury and calcific tendonitis of SST.
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Affiliation(s)
- H J Park
- 1 Department of Radiology, Sungkyunkwan University School of Medicine, Kangbuk Samsung Hospital, Seoul, Republic of Korea
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Schooling CM, Chan WM, Leung SL, Lam TH, Lee SY, Shen C, Leung JY, Leung GM. Cohort Profile: Hong Kong Department of Health Elderly Health Service Cohort. Int J Epidemiol 2014; 45:64-72. [PMID: 25480143 DOI: 10.1093/ije/dyu227] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/10/2014] [Indexed: 01/26/2023] Open
Abstract
The Department of Health Elderly Health Service Cohort in Hong Kong was set up to promote understanding of ageing in a global context, to exploit the role of Hong Kong as a sentinel for populations currently experiencing very rapid economic development, to provide a developed non-Western 'social laboratory' where empirically derived hypotheses can be tested and to leverage the different patterns of common chronic diseases between East and West to generate novel hypotheses about their determinants. The initial cohort enrolled from July 1998 to the end of December 2001 includes 66 820 people aged 65 years or older, forming about 9% of the population of this age. A comprehensive health assessment was made at enrollment and then repeated regularly on an ongoing basis. The health assessment included a comprehensive assessment of lifestyle, social circumstances, physical health and mental health, including an assessment of cognition and depressive symptoms. Health services use and deaths have been obtained by record linkage and confirmed, where necessary, by telephone interview. Currently, the data are not publicly available; we would welcome collaborations and research proposals.
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Affiliation(s)
- C M Schooling
- School of Public Health, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong SAR, China and
| | - W M Chan
- Department of Health, Government of Hong Kong SAR, China
| | - S L Leung
- Department of Health, Government of Hong Kong SAR, China
| | - T H Lam
- School of Public Health, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong SAR, China and
| | - S Y Lee
- Department of Health, Government of Hong Kong SAR, China
| | - C Shen
- School of Public Health, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong SAR, China and
| | - J Y Leung
- School of Public Health, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong SAR, China and
| | - G M Leung
- School of Public Health, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong SAR, China and
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Kang SK, Park YD, Kang SI, Kim DK, Kang KL, Lee SY, Lee HJ, Kim EC. Role of resistin in the inflammatory response induced by nicotine plus lipopolysaccharide in human periodontal ligament cells in vitro. J Periodontal Res 2014; 50:602-13. [PMID: 25393899 DOI: 10.1111/jre.12240] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/12/2014] [Indexed: 01/31/2023]
Abstract
BACKGROUND AND OBJECTIVE Resistin was recently reported to play a role in inflammation-related diseases such as arthritis. However, the precise role of resistin in chronic inflammatory diseases, such as periodontal disease, remains unclear. The aim of this study was to investigate the combined effects of nicotine and lipopolysaccharide (LPS) on the expression of resistin and to assess whether resistin expression influences the levels of inflammatory cytokines, extracellular matrix (ECM) molecules and MMPs in human periodontal ligament cells (PDLCs) stimulated with both nicotine and LPS. MATERIAL AND METHODS PDLCs were pretreated with isoproterenol or resistin-specific small interfering RNA (siRNA), stimulated with LPS plus nicotine for 24 h, and then monitored for the production of inflammatory mediators. The concentrations of prostaglandin E2 (PGE2) and nitric oxide (NO) were measured by radioimmunoassay and the Griess method, respectively. RT-PCR and western blot analysis were used to measure the levels of mRNA and protein, respectively. Western blot analysis was also used to assess the activation of various signal-transduction pathways. RESULTS Treatment with nicotine plus LPS up-regulated the expression of resistin mRNA and the production of resistin protein in PDLCs in a time- and concentration-dependent manner. Isoproterenol-mediated interference with the function of resistin, or siRNA-mediated knockdown of resistin expression, markedly attenuated the LPS plus nicotine-mediated stimulation of PGE2 and NO production, the production of cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase proteins and the expression of proinflammatory cytokines [tumor necrosis factor-α, interleukin (IL)-1β, IL-6 and IL-12] and MMPs (MMP-1, MMP-2 and MMP-9); however, these treatments restored the expression of ECM molecules. Furthermore, pretreatment with isoproterenol or resistin-specific siRNA blocked nicotine plus LPS-induced activation of phosphoinositide-3-kinase, glycogen synthase kinase-3 beta, β-catenin, p38, ERK, JNK and nuclear factor-κB. CONCLUSION This is the first study to show that the inhibition of resistin, by either a pharmacological or a genetic silencing approach, has anti-inflammatory effects. These effects include decreased levels of inflammatory cytokines and the prevention of ECM breakdown in a nicotine plus LPS-stimulated PDLC model.
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Affiliation(s)
- S K Kang
- Department of Oral Medicine, School of Dentistry, Kyung Hee University, Seoul, Korea
| | - Y D Park
- Department of Preventive and Society Dentistry, School of Dentistry, Kyung Hee University, Seoul, Korea
| | - S I Kang
- Department of Oral and Maxillofacial Pathology, Research Center for Tooth and Periodontal Regeneration (MRC), School of Dentistry, Kyung Hee University, Seoul, Korea
| | - D K Kim
- Department of Oral Medicine, School of Dentistry, Kyung Hee University, Seoul, Korea
| | - K L Kang
- Department of Periodontology, School of Dentistry, Kyung Hee University, Seoul, Korea
| | - S Y Lee
- Department of Oral and Maxillofacial Pathology, Research Center for Tooth and Periodontal Regeneration (MRC), School of Dentistry, Kyung Hee University, Seoul, Korea
| | - H J Lee
- Department of Oral and Maxillofacial Pathology, Research Center for Tooth and Periodontal Regeneration (MRC), School of Dentistry, Kyung Hee University, Seoul, Korea
| | - E C Kim
- Department of Oral and Maxillofacial Pathology, Research Center for Tooth and Periodontal Regeneration (MRC), School of Dentistry, Kyung Hee University, Seoul, Korea
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Lee J, Lee SY, Lim JK, Yoo SS, Lee SY, Cha SI, Park JY, Kim CH. Radiologic and laboratory differences in patients with tuberculous and parapneumonic pleural effusions showing non-lymphocytic predominance and high adenosine deaminase levels. Infection 2014; 43:65-71. [PMID: 25385057 DOI: 10.1007/s15010-014-0697-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Accepted: 10/23/2014] [Indexed: 10/24/2022]
Abstract
PURPOSE Tuberculous pleural effusion (TPE) is characterized by lymphocytic predominance and high adenosine deaminase (ADA) levels. However, TPEs sometimes present non-lymphocytic predominance, and parapneumonic effusion (PPE) often exceeds the cutoff value of ADA for TPE. Thus, the differential diagnosis of cases with pleural fluid (PF) showing non-lymphocytic predominance and high ADA levels is challenging. However, limited data concerning the clinical differences in these patients are available. METHODS A retrospective study was conducted on TPE and PPE patients with PF showing non-lymphocytic predominance and ADA levels ≥40 U/L in 2009-2013 in a South Korean tertiary referral hospital. The clinical, laboratory, and computed tomography (CT) findings between the groups were analyzed using multivariate logistic regression to develop a prediction model with independent factors for TPE. RESULTS Among 353 patients with TPE, 24 (6.8 %) showed PF with non-lymphocytic predominance and ADA levels of ≥40 U/L. Twenty-eight PPE patients who presented PF findings comparable with those of TPE patients were included in the control group. In the final analysis, PF ADA levels >58 U/L and nodular lung lesions on CT were independent positive predictors, while loculated effusion was an independent negative predictor for TPE. Using the prediction model, a score ≥ +3 provided a sensitivity of 88 %, specificity of 93 %, positive predictive value of 91 %, and negative predictive value of 90 % for TPE. CONCLUSION PF ADA levels, nodular lung lesions, and loculated pleural effusion may help differentiate TPE from PPE in patients with PF showing non-lymphocytic predominance and ADA levels ≥40 U/L.
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Affiliation(s)
- J Lee
- Department of Internal Medicine, School of Medicine, Kyungpook National University, 680 Gukchaebosang-ro, Jung-Gu, Daegu, 700-842, Republic of Korea
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Diniz B, Rodger DC, Chavali VR, MacKay T, Lee SY, Stambolian D, Sadda SVR. Drusen and RPE atrophy automated quantification by optical coherence tomography in an elderly population. Eye (Lond) 2014; 29:272-9. [PMID: 25376121 DOI: 10.1038/eye.2014.260] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Accepted: 09/23/2014] [Indexed: 11/09/2022] Open
Abstract
PURPOSE Correlate OCT-derived measures of drusen and retinal pigment epithelium (RPE) atrophy areas (RAs) with demographic features in an elderly population. PATIENTS AND METHODS Subjects aged 50 years and older underwent Cirrus OCT scanning. Drusen area and volume were obtained from the macula within a central circle (CC) of 3 mm and a surrounding perifoveal ring (PR) of 3-5 mm, using the RPE analysis software (6.0). RA measurements were generated for the 6 × 6 mm(2) retinal area. Gender, age, smoking status, and systolic blood pressure (SBP) were considered. RESULTS A total of 434 eyes were included. RA was larger in women (0.63±0.16 vs 0.26±0.08 mm(2), P=0.05) and with increasing age. The PR drusen area increased with increasing age (P<0.001), whereas the CC drusen area remained stable after the age of 70 years (0.25±0.06 mm(2) for ages 70-79 years and 0.25±0.07 mm(2) for ages >80 years). Drusen volume in the CC was smaller after the age of 80 years (0.009±0.003 mm(3)) compared with the 70- to 79-year-old group (0.02±0.008 mm(3)). Drusen measurements were similar between smokers and nonsmokers, but the PR drusen area (0.29 mm(2), P=0.05) and volume (0.40 mm(3), P=0.005) were correlated with years smoked. RA (0.24 mm(2), P=0.10), PR drusen area (0.29 mm(2), P=0.05), and volume (0.40 mm(3), P=0.005) were found to be directly associated with SBP. There was a high correlation between the eyes of the same subject. CONCLUSION OCT-based automated algorithms can be used to analyze and describe drusen and geographic atrophy burden in such population-based studies of elderly patients.
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Affiliation(s)
- B Diniz
- 1] Doheny Eye Institute, Los Angeles, CA, USA [2] Department of Ophthalmology, Universidade Federal de São Paulo, São Paulo, Brazil
| | - D C Rodger
- 1] Doheny Eye Institute, Los Angeles, CA, USA [2] Department of Ophthalmology, Keck School of Medicine of the University of Southern California, Los Angeles, CA, USA
| | - V R Chavali
- Department of Ophthalmology, University of Pennsylvania, Philadelphia, PA, USA
| | - T MacKay
- Department of Ophthalmology, University of Pennsylvania, Philadelphia, PA, USA
| | - S Y Lee
- 1] Doheny Eye Institute, Los Angeles, CA, USA [2] Department of Ophthalmology, Keck School of Medicine of the University of Southern California, Los Angeles, CA, USA
| | - D Stambolian
- Department of Ophthalmology, University of Pennsylvania, Philadelphia, PA, USA
| | - S V R Sadda
- 1] Doheny Eye Institute, Los Angeles, CA, USA [2] Department of Ophthalmology, Keck School of Medicine of the University of Southern California, Los Angeles, CA, USA
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Shin MR, Kang SK, Kim YS, Lee SY, Hong SC, Kim EC. TNF-α and LPS activate angiogenesis via VEGF and SIRT1 signalling in human dental pulp cells. Int Endod J 2014; 48:705-16. [PMID: 25311745 DOI: 10.1111/iej.12396] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Accepted: 10/08/2014] [Indexed: 01/05/2023]
Abstract
AIM To assess whether SIRT1 and VEGF are responsible for tumour necrosis factor-α (TNF-α) and lipopolysaccharide (LPS)-induced angiogenesis and to examine the molecular mechanism(s) of action in human dental pulp cells (HDPCs). METHODOLOGY Immortalized HDPCs obtained from Prof. Takashi Takata (Hiroshima University, Japan) were treated with LPS (1 μg mL(-1) ) and TNF-α (10 ng mL(-1) ) for 24 h. mRNA and protein levels were examined by RT-PCR and Western blotting, respectively. Migration and tube formation were examined in human umbilical vein endothelial cells (HUVECs). The data were analysed by one-way anova. Statistical analysis was performed at α = 0.05. RESULTS LPS and TNF-α upregulated VEGF and SIRT1 mRNA and protein levels. Inhibition of SIRT1 activity by sirtinol and SIRT1 siRNA or inhibition of the VEGF receptor by CBO-P11 significantly attenuated LPS + TNF-α-stimulated MMPs production in HDPCs, as well as migration and tube formation in HUVECs (P < 0.05). Furthermore, sirtinol, SIRT1 siRNA and CBO-P11 attenuated phosphorylation of Akt, extracellular signal-regulated kinase (ERK), p38 and c-Jun N-terminal kinase (JNK) and the nuclear translocation of NF-κB p65. Pre-treatment with inhibitors of p38, ERK, JNK, PI3K and NF-κB decreased LPS + TNF-α-induced VEGF and SIRT1 expression, MMPs activity in HDPCs and angiogenesis (P < 0.05) in HUVECs. CONCLUSIONS TNF-α and LPS led to upregulation of VEGF and SIRT1, and subsequent upregulation of MMP-2 and MMP-9 production, and promote angiogenesis via pathways involving PI3K, p38, ERK, JNK and NF-κB. The results suggest that inhibition of SIRT1 and VEGF might attenuate pro-inflammatory mediator-induced pulpal disease.
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Affiliation(s)
- M R Shin
- Department of Prosthodontics, Dongatn Sacred Heart Hospital, Hallym University, Dongtan, Korea
| | - S K Kang
- Department of Oral Medicine, School of Dentistry, Kyung Hee University, Seoul, Korea
| | - Y S Kim
- Department of Oral and Maxillofacial Pathology, Research Center for Tooth and Periodontal Regeneration (MRC), School of Dentistry, Kyung Hee University, Seoul, Korea
| | - S Y Lee
- Department of Oral and Maxillofacial Pathology, Research Center for Tooth and Periodontal Regeneration (MRC), School of Dentistry, Kyung Hee University, Seoul, Korea
| | - S C Hong
- Department of Conservative Dentistry, School of Dentistry, Kyung Hee University, Seoul, Korea
| | - E-C Kim
- Department of Oral and Maxillofacial Pathology, Research Center for Tooth and Periodontal Regeneration (MRC), School of Dentistry, Kyung Hee University, Seoul, Korea
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Choi M, Hyun MK, Choi S, Tchoe HJ, Lee SY, Son KM, Jung YO, Kim HA. Comparative Effectiveness of Biological Agents With Diseases Modifying Anti-Rheumatic Drugs For Methotrexate Failure Rheumatoid Arthritis Patients: A Baysian Mixed Treatment Comparison. Value Health 2014; 17:A373-A374. [PMID: 27200806 DOI: 10.1016/j.jval.2014.08.2577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
- M Choi
- National Evidence-based Healthcare Collaborating Agency, Seoul, South Korea
| | - M K Hyun
- National Evidence-based Healthcare Collaborating Agency, Seoul, South Korea
| | - S Choi
- National Evidence-based Healthcare Collaborating Agency, Seoul, South Korea
| | - H J Tchoe
- National Evidence-based Healthcare Collaborating Agency, Seoul, South Korea
| | - S Y Lee
- Hallym University, Chuncheon, South Korea
| | - K M Son
- Hallym University, Chuncheon, South Korea
| | - Y O Jung
- Hallym University, Chuncheon, South Korea
| | - H A Kim
- Hallym University, Chuncheon, South Korea
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Lee SY, Bae JH, Kim JG, Jang KM, Shon WY, Kim KW, Lim HC. The influence of surgical factors on dislocation of the meniscal bearing after Oxford medial unicompartmental knee replacement: a case-control study. Bone Joint J 2014; 96-B:914-22. [PMID: 24986945 DOI: 10.1302/0301-620x.96b7.33352] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [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: 11/05/2022]
Abstract
The aim of this study was to evaluate the risk factors for dislocation of the bearing after a mobile-bearing Oxford medial unicompartmental knee replacement (UKR) and to test the hypothesis that surgical factors, as measured from post-operative radiographs, are associated with its dislocation From a total of 480 UKRs performed between 2001 and 2012, in 391 patients with a mean age of 66.5 years (45 to 82) (316 female, 75 male), we identified 17 UKRs where bearing dislocation occurred. The post-operative radiological measurements of the 17 UKRs and 51 matched controls were analysed using conditional logistic regression analysis. The post-operative radiological measurements included post-operative change in limb alignment, the position of the femoral and tibial components, the resection depth of the proximal tibia, and the femoral component-posterior condyle classification. We concluded that a post-operative decrease in the posterior tibial slope relative to the pre-operative value was the only significant determinant of dislocation of the bearing after medial Oxford UKR (odds ratio 1.881; 95% confidence interval 1.272 to 2.779). A post-operative posterior tibial slope < 8.45° and a difference between the pre-operative and post-operative posterior tibial slope of > 2.19° may increase the risk of dislocation.
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Affiliation(s)
- S Y Lee
- Korea University College of Medicine, Department of Orthopaedic Surgery, 80, Guro-Dong, Guro-Gu, Seoul, 152-703, South Korea
| | - J H Bae
- Korea University College of Medicine, Department of Orthopaedic Surgery, 516, Gojan 1-Dong, Danwon-Gu, Ansan, 425-707, South Korea
| | - J G Kim
- Korea University College of Medicine, Department of Orthopaedic Surgery, 516, Gojan 1-Dong, Danwon-Gu, Ansan, 425-707, South Korea
| | - K M Jang
- Korea University College of Medicine, Department of Orthopaedic Surgery, 80, Guro-Dong, Guro-Gu, Seoul, 152-703, South Korea
| | - W Y Shon
- Korea University College of Medicine, Department of Orthopaedic Surgery, 80, Guro-Dong, Guro-Gu, Seoul, 152-703, South Korea
| | - K W Kim
- Korea University College of Medicine, Department of Orthopaedic Surgery, 516, Gojan 1-Dong, Danwon-Gu, Ansan, 425-707, South Korea
| | - H C Lim
- Korea University College of Medicine, Department of Orthopaedic Surgery, 80, Guro-Dong, Guro-Gu, Seoul, 152-703, South Korea
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Lee SY, Lai TH, Hui YY, Chan KS. Hydroxide-promoted selective C(α)–C(β) bond activation of aliphatic ethers by rhodium(III) porphyrins. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2014.04.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Shen C, Schooling CM, Chan WM, Lee SY, Leung GM, Lam TH. Self-reported diabetes and mortality in a prospective Chinese elderly cohort study in Hong Kong. Prev Med 2014; 64:20-6. [PMID: 24704132 DOI: 10.1016/j.ypmed.2014.03.021] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 03/23/2014] [Accepted: 03/24/2014] [Indexed: 01/19/2023]
Abstract
OBJECTIVE In Western countries, diabetes mellitus is positively associated with death from all- and specific-causes including cancer, cardiovascular and respiratory diseases. In a Chinese setting with a different disease pattern: high diabetes rates in a relatively non-obese population with low ischemic heart disease (IHD) rates where diabetes is positively associated with IHD, we examined the association of self-reported diabetes with death among older people. METHODS Multivariable Cox regression analysis was used in a population-based prospective cohort of 66,820 Chinese (65+ years) enrolled from July 1998 to December 2001 at Elderly Health Centers of the Hong Kong Government Department of Health, followed until May 31, 2012. RESULTS During 10.9 years of follow-up, 19,845 deaths occurred. Self-reported diabetes was associated with death from all-causes (hazard ratio (HR)=1.56, 95% confidence interval (CI) 1.51, 1.62), cardiovascular disease (HR=1.84, 95% CI 1.72, 1.96), cancer (HR=1.11, 95% CI 1.03 to 1.20), liver cancer (HR=1.38, 95% CI 1.13 to 1.69) and stomach cancer (HR=1.38, 95% CI 1.03 to 1.85), adjusted for age, sex, socio-economic position, alcohol use, smoking, exercise and body mass index. CONCLUSION Such a pattern of associations suggests that further investigation into the drivers of diabetes is required in this and similar populations.
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Affiliation(s)
- Chen Shen
- School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - C Mary Schooling
- School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China; City University of New York , School of Public Health and Hunter College, NY, USA.
| | - Wai Man Chan
- Department of Health, Government of Hong Kong SAR, Hong Kong, China
| | - Siu Yin Lee
- Department of Health, Government of Hong Kong SAR, Hong Kong, China
| | - Gabriel M Leung
- School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Tai Hing Lam
- School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
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Lee SY, Niikura T, Iwakura T, Sakai Y, Kuroda R, Kurosaka M. Complete traumatic backout of the blade of proximal femoral nail antirotation: a case report. Orthop Traumatol Surg Res 2014; 100:441-3. [PMID: 24810495 DOI: 10.1016/j.otsr.2013.12.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [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: 11/21/2013] [Revised: 12/13/2013] [Accepted: 12/24/2013] [Indexed: 02/02/2023]
Abstract
This article presents a rare case of traumatic complete expulsion of the helical blade after successful treatment of an intertrochanteric fracture with proximal femoral nail antirotation (PFNA). A 94-year-old woman sustained an intertrochanteric fracture of the left femur. Fracture fixation was performed by using PFNA-II. At six months FU, the patient presented with pain at the proximal lateral left thigh after she had fallen. A protrusion was noted. Radiographs showed a complete expulsion of the helical blade with a healed intertrochanteric fracture. The PFNA-II was removed and a cemented bipolar hemiarthroplasty was performed. At 5 months after surgery, the patient was able to walk with a walker without pain. Traumatic complete expulsion of the blade should be considered as a possible complication of PFNA/PFNA-II.
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Affiliation(s)
- S Y Lee
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1, Kusunoki-cho, Chuo-ku, 650-0017 Kobe, Japan.
| | - T Niikura
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1, Kusunoki-cho, Chuo-ku, 650-0017 Kobe, Japan
| | - T Iwakura
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1, Kusunoki-cho, Chuo-ku, 650-0017 Kobe, Japan
| | - Y Sakai
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1, Kusunoki-cho, Chuo-ku, 650-0017 Kobe, Japan
| | - R Kuroda
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1, Kusunoki-cho, Chuo-ku, 650-0017 Kobe, Japan
| | - M Kurosaka
- Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1, Kusunoki-cho, Chuo-ku, 650-0017 Kobe, Japan
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Kim CH, Im KH, Yoo SS, Lee SY, Cha SI, Jung HY, Park JY, Yu W, Lee J. Comparison of the incidence between tuberculosis and nontuberculous mycobacterial disease after gastrectomy. Infection 2014; 42:697-704. [PMID: 24817438 DOI: 10.1007/s15010-014-0627-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Accepted: 04/25/2014] [Indexed: 11/25/2022]
Abstract
PURPOSE Gastrectomy is a well-known risk factor for tuberculosis (TB). However, little data are available regarding the relationship between gastrectomy and the risk of nontuberculous mycobacterial (NTM) disease. Here, we investigated the incidence of TB and NTM lung disease in gastrectomized patients. METHOD New cases of TB and NTM lung infection or disease were examined among patients who had undergone gastrectomy due to gastric cancer from 2003 to 2009 at a tertiary referral hospital in South Korea. Annualized incidence rates for cases were compared with those of the general population. RESULTS This study included a total of 2,684 patients. New mycobacterial cases were found in 41 patients. Cases of TB and NTM lung infection were 35 (85 %) and 6 (15 %) including 2 NTM lung disease cases, respectively. Annualized crude incidence rates for TB, NTM lung infection, and NTM lung disease were 327/100,000, 56/100,000, and 19/100,000, respectively. The age-standardized incidence rate of TB was significantly higher in gastrectomized patients than in the general population. However, the standardized incidences of NTM lung infection and disease were not significantly different from those of non-gastrectomized patients. Patients with NTM lung infection frequently exhibited comorbid chronic lung disease, while those with TB were more frequently found to have fibronodular lesions on preoperative chest radiography. CONCLUSIONS Gastrectomy does not appear to increase the risk of NTM lung disease. However, NTM lung infection or disease should be considered as a differential diagnosis of pulmonary TB in gastrectomized patients accompanying chronic lung disease.
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Affiliation(s)
- C H Kim
- Department of Internal Medicine, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
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Jang JY, Park T, Lee S, Kang MJ, Lee SY, Lee KB, Chang YR, Kim SW. Validation of international consensus guidelines for the resection of branch duct-type intraductal papillary mucinous neoplasms. Br J Surg 2014; 101:686-92. [DOI: 10.1002/bjs.9491] [Citation(s) in RCA: 109] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/10/2014] [Indexed: 12/12/2022]
Abstract
Abstract
Background
Classifications of intraductal papillary mucinous neoplasm (IPMN) remain ambiguous, especially for the mixed type. Factors predicting malignancy remain unclear. The aim of this study was to evaluate the usefulness of factors predicting malignancy in the new international consensus guidelines for resection of branch duct-type (BD)-IPMN and to compare them with those in the previous version.
Methods
A prospectively collected database of patients with biopsy-proven BD-IPMN was analysed to compare factors between the first and second consensus guidelines, particularly as predictors of malignancy.
Results
Of 350 patients with BD-IPMN, sensitivity (0·724) and balanced accuracy (0·751) of the second guidelines were superior to those (0·639 and 0·730) in the first version at the expense of slightly reduced specificity (0·779 versus 0·822 for the first version) by random forest models. Multiple logistic regression analysis showed that main pancreatic duct dilatation greater than 5 mm (hazard ratio (HR) 4·54, 95 per cent confidence interval 2·45 to 8·41; P < 0·001), mural nodules (HR 6·27, 3·27 to 12·01; P < 0·001) and carbohydrate antigen 19–9 level above 37 units/ml (HR 4·03, 1·83 to 8·90; P = 0·001) were independent predictors of BD-IPMN malignancy.
Conclusion
The new consensus guidelines provide better sensitivity, performance of factors predicting malignancy, and balanced accuracy in the diagnosis of BD-IPMN malignancy. Size alone was limited in predicting malignancy. Variability in clinical significance of the individual factors associated with a risk of malignancy indicates the need for a tailored approach in the management of patients with BD-IPMN.
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Affiliation(s)
- J-Y Jang
- Department of Surgery and Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - T Park
- Department of Statistics, Seoul National University College of Natural Sciences, Seoul, Korea
| | - S Lee
- Department of Statistics, Seoul National University College of Natural Sciences, Seoul, Korea
| | - M J Kang
- Department of Surgery and Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - S Y Lee
- Department of Mathematics and Statistics, Sejong University College of Natural Sciences, Seoul, Korea
| | - K B Lee
- Department of Pathology, Seoul National University College of Medicine, Seoul, Korea
| | - Y R Chang
- Department of Surgery and Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
| | - S-W Kim
- Department of Surgery and Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
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Choi ML, Begeti F, Oh JH, Lee SY, O'Keeffe GC, Clelland CD, Tyers P, Cho ZH, Kim YB, Barker RA. Dopaminergic manipulations and its effects on neurogenesis and motor function in a transgenic mouse model of Huntington's disease. Neurobiol Dis 2014; 66:19-27. [PMID: 24561069 DOI: 10.1016/j.nbd.2014.02.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Revised: 01/29/2014] [Accepted: 02/10/2014] [Indexed: 11/28/2022] Open
Abstract
Huntington's disease (HD) is an inherited neurodegenerative disorder that is classically defined by a triad of movement and cognitive and psychiatric abnormalities with a well-established pathology that affects the dopaminergic systems of the brain. This has classically been described in terms of an early loss of dopamine D2 receptors (D2R), although interestingly the treatments most effectively used to treat patients with HD block these same receptors. We therefore sought to examine the dopaminergic system in HD not only in terms of striatal function but also at extrastriatal sites especially the hippocampus, given that transgenic (Tg) mice also exhibit deficits in hippocampal-dependent cognitive tests and a reduction in adult hippocampal neurogenesis. We showed that there was an early reduction of D2R in both the striatum and dentate gyrus (DG) of the hippocampus in the R6/1 transgenic HD mouse ahead of any overt motor signs and before striatal neuronal loss. Despite downregulation of D2Rs in these sites, further reduction of the dopaminergic input to these sites by either medial forebrain bundle lesions or receptor blockade using sulpiride was able to improve both deficits in motor performance and adult hippocampal neurogenesis. In contrast, a reduction in dopaminergic innervation of the neurogenic niches resulted in impaired neurogenesis in healthy WT mice. This study therefore provides evidence that D2R blockade improves hippocampal and striatal deficits in HD mice although the underlying mechanism for this is unclear, and suggests that agents working within this network may have greater effects than previously thought.
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Affiliation(s)
- M L Choi
- Department of Clinical Neurosciences, John van Geest Centre for Brain Repair, University of Cambridge, Cambridge CB2 0PY, UK
| | - F Begeti
- Department of Clinical Neurosciences, John van Geest Centre for Brain Repair, University of Cambridge, Cambridge CB2 0PY, UK; School of Clinical Medicine, University of Cambridge, Addenbrooke's Hospital, Cambridge CB2 0SP, UK
| | - J H Oh
- Neuroscience Research Institute, Gachon University, Incheon 405-760, Republic of Korea
| | - S Y Lee
- Neuroscience Research Institute, Gachon University, Incheon 405-760, Republic of Korea
| | - G C O'Keeffe
- Department of Clinical Neurosciences, John van Geest Centre for Brain Repair, University of Cambridge, Cambridge CB2 0PY, UK
| | - C D Clelland
- Department of Clinical Neurosciences, John van Geest Centre for Brain Repair, University of Cambridge, Cambridge CB2 0PY, UK
| | - P Tyers
- Department of Clinical Neurosciences, John van Geest Centre for Brain Repair, University of Cambridge, Cambridge CB2 0PY, UK
| | - Z H Cho
- Department of Clinical Neurosciences, John van Geest Centre for Brain Repair, University of Cambridge, Cambridge CB2 0PY, UK
| | - Y B Kim
- Department of Clinical Neurosciences, John van Geest Centre for Brain Repair, University of Cambridge, Cambridge CB2 0PY, UK
| | - R A Barker
- Department of Clinical Neurosciences, John van Geest Centre for Brain Repair, University of Cambridge, Cambridge CB2 0PY, UK; Department of Neurology, Addenbrooke's Hospital, Cambridge CB2 0QQ, UK.
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Lee KY, Kim KW, Baek YJ, Chung DY, Lee EH, Lee SY, Moon JK. Biosorption of uranium(VI) from aqueous solution by biomass of brown algae Laminaria japonica. Water Sci Technol 2014; 70:136-43. [PMID: 25026591 DOI: 10.2166/wst.2014.205] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The uranium(VI) adsorption efficiency of non-living biomass of brown algae was evaluated in various adsorption experimental conditions. Several different sizes of biomass were prepared using pretreatment and surface-modification steps. The kinetics of uranium uptake were mainly dependent on the particle size of the prepared Laminaria japonica biosorbent. The optimal particle size, contact time, and injection amount for the stable operation of the wastewater treatment process were determined. Spectroscopic analyses showed that uranium was adsorbed in the porous inside structure of the biosorbent. The ionic diffusivity in the biomass was the dominant rate-limiting factor; therefore, the adsorption rate was significantly increased with decrease of particle size. From the results of comparative experiments using the biosorbents and other chemical adsorbents/precipitants, such as activated carbons, zeolites, and limes, it was demonstrated that the brown algae biosorbent could replace the conventional chemicals for uranium removal. As a post-treatment for the final solid waste reduction, the ignition treatment could significantly reduce the weight of waste biosorbents. In conclusion, the brown algae biosorbent is shown to be a favorable adsorbent for uranium(VI) removal from radioactive wastewater.
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Affiliation(s)
- K Y Lee
- Korea Atomic Energy Research Institute (KAERI), 989-111 Daedeok-daero, Yuseong-gu, Daejeon, 305-353, Republic of Korea E-mail:
| | - K W Kim
- Korea Atomic Energy Research Institute (KAERI), 989-111 Daedeok-daero, Yuseong-gu, Daejeon, 305-353, Republic of Korea E-mail:
| | - Y J Baek
- Korea Atomic Energy Research Institute (KAERI), 989-111 Daedeok-daero, Yuseong-gu, Daejeon, 305-353, Republic of Korea E-mail:
| | - D Y Chung
- Korea Atomic Energy Research Institute (KAERI), 989-111 Daedeok-daero, Yuseong-gu, Daejeon, 305-353, Republic of Korea E-mail:
| | - E H Lee
- Korea Atomic Energy Research Institute (KAERI), 989-111 Daedeok-daero, Yuseong-gu, Daejeon, 305-353, Republic of Korea E-mail:
| | - S Y Lee
- Department of Mechanical Engineering, Sogang University, 1 Shinsu-dong, Mapo-gu, Seoul, 121-742, Republic of Korea
| | - J K Moon
- Korea Atomic Energy Research Institute (KAERI), 989-111 Daedeok-daero, Yuseong-gu, Daejeon, 305-353, Republic of Korea E-mail:
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Song HR, Park HS, Yun KE, Cho SH, Choi EY, Lee SY, Kim JH, Sung HN, Kim JH, Choi SI, Yoon YS, Lee ES, Han JH, Shin CI, Chang HM, Bae SC. Gender and age differences in the impact of overweight on obesity-related quality of life among Korean adults. Obes Res Clin Pract 2013; 4:e1-e82. [PMID: 24345622 DOI: 10.1016/j.orcp.2009.07.003] [Citation(s) in RCA: 17] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2008] [Revised: 07/17/2009] [Accepted: 07/21/2009] [Indexed: 10/20/2022]
Abstract
SUMMARY OBJECTIVE To investigate gender and age difference in impact of overweight on health-related quality of life (HRQOL) among Korean adults. METHODS Cross-sectional obesity-related quality of life (QOL) scores were measured by a Korean obesity-related QOL scale (KOQOL) from 448 Korean adults aged 20-80 years. A body mass index (BMI) was categorized with normal-weight as BMI < 23 kg/m(2), overweight as BMI ≥ 23 kg/m(2) based on the alternative cutoff points for Asians. Each gender was respectively stratified by median age, 45 years for men and 50 years for women, to examine the obesity-related QOL by age groups. RESULTS Women had a poorer obesity-related QOL compared to men (p < 0.001). In the younger age group, overweight women had a poorer obesity-related QOL compared with normal-weight women (p < 0.001), however normal-weight and overweight men showed no difference in obesity-related QOL. In the older age group, overweight men showed better QOL on the domains of work-related and psychosocial health than those for normal-weight men, but overweight women still suffered from work-related and routine life QOL. CONCLUSIONS This study showed the impact of overweight on obesity-related QOL was different for gender and age group. We should consider the results to manage weight in overweight persons.
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Affiliation(s)
- H R Song
- Department of Internal Medicine, Hanyang University College of Medicine, South Korea
| | - H S Park
- Department of Internal Medicine, Hanyang University College of Medicine, South Korea.
| | - K E Yun
- Department of Internal Medicine, Hanyang University College of Medicine, South Korea
| | - S H Cho
- Department of Internal Medicine, Hanyang University College of Medicine, South Korea
| | - E Y Choi
- Department of Internal Medicine, Hanyang University College of Medicine, South Korea
| | - S Y Lee
- Department of Internal Medicine, Hanyang University College of Medicine, South Korea
| | - J H Kim
- Department of Internal Medicine, Hanyang University College of Medicine, South Korea
| | - H N Sung
- Department of Internal Medicine, Hanyang University College of Medicine, South Korea
| | - J H Kim
- Department of Internal Medicine, Hanyang University College of Medicine, South Korea
| | - S I Choi
- Department of Internal Medicine, Hanyang University College of Medicine, South Korea
| | - Y S Yoon
- Department of Internal Medicine, Hanyang University College of Medicine, South Korea
| | - E S Lee
- Department of Internal Medicine, Hanyang University College of Medicine, South Korea
| | - J H Han
- Department of Internal Medicine, Hanyang University College of Medicine, South Korea
| | - C I Shin
- Department of Internal Medicine, Hanyang University College of Medicine, South Korea
| | - H M Chang
- Department of Internal Medicine, Hanyang University College of Medicine, South Korea
| | - S C Bae
- Department of Internal Medicine, Hanyang University College of Medicine, South Korea
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You JY, Song EJ, Lee MH, Jung SY, Lee SY, Kang HS, Lee ES. Abstract P1-01-19: Role of axillary clearance with tumor positive sentinel node in mastectomy group: Is the results of ACOSOG Z0011 trial adaptable to mastectomy patient? Cancer Res 2013. [DOI: 10.1158/0008-5472.sabcs13-p1-01-19] [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: Recent data from ACOSOG Z0011 trial or AMAROS trial suggest that axillary lymph node dissection(ALND) may be unnecessary for patients with positive sentinel lymph node biopsy(SLNB) receiving breast conserving surgery(BCS) with irradiation. However, consensus statements and guidelines until recently recommended that patients with mastectomy and tumor positive sentinel node undergo completion ALND. In this preliminary study, we compared these patients who did not undergo ALND with the patients who received BCS with SLNB only and irradiation and we analyzed the locoregional recurrence rate to show no differences of outcomes between two groups.
Method: We identified 6,163 women with invasive breast cancer who underwent surgical resection at the National Cancer Center (Goyang,Gyeonggi-do,Korea) between January 2000 to December 2011. Clinico-pathological data obtained from prospective collecting medical database of our institution were analyzed retrospectively. The mastectomy with positive SLNB group was 47 patients and BCS with positive SLNB and irradiation group was 172 patients. The primary end point was loco-regional recurrence rate.
Result : Clinical and tumor characteristics were similar between two groups except T stage and receptor status. The mean tumor size was 5.5cm with mastectomy group and 3.5cm with BCS group. The median number of nodes removed was three. There was not a single case of locoregional recurrence in both groups. At a median follow-up of 53.5 months (last follow-up, May 2013), 5-year overall survival was 85.7% with mastectomy and 97.3% with BCS group.
Conclusion : In our study, there was no case of locoregional recurrence as above. This results lend weight to the argument that SLNB without ALND may be reasonable management for selected patients with appropriate surgery and adjuvant systemic therapy. This study can be regarded as a preliminary study with a sufficient value despite of the prognosis showed some statistical differences between two groups. It resides in the difference of initial stage of patients of two groups. We will present additional data compared with the mastectomy with axillary clearance group at the meeting.
Acknowledgement This work was supported by grant from the National Cancer Center Korea (1210331-2).
Citation Information: Cancer Res 2013;73(24 Suppl): Abstract nr P1-01-19.
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Affiliation(s)
- JY You
- Center for Breast Cancer, National Cancer Center, Goyang, Gyeonggi-do, Korea
| | - EJ Song
- Center for Breast Cancer, National Cancer Center, Goyang, Gyeonggi-do, Korea
| | - MH Lee
- Center for Breast Cancer, National Cancer Center, Goyang, Gyeonggi-do, Korea
| | - SY Jung
- Center for Breast Cancer, National Cancer Center, Goyang, Gyeonggi-do, Korea
| | - SY Lee
- Center for Breast Cancer, National Cancer Center, Goyang, Gyeonggi-do, Korea
| | - HS Kang
- Center for Breast Cancer, National Cancer Center, Goyang, Gyeonggi-do, Korea
| | - ES Lee
- Center for Breast Cancer, National Cancer Center, Goyang, Gyeonggi-do, Korea
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Kim BJ, Lee YS, Lee SY, Park SY, Dieplinger H, Yea K, Lee SH, Koh JM, Kim GS. Afamin stimulates osteoclastogenesis and bone resorption via Gi-coupled receptor and Ca2+/calmodulin-dependent protein kinase (CaMK) pathways. J Endocrinol Invest 2013; 36:876-82. [PMID: 23698732 DOI: 10.3275/8975] [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] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND Afamin was recently identified as a novel osteoclast-derived coupling factor that can stimulate the in vitro and in vivo migration of preosteoblasts. AIM In order to understand in more detail the biological roles of afamin in bone metabolism, we investigated its effects on osteoclastic differentiation and bone resorption. METHODS Osteoclasts were differentiated from mouse bone marrow cells. Tartrate-resistant acid phosphatase (TRAP)-positive multinucleated cells were considered as osteoclasts, and the resorption area was determined by incubating the cells on dentine discs. The intracellular cAMP level was determined using a direct enzyme immunoassay. Signaling pathways were investigated using western blot and RT-PCR. Recombinant afamin was administered exogenously to bone cell cultures. RESULTS Afamin stimulated both osteoclastogenesis and in vitro bone resorption. Consistently, the expressions of osteoclast differentiation markers were significantly increased by afamin. Although afamin mainly affected the late-differentiation stages of osteoclastogenesis, the expression levels of receptor activator of nuclear factor-κB ligand (RANKL)-dependent signals were not changed. Afamin markedly decreased the levels of intracellular cAMP with reversal by pretreatment with pertussis toxin (PTX), a specific inhibitor of Gi-coupled receptor signaling. In addition, PTX almost completely blocked afamin-stimulated osteoclastogenesis. Furthermore, pretreatment with KN93 and STO609 - Ca2+/cal - mo dulin-dependent protein kinase (CaMK) and CaMK kinase inhibitors, respectively - significantly prevented decreases in the intracellular cAMP level by afamin while attenuating afamin-stimulated osteoclastogenesis. CONCLUSION Afamin enhances osteoclastogenesis by decreasing intracellular cAMP levels via Gi-coupled receptor and CaMK pathways.
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Affiliation(s)
- B J Kim
- Division of Endocrinology and Metabolism, Asan Medical Center, University of Ulsan College of Medicine, 388-1 Poongnap2- Dong, Songpa-Gu, Seoul 138-736, Korea
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Lee KM, Chung CY, Kwon SS, Won SH, Lee SY, Chung MK, Park MS. Ankle fractures have features of an osteoporotic fracture. Osteoporos Int 2013; 24:2819-25. [PMID: 23681087 DOI: 10.1007/s00198-013-2394-6] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Accepted: 03/13/2013] [Indexed: 01/22/2023]
Abstract
UNLABELLED We report the bone attenuation of ankle joint measured on computed tomography (CT) and the cause of injury in patients with ankle fractures. The results showed age- and gender-dependent low bone attenuation and low-energy trauma in elderly females, which suggest the osteoporotic features of ankle fractures. INTRODUCTION This study was performed to investigate the osteoporotic features of ankle fracture in terms of bone attenuation and cause of injury. METHODS One hundred ninety-four patients (mean age 51.0 years, standard deviation 15.8 years; 98 males and 96 females) with ankle fracture were included. All patients underwent CT examination, and causes of injury (high/low-energy trauma) were recorded. Mean bone attenuations of the talus, medial malleolus, lateral malleolus, and distal tibial metaphysis were measured on CT images. Patients were divided into younger age (<50 years) and older age (≥50 years) groups, and mean bone attenuation and causes of injury were compared between the two groups in each gender. RESULTS Proportion of low-energy trauma was higher in the older age group than in the younger age group, but the difference was only significant in female gender (p = 0.011). The older age group showed significantly lower bone attenuation in the talus, medial malleolus, lateral malleolus, and distal tibial metaphysis than the younger age group in both genders. The older age group showed more complex pattern of fractures than the younger age group. With increasing age, bone attenuations tended to decrease and the difference of bone attenuation between the genders tended to increase in the talus, medial malleolus, lateral malleolus, and distal tibial metaphysis. CONCLUSIONS Ankle fracture had features of osteoporotic fracture that is characterized by age- and gender-dependent low bone attenuation. Ankle fracture should not be excluded from the clinical and research interest as well as from the benefit of osteoporosis management.
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Affiliation(s)
- K M Lee
- Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, 300 Gumi-Dong, Bundang-Gu, Seongnam, Gyeonggi, 463-707, South Korea
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Yoon YA, Song JS, Lee SY, Yoon CE, Kang ES. The novel allele HLA-C*03:04:36 identified by sequence-based typing. ACTA ACUST UNITED AC 2013; 82:353-4. [PMID: 24102105 DOI: 10.1111/tan.12197] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Accepted: 08/12/2013] [Indexed: 11/28/2022]
Abstract
The new allele, HLA-C*03:04:36, differs from C*03:04:01:01 by one nucleotide substitution at codon 207 (GGC→GGT).
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Affiliation(s)
- Y A Yoon
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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Jang SY, Shin DY, Lee EJ, Lee SY, Yoon JS. Erratum: Relevance of TSH-receptor antibody levels in predicting disease course in Graves’ orbitopathy: comparison of the third-generation TBII assay and Mc4-TSI bioassay. Eye (Lond) 2013. [DOI: 10.1038/eye.2013.193] [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: 11/09/2022] Open
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125
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Affiliation(s)
- Siu Yin Lee
- Department
of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China
| | - Kin Shing Chan
- Department
of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China
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Sun JM, Kim JR, Do IG, Lee SY, Lee J, Choi YL, Ahn JS, Ahn MJ, Park K. A phase-1b study of everolimus plus paclitaxel in patients with small-cell lung cancer. Br J Cancer 2013; 109:1482-7. [PMID: 23963141 PMCID: PMC3776982 DOI: 10.1038/bjc.2013.467] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [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: 04/24/2013] [Revised: 07/12/2013] [Accepted: 07/21/2013] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND The mammalian target of rapamycin (mTOR) pathway is dysregulated in small-cell lung cancer (SCLC) and everolimus is an oral mTOR inhibitor. METHODS This phase-1b study assessed everolimus safety at the levels of 2.5, 5, or 10 mg once daily in combination with paclitaxel (175 mg m(-2)) once every 3 weeks in previously treated SCLC patients. The primary end point was to determine the maximum tolerated dose of everolimus. RESULTS Among 21 enrolled patients, common drug-related adverse events were anaemia, neutropenia, thrombocytopenia, pain, hyperglycemia, and stomatitis. Out of 11 evaluable patients treated with everolimus at the level of 5 mg, 1 patient experienced dose-limiting toxicity (DLT) of grade 4 febrile neutropenia and grade 3 thrombocytopenia. The other two DLTs (grade 4 thrombocytopenia and grade 3 hyperglycemia) occurred in two out of three patients receiving everolimus 10 mg. The overall objective response rate was 28%. CONCLUSION Everolimus showed an acceptable safety profile and preliminary antitumour activity at the dose of 5 mg once daily when combined with 3-weekly paclitaxel 175 mg m(-2) in patients with SCLC.
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Affiliation(s)
- J M Sun
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Irwon-dong, Gangnam-gu, Seoul 135-710, Korea
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127
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Shen C, Schooling CM, Chan WM, Xu L, Lee SY, Lam TH. Alcohol intake and death from cancer in a prospective Chinese elderly cohort study in Hong Kong. J Epidemiol Community Health 2013; 67:813-20. [PMID: 23908461 DOI: 10.1136/jech-2013-202684] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
BACKGROUND In observational studies of Western populations, moderate alcohol use is usually associated with lower cancer mortality rates. However, moderate alcohol use (regular drinking of moderate amounts) is socially patterned. Evidence from other contexts can clarify such observations. We examined the association of moderate alcohol use with death from cancer in older Chinese adults from a developed non-Western setting, where occasional alcohol drinking (less than once per week of small amounts) is typical. METHODS Multivariable Cox regression analysis was used to assess the adjusted associations of alcohol use with death from cancer using a population-based prospective cohort of 66 820 Chinese aged ≥ 65 years enrolled from July 1998 to December 2001 at all the 18 Elderly Health Centres of the Hong Kong Government Department of Health, and followed till 30 May 2012. RESULTS After follow-up for about 10.5 years, 6335 cancer deaths were identified. Most current alcohol users were social drinkers (<1/week). Moderate drinkers had a similar risk of death from non-oesophageal cancer as never drinkers, but a higher risk of oesophageal cancer, adjusted for age, sex, socioeconomic position, lifestyle and health status. Social drinking (<1/week) was associated with a lower risk of death from non-oesophageal cancer, but not from oesophageal cancer. CONCLUSIONS In a non-Western setting, no association of moderate alcohol use with death from cancer was found. Occasional social drinking (<1/week) was associated with a lower risk of cancer, suggesting that moderate alcohol use is not protective, but in any setting the attributes of being a typical drinker may be.
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Affiliation(s)
- Chen Shen
- Lifestyle and Life Course Epidemiology Group, Li Ka Shing Faculty of Medicine, School of Public Health, The University of Hong Kong, , Hong Kong, Hong Kong SAR, China
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128
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Lee SY, Kumar Y, Cho JM, Kim SW. Low-power passive focus measure operator based on the DCT for mobile phones. The Imaging Science Journal 2013. [DOI: 10.1179/174313108x344470] [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] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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129
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Ou SM, Lee SY, Chen JY, Cheng HW, Wei TH, Yu KW, Lin WM, King KL, Yang WC, Ng YY. First identification of Gordonia sputi in a continuous ambulatory peritoneal dialysis patient with Peritonitis. Perit Dial Int 2013; 33:107-8. [PMID: 23349205 DOI: 10.3747/pdi.2012.00030] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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130
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Kim SH, Lee SY, Hong CY, Gwak KS, Park MJ, Smith D, Choi IG. Whitening and antioxidant activities of bornyl acetate and nezukol fractionated from Cryptomeria japonica essential oil. Int J Cosmet Sci 2013; 35:484-90. [PMID: 23714012 DOI: 10.1111/ics.12069] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Accepted: 05/20/2013] [Indexed: 11/27/2022]
Abstract
OBJECTIVES The aim of this study was to investigate the whitening and antioxidant activities of essential oils from Cryptomeria japonica by determining their tyrosinase inhibition, 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging and superoxide dismutase (SOD)-like activities. METHODS Essential oils of C. japonica leaves were extracted with distilled water, and after condensation of volatile constituents, the condensates were extracted with ethyl acetate. Crude essential oils of C. japonica were divided into six fractions by thin layer chromatography and open column chromatography, and their chemical analysis was performed by GC/MS. Major compounds of fractions were composed of kaurene, bornyl acetate, nezukol, (-)-4-terpineol, δ-cadinene, α-terpineol, γ-eudesmol, α-eudesmol and elemol. RESULTS For tyrosinase inhibitory activity using two substrates, l-tyrosine and 3,4-dihydroxyphenylalanine (l-DOPA), kaurene, bornyl acetate and nezukol were highly effective. In antioxidant activity, (-)-4-terpinenol and δ-cadinene showed high DPPH radical scavenging activity, and bornyl acetate and nezukol indicated extremely high SOD-like activity. CONCLUSION Therefore, bornyl acetate and nezukol fractionated from C. japonica essential oil, which showed highly active whitening and antioxidant activities, have potential applications in cosmeceutical materials.
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Affiliation(s)
- S H Kim
- Department of Forest Sciences, College of Agriculture & Life Sciences, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul, 151-921, Korea
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Dougal G, Lee SY. Evaluation of the efficacy of low-level light therapy using 1072 nm infrared light for the treatment of herpes simplex labialis. Clin Exp Dermatol 2013; 38:713-8. [PMID: 23731454 DOI: 10.1111/ced.12069] [Citation(s) in RCA: 11] [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] [Accepted: 08/06/2012] [Indexed: 01/10/2023]
Abstract
BACKGROUND Recent research has shown that low-level light therapy (LLLT) using 1072 nm infrared light is effective in reducing the duration of herpes simplex labialis (HSL) episodes and enhancing the healing process. METHODS This was a prospective, randomized, placebo-controlled, clinical trial to evaluate the efficacy of a 1072 nm light-emitting diode device for the treatment of HSL. In total, 87 patients with recurrent HSL were recruited and randomly divided into two groups. Subjects received a 3-min treatment with either 1072 nm infrared light therapy or placebo (sham) light therapy three times/day for 2 days. The devices used for both groups were identical in appearance and could not be differentiated by volunteers or researchers, and 1072 nm light is invisible to the human eye. The primary endpoint was healing time, which was taken as the time for the HSL lesions to resolve fully and for the underlying skin to become completely re-epithelialized, and the secondary endpoint was lesion crusting. RESULTS The median time to healing for the active group was 129 h, compared with 177 h for the control group, which was significant (P = 0.01). There was no difference between the two groups for median time to lesion crusting (P = 0.66). CONCLUSIONS Compared with placebo treatment, the treatment of HSL lesions with 1072 nm infrared light significantly reduced healing time.
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Affiliation(s)
- G Dougal
- Virulite Distribution Ltd, Evans Incubation Centre, Newton Aycliffe, Durham, UK
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Abstract
BACKGROUND AND PURPOSE Hemorrhagic stroke is more common in non-Western settings and does not always share risk factors with other cardiovascular diseases. The association of smoking with hemorrhagic stroke subtypes has not been established. We examined the association of cigarette smoking with hemorrhagic stroke, by subtype (intracerebral hemorrhage and subarachnoid hemorrhage), in a large cohort of older Chinese from Hong Kong. METHODS Multivariable Cox regression analysis was used to assess the adjusted associations of smoking at baseline with death from hemorrhagic stroke and its subtypes, using a population-based prospective cohort of 66 820 Chinese aged>65 years enrolled from July 1998 to December 2001 at all the 18 Elderly Health Centers of the Hong Kong Government Department of Health and followed until May 31, 2012. RESULTS After follow-up for an average of 10.9 years (SD=3.1), 648 deaths from hemorrhagic stroke had occurred, of which 530 (82%) were intracerebral hemorrhage. Current smoking was associated with a higher risk of hemorrhagic stroke (hazard ratio, 2.19; 95% confidence interval, 1.49-3.22), intracerebral hemorrhage (1.94; 1.25-3.01), and subarachnoid hemorrhage (3.58; 1.62-7.94), adjusted for age, sex, education, public assistance, housing type, monthly expenditure, alcohol use, and exercise. Further adjustment for hypertension and body mass index slightly changed the estimates. CONCLUSIONS Smoking is strongly associated with hemorrhagic stroke mortality, particularly for subarachnoid hemorrhage.
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Affiliation(s)
- Lin Xu
- Department of Community Medicine and School of Public Health, The University of Hong Kong, Hong Kong, China
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Salmon S, Wang XB, Seetoh T, Lee SY, Fisher DA. A novel approach to improve hand hygiene compliance of student nurses. Antimicrob Resist Infect Control 2013; 2:16. [PMID: 23721611 PMCID: PMC3679881 DOI: 10.1186/2047-2994-2-16] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [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: 01/27/2013] [Accepted: 04/09/2013] [Indexed: 11/22/2022] Open
Abstract
Background The National University Hospital, Singapore routinely undertakes standardized Hand Hygiene auditing with results produced by ward and by staff type. In 2010 concern was raised over consistently low compliance by nursing students averaging 45% (95% CI 42%–48%) prompting us to explore novel approaches to educating our next generation of nurses to improve their hand hygiene practice. We introduced an experiential learning assignment to final year student nurses on attachment to NUH inclusive of hand hygiene auditor training followed by a period of hand hygiene observation. The training was based on the World Health Organisation (WHO) “My 5 moments for hand hygiene” approach. Upon completion students completed an anonymous questionnaire to evaluate their learning experience. Findings By 2012, nursing students were 40% (RR: 1.4, 95% CI 1.3–1.5, p<0.001) more likely to comply with hand hygiene practices. 97.5% (359/368) of nursing students felt that the experience would enhance their own hand hygiene practice and would recommend participating in audits as a learning instrument. Conclusions With consideration of all stakeholders a sustainable, flexible, programme was implemented. Experiential learning of hand hygiene was a highly valued educational tool and in our project was directly associated with improved hand hygiene compliance. Feedback demonstrated popularity amongst participants and success in achieving its program objectives. While this does not guarantee long term behavioural change it is intuitive that instilling good habits and messages at the early stages of a career will potentially have significant long-term impact.
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Affiliation(s)
- Sharon Salmon
- Infection Control Team, National University Health System, 1E Kent Ridge Rd, Singapore 119228, Singapore.
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De Virgilio A, Park YM, Kim WS, Byeon HK, Lee SY, Kim SH. Transoral robotic surgery for the resection of parapharyngeal tumour: our experience in ten patients. Clin Otolaryngol 2013; 37:483-8. [PMID: 23253343 DOI: 10.1111/j.1749-4486.2012.02525.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/23/2012] [Indexed: 11/30/2022]
Affiliation(s)
- A De Virgilio
- Department of Otorhinolaryngology, Sapienza University of Rome, Rome, Italy
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Yang SD, Jeong KS, Yun HJ, Kim YM, Lee SY, Oh JS, Lee HD, Lee GW. Analysis of flicker noise for improved data retention characteristics in silicon-oxide-high-k-oxide-silicon flash memory using N2 implantation. J Nanosci Nanotechnol 2013; 13:3331-3334. [PMID: 23858853 DOI: 10.1166/jnn.2013.7294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In this paper, we fabricate planar-type Silicon-Oxide-High-k-Oxide-Silicon (SOHOS) and the planar-type SOHOS devices with N2 implantation of 3 x 10(15) dose in a tunneling oxide to determine the impact of N2 implantation in the tunneling oxide of a memory device. The N2 implantation device has better retention characteristics than the device with no implantation. In order establish the correlation between N2 implantation and retention characteristic improvement, the low frequency noise (1/f noise) characteristic is investigated. The normalized drain current noise (S(ID)/I(D)2) level of the N2 implantation device is higher than that of the device with no implantation, which means that N2 implantation causes more trap formation near the interface. Considering that N2 implantation does not affect the DC transfer characteristics, such as mobility and sub-threshold slope, this finding indicates that the increase in the 1/f noise level is due to oxide traps rather than to interface traps. Therefore, the retention characteristic improvement in the N2 implantation device can be explained by the generation of higher number of oxide traps and an increase in the potential barrier blocking the leakage path in the tunneling oxide.
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Affiliation(s)
- S D Yang
- Department of Electronics Engineering, Chungnam National University, Daejeon 305-764, Korea
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136
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Lee SY, Ng KY, Liu H, Chao HC. Evolution of beam distribution in crossing a Walkinshaw resonance. Phys Rev Lett 2013; 110:094801. [PMID: 23496717 DOI: 10.1103/physrevlett.110.094801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2012] [Indexed: 06/01/2023]
Abstract
The third-integer coupling resonance at ν(x)-2ν(z)=ℓ, known as the Walkinshaw resonance, is important in high-power accelerators. We find that, when the betatron tunes ramp through a Walkinshaw resonance the fractional emittance growth (FEG) is a universal function of the effective resonance strength: G(1,-2,ℓ)√[ε(xi)]|Δ(ν(x)-2ν(z))/Δn|(-1/2), where G(1,-2,ℓ) is the resonance strength; ε(xi) and ε(zi) are the initial horizontal and vertical emittances, respectively; and |Δ(ν(x)-2ν(z))/Δn| is the resonance crossing rate per revolution. At large effective resonance strengths, the FEG reaches an asymptotic maximum value (FEG)(max)~2ε(xi)/ε(zi) for ε(xi)>>1/2ε(zi) or ε(zi)/(2ε(xi)) for ε(xi)<<1/2ε(zi). There is little emittance exchange at ε(xi)=1/2ε(z), which can be used to minimize emittance growth in crossing a Walkinshaw resonance.
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Affiliation(s)
- S Y Lee
- Department of Physics, Indiana University, Bloomington, Indiana 47405, USA
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Kang HS, Hong SN, Kim YS, Park HS, Kim BK, Lee JH, Kim SI, Lee TY, Kim JH, Lee SY, Sung IK, Shim CS. The efficacy of i-SCAN for detecting reflux esophagitis: a prospective randomized controlled trial. Dis Esophagus 2013; 26:204-11. [PMID: 23009249 DOI: 10.1111/j.1442-2050.2012.01427.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
New imaging technologies have been applied in endoscopy to improve the detection and differentiation of subtle mucosal changes using a digital contrast method. Among them, i-SCAN technology is the most recently developed image-enhancing technology. We investigated whether i-SCAN could improve the detection rate of reflux esophagitis. Interobserver agreement between endoscopists was compared with conventional white light (WL) endoscopic examination. We performed a prospective randomized controlled trial. A consecutive series of 514 subjects that underwent an esophagogastroduodenoscopy for health inspection were enrolled and randomized into the i-SCAN group (n = 246) and WL group (n = 268). An esophagogastroduodenoscopy with video recording was used for detecting reflux esophagitis, and reflux esophagitis were categorized by the modified Los Angeles (LA) classification. The total number of reflux esophagitis identified by WL and i-SCAN was 58 (21.7%) and 74 (30.1%), respectively. The diagnostic yield of reflux esophagitis was significantly higher (P = 0.034) in the i-SCAN group (30.1%) as compared to the WL group (21.6%). Using the modified LA classification, the detection rate of minimal changes was significantly higher (P = 0.017) in the i-SCAN group (11.8%) as compared to the WL group (5.6%), but the detection rates of LA-A and LA-B were not significantly different between the two groups (P = 0.897 and P = 0.311, respectively). After comparison of the interobserver agreement using randomly selected video clips, the i-SCAN group showed better agreement than the WL group (Kappa value, 0.793 vs. 0.473). Compared to WL endoscopy, applying i-SCAN in daily practice can improve the diagnostic yield of reflux esophagitis by detecting more minimal changes in the squamo-columnar junction of the esophagus and can improve the interobserver agreement of the modified Los Angeles classification.
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Affiliation(s)
- H S Kang
- Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea
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Kim CH, Lim JK, Lee SY, Won DI, Cha SI, Park JY, Lee WK, Lee J. Predictive factors for tuberculosis in patients with a TB-PCR-negative bronchial aspirate. Infection 2013; 41:187-94. [PMID: 23283746 DOI: 10.1007/s15010-012-0394-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Accepted: 12/17/2012] [Indexed: 11/30/2022]
Abstract
PURPOSE Pulmonary tuberculosis (PTB), with a tuberculosis (TB)-polymerase chain reaction (PCR)-negative bronchial aspirate (BA), but a positive culture result is often encountered in clinical practice. However, limited data are available concerning clinical judgment in patients with suspected PTB and a TB-PCR-negative BA pending culture results. The present study aimed to identify predictors for PTB in patients with a TB-PCR-negative BA. METHODS A retrospective study was conducted on patients who had undergone a bronchoscopy because of suspected PTB. Clinical, laboratory, and computed tomography (CT) findings were investigated in PTB patients with TB-PCR-negative but positive culture BA results, and non-PTB patients with a radiographic lesion comparable to the former. RESULTS Of 250 patients screened, 31 (12 %) were diagnosed with PTB by positive culture results only. Of these 31 patients, 30 (97 %) had a lesion within one-third of the hemithorax as determined by chest radiography. In the final analysis of 30 PTB and 65 non-PTB patients with comparable radiographic lesions, a positive QuantiFERON-TB Gold In-Tube (QFT) result was independently associated with an increased risk of a positive TB culture. CT findings of consolidation were a negative predictor for PTB. Patients with a negative QFT result and consolidation had a negative predictive value of 95 % for PTB, while patients with a positive QFT result and nodular CT abnormalities without consolidation had a positive predictive value of 86 % for PTB. CONCLUSION The simple combination of CT findings of consolidation and QFT test results may help clinicians to refine decision-making in patients with a TB-PCR-negative BA.
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Affiliation(s)
- C H Kim
- Department of Internal Medicine, School of Medicine, Kyungpook National University, Daegu, South Korea.
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139
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Lee SY, Maniquiz MC, Choi JY, Jeong SM, Kim LH. Seasonal nutrient uptake of plant biomass in a constructed wetland treating piggery wastewater effluent. Water Sci Technol 2013; 67:1317-1323. [PMID: 23508157 DOI: 10.2166/wst.2013.002] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The surface-flow constructed wetland (CW) located in Nonsan City, South Korea, and constructed as the final stage of a piggery wastewater treatment plant that aims to treat high nutrient content effluent during dry days and stormwater runoff during wet days was monitored from October 2008 to November 2011. This research investigated the seasonal nutrient uptake of plant biomass in the CW and nutrient concentration changes in each treatment region under monsoon and temperate climate conditions. Results showed that the mean total nitrogen removal during summer (June to August) was higher by 13% than in spring (March to May), while total phosphorus removal was higher by 22% in fall (September to November) than in winter (December to February). All plants in the CW reached their maximum biomass coverage and weight in summer and minimum growth in winter. The highest N and P content in plants occurred in September with 583.2 g/m(2) and August with 62.0 g/m(2), respectively. Based on the results, it is recommended that the harvesting of plants should be conducted during the time of the peak nutrient uptake and before the plants release the nutrient content back to the CW. The dependence of nutrient removal efficiency on plants is not so significant. In order to increase the nutrient removal rate by plant uptake, it is suggested that the treatment regions in the CW be covered by plants.
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Affiliation(s)
- S Y Lee
- Department of Civil & Environmental Engineering, Kongju National University, 275 Budae-dong, Cheonan, Chungnamdo 330-717, Korea.
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140
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Affiliation(s)
- Chung Sum Chan
- Department of Chemistry, The Chinese University of Hong Kong,
Shatin, New Territories, Hong Kong, People’s Republic of China
| | - Siu Yin Lee
- Department of Chemistry, The Chinese University of Hong Kong,
Shatin, New Territories, Hong Kong, People’s Republic of China
| | - Kin Shing Chan
- Department of Chemistry, The Chinese University of Hong Kong,
Shatin, New Territories, Hong Kong, People’s Republic of China
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141
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Mitchell EP, Avery TP, Jaslow RC, Berger AC, Lee SY, Vaughan-Briggs C, Bonat J. Abstract P5-14-03: Breast cancer screening and follow-up of abnormal mammogram results: A population-based study comparing results from an urban university cancer center to a national database. Cancer Res 2012. [DOI: 10.1158/0008-5472.sabcs12-p5-14-03] [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: To improve access to screening, the National Breast and Cervical Cancer Early Detection Program (NBCCEDP) was developed through the Centers for Disease Control and Prevention (CDC) to provide low-income, and uninsured underserved women access to timely breast and cervical cancer screening and diagnostic services. This population-based study investigates the demographics and diagnostic outcomes of women who underwent breast cancer screening through this program established at an urban university cancer center compared to data obtained from the national program database.
Methods: The Kimmel Cancer Center at Jefferson (KCC) launched its screening program with resources from the CDC, the State of Pennsylvania, and the Susan G. Komen Foundation in 2008. The core of the program is staff lead by a Social Worker/Navigator who connects patients to education and screening services, institutional information and guidance, and follow-up to minimize barriers to access, lessen dropout, and ensure follow-through for timely diagnosis and treatment. Working with our Community-Based partner organizations, uninsured and underinsured women in Philadelphia are able to seamlessly travel from education and screening through to treatment and support. All KCC patients evaluated through this program from 2008–2011 were included and records of the NBCCDP database 2006–2010 for this study and analyses.
Results: KCC has a substantially larger African American (54.44% vs. 13.8%), smaller Hispanic (8.59% vs. 27.6%), larger percentage of abnormal mammograms (25.96% vs. 14%), higher breast cancer diagnosed per mammogram (2.13 vs 1.0) and a much younger population than the national cohort. Fewer than 1% of KCC patients have been lost to follow-up.
Conclusions: The KCC Breast and Cervical Screening and Treatment Program Services reaches a highly vulnerable and at-risk population, has a higher abnormal mammogram and breast cancer detection rate, and a higher continued participation rate than the national cohort. The Social/Worker/Navigator has a distinct role in providing follow-up for abnormal findings to minimize no-shows by providing creative problem-solving, support, counseling, finding resources to minimize barriers, and contributes significantly to the ease of operation and the continued participation of patients in the program.
Citation Information: Cancer Res 2012;72(24 Suppl):Abstract nr P5-14-03.
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Affiliation(s)
- EP Mitchell
- Thomas Jefferson University, Philadelphia, PA
| | - TP Avery
- Thomas Jefferson University, Philadelphia, PA
| | - RC Jaslow
- Thomas Jefferson University, Philadelphia, PA
| | - AC Berger
- Thomas Jefferson University, Philadelphia, PA
| | - SY Lee
- Thomas Jefferson University, Philadelphia, PA
| | | | - J Bonat
- Thomas Jefferson University, Philadelphia, PA
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Chung BN, Choi YJ, Choi KH, Do YS, Lee SY. First Report of Stolbur Phytoplasma Infection in Commercial Freesia hybrida Cultivars. Plant Dis 2012; 96:1820. [PMID: 30727291 DOI: 10.1094/pdis-07-12-0677-pdn] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In January 2012, disease symptoms including chlorosis, leaf crinkle, leaf curving and stunting of whole plants, virescence, and curving and necrosis of flower stalks were observed in Freesia hybrida cvs. Evone, Honey Moon, Golden Gem, and Pallas in Icheon and Suwon (Gyeonggi Province in Korea). To determine a possible phytoplasma infection, the symptomatic freesia plants were examined for the presence of phytoplasma 16S rDNA fragment by PCR with the primer pair P1/P6 (2) and R16F1/R16R1 (in nested PCR), which amplifies phytoplasma 16S rDNA regions (4). An expected PCR product of ~1,096 bp was obtained from the symptomatic freesia plants, and they were designated as FreLN, Fre-phy-Ev4, Fre-phy-Ev6, Fre-phy-GG, Fre-phy-HM, and Fre-phy-Pal. The PCR products were sequenced and registered as GenkBank accessions AB695174 and AB709951-55. The sequence corresponding to symptomatic freesia had 98.8 to 99.4% identity with Stolbur phytoplasma strains in the 16S rDNA region, and it had only 95.7 to 96.3% identity with AY phytoplasma strains. In the ultra-thin sections of the leaf midribs, globous phytoplasmal bodies 54 to 214 nm in size were observed in sieve tube elements of phloem tissue. Fre-Phy-Ev6 and Fre-Phy-HM were doube-infected with Stolbur phytoplasma and Freesia mosaic virus (FreMV). Fre-Phy-Ev6 and Fre-Phy-HM revealed necrosis of flower stalks and flower color breaking besides curving of flower stalks. Therefore, flower color breaking and flower stalk necrosis were assumed to be caused by FreMV (1). Symptoms of chlorosis and stunting of whole plants shown in FreLN and virescence of Fre-phy-GG were typical symptoms of phytoplasmal diseases, while leaf crinkle, leaf curving, and curving of flower stalks appeared to be unique symptoms in F. hybrida. Stolbur phytoplasma was abundant in commercial freesia cultivation fields. Some of the cultivars, such as cv. Pallas, showed only curving of leaf and flower stalks without any typical symptom of phytoplasmal diseases. A phytoplasmal disease was reported in Poland in 2001 from F. hybrida exhibiting leaf chlorotic and necrotic spots, and classified as AY I-B based on RFLP analysis of PCR products (3). To our knowledge, this is the first report of Stolbur phytoplasma in F. hybrida. This result is significant because F. hybrida could be the infection source of Stolbur phytoplasma disease in floricultural crops. Interestingly, we found a prevalence of Stolbur phytoplasma in Petunia hybrida cultivars (GenBank Accession Nos. AB713757 to AB713758). High nucleotide sequence identity of 99.8% in the 16S rDNA region of Stolbur phytoplasma isolates from petunia and freesia support the inference that those Stolbur phytoplasma isolates could infect both floricultural crops. References: (1) A. A. Brunt. Freesia. Page 274 in: Virus and virus-like Diseases of Bulb and Flower Crops, John Wiley & Sons, Chichester, 1995. (2) S. Deng and C. Hiruki. J. Microbiol. Methods. 14:53, 1991. (3) M. Kamińska and H. Sliwa. Plant Dis. 85:336, 2001. (4) I. M. Lee et al. Phytopathology 84:559, 1994.
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Affiliation(s)
- B N Chung
- National Institute of Horticultural and Herbal Science, RDA, Suwon 440-310, Rep. of Korea
| | - Y J Choi
- National Institute of Horticultural and Herbal Science, RDA, Suwon 440-310, Rep. of Korea
| | - K H Choi
- National Institute of Horticultural and Herbal Science, RDA, Suwon 440-310, Rep. of Korea
| | - Y S Do
- National Institute of Horticultural and Herbal Science, RDA, Suwon 440-310, Rep. of Korea
| | - S Y Lee
- National Institute of Horticultural and Herbal Science, RDA, Suwon 440-310, Rep. of Korea
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Ahn IE, Ju JH, Lee SY, Park JS, Oh HJ, Kim HR, Lee SH, Park SH, Kim HY, Cho ML. Upregulation of stromal cell-derived factor by IL-17 and IL-18 via a phosphatidylinositol 3-kinase-dependent pathway. Scand J Immunol 2012; 76:433-9. [PMID: 22690919 DOI: 10.1111/j.1365-3083.2012.02745.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Th17 cells that produce interleukin (IL)-17 play a key role in the pathogenesis of autoimmune inflammation. Among the various cytokines that are involved in the IL-17 pathway, members of the IL-1β family, including IL-18, have recently gained attention. In this study, we stimulated synovial fibroblasts with a combination of IL-17 and IL-18 and quantified their stromal cell-derived factor-1 (SDF-1) production by enzyme-linked immunosorbent assay and their transcript levels by reverse transcription-polymerase chain reaction. Both IL-17 and IL-18 significantly increased the level of SDF-1, not only individually but also synergistically (P< 0.05). The synergism was effectively suppressed by anti-IL-17 and -IL-18 antibodies, and a PI3K inhibitor. To the best of our knowledge, this is the first report of PI3K-dependent synergism between IL-18 and IL-17, and this work adds a novel perspective of the role of IL-18 in immune regulation. The individual effects of these two cytokines, and their interactions, suggest an interrelationship between the IL-1 family and IL-17.
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Affiliation(s)
- I E Ahn
- Rheumatism Research Center (RhRC), Catholic Institute of Medical Sciences, The Catholic University of Korea, Seoul, Korea
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144
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Lee SY, Park HR, Cho NH, Choi YP, Rha SY, Park SW, Kim SH. Identifying genes related to radiation resistance in oral squamous cell carcinoma cell lines. Int J Oral Maxillofac Surg 2012. [PMID: 23196067 DOI: 10.1016/j.ijom.2012.10.022] [Citation(s) in RCA: 25] [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] [Indexed: 12/13/2022]
Abstract
Radioresistance is one of the main determinants of treatment outcome in oral cancer, but the prediction of radioresistance is difficult. The authors aimed to establish radioresistant oral squamous cell carcinoma (OSCC) cell lines to identify genes with altered expression in response to radioresistance. To induce radioresistant cell lines, the authors treated OSCC cell lines with an accumulated dosage of 60Gy over 30 cycles of radiotherapy. They compared the results from cDNA arrays and proteomics between non-radiated and radioresistant cell lines in order to identify changes in gene expression. Western blot analysis was used to validate the results. The cDNA array revealed 265 commonly up-regulated genes and 268 commonly down-regulated genes in radioresistant cell lines, 30 of which were cancer-related genes. Proteomics identified 51 proteins with commonly altered expression in radioresistant cell lines, 18 of which were cancer-related proteins. Both the cDNA array and proteomics indicated that NM23-H1 and PA2G4 were over-expressed. Western blot analysis showed increased expression of NM23-H1, but not PA2G4, in radioresistant cell lines. The authors concluded that NM23-H1 may be a radioresistance-related gene and over-expression of NM23-H1 could serve as a biomarker to predict radioresistance in OSCC.
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Affiliation(s)
- S Y Lee
- Department of Otolaryngology-Head and Neck Surgery, Chung-Ang University College of Medicine, Seoul, Republic of Korea
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145
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Oh HJ, Park EJ, Lee SY, Soh JW, Kong IS, Choi SW, Ra JC, Kang SK, Lee BC. Comparison of cell proliferation and epigenetic modification of gene expression patterns in canine foetal fibroblasts and adipose tissue-derived mesenchymal stem cells. Cell Prolif 2012; 45:438-44. [PMID: 22925503 DOI: 10.1111/j.1365-2184.2012.00838.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
OBJECTIVES This study compared rate of cell proliferation, viability, cell size, expression patterns of genes related to pluripotency and epigenetic modification between canine foetal fibroblasts (cFF) and canine adipose tissue-derived mesenchymal stem cells (cAd-MSC). MATERIALS AND METHODS Proliferation pattern, cell viability as well as cell size at each passage of cFF and cAd-MSC were measured when cultures reached confluence. In addition, real-time PCR was performed to investigate expression of Dnmt1, HDAC1, OCT4, SOX2, BAX, BCL2 genes with reference to β-actin gene expression as an endogenous control in both cell lines. RESULTS cFF and cAd-MSC differed in number of generations, but not in doubling times, at all passages. Mean cell size of cAd-MSC was significantly smaller than that of cFF. Cell viability was significantly lower in cFFs and apoptotic level was significantly lower in cAd-MSC compared to passage-matched cFF. In the expression of genes related to pluripotency and epigenetic modification, level of HDAC1 in cAd-MSC was significantly higher than in cFF, but expression of Dnmt1 did not differ between the two groups. OCT4 and SOX2 were significantly more highly expressed in cAd-MSC compared to cFF. CONCLUSIONS cAd-MSC have higher stem-cell potential than cFF in terms of proliferation patterns, epigenetic modification and pluripotency, thus cAd-MSC could be more appropriate than cFF as donors of nuclei in somatic cell nuclear transfer for transgenesis.
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Affiliation(s)
- H J Oh
- Department of Theriogenology and Biotechnology, Seoul National University, Seoul, South Korea
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146
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147
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Chang KW, Lin MC, Lee SY, Chen HY, Chen CC, Fu YK. Effects of [123I]ADAM, a serotonin transporter radiopharmaceutical, on pregnant Sprague-Dawley rats. Appl Radiat Isot 2012; 70:2646-51. [PMID: 22960183 DOI: 10.1016/j.apradiso.2012.06.024] [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] [Received: 01/21/2011] [Revised: 06/20/2012] [Accepted: 06/21/2012] [Indexed: 11/26/2022]
Abstract
Serotonin transport abnormalities are implicated in neuropsychiatric disorders. [(123)I]ADAM ([(123)I]-2-([2-({dimethylamino}methyl)phenyl]thio)-5-iodophenylamine) is a novel radiotracer that targets serotonin transporters. We assessed the toxicity of [(123)I]ADAM (18.5 MBq) administered in early- and late-phases (8 and 14 day postfertilization, respectively) of pregnancy. The mortality, clinical status, and gross necropsy were measured in pregnant rats, and the fertility index was measured in rat offspring (weight, clinical observations). We found no dosing-related clinical signs. In conclusion, [(123)I]ADAM was not toxic in an animal pregnancy model.
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Affiliation(s)
- K W Chang
- Institute of Nuclear Energy Research, Division of Isotope Application, Taoyuan County, Taiwan
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148
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Kim YH, Lee SY, Sagong HG, Heu S, Ryu S, Kang DH. Development and evaluation of a new device to effectively detach micro-organisms from food samples. Lett Appl Microbiol 2012; 55:256-62. [PMID: 22803600 DOI: 10.1111/j.1472-765x.2012.03289.x] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
AIMS To develop a new instrument of great versatility for recovering micro-organisms from all types of food samples and to compare the effects with existing sample preparation methods. METHODS AND RESULTS To detach micro-organisms from large-size unbroken food samples such as apples, carrots, potatoes and tomatoes without preprocessing, the Spindle apparatus was newly developed. The Spindle was used to effectively detach micro-organisms from large-size samples. In a comparative study involving 51 food samples, treatment with the Spindle and Stomacher showed that recovery of total aerobic micro-organisms (naturally occurring mesophilic microflora) and foodborne pathogens (from samples inoculated with Escherichia coli O157:H7, Salmonella Typhimurium and Listeria monocytogenes) for both methods was highly correlated (R² = 0·98). Furthermore, diluents treated by the Spindle contained much less food debris than those treated by stomaching. CONCLUSIONS These results indicate that Spindle is a novel, effective alternative method for detaching micro-organisms from food samples including four kinds of large-size samples without the need for preprocessing. SIGNIFICANCE AND IMPACT OF STUDY The Spindle might be used to widely detaching micro-organisms from all types of food samples for microbiological assay.
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Affiliation(s)
- Y H Kim
- Department of Food and Biotechnology, Center for Agricultural Biomaterials, Seoul National University, Seoul, Korea
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149
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Kim YM, Jeong KS, Yun HJ, Yang SD, Lee SY, Kim MJ, Kwon OS, Jeong CW, Kim JY, Kim SC, Lee GW. Electrical characteristic analysis using low-frequency noise in low-temperature polysilicon thin film transistors. J Nanosci Nanotechnol 2012; 12:5532-5536. [PMID: 22966605 DOI: 10.1166/jnn.2012.6336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
This study carried out an electrical characteristic analysis using low-frequency noise (LFN) in top gate p-type low-temperature polysilicon thin film transistors (LTPS TFTs) with different active layer thicknesses between 40 nm and 80 nm. The transfer characteristic curves show that the 40-nm device has better electrical characteristics compared with the 80-nm device. The carrier number fluctuation, with and without correlated mobility fluctuation model in both devices, has modeled well the measured noise. On the other hand, the trap density and coulomb scattering in the 40-nm device are smaller compared with the 80-nm device. To confirm the effectiveness of the LFN noise analysis, the trap densities at a grain boundary are extracted using in both devices the similar methods of Proano et al. and Levinson et al. That is, coulomb scattering, caused by the trapped charges at or near the interface, has a greater effect on the device with inferior electrical properties. Based on the LFN and the quantitative analysis of the trap density at a grain boundary, the interface traps between the active layer and the gate insulator can explain the devices' electrical degradation.
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Affiliation(s)
- Y M Kim
- Department of Electronics Engineering, Chungnam National University, Daejeon, 305-764, Korea
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150
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Lee JH, Oh YM, Seo JB, Lee YK, Kim WJ, Sheen SS, Kim TH, Lee JH, Kim EK, Lee JS, Huh JW, Lim SY, Yoon HI, Shin TR, Lee SM, Lee SY, Lee SD. Pulmonary artery pressure in chronic obstructive pulmonary disease without resting hypoxaemia. Int J Tuberc Lung Dis 2012; 15:830-7. [PMID: 21575307 DOI: 10.5588/ijtld.10.0598] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Chronic obstructive pulmonary disease (COPD) can lead to pulmonary hypertension and cor pulmonale, which are predictors of mortality. OBJECTIVE To identify predictors of increased pulmonary artery pressure (PAP) in COPD patients without resting hypoxaemia, and to characterise COPD patients with increased PAP. DESIGN A study of 117 COPD patients from the Korean Obstructive Lung Disease (KOLD) cohort who had measurable tricuspid regurgitant flow under transthoracic Doppler echocardiography and no resting hypoxaemia. RESULTS The mean patient age was 67 years. Mean forced expiratory volume in 1 second (FEV(1)) was 47% predicted, mean haemoglobin (Hb) concentration was 145 g/l and mean systolic PAP (sPAP) was 33 mmHg. Multiple linear regression analysis showed that Hb was the only factor independently associated with sPAP (beta = -1.752, P = 0.005). Cluster analysis using FEV(1)% predicted, sPAP and Hb concentration as variables indicated three patient clusters: Cluster 1 (n = 36; mean FEV(1) 44% predicted, mean sPAP 39 mmHg, mean Hb 132 g/l), Cluster 2 (n = 45; FEV(1) 35% predicted, sPAP 31 mmHg, Hb 154 g/l), and Cluster 3 (n = 36; FEV(1) 65% predicted, sPAP 29 mmHg, Hb 148 g/l). CONCLUSION Elevated PAP was linked to low haemoglobin levels in COPD without resting hypoxaemia.
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Affiliation(s)
- J H Lee
- Department of Internal Medicine, Ewha Womans University School of Medicine, Ewha Medical Research Institute, Seoul, Republic of Korea
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