176
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Riddick G, Song H, Holbeck SL, Kopp W, Walling J, Ahn S, Zhang W, Fine HA. An in silico screen links gene expression signatures to drug response in glioblastoma stem cells. THE PHARMACOGENOMICS JOURNAL 2014; 15:347-53. [PMID: 25446780 DOI: 10.1038/tpj.2014.61] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Revised: 07/29/2014] [Accepted: 08/21/2014] [Indexed: 11/09/2022]
Abstract
Cancer stem cells (CSCs) are thought to promote resistance to chemotherapeutic drugs in glioblastoma, the most common and aggressive primary brain tumor. However, the use of high-throughput drug screens to discover novel small-molecule inhibitors for CSC has been hampered by their instability in long-term cell culture. We asked whether predictive models of drug response could be developed from gene expression signatures of established cell lines and applied to predict drug response in glioblastoma stem cells. Predictions for active compounds were confirmed both for 185 compounds in seven established glioma cell lines and 21 compounds in three glioblastoma stem cells. The use of established cell lines as a surrogate for drug response in CSC lines may enable the large-scale virtual screening of drug candidates that would otherwise be difficult or impossible to test directly in CSCs.
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177
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Park D, Yu H, Jung D, Park Y, Son S, Ahn S, Kim H. 37. Risk factors of postoperative pancreatic fistula in curative gastric cancer surgery. Eur J Surg Oncol 2014. [DOI: 10.1016/j.ejso.2014.08.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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178
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Kim I, Kong S, Jeong J, Ahn S, Kwon H, Kim Y. 69. Is lymph node assessment by MRI after neoadjuvant chemoradiation for rectal cancer useful? Eur J Surg Oncol 2014. [DOI: 10.1016/j.ejso.2014.08.066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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179
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Jwa E, Kim S, Ahn S, Kim S, Ahn J, Jung K, Son B, Ahn S, Lee J, Choi E, Kim J, Lee S, Kim Y, Park J, Yoon S, Song S. Retrospective Analysis of Risk Factors for Regional Recurrence for pN1 Patients After Breast Conserving Surgery. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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180
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Jeong Y, Lee S, Kwak J, Cho I, Yoon S, Kim J, Park J, Choi E, Song S, Kim Y, Kim S, Joo J, Ahn S. A Dosimetric Comparison of Volumetric Modulated Arc Therapy (VMAT) and Non-Coplanar Intensity Modulated Radiation Therapy (IMRT) for Nasal Cavity and Paranasal Sinus Cancer. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.2472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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181
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Lee S, Sung K, Lee S, Ahn S, Choi J, Lee K. Assessment of Tumor Volume and Serum Tumor Marker Levels During Chemoradiation Therapy for Cervix Cancer. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.1477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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182
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Yoon K, Cho I, Kwak J, Cho B, Kim Y, Ahn S, Lee S. Evaluation of CBCT-Based Dose Calculation in an Enhanced CBCT System. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.2462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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183
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Ahn S, Na K, Kim Y, Kim K, Oh I, Song S, Chung W, Nam T, Song J, Yoon M, Jeong J, Kim Y. Surgical Salvation After Full-Dose Concurrent Chemoradiation in Patients With Locally Advanced Non-Small Cell Lung Cancer (NSCLC). Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.1845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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184
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Mackala S, Ahn S, H d ro lu C, Michalak E, Yatham L, Ivan T. C-17 * The Association between Subjective Cognitive Functioning and Quality of Life in Bipolar Disorder. Arch Clin Neuropsychol 2014. [DOI: 10.1093/arclin/acu038.198] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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185
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KO Y, Cho B, Yi B, Kwak J, Song S, Je H, Ahn S, Noh Y. SU-E-T-185: Feasibility Study of Dose Rate Modulated Arc Therapy (DrMAT) for Lung SBRT. Med Phys 2014. [DOI: 10.1118/1.4888515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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186
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Song J, Yoon M, Nam T, Ahn S, Chung W. SU-E-T-163: Evaluation of Dose Distributions Recalculated with Per-Field Measurement Data Under the Condition of Respiratory Motion During IMRT for Liver Cancer. Med Phys 2014. [DOI: 10.1118/1.4888492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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187
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Kim S, Ahn S, Shin JH. P608: Ultrasound as a novel instrument for tremor evaluation and intervention. Clin Neurophysiol 2014. [DOI: 10.1016/s1388-2457(14)50701-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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188
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Choi Y, Cho B, Kwak J, Ahn S, Choi E, Kim J, Song S, Yoon S, Kim Y, Kim S, Park J. SU-E-T-269: Quality Assurance of Spine Volumetric Modulated Arc Therapy with Flattening Filter Free Beams Using Gafchromic EBT3 Films. Med Phys 2014. [DOI: 10.1118/1.4888600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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189
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Chung K, Kim J, Shin J, Han Y, Ju S, Hong C, Kim D, Kim H, Shin E, Ahn S, Chung S, Choi D. SU-E-T-239: Monte Carlo Modelling of SMC Proton Nozzles Using TOPAS. Med Phys 2014. [DOI: 10.1118/1.4888570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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190
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Yoon K, Kwak J, Cho B, Lee D, Ahn S. SU-E-T-104: Development of 3 Dimensional Dosimetry System for Gamma Knife. Med Phys 2014. [DOI: 10.1118/1.4888434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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191
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Ju S, Hong C, Kim M, Chung K, Kim J, Han Y, Ahn S, Chung S, Shin E, Shin J, Kim H, Kim D, Choi D. SU-E-T-195: Gantry Angle Dependency of MLC Leaf Position Error. Med Phys 2014. [DOI: 10.1118/1.4888525] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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192
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Williams R, Asrress K, Yousuff M, Goodwin C, Lumley M, Khawaja M, Myat A, Arri S, Patterson T, Lockie T, Nagel E, Perera D, Marber M, Chiribiri A, Redwood S, Plein S, Feistritzer H, Klug G, Reinstadler S, Mair J, Schocke M, Franz W, Metzler B, McGraw S, Mirza O, Bauml M, Gonzalez R, Dickens C, Farzaneh-Far A, McAlindon E, Vizzi V, Strange J, Edmond J, Johnson T, Baumbach A, Bucciarelli-Ducci C, Pharithi R, Meela M, Conway M, Kropmans T, Newell M, Aquaro G, Frijia F, Positano V, Santarelli M, Wiesinger F, Lionetti V, Giovannetti G, Schulte R, Landini L, Menichetti L, Amzulescu M, Rousseau M, Ahn S, de Ravenstein C, Vancraeynest D, Pasquet A, Vanoverschelde J, Pouleur A, Gerber B, Pfaffenberger S, Fandl T, Marzluf B, Babayev J, Juen K, Schenk P, Binder T, Vonbank K, Mascherbauer J, Almeida A, Sa A, Brito D, David C, Marques J, Almeida A, Silva D, de Sousa J, Diogo A, Pinto F, Masci P, Del Torto A, Barison A, Aquaro G, Chiappino S, Vergaro G, Passino C, Emdin M, Saba S, Sachdev V, Hannoush H, Axel L, Arai A, Mykhailova L, Kravchun P, Lapshina L. These abstracts have been selected for moderated presentations on SCREEN A. Please refer to the the PROGRAM and the infos on the screen for more details about schedule, moderators and presenters. Eur Heart J Cardiovasc Imaging 2014. [DOI: 10.1093/ehjci/jeu084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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193
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Lee H, Lee YS, Jeong R, Kim YJ, Ahn S. Predictive factors of bacteremia in patients with febrile urinary tract infection: an experience at a tertiary care center. Infection 2014; 42:669-74. [PMID: 24677052 DOI: 10.1007/s15010-014-0615-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Accepted: 03/15/2014] [Indexed: 12/16/2022]
Abstract
PURPOSE To investigate the clinical features in adult patients with febrile urinary tract infection (UTI) who visited the emergency department (ED) and to determine the predictive factors of bacteremia among the initial presenting clinical features. METHODS This retrospective cohort study was conducted at the ED of a tertiary hospital in Korea from 1 January 2012 to 31 December 2012. All adult patients who were diagnosed with febrile UTI and for whom data on blood and urine cultures were available were included in the study. Clinical examinations and laboratory tests were performed at the initial presentation. RESULTS A total of the 325 patients with febrile UTI (median age: 60 years) were included for analysis, of whom 82 % were female. Bacteremia was detected in 106 of the 325 patients (32.6 %), with Escherichia coli the most frequent pathogen detected (59.7 % of cases). Between the bacteremic and non-bacteremic groups, there was significant difference in age (67 vs. 57 years, respectively), flank pain (16 vs. 7.8 %), suprapubic discomfort (0 vs. 4.6 %), body temperature (38.8 vs. 38.3 °C), respiratory rate (21 vs. 20/min), platelet count (170 vs. 186 × 10(3)/μL), C-reactive protein (10.2 vs. 8.3 mg/dL), and procalcitonin (1.5 vs. 0.3 ng/mL) (P < 0.05 for all). In the multivariate logistic regression analysis, age [odds ratio (OR) 1.03; 95 % confidence interval (CI) 1.01-1.05], systolic blood pressure of <90 mmHg (OR 3.27; 95 % CI 1.13-9.45), body temperature of >39 °C (OR 4.26; 95 % CI 2.28-7.96), and procalcitonin level of >0.5 ng/dL (OR 2.03; 95 % CI 1.07-3.86) were significantly associated with bacteremia. CONCLUSION Among our adult patients with febrile UTI, age, systolic blood pressure, body temperature, and procalcitonin were significantly associated with bacteremia. We therefore suggest that these factors should be considered when deciding upon treatment options for febrile UTI patients at the ED.
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194
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Lee S, Sung K, Lee S, Ahn S, Choi J, Lee K. EP-1352: Assessment of tumor volume and serum tumor marker levels during chemoradiation therapy for cervix cancer. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)31470-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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195
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Kwak MK, Kim WY, Lee CW, Seo DW, Sohn CH, Ahn S, Lim KS, Donnino MW. The impact of saddle embolism on the major adverse event rate of patients with non-high-risk pulmonary embolism. Br J Radiol 2013; 86:20130273. [PMID: 24058095 PMCID: PMC3856545 DOI: 10.1259/bjr.20130273] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Revised: 07/22/2013] [Accepted: 09/17/2013] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE Wider application of CT angiography (CTA) improves the diagnosis of acute pulmonary embolism (PE). It also permits the visualisation of saddle embolism (SE), namely thrombi, which are located at the bifurcation of the main pulmonary artery. The aim of this study was to assess the prevalence of SE and whether SE predicts a complicated clinical course in patients with non-high-risk PE. METHODS In total, 297 consecutive patients with non-high-risk PE confirmed using CTA in the emergency department were studied. The presence of SE and its ability to predict the occurrence of major adverse events (MAEs) within 1 month were determined. RESULTS Of the 297 patients, 27 (9.1%) had an SE. The overall mortality at 1 month was 12.5%; no significant difference was observed between the SE and non-SE groups (18.5% vs 11.9%, p=0.32). However, patients with SE were more likely to receive thrombolytic therapy (29.6% vs 8.1%, p<0.01) and had significantly more MAEs (59.3% vs 25.6%, p<0.01). CONCLUSION At the time of diagnosis, SE, as determined using CTA, is associated with the development of MAE within 1 month. It may be a simple method for risk stratification of patients with non-high-risk PE. ADVANCES IN KNOWLEDGE The prognosis of patients with SE, especially those who are haemodynamically stable, is unclear. This study shows that patients with SE, determined with CTA, is associated with the development of MAE.
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196
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Ahn S, Cho K, Jeong J, Yoon M, Song J, Nam T, Ban H, Oh I, Kim K, Kim Y. Randomized, Multicenter Phase 3 Study of Accelerated Fraction With Concomitant Boost to the Gross Tumor Volume Compared With Conventional Fraction in Concurrent Chemoradiation in Patients With Unresectable Stage III Non-Small Cell Lung Cancer: KROG 0903. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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197
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Park J, Song S, Kim S, Yoon S, Park J, Kim Y, Lee S, Kim J, Ahn S, Choi E. Postoperative Radiation Therapy for Incompletely-Resected Non-Small Cell Lung Cancer. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.1377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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198
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Jung J, Yoon S, Park J, Song S, Lee S, Ahn S, Choi E, Kim J. Normalization of Alpha-Fetoprotein Level in Patients With Hepatocellular Carcinoma After Stereotactic Body Radiation Therapy: A Prognostic Surrogate of Progression and Survival. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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199
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Min SI, Ha J, Kang HG, Ahn S, Park T, Park DD, Kim SM, Hong HJ, Min SK, Ha IS, Kim SJ. Conversion of twice-daily tacrolimus to once-daily tacrolimus formulation in stable pediatric kidney transplant recipients: pharmacokinetics and efficacy. Am J Transplant 2013; 13:2191-7. [PMID: 23734831 DOI: 10.1111/ajt.12274] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Revised: 03/29/2013] [Accepted: 03/31/2013] [Indexed: 01/25/2023]
Abstract
The pharmacokinetics, efficacy and safety of once-daily tacrolimus formulation (Tac-OD) were assessed in 34 stable pediatric kidney transplant recipients. Enrolled patients received their dose of twice-daily tacrolimus formulation (Tac-BID) on study Days 0 through 7. On the morning of study Day 8, the total daily doses for patients were converted to Tac-OD on a 1:1 basis and maintained on a once-daily morning dosing regimen. Tacrolimus pharmacokinetic profiles were obtained on study Days 7, 14 and 28 (after dose adjustment). Although the mean C0 concentrations (4.10 ± 1.16-3.53 ± 1.10 ng/mL, p = 0.004), and AUC0-24 (151.8 ± 41.6-129.8 ± 39.3 ng h/mL, p < 0.001) were decreased significantly after a 1:1 based conversion, there was high interindividual variability. The dose of Tac-OD was decreased in 26.5% and increased in 44.1% of patients. The resultant tacrolimus dose and pharmacokinetic profiles on study Day 28 were comparable to those on Day 7. There were no serious adverse events. In conclusion, Tac-BID can be safely converted to Tac-OD in stable pediatric kidney transplant patients with the heightened therapeutic drug monitoring. Effects of drug conversion on the cardiovascular risk factors, neurological side effects and adherence should be further evaluated.
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Ahn S, White JL. Influence of Low Molecular Weight Additives on Die Extrusion Rheometer Flow of Thermoplastic Melts. INT POLYM PROC 2013. [DOI: 10.3139/217.1742] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
An experimental study of slippage induced in various thermoplastics in rheometers by the presence of small amount of low molecular weight additives is described. Capillary and cone-plate experiments are reported. A series of polymers of varying polarity including polyethylene, polypropylene, polystyrene, poly (methyl methacrylate) and polyamide 12 are compared. Five eighteen-carbon amphiphilic ω-compounds are used as additives including octadecanoic acid, octadecanamide, octadecanol, calcium stearate and zinc stearate. The greatest effects were found in polyethylene and polypropylene. Little or no effects are found with the other polymers. The most effective additives were octadecanoic acid and zinc stearate. Octadecanamide and octadecanol had some effectiveness. Mechanisms for this behavior are described.
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