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Lee K, Kim H, Park S, Kim D, Kim Y, Choi S, Lee G, Jeong Y, Yun J, Chong Y. MA01.05 Progress of Accompanying GGN Beyond Pulmonary Resection for Non-Small Cell Lung Cancer. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.496] [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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202
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Coppens S, Deconinck N, Phadke R, Sewry C, Kadhim H, Tay C, Bakshi M, de Silva D, Thomas N, Park S, French C, Ward M, Arens Y, Manzur A, Ravenscroft G, Laing N, Kamsteeg E, Davis M, Muntoni F, Oates E. P.241Congenital titinopathy as a cause of severe to profound congenital weakness and early death. Neuromuscul Disord 2019. [DOI: 10.1016/j.nmd.2019.06.355] [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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203
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Lee CJ, Hwang J, Kang CY, Kim H, Ha J, Chun KH, Oh J, Lee S, Kang SM, Park S, Yoo TH. P5731Optimal blood pressure in diabetic hypertensive patients with overt proteinuria. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.0671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Evidence for the benefit of intensive blood pressure lowering in diabetic nephropathy is not clear at this time. The objective of this study was to demonstrate whether lower mean blood pressure (BP) in treated hypertensive patients with diabetic nephropathy is associated with better prognosis.
Methods
From the National Health Insurance Service (NHIS) Health Examination Database, diabetic hypertensive subjects with proteinuria between 2009 and 2010 were selected and followed-up until 2015 (N=8,663). Mean of the recorded systolic and diastolic BP during follow-up health examinations were stratified into five categories (SBP: <120, 120 to <130, 130 to <140, 140 to <150, and ≥150 mmHg; DBP: <70, 70 to <80, 80 to <90, 90 to <100, and ≥100 mmHg). All-cause death, myocardial infarction (MI), stroke, and renal outcome (progression to end stage renal disease or doubling of serum creatinine) were examined by Cox proportional hazard models with the propensity scores adjusted method.
Results
Compared to SBP of 130 to <140 mmHg, SBP of 120 to <130 mmHg was associated with lower risk of all-cause death (HR=0.78; 95% CI, 0.64–0.95), stroke (HR: 0.65; 95% CI, 0.45–0.94), and renal outcome (HR: 0.81; 95% CI, 0.68–0.97). SBP of <120 mmHg was associated with benefit for renal outcomes (HR: 0.69; 95% CI 0.55–0.88) but not with elevated risk of other outcomes. Compared to DBP of 80 to <90 mmHg, DBP of 70 to <80 mmHg were associated with lower risk of all-cause death (HR: 0.75; 95% CI, 0.64–0.88) but with higher risk of MI (HR: 1.52; 95% CI, 1.05–2.21). DBP of <70 mmHg was associated with reduced risk of all-cause death (HR: 0.79; 95% CI, 0.64–0.98).
Conclusion
In diabetic hypertensive subjects with overt proteinuria, deterioration of renal function decreased with decreasing SBP and the lowest risk of all-cause death and stroke were observed in SBP <130 mmHg. Low DBP was associated with low risk of all-cause death but there was a J curve phenomenon for MI in DBP of 70 to <80 mmHg.
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Jang WY, Kim W, Kang DO, Park Y, Park EJ, Na JO, Choi CU, Rha SW, Park CG, Seo HS, Park S, Kim EJ. P4339Reference values for cardiorespiratory fitness in healthy Koreans: compared to western nations and nomogram. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz745.0748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
Cardiorespiratory Fitness (CRF), defined as the integrated ability to properly oxygenate skeletal muscles during physical activity, is associated with a high risk of cardiovascular disease and all-cause mortality. The reference range for CRF may differ among nations, with Asians under-represented in previous data.
Purpose
In this study, we sought to establish reference values of CRF for Asians using a recent Korean cohort.
Methods
We analyzed 2646 healthy Korean adults recently enrolled in the Korea Institute of Sports Science Fitness Standards (KISS FitS) project with estimated maximal oxygen uptake (VO2max) values during treadmill test. Patients with cardiovascular or renal disease, systemic infection, pregnant women and those with orthopedic injuries unable to measure physical fitness were excluded. Age-specific mean VO2max values were compared with those from recent American, Norwegian, Danish cohorts and old Korean data.
Results
Age-specific reference values for healthy Korean adults in this cohort were as shown (Table). We were able to draw a nomogram to predict exercise capacity for a given age and MET value (Figure). When compared to other countries, less CRF reduction by aging was seen in Asians than in other Westerners. When compared to old Korean data from the 1980s, values were similar after adjustment for difference in methods, except for those under 30 years old which were decreased.
Exercise capacity of healthy Korean Men Women Age VO2max (ml/kg/min) N P-value for trend Age VO2max (ml/kg/min) N P-value for trend 19–29 42.3±6.3± 209 <0.01 19–29 34.3±4.3± 110 <0.01 30–39 42.0±5.0± 170 39–39 32.2±4.5± 211 40–49 41.4±5.6± 238 40–49 30.8±4.6± 284 50–59 38.0±5.7± 274 50–59 28.3±4.6± 367 60–69 32.4±6.2± 134 60–69 26.0±5.7± 336 70–79 27.2±5.6± 83 70–79 23.9±4.4± 195 >80 24.1±4.0± 11 >80 21.0±3.7± 24 Total 38.6±7.4± 1119 Total 28.5±5.8 1527 Data are presented as mean ± standard deviation. VO2max, maximal oxygen uptake; N, number.
Nomogram of exercise capacity in Koreans
Conclusions
While there was no significant change in CRF over time in the same ethnic group, there was a clear inter-ethnic difference. CRF should be assessed according to ethnic or national standards, and it is necessary to establish a reference for each nation or ethnicity with periodic updates.
Acknowledgement/Funding
National Sports Promotion Fund of the Korea Sports Promotion Foundation in 2015
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Park S, Belcastro E, Hasan H, Bruckert C, Marchandot B, Kibler M, Toti F, Auger C, Jesel L, Ohlmann P, Morel O, Schini-Kerth V. P6266Circulating microparticules of patients with coronary artery disease up-regulate the expression of sodium-glucose cotransporters 1 and 2 in coronary artery endothelial cells: role of angiotensin II. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.0865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
Circulating microparticles (MPs) from patients with coronary artery diseases (CAD) have been shown to promote endothelial senescence and dysfunction involving the pro-oxidant local angiotensin system. Sodium-glucose cotransporters (SGLTs)2 inhibitors decreased the risk of cardiovascular disease in patients with type 2 diabetes and this effect appears to be independent of glycemic control. Moreover, high glucose and H2O2 have been shown to cause a redox-sensitive upregulation of SGLT1 and 2 in coronary artery endothelial cells (ECs).
Aim
Therefore, this study examined whether angiotensin II (Ang II, a potent NADPH oxidase-dependent inducer of oxidative stress) and CAD MPs stimulate SGLT1 and 2 expression in ECs, and assessed their role in the induction of endothelial dysfunction.
Methods
ECs were isolated from porcine coronary arteries. The protein expression level was assessed by Western blot analysis and immunocytochemical staining, oxidative stress using dihydroethidium staining, and senescence by senescence-associated beta-galactosidase activity (SA-beta-gal activity). Circulating CAD MPs were collected from blood samples of patients (61–79 year) with established cardiovascular disease.
Results
Control ECs expressed low levels of SGLT1 and SGLT2 proteins. Exposure of ECs to Ang II caused a time- and concentration-dependent increase in the protein level of SGLT1 and SGLT2 with a significant increase observed at concentrations as low as 10 nM. Exposure of ECs to CAD MPs (10 nM PhtdSer eq) from 3/5 patients increased the SGLT1 and SGLT2 protein level. An increased SGLT1 and SGLT2 immunofluorescence signal was also observed in response to Ang II and H2O2. Ang II increased the level of oxidative stress, SA-beta-gal activity, senescence markers (p53, p21 and p16), VCAM-1, MCP-1, tissue factor (TF) and the local angiotensin system (ACE, AT1R), and down-regulated that of eNOS. CAD MPs from 4/5 patients decreased eNOS level and from 5/5 patients increased VCAM-1 level. All the Ang II-induced effects were prevented by the dual SGLT1/2 inhibitor LX-4211 and the selective SGLT2 inhibitor, empagliflozin.
Conclusions
The present findings indicate that CAD MPs and Ang II upregulate the expression of SGLT1 and SGLT2 protein levels in ECs, and that they promote endothelial dysfunction. They further suggest that inhibition of SGLT1 and/or SGLT2 might be an attractive strategy to protect the arterial wall and, hence, the development of cardiovascular diseases.
Acknowledgement/Funding
Unrestricted research grant from Boehringer Ingelheim Pharma GmbH & Co. KG
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Chong Y, Yun J, Jeong Y, Lee G, Choi S, Kim H, Kim Y, Park S, Kim D. P2.17-09 Preoperative Risk Factors of Potential Failure for Lobe-Specific Nodal Dissection in Clinical Early Stage (I-IIA) Non-Small Cell Lung Cancer. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1920] [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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Ashraf S, Kim BJ, Park S, Park H, Lee SH. RHEB gene therapy maintains the chondrogenic characteristics and protects cartilage tissue from degenerative damage during experimental murine osteoarthritis. Osteoarthritis Cartilage 2019; 27:1508-1517. [PMID: 31229684 DOI: 10.1016/j.joca.2019.05.024] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 05/20/2019] [Accepted: 05/24/2019] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Osteoarthritis (OA) is characterized by cartilage degeneration resulting from hypertrophic changes in chondrocytes caused by altered gene expression. The involvement of Ras homolog enriched in brain (RHEB) in OA regulation is unclear. METHODS Human knee articular cartilage samples - were analyzed for structural and biological changes by histology, immunohistochemistry, real time PCR and western blotting. OA-mouse model developed by surgical destabilization of the medial meniscus (DMM) were treated with adenovirus harboring Rheb gene to analyze onset and progression of OA. Histological scoring, immunohistochemistry, and TUNEL assay was performed to assess cartilage damage across the entire joint. RESULTS Human and mouse OA cartilage is degenerated and has markedly reduced levels of RHEB. Human OA-degenerated chondrocytes (DC) exhibited a fibroblastic phenotype and 80 % of degenerative cartilage were senescent, with higher levels of reactive oxygen species (ROS). Gene expression analysis of DC revealed almost no COL2A1 expression and reduced SOX9 and RHEB expression. Transient transfection of RHEB rescued the DC phenotype and reduced senescence and ROS levels markedly. RHEB overexpression also increased COL2A1 and SOX9 expression. In an OA-mouse model, the Rheb protein level decreased as the severity of OA increased. Ectopic expression of Rheb using adenovirus in mouse-OA cartilage suppressed surgically-induced OA pathogenesis accompanied by modulation of Adamts5, Mmp 13, Col 10, and Col2a1 expression. Rheb induction significantly reduced apoptosis in OA-cartilage. CONCLUSION RHEB plays an important role in maintaining the chondrogenic characteristics of chondrocytes, and has potential in preventing progression of OA in the destabilize the medial meniscus (DMM) mouse model of OA.
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Yun J, Lee G, Chong Y, Jeong Y, Choi S, Kim H, Kim Y, Kim D, Park S. MA02.10 Different Prognostic Impact of Lymphovascular Invasion Between Lobectomy and Sublobar Resection in Stage IA Non-Small Cell Lung Cancer: A Propensity Score–Matched Analysis. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.509] [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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Abdou Y, Baird A, Dolan J, Lee S, Park S, Lee S. Machine learning-assisted prognostication based on genomic expression in the tumour microenvironment of estrogen receptor positive and HER2 negative breast cancer. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz240.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Stebbing J, Baranau Y, Baryash V, Manikhas A, Moiseyenko V, Dzagnidze G, Zhavrid E, Boliukh D, Stroyakovskiy D, Pikiel J, Eniu A, Komov D, Lee S, Kim M, Kim S, Park S, Bae J, Esteva F. 3-year follow-up of a phase III trial comparing the efficacy and safety of neoadjuvant and adjuvant trastuzumab and its biosimilar CT-P6 in HER2 positive early breast cancer (EBC). Ann Oncol 2019. [DOI: 10.1093/annonc/mdz240.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Ahn M, Park S, Hong S, Park J, Park M, Jung H, Sun J, Lee S, Ahn J, Park K. MA21.10 Phase II Study of 160mg of Osimertinib in EGFR T790M Positive NSCLC with Brain or Leptomeningeal Metastases Who Progressed on Prior EGFR TKI. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.680] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Cho Y, Choi S, Yoon Y, Park S, Lee E, Kim J, Park JH, Ahn S. 370 The Impact of Oxygen and Pentoxifylline in Hypoxic State. Ann Emerg Med 2019. [DOI: 10.1016/j.annemergmed.2019.08.331] [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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213
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Ahn H, Hyun S, Park S, Lee S, Kim J, Ahn J, Im YH, Park Y. Metabolic tumour volume by 18F-FDG PET/CT is an independent prognostic factor in metastatic breast cancer. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz242.064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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214
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Park S, Bae S. Prognosis of mastectomy with reconstruction after neoadjuvant chemotherapy: A nationwide study of the Korean Breast Cancer Society. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz240.045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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215
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Park H, Shin DY, Kim I, Sohn SK, Koh Y, Lee JH, Lee KH, Kim DY, Kim HJ, Ahn JS, Lee JO, Bang SM, Cheong JW, Park SG, Park S, Lee Y, Ahn SY. Use of droplet digital polymerase chain reaction for detecting minimal residual disease: A prospective, multi-institutional study. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz251.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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216
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Park S, Baek SS, Pyo J, Pachepsky Y, Park J, Cho KH. Deep neural networks for modeling fouling growth and flux decline during NF/RO membrane filtration. J Memb Sci 2019. [DOI: 10.1016/j.memsci.2019.06.004] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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217
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Kim WY, Kang BJ, Chung CR, Park SH, Oh JY, Park SY, Cho WH, Sim YS, Cho YJ, Park S, Kim JH, Hong SB. Prone positioning before extracorporeal membrane oxygenation for severe acute respiratory distress syndrome: A retrospective multicenter study. Med Intensiva 2019; 43:402-409. [PMID: 29983197 PMCID: PMC10036879 DOI: 10.1016/j.medin.2018.04.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2018] [Revised: 04/05/2018] [Accepted: 04/29/2018] [Indexed: 11/21/2022]
Abstract
OBJECTIVE To evaluate the clinical outcomes of patients with severe acute respiratory distress syndrome (ARDS) subjected to prone positioning before extracorporeal membrane oxygenation (ECMO). DESIGN A retrospective analysis of a multicenter cohort was carried out. SETTING Patients admitted to the Intensive Care Units of 11 hospitals in Korea. PATIENTS Patients were divided into those who underwent prone positioning before ECMO (n=28) and those who did not (n=34). INTERVENTIONS None. VARIABLES OF INTEREST Thirty-day mortality, ECMO weaning failure rate, mechanical ventilation weaning success rate, mechanical ventilation-free days at day 60. RESULTS The prone group had lower median peak inspiratory pressure and lower median dynamic driving pressure before ECMO. Thirty-day mortality was 21% in the prone group and 41% in the non-prone group (p=0.098). The prone group also showed a lower ECMO weaning failure rate, and a higher mechanical ventilation weaning success rate and more mechanical ventilation-free days at day 60. In the non-prone group, median dynamic compliance marginally decreased shortly after ECMO, but no significant change was observed in the prone group. CONCLUSIONS Prone positioning before ECMO was not associated to increased mortality and tended to exert a protective effect.
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Aidala C, Akiba Y, Alfred M, Andrieux V, Apadula N, Asano H, Azmoun B, Babintsev V, Bandara NS, Barish KN, Bathe S, Bazilevsky A, Beaumier M, Belmont R, Berdnikov A, Berdnikov Y, Blau DS, Bok JS, Brooks ML, Bryslawskyj J, Bumazhnov V, Campbell S, Canoa Roman V, Cervantes R, Chi CY, Chiu M, Choi IJ, Choi JB, Citron Z, Connors M, Cronin N, Csanád M, Csörgő T, Danley TW, Daugherity MS, David G, DeBlasio K, Dehmelt K, Denisov A, Deshpande A, Desmond EJ, Dion A, Dixit D, Do JH, Drees A, Drees KA, Durham JM, Durum A, Enokizono A, En'yo H, Esumi S, Fadem B, Fan W, Feege N, Fields DE, Finger M, Finger M, Fokin SL, Frantz JE, Franz A, Frawley AD, Fukuda Y, Gal C, Gallus P, Gamez EA, Garg P, Ge H, Giordano F, Goto Y, Grau N, Greene SV, Grosse Perdekamp M, Gunji T, Guragain H, Hachiya T, Haggerty JS, Hahn KI, Hamagaki H, Hamilton HF, Han SY, Hanks J, Hasegawa S, Haseler TOS, He X, Hemmick TK, Hill JC, Hill K, Hodges A, Hollis RS, Homma K, Hong B, Hoshino T, Hotvedt N, Huang J, Huang S, Imai K, Inaba M, Iordanova A, Isenhower D, Ishimaru S, Ivanishchev D, Jacak BV, Jezghani M, Ji Z, Jiang X, Johnson BM, Jouan D, Jumper DS, Kang JH, Kapukchyan D, Karthas S, Kawall D, Kazantsev AV, Khachatryan V, Khanzadeev A, Kim C, Kim EJ, Kim M, Kincses D, Kistenev E, Klatsky J, Kline P, Koblesky T, Kotov D, Kudo S, Kurgyis B, Kurita K, Kwon Y, Lajoie JG, Lebedev A, Lee S, Lee SH, Leitch MJ, Leung YH, Lewis NA, Li X, Lim SH, Liu MX, Loggins VR, Lökös S, Lovasz K, Lynch D, Majoros T, Makdisi YI, Makek M, Manko VI, Mannel E, McCumber M, McGaughey PL, McGlinchey D, McKinney C, Mendoza M, Metzger WJ, Mignerey AC, Milov A, Mishra DK, Mitchell JT, Mitrankov I, Mitsuka G, Miyasaka S, Mizuno S, Montuenga P, Moon T, Morrison DP, Morrow SI, Murakami T, Murata J, Nagai K, Nagashima K, Nagashima T, Nagle JL, Nagy MI, Nakagawa I, Nakano K, Nattrass C, Nelson S, Niida T, Nishitani R, Nouicer R, Novák T, Novitzky N, Nyanin AS, O'Brien E, Ogilvie CA, Orjuela Koop JD, Osborn JD, Oskarsson A, Ottino GJ, Ozawa K, Pantuev V, Papavassiliou V, Park JS, Park S, Pate SF, Patel M, Peng W, Perepelitsa DV, Perera GDN, Peressounko DY, PerezLara CE, Perry J, Petti R, Phipps M, Pinkenburg C, Pisani RP, Pun A, Purschke ML, Radzevich PV, Read KF, Reynolds D, Riabov V, Riabov Y, Richford D, Rinn T, Rolnick SD, Rosati M, Rowan Z, Runchey J, Safonov AS, Sakaguchi T, Sako H, Samsonov V, Sarsour M, Sato S, Scarlett CY, Schaefer B, Schmoll BK, Sedgwick K, Seidl R, Sen A, Seto R, Sexton A, Sharma D, Shein I, Shibata TA, Shigaki K, Shimomura M, Shioya T, Shukla P, Sickles A, Silva CL, Silvermyr D, Singh BK, Singh CP, Singh V, Skoby MJ, Slunečka M, Smith KL, Snowball M, Soltz RA, Sondheim WE, Sorensen SP, Sourikova IV, Stankus PW, Stoll SP, Sugitate T, Sukhanov A, Sumita T, Sun J, Sun Z, Suzuki S, Sziklai J, Tanida K, Tannenbaum MJ, Tarafdar S, Taranenko A, Tarnai G, Tieulent R, Timilsina A, Todoroki T, Tomášek M, Towell CL, Towell RS, Tserruya I, Ueda Y, Ujvari B, van Hecke HW, Velkovska J, Virius M, Vrba V, Vukman N, Wang XR, Wang Z, Watanabe YS, Wong CP, Woody CL, Xu C, Xu Q, Xue L, Yalcin S, Yamaguchi YL, Yamamoto H, Yanovich A, Yoo JH, Yoon I, Yu H, Yushmanov IE, Zajc WA, Zelenski A, Zhai Y, Zharko S, Zou L. Nuclear Dependence of the Transverse Single-Spin Asymmetry in the Production of Charged Hadrons at Forward Rapidity in Polarized p+p, p+Al, and p+Au Collisions at sqrt[s_{NN}]=200 GeV. PHYSICAL REVIEW LETTERS 2019; 123:122001. [PMID: 31633981 DOI: 10.1103/physrevlett.123.122001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 07/02/2019] [Indexed: 06/10/2023]
Abstract
We report on the nuclear dependence of transverse single-spin asymmetries (TSSAs) in the production of positively charged hadrons in polarized p^{↑}+p, p^{↑}+Al, and p^{↑}+Au collisions at sqrt[s_{NN}]=200 GeV. The measurements have been performed at forward rapidity (1.4<η<2.4) over the range of transverse momentum (1.8<p_{T}<7.0 GeV/c) and Feynman x (0.1<x_{F}<0.2). We observed positive asymmetries for positively charged hadrons in p^{↑}+p collisions, and significantly reduced asymmetries in p^{↑}+A collisions. These results reveal a nuclear dependence of TSSAs for charged-hadron production in a regime where perturbative techniques are applicable. These results provide new opportunities to use p^{↑}+A collisions as a tool to investigate the rich phenomena behind TSSAs in hadronic collisions and to use TSSAs as a new handle in studying small-system collisions.
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Park S, Byun H, Seong J. Treatment-Related Lymphopenia after Radiotherapy for Bone Metastasis from Hepatocellular Carcinoma. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.1176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Sohn C, Yu T, Lee M, Park S, Kim J, Han G, Na W. Medical Nutrition Therapy is associated with Decreased Inflammation in Diabetes Patients: A Randomized Controlled Trial. J Acad Nutr Diet 2019. [DOI: 10.1016/j.jand.2019.06.102] [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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Lim L, Cho Y, Lee HC, Choi EK, Park S, Yu J, Nam K, Kim T, Jeon Y. The attenuated effect of remote ischemic conditioning on tissue oxygen saturation and heart rate variability in the patient undergoing cardiac surgery: a pilot study. J Cardiothorac Vasc Anesth 2019. [DOI: 10.1053/j.jvca.2019.07.055] [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: 11/11/2022]
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Byun H, Kim N, Park S, Seong J. Radiotherapy-Related Lymphopenia in Patients with Hepatocellular Carcinoma. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.1997] [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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Kim G, Cho S, Kim S, Oh M, Han J, Park S, Seo B, An S. 147 Comparison of in vivo and in vitro tests to predict the irritation potential of surfactants and cleansing formulation. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.07.151] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Park J, Dall'Osto M, Park K, Kim JH, Park J, Park KT, Hwang CY, Jang GI, Gim Y, Kang S, Park S, Jin YK, Yum SS, Simó R, Yoon YJ. Arctic Primary Aerosol Production Strongly Influenced by Riverine Organic Matter. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:8621-8630. [PMID: 31310508 DOI: 10.1021/acs.est.9b03399] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The sources of primary and secondary aerosols in the Arctic are still poorly known. A number of surface seawater samples-with varying degrees of Arctic riverine and sea ice influences-were used in a sea spray generation chamber to test them for their potential to produce sea spray aerosols (SSA) and cloud condensation nuclei (CCN). Our interdisciplinary data showed that both sea salt and organic matter (OM) significantly influenced the SSA production. The number concentration of SSA in the coastal samples was negatively correlated with salinity and positively correlated with a number of OM tracers, including dissolved and chromophoric organic carbon (DOC, CDOM), marine microgels and chlorophyll a (Chl-a) but not for viral and bacterial abundances; indicating that OM of riverine origin enhances primary aerosol production. When all samples were considered, transparent exopolymer particles (TEP) were found to be the best indicator correlating positively with the ratio number concentration of SSA/salinity. CCN efficiency was not observed to differ between the SSA from the various samples, despite differences in organic characteristics. It is suggested that the large amount of freshwater from river runoff have a substantial impact on primary aerosols production mechanisms, possibly affecting the cloud radiative forcing.
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Baek S, Park S, Kim C. Bltr1 In Monocytes Mediates Monocyte-To-Macrophage Differentiation Leading To Vascular Inflammation In The Injured Vasculatures. Atherosclerosis 2019. [DOI: 10.1016/j.atherosclerosis.2019.06.766] [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: 10/26/2022]
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Choi J, Baek S, Jang E, Park S, Kim C. Hmgb1 Increases 5-Lo-Derived Ltb4 Production Leading To An Increased Mcp-1 Expression In Vascular Smooth Muscle Cells. Atherosclerosis 2019. [DOI: 10.1016/j.atherosclerosis.2019.06.800] [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: 10/26/2022]
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Park S, Chu LC, Fishman EK, Yuille AL, Vogelstein B, Kinzler KW, Horton KM, Hruban RH, Zinreich ES, Fouladi DF, Shayesteh S, Graves J, Kawamoto S. Annotated normal CT data of the abdomen for deep learning: Challenges and strategies for implementation. Diagn Interv Imaging 2019; 101:35-44. [PMID: 31358460 DOI: 10.1016/j.diii.2019.05.008] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 05/23/2019] [Accepted: 05/28/2019] [Indexed: 02/08/2023]
Abstract
PURPOSE The purpose of this study was to report procedures developed to annotate abdominal computed tomography (CT) images from subjects without pancreatic disease that will be used as the input for deep convolutional neural networks (DNN) for development of deep learning algorithms for automatic recognition of a normal pancreas. MATERIALS AND METHODS Dual-phase contrast-enhanced volumetric CT acquired from 2005 to 2009 from potential kidney donors were retrospectively assessed. Four trained human annotators manually and sequentially annotated 22 structures in each datasets, then expert radiologists confirmed the annotation. For efficient annotation and data management, a commercial software package that supports three-dimensional segmentation was used. RESULTS A total of 1150 dual-phase CT datasets from 575 subjects were annotated. There were 229 men and 346 women (mean age: 45±12years; range: 18-79years). The mean intra-observer intra-subject dual-phase CT volume difference of all annotated structures was 4.27mL (7.65%). The deep network prediction for multi-organ segmentation showed high fidelity with 89.4% and 1.29mm in terms of mean Dice similarity coefficients and mean surface distances, respectively. CONCLUSIONS A reliable data collection/annotation process for abdominal structures was developed. This process can be used to generate large datasets appropriate for deep learning.
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Adare A, Afanasiev S, Aidala C, Ajitanand NN, Akiba Y, Akimoto R, Al-Bataineh H, Alexander J, Alfred M, Al-Jamel A, Al-Ta'ani H, Angerami A, Aoki K, Apadula N, Aphecetche L, Aramaki Y, Armendariz R, Aronson SH, Asai J, Asano H, Aschenauer EC, Atomssa ET, Averbeck R, Awes TC, Azmoun B, Babintsev V, Bagoly A, Bai M, Baksay G, Baksay L, Baldisseri A, Bannier B, Barish KN, Barnes PD, Bassalleck B, Basye AT, Bathe S, Batsouli S, Baublis V, Bauer F, Baumann C, Baumgart S, Bazilevsky A, Belikov S, Belmont R, Bennett R, Berdnikov A, Berdnikov Y, Bhom JH, Bickley AA, Bjorndal MT, Blau DS, Boer M, Boissevain JG, Bok JS, Borel H, Boyle K, Brooks ML, Brown DS, Bryslawskyj J, Bucher D, Buesching H, Bumazhnov V, Bunce G, Burward-Hoy JM, Butsyk S, Camacho CM, Campbell S, Canoa Roman V, Caringi A, Castera P, Chai JS, Chang BS, Chang WC, Charvet JL, Chen CH, Chernichenko S, Chi CY, Chiba J, Chiu M, Choi IJ, Choi JB, Choi S, Choudhury RK, Christiansen P, Chujo T, Chung P, Churyn A, Chvala O, Cianciolo V, Citron Z, Cleven CR, Cobigo Y, Cole BA, Comets MP, Conesa Del Valle Z, Connors M, Constantin P, Csanád M, Csörgő T, Dahms T, Dairaku S, Danchev I, Danley TW, Das K, Datta A, Daugherity MS, David G, Dayananda MK, Deaton MB, Dehmelt K, Delagrange H, Denisov A, d'Enterria D, Deshpande A, Desmond EJ, Dharmawardane KV, Dietzsch O, Ding L, Dion A, Do JH, Donadelli M, D'Orazio L, Drachenberg JL, Drapier O, Drees A, Drees KA, Dubey AK, Durham JM, Durum A, Dutta D, Dzhordzhadze V, Edwards S, Efremenko YV, Egdemir J, Ellinghaus F, Emam WS, Engelmore T, Enokizono A, En'yo H, Espagnon B, Esumi S, Eyser KO, Fadem B, Fan W, Feege N, Fields DE, Finger M, Finger M, Fleuret F, Fokin SL, Forestier B, Fraenkel Z, Frantz JE, Franz A, Frawley AD, Fujiwara K, Fukao Y, Fung SY, Fusayasu T, Gadrat S, Gainey K, Gal C, Gallus P, Garg P, Garishvili A, Garishvili I, Gastineau F, Ge H, Germain M, Glenn A, Gong H, Gong X, Gonin M, Gosset J, Goto Y, Granier de Cassagnac R, Grau N, Greene SV, Grim G, Grosse Perdekamp M, Gunji T, Guo L, Gustafsson HÅ, Hachiya T, Hadj Henni A, Haegemann C, Haggerty JS, Hagiwara MN, Hahn KI, Hamagaki H, Hamblen J, Han R, Hanks J, Harada H, Hartouni EP, Haruna K, Harvey M, Hasegawa S, Haseler TOS, Hashimoto K, Haslum E, Hasuko K, Hayano R, He X, Heffner M, Hemmick TK, Hester T, Heuser JM, Hiejima H, Hill JC, Hill K, Hobbs R, Hodges A, Hohlmann M, Hollis RS, Holmes M, Holzmann W, Homma K, Hong B, Horaguchi T, Hori Y, Hornback D, Hotvedt N, Huang J, Huang S, Hur MG, Ichihara T, Ichimiya R, Iinuma H, Ikeda Y, Imai K, Imrek J, Inaba M, Inoue Y, Iordanova A, Isenhower D, Isenhower L, Ishihara M, Isobe T, Issah M, Isupov A, Ivanishchev D, Iwanaga Y, Jacak BV, Javani M, Ji Z, Jia J, Jiang X, Jin J, Jinnouchi O, Johnson BM, Jones T, Joo KS, Jouan D, Jumper DS, Kajihara F, Kametani S, Kamihara N, Kamin J, Kaneta M, Kaneti S, Kang BH, Kang JH, Kang JS, Kanou H, Kapustinsky J, Karatsu K, Kasai M, Kawagishi T, Kawall D, Kawashima M, Kazantsev AV, Kelly S, Kempel T, Khachatryan V, Khanzadeev A, Kijima KM, Kikuchi J, Kim A, Kim BI, Kim C, Kim DH, Kim DJ, Kim E, Kim EJ, Kim HJ, Kim KB, Kim M, Kim SH, Kim YJ, Kim YK, Kim YS, Kincses D, Kinney E, Kiriluk K, Kiss Á, Kistenev E, Kiyomichi A, Klatsky J, Klay J, Klein-Boesing C, Kleinjan D, Kline P, Kochenda L, Kochetkov V, Komatsu Y, Komkov B, Konno M, Koster J, Kotchetkov D, Kotov D, Kozlov A, Král A, Kravitz A, Krizek F, Kroon PJ, Kubart J, Kunde GJ, Kurgyis B, Kurihara N, Kurita K, Kurosawa M, Kweon MJ, Kwon Y, Kyle GS, Lacey R, Lai YS, Lajoie JG, Layton D, Lebedev A, Le Bornec Y, Leckey S, Lee B, Lee DM, Lee J, Lee KB, Lee KS, Lee MK, Lee SH, Lee SR, Lee T, Leitch MJ, Leite MAL, Leitgab M, Lenzi B, Leung YH, Lewis B, Lewis NA, Li X, Li X, Li XH, Lichtenwalner P, Liebing P, Lim H, Lim SH, Linden Levy LA, Liška T, Litvinenko A, Liu H, Liu MX, Lökös S, Love B, Lynch D, Maguire CF, Majoros T, Makdisi YI, Makek M, Malakhov A, Malik MD, Manion A, Manko VI, Mannel E, Mao Y, Mašek L, Masui H, Masumoto S, Matathias F, McCain MC, McCumber M, McGaughey PL, McGlinchey D, McKinney C, Means N, Mendoza M, Meredith B, Miake Y, Mibe T, Mignerey AC, Mihalik DE, Mikeš P, Miki K, Miller TE, Milov A, Mioduszewski S, Mishra DK, Mishra GC, Mishra M, Mitchell JT, Mitrovski M, Mitsuka G, Miyachi Y, Miyasaka S, Mohanty AK, Mohapatra S, Moon HJ, Moon T, Morino Y, Morreale A, Morrison DP, Morrow SI, Moss JM, Motschwiller S, Moukhanova TV, Mukhopadhyay D, Murakami T, Murata J, Mwai A, Nagae T, Nagamiya S, Nagashima K, Nagata Y, Nagle JL, Naglis M, Nagy MI, Nakagawa I, Nakamiya Y, Nakamura KR, Nakamura T, Nakano K, Nam S, Nattrass C, Nederlof A, Newby J, Nguyen M, Nihashi M, Niida T, Norman BE, Nouicer R, Novák T, Novitzky N, Nyanin AS, Nystrand J, Oakley C, O'Brien E, Oda SX, Ogilvie CA, Ohnishi H, Ojha ID, Oka M, Okada K, Omiwade OO, Onuki Y, Orjuela Koop JD, Osborn JD, Oskarsson A, Otterlund I, Ouchida M, Ozawa K, Pak R, Pal D, Palounek APT, Pantuev V, Papavassiliou V, Park BH, Park IH, Park J, Park S, Park SK, Park WJ, Pate SF, Patel L, Patel M, Pei H, Peng JC, Peng W, Pereira H, Perepelitsa DV, Peresedov V, Peressounko DY, PerezLara CE, Petti R, Pinkenburg C, Pisani RP, Proissl M, Purschke ML, Purwar AK, Qu H, Radzevich PV, Rak J, Rakotozafindrabe A, Ravinovich I, Read KF, Rembeczki S, Reuter M, Reygers K, Reynolds D, Riabov V, Riabov Y, Richardson E, Richford D, Rinn T, Roach D, Roche G, Rolnick SD, Romana A, Rosati M, Rosen CA, Rosendahl SSE, Rosnet P, Rowan Z, Rukoyatkin P, Runchey J, Ružička P, Rykov VL, Ryu SS, Sahlmueller B, Saito N, Sakaguchi T, Sakai S, Sakashita K, Sakata H, Sako H, Samsonov V, Sano M, Sano S, Sarsour M, Sato HD, Sato S, Sato T, Sawada S, Schmoll BK, Sedgwick K, Seele J, Seidl R, Semenov AY, Semenov V, Sen A, Seto R, Sharma D, Shea TK, Shein I, Shevel A, Shibata TA, Shigaki K, Shimomura M, Shohjoh T, Shoji K, Shukla P, Sickles A, Silva CL, Silvermyr D, Silvestre C, Sim KS, Singh BK, Singh CP, Singh V, Skoby MJ, Skutnik S, Slunečka M, Smith WC, Soldatov A, Soltz RA, Sondheim WE, Sorensen SP, Sourikova IV, Staley F, Stankus PW, Stenlund E, Stepanov M, Ster A, Stoll SP, Sugitate T, Suire C, Sukhanov A, Sullivan JP, Sun J, Sun Z, Sziklai J, Tabaru T, Takagi S, Takagui EM, Takahara A, Taketani A, Tanabe R, Tanaka KH, Tanaka Y, Taneja S, Tanida K, Tannenbaum MJ, Tarafdar S, Taranenko A, Tarján P, Tennant E, Themann H, Thomas D, Thomas TL, Tieulent R, Todoroki T, Togawa M, Toia A, Tojo J, Tomášek L, Tomášek M, Tomita Y, Torii H, Towell RS, Tram VN, Tserruya I, Tsuchimoto Y, Tsuji T, Tuli SK, Tydesjö H, Tyurin N, Ueda Y, Ujvari B, Vale C, Valle H, van Hecke HW, Vargyas M, Vazquez-Zambrano E, Veicht A, Velkovska J, Vértesi R, Vinogradov AA, Virius M, Vossen A, Vrba V, Vznuzdaev E, Wagner M, Walker D, Wang XR, Watanabe D, Watanabe K, Watanabe Y, Watanabe YS, Wei F, Wei R, Wessels J, White SN, Willis N, Winter D, Wolin S, Wong CP, Woody CL, Wright RM, Wysocki M, Xia B, Xie W, Xu C, Xu Q, Yamaguchi YL, Yamaura K, Yang R, Yanovich A, Yasin Z, Ying J, Yokkaichi S, Yoo JH, You Z, Young GR, Younus I, Yu H, Yushmanov IE, Zajc WA, Zaudtke O, Zelenski A, Zhang C, Zharko S, Zhou S, Zimamyi J, Zolin L, Zou L. Beam Energy and Centrality Dependence of Direct-Photon Emission from Ultrarelativistic Heavy-Ion Collisions. PHYSICAL REVIEW LETTERS 2019; 123:022301. [PMID: 31386493 DOI: 10.1103/physrevlett.123.022301] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 04/27/2019] [Indexed: 06/10/2023]
Abstract
The PHENIX collaboration presents first measurements of low-momentum (0.4<p_{T}<3 GeV/c) direct-photon yields from Au+Au collisions at sqrt[s_{NN}]=39 and 62.4 GeV. For both beam energies the direct-photon yields are substantially enhanced with respect to expectations from prompt processes, similar to the yields observed in Au+Au collisions at sqrt[s_{NN}]=200. Analyzing the photon yield as a function of the experimental observable dN_{ch}/dη reveals that the low-momentum (>1 GeV/c) direct-photon yield dN_{γ}^{dir}/dη is a smooth function of dN_{ch}/dη and can be well described as proportional to (dN_{ch}/dη)^{α} with α≈1.25. This scaling behavior holds for a wide range of beam energies at the Relativistic Heavy Ion Collider and the Large Hadron Collider, for centrality selected samples, as well as for different A+A collision systems. At a given beam energy, the scaling also holds for high p_{T} (>5 GeV/c), but when results from different collision energies are compared, an additional sqrt[s_{NN}]-dependent multiplicative factor is needed to describe the integrated-direct-photon yield.
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Kang Y, Chin K, Chung H, Kadowaki S, Oh S, Nakayama N, Lee K, Hara H, Chung I, Tsuda M, Park S, Hosaka H, Hironaka S, Miyata Y, Ryu M, Takeuchi M, Baba H, Hyodo I, Bang Y, Boku N. A phase III study of TAS-118 plus oxaliplatin versus S-1 plus cisplatin as first-line chemotherapy in patients with advanced gastric cancer (SOLAR study). Ann Oncol 2019. [DOI: 10.1093/annonc/mdz183.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Im H, Kim J, Park S. Simple endoscopic scoring system for patients with rectal cancer after concurrent chemoradiation therapy. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz155.163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Choi C, Kang D, Kim H, Park S, Kim S, Nam H. Clinical outcomes of rectal neuroendocrine tumors less than 20 mm: a single institutional analysis of 371 patients. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz156.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Choi C, Kim S, Kang D, Park S, Nam H. Can an undifferentiated type early gastric cancer be a candidate for endoscopic resection? Ann Oncol 2019. [DOI: 10.1093/annonc/mdz155.066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Jeong SM, Kwon H, Park S, Yu SJ, Jeong HY, Nam KW, Kwon HM, Park JH. Favorable impact of non-alcoholic fatty liver disease on the cerebral white matter hyperintensity in a neurologically healthy population. Eur J Neurol 2019; 26:1471-1478. [PMID: 31233672 DOI: 10.1111/ene.14029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Accepted: 06/18/2019] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND PURPOSE Although non-alcoholic fatty liver disease (NAFLD) shares common cardiovascular risk factors with cerebral white matter hyperintensity (WMH), few studies have reported the association between NAFLD and WMH. The association between the presence of NAFLD with its severity and the volume of WMH was investigated. METHODS This cross-sectional study was conducted for 2460 subjects who voluntarily participated in health screening check-ups including brain magnetic resonance imaging and liver ultrasonography at the Health Promotion Center at Seoul National University Hospital from 2009 to 2013. Ultrasonography was used to detect the presence and severity of NAFLD combined with the NAFLD fibrosis score and the FIB-4 index. The volume of WMH was measured using a semi-automated quantification method by a trained neurologist. RESULTS The prevalence of NAFLD was 36.5%, and the median volume of WMH in all the subjects was 1.1 ml (interquartile range 0.2-2.7 ml). The presence of NAFLD was associated with a smaller volume of WMH [β (standard error, SE) -0.051 (0.046); P = 0.012]. Moderate to severe NAFLD was associated with a smaller volume of WMH than was non-NAFLD [β (SE) -0.067 (0.061); P = 0.002]. The negative correlation observed between NAFLD severity and WMH volume was persistent only in those with low FIB-4 index and low NAFLD fibrosis scores, whereas there was a positive association in those with high FIB-4 index and NAFLD fibrosis scores. CONCLUSIONS Non-alcoholic fatty liver disease, and its severity, showed a favorable association with WMH volume. However, its causality and mechanism should be evaluated in further relevantly designed studies.
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Bond D, Switchenko J, Maddocks K, Churnetski M, Goyal S, Shanmugasundaram K, Calzada O, Kolla B, Bachanova V, Gerson J, Barta S, Hill B, Salwaha Y, Martin P, Maldonado E, Gordon M, Danilov A, Grover N, Mathews S, Burkart M, Karmali R, Ghosh N, Park S, Epperla N, Badar T, Guo J, Hamadani M, Fenske T, Malecek M, Kahl B, Flowers C, Blum K, Cohen J. OUTCOMES FOR PATIENTS WITH MANTLE CELL LYMPHOMA EXPERIENCING FRONTLINE TREATMENT FAILURE: A MULTICENTER RETROSPECTIVE STUDY. Hematol Oncol 2019. [DOI: 10.1002/hon.77_2631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Rigby M, Park S, Saito T, Western LM, Redington AL, Fang X, Henne S, Manning AJ, Prinn RG, Dutton GS, Fraser PJ, Ganesan AL, Hall BD, Harth CM, Kim J, Kim KR, Krummel PB, Lee T, Li S, Liang Q, Lunt MF, Montzka SA, Mühle J, O'Doherty S, Park MK, Reimann S, Salameh PK, Simmonds P, Tunnicliffe RL, Weiss RF, Yokouchi Y, Young D. Increase in CFC-11 emissions from eastern China based on atmospheric observations. Nature 2019; 569:546-550. [PMID: 31118523 DOI: 10.1038/s41586-019-1193-4] [Citation(s) in RCA: 109] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Accepted: 04/02/2019] [Indexed: 11/09/2022]
Abstract
The recovery of the stratospheric ozone layer relies on the continued decline in the atmospheric concentrations of ozone-depleting gases such as chlorofluorocarbons1. The atmospheric concentration of trichlorofluoromethane (CFC-11), the second-most abundant chlorofluorocarbon, has declined substantially since the mid-1990s2. A recently reported slowdown in the decline of the atmospheric concentration of CFC-11 after 2012, however, suggests that global emissions have increased3,4. A concurrent increase in CFC-11 emissions from eastern Asia contributes to the global emission increase, but the location and magnitude of this regional source are unknown3. Here, using high-frequency atmospheric observations from Gosan, South Korea, and Hateruma, Japan, together with global monitoring data and atmospheric chemical transport model simulations, we investigate regional CFC-11 emissions from eastern Asia. We show that emissions from eastern mainland China are 7.0 ± 3.0 (±1 standard deviation) gigagrams per year higher in 2014-2017 than in 2008-2012, and that the increase in emissions arises primarily around the northeastern provinces of Shandong and Hebei. This increase accounts for a substantial fraction (at least 40 to 60 per cent) of the global rise in CFC-11 emissions. We find no evidence for a significant increase in CFC-11 emissions from any other eastern Asian countries or other regions of the world where there are available data for the detection of regional emissions. The attribution of any remaining fraction of the global CFC-11 emission rise to other regions is limited by the sparsity of long-term measurements of sufficient frequency near potentially emissive regions. Several considerations suggest that the increase in CFC-11 emissions from eastern mainland China is likely to be the result of new production and use, which is inconsistent with the Montreal Protocol agreement to phase out global chlorofluorocarbon production by 2010.
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Park S, Kim J, Choi Y, Jo I, Jung S. Establishment of efficient differentiation conditions from tonsil-derived mesenchymal stem cells to motor neuron cells. Cytotherapy 2019. [DOI: 10.1016/j.jcyt.2019.03.495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Cook M, Schaub S, Park S, Hippe D, Liao J, Apisarnthanarax S, Bhatia S, Nghiem P, Tseng Y, Parvathaneni U. 550 Efficacy and toxicity of hypofractionated adjuvant radiotherapy in Merkel cell carcinoma. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.03.626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Park S, Martone C, Greco V. 354 Capturing epithelial-immune interactions to maintain tissue homeostasis. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.03.430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Lachance K, Akaike T, Cahill K, Zawacki L, Singh N, Doolittle-Amieva C, Park S, Morishima C, Hutchinson K, Cater J, Galloway D, Paulson K, Nghiem P. 590 Detecting Merkel cell carcinoma recurrence using a blood test: Outcomes from 774 patients. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.03.666] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Roy P, Park S, Crede V, Anisovich AV, Klempt E, Nikonov VA, Sarantsev AV, Wei NC, Huang F, Nakayama K, Adhikari KP, Adhikari S, Angelini G, Avakian H, Barion L, Battaglieri M, Bedlinskiy I, Biselli AS, Boiarinov S, Briscoe WJ, Brock J, Brooks WK, Burkert VD, Cao F, Carlin C, Carman DS, Celentano A, Chatagnon P, Chetry T, Ciullo G, Cole PL, Contalbrigo M, Cortes O, D'Angelo A, Dashyan N, De Vita R, De Sanctis E, Deur A, Diehl S, Djalali C, Dugger M, Dupre R, Duran B, Egiyan H, Ehrhart M, El Alaoui A, El Fassi L, Eugenio P, Fegan S, Filippi A, Fradi A, Gilfoyle GP, Girod FX, Golovatch E, Gothe RW, Griffioen KA, Guidal M, Guo L, Hafidi K, Hanretty C, Harrison N, Hattawy M, Hayward TB, Heddle D, Hicks K, Holtrop M, Ilieva Y, Ireland DG, Ishkhanov BS, Isupov EL, Jenkins D, Jo HS, Johnston S, Joosten S, Kabir ML, Keith CD, Keller D, Khachatryan G, Khachatryan M, Khanal A, Khandaker M, Kim A, Kim W, Klein FJ, Kubarovsky V, Kuleshov SV, Kunkel MC, Lanza L, Lenisa P, Livingston K, MacGregor IJD, Marchand D, McKinnon B, Meekins DG, Meyer CA, Mineeva T, Mokeev V, Montgomery RA, Movsisyan A, Munoz Camacho C, Nadel-Turonski P, Niccolai S, Niculescu G, Osipenko M, Ostrovidov AI, Paolone M, Pappalardo LL, Paremuzyan R, Pasyuk E, Payette D, Phelps W, Pierce J, Pogorelko O, Prok Y, Protopopescu D, Raue BA, Ripani M, Riser D, Ritchie BG, Rizzo A, Rosner G, Sabatié F, Salgado C, Schumacher RA, Seely ML, Sharabian YG, Shrestha U, Skorodumina I, Sokhan D, Soto O, Sparveris N, Strakovsky II, Strauch S, Taiuti M, Tan JA, Torayev B, Tyler N, Ungaro M, Voskanyan H, Voutier E, Walford NK, Wang R, Watts DP, Wei X, Wood MH, Zachariou N, Zhang J, Zhao ZW. First Measurements of the Double-Polarization Observables F, P, and H in ω Photoproduction off Transversely Polarized Protons in the N^{*} Resonance Region. PHYSICAL REVIEW LETTERS 2019; 122:162301. [PMID: 31075002 DOI: 10.1103/physrevlett.122.162301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 03/12/2019] [Indexed: 06/09/2023]
Abstract
First measurements of double-polarization observables in ω photoproduction off the proton are presented using transverse target polarization and data from the CEBAF Large Acceptance Spectrometer (CLAS) FROST experiment at Jefferson Lab. The beam-target asymmetry F has been measured using circularly polarized, tagged photons in the energy range 1200-2700 MeV, and the beam-target asymmetries H and P have been measured using linearly polarized, tagged photons in the energy range 1200-2000 MeV. These measurements significantly increase the database on polarization observables. The results are included in two partial-wave analyses and reveal significant contributions from several nucleon (N^{*}) resonances. In particular, contributions from new N^{*} resonances listed in the Review of Particle Properties are observed, which aid in reaching the goal of mapping out the nucleon resonance spectrum.
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Walb M, Jethwa K, Park S, Hallemeier C, Pafundi D. PO-0979 The Use of Triggered Imaging for Intrafraction Target Verification in Liver SBRT Breathhold. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)31399-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Lee C, Oh J, Park S, Lee S, Kang S. Comparison of Ambulatory, and Central Blood Pressure in Heart Transplant Recipients. J Heart Lung Transplant 2019. [DOI: 10.1016/j.healun.2019.01.1018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Park S, Bae S, Choi Y. Parity-related molecular signatures and prognosis with breast cancer. Breast 2019. [DOI: 10.1016/s0960-9776(19)30192-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Ahn HK, Park S, Hyun SH, Park K, Lee E, Kim JY, Nam SJ, Kim SW, Lee JE, Lee SK, Yu JH, Ahn JS, Im YH, Park YH. Abstract P3-08-12: PIK3CA mutations in breast cancer: Mutational landscape and clinical implications in ER+/HER2- subtype. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p3-08-12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Introduction: PIK3CA mutation is one of the most frequent genomic alterations in breast cancer. We evaluated PIK3CA mutational status including spatial and temporal heterogeneity, clinical characteristics and prognostic impact focused on ER+/HER2- subtype.
Methods: We performed targeted ultra-deep sequencing (CancerSCAN™) of breast cancer tissue in a prospective cohort. Burden of disease was assessed by metabolic tumor volume(MTV) in 18F-FDG-PET scan. Association with clinical characteristics or survival were tested in ER+/HER2- subtype, using Chi square test or Kaplan-Meier method.
Results: PIK3CA analyses were performed in 1274 breast cancer specimens from 1091 patients. 957 patients had early breast cancer. PIK3CA alterations were found in 397 patients(36.3%), and frequency of PIK3CA mutation was significantly lower in triple negative breast cancer(19.0%), compared with 40.4% in ER+/HER2-, 40.9% in ER+/HER2+, and 45.2% in ER-/HER2+ subtype(p<0.0001). 158 patients had more than two biopsies. Among 92 patients with second biopsy within one month, 11%(10/92) had spatial heterogeneity of PIK3CA mutation. After neoadjuvant chemotherapy, 10%(3/30) of patients had change of PIK3CA mutational status. Serial biopsy at time of recurrence revealed loss or gain of PIK3CA mutation in 10 out of 59 patients (17%). In ER+/HER2- subtype, PIK3CA had a trend toward longer distant disease free survival without statistical significance. In patients with stage IV ER+/HER2- disease, PIK3CA hotspot mutations were associated with significant longer overall survival(OS) (71.0 vs. 37.8 months, p=0.048) and better progression free survival(PFS) at 1st line palliative treatment (37.7 vs. 9.4 months, p = 0.0004). Frequency of symptomatic recurrence, recurrence as oligometastases, and specific metastatic sites were not associated with PIK3CA mutational status, except that bone metastases at first distant metastases was less prevalent in patients with PIK3CA hotspot mutations(35.6% vs. 53.8% in PIK3CA wt, p=0.048). Metabolic tumor volume(MTV) at time of first distant metastases was not associated with presence of PIK3CA mutation.
Conclusion: We observed variations in PIK3CA mutational status in more than 10% of patients with >1 repeated biopsy. In stage IV ER+/HER2- disease, PIK3CA hotspot mutation seemed to be associated with longer PFS and OS, however metabolic tumor burden was not associated with PIK3CA alterations.
Citation Format: Ahn HK, Park S, Hyun SH, Park K, Lee E, Kim J-Y, Nam SJ, Kim SW, Lee JE, Lee SK, Yu JH, Ahn JS, Im Y-H, Park YH. PIK3CA mutations in breast cancer: Mutational landscape and clinical implications in ER+/HER2- subtype [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P3-08-12.
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Pan K, Yan JE, Huynh KT, Peng KA, Ozao-Choy J, Dauphine C, Park S, Dickson PI. Abstract P5-09-13: Disparities in germline mutation testing: do Medi-Cal and uninsured patients with breast cancer receive genetic testing in a safety net setting? Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p5-09-13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: National Comprehensive Cancer Network guidelines recommend that women with breast cancer diagnosed at age ≤50 undergo cancer genetic risk assessment and that those age ≤45 undergo testing for hereditary breast and ovarian cancer (HBOC) syndromes such as BRCA. In prior studies of primarily commercially insured women, 30% of those ≤40 years of age received BRCA testing (Levy 2011), and 34% of those ≤50 years were referred for genetic assessment (Stuckey 2016). Our aim was to determine rates and predictors of genetic testing among publicly insured or uninsured women at a safety net medical center.
Methods: Women diagnosed with invasive breast cancer or ductal carcinoma in situ from 2010 through 2016 were identified from the institutional tumor registry of a Los Angeles County public hospital. Eligible for this analysis were those at high risk for HBOC syndromes as defined by 1) age ≤50 at diagnosis or 2) age ≤60 with triple negative breast cancer. Women were excluded if they received all of their cancer treatment at an outside institution. Medical records were reviewed to determine receipt of genetic testing and test results. Univariate logistic regression was used to evaluate associations between patient characteristics and receipt of testing.
Results: 307 women were included in the analysis. 92.5% (284) were age ≤50 and 54.7% (168) were age ≤45. The majority (72.1%) had Medi-Cal or Medicare and 26.1% were uninsured at diagnosis. The racial distribution was 63.8% Hispanic, 19.2% black, 11.1% Asian and 5.5% non-Hispanic white. Overall, 52.1% (160/307) underwent genetic testing and 13.1% (21/160) were found deleterious germline mutations (BRCA1=10, BRCA2=8, BRCA not specified=1, PALB2=1, TP53=1). Among women who underwent testing, 55.0% were tested for BRCA1/2 only and 36.8% received multigene panel testing; specific testing information was unavailable for the remainder. Age, race/ethnicity, and presence of metastatic disease at diagnosis were associated with differences in genetic testing rates, whereas insurance status and year of cancer diagnosis were not (Table 1).
Conclusions: In a safety net setting with mostly Medi-Cal-insured and uninsured patients, the overall rate of germline mutation testing in women with breast cancer (52.1%) was at least comparable to that in studies of commercially insured populations. Notably, testing rates in this population were significantly different when stratifying by age, race, and cancer stage. These findings highlight subgroups in this underserved population who warrant additional attention to assessment of their cancer genetic risk.
Total (N=307)Number tested% testedP valueAge at diagnosis P<0.001<30 years11872.7 30-39 years654569.2 40-49 years1819552.5 ≥50 years501224.0 Race/ethnicity P=0.011Non-Hispanic white17635.3 Asian341955.9 Black592135.6 Hispanic19611458.2 Unknown100.0 Stage at diagnosis P=0.007Non-metastatic28515554.4 Metastatic22522.7 Insurance P=0.594Uninsured804758.8 Medi-Cal/Medicare*22311149.8 Private insurance2150.0 Unknown2150.0 Year of diagnosis P=0.0982010421740.5 2011472348.9 2012462656.5 2013602948.3 2014392461.5 2015392153.8 2016342058.8 *1 patient had Medicare; the remainder had Medi-Cal
Citation Format: Pan K, Yan JE, Huynh KT, Peng KA, Ozao-Choy J, Dauphine C, Park S, Dickson PI. Disparities in germline mutation testing: do Medi-Cal and uninsured patients with breast cancer receive genetic testing in a safety net setting? [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P5-09-13.
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Choi H, Jeong YJ, Park SH, Kwak MA, Kim KS, Lee Y, Park S. Abstract P1-11-16: Efficacy and safety of acupuncture for the hot flashes in breast cancer patients taking adjuvant tamoxifen: A multicenter study in Korean women. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p1-11-16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background : Tamoxifen is widely used in premenopausal patients with estrogen receptor positive (ER+) breast cancer. Among the side-effects of tamoxifen, hot flashes is a common and challenging one. Previous pilot study suggested the effectiveness of acupuncture for relief of symptoms. This study was performed to evaluate the efficacy and safety of acupuncture for treatment of hot flashes in Korean women breast cancer patients taking tamoxifen as adjuvant endocrine therapy.
Methods : Thirty(30) breast cancer patients taking tamoxifen and reported moderate to severe hot flashes were enrolled from two institutes. Patients were randomly assigned into acupuncture group(n=15) and control group(n=15). The acupuncture group received acupuncture 3 times a week for 4 consecutive weeks, at 5 predefined points(GV 20, M-HN-3, HT 8, KI 10 and LV 2) for 20 ± 5minutes at each session. Control group received no treatment. The score of hot flash visual analogue scale(VAS) and total hot flash score, EORTC QLQ-C30 and QLQ-BR 23 questionnaire were recorded before treatment, once every treatment week and 4 weeks after treatment for both groups.
Results : Acupuncture group showed significantly reduced severity of hot flashes during treatment assessed with either VAS and total hot flash score (p=0.000 and p=0.008, respectively). Also, acupuncture group showed improvement of global health status and physical functioning score assessed with EORTC QLQ-C30 (p=0.004 and p=0.027, respectively). Four weeks after the treatment, these trends were retained. No adverse events were notified
Conclusion : Acupuncture may have feasibility and safety for alleviate hot flashes of Korean women breast cancer patients taking tamoxifen as an adjuvant endocrine therapy. Long-term follow up results and further study with a larger sample size is required.
Citation Format: Choi H, Jeong Y-j, Park S-H, Kwak M-A, Kim K-S, Lee Y, Park S. Efficacy and safety of acupuncture for the hot flashes in breast cancer patients taking adjuvant tamoxifen: A multicenter study in Korean women [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P1-11-16.
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Yoon KH, Lee KB, Lee H, Lee J, Kim JY, Park HS, Park S, Kim SI, Cho YU, Park BW. Abstract P3-03-31: Is sentinel lymph node biopsy necessary in all patients with early breast cancer? Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p3-03-31] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background and objectives : Since the results of the American College of Surgeons Oncology Group Z0011 published, the criteria for applying axillary lymph node (ALN) dissection was relaxed among early breast cancer patients who were scheduled for breast conserving surgery, adjuvant chemotherapy therapy, and adjuvant radiation therapy. SLNB criteria may be established if pathologic nodal status can be predicted. The aim of this study was to develop a nomogram for preoperative prediction of axillary node metastasis.
Methods: The records of 1650 patients with T1, T2 primary invasive breast cancer who were treated between January 2013 and September 2016 were selected from the medical database of Yonsei University (Seoul, South Korea). Those whom a preoperative diagnosis of axillary node metastases were excluded. Two nomogram that predicted three or more axillary metastasis and one or more axillary metastasis were developed using a binary logistic regression model with a training cohort. Internal validation was carried out adopting bootstrap method by validation cohort 500 times resampling.
Result: A total of 82 (4.8%) patients had three or more ALNs metastasis. Three hundred seventy five (17.4%) patients had one or more ALNs metastasis. Axillary metastasis was associated with Preoperative ALN suspicious image findings, clinical tumor size, Number of neoplastic foci, estrogen receptor status, Ki-67 expression, tumor marker. The nomogram was developed based on the clinical and statistically significant predictors. It had good discrimination performance (AUC 0.79, 95% CI, 0.73–0.85), (AUC 0.71, 95% CI, 0.67–0.74) and calibration fit.
Conclusion:Our nomogram might help predict the ALN metastasis in breast cancer patients. Patients with a low probability of ALN metastasis could be spared SLNB.
Citation Format: Yoon KH, Lee KB, Lee H, Lee J, Kim JY, Park HS, Park S, Kim SI, Cho YU, Park B-W. Is sentinel lymph node biopsy necessary in all patients with early breast cancer? [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P3-03-31.
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Jung E, Lee J, Jeong L, Park S, Lee M, Song C, Lee D. Stimulus-activatable echogenic maltodextrin nanoparticles as nanotheranostic agents for peripheral arterial disease. Biomaterials 2019; 192:282-291. [DOI: 10.1016/j.biomaterials.2018.11.022] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 11/07/2018] [Accepted: 11/13/2018] [Indexed: 12/11/2022]
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Park S, Nam T, You J, Kim ES, Choi I, Park J, Cho KH. Evaluating membrane fouling potentials of dissolved organic matter in brackish water. WATER RESEARCH 2019; 149:65-73. [PMID: 30419468 DOI: 10.1016/j.watres.2018.10.079] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2018] [Revised: 10/24/2018] [Accepted: 10/27/2018] [Indexed: 06/09/2023]
Abstract
Isolating dissolved organic matter (DOM) is a preliminary step that improves the accuracy of its characterization. In this study, DOM in brackish water was clearly separated and evaluated by multiple characterization analyses. The sample was divided into three fractions by preparative high-performance liquid chromatography (preparative HPLC) according to molecular size. The homogeneity of each fraction was estimated by analytical size exclusion chromatography (SEC) and fluorescence excitation-emission matrix (FEEM). Pyrolysis gas chromatography-mass spectrometry (Py-GC/MS) and liquid chromatography-organic carbon detection (LC-OCD) were used to characterize the physicochemical properties of each fraction. Py-GC/MS revealed that Fraction 1 consisted of evenly distributed organic matter in order polysaccharides, proteins, polyhydroxy aromatics, lignins, and lipids. However, Fraction 2 was primarily composed of dominant lipids and low portion of proteins, and Fraction 3 was composed predominantly of lignins and lipids. The LC-OCD results showed that Fractions 1 and 2 had similar organic carbon (OC) compositions: a humic substance (ca. 37%), building blocks (ca. 10%), and neutrals (ca. 37%), whereas Fraction 3 contained a high proportion of neutrals (62%). In the fouling experiments, the distinct DOM characteristics in each fraction resulted in different declining flux behaviors, ranked as: Fraction 2 > Fraction 1 > Fraction 3.
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Peng C, de Sousa FB, Gan HY, Kwon HJ, Park S, Kilpatrick-Liverman L, Wang W, Lavender S, Pilch S, Han J. Enhanced Delivery of F -, Ca 2+, K +, and Na + Ions into Enamel by Electrokinetic Flows. J Dent Res 2019; 98:430-436. [PMID: 30676839 DOI: 10.1177/0022034518818463] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
As the outermost layer of the tooth crown, dental enamel is the most mineralized tissue in mammals, consisting of hydroxyapatite crystallites separated by long and narrow nanochannels. A major challenge in dentistry is how various molecules can be infiltrated into these nanopores in an efficient and controlled way. Here we show a robust method to transport various ions of interest, such as fluoride (F-), potassium (K+), calcium (Ca++), and sodium (Na+), into these nanopores by electrokinetic flows. It is verified by fluorescence microscopy, laser-scanning confocal microscopy, mass spectrometry, and ion selective electrode technique. Different ions are demonstrated to infiltrate through the entire depth of the enamel layer (~1 mm), which is significantly enhanced penetration compared with diffusion-based infiltration. Meanwhile, transport depth and speed can be controlled by infiltration time and applied voltage. This is the first demonstration of reliably delivering both anions and cations into the enamel nanopores. This technique opens opportunities in caries prevention, remineralization, tooth whitening, and nanomedicine delivery in clinical dentistry, as well as other delivery challenges into various biomaterials such as bones.
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