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Kim SB, Shin JH, Kim GJ, Hong SC. Promoting Metal–Support Interaction on Pt/TiO 2 Catalyst by Antimony for Enhanced Carbon Monoxide Oxidation Activity at Room Temperature. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c01518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Su Bin Kim
- Environmental Technology Division, Korea Testing Laboratory, 87 Digital-ro 26-gil, Guro-gu, Seoul08389, South Korea
| | - Jung Hun Shin
- Department of Environmental Energy Engineering, Graduate School of Kyonggi University, 154-42 Gwanggyosan-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do16227, South Korea
| | - Geo Jong Kim
- Chemical & Process Technology Division, Korea Research Insititute of Chemical Technology, 141 Gajeong-ro, Yuseong-gu, Daejeon34114, South Korea
| | - Sung Chang Hong
- Department of Environmental Energy Engineering, Kyonggi University, 154-42 Gwanggyosan-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do16227, South Korea
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Kim BS, Lee Y, Shin JH. Impact of estimated pulse wave velocity on cardiovascular outcomes in a general population. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.2832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Background
Estimated pulse wave velocity (ePWV), a simple surrogate estimate of carotid-femoral pulse wave velocity which was gold standard for measuring aortic stiffness, has been demonstrated to predict cardiovascular (CV) outcome. However, there was limited data on its predictive capacity for CV outcomes in the general population. The study aim was to investigate the independent association between ePWV and CV outcomes in general population.
Methods
A total of 10,030 subjects aged between 40 and 69 years were followed over 18-year period in the Ansan-Ansung cohort study. Levels of ePWV, which was calculated from an equation based on age and mean blood pressure, were categorized according to quartiles. A major adverse cardiovascular event (MACE) was defined as a composite of myocardial infarction, coronary artery disease, stroke, heart failure, peripheral artery disease, and cardiovascular death.
Results
The incidence rates of CV death, and MACE were 7.0% and 22.1% in the fourth (highest) quartile of ePWV and 0.1% and 4.5% in the first (lowest) quartile of ePWV. After adjusting for relevant covariates, patients with third and fourth quartile of ePWV showed significantly higher risk of CV death (hazard ratio [HR] 3.92; 95% confidence intervals [CI] 1.09–14.15 in third quartile and HR 8.53; 95% CI 2.13–34.10 in fourth quartile), and MACE (HR 1.54; 95% CI 1.15–2.08 in third quartile and HR 1.56; 95% CI 1.05–2.32) compared to the reference of first (lowest) quartile of ePWV. However, there were no improvement of C statistic for CV death and MACE when adding ePWV to the Cox regression models with 10-year atherosclerotic cardiovascular disease (ASCVD) risk.
Conclusion
These results suggest that ePWV predicted CV death and MACE in general population. The value of ePWV, a simple and useful indicator of aortic stiffness, is expected to serve as a potential marker to identify high risk groups of CV event in general population.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- B S Kim
- Hanyang University Guri Hospital , Guri , Korea (Republic of)
| | - Y Lee
- Hanyang University Guri Hospital , Guri , Korea (Republic of)
| | - J H Shin
- Hanyang University Guri Hospital , Guri , Korea (Republic of)
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Lee Y, Shin JH, Kim BS, Kim WH, Kook H, Park HC. Influence of concomitant percutaneous transluminal angioplasty with percutaneous coronary intervention on outcomes in patients with stable lower extremity artery disease. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Patients with stable lower extremity artery diseases (LEAD) frequently present with coronary artery diseases; thus, concomitant percutaneous transluminal angioplasty (PTA) at the time of percutaneous coronary intervention (PCI) is often performed. We investigated the influence of concomitant PTA on both cardiovascular (CV) and limb outcomes in the Korean National Health Insurance Service registry.
Methods
Among 78,185 patients undergoing PCI between 2012 and 2015, 6,563 patients (279 for the PTA+PCI group vs. 6,284 for the PCI group) suffering from stable LEAD without limb ischemia were included. Major adverse CV events (MACEs) were defined as a composite of CV death, myocardial infarction (MI) and coronary revascularization. Patients were followed for at least 3 years.
Results
After 1:5 propensity score matching was conducted, 279 patients in the PTA+PCI group and 1,385 patients in the PCI group were compared. The risk of all-cause death was higher in the PTA+PCI group than in the PCI group, whereas the risks of MACE, MI, revascularization, stroke, CV death and bleeding event were not different between the 2 groups in the matched cohort. In contrast, the risks of end-stage renal diseases and unfavorable limb outcomes were higher in the PTA+PCI group than in the PCI group (Figure 1). Mediation analyses revealed that amputation and repeat Percutaneous transluminal angioplasty after discharge significantly mediated the association between the concomitant PTA and all-cause death (Figure 2).
Conclusions
CPTA at the time of PCI is not associated with an increased risk of CV events but may increase the risk of all-cause death by increasing unfavorable renal and limb outcomes in patients with stable LEAD.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- Y Lee
- Hanyang University, Division of Cardiology, Department of internal medicine , Seoul , Korea (Republic of)
| | - J H Shin
- Hanyang University, Division of Cardiology, Department of internal medicine , Seoul , Korea (Republic of)
| | - B S Kim
- Hanyang University Guri Hospital , Seoul , Korea (Republic of)
| | - W H Kim
- Hanyang University, Division of Cardiology, Department of internal medicine , Seoul , Korea (Republic of)
| | - H Kook
- Hanyang University, Division of Cardiology, Department of internal medicine , Seoul , Korea (Republic of)
| | - H C Park
- Hanyang University, Division of Cardiology, Department of internal medicine , Seoul , Korea (Republic of)
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Lee Y, Shin J, Park JK, Shin JH, Kim HJ, Park HC, Heo R. Associations between changing patterns of ST-T waves morphologies in rest electrocardiography and cardiovascular risk in an asymptomatic low risk population: a report from Ansan-Ansung cohort study. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.2522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
While clinical significance of ST-T wave abnormalities (STA) in rest electrocardiography (ECG) on long-term cardiovascular outcomes has been on debate, few studies have been reported on the association between the changes in ST-T waves in rest ECG and cardiovascular outcomes in low risk populations. We investigate the changing patterns of STA in rest ECG and the predictive value of the changes in ST-T wave in rest ECG for cardiovascular events in an asymptomatic general population.
Methods
A longitudinal community-based cohort study was conducted for 12 years. Koreans aged 40–69 years were followed biennially through scheduled revisit for comprehensive assessments. Among 10,030 participants, 6,648 participants who did not have any cardiovascular diseases, angina-related symptoms or pathologic Q waves in rest ECG at baseline were included for analysis. Changes in STAs were defined using the changes between ECG at baseline and that at the first revisit. A major adverse cardiovascular events was defined as a composite of cardiac death, myocardial infarction, clinical diagnosis of coronary artery disease and stroke.
Results
Among 5,924 participants without STA at baseline, only 187 participants (3.2%) developed new STA. Among 724 patients (10.9%) with STA at baseline, 274 patients (37.8%) persistently showed STA at the first revisit. MACEs occurred more frequently in the participants persistently with STA and those with newly-developed STA than in the participants persistently without STA (Figure 1). Multivariate Cox-proportional hazard models showed that a higher risk of MACE was only associated with the persisted STA (HR 1.69; 95% CI 1.10–2.63). In participants with baseline STA, persisted T-wave flattening was associated with a higher risk of MACE, whereas T-wave inversion, either persisted or fluctuated was not associated with a higher risk of MACE, compared with persistent absence of STA (Figure 2). In the participants without baseline STAs, multivariate Cox-proportional hazard model showed that newly-developed T-wave flattening (HR 1.85; 95% CI 0.20–2.84), not T-wave inversion (HR 1.50; 95% CI 0.85–2.65) was associated with a higher risk of MACE. Survival receiver operating curve analysis showed that the changes in STAs had a C-index of 0.538 (95% CI 0.511–0.558), a sensitivity of 13.0% and a specificity of 92.5% and add only a small value to the predictive power of 10-year atherosclerotic cardiovascular diseases risk estimator (C-index without STA changes 0.708 [0.681–0.736] vs. C-index with STA changes 0.721 [0.694–0.748]).
Conclusions
STAs uncommonly developed while frequently disappeared spontaneously in the asymptomatic general population. Persisted STA and newly developed STA in rest ECG were predictive of future cardiovascular events in the asymptomatic general population. However, the changes in STAs did not significantly improve the predictive value of the conventional risk estimator, when added.
Funding Acknowledgement
Type of funding sources: Public grant(s) – National budget only. Main funding source(s): National Research Foundation of Korea Figure 1Figure 2
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Affiliation(s)
- Y Lee
- Hanyang University Guri Hospital, Seoul, Korea (Republic of)
| | - J Shin
- Hanyang University, Division of Cardiology, Department of internal medicine, Seoul, Korea (Republic of)
| | - J K Park
- Hanyang University, Division of Cardiology, Department of internal medicine, Seoul, Korea (Republic of)
| | - J H Shin
- Hanyang University, Division of Cardiology, Department of internal medicine, Seoul, Korea (Republic of)
| | - H J Kim
- Hanyang University, Division of Cardiology, Department of internal medicine, Seoul, Korea (Republic of)
| | - H C Park
- Hanyang University, Division of Cardiology, Department of internal medicine, Seoul, Korea (Republic of)
| | - R Heo
- Hanyang University, Division of Cardiology, Department of internal medicine, Seoul, Korea (Republic of)
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Lee Y, Shin J, Shin JH, Kim HJ, Ryu MH, Park HC, Lim HY, Park JK, Heo R, Kim WH. Simulation and validation for count-based binary decision of target blood pressure achievement in home blood pressure monitoring data analysis for clinical practice. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.2351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Introduction
Home blood pressure monitoring (HBPM) is a useful tool to identify hypertension and to decide whether a patient's blood pressure (BP) is controlled. The use of automatized oscillometric BP measurement devices has become increasingly popular with help of information technology and internet of things to the devices. However, applying HBPM to daily clinical practices is still challenging, because most patients with hypertension are in age groups not familiar to digital devices and internet and high BP criteria using average home BP values are often useless in outpatient clinics without easily accessible average BP calculation tools. Therefore, we developed a simple and straightforward method to interpret HBPM through counts of BP ≥135/85 mmHg.
Methods
We simulated 400 cases of HBPM using a random number generator function in statistical software. The simulated average home systolic BP (SBP) and its standard deviation (SD) were 125±15 mmHg and 12±5 mmHg and the number of HBP readings was 24 times. The simulated diastolic BP (DBP) was randomly selected to 50–75% of the SBP. The validation of the binary interpretation method was conducted using actual HBPM data from 386 subjects in a rural area of South Korea. Receiver operating characteristics curve analysis was conducted, and linear regression and logarithmic models were fitted between the numbers of home BP ≥135/85 mmHg and mean BP. Hypertension was defined with average home BP ≥135/85 mmHg.
Results
In the simulated cohort, hypertension was presented in 197 cases (49.3%). The C-index of the numbers of BP readings ≥135/85 mmHg was 0.994 (95% confidence interval [CI] 0.990–0.998), and ≥12 of 24 BP readings ≥135/85 mmHg showed a sensitivity of 95.4%, a specificity of 95.1% and an accuracy of 95.3% for the diagnosis of hypertension. In validation cohort, the numbers of home BP measurements varied from 8 to 81 times. The validation cohort similarly showed that the C-index of the ratio between the number of high BP readings (≥135/85 mmHg) to the number of BP measurements (R-NHBP/NBP) was 0.985 (95% CI, 0.976–0.994) and the best accuracy was shown at R-NHBP/NBP of ≥0.45. R-NHBP/NBP of ≥0.5 showed a sensitivity of 0.957, a specificity of 0.907 and an accuracy of 0.927. The accuracy of the R-NHBP/NBP of ≥0.5 decreased as SD and the range of SBP increased, whereas it did not change with the number of measurements (Figure 1). R-NHBP/NBP <0.2 predicted normotension and R-NHBP/NBP >0.8 predicted hypertension in 95% confidence. Mean widths of the 95 prediction intervals for the average SBP and DBP were 18.2 mmHg and 12.6 mmHg, respectively (Figure 2).
Conclusion
Counting the number of BP ≥135/85 mmHg can provide accurate assessments for the BP levels. R-NHBP/NBP of ≥0.5 is a simple and accurate marker of high BP in HBPM, and R-NHBP/NBP could be a useful tool to assess BP levels in patients practicing HBPM.
Funding Acknowledgement
Type of funding sources: None. Figure 1Figure 2
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Affiliation(s)
- Y Lee
- Hanyang University Guri Hospital, Seoul, Korea (Republic of)
| | - J Shin
- Hanyang University, Division of Cardiology, Department of internal medicine, Seoul, Korea (Republic of)
| | - J H Shin
- Hanyang University, Division of Cardiology, Department of internal medicine, Seoul, Korea (Republic of)
| | - H J Kim
- Hanyang University, Division of Cardiology, Department of internal medicine, Seoul, Korea (Republic of)
| | - M H Ryu
- Hanyang University Guri Hospital, Seoul, Korea (Republic of)
| | - H C Park
- Hanyang University, Division of Cardiology, Department of internal medicine, Seoul, Korea (Republic of)
| | - H Y Lim
- Hanyang University, Division of Cardiology, Department of internal medicine, Seoul, Korea (Republic of)
| | - J K Park
- Hanyang University, Division of Cardiology, Department of internal medicine, Seoul, Korea (Republic of)
| | - R Heo
- Hanyang University, Division of Cardiology, Department of internal medicine, Seoul, Korea (Republic of)
| | - W H Kim
- Hanyang University, Division of Cardiology, Department of internal medicine, Seoul, Korea (Republic of)
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Tsauo J, Noh SY, Shin JH, Gwon DI, Han K, Lee JM, Jeon UB, Kim YH. Retrograde transvenous obliteration for the prevention of variceal rebleeding in patients with hepatocellular carcinoma: a multicentre retrospective study. Clin Radiol 2021; 76:681-687. [PMID: 34140137 DOI: 10.1016/j.crad.2021.05.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 05/14/2021] [Indexed: 12/14/2022]
Abstract
AIM To evaluate the effectiveness and safety of retrograde transvenous obliteration (RTO) for the prevention of variceal rebleeding variceal rebleeding in patients with hepatocellular carcinoma (HCC). MATERIALS AND METHODS This multicentre retrospective study enrolled 79 patients with HCC who underwent RTO for the prevention of variceal rebleeding. Successful occlusion of the gastrorenal shunt and obliteration of the gastric varices were achieved in 74 patients, with a technical success rate of 93.7%. Of the remaining 74 patients (mean age, 64.9±10.3 years; 56 men), 66 (90.4%) had gastroesophageal varices and seven (9.6%) had isolated gastric varices. Thirty-two patients (43.8%) underwent balloon-occluded RTO, 40 patients (54.8%) underwent plug-assisted RTO, and one patient (1.4%) underwent coil-assisted RTO. No patients had major procedural complications. RESULTS Rebleeding occurred in seven patients (9.6%) during the follow-up period. The 6-week and 1-year actuarial probabilities of patients remaining free of rebleeding were 90.8±3.6% and 88.6±4.1%, respectively. The median survival was 12.6 (95% confidence interval [CI] 8-17.3) months. The 6-week, 1-year, and 3-year actuarial probabilities of survival were 83.2±4.4%, 51.1±6.6%, and 32.7±7%, respectively. New or worsening ascites and oesophageal varices occurred in 12 (16.4%) and 13 patients (17.8%), respectively, during the follow-up period. Overt hepatic encephalopathy occurred in one patient (1.4%) during the follow-up period. The Child-Pugh score remained comparable to that at baseline at 1 and 3 months. CONCLUSION RTO was effective and safe in preventing variceal rebleeding in patients with HCC.
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Affiliation(s)
- J Tsauo
- Department of Interventional Therapy, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - S Y Noh
- Department of Radiology, Kyung Hee University Seoul Hospital, Seoul, South Korea
| | - J H Shin
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea.
| | - D I Gwon
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - K Han
- Department of Radiology, Severance Hospital, Yonsei University College of Medicine, Seoul, South Korea
| | - J M Lee
- Department of Radiology, Soonchunhyang University Hospital, Bucheon, South Korea
| | - U B Jeon
- Department of Radiology, Pusan National University Yangsan Hospital, Yangsan, South Korea
| | - Y H Kim
- Department of Radiology, Daegu Catholic University Medical Center, Daegu, South Korea
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Alhazemi AA, Park S, Shin JH, Cho YC, Kim Y, Lee J, Kim PH, Kim JW, Chu HH. Safety and efficacy of transarterial embolisation for treatment of dorsal pancreatic artery haemorrhage. Clin Radiol 2020; 76:314.e9-314.e15. [PMID: 33334554 DOI: 10.1016/j.crad.2020.11.111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 11/12/2020] [Indexed: 11/28/2022]
Abstract
AIM To evaluate the safety and efficacy of transarterial embolisation (TAE) of dorsal pancreatic artery (DPA) haemorrhage. MATERIALS AND METHODS Nineteen consecutive patients (M:F = 16:3, mean age 59.6 years) who underwent TAE of DPA in three tertiary medical centres between January 2001 to January 2020 were reviewed retrospectively. Angiographic features and the technical and clinical outcomes of TAE were analysed. RESULTS The clinical presentations were a bloody drain from the Jackson-Pratt drainage tube (n=8), melaena (n=7), abdominal pain (n=4), and haematochezia (n=3). Angiographic findings included pseudoaneurysm (n=14), contrast media extravasation (n=4), or abrupt cut-off of the arterial branch (n=1). The NBCA (N-butyl-cyanoacrylate; n=4), microcoils (n=4), and a combination of these agents (n=7) were used as embolic agents. The most common origin of the DPA in the present study cohort was the splenic artery (n=7), followed by the coeliac trunk (n=4), common hepatic artery (n=4), and superior mesenteric artery (n=4). Technical and clinical success rates were 100% and 84.2% (16/19), respectively. Of the three clinically unsuccessful cases, two patients were revealed to have newly developed bleeding from another artery. The other patient expired 1 day after the TAE procedure due to a progression of hepatic failure. In one patient, an asymptomatic non-target embolisation occurred in the right posterior tibial artery as a procedure-related complication. No major complications were observed. CONCLUSION TAE is safe and effective for the management of bleeding from the DPA. It is important to be aware of the DPA as a potential bleeding source, including the relevant clinical characteristics.
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Affiliation(s)
- A A Alhazemi
- Department of Radiology, King Fahd Central Hospital, Jazan 45196, Saudi Arabia
| | - S Park
- Department of Radiology, Gil Medical Centre, Gachon University College of Medicine, Incheon, Republic of Korea
| | - J H Shin
- Department of Radiology and Research Institute of Radiology, Asan Medical Centre, University of Ulsan College of Medicine, Seoul, Republic of Korea.
| | - Y C Cho
- Department of Radiology and Research Institute of Radiology, Asan Medical Centre, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Y Kim
- Department of Radiology Chungbuk National University Hospital, Cheongju, Republic of Korea
| | - J Lee
- Department of Radiology Chungbuk National University Hospital, Cheongju, Republic of Korea
| | - P H Kim
- Department of Radiology and Research Institute of Radiology, Asan Medical Centre, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - J W Kim
- Department of Radiology and Research Institute of Radiology, Asan Medical Centre, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - H H Chu
- Department of Radiology and Research Institute of Radiology, Asan Medical Centre, University of Ulsan College of Medicine, Seoul, Republic of Korea
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Park S, Park SH, Hwang JH, Kim JH, Lee KH, Park SH, Shin JH, Pak SY, Kang JM. Low-dose CT angiography of the lower extremities: a comparison study of image quality and radiation dose. Clin Radiol 2020; 76:156.e19-156.e26. [PMID: 33256975 DOI: 10.1016/j.crad.2020.10.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 10/28/2020] [Indexed: 01/22/2023]
Abstract
AIM To investigate the image quality and radiation dose of ultralow-dose (ULD) and low-dose (LD) lower-extremity computed tomography (CT) angiography (LE-CTA) using the advanced modelled iterative reconstruction (ADMIRE) algorithm to detect peripheral arterial disease (PAD) in comparison with standard-dose (SD) CT. MATERIALS AND METHODS One hundred and seven consecutive patients were examined using LE-CTA at 70 kVp and a dual-source scanner to achieve three image sets using 30% (ULD), 70% (LD), and 100% (SD) tube loads. Qualitative analysis was conducted by examining the three image sets for overall quality. The image quality of arterial segments was analysed by two independent readers. In addition, the CT dose index (CTDIvol) was measured in the three image sets. RESULTS The mean overall quality scores were 3.4±0.6 for ULD CT, 3.9±0.3 for LD CT, and 3.9±0.2 for SD CT. Both readers scored the arterial segments as 2-4 (adequate-excellent) in the three image sets. In addition, 89.4% (93/104) and 54.8% (57/104) segments of PAD with calcified plaques were scored 4 between SD and LD CT and between SD and ULD CT, respectively, and 45.2% (47/104) segments had a lower score by one point in ULD CT compared with SD CT. The mean CTDIvol was 4.1±1.1 mGy for SD CT, 2.9±0.8 mGy for LD CT, and 1.2±0.3 mGy for ULD CT. CONCLUSIONS LD/ULD CT at 70 kVp using ADMIRE reconstruction enables a reduction in the radiation dose while enabling adequate evaluation or follow-up of PAD based on LE-CTA.
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Affiliation(s)
- S Park
- Department of Radiology, Gil Medical Center, Gachon University College of Medicine, 21, Namdong-daero 774beon-gil, Namdong-gu, Incheon, Republic of Korea
| | - S H Park
- Department of Radiology, Gil Medical Center, Gachon University College of Medicine, 21, Namdong-daero 774beon-gil, Namdong-gu, Incheon, Republic of Korea
| | - J H Hwang
- Department of Radiology, Gil Medical Center, Gachon University College of Medicine, 21, Namdong-daero 774beon-gil, Namdong-gu, Incheon, Republic of Korea.
| | - J H Kim
- Department of Radiology, Gil Medical Center, Gachon University College of Medicine, 21, Namdong-daero 774beon-gil, Namdong-gu, Incheon, Republic of Korea
| | - K H Lee
- Department of Radiology, Gil Medical Center, Gachon University College of Medicine, 21, Namdong-daero 774beon-gil, Namdong-gu, Incheon, Republic of Korea
| | - S H Park
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - J H Shin
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - S Y Pak
- Department of Biomedical Engineering, Asan Medical Institute of Convergence Science and Technology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - J M Kang
- Department of Surgery, Gil Medical Center, Gachon University College of Medicine, 21, Namdong-daero 774beon-gil, Namdong-gu, Incheon, Republic of Korea
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Singh PK, Pathak VB, Shin JH, Choi IW, Nakajima K, Lee SK, Sung JH, Lee HW, Rhee YJ, Aniculaesei C, Kim CM, Pae KH, Cho MH, Hojbota C, Lee SG, Mollica F, Malka V, Ryu CM, Kim HT, Nam CH. Electrostatic shock acceleration of ions in near-critical-density plasma driven by a femtosecond petawatt laser. Sci Rep 2020; 10:18452. [PMID: 33116228 PMCID: PMC7595239 DOI: 10.1038/s41598-020-75455-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 09/14/2020] [Indexed: 11/17/2022] Open
Abstract
With the recent advances in ultrahigh intensity lasers, exotic astrophysical phenomena can be investigated in laboratory environments. Collisionless shock in a plasma, prevalent in astrophysical events, is produced when a strong electric or electromagnetic force induces a shock structure in a time scale shorter than the collision time of charged particles. A near-critical-density (NCD) plasma, generated with an intense femtosecond laser, can be utilized to excite a collisionless shock due to its efficient and rapid energy absorption. We present electrostatic shock acceleration (ESA) in experiments performed with a high-density helium gas jet, containing a small fraction of hydrogen, irradiated with a 30 fs, petawatt laser. The onset of ESA exhibited a strong dependence on plasma density, consistent with the result of particle-in-cell simulations on relativistic plasma dynamics. The mass-dependent ESA in the NCD plasma, confirmed by the preferential reflection of only protons with two times the shock velocity, opens a new possibility of selective acceleration of ions by electrostatic shock.
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Affiliation(s)
- Prashant Kumar Singh
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea
| | - Vishwa Bandhu Pathak
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea
| | - Jung Hun Shin
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea
| | - Il Woo Choi
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea.,Advanced Photonics Research Institute, Gwangju Institute of Science & Technology (GIST), Gwangju, 61005, Republic of Korea
| | - Kazuhisa Nakajima
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea
| | - Seong Ku Lee
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea.,Advanced Photonics Research Institute, Gwangju Institute of Science & Technology (GIST), Gwangju, 61005, Republic of Korea
| | - Jae Hee Sung
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea.,Advanced Photonics Research Institute, Gwangju Institute of Science & Technology (GIST), Gwangju, 61005, Republic of Korea
| | - Hwang Woon Lee
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea
| | - Yong Joo Rhee
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea
| | - Constantin Aniculaesei
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea
| | - Chul Min Kim
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea.,Advanced Photonics Research Institute, Gwangju Institute of Science & Technology (GIST), Gwangju, 61005, Republic of Korea
| | - Ki Hong Pae
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea.,Advanced Photonics Research Institute, Gwangju Institute of Science & Technology (GIST), Gwangju, 61005, Republic of Korea
| | - Myung Hoon Cho
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea
| | - Calin Hojbota
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea.,Department of Physics and Photon Science, GIST, Gwangju, 61005, Republic of Korea
| | - Seong Geun Lee
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea.,Department of Physics and Photon Science, GIST, Gwangju, 61005, Republic of Korea
| | - Florian Mollica
- Amplitude Laser Group, 91090, Lisses, France.,Laboratoire D'Optique Appliquée, ENSTA-ParisTech, Ecole Polytechnique, 828 Boulevard des Marechaux, 91762, Palaiseau CEDEX, France
| | - Victor Malka
- Laboratoire D'Optique Appliquée, ENSTA-ParisTech, Ecole Polytechnique, 828 Boulevard des Marechaux, 91762, Palaiseau CEDEX, France.,Weizmann Institute of Science, P.O. Box 26, 76100, Rehovot, Israel
| | - Chang-Mo Ryu
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea
| | - Hyung Taek Kim
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea. .,Advanced Photonics Research Institute, Gwangju Institute of Science & Technology (GIST), Gwangju, 61005, Republic of Korea.
| | - Chang Hee Nam
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea. .,Department of Physics and Photon Science, GIST, Gwangju, 61005, Republic of Korea.
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10
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Shin JH, Le NTK, Jang H, Lee T, Kang K. Supramolecular Regulation of Polydopamine Formation by Amyloid Fibers. Chemistry 2020; 26:5500-5507. [PMID: 32092201 DOI: 10.1002/chem.202000437] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 02/19/2020] [Indexed: 11/10/2022]
Abstract
Polydopamine (PD) and melanin species are chemically complex systems, the formation and properties of which are incompletely understood. Inspired by the role of functional amyloids in melanin biosynthesis, this paper examines the influences of the supramolecular structure of amyloids on oxidative polymerization of dopamine. Kinetic analyses on the formation of PD species in the presence of hen egg white lysozyme (HEWL) fibers or soluble HEWL revealed that both forms gave rise to the total quantity of PD species, but the rate of their formation could be accelerated only by the amyloid form. PD species formed with HEWL fibers showed a morphology of bundled fibers, whereas those with soluble HEWL had a mesh-like structure. Amyloid fibers of recombinant Pmel17 had properties similar to those of HEWL fibers in modulating PD formation. The results presented here suggest how nature designs functionality with an amyloid structure and can help understand and engineer chemistries of other functional amyloids.
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Affiliation(s)
- J H Shin
- Department of Applied Chemistry, Kyung Hee University, 1732 Deogyoung-daero, Yongin, Gyeonggi, 17104, Republic of Korea
| | - Nghia T K Le
- Department of Applied Chemistry, Kyung Hee University, 1732 Deogyoung-daero, Yongin, Gyeonggi, 17104, Republic of Korea
| | - Hongje Jang
- Department of Chemistry, Kwangwoon University, 20 Gwangwoon-ro, Nowon-gu, Seoul, 01897, Republic of Korea
| | - Taehoon Lee
- Department of Applied Chemistry, Kyung Hee University, 1732 Deogyoung-daero, Yongin, Gyeonggi, 17104, Republic of Korea
| | - Kyungtae Kang
- Department of Applied Chemistry, Kyung Hee University, 1732 Deogyoung-daero, Yongin, Gyeonggi, 17104, Republic of Korea
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11
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Kwon MR, Shin JH, Park H, Cho H, Hahn SY, Park KW. Radiomics Study of Thyroid Ultrasound for Predicting BRAF Mutation in Papillary Thyroid Carcinoma: Preliminary Results. AJNR Am J Neuroradiol 2020; 41:700-705. [PMID: 32273326 DOI: 10.3174/ajnr.a6505] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 12/17/2019] [Indexed: 12/19/2022]
Abstract
BACKGROUND AND PURPOSE It is not known how radiomics using ultrasound images contribute to the detection of BRAF mutation. This study aimed to evaluate whether a radiomics study of gray-scale ultrasound can predict the presence or absence of B-Raf proto-oncogene, serine/threonine kinase (BRAF) mutation in papillary thyroid cancer. MATERIALS AND METHODS The study retrospectively included 96 thyroid nodules that were surgically confirmed papillary thyroid cancers between January 2012 and June 2013. BRAF mutation was positive in 48 nodules and negative in 48 nodules. For analysis, ROIs from the nodules were demarcated manually on both longitudinal and transverse sonographic images. We extracted a total of 86 radiomics features derived from histogram parameters, gray-level co-occurrence matrix, intensity size zone matrix, and shape features. These features were used to build 3 different classifier models, including logistic regression, support vector machine, and random forest using 5-fold cross-validation. The performance including accuracy, sensitivity, specificity, positive predictive value, negative predictive value, and area under the receiver operating characteristic curve, of the different models was evaluated. RESULTS The incidence of high-suspicion nodules diagnosed on ultrasound was higher in the BRAF mutation-positive group than in the mutation-negative group (P = .004). The radiomics approach demonstrated that all classification models showed moderate performance for predicting the presence of BRAF mutation in papillary thyroid cancers with an area under the curve value of 0.651, accuracy of 64.3%, sensitivity of 66.8%, and specificity of 61.8%, on average, for the 3 models. CONCLUSIONS Radiomics study using thyroid sonography is limited in predicting the BRAF mutation status of papillary thyroid carcinoma. Further studies will be needed to validate our results using various diagnostic methods.
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Affiliation(s)
- M-R Kwon
- From the Department of Radiology (M.-r.K., J.H.S., S.Y.H., K.W.P.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
- Department of Radiology (M.-r.K.), Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - J H Shin
- From the Department of Radiology (M.-r.K., J.H.S., S.Y.H., K.W.P.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - H Park
- Center for Neuroscience Imaging Research/School of Electronic and Electrical Engineering (H.P.), Sungkyunkwan University, Suwon, Korea
| | - H Cho
- Center for Neuroscience Imaging Research/Department of Electronic and Computer Engineering (H.C.), Sungkyunkwan University, Suwon, Korea
| | - S Y Hahn
- From the Department of Radiology (M.-r.K., J.H.S., S.Y.H., K.W.P.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - K W Park
- From the Department of Radiology (M.-r.K., J.H.S., S.Y.H., K.W.P.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
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12
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Affiliation(s)
- Geo Jong Kim
- Department of Chemical and Materials Engineering, University of Kentucky, 4810 Alben Barkley Drive, Paducah, Kentucky 42002, United States
| | - Alisha M. Boone
- Department of Chemical and Materials Engineering, University of Kentucky, 4810 Alben Barkley Drive, Paducah, Kentucky 42002, United States
| | - Michael Chesnut
- Department of Chemical and Materials Engineering, University of Kentucky, 4810 Alben Barkley Drive, Paducah, Kentucky 42002, United States
| | | | | | - Hyun Tae Hwang
- Department of Chemical and Materials Engineering, University of Kentucky, 4810 Alben Barkley Drive, Paducah, Kentucky 42002, United States
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13
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Park YH, Lee SJ, Cho EY, La Choi Y, Lee JE, Nam SJ, Yang JH, Shin JH, Ko EY, Han BK, Ahn JS, Im YH. Clinical relevance of TNM staging system according to breast cancer subtypes. Ann Oncol 2019; 30:2011. [PMID: 31408085 DOI: 10.1093/annonc/mdz223] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/09/2023] Open
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14
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Park S, Jeong B, Shin JH, Kim JH, Kim JW, Gwon DI, Ko GY, Chen CS. Interventional treatment of arterial injury during blind central venous catheterisation in the upper thorax: experience from two centres. Clin Radiol 2019; 75:158.e1-158.e7. [PMID: 31711638 DOI: 10.1016/j.crad.2019.10.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 10/03/2019] [Indexed: 12/01/2022]
Abstract
AIM To evaluate the safety and clinical efficacy of interventional treatment for arterial injury during blind, central venous catheterisation in the upper thorax at two tertiary medical centres. MATERIALS AND METHODS Eighteen consecutive patients (37-81 years; M:F=8:10) who underwent interventional treatment for the arterial injuries that occurred during central venous catheterisation without any imaging guidance between November 2007 and December 2018 were included. Clinical data, angiographic findings, detailed interventional procedures, and technical and clinical outcomes were analysed retrospectively. RESULTS Arterial injury sites were the subclavian artery/branches (n=12), axillary artery/branches (n=2), and common carotid artery (n=4). The target vein was not correlated with the corresponding artery/branches in eight patients (44.4%); internal jugular vein to subclavian artery branches. Angiographic findings were pseudoaneurysm (66.7%, 12/18), contrast medium extravasation (22.2%, 4/18), or both (11.1%, n=2). A stent graft was inserted for the main trunk injuries in nine patients, with (n=2) or without (n=7) prior arterial branch embolisation to prevent potential endoleak, while embolisation for the arterial branch injuries was performed in nine patients. Direct percutaneous access with thrombin injection to the pseudoaneurysm or residual arteriovenous fistula was utilised in two. The technical and clinical success rate was 94.4% (17/18) each. There were no procedure-related complications. In one patient without immediate clinical success, there was a persistent pseudoaneurysm after stent graft placement, which was treated with in-stent balloon dilation. CONCLUSION Interventional treatment serves as a safe and effective treatment modality for inadvertent arterial injury related to blind, central venous access catheterisation in the upper thorax.
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Affiliation(s)
- S Park
- Department of Radiology, Gachon University Gil Medical Centre, 21, Namdong-daero 774beon-gil, Namdong-gu, Incheon, South Korea
| | - B Jeong
- Department of Radiology and Research Institute of Radiology, Asan Medical Centre, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, South Korea
| | - J H Shin
- Department of Radiology and Research Institute of Radiology, Asan Medical Centre, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, South Korea.
| | - J H Kim
- Department of Radiology, Gachon University Gil Medical Centre, 21, Namdong-daero 774beon-gil, Namdong-gu, Incheon, South Korea
| | - J W Kim
- Department of Radiology and Research Institute of Radiology, Asan Medical Centre, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, South Korea
| | - D I Gwon
- Department of Radiology and Research Institute of Radiology, Asan Medical Centre, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, South Korea
| | - G-Y Ko
- Department of Radiology and Research Institute of Radiology, Asan Medical Centre, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, South Korea
| | - C S Chen
- Department of Radiology, The Affiliated Cancer Hospital of Zhengzhou University, 1 Jianshe E Rd, Erqi Qu, Zhengzhou Shi, Henan Sheng, PR China
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15
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Lee Y, Park HC, Shin JH, Lim YH, Park JK, Shin J, Kim KS, Kim BK. P5298Influence of the changes in body fat on all-cause and cardiovascular mortality in a general population: a report from Ansan-Ansung cohort in the Korean genome environment study. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.0269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Paradoxical beneficial effects of obesity on all-cause and cardiovascular mortality have been reported in multiple cohort studies based on patients with cardiovascular disease as well as general populations. However, the association between the presence of obesity at baseline and the better survival rates could not be directly interpreted into the beneficial effect of gain in obesity or fatness on the mortality, which makes it difficult to provide any recommendation for the management of obesity. Therefore, we investigated the influence of the changes in body fat on all-cause and cardiovascular mortality in a general population.
Methods
A population-based cohort study has been conducted for 12 years (from 2001 to 2012). A total of 5,259 subjects in whom body compositions using a bio-impedance method were measured at least 2 times during the observational period were included. The causes of death was identified from the nation-wide database in KOSTAT. I20-I82 and R99 in the International Classification of Disease-10 codes were defined as a cardiovascular death. The subjects were evenly divided into 3 groups by the percentages of the changes in body fat (Δ%BF; decreased [Δ%BF <0.0%] vs. increased [Δ%BF 0.0–13.7%] vs. highly increased [Δ%BF ≥13.7%]). Inverse probability of treatment weighting was applied to balance the covariate differences among the groups.
Results
The age was 51.2±8.5 years and 51.6% was male. Median observation duration was 163 (the interquartile range: 157–168) months. The all-cause death and cardiovascular death occurred most frequently in the decreased Δ%BF group and least frequent in the highly increased Δ%BF group in both unweighted and weighted cohort. Multivariate Cox proportional hazard models showed that the risk of all-cause death was lower in the increased and highly increased Δ%BF groups (hazard ratio [HR] 0.61 [0.47–0.80] and 0.24 [0.17–0.34], respectively) and the risk of cardiovascular death was lower in the highly increased Δ%BF group (HR 0.20 [0.08–0.48]), compared to those in the decreased Δ%BF group after adjustment for all covariates including physical activities and the changes in muscle mass. The risk of all-cause death and cardiovascular death linearly decreased with increasing Δ%BF (HR 0.72 [0.67–0.77] and 0.70 [0.60–0.82], respectively).
Conclusion
The increase in body fat is associated with a lower risk of all-cause death and cardiovascular death in a middle-age general population, independently with physical activities and the changes in muscle mass.
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Affiliation(s)
- Y Lee
- Hanyang University Kuri Hospital, Department of cardiology, Guri, Korea (Republic of)
| | - H C Park
- Hanyang University Kuri Hospital, Department of cardiology, Guri, Korea (Republic of)
| | - J H Shin
- Hanyang University Kuri Hospital, Department of cardiology, Guri, Korea (Republic of)
| | - Y H Lim
- Hanyang University, Division of Cardiology, Department of internal medicine, Seoul, Korea (Republic of)
| | - J K Park
- Hanyang University, Division of Cardiology, Department of internal medicine, Seoul, Korea (Republic of)
| | - J Shin
- Hanyang University, Division of Cardiology, Department of internal medicine, Seoul, Korea (Republic of)
| | - K S Kim
- Hanyang University, Division of Cardiology, Department of internal medicine, Seoul, Korea (Republic of)
| | - B K Kim
- Sung Ae Hospital, Department of Cardiology, Seoul, Korea (Republic of)
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16
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Abstract
Abstract
Purpose
Patients with diabetes mellitus have an elevated risk of atrial fibrillation (AF). However, whether insulin resistance may elevate risk of AF incidence in non-diabetic is inconsistent. The aim of our study was to verify the association between insulin resistance and incidence of AF in non-diabetics.
Methods
We evaluated population-based cohorts embedded in the Korean Genome Epidemiology Study. Insulin resistance was expressed as Homeostasis Model Assessment for Insulin resistance (HOMA-IR). Baseline data including HOMA-IR and electrocardiography (ECG) were obtained at 2001. Subsequent biennial ECG was performed for identification of AF until 2016.
Results
Among the 8220 participants (46.8% male; median age 49 years), 25 participants had AF (0.3%) at baseline and 101 participants developed AF (1.2%) during follow up of 12 years. In multivariate Cox regression analysis, high HOMA-IR (≥1.4) was significantly associated with incident AF compared with low HOMA-IR (<1.40) (adjusted hazard ratio [HR] 1.9, 95% confidence interval [CI] 1.3–3.0). In subgroup analysis, these association was consistent regardless of obesity (BMI<25; adjust HR 1.8, 95% CI 1.1–3.0, BMI≥25; adjust HR 2.3, 95% CI 1.3–4.0)
Subgroup analysis
Conclusion
Based on prospective cohort study, insulin resistance (HOMA-IR) was associated with AF independently of obesity in non-diabetics.
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Affiliation(s)
- J K Park
- Hanyang University, Seoul, Korea (Republic of)
| | - J H Park
- Hanyang University, Seoul, Korea (Republic of)
| | - Y G Lee
- Hanyang University Kuri Hospital, Cardiology, Guri, Korea (Republic of)
| | - J H Shin
- Hanyang University Kuri Hospital, Cardiology, Guri, Korea (Republic of)
| | - Y H Lim
- Hanyang University, Seoul, Korea (Republic of)
| | - R Heo
- Hanyang University, Seoul, Korea (Republic of)
| | - J Shin
- Hanyang University, Seoul, Korea (Republic of)
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17
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Aniculaesei C, Pathak VB, Kim HT, Oh KH, Yoo BJ, Brunetti E, Jang YH, Hojbota CI, Shin JH, Jeon JH, Cho S, Cho MH, Sung JH, Lee SK, Hegelich BM, Nam CH. Electron energy increase in a laser wakefield accelerator using up-ramp plasma density profiles. Sci Rep 2019; 9:11249. [PMID: 31375722 PMCID: PMC6677811 DOI: 10.1038/s41598-019-47677-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 07/08/2019] [Indexed: 11/30/2022] Open
Abstract
The phase velocity of the wakefield of a laser wakefield accelerator can, theoretically, be manipulated by shaping the longitudinal plasma density profile, thus controlling the parameters of the generated electron beam. We present an experimental method where using a series of shaped longitudinal plasma density profiles we increased the mean electron peak energy more than 50%, from 175 ± 1 MeV to 262 ± 10 MeV and the maximum peak energy from 182 MeV to 363 MeV. The divergence follows closely the change of mean energy and decreases from 58.9 ± 0.45 mrad to 12.6 ± 1.2 mrad along the horizontal axis and from 35 ± 0.3 mrad to 8.3 ± 0.69 mrad along the vertical axis. Particle-in-cell simulations show that a ramp in a plasma density profile can affect the evolution of the wakefield, thus qualitatively confirming the experimental results. The presented method can increase the electron energy for a fixed laser power and at the same time offer an energy tunable source of electrons.
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Affiliation(s)
- Constantin Aniculaesei
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea.
| | - Vishwa Bandhu Pathak
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea
| | - Hyung Taek Kim
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea. .,Advanced Photonics Research Institute, Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, Republic of Korea.
| | - Kyung Hwan Oh
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea
| | - Byung Ju Yoo
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea
| | - Enrico Brunetti
- Scottish Universities Physics Alliance, University of Strathclyde, Department of Physics, Glasgow, G4 0NG, United Kingdom
| | - Yong Ha Jang
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea
| | - Calin Ioan Hojbota
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea.,Department of Physics and Photon Science, GIST, Gwangju, 61005, Republic of Korea
| | - Jung Hun Shin
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea
| | - Jong Ho Jeon
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea
| | - Seongha Cho
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea
| | - Myung Hoon Cho
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea
| | - Jae Hee Sung
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea.,Advanced Photonics Research Institute, Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, Republic of Korea
| | - Seong Ku Lee
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea.,Advanced Photonics Research Institute, Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, Republic of Korea
| | - Björn Manuel Hegelich
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea.,Department of Physics and Photon Science, GIST, Gwangju, 61005, Republic of Korea
| | - Chang Hee Nam
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Republic of Korea.,Department of Physics and Photon Science, GIST, Gwangju, 61005, Republic of Korea
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18
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Kim GJ, Kwon DW, Shin JH, Kim KW, Hong SC. Influence of the addition of vanadium to Pt/TiO 2 catalyst on the selective catalytic oxidation of NH 3 to N 2. Environ Technol 2019; 40:2588-2600. [PMID: 30513069 DOI: 10.1080/09593330.2018.1554004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Accepted: 11/25/2018] [Indexed: 06/09/2023]
Abstract
In this work, the effect of the addition of vanadium to the Pt/TiO2 catalyst on the selective catalytic oxidation (SCO) of NH3 to N2 was investigated. It was found that the addition of vanadium significantly enhanced catalytic activity at all tested temperatures. The Pt/V/TiO2 catalyst exhibited the highest NH3 conversion (∼100%) and NH3 to N2 conversion (∼81%) at 250°C. The physicochemical characteristics of the catalysts were investigated via Brunauer-Emmett-Teller (BET) analysis, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), NH3 temperature-programmed desorption (TPD), NH3 temperature-programmed oxidation (TPO), and in situ Fourier-transform infrared (FTIR) spectroscopy. It was found that the addition of V to the catalyst enhanced the conversion of NH3 as a result of the formation of new acid sites. The increase in the number of acid sites resulted in increased NH3 to N2 conversion via the internal selective catalytic reduction (i-SCR) mechanism. This mechanism involves the SCR of NOx, which are formed by the oxidation of NH3. Based on experimental results and analyses of the catalysts modified by the addition of V, it was shown that there was a close relation between reaction selectivity and the surface oxygen species of the catalyst and N2 yield. Furthermore, the addition of V increased the durability of SO2 by inhibiting the formation of ammonium bisulfate (ABS).
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Affiliation(s)
- Geo Jong Kim
- a Department of Environmental Energy Engineering, Graduate School of Kyonggi University , Gyeonggi-do , Republic of Korea
| | - Dong Wook Kwon
- b Materials Architecturing Research Center, Korea Institute of Science and Technology , Seoul , Republic of Korea
| | - Jung Hun Shin
- a Department of Environmental Energy Engineering, Graduate School of Kyonggi University , Gyeonggi-do , Republic of Korea
| | - Ki Wang Kim
- a Department of Environmental Energy Engineering, Graduate School of Kyonggi University , Gyeonggi-do , Republic of Korea
| | - Sung Chang Hong
- a Department of Environmental Energy Engineering, Graduate School of Kyonggi University , Gyeonggi-do , Republic of Korea
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19
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Song Y, Cho SH, Lee DW, Sheen JJ, Shin JH, Suh DC. Osseous versus Nonosseous Spinal Epidural Arteriovenous Fistulas: Experiences of 13 Patients. AJNR Am J Neuroradiol 2018; 40:129-134. [PMID: 30523143 DOI: 10.3174/ajnr.a5904] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Accepted: 10/12/2018] [Indexed: 02/05/2023]
Abstract
BACKGROUND AND PURPOSE Spinal epidural arteriovenous fistulas are rare vascular malformations. We present 13 patients with spinal epidural arteriovenous fistulas, noting the various presenting symptom patterns, imaging findings related to bone involvement, and outcomes. MATERIALS AND METHODS Among 111 patients with spinal vascular malformations in the institutional data base from 1993 to 2017, thirteen patients (11.7%) had spinal epidural arteriovenous fistulas. We evaluated presenting symptoms and imaging findings, including bone involvement and mode of treatment. To assess the treatment outcome, we compared initial and follow-up clinical status using the modified Aminoff and Logue Scale of Disability and the modified Rankin Scale. RESULTS The presenting symptoms were lower back pain (n = 2), radiculopathy (n = 5), and myelopathy (n = 7). There is overlap of symptoms in 1 patient (No. 11). Distribution of spinal epidural arteriovenous fistulas was cervical (n = 3), thoracic (n = 2), lumbar (n = 6), and sacral (n = 2). Intradural venous reflux was identified in 7 patients with congestive venous myelopathy. The fistulas were successfully treated in all patients who underwent treatment (endovascular embolization, n = 10; operation, n = 1) except 2 patients who refused treatment due to tolerable symptoms. Transarterial glue (n = 7) was used in nonosseous types; and transvenous coils (n = 3), in osseous type. After 19 months of median follow-up, the patients showed symptom improvement after treatment. CONCLUSIONS Although presenting symptoms were diverse, myelopathy caused by intradural venous reflux was the main target of treatment. Endovascular treatment was considered via an arterial approach in nonosseous types and via a venous approach in osseous types.
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Affiliation(s)
- Y Song
- From the Departments of Radiology and Research Institute of Radiology (Y.S., D.W.L., J.J.S., J.H.S., D.C.S.), University of Ulsan, College of Medicine, Asan Medical Center, Seoul, Republic of Korea
| | - S H Cho
- Department of Neurosurgery (S.H.C.), Ulsan University College of Medicine, Asan Hospital, Gang-reung, Republic of Korea
| | - D W Lee
- From the Departments of Radiology and Research Institute of Radiology (Y.S., D.W.L., J.J.S., J.H.S., D.C.S.), University of Ulsan, College of Medicine, Asan Medical Center, Seoul, Republic of Korea
| | - J J Sheen
- From the Departments of Radiology and Research Institute of Radiology (Y.S., D.W.L., J.J.S., J.H.S., D.C.S.), University of Ulsan, College of Medicine, Asan Medical Center, Seoul, Republic of Korea
| | - J H Shin
- From the Departments of Radiology and Research Institute of Radiology (Y.S., D.W.L., J.J.S., J.H.S., D.C.S.), University of Ulsan, College of Medicine, Asan Medical Center, Seoul, Republic of Korea
| | - D C Suh
- From the Departments of Radiology and Research Institute of Radiology (Y.S., D.W.L., J.J.S., J.H.S., D.C.S.), University of Ulsan, College of Medicine, Asan Medical Center, Seoul, Republic of Korea
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Park JK, Choi YW, Kim BS, Chang KS, Lee YG, Shin JH, Lim YH, Park HC, Shin J. P1880Independent effect of physical activity and resting heart rate on incidence of atrial fibrillation in general population. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p1880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- J K Park
- Hanyang University, Seoul, Korea Republic of
| | - Y W Choi
- Hanyang University, Seoul, Korea Republic of
| | - B S Kim
- Hanyang University, Seoul, Korea Republic of
| | - K S Chang
- Hanyang University, Seoul, Korea Republic of
| | - Y G Lee
- Hanyang University Kuri Hospital, Cardiology, Guri, Korea Republic of
| | - J H Shin
- Hanyang University Kuri Hospital, Cardiology, Guri, Korea Republic of
| | - Y H Lim
- Hanyang University, Seoul, Korea Republic of
| | - H C Park
- Hanyang University Kuri Hospital, Cardiology, Guri, Korea Republic of
| | - J Shin
- Hanyang University, Seoul, Korea Republic of
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21
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Lee JH, Yoon MH, Tahk SJ, Shin JH, Hwang GS, Choi SY, Choi BJ, Lim HS, Yang HM, Park JS, Seo KW. P3492Nonagenarians with acute myocardial infarction; invasive versus conservative strategy. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p3492] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- J H Lee
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - M H Yoon
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - S J Tahk
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - J H Shin
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - G S Hwang
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - S Y Choi
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - B J Choi
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - H S Lim
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - H M Yang
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - J S Park
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - K W Seo
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
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22
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Lee Y, Park JK, Lim YH, Shin JH, Park HC, Shin J, Kim KS. 5047C-reactive protein and the risk of atrial fibrillation: KOGES 12 years' follow-up study. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.5047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Y Lee
- Hanyang University, Seoul, Korea Republic of
| | - J K Park
- Hanyang University, Seoul, Korea Republic of
| | - Y H Lim
- Hanyang University, Seoul, Korea Republic of
| | - J H Shin
- Hanyang University, Seoul, Korea Republic of
| | - H C Park
- Hanyang University, Seoul, Korea Republic of
| | - J Shin
- Hanyang University, Seoul, Korea Republic of
| | - K S Kim
- Hanyang University, Seoul, Korea Republic of
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23
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Lee JH, Yoon MH, Tahk SJ, Shin JH, Hwang GS, Choi SY, Choi BJ, Lim HS, Yang HM, Park JS, Seo KW. P2627Comparision of 3-dimensional quantitative coronary angiography and intravascular ultrasound for detecting functionally significant coronary lesions. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p2627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- J H Lee
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - M H Yoon
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - S J Tahk
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - J H Shin
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - G S Hwang
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - S Y Choi
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - B J Choi
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - H S Lim
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - H M Yang
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - J S Park
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - K W Seo
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
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24
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Lee JH, Yoon MH, Tahk SJ, Shin JH, Hwang GS, Choi SY, Choi BJ, Lim HS, Yang HM, Park JS, Seo KW. P794Comparision of efficacy and safety of 3-month dual antiplatelet therapy(DAPT) versus 6-month DAPT following Coroflex ISAR sirolimus-eluting stent(C-SES) implantation. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy564.p794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- J H Lee
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - M H Yoon
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - S J Tahk
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - J H Shin
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - G S Hwang
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - S Y Choi
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - B J Choi
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - H S Lim
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - H M Yang
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - J S Park
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
| | - K W Seo
- Ajou University Hospital, Cardiology, Suwon, Korea Republic of
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25
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Seo KW, Yoon MH, Tahk SJ, Shin JH, Hwang GS, Choi SY, Choi BJ, Lim HS, Yang HM, Park JS, Lee JH. P4626Clinical outcome of fractional flow reserve-guided deferred lesions in patients with acute coronary syndrome versus stable angina. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p4626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- K W Seo
- Ajou University School of Medicine, Suwon, Korea Republic of
| | - M H Yoon
- Ajou University School of Medicine, Suwon, Korea Republic of
| | - S J Tahk
- Ajou University School of Medicine, Suwon, Korea Republic of
| | - J H Shin
- Ajou University School of Medicine, Suwon, Korea Republic of
| | - G S Hwang
- Ajou University School of Medicine, Suwon, Korea Republic of
| | - S Y Choi
- Ajou University School of Medicine, Suwon, Korea Republic of
| | - B J Choi
- Ajou University School of Medicine, Suwon, Korea Republic of
| | - H S Lim
- Ajou University School of Medicine, Suwon, Korea Republic of
| | - H M Yang
- Ajou University School of Medicine, Suwon, Korea Republic of
| | - J S Park
- Ajou University School of Medicine, Suwon, Korea Republic of
| | - J H Lee
- Ajou University School of Medicine, Suwon, Korea Republic of
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26
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Lee NJ, Shin JH, Lee SS, Park DH, Lee SK, Yoon HK. Transcatheter arterial embolization for iatrogenic bleeding after endoscopic ultrasound-guided pancreaticobiliary drainage. Diagn Interv Imaging 2018; 99:717-724. [PMID: 30033142 DOI: 10.1016/j.diii.2018.06.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 06/26/2018] [Accepted: 06/28/2018] [Indexed: 12/11/2022]
Abstract
PURPOSE The purpose of this study was to report the incidence of massive bleeding after endoscopic ultrasound-guided transmural pancreaticobiliary drainage (EUS-TPBD) and the clinical outcomes in patients with this condition treated with transcatheter arterial embolization (TAE). PATIENTS AND METHODS We performed a 9-year retrospective analysis of 797 EUS-TPBD procedures (excluding gallbladder or pseudocysts) in 729 patients. Among them, twelve (12/729, 1.65%) patients were referred for TAE to manage active bleeding adjacent to the TPBD sites. There were 8 men and 4 women with a mean age of 66.1 years±13.4 (SD) (range: 45-89 years). The clinical and procedure data of these 12 patients were reviewed. RESULTS Thirteen TAE procedures in 12 patients were performed. The bleeding sites were the left hepatic artery (n=7), the right hepatic artery (n=3), the left gastric artery (n=1), the left accessory gastric artery (n=1) and gastroduodenal artery (n=1). TAE was performed with gelatin sponge particles (n=1), coil (n=1) and n-butyl-2 cyanoacrylate with/without coils (n=11), with technical and clinical success rates of 100% (13/13) and 85% (11/13), respectively. Re-bleeding following embolization with gelatin sponge particles occurred in one patient. Procedure-related ischemic hepatitis was observed in another patient with pancreatic cancer with portal vein involvement. CONCLUSION On the basis of our results, TAE using n-butyl-2 cyanoacrylate seems safe and effective for the treatment of bleeding after EUS-TPBD procedures. When the portal vein is compromised, TAE of the hepatic artery can cause ischemic liver damage.
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Affiliation(s)
- N J Lee
- Department of Radiology, University of Ulsan College of Medicine, Asan Medical Center, 88, Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Republic of Korea
| | - J H Shin
- Department of Radiology, University of Ulsan College of Medicine, Asan Medical Center, 88, Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Republic of Korea.
| | - S S Lee
- Department of Gastroenterology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea
| | - D H Park
- Department of Gastroenterology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea
| | - S K Lee
- Department of Gastroenterology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea
| | - H-K Yoon
- Department of Radiology, University of Ulsan College of Medicine, Asan Medical Center, 88, Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Republic of Korea
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27
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Park DJ, Shin JH, Park KH, Ryu HC. Electrically controllable THz asymmetric split-loop resonator with an outer square loop based on VO 2. Opt Express 2018; 26:17397-17406. [PMID: 30119551 DOI: 10.1364/oe.26.017397] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 06/18/2018] [Indexed: 06/08/2023]
Abstract
In this paper, we propose an asymmetric split-loop resonator with an outer square loop (ASLR-OSL) based on vanadium dioxide (VO2) which can actively control the transmission characteristics of a terahertz wave while maintaining a high quality factor of the asymmetric split-loop resonator (ASLR) by adding an outer square loop. The proposed ASLR-OSL demonstrated transmission characteristics similar to those of ASLR, and the transmission characteristics of ASLR-OSL were successfully controlled by directly applying a bias voltage. These results show a simple method for imposing active properties on a common metamaterial having a high quality factor by adding a loop structure.
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28
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Choi W, Shin JH, Kim PH, Han K, Ohm JY, Kim JH, Kim JW. Clinical outcomes of 23 patients who had repeat pelvic arterial embolisation for uncontrolled post-partum haemorrhage at a single centre. Clin Radiol 2018; 73:665-671. [PMID: 29622362 DOI: 10.1016/j.crad.2018.02.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Accepted: 02/13/2018] [Indexed: 01/23/2023]
Abstract
AIM To evaluate the safety and efficacy of repeated pelvic arterial embolisation (PAE) for uncontrolled postpartum haemorrhage (PPH) after a single session of PAE and to compare angiographic findings between the two sessions of PAE. MATERIALS AND METHODS A total of 23 consecutive patients (age range, 23-44 years) who underwent repeated PAE for uncontrolled PPH between March 2001 and January 2016 in Severance Hospital were reviewed. The interval times between the two sessions of PAE, the angiographic findings, embolic materials, arteries embolised during PAE, and the clinical outcomes were reviewed retrospectively. RESULTS Overall clinical success was achieved after repeated PAE in 21 of 23 patients (91.3%). There were no procedure-related, major complications. On angiography, active bleeding from the uterine collateral arteries was more frequently observed in the second session of PAE (p>0.05), and embolisation of the anterior division of the internal iliac artery was significantly higher during the second session of PAE. Use of permanent embolic materials was significantly higher during the second session of PAE. Recanalisation of a previously embolised artery was identified in 14 patients (60.9%) during the second session. CONCLUSION Repeated PAE is safe and effective for managing recurrent bleeding after a single session of PAE. Repeated PAE is related to a higher chance of embolisation of the anterior division of the internal iliac artery, with the use of permanent embolic materials. Recanalisation of a previously embolised artery seems to be a principal source of rebleeding during a repeated session of PAE.
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Affiliation(s)
- W Choi
- Department of Radiology, Severance Hospital, Research Institute of Radiological Science, Yonsei University, College of Medicine, 50-1, Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - J H Shin
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 138-736, Republic of Korea.
| | - P H Kim
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 138-736, Republic of Korea
| | - K Han
- Department of Radiology, Severance Hospital, Research Institute of Radiological Science, Yonsei University, College of Medicine, 50-1, Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - J Y Ohm
- Department of Radiology, Chungnam National University Hospital, 282, Munhwa-ro, Jung-gu, Daejeon, 35015, Republic of Korea
| | - J H Kim
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 138-736, Republic of Korea
| | - J W Kim
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 138-736, Republic of Korea
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29
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Lee GD, Shin JH, Choi IH. Growth Performance and Fatty Acid Profiles of Ducks Fed a Diet Supplemented with Aronia (Aronia Melanocarpa) Powder. Braz J Poult Sci 2018. [DOI: 10.1590/1806-9061-2016-0445] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- GD Lee
- Joongbu University, South Korea
| | - JH Shin
- Joongbu University, South Korea
| | - IH Choi
- Joongbu University, South Korea
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30
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Kwon MR, Shin JH, Hahn SY, Oh YL, Kwak JY, Lee E, Lim Y. Histogram analysis of greyscale sonograms to differentiate between the subtypes of follicular variant of papillary thyroid cancer. Clin Radiol 2018; 73:591.e1-591.e7. [PMID: 29317047 DOI: 10.1016/j.crad.2017.12.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 11/27/2017] [Indexed: 11/26/2022]
Abstract
AIM To evaluate the diagnostic value of histogram analysis using ultrasound (US) to differentiate between the subtypes of follicular variant of papillary thyroid carcinoma (FVPTC). MATERIALS AND METHODS The present study included 151 patients with surgically confirmed FVPTC diagnosed between January 2014 and May 2016. Their preoperative US features were reviewed retrospectively. Histogram parameters (mean, maximum, minimum, range, root mean square, skewness, kurtosis, energy, entropy, and correlation) were obtained for each nodule. RESULTS The 152 nodules in 151 patients comprised 48 non-invasive follicular thyroid neoplasm with papillary-like nuclear features (NIFTPs; 31.6%), 60 invasive encapsulated FVPTCs (EFVPTCs; 39.5%), and 44 infiltrative FVPTCs (28.9%). The US features differed significantly between the subtypes of FVPTC. Discrimination was achieved between NIFTPs and infiltrative FVPTC, and between invasive EFVPTC and infiltrative FVPTC using histogram parameters; however, the parameters were not significantly different between NIFTP and invasive EFVPTC. CONCLUSION It is feasible to use greyscale histogram analysis to differentiate between NIFTP and infiltrative FVPTC, but not between NIFTP and invasive EFVPTC. Histograms can be used as a supplementary tool to differentiate the subtypes of FVPTC.
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Affiliation(s)
- M-R Kwon
- Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - J H Shin
- Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea.
| | - S Y Hahn
- Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - Y L Oh
- Department of Pathology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - J Y Kwak
- Department of Radiology, Severance Hospital, Research Institute of Radiological Science, Yonsei University College of Medicine, Seoul, South Korea
| | - E Lee
- Department of Computational Science and Engineering, Yonsei University, Seoul, South Korea
| | - Y Lim
- Department of Applied Statistics, Chung-Ang University, 221, Heukseok-dong, Dongjak-gu, Seoul 156-756, South Korea
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31
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Skirzewski M, Karavanova I, Shamir A, Erben L, Garcia-Olivares J, Shin JH, Vullhorst D, Alvarez VA, Amara SG, Buonanno A. ErbB4 signaling in dopaminergic axonal projections increases extracellular dopamine levels and regulates spatial/working memory behaviors. Mol Psychiatry 2018; 23:2227-2237. [PMID: 28727685 PMCID: PMC5775946 DOI: 10.1038/mp.2017.132] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Revised: 03/13/2017] [Accepted: 04/04/2017] [Indexed: 02/07/2023]
Abstract
Genetic variants of Neuregulin 1 (NRG1) and its neuronal tyrosine kinase receptor ErbB4 are associated with risk for schizophrenia, a neurodevelopmental disorder characterized by excitatory/inhibitory imbalance and dopamine (DA) dysfunction. To date, most ErbB4 studies have focused on GABAergic interneurons in the hippocampus and neocortex, particularly fast-spiking parvalbumin-positive (PV+) basket cells. However, NRG has also been shown to modulate DA levels, suggesting a role for ErbB4 signaling in dopaminergic neuron function. Here we report that ErbB4 in midbrain DAergic axonal projections regulates extracellular DA levels and relevant behaviors. Mice lacking ErbB4 in tyrosine hydroxylase-positive (TH+) neurons, but not in PV+ GABAergic interneurons, exhibit different regional imbalances of basal DA levels and fail to increase DA in response to local NRG1 infusion into the dorsal hippocampus, medial prefrontal cortex and dorsal striatum measured by reverse microdialysis. Using Lund Human Mesencephalic (LUHMES) cells, we show that NRG/ErbB signaling increases extracellular DA levels, at least in part, by reducing DA transporter (DAT)-dependent uptake. Interestingly, TH-Cre;ErbB4f/f mice manifest deficits in learning, spatial and working memory-related behaviors, but not in numerous other behaviors altered in PV-Cre;ErbB4f/f mice. Importantly, microinjection of a Cre-inducible ErbB4 virus (AAV-ErbB4.DIO) into the mesencephalon of TH-Cre;ErbB4f/f mice, which selectively restores ErbB4 expression in DAergic neurons, rescues DA dysfunction and ameliorates behavioral deficits. Our results indicate that direct NRG/ErbB4 signaling in DAergic axonal projections modulates DA homeostasis, and that NRG/ErbB4 signaling in both GABAergic interneurons and DA neurons contribute to the modulation of behaviors relevant to psychiatric disorders.
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Affiliation(s)
- M Skirzewski
- 0000 0001 2297 5165grid.94365.3dSection on Molecular Neurobiology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD USA
| | - I Karavanova
- 0000 0001 2297 5165grid.94365.3dSection on Molecular Neurobiology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD USA
| | - A Shamir
- 0000 0001 2297 5165grid.94365.3dSection on Molecular Neurobiology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD USA
| | - L Erben
- 0000 0001 2297 5165grid.94365.3dSection on Molecular Neurobiology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD USA ,0000 0001 2240 3300grid.10388.32Institute of Molecular Psychiatry, University of Bonn, Bonn, Germany
| | - J Garcia-Olivares
- 0000 0001 2297 5165grid.94365.3dLaboratory of Molecular and Cellular Neurobiology, National Institute of Mental Health, National Institutes of Health, Bethesda, MD USA
| | - J H Shin
- 0000 0001 2297 5165grid.94365.3dLaboratory for Integrative Neuroscience, Section on Neuronal Structure, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD USA
| | - D Vullhorst
- 0000 0001 2297 5165grid.94365.3dSection on Molecular Neurobiology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD USA
| | - V A Alvarez
- 0000 0001 2297 5165grid.94365.3dLaboratory for Integrative Neuroscience, Section on Neuronal Structure, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD USA
| | - S G Amara
- 0000 0001 2297 5165grid.94365.3dLaboratory of Molecular and Cellular Neurobiology, National Institute of Mental Health, National Institutes of Health, Bethesda, MD USA
| | - A Buonanno
- Section on Molecular Neurobiology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA.
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32
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Kim HT, Pathak VB, Hong Pae K, Lifschitz A, Sylla F, Shin JH, Hojbota C, Lee SK, Sung JH, Lee HW, Guillaume E, Thaury C, Nakajima K, Vieira J, Silva LO, Malka V, Nam CH. Stable multi-GeV electron accelerator driven by waveform-controlled PW laser pulses. Sci Rep 2017; 7:10203. [PMID: 28860579 PMCID: PMC5579019 DOI: 10.1038/s41598-017-09267-1] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 07/18/2017] [Indexed: 12/04/2022] Open
Abstract
The achievable energy and the stability of accelerated electron beams have been the most critical issues in laser wakefield acceleration. As laser propagation, plasma wave formation and electron acceleration are highly nonlinear processes, the laser wakefield acceleration (LWFA) is extremely sensitive to initial experimental conditions. We propose a simple and elegant waveform control method for the LWFA process to enhance the performance of a laser electron accelerator by applying a fully optical and programmable technique to control the chirp of PW laser pulses. We found sensitive dependence of energy and stability of electron beams on the spectral phase of laser pulses and obtained stable 2-GeV electron beams from a 1-cm gas cell of helium. The waveform control technique for LWFA would prompt practical applications of centimeter-scale GeV-electron accelerators to a compact radiation sources in the x-ray and γ-ray regions.
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Affiliation(s)
- Hyung Taek Kim
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Korea.,Advanced Photonics Research Institute, GIST, Gwangju, 61005, Korea
| | - V B Pathak
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Korea
| | - Ki Hong Pae
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Korea.,Advanced Photonics Research Institute, GIST, Gwangju, 61005, Korea
| | - A Lifschitz
- Laboratoire d'Optique Appliquée (LOA), ENSTA ParisTech, CNRS UMR7639, École Polytechnique, Université Paris-Saclay, 828 Boulevard des Maréchaux, 91762, Palaiseau, France
| | - F Sylla
- SourceLAB SAS, 86 rue de Paris, 91400, Orsay, France
| | - Jung Hun Shin
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Korea
| | - C Hojbota
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Korea.,Departement of Physics and Photon Science, GIST, Gwangju, 61005, Korea
| | - Seong Ku Lee
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Korea.,Advanced Photonics Research Institute, GIST, Gwangju, 61005, Korea
| | - Jae Hee Sung
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Korea.,Advanced Photonics Research Institute, GIST, Gwangju, 61005, Korea
| | - Hwang Woon Lee
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Korea
| | - E Guillaume
- Laboratoire d'Optique Appliquée (LOA), ENSTA ParisTech, CNRS UMR7639, École Polytechnique, Université Paris-Saclay, 828 Boulevard des Maréchaux, 91762, Palaiseau, France
| | - C Thaury
- Laboratoire d'Optique Appliquée (LOA), ENSTA ParisTech, CNRS UMR7639, École Polytechnique, Université Paris-Saclay, 828 Boulevard des Maréchaux, 91762, Palaiseau, France
| | - Kazuhisa Nakajima
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Korea
| | - J Vieira
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - L O Silva
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
| | - V Malka
- Laboratoire d'Optique Appliquée (LOA), ENSTA ParisTech, CNRS UMR7639, École Polytechnique, Université Paris-Saclay, 828 Boulevard des Maréchaux, 91762, Palaiseau, France. .,Weizmann Institue for Science, P.O. Box 26, Rehovot, 76100, Israel.
| | - Chang Hee Nam
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, Korea. .,Departement of Physics and Photon Science, GIST, Gwangju, 61005, Korea.
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Ko HM, Joo SH, Jo JH, Park WS, Jung WY, Shin JH, Ahn HJ. Liver-Wrapping, Nitric Oxide-Releasing Nanofiber Downregulates Cleaved Caspase-3 and Bax Expression on Rat Hepatic Ischemia-Reperfusion Injury. Transplant Proc 2017; 49:1170-1174. [PMID: 28583550 DOI: 10.1016/j.transproceed.2017.03.054] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Hepatic ischemia-reperfusion injury (IRI) is an important determinant of the outcome of hepatic surgery, including re-section and transplantation. Previous studies have shown that nitric oxide (NO) has a protective effect against IRI. Therefore, many studies have examined methods for supplying NO. In this study, we investigated the effect of NO-releasing nanofibers on hepatic IRI in a rat model. METHODS Male Sprague-Dawley rats were divided into 4 groups: control, IRI only (n = 3); group 1, hepatic IRI and liver-wrapping with nanofiber lacking NO (n = 4); group 2, hepatic IRI and liver-wrapping with NO rapid-releasing nanofiber (n = 4); and group 3, hepatic IRI and liver-wrapping with NO slow-releasing nanofiber (n = 5). RESULTS The levels of aspartate aminotransferase and alanine aminotransferase were not significantly different between groups. On the basis of Western blots, Bax/β-actin levels were significantly lower in group 2 than in group 3 (P < .01). Cleaved Caspase-3/β-actin levels were significantly lower in group 2 than in the control, group 1, and group 3 (P < .05, .01, and .01, respectively). However, there were no significant differences in Bcl-2/β-actin between groups. CONCLUSIONS The liver-wrapping NO rapid-releasing nanofiber downregulated cleaved Caspase-3 and Bax expression. It has a protective effect by reducing apoptosis in hepatic IRI in rats.
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Affiliation(s)
- H M Ko
- Department of Surgery, College of Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - S H Joo
- Department of Surgery, College of Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - J H Jo
- Department of Surgery, College of Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - W S Park
- Department of Surgery, College of Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - W Y Jung
- Department of Chemistry, College of Natural Science, Kwangwoon University, Seoul, Republic of Korea
| | - J H Shin
- Department of Chemistry, College of Natural Science, Kwangwoon University, Seoul, Republic of Korea
| | - H J Ahn
- Department of Surgery, College of Medicine, Kyung Hee University, Seoul, Republic of Korea.
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Wright C, Shin JH, Rajpurohit A, Deep-Soboslay A, Collado-Torres L, Brandon NJ, Hyde TM, Kleinman JE, Jaffe AE, Cross AJ, Weinberger DR. Altered expression of histamine signaling genes in autism spectrum disorder. Transl Psychiatry 2017; 7:e1126. [PMID: 28485729 PMCID: PMC5534955 DOI: 10.1038/tp.2017.87] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 03/17/2017] [Accepted: 03/21/2017] [Indexed: 12/18/2022] Open
Abstract
The histaminergic system (HS) has a critical role in cognition, sleep and other behaviors. Although not well studied in autism spectrum disorder (ASD), the HS is implicated in many neurological disorders, some of which share comorbidity with ASD, including Tourette syndrome (TS). Preliminary studies suggest that antagonism of histamine receptors 1-3 reduces symptoms and specific behaviors in ASD patients and relevant animal models. In addition, the HS mediates neuroinflammation, which may be heightened in ASD. Together, this suggests that the HS may also be altered in ASD. Using RNA sequencing (RNA-seq), we investigated genome-wide expression, as well as a focused gene set analysis of key HS genes (HDC, HNMT, HRH1, HRH2, HRH3 and HRH4) in postmortem dorsolateral prefrontal cortex (DLPFC) initially in 13 subjects with ASD and 39 matched controls. At the genome level, eight transcripts were differentially expressed (false discovery rate <0.05), six of which were small nucleolar RNAs (snoRNAs). There was no significant diagnosis effect on any of the individual HS genes but expression of the gene set of HNMT, HRH1, HRH2 and HRH3 was significantly altered. Curated HS gene sets were also significantly differentially expressed. Differential expression analysis of these gene sets in an independent RNA-seq ASD data set from DLPFC of 47 additional subjects confirmed these findings. Understanding the physiological relevance of an altered HS may suggest new therapeutic options for the treatment of ASD.
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Affiliation(s)
- C Wright
- Lieber Institute for Brain Development, Clinical Sciences, Johns Hopkins School of Medicine, Baltimore, MD, USA,AstraZeneca Postdoc Program, Innovative Medicines and Early Development, Waltham, MA, USA
| | - J H Shin
- Lieber Institute for Brain Development, Clinical Sciences, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - A Rajpurohit
- Lieber Institute for Brain Development, Clinical Sciences, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - A Deep-Soboslay
- Lieber Institute for Brain Development, Clinical Sciences, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - L Collado-Torres
- Lieber Institute for Brain Development, Clinical Sciences, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - N J Brandon
- AstraZeneca Neuroscience, Innovative Medicines and Early Development, Waltham, MA, USA
| | - T M Hyde
- Lieber Institute for Brain Development, Clinical Sciences, Johns Hopkins School of Medicine, Baltimore, MD, USA,Department of Psychiatry and Behavioral Sciences, Johns Hopkins School of Medicine, Baltimore, MD, USA,Department of Neurology, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - J E Kleinman
- Lieber Institute for Brain Development, Clinical Sciences, Johns Hopkins School of Medicine, Baltimore, MD, USA,Department of Psychiatry and Behavioral Sciences, Johns Hopkins School of Medicine, Baltimore, MD, USA
| | - A E Jaffe
- Lieber Institute for Brain Development, Clinical Sciences, Johns Hopkins School of Medicine, Baltimore, MD, USA,Department of Biostatistics, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA,Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - A J Cross
- AstraZeneca Neuroscience, Innovative Medicines and Early Development, Waltham, MA, USA
| | - D R Weinberger
- Lieber Institute for Brain Development, Clinical Sciences, Johns Hopkins School of Medicine, Baltimore, MD, USA,Department of Psychiatry and Behavioral Sciences, Johns Hopkins School of Medicine, Baltimore, MD, USA,Department of Neurology, Johns Hopkins School of Medicine, Baltimore, MD, USA,The Solomon H. Snyder Department of Neuroscience, Johns Hopkins School of Medicine, Baltimore, MD, USA,McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA,Lieber Institute for Brain Development, Clinical Sciences, Johns Hopkins School of Medicine, Johns Hopkins Medical Campus, 855 North Wolfe Street, Suite 300, 3rd Floor, Baltimore, MD 21205, USA. E-mail:
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Hahn SY, Shin JH, Oh YL. What Is the Ideal Core Number for Ultrasonography-Guided Thyroid Biopsy of Cytologically Inconclusive Nodules? AJNR Am J Neuroradiol 2017; 38:777-781. [PMID: 28154123 DOI: 10.3174/ajnr.a5075] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 11/19/2016] [Indexed: 01/21/2023]
Abstract
BACKGROUND AND PURPOSE Core needle biopsy of the thyroid under ultrasonographic guidance provides a larger tissue sample and may facilitate a more precise histologic diagnosis, reducing the need for repetitive fine-needle aspiration or a diagnostic operation. However, there is no consensus regarding the ideal number of specimens to be obtained for ultrasonography-guided core needle biopsy. The aim of this study was to decide the ideal core number for ultrasonography-guided core needle biopsy of cytologically inconclusive nodules. MATERIALS AND METHODS Sixty consecutive biopsies were performed in 60 thyroid nodules with Bethesda Category I or III cytology. Three biopsy cores were obtained for each thyroid nodule. The first biopsy specimens were taken from the nodule, while the second and third specimens obtained included the nodular tissue, nodular capsule, and surrounding parenchyma. Diagnostic ability was evaluated according to the following: protocol A, first specimen; protocol B, first and second specimens; and protocol C, all specimens. The McNemar test was used for statistical analysis. RESULTS Of the 60 nodules, diagnostic ability was achieved in 41 nodules (68%) with protocol A, in 56 nodules (93%) with protocol B, and in 58 nodules (97%) with protocol C. The diagnostic ability of protocols B and C was significantly higher than that of protocol A (all P values < .001). However, the diagnostic ability of protocol B was not significantly different from that of protocol C. CONCLUSIONS Ultrasonography-guided core needle biopsy for cytologically inconclusive thyroid nodules should obtain at least 2 core specimens with intranodular and capsule targets.
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Affiliation(s)
- S Y Hahn
- From the Department of Radiology and Center for Imaging Science (S.Y.H., J.H.S.)
| | - J H Shin
- From the Department of Radiology and Center for Imaging Science (S.Y.H., J.H.S.)
| | - Y L Oh
- Department of Pathology (Y.L.O.), Thyroid Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
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Jin Z, Zhuo HB, Nakazawa T, Shin JH, Wakamatsu S, Yugami N, Hosokai T, Zou DB, Yu MY, Sheng ZM, Kodama R. Highly efficient terahertz radiation from a thin foil irradiated by a high-contrast laser pulse. Phys Rev E 2016; 94:033206. [PMID: 27739720 DOI: 10.1103/physreve.94.033206] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Indexed: 11/07/2022]
Abstract
Radially polarized intense terahertz (THz) radiation behind a thin foil irradiated by ultrahigh-contrast ultrashort relativistic laser pulse is recorded by a single-shot THz time-domain spectroscopy system. As the thickness of the target is reduced from 30 to 2 µm, the duration of the THz emission increases from 5 to over 20 ps and the radiation energy increases dramatically, reaching ∼10.5mJ per pulse, corresponding to a laser-to-THz radiation energy conversion efficiency of 1.7%. The efficient THz emission can be attributed to reflection (deceleration and acceleration) of the laser-driven hot electrons by the target-rear sheath electric field. The experimental results are consistent with that of a simple model as well as particle-in-cell simulation.
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Affiliation(s)
- Z Jin
- Photon Pioneers Center, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - H B Zhuo
- College of Science, National University of Defense Technology, Changsha 410073, People's Republic of China.,Collaborative Innovation Center of IFSA, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - T Nakazawa
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - J H Shin
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - S Wakamatsu
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - N Yugami
- Department of Advanced Interdisciplinary Sciences, Center for Optical Research & Education, and Optical Technology Innovation Center, Utsunomiya University, Yoto 7-1-2, Utsunomiya, Tochigi, 321-8585, Japan
| | - T Hosokai
- Photon Pioneers Center, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - D B Zou
- College of Science, National University of Defense Technology, Changsha 410073, People's Republic of China
| | - M Y Yu
- Institute for Fusion Theory and Simulation and Department of Physics, Zhejiang University, Hangzhou 310027, People's Republic of China and Institute of Theoretical Physics I, Ruhr University, D-44780 Bochum, Germany
| | - Z M Sheng
- Collaborative Innovation Center of IFSA, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China.,SUPA, Department of Physics, University of Strathclyde, Glasgow G0 4NG, United Kingdom.,Key Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - R Kodama
- Photon Pioneers Center, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan.,Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan.,Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
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Ko Y, Lee HK, Lee YS, Kim MY, Shin JH, Shim EJ, Park SY, Mo EK, Park YB. Accuracy of Xpert(®) MTB/RIF assay compared with AdvanSure™ TB/NTM real-time PCR using bronchoscopy specimens. Int J Tuberc Lung Dis 2016; 20:115-20. [PMID: 26688537 DOI: 10.5588/ijtld.15.0227] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The performance of Xpert(®) MTB/RIF assay, an automated nucleic acid amplification test (NAAT) that was developed for the detection of tuberculosis (TB), has been evaluated in various clinical settings. However, few studies have compared Xpert with other NAATs, especially its performance using lower respiratory tract specimens (LRTS). OBJECTIVE To compare the practical diagnostic performance of the Xpert assay with that of the AdvanSure™ TB/NTM RT-PCR kit in the detection of pulmonary TB (PTB), using LRTS obtained through bronchoscopy. RESULTS Of 249 patients included, 105 had culture-confirmed PTB. Using culture as reference, the overall sensitivity of Xpert and AdvanSure was respectively 92.4% and 83.8%. When acid-fast bacilli smear results were taken into consideration, the sensitivity of Xpert for smear-positive and smear-negative LRTS was respectively 100% and 88.9%, while that of the AdvanSure was 100% and 76.4%. Xpert showed better results than AdvanSure in terms of sensitivity in smear-negative LRTS (P = 0.012), but no difference in smear-positive LRTS. CONCLUSIONS Xpert may be advantageous in the detection of PTB using LRTS, particularly in low microbiological burden settings.
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Affiliation(s)
- Y Ko
- Department of Pulmonary and Critical Care Medicine, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Republic of Korea; Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Busan Paik Hospital, Inje University College of Medicine, Busan, Republic of Korea
| | - H-K Lee
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Busan Paik Hospital, Inje University College of Medicine, Busan, Republic of Korea
| | - Y S Lee
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Busan Paik Hospital, Inje University College of Medicine, Busan, Republic of Korea; Division of Pulmonology, Department of Internal Medicine, Institute of Chest Disease, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - M-Y Kim
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Busan Paik Hospital, Inje University College of Medicine, Busan, Republic of Korea
| | - J H Shin
- Department of Laboratory Medicine, Busan Paik Hospital, Inje University College of Medicine, Busan, Republic of Korea
| | - E-J Shim
- Department of Pharmacology and PharmacoGenomics Research Center, Inje University College of Medicine, Inje, Republic of Korea
| | - S Y Park
- Department of Pulmonary and Critical Care Medicine, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Republic of Korea
| | - E K Mo
- Department of Pulmonary and Critical Care Medicine, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Republic of Korea
| | - Y B Park
- Department of Pulmonary and Critical Care Medicine, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Republic of Korea
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Kim MJ, Shin JH, Park JH, Kim JH, Song HY, Park J, Cho YC, Kim SH. Covered airway stent placement for malignant tracheobronchial strictures in patients with an endotracheal tube. Clin Radiol 2016; 71:1120-5. [PMID: 27444409 DOI: 10.1016/j.crad.2016.06.114] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Revised: 06/15/2016] [Accepted: 06/20/2016] [Indexed: 11/17/2022]
Abstract
AIM To evaluate the technical feasibility and safety of covered airway stent placement for malignant tracheobronchial strictures in patients with an endotracheal tube. MATERIALS AND METHODS Data regarding retrievable, expandable, metal stent placement under fluoroscopic guidance in 20 patients with an endotracheal tube inserted for malignant tracheobronchial strictures were retrospectively analysed. The clinical effectiveness was assessed using the following variables: technical and clinical success; procedure and stent-related complications; and duration of intubation following stent placement. RESULTS Stent placement was technically successful in all 20 patients (100%), and with 19 of the 20 patients (95%) showing symptomatic improvement within 5 days. The endotracheal tube could be removed during (n=7) or after (n=12) stent placement, and the mean duration of intubation following stent placement was 1.4 days (range 0-3 days). One patient could not have his endotracheal tube removed and he died 9 days following stent placement in an intubated state. There were no procedure-related complications. Stent-related complications in three patients included partial (n=2) and complete (n=1) stent migration, all of which were managed with placement of a second stent (n=2) or stent removal and placement of a second stent (n=1). CONCLUSION Covered airway stent placement under fluoroscopic guidance in patients with an endotracheal tube inserted for malignant tracheobronchial strictures, is both technically feasible and safe.
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Affiliation(s)
- M J Kim
- Departments of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, 388-1, Poongnap 2-dong, Songpa-gu, Seoul, 138-736, Republic of Korea
| | - J H Shin
- Departments of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, 388-1, Poongnap 2-dong, Songpa-gu, Seoul, 138-736, Republic of Korea.
| | - J-H Park
- Departments of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, 388-1, Poongnap 2-dong, Songpa-gu, Seoul, 138-736, Republic of Korea
| | - J H Kim
- Departments of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, 388-1, Poongnap 2-dong, Songpa-gu, Seoul, 138-736, Republic of Korea
| | - H-Y Song
- Departments of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, 388-1, Poongnap 2-dong, Songpa-gu, Seoul, 138-736, Republic of Korea
| | - J Park
- Departments of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, 388-1, Poongnap 2-dong, Songpa-gu, Seoul, 138-736, Republic of Korea
| | - Y C Cho
- Departments of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, 388-1, Poongnap 2-dong, Songpa-gu, Seoul, 138-736, Republic of Korea
| | - S H Kim
- Departments of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, 388-1, Poongnap 2-dong, Songpa-gu, Seoul, 138-736, Republic of Korea
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Lee S, Lee JY, Hwang JH, Shin JH, Kim TH, Kim SK. Clinical importance of inflammatory facet joints of the spine in ankylosing spondylitis: a magnetic resonance imaging study. Scand J Rheumatol 2016; 45:491-498. [PMID: 27098409 DOI: 10.3109/03009742.2016.1150506] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
OBJECTIVES The aims of this study were to assess the reliability of a novel magnetic resonance imaging (MRI) scoring system for inflammatory lesions of facet joints and to clarify the clinical significance of facet joint inflammation in ankylosing spondylitis (AS). METHOD A total of 53 AS patients (45 males, 84.9%) were assessed for active inflammatory lesions involving the facet joints, as indicated by bone marrow oedema, at 23 discovertebral units (DVUs) between C2 and S1 using a novel scale, the AS Activity of the Facet joint (ASAFacet). The reliability of the ASAFacet was evaluated using intraclass correlation coefficients (ICCs) and Bland-Altman plots. RESULTS ICC values for the ASAFacet scores were 0.857 [95% confidence interval (CI) 0.741-0.919] for inter-observer and 0.941 (95% CI 0.873-0.969) for intra-observer reliability. Inflammatory activity scores in facet joints were evenly distributed at all spine levels (p = 0.294 for ASAFacet), whereas vertebral body inflammation was more prominent in the thoracic spine than in the cervical and lumbar spine [p < 0.001 for the AS spine MRI activity (ASspiMRI-a) score, p = 0.002 for the Berlin method, and p < 0.001 for the Spondyloarthritis Research Consortium of Canada (SPARCC) MRI index]. ASAFacet scores were closely associated with erythrocyte sediment rate (ESR) and C-reactive protein (CRP) levels (p < 0.05, respectively). Patients with peripheral arthritis had fewer lesions involving the vertebral bodies or facet joints than patients without peripheral arthritis (p < 0.001 for the four different MRI activity indexes). CONCLUSIONS This study suggests that recognition of facet joint inflammation has the potential to contribute to our understanding of clinical outcomes in AS.
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Affiliation(s)
- S Lee
- a Department of Radiology , Hanyang University Hospital for Rheumatic Diseases , Seoul , South Korea
| | - J Y Lee
- a Department of Radiology , Hanyang University Hospital for Rheumatic Diseases , Seoul , South Korea
| | - J H Hwang
- b Department of Preventive Medicine , Catholic University of Daegu School of Medicine , Daegu , South Korea
| | - J H Shin
- c Hanyang University Hospital for Rheumatic Diseases , Seoul , South Korea
| | - T-H Kim
- c Hanyang University Hospital for Rheumatic Diseases , Seoul , South Korea
| | - S-K Kim
- d Division of Rheumatology, Department of Internal Medicine, Arthritis and Autoimmunity Research Centre , Catholic University of Daegu School of Medicine , Daegu , South Korea
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40
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Jin Z, Wada A, Shin JH, Yugami N, Kodama R. A Single-shot Terahertz Time-domain Spectroscopy Instrument for Intense Laser System. ACTA ACUST UNITED AC 2016. [DOI: 10.1088/1742-6596/688/1/012040] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Han S, Shin JH, Hahn SY, Oh YL. Modified Core Biopsy Technique to Increase Diagnostic Yields for Well-Circumscribed Indeterminate Thyroid Nodules: A Retrospective Analysis. AJNR Am J Neuroradiol 2016; 37:1155-9. [PMID: 26846928 DOI: 10.3174/ajnr.a4650] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Accepted: 11/11/2015] [Indexed: 01/21/2023]
Abstract
BACKGROUND AND PURPOSE The results of conventional core biopsy for some thyroid nodules with indeterminate cytology have still remained indeterminate. The aim of this study was to evaluate whether the ultrasonography-guided core needle biopsy technique containing the nodule, capsular portion, and surrounding parenchyma was more effective than a conventional method in enhancing diagnostic yield for circumscribed solid thyroid nodules without malignant sonographic features. MATERIALS AND METHODS This retrospective comparative study evaluated 26 thyroid nodules in 26 consecutive patients between 2006 and 2010. They were biopsied by using a conventional method, and 61 nodules from 60 patients were biopsied by using a modified ultrasonography-guided core needle biopsy technique in 2013. The patients enrolled in this study presented with circumscribed solid thyroid nodules without malignant sonographic features, classified as nondiagnostic or atypia/follicular lesions of undetermined significance at previous cytology. The ultrasonography-guided core needle biopsy results of the 2 groups were compared. RESULTS The rate of inconclusive ultrasonography-guided core needle biopsy results was 34.6% (9/26) in the conventional group and 11.4% (7/61) in the modified technique group (P = .018). There was no significant difference in the mean size of the nodules between the 2 groups (P = .134). The malignancy rate was 33% (3/9) for the conventional group and 52% (27/52) for the modified technique group (P = .473). The most common malignant pathology was a follicular variant of papillary thyroid carcinoma and follicular adenoma was the most common benign lesion. CONCLUSIONS For circumscribed solid nodules without malignant sonographic features with indeterminate cytology, the ultrasonography-guided core needle biopsy technique containing the nodule, capsular portion, and surrounding parenchyma is more effective in diagnostic yield compared with a conventional method that biopsies the intranodular portion.
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Affiliation(s)
- S Han
- From the Departments of Radiology (S.H., J.H.S., S.Y.H.)
| | - J H Shin
- From the Departments of Radiology (S.H., J.H.S., S.Y.H.)
| | - S Y Hahn
- From the Departments of Radiology (S.H., J.H.S., S.Y.H.)
| | - Y L Oh
- Pathology (Y.L.O.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
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Lee JM, Kim CY, Shin JH, Lee SH, Song JH, Park MS, Kim YS, Kim SK, Chang J, Chung KS. EPH-ephrin signaling in hyperoxia induced lunginjury. Intensive Care Med Exp 2015. [PMCID: PMC4798300 DOI: 10.1186/2197-425x-3-s1-a563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Jeon JH, Nakajima K, Kim HT, Rhee YJ, Pathak VB, Cho MH, Shin JH, Yoo BJ, Hojbota C, Jo SH, Shin KW, Sung JH, Lee SK, Cho BI, Choi IW, Nam CH. A broadband gamma-ray spectrometry using novel unfolding algorithms for characterization of laser wakefield-generated betatron radiation. Rev Sci Instrum 2015; 86:123116. [PMID: 26724015 DOI: 10.1063/1.4939014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We present a high-flux, broadband gamma-ray spectrometry capable of characterizing the betatron radiation spectrum over the photon energy range from 10 keV to 20 MeV with respect to the peak photon energy, spectral bandwidth, and unique discrimination from background radiations, using a differential filtering spectrometer and the unfolding procedure based on the Monte Carlo code GEANT4. These properties are experimentally verified by measuring betatron radiation from a cm-scale laser wakefield accelerator (LWFA) driven by a 1-PW laser, using a differential filtering spectrometer consisting of a 15-filter and image plate stack. The gamma-ray spectra were derived by unfolding the photostimulated luminescence (PSL) values recorded on the image plates, using the spectrometer response matrix modeled with the Monte Carlo code GEANT4. The accuracy of unfolded betatron radiation spectra was assessed by unfolding the test PSL data simulated with GEANT4, showing an ambiguity of less than 20% and clear discrimination from the background radiation with less than 10%. The spectral analysis of betatron radiation from laser wakefield-accelerated electron beams with energies up to 3 GeV revealed radiation spectra characterized by synchrotron radiation with the critical photon energy up to 7 MeV. The gamma-ray spectrometer and unfolding method presented here facilitate an in-depth understanding of betatron radiation from LWFA process and a novel radiation source of high-quality photon beams in the MeV regime.
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Affiliation(s)
- Jong Ho Jeon
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju 500-712, South Korea
| | - Kazuhisa Nakajima
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju 500-712, South Korea
| | - Hyung Taek Kim
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju 500-712, South Korea
| | - Yong Joo Rhee
- Nuclear Data Center, Korea Atomic Energy Research Institute, Daejeon 305-353, South Korea
| | - Vishwa Bandhu Pathak
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju 500-712, South Korea
| | - Myung Hoon Cho
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju 500-712, South Korea
| | - Jung Hun Shin
- Advanced Photonics Research Institute, GIST, Gwangju 500-712, South Korea
| | - Byung Ju Yoo
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju 500-712, South Korea
| | - Calin Hojbota
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju 500-712, South Korea
| | - Sung Ha Jo
- Advanced Photonics Research Institute, GIST, Gwangju 500-712, South Korea
| | - Kang Woo Shin
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju 500-712, South Korea
| | - Jae Hee Sung
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju 500-712, South Korea
| | - Seung Ku Lee
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju 500-712, South Korea
| | - Byeoung Ick Cho
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju 500-712, South Korea
| | - Il Woo Choi
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju 500-712, South Korea
| | - Chang Hee Nam
- Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju 500-712, South Korea
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Hong SM, Park CW, Kim SW, Nam YJ, Yu JH, Shin JH, Yun CH, Im SH, Kim KT, Sung YC, Choi KY. NAMPT suppresses glucose deprivation-induced oxidative stress by increasing NADPH levels in breast cancer. Oncogene 2015; 35:3544-54. [PMID: 26568303 DOI: 10.1038/onc.2015.415] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Revised: 09/03/2015] [Accepted: 09/04/2015] [Indexed: 12/21/2022]
Abstract
Nicotinamide phosphoribosyltransferase (NAMPT) is a rate-limiting enzyme involved in NAD+ biosynthesis. Although NAMPT has emerged as a critical regulator of metabolic stress, the underlying mechanisms by which it regulates metabolic stress in cancer cells have not been completely elucidated. In this study, we determined that breast cancer cells expressing a high level of NAMPT were resistant to cell death induced by glucose depletion. Furthermore, NAMPT inhibition suppressed tumor growth in vivo in a xenograft model. Under glucose deprivation conditions, NAMPT inhibition was found to increase the mitochondrial reactive oxygen species (ROS) level, leading to cell death. This cell death was rescued by treatment with antioxidants or NAD+. Finally, we showed that NAMPT increased the pool of NAD+ that could be converted to NADPH through the pentose phosphate pathway and inhibited the depletion of reduced glutathione under glucose deprivation. Collectively, our results suggest a novel mechanism by which tumor cells protect themselves against glucose deprivation-induced oxidative stress by utilizing NAMPT to maintain NADPH levels.
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Affiliation(s)
- S M Hong
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang, Korea
| | - C W Park
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang, Korea.,Biokogen Inc. POSTECH Biotech Center #226, Pohang, Korea
| | - S W Kim
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang, Korea
| | - Y J Nam
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang, Korea
| | - J H Yu
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang, Korea
| | - J H Shin
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang, Korea
| | - C H Yun
- Academy of Immunology and Microbiology (AIM), Institute for Basic Science (IBS), Pohang, Korea
| | - S-H Im
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang, Korea.,Academy of Immunology and Microbiology (AIM), Institute for Basic Science (IBS), Pohang, Korea
| | - K-T Kim
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang, Korea
| | - Y C Sung
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang, Korea
| | - K Y Choi
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), Pohang, Korea
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Hawkins E, Shin JH, Lopez J. Presentation and Management of Extra-Pelvic Endometriosis of the Abdominal Wall, Perineum and Umbilicus and Intra-Peritoneal Findings. J Minim Invasive Gynecol 2015; 22:S128. [DOI: 10.1016/j.jmig.2015.08.398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Song Y, Shin JH, Yoon HK, Kim JW, Ko GY, Won HS. Bleeding after dilatation and curettage: the efficacy of transcatheter uterine artery embolisation. Clin Radiol 2015; 70:1388-92. [PMID: 26382745 DOI: 10.1016/j.crad.2015.07.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2014] [Revised: 04/19/2015] [Accepted: 07/22/2015] [Indexed: 10/23/2022]
Abstract
AIM To evaluate safety and clinical outcomes of uterine artery embolisation (UAE) for bleeding after dilatation and curettage (D&C) performed for abortion or termination. MATERIALS AND METHODS The outcomes were analysed in 11 patients who underwent UAE for bleeding after D&C for missed abortions (n=8), caesarean scar pregnancies (n=2), or planned termination (n=1) between October 2001 and December 2013. Angiograms and medical records were retrospectively reviewed in order to obtain the patients' baseline characteristics, technical/clinical success rate, complications, and follow-up data regarding menstruation. RESULTS Technical success, defined as successful catheterisation of both uterine arteries with embolisation to haemostasis, was 100%, whereas clinical success, defined as cessation of bleeding after the initial session of UAE and without the need for additional UAE or surgery for the purpose of haemostasis, was 81.8% (nine of 11). In the two patients with clinical failure due to recurrent vaginal bleeding after UAE, one patient underwent repeat UAE and showed a successful outcome, whilst the other patient required hysterectomy with pathological results of placenta increta. Two other patients underwent hysterectomy for placenta percreta or hydatidiform mole-mimicking remnant placenta. None of the patients included in the present series had procedure-related complications. Menstruation resumed in all eight patients with an intact uterus during the mean follow-up period. CONCLUSION UAE may be a safe and effective treatment for bleeding after D&C, especially for women who wish to preserve their fertility; however, hysterectomy may be indicated for patients with a placental abnormality.
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Affiliation(s)
- Y Song
- Department of Radiology and Research Institute of Radiology, University of Ulsan, College of Medicine, Asan Medical Center, 86, Asanbyeongwon-gil, Songpa-gu, Seoul 138-736, South Korea
| | - J H Shin
- Department of Radiology and Research Institute of Radiology, University of Ulsan, College of Medicine, Asan Medical Center, 86, Asanbyeongwon-gil, Songpa-gu, Seoul 138-736, South Korea.
| | - H-K Yoon
- Department of Radiology and Research Institute of Radiology, University of Ulsan, College of Medicine, Asan Medical Center, 86, Asanbyeongwon-gil, Songpa-gu, Seoul 138-736, South Korea
| | - J W Kim
- Department of Radiology and Research Institute of Radiology, University of Ulsan, College of Medicine, Asan Medical Center, 86, Asanbyeongwon-gil, Songpa-gu, Seoul 138-736, South Korea
| | - G-Y Ko
- Department of Radiology and Research Institute of Radiology, University of Ulsan, College of Medicine, Asan Medical Center, 86, Asanbyeongwon-gil, Songpa-gu, Seoul 138-736, South Korea
| | - H-S Won
- Department of Radiology and Research Institute of Radiology, University of Ulsan, College of Medicine, Asan Medical Center, 86, Asanbyeongwon-gil, Songpa-gu, Seoul 138-736, South Korea
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Eom HJ, Shin JH, Cho YJ, Nam DH, Ko GY, Yoon HK. Transarterial embolisation of renal arteriovenous malformation: safety and efficacy in 24 patients with follow-up. Clin Radiol 2015; 70:1177-84. [PMID: 26183132 DOI: 10.1016/j.crad.2015.06.079] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Revised: 05/06/2015] [Accepted: 06/05/2015] [Indexed: 11/29/2022]
Abstract
AIM To evaluate the efficacy and safety of renal artery embolisation (RAE) for renal arteriovenous malformation (AVM) as well as its outcomes. MATERIALS AND METHODS The technical and clinical success rates, radiological and laboratory findings, and complications of RAE for 31 renal AVMs in 24 patients (M:F=9:15, mean age 46 years) at two separate medical institutions were retrospectively evaluated. Technical success was defined as complete occlusion of feeding arteries with no residual nidus seen on post-treatment angiography. Clinical failure was defined as recurrence of haematuria, presence of AVM on follow-up ultrasound or computed tomography, repeated RAE or surgery for the control of haematuria. Overall clinical success was defined as resolution haematuria or disappearance of AVM on follow-up imaging after single or multiple sessions of RAE. RESULTS Types of renal AVM were AVM, arterio-venous fistula (AVF) with intranidal aneurysm, and acquired AVF in 19, 1, and 4 patients, respectively. 18 patients (75%) underwent a single session of RAE, while 6 patients (25%) had two or more sessions of RAE. The level of embolisation was feeder, segmental artery, and main renal artery in 28 (90%), 2 (6%), and 1 (4%) procedures, respectively. Coil, n-butyl 2-cyanoacrylate, and polyvinyl alcohol were the most frequently chosen embolic materials and were used in 19, 14, and 8 procedures, respectively. The clinical success rate after initial RAE was 67% (16/24). Overall clinical success rate, including multisession RAE, was 88% (21/24). The technical success rate of 31 procedures was 65% (20/31). Among 11 technical failures in 10 patients, 4 achieved clinical success without additional RAE, 3 underwent second session RAE to achieve clinical success, and 3 patients underwent nephrectomy due to recurrence. CONCLUSION RAE is a safe and effective treatment for renal AVM. Technical failure of RAE does not always lead to clinical failure and multiple embolisation sessions may be effective for recurrent renal AVM.
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Affiliation(s)
- H-J Eom
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - J H Shin
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea.
| | - Y J Cho
- Department of Radiology, Busan Paik Hospital, Inje University College of Medicine, Busan, South Korea
| | - D H Nam
- Department of Radiology, Kyung Hee University Hospital at Gangdong, School of Medicine, Kyung Hee University, Seoul, South Korea
| | - G-Y Ko
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - H-K Yoon
- Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
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Ohi K, Ursini G, Li M, Shin JH, Ye T, Chen Q, Tao R, Kleinman JE, Hyde TM, Hashimoto R, Weinberger DR. DEGS2 polymorphism associated with cognition in schizophrenia is associated with gene expression in brain. Transl Psychiatry 2015; 5:e550. [PMID: 25871975 PMCID: PMC4462608 DOI: 10.1038/tp.2015.45] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Revised: 01/27/2015] [Accepted: 01/28/2015] [Indexed: 02/07/2023] Open
Abstract
A genome-wide association study of cognitive deficits in patients with schizophrenia in Japan found association with a missense genetic variant (rs7157599, Asn8Ser) in the delta(4)-desaturase, sphingolipid 2 (DEGS2) gene. A replication analysis using Caucasian samples showed a directionally consistent trend for cognitive association of a proxy single-nucleotide polymorphism (SNP), rs3783332. Although the DEGS2 gene is expressed in human brain, it is unknown how DEGS2 expression varies during human life and whether it is affected by psychiatric disorders and genetic variants. To address these questions, we examined DEGS2 messenger RNA using next-generation sequencing in postmortem dorsolateral prefrontal cortical tissue from a total of 418 Caucasian samples including patients with schizophrenia, bipolar disorder and major depressive disorder. DEGS2 is expressed at very low levels prenatally and increases gradually from birth to adolescence and consistently expressed across adulthood. Rs3783332 genotype was significantly associated with the expression across all subjects (F3,348=10.79, P=1.12 × 10(-)(3)), particularly in control subjects (F1,87=13.14, P=4.86 × 10(-4)). Similar results were found with rs715799 genotype. The carriers of the risk-associated minor allele at both loci showed significantly lower expression compared with subjects homozygous for the non-risk major allele and this was a consistent finding across all diagnostic groups. DEGS2 expression showed no association with diagnostic status after correcting for multiple testing (P>0.05). Our findings demonstrate that a SNP showing genome-wide association study significant association with cognition in schizophrenia is also associated with regulation of DEGS2 expression, implicating a molecular mechanism for the clinical association.
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Affiliation(s)
- K Ohi
- Department of Clinical Genetics, Lieber Institute for Brain Development, Johns Hopkins Medical Campus, Baltimore, MD, USA,Department of Psychiatry, Osaka University Graduate School of Medicine, Osaka, Japan
| | - G Ursini
- Department of Clinical Genetics, Lieber Institute for Brain Development, Johns Hopkins Medical Campus, Baltimore, MD, USA
| | - M Li
- Department of Clinical Genetics, Lieber Institute for Brain Development, Johns Hopkins Medical Campus, Baltimore, MD, USA
| | - J H Shin
- Department of Clinical Genetics, Lieber Institute for Brain Development, Johns Hopkins Medical Campus, Baltimore, MD, USA
| | - T Ye
- Department of Clinical Genetics, Lieber Institute for Brain Development, Johns Hopkins Medical Campus, Baltimore, MD, USA
| | - Q Chen
- Department of Clinical Genetics, Lieber Institute for Brain Development, Johns Hopkins Medical Campus, Baltimore, MD, USA
| | - R Tao
- Department of Clinical Genetics, Lieber Institute for Brain Development, Johns Hopkins Medical Campus, Baltimore, MD, USA
| | - J E Kleinman
- Department of Clinical Genetics, Lieber Institute for Brain Development, Johns Hopkins Medical Campus, Baltimore, MD, USA
| | - T M Hyde
- Department of Clinical Genetics, Lieber Institute for Brain Development, Johns Hopkins Medical Campus, Baltimore, MD, USA,Department of Psychiatry, Johns Hopkins University School of Medicine, Baltimore, MD, USA,Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - R Hashimoto
- Department of Psychiatry, Osaka University Graduate School of Medicine, Osaka, Japan,Molecular Research Center for Children's Mental Development, United Graduate School of Child Development, Osaka University, Osaka, Japan
| | - D R Weinberger
- Department of Clinical Genetics, Lieber Institute for Brain Development, Johns Hopkins Medical Campus, Baltimore, MD, USA,Department of Psychiatry, Johns Hopkins University School of Medicine, Baltimore, MD, USA,Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA,Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD, USA,Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA,Department of Clinical Genetics, Lieber Institute for Brain Development, Johns Hopkins Medical Campus, 855 North Wolfe Street, Baltimore, MD, USA. E-mail:
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Garcia M, Shin JH, Schlaefli A, Greco LF, Maunsell FP, Thatcher WW, Santos JEP, Staples CR. Increasing intake of essential fatty acids from milk replacer benefits performance, immune responses, and health of preweaned Holstein calves. J Dairy Sci 2014; 98:458-77. [PMID: 25465563 DOI: 10.3168/jds.2014-8384] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Accepted: 09/23/2014] [Indexed: 01/10/2023]
Abstract
The objective was to evaluate the effect of feeding increasing amounts of essential fatty acids (FA) in milk replacer (MR) during the first 60 d of life on growth, health, and immunity of Holstein calves. Calves were born from dams fed low concentrations of total and essential FA during the lasT2 mo of pregnancy. Newborn calves were blocked by sex and parity of the dam and assigned randomly to receive 1 of 4 MR treatments (T). Hydrogenated coconut oil and soybean oil were mixed with emulsifier and commercial MR powder to prepare the following 4 MR containing 0.119 and 0.007 (T1), 0.187 and 0.017 (T2), 0.321 and 0.036 (T3), and 0.593 and 0.076 (T4) g of intake per kg of metabolic body weight (BW(0.75)) of linoleic acid and α-linolenic acid, respectively. At 30 d of life, concentrations of essential FA (linoleic acid and α-linolenic acid) in liver increased, whereas concentrations of C12:0, C14:0, C16:0, and C20:3n-9 decreased linearly with increasing intake of essential FA. Body weight gain and feed efficiency were optimized when male calves consumed T2, whereas gain by female calves tended to increase linearly with increasing intake of essential FA during the first 30 d of age. However, these responses to treatment were not maintained after initiation of concentrate feeding at 31 d of life. Over the 60-d preweaning period, wither and hip heights were improved in both sexes as intake of essential FA increased up to T3. Some measures of health and immunity were affected by replacing some coconut oil with soybean oil. Severity of diarrhea tended to decrease linearly; plasma concentrations of haptoglobin during diarrhea were lower in T2, T3, and T4; phagocytosis by blood neutrophils tended to peak for calves fed T2; in vitro proliferation of stimulated blood lymphocytes was greater for calves fed T2; in vitro stimulated blood cells produced more IFN-γ (up to T3 for males and T2 for females), concentrations of serum IgG against ovalbumin injections were increased in males fed T2 or T3; and skin-fold thickness increased in response to an intradermal antigen injection of all calves fed up to T4. Across sex and under the conditions of the present study, mean daily intakes of linoleic acid between 3 to 5g/d and intakes of α-linolenic acid between 0.3 and 0.6g/d during the first 30 d of life promoted growth of preweaned Holstein calves, possibly by improving their immune status.
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Affiliation(s)
- M Garcia
- Department of Animal Sciences, University of Florida, Gainesville 32608
| | - J H Shin
- Department of Animal Sciences, University of Florida, Gainesville 32608
| | - A Schlaefli
- Department of Animal Sciences, University of Florida, Gainesville 32608
| | - L F Greco
- Department of Animal Sciences, University of Florida, Gainesville 32608
| | - F P Maunsell
- College of Veterinary Medicine, University of Florida, Gainesville 32610
| | - W W Thatcher
- Department of Animal Sciences, University of Florida, Gainesville 32608
| | - J E P Santos
- Department of Animal Sciences, University of Florida, Gainesville 32608.
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Shin JH, Gadde KM, Østbye T, Bray GA. Weight changes in obese adults 6-months after discontinuation of double-blind zonisamide or placebo treatment. Diabetes Obes Metab 2014; 16:766-8. [PMID: 25123600 PMCID: PMC4135527 DOI: 10.1111/dom.12275] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2013] [Revised: 01/05/2014] [Accepted: 02/06/2014] [Indexed: 11/28/2022]
Abstract
We evaluated weight changes in obese patients at 6-months after they ended participation in a 12-month randomised controlled trial in which they received daily placebo, zonisamide 200 mg or zonisamide 400 mg, in addition to lifestyle counselling. Of the originally randomised 225 patients, 218 completed month-12 when study interventions were discontinued. For the 154 patients who returned for 6-month follow-up off-treatment, weight changes between month-12 and month-18 for placebo (n = 53), zonisamide 200 mg (n = 49) and zonisamide 400 mg groups (n = 52) were 0.5 kg [95% confidence interval (CI), -0.8 to 1.8; 0.7%], 1.5 kg (0.2-2.8; 1.6%; p = 0.26 vs. placebo) and 2.4 kg (1.1-3.7; 2.6%; p = 0.04 vs. placebo), respectively. Our results suggest that although zonisamide 400 mg daily for 12-months resulted in greater weight loss than with placebo, weight regain after discontinuation of interventions was greater in the zonisamide 400 mg group than placebo group.
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Affiliation(s)
- J H Shin
- Obesity Clinical Trials Programme, Duke University Medical Center, Durham, NC, USA
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