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Nam JY, Tokmurzin D, Yoon SM, Ra HW, Lee JG, Lee DH, Seo MW. Carbon dioxide gasification characteristics of disposable COVID-19 masks using bubbling fluidized bed reactor. Environ Res 2023; 235:116669. [PMID: 37453506 DOI: 10.1016/j.envres.2023.116669] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 05/06/2023] [Revised: 07/09/2023] [Accepted: 07/13/2023] [Indexed: 07/18/2023]
Abstract
The global demand for masks has increased significantly owing to COVID-19 and mutated viruses, resulting in a massive amount of mask waste of approximately 490,000 tons per month. Mask waste recycling is challenging because of the composition of multicomponent polymers and iron, which puts them at risk of viral infection. Conventional treatment methods also cause environmental pollution. Gasification is an effective method for processing multicomponent plastics and obtaining syngas for various applications. This study investigated the carbon dioxide gasification and tar removal characteristics of an activated carbon bed using a 1-kg/h laboratory-scale bubble fluidized bed gasifier. The syngas composition was analyzed as 10.52 vol% of hydrogen, 6.18 vol% of carbon monoxide, 12.05 vol% of methane, and 14.44 vol% of hydrocarbons (C2-C3). The results of carbon dioxide gasification with activated carbon showed a tar-reduction efficiency of 49%, carbon conversion efficiency of 45.16%, and cold gas efficiency of 88.92%. This study provides basic data on mask waste carbon dioxide gasification using greenhouse gases as useful product gases.
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Affiliation(s)
- Ji Young Nam
- School of Chemical Engineering, Sungkyunkwan University (SKKU), 2066 Seobu-ro, Jangangu, Suwon, Gyeonggi-do, 16419, Republic of Korea; Climate Change Research Division, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon, 34129, Republic of Korea
| | - Diyar Tokmurzin
- Climate Change Research Division, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon, 34129, Republic of Korea
| | - Sung Min Yoon
- Climate Change Research Division, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon, 34129, Republic of Korea
| | - Ho Won Ra
- Climate Change Research Division, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon, 34129, Republic of Korea
| | - Jae Goo Lee
- Climate Change Research Division, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon, 34129, Republic of Korea
| | - Dong Hyun Lee
- School of Chemical Engineering, Sungkyunkwan University (SKKU), 2066 Seobu-ro, Jangangu, Suwon, Gyeonggi-do, 16419, Republic of Korea.
| | - Myung Won Seo
- School of Environmental Engineering, University of Seoul, 163 Seoulsiripdae-ro, Dongdaemun-gu, Seoul, Republic of Korea.
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Choi SH, Lee JG, Cho JH. The Role of Local Prostate and Metastasis-Directed Radiotherapy in the Treatment of Oligometastatic Prostate Cancer. Int J Radiat Oncol Biol Phys 2023; 117:e373. [PMID: 37785271 DOI: 10.1016/j.ijrobp.2023.06.2476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) The local ablative therapy for oligometastatic disease (OMD) has the potential to delay further metastases and improve survival. However, it has not been fully elucidated how prostate primary radiotherapy (PPR) and metastasis-directed radiotherapy (MDR) affect prognosis in each different OMD scenario. Herein, we tried to provide efficacy and future perspectives for MDR in oligometastatic prostate cancer. MATERIALS/METHODS Patients diagnosed with prostate cancer between 2010 and 2019 and treated for OMD (≤5 active lesions), which occurred synchronously or metachronously, were included. All patients received MDR at all detected lesions (OMDRT). OMDRT which was performed as soon as OMD was detected was classified as early, and OMDRT for progressions after hormone therapy was classified as late. The primary endpoint was survival after OMDRT, and timing of progression after RT was also analyzed. RESULTS A total of 82 patients with oligometastatic prostate cancer received OMDRT. Among 36 patients with synchronous OMD, 58% received PPR at diagnosis, and 64% received early OMDRT. Among 46 patients with metachronous OMD, 80% received early OMDRT, and 28 received sequential OMDRT for repetitive OMD events. With a median follow-up of 32 months after OMDRT, 54 patients experienced progression and 5-year survival was 78%. Survival was highest in patients with synchronous OMD and early RT (5-year 86%), and 5-year survival of patients with metachronous OMD and early RT was significantly higher than those with late RT (78% vs. 44%, p = 0.003). Survival of patients with synchronous OMD and PPR was significantly higher than those without PPR or with metachronous OMD (5-year 90% vs. 66%, p = 0.030), by delaying progressions (17.9 vs. 7.0 months, p = 0.005). CONCLUSION Survival gain could be achieved through OMDRT in oligometastatic prostate cancer, especially in synchronous OMD status. Also, it was possible to improve the prognosis further when OMDRT was performed early and with PPR.
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Affiliation(s)
- S H Choi
- Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea, Republic of (South) Korea
| | - J G Lee
- Department of Radiation Oncology, Yonsei Cancer Center, Heavy Ion Therapy Research Institute, Yonsei University College of Medicine, Seoul, Korea, Republic of (South) Korea
| | - J H Cho
- Department of Radiation Oncology, Yonsei Cancer Center, Heavy Ion Therapy Research Institute, Yonsei University College of Medicine, Seoul, Korea, Republic of (South) Korea
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Choi H, Lee JG, Kim J, Byun HK, Kim KH, Koom WS, Cho JH, Lee IJ. Mapping the Anatomical Distribution of MRI-Identified Locoregional Recurrence following Robotic-Assisted Laparoscopic Prostatectomy for Prostate Adenocarcinoma. Int J Radiat Oncol Biol Phys 2023; 117:e373. [PMID: 37785270 DOI: 10.1016/j.ijrobp.2023.06.2475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) The pattern of locoregional recurrence specifically after robotic-assisted laparoscopic prostatectomy (RALP) for prostate adenocarcinoma is still unknown. In this study, we reviewed pelvic magnetic resonance images (MRI) after postoperative biochemical recurrence (BCR) and drew a map of locoregional recurrence to support evidence of determining the optimal target volume of salvage radiotherapy in a post-RALP BCR scenario. MATERIALS/METHODS We have retrospectively searched 7,583 prostate adenocarcinoma patients who have received RALP in our institution between January 2010 and December 2021, and found a pool of highly selected patients with gross tumor recurrence confirmed by post-BCR pelvic MRIs and did not have other histories of malignancy. BCR was defined as the serum PSA more or equal to 0.2 ng/mL, or three consecutive increases. Patients with serum PSA nadir more or equal to 0.2 ng/mL on the 90th postoperative day (POD 90) were excluded to guarantee successful tumor removal. We have reviewed serum PSA levels using R codes, MRI and pathological reports using Excel, and descriptive statistics using SPSS 25. The gross lesions were contoured on the correlating MRIs using MIM Maestro 7.1. The RT structure DICOM files were merged into a map using MATLAB 2022b. In addition, we have conducted Fisher exacted test, Mann-Whitney U test, and logistic regression to identify risk factors for regional recurrence. RESULTS A total of 173 patients were identified with locoregional recurrence from post-BCR pelvic MRIs, and 139 (80.3%) patients were in the high-risk group or very-high-risk group according to the NCCN guidelines: 57 (32.9%) patients with histological grade group 5, 50 (28.9%) patients with initial PSA over 20 ng/mL, 114 (65.9%) patients with extracapsular extension, 55 (31.8%) patients with seminal vesicle invasion, and 15 (9%) patients with pN1. The median follow-up was 4.7 (IQR 2.8-6.9) years for pelvic MRIs and 5.8 (IQR 4.0-8.6) years for serum PSA. The BCF survival was median of 10.7 (IQR 4.6-19.1) months, and the locoregional recurrence-free survival was median of 24.6 (IQR 9.7-49.4) months for this subgroup of patients. At first locoregional recurrence, 148 (85.5%) patients were local only, 20 (11.6%) patients were regional only, and 5 (2.9%) patients were both local and regional. Out of the 25 patients with regional recurrence, the incidence of gross tumor recurrence differed by nodal sites: 3 (12%) in perirectal space, 5 (20%) in internal iliac, 7 (28%) in obturator, 13 (52%) in external iliac, and 6 (24%) in common iliac lymph nodes. CONCLUSION We have found 173 patients and were able to map reliable gross tumor recurrence sites after RALP and confirmed by pelvic MRIs following BCR. The map supports evidence of using the existing consensus pelvic clinical target volume of salvage radiotherapy, in a post-RALP BCR scenario.
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Affiliation(s)
- H Choi
- Department of Radiation Oncology, Yonsei Cancer Center, Heavy Ion Therapy Research Institute, Yonsei University College of Medicine, Seoul, Korea, Republic of (South) Korea
| | - J G Lee
- Department of Radiation Oncology, Yonsei Cancer Center, Heavy Ion Therapy Research Institute, Yonsei University College of Medicine, Seoul, Korea, Republic of (South) Korea
| | - J Kim
- Department of Radiation Oncology, Yonsei Cancer Center, Heavy Ion Therapy Research Institute, Yonsei University College of Medicine, Seoul, Korea, Republic of (South) Korea
| | - H K Byun
- Department of Radiation Oncology, Yonsei Cancer Center, Heavy Ion Therapy Research Institute, Yonsei University College of Medicine, Seoul, Korea, Republic of (South) Korea
| | - K H Kim
- Department of Radiation Oncology, Yonsei Cancer Center, Heavy Ion Therapy Research Institute, Yonsei University College of Medicine, Seoul, Korea, Republic of (South) Korea
| | - W S Koom
- Department of Radiation Oncology, Yonsei Cancer Center, Heavy Ion Therapy Research Institute, Yonsei University College of Medicine, Seoul, Korea, Republic of (South) Korea
| | - J H Cho
- Department of Radiation Oncology, Yonsei Cancer Center, Heavy Ion Therapy Research Institute, Yonsei University College of Medicine, Seoul, Korea, Republic of (South) Korea
| | - I J Lee
- Department of Radiation Oncology, Yonsei Cancer Center, Heavy Ion Therapy Research Institute, Yonsei University College of Medicine, Seoul, Korea, Republic of (South) Korea
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Yang G, Yoon HI, Lee JG, Kim J, Kim J, Kim KH. Prediction of Lymphopenia and Survival with Baseline Absolute Lymphocyte Count and Irradiated Dose to Immune Cells in Patients with Non-Small Cell Lung Cancer Treated with Concurrent Chemoradiotherapy. Int J Radiat Oncol Biol Phys 2023; 117:e77-e78. [PMID: 37786176 DOI: 10.1016/j.ijrobp.2023.06.818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) This study aimed to investigate the effect of effective dose to immune cell (EDIC) combined with pre-radiotherapy (RT) absolute lymphocyte count (ALC) on treatment-related lymphopenia during RT and treatment outcome in patients with locally advanced non-small cell lung cancer (NSCLC). A subgroup analysis in patients who received consolidation immunotherapy was also conducted. MATERIALS/METHODS Between August 2008 and December 2021, 517 patients with locally advanced NSCLC treated with definitive concurrent chemoradiotherapy (CRT) were retrospectively analyzed. All patients had serial complete-blood-count tests at pre-, and during-CRT. Severe lymphopenia was defined as ALC < 0.5x109cells/L during RT. EDIC was calculated according to mean doses of the lung, heart and the total body. The patients were grouped according to high and low EDIC and pre-RT ALC and was assessed for its correlation with radiation induced lymphopenia and survival outcomes. RESULTS Of 517 eligible patients, most of the patients received weekly paclitaxel with carboplatin (90.3%) and 195 patients (37.7%) received consolidation immunotherapy following CRT. A median radiation dose of 63 Gy (IQR, 60-64.5) was delivered in 30 fractions. The optimal cutoff value of EDIC and pre-RT ALC for predicting severe lymphopenia were 2.89 Gy and 2.03x109cells/L, respectively. High risk group was defined as EDIC ≥ 2.89 Gy and pre-RT ALC < 2.03x109cells/L, low risk group as EDIC <2.89 Gy and pre-RT ALC ≥ 2.03x109cells/L, and intermediate group as EDIC ≥ 2.89 Gy and pre-RT ALC ≥ 2.03x109cells/L or EDIC < 2.89 Gy and pre-RT ALC < 2.03x109cells/L. The incidence of severe lymphopenia during RT in high, intermediate, and low risk group was 90.1%, 77.1%, and 52.3%, respectively (p<0.001). The risk groups were independent predictors for both progression-free survival (PFS) (p<0.001) and overall survival (OS) (p<0.001). The high-risk group had higher incidence of locoregional and distant recurrences (p<0.001). In the subset of patients who were treated with consolidation immunotherapy, the risk groups were predictive of severe lymphopenia (p = 0.001), PFS (p = 0.004), and OS (p = 0.012). CONCLUSION This study demonstrated that the combination of EDIC and pre-RT ALC is a predictor for severe lymphopenia during RT, recurrence, and survival in patients with locally advanced NSCLC who received CRT. Moreover, the combination of EDIC and pre-RT ALC may serve as a potential biomarker for the benefit of maintenance immunotherapy.
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Affiliation(s)
- G Yang
- Department of Radiation Oncology, Yonsei Cancer Center, Heavy Ion Therapy Research Institute, Yonsei University College of Medicine, Seoul, Korea, Republic of (South) Korea
| | - H I Yoon
- Department of Radiation Oncology, Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea, Republic of (South) Korea
| | - J G Lee
- Department of Radiation Oncology, Yonsei Cancer Center, Heavy Ion Therapy Research Institute, Yonsei University College of Medicine, Seoul, Korea, Republic of (South) Korea
| | - J Kim
- Department of Radiation Oncology, Yonsei University College of Medicine, Seoul, Korea, Republic of (South) Korea
| | - J Kim
- Department of Radiation Oncology, Yonsei Cancer Center, Heavy Ion Therapy Research Institute, Yonsei University College of Medicine, Seoul, Korea, Republic of (South) Korea
| | - K H Kim
- Department of Radiation Oncology, Yonsei Cancer Center, Heavy Ion Therapy Research Institute, Yonsei University College of Medicine, Seoul, Korea, Republic of (South) Korea
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Kim YT, Lee JG, Joo DJ, Kim DY, Seong J. Liver-Directed Combined Radiotherapy for Downstaging of the Milan Advanced Hepatocellular Carcinoma Converting to Liver Transplantation. Int J Radiat Oncol Biol Phys 2023; 117:e308. [PMID: 37785116 DOI: 10.1016/j.ijrobp.2023.06.2332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Recent success of combined immunotherapy sheds a light to the future of advanced hepatocellular carcinoma patients but still remains as a palliative setting. The best oncologic outcome for HCC can be obtained by curative surgery either by resection or liver transplantation (LT). Efficacy of liver-directed combined radiotherapy (LD-CRT) for downstaging and subsequent surgical resection in locally advanced HCC had been reported earlier by our team. In this study, we investigated the role of LD-CRT as a downstaging strategy for converting advanced hepatocellular carcinoma to LT. MATERIALS/METHODS We reviewed 55 hepatocellular carcinoma patients who had undergone downstaging LD-CRT and subsequent liver transplantation from January 2009 to February 2022. Patients within Milan criteria at the time of receiving radiotherapy were excluded and clinical characteristics and histopathology of explant liver were evaluated. The overall survival and disease-free survival were assessed using the Kaplan-Meier method RESULTS: The median follow-up period was 48.6 months (range 6.9 - 151.7 months). Of 55 patients, 24 (43.6%) were treatment naïve. At the time of RT, 36 patients presented large tumor (tumor diameter >5 cm) or multiple lesions (>3 lesions), 37 with major vessel involvement or portal vein tumor thrombosis, and 7 with extrahepatic lesion. LD-CRT was given as localized concurrent chemoradiation (CCRT) for 41 patients (74.5%) and transarterial chemoembolization (TACE) plus RT for 10 patents (18.2%). Substantial downstaging has been achieved in 38 (69%) patients with initially over the Milan to within Milan. Specifically, 29 of 37 patients initially with major vessel invasion or with tumor thrombosis were successfully converted to microscopic vessel invasion or tumor thrombus-free status in explant liver. 5-year overall survival was 68.1% and 2-year disease-free survival was 51%, respectively. Recurrence after transplantation was observed in 18 patients (4 intrahepatic recurrence and 14 extrahepatic metastasis) and the majority (14/18) occurred within 2 years. CONCLUSION Liver-directed combined radiotherapy as a downstaging strategy for liver transplantation achieved favorable oncologic outcomes in advanced hepatocellular carcinoma patients. This study suggests that active adoption of radiotherapy needs full consideration for locally advanced HCC patients, opening a chance for curative LT.
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Affiliation(s)
- Y T Kim
- Department of Radiation Oncology, Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea, Republic of (South) Korea
| | - J G Lee
- Department of Surgery, Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea, Republic of (South) Korea
| | - D J Joo
- Department of Surgery, Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea, Republic of (South) Korea
| | - D Y Kim
- Department of Internal Medicine, Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea, Republic of (South) Korea
| | - J Seong
- Department of Radiation Oncology, Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea, Republic of (South) Korea
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Nam JY, Lee TR, Tokmurzin D, Park SJ, Ra HW, Yoon SJ, Mun TY, Yoon SM, Moon JH, Lee JG, Lee DH, Seo MW. Hydrogen-rich gas production from disposable COVID-19 mask by steam gasification. Fuel (Lond) 2023; 331:125720. [PMID: 36033729 PMCID: PMC9399138 DOI: 10.1016/j.fuel.2022.125720] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 08/08/2022] [Accepted: 08/18/2022] [Indexed: 06/04/2023]
Abstract
Globally, the demand for masks has increased due to the COVID-19 pandemic, resulting in 490,201 tons of waste masks disposed of per month. Since masks are used in places with a high risk of virus infection, waste masks retain the risk of virus contamination. In this study, a 1 kg/h lab-scale (diameter: 0.114 m, height: 1 m) bubbling fluidized bed gasifier was used for steam gasification (temperature: 800 °C, steam/carbon (S/C) ratio: 1.5) of waste masks. The use of a downstream reactor with activated carbon (AC) for tar cracking and the enhancement of hydrogen production was examined. Steam gasification with AC produces syngas with H2, CO, CH4, and CO2 content of 38.89, 6.40, 21.69, and 7.34 vol%, respectively. The lower heating value of the product gas was 29.66 MJ/Nm3 and the cold gas efficiency was 74.55 %. This study showed that steam gasification can be used for the utilization of waste masks and the production of hydrogen-rich gas for further applications.
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Key Words
- AC, Activated Carbon
- Activated carbon
- BFB, Bubbling fluidized bed
- CCE, Carbon conversion efficiency
- CGE, Cold gas efficiency
- DTG, Derivative thermos-gravimetry
- Disposable COVID-19 mask
- FT-IR, Fourier-transform infrared spectroscopy
- Fluidized bed
- GC, Gas chromatography
- GCMS, Gas chromatography-mass spectrometry
- HMI, Human machine interface
- IPA, Isopropyl alcohol
- LHV, Lower Heating Value
- MFC, Mass flow controller
- MSW, Municipal solid waste
- NDIR, Non-Dispersive Infrared Spectroscopy
- PP, Polypropylene
- PPE, Personal protective equipment
- PU, Polyurethane
- RPM, revolutions per minute
- Steam gasification
- TCD, Thermal conductivity detector
- Tar
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Affiliation(s)
- Ji Young Nam
- Climate Change Research Division, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea
- School of Chemical Engineering, Sungkyunkwan University (SKKU), 2066 Seobu-ro, Jangangu, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - Tae Ryeon Lee
- Climate Change Research Division, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea
| | - Diyar Tokmurzin
- Climate Change Research Division, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea
| | - Sung Jin Park
- Climate Change Research Division, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea
| | - Ho Won Ra
- Climate Change Research Division, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea
| | - Sang Jun Yoon
- Climate Change Research Division, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea
| | - Tae-Young Mun
- Climate Change Research Division, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea
| | - Sung Min Yoon
- Climate Change Research Division, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea
| | - Ji Hong Moon
- Climate Change Research Division, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea
| | - Jae Goo Lee
- Climate Change Research Division, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea
| | - Dong Hyun Lee
- School of Chemical Engineering, Sungkyunkwan University (SKKU), 2066 Seobu-ro, Jangangu, Suwon, Gyeonggi-do 16419, Republic of Korea
| | - Myung Won Seo
- School of Environmental Engineering, University of Seoul, 163 Seoulsiripdae-ro, Dongdaemun-gu, Seoul, Republic of Korea
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Lee JG, Ou G. A85 LIKELIHOOD OF ENDOSCOPY CANCELLATION BASED ON VANCOMYCIN-RESISTANT ENTEROCOCCI (VRE) COLONIZATION STATUS AND INFECTION CONTROL PRACTICES. J Can Assoc Gastroenterol 2022. [PMCID: PMC8859366 DOI: 10.1093/jcag/gwab049.084] [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] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Background “Terminal cleaning” is a practice of rigorous cleaning of endoscopy suite following endoscopies for patients colonized with vancomycin-resistant enterocci (VRE) with the intention of reducing VRE transmission. Such practice entails double-wiping all surfaces including the floor with disinfectants before a non-VRE patient can use the endoscopy room. While intuitive, such time-consuming practice is not supported by evidence and may have unintended negative impact on patient access to timely endoscopic evaluation. Aims To determine whether terminal cleaning of endoscopy suite for VRE-colonized patients has any negative impact on inpatient access to timely endoscopic evaluation. Methods As part of a quality improvement study, inpatient endoscopy data was gathered over a 3-month period between February 2021 and April 2021 at a tertiary centre. EUS, ERCP, and travel cases outside of the endoscopy suite were excluded. The cancellation rates were compared between VRE-colonized patients and non-VRE patients using the Fisher’s exact test. P value of <0.05 was considered statistically significant. Results A total of 262 inpatient endoscopic procedures were scheduled and included in the study. Sixty-six (25.2%) of inpatient procedures were cancelled during this period (Table 1). A total of 24 procedures were scheduled for VRE patients, 9 of which were cancelled because of insufficient operating time and two due to concurrent carbapenamase-producing organism carriage and poor bowel preparation. In the non-VRE group, 55 (23.3%) procedures were cancelled for various reasons (Table 1). In subgroup analysis where cancellations related to COVID-19 (n=14) were omitted, VRE patients had a significantly higher rate of procedure cancellations compared to non-VRE patients (42.3% vs. 18.5%; p<0.01). Conclusions The overall endoscopy cancellation rate for VRE-colonized patients was higher than those who were non-VRE-colonized. We propose that this is likely secondary to the delays from unnecessary terminal cleans imposed for VRE-colonized patients and await for post-intervention data. Funding Agencies None
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Affiliation(s)
- J G Lee
- 1. University of British Columbia, Vancouver, BC, Canada
| | - G Ou
- 2. St. Paul, Vancouver, BC, Canada
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Lim SH, Go KS, Kwon EH, Pham HH, Nho NS, Kim KH, Lee JG, Park SY. Change of physical properties with the slurry-phase hydrocracking reaction of vacuum residue. J IND ENG CHEM 2021. [DOI: 10.1016/j.jiec.2021.03.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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9
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Ross MP, Venkateswara K, Hagedorn CA, Leupold CJ, Forsyth PWF, Wegner JD, Shaw EA, Lee JG, Gundlach JH. A low-frequency torsion pendulum with interferometric readout. Rev Sci Instrum 2021; 92:054502. [PMID: 34243344 DOI: 10.1063/5.0043098] [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] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 05/06/2021] [Indexed: 06/13/2023]
Abstract
We describe a torsion pendulum with a large mass-quadrupole moment and a resonant frequency of 2.8 mHz, whose angle is measured using a Michelson interferometer. The system achieved noise levels of ∼200prad/Hz between 0.2 and 30 Hz and ∼10prad/Hz above 100 Hz. Such a system can be applied to a broad range of fields from the study of rotational seismic motion and elastogravity signals to gravitational wave observation and tests of gravity.
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Affiliation(s)
- M P Ross
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
| | - K Venkateswara
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
| | - C A Hagedorn
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
| | - C J Leupold
- University of Washington Bothell, Bothell, Washington 98011, USA
| | - P W F Forsyth
- OzGrav-ANU, Centre for Gravitational Astrophysics, College of Science, The Australian National University, Acton, ACT, 2601, Australia
| | - J D Wegner
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
| | - E A Shaw
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
| | - J G Lee
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
| | - J H Gundlach
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
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10
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Lee JG, Nap-Hill E, Bressler B. A128 ACUTE GASTRIC VOLVULUS DISGUISED AS ACUTE CORONARY SYNDROME. J Can Assoc Gastroenterol 2021. [DOI: 10.1093/jcag/gwab002.126] [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
Acute gastric volvulus is a rare but potentially life-threatening condition that warrants emergent assessment. Its clinical presentation may encompass the Borchardt’s triad of vomiting, epigastric pain, and inability to insert a nasogastric tube. However, it can also present as chest pain and is often not cited within the typical differential diagnosis of non-cardiac causes of chest pain. We report the first known case of mesenterico-axial gastric volvulus presenting as acute coronary syndrome with a normal electrocardiogram, complete with radiographic and endoscopic images.
Aims
To present a case of acute gastric volvulus disguised as an acute coronary syndrome and describe its management.
Methods
Case report and review of literature.
Results
A 68 year-old female with history of recent coronary artery bypass graft surgery presented to hospital with sudden onset chest pain radiating to her left shoulder and jaw while having dinner. Initial high sensitivity troponin (normal <9ng/L) was 15ng/L, which increased to a modest peak at 115ng/L. ECG at presentation and through admission consistently showed normal sinus rhythm x 5. She was assessed by Cardiology and given her rising troponin and chest pain, she was treated as a non-ST elevation myocardial infarction with dual antiplatelet therapy. She underwent cardiac catheterization showing distal graft anastomotic site stenosis and was stented x2. Post procedure, her severe retrosternal chest pain recurred. GI was consulted for dysphagia and odynophagia, which was then noted to be present concurrent with her initial chest pain presentation.
An urgent CT scan of the abdomen and pelvis revealed acute mesenterico-axial gastric volvulus (Figure 1A), a rarer form of gastric volvulus in the adult population compared to its organo-axial counterpart. After a failed nasogastric decompression, an emergent upper endoscopy was attempted and demonstrated mucosal necrosis (Figure 1B) but was unsuccessful in relieving the volvulus. The patient then underwent overnight surgery, which showed gastric volvulus with contained perforation and 50% necrosis of the stomach with sparing of the cardia and antrum. This resulted in a subtotal gastrectomy, hiatus hernia repair, pyloromyotomy, jejunostomy, and bilateral chest tube insertion. She then recovered in ICU before being successfully discharged home from hospital.
Conclusions
Acute gastric volvulus can present while disguised as more common causes of chest pain, such as acute coronary syndrome. Those who present with chest pain who also have a history of a large hiatal hernia, or an intrathoracic stomach should be evaluated with gastric volvulus in the differential diagnosis as its prompt management is critical to reduce morbidity and mortality.
Funding Agencies
None
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Affiliation(s)
- J G Lee
- University of British Columbia, Vancouver, BC, Canada
| | - E Nap-Hill
- University of British Columbia, Vancouver, BC, Canada
| | - B Bressler
- Pacific Gastroenterology Associates, Vancouver, BC, Canada
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11
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Lee JG, Adelberger EG, Cook TS, Fleischer SM, Heckel BR. New Test of the Gravitational 1/r^{2} Law at Separations down to 52 μm. Phys Rev Lett 2020; 124:101101. [PMID: 32216404 DOI: 10.1103/physrevlett.124.101101] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 02/07/2020] [Indexed: 06/10/2023]
Abstract
We tested the gravitational 1/r^{2} law using a stationary torsion-balance detector and a rotating attractor containing test bodies with both 18-fold and 120-fold azimuthal symmetries that simultaneously tests the 1/r^{2} law at two different length scales. We took data at detector-attractor separations between 52 μm and 3.0 mm. Newtonian gravity gave an excellent fit to our data, limiting with 95% confidence any gravitational-strength Yukawa interactions to ranges <38.6 μm.
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Affiliation(s)
- J G Lee
- Center for Experimental Nuclear Physics and Astrophysics, Box 354290, University of Washington, Seattle, Washington 98195-4290 USA
| | - E G Adelberger
- Center for Experimental Nuclear Physics and Astrophysics, Box 354290, University of Washington, Seattle, Washington 98195-4290 USA
| | - T S Cook
- Center for Experimental Nuclear Physics and Astrophysics, Box 354290, University of Washington, Seattle, Washington 98195-4290 USA
| | - S M Fleischer
- Center for Experimental Nuclear Physics and Astrophysics, Box 354290, University of Washington, Seattle, Washington 98195-4290 USA
| | - B R Heckel
- Center for Experimental Nuclear Physics and Astrophysics, Box 354290, University of Washington, Seattle, Washington 98195-4290 USA
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12
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Lee JG, Telford JJ, Galorport C, Yonge J, Macdonnell CA, Gillies A, Chow R, Enns RA. A149 COMPARING THE REAL-WORLD EFFECTIVENESS OF 4L VERSUS 2L SPLIT COLONOSCOPY PREPARATIONS: PRELIMINARY DATA OF A SINGLE CENTRE EXPERIENCE THROUGH THE BRITISH COLUMBIA COLONOSCOPY SCREENING PROGRAM. J Can Assoc Gastroenterol 2020. [DOI: 10.1093/jcag/gwz047.148] [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
The British Columbia Colon Screening Program (CSP) is a population-based program offering biennial fecal immunochemical test (FIT) to individuals age 50–74 years with follow-up colonoscopy for a positive FIT as well as individuals with a personal history of neoplastic polyps or a high risk family history of colorectal cancer. Over 20,000 colonoscopies are performed annually. In December 2018, program colonoscopists in Vancouver, Canada agreed to switch from a 2L polyethylene glycol (PEG) preparation to a 4L PEG preparation after studies suggested superiority of the higher volume preparation in achieving adequate bowel cleansing and improving adenoma detection rates (ADR). High quality bowel cleansing is critical to minimize repeat procedures and maximize neoplasia detection.
Aims
To compare the quality of bowel preparation and neoplasia detection rates using the 4L high volume split preparation (HVSP) versus the 2L low volume split preparation (LVSP) in patients undergoing colonoscopy in the BC CSP.
Methods
A retrospective review of consecutive patients undergoing colonoscopy through the CSP at St. Paul’s Hospital from Dec 2017-Apr 2018 and Dec 2018-Apr 2019 was conducted. Inclusion criteria included: age 50–74, patients undergoing colonoscopy for any reason through the BC CSP. Variables collected included: patient demographics, bowel preparation qualty and pathologic findings. ADR and sessile serrated polyp detection rate (SSDR) were analyzed.
Results
462 colonoscopies were included, 280 in the LVSP group and 182 in the HVSP group. 8/280 (2.9%) had poor bowel preparation in the LVSP group, while 10/182 (5.5%) had poor bowel preparation in the HVSP group. The ADR and SSDR were 53.6% in LVSP vs. 50.0% in HVSP and 8.2% in LVSP vs. 8.8% in HVSP, respectively.
Conclusions
In this preliminary evaluation, the high volume PEG-based split preparation did not reduce the proportion of inadequate bowel preparations. Further evaluation of a larger number of colonoscopies is planned.
Funding Agencies
None
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Affiliation(s)
- J G Lee
- University of British Columbia, Vancouver, BC, Canada
| | - J J Telford
- University of British Columbia, Vancouver, BC, Canada
| | - C Galorport
- Medicine, Div. of Gastroenterology, St. Paul’s Hospital, Vancouver, BC, Canada
| | - J Yonge
- Medicine, Div. of Gastroenterology, St. Paul’s Hospital, Vancouver, BC, Canada
| | - C A Macdonnell
- Medicine, Div. of Gastroenterology, St. Paul’s Hospital, Vancouver, BC, Canada
| | - A Gillies
- Medicine, Div. of Gastroenterology, St. Paul’s Hospital, Vancouver, BC, Canada
| | - R Chow
- Medicine, Div. of Gastroenterology, St. Paul’s Hospital, Vancouver, BC, Canada
| | - R A Enns
- Medicine, Div. of Gastroenterology, St. Paul’s Hospital, Vancouver, BC, Canada
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13
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Kim CG, Kim KH, Pyo KH, Xin CF, Hong MH, Ahn BC, Kim Y, Choi SJ, Yoon HI, Lee JG, Lee CY, Park SY, Park SH, Cho BC, Shim HS, Shin EC, Kim HR. Hyperprogressive disease during PD-1/PD-L1 blockade in patients with non-small-cell lung cancer. Ann Oncol 2019; 30:1104-1113. [PMID: 30977778 DOI: 10.1093/annonc/mdz123] [Citation(s) in RCA: 176] [Impact Index Per Article: 35.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Immune checkpoint blockade with Programmed cell death 1 (PD-1)/PD-L1 inhibitors has been effective in various malignancies and is considered as a standard treatment modality for patients with non-small-cell lung cancer (NSCLC). However, emerging evidence show that PD-1/PD-L1 blockade can lead to hyperprogressive disease (HPD), a flair-up of tumor growth linked to dismal prognosis. This study aimed to evaluate the incidence of HPD and identify the determinants associated with HPD in patients with NSCLC treated with PD-1/PD-L1 blockade. PATIENTS AND METHODS We enrolled patients with recurrent and/or metastatic NSCLC treated with PD-1/PD-L1 inhibitors between April 2014 and November 2018. Clinicopathologic variables, dynamics of tumor growth, and treatment outcomes were analyzed in patients with NSCLC who received PD-1/PD-L1 blockade. HPD was defined according to tumor growth kinetics (TGK), tumor growth rate (TGR), and time to treatment failure (TTF). Immunophenotyping of peripheral blood CD8+ T lymphocytes was conducted to explore the potential predictive biomarkers of HPD. RESULTS A total of 263 patients were analyzed. HPD was observed in 55 (20.9%), 54 (20.5%), and 98 (37.3%) patients according to the TGK, TGR, and TTF. HPD meeting both TGK and TGR criteria was associated with worse progression-free survival [hazard ratio (HR) 4.619; 95% confidence interval (CI) 2.868-7.440] and overall survival (HR, 5.079; 95% CI, 3.136-8.226) than progressive disease without HPD. There were no clinicopathologic variables specific for HPD. In the exploratory biomarker analysis with peripheral blood CD8+ T lymphocytes, a lower frequency of effector/memory subsets (CCR7-CD45RA- T cells among the total CD8+ T cells) and a higher frequency of severely exhausted populations (TIGIT+ T cells among PD-1+CD8+ T cells) were associated with HPD and inferior survival rate. CONCLUSION HPD is common in NSCLC patients treated with PD-1/PD-L1 inhibitors. Biomarkers derived from rationally designed analysis may successfully predict HPD and worse outcomes, meriting further investigation of HPD.
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Affiliation(s)
- C G Kim
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon; Division of Medical Oncology, Department of Internal Medicine
| | - K H Kim
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon; Department of Radiation Oncology, Yonsei Cancer Center, Yonsei University College of Medicine, Seoul
| | - K-H Pyo
- Division of Medical Oncology, Department of Internal Medicine; JE-UK Institute for Cancer Research, JEUK Co. Ltd, Gumi
| | - C-F Xin
- JE-UK Institute for Cancer Research, JEUK Co. Ltd, Gumi
| | - M H Hong
- Division of Medical Oncology, Department of Internal Medicine
| | - B-C Ahn
- Division of Medical Oncology, Department of Internal Medicine
| | - Y Kim
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon
| | - S J Choi
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon
| | - H I Yoon
- Department of Radiation Oncology, Yonsei Cancer Center, Yonsei University College of Medicine, Seoul
| | - J G Lee
- Department of Thoracic and Cardiovascular Surgery
| | - C Y Lee
- Department of Thoracic and Cardiovascular Surgery
| | - S Y Park
- Department of Thoracic and Cardiovascular Surgery
| | - S-H Park
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon
| | - B C Cho
- Division of Medical Oncology, Department of Internal Medicine
| | - H S Shim
- Department of Pathology, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea.
| | - E-C Shin
- Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon.
| | - H R Kim
- Division of Medical Oncology, Department of Internal Medicine.
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14
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Lee JG, Yoshida EM, Ho F, Lowe C, Sum V, Kwan P. A190 SEROPREVALENCE OF HEPATITIS B VIRUS IN ASIAN CANADIANS WHO ARE UNAWARE OF THEIR HBV STATUS IN GREATER VANACOUVER. J Can Assoc Gastroenterol 2019. [DOI: 10.1093/jcag/gwz006.189] [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: 11/13/2022] Open
Affiliation(s)
- J G Lee
- University of British Columbia, Vancouver, BC, Canada
| | - E M Yoshida
- Division of Gastroenterology, University of British Columbia, Vancouver, BC, Canada
| | - F Ho
- University of British Columbia, Vancouver, BC, Canada
| | - C Lowe
- University of British Columbia, Vancouver, BC, Canada
| | - V Sum
- Division of Gastroenterology, University of British Columbia, Vancouver, BC, Canada
| | - P Kwan
- Division of Gastroenterology, University of British Columbia, Vancouver, BC, Canada
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15
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Lee KH, Han SH, Yong D, Paik HC, Lee JG, Kim MS, Joo DJ, Choi JS, Kim SI, Kim YS, Park MS, Kim SY, Yoon YN, Kang S, Jeong SJ, Choi JY, Song YG, Kim JM. Acquisition of Carbapenemase-Producing Enterobacteriaceae in Solid Organ Transplantation Recipients. Transplant Proc 2019; 50:3748-3755. [PMID: 30577266 DOI: 10.1016/j.transproceed.2018.01.058] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Accepted: 01/23/2018] [Indexed: 02/07/2023]
Abstract
BACKGROUND Carbapenemase-producing Enterobacteriaceae (CPE) can lead to life-threatening outcomes with rapid spread of the carbapenemase gene in solid organ transplantation (SOT) recipients because of limitations of available antibiotics. We examined the characteristics and importance of CPE acquisition in SOT recipients with large numbers of CPE isolates. METHODS Between November 2015 and October 2016, 584 CPE isolates were found in 37 recipients and verified by carbapenemase gene multiplex polymerase chain reaction (PCR). One hundred recipients with at least 2 negative results in carbapenemase PCR for stool surveillance and no CPE isolates in clinical samples were retrospectively included. RESULTS Most CPE isolates were Klebsiella pneumoniae carbapenemase (KPC)-producing K. pneumoniae (546, 93.5%). The most frequent transplantation organ was lung (43.3%), and the most common sample with CPE isolates other than stool was respiratory tract (22.6%). The median time between SOT and first CPE acquisition was 7 days. All-cause mortality was significantly higher in recipients with CPE than in those without CPE (24.3% vs 10.0%; P = .03). In multivariate regression analysis, stool colonization of vancomycin-resistant Enterococci and/or Clostridium difficile during 30 days before SOT (odds ratio [OR], 3.28; 95% CI, 1.24-8.68; P = .02), lung transplantation (OR, 4.50; 95% CI, 1.19-17.03; P = .03), and intensive care unit stay ≥2 weeks (OR, 6.21; 95% CI, 1.72-22.45; P = .005) were associated with acquisition of CPE. CONCLUSIONS Early posttransplantation CPE acquisition may affect the clinical outcome of SOT recipients. Careful screening for CPE during the early posttransplantation period would be meaningful in recipients with risk factors.
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Affiliation(s)
- K H Lee
- Division of Infectious Disease, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - S H Han
- Division of Infectious Disease, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea.
| | - D Yong
- Department of Laboratory Medicine and Research Institute of Bacterial Resistance, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - H C Paik
- Department of Thoracic and Cardiovascular Surgery, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - J G Lee
- Department of Thoracic and Cardiovascular Surgery, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - M S Kim
- Department of Transplantation Surgery and Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - D J Joo
- Department of Transplantation Surgery and Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - J S Choi
- Department of Transplantation Surgery and Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - S I Kim
- Department of Transplantation Surgery and Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Y S Kim
- Department of Transplantation Surgery and Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - M S Park
- Division of Pulmonology and Critical Care Medicine, Department of Internal Medicine, Institute of Chest Diseases, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - S Y Kim
- Division of Pulmonology and Critical Care Medicine, Department of Internal Medicine, Institute of Chest Diseases, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Y N Yoon
- Department of Cardiothoracic Surgery, Cardiovascular Center, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - S Kang
- Division of Cardiology, Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - S J Jeong
- Division of Infectious Disease, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - J Y Choi
- Division of Infectious Disease, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Y G Song
- Division of Infectious Disease, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - J M Kim
- Division of Infectious Disease, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
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16
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Kim BG, Uhm JS, Yang PS, Yu HT, Kim TH, Joung BY, Pak HN, Kim SY, Kim MS, Lee JG, Paik HC, Lee MH. P2884Clinical significance of postoperative atrial arrhythmias in patients who underwent lung transplantation. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p2884] [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: 11/13/2022] Open
Affiliation(s)
- B G Kim
- Inje University, Division of Cardiology, Department of Internal Medicine, Seoul Paik Hospital, Seoul, Korea Republic of
| | - J.-S Uhm
- Severance Hospital, Cardiology, Seoul, Korea Republic of
| | - P.-S Yang
- Severance Hospital, Cardiology, Seoul, Korea Republic of
| | - H T Yu
- Severance Hospital, Cardiology, Seoul, Korea Republic of
| | - T.-H Kim
- Severance Hospital, Cardiology, Seoul, Korea Republic of
| | - B Y Joung
- Severance Hospital, Cardiology, Seoul, Korea Republic of
| | - H.-N Pak
- Severance Hospital, Cardiology, Seoul, Korea Republic of
| | - S Y Kim
- Severance Hospital, Pulmonology, Seoul, Korea Republic of
| | - M S Kim
- Severance Hospital, Pulmonology, Seoul, Korea Republic of
| | - J G Lee
- Severance Hospital, Thoracic and Cardiovascular Surgery, Seoul, Korea Republic of
| | - H C Paik
- Severance Hospital, Thoracic and Cardiovascular Surgery, Seoul, Korea Republic of
| | - M.-H Lee
- Severance Hospital, Cardiology, Seoul, Korea Republic of
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17
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Song SH, Lim SH, Lee J, Lee JG, Huh KH, Kim SI, Kim YS, Kim MS. Impact of Korea Network for Organ Sharing Expanded Donor Criteria on Delayed Graft Fuction in Kidney Transplantation: A Single-Center Experience. Transplant Proc 2018; 50:2363-2367. [PMID: 29801964 DOI: 10.1016/j.transproceed.2018.04.046] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Revised: 03/15/2018] [Accepted: 04/09/2018] [Indexed: 11/19/2022]
Abstract
BACKGROUND The shortage of donor organs has been a major challenge in transplantation. In an effort to reduce the donor shortage, kidney transplantation (KT) using expanded criteria donors (ECD) was encouraged. In Korea, transplantation centers used the Korea Network for Organ Sharing (KONOS) ECD criteria, which is different from the United Network for Organ Sharing (UNOS) criteria. The aim of this study is to evaluate the predictive power of KONOS criteria on delayed graft function (DGF) in comparison to UNOS criteria. METHODS A total of 376 recipients who underwent deceased donor kidney transplantation between January 2005 and December 2014 at Severance Hospital were retrospectively reviewed. Of these, 130 cases satisfied KONOS ECD, while the others followed KONOS standard criteria donor (SCD). RESULTS Donor age and history of hypertension was significantly higher with KONOS ECD than with KONOS SCD. In KONOS subgroup analysis, donor characteristics were different than with UNOS criteria. The incidence of DGF was higher in the KONOS ECD group than in the KONOS SCD group. However, UNOS ECD showed a high incidence of DGF compared to UNOS SCD with the same KONOS criteria. UNOS ECD was an independent risk factor for DGF in multivariate analysis. However, KONOS ECD was not a risk factor for DGF. Although glomerular filtration rate was inferior in the KONOS ECD group compared to the KONOS SCD group, the UNOS SCD group within the KONOS ECD group showed similar graft function compared to the KONOS SCD group. CONCLUSION KONOS criteria have a lower predictive power for DGF than UNOS criteria.
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Affiliation(s)
- S H Song
- Department of Surgery, College of Medicine, Ewha Womans University, Seoul, Republic of Korea
| | - S H Lim
- Department of Surgery, Severance Hospital, Yonsei University Health Sysmtem, Seoul, Republic of Korea
| | - J Lee
- Department of Surgery, Severance Hospital, Yonsei University Health Sysmtem, Seoul, Republic of Korea
| | - J G Lee
- Department of Surgery, Severance Hospital, Yonsei University Health Sysmtem, Seoul, Republic of Korea; The Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - K H Huh
- Department of Surgery, Severance Hospital, Yonsei University Health Sysmtem, Seoul, Republic of Korea; The Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - S I Kim
- Department of Surgery, Severance Hospital, Yonsei University Health Sysmtem, Seoul, Republic of Korea; The Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Y S Kim
- Department of Surgery, Severance Hospital, Yonsei University Health Sysmtem, Seoul, Republic of Korea; The Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - M S Kim
- Department of Surgery, Severance Hospital, Yonsei University Health Sysmtem, Seoul, Republic of Korea; The Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea.
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18
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Lee JG, Kim SY, Kim YT, Lee HJ, Park S, Choi SM, Kim DH, Cho WH, Yeo HJ, Park S, Choi SH, Hong SB, Shim TS, Jo KW, Jeon K, Jeong BH, Paik HC. First Report of the Korean Lung Transplantation Registry. Transplant Proc 2018; 50:2759-2763. [PMID: 30401392 DOI: 10.1016/j.transproceed.2018.02.185] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 02/26/2018] [Indexed: 10/17/2022]
Abstract
BACKGROUND The Korean Organ Transplantation Registry (KOTRY) began to register lung transplants in 2015. This is an initial report on the status of patients receiving lung transplants over the past 2 years. METHODS We analyzed a total of 69 patients who received lung transplants in 2015 and 2016 and who registered with the KOTRY. RESULTS The 69 patients were treated in 5 institutions. The average (SD) donor age was 39.2 (12.6) years; there were 40 male patients. The average (SD) recipient age was 55.7 (10.0) years, and the number of male recipients was 46. A total of 66 patients underwent bilateral lung transplantation, 3 underwent single-lung transplantation, and 1 underwent simultaneous heart-lung transplantation. The most frequent indication for lung transplantation was idiopathic pulmonary fibrosis (35 patients), followed by connective tissue disease-related interstitial lung disease (9) and acute respiratory failure (8). Prior to transplantation, 23 patients required ventilator care, and 12 required extracorporeal membrane oxygenation while on the waiting list. Episodes of acute rejection during follow-up were reported in 4, 2, 1, and 1 patients at 3, 6, 9, and 12 months, respectively. Infections requiring hospitalization were reported in 27, 10, 4, and 3 patients at 3, 6, 9, and 12 months, respectively. CONCLUSION The establishment of KOTRY renders it possible to collect nationwide data on lung transplantation, improving research on the topic and clarifying clinical feasibility.
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Affiliation(s)
- J G Lee
- Department of Thoracic and Cardiovascular Surgery, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - S Y Kim
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Y T Kim
- Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - H J Lee
- Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - S Park
- Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - S M Choi
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea
| | - D H Kim
- Department of Thoracic and Cardiovascular Surgery, YangSan Hospital, Pusan National University, Gyeongsangnam-do, Korea
| | - W H Cho
- Department of Pulmonology and Critical Care Medicine, YangSan Hospital, Pusan National University, Gyeongsangnam-do, Korea
| | - H J Yeo
- Department of Pulmonology and Critical Care Medicine, YangSan Hospital, Pusan National University, Gyeongsangnam-do, Korea
| | - S Park
- Department of Thoracic and Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - S H Choi
- Department of Thoracic and Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - S-B Hong
- Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - T S Shim
- Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - K-W Jo
- Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - K Jeon
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - B-H Jeong
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - H C Paik
- Department of Thoracic and Cardiovascular Surgery, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
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Lee JG, Galorport C, Enns RA. A211 OUTCOME OF CAPSULE ENDOSCOPY IN THE SETTING OF IRON DEFICIENCY ANEMIA IN PATIENTS ABOVE AGE 65. J Can Assoc Gastroenterol 2018. [DOI: 10.1093/jcag/gwy009.211] [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 G Lee
- Department of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - C Galorport
- Department of Medicine, Division of Gastroenterology, St Paul’s Hospital, University of British Columbia, Vancouver, BC, Canada
| | - R A Enns
- Department of Medicine, Division of Gastroenterology, St Paul’s Hospital, University of British Columbia, Vancouver, BC, Canada
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20
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Kim HR, Kang HN, Shim HS, Kim EY, Kim J, Kim DJ, Lee JG, Lee CY, Hong MH, Kim SM, Kim H, Pyo KH, Yun MR, Park HJ, Han JY, Youn HA, Ahn MJ, Paik S, Kim TM, Cho BC. Co-clinical trials demonstrate predictive biomarkers for dovitinib, an FGFR inhibitor, in lung squamous cell carcinoma. Ann Oncol 2018; 28:1250-1259. [PMID: 28460066 DOI: 10.1093/annonc/mdx098] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Background We conducted co-clinical trials in patient-derived xenograft (PDX) models to identify predictive biomarkers for the multikinase inhibitor dovitinib in lung squamous cell carcinoma (LSCC). Methods The PDX01-02 were established from LSCC patients enrolled in the phase II trial of dovitinib (NCT01861197) and PDX03-05 were established from LSCC patients receiving surgery. These five PDX tumors were subjected to in vivo test of dovitinib efficacy, whole exome sequencing and gene expression profiling. Results The PDX tumors recapitulate histopathological properties and maintain genomic characteristics of originating tumors. Concordant with clinical outcomes of the trial enrolled-LSCC patients, dovitinib produced substantial tumor regression in PDX-01 and PDX-05, whereas it resulted in tumor progression in PDX-02. PDX-03 and -04 also displayed poor antitumor efficacy to dovitinib. Mutational and genome-wide copy number profiles revealed no correlation between genomic alterations of FGFR1-3 and sensitivity to dovitinib. Of note, gene expression profiles revealed differentially expressed genes including FGF3 and FGF19 between PDX-01 and 05 and PDX-02-04. Pathway analysis identified two FGFR signaling-related gene sets, FGFR ligand binding/activation and SHC-mediated cascade pathway were substantially up-regulated in PDX-01 and 05, compared with PDX-02-04. The comparison of gene expression profiles between dovitinib-sensitive versus -resistant lung cancer cell lines in the Cancer Cell Line Encyclopedia database also found that transcriptional activation of 18 key signaling components in FGFR pathways can predict the sensitivity to dovitinib both in cell lines and PDX tumors. These results highlight FGFR pathway activation as a key molecular determinant for sensitivity to dovitinib. Conclusions FGFR gene expression signatures are predictors for the response to dovitinib in LSCC.
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Affiliation(s)
- H R Kim
- Division of Medical Oncology, Yonsei Cancer Center, Yonsei University College of Medicine, Seoul
| | - H N Kang
- JE-UK Institute for Cancer Research, JEUK Co, Ltd, Gumi-City, Kyungbuk
| | | | - E Y Kim
- Pulmonology, Yonsei University College of Medicine, Seoul
| | - J Kim
- Department of Radiology, Severance Hospital, Yonsei University College of Medicine, Seoul
| | - D J Kim
- Department of Thoracic and Cardiovascular Surgery, Yonsei University College of Medicine, Seoul
| | - J G Lee
- Department of Thoracic and Cardiovascular Surgery, Yonsei University College of Medicine, Seoul
| | - C Y Lee
- Department of Thoracic and Cardiovascular Surgery, Yonsei University College of Medicine, Seoul
| | - M H Hong
- Division of Medical Oncology, Yonsei Cancer Center, Yonsei University College of Medicine, Seoul
| | - S-M Kim
- JE-UK Institute for Cancer Research, JEUK Co, Ltd, Gumi-City, Kyungbuk
| | - H Kim
- JE-UK Institute for Cancer Research, JEUK Co, Ltd, Gumi-City, Kyungbuk
| | - K-H Pyo
- JE-UK Institute for Cancer Research, JEUK Co, Ltd, Gumi-City, Kyungbuk
| | - M R Yun
- JE-UK Institute for Cancer Research, JEUK Co, Ltd, Gumi-City, Kyungbuk
| | - H J Park
- JE-UK Institute for Cancer Research, JEUK Co, Ltd, Gumi-City, Kyungbuk
| | - J Y Han
- JE-UK Institute for Cancer Research, JEUK Co, Ltd, Gumi-City, Kyungbuk
| | - H A Youn
- JE-UK Institute for Cancer Research, JEUK Co, Ltd, Gumi-City, Kyungbuk
| | - M-J Ahn
- Division of Hematology & Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - S Paik
- Severance Biomedical Science Institute, Yonsei University College of Medicine, Seoul
| | - T-M Kim
- Department of Medical Informatics, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - B C Cho
- Division of Medical Oncology, Yonsei Cancer Center, Yonsei University College of Medicine, Seoul.,JE-UK Institute for Cancer Research, JEUK Co, Ltd, Gumi-City, Kyungbuk
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Yun YM, Seo MW, Ra HW, Yoon SJ, Mun TY, Moon JH, Kook JW, Kim YK, Lee JG, Kim JH. Gasification characteristics of glass fiber-reinforced plastic (GFRP) wastes in a microwave plasma reactor. KOREAN J CHEM ENG 2017. [DOI: 10.1007/s11814-017-0168-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Kim BS, Lee JG, Cho Y, Song SH, Huh KH, Kim MS, Kim YS. Reduction of Slit Diaphragm-associated Molecules by Sirolimus: Is it Enough to Induce Proteinuria? Transplant Proc 2017; 49:1165-1169. [PMID: 28583549 DOI: 10.1016/j.transproceed.2017.03.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Sirolimus (SRL), a mammalian target of rapamycin inhibitor, is widely used in transplantation, but the mechanisms whereby it induces adverse effects, such as proteinuria and edema, remain unclear. To determine whether isolated SRL induces proteinuria or not, the authors intraperitoneally injected C57BL/6 mice with different doses of SRL (0 mg/[kg·d], 3 mg/[kg·d], 10 mg/[kg·d], or 30 mg/[kg·d]) for 24 days. Urinary albumin excretion was then quantified using a double-sandwich enzyme-linked immunosorbent assay, and serum creatinine levels were measured using a single dry-film chemistry auto-analyzer. The mRNA expression levels of various genes were also measured by polymerase chain reaction. Urinary albumin was not detected in the SRL-treated mice, but serum creatinine levels were found to increase dose-dependently and were significantly higher in the animals treated with 30 mg/kg of SRL than in untreated controls. Glomerular mRNA expression profiling showed down-regulations of podocyte-related genes (Wilms tumor 1, synaptopodin, nephrin, CD2-associated protein, and podocin) and of transforming growth factor-beta (a marker of fibrosis) in sirolimus-treated mice. In addition, expressions of the antiapoptotic genes Bcl-2 and Bcl-xL were also down-regulated. Furthermore, the protein levels of these genes in mice kidney were also decreased by sirolimus. Although sirolimus treatment reduced the expressions of slit diaphragm-associated molecules and increased serum creatinine levels, it failed to induce proteinuria. Our findings indicate that proteinuria is not induced by isolated SRL treatment. Further studies are required to identify conditions in which sirolimus induces proteinuria.
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Affiliation(s)
- B S Kim
- The Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea; Division of Nephrolgy, Department of Internal Medicine, Severance Hospital, Yonsei University Health System, Seoul, Republic of Korea
| | - J G Lee
- The Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea; Department of Transplantation Surgery, Severance Hospital, Yonsei University Health System, Seoul, Republic of Korea
| | - Y Cho
- The Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - S H Song
- The Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea; Department of Transplantation Surgery, Severance Hospital, Yonsei University Health System, Seoul, Republic of Korea
| | - K H Huh
- The Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea; Department of Transplantation Surgery, Severance Hospital, Yonsei University Health System, Seoul, Republic of Korea
| | - M S Kim
- The Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea; Department of Transplantation Surgery, Severance Hospital, Yonsei University Health System, Seoul, Republic of Korea
| | - Y S Kim
- The Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea; Department of Transplantation Surgery, Severance Hospital, Yonsei University Health System, Seoul, Republic of Korea.
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Choy YH, Lee JG, Mahboob A, Choi TJ, Rho SH. Genetic correlation between live body measurements and beef cutability traits in Hanwoo steers. Asian-Australas J Anim Sci 2017; 30:1074-1080. [PMID: 28335095 PMCID: PMC5494479 DOI: 10.5713/ajas.16.0692] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Revised: 12/01/2016] [Accepted: 02/25/2017] [Indexed: 11/27/2022]
Abstract
Objective The growth, carcass and retail cut yield records on 1,428 Hanwoo steers obtained through progeny testing were analyzed in this study, and their heritability and genetic relationships among the traits were estimated using animal models. Methods Two different models were compared in this study. Each model was fitted for different fixed class effects, date of slaughter for carcass traits and batch of progeny test live measurement traits, and a choice of covariates (carcass weight in Model 1 or backfat thickness in Model 2) for carcass traits. Results The differences in body composition among individuals were deemed being unaffected by their age at slaughter, except for carcass weight and backfat thickness. Heritability estimates of body size measurements were 0.21 to 0.36. Heritability estimates of retail cut percentage were high (0.56 from Model 1 and 0.47 from Model 2). And the heritability estimates for loin muscle percentage were 0.36 from Model 1 and 0.42 from Model 2, which were high enough to consider direct selection on carcass cutability traits as effective. The genetic correlations between body size measurements and retail cut ratio (RCR) were close to zero. But, some negative genetic correlations were found with chest girths measured at yearling (Model 1) or at 24 months of age or with chest widths. Loin muscle ratio (LMR) was genetically negatively correlated with body weights or body size measurements, in general in Model 1. These relationships were low close to zero but positive in Model 2. Phenotypic correlation between cutability traits (RCR, LMR) and live body size measurements were moderate and negative in Model 1 while those in Model 2 were all close to zero. Conclusion Therefore, the body weights or linear body measurements at an earlier age may not be the most desirable selection traits for exploitation of correlated responses to improve loin muscle or lean meat yield.
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Affiliation(s)
- Yun Ho Choy
- Division of Animal Breeding & Genetics, National Institute of Animal Science, Cheonan 31000, Korea
| | - Jae Goo Lee
- Division of Animal Breeding & Genetics, National Institute of Animal Science, Cheonan 31000, Korea
| | - Alam Mahboob
- Division of Animal Breeding & Genetics, National Institute of Animal Science, Cheonan 31000, Korea
| | - Tae Jeong Choi
- Division of Animal Breeding & Genetics, National Institute of Animal Science, Cheonan 31000, Korea
| | - Seung Hee Rho
- Hanwoo Improvement Center, National Agricultural Cooperative Federation, Seosan 31948, Korea
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Ryu S, Park S, Lee JH, Kim YR, Na HS, Lim HS, Choi HY, Hwang IY, Lee JG, Park ZW, Oh WY, Kim JM, Choi SE. A Study on CYP2C19 and CYP2D6 Polymorphic Effects on Pharmacokinetics and Pharmacodynamics of Amitriptyline in Healthy Koreans. Clin Transl Sci 2017; 10:93-101. [PMID: 28296334 PMCID: PMC5355968 DOI: 10.1111/cts.12451] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Accepted: 01/13/2017] [Indexed: 12/16/2022] Open
Abstract
We performed a double-blinded, genotype-based stratification study to explore the pharmacokinetics and pharmacodynamics of amitriptyline according to CYP2C19 and CYP2D6 genotype in Korean subjects. Twenty-four healthy adults were grouped by genotype of CYP2C19 and CYP2D6. After a single dose of 25 mg of amitriptyline, blood samples were collected and anticholinergic effects were measured. The extent of N-demethylation of amitriptyline significantly decreased in subjects carrying two nonfunctional alleles of CYP2C19. The extent of hydroxylation of amitriptyline or nortriptyline was significantly reduced in subjects carrying two CYP2D6 decreased functional alleles compared with those with no or one decreased functional allele. The overall metabolic pathway of amitriptyline was more likely to be dominated by CYP2C19 than CYP2D6. The gene variations of CYP2C19 and CYP2D6 did not change the pharmacodynamic effect. The findings of this study will provide useful information on individualized drug treatment with amitriptyline considering both CYP2D6 and CYP2C19 gene variations.
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Affiliation(s)
- S Ryu
- Clinical Research Division, National Institute of Food and Drug Safety, Ministry of Food and Drug Safety, Republic of Korea
| | - S Park
- Clinical Research Division, National Institute of Food and Drug Safety, Ministry of Food and Drug Safety, Republic of Korea
| | - J H Lee
- Clinical Research Division, National Institute of Food and Drug Safety, Ministry of Food and Drug Safety, Republic of Korea
| | - Y R Kim
- Clinical Research Division, National Institute of Food and Drug Safety, Ministry of Food and Drug Safety, Republic of Korea
| | - H S Na
- Clinical Research Division, National Institute of Food and Drug Safety, Ministry of Food and Drug Safety, Republic of Korea
| | - H S Lim
- Department of Clinical Pharmacology and Therapeutics, College of Medicine, University of Ulsan, Asan Medical Center, Republic of Korea
| | - H Y Choi
- Department of Clinical Pharmacology and Therapeutics, College of Medicine, University of Ulsan, Asan Medical Center, Republic of Korea
| | - I Y Hwang
- Clinical Research Division, National Institute of Food and Drug Safety, Ministry of Food and Drug Safety, Republic of Korea
| | - J G Lee
- Clinical Research Division, National Institute of Food and Drug Safety, Ministry of Food and Drug Safety, Republic of Korea
| | - Z W Park
- Clinical Research Division, National Institute of Food and Drug Safety, Ministry of Food and Drug Safety, Republic of Korea
| | - W Y Oh
- Clinical Research Division, National Institute of Food and Drug Safety, Ministry of Food and Drug Safety, Republic of Korea
| | - J M Kim
- Clinical Research Division, National Institute of Food and Drug Safety, Ministry of Food and Drug Safety, Republic of Korea
| | - S E Choi
- Clinical Research Division, National Institute of Food and Drug Safety, Ministry of Food and Drug Safety, Republic of Korea
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Cho WC, Kim HJ, Lee HI, Seo MW, Ra HW, Yoon SJ, Mun TY, Kim YK, Kim JH, Kim BH, Kook JW, Yoo CY, Lee JG, Choi JW. 5L-Scale Magnesio-Milling Reduction of Nanostructured SiO 2 for High Capacity Silicon Anodes in Lithium-Ion Batteries. Nano Lett 2016; 16:7261-7269. [PMID: 27775893 DOI: 10.1021/acs.nanolett.6b03762] [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] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Nanostructured silicon (Si) is useful in many applications and has typically been synthesized by bottom-up colloid-based solution processes or top-down gas phase reactions at high temperatures. These methods, however, suffer from toxic precursors, low yields, and impractical processing conditions (i.e., high pressure). The magnesiothermic reduction of silicon oxide (SiO2) has also been introduced as an alternative method. Here, we demonstrate the reduction of SiO2 by a simple milling process using a lab-scale planetary-ball mill and industry-scale attrition-mill. Moreover, an ignition point where the reduction begins was consistently observed for the milling processes, which could be used to accurately monitor and control the reaction. The complete conversion of rice husk SiO2 to high purity Si was demonstrated, taking advantage of the rice husk's uniform nanoporosity and global availability, using a 5L-scale attrition-mill. The resulting porous Si showed excellent performance as a Li-ion battery anode, retaining 82.8% of the initial capacity of 1466 mAh g-1 after 200 cycles.
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Affiliation(s)
- Won Chul Cho
- Korea Institute of Energy Research (KIER) , 152 Gajeong-ro, Yuesong-gu, Daejeon 34129, Republic of Korea
- Department of Advanced Energy and Technology, Korea University of Science and Technology , 217 Gajeong-ro, Yuesong-gu, Daejeon 34113, Republic of Korea
| | - Hye Jin Kim
- Graduate School of Energy, Environment, Water, and Sustainability (EEWS) and KAIST Institute NanoCentury, Korea Advanced Institute of Science and Technology (KAIST) , 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Hae In Lee
- Korea Institute of Energy Research (KIER) , 152 Gajeong-ro, Yuesong-gu, Daejeon 34129, Republic of Korea
| | - Myung Won Seo
- Korea Institute of Energy Research (KIER) , 152 Gajeong-ro, Yuesong-gu, Daejeon 34129, Republic of Korea
- Department of Advanced Energy and Technology, Korea University of Science and Technology , 217 Gajeong-ro, Yuesong-gu, Daejeon 34113, Republic of Korea
| | - Ho Won Ra
- Korea Institute of Energy Research (KIER) , 152 Gajeong-ro, Yuesong-gu, Daejeon 34129, Republic of Korea
| | - Sang Jun Yoon
- Korea Institute of Energy Research (KIER) , 152 Gajeong-ro, Yuesong-gu, Daejeon 34129, Republic of Korea
- Department of Advanced Energy and Technology, Korea University of Science and Technology , 217 Gajeong-ro, Yuesong-gu, Daejeon 34113, Republic of Korea
| | - Tae Young Mun
- Korea Institute of Energy Research (KIER) , 152 Gajeong-ro, Yuesong-gu, Daejeon 34129, Republic of Korea
| | - Yong Ku Kim
- Korea Institute of Energy Research (KIER) , 152 Gajeong-ro, Yuesong-gu, Daejeon 34129, Republic of Korea
| | - Jae Ho Kim
- Korea Institute of Energy Research (KIER) , 152 Gajeong-ro, Yuesong-gu, Daejeon 34129, Republic of Korea
- Department of Advanced Energy and Technology, Korea University of Science and Technology , 217 Gajeong-ro, Yuesong-gu, Daejeon 34113, Republic of Korea
| | - Bo Hwa Kim
- Korea Institute of Energy Research (KIER) , 152 Gajeong-ro, Yuesong-gu, Daejeon 34129, Republic of Korea
| | - Jin Woo Kook
- Korea Institute of Energy Research (KIER) , 152 Gajeong-ro, Yuesong-gu, Daejeon 34129, Republic of Korea
| | - Chung-Yul Yoo
- Korea Institute of Energy Research (KIER) , 152 Gajeong-ro, Yuesong-gu, Daejeon 34129, Republic of Korea
| | - Jae Goo Lee
- Korea Institute of Energy Research (KIER) , 152 Gajeong-ro, Yuesong-gu, Daejeon 34129, Republic of Korea
- Department of Advanced Energy and Technology, Korea University of Science and Technology , 217 Gajeong-ro, Yuesong-gu, Daejeon 34113, Republic of Korea
| | - Jang Wook Choi
- Graduate School of Energy, Environment, Water, and Sustainability (EEWS) and KAIST Institute NanoCentury, Korea Advanced Institute of Science and Technology (KAIST) , 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
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Kim BH, Seo MW, Kook JW, Choi HM, Ra HW, Yoon SJ, Mun TY, Kim YK, Lee JG, Rhee YW. Flow Behavior and Mixing Characteristics of Rice Husk/Silica Sand/Rice Husk Ash. Korean Chemical Engineering Research 2016. [DOI: 10.9713/kcer.2016.54.4.533] [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: 11/23/2022]
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Lee PB, Kim YC, Lim YJ, Lee CJ, Choi SS, Park SH, Lee JG, Lee SC. Efficacy of Pulsed Electromagnetic Therapy for Chronic Lower Back Pain: A Randomized, Double-blind, Placebo-controlled Study. J Int Med Res 2016; 34:160-7. [PMID: 16749411 DOI: 10.1177/147323000603400205] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
This randomized, double-blind, placebo-controlled clinical trial studied the effectiveness of pulsed electromagnetic therapy (PEMT) in patients with chronic lower back pain. Active PEMT ( n = 17) or placebo treatment ( n = 19) was performed three times a week for 3 weeks. Patients were assessed using a numerical rating scale (NRS) and revised Oswestry disability scores for 4 weeks after therapy. PEMT produced significant pain reduction throughout the observation period compared with baseline values. The percentage change in the NRS score from baseline was significantly greater in the PEMT group than the placebo group at all three time-points measured. The mean revised Oswestry disability percentage after 4 weeks was significantly improved from the baseline value in the PEMT group, whereas there were no significant differences in the placebo group. In conclusion, PEMT reduced pain and disability and appears to be a potentially useful therapeutic tool for the conservative management of chronic lower back pain.
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Affiliation(s)
- P B Lee
- Department of Anesthesiology and Pain Medicine, Seoul National University College of Medicine, Seoul, Korea
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Kim TH, You HW, Park JH, Lee JG, Choo MS, Park WH, Lee JZ, Park CH, Na YG, Kwon DD, Lee KS. Persistence of solifenacin therapy in patients with overactive bladder in the clinical setting: a prospective, multicenter, observational study. Int J Clin Pract 2016; 70:351-7. [PMID: 27028673 DOI: 10.1111/ijcp.12783] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
OBJECTIVES The aim of this study was to evaluate the persistence with solifenacin therapy over a 12-month period in patients with overactive bladder (OAB). METHODS This is a 52-week long, multicenter, prospective, observational study. The subjects were individuals ≥ 18 years old with OAB symptoms for ≥ 3 months, characterised by a total OAB Symptom Score (OABSS) of ≥ 3 and OABSS urgency item score of ≥ 2. Patients were prescribed 5 mg or 10 mg of solifenacin once daily for OAB symptoms. Drug persistence, reasons for discontinuation and factors related to the persistence were evaluated. RESULTS A total of 1018 patients (329 men, 689 women) with a mean age of 59 years were included. The 52-week drug persistence rate was 22.1%. The drug persistence rates at 12, 24 and 36 weeks were 72.4%, 45.8% and 31.1% respectively. The three most common reasons for discontinuing therapy included symptom improvement in 30.4%, lack of efficacy in 13.4%, and a switch to another antimuscarinic agent in 10.8%. Older patients (odds ratio = 1.02, 95% CI: 1.01-1.04), and female patients (odds ratio = 1.94, 95% CI: 1.37-2.75) were more likely to continue the medication over the 12-month period than were younger, male patients. The number of nocturia episodes was negatively correlated with drug persistence (odds ratio = 0.83, 95% CI: 0.71-0.97). CONCLUSIONS There was low persistence (22%) to solifenacin therapy for OAB symptoms over a 12-month period. Older patients, female patients and those with fewer episodes of nocturia were more persistent to therapy than were others.
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Affiliation(s)
- T H Kim
- Department of Urology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - H W You
- Department of Urology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - J H Park
- Department of Urology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - J G Lee
- Department of Urology, Korea University College of Medicine, Seoul, Korea
| | - M-S Choo
- Department of Urology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
| | - W H Park
- Department of Urology, Inha University College of Medicine, Incheon, Korea
| | - J Z Lee
- Department of Urology, Pusan National University Hospital, Pusan, Korea
| | - C H Park
- Department of Urology, Keimyung University School of Medicine, Daegu, Korea
| | - Y G Na
- Department of Urology, Chungnam National University School of Medicine, Daejeon, Korea
| | - D D Kwon
- Department of Urology, Chonnam National University Medical School, Gwangju, Korea
| | - K-S Lee
- Department of Urology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
- Department of Medical Device Management & Research, SAIHST, Sungkyunkwan University, Seoul, Korea
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Choi TJ, Alam M, Cho CI, Lee JG, Park B, Kim S, Koo Y, Roh SH. Genetic parameters for yearling weight, carcass traits, and primal-cut yields of Hanwoo cattle. J Anim Sci 2016; 93:1511-21. [PMID: 26020173 DOI: 10.2527/jas.2014-7953] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Genetic parameters associated with yearling weight, carcass traits, and primal-cut yields of male Hanwoo cattle were investigated using univariate and bivariate animal models. The mean yearling weight (YWT), carcass weight (CWT), longissimus muscle area (LMA), backfat thickness (BFT), and marbling score (MS) were 352.47 ± 0.40 kg, 337.39 ± 0.64 kg, 78.28 ± 0.13 cm2, 8.45 ± 0.05 mm, and 3.25 ± 0.03, respectively. Total primal-cut yield (TPC) was 78.95 ± 0.10% of CWT, of which 42.3% was contributed by the forequarters (chuck, CHK; shoulder, SLD; ribs, RIB; and brisket and flank, BAF). Loins, top round (TRND), and round (RND) were associated with yields of 13.57%, 5.45 ± 0.01%, and 8.87 ± 0.02%, respectively. The largest cut studied was ribs (15.67 ± 0.03%). The estimated heritabilities (h2) of YWT, CWT, LMA, BFT, and MS were 0.18 ± 0.02, 0.29 ± 0.04, 0.38 ± 0.05, 0.45 ± 0.05, and 0.62 ± 0.07, respectively. Shoulder yield was highly heritable in Hanwoo steers (0.83 ± 0.13), followed by the yields of round (0.66 ± 0.12), striploin (0.64 ± 0.12), top round (0.62 ± 0.12), sirloin (0.60 ± 0.12), and total primal-cut yield (0.52 ± 0.11). The h2 values of CHK, BAF, RIB, and tenderloin (TLN) ranged from 0.19 ± 0.09 to 0.41 ± 0.11. Generally, the genetic CV was low for most traits (2.33%-6.15%), except for CHK, BFT, and MS. The genetic correlation (rg) was strong between YWT and CWT (0.77 ± 0.06). The greatest positive and negative rg among carcass traits were those between LMA and CWT (0.52 ± 0.08) and between LMA and BFT (-0.30 ± 0.09), respectively. The correlation between CHK and SLD (0.81 ± 0.14), and those between SLD, TLN, TRND, and RND, were mostly strong (0.77-0.87), but the rg between RIB and other traits were strongly negative. The TPC yield showed moderate to high rg with most primal cuts. The YWT, CWT, and LMA correlated notably with CHK, SLD, and loin yields, especially LMA. However, BFT and MS were negatively correlated with many primal cuts but RIB. Those rg estimates were also opposite of that of LMA and CWT with primal cuts. Phenotypic correlations (rp) were generally weaker than rg estimates. The rp of YWT, CWT, and LMA were either zero or moderately negative compared to those of the BFT and MS with primal cuts. Most primal cuts yielded positive rp estimates among them, except for RIB. Our results suggest that direct selection for YWT, various carcass traits, and primal-cut yields may increase the carcass value of Hanwoo males.
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Kim HJ, Choi S, Lee SJ, Seo MW, Lee JG, Deniz E, Lee YJ, Kim EK, Choi JW. Controlled Prelithiation of Silicon Monoxide for High Performance Lithium-Ion Rechargeable Full Cells. Nano Lett 2016; 16:282-288. [PMID: 26694703 DOI: 10.1021/acs.nanolett.5b03776] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Despite the recent considerable progress, the reversibility and cycle life of silicon anodes in lithium-ion batteries are yet to be improved further to meet the commercial standards. The current major industry, instead, adopts silicon monoxide (SiOx, x ≈ 1), as this phase can accommodate the volume change of embedded Si nanodomains via the silicon oxide matrix. However, the poor Coulombic efficiencies (CEs) in the early period of cycling limit the content of SiOx, usually below 10 wt % in a composite electrode with graphite. Here, we introduce a scalable but delicate prelithiation scheme based on electrical shorting with lithium metal foil. The accurate shorting time and voltage monitoring allow a fine-tuning on the degree of prelithiation without lithium plating, to a level that the CEs in the first three cycles reach 94.9%, 95.7%, and 97.2%. The excellent reversibility enables robust full-cell operations in pairing with an emerging nickel-rich layered cathode, Li[Ni0.8Co0.15Al0.05]O2, even at a commercial level of initial areal capacity of 2.4 mAh cm(-2), leading to a full cell energy density 1.5-times as high as that of graphite-LiCoO2 counterpart in terms of the active material weight.
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Affiliation(s)
| | | | | | - Myung Won Seo
- Climate Change Research Division, Korea Institute of Energy Research (KIER) , 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea
| | - Jae Goo Lee
- Climate Change Research Division, Korea Institute of Energy Research (KIER) , 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea
| | - Erhan Deniz
- Department of Chemistry and Earth Sciences, College of Arts and Sciences, Qatar University , P.O. Box 2713, Doha, Qatar
| | - Yong Ju Lee
- Battery Research and Development, LG Chem, LTd. , Research Park 104-1, Moonji-dong, Yuseong-gu, Daejeon 305-380, Republic of Korea
| | - Eun Kyung Kim
- Battery Research and Development, LG Chem, LTd. , Research Park 104-1, Moonji-dong, Yuseong-gu, Daejeon 305-380, Republic of Korea
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Terrano WA, Adelberger EG, Lee JG, Heckel BR. Short-Range, Spin-Dependent Interactions of Electrons: A Probe for Exotic Pseudo-Goldstone Bosons. Phys Rev Lett 2015; 115:201801. [PMID: 26613430 DOI: 10.1103/physrevlett.115.201801] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Indexed: 06/05/2023]
Abstract
We used a torsion pendulum and rotating attractor with 20-pole electron-spin distributions to probe dipole-dipole interactions mediated by exotic pseudo-Goldstone bosons with m(b)c(2)≤500 μeV and coupling strengths up to 14 orders of magnitude weaker than electromagnetism. This corresponds to symmetry-breaking scales F≤70 TeV, the highest reached in any laboratory experiment. We used an attractor with a 20-pole unpolarized mass distribution to improve laboratory bounds on CP-violating monopole-dipole forces with 1.5 μeV<m(b)c(2)<400 μeV by up to a factor of 1000.
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Affiliation(s)
- W A Terrano
- Center for Experimental Nuclear Physics and Astrophysics, Box 354290, University of Washington, Seattle, Washington 98195-4290, USA
| | - E G Adelberger
- Center for Experimental Nuclear Physics and Astrophysics, Box 354290, University of Washington, Seattle, Washington 98195-4290, USA
| | - J G Lee
- Center for Experimental Nuclear Physics and Astrophysics, Box 354290, University of Washington, Seattle, Washington 98195-4290, USA
| | - B R Heckel
- Center for Experimental Nuclear Physics and Astrophysics, Box 354290, University of Washington, Seattle, Washington 98195-4290, USA
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Hahn SY, Hahn SM, Jin SL, Kim HS, Lyu CJ, Lee JG, Han JW. Huge retroperitoneal complicated pseudotumour in haemophilia B with inhibitor. Haemophilia 2015; 22:e45-7. [PMID: 26459955 DOI: 10.1111/hae.12799] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/19/2015] [Indexed: 11/30/2022]
Affiliation(s)
- S Y Hahn
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, Yonsei University College of Medicine, Yonsei University Health System, Seoul, Korea.,Department of Pediatric Hemato-Oncology, Yonsei Cancer Center, Yonsei University Health System, Seoul, Korea
| | - S M Hahn
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, Yonsei University College of Medicine, Yonsei University Health System, Seoul, Korea.,Department of Pediatric Hemato-Oncology, Yonsei Cancer Center, Yonsei University Health System, Seoul, Korea
| | - S L Jin
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, Yonsei University College of Medicine, Yonsei University Health System, Seoul, Korea.,Department of Pediatric Hemato-Oncology, Yonsei Cancer Center, Yonsei University Health System, Seoul, Korea
| | - H S Kim
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, Yonsei University College of Medicine, Yonsei University Health System, Seoul, Korea.,Department of Pediatric Hemato-Oncology, Yonsei Cancer Center, Yonsei University Health System, Seoul, Korea
| | - C J Lyu
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, Yonsei University College of Medicine, Yonsei University Health System, Seoul, Korea.,Department of Pediatric Hemato-Oncology, Yonsei Cancer Center, Yonsei University Health System, Seoul, Korea
| | - J G Lee
- Department of Surgery, Yonsei University College of Medicine, Yonsei University Health System, Seoul, Korea
| | - J W Han
- Division of Pediatric Hematology and Oncology, Department of Pediatrics, Yonsei University College of Medicine, Yonsei University Health System, Seoul, Korea.,Department of Pediatric Hemato-Oncology, Yonsei Cancer Center, Yonsei University Health System, Seoul, Korea
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Samarasena JB, Ahluwalia A, Tarnawski AS, Shinoura S, Choi KD, Lee JG, Chang KJ. Expression of nerve growth factor, its TrkA receptor, and several neuropeptides in porcine esophagus. Implications for interactions between neural, vascular and epithelial components of the esophagus. J Physiol Pharmacol 2015; 66:415-20. [PMID: 26084223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Accepted: 04/16/2015] [Indexed: 02/06/2023]
Abstract
UNLABELLED This study was aimed to determine the expression and localization of nerve growth factor (NGF) and several neural peptides in porcine esophagus. Transmural esophageal specimens were obtained from euthanized pigs. STUDIES 1) histologic evaluation, 2) expressions of NGF and its tropomyosin receptor kinase A (TrkA) receptor, calcitonin generelated peptide (CGRP), neuronal nitric oxide synthase (nNOS), and neuronal enolase using immunostaining and quantification of signal distribution and intensity. Immunostaining for NGF, CGRP, nNOS and neuronal specific enolase (NSE) showed their strong and differential expression and localization in the neuronal network. NGF was strongly expressed in the majority of neurons and nerves, distribution of TrkA was complementary; its signal was 1.5-fold weaker P < 0.001 than NGF). Quantitatively the signal intensity was: CGRP > nNOS > NGF > NES > TrkA. In addition to neural structures, nNOS, NGF and TrkA were expressed in keratinocyte progenitor cells of esophageal mucosa and in endothelial cells of blood vessels. We conclude that a strong expression of NGF in majority of esophageal neurons and nerves indicates important, but previously unrecognized regulatory roles in the esophagus; 2) This study showed expression of NGF and some of the neuropeptides in neural elements, keratinocyte progenitor cells and endothelial cells of blood vessels, which indicates local interactions between neural, epithelial and endothelial cells.
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Affiliation(s)
- J B Samarasena
- Division of Gastroenterology and Hepatology, Department of Medicine, University of California - Irvine, Orange, California, USA
| | - A Ahluwalia
- Division of Gastroenterology, Department of Medicine, Long Beach Veterans Affairs Healthcare System, Long Beach, California, USA
| | - A S Tarnawski
- Division of Gastroenterology and Hepatology, Department of Medicine, University of California - Irvine, Orange, California, USA
- Division of Gastroenterology, Department of Medicine, Long Beach Veterans Affairs Healthcare System, Long Beach, California, USA
| | - S Shinoura
- Division of Gastroenterology and Hepatology, Department of Medicine, University of California - Irvine, Orange, California, USA
| | - K D Choi
- Division of Gastroenterology and Hepatology, Department of Medicine, University of California - Irvine, Orange, California, USA
| | - J G Lee
- Division of Gastroenterology and Hepatology, Department of Medicine, University of California - Irvine, Orange, California, USA
| | - K J Chang
- Division of Gastroenterology and Hepatology, Department of Medicine, University of California - Irvine, Orange, California, USA.
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Lee HN, Lee KS, Kim JC, Chung BH, Kim CS, Lee JG, Kim DK, Park CH, Park JK, Hong SJ. Rate and associated factors of solifenacin add-on after tamsulosin monotherapy in men with voiding and storage lower urinary tract symptoms. Int J Clin Pract 2015; 69:444-53. [PMID: 25363606 DOI: 10.1111/ijcp.12581] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Accepted: 09/29/2014] [Indexed: 11/27/2022] Open
Abstract
AIM To explore the rate of add-on therapy with solifenacin in men with voiding and storage lower urinary tract symptoms (LUTS) after tamsulosin monotherapy and to explore predictive factors for starting solifenacin add-on therapy. METHODS Men aged ≥ 45 years with IPSS ≥ 12 and symptoms of OAB (OAB-V8 ≥ 8, micturition ≥ 8/24 h, urgency ≥ 2/24 h) were enrolled to receive tamsulosin 0.2 mg once daily. After 4 weeks, men with residual symptoms of OAB and reported 'dissatisfied' or 'a little satisfied' were received solifenacin 5 mg in combination with tamsulosin monotherapy. Subjects completed an IPSS, a Quality of life (QoL) index, OAB V8, and an International Consultation of Incontinence Questionnaire (ICIQ)-Male LUTS, and patient perception of bladder condition (PPBC) at baseline and week 4. RESULTS Of a total of 305 patients, 254 patients completed 4 weeks of tamsulosin treatment. For 176 patients, solifenacin was added (69.3%). Significant predictive factors of solifenacin add-on therapy included long LUTS duration, high IPSS, number of micturitions per 24 h, more urgency episodes, high urgency severity score in a voiding diary and high OAB V8 score. Based on multivariable analysis, potential predictive factors of solifenacin add-on therapy included long LUTS duration (OR = 1.008, 95% CI: 1.001-1.014), high serum PSA (OR = 1.543, 95% CI: 1.136-2.095) and small prostate size (OR = 0.970, 95% CI: 0.947-0.994) (p < 0.05). IPSS, daytime micturitions and urgency episodes, OAB V8 scores, ICIQ and PPBC were improved after tamsulosin monotherapy. CONCLUSIONS Two thirds of men with voiding and storage LUTS needed to add anticholinergics after 4 weeks of tamsulosin monotherapy. Patients with longer lasting symptoms and storage symptoms with small prostate volume may require the anticholinergic add-on.
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Affiliation(s)
- H N Lee
- Department of Urology, Seoul Seonam Hospital, Ewha Womans University, Seoul, Korea
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Lee YS, Lee KS, Kim JC, Hong S, Chung BH, Kim CS, Lee JG, Kim DK, Park CH, Park JK. Persistence with solifenacin add-on therapy in men with benign prostate obstruction and residual symptoms of overactive bladder after tamsulosin monotherapy. Int J Clin Pract 2014; 68:1496-502. [PMID: 25284747 DOI: 10.1111/ijcp.12483] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
AIMS In spite of the reported efficacy and safety of antimuscarinics in men with OAB (overactive bladder) and BPO (benign prostatic obstruction), many patients do not persist with the treatment. We aimed to evaluate persistence and the reasons for the discontinuation of solifenacin add-on therapy in men with residual symptoms of OAB after tamsulosin monotherapy for BPO in a real clinical environment. METHODS Men aged ≥ 45 years with IPSS ≥ 12 and symptoms of OAB (OAB-V8 ≥ 8, micturition ≥ 8/24 h, urgency ≥ 2/24 h) were prescribed tamsulosin 0.2 mg. After 4 weeks, men who had residual symptoms of OAB (OAB-V8 ≥ 8, micturition ≥ 8/24 h, urgency ≥ 1/24 h) and reported that they were 'dissatisfied' or 'a little satisfied' with the therapy were enrolled and prescribed solifenacin 5 mg in combination with tamsulosin. After 52 weeks, persistence and the reasons for the discontinuation of solifenacin were evaluated. Factors related to persistence were analysed. RESULTS Of the 305 men who had been treated with tamsulosin, 176 were prescribed solifenacin. After 52 weeks, 44 (25%) remained on solifenacin therapy. Of the 132 who discontinued solifenacin, 85 were evaluated on the reason for discontinuation. The three most common reasons for discontinuation were adverse events (AEs) (35%), lack of efficacy (33%), and improvement in symptoms (16%). The aggravation of voiding symptoms was the most common AE leading to discontinuation. Retention was observed in 11 men. None of the demographical or clinical characteristics were significantly related to persistence. CONCLUSIONS Only 25% men with OAB and BPO remained on antimuscarinic add-on therapy after 1 year, mostly because of AEs and lack of efficacy. Realistic data should be added to what is already known about antimuscarinic treatment in men by including patients who were excluded or who dropped out of well-designed clinical trials.
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Affiliation(s)
- Y-S Lee
- Department of Urology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea
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Dan DT, Gannavarapu B, Lee JG, Chang K, Muthusamy VR. Removable esophageal stents have poor efficacy for the treatment of refractory benign esophageal strictures (RBES). Dis Esophagus 2014; 27:511-7. [PMID: 23121426 DOI: 10.1111/j.1442-2050.2012.01432.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
With the recent availability of removable esophageal stents, endoscopic stenting has been utilized to treat refractory benign esophageal strictures (RBES). The objective of this study was to review the feasibility and effectiveness of removable esophageal stents to treat RBES. Patients who received removable esophageal stents for the treatment of RBES at the institution between 2004-2010 using its stent implantation logs and endoscopic database were retrospectively identified. Patient demographics, stricture etiology and location, stent and procedure characteristics, and clinical outcomes were obtained. Twenty-five patients with a mean age of 70 (72% male) underwent initial stent placement; 24 were successful. Overall clinical success was achieved in five of the 19 patients (26%) ultimately undergoing stent removal. RBES etiologies included anastomotic (13), radiation (5), peptic (3), chemotherapy (1), scleroderma (1), and unknown (2). Alimaxx-E (Merit-Endotek, South Jordan, UT, USA) stents were placed in 20 patients and Polyflex (Boston Scientific, Natick, MA, USA) stents were used in five patients. Immediate complications included failed deployment (1) and chest pain (7). Five patients died prior to stent removal. Stent migration was found in 53% (10/19) of patients who underwent stent removal: nine required additional therapy and one had symptom resolution. Out of the nine patients without stent migration, five required additional therapy and four had symptom resolution. Although placement of removable esophageal stents for RBES is technically feasible, it is frequently complicated by stent migration and chest pain. In addition, few patients achieved long-term stricture resolution after initial stenting. In this study, most patients ultimately required repeated stenting and/or dilations to maintain relief of dysphagia.
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Affiliation(s)
- D T Dan
- H.H. Chao Comprehensive Digestive Disease Center, Division of Gastroenterology, Department of Medicine, University of California, Irvine Medical Center, Orange, California, USA
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Omand J, Darling PB, O'Connor DL, Parkin PC, Birken CS, Lee JG, Thorpe KE, Maguire JL. 102: Validation of a Vitamin D Dietary Intake Screening Questionnaire in Young Children. Paediatr Child Health 2014. [DOI: 10.1093/pch/19.6.e35-100] [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: 11/13/2022] Open
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Jeong HM, Seo MW, Jeong SM, Na BK, Yoon SJ, Lee JG, Lee WJ. Pyrolysis kinetics of coking coal mixed with biomass under non-isothermal and isothermal conditions. Bioresour Technol 2014; 155:442-445. [PMID: 24472746 DOI: 10.1016/j.biortech.2014.01.005] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Revised: 12/30/2013] [Accepted: 01/03/2014] [Indexed: 06/03/2023]
Abstract
To investigate the kinetic characteristics of coking coal mixed with biomass during pyrolysis, thermogravimetric (TG) and thermo-balance reactor (TBR) analyses were conducted under non-isothermal and isothermal condition. Yellow poplar as a biomass (B) was mixed with weak coking coal (WC) and hard coking coal (HC), respectively. The calculated activation energies of WC/B blends were higher than those of HC/B blends under non-isothermal and isothermal conditions. The coal/biomass blends show increased reactivity and decreased activation energy with increasing biomass blend ratio, regardless of the coking properties of the coal. The different char structures of the WC/B and HC/B blends were analyzed by BET and SEM.
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Affiliation(s)
- Ha Myung Jeong
- Department of Chemical Engineering, Chungbuk National University, 52 Naesudong-ro, Heungdeok-gu, Cheong ju 361-763, Republic of Korea
| | - Myung Won Seo
- Clean Fuel Laboratory, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea
| | - Sang Mun Jeong
- Department of Chemical Engineering, Chungbuk National University, 52 Naesudong-ro, Heungdeok-gu, Cheong ju 361-763, Republic of Korea.
| | - Byung Ki Na
- Department of Chemical Engineering, Chungbuk National University, 52 Naesudong-ro, Heungdeok-gu, Cheong ju 361-763, Republic of Korea
| | - Sang Jun Yoon
- Clean Fuel Laboratory, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea
| | - Jae Goo Lee
- Clean Fuel Laboratory, Korea Institute of Energy Research (KIER), 152 Gajeong-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea
| | - Woon Jae Lee
- POSCO Technology Center, POSCO, 6261 Donghaean-ro, Nam-gu, Po hang 790-300, Republic of Korea
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Park C, Park J, Choo MS, Kim JC, Lee JG, Lee JZ, Lee KS, Kim DY, Lee SJ, Seo JT. A randomised, prospective double-blind, propiverine-controlled trial of imidafenacin in patients with overactive bladder. Int J Clin Pract 2014; 68:188-96. [PMID: 24373019 DOI: 10.1111/ijcp.12255] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Accepted: 07/16/2013] [Indexed: 01/04/2023] Open
Abstract
AIM To assess the efficacy and safety of imidafenacin compared with propiverine for treatment of overactive bladder (OAB) in Korean patients. MATERIALS AND METHODS Patients with OAB symptoms were randomised to double-blind treatment with 0.1 mg of imidafenacin twice daily (group A) or propiverine 20 mg once daily (group B) for 12-week regimen, and assessed for efficacy and safety. The primary efficacy outcome was per cent change of weekly urgency urinary incontinence (UUI) episodes at week 12. The secondary efficacy outcomes were changes in the micturitions per day, urine volume voided per micturition, urgency episodes per day, complete disappearance of incontinence episodes and severity of urgency from baseline to week 12. Quality of life and safety profiles were also compared. RESULTS Of 162 patients randomised, 140 completed the study protocol. The per cent change of weekly UUI episodes at week 12 was -69.1% in group A and -70.4% in group B (both p < 0.0001). The lower limit of 95% one-sided confidence interval of the difference between the groups was above the non-inferiority margin (-19.42%). Other voiding parameters and quality of life significantly improved at week 12 in both the groups. The discontinuation rates caused by adverse events were low in both the groups. While dry mouth was the most common adverse event (group A: 28.4% vs. B: 30.4%, p = 0.783), the severity of dry mouth was significantly less in the group A than B (p = 0.042) There were no significant differences in other safety profiles. CONCLUSIONS After the 12-week treatment of imidafenacin 0.1 mg twice daily, all OAB symptoms and quality of life improved. Imidafenacin was not inferior to propiverine for the reduction of UUI episodes, and was better tolerated than propiverine in the safety profile. Our results indicate that imidafenacin is a safe and effective drug in Korean patients with OAB.
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Affiliation(s)
- C Park
- Department of Urology, Gangneung Asan Medical Center, University of Ulsan College of Medicine, Gangneung, Korea
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Lee KS, Park B, Kim JH, Kim HG, Seo JT, Lee JG, Jang Y, Choo MS. A randomised, double-blind, parallel design, multi-institutional, non-inferiority phase IV trial of imidafenacin versus fesoterodine for overactive bladder. Int J Clin Pract 2013; 67:1317-26. [PMID: 24246210 DOI: 10.1111/ijcp.12272] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2013] [Revised: 07/10/2013] [Accepted: 07/29/2013] [Indexed: 02/03/2023] Open
Abstract
AIMS Our objective was to compare the efficacy and safety of imidafenacin over fesoterodine in patients with overactive bladder (OAB). METHODS This study is a randomised, double-blind, parallel-group, fesoterodine-controlled study in patients with continuous OAB symptoms for ≥ 3 months, daily mean voiding frequency (DMVF) ≥ 8, and daily mean urgency or urgency incontinence frequency ≥ 2. A twice-daily 0.1 mg imidafenacin with placebo, or once-daily 4 mg fesoterodine with placebo were administered for 12 weeks. The primary efficacy end-point was the difference in DMVF at 12 weeks. The secondary efficacy end-points were differences in daily mean: (i) voiding frequency at 4 and 8 weeks; (ii) urgency frequency; (iii) urgency incontinence frequency; (iv) incontinence frequency; (v) nocturia frequency; and (vi) quality of life score. The variables for safety analysis were adverse events, vital signs, residual urine volume and clinical laboratory tests. An efficacy analysis was conducted in per-protocol patients and the safety analysis was conducted in all randomised patients. RESULTS The differences in DMVF at 12 weeks were -3.38 ± 3.63 and -2.45 ± 3.73 in the imidafenacin and fesoterodine groups, respectively, and the difference was not significant between the two groups. Imidafenacin was non-inferior to fesoterodine, and the lower limit of 95% two-sided confidence intervals was -0.53. The other six secondary end-points and variables for safety analysis showed no difference between the two groups. CONCLUSIONS Imidafenacin was non-inferior to fesoterodine in terms of efficacy, and showed no significant difference in terms of safety.
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Affiliation(s)
- K-S Lee
- Department of Urology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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Iwashita T, Lee JG, Nakai Y, Samarasena JB, Chang KJ. Successful management of arterial bleeding complicating endoscopic ultrasound-guided cystogastrostomy using a covered metallic stent. Endoscopy 2013; 44 Suppl 2 UCTN:E370-1. [PMID: 23012027 DOI: 10.1055/s-0032-1310067] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [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: 12/10/2022]
Affiliation(s)
- T Iwashita
- HH Chao Comprehensive Digestive Disease Center, University of California Irvine, Orange, California, USA
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Kim SH, Choi YS, Lee JG, Park IH, Oh YJ. Effects of a 1:1 inspiratory to expiratory ratio on respiratory mechanics and oxygenation during one-lung ventilation in the lateral decubitus position. Anaesth Intensive Care 2012. [PMID: 23194211 DOI: 10.1177/0310057x1204000613] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Prolonged inspiratory to expiratory (I:E) ratio ventilation may have both positive and negative effects on respiratory mechanics and oxygenation during one-lung ventilation (OLV), but definitive information is currently lacking. We therefore compared the effects of volume-controlled ventilation with I:E ratios of 1:1 and 1:2 on respiratory mechanics and oxygenation during OLV. Fifty-six patients undergoing thoracoscopic lobectomy were randomly assigned volume-controlled ventilation with an I:E ratio of 1:1 (group 1:1, n=28) or 1:2 (group 1:2, n=28) during OLV. Arterial and central venous blood gas analyses and respiratory variables were recorded 15 minutes into two-lung ventilation, at 30 and 60 minutes during OLV, and 15 minutes after two-lung ventilation was re-initiated. Peak and plateau airway pressures in cmH2O [standard deviation] during OLV were significantly lower in group 1:1 than in group 1:2 (P <0.01) (19 [3] and 23 [4]; 16 [3] and 19 [5], respectively). The arterial to end-tidal carbon dioxide tension difference was significantly lower in group 1:1 than in group 1:2 (P <0.01), (0.5 [0.3] and 1.1 [0.5]). There were no significant differences in PaO2 during OLV between the two groups (OLV30, P=0.856; OLV60, P=0.473). In summary, volume-controlled ventilation with an I:E ratio of 1:1 reduced peak and plateau airway pressures improved dynamic compliance and efficiency of alveolar ventilation, but it did not improve arterial oxygenation in a substantial manner. Furthermore, the associated increase in mean airway pressure might have reduced cardiac output, resulting in a lower central venous oxygen saturation.
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Affiliation(s)
- S H Kim
- Department of Anaesthesiology and Pain Medicine, Anaesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul, Korea
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Kim JH, Park JY, Oh MM, Lee JG, Kwon SS, Bae JH. Treatment satisfaction with low-dose tamsulosin for symptomatic benign prostatic hyperplasia: results from a multicentre cross-sectional survey. Int J Clin Pract 2012; 66:1209-15. [PMID: 23163501 DOI: 10.1111/j.1742-1241.2012.02985.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
AIMS To evaluate the efficacy and treatment satisfaction with low-dose (0.2 mg) tamsulosin in patients with symptomatic benign prostatic hyperplasia (BPH), and to investigate individual lower urinary tract symptoms according to treatment satisfaction. METHODS A cross-sectional study was conducted in a total sample of 2574 patients from multiple centres. International Prostate Symptom Score (IPSS), prostate volume, uroflowmetry and combined medications were reviewed. Detailed questionnaires were used to assess treatment satisfaction and IPSS 8 weeks after treatment with low-dose tamsulosin. RESULTS After 8 weeks of treatment with low-dose tamsulosin, IPSS improved significantly. Among the 2574 patients, 1,630 (63.42%) were satisfied and 940 patients (36.50%) were dissatisfied with low-dose tamsulosin. The reasons for dissatisfaction included efficacy problems (84.66%) and side effects (3.72%). Treatment satisfaction was affected by symptom duration, baseline IPSS, and prostate size (p = 0.0441, < 0.001, < 0.009, respectively). IPSS voiding (IPSS-V) and IPSS storage (IPSS-S) after treatment differed significantly depending on the degree of satisfaction (p < 0.001). IPSS-V after treatment did not improve in patients who were 'not satisfied' or 'totally not satisfied' (p = 0.170, 0.240, respectively). All the individual IPSS items except urgency (p = 0.1436) varied significantly with the degree of satisfaction (p < 0.001). CONCLUSIONS Treating symptomatic BPH with low-dose tamsulosin improved IPSS, but more than one-third of patients were dissatisfied with the treatment. The main reason for dissatisfaction was efficacy problems, and the degree of satisfaction was related to symptom duration, baseline IPSS, and prostate size, and also to IPSS-V. In patients with severe LUTS, the tamsulosin dose should be increased earlier.
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Affiliation(s)
- J H Kim
- Department of Urology, Korea University Hospital, Korea University, College of Medicine, Seoul, Korea
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Nakai Y, Samarasena JB, Iwashita T, Park DH, Lee JG, Hu KQ, Chang KJ. Autoimmune hepatitis diagnosed by endoscopic ultrasound-guided liver biopsy using a new 19-gauge histology needle. Endoscopy 2012; 44 Suppl 2 UCTN:E67-8. [PMID: 22396285 DOI: 10.1055/s-0031-1291567] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [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: 12/29/2022]
Affiliation(s)
- Y Nakai
- H. H. Chao Comprehensive Digestive Center, University of California, Irvine Medical Center, Orange, California, USA
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Jang HA, Cho S, Kang SG, Ko YH, Kang SH, Bae JH, Cheon J, Kim JJ, Lee JG. The relaxant effect of ginseng saponin on the bladder and prostatic urethra: an in vitro and in vivo study. Urol Int 2012; 88:463-9. [PMID: 22507987 DOI: 10.1159/000337206] [Citation(s) in RCA: 5] [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: 09/28/2011] [Accepted: 02/13/2012] [Indexed: 11/19/2022]
Abstract
AIM To assess the effects of ginseng saponin on relaxation of the bladder and prostatic urethra and to determine its mechanism of action. MATERIALS AND METHODS For the in vitro study, prostatic urethra muscle strips were harvested from 18 male New Zealand rabbits. The strips were mounted in organ baths and connected to force displacement transducers. After stabilization, maximal tissue contractions were obtained by the application of phenylepinephrine to the urethra strips, and a dose-response curve for ginseng saponin was constructed (10(-6)-10(-2)M). After pretreatment of urethra strips with N-nitro-L-arginine methyl ester (L-NAME), another dose-response curve for ginseng saponin was constructed. For the in vivo study, we used adult male Sprague-Dawley rats divided into three groups [control, partial bladder outlet obstruction (PBOO) and saponin-fed groups], and we monitored the vesical pressure (P(ves)) and urethral perfusion pressure (UPP). RESULTS The ginseng saponin induced a significant dose-dependent relaxant effect on the prostatic urethra strips. A significant relaxant effect of ginseng saponin was observed from 10(-3)M, and ginseng saponin significantly relaxed urethra strips by 50.2 ± 20.26% at 10(-2)M. The relaxant effect was partially inhibited with L-NAME pretreatment. In the in vivo study, the change in UPP between baseline and relaxation was significantly higher in the saponin group than in the control or PBOO group (p < 0.001). The saponin group showed a significantly lower baseline P(ves) than the PBOO group. CONCLUSIONS We observed a significant relaxation effect of ginseng saponin on the bladder and prostatic urethra in both in vitro and in vivo studies. The mechanism by which ginseng saponin induces relaxation appears to involve the nitric oxide/nitric oxide synthase pathway.
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Affiliation(s)
- H A Jang
- Department of Urology, Korea University Hospital, Seoul, Republic of Korea
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Iwashita T, Lee JG, Shinoura S, Nakai Y, Park DH, Muthusamy VR, Chang KJ. Endoscopic ultrasound-guided rendezvous for biliary access after failed cannulation. Endoscopy 2012; 44:60-5. [PMID: 22127960 DOI: 10.1055/s-0030-1256871] [Citation(s) in RCA: 114] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
INTRODUCTION Selective cannulation fails in approximately 3 % of endoscopic retrograde cholangiography (ERC) procedures. An endoscopic ultrasound-guided rendezvous technique (EUS - RV) may salvage failed cannulation. The aims of the current study were to determine the safety and efficacy of EUS - RV. METHODS A total of 40 patients underwent salvage EUS - RV. EUS - RV was attempted immediately after failed biliary cannulation. A dilated intra- or extra-hepatic biliary duct (IHBD or EHBD) was punctured from the stomach or the small intestine under EUS guidance followed by cholangiography and antegrade manipulation of the guide wire into the small intestine. Finally, the echoendoscope was exchanged for an appropriate endoscope and biliary cannulation was achieved over or adjacent to the guide wire. RESULT EUS-RV appears safe and effective and may be considered as a primary salvage technique after failed cannulation. Antegrade manipulation of the guide wire into the small intestine was achieved in 29 of 40 patients (73 %; EHBD 25 /31 and IHBD 4/9). The reasons for failure were inability to advance the guide wire through an obstruction or a native ampulla. Re-attempt at ERC immediately after failed EUS - RV was made in seven of the 11 patients, and was successful in four. The remaining seven patients underwent percutaneous drainage within 3 days. Complications occurred in five patients (13 %), including pancreatitis, abdominal pain, pneumoperitoneum, and sepsis/death, which was unlikely to be related to the procedure. CONCLUSION EUS - RV is safe and effective and should be considered as a primary salvage technique after failed cannulation. Immediate re-attempt at ERC after failed EUS - RV is warranted, as EUS-guided cholangiogram can facilitate biliary cannulation in some cases. Finally, prompt alternative biliary drainage should be available.
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Affiliation(s)
- T Iwashita
- H.H. Chao Comprehensive Digestive Disease Center, University of California, Irvine Medical Center, Orange, California 92868, USA
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Deb GK, Dey SR, Bang JI, Lee JG, Kong IK. 9-cis Retinoic acid inhibits cumulus cell apoptosis during the maturation of bovine cumulus-oocyte-complexes. J Anim Sci 2011; 90:1798-806. [PMID: 22205673 DOI: 10.2527/jas.2011-4340] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Cumulus cell (CC) apoptosis is inversely correlated with embryonic development in vitro. Therefore, inhibition of CC apoptosis is important for proper embryonic development and quality. Retinoic acids (all-transRA and 9-cisRA) are natural components of retinoids, and 9-cisRA is the physiologically active metabolite of retinoic acid in vitro. During in vitro maturation, 9-cisRA enhances oocyte competence through multiple mechanisms affecting the oocyte and preimplantation embryo; however, the effect of 9-cisRA on CC apoptosis has yet to be elucidated. The aim of the present study was to evaluate the effect of 9-cisRA on CC apoptosis and to identify the molecular mechanism underlying that effect. Bovine slaughterhouse cumulus-oocyte complexes (COC) were matured in vitro in the absence or presence of 5 nM 9-cisRA. Cumulus cells were collected from immature and matured COC for the detection of apoptosis and gene expression analysis. Results showed that 9-cisRA reduced the number of apoptotic CC by about 2.7 fold (P < 0.023), compared with control. However, apoptosis is rare in CC of immature COC (0.01% ± 0.001). Transcripts involved in the caspase cascade were down-regulated upon exposure to 9-cisRA, including tumor necrosis factor alpha (TNF-α, 11.1 fold, P < 0.001), tumor necrosis factor alpha receptor 1 (TNFR1, 2.3 fold, P < 0.01), caspase 9 (CASP9, 2.0 fold, P < 0.031), caspase 8 (CASP8, 2.2 fold, P < 0.012), and caspase 3 (CASP3, 2.1 fold, P < 0.006), while antiapoptotic B-cell lymphoma 2 (BCL2) transcript was increased (3.1 fold, P < 0.004), compared with control. In addition, 9-cisRA inhibited mitogen activated protein kinase mRNA expression in CC, including extracellular signal-regulated kinase 1/2 (ERK1, 2.7 fold, P < 0.02; ERK2, 2.7 fold, P < 0.03), and c-Jun N-terminal kinase (JNK, 1.6 fold, P < 0.044), as well as the activator protein-1 (AP1) family members c-jun (1.6 fold, P < 0.041) and c-fos (2.0 fold, P < 0.06). The transcript abundances of TNF-α, TNFR1, CASP9, CASP8, CASP3, ERK1, ERK1, JNK, and BCL2 were increased, while c-fos and c-jun mRNA expression was decreased in the matured CC. On the basis of the data, we suggest that 9-cisRA inhibits CC apoptosis during in vitro maturation of bovine COC.
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Affiliation(s)
- G K Deb
- Division of Applied Life Science, Graduate School of Gyeongsang National University, Republic of Korea
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Kwon YH, Kim D, Li CG, Lee JK, Hong DS, Lee JG, Lee SH, Cho YH, Kim SH. Heat transfer and pressure drop characteristics of nanofluids in a plate heat exchanger. J Nanosci Nanotechnol 2011; 11:5769-5774. [PMID: 22121605 DOI: 10.1166/jnn.2011.4399] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In this paper, the heat transfer characteristics and pressure drop of the ZnO and Al2O3 nanofluids in a plate heat exchanger were studied. The experimental conditions were 100-500 Reynolds number and the respective volumetric flow rates. The working temperature of the heat exchanger was within 20-40 degrees C. The measured thermophysical properties, such as thermal conductivity and kinematic viscosity, were applied to the calculation of the convective heat transfer coefficient of the plate heat exchanger employing the ZnO and Al2O3 nanofluids made through a two-step method. According to the Reynolds number, the overall heat transfer coefficient for 6 vol% Al2O3 increased to 30% because at the given viscosity and density of the nanofluids, they did not have the same flow rates. At a given volumetric flow rate, however, the performance did not improve. After the nanofluids were placed in the plate heat exchanger, the experimental results pertaining to nanofluid efficiency seemed inauspicious.
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Affiliation(s)
- Y H Kwon
- School of Mechanical Engineering, Pusan National University, 609-735, Republic of Korea
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Kang SG, Park CH, Kim DK, Park JK, Hong SJ, Chung BH, Kim CS, Lee KS, Kim JC, Lee JG. Long-term outcome of tamsulosin for patients with lower urinary tract symptoms according to the treatment response defined by lower urinary tract symptom outcomes score. Int J Clin Pract 2011; 65:691-7. [PMID: 21564443 DOI: 10.1111/j.1742-1241.2011.02667.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
UNLABELLED IMS: To evaluate long-term outcome of tamsuolsin 0.2 mg for benign prostatic hyperplasia (BPH) patients using a new subjective assessment of patient-reported outcomes and the lower urinary tract symptoms (LUTS) outcome score (LOS) over a 48-week period. METHODS This study investigated the long-term outcomes of either well-responded or poorly responded patient group as defined by LOS at the period of 12 weeks after BPH treatment. Outcome parameters used in this study were the most bothersome symptoms, BPH K1-short form as well as International Prostate Symptom Score (IPSS), maximum flow rate (Qmax) and postvoiding residual urine volume at 24-, 36- and 48-week follow-up. RESULTS Of the 414 patients recruited initially, 310 (75.2%) were defined as the responders and 39 (9.5%) as the non-responders to the treatment at 12 weeks, which was stratified by LOS. In this long-term study, the differences in improvement rates of clinical parameters between responder and non-responder groups at 12 weeks of treatment were maintained over the period of 48 weeks. Among the responder patients, most (75.6%) chose continuous administrations of tamsulosin. Improvements in clinical parameters were maintained in this subgroup. It is noteworthy that the improvements in clinical parameters of the non-responder group were dismal despite switching to the other treatment modalities. CONCLUSIONS Long-term tamsulosin 0.2 mg for BPH patients is an effective treatment, both subjectively and objectively. Considering its integrative nature, LOS seemed to be one of the useful tools to predict the outcome after the management of LUTS.
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Affiliation(s)
- S G Kang
- Department of Urology, Korea University College of Medicine, Seoul, Korea
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