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Kwak HR, Byun HS, Hong SB, Choi HS, Manandhar HK, Timila RD, Joshi S, Baidya S. First Report of Cowpea Polerovirus 2 and Southern Cowpea Mosaic Virus Infecting Cowpea in Nepal. Plant Dis 2022; 106:PDIS06211323PDN. [PMID: 35100837 DOI: 10.1094/pdis-06-21-1323-pdn] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Affiliation(s)
- H-R Kwak
- Crop Protection Division, National Institute of Agricultural Sciences, Rural Development Administration, Wanju 55365, Republic of Korea
| | - H-S Byun
- Crop Protection Division, National Institute of Agricultural Sciences, Rural Development Administration, Wanju 55365, Republic of Korea
| | - S-B Hong
- Crop Protection Division, National Institute of Agricultural Sciences, Rural Development Administration, Wanju 55365, Republic of Korea
| | - H-S Choi
- Crop Protection Division, National Institute of Agricultural Sciences, Rural Development Administration, Wanju 55365, Republic of Korea
| | - H K Manandhar
- Nepal Plant Disease and Agro Associates, Balaju-Chakrapath, Kathmandu, Nepal
| | - R D Timila
- Nepal Plant Disease and Agro Associates, Balaju-Chakrapath, Kathmandu, Nepal
| | - S Joshi
- Nepal Plant Disease and Agro Associates, Balaju-Chakrapath, Kathmandu, Nepal
| | - S Baidya
- National Plant Pathology Research Centre, Nepal Agricultural Research Council, Khumaltar, Lalitpur, Nepal
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Byun HS, Choi HS, Kim HR, Kwak HR, Kil EJ, Kim M. First Report of Melon Aphid-Borne Yellows Virus Infecting Watermelon in Korea. Plant Dis 2022; 106:PDIS07211429PDN. [PMID: 34763520 DOI: 10.1094/pdis-07-21-1429-pdn] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Affiliation(s)
- H-S Byun
- Crop Protection Division, National Institute of Agricultural Sciences, Rural Development Administration, Wanju 55365, Republic of Korea
| | - H-S Choi
- Crop Protection Division, National Institute of Agricultural Sciences, Rural Development Administration, Wanju 55365, Republic of Korea
| | - H R Kim
- Crop Protection Division, National Institute of Agricultural Sciences, Rural Development Administration, Wanju 55365, Republic of Korea
| | - H-R Kwak
- Crop Protection Division, National Institute of Agricultural Sciences, Rural Development Administration, Wanju 55365, Republic of Korea
| | - E-J Kil
- Department of Plant Medicals, Andong National University, Andong 36729, Republic of Korea
| | - M Kim
- College of Agriculture, Life and Environment Sciences, Chungbuk National University, Cheongju 28644, Republic of Korea
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Sohn B, Park KY, Choi J, Koo JH, Han K, Joo B, Won SY, Cha J, Choi HS, Lee SK. Deep Learning-Based Software Improves Clinicians' Detection Sensitivity of Aneurysms on Brain TOF-MRA. AJNR Am J Neuroradiol 2021; 42:1769-1775. [PMID: 34385143 DOI: 10.3174/ajnr.a7242] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 05/05/2021] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE The detection of cerebral aneurysms on MRA is a challenging task. Recent studies have used deep learning-based software for automated detection of aneurysms on MRA and have reported high performance. The purpose of this study was to evaluate the incremental value of using deep learning-based software for the detection of aneurysms on MRA by 2 radiologists, a neurosurgeon, and a neurologist. MATERIALS AND METHODS TOF-MRA examinations of intracranial aneurysms were retrospectively extracted. Four physicians interpreted the MRA blindly. After a washout period, they interpreted MRA again using the software. Sensitivity and specificity per patient, sensitivity per lesion, and the number of false-positives per case were measured. Diagnostic performances, including subgroup analysis of lesions, were compared. Logistic regression with a generalized estimating equation was used. RESULTS A total of 332 patients were evaluated; 135 patients had positive findings with 169 lesions. With software assistance, patient-based sensitivity was statistically improved after the washout period (73.5% versus 86.5%, P < .001). The neurosurgeon and neurologist showed a significant increase in patient-based sensitivity with software assistance (74.8% versus 85.2%, P = .03, and 56.3% versus 84.4%, P < .001, respectively), while the number of false-positive cases did not increase significantly (23 versus 30, P = .20, and 22 versus 24, P = .75, respectively). CONCLUSIONS Software-aided reading showed significant incremental value in the sensitivity of clinicians in the detection of aneurysms on MRA without a significant increase in false-positive findings, especially for the neurosurgeon and neurologist. Software-aided reading showed equivocal value for the radiologist.
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Affiliation(s)
- B Sohn
- From the Department of Radiology (B.S., J.C., J.H.K., K.H., B.J., S.Y.W., J.C., H.S.C., S.-K.L.), Research Institute of Radiological Science and Center for Clinical Imaging Data Science, Yonsei University College of Medicine, Seoul, South Korea
| | - K-Y Park
- Department of Neurosurgery (K.-Y.P.), Yonsei University College of Medicine, Seoul, South Korea
| | - J Choi
- From the Department of Radiology (B.S., J.C., J.H.K., K.H., B.J., S.Y.W., J.C., H.S.C., S.-K.L.), Research Institute of Radiological Science and Center for Clinical Imaging Data Science, Yonsei University College of Medicine, Seoul, South Korea
- Department of Neurology (J.C.), Yonsei University College of Medicine, Seoul, South Korea
- Department of Neurology (J.C.), Seoul Medical Center, Seoul, South Korea
| | - J H Koo
- From the Department of Radiology (B.S., J.C., J.H.K., K.H., B.J., S.Y.W., J.C., H.S.C., S.-K.L.), Research Institute of Radiological Science and Center for Clinical Imaging Data Science, Yonsei University College of Medicine, Seoul, South Korea
| | - K Han
- From the Department of Radiology (B.S., J.C., J.H.K., K.H., B.J., S.Y.W., J.C., H.S.C., S.-K.L.), Research Institute of Radiological Science and Center for Clinical Imaging Data Science, Yonsei University College of Medicine, Seoul, South Korea
| | - B Joo
- From the Department of Radiology (B.S., J.C., J.H.K., K.H., B.J., S.Y.W., J.C., H.S.C., S.-K.L.), Research Institute of Radiological Science and Center for Clinical Imaging Data Science, Yonsei University College of Medicine, Seoul, South Korea
| | - S Y Won
- From the Department of Radiology (B.S., J.C., J.H.K., K.H., B.J., S.Y.W., J.C., H.S.C., S.-K.L.), Research Institute of Radiological Science and Center for Clinical Imaging Data Science, Yonsei University College of Medicine, Seoul, South Korea
| | - J Cha
- From the Department of Radiology (B.S., J.C., J.H.K., K.H., B.J., S.Y.W., J.C., H.S.C., S.-K.L.), Research Institute of Radiological Science and Center for Clinical Imaging Data Science, Yonsei University College of Medicine, Seoul, South Korea
| | - H S Choi
- From the Department of Radiology (B.S., J.C., J.H.K., K.H., B.J., S.Y.W., J.C., H.S.C., S.-K.L.), Research Institute of Radiological Science and Center for Clinical Imaging Data Science, Yonsei University College of Medicine, Seoul, South Korea
- Department of Radiology (H.S.C.), Seoul Medical Center, Seoul, South Korea
| | - S-K Lee
- From the Department of Radiology (B.S., J.C., J.H.K., K.H., B.J., S.Y.W., J.C., H.S.C., S.-K.L.), Research Institute of Radiological Science and Center for Clinical Imaging Data Science, Yonsei University College of Medicine, Seoul, South Korea
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Park EA, Kang KY, Lee JH, Lee JY, Kim HS, Choi HS, Song GY, Moon EH, Shiin MY, Hur YJ, Yu EJ, Kim R, Koong MK, Lee KA, Kim MJ. P–153 Comparison outcome of vitrified human embryos stored in vapor phase liquid nitrogen (LN2) and direct LN2. Hum Reprod 2021. [DOI: 10.1093/humrep/deab130.152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Study question
Is vapor cryopreserved LN2 storage beneficial for clinical outcomes of vitrified human embryos that are frozen compared to vitrified human embryos having direct contact with LN2.
Summary answer
There are no significant differences compared to clinical outcomes of human embryos stored in LN2 vapor and direct store in LN2.
What is known already
There has been concerned about potential cross-contamination and biohazard issues of embryos for long term storage using direct LN2. This study aimed to compare clinical outcomes of human embryos transfer between vapor phase and liquid LN2.
Study design, size, duration
The embryo has undergone vitrification for long term storage with vapor or direct contact in LN2. After the thawing of the embryo, we checked on the survival rates. We transferred only one or two embryos per patient and kept analyzing the implantation and pregnancy rates
Participants/materials, setting, methods
This retrospective study was carried out from January 2018 to December 2019 with 3272cycles 4713embryos; vitrified for long term storage in vapor phase or direct contact with LN2. We compared the clinical outcomes of frozen embryo transfer cycles using vitrified for long term storage in vapor phase and direct contact with LN2. Clinical outcomes monitored were embryo survival, subsequent implantation and pregnancy after single or double embryo transfer
Main results and the role of chance
A total of 4713 fertilized human embryos are vitrified and then stored in LN2 vapor (n = 2520 cycles) or direct contact LN2 (n = 752 cycles). The study showed that the blastocyst stored in vapor able to retain full development. Survival was 97.8% (vapor) and 97.6% (direct contact LN2), and the vapor storage of human embryos had no significant difference in survival rates after a long term storage. For single blastocyst transfer, pregnancy and implantation rates were 51.5%, 52.4% in vapor, 54.6%, 54.9% in direct LN2; respectively (p=NS). In double blastocyst transfer, the pregnancy and implantation rates were 61.8%, 42.0% in vapor and 64.7%, 44.5% in direct LN2; respectively (p=NS). There were also no significant differences between two groups.
Limitations, reasons for caution
The study showed that the blastocyst stored in vapor can retain full development. A vapor storage system thus is safe and effective for long term vapor storage of vitrified human embryos.Within the limits of this study, there was no detection of an adverse effect of vapor storage.
Wider implications of the findings: Vapor storage systems thus represent a useful alternative for safe and effective long-term storage of vitrified human embryos that can avoid cross contamination chances from having direct contact with LN2.
Trial registration number
Not applicable
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Affiliation(s)
- E A Park
- CHA Fertility Center Seoul Station, Fertility laboratory, Seoul, Korea- South
| | - K Y Kang
- CHA Fertility Center Seoul Station, Fertility laboratory, Seoul, Korea- South
| | - J H Lee
- CHA Fertility Center Seoul Station, Fertility laboratory, Seoul, Korea- South
| | - J Y Lee
- CHA Fertility Center Seoul Station, Fertility laboratory, Seoul, Korea- South
| | - H S Kim
- CHA Fertility Center Seoul Station, Fertility laboratory, Seoul, Korea- South
| | - H S Choi
- CHA Fertility Center Seoul Station, Fertility laboratory, Seoul, Korea- South
| | - G Y Song
- CHA Fertility Center Seoul Station, Fertility laboratory, Seoul, Korea- South
| | - E H Moon
- CHA Fertility Center Seoul Station, Fertility laboratory, Seoul, Korea- South
| | - M Y Shiin
- CHA Fertility Center Seoul Station, Fertility laboratory, Seoul, Korea- South
| | - Y J Hur
- CHA Fertility Center Seoul Station, Department of Obstetrics and Gynecology, Seoul, Korea- South
| | - E J Yu
- CHA Fertility Center Seoul Station, Department of Obstetrics and Gynecology, Seoul, Korea- South
| | - R Kim
- CHA Fertility Center Seoul Station, Department of Obstetrics and Gynecology, Seoul, Korea- South
| | - M K Koong
- CHA Fertility Center Seoul Station, Department of Obstetrics and Gynecology, Seoul, Korea- South
| | - K A Lee
- CHA University, Department of Biomedical Science- College of Life Science, Seoul, Korea- South
| | - M J Kim
- CHA Fertility Center Seoul Station, Department of Obstetrics and Gynecology, Seoul, Korea- South
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Pei CZ, Park HB, Choi HS, Choi B, Park HY, Jung HY, Baek KH. P–370 RPL-protease A as a potential biomarker for predicting recurrent pregnancy loss. Hum Reprod 2021. [DOI: 10.1093/humrep/deab130.369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Study question
Could the reduction of RPL-protease A be involved in the dysfunctional trophoblast for resulting in recurrent pregnancy loss (RPL).
Summary answer
Low expression of RPL-protease A may result in RPL and low serum RPL-protease A level may be a potential biomarker for predicting RPL.
What is known already
The RPL-protease A is expressed and secreted by placenta. The RPL-protease A is involved in the pathogenesis of pre-eclampsia, and the serum RPL-protease A level is higher in the patients with pre-eclampsia than that of normal groups. In our previous study, we identified that the RPL-protease A mRNA level was lower in the villi of patients with RPL than that of normal groups.
Study design, size, duration
Using the CRISPR/Cas9 system, the RPL-protease A gene knockout BeWo cell (BeWo KO) line was established, and the wild type (BeWo WT) and BeWo KO cells were applied to investigate the roles of RPL-protease A in trophoblasts. The human serum RPL-protease A levels were investigated by Western blot analysis and ELISA kit.
Participants/materials, setting, methods
The cell-cell fusion, cell counting analysis, invasion and scratch wound assays, cell cycle analysis, and immunocytochemical analysis were used to investigate cellular functions of RPL-protease A in trophoblast. The sera were obtained from 32 normal pregnant women and 60 women with RPL. The Western blot analysis and ELISA were used for detection of serum RPL-protease A levels.
Main results and the role of chance
The β-hCG was detected in fused BeWo WT cells, while the BeWo KO cells cannot fuse and did not express the β-hCG. The ability of invasion was decreased, but the capacity of migration and proliferation was higher in BeWo KO cells than BeWo WT cells. Cell fusion related factor (β-hCG), and cell invasion related factors (MMP–2 and MMP–9) were highly expressed in BeWo WT cells, and cell related factor (FAK), and cell proliferation related factors (ERK, p38, JNK, MKK3, MKK6, Raf, and Ras) were highly expressed in BeWo KO cells. The Western blot analysis and ELISA indicate that the serum RPL-protease A level was decreased in patients with RPL compared to that of normal groups.
Limitations, reasons for caution
The results of this study have the limitation of RPL-protease A functions in vitro.
Wider implications of the findings: The cellular functions of RPL-protease A in trophoblasts were investigated to explain the pathogenesis of RPL, and low serum RPL-protease A level can be used for a potential biomarker predicting RPL.
Trial registration number
Not applicable
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Affiliation(s)
- C Z Pei
- CHA University, Department of Biomedical Science, Seongnam-Si Gyeonggi-Do, Korea- South
| | - H B Park
- CHA University, Department of Biomedical Science, Seongnam-Si Gyeonggi-Do, Korea- South
| | - H S Choi
- CHA University, Department of Biomedical Science, Seongnam-Si Gyeonggi-Do, Korea- South
| | - B Choi
- Creation and Love Women’s Hospital, Department of Obstetrics and Gynecology, Gwangju, Korea- South
| | - H Y Park
- Creation and Love Women’s Hospital, Department of Obstetrics and Gynecology, Gwangju, Korea- South
| | - H Y Jung
- Creation and Love Women’s Hospital, Department of Obstetrics and Gynecology, Gwangju, Korea- South
| | - K H Baek
- CHA University, Department of Biomedical Science, Seongnam-Si Gyeonggi-Do, Korea- South
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Yang J, Kim H, Shin K, Nam Y, Heo HJ, Kim GH, Hwang BY, Kim J, Woo S, Choi HS, Ko DS, Lee D, Kim YH. Molecular insights into the development of hepatic metastases in colorectal cancer: a metastasis prediction study. Eur Rev Med Pharmacol Sci 2020; 24:12701-12708. [PMID: 33378017 DOI: 10.26355/eurrev_202012_24168] [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] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Colorectal cancer is presently the third most commonly diagnosed cancer in the United States. In this study, we identified molecular differences between hepatic and non-hepatic metastases in colorectal cancer and evaluated their prognostic significance. MATERIALS AND METHODS We downloaded primary data from the NCBI Gene Expression Omnibus (GSE6988, GSE62321, GSE50760, and GSE28722). To identify the molecular differences, we used the Significance Analysis of Microarray method. We selected nine prognostic genes (SYTL2, PTPLAD1, CDS1, RNF138, PIGR, WDR78, MYO7B, TSPAN3, and ATP5F1) with hepatic metastasis prediction score in colorectal cancer (hereafter referred to as LASSO Score). We confirmed the prognostic significance of the LASSO Score by using Kaplan-Meier survival analysis, multivariate analysis, the time-dependent area under the curve (AUC) of Uno's C-index, and the AUC of the receiver operating characteristic curve at 1-5 years. RESULTS Survival analysis revealed that a high LASSO Score is associated with a poor prognosis in colorectal cancer patients with hepatic metastases (p = 0). Analysis of C-indices and AUC values from the receiver operating characteristic curve further supported this prediction by the LASSO Score. Multivariate analysis confirmed the prognostic significance of the LASSO Score (p = 1.13e-06). CONCLUSIONS This study reveals the biological mechanisms underlying hepatic metastases in colorectal cancer and will help in developing targeted therapies for colorectal cancer.
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Affiliation(s)
- J Yang
- Department of Premedicine, School of Medicine, Pusan National University, Yangsan, South Korea.
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Moon HG, Cao Y, Yang J, Lee JH, Choi HS, Jin Y. Correction: Lung epithelial cell-derived extracellular vesicles activate macrophage-mediated inflammatory responses via ROCK1 pathway. Cell Death Dis 2020; 11:116. [PMID: 32051400 PMCID: PMC7015944 DOI: 10.1038/s41419-020-2310-x] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
An amendment to this paper has been published and can be accessed via a link at the top of the paper.
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Affiliation(s)
- H -G Moon
- Division of Pulmonary and Critical Care, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA
| | - Y Cao
- Division of Pulmonary and Critical Care, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA
| | - J Yang
- Division of Pulmonary and Critical Care, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA
| | - J H Lee
- Division of Hematology/Oncology, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, MA, 02215, USA
| | - H S Choi
- Division of Hematology/Oncology, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, MA, 02215, USA
| | - Y Jin
- Division of Pulmonary and Critical Care, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA, 02115, USA.
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Kim JH, Choi HS, Goo D, Park GH, Han GP, Delos Reyes JB, Kil DY. Effect of dietary melamine concentrations on growth performance, excreta characteristics, plasma measurements, and melamine residue in the tissue of male and female broiler chickens. Poult Sci 2019; 98:3204-3211. [PMID: 30850838 DOI: 10.3382/ps/pez050] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Accepted: 01/27/2019] [Indexed: 11/20/2022] Open
Abstract
The objectives of the current experiment were to investigate the effect of dietary melamine concentrations on growth performance, excreta characteristics, plasma measurements, and melamine residue in the tissue of male and female broiler chickens. Finally, the safe levels of melamine in broiler diets were determined based on BW gain (BWG) and melamine residue in the breast meat. A total of 1,008 1-d-old Ross 308 male and female broiler chickens were allotted to 1 of 7 dietary treatments within each sex in a completely randomized design. There were 6 replicates per treatment and each replicate consisted of 12 birds. Dietary melamine concentrations were set to 0; 250; 500; 750; 1,000; 5,000; or 10,000 mg/kg by adding a purified form of melamine. Diets were provided to birds on ad libitum basis for 35 d. Results indicated that no significant interaction between sex and dietary melamine concentrations was observed for all measurements. The BW, BWG, and feed intake for birds fed diets containing 10,000 mg/kg melamine were less (P < 0.05) than for those fed other diets. Melamine residues in the kidney and breast for birds fed diets containing 10,000 mg/kg melamine were greater (P < 0.05) than for birds fed other diets. The toxic level of dietary melamine based on BWG was determined by the one-slope broken-line analysis. The resulting equation was Y = 1,851 - 0.0404 × (X - 4,292), which indicated that a greater than 4,292 mg/kg melamine in diets was toxic to broiler chickens. The safe level of dietary melamine to limit melamine residue in the broiler breast was analyzed using the linear regression, which indicated that the safe level of melamine in broiler diets was 814 mg/kg. In conclusion, less than 814 mg/kg melamine in broiler diets should be maintained to satisfy human food safety regulations for melamine residue in the breast meat of broiler chickens.
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Affiliation(s)
- J H Kim
- Department of Animal Science and Technology, Chung-Ang University, Anseong-si, Gyeonggi-do 17546, Republic of Korea
| | - H S Choi
- Department of Animal Science and Technology, Chung-Ang University, Anseong-si, Gyeonggi-do 17546, Republic of Korea
| | - D Goo
- Department of Animal Science and Technology, Chung-Ang University, Anseong-si, Gyeonggi-do 17546, Republic of Korea
| | - G H Park
- Department of Animal Science and Technology, Chung-Ang University, Anseong-si, Gyeonggi-do 17546, Republic of Korea
| | - G P Han
- Department of Animal Science and Technology, Chung-Ang University, Anseong-si, Gyeonggi-do 17546, Republic of Korea
| | - J B Delos Reyes
- Department of Animal Science and Technology, Chung-Ang University, Anseong-si, Gyeonggi-do 17546, Republic of Korea
| | - D Y Kil
- Department of Animal Science and Technology, Chung-Ang University, Anseong-si, Gyeonggi-do 17546, Republic of Korea
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Choi J, Kim B, Choi Y, Shin NY, Jang J, Choi HS, Jung SL, Ahn KJ. Image Quality of Low-Dose Cerebral Angiography and Effectiveness of Clinical Implementation on Diagnostic and Neurointerventional Procedures for Intracranial Aneurysms. AJNR Am J Neuroradiol 2019; 40:827-833. [PMID: 30948380 DOI: 10.3174/ajnr.a6029] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 02/27/2019] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Awareness of the potential for exposure to high doses of radiation from interventional radiologic procedures has increased. The purpose of this study was to evaluate image quality and dose reduction of low-dose cerebral angiography during diagnostic and therapeutic procedures for intracranial aneurysms. MATERIALS AND METHODS A retrospective review of 1137 prospectively collected patients between January 2012 and June 2014 was performed. Beginning in April 2013, a dose-reduction strategy was implemented. Subjective image-quality assessment of 506 standard and 540 low-dose cerebral angiography images was performed by 2 neuroradiologists using a 5-point scale and was tested using noninferiority statistics. Radiation dose-area product and air kerma of 1046 diagnostic and 317 therapeutic procedures for intracranial aneurysms were analyzed and compared between groups before (group 1) and after (group 2) clinical implementation of a dose-reduction strategy. RESULTS The image quality of the low-dose cerebral angiography was not inferior on the basis of results from the 2 readers. For diagnostic cerebral angiography, the mean dose-area product and air kerma were 140.8 Gy×cm2 and 1.0 Gy, respectively, in group 1 and 82.0 Gy×cm2 and 0.6 Gy in group 2 (P < .001, P < .001). For the neurointerventional procedure, the mean dose-area product and air kerma were 246.0 Gy×cm2 and 3.7 Gy, respectively, in group 1 and 169.8 Gy×cm2 and 3.3 Gy in group 2 (P < .001, P = .291). CONCLUSIONS With low-dose cerebral angiography, image quality was maintained, and implementation of dose-reduction strategies reduced radiation doses in patients undergoing diagnostic and neurointerventional procedures for intracranial aneurysms.
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Affiliation(s)
- J Choi
- From the Department of Radiology (J.C.), St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Gyeonggi-do, Republic of Korea
| | - B Kim
- Department of Radiology (B.K., Y.C., N.Y.S., J.J., H.S.C., S.L.J., K.J.A.), Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
| | - Y Choi
- Department of Radiology (B.K., Y.C., N.Y.S., J.J., H.S.C., S.L.J., K.J.A.), Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - N Y Shin
- Department of Radiology (B.K., Y.C., N.Y.S., J.J., H.S.C., S.L.J., K.J.A.), Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - J Jang
- Department of Radiology (B.K., Y.C., N.Y.S., J.J., H.S.C., S.L.J., K.J.A.), Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - H S Choi
- Department of Radiology (B.K., Y.C., N.Y.S., J.J., H.S.C., S.L.J., K.J.A.), Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - S L Jung
- Department of Radiology (B.K., Y.C., N.Y.S., J.J., H.S.C., S.L.J., K.J.A.), Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - K J Ahn
- Department of Radiology (B.K., Y.C., N.Y.S., J.J., H.S.C., S.L.J., K.J.A.), Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
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Goo D, Kim JH, Choi HS, Park GH, Han GP, Kil DY. Effect of stocking density and sex on growth performance, meat quality, and intestinal barrier function in broiler chickens. Poult Sci 2019; 98:1153-1160. [PMID: 30329115 DOI: 10.3382/ps/pey491] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 09/20/2018] [Indexed: 12/15/2022] Open
Abstract
The objective of the current experiment was to investigate the effect of stocking density and sex on growth performance, meat quality, and intestinal barrier function in broiler chickens. The experiment was conducted in a completely randomized design with a 2 × 4 factorial arrangement consisting of sex and four different stocking densities in battery cages. A total of 540 1-d-old Ross 308 broiler chickens were allotted to one of eight treatments with five replicates. Within each sex, birds were raised at four different stocking densities of 15.2, 20.2, 25.3, or 30.4 birds/m2 from 1 to 28 d of age. Different stocking densities were achieved by raising a different number of birds per battery cage with identical floor size (0.76 m × 0.78 m). At the end of the experiment, two birds per replicate were euthanized by CO2 asphyxiation to collect tissue samples for further analyses. Results indicated that no interactions between sex and stocking density were observed for all measurements except for serum lipopolysaccharide (LPS) concentrations. Increasing stocking density decreased (linear, P < 0.01) body weight gain and feed intake, but had no negative effects on meat quality. Trans-epithelial electrical resistance values, a measure of intestinal permeability, were decreased (linear, P < 0.01) with increasing stocking density, regardless of sex. Accordingly, serum LPS concentrations were increased (linear, P < 0.01) with increasing stocking density. However, increasing stocking density increased serum LPS concentrations in male broiler chickens, but had no effects on female broiler chickens, showing an interaction (P < 0.01). The expression of zonula occludens-1 (ZO-1) and junctional adhesion molecule B (JAM-2) was decreased (linear, P < 0.05) with increasing stocking density. In conclusion, increasing stocking density decreases broiler performance regardless of sex and this negative effect is likely associated with decreased intestinal barrier function.
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Affiliation(s)
- D Goo
- Department of Animal Science and Technology, Chung-Ang University, Anseong-si, Gyeonggi-do 17546, Republic of Korea
| | - J H Kim
- Department of Animal Science and Technology, Chung-Ang University, Anseong-si, Gyeonggi-do 17546, Republic of Korea
| | - H S Choi
- Department of Animal Science and Technology, Chung-Ang University, Anseong-si, Gyeonggi-do 17546, Republic of Korea
| | - G H Park
- Department of Animal Science and Technology, Chung-Ang University, Anseong-si, Gyeonggi-do 17546, Republic of Korea
| | - G P Han
- Department of Animal Science and Technology, Chung-Ang University, Anseong-si, Gyeonggi-do 17546, Republic of Korea
| | - D Y Kil
- Department of Animal Science and Technology, Chung-Ang University, Anseong-si, Gyeonggi-do 17546, Republic of Korea
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Bae EH, Lim SY, Han KD, Jung JH, Choi HS, Kim CS, Ma SK, Kim SW. Systemic lupus erythematosus is a risk factor for cancer: a nationwide population-based study in Korea. Lupus 2019; 28:317-323. [PMID: 30712493 DOI: 10.1177/0961203319826672] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [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: 12/13/2022]
Abstract
OBJECTIVE Specific differences in cancer risk have been observed between systemic lupus erythematosus patients and the general population. Although meta-analyses have estimated cancer incidence in systemic lupus erythematosus patients, results have been inconclusive. Hence, we aimed to assess malignancy risk in systemic lupus erythematosus patients, compared to the risk in the general population. METHODS Systemic lupus erythematosus patients ( n = 21,016; mean age 41.67 ± 13.14 years; female 90.22%) were selected from the Korean National Health Insurance Service database between 2008 and 2014. Age- and sex-matched controls were randomly sampled in a 5:1 ratio ( n = 105,080). RESULTS During the 7 years of follow up, malignancy was detected in 763 (3.63%) systemic lupus erythematosus patients and 2667 (2.54%) controls. Systemic lupus erythematosus patients had a higher risk of malignancy than controls (odds ratio 1.44; 95% confidence interval 1.327-1.559), after multivariate adjustment. Systemic lupus erythematosus patients had a higher odds ratio for developing cervical, thyroid, ovarian, and oral cancer, as well as lymphoma, leukemia, and multiple myeloma than controls. Based on subgroup analysis, male systemic lupus erythematosus patients and patients younger than 40 years showed the highest lymphoma risk. CONCLUSIONS Systemic lupus erythematosus might be an independent risk factor for cancer. Therefore, the importance of cancer screening programs should be emphasized in systemic lupus erythematosus patients. Our study is the first large nationwide cohort study for evaluating the risk of cancer in systemic lupus erythematosus patients.
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Affiliation(s)
- E H Bae
- 1 Department of Internal Medicine, Chonnam National University Medical School, Gwangju
| | - S Y Lim
- 2 Department of Internal Medicine, Korea University Ansan Hospital, Ansan, Korea
| | - K-D Han
- 3 Department of Medical Statistics, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - J-Hy Jung
- 3 Department of Medical Statistics, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - H S Choi
- 1 Department of Internal Medicine, Chonnam National University Medical School, Gwangju
| | - C S Kim
- 1 Department of Internal Medicine, Chonnam National University Medical School, Gwangju
| | - S K Ma
- 1 Department of Internal Medicine, Chonnam National University Medical School, Gwangju
| | - S W Kim
- 1 Department of Internal Medicine, Chonnam National University Medical School, Gwangju
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12
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Lim SY, Bae EH, Han KD, Jung JH, Choi HS, Kim HY, Kim CS, Ma SK, Kim SW. Systemic lupus erythematosus is a risk factor for cardiovascular disease: a nationwide, population-based study in Korea. Lupus 2018; 27:2050-2056. [PMID: 30282562 DOI: 10.1177/0961203318804883] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
OBJECTIVE To investigate the incidence and clinical significance of cardiovascular disease in systemic lupus erythematosus patients. METHODS We included systemic lupus erythematosus patients ( n = 18,575) without previous cardiovascular disease and age- and sex-matched individuals without systemic lupus erythematosus (controls; n = 92,875) from the Korean National Health Insurance Service database (2008-2014). Both cohorts were followed up for incident cardiovascular disease and death until 2015. RESULTS During follow up, myocardial infarction occurred in 203 systemic lupus erythematosus patients and 325 controls (incidence rate: 1.76 and 0.56 per 1000 person-years, respectively), stroke occurred in 289 patients and 403 controls (incidence rate: 2.51 and 0.70 per 1000 person-years, respectively), heart failure occurred in 358 patients and 354 controls (incidence rate 3.11 and 0.61 per 1000 person-years, respectively), and death occurred in 744 patients and 948 controls (incidence rate 6.54 and 1.64 per 1000 person-years, respectively). Patients with systemic lupus erythematosus had higher risks for myocardial infarction (hazard ratio: 2.74, 95% confidence interval: 2.28-3.37), stroke (hazard ratio: 3.31, 95% confidence interval: 2.84-3.86), heart failure (hazard ratio: 4.60, 95% confidence interval: 3.96-5.35), and cardiac death (hazard ratio: 3.98, 95% confidence interval: 3.61-4.39). CONCLUSIONS Here, systemic lupus erythematosus was an independent risk factor for cardiovascular disease, thus cardiac assessment and management are critical in systemic lupus erythematosus patients.
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Affiliation(s)
- S Y Lim
- 1 Department of Internal Medicine, Korea University Ansan Hospital, Ansan, Korea
| | - E H Bae
- 2 Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea
| | - K-D Han
- 3 Department of Medical Statistics, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - J-H Jung
- 3 Department of Medical Statistics, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - H S Choi
- 2 Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea
| | - H Y Kim
- 2 Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea
| | - C S Kim
- 2 Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea
| | - S K Ma
- 2 Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea
| | - S W Kim
- 2 Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea
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13
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Abstract
Low impact development (LID) technologies mimic the natural water cycle through the physico-chemical and biological interactions of plants, filter media and soil, and microorganisms, thereby reducing the release of pollutants. In LID facilities, plants carry out photosynthesis, facilitate microbial growth, and uptake pollutants contained in stormwater runoff. However, de-icers (CaCl2) used to melt snow during winter slow the growth of plants and even increase plant mortality. In addition, de-icers change the soil structure, causing changes in soil content and affecting the growth of plants and microorganisms. Therefore, this study examined the effects of CaCl2 on the resistance of plants, the removal efficiency of non-point source pollutants, and water circulation. The mortality rate of the tree and shrubs caused by CaCl2 was found to be in the order of Rhododendron indicum > Spiraea prunifolia var. simpliciflora > Metasequoia glyptostroboides. For herbaceous plants, mortality rate was in the order of Pratia pedunculata > Aquilegia japonica > Tagetes erecta > Sedum makinoi aurea > Hosta longipes > Dianthus chinensis > Acorus gramineus > Liriope platyphylla. In addition, it was found that the amount of chlorophyll decreases with high concentrations of CaCl2. The findings of this research will be useful for plant selection considering CaCl2 concentrations applied to paved areas during the winter.
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Affiliation(s)
- H S Choi
- Department of Civil and Environmental Engineering, Kongju National University, 275 Budae-dong, Cheonan, Chungnamdo, 31080, South Korea E-mail:
| | - J S Hong
- Department of Civil and Environmental Engineering, Kongju National University, 275 Budae-dong, Cheonan, Chungnamdo, 31080, South Korea E-mail:
| | - F K F Geronimo
- Department of Civil and Environmental Engineering, Kongju National University, 275 Budae-dong, Cheonan, Chungnamdo, 31080, South Korea E-mail:
| | - L H Kim
- Department of Civil and Environmental Engineering, Kongju National University, 275 Budae-dong, Cheonan, Chungnamdo, 31080, South Korea E-mail:
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Choi HS, Park JH, Kim SH, Shin S, Park MJ. Strong familial association of bone mineral density between parents and offspring: KNHANES 2008-2011. Osteoporos Int 2017; 28:955-964. [PMID: 27747365 DOI: 10.1007/s00198-016-3806-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Accepted: 10/06/2016] [Indexed: 01/12/2023]
Abstract
UNLABELLED Bone mineral density (BMD) of offspring was significantly associated with their parents' BMD. Parental BMD Z-score ≤-1 was a significant predictor for BMD Z-score ≤-1 in their offspring. Peak bone mass acquisition during early adulthood is more substantially influenced by genetic factors rather than lifestyle or environmental factors. INTRODUCTION A person's BMD is affected by both genetic and environmental factors. Family history of osteoporosis or fragility fracture is a well-known risk factor for low bone mass or fracture. The purpose of the present study was to investigate the familial association of BMD between parents and offspring in Korean population. METHODS This is a cross-sectional study based on the data from the Korea National Health and Nutrition Examination Surveys (KNHANES) conducted from 2008 to 2011. A total of 5947 subjects (3135 parents and 2812 offspring) were included. RESULTS In age-adjusted partial correlation analyses, all BMD values acquired from the lumbar spine, femur neck, total hip, and whole body showed significant associations between parents and offspring. Among these associations, whole-body BMD showed the strongest relationship between offspring and parents. The narrow-sense heritability of BMD ranged from 0.203 to 0.542 in male offspring and from 0.396 to 0.689 in female offspring. Multiple linear regression analyses showed that offspring's BMD was independently associated with BMD of both parents after adjusting for covariates. Lifestyle or environmental factors including dietary calcium intake, serum 25-hydroxyvitamin D level, regular exercise, current smoking, and alcohol intake showed only moderate or no associations with BMD. In multiple logistic regression analyses in offspring aged 19-25 years, the son's risk of having BMD Z-score ≤-1 was associated with both parents' BMD Z-score ≤-1, while the daughter's risk was only associated with maternal BMD Z-score ≤-1. CONCLUSIONS Our findings confirm the strong familial association of BMD between parents and offspring in Korean population and suggest that peak bone mass acquisition during early adulthood is more substantially influenced by genetic factors rather than lifestyle or environmental factors.
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Affiliation(s)
- H S Choi
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Dongguk University Ilsan Hospital, Koyang, Gyeonggi-do, Korea
| | - J H Park
- Department of Statistics, Dongguk University, Seoul, Korea
| | - S H Kim
- Department of Pediatrics, Sanggye Paik Hospital, Inje University College of Medicine, 761-1 Sanggye-7-dong, Nowon-gu, Seoul, 139-707, Korea
| | - S Shin
- Department of Preventive Medicine, Seoul National University College of Medicine, 102 Daehak-ro, Jongro-gu, Seoul, 03080, Korea
- Institute of Environmental Medicine, Seoul National University Medical Research Center, 102 Daehak-ro, Jongro-gu, Seoul, 03080, Korea
| | - M J Park
- Department of Pediatrics, Sanggye Paik Hospital, Inje University College of Medicine, 761-1 Sanggye-7-dong, Nowon-gu, Seoul, 139-707, Korea.
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Lee SY, Masaoka T, Han HS, Matsuzaki J, Hong MJ, Fukuhara S, Choi HS, Suzuki H. A prospective study on symptom generation according to spicy food intake and TRPV1 genotypes in functional dyspepsia patients. Neurogastroenterol Motil 2016; 28:1401-8. [PMID: 27094759 DOI: 10.1111/nmo.12841] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 03/24/2016] [Indexed: 12/11/2022]
Abstract
BACKGROUND Capsaicin is an ingredient of red peppers that binds to transient receptor potential vanilloid subtype 1 (TRPV1), and Koreans eat more capsaicin-rich food than do Japanese. This study aimed to compare symptom generation according to TRPV1 genotypes and the intake of spicy foods. METHODS Consecutive functional dyspepsia (FD) patients who were evaluated at Konkuk University Medical Centre (Korea) and Keio University Hospital (Japan) were included. Questionnaires on spicy food intake, patient assessment of gastrointestinal symptoms (PAGI-SYM), patient assessment of quality of life, and hospital anxiety and depression scale were provided. Blood was sampled for the detection of TRPV1 polymorphisms, and upper gastrointestinal endoscopy was performed with biopsies. KEY RESULTS Of 121 included subjects, 35 and 28 carried the TRPV1 CC and GG genotypes, respectively, with the prevalence rates not differing between Japan and Korea. The prevalence of FD subtypes did not differ with the spicy food intake, TRPV1 genotypes, or Helicobacter pylori infection. Neither TRPV1 polymorphisms nor H. pylori infections were related to scores on the PAGI-SYM questionnaires, but spicy food intake was positively correlated with the scores for stomach fullness (p = 0.001) and retching (p = 0.001). Using the linear regression analysis, stomach fullness was associated with spicy food intake (p = 0.007), whereas retching was related to younger age (p < 0.001) and female gender (p = 0.014). CONCLUSIONS & INFERENCES Upper gastrointestinal symptoms are more common in subjects with a higher consumption of spicy foods, younger age and female gender, regardless of TRPV1 genotypes and the H. pylori infection status. Capsaicin-rich foods may induce stomach fullness.
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Affiliation(s)
- S-Y Lee
- Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea
| | - T Masaoka
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan
| | - H S Han
- Department of Pathology, Konkuk University School of Medicine, Seoul, Korea
| | - J Matsuzaki
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan
| | - M J Hong
- Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea
| | - S Fukuhara
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan
| | - H S Choi
- Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea
| | - H Suzuki
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan.,Medical Education Center, Keio University School of Medicine, Tokyo, Japan
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16
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Kwon SG, Roh DH, Yoon SY, Choi SR, Choi HS, Moon JY, Kang SY, Kim HW, Han HJ, Beitz AJ, Oh SB, Lee JH. Role of peripheral sigma-1 receptors in ischaemic pain: Potential interactions with ASIC and P2X receptors. Eur J Pain 2016; 20:594-606. [PMID: 26358747 DOI: 10.1002/ejp.774] [Citation(s) in RCA: 13] [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] [Accepted: 07/21/2015] [Indexed: 12/19/2022]
Abstract
BACKGROUND The role of peripheral sigma-1 receptors (Sig-1Rs) in normal nociception and in pathologically induced pain conditions has not been thoroughly investigated. Since there is mounting evidence that Sig-1Rs modulate ischaemia-induced pathological conditions, we investigated the role of Sig-1Rs in ischaemia-induced mechanical allodynia (MA) and addressed their possible interaction with acid-sensing ion channels (ASICs) and P2X receptors at the ischaemic site. METHODS We used a rodent model of hindlimb thrombus-induced ischaemic pain (TIIP) to investigate their role. Western blot was performed to observe changes in Sig-1R expression in peripheral nervous tissues. MA was measured after intraplantar (i.pl.) injections of antagonists for the Sig-1, ASIC and P2X receptors in TIIP rats or agonists of each receptor in naïve rats. RESULTS Sig-1R expression significantly increased in skin, sciatic nerve and dorsal root ganglia at 3 days post-TIIP surgery. I.pl. injections of the Sig-1R antagonist, BD-1047 on post-operative days 0-3 significantly attenuated the development of MA during the induction phase, but had no effect on MA when given during the maintenance phase (days 3-6 post-surgery). BD-1047 synergistically increased amiloride (an ASICs blocker)- and TNP-ATP (a P2X antagonist)-induced analgesic effects in TIIP rats. In naïve rats, i.pl. injection of Sig-1R agonist PRE-084 alone did not produce MA; but it did induce MA when co-administered with either an acidic pH solution or a sub-effective dose of αβmeATP. CONCLUSION Peripheral Sig-1Rs contribute to the induction of ischaemia-induced MA via facilitation of ASICs and P2X receptors. Thus, peripheral Sig-1Rs represent a novel therapeutic target for the treatment of ischaemic pain.
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Affiliation(s)
- S G Kwon
- Department of Veterinary Physiology, BK21 PLUS Program for Creative Veterinary Science Research, Research Institute for Veterinary Science and College of Veterinary Medicine, Seoul National University, Korea
| | - D H Roh
- Department of Maxillofacial Tissue Regeneration, School of Dentistry, Kyung Hee University, Seoul, Korea
| | - S Y Yoon
- Pain Cognitive Function Research Center, Department of Brain and Cognitive Sciences College of Natural Sciences, Seoul National University, Korea
- Dental Research Institute and Department of Neurobiology and Physiology, School of Dentistry, Seoul National University, Korea
| | - S R Choi
- Department of Veterinary Physiology, BK21 PLUS Program for Creative Veterinary Science Research, Research Institute for Veterinary Science and College of Veterinary Medicine, Seoul National University, Korea
| | - H S Choi
- Department of Veterinary Physiology, BK21 PLUS Program for Creative Veterinary Science Research, Research Institute for Veterinary Science and College of Veterinary Medicine, Seoul National University, Korea
| | - J Y Moon
- KM Fundamental Research Division, Korea Institute of Oriental Medicine, Daejeon, Korea
| | - S Y Kang
- KM Fundamental Research Division, Korea Institute of Oriental Medicine, Daejeon, Korea
| | - H W Kim
- Department of Physiology, Institute of Brain Research, Chungnam National University Medical School, Daejeon, Korea
| | - H J Han
- Department of Veterinary Physiology, BK21 PLUS Program for Creative Veterinary Science Research, Research Institute for Veterinary Science and College of Veterinary Medicine, Seoul National University, Korea
| | - A J Beitz
- Department of Veterinary and Biomedical Sciences, College of Veterinary Medicine, University of Minnesota, St Paul, USA
| | - S B Oh
- Pain Cognitive Function Research Center, Department of Brain and Cognitive Sciences College of Natural Sciences, Seoul National University, Korea
- Dental Research Institute and Department of Neurobiology and Physiology, School of Dentistry, Seoul National University, Korea
| | - J H Lee
- Department of Veterinary Physiology, BK21 PLUS Program for Creative Veterinary Science Research, Research Institute for Veterinary Science and College of Veterinary Medicine, Seoul National University, Korea
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Scotti A, Liu W, Hyatt JS, Herman ES, Choi HS, Kim JW, Lyon LA, Gasser U, Fernandez-Nieves A. The CONTIN algorithm and its application to determine the size distribution of microgel suspensions. J Chem Phys 2016; 142:234905. [PMID: 26093577 DOI: 10.1063/1.4921686] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
We review a powerful regularization method, known as CONTIN, for obtaining the size distribution of colloidal suspensions from dynamic light scattering data. We show that together with the so-called L-curve criterion for selecting the optimal regularization parameter, the method correctly describes the average size and size distribution of microgel suspensions independently characterized using small-angle neutron scattering. In contrast, we find that when using the default regularization process, where the regularizer is selected via the "probability to reject" method, the results are not as satisfactory.
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Affiliation(s)
- A Scotti
- Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - W Liu
- School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | - J S Hyatt
- School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | - E S Herman
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | - H S Choi
- Shinsegae International, 422 Apgujeong-ro, Gangnam-gu, Seoul 135-954, South Korea
| | - J W Kim
- Department of Applied Chemistry, Hanyang University, Ansan, Gyeonggi-do 426-791, South Korea
| | - L A Lyon
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
| | - U Gasser
- Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - A Fernandez-Nieves
- School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
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18
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Chang JW, Park AY, Byeon HK, Choi HS. Use of pulsed dye laser treatments in patients with vocal fold mucosal bridges with sulcus vocalis - our experience of five cases. Clin Otolaryngol 2016; 42:715-719. [PMID: 26751135 DOI: 10.1111/coa.12618] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/28/2015] [Indexed: 12/01/2022]
Affiliation(s)
- J W Chang
- Department of Otolaryngology-Head and Neck Surgery, Chungnam National University College of Medicine, Daejeon, Korea
| | - A Y Park
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
| | - H K Byeon
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea.,Gangnam Severance Hospital, Institution of Logopedics & Phoniatrics, Yonsei University College of Medicine, Seoul, Korea
| | - H-S Choi
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea.,Gangnam Severance Hospital, Institution of Logopedics & Phoniatrics, Yonsei University College of Medicine, Seoul, Korea
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19
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Choi HS, Hong JW, Lee JH, Noh JH, Kim DJ. Association of heart rate with albuminuria in a general adult population: the 2011 Korea National Health and Nutrition Examination Survey. Intern Med J 2016; 45:428-35. [PMID: 25533739 DOI: 10.1111/imj.12672] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Accepted: 12/14/2014] [Indexed: 01/13/2023]
Abstract
BACKGROUND Albuminuria is associated with increased risk of multiple adverse health outcomes, such as progressive renal failure, cardiovascular disease and death. However, in the general population, it is uncertain whether albuminuria is associated with elevated heart rate, which is an independent and powerful risk factor for cardiovascular disease. AIM To investigate whether an elevated heart rate is an independent factor associated with albuminuria in the general adult population of Korea. METHODS A cross-sectional analysis was carried out on 5198 Korean adults aged 19 years or older who participated in the fifth (2011) Korea National Health and Nutrition Examination Survey (KNHANES V-2). RESULTS The prevalence of albuminuria showed an increasing trend throughout the whole range of heart rate, even after adjusting for confounders (P = 0.002). The increment was most profound at the heart rate of 70-75 and >76 beats per minute (b.p.m.; P = 0.011). In multiple logistic regression analysis, age (P < 0.001), hypertension (P < 0.001), diabetes (P < 0.001), hypertriglyceridaemia (P = 0.025), estimated glomerular filtration rate (P = 0.028) and heart rate (P = 0.023) were independently associated with the presence of albuminuria in Korean adults. Compared with participants with heart rate ≤ 64 b.p.m., the odds ratio (95% CI) for albuminuria was 1.50 (1.15-1.96) for those with heart rate ≥ 76 b.p.m. CONCLUSIONS The prevalence of albuminuria is independently associated with heart rate in the general adult population of Korea.
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Affiliation(s)
- H S Choi
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Dongguk University Ilsan Hospital, Koyang, Gyeonggi-do, South Korea
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20
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Lee SK, Ahn KJ, Jang JH, Choi HS, Jung SL, Kim BS. Artefacts at a glance: differentiating features of artefactual stenosis from true stenosis at the genu of the petrous internal carotid artery on TOF MRA. Clin Radiol 2015; 71:e72-8. [PMID: 26652609 DOI: 10.1016/j.crad.2015.10.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Revised: 10/05/2015] [Accepted: 10/20/2015] [Indexed: 10/22/2022]
Abstract
AIM To investigate the distinguishing features of artefactual stenosis from true stenosis at the genu of the petrous internal carotid artery (ICA) on time of flight (TOF) magnetic resonance angiography (MRA). MATERIALS AND METHODS Both TOF MRA and digital subtraction angiography (DSA) were performed in 65 patients with 74 vessels who demonstrated artefactual stenosis in 43 patients with 50 vessels and true stenosis in 22 patients with 24 vessels. The following findings of the signal loss were compared between the two groups: (1) margin, (2) darkness, (3) the presence of bilaterality, (4) the presence of tandem arterial stenosis, (5) the location of the epicentre, and (6) length. RESULTS In five out of the six evaluated items, statistically significant differences were present between the two groups (p<0.00 in all five items). Artefactual stenosis more frequently showed signal loss with ill-defined margins (47/50), less darkness compared to the background darkness (46/50), the absence of tandem arterial stenosis (35/50), epicentre at the genu (34/50), and shorter length (2.57 ± 0.68 mm). No significant difference was noted in the presence of bilaterality of signal loss between the two groups (p=0.706). CONCLUSION Several MRA features can be useful for suggesting artefactual stenosis rather than true stenosis at the genu of the petrous ICA on TOF MRA.
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Affiliation(s)
- S K Lee
- Department of Radiology, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, South Korea
| | - K J Ahn
- Department of Radiology, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, South Korea.
| | - J H Jang
- Department of Radiology, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, South Korea
| | - H S Choi
- Department of Radiology, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, South Korea
| | - S L Jung
- Department of Radiology, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, South Korea
| | - B S Kim
- Department of Radiology, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, South Korea
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Moon HG, Cao Y, Yang J, Lee JH, Choi HS, Jin Y. Lung epithelial cell-derived extracellular vesicles activate macrophage-mediated inflammatory responses via ROCK1 pathway. Cell Death Dis 2015; 6:e2016. [PMID: 26658190 PMCID: PMC4720875 DOI: 10.1038/cddis.2015.282] [Citation(s) in RCA: 117] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Revised: 08/17/2015] [Accepted: 09/01/2015] [Indexed: 01/21/2023]
Abstract
Despite decades of research, the pathogenesis of acute respiratory distress syndrome (ARDS) remains poorly understood, thus impeding the development of effective treatment. Diffuse alveolar damage (DAD) and lung epithelial cell death are prominent features of ARDS. Lung epithelial cells are the first line of defense after inhaled stimuli, such as in the case of hyperoxia. We hypothesized that lung epithelial cells release 'messenger' or signaling molecules to adjacent or distant macrophages, thereby initiating or propagating inflammatory responses after noxious insult. We found that, after hyperoxia, a large amount of extracellular vesicles (EVs) were generated and released into bronchoalveolar lavage fluid (BALF). These hyperoxia-induced EVs were mainly derived from live lung epithelial cells as the result of hyperoxia-associated endoplasmic reticulum (ER) stress. These EVs were remarkably different from epithelial 'apoptotic bodies', as reflected by the significantly smaller size and differentially expressed protein markers. These EVs fall mainly in the size range of the exosomes and smaller microvesicles (MVs) (50-120 nm). The commonly featured protein markers of apoptotic bodies were not found in these EVs. Treating alveolar macrophages with hyperoxia-induced, epithelial cell-derived EVs led to an increased secretion of pro-inflammatory cytokines and macrophage inflammatory protein 2 (MIP-2). Robustly increased macrophage and neutrophil influx was found in the lung tissue of the mice intranasally treated with hyperoxia-induced EVs. It was determined that EV-encapsulated caspase-3 was largely responsible for the alveolar macrophage activation via the ROCK1 pathway. Caspase-3-deficient EVs induced less cytokine/MIP-2 release, reduced cell counts in BALF, less neutrophil infiltration and less inflammation in lung parenchyma, both in vitro and in vivo. Furthermore, the serum circulating EVs were increased and mainly derived from lung epithelial cells after hyperoxia exposure. These circulating EVs also activated systemic macrophages other than the alveolar ones. Collectively, the results show that hyperoxia-induced, lung epithelial cell-derived and caspase-3 enriched EVs activate macrophages and mediate the inflammatory lung responses involved in lung injury.
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Affiliation(s)
- H-G Moon
- Division of Pulmonary and Critical Care, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA 02115, USA
| | - Y Cao
- Division of Pulmonary and Critical Care, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA 02115, USA
| | - J Yang
- Division of Pulmonary and Critical Care, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA 02115, USA
| | - J H Lee
- Division of Hematology/Oncology, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA
| | - H S Choi
- Division of Hematology/Oncology, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA
| | - Y Jin
- Division of Pulmonary and Critical Care, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA 02115, USA
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Choi HJ, Kim JY, Lim SC, Kim G, Yun HJ, Choi HS. Dipeptidyl peptidase 4 promotes epithelial cell transformation and breast tumourigenesis via induction of PIN1 gene expression. Br J Pharmacol 2015; 172:5096-109. [PMID: 26267432 PMCID: PMC4687806 DOI: 10.1111/bph.13274] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [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: 12/18/2014] [Revised: 06/19/2015] [Accepted: 07/10/2015] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND AND PURPOSE Dipeptidyl peptidase 4 (DPP4) is an aminopeptidase that is widely expressed in different cell types. Recent studies suggested that DPP4 plays an important role in tumour progression in several human malignancies. Here we have examined the mechanisms by which up-regulation of DPP4 expression causes epithelial transformation and mammary tumourigenesis. EXPERIMENTAL APPROACH Expression of DPP4 and the peptidylprolyl cis/trans isomerase, NIMA-interacting 1 (PIN1), and the cytotoxic effects of combined treatment with sitagliptin and juglone were investigated by immunohistochemistry, immunoblotting, real-time PCR, TUNEL and soft agar assays, using MCF7 cells. The effects of sitagliptin on tumour development in vivo were studied in the syngeneic 4T1 metastatic breast cancer model. KEY RESULTS Activity of the transcription factor E2F1 induced by EGF was enhanced by DPP4, thus increasing PIN1 expression. Furthermore, DPP4 enhanced MEK/ERK and JNK/c-Jun signalling induced by EGF, inducing AP-1 activity and epithelial cell transformation. In contrast, DPP4 silencing or DPP4 inhibition in MCF7 cells inhibited PIN1 expression via E2F1 activity induced by EGF, decreasing colony formation and inducing DNA fragmentation. In the syngeneic 4T1 metastatic breast cancer model, DPP4 overexpression increased tumour development, whereas treatment with sitagliptin and/or juglone suppressed it. Consistent with these observations, DPP4 levels were positively correlated with PIN1 expression in human breast cancer. CONCLUSIONS AND IMPLICATIONS DPP4 promoted EGF-induced epithelial cell transformation and mammary tumourigenesis via induction of PIN1 expression, suggesting that sitagliptin targeting of DPP4 could be a treatment strategy in patients with breast cancer.
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Affiliation(s)
- H J Choi
- College of Pharmacy, Chosun University, Gwangju, South Korea
| | - J Y Kim
- College of Pharmacy, Chosun University, Gwangju, South Korea
| | - S-C Lim
- Department of Pathology, School of Medicine, Chosun University, Gwangju, South Korea
| | - G Kim
- College of Pharmacy, Chosun University, Gwangju, South Korea
| | - H J Yun
- College of Pharmacy, Chosun University, Gwangju, South Korea
| | - H S Choi
- College of Pharmacy, Chosun University, Gwangju, South Korea
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Kim JY, Lim SC, Kim G, Yun HJ, Ahn SG, Choi HS. Interleukin-33/ST2 axis promotes epithelial cell transformation and breast tumorigenesis via upregulation of COT activity. Oncogene 2015. [PMID: 25531326 DOI: 10.1038/onc.2014.418.] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Cytokines of the interleukin-1 (IL-1) family, such as IL-1α/β and IL-18, have pleiotropic activities in innate and adaptive immune responses in host defense and diseases. Insight into their biological functions helped develop novel therapeutic approaches to treat human inflammatory diseases. IL-33 is an important member of the IL-1 family of cytokines and is a ligand of the ST2 receptor, a member of the IL-1 receptor family. However, the role of the IL-33/ST2 axis in tumor growth and metastasis of breast cancer remains unclear. Here, we demonstrate that IL-33 is a critical tumor promoter during epithelial cell proliferation and tumorigenesis in the breast. IL-33 dose- and time-dependently increased Cancer Osaka Thyroid (COT) phosphorylation via ST2-COT interaction in normal epithelial and breast cancer cells. The IL-33/ST2/COT cascade induced the activation of the MEK-ERK (MEK-extracellular signal-regulated kinase), JNK-cJun (cJun N-terminal kinase-cJun) and STAT3 (signal transducer and activator of transcription 3) signaling pathways, followed by increased AP-1 and stat3 transcriptional activity. When small interfering RNAs of ST2 and COT were introduced into cells, IL-33-induced AP-1 and stat3 activity were significantly decreased, unlike that in the control cells. The inhibition of COT activity resulted in decreased IL-33-induced epithelial cell transformation, and knockdown of IL-33, ST2 and COT in breast cancer cells attenuated tumorigenicity of breast cancer cells. Consistent with these observations, ST2 levels were positively correlated with COT expression in human breast cancer. These findings provide a novel perspective on the role of the IL-33/ST2/COT signaling pathway in supporting cancer-associated inflammation in the tumor microenvironment. Therapeutic approaches that target this pathway may, therefore, effectively inhibit carcinogenesis in the breast.
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Affiliation(s)
- J Y Kim
- College of Pharmacy, Chosun University, Gwangju, South Korea
| | - S-C Lim
- Department of Pathology, School of Medicine, Chosun University, Gwangju, South Korea
| | - G Kim
- College of Pharmacy, Chosun University, Gwangju, South Korea
| | - H J Yun
- College of Pharmacy, Chosun University, Gwangju, South Korea
| | - S-G Ahn
- Department of Pathology, School of Dentistry, Chosun University, Gwangju, South Korea
| | - H S Choi
- College of Pharmacy, Chosun University, Gwangju, South Korea
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Kim JY, Lim SC, Kim G, Yun HJ, Ahn SG, Choi HS. Interleukin-33/ST2 axis promotes epithelial cell transformation and breast tumorigenesis via upregulation of COT activity. Oncogene 2015; 34:4928-38. [PMID: 25531326 DOI: 10.1038/onc.2014.418] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [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: 05/07/2014] [Revised: 10/08/2014] [Accepted: 10/31/2014] [Indexed: 02/07/2023]
Abstract
Cytokines of the interleukin-1 (IL-1) family, such as IL-1α/β and IL-18, have pleiotropic activities in innate and adaptive immune responses in host defense and diseases. Insight into their biological functions helped develop novel therapeutic approaches to treat human inflammatory diseases. IL-33 is an important member of the IL-1 family of cytokines and is a ligand of the ST2 receptor, a member of the IL-1 receptor family. However, the role of the IL-33/ST2 axis in tumor growth and metastasis of breast cancer remains unclear. Here, we demonstrate that IL-33 is a critical tumor promoter during epithelial cell proliferation and tumorigenesis in the breast. IL-33 dose- and time-dependently increased Cancer Osaka Thyroid (COT) phosphorylation via ST2-COT interaction in normal epithelial and breast cancer cells. The IL-33/ST2/COT cascade induced the activation of the MEK-ERK (MEK-extracellular signal-regulated kinase), JNK-cJun (cJun N-terminal kinase-cJun) and STAT3 (signal transducer and activator of transcription 3) signaling pathways, followed by increased AP-1 and stat3 transcriptional activity. When small interfering RNAs of ST2 and COT were introduced into cells, IL-33-induced AP-1 and stat3 activity were significantly decreased, unlike that in the control cells. The inhibition of COT activity resulted in decreased IL-33-induced epithelial cell transformation, and knockdown of IL-33, ST2 and COT in breast cancer cells attenuated tumorigenicity of breast cancer cells. Consistent with these observations, ST2 levels were positively correlated with COT expression in human breast cancer. These findings provide a novel perspective on the role of the IL-33/ST2/COT signaling pathway in supporting cancer-associated inflammation in the tumor microenvironment. Therapeutic approaches that target this pathway may, therefore, effectively inhibit carcinogenesis in the breast.
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Affiliation(s)
- J Y Kim
- College of Pharmacy, Chosun University, Gwangju, South Korea
| | - S-C Lim
- Department of Pathology, School of Medicine, Chosun University, Gwangju, South Korea
| | - G Kim
- College of Pharmacy, Chosun University, Gwangju, South Korea
| | - H J Yun
- College of Pharmacy, Chosun University, Gwangju, South Korea
| | - S-G Ahn
- Department of Pathology, School of Dentistry, Chosun University, Gwangju, South Korea
| | - H S Choi
- College of Pharmacy, Chosun University, Gwangju, South Korea
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25
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Choi HJ, Kim JY, Lim SC, Kim G, Yun HJ, Choi HS. Dipeptidyl peptidase 4 promotes epithelial cell transformation and breast tumourigenesis via induction of PIN1 gene expression. Br J Pharmacol 2015. [PMID: 26267432 DOI: 10.1111/bph.13274.] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND AND PURPOSE Dipeptidyl peptidase 4 (DPP4) is an aminopeptidase that is widely expressed in different cell types. Recent studies suggested that DPP4 plays an important role in tumour progression in several human malignancies. Here we have examined the mechanisms by which up-regulation of DPP4 expression causes epithelial transformation and mammary tumourigenesis. EXPERIMENTAL APPROACH Expression of DPP4 and the peptidylprolyl cis/trans isomerase, NIMA-interacting 1 (PIN1), and the cytotoxic effects of combined treatment with sitagliptin and juglone were investigated by immunohistochemistry, immunoblotting, real-time PCR, TUNEL and soft agar assays, using MCF7 cells. The effects of sitagliptin on tumour development in vivo were studied in the syngeneic 4T1 metastatic breast cancer model. KEY RESULTS Activity of the transcription factor E2F1 induced by EGF was enhanced by DPP4, thus increasing PIN1 expression. Furthermore, DPP4 enhanced MEK/ERK and JNK/c-Jun signalling induced by EGF, inducing AP-1 activity and epithelial cell transformation. In contrast, DPP4 silencing or DPP4 inhibition in MCF7 cells inhibited PIN1 expression via E2F1 activity induced by EGF, decreasing colony formation and inducing DNA fragmentation. In the syngeneic 4T1 metastatic breast cancer model, DPP4 overexpression increased tumour development, whereas treatment with sitagliptin and/or juglone suppressed it. Consistent with these observations, DPP4 levels were positively correlated with PIN1 expression in human breast cancer. CONCLUSIONS AND IMPLICATIONS DPP4 promoted EGF-induced epithelial cell transformation and mammary tumourigenesis via induction of PIN1 expression, suggesting that sitagliptin targeting of DPP4 could be a treatment strategy in patients with breast cancer.
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Affiliation(s)
- H J Choi
- College of Pharmacy, Chosun University, Gwangju, South Korea
| | - J Y Kim
- College of Pharmacy, Chosun University, Gwangju, South Korea
| | - S-C Lim
- Department of Pathology, School of Medicine, Chosun University, Gwangju, South Korea
| | - G Kim
- College of Pharmacy, Chosun University, Gwangju, South Korea
| | - H J Yun
- College of Pharmacy, Chosun University, Gwangju, South Korea
| | - H S Choi
- College of Pharmacy, Chosun University, Gwangju, South Korea
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Son MJ, Kwon Y, Son MY, Seol B, Choi HS, Ryu SW, Choi C, Cho YS. Mitofusins deficiency elicits mitochondrial metabolic reprogramming to pluripotency. Cell Death Differ 2015; 22:1957-69. [PMID: 25882047 DOI: 10.1038/cdd.2015.43] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Revised: 03/09/2015] [Accepted: 03/12/2015] [Indexed: 12/29/2022] Open
Abstract
Cell reprogramming technology has allowed the in vitro control of cell fate transition, thus allowing for the generation of highly desired cell types to recapitulate in vivo developmental processes and architectures. However, the precise molecular mechanisms underlying the reprogramming process remain to be defined. Here, we show that depleting p53 and p21, which are barriers to reprogramming, yields a high reprogramming efficiency. Deletion of these factors results in a distinct mitochondrial background with low expression of oxidative phosphorylation subunits and mitochondrial fusion proteins, including mitofusin 1 and 2 (Mfn1/2). Importantly, Mfn1/2 depletion reciprocally inhibits the p53-p21 pathway and promotes both the conversion of somatic cells to a pluripotent state and the maintenance of pluripotency. Mfn1/2 depletion facilitates the glycolytic metabolic transition through the activation of the Ras-Raf and hypoxia-inducible factor 1α (HIF1α) signaling at an early stage of reprogramming. HIF1α is required for increased glycolysis and reprogramming by Mfn1/2 depletion. Taken together, these results demonstrate that Mfn1/2 constitutes a new barrier to reprogramming, and that Mfn1/2 ablation facilitates the induction of pluripotency through the restructuring of mitochondrial dynamics and bioenergetics.
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Affiliation(s)
- M J Son
- Stem Cell Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 305-806, Republic of Korea.,Department of Functional genomics, Korea University of Science & Technology (UST), 217 Gajungro, Yuseong-gu, Daejeon 305-333, Republic of Korea
| | - Y Kwon
- Stem Cell Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 305-806, Republic of Korea.,Department of Functional genomics, Korea University of Science & Technology (UST), 217 Gajungro, Yuseong-gu, Daejeon 305-333, Republic of Korea
| | - M-Y Son
- Stem Cell Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 305-806, Republic of Korea
| | - B Seol
- Stem Cell Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 305-806, Republic of Korea
| | - H-S Choi
- Stem Cell Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 305-806, Republic of Korea
| | - S-W Ryu
- Department of Bio and Brain Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea
| | - C Choi
- Department of Bio and Brain Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea
| | - Y S Cho
- Stem Cell Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Yuseong-gu, Daejeon 305-806, Republic of Korea.,Department of Functional genomics, Korea University of Science & Technology (UST), 217 Gajungro, Yuseong-gu, Daejeon 305-333, Republic of Korea
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Seo JK, Kang M, Shin OJ, Kwak HR, Kim MK, Choi HS, Ko SJ. First Report of Bean common mosaic virus in Cudrania tricuspidata in Korea. Plant Dis 2015; 99:292. [PMID: 30699581 DOI: 10.1094/pdis-07-14-0678-pdn] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Cudrania tricuspidata (Moraceae) is a deciduous tree widely distributed in East Asia, including China, Korea, and Japan. It produces delicious fruit, and its cortex and root bark have been used as a traditional medicine to treat neuritis and inflammation. As C. tricuspidata has become known as a functional food, its cultivation area and production gradually have increased in Korea. However, information of viral disease in C. tricuspidata is very limited. In September 2012, open-field-grown C. tricuspidata trees showing virus-like symptoms of mosaic, yellowing, and distortion on the leaves were found in Naju, Korea. The fruit production in the diseased trees decreased to 20 to 40% of that in healthy trees. To identify causal agent(s), total RNA was isolated from the symptomatic leaves and used to generate a transcriptome library using the TruSeq Stranded Total RNA with Ribo-Zero Plant kit (Illumina, San Diego, CA) according to the manufacturer's instruction. The transcriptome library was analyzed by next-generation sequencing (NGS) using an Illumina HiSeq2000 sequencer. NGS reads were quality filtered and de novo assembled by the Trinity pipeline, and the assembled contigs were analyzed against the viral reference genome database in Genbank by BLASTn and BLASTx searches (3). The entire NGS procedure was perofrmed by Macrogen Inc. (Seoul, South Korea). Among the analyzed contigs, one large contig (10,043 bp) was of viral origin. Nucleotide blast searches showed that the contig has a maximum identity of 89% (with 100% coverage) to the isolate MS1 (Genbank Accession No. EU761198) of Bean common mosaic virus (BCMV), which was isolated from Macroptilium atropurpureum in Australia. The presence of BCMV was confirmed by a commercially available double-antibody sandwich (DAS)-ELISA kit (Agdia, Elkhart, IN). To confirm the BCMV sequence obtained by NGS, two large fragments covering the entire BCMV genome were amplified by reverse transcription-polymerase chain reaction (RT-PCR) using two sets of specific primers (5'-AAAATAAAACAACTCATAAAGACAAC-3' and 5'-AGACTGTGTCCCAGAGCATTTC-3' to amplify the 5' half of the BCMV genome; 5'-GCATCCTGAGATTCACAGAATTC-3' and 5'-GGAACAACAAACATTGCCGTAG-3' to amplify the 3' half of the BCMV genome) and sequenced. To obtain the complete genome sequence, the 5' and 3' terminal sequences were analyzed by the 5' and 3' rapid amplification of cDNA ends (RACE) method as described previously (1). The assembled full-length sequence of BCMV isolated from C. tricuspidata was 10,051 nucleotides in length without a poly(A) tail. It was deposited in Genbank under the accession number KM076650. BCMV, a member of the genus Potyvirus, is one of the most common viruses naturally infecting legumes, including Phaseolus vulgaris (2). In general, BCMV is known to have a restricted host range outside legume species (2). Therefore, the identification of BCMV from C. tricuspidata in this report is very exceptional. Because BCMV is easily transmitted by various aphids like other potyviruses, a large-scale survey may be required for exact investigation of the BCMV incidence in C. tricuspidata to prevent rapid spread of the virus. To the best of our knowledge, this is the first report of BCMV in C. tricuspidata. References: (1) H.-R. Kwak et al. Plant Pathol. J. 29:274, 2013. (2) M. Saiz et al. Virus Res. 31:39, 1994. (3) S.-E. Schelhorn et al. PLoS Comput. Biol. 9:e1003228, 2013.
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Affiliation(s)
- J-K Seo
- Crop Protection Division, National Academy of Agricultural Science, Rural Development Administration, Suwon 441-707, Republic of Korea
| | - M Kang
- Crop Protection Division, National Academy of Agricultural Science, Rural Development Administration, Suwon 441-707, Republic of Korea
| | - O J Shin
- Crop Protection Division, National Academy of Agricultural Science, Rural Development Administration, Suwon 441-707, Republic of Korea
| | - H-R Kwak
- Crop Protection Division, National Academy of Agricultural Science, Rural Development Administration, Suwon 441-707, Republic of Korea
| | - M-K Kim
- Crop Protection Division, National Academy of Agricultural Science, Rural Development Administration, Suwon 441-707, Republic of Korea
| | - H-S Choi
- Crop Protection Division, National Academy of Agricultural Science, Rural Development Administration, Suwon 441-707, Republic of Korea
| | - S-J Ko
- Jeollanam-do Agricultural Research and Extension Services, Naju 520-715, Republic of Korea
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Hwang S, Choi HS, Kim KM, Rhee Y, Lim SK. Associations between serum 25-hydroxyvitamin D and bone mineral density and proximal femur geometry in Koreans: the Korean National Health and Nutrition Examination Survey (KNHANES) 2008-2009. Osteoporos Int 2015; 26:163-71. [PMID: 25262060 DOI: 10.1007/s00198-014-2877-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [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: 03/11/2014] [Accepted: 08/26/2014] [Indexed: 12/31/2022]
Abstract
UNLABELLED The association between 25-hydroxyvitamin D (25(OH)D) levels and bone mineral density (BMD) and proximal femur bone geometry was examined in the Korean population. A positive relationship between skeletal health and 25(OH)D levels was observed. However, there were no significant differences in skeletal health between the groups with 25(OH)D level of 50-75 nmol/L and greater than 75 nmol/L. INTRODUCTION Vitamin D plays an important role in calcium and phosphate homeostasis and normal mineralization of bone. However, the optimal level of vitamin D for skeletal health has not been clearly established. We analyzed the associations between serum 25(OH)D and BMD and proximal femur bone geometry and determined the optimal 25(OH)D level. METHODS This was a cross-sectional study of 10,062 participants (20-95 years, 4,455 men, 5,607 women) in the Fourth Korea National Health and Nutrition Examination Surveys (KNHANES IV) conducted from 2008 to 2009. Participants were divided into groups according to 25(OH)D level (<25, 25-50, 50-75, and ≥75 nmol/L). BMD and proximal femur geometric indices were measured. RESULTS The group with 25(OH)D levels of 50-75 nmol/L had greater bone density values, with the exception of the lumbar spine, and also had greater femur neck cortical thickness, cross-sectional area, and cross-sectional moment of inertia, as well as a lesser buckling ratio than the groups with 25(OH)D level of 25-50 nmol/L and less than 25 nmol/L. However, there were no significant differences in BMD and proximal femur geometry properties between the groups with 50-75 nmol/L and greater than 75 nmol/L of 25(OH)D. CONCLUSION The skeletal outcomes, including BMD and proximal femur geometric indices observed in this study, suggest that serum 25(OH)D levels of 50 to <75 nmol/L are optimal for skeletal health.
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Affiliation(s)
- S Hwang
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul, 120-752, South Korea
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Seo JK, Shin OJ, Kwak HR, Kim MK, Choi HS, Lee SH, Kim JS. First Report of Broad bean wilt virus 2 in Leonurus sibiricus in Korea. Plant Dis 2014; 98:1748. [PMID: 30703914 DOI: 10.1094/pdis-07-14-0695-pdn] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Leonurus sibiricus L. (family Lamiaceae) has been used as a traditional herbal remedy to treat various gynecologic diseases. Although it is a widely distributed subtropical weed in Southeast Asia, L. sibiricus have been commercially cultivated on a small scale in many geographic areas of Korea. In August 2012, field-grown L. sibiricus plants showing mosaic, yellowing, and stunting symptoms were collected near a pepper field in Andong, Korea. Since L. sibiricus is only consumed as a raw material of traditional medicine in Korea, symptomatic plants lose commercial value entirely. To identify the causal agent(s) of the virus-like symptoms, total RNA was extracted from the symptomatic leaves, and a transcriptome library was generated using the TruSeq Stranded Total RNA with Ribo-Zero plant kit (Illumina, San Diego, CA) according to the standard protocol. Next-generation sequencing (NGS) was performed using an Illumina HiSeq2000 sequencer. De novo assembly of the quality filtered NGS reads (101-bp paired-end reads) were performed using the Trinity pipeline and the assembled contigs (92,329 contigs) were analyzed against the viral reference genome database in GenBank by BLASTn and BLASTx searches (3). The entire NGS procedure was performed by Macrogen Inc. (Seoul, South Korea). Among the analyzed contigs, only two large contigs were clearly of viral origin. Nucleotide blast searches showed that the first and second contigs (5,914 and 3,534 bp, respectively) have maximum identities of 91 and 95% to RNA1 of the isolate RP3 (GenBank Accession No. JX183225) and RNA2 of the isolate RP7 (JX183234) of Broad bean wilt virus 2 (BBWV-2), which were isolated from pepper in Korea. The NGS results were confirmed by analyzing the sequences of the fragments covering the entire BBWV-2 genome amplified by RT-PCR using specific primers for BBWV-2 as described previously (1). To obtain the complete genome sequence, terminal sequences of both RNA segments were analyzed by the 5' and 3' rapid amplification of cDNA ends (RACE) method as described previously (1). The assembled full-length sequences of BBWV-2 RNA1 and RNA2 isolated from L. sibiricus were 5,951 and 3,575 nucleotides in length, respectively, and deposited in GenBank under the accessions KM076648 and KM076649, respectively. BBWV-2 belongs to the genus Fabavirus in the family Secoviridae and it is known to have a wide host range. To investigate the host range of the BBWV-2 isolated from L. sibiricus, sap from the symptomatic leaves of L. sibiricus was inoculated to the test plants including Nicotiana benthamiana, Capsicum annuum (red pepper), and C. annuum var. gulosum (Paprika). RT-PCR detection and sequencing of the amplicons showed that all the inoculated test plants were infected with the BBWV-2 isolated from L. sibiricus. Currently, BBWV-2 is epidemic in pepper fields in Korea (1,2). Because BBWV-2 is easily transmitted by various aphids, and L. sibiricus is widely distributed in both wild and cultivated fields in Korea, this host might serve as a potential source of BBWV-2 to other crops such as pepper. To the best of our knowledge, this is the first report of BBWV-2 in L. sibiricus. References: (1) H.-R. Kwak et al. Plant Pathol. J. 29:274, 2013. (2) H.-R. Kwak et al. Plant Pathol. J. 29:397, 2013. (3) S.-E. Schelhorn et al. PLoS Comput. Biol. 9:e1003228, 2013.
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Affiliation(s)
- J-K Seo
- Crop Protection Division, National Academy of Agricultural Science, Rural Development Administration, Suwon 441-707, Republic of Korea
| | - O J Shin
- Crop Protection Division, National Academy of Agricultural Science, Rural Development Administration, Suwon 441-707, Republic of Korea
| | - H-R Kwak
- Crop Protection Division, National Academy of Agricultural Science, Rural Development Administration, Suwon 441-707, Republic of Korea
| | - M-K Kim
- Crop Protection Division, National Academy of Agricultural Science, Rural Development Administration, Suwon 441-707, Republic of Korea
| | - H-S Choi
- Crop Protection Division, National Academy of Agricultural Science, Rural Development Administration, Suwon 441-707, Republic of Korea
| | - S-H Lee
- School of Applied Biosciences, Kyungpook National University, Daegu 702-701, Republic of Korea
| | - J-S Kim
- Department of Plant Medicine, Andong National University, Andong 760-749, Republic of Korea
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Moon JY, Roh DH, Yoon SY, Choi SR, Kwon SG, Choi HS, Kang SY, Han HJ, Beitz AJ, Oh SB, Lee JH. σ1 receptors activate astrocytes via p38 MAPK phosphorylation leading to the development of mechanical allodynia in a mouse model of neuropathic pain. Br J Pharmacol 2014; 171:5881-97. [PMID: 25158784 PMCID: PMC4290724 DOI: 10.1111/bph.12893] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Revised: 08/12/2014] [Accepted: 08/21/2014] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND AND PURPOSE Spinal astrocytes have emerged as important mechanistic contributors to the genesis of mechanical allodynia (MA) in neuropathic pain. We recently demonstrated that the spinal sigma non-opioid intracellular receptor 1 (σ1 receptor) modulates p38 MAPK phosphorylation (p-p38), which plays a critical role in the induction of MA in neuropathic rats. However, the histological and physiological relationships among σ1, p-p38 and astrocyte activation is unclear. EXPERIMENTAL APPROACH We investigated: (i) the precise location of σ1 receptors and p-p38 in spinal dorsal horn; (ii) whether the inhibition of σ1 receptors or p38 modulates chronic constriction injury (CCI)-induced astrocyte activation; and (iii) whether this modulation of astrocyte activity is associated with MA development in CCI mice. KEY RESULTS The expression of σ1 receptors was significantly increased in astrocytes on day 3 following CCI surgery. Sustained intrathecal treatment with the σ1 antagonist, BD-1047, attenuated CCI-induced increase in GFAP-immunoreactive astrocytes, and the treatment combined with fluorocitrate, an astrocyte metabolic inhibitor, synergistically reduced the development of MA, but not thermal hyperalgesia. The number of p-p38-ir astrocytes and neurons, but not microglia was significantly increased. Interestingly, intrathecal BD-1047 attenuated the expression of p-p38 selectively in astrocytes but not in neurons. Moreover, intrathecal treatment with a p38 inhibitor attenuated the GFAP expression, and this treatment combined with fluorocitrate synergistically blocked the induction of MA. CONCLUSIONS AND IMPLICATIONS Spinal σ1 receptors are localized in astrocytes and blockade of σ1 receptors inhibits the pathological activation of astrocytes via modulation of p-p38, which ultimately prevents the development of MA in neuropathic mice.
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Affiliation(s)
- J Y Moon
- Department of Veterinary Physiology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National UniversitySeoul, Korea
| | - D H Roh
- Department of Maxillofacial Tissue Regeneration, Kyung Hee University School of DentistrySeoul, Korea
| | - S Y Yoon
- Laboratory of Molecular Signal Transduction, Center for Neural Science, Korea Institute of Science and Technology (KIST)Seoul, Korea
| | - S R Choi
- Department of Veterinary Physiology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National UniversitySeoul, Korea
| | - S G Kwon
- Department of Veterinary Physiology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National UniversitySeoul, Korea
| | - H S Choi
- Department of Veterinary Physiology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National UniversitySeoul, Korea
| | - S Y Kang
- Acupuncture, Moxibustion and Meridian Research Group, Medical Research Division, Korea Institute of Oriental MedicineDaejeon, Korea
| | - H J Han
- Department of Veterinary Physiology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National UniversitySeoul, Korea
| | - A J Beitz
- Department of Veterinary and Biomedical Sciences, College of Veterinary Medicine, University of MinnesotaSt Paul, MN, USA
| | - S B Oh
- Pain Cognitive Function Research Center, Department of Brain and Cognitive Sciences College of Natural Sciences, Dental Research Institute and Department of Neurobiology and Physiology, School of Dentistry, Seoul National UniversitySeoul, Korea
| | - J H Lee
- Department of Veterinary Physiology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National UniversitySeoul, Korea
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Ahn SS, Kim SH, Lee JE, Ahn KJ, Kim DJ, Choi HS, Kim J, Shin NY, Lee SK. Effects of agmatine on blood-brain barrier stabilization assessed by permeability MRI in a rat model of transient cerebral ischemia. AJNR Am J Neuroradiol 2014; 36:283-8. [PMID: 25273536 DOI: 10.3174/ajnr.a4113] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE BBB disruption after acute ischemic stroke and subsequent permeability increase may be enhanced by reperfusion. Agmatine has been reported to attenuate BBB disruption. Our aim was to evaluate the effects of agmatine on BBB stabilization in a rat model of transient cerebral ischemia by using permeability dynamic contrast-enhanced MR imaging at early stages and subsequently to demonstrate the feasibility of dynamic contrast-enhanced MR imaging for the investigation of new therapies. MATERIALS AND METHODS Thirty-four male Sprague-Dawley rats were subjected to transient MCA occlusion for 90 minutes. Immediately after reperfusion, agmatine (100 mg/kg) or normal saline was injected intraperitoneally into the agmatine-treated group (n = 17) or the control group, respectively. MR imaging was performed after reperfusion. For quantitative analysis, regions of interest were defined within the infarct area, and values for volume transfer constant, rate transfer coefficient, volume fraction of extravascular extracellular space, and volume fraction of blood plasma were obtained. Infarct volume, infarct growth, quantitative imaging parameters, and numbers of factor VIII-positive cells after immunohistochemical staining were compared between control and agmatine-treated groups. RESULTS Among the permeability parameters, volume transfer constant and volume fraction of extravascular extracellular space were significantly lower in the agmatine-treated group compared with the control group (0.05 ± 0.02 minutes(-1) versus 0.08 ± 0.03 minute(-1), P = .012, for volume transfer constant and 0.12 ± 0.06 versus 0.22 ± 0.15, P = .02 for volume fraction of extravascular extracellular space). Other permeability parameters were not significantly different between the groups. The number of factor VIII-positive cells was less in the agmatine-treated group than in the control group (3-fold versus 4-fold, P = .037). CONCLUSIONS In ischemic stroke, agmatine protects the BBB, which can be monitored in vivo by quantification of permeability by using dynamic contrast-enhanced MR imaging. Therefore, dynamic contrast-enhanced MR imaging may serve as a potential imaging biomarker for assessing the BBB stabilization properties of pharmacologic agents.
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Affiliation(s)
- S S Ahn
- From the Department of Radiology and the Research Institute of Radiological Science (S.S.A., D.J.K., J.K., N.-Y.S., S.-K.L.)
| | - S H Kim
- Department of Pathology (S.H.K.), Brain Research Institute
| | - J E Lee
- Department of Anatomy (J.E.L.), Yonsei University College of Medicine, Seoul, Republic of Korea
| | - K J Ahn
- Department of Radiology (K.J.A., H.S.C.), The Catholic University College of Medicine, Seoul, Seoul, Republic of Korea
| | - D J Kim
- From the Department of Radiology and the Research Institute of Radiological Science (S.S.A., D.J.K., J.K., N.-Y.S., S.-K.L.)
| | - H S Choi
- Department of Radiology (K.J.A., H.S.C.), The Catholic University College of Medicine, Seoul, Seoul, Republic of Korea
| | - J Kim
- From the Department of Radiology and the Research Institute of Radiological Science (S.S.A., D.J.K., J.K., N.-Y.S., S.-K.L.)
| | - N-Y Shin
- From the Department of Radiology and the Research Institute of Radiological Science (S.S.A., D.J.K., J.K., N.-Y.S., S.-K.L.)
| | - S-K Lee
- From the Department of Radiology and the Research Institute of Radiological Science (S.S.A., D.J.K., J.K., N.-Y.S., S.-K.L.)
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Abstract
Glycine max (Soybean) is the most important edible crop in Korea. In Korea, eight viruses have been reported to infect soybean, including Alfalfa mosaic virus (AMV), Cowpea mosaic virus (CPMV), Cucumber mosaic virus (CMV), Soybean dwarf virus (SbDV), Soybean mosaic virus (SMV), Soybean yellow common mosaic virus (SYCMV), Soybean yellow mottle virus (SYMMV), and Peanut stunt virus (PSV) (1). In 2012, Glycine max were observed in Daegu, South Korea, with mosaic and mottling symptoms on leaves. Samples with virus-like symptoms (n = 151) were collected from Daegu including legume genetic resource field. Virus particles were filamentous rod shaped, average length 760 nm, and were analyzed by RT-PCR using specific primers for several Potyviruses and previously reported viruses infecting soybean. Only two samples showing mosaic and mottling symptoms were identified as Clover yellow vein virus (ClYVV) based on RT-PCR using primers specific for ClYVV (5'-GTTGGCTTGGTTGACACTGA-3' and 5'-CTTCGATCATGGATGCACA-3'). The sequences of amplified fragments were 97 to 98% similar with ClYVV. ClYVV is a distinct species in the genus Potyvirus and family Potyviridae. ClYVV is transmitted by several species of aphids and by mechanical inoculation (2). ClYVV was first reported on Gentiana scabra, and the disease has never been reported in soybean fields in Korea. The biological properties and full genome sequence of the selected ClYVV isolate of apparent virus symptoms between two samples were analyzed. The ClYVV isolate was inoculated to local lesion plants, re-isolated from local lesions three times, and propagated in Nicotiana benthamiana, and then named ClYVV-Gm. The ClYVV-Gm induced local lesions on inoculated leaves of N. tabacum cv. Xanthi-nc, Tetragonia expansa, and systemic symptoms on upper leaves of Chenopodium amaranticolor, C. quinoa, and N. clevelandii. The ClYVV-Gm caused mosaic and mottling symptoms on Glycine max cv. Kwangan and Phaseolus vulgaris. The genome of ClYVV-Gm was determined to be 9,584 nucleotides in length (GenBank Accession No. KF975894), and it shared 83% to 97% nucleotide identity with the sequences of 27 previously reported ClYVV isolates including Vicia fava and Pisum sativum. Despite low occurrence of ClYVV in Glycine max, ClYVV has a broad host range including tobacco, weed species, and soybean, which can lead to spreading of the virus. Our results indicate that emergence of ClYVV could become a problem to Leguminosae in Korea. To our knowledge, this is the first biological and molecular report of ClYVV infecting Glycine max in Korea. References: (1) Y. H. Lee et al. Korea Soybean Digest 29:7, 2012. (2) T. Sasaya et al. Phytopathology 87:1014, 1997.
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Affiliation(s)
- J-C Shin
- Crop Protection Division, National Academy of Agricultural Science (NAAS), Suwon 441-707, Korea, and Department of Plant Medicine, Chungbuk National University (CBNU), Cheongju 361-763, Korea
| | - M-K Kim
- Crop Protection Division, NAAS, Suwon 441-707, Korea
| | - H-R Kwak
- Crop Protection Division, NAAS, Suwon 441-707, Korea
| | - H-S Choi
- Crop Protection Division, NAAS, Suwon 441-707, Korea
| | - J-S Kim
- Department of Plant Medicine, Andong National University, Andong 760-749, Korea
| | - C-Y Park
- Division of Applied Biology and Chemistry, Kyungpook National University, Daegu 702-701, Korea
| | - B J Cha
- Department of Plant Medicine, CBNU, Cheongju 361-763, Korea
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Kil EJ, Byun HS, Kim S, Hwang H, Kim MK, Kim CS, Choi HS, Lee KY, Lee S. First Report of Tomato yellow leaf curl virus Infecting Eustoma (Eustoma grandiflorum) in Korea. Plant Dis 2014; 98:1163. [PMID: 30708805 DOI: 10.1094/pdis-02-14-0162-pdn] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Eustoma (Eustoma grandiflorum), also called lisianthus, belongs to the family Gentianaceae and is cultivated for flower production globally (1), including in Korea. At least 10 viruses can infect eustoma, including Cucumber mosaic virus (genus Cucumovirus), Tobacco mosaic virus (genus Tobamovirus), Tomato spotted wilt virus (genus Tospovirus), and Tomato yellow leaf curl virus (TYLCV, genus Begomovirus) (1,2). In December 2012, disease symptoms such as leaf curling and stunting were observed on eustoma plants grown in Gumi, Korea, where TYLCV outbreak was reported on tomato farms. In a eustoma greenhouse, about 5% of eustoma plants showed the leaf curling and stunting symptoms. Total DNA was isolated from 15 symptomatic eustoma plants with a Viral Gene-spin Viral DNA/RNA Extraction Kit (iNtRON Biotechnology, Seongnam, Korea) and viral DNA was amplified by rolling circle amplification (TempliPhi Amplification Kit, GE Healthcare Life Sciences, Uppsala, Sweden) following the manufacturer's instructions. All amplicons were digested with the restriction enzyme SacI (TaKaRa Bio, Shiga, Japan) and 2.8-kb DNA fragments were verified on an agarose gel. Fifteen digested DNA fragments were purified from the gel, ligated into pGEM-T easy vector (Promega, Madison, WI), and sequenced (Macrogen, Seoul, Korea, GenBank Accession No. KF225312.1). A BLAST search exhibited a 99% identity to TYLCV previously reported in Korea (GenBank HM856911.1). This is the first report of TYLCV in eustoma plants in Korea. To identify the movement and replication of TYLCV in infected eustoma plants, PCR and Southern hybridization analysis were performed with samples from four organs (flower, leaf, stem, and root) of three individual TYLCV-infected plants. TYLCV TYL DNA from each organ sample was amplified using 2× Taq PCR MasterMix (Bioneer, Daejeon, Korea) with TYLCV-specific primers (TYLCV-F: 5'-ATATTACCGGATGGCCGCGCCT-3', CV-R: 5'-TCCACGGGGAACATCAGGGCTT-3'). Single-stranded as well as double-stranded TYLCV DNA were identified from all organs of symptomatic eustoma, indicating TYLCV can replicate and move systemically in eustoma plants. Whitefly (Bemisia tabaci)-mediated plant-to-plant viral transmission was performed with one TYLCV-infected eustoma plant and five healthy eustoma plants and revealed that 80% (4 of 5) of the eustoma plants were infected by whitefly-mediated transmission. These results indicate that TYLCV-infected eustoma plants could act as virus reservoirs to healthy eustoma plants as well as other potential TYLCV hosts, such as tomatoes. In Korea, TYLCV has been the most notorious plant virus since 2008 (3), but, until now, TYLCV infection in eustoma plants has not been reported in Korea. References: (1) C. C. Chen et al. Plant Dis. 84:506, 2000. (2) A. Kritzman et al. Plant Dis. 84:1185, 2000. (3) H. Lee et al. Mol. Cells 30:467, 2010.
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Affiliation(s)
- E-J Kil
- Department of Genetic Engineering, Sungkyunkwan University, Suwon, Korea
| | - H-S Byun
- Department of Genetic Engineering, Sungkyunkwan University, Suwon, Korea
| | - S Kim
- Department of Genetic Engineering, Sungkyunkwan University, Suwon, Korea
| | - H Hwang
- Department of Genetic Engineering, Sungkyunkwan University, Suwon, Korea
| | - M-K Kim
- Department of Genetic Engineering, Sungkyunkwan University, Suwon, Korea
| | - C-S Kim
- Department of Genetic Engineering, Sungkyunkwan University, Suwon, Korea
| | - H-S Choi
- Crop Protection Division, National Institute of Agricultural Science, Rural Development Administration, Suwon, Korea
| | - K-Y Lee
- Institute of Plant Medicine, Kyungpook National University, Daegu, Korea
| | - S Lee
- Department of Genetic Engineering, Sungkyunkwan University, Suwon, Korea
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Kil EJ, Kim J, Byun HS, Kwak HR, Kim MK, Choi HS, Chung MN, Lee S. First Report of Sweet potato golden vein associated virus Infecting Sweet Potato in Korea. Plant Dis 2014; 98:1163. [PMID: 30708825 DOI: 10.1094/pdis-02-14-0123-pdn] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Sweet potato (Ipomoea batatas) is one of the most important crops in eastern Asia, including Korea. Consumption of sweet potato is increasing gradually because of its growing reputation as a health food. Recently, outbreaks of viruses infecting sweet potatoes have increased all over the world, probably because sweet potatoes are produced via vegetative propagation (1,2). In Korea, most sweet potatoes in fields have been infected by a begomovirus, Sweet potato leaf curl virus (SPLCV), and other viruses such as Sweet potato feathery mottle virus, Sweet potato virus G, and Sweet potato latent virus (3). Many countries have monitored sweet potato virus infections in fields as well as in germplasm collections to select virus-free stocks. In 2013, 20 sweet potato plants showing leaf roll symptoms in Muan, South Korea, were collected and analyzed. Total DNA was isolated from sweet potato leaves (Viral Gene-spin Viral DNA/RNA Extraction Kit, iNtRON Biotechnology, Seongnam, Korea) and viral DNA was amplified by rolling circle amplification (RCA, TempliPhi Amplification Kit, GE Healthcare Life Sciences, Uppsala, Sweden) following the manufacturer's instructions. Amplicons were digested by restriction enzyme SacI (TaKaRa Bio, Shiga, Japan) and products were run on a 1.5% agarose gel. A 2.8-kb DNA fragment was purified from a gel, ligated into a pGEM-T easy vector (Promega, Madison, WI), and sequenced (Macrogen, Seoul, Korea). Based on a BLAST search, most of the sequences (36/38) were identified as SPLCV, but two independent clones 2,824 nt in length from sweet potato cv. Sincheonmi were similar to Sweet potato golden vein associated virus (SPGVaV) isolate US:MS:1B-3 (94.38%, GenBank Accession No. HQ333143). The complete genome sequence of the SPGVaV-Korea isolate contained six ORFs, as expected for a typical monopartite begomovirus. The sequence was deposited in GenBank under accession number KF803170. SPGVaV is a whitefly (Bemisia tabaci)-transmitted virus (genus Begomovirus, family Geminiviridae). A phylogenetic analysis that included other begomoviruses that infect sweet potato showed SPGVaV-Korea to segregate with other SPGVaV isolates. SPGVaV has previously only been reported in Brazil and the United States (1). This is the first report of SPGVaV in sweet potato outside of the Americas. References: (1) L. C. Albuquerque et al. Virol. J. 9:241, 2012. (2) E. Choi et al. Acta Virol. 56:187, 2012. (3) H. R. Kwak et al. Plant Pathol. J. 22:239, 2006.
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Affiliation(s)
- E-J Kil
- Department of Genetic Engineering, Sungkyunkwan University, Suwon, Korea
| | - J Kim
- Department of Genetic Engineering, Sungkyunkwan University, Suwon, Korea
| | - H-S Byun
- Department of Genetic Engineering, Sungkyunkwan University, Suwon, Korea
| | - H-R Kwak
- Department of Genetic Engineering, Sungkyunkwan University, Suwon, Korea
| | - M-K Kim
- Department of Genetic Engineering, Sungkyunkwan University, Suwon, Korea
| | - H-S Choi
- Crop Protection Division, National Institute of Agricultural Science, Rural Development Administration, Suwon, Korea
| | - M-N Chung
- Bioenergy Crop Research Center, National Institute of Crop Science, Rural Development Administration, Muan, Korea
| | - S Lee
- Department of Genetic Engineering, Sungkyunkwan University, Suwon, Korea
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Reese TA, Wakeman BS, Choi HS, Hufford MM, Huang SC, Zhang X, Buck MD, Jezewski A, Kambal A, Liu CY, Goel G, Murray PJ, Xavier RJ, Kaplan MH, Renne R, Speck SH, Artyomov MN, Pearce EJ, Virgin HW. Helminth infection reactivates latent γ-herpesvirus via cytokine competition at a viral promoter. Science 2014; 345:573-7. [PMID: 24968940 DOI: 10.1126/science.1254517] [Citation(s) in RCA: 148] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Mammals are coinfected by multiple pathogens that interact through unknown mechanisms. We found that helminth infection, characterized by the induction of the cytokine interleukin-4 (IL-4) and the activation of the transcription factor Stat6, reactivated murine γ-herpesvirus infection in vivo. IL-4 promoted viral replication and blocked the antiviral effects of interferon-γ (IFNγ) by inducing Stat6 binding to the promoter for an important viral transcriptional transactivator. IL-4 also reactivated human Kaposi's sarcoma-associated herpesvirus from latency in cultured cells. Exogenous IL-4 plus blockade of IFNγ reactivated latent murine γ-herpesvirus infection in vivo, suggesting a "two-signal" model for viral reactivation. Thus, chronic herpesvirus infection, a component of the mammalian virome, is regulated by the counterpoised actions of multiple cytokines on viral promoters that have evolved to sense host immune status.
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Affiliation(s)
- T A Reese
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - B S Wakeman
- Emory University Vaccine Center, Atlanta, GA 30322, USA
| | - H S Choi
- Department of Molecular Genetics and Microbiology, University of Florida, Gainesville, FL 32610, USA
| | - M M Hufford
- Departments of Pediatrics and Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - S C Huang
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - X Zhang
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - M D Buck
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - A Jezewski
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - A Kambal
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - C Y Liu
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - G Goel
- Center for Computational and Integrative Biology and Gastrointestinal Unit, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - P J Murray
- Departments of Infectious Diseases and Immunology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - R J Xavier
- Center for Computational and Integrative Biology and Gastrointestinal Unit, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - M H Kaplan
- Departments of Pediatrics and Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - R Renne
- Department of Molecular Genetics and Microbiology, University of Florida, Gainesville, FL 32610, USA
| | - S H Speck
- Emory University Vaccine Center, Atlanta, GA 30322, USA
| | - M N Artyomov
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - E J Pearce
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - H W Virgin
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA.
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Choi HS, Sawamura M. Volatile Flavor Components of Ripe and Overripe Ki-mikans (Citrus flaviculpus Hort. ex Tanaka) in Comparison with Hyuganatsu (Citrus tamurana Hort. ex Tanaka). Biosci Biotechnol Biochem 2014; 65:48-55. [PMID: 11272845 DOI: 10.1271/bbb.65.48] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [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: 11/08/2022]
Abstract
The volatile flavor components of ripe and overripe ki-mikan (Citrus flaviculpus Hort. ex Tanaka) peel oil samples, which had been isolated by cold-pressing, were investigated by capillary GC and GC-MS, and compared with the Hyuganatsu (Citrus tamurana Hort. ex Tanaka) flavor. Limonene (ripe fruit, 82.44%; overripe fruit, 73.10%) was the most abundant compound in the ki-mikan oil, this being followed by gamma-terpinene (8.83% and 13.74%), trans-beta-farnesene (1.76% and 3.12%) and myrcene (1.54% and 1.13%). The composition of overripe ki-mikan oil was characterized by higher amounts of aliphatic and sesquiterpene hydrocarbons, monoterpene and sesquiterpene alcohols, ketones and esters than that of ripe ki-mikan oil. Monoterpene hydrocarbons, especially limonene (84.78%), were predominant in Hyuganatsu oil. The CPO composition of ki-mikan was qualitatively similar to that of Hyuganatsu, but differed quantitatively. The content of sesquiterpene hydrocarbons was higher in the ki-mikan oil samples than in Hyuganatsu oil, while ketones showed the opposite predominance. These differences were more evident in the trans-beta-farnesene and l-carvone contents. The ratio of both these compounds could be used to distinguish ki-mikan oil from Hyuganatsu oil.
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Affiliation(s)
- H S Choi
- Department of Bioresources Science, Faculty of Agriculture, Kochi University, Nankoku, Japan
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Shin KE, Ahn KJ, Choi HS, Jung SL, Kim BS, Jeon SS, Hong YG. DCE and DSC MR perfusion imaging in the differentiation of recurrent tumour from treatment-related changes in patients with glioma. Clin Radiol 2014; 69:e264-72. [PMID: 24594379 DOI: 10.1016/j.crad.2014.01.016] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [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: 10/01/2013] [Revised: 01/09/2014] [Accepted: 01/16/2014] [Indexed: 01/04/2023]
Abstract
AIM To retrospectively compare the utility of perfusion magnetic resonance imaging (MRI) in distinguishing treatment-related changes from recurrent disease in glioma patients. MATERIALS AND METHODS Thirty-one patients with histologically diagnosed gliomas and increased enhancement after or during concurrent (chemo-) radiation therapy were enrolled. They underwent dynamic contrast-enhanced (DCE) permeability MRI followed by dynamic susceptibility contrast (DSC) perfusion MRI. The vascular transfer constant (rK(trans)) and initial areas under the concentration curve (riAUC) were obtained from DCE MRI, and cerebral blood volume (rCBV) was obtained from DSC MRI. Patients were classified as having treatment-related changes or recurrent tumours based on clinicoradiological results or pathological results from surgery. RESULTS Nineteen patients were diagnosed as having recurrences and 12 patients as having treatment-related changes. The rK(trans), riAUC, and rCBV values in the recurrent group were significantly higher than the values in the group with treatment-related changes (p < 0.05). For all 31 patients, there was no significant difference between DSC MRI and DCE MRI for the differentiating power between recurrence and treatment-related changes (p = 0.7227). However, when including only the 24 patients with concordant values of rK(trans) and riAUC, DCE MRI showed a significant AUC value of 0.786 in the receiver operating characteristic (ROC) curve analysis (p = 0.003), whereas DSC MRI did not (AUC = 0.643, p = 0.229). CONCLUSION MRI perfusion images appear to show promise in distinguishing treatment-related changes from recurrent tumours. When both rK(trans) and riAUC show concordant values, DCE MRI seems to be more powerful than DSC MRI in the differentiation of recurrence from treatment-related changes.
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Affiliation(s)
- K E Shin
- Diagnostic Radiology, Kyung-Hee University Medical Center, Hoegi-dong, Dongdaemun-gu, Republic of Korea
| | - K J Ahn
- Department of Radiology, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
| | - H S Choi
- Department of Radiology, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - S L Jung
- Department of Radiology, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - B S Kim
- Department of Radiology, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - S S Jeon
- Department of Neurosurgery, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Y G Hong
- Department of Neurosurgery, Seoul St Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
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Song MK, Lee HS, Choi HS, Shin CY, Kim YJ, Park YK, Ryu JC. Octanal-induced inflammatory responses in cells relevant for lung toxicity. Hum Exp Toxicol 2013; 33:710-21. [DOI: 10.1177/0960327113506722] [Citation(s) in RCA: 10] [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: 01/08/2023]
Abstract
Inhalation is an important route of aldehyde exposure, and lung is one of the main targets of aldehyde toxicity. Octanal is distributed ubiquitously in the environment and is a component of indoor air pollutants. We investigated whether octanal exposure enhances the inflammatory response in the human respiratory system by increasing the expression and release of cytokines and chemokines. The effect of octanal in transcriptomic modulation was assessed in the human alveolar epithelial cell line A549 using oligonucleotide arrays. We identified a set of genes differentially expressed upon octanal exposure that may be useful for monitoring octanal pulmonary toxicity. These genes were classified according to the Gene Ontology functional category and Kyoto Encyclopedia of Genes and Genomes analysis to explore the biological processes related to octanal-induced pulmonary toxicity. The results show that octanal affects the expression of several chemokines and inflammatory cytokines and increases the levels of interleukin 6 (IL-6) and IL-8 released. In conclusion, octanal exposure modulates the expression of cytokines and chemokines important in the development of lung injury and disease. This suggests that inflammation contributes to octanal-induced lung damage and that the inflammatory genes expressed should be studied in detail, thereby laying the groundwork for future biomonitoring studies.
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Affiliation(s)
- M-K Song
- Center for Integrated Risk Research, Cellular and Molecular Toxicology Laboratory, Korea Institute of Science and Technology, Cheongryang, Seoul, Korea
- School of Life Sciences and Biotechnology, Korea University, Anam-Dong, Seoungbuk-Gu, Seoul, Korea
| | - H-S Lee
- Center for Integrated Risk Research, Cellular and Molecular Toxicology Laboratory, Korea Institute of Science and Technology, Cheongryang, Seoul, Korea
| | - H-S Choi
- Center for Integrated Risk Research, Cellular and Molecular Toxicology Laboratory, Korea Institute of Science and Technology, Cheongryang, Seoul, Korea
| | - C-Y Shin
- Center for Integrated Risk Research, Cellular and Molecular Toxicology Laboratory, Korea Institute of Science and Technology, Cheongryang, Seoul, Korea
| | - Y-J Kim
- Department of Marine Sciences, Incheon National University, Yeonsu-gu, Incheon, Korea
| | - Y-K Park
- School of Life Sciences and Biotechnology, Korea University, Anam-Dong, Seoungbuk-Gu, Seoul, Korea
| | - J-C Ryu
- Center for Integrated Risk Research, Cellular and Molecular Toxicology Laboratory, Korea Institute of Science and Technology, Cheongryang, Seoul, Korea
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Song Y, Choi HS, Kim K, Kim Y, Kim BG, Hong D, Keum B, Chun HJ. A simple novel endoscopic successive suture device: a validation study for closure strength and reproducibility. Endoscopy 2013; 45:655-60. [PMID: 23881806 DOI: 10.1055/s-0033-1344214] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
BACKGROUND AND STUDY AIMS Endoscopic surgical technology has been developing rapidly. Although several successful endoscopic closure devices have already been introduced, only a few of them have demonstrated improvements in closure strength and reproducibility over conventional endoscopic clip closures or hand sutures. The objective of this study was to test the feasibility of a novel successive suturing device (SSD) by measuring closure strength and reproducibility. MATERIAL AND METHODS Porcine stomach models were used in this study. Endoclips, full-thickness hand sutures, and the novel SSD sutures were used to close a perforation in the stomach wall, with 10 stomachs being tested for each closure method. Endoclips and SSD sutures were performed using a two-channel endoscope, and the hand sutures were performed from outside of the stomach wall. Air leakage pressure was measured to determine the closure strength and reproducibility of each method. RESULTS The mean air leakage pressure of the SSD closure was 62.7 ± 8.2 mmHg. SSD-treated stomachs exhibited significantly greater air leakage pressure than Endoclip-treated stomachs. The standard deviation of bursting pressure in SSD stomachs was found to be significantly smaller than that of hand-sewn stomachs but was not different from that of Endoclip stomachs. CONCLUSIONS The consistent closure strength of SSD stomachs demonstrated the reliability and reproducibility of this new closure method. These promising results in closure strength and reproducibility suggest the feasibility of the proposed device for clinical applications.
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Affiliation(s)
- Y Song
- Department of Mechanical Engineering, Korea University, Seoul, Korea
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Choi E, Lee G, Park J, Lee TK, Choi HS, Lee S. Molecular characterization and an infectious clone construction of sweet potato leaf curl virus (SPLCV) isolated from Korea. Acta Virol 2013; 56:187-98. [PMID: 23043598 DOI: 10.4149/av_2012_03_187] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
UNLABELLED Sweet potato leaf curl disease (SPLCD) was primarily identified in sweet potato fields in Korea in 2003, and the complete genomic sequence of sweet potato leaf curl virus (SPLCV) has been cloned. The genome of the Korean SPLCV isolate (SPLCV-KR) comprises 2,828 nucleotides with six open reading frames in DNA-A, similar to a monopartite begomovirus. Additionally, neither the genome B genomic component nor the DNA beta sequence was detected. The results of phylogenetic analysis using the maximum parsimony method showed that SPLCV-KR is more closely related to SPLCV-US (US) than SPLCV-CN (China) and SPLCV-JP (Japan). A tandem repeat dimer of SPLCV-KR was cloned and found to be infectious in sweet potatoes (Ipomoea batatas) via biolistic inoculation. The SPLCV-infected sweet potatoes exhibited mild leaf curl symptoms of SPLCD, and the newly-replicated viral DNA was detected via Southern blot analysis. Results of biotic, molecular, and phylogenetic characterization suggest that SPLCV-KR is a new strain of SPLCV and is importantly placed in the evolutionary progression from curtoviruses to begomoviruses. KEYWORDS sweet potato leaf curl virus; sweet potato leaf curl disease; phylogenetic analysis; infectious clone; biolistic infection.
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Affiliation(s)
- E Choi
- Department of Genetic Engineering, Sungkyunkwan University, Suwon, 440-746, Korea
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41
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Kim JE, Jo BY, Oh HM, Choi HS, Lee Y. High anxiety, young age and long waits increase the need for preoperative sedatives in children. J Int Med Res 2013; 40:1381-9. [PMID: 22971489 DOI: 10.1177/147323001204000416] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE This prospective, observational study aimed to identify children likely to require sedation preoperatively by measuring anxiety levels using the modified Yale Preoperative Anxiety Scale (mYPAS). Other possible predictive factors for preoperative sedation were also investigated. METHODS A total of 455 patients aged 2-12 years scheduled for surgery requiring general anaesthesia were enrolled in the study. Patients' anxiety levels were measured using the mYPAS in a preoperative holding area just before patients were separated from their parents or guardians and entered the operating theatre. Anaesthetists blindedto the mYPAS assessments judged whether the child could be separated and enter the operating theatre without a sedative. The ability of the mYPAS to predict the need for preoperative sedation was analysed by receiver operating characteristic (ROC) curve analysis. RESULTS The optimum mYPAS cut-off for requiring sedatives was 41.7 according to ROC curve analysis. Multivariate logistic regression analysis showed that age, mYPAS>40 and waiting time were independent predictors of the requirement for sedative administration. CONCLUSIONS High anxiety levels, young age and long waits contributed to the need for preoperative sedation in children.
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Affiliation(s)
- J E Kim
- Department of Anaesthesiology and Pain Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
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42
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Lee WY, Chai SY, Lee KH, Park HJ, Kim JH, Kim B, Kim NH, Jeon HS, Kim IC, Choi HS, Song H. Identification of the DDAH2 Protein in Pig Reproductive Tract Mucus: A Putative Oestrus Detection Marker. Reprod Domest Anim 2013; 48:e13-6. [DOI: 10.1111/j.1439-0531.2012.02122.x] [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: 11/26/2022]
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43
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Kim SH, Choi HS, Koh SH, Hwang CS, Lee WS. The revaluation of a single low dose of streptomycin powder in chemical labyrinthectomy for Ménière's disease: our experience in ninety-eight patients. Clin Otolaryngol 2012; 37:491-6. [PMID: 23253345 DOI: 10.1111/j.1749-4486.2012.02531.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- S H Kim
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, South Korea
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Lee SP, Lee HL, Kim DC, Lee KN, Lee OY, Choi HS, Yoon BC, Jun DW, Hahm JS, Joo YW. Percutaneous endoscopic gastrostomy using 10-cc syringe tubes for amyotrophic lateral sclerosis patients with limited mouth opening. Endoscopy 2012; 44 Suppl 2 UCTN:E190-1. [PMID: 22622738 DOI: 10.1055/s-0032-1306796] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- S P Lee
- Department of Internal Medicine, Hanyang University College of Medicine, Seoul, Korea
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Khanal P, Yun HJ, Lim SC, Ahn SG, Yoon HE, Kang KW, Hong R, Choi HS. Proyl isomerase Pin1 facilitates ubiquitin-mediated degradation of cyclin-dependent kinase 10 to induce tamoxifen resistance in breast cancer cells. Oncogene 2012; 31:3845-56. [PMID: 22158035 DOI: 10.1038/onc.2011.548] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [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: 02/07/2023]
Abstract
Endocrine therapies that inhibit estrogen receptor (ER)-α signaling are the most common and effective treatment for ER-α-positive breast cancer. However, the use of these agents is limited by the frequent development of resistance. The aim of this study was to elucidate the mechanisms by which downregulation of CDK10 expression confers resistance to tamoxifen in breast cancer. Here, we show that peptidyl-prolyl isomerase Pin1 downregulates CDK10 protein as a result of its interaction with and ubiquitination of CDK10, thereby affecting CDK10-dependent Raf-1 phosphorylation (S338). Pin1(-/-) mouse embryonic fibroblasts (MEFs) show higher CDK10 expression than Pin1(+/+) MEFs, whereas CDK10 protein was downregulated in the rescued Pin1(-/-) MEFs after reexpression of Pin1. Pin1 silencing in SKBR-3 and MCF7 cells increased the CDK10 expression. In human tamoxifen-resistant breast cancer and tamoxifen-resistant MCF7 cells, immunohistochemical staining and immunoblotting analysis shows an inverse correlation between the expression of CDK10 and the degree of tamoxifen resistance. There was also a positive correlation between the high level of P-Raf-1 (Ser338) and Pin1 in human tamoxifen-resistant breast cancer and tamoxifen-resistant MCF7 (TAMR-MCF7) cells. Importantly, 4-OH tamoxifen (4-OHT), when used in combination with overexpressed CDK10 or Raf-1 inhibitor, increased cleaved PARP and DNA fragmentation to inhibit cologenic growth of MCF7 cells and Tamoxifen-resistant MCF7 cells, respectively. On the basis of these findings, we suggest that the Pin1-mediated CDK10 ubiquitination is a major regulator of tamoxifen-resistant breast cancer cell growth and survival.
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Affiliation(s)
- P Khanal
- BK21 Project Team, College of Pharmacy, Chosun University, Gwangju, Republic of Korea
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Suh JH, Han KS, Kim BC, Hong CW, Sohn DK, Chang HJ, Kim MJ, Park SC, Park JW, Choi HS, Oh JH. Predictors for lymph node metastasis in T1 colorectal cancer. Endoscopy 2012; 44:590-5. [PMID: 22638780 DOI: 10.1055/s-0031-1291665] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
BACKGROUND AND STUDY AIMS It is critical that the risk of lymph node metastasis (LNM) is evaluated for determining the suitability of endoscopic resection for T1 colorectal cancer (CRC). Reported risk factors for LNM in completely resected T1 CRC are deep submucosal invasion, grade 3, angiolymphatic invasion, and budding. The aim of the present study was to identify the histopathologic factors associated with LNM in T1 CRC. PATIENTS AND METHODS The study involved 435 patients with T1 CRC treated by endoscopic or surgical resection between January 2001 and April 2010 at the National Cancer Center, Korea. The 435 patients were classified into two groups - those undergoing surgical resection (n = 324) and those undergoing endoscopic resection (n = 111). In the surgically resected group, details regarding depth of submucosal invasion, angiolymphatic invasion, tumor grade, budding, and background adenoma (BGA) were evaluated with respect to presence or absence of LNM. In the endoscopically resected group, the results of follow-ups and additional salvage surgeries were studied. RESULTS In the surgically resected group, LNM was detected in 42 patients (13.0 %). Grade 3, angiolymphatic invasion, budding, and the absence of BGA were identified as factors associated with LNM in univariate and multivariate analyses (P < 0.05). Among the 50 patients in the endoscopically resected group with high risk, three were diagnosed as being LNM-positive during the follow-up period. There was no LNM in the endoscopically resected group with low risk. CONCLUSIONS Grade 3, angiolymphatic invasion, budding, and the absence of BGA are the risk factors that predict LNM in patients with T1 CRC. In cases where endoscopically resected T1 CRC has no risk factor, cautious follow-up could be recommended. However, if the tumor has any risk factor, additional surgical resection should be considered.
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Affiliation(s)
- J H Suh
- Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea
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Kwon OW, Jun DW, Lee SM, Lee KN, Lee HL, Lee OY, Yoon BC, Choi HS. Carbohydrate but not fat is associated with elevated aminotransferases. Aliment Pharmacol Ther 2012; 35:1064-72. [PMID: 22428533 DOI: 10.1111/j.1365-2036.2012.05061.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2011] [Revised: 01/04/2012] [Accepted: 02/24/2012] [Indexed: 12/15/2022]
Abstract
BACKGROUND Recently, many studies reported that high carbohydrate and simple sugar intake increase a risk of obesity and metabolic syndrome significantly. AIM To investigate the effect of carbohydrate on aminotransferase levels in Korea, where the proportion of carbohydrate in meals is extremely high but fat is low. METHODS We used the data of Korean National Health and Nutrition Examination Surveys (KNHANES). A total of 19 749 people were included. Amounts and types of consumed foods were examined by the 24 h recall method. RESULTS Mean carbohydrate and fat proportions in total energy intake were 67.7% and 17.4%, respectively. Aminotransferase activity increased according to the rise of the proportion of carbohydrate in the energy intake. A high carbohydrate intake (>70% of energy) was associated with abnormal aminotransferase activity and metabolic syndrome. After adjusting for covariates, such as age, energy intake and body mass index, abnormal aminotransferase activity was significantly associated with carbohydrate proportion. There was a negative correlation between fat proportion in the total energy intake and aminotransferase activity (P < 0.01). The relation between aminotransferase activity and carbohydrate composition showed a J-shaped curve. The lowest point (the J point) was located at 50-60% carbohydrate. CONCLUSIONS The proportion of carbohydrate in energy intake but not fat is positively correlated with abnormal aminotransferase activity in Koreans. This finding may be useful in planning a strategy of nutrition education for NAFLD in countries where the proportion of carbohydrate in most meals is extremely high.
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Affiliation(s)
- O W Kwon
- Department of Internal Medicine, Hanyang University College of Medicine, Seoul, Korea
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Kim YD, Kim YH, Cho YM, Kim DK, Ahn SW, Lee JM, Chanda D, Shong M, Lee CH, Choi HS. Metformin ameliorates IL-6-induced hepatic insulin resistance via induction of orphan nuclear receptor small heterodimer partner (SHP) in mouse models. Diabetologia 2012; 55:1482-94. [PMID: 22349108 DOI: 10.1007/s00125-012-2494-4] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [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] [Received: 11/23/2011] [Accepted: 01/09/2012] [Indexed: 01/14/2023]
Abstract
AIMS/HYPOTHESIS IL-6 is a proinflammatory cytokine associated with the pathogenesis of hepatic diseases. Metformin is an anti-diabetic drug used for the treatment of type 2 diabetes, and orphan nuclear receptor small heterodimer partner (SHP, also known as NR0B2), a transcriptional co-repressor, plays an important role in maintaining metabolic homeostasis. Here, we demonstrate that metformin-mediated activation of AMP-activated protein kinase (AMPK) increases SHP protein production and regulates IL-6-induced hepatic insulin resistance. METHODS We investigated metformin-mediated SHP production improved insulin resistance through the regulation of an IL-6-dependent pathway (involving signal transducer and activator of transcription 3 [STAT3] and suppressor of cytokine signalling 3 [SOCS3]) in both Shp knockdown and Shp null mice. RESULTS IL-6-induced STAT3 transactivation and SOCS3 production were significantly repressed by metformin, adenoviral constitutively active AMPK (Ad-CA-AMPK), and adenoviral SHP (Ad-SHP), but not in Shp knockdown, or with the adenoviral dominant negative form of AMPK (Ad-DN-AMPK). Chromatin immunoprecipitation (ChIP), co-immunoprecipitation (Co-IP) and protein localisation studies showed that SHP inhibits DNA binding of STAT3 on the Socs3 gene promoter via interaction and colocalisation within the nucleus. Upregulation of inflammatory genes and downregulation of hepatic insulin signalling by acute IL-6 treatment were observed in wild-type mice but not in Shp null mice. Finally, chronic IL-6 exposure caused hepatic insulin resistance, leading to impaired insulin tolerance and elevated gluconeogenesis, and these phenomena were aggravated in Shp null mice. CONCLUSIONS/INTERPRETATION Our results demonstrate that SHP upregulation by metformin may prevent hepatic disorders by regulating the IL-6-dependent pathway, and that this pathway can help to ameliorate the pathogenesis of cytokine-mediated metabolic dysfunction.
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Affiliation(s)
- Y D Kim
- National Creative Research Initiatives Center for Nuclear Receptor Signals, Hormone Research Center, School of Biological Sciences and Technology, Chonnam National University, Gwangju 500-757, Republic of Korea
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Jeon K, Choi WI, An JS, Lim SY, Kim WJ, Park GM, Park SS, Choi HS, Lee BH, Choi JC, Na MJ, Park J, Kim JY. Paradoxical response in HIV-negative patients with pleural tuberculosis: a retrospective multicentre study. Int J Tuberc Lung Dis 2012; 16:846-51. [PMID: 22507441 DOI: 10.5588/ijtld.11.0642] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE To evaluate the incidence, clinical characteristics and predicting factors for the development of paradoxical response in human immunodeficiency virus negative patients with isolated pleural tuberculosis (TB). DESIGN A multicentre, retrospective cohort study including 458 patients who were diagnosed and treated with isolated pleural TB between March 2005 and February 2010. RESULTS Paradoxical response developed in 72 patients (16%) with isolated pleural TB. The mean time to development of paradoxical response was 8.8 ± 6.4 weeks after initiation of anti-tuberculosis treatment. The main presentation of paradoxical response was aggravation of pre-existing pleural effusion in 58 patients (81%). However, the majority of the patients who developed paradoxical response had no associated symptoms (n = 49, 68%). In multiple logistic regression analysis, development of paradoxical response was independently associated with the proportion of eosinophils (adjusted OR 1.293, 95%CI 1.077-1.553) and protein concentrations (adjusted OR 0.590, 95%CI 0.397-0.878) in the pleural fluid at the time of diagnosis. CONCLUSION Paradoxical response developed in 16% of the patients approximately 2 months after initiation of anti-tuberculosis treatment, presenting with aggravation of pre-existing pleural effusion. Development of paradoxical response was associated with the proportion of eosinophils and protein concentrations in the pleural fluid at the time of diagnosis.
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Affiliation(s)
- K Jeon
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
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