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Lee M, Chae SA, Lee YJ, Jeon HJ, Hong SC, Shin M, Jung YH, Yang J. Cell-free supernatant of Lactococcus lactis IDCC 2301 exerts anti-inflammatory effects in LPS-induced macrophages via NF-κB and MAPK signaling pathways. Benef Microbes 2024:1-11. [PMID: 38677715 DOI: 10.1163/18762891-bja00008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 03/27/2024] [Indexed: 04/29/2024]
Abstract
This study investigated the anti-inflammatory effects of cell-free supernatant of Lactococcus lactis IDCC 2301 on lipopolysaccharide (LPS)-induced RAW 264.7 macrophages. Expression of inflammatory mediators and cytokines, and the production of nitric oxide (NO) and prostaglandin E2 (PGE2) were qualitatively analysed. The expression of signal transductors in inflammatory cascades was quantified by western blot. Treatment with cell-free supernatant of L. lactis IDCC 2301 significantly decreased the mRNA expression levels of tumour necrosis factor (TNF-α) and interleukins including IL-1β and IL-6. The levels of inducible nitric oxide synthase (iNOS) and cyclooxygenase (COX-2) were also remarkably reduced in LPS-induced macrophages after the treatment. Furthermore, L. lactis IDCC 2301 reduced the levels of both dephosphorylated and phosphorylated forms of nuclear factor-kappa B (NF-κB), IκB-α, extracellular signal-regulated kinases (ERK), c-Jun amino-terminal kinases (JNK), and p38 in LPS-induced RAW 264.7 cells. Therefore, L. lactis IDCC 2301 shows anti-inflammatory activity by suppressing the NF-κB and mitogen-activated protein kinase (MAPK) signaling pathways.
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Affiliation(s)
- M Lee
- Ildong Bioscience, Pyeongtaek-si, Gyeonggi-do 17957, Republic of Korea
| | - S A Chae
- Ildong Bioscience, Pyeongtaek-si, Gyeonggi-do 17957, Republic of Korea
| | - Y J Lee
- School of Food Science and Biotechnology, Kyungpook National University, Daegu 41566, Republic of Korea
| | - H J Jeon
- School of Food Science and Biotechnology, Kyungpook National University, Daegu 41566, Republic of Korea
| | - S-C Hong
- Department of Food Science and Biotechnology, Kunsan National University, Gunsan 54150, Republic of Korea
| | - M Shin
- Department of Microbiology, College of Medicine, Inha University, Incheon, 22212, Republic of Korea
| | - Y H Jung
- School of Food Science and Biotechnology, Kyungpook National University, Daegu 41566, Republic of Korea
| | - J Yang
- Department of Microbiology, College of Medicine, Dongguk University, Gyeongju, 38066, Republic of Korea
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Shin M, Ban OH, Jung YH, Yang J, Kim Y. Genomic characterization and probiotic potential of Lactobacillus casei IDCC 3451 isolated from infant faeces. Lett Appl Microbiol 2021; 72:578-588. [PMID: 33421164 DOI: 10.1111/lam.13449] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Revised: 12/11/2020] [Accepted: 12/28/2020] [Indexed: 01/02/2023]
Abstract
Probiotics play an important role in health benefits on the host. However, they also possess potentials for infectivity or in situ toxin production; thus, requiring a comprehensive assessment of their safety. In this study, we report genomic characteristics of a newly isolated Lactobacillus casei IDCC 3451 from infant faeces. Phenotypic assays based on enzyme activities and carbohydrate fermentation profiles represented metabolic features of the strain. Safety evaluation for antimicrobial resistance, biogenic amines production and cytotoxicity to a murine mouse model suggested its safe use as a probiotic strain. Our findings on the genetic background of L. casei IDCC 3451 and its potential features provide a promising functional and safe probiotic strain for the human consumption.
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Affiliation(s)
- M Shin
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Science, Seoul National University, Seoul, Republic of Korea
| | - O-H Ban
- Ildong Bioscience, Gyeonggi-do, Republic of Korea
| | - Y H Jung
- School of Food Science and Biotechnology, Kyungpook National University, Daegu, Republic of Korea
| | - J Yang
- Ildong Bioscience, Gyeonggi-do, Republic of Korea
| | - Y Kim
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Science, Seoul National University, Seoul, Republic of Korea
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Kim YJ, Jeong WJ, Bae YJ, Kim H, Choi BS, Jung YH, Baik SH, Sunwoo L, Kim JH. MRI-Based Assessment of the Pharyngeal Constrictor Muscle as a Predictor of Surgical Margin after Transoral Robotic Surgery in HPV-Positive Tonsillar Cancer. AJNR Am J Neuroradiol 2020; 41:2320-2326. [PMID: 33060104 DOI: 10.3174/ajnr.a6806] [Citation(s) in RCA: 2] [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] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 07/29/2020] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Transoral robotic surgery is an emerging strategy for treating human papillomavirus-positive cancers, but the role of MR imaging in predicting the surgical outcome has not been established. We aimed to identify preoperative MR imaging characteristics that predispose the outcome of transoral robotic surgery toward an insecure (positive or close) surgical margin in human papillomavirus-positive tonsillar squamous cell carcinoma. MATERIALS AND METHODS Between December 2012 and May 2019, sixty-nine patients underwent transoral robotic surgery at our institution. Among these, 29 who were diagnosed with human papillomavirus-positive tonsillar squamous cell carcinoma, did not receive neoadjuvant treatment, underwent preoperative 3T MR imaging, and had postoperative pathologic reports and were included in this retrospective study. Two neuroradiologists evaluated the preoperative MR imaging scans to determine the tumor spread through the pharyngeal constrictor muscle using a 5-point scale: 1, normal constrictor; 2, bulging constrictor; 3, thinning constrictor; 4, obscured constrictor; and 5, tumor protrusion into the parapharyngeal fat. The risk of an insecure surgical margin (involved or <1 mm) according to the MR imaging scores was predicted using logistic regression with the Firth correction. RESULTS The interobserver agreement for the MR imaging scores was excellent (κ = 0.955, P < .001). A score of ≥4 could predict an insecure margin with 87.5% sensitivity and 92.3% specificity (area under the curve = 0.899) and was the only significant factor associated with an insecure margin in the multivariable analysis (OR, 6.59; 95% CI, 3.11-22.28; P < .001). CONCLUSIONS The pre-transoral robotic surgery MR imaging scoring system for the pharyngeal constrictor muscle is a promising predictor of the surgical margin in human papillomavirus-positive tonsillar squamous cell carcinoma.
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Affiliation(s)
- Y J Kim
- From the Department of Radiology (Y.J.K., Y.J.B., B.S.C., S.H.B., L.S., J.H.K.)
| | - W-J Jeong
- Otolaryngology-Head and Neck Surgery (W.-J.J., Y.H.J.)
| | - Y J Bae
- From the Department of Radiology (Y.J.K., Y.J.B., B.S.C., S.H.B., L.S., J.H.K.)
| | - H Kim
- Pathology (H.K.), Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - B S Choi
- From the Department of Radiology (Y.J.K., Y.J.B., B.S.C., S.H.B., L.S., J.H.K.)
| | - Y H Jung
- Otolaryngology-Head and Neck Surgery (W.-J.J., Y.H.J.)
| | - S H Baik
- From the Department of Radiology (Y.J.K., Y.J.B., B.S.C., S.H.B., L.S., J.H.K.)
| | - L Sunwoo
- From the Department of Radiology (Y.J.K., Y.J.B., B.S.C., S.H.B., L.S., J.H.K.)
| | - J H Kim
- From the Department of Radiology (Y.J.K., Y.J.B., B.S.C., S.H.B., L.S., J.H.K.)
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Cho BH, Cheon K, Lee KY, Jung YH, Han SW, Park JH, Choi HY, Cho HJ, Park HJ, Nam HS, Heo JH, Lee HS, Kim S, Kim YD. Association between body mass index and stroke severity in acute ischaemic stroke with non-valvular atrial fibrillation. Eur J Neurol 2020; 27:1672-1679. [PMID: 32392368 DOI: 10.1111/ene.14304] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Accepted: 04/30/2020] [Indexed: 01/22/2023]
Abstract
BACKGROUND AND PURPOSE The objective of this study was to investigate the association between body mass index (BMI) and both initial stroke severity at presentation and functional outcomes after acute ischaemic stroke (AIS) in patients with non-valvular atrial fibrillation (NVAF). METHODS Patients were categorized on the basis of their BMI into underweight (BMI <18.5, n = 111), normal (18.5 ≤ BMI <25, n = 1036) and overweight to obese (BMI ≥25, n = 472) groups. Initial stroke severity was assessed using the National Institutes of Health Stroke Scale (NIHSS) score and functional outcomes were assessed using the modified Rankin Scale score at discharge. The differences in stroke severity and functional outcomes were compared between groups using robust log-linear regression with a Poisson distribution and binary logistic regression analysis. RESULTS A total of 1619 AIS patients with NVAF from six hospitals were included. Compared with the NIHSS scores [median 5, interquartile range (IQR) 2-14] of normal-weight patients, the NIHSS scores (median 9, IQR 4-19) of underweight patients were more likely to be higher, whereas those of overweight to obese patients were lower (median 4, IQR 1-12) (P < 0.001). In terms of functional outcomes after stroke, underweight patients had a higher risk of poor functional outcomes (odds ratio 1.78, 95% confidence interval 1.09-2.56, P = 0.01) but overweight to obese patients had no significant difference in functional outcomes compared with normal-weight patients. CONCLUSION An inverse association was found between BMI and stroke severity in AIS patients with NVAF. This suggests the presence of an obesity paradox for short-term outcomes in patients with NVAF.
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Affiliation(s)
- B-H Cho
- Department of Neurology, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea.,Department of Neurology, Gangnam Severance Hospital, Severance Institute for Vascular and Metabolic Research, Yonsei University College of Medicine, Seoul, Korea
| | - K Cheon
- Department of Neurology, Gangnam Severance Hospital, Severance Institute for Vascular and Metabolic Research, Yonsei University College of Medicine, Seoul, Korea
| | - K-Y Lee
- Department of Neurology, Gangnam Severance Hospital, Severance Institute for Vascular and Metabolic Research, Yonsei University College of Medicine, Seoul, Korea
| | - Y H Jung
- Department of Neurology, Gangnam Severance Hospital, Severance Institute for Vascular and Metabolic Research, Yonsei University College of Medicine, Seoul, Korea.,Department of Neurology, Changwon Fatima Hospital, Changwon, Korea
| | - S W Han
- Department of Neurology, Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - J H Park
- Department of Neurology, Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - H-Y Choi
- Department of Neurology, Kyung Hee University School of Medicine, Kyung Hee University Hospital, Gangdong, Seoul, Korea
| | - H-J Cho
- Department of Neurology, Pusan National University Hospital, Pusan National University College of Medicine and Biomedical Research Institute, Busan, Korea
| | - H J Park
- Department of Neurology, Yonsei University College of Medicine, Seoul, Korea.,Department of Neurology, Brain Research Institute, Keimyung University School of Medicine, Daegu, Korea
| | - H S Nam
- Department of Neurology, Yonsei University College of Medicine, Seoul, Korea
| | - J H Heo
- Department of Neurology, Yonsei University College of Medicine, Seoul, Korea
| | - H S Lee
- Biostatistics Collaboration Unit, Yonsei University College of Medicine, Seoul, Korea
| | - S Kim
- Biostatistics Collaboration Unit, Yonsei University College of Medicine, Seoul, Korea
| | - Y D Kim
- Department of Neurology, Yonsei University College of Medicine, Seoul, Korea
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Ha J, Cho YS, Kim SJ, Cho SH, Kim JP, Jung YH, Jang H, Shin H, Lin FR, Na DL, Seo SW, Moon IJ, Kim HJ. Hearing loss is associated with cortical thinning in cognitively normal older adults. Eur J Neurol 2020; 27:1003-1009. [DOI: 10.1111/ene.14195] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 02/27/2020] [Indexed: 11/30/2022]
Affiliation(s)
- J. Ha
- Department of Neurology Samsung Medical Center Sungkyunkwan University School of Medicine Seoul Korea
- Samsung Alzheimer Research Center Samsung Medical Center Seoul Korea
- Neuroscience Center Samsung Medical Center Seoul Korea
| | - Y. S. Cho
- Department of Otolaryngology – Head and Neck Surgery Samsung Medical Center Sungkyunkwan University School of Medicine Seoul Korea
| | - S. J. Kim
- Department of Neurology Samsung Medical Center Sungkyunkwan University School of Medicine Seoul Korea
- Samsung Alzheimer Research Center Samsung Medical Center Seoul Korea
- Neuroscience Center Samsung Medical Center Seoul Korea
- Department of Neurology Gyeongsang National University School of Medicine and Gyeongsang National University Changwon Hospital ChangwonKorea
| | - S. H. Cho
- Department of Neurology Samsung Medical Center Sungkyunkwan University School of Medicine Seoul Korea
- Samsung Alzheimer Research Center Samsung Medical Center Seoul Korea
- Neuroscience Center Samsung Medical Center Seoul Korea
- Department of Neurology Chonnam National University Hospital Chonnam National University Medical School Gwangju Korea
| | - J. P. Kim
- Department of Neurology Samsung Medical Center Sungkyunkwan University School of Medicine Seoul Korea
- Samsung Alzheimer Research Center Samsung Medical Center Seoul Korea
- Neuroscience Center Samsung Medical Center Seoul Korea
| | - Y. H. Jung
- Department of Neurology Samsung Medical Center Sungkyunkwan University School of Medicine Seoul Korea
- Samsung Alzheimer Research Center Samsung Medical Center Seoul Korea
- Neuroscience Center Samsung Medical Center Seoul Korea
- Department of Neurology Myongji Hospital Hanyang University GoyangKorea
| | - H. Jang
- Department of Neurology Samsung Medical Center Sungkyunkwan University School of Medicine Seoul Korea
- Samsung Alzheimer Research Center Samsung Medical Center Seoul Korea
- Neuroscience Center Samsung Medical Center Seoul Korea
| | - H.‐Y. Shin
- Center for Health Promotion Samsung Medical Center Sungkyunkwan University School of Medicine Seoul Korea
| | - F. R. Lin
- Departments of Otolaryngology, Medicine, Mental Health, and Epidemiology Johns Hopkins University Baltimore MD USA
| | - D. L. Na
- Department of Neurology Samsung Medical Center Sungkyunkwan University School of Medicine Seoul Korea
- Samsung Alzheimer Research Center Samsung Medical Center Seoul Korea
- Neuroscience Center Samsung Medical Center Seoul Korea
- Department of Health Sciences and Technology SAIHST Sungkyunkwan University SeoulKorea
- Stem cell & Regenerative Medicine Institute Samsung Medical Center SeoulKorea
| | - S. W. Seo
- Department of Neurology Samsung Medical Center Sungkyunkwan University School of Medicine Seoul Korea
- Samsung Alzheimer Research Center Samsung Medical Center Seoul Korea
- Neuroscience Center Samsung Medical Center Seoul Korea
- Department of Clinical Research Design & Evaluation SAIHST Sungkyunkwan University SeoulKorea
| | - I. J. Moon
- Department of Otolaryngology – Head and Neck Surgery Samsung Medical Center Sungkyunkwan University School of Medicine Seoul Korea
| | - H. J. Kim
- Department of Neurology Samsung Medical Center Sungkyunkwan University School of Medicine Seoul Korea
- Samsung Alzheimer Research Center Samsung Medical Center Seoul Korea
- Neuroscience Center Samsung Medical Center Seoul Korea
- Department of Health Sciences and Technology SAIHST Sungkyunkwan University SeoulKorea
- Department of Digital Health SAIHST Sungkyunkwan University Seoul Korea
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Kwak GY, Choi YS, Jung YH, Chung KS, Bak JG, Lee SG. Direct Measurement of a Plasma Flow Velocity Using a Mach Probe in Hanbit Magnetic Mirror Device. Fusion Science and Technology 2018. [DOI: 10.13182/fst03-a11963613] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- G. Y. Kwak
- Department of Nuclear Engineering, Hanyang University, Seoul
| | - Y. S. Choi
- Department of Nuclear Engineering, Hanyang University, Seoul
| | - Y. H. Jung
- Department of Nuclear Engineering, Hanyang University, Seoul
| | - K.-S. Chung
- Department of Nuclear Engineering, Hanyang University, Seoul
| | - J. G. Bak
- Korea Basic Science Institute, Yusung, Taejeon 305-333, Korea
| | - S. G. Lee
- Korea Basic Science Institute, Yusung, Taejeon 305-333, Korea
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Kim WJ, Kang H, Yang SY, Shin HY, Baek CW, Jung YH, Woo YC, In JY. Effective Dose of Remifentanil for Control of Haemodynamic Response to Insertion of the Streamlined Liner of the Pharyngeal Airway. HONG KONG J EMERG ME 2017. [DOI: 10.1177/102490791302000404] [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: 11/16/2022] Open
Abstract
Objective To determine the dose of remifentanil needed to achieve successful insertion of the Streamlined Liner of the Pharyngeal Airway (SLIPA™) without the development of hypertension in 95% of the patients. Design Randomised controlled trial. Setting operating theatre of a university hospital Methods A total of 100 ASA I or II patients requiring SLIPA insertion were randomly assigned to receive normal saline (Group C) or one of the four different doses (0.5 µg/kg [Group R0.5], 1.0 µg/kg [Group R1], 1.5 µg/kg [Group R1.5] or 2.0 µg/kg [Group R2]) of remifentanil. Arterial blood pressure and heart rate were recorded at preanesthetic baseline, preinserton, and every one minute during the initial 3 minutes period after insertion. Results A Probit model of remifentanil concentration was predictive of successful insertion of SLIPA without the development of hypertension. The ED95 of remifentanil needed to suppress haemodynamic response from SLIPA insertion was 1.39 µg/kg (95% confidence interval, 1.06-2.61 µg/kg). Conclusions A single administration of remifentanil can effectively suppress haemodynamic changes due to the insertion of SLIPA.
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Affiliation(s)
| | | | | | | | | | | | | | - JY In
- Dongguk University College of Medicine, Department of Anesthesiology and Pain Medicine, Ilsan Hospital, 814, Siksa-dong, Ilsan-gu, Goyang 411-773, Korea
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Ahn EJ, Kang H, Choi GJ, Yang SY, Shin HY, Baek CW, Jung YH, Woo YC, Han SS. Streamlined Liner of the Pharynx Airway: Randomised Comparison of Size Selection Strategies with Regard to Patient Height versus Thyroid Cartilage Width. HONG KONG J EMERG ME 2017. [DOI: 10.1177/102490791502200507] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Introduction Streamlined Liner of the Pharynx Airway (SLIPA) is a disposable supraglottic airway. There are two strategies to select the size of SLIPA: by height and width of thyroid cartilage. This study compared the utility of the two strategies in selecting the optimal size. Methods One hundred forty-two patients were randomly divided into two groups with size selection by height (H) and the maximal width of the thyroid cartilage (T). The SLIPA size was selected by height in group H, and by the width of thyroid cartilage in group T. After inserting SLIPA, the investigator made note of the oropharyngeal leakage pressure (OLP) and the degree of insertion difficulty. We set the OLP as a primary outcome. In cases of an OLP <15 cmH2O, the investigator manipulated the apparatus to try to reposition it. If air still leaked, another attempt was made using a SLIPA one size larger until an OLP >15 cmH2O was achieved in up to three attempts. After insertion, the investigator measured the inspiratory and expiratory tidal volume. Post-operatively, the presence of blood or regurgitated fluid on the device was evaluated. Results OLP for group T was higher than that of group H (p=0.009). The need for manipulation and the leak fraction was higher in group H than in group T (p=0.008 and 0.034, respectively). The degree of insertion difficulty, number of trials and incidence of blood and regurgitated fluid on the device were similar between the two groups. Conclusions Both the width and height of thyroid cartilage can be used for selecting the optimal SLIPA size. (Hong Kong j.emerg.med. 2015;22:303-311)
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Affiliation(s)
| | | | | | | | | | | | | | | | - SS Han
- Chung-Ang University, College of Medicine, Department of Obstetrics and Gynecology, Seoul, Korea
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Lee OH, Choi GJ, Kang H, Baek CW, Jung YH, Woo YC, Oh J, Park YH. Effects of sugammadex vs. pyridostigmine-glycopyrrolate on post-operative nausea and vomiting: propensity score matching. Acta Anaesthesiol Scand 2017; 61:39-45. [PMID: 27696339 DOI: 10.1111/aas.12813] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 09/07/2016] [Accepted: 09/09/2016] [Indexed: 11/29/2022]
Abstract
BACKGROUND Sugammadex is a new agent that reverses neuromuscular blockade by aminosteroid neuromuscular blocker. This retrospective study compared the effects of sugammadex on post-operative nausea and vomiting (PONV) with those of a pyridostigmine-glycopyrrolate mixture. METHODS We reviewed the electronic medical records of 7179 patients who had received fentanyl-based, intravenous, patient-controlled analgesia (IV-PCA) at Chung-Ang University Hospital between January 1, 2010 and December 31, 2015. We categorized the patients into two groups on the basis of the type of reversal agent to neuromuscular blockade that was used: a traditional reversal agent (pyridostigmine-glycopyrrolate mixture; Group R; n = 7059) and sugammadex (Group S; n = 120). The propensity score matching method was then used to select 408 subjects in Group R and 115 subjects in Group S; on the basis of their covariates, these subjects were then matched with a counterpart in the other group. RESULTS After propensity score matching, the two groups were well balanced with respect to all baseline covariates. In Group S, the numeric rating scale of nausea on day 0, as well as the number of patients who vomited on day 0, was lower than that in group R. Furthermore, Group S used fewer rescue antiemetics on day 0 and had a higher complete response on day 0. CONCLUSION Sugammadex might be more beneficial for PONV compared to pyridostigmine-glycopyrrolate mixture for patients who have received opioid-based IV-PCA.
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Affiliation(s)
- O. H. Lee
- Department of Anesthesiology and Pain Medicine; Chung-Ang University College of Medicine; Dongjak-gu Seoul Korea
| | - G. J. Choi
- Department of Anesthesiology and Pain Medicine; Chung-Ang University College of Medicine; Dongjak-gu Seoul Korea
| | - H. Kang
- Department of Anesthesiology and Pain Medicine; Chung-Ang University College of Medicine; Dongjak-gu Seoul Korea
| | - C. W. Baek
- Department of Anesthesiology and Pain Medicine; Chung-Ang University College of Medicine; Dongjak-gu Seoul Korea
| | - Y. H. Jung
- Department of Anesthesiology and Pain Medicine; Chung-Ang University College of Medicine; Dongjak-gu Seoul Korea
| | - Y. C. Woo
- Department of Anesthesiology and Pain Medicine; Chung-Ang University College of Medicine; Dongjak-gu Seoul Korea
| | - J. Oh
- Department of Anesthesiology and Pain Medicine; Chung-Ang University College of Medicine; Dongjak-gu Seoul Korea
| | - Y. H. Park
- Department of Anesthesiology and Pain Medicine; Chung-Ang University College of Medicine; Dongjak-gu Seoul Korea
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Lee E, Lee SH, Kwon JW, Kim YH, Cho HJ, Yang SI, Jung YH, Kim HY, Seo JH, Kim BJ, Kim HB, Lee SY, Kwon HJ, Hong SJ. Atopic dermatitis phenotype with early onset and high serum IL-13 is linked to the new development of bronchial hyperresponsiveness in school children. Allergy 2016; 71:692-700. [PMID: 26797819 DOI: 10.1111/all.12844] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/15/2016] [Indexed: 02/04/2023]
Abstract
BACKGROUND Atopic dermatitis (AD) is characterized by a heterogeneous clinical spectrum, and some forms of AD are associated with the initial steps of allergic march. The aims of this study were to determine AD phenotypes in school-age children and investigate their associations with the allergic march in each cluster. METHODS We included 242 children (6-8 years) with current AD from the Children's HEalth and Environmental Research study, a 4-year prospective follow-up study with 2-year survey intervals. Latent class analysis was used. Serum IL-13 and thymic stromal lymphopoietin (TSLP) levels at the time of enrollment were measured using ELISA. RESULTS We identified four current AD phenotypes in children, characterized as 'early onset with low atopy' (26.4% of the sample; group 1), 'early onset with high atopy and high eosinophil percentages' (48.3%; group 2), 'late onset with low atopy' (9.9%; group 3), and 'late onset with high atopy and normal eosinophils' (15.3%; group 4). Although groups 2 and 4 demonstrated high atopic burden, children in group 2 showed the persistence of AD and eosinophilia associated with a high prevalence of new cases of bronchial hyper-responsiveness and asthma symptoms during follow-up. The serum IL-13 level was significantly increased in the early-onset AD groups, but there was no significant difference in the serum TSLP levels across all four groups. CONCLUSION An allergic march-associated AD phenotype exists that is characterized by early onset of AD with its persistence, increased serum IL-13 levels, high atopy, and a persistently increased blood eosinophil percentage.
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Affiliation(s)
- E. Lee
- Department of Pediatrics; Childhood Asthma and Atopy Center; Environmental Health Center; Asan Medical Center; University of Ulsan College of Medicine; Seoul Korea
| | - S. H. Lee
- Asan Institute for Life Sciences; University of Ulsan College of Medicine; Seoul Korea
| | - J. W. Kwon
- Department of Pediatrics; Seoul National University Bundang Hospital; Seongnam Korea
| | - Y. H. Kim
- Department of Pediatrics; Childhood Asthma and Atopy Center; Environmental Health Center; Asan Medical Center; University of Ulsan College of Medicine; Seoul Korea
| | - H. J. Cho
- Department of Pediatrics; Childhood Asthma and Atopy Center; Environmental Health Center; Asan Medical Center; University of Ulsan College of Medicine; Seoul Korea
| | - S. I. Yang
- Department of Pediatrics; Hallym University Sacred Heart Hospital; Anyang Korea
| | - Y. H. Jung
- Department of Pediatrics; CHA University School of Medicine; Seongnam Korea
| | - H. Y. Kim
- Department of Pediatrics; Pusan National University Yangsan Hospital; Yangsan Seoul Korea
| | - J. H. Seo
- Department of Pediatrics; Korea Cancer Center Hospital; Seoul Korea
| | - B. J. Kim
- Department of Environmental Health; University of Cincinnati College of Medicine; Cincinnati OH USA
| | - H. B. Kim
- Department of Pediatrics; Sanggye Paik Hospital; Inje University College of Medicine; Seoul Korea
| | - S. Y. Lee
- Department of Pediatrics; Hallym University Sacred Heart Hospital; Anyang Korea
| | - H. J. Kwon
- Department of Preventive Medicine; Dankook University College of Medicine; Cheonan Korea
| | - S. J. Hong
- Department of Pediatrics; Childhood Asthma and Atopy Center; Environmental Health Center; Asan Medical Center; University of Ulsan College of Medicine; Seoul Korea
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Jung YH, Jang JH, Kang H, Choi WS, Choi YK, Song WC, Song BS, Lee JH, Hong B. Properties of Dye-Sensitized Solar Cells Using Carbon Nanowall Counter Electrodes. J Nanosci Nanotechnol 2016; 16:5302-5304. [PMID: 27483920 DOI: 10.1166/jnn.2016.12215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This research investigates plasma-treated and metal-coated carbon nanowalls (CNWs) for use as counter electrodes of dye-sensitized solar cells (DSSCs). The CNWs were synthesized on a fluorine-tin-oxide (FTO) glass substrate using the microwave plasma-enhanced chemical vapor deposition (PECVD) system with methane (CH4) gas. The post-plasma treatment was performed on the CNWs with hydrogen (H2) plasma using PECVD, and the CNWs were sputter-coated with metal films using the RF magnetron sputtering system with a four-inch tungsten (W) target. Then the post-plasma-treated and metal-coated CNWs were used as counter electrodes for the fabrication of the DSSCs. Field-emission scanning electron microscopy (FE-SEM) was performed to obtain cross-sectional and planar images of the grown CNWs. The energy conversion efficiencies of the DSSCs manufactured using the post-plasma-treated and metal-layer-coated CNWs as the counter electrodes were measured.
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Lee HJ, Ryu JM, Jung YH, Lee KH, Kim DI, Han HJ. Glycerol-3-phosphate acyltransferase-1 upregulation by O-GlcNAcylation of Sp1 protects against hypoxia-induced mouse embryonic stem cell apoptosis via mTOR activation. Cell Death Dis 2016; 7:e2158. [PMID: 27010859 PMCID: PMC4823928 DOI: 10.1038/cddis.2015.410] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Revised: 12/10/2015] [Accepted: 12/14/2015] [Indexed: 12/20/2022]
Abstract
Oxygen signaling is critical for stem cell regulation, and oxidative stress-induced stem cell apoptosis decreases the efficiency of stem cell therapy. Hypoxia activates O-linked β-N-acetyl glucosaminylation (O-GlcNAcylation) of stem cells, which contributes to regulation of cellular metabolism, as well as cell fate. Our study investigated the role of O-GlcNAcylation via glucosamine in the protection of hypoxia-induced apoptosis of mouse embryonic stem cells (mESCs). Hypoxia increased mESCs apoptosis in a time-dependent manner. Moreover, hypoxia also slightly increased the O-GlcNAc level. Glucosamine treatment further enhanced the O-GlcNAc level and prevented hypoxia-induced mESC apoptosis, which was suppressed by O-GlcNAc transferase inhibitors. In addition, hypoxia regulated several lipid metabolic enzymes, whereas glucosamine increased expression of glycerol-3-phosphate acyltransferase-1 (GPAT1), a lipid metabolic enzyme producing lysophosphatidic acid (LPA). In addition, glucosamine-increased O-GlcNAcylation of Sp1, which subsequently leads to Sp1 nuclear translocation and GPAT1 expression. Silencing of GPAT1 by gpat1 siRNA transfection reduced glucosamine-mediated anti-apoptosis in mESCs and reduced mammalian target of rapamycin (mTOR) phosphorylation. Indeed, LPA prevented mESCs from undergoing hypoxia-induced apoptosis and increased phosphorylation of mTOR and its substrates (S6K1 and 4EBP1). Moreover, mTOR inactivation by rapamycin (mTOR inhibitor) increased pro-apoptotic proteins expressions and mESC apoptosis. Furthermore, transplantation of non-targeting siRNA and glucosamine-treated mESCs increased cell survival and inhibited flap necrosis in mouse skin flap model. Conversely, silencing of GPAT1 expression reversed those glucosamine effects. In conclusion, enhancing O-GlcNAcylation of Sp1 by glucosamine stimulates GPAT1 expression, which leads to inhibition of hypoxia-induced mESC apoptosis via mTOR activation.
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Affiliation(s)
- H J Lee
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science and BK21 Creative Veterinary Research Center, Seoul National University, Seoul, Korea
| | - J M Ryu
- Department of Veterinary Physiology, College of Veterinary Medicine, Chonnam National University, Gwangju 61186, Korea
| | - Y H Jung
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science and BK21 Creative Veterinary Research Center, Seoul National University, Seoul, Korea
| | - K H Lee
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science and BK21 Creative Veterinary Research Center, Seoul National University, Seoul, Korea
| | - D I Kim
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science and BK21 Creative Veterinary Research Center, Seoul National University, Seoul, Korea
| | - H J Han
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science and BK21 Creative Veterinary Research Center, Seoul National University, Seoul, Korea
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Oh SY, Lee SJ, Jung YH, Lee HJ, Han HJ. Arachidonic acid promotes skin wound healing through induction of human MSC migration by MT3-MMP-mediated fibronectin degradation. Cell Death Dis 2015; 6:e1750. [PMID: 25950480 PMCID: PMC4669694 DOI: 10.1038/cddis.2015.114] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Revised: 03/09/2015] [Accepted: 03/23/2015] [Indexed: 12/17/2022]
Abstract
Arachidonic acid (AA) is largely released during injury, but it has not been fully studied yet how AA modulates wound repair with stem cells. Therefore, we investigated skin wound-healing effect of AA-stimulated human umbilical cord blood-derived mesenchymal stem cells (hUCB-MSCs) in vivo and its molecular mechanism in vitro. We found that transplantation of hUCB-MSCs pre-treated with AA enhanced wound filling, re-epithelization, and angiogenesis in a mouse skin excisional wound model. AA significantly promoted hUCB-MSCs migration after a 24 h incubation, which was inhibited by the knockdown of G-protein-coupled receptor 40 (GPR40). AA activated mammalian target of rapamycin complex 2 (mTORC2) and Aktser473 through the GPR40/phosphoinositide 3-kinase (PI3K) signaling, which was responsible for the stimulation of an atypical protein kinase C (PKC) isoform, PKCζ. Subsequently, AA stimulated phosphorylation of p38 MAPK and transcription factor Sp1, and induced membrane type 3-matrix metalloproteinase (MT3-MMP)-dependent fibronectin degradation in promoting hUCB-MSCs motility. Finally, the silencing of MT3-MMP in AA-stimulated hUCB-MSCs failed to promote the repair of skin wounds owing to impaired cell motility. In conclusion, AA enhances skin wound healing through induction of hUCB-MSCs motility by MT3-MMP-mediated fibronectin degradation, which relies on GPR40-dependent mTORC2 signaling pathways.
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Affiliation(s)
- S Y Oh
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science, and BK21 PLUS Creative Veterinary Research Center, Seoul National University, Seoul, 151-741, Korea
| | - S-J Lee
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science, and BK21 PLUS Creative Veterinary Research Center, Seoul National University, Seoul, 151-741, Korea
| | - Y H Jung
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science, and BK21 PLUS Creative Veterinary Research Center, Seoul National University, Seoul, 151-741, Korea
| | - H J Lee
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science, and BK21 PLUS Creative Veterinary Research Center, Seoul National University, Seoul, 151-741, Korea
| | - H J Han
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science, and BK21 PLUS Creative Veterinary Research Center, Seoul National University, Seoul, 151-741, Korea
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Choi GJ, Kang H, Baek CW, Jung YH, Woo YC, Kim SH, Kim JG. Comparison of streamlined liner of the pharynx airway (SLIPA ™) and laryngeal mask airway: a systematic review and meta-analysis. Anaesthesia 2015; 70:613-22. [PMID: 25693455 DOI: 10.1111/anae.13035] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/13/2015] [Indexed: 11/29/2022]
Abstract
We performed a systematic review to compare the efficacy and safety of the streamlined liner of the pharynx airway and laryngeal mask airway used in adults during general anaesthesia. We included 14 studies with studies with 1273 patients in total. There was no evidence of a difference between the two devices in insertion success rate on the first attempt (13 studies, 1143 patients), insertion time (seven studies, 576 patients), ease of insertion (five studies, 466 patients), oropharyngeal leak pressure (eight studies, 771 patients) and the quality of the fibreoptic view of the larynx through the device (three studies, 281 patients). The relative risk (95% CI) of bloodstaining of the device (nine studies, 859 patients) was 2.09 (1.46-3.00) for the streamlined liner of the pharynx airway compared with the laryngeal mask airway. Other adverse events were comparable. Subgroup analysis suggested that the insertion by novice users might be faster and more successful with the streamlined liner of the pharynx airway than the laryngeal mask airway; however, this was from only two studies and 186 patients. The method of size selection of the streamlined liner of the pharynx airway device might also affect the speed of insertion: choosing according to the width of the patient's thyroid cartilage, rather than height, may produce better results.
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Affiliation(s)
- G J Choi
- Department of Anaesthesiology and Pain Medicine, Chung-Ang University College of Medicine, Seoul, Korea
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Choi GJ, Kang H, Baek CW, Jung YH, Woo YC, Cha YJ. A systematic review and meta-analysis of the i-gel®vs laryngeal mask airway in children. Anaesthesia 2014; 69:1258-65. [DOI: 10.1111/anae.12746] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/19/2014] [Indexed: 11/27/2022]
Affiliation(s)
- G. J. Choi
- Department of Anaesthesiology and Pain Medicine; Chung-Ang University College of Medicine; Seoul Korea
| | - H. Kang
- Department of Anaesthesiology and Pain Medicine; Chung-Ang University College of Medicine; Seoul Korea
- Medical Device Clinical Trials Centre; Chung-Ang University College of Medicine; Seoul Korea
| | - C. W. Baek
- Department of Anaesthesiology and Pain Medicine; Chung-Ang University College of Medicine; Seoul Korea
| | - Y. H. Jung
- Department of Anaesthesiology and Pain Medicine; Chung-Ang University College of Medicine; Seoul Korea
| | - Y. C. Woo
- Department of Anaesthesiology and Pain Medicine; Chung-Ang University College of Medicine; Seoul Korea
| | - Y. J. Cha
- Department of Laboratory Medicine; Chung-Ang University College of Medicine; Seoul Korea
- Medical Device Clinical Trials Centre; Chung-Ang University College of Medicine; Seoul Korea
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Yun SP, Lee SJ, Jung YH, Han HJ. Galectin-1 stimulates motility of human umbilical cord blood-derived mesenchymal stem cells by downregulation of smad2/3-dependent collagen 3/5 and upregulation of NF-κB-dependent fibronectin/laminin 5 expression. Cell Death Dis 2014; 5:e1049. [PMID: 24503541 PMCID: PMC3944255 DOI: 10.1038/cddis.2014.3] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Revised: 12/19/2013] [Accepted: 12/23/2013] [Indexed: 01/23/2023]
Abstract
Galectin-1 (Gal-1) belongs to a family of endogenous lectins with conserved carbohydrate recognition domains binding β-galactosidase sugars and plays a vital role in regulating stem cell functions including determination of cell fate. However, our understanding of the functional roles of Gal-1 in human umbilical cord blood-derived mesenchymal stem cells (UCB-MSCs) is still fragmentary and incomplete. Gal-1 significantly increased motility after a 24-h incubation, and this effect was inhibited by β-lactose. We analyzed 17 extracellular matrix (ECM) genes in UCB-MSCs. Gal-1 decreased the expression of collagen genes COL3A1 (COL-3) and COL5A1 (COL-5) but increased the expression of fibronectin (FN) and laminin 5 (LM-5), that were reversed by β-lactose. Gal-1 increased protein kinase C (PKC), c-Src, and caveolin-1 (Cav-1) phosphorylation that was attenuated by β-lactose and the Src inhibitor PP2. In addition, pretreatment with the lipid raft disruptor Mβ-CD and the PKC inhibitors inhibited Gal-1-induced UCB-MSC motility. In addition, Gal-1 reduced smad2/3 phosphorylation and induced nuclear factor (NF)-κB phosphorylation. Pretreatment with Mβ-CD attenuated Gal-1-reduced smad2/3 phosphorylation, COL-3, and COL-5 expression but did not affect NF-κB phosphorylation, FN, or LM-5 expression. In contrast, PKC inhibitors only attenuated NF-κB phosphorylation, FN, and LM-5 expression. Reconstructing Gal-1-induced genetic changes by replacing it with siRNA specific for COL-3 or COL-5, or treatment of the cells with FN and LM-5 proteins, increased motility and its related proteins such as focal adhesion kinase, Akt, Erk, integrins, and matrix metalloproteinase-2. A combined treatment with COL-3/COL-5 siRNA or FN/LM-5 compared with that of single treatments was synergistic. However, a single Gal-1 treatment maximally stimulated motility and related protein phosphorylation/expression. These results demonstrate that Gal-1 stimulated human UCB-MSC motility by decreasing COL-3/COL-5 expression and increasing FN/LM-5 expression through a PKC-dependent NF-κB and c-Src/Cav-1-dependent smad2/3 pathway that was critical for governing the activation of FAK, Akt, Erk, integrins, and MMP2.
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Affiliation(s)
- S P Yun
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
- BK21 PLUS Creative Veterinary Research Center, Seoul National University, Seoul, Korea
| | - S-J Lee
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
- BK21 PLUS Creative Veterinary Research Center, Seoul National University, Seoul, Korea
| | - Y H Jung
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
- BK21 PLUS Creative Veterinary Research Center, Seoul National University, Seoul, Korea
| | - H J Han
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
- BK21 PLUS Creative Veterinary Research Center, Seoul National University, Seoul, Korea
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You HJ, Jang SO, Choo WI, Jung YH, Lho TH, Yoo SJ. Development status of the 18 GHz superconducting electron cyclotron resonance ion source at National Fusion Research Institute. Rev Sci Instrum 2014; 85:02A916. [PMID: 24593495 DOI: 10.1063/1.4827307] [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: 06/03/2023]
Abstract
A new superconducting 18 GHz electron cyclotron resonance ion source is being developed at the National Fusion Research Institute in South Korea. This source will be dedicated for future application of highly charged ions in the area of matter interaction, diagnostic imaging, and probing. In this paper, we describe the status of the source development consisting of a double electrode biased disk, sputtering systems for metal ion production, diagnostic ports for the extraction region, a variable gap extraction-Einzel lens system, and a low energy beam transport system.
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Affiliation(s)
- H J You
- Plasma Technology Research Center, National Fusion Research Institute, Gunsan, South Korea
| | - S O Jang
- Plasma Technology Research Center, National Fusion Research Institute, Gunsan, South Korea
| | - W I Choo
- Plasma Technology Research Center, National Fusion Research Institute, Gunsan, South Korea
| | - Y H Jung
- Plasma Technology Research Center, National Fusion Research Institute, Gunsan, South Korea
| | - T H Lho
- Plasma Technology Research Center, National Fusion Research Institute, Gunsan, South Korea
| | - S J Yoo
- Plasma Technology Research Center, National Fusion Research Institute, Gunsan, South Korea
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Kim BJ, Seo JH, Jung YH, Kim HY, Kwon JW, Kim HB, Lee SY, Park KS, Yu J, Kim HC, Leem JH, Lee JY, Sakong J, Kim SY, Lee CG, Kang DM, Ha M, Hong YC, Kwon HJ, Hong SJ. Air pollution interacts with past episodes of bronchiolitis in the development of asthma. Allergy 2013; 68:517-23. [PMID: 23347096 DOI: 10.1111/all.12104] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/30/2012] [Indexed: 11/29/2022]
Abstract
BACKGROUND Exposure to ambient air pollution and bronchiolitis are risk factors for asthma. The aim of this study was to investigate the effect of air pollution on the development of asthma in children with past episodes of bronchiolitis. METHODS A prospective 2-year follow-up survey consisting of parental responses to the International Study of Asthma and Allergies in Childhood (ISAAC) questionnaire, and allergy evaluations were conducted in 1743 children with a mean age of 6.8 years. Recent 5-year exposure to air pollution was estimated using a geographic information system. RESULTS Higher exposure to ozone was associated with airway hyper-responsiveness (PC20 ≤ 16 mg/ml) at enrollment (odds ratio [OR] = 1.60, 95% CI [confidence interval] = 1.13-2.27) and with new episodes of wheezing during the 2-year period (OR = 1.92, 95% CI = 0.96-3.83). Past episodes of bronchiolitis were associated with both current wheezing and physician-diagnosed asthma. When the two factors were combined, the prevalence of bronchial hyper-reactivity (OR = 2.96, 95% CI = 1.41-6.24) and new wheezing (OR = 4.17, 95% CI = 0.89-19.66) as well as current wheezing and physician-diagnosed asthma was even greater (P for trend <0.05 for all). In children with both risk factors, lung function was significantly decreased, with atopic children being particularly vulnerable. CONCLUSION In children, the interaction between air pollution and past episodes of bronchiolitis resulted in a greater prevalence of asthma and pointed to an association with bronchial hyper-reactivity and decreased lung function. These results suggest mechanisms underlying the development of asthma.
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Affiliation(s)
- B. J. Kim
- Department of Pediatrics; Inje University Haeundae Paik Hospital; Busan; Korea
| | - J. H. Seo
- Department of Pediatrics; Korea Institute of Radiologic & Medical Science; Seoul; Korea
| | - Y. H. Jung
- Department of Pediatrics; Asan Medical Center; College of Medicine; University of Ulsan; Seoul; Korea
| | - H. Y. Kim
- Department of Pediatrics; Asan Medical Center; College of Medicine; University of Ulsan; Seoul; Korea
| | - J. W. Kwon
- Department of Pediatrics; Seoul National University Bundang Hospital; Seongnam; Korea
| | - H. B. Kim
- Department of Pediatrics; Inje University Sangge Paik Hospital; Seoul; Korea
| | - S. Y. Lee
- Department of Pediatrics; Sacred Heart Hospital; College of Medicine; Hallym University; Bucheon; Korea
| | - K. S. Park
- Department of Pediatrics; Presbyterian Medical Center; Jeonju; Korea
| | - J. Yu
- Department of Pediatrics; Asan Medical Center; College of Medicine; University of Ulsan; Seoul; Korea
| | - H. C. Kim
- Department of Occupational & Environmental Medicine; Inha University Hospital, Incheon; Incheon; Korea
| | - J. H. Leem
- Department of Occupational & Environmental Medicine; Inha University Hospital, Incheon; Incheon; Korea
| | - J. Y. Lee
- Department of Social and Preventive Medicine; College of Medicine; Inha University; Incheon; Korea
| | - J. Sakong
- Department of Preventive Medicine; College of Medicine; Yeungnam University; Daegu; Korea
| | - S. Y. Kim
- Department of Preventive Medicine; College of Medicine; Jeju National University; Jeju; Korea
| | - C. G. Lee
- Department of Occupational & Environmental Medicine; Chosun University Hospital; Gwangju; Korea
| | - D. M. Kang
- Department of Occupational & Environmental Medicine; Pusan National University Yangsan Hospital; Yangsan; Korea
| | - M. Ha
- Department of Preventive Medicine; College of Medicine; Dankook University; Cheonan; Korea
| | - Y. C. Hong
- Department of Preventive Medicine; College of Medicine; Seoul National University; Seoul; Korea
| | - H. J. Kwon
- Department of Preventive Medicine; College of Medicine; Dankook University; Cheonan; Korea
| | - S. J. Hong
- Department of Pediatrics; Asan Medical Center; College of Medicine; University of Ulsan; Seoul; Korea
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Jung YH, Liang H, Benson BW, Flint DJ, Cho BH. The assessment of impacted maxillary canine position with panoramic radiography and cone beam CT. Dentomaxillofac Radiol 2011; 41:356-60. [PMID: 22116130 DOI: 10.1259/dmfr/14055036] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE The aim of this study was to correlate the position of impacted maxillary canines on panoramic radiography with cone beam CT (CBCT) and analyse the labiopalatal position of canines and root resorption of permanent incisors in CBCT according to the mesiodistal position of canines on panoramic radiographs. METHODS This study was a retrospective radiographic review of 63 patients with 73 impacted maxillary canines. The mesiodistal position of the canine cusp tip was classified by sector location and analysed on 73 impacted canines from 63 panoramic radiographs. The labiopalatal position of the impacted canines and root resorption of permanent incisors were evaluated with CBCT. The sector location on panoramic radiographs was compared with the labiopalatal position of impacted maxillary canines on CBCT. The statistical correlation between panoramic and CBCT findings was examined using the χ(2) test and the Fisher's exact test. RESULTS Labially impacted canines in CBCT were more frequent in Panoramic Sectors 1, 2 and 3, mid-alveolus impacted canines were more frequent in Sector 4 and palatally impacted canines were more frequent in Sector 5. There was a statistically significant association between the panoramic sectors of the impacted canines and the labiopalatal position of the canines (p < 0.001). Root resorption of permanent incisors showed a significant difference according to sector location (p < 0.001) and was observed in Sectors 3, 4 and 5. CONCLUSIONS This study suggests that the labiopalatal position of impacted canines and resorption of permanent incisors might be predicted using sector location on panoramic radiography.
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Affiliation(s)
- Y H Jung
- Department of Oral and Maxillofacial Radiology, Pusan National University, Busan, Republic of Korea
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Kim YD, Lee JH, Jung YH, Cha MJ, Choi HY, Nam CM, Yang JH, Cho HJ, Nam HS, Lee KY, Heo JH. Effect of warfarin withdrawal on thrombolytic treatment in patients with ischaemic stroke. Eur J Neurol 2011; 18:1165-70. [PMID: 21314856 DOI: 10.1111/j.1468-1331.2011.03363.x] [Citation(s) in RCA: 7] [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] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND AND PURPOSE Abruptly discontinuing warfarin may induce a rebound prothrombotic state. Thrombolytic agents may also paradoxically induce prothrombotic conditions, which include platelet activation and thrombin generation. Therefore, prothrombotic states may be enhanced by withdrawing warfarin in patients under thrombolytic treatment. This study was aimed to determine whether patients with warfarin withdrawal have different clinical outcomes from those without warfarin use after thrombolytic treatment. METHODS A total of 148 consecutive patients with atrial fibrillation who were not on anticoagulants at admission and who received thrombolysis were included in this study. We compared the outcomes between a warfarin withdrawal group and a no-warfarin group. RESULTS Fourteen patients (9.5%) were included in the warfarin withdrawal group. Although baseline National Institute of Health Stroke Scale (NIHSS) scores, recanalization rates, and hemorrhage frequencies did not differ between the groups, the warfarin withdrawal group showed poorer outcomes. Increased NIHSS scores during the first 7days were more frequent in the warfarin withdrawal group (57.1% vs. 26.9%, P=0.029). The median percent improvement in NIHSS scores at 24h after thrombolysis was also lower in the warfarin withdrawal group. After adjusting for covariates, warfarin withdrawal was a strong predictor of poor functional outcome at 3months (modified Rankin score≥3) (odds ratio, 17.067, 95% CI 2.703-107.748). CONCLUSIONS Discontinuing warfarin was associated with early neurologic deterioration and poor long-term outcomes after thrombolytic treatment.
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Affiliation(s)
- Y D Kim
- Department of Neurology, Severance Hospital Integrative Research Institute for Cerebral and Cardiovascular Diseases, Yonsei University College of Medicine, Seoul, Korea
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Shin JY, Jung YH, Gupta MK, Uhm SJ, Shin ST, Han YM, Lee HT. 302 IMPRINTED microRNA ARE DIFFERENTIALLY EXPRESSED IN ADULT MOUSE TESTES-DERIVED MALE GERM-LINE STEM CELLS. Reprod Fertil Dev 2011. [DOI: 10.1071/rdv23n1ab302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Testis-derived male germ-line stem (GS) cells, the in vitro counterpart of spermatogonial stem cells, can acquire multipotency under appropriate culture conditions to become multipotent adult germ-line stem (maGS) cells, which, upon testicular transplantation, produce teratomas instead of initiating spermatogenesis. This study evaluated the DNA methylation and expression of imprinted microRNA (miRNA) in mouse GS and maGS cells. The GS and maGS cell lines were established essentially as described earlier (Jung et al. 2010 Mol. Hum. Reprod. PMID: 20610616) and were quantified for maternally (miR-296-3p, miR-296-5p, miR-483) and paternally (miR-127, miR-127-5p) imprinted miRNA by real-time TaqMan® MicroRNA assay and for DNA methylation at imprinting control regions of respective miRNA (Gnas-Nespas DMR, Igf2-H19 ICR, and Dlk1-Dio3 IG-DMR) by bisulfite genomic sequencing. Sperm and embryonic stem (ES) cells were used as controls for comparison. Results showed that, similar to sperm, expression of maternally imprinted miRNA was consistently higher (P < 0.001), whereas that of paternally imprinted miRNA was consistently lower (P < 0.001) in GS cells than in control ES cells. The DNA methylation analyses further confirmed that imprinted miRNA were androgenetic in GS cells. On the other hand, DNA methylation of maGS cells resembled that of ES cells, but the expression pattern of imprinted miRNA was intermediate between that of GS cells and ES cells. The expression of imprinted miRNA in GS and maGS cells was also altered during their in vitro differentiation but varied with both the differentiation stage and the miRNA. In conclusion, our data suggest that GS cells have androgenetic DNA methylation and expression of imprinted miRNA which changes to an ES cell-like pattern upon their conversion to maGS cells and, therefore, may serve as an epigenetic miRNA signature or molecular marker to distinguish GS cells from maGS cells.
This work was supported by a grant (Code #200901FHT010305191) from BioGreen 21 Program, RDA, Republic of Korea.
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Cho HJ, Jung YH, Kim YD, Nam HS, Kim DS, Heo JH. The different infarct patterns between adulthood-onset and childhood-onset moyamoya disease. J Neurol Neurosurg Psychiatry 2011; 82:38-40. [PMID: 20587492 DOI: 10.1136/jnnp.2009.181487] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND AND PURPOSE The pattern of infarctions based on the findings of diffusion-weighted image was assessed, and it was also investigated whether there are any age-specific differences in patients with moyamoya disease (MMD). METHODS The subjects were 66 consecutive patients with MMD who had an acute cerebral infarction. Each ischaemic lesion was categorised into one of seven patterns (gyral, atypical territorial, honeycomb, classic territorial, multiple-dot, borderzone, deep lacunar) based on diffusion-weighted image findings. The patterns were compared between adulthood-onset MMD (A-MMD, ≥20 years old, 34 patients) and childhood/adolescent-onset MMD (C-MMD, <20 years old, 32 patients) according to their ages of infarct presentation. RESULTS A total of 91 infarct patterns were observed from 66 patients. The gyral, atypical territorial, and honeycomb patterns, which are not usually seen in conventional stroke patients, were common in MMD (68.1%). Among all patterns, a gyral pattern was most common (40/91, 44.0%). Borderzone and deep lacunar patterns were infrequent. Gyral and borderzone patterns were more frequently seen in the C-MMD group, whereas a honeycomb pattern was not seen in young patients. Honeycomb pattern was more common at advanced vascular stages. Infarctions confined to the cortex were more common in the C-MMD group (26/32, 75.0%) than in A-MMD patients (14/34, 41.2%). CONCLUSIONS Moyamoya disease showed various characteristic and age-specific infarct patterns. Different infarct patterns between the A-MMD and C-MMD groups may be associated with age-specific vulnerability of the brain to ischaemia, stage of arteriopathy or changes of abnormal collateral pathways.
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Affiliation(s)
- H J Cho
- Department of Neurology, Yonsei University College of Medicine, Seoul, Korea
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Lee JH, Lee YW, Shin YS, Jung YH, Hong CS, Park JW. Exercise-induced airway obstruction in young asthmatics measured by impulse oscillometry. J Investig Allergol Clin Immunol 2010; 20:575-581. [PMID: 21313998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023] Open
Abstract
BACKGROUND Impulse oscillometry (IOS) is a good method for measuring airway resistance. It does not require special breathing skills and it can reflect different aspects of airway obstruction to those revealed by spirometry, which is an effort-dependent maneuver. OBJECTIVE To evaluate the characteristics of airway obstruction in young asthmatics after an exercise bronchial provocation test (EBPT) using IOS. METHODS Forty-seven young adults were enrolled in the study. All the participants underwent a methacholine bronchial provocation test (MBPT) and an EBPT for the evaluation of their asthma. IOS and spirometric parameters were collected at baseline and at 0, 5, 10, 20, and 30 minutes post-EBPT.The participants were divided into 2 groups according to MBPT positivity: an airway hyperresponsiveness (AHR) group and a no-AHR group. RESULTS There were differences in the percent decrease in forced expiratory volume in the first second (FEV1) between the 2 groups at 5, 10, and 20 minutes after exercise. Resistance at 5 Hz (R5) increased in the AHR group but not in the no-AHR group at 5 and 10 minutes after exercise. Integration of reactance from 5 Hz to resonance frequency (area of reactance, AX) was also increased in the AHR group at only 5 and 10 minutes post-EBPT. Delta R5 and delta AX at 5 and 10 minutes post-exercise were well correlated with the percent decrease in FEV1. CONCLUSIONS IOS parameters, especially delta R5 and delta AX, may be useful for performing objective evaluations and improving our understanding of exercise-induced airway obstruction in young asthmatics.
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Affiliation(s)
- J H Lee
- Division of Allergy and Immunology, Department of Internal Medicine, Institute of Allergy, Brain Korea 21 Project for Medical Science, Yonsei University College of Medicine, Seoul, Republic of Korea
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Kim YD, Choi HY, Jung YH, Nam CM, Yang JH, Cho HJ, Nam HS, Lee KY, Heo JH. Mirror pattern of cerebral artery atherosclerosis in patients with ischaemic stroke. Eur J Neurol 2009; 16:1159-64. [DOI: 10.1111/j.1468-1331.2009.02690.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Affiliation(s)
- H-Y Choi
- Department of Neurology, Yonsei University College of Medicine, 134 Shinchon-dong, Seodaemoon-ku, 120-752, Seoul, Korea
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Gupta MK, Uhm SJ, Kim EY, Jung YH, Yu JY, Lee HT. 402 OOCYTE-MEDIATED GENE TRANSFER: A NOVEL APPROACH TO PRODUCE TRANSGENIC PORCINE EMBRYOS. Reprod Fertil Dev 2007. [DOI: 10.1071/rdv19n1ab402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Classical approaches for producing transgenic livestock require labor-intensive, time-consuming, and expensive methods but have low transgenic efficiency and a high mosaicism rate. This study evaluated a simplified method for producing transgenic porcine embryos by microinjecting a DNA construct into unfertilized metaphase oocytes that were subsequently fertilized in vitro. For this, oocytes recovered from abattoir-derived prepubertal porcine ovaries were matured in vitro for 42–44 h and were microinjected with DNA solution (10 ng �L-1) using a femtojet microinjector (Eppendorf, Hamburg, Germany). The DNA (4.7 kb) was derived from the pEGFP-C1 plasmid (Clontech Laboratories Inc., Palo Alto, CA, USA), which contains the enhanced green fluorescent protein (EGFP) encoding transgene under the control of cytomegalovirus promoter, and linearized with ApaLI restriction enzyme. Injected oocytes were then in vitro-fertilized using fresh epididymal sperm obtained from abattoir-derived porcine testis by standard procedure and cultured in NSCU23 medium supplemented with 0.4% BSA. The efficiency of transgenesis was monitored by visualization of green florescence under UV illumination using a EGFP filter set. Data were analyzed by Student's t-test. Results showed that the cleavage rate of injected oocytes (68.7 ± 0.5%) was similar to that of non-injected control oocytes (67.8 ± 0.4%). However, a high percentage of injected oocytes showed a developmental block at the 2–4 cell stage. The EGFP expression rate at 2–4 cell stage, when expressed as proportion of injected oocyte, was 17.2 ± 0.1%. Interestingly, mosaicism was not observed. The EGFP expression rate increased to 26.7 ± 0.1% when the DNA concentration was increased to 40 ng µL−1. Injecting the DNA solution near the metaphase plate of the oocyte did not improve (P < 0.05) the EGFP expression rate (22.2 ± 0.1%). A high proportion of EGFP-expressing oocytes blocked at the 4–8 cell stage and did not progress to blastocyst, possibly due to random integration of the transgene in developmentally important gene loci. Our results thus suggest oocyte-mediated gene transfer as a promising tool for producing transgenic livestock. However, further research is required to improve its efficiency.
This work was supported by the Research Project on the Production of Bio-Organs (No. 200503030201), Ministry of Agriculture and Forestry, Republic of Korea.
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Cha JO, Lee JK, Jung YH, Yoo JI, Park YK, Kim BS, Lee YS. Molecular analysis of Staphylococcus aureus isolates associated with staphylococcal food poisoning in South Korea. J Appl Microbiol 2006; 101:864-71. [PMID: 16968298 DOI: 10.1111/j.1365-2672.2006.02957.x] [Citation(s) in RCA: 85] [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] [Indexed: 11/29/2022]
Abstract
AIMS To investigate the molecular epidemiological study of Staphylococcus aureus from staphylococcal food poisoning (SFP) incidents in South Korea. METHODS AND RESULTS Three hundred and thirty-two strains isolated from ten provinces between June 1999 and January 2002 were characterized by staphylococcal enterotoxin genes, toxic shock syndrome toxin 1 (tst) gene, and exfoliative toxin genes. Toxin genotypes were sea-seh (n=197), sea (n=51), sea-seg-sei (n=14), seg-sei (n=10), seb (n=10), seb-sed-seg-sei-sej (n=3), sea-seg-seh-sei (n=1), sea-seb (n=1), sea-sec (n=1), seg-sei plus eta (n=4), and sea-seg-sei plus tst (n=40). Most of the strains could be classified into three clusters of pulsed-field gel electrophoresis (PFGE) types A and B with coagulase type VII and type E with coagulase type IV. Of the ten sequence types (ST), ST1, ST59, and ST30 were frequently showed by multilocus sequence typing. CONCLUSIONS The strain belonging to PFGE pattern A with sea-seh gene, coagulase VII, and ST1 was the most epidemic clone of SFP incidents in Korea.
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Affiliation(s)
- J O Cha
- Department of Microbiology, National Institute of Health, Korea Center for Disease Control and Prevention (KCDC), Seoul, Republic of Korea
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Abstract
OBJECTIVE Although the diagnosis of metachronous colorectal cancer have increased, due primarily to improvements in diagnostic modalities, the potential risk factors for these tumours are not well known. We compared the characteristics of patients with metachronous and sporadic primary colorectal cancer to determine risk factors for its occurrence. PATIENTS AND METHODS We reviewed the records of 5447 patients with colorectal cancer, who had been treated at Asan Medical Centre between July 1989 and January 2004. A metachronous cancer was defined as a secondary colorectal cancer occurring more than 6 months after the index cancer. RESULTS Metachronous colorectal cancer occurred in 39 (0.7%) patients. Their average age was 53 years, somewhat younger than the average age of sporadic colorectal cancer patients (58 years). In patients with metachronous cancer, the cancer was more likely to be located in the right colon (P < 0.03), and the incidence of synchronous polyps or cancer was significantly higher (P < 0.001). The relative distributions of histological grades and clinicopathological characteristics were similar in index and metachronous cancers. Metachronous cancers were diagnosed more frequently at an early stage. The time interval between index and metachronous cancer ranged from 6 to 215 months (mean 39 months), with 13 (33.3%) patients diagnosed with metachronous cancer after 5 years. CONCLUSION We found that in patients aged < 50 years, existence of synchronous polyps or cancer influence on the development of metachronous colorectal cancer. Regular follow-up is necessary for early detection, even after 5 years, for these patients.
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Affiliation(s)
- I J Park
- Colorectal Clinic, Department of Surgery, University of Ulsan College of Medicine and Asan Medical Centre, Seoul, Korea
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Yun Z, Jung YH, Lim BR, Choi E, Min KS. The stability of nitrite nitrification with strong nitrogenous wastewater: effects of organic concentration and microbial diversity. Water Sci Technol 2004; 49:89-96. [PMID: 15137411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A stable achievement of nitritation with strong nitrogenous wastewaters is considered as a difficult task in practice, probably due to the fate of interaction between dominating heterotrophs and nitrifier species. An experimental study was carried out to examine the organic effects in lab-scale biofilm nitritation reactors. The control unit without organic addition showed a stable nitritation performance for more than 220 days of operating period. The nitritation activity gradually failed at the reactors with an organic addition, but the nitritation activity eventually recovered with a prolonged aeration. It was not possible to explain the nitritation recovery with neither free ammonia inhibition concept nor DO competition hypothesis in these cases. The results suggest that the nitritation with organic requires a long start-up period for acclimation. In addition, the results of quinone profile analysis were in agreement with nitritation activity in reactors. The diversity of microbial community in the nitritation reactors could be described by the quinone profiles.
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Affiliation(s)
- Z Yun
- Department of Environmental Engineering, Korea University, 5-1 Anam-dong, Life Science Bldg. #243, 5-1 Anam-dong, Seoul 136-701, Korea.
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Abstract
Multicenter Study on the Prevalence of Perennial Allergic Rhinitis and Allergy-Associated Disorders This study was aimed to determine the prevalence of perennial allergic rhinitis (PAR) using the skin test, radioallergosorbent test (RAST), or multiple allergosorbent test (MAST) and to clarify the clinical aspects of the patients diagnosed as having PAR by the questionnaire survey and rhinologic examination. The 71,120 subjects who had visited the 23 otolaryngology clinics at the randomly selected tertiary referral hospitals in Korea between November 1, 1999 and April 30, 2000 were studied. PAR was diagnosed when subjects complained of two or more associated symptoms and the skin test, RAST, or MAST using perennial inhalant allergens was positive. The questionnaire survey and rhinologic examination were performed in subjects with PAR. The prevalence of PAR was 3.93%. We could find no significant difference in the prevalence of PAR between the two sexes. However, there was a significant difference in the prevalence of PAR between the child and adult groups. The chief complaints were, in order of decreasing frequency, nasal obstruction, watery rhinorrhea, and sneezing. There was a family history of PAR in 40.2% of the subjects. The 39.6% of the subjects had associated allergic diseases, being atopic dermatitis most common. In conclusion, the prevalence of PAR in tertiary referral hospitals in Korea is 3.93%. Many subjects with PAR have family history and appear to be associated with other allergic diseases.
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Affiliation(s)
- Y G Min
- Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University College of Medicine, Seoul, Korea.
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Abstract
The reaction of various alkyl cinnamyl ethers with CSI afforded the corresponding cinnamylamines with various protecting groups, such as -NHMoc, -NHiPoc, -NHCbz, -NHPnz, -NHTroc and -NHAloc. In the case of cinnamyl t-butyl ether and cinnamyl p-methoxybenzyl ether, the corresponding cinnamyl carbamates were formed via a different reaction pathway from the above.
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Affiliation(s)
- Y H Jung
- Sungkyunkwan University, Organic & Medicinal Chemistry Laboratory, College of Pharmacy, Suwon 440-746, Kyonggi-Do, Korea.
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Choi WJ, Park JG, Yoo SJ, Kim HO, Moon HR, Chun MW, Jung YH, Jeong LS. Syntheses of D- and L-cyclopentenone derivatives using ring-closing metathesis: versatile intermediates for the synthesis of D- and L-carbocyclic nucleosides. J Org Chem 2001; 66:6490-4. [PMID: 11559205 DOI: 10.1021/jo015733w] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- W J Choi
- Laboratory of Medicinal Chemistry, College of Pharmacy, Ewha Woman's University, Seoul 120-750, Korea
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Abstract
Protected alpha-Phenyl glycine 17 and phenylalanine 18 and 19 have been synthesized through an efficient three-step sequence from the corresponding allyl ethers 5, 7, and 10. The key intermediate in this synthesis is the corresponding allylic amines prepared by reaction of allyl ethers with chlorosulfonyl isocyanate.
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Affiliation(s)
- Y H Jung
- Laboratory of Organomedicinal Chemistry, College of Pharmacy, Sungkyunkwan University, Suwon, Korea.
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Lee JW, Choi SB, Jung YH, Keown JF, Van Vleck LD. Parameter estimates for direct and maternal genetic effects on yearling, eighteen-month, and slaughter weights of Korean native cattle. J Anim Sci 2000; 78:1414-21. [PMID: 10875621 DOI: 10.2527/2000.7861414x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Data collected by the National Livestock Research Institute of the Rural Development Administration of Korea were used to estimate genetic parameters for yearling (YWT, n = 5,848), 18-mo (W18, n = 4,585), and slaughter (SWT, n = 2,279) weights for Korean Native cattle. Nine animal models were used to obtain REML estimates of genetic parameters: DP-2 included genetic, uncorrelated dam, and residual random effects; DQ-2 included genetic, sire x region x year-season interaction, and residual random effects; DPQ-2 was based on DQ-2 but included both interaction and dam effects; DMP-2 was based on DP-2 but with dam effect partitioned to include maternal genetic and permanent environmental effects; and DMPQ-2 was based on DMP-2 but also included sire interaction effects. Those five models included two fixed factors: region x year-season and age of dam x sex effects. Models DP-3, DQ-3, DPQ-3, and DMPQ-3 were based on DP-2, DQ-2, DPQ-2, and DMPQ-2 but included as a third fixed factor whether or not identification of the sire was known. Estimates of heritability with DMPQ-3 for YWT, with DPQ-3 for W18 and SWT when analyzed with single-trait analyses were .14, .11, and .17, respectively, and were nearly the same with bivariate analyses. Estimate of maternal heritability for YWT from single-trait analysis was .04, with estimates for other traits near zero. For bivariate analyses, the estimate for YWT was .01. With single trait analysis, estimate of the direct-maternal genetic correlation for YWT was negative (-.81). Estimates of direct genetic correlations between YWT and W18, YWT and SWT, and W18 and SWT were .99, 1.00, and .97, respectively. Estimates of environmental correlations varied from .60 to .81; the largest was between W18 and SWT. Including a fixed factor for whether sire identification was missing or not missing reduced the estimate of heritability for slaughter weight. The results suggest that the sire x region x year-season interaction is important for yearling weight and may be needed in a model for slaughter weight. Maternal effects may be of slight importance for yearling weight but of no importance for W18 and SWT. Models for national cattle evaluations for Korean Native cattle for YWT should be considered that include maternal genetic and permanent environmental as well as sire x region x year-season interaction effects, but those effects seem not to be needed for models for W18 and SWT. Not much reranking of sires occurred when ranked was based on the different models for W18 and SWT.
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Affiliation(s)
- J W Lee
- Department of Animal Science, University of Nebraska, Lincoln 68583-0908, USA
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Jew SS, Yoo CH, Lim DY, Kim H, Mook-Jung I, Jung MW, Choi H, Jung YH, Kim H, Park HG. Structure-activity relationship study of asiatic acid derivatives against beta amyloid (A beta)-induced neurotoxicity. Bioorg Med Chem Lett 2000; 10:119-21. [PMID: 10673093 DOI: 10.1016/s0960-894x(99)00658-7] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
8 Semi-synthetic derivatives of asiatic acid were prepared and their protective effect against A beta-induced neurotoxicity was evaluated. Among them, asiatic acid (2), and 4, 16 showed 97, 92 and 87% of protective effect, respectively.
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Affiliation(s)
- S S Jew
- College of Pharmacy, Seoul National University, South Korea
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Abstract
A formal asymmetric synthesis of Mugineic acid was accomplished from cis-2-butene-1,4-diol through catalytic Sharpless epoxidation oxidations and coupling reaction.
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Affiliation(s)
- Y H Jung
- Laboratory of Organic Medicinal Chemistry, College of Pharmacy, Sungkyunkwan University, Suwon, Korea.
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Abstract
Total synthesis of (+/-)-homoepibatidine (2), which contains the 8-azabicyclo[3.2.1] octane ring system, was achieved by using palladium-catalyzed Heck-type coupling reaction from 3.
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Affiliation(s)
- Y H Kim
- College of Pharmacy, SungKyunKwan University, Suwon, Korea
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Jew S, Lim D, Seo SK, Nam TG, Park H, Kim HD, Kim CM, Lee MH, Paik HG, Lee MJ, Jung YH. Regioselective ring opening of steroidal epoxide with hydrides: formation of C(2)- and C(3)-deoxyasiatic acid derivatives. Arch Pharm Res 1998; 21:793-5. [PMID: 9868561 DOI: 10.1007/bf02976781] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- S Jew
- College of Pharmacy, Seoul National University, Korea
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Han EM, Jung YH, On HY, Lee MS, Yang YK, Kim Y, Kim CK, Lee KS, Min KH. Tn5 tagging of the phenol-degrading gene on the chromosome of Pseudomonas putida. Mol Cells 1997; 7:40-4. [PMID: 9085263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Transposon mutagenesis was performed by the method of conjugational transfer in order to identify and characterize genes encoding enzymes involved in the pathway of phenol utilization as a carbon source. Escherichia coli, which carries the Tn5-132, Was mated with Pseudomonas putida SM25 as a host. We selected a mutant that could not utilize phenol as a carbon source. Chromosomal integration of the transposon was confirmed by Southern analysis, successfully tagging the gene related to a phenol-utilizing pathway. By cell-free enzyme and genetic complementation assays, the inactivated enzyme through the mutation of the corresponding gene was identified as the catB gene, which encodes a cis,cis-muconate lactonizing enzyme.
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Affiliation(s)
- E M Han
- Department of Biology, Sookmyung Women's University, Seoul, Korea
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Abstract
The promoter of the rnpB gene (encoding the RNA component of Escherichia coli RNase P) shares a consensus discriminator sequence, located between the -10 hexamer sequence and the transcription start site, with other promoters whose activities are repressed upon stringent condition. Under stringent conditions induced by seryl-tRNA starvation the transcription of the rnpB gene was repressed in wild type E. coli but not in a relaxed strain carrying a relA- mutation. Site-directed mutagenesis was carried out to examine sequences of the rnpB promoter necessary for stringent control. The results indicate that the discriminator region is responsible for the transcription repression of the rnpB gene during the stringent response and that both the content and position of GC pairs in the region determine the strength of negative stringent signals.
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Affiliation(s)
- Y H Jung
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Taejon
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Lee YJ, Chung TJ, Park CW, Hahn Y, Chung JH, Lee BL, Han DM, Jung YH, Kim S, Lee Y. Structure and expression of the tenecin 3 gene in Tenebrio molitor. Biochem Biophys Res Commun 1996; 218:6-11. [PMID: 8573176 DOI: 10.1006/bbrc.1996.0002] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
A genomic DNA fragment encoding tenecin 3, an antifungal protein was cloned from the genomic DNA library of Tenebrio molitor. The DNA sequence analysis showed that the coding region is divided into two exons by an intron of 49 bp in the middle of the putative leader peptide coding region. Southern blot analysis suggests that the gene is present as a single copy. The transcription initiation site was determined by primer extension analysis and S1 mapping. The TATA box and CCAAT box sequences were found at -30, and -121, respectively, from the transcription initiation site. Tenecin 3 mRNA is abundantly expressed in larvae and adults, while little was detected in RNAs from pupae, suggesting that the expression of the tenecin 3 gene is developmentally regulated.
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Affiliation(s)
- Y J Lee
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Taejon, Korea
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Abstract
ColE1 DNA replication is initiated by RNA II and inhibited by RNA I. Control of the replication occurs through the interaction between RNA I and RNA II. Therefore, RNases involved in the metabolism of RNA I and RNA II are expected to play a key role in the control of the ColE1 plasmid replication. RNase H, RNase E, RNase III, RNase P, and polynucleotide phosphorylase carry out the many specific reactions of the RNA metabolism.
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Affiliation(s)
- Y H Jung
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Taejon, Korea
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Affiliation(s)
- Y H Jung
- Research and Development Center, Cheil Foods & Chemicals Inc., Ichon, Kyonggi-Do, Korea
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Ham WH, Yang JG, Lim TG, Jung YH, Chung YS. Synthesis of antihypertensive agents via coupling reaction of benzothiazepinone and 1,4-dihydropyridine derivatives. Arch Pharm Res 1994; 17:119-23. [PMID: 10319143 DOI: 10.1007/bf02974235] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The synthesis of 3a, 3b, 7a and 7b from Benzothiazepinone and 1,4-dihyropyridine derivatives is described. Benzothiazepinone and 1,4-dihydropyridine derivatives were prepared according to literature procedure. The key reactions involve esterification and amidation of benzothiazepinone and 1,4-dihydropyridine derivatives.
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Affiliation(s)
- W H Ham
- College of Pharmacy, SungKyunKwan University, Suwon, Korea
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Abstract
E. coli strain A49 carries the themosensitive mutation in the rnpA gene encoding the protein component of RNase P, a tRNA-processing enzyme. Two small RNAs were highly accumulated in the A49 carrying derivatives of ColE1-type plasmids, at nonpermissive temperature. Characterization of these RNAs showed that they were the processed or degraded products derived from RNA I, which is the negative controller of ColE1-type plasmid replication. These derivatives of RNA I only differ in size at the 5' ends. The data of their degradation and synthesis kinetics suggest that they are intermediates of RNA I metabolism.
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Affiliation(s)
- Y H Jung
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Taejon
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