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Moon I, Park SY, Kim D, Park M, Park S, Kwon SS, Kong MG, Park HW, Choi HO, Suh J, Cho YH, Lee NH, Seo HS. Incidence of atrial fibrillation in patients with renal infarction: A retrospective cohort analysis of the Korean national health insurance registry. Int J Cardiol 2024; 407:132075. [PMID: 38643801 DOI: 10.1016/j.ijcard.2024.132075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2024] [Revised: 04/03/2024] [Accepted: 04/17/2024] [Indexed: 04/23/2024]
Abstract
BACKGROUND Regarding the pathophysiology of renal infarction (RI), cardioembolic causes could have large proportion. However, there are notable variations in prevalence of atrial fibrillation (AF) among patients with RI across different studies, ranging from 17 to 65%. The primary objective of this study is to analyze the incidence of AF in patients with RI. METHODS This nationwide retrospective cohort study enrolled 5200 patients with RI from the Korean National Institute of Health Services database spanning the years 2013 to 2019. The study accessed the AF incidence rate within 12 months in patients without a prior history of AF. Events occurring within 3 months of RI diagnosis were excluded to mitigate cases diagnosed during the initial screening or those with AF diagnoses that were potentially overlooked in the past. RESULTS AF occurred in 19.1% of patients with RI over the entire period (median: 2.5 years, interquartile range 1.04-4.25 years). The majority of AF cases (16.1%) occured within the first year, resulting in an overall incidence rate of 7.0 per 100 person-years. Patients with newly developed AF were, on average, older than those who did not develop AF (64.1 vs. 57.3 years, P < 0.001). The independent predictors of AF were identified as age, male sex, higher body mass index, current smoking, ischemic heart disease, and heart failure. CONCLUSIONS Physicians should consider the implementation of active rhythm monitoring for patients with RI to identify potential occurrence of subclinical AF, even if not initially diagnosed during the initial screening after RI diagnosis.
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Affiliation(s)
- Inki Moon
- Division of Cardiology, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Republic of Korea
| | - Su Yeong Park
- Division of Cardiology, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Republic of Korea
| | - Dongon Kim
- Division of Cardiology, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Republic of Korea
| | - Minae Park
- Department of Data Science, Hanmi Pharm. Co., Ltd., Seoul, Republic of Korea
| | - Sojeong Park
- Department of Data Science, Hanmi Pharm. Co., Ltd., Seoul, Republic of Korea
| | - Seong Soon Kwon
- Division of Cardiology, Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Republic of Korea
| | - Min Gyu Kong
- Division of Cardiology, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Republic of Korea
| | - Hyun Woo Park
- Division of Cardiology, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Republic of Korea
| | - Hyung Oh Choi
- Division of Cardiology, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Republic of Korea
| | - Jon Suh
- Division of Cardiology, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Republic of Korea
| | - Yoon Haeng Cho
- Division of Cardiology, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Republic of Korea
| | - Nae Hee Lee
- Division of Cardiology, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Republic of Korea
| | - Hye-Sun Seo
- Division of Cardiology, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Republic of Korea.
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Kim DE, Moon I, Park S, Park M, Park S, Kwon SS, Kong MG, Park HW, Choi HO, Seo HS, Cho YH, Lee NH, Suh J. Temporal Trend of the Incidence and Characteristics of Renal Infarction: Korean Nationwide Population Study. J Korean Med Sci 2023; 38:e239. [PMID: 37550807 PMCID: PMC10412037 DOI: 10.3346/jkms.2023.38.e239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 04/04/2023] [Indexed: 08/09/2023] Open
Abstract
BACKGROUND Large-scale studies about epidemiologic characteristics of renal infarction (RI) are few. In this study, we aimed to analyze the incidence and prevalence of RI with comorbidities in the South Korean population. METHODS We investigated the medical history of the entire South Korean adult population between 2013 and 2019 using the National Health Insurance Service database (n = 51,849,591 in 2019). Diagnosis of RI comorbidities were confirmed with International Classification of Disease, Tenth Revision, Clinical Modification codes. Epidemiologic characteristics, distribution of comorbidities according to etiologic mechanisms, and trend of antithrombotic agents were estimated. RESULTS During the 7-years, 10,496 patients were newly diagnosed with RI. The incidence rate increased from 2.68 to 3.06 per 100,000 person-years during the study period. The incidence rate of RI increased with age peaking in the 70s with 1.41 times male predominance. The most common comorbidity was hypertension, followed by dyslipidemia and diabetes mellitus. Regarding etiologic risk factor distribution, high embolic risk group, renovascular disease group, and hypercoagulable state group accounted for 16.6%, 29.1%, and 13.7% on average, respectively. For the antithrombotic treatment of RI, the prescription of antiplatelet agent gradually decreased from 17.0% to 13.0% while that of anticoagulation agent was maintained around 35%. The proportion of non-vitamin K antagonist oral anticoagulants remarkably increased from only 1.4% to 17.6%. CONCLUSION Considering the progressively increasing incidence of RI and high prevalence of coexisting risk factors, constant efforts to raise awareness of the disease are necessary. The current epidemiologic investigation of RI would be the stepping-stone to establishing future studies about clinical outcomes and optimal treatment strategies.
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Affiliation(s)
- Dong-Eon Kim
- Division of Cardiology, Soonchunhyang University Bucheon Hospital, Bucheon, Korea
| | - Inki Moon
- Division of Cardiology, Soonchunhyang University Bucheon Hospital, Bucheon, Korea
| | - Suyeong Park
- Division of Cardiology, Soonchunhyang University Bucheon Hospital, Bucheon, Korea
| | - Minae Park
- Department of Data Science, Hanmi Pharm. Co., Ltd., Seoul, Korea
| | - Sojeong Park
- Department of Data Science, Hanmi Pharm. Co., Ltd., Seoul, Korea
| | - Seong Soon Kwon
- Division of Cardiology, Soonchunhyang University Seoul Hospital, Seoul, Korea
| | - Min Gyu Kong
- Division of Cardiology, Soonchunhyang University Bucheon Hospital, Bucheon, Korea
| | - Hyun Woo Park
- Division of Cardiology, Soonchunhyang University Bucheon Hospital, Bucheon, Korea
| | - Hyung Oh Choi
- Division of Cardiology, Soonchunhyang University Bucheon Hospital, Bucheon, Korea
| | - Hye-Sun Seo
- Division of Cardiology, Soonchunhyang University Bucheon Hospital, Bucheon, Korea
| | - Yoon Haeng Cho
- Division of Cardiology, Soonchunhyang University Bucheon Hospital, Bucheon, Korea
| | - Nae Hee Lee
- Division of Cardiology, Soonchunhyang University Bucheon Hospital, Bucheon, Korea
| | - Jon Suh
- Division of Cardiology, Soonchunhyang University Bucheon Hospital, Bucheon, Korea.
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Park KW, Kang J, Koo BK, Rhee TM, Yang HM, Won KB, Rha SW, Bae JW, Lee NH, Hur SH, Han JK, Shin ES, Kim HS. Aspirin vs. Clopidogrel as a Chronic maintenance monotherapy after PCI in patients with high ischemic risk and high bleeding risk: Subgroup analysis of the HOST-EXAM trial. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehab849.074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: None.
OnBehalf
on behalf of the HOST-EXAM investigators
Background
The HOST-EXAM randomized clinical trial recently performed a comparison of clopidogrel monotherapy vs. aspirin monotherapy in patients requiring indefinite antiplatelet monotherapy after percutaneous coronary intervention (PCI). This study randomized 5,438 patients who maintained dual antiplatelet therapy without clinical events for 6–18 months after PCI with drug-eluting stents (DES) to receive a monotherapy agent of clopidogrel 75 mg once daily or aspirin 100 mg once daily for 24 months. During the 24-month follow-up, the primary outcome (a composite of all-cause death, non-fatal myocardial infarction, stroke, readmission due to acute coronary syndrome, and Bleeding Academic Research Consortium (BARC) bleeding type 3 or greater) rate was significantly lower in the clopidogrel group (hazard ratio [HR] 0.73 [95% CI 0.59–0.90]; p = 0.0035). However, it is uncertain whether the beneficial effect of clopidogrel will be consistent in patients with high ischemic risk or those with high bleeding risk.
Methods
This is a post-hoc analysis of the HOST-EXAM trial. A high ischemic risk was defined as those who had at least 1 of the following procedural features: 3 vessels treated, ≥3 stents implanted, ≥3 lesions treated, bifurcation PCI, total stent length >60 mm, or left main PCI. Patients with high bleeding risk were defined according to the Academic Research Consortium for High Bleeding Risk (ARC-HBR) criteria. The co-primary outcome were thrombotic endpoints (a composite of cardiac death, non-fatal myocardial infarction, ischemic stroke, readmission due to acute coronary syndrome, and definite or probable stent thrombosis) and bleeding endpoints (BARC type ≥2 bleeding events) at 24-month follow-up.
Results
Among the total population, 22.1% had high ischemic risk and 21.4% had high bleeding risk. Complex PCI was not associated with a higher risk of thrombotic endpoints, nor bleeding endpoints. For patients with a high bleeding risk, these patients had a higher risk of both thrombotic endpoints (HR 1.545, 95% CI 0.141-2.092, p = 0.005) and bleeding endpoints (HR 3.418, 95% CI 2.413-4.840, p < 0.001). The primary results focusing on the interaction between high ischemic risk, high bleeding and the antiplatelet regimen will be presented.
Conclusion
The current post-hoc analysis of the HOST-EXAM trial will evaluate the efficacy of clopidogrel monotherapy vs. aspirin monotherapy during the chronic maintenance period after PCI, in patients with high ischemic risk or those with high bleeding risk.
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Affiliation(s)
- K W Park
- Chungbuk National University Hospital, Cheongju, Korea (Republic of)
| | - J Kang
- Seoul National University Hospital, Seoul, Korea (Republic of)
| | - B K Koo
- Seoul National University Hospital, Seoul, Korea (Republic of)
| | - T M Rhee
- Seoul National University Hospital, Seoul, Korea (Republic of)
| | - H M Yang
- Seoul National University Hospital, Seoul, Korea (Republic of)
| | - K B Won
- Ulsan University Hospital, Ulsan, Korea (Republic of)
| | - S W Rha
- Korea University Guro Hospital, Seoul, Korea (Democratic People"s Republic of)
| | - J W Bae
- Chungbuk National University Hospital, Cheongju, Korea (Republic of)
| | - N H Lee
- Hangang Sacred Hospital, Seoul, Korea (Republic of)
| | - S H Hur
- Keimyung University Hospital, Daegu, Korea (Republic of)
| | - J K Han
- Seoul National University Hospital, Seoul, Korea (Republic of)
| | - E S Shin
- Ulsan University Hospital, Ulsan, Korea (Republic of)
| | - H S Kim
- Seoul National University Hospital, Seoul, Korea (Republic of)
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Kong MG, Park HW, Choi HO, Seo HS, Suh J, Cho YH, Lee NH. P6445Stress hyperglycemia and in-hospital mortality in patients with ST-segment elevation myocardial infarction. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.1039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Introduction
Stress hyperglycemia is common in acute ill patients and associated with poor clinical outcomes. Some studies demonstrated the association of stress hyperglycemia and poor outcomes in acute MI. However, current results for the impact of stress hyperglycemia on mortality in acute MI who underwent PCI are insufficient.
Purpose
We aimed to evaluate the impact of stress hyperglycemia on clinical outcomes of patients with STEMI underwent primary PCI in large scale multi-center registry.
Methods
From 2007 to 2014, in 1,538 patients of the INTERSTELLAR (Incheon-Bucheon Cohort of Patients Undergoing Primary PCI for Acute ST-Elevation Myocardial Infarction) cohort, 997 patients without diabetes who underwent primary PCI for STEMI were retrospectively analyzed. We defined random glucose more than 200mg/dl at admission without diabetic history or results of HbA1C more than 6.5% as stress hyperglycemia. The primary endpoint was in-hospital all-cause death and the secondary endpoint was all-cause death within 1 year after index PCI.
Results
From 997 nondiabetic cohort population, 117 patients with stress hyperglycemia and 880 patients without stress hyperglycemia were enrolled. Baseline characteristics including age, sex, hypertension, hyperlipidemia, atrial fibrillation, left main disease, and multivessel disease were not significantly different between two groups. However, systolic blood pressure was lower (111.2±39.2 vs. 125.5±28.1, p<0.001) and hypoxic liver injury was frequent (31.0% vs. 20.1%, p=0.007) in stress hyperglycemia. In-hospital and 1-year all-cause mortality were higher in stress hyperglycemia (13.7% vs. 2.7%, p<0.001; 15.4% vs. 3.8%, p<0.001, respectively). However, there is no significant difference in post-discharge mortality rate. Stress hyperglycemia was a significant independent predictor of in-hospital death (adjusted OR: 5.67, 95% CI: 2.40–13.39; p<0.001). Hypotension (defined less than 90mmHg) and left ventricular dysfunction (defined less than 40% of LVEF on echocardiography) were significantly associated with stress hyperglycemia (adjusted OR: 5.72, 95% CI: 3.33–9.82; p<0.001; adjusted OR: 2.38, 95% CI: 1.49–3.82; p<0.001, respectively).
Landmark analysis of all-cause death
Conclusions
In nondiabetic patients who underwent primary PCI for STEMI, stress hyperglycemia is significantly associated with an increased in-hospital all-cause mortality but did not increase post-discharge mortality within 1 year.
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Affiliation(s)
- M G Kong
- Soonchunhyang University Hospital, Bucheon, Korea (Republic of)
| | - H W Park
- Soonchunhyang University Hospital, Bucheon, Korea (Republic of)
| | - H O Choi
- Soonchunhyang University Hospital, Bucheon, Korea (Republic of)
| | - H S Seo
- Soonchunhyang University Hospital, Bucheon, Korea (Republic of)
| | - J Suh
- Soonchunhyang University Hospital, Bucheon, Korea (Republic of)
| | - Y H Cho
- Soonchunhyang University Hospital, Bucheon, Korea (Republic of)
| | - N H Lee
- Soonchunhyang University Hospital, Bucheon, Korea (Republic of)
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Kim MJ, Kim SS, Park KJ, An HJ, Choi YH, Lee NH, Hyun CG. Methyl jasmonate inhibits lipopolysaccharide-induced inflammatory cytokine production via mitogen-activated protein kinase and nuclear factor-κB pathways in RAW 264.7 cells. Pharmazie 2018; 71:540-543. [PMID: 29441852 DOI: 10.1691/ph.2016.6647] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 09/29/2022]
Abstract
Methyl jasmonate is an important signaling molecule involved in plant defense as well as in the regulation of plant growth and development. Despite its various functions in plants, its effects on animal cells have not been widely studied and no report has been issued on the molecular aspects of its anti-inflammatory effect. In the present study, we investigated the in vitro anti-inflammatory properties of methyl jasmonate in lipopolysaccharide (LPS)-stimulated RAW 264.7 cells. Methyl jasmonate treatment effectively inhibited LPS-induced production of pro-inflammatory mediators (nitric oxide and prostaglandin E2) and cytokines (tumor necrosis factor-α, interleukin (IL)-1β, and IL-6) in a concentration-dependent manner. Furthermore, it attenuated the LPS-induced activation of nuclear factor-κB (NF-κB) by suppressing the degradation of the inhibitor of κB-α (IκB-α). Additionally, methyl jasmonate dose-dependently blocked the phosphorylation of mitogen-activated protein kinases (MAPKs), i.e., p38 kinase, extracellular signal-regulated kinase (ERK) 1/2, and c-Jun N-terminal kinase (JNK), in these cells. These results suggest that methyl jasmonate attenuated the LPS-induced release of pro-inflammatory mediators and cytokines by suppressing the activation of MAPK (JNK, ERK and p38) and NF-κB signaling. This study not only demonstrated that methyl jasmonate exerts anti-inflammatory activities in macrophages but also revealed its potential as a candidate for the treatment of various inflammation-associated diseases.
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6
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Park HS, Kim YJ, Bae YK, Lee NH, Lee YJ, Hah JO, Park TI, Lee KS, Park JB, Kim HS. Differential Expression Patterns of Irf3 and Irf7 in Pediatric Lymphoid Disorders. Int J Biol Markers 2018; 22:34-8. [PMID: 17393359 DOI: 10.1177/172460080702200105] [Citation(s) in RCA: 3] [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: 11/15/2022]
Abstract
Interferon regulatory factors (IRFs) are multifunctional transcriptional factors. To define the role of IRFs in lymphoid disorders, we determined the expression patterns of IRF3 and IRF7 by immunohistochemistry in 5 normal lymph nodes, 12 reactive hyperplastic lymph nodes, and 27 pediatric lymphomas. IRF3 was prominently expressed in the nuclei of the histiocytes, and was expressed very weakly in the cytoplasm of most of the lymphocytes of the normal lymph nodes. However, IRF7 was expressed strongly in the nuclei of over 50% of the lymphocytes throughout the normal lymph nodes, but the histiocytes and fibroblasts were spared. In the reactive hyperplastic lymph nodes, the number of IRF3- and IRF7-positive cells in the nuclei was elevated. In the lymphomas, the number of IRF3-positive cells in the nucleus appeared to have decreased, and the cells were scattered throughout the lymphoma tissue in no specific pattern. However, in most cases the number of IRF7-positive cells was elevated. These results suggested that IRF3 was activated principally in the histiocytes and T cells under inflammatory conditions, but IRF3 activation was attenuated in cases of lymphoma. However, the number of IRF7-positive cells was found to be elevated in the reactive hyperplastic lymph nodes and pediatric lymphoma.
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Affiliation(s)
- H S Park
- Department of Microbiology, College of Medicine, Yeungnam University, Daegu, Korea
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Zheng J, Hewage SRKM, Piao MJ, Kang KA, Han X, Kang HK, Yoo ES, Koh YS, Lee NH, Ko CS, Lee JC, Ko MH, Hyuna JW. Photoprotective Effect of Carpomitra costata Extract against Ultraviolet B-Induced Oxidative Damage in Human Keratinocytes. J Environ Pathol Toxicol Oncol 2016; 35:11-28. [PMID: 27279581 DOI: 10.1615/jenvironpatholtoxicoloncol.2016014003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Natural marine products show various biological properties such as antiphotoaging, antioxidant, anticancer, and anti-inflammation. This study evaluated the protective effects of the brown alga Carpomitra costata (Stackhouse) Batters (Sporochnaceae) against ultraviolet B (UVB)-provoked damage in human HaCaT keratinocytes. C. costata extract (CCE) effectively reduced superoxide anion, hydroxyl radical, and UVB-stimulated intracellular reactive oxygen species (ROS) levels. CCE also restored the expression and activity of UVB-suppressed antioxidant enzymes. Furthermore, CCE decreased UVB-triggered oxidative damage to cellular components including DNA, protein, and lipid and defended the cells against mitochondrial membrane depolarization-medicated apoptosis. The results of this study indicate that CCE can safeguard human keratinocytes against UVB-induced cellular damage via a potent antioxidant mechanism. CCE may find utility as part of a therapeutic arsenal against the damaging effects of UVB radiation on the skin.
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Affiliation(s)
- J Zheng
- School of Medicine, Jeju National University, Jeju, Republic of Korea
| | | | - Mei Jing Piao
- School of Medicine, Jeju National University, Jeju, Republic of Korea
| | - Kyoung Ah Kang
- School of Medicine, Jeju National University, Jeju, Republic of Korea
| | - X Han
- School of Medicine, Jeju National University, Jeju, Republic of Korea
| | - H K Kang
- School of Medicine, Jeju National University, Jeju, Republic of Korea
| | - E S Yoo
- School of Medicine, Jeju National University, Jeju, Republic of Korea
| | - Y S Koh
- School of Medicine, Jeju National University, Jeju, Republic of Korea
| | - N H Lee
- Department of Chemistry, College of Natural Sciences, Jeju National University, Jeju, Republic of Korea
| | - C S Ko
- Jeju Biodiversity Research Institute, Jeju Technopark, Jeju, Republic of Korea
| | - J C Lee
- Jeju Biodiversity Research Institute, Jeju Technopark, Jeju, Republic of Korea
| | - Mi Hee Ko
- Jeju Biodiversity Research Institute, Jeju Technopark, Jeju, Republic of Korea
| | - Jin Won Hyuna
- School of Medicine, Jeju National University, Jeju, Republic of Korea
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Devaney JM, Wang S, Furbert-Harris P, Apprey V, Ittmann M, Wang BD, Olender J, Lee NH, Kwabi-Addo B. Genome-wide differentially methylated genes in prostate cancer tissues from African-American and Caucasian men. Epigenetics 2015; 10:319-28. [PMID: 25864488 DOI: 10.1080/15592294.2015.1022019] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Increasing evidence suggests that aberrant DNA methylation changes may contribute to prostate cancer (PCa) ethnic disparity. To comprehensively identify DNA methylation alterations in PCa disparity, we used the Illumina 450K methylation platform to interrogate the methylation status of 485,577 CpG sites focusing on gene-associated regions of the human genome. Genomic DNA from African-American (AA; 7 normal and 3 cancers) and Caucasian (Cau; 8 normal and 3 cancers) was used in the analysis. Hierarchical clustering analysis identified probe-sets unique to AA and Cau samples, as well as common to both. We selected 25 promoter-associated novel CpG sites most differentially methylated by race (fold change > 1.5-fold; adjusted P < 0.05) and compared the β-value of these sites provided by the Illumina, Inc. array with quantitative methylation obtained by pyrosequencing in 7 prostate cell lines. We found very good concordance of the methylation levels between β-value and pyrosequencing. Gene expression analysis using qRT-PCR in a subset of 8 genes after treatment with 5-aza-2'-deoxycytidine and/or trichostatin showed up-regulation of gene expression in PCa cells. Quantitative analysis of 4 genes, SNRPN, SHANK2, MST1R, and ABCG5, in matched normal and PCa tissues derived from AA and Cau PCa patients demonstrated differential promoter methylation and concomitant differences in mRNA expression in prostate tissues from AA vs. Cau. Regression analysis in normal and PCa tissues as a function of race showed significantly higher methylation prevalence for SNRPN (P = 0.012), MST1R (P = 0.038), and ABCG5 (P < 0.0002) for AA vs. Cau samples. We selected the ABCG5 and SNRPN genes and verified their biological functions by Western blot analysis and siRNA gene knockout effects on cell proliferation and invasion in 4 PCa cell lines (2 AA and 2 Cau patients-derived lines). Knockdown of either ABCG5 or SNRPN resulted in a significant decrease in both invasion and proliferation in Cau PCa cell lines but we did not observe these remarkable loss-of-function effects in AA PCa cell lines. Our study demonstrates how differential genome-wide DNA methylation levels influence gene expression and biological functions in AA and Cau PCa.
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Affiliation(s)
- J M Devaney
- a Children's National Medical Center ; Center for Genetic Medicine Research ; Washington, DC USA
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Youn JC, Ihm SH, Bae JH, Park SM, Jeon DW, Jung BC, Park TH, Lee NH, Song JM, Yoon YW, Shin ES, Sung KC, Jung IH, Pyun WB, Joo SJ, Park WJ, Shin JH, Kang SM. Efficacy and Safety of 30-Mg Fimasartan for the Treatment of Patients With Mild to Moderate Hypertension: An 8-Week, Multicenter, Randomized, Double-Blind, Phase III Clinical Study. Clin Ther 2014; 36:1412-21. [DOI: 10.1016/j.clinthera.2014.07.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 06/24/2014] [Accepted: 07/08/2014] [Indexed: 11/16/2022]
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10
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Hyun YJ, Piao MJ, Kim KC, Zheng J, Yao CW, Cha JW, Kang HK, Yoo ES, Koh YS, Lee NH, Ko MH, Hyun JW. Photoprotective Effect of a <i>Polyopes affinis</i> (Harvey) Kawaguchi and Wang (<i>Halymeniaceae</i>)-Derived Ethanol Extract on Human Keratinocytes. TROP J PHARM RES 2014. [DOI: 10.4314/tjpr.v13i6.6] [Citation(s) in RCA: 5] [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: 11/17/2022] Open
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Choi J, Suh J, Seo HS, Cho YH, Lee NH. A case of sheathless transradial coronary intervention for complex coronary lesions with a standard guiding catheter. Korean Circ J 2013; 43:347-50. [PMID: 23755083 PMCID: PMC3675311 DOI: 10.4070/kcj.2013.43.5.347] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2012] [Revised: 09/26/2012] [Accepted: 09/28/2012] [Indexed: 11/21/2022] Open
Abstract
One of the major limitations of transradial coronary intervention is the inability to use large guiding system, which leads to the development of dedicated sheathless guide catheter system. However, these devices are not available in the Republic of Korea. We present a case in which conventional guiding catheter was used for sheathless transradial coronary intervention in the treatment of complex coronary anatomy.
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Affiliation(s)
- Jaehuk Choi
- Division of Cardiology, Department of Internal Medicine, Soonchunhyang University Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea
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Choi J, Jo H, Kim EJ, Jung YK, Suh J, Cho YH, Lee NH, Seo HS. Infective endocarditis with dissection of sinus of valsalva mimicking type a aortic dissection. J Cardiovasc Ultrasound 2012; 20:216-7. [PMID: 23346295 PMCID: PMC3542519 DOI: 10.4250/jcu.2012.20.4.216] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2012] [Revised: 08/07/2012] [Accepted: 11/21/2012] [Indexed: 11/22/2022] Open
Affiliation(s)
- Jaehuk Choi
- Division of Cardiology, Department of Internal Medicine, Soonchunhyang University Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea
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Yoon WJ, Moon JY, Song G, Lee YK, Han MS, Lee JS, Ihm BS, Lee WJ, Lee NH, Hyun CG. Artemisia fukudo essential oil attenuates LPS-induced inflammation by suppressing NF-kappaB and MAPK activation in RAW 264.7 macrophages. Food Chem Toxicol 2010; 48:1222-9. [PMID: 20156520 DOI: 10.1016/j.fct.2010.02.014] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2009] [Revised: 02/06/2010] [Accepted: 02/08/2010] [Indexed: 01/21/2023]
Abstract
In the present study, the chemical constituents of Artemisia fukudo essential oil (AFE) were investigated using GC-MS. The major constituents were alpha-thujone (48.28%), beta-thujone (12.69%), camphor (6.95%) and caryophyllene (6.01%). We also examined the effects of AFE on the production of nitric oxide (NO), prostaglandin E(2) (PGE(2)), tumour necrosis factor (TNF)-alpha, interleukin (IL)-1beta, and IL-6, in lipopolysaccharide (LPS)-activated RAW 264.7 macrophages. Western blotting and RT-PCR tests indicated that AFE has potent dose-dependent inhibitory effects on pro-inflammatory cytokines and mediators. We investigated the mechanism by which AFE inhibits NO and PGE(2) by examining the level of nuclear factor-kappaB (NF-kappaB) activation within the mitogen-activated protein kinase (MAPK) pathway, which is an inflammation-induced signal pathway in RAW 264.7 cells. AFE inhibited LPS-induced ERK, JNK, and p38 phosphorylation. Furthermore, AFE inhibited the LPS-induced phosphorylation and degradation of Ikappa-B-alpha, which is required for the nuclear translocations of the p50 and p65 NF-kappaB subunits in RAW 264.7 cells. Our results suggest that AFE might exert an anti-inflammatory effect by inhibiting the expression of pro-inflammatory cytokines. Such an effect is mediated by a blocking of NF-kappaB activation which consequently inhibits the generation of inflammatory mediators in RAW264.7 cells. AFE may be useful for treating inflammatory diseases.
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Affiliation(s)
- W J Yoon
- Jeju Biodiversity Research Institute, Jeju High-Tech Development Institute, Jeju, Republic of Korea
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14
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Lee NH, Suh J, Seo HS. Double anchoring balloon technique for recanalization of coronary chronic total occlusion by retrograde approach. Catheter Cardiovasc Interv 2009; 73:791-4. [DOI: 10.1002/ccd.21940] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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15
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Lee NH, Suh J, Cho YH, Seo HS, Choi JH, Choi MH, Ryu YS. Recanalization of a Coronary Chronic Total Occlusion by a Retrograde Approach Using Ipsilateral Double Guiding Catheters. Korean Circ J 2009. [DOI: 10.4070/kcj.2009.39.1.42] [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: 11/11/2022] Open
Affiliation(s)
- Nae Hee Lee
- Division of Cardiology, Department of Medicine, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - Jon Suh
- Division of Cardiology, Department of Medicine, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - Yoon-Haeng Cho
- Division of Cardiology, Department of Medicine, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - Hye-Sun Seo
- Division of Cardiology, Department of Medicine, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - Jae-Huk Choi
- Division of Cardiology, Department of Medicine, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - Moon-Han Choi
- Division of Cardiology, Department of Medicine, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - Yang-Seon Ryu
- Division of Cardiology, Department of Medicine, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea
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16
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Suh J, Cho YH, Lee NH. Bail-out reverse controlled antegrade and retrograde subintimal tracking accompanied by multiple complications in coronary chronic total occlusion. J Invasive Cardiol 2008; 20:E334-E337. [PMID: 19057041] [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: 05/27/2023]
Abstract
Recently, a retrograde approach through collateral channels was introduced to improve the success rate of percutaneous coronary intervention (PCI) for a coronary chronic total occlusion (CTO). Among the various wire-crossing techniques via the retrograde approach, the reverse controlled antegrade and retrograde subintimal tracking (reverse CART) technique is the most rarely used due to technical difficulties and the probability of causing an iatrogenic dissection. We describe a case in which the conventional antegrade approach failed and the reverse CART technique was performed successfully in the setting of severe dissection, suggesting the usefulness of this novel technique. However, we encountered unexpected collateral-donor vessel complications that could have resulted in life-threatening ischemia, suggesting that a systemized approach by a highly-experienced operator is essential in ensuring the success of this complex procedure.
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Affiliation(s)
- Jon Suh
- Division of Cardiology, SoonChunHyang University Bucheon Hospital, Wonmi-Gu, Bucheon-Si, Gyeonggi-Do, Korea
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17
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Lee NH, Cho YH, Seo HS. Successful recanalization of in-stent coronary chronic total occlusion by subintimal tracking. J Invasive Cardiol 2008; 20:E129-E132. [PMID: 18398245] [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: 05/26/2023]
Abstract
Percutaneous coronary intervention (PCI) of a chronic total occlusion (CTO) caused by in-stent restenosis (ISR) is sometimes very difficult due to the presence of hard occlusive components that prevent wire passage. We report a case of CTO caused by ISR (ISR-CTO) in which the occlusion was crossed with the wire subintimally along the outside of the stent and was successfully re-stented. Subintimal tracking along the outside of the stent can be considered as another approach for PCI of ISR-CTO in cases where conventional approaches fail.
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Affiliation(s)
- Nae Hee Lee
- Department of Cardiology, Soon Chun Hyang University Bucheon Hospital, 1174 Jung-Dong, Wonmi-Gu, Bucheon 420-767, Korea.
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18
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Kang MS, Jeung KJ, Kim JH, Seo HS, Bang DW, Cho YH, Lee NH, Hyon MS, Kim SK, Kwan YJ. A Case Report of Recurrent Subacute Stent Thrombosis After Repetitive Percutaneous Coronary Interventions. Korean Circ J 2008. [DOI: 10.4070/kcj.2008.38.2.122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Affiliation(s)
- Myung Soo Kang
- Division of Cardiology, Department of Internal Medicine, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - Ki Ju Jeung
- Division of Cardiology, Department of Internal Medicine, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - Ji Hyeong Kim
- Division of Cardiology, Department of Internal Medicine, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - Hye-Sun Seo
- Division of Cardiology, Department of Internal Medicine, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - Duk Won Bang
- Division of Cardiology, Department of Internal Medicine, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - Yoon Haeng Cho
- Division of Cardiology, Department of Internal Medicine, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - Nae Hee Lee
- Division of Cardiology, Department of Internal Medicine, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - Min Su Hyon
- Division of Cardiology, Department of Internal Medicine, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - Sung Koo Kim
- Division of Cardiology, Department of Internal Medicine, Soonchunhyang University College of Medicine, Bucheon, Korea
| | - Young Joo Kwan
- Division of Cardiology, Department of Internal Medicine, Soonchunhyang University College of Medicine, Bucheon, Korea
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19
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Cho JY, Jeong MH, Ahn Y, Chae SC, Seong IH, Kim YJ, Yoon J, Rhew JY, Chae JK, Chae IH, Lee NH, Hwang JY, Cho MC, Kim KS, Kim CJ, Chung WS, Rha SW, Jang YS, Seung KB, Park SJ. Predictive Factors of Major Adverse Cardiac Events and Clinical Outcomes of Acute Myocardial Infarction in Young Korean Patients. Korean Circ J 2008. [DOI: 10.4070/kcj.2008.38.3.161] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Affiliation(s)
- Jae Yeong Cho
- Korea Acute Myocardial Infarction Registry of the Korean Society of Cardiology, Gwangju, Korea
| | - Myung Ho Jeong
- Korea Acute Myocardial Infarction Registry of the Korean Society of Cardiology, Gwangju, Korea
| | - Youngkeun Ahn
- Korea Acute Myocardial Infarction Registry of the Korean Society of Cardiology, Gwangju, Korea
| | - Shung Chull Chae
- Korea Acute Myocardial Infarction Registry of the Korean Society of Cardiology, Gwangju, Korea
| | - In Hwan Seong
- Korea Acute Myocardial Infarction Registry of the Korean Society of Cardiology, Gwangju, Korea
| | - Young Jo Kim
- Korea Acute Myocardial Infarction Registry of the Korean Society of Cardiology, Gwangju, Korea
| | - Junghan Yoon
- Korea Acute Myocardial Infarction Registry of the Korean Society of Cardiology, Gwangju, Korea
| | - Jay Young Rhew
- Korea Acute Myocardial Infarction Registry of the Korean Society of Cardiology, Gwangju, Korea
| | - Jei Keon Chae
- Korea Acute Myocardial Infarction Registry of the Korean Society of Cardiology, Gwangju, Korea
| | - In Ho Chae
- Korea Acute Myocardial Infarction Registry of the Korean Society of Cardiology, Gwangju, Korea
| | - Nae Hee Lee
- Korea Acute Myocardial Infarction Registry of the Korean Society of Cardiology, Gwangju, Korea
| | - Jin Yong Hwang
- Korea Acute Myocardial Infarction Registry of the Korean Society of Cardiology, Gwangju, Korea
| | - Myeong Chan Cho
- Korea Acute Myocardial Infarction Registry of the Korean Society of Cardiology, Gwangju, Korea
| | - Kee Sik Kim
- Korea Acute Myocardial Infarction Registry of the Korean Society of Cardiology, Gwangju, Korea
| | - Chong Jin Kim
- Korea Acute Myocardial Infarction Registry of the Korean Society of Cardiology, Gwangju, Korea
| | - Wook Sung Chung
- Korea Acute Myocardial Infarction Registry of the Korean Society of Cardiology, Gwangju, Korea
| | - Seung Woon Rha
- Korea Acute Myocardial Infarction Registry of the Korean Society of Cardiology, Gwangju, Korea
| | - Yang Soo Jang
- Korea Acute Myocardial Infarction Registry of the Korean Society of Cardiology, Gwangju, Korea
| | - Ki Bae Seung
- Korea Acute Myocardial Infarction Registry of the Korean Society of Cardiology, Gwangju, Korea
| | - Seung Jung Park
- Korea Acute Myocardial Infarction Registry of the Korean Society of Cardiology, Gwangju, Korea
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20
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Jeong HC, Ahn YK, Jeong MH, Chae SC, Kim JH, Seong IW, Kim YJ, Hur SH, Choi DH, Hong TJ, Yoon JH, Rhew JY, Chae JK, Kim DI, Chae IH, Koo BK, Kim BO, Lee NH, Hwang JY, Oh SK, Cho MC, Kim KS, Jeong KT, Lee MY, Kim CJ, Chung WS, Korea Acute Myocardial Infarction Registry Investigators. Intensive Pharmacologic Treatment in Patients With Acute Non ST-Segment Elevation Myocardial Infarction Who Did Not Undergo Percutaneous Coronary Intervention. Circ J 2008; 72:1403-9. [DOI: 10.1253/circj.cj-08-0048] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | | | | | | | - Jong Hyun Kim
- Heart Center of Chonnam National University Hospital
| | - In Whan Seong
- Heart Center of Chonnam National University Hospital
| | - Young Jo Kim
- Heart Center of Chonnam National University Hospital
| | - Seung Ho Hur
- Heart Center of Chonnam National University Hospital
| | | | | | - Jung Han Yoon
- Heart Center of Chonnam National University Hospital
| | | | - Jei Keon Chae
- Heart Center of Chonnam National University Hospital
| | - Doo Il Kim
- Heart Center of Chonnam National University Hospital
| | - In Ho Chae
- Heart Center of Chonnam National University Hospital
| | - Bon Kwon Koo
- Heart Center of Chonnam National University Hospital
| | - Byung Ok Kim
- Heart Center of Chonnam National University Hospital
| | - Nae Hee Lee
- Heart Center of Chonnam National University Hospital
| | | | - Seok Kyu Oh
- Heart Center of Chonnam National University Hospital
| | | | - Kee Sik Kim
- Heart Center of Chonnam National University Hospital
| | | | | | - Chong Jin Kim
- Heart Center of Chonnam National University Hospital
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Yim YK, Kang WC, Cho JH, Shin JW, Lee NH, Choi SM, Koo ST, Park KS, Son CG. Crossover clinical trial to determine the effect of manual acupuncture at Siguan points (bilateral LI4 and LR3) on intestinal motility in healthy subjects. Am J Chin Med 2007; 35:209-18. [PMID: 17436362 DOI: 10.1142/s0192415x07004758] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
This study examined whether manual acupuncture at the Siguan points (bilateral points LI4 and LR3) affects intestinal motility in healthy human subjects. Twenty healthy male subjects were randomly assigned either to real acupuncture (RA) at Siguan points or sham acupuncture (SA) groups in a crossover manner. All subjects underwent two experimental sessions; the RA group in the first session was treated with SA in the second session after a 2-week washout period, and vice versa. Each subject took 20 radio-markers and was treated with acupuncture 0, 12, 24, and 36 hours after radio-marker intake. Radiographs were taken at 6, 12.5, 24.5, and 48 hours, and the effect of acupuncture on intestinal motility was evaluated based on the distribution of the radio-markers in the ileum, ascending colon, transverse colon, descending colon, sigmoid/ rectum, and outside the body. Defecating habit was monitored during the trial, and complete blood counts were checked before and after the two acupuncture sessions. The RA and SA results showed extremely similar distributions of the radio-markers in these five regions of the alimentary canal and outside the body in radiographs taken at four different times, verifying that there was no effect of manual acupuncture at the Siguan points on intestinal motility, at least in healthy human subjects.
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Affiliation(s)
- Y K Yim
- Department of Meridian and Acupoint, College of Oriental Medicine, Daejeon University, Daejeon 300-716, South Korea
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Abstract
To understand most cellular processes, one must understand how genetic information is processed. A formidable challenge is the dissection of gene regulatory networks to delineate how eukaryotic cells coordinate and govern patterns of gene expression that ultimately lead to a phenotype. In this paper, we review several approaches for modeling eukaryotic gene regulatory networks and for reverse engineering such networks from experimental observations. Since we are interested in elucidating the transcriptional regulatory mechanisms of colon cancer progression, we use this important biological problem to illustrate various aspects of modeling gene regulation. We discuss four important models: gene networks, transcriptional regulatory systems, Boolean networks, and dynamical Bayesian networks. We review state-of-the-art functional genomics techniques, such as gene expression profiling, cis-regulatory element identification, TF target gene identification, and gene silencing by RNA interference, which can be used to extract information about gene regulation. We can employ this information, in conjunction with appropriately designed reverse engineering algorithms, to construct a computational model of gene regulation that sufficiently predicts experimental observations. In the last part of this review, we focus on the problem of reverse engineering transcriptional regulatory networks by gene perturbations. We mathematically formulate this problem and discuss the role of experimental resolution in our ability to reconstruct accurate models of gene regulation. We conclude, by discussing a promising approach for inferring a transcriptional regulatory system from microarray data obtained by gene perturbations.
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Affiliation(s)
- J Goutsias
- Whitaker Biomedical Engineering Institute, The Johns Hopkins University, Baltimore, MD 21218, USA.
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23
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Han SY, Chang EJ, Choi HJ, Nam SI, Lee NH, Kwak CS, Park SB, Kim HC, Mun KC. Total antioxidant status and oxygen free radicals during hepatic regeneration. Transplant Proc 2006; 38:2214-5. [PMID: 16980046 DOI: 10.1016/j.transproceed.2006.07.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVES The damage induced by oxygen free radicals (OFRs) is caused by an imbalance of the production of versus the antioxidant defenses against OFRs. METHODS To understand hepatic damage induced by oxygen free radicals after hepatectomy in rats, total antioxidant status and total production of oxygen free radicals were serially measured in regeneration liver. At 1, 2, 3, 7, and 10 days after hepatectomy of Sprague-Dawley rats, blood was obtained into a capillary tube from a tail vein. Total antioxidant status and total production of oxygen free radicals were measured using the Randox kit, a colorimetric method, and the Free Radical Analytical System. We also measured the amount of malonyldialdehyde, which provides an indirect index of oxidative injury. RESULTS The level of malonyldialdehyde after hepatectomy was higher compared with that before hepatectomy. The level of total oxygen free radicals after hepatectomy was higher compared with that before hepatectomy. Total antioxidant status after hepatectomy was lower compared with that before hepatectomy. CONCLUSIONS The results suggested that the damage by OFRs to the regenerating liver was caused by increased production of OFRs and decreased antioxidant defense against OFRs.
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Affiliation(s)
- S Y Han
- Dongsan Kidney Institute and Chronic Disease Research Center, Keimyung University School of Medicine, 194 Dong San Dong, Daegu 700-712, Korea
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24
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Teramoto H, Miwa H, Patel V, Letwin N, Castellone MD, Imai N, Shikami M, Imamura A, Gutkind JS, Nitta M, Lee NH. Gene expression changes in a patient presenting nonleukaemic nasal granulocytic sarcoma to acute myelogenous leukaemia using 40 K cDNA microarray. ACTA ACUST UNITED AC 2006; 28:262-6. [PMID: 16898967 DOI: 10.1111/j.1365-2257.2006.00803.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This is a case report of granulocytic sarcoma occurring as a nasal lesion prior to the onset of acute myelogenous leukaemia (AML). To understand this case in more detail, we used 40,000 human cDNA microarray to identify the gene expression patterns of nonleukaemic stage bone marrow (BM), AML stage BM and AML stage peripheral blood cells and subsequently define the molecular basis of this disease progression. Of significance, we have tracked the expression profile of BM samples during the course of nonleukaemic to leukaemic progression, and identified a number of genes that may account for the growth potential of leukaemia cells and indicate poor prognosis of this case.
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Affiliation(s)
- H Teramoto
- Department of Internal Medicine, Kojin Hospital, Nagoya, Japan
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25
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Lee NH, Kim SH, Youk GU, Park IJ, Kim YM. Development of a pMOSFET sensor with a Gd converter for low energy neutron dosimetry. Radiat Prot Dosimetry 2004; 110:277-281. [PMID: 15353659 DOI: 10.1093/rpd/nch159] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A pMOSFET having a 10 microm thick Gadolinium (Gd) layer has been invented as a slow neutron sensor. When slow neutrons are incident to the Gd layer, conversion electrons, which generate electron-hole pairs in the SiO2 layer of the pMOSFET, are generated by a neutron capture process. The holes are easily trapped in the oxide and act as positive-charge centres in the oxide. Due to the induced charges, the threshold turn-on voltage of the pMOSFET is changed. The developed sensors were tested at a neutron beam port of the HANARO research reactor and a 60Co irradiation facility to investigate slow neutron response and gamma ray contamination, respectively. The resultant voltage change was proportional to the accumulated neutron dose and it was very sensitive to slow neutrons. Moreover, ionising radiation contamination was negligible. It can also be used in a mixed radiation field by subtracting the voltage change of a pMOSFET without Gd from that of the Gd-pMOSFET.
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Affiliation(s)
- N H Lee
- Korea Atomic Energy Research Institute, Taejon, South Korea.
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26
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Kwon SH, On YK, Han DH, Lee SC, Jo YH, Lee NH, Hyun MS, Kim SK, Kwon YJ. Usefulness of B-type Natriuretic Peptide in Congestive Heart Failure. Korean Circ J 2003. [DOI: 10.4070/kcj.2003.33.8.695] [Citation(s) in RCA: 2] [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: 11/11/2022] Open
Affiliation(s)
- Soon Hyo Kwon
- Department of Internal Medicine, College of Medicine, Soonchunhyang University, Seoul, Korea
| | - Young Keun On
- Department of Internal Medicine, College of Medicine, Soonchunhyang University, Seoul, Korea
| | - Dae Hee Han
- Department of Internal Medicine, College of Medicine, Soonchunhyang University, Seoul, Korea
| | - Sang Chul Lee
- Department of Internal Medicine, College of Medicine, Soonchunhyang University, Seoul, Korea
| | - Yoon Hang Jo
- Department of Internal Medicine, College of Medicine, Soonchunhyang University, Seoul, Korea
| | - Nae Hee Lee
- Department of Internal Medicine, College of Medicine, Soonchunhyang University, Seoul, Korea
| | - Min Su Hyun
- Department of Internal Medicine, College of Medicine, Soonchunhyang University, Seoul, Korea
| | - Sung Koo Kim
- Department of Internal Medicine, College of Medicine, Soonchunhyang University, Seoul, Korea
| | - Young Joo Kwon
- Department of Internal Medicine, College of Medicine, Soonchunhyang University, Seoul, Korea
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27
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Abstract
Abciximab has a key role in the treatment of patients with acute coronary syndromes undergoing percutaneous coronary intervention; however, an increased risk of bleeding complications is well recognized. We report a case of serious pulmonary hemorrhage after use of abciximab therapy. A definitive indication and treatment guideline should be available to minimize serious bleeding complications. Additionally, respiratory symptoms should be monitored closely for early detection of serious pulmonary hemorrhage in patients receiving abciximab therapy during percutaneous coronary intervention.
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28
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Hegde P, Qi R, Gaspard R, Abernathy K, Dharap S, Earle-Hughes J, Gay C, Nwokekeh NU, Chen T, Saeed AI, Sharov V, Lee NH, Yeatman TJ, Quackenbush J. Identification of tumor markers in models of human colorectal cancer using a 19,200-element complementary DNA microarray. Cancer Res 2001; 61:7792-7. [PMID: 11691794] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
Metastasis represents a crucial transition in disease development and progression and has a profound impact on survival for a wide variety of cancers. Cell line models of metastasis have played an important role in developing our understanding of the metastatic process. We used a 19,200-element human cDNA microarray to profile transcription in three paired cell-line models of colorectal tumor metastasis. By correlating expression patterns across these cell lines, we have identified 176 genes that appear to be differentially expressed (greater than 2-fold) in all highly metastatic cell lines relative to their reference. An analysis of these genes reiterates much of our understanding of the metastatic process and suggests additional genes, many of previously uncharacterized function, that may be causatively involved in, or at least prognostic of, metastasis. Northern analysis of a limited number of these genes validates the observed pattern of expression and suggests that further investigation and functional characterization of the identified genes is warranted.
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Affiliation(s)
- P Hegde
- The Institute for Genomic Research, Rockville, Maryland 20850, USA
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29
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Miller LD, Park KS, Guo QM, Alkharouf NW, Malek RL, Lee NH, Liu ET, Cheng SY. Silencing of Wnt signaling and activation of multiple metabolic pathways in response to thyroid hormone-stimulated cell proliferation. Mol Cell Biol 2001; 21:6626-39. [PMID: 11533250 PMCID: PMC99808 DOI: 10.1128/mcb.21.19.6626-6639.2001] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
To investigate the transcriptional program underlying thyroid hormone (T3)-induced cell proliferation, cDNA microarrays were used to survey the temporal expression profiles of 4,400 genes. Of 358 responsive genes identified, 88% had not previously been reported to be transcriptionally or functionally modulated by T3. Partitioning the genes into functional classes revealed the activation of multiple pathways, including glucose metabolism, biosynthesis, transcriptional regulation, protein degradation, and detoxification in T3-induced cell proliferation. Clustering the genes by temporal expression patterns provided further insight into the dynamics of T3 response pathways. Of particular significance was the finding that T3 rapidly repressed the expression of key regulators of the Wnt signaling pathway and suppressed the transcriptional downstream elements of the beta-catenin-T-cell factor complex. This was confirmed biochemically, as beta-catenin protein levels also decreased, leading to a decrease in the transcriptional activity of a beta-catenin-responsive promoter. These results indicate that T3-induced cell proliferation is accompanied by a complex coordinated transcriptional reprogramming of many genes in different pathways and that early silencing of the Wnt pathway may be critical to this event.
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Affiliation(s)
- L D Miller
- Section of Molecular Signaling and Oncogenesis, Medicine Branch, Division of Clinical Sciences, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892-4255, USA
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30
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Flores-Morales A, Ståhlberg N, Tollet-Egnell P, Lundeberg J, Malek RL, Quackenbush J, Lee NH, Norstedt G. Microarray analysis of the in vivo effects of hypophysectomy and growth hormone treatment on gene expression in the rat. Endocrinology 2001; 142:3163-76. [PMID: 11416039 DOI: 10.1210/endo.142.7.8235] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Complementary DNA microarrays containing 3000 different rat genes were used to study the consequences of severe hormonal deficiency (hypophysectomy) on the gene expression patterns in heart, liver, and kidney. Hybridization signals were seen from a majority of the arrayed complementary DNAs; nonetheless, tissue-specific expression patterns could be delineated. Hypophysectomy affected the expression of genes involved in a variety of cellular functions. Between 16-29% of the detected transcripts from each tissue changed expression level as a reaction to this condition. Chronic treatment of hypophysectomized animals with human GH also caused significant changes in gene expression patterns. The study confirms previous knowledge concerning certain gene expression changes in the above-mentioned situations and provides new information regarding hypophysectomy and chronic human GH effects in the rat. Furthermore, we have identified several new genes that respond to GH treatment. Our results represent a first step toward a more global understanding of gene expression changes in states of hormonal deficiency.
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Affiliation(s)
- A Flores-Morales
- Department of Molecular Medicine, Karolinska Institute, 17176 Stockholm, Sweden
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Ryu G, Park EK, Joo JH, Lee BH, Choi BW, Jung DS, Lee NH. A new antioxidant monoterpene glycoside, alpha-benzoyloxypaeoniflorin from Paeonia suffruticosa. Arch Pharm Res 2001; 24:105-8. [PMID: 11339628 DOI: 10.1007/bf02976476] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [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: 10/21/2022]
Abstract
Alpha-benzoyloxypaeoniflorin (1), a new antioxidant monoterpene alpha-glycoside anomer was isolated from Paeonia suffruticosa along with known compounds, beta-benzoyloxypaeoniflorin (2), paeonolide, paeoniflorin and mudanpioside H. The structure of 1 has been determined by comparing spectral data with those of beta-benzoyloxypaeoniflorin (2). Compound 1 exhibited moderately potent radical scavenging activity on DPPH radical.
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Affiliation(s)
- G Ryu
- Regional Research Center, Hanbat National University, Taejon, Korea
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32
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Malek RL, Toman RE, Edsall LC, Wong S, Chiu J, Letterle CA, Van Brocklyn JR, Milstien S, Spiegel S, Lee NH. Nrg-1 belongs to the endothelial differentiation gene family of G protein-coupled sphingosine-1-phosphate receptors. J Biol Chem 2001; 276:5692-9. [PMID: 11069896 DOI: 10.1074/jbc.m003964200] [Citation(s) in RCA: 87] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The previously cloned rat nerve growth factor-regulated G protein-coupled receptor NRG-1 (Glickman, M., Malek, R. L., Kwitek-Black, A. E., Jacob, H. J., and Lee N. H. (1999) Mol. Cell. Neurosci. 14, 141-52), also known as EDG-8, binds sphingosine-1-phosphate (S1P) with high affinity and specificity. In this paper we examined the signal transduction pathways regulated by the binding of S1P to EDG-8. In Chinese hamster ovary cells heterologously expressing EDG-8, S1P inhibited forskolin-induced cAMP accumulation and activated c-Jun NH2-terminal kinase. Surprisingly, S1P inhibited serum-induced activation of extracellular regulated protein kinase 1 and 2 (ERK1/2). Treatment with pertussis toxin, which ADP-ribosylates and inactivates G(i), blocked S1P-mediated inhibition of cAMP accumulation, but had no effect on c-Jun NH2-terminal kinase activation or inhibition of ERK1/2. The inhibitory effect of S1P on ERK1/2 activity was abolished by treatment with orthovanadate, suggesting the involvement of a tyrosine phosphatase. A subunit selective [35S] guanosine 5'-3-O-(thio)triphosphate binding assay demonstrates that EDG-8 activated G(i/o) and G12 but not Gs and G(q/11) in response to S1P. In agreement, EDG-8 did not stimulate phosphoinositide turnover or cAMP accumulation. The ability of S1P to induce mitogenesis in cells expressing the EDG-1 subfamily of G protein-coupled receptors is well characterized. In contrast, S1P inhibited proliferation in Chinese hamster ovary cells expressing EDG-8 but not empty vector. The antiproliferative effect, like S1P-mediated ERK1/2 inhibition, was orthovanadate-sensitive and pertussis toxin-insensitive. Our results indicate that EDG-8, a member of the EDG-1 subfamily, couples to unique signaling pathways.
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Affiliation(s)
- R L Malek
- Department of Molecular and Cellular Biology, Institute for Genomic Research, Rockville, Maryland 20850, USA
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Kawai J, Shinagawa A, Shibata K, Yoshino M, Itoh M, Ishii Y, Arakawa T, Hara A, Fukunishi Y, Konno H, Adachi J, Fukuda S, Aizawa K, Izawa M, Nishi K, Kiyosawa H, Kondo S, Yamanaka I, Saito T, Okazaki Y, Gojobori T, Bono H, Kasukawa T, Saito R, Kadota K, Matsuda H, Ashburner M, Batalov S, Casavant T, Fleischmann W, Gaasterland T, Gissi C, King B, Kochiwa H, Kuehl P, Lewis S, Matsuo Y, Nikaido I, Pesole G, Quackenbush J, Schriml LM, Staubli F, Suzuki R, Tomita M, Wagner L, Washio T, Sakai K, Okido T, Furuno M, Aono H, Baldarelli R, Barsh G, Blake J, Boffelli D, Bojunga N, Carninci P, de Bonaldo MF, Brownstein MJ, Bult C, Fletcher C, Fujita M, Gariboldi M, Gustincich S, Hill D, Hofmann M, Hume DA, Kamiya M, Lee NH, Lyons P, Marchionni L, Mashima J, Mazzarelli J, Mombaerts P, Nordone P, Ring B, Ringwald M, Rodriguez I, Sakamoto N, Sasaki H, Sato K, Schönbach C, Seya T, Shibata Y, Storch KF, Suzuki H, Toyo-oka K, Wang KH, Weitz C, Whittaker C, Wilming L, Wynshaw-Boris A, Yoshida K, Hasegawa Y, Kawaji H, Kohtsuki S, Hayashizaki Y. Functional annotation of a full-length mouse cDNA collection. Nature 2001; 409:685-90. [PMID: 11217851 DOI: 10.1038/35055500] [Citation(s) in RCA: 487] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The RIKEN Mouse Gene Encyclopaedia Project, a systematic approach to determining the full coding potential of the mouse genome, involves collection and sequencing of full-length complementary DNAs and physical mapping of the corresponding genes to the mouse genome. We organized an international functional annotation meeting (FANTOM) to annotate the first 21,076 cDNAs to be analysed in this project. Here we describe the first RIKEN clone collection, which is one of the largest described for any organism. Analysis of these cDNAs extends known gene families and identifies new ones.
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Affiliation(s)
- J Kawai
- Laboratory for Genome Exploration Research Group, RIKEN Genomic Sciences Center, Yokohama Institute, Kanagawa, Japan
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Jung SH, Lee BH, Kim YH, Lee SJ, Choi RK, Kim IJ, Lee NH, Goh CW, Lim DS, Hwang HK. A Case Report of Inoue Balloon Deformity Recognized during Percutaneous Mitral Valvuloplasty. Korean Circ J 2001. [DOI: 10.4070/kcj.2001.31.8.830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Affiliation(s)
- Sung Hoon Jung
- Department of Internal Medicine, Kyung Hee University Medical School, Seoul, Korea
| | - Byung Ho Lee
- Department of Internal Medicine, Kyung Hee University Medical School, Seoul, Korea
| | - Young Hee Kim
- Department of Internal Medicine, Kyung Hee University Medical School, Seoul, Korea
| | - Seung Joon Lee
- Department of Internal Medicine, Kyung Hee University Medical School, Seoul, Korea
| | - Rak Kyeong Choi
- Department of Internal Medicine, Kyung Hee University Medical School, Seoul, Korea
| | - In Jae Kim
- Department of Internal Medicine, Kyung Hee University Medical School, Seoul, Korea
| | - Nae Hee Lee
- Department of Internal Medicine, Kyung Hee University Medical School, Seoul, Korea
| | - Choong Won Goh
- Department of Internal Medicine, Kyung Hee University Medical School, Seoul, Korea
| | - Dal Soo Lim
- Department of Internal Medicine, Kyung Hee University Medical School, Seoul, Korea
| | - Hweung Kon Hwang
- Department of Internal Medicine, Kyung Hee University Medical School, Seoul, Korea
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Affiliation(s)
- In Won Kim
- Department of Internal Medicine, Sejong General Hospital, Puchon, Korea
| | - Seung Mook Jeung
- Department of Internal Medicine, Sejong General Hospital, Puchon, Korea
| | - Tae Kyeong Won
- Department of Internal Medicine, Sejong General Hospital, Puchon, Korea
| | - Rak Kyeong Choi
- Department of Internal Medicine, Sejong General Hospital, Puchon, Korea
| | - In Jae Kim
- Department of Internal Medicine, Sejong General Hospital, Puchon, Korea
| | - Nae Hee Lee
- Department of Internal Medicine, Sejong General Hospital, Puchon, Korea
| | - Dal Soo Lim
- Department of Internal Medicine, Sejong General Hospital, Puchon, Korea
| | - Hweung Kon Hwang
- Department of Internal Medicine, Sejong General Hospital, Puchon, Korea
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Guo QM, Malek RL, Kim S, Chiao C, He M, Ruffy M, Sanka K, Lee NH, Dang CV, Liu ET. Identification of c-myc responsive genes using rat cDNA microarray. Cancer Res 2000; 60:5922-8. [PMID: 11085504] [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: 02/18/2023]
Abstract
c-Myc functions through direct activation or repression of transcription. Using cDNA microarray analysis, we have identified c-Myc-responsive genes by comparing gene expression profiles between c-myc null and c-myc wild-type rat fibroblast cells and between c-myc null and c-myc null cells reconstituted with c-myc. From a panel of 4400 cDNA elements, we found 198 genes responsive to c-myc when comparing wild-type or reconstituted cells with the null cells. The plurality of the named c-Myc-responsive genes that were up-regulated, including 30 ribosomal protein genes, are involved in macromolecular synthesis and metabolism, suggesting a major role of c-Myc in the regulation of protein synthetic and metabolic pathways. When ectopically overexpressed, c-Myc induced a different and smaller set of c-Myc-responsive genes as compared with the physiologically expressed c-Myc condition. Thus, these results from expression profiling suggest a new primary function for c-Myc and raise the possibility that the physiological and transforming functions of c-myc may be separable.
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Affiliation(s)
- Q M Guo
- Molecular Signaling and Oncogenesis Section, Department of Cancer and Cell Biology, Medicine Branch, Division of Clinical Science, National Cancer Institute, Bethesda, Maryland 20892, USA
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Hong MK, Park SW, Lee NH, Nah DY, Lee CW, Kang DH, Song JK, Kim JJ, Park SJ. Long-term outcomes of minor dissection at the edge of stents detected with intravascular ultrasound. Am J Cardiol 2000; 86:791-5, A9. [PMID: 11018205 DOI: 10.1016/s0002-9149(00)01085-7] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
We evaluated the influences of minor edge dissections on late angiographic in-stent restenosis in 327 patients with 348 lesions (281 lesions without edge dissection and 67 lesions [19.3%] with edge dissection); the angiographic restenosis rate was 29.9% in the lesions with edge dissections versus 25.3% without edge dissections (p = 0.540). The minor non-flow-limiting dissections at the edge of stents may not be associated with the development of late angiographic in-stent restenosis.
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Affiliation(s)
- M K Hong
- Department of Internal Medicine, College of Medicine, University of Ulsan, Asan Medical Center, Seoul, Korea
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Abstract
This study evaluates the impact of cilostazol on post-stenting restenosis. Cilostazol is a potent antiplatelet agent with antiproliferative properties. Few data are available about the effect of cilostazol on poststenting restenosis. Four hundred nine patients (494 lesions) who were scheduled for elective stenting were randomized to receive aspirin plus ticlopidine (group I, n = 201, 240 lesions) or aspirin plus cilostazol (group II, n = 208, 254 lesions), starting 2 days before stenting. Ticlopidine was given for 1 month and cilostazol for 6 months. Follow-up angiography was performed at 6 months, and clinical evaluation at regular intervals. Baseline characteristics were similar between the 2 groups. The procedural success rate was 99.6% in group I and 100% in group II. There were no cases of stent thrombosis after stenting. Angiographic follow-up was performed in 380 of the 494 eligible lesions and the angiographic restenosis rate was 27% in group I and 22.9% in group II (p = NS). However, diffuse type in-stent restenosis was more common in group I than in group II (54.2% vs 26.8%, respectively, p <0.05). In diabetic patients, the angiographic restenosis rate was 50% in group I and 21.7% in group II (p <0.05). Clinical events during follow-up did not differ between the 2 groups. In conclusion, aspirin plus cilostazol seems to be an effective antithrombotic regimen with comparable results to aspirin plus ticlopidine, but it does not reduce the overall angiographic restenosis rate after elective coronary stenting.
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Affiliation(s)
- S W Park
- Department of Medicine, Asan Medical Center, University of Ulsan, Seoul, Korea
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39
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Abstract
Poromas have been classified as eccrine neoplasms, but several recent reports of poroid tumors with sebaceous, follicular, and apocrine differentiation have challenged this concept. We report a case of apocrine poroma with sebaceous differentiation. A 69-year-old man presented with an asymptomatic elevated erythematous plaque. Histopathology revealed cellular nests composed of cuboidal poroid cells and sebocytes. The nests varied in size and were entirely intraepidermally arranged in a growth pattern similar to that of hidroacanthoma simplex. Given the common embryologic origin of folliculosebaceous and apocrine units, we believe that this lesion represents an apocrine poroma with sebaceous differentiation.
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Affiliation(s)
- N H Lee
- Department of Dermatology, Yonsei University Wonju College of Medicine, Korea
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40
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Abstract
We report a case of cutaneous tuberculosis presenting as cellulitis. The patient was a 63-year-old Korean woman who also had diabetes mellitus and a 20-year-history of oral corticosteroid medication prescribed for arthralgia. In addition, she had had pulmonary tuberculosis 20-year previously for which she received systemic treatment for 1 year. Her clinical cellulitis failed to respond to antibiotic therapy. Subsequent investigations, using histopathology and polymerase chain reaction, established an alternative diagnosis of cutaneous tuberculosis. The skin eruption cleared after treatment with isoniazid, rifampicin, ethambutol and pyrazinamide. This case represents a most unusual presentation of tuberculosis in the skin. The atypical features may reflect the patient's general medical state.
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Affiliation(s)
- N H Lee
- Department of Dermatology, Yonsei University Wonju College of Medicine, Wonju, Korea
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41
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Abstract
The intravascular ultrasound (IVUS) criteria for stent optimization have not been determined in stenting long lesions. We evaluated the predictors of angiographic restenosis and compared it with stent lumen cross-sectional area (CSA) and stent length between short (stent length <20 mm) and long (> or =20 mm) coronary stenting. IVUS-guided coronary stenting was successfully performed in 285 consecutive patients with 304 native coronary lesions. Six-month follow-up angiogram was performed in 236 patients (82.8%) with 246 lesions (80.9%). Results were evaluated using conventional (clinical, angiographic, and IVUS) methods. The overall angiographic restenosis rate was 22.8% (56 of 246 lesions) (short stent 17.6% vs. long stent 32.2%, p = 0.009). Using multivariate logistic regression analysis, the independent predictors of angiographic restenosis were the IVUS stent lumen CSA (odds ratio 1.51, 95% confidence intervals 1.18 to 1.92, p = 0.001) and stent length (odds ratio 0.95, 95% confidence intervals 0.91 to 1.00, p = 0.039). The angiographic restenosis rate was 54.8% for stent lumen CSA of <5.0 mm2 (short stent 37.5% vs. long stent 73.3%, p = 0.049), 27.4% for CSA between 5.0 and 7.0 mm2 (short stent 24.1% vs. long stent 31.7%, p = 0.409), 10.5% for CSA between 7.0 and 9.0 mm2 (short stent 10.0% vs. long stent 12.5%, p = 0.772), and 11.4% for stent lumen CSA of > or =9.0 mm2 (short stent 10.4% vs. long stent 13.3%, p = 0.767) (p = 0.001). Compared with short coronary stenting, long coronary stenting is effective treatment modality to cover long lesions with comparable long-term clinical outcomes in cases of stent lumen CSA of > or =7.0 mm2. Regardless of the stent length, the most important factor determining angiographic restenosis was the IVUS stent lumen CSA in relatively large coronary artery lesions.
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Affiliation(s)
- M K Hong
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
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Nah DY, Lee DC, Park KU, Lee NH, Cho GY, Kim YH, Park CH. Assessment of Diastolic Function using Mitral Annulus Velocity by Doppler Tissue Velocity in the Patients with Hypertension. Korean Circ J 2000. [DOI: 10.4070/kcj.2000.30.9.1117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Affiliation(s)
- Deuk Young Nah
- Department of Internal Medicine, Kyung-Ju Hospital, Dongguk Medical Center, Univercity of Dongguk, Kyung-Ju, Korea
| | - Dong Chul Lee
- Department of Internal Medicine, Kyung-Ju Hospital, Dongguk Medical Center, Univercity of Dongguk, Kyung-Ju, Korea
| | - Keun Uk Park
- Department of Internal Medicine, Kyung-Ju Hospital, Dongguk Medical Center, Univercity of Dongguk, Kyung-Ju, Korea
| | - Nae Hee Lee
- Department of Internal Medicine, Kyung-Ju Hospital, Dongguk Medical Center, Univercity of Dongguk, Kyung-Ju, Korea
| | - Goo Yeong Cho
- Department of Internal Medicine, Kyung-Ju Hospital, Dongguk Medical Center, Univercity of Dongguk, Kyung-Ju, Korea
| | - You Ho Kim
- Department of Internal Medicine, Kyung-Ju Hospital, Dongguk Medical Center, Univercity of Dongguk, Kyung-Ju, Korea
| | - Chong Hun Park
- Department of Internal Medicine, Kyung-Ju Hospital, Dongguk Medical Center, Univercity of Dongguk, Kyung-Ju, Korea
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Cho GY, Song JK, Kang DH, Park HK, Park SS, Lee NH, Nah DY, Lee CW, Hong MK, Park SW, Park SJ. Noninvasive calculation of left heart compliance by echocardiography and its clinical significance in mitral stenosis. Korean Circ J 2000. [DOI: 10.4070/kcj.2000.30.3.303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Affiliation(s)
- Goo Yeong Cho
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Jae Kwan Song
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Duk Hyun Kang
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Hoon Ki Park
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Sang Sun Park
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Nae Hee Lee
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Deuk Young Nah
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Cheol Whan Lee
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Myeong Ki Hong
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Seong Wook Park
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Seung Jung Park
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
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Park SW, Hong MK, Lee CW, Kim JJ, Park HK, Lee NH, Cho GY, Nah DY, Kang DH, Song JK, Kim MK, Park SJ. Immediate and Late Clinical and Angiographic Outcomes after GFX Coronary Stenting: Is High-Pressure Balloon Dilatation Always Necessary? Korean Circ J 2000. [DOI: 10.4070/kcj.2000.30.2.125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Affiliation(s)
- Seong Wook Park
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Myeong Ki Hong
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Cheol Whan Lee
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Jae Joong Kim
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Hoon Ki Park
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Nae Hee Lee
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Goo Young Cho
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Deuk Young Nah
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Duk Hyun Kang
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Jae Kwan Song
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Min Kyu Kim
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Seung Jung Park
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
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45
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Lee NH, Hong MK, Park SW, Lee CW, Kim YH, Cho GY, Nah DY, Kang DH, Song JK, Kim JJ, Park SJ. Predictors of Angiographic Restenosis after Intracoronary Stenting according to Stent Lumen Cross Sectional Area and Stent Length in Native Coronary Artery Lesions: An Intravascular Ultrasound Study. Korean Circ J 2000. [DOI: 10.4070/kcj.2000.30.1.23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Affiliation(s)
- Nae Hee Lee
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Myeong Ki Hong
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Seong Wook Park
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Cheol Whan Lee
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Young Hak Kim
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Goo Young Cho
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Deuk Young Nah
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Duk Hyun Kang
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Jae Kwan Song
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Jae Joong Kim
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Seung Jung Park
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
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46
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Lee NH, Hong MK, Park SW, Lee CW, Kim YH, Cho GY, Nah DY, Kang DH, Song JK, Kim JJ, Park SJ. Chronic Stent Recoil of Different Design of Stents: An Intravascular Ultrasound Study. Korean Circ J 2000. [DOI: 10.4070/kcj.2000.30.1.16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Affiliation(s)
- Nae Hee Lee
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Myeong Ki Hong
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Seong Wook Park
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Cheol Whan Lee
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Young Hak Kim
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Goo Young Cho
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Deuk Young Nah
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Duk Hyun Kang
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Jae Kwan Song
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Jae Joong Kim
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
| | - Seung Jung Park
- Department of Internal Medicine, College of Medicine, University of Ulsan, Cardiovascular Center, Asan Medical Center, Seoul, Korea
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Malek RL, Nie Z, Ramkumar V, Lee NH. Adenosine A(2A) receptor mRNA regulation by nerve growth factor is TrkA-, Src-, and Ras-dependent via extracellular regulated kinase and stress-activated protein kinase/c-Jun NH(2)-terminal kinase. J Biol Chem 1999; 274:35499-504. [PMID: 10585422 DOI: 10.1074/jbc.274.50.35499] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We have shown previously that nerve growth factor (NGF) down-regulates adenosine A(2A) receptor (A(2A)AR) mRNA in PC12 cells. To define cellular mechanisms that modulate A(2A)AR expression, A(2A)AR mRNA and protein levels were examined in three PC12 sublines: i) PC12nnr5 cells, which lack the high affinity NGF receptor TrkA, ii) srcDN2 cells, which overexpress kinase-defective Src, and iii) 17.26 cells, which overexpress a dominant-inhibitory Ras. In the absence of functional TrkA, Src, or Ras, NGF-induced down-regulation of A(2A)AR mRNA and protein was significantly impaired. However, regulation of A(2A)AR expression was reconstituted in PC12nnr5 cells stably transfected with TrkA. Whereas NGF stimulated the mitogen-activated protein kinases p38, extracellular regulated kinase 1 and 2 (ERK1/ERK2), and stress-activated protein kinase/c-Jun NH(2)-terminal kinase (SAPK/JNK) in PC12 cells, these kinases were activated only partially or not at all in srcDN2 and 17.26 cells. Inhibiting ERK1/ERK2 with PD98059 or inhibiting SAPK/JNK by transfecting cells with a dominant-negative SAPKbeta/JNK3 mutant partially blocked NGF-induced down-regulation of A(2A)AR expression in PC12 cells. In contrast, inhibiting p38 with SB203580 had no effect on the regulation of A(2A)AR mRNA and protein levels. Treating SAPKbeta/JNK3 mutant-transfected PC12 cells with PD98059 completely abolished the NGF-induced decrease in A(2A)AR mRNA and protein levels. These results reveal a role for ERK1/ERK2 and SAPK/JNK in regulating A(2A)AR expression.
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Affiliation(s)
- R L Malek
- Department of Molecular and Cellular Biology, The Institute for Genomic Research, Rockville, Maryland 20850, USA
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48
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Nie Z, Mei Y, Malek RL, Marcuzzi A, Lee NH, Ramkumar V. A role of p75 in NGF-mediated down-regulation of the A(2A) adenosine receptors in PC12 cells. Mol Pharmacol 1999; 56:947-54. [PMID: 10531399 DOI: 10.1124/mol.56.5.947] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Nerve growth factor (NGF) induces differentiation of the rat pheochromocytoma clone (PC12) by activating the high affinity receptor, p140(trkA), linked to mitogen-activated protein kinase. While the physiological role of the low affinity NGF receptor (p75) has not been clearly defined, this receptor promotes activation of nuclear factor (NF) kappaB in Schwann cells. PC12 cells express the A(2A) adenosine receptor (AR), whose expression is significantly decreased by NGF treatment. In this study, we determined whether TrkA or p75 is involved in NGF-mediated regulation of A(2A)AR expression. NGF treatment decreased A(2A)AR in a time-dependent manner, with maximal effects observed by 1 day, and continued down-regulation of the receptor for up to 3 days in the presence of NGF. The decrease in A(2A)AR was associated with a more delayed decrease in the steady-state levels of the A(2A)AR mRNA. Down-regulation of the A(2A)AR at 1 day was mimicked by activators of NFkappaB, such as H(2)O(2), and ceramide, and was attenuated by the inhibitor pyrrolidine dithiocarbamate or following transient transfection of PC12 cells with a dominant negative IkappaBalpha mutant. Moreover, NGF stimulated nuclear accumulation of p65 subunits of NFkappaB (but not p50 subunits) in PC12 cells, as determined by electrophoretic mobility shift assays and by Western blotting. In contrast, inhibition of TrkA by AG879 or of TrkA-dependent mitogen-activated protein kinase mitogen-activated protein kinase kinase with PD98059 blocked PC12 cell differentiation without affecting A(2A)AR down-regulation, suggesting dissociation between these two phenomena. Taken together, these data provide strong support for the involvement of the p75/NFkappaB pathway in NGF-mediated down-regulation of A(2A)AR in PC12 cells.
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Affiliation(s)
- Z Nie
- Department of Pharmacology, Southern Illinois University School of Medicine, Springfield, Illinois 62794-9629, USA
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Abstract
A case of colonic duplication producing chronic constipation in a 8-year-old boy is presented. Barium enema studies demonstrated a long tubular shape of duplication that branched out from the lower part of descending colon. Successful surgical treatment was achieved by excision of the duplication with a portion of adjacent bowel and an end-to-end anastomosis.
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Affiliation(s)
- K S Shin
- Division of Pediatric Surgery, Taegu Fatima Hospital, Korea
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50
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Abstract
Two new 5-oxonoraporphines, 1 and 2, together with three known compounds, ouregidione, 3-methoxycepharadione B, and isoelemicin, have been isolated from the bark of Mitrephora cf. maingayi. Structures of 1 and 2 were determined to be 1,2,3-trimethoxy-5-oxonoraporphine and 1,2-dimethoxy-3-hydroxy-5-oxonoraporphine on the basis of NMR and MS studies.
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Affiliation(s)
- N H Lee
- Department of Chemistry, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260
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