154 results on '"Choi WG"'
Search Results
2. Estimating the discount rate policy reaction function of the monetary authority
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Choi, WG and Choi, WG
- Abstract
This paper estimates a policy rule that explains the sign and the magnitude of the Federal Reserve's (Fed's) discount rate changes. It sets out a two-sided Type II Tobit model and develops a procedure for its estimation, considering the discrete and censored nature of the changes. The results suggest that the Fed has conducted discount rate policy counter-cyclically to influence output and to curb inflation, and that the Fed's response to policy indicators varies over monetary regimes. Furthermore, consistency is found between the model prediction of the discount rate change and a classification based on whether the change is technical or non-technical. Copyright (C) 1999 John Wiley & Sons, Ltd.
- Published
- 1999
3. Unipedicular vertebroplasty for osteoporotic compression fracture using an individualized needle insertion angle.
- Author
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Chang WS, Lee SH, Choi WG, Choi G, and Jo BJ
- Published
- 2007
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4. Primary diffuse large B cell lymphoma of the base of tongue.
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Lim JH, Lim JY, Kim YM, Kim CS, Choi SJ, Yi HG, Choi WG, and Lee MH
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- 2012
5. Interstitial lung disease associated with FOLFOX chemotherapy.
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Lim JH, Kim H, Choi WG, and Lee MH
- Published
- 2010
6. Therapeutic Effects of Zanthoxyli Pericarpium on Intestinal Inflammation and Network Pharmacological Mechanism Analysis in a Dextran Sodium Sulfate-Induced Colitis Mouse Model.
- Author
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Choi WG, Ko SJ, Jung D, Kim SC, Choi NR, Park JW, and Kim BJ
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- Animals, Mice, PPAR gamma metabolism, Oxidative Stress drug effects, Network Pharmacology, Colon drug effects, Colon pathology, Colon metabolism, Cyclooxygenase 2 metabolism, Male, Nitric Oxide Synthase Type II metabolism, Nitric Oxide Synthase Type II genetics, Receptors, G-Protein-Coupled metabolism, Receptors, G-Protein-Coupled genetics, Mice, Inbred C57BL, Tyrosine analogs & derivatives, Tyrosine metabolism, Medicine, Chinese Traditional methods, Inflammatory Bowel Diseases drug therapy, Inflammatory Bowel Diseases chemically induced, Dextran Sulfate, Colitis chemically induced, Colitis drug therapy, Disease Models, Animal, Anti-Inflammatory Agents pharmacology, Antioxidants pharmacology, Drugs, Chinese Herbal pharmacology
- Abstract
(1) Background: IBD (inflammatory bowel disease) is characterized by chronic intestinal inflammation leading to persistent symptoms and a lack of effective treatments. ZP ( Zanthoxyli Pericarpium ) has been used in traditional Chinese medicine for its anti-inflammatory and antioxidant properties for the management of intestinal disorders. (2) Methods: This study aimed to investigate the components of ZP, their specific targets, and associated diseases using the TCMSP (Traditional Chinese Medicine Systems Pharmacology) analysis platform, TCMBank database, and ETCM2.0 (Encyclopedia of Traditional Chinese Medicine 2.0) database. Additionally, we explored the protective effects of ZP on the colon and the underlying molecular mechanisms in the treatment of IBD. (3) Results: We identified 59 compounds in ZP that target 38 genes related to IBD, including PTGS2, PPARG, and GPBAR1. In a mice model of DSS (dextran sodium sulfate)-induced colitis, ZP significantly reduced colonic epithelial damage and oxidative stress markers, such as iNOS and nitrotyrosine, demonstrating its antioxidant properties. (4) Conclusions: These findings suggest that ZP has protective effects against DSS-induced colonic damage owing to its anti-inflammatory and antioxidant properties, making it a potential candidate for IBD treatment. However, further research and clinical trials are required to confirm its therapeutic potential and safety in humans.
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- 2024
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7. Study on the Therapeutic Effects and Mechanisms of Gintonin in Irritable Bowel Syndrome and Its Relationship with TRPV1, TRPV4, and NaV1.5.
- Author
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Choi NR, Ko SJ, Nam JH, Choi WG, Lee JH, Nah SY, Park JW, and Kim BJ
- Abstract
Irritable bowel syndrome (IBS) is a gastrointestinal (GI) disease accompanied by changes in bowel habits without any specific cause. Gintonin is a newly isolated glycoprotein from ginseng that is a lysophosphatidic acid (LPA) receptor ligand. To investigate the efficacy and mechanisms of action of gintonin in IBS, we developed a zymosan-induced IBS murine model. In addition, electrophysiological experiments were conducted to confirm the relevance of various ion channels. In mice, gintonin restored colon length and weight to normal and decreased stool scores, whilst food intake remained constant. Colon mucosal thickness and inflammation-related tumor necrosis factor-α levels were decreased by gintonin, along with a reduction in pain-related behaviors. In addition, the fecal microbiota from gintonin-treated mice had relatively more Lactobacillaceae and Lachnospiraceae and less Bacteroidaceae than microbiota from the control mice. Moreover, gintonin inhibited transient receptor potential vanilloid (TRPV) 1 and TRPV4 associated with visceral hypersensitivity and voltage-gated Na
+ 1.5 channels associated with GI function. These results suggest that gintonin may be one of the effective components in the treatment of IBS.- Published
- 2024
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8. Effect of hemoglobin A1c change on 24-month clinical outcomes in patients with diabetes after acute myocardial infarction.
- Author
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Park S, Choi WG, Bae DH, Kim M, Lee JH, Kim S, Bae JW, Kim DW, Cho MC, Kim CJ, Chae SC, Jeong MH, and Hwang KK
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- Humans, Male, Female, Middle Aged, Republic of Korea epidemiology, Aged, Time Factors, Risk Factors, Patient Readmission statistics & numerical data, Blood Glucose metabolism, Glycemic Control methods, Treatment Outcome, Glycated Hemoglobin metabolism, Myocardial Infarction blood, Registries, Diabetes Mellitus blood, Diabetes Mellitus epidemiology, Biomarkers blood
- Abstract
Background: The average glycated hemoglobin (HbA1c) may not accurately reflect glycemic control status during the mid-term after acute myocardial infarction (AMI). We aimed to evaluate changes in HbA1c and their effect on mid-term clinical outcomes in patients with diabetes and AMI., Methods: We enrolled patients with diabetes ( n = 967) who underwent HbA1c measurement in the Korean nationwide registry. These patients were categorized into three groups based on changes in HbA1c from index admission to the 1-year follow-up visit: a decrease in HbA1c > 1%, changes in HbA1c within 1%, and an increase in HbA1c > 1%. Clinical outcomes at 24 months were examined., Results: The baseline HbA1c levels were 8.55 ± 0.85, 7.00 ± 0.98 and 7.07 ± 1.05 ( P = 0.001) and HbA1c levels after 1 year were 6.62 ± 0.73, 7.05 ± 0.98 and 9.26 ± 1.59 ( P = 0.001) for patients with 3 groups, respectively. Patients with a 1% decrease in HbA1c had significantly lower incidence of major adverse cardiovascular events (MACE), cardiac death, and rehospitalization after 24 months than those with a 1% increase in HbA1c. However, in the Cox regression analysis, a >1% decrease in HbA1c change was not an independent factor for MACE, cardiac death, and rehospitalization., Conclusions: Our analysis indicates that an HbA1c decrease of >1% within the first 12 months was not an independent prognostic factor until the 24-month mark. Therefore, standard diabetic control is recommended for patients with diabetes and AMI for up to 2 years., (Copyright © 2024 Wolters Kluwer Health, Inc. All rights reserved.)
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- 2024
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9. Balloon-expandable cobalt chromium stent versus self-expandable nitinol stent for the Atherosclerotic Iliac Arterial Disease (SENS-ILIAC Trial) Trial: a randomized controlled trial.
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Choi WG, Rha SW, Choi BG, Park S, Kim JB, Kang DO, Choi CU, Seo YS, Cho YH, Park SH, Lee SJ, Ko YG, Her AY, Kim SM, Kim KC, Cho JH, Kang WY, Kim JH, Kim MW, Kim DH, Bae JH, Ahn JH, Jo SC, Seo JB, Jung WY, and Park SM
- Subjects
- Humans, Male, Female, Aged, Republic of Korea, Treatment Outcome, Middle Aged, Chromium Alloys, Prospective Studies, Time Factors, Iliac Artery diagnostic imaging, Iliac Artery physiopathology, Prosthesis Design, Vascular Patency, Alloys, Angioplasty, Balloon instrumentation, Angioplasty, Balloon methods, Angioplasty, Balloon adverse effects, Peripheral Arterial Disease physiopathology, Peripheral Arterial Disease therapy, Peripheral Arterial Disease diagnosis, Self Expandable Metallic Stents
- Abstract
Iliac artery angioplasty with stenting is an effective alternative treatment modality for aortoiliac occlusive diseases. Few randomized controlled trials have compared the efficacy and safety between self-expandable stent (SES) and balloon-expandable stent (BES) in atherosclerotic iliac artery disease. In this randomized, multicenter study, patients with common or external iliac artery occlusive disease were randomly assigned in a 1:1 ratio to either BES or SES. The primary end point was the 1-year clinical patency, defined as freedom from any surgical or percutaneous intervention due to restenosis of the target lesion after the index procedure. The secondary end point was a composite event from major adverse clinical events at 1 year. A total of 201 patients were enrolled from 17 major cardiovascular intervention centers in South Korea. The mean age of the enrolled patients was 66.8 ± 8.5 years and 86.2% of the participants were male. The frequency of critical limb ischemia was 15.4%, and the most common target lesion was in the common iliac artery (75.1%). As the primary end point, the 1-year clinical patency as primary end point was 99% in the BES group and 99% in the SES group (p > 0.99). The rate of repeat revascularization at 1 year was 7.8% in the BES group and 7.0% in the SES group (p = 0.985; confidence interval, 1.011 [0.341-2.995]). In our randomized study, the treatment of iliac artery occlusive disease with self-expandable versus balloon-expandable stent was comparable in 12-month clinical outcomes without differences in the procedural success or geographic miss rate regardless of the deployment method in the distal aortoiliac occlusive lesion (ClinicalTrials.gov, NCT01834495)., Competing Interests: Declarations Conflict of interest The authors declare no competing interests., (© 2024. Springer Nature Japan KK, part of Springer Nature.)
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- 2024
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10. Atractylodes macrocephala Koidz Alleviates Symptoms in Zymosan-Induced Irritable Bowel Syndrome Mouse Model through TRPV1, NaV1.5, and NaV1.7 Channel Modulation.
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Choi NR, Choi WG, Lee JH, Park J, Kim YT, Das R, Woo JH, and Kim BJ
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- Animals, Mice, Male, Plant Extracts pharmacology, NAV1.7 Voltage-Gated Sodium Channel metabolism, Colon drug effects, Colon metabolism, Colon pathology, Intestinal Mucosa metabolism, Intestinal Mucosa drug effects, Irritable Bowel Syndrome drug therapy, Irritable Bowel Syndrome chemically induced, TRPV Cation Channels metabolism, Disease Models, Animal, Zymosan, Atractylodes chemistry
- Abstract
(1) Background: Irritable bowel syndrome (IBS) is a common disease in the gastrointestinal (GI) tract. Atractylodes macrocephala Koidz (AMK) is known as one of the traditional medicines that shows a good efficacy in the GI tract. (2) Methods: We investigated the effect of AMK in a network pharmacology and zymosan-induced IBS animal model. In addition, we performed electrophysiological experiments to confirm the regulatory mechanisms related to IBS. (3) Results: Various characteristics of AMK were investigated using TCMSP data and various analysis systems. AMK restored the macroscopic changes and weight to normal. Colonic mucosa and inflammatory factors were reduced. These effects were similar to those of amitriptyline and sulfasalazine. In addition, transient receptor potential (TRP) V1, voltage-gated Na
+ (NaV) 1.5, and NaV1.7 channels were inhibited. (4) Conclusion: These results suggest that AMK may be a promising therapeutic candidate for IBS management through the regulation of ion channels.- Published
- 2024
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11. Cytoplasmic Ca 2+ influx mediates iron- and reactive oxygen species-dependent ferroptotic cell death in rice immunity.
- Author
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Wang J, Choi WG, Nguyen NK, Liu D, Kim SH, Lim D, Hwang BK, and Jwa NS
- Abstract
Iron- and reactive oxygen species (ROS)-dependent ferroptosis occurs in plant cells. Ca
2+ acts as a conserved key mediator to control plant immune responses. Here, we report a novel role of cytoplasmic Ca2+ influx regulating ferroptotic cell death in rice immunity using pharmacological approaches. High Ca2+ influx triggered iron-dependent ROS accumulation, lipid peroxidation, and subsequent hypersensitive response (HR) cell death in rice ( Oryza sativa ). During Magnaporthe oryzae infection, 14 different Ca2+ influx regulators altered Ca2+ , ROS and Fe2+ accumulation, glutathione reductase ( GR ) expression, glutathione (GSH) depletion and lipid peroxidation, leading to ferroptotic cell death in rice. High Ca2+ levels inhibited the reduction of glutathione isulphide (GSSG) to GSH in vitro . Ca2+ chelation by ethylene glycol-bis (2-aminoethylether)- N, N, N', N' -tetra-acetic acid (EGTA) suppressed apoplastic Ca2+ influx in rice leaf sheaths during infection. Blocking apoplastic Ca2+ influx into the cytoplasm by Ca2+ chelation effectively suppressed Ca2+ -mediated iron-dependent ROS accumulation and ferroptotic cell death. By contrast, acibenzolar- S -methyl (ASM), a plant defense activator, significantly enhanced Ca2+ influx, as well as ROS and iron accumulation to trigger ferroptotic cell death in rice. The cytoplasmic Ca2+ influx through calcium-permeable cation channels, including the putative resistosomes, could mediate iron- and ROS-dependent ferroptotic cell death under reduced GR expression levels in rice immune responses., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. The author(s) declared that they were an editorial board member of Frontiers, at the time of submission. This had no impact on the peer review process and the final decision., (Copyright © 2024 Wang, Choi, Nguyen, Liu, Kim, Lim, Hwang and Jwa.)- Published
- 2024
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12. Lower Atrial Fibrillation Risk With Sodium-Glucose Cotransporter 2 Inhibitors Than With Dipeptidyl Peptidase-4 Inhibitors in Individuals With Type 2 Diabetes: A Nationwide Cohort Study.
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Kim M, Ha KH, Lee J, Park S, Oh KS, Bae DH, Lee JH, Kim SM, Choi WG, Hwang KK, Kim DW, Cho MC, Kim DJ, and Bae JW
- Abstract
Background and Objectives: Accumulating evidence shows that sodium-glucose cotransporter 2 inhibitors (SGLT2is) reduce adverse cardiovascular outcomes. However, whether SGLT2i, compared with other antidiabetic drugs, reduce the new development of atrial fibrillation (AF) is unclear. In this study, we compared SGLT2i with dipeptidyl peptidase-4 inhibitors (DPP-4is) in terms of reduction in the risk of AF in individuals with type 2 diabetes., Methods: We included 42,786 propensity score-matched pairs of SGLT2i and DPP-4i users without previous AF diagnosis using the Korean National Health Insurance Service database between May 1, 2016, and December 31, 2018., Results: During a median follow-up of 1.3 years, SGLT2i users had a lower incidence of AF than DPP-4i users (1.95 vs. 2.65 per 1,000 person-years; hazard ratio [HR], 0.73; 95% confidence interval [CI], 0.55-0.97; p=0.028]). In individuals without heart failure, SGLT2i users was associated with a decreased risk of AF incidence (HR, 0.70; 95% CI, 0.52-0.94; p=0.019) compared to DPP-4i users. However, individuals with heart failure, SGLT2i users was not significantly associated with a change in risk (HR, 1.04; 95% CI, 0.44-2.44; p=0.936)., Conclusions: In this nationwide cohort study of individuals with type 2 diabetes, treatment with SGLT2i was associated with a lower risk of AF compared with treatment with DPP-4i., Competing Interests: The authors have no financial conflicts of interest., (Copyright © 2024. The Korean Society of Cardiology.)
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- 2024
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13. The Association of CHADS-P2A2RC Risk Score With Clinical Outcomes in Patients Taking P2Y12 Inhibitor Monotherapy After 3 Months of Dual Antiplatelet Therapy Following Percutaneous Coronary Intervention.
- Author
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Song PS, Seong SW, Kim JY, An SY, Kim MJ, Ahn KT, Jin SA, Jeong JO, Yang JH, Hahn JY, Gwon HC, Jang WJ, Yoon HJ, Bae JW, Choi WG, and Song YB
- Abstract
Background and Objectives: Concerns remain that early aspirin cessation may be associated with potential harm in subsets at high risk of ischemic events. This study aimed to assess the effects of P2Y12 inhibitor monotherapy after 3-month dual antiplatelet therapy (DAPT) vs. prolonged DAPT (12-month or longer) based on the ischemic risk stratification, the CHADS-P2A2RC, after percutaneous coronary intervention (PCI)., Methods: This was a sub-study of the SMART-CHOICE trial. The effect of the randomized antiplatelet strategies was assessed across 3 CHADS-P2A2RC risk score categories. The primary outcome was a major adverse cardiac and cerebral event (MACCE), a composite of all-cause death, myocardial infarction, or stroke., Results: Up to 3 years, the high CHADS-P2A2RC risk score group had the highest incidence of MACCE (105 [12.1%], adjusted hazard ratio [HR], 2.927; 95% confidence interval [CI], 1.358-6.309; p=0.006) followed by moderate-risk (40 [1.4%], adjusted HR, 1.786; 95% CI, 0.868-3.674; p=0.115) and low-risk (9 [0.5%], reference). In secondary analyses, P2Y12 inhibitor monotherapy reduced the Bleeding Academic Research Consortium (BARC) types 2, 3, or 5 bleeding without increasing the risk of MACCE as compared with prolonged DAPT across the 3 CHADS-P2A2RC risk strata without significant interaction term (interaction p for MACCE=0.705 and interaction p for BARC types 2, 3, or 5 bleeding=0.055)., Conclusions: The CHADS-P2A2RC risk score is valuable in discriminating high-ischemic-risk patients. Even in such patients with a high risk of ischemic events, P2Y12 inhibitor monotherapy was associated with a lower incidence of bleeding without increased risk of ischemic events compared with prolonged DAPT., Trial Registration: ClinicalTrials.gov Identifier: NCT02079194., Competing Interests: The authors have no financial conflicts of interest., (Copyright © 2024. The Korean Society of Cardiology.)
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- 2024
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14. Exploring the Therapeutic Effects of Atractylodes macrocephala Koidz against Human Gastric Cancer.
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Choi NR, Choi WG, Zhu A, Park J, Kim YT, Hong J, and Kim BJ
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- Humans, Animals, Mice, Reactive Oxygen Species, Caspases, Plant Extracts pharmacology, Stomach Neoplasms drug therapy, Atractylodes
- Abstract
Atractylodes macrocephala Koidz (AMK) is a traditional herbal medicine used for thousands of years in East Asia to improve a variety of illnesses and conditions, including cancers. This study explored the effect of AMK extract on apoptosis and tumor-grafted mice using AGS human gastric adenocarcinoma cells. We investigated the compounds, target genes, and associated diseases of AMK using the Traditional Chinese Medical Systems Pharmacy (TCMSP) database platform. Cell viability assay, cell cycle and mitochondrial depolarization analysis, caspase activity assay, reactive oxygen species (ROS) assay, and wound healing and spheroid formation assay were used to investigate the anti-cancer effects of AMK extract on AGS cells. Also, in vivo studies were conducted using subcutaneous xenografts. AMK extract reduced the viability of AGS cells and increased the sub-G1 cell fraction and the mitochondrial membrane potential. Also, AMK extract increased the production of ROS. AMK extract induced the increased caspase activities and modulated the mitogen-activated protein kinases (MAPK). In addition, AMK extract effectively inhibited AGS cell migration and led to a notable reduction in the growth of AGS spheroids. Moreover, AMK extract hindered the growth of AGS xenograft tumors in NSG mice. Our results suggest that AMK has anti-cancer effects by promoting cell cycle arrest and inhibiting the proliferation of AGS cancer cells and a xenograft model through apoptosis. This study could provide a novel approach to treat gastric cancer.
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- 2024
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15. A Rare Case of Primary Cutaneous Basaloid Squamous Cell Carcinoma of the Finger.
- Author
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Kim HS, Choi WG, Lee SK, Lee UH, and Kim MS
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- Humans, Fingers pathology, Upper Extremity pathology, Carcinoma, Squamous Cell pathology, Esophageal Neoplasms pathology
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- 2024
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16. Corrigendum: Association between exposure to tobacco information through mass media, smoking households and secondhand smoke exposure in adolescents: Survey data from South Korea.
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Du W, Chen G, Gu M, Deng H, and Choi WG
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[This corrects the article DOI: 10.18332/tid/175705.]., (© 2024 Du W. et al.)
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- 2024
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17. Changes in alcohol consumption habits and risk of atrial fibrillation: a nationwide population-based study.
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Lee JW, Roh SY, Yoon WS, Kim J, Jo E, Bae DH, Kim M, Lee JH, Kim SM, Choi WG, Bae JW, Hwang KK, Kim DW, Cho MC, Kim YS, Kim Y, You HS, Kang HT, and Lee DI
- Subjects
- Humans, Alcohol Drinking adverse effects, Alcohol Drinking epidemiology, Risk Factors, Habits, Atrial Fibrillation diagnosis, Atrial Fibrillation epidemiology, Atrial Fibrillation etiology, Heart Failure complications
- Abstract
Aims: Heavy alcohol consumption is an established risk factor for atrial fibrillation (AF). However, the association between habitual changes in heavy habitual drinkers and incident AF remains unclear. The aim of this study was to evaluate whether absolute abstinence or reduced drinking decreases incident AF in heavy habitual drinkers., Methods and Results: Atrial fibrillation-free participants with heavy alcohol consumption registered in the Korean National Health Insurance Service database between 2005 and 2008 were enrolled. Habitual changes in alcohol consumption between 2009 and 2012 were classified as sustained heavy drinking, reduced drinking, and absolute abstinence. The primary outcome measure was new-onset AF during the follow-up. To minimize the effect of confounding variables on outcome events, inverse probability of treatment weighting (IPTW) analysis was performed. Overall, 19 425 participants were evaluated. The absolute abstinence group showed a 63% lower incidence of AF (IPTW hazard ratio: 0.379, 95% confidence interval: 0.169-0.853) than did the sustained heavy drinking group. Subgroup analysis identified that abstinence significantly reduced incident AF in participants with normal body mass index and without hypertension, diabetes, dyslipidaemia, heart failure, stroke, chronic kidney disease, or coronary artery disease (all P-value <0.05). There was no statistical difference in incident AF in participants with reduced drinking compared with sustained heavy alcohol group., Conclusion: Absolute abstinence could reduce the incidence of AF in heavy alcohol drinkers. Comprehensive clinical measures and public health policies are warranted to motivate alcohol abstinence in heavy drinkers., Competing Interests: Conflict of interest: None declared., (© The Author(s) 2023. Published by Oxford University Press on behalf of the European Society of Cardiology.)
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- 2024
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18. The vacuolar Ca 2+ transporter CATION EXCHANGER 2 regulates cytosolic calcium homeostasis, hypoxic signaling, and response to flooding in Arabidopsis thaliana.
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Bakshi A, Choi WG, Kim SH, and Gilroy S
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- Antiporters genetics, Antiporters metabolism, Calcium metabolism, Calcium Signaling, Cations metabolism, Gene Expression Regulation, Plant, Homeostasis, Arabidopsis genetics, Arabidopsis metabolism, Arabidopsis Proteins genetics, Arabidopsis Proteins metabolism, Cation Transport Proteins metabolism
- Abstract
Flooding represents a major threat to global agricultural productivity and food security, but plants are capable of deploying a suite of adaptive responses that can lead to short- or longer-term survival to this stress. One cellular pathway thought to help coordinate these responses is via flooding-triggered Ca
2+ signaling. We have mined publicly available transcriptomic data from Arabidopsis subjected to flooding or low oxygen stress to identify rapidly upregulated, Ca2+ -related transcripts. We then focused on transporters likely to modulate Ca2+ signals. Candidates emerging from this analysis included AUTOINHIBITED Ca2+ ATPASE 1 and CATION EXCHANGER 2. We therefore assayed mutants in these genes for flooding sensitivity at levels from growth to patterns of gene expression and the kinetics of flooding-related Ca2+ changes. Knockout mutants in CAX2 especially showed enhanced survival to soil waterlogging coupled with suppressed induction of many marker genes for hypoxic response and constitutive activation of others. CAX2 mutants also generated larger and more sustained Ca2+ signals in response to both flooding and hypoxic challenges. CAX2 is a Ca2+ transporter located on the tonoplast, and so these results are consistent with an important role for vacuolar Ca2+ transport in the signaling systems that trigger flooding response., (© 2023 The Authors. New Phytologist © 2023 New Phytologist Foundation.)- Published
- 2023
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19. Efficacy and safety of cilostazol-based triple antiplatelet therapy compared with clopidogrel-based dual antiplatelet therapy in patients with acute ST-elevation myocardial infarction undergoing percutaneous coronary intervention: A multicenter, randomized, open-label, phase 4 trial.
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Park S, Rha SW, Choi BG, Kim W, Choi WG, Lee SJ, Lee JB, Park JY, Park SM, Jeong MH, Kim YH, Her AY, Kim MW, Chen KY, Kim BK, Shin ES, Seo JB, Ahn J, Choi SY, Byun JK, Cha JA, Hyun SJ, Choi CU, and Park CG
- Abstract
Background: Previous studies reported that compared to conventional dual antiplatelet therapy (DAT; aspirin + clopidogrel), triple antiplatelet therapy (TAT), involving the addition of cilostazol to DAT, had better clinical outcomes in patients with ST-elevation myocardial infarction (STEMI). However, the optimal duration of TAT is yet to be determined., Methods: In total, 985 patients with STEMI who underwent primary percutaneous coronary intervention (PCI) with drug-eluting stents (DESs) were prospectively enrolled in 15 PCI centers in South Korea and China. We randomly assigned patients into 3 groups: DAT (aspirin and clopidogrel for 12 months), TAT 1M (aspirin, clopidogrel, and cilostazol for 1 month), and TAT 6M (aspirin, clopidogrel, and cilostazol for 6 months). The primary endpoint was 1-year major adverse cardiovascular events (MACEs), defined as a composite of all-cause death, recurrent myocardial infarction, stroke, or repeat revascularization., Results: The primary endpoint did not differ among the 3 groups (8.8% in DAT, 11.0% in TAT 1M, and 11.6% in TAT 6M; hazard ratio for TAT 1M vs DAT, 1.302; 95% confidence interval [CI], 0.792-2.141; P = .297; hazard ratio for TAT 6M vs DAT, 1.358; 95% CI, 0.829-2.225; P = .225). With respect to in-hospital outcomes, more bleeding events occurred in the TAT group than in the DAT group (1.3% vs 4.7% vs 2.6%, P = .029), with no significant differences in major bleeding events. Additionally, the TAT group had a higher incidence of headaches (0% vs 1.6% vs 2.6%, P = .020)., Conclusions: The addition of cilostazol to DAT did not reduce the incidence of 1-year MACEs compared with DAT alone. Instead, it may be associated with an increased risk of drug intolerance and side effects, including in-hospital bleeding and headaches., (Copyright © 2023 Elsevier Inc. All rights reserved.)
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- 2023
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20. Effect of delayed hospitalization on patients with non-ST-segment elevation myocardial infarction and complex lesions undergoing successful new-generation drug-eluting stents implantation.
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Kim YH, Her AY, Rha SW, Choi CU, Choi BG, Kim JB, Park S, Kang DO, Park JY, Choi WG, Park SH, and Jeong MH
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- Humans, Embryo Implantation, Hospitalization, Patients, Drug-Eluting Stents, Non-ST Elevated Myocardial Infarction surgery, ST Elevation Myocardial Infarction
- Abstract
In the absence of available data, we evaluated the effects of delayed hospitalization (symptom-to-door time [SDT] ≥ 24 h) on major clinical outcomes after new-generation drug-eluting stent implantation in patients with non-ST-segment elevation myocardial infarction (NSTEMI) and complex lesions. In total, 4373 patients with NSTEMI were divided into complex (n = 2106) and non-complex (n = 2267) groups. The primary outcome was the 3-year rate of major adverse cardiac events (MACE), defined as all-cause death, recurrent MI, and any repeat revascularization. Secondary outcomes included the individual MACE components. In the complex group, all-cause death (adjusted hazard ratio [aHR], 1.752; p = 0.004) and cardiac death (aHR, 1.966; p = 0.010) rates were significantly higher for patients with SDT ≥ 24 h than for those with SDT < 24 h. In the non-complex group, all patients showed similar clinical outcomes. Patients with SDT < 24 h (aHR, 1.323; p = 0.031) and those with SDT ≥ 24 h (aHR, 1.606; p = 0.027) showed significantly higher rates of any repeat revascularization and all-cause death, respectively, in the complex group than in the non-complex group. Thus, in the complex group, delayed hospitalization was associated with higher 3-year mortalities., (© 2023. Springer Nature Limited.)
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- 2023
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21. Influence of early dose reduction of ticagrelor on clinical outcomes following percutaneous coronary intervention for complex lesions.
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Lee Y, Shin JH, Seo SM, Choi IJ, Lee JY, Lee JW, Park MW, Kang TS, Choi WG, Jeon KH, Lim HS, Joo HJ, Rhee SJ, Seo JB, Park MS, Park SH, and Lim YH
- Subjects
- Humans, Ticagrelor, Cohort Studies, Drug Tapering, Platelet Aggregation Inhibitors adverse effects, Prospective Studies, Percutaneous Coronary Intervention adverse effects
- Abstract
Ticagrelor-based dual antiplatelet therapy (DAPT) provides potent antiplatelet inhibition but may increase the bleeding risk in Asian populations. We investigated the influence of early ticagrelor dose reduction (120 mg) on clinical outcomes in Korean patients undergoing percutaneous coronary intervention (PCI). A multicenter prospective clinical cohort study was conducted with patients who received standard-dose ticagrelor-based DAPT (180 mg) after PCI for complex lesions. Major adverse cardiovascular event (MACE: a composite of cardiovascular death, myocardial infarction, stroke, and repeat revascularization), bleeding, and net adverse clinical events (NACE: a composite of MACE and bleeding) were assessed. Among the 772 patients on standard-dose ticagrelor-based DAPT, 115 (14.8%) switched to low-dose ticagrelor-based DAPT (120 mg) within 6 months. Common reasons for the regimen changes were switching as planned (38.8%), dyspnea (25.5%), and bleeding (23.6%). A multivariable Cox proportional hazard model (CPH) showed that the risks of MACE, bleeding, and NACE were not different between the low-dose and standard-dose groups throughout the entire follow-up period and the period beyond 6 months post-PCI. Time-varying multivariable CPH models of the ticagrelor dose reduction yielded similar results. A reduction of the ticagrelor dose within 6 months after PCI is feasible and safe even in patients with complex lesions harboring a high ischemic event risk., (© 2023. Springer Nature Limited.)
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- 2023
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22. Moderate-Intensity Statin With Ezetimibe Combination Therapy vs High-Intensity Statin Monotherapy in Patients at Very High Risk of Atherosclerotic Cardiovascular Disease: A Post Hoc Analysis From the RACING Randomized Clinical Trial.
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Lee SJ, Cha JJ, Choi WG, Lee WS, Jeong JO, Choi S, Cho YH, Park W, Yoon CH, Lee YJ, Hong SJ, Ahn CM, Kim BK, Ko YG, Choi D, Hong MK, Jang Y, Hong SJ, and Kim JS
- Subjects
- United States, Humans, Male, Middle Aged, Ezetimibe therapeutic use, Rosuvastatin Calcium therapeutic use, Cholesterol, LDL, Hydroxymethylglutaryl-CoA Reductase Inhibitors, Anticholesteremic Agents therapeutic use, Cardiovascular Diseases epidemiology, Cardiovascular Diseases prevention & control, Cardiovascular Diseases chemically induced, Atherosclerosis drug therapy, Atherosclerosis chemically induced
- Abstract
Importance: High-intensity statin is strongly recommended in patients at very high risk (VHR) of atherosclerotic cardiovascular disease (ASCVD). However, concerns about statin-associated adverse effects result in underuse of this strategy in practice., Objective: To evaluate the outcomes of a moderate-intensity statin with ezetimibe combination in VHR and non-VHR patients with ASCVD., Design, Setting, and Participants: This was a post hoc analysis of the Randomized Comparison of Efficacy and Safety of Lipid Lowering With Statin Monotherapy vs Statin/Ezetimibe Combination for High-Risk Cardiovascular Disease (RACING) open-label, multicenter, randomized clinical trial. The study was conducted from February 2017 to December 2018 at 26 centers in Korea. Study participants included patients with documented ASCVD. Data were analyzed from April to June 2022., Interventions: Patients were randomly assigned to moderate-intensity statin with ezetimibe (rosuvastatin, 10 mg, with ezetimibe, 10 mg) or high-intensity statin monotherapy (rosuvastatin, 20 mg). Patients at VHR for ASCVD were defined according to the 2018 American Heart Association/American College of Cardiology guidelines., Main Outcomes and Measures: The primary end point was the 3-year outcome of cardiovascular death, coronary or peripheral revascularization, hospitalization of cardiovascular events, or nonfatal stroke., Results: A total of 3780 patients (mean [SD] age, 64 [10] years; 2826 male [75%]) in the RACING trial, 1511 (40.0%) were categorized as VHR, which was associated with a greater occurrence of the primary end point (hazard ratio [HR], 1.42; 95% CI, 1.15-1.75). There was no significant difference in the primary end point between those who received combination therapy and high-intensity statin monotherapy among patients with VHR disease (11.2% vs 11.7%; HR, 0.96; 95% CI, 0.71-1.30) and non-VHR disease (7.7% vs 8.7%; HR, 0.88; 95% CI, 0.66-1.18). The median low-density lipoprotein cholesterol (LDL-C) level was significantly lower in the combination therapy group than in the high-intensity statin group (VHR, 1 year: 57 [47-71] mg/dL vs 65 [53-78] mg/dL; non-VHR, 1 year: 58 mg/dL vs 68 mg/dL; P < .001). Furthermore, in both the VHR and non-VHR groups, combination therapy was associated with a significantly greater mean change in LDL-C level (VHR, 1 year: -19.1 mg/dL vs -10.1 mg/dL; 2 years: -22.3 mg/dL vs -13.0 mg/dL; 3 years: -18.8 mg/dL vs -9.7 mg/dL; non-VHR, 1 year: -23.7 mg/dL vs -12.5 mg/dL; 2 years: -25.2 mg/dL vs -15.1 mg/dL; 3 years: -23.5 mg/dL vs -12.6 mg/dL; all P < .001) and proportion of patients with LDL-C level less than 70 mg/dL (VHR, 1 year: 73% vs 58%; non-VHR, 1 year: 72% vs 53%; P < .001). Discontinuation or dose reduction of the lipid-lowering drug due to intolerance occurred less frequently in the combination therapy group (VHR, 4.6% vs 7.7%; P = .02; non-VHR, 5.0% vs 8.7%; P = .001)., Conclusions and Relevance: Results suggest that the outcomes of ezetimibe combination observed in the RACING trial were consistent among patients at VHR of ASCVD., Trial Registration: ClinicalTrials.gov Identifier: NCT03044665.
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- 2023
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23. Clinical safety and effectiveness of the Genoss drug-eluting stent in real-world clinical practice.
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Youn YJ, Lee JW, Ahn SG, Lee SH, Yoon J, Park JH, Yoo SY, Kang WC, Lee NH, Kwon KH, Doh JH, Lim SW, Jang YS, Jeon DW, Heo JH, Choi WG, Cho S, Lee BK, Jeong H, Hong BK, and Choi HH
- Subjects
- Humans, Male, Female, Prospective Studies, Treatment Outcome, Sirolimus adverse effects, Death, Prosthesis Design, Drug-Eluting Stents, Coronary Artery Disease diagnostic imaging, Coronary Artery Disease therapy, Myocardial Infarction etiology, Percutaneous Coronary Intervention adverse effects
- Abstract
Background/aims: The Genoss DES™ is a novel, biodegradable, polymer-coated, sirolimus-eluting stent with a cobalt- chromium stent platform and thin strut. Although the safety and effectiveness of this stent have been previously investigated, real-world clinical outcomes data are lacking. Therefore, the aim of this prospective, multicenter trial was to evaluate the clinical safety and effectiveness of the Genoss DES™ in all-comer patients undergoing percutaneous coronary intervention., Methods: The Genoss DES registry is a prospective, single-arm, observational trial for evaluation of clinical outcomes after Genoss DES™ implantation in all-comer patients undergoing percutaneous coronary intervention from 17 sites in South Korea. The primary endpoint was a device-oriented composite outcome of cardiac death, target vessel-related myocardial infarction (MI), and clinically driven target lesion revascularization (TLR) at 12 months., Results: A total of 1,999 patients (66.4 ± 11.1 years of age; 72.8% male) were analyzed. At baseline, 62.8% and 36.7% of patients had hypertension and diabetes, respectively. The implanted stent number, diameter, and length per patient were 1.5 ± 0.8, 3.1 ± 0.5 mm, and 37.0 ± 25.0 mm, respectively. The primary endpoint occurred in 1.8% patients, with a cardiac death rate of 1.1%, target vessel-related MI rate of 0.2%, and clinically driven TLR rate of 0.8%., Conclusion: In this real-world registry, the Genoss DES™ demonstrated excellent safety and effectiveness at 12 months among all-comer patients undergoing percutaneous coronary intervention. These findings suggest that the Genoss DES™ may be a viable treatment option for patients with coronary artery disease.
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- 2023
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24. Alteration of replication protein A binding mode on single-stranded DNA by NSMF potentiates RPA phosphorylation by ATR kinase.
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Kang Y, Han YG, Khim KW, Choi WG, Ju MK, Park K, Shin KJ, Chae YC, Choi JH, Kim H, and Lee JY
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- Ataxia Telangiectasia Mutated Proteins metabolism, Checkpoint Kinase 1 metabolism, DNA Damage, DNA Replication, DNA, Single-Stranded, DNA-Binding Proteins genetics, Phosphorylation, Protein Binding, Protein Kinases genetics, Humans, Protein Serine-Threonine Kinases metabolism, Replication Protein A metabolism
- Abstract
Replication protein A (RPA), a eukaryotic single-stranded DNA (ssDNA) binding protein, dynamically interacts with ssDNA in different binding modes and plays essential roles in DNA metabolism such as replication, repair, and recombination. RPA accumulation on ssDNA due to replication stress triggers the DNA damage response (DDR) by activating the ataxia telangiectasia and RAD3-related (ATR) kinase, which phosphorylates itself and downstream DDR factors, including RPA. We recently reported that the N-methyl-D-aspartate receptor synaptonuclear signaling and neuronal migration factor (NSMF), a neuronal protein associated with Kallmann syndrome, promotes RPA32 phosphorylation via ATR upon replication stress. However, how NSMF enhances ATR-mediated RPA32 phosphorylation remains elusive. Here, we demonstrate that NSMF colocalizes and physically interacts with RPA at DNA damage sites in vivo and in vitro. Using purified RPA and NSMF in biochemical and single-molecule assays, we find that NSMF selectively displaces RPA in the more weakly bound 8- and 20-nucleotide binding modes from ssDNA, allowing the retention of more stable RPA molecules in the 30-nt binding mode. The 30-nt binding mode of RPA enhances RPA32 phosphorylation by ATR, and phosphorylated RPA becomes stabilized on ssDNA. Our findings provide new mechanistic insight into how NSMF facilitates the role of RPA in the ATR pathway., (© The Author(s) 2023. Published by Oxford University Press on behalf of Nucleic Acids Research.)
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- 2023
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25. The traditional herbal medicines mixture, Banhasasim-tang, relieves the symptoms of irritable bowel syndrome via modulation of TRPA1, NaV1.5 and NaV1.7 channels.
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Choi NR, Kwon MJ, Choi WG, Kim SC, Park JW, Nam JH, and Kim BJ
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- Mice, Animals, Quality of Life, Diarrhea chemically induced, Diarrhea drug therapy, Plant Extracts pharmacology, Plant Extracts therapeutic use, TRPA1 Cation Channel, Irritable Bowel Syndrome drug therapy, Irritable Bowel Syndrome chemically induced, Plants, Medicinal
- Abstract
Ethnopharmacological Relevance: The cause of irritable bowel syndrome (IBS), a functional gastrointestinal (GI) disorder, remains unclear. Banhasasim-tang (BHSST), a traditional herbal medicines mixture, mainly used to treat GI-related diseases, may have a potential in IBS treatment. IBS is characterized by abdominal pain as the main clinical symptom, which seriously affects the quality of life., Aim of the Study: We conducted a study to evaluate the effectiveness of BHSST and its mechanisms of action in treating IBS., Materials and Methods: We evaluated the efficacy of BHSST in a zymosan-induced diarrhea-predominant animal model of IBS. Electrophysiological methods were used to confirm modulation of transient receptor potential (TRP) and voltage-gated Na
+ (NaV) ion channels, which are associated mechanisms of action., Results: Oral administration of BHSST decreased colon length, increased stool scores, and increased colon weight. Weight loss was also minimized without affecting food intake. In mice administered with BHSST, the mucosal thickness was suppressed, making it similar to that of normal mice, and the degree of tumor necrosis factor-α was severely reduced. These effects were similar to those of the anti-inflammatory drug-sulfasalazine-and antidepressant-amitriptyline. Moreover, pain-related behaviors were substantially reduced. Additionally, BHSST inhibited TRPA1, NaV1.5, and NaV1.7 ion channels associated with IBS-mediated visceral hypersensitivity., Conclusions: In summary, the findings suggest that BHSST has potential beneficial effects on IBS and diarrhea through the modulation of ion channels., Competing Interests: Declaration of competing interest No potential conflict of interest was reported by the authors., (Copyright © 2023 Elsevier B.V. All rights reserved.)- Published
- 2023
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26. Cardiac osteosarcoma: a case report and literature review.
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Bae DH, Park S, Kim M, Kim S, Choi WG, Bae JW, Hwang KK, Kim DW, Cho MC, and Lee JH
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Background: Primary cardiac tumors are rare, and malignant primary cardiac tumors are even rarer. Cardiac osteosarcoma is a very rare type of malignant primary cardiac tumor with limited reported cases. We present a case report of cardiac osteosarcoma and review its characteristics and the related literature., Case Summary: A 44-year-old female patient without a specific medical history presented with intermittent dyspnea that started 1 month prior to presentation. A heterogeneous mass was observed in the left atrium on echocardiography and a large mass was observed in the left atrium on computed tomography. Surgery was performed under the suspicion of atypical cardiac myxoma, and the tumor was successfully removed. However, postoperative histopathological examination revealed cardiac osteosarcoma. The patient underwent chemotherapy and has been well maintained without recurrence for 10 years., Conclusion: We present a case report of the echocardiographic features and treatment strategies for cardiac osteosarcoma, an extremely rare cardiac tumor. Multimodal imaging can be helpful; however, a histological diagnosis through surgical resection is essential. Appropriate treatment and follow-up based on histological findings are necessary., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (© 2023 Bae, Park, Kim, Kim, Choi, Bae, Hwang, Kim, Cho and Lee.)
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- 2023
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27. Analysis of Network Pharmacological Efficacy and Therapeutic Effectiveness in Animal Models for Functional Dyspepsia of Foeniculi fructus .
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Choi NR, Jung D, Kim SC, Park JW, Choi WG, and Kim BJ
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- Animals, Mice, Network Pharmacology, Medicine, Chinese Traditional, Disease Models, Animal, Molecular Docking Simulation, Dyspepsia drug therapy, Drugs, Chinese Herbal pharmacology, Drugs, Chinese Herbal therapeutic use
- Abstract
For centuries, Foeniculi fructus ( F. fructus ) has been used as a traditional herbal medicine in China and Europe and is widely used as a natural therapy for digestive disorders, including indigestion, flatulence, and bloating. The mechanism of F. fructus that alleviates functional dyspepsia was analyzed through network pharmacology, and its therapeutic effect on an animal model of functional dyspepsia were investigated. The traditional Chinese medicine systems pharmacology (TCMSP) database was used to investigate the compounds, targets, and associated diseases of F. fructus . Information on the target genes was classified using the UniProtdatabase. Using the Cytoscape 3.9.1 software, a network was constructed, and the Cytoscape string application was employed to examine genes associated with functional dyspepsia. The efficacy of F. fructus on functional dyspepsia was confirmed by treatment with its extract in a mouse model of loperamide-induced functional dyspepsia. Seven compounds targeted twelve functional dyspepsia-associated genes. When compared to the control group, F. fructus exhibited significant suppression of symptoms in a mouse model of functional dyspepsia. The results of our animal studies indicated a close association between the mechanism of action of F. fructus and gastrointestinal motility. Based on animal experimental results, the results showed that F. fructus provided a potential means to treat functional dyspepsia, suggesting that its medical mechanism for functional dyspepsia could be described by the relationship between seven key compounds of F. fructus , including oleic acid, β-sitosterol, and 12 functional dyspepsia-related genes.
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- 2023
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28. A Study on the Effects of Muscarinic and Serotonergic Regulation by Bojanggunbi-tang on the Pacemaker Potential of the Interstitial Cells of Cajal in the Murine Small Intestine.
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Choi NR, Jeong H, Choi WG, Park JW, Ko SJ, and Kim BJ
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- Animals, Mice, Membrane Potentials, Signal Transduction, Intestine, Small metabolism, Protein Kinase Inhibitors pharmacology, Cholinergic Agents metabolism, Cholinergic Agents pharmacology, Mice, Inbred BALB C, Cells, Cultured, Interstitial Cells of Cajal metabolism
- Abstract
In traditional Korean medicine, the 16-herb concoction Bojanggunbi-tang (BGT) is used to treat various gastrointestinal (GI) diseases. In this study, we investigated the regulatory mechanism underlying the influence of BGT on the interstitial cells of Cajal (ICCs), pacemaker cells in the GI tract. Within 12 h of culturing ICCs in the small intestines of mice, the pacemaker potential of ICCs was recorded through an electrophysiological method. An increase in the BGT concentration induced depolarization and decreased firing frequency. This reaction was suppressed by cholinergic receptor muscarinic 3 (CHRM3) antagonists, as well as 5-hydroxytryptamine receptor (5HTR) 3 and 4 antagonists. Nonselective cation channel inhibitors, such as thapsigargin and flufenamic acid, along with protein kinase C (PKC) and mitogen-activated protein kinase (MAPK) inhibitors, also suppressed the BGT reaction. Guanylate cyclase and protein kinase G (PKG) antagonists inhibited BGT, but adenylate cyclase and protein kinase A antagonists had no effect. In conclusion, we demonstrated that BGT acts through CHRM3, 5HTR3, and 5HTR4 to regulate intracellular Ca
2+ concentrations and the PKC, MAPK, guanylate cycle, and PKG signaling pathways., Competing Interests: Competing Interests: The authors have declared that no competing interest exists., (© The author(s).)- Published
- 2023
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29. Immediate versus staged complete revascularization in patients with ST-segment elevation myocardial infarction and multivessel coronary artery disease: results from a prematurely discontinued randomized multicenter trial.
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Park S, Rha SW, Choi BG, Cho JH, Park SH, Lee JB, Kim YH, Park SM, Choi JW, Park JY, Shin ES, Lee JB, Suh J, Chae JK, Choi YJ, Jeong MH, Cha KS, Lee SW, Kim U, Kim GC, Choi WG, Cho YH, Cho DK, Ahn J, Suh SY, Choi SY, Byun JK, Cha JA, Hyun SJ, Kim JB, Choi CU, and Park CG
- Subjects
- Humans, Prospective Studies, Risk Factors, Treatment Outcome, Death, Myocardial Revascularization, Coronary Artery Disease complications, Coronary Artery Disease surgery, ST Elevation Myocardial Infarction therapy, Percutaneous Coronary Intervention methods, Stroke etiology
- Abstract
Background: We aimed to compare clinical outcomes between immediate and staged complete revascularization in primary percutaneous coronary intervention (PCI) for treating ST-segment elevation myocardial infarction (STEMI) and multivessel disease (MVD)., Methods: A total of 248 patients were enrolled in a prospective, randomized, and multicenter registry. Immediate revascularization was defined as one-time PCI of culprit and non-culprit lesions at the initial procedure. Staged revascularization was defined as PCI of non-culprit lesions at a later date (mean, 4.4 days; interquartile range, 1-11.4), following initial culprit revascularization. The end points were major adverse cardiovascular events (MACE; composite of total death, recurrent myocardial infarction, and revascularization), any individual components of MACE, cardiac death, stent thrombosis, and stroke at 12 months., Results: During a follow-up of 1 year, MACE occurred in 12 patients (11.6%) in the immediate revascularization group and in 8 patients (7.5%) in staged revascularization group (hazard ratio [HR] 1.60, 95% confidence interval [CI] 0.65-3.91). The incidence of total death was numerically higher in the immediate group than in the staged group (9.7% vs 2.8%, HR 3.53, 95% CI 0.97-12.84); There were no significant differences between the 2 groups in risks of any individual component of MACE, cardiac death, stroke, and in-hospital complications, such as need for transfusion, bleeding, acute renal failure, and acute heart failure. This study was prematurely terminated due to halt of production of everolimus-eluting stents (manufactured as PROMUS Element by Boston Scientific, Natick, Massachusetts)., Conclusions: Due to its limited power, no definite conclusion can be drawn regarding complete revascularization strategy from the present study. Further large randomized clinical trials would be warranted to confirm optimal timing of complete revascularization for patients with STEMI and MVD., (Copyright © 2023 Elsevier Inc. All rights reserved.)
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- 2023
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30. Overexpressing Vitamin C Defective 2 reduces fertility and alters Ca2+ signals in Arabidopsis pollen.
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Weigand C, Brady D, Davis JA, Speicher T, Bacalso J, Jones D, Miller G, Choi WG, and Harper JF
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- Fertility genetics, Gene Expression, Pollen Tube enzymology, Pollen Tube genetics, Promoter Regions, Genetic genetics, Arabidopsis enzymology, Arabidopsis genetics, Arabidopsis Proteins genetics, Arabidopsis Proteins metabolism, Calcium Signaling genetics, Pollen enzymology, Pollen genetics
- Abstract
A potential strategy to mitigate oxidative damage in plants is to increase the abundance of antioxidants, such as ascorbate (i.e. vitamin C). In Arabidopsis (A. thaliana), a rate-limiting step in ascorbate biosynthesis is a phosphorylase encoded by Vitamin C Defective 2 (VTC2). To specifically overexpress VTC2 (VTC2 OE) in pollen, the coding region was expressed using a promoter from a gene with ∼150-fold higher expression in pollen, leading to pollen grains with an eight-fold increased VTC2 mRNA. VTC2 OE resulted in a near-sterile phenotype with a 50-fold decrease in pollen transmission efficiency and a five-fold reduction in the number of seeds per silique. In vitro assays revealed pollen grains were more prone to bursting (greater than two-fold) or produced shorter, morphologically abnormal pollen tubes. The inclusion of a genetically encoded Ca2+ reporter, mCherry-GCaMP6fast (CGf), revealed pollen tubes with altered tip-focused Ca2+ dynamics and increased bursting frequency during periods of oscillatory and arrested growth. Despite these phenotypes, VTC2 OE pollen failed to show expected increases in ascorbate or reductions in reactive oxygen species, as measured using a redox-sensitive dye or a roGFP2. However, mRNA expression analyses revealed greater than two-fold reductions in mRNA encoding two enzymes critical to biosynthetic pathways related to cell walls or glyco-modifications of lipids and proteins: GDP-d-mannose pyrophosphorylase (GMP) and GDP-d-mannose 3',5' epimerase (GME). These results support a model in which the near-sterile defects resulting from VTC2 OE in pollen are associated with feedback mechanisms that can alter one or more signaling or metabolic pathways critical to pollen tube growth and fertility., Competing Interests: Conflict of interest statement. None declared., (© American Society of Plant Biologists 2023. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)
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- 2023
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31. Network Pharmacological Analysis and Experimental Validation of the Effect of Smilacis Glabrae Rhixoma on Gastrointestinal Motility Disorder.
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Choi NR, Lee K, Seo M, Ko SJ, Choi WG, Kim SC, Kim J, Park JW, and Kim BJ
- Abstract
Gastrointestinal motility disorder (GMD) is a disease that causes digestive problems due to inhibition of the movement of the gastrointestinal tract and is one of the diseases that reduce the quality of life of modern people. Smilacis Glabrae Rhixoma (SGR) is a traditional herbal medicine for many diseases and is sometimes prescribed to improve digestion. As a network pharmacological approach, we searched the TCMSP database for SGR, reviewed its constituents and target genes, and analyzed its relevance to gastrointestinal motility disorder. The effects of the SGR extract on the pacemaker activity in interstitial cells of Cajal (ICC) and gastric emptying were investigated. In addition, using the GMD mouse model through acetic acid (AA), we investigated the locomotor effect of SGR on the intestinal transit rate (ITR). As a result of network pharmacology analysis, 56 compounds out of 74 candidate compounds of SGR have targets, the number of targets is 390 targets, and there are 904 combinations. Seventeen compounds of SGR were related to GMD, and as a result of comparing the related genes with the GMD-related genes, 17 genes (active only) corresponded to both. When looking at the relationship network between GMD and SGR, it was confirmed that quercetin, resveratrol, SCN5A, TNF, and FOS were most closely related to GMD. In addition, the SGR extract regulated the pacemaker activity in ICC and recovered the delayed gastric emptying. As a result of feeding the SGR extract to AA-induced GMD mice, it was confirmed that the ITR decreased by AA was restored by the SGR extract. Through network pharmacology, it was confirmed that quercetin, resveratrol, SCN5A, TNF, and FOS were related to GMD in SGR, and these were closely related to intestinal motility. Based on these results, it is suggested that SGR in GMD restores digestion through the recovery of intestinal motility.
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- 2023
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32. Sex Differences in Delayed Hospitalization in Patients with Non-ST-Segment Elevation Myocardial Infarction Undergoing New-Generation Drug-Eluting Stent Implantation.
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Kim YH, Her AY, Rha SW, Choi CU, Choi BG, Kim JB, Park S, Kang DO, Park JY, Choi WG, Park SH, and Jeong MH
- Abstract
We compared the effects of sex differences in delayed hospitalization (symptom-to-door time [SDT], ≥24 h) on major clinical outcomes in patients with non-ST-segment elevation myocardial infarction after new-generation drug-eluting stent implantation. A total of 4593 patients were classified into groups with ( n = 1276) and without delayed hospitalization (SDT < 24 h, n = 3317). Thereafter, these two groups were subdivided into male and female groups. The primary clinical outcomes were major adverse cardiac and cerebrovascular events (MACCE), defined as all-cause death, recurrent myocardial infarction, repeat coronary revascularization, and stroke. The secondary clinical outcome was stent thrombosis. After multivariable- and propensity score-adjusted analyses, in-hospital mortalities were similar between the male and female groups in both the SDT < 24 h and SDT ≥ 24 h groups. However, during a 3-year follow-up period, in the SDT < 24 h group, all-cause death ( p = 0.013 and p = 0.005, respectively) and cardiac death (CD, p = 0.015 and p = 0.008, respectively) rates were significantly higher in the female group than those in the male group. This may be related to the lower all-cause death and CD rates ( p = 0.022 and p = 0.012, respectively) in the SDT < 24 h group than in the SDT ≥ 24 h group among male patients. Other outcomes were similar between the male and female groups and between the SDT < 24 h and SDT ≥ 24 h groups. In this prospective cohort study, female patients showed higher 3-year mortality, especially in the SDT < 24 h, compared to male patients.
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- 2023
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33. SH003 Causes ER Stress-mediated Apoptosis of Breast Cancer Cells via Intracellular ROS Production.
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Lee SY, Kim TH, Choi WG, Chung YH, Ko SG, Cheon C, and Cho SG
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- Female, Humans, Reactive Oxygen Species metabolism, Cell Line, Tumor, Apoptosis, Angiogenesis Inhibitors pharmacology, Breast Neoplasms drug therapy, Breast Neoplasms genetics, Antineoplastic Agents pharmacology
- Abstract
Background/aim: Breast cancer is one of the most common cancers in women all over the world and new treatment options are urgent. ER stress in cancer cells results in apoptotic cell death, and it is being proposed as a new therapeutic target. SH003, a newly developed herbal medicine, has been reported to have anti-cancer effects. However, its molecular mechanism is not yet clearly defined., Materials and Methods: Microarray was performed to check the differential gene expression patterns in various breast cancer cell lines. Cell viability was measured by MTT assays to detect cytotoxic effects. Annexin V-FITC and 7AAD staining, TUNEL assay and DCF-DA staining were analyzed by flow cytometry to evaluate apoptosis and ROS levels, respectively. Protein expression was examined in SH003-breast cancer cells using immunoblotting assays. The expression of C/EBP Homologous Protein (CHOP) mRNA was measured by real-time PCR. The effects of CHOP by SH003 treatment were investigated using transfection method., Results: Herein, we investigated the molecular mechanisms through which SH003 causes apoptosis of human breast cancer cells. Both cell viability and apoptosis assays confirmed the SH003-induced apoptosis of breast cancer cells. Meanwhile, SH003 altered the expression patterns of several genes in a variety of breast cancer cell lines. More specifically, it upregulated gene sets including the response to unfolded proteins, independently of the breast cancer cell subtype. In addition, SH003-induced apoptosis was due to an increase in ROS production and an activation of the ER stress-signaling pathway. Moreover, CHOP gene silencing blocked SH003-induced apoptosis., Conclusion: SH003 causes apoptosis of breast cancer cells by upregulating ROS production and activating the ER stress-mediated pathway. Thus, our findings suggest that SH003 can be a potential therapeutic agent for breast cancer., (Copyright © 2023, International Institute of Anticancer Research (Dr. George J. Delinasios), All rights reserved.)
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- 2023
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34. Investigation of the biochemical controls on mercury uptake and mobility in trees.
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Gustin MS, Dunham-Cheatham SM, Harper JF, Choi WG, Blum JD, and Johnson MW
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- Environmental Monitoring, Hydrogen Peroxide, Isotopes, Mercury Isotopes, Mercury analysis, Methylmercury Compounds, Pinus
- Abstract
Atmospheric elemental mercury (Hg(0)) enters plant stomata, becomes oxidized, and is then transferred to annual growth rings providing an archive of air Hg(0) concentrations. To better understand the processes of Hg accumulation and translocation, the foliage of quaking aspen and Austrian pine were exposed to Hg(0), and methylmercury (MeHg) or Me
198 Hg via roots, in controlled exposures during the summer. Isotopic measurements demonstrated, in a laboratory setting, that the natural mass-dependent fractionation observed was the same as that measured in field studies, with the lighter isotopes being preferentially taken up by the leaves. Hg was measured in plant tissues across seasons. Aspen trees moved Hg into new growth immediately after exposure, resorbed Hg in the fall, and then distributed Hg to new growth tissues in the spring. Austrian pine did not reallocate Hg. Mercury measured in aspen leaf fractions of trees exposed to Hg(0) demonstrated that 85 % of Hg was in the cell wall. It was also found that redox-active molecules, such as H2 O2 , could potentiate the release of cell wall-bound Hg from aspen leaves, providing a potential mechanism for remobilization. Regardless of the mechanism, the ability of aspen to reallocate Hg to new tissues indicates that Hg distribution in tree rings from aspen do not provide a reliable record of yearly changes in atmospheric Hg(0)., Competing Interests: Declaration of competing interest The authors declare no conflict of interest., (Copyright © 2022 Elsevier B.V. All rights reserved.)- Published
- 2022
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35. Long-term Effects of P2Y12 Inhibitor Monotherapy After Percutaneous Coronary Intervention: 3-Year Follow-up of the SMART-CHOICE Randomized Clinical Trial.
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Choi KH, Park YH, Song YB, Park TK, Lee JM, Yang JH, Choi JH, Choi SH, Oh JH, Chun WJ, Jang WJ, Im ES, Jeong JO, Cho BR, Oh SK, Yun KH, Cho DK, Lee JY, Koh YY, Bae JW, Choi JW, Lee WS, Yoon HJ, Lee SU, Cho JH, Choi WG, Rha SW, Gwon HC, and Hahn JY
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- Humans, Male, Middle Aged, Female, Platelet Aggregation Inhibitors therapeutic use, Aspirin therapeutic use, Follow-Up Studies, Hemorrhage chemically induced, Hemorrhage epidemiology, Percutaneous Coronary Intervention methods, Drug-Eluting Stents
- Abstract
Importance: Although P2Y12 inhibitor monotherapy after a minimum period of dual antiplatelet therapy (DAPT) is a well-known way to reduce the risk of bleeding after percutaneous coronary intervention (PCI), data comparing long-term clinical outcomes between P2Y12 inhibitor monotherapy and extended DAPT in patients undergoing PCI have been unavailable., Objective: To identify the long-term safety and efficacy of P2Y12 inhibitor monotherapy following 3 months of DAPT after PCI., Design, Setting, and Participants: The Smart Angioplasty Research Team: Comparison Between P2Y12 Antagonist Monotherapy and Dual Antiplatelet Therapy in Patients Undergoing Implantation of Coronary Drug-Eluting Stents (SMART-CHOICE) trial was an open-label, noninferiority, randomized clinical trial, enrolling patients who underwent PCI with drug-eluting stent at 33 hospitals in Korea from March 2014 through July 2017. Clinical follow-up was extended to 3 years and completed in August 2020., Interventions: Patients were randomly assigned to either P2Y12 inhibitor monotherapy after 3 months of DAPT or DAPT for 12 months or longer., Main Outcomes and Measures: The primary end point was major adverse cardiac and cerebrovascular events (a composite of all-cause death, myocardial infarction, or stroke) at 3 years. The secondary end points included the components of the primary end point, bleeding (defined as Bleeding Academic Research Consortium [BARC] types 2-5), and major bleeding (BARC types 3-5)., Results: In total, 2993 patients were randomly assigned to receive P2Y12 inhibitor monotherapy after 3 months of DAPT (1495 patients [50%]; mean [SD] age, 64.6 [10.7] years; 1087 [72.7%] male) or prolonged DAPT (1498 patients [50%]; mean [SD] age, 64.6 [10.7] years; 1111 [74.2%] male) after PCI. At 3 years, the primary end point occurred in 87 individuals (6.3%) in the P2Y12 inhibitor monotherapy group and 83 (6.1%) in the prolonged DAPT group (hazard ratio [HR], 1.06 [95% CI, 0.79-1.44]; P = .69). P2Y12 inhibitor monotherapy significantly reduced the risk of bleeding (BARC types 2-5: 112 [3.2%] vs 44 [8.2%]; HR, 0.39 [95% CI, 0.28-0.55]; P < .001) and major bleeding (BARC types 3-5; 17 [1.2%] vs 31 [2.4%]; HR, 0.56 [95% CI, 0.31-0.99]; P = .048), compared with prolonged DAPT. The landmark analyses between 3 months and 3 years and per-protocol analyses showed consistent results., Conclusions and Relevance: Among patients who underwent PCI and completed 3-month DAPT, P2Y12 inhibitor monotherapy was associated with a lower risk of clinically relevant major bleeding than prolonged DAPT. Although the 3-year risk of ischemic cardiovascular events was comparable between the 2 groups, this result should be interpreted with caution owing to the limited number of events and sample size., Trial Registration: ClinicalTrials.gov Identifier: NCT02079194.
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- 2022
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36. A study of the therapeutic mechanism of Jakyakgamcho-Tang about functional dyspepsia through network pharmacology research.
- Author
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Choi WG, Choi NR, Park EJ, and Kim BJ
- Subjects
- Network Pharmacology, Calcium, Phosphatidylinositol 3-Kinases genetics, Cytokines, Dyspepsia drug therapy, Drugs, Chinese Herbal pharmacology, Drugs, Chinese Herbal therapeutic use, Drugs, Chinese Herbal chemistry, Plants, Medicinal chemistry
- Abstract
Herbal medicines have traditionally been used as an effective digestive medicine. However, compared to the effectiveness of Herbal medicines, the treatment mechanism has not been fully identified. To solve this problem, a system-level treatment mechanism of Jakyakgamcho-Tang (JGT), which is used for the treatment of functional dyspepsia (FD), was identified through a network pharmacology study. The two components, paeoniae radix alba and licorice constituting JGT were analyzed based on broad information on chemical and pharmacological properties, confirming 84 active chemical compounds and 84 FD-related targets. The JGT target confirmed the relationship with the regulation of various biological movements as follows: cellular behaviors of muscle and cytokine, calcium ion concentration and homeostasis, calcium- and cytokine-mediated signalings, drug, inflammatory response, neuronal cells, oxidative stress and response to chemical. And the target is enriched in variety FD-related signaling as follows: MAPK, Toll-like receptor, NOD-like receptor, PI3K-Akt, Apoptosis and TNF signaling pathway. These data give a new approach to identifying the molecular mechanisms underlying the digestive effect of JGT., Competing Interests: Competing Interests: The authors have declared that no competing interest exists., (© The author(s).)
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- 2022
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37. Secular trends and determinants of influenza vaccination uptake among patients with cardiovascular disease in Korea: Analysis using a nationwide database.
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Kim M, Yang B, Gu S, Kim EG, Kim SR, Oh KS, Yoon WS, Bae DH, Lee JH, Kim SM, Choi WG, Bae JW, Hwang KK, Kim DW, Cho MC, Lee H, and Lee DI
- Abstract
Background: Influenza vaccination reduces cardiovascular events in patients with cardiovascular disease (CVD). Identifying the factors that affect influenza vaccination uptake can help improve the prognosis in patients with CVD. This study aimed to evaluate the secular trends of influenza vaccination uptake and factors associated with lack of vaccination in individuals with CVD., Materials and Methods: We analyzed the annual trends and factors associated with influenza vaccination among 3,264 patients with CVD, included from the Korea National Health and Nutrition Examination Survey which reflect the health and nutritional status of the nationwide population of Korea conducted between 2007/2008 and 2018/2019. We used a stratified, multistage sampling method., Results: The influenza vaccination rate was greater in patients with CVD (53-74%) than in those without CVD (28-40%). Multivariable logistic regression analysis showed that age <50 years [odds ratio (OR), 16.22; 95% confidence interval (CI), 7.72-34.07], 50-64 years (OR, 6.71; 95% CI, 4.37-10.28), male sex (OR, 1.45; 95% CI, 1.14-1.65), and asthma (OR, 0.45; 95% CI, 0.22-0.92) were independently associated with a lack of influenza vaccination. Among patients aged <65 years, smoking (OR, 2.30; 95% CI, 1.31-4.04), college graduation status (OR, 1.81; 95% CI, 1.16-2.82), and hypertension (OR, 0.70; 95% CI, 0.51-0.95) were independently associated with influenza vaccination. For individuals aged 65years, there was no significant determinant of lack of vaccination., Conclusion: In patients with CVD, a continuous increase in the secular trend of influenza vaccination was demonstrated in Korea. Young age, male sex, and non-asthma status were independently associated with lack of influenza vaccination uptake., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2022 Kim, Yang, Gu, Kim, Kim, Oh, Yoon, Bae, Lee, Kim, Choi, Bae, Hwang, Kim, Cho, Lee and Lee.)
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- 2022
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38. [6]-Gingerol induces Caspase-Dependent Apoptosis in Bladder Cancer cells via MAPK and ROS Signaling.
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Choi NR, Choi WG, Kwon MJ, Woo JH, and Kim BJ
- Subjects
- Apoptosis, Catechols, Cell Line, Tumor, Fatty Alcohols, Humans, Membrane Potential, Mitochondrial, Reactive Oxygen Species metabolism, Zingiber officinale metabolism, Urinary Bladder Neoplasms drug therapy
- Abstract
The anti-cancer effects of [6]-gingerol ([6]-GIN), the main active polyphenol of ginger ( Zingiber officinale ), were investigated in the human bladder cancer cell line 5637. [6]-GIN inhibited cell proliferation, increased sub‑G1 phase ratios, and depolarized mitochondrial membrane potential. [6]-GIN-induced cell death was associated with the downregulation of B‑cell lymphoma 2 (BCL‑2) and survivin and the upregulation of Bcl‑2‑associated X protein (Bax). [6]-GIN activated caspase‑3 and caspase-9 and regulated the activation of mitogen-activated protein kinases (MAPKs). Further, [6]-GIN also increased the intracellular reactive oxygen species (ROS) levels and TG100-115 or tranilast increased [6]-GIN‑induced cell death. These results suggest that [6]-GIN induced apoptosis in the bladder cancer cell line 5637 and therefore has the potential to be used in the development of new drugs for bladder cancer treatment., Competing Interests: Competing Interests: The authors have declared that no competing interest exists., (© The author(s).)
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- 2022
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39. Grape seed powder increases gastrointestinal motility.
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Choi NR, Kim JN, Kwon MJ, Lee JR, Kim SC, Lee MJ, Choi WG, and Kim BJ
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- Animals, Gastrointestinal Motility, Intestine, Small, Membrane Potentials, Mice, Patch-Clamp Techniques, Powders pharmacology, Seeds, Vitis
- Abstract
Grape seed is an important natural bioactive product with various health benefits. Interstitial cells of Cajal (ICCs) are pacemaker cells in the gastrointestinal (GI) tract. The present study investigated the effects of grape seed powder (GSP) on ICC properties and GI motility. GSP depolarized the pacemaker potentials of ICCs in a dose‑dependent manner. Y25130 or SB269970 slightly inhibited GSP‑induced effects. However, Y25130 and SB269970 together completely blocked GSP-induced effects. In the presence of inhibitors of protein kinase C, protein kinase A, or mitogen-activated protein kinase, GSP‑induced ICC depolarization was inhibited. GSP increased the intestinal transit rate in normal mice and in mice with acetic acid-induced GI motility disorder. In addition, the levels of motilin and substance P were elevated after GSP dosing. These results demonstrate that GSP can regulate GI motility, and therefore, it is a potential therapeutic agent for treating GI motility disorders., Competing Interests: Competing Interests: The authors have declared that no competing interest exists., (© The author(s).)
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- 2022
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40. Ambulatory blood pressure response to S-amlodipine in Korean adult patients with uncontrolled essential hypertension: A prospective, observational study.
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Kim DK, Ahn JH, Lee KH, Kang SH, Kim SS, Na JO, Park SD, Ahn KT, Lee JH, Jung IH, Seo J, and Choi WG
- Subjects
- Adult, Aged, Antihypertensive Agents adverse effects, Blood Pressure, Blood Pressure Monitoring, Ambulatory, Double-Blind Method, Essential Hypertension drug therapy, Humans, Prospective Studies, Republic of Korea epidemiology, Tetrazoles pharmacology, Amlodipine adverse effects, Hypertension
- Abstract
Although amlodipine is recommended as the first-line therapy for the treatment of hypertension, its use is limited by its potential side effects. S-amlodipine is expected to be able to minimize side effects of amlodipine with a similar antihypertensive effect by removing the malicious R-chiral form. However, sustainable blood pressure control with S-amlodipine has not been well established yet. The purpose of the current study was to evaluate ambulatory blood pressure (ABP) profiles before and after a 12-week treatment of S-amlodipine. Patients received once-daily S-amlodipine 2.5 or 5 mg. ABP during 24 hr and office blood pressure were measured at baseline and after the 12-week treatment. Primary endpoints were changes of systolic and diastolic 24 hr ABP. After 12-week S-amlodipine treatment, mean systolic ABP (-15.1 ± 16.2 mmHg, p < .001) and diastolic ABP (-8.9 ± 9.8 mmHg, p < .001) were decreased significantly. Both daytime and night-time mean systolic BP and diastolic BP were also significantly decreased after the 12-week treatment. Global trough-to-peak ratio and smoothness index after 12-week S-amlodipine treatment were .75 and .79 for SBP and .65 and .61 for DBP, respectively. Age ≥65 years (hazard ratio [HR]: 3.13; 95% confidence interval [CI]: 1.67-14.3) and nonalcohol drinking (HR: 3.09; 95% CI: 1.34-7.17) were independent clinical factors for target ABP achievement. Adverse drug reactions (ADR) were developed in 16 (6.4%) patients, including two (.8%) cases of peripheral edema. In conclusion, this study demonstrated the efficacy and safety of S-amlodipine in patients with uncontrolled essential hypertension., (© 2022 The Authors. The Journal of Clinical Hypertension published by Wiley Periodicals LLC.)
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- 2022
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41. Non-invasive ultrasonic inspection of sludge accumulation in a pipe.
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Piao C, Kim SH, Lee JK, Choi WG, and Kim YY
- Abstract
Sludge accumulated inside a fluid-flowing pipe used in a chemical or semiconductor processing factory should be periodically removed to avoid flow blockage that increases undesirable pressure inside the pipe. Accordingly, it is common practice to periodically dismantle a pipe system, clean up the accumulate sludge, and reassemble. Therefore, an accurate estimation of sludge accumulation in the pipe is important to minimize the halting time of a chemical process using the system. Considering the lack of a practically efficient, non-invasive method to estimate the severity of sludge accumulation without interrupting the on-going chemical process, we propose an ultrasonic, non-invasive, real-time inspection method using a pair of ultrasonic wedge transducers installed circumferentially on the outer wall of a pipe at the same axial coordinate. To detect lowly accumulated sludge, an ultrasonic wave path from a transmitting transducer via a test pipe with accumulated sludge to a receiving transducer is carefully designed. The severity of sludge accumulation can then be determined by the amplitude of the longitudinal wave picked up by another transducer installed on the other side of the wall. We performed a series of experiments with steel and PVC pipes that are partially filled with water and sludge of different heights. The experimental results confirmed the effectiveness and practical viability of the proposed inspection method., (Copyright © 2021 Elsevier B.V. All rights reserved.)
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- 2022
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42. Before Coronary CTO PCI: Burden or Location?
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Choi WG
- Abstract
Competing Interests: The author has no financial conflicts of interest.
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- 2022
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43. Beyond hydrophilic polymers in amphiphilic polymer-based self-assembled NanoCarriers: Small hydrophilic carboxylate-capped disulfide drug delivery system and its multifunctionality and multispatial targetability.
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Choi YS, Cho H, Choi WG, Lee SS, Huh KM, Shim MS, Park IS, Cho YY, Lee JY, Lee HS, and Kang HC
- Subjects
- Animals, Carboxylic Acids, Disulfides, Doxorubicin chemistry, Doxorubicin pharmacology, Drug Carriers chemistry, Drug Delivery Systems, Humans, Hydrophobic and Hydrophilic Interactions, Mice, Nanoparticles chemistry, Polymers chemistry
- Abstract
Due to increasing safety and intracellular delivery concerns about hydrophilic polymers in amphiphilic polymer-based nanoparticles (NPs), this study investigates small hydrophilic molecule-stabilized NPs for effective intracellular delivery with multiorganelle targetability and dual responsiveness to acidic pH/glutathione (GSH). In the construction of small hydrophilic molecule-stabilized NP (MSPCL-NP), the A-B-A-type amphiphilic polymer (MSPCL-P) is composed of two short hydrophilic carboxylate-capped disulfide derivatives (A) that replace hydrophilic polymers and assist in providing colloidal stability and preventing antibody (e.g., at least anti-PEG antibody)-mediated specific interactions and complement activation in the plasma and a hydrophobic multiple disulfide-containing poly(ε-caprolactone) block (B) that carries hydrophobic drugs. The carboxylates on the surface of MSPCL-NP target the acidic extratumoral/endolysosomal milieu by sensing and buffering acidic pH values, and the hydrophobic carboxylic acids improve adsorptive endocytosis and effective endosomal escape. Multiple disulfide linkages selectively target cytosolic GSH, resulting in rapid drug release from the destroyed MSPCL-NP via the cleavage of disulfide bonds in MSPCL-P. Doxorubicin (DOX)-loaded NP (DOX@MSPCL-NP) exerts strong effects on killing cells in vitro and inhibits tumor growth in HCT116 xenograft tumor-bearing mice. In conclusion, the multifunctionality and multispatial targetability of MSPCL-NP might effectively overcome various sequential drug delivery hurdles, ranging from blood circulation to drug release. Furthermore, the introduction of small hydrophilic molecules represents a potential strategy to make self-assembled NPs without the use of hydrophilic polymers., (Copyright © 2021 Elsevier Ltd. All rights reserved.)
- Published
- 2022
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44. Impact of initial very low-level low-density lipoprotein cholesterol on the prognosis of acute myocardial infarction patients.
- Author
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Choi WG, Baek MJ, Rha SW, Choi BG, Ryu YG, Lee CH, Choi CU, Park CG, Seo HS, and Jeong MH
- Subjects
- Aged, Female, Humans, Kaplan-Meier Estimate, Lipoproteins, LDL blood, Male, Middle Aged, Myocardial Infarction epidemiology, Myocardial Infarction mortality, Prognosis, Proportional Hazards Models, Republic of Korea epidemiology, Risk Factors, Lipoproteins, LDL analysis, Myocardial Infarction complications
- Abstract
Background: Cholesterol control with statins has been shown to have beneficial effects in coronary artery disease. However, the relationship between initial very low low-density lipoprotein (LDL) cholesterol levels and long-term clinical outcomes in patients with acute myocardial infarction (AMI) remains unclear., Methods: A total of 8741 (mean age: 64.6 ± 12.7 years, men) consecutive AMI patients treated with drug-eluting stents were entered into the Korea Acute Myocardial Infarction Registry from November 2011 to December 2015. Patients were divided into six groups according to whether they were taking statins (on-statin group) or not (statin naive group) and depending on their LDL cholesterol level at admission (<70, 70-99, 100-129, 130-159, >160 mg/dl). Clinical outcomes at 24 months in patients with AMI were examined., Results: The incidence of risk factors including hypertension, diabetes, coronary artery disease and heart failure was lower as LDL cholesterol increased, except in the on-statin group. Clinical outcomes, including total mortality at 24 months, showed better outcomes in those with high LDL cholesterol than those with low LDL cholesterol, except in the statin group. In the statin-naïve group, the higher the LDL cholesterol level, the higher the rate of 24-month survival. In a Cox regression model, initial low LDL cholesterol was an independent predictor of mortality at 24 months after adjusting for baseline confounding factors., Conclusions: At admission, a very low LDL cholesterol level (<70 mg/dL) in statin-naïve AMI patients undergoing percutaneous coronary intervention was independently associated with higher mortality at 24 months., (Copyright © 2021 Wolters Kluwer Health, Inc. All rights reserved.)
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- 2022
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45. A Ratiometric Calcium Reporter CGf Reveals Calcium Dynamics Both in the Single Cell and Whole Plant Levels Under Heat Stress.
- Author
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Weigand C, Kim SH, Brown E, Medina E, Mares M 3rd, Miller G, Harper JF, and Choi WG
- Abstract
Land plants evolved to quickly sense and adapt to temperature changes, such as hot days and cold nights. Given that calcium (Ca
2+ ) signaling networks are implicated in most abiotic stress responses, heat-triggered changes in cytosolic Ca2+ were investigated in Arabidopsis leaves and pollen. Plants were engineered with a reporter called CGf, a ratiometric, genetically encoded Ca2+ reporter with an m C herry reference domain fused to an intensiometric Ca2+ reporter G CaMP6 f . Relative changes in [Ca2+ ]cyt were estimated based on CGf's apparent KD around 220 nM. The ratiometric output provided an opportunity to compare Ca2+ dynamics between different tissues, cell types, or subcellular locations. In leaves, CGf detected heat-triggered cytosolic Ca2+ signals, comprised of three different signatures showing similarly rapid rates of Ca2+ influx followed by differing rates of efflux (50% durations ranging from 5 to 19 min). These heat-triggered Ca2+ signals were approximately 1.5-fold greater in magnitude than blue light-triggered signals in the same leaves. In contrast, growing pollen tubes showed two different heat-triggered responses. Exposure to heat caused tip-focused steady growth [Ca2+ ]cyt oscillations to shift to a pattern characteristic of a growth arrest (22%), or an almost undetectable [Ca2+ ]cyt (78%). Together, these contrasting examples of heat-triggered Ca2+ responses in leaves and pollen highlight the diversity of Ca2+ signals in plants, inviting speculations about their differing kinetic features and biological functions., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2021 Weigand, Kim, Brown, Medina, Mares, Miller, Harper and Choi.)- Published
- 2021
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46. Aquaporin family lactic acid channel NIP2;1 promotes plant survival under low oxygen stress in Arabidopsis.
- Author
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Beamer ZG, Routray P, Choi WG, Spangler MK, Lokdarshi A, and Roberts DM
- Subjects
- Gene Expression Regulation, Plant, Genes, Plant, Hypoxia genetics, Plants, Genetically Modified, Adaptation, Physiological genetics, Aquaporins genetics, Aquaporins metabolism, Arabidopsis genetics, Arabidopsis metabolism, Hypoxia metabolism, Lactic Acid metabolism
- Abstract
Under anaerobic stress, Arabidopsis thaliana induces the expression of a collection of core hypoxia genes that encode proteins for an adaptive response. Among these genes is NIP2;1, which encodes a member of the "Nodulin 26-like Intrinsic Protein" (NIP) subgroup of the aquaporin superfamily of membrane channel proteins. NIP2;1 expression is limited to the "anoxia core" region of the root stele under normal growth conditions, but shows substantial induction (up to 1,000-fold by 2-4 h of hypoxia) by low oxygen stress, and accumulation in all root tissues. During hypoxia, NIP2;1-GFP accumulates predominantly on the plasma membrane by 2 h, is distributed between the plasma and internal membranes during sustained hypoxia, and remains elevated in root tissues through 4 h of reoxygenation recovery. In response to hypoxia challenge, T-DNA insertion mutant nip2;1 plants exhibit elevated lactic acid within root tissues, reduced efflux of lactic acid, and reduced acidification of the external medium compared to wild-type plants. Previous biochemical evidence demonstrates that NIP2;1 has lactic acid channel activity, and our work supports the hypothesis that NIP2;1 prevents lactic acid toxicity by facilitating release of cellular lactic acid from the cytosol to the apoplast, supporting eventual efflux to the rhizosphere. In evidence, nip2;1 plants demonstrate poorer survival during argon-induced hypoxia stress. Expressions of the ethanolic fermentation transcript Alcohol Dehydrogenase1 and the core hypoxia-induced transcript Alanine Aminotransferase1 are elevated in nip2;1, and expression of the Glycolate Oxidase3 transcript is reduced, suggesting NIP2;1 lactic acid efflux regulates other pyruvate and lactate metabolism pathways., (© American Society of Plant Biologists 2021. All rights reserved. For permissions, please email: journals.permissions@oup.com.)
- Published
- 2021
- Full Text
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47. Inhibiting serotonin signaling through HTR2B in visceral adipose tissue improves obesity-related insulin resistance.
- Author
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Choi WG, Choi W, Oh TJ, Cha HN, Hwang I, Lee YK, Lee SY, Shin H, Lim A, Ryu D, Suh JM, Park SY, Choi SH, and Kim H
- Subjects
- Adipocytes cytology, Adipocytes, White, Adipose Tissue, Adipose Tissue, White metabolism, Adult, Animals, Diet, High-Fat, Epididymis, Female, Glycerol metabolism, Humans, Inflammation, Insulin metabolism, Lipolysis, Male, Mice, Mice, Inbred C57BL, Mice, Knockout, Middle Aged, Phosphorylation, Signal Transduction, Young Adult, Insulin Resistance, Intra-Abdominal Fat metabolism, Obesity metabolism, Receptor, Serotonin, 5-HT2B metabolism, Serotonin metabolism
- Abstract
Insulin resistance is a cornerstone of obesity-related complications such as type 2 diabetes, metabolic syndrome, and nonalcoholic fatty liver disease. A high rate of lipolysis is known to be associated with insulin resistance, and inhibiting adipose tissue lipolysis improves obesity-related insulin resistance. Here, we demonstrate that inhibition of serotonin (5-hydroxytryptamine [5-HT]) signaling through serotonin receptor 2B (HTR2B) in adipose tissues ameliorates insulin resistance by reducing lipolysis in visceral adipocytes. Chronic high-fat diet (HFD) feeding increased Htr2b expression in epididymal white adipose tissue, resulting in increased HTR2B signaling in visceral white adipose tissue. Moreover, HTR2B expression in white adipose tissue was increased in obese humans and positively correlated with metabolic parameters. We further found that adipocyte-specific Htr2b-knockout mice are resistant to HFD-induced insulin resistance, visceral adipose tissue inflammation, and hepatic steatosis. Enhanced 5-HT signaling through HTR2B directly activated lipolysis through phosphorylation of hormone-sensitive lipase in visceral adipocytes. Moreover, treatment with a selective HTR2B antagonist attenuated HFD-induced insulin resistance, visceral adipose tissue inflammation, and hepatic steatosis. Thus, adipose HTR2B signaling could be a potential therapeutic target for treatment of obesity-related insulin resistance.
- Published
- 2021
- Full Text
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48. Pharmacokinetics of α-amanitin in mice using liquid chromatography-high resolution mass spectrometry and in vitro drug-drug interaction potentials.
- Author
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Park R, Choi WG, Lee MS, Cho YY, Lee JY, Kang HC, Sohn CH, Song IS, and Lee HS
- Subjects
- Animals, Chromatography, Liquid, Dose-Response Relationship, Drug, Drug Interactions, Humans, Liver enzymology, Male, Mass Spectrometry, Mice, Mice, Inbred ICR, Microsomes metabolism, Alpha-Amanitin pharmacokinetics, Poisons pharmacokinetics
- Abstract
The aim of this study was to determine pharmacokinetics of α-amanitin, a toxic bicyclic octapeptide isolated from the poisonous mushrooms, following intravenous (iv) or oral (po) administration in mice using a newly developed and validated liquid chromatography-high resolution mass spectrometry. The iv injected α-amanitin disappeared rapidly from the plasma with high a clearance rate (26.9-30.4 ml/min/kg) at 0.1, 0.2, or 0.4 mg/kg doses, which was consistent with a rapid and a major excretion of α-amanitin via the renal route (32.6%). After the po administration of α-amanitin at doses of 2, 5, or 10 mg/kg to mice, the absolute bioavailability of α-amanitin was 3.5-4.8%. Due to this low bioavailability, 72.5% of the po administered α-amanitin was recovered from the feces. When α-amanitin is administered po, the tissue to plasma area under the curve ratio was higher in stomach > large intestine > small intestine > lung ~ kidneys > liver but not detected in brain, heart, and spleen. The high distribution of α-amanitin to intestine, kidneys, and liver is in agreement with the previously reported major intoxicated organs following acute α-amanitin exposure. In addition, α-amanitin weakly or negligibly inhibited cytochrome P450 and 5'-diphospho-glucuronosyltransferase enzymes activity in human liver microsomes as well as major drug transport functions in mammalian cells overexpressing transporters. Data suggested remote drug interaction potential may be associated with α-amanitin exposure.
- Published
- 2021
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49. Dynamic tracking and identification of tissue-specific secretory proteins in the circulation of live mice.
- Author
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Kim KE, Park I, Kim J, Kang MG, Choi WG, Shin H, Kim JS, Rhee HW, and Suh JM
- Subjects
- Animals, HEK293 Cells, HeLa Cells, Hep G2 Cells, Humans, Liver metabolism, Liver pathology, Mice, Mice, Inbred C57BL, NIH 3T3 Cells, Proteome metabolism, Proteomics, Endoplasmic Reticulum metabolism, SEC Translocation Channels metabolism, Secretory Pathway physiology
- Abstract
Secretory proteins are an essential component of interorgan communication networks that regulate animal physiology. Current approaches for identifying secretory proteins from specific cell and tissue types are largely limited to in vitro or ex vivo models which often fail to recapitulate in vivo biology. As such, there is mounting interest in developing in vivo analytical tools that can provide accurate information on the origin, identity, and spatiotemporal dynamics of secretory proteins. Here, we describe iSLET (in situ Secretory protein Labeling via ER-anchored TurboID) which selectively labels proteins that transit through the classical secretory pathway via catalytic actions of Sec61b-TurboID, a proximity labeling enzyme anchored in the ER lumen. To validate iSLET in a whole-body system, we express iSLET in the mouse liver and demonstrate efficient labeling of liver secretory proteins which could be tracked and identified within circulating blood plasma. Furthermore, proteomic analysis of the labeled liver secretome enriched from liver iSLET mouse plasma is highly consistent with previous reports of liver secretory protein profiles. Taken together, iSLET is a versatile and powerful tool for studying spatiotemporal dynamics of secretory proteins, a valuable class of biomarkers and therapeutic targets., (© 2021. The Author(s).)
- Published
- 2021
- Full Text
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50. Clinical Impact of after-consult clinic blood pressure: comparison with automated office blood pressure.
- Author
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Lee CH, Ahn JH, Ryu JH, and Choi WG
- Abstract
Background: It is most important to measure blood pressure (BP) exactly in treating hypertension. Recent recommendations for diagnosing hypertension clearly acknowledge that an increase in BP attributable to the "whitecoat response" is frequently associated with manual BP recordings performed in community-based practice. However, there was no data about after-consult (AC) BP that could reduce whitecoat effect. So we evaluated before-consult (BC) and AC routine clinic BP and research based automated office blood pressure (AOBP) measured., Methods: The study population consisted of 82 consecutive patients with hypertension between April 2019 and December 2019. We measured routine clinic BP and AOBP before and after see a doctor, respectively. Seated blood pressure and pulse are measured at each time after a rest period using an automated device as it offers reduced potential for observer biases. AOBP was measured and measuring BP 3 times un-observed. We compared each BP parameter for identifying exact resting BP state., Results: There was significant difference between BC and AC systolic BP (135.37 ± 16.90 vs. 131.95 ± 16.40 mmHg, p = 0.015). However there was no difference in the BC and AC diastolic blood pressure (73.75 ± 11.85 vs. 74.42 ± 11.71 mmHg, p = 0.415). In the AOBP comparison, there was also significant difference (BC systolic AOBP vs. AC systolic AOBP, 125.17 ± 14.41 vs. 122.98 ± 14.09 mmHg, p = 0.006; BC diastolic ABOB vs. AC diastolic AOBP, 71.99 ± 10.49 vs. 70.99 ± 9.83, p = 0.038)., Conclusions: In our study, AC AOBP was most lowest representing resting state. Although AC BP was higher than BC AOBP, it might be used as alternative measurement for reducing whitecoat effect in the routine clinical practice., (© 2021. The Author(s).)
- Published
- 2021
- Full Text
- View/download PDF
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