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Lee HW, Lee JK, Hwang YI, Seo H, Ahn JH, Kim SR, Kim HJ, Jung KS, Yoo KH, Kim DK. Spirometric Interpretation and Clinical Relevance According to Different Reference Equations. J Korean Med Sci 2024; 39:e20. [PMID: 38288534 PMCID: PMC10825457 DOI: 10.3346/jkms.2024.39.e20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 11/21/2023] [Indexed: 02/01/2024] Open
Abstract
BACKGROUND Global Lung Function Initiative (GLI)-2012 reference equation is currently suggested for interpretation of spirometry results and a new local reference equation has been developed in South Korea. However, lung function profiles according to the different reference equations and their clinical relevance have not been identified in chronic obstructive pulmonary disease (COPD) patients. METHODS Our cross-sectional study evaluated Choi's, Korean National Health and National Examination Survey (KNHANES)-VI, and GLI-2012 reference equations. We estimated the percentages of predictive forced expiratory volume in one second (FEV1) and airflow limitation severity according to reference equations and analyzed their associations with patient reported outcomes (PROs): COPD assessment test (CAT) score, St. George's Respiratory Questionnaire for COPD patients (SGRQ-C) score, and six minute walk distance (6MWD). RESULTS In the eligible 2,180 COPD patients, lower predicted values of FEV1 and forced vital capacity (FVC) were found in GLI-2012 compared to Choi's and KNHANES-VI equations. GLI-2012 equation resulted in a lower proportion of patients being classified as FEV1 < 80% or FVC < 80% compared to the other equations. However, the Z-scores of FEV1 and FVC were similar between the KNHANES-VI and GLI-2012 equations. Three reference equations exhibited significant associations between FEV1 (%) and patient-reported outcomes (CAT score, SGRQ-C score, and 6MWD). CONCLUSION GLI-2012 reference equation may not accurately reflect FEV1 (%) in the Korean population, but the Z-score using GLI-2012 equation can be a viable option for assessing FEV1 and airflow limitation in COPD patients. Similar to the other two equations, the GLI-2012 equation demonstrated significant associations with PROs.
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Affiliation(s)
- Hyun Woo Lee
- Division of Respiratory and Critical Care, Department of Internal Medicine, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul, Korea
| | - Jung-Kyu Lee
- Division of Respiratory and Critical Care, Department of Internal Medicine, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul, Korea
| | - Yong-Il Hwang
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Hyewon Seo
- Department of Internal Medicine, School of Medicine, Kyungpook National University, Daegu, Korea
| | - June Hong Ahn
- Department of Internal Medicine, Yeungnam University Medical Center, College of Medicine, Yeungnam University, Daegu, Korea
| | - Sung-Ryeol Kim
- Department of Internal Medicine, Yongin Severance Hospital, Yonsei University College of Medicine, Yongin, Korea
| | - Hyun Jung Kim
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Keimyung University Dongsan Hospital, Daegu, Korea
| | - Ki-Suck Jung
- Division of Pulmonary, Allergy and Critical Care Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - Kwang Ha Yoo
- Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea
| | - Deog Kyeom Kim
- Division of Respiratory and Critical Care, Department of Internal Medicine, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul, Korea.
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Lee HW, Lee JK, Lee MG, Shin KC, Ra SW, Kim TH, Hwang YI, Jung KS, Yoo KH, Kim DK. Risk Factors of Rapid FEV<sub>1</sub> Decline in a Real-World Chronic Obstructive Pulmonary Disease Cohort. Respiration 2022; 101:1078-1087. [DOI: 10.1159/000525871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 06/27/2022] [Indexed: 11/06/2022] Open
Abstract
<b><i>Background:</i></b> Rapid forced expiratory volume in 1 s (FEV<sub>1</sub>) decliners have been considered a unique subgroup of patients with chronic obstructive pulmonary disease (COPD). Rapid FEV<sub>1</sub> decline manifests early and is associated with poor prognosis. This necessitates the pre-emptive identification of risk factors for rapid FEV<sub>1</sub> decline. <b><i>Objectives:</i></b> We aimed to determine the risk factors and clinical outcomes in patients with COPD. <b><i>Methods:</i></b> This longitudinal, observational study was based on the Korea COPD Subgroup Study cohort (NCT02800499) from January 2012 to December 2019 across 54 medical centers in South Korea. Eligible patients were followed up for 3 years with serial spirometric tests. We calculated the annualized percentage change in FEV<sub>1</sub> from baseline. Rapid decliners were defined as the quartile of patients with the highest annualized percentage FEV<sub>1</sub> decline. <b><i>Results:</i></b> Of the 518 patients, 130 were rapid decliners who lost 6.2%/year and 100 mL/year of FEV<sub>1</sub>. The multivariable logistic regression identified male sex, current smoking, blood eosinophil count <150/µL, and high forced vital capacity as the independent risk factors for rapid FEV<sub>1</sub> decline. Among rapid decliners, the lung function deteriorated more rapidly in current smokers and patients with severe dyspnea, while triple combination therapy attenuated lung function decline in comparison with mono-bronchodilator therapy. Rapid decliners had a higher rate of severe exacerbation than nonrapid decliners (0.2/year vs. 0.1/year, <i>p</i> value = 0.032). <b><i>Conclusions:</i></b> We identified the independent risk factors for rapid FEV<sub>1</sub> decline. This information may assist physicians in the early detection and pertinent management of rapid decline among patients with COPD.
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Choi H, Park HA, Hyun IG, Kim JH, Hwang YI, Jang SH, Sim YS, Shin TR, Ko Y, Ban GY, Hong JY, Lee CY, Lee MG, Choi JH. Incidence and outcomes of adverse drug reactions to first-line anti-tuberculosis drugs and their effects on the quality of life: a multicenter prospective cohort study. Pharmacoepidemiol Drug Saf 2022; 31:1153-1163. [PMID: 35909258 DOI: 10.1002/pds.5513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 03/18/2022] [Accepted: 07/25/2022] [Indexed: 11/11/2022]
Abstract
BACKGROUND In tuberculosis (TB) treatment, adverse drug reactions (ADRs) can interrupt treatment and decrease the quality of life (QoL). We aimed to prospectively investigate the incidence of ADRs to first-line anti-TB drugs and related outcomes and QoL. METHODS Adult patients with TB who had been treated with first-line anti-TB drugs in five Korean hospitals were enrolled. ADR questionnaire surveys and blood tests were performed four times serially, and QoL was assessed on the fourth TB treatment week (± two weeks). RESULTS Of 410 enrolled patients with TB (males, 62%; mean age, 52.1 ± 18.1 years [those aged ≥65 years, 26.6%]), 67.8% experienced any ADRs (≥ grade 2) to TB drugs. The most common ADR was fatigue (53.2%), followed by itching (42.7%) and anorexia (41.7%). Older adult patients experienced relatively more ADRs, including anorexia, dyspepsia, rash, dizziness, anemia, abnormal hepatic/renal function tests, and increased uric acid levels (P < 0.05). Treatment regimens changed for 9.5% of patients owing to ADRs to anti-TB drugs. Patients with any ADRs and older adult patients had significantly lower QoL than their counterparts (P < 0.05). Old age (odds ratio [OR], 1.02) and being male (OR 2.65) were independently associated with ADRs, whereas active smoking (OR 4.73) and a relatively long treatment phase (OR 5.13) were independently associated with hepatotoxicity. CONCLUSION ADRs to first-line anti-TB drugs were common and related to relatively low QoL, especially among older adults. Although 9.5% of patients had ADR-related regimen changes, most patients with ADRs completed treatments successfully. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Hayoung Choi
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Internal Medicine, Hallym University Kangnam Sacred Heart Hospital, Seoul, Korea.,Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea
| | - Hang A Park
- Department of Emergency Medicine, Hallym University Dongtan Sacred Heart Hospital, Dongtan, Korea
| | - In Gyu Hyun
- Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea.,Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Internal Medicine, Hallym University Dongtan Sacred Heart Hospital, Dongtan, Korea
| | - Joo-Hee Kim
- Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea.,Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Yong-Il Hwang
- Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea.,Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Seung Hun Jang
- Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea.,Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Yun Su Sim
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Internal Medicine, Hallym University Kangnam Sacred Heart Hospital, Seoul, Korea.,Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea
| | - Tae Rim Shin
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Internal Medicine, Hallym University Kangnam Sacred Heart Hospital, Seoul, Korea.,Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea
| | - Yousang Ko
- Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea.,Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Internal Medicine, Hallym University Kangdong Sacred Heart Hospital, Seoul, Korea
| | - Ga Young Ban
- Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea.,Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Internal Medicine, Hallym University Kangdong Sacred Heart Hospital, Seoul, Korea
| | - Ji Young Hong
- Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea.,Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Internal Medicine, Hallym University Chuncheon Sacred Heart Hospital, Chuncheon, Korea
| | - Chang Youl Lee
- Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea.,Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Internal Medicine, Hallym University Chuncheon Sacred Heart Hospital, Chuncheon, Korea
| | - Myung Goo Lee
- Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea.,Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Internal Medicine, Hallym University Chuncheon Sacred Heart Hospital, Chuncheon, Korea
| | - Jeong-Hee Choi
- Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea.,Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Internal Medicine, Hallym University Dongtan Sacred Heart Hospital, Dongtan, Korea
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Choi H, Ko Y, Lee CY, Chung SJ, Kim HI, Kim JH, Park S, Hwang YI, Jang SH, Jung KS, Kim YK, Park JY. Impact of COVID-19 on TB epidemiology in South Korea. Int J Tuberc Lung Dis 2021; 25:854-860. [PMID: 34615583 DOI: 10.5588/ijtld.21.0255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
SETTING: Five referral hospitals, South Korea.OBJECTIVE: To assess epidemiological changes in TB before and during the COVID-19 pandemic.DESIGN: This was a multicentre cohort study of 3,969 patients diagnosed with TB.RESULTS: We analysed 3,453 patients diagnosed with TB prior to the COVID-19 pandemic (January 2016-February 2020) and 516 during the pandemic (March-November 2020). During the pandemic, the number of patients visits declined by 15% from the previous 4-year average, and the number of patients diagnosed with TB decreased by 17%. Patients diagnosed during the pandemic were older than those diagnosed before the pandemic (mean age, 60.2 vs. 56.6 years, P < 0.001). The proportion of patients to have primary TB at a younger age (births after 1980) among those diagnosed with TB was significantly lower during the pandemic than before (17.8% in 2020 vs. 23.5% in 2016, 24.0% in 2017, 22.5% in 2018, 23.5% in 2019; P = 0.005).CONCLUSIONS: The COVID-19 pandemic resulted in a reduction in the number of visits to respiratory departments, leading to fewer patients being diagnosed with TB. However, our results suggest that universal personal preventive measures help to suppress TB transmission in regions with intermediate TB burden.
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Affiliation(s)
- H Choi
- Department of Pulmonary, Allergy and Critical Care Medicine, Hallym University Kangnam Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea, Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea
| | - Y Ko
- Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea, Department of Pulmonary, Allergy and Critical Care Medicine, Hallym University Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea
| | - C Y Lee
- Department of Pulmonary, Allergy and Critical Care Medicine, Hallym University Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea, Department of Pulmonary, Allergy and Critical Care Medicine, Hallym University Chuncheon Sacred Heart Hospital, Hallym University College of Medicine, Chuncheon, Korea
| | - S J Chung
- Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea, Department of Pulmonary, Allergy and Critical Care Medicine, Hallym University Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Dongtan, Korea
| | - H I Kim
- Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea, Department of Pulmonary, Allergy and Critical Care Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - J-H Kim
- Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea, Department of Pulmonary, Allergy and Critical Care Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - S Park
- Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea, Department of Pulmonary, Allergy and Critical Care Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - Y I Hwang
- Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea, Department of Pulmonary, Allergy and Critical Care Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - S H Jang
- Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea, Department of Pulmonary, Allergy and Critical Care Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - K-S Jung
- Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea, Department of Pulmonary, Allergy and Critical Care Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - Y K Kim
- Division of Infectious Diseases, Department of Internal Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - J Y Park
- Lung Research Institute of Hallym University College of Medicine, Chuncheon, Korea, Department of Pulmonary, Allergy and Critical Care Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
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Lim JU, Kim DK, Lee MG, Hwang YI, Shin KC, In KH, Lee SY, Rhee CK, Yoo KH, Yoon HK. Clinical Characteristics and Changes of Clinical Features in Patients with Asthma-COPD Overlap in Korea according to Different Diagnostic Criteria. Tuberc Respir Dis (Seoul) 2020; 83:S34-S45. [PMID: 33045813 PMCID: PMC7837381 DOI: 10.4046/trd.2020.0031] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 10/13/2020] [Indexed: 12/11/2022] Open
Abstract
Background Asthma–chronic obstructive pulmonary disease (COPD) overlap (ACO) is a condition characterized by the overlapping clinical features of asthma and COPD. To evaluate the appropriateness of different sets of ACO definition, we compared the clinical characteristics of the previously defined diagnostic criteria and the specialist opinion in this study. Methods Patients enrolled in the KOrea COpd Subgroup Study (KOCOSS) were evaluated. Based on the questionnaire data, the patients were categorized into the ACO and non-ACO COPD groups according to the four sets of the diagnostic criteria. Results In total 1,475 patients evaluated: 202 of 1,475 (13.6%), 32 of 1,475 (2.2%), 178 of 1,113 (16.0%), and 305 of 1,250 (24.4%) were categorized as ACO according to the modified Spanish Society of Pneumonology and Thoracic Surgery (SEPAR), American Thoracic Society (ATS) Roundtable, Global Initiative for Asthma (GINA)/Global Initiative for Chronic Obstructive Lung Disease (GOLD) criteria, and the specialists diagnosis, respectively. The ACO group defined according to the GINA/GOLD criteria showed significantly higher St. George's Respiratory Questionnaire and COPD Assessment Test scores than the non-ACO COPD group. When the modified SEPAR definition was applied, the ACO group showed a significantly larger decrease in the forced expiratory volume in 1 second (FEV1, %). The ACO group defined by the ATS Roundtable showed significantly larger decrease in the forced vital capacity values compared to the non-ACO COPD group (–18.9% vs. –2.2%, p=0.007 and –412 mL vs. –17 mL, p=0.036). The ACO group diagnosed by the specialists showed a significantly larger decrease in the FEV1 (%) compared to the non-ACO group (–5.4% vs. –0.2%, p=0.003). Conclusion In this study, the prevalence and clinical characteristics of ACO varied depending on the diagnostic criteria applied. With the criteria which are relatively easy to use, defining ACO by the specialists diagnosis may be more practical in clinical applications.
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Affiliation(s)
- Jeong Uk Lim
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Deog Kyeom Kim
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, Republic of Korea
| | - Myung Goo Lee
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Hallym University Chuncheon Sacred Heart Hospital, Hallym University College of Medicine, Chuncheon, Republic of Korea
| | - Yong-Il Hwang
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Republic of Korea
| | - Kyeong-Cheol Shin
- Regional Center for Respiratory Disease, Yeungnam University Medical Center, Yeungnam University College of Medicine, Daegu, Republic of Korea
| | - Kwang Ho In
- Division of Respiratory and Critical Care Medicine, Department of Internal Medicine, Korea University College of Medicine, Seoul, Republic of Korea
| | - Sang Yeub Lee
- Department of Internal Medicine, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Republic of Korea
| | - Chin Kook Rhee
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Kwang Ha Yoo
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Republic of Korea
| | - Hyoung Kyu Yoon
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
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Choi HS, Yang DW, Rhee CK, Yoon HK, Lee JH, Lim SY, Kim YI, Yoo KH, Hwang YI, Lee SH, Park YB. The health-related quality-of-life of chronic obstructive pulmonary disease patients and disease-related indirect burdens. Korean J Intern Med 2020; 35:1136-1144. [PMID: 32066224 PMCID: PMC7487298 DOI: 10.3904/kjim.2018.398] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Accepted: 05/21/2019] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND/AIMS Many chronic obstructive pulmonary disease (COPD) patients have physical limitations. We investigated EuroQol five-dimensions five-level (EQ-5D-5L) of COPD patients to assess quality of life, and assessed indirect burden including time expenditure to visit doctor, home care rate, and caregiver related burden. METHODS We recruited 355 COPD patients according to severity of airflow limitation that severity was set at 10% mild, 40% moderate, 30% severe, and 20% very severe in two primary and 11 secondary/tertiary hospitals. Eligible patients were aged ≥ 40 years, who have been diagnosed with COPD for more than 1 year. Patients were recruited between June 2015 and October 2016. RESULTS The quality of life tended to decline with age, from mild to very severe impairment, as revealed by the EQ-5D-5L scores and the EQ visual analog scale. Family caregivers accompanied 22.6% of patients who visited outpatient clinics, and 25% of stage IV COPD patients. During emergency visits and hospitalization, this figure increased to > 60%. The home care rates were 28.5% for stage I patients, and 34.4, 31.8, and 52% for stage II to IV patients, respectively. The percentage of caregivers who stopped working was 13.6%. The EQ-5D index was strongly associated with the dyspnea scale (r = -0.64, p < 0.001). The average required time to see a doctor and visit the pharmacy was 154 minutes. CONCLUSION In patients with COPD, the EQ-5D index decreased and disease-related home caregiving increased with airflow limitation. We considered the caregiver- related burden when making a strategy for COPD management.
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Affiliation(s)
- Hye Sook Choi
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Kyung Hee University Medical Center, Seoul, Korea
| | - Dong-Wook Yang
- Graduate School of Public Health, Seoul National University, Seoul, Korea
| | - Chin Kook Rhee
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Hyoung Kyu Yoon
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Yeouido St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Jin Hwa Lee
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Ewha Womans University College of Medicine, Seoul, Korea
| | - Seong Yong Lim
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Yu-Il Kim
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Chonnam National University Hospital, Gwangju, Korea
| | - Kwang Ha Yoo
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Korea
| | - Yong-Il Hwang
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Sang Haak Lee
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, St. Paul’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Yong Bum Park
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Hallym University Kangdong Sacred Heart Hospital, Seoul, Korea
- Correspondence to Yong Bum Park, M.D. Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Internal Medicine, Hallym University Kangdong Sacred Heart Hospital, 150 Seongan-ro, Gangdong-gu, Seoul 05355, Korea Tel: +82-2-2225-2754, Fax: +82-2-2224-2569, E-mail:
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Cho HW, Kim HA, Kwon MJ, Koh SH, Kim JH, Kim HI, Park JY, Park SH, Hwang YI, Jang SH, Jung KS. Eosinophilic fasciitis: A case report with a brief literature review. Allergy Asthma Respir Dis 2020. [DOI: 10.4168/aard.2020.8.2.96] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Hyun-Woong Cho
- Division of Pulmonary, Allergy, and Critical Care Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - Hyun-Ah Kim
- Division of Rheumatology, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - Mi Jung Kwon
- Department of Pathology, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - Sung Hye Koh
- Department of Radiology, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - Joo-Hee Kim
- Division of Pulmonary, Allergy, and Critical Care Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - Hwan Il Kim
- Division of Pulmonary, Allergy, and Critical Care Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - Ji-Young Park
- Division of Pulmonary, Allergy, and Critical Care Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - Sung-Hoon Park
- Division of Pulmonary, Allergy, and Critical Care Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - Yong-Il Hwang
- Division of Pulmonary, Allergy, and Critical Care Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - Seung Hun Jang
- Division of Pulmonary, Allergy, and Critical Care Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - Ki-Suck Jung
- Division of Pulmonary, Allergy, and Critical Care Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
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Cho J, Lee CH, Hwang YI, Lee JH, Kim TH, Lee JH, Oh YM, Yoo KH, Jung KS, Lee SD. Outcome of Regular Inhaled Treatment in GOLD A Chronic Obstructive Pulmonary Disease Patients. Respiration 2019; 98:312-320. [PMID: 31461718 DOI: 10.1159/000495756] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Accepted: 11/24/2018] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND The 2017 Global Initiative for Chronic Obstructive Lung Disease (GOLD) recommends regular bronchodilator therapy in all group A patients with chronic obstructive pulmonary disease (COPD). OBJECTIVE The aim of this study was to evaluate whether regular inhaled treatment in group A patients with COPD improves their health outcomes, including exacerbations and symptoms. METHODS We recruited patients from 2 Korean prospective cohorts. Eligible COPD patients had a modified Medical Research Council (mMRC) dyspnea score of <2, a St. George's Respiratory Questionnaire for COPD (SGRQ-C) total score of <25, and had no more than 1 exacerbation and no hospitalizations during the previous year. Incidence rates of exacerbations and changes in symptom scores were analyzed. RESULTS After propensity score matching, there were 107 patient pairs, with and without regular inhaled treatment, who were followed up for mean times of 2.6 and 3.1 years, respectively. The incidence rates of exacerbations in those with and without regular treatment were not significantly different (incidence rate ratio 1.24 [95% CI 0.68 to 2.25]). Significant differences in favor of regular treatment were observed at 6 and 12 months for the SGRQ-C total scores (mean between-group difference -4.7 [95% CI -7.9 to -1.6] and -4.8 [95% CI -7.9 to -1.7], respectively). Regular treatment with a long-acting bronchodilator was also associated with significantly better scores on the SGRQ-C (mean between-group difference -5.0 [95% CI -8.6 to -1.4]) compared to no regular treatment at 12 months of follow-up. CONCLUSIONS Regular inhaled treatment in group A patients with COPD was associated with a symptomatic benefit but not with a reduction of exacerbation rates.
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Affiliation(s)
- Jaeyoung Cho
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University Hospital, Seoul, Republic of Korea
| | - Chang-Hoon Lee
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University Hospital, Seoul, Republic of Korea,
| | - Yong-Il Hwang
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Republic of Korea
| | - Jin Hwa Lee
- Department of Internal Medicine, Ewha Womans University Mokdong Hospital, College of Medicine, Ewha Womans University, Seoul, Republic of Korea
| | - Tae-Hyung Kim
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Hanyang University Guri Hospital, Hanyang University College of Medicine, Guri, Republic of Korea
| | - Ji-Hyun Lee
- Department of Internal Medicine, CHA Bundang Medical Center, CHA University, Seongnam, Republic of Korea
| | - Yeon-Mok Oh
- Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Kwang Ha Yoo
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul, Republic of Korea
| | - Ki-Suck Jung
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Internal Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Republic of Korea
| | - Sang-Do Lee
- Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
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Kim JK, Kim JH, Park HM, Jeong YS, Choi CJ, Na SK, Kim JH, Song YR, Hwang YI, Jang SH, Jung KS. Idiopathic hypereosinophilic syndrome presenting with urinary frequency, abdominal pain, and diarrhea. Allergy Asthma Respir Dis 2015. [DOI: 10.4168/aard.2015.3.1.77] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Ja-Kyung Kim
- Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Joo-Hee Kim
- Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Han-Min Park
- Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Yong-Seol Jeong
- Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Chung-Jo Choi
- Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Seong-Kyun Na
- Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Jong-Hyeok Kim
- Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Young-Rim Song
- Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Yong-Il Hwang
- Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Seung-Hun Jang
- Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Ki-Suck Jung
- Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Korea
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10
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Rhee CK, Yoo KH, Lee JH, Park MJ, Kim WJ, Park YB, Hwang YI, Kim YS, Jung JY, Moon JY, Rhee YK, Park HK, Lim JH, Park HY, Lee SW, Kim YH, Lee SH, Yoon HK, Kim JW, Kim JS, Kim YK, Oh YM, Lee SD, Kim HJ. Clinical characteristics of patients with tuberculosis-destroyed lung. Int J Tuberc Lung Dis 2013; 17:67-75. [PMID: 23232006 DOI: 10.5588/ijtld.12.0351] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
SETTING Multicentre study. OBJECTIVE To define the clinical characteristics of patients with tuberculosis (TB) destroyed lung due to past TB. DESIGN We reviewed patients with TB-destroyed lung between May 2005 and June 2011. RESULTS A total of 595 patients from 21 hospitals were enrolled. The mean age was 65.63 ± 0.47 (mean ± standard error); 60.5% were male. The mean number of lobes involved was 2.59 ± 0.05. Pleural thickening was observed in 54.1% of the patients. Mean forced vital capacity (FVC), forced expiratory volume in 1 s (FEV(1)), FEV(1)/FVC, bronchodilator response and number of exacerbations per year were respectively 2.06 ± 0.03 l (61.26% ± 0.79), 1.16 ± 0.02 l (49.05% ± 0.84), 58.03% ± 0.70, 5.70% ± 0.34, and 0.40 ± 0.04. The number of lobes involved was significantly correlated with FVC and FEV(1), and with the number of exacerbations per year. Use of long-acting muscarinic antagonists or long-acting beta-2 agonists plus inhaled corticosteroids resulted in bronchodilatory effects. Multivariable regression analysis showed that age, initial FEV(1) (%) and number of exacerbations during follow-up were independent factors affecting change in FEV(1). CONCLUSION Decreased lung function with exacerbation, and progressive decline of FEV(1) were observed in patients with TB-destroyed lung.
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Affiliation(s)
- C K Rhee
- Department of Internal Medicine, Seoul St. Mary's Hospital, Catholic University of Korea, Seoul, Korea
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11
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Kim DY, Hwang YI, Choi SU. Cloning of metK from Actinoplanes teichomyceticus ATCC31121 and effect of its high expression on antibiotic production. J Microbiol Biotechnol 2012; 21:1294-8. [PMID: 22210616 DOI: 10.4014/jmb.1101.01018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
A metK gene encoding S-adenosyl-L-methionine synthetase was cloned from the non-Streptomyces actinomycetes, Actinoplanes teichomyceticus ATCC31121. In order to evaluate the effect of the metK expression on antibiotic production in actinomycetes, an expression vector harboring the metK gene was constructed and introduced into Streptomyces lividans TK24 and A. teichomyceticus, and the antibiotic production of the exconjugants was assessed. As a result, it was determined that the expression of metK induced 17-fold and 2.2-fold increases in actinorhodin production from S. lividans TK24 and teicoplanin production from A. teichomyceticus, respectively, compared with the control strains.
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Affiliation(s)
- Du-Yeong Kim
- Department of Food Science and Biotechnology, Kyungnam University, Changwon 631-701, Korea
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12
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Yoon YH, Kawai F, Sugiyama K, Park SY, Nihira T, Choi SU, Hwang YI. Crystallization and preliminary crystallographic studies of the butyrolactone autoregulator receptor protein (BarA) from Streptomyces virginiae. Acta Crystallogr Sect F Struct Biol Cryst Commun 2010; 66:662-4. [PMID: 20516594 PMCID: PMC2882764 DOI: 10.1107/s1744309110009930] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2010] [Accepted: 03/17/2010] [Indexed: 11/10/2022]
Abstract
The Streptomyces butyrolactone autoregulator receptor protein (BarA) is a DNA-binding protein that regulates the biosynthesis of the antibiotic virginiamycin. In this study, BarA from S. virginiae was overexpressed in Escherichia coli, purified and crystallized. Crystals of purified protein have been grown that diffracted to beyond 3.0 A resolution at 100 K using synchrotron radiation. The protein crystals belonged to the hexagonal space group P6(5)22, with unit-cell parameters a = b = 128.0, c = 286.2 A. With four molecules per asymmetric unit, the crystal volume per unit protein mass (V(M)) was 3.2 A(3) Da(-1) and the solvent content was 62%.
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Affiliation(s)
- Young-Ho Yoon
- Protein Design Laboratory, Yokohama City University, 1-7-29 Suehiro, Tsurumi, Yokohama 230-0045, Japan
| | - Fumihiro Kawai
- Protein Design Laboratory, Yokohama City University, 1-7-29 Suehiro, Tsurumi, Yokohama 230-0045, Japan
| | - Kanako Sugiyama
- Protein Design Laboratory, Yokohama City University, 1-7-29 Suehiro, Tsurumi, Yokohama 230-0045, Japan
| | - Sam-Yong Park
- Protein Design Laboratory, Yokohama City University, 1-7-29 Suehiro, Tsurumi, Yokohama 230-0045, Japan
| | - Takuya Nihira
- International Center for Biotechnology, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Sun-Uk Choi
- Department of Food Science and Biotechnology, Kyungnam University, Masan 631-701, Republic of Korea
| | - Yong-Il Hwang
- Department of Food Science and Biotechnology, Kyungnam University, Masan 631-701, Republic of Korea
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13
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14
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Chun SY, Park KO, Park YB, Choi JH, Lee JY, Mo EK, Park SH, Kim CH, Lee CY, Hwang YI, Jang SH, Shin TR, Park SM, Kim DG, Lee MG, Hyun IG, Jung KS. Infection Rate of Chlamydia pneumoniaein Patients with Chronic Cough. Tuberc Respir Dis (Seoul) 2010. [DOI: 10.4046/trd.2010.69.6.426] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- Seung-Yeon Chun
- Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea
| | - Kwon-Oh Park
- Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea
| | - Yong-Bum Park
- Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea
| | - Jeong-Hee Choi
- Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea
| | - Jae-Young Lee
- Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea
| | - Eun-Kyung Mo
- Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea
| | - Sung-Hoon Park
- Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea
| | - Cheol-Hong Kim
- Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea
| | - Chang-Youl Lee
- Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea
| | - Yong-Il Hwang
- Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea
| | - Seung-Hun Jang
- Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea
| | - Tae-Rim Shin
- Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea
| | - Sang-Myeon Park
- Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea
| | - Dong-Gyu Kim
- Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea
| | - Myung-Goo Lee
- Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea
| | - In-Gyu Hyun
- Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea
| | - Ki-Suck Jung
- Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Korea
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15
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Kim JY, Yoon MY, Cha MR, Hwang JH, Park E, Choi SU, Park HR, Hwang YI. Methanolic extracts of Plocamium telfairiae induce cytotoxicity and caspase-dependent apoptosis in HT-29 human colon carcinoma cells. J Med Food 2008; 10:587-93. [PMID: 18158827 DOI: 10.1089/jmf.2007.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Natural marine products have recently become the focus of increased research interest, due to their potential pharmacological activities. Therefore, we have screened 50 varieties of marine seaweed and determined that the methanolic extracts from Plocamium telfairiae (PTE) exhibited a cytotoxic effect against HT-29 human colon carcinoma cells. In this study, we report on the cytotoxic activity and mechanism of PTE-induced apoptosis in HT-29 cells. The treatment of HT-29 cells with various PTE concentrations resulted in the inhibition of growth and the induction of apoptosis in a dose-dependent manner, as determined by the results of a 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide reduction assay, a lactate dehydrogenase release assay, a morphological assay, and a colony formation assay. Interestingly, we also detected apoptotic bodies on Hoechst staining and attempted to determine whether the PTE-induced apoptosis involved the caspase pathway, using a caspase colorimetric assay. The activation of caspases-8, -9, -3, and -7 and the specific proteolytic cleavage of poly(ADP-ribose) polymerase were detected over the course of apoptosis induction. Our results showed that PTE may function as a chemopreventive and/or chemotherapeutic agent in colon carcinoma cells via the reduction of cell viability and the induction of apoptosis.
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Affiliation(s)
- Ju-Young Kim
- Department of Food Science and Biotechnology, Kyungnam University, Masan, Republic of Korea
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16
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Hwang JH, Kim JY, Cha MR, Ryoo IJ, Choo SJ, Cho SM, Tsukumo Y, Tomida A, Shin-Ya K, Hwang YI, Yoo ID, Park HR. Etoposide-resistant HT-29 human colon carcinoma cells during glucose deprivation are sensitive to piericidin A, a GRP78 down-regulator. J Cell Physiol 2008; 215:243-50. [PMID: 17941090 DOI: 10.1002/jcp.21308] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Glucose deprivation, a pathophysiological cell condition, causes up-regulation of GRP78 and induction of etoposide resistance in human cancer cells. The induction of drug resistance can be partly explained by the fact that GRP78 can block activation of caspase-7 induced by treatment with etoposide. Therefore, downregulating GRP78 expression may be a novel strategy anticancer drug development. Based on that premise, we established a screening program for anticancer agents that exhibit preferential cytotoxic activity for etoposide-resistant cancer cells under glucose-deprived conditions. We recently isolated an active compound, AR-054, from the culture broth of Streptomyces sp., which prevents stress-induced etoposide resistance in vitro. AR-054 was identified as piericidin A, a prototypical compound, by ESI-MS analysis and various NMR spectroscopic methods. Here, we showed that piericidin A suppressed the accumulation of GRP78 protein and was also highly toxic to etoposide-resistant HT-29 cells, with IC50 values for colony formation of 6.4 and 7.7 nM under 2-deoxyglucose supplemented and glucose-deprived conditions, respectively. Interestingly, piericidin A had no effect under normal growth conditions. Therefore, we suggest that piericidin A prevents up-regulation of GRP78, and exhibits cytotoxicity in glucose-deprived HT-29 cells that are resistant to etoposide.
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Affiliation(s)
- Ji-Hwan Hwang
- Department of Food Science and Biotechnology, Kyungnam University, Masan, Korea
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17
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Kwon SY, Hwang YI, Yoon HI, Lee JH, Lee CT, Lee KW. Correlation between Expiratory Increase of Lung Attenuation and Age and Smoking in the Subjects with Normal Inspiratory Low Dose CT and Pulmonary Function Test. Tuberc Respir Dis (Seoul) 2008. [DOI: 10.4046/trd.2008.65.6.457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- Sung-Youn Kwon
- Respiratory Center, Seoul National University Bundang Hospital, Seongnam, Korea
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Yong-Il Hwang
- Department of Internal Medicine, Hallym University Sacred Heart Hospital, Seoul, Korea
| | - Ho-Il Yoon
- Respiratory Center, Seoul National University Bundang Hospital, Seongnam, Korea
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Jae-Ho Lee
- Respiratory Center, Seoul National University Bundang Hospital, Seongnam, Korea
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Choon-Taek Lee
- Respiratory Center, Seoul National University Bundang Hospital, Seongnam, Korea
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Kyung Won Lee
- Respiratory Center, Seoul National University Bundang Hospital, Seongnam, Korea
- Department of Radiology, Seoul National University Bundang Hospital, Seongnam, Korea
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18
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Choi SU, Kim MK, Ha HS, Hwang YI. In vivo functions of the gamma-butyrolactone autoregulator receptor in Streptomyces ambofaciens producing spiramycin. Biotechnol Lett 2007; 30:891-7. [PMID: 18058070 DOI: 10.1007/s10529-007-9613-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2007] [Accepted: 11/21/2007] [Indexed: 11/30/2022]
Abstract
A gene encoding a gamma-butyrolactone autoregulator receptor was cloned in to E. coli from Streptomyces ambofaciens producing spiramycin, a macrolide antibiotic used in both veterinary medicine and human medicine. A 714-bp intact receptor gene (saaR) was obtained by PCR and genomic Southern hybridization with the 100-bp PCR product as a probe. To clarify the in vivo function of saaR, a saaR-disrupted strain was constructed by means of homologous recombination, and phenotypes were compared with those of the wild-type strain. The number of saaR-disruptant spores was 4-fold less than that of the wild-type strain. In addition, saaR deletion from the S. ambofaciens chromosome resulted in complete loss of spiramycin production suggesting that saaR is a rare positive regulator, controlling both spiramycin biosynthesis and sporulation.
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Affiliation(s)
- Sun-Uk Choi
- Department of Food Science and Biotechnology, Kyungnam University, Masan, 631-701, Republic of Korea
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19
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Lee SH, Kim YH, Yu HJ, Cho NS, Kim TH, Kim DC, Chung CB, Hwang YI, Kim KH. Enhanced bioavailability of soy isoflavones by complexation with beta-cyclodextrin in rats. Biosci Biotechnol Biochem 2007; 71:2927-33. [PMID: 18071265 DOI: 10.1271/bbb.70296] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
In order to improve the solubility and bioavailability of a soy isoflavone extract (IFE), inclusion complexes (IFE-beta-CD) of the isoflavone extract with beta-cyclodextrin (beta-CD) were prepared and studied for their solubility and bioavailability. The aqueous solubility of the complexes of IFE with beta-CD (2.0 mg/ml) was about 26 times that of IFE itself (0.076 mg/ml). The same dosages of IFE and IFE-beta-CD were orally administered to SD rats (Sprague-Dawley) on an isoflavone glycoside (IFG) basis (daidzin, genistin and glycitin), and the plasma concentrations of daidzein, genistein and glycitein were measured over time to estimate the average AUC (area under the plasma concentration versus time curve) of the isoflavones. After the oral administration, the AUC values for daidzein, genistein and glycitein were 340, 11 and 28 microg x min/ml, respectively. In contrast, the respective AUC values after the administration of IFE-beta-CD were 430, 20 and 48 microg x min/ml. The bioavailability of daidzein in IFE-beta-CD was increased to 126% by the formation of inclusion complexes with beta-CD, compared with that in IFE. Furthermore, the bioavailability of genistein and glycitein in IFE-beta-CD formulation was significantly higher by up to 180% and 170%, respectively, compared with that of IFE p=0.008 and p=0.028, respectively). These results show that the absorption of IFE could be improved by the complexation of IFE with beta-CD (IFE-beta-CD).
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Affiliation(s)
- Seung-Hyun Lee
- R&D Center, Bioland Ltd., Ansan, Kyunggi, Republic of Korea
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20
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Yong Eom S, Bok Chung C, Sil Kim Y, Heon Kim J, Soo Kim K, Heui Kim Y, Hee Park S, Hwang YI, Ho Kim K. Cosmeceutical properties of polysaccharides from the root bark of Ulmus davidiana var. japonica. Int J Cosmet Sci 2007. [DOI: 10.1111/j.1467-2494.2007.00369_4.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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Eom SY, Chung CB, Kim YS, Kim JH, Kim KS, Kim YH, Park SH, Hwang YI, Kim KH. Cosmeceutical properties of polysaccharides from the root bark of Ulmus davidiana var. japonica. J Cosmet Sci 2006; 57:355-67. [PMID: 17111070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Accepted: 05/04/2006] [Indexed: 05/12/2023]
Abstract
In Korea and China, Ulmus davidiana var. japonica has been used as a traditional oriental medicine for the treatment of difficulty in urination, skin inflammation, etc. In order to investigate the potential of a polysaccharide extract from Ulmus davidiana var. japonica as a cosmetic ingredient, we measured its moisturizing effect, photo-induced cytotoxicity, and anti-inflammatory effect. After hydrolysis, HPLC experiments showed that the composition of the polysaccharide extract was mainly rhamnose, galactose, and glucose. The molecular weight of the obtained Ulmus davidiana root extract was 20,000. The intrinsic viscosity was 90 dl/g. In a moisturizing test conducted through the measurement of water loss in a desiccator and of moisture content with a Corneometer CM820, Ulmus davidiana root extract showed almost the same moisturizing effect as hyaluronic acid. In an assay for inhibition of the H(2)O(2)-activated release of PGE2, IL-6, and IL-8 in normal human fibroblast cell lines, Ulmus davidiana root extract showed an inhibitory activity of PGE2 release in a dose-dependent manner (up to 85.9% at a concentration of 0.1%). The percent inhibition of the release of IL-6 was in the range of 45.6% to 64.5% (H(2)O(2) was used as the positive control). Moreover, the release of IL-8 was completely inhibited in the entire concentration range (>0.0025%). In a test of recovery from photo-induced damage after UVA irradiation (3 J/cm(2)), the cell recovery of human fibroblasts increased to levels two times higher than that of the positive control, which was UVA-damaged cells in the absence of Ulmus davidiana root extract (up to 60.2% at 3.0% of Ulmus davidiana root extract). In a photo-induced cytotoxicity assay in the presence of promethazine as a photosensitizer, Ulmus davidiana root extract showed approximately 48% of the increased cell viability of the control. Therefore, Ulmus davidiana root extract may be useful for the development of a cosmetic ingredient.
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Affiliation(s)
- Sang Yong Eom
- R&D Center, Charmzone, Taejang 2, Wonju, Kangwon 220-962, Korea
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22
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Kim SW, Jo BK, Jeong JH, Choi SU, Hwang YI. Induction of extracellular matrix synthesis in normal human fibroblasts by anthraquinone isolated from Morinda citrifolia (Noni) fruit. J Med Food 2006; 8:552-5. [PMID: 16379572 DOI: 10.1089/jmf.2005.8.552] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In previous studies we found that Morinda citrifolia (Noni) fruit extract up-regulated biosynthesis of type I collagen and glycosaminoglycans in primary cultures of normal human fibroblasts. The objective of this study was to identify the active ingredients in Noni fruit extract. An active single compound having a type I collagen-stimulating effect was isolated and identified as 1,4-dihydroxy-2-methoxy-7-methylanthraquinone by nuclear magnetic resonance, infrared, and mass analysis. It was revealed that anthraquinone showed significantly increased elaboration of procollagen type I C-terminal peptide and glycosaminoglycans and reduced expression of the collagenase matrix metalloproteinase-1 dose-dependently in human dermal fibroblasts. Furthermore, in a clinical trial, a nano-emulsion containing anthraquinone predominantly increased the dermal type I procollagen in nude mouse skin. These results suggest that anthraquinone derived from Noni extract is a good candidate for use as a new anti-wrinkle agent due to its strong induction of biosynthetic activity of extracellular matrix components.
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Affiliation(s)
- Sung-Woo Kim
- Coreana Skin Science Research Center, Cheonan, Republic of Korea
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Lee MH, Lee HW, Park JH, Ahn JO, Jung JK, Hwang YI. Improved l-threonine production of Escherichia coli mutant by optimization of culture conditions. J Biosci Bioeng 2006; 101:127-30. [PMID: 16569607 DOI: 10.1263/jbb.101.127] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2005] [Accepted: 10/31/2005] [Indexed: 11/17/2022]
Abstract
L-threonine production was investigated in a minimal salt medium using L-threonine-overproducing Escherichia coli MT201, derived from E. coli K-12. It was observed that dry cell weight reached 12.5 g/l with 15.9 g/lL-threonine. To increase dry cell weight and L-threonine production, the fermentation process was optimized. When biotin was added as growth factor, L-threonine production reached 52.0 g/l from 15.9 g/l without biotin. Dry cell weight and L-threonine production were further increased by continuous feeding of the feed media with an optimized L-methionine concentration (5.0 g/l). However, high-cell-density culture caused oxygen-limited condition, which resulted in the accumulation of organic acids. To overcome this problem, oxygen-enriched air was supplied to the fermentor with the minimal salt medium. Under these optimal conditions, we achieved an L-threonine production of 80.2 g/l in the minimal salt medium.
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Affiliation(s)
- Man-Hyo Lee
- Division of Food and Biotechnology, Kyungnam University, 449 Wolyoung-dong, Masan 631-701, Republic of Korea
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Lee DH, Choi SU, Hwang YI. Culture Conditions and Characterizations of a New Phytase-Producing Fungal Isolate, Aspergillus sp. L117. Mycobiology 2005; 33:223-9. [PMID: 24049505 PMCID: PMC3774891 DOI: 10.4489/myco.2005.33.4.223] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2005] [Indexed: 06/02/2023]
Abstract
A novel fungal strain Aspergillus sp. L117 that produced acid-stable and thermostable phytase was isolated on basis of the clearing zone on PSM plate and the ability of Na-phytate hydrolysis. The phytase of isolate showed a 3-fold higher activity than that of A. ficuun NRRL3135. The Aspergillus sp. L117 produced maximal level of phytase at initial pH of 5.0 and 30℃. The optimal pH and temperature for phytase activity were 5.5 and 50℃, respectively. The phytase showed totally stable activity after 20 min of exposure between 30 and 90℃, and even at 100℃. The highest level of residual phytase activity was obtained at pH 5.5, and still retained the stability at the broadest pH ranges (2.0 to 7.0) of all the aforementioned phytases. Storage stability of phytase was preserved over 96% of initial activities for 60 days at 4, -20, and -70℃ and to retain even 70% of the initial activity at room temperature.
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Affiliation(s)
- Dae-Hee Lee
- Division of Food Science and Biotechnology, Kyungnam University, Masan 631-701, Korea
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Lee KM, Lee CK, Choi SU, Park HR, Kitani S, Nihira T, Hwang YI. Cloning and in vivo functional analysis by disruption of a gene encoding the gamma-butyrolactone autoregulator receptor from Streptomyces natalensis. Arch Microbiol 2005; 184:249-57. [PMID: 16228193 DOI: 10.1007/s00203-005-0047-7] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2005] [Revised: 09/15/2005] [Accepted: 09/19/2005] [Indexed: 11/24/2022]
Abstract
A gene encoding a gamma-butyrolactone autoregulator receptor, which has a common activity as DNA-binding transcriptional repressors controlling secondary metabolism and/or morphological differentiation in Streptomyces, was cloned from a natamycin producer, Streptomyces natalensis. PCR using the primers designed for the two highly conserved regions of Streptomyces autoregulator receptors (BarA, FarA, ScbR, and ArpA) gave a 102-bp band. The sequence of this band had a high similarity to the expected region of a receptor gene. By genomic Southern hybridization with the 102-bp insert as a probe, a 687-bp intact receptor gene (sngR) was obtained from S. natalensis. To clarify the in vivo function of sngR, a sngR-disrupted strain was constructed, and the phenotypes were compared with those of the wild-type strain. The sngR-disruptants started natamycin production 6 h earlier and showed a 4.6-fold higher production of natamycin than the wild-type strain. In addition, the sporulation began earlier and the number of spores was tenfold more abundant than that of the wild-type strain. All the phenotypes were restored back to the original phenotypes of the wild-type strain by complementation with the intact sngR, indicating that the autoregulator receptor protein of S. natalensis acts as a primary negative regulator both on the biosynthesis of natamycin and sporulation.
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Affiliation(s)
- Kang-Mu Lee
- Department of Food Science and Biotechnology, Division of Life Science, Kyungnam University, 449 Wolyong-Dong, Masan 631-701, Republic of Korea
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Choi SU, Paik HD, Lee SC, Nihira T, Hwang YI. Enhanced productivity of human lysozyme by pH-controlled batch fermentation of recombinant Saccharomyces cerevisiae. J Biosci Bioeng 2005; 98:132-5. [PMID: 16233679 DOI: 10.1016/s1389-1723(04)70255-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2004] [Accepted: 05/14/2004] [Indexed: 10/26/2022]
Abstract
Human lysozyme (HLY) was successfully produced by Saccharomyces cerevisiae with a plasmid (pHK501) containing a synthetic HLY gene connected with a native secretion-signal sequence under control of the promoter for the glyceraldehydes-3-phosphate dehydrogenase gene. For large-scale production, batch fermentation was adopted with 1 l SD (Leu(-)) minimal medium in a 2-l jar fermentor. While pH-uncontrolled fermentation gave 42.3 units/ml of HLY over a period of 72-h cultivation, HLY production increased to 74.5 units/ml by performing pH-controlled fermentation, although a longer fermentation time was needed for maximal HLY production. A pH-shift strategy was designed in this study, resulting in higher HLY production and a shorter fermentation time.
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Affiliation(s)
- Sun-Uk Choi
- International Center for Biotechnology, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
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Choi SU, Lee CK, Hwang YI, Kinoshita H, Nihira T. Cloning and functional analysis by gene disruption of a gene encoding a gamma-butyrolactone autoregulator receptor from Kitasatospora setae. J Bacteriol 2004; 186:3423-30. [PMID: 15150228 PMCID: PMC415744 DOI: 10.1128/jb.186.11.3423-3430.2004] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Gamma-butyrolactone autoregulator receptors of the genus Streptomyces have a common activity as DNA-binding transcriptional repressors, controlling secondary metabolism and/or morphological differentiation. A gene encoding a gamma-butyrolactone autoregulator receptor was cloned from a bafilomycin B1 producer, Kitasatospora setae, for the first time from a non-Streptomyces genus of actinomycetes, and its function was evaluated by in vitro and in vivo analyses. The gene fragment was initially cloned by PCR with primers designed from two highly conserved regions of Streptomyces autoregulator receptors (BarA, FarA, ScbR, and ArpA), followed by genomic Southern hybridization yielding a 7-kb BamHI fragment on which a 654-bp receptor gene (ksbA) was identified. The recombinant KsbA protein demonstrated clear binding activity toward 3H-labeled autoregulators, especially toward [3H]SCB1, confirming that ksbA encodes a real autoregulator receptor of K. setae. To clarify the in vivo function of ksbA, a ksbA-disrupted strain was constructed by means of homologous recombination after introducing a ksbA disruption construct via transconjugation from Escherichia coli. No difference in morphology was found between the wild-type strain and the ksbA disruptants. However, the ksbA disruptants started producing bafilomycin 18 h earlier than the wild-type strain and showed a 2.4-fold-higher accumulation of bafilomycin. The phenotype was restored to the original wild-type phenotype by complementation with intact ksbA, indicating that the autoregulator receptor protein of K. setae acts as a primary negative regulator of the biosynthesis of bafilomycin but plays no role in cytodifferentiation of K. setae. This indicates that, unlike the A-factor receptor of Streptomyces griseus, the autoregulator receptor (ksbA) of K. setae belongs to a family of autoregulator receptors which control secondary metabolism but play no role in morphological differentiation.
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Affiliation(s)
- Sun-Uk Choi
- International Center for Biotechnology, Osaka University, Suita, Osaka 565-0871, Japan
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Choi SU, Lee CK, Hwang YI, Kinoshita H, Nihira T. Intergeneric conjugal transfer of plasmid DNA from Escherichia coli to Kitasatospora setae , a bafilomycin B 1 producer. Arch Microbiol 2004; 181:294-8. [PMID: 14767637 DOI: 10.1007/s00203-004-0654-8] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2003] [Revised: 11/26/2003] [Accepted: 01/13/2004] [Indexed: 10/26/2022]
Abstract
An effective transformation procedure for Kitasatospora setae was established based on transconjugation from Escherichia coli ET12567 (pUZ8002) using a phi C31-derived integration vector, pSET152, containing oriT and attP fragments. While no transconjugation was observed under the standard transconjugation conditions for Streptomyces species, sufficient transconjugation (>1 x 10(-6)) was achieved on ISP4 medium containing 30 mM MgCl(2) using a 25- to 125-fold excess of E. coli donor cells. In addition, the sequence and location of the chromosomal integration site attB of K. setae was identified for the first time in genera of non- Streptomyces actinomycetes. K. setae contains a single phi C31 attB site. Similar to the case of Streptomyces species, the attB site of K. setae is present within an ORF encoding a pirin-homolog, but the K. setae-attB sequence deviates slightly from the consensus sequence of Streptomyces attB sequences.
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Affiliation(s)
- Sun-Uk Choi
- International Center for Biotechnology, Osaka University, 2-1 Yamadaoka, 565-0871 Suita, Osaka, Japan
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Choi SU, Lee CK, Hwang YI, Kinosita H, Nihira T. ?-Butyrolactone autoregulators and receptor proteins in non-Streptomyces actinomycetes producing commercially important secondary metabolites. Arch Microbiol 2003; 180:303-7. [PMID: 14523609 DOI: 10.1007/s00203-003-0591-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2003] [Revised: 07/07/2003] [Accepted: 07/23/2003] [Indexed: 10/26/2022]
Abstract
The presence of gamma-butyrolactone autoregulators and their receptor proteins were investigated in five representative strains of non- Streptomyces actinomycetes producing commercially important secondary metabolites. Ethyl acetate extracts of culture were assayed using wild-type S. virginiae for virginiae butanolide, S. lavendulae FRI-5 for IM-2, and S. griseus HH1 for A-factor. Actinoplanes teichomyceticus and Amycolatopsis mediterranei were shown to produce autoregulators. Corresponding autoregulator-binding activities were found in the crude cell-free lysates of these strains, using the binding assay with tritium-labeled autoregulator analogues as ligands, which suggests that non- Streptomyces actinomycetes might have autoregulator-dependent signaling cascades.
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Affiliation(s)
- Sun-Uk Choi
- International Center for Biotechnology, Osaka University, 2-1 Yamadaoka, Suita, 565-0871, Osaka, Japan
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Lee SC, Oh JH, Hwang YI, Kim JM. Use of Exo-polygalacturonase to Improve Extraction Yields of Alginic Acid from Sea Mustard (Undaria pinnatifida). Prev Nutr Food Sci 2002. [DOI: 10.3746/jfn.2002.7.3.317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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Lee SC, Yuk HG, Lee DH, Lee KE, Hwang YI, Ludescher RD. Stabilization of retinol through incorporation into liposomes. J Biochem Mol Biol 2002; 35:358-63. [PMID: 12296993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
Abstract
Chemical and photochemical processes during storage and preparation rapidly degrade retinol, the most active form of vitamin A. Therefore, the efficacy of incorporation into liposomes in order to modulate the kinetics of retinol degradation was investigated. Retinol was readily incorporated into multilamellar liposomes that were prepared from soybean phosphatidylcholine; the extent of the incorporation was 98.14 +/- 0.93% at pH 9.0 at a ratio of 0.01 : 1 (wt : wt) retinol : phospholipid. It was only marginally lower at higher retinol concentrations. The pH of the hydration buffer had a small effect. The incorporation efficiency ranged from 99.25 +/- 0.47% at pH 3 to 97.45 +/- 1.13% at pH 11. The time course of the retinol degradation in the aqueous solution in liposomes was compared to that of free retinol and free retinol with alpha-tocopherol under a variety of conditions of pH (3, 7, and 11), temperature (4, 25, 37, and 50 degrees ), and light exposure (dark, visible, and UV). The retinol that was incorporated into the liposomes degraded significantly slower than the free retinol or retinol with alpha-tocopherol at pH 7 and 11. At pH 3, where the free retinol degrades rapidly, the degradation kinetics were similar in liposomes and the presence of alpha-tocopherol. At pH 7.0 and 4 degrees in the light, for example, free aqueous retinol was completely degraded within 2 days, while only 20% of the retinol in the liposomes were degraded after 8 days. In general, the protective effect of the liposome incorporation was greater at low temperatures, at neutral and high pH, and in the dark. The results suggest that protection is greater in the solid, gel phase than in the fluid liquid crystalline phase lipids. These results indicate that the incorporation into liposomes can extend the shelf-life of retinol under a variety of conditions of temperature, pH, and ambient light conditions.
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Affiliation(s)
- Seung-Cheol Lee
- Department of Food Science and Biotechnology, Division of Life Sciences, Kyungnam University, Masan 631-701, Korea.
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Hur DY, Kim S, Kim YI, Min HY, Kim DJ, Lee DS, Cho D, Hwang YI, Hwang DH, Park SH, Ahn HK, Chang KY, Kim YB, Lee WJ. CM1, a possible novel activation molecule on human lymphocytes. Immunol Lett 2000; 74:95-102. [PMID: 10996383 DOI: 10.1016/s0165-2478(00)00201-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
CM1 (centrocyte/-blast marker 1) defined by a mAb developed against concanavalin-A activated PBMC, is expressed specifically on some tonsillar germinal center (GC) B cells. In single flow cytometric analysis, the bone marrow did not express these molecules nor did the PBMC or the thymocytes. The peripheral B lymphocytes showed more than 90% positive, while the peripheral T lymphocytes showed approximately 60% positive at 48 h after activation by PMA/ionomycin, respectively. A western blot analysis and an immunoprecipitation for CM1 showed a band at 70 kDa. Cross-linking of CM1 with anti-CM1 mAb induced apoptosis of the GC B cells (CD38(+)IgD(-)). Immunohistochemical staining revealed that the CM1 molecule is distributed over the entire area except the proximal dark zone of the tonsillar germinal centers. These results suggest that the CM1 molecule might be involved in differentiation of the germinal center B cells as one of the novel centrocyte markers.
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Affiliation(s)
- D Y Hur
- Department of Anatomy, Inje University College of Medicine, 614-735, Pusan, South Korea
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Cho D, Kim TG, Lee W, Hwang YI, Cho HI, Han H, Kwon O, Kim D, Park H, Houh D. Interleukin-18 and the costimulatory molecule B7-1 have a synergistic anti-tumor effect on murine melanoma; implication of combined immunotherapy for poorly immunogenic malignancy. J Invest Dermatol 2000; 114:928-34. [PMID: 10771473 DOI: 10.1038/sj.jid.5600685] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Interleukin-18 has been described recently as a cytokine secreted primarily by Kupffer cells. Furthermore, it has been shown that it has significant anti-tumor effects, which are mediated by T cells and natural killer cells, in a manner similar to interleukin-12. Here, we report the evaluation of the effects of the systemic administration of interleukin-18 in combination with B7-1 (CD80) expressed on tumor cells [interleukin-18 + B7-1] on the growth of murine B16 melanoma in vivo. After the subcutaneous inoculation of B16 melanoma, B16 tumors grew progressively in immunocompetent syngeneic C57BL/6 mice. Mice treated with either interleukin-18 or immunized with B7-1-transduced B16 did not demonstrate significant anti-tumor effect. The combination of the two treatments, however, resulted in dramatic suppression of melanoma formation, tumor growth, and a significant improvement in survival. Inhibitory effects of [interleukin-18 + B7-1] on lung metastasis in mice were also detected. Additionally, mice treated with [interleukin-18 + B7-1] showed an increase of natural killer cytotoxicity and interferon-gamma production in vivo. Unlike [interleukin-18 + B7-1], [interleukin-12 + B7-1] did not have a strong anti-tumor effect against B16 melanoma. Histologic characterization after the [interleukin-18 + B7-1] treatment confirmed the infiltration of natural killer cells into the tumor, suggesting that natural killer cells may be involved in the [interleukin-18 + B7-1]-induced anti-tumor effect. This finding was confirmed by showing that depletion of NK1.1+ cells before immunization inhibits the [interleukin-18 + B7-1]-induced anti-tumor effect. Depletion of CD3+ cells in vivo also decreased the anti-tumor effect of [interleukin-18 + B7-1], suggesting the importance of CD3+ T cells. Collectively, combination with interleukin-18 and B7-1 expression has synergistic anti-tumor effects against B16 murine melanoma.
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MESH Headings
- Animals
- Antigens/analysis
- Antigens, Ly
- Antigens, Surface
- B7-1 Antigen/administration & dosage
- CD3 Complex/analysis
- Cytotoxicity, Immunologic/drug effects
- Drug Synergism
- Female
- Interleukin-18/administration & dosage
- Killer Cells, Natural/drug effects
- Killer Cells, Natural/immunology
- Lectins, C-Type
- Melanoma, Experimental/immunology
- Melanoma, Experimental/secondary
- Melanoma, Experimental/therapy
- Mice
- Mice, Inbred C57BL
- NK Cell Lectin-Like Receptor Subfamily B
- Proteins/analysis
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Affiliation(s)
- D Cho
- Department of Dermatology, Department of Microbiology/Immunology, College of Medicine, The Catholic University of Korea
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Abstract
Cranial capacity was measured in Korean adult skulls. The cavity was filled with rice seeds and the volume of the seeds were measured in a graduated cylinder. The results were 1470 +/- 107 (mean +/- standard deviation) in male and 1317 +/- 117 cc in female skulls. These values were in good accordance with those previously reported. In addition, regression formulae were obtained with the product of the length, breadth, and height of the skull as an independent parameter and the measured capacity as a dependent one. With known external measurements, the expected cranial capacity was as follows: when using baso-bregmatic height, male: capacity = 307.5 + 333 x 10(-6) x (length.breadth.baso-bregmatic height) female: capacity = -12.0 + 435 x 10(-6) x (length.breadth.baso-bregmatic height) and, when using auriculo-bregmatic height, male: capacity = 214.6 + 429 x 10(-6) x (length.breadth.auriculo-bregmatic height) female: capacity = 131.6 + 461 x 10(-6) x (length.breadth.auriculo-bregmatic height).
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Affiliation(s)
- Y I Hwang
- Department of Anatomy, Seoul National University, College of Medicine, Korea
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Inoue T, Kyo S, Kiyono T, Ishibashi M, Ishiwatari H, Hwang YI, Yutsudo M, Hakura A. Correlation between tumorigenicity and expression levels or splicing patterns of transcripts of the human papillomavirus type 16 E6 gene. Jpn J Cancer Res 1994; 85:357-63. [PMID: 8200848 PMCID: PMC5919467 DOI: 10.1111/j.1349-7006.1994.tb02367.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
For determination of the correlation between tumorigenicity and the expression levels or splicing patterns of E6 mRNAs of the human papillomavirus type 16 in established cells, a vector containing the intact E6 open reading frame which expresses both unspliced and spliced mRNAs, one expressing only unspliced E6 mRNA, and one expressing both unspliced and spliced mRNAs but producing only truncated E6 proteins were constructed. In transformation assays and analyses of E6 mRNAs, a higher expression level of unspliced E6 mRNA was found to be closely associated with tumorigenicity. Furthermore, it was also related with anchorage-independent growth and a decreased serum requirement of the cells.
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Affiliation(s)
- T Inoue
- Department of Tumor Virology, Osaka University
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