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Lee KS, Kim JJ, Joo SH, Park MS, Yoo JH, Gu G, Lee J. Atomic-scale interpretation of the quantum oscillations in cuprate superconductors. J Phys Condens Matter 2023; 35:21LT01. [PMID: 36898156 DOI: 10.1088/1361-648x/acc379] [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] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 03/10/2023] [Indexed: 06/18/2023]
Abstract
Cuprate superconductors display unusual features in bothkspace and real space as the superconductivity is suppressed-a broken Fermi surface, charge density wave, and pseudogap. Contrarily, recent transport measurements on cuprates under high magnetic fields report quantum oscillations (QOs), which imply rather a usual Fermi liquid behavior. To settle the disagreement, we investigated Bi2Sr2CaCu2O8+δunder a magnetic field in an atomic scale. A particle-hole (p-h) asymmetrically dispersing density of states (DOSs) modulation was found at the vortices on a slightly underdoped sample, while on a highly underdoped sample, no trace of the vortex was found even at 13 T. However, a similar p-h asymmetric DOS modulation persisted in almost an entire field of view. From this observation, we infer an alternative explanation of the QO results by providing a unifying picture where the aforementioned seemingly conflicting evidence from angle-resolved photoemission spectroscopy, spectroscopic imaging scanning tunneling microscopy, and magneto-transport measurements can be understood solely in terms of the DOS modulations.
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Affiliation(s)
- K S Lee
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
| | - J-J Kim
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
| | - S H Joo
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
| | - M S Park
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
| | - J H Yoo
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
| | - Genda Gu
- CMPMS Department, Brookhaven National Laboratory, Upton, New York 11973, United States of America
| | - Jinho Lee
- Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea
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Dabhi N, Mastorakos P, Sokolowski J, Kellogg RT, Park MS. Mechanical Thrombectomy for the Treatment of Anterior Cerebral Artery Occlusion: A Systematic Review of the Literature. AJNR Am J Neuroradiol 2022; 43:1730-1735. [PMID: 36328405 DOI: 10.3174/ajnr.a7690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 09/27/2022] [Indexed: 11/06/2022]
Abstract
BACKGROUND The overall safety and efficacy of mechanical thrombectomy for anterior cerebral artery strokes remain unclear. PURPOSE Our aim was to summarize procedural and clinical outcomes in patients who underwent mechanical thrombectomy for treatment of anterior cerebral artery ischemic stroke. DATA SOURCES A systematic literature review was performed using PubMed, Ovid MEDLINE, and the Web of Science from inception until March 4, 2022. STUDY SELECTION We identified 9 studies with a total of 168 patients with mechanical thrombectomy-treated anterior cerebral artery occlusions. DATA ANALYSIS Recanalization, procedural data, and clinical outcome at last follow-up were collected and summarized. Categoric variables were reported as proportions. The χ2 test of independence or the Kruskal-Wallis test was performed to assess the relationship between selected variables and the anterior cerebral artery embolus type (ie, primary isolated anterior cerebral artery, primary combined anterior cerebral artery, and secondary anterior cerebral artery occlusion) or the mechanical thrombectomy technique. DATA SYNTHESIS For mechanical thrombectomy-treated anterior cerebral artery occlusions, recanalization modified TICI 2b/3 was achieved in 80%, postprocedural complications occurred in 17% of patients, and the 90-day mortality rate was 19%. The rate of symptomatic intracranial hemorrhage varied depending on the anterior cerebral artery embolus type (χ2 = 8.45, P = .01). LIMITATIONS This analysis did not consider factors such as small-study effects that affect reliability and limit interpretation. CONCLUSIONS Mechanical thrombectomy for the treatment of anterior cerebral artery occlusions is safe and efficacious, offering a favorable rate of recanalization and procedural complications. Mechanical thrombectomy-treated anterior cerebral artery occlusions appear to have lower rates of short-term good functional outcomes and an increased risk of symptomatic intracerebral hemorrhage compared with mechanical thrombectomy-treated MCA/ICA occlusions. Single and multicenter studies are needed to further examine the safety and efficacy of mechanical thrombectomy-treated anterior cerebral artery occlusions.
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Affiliation(s)
- N Dabhi
- From the Department of Neurosurgery, University of Virginia Health System, Charlottesville, Virginia
| | - P Mastorakos
- From the Department of Neurosurgery, University of Virginia Health System, Charlottesville, Virginia
| | - J Sokolowski
- From the Department of Neurosurgery, University of Virginia Health System, Charlottesville, Virginia
| | - R T Kellogg
- From the Department of Neurosurgery, University of Virginia Health System, Charlottesville, Virginia
| | - M S Park
- From the Department of Neurosurgery, University of Virginia Health System, Charlottesville, Virginia
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Jeon K, Kim D, Choi JO, Kim KH, Park MS, Jeon ES. Genetic and clinical characteristics of transthyretin cardiac amyloidosis in Koreans. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background/Introduction
Transthyretin amyloidosis with mutations (aTTRv amyloidosis) have over 100 recognized pathogenic mutations of the TTR gene and its clinical manifestations are very heterogenous. Through the global THAOS (Transthyretin Amyloidosis Outcomes Survey) patient registry, different and several types of mutants and clinical differences have been identified. Awareness of aTTRv amyloidosis is now becoming somewhat significant amongst physicians all over the world. This is a detailed look at such efforts in Korea.
Purpose
We aimed to seek the geologic significance of aTTRv amyloidosis in South Korea.
Methods
This was an analysis of 638 Korean amyloidosis patients in a single center over a period of 16 years from 1995 to October 2021. 95 individuals were found with aTTR mutations.
Results
aTTRv amyloidosis constituted 14.8% (n=95) of amyloidosis patients, and the most commonly involved organ being the heart (61.7%, n=58). Unlike the rest of the world, the mixed phenotype was most common (51.0%, n=48) in Korea and the most universal mutation in Koreans were Asp38Ala, which only constitutes about 1.0% in the THAOS registry. Val30Met mutation, which comprises 76% of the mutation in the THAOS registry, was mostly associated the neurologic phenotypes. However, the same mutations in Korea mixed phenotypes with cardiac (38.4%) and neurologic (37%) symptoms.
Conclusion
aTTRv amyloidosis in Korea is different from other patients worldwide. The mixed phenotype was most common, emphasizing the need for heart failure management in the Korean population. Genotype wise, Koreans held a less common mutation of Asp38Ala. The most common mutation of Val30Met was more likely to be associated cardiac symptoms, which concurs with other studies that suggesting that geological features are more important than mutations itself.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- K Jeon
- Samsung Medical Center , Seoul , Korea (Republic of)
| | - D Kim
- Samsung Medical Center , Seoul , Korea (Republic of)
| | - J O Choi
- Samsung Medical Center , Seoul , Korea (Republic of)
| | - K H Kim
- Samsung Medical Center , Seoul , Korea (Republic of)
| | - M S Park
- Samsung Medical Center , Seoul , Korea (Republic of)
| | - E S Jeon
- Samsung Medical Center , Seoul , Korea (Republic of)
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Kim YI, Kim SM, Park SJ, Kim EH, Yu KM, Chang JH, Kim EJ, Casel MAB, Rollon R, Jang SG, Um J, Song MS, Jeong HW, Kim EG, Kim Y, Kim SY, Park JS, Park MS, Kwon GY, Yeo SG, Lee SA, Choi YJ, Jung JU, Choi YK. Critical role of neutralizing antibody for SARS-CoV-2 reinfection and transmission. Emerg Microbes Infect 2021; 10:152-160. [PMID: 33407005 PMCID: PMC7832474 DOI: 10.1080/22221751.2021.1872352] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Revised: 12/07/2020] [Accepted: 12/30/2020] [Indexed: 01/22/2023]
Abstract
Cases of laboratory-confirmed SARS-CoV-2 reinfection have been reported in a number of countries. Further, the level of natural immunity induced by SARS-CoV-2 infection is not fully clear, nor is it clear if a primary infection is protective against reinfection. To investigate the potential association between serum antibody titres and reinfection of SARS-CoV-2, ferrets with different levels of NAb titres after primary SARS-CoV-2 infection were subjected to reinfection with a heterologous SARS-CoV-2 strain. All heterologous SARS-CoV-2 reinfected ferrets showed active virus replication in the upper respiratory and gastro-intestinal tracts. However, the high NAb titre group showed attenuated viral replication and rapid viral clearance. In addition, direct-contact transmission was observed only from reinfected ferrets with low NAb titres (<20), and not from other groups. Further, lung histopathology demonstrated the presence of limited inflammatory regions in the high NAb titre groups compared with control and low NAb groups. This study demonstrates a close correlation between a low NAb titre and SARS-CoV-2 reinfection in a recovered ferret reinfection model.
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Affiliation(s)
- Young-Il Kim
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, Republic of Korea
- Zoonotic Infectious Diseases Research Center, Chungbuk National University, Cheongju, Korea
| | - Se-Mi Kim
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, Republic of Korea
- Zoonotic Infectious Diseases Research Center, Chungbuk National University, Cheongju, Korea
| | - Su-Jin Park
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, Republic of Korea
- Zoonotic Infectious Diseases Research Center, Chungbuk National University, Cheongju, Korea
- Division of Life Science and Research Institute of Life Sciences, Gyeongsang National University, Jinju, Korea
| | - Eun-Ha Kim
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, Republic of Korea
- Zoonotic Infectious Diseases Research Center, Chungbuk National University, Cheongju, Korea
| | - Kwang-Min Yu
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, Republic of Korea
- Zoonotic Infectious Diseases Research Center, Chungbuk National University, Cheongju, Korea
| | - Jae-Hyung Chang
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, Republic of Korea
| | - Eun Ji Kim
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, Republic of Korea
| | - Mark Anthony B. Casel
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, Republic of Korea
- Zoonotic Infectious Diseases Research Center, Chungbuk National University, Cheongju, Korea
| | - Rare Rollon
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, Republic of Korea
| | - Seung-Gyu Jang
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, Republic of Korea
| | - Jihye Um
- Research institute of Public Health, National Medical Center, Seoul, Republic of Korea
| | - Min-Suk Song
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, Republic of Korea
- Zoonotic Infectious Diseases Research Center, Chungbuk National University, Cheongju, Korea
| | - Hye Won Jeong
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, Republic of Korea
| | - Eung-Gook Kim
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, Republic of Korea
| | - Yeonjae Kim
- Research institute of Public Health, National Medical Center, Seoul, Republic of Korea
| | - So Yeon Kim
- Research institute of Public Health, National Medical Center, Seoul, Republic of Korea
| | - Jun-Sun Park
- Research institute of Public Health, National Medical Center, Seoul, Republic of Korea
| | - Mi Sun Park
- Div. of Public Health Research, Sejong Institute of Health & Environment, Sejong City, Republic of Korea
| | - Geun-Yong Kwon
- Sejong Public Health Center, Sejong City, Republic of Korea
| | - Sang Gu Yeo
- Div. of Public Health Research, Sejong Institute of Health & Environment, Sejong City, Republic of Korea
| | - Shin-Ae Lee
- Department of Cancer Biology and Center for Global and Emerging Pathogen Research, Lerner Research Institute, Cleveland, OH, USA
| | - Youn Jung Choi
- Department of Cancer Biology and Center for Global and Emerging Pathogen Research, Lerner Research Institute, Cleveland, OH, USA
| | - Jae U. Jung
- Department of Cancer Biology and Center for Global and Emerging Pathogen Research, Lerner Research Institute, Cleveland, OH, USA
| | - Young Ki Choi
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, Republic of Korea
- Zoonotic Infectious Diseases Research Center, Chungbuk National University, Cheongju, Korea
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Kim BN, Ahn DH, Kang N, Yeo CD, Kim YK, Lee KY, Kim TJ, Lee SH, Park MS, Yim HW, Park JY, Park CK, Kim SJ. TGF-β induced EMT and stemness characteristics are associated with epigenetic regulation in lung cancer. Sci Rep 2020; 10:10597. [PMID: 32606331 PMCID: PMC7326979 DOI: 10.1038/s41598-020-67325-7] [Citation(s) in RCA: 82] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 06/03/2020] [Indexed: 01/01/2023] Open
Abstract
Transforming growth factor-β (TGF-β) promotes tumor invasion and metastasis by inducing epithelial-mesenchymal transition (EMT). EMT is often related with acquisition of stemness characteristics. The objective of this study was to determine whether EMT and stemness characteristics induced by TGF-β might be associated with epigenetic regulation in lung cancer. A human normal lung epithelial cell line and four lung cancer cell lines were treated with TGF-β. Transcriptome analysis of BEAS-2B and A549 cells incubated with TGF-β were analyzed through next-generation sequencing (NGS). Western blotting was carried out to investigate expression levels of epithelial and mesenchymal markers. Wound healing and Matrigel invasion assay, sphere formation assay, and in vivo mice tumor model were performed to evaluate functional characteristics of EMT and stemness acquisition. To investigate whether activation of EMT and stem cell markers might be involved in epigenetic regulation of lung cancer, experiment using a DNA methyltransferase inhibitor (5-azacytidine, AZA), methylation-specific PCR (MSP) and bisulfite sequencing were performed. NGS revealed changes in expression levels of EMT markers (E-cadherin, N-cadherin, fibronectin, vimentin, slug and snail) and stem cell markers (CD44 and CD87) in both BEAS-2B and A549 cells. Functional analysis revealed increased migration, invasion, sphere formation, and tumor development in mice after TGF-β treatment. Expression of slug and CD87 genes was activated following treatment with AZA and TGF-β. MSP and bisulfite sequencing indicated DNA demethylation of slug and CD87 genes. These results suggest that TGF-β induced EMT and cancer stemness acquisition could be associated with activation of slug and CD87 gene by their promoter demethylation.
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Affiliation(s)
- Bit Na Kim
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea.,Postech-Catholic Biomedical Engineering Institute, St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul, 06591, Korea
| | - Dong Hyuck Ahn
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea.,Postech-Catholic Biomedical Engineering Institute, St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul, 06591, Korea
| | - Nahyeon Kang
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea.,Postech-Catholic Biomedical Engineering Institute, St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul, 06591, Korea
| | - Chang Dong Yeo
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea.,Postech-Catholic Biomedical Engineering Institute, St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul, 06591, Korea
| | - Young Kyoon Kim
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Kyo Young Lee
- Department of Hospital Pathology, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Tae-Jung Kim
- Department of Hospital Pathology, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Sug Hyung Lee
- Department of Pathology, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Mi Sun Park
- Department of Biostatistics, Clinical Research Coordinating Center, The Catholic University of Korea, Seoul, Korea
| | - Hyeon Woo Yim
- Department of Biostatistics, Clinical Research Coordinating Center, The Catholic University of Korea, Seoul, Korea
| | - Jong Y Park
- Department of Cancer Epidemiology, Moffitt Cancer Center, Tampa, FL, USA
| | - Chan Kwon Park
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea. .,Postech-Catholic Biomedical Engineering Institute, St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul, 06591, Korea.
| | - Seung Joon Kim
- Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea. .,Postech-Catholic Biomedical Engineering Institute, St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul, 06591, Korea.
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Lee SH, Park JS, Kim SY, Kim DS, Kim YW, Chung MP, Uh ST, Park CS, Park SW, Jeong SH, Park YB, Lee HL, Shin JW, Lee JH, Jegal Y, Lee HK, Kim YH, Song JW, Park MS. Clinical features and prognosis of patients with idiopathic pulmonary fibrosis and chronic obstructive pulmonary disease. Int J Tuberc Lung Dis 2020; 23:678-684. [PMID: 31315699 DOI: 10.5588/ijtld.18.0194] [Citation(s) in RCA: 5] [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: 11/10/2022] Open
Abstract
<sec> <title>BACKGROUND</title> Idiopathic pulmonary fibrosis (IPF) and chronic obstructive pulmonary disease (COPD) share common risk factors. They could therefore be expressed in a single patient. However, the prevalence, clinical characteristics and prognosis of individuals with comorbid IPF and COPD are not known. </sec> <sec> <title>METHOD</title> From 2003 to 2007, the Korean Interstitial Lung Disease Study Group created a register for idiopathic interstitial pneumonia using 2002 ATS/ERS (American Thoracic Society/European Respiratory Society) criteria. Of the 1546 IPF patients assessed, 143 had decreased lung function consistent with COPD (IPF-COPD). COPD was diagnosed based on age (≥40 years) and pulmonary function (forced expiratory volume in 1 sec [FEV1]/forced vital capacity [FVC] ratio < 0.7). </sec> <sec> <title>RESULTS</title> The median age of the IPF-COPD group was 71.0 years (interquartile range 66.0-76.0); most patients were male (88.1%). FVC (%) was significantly higher in the IPF-COPD group; however, FEV1 (%) was significantly lower in the IPF-COPD group (P < 0.001). Diffusing capacity of the lung for carbon monoxide (DLCO) was not significantly different between the two groups. In survival analysis, age and FVC (%), but not COPD, were significantly associated with prognosis (respectively P = 0.003, 0.001 and 0.401). COPD severity was also not related to prognosis (P = 0.935). </sec> <sec> <title>CONCLUSION</title> The prevalence of IPF-COPD was estimated to be ∼9.2% among all IPF patients; prognosis of patients with IPF-COPD was not worse than those with IPF alone. </sec>.
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Affiliation(s)
- S H Lee
- Yonsei University College of Medicine, Seoul, Department of Internal Medicine, National University College of Medicine, Division of Pulmonary and Critical Care Medicine, Seoul National University Bundang Hospital, Seoul
| | - J S Park
- Department of Internal Medicine, National University College of Medicine, Division of Pulmonary and Critical Care Medicine, Seoul National University Bundang Hospital, Seoul
| | - S Y Kim
- Division of Pulmonology, Department of Internal Medicine, Severance Hospital, Institute of Chest Diseases, Yonsei University College of Medicine, Seoul
| | - D S Kim
- Division of Pulmonary and Critical Care Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul
| | - Y W Kim
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine and Lung Institute, Seoul National University College of Medicine, Seoul
| | - M P Chung
- Division of Pulmonary and Critical Care Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul
| | - S T Uh
- Division of Allergy and Respiratory Medicine, Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Seoul
| | - C S Park
- Division of Allergy and Respiratory Medicine, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Gyeonggi-do
| | - S W Park
- Division of Allergy and Respiratory Medicine, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Gyeonggi-do
| | - S H Jeong
- Division of Pulmonology, Department of Internal Medicine, Gachon University Gil Medical Center, Incheon
| | - Y B Park
- Division of Pulmonary, Allergy & Critical Care Medicine, Department of Internal Medicine, Hallym University Kangdong Sacred Heart Hospital, Seoul
| | - H L Lee
- Pulmonary Division, Department of Internal Medicine, Inha University Hospital, Incheon
| | - J W Shin
- Division of Pulmonary Medicine, Department of Internal Medicine, Chung Ang University College of Medicine, Seoul
| | - J H Lee
- Department of Internal Medicine, Ewha Womans University School of Medicine, Ewha Medical Research Institute, Seoul
| | - Y Jegal
- Division of Pulmonary Medicine, Department of Internal Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan
| | - H K Lee
- Division of Critical Care and Pulmonary Medicine, Department of Internal Medicine, Inje University Pusan Paik Hospital, Busan
| | - Y H Kim
- Division of Allergy and Pulmonology, Department of Internal Medicine, Bucheon St Mary's Hospital, The Catholic University of Korea School of Medicine, Seoul, South Korea
| | - J W Song
- Division of Pulmonary and Critical Care Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul
| | - M S Park
- Division of Pulmonology, Department of Internal Medicine, Severance Hospital, Institute of Chest Diseases, Yonsei University College of Medicine, Seoul
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Heo W, Jin N, Park MS, Kim HY, Yoon SM, Lee J, Kim JY. STIM1 knock-down decreases the affinity of obinutuzumab for CD20 by altering CD20 localization to Triton-soluble membrane. Clin Exp Immunol 2020; 200:260-271. [PMID: 32056202 DOI: 10.1111/cei.13427] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/11/2020] [Indexed: 01/16/2023] Open
Abstract
Obinutuzumab is thought to exert its effects through its high antibody-dependent cellular cytotoxicity (ADCC) via glyco-engineering of the Fc region. In addition, obinutuzumab causes direct binding-induced cell death (DCD) only by specifically binding to its target CD20, a Ca2+ channel. However, the specific features of CD20 related to obinutuzumab binding-induction of cell death are not clearly understood. In this study, we evaluated the relationship between the Ca2+ channel features of CD20 as a store-operated Ca2+ channel (SOC) and obinutuzumab binding-induced cell death. Ca2+ channel function and biochemical analysis revealed that CD20 is an Orai1- and stromal interaction molecule (STIM1)-dependent Ca2+ pore. However, binding of obinutuzumab on CD20 did not have any effect on Ca2+ influx activity of CD20; the direct cell death rate mediated by obinutuzumab binding was almost equivalent with or without the extracellular Ca2+ condition. Given the apparent interaction between STIM1 and CD20, we observed Triton-X solubilized obinutuzumab-bound CD20 accompanied by STIM1. Subsequently, obinutuzumab binding and cell death were decreased by STIM1 knock-down in Ramos B cells. Thus, STIM1 directly contributes to cell death by increasing the affinity of cells for obinutuzumab by transferring CD20 to the Triton-soluble membrane region.
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Affiliation(s)
- W Heo
- Department of Pharmacology and Brain, Korea 21 Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - N Jin
- Department of Pharmacology and Brain, Korea 21 Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - M S Park
- Department of Pharmacology and Brain, Korea 21 Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - H-Y Kim
- Department of Pharmacology and Brain, Korea 21 Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
| | - S M Yoon
- College of Pharmacy, Yonsei Institute of Pharmaceutical Sciences, Yonsei University, Incheon, Korea
| | - J Lee
- College of Pharmacy, Yonsei Institute of Pharmaceutical Sciences, Yonsei University, Incheon, Korea
| | - J Y Kim
- Department of Pharmacology and Brain, Korea 21 Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea
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Lee EH, Kim SJ, Ha EJ, Park ES, Choi JY, Leem AY, Kim SY, Park MS, Kim YS, Kang YA. Treatment of latent tuberculous infection among health care workers at a tertiary hospital in Korea. Int J Tuberc Lung Dis 2019; 22:1336-1343. [PMID: 30355414 DOI: 10.5588/ijtld.18.0280] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE To evaluate the acceptance of, adherence to, and outcomes of latent tuberculous infection (LTBI) treatment among health care workers (HCWs). DESIGN This was a retrospective study in a tertiary hospital in Korea. From May to August 2017, 2190 HCWs simultaneously underwent a tuberculin skin test (TST) and interferon-gamma release assay (IGRA). LTBI was diagnosed if the TST induration was 10 mm or IGRA results were positive. RESULTS Of 2190 HCWs tested, 1006 (45.9%) were diagnosed with LTBI. Of these, 655 (65.1%) HCWs visited out-patient clinics, 234 (35.7%) of whom were advised treatment by physicians. Among these, 120 (51.3%) accepted the physicians' recommendations. In general, HCWs who were older, male and smoked were less likely to visit out-patient clinics. Sixty (50%) HCWs received 3 months of isoniazid plus rifampicin (3HR) and 57 (47.5%) HCWs received 4 months of rifampicin (4R). The proportion of HCWs with 2 side effects (3HR 20% vs. 4R 7.0%, P = 0.041) and drug stoppage rate (3HR 20% vs. 4R 5.3%, P = 0.017) were higher in the 3HR group than in the 4R group. Of the 120 HCWs, 78 (65%) completed LTBI treatment. CONCLUSION Overall, the acceptance and completion rate for LTBI treatment was not adequate. For effective LTBI management in HCWs, further programmatic strategies are needed.
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Affiliation(s)
- E H Lee
- Division of Pulmonology, Department of Internal Medicine, Institute of Chest Diseases, Severance Hospital, Yonsei University College of Medicine, Seoul
| | - S J Kim
- Infection Control Office, Severance Hospital, Seoul
| | - E J Ha
- Infection Control Office, Severance Hospital, Seoul
| | - E S Park
- Infection Control Office, Severance Hospital, Seoul
| | - J Y Choi
- Infection Control Office, Severance Hospital, Seoul, Division of Infectious Disease, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - A Y Leem
- Division of Pulmonology, Department of Internal Medicine, Institute of Chest Diseases, Severance Hospital, Yonsei University College of Medicine, Seoul
| | - S Y Kim
- Division of Pulmonology, Department of Internal Medicine, Institute of Chest Diseases, Severance Hospital, Yonsei University College of Medicine, Seoul
| | - M S Park
- Division of Pulmonology, Department of Internal Medicine, Institute of Chest Diseases, Severance Hospital, Yonsei University College of Medicine, Seoul
| | - Y S Kim
- Division of Pulmonology, Department of Internal Medicine, Institute of Chest Diseases, Severance Hospital, Yonsei University College of Medicine, Seoul
| | - Y A Kang
- Division of Pulmonology, Department of Internal Medicine, Institute of Chest Diseases, Severance Hospital, Yonsei University College of Medicine, Seoul
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Min J, Kim JS, Kim HW, Shin AY, Koo HK, Lee SS, Kim YK, Shin KC, Chang JH, Chun G, Lee J, Park MS, Park JS. Clinical profiles of early and tuberculosis-related mortality in South Korea between 2015 and 2017: a cross-sectional study. BMC Infect Dis 2019; 19:735. [PMID: 31438876 PMCID: PMC6704578 DOI: 10.1186/s12879-019-4365-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2019] [Accepted: 08/07/2019] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Although the incidence of tuberculosis (TB) has decreased in South Korea, the mortality rate remains high. TB mortality is a key indicator for TB control interventions. The purpose of this study was to assess early and TB-related mortality during anti-TB treatment and describe the associated clinical characteristics. METHODS A multicenter cross-sectional study was performed across South Korea. Patients with pulmonary TB who died during anti-TB treatment and whose records were submitted to the national TB surveillance system between 2015 and 2017 were enrolled. All TB deaths were categorized based on cause (TB-related or non-TB-related) and timing (early or late). We identified statistical associations using the frequency table, chi-square test, and binary logistic regression. RESULTS Of 5595 notifiable mortality cases, 3735 patients with pulmonary TB were included in the analysis. There were 2541 (68.0%) male patients, and 2935 (78.6%) mortality cases were observed in patients older than 65 years. There were 944 (25.3%) cases of TB-related death and 2545 (68.1%) cases of early death. Of all cases, 187 (5.0%) patients were diagnosed post-mortem and 38 (1.0%) patients died on the first day of treatment. Low body mass index (adjusted odds ratio (aOR) = 1.26; 95% confidence interval (CI) = 1.08-1.48), no reported illness (aOR = 1.36; 95% CI = 1.10-1.68), bilateral disease on chest X-ray (aOR = 1.30; 95% CI = 1.11-1.52), and positive acid-fast bacilli smear result (aOR = 1.30; 95% CI = 1.11-1.52) were significantly associated with early death, as well as TB-related death. Acute respiratory failure was the most common mode of non-TB-related death. Malignancy was associated with both late (aOR = 0.71; 95% CI = 0.59-0.89) and non-TB-related (aOR = 0.35; 95% CI = 0.26-0.46) death. CONCLUSIONS A high proportion of TB death was observed in elderly patients and attributed to non-TB-related causes. Many TB-related deaths occurred during the intensive phase, particularly within the first month. Further studies identifying risk factors for different causes of TB death at different phases of anti-TB treatment are warranted for early targeted intervention in order to reduce TB mortality.
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Affiliation(s)
- Jinsoo Min
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Ju Sang Kim
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Hyung Woo Kim
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Ah Young Shin
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Hyeon-Kyoung Koo
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Ilsan Paik Hospital, Inje University College of Medicine, Goyang, Republic of Korea
| | - Sung-Soon Lee
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Ilsan Paik Hospital, Inje University College of Medicine, Goyang, Republic of Korea
| | - Yang-Ki Kim
- Division of Pulmonary and Allergy Medicine, Department of Internal Medicine, Soonchunhyang University College of Medicine, Seoul, Republic of Korea
| | - Kyeong-Cheol Shin
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Yeungnam University Medical Center, College of Medicine, Yeungnam University, Daegu, Republic of Korea
| | - Jung Hyun Chang
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, College of Medicine, Ewha Womans University, Seoul, Republic of Korea
| | - Gayoung Chun
- Division of TB Epidemic Investigation, Korea Centers for Disease Control and Prevention, Osong, Republic of Korea
| | - Joosun Lee
- Division of TB Epidemic Investigation, Korea Centers for Disease Control and Prevention, Osong, Republic of Korea
| | - Mi Sun Park
- Division of TB Epidemic Investigation, Korea Centers for Disease Control and Prevention, Osong, Republic of Korea
| | - Jae Seuk Park
- Division of Pulmonary Medicine, Department of Internal Medicine, Dankook University College of Medicine, 119 Dandae-ro, Dongnam-gu, Cheonan, 31116, Republic of Korea.
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10
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Jeon SH, Kim HW, Kim BN, Kang N, Yeo CD, Park CK, Kim YK, Lee YH, Kim TJ, Lee KY, Lee SH, Park JY, Park MS, Yim HW, Kim SJ. Comparison of PNA Clamping-assisted Fluorescence Melting Curve Analysis and PNA Clamping in Detecting EGFR Mutations in Matched Tumor Tissue, Cell Block, Pleural Effusion and Blood of Lung Cancer Patients With Malignant Pleural Effusion. In Vivo 2019; 33:595-603. [PMID: 30804147 DOI: 10.21873/invivo.11516] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Revised: 12/30/2018] [Accepted: 12/31/2018] [Indexed: 12/13/2022]
Abstract
BACKGROUND/AIM This study compared the efficacy of PANAMutyper™, a novel technology that integrates PNAClamp™ and PANA S-Melting™, and PNAClamp™ alone for the detection of EGFR mutations in lung cancer patients. MATERIALS AND METHODS PANAMutyper™ and PNAClamp™ were used to assess the EGFR mutation status in tissue, cell block, pleural effusion, and blood samples of 90 lung cancer patients with malignant pleural effusion. RESULTS PANAMutyper™ detected more EGFR mutations than PNAClamp™, especially in body fluids (pleural effusion and serum). Patients with additional EGFR mutations detected using PANAMutyper™ had a favorable response to EGFR-tyrosine kinase inhibitor (TKI) treatment. CONCLUSION The diagnostic performance of PANAMutyper™ was superior to that of PNAClamp™ for the detection of EGFR mutations. It was also better at identifying lung cancer patients with malignant pleural effusion who were likely to benefit from EGFR-TKI treatment.
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Affiliation(s)
- Sang Hoon Jeon
- Division of Pulmonology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Hyung Woo Kim
- Division of Pulmonology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Bit Na Kim
- Division of Pulmonology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.,The Cancer Research Institute, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Nahyeon Kang
- Division of Pulmonology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.,The Cancer Research Institute, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Chang Dong Yeo
- Division of Pulmonology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.,The Cancer Research Institute, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Chan Kwon Park
- Division of Pulmonology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.,The Cancer Research Institute, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Young Kyoon Kim
- Division of Pulmonology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Yoon Ho Lee
- Department of Hospital Pathology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Tae-Jung Kim
- Department of Hospital Pathology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Kyo Young Lee
- Department of Hospital Pathology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Sug Hyung Lee
- Department of Pathology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Jong Y Park
- Department of Cancer Epidemiology, Moffitt Cancer Center, Tampa, FL, U.S.A
| | - Mi Sun Park
- Department of Biostatistics, Clinical Research Coordinating Center, The Catholic University of Korea, Seoul, Republic of Korea
| | - Hyeon Woo Yim
- Department of Biostatistics, Clinical Research Coordinating Center, The Catholic University of Korea, Seoul, Republic of Korea
| | - Seung Joon Kim
- Division of Pulmonology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea .,The Cancer Research Institute, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
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11
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Choi SY, Kim HW, Jeon SH, Kim BN, Kang N, Yeo CD, Park CK, Kim YK, Lee YH, Lee KY, Lee SH, Park JY, Park MS, Yim HW, Kim SJ. Comparison of PANAMutyper and PNAClamp for Detecting KRAS Mutations from Patients With Malignant Pleural Effusion. In Vivo 2019; 33:945-954. [PMID: 31028221 PMCID: PMC6559923 DOI: 10.21873/invivo.11563] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 02/27/2019] [Accepted: 03/08/2019] [Indexed: 12/15/2022]
Abstract
BACKGROUND/AIM KRAS is one of the frequently mutated genes in human cancers and often relates with drug resistance and poor prognosis. PANAMutyper™ is a novel technology that integrates PNAClamp™ and PANA S-Melting™. In the present study, PANAMutyper™ and PNAClamp™ were compared for the detection of KRAS mutations using different samples of patients with malignant pleural effusion. PATIENTS AND METHODS A total of 103 patients (including 56 lung adenocarcinoma, 10 lung squamous carcinoma, 17 small cell lung cancer, 3 large cell lung cancer, 3 stomach cancer, 2 ovarian cancer, and others) with malignant pleural effusion were investigated using matched tumor tissue, cell block, and pleural effusion samples. The diagnostic performance of these two methods was compared. RESULTS KRAS mutations were detected in 18 (17.5%) of 103 patients using tissue, cell block, and pleural effusion samples. All 18 patients with KRAS mutations were detected by PANAMutyper™ using any sample type, however, only 7 cases were detected by PNAClamp™. Among the subtypes of KRAS mutations, substitution in codon 12, 35G>T was the most frequent, followed by substitution in codon 12, 35G>A and codon 12, 34G>A. In pleural effusion specimens, PANAMutyper™ showed a better diagnostic performance compared to PNAClamp™. CONCLUSION PANAMutyper™ had a diagnostic superiority for the detection of KRAS mutations in patients with malignant pleural effusion compared to PNAClamp™, although there was a concordance between PANAMutyper™ and PNAClamp™ results. Therefore, PANAMutyper™ can be used for a more sensitive and accurate detection of KRAS mutations.
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Affiliation(s)
- Su Yeon Choi
- Division of Pulmonology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
- The Cancer Research Institute, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Hyung Woo Kim
- Division of Pulmonology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Sang Hoon Jeon
- Division of Pulmonology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Bit Na Kim
- Division of Pulmonology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
- The Cancer Research Institute, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Nahyeon Kang
- Division of Pulmonology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
- The Cancer Research Institute, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Chang Dong Yeo
- Division of Pulmonology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
- The Cancer Research Institute, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Chan Kwon Park
- Division of Pulmonology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
- The Cancer Research Institute, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Young Kyoon Kim
- Division of Pulmonology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Yoon Ho Lee
- Department of Hospital Pathology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Kyo Young Lee
- Department of Hospital Pathology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Sug Hyung Lee
- Department of Pathology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Jong Y Park
- Department of Cancer Epidemiology, Moffitt Cancer Center, Tampa, FL, U.S.A
| | - Mi Sun Park
- Department of Biostatistics, Clinical Research Coordinating Center, The Catholic University of Korea, Seoul, Republic of Korea
| | - Hyeon Woo Yim
- Department of Biostatistics, Clinical Research Coordinating Center, The Catholic University of Korea, Seoul, Republic of Korea
| | - Seung Joon Kim
- Division of Pulmonology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
- The Cancer Research Institute, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
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12
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Joo SH, Kim JJ, Yoo JH, Park MS, Lee KS, Gu G, Lee J. Cooper Pair Density of Bi 2Sr 2CaCu 2O 8+ x in Atomic scale at 4.2 K. Nano Lett 2019; 19:1112-1117. [PMID: 30698977 DOI: 10.1021/acs.nanolett.8b04415] [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] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In pursuit of the elusive mechanism of high- T C superconductors (HTSC), spectroscopic imaging scanning tunneling microscopy (SI-STM) is an indispensable tool for surveying local properties of HTSC. Since a conventional STM utilizes metal tips, which allow the examination of only quasiparticles and not superconducting (SC) pairs, Josephson tunneling using STM has been demonstrated by many authors in the past. An atomically resolved scanning Josephson tunneling microscopy (SJTM), however, was realized only recently on Bi2Sr2CaCu2O8+ x (Bi-2212) below 50 mK and on the Pb(110) surface at 20 mK. Here we report the atomically resolved SJTM on Bi2Sr2CaCu2O8+ x at 4.2 K using Bi-2212 tips created in situ. The I- V characteristics show clear zero bias conductance peaks following Ambegaokar-Baratoff (AB) theory. A gap map was produced for the first time using an atomically resolved Josephson critical current map I C( r) and AB theory. Surprisingly, we found that this new gap map is anticorrelated to the gap map produced by a conventional method relying on the coherence peaks. Quasiparticle resonance due to a single isolated zinc atom impurity was also observed by SJTM, indicating that atomically resolved SJTM was achieved at 4.2 K. Our result provides a starting point for realizing SJTM at even higher temperatures, rendering possible investigation of the existence of SC pairs in HTSC above the T C.
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Affiliation(s)
- S H Joo
- Department of Physics and Astronomy , Seoul National University (SNU) , Seoul 08826 , Republic of Korea
- Center for Correlated Electron Systems , Institute for Basic Science (IBS) , Seoul 08826 , Republic of Korea
| | - J-J Kim
- Department of Physics and Astronomy , Seoul National University (SNU) , Seoul 08826 , Republic of Korea
- Center for Correlated Electron Systems , Institute for Basic Science (IBS) , Seoul 08826 , Republic of Korea
| | - J H Yoo
- Department of Physics and Astronomy , Seoul National University (SNU) , Seoul 08826 , Republic of Korea
- Center for Correlated Electron Systems , Institute for Basic Science (IBS) , Seoul 08826 , Republic of Korea
| | - M S Park
- Department of Physics and Astronomy , Seoul National University (SNU) , Seoul 08826 , Republic of Korea
- Center for Correlated Electron Systems , Institute for Basic Science (IBS) , Seoul 08826 , Republic of Korea
| | - K S Lee
- Department of Physics and Astronomy , Seoul National University (SNU) , Seoul 08826 , Republic of Korea
- Center for Correlated Electron Systems , Institute for Basic Science (IBS) , Seoul 08826 , Republic of Korea
| | - G Gu
- CMPMS Department , Brookhaven National Laboratory , Upton , New York 11973 , United States
| | - Jinho Lee
- Department of Physics and Astronomy , Seoul National University (SNU) , Seoul 08826 , Republic of Korea
- Center for Correlated Electron Systems , Institute for Basic Science (IBS) , Seoul 08826 , Republic of Korea
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13
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Kang N, Choi SY, Kim BN, Yeo CD, Park CK, Kim YK, Kim TJ, Lee SB, Lee SH, Park JY, Park MS, Yim HW, Kim SJ. Hypoxia-induced cancer stemness acquisition is associated with CXCR4 activation by its aberrant promoter demethylation. BMC Cancer 2019; 19:148. [PMID: 30760238 PMCID: PMC6375212 DOI: 10.1186/s12885-019-5360-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 02/07/2019] [Indexed: 01/17/2023] Open
Abstract
Background A hypoxic microenvironment leads to an increase in the invasiveness and the metastatic potential of cancer cells within tumors via the epithelial-mesenchymal transition (EMT) and cancer stemness acquisition. However, hypoxia-induced changes in the expression and function of candidate stem cell markers and their possible molecular mechanism is still not understood. Methods Lung cell lines were analyzed in normoxic or hypoxic conditions. For screening among the stem cell markers, a transcriptome analysis using next-generation sequencing was performed. For validation, the EMT and stem cell characteristics were analyzed. To determine whether an epigenetic mechanism was involved, the cell lines were treated with a DNA methyltransferase inhibitor (AZA), and methylation-specific PCR and bisulfite sequencing were performed. Results Next-generation sequencing revealed that the CXCR4 expression was significantly higher after the hypoxic condition, which functionally resulted in the EMT and cancer stemness acquisition. The acquisition of the EMT and stemness properties was inhibited by treatment with CXCR4 siRNA. The CXCR4 was activated by either the hypoxic condition or treatment with AZA. The methylation-specific PCR and bisulfite sequencing displayed a decreased CXCR4 promoter methylation in the hypoxic condition. Conclusions These results suggest that hypoxia-induced acquisition of cancer stem cell characteristics was associated with CXCR4 activation by its aberrant promoter demethylation.
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Affiliation(s)
- Nahyeon Kang
- Division of Pulmonology, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul, 06591, Republic of Korea.,The Cancer Research Institute, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul, 06591, Republic of Korea
| | - Su Yeon Choi
- Division of Pulmonology, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul, 06591, Republic of Korea.,The Cancer Research Institute, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul, 06591, Republic of Korea
| | - Bit Na Kim
- Division of Pulmonology, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul, 06591, Republic of Korea.,The Cancer Research Institute, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul, 06591, Republic of Korea
| | - Chang Dong Yeo
- Division of Pulmonology, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul, 06591, Republic of Korea.,The Cancer Research Institute, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul, 06591, Republic of Korea
| | - Chan Kwon Park
- Division of Pulmonology, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul, 06591, Republic of Korea.,The Cancer Research Institute, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul, 06591, Republic of Korea
| | - Young Kyoon Kim
- Division of Pulmonology, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul, 06591, Republic of Korea
| | - Tae-Jung Kim
- Department of Hospital Pathology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Seong-Beom Lee
- Department of Pathology, Institute of Hansen's Disease, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Sug Hyung Lee
- Department of Pathology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Jong Y Park
- Department of Cancer Epidemiology, Moffitt Cancer Center, Tampa, FL, USA
| | - Mi Sun Park
- Department of Biostatistics, Clinical Research Coordinating Center, The Catholic University of Korea, Seoul, Republic of Korea
| | - Hyeon Woo Yim
- Department of Biostatistics, Clinical Research Coordinating Center, The Catholic University of Korea, Seoul, Republic of Korea
| | - Seung Joon Kim
- Division of Pulmonology, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul, 06591, Republic of Korea. .,The Cancer Research Institute, College of Medicine, The Catholic University of Korea, 222, Banpo-daero, Seocho-gu, Seoul, 06591, Republic of Korea.
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14
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Lee KH, Han SH, Yong D, Paik HC, Lee JG, Kim MS, Joo DJ, Choi JS, Kim SI, Kim YS, Park MS, Kim SY, Yoon YN, Kang S, Jeong SJ, Choi JY, Song YG, Kim JM. Acquisition of Carbapenemase-Producing Enterobacteriaceae in Solid Organ Transplantation Recipients. Transplant Proc 2019; 50:3748-3755. [PMID: 30577266 DOI: 10.1016/j.transproceed.2018.01.058] [Citation(s) in RCA: 8] [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: 11/14/2017] [Accepted: 01/23/2018] [Indexed: 02/07/2023]
Abstract
BACKGROUND Carbapenemase-producing Enterobacteriaceae (CPE) can lead to life-threatening outcomes with rapid spread of the carbapenemase gene in solid organ transplantation (SOT) recipients because of limitations of available antibiotics. We examined the characteristics and importance of CPE acquisition in SOT recipients with large numbers of CPE isolates. METHODS Between November 2015 and October 2016, 584 CPE isolates were found in 37 recipients and verified by carbapenemase gene multiplex polymerase chain reaction (PCR). One hundred recipients with at least 2 negative results in carbapenemase PCR for stool surveillance and no CPE isolates in clinical samples were retrospectively included. RESULTS Most CPE isolates were Klebsiella pneumoniae carbapenemase (KPC)-producing K. pneumoniae (546, 93.5%). The most frequent transplantation organ was lung (43.3%), and the most common sample with CPE isolates other than stool was respiratory tract (22.6%). The median time between SOT and first CPE acquisition was 7 days. All-cause mortality was significantly higher in recipients with CPE than in those without CPE (24.3% vs 10.0%; P = .03). In multivariate regression analysis, stool colonization of vancomycin-resistant Enterococci and/or Clostridium difficile during 30 days before SOT (odds ratio [OR], 3.28; 95% CI, 1.24-8.68; P = .02), lung transplantation (OR, 4.50; 95% CI, 1.19-17.03; P = .03), and intensive care unit stay ≥2 weeks (OR, 6.21; 95% CI, 1.72-22.45; P = .005) were associated with acquisition of CPE. CONCLUSIONS Early posttransplantation CPE acquisition may affect the clinical outcome of SOT recipients. Careful screening for CPE during the early posttransplantation period would be meaningful in recipients with risk factors.
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Affiliation(s)
- K H Lee
- Division of Infectious Disease, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - S H Han
- Division of Infectious Disease, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea.
| | - D Yong
- Department of Laboratory Medicine and Research Institute of Bacterial Resistance, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - H C Paik
- Department of Thoracic and Cardiovascular Surgery, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - J G Lee
- Department of Thoracic and Cardiovascular Surgery, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - M S Kim
- Department of Transplantation Surgery and Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - D J Joo
- Department of Transplantation Surgery and Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - J S Choi
- Department of Transplantation Surgery and Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - S I Kim
- Department of Transplantation Surgery and Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Y S Kim
- Department of Transplantation Surgery and Research Institute for Transplantation, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - M S Park
- Division of Pulmonology and Critical Care Medicine, Department of Internal Medicine, Institute of Chest Diseases, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - S Y Kim
- Division of Pulmonology and Critical Care Medicine, Department of Internal Medicine, Institute of Chest Diseases, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Y N Yoon
- Department of Cardiothoracic Surgery, Cardiovascular Center, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - S Kang
- Division of Cardiology, Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - S J Jeong
- Division of Infectious Disease, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - J Y Choi
- Division of Infectious Disease, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Y G Song
- Division of Infectious Disease, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - J M Kim
- Division of Infectious Disease, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
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15
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Shim KM, Kim YS, Jung MP, Kim JW, Park MS, Hong SH, Kang KK. Recent Changes in the Frequency of Occurrence of Extreme Weather Events in South Korea. ACTA ACUST UNITED AC 2018. [DOI: 10.15531/ksccr.2018.9.4.461] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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16
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Lee J, Kim YK, Seo YY, Choi EK, Lee DS, Kim YS, Hong SH, Kang JH, Lee KY, Park JK, Sung SW, Kim HB, Park MS, Yim HW, Kim SJ. Clinical Characteristics of False-Positive Lymph Node on Chest CT or PET-CT Confirmed by Endobronchial Ultrasound-Guided Transbronchial Needle Aspiration in Lung Cancer. Tuberc Respir Dis (Seoul) 2018; 81:339-346. [PMID: 29926557 PMCID: PMC6148105 DOI: 10.4046/trd.2017.0121] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Revised: 02/20/2018] [Accepted: 02/28/2018] [Indexed: 12/25/2022] Open
Abstract
Background Endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) is a standard procedure to evaluate suspicious lymph node involvement of lung cancer because computed tomography (CT) and 18F-fluorodeoxyglucose positron emission tomography-CT (PET-CT) have limitations in their sensitivity and specificity. There are a number of benign causes of false positive lymph node such as anthracosis or anthracofibrosis, pneumoconiosis, old or active tuberculosis, interstitial lung disease, and other infectious conditions including pneumonia. The purpose of this study was to evaluate possible causes of false positive lymph node detected in chest CT or PET-CT. Methods Two hundred forty-seven patients who were initially diagnosed with lung cancer between May 2009 and December 2012, and underwent EBUS-TBNA to confirm suspicious lymph node involvement by chest CT or PET-CT were analyzed for the study. Results Of 247 cases, EBUS-TBNA confirmed malignancy in at least one lymph node in 189. The remaining 58 patients whose EBUS-TBNA results were negative were analyzed. Age ≥65, squamous cell carcinoma as the histologic type, and pneumoconiosis were related with false-positive lymph node involvement on imaging studies such as chest CT and PET-CT. Conclusion These findings suggest that lung cancer staging should be done more carefully when a patient has clinically benign lymph node characteristics including older age, squamous cell carcinoma, and benign lung conditions.
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Affiliation(s)
- Jongmin Lee
- Division of Pulmonary, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Young Kyoon Kim
- Division of Pulmonary, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Ye Young Seo
- Department of Nuclear Medicine, Inje University Sanggye Paik Hospital, Seoul, Korea
| | - Eun Kyoung Choi
- Department of Radiology, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Dong Soo Lee
- Department of Radiation Oncology, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Yeon Sil Kim
- Department of Radiation Oncology, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Sook Hee Hong
- Division of Medical Oncology, College of Medicine, The Catholic University of Korea, Seoul, Korea.,The Cancer Research Institute, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Jin Hyoung Kang
- Division of Medical Oncology, College of Medicine, The Catholic University of Korea, Seoul, Korea.,The Cancer Research Institute, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Kyo Young Lee
- Department of Hospital Pathology, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Jae Kil Park
- Department of Thoracic Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Sook Whan Sung
- Department of Thoracic Surgery, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Hyun Bin Kim
- Department of Biostatistics, College of Medicine, The Catholic University of Korea, Seoul, Korea.,Clinical Research Coordinating Center, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Mi Sun Park
- Department of Biostatistics, College of Medicine, The Catholic University of Korea, Seoul, Korea.,Clinical Research Coordinating Center, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Hyeon Woo Yim
- Department of Biostatistics, College of Medicine, The Catholic University of Korea, Seoul, Korea.,Clinical Research Coordinating Center, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Seung Joon Kim
- Division of Pulmonary, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.,The Cancer Research Institute, College of Medicine, The Catholic University of Korea, Seoul, Korea.
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Kim TK, Yoon JR, Noh Y, Yoon HJ, Park MS, Kim YH. Preliminary study of anesthetic risk factors in surgery for pathologic fractures secondary to metastatic tumors. Anesth Pain Med (Seoul) 2018. [DOI: 10.17085/apm.2018.13.2.222] [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: 11/17/2022] Open
Affiliation(s)
- Tae Kwane Kim
- Department of Anesthesiology and Pain Medicine, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Jun Rho Yoon
- Department of Anesthesiology and Pain Medicine, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Youngmyung Noh
- Department of Anesthesiology and Pain Medicine, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Hye Jin Yoon
- Department of Anesthesiology and Pain Medicine, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Mi Sun Park
- Department of Anesthesiology and Pain Medicine, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Young-hye Kim
- Department of Anesthesiology and Pain Medicine, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Zielinski MD, Stubbs JR, Polites SF, Xue A, Haugen DAL, Emery R, Jenkins DH, Park MS. In vitro Analysis of the Hemostatic Properties of Whole Blood Products Prepared with a Platelet-Sparing Leukoreduction Filter. J Thromb Circ Open Access 2018; 4:124. [PMID: 36937038 PMCID: PMC10022254 DOI: 10.4172/2572-9462.1000124] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Background Warm fresh whole blood (WFWB) is an ideal resuscitation fluid for exsanguinating patients but there are myriad logistic and infectious issues associated with its use. Cold whole blood (CWB) may be an acceptable alternative to the reconstituted whole blood (RWB), the current standard of care. A leukoreduction filter has been developed which maintains platelet count while eliminating white blood cells but its effect on platelet function is unknown. We hypothesize that CWB will retain an acceptable functional coagulation profile after filtration and over time. Study Design and Methods WFWB and CWB samples were obtained from eight donors and four units of RWB were created. The quantitative and qualitative in vitro coagulation profiles of WFWB, RWB, and CWB over time were compared. Results Filtration was successful at removing white blood cells (5.5 ± 1.2 vs. 0.3 ± 0.3 × 106/L) while retaining an adequate platelet count (172.0 ± 47.0 to 166.0 ± 42.3 × 109/L) and hemoglobin concentration (13.7 ± 0.5 vs. 13.0 ± 0.7 g/dL). Rotational Thromboelastography (ROTEM) results revealed a similar clotting time (CT) before and after filtration (64.9 ± 5.1 vs. 64.1 ± 6.8 s) but a decreased maximum clot firmness (MCF) (58.6 ± 4.2 vs. 54.9 ± 4.6 mm). Platelet aggregation decreased substantially (28.8 ± 6.7 vs. 9.3 ± 2.1 ohm) immediately after filtration. CWB function continued to diminish over time. Conclusion CWB holds great promise as a surrogate for WFWB, but use of a platelet-sparing LR filter diminishes platelet function almost immediately after filtration.
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Affiliation(s)
- MD Zielinski
- Division of Trauma, Critical Care and General Surgery, St. Mary’s Hospital, Mayo Clinic, USA
- Corresponding author: Prof. Martin D. Zielinski, Division of Trauma, Critical Care and General Surgery, Mary Brigh 2-810, St. Mary’s Hospital, Mayo Clinic, 1216 Second St. SW, Rochester, MN 55902, USA, Tel: +507-255-2923;
| | - JR Stubbs
- Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota, USA
| | - SF Polites
- Division of Trauma, Critical Care and General Surgery, St. Mary’s Hospital, Mayo Clinic, USA
| | - A Xue
- Department of Hematology, Mayo Clinic, Rochester, Minnesota, USA
| | - DAL Haugen
- Department of Anesthesiology, Mayo Clinic, Rochester, Minnesota, USA
| | - R Emery
- Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota, USA
| | - DH Jenkins
- Division of Trauma, Emergency Surgery, University of Texas Health Science Center, San Antonio, Texas, USA
| | - MS Park
- Division of Trauma, Critical Care and General Surgery, St. Mary’s Hospital, Mayo Clinic, USA
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Abstract
Background Breast cancer is a heterogeneous disease. Recent studies showed that apparent diffusion coefficient (ADC) values have various association with tumor aggressiveness and prognosis. Purpose To evaluate the value of histogram analysis of ADC values obtained from the whole tumor volume in invasive ductal cancer (IDC) and ductal carcinoma in situ (DCIS). Material and Methods This retrospective study included 201 patients with confirmed DCIS (n = 37) and IDC (n = 164). The IDC group was divided into two groups based on the presence of a DCIS component: IDC-DCIS (n = 76) and pure IDC (n = 88). All patients underwent preoperative breast magnetic resonance imaging (MRI) with diffusion-weighted images at 3.0 T. Histogram parameters of cumulative ADC values, skewness, and kurtosis were calculated and statistically analyzed. Results The differences between DCIS, IDC-DCIS, and pure IDC were significant in all percentiles of ADC values, in descending order of DCIS, IDC-DCIS, and pure IDC. IDC showed significantly lower ADC values than DCIS, and ADC50 was the best indicator for discriminating IDC from DCIS, with a threshold of 1.185 × 10-3 mm2/s (sensitivity of 82.9%, specificity of 75.7%). However, multivariate analysis of obtained ADC values showed no significant differences between DCIS, IDC-DCIS, and pure IDC ( P > 0.05). Conclusion Volume-based ADC values showed association with heterogeneity of breast cancer. However, there was no additional diagnostic performance in histogram analysis for differentiating between DCIS, IDC-DCIS, and pure IDC.
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Affiliation(s)
- Ga Eun Park
- 1 Department of Radiology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Sung Hun Kim
- 1 Department of Radiology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Eun Jeong Kim
- 1 Department of Radiology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Bong Joo Kang
- 1 Department of Radiology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Mi Sun Park
- 2 Department of Biostatistics, Clinical Research Coordinating Center, The Catholic University of Korea, Seoul, Republic of Korea
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Lee YY, Yoon W, Kim SK, Baek BH, Kim GS, Kim JT, Park MS. Acute Basilar Artery Occlusion: Differences in Characteristics and Outcomes after Endovascular Therapy between Patients with and without Underlying Severe Atherosclerotic Stenosis. AJNR Am J Neuroradiol 2017; 38:1600-1604. [PMID: 28546252 DOI: 10.3174/ajnr.a5233] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Accepted: 03/24/2017] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Prediction of underlying intracranial atherosclerotic stenosis before endovascular therapy might be helpful for appropriate therapeutic planning in patients with acute ischemic stroke. This study aimed to compare the characteristics and treatment outcomes in patients with acute basilar artery occlusion relative to the existence or nonexistence of underlying intracranial atherosclerotic stenosis. MATERIALS AND METHODS Sixty-two patients with acute basilar artery occlusion underwent multimodal endovascular therapy. All patients underwent stent-retriever thrombectomy as a first-line endovascular therapy. Patients with underlying intracranial atherosclerotic stenosis underwent additional intracranial angioplasty and stent placement. The clinical and imaging characteristics and treatment outcomes were retrospectively analyzed and compared between patients with and without intracranial atherosclerotic stenosis. RESULTS Underlying intracranial atherosclerotic stenosis was identified at the occlusion site in 15 patients (24.1%). Occlusion in the proximal segment of the basilar artery was more common in patients with intracranial atherosclerotic stenosis (60% versus 6.4%, P < .001), whereas occlusion in the distal segment was more common in those without it (91.5% versus 26.7%, P < .001). Bilateral thalamic infarction on a pretreatment DWI was less common in patients with intracranial atherosclerotic stenosis (0% versus 27.7%, P = .027) compared with those without it. There were no significant differences in the rates of successful revascularization, favorable outcome, symptomatic hemorrhage, and mortality between the 2 groups. CONCLUSIONS Underlying intracranial atherosclerotic stenosis was not uncommon in patients with acute basilar artery occlusion. The occlusion segment of the basilar artery and the presence or absence of bilateral thalamic infarction on a pretreatment DWI might be helpful for predicting underlying intracranial atherosclerotic stenosis in patients with acute basilar artery occlusion. Patients with and without underlying intracranial atherosclerotic stenosis who underwent endovascular therapy had similar outcomes.
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Affiliation(s)
- Y Y Lee
- From the Departments of Radiology (Y.Y.L., W.Y., S.K.K., B.H.B., G.S.K.)
| | - W Yoon
- From the Departments of Radiology (Y.Y.L., W.Y., S.K.K., B.H.B., G.S.K.)
| | - S K Kim
- From the Departments of Radiology (Y.Y.L., W.Y., S.K.K., B.H.B., G.S.K.)
| | - B H Baek
- From the Departments of Radiology (Y.Y.L., W.Y., S.K.K., B.H.B., G.S.K.)
| | - G S Kim
- From the Departments of Radiology (Y.Y.L., W.Y., S.K.K., B.H.B., G.S.K.)
| | - J T Kim
- Neurology (J.T.K., M.S.P.), Chonnam National University Medical School, Chonnam National University Hospital, Gwangju, Republic of Korea
| | - M S Park
- Neurology (J.T.K., M.S.P.), Chonnam National University Medical School, Chonnam National University Hospital, Gwangju, Republic of Korea
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Kim J, Hwang JY, Oh JK, Park MS, Kim SW, Chang H, Kim TH. The association between whole body sagittal balance and risk of falls among elderly patients seeking treatment for back pain. Bone Joint Res 2017; 6:337-344. [PMID: 28536117 PMCID: PMC5457638 DOI: 10.1302/2046-3758.65.bjr-2016-0271.r2] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Accepted: 03/23/2017] [Indexed: 12/02/2022] Open
Abstract
Objectives The objective of this study was to assess the association between whole body sagittal balance and risk of falls in elderly patients who have sought treatment for back pain. Balanced spinal sagittal alignment is known to be important for the prevention of falls. However, spinal sagittal imbalance can be markedly compensated by the lower extremities, and whole body sagittal balance including the lower extremities should be assessed to evaluate actual imbalances related to falls. Methods Patients over 70 years old who visited an outpatient clinic for back pain treatment and underwent a standing whole-body radiograph were enrolled. Falls were prospectively assessed for 12 months using a monthly fall diary, and patients were divided into fallers and non-fallers according to the history of falls. Radiological parameters from whole-body radiographs and clinical data were compared between the two groups. Results A total of 144 patients (120 female patients and 24 male patients) completed a 12-month follow-up for assessing falls. A total of 31 patients (21.5%) reported at least one fall within the 12-month follow-up. In univariate logistic regression analysis, the risk of falls was significantly increased in older patients and those with more medical comorbidities, decreased lumbar lordosis, increased sagittal vertical axis, and increased horizontal distance between the C7 plumb line and the centre of the ankle (C7A). Increased C7A was significantly associated with increased risk of falls even after multivariate adjustment. Conclusion Whole body sagittal balance, measured by the horizontal distance between the C7 plumb line and the centre of the ankle, was significantly associated with risk of falls among elderly patients with back pain. Cite this article: J. Kim, J. Y. Hwang, J. K. Oh, M. S. Park, S. W. Kim, H. Chang, T-H. Kim. The association between whole body sagittal balance and risk of falls among elderly patients seeking treatment for back pain. Bone Joint Res 2017;6:–344. DOI: 10.1302/2046-3758.65.BJR-2016-0271.R2.
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Affiliation(s)
- J Kim
- Department of Pediatrics, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea
| | - J Y Hwang
- Spine Centre, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - J K Oh
- Spine Centre, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - M S Park
- Spine Centre, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - S W Kim
- Spine Centre, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - H Chang
- Spine Centre, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
| | - T-H Kim
- Spine Centre, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Korea
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Kim JJ, Joo SH, Lee KS, Yoo JH, Park MS, Kwak JS, Lee J. Improved design for a low temperature scanning tunneling microscope with an in situ tip treatment stage. Rev Sci Instrum 2017; 88:043702. [PMID: 28456260 DOI: 10.1063/1.4979928] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The Low Temperature Scanning Tunneling Microscope (LT-STM) is an extremely valuable tool not only in surface science but also in condensed matter physics. For years, numerous new ideas have been adopted to perfect LT-STM performances-Ultra-Low Vibration (ULV) laboratory and the rigid STM head design are among them. Here, we present three improvements for the design of the ULV laboratory and the LT-STM: tip treatment stage, sample cleaving stage, and vibration isolation system. The improved tip treatment stage enables us to perform field emission for the purpose of tip treatment in situ without exchanging samples, while our enhanced sample cleaving stage allows us to cleave samples at low temperature in a vacuum without optical access by a simple pressing motion. Our newly designed vibration isolation system provides efficient space usage while maintaining vibration isolation capability. These improvements enhance the quality of spectroscopic imaging experiments that can last for many days and provide increased data yield, which we expect can be indispensable elements in future LT-STM designs.
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Affiliation(s)
- J-J Kim
- Department of Physics and Astronomy, Institute of Applied Physics, Seoul National University, Seoul 08826, South Korea and Center for Correlated Electron Systems, Institute for Basic Science(IBS), Seoul 08826, South Korea
| | - S H Joo
- Department of Physics and Astronomy, Institute of Applied Physics, Seoul National University, Seoul 08826, South Korea and Center for Correlated Electron Systems, Institute for Basic Science(IBS), Seoul 08826, South Korea
| | - K S Lee
- Department of Physics and Astronomy, Institute of Applied Physics, Seoul National University, Seoul 08826, South Korea and Center for Correlated Electron Systems, Institute for Basic Science(IBS), Seoul 08826, South Korea
| | - J H Yoo
- Department of Physics and Astronomy, Institute of Applied Physics, Seoul National University, Seoul 08826, South Korea and Center for Correlated Electron Systems, Institute for Basic Science(IBS), Seoul 08826, South Korea
| | - M S Park
- Department of Physics and Astronomy, Institute of Applied Physics, Seoul National University, Seoul 08826, South Korea and Center for Correlated Electron Systems, Institute for Basic Science(IBS), Seoul 08826, South Korea
| | - J S Kwak
- Department of Physics and Astronomy, Institute of Applied Physics, Seoul National University, Seoul 08826, South Korea and Center for Correlated Electron Systems, Institute for Basic Science(IBS), Seoul 08826, South Korea
| | - Jinho Lee
- Department of Physics and Astronomy, Institute of Applied Physics, Seoul National University, Seoul 08826, South Korea and Center for Correlated Electron Systems, Institute for Basic Science(IBS), Seoul 08826, South Korea
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Park MS, Kim KT, Kang JS. Development of an analytical method for detecting nitrofurans in bee pollen by liquid chromatography–electrospray ionization tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2017; 1046:172-176. [DOI: 10.1016/j.jchromb.2016.11.042] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 11/24/2016] [Accepted: 11/30/2016] [Indexed: 10/20/2022]
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Choi SA, Shim HS, Jung JY, Kim HJ, Kim SH, Byun JY, Park MS, Yeo SG. Association between recovery from Bell's palsy and body mass index. Clin Otolaryngol 2017; 42:687-692. [PMID: 27886463 DOI: 10.1111/coa.12801] [Citation(s) in RCA: 15] [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] [Accepted: 11/20/2016] [Indexed: 11/29/2022]
Abstract
BACKGROUND Although many factors have been found to be involved in recovery from Bell's palsy, no study has investigated the association between recovery from Bell's palsy and obesity. This study therefore evaluated the association between recovery from Bell's palsy and body mass index (BMI). METHODS Subjects were classified into five groups based on BMI (kg/m2 ). Demographic and clinical characteristics were compared among these groups. Assessed factors included sex, age, time from paralysis to visiting a hospital, the presence of comorbidities such as diabetes mellitus and hypertension, degree of initial facial nerve paralysis by House-Brackmann (H-B) grade and neurophysiological testing, and final recovery rate. RESULTS Based on BMI, 37 subjects were classified as underweight, 169 as normal weight, 140 as overweight, 155 as obese and 42 as severely obese. Classification of the degree of initial facial nerve paralysis as moderate or severe, according to H-B grade and electroneurography, showed no difference in severity of initial facial paralysis among the five groups (P > 0.05). However, the final recovery rate was significantly higher in the normal weight than in the underweight or obese group (P < 0.05). CONCLUSIONS Obesity or underweight had no effect on the severity of initial facial paralysis, but the final recovery rate was lower in the obese and underweight groups than in the normal group.
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Affiliation(s)
- S A Choi
- Department of Otorhinolaryngology, School of Medicine, Kyung Hee University, Seoul, Korea
| | - H S Shim
- Department of Anesthesiology and Pain Medicine, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea
| | - J Y Jung
- Department of Anatomy, School of Medicine, Kyung Hee University, Seoul, Korea
| | - H J Kim
- Department of Otorhinolaryngology, School of Medicine, Kyung Hee University, Seoul, Korea
| | - S H Kim
- Department of Otorhinolaryngology, School of Medicine, Kyung Hee University, Seoul, Korea
| | - J Y Byun
- Department of Otorhinolaryngology, School of Medicine, Kyung Hee University, Seoul, Korea
| | - M S Park
- Department of Otorhinolaryngology, School of Medicine, Kyung Hee University, Seoul, Korea
| | - S G Yeo
- Department of Otorhinolaryngology, School of Medicine, Kyung Hee University, Seoul, Korea
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Abstract
OBJECTIVES Although vertebroplasty is very effective for relieving acute pain from an osteoporotic vertebral compression fracture, not all patients who undergo vertebroplasty receive the same degree of benefit from the procedure. In order to identify the ideal candidate for vertebroplasty, pre-operative prognostic demographic or clinico-radiological factors need to be identified. The objective of this study was to identify the pre-operative prognostic factors related to the effect of vertebroplasty on acute pain control using a cohort of surgically and non-surgically managed patients. PATIENTS AND METHODS Patients with single-level acute osteoporotic vertebral compression fracture at thoracolumbar junction (T10 to L2) were followed. If the patients were not satisfied with acute pain reduction after a three-week conservative treatment, vertebroplasty was recommended. Pain assessment was carried out at the time of diagnosis, as well as three, four, six, and 12 weeks after the diagnosis. The effect of vertebroplasty, compared with conservative treatment, on back pain (visual analogue score, VAS) was analysed with the use of analysis-of-covariance models that adjusted for pre-operative VAS scores. RESULTS A total of 342 patients finished the 12-week follow-up, and 120 patients underwent vertebroplasty (35.1%). The effect of vertebroplasty over conservative treatment was significant regardless of age, body mass index, medical comorbidity, previous fracture, pain duration, bone mineral density, degree of vertebral body compression, and canal encroachment. However, the effect of vertebroplasty was not significant at all time points in patients with increased sagittal vertical axis. CONCLUSIONS For single-level acute osteoporotic vertebral compression fractures, the effect of vertebroplasty was less favourable in patients with increased sagittal vertical axis (> 5 cm) possible due to aggravation of kyphotic stress from walking imbalance.Cite this article: Y-C. Kim, D. H. Bok, H-G. Chang, S. W. Kim, M. S. Park, J. K. Oh, J. Kim, T-H. Kim. Increased sagittal vertical axis is associated with less effective control of acute pain following vertebroplasty. Bone Joint Res 2016;5:544-551. DOI: 10.1302/2046-3758.511.BJR-2016-0135.R1.
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Affiliation(s)
- Y-C Kim
- Hallym University Sacred Heart Hospital, 896, Pyeongchon-Dong, Anyang City, Gyeonggi-Do, 431-070, South Korea
| | - D H Bok
- Hallym University Sacred Heart Hospital, 896, Pyeongchon-Dong, Anyang City, Gyeonggi-Do, 431-070, South Korea
| | - H-G Chang
- Hallym University Sacred Heart Hospital, 896, Pyeongchon-Dong, Anyang City, Gyeonggi-Do, 431-070, South Korea
| | - S W Kim
- Hallym University Sacred Heart Hospital, 896, Pyeongchon-Dong, Anyang City, Gyeonggi-Do, 431-070, South Korea
| | - M S Park
- Hallym University Sacred Heart Hospital, 896, Pyeongchon-Dong, Anyang City, Gyeonggi-Do, 431-070, South Korea
| | - J K Oh
- Hallym University Sacred Heart Hospital, 896, Pyeongchon-Dong, Anyang City, Gyeonggi-Do, 431-070, South Korea
| | - J Kim
- Green Hospital, Myeonmok dong, Jungnang-gu, Seoul, South Korea
| | - T-H Kim
- Hallym University Sacred Heart Hospital, 896, Pyeongchon-Dong, Anyang City, Gyeonggi-Do, 431-070, South Korea
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Kim BR, Seo SH, Park MS, Lee SH, Kwon Y, Rho SB. sMEK1 inhibits endothelial cell proliferation by attenuating VEGFR-2-dependent-Akt/eNOS/HIF-1α signaling pathways. Oncotarget 2016; 6:31830-43. [PMID: 26378810 PMCID: PMC4741643 DOI: 10.18632/oncotarget.5570] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2015] [Accepted: 08/15/2015] [Indexed: 12/31/2022] Open
Abstract
The suppressor of MEK null (sMEK1) protein possesses pro-apoptotic activities. In the current study, we reveal that sMEK1 functions as a novel anti-angiogenic factor by suppressing vascular endothelial growth factor (VEGF)-induced cell proliferation, migration, and capillary-like tubular structure in vitro. In addition, sMEK1 inhibited the phosphorylation of the signaling components up- and downstream of Akt, including phospholipase Cγ1 (PLC-γ1), 3-phosphoinositide-dependent protein kinase 1 (PDK1), endothelial nitric oxide synthetase (eNOS), and hypoxia-inducible factor 1 (HIF-1α) during ovarian tumor progression via binding with vascular endothelial growth factor receptor 2 (VEGFR-2). Furthermore, sMEK1 decreased tumor vascularity and inhibited tumor growth in a xenograft human ovarian tumor model. These results supply convincing evidence that sMEK1 controls endothelial cell function and subsequent angiogenesis by suppressing VEGFR-2-mediated PI3K/Akt/eNOS signaling pathway. Taken together, our results clearly suggest that sMEK1 might be a novel anti-angiogenic and anti-tumor agent for use in ovarian tumor.
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Affiliation(s)
- Boh-Ram Kim
- Research Institute, National Cancer Center, Ilsan-ro, Ilsandong-gu, Goyang-si Gyeonggi-do, Republic of Korea.,College of Pharmacy, Graduate School of Pharmaceutical Sciences, Ewha Global Top 5 Program, Ewha Womans University, Seoul, Republic of Korea
| | - Seung Hee Seo
- Research Institute, National Cancer Center, Ilsan-ro, Ilsandong-gu, Goyang-si Gyeonggi-do, Republic of Korea
| | - Mi Sun Park
- Research Institute, National Cancer Center, Ilsan-ro, Ilsandong-gu, Goyang-si Gyeonggi-do, Republic of Korea
| | - Seung-Hoon Lee
- Department of Life Science, Yong In University, Samga-dong, Cheoin-gu, Yongin-si Gyeonggi-do, Republic of Korea
| | - Youngjoo Kwon
- College of Pharmacy, Graduate School of Pharmaceutical Sciences, Ewha Global Top 5 Program, Ewha Womans University, Seoul, Republic of Korea
| | - Seung Bae Rho
- Research Institute, National Cancer Center, Ilsan-ro, Ilsandong-gu, Goyang-si Gyeonggi-do, Republic of Korea
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Park SI, Lee JH, Ham HJ, Jung YJ, Park MS, Lee J, Maeng LS, Chung YA, Jang KS. Evaluation of 2-[18F]-fluoro-2-deoxy-D-glucose positron emission tomography/computed tomography in rat models with hepatocellular carcinoma with liver cirrhosis. Biomed Mater Eng 2016; 26 Suppl 1:S1669-76. [PMID: 26405933 DOI: 10.3233/bme-151466] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Liver cirrhosis is a predominant risk factor for hepatocellular carcinoma (HCC). However, the exact mechanism of the progression from cirrhosis to cancer remains unclear. The uptake of 2-[(18)F]-fluoro-2-deoxy-D-glucose ((18)F-FDG) is widely used as a marker of increased glucose metabolism to monitor the progression of cancer with positron emission tomography (PET)/computed tomography (CT). Here we investigated the feasibility of using (18)F-FDG PET/CT in the diethylnitrosamine (DEN) mediated experimental hepatocellular carcinoma model. Rats received weekly intraperitoneal injections of DEN for 16 weeks for induction of HCC. We recorded starting from 0 days or 0 weeks after the last DEN injection. The weight and survival rate of rats were then measured. Also, an (18)F-FDG PET scan and serum analysis were performed at minus 2, 0, plus 2, and plus 4 weeks after the last DEN injection. The body weight of rats was maintained between 350 g and 370 g during 14 and 20 weeks, and the rats were euthanized at 35 days after the last DEN injection. The serum levels of alanine transaminase (ALT), aspartate transaminase (AST), and alkaline phosphate (ALP) were significantly higher at zero weeks after the last DEN injection. The (18)F-FDG uptake for the quantitative evaluation of HCC was done by measuring the region of interest (ROI). At minus two weeks after the last DEN injection, the ROI of rats had significantly increased compared to the normal group, in a time-dependent manner. These results suggest that FDG uptake serves as a good screening test to evaluate the feasibility of DEN-induced HCC.
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Affiliation(s)
- S I Park
- Institute of Catholic Integrative Medicine, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Incheon 403-720, The Republic of Korea
| | - J H Lee
- Laboratory of Molecular Pathology, Department of Pharmacy, College of Pharmacy, Seoul National University, Seoul 151-742, The Republic of Korea
| | - H J Ham
- Institute of Catholic Integrative Medicine, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Incheon 403-720, The Republic of Korea
| | - Y J Jung
- Institute of Catholic Integrative Medicine, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Incheon 403-720, The Republic of Korea
| | - M S Park
- Institute of Catholic Integrative Medicine, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Incheon 403-720, The Republic of Korea
| | - J Lee
- Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, IL 60064, USA
| | - L S Maeng
- Institute of Catholic Integrative Medicine, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Incheon 403-720, The Republic of Korea
| | - Y A Chung
- Institute of Catholic Integrative Medicine, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Incheon 403-720, The Republic of Korea.,Department of Radiology, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Incheon 403-720, The Republic of Korea
| | - K S Jang
- Institute of Catholic Integrative Medicine, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Incheon 403-720, The Republic of Korea.,Department of Neurosurgery, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Incheon 403-720, The Republic of Korea
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Lim Y, Kim K, Ko SH, Cho K, Jang EH, Lee SH, Lim DJ, Baek KH, Ha HS, Park MS, Yim HW, Lee WC, Yoon KH, Son HY, Oh KW, Kang MI. Gender- and age-group-specific associations between physical performance and bone mineral density, falls, and osteoporotic fractures in Koreans: the Chungju Metabolic Disease Cohort study. J Bone Miner Metab 2016; 34:336-46. [PMID: 26056017 DOI: 10.1007/s00774-015-0674-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2015] [Accepted: 04/08/2015] [Indexed: 10/23/2022]
Abstract
Several factors increase the risk of fragility fracture, including low bone mineral density, falls, and poor physical performance. The associations among these factors have been investigated; however, most of the subjects of previous studies were either elderly men or elderly women, and the associations were controversial. The aim of this study was to evaluate the associations between physical performance and bone mineral density, and the history of falls and fractures, stratified by gender and age group. We analyzed 5368 subjects who were aged 50 years or older, including 1288 younger men (younger than 70 years), 1615 younger women (younger than 70 years), 1087 older men (70 years or older), and 1378 older women (70 years or older). We used the one-leg standing time (OLST) for assessing static balance and the timed up-and-go test (TUGT) for assessing dynamic balance. The subjects in the worst performance quartile for the OLST were more likely to have osteoporosis than those in the best performance quartile. Additionally, women who had experienced a fracture during the past 2 years were 1.68 times more likely to be in the worst performance quartile for the OLST than women without a previous fracture. Although the TUGT time was not associated with either the incidence of osteoporosis or the fracture history, the odds ratios for falling were 1.51 and 1.28 as the TUGT time increased by one standard deviation in younger men and younger women, respectively. The findings of the present study show that the OLST was associated with the incidence of osteoporosis and previous fracture and that the TUGT time was associated with the incidence of falling.
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Affiliation(s)
- Yejee Lim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, 222 Banpo-daero Seocho-gu, Seoul, 137-701, South Korea
| | - Kyunghee Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, 222 Banpo-daero Seocho-gu, Seoul, 137-701, South Korea
| | - Sun-Hee Ko
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, 222 Banpo-daero Seocho-gu, Seoul, 137-701, South Korea
| | - Kwanhoon Cho
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, 222 Banpo-daero Seocho-gu, Seoul, 137-701, South Korea
| | - Eun-Hee Jang
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, 222 Banpo-daero Seocho-gu, Seoul, 137-701, South Korea
| | - Seung-Hwan Lee
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, 222 Banpo-daero Seocho-gu, Seoul, 137-701, South Korea
| | - Dong Jun Lim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, 222 Banpo-daero Seocho-gu, Seoul, 137-701, South Korea
| | - Ki Hyun Baek
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, 222 Banpo-daero Seocho-gu, Seoul, 137-701, South Korea
| | - Hee-Sung Ha
- Department of Preventive Medicine, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, 137-701, South Korea
| | - Mi Sun Park
- Clinical Research Coordinating Center, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, 137-701, South Korea
| | - Hyeon-Woo Yim
- Department of Preventive Medicine, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, 137-701, South Korea
- Clinical Research Coordinating Center, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, 137-701, South Korea
| | - Won-Chul Lee
- Department of Preventive Medicine, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, 137-701, South Korea
| | - Kun-Ho Yoon
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, 222 Banpo-daero Seocho-gu, Seoul, 137-701, South Korea
| | - Ho Young Son
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, 222 Banpo-daero Seocho-gu, Seoul, 137-701, South Korea
| | - Ki Won Oh
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, 29 Saemunan-ro, Jongno-gu, Seoul, 110-746, South Korea
| | - Moo-Il Kang
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, 222 Banpo-daero Seocho-gu, Seoul, 137-701, South Korea.
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Scott D, Park MS, Kim TN, Ryu JY, Hong HC, Yoo HJ, Baik SH, Jones G, Choi KM. Associations of Low Muscle Mass and the Metabolic Syndrome in Caucasian and Asian Middle-aged and Older Adults. J Nutr Health Aging 2016; 20:248-55. [PMID: 26892573 DOI: 10.1007/s12603-015-0559-z] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [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: 12/25/2022]
Abstract
OBJECTIVE Age-related declines in skeletal muscle mass may confer significant metabolic consequences for older adults. Associations of low muscle mass and metabolic syndrome (MetS) in Caucasians, and comparisons with associations observed in Asian populations, have not been reported. We examined associations of low muscle mass and metabolic syndrome (MetS) in Asian and Caucasian middle-aged and older men and women using criteria for low muscle mass. DESIGN, SETTING AND PARTICIPANTS Two population-based studies of Australian (Tasmanian Older Adult Cohort Study; TASOAC; N=1005) and Korean (Korean Sarcopenic Obesity Study; KSOS; N=376) community-dwelling adults, mean age 62 and 58 years, respectively. MEASUREMENTS Appendicular lean mass (aLM) determined by dual-energy X-ray absorptiometry and normalised to height squared (aLM/Ht2), weight (aLM/Wt) or body mass index (aLM/BMI). Participants in the lowest sex-specific 20% for aLM measures were defined as having low muscle mass. MetS was defined according to National Cholesterol Education Program Adult Treatment Panel III criteria. RESULTS Although Australians demonstrated generally unfavourable anthropometric and metabolic characteristics compared to Koreans, prevalence of MetS was similar (29.5% in Australians and 31.4% in Koreans, respectively). Low aLM/Ht2 was associated with significantly reduced likelihood of MetS in both Australians (OR: 0.30, 95% CI 0.19 - 0.46) and Koreans (OR: 0.31, 95% CI 0.16 - 0.62). Conversely, low aLM/BMI was associated with increased odds for MetS in Australians (OR: 1.78, 95% CI 1.12 - 2.84), but not Koreans (OR: 1.33, 95% CI = 0.67 - 2.64). CONCLUSION Low aLM/BMI is associated with significantly increased likelihood of MetS in Australian adults, but not Koreans, suggesting potential differences in effects of low muscle mass relative to body mass on cardiometabolic health in Caucasian and Asian middle-aged and older adults. Low muscle mass relative to height is associated with reduced likelihood of MetS in both populations.
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Affiliation(s)
- D Scott
- Prof. Kyung Mook Choi, Division of Endocrinology and Metabolism, Department of Internal Medicine, Korea University Guro Hospital, 80 Guro-Dong, Guro-Gu, Seoul 152-050, Korea. E-mail: , Tel.: 822-2626-3043, Fax: 822-2626-1096
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Sung KH, Min E, Chung CY, Jo BC, Park MS, Lee K. Measurements of surgeons' exposure to ionizing radiation dose: comparison of conventional and mini C-arm fluoroscopy. J Hand Surg Eur Vol 2016; 41:340-5. [PMID: 26115681 DOI: 10.1177/1753193415590388] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Accepted: 05/12/2015] [Indexed: 02/03/2023]
Abstract
This study was performed to measure the equivalent scattered radiation dose delivered to susceptible organs while simulating orthopaedic surgery using conventional and mini C-arm fluoroscopy. In addition, shielding effects on the thyroid, thymus, and gonad, and the direct exposure delivered to the patient's hands were also compared. A conventional and mini C-arms were installed in an operating room, and a hand and an operator phantom were used to simulate a patient's hand and a surgeon. Photoluminescence dosimeters were used to measure the equivalent dose by scattered radiation arriving at the thyroid, thymus, and gonad on a whole-body phantom in the position of the surgeon. Equivalent scattered radiation doses were measured in four groups: (1) unshielded conventional C-arm group; (2) unshielded mini C-arm group; (3) lead-shielded conventional C-arm group; and (4) lead-shielded mini C-arm group. Equivalent scattered radiation doses to the unshielded group were significantly lower in the mini C-arm group than those in the conventional C-arm group for all organs. The gonad in the lead-shielded conventional C-arm group showed the highest equivalent dose among operator-susceptible organs, and radiation dose was reduced by approximately 96% compared with that in the unshielded group. Scattered radiation was not detected in any susceptible organ in the lead-shielded mini C-arm group. The direct radiation dose to the hand phantom measured from the mini C-arm was significantly lower than that measured from the conventional C-arm. The results show that the equivalent scattered radiation dose to the surgeon's susceptible organs and the direct radiation dose to a patient's hand can be decreased significantly by using a mini C-arm rather than a conventional C-arm. However, protective lead garments, such as a thyroid shield and apron, should be applied to minimize radiation exposure to susceptible organs, even during use of mini C-arm fluoroscopy.
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Affiliation(s)
- K H Sung
- Department of Orthopaedic Surgery, Myongji Hospital, Kyungki, Korea
| | - E Min
- Department of IT Convergence, Korea University, Seoul, Korea
| | - C Y Chung
- Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, Kyungki, Korea
| | - B C Jo
- Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, Kyungki, Korea
| | - M S Park
- Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, Kyungki, Korea
| | - K Lee
- School of Biomedical Engineering, Korea University, Seoul, Korea
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Nguyen TMH, Shin IW, Lee TJ, Park J, Kim JH, Park MS, Lee EJ. Loss of ITM2A, a novel tumor suppressor of ovarian cancer through G2/M cell cycle arrest, is a poor prognostic factor of epithelial ovarian cancer. Gynecol Oncol 2016; 140:545-53. [DOI: 10.1016/j.ygyno.2015.12.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Revised: 12/05/2015] [Accepted: 12/11/2015] [Indexed: 10/22/2022]
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Kim SH, Jung SY, Kim MG, Byun JY, Park MS, Yeo SG. Comparison of steroid administration methods in patients with idiopathic sudden sensorineural hearing loss: a retrospective observational study. Clin Otolaryngol 2016; 40:183-90. [PMID: 25346100 DOI: 10.1111/coa.12342] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/19/2014] [Indexed: 12/01/2022]
Abstract
OBJECTIVES To compare the recovery rates of patients with idiopathic sudden sensorineural hearing loss (ISSHL) treated with oral systemic steroids (PO) or intratympanic steroid injection (IT) or both. DESIGN A retrospective observational study. SETTING Tertiary referral centre. PARTICIPANTS Eight hundred and forty-four patients diagnosed with ISSHL within 14 days of the onset of symptoms. The patients were divided into three groups by treatment modality. MAIN OUTCOME MEASURES Threshold of pure-tone tests, age, accompanying symptoms and underlying diseases were compared. The level of final hearing recovery was evaluated by the application of the results of the pure-tone test that was performed at least 3 months after the completion of each treatment. RESULTS Final hearing recovery rate differed significantly by the type of treatment (P = 0.031). Recovery rates in the PO and combined groups were significantly higher in patients with mild (85.1% and 88.6%, respectively) than with profound (52.8% and 69.0%, respectively) hearing loss (P < 0.05). In contrast, severity and recovery rate were not significantly correlated in the IT group (P > 0.05). Combined treatment yielded significantly higher recovery rates than other treatment modalities in patients without hypertension (HTN) and diabetes mellitus (DM) (P = 0.021). CONCLUSION In the group treated with combined therapy, better hearing improvement was obtained than in the groups treated with systemic steroid only or with intratympanic steroid injection only without complications. These findings suggest that the combination of systemic administration and intratympanic injection may improve patient prognosis.
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Affiliation(s)
- S H Kim
- Department of Otorhinolaryngology, School of Medicine, Kyung Hee University, Seoul, Korea
| | - S Y Jung
- Department of Otorhinolaryngology, School of Medicine, Kyung Hee University, Seoul, Korea
| | - M G Kim
- Department of Otorhinolaryngology Head and Neck Surgery, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea
| | - J Y Byun
- Department of Otorhinolaryngology, School of Medicine, Kyung Hee University, Seoul, Korea
| | - M S Park
- Department of Otorhinolaryngology, School of Medicine, Kyung Hee University, Seoul, Korea
| | - S G Yeo
- Department of Otorhinolaryngology, School of Medicine, Kyung Hee University, Seoul, Korea
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Jeh SK, Kim SH, Choi JJ, Jung SS, Choe BJ, Park S, Park MS. Comparison of automated breast ultrasonography to handheld ultrasonography in detecting and diagnosing breast lesions. Acta Radiol 2016; 57:162-9. [PMID: 25766727 DOI: 10.1177/0284185115574872] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [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: 12/20/2013] [Accepted: 02/02/2015] [Indexed: 11/16/2022]
Abstract
BACKGROUND Automated breast ultrasonography (ABUS) is increasingly used as a screening tool. Several studies have demonstrated a similar diagnostic performance for ABUS compared with handheld ultrasonography (HHUS), but the overall results have been controversial. PURPOSE To compare the clinical utility of ABUS and HHUS for detection and diagnosis of breast lesions. MATERIAL AND METHODS ABUS and HHUS images of suspicious breast lesions were obtained for 173 consecutive women scheduled to undergo ultrasonography (US)-guided or stereotactic biopsy. There were a total of 206 lesions, 46 of which were malignant and 160 benign. Three breast radiologists took part in this study: two reviewed the ABUS images, and the third reviewed all of the images, ABUS and HHUS, as well as the patients' medical records. The biopsied-lesion-detection rates were obtained. Using the Breast Imaging Reporting and Data System (BI-RADS), the images of the biopsied lesions were evaluated. Factors affecting ABUS detectability were analyzed. RESULTS The overall detection rates were 83.0% for ABUS and 94.2% for HHUS. Ten lesions were not detected on either HHUS or ABUS and these were microcalcifications (one malignancy and nine benign lesions). Of the 194 HHUS-detected lesions, 169 were detected by ABUS and 25 benign were not. ABUS less frequently detected lesions of smaller size as well as those of benign appearance and lower final-assessment category (P = 0.011 and P < 0.0001, respectively). CONCLUSION ABUS detected all of the malignant lesions that were detected on HHUS. ABUS missed several smaller benign lesions.
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Affiliation(s)
- Su Kyung Jeh
- Department of Radiology, Hallym University Medical Center, The Hallym University of Korea, Chuncheon, Republic of Korea
| | - Sung Hun Kim
- Department of Radiology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Jae Jeong Choi
- Department of Radiology, Hallym University Medical Center, The Hallym University of Korea, Chuncheon, Republic of Korea
| | - Sang Sul Jung
- Department of General Surgery, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Byung Joo Choe
- Department of General Surgery, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Sarah Park
- Department of Internal Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Mi Sun Park
- Department of Biostatistics, Clinical Research Coordinating Center, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
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Kim SK, Yoon W, Park MS, Heo TW, Baek BH, Lee YY. Outcomes Are Not Different between Patients with Intermediate and High DWI-ASPECTS after Stent-Retriever Embolectomy for Acute Anterior Circulation Stroke. AJNR Am J Neuroradiol 2016; 37:1080-5. [PMID: 26767711 DOI: 10.3174/ajnr.a4663] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Accepted: 11/23/2015] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Questions remain as to what benefits embolectomy provides to patients presented with considerable early ischemic changes on baseline imaging studies. This study aimed to investigate the impact of the Alberta Stroke Program Early CT Score applied to DWI on treatment outcomes in patients with acute stroke undergoing stent-retriever embolectomy. MATERIALS AND METHODS We retrospectively analyzed the clinical and DWI data from 171 patients with acute anterior circulation stroke who were treated with stent-retriever embolectomy within 6 hours of symptom onset. DWI-ASPECTS scores were analyzed with the full scale or were dichotomized (4-6 versus 7-10). Patients with DWI-ASPECTS ≤3 were excluded from the study. Associations between outcome and clinical and radiologic factors were determined with a multivariate logistic regression analysis. A good outcome was defined as a modified Rankin Scale score of 0-2 at 3 months. RESULTS The median DWI-ASPECTS was 7 (interquartile range, 6-8). The rates of good outcome, symptomatic hemorrhage, and mortality were not different between high DWI-ASPECTS (scores of 7-10) and intermediate DWI-ASPECTS (scores of 4-6) groups. In patients with an intermediate DWI-ASPECTS, good outcome was achieved in 46.5% (20/43) of patients with successful revascularization, whereas no patients without successful revascularization had a good outcome (P = .016). In multivariate logistic regression analysis, independent predictors of good outcome were age and successful revascularization. CONCLUSIONS Our study suggested that there were no differences in outcomes between patients with a high DWI-ASPECTS and those with an intermediate DWI-ASPECTS who underwent stent-retriever embolectomy for acute anterior circulation stroke. Thus, patients with an intermediate DWI-ASPECTS otherwise eligible for endovascular therapy may not be excluded from stent-retriever embolectomy or stroke trials.
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Affiliation(s)
- S K Kim
- From the Departments of Radiology (S.K.K., W.Y., T.W.H., B.H.B., Y.Y.L.)
| | - W Yoon
- From the Departments of Radiology (S.K.K., W.Y., T.W.H., B.H.B., Y.Y.L.)
| | - M S Park
- Neurology (M.S.P.), Chonnam National University Medical School, Chonnam National University Hospital, Gwangju, Republic of Korea
| | - T W Heo
- From the Departments of Radiology (S.K.K., W.Y., T.W.H., B.H.B., Y.Y.L.)
| | - B H Baek
- From the Departments of Radiology (S.K.K., W.Y., T.W.H., B.H.B., Y.Y.L.)
| | - Y Y Lee
- From the Departments of Radiology (S.K.K., W.Y., T.W.H., B.H.B., Y.Y.L.)
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Park MS, Kilburg C, Taussky P, Albuquerque FC, Kallmes DF, Levy EI, Jabbour P, Szikora I, Boccardi E, Hanel RA, Bonafé A, McDougall CG. Pipeline Embolization Device with or without Adjunctive Coil Embolization: Analysis of Complications from the IntrePED Registry. AJNR Am J Neuroradiol 2016; 37:1127-31. [PMID: 26767709 DOI: 10.3174/ajnr.a4678] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 11/18/2015] [Indexed: 12/18/2022]
Abstract
Flow diversion to treat cerebral aneurysms has revolutionized neurointerventional surgery. Because the addition of coils potentially increases the time and complexity of endovascular procedures, we sought to determine whether adjunctive coil use is associated with an increase in complications. Patients in the International Retrospective Study of Pipeline Embolization Device registry were divided into those treated with the Pipeline Embolization Device alone (n = 689 patients; n = 797 aneurysms; mean aneurysm size, 10.3 ± 7.6 mm) versus those treated with the Pipeline Embolization Device and concurrent coil embolization (n = 104 patients; n = 109 aneurysms; mean aneurysm size, 13.6 ± 7.8 mm). Patient demographics and aneurysm characteristics were examined. Rates of neurologic morbidity and mortality were compared between groups. The Pipeline Embolization Device with versus without coiling required a significantly longer procedure time (135.8 ± 63.9 versus 96.7 ± 46.2 min; P < .0001) and resulted in higher neurological morbidity (12.5% versus 7.8%; P = .13). These data suggest that either strategy represents an acceptable risk profile in the treatment of complex cerebral aneurysms and warrants further investigation.
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Affiliation(s)
- M S Park
- From the Department of Neurosurgery (M.S.P., C.K., P.T.), University of Utah Health Care, Salt Lake City, Utah
| | - C Kilburg
- From the Department of Neurosurgery (M.S.P., C.K., P.T.), University of Utah Health Care, Salt Lake City, Utah
| | - P Taussky
- From the Department of Neurosurgery (M.S.P., C.K., P.T.), University of Utah Health Care, Salt Lake City, Utah
| | - F C Albuquerque
- Department of Neurosurgery (F.C.A., C.G.M.), Barrow Neurological Institute, Phoenix, Arizona
| | - D F Kallmes
- Department of Radiology (D.F.K.), Mayo Clinic, Rochester, Minnesota
| | - E I Levy
- Department of Neurosurgery (E.I.L.), University of Buffalo, Buffalo, New York
| | - P Jabbour
- Department of Neurosurgery (P.J.), Thomas Jefferson University, Philadelphia, Pennsylvania
| | - I Szikora
- Department of Neurointerventions (I.S.), National Institute of Neurosciences, Budapest, Hungary
| | - E Boccardi
- Department of Neuroradiology (E.B.), Ospedale Niguarda Ca' Granda, Milan, Italy
| | - R A Hanel
- Department of Neurosurgery (R.A.H.), Baptist Health, Jacksonville, Florida
| | - A Bonafé
- Department of Neuroradiology (A.B.), Hôpital Gui de Chauliac, Montpellier, France
| | - C G McDougall
- Department of Neurosurgery (F.C.A., C.G.M.), Barrow Neurological Institute, Phoenix, Arizona
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Park SH, Jung MH, Cho WK, Park MS, Suh BK. Incretin secretion in obese Korean children and adolescents with newly diagnosed type 2 diabetes. Clin Endocrinol (Oxf) 2016; 84:72-9. [PMID: 25903996 DOI: 10.1111/cen.12802] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Revised: 12/28/2014] [Accepted: 04/16/2015] [Indexed: 12/25/2022]
Abstract
OBJECTIVE The role of incretins in type 2 diabetes is controversial. This study investigated the association between incretin levels in obese Korean children and adolescents newly diagnosed with type 2 diabetes. DESIGN We performed a 2-hr oral glucose tolerance test (OGTT) in obese children and adolescents with type 2 diabetes and with normal glucose tolerance. PATIENTS Twelve obese children and adolescents with newly diagnosed type 2 diabetes (DM group) and 12 obese age-matched subjects without type 2 diabetes (NDM group) were included. MEASUREMENTS An OGTT was conducted and insulin, C-peptide, glucagon, glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP) were measured during the OGTT. RESULTS The mean age of the patients was 13·8 ± 2·0 years, and the mean body mass index (BMI) Z-score was 2·1 ± 0·5. The groups were comparable in age, sex, BMI Z-score and waist:hip ratio. The DM group had significantly lower homeostasis model assessment of β and insulinogenic index values (P < 0·001). The homeostasis model assessment of insulin resistance index was not different between the two groups. Insulin and C-peptide secretions were significantly lower in the DM group than in the NDM group (P < 0·001). Total GLP-1 secretion was significantly higher in the DM group while intact GLP-1 and GIP secretion values were not significantly different between the two groups. CONCLUSION Impaired insulin secretion might be important in the pathogenesis of type 2 diabetes in obese Korean children and adolescents, however, which may not be attributed to incretin secretion.
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Affiliation(s)
- So Hyun Park
- Department of Pediatrics, College of Medicine, St. Vincent's Hospital, The Catholic University of Korea, Gyeonggi, Korea
| | - Min Ho Jung
- Department of Pediatrics, College of Medicine, Yeouido St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - Won Kyoung Cho
- Department of Pediatrics, College of Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - Mi Sun Park
- Department of Biostatistics, Clinical Research Coordinating Center, The Catholic University of Korea, Seoul, Korea
| | - Byung Kyu Suh
- Department of Pediatrics, College of Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
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Lee JM, Kim CY, Shin JH, Lee SH, Song JH, Park MS, Kim YS, Kim SK, Chang J, Chung KS. EPH-ephrin signaling in hyperoxia induced lunginjury. Intensive Care Med Exp 2015. [PMCID: PMC4798300 DOI: 10.1186/2197-425x-3-s1-a563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Park MS, Sung SJ, Kim DH. Fabrication of Double-Layered TiO2 Films with Nanosphere Light Scatterers by One-Step Soaking Method. J Nanosci Nanotechnol 2015; 15:7781-7786. [PMID: 26726412 DOI: 10.1166/jnn.2015.11131] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Nanostructured TiO2 films with a double-layered structure are prepared by a lacile one-step soaking method. We have investigated the morphology of nanostructured TiO2 films according to the reaction time, concentration of the reactant, and reaction temperature of the soaking reaction, which all have a significant effect on the thickness and layered-structure of the nanostructured TiO2 films. The TiO2 films prepared by this soaking method have a unique double-layered structure, which is composed of a dense TiO2 bottom layer and stacked TiO2 nanospheres on the top layer. The growth of TiO2 nanospheres on the top of the double-layered TiO2 films shows stepwise behavior, which means there are two different growth mechanisms resulting in the dense TiO2 bottom layer and the spherical TiO2 top layer. There is an optimum reactant concentration and reaction temperature for achieving double-layered TiO2 films, which can be explained by the theory of nanoparticle synthesis. The stacked TiO2 nanospheres of double-layered TiO2 films contribute to the light scattering effects of TiO2 films, which could be used for the performance improvement of TiO2 photoelectrodes for sensitized solar cells.
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Levitt MR, Park MS, Albuquerque FC, Moon K, Kalani MYS, McDougall CG. Posterior Inferior Cerebellar Artery Patency after Flow-Diverting Stent Treatment. AJNR Am J Neuroradiol 2015; 37:487-9. [PMID: 26427829 DOI: 10.3174/ajnr.a4550] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Accepted: 08/12/2015] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE The rate of PICA occlusion after flow-diverting stent placement for vertebral and vertebrobasilar artery aneurysms is not known. The purpose of this study is to determine the medium-term rate of PICA patency and risk factors for occlusion after such aneurysm treatment. MATERIALS AND METHODS Patients were identified who had vertebral or vertebrobasilar artery aneurysms and who were treated by placing a flow-diverting stent across the PICA ostium. Demographic and procedural factors associated with stent placement were recorded. Patency of the PICA was evaluated immediately after stent placement and on follow-up angiography. RESULTS Thirteen patients with vertebral or vertebrobasilar artery aneurysms were treated in the study period, of whom 4 presented with subarachnoid hemorrhage. The average number of devices that spanned the PICA ostium was 1.77 (range, 1-3), with no immediate PICA occlusions. There were no postoperative strokes in the treated PICA territory, although there was 1 contralateral PICA-territory stroke of unclear etiology without clinical sequelae. In 11 patients with follow-up angiography at a mean of 10.6 months (range, 0.67-27.9 months), the PICA patency rate remained 100%. CONCLUSIONS Flow-diverting stent placement across the PICA ostium in the treatment of vertebral and vertebrobasilar artery aneurysms may not result in immediate or midterm PICA occlusion.
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Affiliation(s)
- M R Levitt
- From the Division of Neurological Surgery (M.R.L., F.C.A., K.M., M.Y.S.K., C.G.M.), Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona
| | - M S Park
- Departments of Neurosurgery and Radiology (M.S.P.), University of Utah, Salt Lake City, Utah
| | - F C Albuquerque
- From the Division of Neurological Surgery (M.R.L., F.C.A., K.M., M.Y.S.K., C.G.M.), Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona
| | - K Moon
- From the Division of Neurological Surgery (M.R.L., F.C.A., K.M., M.Y.S.K., C.G.M.), Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona
| | - M Y S Kalani
- From the Division of Neurological Surgery (M.R.L., F.C.A., K.M., M.Y.S.K., C.G.M.), Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona
| | - C G McDougall
- From the Division of Neurological Surgery (M.R.L., F.C.A., K.M., M.Y.S.K., C.G.M.), Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona
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Lee SH, Lee JM, Kim CY, Park MS, Park BH, Jung WJ, Kim SY, Kim EY, Jung JY, Kang YA, Kim YS, Kim SK, Chang J, Chung KS. Prognostic implications of serum lipid metabolism over time during sepsis. Intensive Care Med Exp 2015. [PMCID: PMC4798139 DOI: 10.1186/2197-425x-3-s1-a226] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Kim SK, Yoon W, Kim TS, Kim HS, Heo TW, Park MS. Histologic Analysis of Retrieved Clots in Acute Ischemic Stroke: Correlation with Stroke Etiology and Gradient-Echo MRI. AJNR Am J Neuroradiol 2015; 36:1756-62. [PMID: 26159515 PMCID: PMC7968760 DOI: 10.3174/ajnr.a4402] [Citation(s) in RCA: 151] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Accepted: 02/06/2015] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE It is unclear whether clot composition analysis is helpful to predict a stroke mechanism in acute large vessel occlusion. In addition, the relationship between early vessel signs on imaging studies and clot compositions has been poorly understood. The purpose of this study was to elucidate the relationship between clot composition and stroke etiology following mechanical thrombectomy and to investigate the effect of varied clot compositions on gradient-echo MR imaging of clots. MATERIALS AND METHODS Histopathologic analysis of retrieved clots from 37 patients with acute MCA occlusion was performed. Patients underwent gradient-echo imaging before endovascular therapy. Retrieved clots underwent semiquantitative proportion analysis to quantify red blood cells, fibrin, platelets, and white blood cells by area. Correlations between clot compositions and stroke subtypes and susceptibility vessel signs on gradient-echo imaging were assessed. RESULTS Stroke etiology was classified as cardioembolism in 22 patients (59.4%), large-artery atherosclerosis in 8 (21.6%), and undetermined in 7 (18.9%). The clots from cardioembolism had a significantly higher proportion of red blood cells (37.8% versus 16.9%, P = .031) and a lower proportion of fibrin (32.3% versus 48.5%, P = .044) compared with those from large-artery atherosclerosis. The proportion of red blood cells was significantly higher in clots with a susceptibility vessel sign than in those without it (48.0% versus 1.9%, P < .001), whereas the proportions of fibrin (26.4% versus 57.0%, P < .001) and platelets (22.6% versus 36.9%, P = .011) were significantly higher in clots without a susceptibility vessel sign than those with it. CONCLUSIONS The histologic composition of clots retrieved from cerebral arteries in patients with acute stroke differs between those with cardioembolism and large-artery atherosclerosis. In addition, a susceptibility vessel sign on gradient-echo imaging is strongly associated with a high proportion of red blood cells and a low proportion of fibrin and platelets in retrieved clots.
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Affiliation(s)
- S K Kim
- From the Departments of Radiology (S.K.K., W.Y., T.W.H.)
| | - W Yoon
- From the Departments of Radiology (S.K.K., W.Y., T.W.H.)
| | | | | | - T W Heo
- From the Departments of Radiology (S.K.K., W.Y., T.W.H.)
| | - M S Park
- Neurology (M.S.P.), Chonnam National University Medical School, Chonnam National University Hospital, Gwangju, Republic of Korea
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Kang N, Choi SY, Kim YK, Yoo IR, Han DH, Lee DS, Kim YS, Hong SH, Kang JH, Lee KY, Park JK, Sung SW, Park MS, Yim HW, Kim SJ, Park JY. Silencing of miR-137 by aberrant promoter hypermethylation in surgically resected lung cancer. Lung Cancer 2015; 89:99-103. [DOI: 10.1016/j.lungcan.2015.05.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2015] [Revised: 04/13/2015] [Accepted: 05/13/2015] [Indexed: 01/05/2023]
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Kim JM, Park KY, Lee WJ, Byun JS, Kim JK, Park MS, Ahn SW, Shin HW. The cortical contrast accumulation from brain computed tomography after endovascular treatment predicts symptomatic hemorrhage. Eur J Neurol 2015; 22:1453-8. [PMID: 26130213 DOI: 10.1111/ene.12764] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [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: 01/12/2015] [Accepted: 05/07/2015] [Indexed: 11/27/2022]
Abstract
BACKGROUND AND PURPOSE The prognostic value of contrast accumulation from non-contrast brain computed tomography taken immediately after endovascular reperfusion treatment in acute ischaemic stroke patients to predict symptomatic hemorrhage was studied. METHODS Between July 2007 and August 2014, acute anterior circulation ischaemic stroke patients who were treated by intra-arterial thrombolysis or thrombectomy were included. Contrast accumulation was defined as a high attenuation area from non-contrast brain computed tomography immediately taken after endovascular reperfusion treatment, and patients were categorized into three groups according to the presence and location of contrast: (i) negative, (ii) cortical involvement and (iii) non-cortical involvement. The rates of symptomatic hemorrhage after 24 h and functional outcome at discharge were compared between patients with and without cortical involvement. RESULTS Of 64 patients who were treated by endovascular intervention, contrast accumulation was detected in 56, including 33 patients with cortical involvement and 23 patients without cortical involvement. The cortical involvement pattern was more frequently associated with symptomatic hemorrhage (13 vs. 1 patient, P = 0.003) and with grave outcome at discharge with modified Rankin Scale 5 or 6 (14 vs. 4, P = 0.048) than the non-cortical involvement group. Multivariate logistic regression analysis including initial collateral status and occlusion site disclosed that cortical involvement pattern independently predicted symptomatic hemorrhage after endovascular treatment (odds ratio 19.0, confidence interval 1.6-227.6, P = 0.020). CONCLUSION Our study provides evidence that the cortical involvement of contrast accumulation is associated with symptomatic hemorrhage after endovascular reperfusion treatment.
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Affiliation(s)
- J M Kim
- Department of Neurology, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul, Korea
| | - K Y Park
- Department of Neurology, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul, Korea
| | - W J Lee
- Department of Neuroradiology, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul, Korea
| | - J S Byun
- Department of Neuroradiology, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul, Korea
| | - J K Kim
- Department of Neuroradiology, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul, Korea
| | - M S Park
- Department of Neurology, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul, Korea
| | - S W Ahn
- Department of Neurology, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul, Korea
| | - H W Shin
- Department of Neurology, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul, Korea
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Yeo CD, Park GS, Kang N, Choi SY, Kim HY, Lee DS, Kim YS, Kim YK, Park JK, Sung SW, Lee KY, Park MS, Yim HW, Kim SJ, Lee JH. Erratum to: Bis Expression in Patients with Surgically Resected Lung Cancer and its Clinical Significance. Ann Surg Oncol 2015; 22 Suppl 3:S1615. [PMID: 26023039 DOI: 10.1245/s10434-015-4645-6] [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: 11/18/2022]
Affiliation(s)
- Chang Dong Yeo
- Division of Pulmonology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Gyeong Sin Park
- Department of Hospital Pathology, The Catholic University of Korea, Seoul, Republic of Korea.,The Cancer Research Institute, The Catholic University of Korea, Seoul, Republic of Korea
| | - Nahyeon Kang
- Division of Pulmonology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.,The Cancer Research Institute, The Catholic University of Korea, Seoul, Republic of Korea
| | - Su Yeon Choi
- Division of Pulmonology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.,The Cancer Research Institute, The Catholic University of Korea, Seoul, Republic of Korea
| | - Hye Yun Kim
- The Cancer Research Institute, The Catholic University of Korea, Seoul, Republic of Korea.,Department of Biochemistry, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.,Cancer Evolution Research Center, The Catholic University of Korea, Seoul, Republic of Korea
| | - Dong Soo Lee
- Department of Radiation Oncology, The Catholic University of Korea, Seoul, Republic of Korea
| | - Yeon Sil Kim
- Department of Radiation Oncology, The Catholic University of Korea, Seoul, Republic of Korea
| | - Young Kyoon Kim
- Division of Pulmonology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Jae Kil Park
- Department of Thoracic Surgery, The Catholic University of Korea, Seoul, Republic of Korea
| | - Sook Whan Sung
- Department of Thoracic Surgery, The Catholic University of Korea, Seoul, Republic of Korea
| | - Kyo Young Lee
- Department of Hospital Pathology, The Catholic University of Korea, Seoul, Republic of Korea
| | - Mi Sun Park
- Department of Biostatistics, The Catholic University of Korea, Seoul, Republic of Korea.,Clinical Research Coordinating Center, The Catholic University of Korea, Seoul, Republic of Korea
| | - Hyeon Woo Yim
- Department of Biostatistics, The Catholic University of Korea, Seoul, Republic of Korea.,Clinical Research Coordinating Center, The Catholic University of Korea, Seoul, Republic of Korea
| | - Seung Joon Kim
- Division of Pulmonology, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea. .,The Cancer Research Institute, The Catholic University of Korea, Seoul, Republic of Korea.
| | - Jeong-Hwa Lee
- The Cancer Research Institute, The Catholic University of Korea, Seoul, Republic of Korea. .,Department of Biochemistry, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea. .,Cancer Evolution Research Center, The Catholic University of Korea, Seoul, Republic of Korea.
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Yeo CD, Park GS, Kang N, Choi SY, Kim HY, Lee DS, Kim YS, Kim YK, Park JG, Sung SW, Lee KY, Park MS, Yim HW, Kim SJ, Lee JH. Bis Expression in Patients with Surgically Resected Lung Cancer and its Clinical Significance. Ann Surg Oncol 2015; 22 Suppl 3:S1365-70. [DOI: 10.1245/s10434-015-4576-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2015] [Indexed: 11/18/2022]
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Park MS, Dong SM, Kim BR, Seo SH, Kang S, Lee EJ, Lee SH, Rho SB. Thioridazine inhibits angiogenesis and tumor growth by targeting the VEGFR-2/PI3K/mTOR pathway in ovarian cancer xenografts. Oncotarget 2015; 5:4929-34. [PMID: 24952635 PMCID: PMC4148111 DOI: 10.18632/oncotarget.2063] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Thioridazine, a member of the phenothiazine family, is a powerful anti-anxiety and anti-psychotic drug. It can also suppress the growth of several types of tumor in vitro. In the current study, we evaluated the direct anti-tumor and anti-angiogenic effects of thioridazine in vivo. The injection of thioridazine into human ovarian tumor xenografts in nude mice significantly inhibited tumor growth by ~fivefold, and also decreased tumor vascularity. In addition, thioridazine inhibited the phosphorylation of the signaling molecules downstream of phosphatidylinositol-3’-kinase (PI3K), including Akt, phosphoinositide-dependent protein kinase 1 (PDK1), and mammalian target of rapamycin (mTOR), during ovarian tumor progression via vascular endothelial growth factor receptor 2 (VEGFR-2). These results provide convincing evidence that thioridazine regulates endothelial cell function and subsequent angiogenesis by inhibiting VEGFR-2/PI3K/mTOR signal transduction. Collectively, these results strongly suggest that thioridazine might be a novel anti-tumor and anti-angiogenic agent for use in ovarian cancer.
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Affiliation(s)
- Mi Sun Park
- Research Institute, National Cancer Center, 323, Ilsan-ro, Ilsandong-gu, Goyang-si Gyeonggi-do, Republic of Korea
| | | | | | | | | | | | | | - Seung Bae Rho
- Research Institute, National Cancer Center, 323, Ilsan-ro, Ilsandong-gu, Goyang-si Gyeonggi-do, Republic of Korea
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Park MS, Kim BR, Dong SM, Lee SH, Kim DY, Rho SB. The antihypertension drug doxazosin inhibits tumor growth and angiogenesis by decreasing VEGFR-2/Akt/mTOR signaling and VEGF and HIF-1α expression. Oncotarget 2015; 5:4935-44. [PMID: 24952732 PMCID: PMC4148112 DOI: 10.18632/oncotarget.2064] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Doxazosin is an α1 adrenergic receptor blocker that also exerts antitumor effects. However, the underlying mechanisms by which it modulates PI3K/Akt intracellular signaling are poorly understood. In this study, we reveal that doxazosin functions as a novel antiangiogenic agent by inhibiting vascular endothelial growth factor (VEGF)-induced cell migration and proliferation. It also inhibited VEGF-induced capillary-like structure tube formation in vitro. Doxazosin inhibited the phosphorylation of VEGF receptor-2 (VEGFR-2) and downstream signaling, including PI3K, Akt, 3-phosphoinositide-dependent protein kinase 1 (PDK1), mammalian target of rapamycin (mTOR), and hypoxia-inducible factor 1 (HIF-1α). However, it had no effect on VEGF-induced extracellular signal-regulated kinase 1/2 (ERK1/2) phosphorylation. Furthermore, doxazosin reduced tumor growth and suppressed tumor vascularization in a xenograft human ovarian cancer model. These results provide evidence that doxazosin functions in the endothelial cell system to modulate angiogenesis by inhibiting Akt and mTOR phosphorylation and interacting with VEGFR-2.
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Affiliation(s)
- Mi Sun Park
- Research Institute, National Cancer Center, 323, Ilsan-ro, Ilsandong-gu, Goyang-si Gyevonggi-do, Republic of Korea; Department of Veterinary Pathology, College of Veterinary Medicine, Seoul National University, 599, Gwanank-ro, Gwanakgu, Seoul, Republic of Korea
| | | | | | | | | | - Seung Bae Rho
- Research Institute, National Cancer Center, 323, Ilsan-ro, Ilsandong-gu, Goyang-si Gyevonggi-do, Republic of Korea
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Abstract
OBJECTIVES The effectiveness of antiviral agents for the treatment of Bell's palsy is uncertain. We evaluated whether a steroid with an antiviral agent (S + A group) provided better recovery outcomes than a steroid alone (S group) in patients with Bell's palsy. SUBJECTS AND DESIGN A total of 1342 patients diagnosed with Bell's palsy who visited the Kyung Hee Medical Center in Seoul, Korea, from 2002 to 2012 were included in this study. Patients in the S + A group were treated with prednisolone and antiviral agents (n = 569) and those in the S group with prednisolone alone (n = 773). Outcomes were measured using the House-Brackmann (HB) scale according to age, initial disease severity, electroneurography (ENoG) findings and underlying comorbidities. RESULTS The rate of recovery (HB grades I and II) with initially severe Bell's palsy (HB grades V and VI) was higher in the S + A than in the S group (P = 0.001). However, the rates of recovery were similar with initially moderate palsy (HB grades II-IV) (P = 0.502). In patients classified according to age and ENoG-determined severity of palsy, the overall recovery rate was higher in the S + A than in the S group, but the differences were not statistically significant (P > 0.05 for both). The recovery rate without diabetes mellitus (DM) and hypertension (HTN) was higher in the S + A group than in the S group (P = 0.031). But in the patients with HTN and DM, the difference in recovery rates between the S + A and S groups was not statistically significant (P = 0.805). CONCLUSIONS Treatment with a steroid plus antiviral agent resulted in significantly higher recovery rates than steroid therapy alone in patients with initially severe Bell's palsy and without either HTN or DM, and a nonsignificant trend towards higher recovery rates in all patients with Bell's palsy in this study. Antiviral agents may therefore help in the treatment of Bell's palsy.
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Affiliation(s)
- H M Kang
- Department of Otorhinolaryngology, School of Medicine, Kyung Hee University, Seoul, Korea
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Abstract
Peritoneal dialysis is associated with several metabolic and nutritional abnormalities, some of which are related to the use of glucose-based solutions. Furthermore, the catabolic effects of uremia per se, protein and amino acid losses into the dialysate, peritonitis and poor appetite contribute to amino acid abnormalities, negative nitrogen balance and a high prevalence of malnutrition in peritoneal dialysis patients. To overcome these problems the use of amino acid instead of glucose as an osmotic agent has been proposed. Short-term studies have shown that amino acid-based solutions in peritoneal dialysis may supplement in excess the daily losses of amino acids during dialysis with glucose-based solutions. The amino acid solutions produce similar ultrafiltration and solute transport as the standard glucose solutions although the period of effective ultrafiltration is rather short. However, it should be noted that some studies have reported that the transport of small and large solutes may increase in patients using amino acid solutions. During the early 1980s several investigators have developed and tested different amino acid solutions for peritoneal dialysis. The initial clinical experience from Toronto with amino acid solutions containing large amounts of non-essential amino acids and inadequate amount of buffer were in general discouraging. The patients, who were not always malnourished and tended to have a low energy intake, developed increased BUN levels, acidosis, no improvement in nutritional status or amino acid abnormalities and, in some cases, anorexia. In 1985 a new 1% amino acid solution, containing an increased buffer amount and amino acids (mainly essential) in proportions which take the amino acid abnormalities in uremic patients into account, became available. The use of this solution resulted in some improvement in amino acid pattern and nutritional parameters, but acidosis and increased BUN levels remained problems. The experiences from these and previous studies showed that: (1) the improvement of the composition of amino acid solutions was beneficial; (2) a further increase of the buffer amount was needed; (3) patients included should have signs of protein malnutrition combined with low dietary protein intake to benefit from intraperitoneal amino acid supply, and (4) energy intake should be sufficient to prevent amino acids to end up as energy source. For this purpose a new improved 1.1% amino acid solution has been developed containing a further increase of some essential amino acids and an increased amount of lactate (40 mmol/l). This solution has been tested in malnourished patients eating 0.8 g protein/kg/day and 25-30 kcal/kg/day.(ABSTRACT TRUNCATED AT 400 WORDS)
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Affiliation(s)
- B Lindholm
- Department of Renal Medicine, Huddinge University Hospital, Karolinska Institute, Stockholm, Sweden
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Kim SK, Yoon W, Heo TW, Park MS, Kang HK. Negative Susceptibility Vessel Sign and Underlying Intracranial Atherosclerotic Stenosis in Acute Middle Cerebral Artery Occlusion. AJNR Am J Neuroradiol 2015; 36:1266-71. [PMID: 25814657 DOI: 10.3174/ajnr.a4280] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2014] [Accepted: 01/14/2015] [Indexed: 12/15/2022]
Abstract
BACKGROUND AND PURPOSE The role of MR imaging in predicting underlying intracranial atherosclerotic stenosis before endovascular stroke therapy has not been studied. Our aim was to determine the diagnostic value of the negative susceptibility vessel sign on T2*-weighted gradient-echo MR imaging for predicting underlying intracranial atherosclerotic stenosis in patients with acute MCA occlusion. MATERIALS AND METHODS Ninety-one consecutive patients with acute stroke because of MCA occlusion underwent gradient-echo MR imaging and MRA before endovascular therapy. The negative susceptibility vessel sign was defined as an absence of a hypointense signal change within the occluded MCA on gradient-echo imaging. Underlying intracranial atherosclerotic stenosis was determined by conventional angiography. The sensitivity, specificity, predictive values, and accuracy of the negative susceptibility vessel sign for predicting the presence of underlying intracranial atherosclerotic stenosis were assessed. RESULTS The negative susceptibility vessel sign was identified in 42 (46.1%) of 91 patients, and 18 (19.8%) patients had an underlying intracranial atherosclerotic stenosis responsible for acute ischemic symptoms. The negative susceptibility vessel sign was more frequently observed in patients with intracranial atherosclerotic stenosis than in those without it (100% versus 32.9%, P < .001). In the prediction of an underlying intracranial atherosclerotic stenosis, the negative susceptibility vessel sign had 100% sensitivity, 67.1% specificity, 42.9% positive predictive value, 100% negative predictive value, and an accuracy of 73.6%. CONCLUSIONS The negative susceptibility vessel sign on gradient-echo MR imaging is a sensitive marker with a high negative predictive value for the presence of an underlying intracranial atherosclerotic stenosis in patients with acute ischemic stroke because of MCA occlusions. The susceptibility vessel sign can be used in decision-making when performing subsequent endovascular revascularization therapy in patients with acute MCA occlusions.
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Affiliation(s)
- S K Kim
- From the Departments of Radiology (S.K.K., W.Y., T.W.H., H.K.K.)
| | - W Yoon
- From the Departments of Radiology (S.K.K., W.Y., T.W.H., H.K.K.)
| | - T W Heo
- From the Departments of Radiology (S.K.K., W.Y., T.W.H., H.K.K.)
| | - M S Park
- Neurology (M.S.P.), Chonnam National University Medical School, Chonnam National University Hospital, Gwangju, Republic of Korea
| | - H K Kang
- From the Departments of Radiology (S.K.K., W.Y., T.W.H., H.K.K.)
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