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Sung H, Lloyd TE. Disrupted endoplasmic reticulum-mediated autophagosomal biogenesis in a Drosophila model of C9-ALS-FTD. Autophagy 2024; 20:94-113. [PMID: 37599467 PMCID: PMC10761023 DOI: 10.1080/15548627.2023.2249750] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 08/08/2023] [Accepted: 08/11/2023] [Indexed: 08/22/2023] Open
Abstract
ABBREVIATIONS 3R: UAS construct expressing 3 G4C2 repeats (used as control); 3WJ: three-way junction; 12R: UAS construct expressing leader sequence and 12 G4C2 repeats; 30R: UAS construct expressing 30 G4C2 repeats; 36R: UAS construct expressing 36 G4C2 repeats; 44R: UAS construct expressing leader sequence and 44 G4C2 repeats; ALS: amyotrophic lateral sclerosis; Atg: autophagy related; atl: atlastin; C9-ALS-FTD: ALS or FTD caused by hexanuleotide repeat expansion in C9orf72; ER: endoplasmic reticulum; FTD: frontotemporal dementia; HRE: GGGGCC hexanucleotide repeat expansion; HSP: hereditary spastic paraplegia; Lamp1: lysosomal associated membrane protein 1; MT: microtubule; NMJ: neuromuscular junction; Rab: Ras-associated binding GTPase; RAN: repeat associated non-AUG (RAN) translation; RO-36: UAS construct expression "RNA-only" version of 36 G4C2 repeats in which stop codons in all six reading frames are inserted.; Rtnl1: Reticulon-like 1; SN: segmental nerve; TFEB/Mitf: transcription factor EB/microphthalmia associated transcription factor (Drosophila ortholog of TFEB); TrpA1: transient receptor potential cation channel A1; VAPB: VAMP associated protein B and C; VNC: ventral nerve cord (spinal cord in Drosophila larvae).
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Affiliation(s)
- Hyun Sung
- Department of Neurology, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
- The Solomon H. Snyder Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
| | - Thomas E. Lloyd
- Department of Neurology, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
- The Solomon H. Snyder Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
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Dubey SK, Maulding K, Sung H, Lloyd TE. Nucleoporins are degraded via upregulation of ESCRT-III/Vps4 complex in Drosophila models of C9-ALS/FTD. Cell Rep 2022; 40:111379. [PMID: 36130523 PMCID: PMC10099287 DOI: 10.1016/j.celrep.2022.111379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 03/22/2022] [Accepted: 08/28/2022] [Indexed: 11/03/2022] Open
Abstract
Disruption of the nuclear pore complex (NPC) and nucleocytoplasmic transport (NCT) have been implicated in the pathogenesis of neurodegenerative diseases. A GGGGCC hexanucleotide repeat expansion (HRE) in an intron of the C9orf72 gene is the most common genetic cause of amyotrophic lateral sclerosis and frontotemporal dementia, but the mechanism by which the HRE disrupts NCT is incompletely understood. We find that expression of GGGGCC repeats in Drosophila neurons induces proteasome-mediated degradation of select nucleoporins of the NPC. This process requires the Vps4 ATPase and the endosomal-sorting complex required for transport complex-III (ESCRT-III), as knockdown of ESCRT-III/Vps4 genes rescues nucleoporin levels, normalizes NCT, and suppresses GGGGCC-mediated neurodegeneration. GGGGCC expression upregulates nuclear ESCRT-III/Vps4 expression, and expansion microscopy demonstrates that the nucleoporins are translocated into the cytoplasm before undergoing proteasome-mediated degradation. These findings demonstrate a mechanism for nucleoporin degradation and NPC dysfunction in neurodegenerative disease.
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Affiliation(s)
- Sandeep Kumar Dubey
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Kirstin Maulding
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA; Cellular and Molecular Medicine Program, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Hyun Sung
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Thomas E Lloyd
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA; Cellular and Molecular Medicine Program, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA; The Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
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Sung H, Lloyd TE. Defective axonal transport of endo-lysosomes and dense core vesicles in a Drosophila model of C9-ALS/FTD. Traffic 2022; 23:430-441. [PMID: 35908282 DOI: 10.1111/tra.12861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 06/28/2022] [Accepted: 07/26/2022] [Indexed: 10/16/2022]
Abstract
A GGGGCC (G4 C2 ) repeat expansion in the C9orf72 gene is the most common genetic cause of amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). Although disruptions in axonal transport are implicated in the pathogenesis of multiple neurodegenerative diseases, the underlying mechanisms causing these defects remain unclear. Here, we performed live imaging of Drosophila motor neurons expressing expanded G4 C2 repeats in third-instar larvae and investigated the axonal transport of multiple organelles in vivo. Expression of expanded G4 C2 repeats causes an increase in static axonal lysosomes, while it impairs trafficking of late endosomes (LEs) and dense core vesicles (DCVs). Surprisingly, however, axonal transport of mitochondria is unaffected in motor axons expressing expanded G4 C2 repeats. Thus, our data indicate that expanded G4 C2 repeat expression differentially impacts axonal transport of vesicular organelles and mitochondria in Drosophila models of C9orf72-associated ALS/FTD. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Hyun Sung
- Department of Neurology, School of Medicine, Johns Hopkins University, Baltimore, MD.,Solomon H. Snyder Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, MD
| | - Thomas E Lloyd
- Department of Neurology, School of Medicine, Johns Hopkins University, Baltimore, MD.,Solomon H. Snyder Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, MD
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Cunningham C, Sung H, Benoit J, Conway J, Scott S. Web-Based Knowledge Translation Tools for Parents of Children with Heart Failure: An Environmental Scan. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.1570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Shaikh M, Sung H, Lopez T, Andra R, McKean B, Jesson J, Pascal C, Pascal C, Chavez A, Schwieterman K, Oyoyo U, Kwon SR. Effect of charcoal dentifrices on tooth whitening and enamel surface roughness. Am J Dent 2021; 34:295-299. [PMID: 35051315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
PURPOSE To evaluate tooth color change and surface roughness after the use of charcoal dentifrices. METHODS Bovine teeth (n= 64) used for color measurements were stained in tea solution and embedded in acrylic resin. Specimens were randomized into four groups of 16 specimens each. Cavity Protection (Colgate-Palmolive) was the negative control. Whitening dentifrices used were Black is White (Curaden AG); and My Magic Mud (Carbon and Clay Company) containing activated charcoal and Optic White (Colgate-Palmolive) containing hydrogen peroxide. Instrumental color measurements were performed at baseline, 1-week post-brushing, 30-day post-brushing, and 1-month follow-up. Another set of bovine teeth (n= 64) used for roughness measurements were embedded in acrylic resin and the surface ground flat. The experimental groups and brushing protocol were the same as for the color evaluation part. Surface roughness was measured with a contact type profilometer at baseline and after the last brushing session. Kruskal-Wallis procedure tested changes in color and surface roughness among the different groups. All post-hoc comparisons were conducted with Bonferroni corrections. Tests of hypotheses were two-sided with an alpha level at 0.05. RESULTS Overall color change was not significantly different among groups at 1-week post-brushing and at 1-month follow-up. However, the hydrogen peroxide group had a significantly higher reduction in chroma in the yellow-blue axis when compared to negative control group at 30-day post-brushing and 1-month follow-up (P< 0.05). There was no significant difference in roughness among the groups at baseline (P= 0.2973) and post treatment (P= 0.8169). CLINICAL SIGNIFICANCE The use of charcoal dentifrices did not have the claimed whitening effect but did not increase enamel surface roughness.
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Affiliation(s)
- Mohammed Shaikh
- Center for Dental Research, Loma Linda University School of Dentistry, Loma Linda, California, USA
| | - Hyun Sung
- Center for Dental Research, Loma Linda University School of Dentistry, Loma Linda, California, USA
| | | | - Rachel Andra
- Center for Dental Research, Loma Linda University School of Dentistry, Loma Linda, California, USA
| | - Brett McKean
- Center for Dental Research, Loma Linda University School of Dentistry, Loma Linda, California, USA
| | - Jennifer Jesson
- Adventist Health, Feather River Dental, Paradise, California, USA
| | - Claudie Pascal
- Division of General Dentistry, Loma Linda University School of Dentistry, Loma Linda, California, USA
| | - Claudie Pascal
- Division of General Dentistry, Loma Linda University School of Dentistry, Loma Linda, California, USA
| | - Anna Chavez
- Division of General Dentistry, Loma Linda University School of Dentistry, Loma Linda, California, USA
| | | | - Udochukwu Oyoyo
- Dental Education Services, Loma Linda University School of Dentistry, Loma Linda, California, USA
| | - So Ran Kwon
- Student Research Program, Division of General Dentistry, Loma Linda University School of Dentistry, Loma Linda, California, USA,
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Jung J, Lim SY, Lee J, Bae S, Lim YJ, Hong MJ, Kwak SH, Kim EO, Sung H, Kim MN, Bae JY, Park MS, Kim SH. Clustering and multiple-spreading events of nosocomial severe acute respiratory syndrome coronavirus 2 infection. J Hosp Infect 2021; 117:28-36. [PMID: 34453983 PMCID: PMC8384763 DOI: 10.1016/j.jhin.2021.06.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 06/06/2021] [Accepted: 06/07/2021] [Indexed: 11/04/2022]
Abstract
Background There is growing evidence that super-spreading events (SSEs) and multiple-spreading events (MSEs) are a characteristic feature of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. However, data regarding the possibility of SSEs or MSEs in healthcare settings are limited. Methods This study was performed at a tertiary-care hospital in Korea. We analysed the nosocomial COVID-19 cases that occurred in healthcare workers and inpatients and their caregivers between January and 20th December 2020. Cases with two to four secondary cases were defined as MSEs and those with five or more secondary cases as SSEs. Findings We identified 21 nosocomial events (single-case events, N = 12 (57%); MSE + SSE, N = 9 (43%)) involving 65 individuals with COVID-19. Of these 65 individuals, 21 (32%) were infectors. The infectors tended to have a longer duration between symptom onset and diagnostic confirmation than did the non-infectors (median two days vs zero days, P=0.08). Importantly, 12 (18%) individuals were responsible for MSEs and one (2%) for an SSE, which collectively generated 35 (54%) secondary cases. Conclusion In a hospital with thorough infection-control measures, approximately 70% of the nosocomial cases of COVID-19 did not generate secondary cases, and one-fifth of the infectors were responsible for SSEs and MSEs, which accounted for approximately half of the total cases. Early case identification, isolation, and extensive contact tracing are important for the prevention of transmission and SSEs.
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Affiliation(s)
- J Jung
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea; Office for Infection Control, Asan Medical Center, Seoul, Republic of Korea
| | - S Y Lim
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - J Lee
- Department of Microbiology, Institute for Viral Diseases, Biosafety Center, College of Medicine, Korea University, Seoul, Republic of Korea
| | - S Bae
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Y-J Lim
- Office for Infection Control, Asan Medical Center, Seoul, Republic of Korea
| | - M J Hong
- Office for Infection Control, Asan Medical Center, Seoul, Republic of Korea
| | - S H Kwak
- Office for Infection Control, Asan Medical Center, Seoul, Republic of Korea
| | - E O Kim
- Office for Infection Control, Asan Medical Center, Seoul, Republic of Korea
| | - H Sung
- Department of Laboratory Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - M-N Kim
- Department of Laboratory Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - J-Y Bae
- Department of Microbiology, Institute for Viral Diseases, Biosafety Center, College of Medicine, Korea University, Seoul, Republic of Korea
| | - M-S Park
- Department of Microbiology, Institute for Viral Diseases, Biosafety Center, College of Medicine, Korea University, Seoul, Republic of Korea.
| | - S-H Kim
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea; Office for Infection Control, Asan Medical Center, Seoul, Republic of Korea.
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Cunningham KM, Maulding K, Ruan K, Senturk M, Grima JC, Sung H, Zuo Z, Song H, Gao J, Dubey S, Rothstein JD, Zhang K, Bellen HJ, Lloyd TE. TFEB/Mitf links impaired nuclear import to autophagolysosomal dysfunction in C9-ALS. eLife 2020; 9:59419. [PMID: 33300868 PMCID: PMC7758070 DOI: 10.7554/elife.59419] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [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: 05/28/2020] [Accepted: 12/09/2020] [Indexed: 12/13/2022] Open
Abstract
Disrupted nucleocytoplasmic transport (NCT) has been implicated in neurodegenerative disease pathogenesis; however, the mechanisms by which disrupted NCT causes neurodegeneration remain unclear. In a Drosophila screen, we identified ref(2)P/p62, a key regulator of autophagy, as a potent suppressor of neurodegeneration caused by the GGGGCC hexanucleotide repeat expansion (G4C2 HRE) in C9orf72 that causes amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). We found that p62 is increased and forms ubiquitinated aggregates due to decreased autophagic cargo degradation. Immunofluorescence and electron microscopy of Drosophila tissues demonstrate an accumulation of lysosome-like organelles that precedes neurodegeneration. These phenotypes are partially caused by cytoplasmic mislocalization of Mitf/TFEB, a key transcriptional regulator of autophagolysosomal function. Additionally, TFEB is mislocalized and downregulated in human cells expressing GGGGCC repeats and in C9-ALS patient motor cortex. Our data suggest that the C9orf72-HRE impairs Mitf/TFEB nuclear import, thereby disrupting autophagy and exacerbating proteostasis defects in C9-ALS/FTD.
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Affiliation(s)
- Kathleen M Cunningham
- Cellular and Molecular Medicine Program, School of Medicine, Johns Hopkins University, Baltimore, United States
| | - Kirstin Maulding
- Cellular and Molecular Medicine Program, School of Medicine, Johns Hopkins University, Baltimore, United States
| | - Kai Ruan
- Department of Neurology, School of Medicine, Johns Hopkins University, Baltimore, United States
| | - Mumine Senturk
- Program in Developmental Biology, Baylor College of Medicine (BCM), Houston, United States
| | - Jonathan C Grima
- Brain Science Institute, School of Medicine, Johns Hopkins University, Baltimore, United States.,Solomon H. Snyder Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, United States
| | - Hyun Sung
- Department of Neurology, School of Medicine, Johns Hopkins University, Baltimore, United States
| | - Zhongyuan Zuo
- Department of Molecular and Human Genetics, BCM, Houston, United States
| | - Helen Song
- Department of Neurology, School of Medicine, Johns Hopkins University, Baltimore, United States
| | - Junli Gao
- Department of Neuroscience, Mayo Clinic, Jacksonville, United States
| | - Sandeep Dubey
- Department of Neurology, School of Medicine, Johns Hopkins University, Baltimore, United States
| | - Jeffrey D Rothstein
- Cellular and Molecular Medicine Program, School of Medicine, Johns Hopkins University, Baltimore, United States.,Department of Neurology, School of Medicine, Johns Hopkins University, Baltimore, United States.,Brain Science Institute, School of Medicine, Johns Hopkins University, Baltimore, United States.,Solomon H. Snyder Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, United States
| | - Ke Zhang
- Department of Neuroscience, Mayo Clinic, Jacksonville, United States
| | - Hugo J Bellen
- Program in Developmental Biology, Baylor College of Medicine (BCM), Houston, United States.,Department of Molecular and Human Genetics, BCM, Houston, United States.,Department of Neuroscience, BCM, Houston, United States.,Jan and Dan Duncan Neurological Research Institute, Texas Children's Hospital, Houston, United States.,Howard Hughes Medical Institute, Houston, United States
| | - Thomas E Lloyd
- Cellular and Molecular Medicine Program, School of Medicine, Johns Hopkins University, Baltimore, United States.,Department of Neurology, School of Medicine, Johns Hopkins University, Baltimore, United States.,Solomon H. Snyder Department of Neuroscience, School of Medicine, Johns Hopkins University, Baltimore, United States
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Jung J, Choi HS, Lee JY, Ryu S, Kim SK, Hong M, Kwak S, Kim H, Lee MS, Sung H, Kim MN, Kim SH. Outbreak of carbapenemase-producing Enterobacteriaceae associated with a contaminated water dispenser and sink drains in the cardiology units of a Korean hospital. J Hosp Infect 2020; 104:476-483. [DOI: 10.1016/j.jhin.2019.11.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 11/12/2019] [Accepted: 11/21/2019] [Indexed: 12/19/2022]
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9
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Herzog C, Best D, Dolan J, Donnelly L, Patel M, Sung H. Demographic Analysis of the Current Oral and Maxillofacial Surgery Applicant/Resident Cohorts. J Oral Maxillofac Surg 2019. [DOI: 10.1016/j.joms.2019.06.131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Yang XR, Abubakar M, Guo C, Koka H, Sung H, Guida J, Deng J, Zhou B, Hu N, Lu N. Abstract P1-09-12: TP53 expression in relation to clinical and etiologic factors in breast cancer subtypes. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p1-09-12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
TP53 is a well-known tumor suppressor gene and mutations in TP53 are the most frequent genomic event in most cancers including breast cancer. Recent studies have shown that the frequency, spectrum, timing, and clinical implications of TP53 mutations varied in different molecular subtypes of breast cancer. For example, the frequency of TP53 mutations is the highest in basal-like subtype and lowest in luminal A tumors. However, the evaluation of TP53 protein expression, as a surrogate for TP53 mutations, in large studies in the context of tumor subtypes is limited. In addition, the etiologic relevance of TP53 expression is yet to be investigated. The goal of this study is to evaluate the association of clinical and breast cancer risk factors with TP53 expression, measured using immunohistochemistry (IHC), in breast cancer molecular subtypes. The analysis included 7,226 women with invasive breast cancer who were diagnosed and treated in a tertiary hospital in Beijing, China. Subtypes were defined as Luminal A: ER+ and PR+, HER2–, and low grade (grades 1 or 2); luminal B/HER2–: ER+ and/or PR+, HER2–, and high grade (grade 3); luminal B/HER2+: ER+ and/or PR+, HER2+ (regardless of grade); HER2-enriched: ER–, PR–, and HER2+; Triple-negative (TN): ER–, PR–, and HER2–. As expected, positive TP53 staining showed the lowest frequency in the luminal A (46%) and highest in the TN (61%) and HER2-enriched (63%) subtypes (P-value <0.001). Overall and particularly in luminal A patients, positive TP53 staining was associated with higher frequencies of aggressive tumor features such as higher grade, larger tumor size, higher proliferative index, and EGFR expression. Compared with TP53– patients, TP53+ patients were more likely to have younger ages at onset and increased parity, but these associations were largely driven by the luminal A subtype [OR (95% CI) vs nulliparity = 2.67 (1.59, 4.51); 2.63 (1.52, 4.55); 3.68 (2.01, 6.72) for 1, 2, and ≥3 children, respectively (P-trend = 0.006)]. Luminal A/TP53+ patients were also more likely to have breastfed [OR (95% CI) ever vs never = 1.38 (1.03, 1.85)] than luminal A/TP53– patients. These findings suggest that TP53 IHC staining might be used to further refine the classification of luminal A breast cancer into subgroups with distinct clinical and etiologic relevance.
Citation Format: Yang XR, Abubakar M, Guo C, Koka H, Sung H, Guida J, Deng J, Zhou B, Hu N, Lu N. TP53 expression in relation to clinical and etiologic factors in breast cancer subtypes [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P1-09-12.
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Affiliation(s)
- XR Yang
- National Cancer Institute, NIH/DHHS, Bethesda, MD; Cancer Hospital, Chinese Academy of Medical Sciences, Beijing, China; American Cancer Society, Atlanta
| | - M Abubakar
- National Cancer Institute, NIH/DHHS, Bethesda, MD; Cancer Hospital, Chinese Academy of Medical Sciences, Beijing, China; American Cancer Society, Atlanta
| | - C Guo
- National Cancer Institute, NIH/DHHS, Bethesda, MD; Cancer Hospital, Chinese Academy of Medical Sciences, Beijing, China; American Cancer Society, Atlanta
| | - H Koka
- National Cancer Institute, NIH/DHHS, Bethesda, MD; Cancer Hospital, Chinese Academy of Medical Sciences, Beijing, China; American Cancer Society, Atlanta
| | - H Sung
- National Cancer Institute, NIH/DHHS, Bethesda, MD; Cancer Hospital, Chinese Academy of Medical Sciences, Beijing, China; American Cancer Society, Atlanta
| | - J Guida
- National Cancer Institute, NIH/DHHS, Bethesda, MD; Cancer Hospital, Chinese Academy of Medical Sciences, Beijing, China; American Cancer Society, Atlanta
| | - J Deng
- National Cancer Institute, NIH/DHHS, Bethesda, MD; Cancer Hospital, Chinese Academy of Medical Sciences, Beijing, China; American Cancer Society, Atlanta
| | - B Zhou
- National Cancer Institute, NIH/DHHS, Bethesda, MD; Cancer Hospital, Chinese Academy of Medical Sciences, Beijing, China; American Cancer Society, Atlanta
| | - N Hu
- National Cancer Institute, NIH/DHHS, Bethesda, MD; Cancer Hospital, Chinese Academy of Medical Sciences, Beijing, China; American Cancer Society, Atlanta
| | - N Lu
- National Cancer Institute, NIH/DHHS, Bethesda, MD; Cancer Hospital, Chinese Academy of Medical Sciences, Beijing, China; American Cancer Society, Atlanta
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Monetti C, Liang Q, Shutova M, Neely E, Hacibekiroglu S, Yang H, Kim C, Zhang P, Mileikovsky M, Sung H, Nagy A. A solution for cell therapy safety. Cytotherapy 2018. [DOI: 10.1016/j.jcyt.2018.02.276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Abstract
In this study, an epoxy-fixed porcine pericardia I patch with or without ionically bound heparin was evaluated in a canine model as an alternative to the glutaraldehyde-fixed biological patch for clinical applications. To evaluate the effectiveness of this epoxy-fixed patch, a composite membrane composed of: an epoxy-fixed porcine patch with ionically bound heparin; a glutaraldehyde-fixed porcine patch with ionically bound heparin; an ePTFE polymeric patch; a polyester polymeric patch; an epoxy-fixed porcine patch without ionically bound heparin; and a glutaraldehyde-fixed porcine patch without ionically bound heparin was made. This membrane was assessed orthopically in a canine model. The early results (1-4 weeks post implant) revealed that the biological patches with ionically bound heparin had the mildest tissue reactions (inflammatory reaction, fibrosis, and adhesion) among all the test samples. However, by 12 weeks postoperatively, all the test samples had mild to severe tissue reactions. The order of tissue reactions with increasing severity was: the biological patches with ionically bound heparin, the biological patches without ionically bound heparin, and the polymeric patches. The results suggest that heparin may be used to reduce adhesion. Additionally, the epoxy-fixed tissue caused a relatively lower degree of inflammatory reaction than the glutaraldehyde-fixed tissue.
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Affiliation(s)
- Y. Chang
- Division of Cardiovascular Surgery, National Central University, Chung-Li, Taiwan
| | - H. Sung
- Department of Chemical Engineering, National Central University, Chung-Li, Taiwan
| | - Y. Chiu
- Department of Pathobiology, Pig Research Institute, Chu-Nan, Taiwan
| | - J. Lu
- Pediatric Cardiology, Veterans General Hospital, Taipiei, Taiwan - Republic of China
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Song PH, Min JH, Kim YS, Jo SY, Kim EJ, Lee KJ, Lee J, Sung H, Moon JS, Whang DH. Rapid and accurate diagnosis of Clostridium difficile infection by real-time polymerase chain reaction. Intest Res 2018; 16:109-115. [PMID: 29422805 PMCID: PMC5797257 DOI: 10.5217/ir.2018.16.1.109] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [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: 01/24/2017] [Revised: 03/28/2017] [Accepted: 04/01/2017] [Indexed: 12/28/2022] Open
Abstract
Background/Aims The incidence and severity of Clostridium difficile infection (CDI) have increased worldwide, resulting in a need for rapid and accurate diagnostic methods. Methods A retrospective study was conducted to compare CDI diagnosis methods between January 2014 and December 2014. The stool samples, which were obtained in presumptive CDI patients, were compared for their diagnostic accuracy and rapidity, including real-time polymerase chain reaction (PCR) of toxin genes, C. difficile toxin assay, and culture for C. difficile. Results A total of 207 cases from 116 patients were enrolled in this study and 117 cases (56.5%) were diagnosed as having CDI. Among the 117 cases, the sensitivities of real-time PCR, C. difficile toxin assay, and culture for C. difficile were 87.2% (102 cases; 95% CI, 80.7%–92.8%), 48.7% (57 cases; 95% CI, 41.0%–59.8%), and 65.0% (76 cases; 95% CI, 60.2%–78.5%), respectively (P<0.005). Notably, 34 cases (29.0%) were diagnosed with CDI by real-time PCR only. The time required to obtain results was 2.27 hours (136.62±82.51 minutes) for real-time PCR, 83.67 hours (5,020.66±3,816.38 minutes) for toxin assay, and 105.79 hours (6,347.68±3,331.46 minutes) for culture (P<0.005), respectively. Conclusions We confirmed that real-time PCR of toxin genes is the most effective diagnostic method for accurate and early diagnosis of CDI. It also helps to diagnose hypervirulent CDI, such as ribotype 027 infection.
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Affiliation(s)
- Pil Hun Song
- Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - Jung Hwa Min
- Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - You Sun Kim
- Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - Soo Yeon Jo
- Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - Eun Jin Kim
- Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - Kyung Jin Lee
- Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - Jeonghun Lee
- Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - Hyun Sung
- Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - Jeong Seop Moon
- Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - Dong Hee Whang
- Department of Laboratory Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
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Kim T, Jin CE, Sung H, Koo B, Park J, Kim SM, Kim JY, Chong YP, Lee SO, Choi SH, Kim YS, Woo JH, Lee JH, Lee JH, Lee KH, Shin Y, Kim SH. Molecular epidemiology and environmental contamination during an outbreak of parainfluenza virus 3 in a haematology ward. J Hosp Infect 2017; 97:403-413. [PMID: 28893615 PMCID: PMC7114920 DOI: 10.1016/j.jhin.2017.09.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Accepted: 09/05/2017] [Indexed: 11/25/2022]
Abstract
Background Although fomites or contaminated surfaces have been considered as transmission routes, the role of environmental contamination by human parainfluenza virus type 3 (hPIV-3) in healthcare settings is not established. Aim To describe an hPIV-3 nosocomial outbreak and the results of environmental sampling to elucidate the source of nosocomial transmission and the role of environmental contamination. Methods During an hPIV-3 outbreak between May and June 2016, environmental surfaces in contact with clustered patients were swabbed and respiratory specimens used from infected patients and epidemiologically unlinked controls. The epidemiologic relatedness of hPIV-3 strains was investigated by sequencing of the haemagglutinin–neuraminidase and fusion protein genes. Findings Of 19 hPIV-3-infected patients, eight were haematopoietic stem cell recipients and one was a healthcare worker. In addition, four had upper and 12 had lower respiratory tract infections. Of the 19 patients, six (32%) were community-onset infections (symptom onset within <7 days of hospitalization) and 13 (68%) were hospital-onset infections (≥7 days of hospitalization). Phylogenetic analysis identified two major clusters: five patients, and three patients plus one healthcare worker. Therefore, seven (37%) were classified as nosocomial transmissions. hPIV-3 was detected in 21 (43%) of 49 environmental swabs up to 12 days after negative respiratory polymerase chain reaction conversion. Conclusion At least one-third of a peak season nosocomial hPIV-3 outbreak originated from nosocomial transmission, with multiple importations of hPIV-3 from the community, providing experimental evidence for extensive environmental hPIV-3 contamination. Direct contact with the contaminated surfaces and fomites or indirect transmission from infected healthcare workers could be responsible for nosocomial transmission.
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Affiliation(s)
- T Kim
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea; Division of Infectious Diseases, Department of Internal Medicine, Gyeongsang National University Hospital, Republic of Korea
| | - C E Jin
- Department of Convergence Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - H Sung
- Department of Laboratory Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - B Koo
- Department of Convergence Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - J Park
- Department of Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - S-M Kim
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - J Y Kim
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Y P Chong
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - S-O Lee
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - S-H Choi
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Y S Kim
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - J H Woo
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - J-H Lee
- Department of Hematology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - J-H Lee
- Department of Hematology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - K-H Lee
- Department of Hematology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Y Shin
- Department of Convergence Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea.
| | - S-H Kim
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea.
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Abstract
Several studies have reported a significant rate of missed colorectal polyps during colonoscopy. This study aimed to determine the variables that affect the miss rate of colorectal polyps.We performed a retrospective observational study of patients who, between January 2007 and December 2014, had undergone a second colonoscopy within 6 months of their first. In all patients, the first colonoscopy constituted a screening or surveillance colonoscopy as part of a health check-up, and the patients were referred to the endoscopic clinic if there were meaningful polyps. The miss rate of colorectal polyps was evaluated, as were the variables related to these missed lesions.Among 659 patients (535 men), the miss rate of colorectal polyps was 17.24% (372/2158 polyps), and 38.69% of patients (255/659 patients) had at least 1 missed polyp. The most common site for missed polyps was the ascending colon (29.8%), followed by the sigmoid colon (27.8%). The miss rate of polyps was higher in men [odds ratio (OR) = 1.611, 95% confidence interval (95% CI) = 1.024-2.536], patients with multiple polyps at their first colonoscopy (OR = 1.463, 95% CI = 0.992-2.157), and patients who had a history of polyps (OR = 23.783, 95% CI = 3.079-183.694). Multiple missed polyps were more frequently located in the right colon (OR = 2.605, 95% CI = 1.458-4.657), and the risk of sessile serrated adenoma/polyp was greater in the right colon (OR = 10.418, 95% CI = 2.073-52.353).Endoscopists should pay careful attention in patients who have multiple polyps and in those who have a history of polyps, because such patients are at a high risk of missed polyps in colonoscopy.
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Affiliation(s)
- Jeonghun Lee
- Division of Gastroenterology, Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul
- Department of Internal Medicine, Ace Hospital, Ansan, Korea
| | - Sung Won Park
- Division of Gastroenterology, Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul
| | - You Sun Kim
- Division of Gastroenterology, Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul
| | - Kyung Jin Lee
- Division of Gastroenterology, Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul
| | - Hyun Sung
- Division of Gastroenterology, Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul
| | - Pil Hun Song
- Division of Gastroenterology, Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul
| | - Won Jae Yoon
- Division of Gastroenterology, Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul
| | - Jeong Seop Moon
- Division of Gastroenterology, Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul
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Ee C, Thuraisingam S, Pirotta M, French S, Xue C, Teede H, Kristoffersen AE, Sirois F, Stub T, Engler J, Joos S, Güthlin C, Felenda J, Beckmann C, Stintzing F, Evans R, Bronfort G, Keefe D, Taberko A, Hanson L, Haley A, Ma H, Jolton J, Yarosh L, Keefe F, Nam J, Evans R, Ojala L, Kreitzer MJ, Hanson L, Fink C, Kraft K, Flower A, Lewith G, Harman K, Stuart B, Bishop FL, Frawley J, Füleki L, Kiss E, Vancsik T, Krenacs T, Funabashi M, Pohlman KA, Mior S, Thiel H, Hill MD, Cassidy DJ, Westaway M, Yager J, Hurwitz E, Kawchuk GN, O’Beirne M, Vohra S, Gaboury I, Morin C, Gaertner K, Torchetti L, Frei-Erb M, Kundi M, Frass M, Gallo E, Maggini V, Comite M, Sofi F, Baccetti S, Vannacci A, Di Stefano M, Monechi MV, Gori L, Rossi E, Firenzuoli F, Mediati RD, Ballerini G, Gardiner P, Lestoquoy AS, Negash L, Stillman S, Shah P, Liebschutz J, Adelstein P, Farrell-Riley C, Brackup I, Penti B, Saper R, Sampedro IG, Carvajal G, Gleiss A, Gross MM, Brendlin D, Röttger J, Stritter W, Seifert G, Grzanna N, Stange R, Guendling PW, Gu W, Lu Y, Wang J, Zhang C, Hajimonfarednejad M, Hannan N, Hellsing R, Wode K, Nordberg JH, Nordberg JH, Andermo S, Arman M, von Hörsten I, Torrielo PV, Bai H, Vilaró CLA, Cabrera FC, Huber R, Hui H, Ziea E, Tsui D, Hsieh J, Lam C, Chan E, Jensen MP, He Y, Battalio SL, Chan J, Edwards KA, Gertz KJ, Day MA, Sherlin LH, Ehde DM, Kim KH, Jang S, Jang BH, Zhang X, Go HY, Park S, Ko SG, Kraft K, Janik H, Börner A, Lee J, Lee B, Chang GT, Menassa A, Zhang Z, Motoo Y, Müller J, Rabini S, Vinson B, Kelber O, Storr M, Kraft K, Niemeijer M, Baars E, Hoekman J, Wang D, Ruijssenaaars W, Njoku FC, Klose P, Brinkhaus B, Michalsen A, Dobos G, Cramer H, Norheim AJ, Alræk T, Okumus F, Meng F, Oncu-Celik H, Hagel A, Albrecht H, Vollbracht C, Dauth W, Hagel W, Vitali F, Ganzleben I, Schultis H, Konturek P, Stein J, Neurath M, Raithel M, Hagel A, Vollbracht C, Raithel M, Konturek P, Krick B, Haller H, Klose P, Dobos G, Kümmel S, Cramer H, Haller H, Saha FJ, Kowoll A, Ebner B, Berger B, Dobos G, Choi KE, He L, Wang H, He X, Gu C, Zhang Y, Zhao L, Tong X, He L, Wang H, He X, Gu C, Zhang Y, Zhao L, Tong X, He L, Wang H, He X, Gu C, Zhang Y, Zhao L, Tong X, Ho RST, Chung VCH, Wu X, Wong CHL, Wu JCY, Wong SYS, Lau AYL, Sit RWS, Wong W, Holmes M, Bishop F, Calman L, Holmes M, Bishop F, Lewith G, Newell D, Field J, Htut WL, Han D, Choi DI, Choi SJ, Kim HY, Hwang JH, Huang CW, Jang BH, Chen FP, Ko SG, Huang W, Jin D, Lian F, Jang S, Kim KH, Lee EK, Sun SH, Go HY, Ko Y, Park S, Jang BH, Shin YC, Ko SG, Janik H, Greiffenhagen N, Bolte J, Kraft K, Jaworski M, Adamus M, Dobrzynska A, Jeitler M, Jaspers J, von Scheidt C, Koch B, Michalsen A, Steckhan N, Kessler C, Jin D, Huang WJ, Pang B, Lian FM, Jong M, Baars E, Glockmann A, Hamre H, Kainuma M, Murakami A, Kubota T, Kobayashi D, Sumoto Y, Furusyo N, Ando SI, Shimazoe T, Kelber O, Verjee S, Gorgus E, Schrenk D, Kemper K, Hill E, Kemper K, Rao N, Gascon G, Mahan J, Kienle G, Dietrich J, Schmoor C, Huber R, Kim WH, Han D, Ahmed M, He L, Hwang JH, Kiss E, Vancsik T, Meggyeshazi N, Kovago C, Krenacs T, Klaus AK, Zerm R, Pranga D, Ostermann T, Reif M, von Laue HB, Brinkhaus B, Kröz M, Klaus AK, Zerm R, Pranga D, Recchia DR, Ostermann T, Reif M, von Laue HB, Brinkhaus B, Kröz M, Klein-Laansma CT, Jong M, von Hagens C, Jansen JP, van Wietmarschen H, Jong MC, Ko Y, Sun SH, Go HY, Jeon CY, Song YK, Ko SG, Koch AK, Rabsilber S, Lauche R, Kümmel S, Dobos G, Langhorst J, Cramer H, Koch AK, Trifunovic-Koenig M, Klose P, Cramer H, Dobos G, Langhorst J, Koster E, Baars E, Delnoij D, Kroll L, Weiss K, Kubo A, Hendlish S, Altschuler A, Connolly N, Avins A, Lauche R, Recchia DR, Cramer H, Wardle J, Lee D, Sibbritt D, Adams J, Ostermann T, Lauche R, Sibbritt D, Park C, Mishra G, Adams J, Cramer H, Lechner J, Lee I, Chae Y, Lee J, Cho SH, Choi Y, Lee JY, Ryu HS, Yoon SS, Oh HK, Hyun LK, Kim JO, Yoon SW, Lee JY, Shin SH, Jang M, Müller I, Park SHJ, Lestoquoy AS, Laird L, Negash L, Mitchell S, Gardiner P, Li X, Wang Y, Zhen J, Yu H, Liu T, Gu X, Liu H, Ma W, Zhang C, Shang X, Bai Y, Meng F, Liu W, Rooney C, Smith A, Lopes S, Demarzo M, do Patrocínio Nunes M, Lorenz P, Gründemann C, Heinrich M, Garcia-Käufer M, Grunewald F, Messerschmidt S, Herrick A, Gruber K, Beckmann C, Knödler M, Huber R, Steinborn C, Stintzing F, Lu T, Wang L, Wu D, Luberto CM, Hall DL, Chad-Friedman E, Lechner S, Park ER, Luberto CM, Park E, Goodman J, Luer S, Heri M, von Ammon K, Frei-Erb M, Ma W, Meng F, Maggini V, Gallo E, Landini I, Lapucci A, Nobili S, Mini E, Firenzuoli F, McDermott C, Lewith G, Richards S, Cox D, Frossell S, Leydon G, Eyles C, Raphael H, Rogers R, Selby M, Adler C, Allam J, Meng F, Gu W, Zhang C, Bai H, Zhang Z, Wang D, Bu X, Zhang H, Zhang J, Liu H, Mikolasek M, Berg J, Witt C, Barth J, Miskulin I, Lalic Z, Miskulin M, Dumic A, Sebo D, Vcev A, Mohammed NAA, Han D, Ahmed M, Choi SJ, Im HB, Hwang JH, Mukherjee A, Kandhare A, Bodhankar S, Mukherjee A, Kandhare A, Thakurdesai P, Bodhankar S, Munk N, Evans E, Froman A, Kline M, Bair MJ, Musial F, Kristoffersen AE, Alræk T, Hamre HJ, Stub T, Björkman L, Fønnebø VM, Pang B, Lian FM, Ni Q, Tong XL, Li XL, Liu WK, Feng S, Zhao XY, Zheng YJ, Zhao XM, Lin YQ, Pang B, Lian FM, Tong XL, Zhao TY, Zhao XY, Phd HC, Zhang C, Pang B, Liu F, Tong XL, Zhao LH, Zhao XM, Ye R, Gu CJ, Pang B, Ni Q, Tong XL, Lian FM, Zhao XY, Jin D, Zhao XM, Zheng YJ, Lin YQ, Peng W, Lauche R, Sibbritt D, Adams J, Peng W, Wardle J, Cramer H, Mishra G, Lauche R, Pohlman KA, Mior S, Funabashi M, De Carvalho D, El-Bayoumi M, Haig B, Kelly K, Wade DJ, O’Beirne M, Vohra S, Portalupi E, Gobo G, Bellavita L, Guglielmetti C, Raak C, Teuber M, Molsberger F, von Rath U, Reichelt U, Schwanebeck U, Zeil S, Vogelberg C, Veintimilla DR, Vollbracht C, Mery GT, Villavicencio MM, Moran SH, Sachse C, Gündlin PW, Stange R, Sahebkarkhorasani M, Azizi H, Schumann D, Lauche R, Sundberg T, Leach MJ, Cramer H, Seca S, Greten H, Selliah S, Shakya A, Han D, Kim HY, Choi DI, Im HB, Choi SJ, Sherbakova A, Ulrich-Merzenich G, Kelber O, Abdel-Aziz H, Sibinga E, Webb L, Ellen J, Skrautvol K, Nåden D, Song R, Grabowska W, Osypiuk K, Diaz GV, Bonato P, Park M, Hausdorff J, Fox M, Sudarsky LR, Tarsy D, Novakowski J, Macklin EA, Wayne PM, Song R, Hwang I, Ahn S, Lee MA, Wayne PM, Sohn MK, Sorokin O, Steckhan N, Heydeck D, Borchert A, Hohmann CD, Kühn H, Michalsen A, Kessler C, Steckhan N, Hohmann CD, Cramer H, Michalsen A, Dobos G, von Scheidt C, Kirschbaum C, Stalder T, Stöckigt B, Teut M, Suhr R, Sulmann D, Brinkhaus B, Streeter C, Gerbarg P, Silveri M, Brown R, Jensen J, Stritter W, Rutert B, Eggert A, Längler A, Seifert G, Holmberg C, Sun J, Deng X, Li WY, Wen B, Robinson N, Liu JP, Sung HK, Yang N, Go HY, Shin SM, Jung H, Kim YJ, Jung WS, Park TY, Suzuki K, Ito T, Uchida S, Kamohara S, Ono N, Takamura M, Yokochi A, Maruyama K, Tapia P, Thabaut K, Brinkhaus B, Stöckigt B, Thronicke A, Kröz M, Steele M, Matthes H, Herbstreit C, Schad F, Tian J, Lian F, Yang L, Tong X, Tian T, Zhang H, Tian X, Wang C, Chai QY, Zhang L, Xia R, Huang N, Fei Y, Liu J, Trent N, Miraglia M, Dusek J, Pasalis E, Khalsa SB, Trifunovic-König M, Klose P, Cramer H, Lauche R, Koch A, Dobos G, Langhorst J, Uebelacker L, Tremont G, Gillette L, Epstein-Lubow G, Strong D, Abrantes A, Tyrka A, Tran T, Gaudiano B, Miller I, Ullmann G, Ullmann G, Li Y, Vaidya S, Marathe V, Vale AC, Motta J, Donadão F, Valente AC, Valente LCC, Ghelman R, Vesovic D, Jevdic D, Jevdic A, Jevdic K, Djacic M, Letic D, Bozic D, Markovic M, Dunjic S, Vesovic D, Jevdic D, Jevdic A, Jevdic K, Djacic M, Letic D, Bozic D, Markovic M, Ruscuklic G, Baksa D, Dunjic S, Vesovic D, Jevdic D, Jevdic A, Jevdic K, Djacic M, Letic D, Bozic D, Markovic M, Ruscuklic G, Baksa D, Dunjic S, Vesovic D, Jevdic D, Jevdic A, Jevdic K, Djacic M, Letic D, Bozic D, Markovic M, Ruscuklic G, Baksa D, Dunjic S, Vesovic D, Jevdic D, Jevdic A, Jevdic K, Djacic M, Letic D, Bozic D, Markovic M, Vrca K, Dunjic S, Vincent A, Wahner-Roedler D, Whipple M, Vogelius MM, Vollbracht C, Friesecke I, Gündling PW, Wahner-Roedler D, Mahapatra S, Hynes R, Van Rooy K, Looker S, Ghosh A, Bauer B, Cutshall S, Walach H, Flores AB, Walach H, Ofner M, Kastner A, Schwarzl G, Schwameder H, Alexander N, Strutzenberger G, Wang J, Lu Y, Gu W, Zhang C, Bu X, Zhang H, Zhang J, He Y, Zhang X, Meng F, Wang S, Yu H, Shi J, Hao Y, Liu T, Wu J, Qiu Z, Gu X, Wang YH, Lou CJ, Watts S, Wayne P, Osypiuk K, Vergara-Diaz G, Bonato P, Gow B, Hausdorff J, Miranda J, Sudarsky L, Tarsy D, Fox M, Macklin E, Wode K, Bergqvist J, Bernhardsson BM, Nordberg JH, Kienle G, Sharp L, Henriksson R, Woo Y, Hyun MK, Wu H, Wang TF, Zhao Y, Wei Y, Tian L, He L, Wang X, Wu R, Feng S, Han M, Caldwell PHY, Liu S, Zhang J, Liu J, Xia R, Chai Q, Fei Y, Guo Z, Wang C, Liu Z, Li X, Zhang Y, Liu J, Yang IJ, Lincha VR, Ahn SH, Lee DU, Shin HM, Yang L, Sibbritt D, Peng W, Adams J, Yang N, Sung H, Shin SM, Go HY, Jung H, Kim Y, Park TY, Yap A, Kwan YH, Tan CS, Ibrahim S, Ang SB, Yayi A, Han D, Im HB, Hwang JH, Choi SJ, Yoo JE, Yoo HR, Jang SB, Lee HL, Youssef A, Ezzat S, Motaal AA, El-Askary H, Yu X, Cui Y, Zhang Y, Lian F, Yun Y, Ko Y, Ahn JH, Jang BH, Kim KS, Ko SG, Choi I, Zerm R, Glinz A, Pranga D, Berger B, ten Brink F, Reif M, Büssing A, Gutenbrunner C, Kröz M, Zerm R, Helbrecht B, Pranga D, Brinkhaus B, Michalsen A, Kröz M, Zhang H, Fang T, Wang J, Zhang C, He Y, Zhang X, Zhang Z, Wang D, Meng F, Zhang J, Zhang C, Bai H, Shen Z, Ma W, Liu H, Bai Y, Shang X, Meng F, Zhang R, Wu F, Li M, Xuan X, Shen X, Ren K, Berman B, Zhen J, Li X, Gu X, Yu H, Zheng Z, Wan Y, Wang Y, Ma X, Dong F, Liu T, Zhen J, Li X, Gu X, Yu H, Zheng Z, Wan Y, Wang Y, Ma X, Dong F, Liu T, Zick S, Harris R, Bae GE, Kwon JN, Lee HY, Nam JK, Lee SD, Lee DH, Han JY, Yun YJ, Lee JH, Park HL, Park SH, Bocci C, Ivaldi GB, Vietti I, Meaglia I, Guffi M, Ruggiero R, Gualea M, Longa E, Bonucci M, Croke S, Rodriguez LD, Caracuel-Martínez JC, Fajardo-Rodríguez MF, Ariza-García A, la Fuente FGD, Arroyo-Morales M, Estrems MS, Gómez VG, Estrems MS, Sabater MV, Ferreri R, Bernardini S, Pulcri R, Cracolici F, Rinaldi M, Porciani C, Firenzuoli F, Baccetti S, Di Stefano M, Monechi MV, Gallo E, Maggini V, Gori L, Rossi E, Fisher P, Hughes J, Mendoza A, MacPherson H, Witt C, Filshie J, Lewith G, Di Francesco A, Bernardini A, Messe M, Primitivo V, Iasella PA, Ghelman R, Taminato M, Alcantara JDC, De Oliveira KR, Rodrigues DCDA, Mumme JRC, Sunakozawa OKM, Filho VO, Seifert G, Goldenberg J, Day A, Sasagawa M, Ward L, Cooley K, Gunnarsdottir T, Hjaltadottir I. World Congress Integrative Medicine & Health 2017: part two. BMC Complement Altern Med 2017. [PMCID: PMC5498867 DOI: 10.1186/s12906-017-1783-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Kim T, Kim ES, Park SY, Sung H, Kim MN, Kim SH, Lee SO, Choi SH, Jeong JY, Woo JH, Chong YP, Kim YS. Phenotypic changes of methicillin-resistant Staphylococcus aureus during vancomycin therapy for persistent bacteraemia and related clinical outcome. Eur J Clin Microbiol Infect Dis 2017; 36:1473-1481. [PMID: 28337607 DOI: 10.1007/s10096-017-2956-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [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: 12/16/2016] [Accepted: 03/02/2017] [Indexed: 12/13/2022]
Abstract
Persistent bacteraemia (PB) due to methicillin-resistant Staphylococcus aureus (MRSA) that fails to respond to glycopeptide therapy is a well-documented clinical problem. There are limited data on changes in agr functionality, vancomycin susceptibility and heteroresistance during MRSA PB. Thus, the frequency of these changes and their clinical significance remain unclear. Only patients with MRSA PB (≥7 days) from a prospective cohort of S. aureus bacteraemia were included. We collected isogenic paired strains and compared vancomycin MIC, vancomycin heteroresistance, and agr functionality between initial and final blood isolates. We also assessed the clinical outcome. A total of 49 patients had MRSA PB over 22 months. Bacteraemia persisted for a median of 13 days and most patients (98%) received glycopeptide as initial therapy. Among 49 isogenic pairs, only one pair showed a vancomycin MIC increase ≥2-fold by broth microdilution method, and only seven (14%) by E-test. Significant portions of initial isolates had vancomycin heteroresistance (49%) and agr dysfunction (76%). Development of vancomycin heteroresistance during PB occurred in four (16%) among 25 initial vancomycin-susceptible isolates, and acquisition of agr dysfunction occurred in two (16%) among 12 initial agr-functional isolates. Changes in the opposite direction occasionally occurred. These phenotypic changes during PB were not associated with mortality, whereas agr dysfunction of the initial isolates was significantly associated with mortality. During MRSA PB, phenotypic changes of MRSA isolates occurred occasionally under prolonged vancomycin exposure but were not significantly associated with clinical outcome. In contrast, initial agr dysfunction could be a predictor for mortality in MRSA PB.
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Affiliation(s)
- T Kim
- Division of Infectious Diseases, Department of Internal Medicine, Gyeongsang National University Hospital, 79, Gangnam-ro, Jinju, Gyeongsangnam-do, 52727, Republic of Korea
| | - E S Kim
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-ro43-gil, Songpa-gu, Seoul, 138-736, Republic of Korea
| | - S Y Park
- Division of Infectious Diseases, Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Republic of Korea
| | - H Sung
- Department of Laboratory Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - M-N Kim
- Department of Laboratory Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - S-H Kim
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-ro43-gil, Songpa-gu, Seoul, 138-736, Republic of Korea
| | - S-O Lee
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-ro43-gil, Songpa-gu, Seoul, 138-736, Republic of Korea
| | - S-H Choi
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-ro43-gil, Songpa-gu, Seoul, 138-736, Republic of Korea
| | - J-Y Jeong
- Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - J H Woo
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-ro43-gil, Songpa-gu, Seoul, 138-736, Republic of Korea
| | - Y P Chong
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-ro43-gil, Songpa-gu, Seoul, 138-736, Republic of Korea.
| | - Y S Kim
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-ro43-gil, Songpa-gu, Seoul, 138-736, Republic of Korea.
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Kim J, Sung H, Park JS, Choi SH, Shim TS, Kim MN. Subspecies distribution and macrolide and fluoroquinolone resistance genetics of Mycobacterium abscessus in Korea. Int J Tuberc Lung Dis 2016; 20:109-14. [PMID: 26688536 DOI: 10.5588/ijtld.15.0068] [Citation(s) in RCA: 10] [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
BACKGROUND Treating Mycobacterium abscessus infections with antimicrobials remains difficult, possibly due to drug resistance. OBJECTIVE To investigate the subspecies distribution of M. abscessus and its correlation with antibiotic susceptibility and the genetics of antibiotic resistance, focusing on macrolides and fluoroquinolones, in the Republic of Korea. DESIGN A total of 53 M. abscessus isolates were identified to the subspecies level by sequencing of hsp65 and erm(41). The minimal inhibitory concentrations (MICs) of clarithromycin (CLM) and ciprofloxacin (CFX) were determined using Sensititre™ RAPMYCO plates. The rrl, gyrA and gyrB genes were sequenced to elucidate the molecular mechanisms of macrolide and fluoroquinolone resistance. RESULTS Isolates included 22 M. abscessus subsp. abscessus and 31 M. abscessus subsp. bolletii. erm(41) sequences showing subspecies-specific deletions and sequence variations in the 28th nucleotide were concordant with inducible CLM resistance; however, mutations in rrl were not detected. Low- and high-level CFX resistance was observed in respectively 19 (35.8%) and 10 (18.9%) of the 53 clinical isolates, regardless of subspecies. However, no non-synonymous mutations were detected in gyrA or gyrB. CONCLUSION Sequencing of the erm gene and subspeciation of M. abscessus may be used to predict inducible macrolide susceptibility. Further studies of the relationship between specific mutations in gyrA or gyrB to MIC change are required.
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Affiliation(s)
- J Kim
- Department of Asan Medical Center and University of Ulsan College of Medicine, Seoul, Republic of Korea; Department of Laboratory Medicine, Asan Medical Center and University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - H Sung
- Department of Laboratory Medicine, Asan Medical Center and University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - J-S Park
- Department of Laboratory Medicine, Asan Medical Center and University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - S-H Choi
- Department of Internal Medicine, Asan Medical Center and University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - T-S Shim
- Department of Internal Medicine, Asan Medical Center and University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - M-N Kim
- Department of Laboratory Medicine, Asan Medical Center and University of Ulsan College of Medicine, Seoul, Republic of Korea
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Sung H, Sinclair A, Lewandowski P, Su X. Postprandial triglycerides response to krill oil supplementation in healthy women. Journal of Nutrition & Intermediary Metabolism 2016. [DOI: 10.1016/j.jnim.2015.12.172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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20
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Jung J, Song EH, Park SY, Lee SR, Park SJ, Sung H, Kim MN, Kim SH, Lee SO, Choi SH, Woo JH, Kim YS, Chong YP. Emergence of Panton-Valentine leucocidin-positive ST8-methicillin-resistant Staphylococcus aureus (USA300 clone) in Korea causing healthcare-associated and hospital-acquired bacteraemia. Eur J Clin Microbiol Infect Dis 2016; 35:1323-9. [PMID: 27209287 DOI: 10.1007/s10096-016-2668-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 05/03/2016] [Indexed: 11/24/2022]
Abstract
Panton-Valentine leucocidin (PVL)-positive sequence type (ST)8-MRSA-SCCmec IVa (USA300) is the epidemic strain of community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA) in North America. USA300 is extremely rare in South Korea, and PVL-negative ST72 SCCmec type IVc is the predominant CA-MRSA clone. In a multicentre, prospective cohort study of S. aureus bacteraemia, we identified PVL-positive ST8-MRSA isolates by performing multilocus sequence typing and PCR for PVL. We analyzed the clinical characteristics of patients with PVL-positive ST8-MRSA bacteraemia, and performed SCCmec, spa, and agr typing, PCR for arginine catabolic mobile element (ACME), virulence gene profiling, and pulsed-field gel electrophoresis (PFGE). Among a total of 818 MRSA isolates, we identified ten isolates of PVL-positive ST8-MRSA (USA300) (3 from Hospital D, 4 from Hospital G, and 3 from Hospital A), all of which involved exclusively healthcare-associated (5 isolates) and hospital-acquired bacteraemia (5 isolates). This strain accounted for 8~10 % of the hospital-acquired MRSA bacteraemia in Hospitals D and G. Bacteraemia of unknown origin was the most common type of infection followed by pneumonia. All the isolates were SCCmec type IVa, spa type t008, and agr group I. Eight of the isolates harboured ACME. In a PFGE analysis, four isolates were identical to the USA300 control strain, five differed by a single band, and the remaining one differed by two bands. All the isolates were pulsed-field type USA300. This is the first report of healthcare-associated and hospital-acquired bacteraemia caused by USA300 in South Korea. USA300 seems to be an emerging hospital clone in this country.
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Affiliation(s)
- J Jung
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, 86 Asanbyeongwon-Gil, Songpa-Gu, Seoul, 138-736, Republic of Korea
| | - E H Song
- Department of Infectious Diseases, Gangneung Asan Hospital, University of Ulsan College of Medicine, Gangneung, Republic of Korea
| | - S Y Park
- Division of Infectious Diseases, Department of Internal Medicine, Dongguk University Ilsan Hospital, Goyang, Republic of Korea
| | - S-R Lee
- Department of Internal Medicine, Cheongju St. Mary's Hospital, Cheongju, Republic of Korea
| | - S-J Park
- Center for Antimicrobial Resistance and Microbial Genetics, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - H Sung
- Department of Laboratory Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - M-N Kim
- Department of Laboratory Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - S-H Kim
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, 86 Asanbyeongwon-Gil, Songpa-Gu, Seoul, 138-736, Republic of Korea
| | - S-O Lee
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, 86 Asanbyeongwon-Gil, Songpa-Gu, Seoul, 138-736, Republic of Korea
| | - S-H Choi
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, 86 Asanbyeongwon-Gil, Songpa-Gu, Seoul, 138-736, Republic of Korea
| | - J H Woo
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, 86 Asanbyeongwon-Gil, Songpa-Gu, Seoul, 138-736, Republic of Korea
| | - Y S Kim
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, 86 Asanbyeongwon-Gil, Songpa-Gu, Seoul, 138-736, Republic of Korea
| | - Y P Chong
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, 86 Asanbyeongwon-Gil, Songpa-Gu, Seoul, 138-736, Republic of Korea.
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21
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Song S, Roh W, Kim B, Lee S, Sung H. Effects of intravenous anaesthetics on cyclopiazonic acid-induced contractions in isolated rat aorta. J Cardiothorac Vasc Anesth 2016. [DOI: 10.1053/j.jvca.2016.03.058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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22
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Yang XR, Li J, Li EN, Guida JL, Li M, Sung H, Lu N, Hu N, Gierach GL. Abstract P6-10-10: Association between mammographic density and breast cancer subtypes among Chinese women. Cancer Res 2016. [DOI: 10.1158/1538-7445.sabcs15-p6-10-10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Epidemiological studies have shown that associations between breast cancer risk and risk factors vary by tumor pathology such as estrogen receptor (ER), progesterone receptor (PR), and human epidermal growth factor receptor 2 (HER2) status. Mammographic density (MD) is a strong risk factor for breast cancer, but data on the association between MD and breast cancer subtypes have been inconsistent and most studies have been conducted among Western women. The goal of this study was to evaluate the association between MD and breast cancer subtypes in an Asian population where the proportion of dense breast tissue is higher but the overall breast cancer incidence rate is much lower compared with Western countries. Breast cancer cases from a cancer hospital in Beijing, China with MD and ER, PR, and HER2 immunohistochemical (IHC) data were included in this analysis. To reduce subtype misclassification, we excluded cases that were HER2 2+ for IHC but had no FISH data. Tumor subtypes were defined as Luminal A (ER+ or PR+ and HER2-, N=376), Luminal B (ER+ or PR+ and HER2+, N=97), HER2-overexpressing (ER- and PR- and HER2+, N=71), and triple negative (TN, ER- and PR- and HER2-, N=66). MD was assessed on digital mammograms and categorized into four levels using the Breast Imaging Reporting and Data System (BI-RADS) scoring system (a=almost entirely fat, b=scattered fibroglandular densities, c=heterogeneously dense, and d=extremely dense). Because there were few cases with almost entirely fat breasts, we combined MD levels "a" and "b" as our reference group. Polychotomous logistic regression was used to assess the association between MD and breast cancer subtypes with the adjustment of age, menopausal status, parity, age at menarche, and body mass index (BMI) since all these variables showed significant inverse associations with MD (P=0.002 for age at menarche and P<0.0001 for all others). Compared with luminal A cases, cases with HER2-overexpressing tumors were significantly more likely to have extremely dense breasts (Odds ratio [OR], 2.6; 95% confidence interval [CI], 1.2-5.7). Cases with luminal B (OR, 2.1, 95% CI, 1.2-3.9) and TN (OR, 2.9, 95% CI, 1.5-5.8) tumors had significantly higher proportions of heterogeneously dense but not extremely dense tissue compared with luminal A cases. Our data suggest that higher MD is associated with more aggressive tumor subtypes, particularly the HER2-overexpressing subtype among Chinese breast cancer cases. If confirmed in larger studies, these results may provide insight into the higher incidence rates of HER2-overexpressing breast cancer seen among young Asian American and Asian women.
Citation Format: Yang XR, Li J, Li E-N, Guida JL, Li M, Sung H, Lu N, Hu N, Gierach GL. Association between mammographic density and breast cancer subtypes among Chinese women. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P6-10-10.
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Affiliation(s)
- XR Yang
- National Cancer Institute, Bethesda, MD; Cancer Hospital, Chinese Academy of Medical Sciences, Beijing, China; Chinese University of Hong Kong, Hong Kong, China
| | - J Li
- National Cancer Institute, Bethesda, MD; Cancer Hospital, Chinese Academy of Medical Sciences, Beijing, China; Chinese University of Hong Kong, Hong Kong, China
| | - E-N Li
- National Cancer Institute, Bethesda, MD; Cancer Hospital, Chinese Academy of Medical Sciences, Beijing, China; Chinese University of Hong Kong, Hong Kong, China
| | - JL Guida
- National Cancer Institute, Bethesda, MD; Cancer Hospital, Chinese Academy of Medical Sciences, Beijing, China; Chinese University of Hong Kong, Hong Kong, China
| | - M Li
- National Cancer Institute, Bethesda, MD; Cancer Hospital, Chinese Academy of Medical Sciences, Beijing, China; Chinese University of Hong Kong, Hong Kong, China
| | - H Sung
- National Cancer Institute, Bethesda, MD; Cancer Hospital, Chinese Academy of Medical Sciences, Beijing, China; Chinese University of Hong Kong, Hong Kong, China
| | - N Lu
- National Cancer Institute, Bethesda, MD; Cancer Hospital, Chinese Academy of Medical Sciences, Beijing, China; Chinese University of Hong Kong, Hong Kong, China
| | - N Hu
- National Cancer Institute, Bethesda, MD; Cancer Hospital, Chinese Academy of Medical Sciences, Beijing, China; Chinese University of Hong Kong, Hong Kong, China
| | - GL Gierach
- National Cancer Institute, Bethesda, MD; Cancer Hospital, Chinese Academy of Medical Sciences, Beijing, China; Chinese University of Hong Kong, Hong Kong, China
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Song PH, Sung H, Lee J, Yoon WJ, Kim YS, Moon JS, Ryu SH, Lee SW, Jung HC. The accuracy of endoscopic ultrasonography for identifying stomach neoplasm before endoscopic submucosal dissection. J Clin Oncol 2016. [DOI: 10.1200/jco.2016.34.4_suppl.22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
22 Background: The treatment of stomach neoplasm was determined by the identification on of invasion extent and perigastric lymph node through endoscopic ultrasonography (EUS). In this study, we investigated diagnostic accuracy of EUS examination before endoscopic submucosal dissection (ESD). Methods: A retrospective study was conducted to both EUS and ESD for stomach neoplasms that were performed at Seoul Paik Hospital between January 2006 and July 2015. We compared the accuracy of EUS according to the location of lesion, tumor size and ulcer presence or absence on lesion. Results: 49 patients were enrolled in this study; their mean age was 64.14 ± 11.33 years. There were 40 male (81.6%) and 9 female (18.4%) patients. The cases of confined to the mucosa on pathology finding were 41 (83.6%) and involved to submucosal layer(sm) 1 were 3 (6.1%) and sm2 were 2 (4%) and sm3 were 1 (2%) and proper muscle layer were 2 (4%). The cases of lymphatic invasion were 2 (4%). The sensitivity and accuracy of antrum were 91.6 % (95% CI: 0.81-1.03) and 83.3 % (95% CI: 0.70-0.97), body of stomach were 92.3 % (CI: 0.78-1.07) and 83.3% (CI: 0.66-1.00), respectively. Whether lesions were no significant differences in any location. The tumor size was divided by smaller than 20 mm group, 20-30 mm group and more than 30 mm group. The smaller than 20 mm group, 20-30 mm group and more than 30 mm group were 36, 9, 2 patients. The remaining 2 patients were not described. The sensitivity and accuracy of smaller than 20 mm group were 96.6 % (95% CI: 0.90-1.03) and 83.3 % (CI: 0.71-0.95) and 2-30 mm group were 66.7 % (CI: 0.29-1.04) and 77.8 % (CI: 0.51-1.04), respectively. All patients were divided by ulcer presence or not. 27 patients were ulcer presence and 22 patients were not. The sensitivity and accuracy of ulcer presence group were 77.3 % (CI : 0.60-0.95) and 74 % (CI : 0.57-0.90), ulcer absence group were 95 % (CI : 0.85-1.04) and 91 % (CI : 0.79-1.02). Conclusions: The EUS for stomach neoplasm was reliable of lesion without ulcerous finding, smaller than 20 mm in diameter and irrespective of stomach neoplasm location.
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Affiliation(s)
- Pil Hun Song
- Department of Internal Medicine, Inje University College of Medicine, Seoul Paik Hospital, Seoul, South Korea
| | - Hyun Sung
- Department of Internal Medicine, Inje University College of Medicine, Seoul Paik Hospital, Seoul, South Korea
| | - Jeonghun Lee
- Department of Internal Medicine, Inje University College of Medicine, Seoul Paik Hospital, Seoul, South Korea
| | | | - You Sun Kim
- Department of Internal Medicine, Inje University College of Medicine, Seoul Paik Hospital, Seoul, South Korea
| | - Jeong Seop Moon
- Department of Internal Medicine, Inje University College of Medicine, Seoul Paik Hospital, Seoul, South Korea
| | - Soo Hyung Ryu
- Department of Internal Medicine, Inje University College of Medicine, Seoul Paik Hospital, Seoul, South Korea
| | - Sang Woo Lee
- Division of Gastroenterology, Department of Internal Medicine, Korea University Ansan Hospital, Seoul, South Korea
| | - Hyun chae Jung
- Seoul National University College of Medicine, Seoul, South Korea
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24
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Moon JS, Seol SY, Song PH, Sung H, Lee J, Kim JJ, Yoon WJ, Ryu SH, Kim YS. The usefulness of condom method EUS for esophageal mass evaluation. J Clin Oncol 2016. [DOI: 10.1200/jco.2016.34.4_suppl.23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
23 Background: The endoscopic ultrasonography (EUS) is positioned as the method of choice to evaluate the origin and depth of invasion for the esophageal mass. To overcome the disadvantages as aspiration resulting from water filling EUS and balloon rupture resulting from balloon EUS, we used condom method EUS for esophageal mass evaluation. Methods: We investigated retrospectively twenty six patients examined condom method EUS using high frequency ultrasound probes after diagnosed esophageal mass lesion including submucosal tumor by standard endoscopy between January 2007 and April 2015 at Seoul Paik Hospital, Seoul, Korea. We checked the originating layer, invasion depth and echogenicity of the mass and events complicated by procedure. Results: The condom method EUS provided high quality images without aeration and well-defined five layers of esophagus through 360 degrees. In all segments of esophagus; upper (n = 5), middle (n = 10), lower esophagus(n = 11), showed high resolution images without difference. Diagnosis were squamous cell cancer (n = 4), leiomyoma (n = 5), squamous intraepithelial neoplasia (n = 2), acanthosis (n = 2), inflammatory fibrinoid polyp (n = 1) and extrinsic compression (n = 1). Tumors were originated from mucosa (n = 5), muscularis mucosa (n = 10), submucosa (n = 3), mucosa invading into submucosa (n = 4), muscle propria (n = 3). One was diagnosed as outer compression. In esophageal cancer patients, by confirming the location and invasion of the tumor, we could make a decision the next step such as follow up, endoscopic removal or surgery. No complications had occurred in all cases, aspiration or balloon rupture. Conclusions: The condom method EUS is already known as a safe image diagnostic tool of high resolution. Simply to apply inexpensive latex condom filled with water can provide good EUS visual field and images of the esophageal mass lesions along the whole esophagus without aspiration risk.
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Affiliation(s)
- Jeong Seop Moon
- Department of Internal Medicine, Inje University College of Medicine, Seoul Paik Hospital, Seoul, South Korea
| | | | - Pil Hun Song
- Department of Internal Medicine, Inje University College of Medicine, Seoul Paik Hospital, Seoul, South Korea
| | - Hyun Sung
- Department of Internal Medicine, Inje University College of Medicine, Seoul Paik Hospital, Seoul, South Korea
| | - Jeonghun Lee
- Department of Internal Medicine, Inje University College of Medicine, Seoul Paik Hospital, Seoul, South Korea
| | - Jae J Kim
- Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
| | - Won Jae Yoon
- Department of Internal Medicine, Inje University College of Medicine, Seoul Paik Hospital, Seoul, South Korea
| | - Soo Hyung Ryu
- Department of Internal Medicine, Inje University College of Medicine, Seoul Paik Hospital, Seoul, South Korea
| | - You Sun Kim
- Department of Internal Medicine, Inje University College of Medicine, Seoul Paik Hospital, Seoul, South Korea
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Kim T, Jung J, Kim SM, Seo DW, Lee YS, Kim WY, Lim KS, Sung H, Kim MN, Chong YP, Lee SO, Choi SH, Kim YS, Woo JH, Kim SH. Transmission among healthcare worker contacts with a Middle East respiratory syndrome patient in a single Korean centre. Clin Microbiol Infect 2015; 22:e11-e13. [PMID: 26384679 PMCID: PMC7128147 DOI: 10.1016/j.cmi.2015.09.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Accepted: 09/07/2015] [Indexed: 11/12/2022]
Affiliation(s)
- T Kim
- Department of Infectious Diseases, Republic of Korea
| | - J Jung
- Department of Infectious Diseases, Republic of Korea
| | - S-M Kim
- Department of Infectious Diseases, Republic of Korea
| | - D-W Seo
- Department of Emergency Medicine, Republic of Korea
| | - Y S Lee
- Department of Emergency Medicine, Republic of Korea
| | - W Y Kim
- Department of Emergency Medicine, Republic of Korea
| | - K S Lim
- Department of Emergency Medicine, Republic of Korea
| | - H Sung
- Department of Laboratory Medicine, Asan Medical Centre, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - M-N Kim
- Department of Laboratory Medicine, Asan Medical Centre, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Y P Chong
- Department of Infectious Diseases, Republic of Korea
| | - S-O Lee
- Department of Infectious Diseases, Republic of Korea
| | - S-H Choi
- Department of Infectious Diseases, Republic of Korea
| | - Y S Kim
- Department of Infectious Diseases, Republic of Korea
| | - J H Woo
- Department of Infectious Diseases, Republic of Korea
| | - S-H Kim
- Department of Infectious Diseases, Republic of Korea.
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Kim BR, Kim JE, Sung H, Cho YK. Long-term follow up of HIV-1-infected Korean haemophiliacs, after infection from a common source of virus. Haemophilia 2015; 21:e1-11. [PMID: 25545303 DOI: 10.1111/hae.12527] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [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: 06/23/2014] [Indexed: 12/21/2022]
Abstract
In the early 1990s, 20 haemophiliacs (HPs) were infected with a common source of HIV-1 viruses through the contaminated clotting factor IX. The aim of this study is to review 20 HPs infected with a common source of virus. The enrolled patients have been consecutively treated with Korean red ginseng (KRG), zidovudine (ZDV) or two-drug therapy and highly active antiretroviral therapy (HAART). We determined full-length pol gene over 20 years and human leukocyte antigen (HLA) class I with peripheral blood mononuclear cells and reviewed medical records. Eighteen HPs experienced various opportunistic infections or clinical manifestations. There were significant inverse correlations between the HLA prognostic score and the annual decrease in CD4+ T-cell counts prior to HAART (AD) (P < 0.05) and the amount of KRG and the AD (P < 0.01). From 1998, the HPs had been treated with HAART. Each of the two patients died without and with HAART regimen respectively. At present, 16 HPs have been alive with HAART. Among the 16 HPs, 12 and 4 are on HAART-plus-KRG and HAART only respectively. Eleven HPs including 2 HPs with G-to-A hypermutations had revealed resistance mutations. Ten and two HPs have shown poor adherence and incomplete viral suppres-sion on HAART respectively. Virological failure based on WHO guidelines was not observed on KRG-plus-HAART. Two HPs revealed additional resistance mutations against two classes on KRG-plus-HAART. As a nationwide study, we first report overall features on clinical course of Korean haemophiliacs. Further education on the importance of drug adherence is needed.
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Affiliation(s)
- B-R Kim
- Departments of Microbiology; and Department of Laboratory Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Korea
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Kim SH, Ha YE, Youn JC, Park JS, Sung H, Kim MN, Choi HJ, Lee YJ, Kang SM, Ahn JY, Choi JY, Kim YJ, Lee SK, Kim SJ, Peck KR, Lee SO, Kim YH, Hwang S, Lee SG, Ha J, Han DJ. Fatal scedosporiosis in multiple solid organ allografts transmitted from a nearly-drowned donor. Am J Transplant 2015; 15:833-40. [PMID: 25639881 DOI: 10.1111/ajt.13008] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 09/05/2014] [Accepted: 09/11/2014] [Indexed: 01/25/2023]
Abstract
Scedosporium spp. is the most common mold infection in pneumonia resulting from near-drowning. Three fatal scedosporiosis cases developed after solid organ transplantation, probably transmitted from the nearly-drowned donor. One heart transplant recipient and two kidney transplant recipients developed fatal scedosporiosis following deceased donor transplantation from the same donor, a nearly-drowned victim of a suicide attempt. Genotypically, indistinguishable strains of Scedosporium auratiacum were recovered from the three recipients. Two liver transplant recipients from the same donor received prophylactic voriconazole without any subsequent signs of infection. To determine the safety of donation from nearly-drowned donors, a national traceback investigation was also performed of the causes of deaths in all transplant recipients who received organs from drowned donors between 2001 and 2013. Over 13 years, 2600 deceased donor transplants were performed in Korea. Among these 2600 deceased donor transplants, 27 (1%) victims of drowning donated their organs. From these 27 donors, 84 patients received organ transplants and 18 died, including the above three. We found no microbiologic evidence of invasive mold transmission from the nearly-drowned donors to the other 15 recipients. Although disseminated infection in the donor could not be demonstrated by culture, undiagnosed disseminated donor infection and transmission of Scedosporium spp. should be considered in near-drowning events.
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Affiliation(s)
- S-H Kim
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
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Yun JH, Sung H, Kim T, Hong SI, Chong YP, Kim SH, Choi SH, Kim YS, Woo JH, Lee SO. Comparison of the clinical characteristics of Mycobacterium tuberculosis and nontuberculous mycobacteria patients with joint involvement. Infection 2015; 43:207-9. [PMID: 25623639 DOI: 10.1007/s15010-015-0731-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Accepted: 01/14/2015] [Indexed: 01/15/2023]
Abstract
Nontuberculous mycobacteria (NTM) joint involvement is rare. However, the incidence of NTM disease is increasing and it is difficult to distinguish NTM from Mycobacterium tuberculosis (MTB). Here, the clinical characteristics of NTM joint involvement were compared with those of MTB. Distal joint involvement and precipitating factors were significantly more frequent for NTM joint infections. Because pathologic findings of NTM and MTB were similar, microbiological investigations are needed.
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Affiliation(s)
- J H Yun
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-ro 43-gil, Songpa-gu, Seoul, 138-736, Republic of Korea
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29
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Doh YS, Kim YS, Jung HJ, Park YI, Mo JW, Sung H, Lee KJ, Seo YK, Moon JS, Hong SW. Long-Term Clinical Outcome of Clostridium difficile Infection in Hospitalized Patients: A Single Center Study. Intest Res 2014; 12:299-305. [PMID: 25374496 PMCID: PMC4214957 DOI: 10.5217/ir.2014.12.4.299] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Revised: 05/09/2014] [Accepted: 05/10/2014] [Indexed: 01/25/2023] Open
Abstract
Background/Aims Antibiotic usage and increasingly aging populations have led to increased incidence of Clostridium difficile infection (CDI) in worldwide. Recent studies in Korea have also reported increasing CDI incidence; however, there have been no reports on the long-term outcomes of CDI. We therefore investigated the long-term clinical outcomes of patients with CDI, including delayed recurrence, associated risk factors and mortality. Methods Hospitalized patients diagnosed with CDI at Seoul Paik Hospital between January 2007 and December 2008 were included. Their medical records were retrospectively investigated. 'Delayed recurrence' was defined as a relapse 8 weeks after a successful initial treatment. Multivariate logistic regression analysis was performed to identify risk factors for the delayed recurrence. Kaplan-Meier curves were used to analyze mortality rates. Results A total of 120 patients were enrolled; among them, 87 were followed-up for at least 1 year, with a mean follow-up period of 34.1±25.1 months. Delayed recurrence was observed in 17 patients (19.5%), and significant risk factors were age (over 70 years, P=0.049), nasogastric tube insertion (P=0.008), and proton pump inhibitor or H2-blocker treatments (P=0.028). The 12- and 24-month mortality rates were 24.6% and 32.5%, respectively. No deaths were directly attributed to CDI. Conclusions Delayed recurrence of CDI was not rare, occurring in 19.5% of the study population. Although CDI-related mortality was not reported, 2-year (32.5%) mortality rate of CDI patients implies that a CDI diagnosis may predict severe morbidity and poor prognosis of the underlying disease.
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Affiliation(s)
- Young Seok Doh
- Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - You Sun Kim
- Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - Hye Jin Jung
- Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - Young Il Park
- Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - Jin Won Mo
- Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - Hyun Sung
- Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - Kyung Jin Lee
- Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - Young Ki Seo
- Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - Jeong Seop Moon
- Department of Internal Medicine, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - Seong Woo Hong
- Department of Surgery, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
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Lee YM, Kim Y, Han D, Park SK, Park J, Sung H, Hong HL, Kim T, Kim SH, Choi SH, Kim Y, Woo J, Lee SO. Cytomegalovirus infection after acute rejection therapy in seropositive kidney transplant recipients. Transpl Infect Dis 2014; 16:397-402. [DOI: 10.1111/tid.12227] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Revised: 12/17/2013] [Accepted: 01/20/2014] [Indexed: 11/29/2022]
Affiliation(s)
- Y.-M. Lee
- Department of Infectious Diseases; Asan Medical Center; University of Ulsan College of Medicine; Seoul Korea
- Department of Infectious Diseases; Busan Paik Hospital; Inje University College of Medicine; Busan Korea
| | - Y.H. Kim
- Department of Surgery; Asan Medical Center; University of Ulsan College of Medicine; Seoul Korea
| | - D.J. Han
- Department of Surgery; Asan Medical Center; University of Ulsan College of Medicine; Seoul Korea
| | - S.-K. Park
- Department of Nephrology; Asan Medical Center; University of Ulsan College of Medicine; Seoul Korea
| | - J.S. Park
- Department of Nephrology; Asan Medical Center; University of Ulsan College of Medicine; Seoul Korea
| | - H. Sung
- Department of Laboratory Medicine; Asan Medical Center; University of Ulsan College of Medicine; Seoul Korea
| | - H.-L. Hong
- Department of Infectious Diseases; Asan Medical Center; University of Ulsan College of Medicine; Seoul Korea
| | - T. Kim
- Department of Infectious Diseases; Asan Medical Center; University of Ulsan College of Medicine; Seoul Korea
| | - S.-H. Kim
- Department of Infectious Diseases; Asan Medical Center; University of Ulsan College of Medicine; Seoul Korea
| | - S.-H. Choi
- Department of Infectious Diseases; Asan Medical Center; University of Ulsan College of Medicine; Seoul Korea
| | - Y.S. Kim
- Department of Infectious Diseases; Asan Medical Center; University of Ulsan College of Medicine; Seoul Korea
| | - J.H. Woo
- Department of Infectious Diseases; Asan Medical Center; University of Ulsan College of Medicine; Seoul Korea
| | - S.-O. Lee
- Department of Infectious Diseases; Asan Medical Center; University of Ulsan College of Medicine; Seoul Korea
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Sung H, Hollenbeck P. Mitochondrial quality control and autophagosomal process in Parkinson’s disease model (LB170). FASEB J 2014. [DOI: 10.1096/fasebj.28.1_supplement.lb170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Hyun Sung
- Biological Sciences Purdue UniversityWest LafayetteINUnited States
| | - Peter Hollenbeck
- Biological Sciences Purdue UniversityWest LafayetteINUnited States
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González S, Sung H, Sepúlveda D, González MJ, Molina C. Oral manifestations and their treatment in Sjögren′s syndrome. Oral Dis 2013; 20:153-61. [DOI: 10.1111/odi.12105] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2012] [Revised: 02/27/2013] [Accepted: 03/07/2013] [Indexed: 11/26/2022]
Affiliation(s)
- S González
- Oral Pathology Department; Faculty of Dentistry; Mayor University; Santiago Chile
| | - H Sung
- Faculty of Medicine; Institute of Biomedical Sciences (ICBM); University of Chile; Santiago Chile
| | - D Sepúlveda
- Faculty of Medicine; Institute of Biomedical Sciences (ICBM); University of Chile; Santiago Chile
| | - MJ González
- Faculty of Medicine; Institute of Biomedical Sciences (ICBM); University of Chile; Santiago Chile
| | - C Molina
- Oral Pathology Department; Faculty of Dentistry; Mayor University; Santiago Chile
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Park SY, Kim YH, Han DJ, Park SK, Park JS, Sung H, Park HJ, Kim SH, Choi SH, Kim YS, Woo JH, Lee SO. Efficacy of a strategy for discontinuing pre-emptive ganciclovir therapy after a negative cytomegalovirus antigenaemia test result in seropositive kidney transplant recipients. J Antimicrob Chemother 2013; 68:1209-11. [DOI: 10.1093/jac/dks524] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Moon S, Sung H, Kim MN, Lee SO, Choi SH, Kim Y, Woo J, Kim SH. Diagnostic yield of the cytomegalovirus (CMV) antigenemia assay and clinical features in solid organ transplant recipients and hematopoietic stem cell transplant recipients with CMV pneumonia. Transpl Infect Dis 2012; 14:192-7. [DOI: 10.1111/j.1399-3062.2011.00703.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2011] [Revised: 08/23/2011] [Accepted: 10/06/2011] [Indexed: 12/29/2022]
Affiliation(s)
- S.M. Moon
- Department of Infectious Diseases; Asan Medical Center; University of Ulsan College of Medicine; Seoul Republic of Korea
- Graduate School of Kyung Hee University; Seoul Republic of Korea
| | - H. Sung
- Department of Laboratory Medicine; Asan Medical Center; University of Ulsan College of Medicine; Seoul Republic of Korea
| | - M.-N. Kim
- Department of Laboratory Medicine; Asan Medical Center; University of Ulsan College of Medicine; Seoul Republic of Korea
| | - S.-O. Lee
- Department of Infectious Diseases; Asan Medical Center; University of Ulsan College of Medicine; Seoul Republic of Korea
| | - S.-H. Choi
- Department of Infectious Diseases; Asan Medical Center; University of Ulsan College of Medicine; Seoul Republic of Korea
| | - Y.S. Kim
- Department of Infectious Diseases; Asan Medical Center; University of Ulsan College of Medicine; Seoul Republic of Korea
| | - J.H. Woo
- Department of Infectious Diseases; Asan Medical Center; University of Ulsan College of Medicine; Seoul Republic of Korea
| | - S.-H. Kim
- Department of Infectious Diseases; Asan Medical Center; University of Ulsan College of Medicine; Seoul Republic of Korea
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Kim JE, Sung H, Kim MN, Won CH, Chang SE, Lee MW, Choi JH, Moon KC. Synchronous infection with Mycobacterium chelonae and Paecilomyces in a heart transplant patient. Transpl Infect Dis 2011; 13:80-3. [PMID: 20412536 DOI: 10.1111/j.1399-3062.2010.00507.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A 41-year-old male who was 3 years status post heart transplant presented with a 3-month history of painful erythematous nodules and ulcers on his lower legs and right hand. First, Mycobacterium chelonae infection was revealed through several biopsies with molecular sequence analysis, and combination treatment, including clarithromycin, was started. During the treatment, lesions of the legs showed an improvement, but a fluctuant erythematous nodule on the thumb did not respond. Repetitive biopsy from the thumb ultimately identified Paecilomyces species and the patient was treated with itraconazole and terbinafine sequentially. Our case is the first report, to our knowledge, of synchronous infection with non-tuberculous mycobacteria (NTM) and Paecilomyces in a solid organ transplant recipient. Our findings highlight the importance of recognizing cutaneous NTM infections or deep mycoses, as well as the importance of choosing an appropriate treatment.
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Affiliation(s)
- J-E Kim
- Department of Dermatology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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Kim DW, Sung H, Shin D, Shen H, Ahnn J, Lee SK, Lee S. Differential physiological roles of ESCRT complexes in Caenorhabditis elegans. Mol Cells 2011; 31:585-92. [PMID: 21688204 PMCID: PMC3887624 DOI: 10.1007/s10059-011-1045-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [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: 03/10/2011] [Revised: 05/20/2011] [Accepted: 05/23/2011] [Indexed: 01/28/2023] Open
Abstract
Endosomal sorting complex required for transport (ESCRT) complexes are involved in endosomal trafficking to the lysosome, cytokinesis, and viral budding. Extensive genetic, biochemical, and structural studies on the ESCRT system have been carried out in yeast and mammalian systems. However, the question of how the ESCRT system functions at the whole organism level has not been fully explored. In C. elegans, we performed RNAi experiments to knock-down gene expression of components of the ESCRT system and profiled their effects on protein degradation and endocytosis of YP170, a yolk protein. Targeted RNAi knock-down of ESCRT-I (tsg-101 and vps-28) and ESCRT-III (vps-24, and vps-32.2) components interfered with protein degradation while knock-down of ESCRT-II (vps-25 and vps-36) and ESCRT-III (vps-20 and vps-24) components hampered endocytosis. In contrast, the knockdown of vps-37, another ESCRT-I component, showed no defect in either YP170 uptake or degradation. Depletion of at least one component from each complex - ESCRT-0 (hgrs-1), ESCRT-I (tsg-101, vps-28, and vps-37), ESCRT-II (vps-36), ESCRT-III (vps-24), and Vps4 (vps-4) - resulted in abnormal distribution of embryos in the uterus of worms, possibly due to abnormal ovulation, fertilization, and egglaying. These results suggest differential physiological roles of ESCRT-0, -I, -II, and -III complexes in the context of the whole organism, C. elegans.
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Affiliation(s)
- Dong-Wan Kim
- Department of Life Science, Hanyang University, Seoul 133-791, Korea
| | - Hyun Sung
- Department of Life Science, Hanyang University, Seoul 133-791, Korea
| | - Donghyuk Shin
- Department of Biological Sciences, Sungkyunkwan University, Suwon 440- 746, Korea
| | - Haihong Shen
- Department of Life Science, Gwangju Institute of Science and Technology, Gwangju 500-712, Korea
| | - Joohong Ahnn
- Department of Life Science, Hanyang University, Seoul 133-791, Korea
- The Research Institute for Natural Sciences, Hanyang University, Seoul 133-791, Korea
| | - Sun-Kyung Lee
- Department of Life Science, Hanyang University, Seoul 133-791, Korea
- The Research Institute for Natural Sciences, Hanyang University, Seoul 133-791, Korea
| | - Sangho Lee
- Department of Biological Sciences, Sungkyunkwan University, Suwon 440- 746, Korea
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Dwivedi M, Sung H, Shen H, Park BJ, Lee S. Disruption of endocytic pathway regulatory genes activates autophagy in C. elegans. Mol Cells 2011; 31:477-81. [PMID: 21618079 PMCID: PMC3887608 DOI: 10.1007/s10059-011-1035-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2011] [Accepted: 03/14/2011] [Indexed: 10/18/2022] Open
Abstract
Autophagy and endocytic pathway are highly regulated catabolic processes. Both processes are crucial for cell growth, development, differentiation, disease and homeostasis and exhibit membrane rearrangement for their function. Autophagy and endocytic pathway represent branches of the lysosomal digestive system, autophagy being responsible for degradation of cytoplasmic components and endocytic pathway for degradation of exogenous substances. Here we report that autophagy is activated when endocytic pathway regulatory genes such as rab-5 and rabx-5 are disrupted. Defects in the ubiquitin binding domain of RABX-5 are critical in activating autophagy. We also observed that the elevated autophagy level does not contribute to lifespan extension of rabx-5 mutant. Our results suggest that autophagy may compensate for the endocytic pathway when regulatory genes for the endocytic pathway malfunction, providing a case of complementation between two functionally related cellular processes.
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Affiliation(s)
- Meenakshi Dwivedi
- Dr. B.R. Ambedkar Center for Biomedical Research, University of Delhi, Delhi, India
- These authors contributed equally to this work
| | - Hyun Sung
- Department of Biological Sciences, Purdue University, USA
- These authors contributed equally to this work
| | - Haihong Shen
- School of Life Science, Gwangju Institute of Science and Technology, Gwangju 500-712, Korea
| | - Byung-Jae Park
- Department of Life Science, Hallym University, Chunchon 200-702, Korea
| | - Sangho Lee
- Department of Biological Sciences, Sungkyunkwan University, Suwon 440-746, Korea
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Park S, Kim SH, Choi SH, Sung H, Kim MN, Woo J, Kim Y, Park SK, Lee JH, Lee KH, Lee SG, Han D, Lee SO. Clinical and radiological features of invasive pulmonary aspergillosis in transplant recipients and neutropenic patients. Transpl Infect Dis 2010; 12:309-15. [DOI: 10.1111/j.1399-3062.2010.00499.x] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Nogueira C, Kim KH, Sung H, Paraiso KHT, Dannenberg JH, Bosenberg M, Chin L, Kim M. Cooperative interactions of PTEN deficiency and RAS activation in melanoma metastasis. Oncogene 2010; 29:6222-32. [PMID: 20711233 PMCID: PMC2989338 DOI: 10.1038/onc.2010.349] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [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: 12/30/2022]
Abstract
Mitogen-activated protein kinase (MAPK) and AKT pathways are frequently co-activated in melanoma through overexpression of receptor tyrosine kinases, mutations in their signaling surrogates, such as RAS and BRAF, or loss of negative regulators such as PTEN. As RAS can be a positive upstream regulator of PI3-K, it has been proposed that the loss of PTEN and the activation of RAS are redundant events in melanoma pathogenesis. Here, in genetically engineered mouse models of cutaneous melanomas, we sought to better understand the genetic interactions between HRAS activation and PTEN inactivation in melanoma genesis and progression in vivo. We showed that HRAS activation cooperates with Pten+/- and Ink4a/Arf-/- to increase melanoma penetrance and promote metastasis. Correspondingly, gain- and loss-of-function studies established that Pten loss increases invasion and migration of melanoma cells and non-transformed melanocytes, and such biological activity correlates with a shift to phosphorylation of AKT2 isoform and E-cadherin down-regulation. Thus, Pten inactivation can drive the genesis and promote the metastatic progression of RAS activated Ink4a/Arf deficient melanomas.
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Affiliation(s)
- C Nogueira
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
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Lee SO, Rim J, Sung H, Kim SH, Choi SH, Lee C, Yun T, Lee JW, Woo J, Kim Y, Kim JJ. Comparison of higher dose and lower dose ganciclovir for cytomegalovirus prophylaxis in seropositive heart transplant recipients. Transpl Infect Dis 2010; 12:31-7. [DOI: 10.1111/j.1399-3062.2009.00450.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Chauvat D, Hajj B, Mojzisova H, Oron D, Sung H, Winter S, Zielinski M, Zyss J. Advances in polarization sensitive multiphoton nano-bio-imaging. EPJ Web of Conferences 2010. [DOI: 10.1051/epjconf/20100506010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Abada EAE, Sung H, Dwivedi M, Park BJ, Lee SK, Ahnn J. C. elegans behavior of preference choice on bacterial food. Mol Cells 2009; 28:209-13. [PMID: 19756391 DOI: 10.1007/s10059-009-0124-x] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [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: 06/22/2009] [Revised: 07/13/2009] [Accepted: 07/20/2009] [Indexed: 11/30/2022] Open
Abstract
Caenorhabditis elegans is a free living soil nematode and thus in its natural habitat, C. elegans encounters many different species of soil bacteria. Although some soil bacteria may be excellent sources of nutrition for the worm, others may be pathogenic. Thus, we undertook a study to understand how C. elegans can identify their preferred food using a simple behavioral assay. We found that there are various species of soil bacteria that C. elegans prefers in comparison to the standard laboratory E. coli strain OP50. In particular, two bacterial strains, Bacillus mycoides and Bacillus soli, were preferred strains. Interestingly, the sole feeding of these bacteria to wild type animals results in extended lifespan through the activation of the autophagic process. Further studies will be required to understand the precise mechanism controlling the behavior of identification and selection of food in C. elegans.
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Affiliation(s)
- Emad Abd-elmoniem Abada
- Brain Korea 21 Life Science for Global Warming Team, Department of Life Science, Hanyang University, Seoul, Korea
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Cho JH, Song HO, Singaravelu G, Sung H, Oh WC, Kwon S, Kim DH, Ahnn J. Pleiotropic roles of calumenin (calu-1), a calcium-binding ER luminal protein, inCaenorhabditis elegans. FEBS Lett 2009; 583:3050-6. [DOI: 10.1016/j.febslet.2009.08.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2009] [Revised: 08/11/2009] [Accepted: 08/13/2009] [Indexed: 11/29/2022]
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Seo H, Sung H, Choi I, Oh S, Seo J, Shin S, Kim Y, Park K, Kim J. Prognostic significance of serum vascular endothelial growth factor per platelet count in gastric cancer patients. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.e22031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e22031 Background: Recent studies have shown that VEGF expression not in tissues but in serum sample is correlated with tumor vascularity, and high serum VEGF levels could predict poor prognosis in cancer patients. However there are limited data regarding the clinical and prognostic significance of serum VEGF levels per platelet count in advanced gastric cancer. In this study, we conducted a study to evaluate the prognostic implication of serum VEGF per platelet count in patients with advanced gastric cancer. Methods: 111 patients with histologically confirmed gastric cancer, 10 patients with early gastric cancer were included and control serum samples were acquired from 10 healthy volunteers. The levels of VEGF were measured using human VEGF quantitative enzyme-linked immunosorbent assay (ELISA). Survival curves were calculated using the Kaplan-Meier method and survival comparisons were made by the log rank test in metastatic gastric cancer. The Cox proportional hazards regression model was utilized for multivariate analyses after univariate analysis defined relevant prognostic variables. Results: A trend toward a significant positive correlation between serum VEGF and platelet counts was observed in patients of AGC (r = 0.477, P = 0.000) and there was a significant correlation between serum VEGF levels and differentiation of tumor (p = 0.014), stage (p = 0.036). The overall survival (log rank, p =0.0432) and the progression free survival (median 4.5 vs. 8.9 months; log rank, p =0.0116) were significantly shorter in patients with high VEGF per platelet count (≥1.626 pg/106). In the multivarivate analysis, performance status (P=0.025), the presence of peritoneal carcinomatosis (P=0.006), serum VEGF per platelet (P=0.005) were found to be significantly associated with poor progression free survival. Conclusions: This study demonstrated that serum VEGF per platelet count are correlated with poor overall survival and progression free survival in patients with advanced gastric cancer. Therefore measurement of serum VEGF per platelet might be useful markers for predicting disease progression and prognosis of advanced gastric cancer. No significant financial relationships to disclose.
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Affiliation(s)
- H. Seo
- Korea University Hospital, Seoul, Republic of Korea
| | - H. Sung
- Korea University Hospital, Seoul, Republic of Korea
| | - I. Choi
- Korea University Hospital, Seoul, Republic of Korea
| | - S. Oh
- Korea University Hospital, Seoul, Republic of Korea
| | - J. Seo
- Korea University Hospital, Seoul, Republic of Korea
| | - S. Shin
- Korea University Hospital, Seoul, Republic of Korea
| | - Y. Kim
- Korea University Hospital, Seoul, Republic of Korea
| | - K. Park
- Korea University Hospital, Seoul, Republic of Korea
| | - J. Kim
- Korea University Hospital, Seoul, Republic of Korea
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Park SY, Sung H, Park KT, Kim SC, Kim SH, Choi SH, Kim YS, Woo JH, Lee SO, Han DJ. Parainfluenza virus 3 pneumonia in a kidney transplant recipient. Transpl Infect Dis 2009; 11:333-6. [PMID: 19356218 DOI: 10.1111/j.1399-3062.2009.00387.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
We report the first case of parainfluenza virus type 3 (PIV3) pneumonia in a kidney transplant recipient. A 39-year-old man developed pneumonia during hospitalization 6 years after kidney transplantation. He became hypoxic and underwent noninvasive ventilation. PIV3 was detected in the bronchoalveolar lavage fluid. He was treated successfully with aerosolized ribavirin and intravenous immunoglobulin. Although he recovered from pneumonia, his graft function deteriorated and he had to restart peritoneal dialysis.
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Affiliation(s)
- S Y Park
- Department of Infectious Diseases, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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Tan SY, Sung H. Carlos Juan Finlay (1833-1915): of mosquitoes and yellow fever. Singapore Med J 2008; 49:370-371. [PMID: 18465043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- S Y Tan
- University of Hawaii, HI, USA
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Tan SY, Sung H. Mary Edwards Walker (1832-1919): surgeon, feminist and war heroine. Singapore Med J 2008; 49:186-187. [PMID: 18362997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- S Y Tan
- University of Hawaii, HI, USA
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Oh SC, Kim Y, Kim J, Choi I, Sung H, Seo H, Shin S. Phase II trial of oxaliplatin, 5-FU, and leucovorin chemotherapy for the previously treated patients with advanced gastric cancer. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.15138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
15138 Background: The effect of chemotherapy for advanced gastric cancer was disappointing. Most of patients have progressed after treatment of first line chemotherapy. So, many trials searching for effective combination chemotherapy to these patients are warranted. We conducted this study to ascertain the efficacy and toxicity of oxaliplatin, 5FU, and leucovorin combination chemotherapy for the previously treated patients with advanced gastric cancer. Methods: In all, 48 patients received course of oxaliplatin 100mg/m2 intravenously (i.v) for 2hour and leucovorin at 100mg/m2 intravenously (i.v) for 2hour on day 1, then 5FU 2.4 g/m2 i.v for 46 hour continuous infusion on day 1 and 2. This regimen was repeated every 2 weeks. Results: A total 220 courses were administered as second line (64.6%) and third line (29.2%), and median number of courses per patient was four. No complete response was reported and 7 partial responses (14.6%) were achieved, giving an overall disease stabilizing rate of 52.2% (95% Confidence interval, 37.85 % to 66.6%). The major toxicity was neutropenia, which reached grade 3/4 in 8 patients (16.7%). Median time to progression was 3 months (0.6 to 8 months), median survival duration was 8 months (0.5+ to 14.5 months), and median response duration was 3 months (1.6–4.3 months). Conclusions: We conclude that oxaliplatin, 5-FU, leucovorin combination chemotherapy for the treatment of previously treated advanced gastric cancer has a role for disease stabilizing and toxicity was tolerable to most of patients. No significant financial relationships to disclose.
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Affiliation(s)
- S. C. Oh
- Korea University, Seoul, Republic of Korea
| | - Y. Kim
- Korea University, Seoul, Republic of Korea
| | - J. Kim
- Korea University, Seoul, Republic of Korea
| | - I. Choi
- Korea University, Seoul, Republic of Korea
| | - H. Sung
- Korea University, Seoul, Republic of Korea
| | - H. Seo
- Korea University, Seoul, Republic of Korea
| | - S. Shin
- Korea University, Seoul, Republic of Korea
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Cho YK, Foley BT, Sung H, Kim YB, Kim JH. Molecular epidemiologic study of a human immunodeficiency virus 1 outbreak in haemophiliacs B infected through clotting factor 9 after 1990. Vox Sang 2007; 92:113-20. [PMID: 17298572 DOI: 10.1111/j.1423-0410.2006.00866.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND AND OBJECTIVES Twenty haemophiliacs were diagnosed as infected with human immunodeficiency virus 1 (HIV-1), 1 to 2 years after exposure to clotting factor 9 manufactured in Korea, beginning in early 1990. This study assessed the genetic relationships between viruses found in plasma donors and haemophiliacs. MATERIALS AND METHODS Sequencing of the nef and pol genes of viruses from infected haemophiliacs, plasma donors whose plasma was used in domestic clotting factor manufacture, haemophiliacs infected outside Korea, and local controls were determined by nested polymerase chain reactions and direct DNA sequencing. Phylogenetic analysis was used to investigate the relationships among the sequences. RESULTS Both plasma donors and the haemophiliacs were infected with a subclade of subtype B that is a founder effect lineage in Korea. CONCLUSION Our data indicate that HIV-1 transmission to 20 haemophiliacs occurred through intravenous injection of Korean-made clotting factor. SUMMARY A clotting factor made in Korea from blood from cash-paid donors infected at least 20 haemophiliacs with HIV-1 subtype B.
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Affiliation(s)
- Y K Cho
- Department of Microbiology, University of Ulsan College of Medicine, 388-1 Pungnap-dong, Seoul 138-040, South Korea.
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