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Bang HJ, Jeong WJ, Cha K, Oh SH, Park KN, Youn CS, Kim HJ, Lim JY, Kim HJ, Song H. A novel cardiac arrest severity score for the early prediction of hypoxic-ischemic brain injury and in-hospital death. Eur Heart J 2023. [DOI: 10.1093/eurheartj/ehac779.065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: None.
Background
Out-of-hospital cardiac arrest (OHCA) outcomes are unsatisfactory despite postcardiac arrest care. Early prediction of prognoses might help stratify patients and provide tailored therapy.
Purpose
In this study, we derived and validated a novel scoring system to predict hypoxic-ischaemic brain injury (HIBI) and in-hospital death (IHD).
Methods
We retrospectively analysed Korean Hypothermia Network prospective registry data collected from in Korea between 2015 and 2018. Patients without neuroprognostication data were excluded, and the remaining patients were randomly divided into derivation and validation cohorts. HIBI was defined when at least one prognostication predicted a poor outcome. IHD meant all deaths regardless of cause. In the derivation cohort, stepwise multivariate logistic regression was conducted for HIBI and IHD scores, and model performance was assessed. We then classified patients into four categories and analysed associations between the categories and cerebral performance categories (CPCs) at hospital discharge. Finally, we validated our models in the internal validation cohort.
Results
Among 1373 patients, 240 were excluded, and 1133 were randomised into derivation (n=754) and validation cohorts (n=379). In the derivation cohort, 7 and 8 predictors were selected for HIBI (0–8) and IHD scores (0–11), respectively, and the area under the curve (AUC) was 0.85 (95% CI 0.82–0.87) and 0.80 (95% CI 0.77–0.82), respectively. Applying optimum cutoff values of ≥6 points for HIBI and ≥7 points for IHD, patients were classified as follows: HIBI (-)/IHD (-), Category 1 (n=424); HIBI (-)/IHD (+), Category 2 (n=100); HIBI (+)/IHD (-), Category 3 (n=21); and HIBI (+)/IHD (+), Category 4 (n=209). CPCs at discharge were significantly different in each category (p<0.001). In the validation cohort, the model showed moderate discrimination (AUC 0.83, 95% CI 0.79–0.87 for HIBI and AUC 0.77, 95% CI 0.72–0.81 for IHD) with good calibration. Each category of the validation cohort showed a significant difference in discharge outcomes (p<0.001) and a similar trend to the derivation cohort.
Conclusions
We presented a novel approach for assessing illness severity after OHCA. Although external prospective studies are warranted, risk stratification for HIBI and IHD could help provide OHCA patients with appropriate treatment.
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Affiliation(s)
- H J Bang
- The Catholic University of Korea Seoul St. Mary's Hospital, Emergency medicine , Seoul , Korea (Republic of)
| | - W J Jeong
- St. Vincent's Hospital, Emergency medicine , Suwon , Korea (Democratic People's Republic of)
| | - K Cha
- St. Vincent's Hospital, Emergency medicine , Suwon , Korea (Democratic People's Republic of)
| | - S H Oh
- The Catholic University of Korea Seoul St. Mary's Hospital, Emergency medicine , Seoul , Korea (Republic of)
| | - K N Park
- The Catholic University of Korea Seoul St. Mary's Hospital, Emergency medicine , Seoul , Korea (Republic of)
| | - C S Youn
- The Catholic University of Korea Seoul St. Mary's Hospital, Emergency medicine , Seoul , Korea (Republic of)
| | - H J Kim
- The Catholic University of Korea Seoul St. Mary's Hospital, Emergency medicine , Seoul , Korea (Republic of)
| | - J Y Lim
- The Catholic University of Korea Seoul St. Mary's Hospital, Emergency medicine , Seoul , Korea (Republic of)
| | - H J Kim
- The Catholic University of Korea Seoul St. Mary's Hospital, Emergency medicine , Seoul , Korea (Republic of)
| | - H Song
- St. Vincent's Hospital, Emergency medicine , Suwon , Korea (Democratic People's Republic of)
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Lee KW, An YJ, Lee J, Jung YE, Ko IY, Jin J, Park JH, Lee WK, Cha K, Ko SSC, Lee JH, Yim HS. Expression and purification of intracrine human FGF 11 and study of its FGFR-dependent biological activity. J Microbiol 2022; 60:1086-1094. [PMID: 36318359 DOI: 10.1007/s12275-022-2406-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 09/29/2022] [Accepted: 09/29/2022] [Indexed: 06/16/2023]
Abstract
Fibroblast growth factor 11 (FGF11) is one of intracrine FGFs (iFGFs), which function within cells. Unlike canonical FGFs, FGF11 remains intracellularly and plays biological roles in FGF receptor (FGFR)-independent manner. Here, we established an expression system of recombinant FGF11 proteins in E. coli and investigated whether the extracellular administration of FGF11 can activate cellular signaling. Human FGF11 has two isoforms, FGF11a and FGF11b, depending on the presence of nuclear localization sequences (NLSs) in the N-terminus. Because these two isoforms are unstable, we prepared an FGF11a-Mut by substituting three cysteine residues in the NLS with serine and FGF11b-ΔC with C-terminal truncation. The introduction of mutation in the NLS improved the solubility of FGF11 prepared from E. coli. Exogenous addition of FGF11b and FGF11b-ΔC to BALB3T3 increased cell proliferation, while FGF11a-Mut exerted no effect. FGF11b-ΔC showed higher cell proliferation activity and FGFR signaling than FGF11b. The cell-proliferating activities of FGF11b and FGF11b-ΔC were blocked by an FGFR1 inhibitor or a recombinant FGFR1, confirming the FGFR1-dependent extracellular activity of FGF11b. The analysis of circular dichroism suggested that the C-terminus of FGF11 has an α-helical structure, which may affect its interaction with FGFR1. These results suggest that the N-and C-terminus of recombinant FGF11 are involved in the activation of FGFR1. The above results provide novel insights into the function and mechanism of FGF11 that may aid the development of useful ligands for FGFR regulation.
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Affiliation(s)
- Kyeong Won Lee
- Marine Biotechnology Research Center, Korea Institute of Ocean Science and Technology, Busan, 49111, Republic of Korea
| | - Young Jun An
- Marine Biotechnology Research Center, Korea Institute of Ocean Science and Technology, Busan, 49111, Republic of Korea
| | - Janet Lee
- Marine Biotechnology Research Center, Korea Institute of Ocean Science and Technology, Busan, 49111, Republic of Korea
| | - Ye-Eun Jung
- Department of Chemistry & Nanoscience, Ewha Womans University, Seoul, 03760, Republic of Korea
| | - In Young Ko
- New Drug Development Center, Osong Medical Innovation Foundation, Cheongju, 28160, Republic of Korea
| | - Jonghwa Jin
- New Drug Development Center, Osong Medical Innovation Foundation, Cheongju, 28160, Republic of Korea
| | - Ji Hoon Park
- New Drug Development Center, Osong Medical Innovation Foundation, Cheongju, 28160, Republic of Korea
| | - Won Kyu Lee
- New Drug Development Center, Osong Medical Innovation Foundation, Cheongju, 28160, Republic of Korea
| | - Kiweon Cha
- EHLBio, Uiwang, 16006, Republic of Korea
| | - Sun-Shin Cha Ko
- Department of Chemistry & Nanoscience, Ewha Womans University, Seoul, 03760, Republic of Korea
| | - Jung-Hyun Lee
- Marine Biotechnology Research Center, Korea Institute of Ocean Science and Technology, Busan, 49111, Republic of Korea.
- Department of Marine Biotechnology, Korea University of Science and Technology, Daejeon, 34113, Republic of Korea.
| | - Hyung-Soon Yim
- Marine Biotechnology Research Center, Korea Institute of Ocean Science and Technology, Busan, 49111, Republic of Korea.
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Silbernagel KM, Jechorek RP, Carver CN, Horter BL, Lindberg KG, Aleo V, Anderson G, Bannach B, Bulthaus M, Cha K, Dixon K, Hemming B, Horter B, Iannucci; M, Johnson A, Johnson K, Kaufer A, Kemp S, King J, Kupski B, Kusch S, Luebbert B, Lyke H, Makepeace; C, Otten N, Schomogy T, Strand S, Xiong C. 3M™ Petrifilm™ Staph Express Count Plate Method for the Enumeration of Staphylococcus aureus in Selected Dairy Foods: Collaborative Study. J AOAC Int 2019. [DOI: 10.1093/jaoac/86.5.963] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The 3M™ Petrifilm™ Staph Express Count plate method was compared with AOAC Official Method 975.55 for the enumeration of Staphylococcus aureus in selected foods. Five foods—ice cream, raw milk, yogurt, whey powder, and cheese—were analyzed for S. aureus by 12 collaborating laboratories. For each food tested, the collaborators received 8 blind test samples consisting of a control sample, a low inoculation level, a medium inoculation level, and a medium inoculation level with background flora, each in duplicate. The mean log10 counts for the methods were comparable for all 5 foods. The repeatability and reproducibility variances of the 24 h Petrifilm Staph Express Count plate method were similar to those of the 72 h standard method.
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Silbernagel KM, Lindberg KG, Ary M, Bannach B, Barbour M, Battista K, Bauten H, Beatty S, Bogar S, Buczek L, Bulthau M, Burnett T, Carver C, Cha K, Cooper L, D’Andrea L, Davis B, Fain A, Feiler B, Fender M, Hirt W, Iannucci M, Jackson JK, Jensen D, Johnson K, Julien-Davis G, Kempf A, Krone P, Kusch S, LaPointe A, Leiva BR, Lewandowski V, Lewis J, Maycock L, Mebs D, McCann T, Moulsoff M, Newcomer C, Ooya M, O’Shea P, Otten N, Reed J, Remes A, Resutek J, Rukamp B, Rukamp S, Saito A, Shafie A, Smith A, Tabatt J, Tanaka H, Torrance H, VandeVoort M, Wang D, Windsor S, Xiong Y, Zebchuck A. Petrifilm™ Rapid S. aureus Count Plate Method for Rapid Enumeration of Staphylococcus aureus in Selected Foods: Collaborative Study. J AOAC Int 2019. [DOI: 10.1093/jaoac/84.5.1431] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
A rehydratable dry-film plating method for Staphylococcus aureusin foods, the 3M™ Petrifilm™ Rapid S. aureus Count Plate method, was compared with AOAC® Official MethodSM 975.55 (Staphylococcus aureus in Foods). Nine foods—instant nonfat dried milk, dry seasoned vegetable coating, frozen hash browns, frozen cooked chicken patty, frozen ground raw pork, shredded cheddar cheese, fresh green beans, pasta filled with beef and cheese, and egg custard—were analyzed for S. aureus by 13 collaborating laboratories. For each food tested, the collaborators received 8 blind test samples consisting of a control sample and 3 levels of inoculated test sample, each in duplicate. The mean log counts for the methods were comparable for pasta filled with beef and cheese; frozen hash browns; cooked chicken patty; egg custard; frozen ground raw pork; and instant nonfat dried milk. The repeatability and reproducibility variances of the Petrifilm Rapid S. aureus Count Plate method were similar to those of the standard method.
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Cha K, Park J, Koo S, Kim T, Jun J, Byun J, Sunwoo J, Jung K. 0669 Thalamocortical Dysfunction In Patients With Idiopathic Restless Legs Syndrome (RLS) Suggested By Reduced Sleep Spindle Activity. Sleep 2018. [DOI: 10.1093/sleep/zsy061.668] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- K Cha
- Seoul National University Hospital, Seoul, KOREA, REPUBLIC OF
- Yonsei University, Wonju, KOREA, REPUBLIC OF
| | - J Park
- Seoul National University Hospital, Seoul, KOREA, REPUBLIC OF
| | - S Koo
- Seoul National University Hospital, Seoul, KOREA, REPUBLIC OF
| | - T Kim
- Seoul National University Hospital, Seoul, KOREA, REPUBLIC OF
| | - J Jun
- Seoul National University Hospital, Seoul, KOREA, REPUBLIC OF
| | - J Byun
- Kyung Hee University Hospital at Gangdong, Seoul, KOREA, REPUBLIC OF
| | - J Sunwoo
- Soonchunhyang University College of Medicine, Seoul, KOREA, REPUBLIC OF
| | - K Jung
- Seoul National University Hospital, Seoul, KOREA, REPUBLIC OF
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Kim T, Cha K, Jun J, Lim J, Byun J, Sunwoo J, Shin J, Han S, Joo E, Jung K. 0674 Intracerebral Sources of Periodic Leg Movement during Sleep. Sleep 2018. [DOI: 10.1093/sleep/zsy061.673] [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: 11/12/2022] Open
Affiliation(s)
- T Kim
- Seoul National University Hospital, Seoul, KOREA, REPUBLIC OF
| | - K Cha
- Seoul National University Hospital, Seoul, KOREA, REPUBLIC OF
| | - J Jun
- Seoul National University Hospital, Seoul, KOREA, REPUBLIC OF
| | - J Lim
- Department of Neurology, National Center for Mental Health, Seoul, KOREA, REPUBLIC OF
| | - J Byun
- 2Department of Neurology, Kyung Hee University Hospital at Gangdong, Seoul, KOREA, REPUBLIC OF
| | - J Sunwoo
- Department of Neurology, Soonchunhyang University Seoul Hospital, Seoul, KOREA, REPUBLIC OF
| | - J Shin
- Department of Neurology, CHA Bundang Medical Center, CHA University, Seongnam, KOREA, REPUBLIC OF
| | - S Han
- Department of Neurology, Wonkwang University Sanbon Hospital, Gunpo, KOREA, REPUBLIC OF
| | - E Joo
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, KOREA, REPUBLIC OF
| | - K Jung
- Seoul National University Hospital, Seoul, KOREA, REPUBLIC OF
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Jun J, Kim M, Kim T, Cha K, Kim H, Koo S, Jung K. 0671 Effects Of Short-interval And Isolated Leg Movements In Sleep On RLS Severity And Sleep Quality In Patients With RLS. Sleep 2018. [DOI: 10.1093/sleep/zsy061.670] [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: 11/12/2022] Open
Affiliation(s)
- J Jun
- Seoul National Universitiy Hospital, Seoul, KOREA, REPUBLIC OF
| | - M Kim
- Seoul National University Hospital, Seoul, KOREA, REPUBLIC OF
| | - T Kim
- Seoul National University Hospital, Seoul, KOREA, REPUBLIC OF
| | - K Cha
- Seoul National University Hospital, Seoul, KOREA, REPUBLIC OF
| | - H Kim
- Seoul National University Hospital, Seoul, KOREA, REPUBLIC OF
| | - S Koo
- Seoul National University Hospital, Seoul, KOREA, REPUBLIC OF
| | - K Jung
- Seoul National University Hospital, Seoul, KOREA, REPUBLIC OF
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Kim TK, Park CS, Jang J, Kim MR, Na HJ, Lee K, Kim HJ, Heo K, Yoo BC, Kim YM, Lee JW, Kim SJ, Kim ES, Kim DY, Cha K, Lee TG, Lee S. Inhibition of VEGF-dependent angiogenesis and tumor angiogenesis by an optimized antibody targeting CLEC14a. Mol Oncol 2018; 12:356-372. [PMID: 29316206 PMCID: PMC5830631 DOI: 10.1002/1878-0261.12169] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 12/01/2017] [Accepted: 12/03/2017] [Indexed: 12/12/2022] Open
Abstract
The C‐type lectin‐like domain of CLEC14a (CLEC14a‐C‐type lectin‐like domain [CTLD]) is a key domain that mediates endothelial cell–cell contacts in angiogenesis. However, the role of CLEC14a‐CTLD in pathological angiogenesis has not yet been clearly elucidated. In this study, through complementarity‐determining region grafting, consecutive deglycosylation, and functional isolation, we generated a novel anti‐angiogenic human monoclonal antibody that specifically targets CLEC14a‐CTLD and that shows improved stability and homogeneity relative to the parental antibody. We found that this antibody directly inhibits CLEC14a‐CTLD‐mediated endothelial cell–cell contact and simultaneously downregulates expression of CLEC14a on the surface of endothelial cells. Using various in vitro and in vivo functional assays, we demonstrated that this antibody effectively suppresses vascular endothelial growth factor (VEGF)‐dependent angiogenesis and tumor angiogenesis of SNU182 human hepatocellular carcinoma, CFPAC‐1 human pancreatic cancer, and U87 human glioma cells. Furthermore, we also found that this antibody significantly inhibits tumor angiogenesis of HCT116 and bevacizumab‐adapted HCT116 human colorectal cancer cells. These findings suggest that antibody targeting of CLEC14a‐CTLD has the potential to suppress VEGF‐dependent angiogenesis and tumor angiogenesis and that CLEC14a‐CTLD may be a novel anti‐angiogenic target for VEGF‐dependent angiogenesis and tumor angiogenesis.
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Affiliation(s)
- Taek-Keun Kim
- Scripps Korea Antibody Institute, Chuncheon, South Korea
| | - Chang Sik Park
- Scripps Korea Antibody Institute, Chuncheon, South Korea
| | - Jihye Jang
- Scripps Korea Antibody Institute, Chuncheon, South Korea
| | - Mi Ra Kim
- Scripps Korea Antibody Institute, Chuncheon, South Korea
| | - Hee-Jun Na
- Scripps Korea Antibody Institute, Chuncheon, South Korea
| | - Kangseung Lee
- Scripps Korea Antibody Institute, Chuncheon, South Korea
| | - Hyun Jung Kim
- Research Institute, National Cancer Center, Goyang, South Korea
| | - Kyun Heo
- Research Institute, National Cancer Center, Goyang, South Korea
| | - Byong Chul Yoo
- Research Institute, National Cancer Center, Goyang, South Korea
| | - Young-Myeong Kim
- Department of Molecular and Cellular Biochemistry, Kangwon National University, Chuncheon, South Korea
| | - Je-Wook Lee
- New Drug Development Center, Osong Medical Innovation Foundation, South Korea
| | - Su Jin Kim
- New Drug Development Center, Osong Medical Innovation Foundation, South Korea
| | - Eun Sung Kim
- New Drug Development Center, Osong Medical Innovation Foundation, South Korea
| | - Dae Young Kim
- New Drug Development Center, Osong Medical Innovation Foundation, South Korea
| | - Kiweon Cha
- New Drug Development Center, Osong Medical Innovation Foundation, South Korea
| | - Tae Gyu Lee
- New Drug Development Center, Osong Medical Innovation Foundation, South Korea
| | - Sukmook Lee
- Scripps Korea Antibody Institute, Chuncheon, South Korea
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Gao R, Ko J, Cha K, Jeon JH, Rhie GE, Choi J, deMello AJ, Choo J. Fast and sensitive detection of an anthrax biomarker using SERS-based solenoid microfluidic sensor. Biosens Bioelectron 2015; 72:230-6. [PMID: 25985198 DOI: 10.1016/j.bios.2015.05.005] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [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: 03/03/2015] [Revised: 04/30/2015] [Accepted: 05/04/2015] [Indexed: 02/03/2023]
Abstract
We report the application of a fully automated surface-enhanced Raman scattering (SERS)-based solenoid-embedded microfluidic device to the quantitative and sensitive detection of anthrax biomarker poly-γ-D-glutamic acid (PGA) in solution. Analysis is based on the competitive reaction between PGA and PGA-conjugated gold nanoparticles with anti-PGA-immobilized magnetic beads within a microfluidic environment. Magnetic immunocomplexes are trapped by yoke-type solenoids embedded within the device, and their SERS signals were directly measured and analyzed. To improve the accuracy of measurement process, external standard values for PGA-free serum were also measured through use of a control channel. This additional measurement greatly improves the reliability of the assay by minimizing the influence of extraneous experimental variables. The limit of detection (LOD) of PGA in serum, determined by our SERS-based microfluidic sensor, is estimated to be 100 pg/mL. We believe that the defined method represents a valuable analytical tool for the detection of anthrax-related aqueous samples.
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Affiliation(s)
- Rongke Gao
- Department of Bionano Technology, Hanyang University, Ansan 426-791, South Korea
| | - Juhui Ko
- Department of Bionano Technology, Hanyang University, Ansan 426-791, South Korea
| | - Kiweon Cha
- Division of High-Risk Pathogen Research, Center for Infectious Diseases, National Institute of Health, Cheongju 363-951, South Korea
| | - Jun Ho Jeon
- Division of High-Risk Pathogen Research, Center for Infectious Diseases, National Institute of Health, Cheongju 363-951, South Korea
| | - Gi-eun Rhie
- Division of High-Risk Pathogen Research, Center for Infectious Diseases, National Institute of Health, Cheongju 363-951, South Korea
| | - Jonghoon Choi
- Department of Bionano Technology, Hanyang University, Ansan 426-791, South Korea
| | - Andrew J deMello
- Department of Chemistry and Applied Biosciences, Institute of Chemical and Bioengineering, ETH Zürich, Vladimir Prelog Weg 1, 8093 Zürich, Switzerland.
| | - Jaebum Choo
- Department of Bionano Technology, Hanyang University, Ansan 426-791, South Korea.
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Kim YJ, Kim JH, Lee KJ, Choi MM, Kim YH, Rhie GE, Yoo CK, Cha K, Shin NR. Botulinum neurotoxin type A induces TLR2-mediated inflammatory responses in macrophages. PLoS One 2015; 10:e0120840. [PMID: 25853816 PMCID: PMC4390353 DOI: 10.1371/journal.pone.0120840] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Accepted: 02/10/2015] [Indexed: 01/16/2023] Open
Abstract
Botulinum neurotoxin type A (BoNT/A) is the most potent protein toxin and causes fatal flaccid muscle paralysis by blocking neurotransmission. Application of BoNT/A has been extended to the fields of therapeutics and biodefense. Nevertheless, the global response of host immune cells to authentic BoNT/A has not been reported. Employing microarray analysis, we performed global transcriptional profiling of RAW264.7 cells, a murine alveolar macrophage cell line. We identified 70 genes that were modulated following 1 nM BoNT/A treatment. The altered genes were mainly involved in signal transduction, immunity and defense, protein metabolism and modification, neuronal activities, intracellular protein trafficking, and muscle contraction. Microarray data were validated with real-time RT-PCR for seven selected genes including tlr2, tnf, inos, ccl4, slpi, stx11, and irg1. Proinflammatory mediators such as nitric oxide (NO) and tumor necrosis factor alpha (TNFα) were induced in a dose-dependent manner in BoNT/A-stimulated RAW264.7 cells. Increased expression of these factors was inhibited by monoclonal anti-Toll-like receptor 2 (TLR2) and inhibitors specific to intracellular proteins such as c-Jun N-terminal kinase (JNK), extracellular signal-regulated kinase (ERK), and p38 mitogen-activated protein kinase (MAPK). BoNT/A also suppressed lipopolysaccharide-induced NO and TNFα production from RAW264.7 macrophages at the transcription level by blocking activation of JNK, ERK, and p38 MAPK. As confirmed by TLR2-/- knock out experiments, these results suggest that BoNT/A induces global gene expression changes in host immune cells and that host responses to BoNT/A proceed through a TLR2-dependent pathway, which is modulated by JNK, ERK, and p38 MAPK.
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Affiliation(s)
- Yun Jeong Kim
- Division of High-risk Pathogen Research, Center for Infectious Diseases, Korea National Institute of Health, Korea Centers for Disease Control and Prevention, Cheongju, Korea
| | - Jeong-Hee Kim
- Division of High-risk Pathogen Research, Center for Infectious Diseases, Korea National Institute of Health, Korea Centers for Disease Control and Prevention, Cheongju, Korea
| | - Kwang-Jun Lee
- Division of High-risk Pathogen Research, Center for Infectious Diseases, Korea National Institute of Health, Korea Centers for Disease Control and Prevention, Cheongju, Korea
| | - Myung-Min Choi
- Division of High-risk Pathogen Research, Center for Infectious Diseases, Korea National Institute of Health, Korea Centers for Disease Control and Prevention, Cheongju, Korea
| | - Yeon Hee Kim
- Division of High-risk Pathogen Research, Center for Infectious Diseases, Korea National Institute of Health, Korea Centers for Disease Control and Prevention, Cheongju, Korea
| | - Gi-eun Rhie
- Division of High-risk Pathogen Research, Center for Infectious Diseases, Korea National Institute of Health, Korea Centers for Disease Control and Prevention, Cheongju, Korea
| | - Cheon-Kwon Yoo
- Division of High-risk Pathogen Research, Center for Infectious Diseases, Korea National Institute of Health, Korea Centers for Disease Control and Prevention, Cheongju, Korea
| | - Kiweon Cha
- Division of High-risk Pathogen Research, Center for Infectious Diseases, Korea National Institute of Health, Korea Centers for Disease Control and Prevention, Cheongju, Korea
| | - Na-Ri Shin
- Division of High-risk Pathogen Research, Center for Infectious Diseases, Korea National Institute of Health, Korea Centers for Disease Control and Prevention, Cheongju, Korea
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Kim S, Bae SM, Seo J, Cha K, Piao M, Kim SJ, Son HN, Park RW, Lee BH, Kim IS. Advantages of the phosphatidylserine-recognizing peptide PSP1 for molecular imaging of tumor apoptosis compared with annexin V. PLoS One 2015; 10:e0121171. [PMID: 25803297 PMCID: PMC4372538 DOI: 10.1371/journal.pone.0121171] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Accepted: 01/28/2015] [Indexed: 12/19/2022] Open
Abstract
A number of peptide-based indicators have been identified and reported as potential apoptosis probes, offering great promise for early assessment of therapeutic efficacy in several types of cancer. Direct comparison of the newly developed probes with previously used ones would be an important step in assessing possible applications. Here, we compared the newly identified peptide-based phosphatidylserine (PS) indicator PSP1 (CLSYYPSYC) with annexin V, a common probe for molecular imaging of apoptotic cells, with respect to PS binding kinetics, apoptotic cell-targeting ability, and the efficacy of homing to apoptotic tumor cells in a mouse model after treatment with the anticancer agent camptothecin. Our results indicate that PSP1 efficiently targeted apoptotic cells and generated apoptosis/tumor-specific signals after cancer treatment in the animal model, whereas a similar dose of annexin V showed weak signals. The formation of a stable complex of PSP1 with PS might be one reason for the efficient in vivo targeting. We suggest that PSP1 has potential advantages for in vivo apoptotic cell imaging and could serve as a platform for the development of de novo peptide-based probes for apoptosis.
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Affiliation(s)
- Soyoun Kim
- Department of Biochemistry and Cell Biology, Cell and Matrix Research Institute, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Sang Mun Bae
- Department of Biochemistry and Cell Biology, Cell and Matrix Research Institute, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Junyoung Seo
- Department of Biochemistry and Cell Biology, Cell and Matrix Research Institute, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Kiweon Cha
- Division of high-risk pathogen research, Korea National Institute of Health, Korea Centers For Disease Control & Prevention (KCDC), Osong, Chungbuk, Republic of Korea
| | - Meilan Piao
- Department of Biochemistry and Cell Biology, Cell and Matrix Research Institute, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Sun-Ji Kim
- Department of Biochemistry and Cell Biology, Cell and Matrix Research Institute, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Hye-Nam Son
- Department of Biochemistry and Cell Biology, Cell and Matrix Research Institute, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Rang-Woon Park
- Department of Biochemistry and Cell Biology, Cell and Matrix Research Institute, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Byung-Heon Lee
- Department of Biochemistry and Cell Biology, Cell and Matrix Research Institute, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - In-San Kim
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology, Seoul, Republic of Korea
- * E-mail:
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Choi J, Yang ES, Cha K, Whang J, Choi WJ, Avraham S, Kim TA. The Nuclear Matrix Protein, NRP/B, Acts as a Transcriptional Repressor of E2F-mediated Transcriptional Activity. J Cancer Prev 2014; 19:187-98. [PMID: 25337588 PMCID: PMC4189505 DOI: 10.15430/jcp.2014.19.3.187] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [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: 08/16/2014] [Revised: 08/29/2014] [Accepted: 08/29/2014] [Indexed: 12/12/2022] Open
Abstract
Background: NRP/B, a family member of the BTB/Kelch repeat proteins, is implicated in neuronal and cancer development, as well as the regulation of oxidative stress responses in breast and brain cancer. Our previous studies indicate that the NRP/B-BTB/POZ domain is involved in the dimerization of NRP/B and in a complex formation with the tumor suppressor, retinoblastoma protein. Although much evidence supports the potential role of NRP/B as a tumor suppressor, the molecular mechanisms of NRP/B action on E2F transcription factors have not been elucidated. Methods: Three-dimensional modeling of NRP/B was used to generate point mutations in the BTB/Kelch domains. Tet-on inducible NRP/B expression was established. The NRP/B deficient breast cancer cell line, MDA-MB-231, was generated using lentiviral shNRP/B to evaluate the effect of NRP/B on cell proliferation, invasion and migration. Immunoprecipitation was performed to verify the interaction of NRP/B with E2F and histone deacetylase (HDAC-1), and the expression level of NRP/B protein was analyzed by Western blot analysis. Changes in cell cycle were determined by flow cytometry. Transcriptional activities of E2F transcription factors were measured by chloramphenicol acetyltransferase (CAT) activity. Results: Ectopic overexpression of NRP/B demonstrated that the NRP/B-BTB/POZ domain plays a critical role in E2F-mediated transcriptional activity. Point mutations within the BTB/POZ domain restored E2-promoter activity inhibited by NRP/B. Loss of NRP/B enhanced the proliferation and migration of breast cancer cells. Endogenous NRP/B interacted with E2F and HDAC1. Treatement with an HDAC inhibitor, trichostatin A (TSA), abolished the NRP/B-mediated suppression of E2-promoter activity. Gain or loss of NRP/B in HeLa cells confirmed the transcriptional repressive capability of NRP/B on the E2F target genes, Cyclin E and HsORC (Homo sapiens Origin Recognition Complex). Conclusions: The present study shows that NRP/B acts as a transcriptional repressor by interacting with the co-repressors, HDAC1, providing new insight into the molecular mechanisms of NRP/B on tumor suppression.
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Affiliation(s)
- Jina Choi
- CHA Cancer Institute, CHA University, Seoul, Korea
| | - Eun Sung Yang
- Cancer Cell Biology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Kiweon Cha
- Division of Experimental Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - John Whang
- Cancer Cell Biology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | | | - Shalom Avraham
- Division of Experimental Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Tae-Aug Kim
- CHA Cancer Institute, CHA University, Seoul, Korea ; Cancer Cell Biology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
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Kim YH, Kim KA, Kim YR, Choi MK, Kim HK, Choi KJ, Chun JH, Cha K, Hong KJ, Lee NG, Yoo CK, Oh HB, Kim TS, Rhie GE. Immunoproteomically identified GBAA_0345, alkyl hydroperoxide reductase subunit C is a potential target for multivalent anthrax vaccine. Proteomics 2014; 14:93-104. [PMID: 24273028 DOI: 10.1002/pmic.201200495] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2012] [Revised: 10/04/2013] [Accepted: 10/30/2013] [Indexed: 01/10/2023]
Abstract
Anthrax is caused by the spore-forming bacterium Bacillus anthracis, which has been used as a weapon for bioterrorism. Although current vaccines are effective, they involve prolonged dose regimens and often cause adverse reactions. High rates of mortality associated with anthrax have made the development of an improved vaccine a top priority. To identify novel vaccine candidates, we applied an immunoproteomics approach. Using sera from convalescent guinea pigs or from human patients with anthrax, we identified 34 immunogenic proteins from the virulent B. anthracis H9401. To evaluate vaccine candidates, six were expressed as recombinant proteins and tested in vivo. Two proteins, rGBAA_0345 (alkyl hydroperoxide reductase subunit C) and rGBAA_3990 (malonyl CoA-acyl carrier protein transacylase), have afforded guinea pigs partial protection from a subsequent virulent-spore challenge. Moreover, combined vaccination with rGBAA_0345 and rPA (protective antigen) exhibited an enhanced ability to protect against anthrax mortality. Finally, we demonstrated that GBAA_0345 localizes to anthrax spores and bacilli. Our results indicate that rGBAA_0345 may be a potential component of a multivalent anthrax vaccine, as it enhances the efficacy of rPA vaccination. This is the first time that sera from patients with anthrax have been used to interrogate the proteome of virulent B. anthracis vegetative cells.
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Affiliation(s)
- Yeon Hee Kim
- Division of High-risk Pathogen Research, Korea National Institute of Health, Chungbuk, Republic of Korea; School of Life Sciences and Biotechnology, Korea University, Seoul, Republic of Korea
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Chae H, Cha K, Kim M, Kim Y, Min CK. Evaluation of the heavy/light-chain assay for the diagnosis and monitoring of multiple myeloma. Int J Lab Hematol 2013; 35:e10-2. [DOI: 10.1111/ijlh.12050] [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: 11/28/2022]
Affiliation(s)
- H. Chae
- Department of Laboratory Medicine; College of Medicine; The Catholic University of Korea; Seoul Korea
- Catholic Laboratory Development and Evaluation Center; College of Medicine; The Catholic University of Korea; Seoul Korea
| | - K. Cha
- Department of Laboratory Medicine; College of Medicine; The Catholic University of Korea; Seoul Korea
- Catholic Laboratory Development and Evaluation Center; College of Medicine; The Catholic University of Korea; Seoul Korea
| | - M. Kim
- Department of Laboratory Medicine; College of Medicine; The Catholic University of Korea; Seoul Korea
- Catholic Laboratory Development and Evaluation Center; College of Medicine; The Catholic University of Korea; Seoul Korea
| | - Y. Kim
- Department of Laboratory Medicine; College of Medicine; The Catholic University of Korea; Seoul Korea
- Catholic Laboratory Development and Evaluation Center; College of Medicine; The Catholic University of Korea; Seoul Korea
| | - C. K. Min
- Division of Hematology; Department of Internal Medicine; Catholic Blood and Marrow Transplantation Center; College of Medicine; The Catholic University of Korea; Seoul Korea
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Jeon JO, Kim S, Choi E, Shin K, Cha K, So IS, Kim SJ, Jun E, Kim D, Ahn HJ, Lee BH, Lee SH, Kim IS. Designed nanocage displaying ligand-specific Peptide bunches for high affinity and biological activity. ACS Nano 2013; 7:7462-71. [PMID: 23927443 DOI: 10.1021/nn403184u] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Protein-cage nanoparticles are promising multifunctional platforms for targeted delivery of imaging and therapeutic agents owing to their biocompatibility, biodegradability, and low toxicity. The major advantage of protein-cage nanoparticles is the ability to decorate their surfaces with multiple functionalities through genetic and chemical modification to achieve desired properties for therapeutic and/or diagnostic purposes. Specific peptides identified by phage display can be genetically fused onto the surface of cage proteins to promote the association of nanoparticles with a particular cell type or tissue. Upon symmetrical assembly of the cage, peptides are clustered on the surface of the cage protein in bunches. The resulting PBNC (peptide bunches on nanocage) offers the potential of synergistically increasing the avidity of the peptide ligands, thereby enhancing their blocking ability for therapeutic purposes. Here, we demonstrated a proof-of-principle of PBNCs, fusing the interleukin-4 receptor (IL-4R)-targeting peptide, AP-1, identified previously by phage display, with ferritin-L-chain (FTL), which undergoes 24-subunit assembly to form highly stable AP-1-containing nanocage proteins (AP1-PBNCs). AP1-PBNCs bound specifically to the IL-4R-expressing cell line, A549, and their binding and internalization were specifically blocked by anti-IL-4R antibody. AP1-PBNCs exhibited dramatically enhanced binding avidity to IL-4R compared with AP-1 peptide, measured by surface plasmon resonance spectroscopy. Furthermore, treatment with AP1-PBNCs in a murine model of experimental asthma diminished airway hyper-responsiveness and eosinophilic airway inflammation along with decreased mucus hyperproduction. These findings hold great promise for the application of various PBNCs with ligand-specific peptides in therapeutics for different diseases, such as cancer.
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Affiliation(s)
- Jae Og Jeon
- Department of Biochemistry and Cell Biology, Cell and Matrix Research Institute, School of Medicine, Kyungpook National University , Daegu 700-422, Republic of Korea
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Jang J, Cho M, Lee HR, Cha K, Chun JH, Hong KJ, Park J, Rhie GE. Monoclonal antibody against the poly-gamma-D-glutamic acid capsule of Bacillus anthracis protects mice from enhanced lethal toxin activity due to capsule and anthrax spore challenge. Biochim Biophys Acta Gen Subj 2013. [PMID: 23201204 DOI: 10.1016/j.bbagen.2012.11.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
BACKGROUND The poly-gamma-D-glutamic acid (PGA) capsule, a major virulence factor of Bacillus anthracis, protects bacilli from immune surveillance and allows its unimpeded growth in the host. Recently, the importance of the PGA in the pathogenesis of anthrax infection has been reported. The PGA capsule is associated with lethal toxin (LT) in the blood of experimentally infected animals and enhances the cytotoxicity of LT. METHODS To investigate the role of anti-PGA Abs on progression of anthrax infection, two mouse anti-PGA mAbs with K(d) values of 0.8 microM and 2.6 microM respectively were produced and in silico three dimensional (3D) models of mAbs with their cognitive PGA antigen complex were analyzed. RESULTS Anti-PGA mAbs specifically bound encapsulated B. anthracis H9401 and showed opsonophagocytosis activity against the bacteria with complement. The enhancement effect of PGA on LT-mediated cytotoxicity was confirmed ex vivo using mouse bone marrow-derived macrophages and was effectively inhibited by anti-PGA mAb. Passive immunization of mAb completely protected mice from PGA-enhanced LT toxicity and partially rescued mice from anthrax spore challenges. 3D structure models of these mAbs and PGA complex support specific interactions between CDR and cognitive PGA. These results indicate that mouse mAb against PGA capsule prevents the progress of anthrax disease not only by eliminating the vegetative form of encapsulated B. anthracis but also by inhibiting the enhanced cytotoxic activity of LT by PGA through specific binding with PGA capsule antigen. GENERAL SIGNIFICANCE Our results suggest a potential role for PGA antibodies in preventing and treating anthrax infection.
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Affiliation(s)
- Jeyoun Jang
- Division of High-Risk Pathogen Research, Center for Infectious Diseases, National Institute of Health, 187 Osongsaengmyeong2-ro, Cheongwon-gun, Chungbuk 363-951, Republic of Korea
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Nam JO, Son HN, Jun E, Cha K, Lee BH, Park RW, Kim IS. FAS1 domain protein inhibits VEGF165-induced angiogenesis by targeting the interaction between VEGFR-2 and αvβ3 integrin. Mol Cancer Res 2012; 10:1010-20. [PMID: 22710795 DOI: 10.1158/1541-7786.mcr-11-0600] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [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
It is known that VEGF receptors (VEGFR) and integrins interact with each other to regulate angiogenesis. We reported previously that the fasciclin 1 (FAS1) domain-containing protein, TGFBIp/βig-h3 (TGF-β-induced protein) is an angiogenesis regulator that inhibits both endothelial cell migration and growth via αvβ3 integrin. In an attempt to target the interaction between VEGFR-2 and αvβ3 integrin, we determined whether the FAS1 domain region of TGFBIp/βig-h3 (FAS1 domain protein) can block the interaction between the two receptors, leading to the suppression of angiogenesis. In this study, we showed that FAS1 domain protein inhibits VEGF165-induced endothelial cell proliferation and migration via αvβ3 integrin, resulting in the inhibition of VEGF165-induced angiogenesis. We also defined a molecular mechanism by which FAS1 domain protein blocks the association between αvβ3 integrin and VEGFR-2, showing that it binds to αvβ3 integrin but not to VEGFR-2. Blocking the association of these major angiogenic receptors with FAS1 domain protein inhibits signaling pathways downstream of VEGFR-2. Collectively, our results indicate that FAS1 domain protein, in addition to its inhibitory effect on αvβ3 integrin-mediated angiogenesis, also inhibits VEGF165-induced angiogenesis. Thus, FAS1 domain protein can be further developed into a potent anticancer drug that targets two principal angiogenic pathways.
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Affiliation(s)
- Ju-Ock Nam
- Department of Ecological Environment Conservation, Kyungpook National University, Gyeongsangbuk-do, Seoul, Korea
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Cha K, Kim H, Hwang S, Park D, Lee K. 83: Cerebral Hemorrhage and Aortic Dissection for Differential Diagnosis of Non-Traumatic Out-of-Hospital Cardiac Arrest. Ann Emerg Med 2010. [DOI: 10.1016/j.annemergmed.2010.06.126] [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: 11/27/2022]
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Lee E, Cha K, Deasy J, Hamilton C. SU-GG-T-128: Handling Multiple Clinical Objectives in Intensity-Modulated Radiation Therapy Treatment Planning. Med Phys 2010. [DOI: 10.1118/1.3468517] [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: 11/07/2022] Open
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Won EY, Cha K, Byun JS, Kim DU, Shin S, Ahn B, Kim YH, Rice AJ, Walz T, Kwon BS, Cho HS. The structure of the trimer of human 4-1BB ligand is unique among members of the tumor necrosis factor superfamily. J Biol Chem 2009; 285:9202-10. [PMID: 20032458 DOI: 10.1074/jbc.m109.084442] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Binding of the 4-1BB ligand (4-1BBL) to its receptor, 4-1BB, provides the T lymphocyte with co-stimulatory signals for survival, proliferation, and differentiation. Importantly, the 4-1BB-4-1BBL pathway is a well known target for anti-cancer immunotherapy. Here we present the 2.3-A crystal structure of the extracellular domain of human 4-1BBL. The ectodomain forms a homotrimer with an extended, three-bladed propeller structure that differs from trimers formed by other members of the tumor necrosis factor (TNF) superfamily. Based on the 4-1BBL structure, we modeled its complex with 4-1BB, which was consistent with images obtained by electron microscopy, and verified the binding site by site-directed mutagenesis. This structural information will facilitate the development of immunotherapeutics targeting 4-1BB.
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Affiliation(s)
- Eun-Young Won
- Department of Biology, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Korea
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Lee E, Cha K, Zaider M. SU-FF-T-47: Automated Planning Volume Definition for HDR Brachytherapy: Application to Intraluminal Treatment of the Bile Duct. Med Phys 2009. [DOI: 10.1118/1.3181519] [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: 11/07/2022] Open
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Lee E, Cha K. SU-FF-T-83: An Image-Guided Adaptive Treatment Planning Optimization for IMRT. Med Phys 2009. [DOI: 10.1118/1.3181556] [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: 11/07/2022] Open
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Choi H, Kim H, Kim O, Park K, Cha K, Kim S, Lee K, Hwang S. 331: The Risk Factors for Mortality in Organophosphate Poisoning. Ann Emerg Med 2008. [DOI: 10.1016/j.annemergmed.2008.06.357] [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]
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Kang SH, Chang KH, Ohcho S, Lee HY, Cha K, Moon SK, Andalibi A, Lim DJ. Expression of water channel proteins (aquaporins) in the rat Eustachian tube and middle ear mucosa. Acta Otolaryngol 2007; 127:687-92. [PMID: 17573563 DOI: 10.1080/00016480500452574] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
CONCLUSION Diverse expression of the different subtypes of aquaporins in different parts of the Eustachian tube and middle ear suggests region-specific functions of the aquaporins in the normal physiology of the tubotympanum and also suggests that they may play roles in the pathophysiology of otitis media. OBJECTIVES The epithelial cells of the middle ear and Eustachian tube must maintain adequate water balance for normal function of the mucociliary system. Since aquaporins (AQPs) are known to play critical roles in water homeostasis, we investigated their expression in the tubotympanum of the rat. METHODS The expression of AQP subtypes 1, 2, 4, 5, and 7 were examined in the rat Eustachian tube and middle ear using RT-PCR, Western blotting, and immunohistochemistry. RESULTS Transcripts for AQP 1, 4, and 5 were detected in the Eustachian tube and middle ear. Expression of these molecules at the protein level was confirmed by Western blot analysis. Immunohistochemical analysis demonstrated that AQP 4 was localized to the basolateral membranes of ciliated epithelial cells while AQP 5 was localized to the apical surface of serous gland cells, but not goblet cells, in the rat Eustachian tube. AQP 1 was found to be expressed by the subepithelial fibroblasts.
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Affiliation(s)
- Sung-Ho Kang
- Gonda Department of Cell and Molecular Biology, House Ear Institute, Los Angeles, CA 90057, USA
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Lee E, Cha K, Bortfeld T, Deasy J. MO-D-M100J-05: Robust Optimization to Accommodate Effects of Systematic Treatment Uncertainties. Med Phys 2007. [DOI: 10.1118/1.2761247] [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: 11/07/2022] Open
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Fucaloro AF, Pu Y, Cha K, Williams A, Conrad K. Partial Molar Volumes and Refractions of Aqueous Solutions of Fructose, Glucose, Mannose, and Sucrose at 15.00, 20.00, and 25.00 °C. J SOLUTION CHEM 2006. [DOI: 10.1007/s10953-006-9100-7] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.3] [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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Seo J, Parks J, Eum J, Yoon T, Cha K, Lee D. P-196. Fertil Steril 2006. [DOI: 10.1016/j.fertnstert.2006.07.546] [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: 10/24/2022]
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Park E, Lee D, Cho J, Han J, Cha K, Yoon T. P-103. Fertil Steril 2006. [DOI: 10.1016/j.fertnstert.2006.07.448] [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: 10/24/2022]
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Abstract
It is perhaps rare to encounter among the various immunologically competent receptor-ligand pairs that a single cell surface determinant unleashes both a hidden suppressive function and costimulation. 4-1BB, an activation-induced tumor necrosis factor receptor family member chiefly viewed as a powerful T-cell costimulatory molecule, is one such example. Accumulated evidence in recent years uncovered an unknown facet of in vivo 4-1BB signaling (i.e., "active suppression"). Although in vitro signaling via 4-1BB is shown to support both CD4(+) and CD8(+) T-cell responses, the same induces a predominant CD8(+) T-cell response suppressing CD4(+) T-cell function when applied in vivo. How, when, and why such dual immunoregulatory effect of anti-4-1BB monoclonal antibody (MAB) comes into play is currently the focus of intense research. Existing data, although not complete, uncover several important aspects of in vivo 4-1BB signaling in the amelioration or exacerbation of various immune disorders. Despite minor disagreements, a majority agree that upregulation of interferon (IFN)-gamma is critical to anti-4-1BB MAB therapy in addition to immune modulators such as interleukin 2, transforming growth factor beta, and indolamine 2,3-dioxygenase(5), all of which contribute greatly to the success of anti-4-1BB MAB-based immunotherapy. Anti-4-1BB MAB-mediated expansion of novel CD11c(+)CD8(+) T cells is additional weaponry that appears critical for its in vivo suppressive function. These CD11c(+)CD8(+) T cells express high levels of IFN-gamma, become effective killers, and mediate selective suppression of CD4(+) T cells. In this review, we discuss the dual nature (costimulatory and suppressive) of 4-1BB-mediated immune regulation, its current status, future direction, and its impact on the immune system, with special reference to its immunotherapy.
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Affiliation(s)
- Dass S Vinay
- LSU Eye Center, Louisiana State University Health Sciences Center School of Medicine, Suite B, 2020 Gravier Street, New Orleans, LA 70112, USA
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Lee E, Lewis D, Cha K. SU-FF-T-207: Efficient IMRT Delivery - Fast Generation of Integer-Valued Beam Profiles. Med Phys 2006. [DOI: 10.1118/1.2241129] [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: 11/07/2022] Open
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Abstract
CONCLUSION Spiral ligament fibrocytes (SLFs) may be involved in the innate immune response of the inner ear by producing chemoattractants for recruiting inflammatory cells such as neutrophils and monocytes. OBJECTIVE The purpose of this study was to investigate the cellular responses of SLFs when challenged by inflammatory stimuli such as components of otitis media pathogens or proinflammatory cytokines. MATERIALS AND METHODS To detect released inflammatory cytokines and chemokines, cells were treated for 48 h with whole lysates of nontypable Haemophilus influenzae (NTHi), Streptococcus pneumoniae, or with interleukin 1 alpha (IL-1alpha). The culture medium was then collected and applied to protein arrays. To compare mRNA levels of chemokines, total RNA was extracted after 3 h of treatment with the above agents, and quantitative real-time PCR was performed. RESULTS Protein array analysis showed that in response to NTHi or S. pneumoniae, rat SLFs released monocyte chemotactic protein 1, macrophage inflammatory protein 3 alpha, TNF-alpha, and cytokine-induced neutrophil chemoattractant 2 and 3. Treatment with IL-1alpha, on the other hand, resulted in release of MCP-1 but not the other molecules. Tissue inhibitor of metalloproteinase 1 and vascular endothelial growth factor were released regardless of the inflammatory stimulus used.
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Affiliation(s)
- Sung-Kyun Moon
- Department of Gonda Cell and Molecular Biology, House Ear Institute, Los Angeles, CA 90057, USA
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Lee E, Cha K, Bortfeld T, Deasy J. TU-C-224A-03: 4D-Image-Guided Treatment Planning Optimization for Management of Organ Motion in Radiotherapy Planning. Med Phys 2006. [DOI: 10.1118/1.2241527] [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: 11/07/2022] Open
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Moon SK, Lee HY, Pan H, Takeshita T, Park R, Cha K, Andalibi A, Lim DJ. Synergistic effect of interleukin 1 alpha on nontypeable Haemophilus influenzae-induced up-regulation of human beta-defensin 2 in middle ear epithelial cells. BMC Infect Dis 2006; 6:12. [PMID: 16433908 PMCID: PMC1368979 DOI: 10.1186/1471-2334-6-12] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2005] [Accepted: 01/24/2006] [Indexed: 11/20/2022] Open
Abstract
Background We recently showed that beta-defensins have antimicrobial activity against nontypeable Haemophilus influenzae (NTHi) and that interleukin 1 alpha (IL-1 alpha) up-regulates the transcription of beta-defensin 2 (DEFB4 according to new nomenclature of the Human Genome Organization) in human middle ear epithelial cells via a Src-dependent Raf-MEK1/2-ERK signaling pathway. Based on these observations, we investigated if human middle ear epithelial cells could release IL-1 alpha upon exposure to a lysate of NTHi and if this cytokine could have a synergistic effect on beta-defensin 2 up-regulation by the bacterial components. Methods The studies described herein were carried out using epithelial cell lines as well as a murine model of acute otitis media (OM). Human cytokine macroarray analysis was performed to detect the released cytokines in response to NTHi exposure. Real time quantitative PCR was done to compare the induction of IL-1 alpha or beta-defensin 2 mRNAs and to identify the signaling pathways involved. Direct activation of the beta-defensin 2 promoter was monitored using a beta-defensin 2 promoter-Luciferase construct. An IL-1 alpha blocking antibody was used to demonstrate the direct involvement of this cytokine on DEFB4 induction. Results Middle ear epithelial cells released IL-1 alpha when stimulated by NTHi components and this cytokine acted in an autocrine/paracrine synergistic manner with NTHi to up-regulate beta-defensin 2. This synergistic effect of IL-1 alpha on NTHi-induced beta-defensin 2 up-regulation appeared to be mediated by the p38 MAP kinase pathway. Conclusion We demonstrate that IL-1 alpha is secreted by middle ear epithelial cells upon exposure to NTHi components and that it can synergistically act with certain of these molecules to up-regulate beta-defensin 2 via the p38 MAP kinase pathway.
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Affiliation(s)
- Sung-Kyun Moon
- The Gonda Department of Cell and Molecular Biology, House Ear Institute, Los Angeles, CA, USA
- Department of Otolaryngology, Ajou University School of Medicine, Suwon, Korea
| | - Haa-Yung Lee
- The Gonda Department of Cell and Molecular Biology, House Ear Institute, Los Angeles, CA, USA
| | - Huiqi Pan
- The Gonda Department of Cell and Molecular Biology, House Ear Institute, Los Angeles, CA, USA
| | - Tamotsu Takeshita
- The Gonda Department of Cell and Molecular Biology, House Ear Institute, Los Angeles, CA, USA
- Department of Otorhinolaryngology, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Raekil Park
- The Gonda Department of Cell and Molecular Biology, House Ear Institute, Los Angeles, CA, USA
- Department of Microbiology, Vestibulocochlear Research Center, Wonkwang University, Iksan, Korea
| | - Kiweon Cha
- The Gonda Department of Cell and Molecular Biology, House Ear Institute, Los Angeles, CA, USA
| | - Ali Andalibi
- The Gonda Department of Cell and Molecular Biology, House Ear Institute, Los Angeles, CA, USA
- Department of Otolaryngology, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - David J Lim
- The Gonda Department of Cell and Molecular Biology, House Ear Institute, Los Angeles, CA, USA
- Department of Otolaryngology, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
- Department of Cell and Neurobiology, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
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Kim TA, Jiang S, Seng S, Cha K, Avraham HK, Avraham S. The BTB domain of the nuclear matrix protein NRP/B is required for neurite outgrowth. J Cell Sci 2005; 118:5537-48. [PMID: 16306221 DOI: 10.1242/jcs.02643] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The neuronal nuclear matrix protein, NRP/B, contains a BTB domain and kelch repeats and is expressed in primary neurons but not in primary glial cells. To examine the function of NRP/B in neurons, we analyzed the structure/function of the NRP/B-BTB domain and its role in neurite outgrowth. Based on three-dimensional modeling of NRP/B, we generated an NRP/B-BTB mutant containing three mutations in the conserved amino acids D47A, H60A and R61D that was termed BTB mutant A. BTB mutant A significantly reduced the dimerization of NRP/B compared to wild-type NRP/B. The NRP/B-BTB domain was required for nuclear localization and mediated the association of NRP/B with p110RB through the TR subdomain within the B pocket of p110RB. Overexpression of wild-type NRP/B and NRP/B-BTB domain significantly induced neurite outgrowth in PC12 cells and enhanced the G0-G1 cell population by ∼23% compared to the control cells, whereas NRP/B-BTB mutant A reduced neurite outgrowth by 70-80%, and inhibited NRP/B-p110RB association. Single cell microinjection of NRP/B-specific antibodies also blocked the neurite outgrowth of PC12 cells upon NGF stimulation. Interference of NRP/B expression by small interfering RNA (NRP/B-siRNA) inhibited neurite outgrowth and suppressed the NGF-induced outgrowth of neurites in PC12 cells. Additionally, p110RB phosphorylation at serine residue 795 was significantly reduced in PC12 cells treated with NRP/B siRNA compared to those treated with control GFP-siRNA, indicating that p110RB is a downstream target of NRP/B. Thus, the BTB domain of NRP/B regulates neurite outgrowth through its interaction with the TR subdomain within the B pocket of p110RB, and the conserved amino acids D47A, H60A and R61D within this domain of NRP/B are crucial residues for neurite extension in neuronal cells. These findings support a role for the BTB-domain of NRP/B as an important regulator of neuronal differentiation.
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Affiliation(s)
- Tae-Aug Kim
- Division of Experimental Medicine, Beth Israel Deaconess Medical Center, Harvard Institutes of Medicine, Boston, MA 02115, USA
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Lee E, Cha K, Bortfeld T, Deasy J, Wu T. Multistage Treatment Planning Optimization for Managing Organ Motion in Radiotherapy Planning. Int J Radiat Oncol Biol Phys 2005. [DOI: 10.1016/j.ijrobp.2005.07.361] [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: 11/28/2022]
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Chung M, Park E, Cho J, Han S, Yoon T, Cha K. Analysis of the Various Conditions That Affect Quality of Immature Oocytes in PCOS Patients With or Without hCG Priming. Fertil Steril 2005. [DOI: 10.1016/j.fertnstert.2005.07.338] [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: 11/30/2022]
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Kim T, Na K, Chung H, Yoon T, Cha K, Lee D. Effect of Different Basic Solution for Dehydration/Rehydration and Cooling Rate on the Survival of the Mouse Blastocyst After Vitrification. Fertil Steril 2005. [DOI: 10.1016/j.fertnstert.2005.07.433] [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: 10/25/2022]
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Lee K, Kim K, Yoon S, Baik Y, Chung T, Cha K. Involvement of Ion Transport-Related Genes in the Regulation of Mouse Ovarian Folliculogenesis. Fertil Steril 2005. [DOI: 10.1016/j.fertnstert.2005.07.1161] [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: 11/16/2022]
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Lee K, Yoon S, Chung H, Lee W, Yoon T, Cha K. Siah1b, a Direct Transcriptional Target of P53, Is an Oocyte-Specific Potential Regulator for Ovarian Folliculogenesis. Fertil Steril 2005. [DOI: 10.1016/j.fertnstert.2005.07.1143] [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: 11/30/2022]
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Lee K, Park C, Han S, Kwak I, Lee S, Cha K. In Silico Identification of a New Oocyte-Specific Gene Expression in the Mouse Ovary. Fertil Steril 2005. [DOI: 10.1016/j.fertnstert.2005.07.1004] [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: 10/25/2022]
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Lee K, Park C, Kim J, Han J, Yoon T, Cha K. Identification of Three Novel Oocyte-Specific Genes in the Mouse Ovary by Using Subtractive Hybridization, Real-Time PCR, and In Situ Hybridization. Fertil Steril 2005. [DOI: 10.1016/j.fertnstert.2005.07.1180] [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: 11/29/2022]
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Lee K, Yoon S, Park C, Choi D, Yoon T, Cha K. Simultaneous Detection of Seven Phosphoproteins of Various Signal Transduction Pathways in a Single Sample During Oocyte Maturation Process. Fertil Steril 2005. [DOI: 10.1016/j.fertnstert.2005.07.260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Na K, Kim J, Lee J, Yoon T, Cha K, Lee D. Effect of Melatonin on the Maturation of Mouse GV Oocytes and Apoptosis of Cumulus Cells In Vitro. Fertil Steril 2005. [DOI: 10.1016/j.fertnstert.2005.07.248] [Citation(s) in RCA: 6] [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: 11/17/2022]
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Cha K, Cha S, Lee D, Chung H, Lee W, Yoon T. Improved Clinical Outcomes Were Obtained From Vitrified Oocytes Using Gold Grid and Slush-Liquid Nitrogen After Failing the Fresh IVF-ET Program. Fertil Steril 2005. [DOI: 10.1016/j.fertnstert.2005.07.920] [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: 11/28/2022]
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Lee E, Cha K, Bortfeld T, Deasy J. SU-FF-J-26: Multistage Treatment Planning Optimization for Managing Organ Motion in Radiotherapy Planning. Med Phys 2005. [DOI: 10.1118/1.1997572] [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: 11/07/2022] Open
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Hwang S, Cha K, Kim H, Lee K. Clinical implications of elevated plasma b-type natriuretic peptide in cardiac arrest. Ann Emerg Med 2004. [DOI: 10.1016/j.annemergmed.2004.07.092] [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: 11/29/2022]
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Hwang S, Lee S, Kim H, Cha K. Effects of compression rate and compression/Relaxation ratio on the hemodynamics of simultaneous sterno-thoracic cardiopulmonary resuscitation in the canine model of cardiac arrest. Ann Emerg Med 2004. [DOI: 10.1016/j.annemergmed.2004.07.091] [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: 10/26/2022]
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Lee BC, Cha K, Avraham S, Avraham HK. Microarray analysis of differentially expressed genes associated with human ovarian cancer. Int J Oncol 2004; 24:847-51. [PMID: 15010821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023] Open
Abstract
To define the molecular changes associated with ovarian cancer, DNA microarray analysis has been adapted to detect differentially expressed genes in human normal ovary tissue, borderline, and invasive epithelial ovarian tumors. The differential expression of genes in the tumor tissues and normal tissues was confirmed by Northern and/or semi-quantitative RT-PCR analysis. Analysis of the differential gene-expression profiles of the normal and neoplastic ovary allowed us to detect previously unidentified genes in ovarian tissues. We observed up-regulation of the following genes in ovarian cancer: catechol-O-methyltransferase (COMT), the autocrine motility factor neuroleukin (NLK), the transcription regulator high mobility group I proteins (HMGI), the tyrosine kinase receptor ErbB-3, S100-alpha protein and Acyl-CoA-binding protein (ACBP). The transcription factor, chicken ovalbumin up-stream promoter transcription factor II (COUP-TFII), was the only gene down-regulated in ovarian cancer. Comparable gene-expression profiles were previously reported in breast cancer, suggesting that similar molecular events also exist in ovarian cancer. Our microarray analysis showed that most differentially expressed genes in ovarian cancer are linked to glucose/insulin metabolism, providing a possible molecular link between the glucose/insulin signaling pathway and the neoplasms of ovarian cancer.
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Affiliation(s)
- Byeong-Chel Lee
- Division of Experimental Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02115, USA
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