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Chand BR, Phillipson L, Ha T. Factors influencing organised faecal occult blood test screening participation in culturally and linguistically diverse populations: a scoping review. Public Health 2023; 219:67-72. [PMID: 37120935 DOI: 10.1016/j.puhe.2023.03.022] [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: 10/18/2022] [Revised: 03/22/2023] [Accepted: 03/23/2023] [Indexed: 05/02/2023]
Abstract
OBJECTIVE This review aims to provide a comprehensive overview of the literature examining factors influencing participation in organised faecal occult blood test (FOBT) screening programmes in culturally and linguistically diverse populations. This article addresses gaps in the literature by providing a mixed methods review of the multilevel influences on FOBT screening in culturally and linguistically diverse (CALD) populations. This review was guided by the question "What are the factors influencing participation in organised FOBT screening programs in CALD populations?" STUDY DESIGN Scoping review. METHODS A scoping review methodology was used to summarise the available evidence. A thematic analysis of the included studies was undertaken to identify factors influencing organised FOBT screening participation in CALD populations from the literature. RESULTS FOBT screening participation was lower by ethnicity, religion, birthplace and language spoken. Barriers to screening included, faecal aversion, fatalism, fear of cancer, language and literacy barriers, difficulty accessing translated materials and low colorectal screening knowledge and awareness. CALD populations also had lower perceived benefits, susceptibility and cues to action, higher perceived barriers and greater perceived external health locus control than non-CALD populations. Facilitators of screening included positive attitudes to screening, general practitioner recommendations and social support. Group education sessions and narrative-based screening information were found to increase screening participation. CONCLUSION This review highlights the range of interrelated factors influencing participation in organised FOBT screening programmes in CALD populations and proposes multicomponent interventions to address low screening uptake. Features of successful community-level interventions should be explored further. Narratives show promise for engaging CALD populations. Accessibility of screening information should be addressed at the system level. Leveraging the general practitioner relationship in promoting FOBT screening programmes may also be an effective strategy to target 'hard-to-reach' populations.
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Affiliation(s)
- B R Chand
- School of Health and Society, University of Wollongong, Australia.
| | - L Phillipson
- School of Health and Society, University of Wollongong, Australia
| | - T Ha
- School of Health and Society, University of Wollongong, Australia
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Kim H, Kim H, Nguyen LT, Ha T, Lim S, Kim K, Kim SH, Han K, Hyeon SJ, Ryu H, Park YS, Kim SH, Kim IB, Hong GS, Lee SE, Choi Y, Cohen LB, Oh U. Amplification of olfactory signals by Anoctamin 9 is important for mammalian olfaction. Prog Neurobiol 2022; 219:102369. [PMID: 36330924 DOI: 10.1016/j.pneurobio.2022.102369] [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: 05/21/2022] [Revised: 10/21/2022] [Accepted: 10/24/2022] [Indexed: 11/06/2022]
Abstract
Sensing smells of foods, prey, or predators determines animal survival. Olfactory sensory neurons in the olfactory epithelium (OE) detect odorants, where cAMP and Ca2+ play a significant role in transducing odorant inputs to electrical activity. Here we show Anoctamin 9, a cation channel activated by cAMP/PKA pathway, is expressed in the OE and amplifies olfactory signals. Ano9-deficient mice had reduced olfactory behavioral sensitivity, electro-olfactogram signals, and neural activity in the olfactory bulb. In line with the difference in olfaction between birds and other vertebrates, chick ANO9 failed to respond to odorants, whereas chick CNGA2, a major transduction channel, showed greater responses to cAMP. Thus, we concluded that the signal amplification by ANO9 is important for mammalian olfactory transduction.
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Affiliation(s)
- Hyungsup Kim
- Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Hyesu Kim
- Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul 08826, Republic of Korea
| | - Luan Thien Nguyen
- Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Taewoong Ha
- Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Sujin Lim
- Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Kyungmin Kim
- Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Soon Ho Kim
- Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Kyungreem Han
- Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Seung Jae Hyeon
- Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Hoon Ryu
- Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Yong Soo Park
- Department of Anatomy, Catholic Institute for Applied Anatomy, College of Medicine, Catholic University of Korea, Seoul 06591, Republic of Korea
| | - Sang Hyun Kim
- Department of Anatomy, Catholic Institute for Applied Anatomy, College of Medicine, Catholic University of Korea, Seoul 06591, Republic of Korea
| | - In-Beom Kim
- Department of Anatomy, Catholic Institute for Applied Anatomy, College of Medicine, Catholic University of Korea, Seoul 06591, Republic of Korea
| | - Gyu-Sang Hong
- Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Seung Eun Lee
- Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Yunsook Choi
- Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; Department of Cellular and Molecular Physiology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Lawrence B Cohen
- Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; Department of Cellular and Molecular Physiology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Uhtaek Oh
- Brain Science Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul 08826, Republic of Korea.
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Ha T, Kim MS, Kang B, Kim K, Hong SS, Kang T, Woo J, Han K, Oh U, Choi CW, Hong GS. Lotus Seed Green Embryo Extract and a Purified Glycosyloxyflavone Constituent, Narcissoside, Activate TRPV1 Channels in Dorsal Root Ganglion Sensory Neurons. J Agric Food Chem 2022; 70:3969-3978. [PMID: 35343690 DOI: 10.1021/acs.jafc.1c07724] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Several studies have documented the broad-spectrum bioactivities of a lotus seed (Plumula nelumbinis [PN]) green embryo extract. However, the specific bioactive components and associated molecular mechanisms remain largely unknown. This study aimed to identify the ion channel-activating mechanisms of PN extracts. Using fluorometric imaging and patch-clamp recordings, PN extracts were screened for calcium channel activation in dorsal root ganglion (DRG) neurons. The TRPV1 channels in DRG neurons were strongly activated by the PN extract (mean amplitude of 131 ± 45 pA at 200 μg/mL) and its purified glycosyloxyflavone narcissoside (401 ± 271 pA at 100 μM). Serial treatment with a 200 μg/mL PN extract in TRPV1-overexpressing HEK293T cells induced robust desensitization to 10 ± 10% of the initial current amplitude. Thus, we propose that the PN extract and narcissoside function as TRPV1 agonists. This new finding may advance our knowledge regarding the traditional and scientific functions of PN in human health and disease.
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Affiliation(s)
- Taewoong Ha
- Brain Science Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Mi-Sun Kim
- Brain Science Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Bokeum Kang
- Brain Science Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Kyungmin Kim
- Brain Science Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Seong Su Hong
- Natural Product Research Team, Gyeonggi Biocenter, Gyeonggido Business and Science Accelerator, Gyeonggi-Do 16229, Republic of Korea
| | - Taek Kang
- Brain Science Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Junhyuk Woo
- Brain Science Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Kyungreem Han
- Brain Science Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Uhtaek Oh
- Brain Science Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Chun Whan Choi
- Natural Product Research Team, Gyeonggi Biocenter, Gyeonggido Business and Science Accelerator, Gyeonggi-Do 16229, Republic of Korea
| | - Gyu-Sang Hong
- Brain Science Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
- Division of Bio-Medical Science & Technology, KIST School, University of Science and Technology, Seoul 02792, Republic of Korea
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Lee S, Seung BJ, Yang IS, Lee J, Ha T, Park HM, Cheong JH, Kim S, Sur JH, Hwang GS, Nam H. 1H NMR based urinary metabolites profiling dataset of canine mammary tumors. Sci Data 2022; 9:132. [PMID: 35361774 PMCID: PMC8971436 DOI: 10.1038/s41597-022-01229-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 02/23/2022] [Indexed: 11/09/2022] Open
Abstract
The identification of efficient and sensitive biomarkers for non-invasive tests is one of the major challenges in cancer diagnosis. To address this challenge, metabolomics is widely applied for identifying biomarkers that detect abnormal changes in cancer patients. Canine mammary tumors exhibit physiological characteristics identical to those in human breast cancer and serve as a useful animal model to conduct breast cancer research. Here, we aimed to provide a reliable large-scale metabolite dataset collected from dogs with mammary tumors, using proton nuclear magnetic resonance spectroscopy. We identified 55 metabolites in urine samples from 20 benign, 87 malignant, and 49 healthy control subjects. This dataset provides details of mammary tumor-specific metabolites in dogs and insights into cancer-specific metabolic alterations that share similar molecular characteristics. Measurement(s) | Metabolite | Technology Type(s) | 1H nuclear magnetic resonance spectroscopy | Factor Type(s) | Age • Breeds • Sex • ER status • HER2 status • Histological grade • Neutral status | Sample Characteristic - Organism | Canis lupus familiaris |
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Affiliation(s)
- Songyeon Lee
- School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, South Korea
| | - Byung-Joon Seung
- Department of Veterinary Pathology, College of Veterinary Medicine, Konkuk University, Seoul, 05029, South Korea
| | - In Seok Yang
- Department of Biomedical Systems Informatics and Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, 03722, South Korea
| | - Jueun Lee
- Integrated Metabolomics Research Group, Western Seoul Center, Korea Basic Science Institute, Seoul, 03759, South Korea
| | - Taewoong Ha
- Integrated Metabolomics Research Group, Western Seoul Center, Korea Basic Science Institute, Seoul, 03759, South Korea
| | - Hee-Myung Park
- Department of Veterinary Internal Medicine, College of Veterinary Medicine, Konkuk University, Seoul, 05029, South Korea
| | - Jae-Ho Cheong
- Department of Biomedical Systems Informatics and Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, 03722, South Korea
| | - Sangwoo Kim
- Department of Biomedical Systems Informatics and Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, 03722, South Korea
| | - Jung-Hyang Sur
- Department of Veterinary Pathology, College of Veterinary Medicine, Konkuk University, Seoul, 05029, South Korea
| | - Geum-Sook Hwang
- Integrated Metabolomics Research Group, Western Seoul Center, Korea Basic Science Institute, Seoul, 03759, South Korea. .,Department of Chemistry and Nano Science, Ewha Womans University, Seoul, 03760, South Korea.
| | - Hojung Nam
- School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, South Korea.
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Lee J, Nakamura T, Kobayashi K, Kim DT, Ha T, Hahn GR, Kim KJ, Shin S. Transverse bunch-by-bunch feedback system for time-resolved experiments at PLS-II. J Synchrotron Radiat 2021; 28:1417-1422. [PMID: 34475289 DOI: 10.1107/s1600577521005889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 06/07/2021] [Indexed: 06/13/2023]
Abstract
A description of the upgraded bunch-by-bunch feedback system for time-resolved experiments at Pohang Light Source II (PLS-II) is provided. The bunch-by-bunch feedback system has been upgraded to increase the single-bunch current in the hybrid fill pattern of the PLS-II facility. The project is part of the SPring-8 and PLS-II collaboration. The main features of the upgrade are to employ a single 500 MHz analog-to-digital converter (ADC) instead of the previous four 125 MHz interleaved ADCs for 500 MHz rate, to replace a single-loop two-dimensional feedback with two independent one-dimensional feedback loops, to implement the tune measurement function with a single bunch, and mainly to implement single-bunch and stretcher control. The realization of a 400 mA hybrid fill pattern including a 10 mA single bunch demonstrates the precision of the upgraded bunch-by-bunch feedback system.
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Affiliation(s)
- Jaeyu Lee
- Pohang Accelerator Laboratory, POSTECH, Pohang, Kyungbuk 37673, Republic of Korea
| | - T Nakamura
- SPring-8, Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - K Kobayashi
- SPring-8, Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - D T Kim
- Pohang Accelerator Laboratory, POSTECH, Pohang, Kyungbuk 37673, Republic of Korea
| | - T Ha
- Pohang Accelerator Laboratory, POSTECH, Pohang, Kyungbuk 37673, Republic of Korea
| | - G R Hahn
- Pohang Accelerator Laboratory, POSTECH, Pohang, Kyungbuk 37673, Republic of Korea
| | - K J Kim
- Pohang Accelerator Laboratory, POSTECH, Pohang, Kyungbuk 37673, Republic of Korea
| | - S Shin
- Pohang Accelerator Laboratory, POSTECH, Pohang, Kyungbuk 37673, Republic of Korea
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Ha T, Kemp B, Wallace M. Hybrid team based learning-personalised education for teaching epidemiology in public health degrees. Eur J Public Health 2020. [DOI: 10.1093/eurpub/ckaa165.312] [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: 11/13/2022] Open
Abstract
Abstract
Background
University education in Australia and internationally involves teaching diverse students: in terms of age, life experience, previous degrees completed, and level of English competency. In Australia the Bachelors of Public Health (BPH) at The University of Wollongong, epidemiology is a core subject. It aims to equip students with the knowledge and skills needed to design, critique and interpret studies that investigate why different populations experience different health outcomes. A student-centred learning strategy; Hybrid Team Based Learning and Personalised Education teaching strategy (HTBL-PE) was created to maximise academic success. Each phase has a distinct purpose based on learning theories (e.g. TBL, Bloom's taxonomy and Vygotsky). HTBL-PE aims to systematically build students abilities; strengthen self-confidence and belief, by teaching the way students learn and harnessing the capabilities of the team to strengthen the individual.
Objectives
HTBL-PE was evaluated in spring 2019 in the BPH, where their experiences at the beginning and end of semester were measured.
Results
In total 73 out of 84 enrolled students provided data at both time-points (87%). At the end of the semester, the vast majority of students indicated their interest in epidemiology had increased (93%), critical thinking had improved (92%), and confidence as independent learners had increased (86%). Outcomes did not differ significantly by gender or across learning styles. More than two thirds of students had already applied learnings from this subject in other settings (67%). Students' final mark for this subject was significantly higher than their Weighted Average Mark (WAM) prior to the semester (+17.4, p < 0.001). Average scores for the subject were > 84/100 with a < 0.5% failure rate.
Conclusions
HTBL-PE has positive learning outcomes; low failure rates, increased confidence in learning and themselves, increased interest in epidemiology and high overall scores in the subject.
Key messages
An effective new innovative teaching strategy resulted in a subject average score > 84/100 and <0.5% failure rate. The vast majority of students reported increased confidence as independent lifelong learners, critical thinking, confidence in epidemiology (knowledge, skills, and attitudes) and themselves.
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Affiliation(s)
- T Ha
- School of Health and Society, The University of Wollongong, Wollongong, Australia
| | - B Kemp
- School of Health and Society, The University of Wollongong, Wollongong, Australia
| | - M Wallace
- Learning Teaching and Curriculum, The University of Wollongong, Wollongong, Australia
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Thompson J, Ng J, Armstrong B, Feletto E, Ha T. Differences in Colorectal Cancer (CRC) patients who did and did not undergo screening. Eur J Public Health 2020. [DOI: 10.1093/eurpub/ckaa165.1343] [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: 11/14/2022] Open
Abstract
Abstract
Background
The Australian National Bowel Cancer Screening Program (NBSCP) is a free population-based screening program which aims to identify precancerous lesions and early colorectal cancer (CRC) using an immunochemical faecal occult blood test in average risk Australians. Formally commencing in 2006, NBCSP participation rate in eligible 50-74-year-old people was 42% in 2018. The barriers and facilitators of participation in the NBCSP have been explored for the general, at-risk population but not in a population of CRC patients. This is the first study to assess a population of CRC patients, post diagnosis, who would have been eligible for CRC screening to determine the barriers and facilitators to screening.
Methods
A cross sectional study nested within a cohort study. Data from CRC patients who participated in the 45 and Up Study; the largest cohort study in Australia and southern hemisphere, were analysed to compare those who had and had not participated in CRC screening. Logistic regression analyses were conducted using RStudio (version 3.5.2, Boston, Massachusetts, USA.). Multiple Imputation (MI), was used to handle missing values assumed to be missing at random.
Results
A total of 339 CRC patients were included. Patients who were female, overweight (≥25kg/m2), consumed less than the recommended five servings of vegetables per day, consumed less than or equal to fourteen standard drinks per week (compared to non-drinkers) or did not meet physical activity guidelines were significantly less likely to have participated in screening.
Conclusions
Our study has taken a unique approach to identifying a high-risk group by exploring factors to screening participation in CRC patients. CRC patients with less healthy lifestyles were less likely to participate in screening. In contrast to previous studies, female patients were less likely to participate in screening than males were. This was an unexpected finding and should be replicated.
Key messages
Not surprising that those with less healthy lifestyle practices also reflected less than ideal screening practices. Surprising that female patients participated less in screening than males. Future interventions to improve CRC screening participation rates should consider specialised messaging for average-risk females who are overweight not meeting dietary or physical activity guidelines.
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Affiliation(s)
- J Thompson
- School of Health and Society, The University of Wollongong, Wollongong, Australia
| | - J Ng
- School of Health and Society, The University of Wollongong, Wollongong, Australia
| | - B Armstrong
- School of Public Health, University of Sydney, Sydney, Australia
- School of Population and Global Health, University of Western Australia, Perth, Australia
| | - E Feletto
- School of Public Health, University of Sydney, Sydney, Australia
- Cancer Research Division, Cancer Council NSW, Sydney, Australia
| | - T Ha
- School of Health and Society, The University of Wollongong, Wollongong, Australia
- Research Assets Division, Sax Institute, Sydney, Australia
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Ha T, Kang DK, Kim TH. Percentage volume of delayed kinetics in computer-aided diagnosis of MRI of the breast to reduce false-positive results and unnecessary biopsies. Clin Radiol 2020; 75:962.e1-962.e8. [PMID: 32888654 DOI: 10.1016/j.crad.2020.08.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 08/03/2020] [Indexed: 11/30/2022]
Abstract
AIM To investigate the best cut-off percentage volume of delayed kinetics using magnetic resonance imaging (MRI) with computer-aided diagnosis (CAD) to reduce unnecessary biopsies in patients with newly diagnosed breast cancer. MATERIALS AND METHODS Between January 2017 and December 2018, 94 malignant and 56 benign masses were analysed using MRI CAD. All malignant and benign masses measured <2 cm and were confirmed histopathologically. The optimal cut-off values for washout, plateau, and persistent components were determined using the maximum Youden Index. The positive predictive value (PPV) was analysed using morphological descriptors and combining the percentage volume of delayed kinetics. RESULTS The area under the curve (AUC) was highest at ≤73% persistent component (AUC=0.759). In the subgroup analyses of masses <1 cm, the AUC was highest a plateau of >26% (AUC=0.697). When the persistent ≤73% criterion was applied to the lesions of C4a, the positive predictive value (PPV) increased from 61.9% to 72.44% with reduced false-negative cases and when applied to the lesions of C4a and C4b, the PPV increased from 61.9% to 78.1% with slightly increased false-negative cases. For subcentimetre lesions, the PPV increased from 46.77% to 54.72% with the same number of false-negative cases, when a plateau of >26% was applied to C4a, and the PPV increased from 46.77% to 61.36% with five false-negative cases when applied to C4a and C4b. CONCLUSION The percentage volume of delayed kinetics has the potential to improve the PPV of breast MRI. When suspicious masses <2 cm do not show ≤73% persistence, follow-up rather than biopsy could be considered; however, to avoid increasing false-negative cases, delayed kinetic information should be used with caution and accurate margin assessment is essential.
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Affiliation(s)
- T Ha
- Department of Radiology, Ajou University School of Medicine, Worldcup-ro 164, Youngtong-gu, Suwon, Gyeonggi-do, 16499, South Korea
| | - D K Kang
- Department of Radiology, Ajou University School of Medicine, Worldcup-ro 164, Youngtong-gu, Suwon, Gyeonggi-do, 16499, South Korea
| | - T H Kim
- Department of Radiology, Ajou University School of Medicine, Worldcup-ro 164, Youngtong-gu, Suwon, Gyeonggi-do, 16499, South Korea.
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Feldsine PT, Mui LA, Forgey RL, Kerr DE, Al-Hasani S, Arling V, Beatty S, Bohannon J, Brannan J, Brown N, Bryant J, Burford M, Chavez C, Chinault K, Cooan N, Copeland F, Dixon L, Fitzgerald S, Franke W, Frissora R, Gailbreath K, Godon S, Good M, Ha T, Hagen H, Hanson S, Johnson K, Koch S, Leung S, Lienau A, Lin J, Lin S, Marolla B, Maycock L, McDonagh S, Miller L, Otten N, Post R, Resutek J, Rice B, Richter D, Ritger C, Schwantes D, Simon J, Smith J, Smith S, Stokes R, Thibideau J, Tuncan E, Uber D, Van Landingham V, Vrana D, West D. Equivalence of Assurance® Gold Enzyme Immunoassay for Visual or Instrumental Detection of Motile and Nonmotile Salmonella in All Foods to AOAC Culture Method: Collaborative Study. J AOAC Int 2019. [DOI: 10.1093/jaoac/83.4.871] [Citation(s) in RCA: 4] [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: 11/12/2022]
Abstract
Abstract
Six foods representative of a wide variety of processed, dried powder processed, and raw food types were analyzed by the Assurance® Gold Salmonella Enzyme Immunoassay (EIA) and AOAC INTERNATIONAL culture method. Paired samples of each food type were simultaneously analyzed; one sample by the Assurance method and one by the AOAC culture method. The results for Assurance method were read visually and instrumentally with a microplate reader. A total of 24 laboratories representing federal government agencies and private industry, in the United States and Canada, participated in this collaborative study. Food types were inoculated with species of Salmonella with the exception of raw ground chicken, which was naturally contaminated. No statistical differences (p < 0.05) were observed between Assurance Gold Salmonella EIA with either visual or instrumental interpretation and the AOAC culture method for any inoculation level of any food type or naturally contaminated food. The Assurance visual and instrumental options of reading sample reactions produced the same results for 1277 of the 1296 sample and controls analyzed.
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Affiliation(s)
| | - Linda A Mui
- BioControl Systems, Inc., 12822 SE 32nd St, Bellevue, WA 98005
| | - Robin L Forgey
- BioControl Systems, Inc., 12822 SE 32nd St, Bellevue, WA 98005
| | - David E Kerr
- BioControl Systems, Inc., 12822 SE 32nd St, Bellevue, WA 98005
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Son H, Jang Y, Ahn J, Jung C, Ha T. P.1282, 6-Dimethoxy-1, 4-benzoquinone increases skeletal muscle mass through Akt/mTOR signaling pathway. Neuromuscul Disord 2019. [DOI: 10.1016/j.nmd.2019.06.184] [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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Kim Y, Ha T, Ahn J. P.56Role of NcoR1 and PGC-1 for mitochondrial dysfunction in skeletal muscle of ovariectomized mice. Neuromuscul Disord 2019. [DOI: 10.1016/j.nmd.2019.06.085] [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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Ha T, Jung Y, Kim J, Park S, Kang D, Kim T. Comparison of the diagnostic performance of abbreviated MRI and full diagnostic MRI using a computer-aided diagnosis (CAD) system in patients with a personal history of breast cancer: the effect of CAD-generated kinetic features on reader performance. Clin Radiol 2019; 74:817.e15-817.e21. [DOI: 10.1016/j.crad.2019.06.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 06/27/2019] [Indexed: 10/26/2022]
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Ha T, Atherton J, Chuan F, Douglas C, Ellem F, Mok L, Robertson L, Shah S, Steel L, Wood B, Rofail S. Sacubitril-Valsartan: Snapshot of a New Heart Failure Medication. Heart Lung Circ 2018. [DOI: 10.1016/j.hlc.2018.06.191] [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: 10/28/2022]
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Park KS, Kim MK, Seo Y, Ha T, Yoo K, Hyeon SJ, Hwang YJ, Lee J, Ryu H, Choo H, Chong Y. A Difluoroboron β-Diketonate Probe Shows "Turn-on" Near-Infrared Fluorescence Specific for Tau Fibrils. ACS Chem Neurosci 2017; 8:2124-2131. [PMID: 28737890 DOI: 10.1021/acschemneuro.7b00224] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Tau aggregation in neuronal cells has recently received significant attention as a robust predictor of the progression of Alzheimer's disease (AD) because of its proven correlation with the degree of cognitive impairment in AD patients. Accordingly, noninvasive imaging of tau aggregates has been highlighted as a promising diagnostic tool for AD. We have previously identified a tau-specific "turn-on" near-infrared fluorescent (NIRF) probe (1), and, in this study, structural modification was performed to optimize its physicochemical as well as fluorescence properties. Thus, a series of fluorescent dyes (2a-2j) composed of a variously substituted difluoroboron β-diketonate and an N,N-dimethylaniline moiety linked by a length-extendable π-bridge were prepared. Among those, isobutyl-substituted difluoroboron β-ketonate with a π-conjugated 1,4-butadienyl linker (2e) showed the most promising properties as a tau-specific NIRF probe. Compared with 1, the "turn-on" fluorescence of 2e was more specific to tau fibrils, and it showed 8.8- and 6.2-times higher tau-over-Aβ and tau-over-BSA specificity, respectively. Also, the fluorescence intensity of 2e upon binding to tau fibrils was substantially higher (∼2.9 times) than that observed from 1. The mechanism for tau-specificity of 2e was investigated, which suggested that the molecular rotor-like property of 2e enables specific recognition of the microenvironment of tau aggregates to emit strong fluorescence. In transgenic cell lines stably expressing GFP-tagged tau proteins, 2e showed good colocalization with tau-GFP. Moreover, the fluorescence from 2e exhibited almost complete overlap with p-Tau antibody staining in the human AD brain tissue section. Collectively, these observations demonstrate the potential of 2e as a tau-specific fluorescent dye in both in vitro and ex vivo settings.
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Affiliation(s)
- Kwang-su Park
- Department
of Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University, Hwayang-dong, Gwangjin-gu,
Seoul 143-701, Korea
| | - Mi Kyoung Kim
- Department
of Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University, Hwayang-dong, Gwangjin-gu,
Seoul 143-701, Korea
| | - Yujin Seo
- Department
of Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University, Hwayang-dong, Gwangjin-gu,
Seoul 143-701, Korea
| | - Taewoong Ha
- Department
of Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University, Hwayang-dong, Gwangjin-gu,
Seoul 143-701, Korea
| | - Kyeongha Yoo
- Department
of Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University, Hwayang-dong, Gwangjin-gu,
Seoul 143-701, Korea
| | - Seung Jae Hyeon
- Center
for Neuro-Medicine, Korea Institute of Science and Technology, 39-1
Hawolgok-dong, Seoungbuk-gu, Seoul 136-791, Korea
| | - Yu Jin Hwang
- Center
for Neuro-Medicine, Korea Institute of Science and Technology, 39-1
Hawolgok-dong, Seoungbuk-gu, Seoul 136-791, Korea
| | - Junghee Lee
- Veteran’s Affairs Boston Healthcare System, Boston, Massachusetts 02130, United States
- Boston
University Alzheimer’s Disease Center and Department of Neurology, Boston University School of Medicine, Boston, Massachusetts 02118, United States
| | - Hoon Ryu
- Center
for Neuro-Medicine, Korea Institute of Science and Technology, 39-1
Hawolgok-dong, Seoungbuk-gu, Seoul 136-791, Korea
- Veteran’s Affairs Boston Healthcare System, Boston, Massachusetts 02130, United States
- Boston
University Alzheimer’s Disease Center and Department of Neurology, Boston University School of Medicine, Boston, Massachusetts 02118, United States
| | - Hyunah Choo
- Center
for Neuro-Medicine, Korea Institute of Science and Technology, 39-1
Hawolgok-dong, Seoungbuk-gu, Seoul 136-791, Korea
- Department
of Biological Chemistry, Korea University of Science and Technology, Youseong-gu, Daejeon 305-350, Korea
| | - Youhoon Chong
- Department
of Bioscience and Biotechnology, Bio/Molecular Informatics Center, Konkuk University, Hwayang-dong, Gwangjin-gu,
Seoul 143-701, Korea
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15
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Boyde M, Peters R, New N, Hwang R, Ha T, Korczyk D. Self-care educational intervention to reduce hospitalisations in heart failure: A randomised controlled trial. Eur J Cardiovasc Nurs 2017; 17:178-185. [DOI: 10.1177/1474515117727740] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [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: 01/17/2023]
Abstract
Background: A variety of educational interventions have been implemented to assist patients with heart failure to maintain their own health, develop self-care behaviours and decrease readmissions. Aims: The purpose of this study was to determine the effectiveness of a multimedia educational intervention for patients with heart failure in reducing unplanned hospital readmissions. Methods: The study, a randomised controlled trial in a large tertiary referral hospital in Australia, recruited 200 patients. Patients diagnosed with heart failure were randomly allocated 1:1 to usual education or a multimedia educational intervention. The multimedia approach began with an individual needs assessment to develop an educational plan. The educational intervention included viewing a DVD, and verbal discussion supported by a written manual with a teach-back evaluation strategy. The primary outcome was all-cause unplanned hospital readmission at 28 days, three months and 12 months post-recruitment. The secondary outcomes were changes in knowledge and self-care behaviours at three months and 12 months post-recruitment. Results: At 12 months, data on 171 participants were analysed. There were 24 participants who had an unplanned hospital readmission in the intervention group compared to 44 participants in the control group ( p=0.005). The self-care educational intervention reduced the risk of readmission at 12 months by 30% (relative risk: 0.703; 95% confidence interval: 0.548–0.903). Conclusion: A targeted multimedia educational intervention can be effective in reducing all-cause unplanned readmissions for people with heart failure.
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Affiliation(s)
- M Boyde
- Princess Alexandra Hospital, Australia
- University of Queensland, Australia
| | - R Peters
- Princess Alexandra Hospital, Australia
- University of Queensland, Australia
| | - N New
- Princess Alexandra Hospital, Australia
| | - R Hwang
- Princess Alexandra Hospital, Australia
- University of Queensland, Australia
| | - T Ha
- Princess Alexandra Hospital, Australia
- University of Queensland, Australia
| | - D Korczyk
- Princess Alexandra Hospital, Australia
- University of Queensland, Australia
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16
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Wallace MP, Thomas JM, Meligonis G, Ha T. Systemic lupus erythematosus, following prodromal idiopathic thrombocytopenic purpura, presenting with skin lesions resembling malignant atrophic papulosis. Clin Exp Dermatol 2017; 42:774-776. [DOI: 10.1111/ced.13158] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/08/2016] [Indexed: 11/30/2022]
Affiliation(s)
- M. P. Wallace
- Department of Dermatology; Addenbrooke's Hospital; Cambridge University Hospitals NHS Foundation Trust; Cambridge Biomedical Campus; Cambridge UK
| | - J. M. Thomas
- Department of Dermatology; Addenbrooke's Hospital; Cambridge University Hospitals NHS Foundation Trust; Cambridge Biomedical Campus; Cambridge UK
| | - G. Meligonis
- Department of Dermatology; Addenbrooke's Hospital; Cambridge University Hospitals NHS Foundation Trust; Cambridge Biomedical Campus; Cambridge UK
| | - T. Ha
- Department of Dermatology; Addenbrooke's Hospital; Cambridge University Hospitals NHS Foundation Trust; Cambridge Biomedical Campus; Cambridge UK
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17
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Meitner S, Baylor L, Commaux N, Shiraki D, Combs S, Bjorholm T, Ha T, McGinnis W. Design and Commissioning of a Three-Barrel Shattered Pellet Injector for DIII-D Disruption Mitigation Studies. Fusion Science and Technology 2017. [DOI: 10.1080/15361055.2017.1333854] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- S. Meitner
- Oak Ridge National Laboratory, 1 Bethel Valley Rd, Bldg 5600, RM L407, MS 6169, Oak Ridge, Tennessee 37831
| | - L.R. Baylor
- Oak Ridge National Laboratory, 1 Bethel Valley Rd, Bldg 5600, RM L407, MS 6169, Oak Ridge, Tennessee 37831
| | - N. Commaux
- Oak Ridge National Laboratory, 1 Bethel Valley Rd, Bldg 5600, RM L407, MS 6169, Oak Ridge, Tennessee 37831
| | - D. Shiraki
- Oak Ridge National Laboratory, 1 Bethel Valley Rd, Bldg 5600, RM L407, MS 6169, Oak Ridge, Tennessee 37831
| | - S. Combs
- Oak Ridge National Laboratory, 1 Bethel Valley Rd, Bldg 5600, RM L407, MS 6169, Oak Ridge, Tennessee 37831
| | - T. Bjorholm
- Oak Ridge National Laboratory, 1 Bethel Valley Rd, Bldg 5600, RM L407, MS 6169, Oak Ridge, Tennessee 37831
| | - T. Ha
- Oak Ridge National Laboratory, 1 Bethel Valley Rd, Bldg 5600, RM L407, MS 6169, Oak Ridge, Tennessee 37831
| | - W. McGinnis
- Oak Ridge National Laboratory, 1 Bethel Valley Rd, Bldg 5600, RM L407, MS 6169, Oak Ridge, Tennessee 37831
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18
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Seo Y, Park KS, Ha T, Kim MK, Hwang YJ, Lee J, Ryu H, Choo H, Chong Y. A Smart Near-Infrared Fluorescence Probe for Selective Detection of Tau Fibrils in Alzheimer's Disease. ACS Chem Neurosci 2016; 7:1474-1481. [PMID: 27576176 DOI: 10.1021/acschemneuro.6b00174] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Development of a novel, tau-selective smart near-infrared fluorescence (NIRF) probe was attempted by combining the previously identified core scaffold 3,5-dimethoxy-N,N-dimethylaniline-4-yl moiety, with the characteristic donor-π-acceptor architecture of the smart NIRF Aβ probes DANIR-2c and MCAAD-3. A series of compounds (2 and 3) were prepared, which were identified as "turn-on" NIRF probes for the visual detection of tau aggregates and Aβ fibrils (λem = 650 nm, Stokes shifts = 70-110 nm). In particular, combination of the 3,5-dimethoxy-N,N-dimethylanilin-4-yl moiety and the donor part of MCAAD-3 endowed the resulting probes, 3g and 3h, with significant selectivity toward tau aggregates (selectivity for tau over Aβ = 5.7 and 3.8); they showed much higher fluorescence intensities upon binding to tau aggregates (FItau = 49 and 108) than when bound to Aβ fibrils (FIAβ = 9 and 28). Quantitative analysis of binding affinities and fluorescence properties of 3g and 3h revealed that microenvironment-sensitive molecular rotor-like behavior, rather than binding affinity to the target, is responsible for their selective turn-on fluorescence detection of tau fibrils. Selective fluorescent labeling of tau fibrils by 3g and 3h was further demonstrated by immunofluorescence staining of human Alzheimer's disease brain sections, which showed colocalization of the probes (3g and 3h) and phosphorylated tau antibody.
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Affiliation(s)
- Yujin Seo
- Department
of Integrative Bioscience and Biotechnology, Bio/Molecular Informatics
Center, Konkuk University, Hwayang-dong, Gwangjin-gu, Seoul 143-701, Korea
| | - Kwang-su Park
- Department
of Integrative Bioscience and Biotechnology, Bio/Molecular Informatics
Center, Konkuk University, Hwayang-dong, Gwangjin-gu, Seoul 143-701, Korea
| | - Taewoong Ha
- Department
of Integrative Bioscience and Biotechnology, Bio/Molecular Informatics
Center, Konkuk University, Hwayang-dong, Gwangjin-gu, Seoul 143-701, Korea
| | - Mi Kyoung Kim
- Department
of Integrative Bioscience and Biotechnology, Bio/Molecular Informatics
Center, Konkuk University, Hwayang-dong, Gwangjin-gu, Seoul 143-701, Korea
| | - Yu Jin Hwang
- Center
for Neuro-Medicine, Korea Institute of Science and Technology, 39-1
Hawolgok-dong, Seoungbuk-gu, Seoul 136-791, Korea
| | - Junghee Lee
- Veteran’s Affairs Boston Healthcare System, Boston, Massachusetts 02130, United States
- Boston
University Alzheimer’s Disease Center and Department of Neurology, Boston University School of Medicine, Boston, Massachusetts 02118, United States
| | - Hoon Ryu
- Center
for Neuro-Medicine, Korea Institute of Science and Technology, 39-1
Hawolgok-dong, Seoungbuk-gu, Seoul 136-791, Korea
- Veteran’s Affairs Boston Healthcare System, Boston, Massachusetts 02130, United States
- Boston
University Alzheimer’s Disease Center and Department of Neurology, Boston University School of Medicine, Boston, Massachusetts 02118, United States
| | - Hyunah Choo
- Center
for Neuro-Medicine, Korea Institute of Science and Technology, 39-1
Hawolgok-dong, Seoungbuk-gu, Seoul 136-791, Korea
- Department
of Biological Chemistry, Korea University of Science and Technology, Youseong-gu, Daejeon 305-350, Korea
| | - Youhoon Chong
- Department
of Integrative Bioscience and Biotechnology, Bio/Molecular Informatics
Center, Konkuk University, Hwayang-dong, Gwangjin-gu, Seoul 143-701, Korea
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19
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Abstract
Helicases control the accessibility of single-stranded (ss) nucleic acid (NA) generated as a transient intermediate during almost every step in cells related to nucleic acid metabolisms. For subsequent processing, however, helicases need to adjust the pace of unwinding adequately to avoid ssNA exposure to nucleases. Therefore, understanding how the unwinding process of helicases is regulated is crucial to address genome integrity and repair mechanisms. Using single-molecule fluorescence-force spectroscopy with fluorescence localization, we recently observed the stoichiometry of UvrD helicase, which determines the functions of UvrD: translocation and unwinding. For the first time, we provide direct evidence that a UvrD dimer is required to initiate the unwinding pathway. Moreover, with subpixel precision of fluorescence localization, the dynamic parameters of helicases can be obtained directly. Here, we present detailed single-molecule assays for observing the biochemical activities of helicases in real time and revealing how mechanical forces are involved in protein-nucleic acid interactions. These single-molecule approaches are generally applicable to many other protein-nucleic acid systems.
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Affiliation(s)
- C-T Lin
- Johns Hopkins University, Baltimore, MD, United States
| | - T Ha
- Johns Hopkins University, Baltimore, MD, United States; Howard Hughes Medical Institute, Baltimore, MD, United States.
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20
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Ha T, Ng A, Wang W, Korczyk D. Very Low Proportion of Patients have Previous Non-Ischaemic Cardiomyopathy as Sole Indication for Ongoing ACEi and BB Use. Heart Lung Circ 2016. [DOI: 10.1016/j.hlc.2016.06.294] [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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21
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Nguyen A, Nghiem N, Tran T, Hoang V, Le N, Phan Q, Le N, Ho V, Do V, Ha T, Nguyen H, Van Vinh CN, Thwaites G, van Doorn H, Le T. Development and evaluation of a vral-specific random PCR and next-generation sequencing based assay for detection and sequencing of hand, foot, and mouth disease pathogens. Int J Infect Dis 2016. [DOI: 10.1016/j.ijid.2016.02.435] [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] Open
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22
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Boyde M, Peters R, Hwang R, Korczyk D, Ha T, New N. The Self-Care Educational Intervention study: study protocol of a randomised controlled trial. Heart Lung Circ 2015. [DOI: 10.1016/j.hlc.2015.06.262] [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: 10/23/2022]
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23
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Kim T, Lee J, Jung H, Ha T, Kim S, Han N, Lee E, Kim T, Kwon M, Lee S, Kim M, Rhee B, Park J. Triiodothyronine Induces Proliferation of Pancreatic β-cells through the MAPK/ERK Pathway. Exp Clin Endocrinol Diabetes 2014; 122:240-5. [DOI: 10.1055/s-0034-1367060] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- T. Kim
- Department of Internal Medicine, College of Medicine, Inje University, Busan, Korea
| | - J. Lee
- Paik Institute for Clinical Research, Molecular Therapy Lab, Inje University, Busan, Korea
| | - H. Jung
- Paik Institute for Clinical Research, Molecular Therapy Lab, Inje University, Busan, Korea
| | - T. Ha
- Department of General Surgery, College of Medicine, Inje University, Busan, Korea
| | - S. Kim
- Department of Internal Medicine, College of Medicine, Inje University, Busan, Korea
| | - N. Han
- Department of Internal Medicine, College of Medicine, Inje University, Busan, Korea
| | - E. Lee
- Department of Internal Medicine, College of Medicine, Inje University, Busan, Korea
| | - T. Kim
- Department of Internal Medicine, College of Medicine, Inje University, Busan, Korea
| | - M. Kwon
- Department of Internal Medicine, College of Medicine, Inje University, Busan, Korea
| | - S. Lee
- Department of Internal Medicine, College of Medicine, Inje University, Busan, Korea
| | - M. Kim
- Department of Internal Medicine, College of Medicine, Inje University, Busan, Korea
| | - B. Rhee
- Department of Internal Medicine, College of Medicine, Inje University, Busan, Korea
| | - J. Park
- Department of Internal Medicine, College of Medicine, Inje University, Busan, Korea
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24
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Emma P, Venturini M, Bane KLF, Stupakov G, Kang HS, Chae MS, Hong J, Min CK, Yang H, Ha T, Lee WW, Park CD, Park SJ, Ko IS. Experimental demonstration of energy-chirp control in relativistic electron bunches using a corrugated pipe. Phys Rev Lett 2014; 112:034801. [PMID: 24484143 DOI: 10.1103/physrevlett.112.034801] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Indexed: 06/03/2023]
Abstract
The first experimental study is presented of a corrugated wall device that uses wakefields to remove a linear energy correlation in a relativistic electron beam (a "dechirper"). Time-resolved measurements of both longitudinal and transverse wakefields of the device are presented and compared with simulations. This study demonstrates the feasibility to employ a dechirper for precise control of the beam phase space in the next generation of free-electron-lasers.
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Affiliation(s)
- P Emma
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - M Venturini
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - K L F Bane
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - G Stupakov
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - H-S Kang
- Pohang Accelerator Laboratory, Pohang 790-784, Republic of Korea
| | - M S Chae
- Pohang Accelerator Laboratory, Pohang 790-784, Republic of Korea
| | - J Hong
- Pohang Accelerator Laboratory, Pohang 790-784, Republic of Korea
| | - C-K Min
- Pohang Accelerator Laboratory, Pohang 790-784, Republic of Korea
| | - H Yang
- Pohang Accelerator Laboratory, Pohang 790-784, Republic of Korea
| | - T Ha
- Pohang Accelerator Laboratory, Pohang 790-784, Republic of Korea
| | - W W Lee
- Pohang Accelerator Laboratory, Pohang 790-784, Republic of Korea
| | - C D Park
- Pohang Accelerator Laboratory, Pohang 790-784, Republic of Korea
| | - S J Park
- Pohang Accelerator Laboratory, Pohang 790-784, Republic of Korea
| | - I S Ko
- Pohang Accelerator Laboratory, Pohang 790-784, Republic of Korea
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25
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Caiani E, Pellegrini A, Carminati M, Lang R, Auricchio A, Vaida P, Obase K, Sakakura T, Komeda M, Okura H, Yoshida K, Zeppellini R, Noni M, Rigo T, Erente G, Carasi M, Costa A, Ramondo B, Thorell L, Akesson-Lindow T, Shahgaldi K, Germanakis I, Fotaki A, Peppes S, Sifakis S, Parthenakis F, Makrigiannakis A, Richter U, Sveric K, Forkmann M, Wunderlich C, Strasser R, Djikic D, Potpara T, Polovina M, Marcetic Z, Peric V, Ostenfeld E, Werther-Evaldsson A, Engblom H, Ingvarsson A, Roijer A, Meurling C, Holm J, Radegran G, Carlsson M, Tabuchi H, Yamanaka T, Katahira Y, Tanaka M, Kurokawa T, Nakajima H, Ohtsuki S, Saijo Y, Yambe T, D'alto M, Romeo E, Argiento P, D'andrea A, Vanderpool R, Correra A, Sarubbi B, Calabro' R, Russo M, Naeije R, Saha SK, Warsame TA, Caelian AG, Malicse M, Kiotsekoglou A, Omran AS, Sharif D, Sharif-Rasslan A, Shahla C, Khalil A, Rosenschein U, Erturk M, Oner E, Kalkan A, Pusuroglu H, Ozyilmaz S, Akgul O, Aksu H, Akturk F, Celik O, Uslu N, Bandera F, Pellegrino M, Generati G, Donghi V, Alfonzetti E, Guazzi M, Rangel I, Goncalves A, Sousa C, Correia A, Martins E, Silva-Cardoso J, Macedo F, Maciel M, Lee S, Kim W, Yun H, Jung L, Kim E, Ko J, Enescu O, Florescu M, Rimbas R, Cinteza M, Vinereanu D, Kosmala W, Rojek A, Cielecka-Prynda M, Laczmanski L, Mysiak A, Przewlocka-Kosmala M, Liu D, Hu K, Niemann M, Herrmann S, Cikes M, Gaudron P, Knop S, Ertl G, Bijnens B, Weidemann F, Saravi M, Tamadoni A, Jalalian R, Hojati M, Ramezani S, Yildiz A, Inci U, Bilik M, Yuksel M, Oyumlu M, Kayan F, Ozaydogdu N, Aydin M, Akil M, Tekbas E, Shang Q, Zhang Q, Fang F, Wang S, Li R, Lee AP, Yu C, Mornos C, Ionac A, Cozma D, Popescu I, Ionescu G, Dan R, Petrescu L, Sawant A, Srivatsa S, Adhikari P, Mills P, Srivatsa S, Boshchenko A, Vrublevsky A, Karpov R, Trifunovic D, Stankovic S, Vujisic-Tesic B, Petrovic M, Nedeljkovic I, Banovic M, Tesic M, Petrovic M, Dragovic M, Ostojic M, Zencirci E, Esen Zencirci A, Degirmencioglu A, Karakus G, Ekmekci A, Erdem A, Ozden K, Erer H, Akyol A, Eren M, Zamfir D, Tautu O, Onciul S, Marinescu C, Onut R, Comanescu I, Oprescu N, Iancovici S, Dorobantu M, Melao F, Pereira M, Ribeiro V, Oliveira S, Araujo C, Subirana I, Marrugat J, Dias P, Azevedo A, Grillo MT, Piamonti B, Abate E, Porto A, Dell'angela L, Gatti G, Poletti A, Pappalardo A, Sinagra G, Pinto-Teixeira P, Galrinho A, Branco L, Fiarresga A, Sousa L, Cacela D, Portugal G, Rio P, Abreu J, Ferreira R, Fadel B, Abdullah N, Al-Admawi M, Pergola V, Bech-Hanssen O, Di Salvo G, Tigen MK, Pala S, Karaahmet T, Dundar C, Bulut M, Izgi A, Esen AM, Kirma C, Boerlage-Van Dijk K, Yamawaki M, Wiegerinck E, Meregalli P, Bindraban N, Vis M, Koch K, Piek J, Bouma B, Baan J, Mizia M, Sikora-Puz A, Gieszczyk-Strozik K, Lasota B, Chmiel A, Chudek J, Jasinski M, Deja M, Mizia-Stec K, Silva Fazendas Adame PR, Caldeira D, Stuart B, Almeida S, Cruz I, Ferreira A, Lopes L, Joao I, Cotrim C, Pereira H, Unger P, Dedobbeleer C, Stoupel E, Preumont N, Argacha J, Berkenboom G, Van Camp G, Malev E, Reeva S, Vasina L, Pshepiy A, Korshunova A, Timofeev E, Zemtsovsky E, Jorgensen PG, Jensen J, Fritz-Hansen T, Biering-Sorensen T, Jons C, Olsen N, Henri C, Magne J, Dulgheru R, Laaraibi S, Voilliot D, Kou S, Pierard L, Lancellotti P, Tayyareci Y, Dworakowski R, Kogoj P, Reiken J, Kenny C, Maccarthy P, Wendler O, Monaghan M, Song J, Ha T, Jung Y, Seo M, Choi S, Kim Y, Sun B, Kim D, Kang D, Song J, Le Tourneau T, Topilsky Y, Inamo J, Mahoney D, Suri R, Schaff H, Enriquez-Sarano M, Bonaque Gonzalez J, Sanchez Espino A, Merchan Ortega G, Bolivar Herrera N, Ikuta I, Macancela Quinonez J, Munoz Troyano S, Ferrer Lopez R, Gomez Recio M, Dreyfus J, Cimadevilla C, Brochet E, Himbert D, Iung B, Vahanian A, Messika-Zeitoun D, Izumo M, Takeuchi M, Seo Y, Yamashita E, Suzuki K, Ishizu T, Sato K, Aonuma K, Otsuji Y, Akashi Y, Muraru D, Addetia K, Veronesi F, Corsi C, Mor-Avi V, Yamat M, Weinert L, Lang R, Badano L, Minamisawa M, Koyama J, Kozuka A, Motoki H, Izawa A, Tomita T, Miyashita Y, Ikeda U, Florescu C, Niemann M, Liu D, Hu K, Herrmann S, Gaudron P, Scholz F, Stoerk S, Ertl G, Weidemann F, Marchel M, Serafin A, Kochanowski J, Piatkowski R, Madej-Pilarczyk A, Filipiak K, Hausmanowa-Petrusewicz I, Opolski G, Meimoun P, M'barek D, Clerc J, Neikova A, Elmkies F, Tzvetkov B, Luycx-Bore A, Cardoso C, Zemir H, Mansencal N, Arslan M, El Mahmoud R, Pilliere R, Dubourg O, Ikonomidis I, Lambadiari V, Pavlidis G, Koukoulis C, Kousathana F, Varoudi M, Tritakis V, Triantafyllidi H, Dimitriadis G, Lekakis I, Kovacs A, Kosztin A, Solymossy K, Celeng C, Apor A, Faludi M, Berta K, Szeplaki G, Foldes G, Merkely B, Kimura K, Daimon M, Nakajima T, Motoyoshi Y, Komori T, Nakao T, Kawata T, Uno K, Takenaka K, Komuro I, Gabric ID, Vazdar L, Pintaric H, Planinc D, Vinter O, Trbusic M, Bulj N, Nobre Menezes M, Silva Marques J, Magalhaes R, Carvalho V, Costa P, Brito D, Almeida A, Nunes-Diogo A, Davidsen ES, Bergerot C, Ernande L, Barthelet M, Thivolet S, Decker-Bellaton A, Altman M, Thibault H, Moulin P, Derumeaux G, Huttin O, Voilliot D, Frikha Z, Aliot E, Venner C, Juilliere Y, Selton-Suty C, Yamada T, Ooshima M, Hayashi H, Okabe S, Johno H, Murata H, Charalampopoulos A, Tzoulaki I, Howard L, Davies R, Gin-Sing W, Grapsa J, Wilkins M, Gibbs J, Castillo J, Bandeira A, Albuquerque E, Silveira C, Pyankov V, Chuyasova Y, Lichodziejewska B, Goliszek S, Kurnicka K, Dzikowska Diduch O, Kostrubiec M, Krupa M, Grudzka K, Ciurzynski M, Palczewski P, Pruszczyk P, Arana X, Oria G, Onaindia J, Rodriguez I, Velasco S, Cacicedo A, Palomar S, Subinas A, Zumalde J, Laraudogoitia E, Saeed S, Kokorina M, Fromm A, Oeygarden H, Waje-Andreassen U, Gerdts E, Gomez E, Vallejo N, Pedro-Botet L, Mateu L, Nunyez R, Llobera L, Bayes A, Sabria M, Antonini-Canterin F, Mateescu A, La Carrubba S, Vriz O, Di Bello V, Carerj S, Zito C, Ginghina C, Popescu B, Nicolosi G, Mateescu A, La Carrubba S, Vriz O, Di Bello V, Carerj S, Zito C, Ginghina C, Popescu B, Nicolosi G, Antonini-Canterin F, Pudil R, Praus R, Vasatova M, Vojacek J, Palicka V, Hulek P, Pradel S, Mohty D, Damy T, Echahidi N, Lavergne D, Virot P, Aboyans V, Jaccard A, Mateescu A, La Carrubba S, Vriz O, Di Bello V, Carerj S, Zito C, Ginghina C, Popescu B, Nicolosi G, Antonini-Canterin F, Doulaptsis C, Symons R, Matos A, Florian A, Masci P, Dymarkowski S, Janssens S, Bogaert J, Lestuzzi C, Moreo A, Celik S, Lafaras C, Dequanter D, Tomkowski W, De Biasio M, Cervesato E, Massa L, Imazio M, Watanabe N, Kijima Y, Akagi T, Toh N, Oe H, Nakagawa K, Tanabe Y, Ikeda M, Okada K, Ito H, Milanesi O, Biffanti R, Varotto E, Cerutti A, Reffo E, Castaldi B, Maschietto N, Vida V, Padalino M, Stellin G, Bejiqi R, Retkoceri R, Bejiqi H, Retkoceri A, Surdulli S, Massoure P, Cautela J, Roche N, Chenilleau M, Gil J, Fourcade L, Akhundova A, Cincin A, Sunbul M, Sari I, Tigen M, Basaran Y, Suermeci G, Butz T, Schilling I, Sasko B, Liebeton J, Van Bracht M, Tzikas S, Prull M, Wennemann R, Trappe H, Attenhofer Jost CH, Pfyffer M, Scharf C, Seifert B, Faeh-Gunz A, Naegeli B, Candinas R, Medeiros-Domingo A, Wierzbowska-Drabik K, Roszczyk N, Sobczak M, Plewka M, Krecki R, Kasprzak J, Ikonomidis I, Varoudi M, Papadavid E, Theodoropoulos K, Papadakis I, Pavlidis G, Triantafyllidi H, Anastasiou - Nana M, Rigopoulos D, Lekakis J, Tereshina O, Surkova E, Vachev A, Merchan Ortega G, Bonaque Gonzalez J, Sanchez Espino A, Bolivar Herrera N, Bravo Bustos D, Ikuta I, Aguado Martin M, Navarro Garcia F, Ruiz Lopez F, Gomez Recio M, Merchan Ortega G, Bonaque Gonzalez J, Bravo Bustos D, Sanchez Espino A, Bolivar Herrera N, Bonaque Gonzalez J, Navarro Garcia F, Aguado Martin M, Ruiz Lopez M, Gomez Recio M, Eguchi H, Maruo T, Endo K, Nakamura K, Yokota K, Fuku Y, Yamamoto H, Komiya T, Kadota K, Mitsudo K, Nagy AI, Manouras A, Gunyeli E, Shahgaldi K, Winter R, Hoffmann R, Barletta G, Von Bardeleben S, Kasprzak J, Greis C, Vanoverschelde J, Becher H, Hu K, Liu D, Niemann M, Herrmann S, Cikes M, Gaudron P, Knop S, Ertl G, Bijnens B, Weidemann F, Di Salvo G, Al Bulbul Z, Issa Z, Khan A, Faiz A, Rahmatullah S, Fadel B, Siblini G, Al Fayyadh M, Menting ME, Van Den Bosch A, Mcghie J, Cuypers J, Witsenburg M, Van Dalen B, Geleijnse M, Roos-Hesselink J, Olsen F, Jorgensen P, Mogelvang R, Jensen J, Fritz-Hansen T, Bech J, Biering-Sorensen T, Agoston G, Pap R, Saghy L, Forster T, Varga A, Scandura S, Capodanno D, Dipasqua F, Mangiafico S, Caggegi AM, Grasso C, Pistritto AM, Imme' S, Ministeri M, Tamburino C, Cameli M, Lisi M, D'ascenzi F, Cameli P, Losito M, Sparla S, Lunghetti S, Favilli R, Fineschi M, Mondillo S, Ojaghihaghighi Z, Javani B, Haghjoo M, Moladoust H, Shahrzad S, Ghadrdoust B, Altman M, Aussoleil A, Bergerot C, Bonnefoy-Cudraz E, Derumeaux GA, Thibault H, Shkolnik E, Vasyuk Y, Nesvetov V, Shkolnik L, Varlan G, Gronkova N, Kinova E, Borizanova A, Goudev A, Saracoglu E, Ural D, Sahin T, Al N, Cakmak H, Akbulut T, Akay K, Ural E, Mushtaq S, Andreini D, Pontone G, Bertella E, Conte E, Baggiano A, Annoni A, Formenti A, Fiorentini C, Pepi M, Cosgrove C, Carr L, Chao C, Dahiya A, Prasad S, Younger J, Biering-Sorensen T, Christensen L, Krieger D, Mogelvang R, Jensen J, Hojberg S, Host N, Karlsen F, Christensen H, Medressova A, Abikeyeva L, Dzhetybayeva S, Andossova S, Kuatbayev Y, Bekbossynova M, Bekbossynov S, Pya Y, Farsalinos K, Tsiapras D, Kyrzopoulos S, Spyrou A, Stefopoulos C, Romagna G, Tsimopoulou K, Tsakalou M, Voudris V, Cacicedo A, Velasco Del Castillo S, Anton Ladislao A, Aguirre Larracoechea U, Onaindia Gandarias J, Romero Pereiro A, Arana Achaga X, Zugazabeitia Irazabal G, Laraudogoitia Zaldumbide E, Lekuona Goya I, Varela A, Kotsovilis S, Salagianni M, Andreakos V, Davos C, Merchan Ortega G, Bonaque Gonzalez J, Sanchez Espino A, Bolivar Herrera N, Macancela Quinones J, Ikuta I, Ferrer Lopez R, Munoz Troyano S, Bravo Bustos D, Gomez Recio M. Poster session Friday 13 December - PM: 13/12/2013, 14:00-18:00 * Location: Poster area. Eur Heart J Cardiovasc Imaging 2013. [DOI: 10.1093/ehjci/jet206] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Boyde M, Peters R, Weglowski M, Ha T, Korczyk D. Evaluation of Unplanned Hospital Readmissions for Chronic Heart Failure. Heart Lung Circ 2013. [DOI: 10.1016/j.hlc.2013.05.182] [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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Seppo A, Al-Kofahi Y, Padfield D, Ha T, Jun N, Kyshtoobayeva A, Kaanumalle L, Corwin A, Henderson D, Kamath V, McCulloch C, Hollman D, Bloom KJ. Abstract P3-05-06: Automated analysis of Her2 FISH using combined Immunofluorescence and FISH signals. Cancer Res 2012. [DOI: 10.1158/0008-5472.sabcs12-p3-05-06] [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
Introduction: Qualifying patients for Her2 targeted therapy is currently done by detecting Her2 protein overexpression or gene amplification using immunohistochemistry and/or FISH. We have recently developed a method for detecting both signals on the same tissue section allowing direct correlation of protein expression and gene copy number on a cell by cell basis. Accurate assessment of Her2 gene copy number is critical and can pose a challenge due to tumor heterogeneity. This paper reports the accuracy of a proprietary FISH dot counting algorithm on a cell-by-cell basis, potentially allowing analysis of thousands instead of dozens of tumor cells.
Method: Automatic FISH signal counts were compared to manual counts of 888 cells selected from 19 invasive ductal breast carcinoma samples exhibiting varying degrees of Her2 expression collected between June 2011 and March 2012. Tissue sections (4 µm) were mounted on positively charged slides, baked and processed through deparaffinization, rehydration and antigen retrieval, then stained for immunofluorescence (IF) using Cy5 labeled Her2 and Cy3 labeled cytokeratin antibodies, counterstained with DAPI, and imaged using InCell 2000 analyzer with GE-proprietary acquisition and processing software. Images were collected at 10x magnification and digitally stitched to span the entire tissue section. A pathologist then selected separate tumor and adjacent normal epithelium regions for subsequent imaging at 40x magnification. Slides were subsequently processed for FISH by pepsin digestion and then subjected to FISH by using PathVysion kit (Abbott Molecular, Des Plaines, IL). After hybridization and subsequent high stringency washes, samples were DAPI stained and mounted for microscopy. Samples were imaged at 40x at the same regions recorded for 40x IF acquisition, using filtersets appropriate for FISH fluorophores and DAPI.
A proprietary automated processing algorithm was used to analyze combined IF and FISH signals and derive case specific Her2 score from the tumor and/or adjacent normal epithelium. Cell-level dot counting accuracy was assessed using two metrics comparing automated counts to manual counts: cell classification agreement, where a normal cell was defined as having 3 or less Her2 and Cep17 dots; and dot-counting match, where a difference of more than 20% in absolute counts was considered an error.
Result: Our automatic results gave an overall cell-by-cell classification agreement of 88% (range 71% to 98% by case). Combining classification agreement and counting match, our algorithm gave an overall accuracy of 81% (range 63% to 97% by case). Restricting to tumor tissues (as judged by pathologist review of IF) classification agreement and accuracy were 84% and 72%, respectively.
Conclusion: The observed variability in algorithm performance between the different cases was due to the fact that error root causes were case dependent. For instance, the main cause of over-counting errors was image noise and artifacts. On the other hand, the main cause of under-counting was low image contrast, especially in highly amplified cases. These results are an early indication of the promise of automatic dot counting applied to breast cancer slides multiplexed for Her2 IF and FISH.
Citation Information: Cancer Res 2012;72(24 Suppl):Abstract nr P3-05-06.
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Affiliation(s)
- A Seppo
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - Y Al-Kofahi
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - D Padfield
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - T Ha
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - N Jun
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - A Kyshtoobayeva
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - L Kaanumalle
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - A Corwin
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - D Henderson
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - V Kamath
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - C McCulloch
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - D Hollman
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - KJ Bloom
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
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Ha T, Seppo A, Ginty F, Kenny K, Henderson D, Kyshtoobayeva A, Gerdes M, Larriera A, Liu X, Corwin A, Zingelewicz S, Lazare M, Jun N, Kyshtoobayeva A, Chow C, Al-Kofahi Y, Hollman D, Bloom K. Abstract P3-05-05: HER2 Expression and Gene copy analysis by Immunofluorescence and Fluorescence in situ Hybridization, on a Single formalin-fixed paraffin-embedded tissue section. Cancer Res 2012. [DOI: 10.1158/0008-5472.sabcs12-p3-05-05] [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
Introduction: Breast cancer is the most common cancer for women worldwide. HER2 expression and gene copy number are important when determining eligibility for adjuvant therapy and/or chemotherapy medications. One challenging issue for breast cancer testing is intratumoral heterogeneity of HER2 gene amplification. Intratumoral heterogeneity can make it difficult to localize target cells of interest. Serial tissue sections used for independent H&E, IHC and FISH stains also increase the difficulty to localize targets due to cellular truncation. We have developed a system to assess both HER2 expression and gene copy number on the same cell.
Method: Immunofluorescence (IF) and Fluorescence in situ Hybridization (FISH) were performed on tissue sections from 19 patients with invasive ductal breast carcinoma. Cases were selected based on prior HER2 FISH results (HER2:Chromosome 17 = ratio) representing unamplified (<2.0), amplified (≥2.0) and equivocal (1.8–2.2). Samples were collected from June 2011 – February 2012. Tissue sections were cut at 4uM from formalin-fixed paraffin-embedded tissue blocks. Slides were stained with antibodies for HER2 (Clone #D8F12, Cell Signaling, Danvers, MA), cytokeratin (Clone #AE1, eBioscience, San Diego, CA) and Pan cytokeratin (Clone #PCK-26, Sigma-Aldrich, St. Louis, MO). The whole tissue imaging was performed on the In-Cell (GE Healthcare, Chalfont St. Giles, UK) at 10X. Proprietary software developed by GRC (GE Global Research, Niskayuna, NY) controlled the hardware and performed numerous algorithmic functions. Regions of Interest (ROI) were selected by a pathologist on a whole tissue image and coordinates were recorded by the software. The slides were then imaged at 40x using the previously recorded ROI's. The same slides were stained with the PathVysion HER2/CEP17 FISH kit (Abbott Molecular, Des Plaines, IL). Slides were registered to the previous IF scan using recorded coordinates and tissue morphology recognition algorithms. The sections were imaged for FISH at 40X using the previous ROI selections. Cases were assessed for successful protein and genetic expression using proprietary visualization tools for combined analysis.
Results: We evaluated a total of 22 breast cancer cases with 19 cases detecting both protein and gene expression. Of the three cases that could not be evaluated the rationale is as follows: tissue damage incurred during imaging, insufficient focus during the FISH imaging portion, and poor signal to noise of the FISH dots.
Conclusion: The reported incidence of intratumoral HER2 amplification heterogeneity is as high as 30%. The challenges associated with tumor heterogeneity may benefit from a standardize analysis method. Using integrated images generated by this system, pathologist is able to select the appropriate cells for HER2 copy number enumeration based on the expression level of HER2 protein, in the same cell, allowing rapid identification of intratumoral heterogeneity.
Citation Information: Cancer Res 2012;72(24 Suppl):Abstract nr P3-05-05.
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Affiliation(s)
- T Ha
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - A Seppo
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - F Ginty
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - K Kenny
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - D Henderson
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - A Kyshtoobayeva
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - M Gerdes
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - A Larriera
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - X Liu
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - A Corwin
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - S Zingelewicz
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - M Lazare
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - N Jun
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - A Kyshtoobayeva
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - C Chow
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - Y Al-Kofahi
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - D Hollman
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
| | - K Bloom
- GE Global Research, Niskayuna, NY; Clarient Diagnostics Services, Aliso Viejo, CA
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Tuan J, Ha T, Ong W, Siow T, Tham I, Yap S, Tan T, Chua E, Fong K, Wee J. PD-0295 LATE TOXICITIES IN 796 PATIENTS AFTER CONVENTIONAL RADIATION THERAPY ALONE FOR NASOPHARYNGEAL CARCINOMA. Radiother Oncol 2012. [DOI: 10.1016/s0167-8140(12)70634-5] [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: 10/28/2022]
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Tuan J, Ha T, Ong W, Siow T, Ng W, Tham I, Wang M, Chua E, Tan T. 7040 POSTER Treatment of Prostate Cancer With Intensity Modulated Radiation Therapy Using an Empty Bladder Protocol – Treatment Outcomes and Toxicity Profile. Eur J Cancer 2011. [DOI: 10.1016/s0959-8049(11)71991-8] [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
ABSTRACTWe have investigated the surface roughness and the grain size in giant magnetoresistance (GMR) spin valve multilayers of the general type: FeMn/Ni80Fe20Co/Cu/Co/Ni80Fe20 on glass and aluminum oxide substrates by scanning tunneling microscopy (STM). The two substrates give very similar results. These polycrystalline GMR multilayers have a tendency to exhibit larger grain size and increased roughness with increasing thickness of the metal layers. Samples deposited at a low substrate temperature (150 K) exhibit smaller grains and less roughness. Valleys between the dome-shaped individual grainsare the dominant form of roughness. This roughness contributes to the ferromagnetic, magnetostatic coupling in these films, an effect termed “orange peel” coupling by Néel. We have calculated the strength of this coupling, based on our STM images, and obtain values generally within about 20% of the experimental values. It appears likely that the ferromagnetic coupling generally attributed to so-called “pinholes” in the Cu when the Cu film thickness is too small is actually “orange peel” coupling caused by these valleys.
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Ahn J, Um M, Choi W, Kim S, Ha T. Protective effects of Glycyrrhiza uralensis Fisch. on the cognitive deficits caused by beta-amyloid peptide 25-35 in young mice. Biogerontology 2006; 7:239-47. [PMID: 16821116 DOI: 10.1007/s10522-006-9023-0] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2005] [Accepted: 03/27/2006] [Indexed: 01/23/2023]
Abstract
Amyloid beta protein (Abeta) may be involved in the progression of Alzheimer's disease (AD), by acting as a neurotoxin and eliciting oxidative stress. This study was designed to determine the effects of Glycyrrhiza uralensis Fisch. water extract (GWE) on the cognitive deficits and oxidative stress induced by the administration of Abeta(25-35) in mice. Mice in two of the four animal groups were fed an experimental diet containing either 0.5 or 1% GWE for the entire 6-week experimental period. Control mice and a further experimental group were fed a non-GWE diet. Abeta(25-35) was administered to the three experimental groups by intracerebroventricular (i.c.v.) injection (10 microg/10 microl/mouse) once per week in weeks 5 and 6 of the experimental period. Behavioral changes were assessed using both a passive avoidance (after the injection of Abeta(25-35) in week 5) and the Morris water-maze tests (after the injection of Abeta(25-35) in week 6). Control animals were administered vehicle alone. The prolonged consumption of a diet containing GWE ameliorated the cognitive deficits caused by the i.c.v. injections of Abeta(25-35). Treatment with Abeta(25-35) led to higher concentrations of thiobarbituric acid reactive substances in the brain, and GWE attenuated this response. There was a decrease in catalase activity in the group provided with 1% GWE. Acetylcholinesterase activity was significantly reduced in the brains of all GWE-treated animals compared to that in the non-GWE-fed experimental group. These results suggest that GWE exerts a protective effect against the cognitive impairments often observed in AD, and that in mice this effect is mediated by antioxidant actions against oxidative stress.
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Affiliation(s)
- J Ahn
- Biofunction Research Team, Food Function Research Division, Korea Food Research Institute, San 46-1, Baekhyun-dong, Bundang-gu, Seongnam-si, Gyeonggi-do 463-746, Republic of Korea
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Alvarez JM, Ha T, Musk W, Robins P, Price R, Byrne MJ. Importance of mediastinoscopy, bilateral thoracoscopy, and laparoscopy in correct staging of malignant mesothelioma before extrapleural pneumonectomy. J Thorac Cardiovasc Surg 2005; 130:905-6. [PMID: 16153957 DOI: 10.1016/j.jtcvs.2005.02.051] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2004] [Revised: 01/22/2005] [Accepted: 02/08/2005] [Indexed: 11/24/2022]
Affiliation(s)
- J M Alvarez
- Department of Cardiothoracic Surgery, Sir Charles Gairdner Hospital, Perth, West Australia, Australia
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Abstract
The active form of the hairpin ribozyme is brought about by the interaction of two formally unpaired loops. In a natural molecule, these are present on two adjacent arms of a four-way junction. Although activity can be obtained in molecules lacking this junction, the junction is important in the promotion of the folded state of the ribozyme under physiological conditions, at a rate that is faster than the chemical reaction. Single-molecule fluorescence resonance energy transfer studies show that the junction introduces a discrete intermediate into the folding process, which repeatedly juxtaposes the two loops and thus promotes their docking. Using single-molecule enzymology, the cleavage and ligation rates have been measured directly. The pH dependence of the rates is consistent with a role for nucleobases acting in general acid-base catalysis.
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Affiliation(s)
- T J Wilson
- Cancer Research U.K. Nucleic Acid Structure Research Group, MSI/WTB Complex, The University of Dundee, Dundee DD1 5EH, UK
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Zhou L, Ma W, Yang Z, Zhang F, Lu L, Ding Z, Ding B, Ha T, Gao X, Li C. VEGF165 and angiopoietin-1 decreased myocardium infarct size through phosphatidylinositol-3 kinase and Bcl-2 pathways. Gene Ther 2004; 12:196-202. [PMID: 15510173 DOI: 10.1038/sj.gt.3302416] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Angiogenic growth factors, vascular endothelial growth factor (VEGF) and angiopoietin-1 (Ang1) could decrease myocardial infarct size, which was assumed to be related with newly formed capillaries. We doubted that these capillaries could do this solely and the potential protective mechanisms of VEGF and Ang1 on myocardium need to be evaluated. Three types of adenoviruses encoding human VEGF(165) (Ad-VEGF(165)), human angiopoietin-1 (Ad-Ang1) and green fluorescent protein (Ad-GFP, as a parallel control) were constructed. Experiments were taken both in vitro and in vivo. As in vitro, the antiapoptosis effect of VEGF(165), Ang1 and VEGF(165)+Ang1 on cardiac myoblasts was observed, which seemed to be related with the activation of phosphatidylinositol-3 kinase and Bcl-2 pathways. As in vivo, adenoviruses were intramyocardially injected immediately after the ligation of the left anterior descending coronay arteries in rats. The results showed positive effect of VEGF(165), Ang1 and VEGF(165)+Ang1 on decreasing the myocardial infarct size at the 7th day. Myocardial PI-3K activity and Bcl-2 expression were elevated relatively at the 3rd day. The protective effect of VEGF(165) and Ang1 on the myocardium may broaden their functional research and contribute to their clinical use in the future.
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Affiliation(s)
- L Zhou
- Department of Cardiology, the first affiliated hospital, Nanjing Medical University, Nanjing, China
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36
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Abstract
Branched helical junctions are common in nucleic acids. In DNA, the four-way junction (Holliday junction) is an essential intermediate in homologous recombination and is a highly dynamic structure, capable of stacking conformer transitions and branch migration. Our single-molecule fluorescence studies provide unique insight into the energy landscape of Holliday junctions by visualizing these processes directly. In the hairpin ribozyme, an RNA four-way junction is an important structural element that enhances active-site formation by several orders of magnitude. Our single-molecule studies suggest a plausible mechanism for how the junction achieves this remarkable feat; the structural dynamics of the four-way junction bring about frequent contacts between the loops that are needed to form the active site. The most definitive evidence for this is the observation of three-state folding in single-hairpin ribozymes, the intermediate state of which is populated due to the intrinsic properties of the junction.
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Affiliation(s)
- S A McKinney
- Department of Physics, University of Illinois, Urbana-Champaign, Urbana, IL 61801, USA
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Brandes RP, Beer S, Ha T, Busse R. Withdrawal of cerivastatin induces monocyte chemoattractant protein 1 and tissue factor expression in cultured vascular smooth muscle cells. Arterioscler Thromb Vasc Biol 2003; 23:1794-800. [PMID: 12933532 DOI: 10.1161/01.atv.0000092126.25380.bc] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE The withdrawal of 3-hydroxy-3-methylglutaryl-coenzyme A-reductase inhibitors (statins) deteriorates endothelial function. We determined in vascular smooth muscle cells whether statin withdrawal leads to the expression of proinflammatory genes involved in the development and progression of arteriosclerosis. METHODS AND RESULTS The withdrawal of cerivastatin from pretreated vascular smooth muscle cells induced an increase in monocyte chemoattractant protein 1 (MCP-1) and tissue factor (TF) mRNA expression and enhanced MCP-1 secretion as well as cell surface TF activity. In the presence of cerivastatin, this effect was mimicked by geranylgeranyl pyrophosphate or mevalonate. Withdrawal-induced MCP-1 expression was sensitive to PD98059, SB203580, and diphenylene iodonium, suggesting an involvement of extracellular signal-regulated kinase 1/2, p38 mitogen-activated protein kinase, and the NADPH oxidase. Withdrawal increased the activity of extracellular signal-regulated kinase 1/2 and p38 mitogen-activated protein kinase and enhanced radical generation. Because the latter effect may result from an Rac-mediated activation of the NADPH oxidase, the effect of withdrawal on Rac translocation was studied. Statin treatment induced an increase in Rac-1 content in the cytoplasm. On withdrawal, however, an "overshoot" translocation of Rac to the plasma membrane occurred. CONCLUSIONS These observations suggest that statin withdrawal results in the activation of Rac and enhanced oxidative stress. The subsequent activation of redox-activated signal-transduction cascades results in the expression of MCP-1 and TF.
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Affiliation(s)
- R P Brandes
- Institut für Kardiovaskuläre Physiologie, Klinikum der J.W. Goethe-Universität, Theodor-Stern-Kai 7, D-60596 Frankfurt am Main, Germany.
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Ha T, Naysmith L, Waterston K, Oh C, Weller R, Rees JL. Defining the quantitative contribution of the melanocortin 1 receptor (MC1R) to variation in pigmentary phenotype. Ann N Y Acad Sci 2003; 994:339-47. [PMID: 12851334 DOI: 10.1111/j.1749-6632.2003.tb03198.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
The melanocortin 1 receptor (MC1R) is a key determinant of pigmentary phenotype. Several sequence variants of the MC1R have been described, many of which are associated with red hair and cutaneous sensitivity to ultraviolet radiation even in the absence of red hair. Red hair approximates to an autosomal recessive trait, and most people with red hair are compound heterozygote or homozygous for limited numbers of mutations that show impaired function in in vitro assays. There is a clear heterozygote effect on sun sensitivity (even in those without red hair) and with susceptibility to the most common forms of skin cancer.
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Affiliation(s)
- T Ha
- Dermatology, University of Edinburgh, Edinburgh EH3 9YW, United Kingdom
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40
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Affiliation(s)
- T Ha
- Department of Dermatology, University of Edinburgh, United Kingdom
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41
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Abstract
Fluorescent resonance energy transfer (FRET) is a powerful technique for studying conformational distribution and dynamics of biological molecules. Some conformational changes are difficult to synchronize or too rare to detect using ensemble FRET. FRET, detected at the single-molecule level, opens up new opportunities to probe the detailed kinetics of structural changes without the need for synchronization. Here, we discuss practical considerations for its implementation including experimental apparatus, fluorescent probe selection, surface immobilization, single-molecule FRET analysis schemes, and interpretation.
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Affiliation(s)
- T Ha
- Department of Physics, Center for Biophysics and Computational Biology, Urbana 61801, USA.
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Lowe E, Rice P, Ha T, Li C, Kelley J, Ensley H, Lopez-Perez J, Kalbfleisch J, Lowman D, Margl P, Browder W, Williams D. A (1-->3)-beta-D-linked heptasaccharide is the unit ligand for glucan pattern recognition receptors on human monocytes. Microbes Infect 2001; 3:789-97. [PMID: 11580973 DOI: 10.1016/s1286-4579(01)01436-8] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [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: 11/18/2022]
Abstract
Glucans are fungal cell wall polysaccharides which stimulate innate immune responses. We determined the minimum unit ligand that would bind to glucan receptors on human U937 cells using laminarin-derived pentaose, hexaose, and heptaose glucan polymers. When U937 membranes were pretreated with the oligosaccharides and passed over a glucan surface, only the heptasaccharide inhibited the interaction of glucan with membrane receptors at a K(d) of 31 microM (95% CI 20-48 microM) and 100% inhibition. However, the glucan heptasaccharide did not stimulate U937 monocyte NFkappaB signaling, nor did it increase survival in a murine model of polymicrobial sepsis. Laminarin, a larger and more complex glucan polymer (M(w) = 7700 g/mol), only partially inhibited binding (61 +/- 4%) at a K(d) of 2.6 microM (99% CI 1.7-4.2 microM) with characteristics of a single binding site. These results indicate that a heptasaccharide is the smallest unit ligand recognized by macrophage glucan receptors. The data also indicate the presence of at least two glucan-binding sites on U937 cells and that the binding sites on human monocyte/macrophages can discriminate between glucan polymers. The heptasaccharide and laminarin were receptor antagonists, but they were not receptor agonists with respect to activation of NFkappaB-dependent signaling pathways or protection against experimental sepsis.
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Affiliation(s)
- E Lowe
- Department of Surgery, James H. Quillen College of Medicine, East Tennessee State University, Johnson City 37614-1708, USA
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Abstract
Single-molecule fluorescence methods and biomechanical tools provide exciting new opportunities to probe biochemical processes in unprecedented detail. The detection and spectroscopy of single fluorophores have recently been used to observe conformational changes and biochemical events involving nucleic acids. A number of fluorescence observables, including localization, quenching, polarization response and fluorescence resonance energy transfer, have been utilized. An exciting new opportunity of combining fluorescence methods and biomechanical tools to study the structural changes and functions of enzymes that participate in nucleic acid metabolism has also arisen.
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Affiliation(s)
- T Ha
- Department of Physics and Center for Biophysics and Computational Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
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Ha T, Lalla S. Allergy in coronary in-stent restenosis. Lancet 2001; 357:1206; author reply 1206-7. [PMID: 11332433 DOI: 10.1016/s0140-6736(00)04351-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Russo-Neustadt A, Ha T, Ramirez R, Kesslak JP. Physical activity-antidepressant treatment combination: impact on brain-derived neurotrophic factor and behavior in an animal model. Behav Brain Res 2001; 120:87-95. [PMID: 11173088 DOI: 10.1016/s0166-4328(00)00364-8] [Citation(s) in RCA: 257] [Impact Index Per Article: 11.2] [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: 10/18/2022]
Abstract
The mechanism of antidepressant action, at the cellular level, is not clearly understood. It has been reported that chronic antidepressant treatment leads to an up-regulation of brain-derived neurotrophic factor (BDNF) mRNA levels in the hippocampus, and that physical activity (voluntary running) enhances this effect. We wished to investigate whether BDNF expression brought about by these interventions may overcome deficits caused by acute stress, and might impact behavior in an animal model. In this report, we have tested the hypothesis that the combination of the antidepressant, tranylcypromine, and physical exercise could lead to decreased neurotrophin deficits and enhanced swimming time in animals that have been forced to swim in an inescapable water tank. Rats were either treated with tranylcypromine, engaged in voluntary running, or both for one week. After these treatments, the animals underwent a two-day forced swimming procedure. BDNF mRNA levels were significantly depressed in untreated animals subjected to forced swimming. Animals that either underwent prior activity or received antidepressant showed BDNF mRNA levels restored to baseline. Animals receiving the combined intervention showed an increase in hippocampal BDNF mRNA well above baseline. Swimming time during a five-minute test was significantly enhanced in animals receiving the combined intervention over untreated animals. Swimming time was not significantly enhanced over that of animals receiving antidepressant alone, however. Enhanced swimming time correlated with increased levels of BDNF mRNA in one hippocampal sub-region (CA4-hilus). These results suggest that the combination of exercise and antidepressant treatment may have significant neurochemical, and possibly behavioral, effects. In addition, these results support the possibility that the enhancement of BDNF expression may be an important element in the clinical response to antidepressant treatment. The induction of BDNF expression by activity/pharmacological treatment combinations could represent an important intervention for further study, to potentially improve depression treatment and management.
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Affiliation(s)
- A Russo-Neustadt
- Department of Biology and Microbiology, California State University, 5151 State University Drive, Los Angeles, CA 90032, USA.
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Abstract
We have demonstrated that in vitro brief ischemia activates nuclear factor (NF)-kappaB in rat myocardium. We report in vivo ischemia-reperfusion (I/R)-induced NF-kappaB activation, IkappaB kinase -beta (IKKbeta) activity, and IkappaBalpha phosphorylation and degradation in rat myocardium. Rat hearts were subjected to occlusion of the coronary artery for up to 45 min or occlusion for 15 min followed by reperfusion for up to 3 h. Cytoplasmic and nuclear proteins were isolated from ischemic and nonischemic areas of each heart. NF-kappaB activation was increased in the ischemic area (680%) after 10 min of ischemia and in the nonischemic area (350%) after 15 min of ischemia and remained elevated during prolonged ischemia and reperfusion. IKKbeta activity was markedly increased in ischemic (1,800%) and nonischemic (860%) areas, and phosphorylated IkappaBalpha levels were significantly elevated in ischemic (180%) and nonischemic (280%) areas at 5 min of ischemia and further increased after reperfusion. IkappaBalpha levels were decreased in the ischemic (45%) and nonischemic (36%) areas after 10 min of ischemia and remained low in the ischemic area during prolonged ischemia and reperfusion. The results suggest that in vivo I/R rapidly induces IKKbeta activity and increases IkappaBalpha phosphorylation and degradation, resulting in NF-kappaB activation in the myocardium.
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Affiliation(s)
- C Li
- Department of Surgery, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee 37614, USA.
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Tomescu D, Kavanagh G, Ha T, Campbell H, Melton DW. Nucleotide excision repair gene XPD polymorphisms and genetic predisposition to melanoma. Carcinogenesis 2001; 22:403-8. [PMID: 11238179 DOI: 10.1093/carcin/22.3.403] [Citation(s) in RCA: 99] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The nucleotide excision repair pathway has evolved to deal with UV light-induced DNA damage. Individuals with the rare inherited nucleotide excision repair deficiency disease xeroderma pigmentosum have a 1000-fold increased incidence of skin cancer. We are interested in the possibility that more subtle changes in nucleotide excision repair genes, resulting in either a reduced capacity for repair or in altered interactions between repair proteins and components of the cell cycle control machinery, might constitute important genetic risk factors for the development of skin cancer in the general population. To investigate this hypothesis we have compared the frequency of polymorphisms in exons 6, 22 and 23 of the XPD gene in melanoma patients and a control group. For each of these two allele polymorphisms one of the alleles was over-represented in the melanoma group and there was a significant association with melanoma. Importantly, this association did not extend to markers immediately flanking the XPD gene, thus providing evidence that XPD gene polymorphisms might predispose to melanoma in the general population. There is a report that one of the polymorphic XPD alleles (exon 23 Lys), which is over-represented in the melanoma group, has reduced repair proficiency and we discuss the possibility that this is the causal change to the XPD gene that predisposes to melanoma.
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Affiliation(s)
- D Tomescu
- Sir Alastair Currie CRC Laboratories, Molecular Medicine Centre, Edinburgh University, Western General Hospital, Crewe Road, Edinburgh EH4 2XU, UK
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Jiang H, Ha T, Wei D. [A study on the mechanism of the biological roles of danshensu on fibroblast]. Zhonghua Shao Shang Za Zhi 2001; 17:36-8. [PMID: 11876909] [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: 02/24/2023]
Abstract
OBJECTIVE To explore the effects of danshensu on fibroblast apoptosis and the expression of procollagen gene. METHODS Danshensu was added to in vitro culture of human cutaneous fibroblasts, and the nuclear proteins and total RNA were harvested from the cells. Electrophoretic mobility shift assay (EMSA) was adopted to determine the combining activity of nuclear transcription factors NF-kB and NF-1. Cell apoptosis was analyzed by DNA ladder fragmentation. The procollagen gene expression was analyzed by RT-PCR. RESULTS Eight hours after the action of danshensu on the culture fibroblasts, the NF-kB combining activity was almost inhibited completely and the NF-1 combining activity decreased by about 50%. In addition, ladder-like DNA fragments were revealed clearly by sepharose electrophoresis. The mRNA levels of type I procollagen alpha1 and alpha2 decreased by 56% and 59%, respectively. CONCLUSION Danshensu could inhibit the nuclear transcription factor NF-kB activity of fibroblast and induce the occurrence of its apoptosis. Furthermore, danshensu could also inhibit the nuclear transcription factor NF-1 activity of fibroblast and modulate the synthesis and secretion of collagen.
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Affiliation(s)
- H Jiang
- Department of Burns and Plastic Surgery, Nanjing Army General Hospital, Nanjing, 210002 P. R. China
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Ha T, Zhuang X, Babcock H, Kim H, Orr JW, Williamson JR, Bartley L, Russell R, Herschlag D, Chu S. The Study of Single Biomolecules with Fluorescence Methods. ACTA ACUST UNITED AC 2001. [DOI: 10.1007/978-3-642-56544-1_19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
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Abstract
By using titin as a model system, we have demonstrated that fluorescence quenching can be used to study protein folding at the single molecule level. The unfolded titin molecules with multiple dye molecules attached are able to fold to the native state. In the native folded state, the fluorescence from dye molecules is quenched due to the close proximity between the dye molecules. Unfolding of the titin leads to a dramatic increase in the fluorescence intensity. Such a change makes the folded and unfolded states of a single titin molecule clearly distinguishable and allows us to measure the folding dynamics of individual titin molecules in real time. We have also shown that fluorescence quenching can signal folding and unfolding of a small protein with only one immunoglobulin domain.
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Affiliation(s)
- X Zhuang
- Department of Physics, Stanford University, Stanford, CA 94305, USA
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