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Lam L, Czer L, Runyan C, Otarola I, Jang J, Lau J, Gau M, Hernandez K, Ngo T, Cole R, Moriguchi J. Outcome of Enoxaparin Bridging in Left Ventricular Assist Devices (LVAD) in an Ambulatory Setting: A Continuation Study at Cedars Sinai Medical Center (CSMC). J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.1380] [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: 04/05/2023] Open
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2
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Karimzadeh M, Ngo T, Lucas B, Zoraghein H. Forecasting COVID-19 and Other Infectious Diseases for Proactive Policy: Artificial Intelligence Can Help. J Urban Health 2023; 100:7-10. [PMID: 36689140 PMCID: PMC9869836 DOI: 10.1007/s11524-022-00714-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/23/2022] [Indexed: 01/24/2023]
Affiliation(s)
- Morteza Karimzadeh
- Department of Geography, Institute of Behavioral Science, University of Colorado Boulder, Boulder, CO, USA.
| | - Thoai Ngo
- Population Council, New York, NY, USA
| | - Benjamin Lucas
- Department of Geography, Institute of Behavioral Science, University of Colorado Boulder, Boulder, CO, USA
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Rodts U, Ngo T, Ros E, Millet L, Malâtre-Lansac A. Characterizing population-based health care needs at the departement level in France. Eur J Public Health 2022. [DOI: 10.1093/eurpub/ckac129.690] [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
Aligning health care spending with population needs is a goal shared by many public health and health care systems. However, most modelling approaches have proven deceptive and ineffective. We propose a novel data-driven, population-based approach to help policymakers explore the discrepancies between spending and needs in France. We leveraged several national open data sources covering demographics, social deprivation, epidemiology, environment, health-related behaviors, and all-payer health care spending (hospital inpatient, prescription medicines, ambulatory events, and dental care). We classified the French “departements” (hereafter counties) into clusters that are homogeneous in terms of health care needs, based on a multidimensional framework. Then, we calculated all-payer per capita health care spending to analyze its within- and between-cluster variation. Based on these findings, we designed a web-based, interactive mapping tool dedicated to French policymakers and payers. The analysis shows 7 clusters of French counties differing in terms of health care needs and spending. The higher-needs/lower-spending and lower-needs/higher spending clusters suggest considerable room for improvement through a regional distribution of spending at least partially based on needs. Most interestingly, the data we used is publicly available, but policymakers lack expertise and time to undergo such analyses themselves. We plan to develop a dynamic and more granular version of the tool to allow policymakers to accurately design and evaluate health care policies.
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Affiliation(s)
- U Rodts
- KanopyMed , Clapiers, France
| | - T Ngo
- KanopyMed , Clapiers, France
| | - E Ros
- Institut Montaigne , Paris, France
| | - L Millet
- Institut Montaigne , Paris, France
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Tranvouez C, Michael M, Hayes W, Sas D, Magen D, Lavsky H, Sellier-Leclerc A, Hogan J, Ngo T, Frishberg Y. Efficacité et sécurité du Lumasiran chez les nourrissons et les jeunes enfants atteints d’hyperoxalurie primaire de type 1 : analyse à 12 mois de l’essai de phase 3 ILLUMINATE-B. Nephrol Ther 2022. [DOI: 10.1016/j.nephro.2022.07.310] [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: 11/25/2022]
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Magen D, Groothoff J, Hulton S, Harambat J, Hogan J, Sellier-Leclerc A, Hayes W, Coenen M, Ngo T, Gansner J, Frishberg Y. POS-438 Long-term Treatment With Lumasiran: Results From the Phase 2 Open-Label Extension Study. Kidney Int Rep 2022. [DOI: 10.1016/j.ekir.2022.01.465] [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: 10/19/2022] Open
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Psaki SR, Melnikas AJ, Haque E, Saul G, Misunas C, Patel SK, Ngo T, Amin S. What Are the Drivers of Child Marriage? A Conceptual Framework to Guide Policies and Programs. J Adolesc Health 2021; 69:S13-S22. [PMID: 34809895 DOI: 10.1016/j.jadohealth.2021.09.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 08/31/2021] [Accepted: 09/04/2021] [Indexed: 11/29/2022]
Abstract
PURPOSE The child marriage field lacks a simplified framework that connects an understanding of the drivers of child marriage for girls to decisions about the design of interventions to delay marriage within different contexts and support married girls. METHODS We reviewed existing child marriage frameworks and conducted consultations with experts working on child marriage. We then developed a simplified conceptual framework describing the key drivers of child marriage for girls. We explored how these drivers play out and interact using qualitative data from three settings where child marriage is common: Bangladesh, Malawi, and Niger. RESULTS The final conceptual framework lays out five core drivers of child marriage for girls, which vary and interact across contexts. Social norms and poverty are shown as core drivers that underlie lack of agency, lack of opportunity, and pregnancy/fear of pregnancy. These drivers reflect community, household, and individual-level factors. The case studies highlight the important relationships between these drivers, and the way they interact within each context. We use these examples to explore how policymakers and practitioners might identify the most appropriate interventions to address child marriage across different settings. CONCLUSIONS We offer this framework as a starting point to guide more targeted interventions and policies that address the complex combination of child marriage drivers within each setting. By adapting this framework to different settings, those designing and implementing child marriage prevention interventions can identify the key drivers in each setting, understand how those drivers interact, and more effectively target effective interventions.
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Affiliation(s)
| | - Andrea J Melnikas
- Poverty, Gender and Youth Program, Population Council, New York, New York
| | | | - Grace Saul
- Poverty, Gender and Youth Program, Population Council, New York, New York
| | | | | | - Thoai Ngo
- GIRL Center, Population Council, New York, New York; Poverty, Gender and Youth Program, Population Council, New York, New York
| | - Sajeda Amin
- Poverty, Gender and Youth Program, Population Council, New York, New York
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Zahra F, Austrian K, Gundi M, Psaki S, Ngo T. Drivers of Marriage and Health Outcomes Among Adolescent Girls and Young Women: Evidence From Sub-Saharan Africa and South Asia. J Adolesc Health 2021; 69:S31-S38. [PMID: 34809897 DOI: 10.1016/j.jadohealth.2021.09.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 08/24/2021] [Accepted: 09/14/2021] [Indexed: 01/01/2023]
Abstract
PURPOSE Previous studies have examined the relationship between age at marriage and health outcomes, but few have explored how marriage drivers are associated with health outcomes. In this study, we examine the relationship between two marriage drivers, premarital pregnancy and agency, and several health outcomes (use of maternal health care services, child health outcomes, and change in depressive symptoms) among married adolescent girls and young women (AGYW) in sub-Saharan Africa and South Asia. METHODS We use three panel data sets collected by the Population Council: the Adolescent Girls Empowerment Program from Zambia (N = 660), the Malawi Schooling and Adolescent Study from Malawi (N = 1,041), and Understanding the Lives of Adolescents and Young Adults from India (N = 894 in Bihar, N = 599 in Uttar Pradesh). Our analytical models use logistic and multinomial logistic regression. RESULTS We find mixed evidence of the association between marriage drivers and health outcomes. Results show that having agency in marital partner choice in India is associated with both an increase and decrease in reported depressive symptoms. In addition, pregnancy before marriage is associated with fewer antenatal visits and hospital-based births in Malawi than pregnancy after marriage. However, we find no evidence that it is associated with worse child health outcomes than pregnancy after marriage in Malawi and Zambia. CONCLUSIONS Overall, our study suggests that the relationship between marriage drivers and AGYW's health outcomes after marriage is not consistent across contexts. We highlight the importance of interpreting marriage drivers within prevailing norms to understand their impact on married AGYW's health.
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Affiliation(s)
- Fatima Zahra
- GIRL Center, Population Council, Washington, DC.
| | | | - Mukta Gundi
- Poverty, Gender, and Youth, Population Council, Delhi, India
| | - Stephanie Psaki
- GIRL Center, Population Council, Washington, DC; Social and Behavioral Science Research, Population Council, New York, NY
| | - Thoai Ngo
- Poverty, Gender, and Youth, Population Council, Delhi, India
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Ngo T, Truong V, Phan T, Pham T, Nguyen T, Le T, Palmer C, Chung E, Mazur W. Normal ranges of global left ventricular myocardial work indices in adults: a meta-analysis. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Non-invasive global myocardial work recently emerged as new parameter to characterize left ventricle function with potential advantages over both ejection fraction and global longitudinal strain.
Purpose
We aimed to perform a meta-analysis of normal ranges of non-invasive left ventricular myocardial work (MW) indices including global constructive work (GCW), global work index (GWI), global wasted work (GWW), and global work efficiency (GWE) and to identify confounding factors that may contribute to variance in reported measures.
Methods
The authors searched four databases, Pubmed, Scopus, Embase, and Cochrane Library through January 2021 using the key terms “myocardial work”,“global constructive work”, “global wasted work”, “global work index”, “global work efficiency”. Studies were included if the articles reported LV myocardial work using 2D transthoracic echocardiography in healthy normal subjects, either in the control group or comprising the entire study cohort. The weighted mean was estimated by using the random effect model with a 95% confidence interval. Heterogeneity across studies was assessed using the I2 test. Publication bias was examined by funnel plot and Egger's regression test.
Results
The search yielded 476 articles. After abstract and full text screening we included 13 datasets with 1665 patients for meta-analysis. The reported normal mean values of GCW and GWI among the studies were 2278 (95% CI, 2167 to 23878; I2=95%), and 2.010 (95% CI, 1922 to 2098, I2=97%), respectively. The mean GWE was 96.0 (95% CI, 95.6% to 96.5; I2=92%), and the mean GWW was 79.7% (95% CI, 68.8% to 90.7%; I2=90%) (Figure). Furthermore, age and gender did not significantly contribute to variations in normal values. No evidence of significant publication bias was observed in the funnel plots and the Egger test.
Conclusion
In this meta-analysis, we provide echocardiographic reference ranges for non-invasive indices of MW. These normal values should serve as a template for clinical and research use for this promising technology.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- T Ngo
- Pham Ngoc Thach University of Medicine, Ho Chi Minh, Viet Nam
| | - V Truong
- The Christ Hospital, Cincinnati, United States of America
| | - T Phan
- Hong Hung Hospital, Tay Ninh, Viet Nam
| | - T Pham
- Tam Anh Hospital, Cardiology, Ho Chi Minh, Viet Nam
| | - T Nguyen
- Pham Ngoc Thach University of Medicine, Ho Chi Minh, Viet Nam
| | - T Le
- Heart institute, Ho Chi Minh, Viet Nam
| | - C Palmer
- The Christ Hospital, Cincinnati, United States of America
| | - E Chung
- The Christ Hospital, Cincinnati, United States of America
| | - W Mazur
- The Christ Hospital, Cincinnati, United States of America
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Ngo T, Spiliotopoulos E, Kolbeck K, Farsad K. Abstract No. 571 Circulating cell-free RNA in plasma enables early detection of acute response to ablation and transarterial therapies for hepatocellular carcinoma. J Vasc Interv Radiol 2021. [DOI: 10.1016/j.jvir.2021.03.381] [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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10
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Coleman JLJ, Ngo T, Smith NJ. Corrigendum to "The G protein-coupled receptor N-terminus and receptor signalling: N-tering a new era" [Cellular Signalling 2017 May;33:1-9]. Cell Signal 2020; 68:109510. [PMID: 31928906 DOI: 10.1016/j.cellsig.2019.109510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- J L J Coleman
- Molecular Pharmacology Group, Victor Chang Cardiac Research Institute, Darlinghurst, NSW 2010, Australia; St Vincent's Clinical School, University of New South Wales, Darlinghurst, NSW 2010, Australia.
| | - T Ngo
- Molecular Pharmacology Group, Victor Chang Cardiac Research Institute, Darlinghurst, NSW 2010, Australia; St Vincent's Clinical School, University of New South Wales, Darlinghurst, NSW 2010, Australia
| | - N J Smith
- Molecular Pharmacology Group, Victor Chang Cardiac Research Institute, Darlinghurst, NSW 2010, Australia; St Vincent's Clinical School, University of New South Wales, Darlinghurst, NSW 2010, Australia.
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Ngo T, Georgescu V, Gervet C, Laurent A, Libourel T, Mercier G. Machine learning application to the reduction of ambulatory care sensitive admissions (ACSA). Eur J Public Health 2019. [DOI: 10.1093/eurpub/ckz187.061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Reducing Ambulatory Care Sensitive Admissions (ACSA) not only enhances patients’ quality of life but could also save substantial costs. ACSA are avoidable admissions for chronic conditions that are associated with socio-economic status, health status, utilization and readiness of primary care service as well as environmental factors. Undoubtedly, health authorities are highly interested in enhancing the health care services in order to reduce the number of ACSA. The objective is to identify the geographic areas where the primary care workforce should be increased in order to maximize the decrease in ACSA.
Methods
Using ambulatory care and inpatient claims data as well as contextual variables, we apply support vector machine regression (SVR) to select the geographic areas (fr. Bassins de vie - BVs) and the number of to-be-added primary care nurses that maximize the ACSA reduction. We also take into account the constraints related to budget and the equality of health care access. Particularly, there are three possible constraints: (1) the total number of nurses can be added in the whole region; (2) the maximum number of the nurses can be added at each area; (3) the maximum density of nurses (numbers of the nurses per 10,000 habitants) can be reached at each area. The results are visualized using spatial maps.
Preliminary results
In 2014, 27,000 ACSA occurred in the Occitanie, France region. For a specific set of constraints values, the model identified 16 BVs (out of 201) where the addition of 30 nurses could lead to the maximum ACSA reduction in number which is 17.
Conclusions
In the French Occitanie region, our SVR model was able to target a small number of geographic areas to maximize the impact of increased primary care workforce on ACSA. Our approach is applied to a single region, and it can be applied to other regions or extended at the national level as well as to other countries.
Key messages
A decision support tool to help health authorities in locating primary health care resources for the maximum reduction of ambulatory care sensitive admissions. An application of machine learning in primary care services.
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Affiliation(s)
- T Ngo
- Economic Evaluation Unit, University Hospital of Montpellier, Montpellier, France
- LIRMM, University of Montpellier, Montpellier, France
| | - V Georgescu
- Economic Evaluation Unit, University Hospital of Montpellier, Montpellier, France
| | - C Gervet
- Espace-Dev, University of Montpellier, Montpellier, France
| | - A Laurent
- LIRMM, University of Montpellier, Montpellier, France
| | - T Libourel
- Espace-Dev, University of Montpellier, Montpellier, France
| | - G Mercier
- Economic Evaluation Unit, University Hospital of Montpellier, Montpellier, France
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Deprez C, Roullet-Renoleau F, Politis B, Ngo T, Gueylard Chenevier D. PS-091 Benefits of medicines reconciliation in an emergency unit. Eur J Hosp Pharm 2015. [DOI: 10.1136/ejhpharm-2015-000639.414] [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: 11/03/2022] Open
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MacKerell AD, Bashford D, Bellott M, Dunbrack RL, Evanseck JD, Field MJ, Fischer S, Gao J, Guo H, Ha S, Joseph-McCarthy D, Kuchnir L, Kuczera K, Lau FT, Mattos C, Michnick S, Ngo T, Nguyen DT, Prodhom B, Reiher WE, Roux B, Schlenkrich M, Smith JC, Stote R, Straub J, Watanabe M, Wiórkiewicz-Kuczera J, Yin D, Karplus M. All-atom empirical potential for molecular modeling and dynamics studies of proteins. J Phys Chem B 2014; 102:3586-616. [PMID: 24889800 DOI: 10.1021/jp973084f] [Citation(s) in RCA: 11569] [Impact Index Per Article: 1156.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
New protein parameters are reported for the all-atom empirical energy function in the CHARMM program. The parameter evaluation was based on a self-consistent approach designed to achieve a balance between the internal (bonding) and interaction (nonbonding) terms of the force field and among the solvent-solvent, solvent-solute, and solute-solute interactions. Optimization of the internal parameters used experimental gas-phase geometries, vibrational spectra, and torsional energy surfaces supplemented with ab initio results. The peptide backbone bonding parameters were optimized with respect to data for N-methylacetamide and the alanine dipeptide. The interaction parameters, particularly the atomic charges, were determined by fitting ab initio interaction energies and geometries of complexes between water and model compounds that represented the backbone and the various side chains. In addition, dipole moments, experimental heats and free energies of vaporization, solvation and sublimation, molecular volumes, and crystal pressures and structures were used in the optimization. The resulting protein parameters were tested by applying them to noncyclic tripeptide crystals, cyclic peptide crystals, and the proteins crambin, bovine pancreatic trypsin inhibitor, and carbonmonoxy myoglobin in vacuo and in crystals. A detailed analysis of the relationship between the alanine dipeptide potential energy surface and calculated protein φ, χ angles was made and used in optimizing the peptide group torsional parameters. The results demonstrate that use of ab initio structural and energetic data by themselves are not sufficient to obtain an adequate backbone representation for peptides and proteins in solution and in crystals. Extensive comparisons between molecular dynamics simulations and experimental data for polypeptides and proteins were performed for both structural and dynamic properties. Energy minimization and dynamics simulations for crystals demonstrate that the latter are needed to obtain meaningful comparisons with experimental crystal structures. The presented parameters, in combination with the previously published CHARMM all-atom parameters for nucleic acids and lipids, provide a consistent set for condensed-phase simulations of a wide variety of molecules of biological interest.
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Affiliation(s)
- A D MacKerell
- Department of Chemistry & Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, Department of Pharmaceutical Sciences, University of Maryland, School of Pharmacy, Baltimore, Maryland 21201, and Laboratoire de Chimie Biophysique, ISIS, Institut Le Bel, Université Louis Pasteur, 67000 Strasbourg, France
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Matson J, Chou W, Ngo T, Gershon PD. Static and dynamic protein phosphorylation in the Vaccinia virion. Virology 2014; 452-453:310-23. [PMID: 24606709 DOI: 10.1016/j.virol.2014.01.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [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: 10/31/2013] [Revised: 12/02/2013] [Accepted: 01/17/2014] [Indexed: 11/19/2022]
Abstract
To the best of our knowledge, two phosphorylation sites have been reported previously, among 11 known Vaccinia virus phosphoproteins. Here, via phosphopeptide mass spectrometry, up to 189 phosphorylation sites were identified among 48 proteins in preparations of purified Vaccinia mature virus (MV). 8.5% of phospho-residues were pTyr. Viral phosphoproteins were found in diverse functional classes, including structural proteins, membrane proteins and RNA polymerase subunits. Among the nine identified membrane phosphoproteins, the sites in just one, namely A14L, were deduced to be internal with respect to the accompanying membrane. Examination of sites in known substrates of the Vaccinia-encoded protein kinase VPK2, indicated VPK2 to be a proline-dependent kinase. The MV phosphoproteome was enriched in potential substrates of cellular kinases belonging to the CDK2/CDK3, CK2, and p38 groups. Quantitative mass spectrometry identified several sites that became phosphorylated during intravirion kinase activation in vitro, each showing one of two distinct pH-dependency profiles.
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Affiliation(s)
- J Matson
- University of North Carolina, Chapel Hill, NC, United States
| | - W Chou
- Department of Molecular Biology and Biochemistry, UC-Irvine, Irvine, CA 92697, United States
| | - T Ngo
- Department of Molecular Biology and Biochemistry, UC-Irvine, Irvine, CA 92697, United States
| | - P D Gershon
- Department of Molecular Biology and Biochemistry, UC-Irvine, Irvine, CA 92697, United States.
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Yamashita Y, Okano Y, Ngo T, Buche P, Sirvent A, Girard F, Masaki H. Differences in susceptibility to oxidative stress in the skin of Japanese and French subjects and physiological characteristics of their skin. Skin Pharmacol Physiol 2012; 25:78-85. [PMID: 22236795 DOI: 10.1159/000335259] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2011] [Accepted: 11/17/2011] [Indexed: 11/19/2022]
Abstract
BACKGROUND Many researchers have studied differences in conditions of ethnic skin using biophysical measurements. However, few studies to date have focused on the antioxidative capacity of the skin. METHODS We measured two parameters of oxidative stress in the stratum corneum, catalase activity and protein carbonylation of the stratum corneum (SCCP), in two ethnic groups, Japanese and French subjects, to characterize the susceptibility to oxidative stress. We also measured several physiological parameters at three different skin sites, two sun-exposed sites (cheek and dorsal aspect of the hand) and a sun-protected site (inner upper arm), in both ethnic groups. RESULTS Transepidermal water loss (TEWL), the size of corneocytes and skin color showed differences between sun-exposed and sun-protected sites regardless of ethnicity. Regarding ethnic differences, catalase activities and parameters of skin hydration and barrier function of Japanese subjects were higher than those of French subjects. However, SCCP values showed a trend contrary to catalase activity. The difference in the b* value indicated that the melanin content of Japanese skin was higher than that of French skin. Pearson's correlation analyses showed that catalase activity and SCCP values had weak relationships with water content, TEWL and skin color in both ethnic groups. CONCLUSION Differences in susceptibility to oxidative stress, namely melanin content and catalase activity in the skin, induce the better skin condition of Japanese compared with French subjects.
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Affiliation(s)
- Y Yamashita
- Nikkol Group, Nikoderm Research Inc., Osaka, Japan.
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Pelletier DL, Frongillo EA, Gervais S, Hoey L, Menon P, Ngo T, Stoltzfus RJ, Ahmed AMS, Ahmed T. Nutrition agenda setting, policy formulation and implementation: lessons from the Mainstreaming Nutrition Initiative. Health Policy Plan 2011; 27:19-31. [DOI: 10.1093/heapol/czr011] [Citation(s) in RCA: 123] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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17
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Riordan S, Abrahamyan S, Craver B, Kelleher A, Kolarkar A, Miller J, Cates GD, Liyanage N, Wojtsekhowski B, Acha A, Allada K, Anderson B, Aniol KA, Annand JRM, Arrington J, Averett T, Beck A, Bellis M, Boeglin W, Breuer H, Calarco JR, Camsonne A, Chen JP, Chudakov E, Coman L, Crowe B, Cusanno F, Day D, Degtyarenko P, Dolph PAM, Dutta C, Ferdi C, Fernández-Ramírez C, Feuerbach R, Fraile LM, Franklin G, Frullani S, Fuchs S, Garibaldi F, Gevorgyan N, Gilman R, Glamazdin A, Gomez J, Grimm K, Hansen JO, Herraiz JL, Higinbotham DW, Holmes R, Holmstrom T, Howell D, de Jager CW, Jiang X, Jones MK, Katich J, Kaufman LJ, Khandaker M, Kelly JJ, Kiselev D, Korsch W, LeRose J, Lindgren R, Markowitz P, Margaziotis DJ, Beck SMT, Mayilyan S, McCormick K, Meziani ZE, Michaels R, Moffit B, Nanda S, Nelyubin V, Ngo T, Nikolenko DM, Norum B, Pentchev L, Perdrisat CF, Piasetzky E, Pomatsalyuk R, Protopopescu D, Puckett AJR, Punjabi VA, Qian X, Qiang Y, Quinn B, Rachek I, Ransome RD, Reimer PE, Reitz B, Roche J, Ron G, Rondon O, Rosner G, Saha A, Sargsian MM, Sawatzky B, Segal J, Shabestari M, Shahinyan A, Shestakov Y, Singh J, Sirca S, Souder P, Stepanyan S, Stibunov V, Sulkosky V, Tajima S, Tobias WA, Udias JM, Urciuoli GM, Vlahovic B, Voskanyan H, Wang K, Wesselmann FR, Vignote JR, Wood SA, Wright J, Yao H, Zhu X. Measurements of the electric form factor of the neutron up to Q2=3.4 GeV2 using the reaction 3He(e,e'n)pp. Phys Rev Lett 2010; 105:262302. [PMID: 21231649 DOI: 10.1103/physrevlett.105.262302] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2010] [Indexed: 02/05/2023]
Abstract
The electric form factor of the neutron was determined from studies of the reaction 3He(e,e'n)pp in quasielastic kinematics in Hall A at Jefferson Lab. Longitudinally polarized electrons were scattered off a polarized target in which the nuclear polarization was oriented perpendicular to the momentum transfer. The scattered electrons were detected in a magnetic spectrometer in coincidence with neutrons that were registered in a large-solid-angle detector. More than doubling the Q2 range over which it is known, we find G(E)(n)=0.0236±0.0017(stat)±0.0026(syst), 0.0208±0.0024±0.0019, and 0.0147±0.0020±0.0014 for Q(2)=1.72, 2.48, and 3.41 GeV2, respectively.
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Affiliation(s)
- S Riordan
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
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Pelage J, Hess A, Ngo T, Mitry E, Chinet T, Lacombe P. Abstract No. 76: Radiofrequency Ablation of Lung Tumors Using 17G Needles. J Vasc Interv Radiol 2009. [DOI: 10.1016/j.jvir.2008.12.065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Abstract
The formation of zinc-chlorophyll-derivative complexes was investigated in peels-on green D'Anjou pears when subjected to blanching in zinc ion solution (1300, 2600, and 0 ppm) at 94 degrees C for 6, 12, or 18 min and then canning at 94 degrees C for 20 min. The peels removed from the pears were freeze-dried and ground into powders in liquid nitrogen for pigment extraction using ethyl ether. The visual absorption of the extracts was measured using a spectrophotometer along with identification and quantification of chlorophyll derivatives using reverse-phase HPLC method. Furthermore, pears with or without the peels were blanched in 2600 ppm of zinc solution for 12 min following the canning process in 10 degree Brix syrup solution. Total antioxidant (TA) and total phenolic content (TPC) of the pear flesh and peels were evaluated using Folin-Ciocalteu's phenol and 1,1-diphenyl-2-picrylhydrazyl assays. Thermal processing destroyed chlorophylls on pear peels, in which pheophytins were found to be the major degraded compounds while an insignificant amount of pyropheophytins was also formed. In zinc blanched peels, Zn pheophytins a was the dominant green compound, and its amount increased about 100% and 144.4% in peels blanched in 1300 ppm zinc solution for 6 and 12 min, respectively. When blanching peels in 2600 ppm zinc solution for 6 and 12 min, the pigment increased about 118% and 242%, respectively. Significant reductions in TA and TPC were found on the peels of zinc treated pears, but the overall TA and TPC of whole fruits were not significantly affected by the treatments.
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Affiliation(s)
- T Ngo
- Dept. of Food Science & Technology, 100 Wiegand Hall, Oregon State Univ., Corvallis, OR 97331-6602, USA
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Ridge KD, Marino JP, Ngo T, Ramon E, Brabazon DM, Abdulaev NG. NMR analysis of rhodopsin–transducin interactions. Vision Res 2006; 46:4482-92. [PMID: 16979691 DOI: 10.1016/j.visres.2006.07.024] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [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] [Received: 06/14/2006] [Revised: 07/22/2006] [Accepted: 07/26/2006] [Indexed: 12/20/2022]
Abstract
Heterotrimeric G-protein activation by an agonist-stimulated G-protein coupled receptor (R*) requires the propagation of structural signals from the receptor interacting surfaces to the guanine nucleotide-binding pocket. Employing high-resolution NMR methods, we are probing heterotrimer-associated and rhodopsin-stimulated changes in an isotope-labeled G-protein alpha-subunit (G(alpha)). A key aspect of the work involves the trapping and interrogation of discrete R*-bound conformations of G(alpha). Our results demonstrate that functionally important changes in G(alpha) structure and dynamics can be detected and characterized by NMR, enabling the generation of robust models for the global and local structural changes accompanying signal transfer from R* to the G-protein.
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Affiliation(s)
- K D Ridge
- Center for Membrane Biology, Department of Biochemistry and Molecular Biology, University of Texas Health Science Center, Houston, TX 77030, USA.
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Afghani B, Ngo T, Zeitany R, Amin A. 452 PALIVIZUMAB: ADHERENCE TO AMERICAN ACADEMY OF PEDIATRICS GUIDELINES.:. J Investig Med 2006. [DOI: 10.2310/6650.2005.x0004.451] [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: 11/18/2022]
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Abstract
BACKGROUND The authors evaluated the antibacterial effectiveness of laser instrumentation and rotary instrumentation of anterior, single-rooted teeth infected with Enterococcus faecalis. METHODS The authors divided 35 infected samples into five groups: Group A: inoculation, laser, 17 percent ethylene-diamine-tetra-acetate (EDTA), 2.5 percent sodium hypochlorite (NaOCl) (n=10); Group B: inoculation, laser, 17 percent EDTA, sterile saline (n = 10); Group C: inoculation, rotary, 17 percent EDTA, 2.5 percent NaOCl (n=10); Group D: inoculation, no instrumentation (positive control) (n=5); Group E: no inoculation, no instrumentation (negative control) (n=5). They sampled and incubated dentin shavings from each canal for bacterial growth. RESULTS In Group A, eight tubes were positive for bacterial growth. In Group B, 10 tubes were positive for bacterial growth. In Group C, six tube were positive for bacterial growth. In Group D, all of the tubes were positive for bacterial growth. In Group E, no tubes showed bacterial growth. The Fisher exact test showed no significant differences among groups A, E and C. CONCLUSION Neither the laser nor the rotary instrumentation was able to eliminate endodontic infection. CLINICAL IMPLICATIONS Although lasers have been presented as high-tech tools for disinfecting root canals, the laser was ineffective in this study.
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Affiliation(s)
- D Jha
- Division of Endodontics, School of Dental and Oral Surgery, Columbia University, 630 West 168th St., P.O. Box, 20 (PH7E-117), New York, NY 10032, USA.
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Afghani B, Ngo T, Zeitany R, Amin A. Premature Infants who Get Hospitalized for Respiratory Syncytial Virus Infection despite Receiving Palivizumab. J Investig Med 2006. [DOI: 10.1177/108155890605401s193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- B. Afghani
- University of California, Irvine Medical Center, Orange, CA
| | - T. Ngo
- University of California, Irvine Medical Center, Orange, CA
| | - R. Zeitany
- University of California, Irvine Medical Center, Orange, CA
| | - A. Amin
- University of California, Irvine Medical Center, Orange, CA
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Afghani B, Ngo T, Zeitany R, Amin A. 310 PREMATURE INFANTS WHO GET HOSPITALIZED FOR RESPIRATORY SYNCYTIAL VIRUS INFECTION DESPITE RECEIVING PALIVIZUMAB. J Investig Med 2006. [DOI: 10.2310/6650.2005.x0004.309] [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: 11/18/2022]
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Kuchenbauer F, Ngo T, Muth A, Stötzer O, Hiller E. [29-year-old female patient with pneumonia and enlarged abdominal lymph nodes]. Internist (Berl) 2005; 46:917-8, 920-2. [PMID: 15925964 DOI: 10.1007/s00108-005-1430-9] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Common variable immunodeficiency (CVID) is the most common clinically manifested primary immunodeficiency disease. A 29-year-old female patient presented with pneumonia and enlarged thoracal and abdominal lymph nodes. Frequently recurring infections, especially in the respiratory tract were observed in the patient's history. A hypogammaglobulinaemia could be detected. By exclusion of other disorders and a complete analysis of the immune status a CVID Ib/B was diagnosed. Regular ambulatory treatment with immune globulin substitution reduced the incidence and severity of infections.
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Affiliation(s)
- F Kuchenbauer
- III. Medizinische Klinik, Universitätsklinikum Grosshadern der LMU München, Germany.
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Lin NU, Broadwater G, Dressler LG, Schnitt S, Lara J, Bleiweiss I, Ngo T, Miron A, Winer E, Harris LN. The predictive value of HER2 and p53 on outcomes after paclitaxel chemotherapy for metastatic breast cancer: Results from CALGB 9342. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.9562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- N. U. Lin
- Cancer and Leukemia Group B, Chicago, IL
| | | | | | - S. Schnitt
- Cancer and Leukemia Group B, Chicago, IL
| | - J. Lara
- Cancer and Leukemia Group B, Chicago, IL
| | | | - T. Ngo
- Cancer and Leukemia Group B, Chicago, IL
| | - A. Miron
- Cancer and Leukemia Group B, Chicago, IL
| | - E. Winer
- Cancer and Leukemia Group B, Chicago, IL
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Affiliation(s)
- J M Gargano
- Department of Chemistry, Syracuse University, Syracuse, New York 13244, USA
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Keppler OT, Yonemoto W, Welte FJ, Patton KS, Iacovides D, Atchison RE, Ngo T, Hirschberg DL, Speck RF, Goldsmith MA. Susceptibility of rat-derived cells to replication by human immunodeficiency virus type 1. J Virol 2001; 75:8063-73. [PMID: 11483751 PMCID: PMC115050 DOI: 10.1128/jvi.75.17.8063-8073.2001] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.5] [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: 11/20/2022] Open
Abstract
Progress in developing a small animal model of human immunodeficiency virus type 1 (HIV-1) disease would greatly facilitate studies of transmission, pathogenesis, host immune responses, and antiviral strategies. In this study, we have explored the potential of rats as a susceptible host. In a single replication cycle, rat cell lines Rat2 and Nb2 produced infectious virus at levels 10- to 60-fold lower than those produced by human cells. Rat-derived cells supported substantial levels of early HIV-1 gene expression, which was further enhanced by overexpression of human cyclin T1. Rat cells displayed quantitative, qualitative, and cell-type-specific limitations in the late phase of the HIV-1 replication cycle including relative expression levels of HIV-1 Gag proteins, intracellular Gag processing, and viral egress. Nb2 cells were rendered permissive to HIV-1 R5 viruses by coexpression of human CD4 and CCR5, indicating that the major restriction on HIV-1 replication was at the level of cellular entry. We also found that primary rat lymphocytes, macrophages, and microglia expressed considerable levels of early HIV-1 gene products following infection with pseudotyped HIV-1. Importantly, primary rat macrophages and microglia, but not lymphocytes, also expressed substantial levels of HIV-1 p24 CA and produced infectious virions. Collectively, these results identify the rat as a promising candidate for a transgenic small animal model of HIV-1 infection and highlight pertinent cell-type-specific restrictions that are features of this species.
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Affiliation(s)
- O T Keppler
- Gladstone Institute of Virology and Immunology, School of Medicine, University of California San Francisco, San Francisco, California 94141-9100, USA
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Ackermann KH, Adams N, Adler C, Ahammed Z, Ahmad S, Allgower C, Amsbaugh J, Anderson M, Anderssen E, Arnesen H, Arnold L, Averichev GS, Baldwin A, Balewski J, Barannikova O, Barnby LS, Baudot J, Beddo M, Bekele S, Belaga VV, Bellwied R, Bennett S, Bercovitz J, Berger J, Betts W, Bichsel H, Bieser F, Bland LC, Bloomer M, Blyth CO, Boehm J, Bonner BE, Bonnet D, Bossingham R, Botlo M, Boucham A, Bouillo N, Bouvier S, Bradley K, Brady FP, Braithwaite ES, Braithwaite W, Brandin A, Brown RL, Brugalette G, Byrd C, Caines H, Calderón de la Barca Sánchez M, Cardenas A, Carr L, Carroll J, Castillo J, Caylor B, Cebra D, Chatopadhyay S, Chen ML, Chen W, Chen Y, Chernenko SP, Cherney M, Chikanian A, Choi B, Chrin J, Christie W, Coffin JP, Conin L, Consiglio C, Cormier TM, Cramer JG, Crawford HJ, Danilov VI, Dayton D, DeMello M, Deng WS, Derevschikov AA, Dialinas M, Diaz H, DeYoung PA, Didenko L, Dimassimo D, Dioguardi J, Dominik W, Drancourt C, Draper JE, Dunin VB, Dunlop JC, Eckardt V, Edwards WR, Efimov LG, Eggert T, Emelianov V, Engelage J, Eppley G, Erazmus B, Etkin A, Fachini P, Feliciano C, Ferenc D, Ferguson MI, Fessler H, Finch E, Fine V, Fisyak Y, Flierl D, Flores I, Foley KJ, Fritz D, Gagunashvili N, Gans J, Gazdzicki M, Germain M, Geurts F, Ghazikhanian V, Gojak C, Grabski J, Grachov O, Grau M, Greiner D, Greiner L, Grigoriev V, Grosnick D, Gross J, Guilloux G, Gushin E, Hall J, Hallman TJ, Hardtke D, Harper G, Harris JW, He P, Heffner M, Heppelmann S, Herston T, Hill D, Hippolyte B, Hirsch A, Hjort E, Hoffmann GW, Horsley M, Howe M, Huang HZ, Humanic TJ, Hümmler H, Hunt W, Hunter J, Igo GJ, Ishihara A, Ivanshin YI, Jacobs P, Jacobs WW, Jacobson S, Jared R, Jensen P, Johnson I, Jones PG, Judd E, Kaneta M, Kaplan M, Keane D, Kenney VP, Khodinov A, Klay J, Klein SR, Klyachko A, Koehler G, Konstantinov AS, Kormilitsyne V, Kotchenda L, Kotov I, Kovalenko AD, Kramer M, Kravtsov P, Krueger K, Krupien T, Kuczewski P, Kuhn C, Kunde GJ, Kunz CL, Kutuev RK, Kuznetsov AA, Lakehal-Ayat L, Lamas-Valverde J, Lamont MA, Landgraf JM, Lange S, Lansdell CP, Lasiuk B, Laue F, Lebedev A, LeCompte T, Leonhardt WJ, Leontiev VM, Leszczynski P, LeVine MJ, Li Q, Li Q, Li Z, Liaw CJ, Lin J, Lindenbaum SJ, Lindenstruth V, Lindstrom PJ, Lisa MA, Liu H, Ljubicic T, Llope WJ, LoCurto G, Long H, Longacre RS, Lopez-Noriega M, Lopiano D, Love WA, Lutz JR, Lynn D, Madansky L, Maier R, Majka R, Maliszewski A, Margetis S, Marks K, Marstaller R, Martin L, Marx J, Matis HS, Matulenko YA, Matyushevski EA, McParland C, McShane TS, Meier J, Melnick Y, Meschanin A, Middlekamp P, Mikhalin N, Miller B, Milosevich Z, Minaev NG, Minor B, Mitchell J, Mogavero E, Moiseenko VA, Moltz D, Moore CF, Morozov V, Morse R, de Moura MM, Munhoz MG, Mutchler GS, Nelson JM, Nevski P, Ngo T, Nguyen M, Nguyen T, Nikitin VA, Nogach LV, Noggle T, Norman B, Nurushev SB, Nussbaum T, Nystrand J, Odyniec G, Ogawa A, Ogilvie CA, Olchanski K, Oldenburg M, Olson D, Ososkov GA, Ott G, Padrazo D, Paic G, Pandey SU, Panebratsev Y, Panitkin SY, Pavlinov AI, Pawlak T, Pentia M, Perevotchikov V, Peryt W, Petrov VA, Pinganaud W, Pirogov S, Platner E, Pluta J, Polk I, Porile N, Porter J, Poskanzer AM, Potrebenikova E, Prindle D, Pruneau C, Puskar-Pasewicz J, Rai G, Rasson J, Ravel O, Ray RL, Razin SV, Reichhold D, Reid J, Renfordt RE, Retiere F, Ridiger A, Riso J, Ritter HG, Roberts JB, Roehrich D, Rogachevski OV, Romero JL, Roy C, Russ D, Rykov V, Sakrejda I, Sanchez R, Sandler Z, Sandweiss J, Sappenfield P, Saulys AC, Savin I, Schambach J, Scharenberg RP, Scheblien J, Scheetz R, Schlueter R, Schmitz N, Schroeder LS, Schulz M, Schüttauf A, Sedlmeir J, Seger J, Seliverstov D, Seyboth J, Seyboth P, Seymour R, Shakaliev EI, Shestermanov KE, Shi Y, Shimanskii SS, Shuman D, Shvetcov VS, Skoro G, Smirnov N, Smykov LP, Snellings R, Solberg K, Sowinski J, Spinka HM, Srivastava B, Stephenson EJ, Stock R, Stolpovsky A, Stone N, Stone R, Strikhanov M, Stringfellow B, Stroebele H, Struck C, Suaide AA, Sugarbaker E, Suire C, Symons TJ, Takahashi J, Tang AH, Tarchini A, Tarzian J, Thomas JH, Tikhomirov V, Szanto De Toledo A, Tonse S, Trainor T, Trentalange S, Tokarev M, Tonjes MB, Trofimov V, Tsai O, Turner K, Ullrich T, Underwood DG, Vakula I, Van Buren G, VanderMolen AM, Vanyashin A, Vasilevski IM, Vasiliev AN, Vigdor SE, Visser G, Voloshin SA, Vu C, Wang F, Ward H, Weerasundara D, Weidenbach R, Wells R, Wells R, Wenaus T, Westfall GD, Whitfield JP, Whitten C, Wieman H, Willson R, Wilson K, Wirth J, Wisdom J, Wissink SW, Witt R, Wolf J, Wood L, Xu N, Xu Z, Yakutin AE, Yamamoto E, Yang J, Yepes P, Yokosawa A, Yurevich VI, Zanevski YV, Zhang J, Zhang WM, Zhu J, Zimmerman D, Zoulkarneev R, Zubarev AN. Elliptic flow in Au+Au collisions at square root(S)NN = 130 GeV. Phys Rev Lett 2001; 86:402-407. [PMID: 11177841 DOI: 10.1103/physrevlett.86.402] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2000] [Indexed: 05/23/2023]
Abstract
Elliptic flow from nuclear collisions is a hadronic observable sensitive to the early stages of system evolution. We report first results on elliptic flow of charged particles at midrapidity in Au+Au collisions at square root(S)NN = 130 GeV using the STAR Time Projection Chamber at the Relativistic Heavy Ion Collider. The elliptic flow signal, v2, averaged over transverse momentum, reaches values of about 6% for relatively peripheral collisions and decreases for the more central collisions. This can be interpreted as the observation of a higher degree of thermalization than at lower collision energies. Pseudorapidity and transverse momentum dependence of elliptic flow are also presented.
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Abstract
This study focused on 19 patients with renal lymphoma (RL) from whom 20 initial (1 patient with fine-needle aspiration [FNA] specimens of masses in both kidneys) and 1 repeated FNA specimen were obtained. Of the 19 patients, 10 had secondary RL, 8 primary RL, and 1 transplant RL. The FNA samples were studied by smears (all cases), tissues (11), phenotyping by immunostaining (13) or flow cytometry (4), and gene rearrangement (3). The final diagnoses included 1 T-cell lymphoma and 18 B-cell lymphomas. Of the 20 original specimens, 14 were reported as positive for lymphoma, 3 suggestive of lymphoma, 1 positive for transitional cell carcinoma, and 2 unsatisfactory. The follow-up specimen showed reactive changes. Tissue correlation, available in 11 cases, confirmed a positive cytodiagnosis (7), provided a final diagnosis in the cytologically inconclusive cases (3), or revised the misdiagnosis of transitional cell carcinoma from smears (1). The phenotyping elucidated the B vs T lineage of the lymphoma in all tested cases, confirmed the positive cytodiagnosis in 10 cases, confirmed the reactive cytodiagnosis in 1 case, and helped achieve a conclusive diagnosis in 2 cases suggestive of lymphoma. Gene rearrangement studies showed light chain restriction in the 2 tested cases. FNA has an essential role in treatment planning for RL. Although FNA usually is diagnostically conclusive, a high index of suspicion and awareness of atypical or misleading cytomorphologic features are important for a correct interpretation, especially for primary RL. Ancillary testing is essential for the diagnosis in problematic cases and lays the foundation for the differential diagnosis.
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Affiliation(s)
- L D Truong
- Department of Pathology, Baylor College of Medicine, Houston, TX, USA
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Abdulaev NG, Ngo T, Chen R, Lu Z, Ridge KD. Functionally discrete mimics of light-activated rhodopsin identified through expression of soluble cytoplasmic domains. J Biol Chem 2000; 275:39354-63. [PMID: 10988291 DOI: 10.1074/jbc.m005642200] [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: 11/06/2022] Open
Abstract
Numerous studies on the seven-helix receptor rhodopsin have implicated the cytoplasmic loops and carboxyl-terminal region in the binding and activation of proteins involved in visual transduction and desensitization. In our continuing studies on rhodopsin folding, assembly, and structure, we have attempted to reconstruct the interacting surface(s) for these proteins by inserting fragments corresponding to the cytoplasmic loops and/or the carboxyl-terminal tail of bovine opsin either singly, or in combination, onto a surface loop in thioredoxin. The purpose of the thioredoxin fusion is to provide a soluble scaffold for the cytoplasmic fragments thereby allowing them sufficient conformational freedom to fold to a structure that mimics the protein-binding sites on light-activated rhodopsin. All of the fusion proteins are expressed to relatively high levels in Escherichia coli and can be purified using a two- or three-step chromatography procedure. Biochemical studies show that some of the fusion proteins effectively mimic the activated conformation(s) of rhodopsin in stimulating G-protein or competing with the light-activated rhodopsin/G-protein interaction, in supporting phosphorylation of the carboxyl-terminal opsin fragment by rhodopsin kinase, and/or phosphopeptide-stimulated arrestin binding. These results suggest that specific segments of the cytoplasmic surface of rhodopsin can adopt functionally discrete conformations in the absence of the connecting transmembrane helices and retinal chromophore.
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Affiliation(s)
- N G Abdulaev
- Center for Advanced Research in Biotechnology, National Institute of Standards and Technology and the University of Maryland Biotechnology Institute, Rockville, Maryland 20850, USA
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Beals D, Ngo T, Feng Y, Cook D, Grau DG, Weber DA. Development and laboratory evaluation of a new toothbrush with a novel brush head design. Am J Dent 2000; 13:5A-14A. [PMID: 11763943] [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: 02/23/2023]
Abstract
Despite many developments in manual toothbrush design, plaque removal at the back of the mouth and at approximal surfaces remains inadequate, yet it is at these sites in particular that plaque accumulates and leads to the development of gingival disease. Improved oral hygiene can be achieved by better brushing technique and by increasing brushing time, but a change in behavior patterns is almost impossible to achieve for the majority of individuals. What is required is a brush head design that maximizes plaque removal, regardless of how the user brushes. As a result of a detailed investigation into the action of bistles during brushing, the Oral-B CrossAction toothbrush has been developed. It incorporates bristles angled at 16 degrees in a unique CrissCross design arranged along the horizontal axis of the toothbrush. Laboratory studies have demonstrated that this development significantly enhances interproximal penetration and cleaning effectiveness when compared with an identical brush head with vertical rather than angled bristles. Laboratory comparisons with more than 80 leading manual toothbrushes from around the world demonstrate a consistent, significant advantage for the new CrossAction toothbrush, both with respect to interproximal penetration and cleaning effectiveness. These results suggest that the CrossAction toothbrush has the potential to remove greater amounts of plaque, especially from the approximal surfaces, than conventional toothbrushes incorporating vertical bristles or more traditional tuft designs.
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Affiliation(s)
- D Beals
- Oral-B Laboratories, Belmont, CA 94002, USA
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Ridge KD, Ngo T, Lee SS, Abdulaev NG. Folding and assembly in rhodopsin. Effect of mutations in the sixth transmembrane helix on the conformation of the third cytoplasmic loop. J Biol Chem 1999; 274:21437-42. [PMID: 10409707 DOI: 10.1074/jbc.274.30.21437] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [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: 11/06/2022] Open
Abstract
Previous studies on bovine opsin folding and assembly have identified an amino-terminal fragment, EF(1-232), which folds and inserts into a membrane only after coexpression with its complementary carboxyl-terminal fragment, EF(233-348). To further characterize this interaction, EF(1-232) production was examined upon coexpression with carboxyl-terminal fragments of varying length and/or amino acid composition. These included fragments with incremental deletions of the third cytoplasmic loop (TH(241-348) and EF(249-348)), a fragment composed of the third cytoplasmic loop and sixth transmembrane helix (HF(233-280)), a fragment composed of the sixth and seventh transmembrane helices (FG(249-312)), and EF(233-348) and TH(241-348) fragments with Pro-267 or Trp-265 mutations. Although EF(1-232) production was independent of the third cytoplasmic loop and carboxyl-terminal tail, both the sixth and seventh transmembrane helices were essential. The effects of mutations in the sixth transmembrane helix on EF(1-232) expression were dependent on the length of the third cytoplasmic loop. Although Pro-267 mutations in EF(233-348) failed to stabilize EF(1-232) expression, their introduction into TH(241-348) was without discernible effects. However, Trp-265 substitutions in the EF(233-348) and TH(241-348) fragments conferred significant EF(1-232) production. Therefore, key residues in the transmembrane helices may exert their effects on opsin folding, assembly, and/or function by influencing the conformation of the connecting loops.
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Affiliation(s)
- K D Ridge
- Center for Advanced Research in Biotechnology, National Institute of Standards and Technology and the University of Maryland Biotechnology Institute, Rockville, Maryland 20850, USA.
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Truong LD, Williams R, Ngo T, Cawood C, Chevez-Barrios P, Awalt HL, Brown RW, Younes M, Ro JY. Adult mesoblastic nephroma: expansion of the morphologic spectrum and review of literature. Am J Surg Pathol 1998; 22:827-39. [PMID: 9669345 DOI: 10.1097/00000478-199807000-00005] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Mesoblastic nephroma (MN) is a distinctive tumor that is seen mostly in early infancy and that consists of classic and cellular (atypical) variants. Mesoblastic nephroma rarely occurs in adulthood, but MN in this age group still is poorly characterized because there are only 17 reported cases. We describe five additional cases of adult MN, including one case of the cellular variant, characterize the immunohistochemical profiles in detail, and critically review the previously reported cases. The collective data obtained from these 22 cases of adult MN showed that the patients predominantly were women (20 cases), ranging in age from 19 to 78 years, who were asymptomatic (5 cases) or had nonspecific signs and symptoms referable to a renal mass. Twenty tumors were classified as classic and 2 as cellular. The tumors were 2-24 cm, well circumscribed, and partially encapsulated and displayed a solid/ cystic cut surface, with a predominantly solid component in most tumors. One tumor, however, was almost purely cystic. Most tumors extended to the renal sinus. and some appeared entirely intrapelvic on imaging studies; however, gross and microscopic evaluation did not show destructive invasion of the pelvic wall. Extension of the tumor beyond the renal capsule has not been described. Each tumor was composed of epithelial and stromal components both. The epithelial component, which displayed no difference between the classic and cellular variants, was composed of isolated or clustered tubules and cysts lined by a benign epithelium with a wide range of cytologic differentiation. The stromal cells were composed of fibroblasts, myofibroblasts, and smooth muscle cells in various combinations. Stromal cellularity was low for the classic variant but high for the cellular variant. Hemorrhage, necrosis, and high mitotic index were noted in the stroma of the cellular, but not in the classic variant. Immunohistochemical study applied to the five current cases and seven normal control kidneys confirmed the presence of fibroblasts, myofibroblasts, smooth muscle cells, and prominent vessels in the stroma of each tumor. Most cysts and tubules within the tumors had a distinctive immunohistochemical profile, similar to that of collecting duct but different from those of other portions of the nephron in the normal control kidneys. After total or partial nephrectomy, without adjuvant chemotherapy or radiotherapy, 19 patients, including the 2 with cellular MN, were alive and well at 8-months to 48-years follow-up. Follow-up was not available in two patients. The remaining patient had recurrence at the surgical site 24 years after nephrectomy. Adult MN displays a distinctive morphologic spectrum that parallels that of its pediatric congener. It probably is a benign tumor that can be treated successfully by complete excision. The collecting duct differentiation expressed by most tubules and cysts of adult MN implies ureteric bud, which is the exclusive embryologic origin of collecting duct, as an important element in the histogenesis of this rare but fascinating type of tumor.
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Affiliation(s)
- L D Truong
- Department of Pathology, Baylor College of Medicine, The Methodist Hospital, Houston, Texas 77030, USA
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Rosenberg J, Van Sluis R, Ngo T. A synthetic affinity ligand for purifying immunoglobulins from goat serum. Am Biotechnol Lab 1993; 11:82. [PMID: 7763655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Schlesinger C, Raabe G, Ngo T, Miller K. Discordant findings in chorionic villus direct preparation and long term culture--mosaicism in the fetus. Prenat Diagn 1990; 10:609-12. [PMID: 2267239 DOI: 10.1002/pd.1970100910] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Prenatal cytogenetic study of chorionic villi showed a discrepancy between a normal female karyotype 46,XX in the direct preparation after short-term incubation, and a 45,X karyotype in the long-term culture. The subsequent amniocentesis revealed a normal karyotype in three cultures and a 45,X/46,XX mosaicism in one culture. Cytogenetic analysis of chorionic villi after termination of the pregnancy showed a normal karyotype in the direct preparation and a 45,X/46,XX mosaicism in the long-term culture. Fetal lymphocytes showed normal karyotypes, whereas fibroblast cultures revealed a 45,X/46,XX mosaicism.
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Affiliation(s)
- C Schlesinger
- Department of Human Genetics, Medizinische Hochschule Hannover, F.R.G
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Knopman DS, Christensen KJ, Schut LJ, Harbaugh RE, Reeder T, Ngo T, Frey W. The spectrum of imaging and neuropsychological findings in Pick's disease. Neurology 1989; 39:362-8. [PMID: 2927644 DOI: 10.1212/wnl.39.3.362] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.5] [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: 01/03/2023] Open
Abstract
To seek improved methods for the diagnosis of Pick's disease, we reviewed imaging studies of four women and two men (ages 48 to 65 years at onset) and psychometric testing of three of them with autopsy or biopsy-proved Pick's. The presence of Pick bodies was required for the diagnosis. Seven patients with biopsy-proved Alzheimer's disease served as a comparison group. In the Pick's patients, CT in five of six showed marked frontal pole or temporal pole atrophy, which clearly differed from the pattern of cerebral atrophy seen in the Alzheimer's patients. Psychometric testing showed performance patterns that tended to differ from those of the Alzheimer's patients in that recent memory was relatively preserved despite marked impairment of executive functions. The distinctive psychometric pattern in the Pick's patients was evanescent, however. Thus, there were imaging and psychometric findings of potential diagnostic value for Pick's disease, but, for different reasons, they were imperfect.
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Affiliation(s)
- D S Knopman
- Department of Neurology, University of Minnesota, MN 55455
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Felt R, Walt PJ, Ngo T. "This is the place to be." Students look at career choices. Interview by Joyce Flory. Healthc Exec 1989; 4:30-2. [PMID: 10303187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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Abstract
Friedreich's ataxia patients show evidence of an abnormally elevated and prolonged response of pyruvate and lactate to a glucose load, with normal fasting levels. However, ther is a bimodal distribution of this response with high and low pyruvate responders. This trait appears to be determined genetically, However, although in vivo tests suggest low oxidation of pyruvate, we were unable to confirm any in vitro impairment of each of the components of the pyruvate dehydrogenase (PDH) complex. We conclude that the defect is in the metabolic regulation of PDH, probably at the E3 (lipoamide dehydrogenase) step.
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Ngo T, Winchell HS, Landaw S. Altered in vivo metabolism of histidine (imidazole-2-14C) in irradiated rats. Radiat Res 1968; 34:390-5. [PMID: 5647799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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